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" 52974ae922SBrian Foster #include "xfs_icache.h" 5330f712c9SDave Chinner 5430f712c9SDave Chinner 5530f712c9SDave Chinner kmem_zone_t *xfs_bmap_free_item_zone; 5630f712c9SDave Chinner 5730f712c9SDave Chinner /* 5830f712c9SDave Chinner * Miscellaneous helper functions 5930f712c9SDave Chinner */ 6030f712c9SDave Chinner 6130f712c9SDave Chinner /* 6230f712c9SDave Chinner * Compute and fill in the value of the maximum depth of a bmap btree 6330f712c9SDave Chinner * in this filesystem. Done once, during mount. 6430f712c9SDave Chinner */ 6530f712c9SDave Chinner void 6630f712c9SDave Chinner xfs_bmap_compute_maxlevels( 6730f712c9SDave Chinner xfs_mount_t *mp, /* file system mount structure */ 6830f712c9SDave Chinner int whichfork) /* data or attr fork */ 6930f712c9SDave Chinner { 7030f712c9SDave Chinner int level; /* btree level */ 7130f712c9SDave Chinner uint maxblocks; /* max blocks at this level */ 7230f712c9SDave Chinner uint maxleafents; /* max leaf entries possible */ 7330f712c9SDave Chinner int maxrootrecs; /* max records in root block */ 7430f712c9SDave Chinner int minleafrecs; /* min records in leaf block */ 7530f712c9SDave Chinner int minnoderecs; /* min records in node block */ 7630f712c9SDave Chinner int sz; /* root block size */ 7730f712c9SDave Chinner 7830f712c9SDave Chinner /* 7930f712c9SDave Chinner * The maximum number of extents in a file, hence the maximum 8030f712c9SDave Chinner * number of leaf entries, is controlled by the type of di_nextents 8130f712c9SDave Chinner * (a signed 32-bit number, xfs_extnum_t), or by di_anextents 8230f712c9SDave Chinner * (a signed 16-bit number, xfs_aextnum_t). 8330f712c9SDave Chinner * 8430f712c9SDave Chinner * Note that we can no longer assume that if we are in ATTR1 that 8530f712c9SDave Chinner * the fork offset of all the inodes will be 8630f712c9SDave Chinner * (xfs_default_attroffset(ip) >> 3) because we could have mounted 8730f712c9SDave Chinner * with ATTR2 and then mounted back with ATTR1, keeping the 8830f712c9SDave Chinner * di_forkoff's fixed but probably at various positions. Therefore, 8930f712c9SDave Chinner * for both ATTR1 and ATTR2 we have to assume the worst case scenario 9030f712c9SDave Chinner * of a minimum size available. 9130f712c9SDave Chinner */ 9230f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) { 9330f712c9SDave Chinner maxleafents = MAXEXTNUM; 9430f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); 9530f712c9SDave Chinner } else { 9630f712c9SDave Chinner maxleafents = MAXAEXTNUM; 9730f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); 9830f712c9SDave Chinner } 9930f712c9SDave Chinner maxrootrecs = xfs_bmdr_maxrecs(sz, 0); 10030f712c9SDave Chinner minleafrecs = mp->m_bmap_dmnr[0]; 10130f712c9SDave Chinner minnoderecs = mp->m_bmap_dmnr[1]; 10230f712c9SDave Chinner maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; 10330f712c9SDave Chinner for (level = 1; maxblocks > 1; level++) { 10430f712c9SDave Chinner if (maxblocks <= maxrootrecs) 10530f712c9SDave Chinner maxblocks = 1; 10630f712c9SDave Chinner else 10730f712c9SDave Chinner maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; 10830f712c9SDave Chinner } 10930f712c9SDave Chinner mp->m_bm_maxlevels[whichfork] = level; 11030f712c9SDave Chinner } 11130f712c9SDave Chinner 11230f712c9SDave Chinner STATIC int /* error */ 11330f712c9SDave Chinner xfs_bmbt_lookup_eq( 11430f712c9SDave Chinner struct xfs_btree_cur *cur, 11530f712c9SDave Chinner xfs_fileoff_t off, 11630f712c9SDave Chinner xfs_fsblock_t bno, 11730f712c9SDave Chinner xfs_filblks_t len, 11830f712c9SDave Chinner int *stat) /* success/failure */ 11930f712c9SDave Chinner { 12030f712c9SDave Chinner cur->bc_rec.b.br_startoff = off; 12130f712c9SDave Chinner cur->bc_rec.b.br_startblock = bno; 12230f712c9SDave Chinner cur->bc_rec.b.br_blockcount = len; 12330f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); 12430f712c9SDave Chinner } 12530f712c9SDave Chinner 12630f712c9SDave Chinner STATIC int /* error */ 12730f712c9SDave Chinner xfs_bmbt_lookup_ge( 12830f712c9SDave Chinner struct xfs_btree_cur *cur, 12930f712c9SDave Chinner xfs_fileoff_t off, 13030f712c9SDave Chinner xfs_fsblock_t bno, 13130f712c9SDave Chinner xfs_filblks_t len, 13230f712c9SDave Chinner int *stat) /* success/failure */ 13330f712c9SDave Chinner { 13430f712c9SDave Chinner cur->bc_rec.b.br_startoff = off; 13530f712c9SDave Chinner cur->bc_rec.b.br_startblock = bno; 13630f712c9SDave Chinner cur->bc_rec.b.br_blockcount = len; 13730f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); 13830f712c9SDave Chinner } 13930f712c9SDave Chinner 14030f712c9SDave Chinner /* 14130f712c9SDave Chinner * Check if the inode needs to be converted to btree format. 14230f712c9SDave Chinner */ 14330f712c9SDave Chinner static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) 14430f712c9SDave Chinner { 14560b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 14660b4984fSDarrick J. Wong XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && 14730f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) > 14830f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork); 14930f712c9SDave Chinner } 15030f712c9SDave Chinner 15130f712c9SDave Chinner /* 15230f712c9SDave Chinner * Check if the inode should be converted to extent format. 15330f712c9SDave Chinner */ 15430f712c9SDave Chinner static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) 15530f712c9SDave Chinner { 15660b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 15760b4984fSDarrick J. Wong XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && 15830f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) <= 15930f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork); 16030f712c9SDave Chinner } 16130f712c9SDave Chinner 16230f712c9SDave Chinner /* 163a67d00a5SChristoph Hellwig * Update the record referred to by cur to the value given by irec 16430f712c9SDave Chinner * This either works (return 0) or gets an EFSCORRUPTED error. 16530f712c9SDave Chinner */ 16630f712c9SDave Chinner STATIC int 16730f712c9SDave Chinner xfs_bmbt_update( 16830f712c9SDave Chinner struct xfs_btree_cur *cur, 169a67d00a5SChristoph Hellwig struct xfs_bmbt_irec *irec) 17030f712c9SDave Chinner { 17130f712c9SDave Chinner union xfs_btree_rec rec; 17230f712c9SDave Chinner 173a67d00a5SChristoph Hellwig xfs_bmbt_disk_set_all(&rec.bmbt, irec); 17430f712c9SDave Chinner return xfs_btree_update(cur, &rec); 17530f712c9SDave Chinner } 17630f712c9SDave Chinner 17730f712c9SDave Chinner /* 17830f712c9SDave Chinner * Compute the worst-case number of indirect blocks that will be used 17930f712c9SDave Chinner * for ip's delayed extent of length "len". 18030f712c9SDave Chinner */ 18130f712c9SDave Chinner STATIC xfs_filblks_t 18230f712c9SDave Chinner xfs_bmap_worst_indlen( 18330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 18430f712c9SDave Chinner xfs_filblks_t len) /* delayed extent length */ 18530f712c9SDave Chinner { 18630f712c9SDave Chinner int level; /* btree level number */ 18730f712c9SDave Chinner int maxrecs; /* maximum record count at this level */ 18830f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 18930f712c9SDave Chinner xfs_filblks_t rval; /* return value */ 19030f712c9SDave Chinner 19130f712c9SDave Chinner mp = ip->i_mount; 19230f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[0]; 19330f712c9SDave Chinner for (level = 0, rval = 0; 19430f712c9SDave Chinner level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); 19530f712c9SDave Chinner level++) { 19630f712c9SDave Chinner len += maxrecs - 1; 19730f712c9SDave Chinner do_div(len, maxrecs); 19830f712c9SDave Chinner rval += len; 1995e5c943cSDarrick J. Wong if (len == 1) 2005e5c943cSDarrick J. Wong return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - 20130f712c9SDave Chinner level - 1; 20230f712c9SDave Chinner if (level == 0) 20330f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[1]; 20430f712c9SDave Chinner } 20530f712c9SDave Chinner return rval; 20630f712c9SDave Chinner } 20730f712c9SDave Chinner 20830f712c9SDave Chinner /* 20930f712c9SDave Chinner * Calculate the default attribute fork offset for newly created inodes. 21030f712c9SDave Chinner */ 21130f712c9SDave Chinner uint 21230f712c9SDave Chinner xfs_default_attroffset( 21330f712c9SDave Chinner struct xfs_inode *ip) 21430f712c9SDave Chinner { 21530f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 21630f712c9SDave Chinner uint offset; 21730f712c9SDave Chinner 21830f712c9SDave Chinner if (mp->m_sb.sb_inodesize == 256) { 21930f712c9SDave Chinner offset = XFS_LITINO(mp, ip->i_d.di_version) - 22030f712c9SDave Chinner XFS_BMDR_SPACE_CALC(MINABTPTRS); 22130f712c9SDave Chinner } else { 22230f712c9SDave Chinner offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); 22330f712c9SDave Chinner } 22430f712c9SDave Chinner 22530f712c9SDave Chinner ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); 22630f712c9SDave Chinner return offset; 22730f712c9SDave Chinner } 22830f712c9SDave Chinner 22930f712c9SDave Chinner /* 23030f712c9SDave Chinner * Helper routine to reset inode di_forkoff field when switching 23130f712c9SDave Chinner * attribute fork from local to extent format - we reset it where 23230f712c9SDave Chinner * possible to make space available for inline data fork extents. 23330f712c9SDave Chinner */ 23430f712c9SDave Chinner STATIC void 23530f712c9SDave Chinner xfs_bmap_forkoff_reset( 23630f712c9SDave Chinner xfs_inode_t *ip, 23730f712c9SDave Chinner int whichfork) 23830f712c9SDave Chinner { 23930f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK && 24030f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_DEV && 24130f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_UUID && 24230f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { 24330f712c9SDave Chinner uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; 24430f712c9SDave Chinner 24530f712c9SDave Chinner if (dfl_forkoff > ip->i_d.di_forkoff) 24630f712c9SDave Chinner ip->i_d.di_forkoff = dfl_forkoff; 24730f712c9SDave Chinner } 24830f712c9SDave Chinner } 24930f712c9SDave Chinner 25030f712c9SDave Chinner #ifdef DEBUG 25130f712c9SDave Chinner STATIC struct xfs_buf * 25230f712c9SDave Chinner xfs_bmap_get_bp( 25330f712c9SDave Chinner struct xfs_btree_cur *cur, 25430f712c9SDave Chinner xfs_fsblock_t bno) 25530f712c9SDave Chinner { 25630f712c9SDave Chinner struct xfs_log_item_desc *lidp; 25730f712c9SDave Chinner int i; 25830f712c9SDave Chinner 25930f712c9SDave Chinner if (!cur) 26030f712c9SDave Chinner return NULL; 26130f712c9SDave Chinner 26230f712c9SDave Chinner for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { 26330f712c9SDave Chinner if (!cur->bc_bufs[i]) 26430f712c9SDave Chinner break; 26530f712c9SDave Chinner if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) 26630f712c9SDave Chinner return cur->bc_bufs[i]; 26730f712c9SDave Chinner } 26830f712c9SDave Chinner 26930f712c9SDave Chinner /* Chase down all the log items to see if the bp is there */ 27030f712c9SDave Chinner list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { 27130f712c9SDave Chinner struct xfs_buf_log_item *bip; 27230f712c9SDave Chinner bip = (struct xfs_buf_log_item *)lidp->lid_item; 27330f712c9SDave Chinner if (bip->bli_item.li_type == XFS_LI_BUF && 27430f712c9SDave Chinner XFS_BUF_ADDR(bip->bli_buf) == bno) 27530f712c9SDave Chinner return bip->bli_buf; 27630f712c9SDave Chinner } 27730f712c9SDave Chinner 27830f712c9SDave Chinner return NULL; 27930f712c9SDave Chinner } 28030f712c9SDave Chinner 28130f712c9SDave Chinner STATIC void 28230f712c9SDave Chinner xfs_check_block( 28330f712c9SDave Chinner struct xfs_btree_block *block, 28430f712c9SDave Chinner xfs_mount_t *mp, 28530f712c9SDave Chinner int root, 28630f712c9SDave Chinner short sz) 28730f712c9SDave Chinner { 28830f712c9SDave Chinner int i, j, dmxr; 28930f712c9SDave Chinner __be64 *pp, *thispa; /* pointer to block address */ 29030f712c9SDave Chinner xfs_bmbt_key_t *prevp, *keyp; 29130f712c9SDave Chinner 29230f712c9SDave Chinner ASSERT(be16_to_cpu(block->bb_level) > 0); 29330f712c9SDave Chinner 29430f712c9SDave Chinner prevp = NULL; 29530f712c9SDave Chinner for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { 29630f712c9SDave Chinner dmxr = mp->m_bmap_dmxr[0]; 29730f712c9SDave Chinner keyp = XFS_BMBT_KEY_ADDR(mp, block, i); 29830f712c9SDave Chinner 29930f712c9SDave Chinner if (prevp) { 30030f712c9SDave Chinner ASSERT(be64_to_cpu(prevp->br_startoff) < 30130f712c9SDave Chinner be64_to_cpu(keyp->br_startoff)); 30230f712c9SDave Chinner } 30330f712c9SDave Chinner prevp = keyp; 30430f712c9SDave Chinner 30530f712c9SDave Chinner /* 30630f712c9SDave Chinner * Compare the block numbers to see if there are dups. 30730f712c9SDave Chinner */ 30830f712c9SDave Chinner if (root) 30930f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); 31030f712c9SDave Chinner else 31130f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); 31230f712c9SDave Chinner 31330f712c9SDave Chinner for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { 31430f712c9SDave Chinner if (root) 31530f712c9SDave Chinner thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); 31630f712c9SDave Chinner else 31730f712c9SDave Chinner thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); 31830f712c9SDave Chinner if (*thispa == *pp) { 31930f712c9SDave Chinner xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", 32030f712c9SDave Chinner __func__, j, i, 32130f712c9SDave Chinner (unsigned long long)be64_to_cpu(*thispa)); 32230f712c9SDave Chinner panic("%s: ptrs are equal in node\n", 32330f712c9SDave Chinner __func__); 32430f712c9SDave Chinner } 32530f712c9SDave Chinner } 32630f712c9SDave Chinner } 32730f712c9SDave Chinner } 32830f712c9SDave Chinner 32930f712c9SDave Chinner /* 33030f712c9SDave Chinner * Check that the extents for the inode ip are in the right order in all 331e3543819SDave Chinner * btree leaves. THis becomes prohibitively expensive for large extent count 332e3543819SDave Chinner * files, so don't bother with inodes that have more than 10,000 extents in 333e3543819SDave Chinner * them. The btree record ordering checks will still be done, so for such large 334e3543819SDave Chinner * bmapbt constructs that is going to catch most corruptions. 33530f712c9SDave Chinner */ 33630f712c9SDave Chinner STATIC void 33730f712c9SDave Chinner xfs_bmap_check_leaf_extents( 33830f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor or null */ 33930f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 34030f712c9SDave Chinner int whichfork) /* data or attr fork */ 34130f712c9SDave Chinner { 34230f712c9SDave Chinner struct xfs_btree_block *block; /* current btree block */ 34330f712c9SDave Chinner xfs_fsblock_t bno; /* block # of "block" */ 34430f712c9SDave Chinner xfs_buf_t *bp; /* buffer for "block" */ 34530f712c9SDave Chinner int error; /* error return value */ 34630f712c9SDave Chinner xfs_extnum_t i=0, j; /* index into the extents list */ 34730f712c9SDave Chinner xfs_ifork_t *ifp; /* fork structure */ 34830f712c9SDave Chinner int level; /* btree level, for checking */ 34930f712c9SDave Chinner xfs_mount_t *mp; /* file system mount structure */ 35030f712c9SDave Chinner __be64 *pp; /* pointer to block address */ 35130f712c9SDave Chinner xfs_bmbt_rec_t *ep; /* pointer to current extent */ 35230f712c9SDave Chinner xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ 35330f712c9SDave Chinner xfs_bmbt_rec_t *nextp; /* pointer to next extent */ 35430f712c9SDave Chinner int bp_release = 0; 35530f712c9SDave Chinner 35630f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { 35730f712c9SDave Chinner return; 35830f712c9SDave Chinner } 35930f712c9SDave Chinner 360e3543819SDave Chinner /* skip large extent count inodes */ 361e3543819SDave Chinner if (ip->i_d.di_nextents > 10000) 362e3543819SDave Chinner return; 363e3543819SDave Chinner 36430f712c9SDave Chinner bno = NULLFSBLOCK; 36530f712c9SDave Chinner mp = ip->i_mount; 36630f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 36730f712c9SDave Chinner block = ifp->if_broot; 36830f712c9SDave Chinner /* 36930f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 37030f712c9SDave Chinner */ 37130f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 37230f712c9SDave Chinner ASSERT(level > 0); 37330f712c9SDave Chinner xfs_check_block(block, mp, 1, ifp->if_broot_bytes); 37430f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 37530f712c9SDave Chinner bno = be64_to_cpu(*pp); 37630f712c9SDave Chinner 377d5cf09baSChristoph Hellwig ASSERT(bno != NULLFSBLOCK); 37830f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); 37930f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); 38030f712c9SDave Chinner 38130f712c9SDave Chinner /* 38230f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 38330f712c9SDave Chinner * pointer (leftmost) at each level. 38430f712c9SDave Chinner */ 38530f712c9SDave Chinner while (level-- > 0) { 38630f712c9SDave Chinner /* See if buf is in cur first */ 38730f712c9SDave Chinner bp_release = 0; 38830f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 38930f712c9SDave Chinner if (!bp) { 39030f712c9SDave Chinner bp_release = 1; 39130f712c9SDave Chinner error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, 39230f712c9SDave Chinner XFS_BMAP_BTREE_REF, 39330f712c9SDave Chinner &xfs_bmbt_buf_ops); 39430f712c9SDave Chinner if (error) 39530f712c9SDave Chinner goto error_norelse; 39630f712c9SDave Chinner } 39730f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 39830f712c9SDave Chinner if (level == 0) 39930f712c9SDave Chinner break; 40030f712c9SDave Chinner 40130f712c9SDave Chinner /* 40230f712c9SDave Chinner * Check this block for basic sanity (increasing keys and 40330f712c9SDave Chinner * no duplicate blocks). 40430f712c9SDave Chinner */ 40530f712c9SDave Chinner 40630f712c9SDave Chinner xfs_check_block(block, mp, 0, 0); 40730f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 40830f712c9SDave Chinner bno = be64_to_cpu(*pp); 409c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 410c29aad41SEric Sandeen XFS_FSB_SANITY_CHECK(mp, bno), error0); 41130f712c9SDave Chinner if (bp_release) { 41230f712c9SDave Chinner bp_release = 0; 41330f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 41430f712c9SDave Chinner } 41530f712c9SDave Chinner } 41630f712c9SDave Chinner 41730f712c9SDave Chinner /* 41830f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 41930f712c9SDave Chinner */ 42030f712c9SDave Chinner i = 0; 42130f712c9SDave Chinner 42230f712c9SDave Chinner /* 42330f712c9SDave Chinner * Loop over all leaf nodes checking that all extents are in the right order. 42430f712c9SDave Chinner */ 42530f712c9SDave Chinner for (;;) { 42630f712c9SDave Chinner xfs_fsblock_t nextbno; 42730f712c9SDave Chinner xfs_extnum_t num_recs; 42830f712c9SDave Chinner 42930f712c9SDave Chinner 43030f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 43130f712c9SDave Chinner 43230f712c9SDave Chinner /* 43330f712c9SDave Chinner * Read-ahead the next leaf block, if any. 43430f712c9SDave Chinner */ 43530f712c9SDave Chinner 43630f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 43730f712c9SDave Chinner 43830f712c9SDave Chinner /* 43930f712c9SDave Chinner * Check all the extents to make sure they are OK. 44030f712c9SDave Chinner * If we had a previous block, the last entry should 44130f712c9SDave Chinner * conform with the first entry in this one. 44230f712c9SDave Chinner */ 44330f712c9SDave Chinner 44430f712c9SDave Chinner ep = XFS_BMBT_REC_ADDR(mp, block, 1); 44530f712c9SDave Chinner if (i) { 44630f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(&last) + 44730f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(&last) <= 44830f712c9SDave Chinner xfs_bmbt_disk_get_startoff(ep)); 44930f712c9SDave Chinner } 45030f712c9SDave Chinner for (j = 1; j < num_recs; j++) { 45130f712c9SDave Chinner nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); 45230f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(ep) + 45330f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(ep) <= 45430f712c9SDave Chinner xfs_bmbt_disk_get_startoff(nextp)); 45530f712c9SDave Chinner ep = nextp; 45630f712c9SDave Chinner } 45730f712c9SDave Chinner 45830f712c9SDave Chinner last = *ep; 45930f712c9SDave Chinner i += num_recs; 46030f712c9SDave Chinner if (bp_release) { 46130f712c9SDave Chinner bp_release = 0; 46230f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 46330f712c9SDave Chinner } 46430f712c9SDave Chinner bno = nextbno; 46530f712c9SDave Chinner /* 46630f712c9SDave Chinner * If we've reached the end, stop. 46730f712c9SDave Chinner */ 46830f712c9SDave Chinner if (bno == NULLFSBLOCK) 46930f712c9SDave Chinner break; 47030f712c9SDave Chinner 47130f712c9SDave Chinner bp_release = 0; 47230f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 47330f712c9SDave Chinner if (!bp) { 47430f712c9SDave Chinner bp_release = 1; 47530f712c9SDave Chinner error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, 47630f712c9SDave Chinner XFS_BMAP_BTREE_REF, 47730f712c9SDave Chinner &xfs_bmbt_buf_ops); 47830f712c9SDave Chinner if (error) 47930f712c9SDave Chinner goto error_norelse; 48030f712c9SDave Chinner } 48130f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 48230f712c9SDave Chinner } 483a5fd276bSLuis de Bethencourt 48430f712c9SDave Chinner return; 48530f712c9SDave Chinner 48630f712c9SDave Chinner error0: 48730f712c9SDave Chinner xfs_warn(mp, "%s: at error0", __func__); 48830f712c9SDave Chinner if (bp_release) 48930f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 49030f712c9SDave Chinner error_norelse: 49130f712c9SDave Chinner xfs_warn(mp, "%s: BAD after btree leaves for %d extents", 49230f712c9SDave Chinner __func__, i); 49330f712c9SDave Chinner panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); 49430f712c9SDave Chinner return; 49530f712c9SDave Chinner } 49630f712c9SDave Chinner 49730f712c9SDave Chinner /* 49830f712c9SDave Chinner * Add bmap trace insert entries for all the contents of the extent records. 49930f712c9SDave Chinner */ 50030f712c9SDave Chinner void 50130f712c9SDave Chinner xfs_bmap_trace_exlist( 50230f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 50330f712c9SDave Chinner xfs_extnum_t cnt, /* count of entries in the list */ 504c44a1f22SEric Sandeen int whichfork, /* data or attr or cow fork */ 50530f712c9SDave Chinner unsigned long caller_ip) 50630f712c9SDave Chinner { 50730f712c9SDave Chinner xfs_extnum_t idx; /* extent record index */ 50830f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 50930f712c9SDave Chinner int state = 0; 51030f712c9SDave Chinner 51130f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK) 51230f712c9SDave Chinner state |= BMAP_ATTRFORK; 513c44a1f22SEric Sandeen else if (whichfork == XFS_COW_FORK) 514c44a1f22SEric Sandeen state |= BMAP_COWFORK; 51530f712c9SDave Chinner 51630f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 5175d829300SEric Sandeen ASSERT(cnt == xfs_iext_count(ifp)); 51830f712c9SDave Chinner for (idx = 0; idx < cnt; idx++) 5197710517fSEric Sandeen trace_xfs_extlist(ip, idx, state, caller_ip); 52030f712c9SDave Chinner } 52130f712c9SDave Chinner 52230f712c9SDave Chinner /* 52330f712c9SDave Chinner * Validate that the bmbt_irecs being returned from bmapi are valid 52430f712c9SDave Chinner * given the caller's original parameters. Specifically check the 52530f712c9SDave Chinner * ranges of the returned irecs to ensure that they only extend beyond 52630f712c9SDave Chinner * the given parameters if the XFS_BMAPI_ENTIRE flag was set. 52730f712c9SDave Chinner */ 52830f712c9SDave Chinner STATIC void 52930f712c9SDave Chinner xfs_bmap_validate_ret( 53030f712c9SDave Chinner xfs_fileoff_t bno, 53130f712c9SDave Chinner xfs_filblks_t len, 53230f712c9SDave Chinner int flags, 53330f712c9SDave Chinner xfs_bmbt_irec_t *mval, 53430f712c9SDave Chinner int nmap, 53530f712c9SDave Chinner int ret_nmap) 53630f712c9SDave Chinner { 53730f712c9SDave Chinner int i; /* index to map values */ 53830f712c9SDave Chinner 53930f712c9SDave Chinner ASSERT(ret_nmap <= nmap); 54030f712c9SDave Chinner 54130f712c9SDave Chinner for (i = 0; i < ret_nmap; i++) { 54230f712c9SDave Chinner ASSERT(mval[i].br_blockcount > 0); 54330f712c9SDave Chinner if (!(flags & XFS_BMAPI_ENTIRE)) { 54430f712c9SDave Chinner ASSERT(mval[i].br_startoff >= bno); 54530f712c9SDave Chinner ASSERT(mval[i].br_blockcount <= len); 54630f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= 54730f712c9SDave Chinner bno + len); 54830f712c9SDave Chinner } else { 54930f712c9SDave Chinner ASSERT(mval[i].br_startoff < bno + len); 55030f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount > 55130f712c9SDave Chinner bno); 55230f712c9SDave Chinner } 55330f712c9SDave Chinner ASSERT(i == 0 || 55430f712c9SDave Chinner mval[i - 1].br_startoff + mval[i - 1].br_blockcount == 55530f712c9SDave Chinner mval[i].br_startoff); 55630f712c9SDave Chinner ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && 55730f712c9SDave Chinner mval[i].br_startblock != HOLESTARTBLOCK); 55830f712c9SDave Chinner ASSERT(mval[i].br_state == XFS_EXT_NORM || 55930f712c9SDave Chinner mval[i].br_state == XFS_EXT_UNWRITTEN); 56030f712c9SDave Chinner } 56130f712c9SDave Chinner } 56230f712c9SDave Chinner 56330f712c9SDave Chinner #else 56430f712c9SDave Chinner #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) 5657bf7a193SDarrick J. Wong #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) do { } while (0) 56630f712c9SDave Chinner #endif /* DEBUG */ 56730f712c9SDave Chinner 56830f712c9SDave Chinner /* 56930f712c9SDave Chinner * bmap free list manipulation functions 57030f712c9SDave Chinner */ 57130f712c9SDave Chinner 57230f712c9SDave Chinner /* 57330f712c9SDave Chinner * Add the extent to the list of extents to be free at transaction end. 57430f712c9SDave Chinner * The list is maintained sorted (by block number). 57530f712c9SDave Chinner */ 57630f712c9SDave Chinner void 57730f712c9SDave Chinner xfs_bmap_add_free( 578340785ccSDarrick J. Wong struct xfs_mount *mp, 579340785ccSDarrick J. Wong struct xfs_defer_ops *dfops, 580340785ccSDarrick J. Wong xfs_fsblock_t bno, 581340785ccSDarrick J. Wong xfs_filblks_t len, 582340785ccSDarrick J. Wong struct xfs_owner_info *oinfo) 58330f712c9SDave Chinner { 584310a75a3SDarrick J. Wong struct xfs_extent_free_item *new; /* new element */ 58530f712c9SDave Chinner #ifdef DEBUG 58630f712c9SDave Chinner xfs_agnumber_t agno; 58730f712c9SDave Chinner xfs_agblock_t agbno; 58830f712c9SDave Chinner 58930f712c9SDave Chinner ASSERT(bno != NULLFSBLOCK); 59030f712c9SDave Chinner ASSERT(len > 0); 59130f712c9SDave Chinner ASSERT(len <= MAXEXTLEN); 59230f712c9SDave Chinner ASSERT(!isnullstartblock(bno)); 59330f712c9SDave Chinner agno = XFS_FSB_TO_AGNO(mp, bno); 59430f712c9SDave Chinner agbno = XFS_FSB_TO_AGBNO(mp, bno); 59530f712c9SDave Chinner ASSERT(agno < mp->m_sb.sb_agcount); 59630f712c9SDave Chinner ASSERT(agbno < mp->m_sb.sb_agblocks); 59730f712c9SDave Chinner ASSERT(len < mp->m_sb.sb_agblocks); 59830f712c9SDave Chinner ASSERT(agbno + len <= mp->m_sb.sb_agblocks); 59930f712c9SDave Chinner #endif 60030f712c9SDave Chinner ASSERT(xfs_bmap_free_item_zone != NULL); 601340785ccSDarrick J. Wong 60230f712c9SDave Chinner new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); 603310a75a3SDarrick J. Wong new->xefi_startblock = bno; 604310a75a3SDarrick J. Wong new->xefi_blockcount = (xfs_extlen_t)len; 605340785ccSDarrick J. Wong if (oinfo) 606340785ccSDarrick J. Wong new->xefi_oinfo = *oinfo; 607340785ccSDarrick J. Wong else 608340785ccSDarrick J. Wong xfs_rmap_skip_owner_update(&new->xefi_oinfo); 609ba9e7802SDarrick J. Wong trace_xfs_bmap_free_defer(mp, XFS_FSB_TO_AGNO(mp, bno), 0, 610ba9e7802SDarrick J. Wong XFS_FSB_TO_AGBNO(mp, bno), len); 6112c3234d1SDarrick J. Wong xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_FREE, &new->xefi_list); 61230f712c9SDave Chinner } 61330f712c9SDave Chinner 61430f712c9SDave Chinner /* 61530f712c9SDave Chinner * Inode fork format manipulation functions 61630f712c9SDave Chinner */ 61730f712c9SDave Chinner 61830f712c9SDave Chinner /* 61930f712c9SDave Chinner * Transform a btree format file with only one leaf node, where the 62030f712c9SDave Chinner * extents list will fit in the inode, into an extents format file. 62130f712c9SDave Chinner * Since the file extents are already in-core, all we have to do is 62230f712c9SDave Chinner * give up the space for the btree root and pitch the leaf block. 62330f712c9SDave Chinner */ 62430f712c9SDave Chinner STATIC int /* error */ 62530f712c9SDave Chinner xfs_bmap_btree_to_extents( 62630f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 62730f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 62830f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor */ 62930f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 63030f712c9SDave Chinner int whichfork) /* data or attr fork */ 63130f712c9SDave Chinner { 63230f712c9SDave Chinner /* REFERENCED */ 63330f712c9SDave Chinner struct xfs_btree_block *cblock;/* child btree block */ 63430f712c9SDave Chinner xfs_fsblock_t cbno; /* child block number */ 63530f712c9SDave Chinner xfs_buf_t *cbp; /* child block's buffer */ 63630f712c9SDave Chinner int error; /* error return value */ 63730f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork data */ 63830f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 63930f712c9SDave Chinner __be64 *pp; /* ptr to block address */ 64030f712c9SDave Chinner struct xfs_btree_block *rblock;/* root btree block */ 641340785ccSDarrick J. Wong struct xfs_owner_info oinfo; 64230f712c9SDave Chinner 64330f712c9SDave Chinner mp = ip->i_mount; 64430f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 64560b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 64630f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 64730f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); 64830f712c9SDave Chinner rblock = ifp->if_broot; 64930f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_level) == 1); 65030f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); 65130f712c9SDave Chinner ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); 65230f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); 65330f712c9SDave Chinner cbno = be64_to_cpu(*pp); 65430f712c9SDave Chinner *logflagsp = 0; 65530f712c9SDave Chinner #ifdef DEBUG 65630f712c9SDave Chinner if ((error = xfs_btree_check_lptr(cur, cbno, 1))) 65730f712c9SDave Chinner return error; 65830f712c9SDave Chinner #endif 65930f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, 66030f712c9SDave Chinner &xfs_bmbt_buf_ops); 66130f712c9SDave Chinner if (error) 66230f712c9SDave Chinner return error; 66330f712c9SDave Chinner cblock = XFS_BUF_TO_BLOCK(cbp); 66430f712c9SDave Chinner if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) 66530f712c9SDave Chinner return error; 666340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork); 667340785ccSDarrick J. Wong xfs_bmap_add_free(mp, cur->bc_private.b.dfops, cbno, 1, &oinfo); 66830f712c9SDave Chinner ip->i_d.di_nblocks--; 66930f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); 67030f712c9SDave Chinner xfs_trans_binval(tp, cbp); 67130f712c9SDave Chinner if (cur->bc_bufs[0] == cbp) 67230f712c9SDave Chinner cur->bc_bufs[0] = NULL; 67330f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 67430f712c9SDave Chinner ASSERT(ifp->if_broot == NULL); 67530f712c9SDave Chinner ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); 67630f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); 67730f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 67830f712c9SDave Chinner return 0; 67930f712c9SDave Chinner } 68030f712c9SDave Chinner 68130f712c9SDave Chinner /* 68230f712c9SDave Chinner * Convert an extents-format file into a btree-format file. 68330f712c9SDave Chinner * The new file will have a root block (in the inode) and a single child block. 68430f712c9SDave Chinner */ 68530f712c9SDave Chinner STATIC int /* error */ 68630f712c9SDave Chinner xfs_bmap_extents_to_btree( 68730f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 68830f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 68930f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first-block-allocated */ 6902c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks freed in xaction */ 69130f712c9SDave Chinner xfs_btree_cur_t **curp, /* cursor returned to caller */ 69230f712c9SDave Chinner int wasdel, /* converting a delayed alloc */ 69330f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 69430f712c9SDave Chinner int whichfork) /* data or attr fork */ 69530f712c9SDave Chinner { 69630f712c9SDave Chinner struct xfs_btree_block *ablock; /* allocated (child) bt block */ 69730f712c9SDave Chinner xfs_buf_t *abp; /* buffer for ablock */ 69830f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 69930f712c9SDave Chinner xfs_bmbt_rec_t *arp; /* child record pointer */ 70030f712c9SDave Chinner struct xfs_btree_block *block; /* btree root block */ 70130f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 70230f712c9SDave Chinner xfs_bmbt_rec_host_t *ep; /* extent record pointer */ 70330f712c9SDave Chinner int error; /* error return value */ 70430f712c9SDave Chinner xfs_extnum_t i, cnt; /* extent record index */ 70530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 70630f712c9SDave Chinner xfs_bmbt_key_t *kp; /* root block key pointer */ 70730f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 70830f712c9SDave Chinner xfs_extnum_t nextents; /* number of file extents */ 70930f712c9SDave Chinner xfs_bmbt_ptr_t *pp; /* root block address pointer */ 71030f712c9SDave Chinner 71130f712c9SDave Chinner mp = ip->i_mount; 71260b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 71330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 71430f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); 71530f712c9SDave Chinner 71630f712c9SDave Chinner /* 71730f712c9SDave Chinner * Make space in the inode incore. 71830f712c9SDave Chinner */ 71930f712c9SDave Chinner xfs_iroot_realloc(ip, 1, whichfork); 72030f712c9SDave Chinner ifp->if_flags |= XFS_IFBROOT; 72130f712c9SDave Chinner 72230f712c9SDave Chinner /* 72330f712c9SDave Chinner * Fill in the root. 72430f712c9SDave Chinner */ 72530f712c9SDave Chinner block = ifp->if_broot; 72630f712c9SDave Chinner xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, 727b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 1, 1, ip->i_ino, 728f88ae46bSEric Sandeen XFS_BTREE_LONG_PTRS); 72930f712c9SDave Chinner /* 73030f712c9SDave Chinner * Need a cursor. Can't allocate until bb_level is filled in. 73130f712c9SDave Chinner */ 73230f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 73330f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 7342c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 73530f712c9SDave Chinner cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; 73630f712c9SDave Chinner /* 73730f712c9SDave Chinner * Convert to a btree with two levels, one record in root. 73830f712c9SDave Chinner */ 73930f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); 74030f712c9SDave Chinner memset(&args, 0, sizeof(args)); 74130f712c9SDave Chinner args.tp = tp; 74230f712c9SDave Chinner args.mp = mp; 743340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); 74430f712c9SDave Chinner args.firstblock = *firstblock; 74530f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 74630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 74730f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); 7482c3234d1SDarrick J. Wong } else if (dfops->dop_low) { 74930f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 75030f712c9SDave Chinner args.fsbno = *firstblock; 75130f712c9SDave Chinner } else { 75230f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 75330f712c9SDave Chinner args.fsbno = *firstblock; 75430f712c9SDave Chinner } 75530f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 75630f712c9SDave Chinner args.wasdel = wasdel; 75730f712c9SDave Chinner *logflagsp = 0; 75830f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) { 75930f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 76030f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 76130f712c9SDave Chinner return error; 76230f712c9SDave Chinner } 76390e2056dSDarrick J. Wong 7642fcc319dSChristoph Hellwig if (WARN_ON_ONCE(args.fsbno == NULLFSBLOCK)) { 7652fcc319dSChristoph Hellwig xfs_iroot_realloc(ip, -1, whichfork); 7662fcc319dSChristoph Hellwig xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 7672fcc319dSChristoph Hellwig return -ENOSPC; 7682fcc319dSChristoph Hellwig } 76930f712c9SDave Chinner /* 77030f712c9SDave Chinner * Allocation can't fail, the space was reserved. 77130f712c9SDave Chinner */ 77230f712c9SDave Chinner ASSERT(*firstblock == NULLFSBLOCK || 773410d17f6SChristoph Hellwig args.agno >= XFS_FSB_TO_AGNO(mp, *firstblock)); 77430f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock = args.fsbno; 77530f712c9SDave Chinner cur->bc_private.b.allocated++; 77630f712c9SDave Chinner ip->i_d.di_nblocks++; 77730f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); 77830f712c9SDave Chinner abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); 77930f712c9SDave Chinner /* 78030f712c9SDave Chinner * Fill in the child block. 78130f712c9SDave Chinner */ 78230f712c9SDave Chinner abp->b_ops = &xfs_bmbt_buf_ops; 78330f712c9SDave Chinner ablock = XFS_BUF_TO_BLOCK(abp); 78430f712c9SDave Chinner xfs_btree_init_block_int(mp, ablock, abp->b_bn, 785b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 0, 0, ip->i_ino, 78630f712c9SDave Chinner XFS_BTREE_LONG_PTRS); 78730f712c9SDave Chinner 78830f712c9SDave Chinner arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); 7895d829300SEric Sandeen nextents = xfs_iext_count(ifp); 79030f712c9SDave Chinner for (cnt = i = 0; i < nextents; i++) { 79130f712c9SDave Chinner ep = xfs_iext_get_ext(ifp, i); 79230f712c9SDave Chinner if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { 79330f712c9SDave Chinner arp->l0 = cpu_to_be64(ep->l0); 79430f712c9SDave Chinner arp->l1 = cpu_to_be64(ep->l1); 79530f712c9SDave Chinner arp++; cnt++; 79630f712c9SDave Chinner } 79730f712c9SDave Chinner } 79830f712c9SDave Chinner ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); 79930f712c9SDave Chinner xfs_btree_set_numrecs(ablock, cnt); 80030f712c9SDave Chinner 80130f712c9SDave Chinner /* 80230f712c9SDave Chinner * Fill in the root key and pointer. 80330f712c9SDave Chinner */ 80430f712c9SDave Chinner kp = XFS_BMBT_KEY_ADDR(mp, block, 1); 80530f712c9SDave Chinner arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); 80630f712c9SDave Chinner kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); 80730f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, 80830f712c9SDave Chinner be16_to_cpu(block->bb_level))); 80930f712c9SDave Chinner *pp = cpu_to_be64(args.fsbno); 81030f712c9SDave Chinner 81130f712c9SDave Chinner /* 81230f712c9SDave Chinner * Do all this logging at the end so that 81330f712c9SDave Chinner * the root is at the right level. 81430f712c9SDave Chinner */ 81530f712c9SDave Chinner xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); 81630f712c9SDave Chinner xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); 81730f712c9SDave Chinner ASSERT(*curp == NULL); 81830f712c9SDave Chinner *curp = cur; 81930f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); 82030f712c9SDave Chinner return 0; 82130f712c9SDave Chinner } 82230f712c9SDave Chinner 82330f712c9SDave Chinner /* 82430f712c9SDave Chinner * Convert a local file to an extents file. 82530f712c9SDave Chinner * This code is out of bounds for data forks of regular files, 82630f712c9SDave Chinner * since the file data needs to get logged so things will stay consistent. 82730f712c9SDave Chinner * (The bmap-level manipulations are ok, though). 82830f712c9SDave Chinner */ 82930f712c9SDave Chinner void 83030f712c9SDave Chinner xfs_bmap_local_to_extents_empty( 83130f712c9SDave Chinner struct xfs_inode *ip, 83230f712c9SDave Chinner int whichfork) 83330f712c9SDave Chinner { 83430f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 83530f712c9SDave Chinner 83660b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 83730f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 83830f712c9SDave Chinner ASSERT(ifp->if_bytes == 0); 83930f712c9SDave Chinner ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); 84030f712c9SDave Chinner 84130f712c9SDave Chinner xfs_bmap_forkoff_reset(ip, whichfork); 84230f712c9SDave Chinner ifp->if_flags &= ~XFS_IFINLINE; 84330f712c9SDave Chinner ifp->if_flags |= XFS_IFEXTENTS; 84430f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); 84530f712c9SDave Chinner } 84630f712c9SDave Chinner 84730f712c9SDave Chinner 84830f712c9SDave Chinner STATIC int /* error */ 84930f712c9SDave Chinner xfs_bmap_local_to_extents( 85030f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 85130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 85230f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated in xaction */ 85330f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed by transaction */ 85430f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 85530f712c9SDave Chinner int whichfork, 85630f712c9SDave Chinner void (*init_fn)(struct xfs_trans *tp, 85730f712c9SDave Chinner struct xfs_buf *bp, 85830f712c9SDave Chinner struct xfs_inode *ip, 85930f712c9SDave Chinner struct xfs_ifork *ifp)) 86030f712c9SDave Chinner { 86130f712c9SDave Chinner int error = 0; 86230f712c9SDave Chinner int flags; /* logging flags returned */ 86330f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 86430f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 86530f712c9SDave Chinner xfs_buf_t *bp; /* buffer for extent block */ 86650bb44c2SChristoph Hellwig struct xfs_bmbt_irec rec; 86730f712c9SDave Chinner 86830f712c9SDave Chinner /* 86930f712c9SDave Chinner * We don't want to deal with the case of keeping inode data inline yet. 87030f712c9SDave Chinner * So sending the data fork of a regular inode is invalid. 87130f712c9SDave Chinner */ 872c19b3b05SDave Chinner ASSERT(!(S_ISREG(VFS_I(ip)->i_mode) && whichfork == XFS_DATA_FORK)); 87330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 87430f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 87530f712c9SDave Chinner 87630f712c9SDave Chinner if (!ifp->if_bytes) { 87730f712c9SDave Chinner xfs_bmap_local_to_extents_empty(ip, whichfork); 87830f712c9SDave Chinner flags = XFS_ILOG_CORE; 87930f712c9SDave Chinner goto done; 88030f712c9SDave Chinner } 88130f712c9SDave Chinner 88230f712c9SDave Chinner flags = 0; 88330f712c9SDave Chinner error = 0; 88430f712c9SDave Chinner ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == 88530f712c9SDave Chinner XFS_IFINLINE); 88630f712c9SDave Chinner memset(&args, 0, sizeof(args)); 88730f712c9SDave Chinner args.tp = tp; 88830f712c9SDave Chinner args.mp = ip->i_mount; 889340785ccSDarrick J. Wong xfs_rmap_ino_owner(&args.oinfo, ip->i_ino, whichfork, 0); 89030f712c9SDave Chinner args.firstblock = *firstblock; 89130f712c9SDave Chinner /* 89230f712c9SDave Chinner * Allocate a block. We know we need only one, since the 89330f712c9SDave Chinner * file currently fits in an inode. 89430f712c9SDave Chinner */ 89530f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 89630f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); 89730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 89830f712c9SDave Chinner } else { 89930f712c9SDave Chinner args.fsbno = *firstblock; 90030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 90130f712c9SDave Chinner } 90230f712c9SDave Chinner args.total = total; 90330f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 90430f712c9SDave Chinner error = xfs_alloc_vextent(&args); 90530f712c9SDave Chinner if (error) 90630f712c9SDave Chinner goto done; 90730f712c9SDave Chinner 90830f712c9SDave Chinner /* Can't fail, the space was reserved. */ 90930f712c9SDave Chinner ASSERT(args.fsbno != NULLFSBLOCK); 91030f712c9SDave Chinner ASSERT(args.len == 1); 91130f712c9SDave Chinner *firstblock = args.fsbno; 91230f712c9SDave Chinner bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); 91330f712c9SDave Chinner 914fe22d552SDave Chinner /* 915b7cdc66bSBrian Foster * Initialize the block, copy the data and log the remote buffer. 916fe22d552SDave Chinner * 917b7cdc66bSBrian Foster * The callout is responsible for logging because the remote format 918b7cdc66bSBrian Foster * might differ from the local format and thus we don't know how much to 919b7cdc66bSBrian Foster * log here. Note that init_fn must also set the buffer log item type 920b7cdc66bSBrian Foster * correctly. 921fe22d552SDave Chinner */ 92230f712c9SDave Chinner init_fn(tp, bp, ip, ifp); 92330f712c9SDave Chinner 924b7cdc66bSBrian Foster /* account for the change in fork size */ 92530f712c9SDave Chinner xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); 92630f712c9SDave Chinner xfs_bmap_local_to_extents_empty(ip, whichfork); 92730f712c9SDave Chinner flags |= XFS_ILOG_CORE; 92830f712c9SDave Chinner 92950bb44c2SChristoph Hellwig rec.br_startoff = 0; 93050bb44c2SChristoph Hellwig rec.br_startblock = args.fsbno; 93150bb44c2SChristoph Hellwig rec.br_blockcount = 1; 93250bb44c2SChristoph Hellwig rec.br_state = XFS_EXT_NORM; 93350bb44c2SChristoph Hellwig xfs_iext_insert(ip, 0, 1, &rec, 0); 93450bb44c2SChristoph Hellwig 93530f712c9SDave Chinner trace_xfs_bmap_post_update(ip, 0, 93630f712c9SDave Chinner whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, 93730f712c9SDave Chinner _THIS_IP_); 93830f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 1); 93930f712c9SDave Chinner ip->i_d.di_nblocks = 1; 94030f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, 94130f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 1L); 94230f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 94330f712c9SDave Chinner 94430f712c9SDave Chinner done: 94530f712c9SDave Chinner *logflagsp = flags; 94630f712c9SDave Chinner return error; 94730f712c9SDave Chinner } 94830f712c9SDave Chinner 94930f712c9SDave Chinner /* 95030f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle btree format files. 95130f712c9SDave Chinner */ 95230f712c9SDave Chinner STATIC int /* error */ 95330f712c9SDave Chinner xfs_bmap_add_attrfork_btree( 95430f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 95530f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 95630f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 9572c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 95830f712c9SDave Chinner int *flags) /* inode logging flags */ 95930f712c9SDave Chinner { 96030f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 96130f712c9SDave Chinner int error; /* error return value */ 96230f712c9SDave Chinner xfs_mount_t *mp; /* file system mount struct */ 96330f712c9SDave Chinner int stat; /* newroot status */ 96430f712c9SDave Chinner 96530f712c9SDave Chinner mp = ip->i_mount; 96630f712c9SDave Chinner if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) 96730f712c9SDave Chinner *flags |= XFS_ILOG_DBROOT; 96830f712c9SDave Chinner else { 96930f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); 9702c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 97130f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 97230f712c9SDave Chinner if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) 97330f712c9SDave Chinner goto error0; 97430f712c9SDave Chinner /* must be at least one entry */ 975c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, stat == 1, error0); 97630f712c9SDave Chinner if ((error = xfs_btree_new_iroot(cur, flags, &stat))) 97730f712c9SDave Chinner goto error0; 97830f712c9SDave Chinner if (stat == 0) { 97930f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 9802451337dSDave Chinner return -ENOSPC; 98130f712c9SDave Chinner } 98230f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock; 98330f712c9SDave Chinner cur->bc_private.b.allocated = 0; 98430f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 98530f712c9SDave Chinner } 98630f712c9SDave Chinner return 0; 98730f712c9SDave Chinner error0: 98830f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 98930f712c9SDave Chinner return error; 99030f712c9SDave Chinner } 99130f712c9SDave Chinner 99230f712c9SDave Chinner /* 99330f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle extents format files. 99430f712c9SDave Chinner */ 99530f712c9SDave Chinner STATIC int /* error */ 99630f712c9SDave Chinner xfs_bmap_add_attrfork_extents( 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; /* bmap btree cursor */ 100430f712c9SDave Chinner int error; /* error return value */ 100530f712c9SDave Chinner 100630f712c9SDave Chinner if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) 100730f712c9SDave Chinner return 0; 100830f712c9SDave Chinner cur = NULL; 10092c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, &cur, 0, 101030f712c9SDave Chinner flags, XFS_DATA_FORK); 101130f712c9SDave Chinner if (cur) { 101230f712c9SDave Chinner cur->bc_private.b.allocated = 0; 101330f712c9SDave Chinner xfs_btree_del_cursor(cur, 101430f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 101530f712c9SDave Chinner } 101630f712c9SDave Chinner return error; 101730f712c9SDave Chinner } 101830f712c9SDave Chinner 101930f712c9SDave Chinner /* 102030f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle local format files. Each 102130f712c9SDave Chinner * different data fork content type needs a different callout to do the 102230f712c9SDave Chinner * conversion. Some are basic and only require special block initialisation 102330f712c9SDave Chinner * callouts for the data formating, others (directories) are so specialised they 102430f712c9SDave Chinner * handle everything themselves. 102530f712c9SDave Chinner * 102630f712c9SDave Chinner * XXX (dgc): investigate whether directory conversion can use the generic 102730f712c9SDave Chinner * formatting callout. It should be possible - it's just a very complex 102830f712c9SDave Chinner * formatter. 102930f712c9SDave Chinner */ 103030f712c9SDave Chinner STATIC int /* error */ 103130f712c9SDave Chinner xfs_bmap_add_attrfork_local( 103230f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 103330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 103430f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 10352c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 103630f712c9SDave Chinner int *flags) /* inode logging flags */ 103730f712c9SDave Chinner { 103830f712c9SDave Chinner xfs_da_args_t dargs; /* args for dir/attr code */ 103930f712c9SDave Chinner 104030f712c9SDave Chinner if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) 104130f712c9SDave Chinner return 0; 104230f712c9SDave Chinner 1043c19b3b05SDave Chinner if (S_ISDIR(VFS_I(ip)->i_mode)) { 104430f712c9SDave Chinner memset(&dargs, 0, sizeof(dargs)); 104530f712c9SDave Chinner dargs.geo = ip->i_mount->m_dir_geo; 104630f712c9SDave Chinner dargs.dp = ip; 104730f712c9SDave Chinner dargs.firstblock = firstblock; 10482c3234d1SDarrick J. Wong dargs.dfops = dfops; 104930f712c9SDave Chinner dargs.total = dargs.geo->fsbcount; 105030f712c9SDave Chinner dargs.whichfork = XFS_DATA_FORK; 105130f712c9SDave Chinner dargs.trans = tp; 105230f712c9SDave Chinner return xfs_dir2_sf_to_block(&dargs); 105330f712c9SDave Chinner } 105430f712c9SDave Chinner 1055c19b3b05SDave Chinner if (S_ISLNK(VFS_I(ip)->i_mode)) 105630f712c9SDave Chinner return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, 105730f712c9SDave Chinner flags, XFS_DATA_FORK, 105830f712c9SDave Chinner xfs_symlink_local_to_remote); 105930f712c9SDave Chinner 106030f712c9SDave Chinner /* should only be called for types that support local format data */ 106130f712c9SDave Chinner ASSERT(0); 10622451337dSDave Chinner return -EFSCORRUPTED; 106330f712c9SDave Chinner } 106430f712c9SDave Chinner 106530f712c9SDave Chinner /* 106630f712c9SDave Chinner * Convert inode from non-attributed to attributed. 106730f712c9SDave Chinner * Must not be in a transaction, ip must not be locked. 106830f712c9SDave Chinner */ 106930f712c9SDave Chinner int /* error code */ 107030f712c9SDave Chinner xfs_bmap_add_attrfork( 107130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 107230f712c9SDave Chinner int size, /* space new attribute needs */ 107330f712c9SDave Chinner int rsvd) /* xact may use reserved blks */ 107430f712c9SDave Chinner { 107530f712c9SDave Chinner xfs_fsblock_t firstblock; /* 1st block/ag allocated */ 10762c3234d1SDarrick J. Wong struct xfs_defer_ops dfops; /* freed extent records */ 107730f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 107830f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 107930f712c9SDave Chinner int blks; /* space reservation */ 108030f712c9SDave Chinner int version = 1; /* superblock attr version */ 108130f712c9SDave Chinner int logflags; /* logging flags */ 108230f712c9SDave Chinner int error; /* error return value */ 108330f712c9SDave Chinner 108430f712c9SDave Chinner ASSERT(XFS_IFORK_Q(ip) == 0); 108530f712c9SDave Chinner 108630f712c9SDave Chinner mp = ip->i_mount; 108730f712c9SDave Chinner ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); 1088253f4911SChristoph Hellwig 108930f712c9SDave Chinner blks = XFS_ADDAFORK_SPACE_RES(mp); 1090253f4911SChristoph Hellwig 1091253f4911SChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_addafork, blks, 0, 1092253f4911SChristoph Hellwig rsvd ? XFS_TRANS_RESERVE : 0, &tp); 1093253f4911SChristoph Hellwig if (error) 109430f712c9SDave Chinner return error; 1095253f4911SChristoph Hellwig 109630f712c9SDave Chinner xfs_ilock(ip, XFS_ILOCK_EXCL); 109730f712c9SDave Chinner error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? 109830f712c9SDave Chinner XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : 109930f712c9SDave Chinner XFS_QMOPT_RES_REGBLKS); 110030f712c9SDave Chinner if (error) 110130f712c9SDave Chinner goto trans_cancel; 110230f712c9SDave Chinner if (XFS_IFORK_Q(ip)) 110330f712c9SDave Chinner goto trans_cancel; 11040f352f8eSDarrick J. Wong if (ip->i_d.di_anextents != 0) { 11050f352f8eSDarrick J. Wong error = -EFSCORRUPTED; 11060f352f8eSDarrick J. Wong goto trans_cancel; 11070f352f8eSDarrick J. Wong } 110830f712c9SDave Chinner if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { 110930f712c9SDave Chinner /* 111030f712c9SDave Chinner * For inodes coming from pre-6.2 filesystems. 111130f712c9SDave Chinner */ 111230f712c9SDave Chinner ASSERT(ip->i_d.di_aformat == 0); 111330f712c9SDave Chinner ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; 111430f712c9SDave Chinner } 111530f712c9SDave Chinner 111630f712c9SDave Chinner xfs_trans_ijoin(tp, ip, 0); 111730f712c9SDave Chinner xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 111830f712c9SDave Chinner 111930f712c9SDave Chinner switch (ip->i_d.di_format) { 112030f712c9SDave Chinner case XFS_DINODE_FMT_DEV: 112130f712c9SDave Chinner ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; 112230f712c9SDave Chinner break; 112330f712c9SDave Chinner case XFS_DINODE_FMT_UUID: 112430f712c9SDave Chinner ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; 112530f712c9SDave Chinner break; 112630f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 112730f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 112830f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 112930f712c9SDave Chinner ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); 113030f712c9SDave Chinner if (!ip->i_d.di_forkoff) 113130f712c9SDave Chinner ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; 113230f712c9SDave Chinner else if (mp->m_flags & XFS_MOUNT_ATTR2) 113330f712c9SDave Chinner version = 2; 113430f712c9SDave Chinner break; 113530f712c9SDave Chinner default: 113630f712c9SDave Chinner ASSERT(0); 11372451337dSDave Chinner error = -EINVAL; 113830f712c9SDave Chinner goto trans_cancel; 113930f712c9SDave Chinner } 114030f712c9SDave Chinner 114130f712c9SDave Chinner ASSERT(ip->i_afp == NULL); 114230f712c9SDave Chinner ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); 114330f712c9SDave Chinner ip->i_afp->if_flags = XFS_IFEXTENTS; 114430f712c9SDave Chinner logflags = 0; 11452c3234d1SDarrick J. Wong xfs_defer_init(&dfops, &firstblock); 114630f712c9SDave Chinner switch (ip->i_d.di_format) { 114730f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 11482c3234d1SDarrick J. Wong error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &dfops, 114930f712c9SDave Chinner &logflags); 115030f712c9SDave Chinner break; 115130f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 115230f712c9SDave Chinner error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, 11532c3234d1SDarrick J. Wong &dfops, &logflags); 115430f712c9SDave Chinner break; 115530f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 11562c3234d1SDarrick J. Wong error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &dfops, 115730f712c9SDave Chinner &logflags); 115830f712c9SDave Chinner break; 115930f712c9SDave Chinner default: 116030f712c9SDave Chinner error = 0; 116130f712c9SDave Chinner break; 116230f712c9SDave Chinner } 116330f712c9SDave Chinner if (logflags) 116430f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 116530f712c9SDave Chinner if (error) 116630f712c9SDave Chinner goto bmap_cancel; 116730f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb) || 116830f712c9SDave Chinner (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { 116961e63ecbSDave Chinner bool log_sb = false; 117030f712c9SDave Chinner 117130f712c9SDave Chinner spin_lock(&mp->m_sb_lock); 117230f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb)) { 117330f712c9SDave Chinner xfs_sb_version_addattr(&mp->m_sb); 117461e63ecbSDave Chinner log_sb = true; 117530f712c9SDave Chinner } 117630f712c9SDave Chinner if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { 117730f712c9SDave Chinner xfs_sb_version_addattr2(&mp->m_sb); 117861e63ecbSDave Chinner log_sb = true; 117930f712c9SDave Chinner } 118030f712c9SDave Chinner spin_unlock(&mp->m_sb_lock); 118161e63ecbSDave Chinner if (log_sb) 118261e63ecbSDave Chinner xfs_log_sb(tp); 118330f712c9SDave Chinner } 118430f712c9SDave Chinner 11858ad7c629SChristoph Hellwig error = xfs_defer_finish(&tp, &dfops); 118630f712c9SDave Chinner if (error) 118730f712c9SDave Chinner goto bmap_cancel; 118870393313SChristoph Hellwig error = xfs_trans_commit(tp); 118930f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 119030f712c9SDave Chinner return error; 119130f712c9SDave Chinner 119230f712c9SDave Chinner bmap_cancel: 11932c3234d1SDarrick J. Wong xfs_defer_cancel(&dfops); 119430f712c9SDave Chinner trans_cancel: 11954906e215SChristoph Hellwig xfs_trans_cancel(tp); 119630f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 119730f712c9SDave Chinner return error; 119830f712c9SDave Chinner } 119930f712c9SDave Chinner 120030f712c9SDave Chinner /* 120130f712c9SDave Chinner * Internal and external extent tree search functions. 120230f712c9SDave Chinner */ 120330f712c9SDave Chinner 120430f712c9SDave Chinner /* 120530f712c9SDave Chinner * Read in the extents to if_extents. 120630f712c9SDave Chinner * All inode fields are set up by caller, we just traverse the btree 120730f712c9SDave Chinner * and copy the records in. If the file system cannot contain unwritten 120830f712c9SDave Chinner * extents, the records are checked for no "state" flags. 120930f712c9SDave Chinner */ 121030f712c9SDave Chinner int /* error */ 121130f712c9SDave Chinner xfs_bmap_read_extents( 121230f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 121330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 121430f712c9SDave Chinner int whichfork) /* data or attr fork */ 121530f712c9SDave Chinner { 121630f712c9SDave Chinner struct xfs_btree_block *block; /* current btree block */ 121730f712c9SDave Chinner xfs_fsblock_t bno; /* block # of "block" */ 121830f712c9SDave Chinner xfs_buf_t *bp; /* buffer for "block" */ 121930f712c9SDave Chinner int error; /* error return value */ 122030f712c9SDave Chinner xfs_extnum_t i, j; /* index into the extents list */ 122130f712c9SDave Chinner xfs_ifork_t *ifp; /* fork structure */ 122230f712c9SDave Chinner int level; /* btree level, for checking */ 122330f712c9SDave Chinner xfs_mount_t *mp; /* file system mount structure */ 122430f712c9SDave Chinner __be64 *pp; /* pointer to block address */ 122530f712c9SDave Chinner /* REFERENCED */ 122630f712c9SDave Chinner xfs_extnum_t room; /* number of entries there's room for */ 122730f712c9SDave Chinner 122830f712c9SDave Chinner mp = ip->i_mount; 122930f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 123030f712c9SDave Chinner block = ifp->if_broot; 123130f712c9SDave Chinner /* 123230f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 123330f712c9SDave Chinner */ 123430f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 123530f712c9SDave Chinner ASSERT(level > 0); 123630f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 123730f712c9SDave Chinner bno = be64_to_cpu(*pp); 1238d5a91baeSDarrick J. Wong 123930f712c9SDave Chinner /* 124030f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 124130f712c9SDave Chinner * pointer (leftmost) at each level. 124230f712c9SDave Chinner */ 124330f712c9SDave Chinner while (level-- > 0) { 124430f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, 124530f712c9SDave Chinner XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); 124630f712c9SDave Chinner if (error) 124730f712c9SDave Chinner return error; 124830f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 124930f712c9SDave Chinner if (level == 0) 125030f712c9SDave Chinner break; 125130f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 125230f712c9SDave Chinner bno = be64_to_cpu(*pp); 1253c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 1254c29aad41SEric Sandeen XFS_FSB_SANITY_CHECK(mp, bno), error0); 125530f712c9SDave Chinner xfs_trans_brelse(tp, bp); 125630f712c9SDave Chinner } 125730f712c9SDave Chinner /* 125830f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 125930f712c9SDave Chinner */ 12605d829300SEric Sandeen room = xfs_iext_count(ifp); 126130f712c9SDave Chinner i = 0; 126230f712c9SDave Chinner /* 126330f712c9SDave Chinner * Loop over all leaf nodes. Copy information to the extent records. 126430f712c9SDave Chinner */ 126530f712c9SDave Chinner for (;;) { 126630f712c9SDave Chinner xfs_bmbt_rec_t *frp; 126730f712c9SDave Chinner xfs_fsblock_t nextbno; 126830f712c9SDave Chinner xfs_extnum_t num_recs; 126930f712c9SDave Chinner 127030f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 127130f712c9SDave Chinner if (unlikely(i + num_recs > room)) { 127230f712c9SDave Chinner ASSERT(i + num_recs <= room); 127330f712c9SDave Chinner xfs_warn(ip->i_mount, 127430f712c9SDave Chinner "corrupt dinode %Lu, (btree extents).", 127530f712c9SDave Chinner (unsigned long long) ip->i_ino); 127630f712c9SDave Chinner XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)", 127730f712c9SDave Chinner XFS_ERRLEVEL_LOW, ip->i_mount, block); 127830f712c9SDave Chinner goto error0; 127930f712c9SDave Chinner } 128030f712c9SDave Chinner /* 128130f712c9SDave Chinner * Read-ahead the next leaf block, if any. 128230f712c9SDave Chinner */ 128330f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 128430f712c9SDave Chinner if (nextbno != NULLFSBLOCK) 128530f712c9SDave Chinner xfs_btree_reada_bufl(mp, nextbno, 1, 128630f712c9SDave Chinner &xfs_bmbt_buf_ops); 128730f712c9SDave Chinner /* 128830f712c9SDave Chinner * Copy records into the extent records. 128930f712c9SDave Chinner */ 129030f712c9SDave Chinner frp = XFS_BMBT_REC_ADDR(mp, block, 1); 129130f712c9SDave Chinner for (j = 0; j < num_recs; j++, i++, frp++) { 129230f712c9SDave Chinner xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); 129330f712c9SDave Chinner trp->l0 = be64_to_cpu(frp->l0); 129430f712c9SDave Chinner trp->l1 = be64_to_cpu(frp->l1); 12950c1d9e4aSChristoph Hellwig if (!xfs_bmbt_validate_extent(mp, whichfork, trp)) { 129630f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", 12970c1d9e4aSChristoph Hellwig XFS_ERRLEVEL_LOW, mp); 129830f712c9SDave Chinner goto error0; 129930f712c9SDave Chinner } 130030f712c9SDave Chinner } 130130f712c9SDave Chinner xfs_trans_brelse(tp, bp); 130230f712c9SDave Chinner bno = nextbno; 130330f712c9SDave Chinner /* 130430f712c9SDave Chinner * If we've reached the end, stop. 130530f712c9SDave Chinner */ 130630f712c9SDave Chinner if (bno == NULLFSBLOCK) 130730f712c9SDave Chinner break; 130830f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, 130930f712c9SDave Chinner XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); 131030f712c9SDave Chinner if (error) 131130f712c9SDave Chinner return error; 131230f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 131330f712c9SDave Chinner } 1314356a3225SDarrick J. Wong if (i != XFS_IFORK_NEXTENTS(ip, whichfork)) 1315356a3225SDarrick J. Wong return -EFSCORRUPTED; 13165d829300SEric Sandeen ASSERT(i == xfs_iext_count(ifp)); 131730f712c9SDave Chinner XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); 131830f712c9SDave Chinner return 0; 131930f712c9SDave Chinner error0: 132030f712c9SDave Chinner xfs_trans_brelse(tp, bp); 13212451337dSDave Chinner return -EFSCORRUPTED; 132230f712c9SDave Chinner } 132330f712c9SDave Chinner 132430f712c9SDave Chinner /* 132530f712c9SDave Chinner * Returns the file-relative block number of the first unused block(s) 132630f712c9SDave Chinner * in the file with at least "len" logically contiguous blocks free. 132730f712c9SDave Chinner * This is the lowest-address hole if the file has holes, else the first block 132830f712c9SDave Chinner * past the end of file. 132930f712c9SDave Chinner * Return 0 if the file is currently local (in-inode). 133030f712c9SDave Chinner */ 133130f712c9SDave Chinner int /* error */ 133230f712c9SDave Chinner xfs_bmap_first_unused( 133330f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 133430f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 133530f712c9SDave Chinner xfs_extlen_t len, /* size of hole to find */ 133630f712c9SDave Chinner xfs_fileoff_t *first_unused, /* unused block */ 133730f712c9SDave Chinner int whichfork) /* data or attr fork */ 133830f712c9SDave Chinner { 133930f712c9SDave Chinner int error; /* error return value */ 134030f712c9SDave Chinner int idx; /* extent record index */ 134130f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 134230f712c9SDave Chinner xfs_fileoff_t lastaddr; /* last block number seen */ 134330f712c9SDave Chinner xfs_fileoff_t lowest; /* lowest useful block */ 134430f712c9SDave Chinner xfs_fileoff_t max; /* starting useful block */ 134530f712c9SDave Chinner xfs_extnum_t nextents; /* number of extent entries */ 134630f712c9SDave Chinner 134730f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || 134830f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || 134930f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 135030f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { 135130f712c9SDave Chinner *first_unused = 0; 135230f712c9SDave Chinner return 0; 135330f712c9SDave Chinner } 135430f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 135530f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS) && 135630f712c9SDave Chinner (error = xfs_iread_extents(tp, ip, whichfork))) 135730f712c9SDave Chinner return error; 135830f712c9SDave Chinner lowest = *first_unused; 13595d829300SEric Sandeen nextents = xfs_iext_count(ifp); 136030f712c9SDave Chinner for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { 1361f2285c14SChristoph Hellwig struct xfs_bmbt_irec got; 1362f2285c14SChristoph Hellwig 1363f2285c14SChristoph Hellwig xfs_iext_get_extent(ifp, idx, &got); 1364f2285c14SChristoph Hellwig 136530f712c9SDave Chinner /* 136630f712c9SDave Chinner * See if the hole before this extent will work. 136730f712c9SDave Chinner */ 1368f2285c14SChristoph Hellwig if (got.br_startoff >= lowest + len && 1369f2285c14SChristoph Hellwig got.br_startoff - max >= len) { 137030f712c9SDave Chinner *first_unused = max; 137130f712c9SDave Chinner return 0; 137230f712c9SDave Chinner } 1373f2285c14SChristoph Hellwig lastaddr = got.br_startoff + got.br_blockcount; 137430f712c9SDave Chinner max = XFS_FILEOFF_MAX(lastaddr, lowest); 137530f712c9SDave Chinner } 137630f712c9SDave Chinner *first_unused = max; 137730f712c9SDave Chinner return 0; 137830f712c9SDave Chinner } 137930f712c9SDave Chinner 138030f712c9SDave Chinner /* 138130f712c9SDave Chinner * Returns the file-relative block number of the last block - 1 before 138230f712c9SDave Chinner * last_block (input value) in the file. 138330f712c9SDave Chinner * This is not based on i_size, it is based on the extent records. 138430f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 138530f712c9SDave Chinner */ 138630f712c9SDave Chinner int /* error */ 138730f712c9SDave Chinner xfs_bmap_last_before( 138886685f7bSChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 138986685f7bSChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 139030f712c9SDave Chinner xfs_fileoff_t *last_block, /* last block */ 139130f712c9SDave Chinner int whichfork) /* data or attr fork */ 139230f712c9SDave Chinner { 139386685f7bSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 139486685f7bSChristoph Hellwig struct xfs_bmbt_irec got; 139586685f7bSChristoph Hellwig xfs_extnum_t idx; 139686685f7bSChristoph Hellwig int error; 139730f712c9SDave Chinner 139886685f7bSChristoph Hellwig switch (XFS_IFORK_FORMAT(ip, whichfork)) { 139986685f7bSChristoph Hellwig case XFS_DINODE_FMT_LOCAL: 140030f712c9SDave Chinner *last_block = 0; 140130f712c9SDave Chinner return 0; 140286685f7bSChristoph Hellwig case XFS_DINODE_FMT_BTREE: 140386685f7bSChristoph Hellwig case XFS_DINODE_FMT_EXTENTS: 140486685f7bSChristoph Hellwig break; 140586685f7bSChristoph Hellwig default: 140686685f7bSChristoph Hellwig return -EIO; 140730f712c9SDave Chinner } 140886685f7bSChristoph Hellwig 140986685f7bSChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 141086685f7bSChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 141186685f7bSChristoph Hellwig if (error) 141230f712c9SDave Chinner return error; 141330f712c9SDave Chinner } 141486685f7bSChristoph Hellwig 141586685f7bSChristoph Hellwig if (xfs_iext_lookup_extent(ip, ifp, *last_block - 1, &idx, &got)) { 141686685f7bSChristoph Hellwig if (got.br_startoff <= *last_block - 1) 141786685f7bSChristoph Hellwig return 0; 141886685f7bSChristoph Hellwig } 141986685f7bSChristoph Hellwig 142086685f7bSChristoph Hellwig if (xfs_iext_get_extent(ifp, idx - 1, &got)) { 142186685f7bSChristoph Hellwig *last_block = got.br_startoff + got.br_blockcount; 142286685f7bSChristoph Hellwig return 0; 142386685f7bSChristoph Hellwig } 142486685f7bSChristoph Hellwig 142586685f7bSChristoph Hellwig *last_block = 0; 142630f712c9SDave Chinner return 0; 142730f712c9SDave Chinner } 142830f712c9SDave Chinner 142930f712c9SDave Chinner int 143030f712c9SDave Chinner xfs_bmap_last_extent( 143130f712c9SDave Chinner struct xfs_trans *tp, 143230f712c9SDave Chinner struct xfs_inode *ip, 143330f712c9SDave Chinner int whichfork, 143430f712c9SDave Chinner struct xfs_bmbt_irec *rec, 143530f712c9SDave Chinner int *is_empty) 143630f712c9SDave Chinner { 143730f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 143830f712c9SDave Chinner int error; 143930f712c9SDave Chinner int nextents; 144030f712c9SDave Chinner 144130f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 144230f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 144330f712c9SDave Chinner if (error) 144430f712c9SDave Chinner return error; 144530f712c9SDave Chinner } 144630f712c9SDave Chinner 14475d829300SEric Sandeen nextents = xfs_iext_count(ifp); 144830f712c9SDave Chinner if (nextents == 0) { 144930f712c9SDave Chinner *is_empty = 1; 145030f712c9SDave Chinner return 0; 145130f712c9SDave Chinner } 145230f712c9SDave Chinner 1453e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, nextents - 1, rec); 145430f712c9SDave Chinner *is_empty = 0; 145530f712c9SDave Chinner return 0; 145630f712c9SDave Chinner } 145730f712c9SDave Chinner 145830f712c9SDave Chinner /* 145930f712c9SDave Chinner * Check the last inode extent to determine whether this allocation will result 146030f712c9SDave Chinner * in blocks being allocated at the end of the file. When we allocate new data 146130f712c9SDave Chinner * blocks at the end of the file which do not start at the previous data block, 146230f712c9SDave Chinner * we will try to align the new blocks at stripe unit boundaries. 146330f712c9SDave Chinner * 146430f712c9SDave Chinner * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be 146530f712c9SDave Chinner * at, or past the EOF. 146630f712c9SDave Chinner */ 146730f712c9SDave Chinner STATIC int 146830f712c9SDave Chinner xfs_bmap_isaeof( 146930f712c9SDave Chinner struct xfs_bmalloca *bma, 147030f712c9SDave Chinner int whichfork) 147130f712c9SDave Chinner { 147230f712c9SDave Chinner struct xfs_bmbt_irec rec; 147330f712c9SDave Chinner int is_empty; 147430f712c9SDave Chinner int error; 147530f712c9SDave Chinner 1476749f24f3SThomas Meyer bma->aeof = false; 147730f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, 147830f712c9SDave Chinner &is_empty); 147930f712c9SDave Chinner if (error) 148030f712c9SDave Chinner return error; 148130f712c9SDave Chinner 148230f712c9SDave Chinner if (is_empty) { 1483749f24f3SThomas Meyer bma->aeof = true; 148430f712c9SDave Chinner return 0; 148530f712c9SDave Chinner } 148630f712c9SDave Chinner 148730f712c9SDave Chinner /* 148830f712c9SDave Chinner * Check if we are allocation or past the last extent, or at least into 148930f712c9SDave Chinner * the last delayed allocated extent. 149030f712c9SDave Chinner */ 149130f712c9SDave Chinner bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || 149230f712c9SDave Chinner (bma->offset >= rec.br_startoff && 149330f712c9SDave Chinner isnullstartblock(rec.br_startblock)); 149430f712c9SDave Chinner return 0; 149530f712c9SDave Chinner } 149630f712c9SDave Chinner 149730f712c9SDave Chinner /* 149830f712c9SDave Chinner * Returns the file-relative block number of the first block past eof in 149930f712c9SDave Chinner * the file. This is not based on i_size, it is based on the extent records. 150030f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 150130f712c9SDave Chinner */ 150230f712c9SDave Chinner int 150330f712c9SDave Chinner xfs_bmap_last_offset( 150430f712c9SDave Chinner struct xfs_inode *ip, 150530f712c9SDave Chinner xfs_fileoff_t *last_block, 150630f712c9SDave Chinner int whichfork) 150730f712c9SDave Chinner { 150830f712c9SDave Chinner struct xfs_bmbt_irec rec; 150930f712c9SDave Chinner int is_empty; 151030f712c9SDave Chinner int error; 151130f712c9SDave Chinner 151230f712c9SDave Chinner *last_block = 0; 151330f712c9SDave Chinner 151430f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) 151530f712c9SDave Chinner return 0; 151630f712c9SDave Chinner 151730f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && 151830f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 15192451337dSDave Chinner return -EIO; 152030f712c9SDave Chinner 152130f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); 152230f712c9SDave Chinner if (error || is_empty) 152330f712c9SDave Chinner return error; 152430f712c9SDave Chinner 152530f712c9SDave Chinner *last_block = rec.br_startoff + rec.br_blockcount; 152630f712c9SDave Chinner return 0; 152730f712c9SDave Chinner } 152830f712c9SDave Chinner 152930f712c9SDave Chinner /* 153030f712c9SDave Chinner * Returns whether the selected fork of the inode has exactly one 153130f712c9SDave Chinner * block or not. For the data fork we check this matches di_size, 153230f712c9SDave Chinner * implying the file's range is 0..bsize-1. 153330f712c9SDave Chinner */ 153430f712c9SDave Chinner int /* 1=>1 block, 0=>otherwise */ 153530f712c9SDave Chinner xfs_bmap_one_block( 153630f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 153730f712c9SDave Chinner int whichfork) /* data or attr fork */ 153830f712c9SDave Chinner { 153930f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 154030f712c9SDave Chinner int rval; /* return value */ 154130f712c9SDave Chinner xfs_bmbt_irec_t s; /* internal version of extent */ 154230f712c9SDave Chinner 154330f712c9SDave Chinner #ifndef DEBUG 154430f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) 154530f712c9SDave Chinner return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; 154630f712c9SDave Chinner #endif /* !DEBUG */ 154730f712c9SDave Chinner if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) 154830f712c9SDave Chinner return 0; 154930f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 155030f712c9SDave Chinner return 0; 155130f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 155230f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 1553e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, 0, &s); 155430f712c9SDave Chinner rval = s.br_startoff == 0 && s.br_blockcount == 1; 155530f712c9SDave Chinner if (rval && whichfork == XFS_DATA_FORK) 155630f712c9SDave Chinner ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); 155730f712c9SDave Chinner return rval; 155830f712c9SDave Chinner } 155930f712c9SDave Chinner 156030f712c9SDave Chinner /* 156130f712c9SDave Chinner * Extent tree manipulation functions used during allocation. 156230f712c9SDave Chinner */ 156330f712c9SDave Chinner 156430f712c9SDave Chinner /* 156530f712c9SDave Chinner * Convert a delayed allocation to a real allocation. 156630f712c9SDave Chinner */ 156730f712c9SDave Chinner STATIC int /* error */ 156830f712c9SDave Chinner xfs_bmap_add_extent_delay_real( 156960b4984fSDarrick J. Wong struct xfs_bmalloca *bma, 157060b4984fSDarrick J. Wong int whichfork) 157130f712c9SDave Chinner { 157230f712c9SDave Chinner struct xfs_bmbt_irec *new = &bma->got; 157330f712c9SDave Chinner int error; /* error return value */ 157430f712c9SDave Chinner int i; /* temp state */ 157530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 157630f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 157730f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 157830f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 157930f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 158030f712c9SDave Chinner int state = 0;/* state bits, accessed thru macros */ 158130f712c9SDave Chinner xfs_filblks_t da_new; /* new count del alloc blocks used */ 158230f712c9SDave Chinner xfs_filblks_t da_old; /* old count del alloc blocks used */ 158330f712c9SDave Chinner xfs_filblks_t temp=0; /* value for da_new calculations */ 158430f712c9SDave Chinner int tmp_rval; /* partial logging flags */ 1585c29aad41SEric Sandeen struct xfs_mount *mp; 158660b4984fSDarrick J. Wong xfs_extnum_t *nextents; 15874dcb8869SChristoph Hellwig struct xfs_bmbt_irec old; 158830f712c9SDave Chinner 1589f1f96c49SEric Sandeen mp = bma->ip->i_mount; 15906d3eb1ecSDarrick J. Wong ifp = XFS_IFORK_PTR(bma->ip, whichfork); 159160b4984fSDarrick J. Wong ASSERT(whichfork != XFS_ATTR_FORK); 159260b4984fSDarrick J. Wong nextents = (whichfork == XFS_COW_FORK ? &bma->ip->i_cnextents : 159360b4984fSDarrick J. Wong &bma->ip->i_d.di_nextents); 159430f712c9SDave Chinner 159530f712c9SDave Chinner ASSERT(bma->idx >= 0); 15965d829300SEric Sandeen ASSERT(bma->idx <= xfs_iext_count(ifp)); 159730f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 159830f712c9SDave Chinner ASSERT(!bma->cur || 159930f712c9SDave Chinner (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); 160030f712c9SDave Chinner 1601ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 160230f712c9SDave Chinner 160330f712c9SDave Chinner #define LEFT r[0] 160430f712c9SDave Chinner #define RIGHT r[1] 160530f712c9SDave Chinner #define PREV r[2] 160630f712c9SDave Chinner 160760b4984fSDarrick J. Wong if (whichfork == XFS_COW_FORK) 160860b4984fSDarrick J. Wong state |= BMAP_COWFORK; 160960b4984fSDarrick J. Wong 161030f712c9SDave Chinner /* 161130f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 161230f712c9SDave Chinner */ 16134dcb8869SChristoph Hellwig xfs_iext_get_extent(ifp, bma->idx, &PREV); 161430f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 16154dcb8869SChristoph Hellwig ASSERT(isnullstartblock(PREV.br_startblock)); 161630f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 161730f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 161830f712c9SDave Chinner 161930f712c9SDave Chinner da_old = startblockval(PREV.br_startblock); 162030f712c9SDave Chinner da_new = 0; 162130f712c9SDave Chinner 162230f712c9SDave Chinner /* 162330f712c9SDave Chinner * Set flags determining what part of the previous delayed allocation 162430f712c9SDave Chinner * extent is being replaced by a real allocation. 162530f712c9SDave Chinner */ 162630f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 162730f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 162830f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 162930f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 163030f712c9SDave Chinner 163130f712c9SDave Chinner /* 163230f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 163330f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 163430f712c9SDave Chinner */ 163530f712c9SDave Chinner if (bma->idx > 0) { 163630f712c9SDave Chinner state |= BMAP_LEFT_VALID; 1637e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, bma->idx - 1, &LEFT); 163830f712c9SDave Chinner 163930f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 164030f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 164130f712c9SDave Chinner } 164230f712c9SDave Chinner 164330f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 164430f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 164530f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 164630f712c9SDave Chinner LEFT.br_state == new->br_state && 164730f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 164830f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 164930f712c9SDave Chinner 165030f712c9SDave Chinner /* 165130f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 165230f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 165330f712c9SDave Chinner * Also check for all-three-contiguous being too large. 165430f712c9SDave Chinner */ 16555d829300SEric Sandeen if (bma->idx < xfs_iext_count(ifp) - 1) { 165630f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 1657e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, bma->idx + 1, &RIGHT); 165830f712c9SDave Chinner 165930f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 166030f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 166130f712c9SDave Chinner } 166230f712c9SDave Chinner 166330f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 166430f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 166530f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 166630f712c9SDave Chinner new->br_state == RIGHT.br_state && 166730f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 166830f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 166930f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 167030f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 167130f712c9SDave Chinner BMAP_RIGHT_FILLING) || 167230f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 167330f712c9SDave Chinner <= MAXEXTLEN)) 167430f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 167530f712c9SDave Chinner 167630f712c9SDave Chinner error = 0; 167730f712c9SDave Chinner /* 167830f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 167930f712c9SDave Chinner */ 168030f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 168130f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 168230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 168330f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 168430f712c9SDave Chinner /* 168530f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 168630f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 168730f712c9SDave Chinner */ 168830f712c9SDave Chinner bma->idx--; 168930f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 16904dcb8869SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; 16914dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &LEFT); 169230f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 169330f712c9SDave Chinner 169430f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); 169560b4984fSDarrick J. Wong (*nextents)--; 169630f712c9SDave Chinner if (bma->cur == NULL) 169730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 169830f712c9SDave Chinner else { 169930f712c9SDave Chinner rval = XFS_ILOG_CORE; 170030f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, 170130f712c9SDave Chinner RIGHT.br_startblock, 170230f712c9SDave Chinner RIGHT.br_blockcount, &i); 170330f712c9SDave Chinner if (error) 170430f712c9SDave Chinner goto done; 1705c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 170630f712c9SDave Chinner error = xfs_btree_delete(bma->cur, &i); 170730f712c9SDave Chinner if (error) 170830f712c9SDave Chinner goto done; 1709c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 171030f712c9SDave Chinner error = xfs_btree_decrement(bma->cur, 0, &i); 171130f712c9SDave Chinner if (error) 171230f712c9SDave Chinner goto done; 1713c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1714a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 171530f712c9SDave Chinner if (error) 171630f712c9SDave Chinner goto done; 171730f712c9SDave Chinner } 171830f712c9SDave Chinner break; 171930f712c9SDave Chinner 172030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 172130f712c9SDave Chinner /* 172230f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 172330f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 172430f712c9SDave Chinner */ 172530f712c9SDave Chinner bma->idx--; 172630f712c9SDave Chinner 17274dcb8869SChristoph Hellwig old = LEFT; 172830f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 17294dcb8869SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount; 17304dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &LEFT); 173130f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 173230f712c9SDave Chinner 173330f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); 173430f712c9SDave Chinner if (bma->cur == NULL) 173530f712c9SDave Chinner rval = XFS_ILOG_DEXT; 173630f712c9SDave Chinner else { 173730f712c9SDave Chinner rval = 0; 17384dcb8869SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, old.br_startoff, 17394dcb8869SChristoph Hellwig old.br_startblock, old.br_blockcount, 174030f712c9SDave Chinner &i); 174130f712c9SDave Chinner if (error) 174230f712c9SDave Chinner goto done; 1743c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1744a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 174530f712c9SDave Chinner if (error) 174630f712c9SDave Chinner goto done; 174730f712c9SDave Chinner } 174830f712c9SDave Chinner break; 174930f712c9SDave Chinner 175030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 175130f712c9SDave Chinner /* 175230f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 175330f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 175430f712c9SDave Chinner */ 175530f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 17564dcb8869SChristoph Hellwig PREV.br_startblock = new->br_startblock; 17574dcb8869SChristoph Hellwig PREV.br_blockcount += RIGHT.br_blockcount; 17584dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &PREV); 175930f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 176030f712c9SDave Chinner 176130f712c9SDave Chinner xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); 176230f712c9SDave Chinner if (bma->cur == NULL) 176330f712c9SDave Chinner rval = XFS_ILOG_DEXT; 176430f712c9SDave Chinner else { 176530f712c9SDave Chinner rval = 0; 176630f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, 176730f712c9SDave Chinner RIGHT.br_startblock, 176830f712c9SDave Chinner RIGHT.br_blockcount, &i); 176930f712c9SDave Chinner if (error) 177030f712c9SDave Chinner goto done; 1771c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1772a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &PREV); 177330f712c9SDave Chinner if (error) 177430f712c9SDave Chinner goto done; 177530f712c9SDave Chinner } 177630f712c9SDave Chinner break; 177730f712c9SDave Chinner 177830f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 177930f712c9SDave Chinner /* 178030f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 178130f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 178230f712c9SDave Chinner * the new one. 178330f712c9SDave Chinner */ 178430f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 17854dcb8869SChristoph Hellwig PREV.br_startblock = new->br_startblock; 17864dcb8869SChristoph Hellwig PREV.br_state = new->br_state; 17874dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &PREV); 178830f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 178930f712c9SDave Chinner 179060b4984fSDarrick J. Wong (*nextents)++; 179130f712c9SDave Chinner if (bma->cur == NULL) 179230f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 179330f712c9SDave Chinner else { 179430f712c9SDave Chinner rval = XFS_ILOG_CORE; 179530f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 179630f712c9SDave Chinner new->br_startblock, new->br_blockcount, 179730f712c9SDave Chinner &i); 179830f712c9SDave Chinner if (error) 179930f712c9SDave Chinner goto done; 1800c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 180130f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 180230f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 180330f712c9SDave Chinner if (error) 180430f712c9SDave Chinner goto done; 1805c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 180630f712c9SDave Chinner } 180730f712c9SDave Chinner break; 180830f712c9SDave Chinner 180930f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 181030f712c9SDave Chinner /* 181130f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 181230f712c9SDave Chinner * The left neighbor is contiguous. 181330f712c9SDave Chinner */ 18144dcb8869SChristoph Hellwig old = LEFT; 18154dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 18164dcb8869SChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 18174dcb8869SChristoph Hellwig startblockval(PREV.br_startblock)); 18184dcb8869SChristoph Hellwig 181930f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); 18204dcb8869SChristoph Hellwig LEFT.br_blockcount += new->br_blockcount; 18214dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx - 1, &LEFT); 182230f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); 182330f712c9SDave Chinner 182430f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 18254dcb8869SChristoph Hellwig PREV.br_blockcount = temp = PREV.br_blockcount - new->br_blockcount; 18264dcb8869SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 18274dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 18284dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &PREV); 18294dcb8869SChristoph Hellwig trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 18304dcb8869SChristoph Hellwig 183130f712c9SDave Chinner if (bma->cur == NULL) 183230f712c9SDave Chinner rval = XFS_ILOG_DEXT; 183330f712c9SDave Chinner else { 183430f712c9SDave Chinner rval = 0; 18354dcb8869SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, old.br_startoff, 18364dcb8869SChristoph Hellwig old.br_startblock, old.br_blockcount, 183730f712c9SDave Chinner &i); 183830f712c9SDave Chinner if (error) 183930f712c9SDave Chinner goto done; 1840c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1841a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 184230f712c9SDave Chinner if (error) 184330f712c9SDave Chinner goto done; 184430f712c9SDave Chinner } 184530f712c9SDave Chinner 184630f712c9SDave Chinner bma->idx--; 184730f712c9SDave Chinner break; 184830f712c9SDave Chinner 184930f712c9SDave Chinner case BMAP_LEFT_FILLING: 185030f712c9SDave Chinner /* 185130f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 185230f712c9SDave Chinner * The left neighbor is not contiguous. 185330f712c9SDave Chinner */ 185430f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx, 1, new, state); 185560b4984fSDarrick J. Wong (*nextents)++; 185630f712c9SDave Chinner if (bma->cur == NULL) 185730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 185830f712c9SDave Chinner else { 185930f712c9SDave Chinner rval = XFS_ILOG_CORE; 186030f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 186130f712c9SDave Chinner new->br_startblock, new->br_blockcount, 186230f712c9SDave Chinner &i); 186330f712c9SDave Chinner if (error) 186430f712c9SDave Chinner goto done; 1865c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 186630f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 186730f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 186830f712c9SDave Chinner if (error) 186930f712c9SDave Chinner goto done; 1870c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 187130f712c9SDave Chinner } 187230f712c9SDave Chinner 18736d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 187430f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 18752c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, 18766d3eb1ecSDarrick J. Wong &bma->cur, 1, &tmp_rval, whichfork); 187730f712c9SDave Chinner rval |= tmp_rval; 187830f712c9SDave Chinner if (error) 187930f712c9SDave Chinner goto done; 188030f712c9SDave Chinner } 18814dcb8869SChristoph Hellwig 18824dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 188330f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 188430f712c9SDave Chinner startblockval(PREV.br_startblock) - 188530f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 18864dcb8869SChristoph Hellwig 18874dcb8869SChristoph Hellwig trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 18884dcb8869SChristoph Hellwig PREV.br_startoff = new_endoff; 18894dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 18904dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 18914dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx + 1, &PREV); 189230f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 18934dcb8869SChristoph Hellwig 189430f712c9SDave Chinner break; 189530f712c9SDave Chinner 189630f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 189730f712c9SDave Chinner /* 189830f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 189930f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 190030f712c9SDave Chinner */ 19014dcb8869SChristoph Hellwig old = RIGHT; 190230f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 19034dcb8869SChristoph Hellwig RIGHT.br_startoff = new->br_startoff; 19044dcb8869SChristoph Hellwig RIGHT.br_startblock = new->br_startblock; 19054dcb8869SChristoph Hellwig RIGHT.br_blockcount += new->br_blockcount; 19064dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx + 1, &RIGHT); 190730f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); 19084dcb8869SChristoph Hellwig 190930f712c9SDave Chinner if (bma->cur == NULL) 191030f712c9SDave Chinner rval = XFS_ILOG_DEXT; 191130f712c9SDave Chinner else { 191230f712c9SDave Chinner rval = 0; 19134dcb8869SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, old.br_startoff, 19144dcb8869SChristoph Hellwig old.br_startblock, 19154dcb8869SChristoph Hellwig old.br_blockcount, &i); 191630f712c9SDave Chinner if (error) 191730f712c9SDave Chinner goto done; 1918c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1919a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &RIGHT); 192030f712c9SDave Chinner if (error) 192130f712c9SDave Chinner goto done; 192230f712c9SDave Chinner } 192330f712c9SDave Chinner 19244dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 192530f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 192630f712c9SDave Chinner startblockval(PREV.br_startblock)); 19274dcb8869SChristoph Hellwig 192830f712c9SDave Chinner trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 19294dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 19304dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 19314dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &PREV); 193230f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 193330f712c9SDave Chinner 193430f712c9SDave Chinner bma->idx++; 193530f712c9SDave Chinner break; 193630f712c9SDave Chinner 193730f712c9SDave Chinner case BMAP_RIGHT_FILLING: 193830f712c9SDave Chinner /* 193930f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 194030f712c9SDave Chinner * The right neighbor is not contiguous. 194130f712c9SDave Chinner */ 194230f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); 194360b4984fSDarrick J. Wong (*nextents)++; 194430f712c9SDave Chinner if (bma->cur == NULL) 194530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 194630f712c9SDave Chinner else { 194730f712c9SDave Chinner rval = XFS_ILOG_CORE; 194830f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 194930f712c9SDave Chinner new->br_startblock, new->br_blockcount, 195030f712c9SDave Chinner &i); 195130f712c9SDave Chinner if (error) 195230f712c9SDave Chinner goto done; 1953c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 195430f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 195530f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 195630f712c9SDave Chinner if (error) 195730f712c9SDave Chinner goto done; 1958c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 195930f712c9SDave Chinner } 196030f712c9SDave Chinner 19616d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 196230f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 19632c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 1, 19646d3eb1ecSDarrick J. Wong &tmp_rval, whichfork); 196530f712c9SDave Chinner rval |= tmp_rval; 196630f712c9SDave Chinner if (error) 196730f712c9SDave Chinner goto done; 196830f712c9SDave Chinner } 19694dcb8869SChristoph Hellwig 19704dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 197130f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 197230f712c9SDave Chinner startblockval(PREV.br_startblock) - 197330f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 19744dcb8869SChristoph Hellwig 19754dcb8869SChristoph Hellwig trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); 19764dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 19774dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 19784dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &PREV); 197930f712c9SDave Chinner trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 198030f712c9SDave Chinner 198130f712c9SDave Chinner bma->idx++; 198230f712c9SDave Chinner break; 198330f712c9SDave Chinner 198430f712c9SDave Chinner case 0: 198530f712c9SDave Chinner /* 198630f712c9SDave Chinner * Filling in the middle part of a previous delayed allocation. 198730f712c9SDave Chinner * Contiguity is impossible here. 198830f712c9SDave Chinner * This case is avoided almost all the time. 198930f712c9SDave Chinner * 199030f712c9SDave Chinner * We start with a delayed allocation: 199130f712c9SDave Chinner * 199230f712c9SDave Chinner * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ 199330f712c9SDave Chinner * PREV @ idx 199430f712c9SDave Chinner * 199530f712c9SDave Chinner * and we are allocating: 199630f712c9SDave Chinner * +rrrrrrrrrrrrrrrrr+ 199730f712c9SDave Chinner * new 199830f712c9SDave Chinner * 199930f712c9SDave Chinner * and we set it up for insertion as: 200030f712c9SDave Chinner * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ 200130f712c9SDave Chinner * new 200230f712c9SDave Chinner * PREV @ idx LEFT RIGHT 200330f712c9SDave Chinner * inserted at idx + 1 200430f712c9SDave Chinner */ 20054dcb8869SChristoph Hellwig old = PREV; 20064dcb8869SChristoph Hellwig 20074dcb8869SChristoph Hellwig /* LEFT is the new middle */ 200830f712c9SDave Chinner LEFT = *new; 20094dcb8869SChristoph Hellwig 20104dcb8869SChristoph Hellwig /* RIGHT is the new right */ 201130f712c9SDave Chinner RIGHT.br_state = PREV.br_state; 201230f712c9SDave Chinner RIGHT.br_startoff = new_endoff; 20134dcb8869SChristoph Hellwig RIGHT.br_blockcount = 20144dcb8869SChristoph Hellwig PREV.br_startoff + PREV.br_blockcount - new_endoff; 20154dcb8869SChristoph Hellwig RIGHT.br_startblock = 20164dcb8869SChristoph Hellwig nullstartblock(xfs_bmap_worst_indlen(bma->ip, 20174dcb8869SChristoph Hellwig RIGHT.br_blockcount)); 20184dcb8869SChristoph Hellwig 20194dcb8869SChristoph Hellwig /* truncate PREV */ 20204dcb8869SChristoph Hellwig trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); 20214dcb8869SChristoph Hellwig PREV.br_blockcount = new->br_startoff - PREV.br_startoff; 20224dcb8869SChristoph Hellwig PREV.br_startblock = 20234dcb8869SChristoph Hellwig nullstartblock(xfs_bmap_worst_indlen(bma->ip, 20244dcb8869SChristoph Hellwig PREV.br_blockcount)); 20254dcb8869SChristoph Hellwig xfs_iext_update_extent(ifp, bma->idx, &PREV); 20264dcb8869SChristoph Hellwig trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); 20274dcb8869SChristoph Hellwig 202830f712c9SDave Chinner /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ 202930f712c9SDave Chinner xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); 203060b4984fSDarrick J. Wong (*nextents)++; 20314dcb8869SChristoph Hellwig 203230f712c9SDave Chinner if (bma->cur == NULL) 203330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 203430f712c9SDave Chinner else { 203530f712c9SDave Chinner rval = XFS_ILOG_CORE; 203630f712c9SDave Chinner error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, 203730f712c9SDave Chinner new->br_startblock, new->br_blockcount, 203830f712c9SDave Chinner &i); 203930f712c9SDave Chinner if (error) 204030f712c9SDave Chinner goto done; 2041c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 204230f712c9SDave Chinner bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; 204330f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 204430f712c9SDave Chinner if (error) 204530f712c9SDave Chinner goto done; 2046c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 204730f712c9SDave Chinner } 204830f712c9SDave Chinner 20496d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 205030f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 20512c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 20526d3eb1ecSDarrick J. Wong 1, &tmp_rval, whichfork); 205330f712c9SDave Chinner rval |= tmp_rval; 205430f712c9SDave Chinner if (error) 205530f712c9SDave Chinner goto done; 205630f712c9SDave Chinner } 20574dcb8869SChristoph Hellwig 20584dcb8869SChristoph Hellwig da_new = startblockval(PREV.br_startblock) + 20594dcb8869SChristoph Hellwig startblockval(RIGHT.br_startblock); 206030f712c9SDave Chinner bma->idx++; 206130f712c9SDave Chinner break; 206230f712c9SDave Chinner 206330f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 206430f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 206530f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 206630f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 206730f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 206830f712c9SDave Chinner case BMAP_LEFT_CONTIG: 206930f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 207030f712c9SDave Chinner /* 207130f712c9SDave Chinner * These cases are all impossible. 207230f712c9SDave Chinner */ 207330f712c9SDave Chinner ASSERT(0); 207430f712c9SDave Chinner } 207530f712c9SDave Chinner 20769c194644SDarrick J. Wong /* add reverse mapping */ 20779c194644SDarrick J. Wong error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); 20789c194644SDarrick J. Wong if (error) 20799c194644SDarrick J. Wong goto done; 20809c194644SDarrick J. Wong 208130f712c9SDave Chinner /* convert to a btree if necessary */ 20826d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 208330f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 208430f712c9SDave Chinner 208530f712c9SDave Chinner ASSERT(bma->cur == NULL); 208630f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 20872c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 20886d3eb1ecSDarrick J. Wong da_old > 0, &tmp_logflags, whichfork); 208930f712c9SDave Chinner bma->logflags |= tmp_logflags; 209030f712c9SDave Chinner if (error) 209130f712c9SDave Chinner goto done; 209230f712c9SDave Chinner } 209330f712c9SDave Chinner 2094ca1862b0SChristoph Hellwig if (bma->cur) { 2095ca1862b0SChristoph Hellwig da_new += bma->cur->bc_private.b.allocated; 2096ca1862b0SChristoph Hellwig bma->cur->bc_private.b.allocated = 0; 209730f712c9SDave Chinner } 209830f712c9SDave Chinner 2099ca1862b0SChristoph Hellwig /* adjust for changes in reserved delayed indirect blocks */ 2100ca1862b0SChristoph Hellwig if (da_new != da_old) { 2101ca1862b0SChristoph Hellwig ASSERT(state == 0 || da_new < da_old); 2102ca1862b0SChristoph Hellwig error = xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), 2103ca1862b0SChristoph Hellwig false); 2104ca1862b0SChristoph Hellwig } 210530f712c9SDave Chinner 21066d3eb1ecSDarrick J. Wong xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); 210730f712c9SDave Chinner done: 210860b4984fSDarrick J. Wong if (whichfork != XFS_COW_FORK) 210930f712c9SDave Chinner bma->logflags |= rval; 211030f712c9SDave Chinner return error; 211130f712c9SDave Chinner #undef LEFT 211230f712c9SDave Chinner #undef RIGHT 211330f712c9SDave Chinner #undef PREV 211430f712c9SDave Chinner } 211530f712c9SDave Chinner 211630f712c9SDave Chinner /* 211730f712c9SDave Chinner * Convert an unwritten allocation to a real allocation or vice versa. 211830f712c9SDave Chinner */ 211930f712c9SDave Chinner STATIC int /* error */ 212030f712c9SDave Chinner xfs_bmap_add_extent_unwritten_real( 212130f712c9SDave Chinner struct xfs_trans *tp, 212230f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 212305a630d7SDarrick J. Wong int whichfork, 212430f712c9SDave Chinner xfs_extnum_t *idx, /* extent number to update/insert */ 212530f712c9SDave Chinner xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ 212630f712c9SDave Chinner xfs_bmbt_irec_t *new, /* new data to add to file extents */ 212730f712c9SDave Chinner xfs_fsblock_t *first, /* pointer to firstblock variable */ 21282c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* list of extents to be freed */ 212930f712c9SDave Chinner int *logflagsp) /* inode logging flags */ 213030f712c9SDave Chinner { 213130f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 213230f712c9SDave Chinner int error; /* error return value */ 213330f712c9SDave Chinner int i; /* temp state */ 213430f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 213530f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 213630f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 213730f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 213830f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 213930f712c9SDave Chinner int state = 0;/* state bits, accessed thru macros */ 214005a630d7SDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 214179fa6143SChristoph Hellwig struct xfs_bmbt_irec old; 214230f712c9SDave Chinner 214330f712c9SDave Chinner *logflagsp = 0; 214430f712c9SDave Chinner 214530f712c9SDave Chinner cur = *curp; 214605a630d7SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 214705a630d7SDarrick J. Wong if (whichfork == XFS_COW_FORK) 214805a630d7SDarrick J. Wong state |= BMAP_COWFORK; 214930f712c9SDave Chinner 215030f712c9SDave Chinner ASSERT(*idx >= 0); 21515d829300SEric Sandeen ASSERT(*idx <= xfs_iext_count(ifp)); 215230f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 215330f712c9SDave Chinner 2154ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 215530f712c9SDave Chinner 215630f712c9SDave Chinner #define LEFT r[0] 215730f712c9SDave Chinner #define RIGHT r[1] 215830f712c9SDave Chinner #define PREV r[2] 215930f712c9SDave Chinner 216030f712c9SDave Chinner /* 216130f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 216230f712c9SDave Chinner */ 216330f712c9SDave Chinner error = 0; 216479fa6143SChristoph Hellwig xfs_iext_get_extent(ifp, *idx, &PREV); 216579fa6143SChristoph Hellwig ASSERT(new->br_state != PREV.br_state); 216630f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 216730f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 216830f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 216930f712c9SDave Chinner 217030f712c9SDave Chinner /* 217130f712c9SDave Chinner * Set flags determining what part of the previous oldext allocation 217230f712c9SDave Chinner * extent is being replaced by a newext allocation. 217330f712c9SDave Chinner */ 217430f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 217530f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 217630f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 217730f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 217830f712c9SDave Chinner 217930f712c9SDave Chinner /* 218030f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 218130f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 218230f712c9SDave Chinner */ 218330f712c9SDave Chinner if (*idx > 0) { 218430f712c9SDave Chinner state |= BMAP_LEFT_VALID; 2185e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, *idx - 1, &LEFT); 218630f712c9SDave Chinner 218730f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 218830f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 218930f712c9SDave Chinner } 219030f712c9SDave Chinner 219130f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 219230f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 219330f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 219479fa6143SChristoph Hellwig LEFT.br_state == new->br_state && 219530f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 219630f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 219730f712c9SDave Chinner 219830f712c9SDave Chinner /* 219930f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 220030f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 220130f712c9SDave Chinner * Also check for all-three-contiguous being too large. 220230f712c9SDave Chinner */ 220305a630d7SDarrick J. Wong if (*idx < xfs_iext_count(ifp) - 1) { 220430f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 2205e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, *idx + 1, &RIGHT); 220630f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 220730f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 220830f712c9SDave Chinner } 220930f712c9SDave Chinner 221030f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 221130f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 221230f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 221379fa6143SChristoph Hellwig new->br_state == RIGHT.br_state && 221430f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 221530f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 221630f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 221730f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 221830f712c9SDave Chinner BMAP_RIGHT_FILLING) || 221930f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 222030f712c9SDave Chinner <= MAXEXTLEN)) 222130f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 222230f712c9SDave Chinner 222330f712c9SDave Chinner /* 222430f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 222530f712c9SDave Chinner */ 222630f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 222730f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 222830f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 222930f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 223030f712c9SDave Chinner /* 223130f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 223230f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 223330f712c9SDave Chinner */ 223430f712c9SDave Chinner --*idx; 223530f712c9SDave Chinner 223630f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 223779fa6143SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; 223879fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &LEFT); 223930f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 224030f712c9SDave Chinner 224130f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 2, state); 224205a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 224305a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 2); 224430f712c9SDave Chinner if (cur == NULL) 224530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 224630f712c9SDave Chinner else { 224730f712c9SDave Chinner rval = XFS_ILOG_CORE; 224830f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, 224930f712c9SDave Chinner RIGHT.br_startblock, 225030f712c9SDave Chinner RIGHT.br_blockcount, &i))) 225130f712c9SDave Chinner goto done; 2252c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 225330f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 225430f712c9SDave Chinner goto done; 2255c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 225630f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 225730f712c9SDave Chinner goto done; 2258c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 225930f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 226030f712c9SDave Chinner goto done; 2261c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 226230f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 226330f712c9SDave Chinner goto done; 2264c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2265a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 226679fa6143SChristoph Hellwig if (error) 226730f712c9SDave Chinner goto done; 226830f712c9SDave Chinner } 226930f712c9SDave Chinner break; 227030f712c9SDave Chinner 227130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 227230f712c9SDave Chinner /* 227330f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 227430f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 227530f712c9SDave Chinner */ 227630f712c9SDave Chinner --*idx; 227730f712c9SDave Chinner 227830f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 227979fa6143SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount; 228079fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &LEFT); 228130f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 228230f712c9SDave Chinner 228330f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 1, state); 228405a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 228505a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 228630f712c9SDave Chinner if (cur == NULL) 228730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 228830f712c9SDave Chinner else { 228930f712c9SDave Chinner rval = XFS_ILOG_CORE; 229030f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, 229130f712c9SDave Chinner PREV.br_startblock, PREV.br_blockcount, 229230f712c9SDave Chinner &i))) 229330f712c9SDave Chinner goto done; 2294c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 229530f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 229630f712c9SDave Chinner goto done; 2297c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 229830f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 229930f712c9SDave Chinner goto done; 2300c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2301a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 230279fa6143SChristoph Hellwig if (error) 230330f712c9SDave Chinner goto done; 230430f712c9SDave Chinner } 230530f712c9SDave Chinner break; 230630f712c9SDave Chinner 230730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 230830f712c9SDave Chinner /* 230930f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 231030f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 231130f712c9SDave Chinner */ 231230f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 231379fa6143SChristoph Hellwig PREV.br_blockcount += RIGHT.br_blockcount; 231479fa6143SChristoph Hellwig PREV.br_state = new->br_state; 231579fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 231630f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 231779fa6143SChristoph Hellwig 231830f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 1, state); 231905a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 232005a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 232130f712c9SDave Chinner if (cur == NULL) 232230f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 232330f712c9SDave Chinner else { 232430f712c9SDave Chinner rval = XFS_ILOG_CORE; 232530f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, 232630f712c9SDave Chinner RIGHT.br_startblock, 232730f712c9SDave Chinner RIGHT.br_blockcount, &i))) 232830f712c9SDave Chinner goto done; 2329c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 233030f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 233130f712c9SDave Chinner goto done; 2332c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 233330f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 233430f712c9SDave Chinner goto done; 2335c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2336a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 233779fa6143SChristoph Hellwig if (error) 233830f712c9SDave Chinner goto done; 233930f712c9SDave Chinner } 234030f712c9SDave Chinner break; 234130f712c9SDave Chinner 234230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 234330f712c9SDave Chinner /* 234430f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 234530f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 234630f712c9SDave Chinner * the new one. 234730f712c9SDave Chinner */ 234830f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 234979fa6143SChristoph Hellwig PREV.br_state = new->br_state; 235079fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 235130f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 235230f712c9SDave Chinner 235330f712c9SDave Chinner if (cur == NULL) 235430f712c9SDave Chinner rval = XFS_ILOG_DEXT; 235530f712c9SDave Chinner else { 235630f712c9SDave Chinner rval = 0; 235730f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, 235830f712c9SDave Chinner new->br_startblock, new->br_blockcount, 235930f712c9SDave Chinner &i))) 236030f712c9SDave Chinner goto done; 2361c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2362a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 236379fa6143SChristoph Hellwig if (error) 236430f712c9SDave Chinner goto done; 236530f712c9SDave Chinner } 236630f712c9SDave Chinner break; 236730f712c9SDave Chinner 236830f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 236930f712c9SDave Chinner /* 237030f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 237130f712c9SDave Chinner * The left neighbor is contiguous. 237230f712c9SDave Chinner */ 237330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_); 237479fa6143SChristoph Hellwig LEFT.br_blockcount += new->br_blockcount; 237579fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx - 1, &LEFT); 237630f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_); 237730f712c9SDave Chinner 237879fa6143SChristoph Hellwig old = PREV; 237930f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 238079fa6143SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 238179fa6143SChristoph Hellwig PREV.br_startblock += new->br_blockcount; 238279fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 238379fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 238430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 238530f712c9SDave Chinner 238630f712c9SDave Chinner --*idx; 238730f712c9SDave Chinner 238830f712c9SDave Chinner if (cur == NULL) 238930f712c9SDave Chinner rval = XFS_ILOG_DEXT; 239030f712c9SDave Chinner else { 239130f712c9SDave Chinner rval = 0; 239279fa6143SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 239379fa6143SChristoph Hellwig old.br_startblock, old.br_blockcount, 239479fa6143SChristoph Hellwig &i); 239579fa6143SChristoph Hellwig if (error) 239630f712c9SDave Chinner goto done; 2397c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2398a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 239979fa6143SChristoph Hellwig if (error) 240030f712c9SDave Chinner goto done; 240179fa6143SChristoph Hellwig error = xfs_btree_decrement(cur, 0, &i); 240279fa6143SChristoph Hellwig if (error) 240330f712c9SDave Chinner goto done; 2404a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 240530f712c9SDave Chinner if (error) 240630f712c9SDave Chinner goto done; 240730f712c9SDave Chinner } 240830f712c9SDave Chinner break; 240930f712c9SDave Chinner 241030f712c9SDave Chinner case BMAP_LEFT_FILLING: 241130f712c9SDave Chinner /* 241230f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 241330f712c9SDave Chinner * The left neighbor is not contiguous. 241430f712c9SDave Chinner */ 241579fa6143SChristoph Hellwig old = PREV; 241630f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 241779fa6143SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 241879fa6143SChristoph Hellwig PREV.br_startblock += new->br_blockcount; 241979fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 242079fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 242130f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 242230f712c9SDave Chinner 242330f712c9SDave Chinner xfs_iext_insert(ip, *idx, 1, new, state); 242405a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 242505a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 242630f712c9SDave Chinner if (cur == NULL) 242730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 242830f712c9SDave Chinner else { 242930f712c9SDave Chinner rval = XFS_ILOG_CORE; 243079fa6143SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 243179fa6143SChristoph Hellwig old.br_startblock, old.br_blockcount, 243279fa6143SChristoph Hellwig &i); 243379fa6143SChristoph Hellwig if (error) 243430f712c9SDave Chinner goto done; 2435c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2436a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 243779fa6143SChristoph Hellwig if (error) 243830f712c9SDave Chinner goto done; 243930f712c9SDave Chinner cur->bc_rec.b = *new; 244030f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 244130f712c9SDave Chinner goto done; 2442c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 244330f712c9SDave Chinner } 244430f712c9SDave Chinner break; 244530f712c9SDave Chinner 244630f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 244730f712c9SDave Chinner /* 244830f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 244930f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 245030f712c9SDave Chinner */ 245179fa6143SChristoph Hellwig old = PREV; 245230f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 245379fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 245479fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 245530f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 245630f712c9SDave Chinner 245730f712c9SDave Chinner ++*idx; 245830f712c9SDave Chinner 245930f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 246079fa6143SChristoph Hellwig RIGHT.br_startoff = new->br_startoff; 246179fa6143SChristoph Hellwig RIGHT.br_startblock = new->br_startblock; 246279fa6143SChristoph Hellwig RIGHT.br_blockcount += new->br_blockcount; 246379fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &RIGHT); 246430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 246530f712c9SDave Chinner 246630f712c9SDave Chinner if (cur == NULL) 246730f712c9SDave Chinner rval = XFS_ILOG_DEXT; 246830f712c9SDave Chinner else { 246930f712c9SDave Chinner rval = 0; 247079fa6143SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 247179fa6143SChristoph Hellwig old.br_startblock, old.br_blockcount, 247279fa6143SChristoph Hellwig &i); 247379fa6143SChristoph Hellwig if (error) 247430f712c9SDave Chinner goto done; 2475c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2476a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 247779fa6143SChristoph Hellwig if (error) 247830f712c9SDave Chinner goto done; 247979fa6143SChristoph Hellwig error = xfs_btree_increment(cur, 0, &i); 248079fa6143SChristoph Hellwig if (error) 248130f712c9SDave Chinner goto done; 2482a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &RIGHT); 248379fa6143SChristoph Hellwig if (error) 248430f712c9SDave Chinner goto done; 248530f712c9SDave Chinner } 248630f712c9SDave Chinner break; 248730f712c9SDave Chinner 248830f712c9SDave Chinner case BMAP_RIGHT_FILLING: 248930f712c9SDave Chinner /* 249030f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 249130f712c9SDave Chinner * The right neighbor is not contiguous. 249230f712c9SDave Chinner */ 249379fa6143SChristoph Hellwig old = PREV; 249430f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 249579fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 249679fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 249730f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 249830f712c9SDave Chinner 249930f712c9SDave Chinner ++*idx; 250030f712c9SDave Chinner xfs_iext_insert(ip, *idx, 1, new, state); 250130f712c9SDave Chinner 250205a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 250305a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 250430f712c9SDave Chinner if (cur == NULL) 250530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 250630f712c9SDave Chinner else { 250730f712c9SDave Chinner rval = XFS_ILOG_CORE; 250879fa6143SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 250979fa6143SChristoph Hellwig old.br_startblock, old.br_blockcount, 251079fa6143SChristoph Hellwig &i); 251179fa6143SChristoph Hellwig if (error) 251230f712c9SDave Chinner goto done; 2513c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2514a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 251579fa6143SChristoph Hellwig if (error) 251630f712c9SDave Chinner goto done; 251730f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, 251830f712c9SDave Chinner new->br_startblock, new->br_blockcount, 251930f712c9SDave Chinner &i))) 252030f712c9SDave Chinner goto done; 2521c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 25225e422f5eSChristoph Hellwig cur->bc_rec.b.br_state = new->br_state; 252330f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 252430f712c9SDave Chinner goto done; 2525c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 252630f712c9SDave Chinner } 252730f712c9SDave Chinner break; 252830f712c9SDave Chinner 252930f712c9SDave Chinner case 0: 253030f712c9SDave Chinner /* 253130f712c9SDave Chinner * Setting the middle part of a previous oldext extent to 253230f712c9SDave Chinner * newext. Contiguity is impossible here. 253330f712c9SDave Chinner * One extent becomes three extents. 253430f712c9SDave Chinner */ 253579fa6143SChristoph Hellwig old = PREV; 253630f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 253779fa6143SChristoph Hellwig PREV.br_blockcount = new->br_startoff - PREV.br_startoff; 253879fa6143SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &PREV); 253930f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 254030f712c9SDave Chinner 254130f712c9SDave Chinner r[0] = *new; 254230f712c9SDave Chinner r[1].br_startoff = new_endoff; 254330f712c9SDave Chinner r[1].br_blockcount = 254479fa6143SChristoph Hellwig old.br_startoff + old.br_blockcount - new_endoff; 254530f712c9SDave Chinner r[1].br_startblock = new->br_startblock + new->br_blockcount; 254679fa6143SChristoph Hellwig r[1].br_state = PREV.br_state; 254730f712c9SDave Chinner 254830f712c9SDave Chinner ++*idx; 254930f712c9SDave Chinner xfs_iext_insert(ip, *idx, 2, &r[0], state); 255030f712c9SDave Chinner 255105a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 255205a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 2); 255330f712c9SDave Chinner if (cur == NULL) 255430f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 255530f712c9SDave Chinner else { 255630f712c9SDave Chinner rval = XFS_ILOG_CORE; 255779fa6143SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 255879fa6143SChristoph Hellwig old.br_startblock, old.br_blockcount, 255979fa6143SChristoph Hellwig &i); 256079fa6143SChristoph Hellwig if (error) 256130f712c9SDave Chinner goto done; 2562c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 256330f712c9SDave Chinner /* new right extent - oldext */ 2564a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &r[1]); 2565a67d00a5SChristoph Hellwig if (error) 256630f712c9SDave Chinner goto done; 256730f712c9SDave Chinner /* new left extent - oldext */ 256830f712c9SDave Chinner cur->bc_rec.b = PREV; 256930f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 257030f712c9SDave Chinner goto done; 2571c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 257230f712c9SDave Chinner /* 257330f712c9SDave Chinner * Reset the cursor to the position of the new extent 257430f712c9SDave Chinner * we are about to insert as we can't trust it after 257530f712c9SDave Chinner * the previous insert. 257630f712c9SDave Chinner */ 257730f712c9SDave Chinner if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, 257830f712c9SDave Chinner new->br_startblock, new->br_blockcount, 257930f712c9SDave Chinner &i))) 258030f712c9SDave Chinner goto done; 2581c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 258230f712c9SDave Chinner /* new middle extent - newext */ 258330f712c9SDave Chinner cur->bc_rec.b.br_state = new->br_state; 258430f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 258530f712c9SDave Chinner goto done; 2586c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 258730f712c9SDave Chinner } 258830f712c9SDave Chinner break; 258930f712c9SDave Chinner 259030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 259130f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 259230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 259330f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 259430f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 259530f712c9SDave Chinner case BMAP_LEFT_CONTIG: 259630f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 259730f712c9SDave Chinner /* 259830f712c9SDave Chinner * These cases are all impossible. 259930f712c9SDave Chinner */ 260030f712c9SDave Chinner ASSERT(0); 260130f712c9SDave Chinner } 260230f712c9SDave Chinner 26039c194644SDarrick J. Wong /* update reverse mappings */ 260405a630d7SDarrick J. Wong error = xfs_rmap_convert_extent(mp, dfops, ip, whichfork, new); 26059c194644SDarrick J. Wong if (error) 26069c194644SDarrick J. Wong goto done; 26079c194644SDarrick J. Wong 260830f712c9SDave Chinner /* convert to a btree if necessary */ 260905a630d7SDarrick J. Wong if (xfs_bmap_needs_btree(ip, whichfork)) { 261030f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 261130f712c9SDave Chinner 261230f712c9SDave Chinner ASSERT(cur == NULL); 26132c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, &cur, 261405a630d7SDarrick J. Wong 0, &tmp_logflags, whichfork); 261530f712c9SDave Chinner *logflagsp |= tmp_logflags; 261630f712c9SDave Chinner if (error) 261730f712c9SDave Chinner goto done; 261830f712c9SDave Chinner } 261930f712c9SDave Chinner 262030f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 262130f712c9SDave Chinner if (cur) { 262230f712c9SDave Chinner cur->bc_private.b.allocated = 0; 262330f712c9SDave Chinner *curp = cur; 262430f712c9SDave Chinner } 262530f712c9SDave Chinner 262605a630d7SDarrick J. Wong xfs_bmap_check_leaf_extents(*curp, ip, whichfork); 262730f712c9SDave Chinner done: 262830f712c9SDave Chinner *logflagsp |= rval; 262930f712c9SDave Chinner return error; 263030f712c9SDave Chinner #undef LEFT 263130f712c9SDave Chinner #undef RIGHT 263230f712c9SDave Chinner #undef PREV 263330f712c9SDave Chinner } 263430f712c9SDave Chinner 263530f712c9SDave Chinner /* 263630f712c9SDave Chinner * Convert a hole to a delayed allocation. 263730f712c9SDave Chinner */ 263830f712c9SDave Chinner STATIC void 263930f712c9SDave Chinner xfs_bmap_add_extent_hole_delay( 264030f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 2641be51f811SDarrick J. Wong int whichfork, 264230f712c9SDave Chinner xfs_extnum_t *idx, /* extent number to update/insert */ 264330f712c9SDave Chinner xfs_bmbt_irec_t *new) /* new data to add to file extents */ 264430f712c9SDave Chinner { 264530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 264630f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 264730f712c9SDave Chinner xfs_filblks_t newlen=0; /* new indirect size */ 264830f712c9SDave Chinner xfs_filblks_t oldlen=0; /* old indirect size */ 264930f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 265030f712c9SDave Chinner int state; /* state bits, accessed thru macros */ 26513ffc18ecSChristoph Hellwig xfs_filblks_t temp; /* temp for indirect calculations */ 265230f712c9SDave Chinner 2653be51f811SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 265430f712c9SDave Chinner state = 0; 2655be51f811SDarrick J. Wong if (whichfork == XFS_COW_FORK) 2656be51f811SDarrick J. Wong state |= BMAP_COWFORK; 265730f712c9SDave Chinner ASSERT(isnullstartblock(new->br_startblock)); 265830f712c9SDave Chinner 265930f712c9SDave Chinner /* 266030f712c9SDave Chinner * Check and set flags if this segment has a left neighbor 266130f712c9SDave Chinner */ 266230f712c9SDave Chinner if (*idx > 0) { 266330f712c9SDave Chinner state |= BMAP_LEFT_VALID; 2664e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, *idx - 1, &left); 266530f712c9SDave Chinner 266630f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 266730f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 266830f712c9SDave Chinner } 266930f712c9SDave Chinner 267030f712c9SDave Chinner /* 267130f712c9SDave Chinner * Check and set flags if the current (right) segment exists. 267230f712c9SDave Chinner * If it doesn't exist, we're converting the hole at end-of-file. 267330f712c9SDave Chinner */ 26745d829300SEric Sandeen if (*idx < xfs_iext_count(ifp)) { 267530f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 2676e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, *idx, &right); 267730f712c9SDave Chinner 267830f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 267930f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 268030f712c9SDave Chinner } 268130f712c9SDave Chinner 268230f712c9SDave Chinner /* 268330f712c9SDave Chinner * Set contiguity flags on the left and right neighbors. 268430f712c9SDave Chinner * Don't let extents get too large, even if the pieces are contiguous. 268530f712c9SDave Chinner */ 268630f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && 268730f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 268830f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 268930f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 269030f712c9SDave Chinner 269130f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && 269230f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 269330f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 269430f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 269530f712c9SDave Chinner (left.br_blockcount + new->br_blockcount + 269630f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN))) 269730f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 269830f712c9SDave Chinner 269930f712c9SDave Chinner /* 270030f712c9SDave Chinner * Switch out based on the contiguity flags. 270130f712c9SDave Chinner */ 270230f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 270330f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 270430f712c9SDave Chinner /* 270530f712c9SDave Chinner * New allocation is contiguous with delayed allocations 270630f712c9SDave Chinner * on the left and on the right. 270730f712c9SDave Chinner * Merge all three into a single extent record. 270830f712c9SDave Chinner */ 270930f712c9SDave Chinner --*idx; 271030f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount + 271130f712c9SDave Chinner right.br_blockcount; 271230f712c9SDave Chinner 271330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 271430f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 271530f712c9SDave Chinner startblockval(new->br_startblock) + 271630f712c9SDave Chinner startblockval(right.br_startblock); 27170e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 27180e339ef8SBrian Foster oldlen); 27193ffc18ecSChristoph Hellwig left.br_startblock = nullstartblock(newlen); 27203ffc18ecSChristoph Hellwig left.br_blockcount = temp; 27213ffc18ecSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &left); 272230f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 272330f712c9SDave Chinner 272430f712c9SDave Chinner xfs_iext_remove(ip, *idx + 1, 1, state); 272530f712c9SDave Chinner break; 272630f712c9SDave Chinner 272730f712c9SDave Chinner case BMAP_LEFT_CONTIG: 272830f712c9SDave Chinner /* 272930f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 273030f712c9SDave Chinner * on the left. 273130f712c9SDave Chinner * Merge the new allocation with the left neighbor. 273230f712c9SDave Chinner */ 273330f712c9SDave Chinner --*idx; 273430f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount; 273530f712c9SDave Chinner 273630f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 273730f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 273830f712c9SDave Chinner startblockval(new->br_startblock); 27390e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 27400e339ef8SBrian Foster oldlen); 27413ffc18ecSChristoph Hellwig left.br_blockcount = temp; 27423ffc18ecSChristoph Hellwig left.br_startblock = nullstartblock(newlen); 27433ffc18ecSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &left); 274430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 274530f712c9SDave Chinner break; 274630f712c9SDave Chinner 274730f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 274830f712c9SDave Chinner /* 274930f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 275030f712c9SDave Chinner * on the right. 275130f712c9SDave Chinner * Merge the new allocation with the right neighbor. 275230f712c9SDave Chinner */ 275330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 275430f712c9SDave Chinner temp = new->br_blockcount + right.br_blockcount; 275530f712c9SDave Chinner oldlen = startblockval(new->br_startblock) + 275630f712c9SDave Chinner startblockval(right.br_startblock); 27570e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 27580e339ef8SBrian Foster oldlen); 27593ffc18ecSChristoph Hellwig right.br_startoff = new->br_startoff; 27603ffc18ecSChristoph Hellwig right.br_startblock = nullstartblock(newlen); 27613ffc18ecSChristoph Hellwig right.br_blockcount = temp; 27623ffc18ecSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &right); 276330f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 276430f712c9SDave Chinner break; 276530f712c9SDave Chinner 276630f712c9SDave Chinner case 0: 276730f712c9SDave Chinner /* 276830f712c9SDave Chinner * New allocation is not contiguous with another 276930f712c9SDave Chinner * delayed allocation. 277030f712c9SDave Chinner * Insert a new entry. 277130f712c9SDave Chinner */ 277230f712c9SDave Chinner oldlen = newlen = 0; 277330f712c9SDave Chinner xfs_iext_insert(ip, *idx, 1, new, state); 277430f712c9SDave Chinner break; 277530f712c9SDave Chinner } 277630f712c9SDave Chinner if (oldlen != newlen) { 277730f712c9SDave Chinner ASSERT(oldlen > newlen); 27780d485adaSDave Chinner xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), 27790d485adaSDave Chinner false); 278030f712c9SDave Chinner /* 278130f712c9SDave Chinner * Nothing to do for disk quota accounting here. 278230f712c9SDave Chinner */ 278330f712c9SDave Chinner } 278430f712c9SDave Chinner } 278530f712c9SDave Chinner 278630f712c9SDave Chinner /* 278730f712c9SDave Chinner * Convert a hole to a real allocation. 278830f712c9SDave Chinner */ 278930f712c9SDave Chinner STATIC int /* error */ 279030f712c9SDave Chinner xfs_bmap_add_extent_hole_real( 27916d04558fSChristoph Hellwig struct xfs_trans *tp, 27926d04558fSChristoph Hellwig struct xfs_inode *ip, 27936d04558fSChristoph Hellwig int whichfork, 27946d04558fSChristoph Hellwig xfs_extnum_t *idx, 27956d04558fSChristoph Hellwig struct xfs_btree_cur **curp, 27966d04558fSChristoph Hellwig struct xfs_bmbt_irec *new, 27976d04558fSChristoph Hellwig xfs_fsblock_t *first, 27986d04558fSChristoph Hellwig struct xfs_defer_ops *dfops, 27996d04558fSChristoph Hellwig int *logflagsp) 280030f712c9SDave Chinner { 28016d04558fSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 28026d04558fSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 28036d04558fSChristoph Hellwig struct xfs_btree_cur *cur = *curp; 280430f712c9SDave Chinner int error; /* error return value */ 280530f712c9SDave Chinner int i; /* temp state */ 280630f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 280730f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 280830f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 280930f712c9SDave Chinner int state; /* state bits, accessed thru macros */ 28101abb9e55SChristoph Hellwig struct xfs_bmbt_irec old; 281130f712c9SDave Chinner 28126d04558fSChristoph Hellwig ASSERT(*idx >= 0); 28136d04558fSChristoph Hellwig ASSERT(*idx <= xfs_iext_count(ifp)); 281430f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 28156d04558fSChristoph Hellwig ASSERT(!cur || !(cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); 281630f712c9SDave Chinner 2817ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 281830f712c9SDave Chinner 281930f712c9SDave Chinner state = 0; 282030f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK) 282130f712c9SDave Chinner state |= BMAP_ATTRFORK; 2822a14234c7SChristoph Hellwig if (whichfork == XFS_COW_FORK) 2823a14234c7SChristoph Hellwig state |= BMAP_COWFORK; 282430f712c9SDave Chinner 282530f712c9SDave Chinner /* 282630f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 282730f712c9SDave Chinner */ 28286d04558fSChristoph Hellwig if (*idx > 0) { 282930f712c9SDave Chinner state |= BMAP_LEFT_VALID; 2830e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, *idx - 1, &left); 283130f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 283230f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 283330f712c9SDave Chinner } 283430f712c9SDave Chinner 283530f712c9SDave Chinner /* 283630f712c9SDave Chinner * Check and set flags if this segment has a current value. 283730f712c9SDave Chinner * Not true if we're inserting into the "hole" at eof. 283830f712c9SDave Chinner */ 28396d04558fSChristoph Hellwig if (*idx < xfs_iext_count(ifp)) { 284030f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 2841e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, *idx, &right); 284230f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 284330f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 284430f712c9SDave Chinner } 284530f712c9SDave Chinner 284630f712c9SDave Chinner /* 284730f712c9SDave Chinner * We're inserting a real allocation between "left" and "right". 284830f712c9SDave Chinner * Set the contiguity flags. Don't let extents get too large. 284930f712c9SDave Chinner */ 285030f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 285130f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 285230f712c9SDave Chinner left.br_startblock + left.br_blockcount == new->br_startblock && 285330f712c9SDave Chinner left.br_state == new->br_state && 285430f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 285530f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 285630f712c9SDave Chinner 285730f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 285830f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 285930f712c9SDave Chinner new->br_startblock + new->br_blockcount == right.br_startblock && 286030f712c9SDave Chinner new->br_state == right.br_state && 286130f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 286230f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 286330f712c9SDave Chinner left.br_blockcount + new->br_blockcount + 286430f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN)) 286530f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 286630f712c9SDave Chinner 286730f712c9SDave Chinner error = 0; 286830f712c9SDave Chinner /* 286930f712c9SDave Chinner * Select which case we're in here, and implement it. 287030f712c9SDave Chinner */ 287130f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 287230f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 287330f712c9SDave Chinner /* 287430f712c9SDave Chinner * New allocation is contiguous with real allocations on the 287530f712c9SDave Chinner * left and on the right. 287630f712c9SDave Chinner * Merge all three into a single extent record. 287730f712c9SDave Chinner */ 28786d04558fSChristoph Hellwig --*idx; 28796d04558fSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 28801abb9e55SChristoph Hellwig left.br_blockcount += new->br_blockcount + right.br_blockcount; 28811abb9e55SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &left); 28826d04558fSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 288330f712c9SDave Chinner 28846d04558fSChristoph Hellwig xfs_iext_remove(ip, *idx + 1, 1, state); 288530f712c9SDave Chinner 28866d04558fSChristoph Hellwig XFS_IFORK_NEXT_SET(ip, whichfork, 28876d04558fSChristoph Hellwig XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 28886d04558fSChristoph Hellwig if (cur == NULL) { 288930f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 289030f712c9SDave Chinner } else { 289130f712c9SDave Chinner rval = XFS_ILOG_CORE; 28926d04558fSChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, right.br_startoff, 289330f712c9SDave Chinner right.br_startblock, right.br_blockcount, 289430f712c9SDave Chinner &i); 289530f712c9SDave Chinner if (error) 289630f712c9SDave Chinner goto done; 2897c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 28986d04558fSChristoph Hellwig error = xfs_btree_delete(cur, &i); 289930f712c9SDave Chinner if (error) 290030f712c9SDave Chinner goto done; 2901c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 29026d04558fSChristoph Hellwig error = xfs_btree_decrement(cur, 0, &i); 290330f712c9SDave Chinner if (error) 290430f712c9SDave Chinner goto done; 2905c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2906a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &left); 290730f712c9SDave Chinner if (error) 290830f712c9SDave Chinner goto done; 290930f712c9SDave Chinner } 291030f712c9SDave Chinner break; 291130f712c9SDave Chinner 291230f712c9SDave Chinner case BMAP_LEFT_CONTIG: 291330f712c9SDave Chinner /* 291430f712c9SDave Chinner * New allocation is contiguous with a real allocation 291530f712c9SDave Chinner * on the left. 291630f712c9SDave Chinner * Merge the new allocation with the left neighbor. 291730f712c9SDave Chinner */ 29186d04558fSChristoph Hellwig --*idx; 29191abb9e55SChristoph Hellwig old = left; 29206d04558fSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 29211abb9e55SChristoph Hellwig left.br_blockcount += new->br_blockcount; 29221abb9e55SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &left); 29236d04558fSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 292430f712c9SDave Chinner 29256d04558fSChristoph Hellwig if (cur == NULL) { 292630f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 292730f712c9SDave Chinner } else { 292830f712c9SDave Chinner rval = 0; 29291abb9e55SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 29301abb9e55SChristoph Hellwig old.br_startblock, old.br_blockcount, 293130f712c9SDave Chinner &i); 293230f712c9SDave Chinner if (error) 293330f712c9SDave Chinner goto done; 2934c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2935a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &left); 293630f712c9SDave Chinner if (error) 293730f712c9SDave Chinner goto done; 293830f712c9SDave Chinner } 293930f712c9SDave Chinner break; 294030f712c9SDave Chinner 294130f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 294230f712c9SDave Chinner /* 294330f712c9SDave Chinner * New allocation is contiguous with a real allocation 294430f712c9SDave Chinner * on the right. 294530f712c9SDave Chinner * Merge the new allocation with the right neighbor. 294630f712c9SDave Chinner */ 29471abb9e55SChristoph Hellwig old = right; 29486d04558fSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 29491abb9e55SChristoph Hellwig right.br_startoff = new->br_startoff; 29501abb9e55SChristoph Hellwig right.br_startblock = new->br_startblock; 29511abb9e55SChristoph Hellwig right.br_blockcount += new->br_blockcount; 29521abb9e55SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &right); 29536d04558fSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 295430f712c9SDave Chinner 29556d04558fSChristoph Hellwig if (cur == NULL) { 295630f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 295730f712c9SDave Chinner } else { 295830f712c9SDave Chinner rval = 0; 29591abb9e55SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, old.br_startoff, 29601abb9e55SChristoph Hellwig old.br_startblock, old.br_blockcount, 29611abb9e55SChristoph Hellwig &i); 296230f712c9SDave Chinner if (error) 296330f712c9SDave Chinner goto done; 2964c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2965a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &right); 296630f712c9SDave Chinner if (error) 296730f712c9SDave Chinner goto done; 296830f712c9SDave Chinner } 296930f712c9SDave Chinner break; 297030f712c9SDave Chinner 297130f712c9SDave Chinner case 0: 297230f712c9SDave Chinner /* 297330f712c9SDave Chinner * New allocation is not contiguous with another 297430f712c9SDave Chinner * real allocation. 297530f712c9SDave Chinner * Insert a new entry. 297630f712c9SDave Chinner */ 29776d04558fSChristoph Hellwig xfs_iext_insert(ip, *idx, 1, new, state); 29786d04558fSChristoph Hellwig XFS_IFORK_NEXT_SET(ip, whichfork, 29796d04558fSChristoph Hellwig XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 29806d04558fSChristoph Hellwig if (cur == NULL) { 298130f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 298230f712c9SDave Chinner } else { 298330f712c9SDave Chinner rval = XFS_ILOG_CORE; 29846d04558fSChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, 298530f712c9SDave Chinner new->br_startoff, 298630f712c9SDave Chinner new->br_startblock, 298730f712c9SDave Chinner new->br_blockcount, &i); 298830f712c9SDave Chinner if (error) 298930f712c9SDave Chinner goto done; 2990c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 29916d04558fSChristoph Hellwig cur->bc_rec.b.br_state = new->br_state; 29926d04558fSChristoph Hellwig error = xfs_btree_insert(cur, &i); 299330f712c9SDave Chinner if (error) 299430f712c9SDave Chinner goto done; 2995c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 299630f712c9SDave Chinner } 299730f712c9SDave Chinner break; 299830f712c9SDave Chinner } 299930f712c9SDave Chinner 30009c194644SDarrick J. Wong /* add reverse mapping */ 30016d04558fSChristoph Hellwig error = xfs_rmap_map_extent(mp, dfops, ip, whichfork, new); 30029c194644SDarrick J. Wong if (error) 30039c194644SDarrick J. Wong goto done; 30049c194644SDarrick J. Wong 300530f712c9SDave Chinner /* convert to a btree if necessary */ 30066d04558fSChristoph Hellwig if (xfs_bmap_needs_btree(ip, whichfork)) { 300730f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 300830f712c9SDave Chinner 30096d04558fSChristoph Hellwig ASSERT(cur == NULL); 30106d04558fSChristoph Hellwig error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, curp, 301130f712c9SDave Chinner 0, &tmp_logflags, whichfork); 30126d04558fSChristoph Hellwig *logflagsp |= tmp_logflags; 30136d04558fSChristoph Hellwig cur = *curp; 301430f712c9SDave Chinner if (error) 301530f712c9SDave Chinner goto done; 301630f712c9SDave Chinner } 301730f712c9SDave Chinner 301830f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 30196d04558fSChristoph Hellwig if (cur) 30206d04558fSChristoph Hellwig cur->bc_private.b.allocated = 0; 302130f712c9SDave Chinner 30226d04558fSChristoph Hellwig xfs_bmap_check_leaf_extents(cur, ip, whichfork); 302330f712c9SDave Chinner done: 30246d04558fSChristoph Hellwig *logflagsp |= rval; 302530f712c9SDave Chinner return error; 302630f712c9SDave Chinner } 302730f712c9SDave Chinner 302830f712c9SDave Chinner /* 302930f712c9SDave Chinner * Functions used in the extent read, allocate and remove paths 303030f712c9SDave Chinner */ 303130f712c9SDave Chinner 303230f712c9SDave Chinner /* 303330f712c9SDave Chinner * Adjust the size of the new extent based on di_extsize and rt extsize. 303430f712c9SDave Chinner */ 303530f712c9SDave Chinner int 303630f712c9SDave Chinner xfs_bmap_extsize_align( 303730f712c9SDave Chinner xfs_mount_t *mp, 303830f712c9SDave Chinner xfs_bmbt_irec_t *gotp, /* next extent pointer */ 303930f712c9SDave Chinner xfs_bmbt_irec_t *prevp, /* previous extent pointer */ 304030f712c9SDave Chinner xfs_extlen_t extsz, /* align to this extent size */ 304130f712c9SDave Chinner int rt, /* is this a realtime inode? */ 304230f712c9SDave Chinner int eof, /* is extent at end-of-file? */ 304330f712c9SDave Chinner int delay, /* creating delalloc extent? */ 304430f712c9SDave Chinner int convert, /* overwriting unwritten extent? */ 304530f712c9SDave Chinner xfs_fileoff_t *offp, /* in/out: aligned offset */ 304630f712c9SDave Chinner xfs_extlen_t *lenp) /* in/out: aligned length */ 304730f712c9SDave Chinner { 304830f712c9SDave Chinner xfs_fileoff_t orig_off; /* original offset */ 304930f712c9SDave Chinner xfs_extlen_t orig_alen; /* original length */ 305030f712c9SDave Chinner xfs_fileoff_t orig_end; /* original off+len */ 305130f712c9SDave Chinner xfs_fileoff_t nexto; /* next file offset */ 305230f712c9SDave Chinner xfs_fileoff_t prevo; /* previous file offset */ 305330f712c9SDave Chinner xfs_fileoff_t align_off; /* temp for offset */ 305430f712c9SDave Chinner xfs_extlen_t align_alen; /* temp for length */ 305530f712c9SDave Chinner xfs_extlen_t temp; /* temp for calculations */ 305630f712c9SDave Chinner 305730f712c9SDave Chinner if (convert) 305830f712c9SDave Chinner return 0; 305930f712c9SDave Chinner 306030f712c9SDave Chinner orig_off = align_off = *offp; 306130f712c9SDave Chinner orig_alen = align_alen = *lenp; 306230f712c9SDave Chinner orig_end = orig_off + orig_alen; 306330f712c9SDave Chinner 306430f712c9SDave Chinner /* 306530f712c9SDave Chinner * If this request overlaps an existing extent, then don't 306630f712c9SDave Chinner * attempt to perform any additional alignment. 306730f712c9SDave Chinner */ 306830f712c9SDave Chinner if (!delay && !eof && 306930f712c9SDave Chinner (orig_off >= gotp->br_startoff) && 307030f712c9SDave Chinner (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { 307130f712c9SDave Chinner return 0; 307230f712c9SDave Chinner } 307330f712c9SDave Chinner 307430f712c9SDave Chinner /* 307530f712c9SDave Chinner * If the file offset is unaligned vs. the extent size 307630f712c9SDave Chinner * we need to align it. This will be possible unless 307730f712c9SDave Chinner * the file was previously written with a kernel that didn't 307830f712c9SDave Chinner * perform this alignment, or if a truncate shot us in the 307930f712c9SDave Chinner * foot. 308030f712c9SDave Chinner */ 308130f712c9SDave Chinner temp = do_mod(orig_off, extsz); 308230f712c9SDave Chinner if (temp) { 308330f712c9SDave Chinner align_alen += temp; 308430f712c9SDave Chinner align_off -= temp; 308530f712c9SDave Chinner } 30866dea405eSDave Chinner 30876dea405eSDave Chinner /* Same adjustment for the end of the requested area. */ 30886dea405eSDave Chinner temp = (align_alen % extsz); 30896dea405eSDave Chinner if (temp) 309030f712c9SDave Chinner align_alen += extsz - temp; 30916dea405eSDave Chinner 30926dea405eSDave Chinner /* 30936dea405eSDave Chinner * For large extent hint sizes, the aligned extent might be larger than 30946dea405eSDave Chinner * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls 30956dea405eSDave Chinner * the length back under MAXEXTLEN. The outer allocation loops handle 30966dea405eSDave Chinner * short allocation just fine, so it is safe to do this. We only want to 30976dea405eSDave Chinner * do it when we are forced to, though, because it means more allocation 30986dea405eSDave Chinner * operations are required. 30996dea405eSDave Chinner */ 31006dea405eSDave Chinner while (align_alen > MAXEXTLEN) 31016dea405eSDave Chinner align_alen -= extsz; 31026dea405eSDave Chinner ASSERT(align_alen <= MAXEXTLEN); 31036dea405eSDave Chinner 310430f712c9SDave Chinner /* 310530f712c9SDave Chinner * If the previous block overlaps with this proposed allocation 310630f712c9SDave Chinner * then move the start forward without adjusting the length. 310730f712c9SDave Chinner */ 310830f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) { 310930f712c9SDave Chinner if (prevp->br_startblock == HOLESTARTBLOCK) 311030f712c9SDave Chinner prevo = prevp->br_startoff; 311130f712c9SDave Chinner else 311230f712c9SDave Chinner prevo = prevp->br_startoff + prevp->br_blockcount; 311330f712c9SDave Chinner } else 311430f712c9SDave Chinner prevo = 0; 311530f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 311630f712c9SDave Chinner align_off = prevo; 311730f712c9SDave Chinner /* 311830f712c9SDave Chinner * If the next block overlaps with this proposed allocation 311930f712c9SDave Chinner * then move the start back without adjusting the length, 312030f712c9SDave Chinner * but not before offset 0. 312130f712c9SDave Chinner * This may of course make the start overlap previous block, 312230f712c9SDave Chinner * and if we hit the offset 0 limit then the next block 312330f712c9SDave Chinner * can still overlap too. 312430f712c9SDave Chinner */ 312530f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) { 312630f712c9SDave Chinner if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || 312730f712c9SDave Chinner (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) 312830f712c9SDave Chinner nexto = gotp->br_startoff + gotp->br_blockcount; 312930f712c9SDave Chinner else 313030f712c9SDave Chinner nexto = gotp->br_startoff; 313130f712c9SDave Chinner } else 313230f712c9SDave Chinner nexto = NULLFILEOFF; 313330f712c9SDave Chinner if (!eof && 313430f712c9SDave Chinner align_off + align_alen != orig_end && 313530f712c9SDave Chinner align_off + align_alen > nexto) 313630f712c9SDave Chinner align_off = nexto > align_alen ? nexto - align_alen : 0; 313730f712c9SDave Chinner /* 313830f712c9SDave Chinner * If we're now overlapping the next or previous extent that 313930f712c9SDave Chinner * means we can't fit an extsz piece in this hole. Just move 314030f712c9SDave Chinner * the start forward to the first valid spot and set 314130f712c9SDave Chinner * the length so we hit the end. 314230f712c9SDave Chinner */ 314330f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 314430f712c9SDave Chinner align_off = prevo; 314530f712c9SDave Chinner if (align_off + align_alen != orig_end && 314630f712c9SDave Chinner align_off + align_alen > nexto && 314730f712c9SDave Chinner nexto != NULLFILEOFF) { 314830f712c9SDave Chinner ASSERT(nexto > prevo); 314930f712c9SDave Chinner align_alen = nexto - align_off; 315030f712c9SDave Chinner } 315130f712c9SDave Chinner 315230f712c9SDave Chinner /* 315330f712c9SDave Chinner * If realtime, and the result isn't a multiple of the realtime 315430f712c9SDave Chinner * extent size we need to remove blocks until it is. 315530f712c9SDave Chinner */ 315630f712c9SDave Chinner if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { 315730f712c9SDave Chinner /* 315830f712c9SDave Chinner * We're not covering the original request, or 315930f712c9SDave Chinner * we won't be able to once we fix the length. 316030f712c9SDave Chinner */ 316130f712c9SDave Chinner if (orig_off < align_off || 316230f712c9SDave Chinner orig_end > align_off + align_alen || 316330f712c9SDave Chinner align_alen - temp < orig_alen) 31642451337dSDave Chinner return -EINVAL; 316530f712c9SDave Chinner /* 316630f712c9SDave Chinner * Try to fix it by moving the start up. 316730f712c9SDave Chinner */ 316830f712c9SDave Chinner if (align_off + temp <= orig_off) { 316930f712c9SDave Chinner align_alen -= temp; 317030f712c9SDave Chinner align_off += temp; 317130f712c9SDave Chinner } 317230f712c9SDave Chinner /* 317330f712c9SDave Chinner * Try to fix it by moving the end in. 317430f712c9SDave Chinner */ 317530f712c9SDave Chinner else if (align_off + align_alen - temp >= orig_end) 317630f712c9SDave Chinner align_alen -= temp; 317730f712c9SDave Chinner /* 317830f712c9SDave Chinner * Set the start to the minimum then trim the length. 317930f712c9SDave Chinner */ 318030f712c9SDave Chinner else { 318130f712c9SDave Chinner align_alen -= orig_off - align_off; 318230f712c9SDave Chinner align_off = orig_off; 318330f712c9SDave Chinner align_alen -= align_alen % mp->m_sb.sb_rextsize; 318430f712c9SDave Chinner } 318530f712c9SDave Chinner /* 318630f712c9SDave Chinner * Result doesn't cover the request, fail it. 318730f712c9SDave Chinner */ 318830f712c9SDave Chinner if (orig_off < align_off || orig_end > align_off + align_alen) 31892451337dSDave Chinner return -EINVAL; 319030f712c9SDave Chinner } else { 319130f712c9SDave Chinner ASSERT(orig_off >= align_off); 31926dea405eSDave Chinner /* see MAXEXTLEN handling above */ 31936dea405eSDave Chinner ASSERT(orig_end <= align_off + align_alen || 31946dea405eSDave Chinner align_alen + extsz > MAXEXTLEN); 319530f712c9SDave Chinner } 319630f712c9SDave Chinner 319730f712c9SDave Chinner #ifdef DEBUG 319830f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) 319930f712c9SDave Chinner ASSERT(align_off + align_alen <= gotp->br_startoff); 320030f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) 320130f712c9SDave Chinner ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); 320230f712c9SDave Chinner #endif 320330f712c9SDave Chinner 320430f712c9SDave Chinner *lenp = align_alen; 320530f712c9SDave Chinner *offp = align_off; 320630f712c9SDave Chinner return 0; 320730f712c9SDave Chinner } 320830f712c9SDave Chinner 320930f712c9SDave Chinner #define XFS_ALLOC_GAP_UNITS 4 321030f712c9SDave Chinner 321130f712c9SDave Chinner void 321230f712c9SDave Chinner xfs_bmap_adjacent( 321330f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 321430f712c9SDave Chinner { 321530f712c9SDave Chinner xfs_fsblock_t adjust; /* adjustment to block numbers */ 321630f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 321730f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 321830f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 321930f712c9SDave Chinner int rt; /* true if inode is realtime */ 322030f712c9SDave Chinner 322130f712c9SDave Chinner #define ISVALID(x,y) \ 322230f712c9SDave Chinner (rt ? \ 322330f712c9SDave Chinner (x) < mp->m_sb.sb_rblocks : \ 322430f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ 322530f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ 322630f712c9SDave Chinner XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) 322730f712c9SDave Chinner 322830f712c9SDave Chinner mp = ap->ip->i_mount; 322930f712c9SDave Chinner nullfb = *ap->firstblock == NULLFSBLOCK; 3230292378edSDave Chinner rt = XFS_IS_REALTIME_INODE(ap->ip) && 3231292378edSDave Chinner xfs_alloc_is_userdata(ap->datatype); 323230f712c9SDave Chinner fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); 323330f712c9SDave Chinner /* 323430f712c9SDave Chinner * If allocating at eof, and there's a previous real block, 323530f712c9SDave Chinner * try to use its last block as our starting point. 323630f712c9SDave Chinner */ 323730f712c9SDave Chinner if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && 323830f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 323930f712c9SDave Chinner ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, 324030f712c9SDave Chinner ap->prev.br_startblock)) { 324130f712c9SDave Chinner ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; 324230f712c9SDave Chinner /* 324330f712c9SDave Chinner * Adjust for the gap between prevp and us. 324430f712c9SDave Chinner */ 324530f712c9SDave Chinner adjust = ap->offset - 324630f712c9SDave Chinner (ap->prev.br_startoff + ap->prev.br_blockcount); 324730f712c9SDave Chinner if (adjust && 324830f712c9SDave Chinner ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) 324930f712c9SDave Chinner ap->blkno += adjust; 325030f712c9SDave Chinner } 325130f712c9SDave Chinner /* 325230f712c9SDave Chinner * If not at eof, then compare the two neighbor blocks. 325330f712c9SDave Chinner * Figure out whether either one gives us a good starting point, 325430f712c9SDave Chinner * and pick the better one. 325530f712c9SDave Chinner */ 325630f712c9SDave Chinner else if (!ap->eof) { 325730f712c9SDave Chinner xfs_fsblock_t gotbno; /* right side block number */ 325830f712c9SDave Chinner xfs_fsblock_t gotdiff=0; /* right side difference */ 325930f712c9SDave Chinner xfs_fsblock_t prevbno; /* left side block number */ 326030f712c9SDave Chinner xfs_fsblock_t prevdiff=0; /* left side difference */ 326130f712c9SDave Chinner 326230f712c9SDave Chinner /* 326330f712c9SDave Chinner * If there's a previous (left) block, select a requested 326430f712c9SDave Chinner * start block based on it. 326530f712c9SDave Chinner */ 326630f712c9SDave Chinner if (ap->prev.br_startoff != NULLFILEOFF && 326730f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 326830f712c9SDave Chinner (prevbno = ap->prev.br_startblock + 326930f712c9SDave Chinner ap->prev.br_blockcount) && 327030f712c9SDave Chinner ISVALID(prevbno, ap->prev.br_startblock)) { 327130f712c9SDave Chinner /* 327230f712c9SDave Chinner * Calculate gap to end of previous block. 327330f712c9SDave Chinner */ 327430f712c9SDave Chinner adjust = prevdiff = ap->offset - 327530f712c9SDave Chinner (ap->prev.br_startoff + 327630f712c9SDave Chinner ap->prev.br_blockcount); 327730f712c9SDave Chinner /* 327830f712c9SDave Chinner * Figure the startblock based on the previous block's 327930f712c9SDave Chinner * end and the gap size. 328030f712c9SDave Chinner * Heuristic! 328130f712c9SDave Chinner * If the gap is large relative to the piece we're 328230f712c9SDave Chinner * allocating, or using it gives us an invalid block 328330f712c9SDave Chinner * number, then just use the end of the previous block. 328430f712c9SDave Chinner */ 328530f712c9SDave Chinner if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 328630f712c9SDave Chinner ISVALID(prevbno + prevdiff, 328730f712c9SDave Chinner ap->prev.br_startblock)) 328830f712c9SDave Chinner prevbno += adjust; 328930f712c9SDave Chinner else 329030f712c9SDave Chinner prevdiff += adjust; 329130f712c9SDave Chinner /* 329230f712c9SDave Chinner * If the firstblock forbids it, can't use it, 329330f712c9SDave Chinner * must use default. 329430f712c9SDave Chinner */ 329530f712c9SDave Chinner if (!rt && !nullfb && 329630f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) 329730f712c9SDave Chinner prevbno = NULLFSBLOCK; 329830f712c9SDave Chinner } 329930f712c9SDave Chinner /* 330030f712c9SDave Chinner * No previous block or can't follow it, just default. 330130f712c9SDave Chinner */ 330230f712c9SDave Chinner else 330330f712c9SDave Chinner prevbno = NULLFSBLOCK; 330430f712c9SDave Chinner /* 330530f712c9SDave Chinner * If there's a following (right) block, select a requested 330630f712c9SDave Chinner * start block based on it. 330730f712c9SDave Chinner */ 330830f712c9SDave Chinner if (!isnullstartblock(ap->got.br_startblock)) { 330930f712c9SDave Chinner /* 331030f712c9SDave Chinner * Calculate gap to start of next block. 331130f712c9SDave Chinner */ 331230f712c9SDave Chinner adjust = gotdiff = ap->got.br_startoff - ap->offset; 331330f712c9SDave Chinner /* 331430f712c9SDave Chinner * Figure the startblock based on the next block's 331530f712c9SDave Chinner * start and the gap size. 331630f712c9SDave Chinner */ 331730f712c9SDave Chinner gotbno = ap->got.br_startblock; 331830f712c9SDave Chinner /* 331930f712c9SDave Chinner * Heuristic! 332030f712c9SDave Chinner * If the gap is large relative to the piece we're 332130f712c9SDave Chinner * allocating, or using it gives us an invalid block 332230f712c9SDave Chinner * number, then just use the start of the next block 332330f712c9SDave Chinner * offset by our length. 332430f712c9SDave Chinner */ 332530f712c9SDave Chinner if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 332630f712c9SDave Chinner ISVALID(gotbno - gotdiff, gotbno)) 332730f712c9SDave Chinner gotbno -= adjust; 332830f712c9SDave Chinner else if (ISVALID(gotbno - ap->length, gotbno)) { 332930f712c9SDave Chinner gotbno -= ap->length; 333030f712c9SDave Chinner gotdiff += adjust - ap->length; 333130f712c9SDave Chinner } else 333230f712c9SDave Chinner gotdiff += adjust; 333330f712c9SDave Chinner /* 333430f712c9SDave Chinner * If the firstblock forbids it, can't use it, 333530f712c9SDave Chinner * must use default. 333630f712c9SDave Chinner */ 333730f712c9SDave Chinner if (!rt && !nullfb && 333830f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) 333930f712c9SDave Chinner gotbno = NULLFSBLOCK; 334030f712c9SDave Chinner } 334130f712c9SDave Chinner /* 334230f712c9SDave Chinner * No next block, just default. 334330f712c9SDave Chinner */ 334430f712c9SDave Chinner else 334530f712c9SDave Chinner gotbno = NULLFSBLOCK; 334630f712c9SDave Chinner /* 334730f712c9SDave Chinner * If both valid, pick the better one, else the only good 334830f712c9SDave Chinner * one, else ap->blkno is already set (to 0 or the inode block). 334930f712c9SDave Chinner */ 335030f712c9SDave Chinner if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) 335130f712c9SDave Chinner ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; 335230f712c9SDave Chinner else if (prevbno != NULLFSBLOCK) 335330f712c9SDave Chinner ap->blkno = prevbno; 335430f712c9SDave Chinner else if (gotbno != NULLFSBLOCK) 335530f712c9SDave Chinner ap->blkno = gotbno; 335630f712c9SDave Chinner } 335730f712c9SDave Chinner #undef ISVALID 335830f712c9SDave Chinner } 335930f712c9SDave Chinner 336030f712c9SDave Chinner static int 336130f712c9SDave Chinner xfs_bmap_longest_free_extent( 336230f712c9SDave Chinner struct xfs_trans *tp, 336330f712c9SDave Chinner xfs_agnumber_t ag, 336430f712c9SDave Chinner xfs_extlen_t *blen, 336530f712c9SDave Chinner int *notinit) 336630f712c9SDave Chinner { 336730f712c9SDave Chinner struct xfs_mount *mp = tp->t_mountp; 336830f712c9SDave Chinner struct xfs_perag *pag; 336930f712c9SDave Chinner xfs_extlen_t longest; 337030f712c9SDave Chinner int error = 0; 337130f712c9SDave Chinner 337230f712c9SDave Chinner pag = xfs_perag_get(mp, ag); 337330f712c9SDave Chinner if (!pag->pagf_init) { 337430f712c9SDave Chinner error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); 337530f712c9SDave Chinner if (error) 337630f712c9SDave Chinner goto out; 337730f712c9SDave Chinner 337830f712c9SDave Chinner if (!pag->pagf_init) { 337930f712c9SDave Chinner *notinit = 1; 338030f712c9SDave Chinner goto out; 338130f712c9SDave Chinner } 338230f712c9SDave Chinner } 338330f712c9SDave Chinner 338450adbcb4SDave Chinner longest = xfs_alloc_longest_free_extent(mp, pag, 33853fd129b6SDarrick J. Wong xfs_alloc_min_freelist(mp, pag), 33863fd129b6SDarrick J. Wong xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE)); 338730f712c9SDave Chinner if (*blen < longest) 338830f712c9SDave Chinner *blen = longest; 338930f712c9SDave Chinner 339030f712c9SDave Chinner out: 339130f712c9SDave Chinner xfs_perag_put(pag); 339230f712c9SDave Chinner return error; 339330f712c9SDave Chinner } 339430f712c9SDave Chinner 339530f712c9SDave Chinner static void 339630f712c9SDave Chinner xfs_bmap_select_minlen( 339730f712c9SDave Chinner struct xfs_bmalloca *ap, 339830f712c9SDave Chinner struct xfs_alloc_arg *args, 339930f712c9SDave Chinner xfs_extlen_t *blen, 340030f712c9SDave Chinner int notinit) 340130f712c9SDave Chinner { 340230f712c9SDave Chinner if (notinit || *blen < ap->minlen) { 340330f712c9SDave Chinner /* 340430f712c9SDave Chinner * Since we did a BUF_TRYLOCK above, it is possible that 340530f712c9SDave Chinner * there is space for this request. 340630f712c9SDave Chinner */ 340730f712c9SDave Chinner args->minlen = ap->minlen; 340830f712c9SDave Chinner } else if (*blen < args->maxlen) { 340930f712c9SDave Chinner /* 341030f712c9SDave Chinner * If the best seen length is less than the request length, 341130f712c9SDave Chinner * use the best as the minimum. 341230f712c9SDave Chinner */ 341330f712c9SDave Chinner args->minlen = *blen; 341430f712c9SDave Chinner } else { 341530f712c9SDave Chinner /* 341630f712c9SDave Chinner * Otherwise we've seen an extent as big as maxlen, use that 341730f712c9SDave Chinner * as the minimum. 341830f712c9SDave Chinner */ 341930f712c9SDave Chinner args->minlen = args->maxlen; 342030f712c9SDave Chinner } 342130f712c9SDave Chinner } 342230f712c9SDave Chinner 342330f712c9SDave Chinner STATIC int 342430f712c9SDave Chinner xfs_bmap_btalloc_nullfb( 342530f712c9SDave Chinner struct xfs_bmalloca *ap, 342630f712c9SDave Chinner struct xfs_alloc_arg *args, 342730f712c9SDave Chinner xfs_extlen_t *blen) 342830f712c9SDave Chinner { 342930f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 343030f712c9SDave Chinner xfs_agnumber_t ag, startag; 343130f712c9SDave Chinner int notinit = 0; 343230f712c9SDave Chinner int error; 343330f712c9SDave Chinner 343430f712c9SDave Chinner args->type = XFS_ALLOCTYPE_START_BNO; 343530f712c9SDave Chinner args->total = ap->total; 343630f712c9SDave Chinner 343730f712c9SDave Chinner startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 343830f712c9SDave Chinner if (startag == NULLAGNUMBER) 343930f712c9SDave Chinner startag = ag = 0; 344030f712c9SDave Chinner 344130f712c9SDave Chinner while (*blen < args->maxlen) { 344230f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 344330f712c9SDave Chinner ¬init); 344430f712c9SDave Chinner if (error) 344530f712c9SDave Chinner return error; 344630f712c9SDave Chinner 344730f712c9SDave Chinner if (++ag == mp->m_sb.sb_agcount) 344830f712c9SDave Chinner ag = 0; 344930f712c9SDave Chinner if (ag == startag) 345030f712c9SDave Chinner break; 345130f712c9SDave Chinner } 345230f712c9SDave Chinner 345330f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 345430f712c9SDave Chinner return 0; 345530f712c9SDave Chinner } 345630f712c9SDave Chinner 345730f712c9SDave Chinner STATIC int 345830f712c9SDave Chinner xfs_bmap_btalloc_filestreams( 345930f712c9SDave Chinner struct xfs_bmalloca *ap, 346030f712c9SDave Chinner struct xfs_alloc_arg *args, 346130f712c9SDave Chinner xfs_extlen_t *blen) 346230f712c9SDave Chinner { 346330f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 346430f712c9SDave Chinner xfs_agnumber_t ag; 346530f712c9SDave Chinner int notinit = 0; 346630f712c9SDave Chinner int error; 346730f712c9SDave Chinner 346830f712c9SDave Chinner args->type = XFS_ALLOCTYPE_NEAR_BNO; 346930f712c9SDave Chinner args->total = ap->total; 347030f712c9SDave Chinner 347130f712c9SDave Chinner ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 347230f712c9SDave Chinner if (ag == NULLAGNUMBER) 347330f712c9SDave Chinner ag = 0; 347430f712c9SDave Chinner 347530f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); 347630f712c9SDave Chinner if (error) 347730f712c9SDave Chinner return error; 347830f712c9SDave Chinner 347930f712c9SDave Chinner if (*blen < args->maxlen) { 348030f712c9SDave Chinner error = xfs_filestream_new_ag(ap, &ag); 348130f712c9SDave Chinner if (error) 348230f712c9SDave Chinner return error; 348330f712c9SDave Chinner 348430f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 348530f712c9SDave Chinner ¬init); 348630f712c9SDave Chinner if (error) 348730f712c9SDave Chinner return error; 348830f712c9SDave Chinner 348930f712c9SDave Chinner } 349030f712c9SDave Chinner 349130f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 349230f712c9SDave Chinner 349330f712c9SDave Chinner /* 349430f712c9SDave Chinner * Set the failure fallback case to look in the selected AG as stream 349530f712c9SDave Chinner * may have moved. 349630f712c9SDave Chinner */ 349730f712c9SDave Chinner ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); 349830f712c9SDave Chinner return 0; 349930f712c9SDave Chinner } 350030f712c9SDave Chinner 350130f712c9SDave Chinner STATIC int 350230f712c9SDave Chinner xfs_bmap_btalloc( 350330f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 350430f712c9SDave Chinner { 350530f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 350630f712c9SDave Chinner xfs_alloctype_t atype = 0; /* type for allocation routines */ 3507292378edSDave Chinner xfs_extlen_t align = 0; /* minimum allocation alignment */ 350830f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 350930f712c9SDave Chinner xfs_agnumber_t ag; 351030f712c9SDave Chinner xfs_alloc_arg_t args; 351130f712c9SDave Chinner xfs_extlen_t blen; 351230f712c9SDave Chinner xfs_extlen_t nextminlen = 0; 351330f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 351430f712c9SDave Chinner int isaligned; 351530f712c9SDave Chinner int tryagain; 351630f712c9SDave Chinner int error; 351730f712c9SDave Chinner int stripe_align; 351830f712c9SDave Chinner 351930f712c9SDave Chinner ASSERT(ap->length); 352030f712c9SDave Chinner 352130f712c9SDave Chinner mp = ap->ip->i_mount; 352230f712c9SDave Chinner 352330f712c9SDave Chinner /* stripe alignment for allocation is determined by mount parameters */ 352430f712c9SDave Chinner stripe_align = 0; 352530f712c9SDave Chinner if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) 352630f712c9SDave Chinner stripe_align = mp->m_swidth; 352730f712c9SDave Chinner else if (mp->m_dalign) 352830f712c9SDave Chinner stripe_align = mp->m_dalign; 352930f712c9SDave Chinner 3530f7ca3522SDarrick J. Wong if (ap->flags & XFS_BMAPI_COWFORK) 3531f7ca3522SDarrick J. Wong align = xfs_get_cowextsz_hint(ap->ip); 3532f7ca3522SDarrick J. Wong else if (xfs_alloc_is_userdata(ap->datatype)) 3533292378edSDave Chinner align = xfs_get_extsz_hint(ap->ip); 3534493611ebSChristoph Hellwig if (align) { 353530f712c9SDave Chinner error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, 353630f712c9SDave Chinner align, 0, ap->eof, 0, ap->conv, 353730f712c9SDave Chinner &ap->offset, &ap->length); 353830f712c9SDave Chinner ASSERT(!error); 353930f712c9SDave Chinner ASSERT(ap->length); 354030f712c9SDave Chinner } 354130f712c9SDave Chinner 354230f712c9SDave Chinner 354330f712c9SDave Chinner nullfb = *ap->firstblock == NULLFSBLOCK; 354430f712c9SDave Chinner fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); 354530f712c9SDave Chinner if (nullfb) { 3546292378edSDave Chinner if (xfs_alloc_is_userdata(ap->datatype) && 3547292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) { 354830f712c9SDave Chinner ag = xfs_filestream_lookup_ag(ap->ip); 354930f712c9SDave Chinner ag = (ag != NULLAGNUMBER) ? ag : 0; 355030f712c9SDave Chinner ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); 355130f712c9SDave Chinner } else { 355230f712c9SDave Chinner ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); 355330f712c9SDave Chinner } 355430f712c9SDave Chinner } else 355530f712c9SDave Chinner ap->blkno = *ap->firstblock; 355630f712c9SDave Chinner 355730f712c9SDave Chinner xfs_bmap_adjacent(ap); 355830f712c9SDave Chinner 355930f712c9SDave Chinner /* 356030f712c9SDave Chinner * If allowed, use ap->blkno; otherwise must use firstblock since 356130f712c9SDave Chinner * it's in the right allocation group. 356230f712c9SDave Chinner */ 356330f712c9SDave Chinner if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) 356430f712c9SDave Chinner ; 356530f712c9SDave Chinner else 356630f712c9SDave Chinner ap->blkno = *ap->firstblock; 356730f712c9SDave Chinner /* 356830f712c9SDave Chinner * Normal allocation, done through xfs_alloc_vextent. 356930f712c9SDave Chinner */ 357030f712c9SDave Chinner tryagain = isaligned = 0; 357130f712c9SDave Chinner memset(&args, 0, sizeof(args)); 357230f712c9SDave Chinner args.tp = ap->tp; 357330f712c9SDave Chinner args.mp = mp; 357430f712c9SDave Chinner args.fsbno = ap->blkno; 3575340785ccSDarrick J. Wong xfs_rmap_skip_owner_update(&args.oinfo); 357630f712c9SDave Chinner 357730f712c9SDave Chinner /* Trim the allocation back to the maximum an AG can fit. */ 357852548852SDarrick J. Wong args.maxlen = MIN(ap->length, mp->m_ag_max_usable); 357930f712c9SDave Chinner args.firstblock = *ap->firstblock; 358030f712c9SDave Chinner blen = 0; 358130f712c9SDave Chinner if (nullfb) { 358230f712c9SDave Chinner /* 358330f712c9SDave Chinner * Search for an allocation group with a single extent large 358430f712c9SDave Chinner * enough for the request. If one isn't found, then adjust 358530f712c9SDave Chinner * the minimum allocation size to the largest space found. 358630f712c9SDave Chinner */ 3587292378edSDave Chinner if (xfs_alloc_is_userdata(ap->datatype) && 3588292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) 358930f712c9SDave Chinner error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); 359030f712c9SDave Chinner else 359130f712c9SDave Chinner error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); 359230f712c9SDave Chinner if (error) 359330f712c9SDave Chinner return error; 35942c3234d1SDarrick J. Wong } else if (ap->dfops->dop_low) { 359530f712c9SDave Chinner if (xfs_inode_is_filestream(ap->ip)) 359630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 359730f712c9SDave Chinner else 359830f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 359930f712c9SDave Chinner args.total = args.minlen = ap->minlen; 360030f712c9SDave Chinner } else { 360130f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 360230f712c9SDave Chinner args.total = ap->total; 360330f712c9SDave Chinner args.minlen = ap->minlen; 360430f712c9SDave Chinner } 360530f712c9SDave Chinner /* apply extent size hints if obtained earlier */ 3606493611ebSChristoph Hellwig if (align) { 360730f712c9SDave Chinner args.prod = align; 360830f712c9SDave Chinner if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) 360930f712c9SDave Chinner args.mod = (xfs_extlen_t)(args.prod - args.mod); 361009cbfeafSKirill A. Shutemov } else if (mp->m_sb.sb_blocksize >= PAGE_SIZE) { 361130f712c9SDave Chinner args.prod = 1; 361230f712c9SDave Chinner args.mod = 0; 361330f712c9SDave Chinner } else { 361409cbfeafSKirill A. Shutemov args.prod = PAGE_SIZE >> mp->m_sb.sb_blocklog; 361530f712c9SDave Chinner if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) 361630f712c9SDave Chinner args.mod = (xfs_extlen_t)(args.prod - args.mod); 361730f712c9SDave Chinner } 361830f712c9SDave Chinner /* 361930f712c9SDave Chinner * If we are not low on available data blocks, and the 362030f712c9SDave Chinner * underlying logical volume manager is a stripe, and 362130f712c9SDave Chinner * the file offset is zero then try to allocate data 362230f712c9SDave Chinner * blocks on stripe unit boundary. 362330f712c9SDave Chinner * NOTE: ap->aeof is only set if the allocation length 362430f712c9SDave Chinner * is >= the stripe unit and the allocation offset is 362530f712c9SDave Chinner * at the end of file. 362630f712c9SDave Chinner */ 36272c3234d1SDarrick J. Wong if (!ap->dfops->dop_low && ap->aeof) { 362830f712c9SDave Chinner if (!ap->offset) { 362930f712c9SDave Chinner args.alignment = stripe_align; 363030f712c9SDave Chinner atype = args.type; 363130f712c9SDave Chinner isaligned = 1; 363230f712c9SDave Chinner /* 363330f712c9SDave Chinner * Adjust for alignment 363430f712c9SDave Chinner */ 363530f712c9SDave Chinner if (blen > args.alignment && blen <= args.maxlen) 363630f712c9SDave Chinner args.minlen = blen - args.alignment; 363730f712c9SDave Chinner args.minalignslop = 0; 363830f712c9SDave Chinner } else { 363930f712c9SDave Chinner /* 364030f712c9SDave Chinner * First try an exact bno allocation. 364130f712c9SDave Chinner * If it fails then do a near or start bno 364230f712c9SDave Chinner * allocation with alignment turned on. 364330f712c9SDave Chinner */ 364430f712c9SDave Chinner atype = args.type; 364530f712c9SDave Chinner tryagain = 1; 364630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_THIS_BNO; 364730f712c9SDave Chinner args.alignment = 1; 364830f712c9SDave Chinner /* 364930f712c9SDave Chinner * Compute the minlen+alignment for the 365030f712c9SDave Chinner * next case. Set slop so that the value 365130f712c9SDave Chinner * of minlen+alignment+slop doesn't go up 365230f712c9SDave Chinner * between the calls. 365330f712c9SDave Chinner */ 365430f712c9SDave Chinner if (blen > stripe_align && blen <= args.maxlen) 365530f712c9SDave Chinner nextminlen = blen - stripe_align; 365630f712c9SDave Chinner else 365730f712c9SDave Chinner nextminlen = args.minlen; 365830f712c9SDave Chinner if (nextminlen + stripe_align > args.minlen + 1) 365930f712c9SDave Chinner args.minalignslop = 366030f712c9SDave Chinner nextminlen + stripe_align - 366130f712c9SDave Chinner args.minlen - 1; 366230f712c9SDave Chinner else 366330f712c9SDave Chinner args.minalignslop = 0; 366430f712c9SDave Chinner } 366530f712c9SDave Chinner } else { 366630f712c9SDave Chinner args.alignment = 1; 366730f712c9SDave Chinner args.minalignslop = 0; 366830f712c9SDave Chinner } 366930f712c9SDave Chinner args.minleft = ap->minleft; 367030f712c9SDave Chinner args.wasdel = ap->wasdel; 36713fd129b6SDarrick J. Wong args.resv = XFS_AG_RESV_NONE; 3672292378edSDave Chinner args.datatype = ap->datatype; 3673292378edSDave Chinner if (ap->datatype & XFS_ALLOC_USERDATA_ZERO) 36743fbbbea3SDave Chinner args.ip = ap->ip; 36753fbbbea3SDave Chinner 36763fbbbea3SDave Chinner error = xfs_alloc_vextent(&args); 36773fbbbea3SDave Chinner if (error) 367830f712c9SDave Chinner return error; 36793fbbbea3SDave Chinner 368030f712c9SDave Chinner if (tryagain && args.fsbno == NULLFSBLOCK) { 368130f712c9SDave Chinner /* 368230f712c9SDave Chinner * Exact allocation failed. Now try with alignment 368330f712c9SDave Chinner * turned on. 368430f712c9SDave Chinner */ 368530f712c9SDave Chinner args.type = atype; 368630f712c9SDave Chinner args.fsbno = ap->blkno; 368730f712c9SDave Chinner args.alignment = stripe_align; 368830f712c9SDave Chinner args.minlen = nextminlen; 368930f712c9SDave Chinner args.minalignslop = 0; 369030f712c9SDave Chinner isaligned = 1; 369130f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 369230f712c9SDave Chinner return error; 369330f712c9SDave Chinner } 369430f712c9SDave Chinner if (isaligned && args.fsbno == NULLFSBLOCK) { 369530f712c9SDave Chinner /* 369630f712c9SDave Chinner * allocation failed, so turn off alignment and 369730f712c9SDave Chinner * try again. 369830f712c9SDave Chinner */ 369930f712c9SDave Chinner args.type = atype; 370030f712c9SDave Chinner args.fsbno = ap->blkno; 370130f712c9SDave Chinner args.alignment = 0; 370230f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 370330f712c9SDave Chinner return error; 370430f712c9SDave Chinner } 370530f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb && 370630f712c9SDave Chinner args.minlen > ap->minlen) { 370730f712c9SDave Chinner args.minlen = ap->minlen; 370830f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 370930f712c9SDave Chinner args.fsbno = ap->blkno; 371030f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 371130f712c9SDave Chinner return error; 371230f712c9SDave Chinner } 371330f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb) { 371430f712c9SDave Chinner args.fsbno = 0; 371530f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 371630f712c9SDave Chinner args.total = ap->minlen; 371730f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 371830f712c9SDave Chinner return error; 37192c3234d1SDarrick J. Wong ap->dfops->dop_low = true; 372030f712c9SDave Chinner } 372130f712c9SDave Chinner if (args.fsbno != NULLFSBLOCK) { 372230f712c9SDave Chinner /* 372330f712c9SDave Chinner * check the allocation happened at the same or higher AG than 372430f712c9SDave Chinner * the first block that was allocated. 372530f712c9SDave Chinner */ 372630f712c9SDave Chinner ASSERT(*ap->firstblock == NULLFSBLOCK || 3727410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, *ap->firstblock) <= 3728410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, args.fsbno)); 372930f712c9SDave Chinner 373030f712c9SDave Chinner ap->blkno = args.fsbno; 373130f712c9SDave Chinner if (*ap->firstblock == NULLFSBLOCK) 373230f712c9SDave Chinner *ap->firstblock = args.fsbno; 3733410d17f6SChristoph Hellwig ASSERT(nullfb || fb_agno <= args.agno); 373430f712c9SDave Chinner ap->length = args.len; 373560b4984fSDarrick J. Wong if (!(ap->flags & XFS_BMAPI_COWFORK)) 373630f712c9SDave Chinner ap->ip->i_d.di_nblocks += args.len; 373730f712c9SDave Chinner xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); 373830f712c9SDave Chinner if (ap->wasdel) 373930f712c9SDave Chinner ap->ip->i_delayed_blks -= args.len; 374030f712c9SDave Chinner /* 374130f712c9SDave Chinner * Adjust the disk quota also. This was reserved 374230f712c9SDave Chinner * earlier. 374330f712c9SDave Chinner */ 374430f712c9SDave Chinner xfs_trans_mod_dquot_byino(ap->tp, ap->ip, 374530f712c9SDave Chinner ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : 374630f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 374730f712c9SDave Chinner (long) args.len); 374830f712c9SDave Chinner } else { 374930f712c9SDave Chinner ap->blkno = NULLFSBLOCK; 375030f712c9SDave Chinner ap->length = 0; 375130f712c9SDave Chinner } 375230f712c9SDave Chinner return 0; 375330f712c9SDave Chinner } 375430f712c9SDave Chinner 375530f712c9SDave Chinner /* 375630f712c9SDave Chinner * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. 375730f712c9SDave Chinner * It figures out where to ask the underlying allocator to put the new extent. 375830f712c9SDave Chinner */ 375930f712c9SDave Chinner STATIC int 376030f712c9SDave Chinner xfs_bmap_alloc( 376130f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 376230f712c9SDave Chinner { 3763292378edSDave Chinner if (XFS_IS_REALTIME_INODE(ap->ip) && 3764292378edSDave Chinner xfs_alloc_is_userdata(ap->datatype)) 376530f712c9SDave Chinner return xfs_bmap_rtalloc(ap); 376630f712c9SDave Chinner return xfs_bmap_btalloc(ap); 376730f712c9SDave Chinner } 376830f712c9SDave Chinner 37690a0af28cSDarrick J. Wong /* Trim extent to fit a logical block range. */ 37700a0af28cSDarrick J. Wong void 37710a0af28cSDarrick J. Wong xfs_trim_extent( 37720a0af28cSDarrick J. Wong struct xfs_bmbt_irec *irec, 37730a0af28cSDarrick J. Wong xfs_fileoff_t bno, 37740a0af28cSDarrick J. Wong xfs_filblks_t len) 37750a0af28cSDarrick J. Wong { 37760a0af28cSDarrick J. Wong xfs_fileoff_t distance; 37770a0af28cSDarrick J. Wong xfs_fileoff_t end = bno + len; 37780a0af28cSDarrick J. Wong 37790a0af28cSDarrick J. Wong if (irec->br_startoff + irec->br_blockcount <= bno || 37800a0af28cSDarrick J. Wong irec->br_startoff >= end) { 37810a0af28cSDarrick J. Wong irec->br_blockcount = 0; 37820a0af28cSDarrick J. Wong return; 37830a0af28cSDarrick J. Wong } 37840a0af28cSDarrick J. Wong 37850a0af28cSDarrick J. Wong if (irec->br_startoff < bno) { 37860a0af28cSDarrick J. Wong distance = bno - irec->br_startoff; 37870a0af28cSDarrick J. Wong if (isnullstartblock(irec->br_startblock)) 37880a0af28cSDarrick J. Wong irec->br_startblock = DELAYSTARTBLOCK; 37890a0af28cSDarrick J. Wong if (irec->br_startblock != DELAYSTARTBLOCK && 37900a0af28cSDarrick J. Wong irec->br_startblock != HOLESTARTBLOCK) 37910a0af28cSDarrick J. Wong irec->br_startblock += distance; 37920a0af28cSDarrick J. Wong irec->br_startoff += distance; 37930a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 37940a0af28cSDarrick J. Wong } 37950a0af28cSDarrick J. Wong 37960a0af28cSDarrick J. Wong if (end < irec->br_startoff + irec->br_blockcount) { 37970a0af28cSDarrick J. Wong distance = irec->br_startoff + irec->br_blockcount - end; 37980a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 37990a0af28cSDarrick J. Wong } 38000a0af28cSDarrick J. Wong } 38010a0af28cSDarrick J. Wong 380240214d12SBrian Foster /* trim extent to within eof */ 380340214d12SBrian Foster void 380440214d12SBrian Foster xfs_trim_extent_eof( 380540214d12SBrian Foster struct xfs_bmbt_irec *irec, 380640214d12SBrian Foster struct xfs_inode *ip) 380740214d12SBrian Foster 380840214d12SBrian Foster { 380940214d12SBrian Foster xfs_trim_extent(irec, 0, XFS_B_TO_FSB(ip->i_mount, 381040214d12SBrian Foster i_size_read(VFS_I(ip)))); 381140214d12SBrian Foster } 381240214d12SBrian Foster 381330f712c9SDave Chinner /* 381430f712c9SDave Chinner * Trim the returned map to the required bounds 381530f712c9SDave Chinner */ 381630f712c9SDave Chinner STATIC void 381730f712c9SDave Chinner xfs_bmapi_trim_map( 381830f712c9SDave Chinner struct xfs_bmbt_irec *mval, 381930f712c9SDave Chinner struct xfs_bmbt_irec *got, 382030f712c9SDave Chinner xfs_fileoff_t *bno, 382130f712c9SDave Chinner xfs_filblks_t len, 382230f712c9SDave Chinner xfs_fileoff_t obno, 382330f712c9SDave Chinner xfs_fileoff_t end, 382430f712c9SDave Chinner int n, 382530f712c9SDave Chinner int flags) 382630f712c9SDave Chinner { 382730f712c9SDave Chinner if ((flags & XFS_BMAPI_ENTIRE) || 382830f712c9SDave Chinner got->br_startoff + got->br_blockcount <= obno) { 382930f712c9SDave Chinner *mval = *got; 383030f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 383130f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 383230f712c9SDave Chinner return; 383330f712c9SDave Chinner } 383430f712c9SDave Chinner 383530f712c9SDave Chinner if (obno > *bno) 383630f712c9SDave Chinner *bno = obno; 383730f712c9SDave Chinner ASSERT((*bno >= obno) || (n == 0)); 383830f712c9SDave Chinner ASSERT(*bno < end); 383930f712c9SDave Chinner mval->br_startoff = *bno; 384030f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 384130f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 384230f712c9SDave Chinner else 384330f712c9SDave Chinner mval->br_startblock = got->br_startblock + 384430f712c9SDave Chinner (*bno - got->br_startoff); 384530f712c9SDave Chinner /* 384630f712c9SDave Chinner * Return the minimum of what we got and what we asked for for 384730f712c9SDave Chinner * the length. We can use the len variable here because it is 384830f712c9SDave Chinner * modified below and we could have been there before coming 384930f712c9SDave Chinner * here if the first part of the allocation didn't overlap what 385030f712c9SDave Chinner * was asked for. 385130f712c9SDave Chinner */ 385230f712c9SDave Chinner mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, 385330f712c9SDave Chinner got->br_blockcount - (*bno - got->br_startoff)); 385430f712c9SDave Chinner mval->br_state = got->br_state; 385530f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 385630f712c9SDave Chinner return; 385730f712c9SDave Chinner } 385830f712c9SDave Chinner 385930f712c9SDave Chinner /* 386030f712c9SDave Chinner * Update and validate the extent map to return 386130f712c9SDave Chinner */ 386230f712c9SDave Chinner STATIC void 386330f712c9SDave Chinner xfs_bmapi_update_map( 386430f712c9SDave Chinner struct xfs_bmbt_irec **map, 386530f712c9SDave Chinner xfs_fileoff_t *bno, 386630f712c9SDave Chinner xfs_filblks_t *len, 386730f712c9SDave Chinner xfs_fileoff_t obno, 386830f712c9SDave Chinner xfs_fileoff_t end, 386930f712c9SDave Chinner int *n, 387030f712c9SDave Chinner int flags) 387130f712c9SDave Chinner { 387230f712c9SDave Chinner xfs_bmbt_irec_t *mval = *map; 387330f712c9SDave Chinner 387430f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || 387530f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= end)); 387630f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || 387730f712c9SDave Chinner (mval->br_startoff < obno)); 387830f712c9SDave Chinner 387930f712c9SDave Chinner *bno = mval->br_startoff + mval->br_blockcount; 388030f712c9SDave Chinner *len = end - *bno; 388130f712c9SDave Chinner if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { 388230f712c9SDave Chinner /* update previous map with new information */ 388330f712c9SDave Chinner ASSERT(mval->br_startblock == mval[-1].br_startblock); 388430f712c9SDave Chinner ASSERT(mval->br_blockcount > mval[-1].br_blockcount); 388530f712c9SDave Chinner ASSERT(mval->br_state == mval[-1].br_state); 388630f712c9SDave Chinner mval[-1].br_blockcount = mval->br_blockcount; 388730f712c9SDave Chinner mval[-1].br_state = mval->br_state; 388830f712c9SDave Chinner } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && 388930f712c9SDave Chinner mval[-1].br_startblock != DELAYSTARTBLOCK && 389030f712c9SDave Chinner mval[-1].br_startblock != HOLESTARTBLOCK && 389130f712c9SDave Chinner mval->br_startblock == mval[-1].br_startblock + 389230f712c9SDave Chinner mval[-1].br_blockcount && 389330f712c9SDave Chinner ((flags & XFS_BMAPI_IGSTATE) || 389430f712c9SDave Chinner mval[-1].br_state == mval->br_state)) { 389530f712c9SDave Chinner ASSERT(mval->br_startoff == 389630f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount); 389730f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 389830f712c9SDave Chinner } else if (*n > 0 && 389930f712c9SDave Chinner mval->br_startblock == DELAYSTARTBLOCK && 390030f712c9SDave Chinner mval[-1].br_startblock == DELAYSTARTBLOCK && 390130f712c9SDave Chinner mval->br_startoff == 390230f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount) { 390330f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 390430f712c9SDave Chinner mval[-1].br_state = mval->br_state; 390530f712c9SDave Chinner } else if (!((*n == 0) && 390630f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= 390730f712c9SDave Chinner obno))) { 390830f712c9SDave Chinner mval++; 390930f712c9SDave Chinner (*n)++; 391030f712c9SDave Chinner } 391130f712c9SDave Chinner *map = mval; 391230f712c9SDave Chinner } 391330f712c9SDave Chinner 391430f712c9SDave Chinner /* 391530f712c9SDave Chinner * Map file blocks to filesystem blocks without allocation. 391630f712c9SDave Chinner */ 391730f712c9SDave Chinner int 391830f712c9SDave Chinner xfs_bmapi_read( 391930f712c9SDave Chinner struct xfs_inode *ip, 392030f712c9SDave Chinner xfs_fileoff_t bno, 392130f712c9SDave Chinner xfs_filblks_t len, 392230f712c9SDave Chinner struct xfs_bmbt_irec *mval, 392330f712c9SDave Chinner int *nmap, 392430f712c9SDave Chinner int flags) 392530f712c9SDave Chinner { 392630f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 392730f712c9SDave Chinner struct xfs_ifork *ifp; 392830f712c9SDave Chinner struct xfs_bmbt_irec got; 392930f712c9SDave Chinner xfs_fileoff_t obno; 393030f712c9SDave Chinner xfs_fileoff_t end; 3931334f3423SChristoph Hellwig xfs_extnum_t idx; 393230f712c9SDave Chinner int error; 3933334f3423SChristoph Hellwig bool eof = false; 393430f712c9SDave Chinner int n = 0; 39353993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 393630f712c9SDave Chinner 393730f712c9SDave Chinner ASSERT(*nmap >= 1); 393830f712c9SDave Chinner ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| 39393993baebSDarrick J. Wong XFS_BMAPI_IGSTATE|XFS_BMAPI_COWFORK))); 394030f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); 394130f712c9SDave Chinner 394230f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 394330f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 394430f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 39459e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 394630f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); 39472451337dSDave Chinner return -EFSCORRUPTED; 394830f712c9SDave Chinner } 394930f712c9SDave Chinner 395030f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 39512451337dSDave Chinner return -EIO; 395230f712c9SDave Chinner 3953ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapr); 395430f712c9SDave Chinner 395530f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 395630f712c9SDave Chinner 39573993baebSDarrick J. Wong /* No CoW fork? Return a hole. */ 39583993baebSDarrick J. Wong if (whichfork == XFS_COW_FORK && !ifp) { 39593993baebSDarrick J. Wong mval->br_startoff = bno; 39603993baebSDarrick J. Wong mval->br_startblock = HOLESTARTBLOCK; 39613993baebSDarrick J. Wong mval->br_blockcount = len; 39623993baebSDarrick J. Wong mval->br_state = XFS_EXT_NORM; 39633993baebSDarrick J. Wong *nmap = 1; 39643993baebSDarrick J. Wong return 0; 39653993baebSDarrick J. Wong } 39663993baebSDarrick J. Wong 396730f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 396830f712c9SDave Chinner error = xfs_iread_extents(NULL, ip, whichfork); 396930f712c9SDave Chinner if (error) 397030f712c9SDave Chinner return error; 397130f712c9SDave Chinner } 397230f712c9SDave Chinner 3973334f3423SChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &idx, &got)) 3974334f3423SChristoph Hellwig eof = true; 397530f712c9SDave Chinner end = bno + len; 397630f712c9SDave Chinner obno = bno; 397730f712c9SDave Chinner 397830f712c9SDave Chinner while (bno < end && n < *nmap) { 397930f712c9SDave Chinner /* Reading past eof, act as though there's a hole up to end. */ 398030f712c9SDave Chinner if (eof) 398130f712c9SDave Chinner got.br_startoff = end; 398230f712c9SDave Chinner if (got.br_startoff > bno) { 398330f712c9SDave Chinner /* Reading in a hole. */ 398430f712c9SDave Chinner mval->br_startoff = bno; 398530f712c9SDave Chinner mval->br_startblock = HOLESTARTBLOCK; 398630f712c9SDave Chinner mval->br_blockcount = 398730f712c9SDave Chinner XFS_FILBLKS_MIN(len, got.br_startoff - bno); 398830f712c9SDave Chinner mval->br_state = XFS_EXT_NORM; 398930f712c9SDave Chinner bno += mval->br_blockcount; 399030f712c9SDave Chinner len -= mval->br_blockcount; 399130f712c9SDave Chinner mval++; 399230f712c9SDave Chinner n++; 399330f712c9SDave Chinner continue; 399430f712c9SDave Chinner } 399530f712c9SDave Chinner 399630f712c9SDave Chinner /* set up the extent map to return. */ 399730f712c9SDave Chinner xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); 399830f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 399930f712c9SDave Chinner 400030f712c9SDave Chinner /* If we're done, stop now. */ 400130f712c9SDave Chinner if (bno >= end || n >= *nmap) 400230f712c9SDave Chinner break; 400330f712c9SDave Chinner 400430f712c9SDave Chinner /* Else go on to the next record. */ 4005334f3423SChristoph Hellwig if (!xfs_iext_get_extent(ifp, ++idx, &got)) 4006334f3423SChristoph Hellwig eof = true; 400730f712c9SDave Chinner } 400830f712c9SDave Chinner *nmap = n; 400930f712c9SDave Chinner return 0; 401030f712c9SDave Chinner } 401130f712c9SDave Chinner 4012f65e6fadSBrian Foster /* 4013f65e6fadSBrian Foster * Add a delayed allocation extent to an inode. Blocks are reserved from the 4014f65e6fadSBrian Foster * global pool and the extent inserted into the inode in-core extent tree. 4015f65e6fadSBrian Foster * 4016f65e6fadSBrian Foster * On entry, got refers to the first extent beyond the offset of the extent to 4017f65e6fadSBrian Foster * allocate or eof is specified if no such extent exists. On return, got refers 4018f65e6fadSBrian Foster * to the extent record that was inserted to the inode fork. 4019f65e6fadSBrian Foster * 4020f65e6fadSBrian Foster * Note that the allocated extent may have been merged with contiguous extents 4021f65e6fadSBrian Foster * during insertion into the inode fork. Thus, got does not reflect the current 4022f65e6fadSBrian Foster * state of the inode fork on return. If necessary, the caller can use lastx to 4023f65e6fadSBrian Foster * look up the updated record in the inode fork. 4024f65e6fadSBrian Foster */ 402551446f5bSChristoph Hellwig int 402630f712c9SDave Chinner xfs_bmapi_reserve_delalloc( 402730f712c9SDave Chinner struct xfs_inode *ip, 4028be51f811SDarrick J. Wong int whichfork, 4029974ae922SBrian Foster xfs_fileoff_t off, 403030f712c9SDave Chinner xfs_filblks_t len, 4031974ae922SBrian Foster xfs_filblks_t prealloc, 403230f712c9SDave Chinner struct xfs_bmbt_irec *got, 403330f712c9SDave Chinner xfs_extnum_t *lastx, 403430f712c9SDave Chinner int eof) 403530f712c9SDave Chinner { 403630f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 4037be51f811SDarrick J. Wong struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 403830f712c9SDave Chinner xfs_extlen_t alen; 403930f712c9SDave Chinner xfs_extlen_t indlen; 404030f712c9SDave Chinner char rt = XFS_IS_REALTIME_INODE(ip); 404130f712c9SDave Chinner xfs_extlen_t extsz; 404230f712c9SDave Chinner int error; 4043974ae922SBrian Foster xfs_fileoff_t aoff = off; 404430f712c9SDave Chinner 4045974ae922SBrian Foster /* 4046974ae922SBrian Foster * Cap the alloc length. Keep track of prealloc so we know whether to 4047974ae922SBrian Foster * tag the inode before we return. 4048974ae922SBrian Foster */ 4049974ae922SBrian Foster alen = XFS_FILBLKS_MIN(len + prealloc, MAXEXTLEN); 405030f712c9SDave Chinner if (!eof) 405130f712c9SDave Chinner alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); 4052974ae922SBrian Foster if (prealloc && alen >= len) 4053974ae922SBrian Foster prealloc = alen - len; 405430f712c9SDave Chinner 405530f712c9SDave Chinner /* Figure out the extent size, adjust alen */ 4056f7ca3522SDarrick J. Wong if (whichfork == XFS_COW_FORK) 4057f7ca3522SDarrick J. Wong extsz = xfs_get_cowextsz_hint(ip); 4058f7ca3522SDarrick J. Wong else 405930f712c9SDave Chinner extsz = xfs_get_extsz_hint(ip); 406030f712c9SDave Chinner if (extsz) { 406165c5f419SChristoph Hellwig struct xfs_bmbt_irec prev; 406265c5f419SChristoph Hellwig 406365c5f419SChristoph Hellwig if (!xfs_iext_get_extent(ifp, *lastx - 1, &prev)) 406465c5f419SChristoph Hellwig prev.br_startoff = NULLFILEOFF; 406565c5f419SChristoph Hellwig 406665c5f419SChristoph Hellwig error = xfs_bmap_extsize_align(mp, got, &prev, extsz, rt, eof, 406730f712c9SDave Chinner 1, 0, &aoff, &alen); 406830f712c9SDave Chinner ASSERT(!error); 406930f712c9SDave Chinner } 407030f712c9SDave Chinner 407130f712c9SDave Chinner if (rt) 407230f712c9SDave Chinner extsz = alen / mp->m_sb.sb_rextsize; 407330f712c9SDave Chinner 407430f712c9SDave Chinner /* 407530f712c9SDave Chinner * Make a transaction-less quota reservation for delayed allocation 407630f712c9SDave Chinner * blocks. This number gets adjusted later. We return if we haven't 407730f712c9SDave Chinner * allocated blocks already inside this loop. 407830f712c9SDave Chinner */ 407930f712c9SDave Chinner error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, 408030f712c9SDave Chinner rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 408130f712c9SDave Chinner if (error) 408230f712c9SDave Chinner return error; 408330f712c9SDave Chinner 408430f712c9SDave Chinner /* 408530f712c9SDave Chinner * Split changing sb for alen and indlen since they could be coming 408630f712c9SDave Chinner * from different places. 408730f712c9SDave Chinner */ 408830f712c9SDave Chinner indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); 408930f712c9SDave Chinner ASSERT(indlen > 0); 409030f712c9SDave Chinner 409130f712c9SDave Chinner if (rt) { 4092bab98bbeSDave Chinner error = xfs_mod_frextents(mp, -((int64_t)extsz)); 409330f712c9SDave Chinner } else { 40940d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); 409530f712c9SDave Chinner } 409630f712c9SDave Chinner 409730f712c9SDave Chinner if (error) 409830f712c9SDave Chinner goto out_unreserve_quota; 409930f712c9SDave Chinner 41000d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); 410130f712c9SDave Chinner if (error) 410230f712c9SDave Chinner goto out_unreserve_blocks; 410330f712c9SDave Chinner 410430f712c9SDave Chinner 410530f712c9SDave Chinner ip->i_delayed_blks += alen; 410630f712c9SDave Chinner 410730f712c9SDave Chinner got->br_startoff = aoff; 410830f712c9SDave Chinner got->br_startblock = nullstartblock(indlen); 410930f712c9SDave Chinner got->br_blockcount = alen; 411030f712c9SDave Chinner got->br_state = XFS_EXT_NORM; 411130f712c9SDave Chinner 4112f65e6fadSBrian Foster xfs_bmap_add_extent_hole_delay(ip, whichfork, lastx, got); 411330f712c9SDave Chinner 4114974ae922SBrian Foster /* 4115974ae922SBrian Foster * Tag the inode if blocks were preallocated. Note that COW fork 4116974ae922SBrian Foster * preallocation can occur at the start or end of the extent, even when 4117974ae922SBrian Foster * prealloc == 0, so we must also check the aligned offset and length. 4118974ae922SBrian Foster */ 4119974ae922SBrian Foster if (whichfork == XFS_DATA_FORK && prealloc) 4120974ae922SBrian Foster xfs_inode_set_eofblocks_tag(ip); 4121974ae922SBrian Foster if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len)) 4122974ae922SBrian Foster xfs_inode_set_cowblocks_tag(ip); 4123974ae922SBrian Foster 412430f712c9SDave Chinner return 0; 412530f712c9SDave Chinner 412630f712c9SDave Chinner out_unreserve_blocks: 412730f712c9SDave Chinner if (rt) 4128bab98bbeSDave Chinner xfs_mod_frextents(mp, extsz); 412930f712c9SDave Chinner else 41300d485adaSDave Chinner xfs_mod_fdblocks(mp, alen, false); 413130f712c9SDave Chinner out_unreserve_quota: 413230f712c9SDave Chinner if (XFS_IS_QUOTA_ON(mp)) 413330f712c9SDave Chinner xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? 413430f712c9SDave Chinner XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 413530f712c9SDave Chinner return error; 413630f712c9SDave Chinner } 413730f712c9SDave Chinner 41387f8a058fSDave Chinner static int 41397f8a058fSDave Chinner xfs_bmapi_allocate( 414030f712c9SDave Chinner struct xfs_bmalloca *bma) 414130f712c9SDave Chinner { 414230f712c9SDave Chinner struct xfs_mount *mp = bma->ip->i_mount; 414360b4984fSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(bma->flags); 414430f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 414530f712c9SDave Chinner int tmp_logflags = 0; 414630f712c9SDave Chinner int error; 414730f712c9SDave Chinner 414830f712c9SDave Chinner ASSERT(bma->length > 0); 414930f712c9SDave Chinner 415030f712c9SDave Chinner /* 415130f712c9SDave Chinner * For the wasdelay case, we could also just allocate the stuff asked 415230f712c9SDave Chinner * for in this bmap call but that wouldn't be as good. 415330f712c9SDave Chinner */ 415430f712c9SDave Chinner if (bma->wasdel) { 415530f712c9SDave Chinner bma->length = (xfs_extlen_t)bma->got.br_blockcount; 415630f712c9SDave Chinner bma->offset = bma->got.br_startoff; 4157e3f0f756SChristoph Hellwig if (bma->idx) 4158e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, bma->idx - 1, &bma->prev); 415930f712c9SDave Chinner } else { 416030f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); 416130f712c9SDave Chinner if (!bma->eof) 416230f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, 416330f712c9SDave Chinner bma->got.br_startoff - bma->offset); 416430f712c9SDave Chinner } 416530f712c9SDave Chinner 416630f712c9SDave Chinner /* 4167292378edSDave Chinner * Set the data type being allocated. For the data fork, the first data 4168292378edSDave Chinner * in the file is treated differently to all other allocations. For the 4169292378edSDave Chinner * attribute fork, we only need to ensure the allocated range is not on 4170292378edSDave Chinner * the busy list. 417130f712c9SDave Chinner */ 417230f712c9SDave Chinner if (!(bma->flags & XFS_BMAPI_METADATA)) { 4173292378edSDave Chinner bma->datatype = XFS_ALLOC_NOBUSY; 4174292378edSDave Chinner if (whichfork == XFS_DATA_FORK) { 4175292378edSDave Chinner if (bma->offset == 0) 4176292378edSDave Chinner bma->datatype |= XFS_ALLOC_INITIAL_USER_DATA; 4177292378edSDave Chinner else 4178292378edSDave Chinner bma->datatype |= XFS_ALLOC_USERDATA; 4179292378edSDave Chinner } 41803fbbbea3SDave Chinner if (bma->flags & XFS_BMAPI_ZERO) 4181292378edSDave Chinner bma->datatype |= XFS_ALLOC_USERDATA_ZERO; 418230f712c9SDave Chinner } 418330f712c9SDave Chinner 418430f712c9SDave Chinner bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; 418530f712c9SDave Chinner 418630f712c9SDave Chinner /* 418730f712c9SDave Chinner * Only want to do the alignment at the eof if it is userdata and 418830f712c9SDave Chinner * allocation length is larger than a stripe unit. 418930f712c9SDave Chinner */ 419030f712c9SDave Chinner if (mp->m_dalign && bma->length >= mp->m_dalign && 419130f712c9SDave Chinner !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { 419230f712c9SDave Chinner error = xfs_bmap_isaeof(bma, whichfork); 419330f712c9SDave Chinner if (error) 419430f712c9SDave Chinner return error; 419530f712c9SDave Chinner } 419630f712c9SDave Chinner 419730f712c9SDave Chinner error = xfs_bmap_alloc(bma); 419830f712c9SDave Chinner if (error) 419930f712c9SDave Chinner return error; 420030f712c9SDave Chinner 420130f712c9SDave Chinner if (bma->cur) 420230f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 420330f712c9SDave Chinner if (bma->blkno == NULLFSBLOCK) 420430f712c9SDave Chinner return 0; 420530f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 420630f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); 420730f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 42082c3234d1SDarrick J. Wong bma->cur->bc_private.b.dfops = bma->dfops; 420930f712c9SDave Chinner } 421030f712c9SDave Chinner /* 421130f712c9SDave Chinner * Bump the number of extents we've allocated 421230f712c9SDave Chinner * in this call. 421330f712c9SDave Chinner */ 421430f712c9SDave Chinner bma->nallocs++; 421530f712c9SDave Chinner 421630f712c9SDave Chinner if (bma->cur) 421730f712c9SDave Chinner bma->cur->bc_private.b.flags = 421830f712c9SDave Chinner bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; 421930f712c9SDave Chinner 422030f712c9SDave Chinner bma->got.br_startoff = bma->offset; 422130f712c9SDave Chinner bma->got.br_startblock = bma->blkno; 422230f712c9SDave Chinner bma->got.br_blockcount = bma->length; 422330f712c9SDave Chinner bma->got.br_state = XFS_EXT_NORM; 422430f712c9SDave Chinner 422530f712c9SDave Chinner /* 422605a630d7SDarrick J. Wong * In the data fork, a wasdelay extent has been initialized, so 422705a630d7SDarrick J. Wong * shouldn't be flagged as unwritten. 422805a630d7SDarrick J. Wong * 422905a630d7SDarrick J. Wong * For the cow fork, however, we convert delalloc reservations 423005a630d7SDarrick J. Wong * (extents allocated for speculative preallocation) to 423105a630d7SDarrick J. Wong * allocated unwritten extents, and only convert the unwritten 423205a630d7SDarrick J. Wong * extents to real extents when we're about to write the data. 423330f712c9SDave Chinner */ 423405a630d7SDarrick J. Wong if ((!bma->wasdel || (bma->flags & XFS_BMAPI_COWFORK)) && 423505a630d7SDarrick J. Wong (bma->flags & XFS_BMAPI_PREALLOC) && 423630f712c9SDave Chinner xfs_sb_version_hasextflgbit(&mp->m_sb)) 423730f712c9SDave Chinner bma->got.br_state = XFS_EXT_UNWRITTEN; 423830f712c9SDave Chinner 423930f712c9SDave Chinner if (bma->wasdel) 424060b4984fSDarrick J. Wong error = xfs_bmap_add_extent_delay_real(bma, whichfork); 424130f712c9SDave Chinner else 42426d04558fSChristoph Hellwig error = xfs_bmap_add_extent_hole_real(bma->tp, bma->ip, 42436d04558fSChristoph Hellwig whichfork, &bma->idx, &bma->cur, &bma->got, 42446d04558fSChristoph Hellwig bma->firstblock, bma->dfops, &bma->logflags); 424530f712c9SDave Chinner 424630f712c9SDave Chinner bma->logflags |= tmp_logflags; 424730f712c9SDave Chinner if (error) 424830f712c9SDave Chinner return error; 424930f712c9SDave Chinner 425030f712c9SDave Chinner /* 425130f712c9SDave Chinner * Update our extent pointer, given that xfs_bmap_add_extent_delay_real 425230f712c9SDave Chinner * or xfs_bmap_add_extent_hole_real might have merged it into one of 425330f712c9SDave Chinner * the neighbouring ones. 425430f712c9SDave Chinner */ 4255e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, bma->idx, &bma->got); 425630f712c9SDave Chinner 425730f712c9SDave Chinner ASSERT(bma->got.br_startoff <= bma->offset); 425830f712c9SDave Chinner ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= 425930f712c9SDave Chinner bma->offset + bma->length); 426030f712c9SDave Chinner ASSERT(bma->got.br_state == XFS_EXT_NORM || 426130f712c9SDave Chinner bma->got.br_state == XFS_EXT_UNWRITTEN); 426230f712c9SDave Chinner return 0; 426330f712c9SDave Chinner } 426430f712c9SDave Chinner 426530f712c9SDave Chinner STATIC int 426630f712c9SDave Chinner xfs_bmapi_convert_unwritten( 426730f712c9SDave Chinner struct xfs_bmalloca *bma, 426830f712c9SDave Chinner struct xfs_bmbt_irec *mval, 426930f712c9SDave Chinner xfs_filblks_t len, 427030f712c9SDave Chinner int flags) 427130f712c9SDave Chinner { 42723993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 427330f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 427430f712c9SDave Chinner int tmp_logflags = 0; 427530f712c9SDave Chinner int error; 427630f712c9SDave Chinner 427730f712c9SDave Chinner /* check if we need to do unwritten->real conversion */ 427830f712c9SDave Chinner if (mval->br_state == XFS_EXT_UNWRITTEN && 427930f712c9SDave Chinner (flags & XFS_BMAPI_PREALLOC)) 428030f712c9SDave Chinner return 0; 428130f712c9SDave Chinner 428230f712c9SDave Chinner /* check if we need to do real->unwritten conversion */ 428330f712c9SDave Chinner if (mval->br_state == XFS_EXT_NORM && 428430f712c9SDave Chinner (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != 428530f712c9SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) 428630f712c9SDave Chinner return 0; 428730f712c9SDave Chinner 428830f712c9SDave Chinner /* 428930f712c9SDave Chinner * Modify (by adding) the state flag, if writing. 429030f712c9SDave Chinner */ 429130f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 429230f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 429330f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, 429430f712c9SDave Chinner bma->ip, whichfork); 429530f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 42962c3234d1SDarrick J. Wong bma->cur->bc_private.b.dfops = bma->dfops; 429730f712c9SDave Chinner } 429830f712c9SDave Chinner mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) 429930f712c9SDave Chinner ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; 430030f712c9SDave Chinner 43013fbbbea3SDave Chinner /* 43023fbbbea3SDave Chinner * Before insertion into the bmbt, zero the range being converted 43033fbbbea3SDave Chinner * if required. 43043fbbbea3SDave Chinner */ 43053fbbbea3SDave Chinner if (flags & XFS_BMAPI_ZERO) { 43063fbbbea3SDave Chinner error = xfs_zero_extent(bma->ip, mval->br_startblock, 43073fbbbea3SDave Chinner mval->br_blockcount); 43083fbbbea3SDave Chinner if (error) 43093fbbbea3SDave Chinner return error; 43103fbbbea3SDave Chinner } 43113fbbbea3SDave Chinner 431205a630d7SDarrick J. Wong error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, whichfork, 431305a630d7SDarrick J. Wong &bma->idx, &bma->cur, mval, bma->firstblock, bma->dfops, 431430f712c9SDave Chinner &tmp_logflags); 43152e588a46SBrian Foster /* 43162e588a46SBrian Foster * Log the inode core unconditionally in the unwritten extent conversion 43172e588a46SBrian Foster * path because the conversion might not have done so (e.g., if the 43182e588a46SBrian Foster * extent count hasn't changed). We need to make sure the inode is dirty 43192e588a46SBrian Foster * in the transaction for the sake of fsync(), even if nothing has 43202e588a46SBrian Foster * changed, because fsync() will not force the log for this transaction 43212e588a46SBrian Foster * unless it sees the inode pinned. 432205a630d7SDarrick J. Wong * 432305a630d7SDarrick J. Wong * Note: If we're only converting cow fork extents, there aren't 432405a630d7SDarrick J. Wong * any on-disk updates to make, so we don't need to log anything. 43252e588a46SBrian Foster */ 432605a630d7SDarrick J. Wong if (whichfork != XFS_COW_FORK) 43272e588a46SBrian Foster bma->logflags |= tmp_logflags | XFS_ILOG_CORE; 432830f712c9SDave Chinner if (error) 432930f712c9SDave Chinner return error; 433030f712c9SDave Chinner 433130f712c9SDave Chinner /* 433230f712c9SDave Chinner * Update our extent pointer, given that 433330f712c9SDave Chinner * xfs_bmap_add_extent_unwritten_real might have merged it into one 433430f712c9SDave Chinner * of the neighbouring ones. 433530f712c9SDave Chinner */ 4336e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, bma->idx, &bma->got); 433730f712c9SDave Chinner 433830f712c9SDave Chinner /* 433930f712c9SDave Chinner * We may have combined previously unwritten space with written space, 434030f712c9SDave Chinner * so generate another request. 434130f712c9SDave Chinner */ 434230f712c9SDave Chinner if (mval->br_blockcount < len) 43432451337dSDave Chinner return -EAGAIN; 434430f712c9SDave Chinner return 0; 434530f712c9SDave Chinner } 434630f712c9SDave Chinner 434730f712c9SDave Chinner /* 434830f712c9SDave Chinner * Map file blocks to filesystem blocks, and allocate blocks or convert the 434930f712c9SDave Chinner * extent state if necessary. Details behaviour is controlled by the flags 435030f712c9SDave Chinner * parameter. Only allocates blocks from a single allocation group, to avoid 435130f712c9SDave Chinner * locking problems. 435230f712c9SDave Chinner * 435330f712c9SDave Chinner * The returned value in "firstblock" from the first call in a transaction 435430f712c9SDave Chinner * must be remembered and presented to subsequent calls in "firstblock". 435530f712c9SDave Chinner * An upper bound for the number of blocks to be allocated is supplied to 435630f712c9SDave Chinner * the first call in "total"; if no allocation group has that many free 435730f712c9SDave Chinner * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). 435830f712c9SDave Chinner */ 435930f712c9SDave Chinner int 436030f712c9SDave Chinner xfs_bmapi_write( 436130f712c9SDave Chinner struct xfs_trans *tp, /* transaction pointer */ 436230f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 436330f712c9SDave Chinner xfs_fileoff_t bno, /* starting file offs. mapped */ 436430f712c9SDave Chinner xfs_filblks_t len, /* length to map in file */ 436530f712c9SDave Chinner int flags, /* XFS_BMAPI_... */ 436630f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first allocated block 436730f712c9SDave Chinner controls a.g. for allocs */ 436830f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed */ 436930f712c9SDave Chinner struct xfs_bmbt_irec *mval, /* output: map values */ 437030f712c9SDave Chinner int *nmap, /* i/o: mval size/count */ 43712c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops) /* i/o: list extents to free */ 437230f712c9SDave Chinner { 437330f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 437430f712c9SDave Chinner struct xfs_ifork *ifp; 437530f712c9SDave Chinner struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ 437630f712c9SDave Chinner xfs_fileoff_t end; /* end of mapped file region */ 43772d58f6efSChristoph Hellwig bool eof = false; /* after the end of extents */ 437830f712c9SDave Chinner int error; /* error return */ 437930f712c9SDave Chinner int n; /* current extent index */ 438030f712c9SDave Chinner xfs_fileoff_t obno; /* old block number (offset) */ 438130f712c9SDave Chinner int whichfork; /* data or attr fork */ 438230f712c9SDave Chinner 438330f712c9SDave Chinner #ifdef DEBUG 438430f712c9SDave Chinner xfs_fileoff_t orig_bno; /* original block number value */ 438530f712c9SDave Chinner int orig_flags; /* original flags arg value */ 438630f712c9SDave Chinner xfs_filblks_t orig_len; /* original value of len arg */ 438730f712c9SDave Chinner struct xfs_bmbt_irec *orig_mval; /* original value of mval */ 438830f712c9SDave Chinner int orig_nmap; /* original value of *nmap */ 438930f712c9SDave Chinner 439030f712c9SDave Chinner orig_bno = bno; 439130f712c9SDave Chinner orig_len = len; 439230f712c9SDave Chinner orig_flags = flags; 439330f712c9SDave Chinner orig_mval = mval; 439430f712c9SDave Chinner orig_nmap = *nmap; 439530f712c9SDave Chinner #endif 439660b4984fSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 439730f712c9SDave Chinner 439830f712c9SDave Chinner ASSERT(*nmap >= 1); 439930f712c9SDave Chinner ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); 440030f712c9SDave Chinner ASSERT(!(flags & XFS_BMAPI_IGSTATE)); 440105a630d7SDarrick J. Wong ASSERT(tp != NULL || 440205a630d7SDarrick J. Wong (flags & (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)) == 440305a630d7SDarrick J. Wong (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)); 440430f712c9SDave Chinner ASSERT(len > 0); 440530f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); 440630f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 44076ebd5a44SChristoph Hellwig ASSERT(!(flags & XFS_BMAPI_REMAP)); 440830f712c9SDave Chinner 44093fbbbea3SDave Chinner /* zeroing is for currently only for data extents, not metadata */ 44103fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != 44113fbbbea3SDave Chinner (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)); 44123fbbbea3SDave Chinner /* 44133fbbbea3SDave Chinner * we can allocate unwritten extents or pre-zero allocated blocks, 44143fbbbea3SDave Chinner * but it makes no sense to do both at once. This would result in 44153fbbbea3SDave Chinner * zeroing the unwritten extent twice, but it still being an 44163fbbbea3SDave Chinner * unwritten extent.... 44173fbbbea3SDave Chinner */ 44183fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)) != 44193fbbbea3SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)); 44203fbbbea3SDave Chinner 442130f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 442230f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 442330f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 44249e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 442530f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); 44262451337dSDave Chinner return -EFSCORRUPTED; 442730f712c9SDave Chinner } 442830f712c9SDave Chinner 442930f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 44302451337dSDave Chinner return -EIO; 443130f712c9SDave Chinner 443230f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 443330f712c9SDave Chinner 4434ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapw); 443530f712c9SDave Chinner 443630f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 443730f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) 443830f712c9SDave Chinner bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; 443930f712c9SDave Chinner else 444030f712c9SDave Chinner bma.minleft = 1; 444130f712c9SDave Chinner } else { 444230f712c9SDave Chinner bma.minleft = 0; 444330f712c9SDave Chinner } 444430f712c9SDave Chinner 444530f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 444630f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 444730f712c9SDave Chinner if (error) 444830f712c9SDave Chinner goto error0; 444930f712c9SDave Chinner } 445030f712c9SDave Chinner 445130f712c9SDave Chinner n = 0; 445230f712c9SDave Chinner end = bno + len; 445330f712c9SDave Chinner obno = bno; 445430f712c9SDave Chinner 44552d58f6efSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &bma.idx, &bma.got)) 44562d58f6efSChristoph Hellwig eof = true; 44572d58f6efSChristoph Hellwig if (!xfs_iext_get_extent(ifp, bma.idx - 1, &bma.prev)) 44582d58f6efSChristoph Hellwig bma.prev.br_startoff = NULLFILEOFF; 445930f712c9SDave Chinner bma.tp = tp; 446030f712c9SDave Chinner bma.ip = ip; 446130f712c9SDave Chinner bma.total = total; 4462292378edSDave Chinner bma.datatype = 0; 44632c3234d1SDarrick J. Wong bma.dfops = dfops; 446430f712c9SDave Chinner bma.firstblock = firstblock; 446530f712c9SDave Chinner 446630f712c9SDave Chinner while (bno < end && n < *nmap) { 4467d2b3964aSChristoph Hellwig bool need_alloc = false, wasdelay = false; 446830f712c9SDave Chinner 4469d2b3964aSChristoph Hellwig /* in hole or beyoned EOF? */ 4470d2b3964aSChristoph Hellwig if (eof || bma.got.br_startoff > bno) { 4471d2b3964aSChristoph Hellwig if (flags & XFS_BMAPI_DELALLOC) { 4472d2b3964aSChristoph Hellwig /* 4473d2b3964aSChristoph Hellwig * For the COW fork we can reasonably get a 4474d2b3964aSChristoph Hellwig * request for converting an extent that races 4475d2b3964aSChristoph Hellwig * with other threads already having converted 4476d2b3964aSChristoph Hellwig * part of it, as there converting COW to 4477d2b3964aSChristoph Hellwig * regular blocks is not protected using the 4478d2b3964aSChristoph Hellwig * IOLOCK. 4479d2b3964aSChristoph Hellwig */ 4480d2b3964aSChristoph Hellwig ASSERT(flags & XFS_BMAPI_COWFORK); 4481d2b3964aSChristoph Hellwig if (!(flags & XFS_BMAPI_COWFORK)) { 4482d2b3964aSChristoph Hellwig error = -EIO; 4483d2b3964aSChristoph Hellwig goto error0; 4484d2b3964aSChristoph Hellwig } 4485d2b3964aSChristoph Hellwig 4486d2b3964aSChristoph Hellwig if (eof || bno >= end) 4487d2b3964aSChristoph Hellwig break; 4488d2b3964aSChristoph Hellwig } else { 4489d2b3964aSChristoph Hellwig need_alloc = true; 4490d2b3964aSChristoph Hellwig } 44916ebd5a44SChristoph Hellwig } else if (isnullstartblock(bma.got.br_startblock)) { 4492d2b3964aSChristoph Hellwig wasdelay = true; 4493d2b3964aSChristoph Hellwig } 4494f65306eaSDarrick J. Wong 4495f65306eaSDarrick J. Wong /* 449630f712c9SDave Chinner * First, deal with the hole before the allocated space 449730f712c9SDave Chinner * that we found, if any. 449830f712c9SDave Chinner */ 4499d2b3964aSChristoph Hellwig if (need_alloc || wasdelay) { 450030f712c9SDave Chinner bma.eof = eof; 450130f712c9SDave Chinner bma.conv = !!(flags & XFS_BMAPI_CONVERT); 450230f712c9SDave Chinner bma.wasdel = wasdelay; 450330f712c9SDave Chinner bma.offset = bno; 450430f712c9SDave Chinner bma.flags = flags; 450530f712c9SDave Chinner 450630f712c9SDave Chinner /* 450730f712c9SDave Chinner * There's a 32/64 bit type mismatch between the 450830f712c9SDave Chinner * allocation length request (which can be 64 bits in 450930f712c9SDave Chinner * length) and the bma length request, which is 451030f712c9SDave Chinner * xfs_extlen_t and therefore 32 bits. Hence we have to 451130f712c9SDave Chinner * check for 32-bit overflows and handle them here. 451230f712c9SDave Chinner */ 451330f712c9SDave Chinner if (len > (xfs_filblks_t)MAXEXTLEN) 451430f712c9SDave Chinner bma.length = MAXEXTLEN; 451530f712c9SDave Chinner else 451630f712c9SDave Chinner bma.length = len; 451730f712c9SDave Chinner 451830f712c9SDave Chinner ASSERT(len > 0); 451930f712c9SDave Chinner ASSERT(bma.length > 0); 452030f712c9SDave Chinner error = xfs_bmapi_allocate(&bma); 452130f712c9SDave Chinner if (error) 452230f712c9SDave Chinner goto error0; 452330f712c9SDave Chinner if (bma.blkno == NULLFSBLOCK) 452430f712c9SDave Chinner break; 4525174edb0eSDarrick J. Wong 4526174edb0eSDarrick J. Wong /* 4527174edb0eSDarrick J. Wong * If this is a CoW allocation, record the data in 4528174edb0eSDarrick J. Wong * the refcount btree for orphan recovery. 4529174edb0eSDarrick J. Wong */ 4530174edb0eSDarrick J. Wong if (whichfork == XFS_COW_FORK) { 4531174edb0eSDarrick J. Wong error = xfs_refcount_alloc_cow_extent(mp, dfops, 4532174edb0eSDarrick J. Wong bma.blkno, bma.length); 4533174edb0eSDarrick J. Wong if (error) 4534174edb0eSDarrick J. Wong goto error0; 4535174edb0eSDarrick J. Wong } 453630f712c9SDave Chinner } 453730f712c9SDave Chinner 453830f712c9SDave Chinner /* Deal with the allocated space we found. */ 453930f712c9SDave Chinner xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, 454030f712c9SDave Chinner end, n, flags); 454130f712c9SDave Chinner 454230f712c9SDave Chinner /* Execute unwritten extent conversion if necessary */ 454330f712c9SDave Chinner error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); 45442451337dSDave Chinner if (error == -EAGAIN) 454530f712c9SDave Chinner continue; 454630f712c9SDave Chinner if (error) 454730f712c9SDave Chinner goto error0; 454830f712c9SDave Chinner 454930f712c9SDave Chinner /* update the extent map to return */ 455030f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 455130f712c9SDave Chinner 455230f712c9SDave Chinner /* 455330f712c9SDave Chinner * If we're done, stop now. Stop when we've allocated 455430f712c9SDave Chinner * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise 455530f712c9SDave Chinner * the transaction may get too big. 455630f712c9SDave Chinner */ 455730f712c9SDave Chinner if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) 455830f712c9SDave Chinner break; 455930f712c9SDave Chinner 456030f712c9SDave Chinner /* Else go on to the next record. */ 456130f712c9SDave Chinner bma.prev = bma.got; 45622d58f6efSChristoph Hellwig if (!xfs_iext_get_extent(ifp, ++bma.idx, &bma.got)) 45632d58f6efSChristoph Hellwig eof = true; 456430f712c9SDave Chinner } 456530f712c9SDave Chinner *nmap = n; 456630f712c9SDave Chinner 456730f712c9SDave Chinner /* 456830f712c9SDave Chinner * Transform from btree to extents, give it cur. 456930f712c9SDave Chinner */ 457030f712c9SDave Chinner if (xfs_bmap_wants_extents(ip, whichfork)) { 457130f712c9SDave Chinner int tmp_logflags = 0; 457230f712c9SDave Chinner 457330f712c9SDave Chinner ASSERT(bma.cur); 457430f712c9SDave Chinner error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, 457530f712c9SDave Chinner &tmp_logflags, whichfork); 457630f712c9SDave Chinner bma.logflags |= tmp_logflags; 457730f712c9SDave Chinner if (error) 457830f712c9SDave Chinner goto error0; 457930f712c9SDave Chinner } 458030f712c9SDave Chinner 458130f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || 458230f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) > 458330f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork)); 458430f712c9SDave Chinner error = 0; 458530f712c9SDave Chinner error0: 458630f712c9SDave Chinner /* 458730f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 458830f712c9SDave Chinner * logging the extent records if we've converted to btree format. 458930f712c9SDave Chinner */ 459030f712c9SDave Chinner if ((bma.logflags & xfs_ilog_fext(whichfork)) && 459130f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 459230f712c9SDave Chinner bma.logflags &= ~xfs_ilog_fext(whichfork); 459330f712c9SDave Chinner else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && 459430f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) 459530f712c9SDave Chinner bma.logflags &= ~xfs_ilog_fbroot(whichfork); 459630f712c9SDave Chinner /* 459730f712c9SDave Chinner * Log whatever the flags say, even if error. Otherwise we might miss 459830f712c9SDave Chinner * detecting a case where the data is changed, there's an error, 459930f712c9SDave Chinner * and it's not logged so we don't shutdown when we should. 460030f712c9SDave Chinner */ 460130f712c9SDave Chinner if (bma.logflags) 460230f712c9SDave Chinner xfs_trans_log_inode(tp, ip, bma.logflags); 460330f712c9SDave Chinner 460430f712c9SDave Chinner if (bma.cur) { 460530f712c9SDave Chinner if (!error) { 460630f712c9SDave Chinner ASSERT(*firstblock == NULLFSBLOCK || 4607410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, *firstblock) <= 460830f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, 4609410d17f6SChristoph Hellwig bma.cur->bc_private.b.firstblock)); 461030f712c9SDave Chinner *firstblock = bma.cur->bc_private.b.firstblock; 461130f712c9SDave Chinner } 461230f712c9SDave Chinner xfs_btree_del_cursor(bma.cur, 461330f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 461430f712c9SDave Chinner } 461530f712c9SDave Chinner if (!error) 461630f712c9SDave Chinner xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, 461730f712c9SDave Chinner orig_nmap, *nmap); 461830f712c9SDave Chinner return error; 461930f712c9SDave Chinner } 462030f712c9SDave Chinner 46216ebd5a44SChristoph Hellwig static int 46226ebd5a44SChristoph Hellwig xfs_bmapi_remap( 46236ebd5a44SChristoph Hellwig struct xfs_trans *tp, 46246ebd5a44SChristoph Hellwig struct xfs_inode *ip, 46256ebd5a44SChristoph Hellwig xfs_fileoff_t bno, 46266ebd5a44SChristoph Hellwig xfs_filblks_t len, 46276ebd5a44SChristoph Hellwig xfs_fsblock_t startblock, 46286ebd5a44SChristoph Hellwig struct xfs_defer_ops *dfops) 46296ebd5a44SChristoph Hellwig { 46306ebd5a44SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 46316ebd5a44SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); 46326ebd5a44SChristoph Hellwig struct xfs_btree_cur *cur = NULL; 46336ebd5a44SChristoph Hellwig xfs_fsblock_t firstblock = NULLFSBLOCK; 46346ebd5a44SChristoph Hellwig struct xfs_bmbt_irec got; 46356ebd5a44SChristoph Hellwig xfs_extnum_t idx; 46366ebd5a44SChristoph Hellwig int logflags = 0, error; 46376ebd5a44SChristoph Hellwig 46386ebd5a44SChristoph Hellwig ASSERT(len > 0); 46396ebd5a44SChristoph Hellwig ASSERT(len <= (xfs_filblks_t)MAXEXTLEN); 46406ebd5a44SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 46416ebd5a44SChristoph Hellwig 46426ebd5a44SChristoph Hellwig if (unlikely(XFS_TEST_ERROR( 46436ebd5a44SChristoph Hellwig (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS && 46446ebd5a44SChristoph Hellwig XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE), 46459e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 46466ebd5a44SChristoph Hellwig XFS_ERROR_REPORT("xfs_bmapi_remap", XFS_ERRLEVEL_LOW, mp); 46476ebd5a44SChristoph Hellwig return -EFSCORRUPTED; 46486ebd5a44SChristoph Hellwig } 46496ebd5a44SChristoph Hellwig 46506ebd5a44SChristoph Hellwig if (XFS_FORCED_SHUTDOWN(mp)) 46516ebd5a44SChristoph Hellwig return -EIO; 46526ebd5a44SChristoph Hellwig 46536ebd5a44SChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 46546ebd5a44SChristoph Hellwig error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK); 46556ebd5a44SChristoph Hellwig if (error) 46566ebd5a44SChristoph Hellwig return error; 46576ebd5a44SChristoph Hellwig } 46586ebd5a44SChristoph Hellwig 46596ebd5a44SChristoph Hellwig if (xfs_iext_lookup_extent(ip, ifp, bno, &idx, &got)) { 46606ebd5a44SChristoph Hellwig /* make sure we only reflink into a hole. */ 46616ebd5a44SChristoph Hellwig ASSERT(got.br_startoff > bno); 46626ebd5a44SChristoph Hellwig ASSERT(got.br_startoff - bno >= len); 46636ebd5a44SChristoph Hellwig } 46646ebd5a44SChristoph Hellwig 4665bf8eadbaSChristoph Hellwig ip->i_d.di_nblocks += len; 4666bf8eadbaSChristoph Hellwig xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 46676ebd5a44SChristoph Hellwig 46686ebd5a44SChristoph Hellwig if (ifp->if_flags & XFS_IFBROOT) { 46696ebd5a44SChristoph Hellwig cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); 46706ebd5a44SChristoph Hellwig cur->bc_private.b.firstblock = firstblock; 46716ebd5a44SChristoph Hellwig cur->bc_private.b.dfops = dfops; 46726ebd5a44SChristoph Hellwig cur->bc_private.b.flags = 0; 46736ebd5a44SChristoph Hellwig } 46746ebd5a44SChristoph Hellwig 46756ebd5a44SChristoph Hellwig got.br_startoff = bno; 46766ebd5a44SChristoph Hellwig got.br_startblock = startblock; 46776ebd5a44SChristoph Hellwig got.br_blockcount = len; 46786ebd5a44SChristoph Hellwig got.br_state = XFS_EXT_NORM; 46796ebd5a44SChristoph Hellwig 46806ebd5a44SChristoph Hellwig error = xfs_bmap_add_extent_hole_real(tp, ip, XFS_DATA_FORK, &idx, &cur, 46816ebd5a44SChristoph Hellwig &got, &firstblock, dfops, &logflags); 46826ebd5a44SChristoph Hellwig if (error) 46836ebd5a44SChristoph Hellwig goto error0; 46846ebd5a44SChristoph Hellwig 46856ebd5a44SChristoph Hellwig if (xfs_bmap_wants_extents(ip, XFS_DATA_FORK)) { 46866ebd5a44SChristoph Hellwig int tmp_logflags = 0; 46876ebd5a44SChristoph Hellwig 46886ebd5a44SChristoph Hellwig error = xfs_bmap_btree_to_extents(tp, ip, cur, 46896ebd5a44SChristoph Hellwig &tmp_logflags, XFS_DATA_FORK); 46906ebd5a44SChristoph Hellwig logflags |= tmp_logflags; 46916ebd5a44SChristoph Hellwig } 46926ebd5a44SChristoph Hellwig 46936ebd5a44SChristoph Hellwig error0: 46946ebd5a44SChristoph Hellwig if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) 46956ebd5a44SChristoph Hellwig logflags &= ~XFS_ILOG_DEXT; 46966ebd5a44SChristoph Hellwig else if (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) 46976ebd5a44SChristoph Hellwig logflags &= ~XFS_ILOG_DBROOT; 46986ebd5a44SChristoph Hellwig 46996ebd5a44SChristoph Hellwig if (logflags) 47006ebd5a44SChristoph Hellwig xfs_trans_log_inode(tp, ip, logflags); 47016ebd5a44SChristoph Hellwig if (cur) { 47026ebd5a44SChristoph Hellwig xfs_btree_del_cursor(cur, 47036ebd5a44SChristoph Hellwig error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 47046ebd5a44SChristoph Hellwig } 47056ebd5a44SChristoph Hellwig return error; 47066ebd5a44SChristoph Hellwig } 47076ebd5a44SChristoph Hellwig 470830f712c9SDave Chinner /* 4709a9bd24acSBrian Foster * When a delalloc extent is split (e.g., due to a hole punch), the original 4710a9bd24acSBrian Foster * indlen reservation must be shared across the two new extents that are left 4711a9bd24acSBrian Foster * behind. 4712a9bd24acSBrian Foster * 4713a9bd24acSBrian Foster * Given the original reservation and the worst case indlen for the two new 4714a9bd24acSBrian Foster * extents (as calculated by xfs_bmap_worst_indlen()), split the original 4715d34999c9SBrian Foster * reservation fairly across the two new extents. If necessary, steal available 4716d34999c9SBrian Foster * blocks from a deleted extent to make up a reservation deficiency (e.g., if 4717d34999c9SBrian Foster * ores == 1). The number of stolen blocks is returned. The availability and 4718d34999c9SBrian Foster * subsequent accounting of stolen blocks is the responsibility of the caller. 4719a9bd24acSBrian Foster */ 4720d34999c9SBrian Foster static xfs_filblks_t 4721a9bd24acSBrian Foster xfs_bmap_split_indlen( 4722a9bd24acSBrian Foster xfs_filblks_t ores, /* original res. */ 4723a9bd24acSBrian Foster xfs_filblks_t *indlen1, /* ext1 worst indlen */ 4724d34999c9SBrian Foster xfs_filblks_t *indlen2, /* ext2 worst indlen */ 4725d34999c9SBrian Foster xfs_filblks_t avail) /* stealable blocks */ 4726a9bd24acSBrian Foster { 4727a9bd24acSBrian Foster xfs_filblks_t len1 = *indlen1; 4728a9bd24acSBrian Foster xfs_filblks_t len2 = *indlen2; 4729a9bd24acSBrian Foster xfs_filblks_t nres = len1 + len2; /* new total res. */ 4730d34999c9SBrian Foster xfs_filblks_t stolen = 0; 473175d65361SBrian Foster xfs_filblks_t resfactor; 4732a9bd24acSBrian Foster 4733a9bd24acSBrian Foster /* 4734d34999c9SBrian Foster * Steal as many blocks as we can to try and satisfy the worst case 4735d34999c9SBrian Foster * indlen for both new extents. 4736d34999c9SBrian Foster */ 473775d65361SBrian Foster if (ores < nres && avail) 473875d65361SBrian Foster stolen = XFS_FILBLKS_MIN(nres - ores, avail); 473975d65361SBrian Foster ores += stolen; 474075d65361SBrian Foster 474175d65361SBrian Foster /* nothing else to do if we've satisfied the new reservation */ 474275d65361SBrian Foster if (ores >= nres) 474375d65361SBrian Foster return stolen; 4744d34999c9SBrian Foster 4745d34999c9SBrian Foster /* 474675d65361SBrian Foster * We can't meet the total required reservation for the two extents. 474775d65361SBrian Foster * Calculate the percent of the overall shortage between both extents 474875d65361SBrian Foster * and apply this percentage to each of the requested indlen values. 474975d65361SBrian Foster * This distributes the shortage fairly and reduces the chances that one 475075d65361SBrian Foster * of the two extents is left with nothing when extents are repeatedly 475175d65361SBrian Foster * split. 4752a9bd24acSBrian Foster */ 475375d65361SBrian Foster resfactor = (ores * 100); 475475d65361SBrian Foster do_div(resfactor, nres); 475575d65361SBrian Foster len1 *= resfactor; 475675d65361SBrian Foster do_div(len1, 100); 475775d65361SBrian Foster len2 *= resfactor; 475875d65361SBrian Foster do_div(len2, 100); 475975d65361SBrian Foster ASSERT(len1 + len2 <= ores); 476075d65361SBrian Foster ASSERT(len1 < *indlen1 && len2 < *indlen2); 476175d65361SBrian Foster 476275d65361SBrian Foster /* 476375d65361SBrian Foster * Hand out the remainder to each extent. If one of the two reservations 476475d65361SBrian Foster * is zero, we want to make sure that one gets a block first. The loop 476575d65361SBrian Foster * below starts with len1, so hand len2 a block right off the bat if it 476675d65361SBrian Foster * is zero. 476775d65361SBrian Foster */ 476875d65361SBrian Foster ores -= (len1 + len2); 476975d65361SBrian Foster ASSERT((*indlen1 - len1) + (*indlen2 - len2) >= ores); 477075d65361SBrian Foster if (ores && !len2 && *indlen2) { 477175d65361SBrian Foster len2++; 477275d65361SBrian Foster ores--; 4773a9bd24acSBrian Foster } 477475d65361SBrian Foster while (ores) { 477575d65361SBrian Foster if (len1 < *indlen1) { 477675d65361SBrian Foster len1++; 477775d65361SBrian Foster ores--; 477875d65361SBrian Foster } 477975d65361SBrian Foster if (!ores) 4780a9bd24acSBrian Foster break; 478175d65361SBrian Foster if (len2 < *indlen2) { 478275d65361SBrian Foster len2++; 478375d65361SBrian Foster ores--; 4784a9bd24acSBrian Foster } 4785a9bd24acSBrian Foster } 4786a9bd24acSBrian Foster 4787a9bd24acSBrian Foster *indlen1 = len1; 4788a9bd24acSBrian Foster *indlen2 = len2; 4789d34999c9SBrian Foster 4790d34999c9SBrian Foster return stolen; 4791a9bd24acSBrian Foster } 4792a9bd24acSBrian Foster 4793fa5c836cSChristoph Hellwig int 4794fa5c836cSChristoph Hellwig xfs_bmap_del_extent_delay( 4795fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4796fa5c836cSChristoph Hellwig int whichfork, 4797fa5c836cSChristoph Hellwig xfs_extnum_t *idx, 4798fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 4799fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 4800fa5c836cSChristoph Hellwig { 4801fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 4802fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 4803fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 4804fa5c836cSChristoph Hellwig int64_t da_old, da_new, da_diff = 0; 4805fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 4806fa5c836cSChristoph Hellwig xfs_filblks_t got_indlen, new_indlen, stolen; 4807fa5c836cSChristoph Hellwig int error = 0, state = 0; 4808fa5c836cSChristoph Hellwig bool isrt; 4809fa5c836cSChristoph Hellwig 4810fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 4811fa5c836cSChristoph Hellwig 4812fa5c836cSChristoph Hellwig isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 4813fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 4814fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 4815fa5c836cSChristoph Hellwig da_old = startblockval(got->br_startblock); 4816fa5c836cSChristoph Hellwig da_new = 0; 4817fa5c836cSChristoph Hellwig 4818fa5c836cSChristoph Hellwig ASSERT(*idx >= 0); 48195d829300SEric Sandeen ASSERT(*idx <= xfs_iext_count(ifp)); 4820fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 4821fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 4822fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 4823fa5c836cSChristoph Hellwig 4824fa5c836cSChristoph Hellwig if (isrt) { 48254f1adf33SEric Sandeen uint64_t rtexts = XFS_FSB_TO_B(mp, del->br_blockcount); 4826fa5c836cSChristoph Hellwig 4827fa5c836cSChristoph Hellwig do_div(rtexts, mp->m_sb.sb_rextsize); 4828fa5c836cSChristoph Hellwig xfs_mod_frextents(mp, rtexts); 4829fa5c836cSChristoph Hellwig } 4830fa5c836cSChristoph Hellwig 4831fa5c836cSChristoph Hellwig /* 4832fa5c836cSChristoph Hellwig * Update the inode delalloc counter now and wait to update the 4833fa5c836cSChristoph Hellwig * sb counters as we might have to borrow some blocks for the 4834fa5c836cSChristoph Hellwig * indirect block accounting. 4835fa5c836cSChristoph Hellwig */ 48364fd29ec4SDarrick J. Wong error = xfs_trans_reserve_quota_nblks(NULL, ip, 48374fd29ec4SDarrick J. Wong -((long)del->br_blockcount), 0, 4838fa5c836cSChristoph Hellwig isrt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 48394fd29ec4SDarrick J. Wong if (error) 48404fd29ec4SDarrick J. Wong return error; 4841fa5c836cSChristoph Hellwig ip->i_delayed_blks -= del->br_blockcount; 4842fa5c836cSChristoph Hellwig 4843fa5c836cSChristoph Hellwig if (whichfork == XFS_COW_FORK) 4844fa5c836cSChristoph Hellwig state |= BMAP_COWFORK; 4845fa5c836cSChristoph Hellwig 4846fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 48470173c689SChristoph Hellwig state |= BMAP_LEFT_FILLING; 4848fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 48490173c689SChristoph Hellwig state |= BMAP_RIGHT_FILLING; 4850fa5c836cSChristoph Hellwig 48510173c689SChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 48520173c689SChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 4853fa5c836cSChristoph Hellwig /* 4854fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 4855fa5c836cSChristoph Hellwig */ 4856fa5c836cSChristoph Hellwig xfs_iext_remove(ip, *idx, 1, state); 4857fa5c836cSChristoph Hellwig --*idx; 4858fa5c836cSChristoph Hellwig break; 48590173c689SChristoph Hellwig case BMAP_LEFT_FILLING: 4860fa5c836cSChristoph Hellwig /* 4861fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 4862fa5c836cSChristoph Hellwig */ 4863fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4864fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 4865fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4866fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4867fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4868fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 486967e4e69cSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, got); 4870fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4871fa5c836cSChristoph Hellwig break; 48720173c689SChristoph Hellwig case BMAP_RIGHT_FILLING: 4873fa5c836cSChristoph Hellwig /* 4874fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 4875fa5c836cSChristoph Hellwig */ 4876fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4877fa5c836cSChristoph Hellwig got->br_blockcount = got->br_blockcount - del->br_blockcount; 4878fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4879fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4880fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 488167e4e69cSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, got); 4882fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4883fa5c836cSChristoph Hellwig break; 4884fa5c836cSChristoph Hellwig case 0: 4885fa5c836cSChristoph Hellwig /* 4886fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 4887fa5c836cSChristoph Hellwig * 4888fa5c836cSChristoph Hellwig * Distribute the original indlen reservation across the two new 4889fa5c836cSChristoph Hellwig * extents. Steal blocks from the deleted extent if necessary. 4890fa5c836cSChristoph Hellwig * Stealing blocks simply fudges the fdblocks accounting below. 4891fa5c836cSChristoph Hellwig * Warn if either of the new indlen reservations is zero as this 4892fa5c836cSChristoph Hellwig * can lead to delalloc problems. 4893fa5c836cSChristoph Hellwig */ 4894fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4895fa5c836cSChristoph Hellwig 4896fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 4897fa5c836cSChristoph Hellwig got_indlen = xfs_bmap_worst_indlen(ip, got->br_blockcount); 4898fa5c836cSChristoph Hellwig 4899fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 4900fa5c836cSChristoph Hellwig new_indlen = xfs_bmap_worst_indlen(ip, new.br_blockcount); 4901fa5c836cSChristoph Hellwig 4902fa5c836cSChristoph Hellwig WARN_ON_ONCE(!got_indlen || !new_indlen); 4903fa5c836cSChristoph Hellwig stolen = xfs_bmap_split_indlen(da_old, &got_indlen, &new_indlen, 4904fa5c836cSChristoph Hellwig del->br_blockcount); 4905fa5c836cSChristoph Hellwig 4906fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)got_indlen); 490767e4e69cSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, got); 4908fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, 0, _THIS_IP_); 4909fa5c836cSChristoph Hellwig 4910fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 4911fa5c836cSChristoph Hellwig new.br_state = got->br_state; 4912fa5c836cSChristoph Hellwig new.br_startblock = nullstartblock((int)new_indlen); 4913fa5c836cSChristoph Hellwig 4914fa5c836cSChristoph Hellwig ++*idx; 4915fa5c836cSChristoph Hellwig xfs_iext_insert(ip, *idx, 1, &new, state); 4916fa5c836cSChristoph Hellwig 4917fa5c836cSChristoph Hellwig da_new = got_indlen + new_indlen - stolen; 4918fa5c836cSChristoph Hellwig del->br_blockcount -= stolen; 4919fa5c836cSChristoph Hellwig break; 4920fa5c836cSChristoph Hellwig } 4921fa5c836cSChristoph Hellwig 4922fa5c836cSChristoph Hellwig ASSERT(da_old >= da_new); 4923fa5c836cSChristoph Hellwig da_diff = da_old - da_new; 4924fa5c836cSChristoph Hellwig if (!isrt) 4925fa5c836cSChristoph Hellwig da_diff += del->br_blockcount; 4926fa5c836cSChristoph Hellwig if (da_diff) 4927fa5c836cSChristoph Hellwig xfs_mod_fdblocks(mp, da_diff, false); 4928fa5c836cSChristoph Hellwig return error; 4929fa5c836cSChristoph Hellwig } 4930fa5c836cSChristoph Hellwig 4931fa5c836cSChristoph Hellwig void 4932fa5c836cSChristoph Hellwig xfs_bmap_del_extent_cow( 4933fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4934fa5c836cSChristoph Hellwig xfs_extnum_t *idx, 4935fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 4936fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 4937fa5c836cSChristoph Hellwig { 4938fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 4939fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); 4940fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 4941fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 4942fa5c836cSChristoph Hellwig int state = BMAP_COWFORK; 4943fa5c836cSChristoph Hellwig 4944fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 4945fa5c836cSChristoph Hellwig 4946fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 4947fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 4948fa5c836cSChristoph Hellwig 4949fa5c836cSChristoph Hellwig ASSERT(*idx >= 0); 49505d829300SEric Sandeen ASSERT(*idx <= xfs_iext_count(ifp)); 4951fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 4952fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 4953fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 4954fa5c836cSChristoph Hellwig ASSERT(!isnullstartblock(got->br_startblock)); 4955fa5c836cSChristoph Hellwig 4956fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 49570173c689SChristoph Hellwig state |= BMAP_LEFT_FILLING; 4958fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 49590173c689SChristoph Hellwig state |= BMAP_RIGHT_FILLING; 4960fa5c836cSChristoph Hellwig 49610173c689SChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 49620173c689SChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 4963fa5c836cSChristoph Hellwig /* 4964fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 4965fa5c836cSChristoph Hellwig */ 4966fa5c836cSChristoph Hellwig xfs_iext_remove(ip, *idx, 1, state); 4967fa5c836cSChristoph Hellwig --*idx; 4968fa5c836cSChristoph Hellwig break; 49690173c689SChristoph Hellwig case BMAP_LEFT_FILLING: 4970fa5c836cSChristoph Hellwig /* 4971fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 4972fa5c836cSChristoph Hellwig */ 4973fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4974fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 4975fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4976fa5c836cSChristoph Hellwig got->br_startblock = del->br_startblock + del->br_blockcount; 497767e4e69cSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, got); 4978fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4979fa5c836cSChristoph Hellwig break; 49800173c689SChristoph Hellwig case BMAP_RIGHT_FILLING: 4981fa5c836cSChristoph Hellwig /* 4982fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 4983fa5c836cSChristoph Hellwig */ 4984fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4985fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 498667e4e69cSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, got); 4987fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4988fa5c836cSChristoph Hellwig break; 4989fa5c836cSChristoph Hellwig case 0: 4990fa5c836cSChristoph Hellwig /* 4991fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 4992fa5c836cSChristoph Hellwig */ 4993fa5c836cSChristoph Hellwig trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 4994fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 499567e4e69cSChristoph Hellwig xfs_iext_update_extent(ifp, *idx, got); 4996fa5c836cSChristoph Hellwig trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 4997fa5c836cSChristoph Hellwig 4998fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 4999fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 5000fa5c836cSChristoph Hellwig new.br_state = got->br_state; 5001fa5c836cSChristoph Hellwig new.br_startblock = del->br_startblock + del->br_blockcount; 5002fa5c836cSChristoph Hellwig 5003fa5c836cSChristoph Hellwig ++*idx; 5004fa5c836cSChristoph Hellwig xfs_iext_insert(ip, *idx, 1, &new, state); 5005fa5c836cSChristoph Hellwig break; 5006fa5c836cSChristoph Hellwig } 5007fa5c836cSChristoph Hellwig } 5008fa5c836cSChristoph Hellwig 5009a9bd24acSBrian Foster /* 501030f712c9SDave Chinner * Called by xfs_bmapi to update file extent records and the btree 5011e1d7553fSChristoph Hellwig * after removing space. 501230f712c9SDave Chinner */ 501330f712c9SDave Chinner STATIC int /* error */ 5014e1d7553fSChristoph Hellwig xfs_bmap_del_extent_real( 501530f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 501630f712c9SDave Chinner xfs_trans_t *tp, /* current transaction pointer */ 501730f712c9SDave Chinner xfs_extnum_t *idx, /* extent number to update/delete */ 50182c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* list of extents to be freed */ 501930f712c9SDave Chinner xfs_btree_cur_t *cur, /* if null, not a btree */ 502030f712c9SDave Chinner xfs_bmbt_irec_t *del, /* data to remove from extents */ 502130f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 50224847acf8SDarrick J. Wong int whichfork, /* data or attr fork */ 50234847acf8SDarrick J. Wong int bflags) /* bmapi flags */ 502430f712c9SDave Chinner { 502530f712c9SDave Chinner xfs_fsblock_t del_endblock=0; /* first block past del */ 502630f712c9SDave Chinner xfs_fileoff_t del_endoff; /* first offset past del */ 502730f712c9SDave Chinner int do_fx; /* free extent at end of routine */ 502830f712c9SDave Chinner int error; /* error return value */ 50291b24b633SChristoph Hellwig int flags = 0;/* inode logging flags */ 503048fd52b1SChristoph Hellwig struct xfs_bmbt_irec got; /* current extent entry */ 503130f712c9SDave Chinner xfs_fileoff_t got_endoff; /* first offset past got */ 503230f712c9SDave Chinner int i; /* temp state */ 503330f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 503430f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 503530f712c9SDave Chinner xfs_filblks_t nblks; /* quota/sb block count */ 503630f712c9SDave Chinner xfs_bmbt_irec_t new; /* new record to be inserted */ 503730f712c9SDave Chinner /* REFERENCED */ 503830f712c9SDave Chinner uint qfield; /* quota field to update */ 503930f712c9SDave Chinner int state = 0; 504048fd52b1SChristoph Hellwig struct xfs_bmbt_irec old; 504130f712c9SDave Chinner 5042ff6d6af2SBill O'Donnell mp = ip->i_mount; 5043ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_del_exlist); 504430f712c9SDave Chinner 504530f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK) 504630f712c9SDave Chinner state |= BMAP_ATTRFORK; 50473993baebSDarrick J. Wong else if (whichfork == XFS_COW_FORK) 50483993baebSDarrick J. Wong state |= BMAP_COWFORK; 504930f712c9SDave Chinner 505030f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 50515d829300SEric Sandeen ASSERT((*idx >= 0) && (*idx < xfs_iext_count(ifp))); 505230f712c9SDave Chinner ASSERT(del->br_blockcount > 0); 505348fd52b1SChristoph Hellwig xfs_iext_get_extent(ifp, *idx, &got); 505430f712c9SDave Chinner ASSERT(got.br_startoff <= del->br_startoff); 505530f712c9SDave Chinner del_endoff = del->br_startoff + del->br_blockcount; 505630f712c9SDave Chinner got_endoff = got.br_startoff + got.br_blockcount; 505730f712c9SDave Chinner ASSERT(got_endoff >= del_endoff); 5058e1d7553fSChristoph Hellwig ASSERT(!isnullstartblock(got.br_startblock)); 505930f712c9SDave Chinner qfield = 0; 506030f712c9SDave Chinner error = 0; 5061e1d7553fSChristoph Hellwig 50621b24b633SChristoph Hellwig /* 50631b24b633SChristoph Hellwig * If it's the case where the directory code is running with no block 50641b24b633SChristoph Hellwig * reservation, and the deleted block is in the middle of its extent, 50651b24b633SChristoph Hellwig * and the resulting insert of an extent would cause transformation to 50661b24b633SChristoph Hellwig * btree format, then reject it. The calling code will then swap blocks 50671b24b633SChristoph Hellwig * around instead. We have to do this now, rather than waiting for the 50681b24b633SChristoph Hellwig * conversion to btree format, since the transaction will be dirty then. 50691b24b633SChristoph Hellwig */ 50701b24b633SChristoph Hellwig if (tp->t_blk_res == 0 && 50711b24b633SChristoph Hellwig XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && 50721b24b633SChristoph Hellwig XFS_IFORK_NEXTENTS(ip, whichfork) >= 50731b24b633SChristoph Hellwig XFS_IFORK_MAXEXT(ip, whichfork) && 50741b24b633SChristoph Hellwig del->br_startoff > got.br_startoff && del_endoff < got_endoff) 50751b24b633SChristoph Hellwig return -ENOSPC; 50761b24b633SChristoph Hellwig 50771b24b633SChristoph Hellwig flags = XFS_ILOG_CORE; 507830f712c9SDave Chinner if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { 507930f712c9SDave Chinner xfs_fsblock_t bno; 508030f712c9SDave Chinner xfs_filblks_t len; 508130f712c9SDave Chinner 5082e1d7553fSChristoph Hellwig ASSERT(do_mod(del->br_blockcount, mp->m_sb.sb_rextsize) == 0); 5083e1d7553fSChristoph Hellwig ASSERT(do_mod(del->br_startblock, mp->m_sb.sb_rextsize) == 0); 508430f712c9SDave Chinner bno = del->br_startblock; 508530f712c9SDave Chinner len = del->br_blockcount; 508630f712c9SDave Chinner do_div(bno, mp->m_sb.sb_rextsize); 508730f712c9SDave Chinner do_div(len, mp->m_sb.sb_rextsize); 508830f712c9SDave Chinner error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); 508930f712c9SDave Chinner if (error) 509030f712c9SDave Chinner goto done; 509130f712c9SDave Chinner do_fx = 0; 509230f712c9SDave Chinner nblks = len * mp->m_sb.sb_rextsize; 509330f712c9SDave Chinner qfield = XFS_TRANS_DQ_RTBCOUNT; 5094e1d7553fSChristoph Hellwig } else { 509530f712c9SDave Chinner do_fx = 1; 509630f712c9SDave Chinner nblks = del->br_blockcount; 509730f712c9SDave Chinner qfield = XFS_TRANS_DQ_BCOUNT; 509830f712c9SDave Chinner } 5099e1d7553fSChristoph Hellwig 510030f712c9SDave Chinner del_endblock = del->br_startblock + del->br_blockcount; 510130f712c9SDave Chinner if (cur) { 5102e1d7553fSChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, got.br_startoff, 5103e1d7553fSChristoph Hellwig got.br_startblock, got.br_blockcount, &i); 5104e1d7553fSChristoph Hellwig if (error) 510530f712c9SDave Chinner goto done; 5106c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 510730f712c9SDave Chinner } 5108340785ccSDarrick J. Wong 5109491f6f8aSChristoph Hellwig if (got.br_startoff == del->br_startoff) 5110491f6f8aSChristoph Hellwig state |= BMAP_LEFT_FILLING; 5111491f6f8aSChristoph Hellwig if (got_endoff == del_endoff) 5112491f6f8aSChristoph Hellwig state |= BMAP_RIGHT_FILLING; 5113491f6f8aSChristoph Hellwig 5114491f6f8aSChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 5115491f6f8aSChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 511630f712c9SDave Chinner /* 511730f712c9SDave Chinner * Matches the whole extent. Delete the entry. 511830f712c9SDave Chinner */ 51194862cfe8SDarrick J. Wong trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 512030f712c9SDave Chinner xfs_iext_remove(ip, *idx, 1, 512130f712c9SDave Chinner whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); 512230f712c9SDave Chinner --*idx; 512330f712c9SDave Chinner 512430f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 512530f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 512630f712c9SDave Chinner flags |= XFS_ILOG_CORE; 512730f712c9SDave Chinner if (!cur) { 512830f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 512930f712c9SDave Chinner break; 513030f712c9SDave Chinner } 513130f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 513230f712c9SDave Chinner goto done; 5133c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 513430f712c9SDave Chinner break; 5135491f6f8aSChristoph Hellwig case BMAP_LEFT_FILLING: 513630f712c9SDave Chinner /* 513730f712c9SDave Chinner * Deleting the first part of the extent. 513830f712c9SDave Chinner */ 513930f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 514048fd52b1SChristoph Hellwig got.br_startoff = del_endoff; 514148fd52b1SChristoph Hellwig got.br_startblock = del_endblock; 514248fd52b1SChristoph Hellwig got.br_blockcount -= del->br_blockcount; 514348fd52b1SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &got); 514430f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 514530f712c9SDave Chinner if (!cur) { 514630f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 514730f712c9SDave Chinner break; 514830f712c9SDave Chinner } 5149a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 515048fd52b1SChristoph Hellwig if (error) 515130f712c9SDave Chinner goto done; 515230f712c9SDave Chinner break; 5153491f6f8aSChristoph Hellwig case BMAP_RIGHT_FILLING: 515430f712c9SDave Chinner /* 515530f712c9SDave Chinner * Deleting the last part of the extent. 515630f712c9SDave Chinner */ 515730f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 515848fd52b1SChristoph Hellwig got.br_blockcount -= del->br_blockcount; 515948fd52b1SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &got); 516030f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 516130f712c9SDave Chinner if (!cur) { 516230f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 516330f712c9SDave Chinner break; 516430f712c9SDave Chinner } 5165a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 516648fd52b1SChristoph Hellwig if (error) 516730f712c9SDave Chinner goto done; 516830f712c9SDave Chinner break; 516930f712c9SDave Chinner case 0: 517030f712c9SDave Chinner /* 517130f712c9SDave Chinner * Deleting the middle of the extent. 517230f712c9SDave Chinner */ 517330f712c9SDave Chinner trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); 517448fd52b1SChristoph Hellwig 517548fd52b1SChristoph Hellwig old = got; 517648fd52b1SChristoph Hellwig got.br_blockcount = del->br_startoff - got.br_startoff; 517748fd52b1SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &got); 517848fd52b1SChristoph Hellwig 517930f712c9SDave Chinner new.br_startoff = del_endoff; 518048fd52b1SChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 518130f712c9SDave Chinner new.br_state = got.br_state; 518230f712c9SDave Chinner new.br_startblock = del_endblock; 518348fd52b1SChristoph Hellwig 518430f712c9SDave Chinner flags |= XFS_ILOG_CORE; 518530f712c9SDave Chinner if (cur) { 5186a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 5187e1d7553fSChristoph Hellwig if (error) 518830f712c9SDave Chinner goto done; 5189e1d7553fSChristoph Hellwig error = xfs_btree_increment(cur, 0, &i); 5190e1d7553fSChristoph Hellwig if (error) 519130f712c9SDave Chinner goto done; 519230f712c9SDave Chinner cur->bc_rec.b = new; 519330f712c9SDave Chinner error = xfs_btree_insert(cur, &i); 51942451337dSDave Chinner if (error && error != -ENOSPC) 519530f712c9SDave Chinner goto done; 519630f712c9SDave Chinner /* 5197e1d7553fSChristoph Hellwig * If get no-space back from btree insert, it tried a 5198e1d7553fSChristoph Hellwig * split, and we have a zero block reservation. Fix up 5199e1d7553fSChristoph Hellwig * our state and return the error. 520030f712c9SDave Chinner */ 52012451337dSDave Chinner if (error == -ENOSPC) { 520230f712c9SDave Chinner /* 5203e1d7553fSChristoph Hellwig * Reset the cursor, don't trust it after any 5204e1d7553fSChristoph Hellwig * insert operation. 520530f712c9SDave Chinner */ 5206e1d7553fSChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, got.br_startoff, 520748fd52b1SChristoph Hellwig got.br_startblock, 520848fd52b1SChristoph Hellwig got.br_blockcount, &i); 5209e1d7553fSChristoph Hellwig if (error) 521030f712c9SDave Chinner goto done; 5211e1d7553fSChristoph Hellwig XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 521230f712c9SDave Chinner /* 521330f712c9SDave Chinner * Update the btree record back 521430f712c9SDave Chinner * to the original value. 521530f712c9SDave Chinner */ 5216a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &old); 5217e1d7553fSChristoph Hellwig if (error) 521830f712c9SDave Chinner goto done; 521930f712c9SDave Chinner /* 522030f712c9SDave Chinner * Reset the extent record back 522130f712c9SDave Chinner * to the original value. 522230f712c9SDave Chinner */ 522348fd52b1SChristoph Hellwig xfs_iext_update_extent(ifp, *idx, &old); 522430f712c9SDave Chinner flags = 0; 52252451337dSDave Chinner error = -ENOSPC; 522630f712c9SDave Chinner goto done; 522730f712c9SDave Chinner } 5228c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 522930f712c9SDave Chinner } else 523030f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 523130f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 523230f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 523330f712c9SDave Chinner trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); 523430f712c9SDave Chinner xfs_iext_insert(ip, *idx + 1, 1, &new, state); 523530f712c9SDave Chinner ++*idx; 523630f712c9SDave Chinner break; 523730f712c9SDave Chinner } 52389c194644SDarrick J. Wong 52399c194644SDarrick J. Wong /* remove reverse mapping */ 52409c194644SDarrick J. Wong error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, del); 52419c194644SDarrick J. Wong if (error) 52429c194644SDarrick J. Wong goto done; 52439c194644SDarrick J. Wong 524430f712c9SDave Chinner /* 524530f712c9SDave Chinner * If we need to, add to list of extents to delete. 524630f712c9SDave Chinner */ 52474847acf8SDarrick J. Wong if (do_fx && !(bflags & XFS_BMAPI_REMAP)) { 524862aab20fSDarrick J. Wong if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) { 524962aab20fSDarrick J. Wong error = xfs_refcount_decrease_extent(mp, dfops, del); 525062aab20fSDarrick J. Wong if (error) 525162aab20fSDarrick J. Wong goto done; 525262aab20fSDarrick J. Wong } else 52532c3234d1SDarrick J. Wong xfs_bmap_add_free(mp, dfops, del->br_startblock, 5254340785ccSDarrick J. Wong del->br_blockcount, NULL); 525562aab20fSDarrick J. Wong } 525662aab20fSDarrick J. Wong 525730f712c9SDave Chinner /* 525830f712c9SDave Chinner * Adjust inode # blocks in the file. 525930f712c9SDave Chinner */ 526030f712c9SDave Chinner if (nblks) 526130f712c9SDave Chinner ip->i_d.di_nblocks -= nblks; 526230f712c9SDave Chinner /* 526330f712c9SDave Chinner * Adjust quota data. 526430f712c9SDave Chinner */ 52654847acf8SDarrick J. Wong if (qfield && !(bflags & XFS_BMAPI_REMAP)) 526630f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); 526730f712c9SDave Chinner 526830f712c9SDave Chinner done: 526930f712c9SDave Chinner *logflagsp = flags; 527030f712c9SDave Chinner return error; 527130f712c9SDave Chinner } 527230f712c9SDave Chinner 527330f712c9SDave Chinner /* 527430f712c9SDave Chinner * Unmap (remove) blocks from a file. 527530f712c9SDave Chinner * If nexts is nonzero then the number of extents to remove is limited to 527630f712c9SDave Chinner * that value. If not all extents in the block range can be removed then 527730f712c9SDave Chinner * *done is set. 527830f712c9SDave Chinner */ 527930f712c9SDave Chinner int /* error */ 52804453593bSDarrick J. Wong __xfs_bunmapi( 528130f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 528230f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 52838280f6edSChristoph Hellwig xfs_fileoff_t start, /* first file offset deleted */ 52844453593bSDarrick J. Wong xfs_filblks_t *rlen, /* i/o: amount remaining */ 528530f712c9SDave Chinner int flags, /* misc flags */ 528630f712c9SDave Chinner xfs_extnum_t nexts, /* number of extents max */ 528730f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first allocated block 528830f712c9SDave Chinner controls a.g. for allocs */ 52894453593bSDarrick J. Wong struct xfs_defer_ops *dfops) /* i/o: deferred updates */ 529030f712c9SDave Chinner { 529130f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 529230f712c9SDave Chinner xfs_bmbt_irec_t del; /* extent being deleted */ 529330f712c9SDave Chinner int error; /* error return value */ 529430f712c9SDave Chinner xfs_extnum_t extno; /* extent number in list */ 529530f712c9SDave Chinner xfs_bmbt_irec_t got; /* current extent record */ 529630f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 529730f712c9SDave Chinner int isrt; /* freeing in rt area */ 529830f712c9SDave Chinner xfs_extnum_t lastx; /* last extent index used */ 529930f712c9SDave Chinner int logflags; /* transaction logging flags */ 530030f712c9SDave Chinner xfs_extlen_t mod; /* rt extent offset */ 530130f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 530230f712c9SDave Chinner int tmp_logflags; /* partial logging flags */ 530330f712c9SDave Chinner int wasdel; /* was a delayed alloc extent */ 530430f712c9SDave Chinner int whichfork; /* data or attribute fork */ 530530f712c9SDave Chinner xfs_fsblock_t sum; 53064453593bSDarrick J. Wong xfs_filblks_t len = *rlen; /* length to unmap in file */ 5307e1a4e37cSDarrick J. Wong xfs_fileoff_t max_len; 53085b094d6dSChristoph Hellwig xfs_agnumber_t prev_agno = NULLAGNUMBER, agno; 53098280f6edSChristoph Hellwig xfs_fileoff_t end; 531030f712c9SDave Chinner 53118280f6edSChristoph Hellwig trace_xfs_bunmap(ip, start, len, flags, _RET_IP_); 531230f712c9SDave Chinner 53133993baebSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 53143993baebSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 531530f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 531630f712c9SDave Chinner if (unlikely( 531730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 531830f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { 531930f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, 532030f712c9SDave Chinner ip->i_mount); 53212451337dSDave Chinner return -EFSCORRUPTED; 532230f712c9SDave Chinner } 532330f712c9SDave Chinner mp = ip->i_mount; 532430f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 53252451337dSDave Chinner return -EIO; 532630f712c9SDave Chinner 532730f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 532830f712c9SDave Chinner ASSERT(len > 0); 532930f712c9SDave Chinner ASSERT(nexts >= 0); 533030f712c9SDave Chinner 5331e1a4e37cSDarrick J. Wong /* 5332e1a4e37cSDarrick J. Wong * Guesstimate how many blocks we can unmap without running the risk of 5333e1a4e37cSDarrick J. Wong * blowing out the transaction with a mix of EFIs and reflink 5334e1a4e37cSDarrick J. Wong * adjustments. 5335e1a4e37cSDarrick J. Wong */ 5336e1a4e37cSDarrick J. Wong if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) 5337e1a4e37cSDarrick J. Wong max_len = min(len, xfs_refcount_max_unmap(tp->t_log_res)); 5338e1a4e37cSDarrick J. Wong else 5339e1a4e37cSDarrick J. Wong max_len = len; 5340e1a4e37cSDarrick J. Wong 534130f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS) && 534230f712c9SDave Chinner (error = xfs_iread_extents(tp, ip, whichfork))) 534330f712c9SDave Chinner return error; 53445d829300SEric Sandeen if (xfs_iext_count(ifp) == 0) { 53454453593bSDarrick J. Wong *rlen = 0; 534630f712c9SDave Chinner return 0; 534730f712c9SDave Chinner } 5348ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_unmap); 534930f712c9SDave Chinner isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 53508280f6edSChristoph Hellwig end = start + len - 1; 535130f712c9SDave Chinner 535230f712c9SDave Chinner /* 535330f712c9SDave Chinner * Check to see if the given block number is past the end of the 535430f712c9SDave Chinner * file, back up to the last block if so... 535530f712c9SDave Chinner */ 53568280f6edSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, end, &lastx, &got)) { 53577efc7945SChristoph Hellwig ASSERT(lastx > 0); 53587efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, --lastx, &got); 53598280f6edSChristoph Hellwig end = got.br_startoff + got.br_blockcount - 1; 536030f712c9SDave Chinner } 53617efc7945SChristoph Hellwig 536230f712c9SDave Chinner logflags = 0; 536330f712c9SDave Chinner if (ifp->if_flags & XFS_IFBROOT) { 536430f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); 536530f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 536630f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 53672c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 536830f712c9SDave Chinner cur->bc_private.b.flags = 0; 536930f712c9SDave Chinner } else 537030f712c9SDave Chinner cur = NULL; 537130f712c9SDave Chinner 537230f712c9SDave Chinner if (isrt) { 537330f712c9SDave Chinner /* 537430f712c9SDave Chinner * Synchronize by locking the bitmap inode. 537530f712c9SDave Chinner */ 5376f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); 537730f712c9SDave Chinner xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); 5378f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); 5379f4a0660dSDarrick J. Wong xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); 538030f712c9SDave Chinner } 538130f712c9SDave Chinner 538230f712c9SDave Chinner extno = 0; 53838280f6edSChristoph Hellwig while (end != (xfs_fileoff_t)-1 && end >= start && lastx >= 0 && 5384e1a4e37cSDarrick J. Wong (nexts == 0 || extno < nexts) && max_len > 0) { 538530f712c9SDave Chinner /* 53868280f6edSChristoph Hellwig * Is the found extent after a hole in which end lives? 538730f712c9SDave Chinner * Just back up to the previous extent, if so. 538830f712c9SDave Chinner */ 53898280f6edSChristoph Hellwig if (got.br_startoff > end) { 539030f712c9SDave Chinner if (--lastx < 0) 539130f712c9SDave Chinner break; 53927efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 539330f712c9SDave Chinner } 539430f712c9SDave Chinner /* 539530f712c9SDave Chinner * Is the last block of this extent before the range 539630f712c9SDave Chinner * we're supposed to delete? If so, we're done. 539730f712c9SDave Chinner */ 53988280f6edSChristoph Hellwig end = XFS_FILEOFF_MIN(end, 539930f712c9SDave Chinner got.br_startoff + got.br_blockcount - 1); 54008280f6edSChristoph Hellwig if (end < start) 540130f712c9SDave Chinner break; 540230f712c9SDave Chinner /* 540330f712c9SDave Chinner * Then deal with the (possibly delayed) allocated space 540430f712c9SDave Chinner * we found. 540530f712c9SDave Chinner */ 540630f712c9SDave Chinner del = got; 540730f712c9SDave Chinner wasdel = isnullstartblock(del.br_startblock); 54085b094d6dSChristoph Hellwig 54095b094d6dSChristoph Hellwig /* 54105b094d6dSChristoph Hellwig * Make sure we don't touch multiple AGF headers out of order 54115b094d6dSChristoph Hellwig * in a single transaction, as that could cause AB-BA deadlocks. 54125b094d6dSChristoph Hellwig */ 54135b094d6dSChristoph Hellwig if (!wasdel) { 54145b094d6dSChristoph Hellwig agno = XFS_FSB_TO_AGNO(mp, del.br_startblock); 54155b094d6dSChristoph Hellwig if (prev_agno != NULLAGNUMBER && prev_agno > agno) 54165b094d6dSChristoph Hellwig break; 54175b094d6dSChristoph Hellwig prev_agno = agno; 54185b094d6dSChristoph Hellwig } 541930f712c9SDave Chinner if (got.br_startoff < start) { 542030f712c9SDave Chinner del.br_startoff = start; 542130f712c9SDave Chinner del.br_blockcount -= start - got.br_startoff; 542230f712c9SDave Chinner if (!wasdel) 542330f712c9SDave Chinner del.br_startblock += start - got.br_startoff; 542430f712c9SDave Chinner } 54258280f6edSChristoph Hellwig if (del.br_startoff + del.br_blockcount > end + 1) 54268280f6edSChristoph Hellwig del.br_blockcount = end + 1 - del.br_startoff; 5427e1a4e37cSDarrick J. Wong 5428e1a4e37cSDarrick J. Wong /* How much can we safely unmap? */ 5429e1a4e37cSDarrick J. Wong if (max_len < del.br_blockcount) { 5430e1a4e37cSDarrick J. Wong del.br_startoff += del.br_blockcount - max_len; 5431e1a4e37cSDarrick J. Wong if (!wasdel) 5432e1a4e37cSDarrick J. Wong del.br_startblock += del.br_blockcount - max_len; 5433e1a4e37cSDarrick J. Wong del.br_blockcount = max_len; 5434e1a4e37cSDarrick J. Wong } 5435e1a4e37cSDarrick J. Wong 543630f712c9SDave Chinner sum = del.br_startblock + del.br_blockcount; 543730f712c9SDave Chinner if (isrt && 543830f712c9SDave Chinner (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { 543930f712c9SDave Chinner /* 544030f712c9SDave Chinner * Realtime extent not lined up at the end. 544130f712c9SDave Chinner * The extent could have been split into written 544230f712c9SDave Chinner * and unwritten pieces, or we could just be 544330f712c9SDave Chinner * unmapping part of it. But we can't really 544430f712c9SDave Chinner * get rid of part of a realtime extent. 544530f712c9SDave Chinner */ 544630f712c9SDave Chinner if (del.br_state == XFS_EXT_UNWRITTEN || 544730f712c9SDave Chinner !xfs_sb_version_hasextflgbit(&mp->m_sb)) { 544830f712c9SDave Chinner /* 544930f712c9SDave Chinner * This piece is unwritten, or we're not 545030f712c9SDave Chinner * using unwritten extents. Skip over it. 545130f712c9SDave Chinner */ 54528280f6edSChristoph Hellwig ASSERT(end >= mod); 54538280f6edSChristoph Hellwig end -= mod > del.br_blockcount ? 545430f712c9SDave Chinner del.br_blockcount : mod; 54558280f6edSChristoph Hellwig if (end < got.br_startoff) { 545630f712c9SDave Chinner if (--lastx >= 0) 5457e3f0f756SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, 5458e3f0f756SChristoph Hellwig &got); 545930f712c9SDave Chinner } 546030f712c9SDave Chinner continue; 546130f712c9SDave Chinner } 546230f712c9SDave Chinner /* 546330f712c9SDave Chinner * It's written, turn it unwritten. 546430f712c9SDave Chinner * This is better than zeroing it. 546530f712c9SDave Chinner */ 546630f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 5467a7e5d03bSChristoph Hellwig ASSERT(tp->t_blk_res > 0); 546830f712c9SDave Chinner /* 546930f712c9SDave Chinner * If this spans a realtime extent boundary, 547030f712c9SDave Chinner * chop it back to the start of the one we end at. 547130f712c9SDave Chinner */ 547230f712c9SDave Chinner if (del.br_blockcount > mod) { 547330f712c9SDave Chinner del.br_startoff += del.br_blockcount - mod; 547430f712c9SDave Chinner del.br_startblock += del.br_blockcount - mod; 547530f712c9SDave Chinner del.br_blockcount = mod; 547630f712c9SDave Chinner } 547730f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 547830f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, ip, 547905a630d7SDarrick J. Wong whichfork, &lastx, &cur, &del, 548005a630d7SDarrick J. Wong firstblock, dfops, &logflags); 548130f712c9SDave Chinner if (error) 548230f712c9SDave Chinner goto error0; 548330f712c9SDave Chinner goto nodelete; 548430f712c9SDave Chinner } 548530f712c9SDave Chinner if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { 548630f712c9SDave Chinner /* 548730f712c9SDave Chinner * Realtime extent is lined up at the end but not 548830f712c9SDave Chinner * at the front. We'll get rid of full extents if 548930f712c9SDave Chinner * we can. 549030f712c9SDave Chinner */ 549130f712c9SDave Chinner mod = mp->m_sb.sb_rextsize - mod; 549230f712c9SDave Chinner if (del.br_blockcount > mod) { 549330f712c9SDave Chinner del.br_blockcount -= mod; 549430f712c9SDave Chinner del.br_startoff += mod; 549530f712c9SDave Chinner del.br_startblock += mod; 549630f712c9SDave Chinner } else if ((del.br_startoff == start && 549730f712c9SDave Chinner (del.br_state == XFS_EXT_UNWRITTEN || 5498a7e5d03bSChristoph Hellwig tp->t_blk_res == 0)) || 549930f712c9SDave Chinner !xfs_sb_version_hasextflgbit(&mp->m_sb)) { 550030f712c9SDave Chinner /* 550130f712c9SDave Chinner * Can't make it unwritten. There isn't 550230f712c9SDave Chinner * a full extent here so just skip it. 550330f712c9SDave Chinner */ 55048280f6edSChristoph Hellwig ASSERT(end >= del.br_blockcount); 55058280f6edSChristoph Hellwig end -= del.br_blockcount; 55068280f6edSChristoph Hellwig if (got.br_startoff > end && --lastx >= 0) 55077efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 550830f712c9SDave Chinner continue; 550930f712c9SDave Chinner } else if (del.br_state == XFS_EXT_UNWRITTEN) { 55107efc7945SChristoph Hellwig struct xfs_bmbt_irec prev; 55117efc7945SChristoph Hellwig 551230f712c9SDave Chinner /* 551330f712c9SDave Chinner * This one is already unwritten. 551430f712c9SDave Chinner * It must have a written left neighbor. 551530f712c9SDave Chinner * Unwrite the killed part of that one and 551630f712c9SDave Chinner * try again. 551730f712c9SDave Chinner */ 551830f712c9SDave Chinner ASSERT(lastx > 0); 55197efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx - 1, &prev); 552030f712c9SDave Chinner ASSERT(prev.br_state == XFS_EXT_NORM); 552130f712c9SDave Chinner ASSERT(!isnullstartblock(prev.br_startblock)); 552230f712c9SDave Chinner ASSERT(del.br_startblock == 552330f712c9SDave Chinner prev.br_startblock + prev.br_blockcount); 552430f712c9SDave Chinner if (prev.br_startoff < start) { 552530f712c9SDave Chinner mod = start - prev.br_startoff; 552630f712c9SDave Chinner prev.br_blockcount -= mod; 552730f712c9SDave Chinner prev.br_startblock += mod; 552830f712c9SDave Chinner prev.br_startoff = start; 552930f712c9SDave Chinner } 553030f712c9SDave Chinner prev.br_state = XFS_EXT_UNWRITTEN; 553130f712c9SDave Chinner lastx--; 553230f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 553305a630d7SDarrick J. Wong ip, whichfork, &lastx, &cur, 553405a630d7SDarrick J. Wong &prev, firstblock, dfops, 553505a630d7SDarrick J. Wong &logflags); 553630f712c9SDave Chinner if (error) 553730f712c9SDave Chinner goto error0; 553830f712c9SDave Chinner goto nodelete; 553930f712c9SDave Chinner } else { 554030f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 554130f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 554230f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 554305a630d7SDarrick J. Wong ip, whichfork, &lastx, &cur, 554405a630d7SDarrick J. Wong &del, firstblock, dfops, 554505a630d7SDarrick J. Wong &logflags); 554630f712c9SDave Chinner if (error) 554730f712c9SDave Chinner goto error0; 554830f712c9SDave Chinner goto nodelete; 554930f712c9SDave Chinner } 555030f712c9SDave Chinner } 555130f712c9SDave Chinner 5552e1d7553fSChristoph Hellwig if (wasdel) { 5553e1d7553fSChristoph Hellwig error = xfs_bmap_del_extent_delay(ip, whichfork, &lastx, 5554e1d7553fSChristoph Hellwig &got, &del); 5555e1d7553fSChristoph Hellwig } else { 5556e1d7553fSChristoph Hellwig error = xfs_bmap_del_extent_real(ip, tp, &lastx, dfops, 5557e1d7553fSChristoph Hellwig cur, &del, &tmp_logflags, whichfork, 5558e1d7553fSChristoph Hellwig flags); 555930f712c9SDave Chinner logflags |= tmp_logflags; 5560e1d7553fSChristoph Hellwig } 5561e1d7553fSChristoph Hellwig 556230f712c9SDave Chinner if (error) 556330f712c9SDave Chinner goto error0; 5564b2706a05SBrian Foster 5565e1a4e37cSDarrick J. Wong max_len -= del.br_blockcount; 55668280f6edSChristoph Hellwig end = del.br_startoff - 1; 556730f712c9SDave Chinner nodelete: 556830f712c9SDave Chinner /* 556930f712c9SDave Chinner * If not done go on to the next (previous) record. 557030f712c9SDave Chinner */ 55718280f6edSChristoph Hellwig if (end != (xfs_fileoff_t)-1 && end >= start) { 557230f712c9SDave Chinner if (lastx >= 0) { 55737efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 55748280f6edSChristoph Hellwig if (got.br_startoff > end && --lastx >= 0) 55757efc7945SChristoph Hellwig xfs_iext_get_extent(ifp, lastx, &got); 557630f712c9SDave Chinner } 557730f712c9SDave Chinner extno++; 557830f712c9SDave Chinner } 557930f712c9SDave Chinner } 55808280f6edSChristoph Hellwig if (end == (xfs_fileoff_t)-1 || end < start || lastx < 0) 55814453593bSDarrick J. Wong *rlen = 0; 55824453593bSDarrick J. Wong else 55838280f6edSChristoph Hellwig *rlen = end - start + 1; 558430f712c9SDave Chinner 558530f712c9SDave Chinner /* 558630f712c9SDave Chinner * Convert to a btree if necessary. 558730f712c9SDave Chinner */ 558830f712c9SDave Chinner if (xfs_bmap_needs_btree(ip, whichfork)) { 558930f712c9SDave Chinner ASSERT(cur == NULL); 55902c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, 559130f712c9SDave Chinner &cur, 0, &tmp_logflags, whichfork); 559230f712c9SDave Chinner logflags |= tmp_logflags; 559330f712c9SDave Chinner if (error) 559430f712c9SDave Chinner goto error0; 559530f712c9SDave Chinner } 559630f712c9SDave Chinner /* 559730f712c9SDave Chinner * transform from btree to extents, give it cur 559830f712c9SDave Chinner */ 559930f712c9SDave Chinner else if (xfs_bmap_wants_extents(ip, whichfork)) { 560030f712c9SDave Chinner ASSERT(cur != NULL); 560130f712c9SDave Chinner error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, 560230f712c9SDave Chinner whichfork); 560330f712c9SDave Chinner logflags |= tmp_logflags; 560430f712c9SDave Chinner if (error) 560530f712c9SDave Chinner goto error0; 560630f712c9SDave Chinner } 560730f712c9SDave Chinner /* 560830f712c9SDave Chinner * transform from extents to local? 560930f712c9SDave Chinner */ 561030f712c9SDave Chinner error = 0; 561130f712c9SDave Chinner error0: 561230f712c9SDave Chinner /* 561330f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 561430f712c9SDave Chinner * logging the extent records if we've converted to btree format. 561530f712c9SDave Chinner */ 561630f712c9SDave Chinner if ((logflags & xfs_ilog_fext(whichfork)) && 561730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 561830f712c9SDave Chinner logflags &= ~xfs_ilog_fext(whichfork); 561930f712c9SDave Chinner else if ((logflags & xfs_ilog_fbroot(whichfork)) && 562030f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) 562130f712c9SDave Chinner logflags &= ~xfs_ilog_fbroot(whichfork); 562230f712c9SDave Chinner /* 562330f712c9SDave Chinner * Log inode even in the error case, if the transaction 562430f712c9SDave Chinner * is dirty we'll need to shut down the filesystem. 562530f712c9SDave Chinner */ 562630f712c9SDave Chinner if (logflags) 562730f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 562830f712c9SDave Chinner if (cur) { 562930f712c9SDave Chinner if (!error) { 563030f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock; 563130f712c9SDave Chinner cur->bc_private.b.allocated = 0; 563230f712c9SDave Chinner } 563330f712c9SDave Chinner xfs_btree_del_cursor(cur, 563430f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 563530f712c9SDave Chinner } 563630f712c9SDave Chinner return error; 563730f712c9SDave Chinner } 563830f712c9SDave Chinner 56394453593bSDarrick J. Wong /* Unmap a range of a file. */ 56404453593bSDarrick J. Wong int 56414453593bSDarrick J. Wong xfs_bunmapi( 56424453593bSDarrick J. Wong xfs_trans_t *tp, 56434453593bSDarrick J. Wong struct xfs_inode *ip, 56444453593bSDarrick J. Wong xfs_fileoff_t bno, 56454453593bSDarrick J. Wong xfs_filblks_t len, 56464453593bSDarrick J. Wong int flags, 56474453593bSDarrick J. Wong xfs_extnum_t nexts, 56484453593bSDarrick J. Wong xfs_fsblock_t *firstblock, 56494453593bSDarrick J. Wong struct xfs_defer_ops *dfops, 56504453593bSDarrick J. Wong int *done) 56514453593bSDarrick J. Wong { 56524453593bSDarrick J. Wong int error; 56534453593bSDarrick J. Wong 56544453593bSDarrick J. Wong error = __xfs_bunmapi(tp, ip, bno, &len, flags, nexts, firstblock, 56554453593bSDarrick J. Wong dfops); 56564453593bSDarrick J. Wong *done = (len == 0); 56574453593bSDarrick J. Wong return error; 56584453593bSDarrick J. Wong } 56594453593bSDarrick J. Wong 566030f712c9SDave Chinner /* 5661ddb19e31SBrian Foster * Determine whether an extent shift can be accomplished by a merge with the 5662ddb19e31SBrian Foster * extent that precedes the target hole of the shift. 5663ddb19e31SBrian Foster */ 5664ddb19e31SBrian Foster STATIC bool 5665ddb19e31SBrian Foster xfs_bmse_can_merge( 5666ddb19e31SBrian Foster struct xfs_bmbt_irec *left, /* preceding extent */ 5667ddb19e31SBrian Foster struct xfs_bmbt_irec *got, /* current extent to shift */ 5668ddb19e31SBrian Foster xfs_fileoff_t shift) /* shift fsb */ 5669ddb19e31SBrian Foster { 5670ddb19e31SBrian Foster xfs_fileoff_t startoff; 5671ddb19e31SBrian Foster 5672ddb19e31SBrian Foster startoff = got->br_startoff - shift; 5673ddb19e31SBrian Foster 5674ddb19e31SBrian Foster /* 5675ddb19e31SBrian Foster * The extent, once shifted, must be adjacent in-file and on-disk with 5676ddb19e31SBrian Foster * the preceding extent. 5677ddb19e31SBrian Foster */ 5678ddb19e31SBrian Foster if ((left->br_startoff + left->br_blockcount != startoff) || 5679ddb19e31SBrian Foster (left->br_startblock + left->br_blockcount != got->br_startblock) || 5680ddb19e31SBrian Foster (left->br_state != got->br_state) || 5681ddb19e31SBrian Foster (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) 5682ddb19e31SBrian Foster return false; 5683ddb19e31SBrian Foster 5684ddb19e31SBrian Foster return true; 5685ddb19e31SBrian Foster } 5686ddb19e31SBrian Foster 5687ddb19e31SBrian Foster /* 5688ddb19e31SBrian Foster * A bmap extent shift adjusts the file offset of an extent to fill a preceding 5689ddb19e31SBrian Foster * hole in the file. If an extent shift would result in the extent being fully 5690ddb19e31SBrian Foster * adjacent to the extent that currently precedes the hole, we can merge with 5691ddb19e31SBrian Foster * the preceding extent rather than do the shift. 5692ddb19e31SBrian Foster * 5693ddb19e31SBrian Foster * This function assumes the caller has verified a shift-by-merge is possible 5694ddb19e31SBrian Foster * with the provided extents via xfs_bmse_can_merge(). 5695ddb19e31SBrian Foster */ 5696ddb19e31SBrian Foster STATIC int 5697ddb19e31SBrian Foster xfs_bmse_merge( 5698ddb19e31SBrian Foster struct xfs_inode *ip, 5699ddb19e31SBrian Foster int whichfork, 5700ddb19e31SBrian Foster xfs_fileoff_t shift, /* shift fsb */ 5701ddb19e31SBrian Foster int current_ext, /* idx of gotp */ 57024da6b514SChristoph Hellwig struct xfs_bmbt_irec *got, /* extent to shift */ 57034da6b514SChristoph Hellwig struct xfs_bmbt_irec *left, /* preceding extent */ 5704ddb19e31SBrian Foster struct xfs_btree_cur *cur, 57054da6b514SChristoph Hellwig int *logflags, /* output */ 57064da6b514SChristoph Hellwig struct xfs_defer_ops *dfops) 5707ddb19e31SBrian Foster { 57084da6b514SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 57094da6b514SChristoph Hellwig struct xfs_bmbt_irec new; 5710ddb19e31SBrian Foster xfs_filblks_t blockcount; 5711ddb19e31SBrian Foster int error, i; 57125fb5aeeeSEric Sandeen struct xfs_mount *mp = ip->i_mount; 5713ddb19e31SBrian Foster 57144da6b514SChristoph Hellwig blockcount = left->br_blockcount + got->br_blockcount; 5715ddb19e31SBrian Foster 5716ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 5717ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 57184da6b514SChristoph Hellwig ASSERT(xfs_bmse_can_merge(left, got, shift)); 5719ddb19e31SBrian Foster 57204da6b514SChristoph Hellwig new = *left; 57214da6b514SChristoph Hellwig new.br_blockcount = blockcount; 5722ddb19e31SBrian Foster 5723ddb19e31SBrian Foster /* 5724ddb19e31SBrian Foster * Update the on-disk extent count, the btree if necessary and log the 5725ddb19e31SBrian Foster * inode. 5726ddb19e31SBrian Foster */ 5727ddb19e31SBrian Foster XFS_IFORK_NEXT_SET(ip, whichfork, 5728ddb19e31SBrian Foster XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 5729ddb19e31SBrian Foster *logflags |= XFS_ILOG_CORE; 5730ddb19e31SBrian Foster if (!cur) { 5731ddb19e31SBrian Foster *logflags |= XFS_ILOG_DEXT; 57324da6b514SChristoph Hellwig goto done; 5733ddb19e31SBrian Foster } 5734ddb19e31SBrian Foster 5735ddb19e31SBrian Foster /* lookup and remove the extent to merge */ 57364da6b514SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, got->br_startoff, got->br_startblock, 57374da6b514SChristoph Hellwig got->br_blockcount, &i); 5738ddb19e31SBrian Foster if (error) 57394db431f5SDave Chinner return error; 57405fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5741ddb19e31SBrian Foster 5742ddb19e31SBrian Foster error = xfs_btree_delete(cur, &i); 5743ddb19e31SBrian Foster if (error) 57444db431f5SDave Chinner return error; 57455fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5746ddb19e31SBrian Foster 5747ddb19e31SBrian Foster /* lookup and update size of the previous extent */ 57484da6b514SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, left->br_startoff, left->br_startblock, 57494da6b514SChristoph Hellwig left->br_blockcount, &i); 5750ddb19e31SBrian Foster if (error) 57514db431f5SDave Chinner return error; 57525fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5753ddb19e31SBrian Foster 5754a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &new); 57554da6b514SChristoph Hellwig if (error) 57564da6b514SChristoph Hellwig return error; 5757ddb19e31SBrian Foster 57584da6b514SChristoph Hellwig done: 57594da6b514SChristoph Hellwig xfs_iext_update_extent(ifp, current_ext - 1, &new); 57604da6b514SChristoph Hellwig xfs_iext_remove(ip, current_ext, 1, 0); 57614da6b514SChristoph Hellwig 57624cc1ee5eSDarrick J. Wong /* update reverse mapping. rmap functions merge the rmaps for us */ 57634da6b514SChristoph Hellwig error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, got); 57644da6b514SChristoph Hellwig if (error) 57654da6b514SChristoph Hellwig return error; 57664cc1ee5eSDarrick J. Wong memcpy(&new, got, sizeof(new)); 57674cc1ee5eSDarrick J. Wong new.br_startoff = left->br_startoff + left->br_blockcount; 57684da6b514SChristoph Hellwig return xfs_rmap_map_extent(mp, dfops, ip, whichfork, &new); 5769ddb19e31SBrian Foster } 5770ddb19e31SBrian Foster 5771ddb19e31SBrian Foster /* 5772a979bdfeSBrian Foster * Shift a single extent. 5773a979bdfeSBrian Foster */ 5774a979bdfeSBrian Foster STATIC int 5775a979bdfeSBrian Foster xfs_bmse_shift_one( 5776a979bdfeSBrian Foster struct xfs_inode *ip, 5777a979bdfeSBrian Foster int whichfork, 5778a979bdfeSBrian Foster xfs_fileoff_t offset_shift_fsb, 5779a979bdfeSBrian Foster int *current_ext, 57804da6b514SChristoph Hellwig struct xfs_bmbt_irec *got, 5781a979bdfeSBrian Foster struct xfs_btree_cur *cur, 5782a904b1caSNamjae Jeon int *logflags, 57839c194644SDarrick J. Wong enum shift_direction direction, 57849c194644SDarrick J. Wong struct xfs_defer_ops *dfops) 5785a979bdfeSBrian Foster { 5786a979bdfeSBrian Foster struct xfs_ifork *ifp; 57875fb5aeeeSEric Sandeen struct xfs_mount *mp; 5788a979bdfeSBrian Foster xfs_fileoff_t startoff; 57894da6b514SChristoph Hellwig struct xfs_bmbt_irec adj_irec, new; 5790a979bdfeSBrian Foster int error; 5791a979bdfeSBrian Foster int i; 5792a904b1caSNamjae Jeon int total_extents; 5793a979bdfeSBrian Foster 57945fb5aeeeSEric Sandeen mp = ip->i_mount; 5795a979bdfeSBrian Foster ifp = XFS_IFORK_PTR(ip, whichfork); 57965d829300SEric Sandeen total_extents = xfs_iext_count(ifp); 5797a979bdfeSBrian Foster 5798f71721d0SBrian Foster /* delalloc extents should be prevented by caller */ 57994da6b514SChristoph Hellwig XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got->br_startblock)); 5800f71721d0SBrian Foster 5801a904b1caSNamjae Jeon if (direction == SHIFT_LEFT) { 58024da6b514SChristoph Hellwig startoff = got->br_startoff - offset_shift_fsb; 5803a979bdfeSBrian Foster 5804a904b1caSNamjae Jeon /* 5805a904b1caSNamjae Jeon * Check for merge if we've got an extent to the left, 5806a904b1caSNamjae Jeon * otherwise make sure there's enough room at the start 5807a904b1caSNamjae Jeon * of the file for the shift. 5808a904b1caSNamjae Jeon */ 5809a904b1caSNamjae Jeon if (!*current_ext) { 58104da6b514SChristoph Hellwig if (got->br_startoff < offset_shift_fsb) 5811a904b1caSNamjae Jeon return -EINVAL; 5812a904b1caSNamjae Jeon goto update_current_ext; 5813a904b1caSNamjae Jeon } 5814a904b1caSNamjae Jeon 58154da6b514SChristoph Hellwig /* 58164da6b514SChristoph Hellwig * grab the left extent and check for a large enough hole. 58174da6b514SChristoph Hellwig */ 58184da6b514SChristoph Hellwig xfs_iext_get_extent(ifp, *current_ext - 1, &adj_irec); 58194da6b514SChristoph Hellwig if (startoff < adj_irec.br_startoff + adj_irec.br_blockcount) 5820a979bdfeSBrian Foster return -EINVAL; 5821a979bdfeSBrian Foster 5822a979bdfeSBrian Foster /* check whether to merge the extent or shift it down */ 58234da6b514SChristoph Hellwig if (xfs_bmse_can_merge(&adj_irec, got, offset_shift_fsb)) { 58244da6b514SChristoph Hellwig return xfs_bmse_merge(ip, whichfork, offset_shift_fsb, 58254da6b514SChristoph Hellwig *current_ext, got, &adj_irec, 58264da6b514SChristoph Hellwig cur, logflags, dfops); 5827b11bd671SDave Chinner } 5828a904b1caSNamjae Jeon } else { 58294da6b514SChristoph Hellwig startoff = got->br_startoff + offset_shift_fsb; 5830a904b1caSNamjae Jeon /* nothing to move if this is the last extent */ 5831a904b1caSNamjae Jeon if (*current_ext >= (total_extents - 1)) 5832a904b1caSNamjae Jeon goto update_current_ext; 58334da6b514SChristoph Hellwig 5834a904b1caSNamjae Jeon /* 5835a904b1caSNamjae Jeon * If this is not the last extent in the file, make sure there 5836a904b1caSNamjae Jeon * is enough room between current extent and next extent for 5837a904b1caSNamjae Jeon * accommodating the shift. 5838a904b1caSNamjae Jeon */ 58394da6b514SChristoph Hellwig xfs_iext_get_extent(ifp, *current_ext + 1, &adj_irec); 58404da6b514SChristoph Hellwig if (startoff + got->br_blockcount > adj_irec.br_startoff) 5841b11bd671SDave Chinner return -EINVAL; 58424da6b514SChristoph Hellwig 5843a904b1caSNamjae Jeon /* 5844a904b1caSNamjae Jeon * Unlike a left shift (which involves a hole punch), 5845a904b1caSNamjae Jeon * a right shift does not modify extent neighbors 5846a904b1caSNamjae Jeon * in any way. We should never find mergeable extents 5847a904b1caSNamjae Jeon * in this scenario. Check anyways and warn if we 5848a904b1caSNamjae Jeon * encounter two extents that could be one. 5849a904b1caSNamjae Jeon */ 58504da6b514SChristoph Hellwig if (xfs_bmse_can_merge(got, &adj_irec, offset_shift_fsb)) 5851a904b1caSNamjae Jeon WARN_ON_ONCE(1); 5852a904b1caSNamjae Jeon } 58534da6b514SChristoph Hellwig 5854a979bdfeSBrian Foster /* 5855a979bdfeSBrian Foster * Increment the extent index for the next iteration, update the start 5856a979bdfeSBrian Foster * offset of the in-core extent and update the btree if applicable. 5857a979bdfeSBrian Foster */ 5858a904b1caSNamjae Jeon update_current_ext: 5859a979bdfeSBrian Foster *logflags |= XFS_ILOG_CORE; 5860a979bdfeSBrian Foster 58614da6b514SChristoph Hellwig new = *got; 58624da6b514SChristoph Hellwig new.br_startoff = startoff; 58634da6b514SChristoph Hellwig 58644da6b514SChristoph Hellwig if (cur) { 58654da6b514SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, got->br_startoff, 58664da6b514SChristoph Hellwig got->br_startblock, got->br_blockcount, &i); 5867a979bdfeSBrian Foster if (error) 5868a979bdfeSBrian Foster return error; 58695fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5870a979bdfeSBrian Foster 5871a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &new); 58729c194644SDarrick J. Wong if (error) 58739c194644SDarrick J. Wong return error; 58744da6b514SChristoph Hellwig } else { 58754da6b514SChristoph Hellwig *logflags |= XFS_ILOG_DEXT; 58764da6b514SChristoph Hellwig } 58779c194644SDarrick J. Wong 58784da6b514SChristoph Hellwig xfs_iext_update_extent(ifp, *current_ext, &new); 58794da6b514SChristoph Hellwig 58804da6b514SChristoph Hellwig if (direction == SHIFT_LEFT) 58814da6b514SChristoph Hellwig (*current_ext)++; 58824da6b514SChristoph Hellwig else 58834da6b514SChristoph Hellwig (*current_ext)--; 58844da6b514SChristoph Hellwig 58859c194644SDarrick J. Wong /* update reverse mapping */ 58864da6b514SChristoph Hellwig error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, got); 58879c194644SDarrick J. Wong if (error) 58889c194644SDarrick J. Wong return error; 58894da6b514SChristoph Hellwig return xfs_rmap_map_extent(mp, dfops, ip, whichfork, &new); 5890a979bdfeSBrian Foster } 5891a979bdfeSBrian Foster 5892a979bdfeSBrian Foster /* 5893a904b1caSNamjae Jeon * Shift extent records to the left/right to cover/create a hole. 589430f712c9SDave Chinner * 58952c845f5aSBrian Foster * The maximum number of extents to be shifted in a single operation is 5896a904b1caSNamjae Jeon * @num_exts. @stop_fsb specifies the file offset at which to stop shift and the 58972c845f5aSBrian Foster * file offset where we've left off is returned in @next_fsb. @offset_shift_fsb 58982c845f5aSBrian Foster * is the length by which each extent is shifted. If there is no hole to shift 58992c845f5aSBrian Foster * the extents into, this will be considered invalid operation and we abort 59002c845f5aSBrian Foster * immediately. 590130f712c9SDave Chinner */ 590230f712c9SDave Chinner int 590330f712c9SDave Chinner xfs_bmap_shift_extents( 590430f712c9SDave Chinner struct xfs_trans *tp, 590530f712c9SDave Chinner struct xfs_inode *ip, 5906a904b1caSNamjae Jeon xfs_fileoff_t *next_fsb, 590730f712c9SDave Chinner xfs_fileoff_t offset_shift_fsb, 59082c845f5aSBrian Foster int *done, 5909a904b1caSNamjae Jeon xfs_fileoff_t stop_fsb, 591030f712c9SDave Chinner xfs_fsblock_t *firstblock, 59112c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, 5912a904b1caSNamjae Jeon enum shift_direction direction, 591330f712c9SDave Chinner int num_exts) 591430f712c9SDave Chinner { 5915ca446d88SBrian Foster struct xfs_btree_cur *cur = NULL; 591630f712c9SDave Chinner struct xfs_bmbt_irec got; 591730f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 591830f712c9SDave Chinner struct xfs_ifork *ifp; 591930f712c9SDave Chinner xfs_extnum_t nexts = 0; 59202c845f5aSBrian Foster xfs_extnum_t current_ext; 5921a904b1caSNamjae Jeon xfs_extnum_t total_extents; 5922a904b1caSNamjae Jeon xfs_extnum_t stop_extent; 592330f712c9SDave Chinner int error = 0; 592430f712c9SDave Chinner int whichfork = XFS_DATA_FORK; 5925ca446d88SBrian Foster int logflags = 0; 592630f712c9SDave Chinner 592730f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 592830f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 592930f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 59309e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 593130f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmap_shift_extents", 593230f712c9SDave Chinner XFS_ERRLEVEL_LOW, mp); 59332451337dSDave Chinner return -EFSCORRUPTED; 593430f712c9SDave Chinner } 593530f712c9SDave Chinner 593630f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 59372451337dSDave Chinner return -EIO; 593830f712c9SDave Chinner 59392c845f5aSBrian Foster ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 59402c845f5aSBrian Foster ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 5941a904b1caSNamjae Jeon ASSERT(direction == SHIFT_LEFT || direction == SHIFT_RIGHT); 594230f712c9SDave Chinner 594330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 594430f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 594530f712c9SDave Chinner /* Read in all the extents */ 594630f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 594730f712c9SDave Chinner if (error) 594830f712c9SDave Chinner return error; 594930f712c9SDave Chinner } 595030f712c9SDave Chinner 5951ddb19e31SBrian Foster if (ifp->if_flags & XFS_IFBROOT) { 5952ddb19e31SBrian Foster cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 5953ddb19e31SBrian Foster cur->bc_private.b.firstblock = *firstblock; 59542c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 5955ddb19e31SBrian Foster cur->bc_private.b.flags = 0; 5956ddb19e31SBrian Foster } 5957ddb19e31SBrian Foster 595830f712c9SDave Chinner /* 595930f712c9SDave Chinner * There may be delalloc extents in the data fork before the range we 59602c845f5aSBrian Foster * are collapsing out, so we cannot use the count of real extents here. 59612c845f5aSBrian Foster * Instead we have to calculate it from the incore fork. 596230f712c9SDave Chinner */ 59635d829300SEric Sandeen total_extents = xfs_iext_count(ifp); 5964a904b1caSNamjae Jeon if (total_extents == 0) { 5965a904b1caSNamjae Jeon *done = 1; 5966a904b1caSNamjae Jeon goto del_cursor; 5967a904b1caSNamjae Jeon } 5968a904b1caSNamjae Jeon 5969a904b1caSNamjae Jeon /* 5970a904b1caSNamjae Jeon * In case of first right shift, we need to initialize next_fsb 5971a904b1caSNamjae Jeon */ 5972a904b1caSNamjae Jeon if (*next_fsb == NULLFSBLOCK) { 597305b7c8abSChristoph Hellwig ASSERT(direction == SHIFT_RIGHT); 597405b7c8abSChristoph Hellwig 597505b7c8abSChristoph Hellwig current_ext = total_extents - 1; 59764da6b514SChristoph Hellwig xfs_iext_get_extent(ifp, current_ext, &got); 59774da6b514SChristoph Hellwig if (stop_fsb > got.br_startoff) { 5978a904b1caSNamjae Jeon *done = 1; 5979a904b1caSNamjae Jeon goto del_cursor; 5980a904b1caSNamjae Jeon } 59814da6b514SChristoph Hellwig *next_fsb = got.br_startoff; 598205b7c8abSChristoph Hellwig } else { 5983a904b1caSNamjae Jeon /* 5984a904b1caSNamjae Jeon * Look up the extent index for the fsb where we start shifting. We can 5985a904b1caSNamjae Jeon * henceforth iterate with current_ext as extent list changes are locked 5986a904b1caSNamjae Jeon * out via ilock. 5987a904b1caSNamjae Jeon * 59884da6b514SChristoph Hellwig * If next_fsb lies in a hole beyond which there are no extents we are 59894da6b514SChristoph Hellwig * done. 5990a904b1caSNamjae Jeon */ 59914da6b514SChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, *next_fsb, ¤t_ext, 59924da6b514SChristoph Hellwig &got)) { 5993a904b1caSNamjae Jeon *done = 1; 5994a904b1caSNamjae Jeon goto del_cursor; 5995a904b1caSNamjae Jeon } 599605b7c8abSChristoph Hellwig } 5997a904b1caSNamjae Jeon 599805b7c8abSChristoph Hellwig /* Lookup the extent index at which we have to stop */ 599905b7c8abSChristoph Hellwig if (direction == SHIFT_RIGHT) { 60004da6b514SChristoph Hellwig struct xfs_bmbt_irec s; 60014da6b514SChristoph Hellwig 60024da6b514SChristoph Hellwig xfs_iext_lookup_extent(ip, ifp, stop_fsb, &stop_extent, &s); 600305b7c8abSChristoph Hellwig /* Make stop_extent exclusive of shift range */ 600405b7c8abSChristoph Hellwig stop_extent--; 600505b7c8abSChristoph Hellwig if (current_ext <= stop_extent) { 6006a904b1caSNamjae Jeon error = -EIO; 6007a904b1caSNamjae Jeon goto del_cursor; 6008a904b1caSNamjae Jeon } 600905b7c8abSChristoph Hellwig } else { 601005b7c8abSChristoph Hellwig stop_extent = total_extents; 601105b7c8abSChristoph Hellwig if (current_ext >= stop_extent) { 601205b7c8abSChristoph Hellwig error = -EIO; 601305b7c8abSChristoph Hellwig goto del_cursor; 601405b7c8abSChristoph Hellwig } 601505b7c8abSChristoph Hellwig } 6016a904b1caSNamjae Jeon 6017a904b1caSNamjae Jeon while (nexts++ < num_exts) { 6018a979bdfeSBrian Foster error = xfs_bmse_shift_one(ip, whichfork, offset_shift_fsb, 60194da6b514SChristoph Hellwig ¤t_ext, &got, cur, &logflags, 60209c194644SDarrick J. Wong direction, dfops); 6021ddb19e31SBrian Foster if (error) 6022ddb19e31SBrian Foster goto del_cursor; 6023a904b1caSNamjae Jeon /* 6024a904b1caSNamjae Jeon * If there was an extent merge during the shift, the extent 6025a904b1caSNamjae Jeon * count can change. Update the total and grade the next record. 6026a904b1caSNamjae Jeon */ 6027a904b1caSNamjae Jeon if (direction == SHIFT_LEFT) { 60285d829300SEric Sandeen total_extents = xfs_iext_count(ifp); 6029a904b1caSNamjae Jeon stop_extent = total_extents; 6030a904b1caSNamjae Jeon } 6031a904b1caSNamjae Jeon 6032a904b1caSNamjae Jeon if (current_ext == stop_extent) { 6033a904b1caSNamjae Jeon *done = 1; 6034a904b1caSNamjae Jeon *next_fsb = NULLFSBLOCK; 6035ddb19e31SBrian Foster break; 6036a904b1caSNamjae Jeon } 60374da6b514SChristoph Hellwig xfs_iext_get_extent(ifp, current_ext, &got); 603830f712c9SDave Chinner } 603930f712c9SDave Chinner 60404da6b514SChristoph Hellwig if (!*done) 60412c845f5aSBrian Foster *next_fsb = got.br_startoff; 604230f712c9SDave Chinner 604330f712c9SDave Chinner del_cursor: 604430f712c9SDave Chinner if (cur) 604530f712c9SDave Chinner xfs_btree_del_cursor(cur, 604630f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 604730f712c9SDave Chinner 6048ca446d88SBrian Foster if (logflags) 604930f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 60502c845f5aSBrian Foster 605130f712c9SDave Chinner return error; 605230f712c9SDave Chinner } 6053a904b1caSNamjae Jeon 6054a904b1caSNamjae Jeon /* 6055a904b1caSNamjae Jeon * Splits an extent into two extents at split_fsb block such that it is 6056a904b1caSNamjae Jeon * the first block of the current_ext. @current_ext is a target extent 6057a904b1caSNamjae Jeon * to be split. @split_fsb is a block where the extents is split. 6058a904b1caSNamjae Jeon * If split_fsb lies in a hole or the first block of extents, just return 0. 6059a904b1caSNamjae Jeon */ 6060a904b1caSNamjae Jeon STATIC int 6061a904b1caSNamjae Jeon xfs_bmap_split_extent_at( 6062a904b1caSNamjae Jeon struct xfs_trans *tp, 6063a904b1caSNamjae Jeon struct xfs_inode *ip, 6064a904b1caSNamjae Jeon xfs_fileoff_t split_fsb, 6065a904b1caSNamjae Jeon xfs_fsblock_t *firstfsb, 60662c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops) 6067a904b1caSNamjae Jeon { 6068a904b1caSNamjae Jeon int whichfork = XFS_DATA_FORK; 6069a904b1caSNamjae Jeon struct xfs_btree_cur *cur = NULL; 6070a904b1caSNamjae Jeon struct xfs_bmbt_irec got; 6071a904b1caSNamjae Jeon struct xfs_bmbt_irec new; /* split extent */ 6072a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 6073a904b1caSNamjae Jeon struct xfs_ifork *ifp; 6074a904b1caSNamjae Jeon xfs_fsblock_t gotblkcnt; /* new block count for got */ 6075a904b1caSNamjae Jeon xfs_extnum_t current_ext; 6076a904b1caSNamjae Jeon int error = 0; 6077a904b1caSNamjae Jeon int logflags = 0; 6078a904b1caSNamjae Jeon int i = 0; 6079a904b1caSNamjae Jeon 6080a904b1caSNamjae Jeon if (unlikely(XFS_TEST_ERROR( 6081a904b1caSNamjae Jeon (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 6082a904b1caSNamjae Jeon XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 60839e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 6084a904b1caSNamjae Jeon XFS_ERROR_REPORT("xfs_bmap_split_extent_at", 6085a904b1caSNamjae Jeon XFS_ERRLEVEL_LOW, mp); 6086a904b1caSNamjae Jeon return -EFSCORRUPTED; 6087a904b1caSNamjae Jeon } 6088a904b1caSNamjae Jeon 6089a904b1caSNamjae Jeon if (XFS_FORCED_SHUTDOWN(mp)) 6090a904b1caSNamjae Jeon return -EIO; 6091a904b1caSNamjae Jeon 6092a904b1caSNamjae Jeon ifp = XFS_IFORK_PTR(ip, whichfork); 6093a904b1caSNamjae Jeon if (!(ifp->if_flags & XFS_IFEXTENTS)) { 6094a904b1caSNamjae Jeon /* Read in all the extents */ 6095a904b1caSNamjae Jeon error = xfs_iread_extents(tp, ip, whichfork); 6096a904b1caSNamjae Jeon if (error) 6097a904b1caSNamjae Jeon return error; 6098a904b1caSNamjae Jeon } 6099a904b1caSNamjae Jeon 6100a904b1caSNamjae Jeon /* 61014c35445bSChristoph Hellwig * If there are not extents, or split_fsb lies in a hole we are done. 6102a904b1caSNamjae Jeon */ 61034c35445bSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, split_fsb, ¤t_ext, &got) || 61044c35445bSChristoph Hellwig got.br_startoff >= split_fsb) 6105a904b1caSNamjae Jeon return 0; 6106a904b1caSNamjae Jeon 6107a904b1caSNamjae Jeon gotblkcnt = split_fsb - got.br_startoff; 6108a904b1caSNamjae Jeon new.br_startoff = split_fsb; 6109a904b1caSNamjae Jeon new.br_startblock = got.br_startblock + gotblkcnt; 6110a904b1caSNamjae Jeon new.br_blockcount = got.br_blockcount - gotblkcnt; 6111a904b1caSNamjae Jeon new.br_state = got.br_state; 6112a904b1caSNamjae Jeon 6113a904b1caSNamjae Jeon if (ifp->if_flags & XFS_IFBROOT) { 6114a904b1caSNamjae Jeon cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 6115a904b1caSNamjae Jeon cur->bc_private.b.firstblock = *firstfsb; 61162c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 6117a904b1caSNamjae Jeon cur->bc_private.b.flags = 0; 6118a904b1caSNamjae Jeon error = xfs_bmbt_lookup_eq(cur, got.br_startoff, 6119a904b1caSNamjae Jeon got.br_startblock, 6120a904b1caSNamjae Jeon got.br_blockcount, 6121a904b1caSNamjae Jeon &i); 6122a904b1caSNamjae Jeon if (error) 6123a904b1caSNamjae Jeon goto del_cursor; 6124a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); 6125a904b1caSNamjae Jeon } 6126a904b1caSNamjae Jeon 6127a904b1caSNamjae Jeon got.br_blockcount = gotblkcnt; 61284c35445bSChristoph Hellwig xfs_iext_update_extent(ifp, current_ext, &got); 6129a904b1caSNamjae Jeon 6130a904b1caSNamjae Jeon logflags = XFS_ILOG_CORE; 6131a904b1caSNamjae Jeon if (cur) { 6132a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 6133a904b1caSNamjae Jeon if (error) 6134a904b1caSNamjae Jeon goto del_cursor; 6135a904b1caSNamjae Jeon } else 6136a904b1caSNamjae Jeon logflags |= XFS_ILOG_DEXT; 6137a904b1caSNamjae Jeon 6138a904b1caSNamjae Jeon /* Add new extent */ 6139a904b1caSNamjae Jeon current_ext++; 6140a904b1caSNamjae Jeon xfs_iext_insert(ip, current_ext, 1, &new, 0); 6141a904b1caSNamjae Jeon XFS_IFORK_NEXT_SET(ip, whichfork, 6142a904b1caSNamjae Jeon XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 6143a904b1caSNamjae Jeon 6144a904b1caSNamjae Jeon if (cur) { 6145a904b1caSNamjae Jeon error = xfs_bmbt_lookup_eq(cur, new.br_startoff, 6146a904b1caSNamjae Jeon new.br_startblock, new.br_blockcount, 6147a904b1caSNamjae Jeon &i); 6148a904b1caSNamjae Jeon if (error) 6149a904b1caSNamjae Jeon goto del_cursor; 6150a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 0, del_cursor); 6151a904b1caSNamjae Jeon cur->bc_rec.b.br_state = new.br_state; 6152a904b1caSNamjae Jeon 6153a904b1caSNamjae Jeon error = xfs_btree_insert(cur, &i); 6154a904b1caSNamjae Jeon if (error) 6155a904b1caSNamjae Jeon goto del_cursor; 6156a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); 6157a904b1caSNamjae Jeon } 6158a904b1caSNamjae Jeon 6159a904b1caSNamjae Jeon /* 6160a904b1caSNamjae Jeon * Convert to a btree if necessary. 6161a904b1caSNamjae Jeon */ 6162a904b1caSNamjae Jeon if (xfs_bmap_needs_btree(ip, whichfork)) { 6163a904b1caSNamjae Jeon int tmp_logflags; /* partial log flag return val */ 6164a904b1caSNamjae Jeon 6165a904b1caSNamjae Jeon ASSERT(cur == NULL); 61662c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstfsb, dfops, 6167a904b1caSNamjae Jeon &cur, 0, &tmp_logflags, whichfork); 6168a904b1caSNamjae Jeon logflags |= tmp_logflags; 6169a904b1caSNamjae Jeon } 6170a904b1caSNamjae Jeon 6171a904b1caSNamjae Jeon del_cursor: 6172a904b1caSNamjae Jeon if (cur) { 6173a904b1caSNamjae Jeon cur->bc_private.b.allocated = 0; 6174a904b1caSNamjae Jeon xfs_btree_del_cursor(cur, 6175a904b1caSNamjae Jeon error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 6176a904b1caSNamjae Jeon } 6177a904b1caSNamjae Jeon 6178a904b1caSNamjae Jeon if (logflags) 6179a904b1caSNamjae Jeon xfs_trans_log_inode(tp, ip, logflags); 6180a904b1caSNamjae Jeon return error; 6181a904b1caSNamjae Jeon } 6182a904b1caSNamjae Jeon 6183a904b1caSNamjae Jeon int 6184a904b1caSNamjae Jeon xfs_bmap_split_extent( 6185a904b1caSNamjae Jeon struct xfs_inode *ip, 6186a904b1caSNamjae Jeon xfs_fileoff_t split_fsb) 6187a904b1caSNamjae Jeon { 6188a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 6189a904b1caSNamjae Jeon struct xfs_trans *tp; 61902c3234d1SDarrick J. Wong struct xfs_defer_ops dfops; 6191a904b1caSNamjae Jeon xfs_fsblock_t firstfsb; 6192a904b1caSNamjae Jeon int error; 6193a904b1caSNamjae Jeon 6194253f4911SChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 6195253f4911SChristoph Hellwig XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp); 6196253f4911SChristoph Hellwig if (error) 6197a904b1caSNamjae Jeon return error; 6198a904b1caSNamjae Jeon 6199a904b1caSNamjae Jeon xfs_ilock(ip, XFS_ILOCK_EXCL); 6200a904b1caSNamjae Jeon xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 6201a904b1caSNamjae Jeon 62022c3234d1SDarrick J. Wong xfs_defer_init(&dfops, &firstfsb); 6203a904b1caSNamjae Jeon 6204a904b1caSNamjae Jeon error = xfs_bmap_split_extent_at(tp, ip, split_fsb, 62052c3234d1SDarrick J. Wong &firstfsb, &dfops); 6206a904b1caSNamjae Jeon if (error) 6207a904b1caSNamjae Jeon goto out; 6208a904b1caSNamjae Jeon 62098ad7c629SChristoph Hellwig error = xfs_defer_finish(&tp, &dfops); 6210a904b1caSNamjae Jeon if (error) 6211a904b1caSNamjae Jeon goto out; 6212a904b1caSNamjae Jeon 621370393313SChristoph Hellwig return xfs_trans_commit(tp); 6214a904b1caSNamjae Jeon 6215a904b1caSNamjae Jeon out: 62162c3234d1SDarrick J. Wong xfs_defer_cancel(&dfops); 62174906e215SChristoph Hellwig xfs_trans_cancel(tp); 6218a904b1caSNamjae Jeon return error; 6219a904b1caSNamjae Jeon } 62209f3afb57SDarrick J. Wong 62219f3afb57SDarrick J. Wong /* Deferred mapping is only for real extents in the data fork. */ 62229f3afb57SDarrick J. Wong static bool 62239f3afb57SDarrick J. Wong xfs_bmap_is_update_needed( 62249f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 62259f3afb57SDarrick J. Wong { 62269f3afb57SDarrick J. Wong return bmap->br_startblock != HOLESTARTBLOCK && 62279f3afb57SDarrick J. Wong bmap->br_startblock != DELAYSTARTBLOCK; 62289f3afb57SDarrick J. Wong } 62299f3afb57SDarrick J. Wong 62309f3afb57SDarrick J. Wong /* Record a bmap intent. */ 62319f3afb57SDarrick J. Wong static int 62329f3afb57SDarrick J. Wong __xfs_bmap_add( 62339f3afb57SDarrick J. Wong struct xfs_mount *mp, 62349f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 62359f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 62369f3afb57SDarrick J. Wong struct xfs_inode *ip, 62379f3afb57SDarrick J. Wong int whichfork, 62389f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 62399f3afb57SDarrick J. Wong { 62409f3afb57SDarrick J. Wong int error; 62419f3afb57SDarrick J. Wong struct xfs_bmap_intent *bi; 62429f3afb57SDarrick J. Wong 62439f3afb57SDarrick J. Wong trace_xfs_bmap_defer(mp, 62449f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(mp, bmap->br_startblock), 62459f3afb57SDarrick J. Wong type, 62469f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(mp, bmap->br_startblock), 62479f3afb57SDarrick J. Wong ip->i_ino, whichfork, 62489f3afb57SDarrick J. Wong bmap->br_startoff, 62499f3afb57SDarrick J. Wong bmap->br_blockcount, 62509f3afb57SDarrick J. Wong bmap->br_state); 62519f3afb57SDarrick J. Wong 62529f3afb57SDarrick J. Wong bi = kmem_alloc(sizeof(struct xfs_bmap_intent), KM_SLEEP | KM_NOFS); 62539f3afb57SDarrick J. Wong INIT_LIST_HEAD(&bi->bi_list); 62549f3afb57SDarrick J. Wong bi->bi_type = type; 62559f3afb57SDarrick J. Wong bi->bi_owner = ip; 62569f3afb57SDarrick J. Wong bi->bi_whichfork = whichfork; 62579f3afb57SDarrick J. Wong bi->bi_bmap = *bmap; 62589f3afb57SDarrick J. Wong 6259882d8785SChristoph Hellwig error = xfs_defer_ijoin(dfops, bi->bi_owner); 62609f3afb57SDarrick J. Wong if (error) { 62619f3afb57SDarrick J. Wong kmem_free(bi); 62629f3afb57SDarrick J. Wong return error; 62639f3afb57SDarrick J. Wong } 62649f3afb57SDarrick J. Wong 62659f3afb57SDarrick J. Wong xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_BMAP, &bi->bi_list); 62669f3afb57SDarrick J. Wong return 0; 62679f3afb57SDarrick J. Wong } 62689f3afb57SDarrick J. Wong 62699f3afb57SDarrick J. Wong /* Map an extent into a file. */ 62709f3afb57SDarrick J. Wong int 62719f3afb57SDarrick J. Wong xfs_bmap_map_extent( 62729f3afb57SDarrick J. Wong struct xfs_mount *mp, 62739f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 62749f3afb57SDarrick J. Wong struct xfs_inode *ip, 62759f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 62769f3afb57SDarrick J. Wong { 62779f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 62789f3afb57SDarrick J. Wong return 0; 62799f3afb57SDarrick J. Wong 62809f3afb57SDarrick J. Wong return __xfs_bmap_add(mp, dfops, XFS_BMAP_MAP, ip, 62819f3afb57SDarrick J. Wong XFS_DATA_FORK, PREV); 62829f3afb57SDarrick J. Wong } 62839f3afb57SDarrick J. Wong 62849f3afb57SDarrick J. Wong /* Unmap an extent out of a file. */ 62859f3afb57SDarrick J. Wong int 62869f3afb57SDarrick J. Wong xfs_bmap_unmap_extent( 62879f3afb57SDarrick J. Wong struct xfs_mount *mp, 62889f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 62899f3afb57SDarrick J. Wong struct xfs_inode *ip, 62909f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 62919f3afb57SDarrick J. Wong { 62929f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 62939f3afb57SDarrick J. Wong return 0; 62949f3afb57SDarrick J. Wong 62959f3afb57SDarrick J. Wong return __xfs_bmap_add(mp, dfops, XFS_BMAP_UNMAP, ip, 62969f3afb57SDarrick J. Wong XFS_DATA_FORK, PREV); 62979f3afb57SDarrick J. Wong } 62989f3afb57SDarrick J. Wong 62999f3afb57SDarrick J. Wong /* 63009f3afb57SDarrick J. Wong * Process one of the deferred bmap operations. We pass back the 63019f3afb57SDarrick J. Wong * btree cursor to maintain our lock on the bmapbt between calls. 63029f3afb57SDarrick J. Wong */ 63039f3afb57SDarrick J. Wong int 63049f3afb57SDarrick J. Wong xfs_bmap_finish_one( 63059f3afb57SDarrick J. Wong struct xfs_trans *tp, 63069f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 63079f3afb57SDarrick J. Wong struct xfs_inode *ip, 63089f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 63099f3afb57SDarrick J. Wong int whichfork, 63109f3afb57SDarrick J. Wong xfs_fileoff_t startoff, 63119f3afb57SDarrick J. Wong xfs_fsblock_t startblock, 6312e1a4e37cSDarrick J. Wong xfs_filblks_t *blockcount, 63139f3afb57SDarrick J. Wong xfs_exntst_t state) 63149f3afb57SDarrick J. Wong { 6315e1a4e37cSDarrick J. Wong xfs_fsblock_t firstfsb; 6316e1a4e37cSDarrick J. Wong int error = 0; 63179f3afb57SDarrick J. Wong 63184c1a67bdSDarrick J. Wong /* 63194c1a67bdSDarrick J. Wong * firstfsb is tied to the transaction lifetime and is used to 63204c1a67bdSDarrick J. Wong * ensure correct AG locking order and schedule work item 63214c1a67bdSDarrick J. Wong * continuations. XFS_BUI_MAX_FAST_EXTENTS (== 1) restricts us 63224c1a67bdSDarrick J. Wong * to only making one bmap call per transaction, so it should 63234c1a67bdSDarrick J. Wong * be safe to have it as a local variable here. 63244c1a67bdSDarrick J. Wong */ 63254c1a67bdSDarrick J. Wong firstfsb = NULLFSBLOCK; 63264c1a67bdSDarrick J. Wong 63279f3afb57SDarrick J. Wong trace_xfs_bmap_deferred(tp->t_mountp, 63289f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type, 63299f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(tp->t_mountp, startblock), 6330e1a4e37cSDarrick J. Wong ip->i_ino, whichfork, startoff, *blockcount, state); 63319f3afb57SDarrick J. Wong 633239e07daaSChristoph Hellwig if (WARN_ON_ONCE(whichfork != XFS_DATA_FORK)) 63339f3afb57SDarrick J. Wong return -EFSCORRUPTED; 63349f3afb57SDarrick J. Wong 63359f3afb57SDarrick J. Wong if (XFS_TEST_ERROR(false, tp->t_mountp, 63369e24cfd0SDarrick J. Wong XFS_ERRTAG_BMAP_FINISH_ONE)) 63379f3afb57SDarrick J. Wong return -EIO; 63389f3afb57SDarrick J. Wong 63399f3afb57SDarrick J. Wong switch (type) { 63409f3afb57SDarrick J. Wong case XFS_BMAP_MAP: 6341e1a4e37cSDarrick J. Wong error = xfs_bmapi_remap(tp, ip, startoff, *blockcount, 63426ebd5a44SChristoph Hellwig startblock, dfops); 6343e1a4e37cSDarrick J. Wong *blockcount = 0; 63449f3afb57SDarrick J. Wong break; 63459f3afb57SDarrick J. Wong case XFS_BMAP_UNMAP: 6346e1a4e37cSDarrick J. Wong error = __xfs_bunmapi(tp, ip, startoff, blockcount, 6347e1a4e37cSDarrick J. Wong XFS_BMAPI_REMAP, 1, &firstfsb, dfops); 63489f3afb57SDarrick J. Wong break; 63499f3afb57SDarrick J. Wong default: 63509f3afb57SDarrick J. Wong ASSERT(0); 63519f3afb57SDarrick J. Wong error = -EFSCORRUPTED; 63529f3afb57SDarrick J. Wong } 63539f3afb57SDarrick J. Wong 63549f3afb57SDarrick J. Wong return error; 63559f3afb57SDarrick J. Wong } 6356