130f712c9SDave Chinner /* 230f712c9SDave Chinner * Copyright (c) 2000-2006 Silicon Graphics, Inc. 330f712c9SDave Chinner * All Rights Reserved. 430f712c9SDave Chinner * 530f712c9SDave Chinner * This program is free software; you can redistribute it and/or 630f712c9SDave Chinner * modify it under the terms of the GNU General Public License as 730f712c9SDave Chinner * published by the Free Software Foundation. 830f712c9SDave Chinner * 930f712c9SDave Chinner * This program is distributed in the hope that it would be useful, 1030f712c9SDave Chinner * but WITHOUT ANY WARRANTY; without even the implied warranty of 1130f712c9SDave Chinner * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1230f712c9SDave Chinner * GNU General Public License for more details. 1330f712c9SDave Chinner * 1430f712c9SDave Chinner * You should have received a copy of the GNU General Public License 1530f712c9SDave Chinner * along with this program; if not, write the Free Software Foundation, 1630f712c9SDave Chinner * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 1730f712c9SDave Chinner */ 1830f712c9SDave Chinner #include "xfs.h" 1930f712c9SDave Chinner #include "xfs_fs.h" 2030f712c9SDave Chinner #include "xfs_shared.h" 2130f712c9SDave Chinner #include "xfs_format.h" 2230f712c9SDave Chinner #include "xfs_log_format.h" 2330f712c9SDave Chinner #include "xfs_trans_resv.h" 2430f712c9SDave Chinner #include "xfs_bit.h" 2530f712c9SDave Chinner #include "xfs_sb.h" 2630f712c9SDave Chinner #include "xfs_mount.h" 273ab78df2SDarrick J. Wong #include "xfs_defer.h" 2830f712c9SDave Chinner #include "xfs_da_format.h" 2930f712c9SDave Chinner #include "xfs_da_btree.h" 3030f712c9SDave Chinner #include "xfs_dir2.h" 3130f712c9SDave Chinner #include "xfs_inode.h" 3230f712c9SDave Chinner #include "xfs_btree.h" 3330f712c9SDave Chinner #include "xfs_trans.h" 3430f712c9SDave Chinner #include "xfs_inode_item.h" 3530f712c9SDave Chinner #include "xfs_extfree_item.h" 3630f712c9SDave Chinner #include "xfs_alloc.h" 3730f712c9SDave Chinner #include "xfs_bmap.h" 3830f712c9SDave Chinner #include "xfs_bmap_util.h" 3930f712c9SDave Chinner #include "xfs_bmap_btree.h" 4030f712c9SDave Chinner #include "xfs_rtalloc.h" 4130f712c9SDave Chinner #include "xfs_error.h" 4230f712c9SDave Chinner #include "xfs_quota.h" 4330f712c9SDave Chinner #include "xfs_trans_space.h" 4430f712c9SDave Chinner #include "xfs_buf_item.h" 4530f712c9SDave Chinner #include "xfs_trace.h" 4630f712c9SDave Chinner #include "xfs_symlink.h" 4730f712c9SDave Chinner #include "xfs_attr_leaf.h" 4830f712c9SDave Chinner #include "xfs_filestream.h" 49340785ccSDarrick J. Wong #include "xfs_rmap.h" 503fd129b6SDarrick J. Wong #include "xfs_ag_resv.h" 5162aab20fSDarrick J. Wong #include "xfs_refcount.h" 52fd26a880SDarrick J. Wong #include "xfs_rmap_btree.h" 53974ae922SBrian Foster #include "xfs_icache.h" 5430f712c9SDave Chinner 5530f712c9SDave Chinner 5630f712c9SDave Chinner kmem_zone_t *xfs_bmap_free_item_zone; 5730f712c9SDave Chinner 5830f712c9SDave Chinner /* 5930f712c9SDave Chinner * Miscellaneous helper functions 6030f712c9SDave Chinner */ 6130f712c9SDave Chinner 6230f712c9SDave Chinner /* 6330f712c9SDave Chinner * Compute and fill in the value of the maximum depth of a bmap btree 6430f712c9SDave Chinner * in this filesystem. Done once, during mount. 6530f712c9SDave Chinner */ 6630f712c9SDave Chinner void 6730f712c9SDave Chinner xfs_bmap_compute_maxlevels( 6830f712c9SDave Chinner xfs_mount_t *mp, /* file system mount structure */ 6930f712c9SDave Chinner int whichfork) /* data or attr fork */ 7030f712c9SDave Chinner { 7130f712c9SDave Chinner int level; /* btree level */ 7230f712c9SDave Chinner uint maxblocks; /* max blocks at this level */ 7330f712c9SDave Chinner uint maxleafents; /* max leaf entries possible */ 7430f712c9SDave Chinner int maxrootrecs; /* max records in root block */ 7530f712c9SDave Chinner int minleafrecs; /* min records in leaf block */ 7630f712c9SDave Chinner int minnoderecs; /* min records in node block */ 7730f712c9SDave Chinner int sz; /* root block size */ 7830f712c9SDave Chinner 7930f712c9SDave Chinner /* 8030f712c9SDave Chinner * The maximum number of extents in a file, hence the maximum 8130f712c9SDave Chinner * number of leaf entries, is controlled by the type of di_nextents 8230f712c9SDave Chinner * (a signed 32-bit number, xfs_extnum_t), or by di_anextents 8330f712c9SDave Chinner * (a signed 16-bit number, xfs_aextnum_t). 8430f712c9SDave Chinner * 8530f712c9SDave Chinner * Note that we can no longer assume that if we are in ATTR1 that 8630f712c9SDave Chinner * the fork offset of all the inodes will be 8730f712c9SDave Chinner * (xfs_default_attroffset(ip) >> 3) because we could have mounted 8830f712c9SDave Chinner * with ATTR2 and then mounted back with ATTR1, keeping the 8930f712c9SDave Chinner * di_forkoff's fixed but probably at various positions. Therefore, 9030f712c9SDave Chinner * for both ATTR1 and ATTR2 we have to assume the worst case scenario 9130f712c9SDave Chinner * of a minimum size available. 9230f712c9SDave Chinner */ 9330f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) { 9430f712c9SDave Chinner maxleafents = MAXEXTNUM; 9530f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); 9630f712c9SDave Chinner } else { 9730f712c9SDave Chinner maxleafents = MAXAEXTNUM; 9830f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); 9930f712c9SDave Chinner } 10030f712c9SDave Chinner maxrootrecs = xfs_bmdr_maxrecs(sz, 0); 10130f712c9SDave Chinner minleafrecs = mp->m_bmap_dmnr[0]; 10230f712c9SDave Chinner minnoderecs = mp->m_bmap_dmnr[1]; 10330f712c9SDave Chinner maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; 10430f712c9SDave Chinner for (level = 1; maxblocks > 1; level++) { 10530f712c9SDave Chinner if (maxblocks <= maxrootrecs) 10630f712c9SDave Chinner maxblocks = 1; 10730f712c9SDave Chinner else 10830f712c9SDave Chinner maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; 10930f712c9SDave Chinner } 11030f712c9SDave Chinner mp->m_bm_maxlevels[whichfork] = level; 11130f712c9SDave Chinner } 11230f712c9SDave Chinner 11330f712c9SDave Chinner STATIC int /* error */ 11430f712c9SDave Chinner xfs_bmbt_lookup_eq( 11530f712c9SDave Chinner struct xfs_btree_cur *cur, 11630f712c9SDave Chinner xfs_fileoff_t off, 11730f712c9SDave Chinner xfs_fsblock_t bno, 11830f712c9SDave Chinner xfs_filblks_t len, 11930f712c9SDave Chinner int *stat) /* success/failure */ 12030f712c9SDave Chinner { 12130f712c9SDave Chinner cur->bc_rec.b.br_startoff = off; 12230f712c9SDave Chinner cur->bc_rec.b.br_startblock = bno; 12330f712c9SDave Chinner cur->bc_rec.b.br_blockcount = len; 12430f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); 12530f712c9SDave Chinner } 12630f712c9SDave Chinner 12730f712c9SDave Chinner STATIC int /* error */ 12830f712c9SDave Chinner xfs_bmbt_lookup_ge( 12930f712c9SDave Chinner struct xfs_btree_cur *cur, 13030f712c9SDave Chinner xfs_fileoff_t off, 13130f712c9SDave Chinner xfs_fsblock_t bno, 13230f712c9SDave Chinner xfs_filblks_t len, 13330f712c9SDave Chinner int *stat) /* success/failure */ 13430f712c9SDave Chinner { 13530f712c9SDave Chinner cur->bc_rec.b.br_startoff = off; 13630f712c9SDave Chinner cur->bc_rec.b.br_startblock = bno; 13730f712c9SDave Chinner cur->bc_rec.b.br_blockcount = len; 13830f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); 13930f712c9SDave Chinner } 14030f712c9SDave Chinner 14130f712c9SDave Chinner /* 14230f712c9SDave Chinner * Check if the inode needs to be converted to btree format. 14330f712c9SDave Chinner */ 14430f712c9SDave Chinner static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) 14530f712c9SDave Chinner { 14660b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 14760b4984fSDarrick J. Wong XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && 14830f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) > 14930f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork); 15030f712c9SDave Chinner } 15130f712c9SDave Chinner 15230f712c9SDave Chinner /* 15330f712c9SDave Chinner * Check if the inode should be converted to extent format. 15430f712c9SDave Chinner */ 15530f712c9SDave Chinner static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) 15630f712c9SDave Chinner { 15760b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 15860b4984fSDarrick J. Wong XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && 15930f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) <= 16030f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork); 16130f712c9SDave Chinner } 16230f712c9SDave Chinner 16330f712c9SDave Chinner /* 16430f712c9SDave Chinner * Update the record referred to by cur to the value given 16530f712c9SDave Chinner * by [off, bno, len, state]. 16630f712c9SDave Chinner * This either works (return 0) or gets an EFSCORRUPTED error. 16730f712c9SDave Chinner */ 16830f712c9SDave Chinner STATIC int 16930f712c9SDave Chinner xfs_bmbt_update( 17030f712c9SDave Chinner struct xfs_btree_cur *cur, 17130f712c9SDave Chinner xfs_fileoff_t off, 17230f712c9SDave Chinner xfs_fsblock_t bno, 17330f712c9SDave Chinner xfs_filblks_t len, 17430f712c9SDave Chinner xfs_exntst_t state) 17530f712c9SDave Chinner { 17630f712c9SDave Chinner union xfs_btree_rec rec; 17730f712c9SDave Chinner 17830f712c9SDave Chinner xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); 17930f712c9SDave Chinner return xfs_btree_update(cur, &rec); 18030f712c9SDave Chinner } 18130f712c9SDave Chinner 18230f712c9SDave Chinner /* 18330f712c9SDave Chinner * Compute the worst-case number of indirect blocks that will be used 18430f712c9SDave Chinner * for ip's delayed extent of length "len". 18530f712c9SDave Chinner */ 18630f712c9SDave Chinner STATIC xfs_filblks_t 18730f712c9SDave Chinner xfs_bmap_worst_indlen( 18830f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 18930f712c9SDave Chinner xfs_filblks_t len) /* delayed extent length */ 19030f712c9SDave Chinner { 19130f712c9SDave Chinner int level; /* btree level number */ 19230f712c9SDave Chinner int maxrecs; /* maximum record count at this level */ 19330f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 19430f712c9SDave Chinner xfs_filblks_t rval; /* return value */ 195fd26a880SDarrick J. Wong xfs_filblks_t orig_len; 19630f712c9SDave Chinner 19730f712c9SDave Chinner mp = ip->i_mount; 198fd26a880SDarrick J. Wong 199fd26a880SDarrick J. Wong /* Calculate the worst-case size of the bmbt. */ 200fd26a880SDarrick J. Wong orig_len = len; 20130f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[0]; 20230f712c9SDave Chinner for (level = 0, rval = 0; 20330f712c9SDave Chinner level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); 20430f712c9SDave Chinner level++) { 20530f712c9SDave Chinner len += maxrecs - 1; 20630f712c9SDave Chinner do_div(len, maxrecs); 20730f712c9SDave Chinner rval += len; 208fd26a880SDarrick J. Wong if (len == 1) { 209fd26a880SDarrick J. Wong rval += XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - 21030f712c9SDave Chinner level - 1; 211fd26a880SDarrick J. Wong break; 212fd26a880SDarrick J. Wong } 21330f712c9SDave Chinner if (level == 0) 21430f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[1]; 21530f712c9SDave Chinner } 216fd26a880SDarrick J. Wong 217fd26a880SDarrick J. Wong /* Calculate the worst-case size of the rmapbt. */ 218fd26a880SDarrick J. Wong if (xfs_sb_version_hasrmapbt(&mp->m_sb)) 219fd26a880SDarrick J. Wong rval += 1 + xfs_rmapbt_calc_size(mp, orig_len) + 220fd26a880SDarrick J. Wong mp->m_rmap_maxlevels; 221fd26a880SDarrick J. Wong 22230f712c9SDave Chinner return rval; 22330f712c9SDave Chinner } 22430f712c9SDave Chinner 22530f712c9SDave Chinner /* 22630f712c9SDave Chinner * Calculate the default attribute fork offset for newly created inodes. 22730f712c9SDave Chinner */ 22830f712c9SDave Chinner uint 22930f712c9SDave Chinner xfs_default_attroffset( 23030f712c9SDave Chinner struct xfs_inode *ip) 23130f712c9SDave Chinner { 23230f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 23330f712c9SDave Chinner uint offset; 23430f712c9SDave Chinner 23530f712c9SDave Chinner if (mp->m_sb.sb_inodesize == 256) { 23630f712c9SDave Chinner offset = XFS_LITINO(mp, ip->i_d.di_version) - 23730f712c9SDave Chinner XFS_BMDR_SPACE_CALC(MINABTPTRS); 23830f712c9SDave Chinner } else { 23930f712c9SDave Chinner offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); 24030f712c9SDave Chinner } 24130f712c9SDave Chinner 24230f712c9SDave Chinner ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); 24330f712c9SDave Chinner return offset; 24430f712c9SDave Chinner } 24530f712c9SDave Chinner 24630f712c9SDave Chinner /* 24730f712c9SDave Chinner * Helper routine to reset inode di_forkoff field when switching 24830f712c9SDave Chinner * attribute fork from local to extent format - we reset it where 24930f712c9SDave Chinner * possible to make space available for inline data fork extents. 25030f712c9SDave Chinner */ 25130f712c9SDave Chinner STATIC void 25230f712c9SDave Chinner xfs_bmap_forkoff_reset( 25330f712c9SDave Chinner xfs_inode_t *ip, 25430f712c9SDave Chinner int whichfork) 25530f712c9SDave Chinner { 25630f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK && 25730f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_DEV && 25830f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_UUID && 25930f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { 26030f712c9SDave Chinner uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; 26130f712c9SDave Chinner 26230f712c9SDave Chinner if (dfl_forkoff > ip->i_d.di_forkoff) 26330f712c9SDave Chinner ip->i_d.di_forkoff = dfl_forkoff; 26430f712c9SDave Chinner } 26530f712c9SDave Chinner } 26630f712c9SDave Chinner 26730f712c9SDave Chinner #ifdef DEBUG 26830f712c9SDave Chinner STATIC struct xfs_buf * 26930f712c9SDave Chinner xfs_bmap_get_bp( 27030f712c9SDave Chinner struct xfs_btree_cur *cur, 27130f712c9SDave Chinner xfs_fsblock_t bno) 27230f712c9SDave Chinner { 27330f712c9SDave Chinner struct xfs_log_item_desc *lidp; 27430f712c9SDave Chinner int i; 27530f712c9SDave Chinner 27630f712c9SDave Chinner if (!cur) 27730f712c9SDave Chinner return NULL; 27830f712c9SDave Chinner 27930f712c9SDave Chinner for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { 28030f712c9SDave Chinner if (!cur->bc_bufs[i]) 28130f712c9SDave Chinner break; 28230f712c9SDave Chinner if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) 28330f712c9SDave Chinner return cur->bc_bufs[i]; 28430f712c9SDave Chinner } 28530f712c9SDave Chinner 28630f712c9SDave Chinner /* Chase down all the log items to see if the bp is there */ 28730f712c9SDave Chinner list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { 28830f712c9SDave Chinner struct xfs_buf_log_item *bip; 28930f712c9SDave Chinner bip = (struct xfs_buf_log_item *)lidp->lid_item; 29030f712c9SDave Chinner if (bip->bli_item.li_type == XFS_LI_BUF && 29130f712c9SDave Chinner XFS_BUF_ADDR(bip->bli_buf) == bno) 29230f712c9SDave Chinner return bip->bli_buf; 29330f712c9SDave Chinner } 29430f712c9SDave Chinner 29530f712c9SDave Chinner return NULL; 29630f712c9SDave Chinner } 29730f712c9SDave Chinner 29830f712c9SDave Chinner STATIC void 29930f712c9SDave Chinner xfs_check_block( 30030f712c9SDave Chinner struct xfs_btree_block *block, 30130f712c9SDave Chinner xfs_mount_t *mp, 30230f712c9SDave Chinner int root, 30330f712c9SDave Chinner short sz) 30430f712c9SDave Chinner { 30530f712c9SDave Chinner int i, j, dmxr; 30630f712c9SDave Chinner __be64 *pp, *thispa; /* pointer to block address */ 30730f712c9SDave Chinner xfs_bmbt_key_t *prevp, *keyp; 30830f712c9SDave Chinner 30930f712c9SDave Chinner ASSERT(be16_to_cpu(block->bb_level) > 0); 31030f712c9SDave Chinner 31130f712c9SDave Chinner prevp = NULL; 31230f712c9SDave Chinner for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { 31330f712c9SDave Chinner dmxr = mp->m_bmap_dmxr[0]; 31430f712c9SDave Chinner keyp = XFS_BMBT_KEY_ADDR(mp, block, i); 31530f712c9SDave Chinner 31630f712c9SDave Chinner if (prevp) { 31730f712c9SDave Chinner ASSERT(be64_to_cpu(prevp->br_startoff) < 31830f712c9SDave Chinner be64_to_cpu(keyp->br_startoff)); 31930f712c9SDave Chinner } 32030f712c9SDave Chinner prevp = keyp; 32130f712c9SDave Chinner 32230f712c9SDave Chinner /* 32330f712c9SDave Chinner * Compare the block numbers to see if there are dups. 32430f712c9SDave Chinner */ 32530f712c9SDave Chinner if (root) 32630f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); 32730f712c9SDave Chinner else 32830f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); 32930f712c9SDave Chinner 33030f712c9SDave Chinner for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { 33130f712c9SDave Chinner if (root) 33230f712c9SDave Chinner thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); 33330f712c9SDave Chinner else 33430f712c9SDave Chinner thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); 33530f712c9SDave Chinner if (*thispa == *pp) { 33630f712c9SDave Chinner xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", 33730f712c9SDave Chinner __func__, j, i, 33830f712c9SDave Chinner (unsigned long long)be64_to_cpu(*thispa)); 33930f712c9SDave Chinner panic("%s: ptrs are equal in node\n", 34030f712c9SDave Chinner __func__); 34130f712c9SDave Chinner } 34230f712c9SDave Chinner } 34330f712c9SDave Chinner } 34430f712c9SDave Chinner } 34530f712c9SDave Chinner 34630f712c9SDave Chinner /* 34730f712c9SDave Chinner * Check that the extents for the inode ip are in the right order in all 348e3543819SDave Chinner * btree leaves. THis becomes prohibitively expensive for large extent count 349e3543819SDave Chinner * files, so don't bother with inodes that have more than 10,000 extents in 350e3543819SDave Chinner * them. The btree record ordering checks will still be done, so for such large 351e3543819SDave Chinner * bmapbt constructs that is going to catch most corruptions. 35230f712c9SDave Chinner */ 35330f712c9SDave Chinner STATIC void 35430f712c9SDave Chinner xfs_bmap_check_leaf_extents( 35530f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor or null */ 35630f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 35730f712c9SDave Chinner int whichfork) /* data or attr fork */ 35830f712c9SDave Chinner { 35930f712c9SDave Chinner struct xfs_btree_block *block; /* current btree block */ 36030f712c9SDave Chinner xfs_fsblock_t bno; /* block # of "block" */ 36130f712c9SDave Chinner xfs_buf_t *bp; /* buffer for "block" */ 36230f712c9SDave Chinner int error; /* error return value */ 36330f712c9SDave Chinner xfs_extnum_t i=0, j; /* index into the extents list */ 36430f712c9SDave Chinner xfs_ifork_t *ifp; /* fork structure */ 36530f712c9SDave Chinner int level; /* btree level, for checking */ 36630f712c9SDave Chinner xfs_mount_t *mp; /* file system mount structure */ 36730f712c9SDave Chinner __be64 *pp; /* pointer to block address */ 36830f712c9SDave Chinner xfs_bmbt_rec_t *ep; /* pointer to current extent */ 36930f712c9SDave Chinner xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ 37030f712c9SDave Chinner xfs_bmbt_rec_t *nextp; /* pointer to next extent */ 37130f712c9SDave Chinner int bp_release = 0; 37230f712c9SDave Chinner 37330f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { 37430f712c9SDave Chinner return; 37530f712c9SDave Chinner } 37630f712c9SDave Chinner 377e3543819SDave Chinner /* skip large extent count inodes */ 378e3543819SDave Chinner if (ip->i_d.di_nextents > 10000) 379e3543819SDave Chinner return; 380e3543819SDave Chinner 38130f712c9SDave Chinner bno = NULLFSBLOCK; 38230f712c9SDave Chinner mp = ip->i_mount; 38330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 38430f712c9SDave Chinner block = ifp->if_broot; 38530f712c9SDave Chinner /* 38630f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 38730f712c9SDave Chinner */ 38830f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 38930f712c9SDave Chinner ASSERT(level > 0); 39030f712c9SDave Chinner xfs_check_block(block, mp, 1, ifp->if_broot_bytes); 39130f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 39230f712c9SDave Chinner bno = be64_to_cpu(*pp); 39330f712c9SDave Chinner 394d5cf09baSChristoph Hellwig ASSERT(bno != NULLFSBLOCK); 39530f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); 39630f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); 39730f712c9SDave Chinner 39830f712c9SDave Chinner /* 39930f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 40030f712c9SDave Chinner * pointer (leftmost) at each level. 40130f712c9SDave Chinner */ 40230f712c9SDave Chinner while (level-- > 0) { 40330f712c9SDave Chinner /* See if buf is in cur first */ 40430f712c9SDave Chinner bp_release = 0; 40530f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 40630f712c9SDave Chinner if (!bp) { 40730f712c9SDave Chinner bp_release = 1; 40830f712c9SDave Chinner error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, 40930f712c9SDave Chinner XFS_BMAP_BTREE_REF, 41030f712c9SDave Chinner &xfs_bmbt_buf_ops); 41130f712c9SDave Chinner if (error) 41230f712c9SDave Chinner goto error_norelse; 41330f712c9SDave Chinner } 41430f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 41530f712c9SDave Chinner if (level == 0) 41630f712c9SDave Chinner break; 41730f712c9SDave Chinner 41830f712c9SDave Chinner /* 41930f712c9SDave Chinner * Check this block for basic sanity (increasing keys and 42030f712c9SDave Chinner * no duplicate blocks). 42130f712c9SDave Chinner */ 42230f712c9SDave Chinner 42330f712c9SDave Chinner xfs_check_block(block, mp, 0, 0); 42430f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 42530f712c9SDave Chinner bno = be64_to_cpu(*pp); 426c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 427c29aad41SEric Sandeen XFS_FSB_SANITY_CHECK(mp, bno), error0); 42830f712c9SDave Chinner if (bp_release) { 42930f712c9SDave Chinner bp_release = 0; 43030f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 43130f712c9SDave Chinner } 43230f712c9SDave Chinner } 43330f712c9SDave Chinner 43430f712c9SDave Chinner /* 43530f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 43630f712c9SDave Chinner */ 43730f712c9SDave Chinner i = 0; 43830f712c9SDave Chinner 43930f712c9SDave Chinner /* 44030f712c9SDave Chinner * Loop over all leaf nodes checking that all extents are in the right order. 44130f712c9SDave Chinner */ 44230f712c9SDave Chinner for (;;) { 44330f712c9SDave Chinner xfs_fsblock_t nextbno; 44430f712c9SDave Chinner xfs_extnum_t num_recs; 44530f712c9SDave Chinner 44630f712c9SDave Chinner 44730f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 44830f712c9SDave Chinner 44930f712c9SDave Chinner /* 45030f712c9SDave Chinner * Read-ahead the next leaf block, if any. 45130f712c9SDave Chinner */ 45230f712c9SDave Chinner 45330f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 45430f712c9SDave Chinner 45530f712c9SDave Chinner /* 45630f712c9SDave Chinner * Check all the extents to make sure they are OK. 45730f712c9SDave Chinner * If we had a previous block, the last entry should 45830f712c9SDave Chinner * conform with the first entry in this one. 45930f712c9SDave Chinner */ 46030f712c9SDave Chinner 46130f712c9SDave Chinner ep = XFS_BMBT_REC_ADDR(mp, block, 1); 46230f712c9SDave Chinner if (i) { 46330f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(&last) + 46430f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(&last) <= 46530f712c9SDave Chinner xfs_bmbt_disk_get_startoff(ep)); 46630f712c9SDave Chinner } 46730f712c9SDave Chinner for (j = 1; j < num_recs; j++) { 46830f712c9SDave Chinner nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); 46930f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(ep) + 47030f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(ep) <= 47130f712c9SDave Chinner xfs_bmbt_disk_get_startoff(nextp)); 47230f712c9SDave Chinner ep = nextp; 47330f712c9SDave Chinner } 47430f712c9SDave Chinner 47530f712c9SDave Chinner last = *ep; 47630f712c9SDave Chinner i += num_recs; 47730f712c9SDave Chinner if (bp_release) { 47830f712c9SDave Chinner bp_release = 0; 47930f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 48030f712c9SDave Chinner } 48130f712c9SDave Chinner bno = nextbno; 48230f712c9SDave Chinner /* 48330f712c9SDave Chinner * If we've reached the end, stop. 48430f712c9SDave Chinner */ 48530f712c9SDave Chinner if (bno == NULLFSBLOCK) 48630f712c9SDave Chinner break; 48730f712c9SDave Chinner 48830f712c9SDave Chinner bp_release = 0; 48930f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 49030f712c9SDave Chinner if (!bp) { 49130f712c9SDave Chinner bp_release = 1; 49230f712c9SDave Chinner error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, 49330f712c9SDave Chinner XFS_BMAP_BTREE_REF, 49430f712c9SDave Chinner &xfs_bmbt_buf_ops); 49530f712c9SDave Chinner if (error) 49630f712c9SDave Chinner goto error_norelse; 49730f712c9SDave Chinner } 49830f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 49930f712c9SDave Chinner } 500a5fd276bSLuis de Bethencourt 50130f712c9SDave Chinner return; 50230f712c9SDave Chinner 50330f712c9SDave Chinner error0: 50430f712c9SDave Chinner xfs_warn(mp, "%s: at error0", __func__); 50530f712c9SDave Chinner if (bp_release) 50630f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 50730f712c9SDave Chinner error_norelse: 50830f712c9SDave Chinner xfs_warn(mp, "%s: BAD after btree leaves for %d extents", 50930f712c9SDave Chinner __func__, i); 51030f712c9SDave Chinner panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); 51130f712c9SDave Chinner return; 51230f712c9SDave Chinner } 51330f712c9SDave Chinner 51430f712c9SDave Chinner /* 51530f712c9SDave Chinner * Add bmap trace insert entries for all the contents of the extent records. 51630f712c9SDave Chinner */ 51730f712c9SDave Chinner void 51830f712c9SDave Chinner xfs_bmap_trace_exlist( 51930f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 52030f712c9SDave Chinner xfs_extnum_t cnt, /* count of entries in the list */ 521c44a1f22SEric Sandeen int whichfork, /* data or attr or cow fork */ 52230f712c9SDave Chinner unsigned long caller_ip) 52330f712c9SDave Chinner { 52430f712c9SDave Chinner xfs_extnum_t idx; /* extent record index */ 52530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 52630f712c9SDave Chinner int state = 0; 52730f712c9SDave Chinner 52830f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK) 52930f712c9SDave Chinner state |= BMAP_ATTRFORK; 530c44a1f22SEric Sandeen else if (whichfork == XFS_COW_FORK) 531c44a1f22SEric Sandeen state |= BMAP_COWFORK; 53230f712c9SDave Chinner 53330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 5345d829300SEric Sandeen ASSERT(cnt == xfs_iext_count(ifp)); 53530f712c9SDave Chinner for (idx = 0; idx < cnt; idx++) 5367710517fSEric Sandeen trace_xfs_extlist(ip, idx, state, caller_ip); 53730f712c9SDave Chinner } 53830f712c9SDave Chinner 53930f712c9SDave Chinner /* 54030f712c9SDave Chinner * Validate that the bmbt_irecs being returned from bmapi are valid 54130f712c9SDave Chinner * given the caller's original parameters. Specifically check the 54230f712c9SDave Chinner * ranges of the returned irecs to ensure that they only extend beyond 54330f712c9SDave Chinner * the given parameters if the XFS_BMAPI_ENTIRE flag was set. 54430f712c9SDave Chinner */ 54530f712c9SDave Chinner STATIC void 54630f712c9SDave Chinner xfs_bmap_validate_ret( 54730f712c9SDave Chinner xfs_fileoff_t bno, 54830f712c9SDave Chinner xfs_filblks_t len, 54930f712c9SDave Chinner int flags, 55030f712c9SDave Chinner xfs_bmbt_irec_t *mval, 55130f712c9SDave Chinner int nmap, 55230f712c9SDave Chinner int ret_nmap) 55330f712c9SDave Chinner { 55430f712c9SDave Chinner int i; /* index to map values */ 55530f712c9SDave Chinner 55630f712c9SDave Chinner ASSERT(ret_nmap <= nmap); 55730f712c9SDave Chinner 55830f712c9SDave Chinner for (i = 0; i < ret_nmap; i++) { 55930f712c9SDave Chinner ASSERT(mval[i].br_blockcount > 0); 56030f712c9SDave Chinner if (!(flags & XFS_BMAPI_ENTIRE)) { 56130f712c9SDave Chinner ASSERT(mval[i].br_startoff >= bno); 56230f712c9SDave Chinner ASSERT(mval[i].br_blockcount <= len); 56330f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= 56430f712c9SDave Chinner bno + len); 56530f712c9SDave Chinner } else { 56630f712c9SDave Chinner ASSERT(mval[i].br_startoff < bno + len); 56730f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount > 56830f712c9SDave Chinner bno); 56930f712c9SDave Chinner } 57030f712c9SDave Chinner ASSERT(i == 0 || 57130f712c9SDave Chinner mval[i - 1].br_startoff + mval[i - 1].br_blockcount == 57230f712c9SDave Chinner mval[i].br_startoff); 57330f712c9SDave Chinner ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && 57430f712c9SDave Chinner mval[i].br_startblock != HOLESTARTBLOCK); 57530f712c9SDave Chinner ASSERT(mval[i].br_state == XFS_EXT_NORM || 57630f712c9SDave Chinner mval[i].br_state == XFS_EXT_UNWRITTEN); 57730f712c9SDave Chinner } 57830f712c9SDave Chinner } 57930f712c9SDave Chinner 58030f712c9SDave Chinner #else 58130f712c9SDave Chinner #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) 58230f712c9SDave Chinner #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) 58330f712c9SDave Chinner #endif /* DEBUG */ 58430f712c9SDave Chinner 58530f712c9SDave Chinner /* 58630f712c9SDave Chinner * bmap free list manipulation functions 58730f712c9SDave Chinner */ 58830f712c9SDave Chinner 58930f712c9SDave Chinner /* 59030f712c9SDave Chinner * Add the extent to the list of extents to be free at transaction end. 59130f712c9SDave Chinner * The list is maintained sorted (by block number). 59230f712c9SDave Chinner */ 59330f712c9SDave Chinner void 59430f712c9SDave Chinner xfs_bmap_add_free( 595340785ccSDarrick J. Wong struct xfs_mount *mp, 596340785ccSDarrick J. Wong struct xfs_defer_ops *dfops, 597340785ccSDarrick J. Wong xfs_fsblock_t bno, 598340785ccSDarrick J. Wong xfs_filblks_t len, 599340785ccSDarrick J. Wong struct xfs_owner_info *oinfo) 60030f712c9SDave Chinner { 601310a75a3SDarrick J. Wong struct xfs_extent_free_item *new; /* new element */ 60230f712c9SDave Chinner #ifdef DEBUG 60330f712c9SDave Chinner xfs_agnumber_t agno; 60430f712c9SDave Chinner xfs_agblock_t agbno; 60530f712c9SDave Chinner 60630f712c9SDave Chinner ASSERT(bno != NULLFSBLOCK); 60730f712c9SDave Chinner ASSERT(len > 0); 60830f712c9SDave Chinner ASSERT(len <= MAXEXTLEN); 60930f712c9SDave Chinner ASSERT(!isnullstartblock(bno)); 61030f712c9SDave Chinner agno = XFS_FSB_TO_AGNO(mp, bno); 61130f712c9SDave Chinner agbno = XFS_FSB_TO_AGBNO(mp, bno); 61230f712c9SDave Chinner ASSERT(agno < mp->m_sb.sb_agcount); 61330f712c9SDave Chinner ASSERT(agbno < mp->m_sb.sb_agblocks); 61430f712c9SDave Chinner ASSERT(len < mp->m_sb.sb_agblocks); 61530f712c9SDave Chinner ASSERT(agbno + len <= mp->m_sb.sb_agblocks); 61630f712c9SDave Chinner #endif 61730f712c9SDave Chinner ASSERT(xfs_bmap_free_item_zone != NULL); 618340785ccSDarrick J. Wong 61930f712c9SDave Chinner new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); 620310a75a3SDarrick J. Wong new->xefi_startblock = bno; 621310a75a3SDarrick J. Wong new->xefi_blockcount = (xfs_extlen_t)len; 622340785ccSDarrick J. Wong if (oinfo) 623340785ccSDarrick J. Wong new->xefi_oinfo = *oinfo; 624340785ccSDarrick J. Wong else 625340785ccSDarrick J. Wong xfs_rmap_skip_owner_update(&new->xefi_oinfo); 626ba9e7802SDarrick J. Wong trace_xfs_bmap_free_defer(mp, XFS_FSB_TO_AGNO(mp, bno), 0, 627ba9e7802SDarrick J. Wong XFS_FSB_TO_AGBNO(mp, bno), len); 6282c3234d1SDarrick J. Wong xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_FREE, &new->xefi_list); 62930f712c9SDave Chinner } 63030f712c9SDave Chinner 63130f712c9SDave Chinner /* 63230f712c9SDave Chinner * Inode fork format manipulation functions 63330f712c9SDave Chinner */ 63430f712c9SDave Chinner 63530f712c9SDave Chinner /* 63630f712c9SDave Chinner * Transform a btree format file with only one leaf node, where the 63730f712c9SDave Chinner * extents list will fit in the inode, into an extents format file. 63830f712c9SDave Chinner * Since the file extents are already in-core, all we have to do is 63930f712c9SDave Chinner * give up the space for the btree root and pitch the leaf block. 64030f712c9SDave Chinner */ 64130f712c9SDave Chinner STATIC int /* error */ 64230f712c9SDave Chinner xfs_bmap_btree_to_extents( 64330f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 64430f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 64530f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor */ 64630f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 64730f712c9SDave Chinner int whichfork) /* data or attr fork */ 64830f712c9SDave Chinner { 64930f712c9SDave Chinner /* REFERENCED */ 65030f712c9SDave Chinner struct xfs_btree_block *cblock;/* child btree block */ 65130f712c9SDave Chinner xfs_fsblock_t cbno; /* child block number */ 65230f712c9SDave Chinner xfs_buf_t *cbp; /* child block's buffer */ 65330f712c9SDave Chinner int error; /* error return value */ 65430f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork data */ 65530f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 65630f712c9SDave Chinner __be64 *pp; /* ptr to block address */ 65730f712c9SDave Chinner struct xfs_btree_block *rblock;/* root btree block */ 658340785ccSDarrick J. Wong struct xfs_owner_info oinfo; 65930f712c9SDave Chinner 66030f712c9SDave Chinner mp = ip->i_mount; 66130f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 66260b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 66330f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 66430f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); 66530f712c9SDave Chinner rblock = ifp->if_broot; 66630f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_level) == 1); 66730f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); 66830f712c9SDave Chinner ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); 66930f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); 67030f712c9SDave Chinner cbno = be64_to_cpu(*pp); 67130f712c9SDave Chinner *logflagsp = 0; 67230f712c9SDave Chinner #ifdef DEBUG 67330f712c9SDave Chinner if ((error = xfs_btree_check_lptr(cur, cbno, 1))) 67430f712c9SDave Chinner return error; 67530f712c9SDave Chinner #endif 67630f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, 67730f712c9SDave Chinner &xfs_bmbt_buf_ops); 67830f712c9SDave Chinner if (error) 67930f712c9SDave Chinner return error; 68030f712c9SDave Chinner cblock = XFS_BUF_TO_BLOCK(cbp); 68130f712c9SDave Chinner if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) 68230f712c9SDave Chinner return error; 683340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork); 684340785ccSDarrick J. Wong xfs_bmap_add_free(mp, cur->bc_private.b.dfops, cbno, 1, &oinfo); 68530f712c9SDave Chinner ip->i_d.di_nblocks--; 68630f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); 68730f712c9SDave Chinner xfs_trans_binval(tp, cbp); 68830f712c9SDave Chinner if (cur->bc_bufs[0] == cbp) 68930f712c9SDave Chinner cur->bc_bufs[0] = NULL; 69030f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 69130f712c9SDave Chinner ASSERT(ifp->if_broot == NULL); 69230f712c9SDave Chinner ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); 69330f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); 69430f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 69530f712c9SDave Chinner return 0; 69630f712c9SDave Chinner } 69730f712c9SDave Chinner 69830f712c9SDave Chinner /* 69930f712c9SDave Chinner * Convert an extents-format file into a btree-format file. 70030f712c9SDave Chinner * The new file will have a root block (in the inode) and a single child block. 70130f712c9SDave Chinner */ 70230f712c9SDave Chinner STATIC int /* error */ 70330f712c9SDave Chinner xfs_bmap_extents_to_btree( 70430f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 70530f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 70630f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first-block-allocated */ 7072c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks freed in xaction */ 70830f712c9SDave Chinner xfs_btree_cur_t **curp, /* cursor returned to caller */ 70930f712c9SDave Chinner int wasdel, /* converting a delayed alloc */ 71030f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 71130f712c9SDave Chinner int whichfork) /* data or attr fork */ 71230f712c9SDave Chinner { 71330f712c9SDave Chinner struct xfs_btree_block *ablock; /* allocated (child) bt block */ 71430f712c9SDave Chinner xfs_buf_t *abp; /* buffer for ablock */ 71530f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 71630f712c9SDave Chinner xfs_bmbt_rec_t *arp; /* child record pointer */ 71730f712c9SDave Chinner struct xfs_btree_block *block; /* btree root block */ 71830f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 71930f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* extent record pointer */ 72030f712c9SDave Chinner int error; /* error return value */ 72130f712c9SDave Chinner xfs_extnum_t i, cnt; /* extent record index */ 72230f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 72330f712c9SDave Chinner xfs_bmbt_key_t *kp; /* root block key pointer */ 72430f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 72530f712c9SDave Chinner xfs_extnum_t nextents; /* number of file extents */ 72630f712c9SDave Chinner xfs_bmbt_ptr_t *pp; /* root block address pointer */ 72730f712c9SDave Chinner 72830f712c9SDave Chinner mp = ip->i_mount; 72960b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 73030f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 73130f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); 73230f712c9SDave Chinner 73330f712c9SDave Chinner /* 73430f712c9SDave Chinner * Make space in the inode incore. 73530f712c9SDave Chinner */ 73630f712c9SDave Chinner xfs_iroot_realloc(ip, 1, whichfork); 73730f712c9SDave Chinner ifp->if_flags |= XFS_IFBROOT; 73830f712c9SDave Chinner 73930f712c9SDave Chinner /* 74030f712c9SDave Chinner * Fill in the root. 74130f712c9SDave Chinner */ 74230f712c9SDave Chinner block = ifp->if_broot; 74330f712c9SDave Chinner xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, 744b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 1, 1, ip->i_ino, 745f88ae46bSEric Sandeen XFS_BTREE_LONG_PTRS); 74630f712c9SDave Chinner /* 74730f712c9SDave Chinner * Need a cursor. Can't allocate until bb_level is filled in. 74830f712c9SDave Chinner */ 74930f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 75030f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 7512c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 75230f712c9SDave Chinner cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; 75330f712c9SDave Chinner /* 75430f712c9SDave Chinner * Convert to a btree with two levels, one record in root. 75530f712c9SDave Chinner */ 75630f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); 75730f712c9SDave Chinner memset(&args, 0, sizeof(args)); 75830f712c9SDave Chinner args.tp = tp; 75930f712c9SDave Chinner args.mp = mp; 760340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); 76130f712c9SDave Chinner args.firstblock = *firstblock; 76230f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 76330f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 76430f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); 7652c3234d1SDarrick J. Wong } else if (dfops->dop_low) { 76630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 7672fcc319dSChristoph Hellwig try_another_ag: 76830f712c9SDave Chinner args.fsbno = *firstblock; 76930f712c9SDave Chinner } else { 77030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 77130f712c9SDave Chinner args.fsbno = *firstblock; 77230f712c9SDave Chinner } 77330f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 77430f712c9SDave Chinner args.wasdel = wasdel; 77530f712c9SDave Chinner *logflagsp = 0; 77630f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) { 77730f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 77830f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 77930f712c9SDave Chinner return error; 78030f712c9SDave Chinner } 78190e2056dSDarrick J. Wong 78290e2056dSDarrick J. Wong /* 78390e2056dSDarrick J. Wong * During a CoW operation, the allocation and bmbt updates occur in 78490e2056dSDarrick J. Wong * different transactions. The mapping code tries to put new bmbt 78590e2056dSDarrick J. Wong * blocks near extents being mapped, but the only way to guarantee this 78690e2056dSDarrick J. Wong * is if the alloc and the mapping happen in a single transaction that 78790e2056dSDarrick J. Wong * has a block reservation. That isn't the case here, so if we run out 78890e2056dSDarrick J. Wong * of space we'll try again with another AG. 78990e2056dSDarrick J. Wong */ 79090e2056dSDarrick J. Wong if (xfs_sb_version_hasreflink(&cur->bc_mp->m_sb) && 79190e2056dSDarrick J. Wong args.fsbno == NULLFSBLOCK && 79290e2056dSDarrick J. Wong args.type == XFS_ALLOCTYPE_NEAR_BNO) { 7932fcc319dSChristoph Hellwig args.type = XFS_ALLOCTYPE_FIRST_AG; 79490e2056dSDarrick J. Wong goto try_another_ag; 79590e2056dSDarrick J. Wong } 7962fcc319dSChristoph Hellwig if (WARN_ON_ONCE(args.fsbno == NULLFSBLOCK)) { 7972fcc319dSChristoph Hellwig xfs_iroot_realloc(ip, -1, whichfork); 7982fcc319dSChristoph Hellwig xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 7992fcc319dSChristoph Hellwig return -ENOSPC; 8002fcc319dSChristoph Hellwig } 80130f712c9SDave Chinner /* 80230f712c9SDave Chinner * Allocation can't fail, the space was reserved. 80330f712c9SDave Chinner */ 80430f712c9SDave Chinner ASSERT(*firstblock == NULLFSBLOCK || 805410d17f6SChristoph Hellwig args.agno >= XFS_FSB_TO_AGNO(mp, *firstblock)); 80630f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock = args.fsbno; 80730f712c9SDave Chinner cur->bc_private.b.allocated++; 80830f712c9SDave Chinner ip->i_d.di_nblocks++; 80930f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); 81030f712c9SDave Chinner abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); 81130f712c9SDave Chinner /* 81230f712c9SDave Chinner * Fill in the child block. 81330f712c9SDave Chinner */ 81430f712c9SDave Chinner abp->b_ops = &xfs_bmbt_buf_ops; 81530f712c9SDave Chinner ablock = XFS_BUF_TO_BLOCK(abp); 81630f712c9SDave Chinner xfs_btree_init_block_int(mp, ablock, abp->b_bn, 817b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 0, 0, ip->i_ino, 81830f712c9SDave Chinner XFS_BTREE_LONG_PTRS); 81930f712c9SDave Chinner 82030f712c9SDave Chinner arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); 8215d829300SEric Sandeen nextents = xfs_iext_count(ifp); 82230f712c9SDave Chinner for (cnt = i = 0; i < nextents; i++) { 82330f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, i); 82430f712c9SDave Chinner if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { 82530f712c9SDave Chinner arp->l0 = cpu_to_be64(ep->l0); 82630f712c9SDave Chinner arp->l1 = cpu_to_be64(ep->l1); 82730f712c9SDave Chinner arp++; cnt++; 82830f712c9SDave Chinner } 82930f712c9SDave Chinner } 83030f712c9SDave Chinner ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); 83130f712c9SDave Chinner xfs_btree_set_numrecs(ablock, cnt); 83230f712c9SDave Chinner 83330f712c9SDave Chinner /* 83430f712c9SDave Chinner * Fill in the root key and pointer. 83530f712c9SDave Chinner */ 83630f712c9SDave Chinner kp = XFS_BMBT_KEY_ADDR(mp, block, 1); 83730f712c9SDave Chinner arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); 83830f712c9SDave Chinner kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); 83930f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, 84030f712c9SDave Chinner be16_to_cpu(block->bb_level))); 84130f712c9SDave Chinner *pp = cpu_to_be64(args.fsbno); 84230f712c9SDave Chinner 84330f712c9SDave Chinner /* 84430f712c9SDave Chinner * Do all this logging at the end so that 84530f712c9SDave Chinner * the root is at the right level. 84630f712c9SDave Chinner */ 84730f712c9SDave Chinner xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); 84830f712c9SDave Chinner xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); 84930f712c9SDave Chinner ASSERT(*curp == NULL); 85030f712c9SDave Chinner *curp = cur; 85130f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); 85230f712c9SDave Chinner return 0; 85330f712c9SDave Chinner } 85430f712c9SDave Chinner 85530f712c9SDave Chinner /* 85630f712c9SDave Chinner * Convert a local file to an extents file. 85730f712c9SDave Chinner * This code is out of bounds for data forks of regular files, 85830f712c9SDave Chinner * since the file data needs to get logged so things will stay consistent. 85930f712c9SDave Chinner * (The bmap-level manipulations are ok, though). 86030f712c9SDave Chinner */ 86130f712c9SDave Chinner void 86230f712c9SDave Chinner xfs_bmap_local_to_extents_empty( 86330f712c9SDave Chinner struct xfs_inode *ip, 86430f712c9SDave Chinner int whichfork) 86530f712c9SDave Chinner { 86630f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 86730f712c9SDave Chinner 86860b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 86930f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 87030f712c9SDave Chinner ASSERT(ifp->if_bytes == 0); 87130f712c9SDave Chinner ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); 87230f712c9SDave Chinner 87330f712c9SDave Chinner xfs_bmap_forkoff_reset(ip, whichfork); 87430f712c9SDave Chinner ifp->if_flags &= ~XFS_IFINLINE; 87530f712c9SDave Chinner ifp->if_flags |= XFS_IFEXTENTS; 87630f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); 87730f712c9SDave Chinner } 87830f712c9SDave Chinner 87930f712c9SDave Chinner 88030f712c9SDave Chinner STATIC int /* error */ 88130f712c9SDave Chinner xfs_bmap_local_to_extents( 88230f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 88330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 88430f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated in xaction */ 88530f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed by transaction */ 88630f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 88730f712c9SDave Chinner int whichfork, 88830f712c9SDave Chinner void (*init_fn)(struct xfs_trans *tp, 88930f712c9SDave Chinner struct xfs_buf *bp, 89030f712c9SDave Chinner struct xfs_inode *ip, 89130f712c9SDave Chinner struct xfs_ifork *ifp)) 89230f712c9SDave Chinner { 89330f712c9SDave Chinner int error = 0; 89430f712c9SDave Chinner int flags; /* logging flags returned */ 89530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 89630f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 89730f712c9SDave Chinner xfs_buf_t *bp; /* buffer for extent block */ 89830f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* extent record pointer */ 89930f712c9SDave Chinner 90030f712c9SDave Chinner /* 90130f712c9SDave Chinner * We don't want to deal with the case of keeping inode data inline yet. 90230f712c9SDave Chinner * So sending the data fork of a regular inode is invalid. 90330f712c9SDave Chinner */ 904c19b3b05SDave Chinner ASSERT(!(S_ISREG(VFS_I(ip)->i_mode) && whichfork == XFS_DATA_FORK)); 90530f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 90630f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 90730f712c9SDave Chinner 90830f712c9SDave Chinner if (!ifp->if_bytes) { 90930f712c9SDave Chinner xfs_bmap_local_to_extents_empty(ip, whichfork); 91030f712c9SDave Chinner flags = XFS_ILOG_CORE; 91130f712c9SDave Chinner goto done; 91230f712c9SDave Chinner } 91330f712c9SDave Chinner 91430f712c9SDave Chinner flags = 0; 91530f712c9SDave Chinner error = 0; 91630f712c9SDave Chinner ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == 91730f712c9SDave Chinner XFS_IFINLINE); 91830f712c9SDave Chinner memset(&args, 0, sizeof(args)); 91930f712c9SDave Chinner args.tp = tp; 92030f712c9SDave Chinner args.mp = ip->i_mount; 921340785ccSDarrick J. Wong xfs_rmap_ino_owner(&args.oinfo, ip->i_ino, whichfork, 0); 92230f712c9SDave Chinner args.firstblock = *firstblock; 92330f712c9SDave Chinner /* 92430f712c9SDave Chinner * Allocate a block. We know we need only one, since the 92530f712c9SDave Chinner * file currently fits in an inode. 92630f712c9SDave Chinner */ 92730f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 92890e2056dSDarrick J. Wong try_another_ag: 92930f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); 93030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 93130f712c9SDave Chinner } else { 93230f712c9SDave Chinner args.fsbno = *firstblock; 93330f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 93430f712c9SDave Chinner } 93530f712c9SDave Chinner args.total = total; 93630f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 93730f712c9SDave Chinner error = xfs_alloc_vextent(&args); 93830f712c9SDave Chinner if (error) 93930f712c9SDave Chinner goto done; 94030f712c9SDave Chinner 94190e2056dSDarrick J. Wong /* 94290e2056dSDarrick J. Wong * During a CoW operation, the allocation and bmbt updates occur in 94390e2056dSDarrick J. Wong * different transactions. The mapping code tries to put new bmbt 94490e2056dSDarrick J. Wong * blocks near extents being mapped, but the only way to guarantee this 94590e2056dSDarrick J. Wong * is if the alloc and the mapping happen in a single transaction that 94690e2056dSDarrick J. Wong * has a block reservation. That isn't the case here, so if we run out 94790e2056dSDarrick J. Wong * of space we'll try again with another AG. 94890e2056dSDarrick J. Wong */ 94990e2056dSDarrick J. Wong if (xfs_sb_version_hasreflink(&ip->i_mount->m_sb) && 95090e2056dSDarrick J. Wong args.fsbno == NULLFSBLOCK && 95190e2056dSDarrick J. Wong args.type == XFS_ALLOCTYPE_NEAR_BNO) { 95290e2056dSDarrick J. Wong goto try_another_ag; 95390e2056dSDarrick J. Wong } 95430f712c9SDave Chinner /* Can't fail, the space was reserved. */ 95530f712c9SDave Chinner ASSERT(args.fsbno != NULLFSBLOCK); 95630f712c9SDave Chinner ASSERT(args.len == 1); 95730f712c9SDave Chinner *firstblock = args.fsbno; 95830f712c9SDave Chinner bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); 95930f712c9SDave Chinner 960fe22d552SDave Chinner /* 961b7cdc66bSBrian Foster * Initialize the block, copy the data and log the remote buffer. 962fe22d552SDave Chinner * 963b7cdc66bSBrian Foster * The callout is responsible for logging because the remote format 964b7cdc66bSBrian Foster * might differ from the local format and thus we don't know how much to 965b7cdc66bSBrian Foster * log here. Note that init_fn must also set the buffer log item type 966b7cdc66bSBrian Foster * correctly. 967fe22d552SDave Chinner */ 96830f712c9SDave Chinner init_fn(tp, bp, ip, ifp); 96930f712c9SDave Chinner 970b7cdc66bSBrian Foster /* account for the change in fork size */ 97130f712c9SDave Chinner xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); 97230f712c9SDave Chinner xfs_bmap_local_to_extents_empty(ip, whichfork); 97330f712c9SDave Chinner flags |= XFS_ILOG_CORE; 97430f712c9SDave Chinner 97530f712c9SDave Chinner xfs_iext_add(ifp, 0, 1); 97630f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, 0); 97730f712c9SDave Chinner xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); 97830f712c9SDave Chinner trace_xfs_bmap_post_update(ip, 0, 97930f712c9SDave Chinner whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, 98030f712c9SDave Chinner _THIS_IP_); 98130f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 1); 98230f712c9SDave Chinner ip->i_d.di_nblocks = 1; 98330f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, 98430f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 1L); 98530f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 98630f712c9SDave Chinner 98730f712c9SDave Chinner done: 98830f712c9SDave Chinner *logflagsp = flags; 98930f712c9SDave Chinner return error; 99030f712c9SDave Chinner } 99130f712c9SDave Chinner 99230f712c9SDave Chinner /* 99330f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle btree format files. 99430f712c9SDave Chinner */ 99530f712c9SDave Chinner STATIC int /* error */ 99630f712c9SDave Chinner xfs_bmap_add_attrfork_btree( 99730f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 99830f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 99930f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 10002c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 100130f712c9SDave Chinner int *flags) /* inode logging flags */ 100230f712c9SDave Chinner { 100330f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 100430f712c9SDave Chinner int error; /* error return value */ 100530f712c9SDave Chinner xfs_mount_t *mp; /* file system mount struct */ 100630f712c9SDave Chinner int stat; /* newroot status */ 100730f712c9SDave Chinner 100830f712c9SDave Chinner mp = ip->i_mount; 100930f712c9SDave Chinner if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) 101030f712c9SDave Chinner *flags |= XFS_ILOG_DBROOT; 101130f712c9SDave Chinner else { 101230f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); 10132c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 101430f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 101530f712c9SDave Chinner if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) 101630f712c9SDave Chinner goto error0; 101730f712c9SDave Chinner /* must be at least one entry */ 1018c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, stat == 1, error0); 101930f712c9SDave Chinner if ((error = xfs_btree_new_iroot(cur, flags, &stat))) 102030f712c9SDave Chinner goto error0; 102130f712c9SDave Chinner if (stat == 0) { 102230f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 10232451337dSDave Chinner return -ENOSPC; 102430f712c9SDave Chinner } 102530f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock; 102630f712c9SDave Chinner cur->bc_private.b.allocated = 0; 102730f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 102830f712c9SDave Chinner } 102930f712c9SDave Chinner return 0; 103030f712c9SDave Chinner error0: 103130f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 103230f712c9SDave Chinner return error; 103330f712c9SDave Chinner } 103430f712c9SDave Chinner 103530f712c9SDave Chinner /* 103630f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle extents format files. 103730f712c9SDave Chinner */ 103830f712c9SDave Chinner STATIC int /* error */ 103930f712c9SDave Chinner xfs_bmap_add_attrfork_extents( 104030f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 104130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 104230f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 10432c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 104430f712c9SDave Chinner int *flags) /* inode logging flags */ 104530f712c9SDave Chinner { 104630f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 104730f712c9SDave Chinner int error; /* error return value */ 104830f712c9SDave Chinner 104930f712c9SDave Chinner if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) 105030f712c9SDave Chinner return 0; 105130f712c9SDave Chinner cur = NULL; 10522c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, &cur, 0, 105330f712c9SDave Chinner flags, XFS_DATA_FORK); 105430f712c9SDave Chinner if (cur) { 105530f712c9SDave Chinner cur->bc_private.b.allocated = 0; 105630f712c9SDave Chinner xfs_btree_del_cursor(cur, 105730f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 105830f712c9SDave Chinner } 105930f712c9SDave Chinner return error; 106030f712c9SDave Chinner } 106130f712c9SDave Chinner 106230f712c9SDave Chinner /* 106330f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle local format files. Each 106430f712c9SDave Chinner * different data fork content type needs a different callout to do the 106530f712c9SDave Chinner * conversion. Some are basic and only require special block initialisation 106630f712c9SDave Chinner * callouts for the data formating, others (directories) are so specialised they 106730f712c9SDave Chinner * handle everything themselves. 106830f712c9SDave Chinner * 106930f712c9SDave Chinner * XXX (dgc): investigate whether directory conversion can use the generic 107030f712c9SDave Chinner * formatting callout. It should be possible - it's just a very complex 107130f712c9SDave Chinner * formatter. 107230f712c9SDave Chinner */ 107330f712c9SDave Chinner STATIC int /* error */ 107430f712c9SDave Chinner xfs_bmap_add_attrfork_local( 107530f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 107630f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 107730f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 10782c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 107930f712c9SDave Chinner int *flags) /* inode logging flags */ 108030f712c9SDave Chinner { 108130f712c9SDave Chinner xfs_da_args_t dargs; /* args for dir/attr code */ 108230f712c9SDave Chinner 108330f712c9SDave Chinner if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) 108430f712c9SDave Chinner return 0; 108530f712c9SDave Chinner 1086c19b3b05SDave Chinner if (S_ISDIR(VFS_I(ip)->i_mode)) { 108730f712c9SDave Chinner memset(&dargs, 0, sizeof(dargs)); 108830f712c9SDave Chinner dargs.geo = ip->i_mount->m_dir_geo; 108930f712c9SDave Chinner dargs.dp = ip; 109030f712c9SDave Chinner dargs.firstblock = firstblock; 10912c3234d1SDarrick J. Wong dargs.dfops = dfops; 109230f712c9SDave Chinner dargs.total = dargs.geo->fsbcount; 109330f712c9SDave Chinner dargs.whichfork = XFS_DATA_FORK; 109430f712c9SDave Chinner dargs.trans = tp; 109530f712c9SDave Chinner return xfs_dir2_sf_to_block(&dargs); 109630f712c9SDave Chinner } 109730f712c9SDave Chinner 1098c19b3b05SDave Chinner if (S_ISLNK(VFS_I(ip)->i_mode)) 109930f712c9SDave Chinner return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, 110030f712c9SDave Chinner flags, XFS_DATA_FORK, 110130f712c9SDave Chinner xfs_symlink_local_to_remote); 110230f712c9SDave Chinner 110330f712c9SDave Chinner /* should only be called for types that support local format data */ 110430f712c9SDave Chinner ASSERT(0); 11052451337dSDave Chinner return -EFSCORRUPTED; 110630f712c9SDave Chinner } 110730f712c9SDave Chinner 110830f712c9SDave Chinner /* 110930f712c9SDave Chinner * Convert inode from non-attributed to attributed. 111030f712c9SDave Chinner * Must not be in a transaction, ip must not be locked. 111130f712c9SDave Chinner */ 111230f712c9SDave Chinner int /* error code */ 111330f712c9SDave Chinner xfs_bmap_add_attrfork( 111430f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 111530f712c9SDave Chinner int size, /* space new attribute needs */ 111630f712c9SDave Chinner int rsvd) /* xact may use reserved blks */ 111730f712c9SDave Chinner { 111830f712c9SDave Chinner xfs_fsblock_t firstblock; /* 1st block/ag allocated */ 11192c3234d1SDarrick J. Wong struct xfs_defer_ops dfops; /* freed extent records */ 112030f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 112130f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 112230f712c9SDave Chinner int blks; /* space reservation */ 112330f712c9SDave Chinner int version = 1; /* superblock attr version */ 112430f712c9SDave Chinner int logflags; /* logging flags */ 112530f712c9SDave Chinner int error; /* error return value */ 112630f712c9SDave Chinner 112730f712c9SDave Chinner ASSERT(XFS_IFORK_Q(ip) == 0); 112830f712c9SDave Chinner 112930f712c9SDave Chinner mp = ip->i_mount; 113030f712c9SDave Chinner ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); 1131253f4911SChristoph Hellwig 113230f712c9SDave Chinner blks = XFS_ADDAFORK_SPACE_RES(mp); 1133253f4911SChristoph Hellwig 1134253f4911SChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_addafork, blks, 0, 1135253f4911SChristoph Hellwig rsvd ? XFS_TRANS_RESERVE : 0, &tp); 1136253f4911SChristoph Hellwig if (error) 113730f712c9SDave Chinner return error; 1138253f4911SChristoph Hellwig 113930f712c9SDave Chinner xfs_ilock(ip, XFS_ILOCK_EXCL); 114030f712c9SDave Chinner error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? 114130f712c9SDave Chinner XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : 114230f712c9SDave Chinner XFS_QMOPT_RES_REGBLKS); 114330f712c9SDave Chinner if (error) 114430f712c9SDave Chinner goto trans_cancel; 114530f712c9SDave Chinner if (XFS_IFORK_Q(ip)) 114630f712c9SDave Chinner goto trans_cancel; 11470f352f8eSDarrick J. Wong if (ip->i_d.di_anextents != 0) { 11480f352f8eSDarrick J. Wong error = -EFSCORRUPTED; 11490f352f8eSDarrick J. Wong goto trans_cancel; 11500f352f8eSDarrick J. Wong } 115130f712c9SDave Chinner if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { 115230f712c9SDave Chinner /* 115330f712c9SDave Chinner * For inodes coming from pre-6.2 filesystems. 115430f712c9SDave Chinner */ 115530f712c9SDave Chinner ASSERT(ip->i_d.di_aformat == 0); 115630f712c9SDave Chinner ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; 115730f712c9SDave Chinner } 115830f712c9SDave Chinner 115930f712c9SDave Chinner xfs_trans_ijoin(tp, ip, 0); 116030f712c9SDave Chinner xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 116130f712c9SDave Chinner 116230f712c9SDave Chinner switch (ip->i_d.di_format) { 116330f712c9SDave Chinner case XFS_DINODE_FMT_DEV: 116430f712c9SDave Chinner ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; 116530f712c9SDave Chinner break; 116630f712c9SDave Chinner case XFS_DINODE_FMT_UUID: 116730f712c9SDave Chinner ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; 116830f712c9SDave Chinner break; 116930f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 117030f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 117130f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 117230f712c9SDave Chinner ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); 117330f712c9SDave Chinner if (!ip->i_d.di_forkoff) 117430f712c9SDave Chinner ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; 117530f712c9SDave Chinner else if (mp->m_flags & XFS_MOUNT_ATTR2) 117630f712c9SDave Chinner version = 2; 117730f712c9SDave Chinner break; 117830f712c9SDave Chinner default: 117930f712c9SDave Chinner ASSERT(0); 11802451337dSDave Chinner error = -EINVAL; 118130f712c9SDave Chinner goto trans_cancel; 118230f712c9SDave Chinner } 118330f712c9SDave Chinner 118430f712c9SDave Chinner ASSERT(ip->i_afp == NULL); 118530f712c9SDave Chinner ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); 118630f712c9SDave Chinner ip->i_afp->if_flags = XFS_IFEXTENTS; 118730f712c9SDave Chinner logflags = 0; 11882c3234d1SDarrick J. Wong xfs_defer_init(&dfops, &firstblock); 118930f712c9SDave Chinner switch (ip->i_d.di_format) { 119030f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 11912c3234d1SDarrick J. Wong error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &dfops, 119230f712c9SDave Chinner &logflags); 119330f712c9SDave Chinner break; 119430f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 119530f712c9SDave Chinner error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, 11962c3234d1SDarrick J. Wong &dfops, &logflags); 119730f712c9SDave Chinner break; 119830f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 11992c3234d1SDarrick J. Wong error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &dfops, 120030f712c9SDave Chinner &logflags); 120130f712c9SDave Chinner break; 120230f712c9SDave Chinner default: 120330f712c9SDave Chinner error = 0; 120430f712c9SDave Chinner break; 120530f712c9SDave Chinner } 120630f712c9SDave Chinner if (logflags) 120730f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 120830f712c9SDave Chinner if (error) 120930f712c9SDave Chinner goto bmap_cancel; 121030f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb) || 121130f712c9SDave Chinner (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { 121261e63ecbSDave Chinner bool log_sb = false; 121330f712c9SDave Chinner 121430f712c9SDave Chinner spin_lock(&mp->m_sb_lock); 121530f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb)) { 121630f712c9SDave Chinner xfs_sb_version_addattr(&mp->m_sb); 121761e63ecbSDave Chinner log_sb = true; 121830f712c9SDave Chinner } 121930f712c9SDave Chinner if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { 122030f712c9SDave Chinner xfs_sb_version_addattr2(&mp->m_sb); 122161e63ecbSDave Chinner log_sb = true; 122230f712c9SDave Chinner } 122330f712c9SDave Chinner spin_unlock(&mp->m_sb_lock); 122461e63ecbSDave Chinner if (log_sb) 122561e63ecbSDave Chinner xfs_log_sb(tp); 122630f712c9SDave Chinner } 122730f712c9SDave Chinner 12282c3234d1SDarrick J. Wong error = xfs_defer_finish(&tp, &dfops, NULL); 122930f712c9SDave Chinner if (error) 123030f712c9SDave Chinner goto bmap_cancel; 123170393313SChristoph Hellwig error = xfs_trans_commit(tp); 123230f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 123330f712c9SDave Chinner return error; 123430f712c9SDave Chinner 123530f712c9SDave Chinner bmap_cancel: 12362c3234d1SDarrick J. Wong xfs_defer_cancel(&dfops); 123730f712c9SDave Chinner trans_cancel: 12384906e215SChristoph Hellwig xfs_trans_cancel(tp); 123930f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 124030f712c9SDave Chinner return error; 124130f712c9SDave Chinner } 124230f712c9SDave Chinner 124330f712c9SDave Chinner /* 124430f712c9SDave Chinner * Internal and external extent tree search functions. 124530f712c9SDave Chinner */ 124630f712c9SDave Chinner 124730f712c9SDave Chinner /* 124830f712c9SDave Chinner * Read in the extents to if_extents. 124930f712c9SDave Chinner * All inode fields are set up by caller, we just traverse the btree 125030f712c9SDave Chinner * and copy the records in. If the file system cannot contain unwritten 125130f712c9SDave Chinner * extents, the records are checked for no "state" flags. 125230f712c9SDave Chinner */ 125330f712c9SDave Chinner int /* error */ 125430f712c9SDave Chinner xfs_bmap_read_extents( 125530f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 125630f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 125730f712c9SDave Chinner int whichfork) /* data or attr fork */ 125830f712c9SDave Chinner { 125930f712c9SDave Chinner struct xfs_btree_block *block; /* current btree block */ 126030f712c9SDave Chinner xfs_fsblock_t bno; /* block # of "block" */ 126130f712c9SDave Chinner xfs_buf_t *bp; /* buffer for "block" */ 126230f712c9SDave Chinner int error; /* error return value */ 126330f712c9SDave Chinner xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ 126430f712c9SDave Chinner xfs_extnum_t i, j; /* index into the extents list */ 126530f712c9SDave Chinner xfs_ifork_t *ifp; /* fork structure */ 126630f712c9SDave Chinner int level; /* btree level, for checking */ 126730f712c9SDave Chinner xfs_mount_t *mp; /* file system mount structure */ 126830f712c9SDave Chinner __be64 *pp; /* pointer to block address */ 126930f712c9SDave Chinner /* REFERENCED */ 127030f712c9SDave Chinner xfs_extnum_t room; /* number of entries there's room for */ 127130f712c9SDave Chinner 127230f712c9SDave Chinner mp = ip->i_mount; 127330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 127430f712c9SDave Chinner exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : 127530f712c9SDave Chinner XFS_EXTFMT_INODE(ip); 127630f712c9SDave Chinner block = ifp->if_broot; 127730f712c9SDave Chinner /* 127830f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 127930f712c9SDave Chinner */ 128030f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 128130f712c9SDave Chinner ASSERT(level > 0); 128230f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 128330f712c9SDave Chinner bno = be64_to_cpu(*pp); 1284d5a91baeSDarrick J. Wong 128530f712c9SDave Chinner /* 128630f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 128730f712c9SDave Chinner * pointer (leftmost) at each level. 128830f712c9SDave Chinner */ 128930f712c9SDave Chinner while (level-- > 0) { 129030f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, 129130f712c9SDave Chinner XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); 129230f712c9SDave Chinner if (error) 129330f712c9SDave Chinner return error; 129430f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 129530f712c9SDave Chinner if (level == 0) 129630f712c9SDave Chinner break; 129730f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 129830f712c9SDave Chinner bno = be64_to_cpu(*pp); 1299c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 1300c29aad41SEric Sandeen XFS_FSB_SANITY_CHECK(mp, bno), error0); 130130f712c9SDave Chinner xfs_trans_brelse(tp, bp); 130230f712c9SDave Chinner } 130330f712c9SDave Chinner /* 130430f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 130530f712c9SDave Chinner */ 13065d829300SEric Sandeen room = xfs_iext_count(ifp); 130730f712c9SDave Chinner i = 0; 130830f712c9SDave Chinner /* 130930f712c9SDave Chinner * Loop over all leaf nodes. Copy information to the extent records. 131030f712c9SDave Chinner */ 131130f712c9SDave Chinner for (;;) { 131230f712c9SDave Chinner xfs_bmbt_rec_t *frp; 131330f712c9SDave Chinner xfs_fsblock_t nextbno; 131430f712c9SDave Chinner xfs_extnum_t num_recs; 131530f712c9SDave Chinner xfs_extnum_t start; 131630f712c9SDave Chinner 131730f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 131830f712c9SDave Chinner if (unlikely(i + num_recs > room)) { 131930f712c9SDave Chinner ASSERT(i + num_recs <= room); 132030f712c9SDave Chinner xfs_warn(ip->i_mount, 132130f712c9SDave Chinner "corrupt dinode %Lu, (btree extents).", 132230f712c9SDave Chinner (unsigned long long) ip->i_ino); 132330f712c9SDave Chinner XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)", 132430f712c9SDave Chinner XFS_ERRLEVEL_LOW, ip->i_mount, block); 132530f712c9SDave Chinner goto error0; 132630f712c9SDave Chinner } 132730f712c9SDave Chinner /* 132830f712c9SDave Chinner * Read-ahead the next leaf block, if any. 132930f712c9SDave Chinner */ 133030f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 133130f712c9SDave Chinner if (nextbno != NULLFSBLOCK) 133230f712c9SDave Chinner xfs_btree_reada_bufl(mp, nextbno, 1, 133330f712c9SDave Chinner &xfs_bmbt_buf_ops); 133430f712c9SDave Chinner /* 133530f712c9SDave Chinner * Copy records into the extent records. 133630f712c9SDave Chinner */ 133730f712c9SDave Chinner frp = XFS_BMBT_REC_ADDR(mp, block, 1); 133830f712c9SDave Chinner start = i; 133930f712c9SDave Chinner for (j = 0; j < num_recs; j++, i++, frp++) { 134030f712c9SDave Chinner xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); 134130f712c9SDave Chinner trp->l0 = be64_to_cpu(frp->l0); 134230f712c9SDave Chinner trp->l1 = be64_to_cpu(frp->l1); 134330f712c9SDave Chinner } 134430f712c9SDave Chinner if (exntf == XFS_EXTFMT_NOSTATE) { 134530f712c9SDave Chinner /* 134630f712c9SDave Chinner * Check all attribute bmap btree records and 134730f712c9SDave Chinner * any "older" data bmap btree records for a 134830f712c9SDave Chinner * set bit in the "extent flag" position. 134930f712c9SDave Chinner */ 135030f712c9SDave Chinner if (unlikely(xfs_check_nostate_extents(ifp, 135130f712c9SDave Chinner start, num_recs))) { 135230f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", 135330f712c9SDave Chinner XFS_ERRLEVEL_LOW, 135430f712c9SDave Chinner ip->i_mount); 135530f712c9SDave Chinner goto error0; 135630f712c9SDave Chinner } 135730f712c9SDave Chinner } 135830f712c9SDave Chinner xfs_trans_brelse(tp, bp); 135930f712c9SDave Chinner bno = nextbno; 136030f712c9SDave Chinner /* 136130f712c9SDave Chinner * If we've reached the end, stop. 136230f712c9SDave Chinner */ 136330f712c9SDave Chinner if (bno == NULLFSBLOCK) 136430f712c9SDave Chinner break; 136530f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, 136630f712c9SDave Chinner XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); 136730f712c9SDave Chinner if (error) 136830f712c9SDave Chinner return error; 136930f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 137030f712c9SDave Chinner } 1371356a3225SDarrick J. Wong if (i != XFS_IFORK_NEXTENTS(ip, whichfork)) 1372356a3225SDarrick J. Wong return -EFSCORRUPTED; 13735d829300SEric Sandeen ASSERT(i == xfs_iext_count(ifp)); 137430f712c9SDave Chinner XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); 137530f712c9SDave Chinner return 0; 137630f712c9SDave Chinner error0: 137730f712c9SDave Chinner xfs_trans_brelse(tp, bp); 13782451337dSDave Chinner return -EFSCORRUPTED; 137930f712c9SDave Chinner } 138030f712c9SDave Chinner 138130f712c9SDave Chinner /* 138230f712c9SDave Chinner * Returns the file-relative block number of the first unused block(s) 138330f712c9SDave Chinner * in the file with at least "len" logically contiguous blocks free. 138430f712c9SDave Chinner * This is the lowest-address hole if the file has holes, else the first block 138530f712c9SDave Chinner * past the end of file. 138630f712c9SDave Chinner * Return 0 if the file is currently local (in-inode). 138730f712c9SDave Chinner */ 138830f712c9SDave Chinner int /* error */ 138930f712c9SDave Chinner xfs_bmap_first_unused( 139030f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 139130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 139230f712c9SDave Chinner xfs_extlen_t len, /* size of hole to find */ 139330f712c9SDave Chinner xfs_fileoff_t *first_unused, /* unused block */ 139430f712c9SDave Chinner int whichfork) /* data or attr fork */ 139530f712c9SDave Chinner { 139630f712c9SDave Chinner int error; /* error return value */ 139730f712c9SDave Chinner int idx; /* extent record index */ 139830f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 139930f712c9SDave Chinner xfs_fileoff_t lastaddr; /* last block number seen */ 140030f712c9SDave Chinner xfs_fileoff_t lowest; /* lowest useful block */ 140130f712c9SDave Chinner xfs_fileoff_t max; /* starting useful block */ 140230f712c9SDave Chinner xfs_fileoff_t off; /* offset for this block */ 140330f712c9SDave Chinner xfs_extnum_t nextents; /* number of extent entries */ 140430f712c9SDave Chinner 140530f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || 140630f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || 140730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 140830f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { 140930f712c9SDave Chinner *first_unused = 0; 141030f712c9SDave Chinner return 0; 141130f712c9SDave Chinner } 141230f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 141330f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS) && 141430f712c9SDave Chinner (error = xfs_iread_extents(tp, ip, whichfork))) 141530f712c9SDave Chinner return error; 141630f712c9SDave Chinner lowest = *first_unused; 14175d829300SEric Sandeen nextents = xfs_iext_count(ifp); 141830f712c9SDave Chinner for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { 141930f712c9SDave Chinner xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); 142030f712c9SDave Chinner off = xfs_bmbt_get_startoff(ep); 142130f712c9SDave Chinner /* 142230f712c9SDave Chinner * See if the hole before this extent will work. 142330f712c9SDave Chinner */ 142430f712c9SDave Chinner if (off >= lowest + len && off - max >= len) { 142530f712c9SDave Chinner *first_unused = max; 142630f712c9SDave Chinner return 0; 142730f712c9SDave Chinner } 142830f712c9SDave Chinner lastaddr = off + xfs_bmbt_get_blockcount(ep); 142930f712c9SDave Chinner max = XFS_FILEOFF_MAX(lastaddr, lowest); 143030f712c9SDave Chinner } 143130f712c9SDave Chinner *first_unused = max; 143230f712c9SDave Chinner return 0; 143330f712c9SDave Chinner } 143430f712c9SDave Chinner 143530f712c9SDave Chinner /* 143630f712c9SDave Chinner * Returns the file-relative block number of the last block - 1 before 143730f712c9SDave Chinner * last_block (input value) in the file. 143830f712c9SDave Chinner * This is not based on i_size, it is based on the extent records. 143930f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 144030f712c9SDave Chinner */ 144130f712c9SDave Chinner int /* error */ 144230f712c9SDave Chinner xfs_bmap_last_before( 144386685f7bSChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 144486685f7bSChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 144530f712c9SDave Chinner xfs_fileoff_t *last_block, /* last block */ 144630f712c9SDave Chinner int whichfork) /* data or attr fork */ 144730f712c9SDave Chinner { 144886685f7bSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 144986685f7bSChristoph Hellwig struct xfs_bmbt_irec got; 145086685f7bSChristoph Hellwig xfs_extnum_t idx; 145186685f7bSChristoph Hellwig int error; 145230f712c9SDave Chinner 145386685f7bSChristoph Hellwig switch (XFS_IFORK_FORMAT(ip, whichfork)) { 145486685f7bSChristoph Hellwig case XFS_DINODE_FMT_LOCAL: 145530f712c9SDave Chinner *last_block = 0; 145630f712c9SDave Chinner return 0; 145786685f7bSChristoph Hellwig case XFS_DINODE_FMT_BTREE: 145886685f7bSChristoph Hellwig case XFS_DINODE_FMT_EXTENTS: 145986685f7bSChristoph Hellwig break; 146086685f7bSChristoph Hellwig default: 146186685f7bSChristoph Hellwig return -EIO; 146230f712c9SDave Chinner } 146386685f7bSChristoph Hellwig 146486685f7bSChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 146586685f7bSChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 146686685f7bSChristoph Hellwig if (error) 146730f712c9SDave Chinner return error; 146830f712c9SDave Chinner } 146986685f7bSChristoph Hellwig 147086685f7bSChristoph Hellwig if (xfs_iext_lookup_extent(ip, ifp, *last_block - 1, &idx, &got)) { 147186685f7bSChristoph Hellwig if (got.br_startoff <= *last_block - 1) 147286685f7bSChristoph Hellwig return 0; 147386685f7bSChristoph Hellwig } 147486685f7bSChristoph Hellwig 147586685f7bSChristoph Hellwig if (xfs_iext_get_extent(ifp, idx - 1, &got)) { 147686685f7bSChristoph Hellwig *last_block = got.br_startoff + got.br_blockcount; 147786685f7bSChristoph Hellwig return 0; 147886685f7bSChristoph Hellwig } 147986685f7bSChristoph Hellwig 148086685f7bSChristoph Hellwig *last_block = 0; 148130f712c9SDave Chinner return 0; 148230f712c9SDave Chinner } 148330f712c9SDave Chinner 148430f712c9SDave Chinner int 148530f712c9SDave Chinner xfs_bmap_last_extent( 148630f712c9SDave Chinner struct xfs_trans *tp, 148730f712c9SDave Chinner struct xfs_inode *ip, 148830f712c9SDave Chinner int whichfork, 148930f712c9SDave Chinner struct xfs_bmbt_irec *rec, 149030f712c9SDave Chinner int *is_empty) 149130f712c9SDave Chinner { 149230f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 149330f712c9SDave Chinner int error; 149430f712c9SDave Chinner int nextents; 149530f712c9SDave Chinner 149630f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 149730f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 149830f712c9SDave Chinner if (error) 149930f712c9SDave Chinner return error; 150030f712c9SDave Chinner } 150130f712c9SDave Chinner 15025d829300SEric Sandeen nextents = xfs_iext_count(ifp); 150330f712c9SDave Chinner if (nextents == 0) { 150430f712c9SDave Chinner *is_empty = 1; 150530f712c9SDave Chinner return 0; 150630f712c9SDave Chinner } 150730f712c9SDave Chinner 150830f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec); 150930f712c9SDave Chinner *is_empty = 0; 151030f712c9SDave Chinner return 0; 151130f712c9SDave Chinner } 151230f712c9SDave Chinner 151330f712c9SDave Chinner /* 151430f712c9SDave Chinner * Check the last inode extent to determine whether this allocation will result 151530f712c9SDave Chinner * in blocks being allocated at the end of the file. When we allocate new data 151630f712c9SDave Chinner * blocks at the end of the file which do not start at the previous data block, 151730f712c9SDave Chinner * we will try to align the new blocks at stripe unit boundaries. 151830f712c9SDave Chinner * 151930f712c9SDave Chinner * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be 152030f712c9SDave Chinner * at, or past the EOF. 152130f712c9SDave Chinner */ 152230f712c9SDave Chinner STATIC int 152330f712c9SDave Chinner xfs_bmap_isaeof( 152430f712c9SDave Chinner struct xfs_bmalloca *bma, 152530f712c9SDave Chinner int whichfork) 152630f712c9SDave Chinner { 152730f712c9SDave Chinner struct xfs_bmbt_irec rec; 152830f712c9SDave Chinner int is_empty; 152930f712c9SDave Chinner int error; 153030f712c9SDave Chinner 153130f712c9SDave Chinner bma->aeof = 0; 153230f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, 153330f712c9SDave Chinner &is_empty); 153430f712c9SDave Chinner if (error) 153530f712c9SDave Chinner return error; 153630f712c9SDave Chinner 153730f712c9SDave Chinner if (is_empty) { 153830f712c9SDave Chinner bma->aeof = 1; 153930f712c9SDave Chinner return 0; 154030f712c9SDave Chinner } 154130f712c9SDave Chinner 154230f712c9SDave Chinner /* 154330f712c9SDave Chinner * Check if we are allocation or past the last extent, or at least into 154430f712c9SDave Chinner * the last delayed allocated extent. 154530f712c9SDave Chinner */ 154630f712c9SDave Chinner bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || 154730f712c9SDave Chinner (bma->offset >= rec.br_startoff && 154830f712c9SDave Chinner isnullstartblock(rec.br_startblock)); 154930f712c9SDave Chinner return 0; 155030f712c9SDave Chinner } 155130f712c9SDave Chinner 155230f712c9SDave Chinner /* 155330f712c9SDave Chinner * Returns the file-relative block number of the first block past eof in 155430f712c9SDave Chinner * the file. This is not based on i_size, it is based on the extent records. 155530f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 155630f712c9SDave Chinner */ 155730f712c9SDave Chinner int 155830f712c9SDave Chinner xfs_bmap_last_offset( 155930f712c9SDave Chinner struct xfs_inode *ip, 156030f712c9SDave Chinner xfs_fileoff_t *last_block, 156130f712c9SDave Chinner int whichfork) 156230f712c9SDave Chinner { 156330f712c9SDave Chinner struct xfs_bmbt_irec rec; 156430f712c9SDave Chinner int is_empty; 156530f712c9SDave Chinner int error; 156630f712c9SDave Chinner 156730f712c9SDave Chinner *last_block = 0; 156830f712c9SDave Chinner 156930f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) 157030f712c9SDave Chinner return 0; 157130f712c9SDave Chinner 157230f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && 157330f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 15742451337dSDave Chinner return -EIO; 157530f712c9SDave Chinner 157630f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); 157730f712c9SDave Chinner if (error || is_empty) 157830f712c9SDave Chinner return error; 157930f712c9SDave Chinner 158030f712c9SDave Chinner *last_block = rec.br_startoff + rec.br_blockcount; 158130f712c9SDave Chinner return 0; 158230f712c9SDave Chinner } 158330f712c9SDave Chinner 158430f712c9SDave Chinner /* 158530f712c9SDave Chinner * Returns whether the selected fork of the inode has exactly one 158630f712c9SDave Chinner * block or not. For the data fork we check this matches di_size, 158730f712c9SDave Chinner * implying the file's range is 0..bsize-1. 158830f712c9SDave Chinner */ 158930f712c9SDave Chinner int /* 1=>1 block, 0=>otherwise */ 159030f712c9SDave Chinner xfs_bmap_one_block( 159130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 159230f712c9SDave Chinner int whichfork) /* data or attr fork */ 159330f712c9SDave Chinner { 159430f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */ 159530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 159630f712c9SDave Chinner int rval; /* return value */ 159730f712c9SDave Chinner xfs_bmbt_irec_t s; /* internal version of extent */ 159830f712c9SDave Chinner 159930f712c9SDave Chinner #ifndef DEBUG 160030f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) 160130f712c9SDave Chinner return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; 160230f712c9SDave Chinner #endif /* !DEBUG */ 160330f712c9SDave Chinner if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) 160430f712c9SDave Chinner return 0; 160530f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 160630f712c9SDave Chinner return 0; 160730f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 160830f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 160930f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, 0); 161030f712c9SDave Chinner xfs_bmbt_get_all(ep, &s); 161130f712c9SDave Chinner rval = s.br_startoff == 0 && s.br_blockcount == 1; 161230f712c9SDave Chinner if (rval && whichfork == XFS_DATA_FORK) 161330f712c9SDave Chinner ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); 161430f712c9SDave Chinner return rval; 161530f712c9SDave Chinner } 161630f712c9SDave Chinner 161730f712c9SDave Chinner /* 161830f712c9SDave Chinner * Extent tree manipulation functions used during allocation. 161930f712c9SDave Chinner */ 162030f712c9SDave Chinner 162130f712c9SDave Chinner /* 162230f712c9SDave Chinner * Convert a delayed allocation to a real allocation. 162330f712c9SDave Chinner */ 162430f712c9SDave Chinner STATIC int /* error */ 162530f712c9SDave Chinner xfs_bmap_add_extent_delay_real( 162660b4984fSDarrick J. Wong struct xfs_bmalloca *bma, 162760b4984fSDarrick J. Wong int whichfork) 162830f712c9SDave Chinner { 162930f712c9SDave Chinner struct xfs_bmbt_irec *new = &bma->got; 163030f712c9SDave Chinner int diff; /* temp value */ 163130f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ 163230f712c9SDave Chinner int error; /* error return value */ 163330f712c9SDave Chinner int i; /* temp state */ 163430f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 163530f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 163630f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 163730f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 163830f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 163930f712c9SDave Chinner int state = 0;/* state bits, accessed thru macros */ 164030f712c9SDave Chinner xfs_filblks_t da_new; /* new count del alloc blocks used */ 164130f712c9SDave Chinner xfs_filblks_t da_old; /* old count del alloc blocks used */ 164230f712c9SDave Chinner xfs_filblks_t temp=0; /* value for da_new calculations */ 164330f712c9SDave Chinner xfs_filblks_t temp2=0;/* value for da_new calculations */ 164430f712c9SDave Chinner int tmp_rval; /* partial logging flags */ 1645c29aad41SEric Sandeen struct xfs_mount *mp; 164660b4984fSDarrick J. Wong xfs_extnum_t *nextents; 164730f712c9SDave Chinner 1648f1f96c49SEric Sandeen mp = bma->ip->i_mount; 16496d3eb1ecSDarrick J. Wong ifp = XFS_IFORK_PTR(bma->ip, whichfork); 165060b4984fSDarrick J. Wong ASSERT(whichfork != XFS_ATTR_FORK); 165160b4984fSDarrick J. Wong nextents = (whichfork == XFS_COW_FORK ? &bma->ip->i_cnextents : 165260b4984fSDarrick J. Wong &bma->ip->i_d.di_nextents); 165330f712c9SDave Chinner 165430f712c9SDave Chinner ASSERT(bma->idx >= 0); 16555d829300SEric Sandeen ASSERT(bma->idx <= xfs_iext_count(ifp)); 165630f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 165730f712c9SDave Chinner ASSERT(!bma->cur || 165830f712c9SDave Chinner (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); 165930f712c9SDave Chinner 1660ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 166130f712c9SDave Chinner 166230f712c9SDave Chinner #define LEFT r[0] 166330f712c9SDave Chinner #define RIGHT r[1] 166430f712c9SDave Chinner #define PREV r[2] 166530f712c9SDave Chinner 166660b4984fSDarrick J. Wong if (whichfork == XFS_COW_FORK) 166760b4984fSDarrick J. Wong state |= BMAP_COWFORK; 166860b4984fSDarrick J. Wong 166930f712c9SDave Chinner /* 167030f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 167130f712c9SDave Chinner */ 167230f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, bma->idx); 167330f712c9SDave Chinner xfs_bmbt_get_all(ep, &PREV); 167430f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 167530f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 167630f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 167730f712c9SDave Chinner 167830f712c9SDave Chinner da_old = startblockval(PREV.br_startblock); 167930f712c9SDave Chinner da_new = 0; 168030f712c9SDave Chinner 168130f712c9SDave Chinner /* 168230f712c9SDave Chinner * Set flags determining what part of the previous delayed allocation 168330f712c9SDave Chinner * extent is being replaced by a real allocation. 168430f712c9SDave Chinner */ 168530f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 168630f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 168730f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 168830f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 168930f712c9SDave Chinner 169030f712c9SDave Chinner /* 169130f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 169230f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 169330f712c9SDave Chinner */ 169430f712c9SDave Chinner if (bma->idx > 0) { 169530f712c9SDave Chinner state |= BMAP_LEFT_VALID; 169630f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT); 169730f712c9SDave Chinner 169830f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 169930f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 170030f712c9SDave Chinner } 170130f712c9SDave Chinner 170230f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 170330f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 170430f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 170530f712c9SDave Chinner LEFT.br_state == new->br_state && 170630f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 170730f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 170830f712c9SDave Chinner 170930f712c9SDave Chinner /* 171030f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 171130f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 171230f712c9SDave Chinner * Also check for all-three-contiguous being too large. 171330f712c9SDave Chinner */ 17145d829300SEric Sandeen if (bma->idx < xfs_iext_count(ifp) - 1) { 171530f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 171630f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT); 171730f712c9SDave Chinner 171830f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 171930f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 172030f712c9SDave Chinner } 172130f712c9SDave Chinner 172230f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 172330f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 172430f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 172530f712c9SDave Chinner new->br_state == RIGHT.br_state && 172630f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 172730f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 172830f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 172930f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 173030f712c9SDave Chinner BMAP_RIGHT_FILLING) || 173130f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 173230f712c9SDave Chinner <= MAXEXTLEN)) 173330f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 173430f712c9SDave Chinner 173530f712c9SDave Chinner error = 0; 173630f712c9SDave Chinner /* 173730f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 173830f712c9SDave Chinner */ 173930f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 174030f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 174130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 174230f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 174330f712c9SDave Chinner /* 174430f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 174530f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 174630f712c9SDave Chinner */ 174730f712c9SDave Chinner bma->idx--; 174830f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 174930f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), 175030f712c9SDave Chinner LEFT.br_blockcount + PREV.br_blockcount + 175130f712c9SDave Chinner RIGHT.br_blockcount); 175230f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 175330f712c9SDave Chinner 175430f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); 175560b4984fSDarrick J. Wong (*nextents)--; 175630f712c9SDave Chinner if (bma->cur == NULL) 175730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 175830f712c9SDave Chinner else { 175930f712c9SDave Chinner rval = XFS_ILOG_CORE; 176030f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, 176130f712c9SDave Chinner RIGHT.br_startblock, 176230f712c9SDave Chinner RIGHT.br_blockcount, &i); 176330f712c9SDave Chinner if (error) 176430f712c9SDave Chinner goto done; 1765c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 176630f712c9SDave Chinner error = xfs_btree_delete(bma->cur, &i); 176730f712c9SDave Chinner if (error) 176830f712c9SDave Chinner goto done; 1769c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 177030f712c9SDave Chinner error = xfs_btree_decrement(bma->cur, 0, &i); 177130f712c9SDave Chinner if (error) 177230f712c9SDave Chinner goto done; 1773c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 177430f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, 177530f712c9SDave Chinner LEFT.br_startblock, 177630f712c9SDave Chinner LEFT.br_blockcount + 177730f712c9SDave Chinner PREV.br_blockcount + 177830f712c9SDave Chinner RIGHT.br_blockcount, LEFT.br_state); 177930f712c9SDave Chinner if (error) 178030f712c9SDave Chinner goto done; 178130f712c9SDave Chinner } 178230f712c9SDave Chinner break; 178330f712c9SDave Chinner 178430f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 178530f712c9SDave Chinner /* 178630f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 178730f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 178830f712c9SDave Chinner */ 178930f712c9SDave Chinner bma->idx--; 179030f712c9SDave Chinner 179130f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 179230f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), 179330f712c9SDave Chinner LEFT.br_blockcount + PREV.br_blockcount); 179430f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 179530f712c9SDave Chinner 179630f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); 179730f712c9SDave Chinner if (bma->cur == NULL) 179830f712c9SDave Chinner rval = XFS_ILOG_DEXT; 179930f712c9SDave Chinner else { 180030f712c9SDave Chinner rval = 0; 180130f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, 180230f712c9SDave Chinner LEFT.br_startblock, LEFT.br_blockcount, 180330f712c9SDave Chinner &i); 180430f712c9SDave Chinner if (error) 180530f712c9SDave Chinner goto done; 1806c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 180730f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, 180830f712c9SDave Chinner LEFT.br_startblock, 180930f712c9SDave Chinner LEFT.br_blockcount + 181030f712c9SDave Chinner PREV.br_blockcount, LEFT.br_state); 181130f712c9SDave Chinner if (error) 181230f712c9SDave Chinner goto done; 181330f712c9SDave Chinner } 181430f712c9SDave Chinner break; 181530f712c9SDave Chinner 181630f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 181730f712c9SDave Chinner /* 181830f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 181930f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 182030f712c9SDave Chinner */ 182130f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 182230f712c9SDave Chinner xfs_bmbt_set_startblock(ep, new->br_startblock); 182330f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 182430f712c9SDave Chinner PREV.br_blockcount + RIGHT.br_blockcount); 182530f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 182630f712c9SDave Chinner 182730f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); 182830f712c9SDave Chinner if (bma->cur == NULL) 182930f712c9SDave Chinner rval = XFS_ILOG_DEXT; 183030f712c9SDave Chinner else { 183130f712c9SDave Chinner rval = 0; 183230f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, 183330f712c9SDave Chinner RIGHT.br_startblock, 183430f712c9SDave Chinner RIGHT.br_blockcount, &i); 183530f712c9SDave Chinner if (error) 183630f712c9SDave Chinner goto done; 1837c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 183830f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, PREV.br_startoff, 183930f712c9SDave Chinner new->br_startblock, 184030f712c9SDave Chinner PREV.br_blockcount + 184130f712c9SDave Chinner RIGHT.br_blockcount, PREV.br_state); 184230f712c9SDave Chinner if (error) 184330f712c9SDave Chinner goto done; 184430f712c9SDave Chinner } 184530f712c9SDave Chinner break; 184630f712c9SDave Chinner 184730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 184830f712c9SDave Chinner /* 184930f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 185030f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 185130f712c9SDave Chinner * the new one. 185230f712c9SDave Chinner */ 185330f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 185430f712c9SDave Chinner xfs_bmbt_set_startblock(ep, new->br_startblock); 185505a630d7SDarrick J. Wong xfs_bmbt_set_state(ep, new->br_state); 185630f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 185730f712c9SDave Chinner 185860b4984fSDarrick J. Wong (*nextents)++; 185930f712c9SDave Chinner if (bma->cur == NULL) 186030f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 186130f712c9SDave Chinner else { 186230f712c9SDave Chinner rval = XFS_ILOG_CORE; 186330f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 186430f712c9SDave Chinner new->br_startblock, new->br_blockcount, 186530f712c9SDave Chinner &i); 186630f712c9SDave Chinner if (error) 186730f712c9SDave Chinner goto done; 1868c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 186930f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 187030f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 187130f712c9SDave Chinner if (error) 187230f712c9SDave Chinner goto done; 1873c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 187430f712c9SDave Chinner } 187530f712c9SDave Chinner break; 187630f712c9SDave Chinner 187730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 187830f712c9SDave Chinner /* 187930f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 188030f712c9SDave Chinner * The left neighbor is contiguous. 188130f712c9SDave Chinner */ 188230f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); 188330f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1), 188430f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount); 188530f712c9SDave Chinner xfs_bmbt_set_startoff(ep, 188630f712c9SDave Chinner PREV.br_startoff + new->br_blockcount); 188730f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); 188830f712c9SDave Chinner 188930f712c9SDave Chinner temp = PREV.br_blockcount - new->br_blockcount; 189030f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 189130f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 189230f712c9SDave Chinner if (bma->cur == NULL) 189330f712c9SDave Chinner rval = XFS_ILOG_DEXT; 189430f712c9SDave Chinner else { 189530f712c9SDave Chinner rval = 0; 189630f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, 189730f712c9SDave Chinner LEFT.br_startblock, LEFT.br_blockcount, 189830f712c9SDave Chinner &i); 189930f712c9SDave Chinner if (error) 190030f712c9SDave Chinner goto done; 1901c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 190230f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, 190330f712c9SDave Chinner LEFT.br_startblock, 190430f712c9SDave Chinner LEFT.br_blockcount + 190530f712c9SDave Chinner new->br_blockcount, 190630f712c9SDave Chinner LEFT.br_state); 190730f712c9SDave Chinner if (error) 190830f712c9SDave Chinner goto done; 190930f712c9SDave Chinner } 191030f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 191130f712c9SDave Chinner startblockval(PREV.br_startblock)); 191230f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); 191330f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 191430f712c9SDave Chinner 191530f712c9SDave Chinner bma->idx--; 191630f712c9SDave Chinner break; 191730f712c9SDave Chinner 191830f712c9SDave Chinner case BMAP_LEFT_FILLING: 191930f712c9SDave Chinner /* 192030f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 192130f712c9SDave Chinner * The left neighbor is not contiguous. 192230f712c9SDave Chinner */ 192330f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 192430f712c9SDave Chinner xfs_bmbt_set_startoff(ep, new_endoff); 192530f712c9SDave Chinner temp = PREV.br_blockcount - new->br_blockcount; 192630f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 192730f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx, 1, new, state); 192860b4984fSDarrick J. Wong (*nextents)++; 192930f712c9SDave Chinner if (bma->cur == NULL) 193030f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 193130f712c9SDave Chinner else { 193230f712c9SDave Chinner rval = XFS_ILOG_CORE; 193330f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 193430f712c9SDave Chinner new->br_startblock, new->br_blockcount, 193530f712c9SDave Chinner &i); 193630f712c9SDave Chinner if (error) 193730f712c9SDave Chinner goto done; 1938c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 193930f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 194030f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 194130f712c9SDave Chinner if (error) 194230f712c9SDave Chinner goto done; 1943c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 194430f712c9SDave Chinner } 194530f712c9SDave Chinner 19466d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 194730f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 19482c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, 19496d3eb1ecSDarrick J. Wong &bma->cur, 1, &tmp_rval, whichfork); 195030f712c9SDave Chinner rval |= tmp_rval; 195130f712c9SDave Chinner if (error) 195230f712c9SDave Chinner goto done; 195330f712c9SDave Chinner } 195430f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 195530f712c9SDave Chinner startblockval(PREV.br_startblock) - 195630f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 195730f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, bma->idx + 1); 195830f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); 195930f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 196030f712c9SDave Chinner break; 196130f712c9SDave Chinner 196230f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 196330f712c9SDave Chinner /* 196430f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 196530f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 196630f712c9SDave Chinner */ 196730f712c9SDave Chinner temp = PREV.br_blockcount - new->br_blockcount; 196830f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 196930f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 197030f712c9SDave Chinner xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1), 197130f712c9SDave Chinner new->br_startoff, new->br_startblock, 197230f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount, 197330f712c9SDave Chinner RIGHT.br_state); 197430f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 197530f712c9SDave Chinner if (bma->cur == NULL) 197630f712c9SDave Chinner rval = XFS_ILOG_DEXT; 197730f712c9SDave Chinner else { 197830f712c9SDave Chinner rval = 0; 197930f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, 198030f712c9SDave Chinner RIGHT.br_startblock, 198130f712c9SDave Chinner RIGHT.br_blockcount, &i); 198230f712c9SDave Chinner if (error) 198330f712c9SDave Chinner goto done; 1984c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 198530f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, new->br_startoff, 198630f712c9SDave Chinner new->br_startblock, 198730f712c9SDave Chinner new->br_blockcount + 198830f712c9SDave Chinner RIGHT.br_blockcount, 198930f712c9SDave Chinner RIGHT.br_state); 199030f712c9SDave Chinner if (error) 199130f712c9SDave Chinner goto done; 199230f712c9SDave Chinner } 199330f712c9SDave Chinner 199430f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 199530f712c9SDave Chinner startblockval(PREV.br_startblock)); 199630f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 199730f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); 199830f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 199930f712c9SDave Chinner 200030f712c9SDave Chinner bma->idx++; 200130f712c9SDave Chinner break; 200230f712c9SDave Chinner 200330f712c9SDave Chinner case BMAP_RIGHT_FILLING: 200430f712c9SDave Chinner /* 200530f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 200630f712c9SDave Chinner * The right neighbor is not contiguous. 200730f712c9SDave Chinner */ 200830f712c9SDave Chinner temp = PREV.br_blockcount - new->br_blockcount; 200930f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 201030f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 201130f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); 201260b4984fSDarrick J. Wong (*nextents)++; 201330f712c9SDave Chinner if (bma->cur == NULL) 201430f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 201530f712c9SDave Chinner else { 201630f712c9SDave Chinner rval = XFS_ILOG_CORE; 201730f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 201830f712c9SDave Chinner new->br_startblock, new->br_blockcount, 201930f712c9SDave Chinner &i); 202030f712c9SDave Chinner if (error) 202130f712c9SDave Chinner goto done; 2022c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 202330f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 202430f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 202530f712c9SDave Chinner if (error) 202630f712c9SDave Chinner goto done; 2027c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 202830f712c9SDave Chinner } 202930f712c9SDave Chinner 20306d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 203130f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 20322c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 1, 20336d3eb1ecSDarrick J. Wong &tmp_rval, whichfork); 203430f712c9SDave Chinner rval |= tmp_rval; 203530f712c9SDave Chinner if (error) 203630f712c9SDave Chinner goto done; 203730f712c9SDave Chinner } 203830f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 203930f712c9SDave Chinner startblockval(PREV.br_startblock) - 204030f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 204130f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, bma->idx); 204230f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); 204330f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 204430f712c9SDave Chinner 204530f712c9SDave Chinner bma->idx++; 204630f712c9SDave Chinner break; 204730f712c9SDave Chinner 204830f712c9SDave Chinner case 0: 204930f712c9SDave Chinner /* 205030f712c9SDave Chinner * Filling in the middle part of a previous delayed allocation. 205130f712c9SDave Chinner * Contiguity is impossible here. 205230f712c9SDave Chinner * This case is avoided almost all the time. 205330f712c9SDave Chinner * 205430f712c9SDave Chinner * We start with a delayed allocation: 205530f712c9SDave Chinner * 205630f712c9SDave Chinner * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ 205730f712c9SDave Chinner * PREV @ idx 205830f712c9SDave Chinner * 205930f712c9SDave Chinner * and we are allocating: 206030f712c9SDave Chinner * +rrrrrrrrrrrrrrrrr+ 206130f712c9SDave Chinner * new 206230f712c9SDave Chinner * 206330f712c9SDave Chinner * and we set it up for insertion as: 206430f712c9SDave Chinner * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ 206530f712c9SDave Chinner * new 206630f712c9SDave Chinner * PREV @ idx LEFT RIGHT 206730f712c9SDave Chinner * inserted at idx + 1 206830f712c9SDave Chinner */ 206930f712c9SDave Chinner temp = new->br_startoff - PREV.br_startoff; 207030f712c9SDave Chinner temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; 207130f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); 207230f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */ 207330f712c9SDave Chinner LEFT = *new; 207430f712c9SDave Chinner RIGHT.br_state = PREV.br_state; 207530f712c9SDave Chinner RIGHT.br_startblock = nullstartblock( 207630f712c9SDave Chinner (int)xfs_bmap_worst_indlen(bma->ip, temp2)); 207730f712c9SDave Chinner RIGHT.br_startoff = new_endoff; 207830f712c9SDave Chinner RIGHT.br_blockcount = temp2; 207930f712c9SDave Chinner /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ 208030f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); 208160b4984fSDarrick J. Wong (*nextents)++; 208230f712c9SDave Chinner if (bma->cur == NULL) 208330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 208430f712c9SDave Chinner else { 208530f712c9SDave Chinner rval = XFS_ILOG_CORE; 208630f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 208730f712c9SDave Chinner new->br_startblock, new->br_blockcount, 208830f712c9SDave Chinner &i); 208930f712c9SDave Chinner if (error) 209030f712c9SDave Chinner goto done; 2091c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 209230f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 209330f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 209430f712c9SDave Chinner if (error) 209530f712c9SDave Chinner goto done; 2096c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 209730f712c9SDave Chinner } 209830f712c9SDave Chinner 20996d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 210030f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 21012c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 21026d3eb1ecSDarrick J. Wong 1, &tmp_rval, whichfork); 210330f712c9SDave Chinner rval |= tmp_rval; 210430f712c9SDave Chinner if (error) 210530f712c9SDave Chinner goto done; 210630f712c9SDave Chinner } 210730f712c9SDave Chinner temp = xfs_bmap_worst_indlen(bma->ip, temp); 210830f712c9SDave Chinner temp2 = xfs_bmap_worst_indlen(bma->ip, temp2); 210930f712c9SDave Chinner diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - 211030f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 211130f712c9SDave Chinner if (diff > 0) { 21120d485adaSDave Chinner error = xfs_mod_fdblocks(bma->ip->i_mount, 21130d485adaSDave Chinner -((int64_t)diff), false); 211430f712c9SDave Chinner ASSERT(!error); 211530f712c9SDave Chinner if (error) 211630f712c9SDave Chinner goto done; 211730f712c9SDave Chinner } 211830f712c9SDave Chinner 211930f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, bma->idx); 212030f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); 212130f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 212230f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_); 212330f712c9SDave Chinner xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2), 212430f712c9SDave Chinner nullstartblock((int)temp2)); 212530f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_); 212630f712c9SDave Chinner 212730f712c9SDave Chinner bma->idx++; 212830f712c9SDave Chinner da_new = temp + temp2; 212930f712c9SDave Chinner break; 213030f712c9SDave Chinner 213130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 213230f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 213330f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 213430f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 213530f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 213630f712c9SDave Chinner case BMAP_LEFT_CONTIG: 213730f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 213830f712c9SDave Chinner /* 213930f712c9SDave Chinner * These cases are all impossible. 214030f712c9SDave Chinner */ 214130f712c9SDave Chinner ASSERT(0); 214230f712c9SDave Chinner } 214330f712c9SDave Chinner 21449c194644SDarrick J. Wong /* add reverse mapping */ 21459c194644SDarrick J. Wong error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); 21469c194644SDarrick J. Wong if (error) 21479c194644SDarrick J. Wong goto done; 21489c194644SDarrick J. Wong 214930f712c9SDave Chinner /* convert to a btree if necessary */ 21506d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 215130f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 215230f712c9SDave Chinner 215330f712c9SDave Chinner ASSERT(bma->cur == NULL); 215430f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 21552c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 21566d3eb1ecSDarrick J. Wong da_old > 0, &tmp_logflags, whichfork); 215730f712c9SDave Chinner bma->logflags |= tmp_logflags; 215830f712c9SDave Chinner if (error) 215930f712c9SDave Chinner goto done; 216030f712c9SDave Chinner } 216130f712c9SDave Chinner 216230f712c9SDave Chinner /* adjust for changes in reserved delayed indirect blocks */ 216330f712c9SDave Chinner if (da_old || da_new) { 216430f712c9SDave Chinner temp = da_new; 216530f712c9SDave Chinner if (bma->cur) 216630f712c9SDave Chinner temp += bma->cur->bc_private.b.allocated; 216730f712c9SDave Chinner ASSERT(temp <= da_old); 216830f712c9SDave Chinner if (temp < da_old) 21690d485adaSDave Chinner xfs_mod_fdblocks(bma->ip->i_mount, 21700d485adaSDave Chinner (int64_t)(da_old - temp), false); 217130f712c9SDave Chinner } 217230f712c9SDave Chinner 217330f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 217430f712c9SDave Chinner if (bma->cur) 217530f712c9SDave Chinner bma->cur->bc_private.b.allocated = 0; 217630f712c9SDave Chinner 21776d3eb1ecSDarrick J. Wong xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); 217830f712c9SDave Chinner done: 217960b4984fSDarrick J. Wong if (whichfork != XFS_COW_FORK) 218030f712c9SDave Chinner bma->logflags |= rval; 218130f712c9SDave Chinner return error; 218230f712c9SDave Chinner #undef LEFT 218330f712c9SDave Chinner #undef RIGHT 218430f712c9SDave Chinner #undef PREV 218530f712c9SDave Chinner } 218630f712c9SDave Chinner 218730f712c9SDave Chinner /* 218830f712c9SDave Chinner * Convert an unwritten allocation to a real allocation or vice versa. 218930f712c9SDave Chinner */ 219030f712c9SDave Chinner STATIC int /* error */ 219130f712c9SDave Chinner xfs_bmap_add_extent_unwritten_real( 219230f712c9SDave Chinner struct xfs_trans *tp, 219330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 219405a630d7SDarrick J. Wong int whichfork, 219530f712c9SDave Chinner xfs_extnum_t *idx, /* extent number to update/insert */ 219630f712c9SDave Chinner xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ 219730f712c9SDave Chinner xfs_bmbt_irec_t *new, /* new data to add to file extents */ 219830f712c9SDave Chinner xfs_fsblock_t *first, /* pointer to firstblock variable */ 21992c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* list of extents to be freed */ 220030f712c9SDave Chinner int *logflagsp) /* inode logging flags */ 220130f712c9SDave Chinner { 220230f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 220330f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ 220430f712c9SDave Chinner int error; /* error return value */ 220530f712c9SDave Chinner int i; /* temp state */ 220630f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 220730f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 220830f712c9SDave Chinner xfs_exntst_t newext; /* new extent state */ 220930f712c9SDave Chinner xfs_exntst_t oldext; /* old extent state */ 221030f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 221130f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 221230f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 221330f712c9SDave Chinner int state = 0;/* state bits, accessed thru macros */ 221405a630d7SDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 221530f712c9SDave Chinner 221630f712c9SDave Chinner *logflagsp = 0; 221730f712c9SDave Chinner 221830f712c9SDave Chinner cur = *curp; 221905a630d7SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 222005a630d7SDarrick J. Wong if (whichfork == XFS_COW_FORK) 222105a630d7SDarrick J. Wong state |= BMAP_COWFORK; 222230f712c9SDave Chinner 222330f712c9SDave Chinner ASSERT(*idx >= 0); 22245d829300SEric Sandeen ASSERT(*idx <= xfs_iext_count(ifp)); 222530f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 222630f712c9SDave Chinner 2227ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 222830f712c9SDave Chinner 222930f712c9SDave Chinner #define LEFT r[0] 223030f712c9SDave Chinner #define RIGHT r[1] 223130f712c9SDave Chinner #define PREV r[2] 223230f712c9SDave Chinner 223330f712c9SDave Chinner /* 223430f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 223530f712c9SDave Chinner */ 223630f712c9SDave Chinner error = 0; 223730f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, *idx); 223830f712c9SDave Chinner xfs_bmbt_get_all(ep, &PREV); 223930f712c9SDave Chinner newext = new->br_state; 224030f712c9SDave Chinner oldext = (newext == XFS_EXT_UNWRITTEN) ? 224130f712c9SDave Chinner XFS_EXT_NORM : XFS_EXT_UNWRITTEN; 224230f712c9SDave Chinner ASSERT(PREV.br_state == oldext); 224330f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 224430f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 224530f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 224630f712c9SDave Chinner 224730f712c9SDave Chinner /* 224830f712c9SDave Chinner * Set flags determining what part of the previous oldext allocation 224930f712c9SDave Chinner * extent is being replaced by a newext allocation. 225030f712c9SDave Chinner */ 225130f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 225230f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 225330f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 225430f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 225530f712c9SDave Chinner 225630f712c9SDave Chinner /* 225730f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 225830f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 225930f712c9SDave Chinner */ 226030f712c9SDave Chinner if (*idx > 0) { 226130f712c9SDave Chinner state |= BMAP_LEFT_VALID; 226230f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT); 226330f712c9SDave Chinner 226430f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 226530f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 226630f712c9SDave Chinner } 226730f712c9SDave Chinner 226830f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 226930f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 227030f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 227130f712c9SDave Chinner LEFT.br_state == newext && 227230f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 227330f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 227430f712c9SDave Chinner 227530f712c9SDave Chinner /* 227630f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 227730f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 227830f712c9SDave Chinner * Also check for all-three-contiguous being too large. 227930f712c9SDave Chinner */ 228005a630d7SDarrick J. Wong if (*idx < xfs_iext_count(ifp) - 1) { 228130f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 228230f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT); 228330f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 228430f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 228530f712c9SDave Chinner } 228630f712c9SDave Chinner 228730f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 228830f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 228930f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 229030f712c9SDave Chinner newext == RIGHT.br_state && 229130f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 229230f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 229330f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 229430f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 229530f712c9SDave Chinner BMAP_RIGHT_FILLING) || 229630f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 229730f712c9SDave Chinner <= MAXEXTLEN)) 229830f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 229930f712c9SDave Chinner 230030f712c9SDave Chinner /* 230130f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 230230f712c9SDave Chinner */ 230330f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 230430f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 230530f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 230630f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 230730f712c9SDave Chinner /* 230830f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 230930f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 231030f712c9SDave Chinner */ 231130f712c9SDave Chinner --*idx; 231230f712c9SDave Chinner 231330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 231430f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), 231530f712c9SDave Chinner LEFT.br_blockcount + PREV.br_blockcount + 231630f712c9SDave Chinner RIGHT.br_blockcount); 231730f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 231830f712c9SDave Chinner 231930f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 2, state); 232005a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 232105a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 2); 232230f712c9SDave Chinner if (cur == NULL) 232330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 232430f712c9SDave Chinner else { 232530f712c9SDave Chinner rval = XFS_ILOG_CORE; 232630f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, 232730f712c9SDave Chinner RIGHT.br_startblock, 232830f712c9SDave Chinner RIGHT.br_blockcount, &i))) 232930f712c9SDave Chinner goto done; 2330c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 233130f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 233230f712c9SDave Chinner goto done; 2333c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 233430f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 233530f712c9SDave Chinner goto done; 2336c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 233730f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 233830f712c9SDave Chinner goto done; 2339c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 234030f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 234130f712c9SDave Chinner goto done; 2342c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 234330f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, 234430f712c9SDave Chinner LEFT.br_startblock, 234530f712c9SDave Chinner LEFT.br_blockcount + PREV.br_blockcount + 234630f712c9SDave Chinner RIGHT.br_blockcount, LEFT.br_state))) 234730f712c9SDave Chinner goto done; 234830f712c9SDave Chinner } 234930f712c9SDave Chinner break; 235030f712c9SDave Chinner 235130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 235230f712c9SDave Chinner /* 235330f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 235430f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 235530f712c9SDave Chinner */ 235630f712c9SDave Chinner --*idx; 235730f712c9SDave Chinner 235830f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 235930f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), 236030f712c9SDave Chinner LEFT.br_blockcount + PREV.br_blockcount); 236130f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 236230f712c9SDave Chinner 236330f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 1, state); 236405a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 236505a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 236630f712c9SDave Chinner if (cur == NULL) 236730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 236830f712c9SDave Chinner else { 236930f712c9SDave Chinner rval = XFS_ILOG_CORE; 237030f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 237130f712c9SDave Chinner PREV.br_startblock, PREV.br_blockcount, 237230f712c9SDave Chinner &i))) 237330f712c9SDave Chinner goto done; 2374c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 237530f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 237630f712c9SDave Chinner goto done; 2377c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 237830f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 237930f712c9SDave Chinner goto done; 2380c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 238130f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, 238230f712c9SDave Chinner LEFT.br_startblock, 238330f712c9SDave Chinner LEFT.br_blockcount + PREV.br_blockcount, 238430f712c9SDave Chinner LEFT.br_state))) 238530f712c9SDave Chinner goto done; 238630f712c9SDave Chinner } 238730f712c9SDave Chinner break; 238830f712c9SDave Chinner 238930f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 239030f712c9SDave Chinner /* 239130f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 239230f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 239330f712c9SDave Chinner */ 239430f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 239530f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 239630f712c9SDave Chinner PREV.br_blockcount + RIGHT.br_blockcount); 239730f712c9SDave Chinner xfs_bmbt_set_state(ep, newext); 239830f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 239930f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 1, state); 240005a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 240105a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 240230f712c9SDave Chinner if (cur == NULL) 240330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 240430f712c9SDave Chinner else { 240530f712c9SDave Chinner rval = XFS_ILOG_CORE; 240630f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, 240730f712c9SDave Chinner RIGHT.br_startblock, 240830f712c9SDave Chinner RIGHT.br_blockcount, &i))) 240930f712c9SDave Chinner goto done; 2410c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 241130f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 241230f712c9SDave Chinner goto done; 2413c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 241430f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 241530f712c9SDave Chinner goto done; 2416c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 241730f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, new->br_startoff, 241830f712c9SDave Chinner new->br_startblock, 241930f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount, 242030f712c9SDave Chinner newext))) 242130f712c9SDave Chinner goto done; 242230f712c9SDave Chinner } 242330f712c9SDave Chinner break; 242430f712c9SDave Chinner 242530f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 242630f712c9SDave Chinner /* 242730f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 242830f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 242930f712c9SDave Chinner * the new one. 243030f712c9SDave Chinner */ 243130f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 243230f712c9SDave Chinner xfs_bmbt_set_state(ep, newext); 243330f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 243430f712c9SDave Chinner 243530f712c9SDave Chinner if (cur == NULL) 243630f712c9SDave Chinner rval = XFS_ILOG_DEXT; 243730f712c9SDave Chinner else { 243830f712c9SDave Chinner rval = 0; 243930f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, 244030f712c9SDave Chinner new->br_startblock, new->br_blockcount, 244130f712c9SDave Chinner &i))) 244230f712c9SDave Chinner goto done; 2443c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 244430f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, new->br_startoff, 244530f712c9SDave Chinner new->br_startblock, new->br_blockcount, 244630f712c9SDave Chinner newext))) 244730f712c9SDave Chinner goto done; 244830f712c9SDave Chinner } 244930f712c9SDave Chinner break; 245030f712c9SDave Chinner 245130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 245230f712c9SDave Chinner /* 245330f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 245430f712c9SDave Chinner * The left neighbor is contiguous. 245530f712c9SDave Chinner */ 245630f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_); 245730f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1), 245830f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount); 245930f712c9SDave Chinner xfs_bmbt_set_startoff(ep, 246030f712c9SDave Chinner PREV.br_startoff + new->br_blockcount); 246130f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_); 246230f712c9SDave Chinner 246330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 246430f712c9SDave Chinner xfs_bmbt_set_startblock(ep, 246530f712c9SDave Chinner new->br_startblock + new->br_blockcount); 246630f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 246730f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount); 246830f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 246930f712c9SDave Chinner 247030f712c9SDave Chinner --*idx; 247130f712c9SDave Chinner 247230f712c9SDave Chinner if (cur == NULL) 247330f712c9SDave Chinner rval = XFS_ILOG_DEXT; 247430f712c9SDave Chinner else { 247530f712c9SDave Chinner rval = 0; 247630f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 247730f712c9SDave Chinner PREV.br_startblock, PREV.br_blockcount, 247830f712c9SDave Chinner &i))) 247930f712c9SDave Chinner goto done; 2480c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 248130f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, 248230f712c9SDave Chinner PREV.br_startoff + new->br_blockcount, 248330f712c9SDave Chinner PREV.br_startblock + new->br_blockcount, 248430f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount, 248530f712c9SDave Chinner oldext))) 248630f712c9SDave Chinner goto done; 248730f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 248830f712c9SDave Chinner goto done; 248930f712c9SDave Chinner error = xfs_bmbt_update(cur, LEFT.br_startoff, 249030f712c9SDave Chinner LEFT.br_startblock, 249130f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount, 249230f712c9SDave Chinner LEFT.br_state); 249330f712c9SDave Chinner if (error) 249430f712c9SDave Chinner goto done; 249530f712c9SDave Chinner } 249630f712c9SDave Chinner break; 249730f712c9SDave Chinner 249830f712c9SDave Chinner case BMAP_LEFT_FILLING: 249930f712c9SDave Chinner /* 250030f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 250130f712c9SDave Chinner * The left neighbor is not contiguous. 250230f712c9SDave Chinner */ 250330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 250430f712c9SDave Chinner ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); 250530f712c9SDave Chinner xfs_bmbt_set_startoff(ep, new_endoff); 250630f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 250730f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount); 250830f712c9SDave Chinner xfs_bmbt_set_startblock(ep, 250930f712c9SDave Chinner new->br_startblock + new->br_blockcount); 251030f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 251130f712c9SDave Chinner 251230f712c9SDave Chinner xfs_iext_insert(ip, *idx, 1, new, state); 251305a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 251405a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 251530f712c9SDave Chinner if (cur == NULL) 251630f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 251730f712c9SDave Chinner else { 251830f712c9SDave Chinner rval = XFS_ILOG_CORE; 251930f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 252030f712c9SDave Chinner PREV.br_startblock, PREV.br_blockcount, 252130f712c9SDave Chinner &i))) 252230f712c9SDave Chinner goto done; 2523c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 252430f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, 252530f712c9SDave Chinner PREV.br_startoff + new->br_blockcount, 252630f712c9SDave Chinner PREV.br_startblock + new->br_blockcount, 252730f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount, 252830f712c9SDave Chinner oldext))) 252930f712c9SDave Chinner goto done; 253030f712c9SDave Chinner cur->bc_rec.b = *new; 253130f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 253230f712c9SDave Chinner goto done; 2533c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 253430f712c9SDave Chinner } 253530f712c9SDave Chinner break; 253630f712c9SDave Chinner 253730f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 253830f712c9SDave Chinner /* 253930f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 254030f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 254130f712c9SDave Chinner */ 254230f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 254330f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 254430f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount); 254530f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 254630f712c9SDave Chinner 254730f712c9SDave Chinner ++*idx; 254830f712c9SDave Chinner 254930f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 255030f712c9SDave Chinner xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), 255130f712c9SDave Chinner new->br_startoff, new->br_startblock, 255230f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount, newext); 255330f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 255430f712c9SDave Chinner 255530f712c9SDave Chinner if (cur == NULL) 255630f712c9SDave Chinner rval = XFS_ILOG_DEXT; 255730f712c9SDave Chinner else { 255830f712c9SDave Chinner rval = 0; 255930f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 256030f712c9SDave Chinner PREV.br_startblock, 256130f712c9SDave Chinner PREV.br_blockcount, &i))) 256230f712c9SDave Chinner goto done; 2563c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 256430f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, PREV.br_startoff, 256530f712c9SDave Chinner PREV.br_startblock, 256630f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount, 256730f712c9SDave Chinner oldext))) 256830f712c9SDave Chinner goto done; 256930f712c9SDave Chinner if ((error = xfs_btree_increment(cur, 0, &i))) 257030f712c9SDave Chinner goto done; 257130f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, new->br_startoff, 257230f712c9SDave Chinner new->br_startblock, 257330f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount, 257430f712c9SDave Chinner newext))) 257530f712c9SDave Chinner goto done; 257630f712c9SDave Chinner } 257730f712c9SDave Chinner break; 257830f712c9SDave Chinner 257930f712c9SDave Chinner case BMAP_RIGHT_FILLING: 258030f712c9SDave Chinner /* 258130f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 258230f712c9SDave Chinner * The right neighbor is not contiguous. 258330f712c9SDave Chinner */ 258430f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 258530f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 258630f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount); 258730f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 258830f712c9SDave Chinner 258930f712c9SDave Chinner ++*idx; 259030f712c9SDave Chinner xfs_iext_insert(ip, *idx, 1, new, state); 259130f712c9SDave Chinner 259205a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 259305a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 259430f712c9SDave Chinner if (cur == NULL) 259530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 259630f712c9SDave Chinner else { 259730f712c9SDave Chinner rval = XFS_ILOG_CORE; 259830f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 259930f712c9SDave Chinner PREV.br_startblock, PREV.br_blockcount, 260030f712c9SDave Chinner &i))) 260130f712c9SDave Chinner goto done; 2602c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 260330f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, PREV.br_startoff, 260430f712c9SDave Chinner PREV.br_startblock, 260530f712c9SDave Chinner PREV.br_blockcount - new->br_blockcount, 260630f712c9SDave Chinner oldext))) 260730f712c9SDave Chinner goto done; 260830f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, 260930f712c9SDave Chinner new->br_startblock, new->br_blockcount, 261030f712c9SDave Chinner &i))) 261130f712c9SDave Chinner goto done; 2612c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 261330f712c9SDave Chinner cur->bc_rec.b.br_state = XFS_EXT_NORM; 261430f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 261530f712c9SDave Chinner goto done; 2616c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 261730f712c9SDave Chinner } 261830f712c9SDave Chinner break; 261930f712c9SDave Chinner 262030f712c9SDave Chinner case 0: 262130f712c9SDave Chinner /* 262230f712c9SDave Chinner * Setting the middle part of a previous oldext extent to 262330f712c9SDave Chinner * newext. Contiguity is impossible here. 262430f712c9SDave Chinner * One extent becomes three extents. 262530f712c9SDave Chinner */ 262630f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 262730f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 262830f712c9SDave Chinner new->br_startoff - PREV.br_startoff); 262930f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 263030f712c9SDave Chinner 263130f712c9SDave Chinner r[0] = *new; 263230f712c9SDave Chinner r[1].br_startoff = new_endoff; 263330f712c9SDave Chinner r[1].br_blockcount = 263430f712c9SDave Chinner PREV.br_startoff + PREV.br_blockcount - new_endoff; 263530f712c9SDave Chinner r[1].br_startblock = new->br_startblock + new->br_blockcount; 263630f712c9SDave Chinner r[1].br_state = oldext; 263730f712c9SDave Chinner 263830f712c9SDave Chinner ++*idx; 263930f712c9SDave Chinner xfs_iext_insert(ip, *idx, 2, &r[0], state); 264030f712c9SDave Chinner 264105a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 264205a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 2); 264330f712c9SDave Chinner if (cur == NULL) 264430f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 264530f712c9SDave Chinner else { 264630f712c9SDave Chinner rval = XFS_ILOG_CORE; 264730f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 264830f712c9SDave Chinner PREV.br_startblock, PREV.br_blockcount, 264930f712c9SDave Chinner &i))) 265030f712c9SDave Chinner goto done; 2651c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 265230f712c9SDave Chinner /* new right extent - oldext */ 265330f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, r[1].br_startoff, 265430f712c9SDave Chinner r[1].br_startblock, r[1].br_blockcount, 265530f712c9SDave Chinner r[1].br_state))) 265630f712c9SDave Chinner goto done; 265730f712c9SDave Chinner /* new left extent - oldext */ 265830f712c9SDave Chinner cur->bc_rec.b = PREV; 265930f712c9SDave Chinner cur->bc_rec.b.br_blockcount = 266030f712c9SDave Chinner new->br_startoff - PREV.br_startoff; 266130f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 266230f712c9SDave Chinner goto done; 2663c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 266430f712c9SDave Chinner /* 266530f712c9SDave Chinner * Reset the cursor to the position of the new extent 266630f712c9SDave Chinner * we are about to insert as we can't trust it after 266730f712c9SDave Chinner * the previous insert. 266830f712c9SDave Chinner */ 266930f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, 267030f712c9SDave Chinner new->br_startblock, new->br_blockcount, 267130f712c9SDave Chinner &i))) 267230f712c9SDave Chinner goto done; 2673c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 267430f712c9SDave Chinner /* new middle extent - newext */ 267530f712c9SDave Chinner cur->bc_rec.b.br_state = new->br_state; 267630f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 267730f712c9SDave Chinner goto done; 2678c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 267930f712c9SDave Chinner } 268030f712c9SDave Chinner break; 268130f712c9SDave Chinner 268230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 268330f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 268430f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 268530f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 268630f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 268730f712c9SDave Chinner case BMAP_LEFT_CONTIG: 268830f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 268930f712c9SDave Chinner /* 269030f712c9SDave Chinner * These cases are all impossible. 269130f712c9SDave Chinner */ 269230f712c9SDave Chinner ASSERT(0); 269330f712c9SDave Chinner } 269430f712c9SDave Chinner 26959c194644SDarrick J. Wong /* update reverse mappings */ 269605a630d7SDarrick J. Wong error = xfs_rmap_convert_extent(mp, dfops, ip, whichfork, new); 26979c194644SDarrick J. Wong if (error) 26989c194644SDarrick J. Wong goto done; 26999c194644SDarrick J. Wong 270030f712c9SDave Chinner /* convert to a btree if necessary */ 270105a630d7SDarrick J. Wong if (xfs_bmap_needs_btree(ip, whichfork)) { 270230f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 270330f712c9SDave Chinner 270430f712c9SDave Chinner ASSERT(cur == NULL); 27052c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, &cur, 270605a630d7SDarrick J. Wong 0, &tmp_logflags, whichfork); 270730f712c9SDave Chinner *logflagsp |= tmp_logflags; 270830f712c9SDave Chinner if (error) 270930f712c9SDave Chinner goto done; 271030f712c9SDave Chinner } 271130f712c9SDave Chinner 271230f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 271330f712c9SDave Chinner if (cur) { 271430f712c9SDave Chinner cur->bc_private.b.allocated = 0; 271530f712c9SDave Chinner *curp = cur; 271630f712c9SDave Chinner } 271730f712c9SDave Chinner 271805a630d7SDarrick J. Wong xfs_bmap_check_leaf_extents(*curp, ip, whichfork); 271930f712c9SDave Chinner done: 272030f712c9SDave Chinner *logflagsp |= rval; 272130f712c9SDave Chinner return error; 272230f712c9SDave Chinner #undef LEFT 272330f712c9SDave Chinner #undef RIGHT 272430f712c9SDave Chinner #undef PREV 272530f712c9SDave Chinner } 272630f712c9SDave Chinner 272730f712c9SDave Chinner /* 272830f712c9SDave Chinner * Convert a hole to a delayed allocation. 272930f712c9SDave Chinner */ 273030f712c9SDave Chinner STATIC void 273130f712c9SDave Chinner xfs_bmap_add_extent_hole_delay( 273230f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 2733be51f811SDarrick J. Wong int whichfork, 273430f712c9SDave Chinner xfs_extnum_t *idx, /* extent number to update/insert */ 273530f712c9SDave Chinner xfs_bmbt_irec_t *new) /* new data to add to file extents */ 273630f712c9SDave Chinner { 273730f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 273830f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 273930f712c9SDave Chinner xfs_filblks_t newlen=0; /* new indirect size */ 274030f712c9SDave Chinner xfs_filblks_t oldlen=0; /* old indirect size */ 274130f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 274230f712c9SDave Chinner int state; /* state bits, accessed thru macros */ 274330f712c9SDave Chinner xfs_filblks_t temp=0; /* temp for indirect calculations */ 274430f712c9SDave Chinner 2745be51f811SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 274630f712c9SDave Chinner state = 0; 2747be51f811SDarrick J. Wong if (whichfork == XFS_COW_FORK) 2748be51f811SDarrick J. Wong state |= BMAP_COWFORK; 274930f712c9SDave Chinner ASSERT(isnullstartblock(new->br_startblock)); 275030f712c9SDave Chinner 275130f712c9SDave Chinner /* 275230f712c9SDave Chinner * Check and set flags if this segment has a left neighbor 275330f712c9SDave Chinner */ 275430f712c9SDave Chinner if (*idx > 0) { 275530f712c9SDave Chinner state |= BMAP_LEFT_VALID; 275630f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left); 275730f712c9SDave Chinner 275830f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 275930f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 276030f712c9SDave Chinner } 276130f712c9SDave Chinner 276230f712c9SDave Chinner /* 276330f712c9SDave Chinner * Check and set flags if the current (right) segment exists. 276430f712c9SDave Chinner * If it doesn't exist, we're converting the hole at end-of-file. 276530f712c9SDave Chinner */ 27665d829300SEric Sandeen if (*idx < xfs_iext_count(ifp)) { 276730f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 276830f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right); 276930f712c9SDave Chinner 277030f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 277130f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 277230f712c9SDave Chinner } 277330f712c9SDave Chinner 277430f712c9SDave Chinner /* 277530f712c9SDave Chinner * Set contiguity flags on the left and right neighbors. 277630f712c9SDave Chinner * Don't let extents get too large, even if the pieces are contiguous. 277730f712c9SDave Chinner */ 277830f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && 277930f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 278030f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 278130f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 278230f712c9SDave Chinner 278330f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && 278430f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 278530f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 278630f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 278730f712c9SDave Chinner (left.br_blockcount + new->br_blockcount + 278830f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN))) 278930f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 279030f712c9SDave Chinner 279130f712c9SDave Chinner /* 279230f712c9SDave Chinner * Switch out based on the contiguity flags. 279330f712c9SDave Chinner */ 279430f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 279530f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 279630f712c9SDave Chinner /* 279730f712c9SDave Chinner * New allocation is contiguous with delayed allocations 279830f712c9SDave Chinner * on the left and on the right. 279930f712c9SDave Chinner * Merge all three into a single extent record. 280030f712c9SDave Chinner */ 280130f712c9SDave Chinner --*idx; 280230f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount + 280330f712c9SDave Chinner right.br_blockcount; 280430f712c9SDave Chinner 280530f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 280630f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); 280730f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 280830f712c9SDave Chinner startblockval(new->br_startblock) + 280930f712c9SDave Chinner startblockval(right.br_startblock); 28100e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 28110e339ef8SBrian Foster oldlen); 281230f712c9SDave Chinner xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), 281330f712c9SDave Chinner nullstartblock((int)newlen)); 281430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 281530f712c9SDave Chinner 281630f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 1, state); 281730f712c9SDave Chinner break; 281830f712c9SDave Chinner 281930f712c9SDave Chinner case BMAP_LEFT_CONTIG: 282030f712c9SDave Chinner /* 282130f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 282230f712c9SDave Chinner * on the left. 282330f712c9SDave Chinner * Merge the new allocation with the left neighbor. 282430f712c9SDave Chinner */ 282530f712c9SDave Chinner --*idx; 282630f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount; 282730f712c9SDave Chinner 282830f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 282930f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); 283030f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 283130f712c9SDave Chinner startblockval(new->br_startblock); 28320e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 28330e339ef8SBrian Foster oldlen); 283430f712c9SDave Chinner xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), 283530f712c9SDave Chinner nullstartblock((int)newlen)); 283630f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 283730f712c9SDave Chinner break; 283830f712c9SDave Chinner 283930f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 284030f712c9SDave Chinner /* 284130f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 284230f712c9SDave Chinner * on the right. 284330f712c9SDave Chinner * Merge the new allocation with the right neighbor. 284430f712c9SDave Chinner */ 284530f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 284630f712c9SDave Chinner temp = new->br_blockcount + right.br_blockcount; 284730f712c9SDave Chinner oldlen = startblockval(new->br_startblock) + 284830f712c9SDave Chinner startblockval(right.br_startblock); 28490e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 28500e339ef8SBrian Foster oldlen); 285130f712c9SDave Chinner xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), 285230f712c9SDave Chinner new->br_startoff, 285330f712c9SDave Chinner nullstartblock((int)newlen), temp, right.br_state); 285430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 285530f712c9SDave Chinner break; 285630f712c9SDave Chinner 285730f712c9SDave Chinner case 0: 285830f712c9SDave Chinner /* 285930f712c9SDave Chinner * New allocation is not contiguous with another 286030f712c9SDave Chinner * delayed allocation. 286130f712c9SDave Chinner * Insert a new entry. 286230f712c9SDave Chinner */ 286330f712c9SDave Chinner oldlen = newlen = 0; 286430f712c9SDave Chinner xfs_iext_insert(ip, *idx, 1, new, state); 286530f712c9SDave Chinner break; 286630f712c9SDave Chinner } 286730f712c9SDave Chinner if (oldlen != newlen) { 286830f712c9SDave Chinner ASSERT(oldlen > newlen); 28690d485adaSDave Chinner xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), 28700d485adaSDave Chinner false); 287130f712c9SDave Chinner /* 287230f712c9SDave Chinner * Nothing to do for disk quota accounting here. 287330f712c9SDave Chinner */ 287430f712c9SDave Chinner } 287530f712c9SDave Chinner } 287630f712c9SDave Chinner 287730f712c9SDave Chinner /* 287830f712c9SDave Chinner * Convert a hole to a real allocation. 287930f712c9SDave Chinner */ 288030f712c9SDave Chinner STATIC int /* error */ 288130f712c9SDave Chinner xfs_bmap_add_extent_hole_real( 288230f712c9SDave Chinner struct xfs_bmalloca *bma, 288330f712c9SDave Chinner int whichfork) 288430f712c9SDave Chinner { 288530f712c9SDave Chinner struct xfs_bmbt_irec *new = &bma->got; 288630f712c9SDave Chinner int error; /* error return value */ 288730f712c9SDave Chinner int i; /* temp state */ 288830f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 288930f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 289030f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 289130f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 289230f712c9SDave Chinner int state; /* state bits, accessed thru macros */ 2893c29aad41SEric Sandeen struct xfs_mount *mp; 289430f712c9SDave Chinner 2895f1f96c49SEric Sandeen mp = bma->ip->i_mount; 289630f712c9SDave Chinner ifp = XFS_IFORK_PTR(bma->ip, whichfork); 289730f712c9SDave Chinner 289830f712c9SDave Chinner ASSERT(bma->idx >= 0); 28995d829300SEric Sandeen ASSERT(bma->idx <= xfs_iext_count(ifp)); 290030f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 290130f712c9SDave Chinner ASSERT(!bma->cur || 290230f712c9SDave Chinner !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); 290330f712c9SDave Chinner 2904ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 290530f712c9SDave Chinner 290630f712c9SDave Chinner state = 0; 290730f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK) 290830f712c9SDave Chinner state |= BMAP_ATTRFORK; 2909a14234c7SChristoph Hellwig if (whichfork == XFS_COW_FORK) 2910a14234c7SChristoph Hellwig state |= BMAP_COWFORK; 291130f712c9SDave Chinner 291230f712c9SDave Chinner /* 291330f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 291430f712c9SDave Chinner */ 291530f712c9SDave Chinner if (bma->idx > 0) { 291630f712c9SDave Chinner state |= BMAP_LEFT_VALID; 291730f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left); 291830f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 291930f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 292030f712c9SDave Chinner } 292130f712c9SDave Chinner 292230f712c9SDave Chinner /* 292330f712c9SDave Chinner * Check and set flags if this segment has a current value. 292430f712c9SDave Chinner * Not true if we're inserting into the "hole" at eof. 292530f712c9SDave Chinner */ 29265d829300SEric Sandeen if (bma->idx < xfs_iext_count(ifp)) { 292730f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 292830f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right); 292930f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 293030f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 293130f712c9SDave Chinner } 293230f712c9SDave Chinner 293330f712c9SDave Chinner /* 293430f712c9SDave Chinner * We're inserting a real allocation between "left" and "right". 293530f712c9SDave Chinner * Set the contiguity flags. Don't let extents get too large. 293630f712c9SDave Chinner */ 293730f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 293830f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 293930f712c9SDave Chinner left.br_startblock + left.br_blockcount == new->br_startblock && 294030f712c9SDave Chinner left.br_state == new->br_state && 294130f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 294230f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 294330f712c9SDave Chinner 294430f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 294530f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 294630f712c9SDave Chinner new->br_startblock + new->br_blockcount == right.br_startblock && 294730f712c9SDave Chinner new->br_state == right.br_state && 294830f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 294930f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 295030f712c9SDave Chinner left.br_blockcount + new->br_blockcount + 295130f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN)) 295230f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 295330f712c9SDave Chinner 295430f712c9SDave Chinner error = 0; 295530f712c9SDave Chinner /* 295630f712c9SDave Chinner * Select which case we're in here, and implement it. 295730f712c9SDave Chinner */ 295830f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 295930f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 296030f712c9SDave Chinner /* 296130f712c9SDave Chinner * New allocation is contiguous with real allocations on the 296230f712c9SDave Chinner * left and on the right. 296330f712c9SDave Chinner * Merge all three into a single extent record. 296430f712c9SDave Chinner */ 296530f712c9SDave Chinner --bma->idx; 296630f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 296730f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), 296830f712c9SDave Chinner left.br_blockcount + new->br_blockcount + 296930f712c9SDave Chinner right.br_blockcount); 297030f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 297130f712c9SDave Chinner 297230f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); 297330f712c9SDave Chinner 297430f712c9SDave Chinner XFS_IFORK_NEXT_SET(bma->ip, whichfork, 297530f712c9SDave Chinner XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1); 297630f712c9SDave Chinner if (bma->cur == NULL) { 297730f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 297830f712c9SDave Chinner } else { 297930f712c9SDave Chinner rval = XFS_ILOG_CORE; 298030f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff, 298130f712c9SDave Chinner right.br_startblock, right.br_blockcount, 298230f712c9SDave Chinner &i); 298330f712c9SDave Chinner if (error) 298430f712c9SDave Chinner goto done; 2985c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 298630f712c9SDave Chinner error = xfs_btree_delete(bma->cur, &i); 298730f712c9SDave Chinner if (error) 298830f712c9SDave Chinner goto done; 2989c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 299030f712c9SDave Chinner error = xfs_btree_decrement(bma->cur, 0, &i); 299130f712c9SDave Chinner if (error) 299230f712c9SDave Chinner goto done; 2993c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 299430f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, left.br_startoff, 299530f712c9SDave Chinner left.br_startblock, 299630f712c9SDave Chinner left.br_blockcount + 299730f712c9SDave Chinner new->br_blockcount + 299830f712c9SDave Chinner right.br_blockcount, 299930f712c9SDave Chinner left.br_state); 300030f712c9SDave Chinner if (error) 300130f712c9SDave Chinner goto done; 300230f712c9SDave Chinner } 300330f712c9SDave Chinner break; 300430f712c9SDave Chinner 300530f712c9SDave Chinner case BMAP_LEFT_CONTIG: 300630f712c9SDave Chinner /* 300730f712c9SDave Chinner * New allocation is contiguous with a real allocation 300830f712c9SDave Chinner * on the left. 300930f712c9SDave Chinner * Merge the new allocation with the left neighbor. 301030f712c9SDave Chinner */ 301130f712c9SDave Chinner --bma->idx; 301230f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 301330f712c9SDave Chinner xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), 301430f712c9SDave Chinner left.br_blockcount + new->br_blockcount); 301530f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 301630f712c9SDave Chinner 301730f712c9SDave Chinner if (bma->cur == NULL) { 301830f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 301930f712c9SDave Chinner } else { 302030f712c9SDave Chinner rval = 0; 302130f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff, 302230f712c9SDave Chinner left.br_startblock, left.br_blockcount, 302330f712c9SDave Chinner &i); 302430f712c9SDave Chinner if (error) 302530f712c9SDave Chinner goto done; 3026c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 302730f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, left.br_startoff, 302830f712c9SDave Chinner left.br_startblock, 302930f712c9SDave Chinner left.br_blockcount + 303030f712c9SDave Chinner new->br_blockcount, 303130f712c9SDave Chinner left.br_state); 303230f712c9SDave Chinner if (error) 303330f712c9SDave Chinner goto done; 303430f712c9SDave Chinner } 303530f712c9SDave Chinner break; 303630f712c9SDave Chinner 303730f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 303830f712c9SDave Chinner /* 303930f712c9SDave Chinner * New allocation is contiguous with a real allocation 304030f712c9SDave Chinner * on the right. 304130f712c9SDave Chinner * Merge the new allocation with the right neighbor. 304230f712c9SDave Chinner */ 304330f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 304430f712c9SDave Chinner xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx), 304530f712c9SDave Chinner new->br_startoff, new->br_startblock, 304630f712c9SDave Chinner new->br_blockcount + right.br_blockcount, 304730f712c9SDave Chinner right.br_state); 304830f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 304930f712c9SDave Chinner 305030f712c9SDave Chinner if (bma->cur == NULL) { 305130f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 305230f712c9SDave Chinner } else { 305330f712c9SDave Chinner rval = 0; 305430f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, 305530f712c9SDave Chinner right.br_startoff, 305630f712c9SDave Chinner right.br_startblock, 305730f712c9SDave Chinner right.br_blockcount, &i); 305830f712c9SDave Chinner if (error) 305930f712c9SDave Chinner goto done; 3060c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 306130f712c9SDave Chinner error = xfs_bmbt_update(bma->cur, new->br_startoff, 306230f712c9SDave Chinner new->br_startblock, 306330f712c9SDave Chinner new->br_blockcount + 306430f712c9SDave Chinner right.br_blockcount, 306530f712c9SDave Chinner right.br_state); 306630f712c9SDave Chinner if (error) 306730f712c9SDave Chinner goto done; 306830f712c9SDave Chinner } 306930f712c9SDave Chinner break; 307030f712c9SDave Chinner 307130f712c9SDave Chinner case 0: 307230f712c9SDave Chinner /* 307330f712c9SDave Chinner * New allocation is not contiguous with another 307430f712c9SDave Chinner * real allocation. 307530f712c9SDave Chinner * Insert a new entry. 307630f712c9SDave Chinner */ 307730f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx, 1, new, state); 307830f712c9SDave Chinner XFS_IFORK_NEXT_SET(bma->ip, whichfork, 307930f712c9SDave Chinner XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1); 308030f712c9SDave Chinner if (bma->cur == NULL) { 308130f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 308230f712c9SDave Chinner } else { 308330f712c9SDave Chinner rval = XFS_ILOG_CORE; 308430f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, 308530f712c9SDave Chinner new->br_startoff, 308630f712c9SDave Chinner new->br_startblock, 308730f712c9SDave Chinner new->br_blockcount, &i); 308830f712c9SDave Chinner if (error) 308930f712c9SDave Chinner goto done; 3090c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 309130f712c9SDave Chinner bma->cur->bc_rec.b.br_state = new->br_state; 309230f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 309330f712c9SDave Chinner if (error) 309430f712c9SDave Chinner goto done; 3095c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 309630f712c9SDave Chinner } 309730f712c9SDave Chinner break; 309830f712c9SDave Chinner } 309930f712c9SDave Chinner 31009c194644SDarrick J. Wong /* add reverse mapping */ 31019c194644SDarrick J. Wong error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); 31029c194644SDarrick J. Wong if (error) 31039c194644SDarrick J. Wong goto done; 31049c194644SDarrick J. Wong 310530f712c9SDave Chinner /* convert to a btree if necessary */ 310630f712c9SDave Chinner if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 310730f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 310830f712c9SDave Chinner 310930f712c9SDave Chinner ASSERT(bma->cur == NULL); 311030f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 31112c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 311230f712c9SDave Chinner 0, &tmp_logflags, whichfork); 311330f712c9SDave Chinner bma->logflags |= tmp_logflags; 311430f712c9SDave Chinner if (error) 311530f712c9SDave Chinner goto done; 311630f712c9SDave Chinner } 311730f712c9SDave Chinner 311830f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 311930f712c9SDave Chinner if (bma->cur) 312030f712c9SDave Chinner bma->cur->bc_private.b.allocated = 0; 312130f712c9SDave Chinner 312230f712c9SDave Chinner xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); 312330f712c9SDave Chinner done: 312430f712c9SDave Chinner bma->logflags |= rval; 312530f712c9SDave Chinner return error; 312630f712c9SDave Chinner } 312730f712c9SDave Chinner 312830f712c9SDave Chinner /* 312930f712c9SDave Chinner * Functions used in the extent read, allocate and remove paths 313030f712c9SDave Chinner */ 313130f712c9SDave Chinner 313230f712c9SDave Chinner /* 313330f712c9SDave Chinner * Adjust the size of the new extent based on di_extsize and rt extsize. 313430f712c9SDave Chinner */ 313530f712c9SDave Chinner int 313630f712c9SDave Chinner xfs_bmap_extsize_align( 313730f712c9SDave Chinner xfs_mount_t *mp, 313830f712c9SDave Chinner xfs_bmbt_irec_t *gotp, /* next extent pointer */ 313930f712c9SDave Chinner xfs_bmbt_irec_t *prevp, /* previous extent pointer */ 314030f712c9SDave Chinner xfs_extlen_t extsz, /* align to this extent size */ 314130f712c9SDave Chinner int rt, /* is this a realtime inode? */ 314230f712c9SDave Chinner int eof, /* is extent at end-of-file? */ 314330f712c9SDave Chinner int delay, /* creating delalloc extent? */ 314430f712c9SDave Chinner int convert, /* overwriting unwritten extent? */ 314530f712c9SDave Chinner xfs_fileoff_t *offp, /* in/out: aligned offset */ 314630f712c9SDave Chinner xfs_extlen_t *lenp) /* in/out: aligned length */ 314730f712c9SDave Chinner { 314830f712c9SDave Chinner xfs_fileoff_t orig_off; /* original offset */ 314930f712c9SDave Chinner xfs_extlen_t orig_alen; /* original length */ 315030f712c9SDave Chinner xfs_fileoff_t orig_end; /* original off+len */ 315130f712c9SDave Chinner xfs_fileoff_t nexto; /* next file offset */ 315230f712c9SDave Chinner xfs_fileoff_t prevo; /* previous file offset */ 315330f712c9SDave Chinner xfs_fileoff_t align_off; /* temp for offset */ 315430f712c9SDave Chinner xfs_extlen_t align_alen; /* temp for length */ 315530f712c9SDave Chinner xfs_extlen_t temp; /* temp for calculations */ 315630f712c9SDave Chinner 315730f712c9SDave Chinner if (convert) 315830f712c9SDave Chinner return 0; 315930f712c9SDave Chinner 316030f712c9SDave Chinner orig_off = align_off = *offp; 316130f712c9SDave Chinner orig_alen = align_alen = *lenp; 316230f712c9SDave Chinner orig_end = orig_off + orig_alen; 316330f712c9SDave Chinner 316430f712c9SDave Chinner /* 316530f712c9SDave Chinner * If this request overlaps an existing extent, then don't 316630f712c9SDave Chinner * attempt to perform any additional alignment. 316730f712c9SDave Chinner */ 316830f712c9SDave Chinner if (!delay && !eof && 316930f712c9SDave Chinner (orig_off >= gotp->br_startoff) && 317030f712c9SDave Chinner (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { 317130f712c9SDave Chinner return 0; 317230f712c9SDave Chinner } 317330f712c9SDave Chinner 317430f712c9SDave Chinner /* 317530f712c9SDave Chinner * If the file offset is unaligned vs. the extent size 317630f712c9SDave Chinner * we need to align it. This will be possible unless 317730f712c9SDave Chinner * the file was previously written with a kernel that didn't 317830f712c9SDave Chinner * perform this alignment, or if a truncate shot us in the 317930f712c9SDave Chinner * foot. 318030f712c9SDave Chinner */ 318130f712c9SDave Chinner temp = do_mod(orig_off, extsz); 318230f712c9SDave Chinner if (temp) { 318330f712c9SDave Chinner align_alen += temp; 318430f712c9SDave Chinner align_off -= temp; 318530f712c9SDave Chinner } 31866dea405eSDave Chinner 31876dea405eSDave Chinner /* Same adjustment for the end of the requested area. */ 31886dea405eSDave Chinner temp = (align_alen % extsz); 31896dea405eSDave Chinner if (temp) 319030f712c9SDave Chinner align_alen += extsz - temp; 31916dea405eSDave Chinner 31926dea405eSDave Chinner /* 31936dea405eSDave Chinner * For large extent hint sizes, the aligned extent might be larger than 31946dea405eSDave Chinner * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls 31956dea405eSDave Chinner * the length back under MAXEXTLEN. The outer allocation loops handle 31966dea405eSDave Chinner * short allocation just fine, so it is safe to do this. We only want to 31976dea405eSDave Chinner * do it when we are forced to, though, because it means more allocation 31986dea405eSDave Chinner * operations are required. 31996dea405eSDave Chinner */ 32006dea405eSDave Chinner while (align_alen > MAXEXTLEN) 32016dea405eSDave Chinner align_alen -= extsz; 32026dea405eSDave Chinner ASSERT(align_alen <= MAXEXTLEN); 32036dea405eSDave Chinner 320430f712c9SDave Chinner /* 320530f712c9SDave Chinner * If the previous block overlaps with this proposed allocation 320630f712c9SDave Chinner * then move the start forward without adjusting the length. 320730f712c9SDave Chinner */ 320830f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) { 320930f712c9SDave Chinner if (prevp->br_startblock == HOLESTARTBLOCK) 321030f712c9SDave Chinner prevo = prevp->br_startoff; 321130f712c9SDave Chinner else 321230f712c9SDave Chinner prevo = prevp->br_startoff + prevp->br_blockcount; 321330f712c9SDave Chinner } else 321430f712c9SDave Chinner prevo = 0; 321530f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 321630f712c9SDave Chinner align_off = prevo; 321730f712c9SDave Chinner /* 321830f712c9SDave Chinner * If the next block overlaps with this proposed allocation 321930f712c9SDave Chinner * then move the start back without adjusting the length, 322030f712c9SDave Chinner * but not before offset 0. 322130f712c9SDave Chinner * This may of course make the start overlap previous block, 322230f712c9SDave Chinner * and if we hit the offset 0 limit then the next block 322330f712c9SDave Chinner * can still overlap too. 322430f712c9SDave Chinner */ 322530f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) { 322630f712c9SDave Chinner if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || 322730f712c9SDave Chinner (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) 322830f712c9SDave Chinner nexto = gotp->br_startoff + gotp->br_blockcount; 322930f712c9SDave Chinner else 323030f712c9SDave Chinner nexto = gotp->br_startoff; 323130f712c9SDave Chinner } else 323230f712c9SDave Chinner nexto = NULLFILEOFF; 323330f712c9SDave Chinner if (!eof && 323430f712c9SDave Chinner align_off + align_alen != orig_end && 323530f712c9SDave Chinner align_off + align_alen > nexto) 323630f712c9SDave Chinner align_off = nexto > align_alen ? nexto - align_alen : 0; 323730f712c9SDave Chinner /* 323830f712c9SDave Chinner * If we're now overlapping the next or previous extent that 323930f712c9SDave Chinner * means we can't fit an extsz piece in this hole. Just move 324030f712c9SDave Chinner * the start forward to the first valid spot and set 324130f712c9SDave Chinner * the length so we hit the end. 324230f712c9SDave Chinner */ 324330f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 324430f712c9SDave Chinner align_off = prevo; 324530f712c9SDave Chinner if (align_off + align_alen != orig_end && 324630f712c9SDave Chinner align_off + align_alen > nexto && 324730f712c9SDave Chinner nexto != NULLFILEOFF) { 324830f712c9SDave Chinner ASSERT(nexto > prevo); 324930f712c9SDave Chinner align_alen = nexto - align_off; 325030f712c9SDave Chinner } 325130f712c9SDave Chinner 325230f712c9SDave Chinner /* 325330f712c9SDave Chinner * If realtime, and the result isn't a multiple of the realtime 325430f712c9SDave Chinner * extent size we need to remove blocks until it is. 325530f712c9SDave Chinner */ 325630f712c9SDave Chinner if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { 325730f712c9SDave Chinner /* 325830f712c9SDave Chinner * We're not covering the original request, or 325930f712c9SDave Chinner * we won't be able to once we fix the length. 326030f712c9SDave Chinner */ 326130f712c9SDave Chinner if (orig_off < align_off || 326230f712c9SDave Chinner orig_end > align_off + align_alen || 326330f712c9SDave Chinner align_alen - temp < orig_alen) 32642451337dSDave Chinner return -EINVAL; 326530f712c9SDave Chinner /* 326630f712c9SDave Chinner * Try to fix it by moving the start up. 326730f712c9SDave Chinner */ 326830f712c9SDave Chinner if (align_off + temp <= orig_off) { 326930f712c9SDave Chinner align_alen -= temp; 327030f712c9SDave Chinner align_off += temp; 327130f712c9SDave Chinner } 327230f712c9SDave Chinner /* 327330f712c9SDave Chinner * Try to fix it by moving the end in. 327430f712c9SDave Chinner */ 327530f712c9SDave Chinner else if (align_off + align_alen - temp >= orig_end) 327630f712c9SDave Chinner align_alen -= temp; 327730f712c9SDave Chinner /* 327830f712c9SDave Chinner * Set the start to the minimum then trim the length. 327930f712c9SDave Chinner */ 328030f712c9SDave Chinner else { 328130f712c9SDave Chinner align_alen -= orig_off - align_off; 328230f712c9SDave Chinner align_off = orig_off; 328330f712c9SDave Chinner align_alen -= align_alen % mp->m_sb.sb_rextsize; 328430f712c9SDave Chinner } 328530f712c9SDave Chinner /* 328630f712c9SDave Chinner * Result doesn't cover the request, fail it. 328730f712c9SDave Chinner */ 328830f712c9SDave Chinner if (orig_off < align_off || orig_end > align_off + align_alen) 32892451337dSDave Chinner return -EINVAL; 329030f712c9SDave Chinner } else { 329130f712c9SDave Chinner ASSERT(orig_off >= align_off); 32926dea405eSDave Chinner /* see MAXEXTLEN handling above */ 32936dea405eSDave Chinner ASSERT(orig_end <= align_off + align_alen || 32946dea405eSDave Chinner align_alen + extsz > MAXEXTLEN); 329530f712c9SDave Chinner } 329630f712c9SDave Chinner 329730f712c9SDave Chinner #ifdef DEBUG 329830f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) 329930f712c9SDave Chinner ASSERT(align_off + align_alen <= gotp->br_startoff); 330030f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) 330130f712c9SDave Chinner ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); 330230f712c9SDave Chinner #endif 330330f712c9SDave Chinner 330430f712c9SDave Chinner *lenp = align_alen; 330530f712c9SDave Chinner *offp = align_off; 330630f712c9SDave Chinner return 0; 330730f712c9SDave Chinner } 330830f712c9SDave Chinner 330930f712c9SDave Chinner #define XFS_ALLOC_GAP_UNITS 4 331030f712c9SDave Chinner 331130f712c9SDave Chinner void 331230f712c9SDave Chinner xfs_bmap_adjacent( 331330f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 331430f712c9SDave Chinner { 331530f712c9SDave Chinner xfs_fsblock_t adjust; /* adjustment to block numbers */ 331630f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 331730f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 331830f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 331930f712c9SDave Chinner int rt; /* true if inode is realtime */ 332030f712c9SDave Chinner 332130f712c9SDave Chinner #define ISVALID(x,y) \ 332230f712c9SDave Chinner (rt ? \ 332330f712c9SDave Chinner (x) < mp->m_sb.sb_rblocks : \ 332430f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ 332530f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ 332630f712c9SDave Chinner XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) 332730f712c9SDave Chinner 332830f712c9SDave Chinner mp = ap->ip->i_mount; 332930f712c9SDave Chinner nullfb = *ap->firstblock == NULLFSBLOCK; 3330292378edSDave Chinner rt = XFS_IS_REALTIME_INODE(ap->ip) && 3331292378edSDave Chinner xfs_alloc_is_userdata(ap->datatype); 333230f712c9SDave Chinner fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); 333330f712c9SDave Chinner /* 333430f712c9SDave Chinner * If allocating at eof, and there's a previous real block, 333530f712c9SDave Chinner * try to use its last block as our starting point. 333630f712c9SDave Chinner */ 333730f712c9SDave Chinner if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && 333830f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 333930f712c9SDave Chinner ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, 334030f712c9SDave Chinner ap->prev.br_startblock)) { 334130f712c9SDave Chinner ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; 334230f712c9SDave Chinner /* 334330f712c9SDave Chinner * Adjust for the gap between prevp and us. 334430f712c9SDave Chinner */ 334530f712c9SDave Chinner adjust = ap->offset - 334630f712c9SDave Chinner (ap->prev.br_startoff + ap->prev.br_blockcount); 334730f712c9SDave Chinner if (adjust && 334830f712c9SDave Chinner ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) 334930f712c9SDave Chinner ap->blkno += adjust; 335030f712c9SDave Chinner } 335130f712c9SDave Chinner /* 335230f712c9SDave Chinner * If not at eof, then compare the two neighbor blocks. 335330f712c9SDave Chinner * Figure out whether either one gives us a good starting point, 335430f712c9SDave Chinner * and pick the better one. 335530f712c9SDave Chinner */ 335630f712c9SDave Chinner else if (!ap->eof) { 335730f712c9SDave Chinner xfs_fsblock_t gotbno; /* right side block number */ 335830f712c9SDave Chinner xfs_fsblock_t gotdiff=0; /* right side difference */ 335930f712c9SDave Chinner xfs_fsblock_t prevbno; /* left side block number */ 336030f712c9SDave Chinner xfs_fsblock_t prevdiff=0; /* left side difference */ 336130f712c9SDave Chinner 336230f712c9SDave Chinner /* 336330f712c9SDave Chinner * If there's a previous (left) block, select a requested 336430f712c9SDave Chinner * start block based on it. 336530f712c9SDave Chinner */ 336630f712c9SDave Chinner if (ap->prev.br_startoff != NULLFILEOFF && 336730f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 336830f712c9SDave Chinner (prevbno = ap->prev.br_startblock + 336930f712c9SDave Chinner ap->prev.br_blockcount) && 337030f712c9SDave Chinner ISVALID(prevbno, ap->prev.br_startblock)) { 337130f712c9SDave Chinner /* 337230f712c9SDave Chinner * Calculate gap to end of previous block. 337330f712c9SDave Chinner */ 337430f712c9SDave Chinner adjust = prevdiff = ap->offset - 337530f712c9SDave Chinner (ap->prev.br_startoff + 337630f712c9SDave Chinner ap->prev.br_blockcount); 337730f712c9SDave Chinner /* 337830f712c9SDave Chinner * Figure the startblock based on the previous block's 337930f712c9SDave Chinner * end and the gap size. 338030f712c9SDave Chinner * Heuristic! 338130f712c9SDave Chinner * If the gap is large relative to the piece we're 338230f712c9SDave Chinner * allocating, or using it gives us an invalid block 338330f712c9SDave Chinner * number, then just use the end of the previous block. 338430f712c9SDave Chinner */ 338530f712c9SDave Chinner if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 338630f712c9SDave Chinner ISVALID(prevbno + prevdiff, 338730f712c9SDave Chinner ap->prev.br_startblock)) 338830f712c9SDave Chinner prevbno += adjust; 338930f712c9SDave Chinner else 339030f712c9SDave Chinner prevdiff += adjust; 339130f712c9SDave Chinner /* 339230f712c9SDave Chinner * If the firstblock forbids it, can't use it, 339330f712c9SDave Chinner * must use default. 339430f712c9SDave Chinner */ 339530f712c9SDave Chinner if (!rt && !nullfb && 339630f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) 339730f712c9SDave Chinner prevbno = NULLFSBLOCK; 339830f712c9SDave Chinner } 339930f712c9SDave Chinner /* 340030f712c9SDave Chinner * No previous block or can't follow it, just default. 340130f712c9SDave Chinner */ 340230f712c9SDave Chinner else 340330f712c9SDave Chinner prevbno = NULLFSBLOCK; 340430f712c9SDave Chinner /* 340530f712c9SDave Chinner * If there's a following (right) block, select a requested 340630f712c9SDave Chinner * start block based on it. 340730f712c9SDave Chinner */ 340830f712c9SDave Chinner if (!isnullstartblock(ap->got.br_startblock)) { 340930f712c9SDave Chinner /* 341030f712c9SDave Chinner * Calculate gap to start of next block. 341130f712c9SDave Chinner */ 341230f712c9SDave Chinner adjust = gotdiff = ap->got.br_startoff - ap->offset; 341330f712c9SDave Chinner /* 341430f712c9SDave Chinner * Figure the startblock based on the next block's 341530f712c9SDave Chinner * start and the gap size. 341630f712c9SDave Chinner */ 341730f712c9SDave Chinner gotbno = ap->got.br_startblock; 341830f712c9SDave Chinner /* 341930f712c9SDave Chinner * Heuristic! 342030f712c9SDave Chinner * If the gap is large relative to the piece we're 342130f712c9SDave Chinner * allocating, or using it gives us an invalid block 342230f712c9SDave Chinner * number, then just use the start of the next block 342330f712c9SDave Chinner * offset by our length. 342430f712c9SDave Chinner */ 342530f712c9SDave Chinner if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 342630f712c9SDave Chinner ISVALID(gotbno - gotdiff, gotbno)) 342730f712c9SDave Chinner gotbno -= adjust; 342830f712c9SDave Chinner else if (ISVALID(gotbno - ap->length, gotbno)) { 342930f712c9SDave Chinner gotbno -= ap->length; 343030f712c9SDave Chinner gotdiff += adjust - ap->length; 343130f712c9SDave Chinner } else 343230f712c9SDave Chinner gotdiff += adjust; 343330f712c9SDave Chinner /* 343430f712c9SDave Chinner * If the firstblock forbids it, can't use it, 343530f712c9SDave Chinner * must use default. 343630f712c9SDave Chinner */ 343730f712c9SDave Chinner if (!rt && !nullfb && 343830f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) 343930f712c9SDave Chinner gotbno = NULLFSBLOCK; 344030f712c9SDave Chinner } 344130f712c9SDave Chinner /* 344230f712c9SDave Chinner * No next block, just default. 344330f712c9SDave Chinner */ 344430f712c9SDave Chinner else 344530f712c9SDave Chinner gotbno = NULLFSBLOCK; 344630f712c9SDave Chinner /* 344730f712c9SDave Chinner * If both valid, pick the better one, else the only good 344830f712c9SDave Chinner * one, else ap->blkno is already set (to 0 or the inode block). 344930f712c9SDave Chinner */ 345030f712c9SDave Chinner if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) 345130f712c9SDave Chinner ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; 345230f712c9SDave Chinner else if (prevbno != NULLFSBLOCK) 345330f712c9SDave Chinner ap->blkno = prevbno; 345430f712c9SDave Chinner else if (gotbno != NULLFSBLOCK) 345530f712c9SDave Chinner ap->blkno = gotbno; 345630f712c9SDave Chinner } 345730f712c9SDave Chinner #undef ISVALID 345830f712c9SDave Chinner } 345930f712c9SDave Chinner 346030f712c9SDave Chinner static int 346130f712c9SDave Chinner xfs_bmap_longest_free_extent( 346230f712c9SDave Chinner struct xfs_trans *tp, 346330f712c9SDave Chinner xfs_agnumber_t ag, 346430f712c9SDave Chinner xfs_extlen_t *blen, 346530f712c9SDave Chinner int *notinit) 346630f712c9SDave Chinner { 346730f712c9SDave Chinner struct xfs_mount *mp = tp->t_mountp; 346830f712c9SDave Chinner struct xfs_perag *pag; 346930f712c9SDave Chinner xfs_extlen_t longest; 347030f712c9SDave Chinner int error = 0; 347130f712c9SDave Chinner 347230f712c9SDave Chinner pag = xfs_perag_get(mp, ag); 347330f712c9SDave Chinner if (!pag->pagf_init) { 347430f712c9SDave Chinner error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); 347530f712c9SDave Chinner if (error) 347630f712c9SDave Chinner goto out; 347730f712c9SDave Chinner 347830f712c9SDave Chinner if (!pag->pagf_init) { 347930f712c9SDave Chinner *notinit = 1; 348030f712c9SDave Chinner goto out; 348130f712c9SDave Chinner } 348230f712c9SDave Chinner } 348330f712c9SDave Chinner 348450adbcb4SDave Chinner longest = xfs_alloc_longest_free_extent(mp, pag, 34853fd129b6SDarrick J. Wong xfs_alloc_min_freelist(mp, pag), 34863fd129b6SDarrick J. Wong xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE)); 348730f712c9SDave Chinner if (*blen < longest) 348830f712c9SDave Chinner *blen = longest; 348930f712c9SDave Chinner 349030f712c9SDave Chinner out: 349130f712c9SDave Chinner xfs_perag_put(pag); 349230f712c9SDave Chinner return error; 349330f712c9SDave Chinner } 349430f712c9SDave Chinner 349530f712c9SDave Chinner static void 349630f712c9SDave Chinner xfs_bmap_select_minlen( 349730f712c9SDave Chinner struct xfs_bmalloca *ap, 349830f712c9SDave Chinner struct xfs_alloc_arg *args, 349930f712c9SDave Chinner xfs_extlen_t *blen, 350030f712c9SDave Chinner int notinit) 350130f712c9SDave Chinner { 350230f712c9SDave Chinner if (notinit || *blen < ap->minlen) { 350330f712c9SDave Chinner /* 350430f712c9SDave Chinner * Since we did a BUF_TRYLOCK above, it is possible that 350530f712c9SDave Chinner * there is space for this request. 350630f712c9SDave Chinner */ 350730f712c9SDave Chinner args->minlen = ap->minlen; 350830f712c9SDave Chinner } else if (*blen < args->maxlen) { 350930f712c9SDave Chinner /* 351030f712c9SDave Chinner * If the best seen length is less than the request length, 351130f712c9SDave Chinner * use the best as the minimum. 351230f712c9SDave Chinner */ 351330f712c9SDave Chinner args->minlen = *blen; 351430f712c9SDave Chinner } else { 351530f712c9SDave Chinner /* 351630f712c9SDave Chinner * Otherwise we've seen an extent as big as maxlen, use that 351730f712c9SDave Chinner * as the minimum. 351830f712c9SDave Chinner */ 351930f712c9SDave Chinner args->minlen = args->maxlen; 352030f712c9SDave Chinner } 352130f712c9SDave Chinner } 352230f712c9SDave Chinner 352330f712c9SDave Chinner STATIC int 352430f712c9SDave Chinner xfs_bmap_btalloc_nullfb( 352530f712c9SDave Chinner struct xfs_bmalloca *ap, 352630f712c9SDave Chinner struct xfs_alloc_arg *args, 352730f712c9SDave Chinner xfs_extlen_t *blen) 352830f712c9SDave Chinner { 352930f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 353030f712c9SDave Chinner xfs_agnumber_t ag, startag; 353130f712c9SDave Chinner int notinit = 0; 353230f712c9SDave Chinner int error; 353330f712c9SDave Chinner 353430f712c9SDave Chinner args->type = XFS_ALLOCTYPE_START_BNO; 353530f712c9SDave Chinner args->total = ap->total; 353630f712c9SDave Chinner 353730f712c9SDave Chinner startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 353830f712c9SDave Chinner if (startag == NULLAGNUMBER) 353930f712c9SDave Chinner startag = ag = 0; 354030f712c9SDave Chinner 354130f712c9SDave Chinner while (*blen < args->maxlen) { 354230f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 354330f712c9SDave Chinner ¬init); 354430f712c9SDave Chinner if (error) 354530f712c9SDave Chinner return error; 354630f712c9SDave Chinner 354730f712c9SDave Chinner if (++ag == mp->m_sb.sb_agcount) 354830f712c9SDave Chinner ag = 0; 354930f712c9SDave Chinner if (ag == startag) 355030f712c9SDave Chinner break; 355130f712c9SDave Chinner } 355230f712c9SDave Chinner 355330f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 355430f712c9SDave Chinner return 0; 355530f712c9SDave Chinner } 355630f712c9SDave Chinner 355730f712c9SDave Chinner STATIC int 355830f712c9SDave Chinner xfs_bmap_btalloc_filestreams( 355930f712c9SDave Chinner struct xfs_bmalloca *ap, 356030f712c9SDave Chinner struct xfs_alloc_arg *args, 356130f712c9SDave Chinner xfs_extlen_t *blen) 356230f712c9SDave Chinner { 356330f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 356430f712c9SDave Chinner xfs_agnumber_t ag; 356530f712c9SDave Chinner int notinit = 0; 356630f712c9SDave Chinner int error; 356730f712c9SDave Chinner 356830f712c9SDave Chinner args->type = XFS_ALLOCTYPE_NEAR_BNO; 356930f712c9SDave Chinner args->total = ap->total; 357030f712c9SDave Chinner 357130f712c9SDave Chinner ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 357230f712c9SDave Chinner if (ag == NULLAGNUMBER) 357330f712c9SDave Chinner ag = 0; 357430f712c9SDave Chinner 357530f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); 357630f712c9SDave Chinner if (error) 357730f712c9SDave Chinner return error; 357830f712c9SDave Chinner 357930f712c9SDave Chinner if (*blen < args->maxlen) { 358030f712c9SDave Chinner error = xfs_filestream_new_ag(ap, &ag); 358130f712c9SDave Chinner if (error) 358230f712c9SDave Chinner return error; 358330f712c9SDave Chinner 358430f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 358530f712c9SDave Chinner ¬init); 358630f712c9SDave Chinner if (error) 358730f712c9SDave Chinner return error; 358830f712c9SDave Chinner 358930f712c9SDave Chinner } 359030f712c9SDave Chinner 359130f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 359230f712c9SDave Chinner 359330f712c9SDave Chinner /* 359430f712c9SDave Chinner * Set the failure fallback case to look in the selected AG as stream 359530f712c9SDave Chinner * may have moved. 359630f712c9SDave Chinner */ 359730f712c9SDave Chinner ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); 359830f712c9SDave Chinner return 0; 359930f712c9SDave Chinner } 360030f712c9SDave Chinner 360130f712c9SDave Chinner STATIC int 360230f712c9SDave Chinner xfs_bmap_btalloc( 360330f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 360430f712c9SDave Chinner { 360530f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 360630f712c9SDave Chinner xfs_alloctype_t atype = 0; /* type for allocation routines */ 3607292378edSDave Chinner xfs_extlen_t align = 0; /* minimum allocation alignment */ 360830f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 360930f712c9SDave Chinner xfs_agnumber_t ag; 361030f712c9SDave Chinner xfs_alloc_arg_t args; 361130f712c9SDave Chinner xfs_extlen_t blen; 361230f712c9SDave Chinner xfs_extlen_t nextminlen = 0; 361330f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 361430f712c9SDave Chinner int isaligned; 361530f712c9SDave Chinner int tryagain; 361630f712c9SDave Chinner int error; 361730f712c9SDave Chinner int stripe_align; 361830f712c9SDave Chinner 361930f712c9SDave Chinner ASSERT(ap->length); 362030f712c9SDave Chinner 362130f712c9SDave Chinner mp = ap->ip->i_mount; 362230f712c9SDave Chinner 362330f712c9SDave Chinner /* stripe alignment for allocation is determined by mount parameters */ 362430f712c9SDave Chinner stripe_align = 0; 362530f712c9SDave Chinner if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) 362630f712c9SDave Chinner stripe_align = mp->m_swidth; 362730f712c9SDave Chinner else if (mp->m_dalign) 362830f712c9SDave Chinner stripe_align = mp->m_dalign; 362930f712c9SDave Chinner 3630f7ca3522SDarrick J. Wong if (ap->flags & XFS_BMAPI_COWFORK) 3631f7ca3522SDarrick J. Wong align = xfs_get_cowextsz_hint(ap->ip); 3632f7ca3522SDarrick J. Wong else if (xfs_alloc_is_userdata(ap->datatype)) 3633292378edSDave Chinner align = xfs_get_extsz_hint(ap->ip); 3634493611ebSChristoph Hellwig if (align) { 363530f712c9SDave Chinner error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, 363630f712c9SDave Chinner align, 0, ap->eof, 0, ap->conv, 363730f712c9SDave Chinner &ap->offset, &ap->length); 363830f712c9SDave Chinner ASSERT(!error); 363930f712c9SDave Chinner ASSERT(ap->length); 364030f712c9SDave Chinner } 364130f712c9SDave Chinner 364230f712c9SDave Chinner 364330f712c9SDave Chinner nullfb = *ap->firstblock == NULLFSBLOCK; 364430f712c9SDave Chinner fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); 364530f712c9SDave Chinner if (nullfb) { 3646292378edSDave Chinner if (xfs_alloc_is_userdata(ap->datatype) && 3647292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) { 364830f712c9SDave Chinner ag = xfs_filestream_lookup_ag(ap->ip); 364930f712c9SDave Chinner ag = (ag != NULLAGNUMBER) ? ag : 0; 365030f712c9SDave Chinner ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); 365130f712c9SDave Chinner } else { 365230f712c9SDave Chinner ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); 365330f712c9SDave Chinner } 365430f712c9SDave Chinner } else 365530f712c9SDave Chinner ap->blkno = *ap->firstblock; 365630f712c9SDave Chinner 365730f712c9SDave Chinner xfs_bmap_adjacent(ap); 365830f712c9SDave Chinner 365930f712c9SDave Chinner /* 366030f712c9SDave Chinner * If allowed, use ap->blkno; otherwise must use firstblock since 366130f712c9SDave Chinner * it's in the right allocation group. 366230f712c9SDave Chinner */ 366330f712c9SDave Chinner if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) 366430f712c9SDave Chinner ; 366530f712c9SDave Chinner else 366630f712c9SDave Chinner ap->blkno = *ap->firstblock; 366730f712c9SDave Chinner /* 366830f712c9SDave Chinner * Normal allocation, done through xfs_alloc_vextent. 366930f712c9SDave Chinner */ 367030f712c9SDave Chinner tryagain = isaligned = 0; 367130f712c9SDave Chinner memset(&args, 0, sizeof(args)); 367230f712c9SDave Chinner args.tp = ap->tp; 367330f712c9SDave Chinner args.mp = mp; 367430f712c9SDave Chinner args.fsbno = ap->blkno; 3675340785ccSDarrick J. Wong xfs_rmap_skip_owner_update(&args.oinfo); 367630f712c9SDave Chinner 367730f712c9SDave Chinner /* Trim the allocation back to the maximum an AG can fit. */ 367852548852SDarrick J. Wong args.maxlen = MIN(ap->length, mp->m_ag_max_usable); 367930f712c9SDave Chinner args.firstblock = *ap->firstblock; 368030f712c9SDave Chinner blen = 0; 368130f712c9SDave Chinner if (nullfb) { 368230f712c9SDave Chinner /* 368330f712c9SDave Chinner * Search for an allocation group with a single extent large 368430f712c9SDave Chinner * enough for the request. If one isn't found, then adjust 368530f712c9SDave Chinner * the minimum allocation size to the largest space found. 368630f712c9SDave Chinner */ 3687292378edSDave Chinner if (xfs_alloc_is_userdata(ap->datatype) && 3688292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) 368930f712c9SDave Chinner error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); 369030f712c9SDave Chinner else 369130f712c9SDave Chinner error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); 369230f712c9SDave Chinner if (error) 369330f712c9SDave Chinner return error; 36942c3234d1SDarrick J. Wong } else if (ap->dfops->dop_low) { 369530f712c9SDave Chinner if (xfs_inode_is_filestream(ap->ip)) 369630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 369730f712c9SDave Chinner else 369830f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 369930f712c9SDave Chinner args.total = args.minlen = ap->minlen; 370030f712c9SDave Chinner } else { 370130f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 370230f712c9SDave Chinner args.total = ap->total; 370330f712c9SDave Chinner args.minlen = ap->minlen; 370430f712c9SDave Chinner } 370530f712c9SDave Chinner /* apply extent size hints if obtained earlier */ 3706493611ebSChristoph Hellwig if (align) { 370730f712c9SDave Chinner args.prod = align; 370830f712c9SDave Chinner if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) 370930f712c9SDave Chinner args.mod = (xfs_extlen_t)(args.prod - args.mod); 371009cbfeafSKirill A. Shutemov } else if (mp->m_sb.sb_blocksize >= PAGE_SIZE) { 371130f712c9SDave Chinner args.prod = 1; 371230f712c9SDave Chinner args.mod = 0; 371330f712c9SDave Chinner } else { 371409cbfeafSKirill A. Shutemov args.prod = PAGE_SIZE >> mp->m_sb.sb_blocklog; 371530f712c9SDave Chinner if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) 371630f712c9SDave Chinner args.mod = (xfs_extlen_t)(args.prod - args.mod); 371730f712c9SDave Chinner } 371830f712c9SDave Chinner /* 371930f712c9SDave Chinner * If we are not low on available data blocks, and the 372030f712c9SDave Chinner * underlying logical volume manager is a stripe, and 372130f712c9SDave Chinner * the file offset is zero then try to allocate data 372230f712c9SDave Chinner * blocks on stripe unit boundary. 372330f712c9SDave Chinner * NOTE: ap->aeof is only set if the allocation length 372430f712c9SDave Chinner * is >= the stripe unit and the allocation offset is 372530f712c9SDave Chinner * at the end of file. 372630f712c9SDave Chinner */ 37272c3234d1SDarrick J. Wong if (!ap->dfops->dop_low && ap->aeof) { 372830f712c9SDave Chinner if (!ap->offset) { 372930f712c9SDave Chinner args.alignment = stripe_align; 373030f712c9SDave Chinner atype = args.type; 373130f712c9SDave Chinner isaligned = 1; 373230f712c9SDave Chinner /* 373330f712c9SDave Chinner * Adjust for alignment 373430f712c9SDave Chinner */ 373530f712c9SDave Chinner if (blen > args.alignment && blen <= args.maxlen) 373630f712c9SDave Chinner args.minlen = blen - args.alignment; 373730f712c9SDave Chinner args.minalignslop = 0; 373830f712c9SDave Chinner } else { 373930f712c9SDave Chinner /* 374030f712c9SDave Chinner * First try an exact bno allocation. 374130f712c9SDave Chinner * If it fails then do a near or start bno 374230f712c9SDave Chinner * allocation with alignment turned on. 374330f712c9SDave Chinner */ 374430f712c9SDave Chinner atype = args.type; 374530f712c9SDave Chinner tryagain = 1; 374630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_THIS_BNO; 374730f712c9SDave Chinner args.alignment = 1; 374830f712c9SDave Chinner /* 374930f712c9SDave Chinner * Compute the minlen+alignment for the 375030f712c9SDave Chinner * next case. Set slop so that the value 375130f712c9SDave Chinner * of minlen+alignment+slop doesn't go up 375230f712c9SDave Chinner * between the calls. 375330f712c9SDave Chinner */ 375430f712c9SDave Chinner if (blen > stripe_align && blen <= args.maxlen) 375530f712c9SDave Chinner nextminlen = blen - stripe_align; 375630f712c9SDave Chinner else 375730f712c9SDave Chinner nextminlen = args.minlen; 375830f712c9SDave Chinner if (nextminlen + stripe_align > args.minlen + 1) 375930f712c9SDave Chinner args.minalignslop = 376030f712c9SDave Chinner nextminlen + stripe_align - 376130f712c9SDave Chinner args.minlen - 1; 376230f712c9SDave Chinner else 376330f712c9SDave Chinner args.minalignslop = 0; 376430f712c9SDave Chinner } 376530f712c9SDave Chinner } else { 376630f712c9SDave Chinner args.alignment = 1; 376730f712c9SDave Chinner args.minalignslop = 0; 376830f712c9SDave Chinner } 376930f712c9SDave Chinner args.minleft = ap->minleft; 377030f712c9SDave Chinner args.wasdel = ap->wasdel; 37713fd129b6SDarrick J. Wong args.resv = XFS_AG_RESV_NONE; 3772292378edSDave Chinner args.datatype = ap->datatype; 3773292378edSDave Chinner if (ap->datatype & XFS_ALLOC_USERDATA_ZERO) 37743fbbbea3SDave Chinner args.ip = ap->ip; 37753fbbbea3SDave Chinner 37763fbbbea3SDave Chinner error = xfs_alloc_vextent(&args); 37773fbbbea3SDave Chinner if (error) 377830f712c9SDave Chinner return error; 37793fbbbea3SDave Chinner 378030f712c9SDave Chinner if (tryagain && args.fsbno == NULLFSBLOCK) { 378130f712c9SDave Chinner /* 378230f712c9SDave Chinner * Exact allocation failed. Now try with alignment 378330f712c9SDave Chinner * turned on. 378430f712c9SDave Chinner */ 378530f712c9SDave Chinner args.type = atype; 378630f712c9SDave Chinner args.fsbno = ap->blkno; 378730f712c9SDave Chinner args.alignment = stripe_align; 378830f712c9SDave Chinner args.minlen = nextminlen; 378930f712c9SDave Chinner args.minalignslop = 0; 379030f712c9SDave Chinner isaligned = 1; 379130f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 379230f712c9SDave Chinner return error; 379330f712c9SDave Chinner } 379430f712c9SDave Chinner if (isaligned && args.fsbno == NULLFSBLOCK) { 379530f712c9SDave Chinner /* 379630f712c9SDave Chinner * allocation failed, so turn off alignment and 379730f712c9SDave Chinner * try again. 379830f712c9SDave Chinner */ 379930f712c9SDave Chinner args.type = atype; 380030f712c9SDave Chinner args.fsbno = ap->blkno; 380130f712c9SDave Chinner args.alignment = 0; 380230f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 380330f712c9SDave Chinner return error; 380430f712c9SDave Chinner } 380530f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb && 380630f712c9SDave Chinner args.minlen > ap->minlen) { 380730f712c9SDave Chinner args.minlen = ap->minlen; 380830f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 380930f712c9SDave Chinner args.fsbno = ap->blkno; 381030f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 381130f712c9SDave Chinner return error; 381230f712c9SDave Chinner } 381330f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb) { 381430f712c9SDave Chinner args.fsbno = 0; 381530f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 381630f712c9SDave Chinner args.total = ap->minlen; 381730f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 381830f712c9SDave Chinner return error; 38192c3234d1SDarrick J. Wong ap->dfops->dop_low = true; 382030f712c9SDave Chinner } 382130f712c9SDave Chinner if (args.fsbno != NULLFSBLOCK) { 382230f712c9SDave Chinner /* 382330f712c9SDave Chinner * check the allocation happened at the same or higher AG than 382430f712c9SDave Chinner * the first block that was allocated. 382530f712c9SDave Chinner */ 382630f712c9SDave Chinner ASSERT(*ap->firstblock == NULLFSBLOCK || 3827410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, *ap->firstblock) <= 3828410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, args.fsbno)); 382930f712c9SDave Chinner 383030f712c9SDave Chinner ap->blkno = args.fsbno; 383130f712c9SDave Chinner if (*ap->firstblock == NULLFSBLOCK) 383230f712c9SDave Chinner *ap->firstblock = args.fsbno; 3833410d17f6SChristoph Hellwig ASSERT(nullfb || fb_agno <= args.agno); 383430f712c9SDave Chinner ap->length = args.len; 383560b4984fSDarrick J. Wong if (!(ap->flags & XFS_BMAPI_COWFORK)) 383630f712c9SDave Chinner ap->ip->i_d.di_nblocks += args.len; 383730f712c9SDave Chinner xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); 383830f712c9SDave Chinner if (ap->wasdel) 383930f712c9SDave Chinner ap->ip->i_delayed_blks -= args.len; 384030f712c9SDave Chinner /* 384130f712c9SDave Chinner * Adjust the disk quota also. This was reserved 384230f712c9SDave Chinner * earlier. 384330f712c9SDave Chinner */ 384430f712c9SDave Chinner xfs_trans_mod_dquot_byino(ap->tp, ap->ip, 384530f712c9SDave Chinner ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : 384630f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 384730f712c9SDave Chinner (long) args.len); 384830f712c9SDave Chinner } else { 384930f712c9SDave Chinner ap->blkno = NULLFSBLOCK; 385030f712c9SDave Chinner ap->length = 0; 385130f712c9SDave Chinner } 385230f712c9SDave Chinner return 0; 385330f712c9SDave Chinner } 385430f712c9SDave Chinner 385530f712c9SDave Chinner /* 3856f65306eaSDarrick J. Wong * For a remap operation, just "allocate" an extent at the address that the 3857f65306eaSDarrick J. Wong * caller passed in, and ensure that the AGFL is the right size. The caller 3858f65306eaSDarrick J. Wong * will then map the "allocated" extent into the file somewhere. 3859f65306eaSDarrick J. Wong */ 3860f65306eaSDarrick J. Wong STATIC int 3861f65306eaSDarrick J. Wong xfs_bmap_remap_alloc( 3862f65306eaSDarrick J. Wong struct xfs_bmalloca *ap) 3863f65306eaSDarrick J. Wong { 3864f65306eaSDarrick J. Wong struct xfs_trans *tp = ap->tp; 3865f65306eaSDarrick J. Wong struct xfs_mount *mp = tp->t_mountp; 386652813fb1SChristoph Hellwig xfs_fsblock_t bno; 3867f65306eaSDarrick J. Wong struct xfs_alloc_arg args; 3868f65306eaSDarrick J. Wong int error; 3869f65306eaSDarrick J. Wong 3870f65306eaSDarrick J. Wong /* 3871f65306eaSDarrick J. Wong * validate that the block number is legal - the enables us to detect 3872f65306eaSDarrick J. Wong * and handle a silent filesystem corruption rather than crashing. 3873f65306eaSDarrick J. Wong */ 3874f65306eaSDarrick J. Wong memset(&args, 0, sizeof(struct xfs_alloc_arg)); 3875f65306eaSDarrick J. Wong args.tp = ap->tp; 3876f65306eaSDarrick J. Wong args.mp = ap->tp->t_mountp; 3877f65306eaSDarrick J. Wong bno = *ap->firstblock; 3878f65306eaSDarrick J. Wong args.agno = XFS_FSB_TO_AGNO(mp, bno); 3879f65306eaSDarrick J. Wong args.agbno = XFS_FSB_TO_AGBNO(mp, bno); 3880f65306eaSDarrick J. Wong if (args.agno >= mp->m_sb.sb_agcount || 3881f65306eaSDarrick J. Wong args.agbno >= mp->m_sb.sb_agblocks) 3882f65306eaSDarrick J. Wong return -EFSCORRUPTED; 3883f65306eaSDarrick J. Wong 3884f65306eaSDarrick J. Wong /* "Allocate" the extent from the range we passed in. */ 3885f65306eaSDarrick J. Wong trace_xfs_bmap_remap_alloc(ap->ip, *ap->firstblock, ap->length); 3886f65306eaSDarrick J. Wong ap->blkno = bno; 3887f65306eaSDarrick J. Wong ap->ip->i_d.di_nblocks += ap->length; 3888f65306eaSDarrick J. Wong xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); 3889f65306eaSDarrick J. Wong 3890f65306eaSDarrick J. Wong /* Fix the freelist, like a real allocator does. */ 3891f65306eaSDarrick J. Wong args.datatype = ap->datatype; 3892f65306eaSDarrick J. Wong args.pag = xfs_perag_get(args.mp, args.agno); 3893f65306eaSDarrick J. Wong ASSERT(args.pag); 3894f65306eaSDarrick J. Wong 3895f65306eaSDarrick J. Wong /* 3896f65306eaSDarrick J. Wong * The freelist fixing code will decline the allocation if 3897f65306eaSDarrick J. Wong * the size and shape of the free space doesn't allow for 3898f65306eaSDarrick J. Wong * allocating the extent and updating all the metadata that 3899f65306eaSDarrick J. Wong * happens during an allocation. We're remapping, not 3900f65306eaSDarrick J. Wong * allocating, so skip that check by pretending to be freeing. 3901f65306eaSDarrick J. Wong */ 3902f65306eaSDarrick J. Wong error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING); 3903f65306eaSDarrick J. Wong xfs_perag_put(args.pag); 3904f65306eaSDarrick J. Wong if (error) 3905f65306eaSDarrick J. Wong trace_xfs_bmap_remap_alloc_error(ap->ip, error, _RET_IP_); 3906f65306eaSDarrick J. Wong return error; 3907f65306eaSDarrick J. Wong } 3908f65306eaSDarrick J. Wong 3909f65306eaSDarrick J. Wong /* 391030f712c9SDave Chinner * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. 391130f712c9SDave Chinner * It figures out where to ask the underlying allocator to put the new extent. 391230f712c9SDave Chinner */ 391330f712c9SDave Chinner STATIC int 391430f712c9SDave Chinner xfs_bmap_alloc( 391530f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 391630f712c9SDave Chinner { 3917f65306eaSDarrick J. Wong if (ap->flags & XFS_BMAPI_REMAP) 3918f65306eaSDarrick J. Wong return xfs_bmap_remap_alloc(ap); 3919292378edSDave Chinner if (XFS_IS_REALTIME_INODE(ap->ip) && 3920292378edSDave Chinner xfs_alloc_is_userdata(ap->datatype)) 392130f712c9SDave Chinner return xfs_bmap_rtalloc(ap); 392230f712c9SDave Chinner return xfs_bmap_btalloc(ap); 392330f712c9SDave Chinner } 392430f712c9SDave Chinner 39250a0af28cSDarrick J. Wong /* Trim extent to fit a logical block range. */ 39260a0af28cSDarrick J. Wong void 39270a0af28cSDarrick J. Wong xfs_trim_extent( 39280a0af28cSDarrick J. Wong struct xfs_bmbt_irec *irec, 39290a0af28cSDarrick J. Wong xfs_fileoff_t bno, 39300a0af28cSDarrick J. Wong xfs_filblks_t len) 39310a0af28cSDarrick J. Wong { 39320a0af28cSDarrick J. Wong xfs_fileoff_t distance; 39330a0af28cSDarrick J. Wong xfs_fileoff_t end = bno + len; 39340a0af28cSDarrick J. Wong 39350a0af28cSDarrick J. Wong if (irec->br_startoff + irec->br_blockcount <= bno || 39360a0af28cSDarrick J. Wong irec->br_startoff >= end) { 39370a0af28cSDarrick J. Wong irec->br_blockcount = 0; 39380a0af28cSDarrick J. Wong return; 39390a0af28cSDarrick J. Wong } 39400a0af28cSDarrick J. Wong 39410a0af28cSDarrick J. Wong if (irec->br_startoff < bno) { 39420a0af28cSDarrick J. Wong distance = bno - irec->br_startoff; 39430a0af28cSDarrick J. Wong if (isnullstartblock(irec->br_startblock)) 39440a0af28cSDarrick J. Wong irec->br_startblock = DELAYSTARTBLOCK; 39450a0af28cSDarrick J. Wong if (irec->br_startblock != DELAYSTARTBLOCK && 39460a0af28cSDarrick J. Wong irec->br_startblock != HOLESTARTBLOCK) 39470a0af28cSDarrick J. Wong irec->br_startblock += distance; 39480a0af28cSDarrick J. Wong irec->br_startoff += distance; 39490a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 39500a0af28cSDarrick J. Wong } 39510a0af28cSDarrick J. Wong 39520a0af28cSDarrick J. Wong if (end < irec->br_startoff + irec->br_blockcount) { 39530a0af28cSDarrick J. Wong distance = irec->br_startoff + irec->br_blockcount - end; 39540a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 39550a0af28cSDarrick J. Wong } 39560a0af28cSDarrick J. Wong } 39570a0af28cSDarrick J. Wong 395830f712c9SDave Chinner /* 395930f712c9SDave Chinner * Trim the returned map to the required bounds 396030f712c9SDave Chinner */ 396130f712c9SDave Chinner STATIC void 396230f712c9SDave Chinner xfs_bmapi_trim_map( 396330f712c9SDave Chinner struct xfs_bmbt_irec *mval, 396430f712c9SDave Chinner struct xfs_bmbt_irec *got, 396530f712c9SDave Chinner xfs_fileoff_t *bno, 396630f712c9SDave Chinner xfs_filblks_t len, 396730f712c9SDave Chinner xfs_fileoff_t obno, 396830f712c9SDave Chinner xfs_fileoff_t end, 396930f712c9SDave Chinner int n, 397030f712c9SDave Chinner int flags) 397130f712c9SDave Chinner { 397230f712c9SDave Chinner if ((flags & XFS_BMAPI_ENTIRE) || 397330f712c9SDave Chinner got->br_startoff + got->br_blockcount <= obno) { 397430f712c9SDave Chinner *mval = *got; 397530f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 397630f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 397730f712c9SDave Chinner return; 397830f712c9SDave Chinner } 397930f712c9SDave Chinner 398030f712c9SDave Chinner if (obno > *bno) 398130f712c9SDave Chinner *bno = obno; 398230f712c9SDave Chinner ASSERT((*bno >= obno) || (n == 0)); 398330f712c9SDave Chinner ASSERT(*bno < end); 398430f712c9SDave Chinner mval->br_startoff = *bno; 398530f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 398630f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 398730f712c9SDave Chinner else 398830f712c9SDave Chinner mval->br_startblock = got->br_startblock + 398930f712c9SDave Chinner (*bno - got->br_startoff); 399030f712c9SDave Chinner /* 399130f712c9SDave Chinner * Return the minimum of what we got and what we asked for for 399230f712c9SDave Chinner * the length. We can use the len variable here because it is 399330f712c9SDave Chinner * modified below and we could have been there before coming 399430f712c9SDave Chinner * here if the first part of the allocation didn't overlap what 399530f712c9SDave Chinner * was asked for. 399630f712c9SDave Chinner */ 399730f712c9SDave Chinner mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, 399830f712c9SDave Chinner got->br_blockcount - (*bno - got->br_startoff)); 399930f712c9SDave Chinner mval->br_state = got->br_state; 400030f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 400130f712c9SDave Chinner return; 400230f712c9SDave Chinner } 400330f712c9SDave Chinner 400430f712c9SDave Chinner /* 400530f712c9SDave Chinner * Update and validate the extent map to return 400630f712c9SDave Chinner */ 400730f712c9SDave Chinner STATIC void 400830f712c9SDave Chinner xfs_bmapi_update_map( 400930f712c9SDave Chinner struct xfs_bmbt_irec **map, 401030f712c9SDave Chinner xfs_fileoff_t *bno, 401130f712c9SDave Chinner xfs_filblks_t *len, 401230f712c9SDave Chinner xfs_fileoff_t obno, 401330f712c9SDave Chinner xfs_fileoff_t end, 401430f712c9SDave Chinner int *n, 401530f712c9SDave Chinner int flags) 401630f712c9SDave Chinner { 401730f712c9SDave Chinner xfs_bmbt_irec_t *mval = *map; 401830f712c9SDave Chinner 401930f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || 402030f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= end)); 402130f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || 402230f712c9SDave Chinner (mval->br_startoff < obno)); 402330f712c9SDave Chinner 402430f712c9SDave Chinner *bno = mval->br_startoff + mval->br_blockcount; 402530f712c9SDave Chinner *len = end - *bno; 402630f712c9SDave Chinner if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { 402730f712c9SDave Chinner /* update previous map with new information */ 402830f712c9SDave Chinner ASSERT(mval->br_startblock == mval[-1].br_startblock); 402930f712c9SDave Chinner ASSERT(mval->br_blockcount > mval[-1].br_blockcount); 403030f712c9SDave Chinner ASSERT(mval->br_state == mval[-1].br_state); 403130f712c9SDave Chinner mval[-1].br_blockcount = mval->br_blockcount; 403230f712c9SDave Chinner mval[-1].br_state = mval->br_state; 403330f712c9SDave Chinner } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && 403430f712c9SDave Chinner mval[-1].br_startblock != DELAYSTARTBLOCK && 403530f712c9SDave Chinner mval[-1].br_startblock != HOLESTARTBLOCK && 403630f712c9SDave Chinner mval->br_startblock == mval[-1].br_startblock + 403730f712c9SDave Chinner mval[-1].br_blockcount && 403830f712c9SDave Chinner ((flags & XFS_BMAPI_IGSTATE) || 403930f712c9SDave Chinner mval[-1].br_state == mval->br_state)) { 404030f712c9SDave Chinner ASSERT(mval->br_startoff == 404130f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount); 404230f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 404330f712c9SDave Chinner } else if (*n > 0 && 404430f712c9SDave Chinner mval->br_startblock == DELAYSTARTBLOCK && 404530f712c9SDave Chinner mval[-1].br_startblock == DELAYSTARTBLOCK && 404630f712c9SDave Chinner mval->br_startoff == 404730f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount) { 404830f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 404930f712c9SDave Chinner mval[-1].br_state = mval->br_state; 405030f712c9SDave Chinner } else if (!((*n == 0) && 405130f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= 405230f712c9SDave Chinner obno))) { 405330f712c9SDave Chinner mval++; 405430f712c9SDave Chinner (*n)++; 405530f712c9SDave Chinner } 405630f712c9SDave Chinner *map = mval; 405730f712c9SDave Chinner } 405830f712c9SDave Chinner 405930f712c9SDave Chinner /* 406030f712c9SDave Chinner * Map file blocks to filesystem blocks without allocation. 406130f712c9SDave Chinner */ 406230f712c9SDave Chinner int 406330f712c9SDave Chinner xfs_bmapi_read( 406430f712c9SDave Chinner struct xfs_inode *ip, 406530f712c9SDave Chinner xfs_fileoff_t bno, 406630f712c9SDave Chinner xfs_filblks_t len, 406730f712c9SDave Chinner struct xfs_bmbt_irec *mval, 406830f712c9SDave Chinner int *nmap, 406930f712c9SDave Chinner int flags) 407030f712c9SDave Chinner { 407130f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 407230f712c9SDave Chinner struct xfs_ifork *ifp; 407330f712c9SDave Chinner struct xfs_bmbt_irec got; 407430f712c9SDave Chinner xfs_fileoff_t obno; 407530f712c9SDave Chinner xfs_fileoff_t end; 4076334f3423SChristoph Hellwig xfs_extnum_t idx; 407730f712c9SDave Chinner int error; 4078334f3423SChristoph Hellwig bool eof = false; 407930f712c9SDave Chinner int n = 0; 40803993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 408130f712c9SDave Chinner 408230f712c9SDave Chinner ASSERT(*nmap >= 1); 408330f712c9SDave Chinner ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| 40843993baebSDarrick J. Wong XFS_BMAPI_IGSTATE|XFS_BMAPI_COWFORK))); 408530f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); 408630f712c9SDave Chinner 408730f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 408830f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 408930f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 409030f712c9SDave Chinner mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { 409130f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); 40922451337dSDave Chinner return -EFSCORRUPTED; 409330f712c9SDave Chinner } 409430f712c9SDave Chinner 409530f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 40962451337dSDave Chinner return -EIO; 409730f712c9SDave Chinner 4098ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapr); 409930f712c9SDave Chinner 410030f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 410130f712c9SDave Chinner 41023993baebSDarrick J. Wong /* No CoW fork? Return a hole. */ 41033993baebSDarrick J. Wong if (whichfork == XFS_COW_FORK && !ifp) { 41043993baebSDarrick J. Wong mval->br_startoff = bno; 41053993baebSDarrick J. Wong mval->br_startblock = HOLESTARTBLOCK; 41063993baebSDarrick J. Wong mval->br_blockcount = len; 41073993baebSDarrick J. Wong mval->br_state = XFS_EXT_NORM; 41083993baebSDarrick J. Wong *nmap = 1; 41093993baebSDarrick J. Wong return 0; 41103993baebSDarrick J. Wong } 41113993baebSDarrick J. Wong 411230f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 411330f712c9SDave Chinner error = xfs_iread_extents(NULL, ip, whichfork); 411430f712c9SDave Chinner if (error) 411530f712c9SDave Chinner return error; 411630f712c9SDave Chinner } 411730f712c9SDave Chinner 4118334f3423SChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &idx, &got)) 4119334f3423SChristoph Hellwig eof = true; 412030f712c9SDave Chinner end = bno + len; 412130f712c9SDave Chinner obno = bno; 412230f712c9SDave Chinner 412330f712c9SDave Chinner while (bno < end && n < *nmap) { 412430f712c9SDave Chinner /* Reading past eof, act as though there's a hole up to end. */ 412530f712c9SDave Chinner if (eof) 412630f712c9SDave Chinner got.br_startoff = end; 412730f712c9SDave Chinner if (got.br_startoff > bno) { 412830f712c9SDave Chinner /* Reading in a hole. */ 412930f712c9SDave Chinner mval->br_startoff = bno; 413030f712c9SDave Chinner mval->br_startblock = HOLESTARTBLOCK; 413130f712c9SDave Chinner mval->br_blockcount = 413230f712c9SDave Chinner XFS_FILBLKS_MIN(len, got.br_startoff - bno); 413330f712c9SDave Chinner mval->br_state = XFS_EXT_NORM; 413430f712c9SDave Chinner bno += mval->br_blockcount; 413530f712c9SDave Chinner len -= mval->br_blockcount; 413630f712c9SDave Chinner mval++; 413730f712c9SDave Chinner n++; 413830f712c9SDave Chinner continue; 413930f712c9SDave Chinner } 414030f712c9SDave Chinner 414130f712c9SDave Chinner /* set up the extent map to return. */ 414230f712c9SDave Chinner xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); 414330f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 414430f712c9SDave Chinner 414530f712c9SDave Chinner /* If we're done, stop now. */ 414630f712c9SDave Chinner if (bno >= end || n >= *nmap) 414730f712c9SDave Chinner break; 414830f712c9SDave Chinner 414930f712c9SDave Chinner /* Else go on to the next record. */ 4150334f3423SChristoph Hellwig if (!xfs_iext_get_extent(ifp, ++idx, &got)) 4151334f3423SChristoph Hellwig eof = true; 415230f712c9SDave Chinner } 415330f712c9SDave Chinner *nmap = n; 415430f712c9SDave Chinner return 0; 415530f712c9SDave Chinner } 415630f712c9SDave Chinner 4157f65e6fadSBrian Foster /* 4158f65e6fadSBrian Foster * Add a delayed allocation extent to an inode. Blocks are reserved from the 4159f65e6fadSBrian Foster * global pool and the extent inserted into the inode in-core extent tree. 4160f65e6fadSBrian Foster * 4161f65e6fadSBrian Foster * On entry, got refers to the first extent beyond the offset of the extent to 4162f65e6fadSBrian Foster * allocate or eof is specified if no such extent exists. On return, got refers 4163f65e6fadSBrian Foster * to the extent record that was inserted to the inode fork. 4164f65e6fadSBrian Foster * 4165f65e6fadSBrian Foster * Note that the allocated extent may have been merged with contiguous extents 4166f65e6fadSBrian Foster * during insertion into the inode fork. Thus, got does not reflect the current 4167f65e6fadSBrian Foster * state of the inode fork on return. If necessary, the caller can use lastx to 4168f65e6fadSBrian Foster * look up the updated record in the inode fork. 4169f65e6fadSBrian Foster */ 417051446f5bSChristoph Hellwig int 417130f712c9SDave Chinner xfs_bmapi_reserve_delalloc( 417230f712c9SDave Chinner struct xfs_inode *ip, 4173be51f811SDarrick J. Wong int whichfork, 4174974ae922SBrian Foster xfs_fileoff_t off, 417530f712c9SDave Chinner xfs_filblks_t len, 4176974ae922SBrian Foster xfs_filblks_t prealloc, 417730f712c9SDave Chinner struct xfs_bmbt_irec *got, 417830f712c9SDave Chinner xfs_extnum_t *lastx, 417930f712c9SDave Chinner int eof) 418030f712c9SDave Chinner { 418130f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 4182be51f811SDarrick J. Wong struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 418330f712c9SDave Chinner xfs_extlen_t alen; 418430f712c9SDave Chinner xfs_extlen_t indlen; 418530f712c9SDave Chinner char rt = XFS_IS_REALTIME_INODE(ip); 418630f712c9SDave Chinner xfs_extlen_t extsz; 418730f712c9SDave Chinner int error; 4188974ae922SBrian Foster xfs_fileoff_t aoff = off; 418930f712c9SDave Chinner 4190974ae922SBrian Foster /* 4191974ae922SBrian Foster * Cap the alloc length. Keep track of prealloc so we know whether to 4192974ae922SBrian Foster * tag the inode before we return. 4193974ae922SBrian Foster */ 4194974ae922SBrian Foster alen = XFS_FILBLKS_MIN(len + prealloc, MAXEXTLEN); 419530f712c9SDave Chinner if (!eof) 419630f712c9SDave Chinner alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); 4197974ae922SBrian Foster if (prealloc && alen >= len) 4198974ae922SBrian Foster prealloc = alen - len; 419930f712c9SDave Chinner 420030f712c9SDave Chinner /* Figure out the extent size, adjust alen */ 4201f7ca3522SDarrick J. Wong if (whichfork == XFS_COW_FORK) 4202f7ca3522SDarrick J. Wong extsz = xfs_get_cowextsz_hint(ip); 4203f7ca3522SDarrick J. Wong else 420430f712c9SDave Chinner extsz = xfs_get_extsz_hint(ip); 420530f712c9SDave Chinner if (extsz) { 420665c5f419SChristoph Hellwig struct xfs_bmbt_irec prev; 420765c5f419SChristoph Hellwig 420865c5f419SChristoph Hellwig if (!xfs_iext_get_extent(ifp, *lastx - 1, &prev)) 420965c5f419SChristoph Hellwig prev.br_startoff = NULLFILEOFF; 421065c5f419SChristoph Hellwig 421165c5f419SChristoph Hellwig error = xfs_bmap_extsize_align(mp, got, &prev, extsz, rt, eof, 421230f712c9SDave Chinner 1, 0, &aoff, &alen); 421330f712c9SDave Chinner ASSERT(!error); 421430f712c9SDave Chinner } 421530f712c9SDave Chinner 421630f712c9SDave Chinner if (rt) 421730f712c9SDave Chinner extsz = alen / mp->m_sb.sb_rextsize; 421830f712c9SDave Chinner 421930f712c9SDave Chinner /* 422030f712c9SDave Chinner * Make a transaction-less quota reservation for delayed allocation 422130f712c9SDave Chinner * blocks. This number gets adjusted later. We return if we haven't 422230f712c9SDave Chinner * allocated blocks already inside this loop. 422330f712c9SDave Chinner */ 422430f712c9SDave Chinner error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, 422530f712c9SDave Chinner rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 422630f712c9SDave Chinner if (error) 422730f712c9SDave Chinner return error; 422830f712c9SDave Chinner 422930f712c9SDave Chinner /* 423030f712c9SDave Chinner * Split changing sb for alen and indlen since they could be coming 423130f712c9SDave Chinner * from different places. 423230f712c9SDave Chinner */ 423330f712c9SDave Chinner indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); 423430f712c9SDave Chinner ASSERT(indlen > 0); 423530f712c9SDave Chinner 423630f712c9SDave Chinner if (rt) { 4237bab98bbeSDave Chinner error = xfs_mod_frextents(mp, -((int64_t)extsz)); 423830f712c9SDave Chinner } else { 42390d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); 424030f712c9SDave Chinner } 424130f712c9SDave Chinner 424230f712c9SDave Chinner if (error) 424330f712c9SDave Chinner goto out_unreserve_quota; 424430f712c9SDave Chinner 42450d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); 424630f712c9SDave Chinner if (error) 424730f712c9SDave Chinner goto out_unreserve_blocks; 424830f712c9SDave Chinner 424930f712c9SDave Chinner 425030f712c9SDave Chinner ip->i_delayed_blks += alen; 425130f712c9SDave Chinner 425230f712c9SDave Chinner got->br_startoff = aoff; 425330f712c9SDave Chinner got->br_startblock = nullstartblock(indlen); 425430f712c9SDave Chinner got->br_blockcount = alen; 425530f712c9SDave Chinner got->br_state = XFS_EXT_NORM; 425630f712c9SDave Chinner 4257f65e6fadSBrian Foster xfs_bmap_add_extent_hole_delay(ip, whichfork, lastx, got); 425830f712c9SDave Chinner 4259974ae922SBrian Foster /* 4260974ae922SBrian Foster * Tag the inode if blocks were preallocated. Note that COW fork 4261974ae922SBrian Foster * preallocation can occur at the start or end of the extent, even when 4262974ae922SBrian Foster * prealloc == 0, so we must also check the aligned offset and length. 4263974ae922SBrian Foster */ 4264974ae922SBrian Foster if (whichfork == XFS_DATA_FORK && prealloc) 4265974ae922SBrian Foster xfs_inode_set_eofblocks_tag(ip); 4266974ae922SBrian Foster if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len)) 4267974ae922SBrian Foster xfs_inode_set_cowblocks_tag(ip); 4268974ae922SBrian Foster 426930f712c9SDave Chinner return 0; 427030f712c9SDave Chinner 427130f712c9SDave Chinner out_unreserve_blocks: 427230f712c9SDave Chinner if (rt) 4273bab98bbeSDave Chinner xfs_mod_frextents(mp, extsz); 427430f712c9SDave Chinner else 42750d485adaSDave Chinner xfs_mod_fdblocks(mp, alen, false); 427630f712c9SDave Chinner out_unreserve_quota: 427730f712c9SDave Chinner if (XFS_IS_QUOTA_ON(mp)) 427830f712c9SDave Chinner xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? 427930f712c9SDave Chinner XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 428030f712c9SDave Chinner return error; 428130f712c9SDave Chinner } 428230f712c9SDave Chinner 42837f8a058fSDave Chinner static int 42847f8a058fSDave Chinner xfs_bmapi_allocate( 428530f712c9SDave Chinner struct xfs_bmalloca *bma) 428630f712c9SDave Chinner { 428730f712c9SDave Chinner struct xfs_mount *mp = bma->ip->i_mount; 428860b4984fSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(bma->flags); 428930f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 429030f712c9SDave Chinner int tmp_logflags = 0; 429130f712c9SDave Chinner int error; 429230f712c9SDave Chinner 429330f712c9SDave Chinner ASSERT(bma->length > 0); 429430f712c9SDave Chinner 429530f712c9SDave Chinner /* 429630f712c9SDave Chinner * For the wasdelay case, we could also just allocate the stuff asked 429730f712c9SDave Chinner * for in this bmap call but that wouldn't be as good. 429830f712c9SDave Chinner */ 429930f712c9SDave Chinner if (bma->wasdel) { 430030f712c9SDave Chinner bma->length = (xfs_extlen_t)bma->got.br_blockcount; 430130f712c9SDave Chinner bma->offset = bma->got.br_startoff; 43020e8d630bSChristoph Hellwig if (bma->idx) { 430330f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), 430430f712c9SDave Chinner &bma->prev); 430530f712c9SDave Chinner } 430630f712c9SDave Chinner } else { 430730f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); 430830f712c9SDave Chinner if (!bma->eof) 430930f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, 431030f712c9SDave Chinner bma->got.br_startoff - bma->offset); 431130f712c9SDave Chinner } 431230f712c9SDave Chinner 431330f712c9SDave Chinner /* 4314292378edSDave Chinner * Set the data type being allocated. For the data fork, the first data 4315292378edSDave Chinner * in the file is treated differently to all other allocations. For the 4316292378edSDave Chinner * attribute fork, we only need to ensure the allocated range is not on 4317292378edSDave Chinner * the busy list. 431830f712c9SDave Chinner */ 431930f712c9SDave Chinner if (!(bma->flags & XFS_BMAPI_METADATA)) { 4320292378edSDave Chinner bma->datatype = XFS_ALLOC_NOBUSY; 4321292378edSDave Chinner if (whichfork == XFS_DATA_FORK) { 4322292378edSDave Chinner if (bma->offset == 0) 4323292378edSDave Chinner bma->datatype |= XFS_ALLOC_INITIAL_USER_DATA; 4324292378edSDave Chinner else 4325292378edSDave Chinner bma->datatype |= XFS_ALLOC_USERDATA; 4326292378edSDave Chinner } 43273fbbbea3SDave Chinner if (bma->flags & XFS_BMAPI_ZERO) 4328292378edSDave Chinner bma->datatype |= XFS_ALLOC_USERDATA_ZERO; 432930f712c9SDave Chinner } 433030f712c9SDave Chinner 433130f712c9SDave Chinner bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; 433230f712c9SDave Chinner 433330f712c9SDave Chinner /* 433430f712c9SDave Chinner * Only want to do the alignment at the eof if it is userdata and 433530f712c9SDave Chinner * allocation length is larger than a stripe unit. 433630f712c9SDave Chinner */ 433730f712c9SDave Chinner if (mp->m_dalign && bma->length >= mp->m_dalign && 433830f712c9SDave Chinner !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { 433930f712c9SDave Chinner error = xfs_bmap_isaeof(bma, whichfork); 434030f712c9SDave Chinner if (error) 434130f712c9SDave Chinner return error; 434230f712c9SDave Chinner } 434330f712c9SDave Chinner 434430f712c9SDave Chinner error = xfs_bmap_alloc(bma); 434530f712c9SDave Chinner if (error) 434630f712c9SDave Chinner return error; 434730f712c9SDave Chinner 434830f712c9SDave Chinner if (bma->cur) 434930f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 435030f712c9SDave Chinner if (bma->blkno == NULLFSBLOCK) 435130f712c9SDave Chinner return 0; 435230f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 435330f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); 435430f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 43552c3234d1SDarrick J. Wong bma->cur->bc_private.b.dfops = bma->dfops; 435630f712c9SDave Chinner } 435730f712c9SDave Chinner /* 435830f712c9SDave Chinner * Bump the number of extents we've allocated 435930f712c9SDave Chinner * in this call. 436030f712c9SDave Chinner */ 436130f712c9SDave Chinner bma->nallocs++; 436230f712c9SDave Chinner 436330f712c9SDave Chinner if (bma->cur) 436430f712c9SDave Chinner bma->cur->bc_private.b.flags = 436530f712c9SDave Chinner bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; 436630f712c9SDave Chinner 436730f712c9SDave Chinner bma->got.br_startoff = bma->offset; 436830f712c9SDave Chinner bma->got.br_startblock = bma->blkno; 436930f712c9SDave Chinner bma->got.br_blockcount = bma->length; 437030f712c9SDave Chinner bma->got.br_state = XFS_EXT_NORM; 437130f712c9SDave Chinner 437230f712c9SDave Chinner /* 437305a630d7SDarrick J. Wong * In the data fork, a wasdelay extent has been initialized, so 437405a630d7SDarrick J. Wong * shouldn't be flagged as unwritten. 437505a630d7SDarrick J. Wong * 437605a630d7SDarrick J. Wong * For the cow fork, however, we convert delalloc reservations 437705a630d7SDarrick J. Wong * (extents allocated for speculative preallocation) to 437805a630d7SDarrick J. Wong * allocated unwritten extents, and only convert the unwritten 437905a630d7SDarrick J. Wong * extents to real extents when we're about to write the data. 438030f712c9SDave Chinner */ 438105a630d7SDarrick J. Wong if ((!bma->wasdel || (bma->flags & XFS_BMAPI_COWFORK)) && 438205a630d7SDarrick J. Wong (bma->flags & XFS_BMAPI_PREALLOC) && 438330f712c9SDave Chinner xfs_sb_version_hasextflgbit(&mp->m_sb)) 438430f712c9SDave Chinner bma->got.br_state = XFS_EXT_UNWRITTEN; 438530f712c9SDave Chinner 438630f712c9SDave Chinner if (bma->wasdel) 438760b4984fSDarrick J. Wong error = xfs_bmap_add_extent_delay_real(bma, whichfork); 438830f712c9SDave Chinner else 438930f712c9SDave Chinner error = xfs_bmap_add_extent_hole_real(bma, whichfork); 439030f712c9SDave Chinner 439130f712c9SDave Chinner bma->logflags |= tmp_logflags; 439230f712c9SDave Chinner if (error) 439330f712c9SDave Chinner return error; 439430f712c9SDave Chinner 439530f712c9SDave Chinner /* 439630f712c9SDave Chinner * Update our extent pointer, given that xfs_bmap_add_extent_delay_real 439730f712c9SDave Chinner * or xfs_bmap_add_extent_hole_real might have merged it into one of 439830f712c9SDave Chinner * the neighbouring ones. 439930f712c9SDave Chinner */ 440030f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); 440130f712c9SDave Chinner 440230f712c9SDave Chinner ASSERT(bma->got.br_startoff <= bma->offset); 440330f712c9SDave Chinner ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= 440430f712c9SDave Chinner bma->offset + bma->length); 440530f712c9SDave Chinner ASSERT(bma->got.br_state == XFS_EXT_NORM || 440630f712c9SDave Chinner bma->got.br_state == XFS_EXT_UNWRITTEN); 440730f712c9SDave Chinner return 0; 440830f712c9SDave Chinner } 440930f712c9SDave Chinner 441030f712c9SDave Chinner STATIC int 441130f712c9SDave Chinner xfs_bmapi_convert_unwritten( 441230f712c9SDave Chinner struct xfs_bmalloca *bma, 441330f712c9SDave Chinner struct xfs_bmbt_irec *mval, 441430f712c9SDave Chinner xfs_filblks_t len, 441530f712c9SDave Chinner int flags) 441630f712c9SDave Chinner { 44173993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 441830f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 441930f712c9SDave Chinner int tmp_logflags = 0; 442030f712c9SDave Chinner int error; 442130f712c9SDave Chinner 442230f712c9SDave Chinner /* check if we need to do unwritten->real conversion */ 442330f712c9SDave Chinner if (mval->br_state == XFS_EXT_UNWRITTEN && 442430f712c9SDave Chinner (flags & XFS_BMAPI_PREALLOC)) 442530f712c9SDave Chinner return 0; 442630f712c9SDave Chinner 442730f712c9SDave Chinner /* check if we need to do real->unwritten conversion */ 442830f712c9SDave Chinner if (mval->br_state == XFS_EXT_NORM && 442930f712c9SDave Chinner (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != 443030f712c9SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) 443130f712c9SDave Chinner return 0; 443230f712c9SDave Chinner 443330f712c9SDave Chinner /* 443430f712c9SDave Chinner * Modify (by adding) the state flag, if writing. 443530f712c9SDave Chinner */ 443630f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 443730f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 443830f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, 443930f712c9SDave Chinner bma->ip, whichfork); 444030f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 44412c3234d1SDarrick J. Wong bma->cur->bc_private.b.dfops = bma->dfops; 444230f712c9SDave Chinner } 444330f712c9SDave Chinner mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) 444430f712c9SDave Chinner ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; 444530f712c9SDave Chinner 44463fbbbea3SDave Chinner /* 44473fbbbea3SDave Chinner * Before insertion into the bmbt, zero the range being converted 44483fbbbea3SDave Chinner * if required. 44493fbbbea3SDave Chinner */ 44503fbbbea3SDave Chinner if (flags & XFS_BMAPI_ZERO) { 44513fbbbea3SDave Chinner error = xfs_zero_extent(bma->ip, mval->br_startblock, 44523fbbbea3SDave Chinner mval->br_blockcount); 44533fbbbea3SDave Chinner if (error) 44543fbbbea3SDave Chinner return error; 44553fbbbea3SDave Chinner } 44563fbbbea3SDave Chinner 445705a630d7SDarrick J. Wong error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, whichfork, 445805a630d7SDarrick J. Wong &bma->idx, &bma->cur, mval, bma->firstblock, bma->dfops, 445930f712c9SDave Chinner &tmp_logflags); 44602e588a46SBrian Foster /* 44612e588a46SBrian Foster * Log the inode core unconditionally in the unwritten extent conversion 44622e588a46SBrian Foster * path because the conversion might not have done so (e.g., if the 44632e588a46SBrian Foster * extent count hasn't changed). We need to make sure the inode is dirty 44642e588a46SBrian Foster * in the transaction for the sake of fsync(), even if nothing has 44652e588a46SBrian Foster * changed, because fsync() will not force the log for this transaction 44662e588a46SBrian Foster * unless it sees the inode pinned. 446705a630d7SDarrick J. Wong * 446805a630d7SDarrick J. Wong * Note: If we're only converting cow fork extents, there aren't 446905a630d7SDarrick J. Wong * any on-disk updates to make, so we don't need to log anything. 44702e588a46SBrian Foster */ 447105a630d7SDarrick J. Wong if (whichfork != XFS_COW_FORK) 44722e588a46SBrian Foster bma->logflags |= tmp_logflags | XFS_ILOG_CORE; 447330f712c9SDave Chinner if (error) 447430f712c9SDave Chinner return error; 447530f712c9SDave Chinner 447630f712c9SDave Chinner /* 447730f712c9SDave Chinner * Update our extent pointer, given that 447830f712c9SDave Chinner * xfs_bmap_add_extent_unwritten_real might have merged it into one 447930f712c9SDave Chinner * of the neighbouring ones. 448030f712c9SDave Chinner */ 448130f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); 448230f712c9SDave Chinner 448330f712c9SDave Chinner /* 448430f712c9SDave Chinner * We may have combined previously unwritten space with written space, 448530f712c9SDave Chinner * so generate another request. 448630f712c9SDave Chinner */ 448730f712c9SDave Chinner if (mval->br_blockcount < len) 44882451337dSDave Chinner return -EAGAIN; 448930f712c9SDave Chinner return 0; 449030f712c9SDave Chinner } 449130f712c9SDave Chinner 449230f712c9SDave Chinner /* 449330f712c9SDave Chinner * Map file blocks to filesystem blocks, and allocate blocks or convert the 449430f712c9SDave Chinner * extent state if necessary. Details behaviour is controlled by the flags 449530f712c9SDave Chinner * parameter. Only allocates blocks from a single allocation group, to avoid 449630f712c9SDave Chinner * locking problems. 449730f712c9SDave Chinner * 449830f712c9SDave Chinner * The returned value in "firstblock" from the first call in a transaction 449930f712c9SDave Chinner * must be remembered and presented to subsequent calls in "firstblock". 450030f712c9SDave Chinner * An upper bound for the number of blocks to be allocated is supplied to 450130f712c9SDave Chinner * the first call in "total"; if no allocation group has that many free 450230f712c9SDave Chinner * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). 450330f712c9SDave Chinner */ 450430f712c9SDave Chinner int 450530f712c9SDave Chinner xfs_bmapi_write( 450630f712c9SDave Chinner struct xfs_trans *tp, /* transaction pointer */ 450730f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 450830f712c9SDave Chinner xfs_fileoff_t bno, /* starting file offs. mapped */ 450930f712c9SDave Chinner xfs_filblks_t len, /* length to map in file */ 451030f712c9SDave Chinner int flags, /* XFS_BMAPI_... */ 451130f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first allocated block 451230f712c9SDave Chinner controls a.g. for allocs */ 451330f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed */ 451430f712c9SDave Chinner struct xfs_bmbt_irec *mval, /* output: map values */ 451530f712c9SDave Chinner int *nmap, /* i/o: mval size/count */ 45162c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops) /* i/o: list extents to free */ 451730f712c9SDave Chinner { 451830f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 451930f712c9SDave Chinner struct xfs_ifork *ifp; 452030f712c9SDave Chinner struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ 452130f712c9SDave Chinner xfs_fileoff_t end; /* end of mapped file region */ 45222d58f6efSChristoph Hellwig bool eof = false; /* after the end of extents */ 452330f712c9SDave Chinner int error; /* error return */ 452430f712c9SDave Chinner int n; /* current extent index */ 452530f712c9SDave Chinner xfs_fileoff_t obno; /* old block number (offset) */ 452630f712c9SDave Chinner int whichfork; /* data or attr fork */ 452730f712c9SDave Chinner 452830f712c9SDave Chinner #ifdef DEBUG 452930f712c9SDave Chinner xfs_fileoff_t orig_bno; /* original block number value */ 453030f712c9SDave Chinner int orig_flags; /* original flags arg value */ 453130f712c9SDave Chinner xfs_filblks_t orig_len; /* original value of len arg */ 453230f712c9SDave Chinner struct xfs_bmbt_irec *orig_mval; /* original value of mval */ 453330f712c9SDave Chinner int orig_nmap; /* original value of *nmap */ 453430f712c9SDave Chinner 453530f712c9SDave Chinner orig_bno = bno; 453630f712c9SDave Chinner orig_len = len; 453730f712c9SDave Chinner orig_flags = flags; 453830f712c9SDave Chinner orig_mval = mval; 453930f712c9SDave Chinner orig_nmap = *nmap; 454030f712c9SDave Chinner #endif 454160b4984fSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 454230f712c9SDave Chinner 454330f712c9SDave Chinner ASSERT(*nmap >= 1); 454430f712c9SDave Chinner ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); 454530f712c9SDave Chinner ASSERT(!(flags & XFS_BMAPI_IGSTATE)); 454605a630d7SDarrick J. Wong ASSERT(tp != NULL || 454705a630d7SDarrick J. Wong (flags & (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)) == 454805a630d7SDarrick J. Wong (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)); 454930f712c9SDave Chinner ASSERT(len > 0); 455030f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); 455130f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 4552f65306eaSDarrick J. Wong ASSERT(!(flags & XFS_BMAPI_REMAP) || whichfork == XFS_DATA_FORK); 4553f65306eaSDarrick J. Wong ASSERT(!(flags & XFS_BMAPI_PREALLOC) || !(flags & XFS_BMAPI_REMAP)); 4554f65306eaSDarrick J. Wong ASSERT(!(flags & XFS_BMAPI_CONVERT) || !(flags & XFS_BMAPI_REMAP)); 455530f712c9SDave Chinner 45563fbbbea3SDave Chinner /* zeroing is for currently only for data extents, not metadata */ 45573fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != 45583fbbbea3SDave Chinner (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)); 45593fbbbea3SDave Chinner /* 45603fbbbea3SDave Chinner * we can allocate unwritten extents or pre-zero allocated blocks, 45613fbbbea3SDave Chinner * but it makes no sense to do both at once. This would result in 45623fbbbea3SDave Chinner * zeroing the unwritten extent twice, but it still being an 45633fbbbea3SDave Chinner * unwritten extent.... 45643fbbbea3SDave Chinner */ 45653fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)) != 45663fbbbea3SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)); 45673fbbbea3SDave Chinner 456830f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 456930f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 457030f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 457130f712c9SDave Chinner mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { 457230f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); 45732451337dSDave Chinner return -EFSCORRUPTED; 457430f712c9SDave Chinner } 457530f712c9SDave Chinner 457630f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 45772451337dSDave Chinner return -EIO; 457830f712c9SDave Chinner 457930f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 458030f712c9SDave Chinner 4581ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapw); 458230f712c9SDave Chinner 458330f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 458430f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) 458530f712c9SDave Chinner bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; 458630f712c9SDave Chinner else 458730f712c9SDave Chinner bma.minleft = 1; 458830f712c9SDave Chinner } else { 458930f712c9SDave Chinner bma.minleft = 0; 459030f712c9SDave Chinner } 459130f712c9SDave Chinner 459230f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 459330f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 459430f712c9SDave Chinner if (error) 459530f712c9SDave Chinner goto error0; 459630f712c9SDave Chinner } 459730f712c9SDave Chinner 459830f712c9SDave Chinner n = 0; 459930f712c9SDave Chinner end = bno + len; 460030f712c9SDave Chinner obno = bno; 460130f712c9SDave Chinner 46022d58f6efSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &bma.idx, &bma.got)) 46032d58f6efSChristoph Hellwig eof = true; 46042d58f6efSChristoph Hellwig if (!xfs_iext_get_extent(ifp, bma.idx - 1, &bma.prev)) 46052d58f6efSChristoph Hellwig bma.prev.br_startoff = NULLFILEOFF; 460630f712c9SDave Chinner bma.tp = tp; 460730f712c9SDave Chinner bma.ip = ip; 460830f712c9SDave Chinner bma.total = total; 4609292378edSDave Chinner bma.datatype = 0; 46102c3234d1SDarrick J. Wong bma.dfops = dfops; 461130f712c9SDave Chinner bma.firstblock = firstblock; 461230f712c9SDave Chinner 461330f712c9SDave Chinner while (bno < end && n < *nmap) { 4614d2b3964aSChristoph Hellwig bool need_alloc = false, wasdelay = false; 461530f712c9SDave Chinner 4616d2b3964aSChristoph Hellwig /* in hole or beyoned EOF? */ 4617d2b3964aSChristoph Hellwig if (eof || bma.got.br_startoff > bno) { 4618d2b3964aSChristoph Hellwig if (flags & XFS_BMAPI_DELALLOC) { 4619d2b3964aSChristoph Hellwig /* 4620d2b3964aSChristoph Hellwig * For the COW fork we can reasonably get a 4621d2b3964aSChristoph Hellwig * request for converting an extent that races 4622d2b3964aSChristoph Hellwig * with other threads already having converted 4623d2b3964aSChristoph Hellwig * part of it, as there converting COW to 4624d2b3964aSChristoph Hellwig * regular blocks is not protected using the 4625d2b3964aSChristoph Hellwig * IOLOCK. 4626d2b3964aSChristoph Hellwig */ 4627d2b3964aSChristoph Hellwig ASSERT(flags & XFS_BMAPI_COWFORK); 4628d2b3964aSChristoph Hellwig if (!(flags & XFS_BMAPI_COWFORK)) { 4629d2b3964aSChristoph Hellwig error = -EIO; 4630d2b3964aSChristoph Hellwig goto error0; 4631d2b3964aSChristoph Hellwig } 4632d2b3964aSChristoph Hellwig 4633d2b3964aSChristoph Hellwig if (eof || bno >= end) 4634d2b3964aSChristoph Hellwig break; 4635d2b3964aSChristoph Hellwig } else { 4636d2b3964aSChristoph Hellwig need_alloc = true; 4637d2b3964aSChristoph Hellwig } 4638d2b3964aSChristoph Hellwig } else { 463930f712c9SDave Chinner /* 4640f65306eaSDarrick J. Wong * Make sure we only reflink into a hole. 4641f65306eaSDarrick J. Wong */ 4642d2b3964aSChristoph Hellwig ASSERT(!(flags & XFS_BMAPI_REMAP)); 4643d2b3964aSChristoph Hellwig if (isnullstartblock(bma.got.br_startblock)) 4644d2b3964aSChristoph Hellwig wasdelay = true; 4645d2b3964aSChristoph Hellwig } 4646f65306eaSDarrick J. Wong 4647f65306eaSDarrick J. Wong /* 464830f712c9SDave Chinner * First, deal with the hole before the allocated space 464930f712c9SDave Chinner * that we found, if any. 465030f712c9SDave Chinner */ 4651d2b3964aSChristoph Hellwig if (need_alloc || wasdelay) { 465230f712c9SDave Chinner bma.eof = eof; 465330f712c9SDave Chinner bma.conv = !!(flags & XFS_BMAPI_CONVERT); 465430f712c9SDave Chinner bma.wasdel = wasdelay; 465530f712c9SDave Chinner bma.offset = bno; 465630f712c9SDave Chinner bma.flags = flags; 465730f712c9SDave Chinner 465830f712c9SDave Chinner /* 465930f712c9SDave Chinner * There's a 32/64 bit type mismatch between the 466030f712c9SDave Chinner * allocation length request (which can be 64 bits in 466130f712c9SDave Chinner * length) and the bma length request, which is 466230f712c9SDave Chinner * xfs_extlen_t and therefore 32 bits. Hence we have to 466330f712c9SDave Chinner * check for 32-bit overflows and handle them here. 466430f712c9SDave Chinner */ 466530f712c9SDave Chinner if (len > (xfs_filblks_t)MAXEXTLEN) 466630f712c9SDave Chinner bma.length = MAXEXTLEN; 466730f712c9SDave Chinner else 466830f712c9SDave Chinner bma.length = len; 466930f712c9SDave Chinner 467030f712c9SDave Chinner ASSERT(len > 0); 467130f712c9SDave Chinner ASSERT(bma.length > 0); 467230f712c9SDave Chinner error = xfs_bmapi_allocate(&bma); 467330f712c9SDave Chinner if (error) 467430f712c9SDave Chinner goto error0; 467530f712c9SDave Chinner if (bma.blkno == NULLFSBLOCK) 467630f712c9SDave Chinner break; 4677174edb0eSDarrick J. Wong 4678174edb0eSDarrick J. Wong /* 4679174edb0eSDarrick J. Wong * If this is a CoW allocation, record the data in 4680174edb0eSDarrick J. Wong * the refcount btree for orphan recovery. 4681174edb0eSDarrick J. Wong */ 4682174edb0eSDarrick J. Wong if (whichfork == XFS_COW_FORK) { 4683174edb0eSDarrick J. Wong error = xfs_refcount_alloc_cow_extent(mp, dfops, 4684174edb0eSDarrick J. Wong bma.blkno, bma.length); 4685174edb0eSDarrick J. Wong if (error) 4686174edb0eSDarrick J. Wong goto error0; 4687174edb0eSDarrick J. Wong } 468830f712c9SDave Chinner } 468930f712c9SDave Chinner 469030f712c9SDave Chinner /* Deal with the allocated space we found. */ 469130f712c9SDave Chinner xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, 469230f712c9SDave Chinner end, n, flags); 469330f712c9SDave Chinner 469430f712c9SDave Chinner /* Execute unwritten extent conversion if necessary */ 469530f712c9SDave Chinner error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); 46962451337dSDave Chinner if (error == -EAGAIN) 469730f712c9SDave Chinner continue; 469830f712c9SDave Chinner if (error) 469930f712c9SDave Chinner goto error0; 470030f712c9SDave Chinner 470130f712c9SDave Chinner /* update the extent map to return */ 470230f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 470330f712c9SDave Chinner 470430f712c9SDave Chinner /* 470530f712c9SDave Chinner * If we're done, stop now. Stop when we've allocated 470630f712c9SDave Chinner * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise 470730f712c9SDave Chinner * the transaction may get too big. 470830f712c9SDave Chinner */ 470930f712c9SDave Chinner if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) 471030f712c9SDave Chinner break; 471130f712c9SDave Chinner 471230f712c9SDave Chinner /* Else go on to the next record. */ 471330f712c9SDave Chinner bma.prev = bma.got; 47142d58f6efSChristoph Hellwig if (!xfs_iext_get_extent(ifp, ++bma.idx, &bma.got)) 47152d58f6efSChristoph Hellwig eof = true; 471630f712c9SDave Chinner } 471730f712c9SDave Chinner *nmap = n; 471830f712c9SDave Chinner 471930f712c9SDave Chinner /* 472030f712c9SDave Chinner * Transform from btree to extents, give it cur. 472130f712c9SDave Chinner */ 472230f712c9SDave Chinner if (xfs_bmap_wants_extents(ip, whichfork)) { 472330f712c9SDave Chinner int tmp_logflags = 0; 472430f712c9SDave Chinner 472530f712c9SDave Chinner ASSERT(bma.cur); 472630f712c9SDave Chinner error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, 472730f712c9SDave Chinner &tmp_logflags, whichfork); 472830f712c9SDave Chinner bma.logflags |= tmp_logflags; 472930f712c9SDave Chinner if (error) 473030f712c9SDave Chinner goto error0; 473130f712c9SDave Chinner } 473230f712c9SDave Chinner 473330f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || 473430f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) > 473530f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork)); 473630f712c9SDave Chinner error = 0; 473730f712c9SDave Chinner error0: 473830f712c9SDave Chinner /* 473930f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 474030f712c9SDave Chinner * logging the extent records if we've converted to btree format. 474130f712c9SDave Chinner */ 474230f712c9SDave Chinner if ((bma.logflags & xfs_ilog_fext(whichfork)) && 474330f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 474430f712c9SDave Chinner bma.logflags &= ~xfs_ilog_fext(whichfork); 474530f712c9SDave Chinner else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && 474630f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) 474730f712c9SDave Chinner bma.logflags &= ~xfs_ilog_fbroot(whichfork); 474830f712c9SDave Chinner /* 474930f712c9SDave Chinner * Log whatever the flags say, even if error. Otherwise we might miss 475030f712c9SDave Chinner * detecting a case where the data is changed, there's an error, 475130f712c9SDave Chinner * and it's not logged so we don't shutdown when we should. 475230f712c9SDave Chinner */ 475330f712c9SDave Chinner if (bma.logflags) 475430f712c9SDave Chinner xfs_trans_log_inode(tp, ip, bma.logflags); 475530f712c9SDave Chinner 475630f712c9SDave Chinner if (bma.cur) { 475730f712c9SDave Chinner if (!error) { 475830f712c9SDave Chinner ASSERT(*firstblock == NULLFSBLOCK || 4759410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, *firstblock) <= 476030f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, 4761410d17f6SChristoph Hellwig bma.cur->bc_private.b.firstblock)); 476230f712c9SDave Chinner *firstblock = bma.cur->bc_private.b.firstblock; 476330f712c9SDave Chinner } 476430f712c9SDave Chinner xfs_btree_del_cursor(bma.cur, 476530f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 476630f712c9SDave Chinner } 476730f712c9SDave Chinner if (!error) 476830f712c9SDave Chinner xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, 476930f712c9SDave Chinner orig_nmap, *nmap); 477030f712c9SDave Chinner return error; 477130f712c9SDave Chinner } 477230f712c9SDave Chinner 477330f712c9SDave Chinner /* 4774a9bd24acSBrian Foster * When a delalloc extent is split (e.g., due to a hole punch), the original 4775a9bd24acSBrian Foster * indlen reservation must be shared across the two new extents that are left 4776a9bd24acSBrian Foster * behind. 4777a9bd24acSBrian Foster * 4778a9bd24acSBrian Foster * Given the original reservation and the worst case indlen for the two new 4779a9bd24acSBrian Foster * extents (as calculated by xfs_bmap_worst_indlen()), split the original 4780d34999c9SBrian Foster * reservation fairly across the two new extents. If necessary, steal available 4781d34999c9SBrian Foster * blocks from a deleted extent to make up a reservation deficiency (e.g., if 4782d34999c9SBrian Foster * ores == 1). The number of stolen blocks is returned. The availability and 4783d34999c9SBrian Foster * subsequent accounting of stolen blocks is the responsibility of the caller. 4784a9bd24acSBrian Foster */ 4785d34999c9SBrian Foster static xfs_filblks_t 4786a9bd24acSBrian Foster xfs_bmap_split_indlen( 4787a9bd24acSBrian Foster xfs_filblks_t ores, /* original res. */ 4788a9bd24acSBrian Foster xfs_filblks_t *indlen1, /* ext1 worst indlen */ 4789d34999c9SBrian Foster xfs_filblks_t *indlen2, /* ext2 worst indlen */ 4790d34999c9SBrian Foster xfs_filblks_t avail) /* stealable blocks */ 4791a9bd24acSBrian Foster { 4792a9bd24acSBrian Foster xfs_filblks_t len1 = *indlen1; 4793a9bd24acSBrian Foster xfs_filblks_t len2 = *indlen2; 4794a9bd24acSBrian Foster xfs_filblks_t nres = len1 + len2; /* new total res. */ 4795d34999c9SBrian Foster xfs_filblks_t stolen = 0; 479675d65361SBrian Foster xfs_filblks_t resfactor; 4797a9bd24acSBrian Foster 4798a9bd24acSBrian Foster /* 4799d34999c9SBrian Foster * Steal as many blocks as we can to try and satisfy the worst case 4800d34999c9SBrian Foster * indlen for both new extents. 4801d34999c9SBrian Foster */ 480275d65361SBrian Foster if (ores < nres && avail) 480375d65361SBrian Foster stolen = XFS_FILBLKS_MIN(nres - ores, avail); 480475d65361SBrian Foster ores += stolen; 480575d65361SBrian Foster 480675d65361SBrian Foster /* nothing else to do if we've satisfied the new reservation */ 480775d65361SBrian Foster if (ores >= nres) 480875d65361SBrian Foster return stolen; 4809d34999c9SBrian Foster 4810d34999c9SBrian Foster /* 481175d65361SBrian Foster * We can't meet the total required reservation for the two extents. 481275d65361SBrian Foster * Calculate the percent of the overall shortage between both extents 481375d65361SBrian Foster * and apply this percentage to each of the requested indlen values. 481475d65361SBrian Foster * This distributes the shortage fairly and reduces the chances that one 481575d65361SBrian Foster * of the two extents is left with nothing when extents are repeatedly 481675d65361SBrian Foster * split. 4817a9bd24acSBrian Foster */ 481875d65361SBrian Foster resfactor = (ores * 100); 481975d65361SBrian Foster do_div(resfactor, nres); 482075d65361SBrian Foster len1 *= resfactor; 482175d65361SBrian Foster do_div(len1, 100); 482275d65361SBrian Foster len2 *= resfactor; 482375d65361SBrian Foster do_div(len2, 100); 482475d65361SBrian Foster ASSERT(len1 + len2 <= ores); 482575d65361SBrian Foster ASSERT(len1 < *indlen1 && len2 < *indlen2); 482675d65361SBrian Foster 482775d65361SBrian Foster /* 482875d65361SBrian Foster * Hand out the remainder to each extent. If one of the two reservations 482975d65361SBrian Foster * is zero, we want to make sure that one gets a block first. The loop 483075d65361SBrian Foster * below starts with len1, so hand len2 a block right off the bat if it 483175d65361SBrian Foster * is zero. 483275d65361SBrian Foster */ 483375d65361SBrian Foster ores -= (len1 + len2); 483475d65361SBrian Foster ASSERT((*indlen1 - len1) + (*indlen2 - len2) >= ores); 483575d65361SBrian Foster if (ores && !len2 && *indlen2) { 483675d65361SBrian Foster len2++; 483775d65361SBrian Foster ores--; 4838a9bd24acSBrian Foster } 483975d65361SBrian Foster while (ores) { 484075d65361SBrian Foster if (len1 < *indlen1) { 484175d65361SBrian Foster len1++; 484275d65361SBrian Foster ores--; 484375d65361SBrian Foster } 484475d65361SBrian Foster if (!ores) 4845a9bd24acSBrian Foster break; 484675d65361SBrian Foster if (len2 < *indlen2) { 484775d65361SBrian Foster len2++; 484875d65361SBrian Foster ores--; 4849a9bd24acSBrian Foster } 4850a9bd24acSBrian Foster } 4851a9bd24acSBrian Foster 4852a9bd24acSBrian Foster *indlen1 = len1; 4853a9bd24acSBrian Foster *indlen2 = len2; 4854d34999c9SBrian Foster 4855d34999c9SBrian Foster return stolen; 4856a9bd24acSBrian Foster } 4857a9bd24acSBrian Foster 4858fa5c836cSChristoph Hellwig int 4859fa5c836cSChristoph Hellwig xfs_bmap_del_extent_delay( 4860fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4861fa5c836cSChristoph Hellwig int whichfork, 4862fa5c836cSChristoph Hellwig xfs_extnum_t *idx, 4863fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 4864fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 4865fa5c836cSChristoph Hellwig { 4866fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 4867fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 4868fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 4869fa5c836cSChristoph Hellwig int64_t da_old, da_new, da_diff = 0; 4870fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 4871fa5c836cSChristoph Hellwig xfs_filblks_t got_indlen, new_indlen, stolen; 4872fa5c836cSChristoph Hellwig int error = 0, state = 0; 4873fa5c836cSChristoph Hellwig bool isrt; 4874fa5c836cSChristoph Hellwig 4875fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 4876fa5c836cSChristoph Hellwig 4877fa5c836cSChristoph Hellwig isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 4878fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 4879fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 4880fa5c836cSChristoph Hellwig da_old = startblockval(got->br_startblock); 4881fa5c836cSChristoph Hellwig da_new = 0; 4882fa5c836cSChristoph Hellwig 4883fa5c836cSChristoph Hellwig ASSERT(*idx >= 0); 48845d829300SEric Sandeen ASSERT(*idx <= xfs_iext_count(ifp)); 4885fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 4886fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 4887fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 4888fa5c836cSChristoph Hellwig 4889fa5c836cSChristoph Hellwig if (isrt) { 4890fa5c836cSChristoph Hellwig int64_t rtexts = XFS_FSB_TO_B(mp, del->br_blockcount); 4891fa5c836cSChristoph Hellwig 4892fa5c836cSChristoph Hellwig do_div(rtexts, mp->m_sb.sb_rextsize); 4893fa5c836cSChristoph Hellwig xfs_mod_frextents(mp, rtexts); 4894fa5c836cSChristoph Hellwig } 4895fa5c836cSChristoph Hellwig 4896fa5c836cSChristoph Hellwig /* 4897fa5c836cSChristoph Hellwig * Update the inode delalloc counter now and wait to update the 4898fa5c836cSChristoph Hellwig * sb counters as we might have to borrow some blocks for the 4899fa5c836cSChristoph Hellwig * indirect block accounting. 4900fa5c836cSChristoph Hellwig */ 49014fd29ec4SDarrick J. Wong error = xfs_trans_reserve_quota_nblks(NULL, ip, 49024fd29ec4SDarrick J. Wong -((long)del->br_blockcount), 0, 4903fa5c836cSChristoph Hellwig isrt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 49044fd29ec4SDarrick J. Wong if (error) 49054fd29ec4SDarrick J. Wong return error; 4906fa5c836cSChristoph Hellwig ip->i_delayed_blks -= del->br_blockcount; 4907fa5c836cSChristoph Hellwig 4908fa5c836cSChristoph Hellwig if (whichfork == XFS_COW_FORK) 4909fa5c836cSChristoph Hellwig state |= BMAP_COWFORK; 4910fa5c836cSChristoph Hellwig 4911fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 4912fa5c836cSChristoph Hellwig state |= BMAP_LEFT_CONTIG; 4913fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 4914fa5c836cSChristoph Hellwig state |= BMAP_RIGHT_CONTIG; 4915fa5c836cSChristoph Hellwig 4916fa5c836cSChristoph Hellwig switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 4917fa5c836cSChristoph Hellwig case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 4918fa5c836cSChristoph Hellwig /* 4919fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 4920fa5c836cSChristoph Hellwig */ 4921fa5c836cSChristoph Hellwig xfs_iext_remove(ip, *idx, 1, state); 4922fa5c836cSChristoph Hellwig --*idx; 4923fa5c836cSChristoph Hellwig break; 4924fa5c836cSChristoph Hellwig case BMAP_LEFT_CONTIG: 4925fa5c836cSChristoph Hellwig /* 4926fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 4927fa5c836cSChristoph Hellwig */ 4928fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4929fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 4930fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4931fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4932fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4933fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 4934fa5c836cSChristoph Hellwig xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); 4935fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4936fa5c836cSChristoph Hellwig break; 4937fa5c836cSChristoph Hellwig case BMAP_RIGHT_CONTIG: 4938fa5c836cSChristoph Hellwig /* 4939fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 4940fa5c836cSChristoph Hellwig */ 4941fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4942fa5c836cSChristoph Hellwig got->br_blockcount = got->br_blockcount - del->br_blockcount; 4943fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4944fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4945fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 4946fa5c836cSChristoph Hellwig xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); 4947fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4948fa5c836cSChristoph Hellwig break; 4949fa5c836cSChristoph Hellwig case 0: 4950fa5c836cSChristoph Hellwig /* 4951fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 4952fa5c836cSChristoph Hellwig * 4953fa5c836cSChristoph Hellwig * Distribute the original indlen reservation across the two new 4954fa5c836cSChristoph Hellwig * extents. Steal blocks from the deleted extent if necessary. 4955fa5c836cSChristoph Hellwig * Stealing blocks simply fudges the fdblocks accounting below. 4956fa5c836cSChristoph Hellwig * Warn if either of the new indlen reservations is zero as this 4957fa5c836cSChristoph Hellwig * can lead to delalloc problems. 4958fa5c836cSChristoph Hellwig */ 4959fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4960fa5c836cSChristoph Hellwig 4961fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 4962fa5c836cSChristoph Hellwig got_indlen = xfs_bmap_worst_indlen(ip, got->br_blockcount); 4963fa5c836cSChristoph Hellwig 4964fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 4965fa5c836cSChristoph Hellwig new_indlen = xfs_bmap_worst_indlen(ip, new.br_blockcount); 4966fa5c836cSChristoph Hellwig 4967fa5c836cSChristoph Hellwig WARN_ON_ONCE(!got_indlen || !new_indlen); 4968fa5c836cSChristoph Hellwig stolen = xfs_bmap_split_indlen(da_old, &got_indlen, &new_indlen, 4969fa5c836cSChristoph Hellwig del->br_blockcount); 4970fa5c836cSChristoph Hellwig 4971fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)got_indlen); 4972fa5c836cSChristoph Hellwig xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); 4973fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, 0, _THIS_IP_); 4974fa5c836cSChristoph Hellwig 4975fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 4976fa5c836cSChristoph Hellwig new.br_state = got->br_state; 4977fa5c836cSChristoph Hellwig new.br_startblock = nullstartblock((int)new_indlen); 4978fa5c836cSChristoph Hellwig 4979fa5c836cSChristoph Hellwig ++*idx; 4980fa5c836cSChristoph Hellwig xfs_iext_insert(ip, *idx, 1, &new, state); 4981fa5c836cSChristoph Hellwig 4982fa5c836cSChristoph Hellwig da_new = got_indlen + new_indlen - stolen; 4983fa5c836cSChristoph Hellwig del->br_blockcount -= stolen; 4984fa5c836cSChristoph Hellwig break; 4985fa5c836cSChristoph Hellwig } 4986fa5c836cSChristoph Hellwig 4987fa5c836cSChristoph Hellwig ASSERT(da_old >= da_new); 4988fa5c836cSChristoph Hellwig da_diff = da_old - da_new; 4989fa5c836cSChristoph Hellwig if (!isrt) 4990fa5c836cSChristoph Hellwig da_diff += del->br_blockcount; 4991fa5c836cSChristoph Hellwig if (da_diff) 4992fa5c836cSChristoph Hellwig xfs_mod_fdblocks(mp, da_diff, false); 4993fa5c836cSChristoph Hellwig return error; 4994fa5c836cSChristoph Hellwig } 4995fa5c836cSChristoph Hellwig 4996fa5c836cSChristoph Hellwig void 4997fa5c836cSChristoph Hellwig xfs_bmap_del_extent_cow( 4998fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4999fa5c836cSChristoph Hellwig xfs_extnum_t *idx, 5000fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 5001fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 5002fa5c836cSChristoph Hellwig { 5003fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 5004fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); 5005fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 5006fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 5007fa5c836cSChristoph Hellwig int state = BMAP_COWFORK; 5008fa5c836cSChristoph Hellwig 5009fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 5010fa5c836cSChristoph Hellwig 5011fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 5012fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 5013fa5c836cSChristoph Hellwig 5014fa5c836cSChristoph Hellwig ASSERT(*idx >= 0); 50155d829300SEric Sandeen ASSERT(*idx <= xfs_iext_count(ifp)); 5016fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 5017fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 5018fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 5019fa5c836cSChristoph Hellwig ASSERT(!isnullstartblock(got->br_startblock)); 5020fa5c836cSChristoph Hellwig 5021fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 5022fa5c836cSChristoph Hellwig state |= BMAP_LEFT_CONTIG; 5023fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 5024fa5c836cSChristoph Hellwig state |= BMAP_RIGHT_CONTIG; 5025fa5c836cSChristoph Hellwig 5026fa5c836cSChristoph Hellwig switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 5027fa5c836cSChristoph Hellwig case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 5028fa5c836cSChristoph Hellwig /* 5029fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 5030fa5c836cSChristoph Hellwig */ 5031fa5c836cSChristoph Hellwig xfs_iext_remove(ip, *idx, 1, state); 5032fa5c836cSChristoph Hellwig --*idx; 5033fa5c836cSChristoph Hellwig break; 5034fa5c836cSChristoph Hellwig case BMAP_LEFT_CONTIG: 5035fa5c836cSChristoph Hellwig /* 5036fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 5037fa5c836cSChristoph Hellwig */ 5038fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 5039fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 5040fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 5041fa5c836cSChristoph Hellwig got->br_startblock = del->br_startblock + del->br_blockcount; 5042fa5c836cSChristoph Hellwig xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); 5043fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 5044fa5c836cSChristoph Hellwig break; 5045fa5c836cSChristoph Hellwig case BMAP_RIGHT_CONTIG: 5046fa5c836cSChristoph Hellwig /* 5047fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 5048fa5c836cSChristoph Hellwig */ 5049fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 5050fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 5051fa5c836cSChristoph Hellwig xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); 5052fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 5053fa5c836cSChristoph Hellwig break; 5054fa5c836cSChristoph Hellwig case 0: 5055fa5c836cSChristoph Hellwig /* 5056fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 5057fa5c836cSChristoph Hellwig */ 5058fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 5059fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 5060fa5c836cSChristoph Hellwig xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); 5061fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 5062fa5c836cSChristoph Hellwig 5063fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 5064fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 5065fa5c836cSChristoph Hellwig new.br_state = got->br_state; 5066fa5c836cSChristoph Hellwig new.br_startblock = del->br_startblock + del->br_blockcount; 5067fa5c836cSChristoph Hellwig 5068fa5c836cSChristoph Hellwig ++*idx; 5069fa5c836cSChristoph Hellwig xfs_iext_insert(ip, *idx, 1, &new, state); 5070fa5c836cSChristoph Hellwig break; 5071fa5c836cSChristoph Hellwig } 5072fa5c836cSChristoph Hellwig } 5073fa5c836cSChristoph Hellwig 5074a9bd24acSBrian Foster /* 507530f712c9SDave Chinner * Called by xfs_bmapi to update file extent records and the btree 507630f712c9SDave Chinner * after removing space (or undoing a delayed allocation). 507730f712c9SDave Chinner */ 507830f712c9SDave Chinner STATIC int /* error */ 507930f712c9SDave Chinner xfs_bmap_del_extent( 508030f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 508130f712c9SDave Chinner xfs_trans_t *tp, /* current transaction pointer */ 508230f712c9SDave Chinner xfs_extnum_t *idx, /* extent number to update/delete */ 50832c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* list of extents to be freed */ 508430f712c9SDave Chinner xfs_btree_cur_t *cur, /* if null, not a btree */ 508530f712c9SDave Chinner xfs_bmbt_irec_t *del, /* data to remove from extents */ 508630f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 50874847acf8SDarrick J. Wong int whichfork, /* data or attr fork */ 50884847acf8SDarrick J. Wong int bflags) /* bmapi flags */ 508930f712c9SDave Chinner { 509030f712c9SDave Chinner xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ 509130f712c9SDave Chinner xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ 509230f712c9SDave Chinner xfs_fsblock_t del_endblock=0; /* first block past del */ 509330f712c9SDave Chinner xfs_fileoff_t del_endoff; /* first offset past del */ 509430f712c9SDave Chinner int delay; /* current block is delayed allocated */ 509530f712c9SDave Chinner int do_fx; /* free extent at end of routine */ 509630f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */ 509730f712c9SDave Chinner int error; /* error return value */ 509830f712c9SDave Chinner int flags; /* inode logging flags */ 509930f712c9SDave Chinner xfs_bmbt_irec_t got; /* current extent entry */ 510030f712c9SDave Chinner xfs_fileoff_t got_endoff; /* first offset past got */ 510130f712c9SDave Chinner int i; /* temp state */ 510230f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 510330f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 510430f712c9SDave Chinner xfs_filblks_t nblks; /* quota/sb block count */ 510530f712c9SDave Chinner xfs_bmbt_irec_t new; /* new record to be inserted */ 510630f712c9SDave Chinner /* REFERENCED */ 510730f712c9SDave Chinner uint qfield; /* quota field to update */ 510830f712c9SDave Chinner xfs_filblks_t temp; /* for indirect length calculations */ 510930f712c9SDave Chinner xfs_filblks_t temp2; /* for indirect length calculations */ 511030f712c9SDave Chinner int state = 0; 511130f712c9SDave Chinner 5112ff6d6af2SBill O'Donnell mp = ip->i_mount; 5113ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_del_exlist); 511430f712c9SDave Chinner 511530f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK) 511630f712c9SDave Chinner state |= BMAP_ATTRFORK; 51173993baebSDarrick J. Wong else if (whichfork == XFS_COW_FORK) 51183993baebSDarrick J. Wong state |= BMAP_COWFORK; 511930f712c9SDave Chinner 512030f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 51215d829300SEric Sandeen ASSERT((*idx >= 0) && (*idx < xfs_iext_count(ifp))); 512230f712c9SDave Chinner ASSERT(del->br_blockcount > 0); 512330f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, *idx); 512430f712c9SDave Chinner xfs_bmbt_get_all(ep, &got); 512530f712c9SDave Chinner ASSERT(got.br_startoff <= del->br_startoff); 512630f712c9SDave Chinner del_endoff = del->br_startoff + del->br_blockcount; 512730f712c9SDave Chinner got_endoff = got.br_startoff + got.br_blockcount; 512830f712c9SDave Chinner ASSERT(got_endoff >= del_endoff); 512930f712c9SDave Chinner delay = isnullstartblock(got.br_startblock); 513030f712c9SDave Chinner ASSERT(isnullstartblock(del->br_startblock) == delay); 513130f712c9SDave Chinner flags = 0; 513230f712c9SDave Chinner qfield = 0; 513330f712c9SDave Chinner error = 0; 513430f712c9SDave Chinner /* 513530f712c9SDave Chinner * If deleting a real allocation, must free up the disk space. 513630f712c9SDave Chinner */ 513730f712c9SDave Chinner if (!delay) { 513830f712c9SDave Chinner flags = XFS_ILOG_CORE; 513930f712c9SDave Chinner /* 514030f712c9SDave Chinner * Realtime allocation. Free it and record di_nblocks update. 514130f712c9SDave Chinner */ 514230f712c9SDave Chinner if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { 514330f712c9SDave Chinner xfs_fsblock_t bno; 514430f712c9SDave Chinner xfs_filblks_t len; 514530f712c9SDave Chinner 514630f712c9SDave Chinner ASSERT(do_mod(del->br_blockcount, 514730f712c9SDave Chinner mp->m_sb.sb_rextsize) == 0); 514830f712c9SDave Chinner ASSERT(do_mod(del->br_startblock, 514930f712c9SDave Chinner mp->m_sb.sb_rextsize) == 0); 515030f712c9SDave Chinner bno = del->br_startblock; 515130f712c9SDave Chinner len = del->br_blockcount; 515230f712c9SDave Chinner do_div(bno, mp->m_sb.sb_rextsize); 515330f712c9SDave Chinner do_div(len, mp->m_sb.sb_rextsize); 515430f712c9SDave Chinner error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); 515530f712c9SDave Chinner if (error) 515630f712c9SDave Chinner goto done; 515730f712c9SDave Chinner do_fx = 0; 515830f712c9SDave Chinner nblks = len * mp->m_sb.sb_rextsize; 515930f712c9SDave Chinner qfield = XFS_TRANS_DQ_RTBCOUNT; 516030f712c9SDave Chinner } 516130f712c9SDave Chinner /* 516230f712c9SDave Chinner * Ordinary allocation. 516330f712c9SDave Chinner */ 516430f712c9SDave Chinner else { 516530f712c9SDave Chinner do_fx = 1; 516630f712c9SDave Chinner nblks = del->br_blockcount; 516730f712c9SDave Chinner qfield = XFS_TRANS_DQ_BCOUNT; 516830f712c9SDave Chinner } 516930f712c9SDave Chinner /* 517030f712c9SDave Chinner * Set up del_endblock and cur for later. 517130f712c9SDave Chinner */ 517230f712c9SDave Chinner del_endblock = del->br_startblock + del->br_blockcount; 517330f712c9SDave Chinner if (cur) { 517430f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, 517530f712c9SDave Chinner got.br_startblock, got.br_blockcount, 517630f712c9SDave Chinner &i))) 517730f712c9SDave Chinner goto done; 5178c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 517930f712c9SDave Chinner } 518030f712c9SDave Chinner da_old = da_new = 0; 518130f712c9SDave Chinner } else { 518230f712c9SDave Chinner da_old = startblockval(got.br_startblock); 518330f712c9SDave Chinner da_new = 0; 518430f712c9SDave Chinner nblks = 0; 518530f712c9SDave Chinner do_fx = 0; 518630f712c9SDave Chinner } 5187340785ccSDarrick J. Wong 518830f712c9SDave Chinner /* 518930f712c9SDave Chinner * Set flag value to use in switch statement. 519030f712c9SDave Chinner * Left-contig is 2, right-contig is 1. 519130f712c9SDave Chinner */ 519230f712c9SDave Chinner switch (((got.br_startoff == del->br_startoff) << 1) | 519330f712c9SDave Chinner (got_endoff == del_endoff)) { 519430f712c9SDave Chinner case 3: 519530f712c9SDave Chinner /* 519630f712c9SDave Chinner * Matches the whole extent. Delete the entry. 519730f712c9SDave Chinner */ 51984862cfe8SDarrick J. Wong trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 519930f712c9SDave Chinner xfs_iext_remove(ip, *idx, 1, 520030f712c9SDave Chinner whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); 520130f712c9SDave Chinner --*idx; 520230f712c9SDave Chinner if (delay) 520330f712c9SDave Chinner break; 520430f712c9SDave Chinner 520530f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 520630f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 520730f712c9SDave Chinner flags |= XFS_ILOG_CORE; 520830f712c9SDave Chinner if (!cur) { 520930f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 521030f712c9SDave Chinner break; 521130f712c9SDave Chinner } 521230f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 521330f712c9SDave Chinner goto done; 5214c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 521530f712c9SDave Chinner break; 521630f712c9SDave Chinner 521730f712c9SDave Chinner case 2: 521830f712c9SDave Chinner /* 521930f712c9SDave Chinner * Deleting the first part of the extent. 522030f712c9SDave Chinner */ 522130f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 522230f712c9SDave Chinner xfs_bmbt_set_startoff(ep, del_endoff); 522330f712c9SDave Chinner temp = got.br_blockcount - del->br_blockcount; 522430f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 522530f712c9SDave Chinner if (delay) { 522630f712c9SDave Chinner temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 522730f712c9SDave Chinner da_old); 522830f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); 522930f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 523030f712c9SDave Chinner da_new = temp; 523130f712c9SDave Chinner break; 523230f712c9SDave Chinner } 523330f712c9SDave Chinner xfs_bmbt_set_startblock(ep, del_endblock); 523430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 523530f712c9SDave Chinner if (!cur) { 523630f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 523730f712c9SDave Chinner break; 523830f712c9SDave Chinner } 523930f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, 524030f712c9SDave Chinner got.br_blockcount - del->br_blockcount, 524130f712c9SDave Chinner got.br_state))) 524230f712c9SDave Chinner goto done; 524330f712c9SDave Chinner break; 524430f712c9SDave Chinner 524530f712c9SDave Chinner case 1: 524630f712c9SDave Chinner /* 524730f712c9SDave Chinner * Deleting the last part of the extent. 524830f712c9SDave Chinner */ 524930f712c9SDave Chinner temp = got.br_blockcount - del->br_blockcount; 525030f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 525130f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 525230f712c9SDave Chinner if (delay) { 525330f712c9SDave Chinner temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 525430f712c9SDave Chinner da_old); 525530f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); 525630f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 525730f712c9SDave Chinner da_new = temp; 525830f712c9SDave Chinner break; 525930f712c9SDave Chinner } 526030f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 526130f712c9SDave Chinner if (!cur) { 526230f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 526330f712c9SDave Chinner break; 526430f712c9SDave Chinner } 526530f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, got.br_startoff, 526630f712c9SDave Chinner got.br_startblock, 526730f712c9SDave Chinner got.br_blockcount - del->br_blockcount, 526830f712c9SDave Chinner got.br_state))) 526930f712c9SDave Chinner goto done; 527030f712c9SDave Chinner break; 527130f712c9SDave Chinner 527230f712c9SDave Chinner case 0: 527330f712c9SDave Chinner /* 527430f712c9SDave Chinner * Deleting the middle of the extent. 527530f712c9SDave Chinner */ 527630f712c9SDave Chinner temp = del->br_startoff - got.br_startoff; 527730f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 527830f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, temp); 527930f712c9SDave Chinner new.br_startoff = del_endoff; 528030f712c9SDave Chinner temp2 = got_endoff - del_endoff; 528130f712c9SDave Chinner new.br_blockcount = temp2; 528230f712c9SDave Chinner new.br_state = got.br_state; 528330f712c9SDave Chinner if (!delay) { 528430f712c9SDave Chinner new.br_startblock = del_endblock; 528530f712c9SDave Chinner flags |= XFS_ILOG_CORE; 528630f712c9SDave Chinner if (cur) { 528730f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, 528830f712c9SDave Chinner got.br_startoff, 528930f712c9SDave Chinner got.br_startblock, temp, 529030f712c9SDave Chinner got.br_state))) 529130f712c9SDave Chinner goto done; 529230f712c9SDave Chinner if ((error = xfs_btree_increment(cur, 0, &i))) 529330f712c9SDave Chinner goto done; 529430f712c9SDave Chinner cur->bc_rec.b = new; 529530f712c9SDave Chinner error = xfs_btree_insert(cur, &i); 52962451337dSDave Chinner if (error && error != -ENOSPC) 529730f712c9SDave Chinner goto done; 529830f712c9SDave Chinner /* 529930f712c9SDave Chinner * If get no-space back from btree insert, 530030f712c9SDave Chinner * it tried a split, and we have a zero 530130f712c9SDave Chinner * block reservation. 530230f712c9SDave Chinner * Fix up our state and return the error. 530330f712c9SDave Chinner */ 53042451337dSDave Chinner if (error == -ENOSPC) { 530530f712c9SDave Chinner /* 530630f712c9SDave Chinner * Reset the cursor, don't trust 530730f712c9SDave Chinner * it after any insert operation. 530830f712c9SDave Chinner */ 530930f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, 531030f712c9SDave Chinner got.br_startoff, 531130f712c9SDave Chinner got.br_startblock, 531230f712c9SDave Chinner temp, &i))) 531330f712c9SDave Chinner goto done; 5314c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 5315c29aad41SEric Sandeen i == 1, done); 531630f712c9SDave Chinner /* 531730f712c9SDave Chinner * Update the btree record back 531830f712c9SDave Chinner * to the original value. 531930f712c9SDave Chinner */ 532030f712c9SDave Chinner if ((error = xfs_bmbt_update(cur, 532130f712c9SDave Chinner got.br_startoff, 532230f712c9SDave Chinner got.br_startblock, 532330f712c9SDave Chinner got.br_blockcount, 532430f712c9SDave Chinner got.br_state))) 532530f712c9SDave Chinner goto done; 532630f712c9SDave Chinner /* 532730f712c9SDave Chinner * Reset the extent record back 532830f712c9SDave Chinner * to the original value. 532930f712c9SDave Chinner */ 533030f712c9SDave Chinner xfs_bmbt_set_blockcount(ep, 533130f712c9SDave Chinner got.br_blockcount); 533230f712c9SDave Chinner flags = 0; 53332451337dSDave Chinner error = -ENOSPC; 533430f712c9SDave Chinner goto done; 533530f712c9SDave Chinner } 5336c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 533730f712c9SDave Chinner } else 533830f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 533930f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 534030f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 534130f712c9SDave Chinner } else { 5342d34999c9SBrian Foster xfs_filblks_t stolen; 534330f712c9SDave Chinner ASSERT(whichfork == XFS_DATA_FORK); 5344a9bd24acSBrian Foster 5345a9bd24acSBrian Foster /* 5346a9bd24acSBrian Foster * Distribute the original indlen reservation across the 5347d34999c9SBrian Foster * two new extents. Steal blocks from the deleted extent 5348d34999c9SBrian Foster * if necessary. Stealing blocks simply fudges the 5349d34999c9SBrian Foster * fdblocks accounting in xfs_bunmapi(). 5350a9bd24acSBrian Foster */ 5351a9bd24acSBrian Foster temp = xfs_bmap_worst_indlen(ip, got.br_blockcount); 5352a9bd24acSBrian Foster temp2 = xfs_bmap_worst_indlen(ip, new.br_blockcount); 5353d34999c9SBrian Foster stolen = xfs_bmap_split_indlen(da_old, &temp, &temp2, 5354d34999c9SBrian Foster del->br_blockcount); 5355d34999c9SBrian Foster da_new = temp + temp2 - stolen; 5356d34999c9SBrian Foster del->br_blockcount -= stolen; 5357a9bd24acSBrian Foster 5358a9bd24acSBrian Foster /* 5359d34999c9SBrian Foster * Set the reservation for each extent. Warn if either 5360d34999c9SBrian Foster * is zero as this can lead to delalloc problems. 5361a9bd24acSBrian Foster */ 5362d34999c9SBrian Foster WARN_ON_ONCE(!temp || !temp2); 536330f712c9SDave Chinner xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); 536430f712c9SDave Chinner new.br_startblock = nullstartblock((int)temp2); 536530f712c9SDave Chinner } 536630f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 536730f712c9SDave Chinner xfs_iext_insert(ip, *idx + 1, 1, &new, state); 536830f712c9SDave Chinner ++*idx; 536930f712c9SDave Chinner break; 537030f712c9SDave Chinner } 53719c194644SDarrick J. Wong 53729c194644SDarrick J. Wong /* remove reverse mapping */ 53739c194644SDarrick J. Wong if (!delay) { 53749c194644SDarrick J. Wong error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, del); 53759c194644SDarrick J. Wong if (error) 53769c194644SDarrick J. Wong goto done; 53779c194644SDarrick J. Wong } 53789c194644SDarrick J. Wong 537930f712c9SDave Chinner /* 538030f712c9SDave Chinner * If we need to, add to list of extents to delete. 538130f712c9SDave Chinner */ 53824847acf8SDarrick J. Wong if (do_fx && !(bflags & XFS_BMAPI_REMAP)) { 538362aab20fSDarrick J. Wong if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) { 538462aab20fSDarrick J. Wong error = xfs_refcount_decrease_extent(mp, dfops, del); 538562aab20fSDarrick J. Wong if (error) 538662aab20fSDarrick J. Wong goto done; 538762aab20fSDarrick J. Wong } else 53882c3234d1SDarrick J. Wong xfs_bmap_add_free(mp, dfops, del->br_startblock, 5389340785ccSDarrick J. Wong del->br_blockcount, NULL); 539062aab20fSDarrick J. Wong } 539162aab20fSDarrick J. Wong 539230f712c9SDave Chinner /* 539330f712c9SDave Chinner * Adjust inode # blocks in the file. 539430f712c9SDave Chinner */ 539530f712c9SDave Chinner if (nblks) 539630f712c9SDave Chinner ip->i_d.di_nblocks -= nblks; 539730f712c9SDave Chinner /* 539830f712c9SDave Chinner * Adjust quota data. 539930f712c9SDave Chinner */ 54004847acf8SDarrick J. Wong if (qfield && !(bflags & XFS_BMAPI_REMAP)) 540130f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); 540230f712c9SDave Chinner 540330f712c9SDave Chinner /* 540430f712c9SDave Chinner * Account for change in delayed indirect blocks. 540530f712c9SDave Chinner * Nothing to do for disk quota accounting here. 540630f712c9SDave Chinner */ 540730f712c9SDave Chinner ASSERT(da_old >= da_new); 54080d485adaSDave Chinner if (da_old > da_new) 54090d485adaSDave Chinner xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), false); 541030f712c9SDave Chinner done: 541130f712c9SDave Chinner *logflagsp = flags; 541230f712c9SDave Chinner return error; 541330f712c9SDave Chinner } 541430f712c9SDave Chinner 541530f712c9SDave Chinner /* 541630f712c9SDave Chinner * Unmap (remove) blocks from a file. 541730f712c9SDave Chinner * If nexts is nonzero then the number of extents to remove is limited to 541830f712c9SDave Chinner * that value. If not all extents in the block range can be removed then 541930f712c9SDave Chinner * *done is set. 542030f712c9SDave Chinner */ 542130f712c9SDave Chinner int /* error */ 54224453593bSDarrick J. Wong __xfs_bunmapi( 542330f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 542430f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 542530f712c9SDave Chinner xfs_fileoff_t bno, /* starting offset to unmap */ 54264453593bSDarrick J. Wong xfs_filblks_t *rlen, /* i/o: amount remaining */ 542730f712c9SDave Chinner int flags, /* misc flags */ 542830f712c9SDave Chinner xfs_extnum_t nexts, /* number of extents max */ 542930f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first allocated block 543030f712c9SDave Chinner controls a.g. for allocs */ 54314453593bSDarrick J. Wong struct xfs_defer_ops *dfops) /* i/o: deferred updates */ 543230f712c9SDave Chinner { 543330f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 543430f712c9SDave Chinner xfs_bmbt_irec_t del; /* extent being deleted */ 543530f712c9SDave Chinner int error; /* error return value */ 543630f712c9SDave Chinner xfs_extnum_t extno; /* extent number in list */ 543730f712c9SDave Chinner xfs_bmbt_irec_t got; /* current extent record */ 543830f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 543930f712c9SDave Chinner int isrt; /* freeing in rt area */ 544030f712c9SDave Chinner xfs_extnum_t lastx; /* last extent index used */ 544130f712c9SDave Chinner int logflags; /* transaction logging flags */ 544230f712c9SDave Chinner xfs_extlen_t mod; /* rt extent offset */ 544330f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 544430f712c9SDave Chinner xfs_fileoff_t start; /* first file offset deleted */ 544530f712c9SDave Chinner int tmp_logflags; /* partial logging flags */ 544630f712c9SDave Chinner int wasdel; /* was a delayed alloc extent */ 544730f712c9SDave Chinner int whichfork; /* data or attribute fork */ 544830f712c9SDave Chinner xfs_fsblock_t sum; 54494453593bSDarrick J. Wong xfs_filblks_t len = *rlen; /* length to unmap in file */ 545030f712c9SDave Chinner 545130f712c9SDave Chinner trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_); 545230f712c9SDave Chinner 54533993baebSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 54543993baebSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 545530f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 545630f712c9SDave Chinner if (unlikely( 545730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 545830f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { 545930f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, 546030f712c9SDave Chinner ip->i_mount); 54612451337dSDave Chinner return -EFSCORRUPTED; 546230f712c9SDave Chinner } 546330f712c9SDave Chinner mp = ip->i_mount; 546430f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 54652451337dSDave Chinner return -EIO; 546630f712c9SDave Chinner 546730f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 546830f712c9SDave Chinner ASSERT(len > 0); 546930f712c9SDave Chinner ASSERT(nexts >= 0); 547030f712c9SDave Chinner 547130f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS) && 547230f712c9SDave Chinner (error = xfs_iread_extents(tp, ip, whichfork))) 547330f712c9SDave Chinner return error; 54745d829300SEric Sandeen if (xfs_iext_count(ifp) == 0) { 54754453593bSDarrick J. Wong *rlen = 0; 547630f712c9SDave Chinner return 0; 547730f712c9SDave Chinner } 5478ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_unmap); 547930f712c9SDave Chinner isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 548030f712c9SDave Chinner start = bno; 548130f712c9SDave Chinner bno = start + len - 1; 548230f712c9SDave Chinner 548330f712c9SDave Chinner /* 548430f712c9SDave Chinner * Check to see if the given block number is past the end of the 548530f712c9SDave Chinner * file, back up to the last block if so... 548630f712c9SDave Chinner */ 54877efc7945SChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &lastx, &got)) { 54887efc7945SChristoph Hellwig ASSERT(lastx > 0); 54897efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, --lastx, &got); 549030f712c9SDave Chinner bno = got.br_startoff + got.br_blockcount - 1; 549130f712c9SDave Chinner } 54927efc7945SChristoph Hellwig 549330f712c9SDave Chinner logflags = 0; 549430f712c9SDave Chinner if (ifp->if_flags & XFS_IFBROOT) { 549530f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); 549630f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 549730f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 54982c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 549930f712c9SDave Chinner cur->bc_private.b.flags = 0; 550030f712c9SDave Chinner } else 550130f712c9SDave Chinner cur = NULL; 550230f712c9SDave Chinner 550330f712c9SDave Chinner if (isrt) { 550430f712c9SDave Chinner /* 550530f712c9SDave Chinner * Synchronize by locking the bitmap inode. 550630f712c9SDave Chinner */ 5507f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); 550830f712c9SDave Chinner xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); 5509f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); 5510f4a0660dSDarrick J. Wong xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); 551130f712c9SDave Chinner } 551230f712c9SDave Chinner 551330f712c9SDave Chinner extno = 0; 551430f712c9SDave Chinner while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && 551530f712c9SDave Chinner (nexts == 0 || extno < nexts)) { 551630f712c9SDave Chinner /* 551730f712c9SDave Chinner * Is the found extent after a hole in which bno lives? 551830f712c9SDave Chinner * Just back up to the previous extent, if so. 551930f712c9SDave Chinner */ 552030f712c9SDave Chinner if (got.br_startoff > bno) { 552130f712c9SDave Chinner if (--lastx < 0) 552230f712c9SDave Chinner break; 55237efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 552430f712c9SDave Chinner } 552530f712c9SDave Chinner /* 552630f712c9SDave Chinner * Is the last block of this extent before the range 552730f712c9SDave Chinner * we're supposed to delete? If so, we're done. 552830f712c9SDave Chinner */ 552930f712c9SDave Chinner bno = XFS_FILEOFF_MIN(bno, 553030f712c9SDave Chinner got.br_startoff + got.br_blockcount - 1); 553130f712c9SDave Chinner if (bno < start) 553230f712c9SDave Chinner break; 553330f712c9SDave Chinner /* 553430f712c9SDave Chinner * Then deal with the (possibly delayed) allocated space 553530f712c9SDave Chinner * we found. 553630f712c9SDave Chinner */ 553730f712c9SDave Chinner del = got; 553830f712c9SDave Chinner wasdel = isnullstartblock(del.br_startblock); 553930f712c9SDave Chinner if (got.br_startoff < start) { 554030f712c9SDave Chinner del.br_startoff = start; 554130f712c9SDave Chinner del.br_blockcount -= start - got.br_startoff; 554230f712c9SDave Chinner if (!wasdel) 554330f712c9SDave Chinner del.br_startblock += start - got.br_startoff; 554430f712c9SDave Chinner } 554530f712c9SDave Chinner if (del.br_startoff + del.br_blockcount > bno + 1) 554630f712c9SDave Chinner del.br_blockcount = bno + 1 - del.br_startoff; 554730f712c9SDave Chinner sum = del.br_startblock + del.br_blockcount; 554830f712c9SDave Chinner if (isrt && 554930f712c9SDave Chinner (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { 555030f712c9SDave Chinner /* 555130f712c9SDave Chinner * Realtime extent not lined up at the end. 555230f712c9SDave Chinner * The extent could have been split into written 555330f712c9SDave Chinner * and unwritten pieces, or we could just be 555430f712c9SDave Chinner * unmapping part of it. But we can't really 555530f712c9SDave Chinner * get rid of part of a realtime extent. 555630f712c9SDave Chinner */ 555730f712c9SDave Chinner if (del.br_state == XFS_EXT_UNWRITTEN || 555830f712c9SDave Chinner !xfs_sb_version_hasextflgbit(&mp->m_sb)) { 555930f712c9SDave Chinner /* 556030f712c9SDave Chinner * This piece is unwritten, or we're not 556130f712c9SDave Chinner * using unwritten extents. Skip over it. 556230f712c9SDave Chinner */ 556330f712c9SDave Chinner ASSERT(bno >= mod); 556430f712c9SDave Chinner bno -= mod > del.br_blockcount ? 556530f712c9SDave Chinner del.br_blockcount : mod; 556630f712c9SDave Chinner if (bno < got.br_startoff) { 556730f712c9SDave Chinner if (--lastx >= 0) 556830f712c9SDave Chinner xfs_bmbt_get_all(xfs_iext_get_ext( 556930f712c9SDave Chinner ifp, lastx), &got); 557030f712c9SDave Chinner } 557130f712c9SDave Chinner continue; 557230f712c9SDave Chinner } 557330f712c9SDave Chinner /* 557430f712c9SDave Chinner * It's written, turn it unwritten. 557530f712c9SDave Chinner * This is better than zeroing it. 557630f712c9SDave Chinner */ 557730f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 5578a7e5d03bSChristoph Hellwig ASSERT(tp->t_blk_res > 0); 557930f712c9SDave Chinner /* 558030f712c9SDave Chinner * If this spans a realtime extent boundary, 558130f712c9SDave Chinner * chop it back to the start of the one we end at. 558230f712c9SDave Chinner */ 558330f712c9SDave Chinner if (del.br_blockcount > mod) { 558430f712c9SDave Chinner del.br_startoff += del.br_blockcount - mod; 558530f712c9SDave Chinner del.br_startblock += del.br_blockcount - mod; 558630f712c9SDave Chinner del.br_blockcount = mod; 558730f712c9SDave Chinner } 558830f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 558930f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, ip, 559005a630d7SDarrick J. Wong whichfork, &lastx, &cur, &del, 559105a630d7SDarrick J. Wong firstblock, dfops, &logflags); 559230f712c9SDave Chinner if (error) 559330f712c9SDave Chinner goto error0; 559430f712c9SDave Chinner goto nodelete; 559530f712c9SDave Chinner } 559630f712c9SDave Chinner if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { 559730f712c9SDave Chinner /* 559830f712c9SDave Chinner * Realtime extent is lined up at the end but not 559930f712c9SDave Chinner * at the front. We'll get rid of full extents if 560030f712c9SDave Chinner * we can. 560130f712c9SDave Chinner */ 560230f712c9SDave Chinner mod = mp->m_sb.sb_rextsize - mod; 560330f712c9SDave Chinner if (del.br_blockcount > mod) { 560430f712c9SDave Chinner del.br_blockcount -= mod; 560530f712c9SDave Chinner del.br_startoff += mod; 560630f712c9SDave Chinner del.br_startblock += mod; 560730f712c9SDave Chinner } else if ((del.br_startoff == start && 560830f712c9SDave Chinner (del.br_state == XFS_EXT_UNWRITTEN || 5609a7e5d03bSChristoph Hellwig tp->t_blk_res == 0)) || 561030f712c9SDave Chinner !xfs_sb_version_hasextflgbit(&mp->m_sb)) { 561130f712c9SDave Chinner /* 561230f712c9SDave Chinner * Can't make it unwritten. There isn't 561330f712c9SDave Chinner * a full extent here so just skip it. 561430f712c9SDave Chinner */ 561530f712c9SDave Chinner ASSERT(bno >= del.br_blockcount); 561630f712c9SDave Chinner bno -= del.br_blockcount; 56177efc7945SChristoph Hellwig if (got.br_startoff > bno && --lastx >= 0) 56187efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 561930f712c9SDave Chinner continue; 562030f712c9SDave Chinner } else if (del.br_state == XFS_EXT_UNWRITTEN) { 56217efc7945SChristoph Hellwig struct xfs_bmbt_irec prev; 56227efc7945SChristoph Hellwig 562330f712c9SDave Chinner /* 562430f712c9SDave Chinner * This one is already unwritten. 562530f712c9SDave Chinner * It must have a written left neighbor. 562630f712c9SDave Chinner * Unwrite the killed part of that one and 562730f712c9SDave Chinner * try again. 562830f712c9SDave Chinner */ 562930f712c9SDave Chinner ASSERT(lastx > 0); 56307efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx - 1, &prev); 563130f712c9SDave Chinner ASSERT(prev.br_state == XFS_EXT_NORM); 563230f712c9SDave Chinner ASSERT(!isnullstartblock(prev.br_startblock)); 563330f712c9SDave Chinner ASSERT(del.br_startblock == 563430f712c9SDave Chinner prev.br_startblock + prev.br_blockcount); 563530f712c9SDave Chinner if (prev.br_startoff < start) { 563630f712c9SDave Chinner mod = start - prev.br_startoff; 563730f712c9SDave Chinner prev.br_blockcount -= mod; 563830f712c9SDave Chinner prev.br_startblock += mod; 563930f712c9SDave Chinner prev.br_startoff = start; 564030f712c9SDave Chinner } 564130f712c9SDave Chinner prev.br_state = XFS_EXT_UNWRITTEN; 564230f712c9SDave Chinner lastx--; 564330f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 564405a630d7SDarrick J. Wong ip, whichfork, &lastx, &cur, 564505a630d7SDarrick J. Wong &prev, firstblock, dfops, 564605a630d7SDarrick J. Wong &logflags); 564730f712c9SDave Chinner if (error) 564830f712c9SDave Chinner goto error0; 564930f712c9SDave Chinner goto nodelete; 565030f712c9SDave Chinner } else { 565130f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 565230f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 565330f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 565405a630d7SDarrick J. Wong ip, whichfork, &lastx, &cur, 565505a630d7SDarrick J. Wong &del, firstblock, dfops, 565605a630d7SDarrick J. Wong &logflags); 565730f712c9SDave Chinner if (error) 565830f712c9SDave Chinner goto error0; 565930f712c9SDave Chinner goto nodelete; 566030f712c9SDave Chinner } 566130f712c9SDave Chinner } 566230f712c9SDave Chinner 566330f712c9SDave Chinner /* 566430f712c9SDave Chinner * If it's the case where the directory code is running 566530f712c9SDave Chinner * with no block reservation, and the deleted block is in 566630f712c9SDave Chinner * the middle of its extent, and the resulting insert 566730f712c9SDave Chinner * of an extent would cause transformation to btree format, 566830f712c9SDave Chinner * then reject it. The calling code will then swap 566930f712c9SDave Chinner * blocks around instead. 567030f712c9SDave Chinner * We have to do this now, rather than waiting for the 567130f712c9SDave Chinner * conversion to btree format, since the transaction 567230f712c9SDave Chinner * will be dirty. 567330f712c9SDave Chinner */ 5674a7e5d03bSChristoph Hellwig if (!wasdel && tp->t_blk_res == 0 && 567530f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && 567630f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) >= /* Note the >= */ 567730f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork) && 567830f712c9SDave Chinner del.br_startoff > got.br_startoff && 567930f712c9SDave Chinner del.br_startoff + del.br_blockcount < 568030f712c9SDave Chinner got.br_startoff + got.br_blockcount) { 56812451337dSDave Chinner error = -ENOSPC; 568230f712c9SDave Chinner goto error0; 568330f712c9SDave Chinner } 5684b2706a05SBrian Foster 5685b2706a05SBrian Foster /* 5686b2706a05SBrian Foster * Unreserve quota and update realtime free space, if 5687b2706a05SBrian Foster * appropriate. If delayed allocation, update the inode delalloc 5688b2706a05SBrian Foster * counter now and wait to update the sb counters as 5689b2706a05SBrian Foster * xfs_bmap_del_extent() might need to borrow some blocks. 5690b2706a05SBrian Foster */ 5691b2706a05SBrian Foster if (wasdel) { 5692b2706a05SBrian Foster ASSERT(startblockval(del.br_startblock) > 0); 5693b2706a05SBrian Foster if (isrt) { 5694b2706a05SBrian Foster xfs_filblks_t rtexts; 5695b2706a05SBrian Foster 5696b2706a05SBrian Foster rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); 5697b2706a05SBrian Foster do_div(rtexts, mp->m_sb.sb_rextsize); 5698b2706a05SBrian Foster xfs_mod_frextents(mp, (int64_t)rtexts); 5699b2706a05SBrian Foster (void)xfs_trans_reserve_quota_nblks(NULL, 5700b2706a05SBrian Foster ip, -((long)del.br_blockcount), 0, 5701b2706a05SBrian Foster XFS_QMOPT_RES_RTBLKS); 5702b2706a05SBrian Foster } else { 5703b2706a05SBrian Foster (void)xfs_trans_reserve_quota_nblks(NULL, 5704b2706a05SBrian Foster ip, -((long)del.br_blockcount), 0, 5705b2706a05SBrian Foster XFS_QMOPT_RES_REGBLKS); 5706b2706a05SBrian Foster } 5707b2706a05SBrian Foster ip->i_delayed_blks -= del.br_blockcount; 5708b2706a05SBrian Foster if (cur) 5709b2706a05SBrian Foster cur->bc_private.b.flags |= 5710b2706a05SBrian Foster XFS_BTCUR_BPRV_WASDEL; 5711b2706a05SBrian Foster } else if (cur) 5712b2706a05SBrian Foster cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; 5713b2706a05SBrian Foster 57142c3234d1SDarrick J. Wong error = xfs_bmap_del_extent(ip, tp, &lastx, dfops, cur, &del, 57154847acf8SDarrick J. Wong &tmp_logflags, whichfork, flags); 571630f712c9SDave Chinner logflags |= tmp_logflags; 571730f712c9SDave Chinner if (error) 571830f712c9SDave Chinner goto error0; 5719b2706a05SBrian Foster 5720b2706a05SBrian Foster if (!isrt && wasdel) 5721b2706a05SBrian Foster xfs_mod_fdblocks(mp, (int64_t)del.br_blockcount, false); 5722b2706a05SBrian Foster 572330f712c9SDave Chinner bno = del.br_startoff - 1; 572430f712c9SDave Chinner nodelete: 572530f712c9SDave Chinner /* 572630f712c9SDave Chinner * If not done go on to the next (previous) record. 572730f712c9SDave Chinner */ 572830f712c9SDave Chinner if (bno != (xfs_fileoff_t)-1 && bno >= start) { 572930f712c9SDave Chinner if (lastx >= 0) { 57307efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 57317efc7945SChristoph Hellwig if (got.br_startoff > bno && --lastx >= 0) 57327efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 573330f712c9SDave Chinner } 573430f712c9SDave Chinner extno++; 573530f712c9SDave Chinner } 573630f712c9SDave Chinner } 57374453593bSDarrick J. Wong if (bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0) 57384453593bSDarrick J. Wong *rlen = 0; 57394453593bSDarrick J. Wong else 57404453593bSDarrick J. Wong *rlen = bno - start + 1; 574130f712c9SDave Chinner 574230f712c9SDave Chinner /* 574330f712c9SDave Chinner * Convert to a btree if necessary. 574430f712c9SDave Chinner */ 574530f712c9SDave Chinner if (xfs_bmap_needs_btree(ip, whichfork)) { 574630f712c9SDave Chinner ASSERT(cur == NULL); 57472c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, 574830f712c9SDave Chinner &cur, 0, &tmp_logflags, whichfork); 574930f712c9SDave Chinner logflags |= tmp_logflags; 575030f712c9SDave Chinner if (error) 575130f712c9SDave Chinner goto error0; 575230f712c9SDave Chinner } 575330f712c9SDave Chinner /* 575430f712c9SDave Chinner * transform from btree to extents, give it cur 575530f712c9SDave Chinner */ 575630f712c9SDave Chinner else if (xfs_bmap_wants_extents(ip, whichfork)) { 575730f712c9SDave Chinner ASSERT(cur != NULL); 575830f712c9SDave Chinner error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, 575930f712c9SDave Chinner whichfork); 576030f712c9SDave Chinner logflags |= tmp_logflags; 576130f712c9SDave Chinner if (error) 576230f712c9SDave Chinner goto error0; 576330f712c9SDave Chinner } 576430f712c9SDave Chinner /* 576530f712c9SDave Chinner * transform from extents to local? 576630f712c9SDave Chinner */ 576730f712c9SDave Chinner error = 0; 576830f712c9SDave Chinner error0: 576930f712c9SDave Chinner /* 577030f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 577130f712c9SDave Chinner * logging the extent records if we've converted to btree format. 577230f712c9SDave Chinner */ 577330f712c9SDave Chinner if ((logflags & xfs_ilog_fext(whichfork)) && 577430f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 577530f712c9SDave Chinner logflags &= ~xfs_ilog_fext(whichfork); 577630f712c9SDave Chinner else if ((logflags & xfs_ilog_fbroot(whichfork)) && 577730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) 577830f712c9SDave Chinner logflags &= ~xfs_ilog_fbroot(whichfork); 577930f712c9SDave Chinner /* 578030f712c9SDave Chinner * Log inode even in the error case, if the transaction 578130f712c9SDave Chinner * is dirty we'll need to shut down the filesystem. 578230f712c9SDave Chinner */ 578330f712c9SDave Chinner if (logflags) 578430f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 578530f712c9SDave Chinner if (cur) { 578630f712c9SDave Chinner if (!error) { 578730f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock; 578830f712c9SDave Chinner cur->bc_private.b.allocated = 0; 578930f712c9SDave Chinner } 579030f712c9SDave Chinner xfs_btree_del_cursor(cur, 579130f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 579230f712c9SDave Chinner } 579330f712c9SDave Chinner return error; 579430f712c9SDave Chinner } 579530f712c9SDave Chinner 57964453593bSDarrick J. Wong /* Unmap a range of a file. */ 57974453593bSDarrick J. Wong int 57984453593bSDarrick J. Wong xfs_bunmapi( 57994453593bSDarrick J. Wong xfs_trans_t *tp, 58004453593bSDarrick J. Wong struct xfs_inode *ip, 58014453593bSDarrick J. Wong xfs_fileoff_t bno, 58024453593bSDarrick J. Wong xfs_filblks_t len, 58034453593bSDarrick J. Wong int flags, 58044453593bSDarrick J. Wong xfs_extnum_t nexts, 58054453593bSDarrick J. Wong xfs_fsblock_t *firstblock, 58064453593bSDarrick J. Wong struct xfs_defer_ops *dfops, 58074453593bSDarrick J. Wong int *done) 58084453593bSDarrick J. Wong { 58094453593bSDarrick J. Wong int error; 58104453593bSDarrick J. Wong 58114453593bSDarrick J. Wong error = __xfs_bunmapi(tp, ip, bno, &len, flags, nexts, firstblock, 58124453593bSDarrick J. Wong dfops); 58134453593bSDarrick J. Wong *done = (len == 0); 58144453593bSDarrick J. Wong return error; 58154453593bSDarrick J. Wong } 58164453593bSDarrick J. Wong 581730f712c9SDave Chinner /* 5818ddb19e31SBrian Foster * Determine whether an extent shift can be accomplished by a merge with the 5819ddb19e31SBrian Foster * extent that precedes the target hole of the shift. 5820ddb19e31SBrian Foster */ 5821ddb19e31SBrian Foster STATIC bool 5822ddb19e31SBrian Foster xfs_bmse_can_merge( 5823ddb19e31SBrian Foster struct xfs_bmbt_irec *left, /* preceding extent */ 5824ddb19e31SBrian Foster struct xfs_bmbt_irec *got, /* current extent to shift */ 5825ddb19e31SBrian Foster xfs_fileoff_t shift) /* shift fsb */ 5826ddb19e31SBrian Foster { 5827ddb19e31SBrian Foster xfs_fileoff_t startoff; 5828ddb19e31SBrian Foster 5829ddb19e31SBrian Foster startoff = got->br_startoff - shift; 5830ddb19e31SBrian Foster 5831ddb19e31SBrian Foster /* 5832ddb19e31SBrian Foster * The extent, once shifted, must be adjacent in-file and on-disk with 5833ddb19e31SBrian Foster * the preceding extent. 5834ddb19e31SBrian Foster */ 5835ddb19e31SBrian Foster if ((left->br_startoff + left->br_blockcount != startoff) || 5836ddb19e31SBrian Foster (left->br_startblock + left->br_blockcount != got->br_startblock) || 5837ddb19e31SBrian Foster (left->br_state != got->br_state) || 5838ddb19e31SBrian Foster (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) 5839ddb19e31SBrian Foster return false; 5840ddb19e31SBrian Foster 5841ddb19e31SBrian Foster return true; 5842ddb19e31SBrian Foster } 5843ddb19e31SBrian Foster 5844ddb19e31SBrian Foster /* 5845ddb19e31SBrian Foster * A bmap extent shift adjusts the file offset of an extent to fill a preceding 5846ddb19e31SBrian Foster * hole in the file. If an extent shift would result in the extent being fully 5847ddb19e31SBrian Foster * adjacent to the extent that currently precedes the hole, we can merge with 5848ddb19e31SBrian Foster * the preceding extent rather than do the shift. 5849ddb19e31SBrian Foster * 5850ddb19e31SBrian Foster * This function assumes the caller has verified a shift-by-merge is possible 5851ddb19e31SBrian Foster * with the provided extents via xfs_bmse_can_merge(). 5852ddb19e31SBrian Foster */ 5853ddb19e31SBrian Foster STATIC int 5854ddb19e31SBrian Foster xfs_bmse_merge( 5855ddb19e31SBrian Foster struct xfs_inode *ip, 5856ddb19e31SBrian Foster int whichfork, 5857ddb19e31SBrian Foster xfs_fileoff_t shift, /* shift fsb */ 5858ddb19e31SBrian Foster int current_ext, /* idx of gotp */ 5859ddb19e31SBrian Foster struct xfs_bmbt_rec_host *gotp, /* extent to shift */ 5860ddb19e31SBrian Foster struct xfs_bmbt_rec_host *leftp, /* preceding extent */ 5861ddb19e31SBrian Foster struct xfs_btree_cur *cur, 5862ddb19e31SBrian Foster int *logflags) /* output */ 5863ddb19e31SBrian Foster { 5864ddb19e31SBrian Foster struct xfs_bmbt_irec got; 5865ddb19e31SBrian Foster struct xfs_bmbt_irec left; 5866ddb19e31SBrian Foster xfs_filblks_t blockcount; 5867ddb19e31SBrian Foster int error, i; 58685fb5aeeeSEric Sandeen struct xfs_mount *mp = ip->i_mount; 5869ddb19e31SBrian Foster 5870ddb19e31SBrian Foster xfs_bmbt_get_all(gotp, &got); 5871ddb19e31SBrian Foster xfs_bmbt_get_all(leftp, &left); 5872ddb19e31SBrian Foster blockcount = left.br_blockcount + got.br_blockcount; 5873ddb19e31SBrian Foster 5874ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 5875ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 5876ddb19e31SBrian Foster ASSERT(xfs_bmse_can_merge(&left, &got, shift)); 5877ddb19e31SBrian Foster 5878ddb19e31SBrian Foster /* 5879ddb19e31SBrian Foster * Merge the in-core extents. Note that the host record pointers and 5880ddb19e31SBrian Foster * current_ext index are invalid once the extent has been removed via 5881ddb19e31SBrian Foster * xfs_iext_remove(). 5882ddb19e31SBrian Foster */ 5883ddb19e31SBrian Foster xfs_bmbt_set_blockcount(leftp, blockcount); 5884ddb19e31SBrian Foster xfs_iext_remove(ip, current_ext, 1, 0); 5885ddb19e31SBrian Foster 5886ddb19e31SBrian Foster /* 5887ddb19e31SBrian Foster * Update the on-disk extent count, the btree if necessary and log the 5888ddb19e31SBrian Foster * inode. 5889ddb19e31SBrian Foster */ 5890ddb19e31SBrian Foster XFS_IFORK_NEXT_SET(ip, whichfork, 5891ddb19e31SBrian Foster XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 5892ddb19e31SBrian Foster *logflags |= XFS_ILOG_CORE; 5893ddb19e31SBrian Foster if (!cur) { 5894ddb19e31SBrian Foster *logflags |= XFS_ILOG_DEXT; 5895ddb19e31SBrian Foster return 0; 5896ddb19e31SBrian Foster } 5897ddb19e31SBrian Foster 5898ddb19e31SBrian Foster /* lookup and remove the extent to merge */ 5899ddb19e31SBrian Foster error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, 5900ddb19e31SBrian Foster got.br_blockcount, &i); 5901ddb19e31SBrian Foster if (error) 59024db431f5SDave Chinner return error; 59035fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5904ddb19e31SBrian Foster 5905ddb19e31SBrian Foster error = xfs_btree_delete(cur, &i); 5906ddb19e31SBrian Foster if (error) 59074db431f5SDave Chinner return error; 59085fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5909ddb19e31SBrian Foster 5910ddb19e31SBrian Foster /* lookup and update size of the previous extent */ 5911ddb19e31SBrian Foster error = xfs_bmbt_lookup_eq(cur, left.br_startoff, left.br_startblock, 5912ddb19e31SBrian Foster left.br_blockcount, &i); 5913ddb19e31SBrian Foster if (error) 59144db431f5SDave Chinner return error; 59155fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5916ddb19e31SBrian Foster 5917ddb19e31SBrian Foster left.br_blockcount = blockcount; 5918ddb19e31SBrian Foster 59194db431f5SDave Chinner return xfs_bmbt_update(cur, left.br_startoff, left.br_startblock, 5920ddb19e31SBrian Foster left.br_blockcount, left.br_state); 5921ddb19e31SBrian Foster } 5922ddb19e31SBrian Foster 5923ddb19e31SBrian Foster /* 5924a979bdfeSBrian Foster * Shift a single extent. 5925a979bdfeSBrian Foster */ 5926a979bdfeSBrian Foster STATIC int 5927a979bdfeSBrian Foster xfs_bmse_shift_one( 5928a979bdfeSBrian Foster struct xfs_inode *ip, 5929a979bdfeSBrian Foster int whichfork, 5930a979bdfeSBrian Foster xfs_fileoff_t offset_shift_fsb, 5931a979bdfeSBrian Foster int *current_ext, 5932a979bdfeSBrian Foster struct xfs_bmbt_rec_host *gotp, 5933a979bdfeSBrian Foster struct xfs_btree_cur *cur, 5934a904b1caSNamjae Jeon int *logflags, 59359c194644SDarrick J. Wong enum shift_direction direction, 59369c194644SDarrick J. Wong struct xfs_defer_ops *dfops) 5937a979bdfeSBrian Foster { 5938a979bdfeSBrian Foster struct xfs_ifork *ifp; 59395fb5aeeeSEric Sandeen struct xfs_mount *mp; 5940a979bdfeSBrian Foster xfs_fileoff_t startoff; 5941a904b1caSNamjae Jeon struct xfs_bmbt_rec_host *adj_irecp; 5942a979bdfeSBrian Foster struct xfs_bmbt_irec got; 5943a904b1caSNamjae Jeon struct xfs_bmbt_irec adj_irec; 5944a979bdfeSBrian Foster int error; 5945a979bdfeSBrian Foster int i; 5946a904b1caSNamjae Jeon int total_extents; 5947a979bdfeSBrian Foster 59485fb5aeeeSEric Sandeen mp = ip->i_mount; 5949a979bdfeSBrian Foster ifp = XFS_IFORK_PTR(ip, whichfork); 59505d829300SEric Sandeen total_extents = xfs_iext_count(ifp); 5951a979bdfeSBrian Foster 5952a979bdfeSBrian Foster xfs_bmbt_get_all(gotp, &got); 5953a979bdfeSBrian Foster 5954f71721d0SBrian Foster /* delalloc extents should be prevented by caller */ 59555fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got.br_startblock)); 5956f71721d0SBrian Foster 5957a904b1caSNamjae Jeon if (direction == SHIFT_LEFT) { 5958a904b1caSNamjae Jeon startoff = got.br_startoff - offset_shift_fsb; 5959a979bdfeSBrian Foster 5960a904b1caSNamjae Jeon /* 5961a904b1caSNamjae Jeon * Check for merge if we've got an extent to the left, 5962a904b1caSNamjae Jeon * otherwise make sure there's enough room at the start 5963a904b1caSNamjae Jeon * of the file for the shift. 5964a904b1caSNamjae Jeon */ 5965a904b1caSNamjae Jeon if (!*current_ext) { 5966a904b1caSNamjae Jeon if (got.br_startoff < offset_shift_fsb) 5967a904b1caSNamjae Jeon return -EINVAL; 5968a904b1caSNamjae Jeon goto update_current_ext; 5969a904b1caSNamjae Jeon } 5970a904b1caSNamjae Jeon /* 5971a904b1caSNamjae Jeon * grab the left extent and check for a large 5972a904b1caSNamjae Jeon * enough hole. 5973a904b1caSNamjae Jeon */ 5974a904b1caSNamjae Jeon adj_irecp = xfs_iext_get_ext(ifp, *current_ext - 1); 5975a904b1caSNamjae Jeon xfs_bmbt_get_all(adj_irecp, &adj_irec); 5976a904b1caSNamjae Jeon 5977a904b1caSNamjae Jeon if (startoff < 5978a904b1caSNamjae Jeon adj_irec.br_startoff + adj_irec.br_blockcount) 5979a979bdfeSBrian Foster return -EINVAL; 5980a979bdfeSBrian Foster 5981a979bdfeSBrian Foster /* check whether to merge the extent or shift it down */ 5982a904b1caSNamjae Jeon if (xfs_bmse_can_merge(&adj_irec, &got, 5983a904b1caSNamjae Jeon offset_shift_fsb)) { 59849c194644SDarrick J. Wong error = xfs_bmse_merge(ip, whichfork, offset_shift_fsb, 5985a904b1caSNamjae Jeon *current_ext, gotp, adj_irecp, 5986a904b1caSNamjae Jeon cur, logflags); 59879c194644SDarrick J. Wong if (error) 59889c194644SDarrick J. Wong return error; 59899c194644SDarrick J. Wong adj_irec = got; 59909c194644SDarrick J. Wong goto update_rmap; 5991b11bd671SDave Chinner } 5992a904b1caSNamjae Jeon } else { 5993a904b1caSNamjae Jeon startoff = got.br_startoff + offset_shift_fsb; 5994a904b1caSNamjae Jeon /* nothing to move if this is the last extent */ 5995a904b1caSNamjae Jeon if (*current_ext >= (total_extents - 1)) 5996a904b1caSNamjae Jeon goto update_current_ext; 5997a904b1caSNamjae Jeon /* 5998a904b1caSNamjae Jeon * If this is not the last extent in the file, make sure there 5999a904b1caSNamjae Jeon * is enough room between current extent and next extent for 6000a904b1caSNamjae Jeon * accommodating the shift. 6001a904b1caSNamjae Jeon */ 6002a904b1caSNamjae Jeon adj_irecp = xfs_iext_get_ext(ifp, *current_ext + 1); 6003a904b1caSNamjae Jeon xfs_bmbt_get_all(adj_irecp, &adj_irec); 6004a904b1caSNamjae Jeon if (startoff + got.br_blockcount > adj_irec.br_startoff) 6005b11bd671SDave Chinner return -EINVAL; 6006a904b1caSNamjae Jeon /* 6007a904b1caSNamjae Jeon * Unlike a left shift (which involves a hole punch), 6008a904b1caSNamjae Jeon * a right shift does not modify extent neighbors 6009a904b1caSNamjae Jeon * in any way. We should never find mergeable extents 6010a904b1caSNamjae Jeon * in this scenario. Check anyways and warn if we 6011a904b1caSNamjae Jeon * encounter two extents that could be one. 6012a904b1caSNamjae Jeon */ 6013a904b1caSNamjae Jeon if (xfs_bmse_can_merge(&got, &adj_irec, offset_shift_fsb)) 6014a904b1caSNamjae Jeon WARN_ON_ONCE(1); 6015a904b1caSNamjae Jeon } 6016a979bdfeSBrian Foster /* 6017a979bdfeSBrian Foster * Increment the extent index for the next iteration, update the start 6018a979bdfeSBrian Foster * offset of the in-core extent and update the btree if applicable. 6019a979bdfeSBrian Foster */ 6020a904b1caSNamjae Jeon update_current_ext: 6021a904b1caSNamjae Jeon if (direction == SHIFT_LEFT) 6022a979bdfeSBrian Foster (*current_ext)++; 6023a904b1caSNamjae Jeon else 6024a904b1caSNamjae Jeon (*current_ext)--; 6025a979bdfeSBrian Foster xfs_bmbt_set_startoff(gotp, startoff); 6026a979bdfeSBrian Foster *logflags |= XFS_ILOG_CORE; 60279c194644SDarrick J. Wong adj_irec = got; 6028a979bdfeSBrian Foster if (!cur) { 6029a979bdfeSBrian Foster *logflags |= XFS_ILOG_DEXT; 60309c194644SDarrick J. Wong goto update_rmap; 6031a979bdfeSBrian Foster } 6032a979bdfeSBrian Foster 6033a979bdfeSBrian Foster error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, 6034a979bdfeSBrian Foster got.br_blockcount, &i); 6035a979bdfeSBrian Foster if (error) 6036a979bdfeSBrian Foster return error; 60375fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 6038a979bdfeSBrian Foster 6039a979bdfeSBrian Foster got.br_startoff = startoff; 60409c194644SDarrick J. Wong error = xfs_bmbt_update(cur, got.br_startoff, got.br_startblock, 6041a979bdfeSBrian Foster got.br_blockcount, got.br_state); 60429c194644SDarrick J. Wong if (error) 60439c194644SDarrick J. Wong return error; 60449c194644SDarrick J. Wong 60459c194644SDarrick J. Wong update_rmap: 60469c194644SDarrick J. Wong /* update reverse mapping */ 60479c194644SDarrick J. Wong error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, &adj_irec); 60489c194644SDarrick J. Wong if (error) 60499c194644SDarrick J. Wong return error; 60509c194644SDarrick J. Wong adj_irec.br_startoff = startoff; 60519c194644SDarrick J. Wong return xfs_rmap_map_extent(mp, dfops, ip, whichfork, &adj_irec); 6052a979bdfeSBrian Foster } 6053a979bdfeSBrian Foster 6054a979bdfeSBrian Foster /* 6055a904b1caSNamjae Jeon * Shift extent records to the left/right to cover/create a hole. 605630f712c9SDave Chinner * 60572c845f5aSBrian Foster * The maximum number of extents to be shifted in a single operation is 6058a904b1caSNamjae Jeon * @num_exts. @stop_fsb specifies the file offset at which to stop shift and the 60592c845f5aSBrian Foster * file offset where we've left off is returned in @next_fsb. @offset_shift_fsb 60602c845f5aSBrian Foster * is the length by which each extent is shifted. If there is no hole to shift 60612c845f5aSBrian Foster * the extents into, this will be considered invalid operation and we abort 60622c845f5aSBrian Foster * immediately. 606330f712c9SDave Chinner */ 606430f712c9SDave Chinner int 606530f712c9SDave Chinner xfs_bmap_shift_extents( 606630f712c9SDave Chinner struct xfs_trans *tp, 606730f712c9SDave Chinner struct xfs_inode *ip, 6068a904b1caSNamjae Jeon xfs_fileoff_t *next_fsb, 606930f712c9SDave Chinner xfs_fileoff_t offset_shift_fsb, 60702c845f5aSBrian Foster int *done, 6071a904b1caSNamjae Jeon xfs_fileoff_t stop_fsb, 607230f712c9SDave Chinner xfs_fsblock_t *firstblock, 60732c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, 6074a904b1caSNamjae Jeon enum shift_direction direction, 607530f712c9SDave Chinner int num_exts) 607630f712c9SDave Chinner { 6077ca446d88SBrian Foster struct xfs_btree_cur *cur = NULL; 607830f712c9SDave Chinner struct xfs_bmbt_rec_host *gotp; 607930f712c9SDave Chinner struct xfs_bmbt_irec got; 608030f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 608130f712c9SDave Chinner struct xfs_ifork *ifp; 608230f712c9SDave Chinner xfs_extnum_t nexts = 0; 60832c845f5aSBrian Foster xfs_extnum_t current_ext; 6084a904b1caSNamjae Jeon xfs_extnum_t total_extents; 6085a904b1caSNamjae Jeon xfs_extnum_t stop_extent; 608630f712c9SDave Chinner int error = 0; 608730f712c9SDave Chinner int whichfork = XFS_DATA_FORK; 6088ca446d88SBrian Foster int logflags = 0; 608930f712c9SDave Chinner 609030f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 609130f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 609230f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 609330f712c9SDave Chinner mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { 609430f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmap_shift_extents", 609530f712c9SDave Chinner XFS_ERRLEVEL_LOW, mp); 60962451337dSDave Chinner return -EFSCORRUPTED; 609730f712c9SDave Chinner } 609830f712c9SDave Chinner 609930f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 61002451337dSDave Chinner return -EIO; 610130f712c9SDave Chinner 61022c845f5aSBrian Foster ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 61032c845f5aSBrian Foster ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 6104a904b1caSNamjae Jeon ASSERT(direction == SHIFT_LEFT || direction == SHIFT_RIGHT); 6105a904b1caSNamjae Jeon ASSERT(*next_fsb != NULLFSBLOCK || direction == SHIFT_RIGHT); 610630f712c9SDave Chinner 610730f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 610830f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 610930f712c9SDave Chinner /* Read in all the extents */ 611030f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 611130f712c9SDave Chinner if (error) 611230f712c9SDave Chinner return error; 611330f712c9SDave Chinner } 611430f712c9SDave Chinner 6115ddb19e31SBrian Foster if (ifp->if_flags & XFS_IFBROOT) { 6116ddb19e31SBrian Foster cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 6117ddb19e31SBrian Foster cur->bc_private.b.firstblock = *firstblock; 61182c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 6119ddb19e31SBrian Foster cur->bc_private.b.flags = 0; 6120ddb19e31SBrian Foster } 6121ddb19e31SBrian Foster 612230f712c9SDave Chinner /* 612330f712c9SDave Chinner * There may be delalloc extents in the data fork before the range we 61242c845f5aSBrian Foster * are collapsing out, so we cannot use the count of real extents here. 61252c845f5aSBrian Foster * Instead we have to calculate it from the incore fork. 612630f712c9SDave Chinner */ 61275d829300SEric Sandeen total_extents = xfs_iext_count(ifp); 6128a904b1caSNamjae Jeon if (total_extents == 0) { 6129a904b1caSNamjae Jeon *done = 1; 6130a904b1caSNamjae Jeon goto del_cursor; 6131a904b1caSNamjae Jeon } 6132a904b1caSNamjae Jeon 6133a904b1caSNamjae Jeon /* 6134a904b1caSNamjae Jeon * In case of first right shift, we need to initialize next_fsb 6135a904b1caSNamjae Jeon */ 6136a904b1caSNamjae Jeon if (*next_fsb == NULLFSBLOCK) { 6137a904b1caSNamjae Jeon gotp = xfs_iext_get_ext(ifp, total_extents - 1); 6138a904b1caSNamjae Jeon xfs_bmbt_get_all(gotp, &got); 6139a904b1caSNamjae Jeon *next_fsb = got.br_startoff; 6140a904b1caSNamjae Jeon if (stop_fsb > *next_fsb) { 6141a904b1caSNamjae Jeon *done = 1; 6142a904b1caSNamjae Jeon goto del_cursor; 6143a904b1caSNamjae Jeon } 6144a904b1caSNamjae Jeon } 6145a904b1caSNamjae Jeon 6146a904b1caSNamjae Jeon /* Lookup the extent index at which we have to stop */ 6147a904b1caSNamjae Jeon if (direction == SHIFT_RIGHT) { 6148a904b1caSNamjae Jeon gotp = xfs_iext_bno_to_ext(ifp, stop_fsb, &stop_extent); 6149a904b1caSNamjae Jeon /* Make stop_extent exclusive of shift range */ 6150a904b1caSNamjae Jeon stop_extent--; 6151a904b1caSNamjae Jeon } else 6152a904b1caSNamjae Jeon stop_extent = total_extents; 6153a904b1caSNamjae Jeon 6154a904b1caSNamjae Jeon /* 6155a904b1caSNamjae Jeon * Look up the extent index for the fsb where we start shifting. We can 6156a904b1caSNamjae Jeon * henceforth iterate with current_ext as extent list changes are locked 6157a904b1caSNamjae Jeon * out via ilock. 6158a904b1caSNamjae Jeon * 6159a904b1caSNamjae Jeon * gotp can be null in 2 cases: 1) if there are no extents or 2) 6160a904b1caSNamjae Jeon * *next_fsb lies in a hole beyond which there are no extents. Either 6161a904b1caSNamjae Jeon * way, we are done. 6162a904b1caSNamjae Jeon */ 6163a904b1caSNamjae Jeon gotp = xfs_iext_bno_to_ext(ifp, *next_fsb, ¤t_ext); 6164a904b1caSNamjae Jeon if (!gotp) { 6165a904b1caSNamjae Jeon *done = 1; 6166a904b1caSNamjae Jeon goto del_cursor; 6167a904b1caSNamjae Jeon } 6168a904b1caSNamjae Jeon 6169a904b1caSNamjae Jeon /* some sanity checking before we finally start shifting extents */ 6170a904b1caSNamjae Jeon if ((direction == SHIFT_LEFT && current_ext >= stop_extent) || 6171a904b1caSNamjae Jeon (direction == SHIFT_RIGHT && current_ext <= stop_extent)) { 6172a904b1caSNamjae Jeon error = -EIO; 6173a904b1caSNamjae Jeon goto del_cursor; 6174a904b1caSNamjae Jeon } 6175a904b1caSNamjae Jeon 6176a904b1caSNamjae Jeon while (nexts++ < num_exts) { 6177a979bdfeSBrian Foster error = xfs_bmse_shift_one(ip, whichfork, offset_shift_fsb, 6178a904b1caSNamjae Jeon ¤t_ext, gotp, cur, &logflags, 61799c194644SDarrick J. Wong direction, dfops); 6180ddb19e31SBrian Foster if (error) 6181ddb19e31SBrian Foster goto del_cursor; 6182a904b1caSNamjae Jeon /* 6183a904b1caSNamjae Jeon * If there was an extent merge during the shift, the extent 6184a904b1caSNamjae Jeon * count can change. Update the total and grade the next record. 6185a904b1caSNamjae Jeon */ 6186a904b1caSNamjae Jeon if (direction == SHIFT_LEFT) { 61875d829300SEric Sandeen total_extents = xfs_iext_count(ifp); 6188a904b1caSNamjae Jeon stop_extent = total_extents; 6189a904b1caSNamjae Jeon } 6190a904b1caSNamjae Jeon 6191a904b1caSNamjae Jeon if (current_ext == stop_extent) { 6192a904b1caSNamjae Jeon *done = 1; 6193a904b1caSNamjae Jeon *next_fsb = NULLFSBLOCK; 6194ddb19e31SBrian Foster break; 6195a904b1caSNamjae Jeon } 6196ddb19e31SBrian Foster gotp = xfs_iext_get_ext(ifp, current_ext); 619730f712c9SDave Chinner } 619830f712c9SDave Chinner 6199a904b1caSNamjae Jeon if (!*done) { 6200a979bdfeSBrian Foster xfs_bmbt_get_all(gotp, &got); 62012c845f5aSBrian Foster *next_fsb = got.br_startoff; 6202a979bdfeSBrian Foster } 620330f712c9SDave Chinner 620430f712c9SDave Chinner del_cursor: 620530f712c9SDave Chinner if (cur) 620630f712c9SDave Chinner xfs_btree_del_cursor(cur, 620730f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 620830f712c9SDave Chinner 6209ca446d88SBrian Foster if (logflags) 621030f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 62112c845f5aSBrian Foster 621230f712c9SDave Chinner return error; 621330f712c9SDave Chinner } 6214a904b1caSNamjae Jeon 6215a904b1caSNamjae Jeon /* 6216a904b1caSNamjae Jeon * Splits an extent into two extents at split_fsb block such that it is 6217a904b1caSNamjae Jeon * the first block of the current_ext. @current_ext is a target extent 6218a904b1caSNamjae Jeon * to be split. @split_fsb is a block where the extents is split. 6219a904b1caSNamjae Jeon * If split_fsb lies in a hole or the first block of extents, just return 0. 6220a904b1caSNamjae Jeon */ 6221a904b1caSNamjae Jeon STATIC int 6222a904b1caSNamjae Jeon xfs_bmap_split_extent_at( 6223a904b1caSNamjae Jeon struct xfs_trans *tp, 6224a904b1caSNamjae Jeon struct xfs_inode *ip, 6225a904b1caSNamjae Jeon xfs_fileoff_t split_fsb, 6226a904b1caSNamjae Jeon xfs_fsblock_t *firstfsb, 62272c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops) 6228a904b1caSNamjae Jeon { 6229a904b1caSNamjae Jeon int whichfork = XFS_DATA_FORK; 6230a904b1caSNamjae Jeon struct xfs_btree_cur *cur = NULL; 6231a904b1caSNamjae Jeon struct xfs_bmbt_rec_host *gotp; 6232a904b1caSNamjae Jeon struct xfs_bmbt_irec got; 6233a904b1caSNamjae Jeon struct xfs_bmbt_irec new; /* split extent */ 6234a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 6235a904b1caSNamjae Jeon struct xfs_ifork *ifp; 6236a904b1caSNamjae Jeon xfs_fsblock_t gotblkcnt; /* new block count for got */ 6237a904b1caSNamjae Jeon xfs_extnum_t current_ext; 6238a904b1caSNamjae Jeon int error = 0; 6239a904b1caSNamjae Jeon int logflags = 0; 6240a904b1caSNamjae Jeon int i = 0; 6241a904b1caSNamjae Jeon 6242a904b1caSNamjae Jeon if (unlikely(XFS_TEST_ERROR( 6243a904b1caSNamjae Jeon (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 6244a904b1caSNamjae Jeon XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 6245a904b1caSNamjae Jeon mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { 6246a904b1caSNamjae Jeon XFS_ERROR_REPORT("xfs_bmap_split_extent_at", 6247a904b1caSNamjae Jeon XFS_ERRLEVEL_LOW, mp); 6248a904b1caSNamjae Jeon return -EFSCORRUPTED; 6249a904b1caSNamjae Jeon } 6250a904b1caSNamjae Jeon 6251a904b1caSNamjae Jeon if (XFS_FORCED_SHUTDOWN(mp)) 6252a904b1caSNamjae Jeon return -EIO; 6253a904b1caSNamjae Jeon 6254a904b1caSNamjae Jeon ifp = XFS_IFORK_PTR(ip, whichfork); 6255a904b1caSNamjae Jeon if (!(ifp->if_flags & XFS_IFEXTENTS)) { 6256a904b1caSNamjae Jeon /* Read in all the extents */ 6257a904b1caSNamjae Jeon error = xfs_iread_extents(tp, ip, whichfork); 6258a904b1caSNamjae Jeon if (error) 6259a904b1caSNamjae Jeon return error; 6260a904b1caSNamjae Jeon } 6261a904b1caSNamjae Jeon 6262a904b1caSNamjae Jeon /* 6263a904b1caSNamjae Jeon * gotp can be null in 2 cases: 1) if there are no extents 6264a904b1caSNamjae Jeon * or 2) split_fsb lies in a hole beyond which there are 6265a904b1caSNamjae Jeon * no extents. Either way, we are done. 6266a904b1caSNamjae Jeon */ 6267a904b1caSNamjae Jeon gotp = xfs_iext_bno_to_ext(ifp, split_fsb, ¤t_ext); 6268a904b1caSNamjae Jeon if (!gotp) 6269a904b1caSNamjae Jeon return 0; 6270a904b1caSNamjae Jeon 6271a904b1caSNamjae Jeon xfs_bmbt_get_all(gotp, &got); 6272a904b1caSNamjae Jeon 6273a904b1caSNamjae Jeon /* 6274a904b1caSNamjae Jeon * Check split_fsb lies in a hole or the start boundary offset 6275a904b1caSNamjae Jeon * of the extent. 6276a904b1caSNamjae Jeon */ 6277a904b1caSNamjae Jeon if (got.br_startoff >= split_fsb) 6278a904b1caSNamjae Jeon return 0; 6279a904b1caSNamjae Jeon 6280a904b1caSNamjae Jeon gotblkcnt = split_fsb - got.br_startoff; 6281a904b1caSNamjae Jeon new.br_startoff = split_fsb; 6282a904b1caSNamjae Jeon new.br_startblock = got.br_startblock + gotblkcnt; 6283a904b1caSNamjae Jeon new.br_blockcount = got.br_blockcount - gotblkcnt; 6284a904b1caSNamjae Jeon new.br_state = got.br_state; 6285a904b1caSNamjae Jeon 6286a904b1caSNamjae Jeon if (ifp->if_flags & XFS_IFBROOT) { 6287a904b1caSNamjae Jeon cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 6288a904b1caSNamjae Jeon cur->bc_private.b.firstblock = *firstfsb; 62892c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 6290a904b1caSNamjae Jeon cur->bc_private.b.flags = 0; 6291a904b1caSNamjae Jeon error = xfs_bmbt_lookup_eq(cur, got.br_startoff, 6292a904b1caSNamjae Jeon got.br_startblock, 6293a904b1caSNamjae Jeon got.br_blockcount, 6294a904b1caSNamjae Jeon &i); 6295a904b1caSNamjae Jeon if (error) 6296a904b1caSNamjae Jeon goto del_cursor; 6297a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); 6298a904b1caSNamjae Jeon } 6299a904b1caSNamjae Jeon 6300a904b1caSNamjae Jeon xfs_bmbt_set_blockcount(gotp, gotblkcnt); 6301a904b1caSNamjae Jeon got.br_blockcount = gotblkcnt; 6302a904b1caSNamjae Jeon 6303a904b1caSNamjae Jeon logflags = XFS_ILOG_CORE; 6304a904b1caSNamjae Jeon if (cur) { 6305a904b1caSNamjae Jeon error = xfs_bmbt_update(cur, got.br_startoff, 6306a904b1caSNamjae Jeon got.br_startblock, 6307a904b1caSNamjae Jeon got.br_blockcount, 6308a904b1caSNamjae Jeon got.br_state); 6309a904b1caSNamjae Jeon if (error) 6310a904b1caSNamjae Jeon goto del_cursor; 6311a904b1caSNamjae Jeon } else 6312a904b1caSNamjae Jeon logflags |= XFS_ILOG_DEXT; 6313a904b1caSNamjae Jeon 6314a904b1caSNamjae Jeon /* Add new extent */ 6315a904b1caSNamjae Jeon current_ext++; 6316a904b1caSNamjae Jeon xfs_iext_insert(ip, current_ext, 1, &new, 0); 6317a904b1caSNamjae Jeon XFS_IFORK_NEXT_SET(ip, whichfork, 6318a904b1caSNamjae Jeon XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 6319a904b1caSNamjae Jeon 6320a904b1caSNamjae Jeon if (cur) { 6321a904b1caSNamjae Jeon error = xfs_bmbt_lookup_eq(cur, new.br_startoff, 6322a904b1caSNamjae Jeon new.br_startblock, new.br_blockcount, 6323a904b1caSNamjae Jeon &i); 6324a904b1caSNamjae Jeon if (error) 6325a904b1caSNamjae Jeon goto del_cursor; 6326a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 0, del_cursor); 6327a904b1caSNamjae Jeon cur->bc_rec.b.br_state = new.br_state; 6328a904b1caSNamjae Jeon 6329a904b1caSNamjae Jeon error = xfs_btree_insert(cur, &i); 6330a904b1caSNamjae Jeon if (error) 6331a904b1caSNamjae Jeon goto del_cursor; 6332a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); 6333a904b1caSNamjae Jeon } 6334a904b1caSNamjae Jeon 6335a904b1caSNamjae Jeon /* 6336a904b1caSNamjae Jeon * Convert to a btree if necessary. 6337a904b1caSNamjae Jeon */ 6338a904b1caSNamjae Jeon if (xfs_bmap_needs_btree(ip, whichfork)) { 6339a904b1caSNamjae Jeon int tmp_logflags; /* partial log flag return val */ 6340a904b1caSNamjae Jeon 6341a904b1caSNamjae Jeon ASSERT(cur == NULL); 63422c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstfsb, dfops, 6343a904b1caSNamjae Jeon &cur, 0, &tmp_logflags, whichfork); 6344a904b1caSNamjae Jeon logflags |= tmp_logflags; 6345a904b1caSNamjae Jeon } 6346a904b1caSNamjae Jeon 6347a904b1caSNamjae Jeon del_cursor: 6348a904b1caSNamjae Jeon if (cur) { 6349a904b1caSNamjae Jeon cur->bc_private.b.allocated = 0; 6350a904b1caSNamjae Jeon xfs_btree_del_cursor(cur, 6351a904b1caSNamjae Jeon error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 6352a904b1caSNamjae Jeon } 6353a904b1caSNamjae Jeon 6354a904b1caSNamjae Jeon if (logflags) 6355a904b1caSNamjae Jeon xfs_trans_log_inode(tp, ip, logflags); 6356a904b1caSNamjae Jeon return error; 6357a904b1caSNamjae Jeon } 6358a904b1caSNamjae Jeon 6359a904b1caSNamjae Jeon int 6360a904b1caSNamjae Jeon xfs_bmap_split_extent( 6361a904b1caSNamjae Jeon struct xfs_inode *ip, 6362a904b1caSNamjae Jeon xfs_fileoff_t split_fsb) 6363a904b1caSNamjae Jeon { 6364a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 6365a904b1caSNamjae Jeon struct xfs_trans *tp; 63662c3234d1SDarrick J. Wong struct xfs_defer_ops dfops; 6367a904b1caSNamjae Jeon xfs_fsblock_t firstfsb; 6368a904b1caSNamjae Jeon int error; 6369a904b1caSNamjae Jeon 6370253f4911SChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 6371253f4911SChristoph Hellwig XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp); 6372253f4911SChristoph Hellwig if (error) 6373a904b1caSNamjae Jeon return error; 6374a904b1caSNamjae Jeon 6375a904b1caSNamjae Jeon xfs_ilock(ip, XFS_ILOCK_EXCL); 6376a904b1caSNamjae Jeon xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 6377a904b1caSNamjae Jeon 63782c3234d1SDarrick J. Wong xfs_defer_init(&dfops, &firstfsb); 6379a904b1caSNamjae Jeon 6380a904b1caSNamjae Jeon error = xfs_bmap_split_extent_at(tp, ip, split_fsb, 63812c3234d1SDarrick J. Wong &firstfsb, &dfops); 6382a904b1caSNamjae Jeon if (error) 6383a904b1caSNamjae Jeon goto out; 6384a904b1caSNamjae Jeon 63852c3234d1SDarrick J. Wong error = xfs_defer_finish(&tp, &dfops, NULL); 6386a904b1caSNamjae Jeon if (error) 6387a904b1caSNamjae Jeon goto out; 6388a904b1caSNamjae Jeon 638970393313SChristoph Hellwig return xfs_trans_commit(tp); 6390a904b1caSNamjae Jeon 6391a904b1caSNamjae Jeon out: 63922c3234d1SDarrick J. Wong xfs_defer_cancel(&dfops); 63934906e215SChristoph Hellwig xfs_trans_cancel(tp); 6394a904b1caSNamjae Jeon return error; 6395a904b1caSNamjae Jeon } 63969f3afb57SDarrick J. Wong 63979f3afb57SDarrick J. Wong /* Deferred mapping is only for real extents in the data fork. */ 63989f3afb57SDarrick J. Wong static bool 63999f3afb57SDarrick J. Wong xfs_bmap_is_update_needed( 64009f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 64019f3afb57SDarrick J. Wong { 64029f3afb57SDarrick J. Wong return bmap->br_startblock != HOLESTARTBLOCK && 64039f3afb57SDarrick J. Wong bmap->br_startblock != DELAYSTARTBLOCK; 64049f3afb57SDarrick J. Wong } 64059f3afb57SDarrick J. Wong 64069f3afb57SDarrick J. Wong /* Record a bmap intent. */ 64079f3afb57SDarrick J. Wong static int 64089f3afb57SDarrick J. Wong __xfs_bmap_add( 64099f3afb57SDarrick J. Wong struct xfs_mount *mp, 64109f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 64119f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 64129f3afb57SDarrick J. Wong struct xfs_inode *ip, 64139f3afb57SDarrick J. Wong int whichfork, 64149f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 64159f3afb57SDarrick J. Wong { 64169f3afb57SDarrick J. Wong int error; 64179f3afb57SDarrick J. Wong struct xfs_bmap_intent *bi; 64189f3afb57SDarrick J. Wong 64199f3afb57SDarrick J. Wong trace_xfs_bmap_defer(mp, 64209f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(mp, bmap->br_startblock), 64219f3afb57SDarrick J. Wong type, 64229f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(mp, bmap->br_startblock), 64239f3afb57SDarrick J. Wong ip->i_ino, whichfork, 64249f3afb57SDarrick J. Wong bmap->br_startoff, 64259f3afb57SDarrick J. Wong bmap->br_blockcount, 64269f3afb57SDarrick J. Wong bmap->br_state); 64279f3afb57SDarrick J. Wong 64289f3afb57SDarrick J. Wong bi = kmem_alloc(sizeof(struct xfs_bmap_intent), KM_SLEEP | KM_NOFS); 64299f3afb57SDarrick J. Wong INIT_LIST_HEAD(&bi->bi_list); 64309f3afb57SDarrick J. Wong bi->bi_type = type; 64319f3afb57SDarrick J. Wong bi->bi_owner = ip; 64329f3afb57SDarrick J. Wong bi->bi_whichfork = whichfork; 64339f3afb57SDarrick J. Wong bi->bi_bmap = *bmap; 64349f3afb57SDarrick J. Wong 64359f3afb57SDarrick J. Wong error = xfs_defer_join(dfops, bi->bi_owner); 64369f3afb57SDarrick J. Wong if (error) { 64379f3afb57SDarrick J. Wong kmem_free(bi); 64389f3afb57SDarrick J. Wong return error; 64399f3afb57SDarrick J. Wong } 64409f3afb57SDarrick J. Wong 64419f3afb57SDarrick J. Wong xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_BMAP, &bi->bi_list); 64429f3afb57SDarrick J. Wong return 0; 64439f3afb57SDarrick J. Wong } 64449f3afb57SDarrick J. Wong 64459f3afb57SDarrick J. Wong /* Map an extent into a file. */ 64469f3afb57SDarrick J. Wong int 64479f3afb57SDarrick J. Wong xfs_bmap_map_extent( 64489f3afb57SDarrick J. Wong struct xfs_mount *mp, 64499f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 64509f3afb57SDarrick J. Wong struct xfs_inode *ip, 64519f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 64529f3afb57SDarrick J. Wong { 64539f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 64549f3afb57SDarrick J. Wong return 0; 64559f3afb57SDarrick J. Wong 64569f3afb57SDarrick J. Wong return __xfs_bmap_add(mp, dfops, XFS_BMAP_MAP, ip, 64579f3afb57SDarrick J. Wong XFS_DATA_FORK, PREV); 64589f3afb57SDarrick J. Wong } 64599f3afb57SDarrick J. Wong 64609f3afb57SDarrick J. Wong /* Unmap an extent out of a file. */ 64619f3afb57SDarrick J. Wong int 64629f3afb57SDarrick J. Wong xfs_bmap_unmap_extent( 64639f3afb57SDarrick J. Wong struct xfs_mount *mp, 64649f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 64659f3afb57SDarrick J. Wong struct xfs_inode *ip, 64669f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 64679f3afb57SDarrick J. Wong { 64689f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 64699f3afb57SDarrick J. Wong return 0; 64709f3afb57SDarrick J. Wong 64719f3afb57SDarrick J. Wong return __xfs_bmap_add(mp, dfops, XFS_BMAP_UNMAP, ip, 64729f3afb57SDarrick J. Wong XFS_DATA_FORK, PREV); 64739f3afb57SDarrick J. Wong } 64749f3afb57SDarrick J. Wong 64759f3afb57SDarrick J. Wong /* 64769f3afb57SDarrick J. Wong * Process one of the deferred bmap operations. We pass back the 64779f3afb57SDarrick J. Wong * btree cursor to maintain our lock on the bmapbt between calls. 64789f3afb57SDarrick J. Wong */ 64799f3afb57SDarrick J. Wong int 64809f3afb57SDarrick J. Wong xfs_bmap_finish_one( 64819f3afb57SDarrick J. Wong struct xfs_trans *tp, 64829f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 64839f3afb57SDarrick J. Wong struct xfs_inode *ip, 64849f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 64859f3afb57SDarrick J. Wong int whichfork, 64869f3afb57SDarrick J. Wong xfs_fileoff_t startoff, 64879f3afb57SDarrick J. Wong xfs_fsblock_t startblock, 64889f3afb57SDarrick J. Wong xfs_filblks_t blockcount, 64899f3afb57SDarrick J. Wong xfs_exntst_t state) 64909f3afb57SDarrick J. Wong { 64919f3afb57SDarrick J. Wong struct xfs_bmbt_irec bmap; 64929f3afb57SDarrick J. Wong int nimaps = 1; 64939f3afb57SDarrick J. Wong xfs_fsblock_t firstfsb; 64949f3afb57SDarrick J. Wong int done; 64959f3afb57SDarrick J. Wong int error = 0; 64969f3afb57SDarrick J. Wong 64979f3afb57SDarrick J. Wong bmap.br_startblock = startblock; 64989f3afb57SDarrick J. Wong bmap.br_startoff = startoff; 64999f3afb57SDarrick J. Wong bmap.br_blockcount = blockcount; 65009f3afb57SDarrick J. Wong bmap.br_state = state; 65019f3afb57SDarrick J. Wong 65029f3afb57SDarrick J. Wong trace_xfs_bmap_deferred(tp->t_mountp, 65039f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type, 65049f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(tp->t_mountp, startblock), 65059f3afb57SDarrick J. Wong ip->i_ino, whichfork, startoff, blockcount, state); 65069f3afb57SDarrick J. Wong 650739e07daaSChristoph Hellwig if (WARN_ON_ONCE(whichfork != XFS_DATA_FORK)) 65089f3afb57SDarrick J. Wong return -EFSCORRUPTED; 65099f3afb57SDarrick J. Wong 65109f3afb57SDarrick J. Wong if (XFS_TEST_ERROR(false, tp->t_mountp, 65119f3afb57SDarrick J. Wong XFS_ERRTAG_BMAP_FINISH_ONE, 65129f3afb57SDarrick J. Wong XFS_RANDOM_BMAP_FINISH_ONE)) 65139f3afb57SDarrick J. Wong return -EIO; 65149f3afb57SDarrick J. Wong 65159f3afb57SDarrick J. Wong switch (type) { 65169f3afb57SDarrick J. Wong case XFS_BMAP_MAP: 65179f3afb57SDarrick J. Wong firstfsb = bmap.br_startblock; 65189f3afb57SDarrick J. Wong error = xfs_bmapi_write(tp, ip, bmap.br_startoff, 651939e07daaSChristoph Hellwig bmap.br_blockcount, XFS_BMAPI_REMAP, &firstfsb, 65209f3afb57SDarrick J. Wong bmap.br_blockcount, &bmap, &nimaps, 65219f3afb57SDarrick J. Wong dfops); 65229f3afb57SDarrick J. Wong break; 65239f3afb57SDarrick J. Wong case XFS_BMAP_UNMAP: 65249f3afb57SDarrick J. Wong error = xfs_bunmapi(tp, ip, bmap.br_startoff, 652539e07daaSChristoph Hellwig bmap.br_blockcount, XFS_BMAPI_REMAP, 1, &firstfsb, 65269f3afb57SDarrick J. Wong dfops, &done); 65279f3afb57SDarrick J. Wong ASSERT(done); 65289f3afb57SDarrick J. Wong break; 65299f3afb57SDarrick J. Wong default: 65309f3afb57SDarrick J. Wong ASSERT(0); 65319f3afb57SDarrick J. Wong error = -EFSCORRUPTED; 65329f3afb57SDarrick J. Wong } 65339f3afb57SDarrick J. Wong 65349f3afb57SDarrick J. Wong return error; 65359f3afb57SDarrick J. Wong } 6536