2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_types.h"
24 #include "xfs_trans.h"
28 #include "xfs_da_btree.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_alloc_btree.h"
31 #include "xfs_ialloc_btree.h"
32 #include "xfs_dir2_sf.h"
33 #include "xfs_attr_sf.h"
34 #include "xfs_dinode.h"
35 #include "xfs_inode.h"
36 #include "xfs_btree.h"
37 #include "xfs_dmapi.h"
38 #include "xfs_mount.h"
39 #include "xfs_ialloc.h"
40 #include "xfs_itable.h"
41 #include "xfs_dir2_data.h"
42 #include "xfs_dir2_leaf.h"
43 #include "xfs_dir2_block.h"
44 #include "xfs_inode_item.h"
45 #include "xfs_extfree_item.h"
46 #include "xfs_alloc.h"
48 #include "xfs_rtalloc.h"
49 #include "xfs_error.h"
50 #include "xfs_attr_leaf.h"
52 #include "xfs_quota.h"
53 #include "xfs_trans_space.h"
54 #include "xfs_buf_item.h"
55 #include "xfs_filestream.h"
56 #include "xfs_vnodeops.h"
61 xfs_bmap_check_leaf_extents(xfs_btree_cur_t *cur, xfs_inode_t *ip, int whichfork);
64 kmem_zone_t *xfs_bmap_free_item_zone;
67 * Prototypes for internal bmap routines.
72 * Called from xfs_bmap_add_attrfork to handle extents format files.
74 STATIC int /* error */
75 xfs_bmap_add_attrfork_extents(
76 xfs_trans_t *tp, /* transaction pointer */
77 xfs_inode_t *ip, /* incore inode pointer */
78 xfs_fsblock_t *firstblock, /* first block allocated */
79 xfs_bmap_free_t *flist, /* blocks to free at commit */
80 int *flags); /* inode logging flags */
83 * Called from xfs_bmap_add_attrfork to handle local format files.
85 STATIC int /* error */
86 xfs_bmap_add_attrfork_local(
87 xfs_trans_t *tp, /* transaction pointer */
88 xfs_inode_t *ip, /* incore inode pointer */
89 xfs_fsblock_t *firstblock, /* first block allocated */
90 xfs_bmap_free_t *flist, /* blocks to free at commit */
91 int *flags); /* inode logging flags */
94 * Called by xfs_bmapi to update file extent records and the btree
95 * after allocating space (or doing a delayed allocation).
97 STATIC int /* error */
99 xfs_inode_t *ip, /* incore inode pointer */
100 xfs_extnum_t idx, /* extent number to update/insert */
101 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
102 xfs_bmbt_irec_t *new, /* new data to add to file extents */
103 xfs_fsblock_t *first, /* pointer to firstblock variable */
104 xfs_bmap_free_t *flist, /* list of extents to be freed */
105 int *logflagsp, /* inode logging flags */
106 xfs_extdelta_t *delta, /* Change made to incore extents */
107 int whichfork, /* data or attr fork */
108 int rsvd); /* OK to allocate reserved blocks */
111 * Called by xfs_bmap_add_extent to handle cases converting a delayed
112 * allocation to a real allocation.
114 STATIC int /* error */
115 xfs_bmap_add_extent_delay_real(
116 xfs_inode_t *ip, /* incore inode pointer */
117 xfs_extnum_t idx, /* extent number to update/insert */
118 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
119 xfs_bmbt_irec_t *new, /* new data to add to file extents */
120 xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */
121 xfs_fsblock_t *first, /* pointer to firstblock variable */
122 xfs_bmap_free_t *flist, /* list of extents to be freed */
123 int *logflagsp, /* inode logging flags */
124 xfs_extdelta_t *delta, /* Change made to incore extents */
125 int rsvd); /* OK to allocate reserved blocks */
128 * Called by xfs_bmap_add_extent to handle cases converting a hole
129 * to a delayed allocation.
131 STATIC int /* error */
132 xfs_bmap_add_extent_hole_delay(
133 xfs_inode_t *ip, /* incore inode pointer */
134 xfs_extnum_t idx, /* extent number to update/insert */
135 xfs_bmbt_irec_t *new, /* new data to add to file extents */
136 int *logflagsp,/* inode logging flags */
137 xfs_extdelta_t *delta, /* Change made to incore extents */
138 int rsvd); /* OK to allocate reserved blocks */
141 * Called by xfs_bmap_add_extent to handle cases converting a hole
142 * to a real allocation.
144 STATIC int /* error */
145 xfs_bmap_add_extent_hole_real(
146 xfs_inode_t *ip, /* incore inode pointer */
147 xfs_extnum_t idx, /* extent number to update/insert */
148 xfs_btree_cur_t *cur, /* if null, not a btree */
149 xfs_bmbt_irec_t *new, /* new data to add to file extents */
150 int *logflagsp, /* inode logging flags */
151 xfs_extdelta_t *delta, /* Change made to incore extents */
152 int whichfork); /* data or attr fork */
155 * Called by xfs_bmap_add_extent to handle cases converting an unwritten
156 * allocation to a real allocation or vice versa.
158 STATIC int /* error */
159 xfs_bmap_add_extent_unwritten_real(
160 xfs_inode_t *ip, /* incore inode pointer */
161 xfs_extnum_t idx, /* extent number to update/insert */
162 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
163 xfs_bmbt_irec_t *new, /* new data to add to file extents */
164 int *logflagsp, /* inode logging flags */
165 xfs_extdelta_t *delta); /* Change made to incore extents */
168 * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
169 * It figures out where to ask the underlying allocator to put the new extent.
171 STATIC int /* error */
173 xfs_bmalloca_t *ap); /* bmap alloc argument struct */
176 * Transform a btree format file with only one leaf node, where the
177 * extents list will fit in the inode, into an extents format file.
178 * Since the file extents are already in-core, all we have to do is
179 * give up the space for the btree root and pitch the leaf block.
181 STATIC int /* error */
182 xfs_bmap_btree_to_extents(
183 xfs_trans_t *tp, /* transaction pointer */
184 xfs_inode_t *ip, /* incore inode pointer */
185 xfs_btree_cur_t *cur, /* btree cursor */
186 int *logflagsp, /* inode logging flags */
187 int whichfork); /* data or attr fork */
190 * Called by xfs_bmapi to update file extent records and the btree
191 * after removing space (or undoing a delayed allocation).
193 STATIC int /* error */
195 xfs_inode_t *ip, /* incore inode pointer */
196 xfs_trans_t *tp, /* current trans pointer */
197 xfs_extnum_t idx, /* extent number to update/insert */
198 xfs_bmap_free_t *flist, /* list of extents to be freed */
199 xfs_btree_cur_t *cur, /* if null, not a btree */
200 xfs_bmbt_irec_t *new, /* new data to add to file extents */
201 int *logflagsp,/* inode logging flags */
202 xfs_extdelta_t *delta, /* Change made to incore extents */
203 int whichfork, /* data or attr fork */
204 int rsvd); /* OK to allocate reserved blocks */
207 * Remove the entry "free" from the free item list. Prev points to the
208 * previous entry, unless "free" is the head of the list.
212 xfs_bmap_free_t *flist, /* free item list header */
213 xfs_bmap_free_item_t *prev, /* previous item on list, if any */
214 xfs_bmap_free_item_t *free); /* list item to be freed */
217 * Convert an extents-format file into a btree-format file.
218 * The new file will have a root block (in the inode) and a single child block.
220 STATIC int /* error */
221 xfs_bmap_extents_to_btree(
222 xfs_trans_t *tp, /* transaction pointer */
223 xfs_inode_t *ip, /* incore inode pointer */
224 xfs_fsblock_t *firstblock, /* first-block-allocated */
225 xfs_bmap_free_t *flist, /* blocks freed in xaction */
226 xfs_btree_cur_t **curp, /* cursor returned to caller */
227 int wasdel, /* converting a delayed alloc */
228 int *logflagsp, /* inode logging flags */
229 int whichfork); /* data or attr fork */
232 * Convert a local file to an extents file.
233 * This code is sort of bogus, since the file data needs to get
234 * logged so it won't be lost. The bmap-level manipulations are ok, though.
236 STATIC int /* error */
237 xfs_bmap_local_to_extents(
238 xfs_trans_t *tp, /* transaction pointer */
239 xfs_inode_t *ip, /* incore inode pointer */
240 xfs_fsblock_t *firstblock, /* first block allocated in xaction */
241 xfs_extlen_t total, /* total blocks needed by transaction */
242 int *logflagsp, /* inode logging flags */
243 int whichfork); /* data or attr fork */
246 * Search the extents list for the inode, for the extent containing bno.
247 * If bno lies in a hole, point to the next entry. If bno lies past eof,
248 * *eofp will be set, and *prevp will contain the last entry (null if none).
249 * Else, *lastxp will be set to the index of the found
250 * entry; *gotp will contain the entry.
252 STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
253 xfs_bmap_search_extents(
254 xfs_inode_t *ip, /* incore inode pointer */
255 xfs_fileoff_t bno, /* block number searched for */
256 int whichfork, /* data or attr fork */
257 int *eofp, /* out: end of file found */
258 xfs_extnum_t *lastxp, /* out: last extent index */
259 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
260 xfs_bmbt_irec_t *prevp); /* out: previous extent entry found */
263 * Check the last inode extent to determine whether this allocation will result
264 * in blocks being allocated at the end of the file. When we allocate new data
265 * blocks at the end of the file which do not start at the previous data block,
266 * we will try to align the new blocks at stripe unit boundaries.
268 STATIC int /* error */
270 xfs_inode_t *ip, /* incore inode pointer */
271 xfs_fileoff_t off, /* file offset in fsblocks */
272 int whichfork, /* data or attribute fork */
273 char *aeof); /* return value */
275 #ifdef XFS_BMAP_TRACE
277 * Add bmap trace entry prior to a call to xfs_iext_remove.
280 xfs_bmap_trace_delete(
281 const char *fname, /* function name */
282 char *desc, /* operation description */
283 xfs_inode_t *ip, /* incore inode pointer */
284 xfs_extnum_t idx, /* index of entry(entries) deleted */
285 xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */
286 int whichfork); /* data or attr fork */
289 * Add bmap trace entry prior to a call to xfs_iext_insert, or
290 * reading in the extents list from the disk (in the btree).
293 xfs_bmap_trace_insert(
294 const char *fname, /* function name */
295 char *desc, /* operation description */
296 xfs_inode_t *ip, /* incore inode pointer */
297 xfs_extnum_t idx, /* index of entry(entries) inserted */
298 xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */
299 xfs_bmbt_irec_t *r1, /* inserted record 1 */
300 xfs_bmbt_irec_t *r2, /* inserted record 2 or null */
301 int whichfork); /* data or attr fork */
304 * Add bmap trace entry after updating an extent record in place.
307 xfs_bmap_trace_post_update(
308 const char *fname, /* function name */
309 char *desc, /* operation description */
310 xfs_inode_t *ip, /* incore inode pointer */
311 xfs_extnum_t idx, /* index of entry updated */
312 int whichfork); /* data or attr fork */
315 * Add bmap trace entry prior to updating an extent record in place.
318 xfs_bmap_trace_pre_update(
319 const char *fname, /* function name */
320 char *desc, /* operation description */
321 xfs_inode_t *ip, /* incore inode pointer */
322 xfs_extnum_t idx, /* index of entry to be updated */
323 int whichfork); /* data or attr fork */
325 #define XFS_BMAP_TRACE_DELETE(d,ip,i,c,w) \
326 xfs_bmap_trace_delete(__func__,d,ip,i,c,w)
327 #define XFS_BMAP_TRACE_INSERT(d,ip,i,c,r1,r2,w) \
328 xfs_bmap_trace_insert(__func__,d,ip,i,c,r1,r2,w)
329 #define XFS_BMAP_TRACE_POST_UPDATE(d,ip,i,w) \
330 xfs_bmap_trace_post_update(__func__,d,ip,i,w)
331 #define XFS_BMAP_TRACE_PRE_UPDATE(d,ip,i,w) \
332 xfs_bmap_trace_pre_update(__func__,d,ip,i,w)
334 #define XFS_BMAP_TRACE_DELETE(d,ip,i,c,w)
335 #define XFS_BMAP_TRACE_INSERT(d,ip,i,c,r1,r2,w)
336 #define XFS_BMAP_TRACE_POST_UPDATE(d,ip,i,w)
337 #define XFS_BMAP_TRACE_PRE_UPDATE(d,ip,i,w)
338 #endif /* XFS_BMAP_TRACE */
341 * Compute the worst-case number of indirect blocks that will be used
342 * for ip's delayed extent of length "len".
345 xfs_bmap_worst_indlen(
346 xfs_inode_t *ip, /* incore inode pointer */
347 xfs_filblks_t len); /* delayed extent length */
351 * Perform various validation checks on the values being returned
355 xfs_bmap_validate_ret(
359 xfs_bmbt_irec_t *mval,
363 #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
366 #if defined(XFS_RW_TRACE)
375 #define xfs_bunmap_trace(ip, bno, len, flags, ra)
376 #endif /* XFS_RW_TRACE */
383 xfs_fsblock_t blockno,
388 xfs_bmap_count_leaves(
395 xfs_bmap_disk_count_leaves(
396 struct xfs_mount *mp,
397 struct xfs_btree_block *block,
402 * Bmap internal routines.
405 STATIC int /* error */
407 struct xfs_btree_cur *cur,
411 int *stat) /* success/failure */
413 cur->bc_rec.b.br_startoff = off;
414 cur->bc_rec.b.br_startblock = bno;
415 cur->bc_rec.b.br_blockcount = len;
416 return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
419 STATIC int /* error */
421 struct xfs_btree_cur *cur,
425 int *stat) /* success/failure */
427 cur->bc_rec.b.br_startoff = off;
428 cur->bc_rec.b.br_startblock = bno;
429 cur->bc_rec.b.br_blockcount = len;
430 return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
434 * Update the record referred to by cur to the value given
435 * by [off, bno, len, state].
436 * This either works (return 0) or gets an EFSCORRUPTED error.
440 struct xfs_btree_cur *cur,
446 union xfs_btree_rec rec;
448 xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state);
449 return xfs_btree_update(cur, &rec);
453 * Called from xfs_bmap_add_attrfork to handle btree format files.
455 STATIC int /* error */
456 xfs_bmap_add_attrfork_btree(
457 xfs_trans_t *tp, /* transaction pointer */
458 xfs_inode_t *ip, /* incore inode pointer */
459 xfs_fsblock_t *firstblock, /* first block allocated */
460 xfs_bmap_free_t *flist, /* blocks to free at commit */
461 int *flags) /* inode logging flags */
463 xfs_btree_cur_t *cur; /* btree cursor */
464 int error; /* error return value */
465 xfs_mount_t *mp; /* file system mount struct */
466 int stat; /* newroot status */
469 if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
470 *flags |= XFS_ILOG_DBROOT;
472 cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK);
473 cur->bc_private.b.flist = flist;
474 cur->bc_private.b.firstblock = *firstblock;
475 if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
477 /* must be at least one entry */
478 XFS_WANT_CORRUPTED_GOTO(stat == 1, error0);
479 if ((error = xfs_btree_new_iroot(cur, flags, &stat)))
482 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
483 return XFS_ERROR(ENOSPC);
485 *firstblock = cur->bc_private.b.firstblock;
486 cur->bc_private.b.allocated = 0;
487 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
491 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
496 * Called from xfs_bmap_add_attrfork to handle extents format files.
498 STATIC int /* error */
499 xfs_bmap_add_attrfork_extents(
500 xfs_trans_t *tp, /* transaction pointer */
501 xfs_inode_t *ip, /* incore inode pointer */
502 xfs_fsblock_t *firstblock, /* first block allocated */
503 xfs_bmap_free_t *flist, /* blocks to free at commit */
504 int *flags) /* inode logging flags */
506 xfs_btree_cur_t *cur; /* bmap btree cursor */
507 int error; /* error return value */
509 if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
512 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
513 flags, XFS_DATA_FORK);
515 cur->bc_private.b.allocated = 0;
516 xfs_btree_del_cursor(cur,
517 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
523 * Called from xfs_bmap_add_attrfork to handle local format files.
525 STATIC int /* error */
526 xfs_bmap_add_attrfork_local(
527 xfs_trans_t *tp, /* transaction pointer */
528 xfs_inode_t *ip, /* incore inode pointer */
529 xfs_fsblock_t *firstblock, /* first block allocated */
530 xfs_bmap_free_t *flist, /* blocks to free at commit */
531 int *flags) /* inode logging flags */
533 xfs_da_args_t dargs; /* args for dir/attr code */
534 int error; /* error return value */
535 xfs_mount_t *mp; /* mount structure pointer */
537 if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
539 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
541 memset(&dargs, 0, sizeof(dargs));
543 dargs.firstblock = firstblock;
545 dargs.total = mp->m_dirblkfsbs;
546 dargs.whichfork = XFS_DATA_FORK;
548 error = xfs_dir2_sf_to_block(&dargs);
550 error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags,
556 * Called by xfs_bmapi to update file extent records and the btree
557 * after allocating space (or doing a delayed allocation).
559 STATIC int /* error */
561 xfs_inode_t *ip, /* incore inode pointer */
562 xfs_extnum_t idx, /* extent number to update/insert */
563 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
564 xfs_bmbt_irec_t *new, /* new data to add to file extents */
565 xfs_fsblock_t *first, /* pointer to firstblock variable */
566 xfs_bmap_free_t *flist, /* list of extents to be freed */
567 int *logflagsp, /* inode logging flags */
568 xfs_extdelta_t *delta, /* Change made to incore extents */
569 int whichfork, /* data or attr fork */
570 int rsvd) /* OK to use reserved data blocks */
572 xfs_btree_cur_t *cur; /* btree cursor or null */
573 xfs_filblks_t da_new; /* new count del alloc blocks used */
574 xfs_filblks_t da_old; /* old count del alloc blocks used */
575 int error; /* error return value */
576 xfs_ifork_t *ifp; /* inode fork ptr */
577 int logflags; /* returned value */
578 xfs_extnum_t nextents; /* number of extents in file now */
580 XFS_STATS_INC(xs_add_exlist);
582 ifp = XFS_IFORK_PTR(ip, whichfork);
583 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
584 ASSERT(idx <= nextents);
588 * This is the first extent added to a new/empty file.
589 * Special case this one, so other routines get to assume there are
590 * already extents in the list.
593 XFS_BMAP_TRACE_INSERT("insert empty", ip, 0, 1, new, NULL,
595 xfs_iext_insert(ifp, 0, 1, new);
598 if (!isnullstartblock(new->br_startblock)) {
599 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
600 logflags = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
603 /* DELTA: single new extent */
605 if (delta->xed_startoff > new->br_startoff)
606 delta->xed_startoff = new->br_startoff;
607 if (delta->xed_blockcount <
608 new->br_startoff + new->br_blockcount)
609 delta->xed_blockcount = new->br_startoff +
614 * Any kind of new delayed allocation goes here.
616 else if (isnullstartblock(new->br_startblock)) {
618 ASSERT((cur->bc_private.b.flags &
619 XFS_BTCUR_BPRV_WASDEL) == 0);
620 if ((error = xfs_bmap_add_extent_hole_delay(ip, idx, new,
621 &logflags, delta, rsvd)))
625 * Real allocation off the end of the file.
627 else if (idx == nextents) {
629 ASSERT((cur->bc_private.b.flags &
630 XFS_BTCUR_BPRV_WASDEL) == 0);
631 if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, new,
632 &logflags, delta, whichfork)))
635 xfs_bmbt_irec_t prev; /* old extent at offset idx */
638 * Get the record referred to by idx.
640 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &prev);
642 * If it's a real allocation record, and the new allocation ends
643 * after the start of the referred to record, then we're filling
644 * in a delayed or unwritten allocation with a real one, or
645 * converting real back to unwritten.
647 if (!isnullstartblock(new->br_startblock) &&
648 new->br_startoff + new->br_blockcount > prev.br_startoff) {
649 if (prev.br_state != XFS_EXT_UNWRITTEN &&
650 isnullstartblock(prev.br_startblock)) {
651 da_old = startblockval(prev.br_startblock);
653 ASSERT(cur->bc_private.b.flags &
654 XFS_BTCUR_BPRV_WASDEL);
655 if ((error = xfs_bmap_add_extent_delay_real(ip,
656 idx, &cur, new, &da_new, first, flist,
657 &logflags, delta, rsvd)))
659 } else if (new->br_state == XFS_EXT_NORM) {
660 ASSERT(new->br_state == XFS_EXT_NORM);
661 if ((error = xfs_bmap_add_extent_unwritten_real(
662 ip, idx, &cur, new, &logflags, delta)))
665 ASSERT(new->br_state == XFS_EXT_UNWRITTEN);
666 if ((error = xfs_bmap_add_extent_unwritten_real(
667 ip, idx, &cur, new, &logflags, delta)))
670 ASSERT(*curp == cur || *curp == NULL);
673 * Otherwise we're filling in a hole with an allocation.
677 ASSERT((cur->bc_private.b.flags &
678 XFS_BTCUR_BPRV_WASDEL) == 0);
679 if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur,
680 new, &logflags, delta, whichfork)))
685 ASSERT(*curp == cur || *curp == NULL);
687 * Convert to a btree if necessary.
689 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
690 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
691 int tmp_logflags; /* partial log flag return val */
694 error = xfs_bmap_extents_to_btree(ip->i_transp, ip, first,
695 flist, &cur, da_old > 0, &tmp_logflags, whichfork);
696 logflags |= tmp_logflags;
701 * Adjust for changes in reserved delayed indirect blocks.
702 * Nothing to do for disk quotas here.
704 if (da_old || da_new) {
709 nblks += cur->bc_private.b.allocated;
710 ASSERT(nblks <= da_old);
712 xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS,
713 (int64_t)(da_old - nblks), rsvd);
716 * Clear out the allocated field, done with it now in any case.
719 cur->bc_private.b.allocated = 0;
725 xfs_bmap_check_leaf_extents(*curp, ip, whichfork);
727 *logflagsp = logflags;
732 * Called by xfs_bmap_add_extent to handle cases converting a delayed
733 * allocation to a real allocation.
735 STATIC int /* error */
736 xfs_bmap_add_extent_delay_real(
737 xfs_inode_t *ip, /* incore inode pointer */
738 xfs_extnum_t idx, /* extent number to update/insert */
739 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
740 xfs_bmbt_irec_t *new, /* new data to add to file extents */
741 xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */
742 xfs_fsblock_t *first, /* pointer to firstblock variable */
743 xfs_bmap_free_t *flist, /* list of extents to be freed */
744 int *logflagsp, /* inode logging flags */
745 xfs_extdelta_t *delta, /* Change made to incore extents */
746 int rsvd) /* OK to use reserved data block allocation */
748 xfs_btree_cur_t *cur; /* btree cursor */
749 int diff; /* temp value */
750 xfs_bmbt_rec_host_t *ep; /* extent entry for idx */
751 int error; /* error return value */
752 int i; /* temp state */
753 xfs_ifork_t *ifp; /* inode fork pointer */
754 xfs_fileoff_t new_endoff; /* end offset of new entry */
755 xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
756 /* left is 0, right is 1, prev is 2 */
757 int rval=0; /* return value (logging flags) */
758 int state = 0;/* state bits, accessed thru macros */
759 xfs_filblks_t temp=0; /* value for dnew calculations */
760 xfs_filblks_t temp2=0;/* value for dnew calculations */
761 int tmp_rval; /* partial logging flags */
762 enum { /* bit number definitions for state */
763 LEFT_CONTIG, RIGHT_CONTIG,
764 LEFT_FILLING, RIGHT_FILLING,
765 LEFT_DELAY, RIGHT_DELAY,
766 LEFT_VALID, RIGHT_VALID
772 #define MASK(b) (1 << (b))
773 #define MASK2(a,b) (MASK(a) | MASK(b))
774 #define MASK3(a,b,c) (MASK2(a,b) | MASK(c))
775 #define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d))
776 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
777 #define STATE_TEST(b) (state & MASK(b))
778 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
779 ((state &= ~MASK(b)), 0))
780 #define SWITCH_STATE \
781 (state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG))
784 * Set up a bunch of variables to make the tests simpler.
787 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
788 ep = xfs_iext_get_ext(ifp, idx);
789 xfs_bmbt_get_all(ep, &PREV);
790 new_endoff = new->br_startoff + new->br_blockcount;
791 ASSERT(PREV.br_startoff <= new->br_startoff);
792 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
794 * Set flags determining what part of the previous delayed allocation
795 * extent is being replaced by a real allocation.
797 STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff);
798 STATE_SET(RIGHT_FILLING,
799 PREV.br_startoff + PREV.br_blockcount == new_endoff);
801 * Check and set flags if this segment has a left neighbor.
802 * Don't set contiguous if the combined extent would be too large.
804 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
805 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
806 STATE_SET(LEFT_DELAY, isnullstartblock(LEFT.br_startblock));
808 STATE_SET(LEFT_CONTIG,
809 STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
810 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
811 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
812 LEFT.br_state == new->br_state &&
813 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN);
815 * Check and set flags if this segment has a right neighbor.
816 * Don't set contiguous if the combined extent would be too large.
817 * Also check for all-three-contiguous being too large.
819 if (STATE_SET_TEST(RIGHT_VALID,
821 ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) {
822 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
823 STATE_SET(RIGHT_DELAY, isnullstartblock(RIGHT.br_startblock));
825 STATE_SET(RIGHT_CONTIG,
826 STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
827 new_endoff == RIGHT.br_startoff &&
828 new->br_startblock + new->br_blockcount ==
829 RIGHT.br_startblock &&
830 new->br_state == RIGHT.br_state &&
831 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
832 ((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) !=
833 MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) ||
834 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
838 * Switch out based on the FILLING and CONTIG state bits.
840 switch (SWITCH_STATE) {
842 case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
844 * Filling in all of a previously delayed allocation extent.
845 * The left and right neighbors are both contiguous with new.
847 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC|RC", ip, idx - 1,
849 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
850 LEFT.br_blockcount + PREV.br_blockcount +
851 RIGHT.br_blockcount);
852 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC|RC", ip, idx - 1,
854 XFS_BMAP_TRACE_DELETE("LF|RF|LC|RC", ip, idx, 2, XFS_DATA_FORK);
855 xfs_iext_remove(ifp, idx, 2);
856 ip->i_df.if_lastex = idx - 1;
857 ip->i_d.di_nextents--;
859 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
861 rval = XFS_ILOG_CORE;
862 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
864 RIGHT.br_blockcount, &i)))
866 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
867 if ((error = xfs_btree_delete(cur, &i)))
869 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
870 if ((error = xfs_btree_decrement(cur, 0, &i)))
872 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
873 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
877 RIGHT.br_blockcount, LEFT.br_state)))
881 /* DELTA: Three in-core extents are replaced by one. */
882 temp = LEFT.br_startoff;
883 temp2 = LEFT.br_blockcount +
888 case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG):
890 * Filling in all of a previously delayed allocation extent.
891 * The left neighbor is contiguous, the right is not.
893 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC", ip, idx - 1,
895 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
896 LEFT.br_blockcount + PREV.br_blockcount);
897 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC", ip, idx - 1,
899 ip->i_df.if_lastex = idx - 1;
900 XFS_BMAP_TRACE_DELETE("LF|RF|LC", ip, idx, 1, XFS_DATA_FORK);
901 xfs_iext_remove(ifp, idx, 1);
903 rval = XFS_ILOG_DEXT;
906 if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
907 LEFT.br_startblock, LEFT.br_blockcount,
910 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
911 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
914 PREV.br_blockcount, LEFT.br_state)))
918 /* DELTA: Two in-core extents are replaced by one. */
919 temp = LEFT.br_startoff;
920 temp2 = LEFT.br_blockcount +
924 case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG):
926 * Filling in all of a previously delayed allocation extent.
927 * The right neighbor is contiguous, the left is not.
929 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|RC", ip, idx, XFS_DATA_FORK);
930 xfs_bmbt_set_startblock(ep, new->br_startblock);
931 xfs_bmbt_set_blockcount(ep,
932 PREV.br_blockcount + RIGHT.br_blockcount);
933 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|RC", ip, idx, XFS_DATA_FORK);
934 ip->i_df.if_lastex = idx;
935 XFS_BMAP_TRACE_DELETE("LF|RF|RC", ip, idx + 1, 1, XFS_DATA_FORK);
936 xfs_iext_remove(ifp, idx + 1, 1);
938 rval = XFS_ILOG_DEXT;
941 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
943 RIGHT.br_blockcount, &i)))
945 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
946 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
949 RIGHT.br_blockcount, PREV.br_state)))
953 /* DELTA: Two in-core extents are replaced by one. */
954 temp = PREV.br_startoff;
955 temp2 = PREV.br_blockcount +
959 case MASK2(LEFT_FILLING, RIGHT_FILLING):
961 * Filling in all of a previously delayed allocation extent.
962 * Neither the left nor right neighbors are contiguous with
965 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF", ip, idx, XFS_DATA_FORK);
966 xfs_bmbt_set_startblock(ep, new->br_startblock);
967 XFS_BMAP_TRACE_POST_UPDATE("LF|RF", ip, idx, XFS_DATA_FORK);
968 ip->i_df.if_lastex = idx;
969 ip->i_d.di_nextents++;
971 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
973 rval = XFS_ILOG_CORE;
974 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
975 new->br_startblock, new->br_blockcount,
978 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
979 cur->bc_rec.b.br_state = XFS_EXT_NORM;
980 if ((error = xfs_btree_insert(cur, &i)))
982 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
985 /* DELTA: The in-core extent described by new changed type. */
986 temp = new->br_startoff;
987 temp2 = new->br_blockcount;
990 case MASK2(LEFT_FILLING, LEFT_CONTIG):
992 * Filling in the first part of a previous delayed allocation.
993 * The left neighbor is contiguous.
995 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx - 1, XFS_DATA_FORK);
996 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
997 LEFT.br_blockcount + new->br_blockcount);
998 xfs_bmbt_set_startoff(ep,
999 PREV.br_startoff + new->br_blockcount);
1000 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx - 1, XFS_DATA_FORK);
1001 temp = PREV.br_blockcount - new->br_blockcount;
1002 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx, XFS_DATA_FORK);
1003 xfs_bmbt_set_blockcount(ep, temp);
1004 ip->i_df.if_lastex = idx - 1;
1006 rval = XFS_ILOG_DEXT;
1009 if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
1010 LEFT.br_startblock, LEFT.br_blockcount,
1013 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1014 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1016 LEFT.br_blockcount +
1021 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1022 startblockval(PREV.br_startblock));
1023 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1024 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx, XFS_DATA_FORK);
1026 /* DELTA: The boundary between two in-core extents moved. */
1027 temp = LEFT.br_startoff;
1028 temp2 = LEFT.br_blockcount +
1032 case MASK(LEFT_FILLING):
1034 * Filling in the first part of a previous delayed allocation.
1035 * The left neighbor is not contiguous.
1037 XFS_BMAP_TRACE_PRE_UPDATE("LF", ip, idx, XFS_DATA_FORK);
1038 xfs_bmbt_set_startoff(ep, new_endoff);
1039 temp = PREV.br_blockcount - new->br_blockcount;
1040 xfs_bmbt_set_blockcount(ep, temp);
1041 XFS_BMAP_TRACE_INSERT("LF", ip, idx, 1, new, NULL,
1043 xfs_iext_insert(ifp, idx, 1, new);
1044 ip->i_df.if_lastex = idx;
1045 ip->i_d.di_nextents++;
1047 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1049 rval = XFS_ILOG_CORE;
1050 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1051 new->br_startblock, new->br_blockcount,
1054 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1055 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1056 if ((error = xfs_btree_insert(cur, &i)))
1058 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1060 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1061 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1062 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1063 first, flist, &cur, 1, &tmp_rval,
1069 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1070 startblockval(PREV.br_startblock) -
1071 (cur ? cur->bc_private.b.allocated : 0));
1072 ep = xfs_iext_get_ext(ifp, idx + 1);
1073 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1074 XFS_BMAP_TRACE_POST_UPDATE("LF", ip, idx + 1, XFS_DATA_FORK);
1076 /* DELTA: One in-core extent is split in two. */
1077 temp = PREV.br_startoff;
1078 temp2 = PREV.br_blockcount;
1081 case MASK2(RIGHT_FILLING, RIGHT_CONTIG):
1083 * Filling in the last part of a previous delayed allocation.
1084 * The right neighbor is contiguous with the new allocation.
1086 temp = PREV.br_blockcount - new->br_blockcount;
1087 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx, XFS_DATA_FORK);
1088 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx + 1, XFS_DATA_FORK);
1089 xfs_bmbt_set_blockcount(ep, temp);
1090 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
1091 new->br_startoff, new->br_startblock,
1092 new->br_blockcount + RIGHT.br_blockcount,
1094 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx + 1, XFS_DATA_FORK);
1095 ip->i_df.if_lastex = idx + 1;
1097 rval = XFS_ILOG_DEXT;
1100 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1101 RIGHT.br_startblock,
1102 RIGHT.br_blockcount, &i)))
1104 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1105 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1107 new->br_blockcount +
1108 RIGHT.br_blockcount,
1112 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1113 startblockval(PREV.br_startblock));
1114 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1115 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx, XFS_DATA_FORK);
1117 /* DELTA: The boundary between two in-core extents moved. */
1118 temp = PREV.br_startoff;
1119 temp2 = PREV.br_blockcount +
1120 RIGHT.br_blockcount;
1123 case MASK(RIGHT_FILLING):
1125 * Filling in the last part of a previous delayed allocation.
1126 * The right neighbor is not contiguous.
1128 temp = PREV.br_blockcount - new->br_blockcount;
1129 XFS_BMAP_TRACE_PRE_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1130 xfs_bmbt_set_blockcount(ep, temp);
1131 XFS_BMAP_TRACE_INSERT("RF", ip, idx + 1, 1, new, NULL,
1133 xfs_iext_insert(ifp, idx + 1, 1, new);
1134 ip->i_df.if_lastex = idx + 1;
1135 ip->i_d.di_nextents++;
1137 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1139 rval = XFS_ILOG_CORE;
1140 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1141 new->br_startblock, new->br_blockcount,
1144 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1145 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1146 if ((error = xfs_btree_insert(cur, &i)))
1148 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1150 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1151 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1152 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1153 first, flist, &cur, 1, &tmp_rval,
1159 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1160 startblockval(PREV.br_startblock) -
1161 (cur ? cur->bc_private.b.allocated : 0));
1162 ep = xfs_iext_get_ext(ifp, idx);
1163 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1164 XFS_BMAP_TRACE_POST_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1166 /* DELTA: One in-core extent is split in two. */
1167 temp = PREV.br_startoff;
1168 temp2 = PREV.br_blockcount;
1173 * Filling in the middle part of a previous delayed allocation.
1174 * Contiguity is impossible here.
1175 * This case is avoided almost all the time.
1177 temp = new->br_startoff - PREV.br_startoff;
1178 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, XFS_DATA_FORK);
1179 xfs_bmbt_set_blockcount(ep, temp);
1181 r[1].br_state = PREV.br_state;
1182 r[1].br_startblock = 0;
1183 r[1].br_startoff = new_endoff;
1184 temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
1185 r[1].br_blockcount = temp2;
1186 XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 2, &r[0], &r[1],
1188 xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
1189 ip->i_df.if_lastex = idx + 1;
1190 ip->i_d.di_nextents++;
1192 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1194 rval = XFS_ILOG_CORE;
1195 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1196 new->br_startblock, new->br_blockcount,
1199 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1200 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1201 if ((error = xfs_btree_insert(cur, &i)))
1203 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1205 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1206 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1207 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1208 first, flist, &cur, 1, &tmp_rval,
1214 temp = xfs_bmap_worst_indlen(ip, temp);
1215 temp2 = xfs_bmap_worst_indlen(ip, temp2);
1216 diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
1217 (cur ? cur->bc_private.b.allocated : 0));
1219 xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS, -((int64_t)diff), rsvd)) {
1221 * Ick gross gag me with a spoon.
1223 ASSERT(0); /* want to see if this ever happens! */
1229 !xfs_mod_incore_sb(ip->i_mount,
1230 XFS_SBS_FDBLOCKS, -((int64_t)diff), rsvd))
1237 !xfs_mod_incore_sb(ip->i_mount,
1238 XFS_SBS_FDBLOCKS, -((int64_t)diff), rsvd))
1243 ep = xfs_iext_get_ext(ifp, idx);
1244 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
1245 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, XFS_DATA_FORK);
1246 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx + 2, XFS_DATA_FORK);
1247 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2),
1248 nullstartblock((int)temp2));
1249 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx + 2, XFS_DATA_FORK);
1250 *dnew = temp + temp2;
1251 /* DELTA: One in-core extent is split in three. */
1252 temp = PREV.br_startoff;
1253 temp2 = PREV.br_blockcount;
1256 case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1257 case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1258 case MASK2(LEFT_FILLING, RIGHT_CONTIG):
1259 case MASK2(RIGHT_FILLING, LEFT_CONTIG):
1260 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
1261 case MASK(LEFT_CONTIG):
1262 case MASK(RIGHT_CONTIG):
1264 * These cases are all impossible.
1271 if (delta->xed_startoff > temp)
1272 delta->xed_startoff = temp;
1273 if (delta->xed_blockcount < temp2)
1274 delta->xed_blockcount = temp2;
1288 #undef STATE_SET_TEST
1293 * Called by xfs_bmap_add_extent to handle cases converting an unwritten
1294 * allocation to a real allocation or vice versa.
1296 STATIC int /* error */
1297 xfs_bmap_add_extent_unwritten_real(
1298 xfs_inode_t *ip, /* incore inode pointer */
1299 xfs_extnum_t idx, /* extent number to update/insert */
1300 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
1301 xfs_bmbt_irec_t *new, /* new data to add to file extents */
1302 int *logflagsp, /* inode logging flags */
1303 xfs_extdelta_t *delta) /* Change made to incore extents */
1305 xfs_btree_cur_t *cur; /* btree cursor */
1306 xfs_bmbt_rec_host_t *ep; /* extent entry for idx */
1307 int error; /* error return value */
1308 int i; /* temp state */
1309 xfs_ifork_t *ifp; /* inode fork pointer */
1310 xfs_fileoff_t new_endoff; /* end offset of new entry */
1311 xfs_exntst_t newext; /* new extent state */
1312 xfs_exntst_t oldext; /* old extent state */
1313 xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
1314 /* left is 0, right is 1, prev is 2 */
1315 int rval=0; /* return value (logging flags) */
1316 int state = 0;/* state bits, accessed thru macros */
1317 xfs_filblks_t temp=0;
1318 xfs_filblks_t temp2=0;
1319 enum { /* bit number definitions for state */
1320 LEFT_CONTIG, RIGHT_CONTIG,
1321 LEFT_FILLING, RIGHT_FILLING,
1322 LEFT_DELAY, RIGHT_DELAY,
1323 LEFT_VALID, RIGHT_VALID
1329 #define MASK(b) (1 << (b))
1330 #define MASK2(a,b) (MASK(a) | MASK(b))
1331 #define MASK3(a,b,c) (MASK2(a,b) | MASK(c))
1332 #define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d))
1333 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
1334 #define STATE_TEST(b) (state & MASK(b))
1335 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
1336 ((state &= ~MASK(b)), 0))
1337 #define SWITCH_STATE \
1338 (state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG))
1341 * Set up a bunch of variables to make the tests simpler.
1345 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1346 ep = xfs_iext_get_ext(ifp, idx);
1347 xfs_bmbt_get_all(ep, &PREV);
1348 newext = new->br_state;
1349 oldext = (newext == XFS_EXT_UNWRITTEN) ?
1350 XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
1351 ASSERT(PREV.br_state == oldext);
1352 new_endoff = new->br_startoff + new->br_blockcount;
1353 ASSERT(PREV.br_startoff <= new->br_startoff);
1354 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
1356 * Set flags determining what part of the previous oldext allocation
1357 * extent is being replaced by a newext allocation.
1359 STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff);
1360 STATE_SET(RIGHT_FILLING,
1361 PREV.br_startoff + PREV.br_blockcount == new_endoff);
1363 * Check and set flags if this segment has a left neighbor.
1364 * Don't set contiguous if the combined extent would be too large.
1366 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
1367 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
1368 STATE_SET(LEFT_DELAY, isnullstartblock(LEFT.br_startblock));
1370 STATE_SET(LEFT_CONTIG,
1371 STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
1372 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
1373 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
1374 LEFT.br_state == newext &&
1375 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN);
1377 * Check and set flags if this segment has a right neighbor.
1378 * Don't set contiguous if the combined extent would be too large.
1379 * Also check for all-three-contiguous being too large.
1381 if (STATE_SET_TEST(RIGHT_VALID,
1383 ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) {
1384 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
1385 STATE_SET(RIGHT_DELAY, isnullstartblock(RIGHT.br_startblock));
1387 STATE_SET(RIGHT_CONTIG,
1388 STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
1389 new_endoff == RIGHT.br_startoff &&
1390 new->br_startblock + new->br_blockcount ==
1391 RIGHT.br_startblock &&
1392 newext == RIGHT.br_state &&
1393 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
1394 ((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) !=
1395 MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) ||
1396 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
1399 * Switch out based on the FILLING and CONTIG state bits.
1401 switch (SWITCH_STATE) {
1403 case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1405 * Setting all of a previous oldext extent to newext.
1406 * The left and right neighbors are both contiguous with new.
1408 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC|RC", ip, idx - 1,
1410 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1411 LEFT.br_blockcount + PREV.br_blockcount +
1412 RIGHT.br_blockcount);
1413 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC|RC", ip, idx - 1,
1415 XFS_BMAP_TRACE_DELETE("LF|RF|LC|RC", ip, idx, 2, XFS_DATA_FORK);
1416 xfs_iext_remove(ifp, idx, 2);
1417 ip->i_df.if_lastex = idx - 1;
1418 ip->i_d.di_nextents -= 2;
1420 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1422 rval = XFS_ILOG_CORE;
1423 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1424 RIGHT.br_startblock,
1425 RIGHT.br_blockcount, &i)))
1427 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1428 if ((error = xfs_btree_delete(cur, &i)))
1430 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1431 if ((error = xfs_btree_decrement(cur, 0, &i)))
1433 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1434 if ((error = xfs_btree_delete(cur, &i)))
1436 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1437 if ((error = xfs_btree_decrement(cur, 0, &i)))
1439 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1440 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1442 LEFT.br_blockcount + PREV.br_blockcount +
1443 RIGHT.br_blockcount, LEFT.br_state)))
1446 /* DELTA: Three in-core extents are replaced by one. */
1447 temp = LEFT.br_startoff;
1448 temp2 = LEFT.br_blockcount +
1449 PREV.br_blockcount +
1450 RIGHT.br_blockcount;
1453 case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG):
1455 * Setting all of a previous oldext extent to newext.
1456 * The left neighbor is contiguous, the right is not.
1458 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC", ip, idx - 1,
1460 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1461 LEFT.br_blockcount + PREV.br_blockcount);
1462 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC", ip, idx - 1,
1464 ip->i_df.if_lastex = idx - 1;
1465 XFS_BMAP_TRACE_DELETE("LF|RF|LC", ip, idx, 1, XFS_DATA_FORK);
1466 xfs_iext_remove(ifp, idx, 1);
1467 ip->i_d.di_nextents--;
1469 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1471 rval = XFS_ILOG_CORE;
1472 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1473 PREV.br_startblock, PREV.br_blockcount,
1476 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1477 if ((error = xfs_btree_delete(cur, &i)))
1479 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1480 if ((error = xfs_btree_decrement(cur, 0, &i)))
1482 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1483 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1485 LEFT.br_blockcount + PREV.br_blockcount,
1489 /* DELTA: Two in-core extents are replaced by one. */
1490 temp = LEFT.br_startoff;
1491 temp2 = LEFT.br_blockcount +
1495 case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG):
1497 * Setting all of a previous oldext extent to newext.
1498 * The right neighbor is contiguous, the left is not.
1500 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|RC", ip, idx,
1502 xfs_bmbt_set_blockcount(ep,
1503 PREV.br_blockcount + RIGHT.br_blockcount);
1504 xfs_bmbt_set_state(ep, newext);
1505 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|RC", ip, idx,
1507 ip->i_df.if_lastex = idx;
1508 XFS_BMAP_TRACE_DELETE("LF|RF|RC", ip, idx + 1, 1, XFS_DATA_FORK);
1509 xfs_iext_remove(ifp, idx + 1, 1);
1510 ip->i_d.di_nextents--;
1512 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1514 rval = XFS_ILOG_CORE;
1515 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1516 RIGHT.br_startblock,
1517 RIGHT.br_blockcount, &i)))
1519 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1520 if ((error = xfs_btree_delete(cur, &i)))
1522 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1523 if ((error = xfs_btree_decrement(cur, 0, &i)))
1525 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1526 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1528 new->br_blockcount + RIGHT.br_blockcount,
1532 /* DELTA: Two in-core extents are replaced by one. */
1533 temp = PREV.br_startoff;
1534 temp2 = PREV.br_blockcount +
1535 RIGHT.br_blockcount;
1538 case MASK2(LEFT_FILLING, RIGHT_FILLING):
1540 * Setting all of a previous oldext extent to newext.
1541 * Neither the left nor right neighbors are contiguous with
1544 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF", ip, idx,
1546 xfs_bmbt_set_state(ep, newext);
1547 XFS_BMAP_TRACE_POST_UPDATE("LF|RF", ip, idx,
1549 ip->i_df.if_lastex = idx;
1551 rval = XFS_ILOG_DEXT;
1554 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1555 new->br_startblock, new->br_blockcount,
1558 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1559 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1560 new->br_startblock, new->br_blockcount,
1564 /* DELTA: The in-core extent described by new changed type. */
1565 temp = new->br_startoff;
1566 temp2 = new->br_blockcount;
1569 case MASK2(LEFT_FILLING, LEFT_CONTIG):
1571 * Setting the first part of a previous oldext extent to newext.
1572 * The left neighbor is contiguous.
1574 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx - 1,
1576 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1577 LEFT.br_blockcount + new->br_blockcount);
1578 xfs_bmbt_set_startoff(ep,
1579 PREV.br_startoff + new->br_blockcount);
1580 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx - 1,
1582 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx,
1584 xfs_bmbt_set_startblock(ep,
1585 new->br_startblock + new->br_blockcount);
1586 xfs_bmbt_set_blockcount(ep,
1587 PREV.br_blockcount - new->br_blockcount);
1588 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx,
1590 ip->i_df.if_lastex = idx - 1;
1592 rval = XFS_ILOG_DEXT;
1595 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1596 PREV.br_startblock, PREV.br_blockcount,
1599 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1600 if ((error = xfs_bmbt_update(cur,
1601 PREV.br_startoff + new->br_blockcount,
1602 PREV.br_startblock + new->br_blockcount,
1603 PREV.br_blockcount - new->br_blockcount,
1606 if ((error = xfs_btree_decrement(cur, 0, &i)))
1608 if (xfs_bmbt_update(cur, LEFT.br_startoff,
1610 LEFT.br_blockcount + new->br_blockcount,
1614 /* DELTA: The boundary between two in-core extents moved. */
1615 temp = LEFT.br_startoff;
1616 temp2 = LEFT.br_blockcount +
1620 case MASK(LEFT_FILLING):
1622 * Setting the first part of a previous oldext extent to newext.
1623 * The left neighbor is not contiguous.
1625 XFS_BMAP_TRACE_PRE_UPDATE("LF", ip, idx, XFS_DATA_FORK);
1626 ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
1627 xfs_bmbt_set_startoff(ep, new_endoff);
1628 xfs_bmbt_set_blockcount(ep,
1629 PREV.br_blockcount - new->br_blockcount);
1630 xfs_bmbt_set_startblock(ep,
1631 new->br_startblock + new->br_blockcount);
1632 XFS_BMAP_TRACE_POST_UPDATE("LF", ip, idx, XFS_DATA_FORK);
1633 XFS_BMAP_TRACE_INSERT("LF", ip, idx, 1, new, NULL,
1635 xfs_iext_insert(ifp, idx, 1, new);
1636 ip->i_df.if_lastex = idx;
1637 ip->i_d.di_nextents++;
1639 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1641 rval = XFS_ILOG_CORE;
1642 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1643 PREV.br_startblock, PREV.br_blockcount,
1646 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1647 if ((error = xfs_bmbt_update(cur,
1648 PREV.br_startoff + new->br_blockcount,
1649 PREV.br_startblock + new->br_blockcount,
1650 PREV.br_blockcount - new->br_blockcount,
1653 cur->bc_rec.b = *new;
1654 if ((error = xfs_btree_insert(cur, &i)))
1656 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1658 /* DELTA: One in-core extent is split in two. */
1659 temp = PREV.br_startoff;
1660 temp2 = PREV.br_blockcount;
1663 case MASK2(RIGHT_FILLING, RIGHT_CONTIG):
1665 * Setting the last part of a previous oldext extent to newext.
1666 * The right neighbor is contiguous with the new allocation.
1668 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx,
1670 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx + 1,
1672 xfs_bmbt_set_blockcount(ep,
1673 PREV.br_blockcount - new->br_blockcount);
1674 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx,
1676 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
1677 new->br_startoff, new->br_startblock,
1678 new->br_blockcount + RIGHT.br_blockcount, newext);
1679 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx + 1,
1681 ip->i_df.if_lastex = idx + 1;
1683 rval = XFS_ILOG_DEXT;
1686 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1688 PREV.br_blockcount, &i)))
1690 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1691 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1693 PREV.br_blockcount - new->br_blockcount,
1696 if ((error = xfs_btree_increment(cur, 0, &i)))
1698 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1700 new->br_blockcount + RIGHT.br_blockcount,
1704 /* DELTA: The boundary between two in-core extents moved. */
1705 temp = PREV.br_startoff;
1706 temp2 = PREV.br_blockcount +
1707 RIGHT.br_blockcount;
1710 case MASK(RIGHT_FILLING):
1712 * Setting the last part of a previous oldext extent to newext.
1713 * The right neighbor is not contiguous.
1715 XFS_BMAP_TRACE_PRE_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1716 xfs_bmbt_set_blockcount(ep,
1717 PREV.br_blockcount - new->br_blockcount);
1718 XFS_BMAP_TRACE_POST_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1719 XFS_BMAP_TRACE_INSERT("RF", ip, idx + 1, 1, new, NULL,
1721 xfs_iext_insert(ifp, idx + 1, 1, new);
1722 ip->i_df.if_lastex = idx + 1;
1723 ip->i_d.di_nextents++;
1725 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1727 rval = XFS_ILOG_CORE;
1728 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1729 PREV.br_startblock, PREV.br_blockcount,
1732 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1733 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1735 PREV.br_blockcount - new->br_blockcount,
1738 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1739 new->br_startblock, new->br_blockcount,
1742 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1743 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1744 if ((error = xfs_btree_insert(cur, &i)))
1746 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1748 /* DELTA: One in-core extent is split in two. */
1749 temp = PREV.br_startoff;
1750 temp2 = PREV.br_blockcount;
1755 * Setting the middle part of a previous oldext extent to
1756 * newext. Contiguity is impossible here.
1757 * One extent becomes three extents.
1759 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, XFS_DATA_FORK);
1760 xfs_bmbt_set_blockcount(ep,
1761 new->br_startoff - PREV.br_startoff);
1762 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, XFS_DATA_FORK);
1764 r[1].br_startoff = new_endoff;
1765 r[1].br_blockcount =
1766 PREV.br_startoff + PREV.br_blockcount - new_endoff;
1767 r[1].br_startblock = new->br_startblock + new->br_blockcount;
1768 r[1].br_state = oldext;
1769 XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 2, &r[0], &r[1],
1771 xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
1772 ip->i_df.if_lastex = idx + 1;
1773 ip->i_d.di_nextents += 2;
1775 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1777 rval = XFS_ILOG_CORE;
1778 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1779 PREV.br_startblock, PREV.br_blockcount,
1782 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1783 /* new right extent - oldext */
1784 if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
1785 r[1].br_startblock, r[1].br_blockcount,
1788 /* new left extent - oldext */
1789 cur->bc_rec.b = PREV;
1790 cur->bc_rec.b.br_blockcount =
1791 new->br_startoff - PREV.br_startoff;
1792 if ((error = xfs_btree_insert(cur, &i)))
1794 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1796 * Reset the cursor to the position of the new extent
1797 * we are about to insert as we can't trust it after
1798 * the previous insert.
1800 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1801 new->br_startblock, new->br_blockcount,
1804 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
1805 /* new middle extent - newext */
1806 cur->bc_rec.b.br_state = new->br_state;
1807 if ((error = xfs_btree_insert(cur, &i)))
1809 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
1811 /* DELTA: One in-core extent is split in three. */
1812 temp = PREV.br_startoff;
1813 temp2 = PREV.br_blockcount;
1816 case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1817 case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1818 case MASK2(LEFT_FILLING, RIGHT_CONTIG):
1819 case MASK2(RIGHT_FILLING, LEFT_CONTIG):
1820 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
1821 case MASK(LEFT_CONTIG):
1822 case MASK(RIGHT_CONTIG):
1824 * These cases are all impossible.
1831 if (delta->xed_startoff > temp)
1832 delta->xed_startoff = temp;
1833 if (delta->xed_blockcount < temp2)
1834 delta->xed_blockcount = temp2;
1848 #undef STATE_SET_TEST
1853 * Called by xfs_bmap_add_extent to handle cases converting a hole
1854 * to a delayed allocation.
1857 STATIC int /* error */
1858 xfs_bmap_add_extent_hole_delay(
1859 xfs_inode_t *ip, /* incore inode pointer */
1860 xfs_extnum_t idx, /* extent number to update/insert */
1861 xfs_bmbt_irec_t *new, /* new data to add to file extents */
1862 int *logflagsp, /* inode logging flags */
1863 xfs_extdelta_t *delta, /* Change made to incore extents */
1864 int rsvd) /* OK to allocate reserved blocks */
1866 xfs_bmbt_rec_host_t *ep; /* extent record for idx */
1867 xfs_ifork_t *ifp; /* inode fork pointer */
1868 xfs_bmbt_irec_t left; /* left neighbor extent entry */
1869 xfs_filblks_t newlen=0; /* new indirect size */
1870 xfs_filblks_t oldlen=0; /* old indirect size */
1871 xfs_bmbt_irec_t right; /* right neighbor extent entry */
1872 int state; /* state bits, accessed thru macros */
1873 xfs_filblks_t temp=0; /* temp for indirect calculations */
1874 xfs_filblks_t temp2=0;
1875 enum { /* bit number definitions for state */
1876 LEFT_CONTIG, RIGHT_CONTIG,
1877 LEFT_DELAY, RIGHT_DELAY,
1878 LEFT_VALID, RIGHT_VALID
1881 #define MASK(b) (1 << (b))
1882 #define MASK2(a,b) (MASK(a) | MASK(b))
1883 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
1884 #define STATE_TEST(b) (state & MASK(b))
1885 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
1886 ((state &= ~MASK(b)), 0))
1887 #define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG))
1889 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1890 ep = xfs_iext_get_ext(ifp, idx);
1892 ASSERT(isnullstartblock(new->br_startblock));
1894 * Check and set flags if this segment has a left neighbor
1896 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
1897 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
1898 STATE_SET(LEFT_DELAY, isnullstartblock(left.br_startblock));
1901 * Check and set flags if the current (right) segment exists.
1902 * If it doesn't exist, we're converting the hole at end-of-file.
1904 if (STATE_SET_TEST(RIGHT_VALID,
1906 ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
1907 xfs_bmbt_get_all(ep, &right);
1908 STATE_SET(RIGHT_DELAY, isnullstartblock(right.br_startblock));
1911 * Set contiguity flags on the left and right neighbors.
1912 * Don't let extents get too large, even if the pieces are contiguous.
1914 STATE_SET(LEFT_CONTIG,
1915 STATE_TEST(LEFT_VALID) && STATE_TEST(LEFT_DELAY) &&
1916 left.br_startoff + left.br_blockcount == new->br_startoff &&
1917 left.br_blockcount + new->br_blockcount <= MAXEXTLEN);
1918 STATE_SET(RIGHT_CONTIG,
1919 STATE_TEST(RIGHT_VALID) && STATE_TEST(RIGHT_DELAY) &&
1920 new->br_startoff + new->br_blockcount == right.br_startoff &&
1921 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1922 (!STATE_TEST(LEFT_CONTIG) ||
1923 (left.br_blockcount + new->br_blockcount +
1924 right.br_blockcount <= MAXEXTLEN)));
1926 * Switch out based on the contiguity flags.
1928 switch (SWITCH_STATE) {
1930 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
1932 * New allocation is contiguous with delayed allocations
1933 * on the left and on the right.
1934 * Merge all three into a single extent record.
1936 temp = left.br_blockcount + new->br_blockcount +
1937 right.br_blockcount;
1938 XFS_BMAP_TRACE_PRE_UPDATE("LC|RC", ip, idx - 1,
1940 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
1941 oldlen = startblockval(left.br_startblock) +
1942 startblockval(new->br_startblock) +
1943 startblockval(right.br_startblock);
1944 newlen = xfs_bmap_worst_indlen(ip, temp);
1945 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
1946 nullstartblock((int)newlen));
1947 XFS_BMAP_TRACE_POST_UPDATE("LC|RC", ip, idx - 1,
1949 XFS_BMAP_TRACE_DELETE("LC|RC", ip, idx, 1, XFS_DATA_FORK);
1950 xfs_iext_remove(ifp, idx, 1);
1951 ip->i_df.if_lastex = idx - 1;
1952 /* DELTA: Two in-core extents were replaced by one. */
1954 temp = left.br_startoff;
1957 case MASK(LEFT_CONTIG):
1959 * New allocation is contiguous with a delayed allocation
1961 * Merge the new allocation with the left neighbor.
1963 temp = left.br_blockcount + new->br_blockcount;
1964 XFS_BMAP_TRACE_PRE_UPDATE("LC", ip, idx - 1,
1966 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
1967 oldlen = startblockval(left.br_startblock) +
1968 startblockval(new->br_startblock);
1969 newlen = xfs_bmap_worst_indlen(ip, temp);
1970 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
1971 nullstartblock((int)newlen));
1972 XFS_BMAP_TRACE_POST_UPDATE("LC", ip, idx - 1,
1974 ip->i_df.if_lastex = idx - 1;
1975 /* DELTA: One in-core extent grew into a hole. */
1977 temp = left.br_startoff;
1980 case MASK(RIGHT_CONTIG):
1982 * New allocation is contiguous with a delayed allocation
1984 * Merge the new allocation with the right neighbor.
1986 XFS_BMAP_TRACE_PRE_UPDATE("RC", ip, idx, XFS_DATA_FORK);
1987 temp = new->br_blockcount + right.br_blockcount;
1988 oldlen = startblockval(new->br_startblock) +
1989 startblockval(right.br_startblock);
1990 newlen = xfs_bmap_worst_indlen(ip, temp);
1991 xfs_bmbt_set_allf(ep, new->br_startoff,
1992 nullstartblock((int)newlen), temp, right.br_state);
1993 XFS_BMAP_TRACE_POST_UPDATE("RC", ip, idx, XFS_DATA_FORK);
1994 ip->i_df.if_lastex = idx;
1995 /* DELTA: One in-core extent grew into a hole. */
1997 temp = new->br_startoff;
2002 * New allocation is not contiguous with another
2003 * delayed allocation.
2004 * Insert a new entry.
2006 oldlen = newlen = 0;
2007 XFS_BMAP_TRACE_INSERT("0", ip, idx, 1, new, NULL,
2009 xfs_iext_insert(ifp, idx, 1, new);
2010 ip->i_df.if_lastex = idx;
2011 /* DELTA: A new in-core extent was added in a hole. */
2012 temp2 = new->br_blockcount;
2013 temp = new->br_startoff;
2016 if (oldlen != newlen) {
2017 ASSERT(oldlen > newlen);
2018 xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS,
2019 (int64_t)(oldlen - newlen), rsvd);
2021 * Nothing to do for disk quota accounting here.
2026 if (delta->xed_startoff > temp)
2027 delta->xed_startoff = temp;
2028 if (delta->xed_blockcount < temp2)
2029 delta->xed_blockcount = temp2;
2037 #undef STATE_SET_TEST
2042 * Called by xfs_bmap_add_extent to handle cases converting a hole
2043 * to a real allocation.
2045 STATIC int /* error */
2046 xfs_bmap_add_extent_hole_real(
2047 xfs_inode_t *ip, /* incore inode pointer */
2048 xfs_extnum_t idx, /* extent number to update/insert */
2049 xfs_btree_cur_t *cur, /* if null, not a btree */
2050 xfs_bmbt_irec_t *new, /* new data to add to file extents */
2051 int *logflagsp, /* inode logging flags */
2052 xfs_extdelta_t *delta, /* Change made to incore extents */
2053 int whichfork) /* data or attr fork */
2055 xfs_bmbt_rec_host_t *ep; /* pointer to extent entry ins. point */
2056 int error; /* error return value */
2057 int i; /* temp state */
2058 xfs_ifork_t *ifp; /* inode fork pointer */
2059 xfs_bmbt_irec_t left; /* left neighbor extent entry */
2060 xfs_bmbt_irec_t right; /* right neighbor extent entry */
2061 int rval=0; /* return value (logging flags) */
2062 int state; /* state bits, accessed thru macros */
2063 xfs_filblks_t temp=0;
2064 xfs_filblks_t temp2=0;
2065 enum { /* bit number definitions for state */
2066 LEFT_CONTIG, RIGHT_CONTIG,
2067 LEFT_DELAY, RIGHT_DELAY,
2068 LEFT_VALID, RIGHT_VALID
2071 #define MASK(b) (1 << (b))
2072 #define MASK2(a,b) (MASK(a) | MASK(b))
2073 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
2074 #define STATE_TEST(b) (state & MASK(b))
2075 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
2076 ((state &= ~MASK(b)), 0))
2077 #define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG))
2079 ifp = XFS_IFORK_PTR(ip, whichfork);
2080 ASSERT(idx <= ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t));
2081 ep = xfs_iext_get_ext(ifp, idx);
2084 * Check and set flags if this segment has a left neighbor.
2086 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
2087 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
2088 STATE_SET(LEFT_DELAY, isnullstartblock(left.br_startblock));
2091 * Check and set flags if this segment has a current value.
2092 * Not true if we're inserting into the "hole" at eof.
2094 if (STATE_SET_TEST(RIGHT_VALID,
2096 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
2097 xfs_bmbt_get_all(ep, &right);
2098 STATE_SET(RIGHT_DELAY, isnullstartblock(right.br_startblock));
2101 * We're inserting a real allocation between "left" and "right".
2102 * Set the contiguity flags. Don't let extents get too large.
2104 STATE_SET(LEFT_CONTIG,
2105 STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
2106 left.br_startoff + left.br_blockcount == new->br_startoff &&
2107 left.br_startblock + left.br_blockcount == new->br_startblock &&
2108 left.br_state == new->br_state &&
2109 left.br_blockcount + new->br_blockcount <= MAXEXTLEN);
2110 STATE_SET(RIGHT_CONTIG,
2111 STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
2112 new->br_startoff + new->br_blockcount == right.br_startoff &&
2113 new->br_startblock + new->br_blockcount ==
2114 right.br_startblock &&
2115 new->br_state == right.br_state &&
2116 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
2117 (!STATE_TEST(LEFT_CONTIG) ||
2118 left.br_blockcount + new->br_blockcount +
2119 right.br_blockcount <= MAXEXTLEN));
2123 * Select which case we're in here, and implement it.
2125 switch (SWITCH_STATE) {
2127 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
2129 * New allocation is contiguous with real allocations on the
2130 * left and on the right.
2131 * Merge all three into a single extent record.
2133 XFS_BMAP_TRACE_PRE_UPDATE("LC|RC", ip, idx - 1,
2135 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
2136 left.br_blockcount + new->br_blockcount +
2137 right.br_blockcount);
2138 XFS_BMAP_TRACE_POST_UPDATE("LC|RC", ip, idx - 1,
2140 XFS_BMAP_TRACE_DELETE("LC|RC", ip, idx, 1, whichfork);
2141 xfs_iext_remove(ifp, idx, 1);
2142 ifp->if_lastex = idx - 1;
2143 XFS_IFORK_NEXT_SET(ip, whichfork,
2144 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
2146 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
2148 rval = XFS_ILOG_CORE;
2149 if ((error = xfs_bmbt_lookup_eq(cur,
2151 right.br_startblock,
2152 right.br_blockcount, &i)))
2154 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2155 if ((error = xfs_btree_delete(cur, &i)))
2157 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2158 if ((error = xfs_btree_decrement(cur, 0, &i)))
2160 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2161 if ((error = xfs_bmbt_update(cur, left.br_startoff,
2163 left.br_blockcount +
2164 new->br_blockcount +
2165 right.br_blockcount,
2169 /* DELTA: Two in-core extents were replaced by one. */
2170 temp = left.br_startoff;
2171 temp2 = left.br_blockcount +
2172 new->br_blockcount +
2173 right.br_blockcount;
2176 case MASK(LEFT_CONTIG):
2178 * New allocation is contiguous with a real allocation
2180 * Merge the new allocation with the left neighbor.
2182 XFS_BMAP_TRACE_PRE_UPDATE("LC", ip, idx - 1, whichfork);
2183 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
2184 left.br_blockcount + new->br_blockcount);
2185 XFS_BMAP_TRACE_POST_UPDATE("LC", ip, idx - 1, whichfork);
2186 ifp->if_lastex = idx - 1;
2188 rval = xfs_ilog_fext(whichfork);
2191 if ((error = xfs_bmbt_lookup_eq(cur,
2194 left.br_blockcount, &i)))
2196 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2197 if ((error = xfs_bmbt_update(cur, left.br_startoff,
2199 left.br_blockcount +
2204 /* DELTA: One in-core extent grew. */
2205 temp = left.br_startoff;
2206 temp2 = left.br_blockcount +
2210 case MASK(RIGHT_CONTIG):
2212 * New allocation is contiguous with a real allocation
2214 * Merge the new allocation with the right neighbor.
2216 XFS_BMAP_TRACE_PRE_UPDATE("RC", ip, idx, whichfork);
2217 xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock,
2218 new->br_blockcount + right.br_blockcount,
2220 XFS_BMAP_TRACE_POST_UPDATE("RC", ip, idx, whichfork);
2221 ifp->if_lastex = idx;
2223 rval = xfs_ilog_fext(whichfork);
2226 if ((error = xfs_bmbt_lookup_eq(cur,
2228 right.br_startblock,
2229 right.br_blockcount, &i)))
2231 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2232 if ((error = xfs_bmbt_update(cur, new->br_startoff,
2234 new->br_blockcount +
2235 right.br_blockcount,
2239 /* DELTA: One in-core extent grew. */
2240 temp = new->br_startoff;
2241 temp2 = new->br_blockcount +
2242 right.br_blockcount;
2247 * New allocation is not contiguous with another
2249 * Insert a new entry.
2251 XFS_BMAP_TRACE_INSERT("0", ip, idx, 1, new, NULL, whichfork);
2252 xfs_iext_insert(ifp, idx, 1, new);
2253 ifp->if_lastex = idx;
2254 XFS_IFORK_NEXT_SET(ip, whichfork,
2255 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
2257 rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
2259 rval = XFS_ILOG_CORE;
2260 if ((error = xfs_bmbt_lookup_eq(cur,
2263 new->br_blockcount, &i)))
2265 XFS_WANT_CORRUPTED_GOTO(i == 0, done);
2266 cur->bc_rec.b.br_state = new->br_state;
2267 if ((error = xfs_btree_insert(cur, &i)))
2269 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
2271 /* DELTA: A new extent was added in a hole. */
2272 temp = new->br_startoff;
2273 temp2 = new->br_blockcount;
2278 if (delta->xed_startoff > temp)
2279 delta->xed_startoff = temp;
2280 if (delta->xed_blockcount < temp2)
2281 delta->xed_blockcount = temp2;
2290 #undef STATE_SET_TEST
2295 * Adjust the size of the new extent based on di_extsize and rt extsize.
2298 xfs_bmap_extsize_align(
2300 xfs_bmbt_irec_t *gotp, /* next extent pointer */
2301 xfs_bmbt_irec_t *prevp, /* previous extent pointer */
2302 xfs_extlen_t extsz, /* align to this extent size */
2303 int rt, /* is this a realtime inode? */
2304 int eof, /* is extent at end-of-file? */
2305 int delay, /* creating delalloc extent? */
2306 int convert, /* overwriting unwritten extent? */
2307 xfs_fileoff_t *offp, /* in/out: aligned offset */
2308 xfs_extlen_t *lenp) /* in/out: aligned length */
2310 xfs_fileoff_t orig_off; /* original offset */
2311 xfs_extlen_t orig_alen; /* original length */
2312 xfs_fileoff_t orig_end; /* original off+len */
2313 xfs_fileoff_t nexto; /* next file offset */
2314 xfs_fileoff_t prevo; /* previous file offset */
2315 xfs_fileoff_t align_off; /* temp for offset */
2316 xfs_extlen_t align_alen; /* temp for length */
2317 xfs_extlen_t temp; /* temp for calculations */
2322 orig_off = align_off = *offp;
2323 orig_alen = align_alen = *lenp;
2324 orig_end = orig_off + orig_alen;
2327 * If this request overlaps an existing extent, then don't
2328 * attempt to perform any additional alignment.
2330 if (!delay && !eof &&
2331 (orig_off >= gotp->br_startoff) &&
2332 (orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
2337 * If the file offset is unaligned vs. the extent size
2338 * we need to align it. This will be possible unless
2339 * the file was previously written with a kernel that didn't
2340 * perform this alignment, or if a truncate shot us in the
2343 temp = do_mod(orig_off, extsz);
2349 * Same adjustment for the end of the requested area.
2351 if ((temp = (align_alen % extsz))) {
2352 align_alen += extsz - temp;
2355 * If the previous block overlaps with this proposed allocation
2356 * then move the start forward without adjusting the length.
2358 if (prevp->br_startoff != NULLFILEOFF) {
2359 if (prevp->br_startblock == HOLESTARTBLOCK)
2360 prevo = prevp->br_startoff;
2362 prevo = prevp->br_startoff + prevp->br_blockcount;
2365 if (align_off != orig_off && align_off < prevo)
2368 * If the next block overlaps with this proposed allocation
2369 * then move the start back without adjusting the length,
2370 * but not before offset 0.
2371 * This may of course make the start overlap previous block,
2372 * and if we hit the offset 0 limit then the next block
2373 * can still overlap too.
2375 if (!eof && gotp->br_startoff != NULLFILEOFF) {
2376 if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
2377 (!delay && gotp->br_startblock == DELAYSTARTBLOCK))
2378 nexto = gotp->br_startoff + gotp->br_blockcount;
2380 nexto = gotp->br_startoff;
2382 nexto = NULLFILEOFF;
2384 align_off + align_alen != orig_end &&
2385 align_off + align_alen > nexto)
2386 align_off = nexto > align_alen ? nexto - align_alen : 0;
2388 * If we're now overlapping the next or previous extent that
2389 * means we can't fit an extsz piece in this hole. Just move
2390 * the start forward to the first valid spot and set
2391 * the length so we hit the end.
2393 if (align_off != orig_off && align_off < prevo)
2395 if (align_off + align_alen != orig_end &&
2396 align_off + align_alen > nexto &&
2397 nexto != NULLFILEOFF) {
2398 ASSERT(nexto > prevo);
2399 align_alen = nexto - align_off;
2403 * If realtime, and the result isn't a multiple of the realtime
2404 * extent size we need to remove blocks until it is.
2406 if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
2408 * We're not covering the original request, or
2409 * we won't be able to once we fix the length.
2411 if (orig_off < align_off ||
2412 orig_end > align_off + align_alen ||
2413 align_alen - temp < orig_alen)
2414 return XFS_ERROR(EINVAL);
2416 * Try to fix it by moving the start up.
2418 if (align_off + temp <= orig_off) {
2423 * Try to fix it by moving the end in.
2425 else if (align_off + align_alen - temp >= orig_end)
2428 * Set the start to the minimum then trim the length.
2431 align_alen -= orig_off - align_off;
2432 align_off = orig_off;
2433 align_alen -= align_alen % mp->m_sb.sb_rextsize;
2436 * Result doesn't cover the request, fail it.
2438 if (orig_off < align_off || orig_end > align_off + align_alen)
2439 return XFS_ERROR(EINVAL);
2441 ASSERT(orig_off >= align_off);
2442 ASSERT(orig_end <= align_off + align_alen);
2446 if (!eof && gotp->br_startoff != NULLFILEOFF)
2447 ASSERT(align_off + align_alen <= gotp->br_startoff);
2448 if (prevp->br_startoff != NULLFILEOFF)
2449 ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
2457 #define XFS_ALLOC_GAP_UNITS 4
2461 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2463 xfs_fsblock_t adjust; /* adjustment to block numbers */
2464 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
2465 xfs_mount_t *mp; /* mount point structure */
2466 int nullfb; /* true if ap->firstblock isn't set */
2467 int rt; /* true if inode is realtime */
2469 #define ISVALID(x,y) \
2471 (x) < mp->m_sb.sb_rblocks : \
2472 XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
2473 XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
2474 XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
2476 mp = ap->ip->i_mount;
2477 nullfb = ap->firstblock == NULLFSBLOCK;
2478 rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
2479 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
2481 * If allocating at eof, and there's a previous real block,
2482 * try to use it's last block as our starting point.
2484 if (ap->eof && ap->prevp->br_startoff != NULLFILEOFF &&
2485 !isnullstartblock(ap->prevp->br_startblock) &&
2486 ISVALID(ap->prevp->br_startblock + ap->prevp->br_blockcount,
2487 ap->prevp->br_startblock)) {
2488 ap->rval = ap->prevp->br_startblock + ap->prevp->br_blockcount;
2490 * Adjust for the gap between prevp and us.
2493 (ap->prevp->br_startoff + ap->prevp->br_blockcount);
2495 ISVALID(ap->rval + adjust, ap->prevp->br_startblock))
2499 * If not at eof, then compare the two neighbor blocks.
2500 * Figure out whether either one gives us a good starting point,
2501 * and pick the better one.
2503 else if (!ap->eof) {
2504 xfs_fsblock_t gotbno; /* right side block number */
2505 xfs_fsblock_t gotdiff=0; /* right side difference */
2506 xfs_fsblock_t prevbno; /* left side block number */
2507 xfs_fsblock_t prevdiff=0; /* left side difference */
2510 * If there's a previous (left) block, select a requested
2511 * start block based on it.
2513 if (ap->prevp->br_startoff != NULLFILEOFF &&
2514 !isnullstartblock(ap->prevp->br_startblock) &&
2515 (prevbno = ap->prevp->br_startblock +
2516 ap->prevp->br_blockcount) &&
2517 ISVALID(prevbno, ap->prevp->br_startblock)) {
2519 * Calculate gap to end of previous block.
2521 adjust = prevdiff = ap->off -
2522 (ap->prevp->br_startoff +
2523 ap->prevp->br_blockcount);
2525 * Figure the startblock based on the previous block's
2526 * end and the gap size.
2528 * If the gap is large relative to the piece we're
2529 * allocating, or using it gives us an invalid block
2530 * number, then just use the end of the previous block.
2532 if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
2533 ISVALID(prevbno + prevdiff,
2534 ap->prevp->br_startblock))
2539 * If the firstblock forbids it, can't use it,
2542 if (!rt && !nullfb &&
2543 XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
2544 prevbno = NULLFSBLOCK;
2547 * No previous block or can't follow it, just default.
2550 prevbno = NULLFSBLOCK;
2552 * If there's a following (right) block, select a requested
2553 * start block based on it.
2555 if (!isnullstartblock(ap->gotp->br_startblock)) {
2557 * Calculate gap to start of next block.
2559 adjust = gotdiff = ap->gotp->br_startoff - ap->off;
2561 * Figure the startblock based on the next block's
2562 * start and the gap size.
2564 gotbno = ap->gotp->br_startblock;
2567 * If the gap is large relative to the piece we're
2568 * allocating, or using it gives us an invalid block
2569 * number, then just use the start of the next block
2570 * offset by our length.
2572 if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
2573 ISVALID(gotbno - gotdiff, gotbno))
2575 else if (ISVALID(gotbno - ap->alen, gotbno)) {
2577 gotdiff += adjust - ap->alen;
2581 * If the firstblock forbids it, can't use it,
2584 if (!rt && !nullfb &&
2585 XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
2586 gotbno = NULLFSBLOCK;
2589 * No next block, just default.
2592 gotbno = NULLFSBLOCK;
2594 * If both valid, pick the better one, else the only good
2595 * one, else ap->rval is already set (to 0 or the inode block).
2597 if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
2598 ap->rval = prevdiff <= gotdiff ? prevbno : gotbno;
2599 else if (prevbno != NULLFSBLOCK)
2601 else if (gotbno != NULLFSBLOCK)
2609 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2611 xfs_alloctype_t atype = 0; /* type for allocation routines */
2612 int error; /* error return value */
2613 xfs_mount_t *mp; /* mount point structure */
2614 xfs_extlen_t prod = 0; /* product factor for allocators */
2615 xfs_extlen_t ralen = 0; /* realtime allocation length */
2616 xfs_extlen_t align; /* minimum allocation alignment */
2619 mp = ap->ip->i_mount;
2620 align = xfs_get_extsz_hint(ap->ip);
2621 prod = align / mp->m_sb.sb_rextsize;
2622 error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
2623 align, 1, ap->eof, 0,
2624 ap->conv, &ap->off, &ap->alen);
2628 ASSERT(ap->alen % mp->m_sb.sb_rextsize == 0);
2631 * If the offset & length are not perfectly aligned
2632 * then kill prod, it will just get us in trouble.
2634 if (do_mod(ap->off, align) || ap->alen % align)
2637 * Set ralen to be the actual requested length in rtextents.
2639 ralen = ap->alen / mp->m_sb.sb_rextsize;
2641 * If the old value was close enough to MAXEXTLEN that
2642 * we rounded up to it, cut it back so it's valid again.
2643 * Note that if it's a really large request (bigger than
2644 * MAXEXTLEN), we don't hear about that number, and can't
2645 * adjust the starting point to match it.
2647 if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
2648 ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
2650 * If it's an allocation to an empty file at offset 0,
2651 * pick an extent that will space things out in the rt area.
2653 if (ap->eof && ap->off == 0) {
2654 xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */
2656 error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
2659 ap->rval = rtx * mp->m_sb.sb_rextsize;
2664 xfs_bmap_adjacent(ap);
2667 * Realtime allocation, done through xfs_rtallocate_extent.
2669 atype = ap->rval == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
2670 do_div(ap->rval, mp->m_sb.sb_rextsize);
2673 if ((error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, ap->alen,
2674 &ralen, atype, ap->wasdel, prod, &rtb)))
2676 if (rtb == NULLFSBLOCK && prod > 1 &&
2677 (error = xfs_rtallocate_extent(ap->tp, ap->rval, 1,
2678 ap->alen, &ralen, atype,
2679 ap->wasdel, 1, &rtb)))
2682 if (ap->rval != NULLFSBLOCK) {
2683 ap->rval *= mp->m_sb.sb_rextsize;
2684 ralen *= mp->m_sb.sb_rextsize;
2686 ap->ip->i_d.di_nblocks += ralen;
2687 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2689 ap->ip->i_delayed_blks -= ralen;
2691 * Adjust the disk quota also. This was reserved
2694 XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
2695 ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
2696 XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
2705 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2707 xfs_mount_t *mp; /* mount point structure */
2708 xfs_alloctype_t atype = 0; /* type for allocation routines */
2709 xfs_extlen_t align; /* minimum allocation alignment */
2711 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
2712 xfs_agnumber_t startag;
2713 xfs_alloc_arg_t args;
2715 xfs_extlen_t nextminlen = 0;
2717 int nullfb; /* true if ap->firstblock isn't set */
2723 mp = ap->ip->i_mount;
2724 align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
2725 if (unlikely(align)) {
2726 error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
2727 align, 0, ap->eof, 0, ap->conv,
2728 &ap->off, &ap->alen);
2732 nullfb = ap->firstblock == NULLFSBLOCK;
2733 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
2735 if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
2736 ag = xfs_filestream_lookup_ag(ap->ip);
2737 ag = (ag != NULLAGNUMBER) ? ag : 0;
2738 ap->rval = XFS_AGB_TO_FSB(mp, ag, 0);
2740 ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
2743 ap->rval = ap->firstblock;
2745 xfs_bmap_adjacent(ap);
2748 * If allowed, use ap->rval; otherwise must use firstblock since
2749 * it's in the right allocation group.
2751 if (nullfb || XFS_FSB_TO_AGNO(mp, ap->rval) == fb_agno)
2754 ap->rval = ap->firstblock;
2756 * Normal allocation, done through xfs_alloc_vextent.
2758 tryagain = isaligned = 0;
2761 args.fsbno = ap->rval;
2762 args.maxlen = MIN(ap->alen, mp->m_sb.sb_agblocks);
2763 args.firstblock = ap->firstblock;
2766 if (ap->userdata && xfs_inode_is_filestream(ap->ip))
2767 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2769 args.type = XFS_ALLOCTYPE_START_BNO;
2770 args.total = ap->total;
2773 * Search for an allocation group with a single extent
2774 * large enough for the request.
2776 * If one isn't found, then adjust the minimum allocation
2777 * size to the largest space found.
2779 startag = ag = XFS_FSB_TO_AGNO(mp, args.fsbno);
2780 if (startag == NULLAGNUMBER)
2783 down_read(&mp->m_peraglock);
2784 while (blen < ap->alen) {
2785 pag = &mp->m_perag[ag];
2786 if (!pag->pagf_init &&
2787 (error = xfs_alloc_pagf_init(mp, args.tp,
2788 ag, XFS_ALLOC_FLAG_TRYLOCK))) {
2789 up_read(&mp->m_peraglock);
2793 * See xfs_alloc_fix_freelist...
2795 if (pag->pagf_init) {
2796 xfs_extlen_t longest;
2797 longest = xfs_alloc_longest_free_extent(mp, pag);
2803 if (xfs_inode_is_filestream(ap->ip)) {
2804 if (blen >= ap->alen)
2809 * If startag is an invalid AG, we've
2810 * come here once before and
2811 * xfs_filestream_new_ag picked the
2812 * best currently available.
2814 * Don't continue looping, since we
2815 * could loop forever.
2817 if (startag == NULLAGNUMBER)
2820 error = xfs_filestream_new_ag(ap, &ag);
2822 up_read(&mp->m_peraglock);
2826 /* loop again to set 'blen'*/
2827 startag = NULLAGNUMBER;
2831 if (++ag == mp->m_sb.sb_agcount)
2836 up_read(&mp->m_peraglock);
2838 * Since the above loop did a BUF_TRYLOCK, it is
2839 * possible that there is space for this request.
2841 if (notinit || blen < ap->minlen)
2842 args.minlen = ap->minlen;
2844 * If the best seen length is less than the request
2845 * length, use the best as the minimum.
2847 else if (blen < ap->alen)
2850 * Otherwise we've seen an extent as big as alen,
2851 * use that as the minimum.
2854 args.minlen = ap->alen;
2857 * set the failure fallback case to look in the selected
2858 * AG as the stream may have moved.
2860 if (xfs_inode_is_filestream(ap->ip))
2861 ap->rval = args.fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
2862 } else if (ap->low) {
2863 if (xfs_inode_is_filestream(ap->ip))
2864 args.type = XFS_ALLOCTYPE_FIRST_AG;
2866 args.type = XFS_ALLOCTYPE_START_BNO;
2867 args.total = args.minlen = ap->minlen;
2869 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2870 args.total = ap->total;
2871 args.minlen = ap->minlen;
2873 /* apply extent size hints if obtained earlier */
2874 if (unlikely(align)) {
2876 if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod)))
2877 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2878 } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) {
2882 args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog;
2883 if ((args.mod = (xfs_extlen_t)(do_mod(ap->off, args.prod))))
2884 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2887 * If we are not low on available data blocks, and the
2888 * underlying logical volume manager is a stripe, and
2889 * the file offset is zero then try to allocate data
2890 * blocks on stripe unit boundary.
2891 * NOTE: ap->aeof is only set if the allocation length
2892 * is >= the stripe unit and the allocation offset is
2893 * at the end of file.
2895 if (!ap->low && ap->aeof) {
2897 args.alignment = mp->m_dalign;
2901 * Adjust for alignment
2903 if (blen > args.alignment && blen <= ap->alen)
2904 args.minlen = blen - args.alignment;
2905 args.minalignslop = 0;
2908 * First try an exact bno allocation.
2909 * If it fails then do a near or start bno
2910 * allocation with alignment turned on.
2914 args.type = XFS_ALLOCTYPE_THIS_BNO;
2917 * Compute the minlen+alignment for the
2918 * next case. Set slop so that the value
2919 * of minlen+alignment+slop doesn't go up
2920 * between the calls.
2922 if (blen > mp->m_dalign && blen <= ap->alen)
2923 nextminlen = blen - mp->m_dalign;
2925 nextminlen = args.minlen;
2926 if (nextminlen + mp->m_dalign > args.minlen + 1)
2928 nextminlen + mp->m_dalign -
2931 args.minalignslop = 0;
2935 args.minalignslop = 0;
2937 args.minleft = ap->minleft;
2938 args.wasdel = ap->wasdel;
2940 args.userdata = ap->userdata;
2941 if ((error = xfs_alloc_vextent(&args)))
2943 if (tryagain && args.fsbno == NULLFSBLOCK) {
2945 * Exact allocation failed. Now try with alignment
2949 args.fsbno = ap->rval;
2950 args.alignment = mp->m_dalign;
2951 args.minlen = nextminlen;
2952 args.minalignslop = 0;
2954 if ((error = xfs_alloc_vextent(&args)))
2957 if (isaligned && args.fsbno == NULLFSBLOCK) {
2959 * allocation failed, so turn off alignment and
2963 args.fsbno = ap->rval;
2965 if ((error = xfs_alloc_vextent(&args)))
2968 if (args.fsbno == NULLFSBLOCK && nullfb &&
2969 args.minlen > ap->minlen) {
2970 args.minlen = ap->minlen;
2971 args.type = XFS_ALLOCTYPE_START_BNO;
2972 args.fsbno = ap->rval;
2973 if ((error = xfs_alloc_vextent(&args)))
2976 if (args.fsbno == NULLFSBLOCK && nullfb) {
2978 args.type = XFS_ALLOCTYPE_FIRST_AG;
2979 args.total = ap->minlen;
2981 if ((error = xfs_alloc_vextent(&args)))
2985 if (args.fsbno != NULLFSBLOCK) {
2986 ap->firstblock = ap->rval = args.fsbno;
2987 ASSERT(nullfb || fb_agno == args.agno ||
2988 (ap->low && fb_agno < args.agno));
2989 ap->alen = args.len;
2990 ap->ip->i_d.di_nblocks += args.len;
2991 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2993 ap->ip->i_delayed_blks -= args.len;
2995 * Adjust the disk quota also. This was reserved
2998 XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
2999 ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
3000 XFS_TRANS_DQ_BCOUNT,
3003 ap->rval = NULLFSBLOCK;
3010 * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
3011 * It figures out where to ask the underlying allocator to put the new extent.
3015 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
3017 if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata)
3018 return xfs_bmap_rtalloc(ap);
3019 return xfs_bmap_btalloc(ap);
3023 * Transform a btree format file with only one leaf node, where the
3024 * extents list will fit in the inode, into an extents format file.
3025 * Since the file extents are already in-core, all we have to do is
3026 * give up the space for the btree root and pitch the leaf block.
3028 STATIC int /* error */
3029 xfs_bmap_btree_to_extents(
3030 xfs_trans_t *tp, /* transaction pointer */
3031 xfs_inode_t *ip, /* incore inode pointer */
3032 xfs_btree_cur_t *cur, /* btree cursor */
3033 int *logflagsp, /* inode logging flags */
3034 int whichfork) /* data or attr fork */
3037 struct xfs_btree_block *cblock;/* child btree block */
3038 xfs_fsblock_t cbno; /* child block number */
3039 xfs_buf_t *cbp; /* child block's buffer */
3040 int error; /* error return value */
3041 xfs_ifork_t *ifp; /* inode fork data */
3042 xfs_mount_t *mp; /* mount point structure */
3043 __be64 *pp; /* ptr to block address */
3044 struct xfs_btree_block *rblock;/* root btree block */
3047 ifp = XFS_IFORK_PTR(ip, whichfork);
3048 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
3049 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
3050 rblock = ifp->if_broot;
3051 ASSERT(be16_to_cpu(rblock->bb_level) == 1);
3052 ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
3053 ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1);
3054 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes);
3055 cbno = be64_to_cpu(*pp);
3058 if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
3061 if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
3062 XFS_BMAP_BTREE_REF)))
3064 cblock = XFS_BUF_TO_BLOCK(cbp);
3065 if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
3067 xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
3068 ip->i_d.di_nblocks--;
3069 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
3070 xfs_trans_binval(tp, cbp);
3071 if (cur->bc_bufs[0] == cbp)
3072 cur->bc_bufs[0] = NULL;
3073 xfs_iroot_realloc(ip, -1, whichfork);
3074 ASSERT(ifp->if_broot == NULL);
3075 ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
3076 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3077 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
3082 * Called by xfs_bmapi to update file extent records and the btree
3083 * after removing space (or undoing a delayed allocation).
3085 STATIC int /* error */
3086 xfs_bmap_del_extent(
3087 xfs_inode_t *ip, /* incore inode pointer */
3088 xfs_trans_t *tp, /* current transaction pointer */
3089 xfs_extnum_t idx, /* extent number to update/delete */
3090 xfs_bmap_free_t *flist, /* list of extents to be freed */
3091 xfs_btree_cur_t *cur, /* if null, not a btree */
3092 xfs_bmbt_irec_t *del, /* data to remove from extents */
3093 int *logflagsp, /* inode logging flags */
3094 xfs_extdelta_t *delta, /* Change made to incore extents */
3095 int whichfork, /* data or attr fork */
3096 int rsvd) /* OK to allocate reserved blocks */
3098 xfs_filblks_t da_new; /* new delay-alloc indirect blocks */
3099 xfs_filblks_t da_old; /* old delay-alloc indirect blocks */
3100 xfs_fsblock_t del_endblock=0; /* first block past del */
3101 xfs_fileoff_t del_endoff; /* first offset past del */
3102 int delay; /* current block is delayed allocated */
3103 int do_fx; /* free extent at end of routine */
3104 xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */
3105 int error; /* error return value */
3106 int flags; /* inode logging flags */
3107 xfs_bmbt_irec_t got; /* current extent entry */
3108 xfs_fileoff_t got_endoff; /* first offset past got */
3109 int i; /* temp state */
3110 xfs_ifork_t *ifp; /* inode fork pointer */
3111 xfs_mount_t *mp; /* mount structure */
3112 xfs_filblks_t nblks; /* quota/sb block count */
3113 xfs_bmbt_irec_t new; /* new record to be inserted */
3115 uint qfield; /* quota field to update */
3116 xfs_filblks_t temp; /* for indirect length calculations */
3117 xfs_filblks_t temp2; /* for indirect length calculations */
3119 XFS_STATS_INC(xs_del_exlist);
3121 ifp = XFS_IFORK_PTR(ip, whichfork);
3122 ASSERT((idx >= 0) && (idx < ifp->if_bytes /
3123 (uint)sizeof(xfs_bmbt_rec_t)));
3124 ASSERT(del->br_blockcount > 0);
3125 ep = xfs_iext_get_ext(ifp, idx);
3126 xfs_bmbt_get_all(ep, &got);
3127 ASSERT(got.br_startoff <= del->br_startoff);
3128 del_endoff = del->br_startoff + del->br_blockcount;
3129 got_endoff = got.br_startoff + got.br_blockcount;
3130 ASSERT(got_endoff >= del_endoff);
3131 delay = isnullstartblock(got.br_startblock);
3132 ASSERT(isnullstartblock(del->br_startblock) == delay);
3137 * If deleting a real allocation, must free up the disk space.
3140 flags = XFS_ILOG_CORE;
3142 * Realtime allocation. Free it and record di_nblocks update.
3144 if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) {
3148 ASSERT(do_mod(del->br_blockcount,
3149 mp->m_sb.sb_rextsize) == 0);
3150 ASSERT(do_mod(del->br_startblock,
3151 mp->m_sb.sb_rextsize) == 0);
3152 bno = del->br_startblock;
3153 len = del->br_blockcount;
3154 do_div(bno, mp->m_sb.sb_rextsize);
3155 do_div(len, mp->m_sb.sb_rextsize);
3156 if ((error = xfs_rtfree_extent(ip->i_transp, bno,
3157 (xfs_extlen_t)len)))
3160 nblks = len * mp->m_sb.sb_rextsize;
3161 qfield = XFS_TRANS_DQ_RTBCOUNT;
3164 * Ordinary allocation.
3168 nblks = del->br_blockcount;
3169 qfield = XFS_TRANS_DQ_BCOUNT;
3172 * Set up del_endblock and cur for later.
3174 del_endblock = del->br_startblock + del->br_blockcount;
3176 if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
3177 got.br_startblock, got.br_blockcount,
3180 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3182 da_old = da_new = 0;
3184 da_old = startblockval(got.br_startblock);
3190 * Set flag value to use in switch statement.
3191 * Left-contig is 2, right-contig is 1.
3193 switch (((got.br_startoff == del->br_startoff) << 1) |
3194 (got_endoff == del_endoff)) {
3197 * Matches the whole extent. Delete the entry.
3199 XFS_BMAP_TRACE_DELETE("3", ip, idx, 1, whichfork);
3200 xfs_iext_remove(ifp, idx, 1);
3201 ifp->if_lastex = idx;
3204 XFS_IFORK_NEXT_SET(ip, whichfork,
3205 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
3206 flags |= XFS_ILOG_CORE;
3208 flags |= xfs_ilog_fext(whichfork);
3211 if ((error = xfs_btree_delete(cur, &i)))
3213 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3218 * Deleting the first part of the extent.
3220 XFS_BMAP_TRACE_PRE_UPDATE("2", ip, idx, whichfork);
3221 xfs_bmbt_set_startoff(ep, del_endoff);
3222 temp = got.br_blockcount - del->br_blockcount;
3223 xfs_bmbt_set_blockcount(ep, temp);
3224 ifp->if_lastex = idx;
3226 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
3228 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
3229 XFS_BMAP_TRACE_POST_UPDATE("2", ip, idx,
3234 xfs_bmbt_set_startblock(ep, del_endblock);
3235 XFS_BMAP_TRACE_POST_UPDATE("2", ip, idx, whichfork);
3237 flags |= xfs_ilog_fext(whichfork);
3240 if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
3241 got.br_blockcount - del->br_blockcount,
3248 * Deleting the last part of the extent.
3250 temp = got.br_blockcount - del->br_blockcount;
3251 XFS_BMAP_TRACE_PRE_UPDATE("1", ip, idx, whichfork);
3252 xfs_bmbt_set_blockcount(ep, temp);
3253 ifp->if_lastex = idx;
3255 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
3257 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
3258 XFS_BMAP_TRACE_POST_UPDATE("1", ip, idx,
3263 XFS_BMAP_TRACE_POST_UPDATE("1", ip, idx, whichfork);
3265 flags |= xfs_ilog_fext(whichfork);
3268 if ((error = xfs_bmbt_update(cur, got.br_startoff,
3270 got.br_blockcount - del->br_blockcount,
3277 * Deleting the middle of the extent.
3279 temp = del->br_startoff - got.br_startoff;
3280 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, whichfork);
3281 xfs_bmbt_set_blockcount(ep, temp);
3282 new.br_startoff = del_endoff;
3283 temp2 = got_endoff - del_endoff;
3284 new.br_blockcount = temp2;
3285 new.br_state = got.br_state;
3287 new.br_startblock = del_endblock;
3288 flags |= XFS_ILOG_CORE;
3290 if ((error = xfs_bmbt_update(cur,
3292 got.br_startblock, temp,
3295 if ((error = xfs_btree_increment(cur, 0, &i)))
3297 cur->bc_rec.b = new;
3298 error = xfs_btree_insert(cur, &i);
3299 if (error && error != ENOSPC)
3302 * If get no-space back from btree insert,
3303 * it tried a split, and we have a zero
3304 * block reservation.
3305 * Fix up our state and return the error.
3307 if (error == ENOSPC) {
3309 * Reset the cursor, don't trust
3310 * it after any insert operation.
3312 if ((error = xfs_bmbt_lookup_eq(cur,
3317 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3319 * Update the btree record back
3320 * to the original value.
3322 if ((error = xfs_bmbt_update(cur,
3329 * Reset the extent record back
3330 * to the original value.
3332 xfs_bmbt_set_blockcount(ep,
3335 error = XFS_ERROR(ENOSPC);
3338 XFS_WANT_CORRUPTED_GOTO(i == 1, done);
3340 flags |= xfs_ilog_fext(whichfork);
3341 XFS_IFORK_NEXT_SET(ip, whichfork,
3342 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
3344 ASSERT(whichfork == XFS_DATA_FORK);
3345 temp = xfs_bmap_worst_indlen(ip, temp);
3346 xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
3347 temp2 = xfs_bmap_worst_indlen(ip, temp2);
3348 new.br_startblock = nullstartblock((int)temp2);
3349 da_new = temp + temp2;
3350 while (da_new > da_old) {
3354 xfs_bmbt_set_startblock(ep,
3355 nullstartblock((int)temp));
3357 if (da_new == da_old)
3363 nullstartblock((int)temp2);
3367 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, whichfork);
3368 XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 1, &new, NULL,
3370 xfs_iext_insert(ifp, idx + 1, 1, &new);
3371 ifp->if_lastex = idx + 1;
3375 * If we need to, add to list of extents to delete.
3378 xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
3381 * Adjust inode # blocks in the file.
3384 ip->i_d.di_nblocks -= nblks;
3386 * Adjust quota data.
3389 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, qfield, (long)-nblks);
3392 * Account for change in delayed indirect blocks.
3393 * Nothing to do for disk quota accounting here.
3395 ASSERT(da_old >= da_new);
3396 if (da_old > da_new)
3397 xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, (int64_t)(da_old - da_new),
3400 /* DELTA: report the original extent. */
3401 if (delta->xed_startoff > got.br_startoff)
3402 delta->xed_startoff = got.br_startoff;
3403 if (delta->xed_blockcount < got.br_startoff+got.br_blockcount)
3404 delta->xed_blockcount = got.br_startoff +
3413 * Remove the entry "free" from the free item list. Prev points to the
3414 * previous entry, unless "free" is the head of the list.
3418 xfs_bmap_free_t *flist, /* free item list header */
3419 xfs_bmap_free_item_t *prev, /* previous item on list, if any */
3420 xfs_bmap_free_item_t *free) /* list item to be freed */
3423 prev->xbfi_next = free->xbfi_next;
3425 flist->xbf_first = free->xbfi_next;
3427 kmem_zone_free(xfs_bmap_free_item_zone, free);
3431 * Convert an extents-format file into a btree-format file.
3432 * The new file will have a root block (in the inode) and a single child block.
3434 STATIC int /* error */
3435 xfs_bmap_extents_to_btree(
3436 xfs_trans_t *tp, /* transaction pointer */
3437 xfs_inode_t *ip, /* incore inode pointer */
3438 xfs_fsblock_t *firstblock, /* first-block-allocated */
3439 xfs_bmap_free_t *flist, /* blocks freed in xaction */
3440 xfs_btree_cur_t **curp, /* cursor returned to caller */
3441 int wasdel, /* converting a delayed alloc */
3442 int *logflagsp, /* inode logging flags */
3443 int whichfork) /* data or attr fork */
3445 struct xfs_btree_block *ablock; /* allocated (child) bt block */
3446 xfs_buf_t *abp; /* buffer for ablock */
3447 xfs_alloc_arg_t args; /* allocation arguments */
3448 xfs_bmbt_rec_t *arp; /* child record pointer */
3449 struct xfs_btree_block *block; /* btree root block */
3450 xfs_btree_cur_t *cur; /* bmap btree cursor */
3451 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
3452 int error; /* error return value */
3453 xfs_extnum_t i, cnt; /* extent record index */
3454 xfs_ifork_t *ifp; /* inode fork pointer */
3455 xfs_bmbt_key_t *kp; /* root block key pointer */
3456 xfs_mount_t *mp; /* mount structure */
3457 xfs_extnum_t nextents; /* number of file extents */
3458 xfs_bmbt_ptr_t *pp; /* root block address pointer */
3460 ifp = XFS_IFORK_PTR(ip, whichfork);
3461 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
3462 ASSERT(ifp->if_ext_max ==
3463 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
3465 * Make space in the inode incore.
3467 xfs_iroot_realloc(ip, 1, whichfork);
3468 ifp->if_flags |= XFS_IFBROOT;
3473 block = ifp->if_broot;
3474 block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3475 block->bb_level = cpu_to_be16(1);
3476 block->bb_numrecs = cpu_to_be16(1);
3477 block->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3478 block->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3481 * Need a cursor. Can't allocate until bb_level is filled in.
3484 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
3485 cur->bc_private.b.firstblock = *firstblock;
3486 cur->bc_private.b.flist = flist;
3487 cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
3489 * Convert to a btree with two levels, one record in root.
3491 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
3494 args.firstblock = *firstblock;
3495 if (*firstblock == NULLFSBLOCK) {
3496 args.type = XFS_ALLOCTYPE_START_BNO;
3497 args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
3498 } else if (flist->xbf_low) {
3499 args.type = XFS_ALLOCTYPE_START_BNO;
3500 args.fsbno = *firstblock;
3502 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3503 args.fsbno = *firstblock;
3505 args.minlen = args.maxlen = args.prod = 1;
3506 args.total = args.minleft = args.alignment = args.mod = args.isfl =
3507 args.minalignslop = 0;
3508 args.wasdel = wasdel;
3510 if ((error = xfs_alloc_vextent(&args))) {
3511 xfs_iroot_realloc(ip, -1, whichfork);
3512 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
3516 * Allocation can't fail, the space was reserved.
3518 ASSERT(args.fsbno != NULLFSBLOCK);
3519 ASSERT(*firstblock == NULLFSBLOCK ||
3520 args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
3522 args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
3523 *firstblock = cur->bc_private.b.firstblock = args.fsbno;
3524 cur->bc_private.b.allocated++;
3525 ip->i_d.di_nblocks++;
3526 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
3527 abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
3529 * Fill in the child block.
3531 ablock = XFS_BUF_TO_BLOCK(abp);
3532 ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3533 ablock->bb_level = 0;
3534 ablock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
3535 ablock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
3536 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
3537 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
3538 for (cnt = i = 0; i < nextents; i++) {
3539 ep = xfs_iext_get_ext(ifp, i);
3540 if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
3541 arp->l0 = cpu_to_be64(ep->l0);
3542 arp->l1 = cpu_to_be64(ep->l1);
3546 ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
3547 xfs_btree_set_numrecs(ablock, cnt);
3550 * Fill in the root key and pointer.
3552 kp = XFS_BMBT_KEY_ADDR(mp, block, 1);
3553 arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
3554 kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp));
3555 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur,
3556 be16_to_cpu(block->bb_level)));
3557 *pp = cpu_to_be64(args.fsbno);
3560 * Do all this logging at the end so that
3561 * the root is at the right level.
3563 xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS);
3564 xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
3565 ASSERT(*curp == NULL);
3567 *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork);
3572 * Helper routine to reset inode di_forkoff field when switching
3573 * attribute fork from local to extent format - we reset it where
3574 * possible to make space available for inline data fork extents.
3577 xfs_bmap_forkoff_reset(
3582 if (whichfork == XFS_ATTR_FORK &&
3583 (ip->i_d.di_format != XFS_DINODE_FMT_DEV) &&
3584 (ip->i_d.di_format != XFS_DINODE_FMT_UUID) &&
3585 (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
3586 ((mp->m_attroffset >> 3) > ip->i_d.di_forkoff)) {
3587 ip->i_d.di_forkoff = mp->m_attroffset >> 3;
3588 ip->i_df.if_ext_max = XFS_IFORK_DSIZE(ip) /
3589 (uint)sizeof(xfs_bmbt_rec_t);
3590 ip->i_afp->if_ext_max = XFS_IFORK_ASIZE(ip) /
3591 (uint)sizeof(xfs_bmbt_rec_t);
3596 * Convert a local file to an extents file.
3597 * This code is out of bounds for data forks of regular files,
3598 * since the file data needs to get logged so things will stay consistent.
3599 * (The bmap-level manipulations are ok, though).
3601 STATIC int /* error */
3602 xfs_bmap_local_to_extents(
3603 xfs_trans_t *tp, /* transaction pointer */
3604 xfs_inode_t *ip, /* incore inode pointer */
3605 xfs_fsblock_t *firstblock, /* first block allocated in xaction */
3606 xfs_extlen_t total, /* total blocks needed by transaction */
3607 int *logflagsp, /* inode logging flags */
3608 int whichfork) /* data or attr fork */
3610 int error; /* error return value */
3611 int flags; /* logging flags returned */
3612 xfs_ifork_t *ifp; /* inode fork pointer */
3615 * We don't want to deal with the case of keeping inode data inline yet.
3616 * So sending the data fork of a regular inode is invalid.
3618 ASSERT(!((ip->i_d.di_mode & S_IFMT) == S_IFREG &&
3619 whichfork == XFS_DATA_FORK));
3620 ifp = XFS_IFORK_PTR(ip, whichfork);
3621 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3624 if (ifp->if_bytes) {
3625 xfs_alloc_arg_t args; /* allocation arguments */
3626 xfs_buf_t *bp; /* buffer for extent block */
3627 xfs_bmbt_rec_host_t *ep;/* extent record pointer */
3630 args.mp = ip->i_mount;
3631 args.firstblock = *firstblock;
3632 ASSERT((ifp->if_flags &
3633 (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE);
3635 * Allocate a block. We know we need only one, since the
3636 * file currently fits in an inode.
3638 if (*firstblock == NULLFSBLOCK) {
3639 args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
3640 args.type = XFS_ALLOCTYPE_START_BNO;
3642 args.fsbno = *firstblock;
3643 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3646 args.mod = args.minleft = args.alignment = args.wasdel =
3647 args.isfl = args.minalignslop = 0;
3648 args.minlen = args.maxlen = args.prod = 1;
3649 if ((error = xfs_alloc_vextent(&args)))
3652 * Can't fail, the space was reserved.
3654 ASSERT(args.fsbno != NULLFSBLOCK);
3655 ASSERT(args.len == 1);
3656 *firstblock = args.fsbno;
3657 bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
3658 memcpy((char *)XFS_BUF_PTR(bp), ifp->if_u1.if_data,
3660 xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
3661 xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
3662 xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
3663 xfs_iext_add(ifp, 0, 1);
3664 ep = xfs_iext_get_ext(ifp, 0);
3665 xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
3666 XFS_BMAP_TRACE_POST_UPDATE("new", ip, 0, whichfork);
3667 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
3668 ip->i_d.di_nblocks = 1;
3669 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, tp, ip,
3670 XFS_TRANS_DQ_BCOUNT, 1L);
3671 flags |= xfs_ilog_fext(whichfork);
3673 ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
3674 xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
3676 ifp->if_flags &= ~XFS_IFINLINE;
3677 ifp->if_flags |= XFS_IFEXTENTS;
3678 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3679 flags |= XFS_ILOG_CORE;
3686 * Search the extent records for the entry containing block bno.
3687 * If bno lies in a hole, point to the next entry. If bno lies
3688 * past eof, *eofp will be set, and *prevp will contain the last
3689 * entry (null if none). Else, *lastxp will be set to the index
3690 * of the found entry; *gotp will contain the entry.
3692 xfs_bmbt_rec_host_t * /* pointer to found extent entry */
3693 xfs_bmap_search_multi_extents(
3694 xfs_ifork_t *ifp, /* inode fork pointer */
3695 xfs_fileoff_t bno, /* block number searched for */
3696 int *eofp, /* out: end of file found */
3697 xfs_extnum_t *lastxp, /* out: last extent index */
3698 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
3699 xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
3701 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
3702 xfs_extnum_t lastx; /* last extent index */
3705 * Initialize the extent entry structure to catch access to
3706 * uninitialized br_startblock field.
3708 gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
3709 gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
3710 gotp->br_state = XFS_EXT_INVALID;
3712 gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
3714 gotp->br_startblock = 0xffffa5a5;
3716 prevp->br_startoff = NULLFILEOFF;
3718 ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
3720 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
3722 if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
3723 xfs_bmbt_get_all(ep, gotp);
3737 * Search the extents list for the inode, for the extent containing bno.
3738 * If bno lies in a hole, point to the next entry. If bno lies past eof,
3739 * *eofp will be set, and *prevp will contain the last entry (null if none).
3740 * Else, *lastxp will be set to the index of the found
3741 * entry; *gotp will contain the entry.
3743 STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
3744 xfs_bmap_search_extents(
3745 xfs_inode_t *ip, /* incore inode pointer */
3746 xfs_fileoff_t bno, /* block number searched for */
3747 int fork, /* data or attr fork */
3748 int *eofp, /* out: end of file found */
3749 xfs_extnum_t *lastxp, /* out: last extent index */
3750 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
3751 xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
3753 xfs_ifork_t *ifp; /* inode fork pointer */
3754 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
3756 XFS_STATS_INC(xs_look_exlist);
3757 ifp = XFS_IFORK_PTR(ip, fork);
3759 ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
3761 if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) &&
3762 !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) {
3763 xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount,
3764 "Access to block zero in inode %llu "
3765 "start_block: %llx start_off: %llx "
3766 "blkcnt: %llx extent-state: %x lastx: %x\n",
3767 (unsigned long long)ip->i_ino,
3768 (unsigned long long)gotp->br_startblock,
3769 (unsigned long long)gotp->br_startoff,
3770 (unsigned long long)gotp->br_blockcount,
3771 gotp->br_state, *lastxp);
3772 *lastxp = NULLEXTNUM;
3780 #ifdef XFS_BMAP_TRACE
3781 ktrace_t *xfs_bmap_trace_buf;
3784 * Add a bmap trace buffer entry. Base routine for the others.
3787 xfs_bmap_trace_addentry(
3788 int opcode, /* operation */
3789 const char *fname, /* function name */
3790 char *desc, /* operation description */
3791 xfs_inode_t *ip, /* incore inode pointer */
3792 xfs_extnum_t idx, /* index of entry(ies) */
3793 xfs_extnum_t cnt, /* count of entries, 1 or 2 */
3794 xfs_bmbt_rec_host_t *r1, /* first record */
3795 xfs_bmbt_rec_host_t *r2, /* second record or null */
3796 int whichfork) /* data or attr fork */
3798 xfs_bmbt_rec_host_t tr2;
3800 ASSERT(cnt == 1 || cnt == 2);
3805 memset(&tr2, 0, sizeof(tr2));
3808 ktrace_enter(xfs_bmap_trace_buf,
3809 (void *)(__psint_t)(opcode | (whichfork << 16)),
3810 (void *)fname, (void *)desc, (void *)ip,
3811 (void *)(__psint_t)idx,
3812 (void *)(__psint_t)cnt,
3813 (void *)(__psunsigned_t)(ip->i_ino >> 32),
3814 (void *)(__psunsigned_t)(unsigned)ip->i_ino,
3815 (void *)(__psunsigned_t)(r1->l0 >> 32),
3816 (void *)(__psunsigned_t)(unsigned)(r1->l0),
3817 (void *)(__psunsigned_t)(r1->l1 >> 32),
3818 (void *)(__psunsigned_t)(unsigned)(r1->l1),
3819 (void *)(__psunsigned_t)(r2->l0 >> 32),
3820 (void *)(__psunsigned_t)(unsigned)(r2->l0),
3821 (void *)(__psunsigned_t)(r2->l1 >> 32),
3822 (void *)(__psunsigned_t)(unsigned)(r2->l1)
3824 ASSERT(ip->i_xtrace);
3825 ktrace_enter(ip->i_xtrace,
3826 (void *)(__psint_t)(opcode | (whichfork << 16)),
3827 (void *)fname, (void *)desc, (void *)ip,
3828 (void *)(__psint_t)idx,
3829 (void *)(__psint_t)cnt,
3830 (void *)(__psunsigned_t)(ip->i_ino >> 32),
3831 (void *)(__psunsigned_t)(unsigned)ip->i_ino,
3832 (void *)(__psunsigned_t)(r1->l0 >> 32),
3833 (void *)(__psunsigned_t)(unsigned)(r1->l0),
3834 (void *)(__psunsigned_t)(r1->l1 >> 32),
3835 (void *)(__psunsigned_t)(unsigned)(r1->l1),
3836 (void *)(__psunsigned_t)(r2->l0 >> 32),
3837 (void *)(__psunsigned_t)(unsigned)(r2->l0),
3838 (void *)(__psunsigned_t)(r2->l1 >> 32),
3839 (void *)(__psunsigned_t)(unsigned)(r2->l1)
3844 * Add bmap trace entry prior to a call to xfs_iext_remove.
3847 xfs_bmap_trace_delete(
3848 const char *fname, /* function name */
3849 char *desc, /* operation description */
3850 xfs_inode_t *ip, /* incore inode pointer */
3851 xfs_extnum_t idx, /* index of entry(entries) deleted */
3852 xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */
3853 int whichfork) /* data or attr fork */
3855 xfs_ifork_t *ifp; /* inode fork pointer */
3857 ifp = XFS_IFORK_PTR(ip, whichfork);
3858 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_DELETE, fname, desc, ip, idx,
3859 cnt, xfs_iext_get_ext(ifp, idx),
3860 cnt == 2 ? xfs_iext_get_ext(ifp, idx + 1) : NULL,
3865 * Add bmap trace entry prior to a call to xfs_iext_insert, or
3866 * reading in the extents list from the disk (in the btree).
3869 xfs_bmap_trace_insert(
3870 const char *fname, /* function name */
3871 char *desc, /* operation description */
3872 xfs_inode_t *ip, /* incore inode pointer */
3873 xfs_extnum_t idx, /* index of entry(entries) inserted */
3874 xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */
3875 xfs_bmbt_irec_t *r1, /* inserted record 1 */
3876 xfs_bmbt_irec_t *r2, /* inserted record 2 or null */
3877 int whichfork) /* data or attr fork */
3879 xfs_bmbt_rec_host_t tr1; /* compressed record 1 */
3880 xfs_bmbt_rec_host_t tr2; /* compressed record 2 if needed */
3882 xfs_bmbt_set_all(&tr1, r1);
3885 xfs_bmbt_set_all(&tr2, r2);
3890 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_INSERT, fname, desc, ip, idx,
3891 cnt, &tr1, cnt == 2 ? &tr2 : NULL, whichfork);
3895 * Add bmap trace entry after updating an extent record in place.
3898 xfs_bmap_trace_post_update(
3899 const char *fname, /* function name */
3900 char *desc, /* operation description */
3901 xfs_inode_t *ip, /* incore inode pointer */
3902 xfs_extnum_t idx, /* index of entry updated */
3903 int whichfork) /* data or attr fork */
3905 xfs_ifork_t *ifp; /* inode fork pointer */
3907 ifp = XFS_IFORK_PTR(ip, whichfork);
3908 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_POST_UP, fname, desc, ip, idx,
3909 1, xfs_iext_get_ext(ifp, idx), NULL, whichfork);
3913 * Add bmap trace entry prior to updating an extent record in place.
3916 xfs_bmap_trace_pre_update(
3917 const char *fname, /* function name */
3918 char *desc, /* operation description */
3919 xfs_inode_t *ip, /* incore inode pointer */
3920 xfs_extnum_t idx, /* index of entry to be updated */
3921 int whichfork) /* data or attr fork */
3923 xfs_ifork_t *ifp; /* inode fork pointer */
3925 ifp = XFS_IFORK_PTR(ip, whichfork);
3926 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_PRE_UP, fname, desc, ip, idx, 1,
3927 xfs_iext_get_ext(ifp, idx), NULL, whichfork);
3929 #endif /* XFS_BMAP_TRACE */
3932 * Compute the worst-case number of indirect blocks that will be used
3933 * for ip's delayed extent of length "len".
3935 STATIC xfs_filblks_t
3936 xfs_bmap_worst_indlen(
3937 xfs_inode_t *ip, /* incore inode pointer */
3938 xfs_filblks_t len) /* delayed extent length */
3940 int level; /* btree level number */
3941 int maxrecs; /* maximum record count at this level */
3942 xfs_mount_t *mp; /* mount structure */
3943 xfs_filblks_t rval; /* return value */
3946 maxrecs = mp->m_bmap_dmxr[0];
3947 for (level = 0, rval = 0;
3948 level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
3951 do_div(len, maxrecs);
3954 return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
3957 maxrecs = mp->m_bmap_dmxr[1];
3962 #if defined(XFS_RW_TRACE)
3971 if (ip->i_rwtrace == NULL)
3973 ktrace_enter(ip->i_rwtrace,
3974 (void *)(__psint_t)XFS_BUNMAP,
3976 (void *)(__psint_t)((ip->i_d.di_size >> 32) & 0xffffffff),
3977 (void *)(__psint_t)(ip->i_d.di_size & 0xffffffff),
3978 (void *)(__psint_t)(((xfs_dfiloff_t)bno >> 32) & 0xffffffff),
3979 (void *)(__psint_t)((xfs_dfiloff_t)bno & 0xffffffff),
3980 (void *)(__psint_t)len,
3981 (void *)(__psint_t)flags,
3982 (void *)(unsigned long)current_cpu(),
3994 * Convert inode from non-attributed to attributed.
3995 * Must not be in a transaction, ip must not be locked.
3997 int /* error code */
3998 xfs_bmap_add_attrfork(
3999 xfs_inode_t *ip, /* incore inode pointer */
4000 int size, /* space new attribute needs */
4001 int rsvd) /* xact may use reserved blks */
4003 xfs_fsblock_t firstblock; /* 1st block/ag allocated */
4004 xfs_bmap_free_t flist; /* freed extent records */
4005 xfs_mount_t *mp; /* mount structure */
4006 xfs_trans_t *tp; /* transaction pointer */
4007 int blks; /* space reservation */
4008 int version = 1; /* superblock attr version */
4009 int committed; /* xaction was committed */
4010 int logflags; /* logging flags */
4011 int error; /* error return value */
4013 ASSERT(XFS_IFORK_Q(ip) == 0);
4014 ASSERT(ip->i_df.if_ext_max ==
4015 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
4018 ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
4019 tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
4020 blks = XFS_ADDAFORK_SPACE_RES(mp);
4022 tp->t_flags |= XFS_TRANS_RESERVE;
4023 if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0,
4024 XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
4026 xfs_ilock(ip, XFS_ILOCK_EXCL);
4027 error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, blks, 0, rsvd ?
4028 XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
4029 XFS_QMOPT_RES_REGBLKS);
4031 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4032 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES);
4035 if (XFS_IFORK_Q(ip))
4037 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
4039 * For inodes coming from pre-6.2 filesystems.
4041 ASSERT(ip->i_d.di_aformat == 0);
4042 ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
4044 ASSERT(ip->i_d.di_anextents == 0);
4046 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
4047 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
4048 switch (ip->i_d.di_format) {
4049 case XFS_DINODE_FMT_DEV:
4050 ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
4052 case XFS_DINODE_FMT_UUID:
4053 ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
4055 case XFS_DINODE_FMT_LOCAL:
4056 case XFS_DINODE_FMT_EXTENTS:
4057 case XFS_DINODE_FMT_BTREE:
4058 ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
4059 if (!ip->i_d.di_forkoff)
4060 ip->i_d.di_forkoff = mp->m_attroffset >> 3;
4061 else if (mp->m_flags & XFS_MOUNT_ATTR2)
4066 error = XFS_ERROR(EINVAL);
4069 ip->i_df.if_ext_max =
4070 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
4071 ASSERT(ip->i_afp == NULL);
4072 ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
4073 ip->i_afp->if_ext_max =
4074 XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
4075 ip->i_afp->if_flags = XFS_IFEXTENTS;
4077 xfs_bmap_init(&flist, &firstblock);
4078 switch (ip->i_d.di_format) {
4079 case XFS_DINODE_FMT_LOCAL:
4080 error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
4083 case XFS_DINODE_FMT_EXTENTS:
4084 error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
4087 case XFS_DINODE_FMT_BTREE:
4088 error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
4096 xfs_trans_log_inode(tp, ip, logflags);
4099 if (!xfs_sb_version_hasattr(&mp->m_sb) ||
4100 (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) {
4101 __int64_t sbfields = 0;
4103 spin_lock(&mp->m_sb_lock);
4104 if (!xfs_sb_version_hasattr(&mp->m_sb)) {
4105 xfs_sb_version_addattr(&mp->m_sb);
4106 sbfields |= XFS_SB_VERSIONNUM;
4108 if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) {
4109 xfs_sb_version_addattr2(&mp->m_sb);
4110 sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
4113 spin_unlock(&mp->m_sb_lock);
4114 xfs_mod_sb(tp, sbfields);
4116 spin_unlock(&mp->m_sb_lock);
4118 if ((error = xfs_bmap_finish(&tp, &flist, &committed)))
4120 error = xfs_trans_commit(tp, XFS_TRANS_PERM_LOG_RES);
4121 ASSERT(ip->i_df.if_ext_max ==
4122 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
4125 xfs_bmap_cancel(&flist);
4127 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4129 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
4130 ASSERT(ip->i_df.if_ext_max ==
4131 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
4136 * Add the extent to the list of extents to be free at transaction end.
4137 * The list is maintained sorted (by block number).
4142 xfs_fsblock_t bno, /* fs block number of extent */
4143 xfs_filblks_t len, /* length of extent */
4144 xfs_bmap_free_t *flist, /* list of extents */
4145 xfs_mount_t *mp) /* mount point structure */
4147 xfs_bmap_free_item_t *cur; /* current (next) element */
4148 xfs_bmap_free_item_t *new; /* new element */
4149 xfs_bmap_free_item_t *prev; /* previous element */
4151 xfs_agnumber_t agno;
4152 xfs_agblock_t agbno;
4154 ASSERT(bno != NULLFSBLOCK);
4156 ASSERT(len <= MAXEXTLEN);
4157 ASSERT(!isnullstartblock(bno));
4158 agno = XFS_FSB_TO_AGNO(mp, bno);
4159 agbno = XFS_FSB_TO_AGBNO(mp, bno);
4160 ASSERT(agno < mp->m_sb.sb_agcount);
4161 ASSERT(agbno < mp->m_sb.sb_agblocks);
4162 ASSERT(len < mp->m_sb.sb_agblocks);
4163 ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
4165 ASSERT(xfs_bmap_free_item_zone != NULL);
4166 new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
4167 new->xbfi_startblock = bno;
4168 new->xbfi_blockcount = (xfs_extlen_t)len;
4169 for (prev = NULL, cur = flist->xbf_first;
4171 prev = cur, cur = cur->xbfi_next) {
4172 if (cur->xbfi_startblock >= bno)
4176 prev->xbfi_next = new;
4178 flist->xbf_first = new;
4179 new->xbfi_next = cur;
4184 * Compute and fill in the value of the maximum depth of a bmap btree
4185 * in this filesystem. Done once, during mount.
4188 xfs_bmap_compute_maxlevels(
4189 xfs_mount_t *mp, /* file system mount structure */
4190 int whichfork) /* data or attr fork */
4192 int level; /* btree level */
4193 uint maxblocks; /* max blocks at this level */
4194 uint maxleafents; /* max leaf entries possible */
4195 int maxrootrecs; /* max records in root block */
4196 int minleafrecs; /* min records in leaf block */
4197 int minnoderecs; /* min records in node block */
4198 int sz; /* root block size */
4201 * The maximum number of extents in a file, hence the maximum
4202 * number of leaf entries, is controlled by the type of di_nextents
4203 * (a signed 32-bit number, xfs_extnum_t), or by di_anextents
4204 * (a signed 16-bit number, xfs_aextnum_t).
4206 * Note that we can no longer assume that if we are in ATTR1 that
4207 * the fork offset of all the inodes will be (m_attroffset >> 3)
4208 * because we could have mounted with ATTR2 and then mounted back
4209 * with ATTR1, keeping the di_forkoff's fixed but probably at
4210 * various positions. Therefore, for both ATTR1 and ATTR2
4211 * we have to assume the worst case scenario of a minimum size
4214 if (whichfork == XFS_DATA_FORK) {
4215 maxleafents = MAXEXTNUM;
4216 sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS);
4218 maxleafents = MAXAEXTNUM;
4219 sz = XFS_BMDR_SPACE_CALC(MINABTPTRS);
4221 maxrootrecs = xfs_bmdr_maxrecs(mp, sz, 0);
4222 minleafrecs = mp->m_bmap_dmnr[0];
4223 minnoderecs = mp->m_bmap_dmnr[1];
4224 maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
4225 for (level = 1; maxblocks > 1; level++) {
4226 if (maxblocks <= maxrootrecs)
4229 maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
4231 mp->m_bm_maxlevels[whichfork] = level;
4235 * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
4236 * caller. Frees all the extents that need freeing, which must be done
4237 * last due to locking considerations. We never free any extents in
4238 * the first transaction. This is to allow the caller to make the first
4239 * transaction a synchronous one so that the pointers to the data being
4240 * broken in this transaction will be permanent before the data is actually
4241 * freed. This is necessary to prevent blocks from being reallocated
4242 * and written to before the free and reallocation are actually permanent.
4243 * We do not just make the first transaction synchronous here, because
4244 * there are more efficient ways to gain the same protection in some cases
4245 * (see the file truncation code).
4247 * Return 1 if the given transaction was committed and a new one
4248 * started, and 0 otherwise in the committed parameter.
4253 xfs_trans_t **tp, /* transaction pointer addr */
4254 xfs_bmap_free_t *flist, /* i/o: list extents to free */
4255 int *committed) /* xact committed or not */
4257 xfs_efd_log_item_t *efd; /* extent free data */
4258 xfs_efi_log_item_t *efi; /* extent free intention */
4259 int error; /* error return value */
4260 xfs_bmap_free_item_t *free; /* free extent item */
4261 unsigned int logres; /* new log reservation */
4262 unsigned int logcount; /* new log count */
4263 xfs_mount_t *mp; /* filesystem mount structure */
4264 xfs_bmap_free_item_t *next; /* next item on free list */
4265 xfs_trans_t *ntp; /* new transaction pointer */
4267 ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
4268 if (flist->xbf_count == 0) {
4273 efi = xfs_trans_get_efi(ntp, flist->xbf_count);
4274 for (free = flist->xbf_first; free; free = free->xbfi_next)
4275 xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
4276 free->xbfi_blockcount);
4277 logres = ntp->t_log_res;
4278 logcount = ntp->t_log_count;
4279 ntp = xfs_trans_dup(*tp);
4280 error = xfs_trans_commit(*tp, 0);
4284 * We have a new transaction, so we should return committed=1,
4285 * even though we're returning an error.
4291 * transaction commit worked ok so we can drop the extra ticket
4292 * reference that we gained in xfs_trans_dup()
4294 xfs_log_ticket_put(ntp->t_ticket);
4296 if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES,
4299 efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
4300 for (free = flist->xbf_first; free != NULL; free = next) {
4301 next = free->xbfi_next;
4302 if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
4303 free->xbfi_blockcount))) {
4305 * The bmap free list will be cleaned up at a
4306 * higher level. The EFI will be canceled when
4307 * this transaction is aborted.
4308 * Need to force shutdown here to make sure it
4309 * happens, since this transaction may not be
4313 if (!XFS_FORCED_SHUTDOWN(mp))
4314 xfs_force_shutdown(mp,
4315 (error == EFSCORRUPTED) ?
4316 SHUTDOWN_CORRUPT_INCORE :
4317 SHUTDOWN_META_IO_ERROR);
4320 xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
4321 free->xbfi_blockcount);
4322 xfs_bmap_del_free(flist, NULL, free);
4328 * Free up any items left in the list.
4332 xfs_bmap_free_t *flist) /* list of bmap_free_items */
4334 xfs_bmap_free_item_t *free; /* free list item */
4335 xfs_bmap_free_item_t *next;
4337 if (flist->xbf_count == 0)
4339 ASSERT(flist->xbf_first != NULL);
4340 for (free = flist->xbf_first; free; free = next) {
4341 next = free->xbfi_next;
4342 xfs_bmap_del_free(flist, NULL, free);
4344 ASSERT(flist->xbf_count == 0);
4348 * Returns the file-relative block number of the first unused block(s)
4349 * in the file with at least "len" logically contiguous blocks free.
4350 * This is the lowest-address hole if the file has holes, else the first block
4351 * past the end of file.
4352 * Return 0 if the file is currently local (in-inode).
4355 xfs_bmap_first_unused(
4356 xfs_trans_t *tp, /* transaction pointer */
4357 xfs_inode_t *ip, /* incore inode */
4358 xfs_extlen_t len, /* size of hole to find */
4359 xfs_fileoff_t *first_unused, /* unused block */
4360 int whichfork) /* data or attr fork */
4362 int error; /* error return value */
4363 int idx; /* extent record index */
4364 xfs_ifork_t *ifp; /* inode fork pointer */
4365 xfs_fileoff_t lastaddr; /* last block number seen */
4366 xfs_fileoff_t lowest; /* lowest useful block */
4367 xfs_fileoff_t max; /* starting useful block */
4368 xfs_fileoff_t off; /* offset for this block */
4369 xfs_extnum_t nextents; /* number of extent entries */
4371 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
4372 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
4373 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
4374 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4378 ifp = XFS_IFORK_PTR(ip, whichfork);
4379 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4380 (error = xfs_iread_extents(tp, ip, whichfork)))
4382 lowest = *first_unused;
4383 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4384 for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
4385 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
4386 off = xfs_bmbt_get_startoff(ep);
4388 * See if the hole before this extent will work.
4390 if (off >= lowest + len && off - max >= len) {
4391 *first_unused = max;
4394 lastaddr = off + xfs_bmbt_get_blockcount(ep);
4395 max = XFS_FILEOFF_MAX(lastaddr, lowest);
4397 *first_unused = max;
4402 * Returns the file-relative block number of the last block + 1 before
4403 * last_block (input value) in the file.
4404 * This is not based on i_size, it is based on the extent records.
4405 * Returns 0 for local files, as they do not have extent records.
4408 xfs_bmap_last_before(
4409 xfs_trans_t *tp, /* transaction pointer */
4410 xfs_inode_t *ip, /* incore inode */
4411 xfs_fileoff_t *last_block, /* last block */
4412 int whichfork) /* data or attr fork */
4414 xfs_fileoff_t bno; /* input file offset */
4415 int eof; /* hit end of file */
4416 xfs_bmbt_rec_host_t *ep; /* pointer to last extent */
4417 int error; /* error return value */
4418 xfs_bmbt_irec_t got; /* current extent value */
4419 xfs_ifork_t *ifp; /* inode fork pointer */
4420 xfs_extnum_t lastx; /* last extent used */
4421 xfs_bmbt_irec_t prev; /* previous extent value */
4423 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4424 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4425 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
4426 return XFS_ERROR(EIO);
4427 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4431 ifp = XFS_IFORK_PTR(ip, whichfork);
4432 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4433 (error = xfs_iread_extents(tp, ip, whichfork)))
4435 bno = *last_block - 1;
4436 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4438 if (eof || xfs_bmbt_get_startoff(ep) > bno) {
4439 if (prev.br_startoff == NULLFILEOFF)
4442 *last_block = prev.br_startoff + prev.br_blockcount;
4445 * Otherwise *last_block is already the right answer.
4451 * Returns the file-relative block number of the first block past eof in
4452 * the file. This is not based on i_size, it is based on the extent records.
4453 * Returns 0 for local files, as they do not have extent records.
4456 xfs_bmap_last_offset(
4457 xfs_trans_t *tp, /* transaction pointer */
4458 xfs_inode_t *ip, /* incore inode */
4459 xfs_fileoff_t *last_block, /* last block */
4460 int whichfork) /* data or attr fork */
4462 xfs_bmbt_rec_host_t *ep; /* pointer to last extent */
4463 int error; /* error return value */
4464 xfs_ifork_t *ifp; /* inode fork pointer */
4465 xfs_extnum_t nextents; /* number of extent entries */
4467 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4468 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4469 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
4470 return XFS_ERROR(EIO);
4471 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4475 ifp = XFS_IFORK_PTR(ip, whichfork);
4476 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4477 (error = xfs_iread_extents(tp, ip, whichfork)))
4479 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4484 ep = xfs_iext_get_ext(ifp, nextents - 1);
4485 *last_block = xfs_bmbt_get_startoff(ep) + xfs_bmbt_get_blockcount(ep);
4490 * Returns whether the selected fork of the inode has exactly one
4491 * block or not. For the data fork we check this matches di_size,
4492 * implying the file's range is 0..bsize-1.
4494 int /* 1=>1 block, 0=>otherwise */
4496 xfs_inode_t *ip, /* incore inode */
4497 int whichfork) /* data or attr fork */
4499 xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */
4500 xfs_ifork_t *ifp; /* inode fork pointer */
4501 int rval; /* return value */
4502 xfs_bmbt_irec_t s; /* internal version of extent */
4505 if (whichfork == XFS_DATA_FORK) {
4506 return ((ip->i_d.di_mode & S_IFMT) == S_IFREG) ?
4507 (ip->i_size == ip->i_mount->m_sb.sb_blocksize) :
4508 (ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize);
4511 if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
4513 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4515 ifp = XFS_IFORK_PTR(ip, whichfork);
4516 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
4517 ep = xfs_iext_get_ext(ifp, 0);
4518 xfs_bmbt_get_all(ep, &s);
4519 rval = s.br_startoff == 0 && s.br_blockcount == 1;
4520 if (rval && whichfork == XFS_DATA_FORK)
4521 ASSERT(ip->i_size == ip->i_mount->m_sb.sb_blocksize);
4526 xfs_bmap_sanity_check(
4527 struct xfs_mount *mp,
4531 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
4533 if (be32_to_cpu(block->bb_magic) != XFS_BMAP_MAGIC ||
4534 be16_to_cpu(block->bb_level) != level ||
4535 be16_to_cpu(block->bb_numrecs) == 0 ||
4536 be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0])
4542 * Read in the extents to if_extents.
4543 * All inode fields are set up by caller, we just traverse the btree
4544 * and copy the records in. If the file system cannot contain unwritten
4545 * extents, the records are checked for no "state" flags.
4548 xfs_bmap_read_extents(
4549 xfs_trans_t *tp, /* transaction pointer */
4550 xfs_inode_t *ip, /* incore inode */
4551 int whichfork) /* data or attr fork */
4553 struct xfs_btree_block *block; /* current btree block */
4554 xfs_fsblock_t bno; /* block # of "block" */
4555 xfs_buf_t *bp; /* buffer for "block" */
4556 int error; /* error return value */
4557 xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */
4558 xfs_extnum_t i, j; /* index into the extents list */
4559 xfs_ifork_t *ifp; /* fork structure */
4560 int level; /* btree level, for checking */
4561 xfs_mount_t *mp; /* file system mount structure */
4562 __be64 *pp; /* pointer to block address */
4564 xfs_extnum_t room; /* number of entries there's room for */
4568 ifp = XFS_IFORK_PTR(ip, whichfork);
4569 exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
4570 XFS_EXTFMT_INODE(ip);
4571 block = ifp->if_broot;
4573 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
4575 level = be16_to_cpu(block->bb_level);
4577 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
4578 bno = be64_to_cpu(*pp);
4579 ASSERT(bno != NULLDFSBNO);
4580 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
4581 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
4583 * Go down the tree until leaf level is reached, following the first
4584 * pointer (leftmost) at each level.
4586 while (level-- > 0) {
4587 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4588 XFS_BMAP_BTREE_REF)))
4590 block = XFS_BUF_TO_BLOCK(bp);
4591 XFS_WANT_CORRUPTED_GOTO(
4592 xfs_bmap_sanity_check(mp, bp, level),
4596 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
4597 bno = be64_to_cpu(*pp);
4598 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
4599 xfs_trans_brelse(tp, bp);
4602 * Here with bp and block set to the leftmost leaf node in the tree.
4604 room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4607 * Loop over all leaf nodes. Copy information to the extent records.
4610 xfs_bmbt_rec_t *frp;
4611 xfs_fsblock_t nextbno;
4612 xfs_extnum_t num_recs;
4616 num_recs = xfs_btree_get_numrecs(block);
4617 if (unlikely(i + num_recs > room)) {
4618 ASSERT(i + num_recs <= room);
4619 xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
4620 "corrupt dinode %Lu, (btree extents).",
4621 (unsigned long long) ip->i_ino);
4622 XFS_ERROR_REPORT("xfs_bmap_read_extents(1)",
4627 XFS_WANT_CORRUPTED_GOTO(
4628 xfs_bmap_sanity_check(mp, bp, 0),
4631 * Read-ahead the next leaf block, if any.
4633 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
4634 if (nextbno != NULLFSBLOCK)
4635 xfs_btree_reada_bufl(mp, nextbno, 1);
4637 * Copy records into the extent records.
4639 frp = XFS_BMBT_REC_ADDR(mp, block, 1);
4641 for (j = 0; j < num_recs; j++, i++, frp++) {
4642 xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
4643 trp->l0 = be64_to_cpu(frp->l0);
4644 trp->l1 = be64_to_cpu(frp->l1);
4646 if (exntf == XFS_EXTFMT_NOSTATE) {
4648 * Check all attribute bmap btree records and
4649 * any "older" data bmap btree records for a
4650 * set bit in the "extent flag" position.
4652 if (unlikely(xfs_check_nostate_extents(ifp,
4653 start, num_recs))) {
4654 XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
4660 xfs_trans_brelse(tp, bp);
4663 * If we've reached the end, stop.
4665 if (bno == NULLFSBLOCK)
4667 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4668 XFS_BMAP_BTREE_REF)))
4670 block = XFS_BUF_TO_BLOCK(bp);
4672 ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4673 ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
4674 XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
4677 xfs_trans_brelse(tp, bp);
4678 return XFS_ERROR(EFSCORRUPTED);
4681 #ifdef XFS_BMAP_TRACE
4683 * Add bmap trace insert entries for all the contents of the extent records.
4686 xfs_bmap_trace_exlist(
4687 const char *fname, /* function name */
4688 xfs_inode_t *ip, /* incore inode pointer */
4689 xfs_extnum_t cnt, /* count of entries in the list */
4690 int whichfork) /* data or attr fork */
4692 xfs_bmbt_rec_host_t *ep; /* current extent record */
4693 xfs_extnum_t idx; /* extent record index */
4694 xfs_ifork_t *ifp; /* inode fork pointer */
4695 xfs_bmbt_irec_t s; /* file extent record */
4697 ifp = XFS_IFORK_PTR(ip, whichfork);
4698 ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4699 for (idx = 0; idx < cnt; idx++) {
4700 ep = xfs_iext_get_ext(ifp, idx);
4701 xfs_bmbt_get_all(ep, &s);
4702 XFS_BMAP_TRACE_INSERT("exlist", ip, idx, 1, &s, NULL,
4710 * Validate that the bmbt_irecs being returned from bmapi are valid
4711 * given the callers original parameters. Specifically check the
4712 * ranges of the returned irecs to ensure that they only extent beyond
4713 * the given parameters if the XFS_BMAPI_ENTIRE flag was set.
4716 xfs_bmap_validate_ret(
4720 xfs_bmbt_irec_t *mval,
4724 int i; /* index to map values */
4726 ASSERT(ret_nmap <= nmap);
4728 for (i = 0; i < ret_nmap; i++) {
4729 ASSERT(mval[i].br_blockcount > 0);
4730 if (!(flags & XFS_BMAPI_ENTIRE)) {
4731 ASSERT(mval[i].br_startoff >= bno);
4732 ASSERT(mval[i].br_blockcount <= len);
4733 ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
4736 ASSERT(mval[i].br_startoff < bno + len);
4737 ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
4741 mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
4742 mval[i].br_startoff);
4743 if ((flags & XFS_BMAPI_WRITE) && !(flags & XFS_BMAPI_DELAY))
4744 ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
4745 mval[i].br_startblock != HOLESTARTBLOCK);
4746 ASSERT(mval[i].br_state == XFS_EXT_NORM ||
4747 mval[i].br_state == XFS_EXT_UNWRITTEN);
4754 * Map file blocks to filesystem blocks.
4755 * File range is given by the bno/len pair.
4756 * Adds blocks to file if a write ("flags & XFS_BMAPI_WRITE" set)
4757 * into a hole or past eof.
4758 * Only allocates blocks from a single allocation group,
4759 * to avoid locking problems.
4760 * The returned value in "firstblock" from the first call in a transaction
4761 * must be remembered and presented to subsequent calls in "firstblock".
4762 * An upper bound for the number of blocks to be allocated is supplied to
4763 * the first call in "total"; if no allocation group has that many free
4764 * blocks then the call will fail (return NULLFSBLOCK in "firstblock").
4768 xfs_trans_t *tp, /* transaction pointer */
4769 xfs_inode_t *ip, /* incore inode */
4770 xfs_fileoff_t bno, /* starting file offs. mapped */
4771 xfs_filblks_t len, /* length to map in file */
4772 int flags, /* XFS_BMAPI_... */
4773 xfs_fsblock_t *firstblock, /* first allocated block
4774 controls a.g. for allocs */
4775 xfs_extlen_t total, /* total blocks needed */
4776 xfs_bmbt_irec_t *mval, /* output: map values */
4777 int *nmap, /* i/o: mval size/count */
4778 xfs_bmap_free_t *flist, /* i/o: list extents to free */
4779 xfs_extdelta_t *delta) /* o: change made to incore extents */
4781 xfs_fsblock_t abno; /* allocated block number */
4782 xfs_extlen_t alen; /* allocated extent length */
4783 xfs_fileoff_t aoff; /* allocated file offset */
4784 xfs_bmalloca_t bma; /* args for xfs_bmap_alloc */
4785 xfs_btree_cur_t *cur; /* bmap btree cursor */
4786 xfs_fileoff_t end; /* end of mapped file region */
4787 int eof; /* we've hit the end of extents */
4788 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
4789 int error; /* error return */
4790 xfs_bmbt_irec_t got; /* current file extent record */
4791 xfs_ifork_t *ifp; /* inode fork pointer */
4792 xfs_extlen_t indlen; /* indirect blocks length */
4793 xfs_extnum_t lastx; /* last useful extent number */
4794 int logflags; /* flags for transaction logging */
4795 xfs_extlen_t minleft; /* min blocks left after allocation */
4796 xfs_extlen_t minlen; /* min allocation size */
4797 xfs_mount_t *mp; /* xfs mount structure */
4798 int n; /* current extent index */
4799 int nallocs; /* number of extents alloc\'d */
4800 xfs_extnum_t nextents; /* number of extents in file */
4801 xfs_fileoff_t obno; /* old block number (offset) */
4802 xfs_bmbt_irec_t prev; /* previous file extent record */
4803 int tmp_logflags; /* temp flags holder */
4804 int whichfork; /* data or attr fork */
4805 char inhole; /* current location is hole in file */
4806 char wasdelay; /* old extent was delayed */
4807 char wr; /* this is a write request */
4808 char rt; /* this is a realtime file */
4810 xfs_fileoff_t orig_bno; /* original block number value */
4811 int orig_flags; /* original flags arg value */
4812 xfs_filblks_t orig_len; /* original value of len arg */
4813 xfs_bmbt_irec_t *orig_mval; /* original value of mval */
4814 int orig_nmap; /* original value of *nmap */
4823 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP || !(flags & XFS_BMAPI_WRITE));
4824 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4825 XFS_ATTR_FORK : XFS_DATA_FORK;
4827 if (unlikely(XFS_TEST_ERROR(
4828 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4829 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4830 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL),
4831 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4832 XFS_ERROR_REPORT("xfs_bmapi", XFS_ERRLEVEL_LOW, mp);
4833 return XFS_ERROR(EFSCORRUPTED);
4835 if (XFS_FORCED_SHUTDOWN(mp))
4836 return XFS_ERROR(EIO);
4837 rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
4838 ifp = XFS_IFORK_PTR(ip, whichfork);
4839 ASSERT(ifp->if_ext_max ==
4840 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
4841 if ((wr = (flags & XFS_BMAPI_WRITE)) != 0)
4842 XFS_STATS_INC(xs_blk_mapw);
4844 XFS_STATS_INC(xs_blk_mapr);
4846 * IGSTATE flag is used to combine extents which
4847 * differ only due to the state of the extents.
4848 * This technique is used from xfs_getbmap()
4849 * when the caller does not wish to see the
4850 * separation (which is the default).
4852 * This technique is also used when writing a
4853 * buffer which has been partially written,
4854 * (usually by being flushed during a chunkread),
4855 * to ensure one write takes place. This also
4856 * prevents a change in the xfs inode extents at
4857 * this time, intentionally. This change occurs
4858 * on completion of the write operation, in
4859 * xfs_strat_comp(), where the xfs_bmapi() call
4860 * is transactioned, and the extents combined.
4862 if ((flags & XFS_BMAPI_IGSTATE) && wr) /* if writing unwritten space */
4863 wr = 0; /* no allocations are allowed */
4864 ASSERT(wr || !(flags & XFS_BMAPI_DELAY));
4868 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4870 if ((error = xfs_bmap_local_to_extents(tp, ip,
4871 firstblock, total, &logflags, whichfork)))
4874 if (wr && *firstblock == NULLFSBLOCK) {
4875 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
4876 minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
4881 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4882 (error = xfs_iread_extents(tp, ip, whichfork)))
4884 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4886 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4892 delta->xed_startoff = NULLFILEOFF;
4893 delta->xed_blockcount = 0;
4895 while (bno < end && n < *nmap) {
4897 * Reading past eof, act as though there's a hole
4901 got.br_startoff = end;
4902 inhole = eof || got.br_startoff > bno;
4903 wasdelay = wr && !inhole && !(flags & XFS_BMAPI_DELAY) &&
4904 isnullstartblock(got.br_startblock);
4906 * First, deal with the hole before the allocated space
4907 * that we found, if any.
4909 if (wr && (inhole || wasdelay)) {
4911 * For the wasdelay case, we could also just
4912 * allocate the stuff asked for in this bmap call
4913 * but that wouldn't be as good.
4915 if (wasdelay && !(flags & XFS_BMAPI_EXACT)) {
4916 alen = (xfs_extlen_t)got.br_blockcount;
4917 aoff = got.br_startoff;
4918 if (lastx != NULLEXTNUM && lastx) {
4919 ep = xfs_iext_get_ext(ifp, lastx - 1);
4920 xfs_bmbt_get_all(ep, &prev);
4922 } else if (wasdelay) {
4923 alen = (xfs_extlen_t)
4924 XFS_FILBLKS_MIN(len,
4926 got.br_blockcount) - bno);
4929 alen = (xfs_extlen_t)
4930 XFS_FILBLKS_MIN(len, MAXEXTLEN);
4932 alen = (xfs_extlen_t)
4933 XFS_FILBLKS_MIN(alen,
4934 got.br_startoff - bno);
4937 minlen = (flags & XFS_BMAPI_CONTIG) ? alen : 1;
4938 if (flags & XFS_BMAPI_DELAY) {
4941 /* Figure out the extent size, adjust alen */
4942 extsz = xfs_get_extsz_hint(ip);
4944 error = xfs_bmap_extsize_align(mp,
4947 flags&XFS_BMAPI_DELAY,
4948 flags&XFS_BMAPI_CONVERT,
4954 extsz = alen / mp->m_sb.sb_rextsize;
4957 * Make a transaction-less quota reservation for
4958 * delayed allocation blocks. This number gets
4959 * adjusted later. We return if we haven't
4960 * allocated blocks already inside this loop.
4962 if ((error = XFS_TRANS_RESERVE_QUOTA_NBLKS(
4963 mp, NULL, ip, (long)alen, 0,
4964 rt ? XFS_QMOPT_RES_RTBLKS :
4965 XFS_QMOPT_RES_REGBLKS))) {
4968 ASSERT(cur == NULL);
4975 * Split changing sb for alen and indlen since
4976 * they could be coming from different places.
4978 indlen = (xfs_extlen_t)
4979 xfs_bmap_worst_indlen(ip, alen);
4983 error = xfs_mod_incore_sb(mp,
4985 -((int64_t)extsz), (flags &
4986 XFS_BMAPI_RSVBLOCKS));
4988 error = xfs_mod_incore_sb(mp,
4990 -((int64_t)alen), (flags &
4991 XFS_BMAPI_RSVBLOCKS));
4994 error = xfs_mod_incore_sb(mp,
4996 -((int64_t)indlen), (flags &
4997 XFS_BMAPI_RSVBLOCKS));
4999 xfs_mod_incore_sb(mp,
5001 (int64_t)extsz, (flags &
5002 XFS_BMAPI_RSVBLOCKS));
5004 xfs_mod_incore_sb(mp,
5006 (int64_t)alen, (flags &
5007 XFS_BMAPI_RSVBLOCKS));
5011 if (XFS_IS_QUOTA_ON(mp))
5012 /* unreserve the blocks now */
5014 XFS_TRANS_UNRESERVE_QUOTA_NBLKS(
5017 XFS_QMOPT_RES_RTBLKS :
5018 XFS_QMOPT_RES_REGBLKS);
5022 ip->i_delayed_blks += alen;
5023 abno = nullstartblock(indlen);
5026 * If first time, allocate and fill in
5027 * once-only bma fields.
5029 if (bma.ip == NULL) {
5037 /* Indicate if this is the first user data
5038 * in the file, or just any user data.
5040 if (!(flags & XFS_BMAPI_METADATA)) {
5041 bma.userdata = (aoff == 0) ?
5042 XFS_ALLOC_INITIAL_USER_DATA :
5046 * Fill in changeable bma fields.
5049 bma.firstblock = *firstblock;
5052 bma.conv = !!(flags & XFS_BMAPI_CONVERT);
5053 bma.wasdel = wasdelay;
5054 bma.minlen = minlen;
5055 bma.low = flist->xbf_low;
5056 bma.minleft = minleft;
5058 * Only want to do the alignment at the
5059 * eof if it is userdata and allocation length
5060 * is larger than a stripe unit.
5062 if (mp->m_dalign && alen >= mp->m_dalign &&
5063 (!(flags & XFS_BMAPI_METADATA)) &&
5064 (whichfork == XFS_DATA_FORK)) {
5065 if ((error = xfs_bmap_isaeof(ip, aoff,
5066 whichfork, &bma.aeof)))
5073 if ((error = xfs_bmap_alloc(&bma)))
5076 * Copy out result fields.
5079 if ((flist->xbf_low = bma.low))
5083 ASSERT(*firstblock == NULLFSBLOCK ||
5084 XFS_FSB_TO_AGNO(mp, *firstblock) ==
5085 XFS_FSB_TO_AGNO(mp, bma.firstblock) ||
5087 XFS_FSB_TO_AGNO(mp, *firstblock) <
5088 XFS_FSB_TO_AGNO(mp, bma.firstblock)));
5089 *firstblock = bma.firstblock;
5091 cur->bc_private.b.firstblock =
5093 if (abno == NULLFSBLOCK)
5095 if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
5096 cur = xfs_bmbt_init_cursor(mp, tp,
5098 cur->bc_private.b.firstblock =
5100 cur->bc_private.b.flist = flist;
5103 * Bump the number of extents we've allocated
5109 cur->bc_private.b.flags =
5110 wasdelay ? XFS_BTCUR_BPRV_WASDEL : 0;
5111 got.br_startoff = aoff;
5112 got.br_startblock = abno;
5113 got.br_blockcount = alen;
5114 got.br_state = XFS_EXT_NORM; /* assume normal */
5116 * Determine state of extent, and the filesystem.
5117 * A wasdelay extent has been initialized, so
5118 * shouldn't be flagged as unwritten.
5120 if (wr && xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5121 if (!wasdelay && (flags & XFS_BMAPI_PREALLOC))
5122 got.br_state = XFS_EXT_UNWRITTEN;
5124 error = xfs_bmap_add_extent(ip, lastx, &cur, &got,
5125 firstblock, flist, &tmp_logflags, delta,
5126 whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
5127 logflags |= tmp_logflags;
5130 lastx = ifp->if_lastex;
5131 ep = xfs_iext_get_ext(ifp, lastx);
5132 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5133 xfs_bmbt_get_all(ep, &got);
5134 ASSERT(got.br_startoff <= aoff);
5135 ASSERT(got.br_startoff + got.br_blockcount >=
5138 if (flags & XFS_BMAPI_DELAY) {
5139 ASSERT(isnullstartblock(got.br_startblock));
5140 ASSERT(startblockval(got.br_startblock) > 0);
5142 ASSERT(got.br_state == XFS_EXT_NORM ||
5143 got.br_state == XFS_EXT_UNWRITTEN);
5146 * Fall down into the found allocated space case.
5148 } else if (inhole) {
5150 * Reading in a hole.
5152 mval->br_startoff = bno;
5153 mval->br_startblock = HOLESTARTBLOCK;
5154 mval->br_blockcount =
5155 XFS_FILBLKS_MIN(len, got.br_startoff - bno);
5156 mval->br_state = XFS_EXT_NORM;
5157 bno += mval->br_blockcount;
5158 len -= mval->br_blockcount;
5164 * Then deal with the allocated space we found.
5167 if (!(flags & XFS_BMAPI_ENTIRE) &&
5168 (got.br_startoff + got.br_blockcount > obno)) {
5171 ASSERT((bno >= obno) || (n == 0));
5173 mval->br_startoff = bno;
5174 if (isnullstartblock(got.br_startblock)) {
5175 ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
5176 mval->br_startblock = DELAYSTARTBLOCK;
5178 mval->br_startblock =
5180 (bno - got.br_startoff);
5182 * Return the minimum of what we got and what we
5183 * asked for for the length. We can use the len
5184 * variable here because it is modified below
5185 * and we could have been there before coming
5186 * here if the first part of the allocation
5187 * didn't overlap what was asked for.
5189 mval->br_blockcount =
5190 XFS_FILBLKS_MIN(end - bno, got.br_blockcount -
5191 (bno - got.br_startoff));
5192 mval->br_state = got.br_state;
5193 ASSERT(mval->br_blockcount <= len);
5196 if (isnullstartblock(mval->br_startblock)) {
5197 ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
5198 mval->br_startblock = DELAYSTARTBLOCK;
5203 * Check if writing previously allocated but
5204 * unwritten extents.
5206 if (wr && mval->br_state == XFS_EXT_UNWRITTEN &&
5207 ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_DELAY)) == 0)) {
5209 * Modify (by adding) the state flag, if writing.
5211 ASSERT(mval->br_blockcount <= len);
5212 if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
5213 cur = xfs_bmbt_init_cursor(mp,
5215 cur->bc_private.b.firstblock =
5217 cur->bc_private.b.flist = flist;
5219 mval->br_state = XFS_EXT_NORM;
5220 error = xfs_bmap_add_extent(ip, lastx, &cur, mval,
5221 firstblock, flist, &tmp_logflags, delta,
5222 whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
5223 logflags |= tmp_logflags;
5226 lastx = ifp->if_lastex;
5227 ep = xfs_iext_get_ext(ifp, lastx);
5228 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5229 xfs_bmbt_get_all(ep, &got);
5231 * We may have combined previously unwritten
5232 * space with written space, so generate
5235 if (mval->br_blockcount < len)
5239 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
5240 ((mval->br_startoff + mval->br_blockcount) <= end));
5241 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
5242 (mval->br_blockcount <= len) ||
5243 (mval->br_startoff < obno));
5244 bno = mval->br_startoff + mval->br_blockcount;
5246 if (n > 0 && mval->br_startoff == mval[-1].br_startoff) {
5247 ASSERT(mval->br_startblock == mval[-1].br_startblock);
5248 ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
5249 ASSERT(mval->br_state == mval[-1].br_state);
5250 mval[-1].br_blockcount = mval->br_blockcount;
5251 mval[-1].br_state = mval->br_state;
5252 } else if (n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
5253 mval[-1].br_startblock != DELAYSTARTBLOCK &&
5254 mval[-1].br_startblock != HOLESTARTBLOCK &&
5255 mval->br_startblock ==
5256 mval[-1].br_startblock + mval[-1].br_blockcount &&
5257 ((flags & XFS_BMAPI_IGSTATE) ||
5258 mval[-1].br_state == mval->br_state)) {
5259 ASSERT(mval->br_startoff ==
5260 mval[-1].br_startoff + mval[-1].br_blockcount);
5261 mval[-1].br_blockcount += mval->br_blockcount;
5263 mval->br_startblock == DELAYSTARTBLOCK &&
5264 mval[-1].br_startblock == DELAYSTARTBLOCK &&
5265 mval->br_startoff ==
5266 mval[-1].br_startoff + mval[-1].br_blockcount) {
5267 mval[-1].br_blockcount += mval->br_blockcount;
5268 mval[-1].br_state = mval->br_state;
5269 } else if (!((n == 0) &&
5270 ((mval->br_startoff + mval->br_blockcount) <=
5276 * If we're done, stop now. Stop when we've allocated
5277 * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise
5278 * the transaction may get too big.
5280 if (bno >= end || n >= *nmap || nallocs >= *nmap)
5283 * Else go on to the next record.
5285 ep = xfs_iext_get_ext(ifp, ++lastx);
5287 if (lastx >= nextents)
5290 xfs_bmbt_get_all(ep, &got);
5292 ifp->if_lastex = lastx;
5295 * Transform from btree to extents, give it cur.
5297 if (tp && XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
5298 XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
5300 error = xfs_bmap_btree_to_extents(tp, ip, cur,
5301 &tmp_logflags, whichfork);
5302 logflags |= tmp_logflags;
5306 ASSERT(ifp->if_ext_max ==
5307 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5308 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
5309 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max);
5311 if (delta && delta->xed_startoff != NULLFILEOFF) {
5312 /* A change was actually made.
5313 * Note that delta->xed_blockount is an offset at this
5314 * point and needs to be converted to a block count.
5316 ASSERT(delta->xed_blockcount > delta->xed_startoff);
5317 delta->xed_blockcount -= delta->xed_startoff;
5321 * Log everything. Do this after conversion, there's no point in
5322 * logging the extent records if we've converted to btree format.
5324 if ((logflags & xfs_ilog_fext(whichfork)) &&
5325 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
5326 logflags &= ~xfs_ilog_fext(whichfork);
5327 else if ((logflags & xfs_ilog_fbroot(whichfork)) &&
5328 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
5329 logflags &= ~xfs_ilog_fbroot(whichfork);
5331 * Log whatever the flags say, even if error. Otherwise we might miss
5332 * detecting a case where the data is changed, there's an error,
5333 * and it's not logged so we don't shutdown when we should.
5337 xfs_trans_log_inode(tp, ip, logflags);
5341 ASSERT(*firstblock == NULLFSBLOCK ||
5342 XFS_FSB_TO_AGNO(mp, *firstblock) ==
5344 cur->bc_private.b.firstblock) ||
5346 XFS_FSB_TO_AGNO(mp, *firstblock) <
5348 cur->bc_private.b.firstblock)));
5349 *firstblock = cur->bc_private.b.firstblock;
5351 xfs_btree_del_cursor(cur,
5352 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5355 xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
5361 * Map file blocks to filesystem blocks, simple version.
5362 * One block (extent) only, read-only.
5363 * For flags, only the XFS_BMAPI_ATTRFORK flag is examined.
5364 * For the other flag values, the effect is as if XFS_BMAPI_METADATA
5365 * was set and all the others were clear.
5369 xfs_trans_t *tp, /* transaction pointer */
5370 xfs_inode_t *ip, /* incore inode */
5371 int whichfork, /* data or attr fork */
5372 xfs_fsblock_t *fsb, /* output: mapped block */
5373 xfs_fileoff_t bno) /* starting file offs. mapped */
5375 int eof; /* we've hit the end of extents */
5376 int error; /* error return */
5377 xfs_bmbt_irec_t got; /* current file extent record */
5378 xfs_ifork_t *ifp; /* inode fork pointer */
5379 xfs_extnum_t lastx; /* last useful extent number */
5380 xfs_bmbt_irec_t prev; /* previous file extent record */
5382 ifp = XFS_IFORK_PTR(ip, whichfork);
5384 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
5385 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)) {
5386 XFS_ERROR_REPORT("xfs_bmapi_single", XFS_ERRLEVEL_LOW,
5388 return XFS_ERROR(EFSCORRUPTED);
5390 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
5391 return XFS_ERROR(EIO);
5392 XFS_STATS_INC(xs_blk_mapr);
5393 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5394 (error = xfs_iread_extents(tp, ip, whichfork)))
5396 (void)xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5399 * Reading past eof, act as though there's a hole
5402 if (eof || got.br_startoff > bno) {
5406 ASSERT(!isnullstartblock(got.br_startblock));
5407 ASSERT(bno < got.br_startoff + got.br_blockcount);
5408 *fsb = got.br_startblock + (bno - got.br_startoff);
5409 ifp->if_lastex = lastx;
5414 * Unmap (remove) blocks from a file.
5415 * If nexts is nonzero then the number of extents to remove is limited to
5416 * that value. If not all extents in the block range can be removed then
5421 xfs_trans_t *tp, /* transaction pointer */
5422 struct xfs_inode *ip, /* incore inode */
5423 xfs_fileoff_t bno, /* starting offset to unmap */
5424 xfs_filblks_t len, /* length to unmap in file */
5425 int flags, /* misc flags */
5426 xfs_extnum_t nexts, /* number of extents max */
5427 xfs_fsblock_t *firstblock, /* first allocated block
5428 controls a.g. for allocs */
5429 xfs_bmap_free_t *flist, /* i/o: list extents to free */
5430 xfs_extdelta_t *delta, /* o: change made to incore
5432 int *done) /* set if not done yet */
5434 xfs_btree_cur_t *cur; /* bmap btree cursor */
5435 xfs_bmbt_irec_t del; /* extent being deleted */
5436 int eof; /* is deleting at eof */
5437 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
5438 int error; /* error return value */
5439 xfs_extnum_t extno; /* extent number in list */
5440 xfs_bmbt_irec_t got; /* current extent record */
5441 xfs_ifork_t *ifp; /* inode fork pointer */
5442 int isrt; /* freeing in rt area */
5443 xfs_extnum_t lastx; /* last extent index used */
5444 int logflags; /* transaction logging flags */
5445 xfs_extlen_t mod; /* rt extent offset */
5446 xfs_mount_t *mp; /* mount structure */
5447 xfs_extnum_t nextents; /* number of file extents */
5448 xfs_bmbt_irec_t prev; /* previous extent record */
5449 xfs_fileoff_t start; /* first file offset deleted */
5450 int tmp_logflags; /* partial logging flags */
5451 int wasdel; /* was a delayed alloc extent */
5452 int whichfork; /* data or attribute fork */
5453 int rsvd; /* OK to allocate reserved blocks */
5456 xfs_bunmap_trace(ip, bno, len, flags, (inst_t *)__return_address);
5457 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
5458 XFS_ATTR_FORK : XFS_DATA_FORK;
5459 ifp = XFS_IFORK_PTR(ip, whichfork);
5461 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
5462 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
5463 XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
5465 return XFS_ERROR(EFSCORRUPTED);
5468 if (XFS_FORCED_SHUTDOWN(mp))
5469 return XFS_ERROR(EIO);
5470 rsvd = (flags & XFS_BMAPI_RSVBLOCKS) != 0;
5473 ASSERT(ifp->if_ext_max ==
5474 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5475 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5476 (error = xfs_iread_extents(tp, ip, whichfork)))
5478 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5479 if (nextents == 0) {
5483 XFS_STATS_INC(xs_blk_unmap);
5484 isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
5486 bno = start + len - 1;
5487 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5490 delta->xed_startoff = NULLFILEOFF;
5491 delta->xed_blockcount = 0;
5494 * Check to see if the given block number is past the end of the
5495 * file, back up to the last block if so...
5498 ep = xfs_iext_get_ext(ifp, --lastx);
5499 xfs_bmbt_get_all(ep, &got);
5500 bno = got.br_startoff + got.br_blockcount - 1;
5503 if (ifp->if_flags & XFS_IFBROOT) {
5504 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
5505 cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork);
5506 cur->bc_private.b.firstblock = *firstblock;
5507 cur->bc_private.b.flist = flist;
5508 cur->bc_private.b.flags = 0;
5512 while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 &&
5513 (nexts == 0 || extno < nexts)) {
5515 * Is the found extent after a hole in which bno lives?
5516 * Just back up to the previous extent, if so.
5518 if (got.br_startoff > bno) {
5521 ep = xfs_iext_get_ext(ifp, lastx);
5522 xfs_bmbt_get_all(ep, &got);
5525 * Is the last block of this extent before the range
5526 * we're supposed to delete? If so, we're done.
5528 bno = XFS_FILEOFF_MIN(bno,
5529 got.br_startoff + got.br_blockcount - 1);
5533 * Then deal with the (possibly delayed) allocated space
5538 wasdel = isnullstartblock(del.br_startblock);
5539 if (got.br_startoff < start) {
5540 del.br_startoff = start;
5541 del.br_blockcount -= start - got.br_startoff;
5543 del.br_startblock += start - got.br_startoff;
5545 if (del.br_startoff + del.br_blockcount > bno + 1)
5546 del.br_blockcount = bno + 1 - del.br_startoff;
5547 sum = del.br_startblock + del.br_blockcount;
5549 (mod = do_mod(sum, mp->m_sb.sb_rextsize))) {
5551 * Realtime extent not lined up at the end.
5552 * The extent could have been split into written
5553 * and unwritten pieces, or we could just be
5554 * unmapping part of it. But we can't really
5555 * get rid of part of a realtime extent.
5557 if (del.br_state == XFS_EXT_UNWRITTEN ||
5558 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5560 * This piece is unwritten, or we're not
5561 * using unwritten extents. Skip over it.
5564 bno -= mod > del.br_blockcount ?
5565 del.br_blockcount : mod;
5566 if (bno < got.br_startoff) {
5568 xfs_bmbt_get_all(xfs_iext_get_ext(
5574 * It's written, turn it unwritten.
5575 * This is better than zeroing it.
5577 ASSERT(del.br_state == XFS_EXT_NORM);
5578 ASSERT(xfs_trans_get_block_res(tp) > 0);
5580 * If this spans a realtime extent boundary,
5581 * chop it back to the start of the one we end at.
5583 if (del.br_blockcount > mod) {
5584 del.br_startoff += del.br_blockcount - mod;
5585 del.br_startblock += del.br_blockcount - mod;
5586 del.br_blockcount = mod;
5588 del.br_state = XFS_EXT_UNWRITTEN;
5589 error = xfs_bmap_add_extent(ip, lastx, &cur, &del,
5590 firstblock, flist, &logflags, delta,
5596 if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) {
5598 * Realtime extent is lined up at the end but not
5599 * at the front. We'll get rid of full extents if
5602 mod = mp->m_sb.sb_rextsize - mod;
5603 if (del.br_blockcount > mod) {
5604 del.br_blockcount -= mod;
5605 del.br_startoff += mod;
5606 del.br_startblock += mod;
5607 } else if ((del.br_startoff == start &&
5608 (del.br_state == XFS_EXT_UNWRITTEN ||
5609 xfs_trans_get_block_res(tp) == 0)) ||
5610 !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
5612 * Can't make it unwritten. There isn't
5613 * a full extent here so just skip it.
5615 ASSERT(bno >= del.br_blockcount);
5616 bno -= del.br_blockcount;
5617 if (bno < got.br_startoff) {
5619 xfs_bmbt_get_all(--ep, &got);
5622 } else if (del.br_state == XFS_EXT_UNWRITTEN) {
5624 * This one is already unwritten.
5625 * It must have a written left neighbor.
5626 * Unwrite the killed part of that one and
5630 xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
5632 ASSERT(prev.br_state == XFS_EXT_NORM);
5633 ASSERT(!isnullstartblock(prev.br_startblock));
5634 ASSERT(del.br_startblock ==
5635 prev.br_startblock + prev.br_blockcount);
5636 if (prev.br_startoff < start) {
5637 mod = start - prev.br_startoff;
5638 prev.br_blockcount -= mod;
5639 prev.br_startblock += mod;
5640 prev.br_startoff = start;
5642 prev.br_state = XFS_EXT_UNWRITTEN;
5643 error = xfs_bmap_add_extent(ip, lastx - 1, &cur,
5644 &prev, firstblock, flist, &logflags,
5645 delta, XFS_DATA_FORK, 0);
5650 ASSERT(del.br_state == XFS_EXT_NORM);
5651 del.br_state = XFS_EXT_UNWRITTEN;
5652 error = xfs_bmap_add_extent(ip, lastx, &cur,
5653 &del, firstblock, flist, &logflags,
5654 delta, XFS_DATA_FORK, 0);
5661 ASSERT(startblockval(del.br_startblock) > 0);
5662 /* Update realtime/data freespace, unreserve quota */
5664 xfs_filblks_t rtexts;
5666 rtexts = XFS_FSB_TO_B(mp, del.br_blockcount);
5667 do_div(rtexts, mp->m_sb.sb_rextsize);
5668 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
5669 (int64_t)rtexts, rsvd);
5670 (void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
5671 NULL, ip, -((long)del.br_blockcount), 0,
5672 XFS_QMOPT_RES_RTBLKS);
5674 xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS,
5675 (int64_t)del.br_blockcount, rsvd);
5676 (void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
5677 NULL, ip, -((long)del.br_blockcount), 0,
5678 XFS_QMOPT_RES_REGBLKS);
5680 ip->i_delayed_blks -= del.br_blockcount;
5682 cur->bc_private.b.flags |=
5683 XFS_BTCUR_BPRV_WASDEL;
5685 cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
5687 * If it's the case where the directory code is running
5688 * with no block reservation, and the deleted block is in
5689 * the middle of its extent, and the resulting insert
5690 * of an extent would cause transformation to btree format,
5691 * then reject it. The calling code will then swap
5692 * blocks around instead.
5693 * We have to do this now, rather than waiting for the
5694 * conversion to btree format, since the transaction
5697 if (!wasdel && xfs_trans_get_block_res(tp) == 0 &&
5698 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5699 XFS_IFORK_NEXTENTS(ip, whichfork) >= ifp->if_ext_max &&
5700 del.br_startoff > got.br_startoff &&
5701 del.br_startoff + del.br_blockcount <
5702 got.br_startoff + got.br_blockcount) {
5703 error = XFS_ERROR(ENOSPC);
5706 error = xfs_bmap_del_extent(ip, tp, lastx, flist, cur, &del,
5707 &tmp_logflags, delta, whichfork, rsvd);
5708 logflags |= tmp_logflags;
5711 bno = del.br_startoff - 1;
5713 lastx = ifp->if_lastex;
5715 * If not done go on to the next (previous) record.
5716 * Reset ep in case the extents array was re-alloced.
5718 ep = xfs_iext_get_ext(ifp, lastx);
5719 if (bno != (xfs_fileoff_t)-1 && bno >= start) {
5720 if (lastx >= XFS_IFORK_NEXTENTS(ip, whichfork) ||
5721 xfs_bmbt_get_startoff(ep) > bno) {
5723 ep = xfs_iext_get_ext(ifp, lastx);
5726 xfs_bmbt_get_all(ep, &got);
5730 ifp->if_lastex = lastx;
5731 *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0;
5732 ASSERT(ifp->if_ext_max ==
5733 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5735 * Convert to a btree if necessary.
5737 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5738 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
5739 ASSERT(cur == NULL);
5740 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist,
5741 &cur, 0, &tmp_logflags, whichfork);
5742 logflags |= tmp_logflags;
5747 * transform from btree to extents, give it cur
5749 else if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
5750 XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
5751 ASSERT(cur != NULL);
5752 error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
5754 logflags |= tmp_logflags;
5759 * transform from extents to local?
5761 ASSERT(ifp->if_ext_max ==
5762 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5764 if (delta && delta->xed_startoff != NULLFILEOFF) {
5765 /* A change was actually made.
5766 * Note that delta->xed_blockount is an offset at this
5767 * point and needs to be converted to a block count.
5769 ASSERT(delta->xed_blockcount > delta->xed_startoff);
5770 delta->xed_blockcount -= delta->xed_startoff;
5774 * Log everything. Do this after conversion, there's no point in
5775 * logging the extent records if we've converted to btree format.
5777 if ((logflags & xfs_ilog_fext(whichfork)) &&
5778 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
5779 logflags &= ~xfs_ilog_fext(whichfork);
5780 else if ((logflags & xfs_ilog_fbroot(whichfork)) &&
5781 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
5782 logflags &= ~xfs_ilog_fbroot(whichfork);
5784 * Log inode even in the error case, if the transaction
5785 * is dirty we'll need to shut down the filesystem.
5788 xfs_trans_log_inode(tp, ip, logflags);
5791 *firstblock = cur->bc_private.b.firstblock;
5792 cur->bc_private.b.allocated = 0;
5794 xfs_btree_del_cursor(cur,
5795 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5801 * returns 1 for success, 0 if we failed to map the extent.
5804 xfs_getbmapx_fix_eof_hole(
5805 xfs_inode_t *ip, /* xfs incore inode pointer */
5806 struct getbmapx *out, /* output structure */
5807 int prealloced, /* this is a file with
5808 * preallocated data space */
5809 __int64_t end, /* last block requested */
5810 xfs_fsblock_t startblock)
5813 xfs_mount_t *mp; /* file system mount point */
5814 xfs_ifork_t *ifp; /* inode fork pointer */
5815 xfs_extnum_t lastx; /* last extent pointer */
5816 xfs_fileoff_t fileblock;
5818 if (startblock == HOLESTARTBLOCK) {
5820 out->bmv_block = -1;
5821 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, ip->i_size));
5822 fixlen -= out->bmv_offset;
5823 if (prealloced && out->bmv_offset + out->bmv_length == end) {
5824 /* Came to hole at EOF. Trim it. */
5827 out->bmv_length = fixlen;
5830 if (startblock == DELAYSTARTBLOCK)
5831 out->bmv_block = -2;
5833 out->bmv_block = xfs_fsb_to_db(ip, startblock);
5834 fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset);
5835 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
5836 if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) &&
5837 (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1))
5838 out->bmv_oflags |= BMV_OF_LAST;
5845 * Get inode's extents as described in bmv, and format for output.
5846 * Calls formatter to fill the user's buffer until all extents
5847 * are mapped, until the passed-in bmv->bmv_count slots have
5848 * been filled, or until the formatter short-circuits the loop,
5849 * if it is tracking filled-in extents on its own.
5851 int /* error code */
5854 struct getbmapx *bmv, /* user bmap structure */
5855 xfs_bmap_format_t formatter, /* format to user */
5856 void *arg) /* formatter arg */
5858 __int64_t bmvend; /* last block requested */
5859 int error; /* return value */
5860 __int64_t fixlen; /* length for -1 case */
5861 int i; /* extent number */
5862 int lock; /* lock state */
5863 xfs_bmbt_irec_t *map; /* buffer for user's data */
5864 xfs_mount_t *mp; /* file system mount point */
5865 int nex; /* # of user extents can do */
5866 int nexleft; /* # of user extents left */
5867 int subnex; /* # of bmapi's can do */
5868 int nmap; /* number of map entries */
5869 struct getbmapx out; /* output structure */
5870 int whichfork; /* data or attr fork */
5871 int prealloced; /* this is a file with
5872 * preallocated data space */
5873 int iflags; /* interface flags */
5874 int bmapi_flags; /* flags for xfs_bmapi */
5877 iflags = bmv->bmv_iflags;
5879 whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
5881 /* If the BMV_IF_NO_DMAPI_READ interface bit specified, do not
5882 * generate a DMAPI read event. Otherwise, if the DM_EVENT_READ
5883 * bit is set for the file, generate a read event in order
5884 * that the DMAPI application may do its thing before we return
5885 * the extents. Usually this means restoring user file data to
5886 * regions of the file that look like holes.
5888 * The "old behavior" (from XFS_IOC_GETBMAP) is to not specify
5889 * BMV_IF_NO_DMAPI_READ so that read events are generated.
5890 * If this were not true, callers of ioctl( XFS_IOC_GETBMAP )
5891 * could misinterpret holes in a DMAPI file as true holes,
5892 * when in fact they may represent offline user data.
5894 if ((iflags & BMV_IF_NO_DMAPI_READ) == 0 &&
5895 DM_EVENT_ENABLED(ip, DM_EVENT_READ) &&
5896 whichfork == XFS_DATA_FORK) {
5897 error = XFS_SEND_DATA(mp, DM_EVENT_READ, ip, 0, 0, 0, NULL);
5899 return XFS_ERROR(error);
5902 if (whichfork == XFS_ATTR_FORK) {
5903 if (XFS_IFORK_Q(ip)) {
5904 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
5905 ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
5906 ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
5907 return XFS_ERROR(EINVAL);
5908 } else if (unlikely(
5909 ip->i_d.di_aformat != 0 &&
5910 ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
5911 XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
5913 return XFS_ERROR(EFSCORRUPTED);
5915 } else if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
5916 ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
5917 ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
5918 return XFS_ERROR(EINVAL);
5919 if (whichfork == XFS_DATA_FORK) {
5920 if (xfs_get_extsz_hint(ip) ||
5921 ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
5923 fixlen = XFS_MAXIOFFSET(mp);
5926 fixlen = ip->i_size;
5933 if (bmv->bmv_length == -1) {
5934 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
5935 bmv->bmv_length = MAX( (__int64_t)(fixlen - bmv->bmv_offset),
5937 } else if (bmv->bmv_length < 0)
5938 return XFS_ERROR(EINVAL);
5939 if (bmv->bmv_length == 0) {
5940 bmv->bmv_entries = 0;
5943 nex = bmv->bmv_count - 1;
5945 return XFS_ERROR(EINVAL);
5946 bmvend = bmv->bmv_offset + bmv->bmv_length;
5948 xfs_ilock(ip, XFS_IOLOCK_SHARED);
5950 if (((iflags & BMV_IF_DELALLOC) == 0) &&
5951 (whichfork == XFS_DATA_FORK) &&
5952 (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size)) {
5953 /* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */
5954 error = xfs_flush_pages(ip, (xfs_off_t)0,
5957 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
5962 ASSERT(whichfork == XFS_ATTR_FORK || (iflags & BMV_IF_DELALLOC) ||
5963 ip->i_delayed_blks == 0);
5965 lock = xfs_ilock_map_shared(ip);
5968 * Don't let nex be bigger than the number of extents
5969 * we can have assuming alternating holes and real extents.
5971 if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
5972 nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
5974 bmapi_flags = xfs_bmapi_aflag(whichfork) |
5975 ((iflags & BMV_IF_PREALLOC) ? 0 : XFS_BMAPI_IGSTATE);
5978 * Allocate enough space to handle "subnex" maps at a time.
5981 map = kmem_alloc(subnex * sizeof(*map), KM_SLEEP);
5983 bmv->bmv_entries = 0;
5985 if ((XFS_IFORK_NEXTENTS(ip, whichfork) == 0)) {
5986 if (((iflags & BMV_IF_DELALLOC) == 0) ||
5987 whichfork == XFS_ATTR_FORK) {
5989 goto unlock_and_return;
5996 nmap = (nexleft > subnex) ? subnex : nexleft;
5997 error = xfs_bmapi(NULL, ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
5998 XFS_BB_TO_FSB(mp, bmv->bmv_length),
5999 bmapi_flags, NULL, 0, map, &nmap,
6002 goto unlock_and_return;
6003 ASSERT(nmap <= subnex);
6005 for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
6007 if (map[i].br_state == XFS_EXT_UNWRITTEN)
6008 out.bmv_oflags |= BMV_OF_PREALLOC;
6009 else if (map[i].br_startblock == DELAYSTARTBLOCK)
6010 out.bmv_oflags |= BMV_OF_DELALLOC;
6011 out.bmv_offset = XFS_FSB_TO_BB(mp, map[i].br_startoff);
6012 out.bmv_length = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
6013 out.bmv_unused1 = out.bmv_unused2 = 0;
6014 ASSERT(((iflags & BMV_IF_DELALLOC) != 0) ||
6015 (map[i].br_startblock != DELAYSTARTBLOCK));
6016 if (map[i].br_startblock == HOLESTARTBLOCK &&
6017 whichfork == XFS_ATTR_FORK) {
6018 /* came to the end of attribute fork */
6019 out.bmv_oflags |= BMV_OF_LAST;
6020 goto unlock_and_return;
6022 int full = 0; /* user array is full */
6024 if (!xfs_getbmapx_fix_eof_hole(ip, &out,
6026 map[i].br_startblock)) {
6027 goto unlock_and_return;
6030 /* format results & advance arg */
6031 error = formatter(&arg, &out, &full);
6033 goto unlock_and_return;
6036 out.bmv_offset + out.bmv_length;
6037 bmv->bmv_length = MAX((__int64_t)0,
6038 (__int64_t)(bmvend - bmv->bmv_offset));
6042 } while (nmap && nexleft && bmv->bmv_length);
6045 xfs_iunlock_map_shared(ip, lock);
6046 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
6054 * Check the last inode extent to determine whether this allocation will result
6055 * in blocks being allocated at the end of the file. When we allocate new data
6056 * blocks at the end of the file which do not start at the previous data block,
6057 * we will try to align the new blocks at stripe unit boundaries.
6059 STATIC int /* error */
6061 xfs_inode_t *ip, /* incore inode pointer */
6062 xfs_fileoff_t off, /* file offset in fsblocks */
6063 int whichfork, /* data or attribute fork */
6064 char *aeof) /* return value */
6066 int error; /* error return value */
6067 xfs_ifork_t *ifp; /* inode fork pointer */
6068 xfs_bmbt_rec_host_t *lastrec; /* extent record pointer */
6069 xfs_extnum_t nextents; /* number of file extents */
6070 xfs_bmbt_irec_t s; /* expanded extent record */
6072 ASSERT(whichfork == XFS_DATA_FORK);
6073 ifp = XFS_IFORK_PTR(ip, whichfork);
6074 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
6075 (error = xfs_iread_extents(NULL, ip, whichfork)))
6077 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
6078 if (nextents == 0) {
6083 * Go to the last extent
6085 lastrec = xfs_iext_get_ext(ifp, nextents - 1);
6086 xfs_bmbt_get_all(lastrec, &s);
6088 * Check we are allocating in the last extent (for delayed allocations)
6089 * or past the last extent for non-delayed allocations.
6091 *aeof = (off >= s.br_startoff &&
6092 off < s.br_startoff + s.br_blockcount &&
6093 isnullstartblock(s.br_startblock)) ||
6094 off >= s.br_startoff + s.br_blockcount;
6099 * Check if the endoff is outside the last extent. If so the caller will grow
6100 * the allocation to a stripe unit boundary.
6104 xfs_inode_t *ip, /* incore inode pointer */
6105 xfs_fileoff_t endoff, /* file offset in fsblocks */
6106 int whichfork, /* data or attribute fork */
6107 int *eof) /* result value */
6109 xfs_fsblock_t blockcount; /* extent block count */
6110 int error; /* error return value */
6111 xfs_ifork_t *ifp; /* inode fork pointer */
6112 xfs_bmbt_rec_host_t *lastrec; /* extent record pointer */
6113 xfs_extnum_t nextents; /* number of file extents */
6114 xfs_fileoff_t startoff; /* extent starting file offset */
6116 ASSERT(whichfork == XFS_DATA_FORK);
6117 ifp = XFS_IFORK_PTR(ip, whichfork);
6118 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
6119 (error = xfs_iread_extents(NULL, ip, whichfork)))
6121 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
6122 if (nextents == 0) {
6127 * Go to the last extent
6129 lastrec = xfs_iext_get_ext(ifp, nextents - 1);
6130 startoff = xfs_bmbt_get_startoff(lastrec);
6131 blockcount = xfs_bmbt_get_blockcount(lastrec);
6132 *eof = endoff >= startoff + blockcount;
6140 xfs_btree_cur_t *cur,
6150 for(i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
6151 bp = cur->bc_bufs[i];
6153 if (XFS_BUF_ADDR(bp) == bno)
6154 break; /* Found it */
6156 if (i == XFS_BTREE_MAXLEVELS)
6159 if (!bp) { /* Chase down all the log items to see if the bp is there */
6160 xfs_log_item_chunk_t *licp;
6164 licp = &tp->t_items;
6165 while (!bp && licp != NULL) {
6166 if (xfs_lic_are_all_free(licp)) {
6167 licp = licp->lic_next;
6170 for (i = 0; i < licp->lic_unused; i++) {
6171 xfs_log_item_desc_t *lidp;
6172 xfs_log_item_t *lip;
6173 xfs_buf_log_item_t *bip;
6176 if (xfs_lic_isfree(licp, i)) {
6180 lidp = xfs_lic_slot(licp, i);
6181 lip = lidp->lid_item;
6182 if (lip->li_type != XFS_LI_BUF)
6185 bip = (xfs_buf_log_item_t *)lip;
6188 if (XFS_BUF_ADDR(lbp) == bno) {
6190 break; /* Found it */
6193 licp = licp->lic_next;
6201 struct xfs_btree_block *block,
6207 __be64 *pp, *thispa; /* pointer to block address */
6208 xfs_bmbt_key_t *prevp, *keyp;
6210 ASSERT(be16_to_cpu(block->bb_level) > 0);
6213 for( i = 1; i <= xfs_btree_get_numrecs(block); i++) {
6214 dmxr = mp->m_bmap_dmxr[0];
6215 keyp = XFS_BMBT_KEY_ADDR(mp, block, i);
6218 ASSERT(be64_to_cpu(prevp->br_startoff) <
6219 be64_to_cpu(keyp->br_startoff));
6224 * Compare the block numbers to see if there are dups.
6227 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz);
6229 pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr);
6231 for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) {
6233 thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz);
6235 thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr);
6236 if (*thispa == *pp) {
6237 cmn_err(CE_WARN, "%s: thispa(%d) == pp(%d) %Ld",
6239 (unsigned long long)be64_to_cpu(*thispa));
6240 panic("%s: ptrs are equal in node\n",
6248 * Check that the extents for the inode ip are in the right order in all
6253 xfs_bmap_check_leaf_extents(
6254 xfs_btree_cur_t *cur, /* btree cursor or null */
6255 xfs_inode_t *ip, /* incore inode pointer */
6256 int whichfork) /* data or attr fork */
6258 struct xfs_btree_block *block; /* current btree block */
6259 xfs_fsblock_t bno; /* block # of "block" */
6260 xfs_buf_t *bp; /* buffer for "block" */
6261 int error; /* error return value */
6262 xfs_extnum_t i=0, j; /* index into the extents list */
6263 xfs_ifork_t *ifp; /* fork structure */
6264 int level; /* btree level, for checking */
6265 xfs_mount_t *mp; /* file system mount structure */
6266 __be64 *pp; /* pointer to block address */
6267 xfs_bmbt_rec_t *ep; /* pointer to current extent */
6268 xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */
6269 xfs_bmbt_rec_t *nextp; /* pointer to next extent */
6272 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) {
6278 ifp = XFS_IFORK_PTR(ip, whichfork);
6279 block = ifp->if_broot;
6281 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
6283 level = be16_to_cpu(block->bb_level);
6285 xfs_check_block(block, mp, 1, ifp->if_broot_bytes);
6286 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
6287 bno = be64_to_cpu(*pp);
6289 ASSERT(bno != NULLDFSBNO);
6290 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
6291 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
6294 * Go down the tree until leaf level is reached, following the first
6295 * pointer (leftmost) at each level.
6297 while (level-- > 0) {
6298 /* See if buf is in cur first */
6299 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
6305 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
6306 XFS_BMAP_BTREE_REF)))
6308 block = XFS_BUF_TO_BLOCK(bp);
6309 XFS_WANT_CORRUPTED_GOTO(
6310 xfs_bmap_sanity_check(mp, bp, level),
6316 * Check this block for basic sanity (increasing keys and
6317 * no duplicate blocks).
6320 xfs_check_block(block, mp, 0, 0);
6321 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
6322 bno = be64_to_cpu(*pp);
6323 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
6326 xfs_trans_brelse(NULL, bp);
6331 * Here with bp and block set to the leftmost leaf node in the tree.
6336 * Loop over all leaf nodes checking that all extents are in the right order.
6339 xfs_fsblock_t nextbno;
6340 xfs_extnum_t num_recs;
6343 num_recs = xfs_btree_get_numrecs(block);
6346 * Read-ahead the next leaf block, if any.
6349 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
6352 * Check all the extents to make sure they are OK.
6353 * If we had a previous block, the last entry should
6354 * conform with the first entry in this one.
6357 ep = XFS_BMBT_REC_ADDR(mp, block, 1);
6359 ASSERT(xfs_bmbt_disk_get_startoff(&last) +
6360 xfs_bmbt_disk_get_blockcount(&last) <=
6361 xfs_bmbt_disk_get_startoff(ep));
6363 for (j = 1; j < num_recs; j++) {
6364 nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1);
6365 ASSERT(xfs_bmbt_disk_get_startoff(ep) +
6366 xfs_bmbt_disk_get_blockcount(ep) <=
6367 xfs_bmbt_disk_get_startoff(nextp));
6375 xfs_trans_brelse(NULL, bp);
6379 * If we've reached the end, stop.
6381 if (bno == NULLFSBLOCK)
6384 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
6390 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
6391 XFS_BMAP_BTREE_REF)))
6393 block = XFS_BUF_TO_BLOCK(bp);
6397 xfs_trans_brelse(NULL, bp);
6402 cmn_err(CE_WARN, "%s: at error0", __func__);
6404 xfs_trans_brelse(NULL, bp);
6406 cmn_err(CE_WARN, "%s: BAD after btree leaves for %d extents",
6408 panic("%s: CORRUPTED BTREE OR SOMETHING", __func__);
6414 * Count fsblocks of the given fork.
6417 xfs_bmap_count_blocks(
6418 xfs_trans_t *tp, /* transaction pointer */
6419 xfs_inode_t *ip, /* incore inode */
6420 int whichfork, /* data or attr fork */
6421 int *count) /* out: count of blocks */
6423 struct xfs_btree_block *block; /* current btree block */
6424 xfs_fsblock_t bno; /* block # of "block" */
6425 xfs_ifork_t *ifp; /* fork structure */
6426 int level; /* btree level, for checking */
6427 xfs_mount_t *mp; /* file system mount structure */
6428 __be64 *pp; /* pointer to block address */
6432 ifp = XFS_IFORK_PTR(ip, whichfork);
6433 if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
6434 xfs_bmap_count_leaves(ifp, 0,
6435 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
6441 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
6443 block = ifp->if_broot;
6444 level = be16_to_cpu(block->bb_level);
6446 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
6447 bno = be64_to_cpu(*pp);
6448 ASSERT(bno != NULLDFSBNO);
6449 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
6450 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
6452 if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
6453 XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
6455 return XFS_ERROR(EFSCORRUPTED);
6462 * Recursively walks each level of a btree
6463 * to count total fsblocks is use.
6465 STATIC int /* error */
6466 xfs_bmap_count_tree(
6467 xfs_mount_t *mp, /* file system mount point */
6468 xfs_trans_t *tp, /* transaction pointer */
6469 xfs_ifork_t *ifp, /* inode fork pointer */
6470 xfs_fsblock_t blockno, /* file system block number */
6471 int levelin, /* level in btree */
6472 int *count) /* Count of blocks */
6475 xfs_buf_t *bp, *nbp;
6476 int level = levelin;
6478 xfs_fsblock_t bno = blockno;
6479 xfs_fsblock_t nextbno;
6480 struct xfs_btree_block *block, *nextblock;
6483 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF)))
6486 block = XFS_BUF_TO_BLOCK(bp);
6489 /* Not at node above leafs, count this level of nodes */
6490 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
6491 while (nextbno != NULLFSBLOCK) {
6492 if ((error = xfs_btree_read_bufl(mp, tp, nextbno,
6493 0, &nbp, XFS_BMAP_BTREE_REF)))
6496 nextblock = XFS_BUF_TO_BLOCK(nbp);
6497 nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib);
6498 xfs_trans_brelse(tp, nbp);
6501 /* Dive to the next level */
6502 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
6503 bno = be64_to_cpu(*pp);
6504 if (unlikely((error =
6505 xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
6506 xfs_trans_brelse(tp, bp);
6507 XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
6508 XFS_ERRLEVEL_LOW, mp);
6509 return XFS_ERROR(EFSCORRUPTED);
6511 xfs_trans_brelse(tp, bp);
6513 /* count all level 1 nodes and their leaves */
6515 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
6516 numrecs = be16_to_cpu(block->bb_numrecs);
6517 xfs_bmap_disk_count_leaves(mp, block, numrecs, count);
6518 xfs_trans_brelse(tp, bp);
6519 if (nextbno == NULLFSBLOCK)
6522 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
6523 XFS_BMAP_BTREE_REF)))
6526 block = XFS_BUF_TO_BLOCK(bp);
6533 * Count leaf blocks given a range of extent records.
6536 xfs_bmap_count_leaves(
6544 for (b = 0; b < numrecs; b++) {
6545 xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b);
6546 *count += xfs_bmbt_get_blockcount(frp);
6551 * Count leaf blocks given a range of extent records originally
6555 xfs_bmap_disk_count_leaves(
6556 struct xfs_mount *mp,
6557 struct xfs_btree_block *block,
6562 xfs_bmbt_rec_t *frp;
6564 for (b = 1; b <= numrecs; b++) {
6565 frp = XFS_BMBT_REC_ADDR(mp, block, b);
6566 *count += xfs_bmbt_disk_get_blockcount(frp);
projects / linux-2.6 / blob