| /* |
| * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_types.h" |
| #include "xfs_bit.h" |
| #include "xfs_log.h" |
| #include "xfs_inum.h" |
| #include "xfs_trans.h" |
| #include "xfs_sb.h" |
| #include "xfs_ag.h" |
| #include "xfs_dir2.h" |
| #include "xfs_da_btree.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_alloc_btree.h" |
| #include "xfs_ialloc_btree.h" |
| #include "xfs_dir2_sf.h" |
| #include "xfs_attr_sf.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_btree.h" |
| #include "xfs_dmapi.h" |
| #include "xfs_mount.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_itable.h" |
| #include "xfs_dir2_data.h" |
| #include "xfs_dir2_leaf.h" |
| #include "xfs_dir2_block.h" |
| #include "xfs_inode_item.h" |
| #include "xfs_extfree_item.h" |
| #include "xfs_alloc.h" |
| #include "xfs_bmap.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_error.h" |
| #include "xfs_attr_leaf.h" |
| #include "xfs_rw.h" |
| #include "xfs_quota.h" |
| #include "xfs_trans_space.h" |
| #include "xfs_buf_item.h" |
| |
| |
| #ifdef DEBUG |
| STATIC void |
| xfs_bmap_check_leaf_extents(xfs_btree_cur_t *cur, xfs_inode_t *ip, int whichfork); |
| #endif |
| |
| kmem_zone_t *xfs_bmap_free_item_zone; |
| |
| /* |
| * Prototypes for internal bmap routines. |
| */ |
| |
| |
| /* |
| * Called from xfs_bmap_add_attrfork to handle extents format files. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_attrfork_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated */ |
| xfs_bmap_free_t *flist, /* blocks to free at commit */ |
| int *flags); /* inode logging flags */ |
| |
| /* |
| * Called from xfs_bmap_add_attrfork to handle local format files. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_attrfork_local( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated */ |
| xfs_bmap_free_t *flist, /* blocks to free at commit */ |
| int *flags); /* inode logging flags */ |
| |
| /* |
| * Called by xfs_bmapi to update file extent records and the btree |
| * after allocating space (or doing a delayed allocation). |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| xfs_fsblock_t *first, /* pointer to firstblock variable */ |
| xfs_bmap_free_t *flist, /* list of extents to be freed */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int whichfork, /* data or attr fork */ |
| int rsvd); /* OK to allocate reserved blocks */ |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting a delayed |
| * allocation to a real allocation. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_delay_real( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */ |
| xfs_fsblock_t *first, /* pointer to firstblock variable */ |
| xfs_bmap_free_t *flist, /* list of extents to be freed */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int rsvd); /* OK to allocate reserved blocks */ |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting a hole |
| * to a delayed allocation. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_hole_delay( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t *cur, /* if null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp,/* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int rsvd); /* OK to allocate reserved blocks */ |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting a hole |
| * to a real allocation. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_hole_real( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t *cur, /* if null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting an unwritten |
| * allocation to a real allocation or vice versa. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_unwritten_real( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta); /* Change made to incore extents */ |
| |
| /* |
| * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. |
| * It figures out where to ask the underlying allocator to put the new extent. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_alloc( |
| xfs_bmalloca_t *ap); /* bmap alloc argument struct */ |
| |
| /* |
| * Transform a btree format file with only one leaf node, where the |
| * extents list will fit in the inode, into an extents format file. |
| * Since the file extents are already in-core, all we have to do is |
| * give up the space for the btree root and pitch the leaf block. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_btree_to_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_btree_cur_t *cur, /* btree cursor */ |
| int *logflagsp, /* inode logging flags */ |
| int whichfork); /* data or attr fork */ |
| |
| #ifdef DEBUG |
| /* |
| * Check that the extents list for the inode ip is in the right order. |
| */ |
| STATIC void |
| xfs_bmap_check_extents( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| int whichfork); /* data or attr fork */ |
| #endif |
| |
| /* |
| * Called by xfs_bmapi to update file extent records and the btree |
| * after removing space (or undoing a delayed allocation). |
| */ |
| STATIC int /* error */ |
| xfs_bmap_del_extent( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_trans_t *tp, /* current trans pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_bmap_free_t *flist, /* list of extents to be freed */ |
| xfs_btree_cur_t *cur, /* if null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp,/* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int whichfork, /* data or attr fork */ |
| int rsvd); /* OK to allocate reserved blocks */ |
| |
| /* |
| * Remove the entry "free" from the free item list. Prev points to the |
| * previous entry, unless "free" is the head of the list. |
| */ |
| STATIC void |
| xfs_bmap_del_free( |
| xfs_bmap_free_t *flist, /* free item list header */ |
| xfs_bmap_free_item_t *prev, /* previous item on list, if any */ |
| xfs_bmap_free_item_t *free); /* list item to be freed */ |
| |
| /* |
| * Convert an extents-format file into a btree-format file. |
| * The new file will have a root block (in the inode) and a single child block. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_extents_to_btree( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first-block-allocated */ |
| xfs_bmap_free_t *flist, /* blocks freed in xaction */ |
| xfs_btree_cur_t **curp, /* cursor returned to caller */ |
| int wasdel, /* converting a delayed alloc */ |
| int *logflagsp, /* inode logging flags */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Convert a local file to an extents file. |
| * This code is sort of bogus, since the file data needs to get |
| * logged so it won't be lost. The bmap-level manipulations are ok, though. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_local_to_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated in xaction */ |
| xfs_extlen_t total, /* total blocks needed by transaction */ |
| int *logflagsp, /* inode logging flags */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Search the extents list for the inode, for the extent containing bno. |
| * If bno lies in a hole, point to the next entry. If bno lies past eof, |
| * *eofp will be set, and *prevp will contain the last entry (null if none). |
| * Else, *lastxp will be set to the index of the found |
| * entry; *gotp will contain the entry. |
| */ |
| STATIC xfs_bmbt_rec_t * /* pointer to found extent entry */ |
| xfs_bmap_search_extents( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fileoff_t bno, /* block number searched for */ |
| int whichfork, /* data or attr fork */ |
| int *eofp, /* out: end of file found */ |
| xfs_extnum_t *lastxp, /* out: last extent index */ |
| xfs_bmbt_irec_t *gotp, /* out: extent entry found */ |
| xfs_bmbt_irec_t *prevp); /* out: previous extent entry found */ |
| |
| /* |
| * Check the last inode extent to determine whether this allocation will result |
| * in blocks being allocated at the end of the file. When we allocate new data |
| * blocks at the end of the file which do not start at the previous data block, |
| * we will try to align the new blocks at stripe unit boundaries. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_isaeof( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fileoff_t off, /* file offset in fsblocks */ |
| int whichfork, /* data or attribute fork */ |
| char *aeof); /* return value */ |
| |
| #ifdef XFS_BMAP_TRACE |
| /* |
| * Add a bmap trace buffer entry. Base routine for the others. |
| */ |
| STATIC void |
| xfs_bmap_trace_addentry( |
| int opcode, /* operation */ |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry(ies) */ |
| xfs_extnum_t cnt, /* count of entries, 1 or 2 */ |
| xfs_bmbt_rec_t *r1, /* first record */ |
| xfs_bmbt_rec_t *r2, /* second record or null */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Add bmap trace entry prior to a call to xfs_iext_remove. |
| */ |
| STATIC void |
| xfs_bmap_trace_delete( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry(entries) deleted */ |
| xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Add bmap trace entry prior to a call to xfs_iext_insert, or |
| * reading in the extents list from the disk (in the btree). |
| */ |
| STATIC void |
| xfs_bmap_trace_insert( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry(entries) inserted */ |
| xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */ |
| xfs_bmbt_irec_t *r1, /* inserted record 1 */ |
| xfs_bmbt_irec_t *r2, /* inserted record 2 or null */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Add bmap trace entry after updating an extent record in place. |
| */ |
| STATIC void |
| xfs_bmap_trace_post_update( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry updated */ |
| int whichfork); /* data or attr fork */ |
| |
| /* |
| * Add bmap trace entry prior to updating an extent record in place. |
| */ |
| STATIC void |
| xfs_bmap_trace_pre_update( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry to be updated */ |
| int whichfork); /* data or attr fork */ |
| |
| #else |
| #define xfs_bmap_trace_delete(f,d,ip,i,c,w) |
| #define xfs_bmap_trace_insert(f,d,ip,i,c,r1,r2,w) |
| #define xfs_bmap_trace_post_update(f,d,ip,i,w) |
| #define xfs_bmap_trace_pre_update(f,d,ip,i,w) |
| #endif /* XFS_BMAP_TRACE */ |
| |
| /* |
| * Compute the worst-case number of indirect blocks that will be used |
| * for ip's delayed extent of length "len". |
| */ |
| STATIC xfs_filblks_t |
| xfs_bmap_worst_indlen( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_filblks_t len); /* delayed extent length */ |
| |
| #ifdef DEBUG |
| /* |
| * Perform various validation checks on the values being returned |
| * from xfs_bmapi(). |
| */ |
| STATIC void |
| xfs_bmap_validate_ret( |
| xfs_fileoff_t bno, |
| xfs_filblks_t len, |
| int flags, |
| xfs_bmbt_irec_t *mval, |
| int nmap, |
| int ret_nmap); |
| #else |
| #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) |
| #endif /* DEBUG */ |
| |
| #if defined(XFS_RW_TRACE) |
| STATIC void |
| xfs_bunmap_trace( |
| xfs_inode_t *ip, |
| xfs_fileoff_t bno, |
| xfs_filblks_t len, |
| int flags, |
| inst_t *ra); |
| #else |
| #define xfs_bunmap_trace(ip, bno, len, flags, ra) |
| #endif /* XFS_RW_TRACE */ |
| |
| STATIC int |
| xfs_bmap_count_tree( |
| xfs_mount_t *mp, |
| xfs_trans_t *tp, |
| xfs_ifork_t *ifp, |
| xfs_fsblock_t blockno, |
| int levelin, |
| int *count); |
| |
| STATIC int |
| xfs_bmap_count_leaves( |
| xfs_ifork_t *ifp, |
| xfs_extnum_t idx, |
| int numrecs, |
| int *count); |
| |
| STATIC int |
| xfs_bmap_disk_count_leaves( |
| xfs_ifork_t *ifp, |
| xfs_mount_t *mp, |
| xfs_extnum_t idx, |
| xfs_bmbt_block_t *block, |
| int numrecs, |
| int *count); |
| |
| /* |
| * Bmap internal routines. |
| */ |
| |
| /* |
| * Called from xfs_bmap_add_attrfork to handle btree format files. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_attrfork_btree( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated */ |
| xfs_bmap_free_t *flist, /* blocks to free at commit */ |
| int *flags) /* inode logging flags */ |
| { |
| xfs_btree_cur_t *cur; /* btree cursor */ |
| int error; /* error return value */ |
| xfs_mount_t *mp; /* file system mount struct */ |
| int stat; /* newroot status */ |
| |
| mp = ip->i_mount; |
| if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) |
| *flags |= XFS_ILOG_DBROOT; |
| else { |
| cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip, |
| XFS_DATA_FORK); |
| cur->bc_private.b.flist = flist; |
| cur->bc_private.b.firstblock = *firstblock; |
| if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) |
| goto error0; |
| ASSERT(stat == 1); /* must be at least one entry */ |
| if ((error = xfs_bmbt_newroot(cur, flags, &stat))) |
| goto error0; |
| if (stat == 0) { |
| xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
| return XFS_ERROR(ENOSPC); |
| } |
| *firstblock = cur->bc_private.b.firstblock; |
| cur->bc_private.b.allocated = 0; |
| xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
| } |
| return 0; |
| error0: |
| xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); |
| return error; |
| } |
| |
| /* |
| * Called from xfs_bmap_add_attrfork to handle extents format files. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_attrfork_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated */ |
| xfs_bmap_free_t *flist, /* blocks to free at commit */ |
| int *flags) /* inode logging flags */ |
| { |
| xfs_btree_cur_t *cur; /* bmap btree cursor */ |
| int error; /* error return value */ |
| |
| if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) |
| return 0; |
| cur = NULL; |
| error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0, |
| flags, XFS_DATA_FORK); |
| if (cur) { |
| cur->bc_private.b.allocated = 0; |
| xfs_btree_del_cursor(cur, |
| error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
| } |
| return error; |
| } |
| |
| /* |
| * Called from xfs_bmap_add_attrfork to handle local format files. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_attrfork_local( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated */ |
| xfs_bmap_free_t *flist, /* blocks to free at commit */ |
| int *flags) /* inode logging flags */ |
| { |
| xfs_da_args_t dargs; /* args for dir/attr code */ |
| int error; /* error return value */ |
| xfs_mount_t *mp; /* mount structure pointer */ |
| |
| if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) |
| return 0; |
| if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
| mp = ip->i_mount; |
| memset(&dargs, 0, sizeof(dargs)); |
| dargs.dp = ip; |
| dargs.firstblock = firstblock; |
| dargs.flist = flist; |
| dargs.total = mp->m_dirblkfsbs; |
| dargs.whichfork = XFS_DATA_FORK; |
| dargs.trans = tp; |
| error = xfs_dir2_sf_to_block(&dargs); |
| } else |
| error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags, |
| XFS_DATA_FORK); |
| return error; |
| } |
| |
| /* |
| * Called by xfs_bmapi to update file extent records and the btree |
| * after allocating space (or doing a delayed allocation). |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| xfs_fsblock_t *first, /* pointer to firstblock variable */ |
| xfs_bmap_free_t *flist, /* list of extents to be freed */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int whichfork, /* data or attr fork */ |
| int rsvd) /* OK to use reserved data blocks */ |
| { |
| xfs_btree_cur_t *cur; /* btree cursor or null */ |
| xfs_filblks_t da_new; /* new count del alloc blocks used */ |
| xfs_filblks_t da_old; /* old count del alloc blocks used */ |
| int error; /* error return value */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_add_extent"; |
| #endif |
| xfs_ifork_t *ifp; /* inode fork ptr */ |
| int logflags; /* returned value */ |
| xfs_extnum_t nextents; /* number of extents in file now */ |
| |
| XFS_STATS_INC(xs_add_exlist); |
| cur = *curp; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| ASSERT(idx <= nextents); |
| da_old = da_new = 0; |
| error = 0; |
| /* |
| * This is the first extent added to a new/empty file. |
| * Special case this one, so other routines get to assume there are |
| * already extents in the list. |
| */ |
| if (nextents == 0) { |
| xfs_bmap_trace_insert(fname, "insert empty", ip, 0, 1, new, |
| NULL, whichfork); |
| xfs_iext_insert(ifp, 0, 1, new); |
| ASSERT(cur == NULL); |
| ifp->if_lastex = 0; |
| if (!ISNULLSTARTBLOCK(new->br_startblock)) { |
| XFS_IFORK_NEXT_SET(ip, whichfork, 1); |
| logflags = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork); |
| } else |
| logflags = 0; |
| /* DELTA: single new extent */ |
| if (delta) { |
| if (delta->xed_startoff > new->br_startoff) |
| delta->xed_startoff = new->br_startoff; |
| if (delta->xed_blockcount < |
| new->br_startoff + new->br_blockcount) |
| delta->xed_blockcount = new->br_startoff + |
| new->br_blockcount; |
| } |
| } |
| /* |
| * Any kind of new delayed allocation goes here. |
| */ |
| else if (ISNULLSTARTBLOCK(new->br_startblock)) { |
| if (cur) |
| ASSERT((cur->bc_private.b.flags & |
| XFS_BTCUR_BPRV_WASDEL) == 0); |
| if ((error = xfs_bmap_add_extent_hole_delay(ip, idx, cur, new, |
| &logflags, delta, rsvd))) |
| goto done; |
| } |
| /* |
| * Real allocation off the end of the file. |
| */ |
| else if (idx == nextents) { |
| if (cur) |
| ASSERT((cur->bc_private.b.flags & |
| XFS_BTCUR_BPRV_WASDEL) == 0); |
| if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, new, |
| &logflags, delta, whichfork))) |
| goto done; |
| } else { |
| xfs_bmbt_irec_t prev; /* old extent at offset idx */ |
| |
| /* |
| * Get the record referred to by idx. |
| */ |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &prev); |
| /* |
| * If it's a real allocation record, and the new allocation ends |
| * after the start of the referred to record, then we're filling |
| * in a delayed or unwritten allocation with a real one, or |
| * converting real back to unwritten. |
| */ |
| if (!ISNULLSTARTBLOCK(new->br_startblock) && |
| new->br_startoff + new->br_blockcount > prev.br_startoff) { |
| if (prev.br_state != XFS_EXT_UNWRITTEN && |
| ISNULLSTARTBLOCK(prev.br_startblock)) { |
| da_old = STARTBLOCKVAL(prev.br_startblock); |
| if (cur) |
| ASSERT(cur->bc_private.b.flags & |
| XFS_BTCUR_BPRV_WASDEL); |
| if ((error = xfs_bmap_add_extent_delay_real(ip, |
| idx, &cur, new, &da_new, first, flist, |
| &logflags, delta, rsvd))) |
| goto done; |
| } else if (new->br_state == XFS_EXT_NORM) { |
| ASSERT(new->br_state == XFS_EXT_NORM); |
| if ((error = xfs_bmap_add_extent_unwritten_real( |
| ip, idx, &cur, new, &logflags, delta))) |
| goto done; |
| } else { |
| ASSERT(new->br_state == XFS_EXT_UNWRITTEN); |
| if ((error = xfs_bmap_add_extent_unwritten_real( |
| ip, idx, &cur, new, &logflags, delta))) |
| goto done; |
| } |
| ASSERT(*curp == cur || *curp == NULL); |
| } |
| /* |
| * Otherwise we're filling in a hole with an allocation. |
| */ |
| else { |
| if (cur) |
| ASSERT((cur->bc_private.b.flags & |
| XFS_BTCUR_BPRV_WASDEL) == 0); |
| if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, |
| new, &logflags, delta, whichfork))) |
| goto done; |
| } |
| } |
| |
| ASSERT(*curp == cur || *curp == NULL); |
| /* |
| * Convert to a btree if necessary. |
| */ |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) { |
| int tmp_logflags; /* partial log flag return val */ |
| |
| ASSERT(cur == NULL); |
| error = xfs_bmap_extents_to_btree(ip->i_transp, ip, first, |
| flist, &cur, da_old > 0, &tmp_logflags, whichfork); |
| logflags |= tmp_logflags; |
| if (error) |
| goto done; |
| } |
| /* |
| * Adjust for changes in reserved delayed indirect blocks. |
| * Nothing to do for disk quotas here. |
| */ |
| if (da_old || da_new) { |
| xfs_filblks_t nblks; |
| |
| nblks = da_new; |
| if (cur) |
| nblks += cur->bc_private.b.allocated; |
| ASSERT(nblks <= da_old); |
| if (nblks < da_old) |
| xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS, |
| (int)(da_old - nblks), rsvd); |
| } |
| /* |
| * Clear out the allocated field, done with it now in any case. |
| */ |
| if (cur) { |
| cur->bc_private.b.allocated = 0; |
| *curp = cur; |
| } |
| done: |
| #ifdef DEBUG |
| if (!error) |
| xfs_bmap_check_leaf_extents(*curp, ip, whichfork); |
| #endif |
| *logflagsp = logflags; |
| return error; |
| } |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting a delayed |
| * allocation to a real allocation. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_delay_real( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */ |
| xfs_fsblock_t *first, /* pointer to firstblock variable */ |
| xfs_bmap_free_t *flist, /* list of extents to be freed */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int rsvd) /* OK to use reserved data block allocation */ |
| { |
| xfs_btree_cur_t *cur; /* btree cursor */ |
| int diff; /* temp value */ |
| xfs_bmbt_rec_t *ep; /* extent entry for idx */ |
| int error; /* error return value */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_add_extent_delay_real"; |
| #endif |
| int i; /* temp state */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_fileoff_t new_endoff; /* end offset of new entry */ |
| xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ |
| /* left is 0, right is 1, prev is 2 */ |
| int rval=0; /* return value (logging flags) */ |
| int state = 0;/* state bits, accessed thru macros */ |
| xfs_filblks_t temp=0; /* value for dnew calculations */ |
| xfs_filblks_t temp2=0;/* value for dnew calculations */ |
| int tmp_rval; /* partial logging flags */ |
| enum { /* bit number definitions for state */ |
| LEFT_CONTIG, RIGHT_CONTIG, |
| LEFT_FILLING, RIGHT_FILLING, |
| LEFT_DELAY, RIGHT_DELAY, |
| LEFT_VALID, RIGHT_VALID |
| }; |
| |
| #define LEFT r[0] |
| #define RIGHT r[1] |
| #define PREV r[2] |
| #define MASK(b) (1 << (b)) |
| #define MASK2(a,b) (MASK(a) | MASK(b)) |
| #define MASK3(a,b,c) (MASK2(a,b) | MASK(c)) |
| #define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d)) |
| #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b))) |
| #define STATE_TEST(b) (state & MASK(b)) |
| #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \ |
| ((state &= ~MASK(b)), 0)) |
| #define SWITCH_STATE \ |
| (state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG)) |
| |
| /* |
| * Set up a bunch of variables to make the tests simpler. |
| */ |
| cur = *curp; |
| ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
| ep = xfs_iext_get_ext(ifp, idx); |
| xfs_bmbt_get_all(ep, &PREV); |
| new_endoff = new->br_startoff + new->br_blockcount; |
| ASSERT(PREV.br_startoff <= new->br_startoff); |
| ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); |
| /* |
| * Set flags determining what part of the previous delayed allocation |
| * extent is being replaced by a real allocation. |
| */ |
| STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff); |
| STATE_SET(RIGHT_FILLING, |
| PREV.br_startoff + PREV.br_blockcount == new_endoff); |
| /* |
| * Check and set flags if this segment has a left neighbor. |
| * Don't set contiguous if the combined extent would be too large. |
| */ |
| if (STATE_SET_TEST(LEFT_VALID, idx > 0)) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT); |
| STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(LEFT.br_startblock)); |
| } |
| STATE_SET(LEFT_CONTIG, |
| STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) && |
| LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && |
| LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && |
| LEFT.br_state == new->br_state && |
| LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN); |
| /* |
| * Check and set flags if this segment has a right neighbor. |
| * Don't set contiguous if the combined extent would be too large. |
| * Also check for all-three-contiguous being too large. |
| */ |
| if (STATE_SET_TEST(RIGHT_VALID, |
| idx < |
| ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT); |
| STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(RIGHT.br_startblock)); |
| } |
| STATE_SET(RIGHT_CONTIG, |
| STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) && |
| new_endoff == RIGHT.br_startoff && |
| new->br_startblock + new->br_blockcount == |
| RIGHT.br_startblock && |
| new->br_state == RIGHT.br_state && |
| new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && |
| ((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) != |
| MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) || |
| LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount |
| <= MAXEXTLEN)); |
| error = 0; |
| /* |
| * Switch out based on the FILLING and CONTIG state bits. |
| */ |
| switch (SWITCH_STATE) { |
| |
| case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG): |
| /* |
| * Filling in all of a previously delayed allocation extent. |
| * The left and right neighbors are both contiguous with new. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF|LC|RC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| LEFT.br_blockcount + PREV.br_blockcount + |
| RIGHT.br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|RF|LC|RC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmap_trace_delete(fname, "LF|RF|LC|RC", ip, idx, 2, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx, 2); |
| ip->i_df.if_lastex = idx - 1; |
| ip->i_d.di_nextents--; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, |
| RIGHT.br_startblock, |
| RIGHT.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
| LEFT.br_startblock, |
| LEFT.br_blockcount + |
| PREV.br_blockcount + |
| RIGHT.br_blockcount, LEFT.br_state))) |
| goto done; |
| } |
| *dnew = 0; |
| /* DELTA: Three in-core extents are replaced by one. */ |
| temp = LEFT.br_startoff; |
| temp2 = LEFT.br_blockcount + |
| PREV.br_blockcount + |
| RIGHT.br_blockcount; |
| break; |
| |
| case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG): |
| /* |
| * Filling in all of a previously delayed allocation extent. |
| * The left neighbor is contiguous, the right is not. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| LEFT.br_blockcount + PREV.br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|RF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx - 1; |
| xfs_bmap_trace_delete(fname, "LF|RF|LC", ip, idx, 1, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx, 1); |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff, |
| LEFT.br_startblock, LEFT.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
| LEFT.br_startblock, |
| LEFT.br_blockcount + |
| PREV.br_blockcount, LEFT.br_state))) |
| goto done; |
| } |
| *dnew = 0; |
| /* DELTA: Two in-core extents are replaced by one. */ |
| temp = LEFT.br_startoff; |
| temp2 = LEFT.br_blockcount + |
| PREV.br_blockcount; |
| break; |
| |
| case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG): |
| /* |
| * Filling in all of a previously delayed allocation extent. |
| * The right neighbor is contiguous, the left is not. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_startblock(ep, new->br_startblock); |
| xfs_bmbt_set_blockcount(ep, |
| PREV.br_blockcount + RIGHT.br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx; |
| xfs_bmap_trace_delete(fname, "LF|RF|RC", ip, idx + 1, 1, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx + 1, 1); |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, |
| RIGHT.br_startblock, |
| RIGHT.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
| new->br_startblock, |
| PREV.br_blockcount + |
| RIGHT.br_blockcount, PREV.br_state))) |
| goto done; |
| } |
| *dnew = 0; |
| /* DELTA: Two in-core extents are replaced by one. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount + |
| RIGHT.br_blockcount; |
| break; |
| |
| case MASK2(LEFT_FILLING, RIGHT_FILLING): |
| /* |
| * Filling in all of a previously delayed allocation extent. |
| * Neither the left nor right neighbors are contiguous with |
| * the new one. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_startblock(ep, new->br_startblock); |
| xfs_bmap_trace_post_update(fname, "LF|RF", ip, idx, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx; |
| ip->i_d.di_nextents++; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 0); |
| cur->bc_rec.b.br_state = XFS_EXT_NORM; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| *dnew = 0; |
| /* DELTA: The in-core extent described by new changed type. */ |
| temp = new->br_startoff; |
| temp2 = new->br_blockcount; |
| break; |
| |
| case MASK2(LEFT_FILLING, LEFT_CONTIG): |
| /* |
| * Filling in the first part of a previous delayed allocation. |
| * The left neighbor is contiguous. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| LEFT.br_blockcount + new->br_blockcount); |
| xfs_bmbt_set_startoff(ep, |
| PREV.br_startoff + new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| temp = PREV.br_blockcount - new->br_blockcount; |
| xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, temp); |
| ip->i_df.if_lastex = idx - 1; |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff, |
| LEFT.br_startblock, LEFT.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
| LEFT.br_startblock, |
| LEFT.br_blockcount + |
| new->br_blockcount, |
| LEFT.br_state))) |
| goto done; |
| } |
| temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), |
| STARTBLOCKVAL(PREV.br_startblock)); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx, |
| XFS_DATA_FORK); |
| *dnew = temp; |
| /* DELTA: The boundary between two in-core extents moved. */ |
| temp = LEFT.br_startoff; |
| temp2 = LEFT.br_blockcount + |
| PREV.br_blockcount; |
| break; |
| |
| case MASK(LEFT_FILLING): |
| /* |
| * Filling in the first part of a previous delayed allocation. |
| * The left neighbor is not contiguous. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF", ip, idx, XFS_DATA_FORK); |
| xfs_bmbt_set_startoff(ep, new_endoff); |
| temp = PREV.br_blockcount - new->br_blockcount; |
| xfs_bmbt_set_blockcount(ep, temp); |
| xfs_bmap_trace_insert(fname, "LF", ip, idx, 1, new, NULL, |
| XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx, 1, new); |
| ip->i_df.if_lastex = idx; |
| ip->i_d.di_nextents++; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 0); |
| cur->bc_rec.b.br_state = XFS_EXT_NORM; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| ip->i_d.di_nextents > ip->i_df.if_ext_max) { |
| error = xfs_bmap_extents_to_btree(ip->i_transp, ip, |
| first, flist, &cur, 1, &tmp_rval, |
| XFS_DATA_FORK); |
| rval |= tmp_rval; |
| if (error) |
| goto done; |
| } |
| temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), |
| STARTBLOCKVAL(PREV.br_startblock) - |
| (cur ? cur->bc_private.b.allocated : 0)); |
| ep = xfs_iext_get_ext(ifp, idx + 1); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "LF", ip, idx + 1, |
| XFS_DATA_FORK); |
| *dnew = temp; |
| /* DELTA: One in-core extent is split in two. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount; |
| break; |
| |
| case MASK2(RIGHT_FILLING, RIGHT_CONTIG): |
| /* |
| * Filling in the last part of a previous delayed allocation. |
| * The right neighbor is contiguous with the new allocation. |
| */ |
| temp = PREV.br_blockcount - new->br_blockcount; |
| xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx + 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, temp); |
| xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1), |
| new->br_startoff, new->br_startblock, |
| new->br_blockcount + RIGHT.br_blockcount, |
| RIGHT.br_state); |
| xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx + 1, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx + 1; |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, |
| RIGHT.br_startblock, |
| RIGHT.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, new->br_startoff, |
| new->br_startblock, |
| new->br_blockcount + |
| RIGHT.br_blockcount, |
| RIGHT.br_state))) |
| goto done; |
| } |
| temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), |
| STARTBLOCKVAL(PREV.br_startblock)); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| *dnew = temp; |
| /* DELTA: The boundary between two in-core extents moved. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount + |
| RIGHT.br_blockcount; |
| break; |
| |
| case MASK(RIGHT_FILLING): |
| /* |
| * Filling in the last part of a previous delayed allocation. |
| * The right neighbor is not contiguous. |
| */ |
| temp = PREV.br_blockcount - new->br_blockcount; |
| xfs_bmap_trace_pre_update(fname, "RF", ip, idx, XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, temp); |
| xfs_bmap_trace_insert(fname, "RF", ip, idx + 1, 1, |
| new, NULL, XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx + 1, 1, new); |
| ip->i_df.if_lastex = idx + 1; |
| ip->i_d.di_nextents++; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 0); |
| cur->bc_rec.b.br_state = XFS_EXT_NORM; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| ip->i_d.di_nextents > ip->i_df.if_ext_max) { |
| error = xfs_bmap_extents_to_btree(ip->i_transp, ip, |
| first, flist, &cur, 1, &tmp_rval, |
| XFS_DATA_FORK); |
| rval |= tmp_rval; |
| if (error) |
| goto done; |
| } |
| temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), |
| STARTBLOCKVAL(PREV.br_startblock) - |
| (cur ? cur->bc_private.b.allocated : 0)); |
| ep = xfs_iext_get_ext(ifp, idx); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "RF", ip, idx, XFS_DATA_FORK); |
| *dnew = temp; |
| /* DELTA: One in-core extent is split in two. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount; |
| break; |
| |
| case 0: |
| /* |
| * Filling in the middle part of a previous delayed allocation. |
| * Contiguity is impossible here. |
| * This case is avoided almost all the time. |
| */ |
| temp = new->br_startoff - PREV.br_startoff; |
| xfs_bmap_trace_pre_update(fname, "0", ip, idx, XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, temp); |
| r[0] = *new; |
| r[1].br_startoff = new_endoff; |
| temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; |
| r[1].br_blockcount = temp2; |
| xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 2, &r[0], &r[1], |
| XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx + 1, 2, &r[0]); |
| ip->i_df.if_lastex = idx + 1; |
| ip->i_d.di_nextents++; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 0); |
| cur->bc_rec.b.br_state = XFS_EXT_NORM; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| ip->i_d.di_nextents > ip->i_df.if_ext_max) { |
| error = xfs_bmap_extents_to_btree(ip->i_transp, ip, |
| first, flist, &cur, 1, &tmp_rval, |
| XFS_DATA_FORK); |
| rval |= tmp_rval; |
| if (error) |
| goto done; |
| } |
| temp = xfs_bmap_worst_indlen(ip, temp); |
| temp2 = xfs_bmap_worst_indlen(ip, temp2); |
| diff = (int)(temp + temp2 - STARTBLOCKVAL(PREV.br_startblock) - |
| (cur ? cur->bc_private.b.allocated : 0)); |
| if (diff > 0 && |
| xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS, -diff, rsvd)) { |
| /* |
| * Ick gross gag me with a spoon. |
| */ |
| ASSERT(0); /* want to see if this ever happens! */ |
| while (diff > 0) { |
| if (temp) { |
| temp--; |
| diff--; |
| if (!diff || |
| !xfs_mod_incore_sb(ip->i_mount, |
| XFS_SBS_FDBLOCKS, -diff, rsvd)) |
| break; |
| } |
| if (temp2) { |
| temp2--; |
| diff--; |
| if (!diff || |
| !xfs_mod_incore_sb(ip->i_mount, |
| XFS_SBS_FDBLOCKS, -diff, rsvd)) |
| break; |
| } |
| } |
| } |
| ep = xfs_iext_get_ext(ifp, idx); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "0", ip, idx, XFS_DATA_FORK); |
| xfs_bmap_trace_pre_update(fname, "0", ip, idx + 2, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2), |
| NULLSTARTBLOCK((int)temp2)); |
| xfs_bmap_trace_post_update(fname, "0", ip, idx + 2, |
| XFS_DATA_FORK); |
| *dnew = temp + temp2; |
| /* DELTA: One in-core extent is split in three. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount; |
| break; |
| |
| case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG): |
| case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG): |
| case MASK2(LEFT_FILLING, RIGHT_CONTIG): |
| case MASK2(RIGHT_FILLING, LEFT_CONTIG): |
| case MASK2(LEFT_CONTIG, RIGHT_CONTIG): |
| case MASK(LEFT_CONTIG): |
| case MASK(RIGHT_CONTIG): |
| /* |
| * These cases are all impossible. |
| */ |
| ASSERT(0); |
| } |
| *curp = cur; |
| if (delta) { |
| temp2 += temp; |
| if (delta->xed_startoff > temp) |
| delta->xed_startoff = temp; |
| if (delta->xed_blockcount < temp2) |
| delta->xed_blockcount = temp2; |
| } |
| done: |
| *logflagsp = rval; |
| return error; |
| #undef LEFT |
| #undef RIGHT |
| #undef PREV |
| #undef MASK |
| #undef MASK2 |
| #undef MASK3 |
| #undef MASK4 |
| #undef STATE_SET |
| #undef STATE_TEST |
| #undef STATE_SET_TEST |
| #undef SWITCH_STATE |
| } |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting an unwritten |
| * allocation to a real allocation or vice versa. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_unwritten_real( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta) /* Change made to incore extents */ |
| { |
| xfs_btree_cur_t *cur; /* btree cursor */ |
| xfs_bmbt_rec_t *ep; /* extent entry for idx */ |
| int error; /* error return value */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_add_extent_unwritten_real"; |
| #endif |
| int i; /* temp state */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_fileoff_t new_endoff; /* end offset of new entry */ |
| xfs_exntst_t newext; /* new extent state */ |
| xfs_exntst_t oldext; /* old extent state */ |
| xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ |
| /* left is 0, right is 1, prev is 2 */ |
| int rval=0; /* return value (logging flags) */ |
| int state = 0;/* state bits, accessed thru macros */ |
| xfs_filblks_t temp=0; |
| xfs_filblks_t temp2=0; |
| enum { /* bit number definitions for state */ |
| LEFT_CONTIG, RIGHT_CONTIG, |
| LEFT_FILLING, RIGHT_FILLING, |
| LEFT_DELAY, RIGHT_DELAY, |
| LEFT_VALID, RIGHT_VALID |
| }; |
| |
| #define LEFT r[0] |
| #define RIGHT r[1] |
| #define PREV r[2] |
| #define MASK(b) (1 << (b)) |
| #define MASK2(a,b) (MASK(a) | MASK(b)) |
| #define MASK3(a,b,c) (MASK2(a,b) | MASK(c)) |
| #define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d)) |
| #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b))) |
| #define STATE_TEST(b) (state & MASK(b)) |
| #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \ |
| ((state &= ~MASK(b)), 0)) |
| #define SWITCH_STATE \ |
| (state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG)) |
| |
| /* |
| * Set up a bunch of variables to make the tests simpler. |
| */ |
| error = 0; |
| cur = *curp; |
| ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
| ep = xfs_iext_get_ext(ifp, idx); |
| xfs_bmbt_get_all(ep, &PREV); |
| newext = new->br_state; |
| oldext = (newext == XFS_EXT_UNWRITTEN) ? |
| XFS_EXT_NORM : XFS_EXT_UNWRITTEN; |
| ASSERT(PREV.br_state == oldext); |
| new_endoff = new->br_startoff + new->br_blockcount; |
| ASSERT(PREV.br_startoff <= new->br_startoff); |
| ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); |
| /* |
| * Set flags determining what part of the previous oldext allocation |
| * extent is being replaced by a newext allocation. |
| */ |
| STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff); |
| STATE_SET(RIGHT_FILLING, |
| PREV.br_startoff + PREV.br_blockcount == new_endoff); |
| /* |
| * Check and set flags if this segment has a left neighbor. |
| * Don't set contiguous if the combined extent would be too large. |
| */ |
| if (STATE_SET_TEST(LEFT_VALID, idx > 0)) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT); |
| STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(LEFT.br_startblock)); |
| } |
| STATE_SET(LEFT_CONTIG, |
| STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) && |
| LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && |
| LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && |
| LEFT.br_state == newext && |
| LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN); |
| /* |
| * Check and set flags if this segment has a right neighbor. |
| * Don't set contiguous if the combined extent would be too large. |
| * Also check for all-three-contiguous being too large. |
| */ |
| if (STATE_SET_TEST(RIGHT_VALID, |
| idx < |
| ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT); |
| STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(RIGHT.br_startblock)); |
| } |
| STATE_SET(RIGHT_CONTIG, |
| STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) && |
| new_endoff == RIGHT.br_startoff && |
| new->br_startblock + new->br_blockcount == |
| RIGHT.br_startblock && |
| newext == RIGHT.br_state && |
| new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && |
| ((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) != |
| MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) || |
| LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount |
| <= MAXEXTLEN)); |
| /* |
| * Switch out based on the FILLING and CONTIG state bits. |
| */ |
| switch (SWITCH_STATE) { |
| |
| case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG): |
| /* |
| * Setting all of a previous oldext extent to newext. |
| * The left and right neighbors are both contiguous with new. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF|LC|RC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| LEFT.br_blockcount + PREV.br_blockcount + |
| RIGHT.br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|RF|LC|RC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmap_trace_delete(fname, "LF|RF|LC|RC", ip, idx, 2, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx, 2); |
| ip->i_df.if_lastex = idx - 1; |
| ip->i_d.di_nextents -= 2; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, |
| RIGHT.br_startblock, |
| RIGHT.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
| LEFT.br_startblock, |
| LEFT.br_blockcount + PREV.br_blockcount + |
| RIGHT.br_blockcount, LEFT.br_state))) |
| goto done; |
| } |
| /* DELTA: Three in-core extents are replaced by one. */ |
| temp = LEFT.br_startoff; |
| temp2 = LEFT.br_blockcount + |
| PREV.br_blockcount + |
| RIGHT.br_blockcount; |
| break; |
| |
| case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG): |
| /* |
| * Setting all of a previous oldext extent to newext. |
| * The left neighbor is contiguous, the right is not. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| LEFT.br_blockcount + PREV.br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|RF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx - 1; |
| xfs_bmap_trace_delete(fname, "LF|RF|LC", ip, idx, 1, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx, 1); |
| ip->i_d.di_nextents--; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, |
| PREV.br_startblock, PREV.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
| LEFT.br_startblock, |
| LEFT.br_blockcount + PREV.br_blockcount, |
| LEFT.br_state))) |
| goto done; |
| } |
| /* DELTA: Two in-core extents are replaced by one. */ |
| temp = LEFT.br_startoff; |
| temp2 = LEFT.br_blockcount + |
| PREV.br_blockcount; |
| break; |
| |
| case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG): |
| /* |
| * Setting all of a previous oldext extent to newext. |
| * The right neighbor is contiguous, the left is not. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, |
| PREV.br_blockcount + RIGHT.br_blockcount); |
| xfs_bmbt_set_state(ep, newext); |
| xfs_bmap_trace_post_update(fname, "LF|RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx; |
| xfs_bmap_trace_delete(fname, "LF|RF|RC", ip, idx + 1, 1, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx + 1, 1); |
| ip->i_d.di_nextents--; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, |
| RIGHT.br_startblock, |
| RIGHT.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, new->br_startoff, |
| new->br_startblock, |
| new->br_blockcount + RIGHT.br_blockcount, |
| newext))) |
| goto done; |
| } |
| /* DELTA: Two in-core extents are replaced by one. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount + |
| RIGHT.br_blockcount; |
| break; |
| |
| case MASK2(LEFT_FILLING, RIGHT_FILLING): |
| /* |
| * Setting all of a previous oldext extent to newext. |
| * Neither the left nor right neighbors are contiguous with |
| * the new one. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|RF", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_state(ep, newext); |
| xfs_bmap_trace_post_update(fname, "LF|RF", ip, idx, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx; |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| newext))) |
| goto done; |
| } |
| /* DELTA: The in-core extent described by new changed type. */ |
| temp = new->br_startoff; |
| temp2 = new->br_blockcount; |
| break; |
| |
| case MASK2(LEFT_FILLING, LEFT_CONTIG): |
| /* |
| * Setting the first part of a previous oldext extent to newext. |
| * The left neighbor is contiguous. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| LEFT.br_blockcount + new->br_blockcount); |
| xfs_bmbt_set_startoff(ep, |
| PREV.br_startoff + new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmap_trace_pre_update(fname, "LF|LC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_startblock(ep, |
| new->br_startblock + new->br_blockcount); |
| xfs_bmbt_set_blockcount(ep, |
| PREV.br_blockcount - new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF|LC", ip, idx, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx - 1; |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, |
| PREV.br_startblock, PREV.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, |
| PREV.br_startoff + new->br_blockcount, |
| PREV.br_startblock + new->br_blockcount, |
| PREV.br_blockcount - new->br_blockcount, |
| oldext))) |
| goto done; |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| if (xfs_bmbt_update(cur, LEFT.br_startoff, |
| LEFT.br_startblock, |
| LEFT.br_blockcount + new->br_blockcount, |
| LEFT.br_state)) |
| goto done; |
| } |
| /* DELTA: The boundary between two in-core extents moved. */ |
| temp = LEFT.br_startoff; |
| temp2 = LEFT.br_blockcount + |
| PREV.br_blockcount; |
| break; |
| |
| case MASK(LEFT_FILLING): |
| /* |
| * Setting the first part of a previous oldext extent to newext. |
| * The left neighbor is not contiguous. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LF", ip, idx, XFS_DATA_FORK); |
| ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); |
| xfs_bmbt_set_startoff(ep, new_endoff); |
| xfs_bmbt_set_blockcount(ep, |
| PREV.br_blockcount - new->br_blockcount); |
| xfs_bmbt_set_startblock(ep, |
| new->br_startblock + new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LF", ip, idx, XFS_DATA_FORK); |
| xfs_bmap_trace_insert(fname, "LF", ip, idx, 1, new, NULL, |
| XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx, 1, new); |
| ip->i_df.if_lastex = idx; |
| ip->i_d.di_nextents++; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, |
| PREV.br_startblock, PREV.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, |
| PREV.br_startoff + new->br_blockcount, |
| PREV.br_startblock + new->br_blockcount, |
| PREV.br_blockcount - new->br_blockcount, |
| oldext))) |
| goto done; |
| cur->bc_rec.b = *new; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| /* DELTA: One in-core extent is split in two. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount; |
| break; |
| |
| case MASK2(RIGHT_FILLING, RIGHT_CONTIG): |
| /* |
| * Setting the last part of a previous oldext extent to newext. |
| * The right neighbor is contiguous with the new allocation. |
| */ |
| xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmap_trace_pre_update(fname, "RF|RC", ip, idx + 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, |
| PREV.br_blockcount - new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1), |
| new->br_startoff, new->br_startblock, |
| new->br_blockcount + RIGHT.br_blockcount, newext); |
| xfs_bmap_trace_post_update(fname, "RF|RC", ip, idx + 1, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx + 1; |
| if (cur == NULL) |
| rval = XFS_ILOG_DEXT; |
| else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, |
| PREV.br_startblock, |
| PREV.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
| PREV.br_startblock, |
| PREV.br_blockcount - new->br_blockcount, |
| oldext))) |
| goto done; |
| if ((error = xfs_bmbt_increment(cur, 0, &i))) |
| goto done; |
| if ((error = xfs_bmbt_update(cur, new->br_startoff, |
| new->br_startblock, |
| new->br_blockcount + RIGHT.br_blockcount, |
| newext))) |
| goto done; |
| } |
| /* DELTA: The boundary between two in-core extents moved. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount + |
| RIGHT.br_blockcount; |
| break; |
| |
| case MASK(RIGHT_FILLING): |
| /* |
| * Setting the last part of a previous oldext extent to newext. |
| * The right neighbor is not contiguous. |
| */ |
| xfs_bmap_trace_pre_update(fname, "RF", ip, idx, XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, |
| PREV.br_blockcount - new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "RF", ip, idx, XFS_DATA_FORK); |
| xfs_bmap_trace_insert(fname, "RF", ip, idx + 1, 1, |
| new, NULL, XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx + 1, 1, new); |
| ip->i_df.if_lastex = idx + 1; |
| ip->i_d.di_nextents++; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, |
| PREV.br_startblock, PREV.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
| PREV.br_startblock, |
| PREV.br_blockcount - new->br_blockcount, |
| oldext))) |
| goto done; |
| if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, |
| new->br_startblock, new->br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 0); |
| cur->bc_rec.b.br_state = XFS_EXT_NORM; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| /* DELTA: One in-core extent is split in two. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount; |
| break; |
| |
| case 0: |
| /* |
| * Setting the middle part of a previous oldext extent to |
| * newext. Contiguity is impossible here. |
| * One extent becomes three extents. |
| */ |
| xfs_bmap_trace_pre_update(fname, "0", ip, idx, XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(ep, |
| new->br_startoff - PREV.br_startoff); |
| xfs_bmap_trace_post_update(fname, "0", ip, idx, XFS_DATA_FORK); |
| r[0] = *new; |
| r[1].br_startoff = new_endoff; |
| r[1].br_blockcount = |
| PREV.br_startoff + PREV.br_blockcount - new_endoff; |
| r[1].br_startblock = new->br_startblock + new->br_blockcount; |
| r[1].br_state = oldext; |
| xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 2, &r[0], &r[1], |
| XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx + 1, 2, &r[0]); |
| ip->i_df.if_lastex = idx + 1; |
| ip->i_d.di_nextents += 2; |
| if (cur == NULL) |
| rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; |
| else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, |
| PREV.br_startblock, PREV.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| /* new right extent - oldext */ |
| if ((error = xfs_bmbt_update(cur, r[1].br_startoff, |
| r[1].br_startblock, r[1].br_blockcount, |
| r[1].br_state))) |
| goto done; |
| /* new left extent - oldext */ |
| PREV.br_blockcount = |
| new->br_startoff - PREV.br_startoff; |
| cur->bc_rec.b = PREV; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_increment(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| /* new middle extent - newext */ |
| cur->bc_rec.b = *new; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| /* DELTA: One in-core extent is split in three. */ |
| temp = PREV.br_startoff; |
| temp2 = PREV.br_blockcount; |
| break; |
| |
| case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG): |
| case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG): |
| case MASK2(LEFT_FILLING, RIGHT_CONTIG): |
| case MASK2(RIGHT_FILLING, LEFT_CONTIG): |
| case MASK2(LEFT_CONTIG, RIGHT_CONTIG): |
| case MASK(LEFT_CONTIG): |
| case MASK(RIGHT_CONTIG): |
| /* |
| * These cases are all impossible. |
| */ |
| ASSERT(0); |
| } |
| *curp = cur; |
| if (delta) { |
| temp2 += temp; |
| if (delta->xed_startoff > temp) |
| delta->xed_startoff = temp; |
| if (delta->xed_blockcount < temp2) |
| delta->xed_blockcount = temp2; |
| } |
| done: |
| *logflagsp = rval; |
| return error; |
| #undef LEFT |
| #undef RIGHT |
| #undef PREV |
| #undef MASK |
| #undef MASK2 |
| #undef MASK3 |
| #undef MASK4 |
| #undef STATE_SET |
| #undef STATE_TEST |
| #undef STATE_SET_TEST |
| #undef SWITCH_STATE |
| } |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting a hole |
| * to a delayed allocation. |
| */ |
| /*ARGSUSED*/ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_hole_delay( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t *cur, /* if null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int rsvd) /* OK to allocate reserved blocks */ |
| { |
| xfs_bmbt_rec_t *ep; /* extent record for idx */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_add_extent_hole_delay"; |
| #endif |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_irec_t left; /* left neighbor extent entry */ |
| xfs_filblks_t newlen=0; /* new indirect size */ |
| xfs_filblks_t oldlen=0; /* old indirect size */ |
| xfs_bmbt_irec_t right; /* right neighbor extent entry */ |
| int state; /* state bits, accessed thru macros */ |
| xfs_filblks_t temp=0; /* temp for indirect calculations */ |
| xfs_filblks_t temp2=0; |
| enum { /* bit number definitions for state */ |
| LEFT_CONTIG, RIGHT_CONTIG, |
| LEFT_DELAY, RIGHT_DELAY, |
| LEFT_VALID, RIGHT_VALID |
| }; |
| |
| #define MASK(b) (1 << (b)) |
| #define MASK2(a,b) (MASK(a) | MASK(b)) |
| #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b))) |
| #define STATE_TEST(b) (state & MASK(b)) |
| #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \ |
| ((state &= ~MASK(b)), 0)) |
| #define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG)) |
| |
| ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
| ep = xfs_iext_get_ext(ifp, idx); |
| state = 0; |
| ASSERT(ISNULLSTARTBLOCK(new->br_startblock)); |
| /* |
| * Check and set flags if this segment has a left neighbor |
| */ |
| if (STATE_SET_TEST(LEFT_VALID, idx > 0)) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left); |
| STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(left.br_startblock)); |
| } |
| /* |
| * Check and set flags if the current (right) segment exists. |
| * If it doesn't exist, we're converting the hole at end-of-file. |
| */ |
| if (STATE_SET_TEST(RIGHT_VALID, |
| idx < |
| ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { |
| xfs_bmbt_get_all(ep, &right); |
| STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(right.br_startblock)); |
| } |
| /* |
| * Set contiguity flags on the left and right neighbors. |
| * Don't let extents get too large, even if the pieces are contiguous. |
| */ |
| STATE_SET(LEFT_CONTIG, |
| STATE_TEST(LEFT_VALID) && STATE_TEST(LEFT_DELAY) && |
| left.br_startoff + left.br_blockcount == new->br_startoff && |
| left.br_blockcount + new->br_blockcount <= MAXEXTLEN); |
| STATE_SET(RIGHT_CONTIG, |
| STATE_TEST(RIGHT_VALID) && STATE_TEST(RIGHT_DELAY) && |
| new->br_startoff + new->br_blockcount == right.br_startoff && |
| new->br_blockcount + right.br_blockcount <= MAXEXTLEN && |
| (!STATE_TEST(LEFT_CONTIG) || |
| (left.br_blockcount + new->br_blockcount + |
| right.br_blockcount <= MAXEXTLEN))); |
| /* |
| * Switch out based on the contiguity flags. |
| */ |
| switch (SWITCH_STATE) { |
| |
| case MASK2(LEFT_CONTIG, RIGHT_CONTIG): |
| /* |
| * New allocation is contiguous with delayed allocations |
| * on the left and on the right. |
| * Merge all three into a single extent record. |
| */ |
| temp = left.br_blockcount + new->br_blockcount + |
| right.br_blockcount; |
| xfs_bmap_trace_pre_update(fname, "LC|RC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp); |
| oldlen = STARTBLOCKVAL(left.br_startblock) + |
| STARTBLOCKVAL(new->br_startblock) + |
| STARTBLOCKVAL(right.br_startblock); |
| newlen = xfs_bmap_worst_indlen(ip, temp); |
| xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1), |
| NULLSTARTBLOCK((int)newlen)); |
| xfs_bmap_trace_post_update(fname, "LC|RC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmap_trace_delete(fname, "LC|RC", ip, idx, 1, |
| XFS_DATA_FORK); |
| xfs_iext_remove(ifp, idx, 1); |
| ip->i_df.if_lastex = idx - 1; |
| /* DELTA: Two in-core extents were replaced by one. */ |
| temp2 = temp; |
| temp = left.br_startoff; |
| break; |
| |
| case MASK(LEFT_CONTIG): |
| /* |
| * New allocation is contiguous with a delayed allocation |
| * on the left. |
| * Merge the new allocation with the left neighbor. |
| */ |
| temp = left.br_blockcount + new->br_blockcount; |
| xfs_bmap_trace_pre_update(fname, "LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp); |
| oldlen = STARTBLOCKVAL(left.br_startblock) + |
| STARTBLOCKVAL(new->br_startblock); |
| newlen = xfs_bmap_worst_indlen(ip, temp); |
| xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1), |
| NULLSTARTBLOCK((int)newlen)); |
| xfs_bmap_trace_post_update(fname, "LC", ip, idx - 1, |
| XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx - 1; |
| /* DELTA: One in-core extent grew into a hole. */ |
| temp2 = temp; |
| temp = left.br_startoff; |
| break; |
| |
| case MASK(RIGHT_CONTIG): |
| /* |
| * New allocation is contiguous with a delayed allocation |
| * on the right. |
| * Merge the new allocation with the right neighbor. |
| */ |
| xfs_bmap_trace_pre_update(fname, "RC", ip, idx, XFS_DATA_FORK); |
| temp = new->br_blockcount + right.br_blockcount; |
| oldlen = STARTBLOCKVAL(new->br_startblock) + |
| STARTBLOCKVAL(right.br_startblock); |
| newlen = xfs_bmap_worst_indlen(ip, temp); |
| xfs_bmbt_set_allf(ep, new->br_startoff, |
| NULLSTARTBLOCK((int)newlen), temp, right.br_state); |
| xfs_bmap_trace_post_update(fname, "RC", ip, idx, XFS_DATA_FORK); |
| ip->i_df.if_lastex = idx; |
| /* DELTA: One in-core extent grew into a hole. */ |
| temp2 = temp; |
| temp = new->br_startoff; |
| break; |
| |
| case 0: |
| /* |
| * New allocation is not contiguous with another |
| * delayed allocation. |
| * Insert a new entry. |
| */ |
| oldlen = newlen = 0; |
| xfs_bmap_trace_insert(fname, "0", ip, idx, 1, new, NULL, |
| XFS_DATA_FORK); |
| xfs_iext_insert(ifp, idx, 1, new); |
| ip->i_df.if_lastex = idx; |
| /* DELTA: A new in-core extent was added in a hole. */ |
| temp2 = new->br_blockcount; |
| temp = new->br_startoff; |
| break; |
| } |
| if (oldlen != newlen) { |
| ASSERT(oldlen > newlen); |
| xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS, |
| (int)(oldlen - newlen), rsvd); |
| /* |
| * Nothing to do for disk quota accounting here. |
| */ |
| } |
| if (delta) { |
| temp2 += temp; |
| if (delta->xed_startoff > temp) |
| delta->xed_startoff = temp; |
| if (delta->xed_blockcount < temp2) |
| delta->xed_blockcount = temp2; |
| } |
| *logflagsp = 0; |
| return 0; |
| #undef MASK |
| #undef MASK2 |
| #undef STATE_SET |
| #undef STATE_TEST |
| #undef STATE_SET_TEST |
| #undef SWITCH_STATE |
| } |
| |
| /* |
| * Called by xfs_bmap_add_extent to handle cases converting a hole |
| * to a real allocation. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_add_extent_hole_real( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* extent number to update/insert */ |
| xfs_btree_cur_t *cur, /* if null, not a btree */ |
| xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t *ep; /* pointer to extent entry ins. point */ |
| int error; /* error return value */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_add_extent_hole_real"; |
| #endif |
| int i; /* temp state */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_irec_t left; /* left neighbor extent entry */ |
| xfs_bmbt_irec_t right; /* right neighbor extent entry */ |
| int rval=0; /* return value (logging flags) */ |
| int state; /* state bits, accessed thru macros */ |
| xfs_filblks_t temp=0; |
| xfs_filblks_t temp2=0; |
| enum { /* bit number definitions for state */ |
| LEFT_CONTIG, RIGHT_CONTIG, |
| LEFT_DELAY, RIGHT_DELAY, |
| LEFT_VALID, RIGHT_VALID |
| }; |
| |
| #define MASK(b) (1 << (b)) |
| #define MASK2(a,b) (MASK(a) | MASK(b)) |
| #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b))) |
| #define STATE_TEST(b) (state & MASK(b)) |
| #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \ |
| ((state &= ~MASK(b)), 0)) |
| #define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG)) |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(idx <= ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)); |
| ep = xfs_iext_get_ext(ifp, idx); |
| state = 0; |
| /* |
| * Check and set flags if this segment has a left neighbor. |
| */ |
| if (STATE_SET_TEST(LEFT_VALID, idx > 0)) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left); |
| STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(left.br_startblock)); |
| } |
| /* |
| * Check and set flags if this segment has a current value. |
| * Not true if we're inserting into the "hole" at eof. |
| */ |
| if (STATE_SET_TEST(RIGHT_VALID, |
| idx < |
| ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { |
| xfs_bmbt_get_all(ep, &right); |
| STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(right.br_startblock)); |
| } |
| /* |
| * We're inserting a real allocation between "left" and "right". |
| * Set the contiguity flags. Don't let extents get too large. |
| */ |
| STATE_SET(LEFT_CONTIG, |
| STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) && |
| left.br_startoff + left.br_blockcount == new->br_startoff && |
| left.br_startblock + left.br_blockcount == new->br_startblock && |
| left.br_state == new->br_state && |
| left.br_blockcount + new->br_blockcount <= MAXEXTLEN); |
| STATE_SET(RIGHT_CONTIG, |
| STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) && |
| new->br_startoff + new->br_blockcount == right.br_startoff && |
| new->br_startblock + new->br_blockcount == |
| right.br_startblock && |
| new->br_state == right.br_state && |
| new->br_blockcount + right.br_blockcount <= MAXEXTLEN && |
| (!STATE_TEST(LEFT_CONTIG) || |
| left.br_blockcount + new->br_blockcount + |
| right.br_blockcount <= MAXEXTLEN)); |
| |
| error = 0; |
| /* |
| * Select which case we're in here, and implement it. |
| */ |
| switch (SWITCH_STATE) { |
| |
| case MASK2(LEFT_CONTIG, RIGHT_CONTIG): |
| /* |
| * New allocation is contiguous with real allocations on the |
| * left and on the right. |
| * Merge all three into a single extent record. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LC|RC", ip, idx - 1, |
| whichfork); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| left.br_blockcount + new->br_blockcount + |
| right.br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LC|RC", ip, idx - 1, |
| whichfork); |
| xfs_bmap_trace_delete(fname, "LC|RC", ip, |
| idx, 1, whichfork); |
| xfs_iext_remove(ifp, idx, 1); |
| ifp->if_lastex = idx - 1; |
| XFS_IFORK_NEXT_SET(ip, whichfork, |
| XFS_IFORK_NEXTENTS(ip, whichfork) - 1); |
| if (cur == NULL) { |
| rval = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork); |
| } else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, |
| right.br_startoff, |
| right.br_startblock, |
| right.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_decrement(cur, 0, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, left.br_startoff, |
| left.br_startblock, |
| left.br_blockcount + |
| new->br_blockcount + |
| right.br_blockcount, |
| left.br_state))) |
| goto done; |
| } |
| /* DELTA: Two in-core extents were replaced by one. */ |
| temp = left.br_startoff; |
| temp2 = left.br_blockcount + |
| new->br_blockcount + |
| right.br_blockcount; |
| break; |
| |
| case MASK(LEFT_CONTIG): |
| /* |
| * New allocation is contiguous with a real allocation |
| * on the left. |
| * Merge the new allocation with the left neighbor. |
| */ |
| xfs_bmap_trace_pre_update(fname, "LC", ip, idx - 1, whichfork); |
| xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
| left.br_blockcount + new->br_blockcount); |
| xfs_bmap_trace_post_update(fname, "LC", ip, idx - 1, whichfork); |
| ifp->if_lastex = idx - 1; |
| if (cur == NULL) { |
| rval = XFS_ILOG_FEXT(whichfork); |
| } else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, |
| left.br_startoff, |
| left.br_startblock, |
| left.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, left.br_startoff, |
| left.br_startblock, |
| left.br_blockcount + |
| new->br_blockcount, |
| left.br_state))) |
| goto done; |
| } |
| /* DELTA: One in-core extent grew. */ |
| temp = left.br_startoff; |
| temp2 = left.br_blockcount + |
| new->br_blockcount; |
| break; |
| |
| case MASK(RIGHT_CONTIG): |
| /* |
| * New allocation is contiguous with a real allocation |
| * on the right. |
| * Merge the new allocation with the right neighbor. |
| */ |
| xfs_bmap_trace_pre_update(fname, "RC", ip, idx, whichfork); |
| xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock, |
| new->br_blockcount + right.br_blockcount, |
| right.br_state); |
| xfs_bmap_trace_post_update(fname, "RC", ip, idx, whichfork); |
| ifp->if_lastex = idx; |
| if (cur == NULL) { |
| rval = XFS_ILOG_FEXT(whichfork); |
| } else { |
| rval = 0; |
| if ((error = xfs_bmbt_lookup_eq(cur, |
| right.br_startoff, |
| right.br_startblock, |
| right.br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 1); |
| if ((error = xfs_bmbt_update(cur, new->br_startoff, |
| new->br_startblock, |
| new->br_blockcount + |
| right.br_blockcount, |
| right.br_state))) |
| goto done; |
| } |
| /* DELTA: One in-core extent grew. */ |
| temp = new->br_startoff; |
| temp2 = new->br_blockcount + |
| right.br_blockcount; |
| break; |
| |
| case 0: |
| /* |
| * New allocation is not contiguous with another |
| * real allocation. |
| * Insert a new entry. |
| */ |
| xfs_bmap_trace_insert(fname, "0", ip, idx, 1, new, NULL, |
| whichfork); |
| xfs_iext_insert(ifp, idx, 1, new); |
| ifp->if_lastex = idx; |
| XFS_IFORK_NEXT_SET(ip, whichfork, |
| XFS_IFORK_NEXTENTS(ip, whichfork) + 1); |
| if (cur == NULL) { |
| rval = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork); |
| } else { |
| rval = XFS_ILOG_CORE; |
| if ((error = xfs_bmbt_lookup_eq(cur, |
| new->br_startoff, |
| new->br_startblock, |
| new->br_blockcount, &i))) |
| goto done; |
| ASSERT(i == 0); |
| cur->bc_rec.b.br_state = new->br_state; |
| if ((error = xfs_bmbt_insert(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| /* DELTA: A new extent was added in a hole. */ |
| temp = new->br_startoff; |
| temp2 = new->br_blockcount; |
| break; |
| } |
| if (delta) { |
| temp2 += temp; |
| if (delta->xed_startoff > temp) |
| delta->xed_startoff = temp; |
| if (delta->xed_blockcount < temp2) |
| delta->xed_blockcount = temp2; |
| } |
| done: |
| *logflagsp = rval; |
| return error; |
| #undef MASK |
| #undef MASK2 |
| #undef STATE_SET |
| #undef STATE_TEST |
| #undef STATE_SET_TEST |
| #undef SWITCH_STATE |
| } |
| |
| /* |
| * Adjust the size of the new extent based on di_extsize and rt extsize. |
| */ |
| STATIC int |
| xfs_bmap_extsize_align( |
| xfs_mount_t *mp, |
| xfs_bmbt_irec_t *gotp, /* next extent pointer */ |
| xfs_bmbt_irec_t *prevp, /* previous extent pointer */ |
| xfs_extlen_t extsz, /* align to this extent size */ |
| int rt, /* is this a realtime inode? */ |
| int eof, /* is extent at end-of-file? */ |
| int delay, /* creating delalloc extent? */ |
| int convert, /* overwriting unwritten extent? */ |
| xfs_fileoff_t *offp, /* in/out: aligned offset */ |
| xfs_extlen_t *lenp) /* in/out: aligned length */ |
| { |
| xfs_fileoff_t orig_off; /* original offset */ |
| xfs_extlen_t orig_alen; /* original length */ |
| xfs_fileoff_t orig_end; /* original off+len */ |
| xfs_fileoff_t nexto; /* next file offset */ |
| xfs_fileoff_t prevo; /* previous file offset */ |
| xfs_fileoff_t align_off; /* temp for offset */ |
| xfs_extlen_t align_alen; /* temp for length */ |
| xfs_extlen_t temp; /* temp for calculations */ |
| |
| if (convert) |
| return 0; |
| |
| orig_off = align_off = *offp; |
| orig_alen = align_alen = *lenp; |
| orig_end = orig_off + orig_alen; |
| |
| /* |
| * If this request overlaps an existing extent, then don't |
| * attempt to perform any additional alignment. |
| */ |
| if (!delay && !eof && |
| (orig_off >= gotp->br_startoff) && |
| (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { |
| return 0; |
| } |
| |
| /* |
| * If the file offset is unaligned vs. the extent size |
| * we need to align it. This will be possible unless |
| * the file was previously written with a kernel that didn't |
| * perform this alignment, or if a truncate shot us in the |
| * foot. |
| */ |
| temp = do_mod(orig_off, extsz); |
| if (temp) { |
| align_alen += temp; |
| align_off -= temp; |
| } |
| /* |
| * Same adjustment for the end of the requested area. |
| */ |
| if ((temp = (align_alen % extsz))) { |
| align_alen += extsz - temp; |
| } |
| /* |
| * If the previous block overlaps with this proposed allocation |
| * then move the start forward without adjusting the length. |
| */ |
| if (prevp->br_startoff != NULLFILEOFF) { |
| if (prevp->br_startblock == HOLESTARTBLOCK) |
| prevo = prevp->br_startoff; |
| else |
| prevo = prevp->br_startoff + prevp->br_blockcount; |
| } else |
| prevo = 0; |
| if (align_off != orig_off && align_off < prevo) |
| align_off = prevo; |
| /* |
| * If the next block overlaps with this proposed allocation |
| * then move the start back without adjusting the length, |
| * but not before offset 0. |
| * This may of course make the start overlap previous block, |
| * and if we hit the offset 0 limit then the next block |
| * can still overlap too. |
| */ |
| if (!eof && gotp->br_startoff != NULLFILEOFF) { |
| if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || |
| (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) |
| nexto = gotp->br_startoff + gotp->br_blockcount; |
| else |
| nexto = gotp->br_startoff; |
| } else |
| nexto = NULLFILEOFF; |
| if (!eof && |
| align_off + align_alen != orig_end && |
| align_off + align_alen > nexto) |
| align_off = nexto > align_alen ? nexto - align_alen : 0; |
| /* |
| * If we're now overlapping the next or previous extent that |
| * means we can't fit an extsz piece in this hole. Just move |
| * the start forward to the first valid spot and set |
| * the length so we hit the end. |
| */ |
| if (align_off != orig_off && align_off < prevo) |
| align_off = prevo; |
| if (align_off + align_alen != orig_end && |
| align_off + align_alen > nexto && |
| nexto != NULLFILEOFF) { |
| ASSERT(nexto > prevo); |
| align_alen = nexto - align_off; |
| } |
| |
| /* |
| * If realtime, and the result isn't a multiple of the realtime |
| * extent size we need to remove blocks until it is. |
| */ |
| if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { |
| /* |
| * We're not covering the original request, or |
| * we won't be able to once we fix the length. |
| */ |
| if (orig_off < align_off || |
| orig_end > align_off + align_alen || |
| align_alen - temp < orig_alen) |
| return XFS_ERROR(EINVAL); |
| /* |
| * Try to fix it by moving the start up. |
| */ |
| if (align_off + temp <= orig_off) { |
| align_alen -= temp; |
| align_off += temp; |
| } |
| /* |
| * Try to fix it by moving the end in. |
| */ |
| else if (align_off + align_alen - temp >= orig_end) |
| align_alen -= temp; |
| /* |
| * Set the start to the minimum then trim the length. |
| */ |
| else { |
| align_alen -= orig_off - align_off; |
| align_off = orig_off; |
| align_alen -= align_alen % mp->m_sb.sb_rextsize; |
| } |
| /* |
| * Result doesn't cover the request, fail it. |
| */ |
| if (orig_off < align_off || orig_end > align_off + align_alen) |
| return XFS_ERROR(EINVAL); |
| } else { |
| ASSERT(orig_off >= align_off); |
| ASSERT(orig_end <= align_off + align_alen); |
| } |
| |
| #ifdef DEBUG |
| if (!eof && gotp->br_startoff != NULLFILEOFF) |
| ASSERT(align_off + align_alen <= gotp->br_startoff); |
| if (prevp->br_startoff != NULLFILEOFF) |
| ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); |
| #endif |
| |
| *lenp = align_alen; |
| *offp = align_off; |
| return 0; |
| } |
| |
| #define XFS_ALLOC_GAP_UNITS 4 |
| |
| STATIC int |
| xfs_bmap_adjacent( |
| xfs_bmalloca_t *ap) /* bmap alloc argument struct */ |
| { |
| xfs_fsblock_t adjust; /* adjustment to block numbers */ |
| xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ |
| xfs_mount_t *mp; /* mount point structure */ |
| int nullfb; /* true if ap->firstblock isn't set */ |
| int rt; /* true if inode is realtime */ |
| |
| #define ISVALID(x,y) \ |
| (rt ? \ |
| (x) < mp->m_sb.sb_rblocks : \ |
| XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ |
| XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ |
| XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) |
| |
| mp = ap->ip->i_mount; |
| nullfb = ap->firstblock == NULLFSBLOCK; |
| rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata; |
| fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock); |
| /* |
| * If allocating at eof, and there's a previous real block, |
| * try to use it's last block as our starting point. |
| */ |
| if (ap->eof && ap->prevp->br_startoff != NULLFILEOFF && |
| !ISNULLSTARTBLOCK(ap->prevp->br_startblock) && |
| ISVALID(ap->prevp->br_startblock + ap->prevp->br_blockcount, |
| ap->prevp->br_startblock)) { |
| ap->rval = ap->prevp->br_startblock + ap->prevp->br_blockcount; |
| /* |
| * Adjust for the gap between prevp and us. |
| */ |
| adjust = ap->off - |
| (ap->prevp->br_startoff + ap->prevp->br_blockcount); |
| if (adjust && |
| ISVALID(ap->rval + adjust, ap->prevp->br_startblock)) |
| ap->rval += adjust; |
| } |
| /* |
| * If not at eof, then compare the two neighbor blocks. |
| * Figure out whether either one gives us a good starting point, |
| * and pick the better one. |
| */ |
| else if (!ap->eof) { |
| xfs_fsblock_t gotbno; /* right side block number */ |
| xfs_fsblock_t gotdiff=0; /* right side difference */ |
| xfs_fsblock_t prevbno; /* left side block number */ |
| xfs_fsblock_t prevdiff=0; /* left side difference */ |
| |
| /* |
| * If there's a previous (left) block, select a requested |
| * start block based on it. |
| */ |
| if (ap->prevp->br_startoff != NULLFILEOFF && |
| !ISNULLSTARTBLOCK(ap->prevp->br_startblock) && |
| (prevbno = ap->prevp->br_startblock + |
| ap->prevp->br_blockcount) && |
| ISVALID(prevbno, ap->prevp->br_startblock)) { |
| /* |
| * Calculate gap to end of previous block. |
| */ |
| adjust = prevdiff = ap->off - |
| (ap->prevp->br_startoff + |
| ap->prevp->br_blockcount); |
| /* |
| * Figure the startblock based on the previous block's |
| * end and the gap size. |
| * Heuristic! |
| * If the gap is large relative to the piece we're |
| * allocating, or using it gives us an invalid block |
| * number, then just use the end of the previous block. |
| */ |
| if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->alen && |
| ISVALID(prevbno + prevdiff, |
| ap->prevp->br_startblock)) |
| prevbno += adjust; |
| else |
| prevdiff += adjust; |
| /* |
| * If the firstblock forbids it, can't use it, |
| * must use default. |
| */ |
| if (!rt && !nullfb && |
| XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) |
| prevbno = NULLFSBLOCK; |
| } |
| /* |
| * No previous block or can't follow it, just default. |
| */ |
| else |
| prevbno = NULLFSBLOCK; |
| /* |
| * If there's a following (right) block, select a requested |
| * start block based on it. |
| */ |
| if (!ISNULLSTARTBLOCK(ap->gotp->br_startblock)) { |
| /* |
| * Calculate gap to start of next block. |
| */ |
| adjust = gotdiff = ap->gotp->br_startoff - ap->off; |
| /* |
| * Figure the startblock based on the next block's |
| * start and the gap size. |
| */ |
| gotbno = ap->gotp->br_startblock; |
| /* |
| * Heuristic! |
| * If the gap is large relative to the piece we're |
| * allocating, or using it gives us an invalid block |
| * number, then just use the start of the next block |
| * offset by our length. |
| */ |
| if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->alen && |
| ISVALID(gotbno - gotdiff, gotbno)) |
| gotbno -= adjust; |
| else if (ISVALID(gotbno - ap->alen, gotbno)) { |
| gotbno -= ap->alen; |
| gotdiff += adjust - ap->alen; |
| } else |
| gotdiff += adjust; |
| /* |
| * If the firstblock forbids it, can't use it, |
| * must use default. |
| */ |
| if (!rt && !nullfb && |
| XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) |
| gotbno = NULLFSBLOCK; |
| } |
| /* |
| * No next block, just default. |
| */ |
| else |
| gotbno = NULLFSBLOCK; |
| /* |
| * If both valid, pick the better one, else the only good |
| * one, else ap->rval is already set (to 0 or the inode block). |
| */ |
| if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) |
| ap->rval = prevdiff <= gotdiff ? prevbno : gotbno; |
| else if (prevbno != NULLFSBLOCK) |
| ap->rval = prevbno; |
| else if (gotbno != NULLFSBLOCK) |
| ap->rval = gotbno; |
| } |
| #undef ISVALID |
| return 0; |
| } |
| |
| STATIC int |
| xfs_bmap_rtalloc( |
| xfs_bmalloca_t *ap) /* bmap alloc argument struct */ |
| { |
| xfs_alloctype_t atype = 0; /* type for allocation routines */ |
| int error; /* error return value */ |
| xfs_mount_t *mp; /* mount point structure */ |
| xfs_extlen_t prod = 0; /* product factor for allocators */ |
| xfs_extlen_t ralen = 0; /* realtime allocation length */ |
| xfs_extlen_t align; /* minimum allocation alignment */ |
| xfs_rtblock_t rtx; /* realtime extent number */ |
| xfs_rtblock_t rtb; |
| |
| mp = ap->ip->i_mount; |
| align = ap->ip->i_d.di_extsize ? |
| ap->ip->i_d.di_extsize : mp->m_sb.sb_rextsize; |
| prod = align / mp->m_sb.sb_rextsize; |
| error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp, |
| align, 1, ap->eof, 0, |
| ap->conv, &ap->off, &ap->alen); |
| if (error) |
| return error; |
| ASSERT(ap->alen); |
| ASSERT(ap->alen % mp->m_sb.sb_rextsize == 0); |
| |
| /* |
| * If the offset & length are not perfectly aligned |
| * then kill prod, it will just get us in trouble. |
| */ |
| if (do_mod(ap->off, align) || ap->alen % align) |
| prod = 1; |
| /* |
| * Set ralen to be the actual requested length in rtextents. |
| */ |
| ralen = ap->alen / mp->m_sb.sb_rextsize; |
| /* |
| * If the old value was close enough to MAXEXTLEN that |
| * we rounded up to it, cut it back so it's valid again. |
| * Note that if it's a really large request (bigger than |
| * MAXEXTLEN), we don't hear about that number, and can't |
| * adjust the starting point to match it. |
| */ |
| if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN) |
| ralen = MAXEXTLEN / mp->m_sb.sb_rextsize; |
| /* |
| * If it's an allocation to an empty file at offset 0, |
| * pick an extent that will space things out in the rt area. |
| */ |
| if (ap->eof && ap->off == 0) { |
| error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx); |
| if (error) |
| return error; |
| ap->rval = rtx * mp->m_sb.sb_rextsize; |
| } else { |
| ap->rval = 0; |
| } |
| |
| xfs_bmap_adjacent(ap); |
| |
| /* |
| * Realtime allocation, done through xfs_rtallocate_extent. |
| */ |
| atype = ap->rval == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO; |
| do_div(ap->rval, mp->m_sb.sb_rextsize); |
| rtb = ap->rval; |
| ap->alen = ralen; |
| if ((error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, ap->alen, |
| &ralen, atype, ap->wasdel, prod, &rtb))) |
| return error; |
| if (rtb == NULLFSBLOCK && prod > 1 && |
| (error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, |
| ap->alen, &ralen, atype, |
| ap->wasdel, 1, &rtb))) |
| return error; |
| ap->rval = rtb; |
| if (ap->rval != NULLFSBLOCK) { |
| ap->rval *= mp->m_sb.sb_rextsize; |
| ralen *= mp->m_sb.sb_rextsize; |
| ap->alen = ralen; |
| ap->ip->i_d.di_nblocks += ralen; |
| xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); |
| if (ap->wasdel) |
| ap->ip->i_delayed_blks -= ralen; |
| /* |
| * Adjust the disk quota also. This was reserved |
| * earlier. |
| */ |
| XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip, |
| ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT : |
| XFS_TRANS_DQ_RTBCOUNT, (long) ralen); |
| } else { |
| ap->alen = 0; |
| } |
| return 0; |
| } |
| |
| STATIC int |
| xfs_bmap_btalloc( |
| xfs_bmalloca_t *ap) /* bmap alloc argument struct */ |
| { |
| xfs_mount_t *mp; /* mount point structure */ |
| xfs_alloctype_t atype = 0; /* type for allocation routines */ |
| xfs_extlen_t align; /* minimum allocation alignment */ |
| xfs_agnumber_t ag; |
| xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ |
| xfs_agnumber_t startag; |
| xfs_alloc_arg_t args; |
| xfs_extlen_t blen; |
| xfs_extlen_t delta; |
| xfs_extlen_t longest; |
| xfs_extlen_t need; |
| xfs_extlen_t nextminlen = 0; |
| xfs_perag_t *pag; |
| int nullfb; /* true if ap->firstblock isn't set */ |
| int isaligned; |
| int notinit; |
| int tryagain; |
| int error; |
| |
| mp = ap->ip->i_mount; |
| align = (ap->userdata && ap->ip->i_d.di_extsize && |
| (ap->ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE)) ? |
| ap->ip->i_d.di_extsize : 0; |
| if (unlikely(align)) { |
| error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp, |
| align, 0, ap->eof, 0, ap->conv, |
| &ap->off, &ap->alen); |
| ASSERT(!error); |
| ASSERT(ap->alen); |
| } |
| nullfb = ap->firstblock == NULLFSBLOCK; |
| fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock); |
| if (nullfb) |
| ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino); |
| else |
| ap->rval = ap->firstblock; |
| |
| xfs_bmap_adjacent(ap); |
| |
| /* |
| * If allowed, use ap->rval; otherwise must use firstblock since |
| * it's in the right allocation group. |
| */ |
| if (nullfb || XFS_FSB_TO_AGNO(mp, ap->rval) == fb_agno) |
| ; |
| else |
| ap->rval = ap->firstblock; |
| /* |
| * Normal allocation, done through xfs_alloc_vextent. |
| */ |
| tryagain = isaligned = 0; |
| args.tp = ap->tp; |
| args.mp = mp; |
| args.fsbno = ap->rval; |
| args.maxlen = MIN(ap->alen, mp->m_sb.sb_agblocks); |
| args.firstblock = ap->firstblock; |
| blen = 0; |
| if (nullfb) { |
| args.type = XFS_ALLOCTYPE_START_BNO; |
| args.total = ap->total; |
| /* |
| * Find the longest available space. |
| * We're going to try for the whole allocation at once. |
| */ |
| startag = ag = XFS_FSB_TO_AGNO(mp, args.fsbno); |
| notinit = 0; |
| down_read(&mp->m_peraglock); |
| while (blen < ap->alen) { |
| pag = &mp->m_perag[ag]; |
| if (!pag->pagf_init && |
| (error = xfs_alloc_pagf_init(mp, args.tp, |
| ag, XFS_ALLOC_FLAG_TRYLOCK))) { |
| up_read(&mp->m_peraglock); |
| return error; |
| } |
| /* |
| * See xfs_alloc_fix_freelist... |
| */ |
| if (pag->pagf_init) { |
| need = XFS_MIN_FREELIST_PAG(pag, mp); |
| delta = need > pag->pagf_flcount ? |
| need - pag->pagf_flcount : 0; |
| longest = (pag->pagf_longest > delta) ? |
| (pag->pagf_longest - delta) : |
| (pag->pagf_flcount > 0 || |
| pag->pagf_longest > 0); |
| if (blen < longest) |
| blen = longest; |
| } else |
| notinit = 1; |
| if (++ag == mp->m_sb.sb_agcount) |
| ag = 0; |
| if (ag == startag) |
| break; |
| } |
| up_read(&mp->m_peraglock); |
| /* |
| * Since the above loop did a BUF_TRYLOCK, it is |
| * possible that there is space for this request. |
| */ |
| if (notinit || blen < ap->minlen) |
| args.minlen = ap->minlen; |
| /* |
| * If the best seen length is less than the request |
| * length, use the best as the minimum. |
| */ |
| else if (blen < ap->alen) |
| args.minlen = blen; |
| /* |
| * Otherwise we've seen an extent as big as alen, |
| * use that as the minimum. |
| */ |
| else |
| args.minlen = ap->alen; |
| } else if (ap->low) { |
| args.type = XFS_ALLOCTYPE_START_BNO; |
| args.total = args.minlen = ap->minlen; |
| } else { |
| args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| args.total = ap->total; |
| args.minlen = ap->minlen; |
| } |
| if (unlikely(ap->userdata && ap->ip->i_d.di_extsize && |
| (ap->ip->i_d.di_flags & XFS_DIFLAG_EXTSIZE))) { |
| args.prod = ap->ip->i_d.di_extsize; |
| if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod))) |
| args.mod = (xfs_extlen_t)(args.prod - args.mod); |
| } else if (mp->m_sb.sb_blocksize >= NBPP) { |
| args.prod = 1; |
| args.mod = 0; |
| } else { |
| args.prod = NBPP >> mp->m_sb.sb_blocklog; |
| if ((args.mod = (xfs_extlen_t)(do_mod(ap->off, args.prod)))) |
| args.mod = (xfs_extlen_t)(args.prod - args.mod); |
| } |
| /* |
| * If we are not low on available data blocks, and the |
| * underlying logical volume manager is a stripe, and |
| * the file offset is zero then try to allocate data |
| * blocks on stripe unit boundary. |
| * NOTE: ap->aeof is only set if the allocation length |
| * is >= the stripe unit and the allocation offset is |
| * at the end of file. |
| */ |
| if (!ap->low && ap->aeof) { |
| if (!ap->off) { |
| args.alignment = mp->m_dalign; |
| atype = args.type; |
| isaligned = 1; |
| /* |
| * Adjust for alignment |
| */ |
| if (blen > args.alignment && blen <= ap->alen) |
| args.minlen = blen - args.alignment; |
| args.minalignslop = 0; |
| } else { |
| /* |
| * First try an exact bno allocation. |
| * If it fails then do a near or start bno |
| * allocation with alignment turned on. |
| */ |
| atype = args.type; |
| tryagain = 1; |
| args.type = XFS_ALLOCTYPE_THIS_BNO; |
| args.alignment = 1; |
| /* |
| * Compute the minlen+alignment for the |
| * next case. Set slop so that the value |
| * of minlen+alignment+slop doesn't go up |
| * between the calls. |
| */ |
| if (blen > mp->m_dalign && blen <= ap->alen) |
| nextminlen = blen - mp->m_dalign; |
| else |
| nextminlen = args.minlen; |
| if (nextminlen + mp->m_dalign > args.minlen + 1) |
| args.minalignslop = |
| nextminlen + mp->m_dalign - |
| args.minlen - 1; |
| else |
| args.minalignslop = 0; |
| } |
| } else { |
| args.alignment = 1; |
| args.minalignslop = 0; |
| } |
| args.minleft = ap->minleft; |
| args.wasdel = ap->wasdel; |
| args.isfl = 0; |
| args.userdata = ap->userdata; |
| if ((error = xfs_alloc_vextent(&args))) |
| return error; |
| if (tryagain && args.fsbno == NULLFSBLOCK) { |
| /* |
| * Exact allocation failed. Now try with alignment |
| * turned on. |
| */ |
| args.type = atype; |
| args.fsbno = ap->rval; |
| args.alignment = mp->m_dalign; |
| args.minlen = nextminlen; |
| args.minalignslop = 0; |
| isaligned = 1; |
| if ((error = xfs_alloc_vextent(&args))) |
| return error; |
| } |
| if (isaligned && args.fsbno == NULLFSBLOCK) { |
| /* |
| * allocation failed, so turn off alignment and |
| * try again. |
| */ |
| args.type = atype; |
| args.fsbno = ap->rval; |
| args.alignment = 0; |
| if ((error = xfs_alloc_vextent(&args))) |
| return error; |
| } |
| if (args.fsbno == NULLFSBLOCK && nullfb && |
| args.minlen > ap->minlen) { |
| args.minlen = ap->minlen; |
| args.type = XFS_ALLOCTYPE_START_BNO; |
| args.fsbno = ap->rval; |
| if ((error = xfs_alloc_vextent(&args))) |
| return error; |
| } |
| if (args.fsbno == NULLFSBLOCK && nullfb) { |
| args.fsbno = 0; |
| args.type = XFS_ALLOCTYPE_FIRST_AG; |
| args.total = ap->minlen; |
| args.minleft = 0; |
| if ((error = xfs_alloc_vextent(&args))) |
| return error; |
| ap->low = 1; |
| } |
| if (args.fsbno != NULLFSBLOCK) { |
| ap->firstblock = ap->rval = args.fsbno; |
| ASSERT(nullfb || fb_agno == args.agno || |
| (ap->low && fb_agno < args.agno)); |
| ap->alen = args.len; |
| ap->ip->i_d.di_nblocks += args.len; |
| xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); |
| if (ap->wasdel) |
| ap->ip->i_delayed_blks -= args.len; |
| /* |
| * Adjust the disk quota also. This was reserved |
| * earlier. |
| */ |
| XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip, |
| ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : |
| XFS_TRANS_DQ_BCOUNT, |
| (long) args.len); |
| } else { |
| ap->rval = NULLFSBLOCK; |
| ap->alen = 0; |
| } |
| return 0; |
| } |
| |
| /* |
| * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. |
| * It figures out where to ask the underlying allocator to put the new extent. |
| */ |
| STATIC int |
| xfs_bmap_alloc( |
| xfs_bmalloca_t *ap) /* bmap alloc argument struct */ |
| { |
| if ((ap->ip->i_d.di_flags & XFS_DIFLAG_REALTIME) && ap->userdata) |
| return xfs_bmap_rtalloc(ap); |
| return xfs_bmap_btalloc(ap); |
| } |
| |
| /* |
| * Transform a btree format file with only one leaf node, where the |
| * extents list will fit in the inode, into an extents format file. |
| * Since the file extents are already in-core, all we have to do is |
| * give up the space for the btree root and pitch the leaf block. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_btree_to_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_btree_cur_t *cur, /* btree cursor */ |
| int *logflagsp, /* inode logging flags */ |
| int whichfork) /* data or attr fork */ |
| { |
| /* REFERENCED */ |
| xfs_bmbt_block_t *cblock;/* child btree block */ |
| xfs_fsblock_t cbno; /* child block number */ |
| xfs_buf_t *cbp; /* child block's buffer */ |
| int error; /* error return value */ |
| xfs_ifork_t *ifp; /* inode fork data */ |
| xfs_mount_t *mp; /* mount point structure */ |
| __be64 *pp; /* ptr to block address */ |
| xfs_bmbt_block_t *rblock;/* root btree block */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); |
| rblock = ifp->if_broot; |
| ASSERT(be16_to_cpu(rblock->bb_level) == 1); |
| ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); |
| ASSERT(XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes) == 1); |
| mp = ip->i_mount; |
| pp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, ifp->if_broot_bytes); |
| cbno = be64_to_cpu(*pp); |
| *logflagsp = 0; |
| #ifdef DEBUG |
| if ((error = xfs_btree_check_lptr(cur, cbno, 1))) |
| return error; |
| #endif |
| if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, |
| XFS_BMAP_BTREE_REF))) |
| return error; |
| cblock = XFS_BUF_TO_BMBT_BLOCK(cbp); |
| if ((error = xfs_btree_check_lblock(cur, cblock, 0, cbp))) |
| return error; |
| xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp); |
| ip->i_d.di_nblocks--; |
| XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
| xfs_trans_binval(tp, cbp); |
| if (cur->bc_bufs[0] == cbp) |
| cur->bc_bufs[0] = NULL; |
| xfs_iroot_realloc(ip, -1, whichfork); |
| ASSERT(ifp->if_broot == NULL); |
| ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); |
| XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); |
| *logflagsp = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork); |
| return 0; |
| } |
| |
| /* |
| * Called by xfs_bmapi to update file extent records and the btree |
| * after removing space (or undoing a delayed allocation). |
| */ |
| STATIC int /* error */ |
| xfs_bmap_del_extent( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_trans_t *tp, /* current transaction pointer */ |
| xfs_extnum_t idx, /* extent number to update/delete */ |
| xfs_bmap_free_t *flist, /* list of extents to be freed */ |
| xfs_btree_cur_t *cur, /* if null, not a btree */ |
| xfs_bmbt_irec_t *del, /* data to remove from extents */ |
| int *logflagsp, /* inode logging flags */ |
| xfs_extdelta_t *delta, /* Change made to incore extents */ |
| int whichfork, /* data or attr fork */ |
| int rsvd) /* OK to allocate reserved blocks */ |
| { |
| xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ |
| xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ |
| xfs_fsblock_t del_endblock=0; /* first block past del */ |
| xfs_fileoff_t del_endoff; /* first offset past del */ |
| int delay; /* current block is delayed allocated */ |
| int do_fx; /* free extent at end of routine */ |
| xfs_bmbt_rec_t *ep; /* current extent entry pointer */ |
| int error; /* error return value */ |
| int flags; /* inode logging flags */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_del_extent"; |
| #endif |
| xfs_bmbt_irec_t got; /* current extent entry */ |
| xfs_fileoff_t got_endoff; /* first offset past got */ |
| int i; /* temp state */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_mount_t *mp; /* mount structure */ |
| xfs_filblks_t nblks; /* quota/sb block count */ |
| xfs_bmbt_irec_t new; /* new record to be inserted */ |
| /* REFERENCED */ |
| uint qfield; /* quota field to update */ |
| xfs_filblks_t temp; /* for indirect length calculations */ |
| xfs_filblks_t temp2; /* for indirect length calculations */ |
| |
| XFS_STATS_INC(xs_del_exlist); |
| mp = ip->i_mount; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT((idx >= 0) && (idx < ifp->if_bytes / |
| (uint)sizeof(xfs_bmbt_rec_t))); |
| ASSERT(del->br_blockcount > 0); |
| ep = xfs_iext_get_ext(ifp, idx); |
| xfs_bmbt_get_all(ep, &got); |
| ASSERT(got.br_startoff <= del->br_startoff); |
| del_endoff = del->br_startoff + del->br_blockcount; |
| got_endoff = got.br_startoff + got.br_blockcount; |
| ASSERT(got_endoff >= del_endoff); |
| delay = ISNULLSTARTBLOCK(got.br_startblock); |
| ASSERT(ISNULLSTARTBLOCK(del->br_startblock) == delay); |
| flags = 0; |
| qfield = 0; |
| error = 0; |
| /* |
| * If deleting a real allocation, must free up the disk space. |
| */ |
| if (!delay) { |
| flags = XFS_ILOG_CORE; |
| /* |
| * Realtime allocation. Free it and record di_nblocks update. |
| */ |
| if (whichfork == XFS_DATA_FORK && |
| (ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) { |
| xfs_fsblock_t bno; |
| xfs_filblks_t len; |
| |
| ASSERT(do_mod(del->br_blockcount, |
| mp->m_sb.sb_rextsize) == 0); |
| ASSERT(do_mod(del->br_startblock, |
| mp->m_sb.sb_rextsize) == 0); |
| bno = del->br_startblock; |
| len = del->br_blockcount; |
| do_div(bno, mp->m_sb.sb_rextsize); |
| do_div(len, mp->m_sb.sb_rextsize); |
| if ((error = xfs_rtfree_extent(ip->i_transp, bno, |
| (xfs_extlen_t)len))) |
| goto done; |
| do_fx = 0; |
| nblks = len * mp->m_sb.sb_rextsize; |
| qfield = XFS_TRANS_DQ_RTBCOUNT; |
| } |
| /* |
| * Ordinary allocation. |
| */ |
| else { |
| do_fx = 1; |
| nblks = del->br_blockcount; |
| qfield = XFS_TRANS_DQ_BCOUNT; |
| } |
| /* |
| * Set up del_endblock and cur for later. |
| */ |
| del_endblock = del->br_startblock + del->br_blockcount; |
| if (cur) { |
| if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, |
| got.br_startblock, got.br_blockcount, |
| &i))) |
| goto done; |
| ASSERT(i == 1); |
| } |
| da_old = da_new = 0; |
| } else { |
| da_old = STARTBLOCKVAL(got.br_startblock); |
| da_new = 0; |
| nblks = 0; |
| do_fx = 0; |
| } |
| /* |
| * Set flag value to use in switch statement. |
| * Left-contig is 2, right-contig is 1. |
| */ |
| switch (((got.br_startoff == del->br_startoff) << 1) | |
| (got_endoff == del_endoff)) { |
| case 3: |
| /* |
| * Matches the whole extent. Delete the entry. |
| */ |
| xfs_bmap_trace_delete(fname, "3", ip, idx, 1, whichfork); |
| xfs_iext_remove(ifp, idx, 1); |
| ifp->if_lastex = idx; |
| if (delay) |
| break; |
| XFS_IFORK_NEXT_SET(ip, whichfork, |
| XFS_IFORK_NEXTENTS(ip, whichfork) - 1); |
| flags |= XFS_ILOG_CORE; |
| if (!cur) { |
| flags |= XFS_ILOG_FEXT(whichfork); |
| break; |
| } |
| if ((error = xfs_bmbt_delete(cur, &i))) |
| goto done; |
| ASSERT(i == 1); |
| break; |
| |
| case 2: |
| /* |
| * Deleting the first part of the extent. |
| */ |
| xfs_bmap_trace_pre_update(fname, "2", ip, idx, whichfork); |
| xfs_bmbt_set_startoff(ep, del_endoff); |
| temp = got.br_blockcount - del->br_blockcount; |
| xfs_bmbt_set_blockcount(ep, temp); |
| ifp->if_lastex = idx; |
| if (delay) { |
| temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), |
| da_old); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "2", ip, idx, |
| whichfork); |
| da_new = temp; |
| break; |
| } |
| xfs_bmbt_set_startblock(ep, del_endblock); |
| xfs_bmap_trace_post_update(fname, "2", ip, idx, whichfork); |
| if (!cur) { |
| flags |= XFS_ILOG_FEXT(whichfork); |
| break; |
| } |
| if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, |
| got.br_blockcount - del->br_blockcount, |
| got.br_state))) |
| goto done; |
| break; |
| |
| case 1: |
| /* |
| * Deleting the last part of the extent. |
| */ |
| temp = got.br_blockcount - del->br_blockcount; |
| xfs_bmap_trace_pre_update(fname, "1", ip, idx, whichfork); |
| xfs_bmbt_set_blockcount(ep, temp); |
| ifp->if_lastex = idx; |
| if (delay) { |
| temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), |
| da_old); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| xfs_bmap_trace_post_update(fname, "1", ip, idx, |
| whichfork); |
| da_new = temp; |
| break; |
| } |
| xfs_bmap_trace_post_update(fname, "1", ip, idx, whichfork); |
| if (!cur) { |
| flags |= XFS_ILOG_FEXT(whichfork); |
| break; |
| } |
| if ((error = xfs_bmbt_update(cur, got.br_startoff, |
| got.br_startblock, |
| got.br_blockcount - del->br_blockcount, |
| got.br_state))) |
| goto done; |
| break; |
| |
| case 0: |
| /* |
| * Deleting the middle of the extent. |
| */ |
| temp = del->br_startoff - got.br_startoff; |
| xfs_bmap_trace_pre_update(fname, "0", ip, idx, whichfork); |
| xfs_bmbt_set_blockcount(ep, temp); |
| new.br_startoff = del_endoff; |
| temp2 = got_endoff - del_endoff; |
| new.br_blockcount = temp2; |
| new.br_state = got.br_state; |
| if (!delay) { |
| new.br_startblock = del_endblock; |
| flags |= XFS_ILOG_CORE; |
| if (cur) { |
| if ((error = xfs_bmbt_update(cur, |
| got.br_startoff, |
| got.br_startblock, temp, |
| got.br_state))) |
| goto done; |
| if ((error = xfs_bmbt_increment(cur, 0, &i))) |
| goto done; |
| cur->bc_rec.b = new; |
| error = xfs_bmbt_insert(cur, &i); |
| if (error && error != ENOSPC) |
| goto done; |
| /* |
| * If get no-space back from btree insert, |
| * it tried a split, and we have a zero |
| * block reservation. |
| * Fix up our state and return the error. |
| */ |
| if (error == ENOSPC) { |
| /* |
| * Reset the cursor, don't trust |
| * it after any insert operation. |
| */ |
| if ((error = xfs_bmbt_lookup_eq(cur, |
| got.br_startoff, |
| got.br_startblock, |
| temp, &i))) |
| goto done; |
| ASSERT(i == 1); |
| /* |
| * Update the btree record back |
| * to the original value. |
| */ |
| if ((error = xfs_bmbt_update(cur, |
| got.br_startoff, |
| got.br_startblock, |
| got.br_blockcount, |
| got.br_state))) |
| goto done; |
| /* |
| * Reset the extent record back |
| * to the original value. |
| */ |
| xfs_bmbt_set_blockcount(ep, |
| got.br_blockcount); |
| flags = 0; |
| error = XFS_ERROR(ENOSPC); |
| goto done; |
| } |
| ASSERT(i == 1); |
| } else |
| flags |= XFS_ILOG_FEXT(whichfork); |
| XFS_IFORK_NEXT_SET(ip, whichfork, |
| XFS_IFORK_NEXTENTS(ip, whichfork) + 1); |
| } else { |
| ASSERT(whichfork == XFS_DATA_FORK); |
| temp = xfs_bmap_worst_indlen(ip, temp); |
| xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp)); |
| temp2 = xfs_bmap_worst_indlen(ip, temp2); |
| new.br_startblock = NULLSTARTBLOCK((int)temp2); |
| da_new = temp + temp2; |
| while (da_new > da_old) { |
| if (temp) { |
| temp--; |
| da_new--; |
| xfs_bmbt_set_startblock(ep, |
| NULLSTARTBLOCK((int)temp)); |
| } |
| if (da_new == da_old) |
| break; |
| if (temp2) { |
| temp2--; |
| da_new--; |
| new.br_startblock = |
| NULLSTARTBLOCK((int)temp2); |
| } |
| } |
| } |
| xfs_bmap_trace_post_update(fname, "0", ip, idx, whichfork); |
| xfs_bmap_trace_insert(fname, "0", ip, idx + 1, 1, &new, NULL, |
| whichfork); |
| xfs_iext_insert(ifp, idx + 1, 1, &new); |
| ifp->if_lastex = idx + 1; |
| break; |
| } |
| /* |
| * If we need to, add to list of extents to delete. |
| */ |
| if (do_fx) |
| xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist, |
| mp); |
| /* |
| * Adjust inode # blocks in the file. |
| */ |
| if (nblks) |
| ip->i_d.di_nblocks -= nblks; |
| /* |
| * Adjust quota data. |
| */ |
| if (qfield) |
| XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, qfield, (long)-nblks); |
| |
| /* |
| * Account for change in delayed indirect blocks. |
| * Nothing to do for disk quota accounting here. |
| */ |
| ASSERT(da_old >= da_new); |
| if (da_old > da_new) |
| xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, (int)(da_old - da_new), |
| rsvd); |
| if (delta) { |
| /* DELTA: report the original extent. */ |
| if (delta->xed_startoff > got.br_startoff) |
| delta->xed_startoff = got.br_startoff; |
| if (delta->xed_blockcount < got.br_startoff+got.br_blockcount) |
| delta->xed_blockcount = got.br_startoff + |
| got.br_blockcount; |
| } |
| done: |
| *logflagsp = flags; |
| return error; |
| } |
| |
| /* |
| * Remove the entry "free" from the free item list. Prev points to the |
| * previous entry, unless "free" is the head of the list. |
| */ |
| STATIC void |
| xfs_bmap_del_free( |
| xfs_bmap_free_t *flist, /* free item list header */ |
| xfs_bmap_free_item_t *prev, /* previous item on list, if any */ |
| xfs_bmap_free_item_t *free) /* list item to be freed */ |
| { |
| if (prev) |
| prev->xbfi_next = free->xbfi_next; |
| else |
| flist->xbf_first = free->xbfi_next; |
| flist->xbf_count--; |
| kmem_zone_free(xfs_bmap_free_item_zone, free); |
| } |
| |
| /* |
| * Convert an extents-format file into a btree-format file. |
| * The new file will have a root block (in the inode) and a single child block. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_extents_to_btree( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first-block-allocated */ |
| xfs_bmap_free_t *flist, /* blocks freed in xaction */ |
| xfs_btree_cur_t **curp, /* cursor returned to caller */ |
| int wasdel, /* converting a delayed alloc */ |
| int *logflagsp, /* inode logging flags */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_block_t *ablock; /* allocated (child) bt block */ |
| xfs_buf_t *abp; /* buffer for ablock */ |
| xfs_alloc_arg_t args; /* allocation arguments */ |
| xfs_bmbt_rec_t *arp; /* child record pointer */ |
| xfs_bmbt_block_t *block; /* btree root block */ |
| xfs_btree_cur_t *cur; /* bmap btree cursor */ |
| xfs_bmbt_rec_t *ep; /* extent record pointer */ |
| int error; /* error return value */ |
| xfs_extnum_t i, cnt; /* extent record index */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_key_t *kp; /* root block key pointer */ |
| xfs_mount_t *mp; /* mount structure */ |
| xfs_extnum_t nextents; /* number of file extents */ |
| xfs_bmbt_ptr_t *pp; /* root block address pointer */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); |
| ASSERT(ifp->if_ext_max == |
| XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); |
| /* |
| * Make space in the inode incore. |
| */ |
| xfs_iroot_realloc(ip, 1, whichfork); |
| ifp->if_flags |= XFS_IFBROOT; |
| /* |
| * Fill in the root. |
| */ |
| block = ifp->if_broot; |
| block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
| block->bb_level = cpu_to_be16(1); |
| block->bb_numrecs = cpu_to_be16(1); |
| block->bb_leftsib = cpu_to_be64(NULLDFSBNO); |
| block->bb_rightsib = cpu_to_be64(NULLDFSBNO); |
| /* |
| * Need a cursor. Can't allocate until bb_level is filled in. |
| */ |
| mp = ip->i_mount; |
| cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip, |
| whichfork); |
| cur->bc_private.b.firstblock = *firstblock; |
| cur->bc_private.b.flist = flist; |
| cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; |
| /* |
| * Convert to a btree with two levels, one record in root. |
| */ |
| XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); |
| args.tp = tp; |
| args.mp = mp; |
| args.firstblock = *firstblock; |
| if (*firstblock == NULLFSBLOCK) { |
| args.type = XFS_ALLOCTYPE_START_BNO; |
| args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); |
| } else if (flist->xbf_low) { |
| args.type = XFS_ALLOCTYPE_START_BNO; |
| args.fsbno = *firstblock; |
| } else { |
| args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| args.fsbno = *firstblock; |
| } |
| args.minlen = args.maxlen = args.prod = 1; |
| args.total = args.minleft = args.alignment = args.mod = args.isfl = |
| args.minalignslop = 0; |
| args.wasdel = wasdel; |
| *logflagsp = 0; |
| if ((error = xfs_alloc_vextent(&args))) { |
| xfs_iroot_realloc(ip, -1, whichfork); |
| xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); |
| return error; |
| } |
| /* |
| * Allocation can't fail, the space was reserved. |
| */ |
| ASSERT(args.fsbno != NULLFSBLOCK); |
| ASSERT(*firstblock == NULLFSBLOCK || |
| args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) || |
| (flist->xbf_low && |
| args.agno > XFS_FSB_TO_AGNO(mp, *firstblock))); |
| *firstblock = cur->bc_private.b.firstblock = args.fsbno; |
| cur->bc_private.b.allocated++; |
| ip->i_d.di_nblocks++; |
| XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); |
| abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); |
| /* |
| * Fill in the child block. |
| */ |
| ablock = XFS_BUF_TO_BMBT_BLOCK(abp); |
| ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
| ablock->bb_level = 0; |
| ablock->bb_leftsib = cpu_to_be64(NULLDFSBNO); |
| ablock->bb_rightsib = cpu_to_be64(NULLDFSBNO); |
| arp = XFS_BMAP_REC_IADDR(ablock, 1, cur); |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| for (cnt = i = 0; i < nextents; i++) { |
| ep = xfs_iext_get_ext(ifp, i); |
| if (!ISNULLSTARTBLOCK(xfs_bmbt_get_startblock(ep))) { |
| arp->l0 = INT_GET(ep->l0, ARCH_CONVERT); |
| arp->l1 = INT_GET(ep->l1, ARCH_CONVERT); |
| arp++; cnt++; |
| } |
| } |
| ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); |
| ablock->bb_numrecs = cpu_to_be16(cnt); |
| /* |
| * Fill in the root key and pointer. |
| */ |
| kp = XFS_BMAP_KEY_IADDR(block, 1, cur); |
| arp = XFS_BMAP_REC_IADDR(ablock, 1, cur); |
| INT_SET(kp->br_startoff, ARCH_CONVERT, xfs_bmbt_disk_get_startoff(arp)); |
| pp = XFS_BMAP_PTR_IADDR(block, 1, cur); |
| *pp = cpu_to_be64(args.fsbno); |
| /* |
| * Do all this logging at the end so that |
| * the root is at the right level. |
| */ |
| xfs_bmbt_log_block(cur, abp, XFS_BB_ALL_BITS); |
| xfs_bmbt_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); |
| ASSERT(*curp == NULL); |
| *curp = cur; |
| *logflagsp = XFS_ILOG_CORE | XFS_ILOG_FBROOT(whichfork); |
| return 0; |
| } |
| |
| /* |
| * Helper routine to reset inode di_forkoff field when switching |
| * attribute fork from local to extent format - we reset it where |
| * possible to make space available for inline data fork extents. |
| */ |
| STATIC void |
| xfs_bmap_forkoff_reset( |
| xfs_mount_t *mp, |
| xfs_inode_t *ip, |
| int whichfork) |
| { |
| if (whichfork == XFS_ATTR_FORK && |
| (ip->i_d.di_format != XFS_DINODE_FMT_DEV) && |
| (ip->i_d.di_format != XFS_DINODE_FMT_UUID) && |
| ((mp->m_attroffset >> 3) > ip->i_d.di_forkoff)) { |
| ip->i_d.di_forkoff = mp->m_attroffset >> 3; |
| ip->i_df.if_ext_max = XFS_IFORK_DSIZE(ip) / |
| (uint)sizeof(xfs_bmbt_rec_t); |
| ip->i_afp->if_ext_max = XFS_IFORK_ASIZE(ip) / |
| (uint)sizeof(xfs_bmbt_rec_t); |
| } |
| } |
| |
| /* |
| * Convert a local file to an extents file. |
| * This code is out of bounds for data forks of regular files, |
| * since the file data needs to get logged so things will stay consistent. |
| * (The bmap-level manipulations are ok, though). |
| */ |
| STATIC int /* error */ |
| xfs_bmap_local_to_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fsblock_t *firstblock, /* first block allocated in xaction */ |
| xfs_extlen_t total, /* total blocks needed by transaction */ |
| int *logflagsp, /* inode logging flags */ |
| int whichfork) /* data or attr fork */ |
| { |
| int error; /* error return value */ |
| int flags; /* logging flags returned */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_local_to_extents"; |
| #endif |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| |
| /* |
| * We don't want to deal with the case of keeping inode data inline yet. |
| * So sending the data fork of a regular inode is invalid. |
| */ |
| ASSERT(!((ip->i_d.di_mode & S_IFMT) == S_IFREG && |
| whichfork == XFS_DATA_FORK)); |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); |
| flags = 0; |
| error = 0; |
| if (ifp->if_bytes) { |
| xfs_alloc_arg_t args; /* allocation arguments */ |
| xfs_buf_t *bp; /* buffer for extent block */ |
| xfs_bmbt_rec_t *ep; /* extent record pointer */ |
| |
| args.tp = tp; |
| args.mp = ip->i_mount; |
| args.firstblock = *firstblock; |
| ASSERT((ifp->if_flags & |
| (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE); |
| /* |
| * Allocate a block. We know we need only one, since the |
| * file currently fits in an inode. |
| */ |
| if (*firstblock == NULLFSBLOCK) { |
| args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); |
| args.type = XFS_ALLOCTYPE_START_BNO; |
| } else { |
| args.fsbno = *firstblock; |
| args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| } |
| args.total = total; |
| args.mod = args.minleft = args.alignment = args.wasdel = |
| args.isfl = args.minalignslop = 0; |
| args.minlen = args.maxlen = args.prod = 1; |
| if ((error = xfs_alloc_vextent(&args))) |
| goto done; |
| /* |
| * Can't fail, the space was reserved. |
| */ |
| ASSERT(args.fsbno != NULLFSBLOCK); |
| ASSERT(args.len == 1); |
| *firstblock = args.fsbno; |
| bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); |
| memcpy((char *)XFS_BUF_PTR(bp), ifp->if_u1.if_data, |
| ifp->if_bytes); |
| xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1); |
| xfs_bmap_forkoff_reset(args.mp, ip, whichfork); |
| xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); |
| xfs_iext_add(ifp, 0, 1); |
| ep = xfs_iext_get_ext(ifp, 0); |
| xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); |
| xfs_bmap_trace_post_update(fname, "new", ip, 0, whichfork); |
| XFS_IFORK_NEXT_SET(ip, whichfork, 1); |
| ip->i_d.di_nblocks = 1; |
| XFS_TRANS_MOD_DQUOT_BYINO(args.mp, tp, ip, |
| XFS_TRANS_DQ_BCOUNT, 1L); |
| flags |= XFS_ILOG_FEXT(whichfork); |
| } else { |
| ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); |
| xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork); |
| } |
| ifp->if_flags &= ~XFS_IFINLINE; |
| ifp->if_flags |= XFS_IFEXTENTS; |
| XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); |
| flags |= XFS_ILOG_CORE; |
| done: |
| *logflagsp = flags; |
| return error; |
| } |
| |
| /* |
| * Search the extent records for the entry containing block bno. |
| * If bno lies in a hole, point to the next entry. If bno lies |
| * past eof, *eofp will be set, and *prevp will contain the last |
| * entry (null if none). Else, *lastxp will be set to the index |
| * of the found entry; *gotp will contain the entry. |
| */ |
| xfs_bmbt_rec_t * /* pointer to found extent entry */ |
| xfs_bmap_search_multi_extents( |
| xfs_ifork_t *ifp, /* inode fork pointer */ |
| xfs_fileoff_t bno, /* block number searched for */ |
| int *eofp, /* out: end of file found */ |
| xfs_extnum_t *lastxp, /* out: last extent index */ |
| xfs_bmbt_irec_t *gotp, /* out: extent entry found */ |
| xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ |
| { |
| xfs_bmbt_rec_t *ep; /* extent record pointer */ |
| xfs_extnum_t lastx; /* last extent index */ |
| |
| /* |
| * Initialize the extent entry structure to catch access to |
| * uninitialized br_startblock field. |
| */ |
| gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL; |
| gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL; |
| gotp->br_state = XFS_EXT_INVALID; |
| #if XFS_BIG_BLKNOS |
| gotp->br_startblock = 0xffffa5a5a5a5a5a5LL; |
| #else |
| gotp->br_startblock = 0xffffa5a5; |
| #endif |
| prevp->br_startoff = NULLFILEOFF; |
| |
| ep = xfs_iext_bno_to_ext(ifp, bno, &lastx); |
| if (lastx > 0) { |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp); |
| } |
| if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { |
| xfs_bmbt_get_all(ep, gotp); |
| *eofp = 0; |
| } else { |
| if (lastx > 0) { |
| *gotp = *prevp; |
| } |
| *eofp = 1; |
| ep = NULL; |
| } |
| *lastxp = lastx; |
| return ep; |
| } |
| |
| /* |
| * Search the extents list for the inode, for the extent containing bno. |
| * If bno lies in a hole, point to the next entry. If bno lies past eof, |
| * *eofp will be set, and *prevp will contain the last entry (null if none). |
| * Else, *lastxp will be set to the index of the found |
| * entry; *gotp will contain the entry. |
| */ |
| STATIC xfs_bmbt_rec_t * /* pointer to found extent entry */ |
| xfs_bmap_search_extents( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fileoff_t bno, /* block number searched for */ |
| int whichfork, /* data or attr fork */ |
| int *eofp, /* out: end of file found */ |
| xfs_extnum_t *lastxp, /* out: last extent index */ |
| xfs_bmbt_irec_t *gotp, /* out: extent entry found */ |
| xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ |
| { |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_rec_t *ep; /* extent record pointer */ |
| int rt; /* realtime flag */ |
| |
| XFS_STATS_INC(xs_look_exlist); |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| |
| ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp); |
| |
| rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
| if (unlikely(!rt && !gotp->br_startblock && (*lastxp != NULLEXTNUM))) { |
| cmn_err(CE_PANIC,"Access to block zero: fs: <%s> inode: %lld " |
| "start_block : %llx start_off : %llx blkcnt : %llx " |
| "extent-state : %x \n", |
| (ip->i_mount)->m_fsname, (long long)ip->i_ino, |
| (unsigned long long)gotp->br_startblock, |
| (unsigned long long)gotp->br_startoff, |
| (unsigned long long)gotp->br_blockcount, |
| gotp->br_state); |
| } |
| return ep; |
| } |
| |
| |
| #ifdef XFS_BMAP_TRACE |
| ktrace_t *xfs_bmap_trace_buf; |
| |
| /* |
| * Add a bmap trace buffer entry. Base routine for the others. |
| */ |
| STATIC void |
| xfs_bmap_trace_addentry( |
| int opcode, /* operation */ |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry(ies) */ |
| xfs_extnum_t cnt, /* count of entries, 1 or 2 */ |
| xfs_bmbt_rec_t *r1, /* first record */ |
| xfs_bmbt_rec_t *r2, /* second record or null */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t tr2; |
| |
| ASSERT(cnt == 1 || cnt == 2); |
| ASSERT(r1 != NULL); |
| if (cnt == 1) { |
| ASSERT(r2 == NULL); |
| r2 = &tr2; |
| memset(&tr2, 0, sizeof(tr2)); |
| } else |
| ASSERT(r2 != NULL); |
| ktrace_enter(xfs_bmap_trace_buf, |
| (void *)(__psint_t)(opcode | (whichfork << 16)), |
| (void *)fname, (void *)desc, (void *)ip, |
| (void *)(__psint_t)idx, |
| (void *)(__psint_t)cnt, |
| (void *)(__psunsigned_t)(ip->i_ino >> 32), |
| (void *)(__psunsigned_t)(unsigned)ip->i_ino, |
| (void *)(__psunsigned_t)(r1->l0 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r1->l0), |
| (void *)(__psunsigned_t)(r1->l1 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r1->l1), |
| (void *)(__psunsigned_t)(r2->l0 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r2->l0), |
| (void *)(__psunsigned_t)(r2->l1 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r2->l1) |
| ); |
| ASSERT(ip->i_xtrace); |
| ktrace_enter(ip->i_xtrace, |
| (void *)(__psint_t)(opcode | (whichfork << 16)), |
| (void *)fname, (void *)desc, (void *)ip, |
| (void *)(__psint_t)idx, |
| (void *)(__psint_t)cnt, |
| (void *)(__psunsigned_t)(ip->i_ino >> 32), |
| (void *)(__psunsigned_t)(unsigned)ip->i_ino, |
| (void *)(__psunsigned_t)(r1->l0 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r1->l0), |
| (void *)(__psunsigned_t)(r1->l1 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r1->l1), |
| (void *)(__psunsigned_t)(r2->l0 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r2->l0), |
| (void *)(__psunsigned_t)(r2->l1 >> 32), |
| (void *)(__psunsigned_t)(unsigned)(r2->l1) |
| ); |
| } |
| |
| /* |
| * Add bmap trace entry prior to a call to xfs_iext_remove. |
| */ |
| STATIC void |
| xfs_bmap_trace_delete( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry(entries) deleted */ |
| xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_DELETE, fname, desc, ip, idx, |
| cnt, xfs_iext_get_ext(ifp, idx), |
| cnt == 2 ? xfs_iext_get_ext(ifp, idx + 1) : NULL, |
| whichfork); |
| } |
| |
| /* |
| * Add bmap trace entry prior to a call to xfs_iext_insert, or |
| * reading in the extents list from the disk (in the btree). |
| */ |
| STATIC void |
| xfs_bmap_trace_insert( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry(entries) inserted */ |
| xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */ |
| xfs_bmbt_irec_t *r1, /* inserted record 1 */ |
| xfs_bmbt_irec_t *r2, /* inserted record 2 or null */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t tr1; /* compressed record 1 */ |
| xfs_bmbt_rec_t tr2; /* compressed record 2 if needed */ |
| |
| xfs_bmbt_set_all(&tr1, r1); |
| if (cnt == 2) { |
| ASSERT(r2 != NULL); |
| xfs_bmbt_set_all(&tr2, r2); |
| } else { |
| ASSERT(cnt == 1); |
| ASSERT(r2 == NULL); |
| } |
| xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_INSERT, fname, desc, ip, idx, |
| cnt, &tr1, cnt == 2 ? &tr2 : NULL, whichfork); |
| } |
| |
| /* |
| * Add bmap trace entry after updating an extent record in place. |
| */ |
| STATIC void |
| xfs_bmap_trace_post_update( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry updated */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_POST_UP, fname, desc, ip, idx, |
| 1, xfs_iext_get_ext(ifp, idx), NULL, whichfork); |
| } |
| |
| /* |
| * Add bmap trace entry prior to updating an extent record in place. |
| */ |
| STATIC void |
| xfs_bmap_trace_pre_update( |
| char *fname, /* function name */ |
| char *desc, /* operation description */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t idx, /* index of entry to be updated */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_PRE_UP, fname, desc, ip, idx, 1, |
| xfs_iext_get_ext(ifp, idx), NULL, whichfork); |
| } |
| #endif /* XFS_BMAP_TRACE */ |
| |
| /* |
| * Compute the worst-case number of indirect blocks that will be used |
| * for ip's delayed extent of length "len". |
| */ |
| STATIC xfs_filblks_t |
| xfs_bmap_worst_indlen( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_filblks_t len) /* delayed extent length */ |
| { |
| int level; /* btree level number */ |
| int maxrecs; /* maximum record count at this level */ |
| xfs_mount_t *mp; /* mount structure */ |
| xfs_filblks_t rval; /* return value */ |
| |
| mp = ip->i_mount; |
| maxrecs = mp->m_bmap_dmxr[0]; |
| for (level = 0, rval = 0; |
| level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); |
| level++) { |
| len += maxrecs - 1; |
| do_div(len, maxrecs); |
| rval += len; |
| if (len == 1) |
| return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - |
| level - 1; |
| if (level == 0) |
| maxrecs = mp->m_bmap_dmxr[1]; |
| } |
| return rval; |
| } |
| |
| #if defined(XFS_RW_TRACE) |
| STATIC void |
| xfs_bunmap_trace( |
| xfs_inode_t *ip, |
| xfs_fileoff_t bno, |
| xfs_filblks_t len, |
| int flags, |
| inst_t *ra) |
| { |
| if (ip->i_rwtrace == NULL) |
| return; |
| ktrace_enter(ip->i_rwtrace, |
| (void *)(__psint_t)XFS_BUNMAP, |
| (void *)ip, |
| (void *)(__psint_t)((ip->i_d.di_size >> 32) & 0xffffffff), |
| (void *)(__psint_t)(ip->i_d.di_size & 0xffffffff), |
| (void *)(__psint_t)(((xfs_dfiloff_t)bno >> 32) & 0xffffffff), |
| (void *)(__psint_t)((xfs_dfiloff_t)bno & 0xffffffff), |
| (void *)(__psint_t)len, |
| (void *)(__psint_t)flags, |
| (void *)(unsigned long)current_cpu(), |
| (void *)ra, |
| (void *)0, |
| (void *)0, |
| (void *)0, |
| (void *)0, |
| (void *)0, |
| (void *)0); |
| } |
| #endif |
| |
| /* |
| * Convert inode from non-attributed to attributed. |
| * Must not be in a transaction, ip must not be locked. |
| */ |
| int /* error code */ |
| xfs_bmap_add_attrfork( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| int size, /* space new attribute needs */ |
| int rsvd) /* xact may use reserved blks */ |
| { |
| xfs_fsblock_t firstblock; /* 1st block/ag allocated */ |
| xfs_bmap_free_t flist; /* freed extent records */ |
| xfs_mount_t *mp; /* mount structure */ |
| xfs_trans_t *tp; /* transaction pointer */ |
| unsigned long s; /* spinlock spl value */ |
| int blks; /* space reservation */ |
| int version = 1; /* superblock attr version */ |
| int committed; /* xaction was committed */ |
| int logflags; /* logging flags */ |
| int error; /* error return value */ |
| |
| ASSERT(XFS_IFORK_Q(ip) == 0); |
| ASSERT(ip->i_df.if_ext_max == |
| XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t)); |
| |
| mp = ip->i_mount; |
| ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); |
| tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK); |
| blks = XFS_ADDAFORK_SPACE_RES(mp); |
| if (rsvd) |
| tp->t_flags |= XFS_TRANS_RESERVE; |
| if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT))) |
| goto error0; |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, blks, 0, rsvd ? |
| XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : |
| XFS_QMOPT_RES_REGBLKS); |
| if (error) { |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES); |
| return error; |
| } |
| if (XFS_IFORK_Q(ip)) |
| goto error1; |
| if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { |
| /* |
| * For inodes coming from pre-6.2 filesystems. |
| */ |
| ASSERT(ip->i_d.di_aformat == 0); |
| ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; |
| } |
| ASSERT(ip->i_d.di_anextents == 0); |
| VN_HOLD(XFS_ITOV(ip)); |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| switch (ip->i_d.di_format) { |
| case XFS_DINODE_FMT_DEV: |
| ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; |
| break; |
| case XFS_DINODE_FMT_UUID: |
| ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; |
| break; |
| case XFS_DINODE_FMT_LOCAL: |
| case XFS_DINODE_FMT_EXTENTS: |
| case XFS_DINODE_FMT_BTREE: |
| ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); |
| if (!ip->i_d.di_forkoff) |
| ip->i_d.di_forkoff = mp->m_attroffset >> 3; |
| else if (mp->m_flags & XFS_MOUNT_ATTR2) |
| version = 2; |
| break; |
| default: |
| ASSERT(0); |
| error = XFS_ERROR(EINVAL); |
| goto error1; |
| } |
| ip->i_df.if_ext_max = |
| XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| ASSERT(ip->i_afp == NULL); |
| ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); |
| ip->i_afp->if_ext_max = |
| XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); |
| ip->i_afp->if_flags = XFS_IFEXTENTS; |
| logflags = 0; |
| XFS_BMAP_INIT(&flist, &firstblock); |
| switch (ip->i_d.di_format) { |
| case XFS_DINODE_FMT_LOCAL: |
| error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist, |
| &logflags); |
| break; |
| case XFS_DINODE_FMT_EXTENTS: |
| error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, |
| &flist, &logflags); |
| break; |
| case XFS_DINODE_FMT_BTREE: |
| error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist, |
| &logflags); |
| break; |
| default: |
| error = 0; |
| break; |
| } |
| if (logflags) |
| xfs_trans_log_inode(tp, ip, logflags); |
| if (error) |
| goto error2; |
| if (!XFS_SB_VERSION_HASATTR(&mp->m_sb) || |
| (!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2)) { |
| __int64_t sbfields = 0; |
| |
| s = XFS_SB_LOCK(mp); |
| if (!XFS_SB_VERSION_HASATTR(&mp->m_sb)) { |
| XFS_SB_VERSION_ADDATTR(&mp->m_sb); |
| sbfields |= XFS_SB_VERSIONNUM; |
| } |
| if (!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2) { |
| XFS_SB_VERSION_ADDATTR2(&mp->m_sb); |
| sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); |
| } |
| if (sbfields) { |
| XFS_SB_UNLOCK(mp, s); |
| xfs_mod_sb(tp, sbfields); |
| } else |
| XFS_SB_UNLOCK(mp, s); |
| } |
| if ((error = xfs_bmap_finish(&tp, &flist, firstblock, &committed))) |
| goto error2; |
| error = xfs_trans_commit(tp, XFS_TRANS_PERM_LOG_RES, NULL); |
| ASSERT(ip->i_df.if_ext_max == |
| XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t)); |
| return error; |
| error2: |
| xfs_bmap_cancel(&flist); |
| error1: |
| ASSERT(ismrlocked(&ip->i_lock,MR_UPDATE)); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| error0: |
| xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| ASSERT(ip->i_df.if_ext_max == |
| XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t)); |
| return error; |
| } |
| |
| /* |
| * Add the extent to the list of extents to be free at transaction end. |
| * The list is maintained sorted (by block number). |
| */ |
| /* ARGSUSED */ |
| void |
| xfs_bmap_add_free( |
| xfs_fsblock_t bno, /* fs block number of extent */ |
| xfs_filblks_t len, /* length of extent */ |
| xfs_bmap_free_t *flist, /* list of extents */ |
| xfs_mount_t *mp) /* mount point structure */ |
| { |
| xfs_bmap_free_item_t *cur; /* current (next) element */ |
| xfs_bmap_free_item_t *new; /* new element */ |
| xfs_bmap_free_item_t *prev; /* previous element */ |
| #ifdef DEBUG |
| xfs_agnumber_t agno; |
| xfs_agblock_t agbno; |
| |
| ASSERT(bno != NULLFSBLOCK); |
| ASSERT(len > 0); |
| ASSERT(len <= MAXEXTLEN); |
| ASSERT(!ISNULLSTARTBLOCK(bno)); |
| agno = XFS_FSB_TO_AGNO(mp, bno); |
| agbno = XFS_FSB_TO_AGBNO(mp, bno); |
| ASSERT(agno < mp->m_sb.sb_agcount); |
| ASSERT(agbno < mp->m_sb.sb_agblocks); |
| ASSERT(len < mp->m_sb.sb_agblocks); |
| ASSERT(agbno + len <= mp->m_sb.sb_agblocks); |
| #endif |
| ASSERT(xfs_bmap_free_item_zone != NULL); |
| new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); |
| new->xbfi_startblock = bno; |
| new->xbfi_blockcount = (xfs_extlen_t)len; |
| for (prev = NULL, cur = flist->xbf_first; |
| cur != NULL; |
| prev = cur, cur = cur->xbfi_next) { |
| if (cur->xbfi_startblock >= bno) |
| break; |
| } |
| if (prev) |
| prev->xbfi_next = new; |
| else |
| flist->xbf_first = new; |
| new->xbfi_next = cur; |
| flist->xbf_count++; |
| } |
| |
| /* |
| * Compute and fill in the value of the maximum depth of a bmap btree |
| * in this filesystem. Done once, during mount. |
| */ |
| void |
| xfs_bmap_compute_maxlevels( |
| xfs_mount_t *mp, /* file system mount structure */ |
| int whichfork) /* data or attr fork */ |
| { |
| int level; /* btree level */ |
| uint maxblocks; /* max blocks at this level */ |
| uint maxleafents; /* max leaf entries possible */ |
| int maxrootrecs; /* max records in root block */ |
| int minleafrecs; /* min records in leaf block */ |
| int minnoderecs; /* min records in node block */ |
| int sz; /* root block size */ |
| |
| /* |
| * The maximum number of extents in a file, hence the maximum |
| * number of leaf entries, is controlled by the type of di_nextents |
| * (a signed 32-bit number, xfs_extnum_t), or by di_anextents |
| * (a signed 16-bit number, xfs_aextnum_t). |
| */ |
| if (whichfork == XFS_DATA_FORK) { |
| maxleafents = MAXEXTNUM; |
| sz = (mp->m_flags & XFS_MOUNT_ATTR2) ? |
| XFS_BMDR_SPACE_CALC(MINDBTPTRS) : mp->m_attroffset; |
| } else { |
| maxleafents = MAXAEXTNUM; |
| sz = (mp->m_flags & XFS_MOUNT_ATTR2) ? |
| XFS_BMDR_SPACE_CALC(MINABTPTRS) : |
| mp->m_sb.sb_inodesize - mp->m_attroffset; |
| } |
| maxrootrecs = (int)XFS_BTREE_BLOCK_MAXRECS(sz, xfs_bmdr, 0); |
| minleafrecs = mp->m_bmap_dmnr[0]; |
| minnoderecs = mp->m_bmap_dmnr[1]; |
| maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; |
| for (level = 1; maxblocks > 1; level++) { |
| if (maxblocks <= maxrootrecs) |
| maxblocks = 1; |
| else |
| maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; |
| } |
| mp->m_bm_maxlevels[whichfork] = level; |
| } |
| |
| /* |
| * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi |
| * caller. Frees all the extents that need freeing, which must be done |
| * last due to locking considerations. We never free any extents in |
| * the first transaction. This is to allow the caller to make the first |
| * transaction a synchronous one so that the pointers to the data being |
| * broken in this transaction will be permanent before the data is actually |
| * freed. This is necessary to prevent blocks from being reallocated |
| * and written to before the free and reallocation are actually permanent. |
| * We do not just make the first transaction synchronous here, because |
| * there are more efficient ways to gain the same protection in some cases |
| * (see the file truncation code). |
| * |
| * Return 1 if the given transaction was committed and a new one |
| * started, and 0 otherwise in the committed parameter. |
| */ |
| /*ARGSUSED*/ |
| int /* error */ |
| xfs_bmap_finish( |
| xfs_trans_t **tp, /* transaction pointer addr */ |
| xfs_bmap_free_t *flist, /* i/o: list extents to free */ |
| xfs_fsblock_t firstblock, /* controlled ag for allocs */ |
| int *committed) /* xact committed or not */ |
| { |
| xfs_efd_log_item_t *efd; /* extent free data */ |
| xfs_efi_log_item_t *efi; /* extent free intention */ |
| int error; /* error return value */ |
| xfs_bmap_free_item_t *free; /* free extent item */ |
| unsigned int logres; /* new log reservation */ |
| unsigned int logcount; /* new log count */ |
| xfs_mount_t *mp; /* filesystem mount structure */ |
| xfs_bmap_free_item_t *next; /* next item on free list */ |
| xfs_trans_t *ntp; /* new transaction pointer */ |
| |
| ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES); |
| if (flist->xbf_count == 0) { |
| *committed = 0; |
| return 0; |
| } |
| ntp = *tp; |
| efi = xfs_trans_get_efi(ntp, flist->xbf_count); |
| for (free = flist->xbf_first; free; free = free->xbfi_next) |
| xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock, |
| free->xbfi_blockcount); |
| logres = ntp->t_log_res; |
| logcount = ntp->t_log_count; |
| ntp = xfs_trans_dup(*tp); |
| error = xfs_trans_commit(*tp, 0, NULL); |
| *tp = ntp; |
| *committed = 1; |
| /* |
| * We have a new transaction, so we should return committed=1, |
| * even though we're returning an error. |
| */ |
| if (error) { |
| return error; |
| } |
| if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES, |
| logcount))) |
| return error; |
| efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count); |
| for (free = flist->xbf_first; free != NULL; free = next) { |
| next = free->xbfi_next; |
| if ((error = xfs_free_extent(ntp, free->xbfi_startblock, |
| free->xbfi_blockcount))) { |
| /* |
| * The bmap free list will be cleaned up at a |
| * higher level. The EFI will be canceled when |
| * this transaction is aborted. |
| * Need to force shutdown here to make sure it |
| * happens, since this transaction may not be |
| * dirty yet. |
| */ |
| mp = ntp->t_mountp; |
| if (!XFS_FORCED_SHUTDOWN(mp)) |
| xfs_force_shutdown(mp, |
| (error == EFSCORRUPTED) ? |
| SHUTDOWN_CORRUPT_INCORE : |
| SHUTDOWN_META_IO_ERROR); |
| return error; |
| } |
| xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock, |
| free->xbfi_blockcount); |
| xfs_bmap_del_free(flist, NULL, free); |
| } |
| return 0; |
| } |
| |
| /* |
| * Free up any items left in the list. |
| */ |
| void |
| xfs_bmap_cancel( |
| xfs_bmap_free_t *flist) /* list of bmap_free_items */ |
| { |
| xfs_bmap_free_item_t *free; /* free list item */ |
| xfs_bmap_free_item_t *next; |
| |
| if (flist->xbf_count == 0) |
| return; |
| ASSERT(flist->xbf_first != NULL); |
| for (free = flist->xbf_first; free; free = next) { |
| next = free->xbfi_next; |
| xfs_bmap_del_free(flist, NULL, free); |
| } |
| ASSERT(flist->xbf_count == 0); |
| } |
| |
| /* |
| * Returns the file-relative block number of the first unused block(s) |
| * in the file with at least "len" logically contiguous blocks free. |
| * This is the lowest-address hole if the file has holes, else the first block |
| * past the end of file. |
| * Return 0 if the file is currently local (in-inode). |
| */ |
| int /* error */ |
| xfs_bmap_first_unused( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| xfs_extlen_t len, /* size of hole to find */ |
| xfs_fileoff_t *first_unused, /* unused block */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t *ep; /* pointer to an extent entry */ |
| int error; /* error return value */ |
| int idx; /* extent record index */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_fileoff_t lastaddr; /* last block number seen */ |
| xfs_fileoff_t lowest; /* lowest useful block */ |
| xfs_fileoff_t max; /* starting useful block */ |
| xfs_fileoff_t off; /* offset for this block */ |
| xfs_extnum_t nextents; /* number of extent entries */ |
| |
| ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || |
| XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || |
| XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
| *first_unused = 0; |
| return 0; |
| } |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(tp, ip, whichfork))) |
| return error; |
| lowest = *first_unused; |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { |
| ep = xfs_iext_get_ext(ifp, idx); |
| off = xfs_bmbt_get_startoff(ep); |
| /* |
| * See if the hole before this extent will work. |
| */ |
| if (off >= lowest + len && off - max >= len) { |
| *first_unused = max; |
| return 0; |
| } |
| lastaddr = off + xfs_bmbt_get_blockcount(ep); |
| max = XFS_FILEOFF_MAX(lastaddr, lowest); |
| } |
| *first_unused = max; |
| return 0; |
| } |
| |
| /* |
| * Returns the file-relative block number of the last block + 1 before |
| * last_block (input value) in the file. |
| * This is not based on i_size, it is based on the extent records. |
| * Returns 0 for local files, as they do not have extent records. |
| */ |
| int /* error */ |
| xfs_bmap_last_before( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| xfs_fileoff_t *last_block, /* last block */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_fileoff_t bno; /* input file offset */ |
| int eof; /* hit end of file */ |
| xfs_bmbt_rec_t *ep; /* pointer to last extent */ |
| int error; /* error return value */ |
| xfs_bmbt_irec_t got; /* current extent value */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_extnum_t lastx; /* last extent used */ |
| xfs_bmbt_irec_t prev; /* previous extent value */ |
| |
| if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) |
| return XFS_ERROR(EIO); |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
| *last_block = 0; |
| return 0; |
| } |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(tp, ip, whichfork))) |
| return error; |
| bno = *last_block - 1; |
| ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, |
| &prev); |
| if (eof || xfs_bmbt_get_startoff(ep) > bno) { |
| if (prev.br_startoff == NULLFILEOFF) |
| *last_block = 0; |
| else |
| *last_block = prev.br_startoff + prev.br_blockcount; |
| } |
| /* |
| * Otherwise *last_block is already the right answer. |
| */ |
| return 0; |
| } |
| |
| /* |
| * Returns the file-relative block number of the first block past eof in |
| * the file. This is not based on i_size, it is based on the extent records. |
| * Returns 0 for local files, as they do not have extent records. |
| */ |
| int /* error */ |
| xfs_bmap_last_offset( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| xfs_fileoff_t *last_block, /* last block */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t *ep; /* pointer to last extent */ |
| int error; /* error return value */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_extnum_t nextents; /* number of extent entries */ |
| |
| if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) |
| return XFS_ERROR(EIO); |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
| *last_block = 0; |
| return 0; |
| } |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(tp, ip, whichfork))) |
| return error; |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| if (!nextents) { |
| *last_block = 0; |
| return 0; |
| } |
| ep = xfs_iext_get_ext(ifp, nextents - 1); |
| *last_block = xfs_bmbt_get_startoff(ep) + xfs_bmbt_get_blockcount(ep); |
| return 0; |
| } |
| |
| /* |
| * Returns whether the selected fork of the inode has exactly one |
| * block or not. For the data fork we check this matches di_size, |
| * implying the file's range is 0..bsize-1. |
| */ |
| int /* 1=>1 block, 0=>otherwise */ |
| xfs_bmap_one_block( |
| xfs_inode_t *ip, /* incore inode */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t *ep; /* ptr to fork's extent */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| int rval; /* return value */ |
| xfs_bmbt_irec_t s; /* internal version of extent */ |
| |
| #ifndef DEBUG |
| if (whichfork == XFS_DATA_FORK) |
| return ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize; |
| #endif /* !DEBUG */ |
| if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) |
| return 0; |
| if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) |
| return 0; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| ep = xfs_iext_get_ext(ifp, 0); |
| xfs_bmbt_get_all(ep, &s); |
| rval = s.br_startoff == 0 && s.br_blockcount == 1; |
| if (rval && whichfork == XFS_DATA_FORK) |
| ASSERT(ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize); |
| return rval; |
| } |
| |
| /* |
| * Read in the extents to if_extents. |
| * All inode fields are set up by caller, we just traverse the btree |
| * and copy the records in. If the file system cannot contain unwritten |
| * extents, the records are checked for no "state" flags. |
| */ |
| int /* error */ |
| xfs_bmap_read_extents( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_block_t *block; /* current btree block */ |
| xfs_fsblock_t bno; /* block # of "block" */ |
| xfs_buf_t *bp; /* buffer for "block" */ |
| int error; /* error return value */ |
| xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ |
| #ifdef XFS_BMAP_TRACE |
| static char fname[] = "xfs_bmap_read_extents"; |
| #endif |
| xfs_extnum_t i, j; /* index into the extents list */ |
| xfs_ifork_t *ifp; /* fork structure */ |
| int level; /* btree level, for checking */ |
| xfs_mount_t *mp; /* file system mount structure */ |
| __be64 *pp; /* pointer to block address */ |
| /* REFERENCED */ |
| xfs_extnum_t room; /* number of entries there's room for */ |
| |
| bno = NULLFSBLOCK; |
| mp = ip->i_mount; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : |
| XFS_EXTFMT_INODE(ip); |
| block = ifp->if_broot; |
| /* |
| * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
| */ |
| level = be16_to_cpu(block->bb_level); |
| ASSERT(level > 0); |
| pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes); |
| bno = be64_to_cpu(*pp); |
| ASSERT(bno != NULLDFSBNO); |
| ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
| ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); |
| /* |
| * Go down the tree until leaf level is reached, following the first |
| * pointer (leftmost) at each level. |
| */ |
| while (level-- > 0) { |
| if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, |
| XFS_BMAP_BTREE_REF))) |
| return error; |
| block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| XFS_WANT_CORRUPTED_GOTO( |
| XFS_BMAP_SANITY_CHECK(mp, block, level), |
| error0); |
| if (level == 0) |
| break; |
| pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, block, |
| 1, mp->m_bmap_dmxr[1]); |
| bno = be64_to_cpu(*pp); |
| XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0); |
| xfs_trans_brelse(tp, bp); |
| } |
| /* |
| * Here with bp and block set to the leftmost leaf node in the tree. |
| */ |
| room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| i = 0; |
| /* |
| * Loop over all leaf nodes. Copy information to the extent records. |
| */ |
| for (;;) { |
| xfs_bmbt_rec_t *frp, *trp; |
| xfs_fsblock_t nextbno; |
| xfs_extnum_t num_recs; |
| xfs_extnum_t start; |
| |
| |
| num_recs = be16_to_cpu(block->bb_numrecs); |
| if (unlikely(i + num_recs > room)) { |
| ASSERT(i + num_recs <= room); |
| xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
| "corrupt dinode %Lu, (btree extents).", |
| (unsigned long long) ip->i_ino); |
| XFS_ERROR_REPORT("xfs_bmap_read_extents(1)", |
| XFS_ERRLEVEL_LOW, |
| ip->i_mount); |
| goto error0; |
| } |
| XFS_WANT_CORRUPTED_GOTO( |
| XFS_BMAP_SANITY_CHECK(mp, block, 0), |
| error0); |
| /* |
| * Read-ahead the next leaf block, if any. |
| */ |
| nextbno = be64_to_cpu(block->bb_rightsib); |
| if (nextbno != NULLFSBLOCK) |
| xfs_btree_reada_bufl(mp, nextbno, 1); |
| /* |
| * Copy records into the extent records. |
| */ |
| frp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, |
| block, 1, mp->m_bmap_dmxr[0]); |
| start = i; |
| for (j = 0; j < num_recs; j++, i++, frp++) { |
| trp = xfs_iext_get_ext(ifp, i); |
| trp->l0 = INT_GET(frp->l0, ARCH_CONVERT); |
| trp->l1 = INT_GET(frp->l1, ARCH_CONVERT); |
| } |
| if (exntf == XFS_EXTFMT_NOSTATE) { |
| /* |
| * Check all attribute bmap btree records and |
| * any "older" data bmap btree records for a |
| * set bit in the "extent flag" position. |
| */ |
| if (unlikely(xfs_check_nostate_extents(ifp, |
| start, num_recs))) { |
| XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", |
| XFS_ERRLEVEL_LOW, |
| ip->i_mount); |
| goto error0; |
| } |
| } |
| xfs_trans_brelse(tp, bp); |
| bno = nextbno; |
| /* |
| * If we've reached the end, stop. |
| */ |
| if (bno == NULLFSBLOCK) |
| break; |
| if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, |
| XFS_BMAP_BTREE_REF))) |
| return error; |
| block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| } |
| ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
| ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork)); |
| xfs_bmap_trace_exlist(fname, ip, i, whichfork); |
| return 0; |
| error0: |
| xfs_trans_brelse(tp, bp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| |
| #ifdef XFS_BMAP_TRACE |
| /* |
| * Add bmap trace insert entries for all the contents of the extent records. |
| */ |
| void |
| xfs_bmap_trace_exlist( |
| char *fname, /* function name */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_extnum_t cnt, /* count of entries in the list */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t *ep; /* current extent record */ |
| xfs_extnum_t idx; /* extent record index */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_irec_t s; /* file extent record */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
| for (idx = 0; idx < cnt; idx++) { |
| ep = xfs_iext_get_ext(ifp, idx); |
| xfs_bmbt_get_all(ep, &s); |
| xfs_bmap_trace_insert(fname, "exlist", ip, idx, 1, &s, NULL, |
| whichfork); |
| } |
| } |
| #endif |
| |
| #ifdef DEBUG |
| /* |
| * Validate that the bmbt_irecs being returned from bmapi are valid |
| * given the callers original parameters. Specifically check the |
| * ranges of the returned irecs to ensure that they only extent beyond |
| * the given parameters if the XFS_BMAPI_ENTIRE flag was set. |
| */ |
| STATIC void |
| xfs_bmap_validate_ret( |
| xfs_fileoff_t bno, |
| xfs_filblks_t len, |
| int flags, |
| xfs_bmbt_irec_t *mval, |
| int nmap, |
| int ret_nmap) |
| { |
| int i; /* index to map values */ |
| |
| ASSERT(ret_nmap <= nmap); |
| |
| for (i = 0; i < ret_nmap; i++) { |
| ASSERT(mval[i].br_blockcount > 0); |
| if (!(flags & XFS_BMAPI_ENTIRE)) { |
| ASSERT(mval[i].br_startoff >= bno); |
| ASSERT(mval[i].br_blockcount <= len); |
| ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= |
| bno + len); |
| } else { |
| ASSERT(mval[i].br_startoff < bno + len); |
| ASSERT(mval[i].br_startoff + mval[i].br_blockcount > |
| bno); |
| } |
| ASSERT(i == 0 || |
| mval[i - 1].br_startoff + mval[i - 1].br_blockcount == |
| mval[i].br_startoff); |
| if ((flags & XFS_BMAPI_WRITE) && !(flags & XFS_BMAPI_DELAY)) |
| ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && |
| mval[i].br_startblock != HOLESTARTBLOCK); |
| ASSERT(mval[i].br_state == XFS_EXT_NORM || |
| mval[i].br_state == XFS_EXT_UNWRITTEN); |
| } |
| } |
| #endif /* DEBUG */ |
| |
| |
| /* |
| * Map file blocks to filesystem blocks. |
| * File range is given by the bno/len pair. |
| * Adds blocks to file if a write ("flags & XFS_BMAPI_WRITE" set) |
| * into a hole or past eof. |
| * Only allocates blocks from a single allocation group, |
| * to avoid locking problems. |
| * The returned value in "firstblock" from the first call in a transaction |
| * must be remembered and presented to subsequent calls in "firstblock". |
| * An upper bound for the number of blocks to be allocated is supplied to |
| * the first call in "total"; if no allocation group has that many free |
| * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). |
| */ |
| int /* error */ |
| xfs_bmapi( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| xfs_fileoff_t bno, /* starting file offs. mapped */ |
| xfs_filblks_t len, /* length to map in file */ |
| int flags, /* XFS_BMAPI_... */ |
| xfs_fsblock_t *firstblock, /* first allocated block |
| controls a.g. for allocs */ |
| xfs_extlen_t total, /* total blocks needed */ |
| xfs_bmbt_irec_t *mval, /* output: map values */ |
| int *nmap, /* i/o: mval size/count */ |
| xfs_bmap_free_t *flist, /* i/o: list extents to free */ |
| xfs_extdelta_t *delta) /* o: change made to incore extents */ |
| { |
| xfs_fsblock_t abno; /* allocated block number */ |
| xfs_extlen_t alen; /* allocated extent length */ |
| xfs_fileoff_t aoff; /* allocated file offset */ |
| xfs_bmalloca_t bma; /* args for xfs_bmap_alloc */ |
| xfs_btree_cur_t *cur; /* bmap btree cursor */ |
| xfs_fileoff_t end; /* end of mapped file region */ |
| int eof; /* we've hit the end of extents */ |
| xfs_bmbt_rec_t *ep; /* extent record pointer */ |
| int error; /* error return */ |
| xfs_bmbt_irec_t got; /* current file extent record */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_extlen_t indlen; /* indirect blocks length */ |
| xfs_extnum_t lastx; /* last useful extent number */ |
| int logflags; /* flags for transaction logging */ |
| xfs_extlen_t minleft; /* min blocks left after allocation */ |
| xfs_extlen_t minlen; /* min allocation size */ |
| xfs_mount_t *mp; /* xfs mount structure */ |
| int n; /* current extent index */ |
| int nallocs; /* number of extents alloc\'d */ |
| xfs_extnum_t nextents; /* number of extents in file */ |
| xfs_fileoff_t obno; /* old block number (offset) */ |
| xfs_bmbt_irec_t prev; /* previous file extent record */ |
| int tmp_logflags; /* temp flags holder */ |
| int whichfork; /* data or attr fork */ |
| char inhole; /* current location is hole in file */ |
| char wasdelay; /* old extent was delayed */ |
| char wr; /* this is a write request */ |
| char rt; /* this is a realtime file */ |
| #ifdef DEBUG |
| xfs_fileoff_t orig_bno; /* original block number value */ |
| int orig_flags; /* original flags arg value */ |
| xfs_filblks_t orig_len; /* original value of len arg */ |
| xfs_bmbt_irec_t *orig_mval; /* original value of mval */ |
| int orig_nmap; /* original value of *nmap */ |
| |
| orig_bno = bno; |
| orig_len = len; |
| orig_flags = flags; |
| orig_mval = mval; |
| orig_nmap = *nmap; |
| #endif |
| ASSERT(*nmap >= 1); |
| ASSERT(*nmap <= XFS_BMAP_MAX_NMAP || !(flags & XFS_BMAPI_WRITE)); |
| whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
| XFS_ATTR_FORK : XFS_DATA_FORK; |
| mp = ip->i_mount; |
| if (unlikely(XFS_TEST_ERROR( |
| (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL), |
| mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
| XFS_ERROR_REPORT("xfs_bmapi", XFS_ERRLEVEL_LOW, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(ifp->if_ext_max == |
| XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); |
| if ((wr = (flags & XFS_BMAPI_WRITE)) != 0) |
| XFS_STATS_INC(xs_blk_mapw); |
| else |
| XFS_STATS_INC(xs_blk_mapr); |
| /* |
| * IGSTATE flag is used to combine extents which |
| * differ only due to the state of the extents. |
| * This technique is used from xfs_getbmap() |
| * when the caller does not wish to see the |
| * separation (which is the default). |
| * |
| * This technique is also used when writing a |
| * buffer which has been partially written, |
| * (usually by being flushed during a chunkread), |
| * to ensure one write takes place. This also |
| * prevents a change in the xfs inode extents at |
| * this time, intentionally. This change occurs |
| * on completion of the write operation, in |
| * xfs_strat_comp(), where the xfs_bmapi() call |
| * is transactioned, and the extents combined. |
| */ |
| if ((flags & XFS_BMAPI_IGSTATE) && wr) /* if writing unwritten space */ |
| wr = 0; /* no allocations are allowed */ |
| ASSERT(wr || !(flags & XFS_BMAPI_DELAY)); |
| logflags = 0; |
| nallocs = 0; |
| cur = NULL; |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
| ASSERT(wr && tp); |
| if ((error = xfs_bmap_local_to_extents(tp, ip, |
| firstblock, total, &logflags, whichfork))) |
| goto error0; |
| } |
| if (wr && *firstblock == NULLFSBLOCK) { |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) |
| minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; |
| else |
| minleft = 1; |
| } else |
| minleft = 0; |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(tp, ip, whichfork))) |
| goto error0; |
| ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, |
| &prev); |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| n = 0; |
| end = bno + len; |
| obno = bno; |
| bma.ip = NULL; |
| if (delta) { |
| delta->xed_startoff = NULLFILEOFF; |
| delta->xed_blockcount = 0; |
| } |
| while (bno < end && n < *nmap) { |
| /* |
| * Reading past eof, act as though there's a hole |
| * up to end. |
| */ |
| if (eof && !wr) |
| got.br_startoff = end; |
| inhole = eof || got.br_startoff > bno; |
| wasdelay = wr && !inhole && !(flags & XFS_BMAPI_DELAY) && |
| ISNULLSTARTBLOCK(got.br_startblock); |
| /* |
| * First, deal with the hole before the allocated space |
| * that we found, if any. |
| */ |
| if (wr && (inhole || wasdelay)) { |
| /* |
| * For the wasdelay case, we could also just |
| * allocate the stuff asked for in this bmap call |
| * but that wouldn't be as good. |
| */ |
| if (wasdelay && !(flags & XFS_BMAPI_EXACT)) { |
| alen = (xfs_extlen_t)got.br_blockcount; |
| aoff = got.br_startoff; |
| if (lastx != NULLEXTNUM && lastx) { |
| ep = xfs_iext_get_ext(ifp, lastx - 1); |
| xfs_bmbt_get_all(ep, &prev); |
| } |
| } else if (wasdelay) { |
| alen = (xfs_extlen_t) |
| XFS_FILBLKS_MIN(len, |
| (got.br_startoff + |
| got.br_blockcount) - bno); |
| aoff = bno; |
| } else { |
| alen = (xfs_extlen_t) |
| XFS_FILBLKS_MIN(len, MAXEXTLEN); |
| if (!eof) |
| alen = (xfs_extlen_t) |
| XFS_FILBLKS_MIN(alen, |
| got.br_startoff - bno); |
| aoff = bno; |
| } |
| minlen = (flags & XFS_BMAPI_CONTIG) ? alen : 1; |
| if (flags & XFS_BMAPI_DELAY) { |
| xfs_extlen_t extsz; |
| |
| /* Figure out the extent size, adjust alen */ |
| if (rt) { |
| if (!(extsz = ip->i_d.di_extsize)) |
| extsz = mp->m_sb.sb_rextsize; |
| } else { |
| extsz = ip->i_d.di_extsize; |
| } |
| if (extsz) { |
| error = xfs_bmap_extsize_align(mp, |
| &got, &prev, extsz, |
| rt, eof, |
| flags&XFS_BMAPI_DELAY, |
| flags&XFS_BMAPI_CONVERT, |
| &aoff, &alen); |
| ASSERT(!error); |
| } |
| |
| if (rt) |
| extsz = alen / mp->m_sb.sb_rextsize; |
| |
| /* |
| * Make a transaction-less quota reservation for |
| * delayed allocation blocks. This number gets |
| * adjusted later. We return if we haven't |
| * allocated blocks already inside this loop. |
| */ |
| if ((error = XFS_TRANS_RESERVE_QUOTA_NBLKS( |
| mp, NULL, ip, (long)alen, 0, |
| rt ? XFS_QMOPT_RES_RTBLKS : |
| XFS_QMOPT_RES_REGBLKS))) { |
| if (n == 0) { |
| *nmap = 0; |
| ASSERT(cur == NULL); |
| return error; |
| } |
| break; |
| } |
| |
| /* |
| * Split changing sb for alen and indlen since |
| * they could be coming from different places. |
| */ |
| indlen = (xfs_extlen_t) |
| xfs_bmap_worst_indlen(ip, alen); |
| ASSERT(indlen > 0); |
| |
| if (rt) { |
| error = xfs_mod_incore_sb(mp, |
| XFS_SBS_FREXTENTS, |
| -(extsz), (flags & |
| XFS_BMAPI_RSVBLOCKS)); |
| } else { |
| error = xfs_mod_incore_sb(mp, |
| XFS_SBS_FDBLOCKS, |
| -(alen), (flags & |
| XFS_BMAPI_RSVBLOCKS)); |
| } |
| if (!error) { |
| error = xfs_mod_incore_sb(mp, |
| XFS_SBS_FDBLOCKS, |
| -(indlen), (flags & |
| XFS_BMAPI_RSVBLOCKS)); |
| if (error && rt) |
| xfs_mod_incore_sb(mp, |
| XFS_SBS_FREXTENTS, |
| extsz, (flags & |
| XFS_BMAPI_RSVBLOCKS)); |
| else if (error) |
| xfs_mod_incore_sb(mp, |
| XFS_SBS_FDBLOCKS, |
| alen, (flags & |
| XFS_BMAPI_RSVBLOCKS)); |
| } |
| |
| if (error) { |
| if (XFS_IS_QUOTA_ON(mp)) |
| /* unreserve the blocks now */ |
| (void) |
| XFS_TRANS_UNRESERVE_QUOTA_NBLKS( |
| mp, NULL, ip, |
| (long)alen, 0, rt ? |
| XFS_QMOPT_RES_RTBLKS : |
| XFS_QMOPT_RES_REGBLKS); |
| break; |
| } |
| |
| ip->i_delayed_blks += alen; |
| abno = NULLSTARTBLOCK(indlen); |
| } else { |
| /* |
| * If first time, allocate and fill in |
| * once-only bma fields. |
| */ |
| if (bma.ip == NULL) { |
| bma.tp = tp; |
| bma.ip = ip; |
| bma.prevp = &prev; |
| bma.gotp = &got; |
| bma.total = total; |
| bma.userdata = 0; |
| } |
| /* Indicate if this is the first user data |
| * in the file, or just any user data. |
| */ |
| if (!(flags & XFS_BMAPI_METADATA)) { |
| bma.userdata = (aoff == 0) ? |
| XFS_ALLOC_INITIAL_USER_DATA : |
| XFS_ALLOC_USERDATA; |
| } |
| /* |
| * Fill in changeable bma fields. |
| */ |
| bma.eof = eof; |
| bma.firstblock = *firstblock; |
| bma.alen = alen; |
| bma.off = aoff; |
| bma.conv = !!(flags & XFS_BMAPI_CONVERT); |
| bma.wasdel = wasdelay; |
| bma.minlen = minlen; |
| bma.low = flist->xbf_low; |
| bma.minleft = minleft; |
| /* |
| * Only want to do the alignment at the |
| * eof if it is userdata and allocation length |
| * is larger than a stripe unit. |
| */ |
| if (mp->m_dalign && alen >= mp->m_dalign && |
| (!(flags & XFS_BMAPI_METADATA)) && |
| (whichfork == XFS_DATA_FORK)) { |
| if ((error = xfs_bmap_isaeof(ip, aoff, |
| whichfork, &bma.aeof))) |
| goto error0; |
| } else |
| bma.aeof = 0; |
| /* |
| * Call allocator. |
| */ |
| if ((error = xfs_bmap_alloc(&bma))) |
| goto error0; |
| /* |
| * Copy out result fields. |
| */ |
| abno = bma.rval; |
| if ((flist->xbf_low = bma.low)) |
| minleft = 0; |
| alen = bma.alen; |
| aoff = bma.off; |
| ASSERT(*firstblock == NULLFSBLOCK || |
| XFS_FSB_TO_AGNO(mp, *firstblock) == |
| XFS_FSB_TO_AGNO(mp, bma.firstblock) || |
| (flist->xbf_low && |
| XFS_FSB_TO_AGNO(mp, *firstblock) < |
| XFS_FSB_TO_AGNO(mp, bma.firstblock))); |
| *firstblock = bma.firstblock; |
| if (cur) |
| cur->bc_private.b.firstblock = |
| *firstblock; |
| if (abno == NULLFSBLOCK) |
| break; |
| if ((ifp->if_flags & XFS_IFBROOT) && !cur) { |
| cur = xfs_btree_init_cursor(mp, |
| tp, NULL, 0, XFS_BTNUM_BMAP, |
| ip, whichfork); |
| cur->bc_private.b.firstblock = |
| *firstblock; |
| cur->bc_private.b.flist = flist; |
| } |
| /* |
| * Bump the number of extents we've allocated |
| * in this call. |
| */ |
| nallocs++; |
| } |
| if (cur) |
| cur->bc_private.b.flags = |
| wasdelay ? XFS_BTCUR_BPRV_WASDEL : 0; |
| got.br_startoff = aoff; |
| got.br_startblock = abno; |
| got.br_blockcount = alen; |
| got.br_state = XFS_EXT_NORM; /* assume normal */ |
| /* |
| * Determine state of extent, and the filesystem. |
| * A wasdelay extent has been initialized, so |
| * shouldn't be flagged as unwritten. |
| */ |
| if (wr && XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) { |
| if (!wasdelay && (flags & XFS_BMAPI_PREALLOC)) |
| got.br_state = XFS_EXT_UNWRITTEN; |
| } |
| error = xfs_bmap_add_extent(ip, lastx, &cur, &got, |
| firstblock, flist, &tmp_logflags, delta, |
| whichfork, (flags & XFS_BMAPI_RSVBLOCKS)); |
| logflags |= tmp_logflags; |
| if (error) |
| goto error0; |
| lastx = ifp->if_lastex; |
| ep = xfs_iext_get_ext(ifp, lastx); |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| xfs_bmbt_get_all(ep, &got); |
| ASSERT(got.br_startoff <= aoff); |
| ASSERT(got.br_startoff + got.br_blockcount >= |
| aoff + alen); |
| #ifdef DEBUG |
| if (flags & XFS_BMAPI_DELAY) { |
| ASSERT(ISNULLSTARTBLOCK(got.br_startblock)); |
| ASSERT(STARTBLOCKVAL(got.br_startblock) > 0); |
| } |
| ASSERT(got.br_state == XFS_EXT_NORM || |
| got.br_state == XFS_EXT_UNWRITTEN); |
| #endif |
| /* |
| * Fall down into the found allocated space case. |
| */ |
| } else if (inhole) { |
| /* |
| * Reading in a hole. |
| */ |
| mval->br_startoff = bno; |
| mval->br_startblock = HOLESTARTBLOCK; |
| mval->br_blockcount = |
| XFS_FILBLKS_MIN(len, got.br_startoff - bno); |
| mval->br_state = XFS_EXT_NORM; |
| bno += mval->br_blockcount; |
| len -= mval->br_blockcount; |
| mval++; |
| n++; |
| continue; |
| } |
| /* |
| * Then deal with the allocated space we found. |
| */ |
| ASSERT(ep != NULL); |
| if (!(flags & XFS_BMAPI_ENTIRE) && |
| (got.br_startoff + got.br_blockcount > obno)) { |
| if (obno > bno) |
| bno = obno; |
| ASSERT((bno >= obno) || (n == 0)); |
| ASSERT(bno < end); |
| mval->br_startoff = bno; |
| if (ISNULLSTARTBLOCK(got.br_startblock)) { |
| ASSERT(!wr || (flags & XFS_BMAPI_DELAY)); |
| mval->br_startblock = DELAYSTARTBLOCK; |
| } else |
| mval->br_startblock = |
| got.br_startblock + |
| (bno - got.br_startoff); |
| /* |
| * Return the minimum of what we got and what we |
| * asked for for the length. We can use the len |
| * variable here because it is modified below |
| * and we could have been there before coming |
| * here if the first part of the allocation |
| * didn't overlap what was asked for. |
| */ |
| mval->br_blockcount = |
| XFS_FILBLKS_MIN(end - bno, got.br_blockcount - |
| (bno - got.br_startoff)); |
| mval->br_state = got.br_state; |
| ASSERT(mval->br_blockcount <= len); |
| } else { |
| *mval = got; |
| if (ISNULLSTARTBLOCK(mval->br_startblock)) { |
| ASSERT(!wr || (flags & XFS_BMAPI_DELAY)); |
| mval->br_startblock = DELAYSTARTBLOCK; |
| } |
| } |
| |
| /* |
| * Check if writing previously allocated but |
| * unwritten extents. |
| */ |
| if (wr && mval->br_state == XFS_EXT_UNWRITTEN && |
| ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_DELAY)) == 0)) { |
| /* |
| * Modify (by adding) the state flag, if writing. |
| */ |
| ASSERT(mval->br_blockcount <= len); |
| if ((ifp->if_flags & XFS_IFBROOT) && !cur) { |
| cur = xfs_btree_init_cursor(mp, |
| tp, NULL, 0, XFS_BTNUM_BMAP, |
| ip, whichfork); |
| cur->bc_private.b.firstblock = |
| *firstblock; |
| cur->bc_private.b.flist = flist; |
| } |
| mval->br_state = XFS_EXT_NORM; |
| error = xfs_bmap_add_extent(ip, lastx, &cur, mval, |
| firstblock, flist, &tmp_logflags, delta, |
| whichfork, (flags & XFS_BMAPI_RSVBLOCKS)); |
| logflags |= tmp_logflags; |
| if (error) |
| goto error0; |
| lastx = ifp->if_lastex; |
| ep = xfs_iext_get_ext(ifp, lastx); |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| xfs_bmbt_get_all(ep, &got); |
| /* |
| * We may have combined previously unwritten |
| * space with written space, so generate |
| * another request. |
| */ |
| if (mval->br_blockcount < len) |
| continue; |
| } |
| |
| ASSERT((flags & XFS_BMAPI_ENTIRE) || |
| ((mval->br_startoff + mval->br_blockcount) <= end)); |
| ASSERT((flags & XFS_BMAPI_ENTIRE) || |
| (mval->br_blockcount <= len) || |
| (mval->br_startoff < obno)); |
| bno = mval->br_startoff + mval->br_blockcount; |
| len = end - bno; |
| if (n > 0 && mval->br_startoff == mval[-1].br_startoff) { |
| ASSERT(mval->br_startblock == mval[-1].br_startblock); |
| ASSERT(mval->br_blockcount > mval[-1].br_blockcount); |
| ASSERT(mval->br_state == mval[-1].br_state); |
| mval[-1].br_blockcount = mval->br_blockcount; |
| mval[-1].br_state = mval->br_state; |
| } else if (n > 0 && mval->br_startblock != DELAYSTARTBLOCK && |
| mval[-1].br_startblock != DELAYSTARTBLOCK && |
| mval[-1].br_startblock != HOLESTARTBLOCK && |
| mval->br_startblock == |
| mval[-1].br_startblock + mval[-1].br_blockcount && |
| ((flags & XFS_BMAPI_IGSTATE) || |
| mval[-1].br_state == mval->br_state)) { |
| ASSERT(mval->br_startoff == |
| mval[-1].br_startoff + mval[-1].br_blockcount); |
| mval[-1].br_blockcount += mval->br_blockcount; |
| } else if (n > 0 && |
| mval->br_startblock == DELAYSTARTBLOCK && |
| mval[-1].br_startblock == DELAYSTARTBLOCK && |
| mval->br_startoff == |
| mval[-1].br_startoff + mval[-1].br_blockcount) { |
| mval[-1].br_blockcount += mval->br_blockcount; |
| mval[-1].br_state = mval->br_state; |
| } else if (!((n == 0) && |
| ((mval->br_startoff + mval->br_blockcount) <= |
| obno))) { |
| mval++; |
| n++; |
| } |
| /* |
| * If we're done, stop now. Stop when we've allocated |
| * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise |
| * the transaction may get too big. |
| */ |
| if (bno >= end || n >= *nmap || nallocs >= *nmap) |
| break; |
| /* |
| * Else go on to the next record. |
| */ |
| ep = xfs_iext_get_ext(ifp, ++lastx); |
| if (lastx >= nextents) { |
| eof = 1; |
| prev = got; |
| } else |
| xfs_bmbt_get_all(ep, &got); |
| } |
| ifp->if_lastex = lastx; |
| *nmap = n; |
| /* |
| * Transform from btree to extents, give it cur. |
| */ |
| if (tp && XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && |
| XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) { |
| ASSERT(wr && cur); |
| error = xfs_bmap_btree_to_extents(tp, ip, cur, |
| &tmp_logflags, whichfork); |
| logflags |= tmp_logflags; |
| if (error) |
| goto error0; |
| } |
| ASSERT(ifp->if_ext_max == |
| XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); |
| ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || |
| XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max); |
| error = 0; |
| if (delta && delta->xed_startoff != NULLFILEOFF) { |
| /* A change was actually made. |
| * Note that delta->xed_blockount is an offset at this |
| * point and needs to be converted to a block count. |
| */ |
| ASSERT(delta->xed_blockcount > delta->xed_startoff); |
| delta->xed_blockcount -= delta->xed_startoff; |
| } |
| error0: |
| /* |
| * Log everything. Do this after conversion, there's no point in |
| * logging the extent records if we've converted to btree format. |
| */ |
| if ((logflags & XFS_ILOG_FEXT(whichfork)) && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) |
| logflags &= ~XFS_ILOG_FEXT(whichfork); |
| else if ((logflags & XFS_ILOG_FBROOT(whichfork)) && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) |
| logflags &= ~XFS_ILOG_FBROOT(whichfork); |
| /* |
| * Log whatever the flags say, even if error. Otherwise we might miss |
| * detecting a case where the data is changed, there's an error, |
| * and it's not logged so we don't shutdown when we should. |
| */ |
| if (logflags) { |
| ASSERT(tp && wr); |
| xfs_trans_log_inode(tp, ip, logflags); |
| } |
| if (cur) { |
| if (!error) { |
| ASSERT(*firstblock == NULLFSBLOCK || |
| XFS_FSB_TO_AGNO(mp, *firstblock) == |
| XFS_FSB_TO_AGNO(mp, |
| cur->bc_private.b.firstblock) || |
| (flist->xbf_low && |
| XFS_FSB_TO_AGNO(mp, *firstblock) < |
| XFS_FSB_TO_AGNO(mp, |
| cur->bc_private.b.firstblock))); |
| *firstblock = cur->bc_private.b.firstblock; |
| } |
| xfs_btree_del_cursor(cur, |
| error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
| } |
| if (!error) |
| xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, |
| orig_nmap, *nmap); |
| return error; |
| } |
| |
| /* |
| * Map file blocks to filesystem blocks, simple version. |
| * One block (extent) only, read-only. |
| * For flags, only the XFS_BMAPI_ATTRFORK flag is examined. |
| * For the other flag values, the effect is as if XFS_BMAPI_METADATA |
| * was set and all the others were clear. |
| */ |
| int /* error */ |
| xfs_bmapi_single( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| int whichfork, /* data or attr fork */ |
| xfs_fsblock_t *fsb, /* output: mapped block */ |
| xfs_fileoff_t bno) /* starting file offs. mapped */ |
| { |
| int eof; /* we've hit the end of extents */ |
| int error; /* error return */ |
| xfs_bmbt_irec_t got; /* current file extent record */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_extnum_t lastx; /* last useful extent number */ |
| xfs_bmbt_irec_t prev; /* previous file extent record */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (unlikely( |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)) { |
| XFS_ERROR_REPORT("xfs_bmapi_single", XFS_ERRLEVEL_LOW, |
| ip->i_mount); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| return XFS_ERROR(EIO); |
| XFS_STATS_INC(xs_blk_mapr); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(tp, ip, whichfork))) |
| return error; |
| (void)xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, |
| &prev); |
| /* |
| * Reading past eof, act as though there's a hole |
| * up to end. |
| */ |
| if (eof || got.br_startoff > bno) { |
| *fsb = NULLFSBLOCK; |
| return 0; |
| } |
| ASSERT(!ISNULLSTARTBLOCK(got.br_startblock)); |
| ASSERT(bno < got.br_startoff + got.br_blockcount); |
| *fsb = got.br_startblock + (bno - got.br_startoff); |
| ifp->if_lastex = lastx; |
| return 0; |
| } |
| |
| /* |
| * Unmap (remove) blocks from a file. |
| * If nexts is nonzero then the number of extents to remove is limited to |
| * that value. If not all extents in the block range can be removed then |
| * *done is set. |
| */ |
| int /* error */ |
| xfs_bunmapi( |
| xfs_trans_t *tp, /* transaction pointer */ |
| struct xfs_inode *ip, /* incore inode */ |
| xfs_fileoff_t bno, /* starting offset to unmap */ |
| xfs_filblks_t len, /* length to unmap in file */ |
| int flags, /* misc flags */ |
| xfs_extnum_t nexts, /* number of extents max */ |
| xfs_fsblock_t *firstblock, /* first allocated block |
| controls a.g. for allocs */ |
| xfs_bmap_free_t *flist, /* i/o: list extents to free */ |
| xfs_extdelta_t *delta, /* o: change made to incore |
| extents */ |
| int *done) /* set if not done yet */ |
| { |
| xfs_btree_cur_t *cur; /* bmap btree cursor */ |
| xfs_bmbt_irec_t del; /* extent being deleted */ |
| int eof; /* is deleting at eof */ |
| xfs_bmbt_rec_t *ep; /* extent record pointer */ |
| int error; /* error return value */ |
| xfs_extnum_t extno; /* extent number in list */ |
| xfs_bmbt_irec_t got; /* current extent record */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| int isrt; /* freeing in rt area */ |
| xfs_extnum_t lastx; /* last extent index used */ |
| int logflags; /* transaction logging flags */ |
| xfs_extlen_t mod; /* rt extent offset */ |
| xfs_mount_t *mp; /* mount structure */ |
| xfs_extnum_t nextents; /* number of file extents */ |
| xfs_bmbt_irec_t prev; /* previous extent record */ |
| xfs_fileoff_t start; /* first file offset deleted */ |
| int tmp_logflags; /* partial logging flags */ |
| int wasdel; /* was a delayed alloc extent */ |
| int whichfork; /* data or attribute fork */ |
| int rsvd; /* OK to allocate reserved blocks */ |
| xfs_fsblock_t sum; |
| |
| xfs_bunmap_trace(ip, bno, len, flags, (inst_t *)__return_address); |
| whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
| XFS_ATTR_FORK : XFS_DATA_FORK; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (unlikely( |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { |
| XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, |
| ip->i_mount); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| mp = ip->i_mount; |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| rsvd = (flags & XFS_BMAPI_RSVBLOCKS) != 0; |
| ASSERT(len > 0); |
| ASSERT(nexts >= 0); |
| ASSERT(ifp->if_ext_max == |
| XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(tp, ip, whichfork))) |
| return error; |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| if (nextents == 0) { |
| *done = 1; |
| return 0; |
| } |
| XFS_STATS_INC(xs_blk_unmap); |
| isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
| start = bno; |
| bno = start + len - 1; |
| ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, |
| &prev); |
| if (delta) { |
| delta->xed_startoff = NULLFILEOFF; |
| delta->xed_blockcount = 0; |
| } |
| /* |
| * Check to see if the given block number is past the end of the |
| * file, back up to the last block if so... |
| */ |
| if (eof) { |
| ep = xfs_iext_get_ext(ifp, --lastx); |
| xfs_bmbt_get_all(ep, &got); |
| bno = got.br_startoff + got.br_blockcount - 1; |
| } |
| logflags = 0; |
| if (ifp->if_flags & XFS_IFBROOT) { |
| ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); |
| cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip, |
| whichfork); |
| cur->bc_private.b.firstblock = *firstblock; |
| cur->bc_private.b.flist = flist; |
| cur->bc_private.b.flags = 0; |
| } else |
| cur = NULL; |
| extno = 0; |
| while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && |
| (nexts == 0 || extno < nexts)) { |
| /* |
| * Is the found extent after a hole in which bno lives? |
| * Just back up to the previous extent, if so. |
| */ |
| if (got.br_startoff > bno) { |
| if (--lastx < 0) |
| break; |
| ep = xfs_iext_get_ext(ifp, lastx); |
| xfs_bmbt_get_all(ep, &got); |
| } |
| /* |
| * Is the last block of this extent before the range |
| * we're supposed to delete? If so, we're done. |
| */ |
| bno = XFS_FILEOFF_MIN(bno, |
| got.br_startoff + got.br_blockcount - 1); |
| if (bno < start) |
| break; |
| /* |
| * Then deal with the (possibly delayed) allocated space |
| * we found. |
| */ |
| ASSERT(ep != NULL); |
| del = got; |
| wasdel = ISNULLSTARTBLOCK(del.br_startblock); |
| if (got.br_startoff < start) { |
| del.br_startoff = start; |
| del.br_blockcount -= start - got.br_startoff; |
| if (!wasdel) |
| del.br_startblock += start - got.br_startoff; |
| } |
| if (del.br_startoff + del.br_blockcount > bno + 1) |
| del.br_blockcount = bno + 1 - del.br_startoff; |
| sum = del.br_startblock + del.br_blockcount; |
| if (isrt && |
| (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { |
| /* |
| * Realtime extent not lined up at the end. |
| * The extent could have been split into written |
| * and unwritten pieces, or we could just be |
| * unmapping part of it. But we can't really |
| * get rid of part of a realtime extent. |
| */ |
| if (del.br_state == XFS_EXT_UNWRITTEN || |
| !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) { |
| /* |
| * This piece is unwritten, or we're not |
| * using unwritten extents. Skip over it. |
| */ |
| ASSERT(bno >= mod); |
| bno -= mod > del.br_blockcount ? |
| del.br_blockcount : mod; |
| if (bno < got.br_startoff) { |
| if (--lastx >= 0) |
| xfs_bmbt_get_all(xfs_iext_get_ext( |
| ifp, lastx), &got); |
| } |
| continue; |
| } |
| /* |
| * It's written, turn it unwritten. |
| * This is better than zeroing it. |
| */ |
| ASSERT(del.br_state == XFS_EXT_NORM); |
| ASSERT(xfs_trans_get_block_res(tp) > 0); |
| /* |
| * If this spans a realtime extent boundary, |
| * chop it back to the start of the one we end at. |
| */ |
| if (del.br_blockcount > mod) { |
| del.br_startoff += del.br_blockcount - mod; |
| del.br_startblock += del.br_blockcount - mod; |
| del.br_blockcount = mod; |
| } |
| del.br_state = XFS_EXT_UNWRITTEN; |
| error = xfs_bmap_add_extent(ip, lastx, &cur, &del, |
| firstblock, flist, &logflags, delta, |
| XFS_DATA_FORK, 0); |
| if (error) |
| goto error0; |
| goto nodelete; |
| } |
| if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { |
| /* |
| * Realtime extent is lined up at the end but not |
| * at the front. We'll get rid of full extents if |
| * we can. |
| */ |
| mod = mp->m_sb.sb_rextsize - mod; |
| if (del.br_blockcount > mod) { |
| del.br_blockcount -= mod; |
| del.br_startoff += mod; |
| del.br_startblock += mod; |
| } else if ((del.br_startoff == start && |
| (del.br_state == XFS_EXT_UNWRITTEN || |
| xfs_trans_get_block_res(tp) == 0)) || |
| !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) { |
| /* |
| * Can't make it unwritten. There isn't |
| * a full extent here so just skip it. |
| */ |
| ASSERT(bno >= del.br_blockcount); |
| bno -= del.br_blockcount; |
| if (bno < got.br_startoff) { |
| if (--lastx >= 0) |
| xfs_bmbt_get_all(--ep, &got); |
| } |
| continue; |
| } else if (del.br_state == XFS_EXT_UNWRITTEN) { |
| /* |
| * This one is already unwritten. |
| * It must have a written left neighbor. |
| * Unwrite the killed part of that one and |
| * try again. |
| */ |
| ASSERT(lastx > 0); |
| xfs_bmbt_get_all(xfs_iext_get_ext(ifp, |
| lastx - 1), &prev); |
| ASSERT(prev.br_state == XFS_EXT_NORM); |
| ASSERT(!ISNULLSTARTBLOCK(prev.br_startblock)); |
| ASSERT(del.br_startblock == |
| prev.br_startblock + prev.br_blockcount); |
| if (prev.br_startoff < start) { |
| mod = start - prev.br_startoff; |
| prev.br_blockcount -= mod; |
| prev.br_startblock += mod; |
| prev.br_startoff = start; |
| } |
| prev.br_state = XFS_EXT_UNWRITTEN; |
| error = xfs_bmap_add_extent(ip, lastx - 1, &cur, |
| &prev, firstblock, flist, &logflags, |
| delta, XFS_DATA_FORK, 0); |
| if (error) |
| goto error0; |
| goto nodelete; |
| } else { |
| ASSERT(del.br_state == XFS_EXT_NORM); |
| del.br_state = XFS_EXT_UNWRITTEN; |
| error = xfs_bmap_add_extent(ip, lastx, &cur, |
| &del, firstblock, flist, &logflags, |
| delta, XFS_DATA_FORK, 0); |
| if (error) |
| goto error0; |
| goto nodelete; |
| } |
| } |
| if (wasdel) { |
| ASSERT(STARTBLOCKVAL(del.br_startblock) > 0); |
| /* Update realtime/data freespace, unreserve quota */ |
| if (isrt) { |
| xfs_filblks_t rtexts; |
| |
| rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); |
| do_div(rtexts, mp->m_sb.sb_rextsize); |
| xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, |
| (int)rtexts, rsvd); |
| (void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, |
| NULL, ip, -((long)del.br_blockcount), 0, |
| XFS_QMOPT_RES_RTBLKS); |
| } else { |
| xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, |
| (int)del.br_blockcount, rsvd); |
| (void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, |
| NULL, ip, -((long)del.br_blockcount), 0, |
| XFS_QMOPT_RES_REGBLKS); |
| } |
| ip->i_delayed_blks -= del.br_blockcount; |
| if (cur) |
| cur->bc_private.b.flags |= |
| XFS_BTCUR_BPRV_WASDEL; |
| } else if (cur) |
| cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; |
| /* |
| * If it's the case where the directory code is running |
| * with no block reservation, and the deleted block is in |
| * the middle of its extent, and the resulting insert |
| * of an extent would cause transformation to btree format, |
| * then reject it. The calling code will then swap |
| * blocks around instead. |
| * We have to do this now, rather than waiting for the |
| * conversion to btree format, since the transaction |
| * will be dirty. |
| */ |
| if (!wasdel && xfs_trans_get_block_res(tp) == 0 && |
| XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_NEXTENTS(ip, whichfork) >= ifp->if_ext_max && |
| del.br_startoff > got.br_startoff && |
| del.br_startoff + del.br_blockcount < |
| got.br_startoff + got.br_blockcount) { |
| error = XFS_ERROR(ENOSPC); |
| goto error0; |
| } |
| error = xfs_bmap_del_extent(ip, tp, lastx, flist, cur, &del, |
| &tmp_logflags, delta, whichfork, rsvd); |
| logflags |= tmp_logflags; |
| if (error) |
| goto error0; |
| bno = del.br_startoff - 1; |
| nodelete: |
| lastx = ifp->if_lastex; |
| /* |
| * If not done go on to the next (previous) record. |
| * Reset ep in case the extents array was re-alloced. |
| */ |
| ep = xfs_iext_get_ext(ifp, lastx); |
| if (bno != (xfs_fileoff_t)-1 && bno >= start) { |
| if (lastx >= XFS_IFORK_NEXTENTS(ip, whichfork) || |
| xfs_bmbt_get_startoff(ep) > bno) { |
| if (--lastx >= 0) |
| ep = xfs_iext_get_ext(ifp, lastx); |
| } |
| if (lastx >= 0) |
| xfs_bmbt_get_all(ep, &got); |
| extno++; |
| } |
| } |
| ifp->if_lastex = lastx; |
| *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0; |
| ASSERT(ifp->if_ext_max == |
| XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); |
| /* |
| * Convert to a btree if necessary. |
| */ |
| if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && |
| XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) { |
| ASSERT(cur == NULL); |
| error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, |
| &cur, 0, &tmp_logflags, whichfork); |
| logflags |= tmp_logflags; |
| if (error) |
| goto error0; |
| } |
| /* |
| * transform from btree to extents, give it cur |
| */ |
| else if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && |
| XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) { |
| ASSERT(cur != NULL); |
| error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, |
| whichfork); |
| logflags |= tmp_logflags; |
| if (error) |
| goto error0; |
| } |
| /* |
| * transform from extents to local? |
| */ |
| ASSERT(ifp->if_ext_max == |
| XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); |
| error = 0; |
| if (delta && delta->xed_startoff != NULLFILEOFF) { |
| /* A change was actually made. |
| * Note that delta->xed_blockount is an offset at this |
| * point and needs to be converted to a block count. |
| */ |
| ASSERT(delta->xed_blockcount > delta->xed_startoff); |
| delta->xed_blockcount -= delta->xed_startoff; |
| } |
| error0: |
| /* |
| * Log everything. Do this after conversion, there's no point in |
| * logging the extent records if we've converted to btree format. |
| */ |
| if ((logflags & XFS_ILOG_FEXT(whichfork)) && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) |
| logflags &= ~XFS_ILOG_FEXT(whichfork); |
| else if ((logflags & XFS_ILOG_FBROOT(whichfork)) && |
| XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) |
| logflags &= ~XFS_ILOG_FBROOT(whichfork); |
| /* |
| * Log inode even in the error case, if the transaction |
| * is dirty we'll need to shut down the filesystem. |
| */ |
| if (logflags) |
| xfs_trans_log_inode(tp, ip, logflags); |
| if (cur) { |
| if (!error) { |
| *firstblock = cur->bc_private.b.firstblock; |
| cur->bc_private.b.allocated = 0; |
| } |
| xfs_btree_del_cursor(cur, |
| error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); |
| } |
| return error; |
| } |
| |
| /* |
| * Fcntl interface to xfs_bmapi. |
| */ |
| int /* error code */ |
| xfs_getbmap( |
| bhv_desc_t *bdp, /* XFS behavior descriptor*/ |
| struct getbmap *bmv, /* user bmap structure */ |
| void __user *ap, /* pointer to user's array */ |
| int interface) /* interface flags */ |
| { |
| __int64_t bmvend; /* last block requested */ |
| int error; /* return value */ |
| __int64_t fixlen; /* length for -1 case */ |
| int i; /* extent number */ |
| xfs_inode_t *ip; /* xfs incore inode pointer */ |
| bhv_vnode_t *vp; /* corresponding vnode */ |
| int lock; /* lock state */ |
| xfs_bmbt_irec_t *map; /* buffer for user's data */ |
| xfs_mount_t *mp; /* file system mount point */ |
| int nex; /* # of user extents can do */ |
| int nexleft; /* # of user extents left */ |
| int subnex; /* # of bmapi's can do */ |
| int nmap; /* number of map entries */ |
| struct getbmap out; /* output structure */ |
| int whichfork; /* data or attr fork */ |
| int prealloced; /* this is a file with |
| * preallocated data space */ |
| int sh_unwritten; /* true, if unwritten */ |
| /* extents listed separately */ |
| int bmapi_flags; /* flags for xfs_bmapi */ |
| __int32_t oflags; /* getbmapx bmv_oflags field */ |
| |
| vp = BHV_TO_VNODE(bdp); |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| whichfork = interface & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK; |
| sh_unwritten = (interface & BMV_IF_PREALLOC) != 0; |
| |
| /* If the BMV_IF_NO_DMAPI_READ interface bit specified, do not |
| * generate a DMAPI read event. Otherwise, if the DM_EVENT_READ |
| * bit is set for the file, generate a read event in order |
| * that the DMAPI application may do its thing before we return |
| * the extents. Usually this means restoring user file data to |
| * regions of the file that look like holes. |
| * |
| * The "old behavior" (from XFS_IOC_GETBMAP) is to not specify |
| * BMV_IF_NO_DMAPI_READ so that read events are generated. |
| * If this were not true, callers of ioctl( XFS_IOC_GETBMAP ) |
| * could misinterpret holes in a DMAPI file as true holes, |
| * when in fact they may represent offline user data. |
| */ |
| if ( (interface & BMV_IF_NO_DMAPI_READ) == 0 |
| && DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) |
| && whichfork == XFS_DATA_FORK) { |
| |
| error = XFS_SEND_DATA(mp, DM_EVENT_READ, vp, 0, 0, 0, NULL); |
| if (error) |
| return XFS_ERROR(error); |
| } |
| |
| if (whichfork == XFS_ATTR_FORK) { |
| if (XFS_IFORK_Q(ip)) { |
| if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS && |
| ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE && |
| ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL) |
| return XFS_ERROR(EINVAL); |
| } else if (unlikely( |
| ip->i_d.di_aformat != 0 && |
| ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) { |
| XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW, |
| ip->i_mount); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| } else if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS && |
| ip->i_d.di_format != XFS_DINODE_FMT_BTREE && |
| ip->i_d.di_format != XFS_DINODE_FMT_LOCAL) |
| return XFS_ERROR(EINVAL); |
| if (whichfork == XFS_DATA_FORK) { |
| if ((ip->i_d.di_extsize && (ip->i_d.di_flags & |
| (XFS_DIFLAG_REALTIME|XFS_DIFLAG_EXTSIZE))) || |
| ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){ |
| prealloced = 1; |
| fixlen = XFS_MAXIOFFSET(mp); |
| } else { |
| prealloced = 0; |
| fixlen = ip->i_d.di_size; |
| } |
| } else { |
| prealloced = 0; |
| fixlen = 1LL << 32; |
| } |
| |
| if (bmv->bmv_length == -1) { |
| fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen)); |
| bmv->bmv_length = MAX( (__int64_t)(fixlen - bmv->bmv_offset), |
| (__int64_t)0); |
| } else if (bmv->bmv_length < 0) |
| return XFS_ERROR(EINVAL); |
| if (bmv->bmv_length == 0) { |
| bmv->bmv_entries = 0; |
| return 0; |
| } |
| nex = bmv->bmv_count - 1; |
| if (nex <= 0) |
| return XFS_ERROR(EINVAL); |
| bmvend = bmv->bmv_offset + bmv->bmv_length; |
| |
| xfs_ilock(ip, XFS_IOLOCK_SHARED); |
| |
| if (whichfork == XFS_DATA_FORK && ip->i_delayed_blks) { |
| /* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */ |
| error = bhv_vop_flush_pages(vp, (xfs_off_t)0, -1, 0, FI_REMAPF); |
| } |
| |
| ASSERT(whichfork == XFS_ATTR_FORK || ip->i_delayed_blks == 0); |
| |
| lock = xfs_ilock_map_shared(ip); |
| |
| /* |
| * Don't let nex be bigger than the number of extents |
| * we can have assuming alternating holes and real extents. |
| */ |
| if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1) |
| nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1; |
| |
| bmapi_flags = XFS_BMAPI_AFLAG(whichfork) | |
| ((sh_unwritten) ? 0 : XFS_BMAPI_IGSTATE); |
| |
| /* |
| * Allocate enough space to handle "subnex" maps at a time. |
| */ |
| subnex = 16; |
| map = kmem_alloc(subnex * sizeof(*map), KM_SLEEP); |
| |
| bmv->bmv_entries = 0; |
| |
| if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0) { |
| error = 0; |
| goto unlock_and_return; |
| } |
| |
| nexleft = nex; |
| |
| do { |
| nmap = (nexleft > subnex) ? subnex : nexleft; |
| error = xfs_bmapi(NULL, ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset), |
| XFS_BB_TO_FSB(mp, bmv->bmv_length), |
| bmapi_flags, NULL, 0, map, &nmap, |
| NULL, NULL); |
| if (error) |
| goto unlock_and_return; |
| ASSERT(nmap <= subnex); |
| |
| for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) { |
| nexleft--; |
| oflags = (map[i].br_state == XFS_EXT_UNWRITTEN) ? |
| BMV_OF_PREALLOC : 0; |
| out.bmv_offset = XFS_FSB_TO_BB(mp, map[i].br_startoff); |
| out.bmv_length = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
| ASSERT(map[i].br_startblock != DELAYSTARTBLOCK); |
| if (map[i].br_startblock == HOLESTARTBLOCK && |
| ((prealloced && out.bmv_offset + out.bmv_length == bmvend) || |
| whichfork == XFS_ATTR_FORK )) { |
| /* |
| * came to hole at end of file or the end of |
| attribute fork |
| */ |
| goto unlock_and_return; |
| } else { |
| out.bmv_block = |
| (map[i].br_startblock == HOLESTARTBLOCK) ? |
| -1 : |
| XFS_FSB_TO_DB(ip, map[i].br_startblock); |
| |
| /* return either getbmap/getbmapx structure. */ |
| if (interface & BMV_IF_EXTENDED) { |
| struct getbmapx outx; |
| |
| GETBMAP_CONVERT(out,outx); |
| outx.bmv_oflags = oflags; |
| outx.bmv_unused1 = outx.bmv_unused2 = 0; |
| if (copy_to_user(ap, &outx, |
| sizeof(outx))) { |
| error = XFS_ERROR(EFAULT); |
| goto unlock_and_return; |
| } |
| } else { |
| if (copy_to_user(ap, &out, |
| sizeof(out))) { |
| error = XFS_ERROR(EFAULT); |
| goto unlock_and_return; |
| } |
| } |
| bmv->bmv_offset = |
| out.bmv_offset + out.bmv_length; |
| bmv->bmv_length = MAX((__int64_t)0, |
| (__int64_t)(bmvend - bmv->bmv_offset)); |
| bmv->bmv_entries++; |
| ap = (interface & BMV_IF_EXTENDED) ? |
| (void __user *) |
| ((struct getbmapx __user *)ap + 1) : |
| (void __user *) |
| ((struct getbmap __user *)ap + 1); |
| } |
| } |
| } while (nmap && nexleft && bmv->bmv_length); |
| |
| unlock_and_return: |
| xfs_iunlock_map_shared(ip, lock); |
| xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
| |
| kmem_free(map, subnex * sizeof(*map)); |
| |
| return error; |
| } |
| |
| /* |
| * Check the last inode extent to determine whether this allocation will result |
| * in blocks being allocated at the end of the file. When we allocate new data |
| * blocks at the end of the file which do not start at the previous data block, |
| * we will try to align the new blocks at stripe unit boundaries. |
| */ |
| STATIC int /* error */ |
| xfs_bmap_isaeof( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fileoff_t off, /* file offset in fsblocks */ |
| int whichfork, /* data or attribute fork */ |
| char *aeof) /* return value */ |
| { |
| int error; /* error return value */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_rec_t *lastrec; /* extent record pointer */ |
| xfs_extnum_t nextents; /* number of file extents */ |
| xfs_bmbt_irec_t s; /* expanded extent record */ |
| |
| ASSERT(whichfork == XFS_DATA_FORK); |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(NULL, ip, whichfork))) |
| return error; |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| if (nextents == 0) { |
| *aeof = 1; |
| return 0; |
| } |
| /* |
| * Go to the last extent |
| */ |
| lastrec = xfs_iext_get_ext(ifp, nextents - 1); |
| xfs_bmbt_get_all(lastrec, &s); |
| /* |
| * Check we are allocating in the last extent (for delayed allocations) |
| * or past the last extent for non-delayed allocations. |
| */ |
| *aeof = (off >= s.br_startoff && |
| off < s.br_startoff + s.br_blockcount && |
| ISNULLSTARTBLOCK(s.br_startblock)) || |
| off >= s.br_startoff + s.br_blockcount; |
| return 0; |
| } |
| |
| /* |
| * Check if the endoff is outside the last extent. If so the caller will grow |
| * the allocation to a stripe unit boundary. |
| */ |
| int /* error */ |
| xfs_bmap_eof( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| xfs_fileoff_t endoff, /* file offset in fsblocks */ |
| int whichfork, /* data or attribute fork */ |
| int *eof) /* result value */ |
| { |
| xfs_fsblock_t blockcount; /* extent block count */ |
| int error; /* error return value */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_bmbt_rec_t *lastrec; /* extent record pointer */ |
| xfs_extnum_t nextents; /* number of file extents */ |
| xfs_fileoff_t startoff; /* extent starting file offset */ |
| |
| ASSERT(whichfork == XFS_DATA_FORK); |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if (!(ifp->if_flags & XFS_IFEXTENTS) && |
| (error = xfs_iread_extents(NULL, ip, whichfork))) |
| return error; |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| if (nextents == 0) { |
| *eof = 1; |
| return 0; |
| } |
| /* |
| * Go to the last extent |
| */ |
| lastrec = xfs_iext_get_ext(ifp, nextents - 1); |
| startoff = xfs_bmbt_get_startoff(lastrec); |
| blockcount = xfs_bmbt_get_blockcount(lastrec); |
| *eof = endoff >= startoff + blockcount; |
| return 0; |
| } |
| |
| #ifdef DEBUG |
| /* |
| * Check that the extents list for the inode ip is in the right order. |
| */ |
| STATIC void |
| xfs_bmap_check_extents( |
| xfs_inode_t *ip, /* incore inode pointer */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_rec_t *ep; /* current extent entry */ |
| xfs_extnum_t idx; /* extent record index */ |
| xfs_ifork_t *ifp; /* inode fork pointer */ |
| xfs_extnum_t nextents; /* number of extents in list */ |
| xfs_bmbt_rec_t *nextp; /* next extent entry */ |
| |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
| nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
| ep = xfs_iext_get_ext(ifp, 0); |
| for (idx = 0; idx < nextents - 1; idx++) { |
| nextp = xfs_iext_get_ext(ifp, idx + 1); |
| xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)ep, |
| (void *)(nextp)); |
| ep = nextp; |
| } |
| } |
| |
| STATIC |
| xfs_buf_t * |
| xfs_bmap_get_bp( |
| xfs_btree_cur_t *cur, |
| xfs_fsblock_t bno) |
| { |
| int i; |
| xfs_buf_t *bp; |
| |
| if (!cur) |
| return(NULL); |
| |
| bp = NULL; |
| for(i = 0; i < XFS_BTREE_MAXLEVELS; i++) { |
| bp = cur->bc_bufs[i]; |
| if (!bp) break; |
| if (XFS_BUF_ADDR(bp) == bno) |
| break; /* Found it */ |
| } |
| if (i == XFS_BTREE_MAXLEVELS) |
| bp = NULL; |
| |
| if (!bp) { /* Chase down all the log items to see if the bp is there */ |
| xfs_log_item_chunk_t *licp; |
| xfs_trans_t *tp; |
| |
| tp = cur->bc_tp; |
| licp = &tp->t_items; |
| while (!bp && licp != NULL) { |
| if (XFS_LIC_ARE_ALL_FREE(licp)) { |
| licp = licp->lic_next; |
| continue; |
| } |
| for (i = 0; i < licp->lic_unused; i++) { |
| xfs_log_item_desc_t *lidp; |
| xfs_log_item_t *lip; |
| xfs_buf_log_item_t *bip; |
| xfs_buf_t *lbp; |
| |
| if (XFS_LIC_ISFREE(licp, i)) { |
| continue; |
| } |
| |
| lidp = XFS_LIC_SLOT(licp, i); |
| lip = lidp->lid_item; |
| if (lip->li_type != XFS_LI_BUF) |
| continue; |
| |
| bip = (xfs_buf_log_item_t *)lip; |
| lbp = bip->bli_buf; |
| |
| if (XFS_BUF_ADDR(lbp) == bno) { |
| bp = lbp; |
| break; /* Found it */ |
| } |
| } |
| licp = licp->lic_next; |
| } |
| } |
| return(bp); |
| } |
| |
| void |
| xfs_check_block( |
| xfs_bmbt_block_t *block, |
| xfs_mount_t *mp, |
| int root, |
| short sz) |
| { |
| int i, j, dmxr; |
| __be64 *pp, *thispa; /* pointer to block address */ |
| xfs_bmbt_key_t *prevp, *keyp; |
| |
| ASSERT(be16_to_cpu(block->bb_level) > 0); |
| |
| prevp = NULL; |
| for( i = 1; i <= be16_to_cpu(block->bb_numrecs); i++) { |
| dmxr = mp->m_bmap_dmxr[0]; |
| |
| if (root) { |
| keyp = XFS_BMAP_BROOT_KEY_ADDR(block, i, sz); |
| } else { |
| keyp = XFS_BTREE_KEY_ADDR(mp->m_sb.sb_blocksize, |
| xfs_bmbt, block, i, dmxr); |
| } |
| |
| if (prevp) { |
| xfs_btree_check_key(XFS_BTNUM_BMAP, prevp, keyp); |
| } |
| prevp = keyp; |
| |
| /* |
| * Compare the block numbers to see if there are dups. |
| */ |
| |
| if (root) { |
| pp = XFS_BMAP_BROOT_PTR_ADDR(block, i, sz); |
| } else { |
| pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, |
| xfs_bmbt, block, i, dmxr); |
| } |
| for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { |
| if (root) { |
| thispa = XFS_BMAP_BROOT_PTR_ADDR(block, j, sz); |
| } else { |
| thispa = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, |
| xfs_bmbt, block, j, dmxr); |
| } |
| if (*thispa == *pp) { |
| cmn_err(CE_WARN, "%s: thispa(%d) == pp(%d) %Ld", |
| __FUNCTION__, j, i, |
| (unsigned long long)be64_to_cpu(*thispa)); |
| panic("%s: ptrs are equal in node\n", |
| __FUNCTION__); |
| } |
| } |
| } |
| } |
| |
| /* |
| * Check that the extents for the inode ip are in the right order in all |
| * btree leaves. |
| */ |
| |
| STATIC void |
| xfs_bmap_check_leaf_extents( |
| xfs_btree_cur_t *cur, /* btree cursor or null */ |
| xfs_inode_t *ip, /* incore inode pointer */ |
| int whichfork) /* data or attr fork */ |
| { |
| xfs_bmbt_block_t *block; /* current btree block */ |
| xfs_fsblock_t bno; /* block # of "block" */ |
| xfs_buf_t *bp; /* buffer for "block" */ |
| int error; /* error return value */ |
| xfs_extnum_t i=0, j; /* index into the extents list */ |
| xfs_ifork_t *ifp; /* fork structure */ |
| int level; /* btree level, for checking */ |
| xfs_mount_t *mp; /* file system mount structure */ |
| __be64 *pp; /* pointer to block address */ |
| xfs_bmbt_rec_t *ep; /* pointer to current extent */ |
| xfs_bmbt_rec_t *lastp; /* pointer to previous extent */ |
| xfs_bmbt_rec_t *nextp; /* pointer to next extent */ |
| int bp_release = 0; |
| |
| if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { |
| return; |
| } |
| |
| bno = NULLFSBLOCK; |
| mp = ip->i_mount; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| block = ifp->if_broot; |
| /* |
| * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
| */ |
| level = be16_to_cpu(block->bb_level); |
| ASSERT(level > 0); |
| xfs_check_block(block, mp, 1, ifp->if_broot_bytes); |
| pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes); |
| bno = be64_to_cpu(*pp); |
| |
| ASSERT(bno != NULLDFSBNO); |
| ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
| ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); |
| |
| /* |
| * Go down the tree until leaf level is reached, following the first |
| * pointer (leftmost) at each level. |
| */ |
| while (level-- > 0) { |
| /* See if buf is in cur first */ |
| bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); |
| if (bp) { |
| bp_release = 0; |
| } else { |
| bp_release = 1; |
| } |
| if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, |
| XFS_BMAP_BTREE_REF))) |
| goto error_norelse; |
| block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| XFS_WANT_CORRUPTED_GOTO( |
| XFS_BMAP_SANITY_CHECK(mp, block, level), |
| error0); |
| if (level == 0) |
| break; |
| |
| /* |
| * Check this block for basic sanity (increasing keys and |
| * no duplicate blocks). |
| */ |
| |
| xfs_check_block(block, mp, 0, 0); |
| pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, block, |
| 1, mp->m_bmap_dmxr[1]); |
| bno = be64_to_cpu(*pp); |
| XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0); |
| if (bp_release) { |
| bp_release = 0; |
| xfs_trans_brelse(NULL, bp); |
| } |
| } |
| |
| /* |
| * Here with bp and block set to the leftmost leaf node in the tree. |
| */ |
| i = 0; |
| |
| /* |
| * Loop over all leaf nodes checking that all extents are in the right order. |
| */ |
| lastp = NULL; |
| for (;;) { |
| xfs_fsblock_t nextbno; |
| xfs_extnum_t num_recs; |
| |
| |
| num_recs = be16_to_cpu(block->bb_numrecs); |
| |
| /* |
| * Read-ahead the next leaf block, if any. |
| */ |
| |
| nextbno = be64_to_cpu(block->bb_rightsib); |
| |
| /* |
| * Check all the extents to make sure they are OK. |
| * If we had a previous block, the last entry should |
| * conform with the first entry in this one. |
| */ |
| |
| ep = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, |
| block, 1, mp->m_bmap_dmxr[0]); |
| for (j = 1; j < num_recs; j++) { |
| nextp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_bmbt, |
| block, j + 1, mp->m_bmap_dmxr[0]); |
| if (lastp) { |
| xfs_btree_check_rec(XFS_BTNUM_BMAP, |
| (void *)lastp, (void *)ep); |
| } |
| xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)ep, |
| (void *)(nextp)); |
| lastp = ep; |
| ep = nextp; |
| } |
| |
| i += num_recs; |
| if (bp_release) { |
| bp_release = 0; |
| xfs_trans_brelse(NULL, bp); |
| } |
| bno = nextbno; |
| /* |
| * If we've reached the end, stop. |
| */ |
| if (bno == NULLFSBLOCK) |
| break; |
| |
| bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); |
| if (bp) { |
| bp_release = 0; |
| } else { |
| bp_release = 1; |
| } |
| if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, |
| XFS_BMAP_BTREE_REF))) |
| goto error_norelse; |
| block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| } |
| if (bp_release) { |
| bp_release = 0; |
| xfs_trans_brelse(NULL, bp); |
| } |
| return; |
| |
| error0: |
| cmn_err(CE_WARN, "%s: at error0", __FUNCTION__); |
| if (bp_release) |
| xfs_trans_brelse(NULL, bp); |
| error_norelse: |
| cmn_err(CE_WARN, "%s: BAD after btree leaves for %d extents", |
| __FUNCTION__, i); |
| panic("%s: CORRUPTED BTREE OR SOMETHING", __FUNCTION__); |
| return; |
| } |
| #endif |
| |
| /* |
| * Count fsblocks of the given fork. |
| */ |
| int /* error */ |
| xfs_bmap_count_blocks( |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_inode_t *ip, /* incore inode */ |
| int whichfork, /* data or attr fork */ |
| int *count) /* out: count of blocks */ |
| { |
| xfs_bmbt_block_t *block; /* current btree block */ |
| xfs_fsblock_t bno; /* block # of "block" */ |
| xfs_ifork_t *ifp; /* fork structure */ |
| int level; /* btree level, for checking */ |
| xfs_mount_t *mp; /* file system mount structure */ |
| __be64 *pp; /* pointer to block address */ |
| |
| bno = NULLFSBLOCK; |
| mp = ip->i_mount; |
| ifp = XFS_IFORK_PTR(ip, whichfork); |
| if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) { |
| if (unlikely(xfs_bmap_count_leaves(ifp, 0, |
| ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t), |
| count) < 0)) { |
| XFS_ERROR_REPORT("xfs_bmap_count_blocks(1)", |
| XFS_ERRLEVEL_LOW, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| return 0; |
| } |
| |
| /* |
| * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
| */ |
| block = ifp->if_broot; |
| level = be16_to_cpu(block->bb_level); |
| ASSERT(level > 0); |
| pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes); |
| bno = be64_to_cpu(*pp); |
| ASSERT(bno != NULLDFSBNO); |
| ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
| ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); |
| |
| if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) { |
| XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW, |
| mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Recursively walks each level of a btree |
| * to count total fsblocks is use. |
| */ |
| int /* error */ |
| xfs_bmap_count_tree( |
| xfs_mount_t *mp, /* file system mount point */ |
| xfs_trans_t *tp, /* transaction pointer */ |
| xfs_ifork_t *ifp, /* inode fork pointer */ |
| xfs_fsblock_t blockno, /* file system block number */ |
| int levelin, /* level in btree */ |
| int *count) /* Count of blocks */ |
| { |
| int error; |
| xfs_buf_t *bp, *nbp; |
| int level = levelin; |
| __be64 *pp; |
| xfs_fsblock_t bno = blockno; |
| xfs_fsblock_t nextbno; |
| xfs_bmbt_block_t *block, *nextblock; |
| int numrecs; |
| |
| if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF))) |
| return error; |
| *count += 1; |
| block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| |
| if (--level) { |
| /* Not at node above leafs, count this level of nodes */ |
| nextbno = be64_to_cpu(block->bb_rightsib); |
| while (nextbno != NULLFSBLOCK) { |
| if ((error = xfs_btree_read_bufl(mp, tp, nextbno, |
| 0, &nbp, XFS_BMAP_BTREE_REF))) |
| return error; |
| *count += 1; |
| nextblock = XFS_BUF_TO_BMBT_BLOCK(nbp); |
| nextbno = be64_to_cpu(nextblock->bb_rightsib); |
| xfs_trans_brelse(tp, nbp); |
| } |
| |
| /* Dive to the next level */ |
| pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, |
| xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]); |
| bno = be64_to_cpu(*pp); |
| if (unlikely((error = |
| xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) { |
| xfs_trans_brelse(tp, bp); |
| XFS_ERROR_REPORT("xfs_bmap_count_tree(1)", |
| XFS_ERRLEVEL_LOW, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| xfs_trans_brelse(tp, bp); |
| } else { |
| /* count all level 1 nodes and their leaves */ |
| for (;;) { |
| nextbno = be64_to_cpu(block->bb_rightsib); |
| numrecs = be16_to_cpu(block->bb_numrecs); |
| if (unlikely(xfs_bmap_disk_count_leaves(ifp, mp, |
| 0, block, numrecs, count) < 0)) { |
| xfs_trans_brelse(tp, bp); |
| XFS_ERROR_REPORT("xfs_bmap_count_tree(2)", |
| XFS_ERRLEVEL_LOW, mp); |
| return XFS_ERROR(EFSCORRUPTED); |
| } |
| xfs_trans_brelse(tp, bp); |
| if (nextbno == NULLFSBLOCK) |
| break; |
| bno = nextbno; |
| if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, |
| XFS_BMAP_BTREE_REF))) |
| return error; |
| *count += 1; |
| block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * Count leaf blocks given a range of extent records. |
| */ |
| int |
| xfs_bmap_count_leaves( |
| xfs_ifork_t *ifp, |
| xfs_extnum_t idx, |
| int numrecs, |
| int *count) |
| { |
| int b; |
| xfs_bmbt_rec_t *frp; |
| |
| for (b = 0; b < numrecs; b++) { |
| frp = xfs_iext_get_ext(ifp, idx + b); |
| *count += xfs_bmbt_get_blockcount(frp); |
| } |
| return 0; |
| } |
| |
| /* |
| * Count leaf blocks given a range of extent records originally |
| * in btree format. |
| */ |
| int |
| xfs_bmap_disk_count_leaves( |
| xfs_ifork_t *ifp, |
| xfs_mount_t *mp, |
| xfs_extnum_t idx, |
| xfs_bmbt_block_t *block, |
| int numrecs, |
| int *count) |
| { |
| int b; |
| xfs_bmbt_rec_t *frp; |
| |
| for (b = 1; b <= numrecs; b++) { |
| frp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, |
| xfs_bmbt, block, idx + b, mp->m_bmap_dmxr[0]); |
| *count += xfs_bmbt_disk_get_blockcount(frp); |
| } |
| return 0; |
| } |