10b61f8a4SDave Chinner // SPDX-License-Identifier: GPL-2.0 230f712c9SDave Chinner /* 330f712c9SDave Chinner * Copyright (c) 2000-2006 Silicon Graphics, Inc. 430f712c9SDave Chinner * All Rights Reserved. 530f712c9SDave Chinner */ 630f712c9SDave Chinner #include "xfs.h" 730f712c9SDave Chinner #include "xfs_fs.h" 830f712c9SDave Chinner #include "xfs_shared.h" 930f712c9SDave Chinner #include "xfs_format.h" 1030f712c9SDave Chinner #include "xfs_log_format.h" 1130f712c9SDave Chinner #include "xfs_trans_resv.h" 1230f712c9SDave Chinner #include "xfs_bit.h" 1330f712c9SDave Chinner #include "xfs_sb.h" 1430f712c9SDave Chinner #include "xfs_mount.h" 153ab78df2SDarrick J. Wong #include "xfs_defer.h" 1630f712c9SDave Chinner #include "xfs_dir2.h" 1730f712c9SDave Chinner #include "xfs_inode.h" 1830f712c9SDave Chinner #include "xfs_btree.h" 1930f712c9SDave Chinner #include "xfs_trans.h" 2030f712c9SDave Chinner #include "xfs_alloc.h" 2130f712c9SDave Chinner #include "xfs_bmap.h" 2230f712c9SDave Chinner #include "xfs_bmap_util.h" 2330f712c9SDave Chinner #include "xfs_bmap_btree.h" 2430f712c9SDave Chinner #include "xfs_rtalloc.h" 25e9e899a2SDarrick J. Wong #include "xfs_errortag.h" 2630f712c9SDave Chinner #include "xfs_error.h" 2730f712c9SDave Chinner #include "xfs_quota.h" 2830f712c9SDave Chinner #include "xfs_trans_space.h" 2930f712c9SDave Chinner #include "xfs_buf_item.h" 3030f712c9SDave Chinner #include "xfs_trace.h" 3130f712c9SDave Chinner #include "xfs_attr_leaf.h" 3230f712c9SDave Chinner #include "xfs_filestream.h" 33340785ccSDarrick J. Wong #include "xfs_rmap.h" 343fd129b6SDarrick J. Wong #include "xfs_ag_resv.h" 3562aab20fSDarrick J. Wong #include "xfs_refcount.h" 36974ae922SBrian Foster #include "xfs_icache.h" 374e087a3bSChristoph Hellwig #include "xfs_iomap.h" 3830f712c9SDave Chinner 3930f712c9SDave Chinner 4030f712c9SDave Chinner kmem_zone_t *xfs_bmap_free_item_zone; 4130f712c9SDave Chinner 4230f712c9SDave Chinner /* 4330f712c9SDave Chinner * Miscellaneous helper functions 4430f712c9SDave Chinner */ 4530f712c9SDave Chinner 4630f712c9SDave Chinner /* 4730f712c9SDave Chinner * Compute and fill in the value of the maximum depth of a bmap btree 4830f712c9SDave Chinner * in this filesystem. Done once, during mount. 4930f712c9SDave Chinner */ 5030f712c9SDave Chinner void 5130f712c9SDave Chinner xfs_bmap_compute_maxlevels( 5230f712c9SDave Chinner xfs_mount_t *mp, /* file system mount structure */ 5330f712c9SDave Chinner int whichfork) /* data or attr fork */ 5430f712c9SDave Chinner { 5530f712c9SDave Chinner int level; /* btree level */ 5630f712c9SDave Chinner uint maxblocks; /* max blocks at this level */ 5730f712c9SDave Chinner uint maxleafents; /* max leaf entries possible */ 5830f712c9SDave Chinner int maxrootrecs; /* max records in root block */ 5930f712c9SDave Chinner int minleafrecs; /* min records in leaf block */ 6030f712c9SDave Chinner int minnoderecs; /* min records in node block */ 6130f712c9SDave Chinner int sz; /* root block size */ 6230f712c9SDave Chinner 6330f712c9SDave Chinner /* 64daf83964SChristoph Hellwig * The maximum number of extents in a file, hence the maximum number of 65daf83964SChristoph Hellwig * leaf entries, is controlled by the size of the on-disk extent count, 66daf83964SChristoph Hellwig * either a signed 32-bit number for the data fork, or a signed 16-bit 67daf83964SChristoph Hellwig * number for the attr fork. 6830f712c9SDave Chinner * 697821ea30SChristoph Hellwig * Note that we can no longer assume that if we are in ATTR1 that the 707821ea30SChristoph Hellwig * fork offset of all the inodes will be 717821ea30SChristoph Hellwig * (xfs_default_attroffset(ip) >> 3) because we could have mounted with 727821ea30SChristoph Hellwig * ATTR2 and then mounted back with ATTR1, keeping the i_forkoff's fixed 737821ea30SChristoph Hellwig * but probably at various positions. Therefore, for both ATTR1 and 747821ea30SChristoph Hellwig * ATTR2 we have to assume the worst case scenario of a minimum size 757821ea30SChristoph Hellwig * available. 7630f712c9SDave Chinner */ 7730f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) { 7830f712c9SDave Chinner maxleafents = MAXEXTNUM; 7930f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); 8030f712c9SDave Chinner } else { 8130f712c9SDave Chinner maxleafents = MAXAEXTNUM; 8230f712c9SDave Chinner sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); 8330f712c9SDave Chinner } 8430f712c9SDave Chinner maxrootrecs = xfs_bmdr_maxrecs(sz, 0); 8530f712c9SDave Chinner minleafrecs = mp->m_bmap_dmnr[0]; 8630f712c9SDave Chinner minnoderecs = mp->m_bmap_dmnr[1]; 8730f712c9SDave Chinner maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; 8830f712c9SDave Chinner for (level = 1; maxblocks > 1; level++) { 8930f712c9SDave Chinner if (maxblocks <= maxrootrecs) 9030f712c9SDave Chinner maxblocks = 1; 9130f712c9SDave Chinner else 9230f712c9SDave Chinner maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; 9330f712c9SDave Chinner } 9430f712c9SDave Chinner mp->m_bm_maxlevels[whichfork] = level; 9530f712c9SDave Chinner } 9630f712c9SDave Chinner 9730f712c9SDave Chinner STATIC int /* error */ 9830f712c9SDave Chinner xfs_bmbt_lookup_eq( 9930f712c9SDave Chinner struct xfs_btree_cur *cur, 100e16cf9b0SChristoph Hellwig struct xfs_bmbt_irec *irec, 10130f712c9SDave Chinner int *stat) /* success/failure */ 10230f712c9SDave Chinner { 103e16cf9b0SChristoph Hellwig cur->bc_rec.b = *irec; 10430f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); 10530f712c9SDave Chinner } 10630f712c9SDave Chinner 10730f712c9SDave Chinner STATIC int /* error */ 108b5cfbc22SChristoph Hellwig xfs_bmbt_lookup_first( 10930f712c9SDave Chinner struct xfs_btree_cur *cur, 11030f712c9SDave Chinner int *stat) /* success/failure */ 11130f712c9SDave Chinner { 112b5cfbc22SChristoph Hellwig cur->bc_rec.b.br_startoff = 0; 113b5cfbc22SChristoph Hellwig cur->bc_rec.b.br_startblock = 0; 114b5cfbc22SChristoph Hellwig cur->bc_rec.b.br_blockcount = 0; 11530f712c9SDave Chinner return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); 11630f712c9SDave Chinner } 11730f712c9SDave Chinner 11830f712c9SDave Chinner /* 11930f712c9SDave Chinner * Check if the inode needs to be converted to btree format. 12030f712c9SDave Chinner */ 12130f712c9SDave Chinner static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) 12230f712c9SDave Chinner { 123daf83964SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 124daf83964SChristoph Hellwig 12560b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 126f7e67b20SChristoph Hellwig ifp->if_format == XFS_DINODE_FMT_EXTENTS && 127daf83964SChristoph Hellwig ifp->if_nextents > XFS_IFORK_MAXEXT(ip, whichfork); 12830f712c9SDave Chinner } 12930f712c9SDave Chinner 13030f712c9SDave Chinner /* 13130f712c9SDave Chinner * Check if the inode should be converted to extent format. 13230f712c9SDave Chinner */ 13330f712c9SDave Chinner static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) 13430f712c9SDave Chinner { 135daf83964SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 136daf83964SChristoph Hellwig 13760b4984fSDarrick J. Wong return whichfork != XFS_COW_FORK && 138f7e67b20SChristoph Hellwig ifp->if_format == XFS_DINODE_FMT_BTREE && 139daf83964SChristoph Hellwig ifp->if_nextents <= XFS_IFORK_MAXEXT(ip, whichfork); 14030f712c9SDave Chinner } 14130f712c9SDave Chinner 14230f712c9SDave Chinner /* 143a67d00a5SChristoph Hellwig * Update the record referred to by cur to the value given by irec 14430f712c9SDave Chinner * This either works (return 0) or gets an EFSCORRUPTED error. 14530f712c9SDave Chinner */ 14630f712c9SDave Chinner STATIC int 14730f712c9SDave Chinner xfs_bmbt_update( 14830f712c9SDave Chinner struct xfs_btree_cur *cur, 149a67d00a5SChristoph Hellwig struct xfs_bmbt_irec *irec) 15030f712c9SDave Chinner { 15130f712c9SDave Chinner union xfs_btree_rec rec; 15230f712c9SDave Chinner 153a67d00a5SChristoph Hellwig xfs_bmbt_disk_set_all(&rec.bmbt, irec); 15430f712c9SDave Chinner return xfs_btree_update(cur, &rec); 15530f712c9SDave Chinner } 15630f712c9SDave Chinner 15730f712c9SDave Chinner /* 15830f712c9SDave Chinner * Compute the worst-case number of indirect blocks that will be used 15930f712c9SDave Chinner * for ip's delayed extent of length "len". 16030f712c9SDave Chinner */ 16130f712c9SDave Chinner STATIC xfs_filblks_t 16230f712c9SDave Chinner xfs_bmap_worst_indlen( 16330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 16430f712c9SDave Chinner xfs_filblks_t len) /* delayed extent length */ 16530f712c9SDave Chinner { 16630f712c9SDave Chinner int level; /* btree level number */ 16730f712c9SDave Chinner int maxrecs; /* maximum record count at this level */ 16830f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 16930f712c9SDave Chinner xfs_filblks_t rval; /* return value */ 17030f712c9SDave Chinner 17130f712c9SDave Chinner mp = ip->i_mount; 17230f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[0]; 17330f712c9SDave Chinner for (level = 0, rval = 0; 17430f712c9SDave Chinner level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); 17530f712c9SDave Chinner level++) { 17630f712c9SDave Chinner len += maxrecs - 1; 17730f712c9SDave Chinner do_div(len, maxrecs); 17830f712c9SDave Chinner rval += len; 1795e5c943cSDarrick J. Wong if (len == 1) 1805e5c943cSDarrick J. Wong return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - 18130f712c9SDave Chinner level - 1; 18230f712c9SDave Chinner if (level == 0) 18330f712c9SDave Chinner maxrecs = mp->m_bmap_dmxr[1]; 18430f712c9SDave Chinner } 18530f712c9SDave Chinner return rval; 18630f712c9SDave Chinner } 18730f712c9SDave Chinner 18830f712c9SDave Chinner /* 18930f712c9SDave Chinner * Calculate the default attribute fork offset for newly created inodes. 19030f712c9SDave Chinner */ 19130f712c9SDave Chinner uint 19230f712c9SDave Chinner xfs_default_attroffset( 19330f712c9SDave Chinner struct xfs_inode *ip) 19430f712c9SDave Chinner { 19530f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 19630f712c9SDave Chinner uint offset; 19730f712c9SDave Chinner 198*683ec9baSDave Chinner if (ip->i_df.if_format == XFS_DINODE_FMT_DEV) 199*683ec9baSDave Chinner return roundup(sizeof(xfs_dev_t), 8); 200*683ec9baSDave Chinner 201e9e2eae8SChristoph Hellwig if (mp->m_sb.sb_inodesize == 256) 202e9e2eae8SChristoph Hellwig offset = XFS_LITINO(mp) - XFS_BMDR_SPACE_CALC(MINABTPTRS); 203e9e2eae8SChristoph Hellwig else 20430f712c9SDave Chinner offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); 20530f712c9SDave Chinner 206e9e2eae8SChristoph Hellwig ASSERT(offset < XFS_LITINO(mp)); 20730f712c9SDave Chinner return offset; 20830f712c9SDave Chinner } 20930f712c9SDave Chinner 21030f712c9SDave Chinner /* 2117821ea30SChristoph Hellwig * Helper routine to reset inode i_forkoff field when switching attribute fork 2127821ea30SChristoph Hellwig * from local to extent format - we reset it where possible to make space 2137821ea30SChristoph Hellwig * available for inline data fork extents. 21430f712c9SDave Chinner */ 21530f712c9SDave Chinner STATIC void 21630f712c9SDave Chinner xfs_bmap_forkoff_reset( 21730f712c9SDave Chinner xfs_inode_t *ip, 21830f712c9SDave Chinner int whichfork) 21930f712c9SDave Chinner { 22030f712c9SDave Chinner if (whichfork == XFS_ATTR_FORK && 221f7e67b20SChristoph Hellwig ip->i_df.if_format != XFS_DINODE_FMT_DEV && 222f7e67b20SChristoph Hellwig ip->i_df.if_format != XFS_DINODE_FMT_BTREE) { 22330f712c9SDave Chinner uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; 22430f712c9SDave Chinner 2257821ea30SChristoph Hellwig if (dfl_forkoff > ip->i_forkoff) 2267821ea30SChristoph Hellwig ip->i_forkoff = dfl_forkoff; 22730f712c9SDave Chinner } 22830f712c9SDave Chinner } 22930f712c9SDave Chinner 23030f712c9SDave Chinner #ifdef DEBUG 23130f712c9SDave Chinner STATIC struct xfs_buf * 23230f712c9SDave Chinner xfs_bmap_get_bp( 23330f712c9SDave Chinner struct xfs_btree_cur *cur, 23430f712c9SDave Chinner xfs_fsblock_t bno) 23530f712c9SDave Chinner { 236e6631f85SDave Chinner struct xfs_log_item *lip; 23730f712c9SDave Chinner int i; 23830f712c9SDave Chinner 23930f712c9SDave Chinner if (!cur) 24030f712c9SDave Chinner return NULL; 24130f712c9SDave Chinner 24230f712c9SDave Chinner for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { 24330f712c9SDave Chinner if (!cur->bc_bufs[i]) 24430f712c9SDave Chinner break; 24530f712c9SDave Chinner if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) 24630f712c9SDave Chinner return cur->bc_bufs[i]; 24730f712c9SDave Chinner } 24830f712c9SDave Chinner 24930f712c9SDave Chinner /* Chase down all the log items to see if the bp is there */ 250e6631f85SDave Chinner list_for_each_entry(lip, &cur->bc_tp->t_items, li_trans) { 251e6631f85SDave Chinner struct xfs_buf_log_item *bip = (struct xfs_buf_log_item *)lip; 252e6631f85SDave Chinner 25330f712c9SDave Chinner if (bip->bli_item.li_type == XFS_LI_BUF && 25430f712c9SDave Chinner XFS_BUF_ADDR(bip->bli_buf) == bno) 25530f712c9SDave Chinner return bip->bli_buf; 25630f712c9SDave Chinner } 25730f712c9SDave Chinner 25830f712c9SDave Chinner return NULL; 25930f712c9SDave Chinner } 26030f712c9SDave Chinner 26130f712c9SDave Chinner STATIC void 26230f712c9SDave Chinner xfs_check_block( 26330f712c9SDave Chinner struct xfs_btree_block *block, 26430f712c9SDave Chinner xfs_mount_t *mp, 26530f712c9SDave Chinner int root, 26630f712c9SDave Chinner short sz) 26730f712c9SDave Chinner { 26830f712c9SDave Chinner int i, j, dmxr; 26930f712c9SDave Chinner __be64 *pp, *thispa; /* pointer to block address */ 27030f712c9SDave Chinner xfs_bmbt_key_t *prevp, *keyp; 27130f712c9SDave Chinner 27230f712c9SDave Chinner ASSERT(be16_to_cpu(block->bb_level) > 0); 27330f712c9SDave Chinner 27430f712c9SDave Chinner prevp = NULL; 27530f712c9SDave Chinner for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { 27630f712c9SDave Chinner dmxr = mp->m_bmap_dmxr[0]; 27730f712c9SDave Chinner keyp = XFS_BMBT_KEY_ADDR(mp, block, i); 27830f712c9SDave Chinner 27930f712c9SDave Chinner if (prevp) { 28030f712c9SDave Chinner ASSERT(be64_to_cpu(prevp->br_startoff) < 28130f712c9SDave Chinner be64_to_cpu(keyp->br_startoff)); 28230f712c9SDave Chinner } 28330f712c9SDave Chinner prevp = keyp; 28430f712c9SDave Chinner 28530f712c9SDave Chinner /* 28630f712c9SDave Chinner * Compare the block numbers to see if there are dups. 28730f712c9SDave Chinner */ 28830f712c9SDave Chinner if (root) 28930f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); 29030f712c9SDave Chinner else 29130f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); 29230f712c9SDave Chinner 29330f712c9SDave Chinner for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { 29430f712c9SDave Chinner if (root) 29530f712c9SDave Chinner thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); 29630f712c9SDave Chinner else 29730f712c9SDave Chinner thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); 29830f712c9SDave Chinner if (*thispa == *pp) { 29930f712c9SDave Chinner xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", 30030f712c9SDave Chinner __func__, j, i, 30130f712c9SDave Chinner (unsigned long long)be64_to_cpu(*thispa)); 302cec57256SDarrick J. Wong xfs_err(mp, "%s: ptrs are equal in node\n", 30330f712c9SDave Chinner __func__); 304cec57256SDarrick J. Wong xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 30530f712c9SDave Chinner } 30630f712c9SDave Chinner } 30730f712c9SDave Chinner } 30830f712c9SDave Chinner } 30930f712c9SDave Chinner 31030f712c9SDave Chinner /* 31130f712c9SDave Chinner * Check that the extents for the inode ip are in the right order in all 312e3543819SDave Chinner * btree leaves. THis becomes prohibitively expensive for large extent count 313e3543819SDave Chinner * files, so don't bother with inodes that have more than 10,000 extents in 314e3543819SDave Chinner * them. The btree record ordering checks will still be done, so for such large 315e3543819SDave Chinner * bmapbt constructs that is going to catch most corruptions. 31630f712c9SDave Chinner */ 31730f712c9SDave Chinner STATIC void 31830f712c9SDave Chinner xfs_bmap_check_leaf_extents( 31930f712c9SDave Chinner xfs_btree_cur_t *cur, /* btree cursor or null */ 32030f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 32130f712c9SDave Chinner int whichfork) /* data or attr fork */ 32230f712c9SDave Chinner { 323f7e67b20SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 324f7e67b20SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 32530f712c9SDave Chinner struct xfs_btree_block *block; /* current btree block */ 32630f712c9SDave Chinner xfs_fsblock_t bno; /* block # of "block" */ 327e8222613SDave Chinner struct xfs_buf *bp; /* buffer for "block" */ 32830f712c9SDave Chinner int error; /* error return value */ 32930f712c9SDave Chinner xfs_extnum_t i=0, j; /* index into the extents list */ 33030f712c9SDave Chinner int level; /* btree level, for checking */ 33130f712c9SDave Chinner __be64 *pp; /* pointer to block address */ 33230f712c9SDave Chinner xfs_bmbt_rec_t *ep; /* pointer to current extent */ 33330f712c9SDave Chinner xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ 33430f712c9SDave Chinner xfs_bmbt_rec_t *nextp; /* pointer to next extent */ 33530f712c9SDave Chinner int bp_release = 0; 33630f712c9SDave Chinner 337f7e67b20SChristoph Hellwig if (ifp->if_format != XFS_DINODE_FMT_BTREE) 33830f712c9SDave Chinner return; 33930f712c9SDave Chinner 340e3543819SDave Chinner /* skip large extent count inodes */ 341daf83964SChristoph Hellwig if (ip->i_df.if_nextents > 10000) 342e3543819SDave Chinner return; 343e3543819SDave Chinner 34430f712c9SDave Chinner bno = NULLFSBLOCK; 34530f712c9SDave Chinner block = ifp->if_broot; 34630f712c9SDave Chinner /* 34730f712c9SDave Chinner * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. 34830f712c9SDave Chinner */ 34930f712c9SDave Chinner level = be16_to_cpu(block->bb_level); 35030f712c9SDave Chinner ASSERT(level > 0); 35130f712c9SDave Chinner xfs_check_block(block, mp, 1, ifp->if_broot_bytes); 35230f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); 35330f712c9SDave Chinner bno = be64_to_cpu(*pp); 35430f712c9SDave Chinner 355d5cf09baSChristoph Hellwig ASSERT(bno != NULLFSBLOCK); 35630f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); 35730f712c9SDave Chinner ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); 35830f712c9SDave Chinner 35930f712c9SDave Chinner /* 36030f712c9SDave Chinner * Go down the tree until leaf level is reached, following the first 36130f712c9SDave Chinner * pointer (leftmost) at each level. 36230f712c9SDave Chinner */ 36330f712c9SDave Chinner while (level-- > 0) { 36430f712c9SDave Chinner /* See if buf is in cur first */ 36530f712c9SDave Chinner bp_release = 0; 36630f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 36730f712c9SDave Chinner if (!bp) { 36830f712c9SDave Chinner bp_release = 1; 369f5b999c0SEric Sandeen error = xfs_btree_read_bufl(mp, NULL, bno, &bp, 37030f712c9SDave Chinner XFS_BMAP_BTREE_REF, 37130f712c9SDave Chinner &xfs_bmbt_buf_ops); 37230f712c9SDave Chinner if (error) 37330f712c9SDave Chinner goto error_norelse; 37430f712c9SDave Chinner } 37530f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 37630f712c9SDave Chinner if (level == 0) 37730f712c9SDave Chinner break; 37830f712c9SDave Chinner 37930f712c9SDave Chinner /* 38030f712c9SDave Chinner * Check this block for basic sanity (increasing keys and 38130f712c9SDave Chinner * no duplicate blocks). 38230f712c9SDave Chinner */ 38330f712c9SDave Chinner 38430f712c9SDave Chinner xfs_check_block(block, mp, 0, 0); 38530f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); 38630f712c9SDave Chinner bno = be64_to_cpu(*pp); 387f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, !xfs_verify_fsbno(mp, bno))) { 388f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 389f9e03706SDarrick J. Wong goto error0; 390f9e03706SDarrick J. Wong } 39130f712c9SDave Chinner if (bp_release) { 39230f712c9SDave Chinner bp_release = 0; 39330f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 39430f712c9SDave Chinner } 39530f712c9SDave Chinner } 39630f712c9SDave Chinner 39730f712c9SDave Chinner /* 39830f712c9SDave Chinner * Here with bp and block set to the leftmost leaf node in the tree. 39930f712c9SDave Chinner */ 40030f712c9SDave Chinner i = 0; 40130f712c9SDave Chinner 40230f712c9SDave Chinner /* 40330f712c9SDave Chinner * Loop over all leaf nodes checking that all extents are in the right order. 40430f712c9SDave Chinner */ 40530f712c9SDave Chinner for (;;) { 40630f712c9SDave Chinner xfs_fsblock_t nextbno; 40730f712c9SDave Chinner xfs_extnum_t num_recs; 40830f712c9SDave Chinner 40930f712c9SDave Chinner 41030f712c9SDave Chinner num_recs = xfs_btree_get_numrecs(block); 41130f712c9SDave Chinner 41230f712c9SDave Chinner /* 41330f712c9SDave Chinner * Read-ahead the next leaf block, if any. 41430f712c9SDave Chinner */ 41530f712c9SDave Chinner 41630f712c9SDave Chinner nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); 41730f712c9SDave Chinner 41830f712c9SDave Chinner /* 41930f712c9SDave Chinner * Check all the extents to make sure they are OK. 42030f712c9SDave Chinner * If we had a previous block, the last entry should 42130f712c9SDave Chinner * conform with the first entry in this one. 42230f712c9SDave Chinner */ 42330f712c9SDave Chinner 42430f712c9SDave Chinner ep = XFS_BMBT_REC_ADDR(mp, block, 1); 42530f712c9SDave Chinner if (i) { 42630f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(&last) + 42730f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(&last) <= 42830f712c9SDave Chinner xfs_bmbt_disk_get_startoff(ep)); 42930f712c9SDave Chinner } 43030f712c9SDave Chinner for (j = 1; j < num_recs; j++) { 43130f712c9SDave Chinner nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); 43230f712c9SDave Chinner ASSERT(xfs_bmbt_disk_get_startoff(ep) + 43330f712c9SDave Chinner xfs_bmbt_disk_get_blockcount(ep) <= 43430f712c9SDave Chinner xfs_bmbt_disk_get_startoff(nextp)); 43530f712c9SDave Chinner ep = nextp; 43630f712c9SDave Chinner } 43730f712c9SDave Chinner 43830f712c9SDave Chinner last = *ep; 43930f712c9SDave Chinner i += num_recs; 44030f712c9SDave Chinner if (bp_release) { 44130f712c9SDave Chinner bp_release = 0; 44230f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 44330f712c9SDave Chinner } 44430f712c9SDave Chinner bno = nextbno; 44530f712c9SDave Chinner /* 44630f712c9SDave Chinner * If we've reached the end, stop. 44730f712c9SDave Chinner */ 44830f712c9SDave Chinner if (bno == NULLFSBLOCK) 44930f712c9SDave Chinner break; 45030f712c9SDave Chinner 45130f712c9SDave Chinner bp_release = 0; 45230f712c9SDave Chinner bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); 45330f712c9SDave Chinner if (!bp) { 45430f712c9SDave Chinner bp_release = 1; 455f5b999c0SEric Sandeen error = xfs_btree_read_bufl(mp, NULL, bno, &bp, 45630f712c9SDave Chinner XFS_BMAP_BTREE_REF, 45730f712c9SDave Chinner &xfs_bmbt_buf_ops); 45830f712c9SDave Chinner if (error) 45930f712c9SDave Chinner goto error_norelse; 46030f712c9SDave Chinner } 46130f712c9SDave Chinner block = XFS_BUF_TO_BLOCK(bp); 46230f712c9SDave Chinner } 463a5fd276bSLuis de Bethencourt 46430f712c9SDave Chinner return; 46530f712c9SDave Chinner 46630f712c9SDave Chinner error0: 46730f712c9SDave Chinner xfs_warn(mp, "%s: at error0", __func__); 46830f712c9SDave Chinner if (bp_release) 46930f712c9SDave Chinner xfs_trans_brelse(NULL, bp); 47030f712c9SDave Chinner error_norelse: 47130f712c9SDave Chinner xfs_warn(mp, "%s: BAD after btree leaves for %d extents", 47230f712c9SDave Chinner __func__, i); 473cec57256SDarrick J. Wong xfs_err(mp, "%s: CORRUPTED BTREE OR SOMETHING", __func__); 474cec57256SDarrick J. Wong xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); 47530f712c9SDave Chinner return; 47630f712c9SDave Chinner } 47730f712c9SDave Chinner 47830f712c9SDave Chinner /* 47930f712c9SDave Chinner * Validate that the bmbt_irecs being returned from bmapi are valid 48030f712c9SDave Chinner * given the caller's original parameters. Specifically check the 48130f712c9SDave Chinner * ranges of the returned irecs to ensure that they only extend beyond 48230f712c9SDave Chinner * the given parameters if the XFS_BMAPI_ENTIRE flag was set. 48330f712c9SDave Chinner */ 48430f712c9SDave Chinner STATIC void 48530f712c9SDave Chinner xfs_bmap_validate_ret( 48630f712c9SDave Chinner xfs_fileoff_t bno, 48730f712c9SDave Chinner xfs_filblks_t len, 48830f712c9SDave Chinner int flags, 48930f712c9SDave Chinner xfs_bmbt_irec_t *mval, 49030f712c9SDave Chinner int nmap, 49130f712c9SDave Chinner int ret_nmap) 49230f712c9SDave Chinner { 49330f712c9SDave Chinner int i; /* index to map values */ 49430f712c9SDave Chinner 49530f712c9SDave Chinner ASSERT(ret_nmap <= nmap); 49630f712c9SDave Chinner 49730f712c9SDave Chinner for (i = 0; i < ret_nmap; i++) { 49830f712c9SDave Chinner ASSERT(mval[i].br_blockcount > 0); 49930f712c9SDave Chinner if (!(flags & XFS_BMAPI_ENTIRE)) { 50030f712c9SDave Chinner ASSERT(mval[i].br_startoff >= bno); 50130f712c9SDave Chinner ASSERT(mval[i].br_blockcount <= len); 50230f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= 50330f712c9SDave Chinner bno + len); 50430f712c9SDave Chinner } else { 50530f712c9SDave Chinner ASSERT(mval[i].br_startoff < bno + len); 50630f712c9SDave Chinner ASSERT(mval[i].br_startoff + mval[i].br_blockcount > 50730f712c9SDave Chinner bno); 50830f712c9SDave Chinner } 50930f712c9SDave Chinner ASSERT(i == 0 || 51030f712c9SDave Chinner mval[i - 1].br_startoff + mval[i - 1].br_blockcount == 51130f712c9SDave Chinner mval[i].br_startoff); 51230f712c9SDave Chinner ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && 51330f712c9SDave Chinner mval[i].br_startblock != HOLESTARTBLOCK); 51430f712c9SDave Chinner ASSERT(mval[i].br_state == XFS_EXT_NORM || 51530f712c9SDave Chinner mval[i].br_state == XFS_EXT_UNWRITTEN); 51630f712c9SDave Chinner } 51730f712c9SDave Chinner } 51830f712c9SDave Chinner 51930f712c9SDave Chinner #else 52030f712c9SDave Chinner #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) 5217bf7a193SDarrick J. Wong #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) do { } while (0) 52230f712c9SDave Chinner #endif /* DEBUG */ 52330f712c9SDave Chinner 52430f712c9SDave Chinner /* 52530f712c9SDave Chinner * bmap free list manipulation functions 52630f712c9SDave Chinner */ 52730f712c9SDave Chinner 52830f712c9SDave Chinner /* 52930f712c9SDave Chinner * Add the extent to the list of extents to be free at transaction end. 53030f712c9SDave Chinner * The list is maintained sorted (by block number). 53130f712c9SDave Chinner */ 53230f712c9SDave Chinner void 533fcb762f5SBrian Foster __xfs_bmap_add_free( 5340f37d178SBrian Foster struct xfs_trans *tp, 535340785ccSDarrick J. Wong xfs_fsblock_t bno, 536340785ccSDarrick J. Wong xfs_filblks_t len, 53766e3237eSDarrick J. Wong const struct xfs_owner_info *oinfo, 538fcb762f5SBrian Foster bool skip_discard) 53930f712c9SDave Chinner { 540310a75a3SDarrick J. Wong struct xfs_extent_free_item *new; /* new element */ 54130f712c9SDave Chinner #ifdef DEBUG 5420f37d178SBrian Foster struct xfs_mount *mp = tp->t_mountp; 54330f712c9SDave Chinner xfs_agnumber_t agno; 54430f712c9SDave Chinner xfs_agblock_t agbno; 54530f712c9SDave Chinner 54630f712c9SDave Chinner ASSERT(bno != NULLFSBLOCK); 54730f712c9SDave Chinner ASSERT(len > 0); 54830f712c9SDave Chinner ASSERT(len <= MAXEXTLEN); 54930f712c9SDave Chinner ASSERT(!isnullstartblock(bno)); 55030f712c9SDave Chinner agno = XFS_FSB_TO_AGNO(mp, bno); 55130f712c9SDave Chinner agbno = XFS_FSB_TO_AGBNO(mp, bno); 55230f712c9SDave Chinner ASSERT(agno < mp->m_sb.sb_agcount); 55330f712c9SDave Chinner ASSERT(agbno < mp->m_sb.sb_agblocks); 55430f712c9SDave Chinner ASSERT(len < mp->m_sb.sb_agblocks); 55530f712c9SDave Chinner ASSERT(agbno + len <= mp->m_sb.sb_agblocks); 55630f712c9SDave Chinner #endif 55730f712c9SDave Chinner ASSERT(xfs_bmap_free_item_zone != NULL); 558340785ccSDarrick J. Wong 5593050bd0bSCarlos Maiolino new = kmem_cache_alloc(xfs_bmap_free_item_zone, 5603050bd0bSCarlos Maiolino GFP_KERNEL | __GFP_NOFAIL); 561310a75a3SDarrick J. Wong new->xefi_startblock = bno; 562310a75a3SDarrick J. Wong new->xefi_blockcount = (xfs_extlen_t)len; 563340785ccSDarrick J. Wong if (oinfo) 564340785ccSDarrick J. Wong new->xefi_oinfo = *oinfo; 565340785ccSDarrick J. Wong else 5667280fedaSDarrick J. Wong new->xefi_oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; 567fcb762f5SBrian Foster new->xefi_skip_discard = skip_discard; 5680f37d178SBrian Foster trace_xfs_bmap_free_defer(tp->t_mountp, 5690f37d178SBrian Foster XFS_FSB_TO_AGNO(tp->t_mountp, bno), 0, 5700f37d178SBrian Foster XFS_FSB_TO_AGBNO(tp->t_mountp, bno), len); 5710f37d178SBrian Foster xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_FREE, &new->xefi_list); 57230f712c9SDave Chinner } 57330f712c9SDave Chinner 57430f712c9SDave Chinner /* 57530f712c9SDave Chinner * Inode fork format manipulation functions 57630f712c9SDave Chinner */ 57730f712c9SDave Chinner 57830f712c9SDave Chinner /* 579b101e334SChristoph Hellwig * Convert the inode format to extent format if it currently is in btree format, 580b101e334SChristoph Hellwig * but the extent list is small enough that it fits into the extent format. 581b101e334SChristoph Hellwig * 582b101e334SChristoph Hellwig * Since the extents are already in-core, all we have to do is give up the space 583b101e334SChristoph Hellwig * for the btree root and pitch the leaf block. 58430f712c9SDave Chinner */ 58530f712c9SDave Chinner STATIC int /* error */ 58630f712c9SDave Chinner xfs_bmap_btree_to_extents( 587b101e334SChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 588b101e334SChristoph Hellwig struct xfs_inode *ip, /* incore inode pointer */ 589b101e334SChristoph Hellwig struct xfs_btree_cur *cur, /* btree cursor */ 59030f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 59130f712c9SDave Chinner int whichfork) /* data or attr fork */ 59230f712c9SDave Chinner { 593b101e334SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 594b101e334SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 595b101e334SChristoph Hellwig struct xfs_btree_block *rblock = ifp->if_broot; 59630f712c9SDave Chinner struct xfs_btree_block *cblock;/* child btree block */ 59730f712c9SDave Chinner xfs_fsblock_t cbno; /* child block number */ 598e8222613SDave Chinner struct xfs_buf *cbp; /* child block's buffer */ 59930f712c9SDave Chinner int error; /* error return value */ 60030f712c9SDave Chinner __be64 *pp; /* ptr to block address */ 601340785ccSDarrick J. Wong struct xfs_owner_info oinfo; 60230f712c9SDave Chinner 603b101e334SChristoph Hellwig /* check if we actually need the extent format first: */ 604b101e334SChristoph Hellwig if (!xfs_bmap_wants_extents(ip, whichfork)) 605b101e334SChristoph Hellwig return 0; 606b101e334SChristoph Hellwig 607b101e334SChristoph Hellwig ASSERT(cur); 60860b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 60930f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 610f7e67b20SChristoph Hellwig ASSERT(ifp->if_format == XFS_DINODE_FMT_BTREE); 61130f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_level) == 1); 61230f712c9SDave Chinner ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); 61330f712c9SDave Chinner ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); 614b101e334SChristoph Hellwig 61530f712c9SDave Chinner pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); 61630f712c9SDave Chinner cbno = be64_to_cpu(*pp); 61730f712c9SDave Chinner #ifdef DEBUG 618f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(cur->bc_mp, !xfs_btree_check_lptr(cur, cbno, 1))) 619f9e03706SDarrick J. Wong return -EFSCORRUPTED; 62030f712c9SDave Chinner #endif 621f5b999c0SEric Sandeen error = xfs_btree_read_bufl(mp, tp, cbno, &cbp, XFS_BMAP_BTREE_REF, 62230f712c9SDave Chinner &xfs_bmbt_buf_ops); 62330f712c9SDave Chinner if (error) 62430f712c9SDave Chinner return error; 62530f712c9SDave Chinner cblock = XFS_BUF_TO_BLOCK(cbp); 62630f712c9SDave Chinner if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) 62730f712c9SDave Chinner return error; 628340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork); 6290f37d178SBrian Foster xfs_bmap_add_free(cur->bc_tp, cbno, 1, &oinfo); 6306e73a545SChristoph Hellwig ip->i_nblocks--; 63130f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); 63230f712c9SDave Chinner xfs_trans_binval(tp, cbp); 63330f712c9SDave Chinner if (cur->bc_bufs[0] == cbp) 63430f712c9SDave Chinner cur->bc_bufs[0] = NULL; 63530f712c9SDave Chinner xfs_iroot_realloc(ip, -1, whichfork); 63630f712c9SDave Chinner ASSERT(ifp->if_broot == NULL); 63730f712c9SDave Chinner ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); 638f7e67b20SChristoph Hellwig ifp->if_format = XFS_DINODE_FMT_EXTENTS; 639b101e334SChristoph Hellwig *logflagsp |= XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 64030f712c9SDave Chinner return 0; 64130f712c9SDave Chinner } 64230f712c9SDave Chinner 64330f712c9SDave Chinner /* 64430f712c9SDave Chinner * Convert an extents-format file into a btree-format file. 64530f712c9SDave Chinner * The new file will have a root block (in the inode) and a single child block. 64630f712c9SDave Chinner */ 64730f712c9SDave Chinner STATIC int /* error */ 64830f712c9SDave Chinner xfs_bmap_extents_to_btree( 64981ba8f3eSBrian Foster struct xfs_trans *tp, /* transaction pointer */ 65081ba8f3eSBrian Foster struct xfs_inode *ip, /* incore inode pointer */ 65181ba8f3eSBrian Foster struct xfs_btree_cur **curp, /* cursor returned to caller */ 65230f712c9SDave Chinner int wasdel, /* converting a delayed alloc */ 65330f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 65430f712c9SDave Chinner int whichfork) /* data or attr fork */ 65530f712c9SDave Chinner { 65630f712c9SDave Chinner struct xfs_btree_block *ablock; /* allocated (child) bt block */ 65781ba8f3eSBrian Foster struct xfs_buf *abp; /* buffer for ablock */ 65881ba8f3eSBrian Foster struct xfs_alloc_arg args; /* allocation arguments */ 65981ba8f3eSBrian Foster struct xfs_bmbt_rec *arp; /* child record pointer */ 66030f712c9SDave Chinner struct xfs_btree_block *block; /* btree root block */ 66181ba8f3eSBrian Foster struct xfs_btree_cur *cur; /* bmap btree cursor */ 66230f712c9SDave Chinner int error; /* error return value */ 66381ba8f3eSBrian Foster struct xfs_ifork *ifp; /* inode fork pointer */ 66481ba8f3eSBrian Foster struct xfs_bmbt_key *kp; /* root block key pointer */ 66581ba8f3eSBrian Foster struct xfs_mount *mp; /* mount structure */ 66630f712c9SDave Chinner xfs_bmbt_ptr_t *pp; /* root block address pointer */ 667b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 668906abed5SChristoph Hellwig struct xfs_bmbt_irec rec; 669b2b1712aSChristoph Hellwig xfs_extnum_t cnt = 0; 67030f712c9SDave Chinner 67130f712c9SDave Chinner mp = ip->i_mount; 67260b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 67330f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 674f7e67b20SChristoph Hellwig ASSERT(ifp->if_format == XFS_DINODE_FMT_EXTENTS); 67530f712c9SDave Chinner 67630f712c9SDave Chinner /* 677e55ec4ddSDave Chinner * Make space in the inode incore. This needs to be undone if we fail 678e55ec4ddSDave Chinner * to expand the root. 67930f712c9SDave Chinner */ 68030f712c9SDave Chinner xfs_iroot_realloc(ip, 1, whichfork); 68130f712c9SDave Chinner ifp->if_flags |= XFS_IFBROOT; 68230f712c9SDave Chinner 68330f712c9SDave Chinner /* 68430f712c9SDave Chinner * Fill in the root. 68530f712c9SDave Chinner */ 68630f712c9SDave Chinner block = ifp->if_broot; 68730f712c9SDave Chinner xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, 688b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 1, 1, ip->i_ino, 689f88ae46bSEric Sandeen XFS_BTREE_LONG_PTRS); 69030f712c9SDave Chinner /* 69130f712c9SDave Chinner * Need a cursor. Can't allocate until bb_level is filled in. 69230f712c9SDave Chinner */ 69330f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 6948ef54797SDave Chinner cur->bc_ino.flags = wasdel ? XFS_BTCUR_BMBT_WASDEL : 0; 69530f712c9SDave Chinner /* 69630f712c9SDave Chinner * Convert to a btree with two levels, one record in root. 69730f712c9SDave Chinner */ 698f7e67b20SChristoph Hellwig ifp->if_format = XFS_DINODE_FMT_BTREE; 69930f712c9SDave Chinner memset(&args, 0, sizeof(args)); 70030f712c9SDave Chinner args.tp = tp; 70130f712c9SDave Chinner args.mp = mp; 702340785ccSDarrick J. Wong xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); 703280253d2SBrian Foster if (tp->t_firstblock == NULLFSBLOCK) { 70430f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 70530f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); 7061214f1cfSBrian Foster } else if (tp->t_flags & XFS_TRANS_LOWMODE) { 70730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 708280253d2SBrian Foster args.fsbno = tp->t_firstblock; 70930f712c9SDave Chinner } else { 71030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 711280253d2SBrian Foster args.fsbno = tp->t_firstblock; 71230f712c9SDave Chinner } 71330f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 71430f712c9SDave Chinner args.wasdel = wasdel; 71530f712c9SDave Chinner *logflagsp = 0; 716e55ec4ddSDave Chinner error = xfs_alloc_vextent(&args); 717e55ec4ddSDave Chinner if (error) 718e55ec4ddSDave Chinner goto out_root_realloc; 71990e2056dSDarrick J. Wong 7202fcc319dSChristoph Hellwig if (WARN_ON_ONCE(args.fsbno == NULLFSBLOCK)) { 72101239d77SShan Hai error = -ENOSPC; 722e55ec4ddSDave Chinner goto out_root_realloc; 7232fcc319dSChristoph Hellwig } 724e55ec4ddSDave Chinner 72530f712c9SDave Chinner /* 72630f712c9SDave Chinner * Allocation can't fail, the space was reserved. 72730f712c9SDave Chinner */ 728280253d2SBrian Foster ASSERT(tp->t_firstblock == NULLFSBLOCK || 729280253d2SBrian Foster args.agno >= XFS_FSB_TO_AGNO(mp, tp->t_firstblock)); 730cf612de7SBrian Foster tp->t_firstblock = args.fsbno; 73192219c29SDave Chinner cur->bc_ino.allocated++; 7326e73a545SChristoph Hellwig ip->i_nblocks++; 73330f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); 734ee647f85SDarrick J. Wong error = xfs_trans_get_buf(tp, mp->m_ddev_targp, 735ee647f85SDarrick J. Wong XFS_FSB_TO_DADDR(mp, args.fsbno), 736ee647f85SDarrick J. Wong mp->m_bsize, 0, &abp); 737ee647f85SDarrick J. Wong if (error) 738e55ec4ddSDave Chinner goto out_unreserve_dquot; 739e55ec4ddSDave Chinner 74030f712c9SDave Chinner /* 74130f712c9SDave Chinner * Fill in the child block. 74230f712c9SDave Chinner */ 74330f712c9SDave Chinner abp->b_ops = &xfs_bmbt_buf_ops; 74430f712c9SDave Chinner ablock = XFS_BUF_TO_BLOCK(abp); 74530f712c9SDave Chinner xfs_btree_init_block_int(mp, ablock, abp->b_bn, 746b6f41e44SEric Sandeen XFS_BTNUM_BMAP, 0, 0, ip->i_ino, 74730f712c9SDave Chinner XFS_BTREE_LONG_PTRS); 74830f712c9SDave Chinner 749b2b1712aSChristoph Hellwig for_each_xfs_iext(ifp, &icur, &rec) { 750906abed5SChristoph Hellwig if (isnullstartblock(rec.br_startblock)) 751906abed5SChristoph Hellwig continue; 752906abed5SChristoph Hellwig arp = XFS_BMBT_REC_ADDR(mp, ablock, 1 + cnt); 753906abed5SChristoph Hellwig xfs_bmbt_disk_set_all(arp, &rec); 754906abed5SChristoph Hellwig cnt++; 75530f712c9SDave Chinner } 756daf83964SChristoph Hellwig ASSERT(cnt == ifp->if_nextents); 75730f712c9SDave Chinner xfs_btree_set_numrecs(ablock, cnt); 75830f712c9SDave Chinner 75930f712c9SDave Chinner /* 76030f712c9SDave Chinner * Fill in the root key and pointer. 76130f712c9SDave Chinner */ 76230f712c9SDave Chinner kp = XFS_BMBT_KEY_ADDR(mp, block, 1); 76330f712c9SDave Chinner arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); 76430f712c9SDave Chinner kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); 76530f712c9SDave Chinner pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, 76630f712c9SDave Chinner be16_to_cpu(block->bb_level))); 76730f712c9SDave Chinner *pp = cpu_to_be64(args.fsbno); 76830f712c9SDave Chinner 76930f712c9SDave Chinner /* 77030f712c9SDave Chinner * Do all this logging at the end so that 77130f712c9SDave Chinner * the root is at the right level. 77230f712c9SDave Chinner */ 77330f712c9SDave Chinner xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); 77430f712c9SDave Chinner xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); 77530f712c9SDave Chinner ASSERT(*curp == NULL); 77630f712c9SDave Chinner *curp = cur; 77730f712c9SDave Chinner *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); 77830f712c9SDave Chinner return 0; 77901239d77SShan Hai 780e55ec4ddSDave Chinner out_unreserve_dquot: 78101239d77SShan Hai xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); 782e55ec4ddSDave Chinner out_root_realloc: 78301239d77SShan Hai xfs_iroot_realloc(ip, -1, whichfork); 784f7e67b20SChristoph Hellwig ifp->if_format = XFS_DINODE_FMT_EXTENTS; 785e55ec4ddSDave Chinner ASSERT(ifp->if_broot == NULL); 78601239d77SShan Hai xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 78701239d77SShan Hai 78801239d77SShan Hai return error; 78930f712c9SDave Chinner } 79030f712c9SDave Chinner 79130f712c9SDave Chinner /* 79230f712c9SDave Chinner * Convert a local file to an extents file. 79330f712c9SDave Chinner * This code is out of bounds for data forks of regular files, 79430f712c9SDave Chinner * since the file data needs to get logged so things will stay consistent. 79530f712c9SDave Chinner * (The bmap-level manipulations are ok, though). 79630f712c9SDave Chinner */ 79730f712c9SDave Chinner void 79830f712c9SDave Chinner xfs_bmap_local_to_extents_empty( 799aeea4b75SBrian Foster struct xfs_trans *tp, 80030f712c9SDave Chinner struct xfs_inode *ip, 80130f712c9SDave Chinner int whichfork) 80230f712c9SDave Chinner { 80330f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 80430f712c9SDave Chinner 80560b4984fSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 806f7e67b20SChristoph Hellwig ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL); 80730f712c9SDave Chinner ASSERT(ifp->if_bytes == 0); 808daf83964SChristoph Hellwig ASSERT(ifp->if_nextents == 0); 80930f712c9SDave Chinner 81030f712c9SDave Chinner xfs_bmap_forkoff_reset(ip, whichfork); 81130f712c9SDave Chinner ifp->if_flags &= ~XFS_IFINLINE; 81230f712c9SDave Chinner ifp->if_flags |= XFS_IFEXTENTS; 8136bdcf26aSChristoph Hellwig ifp->if_u1.if_root = NULL; 8146bdcf26aSChristoph Hellwig ifp->if_height = 0; 815f7e67b20SChristoph Hellwig ifp->if_format = XFS_DINODE_FMT_EXTENTS; 816aeea4b75SBrian Foster xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 81730f712c9SDave Chinner } 81830f712c9SDave Chinner 81930f712c9SDave Chinner 82030f712c9SDave Chinner STATIC int /* error */ 82130f712c9SDave Chinner xfs_bmap_local_to_extents( 82230f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 82330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 82430f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed by transaction */ 82530f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 82630f712c9SDave Chinner int whichfork, 82730f712c9SDave Chinner void (*init_fn)(struct xfs_trans *tp, 82830f712c9SDave Chinner struct xfs_buf *bp, 82930f712c9SDave Chinner struct xfs_inode *ip, 83030f712c9SDave Chinner struct xfs_ifork *ifp)) 83130f712c9SDave Chinner { 83230f712c9SDave Chinner int error = 0; 83330f712c9SDave Chinner int flags; /* logging flags returned */ 8343ba738dfSChristoph Hellwig struct xfs_ifork *ifp; /* inode fork pointer */ 83530f712c9SDave Chinner xfs_alloc_arg_t args; /* allocation arguments */ 836e8222613SDave Chinner struct xfs_buf *bp; /* buffer for extent block */ 83750bb44c2SChristoph Hellwig struct xfs_bmbt_irec rec; 838b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 83930f712c9SDave Chinner 84030f712c9SDave Chinner /* 84130f712c9SDave Chinner * We don't want to deal with the case of keeping inode data inline yet. 84230f712c9SDave Chinner * So sending the data fork of a regular inode is invalid. 84330f712c9SDave Chinner */ 844c19b3b05SDave Chinner ASSERT(!(S_ISREG(VFS_I(ip)->i_mode) && whichfork == XFS_DATA_FORK)); 84530f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 846f7e67b20SChristoph Hellwig ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL); 84730f712c9SDave Chinner 84830f712c9SDave Chinner if (!ifp->if_bytes) { 849aeea4b75SBrian Foster xfs_bmap_local_to_extents_empty(tp, ip, whichfork); 85030f712c9SDave Chinner flags = XFS_ILOG_CORE; 85130f712c9SDave Chinner goto done; 85230f712c9SDave Chinner } 85330f712c9SDave Chinner 85430f712c9SDave Chinner flags = 0; 85530f712c9SDave Chinner error = 0; 8566bdcf26aSChristoph Hellwig ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS)) == XFS_IFINLINE); 85730f712c9SDave Chinner memset(&args, 0, sizeof(args)); 85830f712c9SDave Chinner args.tp = tp; 85930f712c9SDave Chinner args.mp = ip->i_mount; 860340785ccSDarrick J. Wong xfs_rmap_ino_owner(&args.oinfo, ip->i_ino, whichfork, 0); 86130f712c9SDave Chinner /* 86230f712c9SDave Chinner * Allocate a block. We know we need only one, since the 86330f712c9SDave Chinner * file currently fits in an inode. 86430f712c9SDave Chinner */ 865280253d2SBrian Foster if (tp->t_firstblock == NULLFSBLOCK) { 86630f712c9SDave Chinner args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); 86730f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 86830f712c9SDave Chinner } else { 869280253d2SBrian Foster args.fsbno = tp->t_firstblock; 87030f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 87130f712c9SDave Chinner } 87230f712c9SDave Chinner args.total = total; 87330f712c9SDave Chinner args.minlen = args.maxlen = args.prod = 1; 87430f712c9SDave Chinner error = xfs_alloc_vextent(&args); 87530f712c9SDave Chinner if (error) 87630f712c9SDave Chinner goto done; 87730f712c9SDave Chinner 87830f712c9SDave Chinner /* Can't fail, the space was reserved. */ 87930f712c9SDave Chinner ASSERT(args.fsbno != NULLFSBLOCK); 88030f712c9SDave Chinner ASSERT(args.len == 1); 881280253d2SBrian Foster tp->t_firstblock = args.fsbno; 882ee647f85SDarrick J. Wong error = xfs_trans_get_buf(tp, args.mp->m_ddev_targp, 883ee647f85SDarrick J. Wong XFS_FSB_TO_DADDR(args.mp, args.fsbno), 884ee647f85SDarrick J. Wong args.mp->m_bsize, 0, &bp); 885ee647f85SDarrick J. Wong if (error) 886ee647f85SDarrick J. Wong goto done; 88730f712c9SDave Chinner 888fe22d552SDave Chinner /* 889b7cdc66bSBrian Foster * Initialize the block, copy the data and log the remote buffer. 890fe22d552SDave Chinner * 891b7cdc66bSBrian Foster * The callout is responsible for logging because the remote format 892b7cdc66bSBrian Foster * might differ from the local format and thus we don't know how much to 893b7cdc66bSBrian Foster * log here. Note that init_fn must also set the buffer log item type 894b7cdc66bSBrian Foster * correctly. 895fe22d552SDave Chinner */ 89630f712c9SDave Chinner init_fn(tp, bp, ip, ifp); 89730f712c9SDave Chinner 898b7cdc66bSBrian Foster /* account for the change in fork size */ 89930f712c9SDave Chinner xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); 900aeea4b75SBrian Foster xfs_bmap_local_to_extents_empty(tp, ip, whichfork); 90130f712c9SDave Chinner flags |= XFS_ILOG_CORE; 90230f712c9SDave Chinner 9036bdcf26aSChristoph Hellwig ifp->if_u1.if_root = NULL; 9046bdcf26aSChristoph Hellwig ifp->if_height = 0; 9056bdcf26aSChristoph Hellwig 90650bb44c2SChristoph Hellwig rec.br_startoff = 0; 90750bb44c2SChristoph Hellwig rec.br_startblock = args.fsbno; 90850bb44c2SChristoph Hellwig rec.br_blockcount = 1; 90950bb44c2SChristoph Hellwig rec.br_state = XFS_EXT_NORM; 910b2b1712aSChristoph Hellwig xfs_iext_first(ifp, &icur); 9110254c2f2SChristoph Hellwig xfs_iext_insert(ip, &icur, &rec, 0); 91250bb44c2SChristoph Hellwig 913daf83964SChristoph Hellwig ifp->if_nextents = 1; 9146e73a545SChristoph Hellwig ip->i_nblocks = 1; 91530f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, 91630f712c9SDave Chinner XFS_TRANS_DQ_BCOUNT, 1L); 91730f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 91830f712c9SDave Chinner 91930f712c9SDave Chinner done: 92030f712c9SDave Chinner *logflagsp = flags; 92130f712c9SDave Chinner return error; 92230f712c9SDave Chinner } 92330f712c9SDave Chinner 92430f712c9SDave Chinner /* 92530f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle btree format files. 92630f712c9SDave Chinner */ 92730f712c9SDave Chinner STATIC int /* error */ 92830f712c9SDave Chinner xfs_bmap_add_attrfork_btree( 92930f712c9SDave Chinner xfs_trans_t *tp, /* transaction pointer */ 93030f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 93130f712c9SDave Chinner int *flags) /* inode logging flags */ 93230f712c9SDave Chinner { 933b6785e27SChandan Babu R struct xfs_btree_block *block = ip->i_df.if_broot; 93430f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 93530f712c9SDave Chinner int error; /* error return value */ 93630f712c9SDave Chinner xfs_mount_t *mp; /* file system mount struct */ 93730f712c9SDave Chinner int stat; /* newroot status */ 93830f712c9SDave Chinner 93930f712c9SDave Chinner mp = ip->i_mount; 940b6785e27SChandan Babu R 941b6785e27SChandan Babu R if (XFS_BMAP_BMDR_SPACE(block) <= XFS_IFORK_DSIZE(ip)) 94230f712c9SDave Chinner *flags |= XFS_ILOG_DBROOT; 94330f712c9SDave Chinner else { 94430f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); 945b5cfbc22SChristoph Hellwig error = xfs_bmbt_lookup_first(cur, &stat); 946b5cfbc22SChristoph Hellwig if (error) 94730f712c9SDave Chinner goto error0; 94830f712c9SDave Chinner /* must be at least one entry */ 949f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, stat != 1)) { 950f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 951f9e03706SDarrick J. Wong goto error0; 952f9e03706SDarrick J. Wong } 95330f712c9SDave Chinner if ((error = xfs_btree_new_iroot(cur, flags, &stat))) 95430f712c9SDave Chinner goto error0; 95530f712c9SDave Chinner if (stat == 0) { 95630f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 9572451337dSDave Chinner return -ENOSPC; 95830f712c9SDave Chinner } 95992219c29SDave Chinner cur->bc_ino.allocated = 0; 96030f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); 96130f712c9SDave Chinner } 96230f712c9SDave Chinner return 0; 96330f712c9SDave Chinner error0: 96430f712c9SDave Chinner xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); 96530f712c9SDave Chinner return error; 96630f712c9SDave Chinner } 96730f712c9SDave Chinner 96830f712c9SDave Chinner /* 96930f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle extents format files. 97030f712c9SDave Chinner */ 97130f712c9SDave Chinner STATIC int /* error */ 97230f712c9SDave Chinner xfs_bmap_add_attrfork_extents( 97381ba8f3eSBrian Foster struct xfs_trans *tp, /* transaction pointer */ 97481ba8f3eSBrian Foster struct xfs_inode *ip, /* incore inode pointer */ 97530f712c9SDave Chinner int *flags) /* inode logging flags */ 97630f712c9SDave Chinner { 97730f712c9SDave Chinner xfs_btree_cur_t *cur; /* bmap btree cursor */ 97830f712c9SDave Chinner int error; /* error return value */ 97930f712c9SDave Chinner 980daf83964SChristoph Hellwig if (ip->i_df.if_nextents * sizeof(struct xfs_bmbt_rec) <= 981daf83964SChristoph Hellwig XFS_IFORK_DSIZE(ip)) 98230f712c9SDave Chinner return 0; 98330f712c9SDave Chinner cur = NULL; 984280253d2SBrian Foster error = xfs_bmap_extents_to_btree(tp, ip, &cur, 0, flags, 985280253d2SBrian Foster XFS_DATA_FORK); 98630f712c9SDave Chinner if (cur) { 98792219c29SDave Chinner cur->bc_ino.allocated = 0; 9880b04b6b8SDarrick J. Wong xfs_btree_del_cursor(cur, error); 98930f712c9SDave Chinner } 99030f712c9SDave Chinner return error; 99130f712c9SDave Chinner } 99230f712c9SDave Chinner 99330f712c9SDave Chinner /* 99430f712c9SDave Chinner * Called from xfs_bmap_add_attrfork to handle local format files. Each 99530f712c9SDave Chinner * different data fork content type needs a different callout to do the 99630f712c9SDave Chinner * conversion. Some are basic and only require special block initialisation 99730f712c9SDave Chinner * callouts for the data formating, others (directories) are so specialised they 99830f712c9SDave Chinner * handle everything themselves. 99930f712c9SDave Chinner * 100030f712c9SDave Chinner * XXX (dgc): investigate whether directory conversion can use the generic 100130f712c9SDave Chinner * formatting callout. It should be possible - it's just a very complex 100230f712c9SDave Chinner * formatter. 100330f712c9SDave Chinner */ 100430f712c9SDave Chinner STATIC int /* error */ 100530f712c9SDave Chinner xfs_bmap_add_attrfork_local( 1006825d75cdSBrian Foster struct xfs_trans *tp, /* transaction pointer */ 1007825d75cdSBrian Foster struct xfs_inode *ip, /* incore inode pointer */ 100830f712c9SDave Chinner int *flags) /* inode logging flags */ 100930f712c9SDave Chinner { 1010825d75cdSBrian Foster struct xfs_da_args dargs; /* args for dir/attr code */ 101130f712c9SDave Chinner 101230f712c9SDave Chinner if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) 101330f712c9SDave Chinner return 0; 101430f712c9SDave Chinner 1015c19b3b05SDave Chinner if (S_ISDIR(VFS_I(ip)->i_mode)) { 101630f712c9SDave Chinner memset(&dargs, 0, sizeof(dargs)); 101730f712c9SDave Chinner dargs.geo = ip->i_mount->m_dir_geo; 101830f712c9SDave Chinner dargs.dp = ip; 101930f712c9SDave Chinner dargs.total = dargs.geo->fsbcount; 102030f712c9SDave Chinner dargs.whichfork = XFS_DATA_FORK; 102130f712c9SDave Chinner dargs.trans = tp; 102230f712c9SDave Chinner return xfs_dir2_sf_to_block(&dargs); 102330f712c9SDave Chinner } 102430f712c9SDave Chinner 1025c19b3b05SDave Chinner if (S_ISLNK(VFS_I(ip)->i_mode)) 1026280253d2SBrian Foster return xfs_bmap_local_to_extents(tp, ip, 1, flags, 1027280253d2SBrian Foster XFS_DATA_FORK, 102830f712c9SDave Chinner xfs_symlink_local_to_remote); 102930f712c9SDave Chinner 103030f712c9SDave Chinner /* should only be called for types that support local format data */ 103130f712c9SDave Chinner ASSERT(0); 10322451337dSDave Chinner return -EFSCORRUPTED; 103330f712c9SDave Chinner } 103430f712c9SDave Chinner 1035e6a688c3SDave Chinner /* 1036e6a688c3SDave Chinner * Set an inode attr fork offset based on the format of the data fork. 1037e6a688c3SDave Chinner */ 10382f3cd809SAllison Henderson int 10392f3cd809SAllison Henderson xfs_bmap_set_attrforkoff( 10402f3cd809SAllison Henderson struct xfs_inode *ip, 10412f3cd809SAllison Henderson int size, 10422f3cd809SAllison Henderson int *version) 10432f3cd809SAllison Henderson { 1044*683ec9baSDave Chinner int default_size = xfs_default_attroffset(ip) >> 3; 1045*683ec9baSDave Chinner 1046f7e67b20SChristoph Hellwig switch (ip->i_df.if_format) { 10472f3cd809SAllison Henderson case XFS_DINODE_FMT_DEV: 1048*683ec9baSDave Chinner ip->i_forkoff = default_size; 10492f3cd809SAllison Henderson break; 10502f3cd809SAllison Henderson case XFS_DINODE_FMT_LOCAL: 10512f3cd809SAllison Henderson case XFS_DINODE_FMT_EXTENTS: 10522f3cd809SAllison Henderson case XFS_DINODE_FMT_BTREE: 10537821ea30SChristoph Hellwig ip->i_forkoff = xfs_attr_shortform_bytesfit(ip, size); 10547821ea30SChristoph Hellwig if (!ip->i_forkoff) 1055*683ec9baSDave Chinner ip->i_forkoff = default_size; 10562f3cd809SAllison Henderson else if ((ip->i_mount->m_flags & XFS_MOUNT_ATTR2) && version) 10572f3cd809SAllison Henderson *version = 2; 10582f3cd809SAllison Henderson break; 10592f3cd809SAllison Henderson default: 10602f3cd809SAllison Henderson ASSERT(0); 10612f3cd809SAllison Henderson return -EINVAL; 10622f3cd809SAllison Henderson } 10632f3cd809SAllison Henderson 10642f3cd809SAllison Henderson return 0; 10652f3cd809SAllison Henderson } 10662f3cd809SAllison Henderson 106730f712c9SDave Chinner /* 106830f712c9SDave Chinner * Convert inode from non-attributed to attributed. 106930f712c9SDave Chinner * Must not be in a transaction, ip must not be locked. 107030f712c9SDave Chinner */ 107130f712c9SDave Chinner int /* error code */ 107230f712c9SDave Chinner xfs_bmap_add_attrfork( 107330f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 107430f712c9SDave Chinner int size, /* space new attribute needs */ 107530f712c9SDave Chinner int rsvd) /* xact may use reserved blks */ 107630f712c9SDave Chinner { 107730f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 107830f712c9SDave Chinner xfs_trans_t *tp; /* transaction pointer */ 107930f712c9SDave Chinner int blks; /* space reservation */ 108030f712c9SDave Chinner int version = 1; /* superblock attr version */ 108130f712c9SDave Chinner int logflags; /* logging flags */ 108230f712c9SDave Chinner int error; /* error return value */ 108330f712c9SDave Chinner 108430f712c9SDave Chinner ASSERT(XFS_IFORK_Q(ip) == 0); 108530f712c9SDave Chinner 108630f712c9SDave Chinner mp = ip->i_mount; 108730f712c9SDave Chinner ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); 1088253f4911SChristoph Hellwig 108930f712c9SDave Chinner blks = XFS_ADDAFORK_SPACE_RES(mp); 1090253f4911SChristoph Hellwig 10913de4eb10SDarrick J. Wong error = xfs_trans_alloc_inode(ip, &M_RES(mp)->tr_addafork, blks, 0, 10923a1af6c3SDarrick J. Wong rsvd, &tp); 1093253f4911SChristoph Hellwig if (error) 109430f712c9SDave Chinner return error; 109530f712c9SDave Chinner if (XFS_IFORK_Q(ip)) 109630f712c9SDave Chinner goto trans_cancel; 109730f712c9SDave Chinner 109830f712c9SDave Chinner xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 10992f3cd809SAllison Henderson error = xfs_bmap_set_attrforkoff(ip, size, &version); 11002f3cd809SAllison Henderson if (error) 110130f712c9SDave Chinner goto trans_cancel; 110230f712c9SDave Chinner ASSERT(ip->i_afp == NULL); 110332a2b11fSCarlos Maiolino 1104e6a688c3SDave Chinner ip->i_afp = xfs_ifork_alloc(XFS_DINODE_FMT_EXTENTS, 0); 110530f712c9SDave Chinner ip->i_afp->if_flags = XFS_IFEXTENTS; 110630f712c9SDave Chinner logflags = 0; 1107f7e67b20SChristoph Hellwig switch (ip->i_df.if_format) { 110830f712c9SDave Chinner case XFS_DINODE_FMT_LOCAL: 1109825d75cdSBrian Foster error = xfs_bmap_add_attrfork_local(tp, ip, &logflags); 111030f712c9SDave Chinner break; 111130f712c9SDave Chinner case XFS_DINODE_FMT_EXTENTS: 1112825d75cdSBrian Foster error = xfs_bmap_add_attrfork_extents(tp, ip, &logflags); 111330f712c9SDave Chinner break; 111430f712c9SDave Chinner case XFS_DINODE_FMT_BTREE: 1115825d75cdSBrian Foster error = xfs_bmap_add_attrfork_btree(tp, ip, &logflags); 111630f712c9SDave Chinner break; 111730f712c9SDave Chinner default: 111830f712c9SDave Chinner error = 0; 111930f712c9SDave Chinner break; 112030f712c9SDave Chinner } 112130f712c9SDave Chinner if (logflags) 112230f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 112330f712c9SDave Chinner if (error) 1124c8eac49eSBrian Foster goto trans_cancel; 112530f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb) || 112630f712c9SDave Chinner (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { 112761e63ecbSDave Chinner bool log_sb = false; 112830f712c9SDave Chinner 112930f712c9SDave Chinner spin_lock(&mp->m_sb_lock); 113030f712c9SDave Chinner if (!xfs_sb_version_hasattr(&mp->m_sb)) { 113130f712c9SDave Chinner xfs_sb_version_addattr(&mp->m_sb); 113261e63ecbSDave Chinner log_sb = true; 113330f712c9SDave Chinner } 113430f712c9SDave Chinner if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { 113530f712c9SDave Chinner xfs_sb_version_addattr2(&mp->m_sb); 113661e63ecbSDave Chinner log_sb = true; 113730f712c9SDave Chinner } 113830f712c9SDave Chinner spin_unlock(&mp->m_sb_lock); 113961e63ecbSDave Chinner if (log_sb) 114061e63ecbSDave Chinner xfs_log_sb(tp); 114130f712c9SDave Chinner } 114230f712c9SDave Chinner 114370393313SChristoph Hellwig error = xfs_trans_commit(tp); 114430f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 114530f712c9SDave Chinner return error; 114630f712c9SDave Chinner 114730f712c9SDave Chinner trans_cancel: 11484906e215SChristoph Hellwig xfs_trans_cancel(tp); 114930f712c9SDave Chinner xfs_iunlock(ip, XFS_ILOCK_EXCL); 115030f712c9SDave Chinner return error; 115130f712c9SDave Chinner } 115230f712c9SDave Chinner 115330f712c9SDave Chinner /* 115430f712c9SDave Chinner * Internal and external extent tree search functions. 115530f712c9SDave Chinner */ 115630f712c9SDave Chinner 1157e992ae8aSDarrick J. Wong struct xfs_iread_state { 1158e992ae8aSDarrick J. Wong struct xfs_iext_cursor icur; 1159e992ae8aSDarrick J. Wong xfs_extnum_t loaded; 1160e992ae8aSDarrick J. Wong }; 1161e992ae8aSDarrick J. Wong 1162e992ae8aSDarrick J. Wong /* Stuff every bmbt record from this block into the incore extent map. */ 1163e992ae8aSDarrick J. Wong static int 1164e992ae8aSDarrick J. Wong xfs_iread_bmbt_block( 1165e992ae8aSDarrick J. Wong struct xfs_btree_cur *cur, 1166e992ae8aSDarrick J. Wong int level, 1167e992ae8aSDarrick J. Wong void *priv) 1168e992ae8aSDarrick J. Wong { 1169e992ae8aSDarrick J. Wong struct xfs_iread_state *ir = priv; 1170e992ae8aSDarrick J. Wong struct xfs_mount *mp = cur->bc_mp; 117192219c29SDave Chinner struct xfs_inode *ip = cur->bc_ino.ip; 1172e992ae8aSDarrick J. Wong struct xfs_btree_block *block; 1173e992ae8aSDarrick J. Wong struct xfs_buf *bp; 1174e992ae8aSDarrick J. Wong struct xfs_bmbt_rec *frp; 1175e992ae8aSDarrick J. Wong xfs_extnum_t num_recs; 1176e992ae8aSDarrick J. Wong xfs_extnum_t j; 117792219c29SDave Chinner int whichfork = cur->bc_ino.whichfork; 1178daf83964SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 1179e992ae8aSDarrick J. Wong 1180e992ae8aSDarrick J. Wong block = xfs_btree_get_block(cur, level, &bp); 1181e992ae8aSDarrick J. Wong 1182e992ae8aSDarrick J. Wong /* Abort if we find more records than nextents. */ 1183e992ae8aSDarrick J. Wong num_recs = xfs_btree_get_numrecs(block); 1184daf83964SChristoph Hellwig if (unlikely(ir->loaded + num_recs > ifp->if_nextents)) { 1185e992ae8aSDarrick J. Wong xfs_warn(ip->i_mount, "corrupt dinode %llu, (btree extents).", 1186e992ae8aSDarrick J. Wong (unsigned long long)ip->i_ino); 1187e992ae8aSDarrick J. Wong xfs_inode_verifier_error(ip, -EFSCORRUPTED, __func__, block, 1188e992ae8aSDarrick J. Wong sizeof(*block), __this_address); 1189e992ae8aSDarrick J. Wong return -EFSCORRUPTED; 1190e992ae8aSDarrick J. Wong } 1191e992ae8aSDarrick J. Wong 1192e992ae8aSDarrick J. Wong /* Copy records into the incore cache. */ 1193e992ae8aSDarrick J. Wong frp = XFS_BMBT_REC_ADDR(mp, block, 1); 1194e992ae8aSDarrick J. Wong for (j = 0; j < num_recs; j++, frp++, ir->loaded++) { 1195e992ae8aSDarrick J. Wong struct xfs_bmbt_irec new; 1196e992ae8aSDarrick J. Wong xfs_failaddr_t fa; 1197e992ae8aSDarrick J. Wong 1198e992ae8aSDarrick J. Wong xfs_bmbt_disk_get_all(frp, &new); 1199e992ae8aSDarrick J. Wong fa = xfs_bmap_validate_extent(ip, whichfork, &new); 1200e992ae8aSDarrick J. Wong if (fa) { 1201e992ae8aSDarrick J. Wong xfs_inode_verifier_error(ip, -EFSCORRUPTED, 1202e992ae8aSDarrick J. Wong "xfs_iread_extents(2)", frp, 1203e992ae8aSDarrick J. Wong sizeof(*frp), fa); 1204e992ae8aSDarrick J. Wong return -EFSCORRUPTED; 1205e992ae8aSDarrick J. Wong } 1206e992ae8aSDarrick J. Wong xfs_iext_insert(ip, &ir->icur, &new, 1207e992ae8aSDarrick J. Wong xfs_bmap_fork_to_state(whichfork)); 1208e992ae8aSDarrick J. Wong trace_xfs_read_extent(ip, &ir->icur, 1209e992ae8aSDarrick J. Wong xfs_bmap_fork_to_state(whichfork), _THIS_IP_); 1210daf83964SChristoph Hellwig xfs_iext_next(ifp, &ir->icur); 1211e992ae8aSDarrick J. Wong } 1212e992ae8aSDarrick J. Wong 1213e992ae8aSDarrick J. Wong return 0; 1214e992ae8aSDarrick J. Wong } 1215e992ae8aSDarrick J. Wong 121630f712c9SDave Chinner /* 1217211e95bbSChristoph Hellwig * Read in extents from a btree-format inode. 121830f712c9SDave Chinner */ 1219211e95bbSChristoph Hellwig int 1220211e95bbSChristoph Hellwig xfs_iread_extents( 1221211e95bbSChristoph Hellwig struct xfs_trans *tp, 1222211e95bbSChristoph Hellwig struct xfs_inode *ip, 1223211e95bbSChristoph Hellwig int whichfork) 122430f712c9SDave Chinner { 1225e992ae8aSDarrick J. Wong struct xfs_iread_state ir; 1226211e95bbSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 1227e992ae8aSDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 1228e992ae8aSDarrick J. Wong struct xfs_btree_cur *cur; 1229211e95bbSChristoph Hellwig int error; 123030f712c9SDave Chinner 1231211e95bbSChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 1232211e95bbSChristoph Hellwig 1233f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, ifp->if_format != XFS_DINODE_FMT_BTREE)) { 1234e992ae8aSDarrick J. Wong error = -EFSCORRUPTED; 1235e992ae8aSDarrick J. Wong goto out; 1236211e95bbSChristoph Hellwig } 1237211e95bbSChristoph Hellwig 1238e992ae8aSDarrick J. Wong ir.loaded = 0; 1239e992ae8aSDarrick J. Wong xfs_iext_first(ifp, &ir.icur); 1240e992ae8aSDarrick J. Wong cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 1241e992ae8aSDarrick J. Wong error = xfs_btree_visit_blocks(cur, xfs_iread_bmbt_block, 1242e992ae8aSDarrick J. Wong XFS_BTREE_VISIT_RECORDS, &ir); 1243e992ae8aSDarrick J. Wong xfs_btree_del_cursor(cur, error); 1244e992ae8aSDarrick J. Wong if (error) 1245e992ae8aSDarrick J. Wong goto out; 1246e992ae8aSDarrick J. Wong 1247daf83964SChristoph Hellwig if (XFS_IS_CORRUPT(mp, ir.loaded != ifp->if_nextents)) { 1248211e95bbSChristoph Hellwig error = -EFSCORRUPTED; 1249211e95bbSChristoph Hellwig goto out; 1250211e95bbSChristoph Hellwig } 1251e992ae8aSDarrick J. Wong ASSERT(ir.loaded == xfs_iext_count(ifp)); 1252211e95bbSChristoph Hellwig 1253211e95bbSChristoph Hellwig ifp->if_flags |= XFS_IFEXTENTS; 125430f712c9SDave Chinner return 0; 1255211e95bbSChristoph Hellwig out: 1256211e95bbSChristoph Hellwig xfs_iext_destroy(ifp); 1257211e95bbSChristoph Hellwig return error; 125830f712c9SDave Chinner } 125930f712c9SDave Chinner 126030f712c9SDave Chinner /* 126129b3e94aSChristoph Hellwig * Returns the relative block number of the first unused block(s) in the given 126229b3e94aSChristoph Hellwig * fork with at least "len" logically contiguous blocks free. This is the 126329b3e94aSChristoph Hellwig * lowest-address hole if the fork has holes, else the first block past the end 126429b3e94aSChristoph Hellwig * of fork. Return 0 if the fork is currently local (in-inode). 126530f712c9SDave Chinner */ 126630f712c9SDave Chinner int /* error */ 126730f712c9SDave Chinner xfs_bmap_first_unused( 126829b3e94aSChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 126929b3e94aSChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 127030f712c9SDave Chinner xfs_extlen_t len, /* size of hole to find */ 127130f712c9SDave Chinner xfs_fileoff_t *first_unused, /* unused block */ 127230f712c9SDave Chinner int whichfork) /* data or attr fork */ 127330f712c9SDave Chinner { 127429b3e94aSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 127529b3e94aSChristoph Hellwig struct xfs_bmbt_irec got; 1276b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 127729b3e94aSChristoph Hellwig xfs_fileoff_t lastaddr = 0; 127829b3e94aSChristoph Hellwig xfs_fileoff_t lowest, max; 127929b3e94aSChristoph Hellwig int error; 128030f712c9SDave Chinner 1281f7e67b20SChristoph Hellwig if (ifp->if_format == XFS_DINODE_FMT_LOCAL) { 128230f712c9SDave Chinner *first_unused = 0; 128330f712c9SDave Chinner return 0; 128430f712c9SDave Chinner } 128529b3e94aSChristoph Hellwig 1286f7e67b20SChristoph Hellwig ASSERT(xfs_ifork_has_extents(ifp)); 1287f7e67b20SChristoph Hellwig 128829b3e94aSChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 128929b3e94aSChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 129029b3e94aSChristoph Hellwig if (error) 129130f712c9SDave Chinner return error; 129229b3e94aSChristoph Hellwig } 1293f2285c14SChristoph Hellwig 129429b3e94aSChristoph Hellwig lowest = max = *first_unused; 1295b2b1712aSChristoph Hellwig for_each_xfs_iext(ifp, &icur, &got) { 129630f712c9SDave Chinner /* 129730f712c9SDave Chinner * See if the hole before this extent will work. 129830f712c9SDave Chinner */ 1299f2285c14SChristoph Hellwig if (got.br_startoff >= lowest + len && 130029b3e94aSChristoph Hellwig got.br_startoff - max >= len) 130129b3e94aSChristoph Hellwig break; 1302f2285c14SChristoph Hellwig lastaddr = got.br_startoff + got.br_blockcount; 130330f712c9SDave Chinner max = XFS_FILEOFF_MAX(lastaddr, lowest); 130430f712c9SDave Chinner } 130529b3e94aSChristoph Hellwig 130630f712c9SDave Chinner *first_unused = max; 130730f712c9SDave Chinner return 0; 130830f712c9SDave Chinner } 130930f712c9SDave Chinner 131030f712c9SDave Chinner /* 131130f712c9SDave Chinner * Returns the file-relative block number of the last block - 1 before 131230f712c9SDave Chinner * last_block (input value) in the file. 131330f712c9SDave Chinner * This is not based on i_size, it is based on the extent records. 131430f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 131530f712c9SDave Chinner */ 131630f712c9SDave Chinner int /* error */ 131730f712c9SDave Chinner xfs_bmap_last_before( 131886685f7bSChristoph Hellwig struct xfs_trans *tp, /* transaction pointer */ 131986685f7bSChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 132030f712c9SDave Chinner xfs_fileoff_t *last_block, /* last block */ 132130f712c9SDave Chinner int whichfork) /* data or attr fork */ 132230f712c9SDave Chinner { 132386685f7bSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 132486685f7bSChristoph Hellwig struct xfs_bmbt_irec got; 1325b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 132686685f7bSChristoph Hellwig int error; 132730f712c9SDave Chinner 1328f7e67b20SChristoph Hellwig switch (ifp->if_format) { 132986685f7bSChristoph Hellwig case XFS_DINODE_FMT_LOCAL: 133030f712c9SDave Chinner *last_block = 0; 133130f712c9SDave Chinner return 0; 133286685f7bSChristoph Hellwig case XFS_DINODE_FMT_BTREE: 133386685f7bSChristoph Hellwig case XFS_DINODE_FMT_EXTENTS: 133486685f7bSChristoph Hellwig break; 133586685f7bSChristoph Hellwig default: 1336a5155b87SDarrick J. Wong ASSERT(0); 1337c2414ad6SDarrick J. Wong return -EFSCORRUPTED; 133830f712c9SDave Chinner } 133986685f7bSChristoph Hellwig 134086685f7bSChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 134186685f7bSChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 134286685f7bSChristoph Hellwig if (error) 134330f712c9SDave Chinner return error; 134430f712c9SDave Chinner } 134586685f7bSChristoph Hellwig 1346b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent_before(ip, ifp, last_block, &icur, &got)) 134786685f7bSChristoph Hellwig *last_block = 0; 134830f712c9SDave Chinner return 0; 134930f712c9SDave Chinner } 135030f712c9SDave Chinner 135130f712c9SDave Chinner int 135230f712c9SDave Chinner xfs_bmap_last_extent( 135330f712c9SDave Chinner struct xfs_trans *tp, 135430f712c9SDave Chinner struct xfs_inode *ip, 135530f712c9SDave Chinner int whichfork, 135630f712c9SDave Chinner struct xfs_bmbt_irec *rec, 135730f712c9SDave Chinner int *is_empty) 135830f712c9SDave Chinner { 135930f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 1360b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 136130f712c9SDave Chinner int error; 136230f712c9SDave Chinner 136330f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 136430f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 136530f712c9SDave Chinner if (error) 136630f712c9SDave Chinner return error; 136730f712c9SDave Chinner } 136830f712c9SDave Chinner 1369b2b1712aSChristoph Hellwig xfs_iext_last(ifp, &icur); 1370b2b1712aSChristoph Hellwig if (!xfs_iext_get_extent(ifp, &icur, rec)) 137130f712c9SDave Chinner *is_empty = 1; 1372b2b1712aSChristoph Hellwig else 137330f712c9SDave Chinner *is_empty = 0; 137430f712c9SDave Chinner return 0; 137530f712c9SDave Chinner } 137630f712c9SDave Chinner 137730f712c9SDave Chinner /* 137830f712c9SDave Chinner * Check the last inode extent to determine whether this allocation will result 137930f712c9SDave Chinner * in blocks being allocated at the end of the file. When we allocate new data 138030f712c9SDave Chinner * blocks at the end of the file which do not start at the previous data block, 138130f712c9SDave Chinner * we will try to align the new blocks at stripe unit boundaries. 138230f712c9SDave Chinner * 138330f712c9SDave Chinner * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be 138430f712c9SDave Chinner * at, or past the EOF. 138530f712c9SDave Chinner */ 138630f712c9SDave Chinner STATIC int 138730f712c9SDave Chinner xfs_bmap_isaeof( 138830f712c9SDave Chinner struct xfs_bmalloca *bma, 138930f712c9SDave Chinner int whichfork) 139030f712c9SDave Chinner { 139130f712c9SDave Chinner struct xfs_bmbt_irec rec; 139230f712c9SDave Chinner int is_empty; 139330f712c9SDave Chinner int error; 139430f712c9SDave Chinner 1395749f24f3SThomas Meyer bma->aeof = false; 139630f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, 139730f712c9SDave Chinner &is_empty); 139830f712c9SDave Chinner if (error) 139930f712c9SDave Chinner return error; 140030f712c9SDave Chinner 140130f712c9SDave Chinner if (is_empty) { 1402749f24f3SThomas Meyer bma->aeof = true; 140330f712c9SDave Chinner return 0; 140430f712c9SDave Chinner } 140530f712c9SDave Chinner 140630f712c9SDave Chinner /* 140730f712c9SDave Chinner * Check if we are allocation or past the last extent, or at least into 140830f712c9SDave Chinner * the last delayed allocated extent. 140930f712c9SDave Chinner */ 141030f712c9SDave Chinner bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || 141130f712c9SDave Chinner (bma->offset >= rec.br_startoff && 141230f712c9SDave Chinner isnullstartblock(rec.br_startblock)); 141330f712c9SDave Chinner return 0; 141430f712c9SDave Chinner } 141530f712c9SDave Chinner 141630f712c9SDave Chinner /* 141730f712c9SDave Chinner * Returns the file-relative block number of the first block past eof in 141830f712c9SDave Chinner * the file. This is not based on i_size, it is based on the extent records. 141930f712c9SDave Chinner * Returns 0 for local files, as they do not have extent records. 142030f712c9SDave Chinner */ 142130f712c9SDave Chinner int 142230f712c9SDave Chinner xfs_bmap_last_offset( 142330f712c9SDave Chinner struct xfs_inode *ip, 142430f712c9SDave Chinner xfs_fileoff_t *last_block, 142530f712c9SDave Chinner int whichfork) 142630f712c9SDave Chinner { 1427f7e67b20SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 142830f712c9SDave Chinner struct xfs_bmbt_irec rec; 142930f712c9SDave Chinner int is_empty; 143030f712c9SDave Chinner int error; 143130f712c9SDave Chinner 143230f712c9SDave Chinner *last_block = 0; 143330f712c9SDave Chinner 1434f7e67b20SChristoph Hellwig if (ifp->if_format == XFS_DINODE_FMT_LOCAL) 143530f712c9SDave Chinner return 0; 143630f712c9SDave Chinner 1437f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(ip->i_mount, !xfs_ifork_has_extents(ifp))) 1438c2414ad6SDarrick J. Wong return -EFSCORRUPTED; 143930f712c9SDave Chinner 144030f712c9SDave Chinner error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); 144130f712c9SDave Chinner if (error || is_empty) 144230f712c9SDave Chinner return error; 144330f712c9SDave Chinner 144430f712c9SDave Chinner *last_block = rec.br_startoff + rec.br_blockcount; 144530f712c9SDave Chinner return 0; 144630f712c9SDave Chinner } 144730f712c9SDave Chinner 144830f712c9SDave Chinner /* 144930f712c9SDave Chinner * Returns whether the selected fork of the inode has exactly one 145013d2c10bSChristoph Hellwig * block or not. For the data fork we check this matches i_disk_size, 145130f712c9SDave Chinner * implying the file's range is 0..bsize-1. 145230f712c9SDave Chinner */ 145330f712c9SDave Chinner int /* 1=>1 block, 0=>otherwise */ 145430f712c9SDave Chinner xfs_bmap_one_block( 1455daf83964SChristoph Hellwig struct xfs_inode *ip, /* incore inode */ 145630f712c9SDave Chinner int whichfork) /* data or attr fork */ 145730f712c9SDave Chinner { 1458daf83964SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 145930f712c9SDave Chinner int rval; /* return value */ 1460daf83964SChristoph Hellwig struct xfs_bmbt_irec s; /* internal version of extent */ 1461b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 146230f712c9SDave Chinner 146330f712c9SDave Chinner #ifndef DEBUG 146430f712c9SDave Chinner if (whichfork == XFS_DATA_FORK) 146530f712c9SDave Chinner return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; 146630f712c9SDave Chinner #endif /* !DEBUG */ 1467daf83964SChristoph Hellwig if (ifp->if_nextents != 1) 146830f712c9SDave Chinner return 0; 1469f7e67b20SChristoph Hellwig if (ifp->if_format != XFS_DINODE_FMT_EXTENTS) 147030f712c9SDave Chinner return 0; 147130f712c9SDave Chinner ASSERT(ifp->if_flags & XFS_IFEXTENTS); 1472b2b1712aSChristoph Hellwig xfs_iext_first(ifp, &icur); 1473b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &icur, &s); 147430f712c9SDave Chinner rval = s.br_startoff == 0 && s.br_blockcount == 1; 147530f712c9SDave Chinner if (rval && whichfork == XFS_DATA_FORK) 147630f712c9SDave Chinner ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); 147730f712c9SDave Chinner return rval; 147830f712c9SDave Chinner } 147930f712c9SDave Chinner 148030f712c9SDave Chinner /* 148130f712c9SDave Chinner * Extent tree manipulation functions used during allocation. 148230f712c9SDave Chinner */ 148330f712c9SDave Chinner 148430f712c9SDave Chinner /* 148530f712c9SDave Chinner * Convert a delayed allocation to a real allocation. 148630f712c9SDave Chinner */ 148730f712c9SDave Chinner STATIC int /* error */ 148830f712c9SDave Chinner xfs_bmap_add_extent_delay_real( 148960b4984fSDarrick J. Wong struct xfs_bmalloca *bma, 149060b4984fSDarrick J. Wong int whichfork) 149130f712c9SDave Chinner { 1492daf83964SChristoph Hellwig struct xfs_mount *mp = bma->ip->i_mount; 1493daf83964SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 149430f712c9SDave Chinner struct xfs_bmbt_irec *new = &bma->got; 149530f712c9SDave Chinner int error; /* error return value */ 149630f712c9SDave Chinner int i; /* temp state */ 149730f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 149830f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 149930f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 150030f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 1501060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 150230f712c9SDave Chinner xfs_filblks_t da_new; /* new count del alloc blocks used */ 150330f712c9SDave Chinner xfs_filblks_t da_old; /* old count del alloc blocks used */ 150430f712c9SDave Chinner xfs_filblks_t temp=0; /* value for da_new calculations */ 150530f712c9SDave Chinner int tmp_rval; /* partial logging flags */ 15064dcb8869SChristoph Hellwig struct xfs_bmbt_irec old; 150730f712c9SDave Chinner 150860b4984fSDarrick J. Wong ASSERT(whichfork != XFS_ATTR_FORK); 150930f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 151030f712c9SDave Chinner ASSERT(!bma->cur || 15118ef54797SDave Chinner (bma->cur->bc_ino.flags & XFS_BTCUR_BMBT_WASDEL)); 151230f712c9SDave Chinner 1513ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 151430f712c9SDave Chinner 151530f712c9SDave Chinner #define LEFT r[0] 151630f712c9SDave Chinner #define RIGHT r[1] 151730f712c9SDave Chinner #define PREV r[2] 151830f712c9SDave Chinner 151930f712c9SDave Chinner /* 152030f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 152130f712c9SDave Chinner */ 1522b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &bma->icur, &PREV); 152330f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 15244dcb8869SChristoph Hellwig ASSERT(isnullstartblock(PREV.br_startblock)); 152530f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 152630f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 152730f712c9SDave Chinner 152830f712c9SDave Chinner da_old = startblockval(PREV.br_startblock); 152930f712c9SDave Chinner da_new = 0; 153030f712c9SDave Chinner 153130f712c9SDave Chinner /* 153230f712c9SDave Chinner * Set flags determining what part of the previous delayed allocation 153330f712c9SDave Chinner * extent is being replaced by a real allocation. 153430f712c9SDave Chinner */ 153530f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 153630f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 153730f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 153830f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 153930f712c9SDave Chinner 154030f712c9SDave Chinner /* 154130f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 154230f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 154330f712c9SDave Chinner */ 1544b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, &bma->icur, &LEFT)) { 154530f712c9SDave Chinner state |= BMAP_LEFT_VALID; 154630f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 154730f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 154830f712c9SDave Chinner } 154930f712c9SDave Chinner 155030f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 155130f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 155230f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 155330f712c9SDave Chinner LEFT.br_state == new->br_state && 155430f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 155530f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 155630f712c9SDave Chinner 155730f712c9SDave Chinner /* 155830f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 155930f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 156030f712c9SDave Chinner * Also check for all-three-contiguous being too large. 156130f712c9SDave Chinner */ 1562b2b1712aSChristoph Hellwig if (xfs_iext_peek_next_extent(ifp, &bma->icur, &RIGHT)) { 156330f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 156430f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 156530f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 156630f712c9SDave Chinner } 156730f712c9SDave Chinner 156830f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 156930f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 157030f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 157130f712c9SDave Chinner new->br_state == RIGHT.br_state && 157230f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 157330f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 157430f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 157530f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 157630f712c9SDave Chinner BMAP_RIGHT_FILLING) || 157730f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 157830f712c9SDave Chinner <= MAXEXTLEN)) 157930f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 158030f712c9SDave Chinner 158130f712c9SDave Chinner error = 0; 158230f712c9SDave Chinner /* 158330f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 158430f712c9SDave Chinner */ 158530f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 158630f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 158730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 158830f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 158930f712c9SDave Chinner /* 159030f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 159130f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 159230f712c9SDave Chinner */ 15934dcb8869SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; 159430f712c9SDave Chinner 1595c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1596c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1597b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1598b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &LEFT); 1599daf83964SChristoph Hellwig ifp->if_nextents--; 16000d045540SChristoph Hellwig 160130f712c9SDave Chinner if (bma->cur == NULL) 160230f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 160330f712c9SDave Chinner else { 160430f712c9SDave Chinner rval = XFS_ILOG_CORE; 1605e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &RIGHT, &i); 160630f712c9SDave Chinner if (error) 160730f712c9SDave Chinner goto done; 1608f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1609f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1610f9e03706SDarrick J. Wong goto done; 1611f9e03706SDarrick J. Wong } 161230f712c9SDave Chinner error = xfs_btree_delete(bma->cur, &i); 161330f712c9SDave Chinner if (error) 161430f712c9SDave Chinner goto done; 1615f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1616f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1617f9e03706SDarrick J. Wong goto done; 1618f9e03706SDarrick J. Wong } 161930f712c9SDave Chinner error = xfs_btree_decrement(bma->cur, 0, &i); 162030f712c9SDave Chinner if (error) 162130f712c9SDave Chinner goto done; 1622f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1623f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1624f9e03706SDarrick J. Wong goto done; 1625f9e03706SDarrick J. Wong } 1626a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 162730f712c9SDave Chinner if (error) 162830f712c9SDave Chinner goto done; 162930f712c9SDave Chinner } 163030f712c9SDave Chinner break; 163130f712c9SDave Chinner 163230f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 163330f712c9SDave Chinner /* 163430f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 163530f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 163630f712c9SDave Chinner */ 16374dcb8869SChristoph Hellwig old = LEFT; 16384dcb8869SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount; 16390d045540SChristoph Hellwig 1640c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1641b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1642b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &LEFT); 164330f712c9SDave Chinner 164430f712c9SDave Chinner if (bma->cur == NULL) 164530f712c9SDave Chinner rval = XFS_ILOG_DEXT; 164630f712c9SDave Chinner else { 164730f712c9SDave Chinner rval = 0; 1648e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &old, &i); 164930f712c9SDave Chinner if (error) 165030f712c9SDave Chinner goto done; 1651f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1652f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1653f9e03706SDarrick J. Wong goto done; 1654f9e03706SDarrick J. Wong } 1655a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 165630f712c9SDave Chinner if (error) 165730f712c9SDave Chinner goto done; 165830f712c9SDave Chinner } 165930f712c9SDave Chinner break; 166030f712c9SDave Chinner 166130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 166230f712c9SDave Chinner /* 166330f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 16649230a0b6SDave Chinner * The right neighbor is contiguous, the left is not. Take care 16659230a0b6SDave Chinner * with delay -> unwritten extent allocation here because the 16669230a0b6SDave Chinner * delalloc record we are overwriting is always written. 166730f712c9SDave Chinner */ 16684dcb8869SChristoph Hellwig PREV.br_startblock = new->br_startblock; 16694dcb8869SChristoph Hellwig PREV.br_blockcount += RIGHT.br_blockcount; 16709230a0b6SDave Chinner PREV.br_state = new->br_state; 16710d045540SChristoph Hellwig 1672b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 1673c38ccf59SChristoph Hellwig xfs_iext_remove(bma->ip, &bma->icur, state); 1674b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1675b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 167630f712c9SDave Chinner 167730f712c9SDave Chinner if (bma->cur == NULL) 167830f712c9SDave Chinner rval = XFS_ILOG_DEXT; 167930f712c9SDave Chinner else { 168030f712c9SDave Chinner rval = 0; 1681e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &RIGHT, &i); 168230f712c9SDave Chinner if (error) 168330f712c9SDave Chinner goto done; 1684f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1685f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1686f9e03706SDarrick J. Wong goto done; 1687f9e03706SDarrick J. Wong } 1688a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &PREV); 168930f712c9SDave Chinner if (error) 169030f712c9SDave Chinner goto done; 169130f712c9SDave Chinner } 169230f712c9SDave Chinner break; 169330f712c9SDave Chinner 169430f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 169530f712c9SDave Chinner /* 169630f712c9SDave Chinner * Filling in all of a previously delayed allocation extent. 169730f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 169830f712c9SDave Chinner * the new one. 169930f712c9SDave Chinner */ 17004dcb8869SChristoph Hellwig PREV.br_startblock = new->br_startblock; 17014dcb8869SChristoph Hellwig PREV.br_state = new->br_state; 1702b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 1703daf83964SChristoph Hellwig ifp->if_nextents++; 170430f712c9SDave Chinner 170530f712c9SDave Chinner if (bma->cur == NULL) 170630f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 170730f712c9SDave Chinner else { 170830f712c9SDave Chinner rval = XFS_ILOG_CORE; 1709e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 171030f712c9SDave Chinner if (error) 171130f712c9SDave Chinner goto done; 1712f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 1713f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1714f9e03706SDarrick J. Wong goto done; 1715f9e03706SDarrick J. Wong } 171630f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 171730f712c9SDave Chinner if (error) 171830f712c9SDave Chinner goto done; 1719f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1720f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1721f9e03706SDarrick J. Wong goto done; 1722f9e03706SDarrick J. Wong } 172330f712c9SDave Chinner } 172430f712c9SDave Chinner break; 172530f712c9SDave Chinner 172630f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 172730f712c9SDave Chinner /* 172830f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 172930f712c9SDave Chinner * The left neighbor is contiguous. 173030f712c9SDave Chinner */ 17314dcb8869SChristoph Hellwig old = LEFT; 17324dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 17334dcb8869SChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 17344dcb8869SChristoph Hellwig startblockval(PREV.br_startblock)); 17354dcb8869SChristoph Hellwig 17364dcb8869SChristoph Hellwig LEFT.br_blockcount += new->br_blockcount; 173730f712c9SDave Chinner 1738bf99971cSChristoph Hellwig PREV.br_blockcount = temp; 17394dcb8869SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 17404dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 17410d045540SChristoph Hellwig 1742b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 1743b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 1744b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &LEFT); 17454dcb8869SChristoph Hellwig 174630f712c9SDave Chinner if (bma->cur == NULL) 174730f712c9SDave Chinner rval = XFS_ILOG_DEXT; 174830f712c9SDave Chinner else { 174930f712c9SDave Chinner rval = 0; 1750e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &old, &i); 175130f712c9SDave Chinner if (error) 175230f712c9SDave Chinner goto done; 1753f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1754f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1755f9e03706SDarrick J. Wong goto done; 1756f9e03706SDarrick J. Wong } 1757a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &LEFT); 175830f712c9SDave Chinner if (error) 175930f712c9SDave Chinner goto done; 176030f712c9SDave Chinner } 176130f712c9SDave Chinner break; 176230f712c9SDave Chinner 176330f712c9SDave Chinner case BMAP_LEFT_FILLING: 176430f712c9SDave Chinner /* 176530f712c9SDave Chinner * Filling in the first part of a previous delayed allocation. 176630f712c9SDave Chinner * The left neighbor is not contiguous. 176730f712c9SDave Chinner */ 1768b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, new); 1769daf83964SChristoph Hellwig ifp->if_nextents++; 1770daf83964SChristoph Hellwig 177130f712c9SDave Chinner if (bma->cur == NULL) 177230f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 177330f712c9SDave Chinner else { 177430f712c9SDave Chinner rval = XFS_ILOG_CORE; 1775e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 177630f712c9SDave Chinner if (error) 177730f712c9SDave Chinner goto done; 1778f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 1779f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1780f9e03706SDarrick J. Wong goto done; 1781f9e03706SDarrick J. Wong } 178230f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 178330f712c9SDave Chinner if (error) 178430f712c9SDave Chinner goto done; 1785f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1786f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1787f9e03706SDarrick J. Wong goto done; 1788f9e03706SDarrick J. Wong } 178930f712c9SDave Chinner } 179030f712c9SDave Chinner 17916d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 179230f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 1793280253d2SBrian Foster &bma->cur, 1, &tmp_rval, whichfork); 179430f712c9SDave Chinner rval |= tmp_rval; 179530f712c9SDave Chinner if (error) 179630f712c9SDave Chinner goto done; 179730f712c9SDave Chinner } 17984dcb8869SChristoph Hellwig 17994dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 180030f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 180130f712c9SDave Chinner startblockval(PREV.br_startblock) - 180292219c29SDave Chinner (bma->cur ? bma->cur->bc_ino.allocated : 0)); 18034dcb8869SChristoph Hellwig 18044dcb8869SChristoph Hellwig PREV.br_startoff = new_endoff; 18054dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 18064dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 1807b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 18080254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &PREV, state); 1809b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &bma->icur); 181030f712c9SDave Chinner break; 181130f712c9SDave Chinner 181230f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 181330f712c9SDave Chinner /* 181430f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 181530f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 181630f712c9SDave Chinner */ 18174dcb8869SChristoph Hellwig old = RIGHT; 18184dcb8869SChristoph Hellwig RIGHT.br_startoff = new->br_startoff; 18194dcb8869SChristoph Hellwig RIGHT.br_startblock = new->br_startblock; 18204dcb8869SChristoph Hellwig RIGHT.br_blockcount += new->br_blockcount; 18214dcb8869SChristoph Hellwig 182230f712c9SDave Chinner if (bma->cur == NULL) 182330f712c9SDave Chinner rval = XFS_ILOG_DEXT; 182430f712c9SDave Chinner else { 182530f712c9SDave Chinner rval = 0; 1826e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, &old, &i); 182730f712c9SDave Chinner if (error) 182830f712c9SDave Chinner goto done; 1829f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1830f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1831f9e03706SDarrick J. Wong goto done; 1832f9e03706SDarrick J. Wong } 1833a67d00a5SChristoph Hellwig error = xfs_bmbt_update(bma->cur, &RIGHT); 183430f712c9SDave Chinner if (error) 183530f712c9SDave Chinner goto done; 183630f712c9SDave Chinner } 183730f712c9SDave Chinner 18384dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 183930f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 184030f712c9SDave Chinner startblockval(PREV.br_startblock)); 18414dcb8869SChristoph Hellwig 18424dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 18434dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 184430f712c9SDave Chinner 1845b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 1846b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 1847b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &RIGHT); 184830f712c9SDave Chinner break; 184930f712c9SDave Chinner 185030f712c9SDave Chinner case BMAP_RIGHT_FILLING: 185130f712c9SDave Chinner /* 185230f712c9SDave Chinner * Filling in the last part of a previous delayed allocation. 185330f712c9SDave Chinner * The right neighbor is not contiguous. 185430f712c9SDave Chinner */ 1855b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, new); 1856daf83964SChristoph Hellwig ifp->if_nextents++; 1857daf83964SChristoph Hellwig 185830f712c9SDave Chinner if (bma->cur == NULL) 185930f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 186030f712c9SDave Chinner else { 186130f712c9SDave Chinner rval = XFS_ILOG_CORE; 1862e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 186330f712c9SDave Chinner if (error) 186430f712c9SDave Chinner goto done; 1865f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 1866f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1867f9e03706SDarrick J. Wong goto done; 1868f9e03706SDarrick J. Wong } 186930f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 187030f712c9SDave Chinner if (error) 187130f712c9SDave Chinner goto done; 1872f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1873f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1874f9e03706SDarrick J. Wong goto done; 1875f9e03706SDarrick J. Wong } 187630f712c9SDave Chinner } 187730f712c9SDave Chinner 18786d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 187930f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 1880280253d2SBrian Foster &bma->cur, 1, &tmp_rval, whichfork); 188130f712c9SDave Chinner rval |= tmp_rval; 188230f712c9SDave Chinner if (error) 188330f712c9SDave Chinner goto done; 188430f712c9SDave Chinner } 18854dcb8869SChristoph Hellwig 18864dcb8869SChristoph Hellwig temp = PREV.br_blockcount - new->br_blockcount; 188730f712c9SDave Chinner da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), 188830f712c9SDave Chinner startblockval(PREV.br_startblock) - 188992219c29SDave Chinner (bma->cur ? bma->cur->bc_ino.allocated : 0)); 18904dcb8869SChristoph Hellwig 18914dcb8869SChristoph Hellwig PREV.br_startblock = nullstartblock(da_new); 18924dcb8869SChristoph Hellwig PREV.br_blockcount = temp; 18930254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &PREV, state); 1894b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 189530f712c9SDave Chinner break; 189630f712c9SDave Chinner 189730f712c9SDave Chinner case 0: 189830f712c9SDave Chinner /* 189930f712c9SDave Chinner * Filling in the middle part of a previous delayed allocation. 190030f712c9SDave Chinner * Contiguity is impossible here. 190130f712c9SDave Chinner * This case is avoided almost all the time. 190230f712c9SDave Chinner * 190330f712c9SDave Chinner * We start with a delayed allocation: 190430f712c9SDave Chinner * 190530f712c9SDave Chinner * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ 190630f712c9SDave Chinner * PREV @ idx 190730f712c9SDave Chinner * 190830f712c9SDave Chinner * and we are allocating: 190930f712c9SDave Chinner * +rrrrrrrrrrrrrrrrr+ 191030f712c9SDave Chinner * new 191130f712c9SDave Chinner * 191230f712c9SDave Chinner * and we set it up for insertion as: 191330f712c9SDave Chinner * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ 191430f712c9SDave Chinner * new 191530f712c9SDave Chinner * PREV @ idx LEFT RIGHT 191630f712c9SDave Chinner * inserted at idx + 1 191730f712c9SDave Chinner */ 19184dcb8869SChristoph Hellwig old = PREV; 19194dcb8869SChristoph Hellwig 19204dcb8869SChristoph Hellwig /* LEFT is the new middle */ 192130f712c9SDave Chinner LEFT = *new; 19224dcb8869SChristoph Hellwig 19234dcb8869SChristoph Hellwig /* RIGHT is the new right */ 192430f712c9SDave Chinner RIGHT.br_state = PREV.br_state; 192530f712c9SDave Chinner RIGHT.br_startoff = new_endoff; 19264dcb8869SChristoph Hellwig RIGHT.br_blockcount = 19274dcb8869SChristoph Hellwig PREV.br_startoff + PREV.br_blockcount - new_endoff; 19284dcb8869SChristoph Hellwig RIGHT.br_startblock = 19294dcb8869SChristoph Hellwig nullstartblock(xfs_bmap_worst_indlen(bma->ip, 19304dcb8869SChristoph Hellwig RIGHT.br_blockcount)); 19314dcb8869SChristoph Hellwig 19324dcb8869SChristoph Hellwig /* truncate PREV */ 19334dcb8869SChristoph Hellwig PREV.br_blockcount = new->br_startoff - PREV.br_startoff; 19344dcb8869SChristoph Hellwig PREV.br_startblock = 19354dcb8869SChristoph Hellwig nullstartblock(xfs_bmap_worst_indlen(bma->ip, 19364dcb8869SChristoph Hellwig PREV.br_blockcount)); 1937b2b1712aSChristoph Hellwig xfs_iext_update_extent(bma->ip, state, &bma->icur, &PREV); 19384dcb8869SChristoph Hellwig 1939b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &bma->icur); 19400254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &RIGHT, state); 19410254c2f2SChristoph Hellwig xfs_iext_insert(bma->ip, &bma->icur, &LEFT, state); 1942daf83964SChristoph Hellwig ifp->if_nextents++; 19434dcb8869SChristoph Hellwig 194430f712c9SDave Chinner if (bma->cur == NULL) 194530f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 194630f712c9SDave Chinner else { 194730f712c9SDave Chinner rval = XFS_ILOG_CORE; 1948e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(bma->cur, new, &i); 194930f712c9SDave Chinner if (error) 195030f712c9SDave Chinner goto done; 1951f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 1952f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1953f9e03706SDarrick J. Wong goto done; 1954f9e03706SDarrick J. Wong } 195530f712c9SDave Chinner error = xfs_btree_insert(bma->cur, &i); 195630f712c9SDave Chinner if (error) 195730f712c9SDave Chinner goto done; 1958f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 1959f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 1960f9e03706SDarrick J. Wong goto done; 1961f9e03706SDarrick J. Wong } 196230f712c9SDave Chinner } 196330f712c9SDave Chinner 19646d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 196530f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 1966280253d2SBrian Foster &bma->cur, 1, &tmp_rval, whichfork); 196730f712c9SDave Chinner rval |= tmp_rval; 196830f712c9SDave Chinner if (error) 196930f712c9SDave Chinner goto done; 197030f712c9SDave Chinner } 19714dcb8869SChristoph Hellwig 19724dcb8869SChristoph Hellwig da_new = startblockval(PREV.br_startblock) + 19734dcb8869SChristoph Hellwig startblockval(RIGHT.br_startblock); 197430f712c9SDave Chinner break; 197530f712c9SDave Chinner 197630f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 197730f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 197830f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 197930f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 198030f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 198130f712c9SDave Chinner case BMAP_LEFT_CONTIG: 198230f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 198330f712c9SDave Chinner /* 198430f712c9SDave Chinner * These cases are all impossible. 198530f712c9SDave Chinner */ 198630f712c9SDave Chinner ASSERT(0); 198730f712c9SDave Chinner } 198830f712c9SDave Chinner 198995eb308cSDarrick J. Wong /* add reverse mapping unless caller opted out */ 1990bc46ac64SDarrick J. Wong if (!(bma->flags & XFS_BMAPI_NORMAP)) 1991bc46ac64SDarrick J. Wong xfs_rmap_map_extent(bma->tp, bma->ip, whichfork, new); 19929c194644SDarrick J. Wong 199330f712c9SDave Chinner /* convert to a btree if necessary */ 19946d3eb1ecSDarrick J. Wong if (xfs_bmap_needs_btree(bma->ip, whichfork)) { 199530f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 199630f712c9SDave Chinner 199730f712c9SDave Chinner ASSERT(bma->cur == NULL); 199830f712c9SDave Chinner error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, 1999280253d2SBrian Foster &bma->cur, da_old > 0, &tmp_logflags, 2000280253d2SBrian Foster whichfork); 200130f712c9SDave Chinner bma->logflags |= tmp_logflags; 200230f712c9SDave Chinner if (error) 200330f712c9SDave Chinner goto done; 200430f712c9SDave Chinner } 200530f712c9SDave Chinner 20069fe82b8cSDarrick J. Wong if (da_new != da_old) 20079fe82b8cSDarrick J. Wong xfs_mod_delalloc(mp, (int64_t)da_new - da_old); 20089fe82b8cSDarrick J. Wong 2009ca1862b0SChristoph Hellwig if (bma->cur) { 201092219c29SDave Chinner da_new += bma->cur->bc_ino.allocated; 201192219c29SDave Chinner bma->cur->bc_ino.allocated = 0; 201230f712c9SDave Chinner } 201330f712c9SDave Chinner 2014ca1862b0SChristoph Hellwig /* adjust for changes in reserved delayed indirect blocks */ 2015ca1862b0SChristoph Hellwig if (da_new != da_old) { 2016ca1862b0SChristoph Hellwig ASSERT(state == 0 || da_new < da_old); 2017ca1862b0SChristoph Hellwig error = xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), 2018ca1862b0SChristoph Hellwig false); 2019ca1862b0SChristoph Hellwig } 202030f712c9SDave Chinner 20216d3eb1ecSDarrick J. Wong xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); 202230f712c9SDave Chinner done: 202360b4984fSDarrick J. Wong if (whichfork != XFS_COW_FORK) 202430f712c9SDave Chinner bma->logflags |= rval; 202530f712c9SDave Chinner return error; 202630f712c9SDave Chinner #undef LEFT 202730f712c9SDave Chinner #undef RIGHT 202830f712c9SDave Chinner #undef PREV 202930f712c9SDave Chinner } 203030f712c9SDave Chinner 203130f712c9SDave Chinner /* 203230f712c9SDave Chinner * Convert an unwritten allocation to a real allocation or vice versa. 203330f712c9SDave Chinner */ 203426b91c72SChristoph Hellwig int /* error */ 203530f712c9SDave Chinner xfs_bmap_add_extent_unwritten_real( 203630f712c9SDave Chinner struct xfs_trans *tp, 203730f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 203805a630d7SDarrick J. Wong int whichfork, 2039b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 204030f712c9SDave Chinner xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ 204130f712c9SDave Chinner xfs_bmbt_irec_t *new, /* new data to add to file extents */ 204230f712c9SDave Chinner int *logflagsp) /* inode logging flags */ 204330f712c9SDave Chinner { 204430f712c9SDave Chinner xfs_btree_cur_t *cur; /* btree cursor */ 204530f712c9SDave Chinner int error; /* error return value */ 204630f712c9SDave Chinner int i; /* temp state */ 20473ba738dfSChristoph Hellwig struct xfs_ifork *ifp; /* inode fork pointer */ 204830f712c9SDave Chinner xfs_fileoff_t new_endoff; /* end offset of new entry */ 204930f712c9SDave Chinner xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ 205030f712c9SDave Chinner /* left is 0, right is 1, prev is 2 */ 205130f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 2052060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 205305a630d7SDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 205479fa6143SChristoph Hellwig struct xfs_bmbt_irec old; 205530f712c9SDave Chinner 205630f712c9SDave Chinner *logflagsp = 0; 205730f712c9SDave Chinner 205830f712c9SDave Chinner cur = *curp; 205905a630d7SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 206030f712c9SDave Chinner 206130f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 206230f712c9SDave Chinner 2063ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 206430f712c9SDave Chinner 206530f712c9SDave Chinner #define LEFT r[0] 206630f712c9SDave Chinner #define RIGHT r[1] 206730f712c9SDave Chinner #define PREV r[2] 206830f712c9SDave Chinner 206930f712c9SDave Chinner /* 207030f712c9SDave Chinner * Set up a bunch of variables to make the tests simpler. 207130f712c9SDave Chinner */ 207230f712c9SDave Chinner error = 0; 2073b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, icur, &PREV); 207479fa6143SChristoph Hellwig ASSERT(new->br_state != PREV.br_state); 207530f712c9SDave Chinner new_endoff = new->br_startoff + new->br_blockcount; 207630f712c9SDave Chinner ASSERT(PREV.br_startoff <= new->br_startoff); 207730f712c9SDave Chinner ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); 207830f712c9SDave Chinner 207930f712c9SDave Chinner /* 208030f712c9SDave Chinner * Set flags determining what part of the previous oldext allocation 208130f712c9SDave Chinner * extent is being replaced by a newext allocation. 208230f712c9SDave Chinner */ 208330f712c9SDave Chinner if (PREV.br_startoff == new->br_startoff) 208430f712c9SDave Chinner state |= BMAP_LEFT_FILLING; 208530f712c9SDave Chinner if (PREV.br_startoff + PREV.br_blockcount == new_endoff) 208630f712c9SDave Chinner state |= BMAP_RIGHT_FILLING; 208730f712c9SDave Chinner 208830f712c9SDave Chinner /* 208930f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 209030f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 209130f712c9SDave Chinner */ 2092b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, icur, &LEFT)) { 209330f712c9SDave Chinner state |= BMAP_LEFT_VALID; 209430f712c9SDave Chinner if (isnullstartblock(LEFT.br_startblock)) 209530f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 209630f712c9SDave Chinner } 209730f712c9SDave Chinner 209830f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 209930f712c9SDave Chinner LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && 210030f712c9SDave Chinner LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && 210179fa6143SChristoph Hellwig LEFT.br_state == new->br_state && 210230f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) 210330f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 210430f712c9SDave Chinner 210530f712c9SDave Chinner /* 210630f712c9SDave Chinner * Check and set flags if this segment has a right neighbor. 210730f712c9SDave Chinner * Don't set contiguous if the combined extent would be too large. 210830f712c9SDave Chinner * Also check for all-three-contiguous being too large. 210930f712c9SDave Chinner */ 2110b2b1712aSChristoph Hellwig if (xfs_iext_peek_next_extent(ifp, icur, &RIGHT)) { 211130f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 211230f712c9SDave Chinner if (isnullstartblock(RIGHT.br_startblock)) 211330f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 211430f712c9SDave Chinner } 211530f712c9SDave Chinner 211630f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 211730f712c9SDave Chinner new_endoff == RIGHT.br_startoff && 211830f712c9SDave Chinner new->br_startblock + new->br_blockcount == RIGHT.br_startblock && 211979fa6143SChristoph Hellwig new->br_state == RIGHT.br_state && 212030f712c9SDave Chinner new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && 212130f712c9SDave Chinner ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 212230f712c9SDave Chinner BMAP_RIGHT_FILLING)) != 212330f712c9SDave Chinner (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | 212430f712c9SDave Chinner BMAP_RIGHT_FILLING) || 212530f712c9SDave Chinner LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount 212630f712c9SDave Chinner <= MAXEXTLEN)) 212730f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 212830f712c9SDave Chinner 212930f712c9SDave Chinner /* 213030f712c9SDave Chinner * Switch out based on the FILLING and CONTIG state bits. 213130f712c9SDave Chinner */ 213230f712c9SDave Chinner switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 213330f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { 213430f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | 213530f712c9SDave Chinner BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 213630f712c9SDave Chinner /* 213730f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 213830f712c9SDave Chinner * The left and right neighbors are both contiguous with new. 213930f712c9SDave Chinner */ 214079fa6143SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount + RIGHT.br_blockcount; 214130f712c9SDave Chinner 2142c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2143c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2144b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2145b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &LEFT); 2146daf83964SChristoph Hellwig ifp->if_nextents -= 2; 214730f712c9SDave Chinner if (cur == NULL) 214830f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 214930f712c9SDave Chinner else { 215030f712c9SDave Chinner rval = XFS_ILOG_CORE; 2151e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &RIGHT, &i); 2152e16cf9b0SChristoph Hellwig if (error) 215330f712c9SDave Chinner goto done; 2154f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2155f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2156f9e03706SDarrick J. Wong goto done; 2157f9e03706SDarrick J. Wong } 215830f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 215930f712c9SDave Chinner goto done; 2160f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2161f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2162f9e03706SDarrick J. Wong goto done; 2163f9e03706SDarrick J. Wong } 216430f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 216530f712c9SDave Chinner goto done; 2166f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2167f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2168f9e03706SDarrick J. Wong goto done; 2169f9e03706SDarrick J. Wong } 217030f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 217130f712c9SDave Chinner goto done; 2172f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2173f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2174f9e03706SDarrick J. Wong goto done; 2175f9e03706SDarrick J. Wong } 217630f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 217730f712c9SDave Chinner goto done; 2178f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2179f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2180f9e03706SDarrick J. Wong goto done; 2181f9e03706SDarrick J. Wong } 2182a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 218379fa6143SChristoph Hellwig if (error) 218430f712c9SDave Chinner goto done; 218530f712c9SDave Chinner } 218630f712c9SDave Chinner break; 218730f712c9SDave Chinner 218830f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 218930f712c9SDave Chinner /* 219030f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 219130f712c9SDave Chinner * The left neighbor is contiguous, the right is not. 219230f712c9SDave Chinner */ 219379fa6143SChristoph Hellwig LEFT.br_blockcount += PREV.br_blockcount; 219430f712c9SDave Chinner 2195c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2196b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2197b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &LEFT); 2198daf83964SChristoph Hellwig ifp->if_nextents--; 219930f712c9SDave Chinner if (cur == NULL) 220030f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 220130f712c9SDave Chinner else { 220230f712c9SDave Chinner rval = XFS_ILOG_CORE; 2203e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &PREV, &i); 2204e16cf9b0SChristoph Hellwig if (error) 220530f712c9SDave Chinner goto done; 2206f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2207f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2208f9e03706SDarrick J. Wong goto done; 2209f9e03706SDarrick J. Wong } 221030f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 221130f712c9SDave Chinner goto done; 2212f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2213f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2214f9e03706SDarrick J. Wong goto done; 2215f9e03706SDarrick J. Wong } 221630f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 221730f712c9SDave Chinner goto done; 2218f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2219f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2220f9e03706SDarrick J. Wong goto done; 2221f9e03706SDarrick J. Wong } 2222a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 222379fa6143SChristoph Hellwig if (error) 222430f712c9SDave Chinner goto done; 222530f712c9SDave Chinner } 222630f712c9SDave Chinner break; 222730f712c9SDave Chinner 222830f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 222930f712c9SDave Chinner /* 223030f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 223130f712c9SDave Chinner * The right neighbor is contiguous, the left is not. 223230f712c9SDave Chinner */ 223379fa6143SChristoph Hellwig PREV.br_blockcount += RIGHT.br_blockcount; 223479fa6143SChristoph Hellwig PREV.br_state = new->br_state; 2235a6818477SChristoph Hellwig 2236b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 2237c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2238b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2239b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2240daf83964SChristoph Hellwig ifp->if_nextents--; 224179fa6143SChristoph Hellwig 224230f712c9SDave Chinner if (cur == NULL) 224330f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 224430f712c9SDave Chinner else { 224530f712c9SDave Chinner rval = XFS_ILOG_CORE; 2246e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &RIGHT, &i); 2247e16cf9b0SChristoph Hellwig if (error) 224830f712c9SDave Chinner goto done; 2249f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2250f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2251f9e03706SDarrick J. Wong goto done; 2252f9e03706SDarrick J. Wong } 225330f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 225430f712c9SDave Chinner goto done; 2255f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2256f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2257f9e03706SDarrick J. Wong goto done; 2258f9e03706SDarrick J. Wong } 225930f712c9SDave Chinner if ((error = xfs_btree_decrement(cur, 0, &i))) 226030f712c9SDave Chinner goto done; 2261f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2262f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2263f9e03706SDarrick J. Wong goto done; 2264f9e03706SDarrick J. Wong } 2265a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 226679fa6143SChristoph Hellwig if (error) 226730f712c9SDave Chinner goto done; 226830f712c9SDave Chinner } 226930f712c9SDave Chinner break; 227030f712c9SDave Chinner 227130f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 227230f712c9SDave Chinner /* 227330f712c9SDave Chinner * Setting all of a previous oldext extent to newext. 227430f712c9SDave Chinner * Neither the left nor right neighbors are contiguous with 227530f712c9SDave Chinner * the new one. 227630f712c9SDave Chinner */ 227779fa6143SChristoph Hellwig PREV.br_state = new->br_state; 2278b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 227930f712c9SDave Chinner 228030f712c9SDave Chinner if (cur == NULL) 228130f712c9SDave Chinner rval = XFS_ILOG_DEXT; 228230f712c9SDave Chinner else { 228330f712c9SDave Chinner rval = 0; 2284e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 2285e16cf9b0SChristoph Hellwig if (error) 228630f712c9SDave Chinner goto done; 2287f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2288f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2289f9e03706SDarrick J. Wong goto done; 2290f9e03706SDarrick J. Wong } 2291a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 229279fa6143SChristoph Hellwig if (error) 229330f712c9SDave Chinner goto done; 229430f712c9SDave Chinner } 229530f712c9SDave Chinner break; 229630f712c9SDave Chinner 229730f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: 229830f712c9SDave Chinner /* 229930f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 230030f712c9SDave Chinner * The left neighbor is contiguous. 230130f712c9SDave Chinner */ 230279fa6143SChristoph Hellwig LEFT.br_blockcount += new->br_blockcount; 230330f712c9SDave Chinner 230479fa6143SChristoph Hellwig old = PREV; 230579fa6143SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 230679fa6143SChristoph Hellwig PREV.br_startblock += new->br_blockcount; 230779fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 230830f712c9SDave Chinner 2309b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2310b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2311b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &LEFT); 231230f712c9SDave Chinner 231330f712c9SDave Chinner if (cur == NULL) 231430f712c9SDave Chinner rval = XFS_ILOG_DEXT; 231530f712c9SDave Chinner else { 231630f712c9SDave Chinner rval = 0; 2317e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 231879fa6143SChristoph Hellwig if (error) 231930f712c9SDave Chinner goto done; 2320f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2321f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2322f9e03706SDarrick J. Wong goto done; 2323f9e03706SDarrick J. Wong } 2324a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 232579fa6143SChristoph Hellwig if (error) 232630f712c9SDave Chinner goto done; 232779fa6143SChristoph Hellwig error = xfs_btree_decrement(cur, 0, &i); 232879fa6143SChristoph Hellwig if (error) 232930f712c9SDave Chinner goto done; 2330a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &LEFT); 233130f712c9SDave Chinner if (error) 233230f712c9SDave Chinner goto done; 233330f712c9SDave Chinner } 233430f712c9SDave Chinner break; 233530f712c9SDave Chinner 233630f712c9SDave Chinner case BMAP_LEFT_FILLING: 233730f712c9SDave Chinner /* 233830f712c9SDave Chinner * Setting the first part of a previous oldext extent to newext. 233930f712c9SDave Chinner * The left neighbor is not contiguous. 234030f712c9SDave Chinner */ 234179fa6143SChristoph Hellwig old = PREV; 234279fa6143SChristoph Hellwig PREV.br_startoff += new->br_blockcount; 234379fa6143SChristoph Hellwig PREV.br_startblock += new->br_blockcount; 234479fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 234530f712c9SDave Chinner 2346b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 23470254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 2348daf83964SChristoph Hellwig ifp->if_nextents++; 2349daf83964SChristoph Hellwig 235030f712c9SDave Chinner if (cur == NULL) 235130f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 235230f712c9SDave Chinner else { 235330f712c9SDave Chinner rval = XFS_ILOG_CORE; 2354e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 235579fa6143SChristoph Hellwig if (error) 235630f712c9SDave Chinner goto done; 2357f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2358f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2359f9e03706SDarrick J. Wong goto done; 2360f9e03706SDarrick J. Wong } 2361a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 236279fa6143SChristoph Hellwig if (error) 236330f712c9SDave Chinner goto done; 236430f712c9SDave Chinner cur->bc_rec.b = *new; 236530f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 236630f712c9SDave Chinner goto done; 2367f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2368f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2369f9e03706SDarrick J. Wong goto done; 2370f9e03706SDarrick J. Wong } 237130f712c9SDave Chinner } 237230f712c9SDave Chinner break; 237330f712c9SDave Chinner 237430f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: 237530f712c9SDave Chinner /* 237630f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 237730f712c9SDave Chinner * The right neighbor is contiguous with the new allocation. 237830f712c9SDave Chinner */ 237979fa6143SChristoph Hellwig old = PREV; 238079fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 238130f712c9SDave Chinner 238279fa6143SChristoph Hellwig RIGHT.br_startoff = new->br_startoff; 238379fa6143SChristoph Hellwig RIGHT.br_startblock = new->br_startblock; 238479fa6143SChristoph Hellwig RIGHT.br_blockcount += new->br_blockcount; 2385a6818477SChristoph Hellwig 2386b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2387b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 2388b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &RIGHT); 238930f712c9SDave Chinner 239030f712c9SDave Chinner if (cur == NULL) 239130f712c9SDave Chinner rval = XFS_ILOG_DEXT; 239230f712c9SDave Chinner else { 239330f712c9SDave Chinner rval = 0; 2394e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 239579fa6143SChristoph Hellwig if (error) 239630f712c9SDave Chinner goto done; 2397f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2398f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2399f9e03706SDarrick J. Wong goto done; 2400f9e03706SDarrick J. Wong } 2401a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 240279fa6143SChristoph Hellwig if (error) 240330f712c9SDave Chinner goto done; 240479fa6143SChristoph Hellwig error = xfs_btree_increment(cur, 0, &i); 240579fa6143SChristoph Hellwig if (error) 240630f712c9SDave Chinner goto done; 2407a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &RIGHT); 240879fa6143SChristoph Hellwig if (error) 240930f712c9SDave Chinner goto done; 241030f712c9SDave Chinner } 241130f712c9SDave Chinner break; 241230f712c9SDave Chinner 241330f712c9SDave Chinner case BMAP_RIGHT_FILLING: 241430f712c9SDave Chinner /* 241530f712c9SDave Chinner * Setting the last part of a previous oldext extent to newext. 241630f712c9SDave Chinner * The right neighbor is not contiguous. 241730f712c9SDave Chinner */ 241879fa6143SChristoph Hellwig old = PREV; 241979fa6143SChristoph Hellwig PREV.br_blockcount -= new->br_blockcount; 242030f712c9SDave Chinner 2421b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2422b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 24230254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 2424daf83964SChristoph Hellwig ifp->if_nextents++; 242530f712c9SDave Chinner 242630f712c9SDave Chinner if (cur == NULL) 242730f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 242830f712c9SDave Chinner else { 242930f712c9SDave Chinner rval = XFS_ILOG_CORE; 2430e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 243179fa6143SChristoph Hellwig if (error) 243230f712c9SDave Chinner goto done; 2433f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2434f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2435f9e03706SDarrick J. Wong goto done; 2436f9e03706SDarrick J. Wong } 2437a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &PREV); 243879fa6143SChristoph Hellwig if (error) 243930f712c9SDave Chinner goto done; 2440e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 2441e16cf9b0SChristoph Hellwig if (error) 244230f712c9SDave Chinner goto done; 2443f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 2444f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2445f9e03706SDarrick J. Wong goto done; 2446f9e03706SDarrick J. Wong } 244730f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 244830f712c9SDave Chinner goto done; 2449f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2450f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2451f9e03706SDarrick J. Wong goto done; 2452f9e03706SDarrick J. Wong } 245330f712c9SDave Chinner } 245430f712c9SDave Chinner break; 245530f712c9SDave Chinner 245630f712c9SDave Chinner case 0: 245730f712c9SDave Chinner /* 245830f712c9SDave Chinner * Setting the middle part of a previous oldext extent to 245930f712c9SDave Chinner * newext. Contiguity is impossible here. 246030f712c9SDave Chinner * One extent becomes three extents. 246130f712c9SDave Chinner */ 246279fa6143SChristoph Hellwig old = PREV; 246379fa6143SChristoph Hellwig PREV.br_blockcount = new->br_startoff - PREV.br_startoff; 246430f712c9SDave Chinner 246530f712c9SDave Chinner r[0] = *new; 246630f712c9SDave Chinner r[1].br_startoff = new_endoff; 246730f712c9SDave Chinner r[1].br_blockcount = 246879fa6143SChristoph Hellwig old.br_startoff + old.br_blockcount - new_endoff; 246930f712c9SDave Chinner r[1].br_startblock = new->br_startblock + new->br_blockcount; 247079fa6143SChristoph Hellwig r[1].br_state = PREV.br_state; 247130f712c9SDave Chinner 2472b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &PREV); 2473b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 24740254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &r[1], state); 24750254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &r[0], state); 2476daf83964SChristoph Hellwig ifp->if_nextents += 2; 247730f712c9SDave Chinner 247830f712c9SDave Chinner if (cur == NULL) 247930f712c9SDave Chinner rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; 248030f712c9SDave Chinner else { 248130f712c9SDave Chinner rval = XFS_ILOG_CORE; 2482e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 248379fa6143SChristoph Hellwig if (error) 248430f712c9SDave Chinner goto done; 2485f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2486f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2487f9e03706SDarrick J. Wong goto done; 2488f9e03706SDarrick J. Wong } 248930f712c9SDave Chinner /* new right extent - oldext */ 2490a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &r[1]); 2491a67d00a5SChristoph Hellwig if (error) 249230f712c9SDave Chinner goto done; 249330f712c9SDave Chinner /* new left extent - oldext */ 249430f712c9SDave Chinner cur->bc_rec.b = PREV; 249530f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 249630f712c9SDave Chinner goto done; 2497f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2498f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2499f9e03706SDarrick J. Wong goto done; 2500f9e03706SDarrick J. Wong } 250130f712c9SDave Chinner /* 250230f712c9SDave Chinner * Reset the cursor to the position of the new extent 250330f712c9SDave Chinner * we are about to insert as we can't trust it after 250430f712c9SDave Chinner * the previous insert. 250530f712c9SDave Chinner */ 2506e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 2507e16cf9b0SChristoph Hellwig if (error) 250830f712c9SDave Chinner goto done; 2509f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 2510f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2511f9e03706SDarrick J. Wong goto done; 2512f9e03706SDarrick J. Wong } 251330f712c9SDave Chinner /* new middle extent - newext */ 251430f712c9SDave Chinner if ((error = xfs_btree_insert(cur, &i))) 251530f712c9SDave Chinner goto done; 2516f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2517f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2518f9e03706SDarrick J. Wong goto done; 2519f9e03706SDarrick J. Wong } 252030f712c9SDave Chinner } 252130f712c9SDave Chinner break; 252230f712c9SDave Chinner 252330f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 252430f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 252530f712c9SDave Chinner case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: 252630f712c9SDave Chinner case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: 252730f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 252830f712c9SDave Chinner case BMAP_LEFT_CONTIG: 252930f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 253030f712c9SDave Chinner /* 253130f712c9SDave Chinner * These cases are all impossible. 253230f712c9SDave Chinner */ 253330f712c9SDave Chinner ASSERT(0); 253430f712c9SDave Chinner } 253530f712c9SDave Chinner 25369c194644SDarrick J. Wong /* update reverse mappings */ 2537bc46ac64SDarrick J. Wong xfs_rmap_convert_extent(mp, tp, ip, whichfork, new); 25389c194644SDarrick J. Wong 253930f712c9SDave Chinner /* convert to a btree if necessary */ 254005a630d7SDarrick J. Wong if (xfs_bmap_needs_btree(ip, whichfork)) { 254130f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 254230f712c9SDave Chinner 254330f712c9SDave Chinner ASSERT(cur == NULL); 2544280253d2SBrian Foster error = xfs_bmap_extents_to_btree(tp, ip, &cur, 0, 2545280253d2SBrian Foster &tmp_logflags, whichfork); 254630f712c9SDave Chinner *logflagsp |= tmp_logflags; 254730f712c9SDave Chinner if (error) 254830f712c9SDave Chinner goto done; 254930f712c9SDave Chinner } 255030f712c9SDave Chinner 255130f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 255230f712c9SDave Chinner if (cur) { 255392219c29SDave Chinner cur->bc_ino.allocated = 0; 255430f712c9SDave Chinner *curp = cur; 255530f712c9SDave Chinner } 255630f712c9SDave Chinner 255705a630d7SDarrick J. Wong xfs_bmap_check_leaf_extents(*curp, ip, whichfork); 255830f712c9SDave Chinner done: 255930f712c9SDave Chinner *logflagsp |= rval; 256030f712c9SDave Chinner return error; 256130f712c9SDave Chinner #undef LEFT 256230f712c9SDave Chinner #undef RIGHT 256330f712c9SDave Chinner #undef PREV 256430f712c9SDave Chinner } 256530f712c9SDave Chinner 256630f712c9SDave Chinner /* 256730f712c9SDave Chinner * Convert a hole to a delayed allocation. 256830f712c9SDave Chinner */ 256930f712c9SDave Chinner STATIC void 257030f712c9SDave Chinner xfs_bmap_add_extent_hole_delay( 257130f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 2572be51f811SDarrick J. Wong int whichfork, 2573b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 257430f712c9SDave Chinner xfs_bmbt_irec_t *new) /* new data to add to file extents */ 257530f712c9SDave Chinner { 25763ba738dfSChristoph Hellwig struct xfs_ifork *ifp; /* inode fork pointer */ 257730f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 257830f712c9SDave Chinner xfs_filblks_t newlen=0; /* new indirect size */ 257930f712c9SDave Chinner xfs_filblks_t oldlen=0; /* old indirect size */ 258030f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 2581060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 25823ffc18ecSChristoph Hellwig xfs_filblks_t temp; /* temp for indirect calculations */ 258330f712c9SDave Chinner 2584be51f811SDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 258530f712c9SDave Chinner ASSERT(isnullstartblock(new->br_startblock)); 258630f712c9SDave Chinner 258730f712c9SDave Chinner /* 258830f712c9SDave Chinner * Check and set flags if this segment has a left neighbor 258930f712c9SDave Chinner */ 2590b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, icur, &left)) { 259130f712c9SDave Chinner state |= BMAP_LEFT_VALID; 259230f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 259330f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 259430f712c9SDave Chinner } 259530f712c9SDave Chinner 259630f712c9SDave Chinner /* 259730f712c9SDave Chinner * Check and set flags if the current (right) segment exists. 259830f712c9SDave Chinner * If it doesn't exist, we're converting the hole at end-of-file. 259930f712c9SDave Chinner */ 2600b2b1712aSChristoph Hellwig if (xfs_iext_get_extent(ifp, icur, &right)) { 260130f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 260230f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 260330f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 260430f712c9SDave Chinner } 260530f712c9SDave Chinner 260630f712c9SDave Chinner /* 260730f712c9SDave Chinner * Set contiguity flags on the left and right neighbors. 260830f712c9SDave Chinner * Don't let extents get too large, even if the pieces are contiguous. 260930f712c9SDave Chinner */ 261030f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && 261130f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 261230f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 261330f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 261430f712c9SDave Chinner 261530f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && 261630f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 261730f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 261830f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 261930f712c9SDave Chinner (left.br_blockcount + new->br_blockcount + 262030f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN))) 262130f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 262230f712c9SDave Chinner 262330f712c9SDave Chinner /* 262430f712c9SDave Chinner * Switch out based on the contiguity flags. 262530f712c9SDave Chinner */ 262630f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 262730f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 262830f712c9SDave Chinner /* 262930f712c9SDave Chinner * New allocation is contiguous with delayed allocations 263030f712c9SDave Chinner * on the left and on the right. 263130f712c9SDave Chinner * Merge all three into a single extent record. 263230f712c9SDave Chinner */ 263330f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount + 263430f712c9SDave Chinner right.br_blockcount; 263530f712c9SDave Chinner 263630f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 263730f712c9SDave Chinner startblockval(new->br_startblock) + 263830f712c9SDave Chinner startblockval(right.br_startblock); 26390e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 26400e339ef8SBrian Foster oldlen); 26413ffc18ecSChristoph Hellwig left.br_startblock = nullstartblock(newlen); 26423ffc18ecSChristoph Hellwig left.br_blockcount = temp; 264330f712c9SDave Chinner 2644c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2645b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2646b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 264730f712c9SDave Chinner break; 264830f712c9SDave Chinner 264930f712c9SDave Chinner case BMAP_LEFT_CONTIG: 265030f712c9SDave Chinner /* 265130f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 265230f712c9SDave Chinner * on the left. 265330f712c9SDave Chinner * Merge the new allocation with the left neighbor. 265430f712c9SDave Chinner */ 265530f712c9SDave Chinner temp = left.br_blockcount + new->br_blockcount; 265630f712c9SDave Chinner 265730f712c9SDave Chinner oldlen = startblockval(left.br_startblock) + 265830f712c9SDave Chinner startblockval(new->br_startblock); 26590e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 26600e339ef8SBrian Foster oldlen); 26613ffc18ecSChristoph Hellwig left.br_blockcount = temp; 26623ffc18ecSChristoph Hellwig left.br_startblock = nullstartblock(newlen); 266341d196f4SChristoph Hellwig 2664b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2665b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 266630f712c9SDave Chinner break; 266730f712c9SDave Chinner 266830f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 266930f712c9SDave Chinner /* 267030f712c9SDave Chinner * New allocation is contiguous with a delayed allocation 267130f712c9SDave Chinner * on the right. 267230f712c9SDave Chinner * Merge the new allocation with the right neighbor. 267330f712c9SDave Chinner */ 267430f712c9SDave Chinner temp = new->br_blockcount + right.br_blockcount; 267530f712c9SDave Chinner oldlen = startblockval(new->br_startblock) + 267630f712c9SDave Chinner startblockval(right.br_startblock); 26770e339ef8SBrian Foster newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), 26780e339ef8SBrian Foster oldlen); 26793ffc18ecSChristoph Hellwig right.br_startoff = new->br_startoff; 26803ffc18ecSChristoph Hellwig right.br_startblock = nullstartblock(newlen); 26813ffc18ecSChristoph Hellwig right.br_blockcount = temp; 2682b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &right); 268330f712c9SDave Chinner break; 268430f712c9SDave Chinner 268530f712c9SDave Chinner case 0: 268630f712c9SDave Chinner /* 268730f712c9SDave Chinner * New allocation is not contiguous with another 268830f712c9SDave Chinner * delayed allocation. 268930f712c9SDave Chinner * Insert a new entry. 269030f712c9SDave Chinner */ 269130f712c9SDave Chinner oldlen = newlen = 0; 26920254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 269330f712c9SDave Chinner break; 269430f712c9SDave Chinner } 269530f712c9SDave Chinner if (oldlen != newlen) { 269630f712c9SDave Chinner ASSERT(oldlen > newlen); 26970d485adaSDave Chinner xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), 26980d485adaSDave Chinner false); 269930f712c9SDave Chinner /* 270030f712c9SDave Chinner * Nothing to do for disk quota accounting here. 270130f712c9SDave Chinner */ 27029fe82b8cSDarrick J. Wong xfs_mod_delalloc(ip->i_mount, (int64_t)newlen - oldlen); 270330f712c9SDave Chinner } 270430f712c9SDave Chinner } 270530f712c9SDave Chinner 270630f712c9SDave Chinner /* 270730f712c9SDave Chinner * Convert a hole to a real allocation. 270830f712c9SDave Chinner */ 270930f712c9SDave Chinner STATIC int /* error */ 271030f712c9SDave Chinner xfs_bmap_add_extent_hole_real( 27116d04558fSChristoph Hellwig struct xfs_trans *tp, 27126d04558fSChristoph Hellwig struct xfs_inode *ip, 27136d04558fSChristoph Hellwig int whichfork, 2714b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 27156d04558fSChristoph Hellwig struct xfs_btree_cur **curp, 27166d04558fSChristoph Hellwig struct xfs_bmbt_irec *new, 271795eb308cSDarrick J. Wong int *logflagsp, 271895eb308cSDarrick J. Wong int flags) 271930f712c9SDave Chinner { 27206d04558fSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 27216d04558fSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 27226d04558fSChristoph Hellwig struct xfs_btree_cur *cur = *curp; 272330f712c9SDave Chinner int error; /* error return value */ 272430f712c9SDave Chinner int i; /* temp state */ 272530f712c9SDave Chinner xfs_bmbt_irec_t left; /* left neighbor extent entry */ 272630f712c9SDave Chinner xfs_bmbt_irec_t right; /* right neighbor extent entry */ 272730f712c9SDave Chinner int rval=0; /* return value (logging flags) */ 2728060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 27291abb9e55SChristoph Hellwig struct xfs_bmbt_irec old; 273030f712c9SDave Chinner 273130f712c9SDave Chinner ASSERT(!isnullstartblock(new->br_startblock)); 27328ef54797SDave Chinner ASSERT(!cur || !(cur->bc_ino.flags & XFS_BTCUR_BMBT_WASDEL)); 273330f712c9SDave Chinner 2734ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_add_exlist); 273530f712c9SDave Chinner 273630f712c9SDave Chinner /* 273730f712c9SDave Chinner * Check and set flags if this segment has a left neighbor. 273830f712c9SDave Chinner */ 2739b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, icur, &left)) { 274030f712c9SDave Chinner state |= BMAP_LEFT_VALID; 274130f712c9SDave Chinner if (isnullstartblock(left.br_startblock)) 274230f712c9SDave Chinner state |= BMAP_LEFT_DELAY; 274330f712c9SDave Chinner } 274430f712c9SDave Chinner 274530f712c9SDave Chinner /* 274630f712c9SDave Chinner * Check and set flags if this segment has a current value. 274730f712c9SDave Chinner * Not true if we're inserting into the "hole" at eof. 274830f712c9SDave Chinner */ 2749b2b1712aSChristoph Hellwig if (xfs_iext_get_extent(ifp, icur, &right)) { 275030f712c9SDave Chinner state |= BMAP_RIGHT_VALID; 275130f712c9SDave Chinner if (isnullstartblock(right.br_startblock)) 275230f712c9SDave Chinner state |= BMAP_RIGHT_DELAY; 275330f712c9SDave Chinner } 275430f712c9SDave Chinner 275530f712c9SDave Chinner /* 275630f712c9SDave Chinner * We're inserting a real allocation between "left" and "right". 275730f712c9SDave Chinner * Set the contiguity flags. Don't let extents get too large. 275830f712c9SDave Chinner */ 275930f712c9SDave Chinner if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && 276030f712c9SDave Chinner left.br_startoff + left.br_blockcount == new->br_startoff && 276130f712c9SDave Chinner left.br_startblock + left.br_blockcount == new->br_startblock && 276230f712c9SDave Chinner left.br_state == new->br_state && 276330f712c9SDave Chinner left.br_blockcount + new->br_blockcount <= MAXEXTLEN) 276430f712c9SDave Chinner state |= BMAP_LEFT_CONTIG; 276530f712c9SDave Chinner 276630f712c9SDave Chinner if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && 276730f712c9SDave Chinner new->br_startoff + new->br_blockcount == right.br_startoff && 276830f712c9SDave Chinner new->br_startblock + new->br_blockcount == right.br_startblock && 276930f712c9SDave Chinner new->br_state == right.br_state && 277030f712c9SDave Chinner new->br_blockcount + right.br_blockcount <= MAXEXTLEN && 277130f712c9SDave Chinner (!(state & BMAP_LEFT_CONTIG) || 277230f712c9SDave Chinner left.br_blockcount + new->br_blockcount + 277330f712c9SDave Chinner right.br_blockcount <= MAXEXTLEN)) 277430f712c9SDave Chinner state |= BMAP_RIGHT_CONTIG; 277530f712c9SDave Chinner 277630f712c9SDave Chinner error = 0; 277730f712c9SDave Chinner /* 277830f712c9SDave Chinner * Select which case we're in here, and implement it. 277930f712c9SDave Chinner */ 278030f712c9SDave Chinner switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { 278130f712c9SDave Chinner case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: 278230f712c9SDave Chinner /* 278330f712c9SDave Chinner * New allocation is contiguous with real allocations on the 278430f712c9SDave Chinner * left and on the right. 278530f712c9SDave Chinner * Merge all three into a single extent record. 278630f712c9SDave Chinner */ 27871abb9e55SChristoph Hellwig left.br_blockcount += new->br_blockcount + right.br_blockcount; 278830f712c9SDave Chinner 2789c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 2790b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2791b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 2792daf83964SChristoph Hellwig ifp->if_nextents--; 279330f712c9SDave Chinner 27946d04558fSChristoph Hellwig if (cur == NULL) { 279530f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 279630f712c9SDave Chinner } else { 279730f712c9SDave Chinner rval = XFS_ILOG_CORE; 2798e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &right, &i); 279930f712c9SDave Chinner if (error) 280030f712c9SDave Chinner goto done; 2801f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2802f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2803f9e03706SDarrick J. Wong goto done; 2804f9e03706SDarrick J. Wong } 28056d04558fSChristoph Hellwig error = xfs_btree_delete(cur, &i); 280630f712c9SDave Chinner if (error) 280730f712c9SDave Chinner goto done; 2808f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2809f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2810f9e03706SDarrick J. Wong goto done; 2811f9e03706SDarrick J. Wong } 28126d04558fSChristoph Hellwig error = xfs_btree_decrement(cur, 0, &i); 281330f712c9SDave Chinner if (error) 281430f712c9SDave Chinner goto done; 2815f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2816f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2817f9e03706SDarrick J. Wong goto done; 2818f9e03706SDarrick J. Wong } 2819a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &left); 282030f712c9SDave Chinner if (error) 282130f712c9SDave Chinner goto done; 282230f712c9SDave Chinner } 282330f712c9SDave Chinner break; 282430f712c9SDave Chinner 282530f712c9SDave Chinner case BMAP_LEFT_CONTIG: 282630f712c9SDave Chinner /* 282730f712c9SDave Chinner * New allocation is contiguous with a real allocation 282830f712c9SDave Chinner * on the left. 282930f712c9SDave Chinner * Merge the new allocation with the left neighbor. 283030f712c9SDave Chinner */ 28311abb9e55SChristoph Hellwig old = left; 28321abb9e55SChristoph Hellwig left.br_blockcount += new->br_blockcount; 28331d2e0089SChristoph Hellwig 2834b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 2835b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &left); 283630f712c9SDave Chinner 28376d04558fSChristoph Hellwig if (cur == NULL) { 283830f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 283930f712c9SDave Chinner } else { 284030f712c9SDave Chinner rval = 0; 2841e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 284230f712c9SDave Chinner if (error) 284330f712c9SDave Chinner goto done; 2844f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2845f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2846f9e03706SDarrick J. Wong goto done; 2847f9e03706SDarrick J. Wong } 2848a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &left); 284930f712c9SDave Chinner if (error) 285030f712c9SDave Chinner goto done; 285130f712c9SDave Chinner } 285230f712c9SDave Chinner break; 285330f712c9SDave Chinner 285430f712c9SDave Chinner case BMAP_RIGHT_CONTIG: 285530f712c9SDave Chinner /* 285630f712c9SDave Chinner * New allocation is contiguous with a real allocation 285730f712c9SDave Chinner * on the right. 285830f712c9SDave Chinner * Merge the new allocation with the right neighbor. 285930f712c9SDave Chinner */ 28601abb9e55SChristoph Hellwig old = right; 2861ca5d8e5bSChristoph Hellwig 28621abb9e55SChristoph Hellwig right.br_startoff = new->br_startoff; 28631abb9e55SChristoph Hellwig right.br_startblock = new->br_startblock; 28641abb9e55SChristoph Hellwig right.br_blockcount += new->br_blockcount; 2865b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &right); 286630f712c9SDave Chinner 28676d04558fSChristoph Hellwig if (cur == NULL) { 286830f712c9SDave Chinner rval = xfs_ilog_fext(whichfork); 286930f712c9SDave Chinner } else { 287030f712c9SDave Chinner rval = 0; 2871e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &old, &i); 287230f712c9SDave Chinner if (error) 287330f712c9SDave Chinner goto done; 2874f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2875f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2876f9e03706SDarrick J. Wong goto done; 2877f9e03706SDarrick J. Wong } 2878a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &right); 287930f712c9SDave Chinner if (error) 288030f712c9SDave Chinner goto done; 288130f712c9SDave Chinner } 288230f712c9SDave Chinner break; 288330f712c9SDave Chinner 288430f712c9SDave Chinner case 0: 288530f712c9SDave Chinner /* 288630f712c9SDave Chinner * New allocation is not contiguous with another 288730f712c9SDave Chinner * real allocation. 288830f712c9SDave Chinner * Insert a new entry. 288930f712c9SDave Chinner */ 28900254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, new, state); 2891daf83964SChristoph Hellwig ifp->if_nextents++; 2892daf83964SChristoph Hellwig 28936d04558fSChristoph Hellwig if (cur == NULL) { 289430f712c9SDave Chinner rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); 289530f712c9SDave Chinner } else { 289630f712c9SDave Chinner rval = XFS_ILOG_CORE; 2897e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, new, &i); 289830f712c9SDave Chinner if (error) 289930f712c9SDave Chinner goto done; 2900f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 2901f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2902f9e03706SDarrick J. Wong goto done; 2903f9e03706SDarrick J. Wong } 29046d04558fSChristoph Hellwig error = xfs_btree_insert(cur, &i); 290530f712c9SDave Chinner if (error) 290630f712c9SDave Chinner goto done; 2907f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 2908f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 2909f9e03706SDarrick J. Wong goto done; 2910f9e03706SDarrick J. Wong } 291130f712c9SDave Chinner } 291230f712c9SDave Chinner break; 291330f712c9SDave Chinner } 291430f712c9SDave Chinner 291595eb308cSDarrick J. Wong /* add reverse mapping unless caller opted out */ 2916bc46ac64SDarrick J. Wong if (!(flags & XFS_BMAPI_NORMAP)) 2917bc46ac64SDarrick J. Wong xfs_rmap_map_extent(tp, ip, whichfork, new); 29189c194644SDarrick J. Wong 291930f712c9SDave Chinner /* convert to a btree if necessary */ 29206d04558fSChristoph Hellwig if (xfs_bmap_needs_btree(ip, whichfork)) { 292130f712c9SDave Chinner int tmp_logflags; /* partial log flag return val */ 292230f712c9SDave Chinner 29236d04558fSChristoph Hellwig ASSERT(cur == NULL); 2924280253d2SBrian Foster error = xfs_bmap_extents_to_btree(tp, ip, curp, 0, 2925280253d2SBrian Foster &tmp_logflags, whichfork); 29266d04558fSChristoph Hellwig *logflagsp |= tmp_logflags; 29276d04558fSChristoph Hellwig cur = *curp; 292830f712c9SDave Chinner if (error) 292930f712c9SDave Chinner goto done; 293030f712c9SDave Chinner } 293130f712c9SDave Chinner 293230f712c9SDave Chinner /* clear out the allocated field, done with it now in any case. */ 29336d04558fSChristoph Hellwig if (cur) 293492219c29SDave Chinner cur->bc_ino.allocated = 0; 293530f712c9SDave Chinner 29366d04558fSChristoph Hellwig xfs_bmap_check_leaf_extents(cur, ip, whichfork); 293730f712c9SDave Chinner done: 29386d04558fSChristoph Hellwig *logflagsp |= rval; 293930f712c9SDave Chinner return error; 294030f712c9SDave Chinner } 294130f712c9SDave Chinner 294230f712c9SDave Chinner /* 294330f712c9SDave Chinner * Functions used in the extent read, allocate and remove paths 294430f712c9SDave Chinner */ 294530f712c9SDave Chinner 294630f712c9SDave Chinner /* 2947031474c2SChristoph Hellwig * Adjust the size of the new extent based on i_extsize and rt extsize. 294830f712c9SDave Chinner */ 294930f712c9SDave Chinner int 295030f712c9SDave Chinner xfs_bmap_extsize_align( 295130f712c9SDave Chinner xfs_mount_t *mp, 295230f712c9SDave Chinner xfs_bmbt_irec_t *gotp, /* next extent pointer */ 295330f712c9SDave Chinner xfs_bmbt_irec_t *prevp, /* previous extent pointer */ 295430f712c9SDave Chinner xfs_extlen_t extsz, /* align to this extent size */ 295530f712c9SDave Chinner int rt, /* is this a realtime inode? */ 295630f712c9SDave Chinner int eof, /* is extent at end-of-file? */ 295730f712c9SDave Chinner int delay, /* creating delalloc extent? */ 295830f712c9SDave Chinner int convert, /* overwriting unwritten extent? */ 295930f712c9SDave Chinner xfs_fileoff_t *offp, /* in/out: aligned offset */ 296030f712c9SDave Chinner xfs_extlen_t *lenp) /* in/out: aligned length */ 296130f712c9SDave Chinner { 296230f712c9SDave Chinner xfs_fileoff_t orig_off; /* original offset */ 296330f712c9SDave Chinner xfs_extlen_t orig_alen; /* original length */ 296430f712c9SDave Chinner xfs_fileoff_t orig_end; /* original off+len */ 296530f712c9SDave Chinner xfs_fileoff_t nexto; /* next file offset */ 296630f712c9SDave Chinner xfs_fileoff_t prevo; /* previous file offset */ 296730f712c9SDave Chinner xfs_fileoff_t align_off; /* temp for offset */ 296830f712c9SDave Chinner xfs_extlen_t align_alen; /* temp for length */ 296930f712c9SDave Chinner xfs_extlen_t temp; /* temp for calculations */ 297030f712c9SDave Chinner 297130f712c9SDave Chinner if (convert) 297230f712c9SDave Chinner return 0; 297330f712c9SDave Chinner 297430f712c9SDave Chinner orig_off = align_off = *offp; 297530f712c9SDave Chinner orig_alen = align_alen = *lenp; 297630f712c9SDave Chinner orig_end = orig_off + orig_alen; 297730f712c9SDave Chinner 297830f712c9SDave Chinner /* 297930f712c9SDave Chinner * If this request overlaps an existing extent, then don't 298030f712c9SDave Chinner * attempt to perform any additional alignment. 298130f712c9SDave Chinner */ 298230f712c9SDave Chinner if (!delay && !eof && 298330f712c9SDave Chinner (orig_off >= gotp->br_startoff) && 298430f712c9SDave Chinner (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { 298530f712c9SDave Chinner return 0; 298630f712c9SDave Chinner } 298730f712c9SDave Chinner 298830f712c9SDave Chinner /* 298930f712c9SDave Chinner * If the file offset is unaligned vs. the extent size 299030f712c9SDave Chinner * we need to align it. This will be possible unless 299130f712c9SDave Chinner * the file was previously written with a kernel that didn't 299230f712c9SDave Chinner * perform this alignment, or if a truncate shot us in the 299330f712c9SDave Chinner * foot. 299430f712c9SDave Chinner */ 29950703a8e1SDave Chinner div_u64_rem(orig_off, extsz, &temp); 299630f712c9SDave Chinner if (temp) { 299730f712c9SDave Chinner align_alen += temp; 299830f712c9SDave Chinner align_off -= temp; 299930f712c9SDave Chinner } 30006dea405eSDave Chinner 30016dea405eSDave Chinner /* Same adjustment for the end of the requested area. */ 30026dea405eSDave Chinner temp = (align_alen % extsz); 30036dea405eSDave Chinner if (temp) 300430f712c9SDave Chinner align_alen += extsz - temp; 30056dea405eSDave Chinner 30066dea405eSDave Chinner /* 30076dea405eSDave Chinner * For large extent hint sizes, the aligned extent might be larger than 30086dea405eSDave Chinner * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls 30096dea405eSDave Chinner * the length back under MAXEXTLEN. The outer allocation loops handle 30106dea405eSDave Chinner * short allocation just fine, so it is safe to do this. We only want to 30116dea405eSDave Chinner * do it when we are forced to, though, because it means more allocation 30126dea405eSDave Chinner * operations are required. 30136dea405eSDave Chinner */ 30146dea405eSDave Chinner while (align_alen > MAXEXTLEN) 30156dea405eSDave Chinner align_alen -= extsz; 30166dea405eSDave Chinner ASSERT(align_alen <= MAXEXTLEN); 30176dea405eSDave Chinner 301830f712c9SDave Chinner /* 301930f712c9SDave Chinner * If the previous block overlaps with this proposed allocation 302030f712c9SDave Chinner * then move the start forward without adjusting the length. 302130f712c9SDave Chinner */ 302230f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) { 302330f712c9SDave Chinner if (prevp->br_startblock == HOLESTARTBLOCK) 302430f712c9SDave Chinner prevo = prevp->br_startoff; 302530f712c9SDave Chinner else 302630f712c9SDave Chinner prevo = prevp->br_startoff + prevp->br_blockcount; 302730f712c9SDave Chinner } else 302830f712c9SDave Chinner prevo = 0; 302930f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 303030f712c9SDave Chinner align_off = prevo; 303130f712c9SDave Chinner /* 303230f712c9SDave Chinner * If the next block overlaps with this proposed allocation 303330f712c9SDave Chinner * then move the start back without adjusting the length, 303430f712c9SDave Chinner * but not before offset 0. 303530f712c9SDave Chinner * This may of course make the start overlap previous block, 303630f712c9SDave Chinner * and if we hit the offset 0 limit then the next block 303730f712c9SDave Chinner * can still overlap too. 303830f712c9SDave Chinner */ 303930f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) { 304030f712c9SDave Chinner if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || 304130f712c9SDave Chinner (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) 304230f712c9SDave Chinner nexto = gotp->br_startoff + gotp->br_blockcount; 304330f712c9SDave Chinner else 304430f712c9SDave Chinner nexto = gotp->br_startoff; 304530f712c9SDave Chinner } else 304630f712c9SDave Chinner nexto = NULLFILEOFF; 304730f712c9SDave Chinner if (!eof && 304830f712c9SDave Chinner align_off + align_alen != orig_end && 304930f712c9SDave Chinner align_off + align_alen > nexto) 305030f712c9SDave Chinner align_off = nexto > align_alen ? nexto - align_alen : 0; 305130f712c9SDave Chinner /* 305230f712c9SDave Chinner * If we're now overlapping the next or previous extent that 305330f712c9SDave Chinner * means we can't fit an extsz piece in this hole. Just move 305430f712c9SDave Chinner * the start forward to the first valid spot and set 305530f712c9SDave Chinner * the length so we hit the end. 305630f712c9SDave Chinner */ 305730f712c9SDave Chinner if (align_off != orig_off && align_off < prevo) 305830f712c9SDave Chinner align_off = prevo; 305930f712c9SDave Chinner if (align_off + align_alen != orig_end && 306030f712c9SDave Chinner align_off + align_alen > nexto && 306130f712c9SDave Chinner nexto != NULLFILEOFF) { 306230f712c9SDave Chinner ASSERT(nexto > prevo); 306330f712c9SDave Chinner align_alen = nexto - align_off; 306430f712c9SDave Chinner } 306530f712c9SDave Chinner 306630f712c9SDave Chinner /* 306730f712c9SDave Chinner * If realtime, and the result isn't a multiple of the realtime 306830f712c9SDave Chinner * extent size we need to remove blocks until it is. 306930f712c9SDave Chinner */ 307030f712c9SDave Chinner if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { 307130f712c9SDave Chinner /* 307230f712c9SDave Chinner * We're not covering the original request, or 307330f712c9SDave Chinner * we won't be able to once we fix the length. 307430f712c9SDave Chinner */ 307530f712c9SDave Chinner if (orig_off < align_off || 307630f712c9SDave Chinner orig_end > align_off + align_alen || 307730f712c9SDave Chinner align_alen - temp < orig_alen) 30782451337dSDave Chinner return -EINVAL; 307930f712c9SDave Chinner /* 308030f712c9SDave Chinner * Try to fix it by moving the start up. 308130f712c9SDave Chinner */ 308230f712c9SDave Chinner if (align_off + temp <= orig_off) { 308330f712c9SDave Chinner align_alen -= temp; 308430f712c9SDave Chinner align_off += temp; 308530f712c9SDave Chinner } 308630f712c9SDave Chinner /* 308730f712c9SDave Chinner * Try to fix it by moving the end in. 308830f712c9SDave Chinner */ 308930f712c9SDave Chinner else if (align_off + align_alen - temp >= orig_end) 309030f712c9SDave Chinner align_alen -= temp; 309130f712c9SDave Chinner /* 309230f712c9SDave Chinner * Set the start to the minimum then trim the length. 309330f712c9SDave Chinner */ 309430f712c9SDave Chinner else { 309530f712c9SDave Chinner align_alen -= orig_off - align_off; 309630f712c9SDave Chinner align_off = orig_off; 309730f712c9SDave Chinner align_alen -= align_alen % mp->m_sb.sb_rextsize; 309830f712c9SDave Chinner } 309930f712c9SDave Chinner /* 310030f712c9SDave Chinner * Result doesn't cover the request, fail it. 310130f712c9SDave Chinner */ 310230f712c9SDave Chinner if (orig_off < align_off || orig_end > align_off + align_alen) 31032451337dSDave Chinner return -EINVAL; 310430f712c9SDave Chinner } else { 310530f712c9SDave Chinner ASSERT(orig_off >= align_off); 31066dea405eSDave Chinner /* see MAXEXTLEN handling above */ 31076dea405eSDave Chinner ASSERT(orig_end <= align_off + align_alen || 31086dea405eSDave Chinner align_alen + extsz > MAXEXTLEN); 310930f712c9SDave Chinner } 311030f712c9SDave Chinner 311130f712c9SDave Chinner #ifdef DEBUG 311230f712c9SDave Chinner if (!eof && gotp->br_startoff != NULLFILEOFF) 311330f712c9SDave Chinner ASSERT(align_off + align_alen <= gotp->br_startoff); 311430f712c9SDave Chinner if (prevp->br_startoff != NULLFILEOFF) 311530f712c9SDave Chinner ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); 311630f712c9SDave Chinner #endif 311730f712c9SDave Chinner 311830f712c9SDave Chinner *lenp = align_alen; 311930f712c9SDave Chinner *offp = align_off; 312030f712c9SDave Chinner return 0; 312130f712c9SDave Chinner } 312230f712c9SDave Chinner 312330f712c9SDave Chinner #define XFS_ALLOC_GAP_UNITS 4 312430f712c9SDave Chinner 312530f712c9SDave Chinner void 312630f712c9SDave Chinner xfs_bmap_adjacent( 312730f712c9SDave Chinner struct xfs_bmalloca *ap) /* bmap alloc argument struct */ 312830f712c9SDave Chinner { 312930f712c9SDave Chinner xfs_fsblock_t adjust; /* adjustment to block numbers */ 313030f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 313130f712c9SDave Chinner xfs_mount_t *mp; /* mount point structure */ 313230f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 313330f712c9SDave Chinner int rt; /* true if inode is realtime */ 313430f712c9SDave Chinner 313530f712c9SDave Chinner #define ISVALID(x,y) \ 313630f712c9SDave Chinner (rt ? \ 313730f712c9SDave Chinner (x) < mp->m_sb.sb_rblocks : \ 313830f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ 313930f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ 314030f712c9SDave Chinner XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) 314130f712c9SDave Chinner 314230f712c9SDave Chinner mp = ap->ip->i_mount; 314394c07b4dSBrian Foster nullfb = ap->tp->t_firstblock == NULLFSBLOCK; 3144292378edSDave Chinner rt = XFS_IS_REALTIME_INODE(ap->ip) && 3145c34d570dSChristoph Hellwig (ap->datatype & XFS_ALLOC_USERDATA); 314694c07b4dSBrian Foster fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, 314794c07b4dSBrian Foster ap->tp->t_firstblock); 314830f712c9SDave Chinner /* 314930f712c9SDave Chinner * If allocating at eof, and there's a previous real block, 315030f712c9SDave Chinner * try to use its last block as our starting point. 315130f712c9SDave Chinner */ 315230f712c9SDave Chinner if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && 315330f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 315430f712c9SDave Chinner ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, 315530f712c9SDave Chinner ap->prev.br_startblock)) { 315630f712c9SDave Chinner ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; 315730f712c9SDave Chinner /* 315830f712c9SDave Chinner * Adjust for the gap between prevp and us. 315930f712c9SDave Chinner */ 316030f712c9SDave Chinner adjust = ap->offset - 316130f712c9SDave Chinner (ap->prev.br_startoff + ap->prev.br_blockcount); 316230f712c9SDave Chinner if (adjust && 316330f712c9SDave Chinner ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) 316430f712c9SDave Chinner ap->blkno += adjust; 316530f712c9SDave Chinner } 316630f712c9SDave Chinner /* 316730f712c9SDave Chinner * If not at eof, then compare the two neighbor blocks. 316830f712c9SDave Chinner * Figure out whether either one gives us a good starting point, 316930f712c9SDave Chinner * and pick the better one. 317030f712c9SDave Chinner */ 317130f712c9SDave Chinner else if (!ap->eof) { 317230f712c9SDave Chinner xfs_fsblock_t gotbno; /* right side block number */ 317330f712c9SDave Chinner xfs_fsblock_t gotdiff=0; /* right side difference */ 317430f712c9SDave Chinner xfs_fsblock_t prevbno; /* left side block number */ 317530f712c9SDave Chinner xfs_fsblock_t prevdiff=0; /* left side difference */ 317630f712c9SDave Chinner 317730f712c9SDave Chinner /* 317830f712c9SDave Chinner * If there's a previous (left) block, select a requested 317930f712c9SDave Chinner * start block based on it. 318030f712c9SDave Chinner */ 318130f712c9SDave Chinner if (ap->prev.br_startoff != NULLFILEOFF && 318230f712c9SDave Chinner !isnullstartblock(ap->prev.br_startblock) && 318330f712c9SDave Chinner (prevbno = ap->prev.br_startblock + 318430f712c9SDave Chinner ap->prev.br_blockcount) && 318530f712c9SDave Chinner ISVALID(prevbno, ap->prev.br_startblock)) { 318630f712c9SDave Chinner /* 318730f712c9SDave Chinner * Calculate gap to end of previous block. 318830f712c9SDave Chinner */ 318930f712c9SDave Chinner adjust = prevdiff = ap->offset - 319030f712c9SDave Chinner (ap->prev.br_startoff + 319130f712c9SDave Chinner ap->prev.br_blockcount); 319230f712c9SDave Chinner /* 319330f712c9SDave Chinner * Figure the startblock based on the previous block's 319430f712c9SDave Chinner * end and the gap size. 319530f712c9SDave Chinner * Heuristic! 319630f712c9SDave Chinner * If the gap is large relative to the piece we're 319730f712c9SDave Chinner * allocating, or using it gives us an invalid block 319830f712c9SDave Chinner * number, then just use the end of the previous block. 319930f712c9SDave Chinner */ 320030f712c9SDave Chinner if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 320130f712c9SDave Chinner ISVALID(prevbno + prevdiff, 320230f712c9SDave Chinner ap->prev.br_startblock)) 320330f712c9SDave Chinner prevbno += adjust; 320430f712c9SDave Chinner else 320530f712c9SDave Chinner prevdiff += adjust; 320630f712c9SDave Chinner /* 320730f712c9SDave Chinner * If the firstblock forbids it, can't use it, 320830f712c9SDave Chinner * must use default. 320930f712c9SDave Chinner */ 321030f712c9SDave Chinner if (!rt && !nullfb && 321130f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) 321230f712c9SDave Chinner prevbno = NULLFSBLOCK; 321330f712c9SDave Chinner } 321430f712c9SDave Chinner /* 321530f712c9SDave Chinner * No previous block or can't follow it, just default. 321630f712c9SDave Chinner */ 321730f712c9SDave Chinner else 321830f712c9SDave Chinner prevbno = NULLFSBLOCK; 321930f712c9SDave Chinner /* 322030f712c9SDave Chinner * If there's a following (right) block, select a requested 322130f712c9SDave Chinner * start block based on it. 322230f712c9SDave Chinner */ 322330f712c9SDave Chinner if (!isnullstartblock(ap->got.br_startblock)) { 322430f712c9SDave Chinner /* 322530f712c9SDave Chinner * Calculate gap to start of next block. 322630f712c9SDave Chinner */ 322730f712c9SDave Chinner adjust = gotdiff = ap->got.br_startoff - ap->offset; 322830f712c9SDave Chinner /* 322930f712c9SDave Chinner * Figure the startblock based on the next block's 323030f712c9SDave Chinner * start and the gap size. 323130f712c9SDave Chinner */ 323230f712c9SDave Chinner gotbno = ap->got.br_startblock; 323330f712c9SDave Chinner /* 323430f712c9SDave Chinner * Heuristic! 323530f712c9SDave Chinner * If the gap is large relative to the piece we're 323630f712c9SDave Chinner * allocating, or using it gives us an invalid block 323730f712c9SDave Chinner * number, then just use the start of the next block 323830f712c9SDave Chinner * offset by our length. 323930f712c9SDave Chinner */ 324030f712c9SDave Chinner if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && 324130f712c9SDave Chinner ISVALID(gotbno - gotdiff, gotbno)) 324230f712c9SDave Chinner gotbno -= adjust; 324330f712c9SDave Chinner else if (ISVALID(gotbno - ap->length, gotbno)) { 324430f712c9SDave Chinner gotbno -= ap->length; 324530f712c9SDave Chinner gotdiff += adjust - ap->length; 324630f712c9SDave Chinner } else 324730f712c9SDave Chinner gotdiff += adjust; 324830f712c9SDave Chinner /* 324930f712c9SDave Chinner * If the firstblock forbids it, can't use it, 325030f712c9SDave Chinner * must use default. 325130f712c9SDave Chinner */ 325230f712c9SDave Chinner if (!rt && !nullfb && 325330f712c9SDave Chinner XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) 325430f712c9SDave Chinner gotbno = NULLFSBLOCK; 325530f712c9SDave Chinner } 325630f712c9SDave Chinner /* 325730f712c9SDave Chinner * No next block, just default. 325830f712c9SDave Chinner */ 325930f712c9SDave Chinner else 326030f712c9SDave Chinner gotbno = NULLFSBLOCK; 326130f712c9SDave Chinner /* 326230f712c9SDave Chinner * If both valid, pick the better one, else the only good 326330f712c9SDave Chinner * one, else ap->blkno is already set (to 0 or the inode block). 326430f712c9SDave Chinner */ 326530f712c9SDave Chinner if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) 326630f712c9SDave Chinner ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; 326730f712c9SDave Chinner else if (prevbno != NULLFSBLOCK) 326830f712c9SDave Chinner ap->blkno = prevbno; 326930f712c9SDave Chinner else if (gotbno != NULLFSBLOCK) 327030f712c9SDave Chinner ap->blkno = gotbno; 327130f712c9SDave Chinner } 327230f712c9SDave Chinner #undef ISVALID 327330f712c9SDave Chinner } 327430f712c9SDave Chinner 327530f712c9SDave Chinner static int 327630f712c9SDave Chinner xfs_bmap_longest_free_extent( 327730f712c9SDave Chinner struct xfs_trans *tp, 327830f712c9SDave Chinner xfs_agnumber_t ag, 327930f712c9SDave Chinner xfs_extlen_t *blen, 328030f712c9SDave Chinner int *notinit) 328130f712c9SDave Chinner { 328230f712c9SDave Chinner struct xfs_mount *mp = tp->t_mountp; 328330f712c9SDave Chinner struct xfs_perag *pag; 328430f712c9SDave Chinner xfs_extlen_t longest; 328530f712c9SDave Chinner int error = 0; 328630f712c9SDave Chinner 328730f712c9SDave Chinner pag = xfs_perag_get(mp, ag); 328830f712c9SDave Chinner if (!pag->pagf_init) { 328930f712c9SDave Chinner error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); 3290f48e2df8SDarrick J. Wong if (error) { 3291f48e2df8SDarrick J. Wong /* Couldn't lock the AGF, so skip this AG. */ 3292f48e2df8SDarrick J. Wong if (error == -EAGAIN) { 329330f712c9SDave Chinner *notinit = 1; 3294f48e2df8SDarrick J. Wong error = 0; 3295f48e2df8SDarrick J. Wong } 329630f712c9SDave Chinner goto out; 329730f712c9SDave Chinner } 329830f712c9SDave Chinner } 329930f712c9SDave Chinner 3300a1f69417SEric Sandeen longest = xfs_alloc_longest_free_extent(pag, 33013fd129b6SDarrick J. Wong xfs_alloc_min_freelist(mp, pag), 33023fd129b6SDarrick J. Wong xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE)); 330330f712c9SDave Chinner if (*blen < longest) 330430f712c9SDave Chinner *blen = longest; 330530f712c9SDave Chinner 330630f712c9SDave Chinner out: 330730f712c9SDave Chinner xfs_perag_put(pag); 330830f712c9SDave Chinner return error; 330930f712c9SDave Chinner } 331030f712c9SDave Chinner 331130f712c9SDave Chinner static void 331230f712c9SDave Chinner xfs_bmap_select_minlen( 331330f712c9SDave Chinner struct xfs_bmalloca *ap, 331430f712c9SDave Chinner struct xfs_alloc_arg *args, 331530f712c9SDave Chinner xfs_extlen_t *blen, 331630f712c9SDave Chinner int notinit) 331730f712c9SDave Chinner { 331830f712c9SDave Chinner if (notinit || *blen < ap->minlen) { 331930f712c9SDave Chinner /* 332030f712c9SDave Chinner * Since we did a BUF_TRYLOCK above, it is possible that 332130f712c9SDave Chinner * there is space for this request. 332230f712c9SDave Chinner */ 332330f712c9SDave Chinner args->minlen = ap->minlen; 332430f712c9SDave Chinner } else if (*blen < args->maxlen) { 332530f712c9SDave Chinner /* 332630f712c9SDave Chinner * If the best seen length is less than the request length, 332730f712c9SDave Chinner * use the best as the minimum. 332830f712c9SDave Chinner */ 332930f712c9SDave Chinner args->minlen = *blen; 333030f712c9SDave Chinner } else { 333130f712c9SDave Chinner /* 333230f712c9SDave Chinner * Otherwise we've seen an extent as big as maxlen, use that 333330f712c9SDave Chinner * as the minimum. 333430f712c9SDave Chinner */ 333530f712c9SDave Chinner args->minlen = args->maxlen; 333630f712c9SDave Chinner } 333730f712c9SDave Chinner } 333830f712c9SDave Chinner 333930f712c9SDave Chinner STATIC int 334030f712c9SDave Chinner xfs_bmap_btalloc_nullfb( 334130f712c9SDave Chinner struct xfs_bmalloca *ap, 334230f712c9SDave Chinner struct xfs_alloc_arg *args, 334330f712c9SDave Chinner xfs_extlen_t *blen) 334430f712c9SDave Chinner { 334530f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 334630f712c9SDave Chinner xfs_agnumber_t ag, startag; 334730f712c9SDave Chinner int notinit = 0; 334830f712c9SDave Chinner int error; 334930f712c9SDave Chinner 335030f712c9SDave Chinner args->type = XFS_ALLOCTYPE_START_BNO; 335130f712c9SDave Chinner args->total = ap->total; 335230f712c9SDave Chinner 335330f712c9SDave Chinner startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 335430f712c9SDave Chinner if (startag == NULLAGNUMBER) 335530f712c9SDave Chinner startag = ag = 0; 335630f712c9SDave Chinner 335730f712c9SDave Chinner while (*blen < args->maxlen) { 335830f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 335930f712c9SDave Chinner ¬init); 336030f712c9SDave Chinner if (error) 336130f712c9SDave Chinner return error; 336230f712c9SDave Chinner 336330f712c9SDave Chinner if (++ag == mp->m_sb.sb_agcount) 336430f712c9SDave Chinner ag = 0; 336530f712c9SDave Chinner if (ag == startag) 336630f712c9SDave Chinner break; 336730f712c9SDave Chinner } 336830f712c9SDave Chinner 336930f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 337030f712c9SDave Chinner return 0; 337130f712c9SDave Chinner } 337230f712c9SDave Chinner 337330f712c9SDave Chinner STATIC int 337430f712c9SDave Chinner xfs_bmap_btalloc_filestreams( 337530f712c9SDave Chinner struct xfs_bmalloca *ap, 337630f712c9SDave Chinner struct xfs_alloc_arg *args, 337730f712c9SDave Chinner xfs_extlen_t *blen) 337830f712c9SDave Chinner { 337930f712c9SDave Chinner struct xfs_mount *mp = ap->ip->i_mount; 338030f712c9SDave Chinner xfs_agnumber_t ag; 338130f712c9SDave Chinner int notinit = 0; 338230f712c9SDave Chinner int error; 338330f712c9SDave Chinner 338430f712c9SDave Chinner args->type = XFS_ALLOCTYPE_NEAR_BNO; 338530f712c9SDave Chinner args->total = ap->total; 338630f712c9SDave Chinner 338730f712c9SDave Chinner ag = XFS_FSB_TO_AGNO(mp, args->fsbno); 338830f712c9SDave Chinner if (ag == NULLAGNUMBER) 338930f712c9SDave Chinner ag = 0; 339030f712c9SDave Chinner 339130f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); 339230f712c9SDave Chinner if (error) 339330f712c9SDave Chinner return error; 339430f712c9SDave Chinner 339530f712c9SDave Chinner if (*blen < args->maxlen) { 339630f712c9SDave Chinner error = xfs_filestream_new_ag(ap, &ag); 339730f712c9SDave Chinner if (error) 339830f712c9SDave Chinner return error; 339930f712c9SDave Chinner 340030f712c9SDave Chinner error = xfs_bmap_longest_free_extent(args->tp, ag, blen, 340130f712c9SDave Chinner ¬init); 340230f712c9SDave Chinner if (error) 340330f712c9SDave Chinner return error; 340430f712c9SDave Chinner 340530f712c9SDave Chinner } 340630f712c9SDave Chinner 340730f712c9SDave Chinner xfs_bmap_select_minlen(ap, args, blen, notinit); 340830f712c9SDave Chinner 340930f712c9SDave Chinner /* 341030f712c9SDave Chinner * Set the failure fallback case to look in the selected AG as stream 341130f712c9SDave Chinner * may have moved. 341230f712c9SDave Chinner */ 341330f712c9SDave Chinner ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); 341430f712c9SDave Chinner return 0; 341530f712c9SDave Chinner } 341630f712c9SDave Chinner 3417751f3767SDarrick J. Wong /* Update all inode and quota accounting for the allocation we just did. */ 3418751f3767SDarrick J. Wong static void 3419751f3767SDarrick J. Wong xfs_bmap_btalloc_accounting( 3420751f3767SDarrick J. Wong struct xfs_bmalloca *ap, 3421751f3767SDarrick J. Wong struct xfs_alloc_arg *args) 3422751f3767SDarrick J. Wong { 34234b4c1326SDarrick J. Wong if (ap->flags & XFS_BMAPI_COWFORK) { 34244b4c1326SDarrick J. Wong /* 34254b4c1326SDarrick J. Wong * COW fork blocks are in-core only and thus are treated as 34264b4c1326SDarrick J. Wong * in-core quota reservation (like delalloc blocks) even when 34274b4c1326SDarrick J. Wong * converted to real blocks. The quota reservation is not 34284b4c1326SDarrick J. Wong * accounted to disk until blocks are remapped to the data 34294b4c1326SDarrick J. Wong * fork. So if these blocks were previously delalloc, we 34304b4c1326SDarrick J. Wong * already have quota reservation and there's nothing to do 34314b4c1326SDarrick J. Wong * yet. 34324b4c1326SDarrick J. Wong */ 34339fe82b8cSDarrick J. Wong if (ap->wasdel) { 34349fe82b8cSDarrick J. Wong xfs_mod_delalloc(ap->ip->i_mount, -(int64_t)args->len); 34354b4c1326SDarrick J. Wong return; 34369fe82b8cSDarrick J. Wong } 34374b4c1326SDarrick J. Wong 34384b4c1326SDarrick J. Wong /* 34394b4c1326SDarrick J. Wong * Otherwise, we've allocated blocks in a hole. The transaction 34404b4c1326SDarrick J. Wong * has acquired in-core quota reservation for this extent. 34414b4c1326SDarrick J. Wong * Rather than account these as real blocks, however, we reduce 34424b4c1326SDarrick J. Wong * the transaction quota reservation based on the allocation. 34434b4c1326SDarrick J. Wong * This essentially transfers the transaction quota reservation 34444b4c1326SDarrick J. Wong * to that of a delalloc extent. 34454b4c1326SDarrick J. Wong */ 34464b4c1326SDarrick J. Wong ap->ip->i_delayed_blks += args->len; 34474b4c1326SDarrick J. Wong xfs_trans_mod_dquot_byino(ap->tp, ap->ip, XFS_TRANS_DQ_RES_BLKS, 34484b4c1326SDarrick J. Wong -(long)args->len); 34494b4c1326SDarrick J. Wong return; 34504b4c1326SDarrick J. Wong } 34514b4c1326SDarrick J. Wong 34524b4c1326SDarrick J. Wong /* data/attr fork only */ 34536e73a545SChristoph Hellwig ap->ip->i_nblocks += args->len; 3454751f3767SDarrick J. Wong xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); 34559fe82b8cSDarrick J. Wong if (ap->wasdel) { 3456751f3767SDarrick J. Wong ap->ip->i_delayed_blks -= args->len; 34579fe82b8cSDarrick J. Wong xfs_mod_delalloc(ap->ip->i_mount, -(int64_t)args->len); 34589fe82b8cSDarrick J. Wong } 3459751f3767SDarrick J. Wong xfs_trans_mod_dquot_byino(ap->tp, ap->ip, 3460751f3767SDarrick J. Wong ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : XFS_TRANS_DQ_BCOUNT, 3461751f3767SDarrick J. Wong args->len); 3462751f3767SDarrick J. Wong } 3463751f3767SDarrick J. Wong 34640961fddfSChandan Babu R static int 34650961fddfSChandan Babu R xfs_bmap_compute_alignments( 34660961fddfSChandan Babu R struct xfs_bmalloca *ap, 34670961fddfSChandan Babu R struct xfs_alloc_arg *args) 34680961fddfSChandan Babu R { 34690961fddfSChandan Babu R struct xfs_mount *mp = args->mp; 34700961fddfSChandan Babu R xfs_extlen_t align = 0; /* minimum allocation alignment */ 34710961fddfSChandan Babu R int stripe_align = 0; 34720961fddfSChandan Babu R 34730961fddfSChandan Babu R /* stripe alignment for allocation is determined by mount parameters */ 34740961fddfSChandan Babu R if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) 34750961fddfSChandan Babu R stripe_align = mp->m_swidth; 34760961fddfSChandan Babu R else if (mp->m_dalign) 34770961fddfSChandan Babu R stripe_align = mp->m_dalign; 34780961fddfSChandan Babu R 34790961fddfSChandan Babu R if (ap->flags & XFS_BMAPI_COWFORK) 34800961fddfSChandan Babu R align = xfs_get_cowextsz_hint(ap->ip); 34810961fddfSChandan Babu R else if (ap->datatype & XFS_ALLOC_USERDATA) 34820961fddfSChandan Babu R align = xfs_get_extsz_hint(ap->ip); 34830961fddfSChandan Babu R if (align) { 3484560ab6c0SChandan Babu R if (xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, align, 0, 3485560ab6c0SChandan Babu R ap->eof, 0, ap->conv, &ap->offset, 3486560ab6c0SChandan Babu R &ap->length)) 3487560ab6c0SChandan Babu R ASSERT(0); 34880961fddfSChandan Babu R ASSERT(ap->length); 34890961fddfSChandan Babu R } 34900961fddfSChandan Babu R 34910961fddfSChandan Babu R /* apply extent size hints if obtained earlier */ 34920961fddfSChandan Babu R if (align) { 34930961fddfSChandan Babu R args->prod = align; 34940961fddfSChandan Babu R div_u64_rem(ap->offset, args->prod, &args->mod); 34950961fddfSChandan Babu R if (args->mod) 34960961fddfSChandan Babu R args->mod = args->prod - args->mod; 34970961fddfSChandan Babu R } else if (mp->m_sb.sb_blocksize >= PAGE_SIZE) { 34980961fddfSChandan Babu R args->prod = 1; 34990961fddfSChandan Babu R args->mod = 0; 35000961fddfSChandan Babu R } else { 35010961fddfSChandan Babu R args->prod = PAGE_SIZE >> mp->m_sb.sb_blocklog; 35020961fddfSChandan Babu R div_u64_rem(ap->offset, args->prod, &args->mod); 35030961fddfSChandan Babu R if (args->mod) 35040961fddfSChandan Babu R args->mod = args->prod - args->mod; 35050961fddfSChandan Babu R } 35060961fddfSChandan Babu R 35070961fddfSChandan Babu R return stripe_align; 35080961fddfSChandan Babu R } 35090961fddfSChandan Babu R 351007c72e55SChandan Babu R static void 351107c72e55SChandan Babu R xfs_bmap_process_allocated_extent( 351207c72e55SChandan Babu R struct xfs_bmalloca *ap, 351307c72e55SChandan Babu R struct xfs_alloc_arg *args, 351407c72e55SChandan Babu R xfs_fileoff_t orig_offset, 351507c72e55SChandan Babu R xfs_extlen_t orig_length) 351607c72e55SChandan Babu R { 351707c72e55SChandan Babu R int nullfb; 351807c72e55SChandan Babu R 351907c72e55SChandan Babu R nullfb = ap->tp->t_firstblock == NULLFSBLOCK; 352007c72e55SChandan Babu R 352107c72e55SChandan Babu R /* 352207c72e55SChandan Babu R * check the allocation happened at the same or higher AG than 352307c72e55SChandan Babu R * the first block that was allocated. 352407c72e55SChandan Babu R */ 352507c72e55SChandan Babu R ASSERT(nullfb || 352607c72e55SChandan Babu R XFS_FSB_TO_AGNO(args->mp, ap->tp->t_firstblock) <= 352707c72e55SChandan Babu R XFS_FSB_TO_AGNO(args->mp, args->fsbno)); 352807c72e55SChandan Babu R 352907c72e55SChandan Babu R ap->blkno = args->fsbno; 353007c72e55SChandan Babu R if (nullfb) 353107c72e55SChandan Babu R ap->tp->t_firstblock = args->fsbno; 353207c72e55SChandan Babu R ap->length = args->len; 353307c72e55SChandan Babu R /* 353407c72e55SChandan Babu R * If the extent size hint is active, we tried to round the 353507c72e55SChandan Babu R * caller's allocation request offset down to extsz and the 353607c72e55SChandan Babu R * length up to another extsz boundary. If we found a free 353707c72e55SChandan Babu R * extent we mapped it in starting at this new offset. If the 353807c72e55SChandan Babu R * newly mapped space isn't long enough to cover any of the 353907c72e55SChandan Babu R * range of offsets that was originally requested, move the 354007c72e55SChandan Babu R * mapping up so that we can fill as much of the caller's 354107c72e55SChandan Babu R * original request as possible. Free space is apparently 354207c72e55SChandan Babu R * very fragmented so we're unlikely to be able to satisfy the 354307c72e55SChandan Babu R * hints anyway. 354407c72e55SChandan Babu R */ 354507c72e55SChandan Babu R if (ap->length <= orig_length) 354607c72e55SChandan Babu R ap->offset = orig_offset; 354707c72e55SChandan Babu R else if (ap->offset + ap->length < orig_offset + orig_length) 354807c72e55SChandan Babu R ap->offset = orig_offset + orig_length - ap->length; 354907c72e55SChandan Babu R xfs_bmap_btalloc_accounting(ap, args); 355007c72e55SChandan Babu R } 355107c72e55SChandan Babu R 355230151967SChandan Babu R #ifdef DEBUG 355330151967SChandan Babu R static int 355430151967SChandan Babu R xfs_bmap_exact_minlen_extent_alloc( 355530151967SChandan Babu R struct xfs_bmalloca *ap) 355630151967SChandan Babu R { 355730151967SChandan Babu R struct xfs_mount *mp = ap->ip->i_mount; 355830151967SChandan Babu R struct xfs_alloc_arg args = { .tp = ap->tp, .mp = mp }; 355930151967SChandan Babu R xfs_fileoff_t orig_offset; 356030151967SChandan Babu R xfs_extlen_t orig_length; 356130151967SChandan Babu R int error; 356230151967SChandan Babu R 356330151967SChandan Babu R ASSERT(ap->length); 356430151967SChandan Babu R 356530151967SChandan Babu R if (ap->minlen != 1) { 356630151967SChandan Babu R ap->blkno = NULLFSBLOCK; 356730151967SChandan Babu R ap->length = 0; 356830151967SChandan Babu R return 0; 356930151967SChandan Babu R } 357030151967SChandan Babu R 357130151967SChandan Babu R orig_offset = ap->offset; 357230151967SChandan Babu R orig_length = ap->length; 357330151967SChandan Babu R 357430151967SChandan Babu R args.alloc_minlen_only = 1; 357530151967SChandan Babu R 357630151967SChandan Babu R xfs_bmap_compute_alignments(ap, &args); 357730151967SChandan Babu R 357830151967SChandan Babu R if (ap->tp->t_firstblock == NULLFSBLOCK) { 357930151967SChandan Babu R /* 358030151967SChandan Babu R * Unlike the longest extent available in an AG, we don't track 358130151967SChandan Babu R * the length of an AG's shortest extent. 358230151967SChandan Babu R * XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT is a debug only knob and 358330151967SChandan Babu R * hence we can afford to start traversing from the 0th AG since 358430151967SChandan Babu R * we need not be concerned about a drop in performance in 358530151967SChandan Babu R * "debug only" code paths. 358630151967SChandan Babu R */ 358730151967SChandan Babu R ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0); 358830151967SChandan Babu R } else { 358930151967SChandan Babu R ap->blkno = ap->tp->t_firstblock; 359030151967SChandan Babu R } 359130151967SChandan Babu R 359230151967SChandan Babu R args.fsbno = ap->blkno; 359330151967SChandan Babu R args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; 359430151967SChandan Babu R args.type = XFS_ALLOCTYPE_FIRST_AG; 35956e8bd39dSChandan Babu R args.minlen = args.maxlen = ap->minlen; 35966e8bd39dSChandan Babu R args.total = ap->total; 359730151967SChandan Babu R 359830151967SChandan Babu R args.alignment = 1; 359930151967SChandan Babu R args.minalignslop = 0; 360030151967SChandan Babu R 360130151967SChandan Babu R args.minleft = ap->minleft; 360230151967SChandan Babu R args.wasdel = ap->wasdel; 360330151967SChandan Babu R args.resv = XFS_AG_RESV_NONE; 360430151967SChandan Babu R args.datatype = ap->datatype; 360530151967SChandan Babu R 360630151967SChandan Babu R error = xfs_alloc_vextent(&args); 360730151967SChandan Babu R if (error) 360830151967SChandan Babu R return error; 360930151967SChandan Babu R 361030151967SChandan Babu R if (args.fsbno != NULLFSBLOCK) { 361130151967SChandan Babu R xfs_bmap_process_allocated_extent(ap, &args, orig_offset, 361230151967SChandan Babu R orig_length); 361330151967SChandan Babu R } else { 361430151967SChandan Babu R ap->blkno = NULLFSBLOCK; 361530151967SChandan Babu R ap->length = 0; 361630151967SChandan Babu R } 361730151967SChandan Babu R 361830151967SChandan Babu R return 0; 361930151967SChandan Babu R } 362030151967SChandan Babu R #else 362130151967SChandan Babu R 362230151967SChandan Babu R #define xfs_bmap_exact_minlen_extent_alloc(bma) (-EFSCORRUPTED) 362330151967SChandan Babu R 362430151967SChandan Babu R #endif 362530151967SChandan Babu R 362630f712c9SDave Chinner STATIC int 362730f712c9SDave Chinner xfs_bmap_btalloc( 362830151967SChandan Babu R struct xfs_bmalloca *ap) 362930f712c9SDave Chinner { 363030151967SChandan Babu R struct xfs_mount *mp = ap->ip->i_mount; 363130151967SChandan Babu R struct xfs_alloc_arg args = { .tp = ap->tp, .mp = mp }; 363230151967SChandan Babu R xfs_alloctype_t atype = 0; 363330f712c9SDave Chinner xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ 363430f712c9SDave Chinner xfs_agnumber_t ag; 36356d8a45ceSDarrick J. Wong xfs_fileoff_t orig_offset; 36366d8a45ceSDarrick J. Wong xfs_extlen_t orig_length; 363730f712c9SDave Chinner xfs_extlen_t blen; 363830f712c9SDave Chinner xfs_extlen_t nextminlen = 0; 363930f712c9SDave Chinner int nullfb; /* true if ap->firstblock isn't set */ 364030f712c9SDave Chinner int isaligned; 364130f712c9SDave Chinner int tryagain; 364230f712c9SDave Chinner int error; 364330f712c9SDave Chinner int stripe_align; 364430f712c9SDave Chinner 364530f712c9SDave Chinner ASSERT(ap->length); 36466d8a45ceSDarrick J. Wong orig_offset = ap->offset; 36476d8a45ceSDarrick J. Wong orig_length = ap->length; 364830f712c9SDave Chinner 36490961fddfSChandan Babu R stripe_align = xfs_bmap_compute_alignments(ap, &args); 365030f712c9SDave Chinner 365194c07b4dSBrian Foster nullfb = ap->tp->t_firstblock == NULLFSBLOCK; 365294c07b4dSBrian Foster fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, 365394c07b4dSBrian Foster ap->tp->t_firstblock); 365430f712c9SDave Chinner if (nullfb) { 3655c34d570dSChristoph Hellwig if ((ap->datatype & XFS_ALLOC_USERDATA) && 3656292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) { 365730f712c9SDave Chinner ag = xfs_filestream_lookup_ag(ap->ip); 365830f712c9SDave Chinner ag = (ag != NULLAGNUMBER) ? ag : 0; 365930f712c9SDave Chinner ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); 366030f712c9SDave Chinner } else { 366130f712c9SDave Chinner ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); 366230f712c9SDave Chinner } 366330f712c9SDave Chinner } else 366494c07b4dSBrian Foster ap->blkno = ap->tp->t_firstblock; 366530f712c9SDave Chinner 366630f712c9SDave Chinner xfs_bmap_adjacent(ap); 366730f712c9SDave Chinner 366830f712c9SDave Chinner /* 366930f712c9SDave Chinner * If allowed, use ap->blkno; otherwise must use firstblock since 367030f712c9SDave Chinner * it's in the right allocation group. 367130f712c9SDave Chinner */ 367230f712c9SDave Chinner if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) 367330f712c9SDave Chinner ; 367430f712c9SDave Chinner else 367594c07b4dSBrian Foster ap->blkno = ap->tp->t_firstblock; 367630f712c9SDave Chinner /* 367730f712c9SDave Chinner * Normal allocation, done through xfs_alloc_vextent. 367830f712c9SDave Chinner */ 367930f712c9SDave Chinner tryagain = isaligned = 0; 368030f712c9SDave Chinner args.fsbno = ap->blkno; 36817280fedaSDarrick J. Wong args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; 368230f712c9SDave Chinner 368330f712c9SDave Chinner /* Trim the allocation back to the maximum an AG can fit. */ 36849bb54cb5SDave Chinner args.maxlen = min(ap->length, mp->m_ag_max_usable); 368530f712c9SDave Chinner blen = 0; 368630f712c9SDave Chinner if (nullfb) { 368730f712c9SDave Chinner /* 368830f712c9SDave Chinner * Search for an allocation group with a single extent large 368930f712c9SDave Chinner * enough for the request. If one isn't found, then adjust 369030f712c9SDave Chinner * the minimum allocation size to the largest space found. 369130f712c9SDave Chinner */ 3692c34d570dSChristoph Hellwig if ((ap->datatype & XFS_ALLOC_USERDATA) && 3693292378edSDave Chinner xfs_inode_is_filestream(ap->ip)) 369430f712c9SDave Chinner error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); 369530f712c9SDave Chinner else 369630f712c9SDave Chinner error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); 369730f712c9SDave Chinner if (error) 369830f712c9SDave Chinner return error; 36991214f1cfSBrian Foster } else if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { 370030f712c9SDave Chinner if (xfs_inode_is_filestream(ap->ip)) 370130f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 370230f712c9SDave Chinner else 370330f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 370430f712c9SDave Chinner args.total = args.minlen = ap->minlen; 370530f712c9SDave Chinner } else { 370630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_NEAR_BNO; 370730f712c9SDave Chinner args.total = ap->total; 370830f712c9SDave Chinner args.minlen = ap->minlen; 370930f712c9SDave Chinner } 37100961fddfSChandan Babu R 371130f712c9SDave Chinner /* 37121c743574SDave Chinner * If we are not low on available data blocks, and the underlying 37131c743574SDave Chinner * logical volume manager is a stripe, and the file offset is zero then 37141c743574SDave Chinner * try to allocate data blocks on stripe unit boundary. NOTE: ap->aeof 37151c743574SDave Chinner * is only set if the allocation length is >= the stripe unit and the 37161c743574SDave Chinner * allocation offset is at the end of file. 371730f712c9SDave Chinner */ 37181214f1cfSBrian Foster if (!(ap->tp->t_flags & XFS_TRANS_LOWMODE) && ap->aeof) { 371930f712c9SDave Chinner if (!ap->offset) { 372030f712c9SDave Chinner args.alignment = stripe_align; 372130f712c9SDave Chinner atype = args.type; 372230f712c9SDave Chinner isaligned = 1; 372330f712c9SDave Chinner /* 37241c743574SDave Chinner * Adjust minlen to try and preserve alignment if we 37251c743574SDave Chinner * can't guarantee an aligned maxlen extent. 372630f712c9SDave Chinner */ 37271c743574SDave Chinner if (blen > args.alignment && 37281c743574SDave Chinner blen <= args.maxlen + args.alignment) 372930f712c9SDave Chinner args.minlen = blen - args.alignment; 373030f712c9SDave Chinner args.minalignslop = 0; 373130f712c9SDave Chinner } else { 373230f712c9SDave Chinner /* 373330f712c9SDave Chinner * First try an exact bno allocation. 373430f712c9SDave Chinner * If it fails then do a near or start bno 373530f712c9SDave Chinner * allocation with alignment turned on. 373630f712c9SDave Chinner */ 373730f712c9SDave Chinner atype = args.type; 373830f712c9SDave Chinner tryagain = 1; 373930f712c9SDave Chinner args.type = XFS_ALLOCTYPE_THIS_BNO; 374030f712c9SDave Chinner args.alignment = 1; 374130f712c9SDave Chinner /* 374230f712c9SDave Chinner * Compute the minlen+alignment for the 374330f712c9SDave Chinner * next case. Set slop so that the value 374430f712c9SDave Chinner * of minlen+alignment+slop doesn't go up 374530f712c9SDave Chinner * between the calls. 374630f712c9SDave Chinner */ 374730f712c9SDave Chinner if (blen > stripe_align && blen <= args.maxlen) 374830f712c9SDave Chinner nextminlen = blen - stripe_align; 374930f712c9SDave Chinner else 375030f712c9SDave Chinner nextminlen = args.minlen; 375130f712c9SDave Chinner if (nextminlen + stripe_align > args.minlen + 1) 375230f712c9SDave Chinner args.minalignslop = 375330f712c9SDave Chinner nextminlen + stripe_align - 375430f712c9SDave Chinner args.minlen - 1; 375530f712c9SDave Chinner else 375630f712c9SDave Chinner args.minalignslop = 0; 375730f712c9SDave Chinner } 375830f712c9SDave Chinner } else { 375930f712c9SDave Chinner args.alignment = 1; 376030f712c9SDave Chinner args.minalignslop = 0; 376130f712c9SDave Chinner } 376230f712c9SDave Chinner args.minleft = ap->minleft; 376330f712c9SDave Chinner args.wasdel = ap->wasdel; 37643fd129b6SDarrick J. Wong args.resv = XFS_AG_RESV_NONE; 3765292378edSDave Chinner args.datatype = ap->datatype; 37663fbbbea3SDave Chinner 37673fbbbea3SDave Chinner error = xfs_alloc_vextent(&args); 37683fbbbea3SDave Chinner if (error) 376930f712c9SDave Chinner return error; 37703fbbbea3SDave Chinner 377130f712c9SDave Chinner if (tryagain && args.fsbno == NULLFSBLOCK) { 377230f712c9SDave Chinner /* 377330f712c9SDave Chinner * Exact allocation failed. Now try with alignment 377430f712c9SDave Chinner * turned on. 377530f712c9SDave Chinner */ 377630f712c9SDave Chinner args.type = atype; 377730f712c9SDave Chinner args.fsbno = ap->blkno; 377830f712c9SDave Chinner args.alignment = stripe_align; 377930f712c9SDave Chinner args.minlen = nextminlen; 378030f712c9SDave Chinner args.minalignslop = 0; 378130f712c9SDave Chinner isaligned = 1; 378230f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 378330f712c9SDave Chinner return error; 378430f712c9SDave Chinner } 378530f712c9SDave Chinner if (isaligned && args.fsbno == NULLFSBLOCK) { 378630f712c9SDave Chinner /* 378730f712c9SDave Chinner * allocation failed, so turn off alignment and 378830f712c9SDave Chinner * try again. 378930f712c9SDave Chinner */ 379030f712c9SDave Chinner args.type = atype; 379130f712c9SDave Chinner args.fsbno = ap->blkno; 379230f712c9SDave Chinner args.alignment = 0; 379330f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 379430f712c9SDave Chinner return error; 379530f712c9SDave Chinner } 379630f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb && 379730f712c9SDave Chinner args.minlen > ap->minlen) { 379830f712c9SDave Chinner args.minlen = ap->minlen; 379930f712c9SDave Chinner args.type = XFS_ALLOCTYPE_START_BNO; 380030f712c9SDave Chinner args.fsbno = ap->blkno; 380130f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 380230f712c9SDave Chinner return error; 380330f712c9SDave Chinner } 380430f712c9SDave Chinner if (args.fsbno == NULLFSBLOCK && nullfb) { 380530f712c9SDave Chinner args.fsbno = 0; 380630f712c9SDave Chinner args.type = XFS_ALLOCTYPE_FIRST_AG; 380730f712c9SDave Chinner args.total = ap->minlen; 380830f712c9SDave Chinner if ((error = xfs_alloc_vextent(&args))) 380930f712c9SDave Chinner return error; 38101214f1cfSBrian Foster ap->tp->t_flags |= XFS_TRANS_LOWMODE; 381130f712c9SDave Chinner } 381230f712c9SDave Chinner 381307c72e55SChandan Babu R if (args.fsbno != NULLFSBLOCK) { 381407c72e55SChandan Babu R xfs_bmap_process_allocated_extent(ap, &args, orig_offset, 381507c72e55SChandan Babu R orig_length); 381630f712c9SDave Chinner } else { 381730f712c9SDave Chinner ap->blkno = NULLFSBLOCK; 381830f712c9SDave Chinner ap->length = 0; 381930f712c9SDave Chinner } 382030f712c9SDave Chinner return 0; 382130f712c9SDave Chinner } 382230f712c9SDave Chinner 38230a0af28cSDarrick J. Wong /* Trim extent to fit a logical block range. */ 38240a0af28cSDarrick J. Wong void 38250a0af28cSDarrick J. Wong xfs_trim_extent( 38260a0af28cSDarrick J. Wong struct xfs_bmbt_irec *irec, 38270a0af28cSDarrick J. Wong xfs_fileoff_t bno, 38280a0af28cSDarrick J. Wong xfs_filblks_t len) 38290a0af28cSDarrick J. Wong { 38300a0af28cSDarrick J. Wong xfs_fileoff_t distance; 38310a0af28cSDarrick J. Wong xfs_fileoff_t end = bno + len; 38320a0af28cSDarrick J. Wong 38330a0af28cSDarrick J. Wong if (irec->br_startoff + irec->br_blockcount <= bno || 38340a0af28cSDarrick J. Wong irec->br_startoff >= end) { 38350a0af28cSDarrick J. Wong irec->br_blockcount = 0; 38360a0af28cSDarrick J. Wong return; 38370a0af28cSDarrick J. Wong } 38380a0af28cSDarrick J. Wong 38390a0af28cSDarrick J. Wong if (irec->br_startoff < bno) { 38400a0af28cSDarrick J. Wong distance = bno - irec->br_startoff; 38410a0af28cSDarrick J. Wong if (isnullstartblock(irec->br_startblock)) 38420a0af28cSDarrick J. Wong irec->br_startblock = DELAYSTARTBLOCK; 38430a0af28cSDarrick J. Wong if (irec->br_startblock != DELAYSTARTBLOCK && 38440a0af28cSDarrick J. Wong irec->br_startblock != HOLESTARTBLOCK) 38450a0af28cSDarrick J. Wong irec->br_startblock += distance; 38460a0af28cSDarrick J. Wong irec->br_startoff += distance; 38470a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 38480a0af28cSDarrick J. Wong } 38490a0af28cSDarrick J. Wong 38500a0af28cSDarrick J. Wong if (end < irec->br_startoff + irec->br_blockcount) { 38510a0af28cSDarrick J. Wong distance = irec->br_startoff + irec->br_blockcount - end; 38520a0af28cSDarrick J. Wong irec->br_blockcount -= distance; 38530a0af28cSDarrick J. Wong } 38540a0af28cSDarrick J. Wong } 38550a0af28cSDarrick J. Wong 385630f712c9SDave Chinner /* 385730f712c9SDave Chinner * Trim the returned map to the required bounds 385830f712c9SDave Chinner */ 385930f712c9SDave Chinner STATIC void 386030f712c9SDave Chinner xfs_bmapi_trim_map( 386130f712c9SDave Chinner struct xfs_bmbt_irec *mval, 386230f712c9SDave Chinner struct xfs_bmbt_irec *got, 386330f712c9SDave Chinner xfs_fileoff_t *bno, 386430f712c9SDave Chinner xfs_filblks_t len, 386530f712c9SDave Chinner xfs_fileoff_t obno, 386630f712c9SDave Chinner xfs_fileoff_t end, 386730f712c9SDave Chinner int n, 386830f712c9SDave Chinner int flags) 386930f712c9SDave Chinner { 387030f712c9SDave Chinner if ((flags & XFS_BMAPI_ENTIRE) || 387130f712c9SDave Chinner got->br_startoff + got->br_blockcount <= obno) { 387230f712c9SDave Chinner *mval = *got; 387330f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 387430f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 387530f712c9SDave Chinner return; 387630f712c9SDave Chinner } 387730f712c9SDave Chinner 387830f712c9SDave Chinner if (obno > *bno) 387930f712c9SDave Chinner *bno = obno; 388030f712c9SDave Chinner ASSERT((*bno >= obno) || (n == 0)); 388130f712c9SDave Chinner ASSERT(*bno < end); 388230f712c9SDave Chinner mval->br_startoff = *bno; 388330f712c9SDave Chinner if (isnullstartblock(got->br_startblock)) 388430f712c9SDave Chinner mval->br_startblock = DELAYSTARTBLOCK; 388530f712c9SDave Chinner else 388630f712c9SDave Chinner mval->br_startblock = got->br_startblock + 388730f712c9SDave Chinner (*bno - got->br_startoff); 388830f712c9SDave Chinner /* 388930f712c9SDave Chinner * Return the minimum of what we got and what we asked for for 389030f712c9SDave Chinner * the length. We can use the len variable here because it is 389130f712c9SDave Chinner * modified below and we could have been there before coming 389230f712c9SDave Chinner * here if the first part of the allocation didn't overlap what 389330f712c9SDave Chinner * was asked for. 389430f712c9SDave Chinner */ 389530f712c9SDave Chinner mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, 389630f712c9SDave Chinner got->br_blockcount - (*bno - got->br_startoff)); 389730f712c9SDave Chinner mval->br_state = got->br_state; 389830f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 389930f712c9SDave Chinner return; 390030f712c9SDave Chinner } 390130f712c9SDave Chinner 390230f712c9SDave Chinner /* 390330f712c9SDave Chinner * Update and validate the extent map to return 390430f712c9SDave Chinner */ 390530f712c9SDave Chinner STATIC void 390630f712c9SDave Chinner xfs_bmapi_update_map( 390730f712c9SDave Chinner struct xfs_bmbt_irec **map, 390830f712c9SDave Chinner xfs_fileoff_t *bno, 390930f712c9SDave Chinner xfs_filblks_t *len, 391030f712c9SDave Chinner xfs_fileoff_t obno, 391130f712c9SDave Chinner xfs_fileoff_t end, 391230f712c9SDave Chinner int *n, 391330f712c9SDave Chinner int flags) 391430f712c9SDave Chinner { 391530f712c9SDave Chinner xfs_bmbt_irec_t *mval = *map; 391630f712c9SDave Chinner 391730f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || 391830f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= end)); 391930f712c9SDave Chinner ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || 392030f712c9SDave Chinner (mval->br_startoff < obno)); 392130f712c9SDave Chinner 392230f712c9SDave Chinner *bno = mval->br_startoff + mval->br_blockcount; 392330f712c9SDave Chinner *len = end - *bno; 392430f712c9SDave Chinner if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { 392530f712c9SDave Chinner /* update previous map with new information */ 392630f712c9SDave Chinner ASSERT(mval->br_startblock == mval[-1].br_startblock); 392730f712c9SDave Chinner ASSERT(mval->br_blockcount > mval[-1].br_blockcount); 392830f712c9SDave Chinner ASSERT(mval->br_state == mval[-1].br_state); 392930f712c9SDave Chinner mval[-1].br_blockcount = mval->br_blockcount; 393030f712c9SDave Chinner mval[-1].br_state = mval->br_state; 393130f712c9SDave Chinner } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && 393230f712c9SDave Chinner mval[-1].br_startblock != DELAYSTARTBLOCK && 393330f712c9SDave Chinner mval[-1].br_startblock != HOLESTARTBLOCK && 393430f712c9SDave Chinner mval->br_startblock == mval[-1].br_startblock + 393530f712c9SDave Chinner mval[-1].br_blockcount && 3936c3a2f9ffSChristoph Hellwig mval[-1].br_state == mval->br_state) { 393730f712c9SDave Chinner ASSERT(mval->br_startoff == 393830f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount); 393930f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 394030f712c9SDave Chinner } else if (*n > 0 && 394130f712c9SDave Chinner mval->br_startblock == DELAYSTARTBLOCK && 394230f712c9SDave Chinner mval[-1].br_startblock == DELAYSTARTBLOCK && 394330f712c9SDave Chinner mval->br_startoff == 394430f712c9SDave Chinner mval[-1].br_startoff + mval[-1].br_blockcount) { 394530f712c9SDave Chinner mval[-1].br_blockcount += mval->br_blockcount; 394630f712c9SDave Chinner mval[-1].br_state = mval->br_state; 394730f712c9SDave Chinner } else if (!((*n == 0) && 394830f712c9SDave Chinner ((mval->br_startoff + mval->br_blockcount) <= 394930f712c9SDave Chinner obno))) { 395030f712c9SDave Chinner mval++; 395130f712c9SDave Chinner (*n)++; 395230f712c9SDave Chinner } 395330f712c9SDave Chinner *map = mval; 395430f712c9SDave Chinner } 395530f712c9SDave Chinner 395630f712c9SDave Chinner /* 395730f712c9SDave Chinner * Map file blocks to filesystem blocks without allocation. 395830f712c9SDave Chinner */ 395930f712c9SDave Chinner int 396030f712c9SDave Chinner xfs_bmapi_read( 396130f712c9SDave Chinner struct xfs_inode *ip, 396230f712c9SDave Chinner xfs_fileoff_t bno, 396330f712c9SDave Chinner xfs_filblks_t len, 396430f712c9SDave Chinner struct xfs_bmbt_irec *mval, 396530f712c9SDave Chinner int *nmap, 396630f712c9SDave Chinner int flags) 396730f712c9SDave Chinner { 396830f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 39694b516ff4SChristoph Hellwig int whichfork = xfs_bmapi_whichfork(flags); 39704b516ff4SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 397130f712c9SDave Chinner struct xfs_bmbt_irec got; 397230f712c9SDave Chinner xfs_fileoff_t obno; 397330f712c9SDave Chinner xfs_fileoff_t end; 3974b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 397530f712c9SDave Chinner int error; 3976334f3423SChristoph Hellwig bool eof = false; 397730f712c9SDave Chinner int n = 0; 397830f712c9SDave Chinner 397930f712c9SDave Chinner ASSERT(*nmap >= 1); 39801a1c57b2SChristoph Hellwig ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK | XFS_BMAPI_ENTIRE))); 398130f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); 398230f712c9SDave Chinner 39834b516ff4SChristoph Hellwig if (WARN_ON_ONCE(!ifp)) 39844b516ff4SChristoph Hellwig return -EFSCORRUPTED; 39854b516ff4SChristoph Hellwig 3986f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp)) || 3987f7e67b20SChristoph Hellwig XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BMAPIFORMAT)) 39882451337dSDave Chinner return -EFSCORRUPTED; 398930f712c9SDave Chinner 399030f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 39912451337dSDave Chinner return -EIO; 399230f712c9SDave Chinner 3993ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapr); 399430f712c9SDave Chinner 399530f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 399630f712c9SDave Chinner error = xfs_iread_extents(NULL, ip, whichfork); 399730f712c9SDave Chinner if (error) 399830f712c9SDave Chinner return error; 399930f712c9SDave Chinner } 400030f712c9SDave Chinner 4001b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &icur, &got)) 4002334f3423SChristoph Hellwig eof = true; 400330f712c9SDave Chinner end = bno + len; 400430f712c9SDave Chinner obno = bno; 400530f712c9SDave Chinner 400630f712c9SDave Chinner while (bno < end && n < *nmap) { 400730f712c9SDave Chinner /* Reading past eof, act as though there's a hole up to end. */ 400830f712c9SDave Chinner if (eof) 400930f712c9SDave Chinner got.br_startoff = end; 401030f712c9SDave Chinner if (got.br_startoff > bno) { 401130f712c9SDave Chinner /* Reading in a hole. */ 401230f712c9SDave Chinner mval->br_startoff = bno; 401330f712c9SDave Chinner mval->br_startblock = HOLESTARTBLOCK; 401430f712c9SDave Chinner mval->br_blockcount = 401530f712c9SDave Chinner XFS_FILBLKS_MIN(len, got.br_startoff - bno); 401630f712c9SDave Chinner mval->br_state = XFS_EXT_NORM; 401730f712c9SDave Chinner bno += mval->br_blockcount; 401830f712c9SDave Chinner len -= mval->br_blockcount; 401930f712c9SDave Chinner mval++; 402030f712c9SDave Chinner n++; 402130f712c9SDave Chinner continue; 402230f712c9SDave Chinner } 402330f712c9SDave Chinner 402430f712c9SDave Chinner /* set up the extent map to return. */ 402530f712c9SDave Chinner xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); 402630f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 402730f712c9SDave Chinner 402830f712c9SDave Chinner /* If we're done, stop now. */ 402930f712c9SDave Chinner if (bno >= end || n >= *nmap) 403030f712c9SDave Chinner break; 403130f712c9SDave Chinner 403230f712c9SDave Chinner /* Else go on to the next record. */ 4033b2b1712aSChristoph Hellwig if (!xfs_iext_next_extent(ifp, &icur, &got)) 4034334f3423SChristoph Hellwig eof = true; 403530f712c9SDave Chinner } 403630f712c9SDave Chinner *nmap = n; 403730f712c9SDave Chinner return 0; 403830f712c9SDave Chinner } 403930f712c9SDave Chinner 4040f65e6fadSBrian Foster /* 4041f65e6fadSBrian Foster * Add a delayed allocation extent to an inode. Blocks are reserved from the 4042f65e6fadSBrian Foster * global pool and the extent inserted into the inode in-core extent tree. 4043f65e6fadSBrian Foster * 4044f65e6fadSBrian Foster * On entry, got refers to the first extent beyond the offset of the extent to 4045f65e6fadSBrian Foster * allocate or eof is specified if no such extent exists. On return, got refers 4046f65e6fadSBrian Foster * to the extent record that was inserted to the inode fork. 4047f65e6fadSBrian Foster * 4048f65e6fadSBrian Foster * Note that the allocated extent may have been merged with contiguous extents 4049f65e6fadSBrian Foster * during insertion into the inode fork. Thus, got does not reflect the current 4050f65e6fadSBrian Foster * state of the inode fork on return. If necessary, the caller can use lastx to 4051f65e6fadSBrian Foster * look up the updated record in the inode fork. 4052f65e6fadSBrian Foster */ 405351446f5bSChristoph Hellwig int 405430f712c9SDave Chinner xfs_bmapi_reserve_delalloc( 405530f712c9SDave Chinner struct xfs_inode *ip, 4056be51f811SDarrick J. Wong int whichfork, 4057974ae922SBrian Foster xfs_fileoff_t off, 405830f712c9SDave Chinner xfs_filblks_t len, 4059974ae922SBrian Foster xfs_filblks_t prealloc, 406030f712c9SDave Chinner struct xfs_bmbt_irec *got, 4061b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 406230f712c9SDave Chinner int eof) 406330f712c9SDave Chinner { 406430f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 4065be51f811SDarrick J. Wong struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 406630f712c9SDave Chinner xfs_extlen_t alen; 406730f712c9SDave Chinner xfs_extlen_t indlen; 406830f712c9SDave Chinner int error; 4069974ae922SBrian Foster xfs_fileoff_t aoff = off; 407030f712c9SDave Chinner 4071974ae922SBrian Foster /* 4072974ae922SBrian Foster * Cap the alloc length. Keep track of prealloc so we know whether to 4073974ae922SBrian Foster * tag the inode before we return. 4074974ae922SBrian Foster */ 4075974ae922SBrian Foster alen = XFS_FILBLKS_MIN(len + prealloc, MAXEXTLEN); 407630f712c9SDave Chinner if (!eof) 407730f712c9SDave Chinner alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); 4078974ae922SBrian Foster if (prealloc && alen >= len) 4079974ae922SBrian Foster prealloc = alen - len; 408030f712c9SDave Chinner 408130f712c9SDave Chinner /* Figure out the extent size, adjust alen */ 40826ca30729SShan Hai if (whichfork == XFS_COW_FORK) { 408365c5f419SChristoph Hellwig struct xfs_bmbt_irec prev; 40846ca30729SShan Hai xfs_extlen_t extsz = xfs_get_cowextsz_hint(ip); 408565c5f419SChristoph Hellwig 4086b2b1712aSChristoph Hellwig if (!xfs_iext_peek_prev_extent(ifp, icur, &prev)) 408765c5f419SChristoph Hellwig prev.br_startoff = NULLFILEOFF; 408865c5f419SChristoph Hellwig 40896ca30729SShan Hai error = xfs_bmap_extsize_align(mp, got, &prev, extsz, 0, eof, 409030f712c9SDave Chinner 1, 0, &aoff, &alen); 409130f712c9SDave Chinner ASSERT(!error); 409230f712c9SDave Chinner } 409330f712c9SDave Chinner 409430f712c9SDave Chinner /* 409530f712c9SDave Chinner * Make a transaction-less quota reservation for delayed allocation 409630f712c9SDave Chinner * blocks. This number gets adjusted later. We return if we haven't 409730f712c9SDave Chinner * allocated blocks already inside this loop. 409830f712c9SDave Chinner */ 409985546500SDarrick J. Wong error = xfs_quota_reserve_blkres(ip, alen); 410030f712c9SDave Chinner if (error) 410130f712c9SDave Chinner return error; 410230f712c9SDave Chinner 410330f712c9SDave Chinner /* 410430f712c9SDave Chinner * Split changing sb for alen and indlen since they could be coming 410530f712c9SDave Chinner * from different places. 410630f712c9SDave Chinner */ 410730f712c9SDave Chinner indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); 410830f712c9SDave Chinner ASSERT(indlen > 0); 410930f712c9SDave Chinner 41100d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); 411130f712c9SDave Chinner if (error) 411230f712c9SDave Chinner goto out_unreserve_quota; 411330f712c9SDave Chinner 41140d485adaSDave Chinner error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); 411530f712c9SDave Chinner if (error) 411630f712c9SDave Chinner goto out_unreserve_blocks; 411730f712c9SDave Chinner 411830f712c9SDave Chinner 411930f712c9SDave Chinner ip->i_delayed_blks += alen; 41209fe82b8cSDarrick J. Wong xfs_mod_delalloc(ip->i_mount, alen + indlen); 412130f712c9SDave Chinner 412230f712c9SDave Chinner got->br_startoff = aoff; 412330f712c9SDave Chinner got->br_startblock = nullstartblock(indlen); 412430f712c9SDave Chinner got->br_blockcount = alen; 412530f712c9SDave Chinner got->br_state = XFS_EXT_NORM; 412630f712c9SDave Chinner 4127b2b1712aSChristoph Hellwig xfs_bmap_add_extent_hole_delay(ip, whichfork, icur, got); 412830f712c9SDave Chinner 4129974ae922SBrian Foster /* 4130974ae922SBrian Foster * Tag the inode if blocks were preallocated. Note that COW fork 4131974ae922SBrian Foster * preallocation can occur at the start or end of the extent, even when 4132974ae922SBrian Foster * prealloc == 0, so we must also check the aligned offset and length. 4133974ae922SBrian Foster */ 4134974ae922SBrian Foster if (whichfork == XFS_DATA_FORK && prealloc) 4135974ae922SBrian Foster xfs_inode_set_eofblocks_tag(ip); 4136974ae922SBrian Foster if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len)) 4137974ae922SBrian Foster xfs_inode_set_cowblocks_tag(ip); 4138974ae922SBrian Foster 413930f712c9SDave Chinner return 0; 414030f712c9SDave Chinner 414130f712c9SDave Chinner out_unreserve_blocks: 41420d485adaSDave Chinner xfs_mod_fdblocks(mp, alen, false); 414330f712c9SDave Chinner out_unreserve_quota: 414430f712c9SDave Chinner if (XFS_IS_QUOTA_ON(mp)) 414585546500SDarrick J. Wong xfs_quota_unreserve_blkres(ip, alen); 414630f712c9SDave Chinner return error; 414730f712c9SDave Chinner } 414830f712c9SDave Chinner 41497f8a058fSDave Chinner static int 4150be6cacbeSChristoph Hellwig xfs_bmap_alloc_userdata( 4151be6cacbeSChristoph Hellwig struct xfs_bmalloca *bma) 4152be6cacbeSChristoph Hellwig { 4153be6cacbeSChristoph Hellwig struct xfs_mount *mp = bma->ip->i_mount; 4154be6cacbeSChristoph Hellwig int whichfork = xfs_bmapi_whichfork(bma->flags); 4155be6cacbeSChristoph Hellwig int error; 4156be6cacbeSChristoph Hellwig 4157be6cacbeSChristoph Hellwig /* 4158be6cacbeSChristoph Hellwig * Set the data type being allocated. For the data fork, the first data 4159be6cacbeSChristoph Hellwig * in the file is treated differently to all other allocations. For the 4160be6cacbeSChristoph Hellwig * attribute fork, we only need to ensure the allocated range is not on 4161be6cacbeSChristoph Hellwig * the busy list. 4162be6cacbeSChristoph Hellwig */ 4163be6cacbeSChristoph Hellwig bma->datatype = XFS_ALLOC_NOBUSY; 4164be6cacbeSChristoph Hellwig if (whichfork == XFS_DATA_FORK) { 4165c34d570dSChristoph Hellwig bma->datatype |= XFS_ALLOC_USERDATA; 4166be6cacbeSChristoph Hellwig if (bma->offset == 0) 4167be6cacbeSChristoph Hellwig bma->datatype |= XFS_ALLOC_INITIAL_USER_DATA; 4168be6cacbeSChristoph Hellwig 4169be6cacbeSChristoph Hellwig if (mp->m_dalign && bma->length >= mp->m_dalign) { 4170be6cacbeSChristoph Hellwig error = xfs_bmap_isaeof(bma, whichfork); 4171be6cacbeSChristoph Hellwig if (error) 4172be6cacbeSChristoph Hellwig return error; 4173be6cacbeSChristoph Hellwig } 4174be6cacbeSChristoph Hellwig 4175be6cacbeSChristoph Hellwig if (XFS_IS_REALTIME_INODE(bma->ip)) 4176be6cacbeSChristoph Hellwig return xfs_bmap_rtalloc(bma); 4177be6cacbeSChristoph Hellwig } 4178be6cacbeSChristoph Hellwig 417930151967SChandan Babu R if (unlikely(XFS_TEST_ERROR(false, mp, 418030151967SChandan Babu R XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT))) 418130151967SChandan Babu R return xfs_bmap_exact_minlen_extent_alloc(bma); 418230151967SChandan Babu R 4183be6cacbeSChristoph Hellwig return xfs_bmap_btalloc(bma); 4184be6cacbeSChristoph Hellwig } 4185be6cacbeSChristoph Hellwig 4186be6cacbeSChristoph Hellwig static int 41877f8a058fSDave Chinner xfs_bmapi_allocate( 418830f712c9SDave Chinner struct xfs_bmalloca *bma) 418930f712c9SDave Chinner { 419030f712c9SDave Chinner struct xfs_mount *mp = bma->ip->i_mount; 419160b4984fSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(bma->flags); 419230f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 419330f712c9SDave Chinner int tmp_logflags = 0; 419430f712c9SDave Chinner int error; 419530f712c9SDave Chinner 419630f712c9SDave Chinner ASSERT(bma->length > 0); 419730f712c9SDave Chinner 419830f712c9SDave Chinner /* 419930f712c9SDave Chinner * For the wasdelay case, we could also just allocate the stuff asked 420030f712c9SDave Chinner * for in this bmap call but that wouldn't be as good. 420130f712c9SDave Chinner */ 420230f712c9SDave Chinner if (bma->wasdel) { 420330f712c9SDave Chinner bma->length = (xfs_extlen_t)bma->got.br_blockcount; 420430f712c9SDave Chinner bma->offset = bma->got.br_startoff; 4205f5be0844SDarrick J. Wong if (!xfs_iext_peek_prev_extent(ifp, &bma->icur, &bma->prev)) 4206f5be0844SDarrick J. Wong bma->prev.br_startoff = NULLFILEOFF; 420730f712c9SDave Chinner } else { 420830f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); 420930f712c9SDave Chinner if (!bma->eof) 421030f712c9SDave Chinner bma->length = XFS_FILBLKS_MIN(bma->length, 421130f712c9SDave Chinner bma->got.br_startoff - bma->offset); 421230f712c9SDave Chinner } 421330f712c9SDave Chinner 4214be6cacbeSChristoph Hellwig if (bma->flags & XFS_BMAPI_CONTIG) 4215be6cacbeSChristoph Hellwig bma->minlen = bma->length; 4216ce840429SDarrick J. Wong else 4217be6cacbeSChristoph Hellwig bma->minlen = 1; 421830f712c9SDave Chinner 421930151967SChandan Babu R if (bma->flags & XFS_BMAPI_METADATA) { 422030151967SChandan Babu R if (unlikely(XFS_TEST_ERROR(false, mp, 422130151967SChandan Babu R XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT))) 422230151967SChandan Babu R error = xfs_bmap_exact_minlen_extent_alloc(bma); 4223be6cacbeSChristoph Hellwig else 422430151967SChandan Babu R error = xfs_bmap_btalloc(bma); 422530151967SChandan Babu R } else { 4226be6cacbeSChristoph Hellwig error = xfs_bmap_alloc_userdata(bma); 422730151967SChandan Babu R } 4228be6cacbeSChristoph Hellwig if (error || bma->blkno == NULLFSBLOCK) 422930f712c9SDave Chinner return error; 423030f712c9SDave Chinner 4231fd638f1dSChristoph Hellwig if (bma->flags & XFS_BMAPI_ZERO) { 4232fd638f1dSChristoph Hellwig error = xfs_zero_extent(bma->ip, bma->blkno, bma->length); 4233fd638f1dSChristoph Hellwig if (error) 4234fd638f1dSChristoph Hellwig return error; 4235fd638f1dSChristoph Hellwig } 4236fd638f1dSChristoph Hellwig 4237cf612de7SBrian Foster if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) 423830f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); 423930f712c9SDave Chinner /* 424030f712c9SDave Chinner * Bump the number of extents we've allocated 424130f712c9SDave Chinner * in this call. 424230f712c9SDave Chinner */ 424330f712c9SDave Chinner bma->nallocs++; 424430f712c9SDave Chinner 424530f712c9SDave Chinner if (bma->cur) 424692219c29SDave Chinner bma->cur->bc_ino.flags = 42478ef54797SDave Chinner bma->wasdel ? XFS_BTCUR_BMBT_WASDEL : 0; 424830f712c9SDave Chinner 424930f712c9SDave Chinner bma->got.br_startoff = bma->offset; 425030f712c9SDave Chinner bma->got.br_startblock = bma->blkno; 425130f712c9SDave Chinner bma->got.br_blockcount = bma->length; 425230f712c9SDave Chinner bma->got.br_state = XFS_EXT_NORM; 425330f712c9SDave Chinner 4254a5949d3fSDarrick J. Wong if (bma->flags & XFS_BMAPI_PREALLOC) 425530f712c9SDave Chinner bma->got.br_state = XFS_EXT_UNWRITTEN; 425630f712c9SDave Chinner 425730f712c9SDave Chinner if (bma->wasdel) 425860b4984fSDarrick J. Wong error = xfs_bmap_add_extent_delay_real(bma, whichfork); 425930f712c9SDave Chinner else 42606d04558fSChristoph Hellwig error = xfs_bmap_add_extent_hole_real(bma->tp, bma->ip, 4261b2b1712aSChristoph Hellwig whichfork, &bma->icur, &bma->cur, &bma->got, 426292f9da30SBrian Foster &bma->logflags, bma->flags); 426330f712c9SDave Chinner 426430f712c9SDave Chinner bma->logflags |= tmp_logflags; 426530f712c9SDave Chinner if (error) 426630f712c9SDave Chinner return error; 426730f712c9SDave Chinner 426830f712c9SDave Chinner /* 426930f712c9SDave Chinner * Update our extent pointer, given that xfs_bmap_add_extent_delay_real 427030f712c9SDave Chinner * or xfs_bmap_add_extent_hole_real might have merged it into one of 427130f712c9SDave Chinner * the neighbouring ones. 427230f712c9SDave Chinner */ 4273b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &bma->icur, &bma->got); 427430f712c9SDave Chinner 427530f712c9SDave Chinner ASSERT(bma->got.br_startoff <= bma->offset); 427630f712c9SDave Chinner ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= 427730f712c9SDave Chinner bma->offset + bma->length); 427830f712c9SDave Chinner ASSERT(bma->got.br_state == XFS_EXT_NORM || 427930f712c9SDave Chinner bma->got.br_state == XFS_EXT_UNWRITTEN); 428030f712c9SDave Chinner return 0; 428130f712c9SDave Chinner } 428230f712c9SDave Chinner 428330f712c9SDave Chinner STATIC int 428430f712c9SDave Chinner xfs_bmapi_convert_unwritten( 428530f712c9SDave Chinner struct xfs_bmalloca *bma, 428630f712c9SDave Chinner struct xfs_bmbt_irec *mval, 428730f712c9SDave Chinner xfs_filblks_t len, 428830f712c9SDave Chinner int flags) 428930f712c9SDave Chinner { 42903993baebSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 429130f712c9SDave Chinner struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 429230f712c9SDave Chinner int tmp_logflags = 0; 429330f712c9SDave Chinner int error; 429430f712c9SDave Chinner 429530f712c9SDave Chinner /* check if we need to do unwritten->real conversion */ 429630f712c9SDave Chinner if (mval->br_state == XFS_EXT_UNWRITTEN && 429730f712c9SDave Chinner (flags & XFS_BMAPI_PREALLOC)) 429830f712c9SDave Chinner return 0; 429930f712c9SDave Chinner 430030f712c9SDave Chinner /* check if we need to do real->unwritten conversion */ 430130f712c9SDave Chinner if (mval->br_state == XFS_EXT_NORM && 430230f712c9SDave Chinner (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != 430330f712c9SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) 430430f712c9SDave Chinner return 0; 430530f712c9SDave Chinner 430630f712c9SDave Chinner /* 430730f712c9SDave Chinner * Modify (by adding) the state flag, if writing. 430830f712c9SDave Chinner */ 430930f712c9SDave Chinner ASSERT(mval->br_blockcount <= len); 431030f712c9SDave Chinner if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { 431130f712c9SDave Chinner bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, 431230f712c9SDave Chinner bma->ip, whichfork); 431330f712c9SDave Chinner } 431430f712c9SDave Chinner mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) 431530f712c9SDave Chinner ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; 431630f712c9SDave Chinner 43173fbbbea3SDave Chinner /* 43183fbbbea3SDave Chinner * Before insertion into the bmbt, zero the range being converted 43193fbbbea3SDave Chinner * if required. 43203fbbbea3SDave Chinner */ 43213fbbbea3SDave Chinner if (flags & XFS_BMAPI_ZERO) { 43223fbbbea3SDave Chinner error = xfs_zero_extent(bma->ip, mval->br_startblock, 43233fbbbea3SDave Chinner mval->br_blockcount); 43243fbbbea3SDave Chinner if (error) 43253fbbbea3SDave Chinner return error; 43263fbbbea3SDave Chinner } 43273fbbbea3SDave Chinner 432805a630d7SDarrick J. Wong error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, whichfork, 432992f9da30SBrian Foster &bma->icur, &bma->cur, mval, &tmp_logflags); 43302e588a46SBrian Foster /* 43312e588a46SBrian Foster * Log the inode core unconditionally in the unwritten extent conversion 43322e588a46SBrian Foster * path because the conversion might not have done so (e.g., if the 43332e588a46SBrian Foster * extent count hasn't changed). We need to make sure the inode is dirty 43342e588a46SBrian Foster * in the transaction for the sake of fsync(), even if nothing has 43352e588a46SBrian Foster * changed, because fsync() will not force the log for this transaction 43362e588a46SBrian Foster * unless it sees the inode pinned. 433705a630d7SDarrick J. Wong * 433805a630d7SDarrick J. Wong * Note: If we're only converting cow fork extents, there aren't 433905a630d7SDarrick J. Wong * any on-disk updates to make, so we don't need to log anything. 43402e588a46SBrian Foster */ 434105a630d7SDarrick J. Wong if (whichfork != XFS_COW_FORK) 43422e588a46SBrian Foster bma->logflags |= tmp_logflags | XFS_ILOG_CORE; 434330f712c9SDave Chinner if (error) 434430f712c9SDave Chinner return error; 434530f712c9SDave Chinner 434630f712c9SDave Chinner /* 434730f712c9SDave Chinner * Update our extent pointer, given that 434830f712c9SDave Chinner * xfs_bmap_add_extent_unwritten_real might have merged it into one 434930f712c9SDave Chinner * of the neighbouring ones. 435030f712c9SDave Chinner */ 4351b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, &bma->icur, &bma->got); 435230f712c9SDave Chinner 435330f712c9SDave Chinner /* 435430f712c9SDave Chinner * We may have combined previously unwritten space with written space, 435530f712c9SDave Chinner * so generate another request. 435630f712c9SDave Chinner */ 435730f712c9SDave Chinner if (mval->br_blockcount < len) 43582451337dSDave Chinner return -EAGAIN; 435930f712c9SDave Chinner return 0; 436030f712c9SDave Chinner } 436130f712c9SDave Chinner 4362c8b54673SChristoph Hellwig static inline xfs_extlen_t 4363c8b54673SChristoph Hellwig xfs_bmapi_minleft( 4364c8b54673SChristoph Hellwig struct xfs_trans *tp, 4365c8b54673SChristoph Hellwig struct xfs_inode *ip, 4366c8b54673SChristoph Hellwig int fork) 4367c8b54673SChristoph Hellwig { 4368f7e67b20SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, fork); 4369f7e67b20SChristoph Hellwig 4370c8b54673SChristoph Hellwig if (tp && tp->t_firstblock != NULLFSBLOCK) 4371c8b54673SChristoph Hellwig return 0; 4372f7e67b20SChristoph Hellwig if (ifp->if_format != XFS_DINODE_FMT_BTREE) 4373c8b54673SChristoph Hellwig return 1; 4374f7e67b20SChristoph Hellwig return be16_to_cpu(ifp->if_broot->bb_level) + 1; 4375c8b54673SChristoph Hellwig } 4376c8b54673SChristoph Hellwig 4377c8b54673SChristoph Hellwig /* 4378c8b54673SChristoph Hellwig * Log whatever the flags say, even if error. Otherwise we might miss detecting 4379c8b54673SChristoph Hellwig * a case where the data is changed, there's an error, and it's not logged so we 4380c8b54673SChristoph Hellwig * don't shutdown when we should. Don't bother logging extents/btree changes if 4381c8b54673SChristoph Hellwig * we converted to the other format. 4382c8b54673SChristoph Hellwig */ 4383c8b54673SChristoph Hellwig static void 4384c8b54673SChristoph Hellwig xfs_bmapi_finish( 4385c8b54673SChristoph Hellwig struct xfs_bmalloca *bma, 4386c8b54673SChristoph Hellwig int whichfork, 4387c8b54673SChristoph Hellwig int error) 4388c8b54673SChristoph Hellwig { 4389f7e67b20SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); 4390f7e67b20SChristoph Hellwig 4391c8b54673SChristoph Hellwig if ((bma->logflags & xfs_ilog_fext(whichfork)) && 4392f7e67b20SChristoph Hellwig ifp->if_format != XFS_DINODE_FMT_EXTENTS) 4393c8b54673SChristoph Hellwig bma->logflags &= ~xfs_ilog_fext(whichfork); 4394c8b54673SChristoph Hellwig else if ((bma->logflags & xfs_ilog_fbroot(whichfork)) && 4395f7e67b20SChristoph Hellwig ifp->if_format != XFS_DINODE_FMT_BTREE) 4396c8b54673SChristoph Hellwig bma->logflags &= ~xfs_ilog_fbroot(whichfork); 4397c8b54673SChristoph Hellwig 4398c8b54673SChristoph Hellwig if (bma->logflags) 4399c8b54673SChristoph Hellwig xfs_trans_log_inode(bma->tp, bma->ip, bma->logflags); 4400c8b54673SChristoph Hellwig if (bma->cur) 4401c8b54673SChristoph Hellwig xfs_btree_del_cursor(bma->cur, error); 4402c8b54673SChristoph Hellwig } 4403c8b54673SChristoph Hellwig 440430f712c9SDave Chinner /* 440530f712c9SDave Chinner * Map file blocks to filesystem blocks, and allocate blocks or convert the 440630f712c9SDave Chinner * extent state if necessary. Details behaviour is controlled by the flags 440730f712c9SDave Chinner * parameter. Only allocates blocks from a single allocation group, to avoid 440830f712c9SDave Chinner * locking problems. 440930f712c9SDave Chinner */ 441030f712c9SDave Chinner int 441130f712c9SDave Chinner xfs_bmapi_write( 441230f712c9SDave Chinner struct xfs_trans *tp, /* transaction pointer */ 441330f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 441430f712c9SDave Chinner xfs_fileoff_t bno, /* starting file offs. mapped */ 441530f712c9SDave Chinner xfs_filblks_t len, /* length to map in file */ 441630f712c9SDave Chinner int flags, /* XFS_BMAPI_... */ 441730f712c9SDave Chinner xfs_extlen_t total, /* total blocks needed */ 441830f712c9SDave Chinner struct xfs_bmbt_irec *mval, /* output: map values */ 44196e702a5dSBrian Foster int *nmap) /* i/o: mval size/count */ 442030f712c9SDave Chinner { 44214b0bce30SDarrick J. Wong struct xfs_bmalloca bma = { 44224b0bce30SDarrick J. Wong .tp = tp, 44234b0bce30SDarrick J. Wong .ip = ip, 44244b0bce30SDarrick J. Wong .total = total, 44254b0bce30SDarrick J. Wong }; 442630f712c9SDave Chinner struct xfs_mount *mp = ip->i_mount; 4427f7e67b20SChristoph Hellwig int whichfork = xfs_bmapi_whichfork(flags); 4428f7e67b20SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 442930f712c9SDave Chinner xfs_fileoff_t end; /* end of mapped file region */ 44302d58f6efSChristoph Hellwig bool eof = false; /* after the end of extents */ 443130f712c9SDave Chinner int error; /* error return */ 443230f712c9SDave Chinner int n; /* current extent index */ 443330f712c9SDave Chinner xfs_fileoff_t obno; /* old block number (offset) */ 443430f712c9SDave Chinner 443530f712c9SDave Chinner #ifdef DEBUG 443630f712c9SDave Chinner xfs_fileoff_t orig_bno; /* original block number value */ 443730f712c9SDave Chinner int orig_flags; /* original flags arg value */ 443830f712c9SDave Chinner xfs_filblks_t orig_len; /* original value of len arg */ 443930f712c9SDave Chinner struct xfs_bmbt_irec *orig_mval; /* original value of mval */ 444030f712c9SDave Chinner int orig_nmap; /* original value of *nmap */ 444130f712c9SDave Chinner 444230f712c9SDave Chinner orig_bno = bno; 444330f712c9SDave Chinner orig_len = len; 444430f712c9SDave Chinner orig_flags = flags; 444530f712c9SDave Chinner orig_mval = mval; 444630f712c9SDave Chinner orig_nmap = *nmap; 444730f712c9SDave Chinner #endif 444830f712c9SDave Chinner 444930f712c9SDave Chinner ASSERT(*nmap >= 1); 445030f712c9SDave Chinner ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); 445126b91c72SChristoph Hellwig ASSERT(tp != NULL); 445230f712c9SDave Chinner ASSERT(len > 0); 4453f7e67b20SChristoph Hellwig ASSERT(ifp->if_format != XFS_DINODE_FMT_LOCAL); 445430f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 44556ebd5a44SChristoph Hellwig ASSERT(!(flags & XFS_BMAPI_REMAP)); 445630f712c9SDave Chinner 44573fbbbea3SDave Chinner /* zeroing is for currently only for data extents, not metadata */ 44583fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != 44593fbbbea3SDave Chinner (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)); 44603fbbbea3SDave Chinner /* 44613fbbbea3SDave Chinner * we can allocate unwritten extents or pre-zero allocated blocks, 44623fbbbea3SDave Chinner * but it makes no sense to do both at once. This would result in 44633fbbbea3SDave Chinner * zeroing the unwritten extent twice, but it still being an 44643fbbbea3SDave Chinner * unwritten extent.... 44653fbbbea3SDave Chinner */ 44663fbbbea3SDave Chinner ASSERT((flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)) != 44673fbbbea3SDave Chinner (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)); 44683fbbbea3SDave Chinner 4469f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp)) || 4470a71895c5SDarrick J. Wong XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BMAPIFORMAT)) { 44712451337dSDave Chinner return -EFSCORRUPTED; 447230f712c9SDave Chinner } 447330f712c9SDave Chinner 447430f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 44752451337dSDave Chinner return -EIO; 447630f712c9SDave Chinner 4477ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_mapw); 447830f712c9SDave Chinner 447930f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 448030f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 448130f712c9SDave Chinner if (error) 448230f712c9SDave Chinner goto error0; 448330f712c9SDave Chinner } 448430f712c9SDave Chinner 4485b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, bno, &bma.icur, &bma.got)) 44862d58f6efSChristoph Hellwig eof = true; 4487b2b1712aSChristoph Hellwig if (!xfs_iext_peek_prev_extent(ifp, &bma.icur, &bma.prev)) 44882d58f6efSChristoph Hellwig bma.prev.br_startoff = NULLFILEOFF; 4489c8b54673SChristoph Hellwig bma.minleft = xfs_bmapi_minleft(tp, ip, whichfork); 449030f712c9SDave Chinner 4491627209fbSBrian Foster n = 0; 4492627209fbSBrian Foster end = bno + len; 4493627209fbSBrian Foster obno = bno; 449430f712c9SDave Chinner while (bno < end && n < *nmap) { 4495d2b3964aSChristoph Hellwig bool need_alloc = false, wasdelay = false; 449630f712c9SDave Chinner 4497be78ff0eSDarrick J. Wong /* in hole or beyond EOF? */ 4498d2b3964aSChristoph Hellwig if (eof || bma.got.br_startoff > bno) { 4499be78ff0eSDarrick J. Wong /* 4500be78ff0eSDarrick J. Wong * CoW fork conversions should /never/ hit EOF or 4501be78ff0eSDarrick J. Wong * holes. There should always be something for us 4502be78ff0eSDarrick J. Wong * to work on. 4503be78ff0eSDarrick J. Wong */ 4504be78ff0eSDarrick J. Wong ASSERT(!((flags & XFS_BMAPI_CONVERT) && 4505be78ff0eSDarrick J. Wong (flags & XFS_BMAPI_COWFORK))); 4506be78ff0eSDarrick J. Wong 4507d2b3964aSChristoph Hellwig need_alloc = true; 45086ebd5a44SChristoph Hellwig } else if (isnullstartblock(bma.got.br_startblock)) { 4509d2b3964aSChristoph Hellwig wasdelay = true; 4510d2b3964aSChristoph Hellwig } 4511f65306eaSDarrick J. Wong 4512f65306eaSDarrick J. Wong /* 451330f712c9SDave Chinner * First, deal with the hole before the allocated space 451430f712c9SDave Chinner * that we found, if any. 451530f712c9SDave Chinner */ 451626b91c72SChristoph Hellwig if (need_alloc || wasdelay) { 451730f712c9SDave Chinner bma.eof = eof; 451830f712c9SDave Chinner bma.conv = !!(flags & XFS_BMAPI_CONVERT); 451930f712c9SDave Chinner bma.wasdel = wasdelay; 452030f712c9SDave Chinner bma.offset = bno; 452130f712c9SDave Chinner bma.flags = flags; 452230f712c9SDave Chinner 452330f712c9SDave Chinner /* 452430f712c9SDave Chinner * There's a 32/64 bit type mismatch between the 452530f712c9SDave Chinner * allocation length request (which can be 64 bits in 452630f712c9SDave Chinner * length) and the bma length request, which is 452730f712c9SDave Chinner * xfs_extlen_t and therefore 32 bits. Hence we have to 452830f712c9SDave Chinner * check for 32-bit overflows and handle them here. 452930f712c9SDave Chinner */ 453030f712c9SDave Chinner if (len > (xfs_filblks_t)MAXEXTLEN) 453130f712c9SDave Chinner bma.length = MAXEXTLEN; 453230f712c9SDave Chinner else 453330f712c9SDave Chinner bma.length = len; 453430f712c9SDave Chinner 453530f712c9SDave Chinner ASSERT(len > 0); 453630f712c9SDave Chinner ASSERT(bma.length > 0); 453730f712c9SDave Chinner error = xfs_bmapi_allocate(&bma); 453830f712c9SDave Chinner if (error) 453930f712c9SDave Chinner goto error0; 454030f712c9SDave Chinner if (bma.blkno == NULLFSBLOCK) 454130f712c9SDave Chinner break; 4542174edb0eSDarrick J. Wong 4543174edb0eSDarrick J. Wong /* 4544174edb0eSDarrick J. Wong * If this is a CoW allocation, record the data in 4545174edb0eSDarrick J. Wong * the refcount btree for orphan recovery. 4546174edb0eSDarrick J. Wong */ 454774b4c5d4SDarrick J. Wong if (whichfork == XFS_COW_FORK) 454874b4c5d4SDarrick J. Wong xfs_refcount_alloc_cow_extent(tp, bma.blkno, 454974b4c5d4SDarrick J. Wong bma.length); 455030f712c9SDave Chinner } 455130f712c9SDave Chinner 455230f712c9SDave Chinner /* Deal with the allocated space we found. */ 455330f712c9SDave Chinner xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, 455430f712c9SDave Chinner end, n, flags); 455530f712c9SDave Chinner 455630f712c9SDave Chinner /* Execute unwritten extent conversion if necessary */ 455730f712c9SDave Chinner error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); 45582451337dSDave Chinner if (error == -EAGAIN) 455930f712c9SDave Chinner continue; 456030f712c9SDave Chinner if (error) 456130f712c9SDave Chinner goto error0; 456230f712c9SDave Chinner 456330f712c9SDave Chinner /* update the extent map to return */ 456430f712c9SDave Chinner xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); 456530f712c9SDave Chinner 456630f712c9SDave Chinner /* 456730f712c9SDave Chinner * If we're done, stop now. Stop when we've allocated 456830f712c9SDave Chinner * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise 456930f712c9SDave Chinner * the transaction may get too big. 457030f712c9SDave Chinner */ 457130f712c9SDave Chinner if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) 457230f712c9SDave Chinner break; 457330f712c9SDave Chinner 457430f712c9SDave Chinner /* Else go on to the next record. */ 457530f712c9SDave Chinner bma.prev = bma.got; 4576b2b1712aSChristoph Hellwig if (!xfs_iext_next_extent(ifp, &bma.icur, &bma.got)) 45772d58f6efSChristoph Hellwig eof = true; 457830f712c9SDave Chinner } 457930f712c9SDave Chinner *nmap = n; 458030f712c9SDave Chinner 4581b101e334SChristoph Hellwig error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, &bma.logflags, 4582b101e334SChristoph Hellwig whichfork); 458330f712c9SDave Chinner if (error) 458430f712c9SDave Chinner goto error0; 458530f712c9SDave Chinner 4586f7e67b20SChristoph Hellwig ASSERT(ifp->if_format != XFS_DINODE_FMT_BTREE || 4587daf83964SChristoph Hellwig ifp->if_nextents > XFS_IFORK_MAXEXT(ip, whichfork)); 4588c8b54673SChristoph Hellwig xfs_bmapi_finish(&bma, whichfork, 0); 458930f712c9SDave Chinner xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, 459030f712c9SDave Chinner orig_nmap, *nmap); 4591c8b54673SChristoph Hellwig return 0; 4592c8b54673SChristoph Hellwig error0: 4593c8b54673SChristoph Hellwig xfs_bmapi_finish(&bma, whichfork, error); 459430f712c9SDave Chinner return error; 459530f712c9SDave Chinner } 459630f712c9SDave Chinner 4597627209fbSBrian Foster /* 4598627209fbSBrian Foster * Convert an existing delalloc extent to real blocks based on file offset. This 4599627209fbSBrian Foster * attempts to allocate the entire delalloc extent and may require multiple 4600627209fbSBrian Foster * invocations to allocate the target offset if a large enough physical extent 4601627209fbSBrian Foster * is not available. 4602627209fbSBrian Foster */ 4603627209fbSBrian Foster int 4604627209fbSBrian Foster xfs_bmapi_convert_delalloc( 4605627209fbSBrian Foster struct xfs_inode *ip, 4606627209fbSBrian Foster int whichfork, 46074e087a3bSChristoph Hellwig xfs_off_t offset, 46084e087a3bSChristoph Hellwig struct iomap *iomap, 4609491ce61eSChristoph Hellwig unsigned int *seq) 4610627209fbSBrian Foster { 4611d8ae82e3SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 4612491ce61eSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 46134e087a3bSChristoph Hellwig xfs_fileoff_t offset_fsb = XFS_B_TO_FSBT(mp, offset); 4614d8ae82e3SChristoph Hellwig struct xfs_bmalloca bma = { NULL }; 4615af952aebSDarrick J. Wong uint16_t flags = 0; 4616491ce61eSChristoph Hellwig struct xfs_trans *tp; 4617627209fbSBrian Foster int error; 4618627209fbSBrian Foster 46194e087a3bSChristoph Hellwig if (whichfork == XFS_COW_FORK) 46204e087a3bSChristoph Hellwig flags |= IOMAP_F_SHARED; 46214e087a3bSChristoph Hellwig 4622491ce61eSChristoph Hellwig /* 4623491ce61eSChristoph Hellwig * Space for the extent and indirect blocks was reserved when the 4624491ce61eSChristoph Hellwig * delalloc extent was created so there's no need to do so here. 4625491ce61eSChristoph Hellwig */ 4626491ce61eSChristoph Hellwig error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 0, 0, 4627491ce61eSChristoph Hellwig XFS_TRANS_RESERVE, &tp); 4628491ce61eSChristoph Hellwig if (error) 4629491ce61eSChristoph Hellwig return error; 4630491ce61eSChristoph Hellwig 4631491ce61eSChristoph Hellwig xfs_ilock(ip, XFS_ILOCK_EXCL); 4632727e1acdSChandan Babu R 4633727e1acdSChandan Babu R error = xfs_iext_count_may_overflow(ip, whichfork, 4634727e1acdSChandan Babu R XFS_IEXT_ADD_NOSPLIT_CNT); 4635727e1acdSChandan Babu R if (error) 4636727e1acdSChandan Babu R goto out_trans_cancel; 4637727e1acdSChandan Babu R 4638491ce61eSChristoph Hellwig xfs_trans_ijoin(tp, ip, 0); 4639491ce61eSChristoph Hellwig 4640d8ae82e3SChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &bma.icur, &bma.got) || 4641d8ae82e3SChristoph Hellwig bma.got.br_startoff > offset_fsb) { 4642d8ae82e3SChristoph Hellwig /* 4643d8ae82e3SChristoph Hellwig * No extent found in the range we are trying to convert. This 4644d8ae82e3SChristoph Hellwig * should only happen for the COW fork, where another thread 4645d8ae82e3SChristoph Hellwig * might have moved the extent to the data fork in the meantime. 4646d8ae82e3SChristoph Hellwig */ 4647d8ae82e3SChristoph Hellwig WARN_ON_ONCE(whichfork != XFS_COW_FORK); 4648491ce61eSChristoph Hellwig error = -EAGAIN; 4649491ce61eSChristoph Hellwig goto out_trans_cancel; 4650d8ae82e3SChristoph Hellwig } 4651627209fbSBrian Foster 4652627209fbSBrian Foster /* 4653d8ae82e3SChristoph Hellwig * If we find a real extent here we raced with another thread converting 4654d8ae82e3SChristoph Hellwig * the extent. Just return the real extent at this offset. 4655627209fbSBrian Foster */ 4656d8ae82e3SChristoph Hellwig if (!isnullstartblock(bma.got.br_startblock)) { 46574e087a3bSChristoph Hellwig xfs_bmbt_to_iomap(ip, iomap, &bma.got, flags); 4658491ce61eSChristoph Hellwig *seq = READ_ONCE(ifp->if_seq); 4659491ce61eSChristoph Hellwig goto out_trans_cancel; 4660d8ae82e3SChristoph Hellwig } 4661d8ae82e3SChristoph Hellwig 4662d8ae82e3SChristoph Hellwig bma.tp = tp; 4663d8ae82e3SChristoph Hellwig bma.ip = ip; 4664d8ae82e3SChristoph Hellwig bma.wasdel = true; 4665d8ae82e3SChristoph Hellwig bma.offset = bma.got.br_startoff; 4666d8ae82e3SChristoph Hellwig bma.length = max_t(xfs_filblks_t, bma.got.br_blockcount, MAXEXTLEN); 4667d8ae82e3SChristoph Hellwig bma.minleft = xfs_bmapi_minleft(tp, ip, whichfork); 4668a5949d3fSDarrick J. Wong 4669a5949d3fSDarrick J. Wong /* 4670a5949d3fSDarrick J. Wong * When we're converting the delalloc reservations backing dirty pages 4671a5949d3fSDarrick J. Wong * in the page cache, we must be careful about how we create the new 4672a5949d3fSDarrick J. Wong * extents: 4673a5949d3fSDarrick J. Wong * 4674a5949d3fSDarrick J. Wong * New CoW fork extents are created unwritten, turned into real extents 4675a5949d3fSDarrick J. Wong * when we're about to write the data to disk, and mapped into the data 4676a5949d3fSDarrick J. Wong * fork after the write finishes. End of story. 4677a5949d3fSDarrick J. Wong * 4678a5949d3fSDarrick J. Wong * New data fork extents must be mapped in as unwritten and converted 4679a5949d3fSDarrick J. Wong * to real extents after the write succeeds to avoid exposing stale 4680a5949d3fSDarrick J. Wong * disk contents if we crash. 4681a5949d3fSDarrick J. Wong */ 4682a5949d3fSDarrick J. Wong bma.flags = XFS_BMAPI_PREALLOC; 4683d8ae82e3SChristoph Hellwig if (whichfork == XFS_COW_FORK) 4684a5949d3fSDarrick J. Wong bma.flags |= XFS_BMAPI_COWFORK; 4685d8ae82e3SChristoph Hellwig 4686d8ae82e3SChristoph Hellwig if (!xfs_iext_peek_prev_extent(ifp, &bma.icur, &bma.prev)) 4687d8ae82e3SChristoph Hellwig bma.prev.br_startoff = NULLFILEOFF; 4688d8ae82e3SChristoph Hellwig 4689d8ae82e3SChristoph Hellwig error = xfs_bmapi_allocate(&bma); 4690d8ae82e3SChristoph Hellwig if (error) 4691d8ae82e3SChristoph Hellwig goto out_finish; 4692d8ae82e3SChristoph Hellwig 4693d8ae82e3SChristoph Hellwig error = -ENOSPC; 4694d8ae82e3SChristoph Hellwig if (WARN_ON_ONCE(bma.blkno == NULLFSBLOCK)) 4695d8ae82e3SChristoph Hellwig goto out_finish; 4696627209fbSBrian Foster error = -EFSCORRUPTED; 4697eb77b23bSChristoph Hellwig if (WARN_ON_ONCE(!xfs_valid_startblock(ip, bma.got.br_startblock))) 4698d8ae82e3SChristoph Hellwig goto out_finish; 4699d8ae82e3SChristoph Hellwig 4700125851acSChristoph Hellwig XFS_STATS_ADD(mp, xs_xstrat_bytes, XFS_FSB_TO_B(mp, bma.length)); 4701125851acSChristoph Hellwig XFS_STATS_INC(mp, xs_xstrat_quick); 4702125851acSChristoph Hellwig 4703d8ae82e3SChristoph Hellwig ASSERT(!isnullstartblock(bma.got.br_startblock)); 47044e087a3bSChristoph Hellwig xfs_bmbt_to_iomap(ip, iomap, &bma.got, flags); 4705491ce61eSChristoph Hellwig *seq = READ_ONCE(ifp->if_seq); 4706d8ae82e3SChristoph Hellwig 470774b4c5d4SDarrick J. Wong if (whichfork == XFS_COW_FORK) 470874b4c5d4SDarrick J. Wong xfs_refcount_alloc_cow_extent(tp, bma.blkno, bma.length); 4709d8ae82e3SChristoph Hellwig 4710d8ae82e3SChristoph Hellwig error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, &bma.logflags, 4711d8ae82e3SChristoph Hellwig whichfork); 4712491ce61eSChristoph Hellwig if (error) 4713491ce61eSChristoph Hellwig goto out_finish; 4714491ce61eSChristoph Hellwig 4715491ce61eSChristoph Hellwig xfs_bmapi_finish(&bma, whichfork, 0); 4716491ce61eSChristoph Hellwig error = xfs_trans_commit(tp); 4717491ce61eSChristoph Hellwig xfs_iunlock(ip, XFS_ILOCK_EXCL); 4718491ce61eSChristoph Hellwig return error; 4719491ce61eSChristoph Hellwig 4720d8ae82e3SChristoph Hellwig out_finish: 4721d8ae82e3SChristoph Hellwig xfs_bmapi_finish(&bma, whichfork, error); 4722491ce61eSChristoph Hellwig out_trans_cancel: 4723491ce61eSChristoph Hellwig xfs_trans_cancel(tp); 4724491ce61eSChristoph Hellwig xfs_iunlock(ip, XFS_ILOCK_EXCL); 4725627209fbSBrian Foster return error; 4726627209fbSBrian Foster } 4727627209fbSBrian Foster 47287cf199baSDarrick J. Wong int 47296ebd5a44SChristoph Hellwig xfs_bmapi_remap( 47306ebd5a44SChristoph Hellwig struct xfs_trans *tp, 47316ebd5a44SChristoph Hellwig struct xfs_inode *ip, 47326ebd5a44SChristoph Hellwig xfs_fileoff_t bno, 47336ebd5a44SChristoph Hellwig xfs_filblks_t len, 47346ebd5a44SChristoph Hellwig xfs_fsblock_t startblock, 47357cf199baSDarrick J. Wong int flags) 47366ebd5a44SChristoph Hellwig { 47376ebd5a44SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 47387cf199baSDarrick J. Wong struct xfs_ifork *ifp; 47396ebd5a44SChristoph Hellwig struct xfs_btree_cur *cur = NULL; 47406ebd5a44SChristoph Hellwig struct xfs_bmbt_irec got; 4741b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 47427cf199baSDarrick J. Wong int whichfork = xfs_bmapi_whichfork(flags); 47436ebd5a44SChristoph Hellwig int logflags = 0, error; 47446ebd5a44SChristoph Hellwig 47457cf199baSDarrick J. Wong ifp = XFS_IFORK_PTR(ip, whichfork); 47466ebd5a44SChristoph Hellwig ASSERT(len > 0); 47476ebd5a44SChristoph Hellwig ASSERT(len <= (xfs_filblks_t)MAXEXTLEN); 47486ebd5a44SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 47497644bd98SDarrick J. Wong ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC | 47507644bd98SDarrick J. Wong XFS_BMAPI_NORMAP))); 47517644bd98SDarrick J. Wong ASSERT((flags & (XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC)) != 47527644bd98SDarrick J. Wong (XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC)); 47536ebd5a44SChristoph Hellwig 4754f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp)) || 4755a71895c5SDarrick J. Wong XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BMAPIFORMAT)) { 47566ebd5a44SChristoph Hellwig return -EFSCORRUPTED; 47576ebd5a44SChristoph Hellwig } 47586ebd5a44SChristoph Hellwig 47596ebd5a44SChristoph Hellwig if (XFS_FORCED_SHUTDOWN(mp)) 47606ebd5a44SChristoph Hellwig return -EIO; 47616ebd5a44SChristoph Hellwig 47626ebd5a44SChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 47637cf199baSDarrick J. Wong error = xfs_iread_extents(tp, ip, whichfork); 47646ebd5a44SChristoph Hellwig if (error) 47656ebd5a44SChristoph Hellwig return error; 47666ebd5a44SChristoph Hellwig } 47676ebd5a44SChristoph Hellwig 4768b2b1712aSChristoph Hellwig if (xfs_iext_lookup_extent(ip, ifp, bno, &icur, &got)) { 47696ebd5a44SChristoph Hellwig /* make sure we only reflink into a hole. */ 47706ebd5a44SChristoph Hellwig ASSERT(got.br_startoff > bno); 47716ebd5a44SChristoph Hellwig ASSERT(got.br_startoff - bno >= len); 47726ebd5a44SChristoph Hellwig } 47736ebd5a44SChristoph Hellwig 47746e73a545SChristoph Hellwig ip->i_nblocks += len; 4775bf8eadbaSChristoph Hellwig xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 47766ebd5a44SChristoph Hellwig 47776ebd5a44SChristoph Hellwig if (ifp->if_flags & XFS_IFBROOT) { 47787cf199baSDarrick J. Wong cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 477992219c29SDave Chinner cur->bc_ino.flags = 0; 47806ebd5a44SChristoph Hellwig } 47816ebd5a44SChristoph Hellwig 47826ebd5a44SChristoph Hellwig got.br_startoff = bno; 47836ebd5a44SChristoph Hellwig got.br_startblock = startblock; 47846ebd5a44SChristoph Hellwig got.br_blockcount = len; 47857644bd98SDarrick J. Wong if (flags & XFS_BMAPI_PREALLOC) 47867644bd98SDarrick J. Wong got.br_state = XFS_EXT_UNWRITTEN; 47877644bd98SDarrick J. Wong else 47886ebd5a44SChristoph Hellwig got.br_state = XFS_EXT_NORM; 47896ebd5a44SChristoph Hellwig 47907cf199baSDarrick J. Wong error = xfs_bmap_add_extent_hole_real(tp, ip, whichfork, &icur, 479192f9da30SBrian Foster &cur, &got, &logflags, flags); 47926ebd5a44SChristoph Hellwig if (error) 47936ebd5a44SChristoph Hellwig goto error0; 47946ebd5a44SChristoph Hellwig 4795b101e334SChristoph Hellwig error = xfs_bmap_btree_to_extents(tp, ip, cur, &logflags, whichfork); 47966ebd5a44SChristoph Hellwig 47976ebd5a44SChristoph Hellwig error0: 4798f7e67b20SChristoph Hellwig if (ip->i_df.if_format != XFS_DINODE_FMT_EXTENTS) 47996ebd5a44SChristoph Hellwig logflags &= ~XFS_ILOG_DEXT; 4800f7e67b20SChristoph Hellwig else if (ip->i_df.if_format != XFS_DINODE_FMT_BTREE) 48016ebd5a44SChristoph Hellwig logflags &= ~XFS_ILOG_DBROOT; 48026ebd5a44SChristoph Hellwig 48036ebd5a44SChristoph Hellwig if (logflags) 48046ebd5a44SChristoph Hellwig xfs_trans_log_inode(tp, ip, logflags); 48050b04b6b8SDarrick J. Wong if (cur) 48060b04b6b8SDarrick J. Wong xfs_btree_del_cursor(cur, error); 48076ebd5a44SChristoph Hellwig return error; 48086ebd5a44SChristoph Hellwig } 48096ebd5a44SChristoph Hellwig 481030f712c9SDave Chinner /* 4811a9bd24acSBrian Foster * When a delalloc extent is split (e.g., due to a hole punch), the original 4812a9bd24acSBrian Foster * indlen reservation must be shared across the two new extents that are left 4813a9bd24acSBrian Foster * behind. 4814a9bd24acSBrian Foster * 4815a9bd24acSBrian Foster * Given the original reservation and the worst case indlen for the two new 4816a9bd24acSBrian Foster * extents (as calculated by xfs_bmap_worst_indlen()), split the original 4817d34999c9SBrian Foster * reservation fairly across the two new extents. If necessary, steal available 4818d34999c9SBrian Foster * blocks from a deleted extent to make up a reservation deficiency (e.g., if 4819d34999c9SBrian Foster * ores == 1). The number of stolen blocks is returned. The availability and 4820d34999c9SBrian Foster * subsequent accounting of stolen blocks is the responsibility of the caller. 4821a9bd24acSBrian Foster */ 4822d34999c9SBrian Foster static xfs_filblks_t 4823a9bd24acSBrian Foster xfs_bmap_split_indlen( 4824a9bd24acSBrian Foster xfs_filblks_t ores, /* original res. */ 4825a9bd24acSBrian Foster xfs_filblks_t *indlen1, /* ext1 worst indlen */ 4826d34999c9SBrian Foster xfs_filblks_t *indlen2, /* ext2 worst indlen */ 4827d34999c9SBrian Foster xfs_filblks_t avail) /* stealable blocks */ 4828a9bd24acSBrian Foster { 4829a9bd24acSBrian Foster xfs_filblks_t len1 = *indlen1; 4830a9bd24acSBrian Foster xfs_filblks_t len2 = *indlen2; 4831a9bd24acSBrian Foster xfs_filblks_t nres = len1 + len2; /* new total res. */ 4832d34999c9SBrian Foster xfs_filblks_t stolen = 0; 483375d65361SBrian Foster xfs_filblks_t resfactor; 4834a9bd24acSBrian Foster 4835a9bd24acSBrian Foster /* 4836d34999c9SBrian Foster * Steal as many blocks as we can to try and satisfy the worst case 4837d34999c9SBrian Foster * indlen for both new extents. 4838d34999c9SBrian Foster */ 483975d65361SBrian Foster if (ores < nres && avail) 484075d65361SBrian Foster stolen = XFS_FILBLKS_MIN(nres - ores, avail); 484175d65361SBrian Foster ores += stolen; 484275d65361SBrian Foster 484375d65361SBrian Foster /* nothing else to do if we've satisfied the new reservation */ 484475d65361SBrian Foster if (ores >= nres) 484575d65361SBrian Foster return stolen; 4846d34999c9SBrian Foster 4847d34999c9SBrian Foster /* 484875d65361SBrian Foster * We can't meet the total required reservation for the two extents. 484975d65361SBrian Foster * Calculate the percent of the overall shortage between both extents 485075d65361SBrian Foster * and apply this percentage to each of the requested indlen values. 485175d65361SBrian Foster * This distributes the shortage fairly and reduces the chances that one 485275d65361SBrian Foster * of the two extents is left with nothing when extents are repeatedly 485375d65361SBrian Foster * split. 4854a9bd24acSBrian Foster */ 485575d65361SBrian Foster resfactor = (ores * 100); 485675d65361SBrian Foster do_div(resfactor, nres); 485775d65361SBrian Foster len1 *= resfactor; 485875d65361SBrian Foster do_div(len1, 100); 485975d65361SBrian Foster len2 *= resfactor; 486075d65361SBrian Foster do_div(len2, 100); 486175d65361SBrian Foster ASSERT(len1 + len2 <= ores); 486275d65361SBrian Foster ASSERT(len1 < *indlen1 && len2 < *indlen2); 486375d65361SBrian Foster 486475d65361SBrian Foster /* 486575d65361SBrian Foster * Hand out the remainder to each extent. If one of the two reservations 486675d65361SBrian Foster * is zero, we want to make sure that one gets a block first. The loop 486775d65361SBrian Foster * below starts with len1, so hand len2 a block right off the bat if it 486875d65361SBrian Foster * is zero. 486975d65361SBrian Foster */ 487075d65361SBrian Foster ores -= (len1 + len2); 487175d65361SBrian Foster ASSERT((*indlen1 - len1) + (*indlen2 - len2) >= ores); 487275d65361SBrian Foster if (ores && !len2 && *indlen2) { 487375d65361SBrian Foster len2++; 487475d65361SBrian Foster ores--; 4875a9bd24acSBrian Foster } 487675d65361SBrian Foster while (ores) { 487775d65361SBrian Foster if (len1 < *indlen1) { 487875d65361SBrian Foster len1++; 487975d65361SBrian Foster ores--; 488075d65361SBrian Foster } 488175d65361SBrian Foster if (!ores) 4882a9bd24acSBrian Foster break; 488375d65361SBrian Foster if (len2 < *indlen2) { 488475d65361SBrian Foster len2++; 488575d65361SBrian Foster ores--; 4886a9bd24acSBrian Foster } 4887a9bd24acSBrian Foster } 4888a9bd24acSBrian Foster 4889a9bd24acSBrian Foster *indlen1 = len1; 4890a9bd24acSBrian Foster *indlen2 = len2; 4891d34999c9SBrian Foster 4892d34999c9SBrian Foster return stolen; 4893a9bd24acSBrian Foster } 4894a9bd24acSBrian Foster 4895fa5c836cSChristoph Hellwig int 4896fa5c836cSChristoph Hellwig xfs_bmap_del_extent_delay( 4897fa5c836cSChristoph Hellwig struct xfs_inode *ip, 4898fa5c836cSChristoph Hellwig int whichfork, 4899b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 4900fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 4901fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 4902fa5c836cSChristoph Hellwig { 4903fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 4904fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 4905fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 4906fa5c836cSChristoph Hellwig int64_t da_old, da_new, da_diff = 0; 4907fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 4908fa5c836cSChristoph Hellwig xfs_filblks_t got_indlen, new_indlen, stolen; 4909060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 4910060ea65bSChristoph Hellwig int error = 0; 4911fa5c836cSChristoph Hellwig bool isrt; 4912fa5c836cSChristoph Hellwig 4913fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 4914fa5c836cSChristoph Hellwig 4915fa5c836cSChristoph Hellwig isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 4916fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 4917fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 4918fa5c836cSChristoph Hellwig da_old = startblockval(got->br_startblock); 4919fa5c836cSChristoph Hellwig da_new = 0; 4920fa5c836cSChristoph Hellwig 4921fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 4922fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 4923fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 4924fa5c836cSChristoph Hellwig 4925fa5c836cSChristoph Hellwig if (isrt) { 49264f1adf33SEric Sandeen uint64_t rtexts = XFS_FSB_TO_B(mp, del->br_blockcount); 4927fa5c836cSChristoph Hellwig 4928fa5c836cSChristoph Hellwig do_div(rtexts, mp->m_sb.sb_rextsize); 4929fa5c836cSChristoph Hellwig xfs_mod_frextents(mp, rtexts); 4930fa5c836cSChristoph Hellwig } 4931fa5c836cSChristoph Hellwig 4932fa5c836cSChristoph Hellwig /* 4933fa5c836cSChristoph Hellwig * Update the inode delalloc counter now and wait to update the 4934fa5c836cSChristoph Hellwig * sb counters as we might have to borrow some blocks for the 4935fa5c836cSChristoph Hellwig * indirect block accounting. 4936fa5c836cSChristoph Hellwig */ 493785546500SDarrick J. Wong ASSERT(!isrt); 493885546500SDarrick J. Wong error = xfs_quota_unreserve_blkres(ip, del->br_blockcount); 49394fd29ec4SDarrick J. Wong if (error) 49404fd29ec4SDarrick J. Wong return error; 4941fa5c836cSChristoph Hellwig ip->i_delayed_blks -= del->br_blockcount; 4942fa5c836cSChristoph Hellwig 4943fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 49440173c689SChristoph Hellwig state |= BMAP_LEFT_FILLING; 4945fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 49460173c689SChristoph Hellwig state |= BMAP_RIGHT_FILLING; 4947fa5c836cSChristoph Hellwig 49480173c689SChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 49490173c689SChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 4950fa5c836cSChristoph Hellwig /* 4951fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 4952fa5c836cSChristoph Hellwig */ 4953c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 4954b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 4955fa5c836cSChristoph Hellwig break; 49560173c689SChristoph Hellwig case BMAP_LEFT_FILLING: 4957fa5c836cSChristoph Hellwig /* 4958fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 4959fa5c836cSChristoph Hellwig */ 4960fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 4961fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 4962fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4963fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4964fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 4965b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4966fa5c836cSChristoph Hellwig break; 49670173c689SChristoph Hellwig case BMAP_RIGHT_FILLING: 4968fa5c836cSChristoph Hellwig /* 4969fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 4970fa5c836cSChristoph Hellwig */ 4971fa5c836cSChristoph Hellwig got->br_blockcount = got->br_blockcount - del->br_blockcount; 4972fa5c836cSChristoph Hellwig da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, 4973fa5c836cSChristoph Hellwig got->br_blockcount), da_old); 4974fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)da_new); 4975b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 4976fa5c836cSChristoph Hellwig break; 4977fa5c836cSChristoph Hellwig case 0: 4978fa5c836cSChristoph Hellwig /* 4979fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 4980fa5c836cSChristoph Hellwig * 4981fa5c836cSChristoph Hellwig * Distribute the original indlen reservation across the two new 4982fa5c836cSChristoph Hellwig * extents. Steal blocks from the deleted extent if necessary. 4983fa5c836cSChristoph Hellwig * Stealing blocks simply fudges the fdblocks accounting below. 4984fa5c836cSChristoph Hellwig * Warn if either of the new indlen reservations is zero as this 4985fa5c836cSChristoph Hellwig * can lead to delalloc problems. 4986fa5c836cSChristoph Hellwig */ 4987fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 4988fa5c836cSChristoph Hellwig got_indlen = xfs_bmap_worst_indlen(ip, got->br_blockcount); 4989fa5c836cSChristoph Hellwig 4990fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 4991fa5c836cSChristoph Hellwig new_indlen = xfs_bmap_worst_indlen(ip, new.br_blockcount); 4992fa5c836cSChristoph Hellwig 4993fa5c836cSChristoph Hellwig WARN_ON_ONCE(!got_indlen || !new_indlen); 4994fa5c836cSChristoph Hellwig stolen = xfs_bmap_split_indlen(da_old, &got_indlen, &new_indlen, 4995fa5c836cSChristoph Hellwig del->br_blockcount); 4996fa5c836cSChristoph Hellwig 4997fa5c836cSChristoph Hellwig got->br_startblock = nullstartblock((int)got_indlen); 4998fa5c836cSChristoph Hellwig 4999fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 5000fa5c836cSChristoph Hellwig new.br_state = got->br_state; 5001fa5c836cSChristoph Hellwig new.br_startblock = nullstartblock((int)new_indlen); 5002fa5c836cSChristoph Hellwig 5003b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 5004b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 50050254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &new, state); 5006fa5c836cSChristoph Hellwig 5007fa5c836cSChristoph Hellwig da_new = got_indlen + new_indlen - stolen; 5008fa5c836cSChristoph Hellwig del->br_blockcount -= stolen; 5009fa5c836cSChristoph Hellwig break; 5010fa5c836cSChristoph Hellwig } 5011fa5c836cSChristoph Hellwig 5012fa5c836cSChristoph Hellwig ASSERT(da_old >= da_new); 5013fa5c836cSChristoph Hellwig da_diff = da_old - da_new; 5014fa5c836cSChristoph Hellwig if (!isrt) 5015fa5c836cSChristoph Hellwig da_diff += del->br_blockcount; 50169fe82b8cSDarrick J. Wong if (da_diff) { 5017fa5c836cSChristoph Hellwig xfs_mod_fdblocks(mp, da_diff, false); 50189fe82b8cSDarrick J. Wong xfs_mod_delalloc(mp, -da_diff); 50199fe82b8cSDarrick J. Wong } 5020fa5c836cSChristoph Hellwig return error; 5021fa5c836cSChristoph Hellwig } 5022fa5c836cSChristoph Hellwig 5023fa5c836cSChristoph Hellwig void 5024fa5c836cSChristoph Hellwig xfs_bmap_del_extent_cow( 5025fa5c836cSChristoph Hellwig struct xfs_inode *ip, 5026b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 5027fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *got, 5028fa5c836cSChristoph Hellwig struct xfs_bmbt_irec *del) 5029fa5c836cSChristoph Hellwig { 5030fa5c836cSChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 5031fa5c836cSChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); 5032fa5c836cSChristoph Hellwig struct xfs_bmbt_irec new; 5033fa5c836cSChristoph Hellwig xfs_fileoff_t del_endoff, got_endoff; 5034fa5c836cSChristoph Hellwig int state = BMAP_COWFORK; 5035fa5c836cSChristoph Hellwig 5036fa5c836cSChristoph Hellwig XFS_STATS_INC(mp, xs_del_exlist); 5037fa5c836cSChristoph Hellwig 5038fa5c836cSChristoph Hellwig del_endoff = del->br_startoff + del->br_blockcount; 5039fa5c836cSChristoph Hellwig got_endoff = got->br_startoff + got->br_blockcount; 5040fa5c836cSChristoph Hellwig 5041fa5c836cSChristoph Hellwig ASSERT(del->br_blockcount > 0); 5042fa5c836cSChristoph Hellwig ASSERT(got->br_startoff <= del->br_startoff); 5043fa5c836cSChristoph Hellwig ASSERT(got_endoff >= del_endoff); 5044fa5c836cSChristoph Hellwig ASSERT(!isnullstartblock(got->br_startblock)); 5045fa5c836cSChristoph Hellwig 5046fa5c836cSChristoph Hellwig if (got->br_startoff == del->br_startoff) 50470173c689SChristoph Hellwig state |= BMAP_LEFT_FILLING; 5048fa5c836cSChristoph Hellwig if (got_endoff == del_endoff) 50490173c689SChristoph Hellwig state |= BMAP_RIGHT_FILLING; 5050fa5c836cSChristoph Hellwig 50510173c689SChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 50520173c689SChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 5053fa5c836cSChristoph Hellwig /* 5054fa5c836cSChristoph Hellwig * Matches the whole extent. Delete the entry. 5055fa5c836cSChristoph Hellwig */ 5056c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 5057b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 5058fa5c836cSChristoph Hellwig break; 50590173c689SChristoph Hellwig case BMAP_LEFT_FILLING: 5060fa5c836cSChristoph Hellwig /* 5061fa5c836cSChristoph Hellwig * Deleting the first part of the extent. 5062fa5c836cSChristoph Hellwig */ 5063fa5c836cSChristoph Hellwig got->br_startoff = del_endoff; 5064fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 5065fa5c836cSChristoph Hellwig got->br_startblock = del->br_startblock + del->br_blockcount; 5066b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 5067fa5c836cSChristoph Hellwig break; 50680173c689SChristoph Hellwig case BMAP_RIGHT_FILLING: 5069fa5c836cSChristoph Hellwig /* 5070fa5c836cSChristoph Hellwig * Deleting the last part of the extent. 5071fa5c836cSChristoph Hellwig */ 5072fa5c836cSChristoph Hellwig got->br_blockcount -= del->br_blockcount; 5073b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 5074fa5c836cSChristoph Hellwig break; 5075fa5c836cSChristoph Hellwig case 0: 5076fa5c836cSChristoph Hellwig /* 5077fa5c836cSChristoph Hellwig * Deleting the middle of the extent. 5078fa5c836cSChristoph Hellwig */ 5079fa5c836cSChristoph Hellwig got->br_blockcount = del->br_startoff - got->br_startoff; 5080fa5c836cSChristoph Hellwig 5081fa5c836cSChristoph Hellwig new.br_startoff = del_endoff; 5082fa5c836cSChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 5083fa5c836cSChristoph Hellwig new.br_state = got->br_state; 5084fa5c836cSChristoph Hellwig new.br_startblock = del->br_startblock + del->br_blockcount; 5085fa5c836cSChristoph Hellwig 5086b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, got); 5087b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 50880254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &new, state); 5089fa5c836cSChristoph Hellwig break; 5090fa5c836cSChristoph Hellwig } 50914b4c1326SDarrick J. Wong ip->i_delayed_blks -= del->br_blockcount; 5092fa5c836cSChristoph Hellwig } 5093fa5c836cSChristoph Hellwig 5094a9bd24acSBrian Foster /* 509530f712c9SDave Chinner * Called by xfs_bmapi to update file extent records and the btree 5096e1d7553fSChristoph Hellwig * after removing space. 509730f712c9SDave Chinner */ 509830f712c9SDave Chinner STATIC int /* error */ 5099e1d7553fSChristoph Hellwig xfs_bmap_del_extent_real( 510030f712c9SDave Chinner xfs_inode_t *ip, /* incore inode pointer */ 510130f712c9SDave Chinner xfs_trans_t *tp, /* current transaction pointer */ 5102b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 510330f712c9SDave Chinner xfs_btree_cur_t *cur, /* if null, not a btree */ 510430f712c9SDave Chinner xfs_bmbt_irec_t *del, /* data to remove from extents */ 510530f712c9SDave Chinner int *logflagsp, /* inode logging flags */ 51064847acf8SDarrick J. Wong int whichfork, /* data or attr fork */ 51074847acf8SDarrick J. Wong int bflags) /* bmapi flags */ 510830f712c9SDave Chinner { 510930f712c9SDave Chinner xfs_fsblock_t del_endblock=0; /* first block past del */ 511030f712c9SDave Chinner xfs_fileoff_t del_endoff; /* first offset past del */ 511130f712c9SDave Chinner int do_fx; /* free extent at end of routine */ 511230f712c9SDave Chinner int error; /* error return value */ 51131b24b633SChristoph Hellwig int flags = 0;/* inode logging flags */ 511448fd52b1SChristoph Hellwig struct xfs_bmbt_irec got; /* current extent entry */ 511530f712c9SDave Chinner xfs_fileoff_t got_endoff; /* first offset past got */ 511630f712c9SDave Chinner int i; /* temp state */ 51173ba738dfSChristoph Hellwig struct xfs_ifork *ifp; /* inode fork pointer */ 511830f712c9SDave Chinner xfs_mount_t *mp; /* mount structure */ 511930f712c9SDave Chinner xfs_filblks_t nblks; /* quota/sb block count */ 512030f712c9SDave Chinner xfs_bmbt_irec_t new; /* new record to be inserted */ 512130f712c9SDave Chinner /* REFERENCED */ 512230f712c9SDave Chinner uint qfield; /* quota field to update */ 5123060ea65bSChristoph Hellwig int state = xfs_bmap_fork_to_state(whichfork); 512448fd52b1SChristoph Hellwig struct xfs_bmbt_irec old; 512530f712c9SDave Chinner 5126ff6d6af2SBill O'Donnell mp = ip->i_mount; 5127ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_del_exlist); 512830f712c9SDave Chinner 512930f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 513030f712c9SDave Chinner ASSERT(del->br_blockcount > 0); 5131b2b1712aSChristoph Hellwig xfs_iext_get_extent(ifp, icur, &got); 513230f712c9SDave Chinner ASSERT(got.br_startoff <= del->br_startoff); 513330f712c9SDave Chinner del_endoff = del->br_startoff + del->br_blockcount; 513430f712c9SDave Chinner got_endoff = got.br_startoff + got.br_blockcount; 513530f712c9SDave Chinner ASSERT(got_endoff >= del_endoff); 5136e1d7553fSChristoph Hellwig ASSERT(!isnullstartblock(got.br_startblock)); 513730f712c9SDave Chinner qfield = 0; 513830f712c9SDave Chinner error = 0; 5139e1d7553fSChristoph Hellwig 51401b24b633SChristoph Hellwig /* 51411b24b633SChristoph Hellwig * If it's the case where the directory code is running with no block 51421b24b633SChristoph Hellwig * reservation, and the deleted block is in the middle of its extent, 51431b24b633SChristoph Hellwig * and the resulting insert of an extent would cause transformation to 51441b24b633SChristoph Hellwig * btree format, then reject it. The calling code will then swap blocks 51451b24b633SChristoph Hellwig * around instead. We have to do this now, rather than waiting for the 51461b24b633SChristoph Hellwig * conversion to btree format, since the transaction will be dirty then. 51471b24b633SChristoph Hellwig */ 51481b24b633SChristoph Hellwig if (tp->t_blk_res == 0 && 5149f7e67b20SChristoph Hellwig ifp->if_format == XFS_DINODE_FMT_EXTENTS && 5150daf83964SChristoph Hellwig ifp->if_nextents >= XFS_IFORK_MAXEXT(ip, whichfork) && 51511b24b633SChristoph Hellwig del->br_startoff > got.br_startoff && del_endoff < got_endoff) 51521b24b633SChristoph Hellwig return -ENOSPC; 51531b24b633SChristoph Hellwig 51541b24b633SChristoph Hellwig flags = XFS_ILOG_CORE; 515530f712c9SDave Chinner if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { 515630f712c9SDave Chinner xfs_filblks_t len; 51570703a8e1SDave Chinner xfs_extlen_t mod; 515830f712c9SDave Chinner 51590703a8e1SDave Chinner len = div_u64_rem(del->br_blockcount, mp->m_sb.sb_rextsize, 51600703a8e1SDave Chinner &mod); 51610703a8e1SDave Chinner ASSERT(mod == 0); 51620703a8e1SDave Chinner 51638df0fa39SDarrick J. Wong if (!(bflags & XFS_BMAPI_REMAP)) { 51648df0fa39SDarrick J. Wong xfs_fsblock_t bno; 51658df0fa39SDarrick J. Wong 51668df0fa39SDarrick J. Wong bno = div_u64_rem(del->br_startblock, 51678df0fa39SDarrick J. Wong mp->m_sb.sb_rextsize, &mod); 51688df0fa39SDarrick J. Wong ASSERT(mod == 0); 51698df0fa39SDarrick J. Wong 517030f712c9SDave Chinner error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); 517130f712c9SDave Chinner if (error) 517230f712c9SDave Chinner goto done; 51738df0fa39SDarrick J. Wong } 51748df0fa39SDarrick J. Wong 517530f712c9SDave Chinner do_fx = 0; 517630f712c9SDave Chinner nblks = len * mp->m_sb.sb_rextsize; 517730f712c9SDave Chinner qfield = XFS_TRANS_DQ_RTBCOUNT; 5178e1d7553fSChristoph Hellwig } else { 517930f712c9SDave Chinner do_fx = 1; 518030f712c9SDave Chinner nblks = del->br_blockcount; 518130f712c9SDave Chinner qfield = XFS_TRANS_DQ_BCOUNT; 518230f712c9SDave Chinner } 5183e1d7553fSChristoph Hellwig 518430f712c9SDave Chinner del_endblock = del->br_startblock + del->br_blockcount; 518530f712c9SDave Chinner if (cur) { 5186e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &got, &i); 5187e1d7553fSChristoph Hellwig if (error) 518830f712c9SDave Chinner goto done; 5189f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 5190f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 5191f9e03706SDarrick J. Wong goto done; 5192f9e03706SDarrick J. Wong } 519330f712c9SDave Chinner } 5194340785ccSDarrick J. Wong 5195491f6f8aSChristoph Hellwig if (got.br_startoff == del->br_startoff) 5196491f6f8aSChristoph Hellwig state |= BMAP_LEFT_FILLING; 5197491f6f8aSChristoph Hellwig if (got_endoff == del_endoff) 5198491f6f8aSChristoph Hellwig state |= BMAP_RIGHT_FILLING; 5199491f6f8aSChristoph Hellwig 5200491f6f8aSChristoph Hellwig switch (state & (BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING)) { 5201491f6f8aSChristoph Hellwig case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: 520230f712c9SDave Chinner /* 520330f712c9SDave Chinner * Matches the whole extent. Delete the entry. 520430f712c9SDave Chinner */ 5205c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, state); 5206b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, icur); 5207daf83964SChristoph Hellwig ifp->if_nextents--; 5208daf83964SChristoph Hellwig 520930f712c9SDave Chinner flags |= XFS_ILOG_CORE; 521030f712c9SDave Chinner if (!cur) { 521130f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 521230f712c9SDave Chinner break; 521330f712c9SDave Chinner } 521430f712c9SDave Chinner if ((error = xfs_btree_delete(cur, &i))) 521530f712c9SDave Chinner goto done; 5216f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 5217f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 5218f9e03706SDarrick J. Wong goto done; 5219f9e03706SDarrick J. Wong } 522030f712c9SDave Chinner break; 5221491f6f8aSChristoph Hellwig case BMAP_LEFT_FILLING: 522230f712c9SDave Chinner /* 522330f712c9SDave Chinner * Deleting the first part of the extent. 522430f712c9SDave Chinner */ 522548fd52b1SChristoph Hellwig got.br_startoff = del_endoff; 522648fd52b1SChristoph Hellwig got.br_startblock = del_endblock; 522748fd52b1SChristoph Hellwig got.br_blockcount -= del->br_blockcount; 5228b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &got); 522930f712c9SDave Chinner if (!cur) { 523030f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 523130f712c9SDave Chinner break; 523230f712c9SDave Chinner } 5233a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 523448fd52b1SChristoph Hellwig if (error) 523530f712c9SDave Chinner goto done; 523630f712c9SDave Chinner break; 5237491f6f8aSChristoph Hellwig case BMAP_RIGHT_FILLING: 523830f712c9SDave Chinner /* 523930f712c9SDave Chinner * Deleting the last part of the extent. 524030f712c9SDave Chinner */ 524148fd52b1SChristoph Hellwig got.br_blockcount -= del->br_blockcount; 5242b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &got); 524330f712c9SDave Chinner if (!cur) { 524430f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 524530f712c9SDave Chinner break; 524630f712c9SDave Chinner } 5247a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 524848fd52b1SChristoph Hellwig if (error) 524930f712c9SDave Chinner goto done; 525030f712c9SDave Chinner break; 525130f712c9SDave Chinner case 0: 525230f712c9SDave Chinner /* 525330f712c9SDave Chinner * Deleting the middle of the extent. 525430f712c9SDave Chinner */ 52550dbc5cb1SChandan Babu R 52560dbc5cb1SChandan Babu R /* 52570dbc5cb1SChandan Babu R * For directories, -ENOSPC is returned since a directory entry 52580dbc5cb1SChandan Babu R * remove operation must not fail due to low extent count 52590dbc5cb1SChandan Babu R * availability. -ENOSPC will be handled by higher layers of XFS 52600dbc5cb1SChandan Babu R * by letting the corresponding empty Data/Free blocks to linger 52610dbc5cb1SChandan Babu R * until a future remove operation. Dabtree blocks would be 52620dbc5cb1SChandan Babu R * swapped with the last block in the leaf space and then the 52630dbc5cb1SChandan Babu R * new last block will be unmapped. 526402092a2fSChandan Babu R * 526502092a2fSChandan Babu R * The above logic also applies to the source directory entry of 526602092a2fSChandan Babu R * a rename operation. 52670dbc5cb1SChandan Babu R */ 52680dbc5cb1SChandan Babu R error = xfs_iext_count_may_overflow(ip, whichfork, 1); 52690dbc5cb1SChandan Babu R if (error) { 52700dbc5cb1SChandan Babu R ASSERT(S_ISDIR(VFS_I(ip)->i_mode) && 52710dbc5cb1SChandan Babu R whichfork == XFS_DATA_FORK); 52720dbc5cb1SChandan Babu R error = -ENOSPC; 52730dbc5cb1SChandan Babu R goto done; 52740dbc5cb1SChandan Babu R } 52750dbc5cb1SChandan Babu R 527648fd52b1SChristoph Hellwig old = got; 5277ca5d8e5bSChristoph Hellwig 527848fd52b1SChristoph Hellwig got.br_blockcount = del->br_startoff - got.br_startoff; 5279b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &got); 528048fd52b1SChristoph Hellwig 528130f712c9SDave Chinner new.br_startoff = del_endoff; 528248fd52b1SChristoph Hellwig new.br_blockcount = got_endoff - del_endoff; 528330f712c9SDave Chinner new.br_state = got.br_state; 528430f712c9SDave Chinner new.br_startblock = del_endblock; 528548fd52b1SChristoph Hellwig 528630f712c9SDave Chinner flags |= XFS_ILOG_CORE; 528730f712c9SDave Chinner if (cur) { 5288a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 5289e1d7553fSChristoph Hellwig if (error) 529030f712c9SDave Chinner goto done; 5291e1d7553fSChristoph Hellwig error = xfs_btree_increment(cur, 0, &i); 5292e1d7553fSChristoph Hellwig if (error) 529330f712c9SDave Chinner goto done; 529430f712c9SDave Chinner cur->bc_rec.b = new; 529530f712c9SDave Chinner error = xfs_btree_insert(cur, &i); 52962451337dSDave Chinner if (error && error != -ENOSPC) 529730f712c9SDave Chinner goto done; 529830f712c9SDave Chinner /* 5299e1d7553fSChristoph Hellwig * If get no-space back from btree insert, it tried a 5300e1d7553fSChristoph Hellwig * split, and we have a zero block reservation. Fix up 5301e1d7553fSChristoph Hellwig * our state and return the error. 530230f712c9SDave Chinner */ 53032451337dSDave Chinner if (error == -ENOSPC) { 530430f712c9SDave Chinner /* 5305e1d7553fSChristoph Hellwig * Reset the cursor, don't trust it after any 5306e1d7553fSChristoph Hellwig * insert operation. 530730f712c9SDave Chinner */ 5308e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &got, &i); 5309e1d7553fSChristoph Hellwig if (error) 531030f712c9SDave Chinner goto done; 5311f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 5312f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 5313f9e03706SDarrick J. Wong goto done; 5314f9e03706SDarrick J. Wong } 531530f712c9SDave Chinner /* 531630f712c9SDave Chinner * Update the btree record back 531730f712c9SDave Chinner * to the original value. 531830f712c9SDave Chinner */ 5319a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &old); 5320e1d7553fSChristoph Hellwig if (error) 532130f712c9SDave Chinner goto done; 532230f712c9SDave Chinner /* 532330f712c9SDave Chinner * Reset the extent record back 532430f712c9SDave Chinner * to the original value. 532530f712c9SDave Chinner */ 5326b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, state, icur, &old); 532730f712c9SDave Chinner flags = 0; 53282451337dSDave Chinner error = -ENOSPC; 532930f712c9SDave Chinner goto done; 533030f712c9SDave Chinner } 5331f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 5332f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 5333f9e03706SDarrick J. Wong goto done; 5334f9e03706SDarrick J. Wong } 533530f712c9SDave Chinner } else 533630f712c9SDave Chinner flags |= xfs_ilog_fext(whichfork); 5337daf83964SChristoph Hellwig 5338daf83964SChristoph Hellwig ifp->if_nextents++; 5339b2b1712aSChristoph Hellwig xfs_iext_next(ifp, icur); 53400254c2f2SChristoph Hellwig xfs_iext_insert(ip, icur, &new, state); 534130f712c9SDave Chinner break; 534230f712c9SDave Chinner } 53439c194644SDarrick J. Wong 53449c194644SDarrick J. Wong /* remove reverse mapping */ 5345bc46ac64SDarrick J. Wong xfs_rmap_unmap_extent(tp, ip, whichfork, del); 53469c194644SDarrick J. Wong 534730f712c9SDave Chinner /* 534830f712c9SDave Chinner * If we need to, add to list of extents to delete. 534930f712c9SDave Chinner */ 53504847acf8SDarrick J. Wong if (do_fx && !(bflags & XFS_BMAPI_REMAP)) { 535162aab20fSDarrick J. Wong if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) { 535274b4c5d4SDarrick J. Wong xfs_refcount_decrease_extent(tp, del); 5353fcb762f5SBrian Foster } else { 53540f37d178SBrian Foster __xfs_bmap_add_free(tp, del->br_startblock, 53554e529339SBrian Foster del->br_blockcount, NULL, 53564e529339SBrian Foster (bflags & XFS_BMAPI_NODISCARD) || 53574e529339SBrian Foster del->br_state == XFS_EXT_UNWRITTEN); 5358fcb762f5SBrian Foster } 5359fcb762f5SBrian Foster } 536062aab20fSDarrick J. Wong 536130f712c9SDave Chinner /* 536230f712c9SDave Chinner * Adjust inode # blocks in the file. 536330f712c9SDave Chinner */ 536430f712c9SDave Chinner if (nblks) 53656e73a545SChristoph Hellwig ip->i_nblocks -= nblks; 536630f712c9SDave Chinner /* 536730f712c9SDave Chinner * Adjust quota data. 536830f712c9SDave Chinner */ 53694847acf8SDarrick J. Wong if (qfield && !(bflags & XFS_BMAPI_REMAP)) 537030f712c9SDave Chinner xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); 537130f712c9SDave Chinner 537230f712c9SDave Chinner done: 537330f712c9SDave Chinner *logflagsp = flags; 537430f712c9SDave Chinner return error; 537530f712c9SDave Chinner } 537630f712c9SDave Chinner 537730f712c9SDave Chinner /* 537830f712c9SDave Chinner * Unmap (remove) blocks from a file. 537930f712c9SDave Chinner * If nexts is nonzero then the number of extents to remove is limited to 538030f712c9SDave Chinner * that value. If not all extents in the block range can be removed then 538130f712c9SDave Chinner * *done is set. 538230f712c9SDave Chinner */ 538330f712c9SDave Chinner int /* error */ 53844453593bSDarrick J. Wong __xfs_bunmapi( 5385ccd9d911SBrian Foster struct xfs_trans *tp, /* transaction pointer */ 538630f712c9SDave Chinner struct xfs_inode *ip, /* incore inode */ 53878280f6edSChristoph Hellwig xfs_fileoff_t start, /* first file offset deleted */ 53884453593bSDarrick J. Wong xfs_filblks_t *rlen, /* i/o: amount remaining */ 538930f712c9SDave Chinner int flags, /* misc flags */ 53902af52842SBrian Foster xfs_extnum_t nexts) /* number of extents max */ 539130f712c9SDave Chinner { 5392ccd9d911SBrian Foster struct xfs_btree_cur *cur; /* bmap btree cursor */ 5393ccd9d911SBrian Foster struct xfs_bmbt_irec del; /* extent being deleted */ 539430f712c9SDave Chinner int error; /* error return value */ 539530f712c9SDave Chinner xfs_extnum_t extno; /* extent number in list */ 5396ccd9d911SBrian Foster struct xfs_bmbt_irec got; /* current extent record */ 53973ba738dfSChristoph Hellwig struct xfs_ifork *ifp; /* inode fork pointer */ 539830f712c9SDave Chinner int isrt; /* freeing in rt area */ 539930f712c9SDave Chinner int logflags; /* transaction logging flags */ 540030f712c9SDave Chinner xfs_extlen_t mod; /* rt extent offset */ 5401a71895c5SDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 540230f712c9SDave Chinner int tmp_logflags; /* partial logging flags */ 540330f712c9SDave Chinner int wasdel; /* was a delayed alloc extent */ 540430f712c9SDave Chinner int whichfork; /* data or attribute fork */ 540530f712c9SDave Chinner xfs_fsblock_t sum; 54064453593bSDarrick J. Wong xfs_filblks_t len = *rlen; /* length to unmap in file */ 5407e1a4e37cSDarrick J. Wong xfs_fileoff_t max_len; 54085b094d6dSChristoph Hellwig xfs_agnumber_t prev_agno = NULLAGNUMBER, agno; 54098280f6edSChristoph Hellwig xfs_fileoff_t end; 5410b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 5411b2b1712aSChristoph Hellwig bool done = false; 541230f712c9SDave Chinner 54138280f6edSChristoph Hellwig trace_xfs_bunmap(ip, start, len, flags, _RET_IP_); 541430f712c9SDave Chinner 54153993baebSDarrick J. Wong whichfork = xfs_bmapi_whichfork(flags); 54163993baebSDarrick J. Wong ASSERT(whichfork != XFS_COW_FORK); 541730f712c9SDave Chinner ifp = XFS_IFORK_PTR(ip, whichfork); 5418f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp))) 54192451337dSDave Chinner return -EFSCORRUPTED; 542030f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 54212451337dSDave Chinner return -EIO; 542230f712c9SDave Chinner 542330f712c9SDave Chinner ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 542430f712c9SDave Chinner ASSERT(len > 0); 542530f712c9SDave Chinner ASSERT(nexts >= 0); 542630f712c9SDave Chinner 5427e1a4e37cSDarrick J. Wong /* 5428e1a4e37cSDarrick J. Wong * Guesstimate how many blocks we can unmap without running the risk of 5429e1a4e37cSDarrick J. Wong * blowing out the transaction with a mix of EFIs and reflink 5430e1a4e37cSDarrick J. Wong * adjustments. 5431e1a4e37cSDarrick J. Wong */ 54328c57b886SDarrick J. Wong if (tp && xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) 5433e1a4e37cSDarrick J. Wong max_len = min(len, xfs_refcount_max_unmap(tp->t_log_res)); 5434e1a4e37cSDarrick J. Wong else 5435e1a4e37cSDarrick J. Wong max_len = len; 5436e1a4e37cSDarrick J. Wong 543730f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS) && 543830f712c9SDave Chinner (error = xfs_iread_extents(tp, ip, whichfork))) 543930f712c9SDave Chinner return error; 54405d829300SEric Sandeen if (xfs_iext_count(ifp) == 0) { 54414453593bSDarrick J. Wong *rlen = 0; 544230f712c9SDave Chinner return 0; 544330f712c9SDave Chinner } 5444ff6d6af2SBill O'Donnell XFS_STATS_INC(mp, xs_blk_unmap); 544530f712c9SDave Chinner isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); 5446dc56015fSChristoph Hellwig end = start + len; 544730f712c9SDave Chinner 5448b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent_before(ip, ifp, &end, &icur, &got)) { 5449dc56015fSChristoph Hellwig *rlen = 0; 5450dc56015fSChristoph Hellwig return 0; 545130f712c9SDave Chinner } 5452dc56015fSChristoph Hellwig end--; 54537efc7945SChristoph Hellwig 545430f712c9SDave Chinner logflags = 0; 545530f712c9SDave Chinner if (ifp->if_flags & XFS_IFBROOT) { 5456f7e67b20SChristoph Hellwig ASSERT(ifp->if_format == XFS_DINODE_FMT_BTREE); 545730f712c9SDave Chinner cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 545892219c29SDave Chinner cur->bc_ino.flags = 0; 545930f712c9SDave Chinner } else 546030f712c9SDave Chinner cur = NULL; 546130f712c9SDave Chinner 546230f712c9SDave Chinner if (isrt) { 546330f712c9SDave Chinner /* 546430f712c9SDave Chinner * Synchronize by locking the bitmap inode. 546530f712c9SDave Chinner */ 5466f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); 546730f712c9SDave Chinner xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); 5468f4a0660dSDarrick J. Wong xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); 5469f4a0660dSDarrick J. Wong xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); 547030f712c9SDave Chinner } 547130f712c9SDave Chinner 547230f712c9SDave Chinner extno = 0; 5473b2b1712aSChristoph Hellwig while (end != (xfs_fileoff_t)-1 && end >= start && 5474e1a4e37cSDarrick J. Wong (nexts == 0 || extno < nexts) && max_len > 0) { 547530f712c9SDave Chinner /* 54768280f6edSChristoph Hellwig * Is the found extent after a hole in which end lives? 547730f712c9SDave Chinner * Just back up to the previous extent, if so. 547830f712c9SDave Chinner */ 5479b2b1712aSChristoph Hellwig if (got.br_startoff > end && 5480b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got)) { 5481b2b1712aSChristoph Hellwig done = true; 548230f712c9SDave Chinner break; 548330f712c9SDave Chinner } 548430f712c9SDave Chinner /* 548530f712c9SDave Chinner * Is the last block of this extent before the range 548630f712c9SDave Chinner * we're supposed to delete? If so, we're done. 548730f712c9SDave Chinner */ 54888280f6edSChristoph Hellwig end = XFS_FILEOFF_MIN(end, 548930f712c9SDave Chinner got.br_startoff + got.br_blockcount - 1); 54908280f6edSChristoph Hellwig if (end < start) 549130f712c9SDave Chinner break; 549230f712c9SDave Chinner /* 549330f712c9SDave Chinner * Then deal with the (possibly delayed) allocated space 549430f712c9SDave Chinner * we found. 549530f712c9SDave Chinner */ 549630f712c9SDave Chinner del = got; 549730f712c9SDave Chinner wasdel = isnullstartblock(del.br_startblock); 54985b094d6dSChristoph Hellwig 54995b094d6dSChristoph Hellwig /* 55005b094d6dSChristoph Hellwig * Make sure we don't touch multiple AGF headers out of order 55015b094d6dSChristoph Hellwig * in a single transaction, as that could cause AB-BA deadlocks. 55025b094d6dSChristoph Hellwig */ 550369ffe596SOmar Sandoval if (!wasdel && !isrt) { 55045b094d6dSChristoph Hellwig agno = XFS_FSB_TO_AGNO(mp, del.br_startblock); 55055b094d6dSChristoph Hellwig if (prev_agno != NULLAGNUMBER && prev_agno > agno) 55065b094d6dSChristoph Hellwig break; 55075b094d6dSChristoph Hellwig prev_agno = agno; 55085b094d6dSChristoph Hellwig } 550930f712c9SDave Chinner if (got.br_startoff < start) { 551030f712c9SDave Chinner del.br_startoff = start; 551130f712c9SDave Chinner del.br_blockcount -= start - got.br_startoff; 551230f712c9SDave Chinner if (!wasdel) 551330f712c9SDave Chinner del.br_startblock += start - got.br_startoff; 551430f712c9SDave Chinner } 55158280f6edSChristoph Hellwig if (del.br_startoff + del.br_blockcount > end + 1) 55168280f6edSChristoph Hellwig del.br_blockcount = end + 1 - del.br_startoff; 5517e1a4e37cSDarrick J. Wong 5518e1a4e37cSDarrick J. Wong /* How much can we safely unmap? */ 5519e1a4e37cSDarrick J. Wong if (max_len < del.br_blockcount) { 5520e1a4e37cSDarrick J. Wong del.br_startoff += del.br_blockcount - max_len; 5521e1a4e37cSDarrick J. Wong if (!wasdel) 5522e1a4e37cSDarrick J. Wong del.br_startblock += del.br_blockcount - max_len; 5523e1a4e37cSDarrick J. Wong del.br_blockcount = max_len; 5524e1a4e37cSDarrick J. Wong } 5525e1a4e37cSDarrick J. Wong 55260703a8e1SDave Chinner if (!isrt) 55270703a8e1SDave Chinner goto delete; 55280703a8e1SDave Chinner 552930f712c9SDave Chinner sum = del.br_startblock + del.br_blockcount; 55300703a8e1SDave Chinner div_u64_rem(sum, mp->m_sb.sb_rextsize, &mod); 55310703a8e1SDave Chinner if (mod) { 553230f712c9SDave Chinner /* 553330f712c9SDave Chinner * Realtime extent not lined up at the end. 553430f712c9SDave Chinner * The extent could have been split into written 553530f712c9SDave Chinner * and unwritten pieces, or we could just be 553630f712c9SDave Chinner * unmapping part of it. But we can't really 553730f712c9SDave Chinner * get rid of part of a realtime extent. 553830f712c9SDave Chinner */ 5539daa79baeSChristoph Hellwig if (del.br_state == XFS_EXT_UNWRITTEN) { 554030f712c9SDave Chinner /* 554130f712c9SDave Chinner * This piece is unwritten, or we're not 554230f712c9SDave Chinner * using unwritten extents. Skip over it. 554330f712c9SDave Chinner */ 55448280f6edSChristoph Hellwig ASSERT(end >= mod); 55458280f6edSChristoph Hellwig end -= mod > del.br_blockcount ? 554630f712c9SDave Chinner del.br_blockcount : mod; 5547b2b1712aSChristoph Hellwig if (end < got.br_startoff && 5548b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got)) { 5549b2b1712aSChristoph Hellwig done = true; 5550b2b1712aSChristoph Hellwig break; 555130f712c9SDave Chinner } 555230f712c9SDave Chinner continue; 555330f712c9SDave Chinner } 555430f712c9SDave Chinner /* 555530f712c9SDave Chinner * It's written, turn it unwritten. 555630f712c9SDave Chinner * This is better than zeroing it. 555730f712c9SDave Chinner */ 555830f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 5559a7e5d03bSChristoph Hellwig ASSERT(tp->t_blk_res > 0); 556030f712c9SDave Chinner /* 556130f712c9SDave Chinner * If this spans a realtime extent boundary, 556230f712c9SDave Chinner * chop it back to the start of the one we end at. 556330f712c9SDave Chinner */ 556430f712c9SDave Chinner if (del.br_blockcount > mod) { 556530f712c9SDave Chinner del.br_startoff += del.br_blockcount - mod; 556630f712c9SDave Chinner del.br_startblock += del.br_blockcount - mod; 556730f712c9SDave Chinner del.br_blockcount = mod; 556830f712c9SDave Chinner } 556930f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 557030f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, ip, 5571b2b1712aSChristoph Hellwig whichfork, &icur, &cur, &del, 557292f9da30SBrian Foster &logflags); 557330f712c9SDave Chinner if (error) 557430f712c9SDave Chinner goto error0; 557530f712c9SDave Chinner goto nodelete; 557630f712c9SDave Chinner } 55770703a8e1SDave Chinner div_u64_rem(del.br_startblock, mp->m_sb.sb_rextsize, &mod); 55780703a8e1SDave Chinner if (mod) { 55790c4da70cSOmar Sandoval xfs_extlen_t off = mp->m_sb.sb_rextsize - mod; 55800c4da70cSOmar Sandoval 558130f712c9SDave Chinner /* 558230f712c9SDave Chinner * Realtime extent is lined up at the end but not 558330f712c9SDave Chinner * at the front. We'll get rid of full extents if 558430f712c9SDave Chinner * we can. 558530f712c9SDave Chinner */ 55860c4da70cSOmar Sandoval if (del.br_blockcount > off) { 55870c4da70cSOmar Sandoval del.br_blockcount -= off; 55880c4da70cSOmar Sandoval del.br_startoff += off; 55890c4da70cSOmar Sandoval del.br_startblock += off; 5590daa79baeSChristoph Hellwig } else if (del.br_startoff == start && 559130f712c9SDave Chinner (del.br_state == XFS_EXT_UNWRITTEN || 5592daa79baeSChristoph Hellwig tp->t_blk_res == 0)) { 559330f712c9SDave Chinner /* 559430f712c9SDave Chinner * Can't make it unwritten. There isn't 559530f712c9SDave Chinner * a full extent here so just skip it. 559630f712c9SDave Chinner */ 55978280f6edSChristoph Hellwig ASSERT(end >= del.br_blockcount); 55988280f6edSChristoph Hellwig end -= del.br_blockcount; 5599b2b1712aSChristoph Hellwig if (got.br_startoff > end && 5600b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got)) { 5601b2b1712aSChristoph Hellwig done = true; 5602b2b1712aSChristoph Hellwig break; 5603b2b1712aSChristoph Hellwig } 560430f712c9SDave Chinner continue; 560530f712c9SDave Chinner } else if (del.br_state == XFS_EXT_UNWRITTEN) { 56067efc7945SChristoph Hellwig struct xfs_bmbt_irec prev; 56070c4da70cSOmar Sandoval xfs_fileoff_t unwrite_start; 56087efc7945SChristoph Hellwig 560930f712c9SDave Chinner /* 561030f712c9SDave Chinner * This one is already unwritten. 561130f712c9SDave Chinner * It must have a written left neighbor. 561230f712c9SDave Chinner * Unwrite the killed part of that one and 561330f712c9SDave Chinner * try again. 561430f712c9SDave Chinner */ 5615b2b1712aSChristoph Hellwig if (!xfs_iext_prev_extent(ifp, &icur, &prev)) 5616b2b1712aSChristoph Hellwig ASSERT(0); 561730f712c9SDave Chinner ASSERT(prev.br_state == XFS_EXT_NORM); 561830f712c9SDave Chinner ASSERT(!isnullstartblock(prev.br_startblock)); 561930f712c9SDave Chinner ASSERT(del.br_startblock == 562030f712c9SDave Chinner prev.br_startblock + prev.br_blockcount); 56210c4da70cSOmar Sandoval unwrite_start = max3(start, 56220c4da70cSOmar Sandoval del.br_startoff - mod, 56230c4da70cSOmar Sandoval prev.br_startoff); 56240c4da70cSOmar Sandoval mod = unwrite_start - prev.br_startoff; 56250c4da70cSOmar Sandoval prev.br_startoff = unwrite_start; 562630f712c9SDave Chinner prev.br_startblock += mod; 56270c4da70cSOmar Sandoval prev.br_blockcount -= mod; 562830f712c9SDave Chinner prev.br_state = XFS_EXT_UNWRITTEN; 562930f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 5630b2b1712aSChristoph Hellwig ip, whichfork, &icur, &cur, 563192f9da30SBrian Foster &prev, &logflags); 563230f712c9SDave Chinner if (error) 563330f712c9SDave Chinner goto error0; 563430f712c9SDave Chinner goto nodelete; 563530f712c9SDave Chinner } else { 563630f712c9SDave Chinner ASSERT(del.br_state == XFS_EXT_NORM); 563730f712c9SDave Chinner del.br_state = XFS_EXT_UNWRITTEN; 563830f712c9SDave Chinner error = xfs_bmap_add_extent_unwritten_real(tp, 5639b2b1712aSChristoph Hellwig ip, whichfork, &icur, &cur, 564092f9da30SBrian Foster &del, &logflags); 564130f712c9SDave Chinner if (error) 564230f712c9SDave Chinner goto error0; 564330f712c9SDave Chinner goto nodelete; 564430f712c9SDave Chinner } 564530f712c9SDave Chinner } 564630f712c9SDave Chinner 56470703a8e1SDave Chinner delete: 5648e1d7553fSChristoph Hellwig if (wasdel) { 5649b2b1712aSChristoph Hellwig error = xfs_bmap_del_extent_delay(ip, whichfork, &icur, 5650e1d7553fSChristoph Hellwig &got, &del); 5651e1d7553fSChristoph Hellwig } else { 565281ba8f3eSBrian Foster error = xfs_bmap_del_extent_real(ip, tp, &icur, cur, 565381ba8f3eSBrian Foster &del, &tmp_logflags, whichfork, 5654e1d7553fSChristoph Hellwig flags); 565530f712c9SDave Chinner logflags |= tmp_logflags; 5656e1d7553fSChristoph Hellwig } 5657e1d7553fSChristoph Hellwig 565830f712c9SDave Chinner if (error) 565930f712c9SDave Chinner goto error0; 5660b2706a05SBrian Foster 5661e1a4e37cSDarrick J. Wong max_len -= del.br_blockcount; 56628280f6edSChristoph Hellwig end = del.br_startoff - 1; 566330f712c9SDave Chinner nodelete: 566430f712c9SDave Chinner /* 566530f712c9SDave Chinner * If not done go on to the next (previous) record. 566630f712c9SDave Chinner */ 56678280f6edSChristoph Hellwig if (end != (xfs_fileoff_t)-1 && end >= start) { 5668b2b1712aSChristoph Hellwig if (!xfs_iext_get_extent(ifp, &icur, &got) || 5669b2b1712aSChristoph Hellwig (got.br_startoff > end && 5670b2b1712aSChristoph Hellwig !xfs_iext_prev_extent(ifp, &icur, &got))) { 5671b2b1712aSChristoph Hellwig done = true; 5672b2b1712aSChristoph Hellwig break; 567330f712c9SDave Chinner } 567430f712c9SDave Chinner extno++; 567530f712c9SDave Chinner } 567630f712c9SDave Chinner } 5677b2b1712aSChristoph Hellwig if (done || end == (xfs_fileoff_t)-1 || end < start) 56784453593bSDarrick J. Wong *rlen = 0; 56794453593bSDarrick J. Wong else 56808280f6edSChristoph Hellwig *rlen = end - start + 1; 568130f712c9SDave Chinner 568230f712c9SDave Chinner /* 568330f712c9SDave Chinner * Convert to a btree if necessary. 568430f712c9SDave Chinner */ 568530f712c9SDave Chinner if (xfs_bmap_needs_btree(ip, whichfork)) { 568630f712c9SDave Chinner ASSERT(cur == NULL); 5687280253d2SBrian Foster error = xfs_bmap_extents_to_btree(tp, ip, &cur, 0, 5688280253d2SBrian Foster &tmp_logflags, whichfork); 568930f712c9SDave Chinner logflags |= tmp_logflags; 5690b101e334SChristoph Hellwig } else { 5691b101e334SChristoph Hellwig error = xfs_bmap_btree_to_extents(tp, ip, cur, &logflags, 569230f712c9SDave Chinner whichfork); 569330f712c9SDave Chinner } 5694b101e334SChristoph Hellwig 569530f712c9SDave Chinner error0: 569630f712c9SDave Chinner /* 569730f712c9SDave Chinner * Log everything. Do this after conversion, there's no point in 569830f712c9SDave Chinner * logging the extent records if we've converted to btree format. 569930f712c9SDave Chinner */ 570030f712c9SDave Chinner if ((logflags & xfs_ilog_fext(whichfork)) && 5701f7e67b20SChristoph Hellwig ifp->if_format != XFS_DINODE_FMT_EXTENTS) 570230f712c9SDave Chinner logflags &= ~xfs_ilog_fext(whichfork); 570330f712c9SDave Chinner else if ((logflags & xfs_ilog_fbroot(whichfork)) && 5704f7e67b20SChristoph Hellwig ifp->if_format != XFS_DINODE_FMT_BTREE) 570530f712c9SDave Chinner logflags &= ~xfs_ilog_fbroot(whichfork); 570630f712c9SDave Chinner /* 570730f712c9SDave Chinner * Log inode even in the error case, if the transaction 570830f712c9SDave Chinner * is dirty we'll need to shut down the filesystem. 570930f712c9SDave Chinner */ 571030f712c9SDave Chinner if (logflags) 571130f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 571230f712c9SDave Chinner if (cur) { 5713cf612de7SBrian Foster if (!error) 571492219c29SDave Chinner cur->bc_ino.allocated = 0; 57150b04b6b8SDarrick J. Wong xfs_btree_del_cursor(cur, error); 571630f712c9SDave Chinner } 571730f712c9SDave Chinner return error; 571830f712c9SDave Chinner } 571930f712c9SDave Chinner 57204453593bSDarrick J. Wong /* Unmap a range of a file. */ 57214453593bSDarrick J. Wong int 57224453593bSDarrick J. Wong xfs_bunmapi( 57234453593bSDarrick J. Wong xfs_trans_t *tp, 57244453593bSDarrick J. Wong struct xfs_inode *ip, 57254453593bSDarrick J. Wong xfs_fileoff_t bno, 57264453593bSDarrick J. Wong xfs_filblks_t len, 57274453593bSDarrick J. Wong int flags, 57284453593bSDarrick J. Wong xfs_extnum_t nexts, 57294453593bSDarrick J. Wong int *done) 57304453593bSDarrick J. Wong { 57314453593bSDarrick J. Wong int error; 57324453593bSDarrick J. Wong 57332af52842SBrian Foster error = __xfs_bunmapi(tp, ip, bno, &len, flags, nexts); 57344453593bSDarrick J. Wong *done = (len == 0); 57354453593bSDarrick J. Wong return error; 57364453593bSDarrick J. Wong } 57374453593bSDarrick J. Wong 573830f712c9SDave Chinner /* 5739ddb19e31SBrian Foster * Determine whether an extent shift can be accomplished by a merge with the 5740ddb19e31SBrian Foster * extent that precedes the target hole of the shift. 5741ddb19e31SBrian Foster */ 5742ddb19e31SBrian Foster STATIC bool 5743ddb19e31SBrian Foster xfs_bmse_can_merge( 5744ddb19e31SBrian Foster struct xfs_bmbt_irec *left, /* preceding extent */ 5745ddb19e31SBrian Foster struct xfs_bmbt_irec *got, /* current extent to shift */ 5746ddb19e31SBrian Foster xfs_fileoff_t shift) /* shift fsb */ 5747ddb19e31SBrian Foster { 5748ddb19e31SBrian Foster xfs_fileoff_t startoff; 5749ddb19e31SBrian Foster 5750ddb19e31SBrian Foster startoff = got->br_startoff - shift; 5751ddb19e31SBrian Foster 5752ddb19e31SBrian Foster /* 5753ddb19e31SBrian Foster * The extent, once shifted, must be adjacent in-file and on-disk with 5754ddb19e31SBrian Foster * the preceding extent. 5755ddb19e31SBrian Foster */ 5756ddb19e31SBrian Foster if ((left->br_startoff + left->br_blockcount != startoff) || 5757ddb19e31SBrian Foster (left->br_startblock + left->br_blockcount != got->br_startblock) || 5758ddb19e31SBrian Foster (left->br_state != got->br_state) || 5759ddb19e31SBrian Foster (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) 5760ddb19e31SBrian Foster return false; 5761ddb19e31SBrian Foster 5762ddb19e31SBrian Foster return true; 5763ddb19e31SBrian Foster } 5764ddb19e31SBrian Foster 5765ddb19e31SBrian Foster /* 5766ddb19e31SBrian Foster * A bmap extent shift adjusts the file offset of an extent to fill a preceding 5767ddb19e31SBrian Foster * hole in the file. If an extent shift would result in the extent being fully 5768ddb19e31SBrian Foster * adjacent to the extent that currently precedes the hole, we can merge with 5769ddb19e31SBrian Foster * the preceding extent rather than do the shift. 5770ddb19e31SBrian Foster * 5771ddb19e31SBrian Foster * This function assumes the caller has verified a shift-by-merge is possible 5772ddb19e31SBrian Foster * with the provided extents via xfs_bmse_can_merge(). 5773ddb19e31SBrian Foster */ 5774ddb19e31SBrian Foster STATIC int 5775ddb19e31SBrian Foster xfs_bmse_merge( 57760f37d178SBrian Foster struct xfs_trans *tp, 5777ddb19e31SBrian Foster struct xfs_inode *ip, 5778ddb19e31SBrian Foster int whichfork, 5779ddb19e31SBrian Foster xfs_fileoff_t shift, /* shift fsb */ 5780b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 57814da6b514SChristoph Hellwig struct xfs_bmbt_irec *got, /* extent to shift */ 57824da6b514SChristoph Hellwig struct xfs_bmbt_irec *left, /* preceding extent */ 5783ddb19e31SBrian Foster struct xfs_btree_cur *cur, 57840f37d178SBrian Foster int *logflags) /* output */ 5785ddb19e31SBrian Foster { 5786daf83964SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 57874da6b514SChristoph Hellwig struct xfs_bmbt_irec new; 5788ddb19e31SBrian Foster xfs_filblks_t blockcount; 5789ddb19e31SBrian Foster int error, i; 57905fb5aeeeSEric Sandeen struct xfs_mount *mp = ip->i_mount; 5791ddb19e31SBrian Foster 57924da6b514SChristoph Hellwig blockcount = left->br_blockcount + got->br_blockcount; 5793ddb19e31SBrian Foster 5794ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 5795ddb19e31SBrian Foster ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 57964da6b514SChristoph Hellwig ASSERT(xfs_bmse_can_merge(left, got, shift)); 5797ddb19e31SBrian Foster 57984da6b514SChristoph Hellwig new = *left; 57994da6b514SChristoph Hellwig new.br_blockcount = blockcount; 5800ddb19e31SBrian Foster 5801ddb19e31SBrian Foster /* 5802ddb19e31SBrian Foster * Update the on-disk extent count, the btree if necessary and log the 5803ddb19e31SBrian Foster * inode. 5804ddb19e31SBrian Foster */ 5805daf83964SChristoph Hellwig ifp->if_nextents--; 5806ddb19e31SBrian Foster *logflags |= XFS_ILOG_CORE; 5807ddb19e31SBrian Foster if (!cur) { 5808ddb19e31SBrian Foster *logflags |= XFS_ILOG_DEXT; 58094da6b514SChristoph Hellwig goto done; 5810ddb19e31SBrian Foster } 5811ddb19e31SBrian Foster 5812ddb19e31SBrian Foster /* lookup and remove the extent to merge */ 5813e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, got, &i); 5814ddb19e31SBrian Foster if (error) 58154db431f5SDave Chinner return error; 5816f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) 5817f9e03706SDarrick J. Wong return -EFSCORRUPTED; 5818ddb19e31SBrian Foster 5819ddb19e31SBrian Foster error = xfs_btree_delete(cur, &i); 5820ddb19e31SBrian Foster if (error) 58214db431f5SDave Chinner return error; 5822f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) 5823f9e03706SDarrick J. Wong return -EFSCORRUPTED; 5824ddb19e31SBrian Foster 5825ddb19e31SBrian Foster /* lookup and update size of the previous extent */ 5826e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, left, &i); 5827ddb19e31SBrian Foster if (error) 58284db431f5SDave Chinner return error; 5829f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) 5830f9e03706SDarrick J. Wong return -EFSCORRUPTED; 5831ddb19e31SBrian Foster 5832a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &new); 58334da6b514SChristoph Hellwig if (error) 58344da6b514SChristoph Hellwig return error; 5835ddb19e31SBrian Foster 5836e20e174cSBrian Foster /* change to extent format if required after extent removal */ 5837e20e174cSBrian Foster error = xfs_bmap_btree_to_extents(tp, ip, cur, logflags, whichfork); 5838e20e174cSBrian Foster if (error) 5839e20e174cSBrian Foster return error; 5840e20e174cSBrian Foster 58414da6b514SChristoph Hellwig done: 5842c38ccf59SChristoph Hellwig xfs_iext_remove(ip, icur, 0); 5843daf83964SChristoph Hellwig xfs_iext_prev(ifp, icur); 5844b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, xfs_bmap_fork_to_state(whichfork), icur, 5845b2b1712aSChristoph Hellwig &new); 58464da6b514SChristoph Hellwig 58474cc1ee5eSDarrick J. Wong /* update reverse mapping. rmap functions merge the rmaps for us */ 5848bc46ac64SDarrick J. Wong xfs_rmap_unmap_extent(tp, ip, whichfork, got); 58494cc1ee5eSDarrick J. Wong memcpy(&new, got, sizeof(new)); 58504cc1ee5eSDarrick J. Wong new.br_startoff = left->br_startoff + left->br_blockcount; 5851bc46ac64SDarrick J. Wong xfs_rmap_map_extent(tp, ip, whichfork, &new); 5852bc46ac64SDarrick J. Wong return 0; 5853ddb19e31SBrian Foster } 5854ddb19e31SBrian Foster 5855bf806280SChristoph Hellwig static int 5856bf806280SChristoph Hellwig xfs_bmap_shift_update_extent( 58570f37d178SBrian Foster struct xfs_trans *tp, 5858a979bdfeSBrian Foster struct xfs_inode *ip, 5859a979bdfeSBrian Foster int whichfork, 5860b2b1712aSChristoph Hellwig struct xfs_iext_cursor *icur, 58614da6b514SChristoph Hellwig struct xfs_bmbt_irec *got, 5862a979bdfeSBrian Foster struct xfs_btree_cur *cur, 5863a904b1caSNamjae Jeon int *logflags, 5864bf806280SChristoph Hellwig xfs_fileoff_t startoff) 5865a979bdfeSBrian Foster { 5866bf806280SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 586711f75b3bSChristoph Hellwig struct xfs_bmbt_irec prev = *got; 5868bf806280SChristoph Hellwig int error, i; 5869a979bdfeSBrian Foster 5870a979bdfeSBrian Foster *logflags |= XFS_ILOG_CORE; 5871a979bdfeSBrian Foster 587211f75b3bSChristoph Hellwig got->br_startoff = startoff; 58734da6b514SChristoph Hellwig 58744da6b514SChristoph Hellwig if (cur) { 587511f75b3bSChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &prev, &i); 5876a979bdfeSBrian Foster if (error) 5877a979bdfeSBrian Foster return error; 5878f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) 5879f9e03706SDarrick J. Wong return -EFSCORRUPTED; 5880a979bdfeSBrian Foster 588111f75b3bSChristoph Hellwig error = xfs_bmbt_update(cur, got); 58829c194644SDarrick J. Wong if (error) 58839c194644SDarrick J. Wong return error; 58844da6b514SChristoph Hellwig } else { 58854da6b514SChristoph Hellwig *logflags |= XFS_ILOG_DEXT; 58864da6b514SChristoph Hellwig } 58879c194644SDarrick J. Wong 5888b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, xfs_bmap_fork_to_state(whichfork), icur, 5889b2b1712aSChristoph Hellwig got); 58904da6b514SChristoph Hellwig 58919c194644SDarrick J. Wong /* update reverse mapping */ 5892bc46ac64SDarrick J. Wong xfs_rmap_unmap_extent(tp, ip, whichfork, &prev); 5893bc46ac64SDarrick J. Wong xfs_rmap_map_extent(tp, ip, whichfork, got); 5894bc46ac64SDarrick J. Wong return 0; 5895a979bdfeSBrian Foster } 5896a979bdfeSBrian Foster 589730f712c9SDave Chinner int 5898ecfea3f0SChristoph Hellwig xfs_bmap_collapse_extents( 589930f712c9SDave Chinner struct xfs_trans *tp, 590030f712c9SDave Chinner struct xfs_inode *ip, 5901a904b1caSNamjae Jeon xfs_fileoff_t *next_fsb, 590230f712c9SDave Chinner xfs_fileoff_t offset_shift_fsb, 5903333f950cSBrian Foster bool *done) 590430f712c9SDave Chinner { 5905ecfea3f0SChristoph Hellwig int whichfork = XFS_DATA_FORK; 5906ecfea3f0SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 5907ecfea3f0SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 5908ca446d88SBrian Foster struct xfs_btree_cur *cur = NULL; 5909bf806280SChristoph Hellwig struct xfs_bmbt_irec got, prev; 5910b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 5911bf806280SChristoph Hellwig xfs_fileoff_t new_startoff; 591230f712c9SDave Chinner int error = 0; 5913ca446d88SBrian Foster int logflags = 0; 591430f712c9SDave Chinner 5915f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp)) || 5916a71895c5SDarrick J. Wong XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BMAPIFORMAT)) { 59172451337dSDave Chinner return -EFSCORRUPTED; 591830f712c9SDave Chinner } 591930f712c9SDave Chinner 592030f712c9SDave Chinner if (XFS_FORCED_SHUTDOWN(mp)) 59212451337dSDave Chinner return -EIO; 592230f712c9SDave Chinner 5923ecfea3f0SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL)); 592430f712c9SDave Chinner 592530f712c9SDave Chinner if (!(ifp->if_flags & XFS_IFEXTENTS)) { 592630f712c9SDave Chinner error = xfs_iread_extents(tp, ip, whichfork); 592730f712c9SDave Chinner if (error) 592830f712c9SDave Chinner return error; 592930f712c9SDave Chinner } 593030f712c9SDave Chinner 5931ddb19e31SBrian Foster if (ifp->if_flags & XFS_IFBROOT) { 5932ddb19e31SBrian Foster cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 593392219c29SDave Chinner cur->bc_ino.flags = 0; 5934ddb19e31SBrian Foster } 5935ddb19e31SBrian Foster 5936b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, *next_fsb, &icur, &got)) { 5937ecfea3f0SChristoph Hellwig *done = true; 5938ecfea3f0SChristoph Hellwig goto del_cursor; 5939ecfea3f0SChristoph Hellwig } 5940f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, isnullstartblock(got.br_startblock))) { 5941f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 5942f9e03706SDarrick J. Wong goto del_cursor; 5943f9e03706SDarrick J. Wong } 5944ecfea3f0SChristoph Hellwig 5945bf806280SChristoph Hellwig new_startoff = got.br_startoff - offset_shift_fsb; 5946b2b1712aSChristoph Hellwig if (xfs_iext_peek_prev_extent(ifp, &icur, &prev)) { 5947bf806280SChristoph Hellwig if (new_startoff < prev.br_startoff + prev.br_blockcount) { 5948bf806280SChristoph Hellwig error = -EINVAL; 5949bf806280SChristoph Hellwig goto del_cursor; 5950bf806280SChristoph Hellwig } 5951bf806280SChristoph Hellwig 5952bf806280SChristoph Hellwig if (xfs_bmse_can_merge(&prev, &got, offset_shift_fsb)) { 59530f37d178SBrian Foster error = xfs_bmse_merge(tp, ip, whichfork, 59540f37d178SBrian Foster offset_shift_fsb, &icur, &got, &prev, 59550f37d178SBrian Foster cur, &logflags); 5956ecfea3f0SChristoph Hellwig if (error) 5957ecfea3f0SChristoph Hellwig goto del_cursor; 5958bf806280SChristoph Hellwig goto done; 5959bf806280SChristoph Hellwig } 5960bf806280SChristoph Hellwig } else { 5961bf806280SChristoph Hellwig if (got.br_startoff < offset_shift_fsb) { 5962bf806280SChristoph Hellwig error = -EINVAL; 5963bf806280SChristoph Hellwig goto del_cursor; 5964bf806280SChristoph Hellwig } 5965bf806280SChristoph Hellwig } 5966bf806280SChristoph Hellwig 59670f37d178SBrian Foster error = xfs_bmap_shift_update_extent(tp, ip, whichfork, &icur, &got, 59680f37d178SBrian Foster cur, &logflags, new_startoff); 5969bf806280SChristoph Hellwig if (error) 5970bf806280SChristoph Hellwig goto del_cursor; 597140591bdbSChristoph Hellwig 597242630361SChristoph Hellwig done: 5973b2b1712aSChristoph Hellwig if (!xfs_iext_next_extent(ifp, &icur, &got)) { 5974ecfea3f0SChristoph Hellwig *done = true; 5975ecfea3f0SChristoph Hellwig goto del_cursor; 5976ecfea3f0SChristoph Hellwig } 5977ecfea3f0SChristoph Hellwig 5978ecfea3f0SChristoph Hellwig *next_fsb = got.br_startoff; 5979ecfea3f0SChristoph Hellwig del_cursor: 5980ecfea3f0SChristoph Hellwig if (cur) 59810b04b6b8SDarrick J. Wong xfs_btree_del_cursor(cur, error); 5982ecfea3f0SChristoph Hellwig if (logflags) 5983ecfea3f0SChristoph Hellwig xfs_trans_log_inode(tp, ip, logflags); 5984ecfea3f0SChristoph Hellwig return error; 5985ecfea3f0SChristoph Hellwig } 5986ecfea3f0SChristoph Hellwig 5987f62cb48eSDarrick J. Wong /* Make sure we won't be right-shifting an extent past the maximum bound. */ 5988f62cb48eSDarrick J. Wong int 5989f62cb48eSDarrick J. Wong xfs_bmap_can_insert_extents( 5990f62cb48eSDarrick J. Wong struct xfs_inode *ip, 5991f62cb48eSDarrick J. Wong xfs_fileoff_t off, 5992f62cb48eSDarrick J. Wong xfs_fileoff_t shift) 5993f62cb48eSDarrick J. Wong { 5994f62cb48eSDarrick J. Wong struct xfs_bmbt_irec got; 5995f62cb48eSDarrick J. Wong int is_empty; 5996f62cb48eSDarrick J. Wong int error = 0; 5997f62cb48eSDarrick J. Wong 5998f62cb48eSDarrick J. Wong ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); 5999f62cb48eSDarrick J. Wong 6000f62cb48eSDarrick J. Wong if (XFS_FORCED_SHUTDOWN(ip->i_mount)) 6001f62cb48eSDarrick J. Wong return -EIO; 6002f62cb48eSDarrick J. Wong 6003f62cb48eSDarrick J. Wong xfs_ilock(ip, XFS_ILOCK_EXCL); 6004f62cb48eSDarrick J. Wong error = xfs_bmap_last_extent(NULL, ip, XFS_DATA_FORK, &got, &is_empty); 6005f62cb48eSDarrick J. Wong if (!error && !is_empty && got.br_startoff >= off && 6006f62cb48eSDarrick J. Wong ((got.br_startoff + shift) & BMBT_STARTOFF_MASK) < got.br_startoff) 6007f62cb48eSDarrick J. Wong error = -EINVAL; 6008f62cb48eSDarrick J. Wong xfs_iunlock(ip, XFS_ILOCK_EXCL); 6009f62cb48eSDarrick J. Wong 6010f62cb48eSDarrick J. Wong return error; 6011f62cb48eSDarrick J. Wong } 6012f62cb48eSDarrick J. Wong 6013ecfea3f0SChristoph Hellwig int 6014ecfea3f0SChristoph Hellwig xfs_bmap_insert_extents( 6015ecfea3f0SChristoph Hellwig struct xfs_trans *tp, 6016ecfea3f0SChristoph Hellwig struct xfs_inode *ip, 6017ecfea3f0SChristoph Hellwig xfs_fileoff_t *next_fsb, 6018ecfea3f0SChristoph Hellwig xfs_fileoff_t offset_shift_fsb, 6019ecfea3f0SChristoph Hellwig bool *done, 6020333f950cSBrian Foster xfs_fileoff_t stop_fsb) 6021ecfea3f0SChristoph Hellwig { 6022ecfea3f0SChristoph Hellwig int whichfork = XFS_DATA_FORK; 6023ecfea3f0SChristoph Hellwig struct xfs_mount *mp = ip->i_mount; 6024ecfea3f0SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 6025ecfea3f0SChristoph Hellwig struct xfs_btree_cur *cur = NULL; 60265936dc54SChristoph Hellwig struct xfs_bmbt_irec got, next; 6027b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 6028bf806280SChristoph Hellwig xfs_fileoff_t new_startoff; 6029ecfea3f0SChristoph Hellwig int error = 0; 6030ecfea3f0SChristoph Hellwig int logflags = 0; 6031ecfea3f0SChristoph Hellwig 6032f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp)) || 6033a71895c5SDarrick J. Wong XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BMAPIFORMAT)) { 6034ecfea3f0SChristoph Hellwig return -EFSCORRUPTED; 6035ecfea3f0SChristoph Hellwig } 6036ecfea3f0SChristoph Hellwig 6037ecfea3f0SChristoph Hellwig if (XFS_FORCED_SHUTDOWN(mp)) 6038ecfea3f0SChristoph Hellwig return -EIO; 6039ecfea3f0SChristoph Hellwig 6040ecfea3f0SChristoph Hellwig ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL)); 6041ecfea3f0SChristoph Hellwig 6042ecfea3f0SChristoph Hellwig if (!(ifp->if_flags & XFS_IFEXTENTS)) { 6043ecfea3f0SChristoph Hellwig error = xfs_iread_extents(tp, ip, whichfork); 6044ecfea3f0SChristoph Hellwig if (error) 6045ecfea3f0SChristoph Hellwig return error; 6046ecfea3f0SChristoph Hellwig } 6047ecfea3f0SChristoph Hellwig 6048ecfea3f0SChristoph Hellwig if (ifp->if_flags & XFS_IFBROOT) { 6049ecfea3f0SChristoph Hellwig cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 605092219c29SDave Chinner cur->bc_ino.flags = 0; 6051ecfea3f0SChristoph Hellwig } 6052ecfea3f0SChristoph Hellwig 6053a904b1caSNamjae Jeon if (*next_fsb == NULLFSBLOCK) { 6054b2b1712aSChristoph Hellwig xfs_iext_last(ifp, &icur); 6055b2b1712aSChristoph Hellwig if (!xfs_iext_get_extent(ifp, &icur, &got) || 60565936dc54SChristoph Hellwig stop_fsb > got.br_startoff) { 6057ecfea3f0SChristoph Hellwig *done = true; 6058a904b1caSNamjae Jeon goto del_cursor; 6059a904b1caSNamjae Jeon } 606005b7c8abSChristoph Hellwig } else { 6061b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, *next_fsb, &icur, &got)) { 6062ecfea3f0SChristoph Hellwig *done = true; 6063a904b1caSNamjae Jeon goto del_cursor; 6064a904b1caSNamjae Jeon } 606505b7c8abSChristoph Hellwig } 6066f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, isnullstartblock(got.br_startblock))) { 6067f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 6068f9e03706SDarrick J. Wong goto del_cursor; 6069f9e03706SDarrick J. Wong } 6070a904b1caSNamjae Jeon 6071d0c22041SBrian Foster if (XFS_IS_CORRUPT(mp, stop_fsb > got.br_startoff)) { 6072c2414ad6SDarrick J. Wong error = -EFSCORRUPTED; 6073a904b1caSNamjae Jeon goto del_cursor; 6074a904b1caSNamjae Jeon } 6075a904b1caSNamjae Jeon 6076bf806280SChristoph Hellwig new_startoff = got.br_startoff + offset_shift_fsb; 6077b2b1712aSChristoph Hellwig if (xfs_iext_peek_next_extent(ifp, &icur, &next)) { 6078bf806280SChristoph Hellwig if (new_startoff + got.br_blockcount > next.br_startoff) { 6079bf806280SChristoph Hellwig error = -EINVAL; 6080bf806280SChristoph Hellwig goto del_cursor; 6081bf806280SChristoph Hellwig } 6082bf806280SChristoph Hellwig 6083bf806280SChristoph Hellwig /* 6084bf806280SChristoph Hellwig * Unlike a left shift (which involves a hole punch), a right 6085bf806280SChristoph Hellwig * shift does not modify extent neighbors in any way. We should 6086bf806280SChristoph Hellwig * never find mergeable extents in this scenario. Check anyways 6087bf806280SChristoph Hellwig * and warn if we encounter two extents that could be one. 6088bf806280SChristoph Hellwig */ 6089bf806280SChristoph Hellwig if (xfs_bmse_can_merge(&got, &next, offset_shift_fsb)) 6090bf806280SChristoph Hellwig WARN_ON_ONCE(1); 6091bf806280SChristoph Hellwig } 6092bf806280SChristoph Hellwig 60930f37d178SBrian Foster error = xfs_bmap_shift_update_extent(tp, ip, whichfork, &icur, &got, 60940f37d178SBrian Foster cur, &logflags, new_startoff); 6095ddb19e31SBrian Foster if (error) 6096ddb19e31SBrian Foster goto del_cursor; 60975936dc54SChristoph Hellwig 6098b2b1712aSChristoph Hellwig if (!xfs_iext_prev_extent(ifp, &icur, &got) || 60995936dc54SChristoph Hellwig stop_fsb >= got.br_startoff + got.br_blockcount) { 6100ecfea3f0SChristoph Hellwig *done = true; 61016b18af0dSChristoph Hellwig goto del_cursor; 6102a904b1caSNamjae Jeon } 610330f712c9SDave Chinner 61042c845f5aSBrian Foster *next_fsb = got.br_startoff; 610530f712c9SDave Chinner del_cursor: 610630f712c9SDave Chinner if (cur) 61070b04b6b8SDarrick J. Wong xfs_btree_del_cursor(cur, error); 6108ca446d88SBrian Foster if (logflags) 610930f712c9SDave Chinner xfs_trans_log_inode(tp, ip, logflags); 611030f712c9SDave Chinner return error; 611130f712c9SDave Chinner } 6112a904b1caSNamjae Jeon 6113a904b1caSNamjae Jeon /* 6114b2b1712aSChristoph Hellwig * Splits an extent into two extents at split_fsb block such that it is the 6115b2b1712aSChristoph Hellwig * first block of the current_ext. @ext is a target extent to be split. 6116b2b1712aSChristoph Hellwig * @split_fsb is a block where the extents is split. If split_fsb lies in a 6117b2b1712aSChristoph Hellwig * hole or the first block of extents, just return 0. 6118a904b1caSNamjae Jeon */ 6119b73df17eSBrian Foster int 6120b73df17eSBrian Foster xfs_bmap_split_extent( 6121a904b1caSNamjae Jeon struct xfs_trans *tp, 6122a904b1caSNamjae Jeon struct xfs_inode *ip, 61234b77a088SBrian Foster xfs_fileoff_t split_fsb) 6124a904b1caSNamjae Jeon { 6125a904b1caSNamjae Jeon int whichfork = XFS_DATA_FORK; 6126f7e67b20SChristoph Hellwig struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); 6127a904b1caSNamjae Jeon struct xfs_btree_cur *cur = NULL; 6128a904b1caSNamjae Jeon struct xfs_bmbt_irec got; 6129a904b1caSNamjae Jeon struct xfs_bmbt_irec new; /* split extent */ 6130a904b1caSNamjae Jeon struct xfs_mount *mp = ip->i_mount; 6131a904b1caSNamjae Jeon xfs_fsblock_t gotblkcnt; /* new block count for got */ 6132b2b1712aSChristoph Hellwig struct xfs_iext_cursor icur; 6133a904b1caSNamjae Jeon int error = 0; 6134a904b1caSNamjae Jeon int logflags = 0; 6135a904b1caSNamjae Jeon int i = 0; 6136a904b1caSNamjae Jeon 6137f7e67b20SChristoph Hellwig if (XFS_IS_CORRUPT(mp, !xfs_ifork_has_extents(ifp)) || 6138a71895c5SDarrick J. Wong XFS_TEST_ERROR(false, mp, XFS_ERRTAG_BMAPIFORMAT)) { 6139a904b1caSNamjae Jeon return -EFSCORRUPTED; 6140a904b1caSNamjae Jeon } 6141a904b1caSNamjae Jeon 6142a904b1caSNamjae Jeon if (XFS_FORCED_SHUTDOWN(mp)) 6143a904b1caSNamjae Jeon return -EIO; 6144a904b1caSNamjae Jeon 6145a904b1caSNamjae Jeon if (!(ifp->if_flags & XFS_IFEXTENTS)) { 6146a904b1caSNamjae Jeon /* Read in all the extents */ 6147a904b1caSNamjae Jeon error = xfs_iread_extents(tp, ip, whichfork); 6148a904b1caSNamjae Jeon if (error) 6149a904b1caSNamjae Jeon return error; 6150a904b1caSNamjae Jeon } 6151a904b1caSNamjae Jeon 6152a904b1caSNamjae Jeon /* 61534c35445bSChristoph Hellwig * If there are not extents, or split_fsb lies in a hole we are done. 6154a904b1caSNamjae Jeon */ 6155b2b1712aSChristoph Hellwig if (!xfs_iext_lookup_extent(ip, ifp, split_fsb, &icur, &got) || 61564c35445bSChristoph Hellwig got.br_startoff >= split_fsb) 6157a904b1caSNamjae Jeon return 0; 6158a904b1caSNamjae Jeon 6159a904b1caSNamjae Jeon gotblkcnt = split_fsb - got.br_startoff; 6160a904b1caSNamjae Jeon new.br_startoff = split_fsb; 6161a904b1caSNamjae Jeon new.br_startblock = got.br_startblock + gotblkcnt; 6162a904b1caSNamjae Jeon new.br_blockcount = got.br_blockcount - gotblkcnt; 6163a904b1caSNamjae Jeon new.br_state = got.br_state; 6164a904b1caSNamjae Jeon 6165a904b1caSNamjae Jeon if (ifp->if_flags & XFS_IFBROOT) { 6166a904b1caSNamjae Jeon cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); 616792219c29SDave Chinner cur->bc_ino.flags = 0; 6168e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &got, &i); 6169a904b1caSNamjae Jeon if (error) 6170a904b1caSNamjae Jeon goto del_cursor; 6171f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 6172f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 6173f9e03706SDarrick J. Wong goto del_cursor; 6174f9e03706SDarrick J. Wong } 6175a904b1caSNamjae Jeon } 6176a904b1caSNamjae Jeon 6177a904b1caSNamjae Jeon got.br_blockcount = gotblkcnt; 6178b2b1712aSChristoph Hellwig xfs_iext_update_extent(ip, xfs_bmap_fork_to_state(whichfork), &icur, 6179b2b1712aSChristoph Hellwig &got); 6180a904b1caSNamjae Jeon 6181a904b1caSNamjae Jeon logflags = XFS_ILOG_CORE; 6182a904b1caSNamjae Jeon if (cur) { 6183a67d00a5SChristoph Hellwig error = xfs_bmbt_update(cur, &got); 6184a904b1caSNamjae Jeon if (error) 6185a904b1caSNamjae Jeon goto del_cursor; 6186a904b1caSNamjae Jeon } else 6187a904b1caSNamjae Jeon logflags |= XFS_ILOG_DEXT; 6188a904b1caSNamjae Jeon 6189a904b1caSNamjae Jeon /* Add new extent */ 6190b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &icur); 61910254c2f2SChristoph Hellwig xfs_iext_insert(ip, &icur, &new, 0); 6192daf83964SChristoph Hellwig ifp->if_nextents++; 6193a904b1caSNamjae Jeon 6194a904b1caSNamjae Jeon if (cur) { 6195e16cf9b0SChristoph Hellwig error = xfs_bmbt_lookup_eq(cur, &new, &i); 6196a904b1caSNamjae Jeon if (error) 6197a904b1caSNamjae Jeon goto del_cursor; 6198f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 0)) { 6199f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 6200f9e03706SDarrick J. Wong goto del_cursor; 6201f9e03706SDarrick J. Wong } 6202a904b1caSNamjae Jeon error = xfs_btree_insert(cur, &i); 6203a904b1caSNamjae Jeon if (error) 6204a904b1caSNamjae Jeon goto del_cursor; 6205f9e03706SDarrick J. Wong if (XFS_IS_CORRUPT(mp, i != 1)) { 6206f9e03706SDarrick J. Wong error = -EFSCORRUPTED; 6207f9e03706SDarrick J. Wong goto del_cursor; 6208f9e03706SDarrick J. Wong } 6209a904b1caSNamjae Jeon } 6210a904b1caSNamjae Jeon 6211a904b1caSNamjae Jeon /* 6212a904b1caSNamjae Jeon * Convert to a btree if necessary. 6213a904b1caSNamjae Jeon */ 6214a904b1caSNamjae Jeon if (xfs_bmap_needs_btree(ip, whichfork)) { 6215a904b1caSNamjae Jeon int tmp_logflags; /* partial log flag return val */ 6216a904b1caSNamjae Jeon 6217a904b1caSNamjae Jeon ASSERT(cur == NULL); 6218280253d2SBrian Foster error = xfs_bmap_extents_to_btree(tp, ip, &cur, 0, 6219280253d2SBrian Foster &tmp_logflags, whichfork); 6220a904b1caSNamjae Jeon logflags |= tmp_logflags; 6221a904b1caSNamjae Jeon } 6222a904b1caSNamjae Jeon 6223a904b1caSNamjae Jeon del_cursor: 6224a904b1caSNamjae Jeon if (cur) { 622592219c29SDave Chinner cur->bc_ino.allocated = 0; 62260b04b6b8SDarrick J. Wong xfs_btree_del_cursor(cur, error); 6227a904b1caSNamjae Jeon } 6228a904b1caSNamjae Jeon 6229a904b1caSNamjae Jeon if (logflags) 6230a904b1caSNamjae Jeon xfs_trans_log_inode(tp, ip, logflags); 6231a904b1caSNamjae Jeon return error; 6232a904b1caSNamjae Jeon } 6233a904b1caSNamjae Jeon 62349f3afb57SDarrick J. Wong /* Deferred mapping is only for real extents in the data fork. */ 62359f3afb57SDarrick J. Wong static bool 62369f3afb57SDarrick J. Wong xfs_bmap_is_update_needed( 62379f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 62389f3afb57SDarrick J. Wong { 62399f3afb57SDarrick J. Wong return bmap->br_startblock != HOLESTARTBLOCK && 62409f3afb57SDarrick J. Wong bmap->br_startblock != DELAYSTARTBLOCK; 62419f3afb57SDarrick J. Wong } 62429f3afb57SDarrick J. Wong 62439f3afb57SDarrick J. Wong /* Record a bmap intent. */ 62449f3afb57SDarrick J. Wong static int 62459f3afb57SDarrick J. Wong __xfs_bmap_add( 62460f37d178SBrian Foster struct xfs_trans *tp, 62479f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 62489f3afb57SDarrick J. Wong struct xfs_inode *ip, 62499f3afb57SDarrick J. Wong int whichfork, 62509f3afb57SDarrick J. Wong struct xfs_bmbt_irec *bmap) 62519f3afb57SDarrick J. Wong { 62529f3afb57SDarrick J. Wong struct xfs_bmap_intent *bi; 62539f3afb57SDarrick J. Wong 62540f37d178SBrian Foster trace_xfs_bmap_defer(tp->t_mountp, 62550f37d178SBrian Foster XFS_FSB_TO_AGNO(tp->t_mountp, bmap->br_startblock), 62569f3afb57SDarrick J. Wong type, 62570f37d178SBrian Foster XFS_FSB_TO_AGBNO(tp->t_mountp, bmap->br_startblock), 62589f3afb57SDarrick J. Wong ip->i_ino, whichfork, 62599f3afb57SDarrick J. Wong bmap->br_startoff, 62609f3afb57SDarrick J. Wong bmap->br_blockcount, 62619f3afb57SDarrick J. Wong bmap->br_state); 62629f3afb57SDarrick J. Wong 6263707e0ddaSTetsuo Handa bi = kmem_alloc(sizeof(struct xfs_bmap_intent), KM_NOFS); 62649f3afb57SDarrick J. Wong INIT_LIST_HEAD(&bi->bi_list); 62659f3afb57SDarrick J. Wong bi->bi_type = type; 62669f3afb57SDarrick J. Wong bi->bi_owner = ip; 62679f3afb57SDarrick J. Wong bi->bi_whichfork = whichfork; 62689f3afb57SDarrick J. Wong bi->bi_bmap = *bmap; 62699f3afb57SDarrick J. Wong 62700f37d178SBrian Foster xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_BMAP, &bi->bi_list); 62719f3afb57SDarrick J. Wong return 0; 62729f3afb57SDarrick J. Wong } 62739f3afb57SDarrick J. Wong 62749f3afb57SDarrick J. Wong /* Map an extent into a file. */ 62753e08f42aSDarrick J. Wong void 62769f3afb57SDarrick J. Wong xfs_bmap_map_extent( 62770f37d178SBrian Foster struct xfs_trans *tp, 62789f3afb57SDarrick J. Wong struct xfs_inode *ip, 62799f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 62809f3afb57SDarrick J. Wong { 62819f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 62823e08f42aSDarrick J. Wong return; 62839f3afb57SDarrick J. Wong 62843e08f42aSDarrick J. Wong __xfs_bmap_add(tp, XFS_BMAP_MAP, ip, XFS_DATA_FORK, PREV); 62859f3afb57SDarrick J. Wong } 62869f3afb57SDarrick J. Wong 62879f3afb57SDarrick J. Wong /* Unmap an extent out of a file. */ 62883e08f42aSDarrick J. Wong void 62899f3afb57SDarrick J. Wong xfs_bmap_unmap_extent( 62900f37d178SBrian Foster struct xfs_trans *tp, 62919f3afb57SDarrick J. Wong struct xfs_inode *ip, 62929f3afb57SDarrick J. Wong struct xfs_bmbt_irec *PREV) 62939f3afb57SDarrick J. Wong { 62949f3afb57SDarrick J. Wong if (!xfs_bmap_is_update_needed(PREV)) 62953e08f42aSDarrick J. Wong return; 62969f3afb57SDarrick J. Wong 62973e08f42aSDarrick J. Wong __xfs_bmap_add(tp, XFS_BMAP_UNMAP, ip, XFS_DATA_FORK, PREV); 62989f3afb57SDarrick J. Wong } 62999f3afb57SDarrick J. Wong 63009f3afb57SDarrick J. Wong /* 63019f3afb57SDarrick J. Wong * Process one of the deferred bmap operations. We pass back the 63029f3afb57SDarrick J. Wong * btree cursor to maintain our lock on the bmapbt between calls. 63039f3afb57SDarrick J. Wong */ 63049f3afb57SDarrick J. Wong int 63059f3afb57SDarrick J. Wong xfs_bmap_finish_one( 63069f3afb57SDarrick J. Wong struct xfs_trans *tp, 63079f3afb57SDarrick J. Wong struct xfs_inode *ip, 63089f3afb57SDarrick J. Wong enum xfs_bmap_intent_type type, 63099f3afb57SDarrick J. Wong int whichfork, 63109f3afb57SDarrick J. Wong xfs_fileoff_t startoff, 63119f3afb57SDarrick J. Wong xfs_fsblock_t startblock, 6312e1a4e37cSDarrick J. Wong xfs_filblks_t *blockcount, 63139f3afb57SDarrick J. Wong xfs_exntst_t state) 63149f3afb57SDarrick J. Wong { 6315e1a4e37cSDarrick J. Wong int error = 0; 63169f3afb57SDarrick J. Wong 631737283797SBrian Foster ASSERT(tp->t_firstblock == NULLFSBLOCK); 63184c1a67bdSDarrick J. Wong 63199f3afb57SDarrick J. Wong trace_xfs_bmap_deferred(tp->t_mountp, 63209f3afb57SDarrick J. Wong XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type, 63219f3afb57SDarrick J. Wong XFS_FSB_TO_AGBNO(tp->t_mountp, startblock), 6322e1a4e37cSDarrick J. Wong ip->i_ino, whichfork, startoff, *blockcount, state); 63239f3afb57SDarrick J. Wong 632439e07daaSChristoph Hellwig if (WARN_ON_ONCE(whichfork != XFS_DATA_FORK)) 63259f3afb57SDarrick J. Wong return -EFSCORRUPTED; 63269f3afb57SDarrick J. Wong 63279f3afb57SDarrick J. Wong if (XFS_TEST_ERROR(false, tp->t_mountp, 63289e24cfd0SDarrick J. Wong XFS_ERRTAG_BMAP_FINISH_ONE)) 63299f3afb57SDarrick J. Wong return -EIO; 63309f3afb57SDarrick J. Wong 63319f3afb57SDarrick J. Wong switch (type) { 63329f3afb57SDarrick J. Wong case XFS_BMAP_MAP: 6333e1a4e37cSDarrick J. Wong error = xfs_bmapi_remap(tp, ip, startoff, *blockcount, 6334ff3edf25SBrian Foster startblock, 0); 6335e1a4e37cSDarrick J. Wong *blockcount = 0; 63369f3afb57SDarrick J. Wong break; 63379f3afb57SDarrick J. Wong case XFS_BMAP_UNMAP: 6338e1a4e37cSDarrick J. Wong error = __xfs_bunmapi(tp, ip, startoff, blockcount, 63392af52842SBrian Foster XFS_BMAPI_REMAP, 1); 63409f3afb57SDarrick J. Wong break; 63419f3afb57SDarrick J. Wong default: 63429f3afb57SDarrick J. Wong ASSERT(0); 63439f3afb57SDarrick J. Wong error = -EFSCORRUPTED; 63449f3afb57SDarrick J. Wong } 63459f3afb57SDarrick J. Wong 63469f3afb57SDarrick J. Wong return error; 63479f3afb57SDarrick J. Wong } 634830b0984dSDarrick J. Wong 634930b0984dSDarrick J. Wong /* Check that an inode's extent does not have invalid flags or bad ranges. */ 635030b0984dSDarrick J. Wong xfs_failaddr_t 635130b0984dSDarrick J. Wong xfs_bmap_validate_extent( 635230b0984dSDarrick J. Wong struct xfs_inode *ip, 635330b0984dSDarrick J. Wong int whichfork, 635430b0984dSDarrick J. Wong struct xfs_bmbt_irec *irec) 635530b0984dSDarrick J. Wong { 635630b0984dSDarrick J. Wong struct xfs_mount *mp = ip->i_mount; 635730b0984dSDarrick J. Wong 635833005fd0SDarrick J. Wong if (!xfs_verify_fileext(mp, irec->br_startoff, irec->br_blockcount)) 6359acf104c2SDarrick J. Wong return __this_address; 6360acf104c2SDarrick J. Wong 636118695ad4SDarrick J. Wong if (XFS_IS_REALTIME_INODE(ip) && whichfork == XFS_DATA_FORK) { 636218695ad4SDarrick J. Wong if (!xfs_verify_rtext(mp, irec->br_startblock, 636318695ad4SDarrick J. Wong irec->br_blockcount)) 636430b0984dSDarrick J. Wong return __this_address; 636530b0984dSDarrick J. Wong } else { 636667457eb0SDarrick J. Wong if (!xfs_verify_fsbext(mp, irec->br_startblock, 636767457eb0SDarrick J. Wong irec->br_blockcount)) 636830b0984dSDarrick J. Wong return __this_address; 636930b0984dSDarrick J. Wong } 6370daa79baeSChristoph Hellwig if (irec->br_state != XFS_EXT_NORM && whichfork != XFS_DATA_FORK) 637130b0984dSDarrick J. Wong return __this_address; 637230b0984dSDarrick J. Wong return NULL; 637330b0984dSDarrick J. Wong } 6374