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" 41e9e899a2SDarrick J. Wong #include "xfs_errortag.h" 4230f712c9SDave Chinner #include "xfs_error.h" 4330f712c9SDave Chinner #include "xfs_quota.h" 4430f712c9SDave Chinner #include "xfs_trans_space.h" 4530f712c9SDave Chinner #include "xfs_buf_item.h" 4630f712c9SDave Chinner #include "xfs_trace.h" 4730f712c9SDave Chinner #include "xfs_symlink.h" 4830f712c9SDave Chinner #include "xfs_attr_leaf.h" 4930f712c9SDave Chinner #include "xfs_filestream.h" 50340785ccSDarrick J. Wong #include "xfs_rmap.h" 513fd129b6SDarrick J. Wong #include "xfs_ag_resv.h" 5262aab20fSDarrick J. Wong #include "xfs_refcount.h" 53974ae922SBrian Foster #include "xfs_icache.h" 5430f712c9SDave Chinner 5530f712c9SDave Chinner 5630f712c9SDave Chinner kmem_zone_t *xfs_bmap_free_item_zone; 5730f712c9SDave Chinner 5830f712c9SDave Chinner /* 5930f712c9SDave Chinner * Miscellaneous helper functions 6030f712c9SDave Chinner */ 6130f712c9SDave Chinner 6230f712c9SDave Chinner /* 6330f712c9SDave Chinner * Compute and fill in the value of the maximum depth of a bmap btree 6430f712c9SDave Chinner * in this filesystem. Done once, during mount. 6530f712c9SDave Chinner */ 6630f712c9SDave Chinner void 6730f712c9SDave Chinner xfs_bmap_compute_maxlevels( 6830f712c9SDave Chinner xfs_mount_t *mp, /* file system mount structure */ 6930f712c9SDave Chinner int whichfork) /* data or attr fork */ 7030f712c9SDave Chinner { 7130f712c9SDave Chinner int level; /* btree level */ 7230f712c9SDave Chinner uint maxblocks; /* max blocks at this level */ 7330f712c9SDave Chinner uint maxleafents; /* max leaf entries possible */ 7430f712c9SDave Chinner int maxrootrecs; /* max records in root block */ 7530f712c9SDave Chinner int minleafrecs; /* min records in leaf block */ 7630f712c9SDave Chinner int minnoderecs; /* min records in node block */ 7730f712c9SDave Chinner int sz; /* root block size */ 7830f712c9SDave Chinner 7930f712c9SDave Chinner /* 8030f712c9SDave Chinner * The maximum number of extents in a file, hence the maximum 8130f712c9SDave Chinner * number of leaf entries, is controlled by the type of di_nextents 8230f712c9SDave Chinner * (a signed 32-bit number, xfs_extnum_t), or by di_anextents 8330f712c9SDave Chinner * (a signed 16-bit number, xfs_aextnum_t). 8430f712c9SDave Chinner * 8530f712c9SDave Chinner * Note that we can no longer assume that if we are in ATTR1 that 8630f712c9SDave Chinner * the fork offset of all the inodes will be 8730f712c9SDave Chinner * (xfs_default_attroffset(ip) >> 3) because we could have mounted 8830f712c9SDave Chinner * with ATTR2 and then mounted back with ATTR1, keeping the 8930f712c9SDave Chinner * di_forkoff's fixed but probably at various positions. Therefore, 9030f712c9SDave Chinner * for both ATTR1 and ATTR2 we have to assume the worst case scenario 9130f712c9SDave Chinner * of a minimum size available. 9230f712c9SDave Chinner */ 9330f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) { 9430f712c9SDave Chinner maxleafents = MAXEXTNUM; 9530f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); 9630f712c9SDave Chinner } else { 9730f712c9SDave Chinner maxleafents = MAXAEXTNUM; 9830f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); 9930f712c9SDave Chinner } 10030f712c9SDave Chinner maxrootrecs = xfs_bmdr_maxrecs(sz, 0); 10130f712c9SDave Chinner minleafrecs = mp->m_bmap_dmnr[0]; 10230f712c9SDave Chinner minnoderecs = mp->m_bmap_dmnr[1]; 10330f712c9SDave Chinner maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; 10430f712c9SDave Chinner for (level = 1; maxblocks > 1; level++) { 10530f712c9SDave Chinner if (maxblocks <= maxrootrecs) 10630f712c9SDave Chinner maxblocks = 1; 10730f712c9SDave Chinner else 10830f712c9SDave Chinner maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; 10930f712c9SDave Chinner } 11030f712c9SDave Chinner mp->m_bm_maxlevels[whichfork] = level; 11130f712c9SDave Chinner } 11230f712c9SDave Chinner 11330f712c9SDave Chinner STATIC int /* error */ 11430f712c9SDave Chinner xfs_bmbt_lookup_eq( 11530f712c9SDave Chinner struct xfs_btree_cur *cur, 116e16cf9b0SChristoph Hellwig struct xfs_bmbt_irec *irec, 11730f712c9SDave Chinner int *stat) /* success/failure */ 11830f712c9SDave Chinner { 119e16cf9b0SChristoph Hellwig cur->bc_rec.b = *irec; 12030f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); 12130f712c9SDave Chinner } 12230f712c9SDave Chinner 12330f712c9SDave Chinner STATIC int /* error */ 124b5cfbc22SChristoph Hellwig xfs_bmbt_lookup_first( 12530f712c9SDave Chinner struct xfs_btree_cur *cur, 12630f712c9SDave Chinner int *stat) /* success/failure */ 12730f712c9SDave Chinner { 128b5cfbc22SChristoph Hellwig cur->bc_rec.b.br_startoff = 0; 129b5cfbc22SChristoph Hellwig cur->bc_rec.b.br_startblock = 0; 130b5cfbc22SChristoph Hellwig cur->bc_rec.b.br_blockcount = 0; 13130f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); 13230f712c9SDave Chinner } 13330f712c9SDave Chinner 13430f712c9SDave Chinner /* 13530f712c9SDave Chinner * Check if the inode needs to be converted to btree format. 13630f712c9SDave Chinner */ 13730f712c9SDave Chinner static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) 13830f712c9SDave Chinner { 13960b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 14060b4984fSDarrick J. Wong XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && 14130f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) > 14230f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork); 14330f712c9SDave Chinner } 14430f712c9SDave Chinner 14530f712c9SDave Chinner /* 14630f712c9SDave Chinner * Check if the inode should be converted to extent format. 14730f712c9SDave Chinner */ 14830f712c9SDave Chinner static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) 14930f712c9SDave Chinner { 15060b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 15160b4984fSDarrick J. Wong XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && 15230f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) <= 15330f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork); 15430f712c9SDave Chinner } 15530f712c9SDave Chinner 15630f712c9SDave Chinner /* 157a67d00a5SChristoph Hellwig * Update the record referred to by cur to the value given by irec 15830f712c9SDave Chinner * This either works (return 0) or gets an EFSCORRUPTED error. 15930f712c9SDave Chinner */ 16030f712c9SDave Chinner STATIC int 16130f712c9SDave Chinner xfs_bmbt_update( 16230f712c9SDave Chinner struct xfs_btree_cur *cur, 163a67d00a5SChristoph Hellwig struct xfs_bmbt_irec *irec) 16430f712c9SDave Chinner { 16530f712c9SDave Chinner union xfs_btree_rec rec; 16630f712c9SDave Chinner 167a67d00a5SChristoph Hellwig xfs_bmbt_disk_set_all(&rec.bmbt, irec); 16830f712c9SDave Chinner return xfs_btree_update(cur, &rec); 16930f712c9SDave Chinner } 17030f712c9SDave Chinner 17130f712c9SDave Chinner /* 17230f712c9SDave Chinner * Compute the worst-case number of indirect blocks that will be used 17330f712c9SDave Chinner * for ip's delayed extent of length "len". 17430f712c9SDave Chinner */ 17530f712c9SDave Chinner STATIC xfs_filblks_t 17630f712c9SDave Chinner xfs_bmap_worst_indlen( 17730f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 17830f712c9SDave Chinner xfs_filblks_t len) /* delayed extent length */ 17930f712c9SDave Chinner { 18030f712c9SDave Chinner int level; /* btree level number */ 18130f712c9SDave Chinner int maxrecs; /* maximum record count at this level */ 18230f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 18330f712c9SDave Chinner xfs_filblks_t rval; /* return value */ 18430f712c9SDave Chinner 18530f712c9SDave Chinner mp = ip->i_mount; 18630f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[0]; 18730f712c9SDave Chinner for (level = 0, rval = 0; 18830f712c9SDave Chinner level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); 18930f712c9SDave Chinner level++) { 19030f712c9SDave Chinner len += maxrecs - 1; 19130f712c9SDave Chinner do_div(len, maxrecs); 19230f712c9SDave Chinner rval += len; 1935e5c943cSDarrick J. Wong if (len == 1) 1945e5c943cSDarrick J. Wong return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - 19530f712c9SDave Chinner level - 1; 19630f712c9SDave Chinner if (level == 0) 19730f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[1]; 19830f712c9SDave Chinner } 19930f712c9SDave Chinner return rval; 20030f712c9SDave Chinner } 20130f712c9SDave Chinner 20230f712c9SDave Chinner /* 20330f712c9SDave Chinner * Calculate the default attribute fork offset for newly created inodes. 20430f712c9SDave Chinner */ 20530f712c9SDave Chinner uint 20630f712c9SDave Chinner xfs_default_attroffset( 20730f712c9SDave Chinner struct xfs_inode *ip) 20830f712c9SDave Chinner { 20930f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 21030f712c9SDave Chinner uint offset; 21130f712c9SDave Chinner 21230f712c9SDave Chinner if (mp->m_sb.sb_inodesize == 256) { 21330f712c9SDave Chinner offset = XFS_LITINO(mp, ip->i_d.di_version) - 21430f712c9SDave Chinner XFS_BMDR_SPACE_CALC(MINABTPTRS); 21530f712c9SDave Chinner } else { 21630f712c9SDave Chinner offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); 21730f712c9SDave Chinner } 21830f712c9SDave Chinner 21930f712c9SDave Chinner ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); 22030f712c9SDave Chinner return offset; 22130f712c9SDave Chinner } 22230f712c9SDave Chinner 22330f712c9SDave Chinner /* 22430f712c9SDave Chinner * Helper routine to reset inode di_forkoff field when switching 22530f712c9SDave Chinner * attribute fork from local to extent format - we reset it where 22630f712c9SDave Chinner * possible to make space available for inline data fork extents. 22730f712c9SDave Chinner */ 22830f712c9SDave Chinner STATIC void 22930f712c9SDave Chinner xfs_bmap_forkoff_reset( 23030f712c9SDave Chinner xfs_inode_t *ip, 23130f712c9SDave Chinner int whichfork) 23230f712c9SDave Chinner { 23330f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK && 23430f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_DEV && 23530f712c9SDave Chinner ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { 23630f712c9SDave Chinner uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; 23730f712c9SDave Chinner 23830f712c9SDave Chinner if (dfl_forkoff > ip->i_d.di_forkoff) 23930f712c9SDave Chinner ip->i_d.di_forkoff = dfl_forkoff; 24030f712c9SDave Chinner } 24130f712c9SDave Chinner } 24230f712c9SDave Chinner 24330f712c9SDave Chinner #ifdef DEBUG 24430f712c9SDave Chinner STATIC struct xfs_buf * 24530f712c9SDave Chinner xfs_bmap_get_bp( 24630f712c9SDave Chinner struct xfs_btree_cur *cur, 24730f712c9SDave Chinner xfs_fsblock_t bno) 24830f712c9SDave Chinner { 24930f712c9SDave Chinner struct xfs_log_item_desc *lidp; 25030f712c9SDave Chinner int i; 25130f712c9SDave Chinner 25230f712c9SDave Chinner if (!cur) 25330f712c9SDave Chinner return NULL; 25430f712c9SDave Chinner 25530f712c9SDave Chinner for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { 25630f712c9SDave Chinner if (!cur->bc_bufs[i]) 25730f712c9SDave Chinner break; 25830f712c9SDave Chinner if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) 25930f712c9SDave Chinner return cur->bc_bufs[i]; 26030f712c9SDave Chinner } 26130f712c9SDave Chinner 26230f712c9SDave Chinner /* Chase down all the log items to see if the bp is there */ 26330f712c9SDave Chinner list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { 26430f712c9SDave Chinner struct xfs_buf_log_item *bip; 26530f712c9SDave Chinner bip = (struct xfs_buf_log_item *)lidp->lid_item; 26630f712c9SDave Chinner if (bip->bli_item.li_type == XFS_LI_BUF && 26730f712c9SDave Chinner XFS_BUF_ADDR(bip->bli_buf) == bno) 26830f712c9SDave Chinner return bip->bli_buf; 26930f712c9SDave Chinner } 27030f712c9SDave Chinner 27130f712c9SDave Chinner return NULL; 27230f712c9SDave Chinner } 27330f712c9SDave Chinner 27430f712c9SDave Chinner STATIC void 27530f712c9SDave Chinner xfs_check_block( 27630f712c9SDave Chinner struct xfs_btree_block *block, 27730f712c9SDave Chinner xfs_mount_t *mp, 27830f712c9SDave Chinner int root, 27930f712c9SDave Chinner short sz) 28030f712c9SDave Chinner { 28130f712c9SDave Chinner int i, j, dmxr; 28230f712c9SDave Chinner __be64 *pp, *thispa; /* pointer to block address */ 28330f712c9SDave Chinner xfs_bmbt_key_t *prevp, *keyp; 28430f712c9SDave Chinner 28530f712c9SDave Chinner ASSERT(be16_to_cpu(block->bb_level) > 0); 28630f712c9SDave Chinner 28730f712c9SDave Chinner prevp = NULL; 28830f712c9SDave Chinner for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { 28930f712c9SDave Chinner dmxr = mp->m_bmap_dmxr[0]; 29030f712c9SDave Chinner keyp = XFS_BMBT_KEY_ADDR(mp, block, i); 29130f712c9SDave Chinner 29230f712c9SDave Chinner if (prevp) { 29330f712c9SDave Chinner ASSERT(be64_to_cpu(prevp->br_startoff) < 29430f712c9SDave Chinner be64_to_cpu(keyp->br_startoff)); 29530f712c9SDave Chinner } 29630f712c9SDave Chinner prevp = keyp; 29730f712c9SDave Chinner 29830f712c9SDave Chinner /* 29930f712c9SDave Chinner * Compare the block numbers to see if there are dups. 30030f712c9SDave Chinner */ 30130f712c9SDave Chinner if (root) 30230f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); 30330f712c9SDave Chinner else 30430f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); 30530f712c9SDave Chinner 30630f712c9SDave Chinner for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { 30730f712c9SDave Chinner if (root) 30830f712c9SDave Chinner thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); 30930f712c9SDave Chinner else 31030f712c9SDave Chinner thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); 31130f712c9SDave Chinner if (*thispa == *pp) { 31230f712c9SDave Chinner xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", 31330f712c9SDave Chinner __func__, j, i, 31430f712c9SDave Chinner (unsigned long long)be64_to_cpu(*thispa)); 31530f712c9SDave Chinner panic("%s: ptrs are equal in node\n", 31630f712c9SDave Chinner __func__); 31730f712c9SDave Chinner } 31830f712c9SDave Chinner } 31930f712c9SDave Chinner } 32030f712c9SDave Chinner } 32130f712c9SDave Chinner 32230f712c9SDave Chinner /* 32330f712c9SDave Chinner * Check that the extents for the inode ip are in the right order in all 324e3543819SDave Chinner * btree leaves. THis becomes prohibitively expensive for large extent count 325e3543819SDave Chinner * files, so don't bother with inodes that have more than 10,000 extents in 326e3543819SDave Chinner * them. The btree record ordering checks will still be done, so for such large 327e3543819SDave Chinner * bmapbt constructs that is going to catch most corruptions. 32830f712c9SDave Chinner */ 32930f712c9SDave Chinner STATIC void 33030f712c9SDave Chinner xfs_bmap_check_leaf_extents( 33130f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor or null */ 33230f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 33330f712c9SDave Chinner int whichfork) /* data or attr fork */ 33430f712c9SDave Chinner { 33530f712c9SDave Chinner struct xfs_btree_block *block; /* current btree block */ 33630f712c9SDave Chinner xfs_fsblock_t bno; /* block # of "block" */ 33730f712c9SDave Chinner xfs_buf_t *bp; /* buffer for "block" */ 33830f712c9SDave Chinner int error; /* error return value */ 33930f712c9SDave Chinner xfs_extnum_t i=0, j; /* index into the extents list */ 34030f712c9SDave Chinner xfs_ifork_t *ifp; /* fork structure */ 34130f712c9SDave Chinner int level; /* btree level, for checking */ 34230f712c9SDave Chinner xfs_mount_t *mp; /* file system mount structure */ 34330f712c9SDave Chinner __be64 *pp; /* pointer to block address */ 34430f712c9SDave Chinner xfs_bmbt_rec_t *ep; /* pointer to current extent */ 34530f712c9SDave Chinner xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ 34630f712c9SDave Chinner xfs_bmbt_rec_t *nextp; /* pointer to next extent */ 34730f712c9SDave Chinner int bp_release = 0; 34830f712c9SDave Chinner 34930f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { 35030f712c9SDave Chinner return; 35130f712c9SDave Chinner } 35230f712c9SDave Chinner 353e3543819SDave Chinner /* skip large extent count inodes */ 354e3543819SDave Chinner if (ip->i_d.di_nextents > 10000) 355e3543819SDave Chinner return; 356e3543819SDave Chinner 35730f712c9SDave Chinner bno = NULLFSBLOCK; 35830f712c9SDave Chinner mp = ip->i_mount; 35930f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 36030f712c9SDave Chinner block = ifp->if_broot; 36130f712c9SDave Chinner /* 36230f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 36330f712c9SDave Chinner */ 36430f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 36530f712c9SDave Chinner ASSERT(level > 0); 36630f712c9SDave Chinner xfs_check_block(block, mp, 1, ifp->if_broot_bytes); 36730f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 36830f712c9SDave Chinner bno = be64_to_cpu(*pp); 36930f712c9SDave Chinner 370d5cf09baSChristoph Hellwig ASSERT(bno != NULLFSBLOCK); 37130f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); 37230f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); 37330f712c9SDave Chinner 37430f712c9SDave Chinner /* 37530f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 37630f712c9SDave Chinner * pointer (leftmost) at each level. 37730f712c9SDave Chinner */ 37830f712c9SDave Chinner while (level-- > 0) { 37930f712c9SDave Chinner /* See if buf is in cur first */ 38030f712c9SDave Chinner bp_release = 0; 38130f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 38230f712c9SDave Chinner if (!bp) { 38330f712c9SDave Chinner bp_release = 1; 38430f712c9SDave Chinner error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, 38530f712c9SDave Chinner XFS_BMAP_BTREE_REF, 38630f712c9SDave Chinner &xfs_bmbt_buf_ops); 38730f712c9SDave Chinner if (error) 38830f712c9SDave Chinner goto error_norelse; 38930f712c9SDave Chinner } 39030f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 39130f712c9SDave Chinner if (level == 0) 39230f712c9SDave Chinner break; 39330f712c9SDave Chinner 39430f712c9SDave Chinner /* 39530f712c9SDave Chinner * Check this block for basic sanity (increasing keys and 39630f712c9SDave Chinner * no duplicate blocks). 39730f712c9SDave Chinner */ 39830f712c9SDave Chinner 39930f712c9SDave Chinner xfs_check_block(block, mp, 0, 0); 40030f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 40130f712c9SDave Chinner bno = be64_to_cpu(*pp); 402c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 403c29aad41SEric Sandeen XFS_FSB_SANITY_CHECK(mp, bno), error0); 40430f712c9SDave Chinner if (bp_release) { 40530f712c9SDave Chinner bp_release = 0; 40630f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 40730f712c9SDave Chinner } 40830f712c9SDave Chinner } 40930f712c9SDave Chinner 41030f712c9SDave Chinner /* 41130f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 41230f712c9SDave Chinner */ 41330f712c9SDave Chinner i = 0; 41430f712c9SDave Chinner 41530f712c9SDave Chinner /* 41630f712c9SDave Chinner * Loop over all leaf nodes checking that all extents are in the right order. 41730f712c9SDave Chinner */ 41830f712c9SDave Chinner for (;;) { 41930f712c9SDave Chinner xfs_fsblock_t nextbno; 42030f712c9SDave Chinner xfs_extnum_t num_recs; 42130f712c9SDave Chinner 42230f712c9SDave Chinner 42330f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 42430f712c9SDave Chinner 42530f712c9SDave Chinner /* 42630f712c9SDave Chinner * Read-ahead the next leaf block, if any. 42730f712c9SDave Chinner */ 42830f712c9SDave Chinner 42930f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 43030f712c9SDave Chinner 43130f712c9SDave Chinner /* 43230f712c9SDave Chinner * Check all the extents to make sure they are OK. 43330f712c9SDave Chinner * If we had a previous block, the last entry should 43430f712c9SDave Chinner * conform with the first entry in this one. 43530f712c9SDave Chinner */ 43630f712c9SDave Chinner 43730f712c9SDave Chinner ep = XFS_BMBT_REC_ADDR(mp, block, 1); 43830f712c9SDave Chinner if (i) { 43930f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(&last) + 44030f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(&last) <= 44130f712c9SDave Chinner xfs_bmbt_disk_get_startoff(ep)); 44230f712c9SDave Chinner } 44330f712c9SDave Chinner for (j = 1; j < num_recs; j++) { 44430f712c9SDave Chinner nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); 44530f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(ep) + 44630f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(ep) <= 44730f712c9SDave Chinner xfs_bmbt_disk_get_startoff(nextp)); 44830f712c9SDave Chinner ep = nextp; 44930f712c9SDave Chinner } 45030f712c9SDave Chinner 45130f712c9SDave Chinner last = *ep; 45230f712c9SDave Chinner i += num_recs; 45330f712c9SDave Chinner if (bp_release) { 45430f712c9SDave Chinner bp_release = 0; 45530f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 45630f712c9SDave Chinner } 45730f712c9SDave Chinner bno = nextbno; 45830f712c9SDave Chinner /* 45930f712c9SDave Chinner * If we've reached the end, stop. 46030f712c9SDave Chinner */ 46130f712c9SDave Chinner if (bno == NULLFSBLOCK) 46230f712c9SDave Chinner break; 46330f712c9SDave Chinner 46430f712c9SDave Chinner bp_release = 0; 46530f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 46630f712c9SDave Chinner if (!bp) { 46730f712c9SDave Chinner bp_release = 1; 46830f712c9SDave Chinner error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, 46930f712c9SDave Chinner XFS_BMAP_BTREE_REF, 47030f712c9SDave Chinner &xfs_bmbt_buf_ops); 47130f712c9SDave Chinner if (error) 47230f712c9SDave Chinner goto error_norelse; 47330f712c9SDave Chinner } 47430f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 47530f712c9SDave Chinner } 476a5fd276bSLuis de Bethencourt 47730f712c9SDave Chinner return; 47830f712c9SDave Chinner 47930f712c9SDave Chinner error0: 48030f712c9SDave Chinner xfs_warn(mp, "%s: at error0", __func__); 48130f712c9SDave Chinner if (bp_release) 48230f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 48330f712c9SDave Chinner error_norelse: 48430f712c9SDave Chinner xfs_warn(mp, "%s: BAD after btree leaves for %d extents", 48530f712c9SDave Chinner __func__, i); 48630f712c9SDave Chinner panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); 48730f712c9SDave Chinner return; 48830f712c9SDave Chinner } 48930f712c9SDave Chinner 49030f712c9SDave Chinner /* 49130f712c9SDave Chinner * Validate that the bmbt_irecs being returned from bmapi are valid 49230f712c9SDave Chinner * given the caller's original parameters. Specifically check the 49330f712c9SDave Chinner * ranges of the returned irecs to ensure that they only extend beyond 49430f712c9SDave Chinner * the given parameters if the XFS_BMAPI_ENTIRE flag was set. 49530f712c9SDave Chinner */ 49630f712c9SDave Chinner STATIC void 49730f712c9SDave Chinner xfs_bmap_validate_ret( 49830f712c9SDave Chinner xfs_fileoff_t bno, 49930f712c9SDave Chinner xfs_filblks_t len, 50030f712c9SDave Chinner int flags, 50130f712c9SDave Chinner xfs_bmbt_irec_t *mval, 50230f712c9SDave Chinner int nmap, 50330f712c9SDave Chinner int ret_nmap) 50430f712c9SDave Chinner { 50530f712c9SDave Chinner int i; /* index to map values */ 50630f712c9SDave Chinner 50730f712c9SDave Chinner ASSERT(ret_nmap <= nmap); 50830f712c9SDave Chinner 50930f712c9SDave Chinner for (i = 0; i < ret_nmap; i++) { 51030f712c9SDave Chinner ASSERT(mval[i].br_blockcount > 0); 51130f712c9SDave Chinner if (!(flags & XFS_BMAPI_ENTIRE)) { 51230f712c9SDave Chinner ASSERT(mval[i].br_startoff >= bno); 51330f712c9SDave Chinner ASSERT(mval[i].br_blockcount <= len); 51430f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= 51530f712c9SDave Chinner bno + len); 51630f712c9SDave Chinner } else { 51730f712c9SDave Chinner ASSERT(mval[i].br_startoff < bno + len); 51830f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount > 51930f712c9SDave Chinner bno); 52030f712c9SDave Chinner } 52130f712c9SDave Chinner ASSERT(i == 0 || 52230f712c9SDave Chinner mval[i - 1].br_startoff + mval[i - 1].br_blockcount == 52330f712c9SDave Chinner mval[i].br_startoff); 52430f712c9SDave Chinner ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && 52530f712c9SDave Chinner mval[i].br_startblock != HOLESTARTBLOCK); 52630f712c9SDave Chinner ASSERT(mval[i].br_state == XFS_EXT_NORM || 52730f712c9SDave Chinner mval[i].br_state == XFS_EXT_UNWRITTEN); 52830f712c9SDave Chinner } 52930f712c9SDave Chinner } 53030f712c9SDave Chinner 53130f712c9SDave Chinner #else 53230f712c9SDave Chinner #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) 5337bf7a193SDarrick J. Wong #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) do { } while (0) 53430f712c9SDave Chinner #endif /* DEBUG */ 53530f712c9SDave Chinner 53630f712c9SDave Chinner /* 53730f712c9SDave Chinner * bmap free list manipulation functions 53830f712c9SDave Chinner */ 53930f712c9SDave Chinner 54030f712c9SDave Chinner /* 54130f712c9SDave Chinner * Add the extent to the list of extents to be free at transaction end. 54230f712c9SDave Chinner * The list is maintained sorted (by block number). 54330f712c9SDave Chinner */ 54430f712c9SDave Chinner void 54530f712c9SDave Chinner xfs_bmap_add_free( 546340785ccSDarrick J. Wong struct xfs_mount *mp, 547340785ccSDarrick J. Wong struct xfs_defer_ops *dfops, 548340785ccSDarrick J. Wong xfs_fsblock_t bno, 549340785ccSDarrick J. Wong xfs_filblks_t len, 550340785ccSDarrick J. Wong struct xfs_owner_info *oinfo) 55130f712c9SDave Chinner { 552310a75a3SDarrick J. Wong struct xfs_extent_free_item *new; /* new element */ 55330f712c9SDave Chinner #ifdef DEBUG 55430f712c9SDave Chinner xfs_agnumber_t agno; 55530f712c9SDave Chinner xfs_agblock_t agbno; 55630f712c9SDave Chinner 55730f712c9SDave Chinner ASSERT(bno != NULLFSBLOCK); 55830f712c9SDave Chinner ASSERT(len > 0); 55930f712c9SDave Chinner ASSERT(len <= MAXEXTLEN); 56030f712c9SDave Chinner ASSERT(!isnullstartblock(bno)); 56130f712c9SDave Chinner agno = XFS_FSB_TO_AGNO(mp, bno); 56230f712c9SDave Chinner agbno = XFS_FSB_TO_AGBNO(mp, bno); 56330f712c9SDave Chinner ASSERT(agno < mp->m_sb.sb_agcount); 56430f712c9SDave Chinner ASSERT(agbno < mp->m_sb.sb_agblocks); 56530f712c9SDave Chinner ASSERT(len < mp->m_sb.sb_agblocks); 56630f712c9SDave Chinner ASSERT(agbno + len <= mp->m_sb.sb_agblocks); 56730f712c9SDave Chinner #endif 56830f712c9SDave Chinner ASSERT(xfs_bmap_free_item_zone != NULL); 569340785ccSDarrick J. Wong 57030f712c9SDave Chinner new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); 571310a75a3SDarrick J. Wong new->xefi_startblock = bno; 572310a75a3SDarrick J. Wong new->xefi_blockcount = (xfs_extlen_t)len; 573340785ccSDarrick J. Wong if (oinfo) 574340785ccSDarrick J. Wong new->xefi_oinfo = *oinfo; 575340785ccSDarrick J. Wong else 576340785ccSDarrick J. Wong xfs_rmap_skip_owner_update(&new->xefi_oinfo); 577ba9e7802SDarrick J. Wong trace_xfs_bmap_free_defer(mp, XFS_FSB_TO_AGNO(mp, bno), 0, 578ba9e7802SDarrick J. Wong XFS_FSB_TO_AGBNO(mp, bno), len); 5792c3234d1SDarrick J. Wong xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_FREE, &new->xefi_list); 58030f712c9SDave Chinner } 58130f712c9SDave Chinner 58230f712c9SDave Chinner /* 58330f712c9SDave Chinner * Inode fork format manipulation functions 58430f712c9SDave Chinner */ 58530f712c9SDave Chinner 58630f712c9SDave Chinner /* 58730f712c9SDave Chinner * Transform a btree format file with only one leaf node, where the 58830f712c9SDave Chinner * extents list will fit in the inode, into an extents format file. 58930f712c9SDave Chinner * Since the file extents are already in-core, all we have to do is 59030f712c9SDave Chinner * give up the space for the btree root and pitch the leaf block. 59130f712c9SDave Chinner */ 59230f712c9SDave Chinner STATIC int /* error */ 59330f712c9SDave Chinner xfs_bmap_btree_to_extents( 59430f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 59530f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 59630f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor */ 59730f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 59830f712c9SDave Chinner int whichfork) /* data or attr fork */ 59930f712c9SDave Chinner { 60030f712c9SDave Chinner /* REFERENCED */ 60130f712c9SDave Chinner struct xfs_btree_block *cblock;/* child btree block */ 60230f712c9SDave Chinner xfs_fsblock_t cbno; /* child block number */ 60330f712c9SDave Chinner xfs_buf_t *cbp; /* child block's buffer */ 60430f712c9SDave Chinner int error; /* error return value */ 60530f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork data */ 60630f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 60730f712c9SDave Chinner __be64 *pp; /* ptr to block address */ 60830f712c9SDave Chinner struct xfs_btree_block *rblock;/* root btree block */ 609340785ccSDarrick J. Wong struct xfs_owner_info oinfo; 61030f712c9SDave Chinner 61130f712c9SDave Chinner mp = ip->i_mount; 61230f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 61360b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 61430f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 61530f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); 61630f712c9SDave Chinner rblock = ifp->if_broot; 61730f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_level) == 1); 61830f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); 61930f712c9SDave Chinner ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); 62030f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); 62130f712c9SDave Chinner cbno = be64_to_cpu(*pp); 62230f712c9SDave Chinner *logflagsp = 0; 62330f712c9SDave Chinner #ifdef DEBUG 624f135761aSDarrick J. Wong XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, 625f135761aSDarrick J. Wong xfs_btree_check_lptr(cur, cbno, 1)); 62630f712c9SDave Chinner #endif 62730f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, 62830f712c9SDave Chinner &xfs_bmbt_buf_ops); 62930f712c9SDave Chinner if (error) 63030f712c9SDave Chinner return error; 63130f712c9SDave Chinner cblock = XFS_BUF_TO_BLOCK(cbp); 63230f712c9SDave Chinner if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) 63330f712c9SDave Chinner return error; 634340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork); 635340785ccSDarrick J. Wong xfs_bmap_add_free(mp, cur->bc_private.b.dfops, cbno, 1, &oinfo); 63630f712c9SDave Chinner ip->i_d.di_nblocks--; 63730f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); 63830f712c9SDave Chinner xfs_trans_binval(tp, cbp); 63930f712c9SDave Chinner if (cur->bc_bufs[0] == cbp) 64030f712c9SDave Chinner cur->bc_bufs[0] = NULL; 64130f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 64230f712c9SDave Chinner ASSERT(ifp->if_broot == NULL); 64330f712c9SDave Chinner ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); 64430f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); 64530f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 64630f712c9SDave Chinner return 0; 64730f712c9SDave Chinner } 64830f712c9SDave Chinner 64930f712c9SDave Chinner /* 65030f712c9SDave Chinner * Convert an extents-format file into a btree-format file. 65130f712c9SDave Chinner * The new file will have a root block (in the inode) and a single child block. 65230f712c9SDave Chinner */ 65330f712c9SDave Chinner STATIC int /* error */ 65430f712c9SDave Chinner xfs_bmap_extents_to_btree( 65530f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 65630f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 65730f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first-block-allocated */ 6582c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks freed in xaction */ 65930f712c9SDave Chinner xfs_btree_cur_t **curp, /* cursor returned to caller */ 66030f712c9SDave Chinner int wasdel, /* converting a delayed alloc */ 66130f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 66230f712c9SDave Chinner int whichfork) /* data or attr fork */ 66330f712c9SDave Chinner { 66430f712c9SDave Chinner struct xfs_btree_block *ablock; /* allocated (child) bt block */ 66530f712c9SDave Chinner xfs_buf_t *abp; /* buffer for ablock */ 66630f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 66730f712c9SDave Chinner xfs_bmbt_rec_t *arp; /* child record pointer */ 66830f712c9SDave Chinner struct xfs_btree_block *block; /* btree root block */ 66930f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 67030f712c9SDave Chinner int error; /* error return value */ 67130f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 67230f712c9SDave Chinner xfs_bmbt_key_t *kp; /* root block key pointer */ 67330f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 67430f712c9SDave Chinner xfs_bmbt_ptr_t *pp; /* root block address pointer */ 675b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 676906abed5SChristoph Hellwig struct xfs_bmbt_irec rec; 677b2b1712aSChristoph Hellwig xfs_extnum_t cnt = 0; 67830f712c9SDave Chinner 67930f712c9SDave Chinner mp = ip->i_mount; 68060b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 68130f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 68230f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); 68330f712c9SDave Chinner 68430f712c9SDave Chinner /* 68530f712c9SDave Chinner * Make space in the inode incore. 68630f712c9SDave Chinner */ 68730f712c9SDave Chinner xfs_iroot_realloc(ip, 1, whichfork); 68830f712c9SDave Chinner ifp->if_flags |= XFS_IFBROOT; 68930f712c9SDave Chinner 69030f712c9SDave Chinner /* 69130f712c9SDave Chinner * Fill in the root. 69230f712c9SDave Chinner */ 69330f712c9SDave Chinner block = ifp->if_broot; 69430f712c9SDave Chinner xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, 695b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 1, 1, ip->i_ino, 696f88ae46bSEric Sandeen XFS_BTREE_LONG_PTRS); 69730f712c9SDave Chinner /* 69830f712c9SDave Chinner * Need a cursor. Can't allocate until bb_level is filled in. 69930f712c9SDave Chinner */ 70030f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 70130f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 7022c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 70330f712c9SDave Chinner cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; 70430f712c9SDave Chinner /* 70530f712c9SDave Chinner * Convert to a btree with two levels, one record in root. 70630f712c9SDave Chinner */ 70730f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); 70830f712c9SDave Chinner memset(&args, 0, sizeof(args)); 70930f712c9SDave Chinner args.tp = tp; 71030f712c9SDave Chinner args.mp = mp; 711340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); 71230f712c9SDave Chinner args.firstblock = *firstblock; 71330f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 71430f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 71530f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); 7162c3234d1SDarrick J. Wong } else if (dfops->dop_low) { 71730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 71830f712c9SDave Chinner args.fsbno = *firstblock; 71930f712c9SDave Chinner } else { 72030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 72130f712c9SDave Chinner args.fsbno = *firstblock; 72230f712c9SDave Chinner } 72330f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 72430f712c9SDave Chinner args.wasdel = wasdel; 72530f712c9SDave Chinner *logflagsp = 0; 72630f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) { 72730f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 72830f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 72930f712c9SDave Chinner return error; 73030f712c9SDave Chinner } 73190e2056dSDarrick J. Wong 7322fcc319dSChristoph Hellwig if (WARN_ON_ONCE(args.fsbno == NULLFSBLOCK)) { 7332fcc319dSChristoph Hellwig xfs_iroot_realloc(ip, -1, whichfork); 7342fcc319dSChristoph Hellwig xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 7352fcc319dSChristoph Hellwig return -ENOSPC; 7362fcc319dSChristoph Hellwig } 73730f712c9SDave Chinner /* 73830f712c9SDave Chinner * Allocation can't fail, the space was reserved. 73930f712c9SDave Chinner */ 74030f712c9SDave Chinner ASSERT(*firstblock == NULLFSBLOCK || 741410d17f6SChristoph Hellwig args.agno >= XFS_FSB_TO_AGNO(mp, *firstblock)); 74230f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock = args.fsbno; 74330f712c9SDave Chinner cur->bc_private.b.allocated++; 74430f712c9SDave Chinner ip->i_d.di_nblocks++; 74530f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); 74630f712c9SDave Chinner abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); 74730f712c9SDave Chinner /* 74830f712c9SDave Chinner * Fill in the child block. 74930f712c9SDave Chinner */ 75030f712c9SDave Chinner abp->b_ops = &xfs_bmbt_buf_ops; 75130f712c9SDave Chinner ablock = XFS_BUF_TO_BLOCK(abp); 75230f712c9SDave Chinner xfs_btree_init_block_int(mp, ablock, abp->b_bn, 753b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 0, 0, ip->i_ino, 75430f712c9SDave Chinner XFS_BTREE_LONG_PTRS); 75530f712c9SDave Chinner 756b2b1712aSChristoph Hellwig for_each_xfs_iext(ifp, &icur, &rec) { 757906abed5SChristoph Hellwig if (isnullstartblock(rec.br_startblock)) 758906abed5SChristoph Hellwig continue; 759906abed5SChristoph Hellwig arp = XFS_BMBT_REC_ADDR(mp, ablock, 1 + cnt); 760906abed5SChristoph Hellwig xfs_bmbt_disk_set_all(arp, &rec); 761906abed5SChristoph Hellwig cnt++; 76230f712c9SDave Chinner } 76330f712c9SDave Chinner ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); 76430f712c9SDave Chinner xfs_btree_set_numrecs(ablock, cnt); 76530f712c9SDave Chinner 76630f712c9SDave Chinner /* 76730f712c9SDave Chinner * Fill in the root key and pointer. 76830f712c9SDave Chinner */ 76930f712c9SDave Chinner kp = XFS_BMBT_KEY_ADDR(mp, block, 1); 77030f712c9SDave Chinner arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); 77130f712c9SDave Chinner kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); 77230f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, 77330f712c9SDave Chinner be16_to_cpu(block->bb_level))); 77430f712c9SDave Chinner *pp = cpu_to_be64(args.fsbno); 77530f712c9SDave Chinner 77630f712c9SDave Chinner /* 77730f712c9SDave Chinner * Do all this logging at the end so that 77830f712c9SDave Chinner * the root is at the right level. 77930f712c9SDave Chinner */ 78030f712c9SDave Chinner xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); 78130f712c9SDave Chinner xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); 78230f712c9SDave Chinner ASSERT(*curp == NULL); 78330f712c9SDave Chinner *curp = cur; 78430f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); 78530f712c9SDave Chinner return 0; 78630f712c9SDave Chinner } 78730f712c9SDave Chinner 78830f712c9SDave Chinner /* 78930f712c9SDave Chinner * Convert a local file to an extents file. 79030f712c9SDave Chinner * This code is out of bounds for data forks of regular files, 79130f712c9SDave Chinner * since the file data needs to get logged so things will stay consistent. 79230f712c9SDave Chinner * (The bmap-level manipulations are ok, though). 79330f712c9SDave Chinner */ 79430f712c9SDave Chinner void 79530f712c9SDave Chinner xfs_bmap_local_to_extents_empty( 79630f712c9SDave Chinner struct xfs_inode *ip, 79730f712c9SDave Chinner int whichfork) 79830f712c9SDave Chinner { 79930f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 80030f712c9SDave Chinner 80160b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 80230f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 80330f712c9SDave Chinner ASSERT(ifp->if_bytes == 0); 80430f712c9SDave Chinner ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); 80530f712c9SDave Chinner 80630f712c9SDave Chinner xfs_bmap_forkoff_reset(ip, whichfork); 80730f712c9SDave Chinner ifp->if_flags &= ~XFS_IFINLINE; 80830f712c9SDave Chinner ifp->if_flags |= XFS_IFEXTENTS; 8096bdcf26aSChristoph Hellwig ifp->if_u1.if_root = NULL; 8106bdcf26aSChristoph Hellwig ifp->if_height = 0; 81130f712c9SDave Chinner XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); 81230f712c9SDave Chinner } 81330f712c9SDave Chinner 81430f712c9SDave Chinner 81530f712c9SDave Chinner STATIC int /* error */ 81630f712c9SDave Chinner xfs_bmap_local_to_extents( 81730f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 81830f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 81930f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated in xaction */ 82030f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed by transaction */ 82130f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 82230f712c9SDave Chinner int whichfork, 82330f712c9SDave Chinner void (*init_fn)(struct xfs_trans *tp, 82430f712c9SDave Chinner struct xfs_buf *bp, 82530f712c9SDave Chinner struct xfs_inode *ip, 82630f712c9SDave Chinner struct xfs_ifork *ifp)) 82730f712c9SDave Chinner { 82830f712c9SDave Chinner int error = 0; 82930f712c9SDave Chinner int flags; /* logging flags returned */ 83030f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 83130f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 83230f712c9SDave Chinner xfs_buf_t *bp; /* buffer for extent block */ 83350bb44c2SChristoph Hellwig struct xfs_bmbt_irec rec; 834b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 83530f712c9SDave Chinner 83630f712c9SDave Chinner /* 83730f712c9SDave Chinner * We don't want to deal with the case of keeping inode data inline yet. 83830f712c9SDave Chinner * So sending the data fork of a regular inode is invalid. 83930f712c9SDave Chinner */ 840c19b3b05SDave Chinner ASSERT(!(S_ISREG(VFS_I(ip)->i_mode) && whichfork == XFS_DATA_FORK)); 84130f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 84230f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 84330f712c9SDave Chinner 84430f712c9SDave Chinner if (!ifp->if_bytes) { 84530f712c9SDave Chinner xfs_bmap_local_to_extents_empty(ip, whichfork); 84630f712c9SDave Chinner flags = XFS_ILOG_CORE; 84730f712c9SDave Chinner goto done; 84830f712c9SDave Chinner } 84930f712c9SDave Chinner 85030f712c9SDave Chinner flags = 0; 85130f712c9SDave Chinner error = 0; 8526bdcf26aSChristoph Hellwig ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS)) == XFS_IFINLINE); 85330f712c9SDave Chinner memset(&args, 0, sizeof(args)); 85430f712c9SDave Chinner args.tp = tp; 85530f712c9SDave Chinner args.mp = ip->i_mount; 856340785ccSDarrick J. Wong xfs_rmap_ino_owner(&args.oinfo, ip->i_ino, whichfork, 0); 85730f712c9SDave Chinner args.firstblock = *firstblock; 85830f712c9SDave Chinner /* 85930f712c9SDave Chinner * Allocate a block. We know we need only one, since the 86030f712c9SDave Chinner * file currently fits in an inode. 86130f712c9SDave Chinner */ 86230f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 86330f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); 86430f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 86530f712c9SDave Chinner } else { 86630f712c9SDave Chinner args.fsbno = *firstblock; 86730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 86830f712c9SDave Chinner } 86930f712c9SDave Chinner args.total = total; 87030f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 87130f712c9SDave Chinner error = xfs_alloc_vextent(&args); 87230f712c9SDave Chinner if (error) 87330f712c9SDave Chinner goto done; 87430f712c9SDave Chinner 87530f712c9SDave Chinner /* Can't fail, the space was reserved. */ 87630f712c9SDave Chinner ASSERT(args.fsbno != NULLFSBLOCK); 87730f712c9SDave Chinner ASSERT(args.len == 1); 87830f712c9SDave Chinner *firstblock = args.fsbno; 87930f712c9SDave Chinner bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); 88030f712c9SDave Chinner 881fe22d552SDave Chinner /* 882b7cdc66bSBrian Foster * Initialize the block, copy the data and log the remote buffer. 883fe22d552SDave Chinner * 884b7cdc66bSBrian Foster * The callout is responsible for logging because the remote format 885b7cdc66bSBrian Foster * might differ from the local format and thus we don't know how much to 886b7cdc66bSBrian Foster * log here. Note that init_fn must also set the buffer log item type 887b7cdc66bSBrian Foster * correctly. 888fe22d552SDave Chinner */ 88930f712c9SDave Chinner init_fn(tp, bp, ip, ifp); 89030f712c9SDave Chinner 891b7cdc66bSBrian Foster /* account for the change in fork size */ 89230f712c9SDave Chinner xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); 89330f712c9SDave Chinner xfs_bmap_local_to_extents_empty(ip, whichfork); 89430f712c9SDave Chinner flags |= XFS_ILOG_CORE; 89530f712c9SDave Chinner 8966bdcf26aSChristoph Hellwig ifp->if_u1.if_root = NULL; 8976bdcf26aSChristoph Hellwig ifp->if_height = 0; 8986bdcf26aSChristoph Hellwig 89950bb44c2SChristoph Hellwig rec.br_startoff = 0; 90050bb44c2SChristoph Hellwig rec.br_startblock = args.fsbno; 90150bb44c2SChristoph Hellwig rec.br_blockcount = 1; 90250bb44c2SChristoph Hellwig rec.br_state = XFS_EXT_NORM; 903b2b1712aSChristoph Hellwig xfs_iext_first(ifp, &icur); 9040254c2f2SChristoph Hellwig xfs_iext_insert(ip, &icur, &rec, 0); 90550bb44c2SChristoph Hellwig 90630f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 1); 90730f712c9SDave Chinner ip->i_d.di_nblocks = 1; 90830f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, 90930f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 1L); 91030f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 91130f712c9SDave Chinner 91230f712c9SDave Chinner done: 91330f712c9SDave Chinner *logflagsp = flags; 91430f712c9SDave Chinner return error; 91530f712c9SDave Chinner } 91630f712c9SDave Chinner 91730f712c9SDave Chinner /* 91830f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle btree format files. 91930f712c9SDave Chinner */ 92030f712c9SDave Chinner STATIC int /* error */ 92130f712c9SDave Chinner xfs_bmap_add_attrfork_btree( 92230f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 92330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 92430f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 9252c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 92630f712c9SDave Chinner int *flags) /* inode logging flags */ 92730f712c9SDave Chinner { 92830f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 92930f712c9SDave Chinner int error; /* error return value */ 93030f712c9SDave Chinner xfs_mount_t *mp; /* file system mount struct */ 93130f712c9SDave Chinner int stat; /* newroot status */ 93230f712c9SDave Chinner 93330f712c9SDave Chinner mp = ip->i_mount; 93430f712c9SDave Chinner if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) 93530f712c9SDave Chinner *flags |= XFS_ILOG_DBROOT; 93630f712c9SDave Chinner else { 93730f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); 9382c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 93930f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 940b5cfbc22SChristoph Hellwig error = xfs_bmbt_lookup_first(cur, &stat); 941b5cfbc22SChristoph Hellwig if (error) 94230f712c9SDave Chinner goto error0; 94330f712c9SDave Chinner /* must be at least one entry */ 944c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, stat == 1, error0); 94530f712c9SDave Chinner if ((error = xfs_btree_new_iroot(cur, flags, &stat))) 94630f712c9SDave Chinner goto error0; 94730f712c9SDave Chinner if (stat == 0) { 94830f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 9492451337dSDave Chinner return -ENOSPC; 95030f712c9SDave Chinner } 95130f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock; 95230f712c9SDave Chinner cur->bc_private.b.allocated = 0; 95330f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 95430f712c9SDave Chinner } 95530f712c9SDave Chinner return 0; 95630f712c9SDave Chinner error0: 95730f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 95830f712c9SDave Chinner return error; 95930f712c9SDave Chinner } 96030f712c9SDave Chinner 96130f712c9SDave Chinner /* 96230f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle extents format files. 96330f712c9SDave Chinner */ 96430f712c9SDave Chinner STATIC int /* error */ 96530f712c9SDave Chinner xfs_bmap_add_attrfork_extents( 96630f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 96730f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 96830f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 9692c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 97030f712c9SDave Chinner int *flags) /* inode logging flags */ 97130f712c9SDave Chinner { 97230f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 97330f712c9SDave Chinner int error; /* error return value */ 97430f712c9SDave Chinner 97530f712c9SDave Chinner if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) 97630f712c9SDave Chinner return 0; 97730f712c9SDave Chinner cur = NULL; 9782c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, &cur, 0, 97930f712c9SDave Chinner flags, XFS_DATA_FORK); 98030f712c9SDave Chinner if (cur) { 98130f712c9SDave Chinner cur->bc_private.b.allocated = 0; 98230f712c9SDave Chinner xfs_btree_del_cursor(cur, 98330f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 98430f712c9SDave Chinner } 98530f712c9SDave Chinner return error; 98630f712c9SDave Chinner } 98730f712c9SDave Chinner 98830f712c9SDave Chinner /* 98930f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle local format files. Each 99030f712c9SDave Chinner * different data fork content type needs a different callout to do the 99130f712c9SDave Chinner * conversion. Some are basic and only require special block initialisation 99230f712c9SDave Chinner * callouts for the data formating, others (directories) are so specialised they 99330f712c9SDave Chinner * handle everything themselves. 99430f712c9SDave Chinner * 99530f712c9SDave Chinner * XXX (dgc): investigate whether directory conversion can use the generic 99630f712c9SDave Chinner * formatting callout. It should be possible - it's just a very complex 99730f712c9SDave Chinner * formatter. 99830f712c9SDave Chinner */ 99930f712c9SDave Chinner STATIC int /* error */ 100030f712c9SDave Chinner xfs_bmap_add_attrfork_local( 100130f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 100230f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 100330f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first block allocated */ 10042c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* blocks to free at commit */ 100530f712c9SDave Chinner int *flags) /* inode logging flags */ 100630f712c9SDave Chinner { 100730f712c9SDave Chinner xfs_da_args_t dargs; /* args for dir/attr code */ 100830f712c9SDave Chinner 100930f712c9SDave Chinner if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) 101030f712c9SDave Chinner return 0; 101130f712c9SDave Chinner 1012c19b3b05SDave Chinner if (S_ISDIR(VFS_I(ip)->i_mode)) { 101330f712c9SDave Chinner memset(&dargs, 0, sizeof(dargs)); 101430f712c9SDave Chinner dargs.geo = ip->i_mount->m_dir_geo; 101530f712c9SDave Chinner dargs.dp = ip; 101630f712c9SDave Chinner dargs.firstblock = firstblock; 10172c3234d1SDarrick J. Wong dargs.dfops = dfops; 101830f712c9SDave Chinner dargs.total = dargs.geo->fsbcount; 101930f712c9SDave Chinner dargs.whichfork = XFS_DATA_FORK; 102030f712c9SDave Chinner dargs.trans = tp; 102130f712c9SDave Chinner return xfs_dir2_sf_to_block(&dargs); 102230f712c9SDave Chinner } 102330f712c9SDave Chinner 1024c19b3b05SDave Chinner if (S_ISLNK(VFS_I(ip)->i_mode)) 102530f712c9SDave Chinner return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, 102630f712c9SDave Chinner flags, XFS_DATA_FORK, 102730f712c9SDave Chinner xfs_symlink_local_to_remote); 102830f712c9SDave Chinner 102930f712c9SDave Chinner /* should only be called for types that support local format data */ 103030f712c9SDave Chinner ASSERT(0); 10312451337dSDave Chinner return -EFSCORRUPTED; 103230f712c9SDave Chinner } 103330f712c9SDave Chinner 103430f712c9SDave Chinner /* 103530f712c9SDave Chinner * Convert inode from non-attributed to attributed. 103630f712c9SDave Chinner * Must not be in a transaction, ip must not be locked. 103730f712c9SDave Chinner */ 103830f712c9SDave Chinner int /* error code */ 103930f712c9SDave Chinner xfs_bmap_add_attrfork( 104030f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 104130f712c9SDave Chinner int size, /* space new attribute needs */ 104230f712c9SDave Chinner int rsvd) /* xact may use reserved blks */ 104330f712c9SDave Chinner { 104430f712c9SDave Chinner xfs_fsblock_t firstblock; /* 1st block/ag allocated */ 10452c3234d1SDarrick J. Wong struct xfs_defer_ops dfops; /* freed extent records */ 104630f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 104730f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 104830f712c9SDave Chinner int blks; /* space reservation */ 104930f712c9SDave Chinner int version = 1; /* superblock attr version */ 105030f712c9SDave Chinner int logflags; /* logging flags */ 105130f712c9SDave Chinner int error; /* error return value */ 105230f712c9SDave Chinner 105330f712c9SDave Chinner ASSERT(XFS_IFORK_Q(ip) == 0); 105430f712c9SDave Chinner 105530f712c9SDave Chinner mp = ip->i_mount; 105630f712c9SDave Chinner ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); 1057253f4911SChristoph Hellwig 105830f712c9SDave Chinner blks = XFS_ADDAFORK_SPACE_RES(mp); 1059253f4911SChristoph Hellwig 1060253f4911SChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_addafork, blks, 0, 1061253f4911SChristoph Hellwig rsvd ? XFS_TRANS_RESERVE : 0, &tp); 1062253f4911SChristoph Hellwig if (error) 106330f712c9SDave Chinner return error; 1064253f4911SChristoph Hellwig 106530f712c9SDave Chinner xfs_ilock(ip, XFS_ILOCK_EXCL); 106630f712c9SDave Chinner error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? 106730f712c9SDave Chinner XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : 106830f712c9SDave Chinner XFS_QMOPT_RES_REGBLKS); 106930f712c9SDave Chinner if (error) 107030f712c9SDave Chinner goto trans_cancel; 107130f712c9SDave Chinner if (XFS_IFORK_Q(ip)) 107230f712c9SDave Chinner goto trans_cancel; 10730f352f8eSDarrick J. Wong if (ip->i_d.di_anextents != 0) { 10740f352f8eSDarrick J. Wong error = -EFSCORRUPTED; 10750f352f8eSDarrick J. Wong goto trans_cancel; 10760f352f8eSDarrick J. Wong } 107730f712c9SDave Chinner if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { 107830f712c9SDave Chinner /* 107930f712c9SDave Chinner * For inodes coming from pre-6.2 filesystems. 108030f712c9SDave Chinner */ 108130f712c9SDave Chinner ASSERT(ip->i_d.di_aformat == 0); 108230f712c9SDave Chinner ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; 108330f712c9SDave Chinner } 108430f712c9SDave Chinner 108530f712c9SDave Chinner xfs_trans_ijoin(tp, ip, 0); 108630f712c9SDave Chinner xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 108730f712c9SDave Chinner 108830f712c9SDave Chinner switch (ip->i_d.di_format) { 108930f712c9SDave Chinner case XFS_DINODE_FMT_DEV: 109030f712c9SDave Chinner ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; 109130f712c9SDave Chinner break; 109230f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 109330f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 109430f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 109530f712c9SDave Chinner ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); 109630f712c9SDave Chinner if (!ip->i_d.di_forkoff) 109730f712c9SDave Chinner ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; 109830f712c9SDave Chinner else if (mp->m_flags & XFS_MOUNT_ATTR2) 109930f712c9SDave Chinner version = 2; 110030f712c9SDave Chinner break; 110130f712c9SDave Chinner default: 110230f712c9SDave Chinner ASSERT(0); 11032451337dSDave Chinner error = -EINVAL; 110430f712c9SDave Chinner goto trans_cancel; 110530f712c9SDave Chinner } 110630f712c9SDave Chinner 110730f712c9SDave Chinner ASSERT(ip->i_afp == NULL); 110830f712c9SDave Chinner ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); 110930f712c9SDave Chinner ip->i_afp->if_flags = XFS_IFEXTENTS; 111030f712c9SDave Chinner logflags = 0; 11112c3234d1SDarrick J. Wong xfs_defer_init(&dfops, &firstblock); 111230f712c9SDave Chinner switch (ip->i_d.di_format) { 111330f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 11142c3234d1SDarrick J. Wong error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &dfops, 111530f712c9SDave Chinner &logflags); 111630f712c9SDave Chinner break; 111730f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 111830f712c9SDave Chinner error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, 11192c3234d1SDarrick J. Wong &dfops, &logflags); 112030f712c9SDave Chinner break; 112130f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 11222c3234d1SDarrick J. Wong error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &dfops, 112330f712c9SDave Chinner &logflags); 112430f712c9SDave Chinner break; 112530f712c9SDave Chinner default: 112630f712c9SDave Chinner error = 0; 112730f712c9SDave Chinner break; 112830f712c9SDave Chinner } 112930f712c9SDave Chinner if (logflags) 113030f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 113130f712c9SDave Chinner if (error) 113230f712c9SDave Chinner goto bmap_cancel; 113330f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb) || 113430f712c9SDave Chinner (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { 113561e63ecbSDave Chinner bool log_sb = false; 113630f712c9SDave Chinner 113730f712c9SDave Chinner spin_lock(&mp->m_sb_lock); 113830f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb)) { 113930f712c9SDave Chinner xfs_sb_version_addattr(&mp->m_sb); 114061e63ecbSDave Chinner log_sb = true; 114130f712c9SDave Chinner } 114230f712c9SDave Chinner if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { 114330f712c9SDave Chinner xfs_sb_version_addattr2(&mp->m_sb); 114461e63ecbSDave Chinner log_sb = true; 114530f712c9SDave Chinner } 114630f712c9SDave Chinner spin_unlock(&mp->m_sb_lock); 114761e63ecbSDave Chinner if (log_sb) 114861e63ecbSDave Chinner xfs_log_sb(tp); 114930f712c9SDave Chinner } 115030f712c9SDave Chinner 11518ad7c629SChristoph Hellwig error = xfs_defer_finish(&tp, &dfops); 115230f712c9SDave Chinner if (error) 115330f712c9SDave Chinner goto bmap_cancel; 115470393313SChristoph Hellwig error = xfs_trans_commit(tp); 115530f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 115630f712c9SDave Chinner return error; 115730f712c9SDave Chinner 115830f712c9SDave Chinner bmap_cancel: 11592c3234d1SDarrick J. Wong xfs_defer_cancel(&dfops); 116030f712c9SDave Chinner trans_cancel: 11614906e215SChristoph Hellwig xfs_trans_cancel(tp); 116230f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 116330f712c9SDave Chinner return error; 116430f712c9SDave Chinner } 116530f712c9SDave Chinner 116630f712c9SDave Chinner /* 116730f712c9SDave Chinner * Internal and external extent tree search functions. 116830f712c9SDave Chinner */ 116930f712c9SDave Chinner 117030f712c9SDave Chinner /* 1171211e95bbSChristoph Hellwig * Read in extents from a btree-format inode. 117230f712c9SDave Chinner */ 1173211e95bbSChristoph Hellwig int 1174211e95bbSChristoph Hellwig xfs_iread_extents( 1175211e95bbSChristoph Hellwig struct xfs_trans *tp, 1176211e95bbSChristoph Hellwig struct xfs_inode *ip, 1177211e95bbSChristoph Hellwig int whichfork) 117830f712c9SDave Chinner { 1179211e95bbSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 1180e8e0e170SChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 1181211e95bbSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 1182211e95bbSChristoph Hellwig xfs_extnum_t nextents = XFS_IFORK_NEXTENTS(ip, whichfork); 1183211e95bbSChristoph Hellwig struct xfs_btree_block *block = ifp->if_broot; 1184b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 11856bdcf26aSChristoph Hellwig struct xfs_bmbt_irec new; 1186211e95bbSChristoph Hellwig xfs_fsblock_t bno; 1187211e95bbSChristoph Hellwig struct xfs_buf *bp; 1188211e95bbSChristoph Hellwig xfs_extnum_t i, j; 1189211e95bbSChristoph Hellwig int level; 1190211e95bbSChristoph Hellwig __be64 *pp; 1191211e95bbSChristoph Hellwig int error; 119230f712c9SDave Chinner 1193211e95bbSChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 1194211e95bbSChristoph Hellwig 1195211e95bbSChristoph Hellwig if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { 1196211e95bbSChristoph Hellwig XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp); 1197211e95bbSChristoph Hellwig return -EFSCORRUPTED; 1198211e95bbSChristoph Hellwig } 1199211e95bbSChristoph Hellwig 120030f712c9SDave Chinner /* 120130f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 120230f712c9SDave Chinner */ 120330f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 120430f712c9SDave Chinner ASSERT(level > 0); 120530f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 120630f712c9SDave Chinner bno = be64_to_cpu(*pp); 1207d5a91baeSDarrick J. Wong 120830f712c9SDave Chinner /* 120930f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 121030f712c9SDave Chinner * pointer (leftmost) at each level. 121130f712c9SDave Chinner */ 121230f712c9SDave Chinner while (level-- > 0) { 121330f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, 121430f712c9SDave Chinner XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); 121530f712c9SDave Chinner if (error) 1216211e95bbSChristoph Hellwig goto out; 121730f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 121830f712c9SDave Chinner if (level == 0) 121930f712c9SDave Chinner break; 122030f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 122130f712c9SDave Chinner bno = be64_to_cpu(*pp); 1222c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, 1223211e95bbSChristoph Hellwig XFS_FSB_SANITY_CHECK(mp, bno), out_brelse); 122430f712c9SDave Chinner xfs_trans_brelse(tp, bp); 122530f712c9SDave Chinner } 1226211e95bbSChristoph Hellwig 122730f712c9SDave Chinner /* 122830f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 122930f712c9SDave Chinner */ 123030f712c9SDave Chinner i = 0; 1231b2b1712aSChristoph Hellwig xfs_iext_first(ifp, &icur); 1232211e95bbSChristoph Hellwig 123330f712c9SDave Chinner /* 123430f712c9SDave Chinner * Loop over all leaf nodes. Copy information to the extent records. 123530f712c9SDave Chinner */ 123630f712c9SDave Chinner for (;;) { 123730f712c9SDave Chinner xfs_bmbt_rec_t *frp; 123830f712c9SDave Chinner xfs_fsblock_t nextbno; 123930f712c9SDave Chinner xfs_extnum_t num_recs; 124030f712c9SDave Chinner 124130f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 1242211e95bbSChristoph Hellwig if (unlikely(i + num_recs > nextents)) { 1243211e95bbSChristoph Hellwig ASSERT(i + num_recs <= nextents); 124430f712c9SDave Chinner xfs_warn(ip->i_mount, 124530f712c9SDave Chinner "corrupt dinode %Lu, (btree extents).", 124630f712c9SDave Chinner (unsigned long long) ip->i_ino); 1247211e95bbSChristoph Hellwig XFS_CORRUPTION_ERROR(__func__, 124830f712c9SDave Chinner XFS_ERRLEVEL_LOW, ip->i_mount, block); 1249211e95bbSChristoph Hellwig error = -EFSCORRUPTED; 1250211e95bbSChristoph Hellwig goto out_brelse; 125130f712c9SDave Chinner } 125230f712c9SDave Chinner /* 125330f712c9SDave Chinner * Read-ahead the next leaf block, if any. 125430f712c9SDave Chinner */ 125530f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 125630f712c9SDave Chinner if (nextbno != NULLFSBLOCK) 125730f712c9SDave Chinner xfs_btree_reada_bufl(mp, nextbno, 1, 125830f712c9SDave Chinner &xfs_bmbt_buf_ops); 125930f712c9SDave Chinner /* 126030f712c9SDave Chinner * Copy records into the extent records. 126130f712c9SDave Chinner */ 126230f712c9SDave Chinner frp = XFS_BMBT_REC_ADDR(mp, block, 1); 12636bdcf26aSChristoph Hellwig for (j = 0; j < num_recs; j++, frp++, i++) { 1264dac9c9b1SChristoph Hellwig xfs_bmbt_disk_get_all(frp, &new); 1265dac9c9b1SChristoph Hellwig if (!xfs_bmbt_validate_extent(mp, whichfork, &new)) { 126630f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", 12670c1d9e4aSChristoph Hellwig XFS_ERRLEVEL_LOW, mp); 1268211e95bbSChristoph Hellwig error = -EFSCORRUPTED; 1269211e95bbSChristoph Hellwig goto out_brelse; 127030f712c9SDave Chinner } 12710254c2f2SChristoph Hellwig xfs_iext_insert(ip, &icur, &new, state); 1272b2b1712aSChristoph Hellwig trace_xfs_read_extent(ip, &icur, state, _THIS_IP_); 1273b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &icur); 127430f712c9SDave Chinner } 127530f712c9SDave Chinner xfs_trans_brelse(tp, bp); 127630f712c9SDave Chinner bno = nextbno; 127730f712c9SDave Chinner /* 127830f712c9SDave Chinner * If we've reached the end, stop. 127930f712c9SDave Chinner */ 128030f712c9SDave Chinner if (bno == NULLFSBLOCK) 128130f712c9SDave Chinner break; 128230f712c9SDave Chinner error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, 128330f712c9SDave Chinner XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); 128430f712c9SDave Chinner if (error) 1285211e95bbSChristoph Hellwig goto out; 128630f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 128730f712c9SDave Chinner } 1288211e95bbSChristoph Hellwig 1289211e95bbSChristoph Hellwig if (i != XFS_IFORK_NEXTENTS(ip, whichfork)) { 1290211e95bbSChristoph Hellwig error = -EFSCORRUPTED; 1291211e95bbSChristoph Hellwig goto out; 1292211e95bbSChristoph Hellwig } 12935d829300SEric Sandeen ASSERT(i == xfs_iext_count(ifp)); 1294211e95bbSChristoph Hellwig 1295211e95bbSChristoph Hellwig ifp->if_flags |= XFS_IFEXTENTS; 129630f712c9SDave Chinner return 0; 1297211e95bbSChristoph Hellwig 1298211e95bbSChristoph Hellwig out_brelse: 129930f712c9SDave Chinner xfs_trans_brelse(tp, bp); 1300211e95bbSChristoph Hellwig out: 1301211e95bbSChristoph Hellwig xfs_iext_destroy(ifp); 1302211e95bbSChristoph Hellwig return error; 130330f712c9SDave Chinner } 130430f712c9SDave Chinner 130530f712c9SDave Chinner /* 130629b3e94aSChristoph Hellwig * Returns the relative block number of the first unused block(s) in the given 130729b3e94aSChristoph Hellwig * fork with at least "len" logically contiguous blocks free. This is the 130829b3e94aSChristoph Hellwig * lowest-address hole if the fork has holes, else the first block past the end 130929b3e94aSChristoph Hellwig * of fork. Return 0 if the fork is currently local (in-inode). 131030f712c9SDave Chinner */ 131130f712c9SDave Chinner int /* error */ 131230f712c9SDave Chinner xfs_bmap_first_unused( 131329b3e94aSChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 131429b3e94aSChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 131530f712c9SDave Chinner xfs_extlen_t len, /* size of hole to find */ 131630f712c9SDave Chinner xfs_fileoff_t *first_unused, /* unused block */ 131730f712c9SDave Chinner int whichfork) /* data or attr fork */ 131830f712c9SDave Chinner { 131929b3e94aSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 132029b3e94aSChristoph Hellwig struct xfs_bmbt_irec got; 1321b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 132229b3e94aSChristoph Hellwig xfs_fileoff_t lastaddr = 0; 132329b3e94aSChristoph Hellwig xfs_fileoff_t lowest, max; 132429b3e94aSChristoph Hellwig int error; 132530f712c9SDave Chinner 132630f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || 132730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || 132830f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); 132929b3e94aSChristoph Hellwig 133030f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { 133130f712c9SDave Chinner *first_unused = 0; 133230f712c9SDave Chinner return 0; 133330f712c9SDave Chinner } 133429b3e94aSChristoph Hellwig 133529b3e94aSChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 133629b3e94aSChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 133729b3e94aSChristoph Hellwig if (error) 133830f712c9SDave Chinner return error; 133929b3e94aSChristoph Hellwig } 1340f2285c14SChristoph Hellwig 134129b3e94aSChristoph Hellwig lowest = max = *first_unused; 1342b2b1712aSChristoph Hellwig for_each_xfs_iext(ifp, &icur, &got) { 134330f712c9SDave Chinner /* 134430f712c9SDave Chinner * See if the hole before this extent will work. 134530f712c9SDave Chinner */ 1346f2285c14SChristoph Hellwig if (got.br_startoff >= lowest + len && 134729b3e94aSChristoph Hellwig got.br_startoff - max >= len) 134829b3e94aSChristoph Hellwig break; 1349f2285c14SChristoph Hellwig lastaddr = got.br_startoff + got.br_blockcount; 135030f712c9SDave Chinner max = XFS_FILEOFF_MAX(lastaddr, lowest); 135130f712c9SDave Chinner } 135229b3e94aSChristoph Hellwig 135330f712c9SDave Chinner *first_unused = max; 135430f712c9SDave Chinner return 0; 135530f712c9SDave Chinner } 135630f712c9SDave Chinner 135730f712c9SDave Chinner /* 135830f712c9SDave Chinner * Returns the file-relative block number of the last block - 1 before 135930f712c9SDave Chinner * last_block (input value) in the file. 136030f712c9SDave Chinner * This is not based on i_size, it is based on the extent records. 136130f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 136230f712c9SDave Chinner */ 136330f712c9SDave Chinner int /* error */ 136430f712c9SDave Chinner xfs_bmap_last_before( 136586685f7bSChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 136686685f7bSChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 136730f712c9SDave Chinner xfs_fileoff_t *last_block, /* last block */ 136830f712c9SDave Chinner int whichfork) /* data or attr fork */ 136930f712c9SDave Chinner { 137086685f7bSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 137186685f7bSChristoph Hellwig struct xfs_bmbt_irec got; 1372b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 137386685f7bSChristoph Hellwig int error; 137430f712c9SDave Chinner 137586685f7bSChristoph Hellwig switch (XFS_IFORK_FORMAT(ip, whichfork)) { 137686685f7bSChristoph Hellwig case XFS_DINODE_FMT_LOCAL: 137730f712c9SDave Chinner *last_block = 0; 137830f712c9SDave Chinner return 0; 137986685f7bSChristoph Hellwig case XFS_DINODE_FMT_BTREE: 138086685f7bSChristoph Hellwig case XFS_DINODE_FMT_EXTENTS: 138186685f7bSChristoph Hellwig break; 138286685f7bSChristoph Hellwig default: 138386685f7bSChristoph Hellwig return -EIO; 138430f712c9SDave Chinner } 138586685f7bSChristoph Hellwig 138686685f7bSChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 138786685f7bSChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 138886685f7bSChristoph Hellwig if (error) 138930f712c9SDave Chinner return error; 139030f712c9SDave Chinner } 139186685f7bSChristoph Hellwig 1392b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent_before(ip, ifp, last_block, &icur, &got)) 139386685f7bSChristoph Hellwig *last_block = 0; 139430f712c9SDave Chinner return 0; 139530f712c9SDave Chinner } 139630f712c9SDave Chinner 139730f712c9SDave Chinner int 139830f712c9SDave Chinner xfs_bmap_last_extent( 139930f712c9SDave Chinner struct xfs_trans *tp, 140030f712c9SDave Chinner struct xfs_inode *ip, 140130f712c9SDave Chinner int whichfork, 140230f712c9SDave Chinner struct xfs_bmbt_irec *rec, 140330f712c9SDave Chinner int *is_empty) 140430f712c9SDave Chinner { 140530f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 1406b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 140730f712c9SDave Chinner int error; 140830f712c9SDave Chinner 140930f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 141030f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 141130f712c9SDave Chinner if (error) 141230f712c9SDave Chinner return error; 141330f712c9SDave Chinner } 141430f712c9SDave Chinner 1415b2b1712aSChristoph Hellwig xfs_iext_last(ifp, &icur); 1416b2b1712aSChristoph Hellwig if (!xfs_iext_get_extent(ifp, &icur, rec)) 141730f712c9SDave Chinner *is_empty = 1; 1418b2b1712aSChristoph Hellwig else 141930f712c9SDave Chinner *is_empty = 0; 142030f712c9SDave Chinner return 0; 142130f712c9SDave Chinner } 142230f712c9SDave Chinner 142330f712c9SDave Chinner /* 142430f712c9SDave Chinner * Check the last inode extent to determine whether this allocation will result 142530f712c9SDave Chinner * in blocks being allocated at the end of the file. When we allocate new data 142630f712c9SDave Chinner * blocks at the end of the file which do not start at the previous data block, 142730f712c9SDave Chinner * we will try to align the new blocks at stripe unit boundaries. 142830f712c9SDave Chinner * 142930f712c9SDave Chinner * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be 143030f712c9SDave Chinner * at, or past the EOF. 143130f712c9SDave Chinner */ 143230f712c9SDave Chinner STATIC int 143330f712c9SDave Chinner xfs_bmap_isaeof( 143430f712c9SDave Chinner struct xfs_bmalloca *bma, 143530f712c9SDave Chinner int whichfork) 143630f712c9SDave Chinner { 143730f712c9SDave Chinner struct xfs_bmbt_irec rec; 143830f712c9SDave Chinner int is_empty; 143930f712c9SDave Chinner int error; 144030f712c9SDave Chinner 1441749f24f3SThomas Meyer bma->aeof = false; 144230f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, 144330f712c9SDave Chinner &is_empty); 144430f712c9SDave Chinner if (error) 144530f712c9SDave Chinner return error; 144630f712c9SDave Chinner 144730f712c9SDave Chinner if (is_empty) { 1448749f24f3SThomas Meyer bma->aeof = true; 144930f712c9SDave Chinner return 0; 145030f712c9SDave Chinner } 145130f712c9SDave Chinner 145230f712c9SDave Chinner /* 145330f712c9SDave Chinner * Check if we are allocation or past the last extent, or at least into 145430f712c9SDave Chinner * the last delayed allocated extent. 145530f712c9SDave Chinner */ 145630f712c9SDave Chinner bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || 145730f712c9SDave Chinner (bma->offset >= rec.br_startoff && 145830f712c9SDave Chinner isnullstartblock(rec.br_startblock)); 145930f712c9SDave Chinner return 0; 146030f712c9SDave Chinner } 146130f712c9SDave Chinner 146230f712c9SDave Chinner /* 146330f712c9SDave Chinner * Returns the file-relative block number of the first block past eof in 146430f712c9SDave Chinner * the file. This is not based on i_size, it is based on the extent records. 146530f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 146630f712c9SDave Chinner */ 146730f712c9SDave Chinner int 146830f712c9SDave Chinner xfs_bmap_last_offset( 146930f712c9SDave Chinner struct xfs_inode *ip, 147030f712c9SDave Chinner xfs_fileoff_t *last_block, 147130f712c9SDave Chinner int whichfork) 147230f712c9SDave Chinner { 147330f712c9SDave Chinner struct xfs_bmbt_irec rec; 147430f712c9SDave Chinner int is_empty; 147530f712c9SDave Chinner int error; 147630f712c9SDave Chinner 147730f712c9SDave Chinner *last_block = 0; 147830f712c9SDave Chinner 147930f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) 148030f712c9SDave Chinner return 0; 148130f712c9SDave Chinner 148230f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && 148330f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 14842451337dSDave Chinner return -EIO; 148530f712c9SDave Chinner 148630f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); 148730f712c9SDave Chinner if (error || is_empty) 148830f712c9SDave Chinner return error; 148930f712c9SDave Chinner 149030f712c9SDave Chinner *last_block = rec.br_startoff + rec.br_blockcount; 149130f712c9SDave Chinner return 0; 149230f712c9SDave Chinner } 149330f712c9SDave Chinner 149430f712c9SDave Chinner /* 149530f712c9SDave Chinner * Returns whether the selected fork of the inode has exactly one 149630f712c9SDave Chinner * block or not. For the data fork we check this matches di_size, 149730f712c9SDave Chinner * implying the file's range is 0..bsize-1. 149830f712c9SDave Chinner */ 149930f712c9SDave Chinner int /* 1=>1 block, 0=>otherwise */ 150030f712c9SDave Chinner xfs_bmap_one_block( 150130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode */ 150230f712c9SDave Chinner int whichfork) /* data or attr fork */ 150330f712c9SDave Chinner { 150430f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 150530f712c9SDave Chinner int rval; /* return value */ 150630f712c9SDave Chinner xfs_bmbt_irec_t s; /* internal version of extent */ 1507b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 150830f712c9SDave Chinner 150930f712c9SDave Chinner #ifndef DEBUG 151030f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) 151130f712c9SDave Chinner return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; 151230f712c9SDave Chinner #endif /* !DEBUG */ 151330f712c9SDave Chinner if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) 151430f712c9SDave Chinner return 0; 151530f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 151630f712c9SDave Chinner return 0; 151730f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 151830f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 1519b2b1712aSChristoph Hellwig xfs_iext_first(ifp, &icur); 1520b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &icur, &s); 152130f712c9SDave Chinner rval = s.br_startoff == 0 && s.br_blockcount == 1; 152230f712c9SDave Chinner if (rval && whichfork == XFS_DATA_FORK) 152330f712c9SDave Chinner ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); 152430f712c9SDave Chinner return rval; 152530f712c9SDave Chinner } 152630f712c9SDave Chinner 152730f712c9SDave Chinner /* 152830f712c9SDave Chinner * Extent tree manipulation functions used during allocation. 152930f712c9SDave Chinner */ 153030f712c9SDave Chinner 153130f712c9SDave Chinner /* 153230f712c9SDave Chinner * Convert a delayed allocation to a real allocation. 153330f712c9SDave Chinner */ 153430f712c9SDave Chinner STATIC int /* error */ 153530f712c9SDave Chinner xfs_bmap_add_extent_delay_real( 153660b4984fSDarrick J. Wong struct xfs_bmalloca *bma, 153760b4984fSDarrick J. Wong int whichfork) 153830f712c9SDave Chinner { 153930f712c9SDave Chinner struct xfs_bmbt_irec *new = &bma->got; 154030f712c9SDave Chinner int error; /* error return value */ 154130f712c9SDave Chinner int i; /* temp state */ 154230f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 154330f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 154430f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 154530f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 154630f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 1547060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 154830f712c9SDave Chinner xfs_filblks_t da_new; /* new count del alloc blocks used */ 154930f712c9SDave Chinner xfs_filblks_t da_old; /* old count del alloc blocks used */ 155030f712c9SDave Chinner xfs_filblks_t temp=0; /* value for da_new calculations */ 155130f712c9SDave Chinner int tmp_rval; /* partial logging flags */ 1552c29aad41SEric Sandeen struct xfs_mount *mp; 155360b4984fSDarrick J. Wong xfs_extnum_t *nextents; 15544dcb8869SChristoph Hellwig struct xfs_bmbt_irec old; 155530f712c9SDave Chinner 1556f1f96c49SEric Sandeen mp = bma->ip->i_mount; 15576d3eb1ecSDarrick J. Wong ifp = XFS_IFORK_PTR(bma->ip, whichfork); 155860b4984fSDarrick J. Wong ASSERT(whichfork != XFS_ATTR_FORK); 155960b4984fSDarrick J. Wong nextents = (whichfork == XFS_COW_FORK ? &bma->ip->i_cnextents : 156060b4984fSDarrick J. Wong &bma->ip->i_d.di_nextents); 156130f712c9SDave Chinner 156230f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 156330f712c9SDave Chinner ASSERT(!bma->cur || 156430f712c9SDave Chinner (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); 156530f712c9SDave Chinner 1566ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 156730f712c9SDave Chinner 156830f712c9SDave Chinner #define LEFT r[0] 156930f712c9SDave Chinner #define RIGHT r[1] 157030f712c9SDave Chinner #define PREV r[2] 157130f712c9SDave Chinner 157230f712c9SDave Chinner /* 157330f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 157430f712c9SDave Chinner */ 1575b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &bma->icur, &PREV); 157630f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 15774dcb8869SChristoph Hellwig ASSERT(isnullstartblock(PREV.br_startblock)); 157830f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 157930f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 158030f712c9SDave Chinner 158130f712c9SDave Chinner da_old = startblockval(PREV.br_startblock); 158230f712c9SDave Chinner da_new = 0; 158330f712c9SDave Chinner 158430f712c9SDave Chinner /* 158530f712c9SDave Chinner * Set flags determining what part of the previous delayed allocation 158630f712c9SDave Chinner * extent is being replaced by a real allocation. 158730f712c9SDave Chinner */ 158830f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 158930f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 159030f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 159130f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 159230f712c9SDave Chinner 159330f712c9SDave Chinner /* 159430f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 159530f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 159630f712c9SDave Chinner */ 1597b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, &bma->icur, &LEFT)) { 159830f712c9SDave Chinner state |= BMAP_LEFT_VALID; 159930f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 160030f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 160130f712c9SDave Chinner } 160230f712c9SDave Chinner 160330f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 160430f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 160530f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 160630f712c9SDave Chinner LEFT.br_state == new->br_state && 160730f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 160830f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 160930f712c9SDave Chinner 161030f712c9SDave Chinner /* 161130f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 161230f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 161330f712c9SDave Chinner * Also check for all-three-contiguous being too large. 161430f712c9SDave Chinner */ 1615b2b1712aSChristoph Hellwig if (xfs_iext_peek_next_extent(ifp, &bma->icur, &RIGHT)) { 161630f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 161730f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 161830f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 161930f712c9SDave Chinner } 162030f712c9SDave Chinner 162130f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 162230f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 162330f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 162430f712c9SDave Chinner new->br_state == RIGHT.br_state && 162530f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 162630f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 162730f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 162830f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 162930f712c9SDave Chinner BMAP_RIGHT_FILLING) || 163030f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 163130f712c9SDave Chinner <= MAXEXTLEN)) 163230f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 163330f712c9SDave Chinner 163430f712c9SDave Chinner error = 0; 163530f712c9SDave Chinner /* 163630f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 163730f712c9SDave Chinner */ 163830f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 163930f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 164030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 164130f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 164230f712c9SDave Chinner /* 164330f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 164430f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 164530f712c9SDave Chinner */ 16464dcb8869SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; 164730f712c9SDave Chinner 1648c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1649c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1650b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1651b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &LEFT); 165260b4984fSDarrick J. Wong (*nextents)--; 16530d045540SChristoph Hellwig 165430f712c9SDave Chinner if (bma->cur == NULL) 165530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 165630f712c9SDave Chinner else { 165730f712c9SDave Chinner rval = XFS_ILOG_CORE; 1658e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &RIGHT, &i); 165930f712c9SDave Chinner if (error) 166030f712c9SDave Chinner goto done; 1661c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 166230f712c9SDave Chinner error = xfs_btree_delete(bma->cur, &i); 166330f712c9SDave Chinner if (error) 166430f712c9SDave Chinner goto done; 1665c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 166630f712c9SDave Chinner error = xfs_btree_decrement(bma->cur, 0, &i); 166730f712c9SDave Chinner if (error) 166830f712c9SDave Chinner goto done; 1669c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1670a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 167130f712c9SDave Chinner if (error) 167230f712c9SDave Chinner goto done; 167330f712c9SDave Chinner } 167430f712c9SDave Chinner break; 167530f712c9SDave Chinner 167630f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 167730f712c9SDave Chinner /* 167830f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 167930f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 168030f712c9SDave Chinner */ 16814dcb8869SChristoph Hellwig old = LEFT; 16824dcb8869SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount; 16830d045540SChristoph Hellwig 1684c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1685b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1686b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &LEFT); 168730f712c9SDave Chinner 168830f712c9SDave Chinner if (bma->cur == NULL) 168930f712c9SDave Chinner rval = XFS_ILOG_DEXT; 169030f712c9SDave Chinner else { 169130f712c9SDave Chinner rval = 0; 1692e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &old, &i); 169330f712c9SDave Chinner if (error) 169430f712c9SDave Chinner goto done; 1695c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1696a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 169730f712c9SDave Chinner if (error) 169830f712c9SDave Chinner goto done; 169930f712c9SDave Chinner } 170030f712c9SDave Chinner break; 170130f712c9SDave Chinner 170230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 170330f712c9SDave Chinner /* 170430f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 170530f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 170630f712c9SDave Chinner */ 17074dcb8869SChristoph Hellwig PREV.br_startblock = new->br_startblock; 17084dcb8869SChristoph Hellwig PREV.br_blockcount += RIGHT.br_blockcount; 17090d045540SChristoph Hellwig 1710b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 1711c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1712b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1713b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 171430f712c9SDave Chinner 171530f712c9SDave Chinner if (bma->cur == NULL) 171630f712c9SDave Chinner rval = XFS_ILOG_DEXT; 171730f712c9SDave Chinner else { 171830f712c9SDave Chinner rval = 0; 1719e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &RIGHT, &i); 172030f712c9SDave Chinner if (error) 172130f712c9SDave Chinner goto done; 1722c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1723a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &PREV); 172430f712c9SDave Chinner if (error) 172530f712c9SDave Chinner goto done; 172630f712c9SDave Chinner } 172730f712c9SDave Chinner break; 172830f712c9SDave Chinner 172930f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 173030f712c9SDave Chinner /* 173130f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 173230f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 173330f712c9SDave Chinner * the new one. 173430f712c9SDave Chinner */ 17354dcb8869SChristoph Hellwig PREV.br_startblock = new->br_startblock; 17364dcb8869SChristoph Hellwig PREV.br_state = new->br_state; 1737b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 173830f712c9SDave Chinner 173960b4984fSDarrick J. Wong (*nextents)++; 174030f712c9SDave Chinner if (bma->cur == NULL) 174130f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 174230f712c9SDave Chinner else { 174330f712c9SDave Chinner rval = XFS_ILOG_CORE; 1744e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 174530f712c9SDave Chinner if (error) 174630f712c9SDave Chinner goto done; 1747c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 174830f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 174930f712c9SDave Chinner if (error) 175030f712c9SDave Chinner goto done; 1751c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 175230f712c9SDave Chinner } 175330f712c9SDave Chinner break; 175430f712c9SDave Chinner 175530f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 175630f712c9SDave Chinner /* 175730f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 175830f712c9SDave Chinner * The left neighbor is contiguous. 175930f712c9SDave Chinner */ 17604dcb8869SChristoph Hellwig old = LEFT; 17614dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 17624dcb8869SChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 17634dcb8869SChristoph Hellwig startblockval(PREV.br_startblock)); 17644dcb8869SChristoph Hellwig 17654dcb8869SChristoph Hellwig LEFT.br_blockcount += new->br_blockcount; 176630f712c9SDave Chinner 1767bf99971cSChristoph Hellwig PREV.br_blockcount = temp; 17684dcb8869SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 17694dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 17700d045540SChristoph Hellwig 1771b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 1772b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1773b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &LEFT); 17744dcb8869SChristoph Hellwig 177530f712c9SDave Chinner if (bma->cur == NULL) 177630f712c9SDave Chinner rval = XFS_ILOG_DEXT; 177730f712c9SDave Chinner else { 177830f712c9SDave Chinner rval = 0; 1779e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &old, &i); 178030f712c9SDave Chinner if (error) 178130f712c9SDave Chinner goto done; 1782c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1783a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 178430f712c9SDave Chinner if (error) 178530f712c9SDave Chinner goto done; 178630f712c9SDave Chinner } 178730f712c9SDave Chinner break; 178830f712c9SDave Chinner 178930f712c9SDave Chinner case BMAP_LEFT_FILLING: 179030f712c9SDave Chinner /* 179130f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 179230f712c9SDave Chinner * The left neighbor is not contiguous. 179330f712c9SDave Chinner */ 1794b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, new); 179560b4984fSDarrick J. Wong (*nextents)++; 179630f712c9SDave Chinner if (bma->cur == NULL) 179730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 179830f712c9SDave Chinner else { 179930f712c9SDave Chinner rval = XFS_ILOG_CORE; 1800e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 180130f712c9SDave Chinner if (error) 180230f712c9SDave Chinner goto done; 1803c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 180430f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 180530f712c9SDave Chinner if (error) 180630f712c9SDave Chinner goto done; 1807c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 180830f712c9SDave Chinner } 180930f712c9SDave Chinner 18106d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 181130f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 18122c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, 18136d3eb1ecSDarrick J. Wong &bma->cur, 1, &tmp_rval, whichfork); 181430f712c9SDave Chinner rval |= tmp_rval; 181530f712c9SDave Chinner if (error) 181630f712c9SDave Chinner goto done; 181730f712c9SDave Chinner } 18184dcb8869SChristoph Hellwig 18194dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 182030f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 182130f712c9SDave Chinner startblockval(PREV.br_startblock) - 182230f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 18234dcb8869SChristoph Hellwig 18244dcb8869SChristoph Hellwig PREV.br_startoff = new_endoff; 18254dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 18264dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 1827b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 18280254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &PREV, state); 1829b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 183030f712c9SDave Chinner break; 183130f712c9SDave Chinner 183230f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 183330f712c9SDave Chinner /* 183430f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 183530f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 183630f712c9SDave Chinner */ 18374dcb8869SChristoph Hellwig old = RIGHT; 18384dcb8869SChristoph Hellwig RIGHT.br_startoff = new->br_startoff; 18394dcb8869SChristoph Hellwig RIGHT.br_startblock = new->br_startblock; 18404dcb8869SChristoph Hellwig RIGHT.br_blockcount += new->br_blockcount; 18414dcb8869SChristoph Hellwig 184230f712c9SDave Chinner if (bma->cur == NULL) 184330f712c9SDave Chinner rval = XFS_ILOG_DEXT; 184430f712c9SDave Chinner else { 184530f712c9SDave Chinner rval = 0; 1846e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &old, &i); 184730f712c9SDave Chinner if (error) 184830f712c9SDave Chinner goto done; 1849c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 1850a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &RIGHT); 185130f712c9SDave Chinner if (error) 185230f712c9SDave Chinner goto done; 185330f712c9SDave Chinner } 185430f712c9SDave Chinner 18554dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 185630f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 185730f712c9SDave Chinner startblockval(PREV.br_startblock)); 18584dcb8869SChristoph Hellwig 18594dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 18604dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 186130f712c9SDave Chinner 1862b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 1863b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 1864b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &RIGHT); 186530f712c9SDave Chinner break; 186630f712c9SDave Chinner 186730f712c9SDave Chinner case BMAP_RIGHT_FILLING: 186830f712c9SDave Chinner /* 186930f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 187030f712c9SDave Chinner * The right neighbor is not contiguous. 187130f712c9SDave Chinner */ 1872b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, new); 187360b4984fSDarrick J. Wong (*nextents)++; 187430f712c9SDave Chinner if (bma->cur == NULL) 187530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 187630f712c9SDave Chinner else { 187730f712c9SDave Chinner rval = XFS_ILOG_CORE; 1878e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 187930f712c9SDave Chinner if (error) 188030f712c9SDave Chinner goto done; 1881c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 188230f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 188330f712c9SDave Chinner if (error) 188430f712c9SDave Chinner goto done; 1885c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 188630f712c9SDave Chinner } 188730f712c9SDave Chinner 18886d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 188930f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 18902c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 1, 18916d3eb1ecSDarrick J. Wong &tmp_rval, whichfork); 189230f712c9SDave Chinner rval |= tmp_rval; 189330f712c9SDave Chinner if (error) 189430f712c9SDave Chinner goto done; 189530f712c9SDave Chinner } 18964dcb8869SChristoph Hellwig 18974dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 189830f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 189930f712c9SDave Chinner startblockval(PREV.br_startblock) - 190030f712c9SDave Chinner (bma->cur ? bma->cur->bc_private.b.allocated : 0)); 19014dcb8869SChristoph Hellwig 19024dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 19034dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 19040254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &PREV, state); 1905b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 190630f712c9SDave Chinner break; 190730f712c9SDave Chinner 190830f712c9SDave Chinner case 0: 190930f712c9SDave Chinner /* 191030f712c9SDave Chinner * Filling in the middle part of a previous delayed allocation. 191130f712c9SDave Chinner * Contiguity is impossible here. 191230f712c9SDave Chinner * This case is avoided almost all the time. 191330f712c9SDave Chinner * 191430f712c9SDave Chinner * We start with a delayed allocation: 191530f712c9SDave Chinner * 191630f712c9SDave Chinner * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ 191730f712c9SDave Chinner * PREV @ idx 191830f712c9SDave Chinner * 191930f712c9SDave Chinner * and we are allocating: 192030f712c9SDave Chinner * +rrrrrrrrrrrrrrrrr+ 192130f712c9SDave Chinner * new 192230f712c9SDave Chinner * 192330f712c9SDave Chinner * and we set it up for insertion as: 192430f712c9SDave Chinner * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ 192530f712c9SDave Chinner * new 192630f712c9SDave Chinner * PREV @ idx LEFT RIGHT 192730f712c9SDave Chinner * inserted at idx + 1 192830f712c9SDave Chinner */ 19294dcb8869SChristoph Hellwig old = PREV; 19304dcb8869SChristoph Hellwig 19314dcb8869SChristoph Hellwig /* LEFT is the new middle */ 193230f712c9SDave Chinner LEFT = *new; 19334dcb8869SChristoph Hellwig 19344dcb8869SChristoph Hellwig /* RIGHT is the new right */ 193530f712c9SDave Chinner RIGHT.br_state = PREV.br_state; 193630f712c9SDave Chinner RIGHT.br_startoff = new_endoff; 19374dcb8869SChristoph Hellwig RIGHT.br_blockcount = 19384dcb8869SChristoph Hellwig PREV.br_startoff + PREV.br_blockcount - new_endoff; 19394dcb8869SChristoph Hellwig RIGHT.br_startblock = 19404dcb8869SChristoph Hellwig nullstartblock(xfs_bmap_worst_indlen(bma->ip, 19414dcb8869SChristoph Hellwig RIGHT.br_blockcount)); 19424dcb8869SChristoph Hellwig 19434dcb8869SChristoph Hellwig /* truncate PREV */ 19444dcb8869SChristoph Hellwig PREV.br_blockcount = new->br_startoff - PREV.br_startoff; 19454dcb8869SChristoph Hellwig PREV.br_startblock = 19464dcb8869SChristoph Hellwig nullstartblock(xfs_bmap_worst_indlen(bma->ip, 19474dcb8869SChristoph Hellwig PREV.br_blockcount)); 1948b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 19494dcb8869SChristoph Hellwig 1950b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 19510254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &RIGHT, state); 19520254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &LEFT, state); 195360b4984fSDarrick J. Wong (*nextents)++; 19544dcb8869SChristoph Hellwig 195530f712c9SDave Chinner if (bma->cur == NULL) 195630f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 195730f712c9SDave Chinner else { 195830f712c9SDave Chinner rval = XFS_ILOG_CORE; 1959e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 196030f712c9SDave Chinner if (error) 196130f712c9SDave Chinner goto done; 1962c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 196330f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 196430f712c9SDave Chinner if (error) 196530f712c9SDave Chinner goto done; 1966c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 196730f712c9SDave Chinner } 196830f712c9SDave Chinner 19696d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 197030f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 19712c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 19726d3eb1ecSDarrick J. Wong 1, &tmp_rval, whichfork); 197330f712c9SDave Chinner rval |= tmp_rval; 197430f712c9SDave Chinner if (error) 197530f712c9SDave Chinner goto done; 197630f712c9SDave Chinner } 19774dcb8869SChristoph Hellwig 19784dcb8869SChristoph Hellwig da_new = startblockval(PREV.br_startblock) + 19794dcb8869SChristoph Hellwig startblockval(RIGHT.br_startblock); 198030f712c9SDave Chinner break; 198130f712c9SDave Chinner 198230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 198330f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 198430f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 198530f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 198630f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 198730f712c9SDave Chinner case BMAP_LEFT_CONTIG: 198830f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 198930f712c9SDave Chinner /* 199030f712c9SDave Chinner * These cases are all impossible. 199130f712c9SDave Chinner */ 199230f712c9SDave Chinner ASSERT(0); 199330f712c9SDave Chinner } 199430f712c9SDave Chinner 19959c194644SDarrick J. Wong /* add reverse mapping */ 19969c194644SDarrick J. Wong error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); 19979c194644SDarrick J. Wong if (error) 19989c194644SDarrick J. Wong goto done; 19999c194644SDarrick J. Wong 200030f712c9SDave Chinner /* convert to a btree if necessary */ 20016d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 200230f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 200330f712c9SDave Chinner 200430f712c9SDave Chinner ASSERT(bma->cur == NULL); 200530f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 20062c3234d1SDarrick J. Wong bma->firstblock, bma->dfops, &bma->cur, 20076d3eb1ecSDarrick J. Wong da_old > 0, &tmp_logflags, whichfork); 200830f712c9SDave Chinner bma->logflags |= tmp_logflags; 200930f712c9SDave Chinner if (error) 201030f712c9SDave Chinner goto done; 201130f712c9SDave Chinner } 201230f712c9SDave Chinner 2013ca1862b0SChristoph Hellwig if (bma->cur) { 2014ca1862b0SChristoph Hellwig da_new += bma->cur->bc_private.b.allocated; 2015ca1862b0SChristoph Hellwig bma->cur->bc_private.b.allocated = 0; 201630f712c9SDave Chinner } 201730f712c9SDave Chinner 2018ca1862b0SChristoph Hellwig /* adjust for changes in reserved delayed indirect blocks */ 2019ca1862b0SChristoph Hellwig if (da_new != da_old) { 2020ca1862b0SChristoph Hellwig ASSERT(state == 0 || da_new < da_old); 2021ca1862b0SChristoph Hellwig error = xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), 2022ca1862b0SChristoph Hellwig false); 2023ca1862b0SChristoph Hellwig } 202430f712c9SDave Chinner 20256d3eb1ecSDarrick J. Wong xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); 202630f712c9SDave Chinner done: 202760b4984fSDarrick J. Wong if (whichfork != XFS_COW_FORK) 202830f712c9SDave Chinner bma->logflags |= rval; 202930f712c9SDave Chinner return error; 203030f712c9SDave Chinner #undef LEFT 203130f712c9SDave Chinner #undef RIGHT 203230f712c9SDave Chinner #undef PREV 203330f712c9SDave Chinner } 203430f712c9SDave Chinner 203530f712c9SDave Chinner /* 203630f712c9SDave Chinner * Convert an unwritten allocation to a real allocation or vice versa. 203730f712c9SDave Chinner */ 203830f712c9SDave Chinner STATIC int /* error */ 203930f712c9SDave Chinner xfs_bmap_add_extent_unwritten_real( 204030f712c9SDave Chinner struct xfs_trans *tp, 204130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 204205a630d7SDarrick J. Wong int whichfork, 2043b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 204430f712c9SDave Chinner xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ 204530f712c9SDave Chinner xfs_bmbt_irec_t *new, /* new data to add to file extents */ 204630f712c9SDave Chinner xfs_fsblock_t *first, /* pointer to firstblock variable */ 20472c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* list of extents to be freed */ 204830f712c9SDave Chinner int *logflagsp) /* inode logging flags */ 204930f712c9SDave Chinner { 205030f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 205130f712c9SDave Chinner int error; /* error return value */ 205230f712c9SDave Chinner int i; /* temp state */ 205330f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 205430f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 205530f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 205630f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 205730f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 2058060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 205905a630d7SDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 206079fa6143SChristoph Hellwig struct xfs_bmbt_irec old; 206130f712c9SDave Chinner 206230f712c9SDave Chinner *logflagsp = 0; 206330f712c9SDave Chinner 206430f712c9SDave Chinner cur = *curp; 206505a630d7SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 206630f712c9SDave Chinner 206730f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 206830f712c9SDave Chinner 2069ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 207030f712c9SDave Chinner 207130f712c9SDave Chinner #define LEFT r[0] 207230f712c9SDave Chinner #define RIGHT r[1] 207330f712c9SDave Chinner #define PREV r[2] 207430f712c9SDave Chinner 207530f712c9SDave Chinner /* 207630f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 207730f712c9SDave Chinner */ 207830f712c9SDave Chinner error = 0; 2079b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, icur, &PREV); 208079fa6143SChristoph Hellwig ASSERT(new->br_state != PREV.br_state); 208130f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 208230f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 208330f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 208430f712c9SDave Chinner 208530f712c9SDave Chinner /* 208630f712c9SDave Chinner * Set flags determining what part of the previous oldext allocation 208730f712c9SDave Chinner * extent is being replaced by a newext allocation. 208830f712c9SDave Chinner */ 208930f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 209030f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 209130f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 209230f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 209330f712c9SDave Chinner 209430f712c9SDave Chinner /* 209530f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 209630f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 209730f712c9SDave Chinner */ 2098b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, icur, &LEFT)) { 209930f712c9SDave Chinner state |= BMAP_LEFT_VALID; 210030f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 210130f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 210230f712c9SDave Chinner } 210330f712c9SDave Chinner 210430f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 210530f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 210630f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 210779fa6143SChristoph Hellwig LEFT.br_state == new->br_state && 210830f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 210930f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 211030f712c9SDave Chinner 211130f712c9SDave Chinner /* 211230f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 211330f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 211430f712c9SDave Chinner * Also check for all-three-contiguous being too large. 211530f712c9SDave Chinner */ 2116b2b1712aSChristoph Hellwig if (xfs_iext_peek_next_extent(ifp, icur, &RIGHT)) { 211730f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 211830f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 211930f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 212030f712c9SDave Chinner } 212130f712c9SDave Chinner 212230f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 212330f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 212430f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 212579fa6143SChristoph Hellwig new->br_state == RIGHT.br_state && 212630f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 212730f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 212830f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 212930f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 213030f712c9SDave Chinner BMAP_RIGHT_FILLING) || 213130f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 213230f712c9SDave Chinner <= MAXEXTLEN)) 213330f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 213430f712c9SDave Chinner 213530f712c9SDave Chinner /* 213630f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 213730f712c9SDave Chinner */ 213830f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 213930f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 214030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 214130f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 214230f712c9SDave Chinner /* 214330f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 214430f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 214530f712c9SDave Chinner */ 214679fa6143SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; 214730f712c9SDave Chinner 2148c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2149c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2150b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2151b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &LEFT); 215205a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 215305a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 2); 215430f712c9SDave Chinner if (cur == NULL) 215530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 215630f712c9SDave Chinner else { 215730f712c9SDave Chinner rval = XFS_ILOG_CORE; 2158e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &RIGHT, &i); 2159e16cf9b0SChristoph Hellwig if (error) 216030f712c9SDave Chinner goto done; 2161c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 216230f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 216330f712c9SDave Chinner goto done; 2164c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 216530f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 216630f712c9SDave Chinner goto done; 2167c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 216830f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 216930f712c9SDave Chinner goto done; 2170c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 217130f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 217230f712c9SDave Chinner goto done; 2173c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2174a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 217579fa6143SChristoph Hellwig if (error) 217630f712c9SDave Chinner goto done; 217730f712c9SDave Chinner } 217830f712c9SDave Chinner break; 217930f712c9SDave Chinner 218030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 218130f712c9SDave Chinner /* 218230f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 218330f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 218430f712c9SDave Chinner */ 218579fa6143SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount; 218630f712c9SDave Chinner 2187c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2188b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2189b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &LEFT); 219005a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 219105a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 219230f712c9SDave Chinner if (cur == NULL) 219330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 219430f712c9SDave Chinner else { 219530f712c9SDave Chinner rval = XFS_ILOG_CORE; 2196e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &PREV, &i); 2197e16cf9b0SChristoph Hellwig if (error) 219830f712c9SDave Chinner goto done; 2199c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 220030f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 220130f712c9SDave Chinner goto done; 2202c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 220330f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 220430f712c9SDave Chinner goto done; 2205c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2206a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 220779fa6143SChristoph Hellwig if (error) 220830f712c9SDave Chinner goto done; 220930f712c9SDave Chinner } 221030f712c9SDave Chinner break; 221130f712c9SDave Chinner 221230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 221330f712c9SDave Chinner /* 221430f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 221530f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 221630f712c9SDave Chinner */ 221779fa6143SChristoph Hellwig PREV.br_blockcount += RIGHT.br_blockcount; 221879fa6143SChristoph Hellwig PREV.br_state = new->br_state; 2219a6818477SChristoph Hellwig 2220b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 2221c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2222b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2223b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 222479fa6143SChristoph Hellwig 222505a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 222605a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 222730f712c9SDave Chinner if (cur == NULL) 222830f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 222930f712c9SDave Chinner else { 223030f712c9SDave Chinner rval = XFS_ILOG_CORE; 2231e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &RIGHT, &i); 2232e16cf9b0SChristoph Hellwig if (error) 223330f712c9SDave Chinner goto done; 2234c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 223530f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 223630f712c9SDave Chinner goto done; 2237c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 223830f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 223930f712c9SDave Chinner goto done; 2240c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2241a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 224279fa6143SChristoph Hellwig if (error) 224330f712c9SDave Chinner goto done; 224430f712c9SDave Chinner } 224530f712c9SDave Chinner break; 224630f712c9SDave Chinner 224730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 224830f712c9SDave Chinner /* 224930f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 225030f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 225130f712c9SDave Chinner * the new one. 225230f712c9SDave Chinner */ 225379fa6143SChristoph Hellwig PREV.br_state = new->br_state; 2254b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 225530f712c9SDave Chinner 225630f712c9SDave Chinner if (cur == NULL) 225730f712c9SDave Chinner rval = XFS_ILOG_DEXT; 225830f712c9SDave Chinner else { 225930f712c9SDave Chinner rval = 0; 2260e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 2261e16cf9b0SChristoph Hellwig if (error) 226230f712c9SDave Chinner goto done; 2263c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2264a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 226579fa6143SChristoph Hellwig if (error) 226630f712c9SDave Chinner goto done; 226730f712c9SDave Chinner } 226830f712c9SDave Chinner break; 226930f712c9SDave Chinner 227030f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 227130f712c9SDave Chinner /* 227230f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 227330f712c9SDave Chinner * The left neighbor is contiguous. 227430f712c9SDave Chinner */ 227579fa6143SChristoph Hellwig LEFT.br_blockcount += new->br_blockcount; 227630f712c9SDave Chinner 227779fa6143SChristoph Hellwig old = PREV; 227879fa6143SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 227979fa6143SChristoph Hellwig PREV.br_startblock += new->br_blockcount; 228079fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 228130f712c9SDave Chinner 2282b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2283b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2284b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &LEFT); 228530f712c9SDave Chinner 228630f712c9SDave Chinner if (cur == NULL) 228730f712c9SDave Chinner rval = XFS_ILOG_DEXT; 228830f712c9SDave Chinner else { 228930f712c9SDave Chinner rval = 0; 2290e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 229179fa6143SChristoph Hellwig if (error) 229230f712c9SDave Chinner goto done; 2293c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2294a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 229579fa6143SChristoph Hellwig if (error) 229630f712c9SDave Chinner goto done; 229779fa6143SChristoph Hellwig error = xfs_btree_decrement(cur, 0, &i); 229879fa6143SChristoph Hellwig if (error) 229930f712c9SDave Chinner goto done; 2300a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 230130f712c9SDave Chinner if (error) 230230f712c9SDave Chinner goto done; 230330f712c9SDave Chinner } 230430f712c9SDave Chinner break; 230530f712c9SDave Chinner 230630f712c9SDave Chinner case BMAP_LEFT_FILLING: 230730f712c9SDave Chinner /* 230830f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 230930f712c9SDave Chinner * The left neighbor is not contiguous. 231030f712c9SDave Chinner */ 231179fa6143SChristoph Hellwig old = PREV; 231279fa6143SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 231379fa6143SChristoph Hellwig PREV.br_startblock += new->br_blockcount; 231479fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 231530f712c9SDave Chinner 2316b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 23170254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 231805a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 231905a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 232030f712c9SDave Chinner if (cur == NULL) 232130f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 232230f712c9SDave Chinner else { 232330f712c9SDave Chinner rval = XFS_ILOG_CORE; 2324e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 232579fa6143SChristoph Hellwig if (error) 232630f712c9SDave Chinner goto done; 2327c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2328a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 232979fa6143SChristoph Hellwig if (error) 233030f712c9SDave Chinner goto done; 233130f712c9SDave Chinner cur->bc_rec.b = *new; 233230f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 233330f712c9SDave Chinner goto done; 2334c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 233530f712c9SDave Chinner } 233630f712c9SDave Chinner break; 233730f712c9SDave Chinner 233830f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 233930f712c9SDave Chinner /* 234030f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 234130f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 234230f712c9SDave Chinner */ 234379fa6143SChristoph Hellwig old = PREV; 234479fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 234530f712c9SDave Chinner 234679fa6143SChristoph Hellwig RIGHT.br_startoff = new->br_startoff; 234779fa6143SChristoph Hellwig RIGHT.br_startblock = new->br_startblock; 234879fa6143SChristoph Hellwig RIGHT.br_blockcount += new->br_blockcount; 2349a6818477SChristoph Hellwig 2350b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2351b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 2352b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &RIGHT); 235330f712c9SDave Chinner 235430f712c9SDave Chinner if (cur == NULL) 235530f712c9SDave Chinner rval = XFS_ILOG_DEXT; 235630f712c9SDave Chinner else { 235730f712c9SDave Chinner rval = 0; 2358e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 235979fa6143SChristoph Hellwig if (error) 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; 236579fa6143SChristoph Hellwig error = xfs_btree_increment(cur, 0, &i); 236679fa6143SChristoph Hellwig if (error) 236730f712c9SDave Chinner goto done; 2368a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &RIGHT); 236979fa6143SChristoph Hellwig if (error) 237030f712c9SDave Chinner goto done; 237130f712c9SDave Chinner } 237230f712c9SDave Chinner break; 237330f712c9SDave Chinner 237430f712c9SDave Chinner case BMAP_RIGHT_FILLING: 237530f712c9SDave Chinner /* 237630f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 237730f712c9SDave Chinner * The right neighbor is not contiguous. 237830f712c9SDave Chinner */ 237979fa6143SChristoph Hellwig old = PREV; 238079fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 238130f712c9SDave Chinner 2382b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2383b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 23840254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 238530f712c9SDave Chinner 238605a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 238705a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 238830f712c9SDave Chinner if (cur == NULL) 238930f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 239030f712c9SDave Chinner else { 239130f712c9SDave Chinner rval = XFS_ILOG_CORE; 2392e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 239379fa6143SChristoph Hellwig if (error) 239430f712c9SDave Chinner goto done; 2395c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2396a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 239779fa6143SChristoph Hellwig if (error) 239830f712c9SDave Chinner goto done; 2399e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 2400e16cf9b0SChristoph Hellwig if (error) 240130f712c9SDave Chinner goto done; 2402c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 240330f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 240430f712c9SDave Chinner goto done; 2405c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 240630f712c9SDave Chinner } 240730f712c9SDave Chinner break; 240830f712c9SDave Chinner 240930f712c9SDave Chinner case 0: 241030f712c9SDave Chinner /* 241130f712c9SDave Chinner * Setting the middle part of a previous oldext extent to 241230f712c9SDave Chinner * newext. Contiguity is impossible here. 241330f712c9SDave Chinner * One extent becomes three extents. 241430f712c9SDave Chinner */ 241579fa6143SChristoph Hellwig old = PREV; 241679fa6143SChristoph Hellwig PREV.br_blockcount = new->br_startoff - PREV.br_startoff; 241730f712c9SDave Chinner 241830f712c9SDave Chinner r[0] = *new; 241930f712c9SDave Chinner r[1].br_startoff = new_endoff; 242030f712c9SDave Chinner r[1].br_blockcount = 242179fa6143SChristoph Hellwig old.br_startoff + old.br_blockcount - new_endoff; 242230f712c9SDave Chinner r[1].br_startblock = new->br_startblock + new->br_blockcount; 242379fa6143SChristoph Hellwig r[1].br_state = PREV.br_state; 242430f712c9SDave Chinner 2425b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2426b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 24270254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &r[1], state); 24280254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &r[0], state); 242930f712c9SDave Chinner 243005a630d7SDarrick J. Wong XFS_IFORK_NEXT_SET(ip, whichfork, 243105a630d7SDarrick J. Wong XFS_IFORK_NEXTENTS(ip, whichfork) + 2); 243230f712c9SDave Chinner if (cur == NULL) 243330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 243430f712c9SDave Chinner else { 243530f712c9SDave Chinner rval = XFS_ILOG_CORE; 2436e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 243779fa6143SChristoph Hellwig if (error) 243830f712c9SDave Chinner goto done; 2439c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 244030f712c9SDave Chinner /* new right extent - oldext */ 2441a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &r[1]); 2442a67d00a5SChristoph Hellwig if (error) 244330f712c9SDave Chinner goto done; 244430f712c9SDave Chinner /* new left extent - oldext */ 244530f712c9SDave Chinner cur->bc_rec.b = PREV; 244630f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 244730f712c9SDave Chinner goto done; 2448c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 244930f712c9SDave Chinner /* 245030f712c9SDave Chinner * Reset the cursor to the position of the new extent 245130f712c9SDave Chinner * we are about to insert as we can't trust it after 245230f712c9SDave Chinner * the previous insert. 245330f712c9SDave Chinner */ 2454e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 2455e16cf9b0SChristoph Hellwig if (error) 245630f712c9SDave Chinner goto done; 2457c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 245830f712c9SDave Chinner /* new middle extent - newext */ 245930f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 246030f712c9SDave Chinner goto done; 2461c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 246230f712c9SDave Chinner } 246330f712c9SDave Chinner break; 246430f712c9SDave Chinner 246530f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 246630f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 246730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 246830f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 246930f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 247030f712c9SDave Chinner case BMAP_LEFT_CONTIG: 247130f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 247230f712c9SDave Chinner /* 247330f712c9SDave Chinner * These cases are all impossible. 247430f712c9SDave Chinner */ 247530f712c9SDave Chinner ASSERT(0); 247630f712c9SDave Chinner } 247730f712c9SDave Chinner 24789c194644SDarrick J. Wong /* update reverse mappings */ 247905a630d7SDarrick J. Wong error = xfs_rmap_convert_extent(mp, dfops, ip, whichfork, new); 24809c194644SDarrick J. Wong if (error) 24819c194644SDarrick J. Wong goto done; 24829c194644SDarrick J. Wong 248330f712c9SDave Chinner /* convert to a btree if necessary */ 248405a630d7SDarrick J. Wong if (xfs_bmap_needs_btree(ip, whichfork)) { 248530f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 248630f712c9SDave Chinner 248730f712c9SDave Chinner ASSERT(cur == NULL); 24882c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, &cur, 248905a630d7SDarrick J. Wong 0, &tmp_logflags, whichfork); 249030f712c9SDave Chinner *logflagsp |= tmp_logflags; 249130f712c9SDave Chinner if (error) 249230f712c9SDave Chinner goto done; 249330f712c9SDave Chinner } 249430f712c9SDave Chinner 249530f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 249630f712c9SDave Chinner if (cur) { 249730f712c9SDave Chinner cur->bc_private.b.allocated = 0; 249830f712c9SDave Chinner *curp = cur; 249930f712c9SDave Chinner } 250030f712c9SDave Chinner 250105a630d7SDarrick J. Wong xfs_bmap_check_leaf_extents(*curp, ip, whichfork); 250230f712c9SDave Chinner done: 250330f712c9SDave Chinner *logflagsp |= rval; 250430f712c9SDave Chinner return error; 250530f712c9SDave Chinner #undef LEFT 250630f712c9SDave Chinner #undef RIGHT 250730f712c9SDave Chinner #undef PREV 250830f712c9SDave Chinner } 250930f712c9SDave Chinner 251030f712c9SDave Chinner /* 251130f712c9SDave Chinner * Convert a hole to a delayed allocation. 251230f712c9SDave Chinner */ 251330f712c9SDave Chinner STATIC void 251430f712c9SDave Chinner xfs_bmap_add_extent_hole_delay( 251530f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 2516be51f811SDarrick J. Wong int whichfork, 2517b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 251830f712c9SDave Chinner xfs_bmbt_irec_t *new) /* new data to add to file extents */ 251930f712c9SDave Chinner { 252030f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 252130f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 252230f712c9SDave Chinner xfs_filblks_t newlen=0; /* new indirect size */ 252330f712c9SDave Chinner xfs_filblks_t oldlen=0; /* old indirect size */ 252430f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 2525060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 25263ffc18ecSChristoph Hellwig xfs_filblks_t temp; /* temp for indirect calculations */ 252730f712c9SDave Chinner 2528be51f811SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 252930f712c9SDave Chinner ASSERT(isnullstartblock(new->br_startblock)); 253030f712c9SDave Chinner 253130f712c9SDave Chinner /* 253230f712c9SDave Chinner * Check and set flags if this segment has a left neighbor 253330f712c9SDave Chinner */ 2534b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, icur, &left)) { 253530f712c9SDave Chinner state |= BMAP_LEFT_VALID; 253630f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 253730f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 253830f712c9SDave Chinner } 253930f712c9SDave Chinner 254030f712c9SDave Chinner /* 254130f712c9SDave Chinner * Check and set flags if the current (right) segment exists. 254230f712c9SDave Chinner * If it doesn't exist, we're converting the hole at end-of-file. 254330f712c9SDave Chinner */ 2544b2b1712aSChristoph Hellwig if (xfs_iext_get_extent(ifp, icur, &right)) { 254530f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 254630f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 254730f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 254830f712c9SDave Chinner } 254930f712c9SDave Chinner 255030f712c9SDave Chinner /* 255130f712c9SDave Chinner * Set contiguity flags on the left and right neighbors. 255230f712c9SDave Chinner * Don't let extents get too large, even if the pieces are contiguous. 255330f712c9SDave Chinner */ 255430f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && 255530f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 255630f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 255730f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 255830f712c9SDave Chinner 255930f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && 256030f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 256130f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 256230f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 256330f712c9SDave Chinner (left.br_blockcount + new->br_blockcount + 256430f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN))) 256530f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 256630f712c9SDave Chinner 256730f712c9SDave Chinner /* 256830f712c9SDave Chinner * Switch out based on the contiguity flags. 256930f712c9SDave Chinner */ 257030f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 257130f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 257230f712c9SDave Chinner /* 257330f712c9SDave Chinner * New allocation is contiguous with delayed allocations 257430f712c9SDave Chinner * on the left and on the right. 257530f712c9SDave Chinner * Merge all three into a single extent record. 257630f712c9SDave Chinner */ 257730f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount + 257830f712c9SDave Chinner right.br_blockcount; 257930f712c9SDave Chinner 258030f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 258130f712c9SDave Chinner startblockval(new->br_startblock) + 258230f712c9SDave Chinner startblockval(right.br_startblock); 25830e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 25840e339ef8SBrian Foster oldlen); 25853ffc18ecSChristoph Hellwig left.br_startblock = nullstartblock(newlen); 25863ffc18ecSChristoph Hellwig left.br_blockcount = temp; 258730f712c9SDave Chinner 2588c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2589b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2590b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 259130f712c9SDave Chinner break; 259230f712c9SDave Chinner 259330f712c9SDave Chinner case BMAP_LEFT_CONTIG: 259430f712c9SDave Chinner /* 259530f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 259630f712c9SDave Chinner * on the left. 259730f712c9SDave Chinner * Merge the new allocation with the left neighbor. 259830f712c9SDave Chinner */ 259930f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount; 260030f712c9SDave Chinner 260130f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 260230f712c9SDave Chinner startblockval(new->br_startblock); 26030e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 26040e339ef8SBrian Foster oldlen); 26053ffc18ecSChristoph Hellwig left.br_blockcount = temp; 26063ffc18ecSChristoph Hellwig left.br_startblock = nullstartblock(newlen); 260741d196f4SChristoph Hellwig 2608b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2609b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 261030f712c9SDave Chinner break; 261130f712c9SDave Chinner 261230f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 261330f712c9SDave Chinner /* 261430f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 261530f712c9SDave Chinner * on the right. 261630f712c9SDave Chinner * Merge the new allocation with the right neighbor. 261730f712c9SDave Chinner */ 261830f712c9SDave Chinner temp = new->br_blockcount + right.br_blockcount; 261930f712c9SDave Chinner oldlen = startblockval(new->br_startblock) + 262030f712c9SDave Chinner startblockval(right.br_startblock); 26210e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 26220e339ef8SBrian Foster oldlen); 26233ffc18ecSChristoph Hellwig right.br_startoff = new->br_startoff; 26243ffc18ecSChristoph Hellwig right.br_startblock = nullstartblock(newlen); 26253ffc18ecSChristoph Hellwig right.br_blockcount = temp; 2626b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &right); 262730f712c9SDave Chinner break; 262830f712c9SDave Chinner 262930f712c9SDave Chinner case 0: 263030f712c9SDave Chinner /* 263130f712c9SDave Chinner * New allocation is not contiguous with another 263230f712c9SDave Chinner * delayed allocation. 263330f712c9SDave Chinner * Insert a new entry. 263430f712c9SDave Chinner */ 263530f712c9SDave Chinner oldlen = newlen = 0; 26360254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 263730f712c9SDave Chinner break; 263830f712c9SDave Chinner } 263930f712c9SDave Chinner if (oldlen != newlen) { 264030f712c9SDave Chinner ASSERT(oldlen > newlen); 26410d485adaSDave Chinner xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), 26420d485adaSDave Chinner false); 264330f712c9SDave Chinner /* 264430f712c9SDave Chinner * Nothing to do for disk quota accounting here. 264530f712c9SDave Chinner */ 264630f712c9SDave Chinner } 264730f712c9SDave Chinner } 264830f712c9SDave Chinner 264930f712c9SDave Chinner /* 265030f712c9SDave Chinner * Convert a hole to a real allocation. 265130f712c9SDave Chinner */ 265230f712c9SDave Chinner STATIC int /* error */ 265330f712c9SDave Chinner xfs_bmap_add_extent_hole_real( 26546d04558fSChristoph Hellwig struct xfs_trans *tp, 26556d04558fSChristoph Hellwig struct xfs_inode *ip, 26566d04558fSChristoph Hellwig int whichfork, 2657b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 26586d04558fSChristoph Hellwig struct xfs_btree_cur **curp, 26596d04558fSChristoph Hellwig struct xfs_bmbt_irec *new, 26606d04558fSChristoph Hellwig xfs_fsblock_t *first, 26616d04558fSChristoph Hellwig struct xfs_defer_ops *dfops, 26626d04558fSChristoph Hellwig int *logflagsp) 266330f712c9SDave Chinner { 26646d04558fSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 26656d04558fSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 26666d04558fSChristoph Hellwig struct xfs_btree_cur *cur = *curp; 266730f712c9SDave Chinner int error; /* error return value */ 266830f712c9SDave Chinner int i; /* temp state */ 266930f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 267030f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 267130f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 2672060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 26731abb9e55SChristoph Hellwig struct xfs_bmbt_irec old; 267430f712c9SDave Chinner 267530f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 26766d04558fSChristoph Hellwig ASSERT(!cur || !(cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); 267730f712c9SDave Chinner 2678ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 267930f712c9SDave Chinner 268030f712c9SDave Chinner /* 268130f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 268230f712c9SDave Chinner */ 2683b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, icur, &left)) { 268430f712c9SDave Chinner state |= BMAP_LEFT_VALID; 268530f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 268630f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 268730f712c9SDave Chinner } 268830f712c9SDave Chinner 268930f712c9SDave Chinner /* 269030f712c9SDave Chinner * Check and set flags if this segment has a current value. 269130f712c9SDave Chinner * Not true if we're inserting into the "hole" at eof. 269230f712c9SDave Chinner */ 2693b2b1712aSChristoph Hellwig if (xfs_iext_get_extent(ifp, icur, &right)) { 269430f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 269530f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 269630f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 269730f712c9SDave Chinner } 269830f712c9SDave Chinner 269930f712c9SDave Chinner /* 270030f712c9SDave Chinner * We're inserting a real allocation between "left" and "right". 270130f712c9SDave Chinner * Set the contiguity flags. Don't let extents get too large. 270230f712c9SDave Chinner */ 270330f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 270430f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 270530f712c9SDave Chinner left.br_startblock + left.br_blockcount == new->br_startblock && 270630f712c9SDave Chinner left.br_state == new->br_state && 270730f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 270830f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 270930f712c9SDave Chinner 271030f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 271130f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 271230f712c9SDave Chinner new->br_startblock + new->br_blockcount == right.br_startblock && 271330f712c9SDave Chinner new->br_state == right.br_state && 271430f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 271530f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 271630f712c9SDave Chinner left.br_blockcount + new->br_blockcount + 271730f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN)) 271830f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 271930f712c9SDave Chinner 272030f712c9SDave Chinner error = 0; 272130f712c9SDave Chinner /* 272230f712c9SDave Chinner * Select which case we're in here, and implement it. 272330f712c9SDave Chinner */ 272430f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 272530f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 272630f712c9SDave Chinner /* 272730f712c9SDave Chinner * New allocation is contiguous with real allocations on the 272830f712c9SDave Chinner * left and on the right. 272930f712c9SDave Chinner * Merge all three into a single extent record. 273030f712c9SDave Chinner */ 27311abb9e55SChristoph Hellwig left.br_blockcount += new->br_blockcount + right.br_blockcount; 273230f712c9SDave Chinner 2733c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2734b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2735b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 273630f712c9SDave Chinner 27376d04558fSChristoph Hellwig XFS_IFORK_NEXT_SET(ip, whichfork, 27386d04558fSChristoph Hellwig XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 27396d04558fSChristoph Hellwig if (cur == NULL) { 274030f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 274130f712c9SDave Chinner } else { 274230f712c9SDave Chinner rval = XFS_ILOG_CORE; 2743e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &right, &i); 274430f712c9SDave Chinner if (error) 274530f712c9SDave Chinner goto done; 2746c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 27476d04558fSChristoph Hellwig error = xfs_btree_delete(cur, &i); 274830f712c9SDave Chinner if (error) 274930f712c9SDave Chinner goto done; 2750c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 27516d04558fSChristoph Hellwig error = xfs_btree_decrement(cur, 0, &i); 275230f712c9SDave Chinner if (error) 275330f712c9SDave Chinner goto done; 2754c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2755a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &left); 275630f712c9SDave Chinner if (error) 275730f712c9SDave Chinner goto done; 275830f712c9SDave Chinner } 275930f712c9SDave Chinner break; 276030f712c9SDave Chinner 276130f712c9SDave Chinner case BMAP_LEFT_CONTIG: 276230f712c9SDave Chinner /* 276330f712c9SDave Chinner * New allocation is contiguous with a real allocation 276430f712c9SDave Chinner * on the left. 276530f712c9SDave Chinner * Merge the new allocation with the left neighbor. 276630f712c9SDave Chinner */ 27671abb9e55SChristoph Hellwig old = left; 27681abb9e55SChristoph Hellwig left.br_blockcount += new->br_blockcount; 27691d2e0089SChristoph Hellwig 2770b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2771b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 277230f712c9SDave Chinner 27736d04558fSChristoph Hellwig if (cur == NULL) { 277430f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 277530f712c9SDave Chinner } else { 277630f712c9SDave Chinner rval = 0; 2777e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 277830f712c9SDave Chinner if (error) 277930f712c9SDave Chinner goto done; 2780c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2781a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &left); 278230f712c9SDave Chinner if (error) 278330f712c9SDave Chinner goto done; 278430f712c9SDave Chinner } 278530f712c9SDave Chinner break; 278630f712c9SDave Chinner 278730f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 278830f712c9SDave Chinner /* 278930f712c9SDave Chinner * New allocation is contiguous with a real allocation 279030f712c9SDave Chinner * on the right. 279130f712c9SDave Chinner * Merge the new allocation with the right neighbor. 279230f712c9SDave Chinner */ 27931abb9e55SChristoph Hellwig old = right; 2794ca5d8e5bSChristoph Hellwig 27951abb9e55SChristoph Hellwig right.br_startoff = new->br_startoff; 27961abb9e55SChristoph Hellwig right.br_startblock = new->br_startblock; 27971abb9e55SChristoph Hellwig right.br_blockcount += new->br_blockcount; 2798b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &right); 279930f712c9SDave Chinner 28006d04558fSChristoph Hellwig if (cur == NULL) { 280130f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 280230f712c9SDave Chinner } else { 280330f712c9SDave Chinner rval = 0; 2804e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 280530f712c9SDave Chinner if (error) 280630f712c9SDave Chinner goto done; 2807c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 2808a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &right); 280930f712c9SDave Chinner if (error) 281030f712c9SDave Chinner goto done; 281130f712c9SDave Chinner } 281230f712c9SDave Chinner break; 281330f712c9SDave Chinner 281430f712c9SDave Chinner case 0: 281530f712c9SDave Chinner /* 281630f712c9SDave Chinner * New allocation is not contiguous with another 281730f712c9SDave Chinner * real allocation. 281830f712c9SDave Chinner * Insert a new entry. 281930f712c9SDave Chinner */ 28200254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 28216d04558fSChristoph Hellwig XFS_IFORK_NEXT_SET(ip, whichfork, 28226d04558fSChristoph Hellwig XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 28236d04558fSChristoph Hellwig if (cur == NULL) { 282430f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 282530f712c9SDave Chinner } else { 282630f712c9SDave Chinner rval = XFS_ILOG_CORE; 2827e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 282830f712c9SDave Chinner if (error) 282930f712c9SDave Chinner goto done; 2830c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); 28316d04558fSChristoph Hellwig error = xfs_btree_insert(cur, &i); 283230f712c9SDave Chinner if (error) 283330f712c9SDave Chinner goto done; 2834c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 283530f712c9SDave Chinner } 283630f712c9SDave Chinner break; 283730f712c9SDave Chinner } 283830f712c9SDave Chinner 28399c194644SDarrick J. Wong /* add reverse mapping */ 28406d04558fSChristoph Hellwig error = xfs_rmap_map_extent(mp, dfops, ip, whichfork, new); 28419c194644SDarrick J. Wong if (error) 28429c194644SDarrick J. Wong goto done; 28439c194644SDarrick J. Wong 284430f712c9SDave Chinner /* convert to a btree if necessary */ 28456d04558fSChristoph Hellwig if (xfs_bmap_needs_btree(ip, whichfork)) { 284630f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 284730f712c9SDave Chinner 28486d04558fSChristoph Hellwig ASSERT(cur == NULL); 28496d04558fSChristoph Hellwig error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, curp, 285030f712c9SDave Chinner 0, &tmp_logflags, whichfork); 28516d04558fSChristoph Hellwig *logflagsp |= tmp_logflags; 28526d04558fSChristoph Hellwig cur = *curp; 285330f712c9SDave Chinner if (error) 285430f712c9SDave Chinner goto done; 285530f712c9SDave Chinner } 285630f712c9SDave Chinner 285730f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 28586d04558fSChristoph Hellwig if (cur) 28596d04558fSChristoph Hellwig cur->bc_private.b.allocated = 0; 286030f712c9SDave Chinner 28616d04558fSChristoph Hellwig xfs_bmap_check_leaf_extents(cur, ip, whichfork); 286230f712c9SDave Chinner done: 28636d04558fSChristoph Hellwig *logflagsp |= rval; 286430f712c9SDave Chinner return error; 286530f712c9SDave Chinner } 286630f712c9SDave Chinner 286730f712c9SDave Chinner /* 286830f712c9SDave Chinner * Functions used in the extent read, allocate and remove paths 286930f712c9SDave Chinner */ 287030f712c9SDave Chinner 287130f712c9SDave Chinner /* 287230f712c9SDave Chinner * Adjust the size of the new extent based on di_extsize and rt extsize. 287330f712c9SDave Chinner */ 287430f712c9SDave Chinner int 287530f712c9SDave Chinner xfs_bmap_extsize_align( 287630f712c9SDave Chinner xfs_mount_t *mp, 287730f712c9SDave Chinner xfs_bmbt_irec_t *gotp, /* next extent pointer */ 287830f712c9SDave Chinner xfs_bmbt_irec_t *prevp, /* previous extent pointer */ 287930f712c9SDave Chinner xfs_extlen_t extsz, /* align to this extent size */ 288030f712c9SDave Chinner int rt, /* is this a realtime inode? */ 288130f712c9SDave Chinner int eof, /* is extent at end-of-file? */ 288230f712c9SDave Chinner int delay, /* creating delalloc extent? */ 288330f712c9SDave Chinner int convert, /* overwriting unwritten extent? */ 288430f712c9SDave Chinner xfs_fileoff_t *offp, /* in/out: aligned offset */ 288530f712c9SDave Chinner xfs_extlen_t *lenp) /* in/out: aligned length */ 288630f712c9SDave Chinner { 288730f712c9SDave Chinner xfs_fileoff_t orig_off; /* original offset */ 288830f712c9SDave Chinner xfs_extlen_t orig_alen; /* original length */ 288930f712c9SDave Chinner xfs_fileoff_t orig_end; /* original off+len */ 289030f712c9SDave Chinner xfs_fileoff_t nexto; /* next file offset */ 289130f712c9SDave Chinner xfs_fileoff_t prevo; /* previous file offset */ 289230f712c9SDave Chinner xfs_fileoff_t align_off; /* temp for offset */ 289330f712c9SDave Chinner xfs_extlen_t align_alen; /* temp for length */ 289430f712c9SDave Chinner xfs_extlen_t temp; /* temp for calculations */ 289530f712c9SDave Chinner 289630f712c9SDave Chinner if (convert) 289730f712c9SDave Chinner return 0; 289830f712c9SDave Chinner 289930f712c9SDave Chinner orig_off = align_off = *offp; 290030f712c9SDave Chinner orig_alen = align_alen = *lenp; 290130f712c9SDave Chinner orig_end = orig_off + orig_alen; 290230f712c9SDave Chinner 290330f712c9SDave Chinner /* 290430f712c9SDave Chinner * If this request overlaps an existing extent, then don't 290530f712c9SDave Chinner * attempt to perform any additional alignment. 290630f712c9SDave Chinner */ 290730f712c9SDave Chinner if (!delay && !eof && 290830f712c9SDave Chinner (orig_off >= gotp->br_startoff) && 290930f712c9SDave Chinner (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { 291030f712c9SDave Chinner return 0; 291130f712c9SDave Chinner } 291230f712c9SDave Chinner 291330f712c9SDave Chinner /* 291430f712c9SDave Chinner * If the file offset is unaligned vs. the extent size 291530f712c9SDave Chinner * we need to align it. This will be possible unless 291630f712c9SDave Chinner * the file was previously written with a kernel that didn't 291730f712c9SDave Chinner * perform this alignment, or if a truncate shot us in the 291830f712c9SDave Chinner * foot. 291930f712c9SDave Chinner */ 292030f712c9SDave Chinner temp = do_mod(orig_off, extsz); 292130f712c9SDave Chinner if (temp) { 292230f712c9SDave Chinner align_alen += temp; 292330f712c9SDave Chinner align_off -= temp; 292430f712c9SDave Chinner } 29256dea405eSDave Chinner 29266dea405eSDave Chinner /* Same adjustment for the end of the requested area. */ 29276dea405eSDave Chinner temp = (align_alen % extsz); 29286dea405eSDave Chinner if (temp) 292930f712c9SDave Chinner align_alen += extsz - temp; 29306dea405eSDave Chinner 29316dea405eSDave Chinner /* 29326dea405eSDave Chinner * For large extent hint sizes, the aligned extent might be larger than 29336dea405eSDave Chinner * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls 29346dea405eSDave Chinner * the length back under MAXEXTLEN. The outer allocation loops handle 29356dea405eSDave Chinner * short allocation just fine, so it is safe to do this. We only want to 29366dea405eSDave Chinner * do it when we are forced to, though, because it means more allocation 29376dea405eSDave Chinner * operations are required. 29386dea405eSDave Chinner */ 29396dea405eSDave Chinner while (align_alen > MAXEXTLEN) 29406dea405eSDave Chinner align_alen -= extsz; 29416dea405eSDave Chinner ASSERT(align_alen <= MAXEXTLEN); 29426dea405eSDave Chinner 294330f712c9SDave Chinner /* 294430f712c9SDave Chinner * If the previous block overlaps with this proposed allocation 294530f712c9SDave Chinner * then move the start forward without adjusting the length. 294630f712c9SDave Chinner */ 294730f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) { 294830f712c9SDave Chinner if (prevp->br_startblock == HOLESTARTBLOCK) 294930f712c9SDave Chinner prevo = prevp->br_startoff; 295030f712c9SDave Chinner else 295130f712c9SDave Chinner prevo = prevp->br_startoff + prevp->br_blockcount; 295230f712c9SDave Chinner } else 295330f712c9SDave Chinner prevo = 0; 295430f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 295530f712c9SDave Chinner align_off = prevo; 295630f712c9SDave Chinner /* 295730f712c9SDave Chinner * If the next block overlaps with this proposed allocation 295830f712c9SDave Chinner * then move the start back without adjusting the length, 295930f712c9SDave Chinner * but not before offset 0. 296030f712c9SDave Chinner * This may of course make the start overlap previous block, 296130f712c9SDave Chinner * and if we hit the offset 0 limit then the next block 296230f712c9SDave Chinner * can still overlap too. 296330f712c9SDave Chinner */ 296430f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) { 296530f712c9SDave Chinner if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || 296630f712c9SDave Chinner (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) 296730f712c9SDave Chinner nexto = gotp->br_startoff + gotp->br_blockcount; 296830f712c9SDave Chinner else 296930f712c9SDave Chinner nexto = gotp->br_startoff; 297030f712c9SDave Chinner } else 297130f712c9SDave Chinner nexto = NULLFILEOFF; 297230f712c9SDave Chinner if (!eof && 297330f712c9SDave Chinner align_off + align_alen != orig_end && 297430f712c9SDave Chinner align_off + align_alen > nexto) 297530f712c9SDave Chinner align_off = nexto > align_alen ? nexto - align_alen : 0; 297630f712c9SDave Chinner /* 297730f712c9SDave Chinner * If we're now overlapping the next or previous extent that 297830f712c9SDave Chinner * means we can't fit an extsz piece in this hole. Just move 297930f712c9SDave Chinner * the start forward to the first valid spot and set 298030f712c9SDave Chinner * the length so we hit the end. 298130f712c9SDave Chinner */ 298230f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 298330f712c9SDave Chinner align_off = prevo; 298430f712c9SDave Chinner if (align_off + align_alen != orig_end && 298530f712c9SDave Chinner align_off + align_alen > nexto && 298630f712c9SDave Chinner nexto != NULLFILEOFF) { 298730f712c9SDave Chinner ASSERT(nexto > prevo); 298830f712c9SDave Chinner align_alen = nexto - align_off; 298930f712c9SDave Chinner } 299030f712c9SDave Chinner 299130f712c9SDave Chinner /* 299230f712c9SDave Chinner * If realtime, and the result isn't a multiple of the realtime 299330f712c9SDave Chinner * extent size we need to remove blocks until it is. 299430f712c9SDave Chinner */ 299530f712c9SDave Chinner if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { 299630f712c9SDave Chinner /* 299730f712c9SDave Chinner * We're not covering the original request, or 299830f712c9SDave Chinner * we won't be able to once we fix the length. 299930f712c9SDave Chinner */ 300030f712c9SDave Chinner if (orig_off < align_off || 300130f712c9SDave Chinner orig_end > align_off + align_alen || 300230f712c9SDave Chinner align_alen - temp < orig_alen) 30032451337dSDave Chinner return -EINVAL; 300430f712c9SDave Chinner /* 300530f712c9SDave Chinner * Try to fix it by moving the start up. 300630f712c9SDave Chinner */ 300730f712c9SDave Chinner if (align_off + temp <= orig_off) { 300830f712c9SDave Chinner align_alen -= temp; 300930f712c9SDave Chinner align_off += temp; 301030f712c9SDave Chinner } 301130f712c9SDave Chinner /* 301230f712c9SDave Chinner * Try to fix it by moving the end in. 301330f712c9SDave Chinner */ 301430f712c9SDave Chinner else if (align_off + align_alen - temp >= orig_end) 301530f712c9SDave Chinner align_alen -= temp; 301630f712c9SDave Chinner /* 301730f712c9SDave Chinner * Set the start to the minimum then trim the length. 301830f712c9SDave Chinner */ 301930f712c9SDave Chinner else { 302030f712c9SDave Chinner align_alen -= orig_off - align_off; 302130f712c9SDave Chinner align_off = orig_off; 302230f712c9SDave Chinner align_alen -= align_alen % mp->m_sb.sb_rextsize; 302330f712c9SDave Chinner } 302430f712c9SDave Chinner /* 302530f712c9SDave Chinner * Result doesn't cover the request, fail it. 302630f712c9SDave Chinner */ 302730f712c9SDave Chinner if (orig_off < align_off || orig_end > align_off + align_alen) 30282451337dSDave Chinner return -EINVAL; 302930f712c9SDave Chinner } else { 303030f712c9SDave Chinner ASSERT(orig_off >= align_off); 30316dea405eSDave Chinner /* see MAXEXTLEN handling above */ 30326dea405eSDave Chinner ASSERT(orig_end <= align_off + align_alen || 30336dea405eSDave Chinner align_alen + extsz > MAXEXTLEN); 303430f712c9SDave Chinner } 303530f712c9SDave Chinner 303630f712c9SDave Chinner #ifdef DEBUG 303730f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) 303830f712c9SDave Chinner ASSERT(align_off + align_alen <= gotp->br_startoff); 303930f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) 304030f712c9SDave Chinner ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); 304130f712c9SDave Chinner #endif 304230f712c9SDave Chinner 304330f712c9SDave Chinner *lenp = align_alen; 304430f712c9SDave Chinner *offp = align_off; 304530f712c9SDave Chinner return 0; 304630f712c9SDave Chinner } 304730f712c9SDave Chinner 304830f712c9SDave Chinner #define XFS_ALLOC_GAP_UNITS 4 304930f712c9SDave Chinner 305030f712c9SDave Chinner void 305130f712c9SDave Chinner xfs_bmap_adjacent( 305230f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 305330f712c9SDave Chinner { 305430f712c9SDave Chinner xfs_fsblock_t adjust; /* adjustment to block numbers */ 305530f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 305630f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 305730f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 305830f712c9SDave Chinner int rt; /* true if inode is realtime */ 305930f712c9SDave Chinner 306030f712c9SDave Chinner #define ISVALID(x,y) \ 306130f712c9SDave Chinner (rt ? \ 306230f712c9SDave Chinner (x) < mp->m_sb.sb_rblocks : \ 306330f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ 306430f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ 306530f712c9SDave Chinner XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) 306630f712c9SDave Chinner 306730f712c9SDave Chinner mp = ap->ip->i_mount; 306830f712c9SDave Chinner nullfb = *ap->firstblock == NULLFSBLOCK; 3069292378edSDave Chinner rt = XFS_IS_REALTIME_INODE(ap->ip) && 3070292378edSDave Chinner xfs_alloc_is_userdata(ap->datatype); 307130f712c9SDave Chinner fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); 307230f712c9SDave Chinner /* 307330f712c9SDave Chinner * If allocating at eof, and there's a previous real block, 307430f712c9SDave Chinner * try to use its last block as our starting point. 307530f712c9SDave Chinner */ 307630f712c9SDave Chinner if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && 307730f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 307830f712c9SDave Chinner ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, 307930f712c9SDave Chinner ap->prev.br_startblock)) { 308030f712c9SDave Chinner ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; 308130f712c9SDave Chinner /* 308230f712c9SDave Chinner * Adjust for the gap between prevp and us. 308330f712c9SDave Chinner */ 308430f712c9SDave Chinner adjust = ap->offset - 308530f712c9SDave Chinner (ap->prev.br_startoff + ap->prev.br_blockcount); 308630f712c9SDave Chinner if (adjust && 308730f712c9SDave Chinner ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) 308830f712c9SDave Chinner ap->blkno += adjust; 308930f712c9SDave Chinner } 309030f712c9SDave Chinner /* 309130f712c9SDave Chinner * If not at eof, then compare the two neighbor blocks. 309230f712c9SDave Chinner * Figure out whether either one gives us a good starting point, 309330f712c9SDave Chinner * and pick the better one. 309430f712c9SDave Chinner */ 309530f712c9SDave Chinner else if (!ap->eof) { 309630f712c9SDave Chinner xfs_fsblock_t gotbno; /* right side block number */ 309730f712c9SDave Chinner xfs_fsblock_t gotdiff=0; /* right side difference */ 309830f712c9SDave Chinner xfs_fsblock_t prevbno; /* left side block number */ 309930f712c9SDave Chinner xfs_fsblock_t prevdiff=0; /* left side difference */ 310030f712c9SDave Chinner 310130f712c9SDave Chinner /* 310230f712c9SDave Chinner * If there's a previous (left) block, select a requested 310330f712c9SDave Chinner * start block based on it. 310430f712c9SDave Chinner */ 310530f712c9SDave Chinner if (ap->prev.br_startoff != NULLFILEOFF && 310630f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 310730f712c9SDave Chinner (prevbno = ap->prev.br_startblock + 310830f712c9SDave Chinner ap->prev.br_blockcount) && 310930f712c9SDave Chinner ISVALID(prevbno, ap->prev.br_startblock)) { 311030f712c9SDave Chinner /* 311130f712c9SDave Chinner * Calculate gap to end of previous block. 311230f712c9SDave Chinner */ 311330f712c9SDave Chinner adjust = prevdiff = ap->offset - 311430f712c9SDave Chinner (ap->prev.br_startoff + 311530f712c9SDave Chinner ap->prev.br_blockcount); 311630f712c9SDave Chinner /* 311730f712c9SDave Chinner * Figure the startblock based on the previous block's 311830f712c9SDave Chinner * end and the gap size. 311930f712c9SDave Chinner * Heuristic! 312030f712c9SDave Chinner * If the gap is large relative to the piece we're 312130f712c9SDave Chinner * allocating, or using it gives us an invalid block 312230f712c9SDave Chinner * number, then just use the end of the previous block. 312330f712c9SDave Chinner */ 312430f712c9SDave Chinner if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 312530f712c9SDave Chinner ISVALID(prevbno + prevdiff, 312630f712c9SDave Chinner ap->prev.br_startblock)) 312730f712c9SDave Chinner prevbno += adjust; 312830f712c9SDave Chinner else 312930f712c9SDave Chinner prevdiff += adjust; 313030f712c9SDave Chinner /* 313130f712c9SDave Chinner * If the firstblock forbids it, can't use it, 313230f712c9SDave Chinner * must use default. 313330f712c9SDave Chinner */ 313430f712c9SDave Chinner if (!rt && !nullfb && 313530f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) 313630f712c9SDave Chinner prevbno = NULLFSBLOCK; 313730f712c9SDave Chinner } 313830f712c9SDave Chinner /* 313930f712c9SDave Chinner * No previous block or can't follow it, just default. 314030f712c9SDave Chinner */ 314130f712c9SDave Chinner else 314230f712c9SDave Chinner prevbno = NULLFSBLOCK; 314330f712c9SDave Chinner /* 314430f712c9SDave Chinner * If there's a following (right) block, select a requested 314530f712c9SDave Chinner * start block based on it. 314630f712c9SDave Chinner */ 314730f712c9SDave Chinner if (!isnullstartblock(ap->got.br_startblock)) { 314830f712c9SDave Chinner /* 314930f712c9SDave Chinner * Calculate gap to start of next block. 315030f712c9SDave Chinner */ 315130f712c9SDave Chinner adjust = gotdiff = ap->got.br_startoff - ap->offset; 315230f712c9SDave Chinner /* 315330f712c9SDave Chinner * Figure the startblock based on the next block's 315430f712c9SDave Chinner * start and the gap size. 315530f712c9SDave Chinner */ 315630f712c9SDave Chinner gotbno = ap->got.br_startblock; 315730f712c9SDave Chinner /* 315830f712c9SDave Chinner * Heuristic! 315930f712c9SDave Chinner * If the gap is large relative to the piece we're 316030f712c9SDave Chinner * allocating, or using it gives us an invalid block 316130f712c9SDave Chinner * number, then just use the start of the next block 316230f712c9SDave Chinner * offset by our length. 316330f712c9SDave Chinner */ 316430f712c9SDave Chinner if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 316530f712c9SDave Chinner ISVALID(gotbno - gotdiff, gotbno)) 316630f712c9SDave Chinner gotbno -= adjust; 316730f712c9SDave Chinner else if (ISVALID(gotbno - ap->length, gotbno)) { 316830f712c9SDave Chinner gotbno -= ap->length; 316930f712c9SDave Chinner gotdiff += adjust - ap->length; 317030f712c9SDave Chinner } else 317130f712c9SDave Chinner gotdiff += adjust; 317230f712c9SDave Chinner /* 317330f712c9SDave Chinner * If the firstblock forbids it, can't use it, 317430f712c9SDave Chinner * must use default. 317530f712c9SDave Chinner */ 317630f712c9SDave Chinner if (!rt && !nullfb && 317730f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) 317830f712c9SDave Chinner gotbno = NULLFSBLOCK; 317930f712c9SDave Chinner } 318030f712c9SDave Chinner /* 318130f712c9SDave Chinner * No next block, just default. 318230f712c9SDave Chinner */ 318330f712c9SDave Chinner else 318430f712c9SDave Chinner gotbno = NULLFSBLOCK; 318530f712c9SDave Chinner /* 318630f712c9SDave Chinner * If both valid, pick the better one, else the only good 318730f712c9SDave Chinner * one, else ap->blkno is already set (to 0 or the inode block). 318830f712c9SDave Chinner */ 318930f712c9SDave Chinner if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) 319030f712c9SDave Chinner ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; 319130f712c9SDave Chinner else if (prevbno != NULLFSBLOCK) 319230f712c9SDave Chinner ap->blkno = prevbno; 319330f712c9SDave Chinner else if (gotbno != NULLFSBLOCK) 319430f712c9SDave Chinner ap->blkno = gotbno; 319530f712c9SDave Chinner } 319630f712c9SDave Chinner #undef ISVALID 319730f712c9SDave Chinner } 319830f712c9SDave Chinner 319930f712c9SDave Chinner static int 320030f712c9SDave Chinner xfs_bmap_longest_free_extent( 320130f712c9SDave Chinner struct xfs_trans *tp, 320230f712c9SDave Chinner xfs_agnumber_t ag, 320330f712c9SDave Chinner xfs_extlen_t *blen, 320430f712c9SDave Chinner int *notinit) 320530f712c9SDave Chinner { 320630f712c9SDave Chinner struct xfs_mount *mp = tp->t_mountp; 320730f712c9SDave Chinner struct xfs_perag *pag; 320830f712c9SDave Chinner xfs_extlen_t longest; 320930f712c9SDave Chinner int error = 0; 321030f712c9SDave Chinner 321130f712c9SDave Chinner pag = xfs_perag_get(mp, ag); 321230f712c9SDave Chinner if (!pag->pagf_init) { 321330f712c9SDave Chinner error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); 321430f712c9SDave Chinner if (error) 321530f712c9SDave Chinner goto out; 321630f712c9SDave Chinner 321730f712c9SDave Chinner if (!pag->pagf_init) { 321830f712c9SDave Chinner *notinit = 1; 321930f712c9SDave Chinner goto out; 322030f712c9SDave Chinner } 322130f712c9SDave Chinner } 322230f712c9SDave Chinner 322350adbcb4SDave Chinner longest = xfs_alloc_longest_free_extent(mp, pag, 32243fd129b6SDarrick J. Wong xfs_alloc_min_freelist(mp, pag), 32253fd129b6SDarrick J. Wong xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE)); 322630f712c9SDave Chinner if (*blen < longest) 322730f712c9SDave Chinner *blen = longest; 322830f712c9SDave Chinner 322930f712c9SDave Chinner out: 323030f712c9SDave Chinner xfs_perag_put(pag); 323130f712c9SDave Chinner return error; 323230f712c9SDave Chinner } 323330f712c9SDave Chinner 323430f712c9SDave Chinner static void 323530f712c9SDave Chinner xfs_bmap_select_minlen( 323630f712c9SDave Chinner struct xfs_bmalloca *ap, 323730f712c9SDave Chinner struct xfs_alloc_arg *args, 323830f712c9SDave Chinner xfs_extlen_t *blen, 323930f712c9SDave Chinner int notinit) 324030f712c9SDave Chinner { 324130f712c9SDave Chinner if (notinit || *blen < ap->minlen) { 324230f712c9SDave Chinner /* 324330f712c9SDave Chinner * Since we did a BUF_TRYLOCK above, it is possible that 324430f712c9SDave Chinner * there is space for this request. 324530f712c9SDave Chinner */ 324630f712c9SDave Chinner args->minlen = ap->minlen; 324730f712c9SDave Chinner } else if (*blen < args->maxlen) { 324830f712c9SDave Chinner /* 324930f712c9SDave Chinner * If the best seen length is less than the request length, 325030f712c9SDave Chinner * use the best as the minimum. 325130f712c9SDave Chinner */ 325230f712c9SDave Chinner args->minlen = *blen; 325330f712c9SDave Chinner } else { 325430f712c9SDave Chinner /* 325530f712c9SDave Chinner * Otherwise we've seen an extent as big as maxlen, use that 325630f712c9SDave Chinner * as the minimum. 325730f712c9SDave Chinner */ 325830f712c9SDave Chinner args->minlen = args->maxlen; 325930f712c9SDave Chinner } 326030f712c9SDave Chinner } 326130f712c9SDave Chinner 326230f712c9SDave Chinner STATIC int 326330f712c9SDave Chinner xfs_bmap_btalloc_nullfb( 326430f712c9SDave Chinner struct xfs_bmalloca *ap, 326530f712c9SDave Chinner struct xfs_alloc_arg *args, 326630f712c9SDave Chinner xfs_extlen_t *blen) 326730f712c9SDave Chinner { 326830f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 326930f712c9SDave Chinner xfs_agnumber_t ag, startag; 327030f712c9SDave Chinner int notinit = 0; 327130f712c9SDave Chinner int error; 327230f712c9SDave Chinner 327330f712c9SDave Chinner args->type = XFS_ALLOCTYPE_START_BNO; 327430f712c9SDave Chinner args->total = ap->total; 327530f712c9SDave Chinner 327630f712c9SDave Chinner startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 327730f712c9SDave Chinner if (startag == NULLAGNUMBER) 327830f712c9SDave Chinner startag = ag = 0; 327930f712c9SDave Chinner 328030f712c9SDave Chinner while (*blen < args->maxlen) { 328130f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 328230f712c9SDave Chinner ¬init); 328330f712c9SDave Chinner if (error) 328430f712c9SDave Chinner return error; 328530f712c9SDave Chinner 328630f712c9SDave Chinner if (++ag == mp->m_sb.sb_agcount) 328730f712c9SDave Chinner ag = 0; 328830f712c9SDave Chinner if (ag == startag) 328930f712c9SDave Chinner break; 329030f712c9SDave Chinner } 329130f712c9SDave Chinner 329230f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 329330f712c9SDave Chinner return 0; 329430f712c9SDave Chinner } 329530f712c9SDave Chinner 329630f712c9SDave Chinner STATIC int 329730f712c9SDave Chinner xfs_bmap_btalloc_filestreams( 329830f712c9SDave Chinner struct xfs_bmalloca *ap, 329930f712c9SDave Chinner struct xfs_alloc_arg *args, 330030f712c9SDave Chinner xfs_extlen_t *blen) 330130f712c9SDave Chinner { 330230f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 330330f712c9SDave Chinner xfs_agnumber_t ag; 330430f712c9SDave Chinner int notinit = 0; 330530f712c9SDave Chinner int error; 330630f712c9SDave Chinner 330730f712c9SDave Chinner args->type = XFS_ALLOCTYPE_NEAR_BNO; 330830f712c9SDave Chinner args->total = ap->total; 330930f712c9SDave Chinner 331030f712c9SDave Chinner ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 331130f712c9SDave Chinner if (ag == NULLAGNUMBER) 331230f712c9SDave Chinner ag = 0; 331330f712c9SDave Chinner 331430f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); 331530f712c9SDave Chinner if (error) 331630f712c9SDave Chinner return error; 331730f712c9SDave Chinner 331830f712c9SDave Chinner if (*blen < args->maxlen) { 331930f712c9SDave Chinner error = xfs_filestream_new_ag(ap, &ag); 332030f712c9SDave Chinner if (error) 332130f712c9SDave Chinner return error; 332230f712c9SDave Chinner 332330f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 332430f712c9SDave Chinner ¬init); 332530f712c9SDave Chinner if (error) 332630f712c9SDave Chinner return error; 332730f712c9SDave Chinner 332830f712c9SDave Chinner } 332930f712c9SDave Chinner 333030f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 333130f712c9SDave Chinner 333230f712c9SDave Chinner /* 333330f712c9SDave Chinner * Set the failure fallback case to look in the selected AG as stream 333430f712c9SDave Chinner * may have moved. 333530f712c9SDave Chinner */ 333630f712c9SDave Chinner ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); 333730f712c9SDave Chinner return 0; 333830f712c9SDave Chinner } 333930f712c9SDave Chinner 334030f712c9SDave Chinner STATIC int 334130f712c9SDave Chinner xfs_bmap_btalloc( 334230f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 334330f712c9SDave Chinner { 334430f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 334530f712c9SDave Chinner xfs_alloctype_t atype = 0; /* type for allocation routines */ 3346292378edSDave Chinner xfs_extlen_t align = 0; /* minimum allocation alignment */ 334730f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 334830f712c9SDave Chinner xfs_agnumber_t ag; 334930f712c9SDave Chinner xfs_alloc_arg_t args; 335030f712c9SDave Chinner xfs_extlen_t blen; 335130f712c9SDave Chinner xfs_extlen_t nextminlen = 0; 335230f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 335330f712c9SDave Chinner int isaligned; 335430f712c9SDave Chinner int tryagain; 335530f712c9SDave Chinner int error; 335630f712c9SDave Chinner int stripe_align; 335730f712c9SDave Chinner 335830f712c9SDave Chinner ASSERT(ap->length); 335930f712c9SDave Chinner 336030f712c9SDave Chinner mp = ap->ip->i_mount; 336130f712c9SDave Chinner 336230f712c9SDave Chinner /* stripe alignment for allocation is determined by mount parameters */ 336330f712c9SDave Chinner stripe_align = 0; 336430f712c9SDave Chinner if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) 336530f712c9SDave Chinner stripe_align = mp->m_swidth; 336630f712c9SDave Chinner else if (mp->m_dalign) 336730f712c9SDave Chinner stripe_align = mp->m_dalign; 336830f712c9SDave Chinner 3369f7ca3522SDarrick J. Wong if (ap->flags & XFS_BMAPI_COWFORK) 3370f7ca3522SDarrick J. Wong align = xfs_get_cowextsz_hint(ap->ip); 3371f7ca3522SDarrick J. Wong else if (xfs_alloc_is_userdata(ap->datatype)) 3372292378edSDave Chinner align = xfs_get_extsz_hint(ap->ip); 3373493611ebSChristoph Hellwig if (align) { 337430f712c9SDave Chinner error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, 337530f712c9SDave Chinner align, 0, ap->eof, 0, ap->conv, 337630f712c9SDave Chinner &ap->offset, &ap->length); 337730f712c9SDave Chinner ASSERT(!error); 337830f712c9SDave Chinner ASSERT(ap->length); 337930f712c9SDave Chinner } 338030f712c9SDave Chinner 338130f712c9SDave Chinner 338230f712c9SDave Chinner nullfb = *ap->firstblock == NULLFSBLOCK; 338330f712c9SDave Chinner fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); 338430f712c9SDave Chinner if (nullfb) { 3385292378edSDave Chinner if (xfs_alloc_is_userdata(ap->datatype) && 3386292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) { 338730f712c9SDave Chinner ag = xfs_filestream_lookup_ag(ap->ip); 338830f712c9SDave Chinner ag = (ag != NULLAGNUMBER) ? ag : 0; 338930f712c9SDave Chinner ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); 339030f712c9SDave Chinner } else { 339130f712c9SDave Chinner ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); 339230f712c9SDave Chinner } 339330f712c9SDave Chinner } else 339430f712c9SDave Chinner ap->blkno = *ap->firstblock; 339530f712c9SDave Chinner 339630f712c9SDave Chinner xfs_bmap_adjacent(ap); 339730f712c9SDave Chinner 339830f712c9SDave Chinner /* 339930f712c9SDave Chinner * If allowed, use ap->blkno; otherwise must use firstblock since 340030f712c9SDave Chinner * it's in the right allocation group. 340130f712c9SDave Chinner */ 340230f712c9SDave Chinner if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) 340330f712c9SDave Chinner ; 340430f712c9SDave Chinner else 340530f712c9SDave Chinner ap->blkno = *ap->firstblock; 340630f712c9SDave Chinner /* 340730f712c9SDave Chinner * Normal allocation, done through xfs_alloc_vextent. 340830f712c9SDave Chinner */ 340930f712c9SDave Chinner tryagain = isaligned = 0; 341030f712c9SDave Chinner memset(&args, 0, sizeof(args)); 341130f712c9SDave Chinner args.tp = ap->tp; 341230f712c9SDave Chinner args.mp = mp; 341330f712c9SDave Chinner args.fsbno = ap->blkno; 3414340785ccSDarrick J. Wong xfs_rmap_skip_owner_update(&args.oinfo); 341530f712c9SDave Chinner 341630f712c9SDave Chinner /* Trim the allocation back to the maximum an AG can fit. */ 341752548852SDarrick J. Wong args.maxlen = MIN(ap->length, mp->m_ag_max_usable); 341830f712c9SDave Chinner args.firstblock = *ap->firstblock; 341930f712c9SDave Chinner blen = 0; 342030f712c9SDave Chinner if (nullfb) { 342130f712c9SDave Chinner /* 342230f712c9SDave Chinner * Search for an allocation group with a single extent large 342330f712c9SDave Chinner * enough for the request. If one isn't found, then adjust 342430f712c9SDave Chinner * the minimum allocation size to the largest space found. 342530f712c9SDave Chinner */ 3426292378edSDave Chinner if (xfs_alloc_is_userdata(ap->datatype) && 3427292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) 342830f712c9SDave Chinner error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); 342930f712c9SDave Chinner else 343030f712c9SDave Chinner error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); 343130f712c9SDave Chinner if (error) 343230f712c9SDave Chinner return error; 34332c3234d1SDarrick J. Wong } else if (ap->dfops->dop_low) { 343430f712c9SDave Chinner if (xfs_inode_is_filestream(ap->ip)) 343530f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 343630f712c9SDave Chinner else 343730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 343830f712c9SDave Chinner args.total = args.minlen = ap->minlen; 343930f712c9SDave Chinner } else { 344030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 344130f712c9SDave Chinner args.total = ap->total; 344230f712c9SDave Chinner args.minlen = ap->minlen; 344330f712c9SDave Chinner } 344430f712c9SDave Chinner /* apply extent size hints if obtained earlier */ 3445493611ebSChristoph Hellwig if (align) { 344630f712c9SDave Chinner args.prod = align; 344730f712c9SDave Chinner if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) 344830f712c9SDave Chinner args.mod = (xfs_extlen_t)(args.prod - args.mod); 344909cbfeafSKirill A. Shutemov } else if (mp->m_sb.sb_blocksize >= PAGE_SIZE) { 345030f712c9SDave Chinner args.prod = 1; 345130f712c9SDave Chinner args.mod = 0; 345230f712c9SDave Chinner } else { 345309cbfeafSKirill A. Shutemov args.prod = PAGE_SIZE >> mp->m_sb.sb_blocklog; 345430f712c9SDave Chinner if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) 345530f712c9SDave Chinner args.mod = (xfs_extlen_t)(args.prod - args.mod); 345630f712c9SDave Chinner } 345730f712c9SDave Chinner /* 345830f712c9SDave Chinner * If we are not low on available data blocks, and the 345930f712c9SDave Chinner * underlying logical volume manager is a stripe, and 346030f712c9SDave Chinner * the file offset is zero then try to allocate data 346130f712c9SDave Chinner * blocks on stripe unit boundary. 346230f712c9SDave Chinner * NOTE: ap->aeof is only set if the allocation length 346330f712c9SDave Chinner * is >= the stripe unit and the allocation offset is 346430f712c9SDave Chinner * at the end of file. 346530f712c9SDave Chinner */ 34662c3234d1SDarrick J. Wong if (!ap->dfops->dop_low && ap->aeof) { 346730f712c9SDave Chinner if (!ap->offset) { 346830f712c9SDave Chinner args.alignment = stripe_align; 346930f712c9SDave Chinner atype = args.type; 347030f712c9SDave Chinner isaligned = 1; 347130f712c9SDave Chinner /* 347230f712c9SDave Chinner * Adjust for alignment 347330f712c9SDave Chinner */ 347430f712c9SDave Chinner if (blen > args.alignment && blen <= args.maxlen) 347530f712c9SDave Chinner args.minlen = blen - args.alignment; 347630f712c9SDave Chinner args.minalignslop = 0; 347730f712c9SDave Chinner } else { 347830f712c9SDave Chinner /* 347930f712c9SDave Chinner * First try an exact bno allocation. 348030f712c9SDave Chinner * If it fails then do a near or start bno 348130f712c9SDave Chinner * allocation with alignment turned on. 348230f712c9SDave Chinner */ 348330f712c9SDave Chinner atype = args.type; 348430f712c9SDave Chinner tryagain = 1; 348530f712c9SDave Chinner args.type = XFS_ALLOCTYPE_THIS_BNO; 348630f712c9SDave Chinner args.alignment = 1; 348730f712c9SDave Chinner /* 348830f712c9SDave Chinner * Compute the minlen+alignment for the 348930f712c9SDave Chinner * next case. Set slop so that the value 349030f712c9SDave Chinner * of minlen+alignment+slop doesn't go up 349130f712c9SDave Chinner * between the calls. 349230f712c9SDave Chinner */ 349330f712c9SDave Chinner if (blen > stripe_align && blen <= args.maxlen) 349430f712c9SDave Chinner nextminlen = blen - stripe_align; 349530f712c9SDave Chinner else 349630f712c9SDave Chinner nextminlen = args.minlen; 349730f712c9SDave Chinner if (nextminlen + stripe_align > args.minlen + 1) 349830f712c9SDave Chinner args.minalignslop = 349930f712c9SDave Chinner nextminlen + stripe_align - 350030f712c9SDave Chinner args.minlen - 1; 350130f712c9SDave Chinner else 350230f712c9SDave Chinner args.minalignslop = 0; 350330f712c9SDave Chinner } 350430f712c9SDave Chinner } else { 350530f712c9SDave Chinner args.alignment = 1; 350630f712c9SDave Chinner args.minalignslop = 0; 350730f712c9SDave Chinner } 350830f712c9SDave Chinner args.minleft = ap->minleft; 350930f712c9SDave Chinner args.wasdel = ap->wasdel; 35103fd129b6SDarrick J. Wong args.resv = XFS_AG_RESV_NONE; 3511292378edSDave Chinner args.datatype = ap->datatype; 3512292378edSDave Chinner if (ap->datatype & XFS_ALLOC_USERDATA_ZERO) 35133fbbbea3SDave Chinner args.ip = ap->ip; 35143fbbbea3SDave Chinner 35153fbbbea3SDave Chinner error = xfs_alloc_vextent(&args); 35163fbbbea3SDave Chinner if (error) 351730f712c9SDave Chinner return error; 35183fbbbea3SDave Chinner 351930f712c9SDave Chinner if (tryagain && args.fsbno == NULLFSBLOCK) { 352030f712c9SDave Chinner /* 352130f712c9SDave Chinner * Exact allocation failed. Now try with alignment 352230f712c9SDave Chinner * turned on. 352330f712c9SDave Chinner */ 352430f712c9SDave Chinner args.type = atype; 352530f712c9SDave Chinner args.fsbno = ap->blkno; 352630f712c9SDave Chinner args.alignment = stripe_align; 352730f712c9SDave Chinner args.minlen = nextminlen; 352830f712c9SDave Chinner args.minalignslop = 0; 352930f712c9SDave Chinner isaligned = 1; 353030f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 353130f712c9SDave Chinner return error; 353230f712c9SDave Chinner } 353330f712c9SDave Chinner if (isaligned && args.fsbno == NULLFSBLOCK) { 353430f712c9SDave Chinner /* 353530f712c9SDave Chinner * allocation failed, so turn off alignment and 353630f712c9SDave Chinner * try again. 353730f712c9SDave Chinner */ 353830f712c9SDave Chinner args.type = atype; 353930f712c9SDave Chinner args.fsbno = ap->blkno; 354030f712c9SDave Chinner args.alignment = 0; 354130f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 354230f712c9SDave Chinner return error; 354330f712c9SDave Chinner } 354430f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb && 354530f712c9SDave Chinner args.minlen > ap->minlen) { 354630f712c9SDave Chinner args.minlen = ap->minlen; 354730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 354830f712c9SDave Chinner args.fsbno = ap->blkno; 354930f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 355030f712c9SDave Chinner return error; 355130f712c9SDave Chinner } 355230f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb) { 355330f712c9SDave Chinner args.fsbno = 0; 355430f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 355530f712c9SDave Chinner args.total = ap->minlen; 355630f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 355730f712c9SDave Chinner return error; 35582c3234d1SDarrick J. Wong ap->dfops->dop_low = true; 355930f712c9SDave Chinner } 356030f712c9SDave Chinner if (args.fsbno != NULLFSBLOCK) { 356130f712c9SDave Chinner /* 356230f712c9SDave Chinner * check the allocation happened at the same or higher AG than 356330f712c9SDave Chinner * the first block that was allocated. 356430f712c9SDave Chinner */ 356530f712c9SDave Chinner ASSERT(*ap->firstblock == NULLFSBLOCK || 3566410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, *ap->firstblock) <= 3567410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, args.fsbno)); 356830f712c9SDave Chinner 356930f712c9SDave Chinner ap->blkno = args.fsbno; 357030f712c9SDave Chinner if (*ap->firstblock == NULLFSBLOCK) 357130f712c9SDave Chinner *ap->firstblock = args.fsbno; 3572410d17f6SChristoph Hellwig ASSERT(nullfb || fb_agno <= args.agno); 357330f712c9SDave Chinner ap->length = args.len; 357460b4984fSDarrick J. Wong if (!(ap->flags & XFS_BMAPI_COWFORK)) 357530f712c9SDave Chinner ap->ip->i_d.di_nblocks += args.len; 357630f712c9SDave Chinner xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); 357730f712c9SDave Chinner if (ap->wasdel) 357830f712c9SDave Chinner ap->ip->i_delayed_blks -= args.len; 357930f712c9SDave Chinner /* 358030f712c9SDave Chinner * Adjust the disk quota also. This was reserved 358130f712c9SDave Chinner * earlier. 358230f712c9SDave Chinner */ 358330f712c9SDave Chinner xfs_trans_mod_dquot_byino(ap->tp, ap->ip, 358430f712c9SDave Chinner ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : 358530f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 358630f712c9SDave Chinner (long) args.len); 358730f712c9SDave Chinner } else { 358830f712c9SDave Chinner ap->blkno = NULLFSBLOCK; 358930f712c9SDave Chinner ap->length = 0; 359030f712c9SDave Chinner } 359130f712c9SDave Chinner return 0; 359230f712c9SDave Chinner } 359330f712c9SDave Chinner 359430f712c9SDave Chinner /* 359530f712c9SDave Chinner * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. 359630f712c9SDave Chinner * It figures out where to ask the underlying allocator to put the new extent. 359730f712c9SDave Chinner */ 359830f712c9SDave Chinner STATIC int 359930f712c9SDave Chinner xfs_bmap_alloc( 360030f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 360130f712c9SDave Chinner { 3602292378edSDave Chinner if (XFS_IS_REALTIME_INODE(ap->ip) && 3603292378edSDave Chinner xfs_alloc_is_userdata(ap->datatype)) 360430f712c9SDave Chinner return xfs_bmap_rtalloc(ap); 360530f712c9SDave Chinner return xfs_bmap_btalloc(ap); 360630f712c9SDave Chinner } 360730f712c9SDave Chinner 36080a0af28cSDarrick J. Wong /* Trim extent to fit a logical block range. */ 36090a0af28cSDarrick J. Wong void 36100a0af28cSDarrick J. Wong xfs_trim_extent( 36110a0af28cSDarrick J. Wong struct xfs_bmbt_irec *irec, 36120a0af28cSDarrick J. Wong xfs_fileoff_t bno, 36130a0af28cSDarrick J. Wong xfs_filblks_t len) 36140a0af28cSDarrick J. Wong { 36150a0af28cSDarrick J. Wong xfs_fileoff_t distance; 36160a0af28cSDarrick J. Wong xfs_fileoff_t end = bno + len; 36170a0af28cSDarrick J. Wong 36180a0af28cSDarrick J. Wong if (irec->br_startoff + irec->br_blockcount <= bno || 36190a0af28cSDarrick J. Wong irec->br_startoff >= end) { 36200a0af28cSDarrick J. Wong irec->br_blockcount = 0; 36210a0af28cSDarrick J. Wong return; 36220a0af28cSDarrick J. Wong } 36230a0af28cSDarrick J. Wong 36240a0af28cSDarrick J. Wong if (irec->br_startoff < bno) { 36250a0af28cSDarrick J. Wong distance = bno - irec->br_startoff; 36260a0af28cSDarrick J. Wong if (isnullstartblock(irec->br_startblock)) 36270a0af28cSDarrick J. Wong irec->br_startblock = DELAYSTARTBLOCK; 36280a0af28cSDarrick J. Wong if (irec->br_startblock != DELAYSTARTBLOCK && 36290a0af28cSDarrick J. Wong irec->br_startblock != HOLESTARTBLOCK) 36300a0af28cSDarrick J. Wong irec->br_startblock += distance; 36310a0af28cSDarrick J. Wong irec->br_startoff += distance; 36320a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 36330a0af28cSDarrick J. Wong } 36340a0af28cSDarrick J. Wong 36350a0af28cSDarrick J. Wong if (end < irec->br_startoff + irec->br_blockcount) { 36360a0af28cSDarrick J. Wong distance = irec->br_startoff + irec->br_blockcount - end; 36370a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 36380a0af28cSDarrick J. Wong } 36390a0af28cSDarrick J. Wong } 36400a0af28cSDarrick J. Wong 364140214d12SBrian Foster /* trim extent to within eof */ 364240214d12SBrian Foster void 364340214d12SBrian Foster xfs_trim_extent_eof( 364440214d12SBrian Foster struct xfs_bmbt_irec *irec, 364540214d12SBrian Foster struct xfs_inode *ip) 364640214d12SBrian Foster 364740214d12SBrian Foster { 364840214d12SBrian Foster xfs_trim_extent(irec, 0, XFS_B_TO_FSB(ip->i_mount, 364940214d12SBrian Foster i_size_read(VFS_I(ip)))); 365040214d12SBrian Foster } 365140214d12SBrian Foster 365230f712c9SDave Chinner /* 365330f712c9SDave Chinner * Trim the returned map to the required bounds 365430f712c9SDave Chinner */ 365530f712c9SDave Chinner STATIC void 365630f712c9SDave Chinner xfs_bmapi_trim_map( 365730f712c9SDave Chinner struct xfs_bmbt_irec *mval, 365830f712c9SDave Chinner struct xfs_bmbt_irec *got, 365930f712c9SDave Chinner xfs_fileoff_t *bno, 366030f712c9SDave Chinner xfs_filblks_t len, 366130f712c9SDave Chinner xfs_fileoff_t obno, 366230f712c9SDave Chinner xfs_fileoff_t end, 366330f712c9SDave Chinner int n, 366430f712c9SDave Chinner int flags) 366530f712c9SDave Chinner { 366630f712c9SDave Chinner if ((flags & XFS_BMAPI_ENTIRE) || 366730f712c9SDave Chinner got->br_startoff + got->br_blockcount <= obno) { 366830f712c9SDave Chinner *mval = *got; 366930f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 367030f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 367130f712c9SDave Chinner return; 367230f712c9SDave Chinner } 367330f712c9SDave Chinner 367430f712c9SDave Chinner if (obno > *bno) 367530f712c9SDave Chinner *bno = obno; 367630f712c9SDave Chinner ASSERT((*bno >= obno) || (n == 0)); 367730f712c9SDave Chinner ASSERT(*bno < end); 367830f712c9SDave Chinner mval->br_startoff = *bno; 367930f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 368030f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 368130f712c9SDave Chinner else 368230f712c9SDave Chinner mval->br_startblock = got->br_startblock + 368330f712c9SDave Chinner (*bno - got->br_startoff); 368430f712c9SDave Chinner /* 368530f712c9SDave Chinner * Return the minimum of what we got and what we asked for for 368630f712c9SDave Chinner * the length. We can use the len variable here because it is 368730f712c9SDave Chinner * modified below and we could have been there before coming 368830f712c9SDave Chinner * here if the first part of the allocation didn't overlap what 368930f712c9SDave Chinner * was asked for. 369030f712c9SDave Chinner */ 369130f712c9SDave Chinner mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, 369230f712c9SDave Chinner got->br_blockcount - (*bno - got->br_startoff)); 369330f712c9SDave Chinner mval->br_state = got->br_state; 369430f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 369530f712c9SDave Chinner return; 369630f712c9SDave Chinner } 369730f712c9SDave Chinner 369830f712c9SDave Chinner /* 369930f712c9SDave Chinner * Update and validate the extent map to return 370030f712c9SDave Chinner */ 370130f712c9SDave Chinner STATIC void 370230f712c9SDave Chinner xfs_bmapi_update_map( 370330f712c9SDave Chinner struct xfs_bmbt_irec **map, 370430f712c9SDave Chinner xfs_fileoff_t *bno, 370530f712c9SDave Chinner xfs_filblks_t *len, 370630f712c9SDave Chinner xfs_fileoff_t obno, 370730f712c9SDave Chinner xfs_fileoff_t end, 370830f712c9SDave Chinner int *n, 370930f712c9SDave Chinner int flags) 371030f712c9SDave Chinner { 371130f712c9SDave Chinner xfs_bmbt_irec_t *mval = *map; 371230f712c9SDave Chinner 371330f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || 371430f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= end)); 371530f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || 371630f712c9SDave Chinner (mval->br_startoff < obno)); 371730f712c9SDave Chinner 371830f712c9SDave Chinner *bno = mval->br_startoff + mval->br_blockcount; 371930f712c9SDave Chinner *len = end - *bno; 372030f712c9SDave Chinner if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { 372130f712c9SDave Chinner /* update previous map with new information */ 372230f712c9SDave Chinner ASSERT(mval->br_startblock == mval[-1].br_startblock); 372330f712c9SDave Chinner ASSERT(mval->br_blockcount > mval[-1].br_blockcount); 372430f712c9SDave Chinner ASSERT(mval->br_state == mval[-1].br_state); 372530f712c9SDave Chinner mval[-1].br_blockcount = mval->br_blockcount; 372630f712c9SDave Chinner mval[-1].br_state = mval->br_state; 372730f712c9SDave Chinner } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && 372830f712c9SDave Chinner mval[-1].br_startblock != DELAYSTARTBLOCK && 372930f712c9SDave Chinner mval[-1].br_startblock != HOLESTARTBLOCK && 373030f712c9SDave Chinner mval->br_startblock == mval[-1].br_startblock + 373130f712c9SDave Chinner mval[-1].br_blockcount && 373230f712c9SDave Chinner ((flags & XFS_BMAPI_IGSTATE) || 373330f712c9SDave Chinner mval[-1].br_state == mval->br_state)) { 373430f712c9SDave Chinner ASSERT(mval->br_startoff == 373530f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount); 373630f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 373730f712c9SDave Chinner } else if (*n > 0 && 373830f712c9SDave Chinner mval->br_startblock == DELAYSTARTBLOCK && 373930f712c9SDave Chinner mval[-1].br_startblock == DELAYSTARTBLOCK && 374030f712c9SDave Chinner mval->br_startoff == 374130f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount) { 374230f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 374330f712c9SDave Chinner mval[-1].br_state = mval->br_state; 374430f712c9SDave Chinner } else if (!((*n == 0) && 374530f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= 374630f712c9SDave Chinner obno))) { 374730f712c9SDave Chinner mval++; 374830f712c9SDave Chinner (*n)++; 374930f712c9SDave Chinner } 375030f712c9SDave Chinner *map = mval; 375130f712c9SDave Chinner } 375230f712c9SDave Chinner 375330f712c9SDave Chinner /* 375430f712c9SDave Chinner * Map file blocks to filesystem blocks without allocation. 375530f712c9SDave Chinner */ 375630f712c9SDave Chinner int 375730f712c9SDave Chinner xfs_bmapi_read( 375830f712c9SDave Chinner struct xfs_inode *ip, 375930f712c9SDave Chinner xfs_fileoff_t bno, 376030f712c9SDave Chinner xfs_filblks_t len, 376130f712c9SDave Chinner struct xfs_bmbt_irec *mval, 376230f712c9SDave Chinner int *nmap, 376330f712c9SDave Chinner int flags) 376430f712c9SDave Chinner { 376530f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 376630f712c9SDave Chinner struct xfs_ifork *ifp; 376730f712c9SDave Chinner struct xfs_bmbt_irec got; 376830f712c9SDave Chinner xfs_fileoff_t obno; 376930f712c9SDave Chinner xfs_fileoff_t end; 3770b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 377130f712c9SDave Chinner int error; 3772334f3423SChristoph Hellwig bool eof = false; 377330f712c9SDave Chinner int n = 0; 37743993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 377530f712c9SDave Chinner 377630f712c9SDave Chinner ASSERT(*nmap >= 1); 377730f712c9SDave Chinner ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| 37783993baebSDarrick J. Wong XFS_BMAPI_IGSTATE|XFS_BMAPI_COWFORK))); 377930f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); 378030f712c9SDave Chinner 378130f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 378230f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 378330f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 37849e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 378530f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); 37862451337dSDave Chinner return -EFSCORRUPTED; 378730f712c9SDave Chinner } 378830f712c9SDave Chinner 378930f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 37902451337dSDave Chinner return -EIO; 379130f712c9SDave Chinner 3792ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapr); 379330f712c9SDave Chinner 379430f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 379530f712c9SDave Chinner 37963993baebSDarrick J. Wong /* No CoW fork? Return a hole. */ 37973993baebSDarrick J. Wong if (whichfork == XFS_COW_FORK && !ifp) { 37983993baebSDarrick J. Wong mval->br_startoff = bno; 37993993baebSDarrick J. Wong mval->br_startblock = HOLESTARTBLOCK; 38003993baebSDarrick J. Wong mval->br_blockcount = len; 38013993baebSDarrick J. Wong mval->br_state = XFS_EXT_NORM; 38023993baebSDarrick J. Wong *nmap = 1; 38033993baebSDarrick J. Wong return 0; 38043993baebSDarrick J. Wong } 38053993baebSDarrick J. Wong 380630f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 380730f712c9SDave Chinner error = xfs_iread_extents(NULL, ip, whichfork); 380830f712c9SDave Chinner if (error) 380930f712c9SDave Chinner return error; 381030f712c9SDave Chinner } 381130f712c9SDave Chinner 3812b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &icur, &got)) 3813334f3423SChristoph Hellwig eof = true; 381430f712c9SDave Chinner end = bno + len; 381530f712c9SDave Chinner obno = bno; 381630f712c9SDave Chinner 381730f712c9SDave Chinner while (bno < end && n < *nmap) { 381830f712c9SDave Chinner /* Reading past eof, act as though there's a hole up to end. */ 381930f712c9SDave Chinner if (eof) 382030f712c9SDave Chinner got.br_startoff = end; 382130f712c9SDave Chinner if (got.br_startoff > bno) { 382230f712c9SDave Chinner /* Reading in a hole. */ 382330f712c9SDave Chinner mval->br_startoff = bno; 382430f712c9SDave Chinner mval->br_startblock = HOLESTARTBLOCK; 382530f712c9SDave Chinner mval->br_blockcount = 382630f712c9SDave Chinner XFS_FILBLKS_MIN(len, got.br_startoff - bno); 382730f712c9SDave Chinner mval->br_state = XFS_EXT_NORM; 382830f712c9SDave Chinner bno += mval->br_blockcount; 382930f712c9SDave Chinner len -= mval->br_blockcount; 383030f712c9SDave Chinner mval++; 383130f712c9SDave Chinner n++; 383230f712c9SDave Chinner continue; 383330f712c9SDave Chinner } 383430f712c9SDave Chinner 383530f712c9SDave Chinner /* set up the extent map to return. */ 383630f712c9SDave Chinner xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); 383730f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 383830f712c9SDave Chinner 383930f712c9SDave Chinner /* If we're done, stop now. */ 384030f712c9SDave Chinner if (bno >= end || n >= *nmap) 384130f712c9SDave Chinner break; 384230f712c9SDave Chinner 384330f712c9SDave Chinner /* Else go on to the next record. */ 3844b2b1712aSChristoph Hellwig if (!xfs_iext_next_extent(ifp, &icur, &got)) 3845334f3423SChristoph Hellwig eof = true; 384630f712c9SDave Chinner } 384730f712c9SDave Chinner *nmap = n; 384830f712c9SDave Chinner return 0; 384930f712c9SDave Chinner } 385030f712c9SDave Chinner 3851f65e6fadSBrian Foster /* 3852f65e6fadSBrian Foster * Add a delayed allocation extent to an inode. Blocks are reserved from the 3853f65e6fadSBrian Foster * global pool and the extent inserted into the inode in-core extent tree. 3854f65e6fadSBrian Foster * 3855f65e6fadSBrian Foster * On entry, got refers to the first extent beyond the offset of the extent to 3856f65e6fadSBrian Foster * allocate or eof is specified if no such extent exists. On return, got refers 3857f65e6fadSBrian Foster * to the extent record that was inserted to the inode fork. 3858f65e6fadSBrian Foster * 3859f65e6fadSBrian Foster * Note that the allocated extent may have been merged with contiguous extents 3860f65e6fadSBrian Foster * during insertion into the inode fork. Thus, got does not reflect the current 3861f65e6fadSBrian Foster * state of the inode fork on return. If necessary, the caller can use lastx to 3862f65e6fadSBrian Foster * look up the updated record in the inode fork. 3863f65e6fadSBrian Foster */ 386451446f5bSChristoph Hellwig int 386530f712c9SDave Chinner xfs_bmapi_reserve_delalloc( 386630f712c9SDave Chinner struct xfs_inode *ip, 3867be51f811SDarrick J. Wong int whichfork, 3868974ae922SBrian Foster xfs_fileoff_t off, 386930f712c9SDave Chinner xfs_filblks_t len, 3870974ae922SBrian Foster xfs_filblks_t prealloc, 387130f712c9SDave Chinner struct xfs_bmbt_irec *got, 3872b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 387330f712c9SDave Chinner int eof) 387430f712c9SDave Chinner { 387530f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 3876be51f811SDarrick J. Wong struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 387730f712c9SDave Chinner xfs_extlen_t alen; 387830f712c9SDave Chinner xfs_extlen_t indlen; 387930f712c9SDave Chinner char rt = XFS_IS_REALTIME_INODE(ip); 388030f712c9SDave Chinner xfs_extlen_t extsz; 388130f712c9SDave Chinner int error; 3882974ae922SBrian Foster xfs_fileoff_t aoff = off; 388330f712c9SDave Chinner 3884974ae922SBrian Foster /* 3885974ae922SBrian Foster * Cap the alloc length. Keep track of prealloc so we know whether to 3886974ae922SBrian Foster * tag the inode before we return. 3887974ae922SBrian Foster */ 3888974ae922SBrian Foster alen = XFS_FILBLKS_MIN(len + prealloc, MAXEXTLEN); 388930f712c9SDave Chinner if (!eof) 389030f712c9SDave Chinner alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); 3891974ae922SBrian Foster if (prealloc && alen >= len) 3892974ae922SBrian Foster prealloc = alen - len; 389330f712c9SDave Chinner 389430f712c9SDave Chinner /* Figure out the extent size, adjust alen */ 3895f7ca3522SDarrick J. Wong if (whichfork == XFS_COW_FORK) 3896f7ca3522SDarrick J. Wong extsz = xfs_get_cowextsz_hint(ip); 3897f7ca3522SDarrick J. Wong else 389830f712c9SDave Chinner extsz = xfs_get_extsz_hint(ip); 389930f712c9SDave Chinner if (extsz) { 390065c5f419SChristoph Hellwig struct xfs_bmbt_irec prev; 390165c5f419SChristoph Hellwig 3902b2b1712aSChristoph Hellwig if (!xfs_iext_peek_prev_extent(ifp, icur, &prev)) 390365c5f419SChristoph Hellwig prev.br_startoff = NULLFILEOFF; 390465c5f419SChristoph Hellwig 390565c5f419SChristoph Hellwig error = xfs_bmap_extsize_align(mp, got, &prev, extsz, rt, eof, 390630f712c9SDave Chinner 1, 0, &aoff, &alen); 390730f712c9SDave Chinner ASSERT(!error); 390830f712c9SDave Chinner } 390930f712c9SDave Chinner 391030f712c9SDave Chinner if (rt) 391130f712c9SDave Chinner extsz = alen / mp->m_sb.sb_rextsize; 391230f712c9SDave Chinner 391330f712c9SDave Chinner /* 391430f712c9SDave Chinner * Make a transaction-less quota reservation for delayed allocation 391530f712c9SDave Chinner * blocks. This number gets adjusted later. We return if we haven't 391630f712c9SDave Chinner * allocated blocks already inside this loop. 391730f712c9SDave Chinner */ 391830f712c9SDave Chinner error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, 391930f712c9SDave Chinner rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 392030f712c9SDave Chinner if (error) 392130f712c9SDave Chinner return error; 392230f712c9SDave Chinner 392330f712c9SDave Chinner /* 392430f712c9SDave Chinner * Split changing sb for alen and indlen since they could be coming 392530f712c9SDave Chinner * from different places. 392630f712c9SDave Chinner */ 392730f712c9SDave Chinner indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); 392830f712c9SDave Chinner ASSERT(indlen > 0); 392930f712c9SDave Chinner 393030f712c9SDave Chinner if (rt) { 3931bab98bbeSDave Chinner error = xfs_mod_frextents(mp, -((int64_t)extsz)); 393230f712c9SDave Chinner } else { 39330d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); 393430f712c9SDave Chinner } 393530f712c9SDave Chinner 393630f712c9SDave Chinner if (error) 393730f712c9SDave Chinner goto out_unreserve_quota; 393830f712c9SDave Chinner 39390d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); 394030f712c9SDave Chinner if (error) 394130f712c9SDave Chinner goto out_unreserve_blocks; 394230f712c9SDave Chinner 394330f712c9SDave Chinner 394430f712c9SDave Chinner ip->i_delayed_blks += alen; 394530f712c9SDave Chinner 394630f712c9SDave Chinner got->br_startoff = aoff; 394730f712c9SDave Chinner got->br_startblock = nullstartblock(indlen); 394830f712c9SDave Chinner got->br_blockcount = alen; 394930f712c9SDave Chinner got->br_state = XFS_EXT_NORM; 395030f712c9SDave Chinner 3951b2b1712aSChristoph Hellwig xfs_bmap_add_extent_hole_delay(ip, whichfork, icur, got); 395230f712c9SDave Chinner 3953974ae922SBrian Foster /* 3954974ae922SBrian Foster * Tag the inode if blocks were preallocated. Note that COW fork 3955974ae922SBrian Foster * preallocation can occur at the start or end of the extent, even when 3956974ae922SBrian Foster * prealloc == 0, so we must also check the aligned offset and length. 3957974ae922SBrian Foster */ 3958974ae922SBrian Foster if (whichfork == XFS_DATA_FORK && prealloc) 3959974ae922SBrian Foster xfs_inode_set_eofblocks_tag(ip); 3960974ae922SBrian Foster if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len)) 3961974ae922SBrian Foster xfs_inode_set_cowblocks_tag(ip); 3962974ae922SBrian Foster 396330f712c9SDave Chinner return 0; 396430f712c9SDave Chinner 396530f712c9SDave Chinner out_unreserve_blocks: 396630f712c9SDave Chinner if (rt) 3967bab98bbeSDave Chinner xfs_mod_frextents(mp, extsz); 396830f712c9SDave Chinner else 39690d485adaSDave Chinner xfs_mod_fdblocks(mp, alen, false); 397030f712c9SDave Chinner out_unreserve_quota: 397130f712c9SDave Chinner if (XFS_IS_QUOTA_ON(mp)) 397230f712c9SDave Chinner xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? 397330f712c9SDave Chinner XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 397430f712c9SDave Chinner return error; 397530f712c9SDave Chinner } 397630f712c9SDave Chinner 39777f8a058fSDave Chinner static int 39787f8a058fSDave Chinner xfs_bmapi_allocate( 397930f712c9SDave Chinner struct xfs_bmalloca *bma) 398030f712c9SDave Chinner { 398130f712c9SDave Chinner struct xfs_mount *mp = bma->ip->i_mount; 398260b4984fSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(bma->flags); 398330f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 398430f712c9SDave Chinner int tmp_logflags = 0; 398530f712c9SDave Chinner int error; 398630f712c9SDave Chinner 398730f712c9SDave Chinner ASSERT(bma->length > 0); 398830f712c9SDave Chinner 398930f712c9SDave Chinner /* 399030f712c9SDave Chinner * For the wasdelay case, we could also just allocate the stuff asked 399130f712c9SDave Chinner * for in this bmap call but that wouldn't be as good. 399230f712c9SDave Chinner */ 399330f712c9SDave Chinner if (bma->wasdel) { 399430f712c9SDave Chinner bma->length = (xfs_extlen_t)bma->got.br_blockcount; 399530f712c9SDave Chinner bma->offset = bma->got.br_startoff; 3996b2b1712aSChristoph Hellwig xfs_iext_peek_prev_extent(ifp, &bma->icur, &bma->prev); 399730f712c9SDave Chinner } else { 399830f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); 399930f712c9SDave Chinner if (!bma->eof) 400030f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, 400130f712c9SDave Chinner bma->got.br_startoff - bma->offset); 400230f712c9SDave Chinner } 400330f712c9SDave Chinner 400430f712c9SDave Chinner /* 4005292378edSDave Chinner * Set the data type being allocated. For the data fork, the first data 4006292378edSDave Chinner * in the file is treated differently to all other allocations. For the 4007292378edSDave Chinner * attribute fork, we only need to ensure the allocated range is not on 4008292378edSDave Chinner * the busy list. 400930f712c9SDave Chinner */ 401030f712c9SDave Chinner if (!(bma->flags & XFS_BMAPI_METADATA)) { 4011292378edSDave Chinner bma->datatype = XFS_ALLOC_NOBUSY; 4012292378edSDave Chinner if (whichfork == XFS_DATA_FORK) { 4013292378edSDave Chinner if (bma->offset == 0) 4014292378edSDave Chinner bma->datatype |= XFS_ALLOC_INITIAL_USER_DATA; 4015292378edSDave Chinner else 4016292378edSDave Chinner bma->datatype |= XFS_ALLOC_USERDATA; 4017292378edSDave Chinner } 40183fbbbea3SDave Chinner if (bma->flags & XFS_BMAPI_ZERO) 4019292378edSDave Chinner bma->datatype |= XFS_ALLOC_USERDATA_ZERO; 402030f712c9SDave Chinner } 402130f712c9SDave Chinner 402230f712c9SDave Chinner bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; 402330f712c9SDave Chinner 402430f712c9SDave Chinner /* 402530f712c9SDave Chinner * Only want to do the alignment at the eof if it is userdata and 402630f712c9SDave Chinner * allocation length is larger than a stripe unit. 402730f712c9SDave Chinner */ 402830f712c9SDave Chinner if (mp->m_dalign && bma->length >= mp->m_dalign && 402930f712c9SDave Chinner !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { 403030f712c9SDave Chinner error = xfs_bmap_isaeof(bma, whichfork); 403130f712c9SDave Chinner if (error) 403230f712c9SDave Chinner return error; 403330f712c9SDave Chinner } 403430f712c9SDave Chinner 403530f712c9SDave Chinner error = xfs_bmap_alloc(bma); 403630f712c9SDave Chinner if (error) 403730f712c9SDave Chinner return error; 403830f712c9SDave Chinner 403930f712c9SDave Chinner if (bma->cur) 404030f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 404130f712c9SDave Chinner if (bma->blkno == NULLFSBLOCK) 404230f712c9SDave Chinner return 0; 404330f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 404430f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); 404530f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 40462c3234d1SDarrick J. Wong bma->cur->bc_private.b.dfops = bma->dfops; 404730f712c9SDave Chinner } 404830f712c9SDave Chinner /* 404930f712c9SDave Chinner * Bump the number of extents we've allocated 405030f712c9SDave Chinner * in this call. 405130f712c9SDave Chinner */ 405230f712c9SDave Chinner bma->nallocs++; 405330f712c9SDave Chinner 405430f712c9SDave Chinner if (bma->cur) 405530f712c9SDave Chinner bma->cur->bc_private.b.flags = 405630f712c9SDave Chinner bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; 405730f712c9SDave Chinner 405830f712c9SDave Chinner bma->got.br_startoff = bma->offset; 405930f712c9SDave Chinner bma->got.br_startblock = bma->blkno; 406030f712c9SDave Chinner bma->got.br_blockcount = bma->length; 406130f712c9SDave Chinner bma->got.br_state = XFS_EXT_NORM; 406230f712c9SDave Chinner 406330f712c9SDave Chinner /* 406405a630d7SDarrick J. Wong * In the data fork, a wasdelay extent has been initialized, so 406505a630d7SDarrick J. Wong * shouldn't be flagged as unwritten. 406605a630d7SDarrick J. Wong * 406705a630d7SDarrick J. Wong * For the cow fork, however, we convert delalloc reservations 406805a630d7SDarrick J. Wong * (extents allocated for speculative preallocation) to 406905a630d7SDarrick J. Wong * allocated unwritten extents, and only convert the unwritten 407005a630d7SDarrick J. Wong * extents to real extents when we're about to write the data. 407130f712c9SDave Chinner */ 407205a630d7SDarrick J. Wong if ((!bma->wasdel || (bma->flags & XFS_BMAPI_COWFORK)) && 407305a630d7SDarrick J. Wong (bma->flags & XFS_BMAPI_PREALLOC) && 407430f712c9SDave Chinner xfs_sb_version_hasextflgbit(&mp->m_sb)) 407530f712c9SDave Chinner bma->got.br_state = XFS_EXT_UNWRITTEN; 407630f712c9SDave Chinner 407730f712c9SDave Chinner if (bma->wasdel) 407860b4984fSDarrick J. Wong error = xfs_bmap_add_extent_delay_real(bma, whichfork); 407930f712c9SDave Chinner else 40806d04558fSChristoph Hellwig error = xfs_bmap_add_extent_hole_real(bma->tp, bma->ip, 4081b2b1712aSChristoph Hellwig whichfork, &bma->icur, &bma->cur, &bma->got, 40826d04558fSChristoph Hellwig bma->firstblock, bma->dfops, &bma->logflags); 408330f712c9SDave Chinner 408430f712c9SDave Chinner bma->logflags |= tmp_logflags; 408530f712c9SDave Chinner if (error) 408630f712c9SDave Chinner return error; 408730f712c9SDave Chinner 408830f712c9SDave Chinner /* 408930f712c9SDave Chinner * Update our extent pointer, given that xfs_bmap_add_extent_delay_real 409030f712c9SDave Chinner * or xfs_bmap_add_extent_hole_real might have merged it into one of 409130f712c9SDave Chinner * the neighbouring ones. 409230f712c9SDave Chinner */ 4093b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &bma->icur, &bma->got); 409430f712c9SDave Chinner 409530f712c9SDave Chinner ASSERT(bma->got.br_startoff <= bma->offset); 409630f712c9SDave Chinner ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= 409730f712c9SDave Chinner bma->offset + bma->length); 409830f712c9SDave Chinner ASSERT(bma->got.br_state == XFS_EXT_NORM || 409930f712c9SDave Chinner bma->got.br_state == XFS_EXT_UNWRITTEN); 410030f712c9SDave Chinner return 0; 410130f712c9SDave Chinner } 410230f712c9SDave Chinner 410330f712c9SDave Chinner STATIC int 410430f712c9SDave Chinner xfs_bmapi_convert_unwritten( 410530f712c9SDave Chinner struct xfs_bmalloca *bma, 410630f712c9SDave Chinner struct xfs_bmbt_irec *mval, 410730f712c9SDave Chinner xfs_filblks_t len, 410830f712c9SDave Chinner int flags) 410930f712c9SDave Chinner { 41103993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 411130f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 411230f712c9SDave Chinner int tmp_logflags = 0; 411330f712c9SDave Chinner int error; 411430f712c9SDave Chinner 411530f712c9SDave Chinner /* check if we need to do unwritten->real conversion */ 411630f712c9SDave Chinner if (mval->br_state == XFS_EXT_UNWRITTEN && 411730f712c9SDave Chinner (flags & XFS_BMAPI_PREALLOC)) 411830f712c9SDave Chinner return 0; 411930f712c9SDave Chinner 412030f712c9SDave Chinner /* check if we need to do real->unwritten conversion */ 412130f712c9SDave Chinner if (mval->br_state == XFS_EXT_NORM && 412230f712c9SDave Chinner (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != 412330f712c9SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) 412430f712c9SDave Chinner return 0; 412530f712c9SDave Chinner 412630f712c9SDave Chinner /* 412730f712c9SDave Chinner * Modify (by adding) the state flag, if writing. 412830f712c9SDave Chinner */ 412930f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 413030f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 413130f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, 413230f712c9SDave Chinner bma->ip, whichfork); 413330f712c9SDave Chinner bma->cur->bc_private.b.firstblock = *bma->firstblock; 41342c3234d1SDarrick J. Wong bma->cur->bc_private.b.dfops = bma->dfops; 413530f712c9SDave Chinner } 413630f712c9SDave Chinner mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) 413730f712c9SDave Chinner ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; 413830f712c9SDave Chinner 41393fbbbea3SDave Chinner /* 41403fbbbea3SDave Chinner * Before insertion into the bmbt, zero the range being converted 41413fbbbea3SDave Chinner * if required. 41423fbbbea3SDave Chinner */ 41433fbbbea3SDave Chinner if (flags & XFS_BMAPI_ZERO) { 41443fbbbea3SDave Chinner error = xfs_zero_extent(bma->ip, mval->br_startblock, 41453fbbbea3SDave Chinner mval->br_blockcount); 41463fbbbea3SDave Chinner if (error) 41473fbbbea3SDave Chinner return error; 41483fbbbea3SDave Chinner } 41493fbbbea3SDave Chinner 415005a630d7SDarrick J. Wong error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, whichfork, 4151b2b1712aSChristoph Hellwig &bma->icur, &bma->cur, mval, bma->firstblock, 4152b2b1712aSChristoph Hellwig bma->dfops, &tmp_logflags); 41532e588a46SBrian Foster /* 41542e588a46SBrian Foster * Log the inode core unconditionally in the unwritten extent conversion 41552e588a46SBrian Foster * path because the conversion might not have done so (e.g., if the 41562e588a46SBrian Foster * extent count hasn't changed). We need to make sure the inode is dirty 41572e588a46SBrian Foster * in the transaction for the sake of fsync(), even if nothing has 41582e588a46SBrian Foster * changed, because fsync() will not force the log for this transaction 41592e588a46SBrian Foster * unless it sees the inode pinned. 416005a630d7SDarrick J. Wong * 416105a630d7SDarrick J. Wong * Note: If we're only converting cow fork extents, there aren't 416205a630d7SDarrick J. Wong * any on-disk updates to make, so we don't need to log anything. 41632e588a46SBrian Foster */ 416405a630d7SDarrick J. Wong if (whichfork != XFS_COW_FORK) 41652e588a46SBrian Foster bma->logflags |= tmp_logflags | XFS_ILOG_CORE; 416630f712c9SDave Chinner if (error) 416730f712c9SDave Chinner return error; 416830f712c9SDave Chinner 416930f712c9SDave Chinner /* 417030f712c9SDave Chinner * Update our extent pointer, given that 417130f712c9SDave Chinner * xfs_bmap_add_extent_unwritten_real might have merged it into one 417230f712c9SDave Chinner * of the neighbouring ones. 417330f712c9SDave Chinner */ 4174b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &bma->icur, &bma->got); 417530f712c9SDave Chinner 417630f712c9SDave Chinner /* 417730f712c9SDave Chinner * We may have combined previously unwritten space with written space, 417830f712c9SDave Chinner * so generate another request. 417930f712c9SDave Chinner */ 418030f712c9SDave Chinner if (mval->br_blockcount < len) 41812451337dSDave Chinner return -EAGAIN; 418230f712c9SDave Chinner return 0; 418330f712c9SDave Chinner } 418430f712c9SDave Chinner 418530f712c9SDave Chinner /* 418630f712c9SDave Chinner * Map file blocks to filesystem blocks, and allocate blocks or convert the 418730f712c9SDave Chinner * extent state if necessary. Details behaviour is controlled by the flags 418830f712c9SDave Chinner * parameter. Only allocates blocks from a single allocation group, to avoid 418930f712c9SDave Chinner * locking problems. 419030f712c9SDave Chinner * 419130f712c9SDave Chinner * The returned value in "firstblock" from the first call in a transaction 419230f712c9SDave Chinner * must be remembered and presented to subsequent calls in "firstblock". 419330f712c9SDave Chinner * An upper bound for the number of blocks to be allocated is supplied to 419430f712c9SDave Chinner * the first call in "total"; if no allocation group has that many free 419530f712c9SDave Chinner * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). 419630f712c9SDave Chinner */ 419730f712c9SDave Chinner int 419830f712c9SDave Chinner xfs_bmapi_write( 419930f712c9SDave Chinner struct xfs_trans *tp, /* transaction pointer */ 420030f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 420130f712c9SDave Chinner xfs_fileoff_t bno, /* starting file offs. mapped */ 420230f712c9SDave Chinner xfs_filblks_t len, /* length to map in file */ 420330f712c9SDave Chinner int flags, /* XFS_BMAPI_... */ 420430f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first allocated block 420530f712c9SDave Chinner controls a.g. for allocs */ 420630f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed */ 420730f712c9SDave Chinner struct xfs_bmbt_irec *mval, /* output: map values */ 420830f712c9SDave Chinner int *nmap, /* i/o: mval size/count */ 42092c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops) /* i/o: list extents to free */ 421030f712c9SDave Chinner { 421130f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 421230f712c9SDave Chinner struct xfs_ifork *ifp; 421330f712c9SDave Chinner struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ 421430f712c9SDave Chinner xfs_fileoff_t end; /* end of mapped file region */ 42152d58f6efSChristoph Hellwig bool eof = false; /* after the end of extents */ 421630f712c9SDave Chinner int error; /* error return */ 421730f712c9SDave Chinner int n; /* current extent index */ 421830f712c9SDave Chinner xfs_fileoff_t obno; /* old block number (offset) */ 421930f712c9SDave Chinner int whichfork; /* data or attr fork */ 422030f712c9SDave Chinner 422130f712c9SDave Chinner #ifdef DEBUG 422230f712c9SDave Chinner xfs_fileoff_t orig_bno; /* original block number value */ 422330f712c9SDave Chinner int orig_flags; /* original flags arg value */ 422430f712c9SDave Chinner xfs_filblks_t orig_len; /* original value of len arg */ 422530f712c9SDave Chinner struct xfs_bmbt_irec *orig_mval; /* original value of mval */ 422630f712c9SDave Chinner int orig_nmap; /* original value of *nmap */ 422730f712c9SDave Chinner 422830f712c9SDave Chinner orig_bno = bno; 422930f712c9SDave Chinner orig_len = len; 423030f712c9SDave Chinner orig_flags = flags; 423130f712c9SDave Chinner orig_mval = mval; 423230f712c9SDave Chinner orig_nmap = *nmap; 423330f712c9SDave Chinner #endif 423460b4984fSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 423530f712c9SDave Chinner 423630f712c9SDave Chinner ASSERT(*nmap >= 1); 423730f712c9SDave Chinner ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); 423830f712c9SDave Chinner ASSERT(!(flags & XFS_BMAPI_IGSTATE)); 423905a630d7SDarrick J. Wong ASSERT(tp != NULL || 424005a630d7SDarrick J. Wong (flags & (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)) == 424105a630d7SDarrick J. Wong (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)); 424230f712c9SDave Chinner ASSERT(len > 0); 424330f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); 424430f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 42456ebd5a44SChristoph Hellwig ASSERT(!(flags & XFS_BMAPI_REMAP)); 424630f712c9SDave Chinner 42473fbbbea3SDave Chinner /* zeroing is for currently only for data extents, not metadata */ 42483fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != 42493fbbbea3SDave Chinner (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)); 42503fbbbea3SDave Chinner /* 42513fbbbea3SDave Chinner * we can allocate unwritten extents or pre-zero allocated blocks, 42523fbbbea3SDave Chinner * but it makes no sense to do both at once. This would result in 42533fbbbea3SDave Chinner * zeroing the unwritten extent twice, but it still being an 42543fbbbea3SDave Chinner * unwritten extent.... 42553fbbbea3SDave Chinner */ 42563fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)) != 42573fbbbea3SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)); 42583fbbbea3SDave Chinner 425930f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 426030f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 426130f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 42629e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 426330f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); 42642451337dSDave Chinner return -EFSCORRUPTED; 426530f712c9SDave Chinner } 426630f712c9SDave Chinner 426730f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 42682451337dSDave Chinner return -EIO; 426930f712c9SDave Chinner 427030f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 427130f712c9SDave Chinner 4272ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapw); 427330f712c9SDave Chinner 427430f712c9SDave Chinner if (*firstblock == NULLFSBLOCK) { 427530f712c9SDave Chinner if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) 427630f712c9SDave Chinner bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; 427730f712c9SDave Chinner else 427830f712c9SDave Chinner bma.minleft = 1; 427930f712c9SDave Chinner } else { 428030f712c9SDave Chinner bma.minleft = 0; 428130f712c9SDave Chinner } 428230f712c9SDave Chinner 428330f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 428430f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 428530f712c9SDave Chinner if (error) 428630f712c9SDave Chinner goto error0; 428730f712c9SDave Chinner } 428830f712c9SDave Chinner 428930f712c9SDave Chinner n = 0; 429030f712c9SDave Chinner end = bno + len; 429130f712c9SDave Chinner obno = bno; 429230f712c9SDave Chinner 4293b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &bma.icur, &bma.got)) 42942d58f6efSChristoph Hellwig eof = true; 4295b2b1712aSChristoph Hellwig if (!xfs_iext_peek_prev_extent(ifp, &bma.icur, &bma.prev)) 42962d58f6efSChristoph Hellwig bma.prev.br_startoff = NULLFILEOFF; 429730f712c9SDave Chinner bma.tp = tp; 429830f712c9SDave Chinner bma.ip = ip; 429930f712c9SDave Chinner bma.total = total; 4300292378edSDave Chinner bma.datatype = 0; 43012c3234d1SDarrick J. Wong bma.dfops = dfops; 430230f712c9SDave Chinner bma.firstblock = firstblock; 430330f712c9SDave Chinner 430430f712c9SDave Chinner while (bno < end && n < *nmap) { 4305d2b3964aSChristoph Hellwig bool need_alloc = false, wasdelay = false; 430630f712c9SDave Chinner 4307d2b3964aSChristoph Hellwig /* in hole or beyoned EOF? */ 4308d2b3964aSChristoph Hellwig if (eof || bma.got.br_startoff > bno) { 4309d2b3964aSChristoph Hellwig if (flags & XFS_BMAPI_DELALLOC) { 4310d2b3964aSChristoph Hellwig /* 4311d2b3964aSChristoph Hellwig * For the COW fork we can reasonably get a 4312d2b3964aSChristoph Hellwig * request for converting an extent that races 4313d2b3964aSChristoph Hellwig * with other threads already having converted 4314d2b3964aSChristoph Hellwig * part of it, as there converting COW to 4315d2b3964aSChristoph Hellwig * regular blocks is not protected using the 4316d2b3964aSChristoph Hellwig * IOLOCK. 4317d2b3964aSChristoph Hellwig */ 4318d2b3964aSChristoph Hellwig ASSERT(flags & XFS_BMAPI_COWFORK); 4319d2b3964aSChristoph Hellwig if (!(flags & XFS_BMAPI_COWFORK)) { 4320d2b3964aSChristoph Hellwig error = -EIO; 4321d2b3964aSChristoph Hellwig goto error0; 4322d2b3964aSChristoph Hellwig } 4323d2b3964aSChristoph Hellwig 4324d2b3964aSChristoph Hellwig if (eof || bno >= end) 4325d2b3964aSChristoph Hellwig break; 4326d2b3964aSChristoph Hellwig } else { 4327d2b3964aSChristoph Hellwig need_alloc = true; 4328d2b3964aSChristoph Hellwig } 43296ebd5a44SChristoph Hellwig } else if (isnullstartblock(bma.got.br_startblock)) { 4330d2b3964aSChristoph Hellwig wasdelay = true; 4331d2b3964aSChristoph Hellwig } 4332f65306eaSDarrick J. Wong 4333f65306eaSDarrick J. Wong /* 433430f712c9SDave Chinner * First, deal with the hole before the allocated space 433530f712c9SDave Chinner * that we found, if any. 433630f712c9SDave Chinner */ 4337b121459cSChristoph Hellwig if ((need_alloc || wasdelay) && 4338b121459cSChristoph Hellwig !(flags & XFS_BMAPI_CONVERT_ONLY)) { 433930f712c9SDave Chinner bma.eof = eof; 434030f712c9SDave Chinner bma.conv = !!(flags & XFS_BMAPI_CONVERT); 434130f712c9SDave Chinner bma.wasdel = wasdelay; 434230f712c9SDave Chinner bma.offset = bno; 434330f712c9SDave Chinner bma.flags = flags; 434430f712c9SDave Chinner 434530f712c9SDave Chinner /* 434630f712c9SDave Chinner * There's a 32/64 bit type mismatch between the 434730f712c9SDave Chinner * allocation length request (which can be 64 bits in 434830f712c9SDave Chinner * length) and the bma length request, which is 434930f712c9SDave Chinner * xfs_extlen_t and therefore 32 bits. Hence we have to 435030f712c9SDave Chinner * check for 32-bit overflows and handle them here. 435130f712c9SDave Chinner */ 435230f712c9SDave Chinner if (len > (xfs_filblks_t)MAXEXTLEN) 435330f712c9SDave Chinner bma.length = MAXEXTLEN; 435430f712c9SDave Chinner else 435530f712c9SDave Chinner bma.length = len; 435630f712c9SDave Chinner 435730f712c9SDave Chinner ASSERT(len > 0); 435830f712c9SDave Chinner ASSERT(bma.length > 0); 435930f712c9SDave Chinner error = xfs_bmapi_allocate(&bma); 436030f712c9SDave Chinner if (error) 436130f712c9SDave Chinner goto error0; 436230f712c9SDave Chinner if (bma.blkno == NULLFSBLOCK) 436330f712c9SDave Chinner break; 4364174edb0eSDarrick J. Wong 4365174edb0eSDarrick J. Wong /* 4366174edb0eSDarrick J. Wong * If this is a CoW allocation, record the data in 4367174edb0eSDarrick J. Wong * the refcount btree for orphan recovery. 4368174edb0eSDarrick J. Wong */ 4369174edb0eSDarrick J. Wong if (whichfork == XFS_COW_FORK) { 4370174edb0eSDarrick J. Wong error = xfs_refcount_alloc_cow_extent(mp, dfops, 4371174edb0eSDarrick J. Wong bma.blkno, bma.length); 4372174edb0eSDarrick J. Wong if (error) 4373174edb0eSDarrick J. Wong goto error0; 4374174edb0eSDarrick J. Wong } 437530f712c9SDave Chinner } 437630f712c9SDave Chinner 437730f712c9SDave Chinner /* Deal with the allocated space we found. */ 437830f712c9SDave Chinner xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, 437930f712c9SDave Chinner end, n, flags); 438030f712c9SDave Chinner 438130f712c9SDave Chinner /* Execute unwritten extent conversion if necessary */ 438230f712c9SDave Chinner error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); 43832451337dSDave Chinner if (error == -EAGAIN) 438430f712c9SDave Chinner continue; 438530f712c9SDave Chinner if (error) 438630f712c9SDave Chinner goto error0; 438730f712c9SDave Chinner 438830f712c9SDave Chinner /* update the extent map to return */ 438930f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 439030f712c9SDave Chinner 439130f712c9SDave Chinner /* 439230f712c9SDave Chinner * If we're done, stop now. Stop when we've allocated 439330f712c9SDave Chinner * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise 439430f712c9SDave Chinner * the transaction may get too big. 439530f712c9SDave Chinner */ 439630f712c9SDave Chinner if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) 439730f712c9SDave Chinner break; 439830f712c9SDave Chinner 439930f712c9SDave Chinner /* Else go on to the next record. */ 440030f712c9SDave Chinner bma.prev = bma.got; 4401b2b1712aSChristoph Hellwig if (!xfs_iext_next_extent(ifp, &bma.icur, &bma.got)) 44022d58f6efSChristoph Hellwig eof = true; 440330f712c9SDave Chinner } 440430f712c9SDave Chinner *nmap = n; 440530f712c9SDave Chinner 440630f712c9SDave Chinner /* 440730f712c9SDave Chinner * Transform from btree to extents, give it cur. 440830f712c9SDave Chinner */ 440930f712c9SDave Chinner if (xfs_bmap_wants_extents(ip, whichfork)) { 441030f712c9SDave Chinner int tmp_logflags = 0; 441130f712c9SDave Chinner 441230f712c9SDave Chinner ASSERT(bma.cur); 441330f712c9SDave Chinner error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, 441430f712c9SDave Chinner &tmp_logflags, whichfork); 441530f712c9SDave Chinner bma.logflags |= tmp_logflags; 441630f712c9SDave Chinner if (error) 441730f712c9SDave Chinner goto error0; 441830f712c9SDave Chinner } 441930f712c9SDave Chinner 442030f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || 442130f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) > 442230f712c9SDave Chinner XFS_IFORK_MAXEXT(ip, whichfork)); 442330f712c9SDave Chinner error = 0; 442430f712c9SDave Chinner error0: 442530f712c9SDave Chinner /* 442630f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 442730f712c9SDave Chinner * logging the extent records if we've converted to btree format. 442830f712c9SDave Chinner */ 442930f712c9SDave Chinner if ((bma.logflags & xfs_ilog_fext(whichfork)) && 443030f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 443130f712c9SDave Chinner bma.logflags &= ~xfs_ilog_fext(whichfork); 443230f712c9SDave Chinner else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && 443330f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) 443430f712c9SDave Chinner bma.logflags &= ~xfs_ilog_fbroot(whichfork); 443530f712c9SDave Chinner /* 443630f712c9SDave Chinner * Log whatever the flags say, even if error. Otherwise we might miss 443730f712c9SDave Chinner * detecting a case where the data is changed, there's an error, 443830f712c9SDave Chinner * and it's not logged so we don't shutdown when we should. 443930f712c9SDave Chinner */ 444030f712c9SDave Chinner if (bma.logflags) 444130f712c9SDave Chinner xfs_trans_log_inode(tp, ip, bma.logflags); 444230f712c9SDave Chinner 444330f712c9SDave Chinner if (bma.cur) { 444430f712c9SDave Chinner if (!error) { 444530f712c9SDave Chinner ASSERT(*firstblock == NULLFSBLOCK || 4446410d17f6SChristoph Hellwig XFS_FSB_TO_AGNO(mp, *firstblock) <= 444730f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, 4448410d17f6SChristoph Hellwig bma.cur->bc_private.b.firstblock)); 444930f712c9SDave Chinner *firstblock = bma.cur->bc_private.b.firstblock; 445030f712c9SDave Chinner } 445130f712c9SDave Chinner xfs_btree_del_cursor(bma.cur, 445230f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 445330f712c9SDave Chinner } 445430f712c9SDave Chinner if (!error) 445530f712c9SDave Chinner xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, 445630f712c9SDave Chinner orig_nmap, *nmap); 445730f712c9SDave Chinner return error; 445830f712c9SDave Chinner } 445930f712c9SDave Chinner 44606ebd5a44SChristoph Hellwig static int 44616ebd5a44SChristoph Hellwig xfs_bmapi_remap( 44626ebd5a44SChristoph Hellwig struct xfs_trans *tp, 44636ebd5a44SChristoph Hellwig struct xfs_inode *ip, 44646ebd5a44SChristoph Hellwig xfs_fileoff_t bno, 44656ebd5a44SChristoph Hellwig xfs_filblks_t len, 44666ebd5a44SChristoph Hellwig xfs_fsblock_t startblock, 44676ebd5a44SChristoph Hellwig struct xfs_defer_ops *dfops) 44686ebd5a44SChristoph Hellwig { 44696ebd5a44SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 44706ebd5a44SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); 44716ebd5a44SChristoph Hellwig struct xfs_btree_cur *cur = NULL; 44726ebd5a44SChristoph Hellwig xfs_fsblock_t firstblock = NULLFSBLOCK; 44736ebd5a44SChristoph Hellwig struct xfs_bmbt_irec got; 4474b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 44756ebd5a44SChristoph Hellwig int logflags = 0, error; 44766ebd5a44SChristoph Hellwig 44776ebd5a44SChristoph Hellwig ASSERT(len > 0); 44786ebd5a44SChristoph Hellwig ASSERT(len <= (xfs_filblks_t)MAXEXTLEN); 44796ebd5a44SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 44806ebd5a44SChristoph Hellwig 44816ebd5a44SChristoph Hellwig if (unlikely(XFS_TEST_ERROR( 44826ebd5a44SChristoph Hellwig (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS && 44836ebd5a44SChristoph Hellwig XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE), 44849e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 44856ebd5a44SChristoph Hellwig XFS_ERROR_REPORT("xfs_bmapi_remap", XFS_ERRLEVEL_LOW, mp); 44866ebd5a44SChristoph Hellwig return -EFSCORRUPTED; 44876ebd5a44SChristoph Hellwig } 44886ebd5a44SChristoph Hellwig 44896ebd5a44SChristoph Hellwig if (XFS_FORCED_SHUTDOWN(mp)) 44906ebd5a44SChristoph Hellwig return -EIO; 44916ebd5a44SChristoph Hellwig 44926ebd5a44SChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 44936ebd5a44SChristoph Hellwig error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK); 44946ebd5a44SChristoph Hellwig if (error) 44956ebd5a44SChristoph Hellwig return error; 44966ebd5a44SChristoph Hellwig } 44976ebd5a44SChristoph Hellwig 4498b2b1712aSChristoph Hellwig if (xfs_iext_lookup_extent(ip, ifp, bno, &icur, &got)) { 44996ebd5a44SChristoph Hellwig /* make sure we only reflink into a hole. */ 45006ebd5a44SChristoph Hellwig ASSERT(got.br_startoff > bno); 45016ebd5a44SChristoph Hellwig ASSERT(got.br_startoff - bno >= len); 45026ebd5a44SChristoph Hellwig } 45036ebd5a44SChristoph Hellwig 4504bf8eadbaSChristoph Hellwig ip->i_d.di_nblocks += len; 4505bf8eadbaSChristoph Hellwig xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 45066ebd5a44SChristoph Hellwig 45076ebd5a44SChristoph Hellwig if (ifp->if_flags & XFS_IFBROOT) { 45086ebd5a44SChristoph Hellwig cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); 45096ebd5a44SChristoph Hellwig cur->bc_private.b.firstblock = firstblock; 45106ebd5a44SChristoph Hellwig cur->bc_private.b.dfops = dfops; 45116ebd5a44SChristoph Hellwig cur->bc_private.b.flags = 0; 45126ebd5a44SChristoph Hellwig } 45136ebd5a44SChristoph Hellwig 45146ebd5a44SChristoph Hellwig got.br_startoff = bno; 45156ebd5a44SChristoph Hellwig got.br_startblock = startblock; 45166ebd5a44SChristoph Hellwig got.br_blockcount = len; 45176ebd5a44SChristoph Hellwig got.br_state = XFS_EXT_NORM; 45186ebd5a44SChristoph Hellwig 4519b2b1712aSChristoph Hellwig error = xfs_bmap_add_extent_hole_real(tp, ip, XFS_DATA_FORK, &icur, 4520b2b1712aSChristoph Hellwig &cur, &got, &firstblock, dfops, &logflags); 45216ebd5a44SChristoph Hellwig if (error) 45226ebd5a44SChristoph Hellwig goto error0; 45236ebd5a44SChristoph Hellwig 45246ebd5a44SChristoph Hellwig if (xfs_bmap_wants_extents(ip, XFS_DATA_FORK)) { 45256ebd5a44SChristoph Hellwig int tmp_logflags = 0; 45266ebd5a44SChristoph Hellwig 45276ebd5a44SChristoph Hellwig error = xfs_bmap_btree_to_extents(tp, ip, cur, 45286ebd5a44SChristoph Hellwig &tmp_logflags, XFS_DATA_FORK); 45296ebd5a44SChristoph Hellwig logflags |= tmp_logflags; 45306ebd5a44SChristoph Hellwig } 45316ebd5a44SChristoph Hellwig 45326ebd5a44SChristoph Hellwig error0: 45336ebd5a44SChristoph Hellwig if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS) 45346ebd5a44SChristoph Hellwig logflags &= ~XFS_ILOG_DEXT; 45356ebd5a44SChristoph Hellwig else if (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) 45366ebd5a44SChristoph Hellwig logflags &= ~XFS_ILOG_DBROOT; 45376ebd5a44SChristoph Hellwig 45386ebd5a44SChristoph Hellwig if (logflags) 45396ebd5a44SChristoph Hellwig xfs_trans_log_inode(tp, ip, logflags); 45406ebd5a44SChristoph Hellwig if (cur) { 45416ebd5a44SChristoph Hellwig xfs_btree_del_cursor(cur, 45426ebd5a44SChristoph Hellwig error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 45436ebd5a44SChristoph Hellwig } 45446ebd5a44SChristoph Hellwig return error; 45456ebd5a44SChristoph Hellwig } 45466ebd5a44SChristoph Hellwig 454730f712c9SDave Chinner /* 4548a9bd24acSBrian Foster * When a delalloc extent is split (e.g., due to a hole punch), the original 4549a9bd24acSBrian Foster * indlen reservation must be shared across the two new extents that are left 4550a9bd24acSBrian Foster * behind. 4551a9bd24acSBrian Foster * 4552a9bd24acSBrian Foster * Given the original reservation and the worst case indlen for the two new 4553a9bd24acSBrian Foster * extents (as calculated by xfs_bmap_worst_indlen()), split the original 4554d34999c9SBrian Foster * reservation fairly across the two new extents. If necessary, steal available 4555d34999c9SBrian Foster * blocks from a deleted extent to make up a reservation deficiency (e.g., if 4556d34999c9SBrian Foster * ores == 1). The number of stolen blocks is returned. The availability and 4557d34999c9SBrian Foster * subsequent accounting of stolen blocks is the responsibility of the caller. 4558a9bd24acSBrian Foster */ 4559d34999c9SBrian Foster static xfs_filblks_t 4560a9bd24acSBrian Foster xfs_bmap_split_indlen( 4561a9bd24acSBrian Foster xfs_filblks_t ores, /* original res. */ 4562a9bd24acSBrian Foster xfs_filblks_t *indlen1, /* ext1 worst indlen */ 4563d34999c9SBrian Foster xfs_filblks_t *indlen2, /* ext2 worst indlen */ 4564d34999c9SBrian Foster xfs_filblks_t avail) /* stealable blocks */ 4565a9bd24acSBrian Foster { 4566a9bd24acSBrian Foster xfs_filblks_t len1 = *indlen1; 4567a9bd24acSBrian Foster xfs_filblks_t len2 = *indlen2; 4568a9bd24acSBrian Foster xfs_filblks_t nres = len1 + len2; /* new total res. */ 4569d34999c9SBrian Foster xfs_filblks_t stolen = 0; 457075d65361SBrian Foster xfs_filblks_t resfactor; 4571a9bd24acSBrian Foster 4572a9bd24acSBrian Foster /* 4573d34999c9SBrian Foster * Steal as many blocks as we can to try and satisfy the worst case 4574d34999c9SBrian Foster * indlen for both new extents. 4575d34999c9SBrian Foster */ 457675d65361SBrian Foster if (ores < nres && avail) 457775d65361SBrian Foster stolen = XFS_FILBLKS_MIN(nres - ores, avail); 457875d65361SBrian Foster ores += stolen; 457975d65361SBrian Foster 458075d65361SBrian Foster /* nothing else to do if we've satisfied the new reservation */ 458175d65361SBrian Foster if (ores >= nres) 458275d65361SBrian Foster return stolen; 4583d34999c9SBrian Foster 4584d34999c9SBrian Foster /* 458575d65361SBrian Foster * We can't meet the total required reservation for the two extents. 458675d65361SBrian Foster * Calculate the percent of the overall shortage between both extents 458775d65361SBrian Foster * and apply this percentage to each of the requested indlen values. 458875d65361SBrian Foster * This distributes the shortage fairly and reduces the chances that one 458975d65361SBrian Foster * of the two extents is left with nothing when extents are repeatedly 459075d65361SBrian Foster * split. 4591a9bd24acSBrian Foster */ 459275d65361SBrian Foster resfactor = (ores * 100); 459375d65361SBrian Foster do_div(resfactor, nres); 459475d65361SBrian Foster len1 *= resfactor; 459575d65361SBrian Foster do_div(len1, 100); 459675d65361SBrian Foster len2 *= resfactor; 459775d65361SBrian Foster do_div(len2, 100); 459875d65361SBrian Foster ASSERT(len1 + len2 <= ores); 459975d65361SBrian Foster ASSERT(len1 < *indlen1 && len2 < *indlen2); 460075d65361SBrian Foster 460175d65361SBrian Foster /* 460275d65361SBrian Foster * Hand out the remainder to each extent. If one of the two reservations 460375d65361SBrian Foster * is zero, we want to make sure that one gets a block first. The loop 460475d65361SBrian Foster * below starts with len1, so hand len2 a block right off the bat if it 460575d65361SBrian Foster * is zero. 460675d65361SBrian Foster */ 460775d65361SBrian Foster ores -= (len1 + len2); 460875d65361SBrian Foster ASSERT((*indlen1 - len1) + (*indlen2 - len2) >= ores); 460975d65361SBrian Foster if (ores && !len2 && *indlen2) { 461075d65361SBrian Foster len2++; 461175d65361SBrian Foster ores--; 4612a9bd24acSBrian Foster } 461375d65361SBrian Foster while (ores) { 461475d65361SBrian Foster if (len1 < *indlen1) { 461575d65361SBrian Foster len1++; 461675d65361SBrian Foster ores--; 461775d65361SBrian Foster } 461875d65361SBrian Foster if (!ores) 4619a9bd24acSBrian Foster break; 462075d65361SBrian Foster if (len2 < *indlen2) { 462175d65361SBrian Foster len2++; 462275d65361SBrian Foster ores--; 4623a9bd24acSBrian Foster } 4624a9bd24acSBrian Foster } 4625a9bd24acSBrian Foster 4626a9bd24acSBrian Foster *indlen1 = len1; 4627a9bd24acSBrian Foster *indlen2 = len2; 4628d34999c9SBrian Foster 4629d34999c9SBrian Foster return stolen; 4630a9bd24acSBrian Foster } 4631a9bd24acSBrian Foster 4632fa5c836cSChristoph Hellwig int 4633fa5c836cSChristoph Hellwig xfs_bmap_del_extent_delay( 4634fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4635fa5c836cSChristoph Hellwig int whichfork, 4636b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 4637fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 4638fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 4639fa5c836cSChristoph Hellwig { 4640fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 4641fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 4642fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 4643fa5c836cSChristoph Hellwig int64_t da_old, da_new, da_diff = 0; 4644fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 4645fa5c836cSChristoph Hellwig xfs_filblks_t got_indlen, new_indlen, stolen; 4646060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 4647060ea65bSChristoph Hellwig int error = 0; 4648fa5c836cSChristoph Hellwig bool isrt; 4649fa5c836cSChristoph Hellwig 4650fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 4651fa5c836cSChristoph Hellwig 4652fa5c836cSChristoph Hellwig isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 4653fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 4654fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 4655fa5c836cSChristoph Hellwig da_old = startblockval(got->br_startblock); 4656fa5c836cSChristoph Hellwig da_new = 0; 4657fa5c836cSChristoph Hellwig 4658fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 4659fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 4660fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 4661fa5c836cSChristoph Hellwig 4662fa5c836cSChristoph Hellwig if (isrt) { 46634f1adf33SEric Sandeen uint64_t rtexts = XFS_FSB_TO_B(mp, del->br_blockcount); 4664fa5c836cSChristoph Hellwig 4665fa5c836cSChristoph Hellwig do_div(rtexts, mp->m_sb.sb_rextsize); 4666fa5c836cSChristoph Hellwig xfs_mod_frextents(mp, rtexts); 4667fa5c836cSChristoph Hellwig } 4668fa5c836cSChristoph Hellwig 4669fa5c836cSChristoph Hellwig /* 4670fa5c836cSChristoph Hellwig * Update the inode delalloc counter now and wait to update the 4671fa5c836cSChristoph Hellwig * sb counters as we might have to borrow some blocks for the 4672fa5c836cSChristoph Hellwig * indirect block accounting. 4673fa5c836cSChristoph Hellwig */ 46744fd29ec4SDarrick J. Wong error = xfs_trans_reserve_quota_nblks(NULL, ip, 46754fd29ec4SDarrick J. Wong -((long)del->br_blockcount), 0, 4676fa5c836cSChristoph Hellwig isrt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); 46774fd29ec4SDarrick J. Wong if (error) 46784fd29ec4SDarrick J. Wong return error; 4679fa5c836cSChristoph Hellwig ip->i_delayed_blks -= del->br_blockcount; 4680fa5c836cSChristoph Hellwig 4681fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 46820173c689SChristoph Hellwig state |= BMAP_LEFT_FILLING; 4683fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 46840173c689SChristoph Hellwig state |= BMAP_RIGHT_FILLING; 4685fa5c836cSChristoph Hellwig 46860173c689SChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 46870173c689SChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 4688fa5c836cSChristoph Hellwig /* 4689fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 4690fa5c836cSChristoph Hellwig */ 4691c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 4692b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 4693fa5c836cSChristoph Hellwig break; 46940173c689SChristoph Hellwig case BMAP_LEFT_FILLING: 4695fa5c836cSChristoph Hellwig /* 4696fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 4697fa5c836cSChristoph Hellwig */ 4698fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 4699fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4700fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4701fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4702fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 4703b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4704fa5c836cSChristoph Hellwig break; 47050173c689SChristoph Hellwig case BMAP_RIGHT_FILLING: 4706fa5c836cSChristoph Hellwig /* 4707fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 4708fa5c836cSChristoph Hellwig */ 4709fa5c836cSChristoph Hellwig got->br_blockcount = got->br_blockcount - del->br_blockcount; 4710fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4711fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4712fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 4713b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4714fa5c836cSChristoph Hellwig break; 4715fa5c836cSChristoph Hellwig case 0: 4716fa5c836cSChristoph Hellwig /* 4717fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 4718fa5c836cSChristoph Hellwig * 4719fa5c836cSChristoph Hellwig * Distribute the original indlen reservation across the two new 4720fa5c836cSChristoph Hellwig * extents. Steal blocks from the deleted extent if necessary. 4721fa5c836cSChristoph Hellwig * Stealing blocks simply fudges the fdblocks accounting below. 4722fa5c836cSChristoph Hellwig * Warn if either of the new indlen reservations is zero as this 4723fa5c836cSChristoph Hellwig * can lead to delalloc problems. 4724fa5c836cSChristoph Hellwig */ 4725fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 4726fa5c836cSChristoph Hellwig got_indlen = xfs_bmap_worst_indlen(ip, got->br_blockcount); 4727fa5c836cSChristoph Hellwig 4728fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 4729fa5c836cSChristoph Hellwig new_indlen = xfs_bmap_worst_indlen(ip, new.br_blockcount); 4730fa5c836cSChristoph Hellwig 4731fa5c836cSChristoph Hellwig WARN_ON_ONCE(!got_indlen || !new_indlen); 4732fa5c836cSChristoph Hellwig stolen = xfs_bmap_split_indlen(da_old, &got_indlen, &new_indlen, 4733fa5c836cSChristoph Hellwig del->br_blockcount); 4734fa5c836cSChristoph Hellwig 4735fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)got_indlen); 4736fa5c836cSChristoph Hellwig 4737fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 4738fa5c836cSChristoph Hellwig new.br_state = got->br_state; 4739fa5c836cSChristoph Hellwig new.br_startblock = nullstartblock((int)new_indlen); 4740fa5c836cSChristoph Hellwig 4741b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4742b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 47430254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &new, state); 4744fa5c836cSChristoph Hellwig 4745fa5c836cSChristoph Hellwig da_new = got_indlen + new_indlen - stolen; 4746fa5c836cSChristoph Hellwig del->br_blockcount -= stolen; 4747fa5c836cSChristoph Hellwig break; 4748fa5c836cSChristoph Hellwig } 4749fa5c836cSChristoph Hellwig 4750fa5c836cSChristoph Hellwig ASSERT(da_old >= da_new); 4751fa5c836cSChristoph Hellwig da_diff = da_old - da_new; 4752fa5c836cSChristoph Hellwig if (!isrt) 4753fa5c836cSChristoph Hellwig da_diff += del->br_blockcount; 4754fa5c836cSChristoph Hellwig if (da_diff) 4755fa5c836cSChristoph Hellwig xfs_mod_fdblocks(mp, da_diff, false); 4756fa5c836cSChristoph Hellwig return error; 4757fa5c836cSChristoph Hellwig } 4758fa5c836cSChristoph Hellwig 4759fa5c836cSChristoph Hellwig void 4760fa5c836cSChristoph Hellwig xfs_bmap_del_extent_cow( 4761fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4762b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 4763fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 4764fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 4765fa5c836cSChristoph Hellwig { 4766fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 4767fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); 4768fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 4769fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 4770fa5c836cSChristoph Hellwig int state = BMAP_COWFORK; 4771fa5c836cSChristoph Hellwig 4772fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 4773fa5c836cSChristoph Hellwig 4774fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 4775fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 4776fa5c836cSChristoph Hellwig 4777fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 4778fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 4779fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 4780fa5c836cSChristoph Hellwig ASSERT(!isnullstartblock(got->br_startblock)); 4781fa5c836cSChristoph Hellwig 4782fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 47830173c689SChristoph Hellwig state |= BMAP_LEFT_FILLING; 4784fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 47850173c689SChristoph Hellwig state |= BMAP_RIGHT_FILLING; 4786fa5c836cSChristoph Hellwig 47870173c689SChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 47880173c689SChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 4789fa5c836cSChristoph Hellwig /* 4790fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 4791fa5c836cSChristoph Hellwig */ 4792c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 4793b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 4794fa5c836cSChristoph Hellwig break; 47950173c689SChristoph Hellwig case BMAP_LEFT_FILLING: 4796fa5c836cSChristoph Hellwig /* 4797fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 4798fa5c836cSChristoph Hellwig */ 4799fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 4800fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4801fa5c836cSChristoph Hellwig got->br_startblock = del->br_startblock + del->br_blockcount; 4802b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4803fa5c836cSChristoph Hellwig break; 48040173c689SChristoph Hellwig case BMAP_RIGHT_FILLING: 4805fa5c836cSChristoph Hellwig /* 4806fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 4807fa5c836cSChristoph Hellwig */ 4808fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4809b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4810fa5c836cSChristoph Hellwig break; 4811fa5c836cSChristoph Hellwig case 0: 4812fa5c836cSChristoph Hellwig /* 4813fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 4814fa5c836cSChristoph Hellwig */ 4815fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 4816fa5c836cSChristoph Hellwig 4817fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 4818fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 4819fa5c836cSChristoph Hellwig new.br_state = got->br_state; 4820fa5c836cSChristoph Hellwig new.br_startblock = del->br_startblock + del->br_blockcount; 4821fa5c836cSChristoph Hellwig 4822b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4823b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 48240254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &new, state); 4825fa5c836cSChristoph Hellwig break; 4826fa5c836cSChristoph Hellwig } 4827fa5c836cSChristoph Hellwig } 4828fa5c836cSChristoph Hellwig 4829a9bd24acSBrian Foster /* 483030f712c9SDave Chinner * Called by xfs_bmapi to update file extent records and the btree 4831e1d7553fSChristoph Hellwig * after removing space. 483230f712c9SDave Chinner */ 483330f712c9SDave Chinner STATIC int /* error */ 4834e1d7553fSChristoph Hellwig xfs_bmap_del_extent_real( 483530f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 483630f712c9SDave Chinner xfs_trans_t *tp, /* current transaction pointer */ 4837b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 48382c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops, /* list of extents to be freed */ 483930f712c9SDave Chinner xfs_btree_cur_t *cur, /* if null, not a btree */ 484030f712c9SDave Chinner xfs_bmbt_irec_t *del, /* data to remove from extents */ 484130f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 48424847acf8SDarrick J. Wong int whichfork, /* data or attr fork */ 48434847acf8SDarrick J. Wong int bflags) /* bmapi flags */ 484430f712c9SDave Chinner { 484530f712c9SDave Chinner xfs_fsblock_t del_endblock=0; /* first block past del */ 484630f712c9SDave Chinner xfs_fileoff_t del_endoff; /* first offset past del */ 484730f712c9SDave Chinner int do_fx; /* free extent at end of routine */ 484830f712c9SDave Chinner int error; /* error return value */ 48491b24b633SChristoph Hellwig int flags = 0;/* inode logging flags */ 485048fd52b1SChristoph Hellwig struct xfs_bmbt_irec got; /* current extent entry */ 485130f712c9SDave Chinner xfs_fileoff_t got_endoff; /* first offset past got */ 485230f712c9SDave Chinner int i; /* temp state */ 485330f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 485430f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 485530f712c9SDave Chinner xfs_filblks_t nblks; /* quota/sb block count */ 485630f712c9SDave Chinner xfs_bmbt_irec_t new; /* new record to be inserted */ 485730f712c9SDave Chinner /* REFERENCED */ 485830f712c9SDave Chinner uint qfield; /* quota field to update */ 4859060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 486048fd52b1SChristoph Hellwig struct xfs_bmbt_irec old; 486130f712c9SDave Chinner 4862ff6d6af2SBill O'Donnell mp = ip->i_mount; 4863ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_del_exlist); 486430f712c9SDave Chinner 486530f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 486630f712c9SDave Chinner ASSERT(del->br_blockcount > 0); 4867b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, icur, &got); 486830f712c9SDave Chinner ASSERT(got.br_startoff <= del->br_startoff); 486930f712c9SDave Chinner del_endoff = del->br_startoff + del->br_blockcount; 487030f712c9SDave Chinner got_endoff = got.br_startoff + got.br_blockcount; 487130f712c9SDave Chinner ASSERT(got_endoff >= del_endoff); 4872e1d7553fSChristoph Hellwig ASSERT(!isnullstartblock(got.br_startblock)); 487330f712c9SDave Chinner qfield = 0; 487430f712c9SDave Chinner error = 0; 4875e1d7553fSChristoph Hellwig 48761b24b633SChristoph Hellwig /* 48771b24b633SChristoph Hellwig * If it's the case where the directory code is running with no block 48781b24b633SChristoph Hellwig * reservation, and the deleted block is in the middle of its extent, 48791b24b633SChristoph Hellwig * and the resulting insert of an extent would cause transformation to 48801b24b633SChristoph Hellwig * btree format, then reject it. The calling code will then swap blocks 48811b24b633SChristoph Hellwig * around instead. We have to do this now, rather than waiting for the 48821b24b633SChristoph Hellwig * conversion to btree format, since the transaction will be dirty then. 48831b24b633SChristoph Hellwig */ 48841b24b633SChristoph Hellwig if (tp->t_blk_res == 0 && 48851b24b633SChristoph Hellwig XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && 48861b24b633SChristoph Hellwig XFS_IFORK_NEXTENTS(ip, whichfork) >= 48871b24b633SChristoph Hellwig XFS_IFORK_MAXEXT(ip, whichfork) && 48881b24b633SChristoph Hellwig del->br_startoff > got.br_startoff && del_endoff < got_endoff) 48891b24b633SChristoph Hellwig return -ENOSPC; 48901b24b633SChristoph Hellwig 48911b24b633SChristoph Hellwig flags = XFS_ILOG_CORE; 489230f712c9SDave Chinner if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { 489330f712c9SDave Chinner xfs_fsblock_t bno; 489430f712c9SDave Chinner xfs_filblks_t len; 489530f712c9SDave Chinner 4896e1d7553fSChristoph Hellwig ASSERT(do_mod(del->br_blockcount, mp->m_sb.sb_rextsize) == 0); 4897e1d7553fSChristoph Hellwig ASSERT(do_mod(del->br_startblock, mp->m_sb.sb_rextsize) == 0); 489830f712c9SDave Chinner bno = del->br_startblock; 489930f712c9SDave Chinner len = del->br_blockcount; 490030f712c9SDave Chinner do_div(bno, mp->m_sb.sb_rextsize); 490130f712c9SDave Chinner do_div(len, mp->m_sb.sb_rextsize); 490230f712c9SDave Chinner error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); 490330f712c9SDave Chinner if (error) 490430f712c9SDave Chinner goto done; 490530f712c9SDave Chinner do_fx = 0; 490630f712c9SDave Chinner nblks = len * mp->m_sb.sb_rextsize; 490730f712c9SDave Chinner qfield = XFS_TRANS_DQ_RTBCOUNT; 4908e1d7553fSChristoph Hellwig } else { 490930f712c9SDave Chinner do_fx = 1; 491030f712c9SDave Chinner nblks = del->br_blockcount; 491130f712c9SDave Chinner qfield = XFS_TRANS_DQ_BCOUNT; 491230f712c9SDave Chinner } 4913e1d7553fSChristoph Hellwig 491430f712c9SDave Chinner del_endblock = del->br_startblock + del->br_blockcount; 491530f712c9SDave Chinner if (cur) { 4916e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &got, &i); 4917e1d7553fSChristoph Hellwig if (error) 491830f712c9SDave Chinner goto done; 4919c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 492030f712c9SDave Chinner } 4921340785ccSDarrick J. Wong 4922491f6f8aSChristoph Hellwig if (got.br_startoff == del->br_startoff) 4923491f6f8aSChristoph Hellwig state |= BMAP_LEFT_FILLING; 4924491f6f8aSChristoph Hellwig if (got_endoff == del_endoff) 4925491f6f8aSChristoph Hellwig state |= BMAP_RIGHT_FILLING; 4926491f6f8aSChristoph Hellwig 4927491f6f8aSChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 4928491f6f8aSChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 492930f712c9SDave Chinner /* 493030f712c9SDave Chinner * Matches the whole extent. Delete the entry. 493130f712c9SDave Chinner */ 4932c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 4933b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 493430f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 493530f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 493630f712c9SDave Chinner flags |= XFS_ILOG_CORE; 493730f712c9SDave Chinner if (!cur) { 493830f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 493930f712c9SDave Chinner break; 494030f712c9SDave Chinner } 494130f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 494230f712c9SDave Chinner goto done; 4943c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 494430f712c9SDave Chinner break; 4945491f6f8aSChristoph Hellwig case BMAP_LEFT_FILLING: 494630f712c9SDave Chinner /* 494730f712c9SDave Chinner * Deleting the first part of the extent. 494830f712c9SDave Chinner */ 494948fd52b1SChristoph Hellwig got.br_startoff = del_endoff; 495048fd52b1SChristoph Hellwig got.br_startblock = del_endblock; 495148fd52b1SChristoph Hellwig got.br_blockcount -= del->br_blockcount; 4952b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &got); 495330f712c9SDave Chinner if (!cur) { 495430f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 495530f712c9SDave Chinner break; 495630f712c9SDave Chinner } 4957a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 495848fd52b1SChristoph Hellwig if (error) 495930f712c9SDave Chinner goto done; 496030f712c9SDave Chinner break; 4961491f6f8aSChristoph Hellwig case BMAP_RIGHT_FILLING: 496230f712c9SDave Chinner /* 496330f712c9SDave Chinner * Deleting the last part of the extent. 496430f712c9SDave Chinner */ 496548fd52b1SChristoph Hellwig got.br_blockcount -= del->br_blockcount; 4966b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &got); 496730f712c9SDave Chinner if (!cur) { 496830f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 496930f712c9SDave Chinner break; 497030f712c9SDave Chinner } 4971a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 497248fd52b1SChristoph Hellwig if (error) 497330f712c9SDave Chinner goto done; 497430f712c9SDave Chinner break; 497530f712c9SDave Chinner case 0: 497630f712c9SDave Chinner /* 497730f712c9SDave Chinner * Deleting the middle of the extent. 497830f712c9SDave Chinner */ 497948fd52b1SChristoph Hellwig old = got; 4980ca5d8e5bSChristoph Hellwig 498148fd52b1SChristoph Hellwig got.br_blockcount = del->br_startoff - got.br_startoff; 4982b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &got); 498348fd52b1SChristoph Hellwig 498430f712c9SDave Chinner new.br_startoff = del_endoff; 498548fd52b1SChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 498630f712c9SDave Chinner new.br_state = got.br_state; 498730f712c9SDave Chinner new.br_startblock = del_endblock; 498848fd52b1SChristoph Hellwig 498930f712c9SDave Chinner flags |= XFS_ILOG_CORE; 499030f712c9SDave Chinner if (cur) { 4991a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 4992e1d7553fSChristoph Hellwig if (error) 499330f712c9SDave Chinner goto done; 4994e1d7553fSChristoph Hellwig error = xfs_btree_increment(cur, 0, &i); 4995e1d7553fSChristoph Hellwig if (error) 499630f712c9SDave Chinner goto done; 499730f712c9SDave Chinner cur->bc_rec.b = new; 499830f712c9SDave Chinner error = xfs_btree_insert(cur, &i); 49992451337dSDave Chinner if (error && error != -ENOSPC) 500030f712c9SDave Chinner goto done; 500130f712c9SDave Chinner /* 5002e1d7553fSChristoph Hellwig * If get no-space back from btree insert, it tried a 5003e1d7553fSChristoph Hellwig * split, and we have a zero block reservation. Fix up 5004e1d7553fSChristoph Hellwig * our state and return the error. 500530f712c9SDave Chinner */ 50062451337dSDave Chinner if (error == -ENOSPC) { 500730f712c9SDave Chinner /* 5008e1d7553fSChristoph Hellwig * Reset the cursor, don't trust it after any 5009e1d7553fSChristoph Hellwig * insert operation. 501030f712c9SDave Chinner */ 5011e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &got, &i); 5012e1d7553fSChristoph Hellwig if (error) 501330f712c9SDave Chinner goto done; 5014e1d7553fSChristoph Hellwig XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 501530f712c9SDave Chinner /* 501630f712c9SDave Chinner * Update the btree record back 501730f712c9SDave Chinner * to the original value. 501830f712c9SDave Chinner */ 5019a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &old); 5020e1d7553fSChristoph Hellwig if (error) 502130f712c9SDave Chinner goto done; 502230f712c9SDave Chinner /* 502330f712c9SDave Chinner * Reset the extent record back 502430f712c9SDave Chinner * to the original value. 502530f712c9SDave Chinner */ 5026b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &old); 502730f712c9SDave Chinner flags = 0; 50282451337dSDave Chinner error = -ENOSPC; 502930f712c9SDave Chinner goto done; 503030f712c9SDave Chinner } 5031c29aad41SEric Sandeen XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); 503230f712c9SDave Chinner } else 503330f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 503430f712c9SDave Chinner XFS_IFORK_NEXT_SET(ip, whichfork, 503530f712c9SDave Chinner XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 5036b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 50370254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &new, state); 503830f712c9SDave Chinner break; 503930f712c9SDave Chinner } 50409c194644SDarrick J. Wong 50419c194644SDarrick J. Wong /* remove reverse mapping */ 50429c194644SDarrick J. Wong error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, del); 50439c194644SDarrick J. Wong if (error) 50449c194644SDarrick J. Wong goto done; 50459c194644SDarrick J. Wong 504630f712c9SDave Chinner /* 504730f712c9SDave Chinner * If we need to, add to list of extents to delete. 504830f712c9SDave Chinner */ 50494847acf8SDarrick J. Wong if (do_fx && !(bflags & XFS_BMAPI_REMAP)) { 505062aab20fSDarrick J. Wong if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) { 505162aab20fSDarrick J. Wong error = xfs_refcount_decrease_extent(mp, dfops, del); 505262aab20fSDarrick J. Wong if (error) 505362aab20fSDarrick J. Wong goto done; 505462aab20fSDarrick J. Wong } else 50552c3234d1SDarrick J. Wong xfs_bmap_add_free(mp, dfops, del->br_startblock, 5056340785ccSDarrick J. Wong del->br_blockcount, NULL); 505762aab20fSDarrick J. Wong } 505862aab20fSDarrick J. Wong 505930f712c9SDave Chinner /* 506030f712c9SDave Chinner * Adjust inode # blocks in the file. 506130f712c9SDave Chinner */ 506230f712c9SDave Chinner if (nblks) 506330f712c9SDave Chinner ip->i_d.di_nblocks -= nblks; 506430f712c9SDave Chinner /* 506530f712c9SDave Chinner * Adjust quota data. 506630f712c9SDave Chinner */ 50674847acf8SDarrick J. Wong if (qfield && !(bflags & XFS_BMAPI_REMAP)) 506830f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); 506930f712c9SDave Chinner 507030f712c9SDave Chinner done: 507130f712c9SDave Chinner *logflagsp = flags; 507230f712c9SDave Chinner return error; 507330f712c9SDave Chinner } 507430f712c9SDave Chinner 507530f712c9SDave Chinner /* 507630f712c9SDave Chinner * Unmap (remove) blocks from a file. 507730f712c9SDave Chinner * If nexts is nonzero then the number of extents to remove is limited to 507830f712c9SDave Chinner * that value. If not all extents in the block range can be removed then 507930f712c9SDave Chinner * *done is set. 508030f712c9SDave Chinner */ 508130f712c9SDave Chinner int /* error */ 50824453593bSDarrick J. Wong __xfs_bunmapi( 508330f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 508430f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 50858280f6edSChristoph Hellwig xfs_fileoff_t start, /* first file offset deleted */ 50864453593bSDarrick J. Wong xfs_filblks_t *rlen, /* i/o: amount remaining */ 508730f712c9SDave Chinner int flags, /* misc flags */ 508830f712c9SDave Chinner xfs_extnum_t nexts, /* number of extents max */ 508930f712c9SDave Chinner xfs_fsblock_t *firstblock, /* first allocated block 509030f712c9SDave Chinner controls a.g. for allocs */ 50914453593bSDarrick J. Wong struct xfs_defer_ops *dfops) /* i/o: deferred updates */ 509230f712c9SDave Chinner { 509330f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 509430f712c9SDave Chinner xfs_bmbt_irec_t del; /* extent being deleted */ 509530f712c9SDave Chinner int error; /* error return value */ 509630f712c9SDave Chinner xfs_extnum_t extno; /* extent number in list */ 509730f712c9SDave Chinner xfs_bmbt_irec_t got; /* current extent record */ 509830f712c9SDave Chinner xfs_ifork_t *ifp; /* inode fork pointer */ 509930f712c9SDave Chinner int isrt; /* freeing in rt area */ 510030f712c9SDave Chinner int logflags; /* transaction logging flags */ 510130f712c9SDave Chinner xfs_extlen_t mod; /* rt extent offset */ 510230f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 510330f712c9SDave Chinner int tmp_logflags; /* partial logging flags */ 510430f712c9SDave Chinner int wasdel; /* was a delayed alloc extent */ 510530f712c9SDave Chinner int whichfork; /* data or attribute fork */ 510630f712c9SDave Chinner xfs_fsblock_t sum; 51074453593bSDarrick J. Wong xfs_filblks_t len = *rlen; /* length to unmap in file */ 5108e1a4e37cSDarrick J. Wong xfs_fileoff_t max_len; 51095b094d6dSChristoph Hellwig xfs_agnumber_t prev_agno = NULLAGNUMBER, agno; 51108280f6edSChristoph Hellwig xfs_fileoff_t end; 5111b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 5112b2b1712aSChristoph Hellwig bool done = false; 511330f712c9SDave Chinner 51148280f6edSChristoph Hellwig trace_xfs_bunmap(ip, start, len, flags, _RET_IP_); 511530f712c9SDave Chinner 51163993baebSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 51173993baebSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 511830f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 511930f712c9SDave Chinner if (unlikely( 512030f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 512130f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { 512230f712c9SDave Chinner XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, 512330f712c9SDave Chinner ip->i_mount); 51242451337dSDave Chinner return -EFSCORRUPTED; 512530f712c9SDave Chinner } 512630f712c9SDave Chinner mp = ip->i_mount; 512730f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 51282451337dSDave Chinner return -EIO; 512930f712c9SDave Chinner 513030f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 513130f712c9SDave Chinner ASSERT(len > 0); 513230f712c9SDave Chinner ASSERT(nexts >= 0); 513330f712c9SDave Chinner 5134e1a4e37cSDarrick J. Wong /* 5135e1a4e37cSDarrick J. Wong * Guesstimate how many blocks we can unmap without running the risk of 5136e1a4e37cSDarrick J. Wong * blowing out the transaction with a mix of EFIs and reflink 5137e1a4e37cSDarrick J. Wong * adjustments. 5138e1a4e37cSDarrick J. Wong */ 5139e1a4e37cSDarrick J. Wong if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) 5140e1a4e37cSDarrick J. Wong max_len = min(len, xfs_refcount_max_unmap(tp->t_log_res)); 5141e1a4e37cSDarrick J. Wong else 5142e1a4e37cSDarrick J. Wong max_len = len; 5143e1a4e37cSDarrick J. Wong 514430f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS) && 514530f712c9SDave Chinner (error = xfs_iread_extents(tp, ip, whichfork))) 514630f712c9SDave Chinner return error; 51475d829300SEric Sandeen if (xfs_iext_count(ifp) == 0) { 51484453593bSDarrick J. Wong *rlen = 0; 514930f712c9SDave Chinner return 0; 515030f712c9SDave Chinner } 5151ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_unmap); 515230f712c9SDave Chinner isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 5153dc56015fSChristoph Hellwig end = start + len; 515430f712c9SDave Chinner 5155b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent_before(ip, ifp, &end, &icur, &got)) { 5156dc56015fSChristoph Hellwig *rlen = 0; 5157dc56015fSChristoph Hellwig return 0; 515830f712c9SDave Chinner } 5159dc56015fSChristoph Hellwig end--; 51607efc7945SChristoph Hellwig 516130f712c9SDave Chinner logflags = 0; 516230f712c9SDave Chinner if (ifp->if_flags & XFS_IFBROOT) { 516330f712c9SDave Chinner ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); 516430f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 516530f712c9SDave Chinner cur->bc_private.b.firstblock = *firstblock; 51662c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 516730f712c9SDave Chinner cur->bc_private.b.flags = 0; 516830f712c9SDave Chinner } else 516930f712c9SDave Chinner cur = NULL; 517030f712c9SDave Chinner 517130f712c9SDave Chinner if (isrt) { 517230f712c9SDave Chinner /* 517330f712c9SDave Chinner * Synchronize by locking the bitmap inode. 517430f712c9SDave Chinner */ 5175f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); 517630f712c9SDave Chinner xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); 5177f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); 5178f4a0660dSDarrick J. Wong xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); 517930f712c9SDave Chinner } 518030f712c9SDave Chinner 518130f712c9SDave Chinner extno = 0; 5182b2b1712aSChristoph Hellwig while (end != (xfs_fileoff_t)-1 && end >= start && 5183e1a4e37cSDarrick J. Wong (nexts == 0 || extno < nexts) && max_len > 0) { 518430f712c9SDave Chinner /* 51858280f6edSChristoph Hellwig * Is the found extent after a hole in which end lives? 518630f712c9SDave Chinner * Just back up to the previous extent, if so. 518730f712c9SDave Chinner */ 5188b2b1712aSChristoph Hellwig if (got.br_startoff > end && 5189b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got)) { 5190b2b1712aSChristoph Hellwig done = true; 519130f712c9SDave Chinner break; 519230f712c9SDave Chinner } 519330f712c9SDave Chinner /* 519430f712c9SDave Chinner * Is the last block of this extent before the range 519530f712c9SDave Chinner * we're supposed to delete? If so, we're done. 519630f712c9SDave Chinner */ 51978280f6edSChristoph Hellwig end = XFS_FILEOFF_MIN(end, 519830f712c9SDave Chinner got.br_startoff + got.br_blockcount - 1); 51998280f6edSChristoph Hellwig if (end < start) 520030f712c9SDave Chinner break; 520130f712c9SDave Chinner /* 520230f712c9SDave Chinner * Then deal with the (possibly delayed) allocated space 520330f712c9SDave Chinner * we found. 520430f712c9SDave Chinner */ 520530f712c9SDave Chinner del = got; 520630f712c9SDave Chinner wasdel = isnullstartblock(del.br_startblock); 52075b094d6dSChristoph Hellwig 52085b094d6dSChristoph Hellwig /* 52095b094d6dSChristoph Hellwig * Make sure we don't touch multiple AGF headers out of order 52105b094d6dSChristoph Hellwig * in a single transaction, as that could cause AB-BA deadlocks. 52115b094d6dSChristoph Hellwig */ 52125b094d6dSChristoph Hellwig if (!wasdel) { 52135b094d6dSChristoph Hellwig agno = XFS_FSB_TO_AGNO(mp, del.br_startblock); 52145b094d6dSChristoph Hellwig if (prev_agno != NULLAGNUMBER && prev_agno > agno) 52155b094d6dSChristoph Hellwig break; 52165b094d6dSChristoph Hellwig prev_agno = agno; 52175b094d6dSChristoph Hellwig } 521830f712c9SDave Chinner if (got.br_startoff < start) { 521930f712c9SDave Chinner del.br_startoff = start; 522030f712c9SDave Chinner del.br_blockcount -= start - got.br_startoff; 522130f712c9SDave Chinner if (!wasdel) 522230f712c9SDave Chinner del.br_startblock += start - got.br_startoff; 522330f712c9SDave Chinner } 52248280f6edSChristoph Hellwig if (del.br_startoff + del.br_blockcount > end + 1) 52258280f6edSChristoph Hellwig del.br_blockcount = end + 1 - del.br_startoff; 5226e1a4e37cSDarrick J. Wong 5227e1a4e37cSDarrick J. Wong /* How much can we safely unmap? */ 5228e1a4e37cSDarrick J. Wong if (max_len < del.br_blockcount) { 5229e1a4e37cSDarrick J. Wong del.br_startoff += del.br_blockcount - max_len; 5230e1a4e37cSDarrick J. Wong if (!wasdel) 5231e1a4e37cSDarrick J. Wong del.br_startblock += del.br_blockcount - max_len; 5232e1a4e37cSDarrick J. Wong del.br_blockcount = max_len; 5233e1a4e37cSDarrick J. Wong } 5234e1a4e37cSDarrick J. Wong 523530f712c9SDave Chinner sum = del.br_startblock + del.br_blockcount; 523630f712c9SDave Chinner if (isrt && 523730f712c9SDave Chinner (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { 523830f712c9SDave Chinner /* 523930f712c9SDave Chinner * Realtime extent not lined up at the end. 524030f712c9SDave Chinner * The extent could have been split into written 524130f712c9SDave Chinner * and unwritten pieces, or we could just be 524230f712c9SDave Chinner * unmapping part of it. But we can't really 524330f712c9SDave Chinner * get rid of part of a realtime extent. 524430f712c9SDave Chinner */ 524530f712c9SDave Chinner if (del.br_state == XFS_EXT_UNWRITTEN || 524630f712c9SDave Chinner !xfs_sb_version_hasextflgbit(&mp->m_sb)) { 524730f712c9SDave Chinner /* 524830f712c9SDave Chinner * This piece is unwritten, or we're not 524930f712c9SDave Chinner * using unwritten extents. Skip over it. 525030f712c9SDave Chinner */ 52518280f6edSChristoph Hellwig ASSERT(end >= mod); 52528280f6edSChristoph Hellwig end -= mod > del.br_blockcount ? 525330f712c9SDave Chinner del.br_blockcount : mod; 5254b2b1712aSChristoph Hellwig if (end < got.br_startoff && 5255b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got)) { 5256b2b1712aSChristoph Hellwig done = true; 5257b2b1712aSChristoph Hellwig break; 525830f712c9SDave Chinner } 525930f712c9SDave Chinner continue; 526030f712c9SDave Chinner } 526130f712c9SDave Chinner /* 526230f712c9SDave Chinner * It's written, turn it unwritten. 526330f712c9SDave Chinner * This is better than zeroing it. 526430f712c9SDave Chinner */ 526530f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 5266a7e5d03bSChristoph Hellwig ASSERT(tp->t_blk_res > 0); 526730f712c9SDave Chinner /* 526830f712c9SDave Chinner * If this spans a realtime extent boundary, 526930f712c9SDave Chinner * chop it back to the start of the one we end at. 527030f712c9SDave Chinner */ 527130f712c9SDave Chinner if (del.br_blockcount > mod) { 527230f712c9SDave Chinner del.br_startoff += del.br_blockcount - mod; 527330f712c9SDave Chinner del.br_startblock += del.br_blockcount - mod; 527430f712c9SDave Chinner del.br_blockcount = mod; 527530f712c9SDave Chinner } 527630f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 527730f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, ip, 5278b2b1712aSChristoph Hellwig whichfork, &icur, &cur, &del, 527905a630d7SDarrick J. Wong firstblock, dfops, &logflags); 528030f712c9SDave Chinner if (error) 528130f712c9SDave Chinner goto error0; 528230f712c9SDave Chinner goto nodelete; 528330f712c9SDave Chinner } 528430f712c9SDave Chinner if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { 528530f712c9SDave Chinner /* 528630f712c9SDave Chinner * Realtime extent is lined up at the end but not 528730f712c9SDave Chinner * at the front. We'll get rid of full extents if 528830f712c9SDave Chinner * we can. 528930f712c9SDave Chinner */ 529030f712c9SDave Chinner mod = mp->m_sb.sb_rextsize - mod; 529130f712c9SDave Chinner if (del.br_blockcount > mod) { 529230f712c9SDave Chinner del.br_blockcount -= mod; 529330f712c9SDave Chinner del.br_startoff += mod; 529430f712c9SDave Chinner del.br_startblock += mod; 529530f712c9SDave Chinner } else if ((del.br_startoff == start && 529630f712c9SDave Chinner (del.br_state == XFS_EXT_UNWRITTEN || 5297a7e5d03bSChristoph Hellwig tp->t_blk_res == 0)) || 529830f712c9SDave Chinner !xfs_sb_version_hasextflgbit(&mp->m_sb)) { 529930f712c9SDave Chinner /* 530030f712c9SDave Chinner * Can't make it unwritten. There isn't 530130f712c9SDave Chinner * a full extent here so just skip it. 530230f712c9SDave Chinner */ 53038280f6edSChristoph Hellwig ASSERT(end >= del.br_blockcount); 53048280f6edSChristoph Hellwig end -= del.br_blockcount; 5305b2b1712aSChristoph Hellwig if (got.br_startoff > end && 5306b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got)) { 5307b2b1712aSChristoph Hellwig done = true; 5308b2b1712aSChristoph Hellwig break; 5309b2b1712aSChristoph Hellwig } 531030f712c9SDave Chinner continue; 531130f712c9SDave Chinner } else if (del.br_state == XFS_EXT_UNWRITTEN) { 53127efc7945SChristoph Hellwig struct xfs_bmbt_irec prev; 53137efc7945SChristoph Hellwig 531430f712c9SDave Chinner /* 531530f712c9SDave Chinner * This one is already unwritten. 531630f712c9SDave Chinner * It must have a written left neighbor. 531730f712c9SDave Chinner * Unwrite the killed part of that one and 531830f712c9SDave Chinner * try again. 531930f712c9SDave Chinner */ 5320b2b1712aSChristoph Hellwig if (!xfs_iext_prev_extent(ifp, &icur, &prev)) 5321b2b1712aSChristoph Hellwig ASSERT(0); 532230f712c9SDave Chinner ASSERT(prev.br_state == XFS_EXT_NORM); 532330f712c9SDave Chinner ASSERT(!isnullstartblock(prev.br_startblock)); 532430f712c9SDave Chinner ASSERT(del.br_startblock == 532530f712c9SDave Chinner prev.br_startblock + prev.br_blockcount); 532630f712c9SDave Chinner if (prev.br_startoff < start) { 532730f712c9SDave Chinner mod = start - prev.br_startoff; 532830f712c9SDave Chinner prev.br_blockcount -= mod; 532930f712c9SDave Chinner prev.br_startblock += mod; 533030f712c9SDave Chinner prev.br_startoff = start; 533130f712c9SDave Chinner } 533230f712c9SDave Chinner prev.br_state = XFS_EXT_UNWRITTEN; 533330f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 5334b2b1712aSChristoph Hellwig ip, whichfork, &icur, &cur, 533505a630d7SDarrick J. Wong &prev, firstblock, dfops, 533605a630d7SDarrick J. Wong &logflags); 533730f712c9SDave Chinner if (error) 533830f712c9SDave Chinner goto error0; 533930f712c9SDave Chinner goto nodelete; 534030f712c9SDave Chinner } else { 534130f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 534230f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 534330f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 5344b2b1712aSChristoph Hellwig ip, whichfork, &icur, &cur, 534505a630d7SDarrick J. Wong &del, firstblock, dfops, 534605a630d7SDarrick J. Wong &logflags); 534730f712c9SDave Chinner if (error) 534830f712c9SDave Chinner goto error0; 534930f712c9SDave Chinner goto nodelete; 535030f712c9SDave Chinner } 535130f712c9SDave Chinner } 535230f712c9SDave Chinner 5353e1d7553fSChristoph Hellwig if (wasdel) { 5354b2b1712aSChristoph Hellwig error = xfs_bmap_del_extent_delay(ip, whichfork, &icur, 5355e1d7553fSChristoph Hellwig &got, &del); 5356e1d7553fSChristoph Hellwig } else { 5357b2b1712aSChristoph Hellwig error = xfs_bmap_del_extent_real(ip, tp, &icur, dfops, 5358e1d7553fSChristoph Hellwig cur, &del, &tmp_logflags, whichfork, 5359e1d7553fSChristoph Hellwig flags); 536030f712c9SDave Chinner logflags |= tmp_logflags; 5361e1d7553fSChristoph Hellwig } 5362e1d7553fSChristoph Hellwig 536330f712c9SDave Chinner if (error) 536430f712c9SDave Chinner goto error0; 5365b2706a05SBrian Foster 5366e1a4e37cSDarrick J. Wong max_len -= del.br_blockcount; 53678280f6edSChristoph Hellwig end = del.br_startoff - 1; 536830f712c9SDave Chinner nodelete: 536930f712c9SDave Chinner /* 537030f712c9SDave Chinner * If not done go on to the next (previous) record. 537130f712c9SDave Chinner */ 53728280f6edSChristoph Hellwig if (end != (xfs_fileoff_t)-1 && end >= start) { 5373b2b1712aSChristoph Hellwig if (!xfs_iext_get_extent(ifp, &icur, &got) || 5374b2b1712aSChristoph Hellwig (got.br_startoff > end && 5375b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got))) { 5376b2b1712aSChristoph Hellwig done = true; 5377b2b1712aSChristoph Hellwig break; 537830f712c9SDave Chinner } 537930f712c9SDave Chinner extno++; 538030f712c9SDave Chinner } 538130f712c9SDave Chinner } 5382b2b1712aSChristoph Hellwig if (done || end == (xfs_fileoff_t)-1 || end < start) 53834453593bSDarrick J. Wong *rlen = 0; 53844453593bSDarrick J. Wong else 53858280f6edSChristoph Hellwig *rlen = end - start + 1; 538630f712c9SDave Chinner 538730f712c9SDave Chinner /* 538830f712c9SDave Chinner * Convert to a btree if necessary. 538930f712c9SDave Chinner */ 539030f712c9SDave Chinner if (xfs_bmap_needs_btree(ip, whichfork)) { 539130f712c9SDave Chinner ASSERT(cur == NULL); 53922c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, 539330f712c9SDave Chinner &cur, 0, &tmp_logflags, whichfork); 539430f712c9SDave Chinner logflags |= tmp_logflags; 539530f712c9SDave Chinner if (error) 539630f712c9SDave Chinner goto error0; 539730f712c9SDave Chinner } 539830f712c9SDave Chinner /* 539930f712c9SDave Chinner * transform from btree to extents, give it cur 540030f712c9SDave Chinner */ 540130f712c9SDave Chinner else if (xfs_bmap_wants_extents(ip, whichfork)) { 540230f712c9SDave Chinner ASSERT(cur != NULL); 540330f712c9SDave Chinner error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, 540430f712c9SDave Chinner whichfork); 540530f712c9SDave Chinner logflags |= tmp_logflags; 540630f712c9SDave Chinner if (error) 540730f712c9SDave Chinner goto error0; 540830f712c9SDave Chinner } 540930f712c9SDave Chinner /* 541030f712c9SDave Chinner * transform from extents to local? 541130f712c9SDave Chinner */ 541230f712c9SDave Chinner error = 0; 541330f712c9SDave Chinner error0: 541430f712c9SDave Chinner /* 541530f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 541630f712c9SDave Chinner * logging the extent records if we've converted to btree format. 541730f712c9SDave Chinner */ 541830f712c9SDave Chinner if ((logflags & xfs_ilog_fext(whichfork)) && 541930f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) 542030f712c9SDave Chinner logflags &= ~xfs_ilog_fext(whichfork); 542130f712c9SDave Chinner else if ((logflags & xfs_ilog_fbroot(whichfork)) && 542230f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) 542330f712c9SDave Chinner logflags &= ~xfs_ilog_fbroot(whichfork); 542430f712c9SDave Chinner /* 542530f712c9SDave Chinner * Log inode even in the error case, if the transaction 542630f712c9SDave Chinner * is dirty we'll need to shut down the filesystem. 542730f712c9SDave Chinner */ 542830f712c9SDave Chinner if (logflags) 542930f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 543030f712c9SDave Chinner if (cur) { 543130f712c9SDave Chinner if (!error) { 543230f712c9SDave Chinner *firstblock = cur->bc_private.b.firstblock; 543330f712c9SDave Chinner cur->bc_private.b.allocated = 0; 543430f712c9SDave Chinner } 543530f712c9SDave Chinner xfs_btree_del_cursor(cur, 543630f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 543730f712c9SDave Chinner } 543830f712c9SDave Chinner return error; 543930f712c9SDave Chinner } 544030f712c9SDave Chinner 54414453593bSDarrick J. Wong /* Unmap a range of a file. */ 54424453593bSDarrick J. Wong int 54434453593bSDarrick J. Wong xfs_bunmapi( 54444453593bSDarrick J. Wong xfs_trans_t *tp, 54454453593bSDarrick J. Wong struct xfs_inode *ip, 54464453593bSDarrick J. Wong xfs_fileoff_t bno, 54474453593bSDarrick J. Wong xfs_filblks_t len, 54484453593bSDarrick J. Wong int flags, 54494453593bSDarrick J. Wong xfs_extnum_t nexts, 54504453593bSDarrick J. Wong xfs_fsblock_t *firstblock, 54514453593bSDarrick J. Wong struct xfs_defer_ops *dfops, 54524453593bSDarrick J. Wong int *done) 54534453593bSDarrick J. Wong { 54544453593bSDarrick J. Wong int error; 54554453593bSDarrick J. Wong 54564453593bSDarrick J. Wong error = __xfs_bunmapi(tp, ip, bno, &len, flags, nexts, firstblock, 54574453593bSDarrick J. Wong dfops); 54584453593bSDarrick J. Wong *done = (len == 0); 54594453593bSDarrick J. Wong return error; 54604453593bSDarrick J. Wong } 54614453593bSDarrick J. Wong 546230f712c9SDave Chinner /* 5463ddb19e31SBrian Foster * Determine whether an extent shift can be accomplished by a merge with the 5464ddb19e31SBrian Foster * extent that precedes the target hole of the shift. 5465ddb19e31SBrian Foster */ 5466ddb19e31SBrian Foster STATIC bool 5467ddb19e31SBrian Foster xfs_bmse_can_merge( 5468ddb19e31SBrian Foster struct xfs_bmbt_irec *left, /* preceding extent */ 5469ddb19e31SBrian Foster struct xfs_bmbt_irec *got, /* current extent to shift */ 5470ddb19e31SBrian Foster xfs_fileoff_t shift) /* shift fsb */ 5471ddb19e31SBrian Foster { 5472ddb19e31SBrian Foster xfs_fileoff_t startoff; 5473ddb19e31SBrian Foster 5474ddb19e31SBrian Foster startoff = got->br_startoff - shift; 5475ddb19e31SBrian Foster 5476ddb19e31SBrian Foster /* 5477ddb19e31SBrian Foster * The extent, once shifted, must be adjacent in-file and on-disk with 5478ddb19e31SBrian Foster * the preceding extent. 5479ddb19e31SBrian Foster */ 5480ddb19e31SBrian Foster if ((left->br_startoff + left->br_blockcount != startoff) || 5481ddb19e31SBrian Foster (left->br_startblock + left->br_blockcount != got->br_startblock) || 5482ddb19e31SBrian Foster (left->br_state != got->br_state) || 5483ddb19e31SBrian Foster (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) 5484ddb19e31SBrian Foster return false; 5485ddb19e31SBrian Foster 5486ddb19e31SBrian Foster return true; 5487ddb19e31SBrian Foster } 5488ddb19e31SBrian Foster 5489ddb19e31SBrian Foster /* 5490ddb19e31SBrian Foster * A bmap extent shift adjusts the file offset of an extent to fill a preceding 5491ddb19e31SBrian Foster * hole in the file. If an extent shift would result in the extent being fully 5492ddb19e31SBrian Foster * adjacent to the extent that currently precedes the hole, we can merge with 5493ddb19e31SBrian Foster * the preceding extent rather than do the shift. 5494ddb19e31SBrian Foster * 5495ddb19e31SBrian Foster * This function assumes the caller has verified a shift-by-merge is possible 5496ddb19e31SBrian Foster * with the provided extents via xfs_bmse_can_merge(). 5497ddb19e31SBrian Foster */ 5498ddb19e31SBrian Foster STATIC int 5499ddb19e31SBrian Foster xfs_bmse_merge( 5500ddb19e31SBrian Foster struct xfs_inode *ip, 5501ddb19e31SBrian Foster int whichfork, 5502ddb19e31SBrian Foster xfs_fileoff_t shift, /* shift fsb */ 5503b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 55044da6b514SChristoph Hellwig struct xfs_bmbt_irec *got, /* extent to shift */ 55054da6b514SChristoph Hellwig struct xfs_bmbt_irec *left, /* preceding extent */ 5506ddb19e31SBrian Foster struct xfs_btree_cur *cur, 55074da6b514SChristoph Hellwig int *logflags, /* output */ 55084da6b514SChristoph Hellwig struct xfs_defer_ops *dfops) 5509ddb19e31SBrian Foster { 55104da6b514SChristoph Hellwig struct xfs_bmbt_irec new; 5511ddb19e31SBrian Foster xfs_filblks_t blockcount; 5512ddb19e31SBrian Foster int error, i; 55135fb5aeeeSEric Sandeen struct xfs_mount *mp = ip->i_mount; 5514ddb19e31SBrian Foster 55154da6b514SChristoph Hellwig blockcount = left->br_blockcount + got->br_blockcount; 5516ddb19e31SBrian Foster 5517ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 5518ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 55194da6b514SChristoph Hellwig ASSERT(xfs_bmse_can_merge(left, got, shift)); 5520ddb19e31SBrian Foster 55214da6b514SChristoph Hellwig new = *left; 55224da6b514SChristoph Hellwig new.br_blockcount = blockcount; 5523ddb19e31SBrian Foster 5524ddb19e31SBrian Foster /* 5525ddb19e31SBrian Foster * Update the on-disk extent count, the btree if necessary and log the 5526ddb19e31SBrian Foster * inode. 5527ddb19e31SBrian Foster */ 5528ddb19e31SBrian Foster XFS_IFORK_NEXT_SET(ip, whichfork, 5529ddb19e31SBrian Foster XFS_IFORK_NEXTENTS(ip, whichfork) - 1); 5530ddb19e31SBrian Foster *logflags |= XFS_ILOG_CORE; 5531ddb19e31SBrian Foster if (!cur) { 5532ddb19e31SBrian Foster *logflags |= XFS_ILOG_DEXT; 55334da6b514SChristoph Hellwig goto done; 5534ddb19e31SBrian Foster } 5535ddb19e31SBrian Foster 5536ddb19e31SBrian Foster /* lookup and remove the extent to merge */ 5537e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, got, &i); 5538ddb19e31SBrian Foster if (error) 55394db431f5SDave Chinner return error; 55405fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5541ddb19e31SBrian Foster 5542ddb19e31SBrian Foster error = xfs_btree_delete(cur, &i); 5543ddb19e31SBrian Foster if (error) 55444db431f5SDave Chinner return error; 55455fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5546ddb19e31SBrian Foster 5547ddb19e31SBrian Foster /* lookup and update size of the previous extent */ 5548e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, left, &i); 5549ddb19e31SBrian Foster if (error) 55504db431f5SDave Chinner return error; 55515fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5552ddb19e31SBrian Foster 5553a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &new); 55544da6b514SChristoph Hellwig if (error) 55554da6b514SChristoph Hellwig return error; 5556ddb19e31SBrian Foster 55574da6b514SChristoph Hellwig done: 5558c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, 0); 5559b2b1712aSChristoph Hellwig xfs_iext_prev(XFS_IFORK_PTR(ip, whichfork), icur); 5560b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, xfs_bmap_fork_to_state(whichfork), icur, 5561b2b1712aSChristoph Hellwig &new); 55624da6b514SChristoph Hellwig 55634cc1ee5eSDarrick J. Wong /* update reverse mapping. rmap functions merge the rmaps for us */ 55644da6b514SChristoph Hellwig error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, got); 55654da6b514SChristoph Hellwig if (error) 55664da6b514SChristoph Hellwig return error; 55674cc1ee5eSDarrick J. Wong memcpy(&new, got, sizeof(new)); 55684cc1ee5eSDarrick J. Wong new.br_startoff = left->br_startoff + left->br_blockcount; 55694da6b514SChristoph Hellwig return xfs_rmap_map_extent(mp, dfops, ip, whichfork, &new); 5570ddb19e31SBrian Foster } 5571ddb19e31SBrian Foster 5572bf806280SChristoph Hellwig static int 5573bf806280SChristoph Hellwig xfs_bmap_shift_update_extent( 5574a979bdfeSBrian Foster struct xfs_inode *ip, 5575a979bdfeSBrian Foster int whichfork, 5576b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 55774da6b514SChristoph Hellwig struct xfs_bmbt_irec *got, 5578a979bdfeSBrian Foster struct xfs_btree_cur *cur, 5579a904b1caSNamjae Jeon int *logflags, 5580bf806280SChristoph Hellwig struct xfs_defer_ops *dfops, 5581bf806280SChristoph Hellwig xfs_fileoff_t startoff) 5582a979bdfeSBrian Foster { 5583bf806280SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 558411f75b3bSChristoph Hellwig struct xfs_bmbt_irec prev = *got; 5585bf806280SChristoph Hellwig int error, i; 5586a979bdfeSBrian Foster 5587a979bdfeSBrian Foster *logflags |= XFS_ILOG_CORE; 5588a979bdfeSBrian Foster 558911f75b3bSChristoph Hellwig got->br_startoff = startoff; 55904da6b514SChristoph Hellwig 55914da6b514SChristoph Hellwig if (cur) { 559211f75b3bSChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &prev, &i); 5593a979bdfeSBrian Foster if (error) 5594a979bdfeSBrian Foster return error; 55955fb5aeeeSEric Sandeen XFS_WANT_CORRUPTED_RETURN(mp, i == 1); 5596a979bdfeSBrian Foster 559711f75b3bSChristoph Hellwig error = xfs_bmbt_update(cur, got); 55989c194644SDarrick J. Wong if (error) 55999c194644SDarrick J. Wong return error; 56004da6b514SChristoph Hellwig } else { 56014da6b514SChristoph Hellwig *logflags |= XFS_ILOG_DEXT; 56024da6b514SChristoph Hellwig } 56039c194644SDarrick J. Wong 5604b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, xfs_bmap_fork_to_state(whichfork), icur, 5605b2b1712aSChristoph Hellwig got); 56064da6b514SChristoph Hellwig 56079c194644SDarrick J. Wong /* update reverse mapping */ 560811f75b3bSChristoph Hellwig error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, &prev); 56099c194644SDarrick J. Wong if (error) 56109c194644SDarrick J. Wong return error; 561111f75b3bSChristoph Hellwig return xfs_rmap_map_extent(mp, dfops, ip, whichfork, got); 5612a979bdfeSBrian Foster } 5613a979bdfeSBrian Foster 561430f712c9SDave Chinner int 5615ecfea3f0SChristoph Hellwig xfs_bmap_collapse_extents( 561630f712c9SDave Chinner struct xfs_trans *tp, 561730f712c9SDave Chinner struct xfs_inode *ip, 5618a904b1caSNamjae Jeon xfs_fileoff_t *next_fsb, 561930f712c9SDave Chinner xfs_fileoff_t offset_shift_fsb, 5620ecfea3f0SChristoph Hellwig bool *done, 5621a904b1caSNamjae Jeon xfs_fileoff_t stop_fsb, 562230f712c9SDave Chinner xfs_fsblock_t *firstblock, 5623ecfea3f0SChristoph Hellwig struct xfs_defer_ops *dfops) 562430f712c9SDave Chinner { 5625ecfea3f0SChristoph Hellwig int whichfork = XFS_DATA_FORK; 5626ecfea3f0SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 5627ecfea3f0SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 5628ca446d88SBrian Foster struct xfs_btree_cur *cur = NULL; 5629bf806280SChristoph Hellwig struct xfs_bmbt_irec got, prev; 5630b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 5631bf806280SChristoph Hellwig xfs_fileoff_t new_startoff; 563230f712c9SDave Chinner int error = 0; 5633ca446d88SBrian Foster int logflags = 0; 563430f712c9SDave Chinner 563530f712c9SDave Chinner if (unlikely(XFS_TEST_ERROR( 563630f712c9SDave Chinner (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 563730f712c9SDave Chinner XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 56389e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 5639ecfea3f0SChristoph Hellwig XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp); 56402451337dSDave Chinner return -EFSCORRUPTED; 564130f712c9SDave Chinner } 564230f712c9SDave Chinner 564330f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 56442451337dSDave Chinner return -EIO; 564530f712c9SDave Chinner 5646ecfea3f0SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL)); 564730f712c9SDave Chinner 564830f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 564930f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 565030f712c9SDave Chinner if (error) 565130f712c9SDave Chinner return error; 565230f712c9SDave Chinner } 565330f712c9SDave Chinner 5654ddb19e31SBrian Foster if (ifp->if_flags & XFS_IFBROOT) { 5655ddb19e31SBrian Foster cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 5656ddb19e31SBrian Foster cur->bc_private.b.firstblock = *firstblock; 56572c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 5658ddb19e31SBrian Foster cur->bc_private.b.flags = 0; 5659ddb19e31SBrian Foster } 5660ddb19e31SBrian Foster 5661b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, *next_fsb, &icur, &got)) { 5662ecfea3f0SChristoph Hellwig *done = true; 5663ecfea3f0SChristoph Hellwig goto del_cursor; 5664ecfea3f0SChristoph Hellwig } 5665bf806280SChristoph Hellwig XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got.br_startblock)); 5666ecfea3f0SChristoph Hellwig 5667bf806280SChristoph Hellwig new_startoff = got.br_startoff - offset_shift_fsb; 5668b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, &icur, &prev)) { 5669bf806280SChristoph Hellwig if (new_startoff < prev.br_startoff + prev.br_blockcount) { 5670bf806280SChristoph Hellwig error = -EINVAL; 5671bf806280SChristoph Hellwig goto del_cursor; 5672bf806280SChristoph Hellwig } 5673bf806280SChristoph Hellwig 5674bf806280SChristoph Hellwig if (xfs_bmse_can_merge(&prev, &got, offset_shift_fsb)) { 5675bf806280SChristoph Hellwig error = xfs_bmse_merge(ip, whichfork, offset_shift_fsb, 5676b2b1712aSChristoph Hellwig &icur, &got, &prev, cur, &logflags, 5677b2b1712aSChristoph Hellwig dfops); 5678ecfea3f0SChristoph Hellwig if (error) 5679ecfea3f0SChristoph Hellwig goto del_cursor; 5680bf806280SChristoph Hellwig goto done; 5681bf806280SChristoph Hellwig } 5682bf806280SChristoph Hellwig } else { 5683bf806280SChristoph Hellwig if (got.br_startoff < offset_shift_fsb) { 5684bf806280SChristoph Hellwig error = -EINVAL; 5685bf806280SChristoph Hellwig goto del_cursor; 5686bf806280SChristoph Hellwig } 5687bf806280SChristoph Hellwig } 5688bf806280SChristoph Hellwig 5689b2b1712aSChristoph Hellwig error = xfs_bmap_shift_update_extent(ip, whichfork, &icur, &got, cur, 5690b2b1712aSChristoph Hellwig &logflags, dfops, new_startoff); 5691bf806280SChristoph Hellwig if (error) 5692bf806280SChristoph Hellwig goto del_cursor; 569340591bdbSChristoph Hellwig 569442630361SChristoph Hellwig done: 5695b2b1712aSChristoph Hellwig if (!xfs_iext_next_extent(ifp, &icur, &got)) { 5696ecfea3f0SChristoph Hellwig *done = true; 5697ecfea3f0SChristoph Hellwig goto del_cursor; 5698ecfea3f0SChristoph Hellwig } 5699ecfea3f0SChristoph Hellwig 5700ecfea3f0SChristoph Hellwig *next_fsb = got.br_startoff; 5701ecfea3f0SChristoph Hellwig del_cursor: 5702ecfea3f0SChristoph Hellwig if (cur) 5703ecfea3f0SChristoph Hellwig xfs_btree_del_cursor(cur, 5704ecfea3f0SChristoph Hellwig error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 5705ecfea3f0SChristoph Hellwig if (logflags) 5706ecfea3f0SChristoph Hellwig xfs_trans_log_inode(tp, ip, logflags); 5707ecfea3f0SChristoph Hellwig return error; 5708ecfea3f0SChristoph Hellwig } 5709ecfea3f0SChristoph Hellwig 5710ecfea3f0SChristoph Hellwig int 5711ecfea3f0SChristoph Hellwig xfs_bmap_insert_extents( 5712ecfea3f0SChristoph Hellwig struct xfs_trans *tp, 5713ecfea3f0SChristoph Hellwig struct xfs_inode *ip, 5714ecfea3f0SChristoph Hellwig xfs_fileoff_t *next_fsb, 5715ecfea3f0SChristoph Hellwig xfs_fileoff_t offset_shift_fsb, 5716ecfea3f0SChristoph Hellwig bool *done, 5717ecfea3f0SChristoph Hellwig xfs_fileoff_t stop_fsb, 5718ecfea3f0SChristoph Hellwig xfs_fsblock_t *firstblock, 5719ecfea3f0SChristoph Hellwig struct xfs_defer_ops *dfops) 5720ecfea3f0SChristoph Hellwig { 5721ecfea3f0SChristoph Hellwig int whichfork = XFS_DATA_FORK; 5722ecfea3f0SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 5723ecfea3f0SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 5724ecfea3f0SChristoph Hellwig struct xfs_btree_cur *cur = NULL; 57255936dc54SChristoph Hellwig struct xfs_bmbt_irec got, next; 5726b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 5727bf806280SChristoph Hellwig xfs_fileoff_t new_startoff; 5728ecfea3f0SChristoph Hellwig int error = 0; 5729ecfea3f0SChristoph Hellwig int logflags = 0; 5730ecfea3f0SChristoph Hellwig 5731ecfea3f0SChristoph Hellwig if (unlikely(XFS_TEST_ERROR( 5732ecfea3f0SChristoph Hellwig (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 5733ecfea3f0SChristoph Hellwig XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 5734ecfea3f0SChristoph Hellwig mp, XFS_ERRTAG_BMAPIFORMAT))) { 5735ecfea3f0SChristoph Hellwig XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp); 5736ecfea3f0SChristoph Hellwig return -EFSCORRUPTED; 5737ecfea3f0SChristoph Hellwig } 5738ecfea3f0SChristoph Hellwig 5739ecfea3f0SChristoph Hellwig if (XFS_FORCED_SHUTDOWN(mp)) 5740ecfea3f0SChristoph Hellwig return -EIO; 5741ecfea3f0SChristoph Hellwig 5742ecfea3f0SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL)); 5743ecfea3f0SChristoph Hellwig 5744ecfea3f0SChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 5745ecfea3f0SChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 5746ecfea3f0SChristoph Hellwig if (error) 5747ecfea3f0SChristoph Hellwig return error; 5748ecfea3f0SChristoph Hellwig } 5749ecfea3f0SChristoph Hellwig 5750ecfea3f0SChristoph Hellwig if (ifp->if_flags & XFS_IFBROOT) { 5751ecfea3f0SChristoph Hellwig cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 5752ecfea3f0SChristoph Hellwig cur->bc_private.b.firstblock = *firstblock; 5753ecfea3f0SChristoph Hellwig cur->bc_private.b.dfops = dfops; 5754ecfea3f0SChristoph Hellwig cur->bc_private.b.flags = 0; 5755ecfea3f0SChristoph Hellwig } 5756ecfea3f0SChristoph Hellwig 5757a904b1caSNamjae Jeon if (*next_fsb == NULLFSBLOCK) { 5758b2b1712aSChristoph Hellwig xfs_iext_last(ifp, &icur); 5759b2b1712aSChristoph Hellwig if (!xfs_iext_get_extent(ifp, &icur, &got) || 57605936dc54SChristoph Hellwig stop_fsb > got.br_startoff) { 5761ecfea3f0SChristoph Hellwig *done = true; 5762a904b1caSNamjae Jeon goto del_cursor; 5763a904b1caSNamjae Jeon } 576405b7c8abSChristoph Hellwig } else { 5765b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, *next_fsb, &icur, &got)) { 5766ecfea3f0SChristoph Hellwig *done = true; 5767a904b1caSNamjae Jeon goto del_cursor; 5768a904b1caSNamjae Jeon } 576905b7c8abSChristoph Hellwig } 5770bf806280SChristoph Hellwig XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got.br_startblock)); 5771a904b1caSNamjae Jeon 57725936dc54SChristoph Hellwig if (stop_fsb >= got.br_startoff + got.br_blockcount) { 5773a904b1caSNamjae Jeon error = -EIO; 5774a904b1caSNamjae Jeon goto del_cursor; 5775a904b1caSNamjae Jeon } 5776a904b1caSNamjae Jeon 5777bf806280SChristoph Hellwig new_startoff = got.br_startoff + offset_shift_fsb; 5778b2b1712aSChristoph Hellwig if (xfs_iext_peek_next_extent(ifp, &icur, &next)) { 5779bf806280SChristoph Hellwig if (new_startoff + got.br_blockcount > next.br_startoff) { 5780bf806280SChristoph Hellwig error = -EINVAL; 5781bf806280SChristoph Hellwig goto del_cursor; 5782bf806280SChristoph Hellwig } 5783bf806280SChristoph Hellwig 5784bf806280SChristoph Hellwig /* 5785bf806280SChristoph Hellwig * Unlike a left shift (which involves a hole punch), a right 5786bf806280SChristoph Hellwig * shift does not modify extent neighbors in any way. We should 5787bf806280SChristoph Hellwig * never find mergeable extents in this scenario. Check anyways 5788bf806280SChristoph Hellwig * and warn if we encounter two extents that could be one. 5789bf806280SChristoph Hellwig */ 5790bf806280SChristoph Hellwig if (xfs_bmse_can_merge(&got, &next, offset_shift_fsb)) 5791bf806280SChristoph Hellwig WARN_ON_ONCE(1); 5792bf806280SChristoph Hellwig } 5793bf806280SChristoph Hellwig 5794b2b1712aSChristoph Hellwig error = xfs_bmap_shift_update_extent(ip, whichfork, &icur, &got, cur, 5795b2b1712aSChristoph Hellwig &logflags, dfops, new_startoff); 5796ddb19e31SBrian Foster if (error) 5797ddb19e31SBrian Foster goto del_cursor; 57985936dc54SChristoph Hellwig 5799b2b1712aSChristoph Hellwig if (!xfs_iext_prev_extent(ifp, &icur, &got) || 58005936dc54SChristoph Hellwig stop_fsb >= got.br_startoff + got.br_blockcount) { 5801ecfea3f0SChristoph Hellwig *done = true; 58026b18af0dSChristoph Hellwig goto del_cursor; 5803a904b1caSNamjae Jeon } 580430f712c9SDave Chinner 58052c845f5aSBrian Foster *next_fsb = got.br_startoff; 580630f712c9SDave Chinner del_cursor: 580730f712c9SDave Chinner if (cur) 580830f712c9SDave Chinner xfs_btree_del_cursor(cur, 580930f712c9SDave Chinner error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 5810ca446d88SBrian Foster if (logflags) 581130f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 581230f712c9SDave Chinner return error; 581330f712c9SDave Chinner } 5814a904b1caSNamjae Jeon 5815a904b1caSNamjae Jeon /* 5816b2b1712aSChristoph Hellwig * Splits an extent into two extents at split_fsb block such that it is the 5817b2b1712aSChristoph Hellwig * first block of the current_ext. @ext is a target extent to be split. 5818b2b1712aSChristoph Hellwig * @split_fsb is a block where the extents is split. If split_fsb lies in a 5819b2b1712aSChristoph Hellwig * hole or the first block of extents, just return 0. 5820a904b1caSNamjae Jeon */ 5821a904b1caSNamjae Jeon STATIC int 5822a904b1caSNamjae Jeon xfs_bmap_split_extent_at( 5823a904b1caSNamjae Jeon struct xfs_trans *tp, 5824a904b1caSNamjae Jeon struct xfs_inode *ip, 5825a904b1caSNamjae Jeon xfs_fileoff_t split_fsb, 5826a904b1caSNamjae Jeon xfs_fsblock_t *firstfsb, 58272c3234d1SDarrick J. Wong struct xfs_defer_ops *dfops) 5828a904b1caSNamjae Jeon { 5829a904b1caSNamjae Jeon int whichfork = XFS_DATA_FORK; 5830a904b1caSNamjae Jeon struct xfs_btree_cur *cur = NULL; 5831a904b1caSNamjae Jeon struct xfs_bmbt_irec got; 5832a904b1caSNamjae Jeon struct xfs_bmbt_irec new; /* split extent */ 5833a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 5834a904b1caSNamjae Jeon struct xfs_ifork *ifp; 5835a904b1caSNamjae Jeon xfs_fsblock_t gotblkcnt; /* new block count for got */ 5836b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 5837a904b1caSNamjae Jeon int error = 0; 5838a904b1caSNamjae Jeon int logflags = 0; 5839a904b1caSNamjae Jeon int i = 0; 5840a904b1caSNamjae Jeon 5841a904b1caSNamjae Jeon if (unlikely(XFS_TEST_ERROR( 5842a904b1caSNamjae Jeon (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && 5843a904b1caSNamjae Jeon XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), 58449e24cfd0SDarrick J. Wong mp, XFS_ERRTAG_BMAPIFORMAT))) { 5845a904b1caSNamjae Jeon XFS_ERROR_REPORT("xfs_bmap_split_extent_at", 5846a904b1caSNamjae Jeon XFS_ERRLEVEL_LOW, mp); 5847a904b1caSNamjae Jeon return -EFSCORRUPTED; 5848a904b1caSNamjae Jeon } 5849a904b1caSNamjae Jeon 5850a904b1caSNamjae Jeon if (XFS_FORCED_SHUTDOWN(mp)) 5851a904b1caSNamjae Jeon return -EIO; 5852a904b1caSNamjae Jeon 5853a904b1caSNamjae Jeon ifp = XFS_IFORK_PTR(ip, whichfork); 5854a904b1caSNamjae Jeon if (!(ifp->if_flags & XFS_IFEXTENTS)) { 5855a904b1caSNamjae Jeon /* Read in all the extents */ 5856a904b1caSNamjae Jeon error = xfs_iread_extents(tp, ip, whichfork); 5857a904b1caSNamjae Jeon if (error) 5858a904b1caSNamjae Jeon return error; 5859a904b1caSNamjae Jeon } 5860a904b1caSNamjae Jeon 5861a904b1caSNamjae Jeon /* 58624c35445bSChristoph Hellwig * If there are not extents, or split_fsb lies in a hole we are done. 5863a904b1caSNamjae Jeon */ 5864b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, split_fsb, &icur, &got) || 58654c35445bSChristoph Hellwig got.br_startoff >= split_fsb) 5866a904b1caSNamjae Jeon return 0; 5867a904b1caSNamjae Jeon 5868a904b1caSNamjae Jeon gotblkcnt = split_fsb - got.br_startoff; 5869a904b1caSNamjae Jeon new.br_startoff = split_fsb; 5870a904b1caSNamjae Jeon new.br_startblock = got.br_startblock + gotblkcnt; 5871a904b1caSNamjae Jeon new.br_blockcount = got.br_blockcount - gotblkcnt; 5872a904b1caSNamjae Jeon new.br_state = got.br_state; 5873a904b1caSNamjae Jeon 5874a904b1caSNamjae Jeon if (ifp->if_flags & XFS_IFBROOT) { 5875a904b1caSNamjae Jeon cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 5876a904b1caSNamjae Jeon cur->bc_private.b.firstblock = *firstfsb; 58772c3234d1SDarrick J. Wong cur->bc_private.b.dfops = dfops; 5878a904b1caSNamjae Jeon cur->bc_private.b.flags = 0; 5879e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &got, &i); 5880a904b1caSNamjae Jeon if (error) 5881a904b1caSNamjae Jeon goto del_cursor; 5882a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); 5883a904b1caSNamjae Jeon } 5884a904b1caSNamjae Jeon 5885a904b1caSNamjae Jeon got.br_blockcount = gotblkcnt; 5886b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, xfs_bmap_fork_to_state(whichfork), &icur, 5887b2b1712aSChristoph Hellwig &got); 5888a904b1caSNamjae Jeon 5889a904b1caSNamjae Jeon logflags = XFS_ILOG_CORE; 5890a904b1caSNamjae Jeon if (cur) { 5891a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 5892a904b1caSNamjae Jeon if (error) 5893a904b1caSNamjae Jeon goto del_cursor; 5894a904b1caSNamjae Jeon } else 5895a904b1caSNamjae Jeon logflags |= XFS_ILOG_DEXT; 5896a904b1caSNamjae Jeon 5897a904b1caSNamjae Jeon /* Add new extent */ 5898b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &icur); 58990254c2f2SChristoph Hellwig xfs_iext_insert(ip, &icur, &new, 0); 5900a904b1caSNamjae Jeon XFS_IFORK_NEXT_SET(ip, whichfork, 5901a904b1caSNamjae Jeon XFS_IFORK_NEXTENTS(ip, whichfork) + 1); 5902a904b1caSNamjae Jeon 5903a904b1caSNamjae Jeon if (cur) { 5904e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &new, &i); 5905a904b1caSNamjae Jeon if (error) 5906a904b1caSNamjae Jeon goto del_cursor; 5907a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 0, del_cursor); 5908a904b1caSNamjae Jeon error = xfs_btree_insert(cur, &i); 5909a904b1caSNamjae Jeon if (error) 5910a904b1caSNamjae Jeon goto del_cursor; 5911a904b1caSNamjae Jeon XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); 5912a904b1caSNamjae Jeon } 5913a904b1caSNamjae Jeon 5914a904b1caSNamjae Jeon /* 5915a904b1caSNamjae Jeon * Convert to a btree if necessary. 5916a904b1caSNamjae Jeon */ 5917a904b1caSNamjae Jeon if (xfs_bmap_needs_btree(ip, whichfork)) { 5918a904b1caSNamjae Jeon int tmp_logflags; /* partial log flag return val */ 5919a904b1caSNamjae Jeon 5920a904b1caSNamjae Jeon ASSERT(cur == NULL); 59212c3234d1SDarrick J. Wong error = xfs_bmap_extents_to_btree(tp, ip, firstfsb, dfops, 5922a904b1caSNamjae Jeon &cur, 0, &tmp_logflags, whichfork); 5923a904b1caSNamjae Jeon logflags |= tmp_logflags; 5924a904b1caSNamjae Jeon } 5925a904b1caSNamjae Jeon 5926a904b1caSNamjae Jeon del_cursor: 5927a904b1caSNamjae Jeon if (cur) { 5928a904b1caSNamjae Jeon cur->bc_private.b.allocated = 0; 5929a904b1caSNamjae Jeon xfs_btree_del_cursor(cur, 5930a904b1caSNamjae Jeon error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); 5931a904b1caSNamjae Jeon } 5932a904b1caSNamjae Jeon 5933a904b1caSNamjae Jeon if (logflags) 5934a904b1caSNamjae Jeon xfs_trans_log_inode(tp, ip, logflags); 5935a904b1caSNamjae Jeon return error; 5936a904b1caSNamjae Jeon } 5937a904b1caSNamjae Jeon 5938a904b1caSNamjae Jeon int 5939a904b1caSNamjae Jeon xfs_bmap_split_extent( 5940a904b1caSNamjae Jeon struct xfs_inode *ip, 5941a904b1caSNamjae Jeon xfs_fileoff_t split_fsb) 5942a904b1caSNamjae Jeon { 5943a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 5944a904b1caSNamjae Jeon struct xfs_trans *tp; 59452c3234d1SDarrick J. Wong struct xfs_defer_ops dfops; 5946a904b1caSNamjae Jeon xfs_fsblock_t firstfsb; 5947a904b1caSNamjae Jeon int error; 5948a904b1caSNamjae Jeon 5949253f4911SChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 5950253f4911SChristoph Hellwig XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp); 5951253f4911SChristoph Hellwig if (error) 5952a904b1caSNamjae Jeon return error; 5953a904b1caSNamjae Jeon 5954a904b1caSNamjae Jeon xfs_ilock(ip, XFS_ILOCK_EXCL); 5955a904b1caSNamjae Jeon xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); 5956a904b1caSNamjae Jeon 59572c3234d1SDarrick J. Wong xfs_defer_init(&dfops, &firstfsb); 5958a904b1caSNamjae Jeon 5959a904b1caSNamjae Jeon error = xfs_bmap_split_extent_at(tp, ip, split_fsb, 59602c3234d1SDarrick J. Wong &firstfsb, &dfops); 5961a904b1caSNamjae Jeon if (error) 5962a904b1caSNamjae Jeon goto out; 5963a904b1caSNamjae Jeon 59648ad7c629SChristoph Hellwig error = xfs_defer_finish(&tp, &dfops); 5965a904b1caSNamjae Jeon if (error) 5966a904b1caSNamjae Jeon goto out; 5967a904b1caSNamjae Jeon 596870393313SChristoph Hellwig return xfs_trans_commit(tp); 5969a904b1caSNamjae Jeon 5970a904b1caSNamjae Jeon out: 59712c3234d1SDarrick J. Wong xfs_defer_cancel(&dfops); 59724906e215SChristoph Hellwig xfs_trans_cancel(tp); 5973a904b1caSNamjae Jeon return error; 5974a904b1caSNamjae Jeon } 59759f3afb57SDarrick J. Wong 59769f3afb57SDarrick J. Wong /* Deferred mapping is only for real extents in the data fork. */ 59779f3afb57SDarrick J. Wong static bool 59789f3afb57SDarrick J. Wong xfs_bmap_is_update_needed( 59799f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 59809f3afb57SDarrick J. Wong { 59819f3afb57SDarrick J. Wong return bmap->br_startblock != HOLESTARTBLOCK && 59829f3afb57SDarrick J. Wong bmap->br_startblock != DELAYSTARTBLOCK; 59839f3afb57SDarrick J. Wong } 59849f3afb57SDarrick J. Wong 59859f3afb57SDarrick J. Wong /* Record a bmap intent. */ 59869f3afb57SDarrick J. Wong static int 59879f3afb57SDarrick J. Wong __xfs_bmap_add( 59889f3afb57SDarrick J. Wong struct xfs_mount *mp, 59899f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 59909f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 59919f3afb57SDarrick J. Wong struct xfs_inode *ip, 59929f3afb57SDarrick J. Wong int whichfork, 59939f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 59949f3afb57SDarrick J. Wong { 59959f3afb57SDarrick J. Wong int error; 59969f3afb57SDarrick J. Wong struct xfs_bmap_intent *bi; 59979f3afb57SDarrick J. Wong 59989f3afb57SDarrick J. Wong trace_xfs_bmap_defer(mp, 59999f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(mp, bmap->br_startblock), 60009f3afb57SDarrick J. Wong type, 60019f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(mp, bmap->br_startblock), 60029f3afb57SDarrick J. Wong ip->i_ino, whichfork, 60039f3afb57SDarrick J. Wong bmap->br_startoff, 60049f3afb57SDarrick J. Wong bmap->br_blockcount, 60059f3afb57SDarrick J. Wong bmap->br_state); 60069f3afb57SDarrick J. Wong 60079f3afb57SDarrick J. Wong bi = kmem_alloc(sizeof(struct xfs_bmap_intent), KM_SLEEP | KM_NOFS); 60089f3afb57SDarrick J. Wong INIT_LIST_HEAD(&bi->bi_list); 60099f3afb57SDarrick J. Wong bi->bi_type = type; 60109f3afb57SDarrick J. Wong bi->bi_owner = ip; 60119f3afb57SDarrick J. Wong bi->bi_whichfork = whichfork; 60129f3afb57SDarrick J. Wong bi->bi_bmap = *bmap; 60139f3afb57SDarrick J. Wong 6014882d8785SChristoph Hellwig error = xfs_defer_ijoin(dfops, bi->bi_owner); 60159f3afb57SDarrick J. Wong if (error) { 60169f3afb57SDarrick J. Wong kmem_free(bi); 60179f3afb57SDarrick J. Wong return error; 60189f3afb57SDarrick J. Wong } 60199f3afb57SDarrick J. Wong 60209f3afb57SDarrick J. Wong xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_BMAP, &bi->bi_list); 60219f3afb57SDarrick J. Wong return 0; 60229f3afb57SDarrick J. Wong } 60239f3afb57SDarrick J. Wong 60249f3afb57SDarrick J. Wong /* Map an extent into a file. */ 60259f3afb57SDarrick J. Wong int 60269f3afb57SDarrick J. Wong xfs_bmap_map_extent( 60279f3afb57SDarrick J. Wong struct xfs_mount *mp, 60289f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 60299f3afb57SDarrick J. Wong struct xfs_inode *ip, 60309f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 60319f3afb57SDarrick J. Wong { 60329f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 60339f3afb57SDarrick J. Wong return 0; 60349f3afb57SDarrick J. Wong 60359f3afb57SDarrick J. Wong return __xfs_bmap_add(mp, dfops, XFS_BMAP_MAP, ip, 60369f3afb57SDarrick J. Wong XFS_DATA_FORK, PREV); 60379f3afb57SDarrick J. Wong } 60389f3afb57SDarrick J. Wong 60399f3afb57SDarrick J. Wong /* Unmap an extent out of a file. */ 60409f3afb57SDarrick J. Wong int 60419f3afb57SDarrick J. Wong xfs_bmap_unmap_extent( 60429f3afb57SDarrick J. Wong struct xfs_mount *mp, 60439f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 60449f3afb57SDarrick J. Wong struct xfs_inode *ip, 60459f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 60469f3afb57SDarrick J. Wong { 60479f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 60489f3afb57SDarrick J. Wong return 0; 60499f3afb57SDarrick J. Wong 60509f3afb57SDarrick J. Wong return __xfs_bmap_add(mp, dfops, XFS_BMAP_UNMAP, ip, 60519f3afb57SDarrick J. Wong XFS_DATA_FORK, PREV); 60529f3afb57SDarrick J. Wong } 60539f3afb57SDarrick J. Wong 60549f3afb57SDarrick J. Wong /* 60559f3afb57SDarrick J. Wong * Process one of the deferred bmap operations. We pass back the 60569f3afb57SDarrick J. Wong * btree cursor to maintain our lock on the bmapbt between calls. 60579f3afb57SDarrick J. Wong */ 60589f3afb57SDarrick J. Wong int 60599f3afb57SDarrick J. Wong xfs_bmap_finish_one( 60609f3afb57SDarrick J. Wong struct xfs_trans *tp, 60619f3afb57SDarrick J. Wong struct xfs_defer_ops *dfops, 60629f3afb57SDarrick J. Wong struct xfs_inode *ip, 60639f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 60649f3afb57SDarrick J. Wong int whichfork, 60659f3afb57SDarrick J. Wong xfs_fileoff_t startoff, 60669f3afb57SDarrick J. Wong xfs_fsblock_t startblock, 6067e1a4e37cSDarrick J. Wong xfs_filblks_t *blockcount, 60689f3afb57SDarrick J. Wong xfs_exntst_t state) 60699f3afb57SDarrick J. Wong { 6070e1a4e37cSDarrick J. Wong xfs_fsblock_t firstfsb; 6071e1a4e37cSDarrick J. Wong int error = 0; 60729f3afb57SDarrick J. Wong 60734c1a67bdSDarrick J. Wong /* 60744c1a67bdSDarrick J. Wong * firstfsb is tied to the transaction lifetime and is used to 60754c1a67bdSDarrick J. Wong * ensure correct AG locking order and schedule work item 60764c1a67bdSDarrick J. Wong * continuations. XFS_BUI_MAX_FAST_EXTENTS (== 1) restricts us 60774c1a67bdSDarrick J. Wong * to only making one bmap call per transaction, so it should 60784c1a67bdSDarrick J. Wong * be safe to have it as a local variable here. 60794c1a67bdSDarrick J. Wong */ 60804c1a67bdSDarrick J. Wong firstfsb = NULLFSBLOCK; 60814c1a67bdSDarrick J. Wong 60829f3afb57SDarrick J. Wong trace_xfs_bmap_deferred(tp->t_mountp, 60839f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type, 60849f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(tp->t_mountp, startblock), 6085e1a4e37cSDarrick J. Wong ip->i_ino, whichfork, startoff, *blockcount, state); 60869f3afb57SDarrick J. Wong 608739e07daaSChristoph Hellwig if (WARN_ON_ONCE(whichfork != XFS_DATA_FORK)) 60889f3afb57SDarrick J. Wong return -EFSCORRUPTED; 60899f3afb57SDarrick J. Wong 60909f3afb57SDarrick J. Wong if (XFS_TEST_ERROR(false, tp->t_mountp, 60919e24cfd0SDarrick J. Wong XFS_ERRTAG_BMAP_FINISH_ONE)) 60929f3afb57SDarrick J. Wong return -EIO; 60939f3afb57SDarrick J. Wong 60949f3afb57SDarrick J. Wong switch (type) { 60959f3afb57SDarrick J. Wong case XFS_BMAP_MAP: 6096e1a4e37cSDarrick J. Wong error = xfs_bmapi_remap(tp, ip, startoff, *blockcount, 60976ebd5a44SChristoph Hellwig startblock, dfops); 6098e1a4e37cSDarrick J. Wong *blockcount = 0; 60999f3afb57SDarrick J. Wong break; 61009f3afb57SDarrick J. Wong case XFS_BMAP_UNMAP: 6101e1a4e37cSDarrick J. Wong error = __xfs_bunmapi(tp, ip, startoff, blockcount, 6102e1a4e37cSDarrick J. Wong XFS_BMAPI_REMAP, 1, &firstfsb, dfops); 61039f3afb57SDarrick J. Wong break; 61049f3afb57SDarrick J. Wong default: 61059f3afb57SDarrick J. Wong ASSERT(0); 61069f3afb57SDarrick J. Wong error = -EFSCORRUPTED; 61079f3afb57SDarrick J. Wong } 61089f3afb57SDarrick J. Wong 61099f3afb57SDarrick J. Wong return error; 61109f3afb57SDarrick J. Wong } 6111