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"
60 xfs_bmap_check_leaf_extents(xfs_btree_cur_t *cur, xfs_inode_t *ip, int whichfork);
63 kmem_zone_t *xfs_bmap_free_item_zone;
66 * Prototypes for internal bmap routines.
71 * Called from xfs_bmap_add_attrfork to handle extents format files.
73 STATIC int /* error */
74 xfs_bmap_add_attrfork_extents(
75 xfs_trans_t *tp, /* transaction pointer */
76 xfs_inode_t *ip, /* incore inode pointer */
77 xfs_fsblock_t *firstblock, /* first block allocated */
78 xfs_bmap_free_t *flist, /* blocks to free at commit */
79 int *flags); /* inode logging flags */
82 * Called from xfs_bmap_add_attrfork to handle local format files.
84 STATIC int /* error */
85 xfs_bmap_add_attrfork_local(
86 xfs_trans_t *tp, /* transaction pointer */
87 xfs_inode_t *ip, /* incore inode pointer */
88 xfs_fsblock_t *firstblock, /* first block allocated */
89 xfs_bmap_free_t *flist, /* blocks to free at commit */
90 int *flags); /* inode logging flags */
93 * Called by xfs_bmapi to update file extent records and the btree
94 * after allocating space (or doing a delayed allocation).
96 STATIC int /* error */
98 xfs_inode_t *ip, /* incore inode pointer */
99 xfs_extnum_t idx, /* extent number to update/insert */
100 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
101 xfs_bmbt_irec_t *new, /* new data to add to file extents */
102 xfs_fsblock_t *first, /* pointer to firstblock variable */
103 xfs_bmap_free_t *flist, /* list of extents to be freed */
104 int *logflagsp, /* inode logging flags */
105 xfs_extdelta_t *delta, /* Change made to incore extents */
106 int whichfork, /* data or attr fork */
107 int rsvd); /* OK to allocate reserved blocks */
110 * Called by xfs_bmap_add_extent to handle cases converting a delayed
111 * allocation to a real allocation.
113 STATIC int /* error */
114 xfs_bmap_add_extent_delay_real(
115 xfs_inode_t *ip, /* incore inode pointer */
116 xfs_extnum_t idx, /* extent number to update/insert */
117 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
118 xfs_bmbt_irec_t *new, /* new data to add to file extents */
119 xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */
120 xfs_fsblock_t *first, /* pointer to firstblock variable */
121 xfs_bmap_free_t *flist, /* list of extents to be freed */
122 int *logflagsp, /* inode logging flags */
123 xfs_extdelta_t *delta, /* Change made to incore extents */
124 int rsvd); /* OK to allocate reserved blocks */
127 * Called by xfs_bmap_add_extent to handle cases converting a hole
128 * to a delayed allocation.
130 STATIC int /* error */
131 xfs_bmap_add_extent_hole_delay(
132 xfs_inode_t *ip, /* incore inode pointer */
133 xfs_extnum_t idx, /* extent number to update/insert */
134 xfs_bmbt_irec_t *new, /* new data to add to file extents */
135 int *logflagsp,/* inode logging flags */
136 xfs_extdelta_t *delta, /* Change made to incore extents */
137 int rsvd); /* OK to allocate reserved blocks */
140 * Called by xfs_bmap_add_extent to handle cases converting a hole
141 * to a real allocation.
143 STATIC int /* error */
144 xfs_bmap_add_extent_hole_real(
145 xfs_inode_t *ip, /* incore inode pointer */
146 xfs_extnum_t idx, /* extent number to update/insert */
147 xfs_btree_cur_t *cur, /* if null, not a btree */
148 xfs_bmbt_irec_t *new, /* new data to add to file extents */
149 int *logflagsp, /* inode logging flags */
150 xfs_extdelta_t *delta, /* Change made to incore extents */
151 int whichfork); /* data or attr fork */
154 * Called by xfs_bmap_add_extent to handle cases converting an unwritten
155 * allocation to a real allocation or vice versa.
157 STATIC int /* error */
158 xfs_bmap_add_extent_unwritten_real(
159 xfs_inode_t *ip, /* incore inode pointer */
160 xfs_extnum_t idx, /* extent number to update/insert */
161 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
162 xfs_bmbt_irec_t *new, /* new data to add to file extents */
163 int *logflagsp, /* inode logging flags */
164 xfs_extdelta_t *delta); /* Change made to incore extents */
167 * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
168 * It figures out where to ask the underlying allocator to put the new extent.
170 STATIC int /* error */
172 xfs_bmalloca_t *ap); /* bmap alloc argument struct */
175 * Transform a btree format file with only one leaf node, where the
176 * extents list will fit in the inode, into an extents format file.
177 * Since the file extents are already in-core, all we have to do is
178 * give up the space for the btree root and pitch the leaf block.
180 STATIC int /* error */
181 xfs_bmap_btree_to_extents(
182 xfs_trans_t *tp, /* transaction pointer */
183 xfs_inode_t *ip, /* incore inode pointer */
184 xfs_btree_cur_t *cur, /* btree cursor */
185 int *logflagsp, /* inode logging flags */
186 int whichfork); /* data or attr fork */
189 * Called by xfs_bmapi to update file extent records and the btree
190 * after removing space (or undoing a delayed allocation).
192 STATIC int /* error */
194 xfs_inode_t *ip, /* incore inode pointer */
195 xfs_trans_t *tp, /* current trans pointer */
196 xfs_extnum_t idx, /* extent number to update/insert */
197 xfs_bmap_free_t *flist, /* list of extents to be freed */
198 xfs_btree_cur_t *cur, /* if null, not a btree */
199 xfs_bmbt_irec_t *new, /* new data to add to file extents */
200 int *logflagsp,/* inode logging flags */
201 xfs_extdelta_t *delta, /* Change made to incore extents */
202 int whichfork, /* data or attr fork */
203 int rsvd); /* OK to allocate reserved blocks */
206 * Remove the entry "free" from the free item list. Prev points to the
207 * previous entry, unless "free" is the head of the list.
211 xfs_bmap_free_t *flist, /* free item list header */
212 xfs_bmap_free_item_t *prev, /* previous item on list, if any */
213 xfs_bmap_free_item_t *free); /* list item to be freed */
216 * Convert an extents-format file into a btree-format file.
217 * The new file will have a root block (in the inode) and a single child block.
219 STATIC int /* error */
220 xfs_bmap_extents_to_btree(
221 xfs_trans_t *tp, /* transaction pointer */
222 xfs_inode_t *ip, /* incore inode pointer */
223 xfs_fsblock_t *firstblock, /* first-block-allocated */
224 xfs_bmap_free_t *flist, /* blocks freed in xaction */
225 xfs_btree_cur_t **curp, /* cursor returned to caller */
226 int wasdel, /* converting a delayed alloc */
227 int *logflagsp, /* inode logging flags */
228 int whichfork); /* data or attr fork */
231 * Convert a local file to an extents file.
232 * This code is sort of bogus, since the file data needs to get
233 * logged so it won't be lost. The bmap-level manipulations are ok, though.
235 STATIC int /* error */
236 xfs_bmap_local_to_extents(
237 xfs_trans_t *tp, /* transaction pointer */
238 xfs_inode_t *ip, /* incore inode pointer */
239 xfs_fsblock_t *firstblock, /* first block allocated in xaction */
240 xfs_extlen_t total, /* total blocks needed by transaction */
241 int *logflagsp, /* inode logging flags */
242 int whichfork); /* data or attr fork */
245 * Search the extents list for the inode, for the extent containing bno.
246 * If bno lies in a hole, point to the next entry. If bno lies past eof,
247 * *eofp will be set, and *prevp will contain the last entry (null if none).
248 * Else, *lastxp will be set to the index of the found
249 * entry; *gotp will contain the entry.
251 STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
252 xfs_bmap_search_extents(
253 xfs_inode_t *ip, /* incore inode pointer */
254 xfs_fileoff_t bno, /* block number searched for */
255 int whichfork, /* data or attr fork */
256 int *eofp, /* out: end of file found */
257 xfs_extnum_t *lastxp, /* out: last extent index */
258 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
259 xfs_bmbt_irec_t *prevp); /* out: previous extent entry found */
262 * Check the last inode extent to determine whether this allocation will result
263 * in blocks being allocated at the end of the file. When we allocate new data
264 * blocks at the end of the file which do not start at the previous data block,
265 * we will try to align the new blocks at stripe unit boundaries.
267 STATIC int /* error */
269 xfs_inode_t *ip, /* incore inode pointer */
270 xfs_fileoff_t off, /* file offset in fsblocks */
271 int whichfork, /* data or attribute fork */
272 char *aeof); /* return value */
274 #ifdef XFS_BMAP_TRACE
276 * Add bmap trace entry prior to a call to xfs_iext_remove.
279 xfs_bmap_trace_delete(
280 const char *fname, /* function name */
281 char *desc, /* operation description */
282 xfs_inode_t *ip, /* incore inode pointer */
283 xfs_extnum_t idx, /* index of entry(entries) deleted */
284 xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */
285 int whichfork); /* data or attr fork */
288 * Add bmap trace entry prior to a call to xfs_iext_insert, or
289 * reading in the extents list from the disk (in the btree).
292 xfs_bmap_trace_insert(
293 const char *fname, /* function name */
294 char *desc, /* operation description */
295 xfs_inode_t *ip, /* incore inode pointer */
296 xfs_extnum_t idx, /* index of entry(entries) inserted */
297 xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */
298 xfs_bmbt_irec_t *r1, /* inserted record 1 */
299 xfs_bmbt_irec_t *r2, /* inserted record 2 or null */
300 int whichfork); /* data or attr fork */
303 * Add bmap trace entry after updating an extent record in place.
306 xfs_bmap_trace_post_update(
307 const char *fname, /* function name */
308 char *desc, /* operation description */
309 xfs_inode_t *ip, /* incore inode pointer */
310 xfs_extnum_t idx, /* index of entry updated */
311 int whichfork); /* data or attr fork */
314 * Add bmap trace entry prior to updating an extent record in place.
317 xfs_bmap_trace_pre_update(
318 const char *fname, /* function name */
319 char *desc, /* operation description */
320 xfs_inode_t *ip, /* incore inode pointer */
321 xfs_extnum_t idx, /* index of entry to be updated */
322 int whichfork); /* data or attr fork */
324 #define XFS_BMAP_TRACE_DELETE(d,ip,i,c,w) \
325 xfs_bmap_trace_delete(__FUNCTION__,d,ip,i,c,w)
326 #define XFS_BMAP_TRACE_INSERT(d,ip,i,c,r1,r2,w) \
327 xfs_bmap_trace_insert(__FUNCTION__,d,ip,i,c,r1,r2,w)
328 #define XFS_BMAP_TRACE_POST_UPDATE(d,ip,i,w) \
329 xfs_bmap_trace_post_update(__FUNCTION__,d,ip,i,w)
330 #define XFS_BMAP_TRACE_PRE_UPDATE(d,ip,i,w) \
331 xfs_bmap_trace_pre_update(__FUNCTION__,d,ip,i,w)
333 #define XFS_BMAP_TRACE_DELETE(d,ip,i,c,w)
334 #define XFS_BMAP_TRACE_INSERT(d,ip,i,c,r1,r2,w)
335 #define XFS_BMAP_TRACE_POST_UPDATE(d,ip,i,w)
336 #define XFS_BMAP_TRACE_PRE_UPDATE(d,ip,i,w)
337 #endif /* XFS_BMAP_TRACE */
340 * Compute the worst-case number of indirect blocks that will be used
341 * for ip's delayed extent of length "len".
344 xfs_bmap_worst_indlen(
345 xfs_inode_t *ip, /* incore inode pointer */
346 xfs_filblks_t len); /* delayed extent length */
350 * Perform various validation checks on the values being returned
354 xfs_bmap_validate_ret(
358 xfs_bmbt_irec_t *mval,
362 #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap)
365 #if defined(XFS_RW_TRACE)
374 #define xfs_bunmap_trace(ip, bno, len, flags, ra)
375 #endif /* XFS_RW_TRACE */
382 xfs_fsblock_t blockno,
387 xfs_bmap_count_leaves(
394 xfs_bmap_disk_count_leaves(
396 xfs_bmbt_block_t *block,
401 * Bmap internal routines.
405 * Called from xfs_bmap_add_attrfork to handle btree format files.
407 STATIC int /* error */
408 xfs_bmap_add_attrfork_btree(
409 xfs_trans_t *tp, /* transaction pointer */
410 xfs_inode_t *ip, /* incore inode pointer */
411 xfs_fsblock_t *firstblock, /* first block allocated */
412 xfs_bmap_free_t *flist, /* blocks to free at commit */
413 int *flags) /* inode logging flags */
415 xfs_btree_cur_t *cur; /* btree cursor */
416 int error; /* error return value */
417 xfs_mount_t *mp; /* file system mount struct */
418 int stat; /* newroot status */
421 if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip))
422 *flags |= XFS_ILOG_DBROOT;
424 cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip,
426 cur->bc_private.b.flist = flist;
427 cur->bc_private.b.firstblock = *firstblock;
428 if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat)))
430 ASSERT(stat == 1); /* must be at least one entry */
431 if ((error = xfs_bmbt_newroot(cur, flags, &stat)))
434 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
435 return XFS_ERROR(ENOSPC);
437 *firstblock = cur->bc_private.b.firstblock;
438 cur->bc_private.b.allocated = 0;
439 xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
443 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
448 * Called from xfs_bmap_add_attrfork to handle extents format files.
450 STATIC int /* error */
451 xfs_bmap_add_attrfork_extents(
452 xfs_trans_t *tp, /* transaction pointer */
453 xfs_inode_t *ip, /* incore inode pointer */
454 xfs_fsblock_t *firstblock, /* first block allocated */
455 xfs_bmap_free_t *flist, /* blocks to free at commit */
456 int *flags) /* inode logging flags */
458 xfs_btree_cur_t *cur; /* bmap btree cursor */
459 int error; /* error return value */
461 if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip))
464 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0,
465 flags, XFS_DATA_FORK);
467 cur->bc_private.b.allocated = 0;
468 xfs_btree_del_cursor(cur,
469 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
475 * Called from xfs_bmap_add_attrfork to handle local format files.
477 STATIC int /* error */
478 xfs_bmap_add_attrfork_local(
479 xfs_trans_t *tp, /* transaction pointer */
480 xfs_inode_t *ip, /* incore inode pointer */
481 xfs_fsblock_t *firstblock, /* first block allocated */
482 xfs_bmap_free_t *flist, /* blocks to free at commit */
483 int *flags) /* inode logging flags */
485 xfs_da_args_t dargs; /* args for dir/attr code */
486 int error; /* error return value */
487 xfs_mount_t *mp; /* mount structure pointer */
489 if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip))
491 if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
493 memset(&dargs, 0, sizeof(dargs));
495 dargs.firstblock = firstblock;
497 dargs.total = mp->m_dirblkfsbs;
498 dargs.whichfork = XFS_DATA_FORK;
500 error = xfs_dir2_sf_to_block(&dargs);
502 error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags,
508 * Called by xfs_bmapi to update file extent records and the btree
509 * after allocating space (or doing a delayed allocation).
511 STATIC int /* error */
513 xfs_inode_t *ip, /* incore inode pointer */
514 xfs_extnum_t idx, /* extent number to update/insert */
515 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
516 xfs_bmbt_irec_t *new, /* new data to add to file extents */
517 xfs_fsblock_t *first, /* pointer to firstblock variable */
518 xfs_bmap_free_t *flist, /* list of extents to be freed */
519 int *logflagsp, /* inode logging flags */
520 xfs_extdelta_t *delta, /* Change made to incore extents */
521 int whichfork, /* data or attr fork */
522 int rsvd) /* OK to use reserved data blocks */
524 xfs_btree_cur_t *cur; /* btree cursor or null */
525 xfs_filblks_t da_new; /* new count del alloc blocks used */
526 xfs_filblks_t da_old; /* old count del alloc blocks used */
527 int error; /* error return value */
528 xfs_ifork_t *ifp; /* inode fork ptr */
529 int logflags; /* returned value */
530 xfs_extnum_t nextents; /* number of extents in file now */
532 XFS_STATS_INC(xs_add_exlist);
534 ifp = XFS_IFORK_PTR(ip, whichfork);
535 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
536 ASSERT(idx <= nextents);
540 * This is the first extent added to a new/empty file.
541 * Special case this one, so other routines get to assume there are
542 * already extents in the list.
545 XFS_BMAP_TRACE_INSERT("insert empty", ip, 0, 1, new, NULL,
547 xfs_iext_insert(ifp, 0, 1, new);
550 if (!ISNULLSTARTBLOCK(new->br_startblock)) {
551 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
552 logflags = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
555 /* DELTA: single new extent */
557 if (delta->xed_startoff > new->br_startoff)
558 delta->xed_startoff = new->br_startoff;
559 if (delta->xed_blockcount <
560 new->br_startoff + new->br_blockcount)
561 delta->xed_blockcount = new->br_startoff +
566 * Any kind of new delayed allocation goes here.
568 else if (ISNULLSTARTBLOCK(new->br_startblock)) {
570 ASSERT((cur->bc_private.b.flags &
571 XFS_BTCUR_BPRV_WASDEL) == 0);
572 if ((error = xfs_bmap_add_extent_hole_delay(ip, idx, new,
573 &logflags, delta, rsvd)))
577 * Real allocation off the end of the file.
579 else if (idx == nextents) {
581 ASSERT((cur->bc_private.b.flags &
582 XFS_BTCUR_BPRV_WASDEL) == 0);
583 if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, new,
584 &logflags, delta, whichfork)))
587 xfs_bmbt_irec_t prev; /* old extent at offset idx */
590 * Get the record referred to by idx.
592 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &prev);
594 * If it's a real allocation record, and the new allocation ends
595 * after the start of the referred to record, then we're filling
596 * in a delayed or unwritten allocation with a real one, or
597 * converting real back to unwritten.
599 if (!ISNULLSTARTBLOCK(new->br_startblock) &&
600 new->br_startoff + new->br_blockcount > prev.br_startoff) {
601 if (prev.br_state != XFS_EXT_UNWRITTEN &&
602 ISNULLSTARTBLOCK(prev.br_startblock)) {
603 da_old = STARTBLOCKVAL(prev.br_startblock);
605 ASSERT(cur->bc_private.b.flags &
606 XFS_BTCUR_BPRV_WASDEL);
607 if ((error = xfs_bmap_add_extent_delay_real(ip,
608 idx, &cur, new, &da_new, first, flist,
609 &logflags, delta, rsvd)))
611 } else if (new->br_state == XFS_EXT_NORM) {
612 ASSERT(new->br_state == XFS_EXT_NORM);
613 if ((error = xfs_bmap_add_extent_unwritten_real(
614 ip, idx, &cur, new, &logflags, delta)))
617 ASSERT(new->br_state == XFS_EXT_UNWRITTEN);
618 if ((error = xfs_bmap_add_extent_unwritten_real(
619 ip, idx, &cur, new, &logflags, delta)))
622 ASSERT(*curp == cur || *curp == NULL);
625 * Otherwise we're filling in a hole with an allocation.
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,
632 new, &logflags, delta, whichfork)))
637 ASSERT(*curp == cur || *curp == NULL);
639 * Convert to a btree if necessary.
641 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
642 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
643 int tmp_logflags; /* partial log flag return val */
646 error = xfs_bmap_extents_to_btree(ip->i_transp, ip, first,
647 flist, &cur, da_old > 0, &tmp_logflags, whichfork);
648 logflags |= tmp_logflags;
653 * Adjust for changes in reserved delayed indirect blocks.
654 * Nothing to do for disk quotas here.
656 if (da_old || da_new) {
661 nblks += cur->bc_private.b.allocated;
662 ASSERT(nblks <= da_old);
664 xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS,
665 (int64_t)(da_old - nblks), rsvd);
668 * Clear out the allocated field, done with it now in any case.
671 cur->bc_private.b.allocated = 0;
677 xfs_bmap_check_leaf_extents(*curp, ip, whichfork);
679 *logflagsp = logflags;
684 * Called by xfs_bmap_add_extent to handle cases converting a delayed
685 * allocation to a real allocation.
687 STATIC int /* error */
688 xfs_bmap_add_extent_delay_real(
689 xfs_inode_t *ip, /* incore inode pointer */
690 xfs_extnum_t idx, /* extent number to update/insert */
691 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
692 xfs_bmbt_irec_t *new, /* new data to add to file extents */
693 xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */
694 xfs_fsblock_t *first, /* pointer to firstblock variable */
695 xfs_bmap_free_t *flist, /* list of extents to be freed */
696 int *logflagsp, /* inode logging flags */
697 xfs_extdelta_t *delta, /* Change made to incore extents */
698 int rsvd) /* OK to use reserved data block allocation */
700 xfs_btree_cur_t *cur; /* btree cursor */
701 int diff; /* temp value */
702 xfs_bmbt_rec_host_t *ep; /* extent entry for idx */
703 int error; /* error return value */
704 int i; /* temp state */
705 xfs_ifork_t *ifp; /* inode fork pointer */
706 xfs_fileoff_t new_endoff; /* end offset of new entry */
707 xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
708 /* left is 0, right is 1, prev is 2 */
709 int rval=0; /* return value (logging flags) */
710 int state = 0;/* state bits, accessed thru macros */
711 xfs_filblks_t temp=0; /* value for dnew calculations */
712 xfs_filblks_t temp2=0;/* value for dnew calculations */
713 int tmp_rval; /* partial logging flags */
714 enum { /* bit number definitions for state */
715 LEFT_CONTIG, RIGHT_CONTIG,
716 LEFT_FILLING, RIGHT_FILLING,
717 LEFT_DELAY, RIGHT_DELAY,
718 LEFT_VALID, RIGHT_VALID
724 #define MASK(b) (1 << (b))
725 #define MASK2(a,b) (MASK(a) | MASK(b))
726 #define MASK3(a,b,c) (MASK2(a,b) | MASK(c))
727 #define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d))
728 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
729 #define STATE_TEST(b) (state & MASK(b))
730 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
731 ((state &= ~MASK(b)), 0))
732 #define SWITCH_STATE \
733 (state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG))
736 * Set up a bunch of variables to make the tests simpler.
739 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
740 ep = xfs_iext_get_ext(ifp, idx);
741 xfs_bmbt_get_all(ep, &PREV);
742 new_endoff = new->br_startoff + new->br_blockcount;
743 ASSERT(PREV.br_startoff <= new->br_startoff);
744 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
746 * Set flags determining what part of the previous delayed allocation
747 * extent is being replaced by a real allocation.
749 STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff);
750 STATE_SET(RIGHT_FILLING,
751 PREV.br_startoff + PREV.br_blockcount == new_endoff);
753 * Check and set flags if this segment has a left neighbor.
754 * Don't set contiguous if the combined extent would be too large.
756 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
757 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
758 STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(LEFT.br_startblock));
760 STATE_SET(LEFT_CONTIG,
761 STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
762 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
763 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
764 LEFT.br_state == new->br_state &&
765 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN);
767 * Check and set flags if this segment has a right neighbor.
768 * Don't set contiguous if the combined extent would be too large.
769 * Also check for all-three-contiguous being too large.
771 if (STATE_SET_TEST(RIGHT_VALID,
773 ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) {
774 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
775 STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(RIGHT.br_startblock));
777 STATE_SET(RIGHT_CONTIG,
778 STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
779 new_endoff == RIGHT.br_startoff &&
780 new->br_startblock + new->br_blockcount ==
781 RIGHT.br_startblock &&
782 new->br_state == RIGHT.br_state &&
783 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
784 ((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) !=
785 MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) ||
786 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
790 * Switch out based on the FILLING and CONTIG state bits.
792 switch (SWITCH_STATE) {
794 case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
796 * Filling in all of a previously delayed allocation extent.
797 * The left and right neighbors are both contiguous with new.
799 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC|RC", ip, idx - 1,
801 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
802 LEFT.br_blockcount + PREV.br_blockcount +
803 RIGHT.br_blockcount);
804 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC|RC", ip, idx - 1,
806 XFS_BMAP_TRACE_DELETE("LF|RF|LC|RC", ip, idx, 2, XFS_DATA_FORK);
807 xfs_iext_remove(ifp, idx, 2);
808 ip->i_df.if_lastex = idx - 1;
809 ip->i_d.di_nextents--;
811 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
813 rval = XFS_ILOG_CORE;
814 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
816 RIGHT.br_blockcount, &i)))
819 if ((error = xfs_bmbt_delete(cur, &i)))
822 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
825 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
829 RIGHT.br_blockcount, LEFT.br_state)))
833 /* DELTA: Three in-core extents are replaced by one. */
834 temp = LEFT.br_startoff;
835 temp2 = LEFT.br_blockcount +
840 case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG):
842 * Filling in all of a previously delayed allocation extent.
843 * The left neighbor is contiguous, the right is not.
845 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC", ip, idx - 1,
847 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
848 LEFT.br_blockcount + PREV.br_blockcount);
849 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC", ip, idx - 1,
851 ip->i_df.if_lastex = idx - 1;
852 XFS_BMAP_TRACE_DELETE("LF|RF|LC", ip, idx, 1, XFS_DATA_FORK);
853 xfs_iext_remove(ifp, idx, 1);
855 rval = XFS_ILOG_DEXT;
858 if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
859 LEFT.br_startblock, LEFT.br_blockcount,
863 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
866 PREV.br_blockcount, LEFT.br_state)))
870 /* DELTA: Two in-core extents are replaced by one. */
871 temp = LEFT.br_startoff;
872 temp2 = LEFT.br_blockcount +
876 case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG):
878 * Filling in all of a previously delayed allocation extent.
879 * The right neighbor is contiguous, the left is not.
881 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|RC", ip, idx, XFS_DATA_FORK);
882 xfs_bmbt_set_startblock(ep, new->br_startblock);
883 xfs_bmbt_set_blockcount(ep,
884 PREV.br_blockcount + RIGHT.br_blockcount);
885 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|RC", ip, idx, XFS_DATA_FORK);
886 ip->i_df.if_lastex = idx;
887 XFS_BMAP_TRACE_DELETE("LF|RF|RC", ip, idx + 1, 1, XFS_DATA_FORK);
888 xfs_iext_remove(ifp, idx + 1, 1);
890 rval = XFS_ILOG_DEXT;
893 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
895 RIGHT.br_blockcount, &i)))
898 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
901 RIGHT.br_blockcount, PREV.br_state)))
905 /* DELTA: Two in-core extents are replaced by one. */
906 temp = PREV.br_startoff;
907 temp2 = PREV.br_blockcount +
911 case MASK2(LEFT_FILLING, RIGHT_FILLING):
913 * Filling in all of a previously delayed allocation extent.
914 * Neither the left nor right neighbors are contiguous with
917 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF", ip, idx, XFS_DATA_FORK);
918 xfs_bmbt_set_startblock(ep, new->br_startblock);
919 XFS_BMAP_TRACE_POST_UPDATE("LF|RF", ip, idx, XFS_DATA_FORK);
920 ip->i_df.if_lastex = idx;
921 ip->i_d.di_nextents++;
923 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
925 rval = XFS_ILOG_CORE;
926 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
927 new->br_startblock, new->br_blockcount,
931 cur->bc_rec.b.br_state = XFS_EXT_NORM;
932 if ((error = xfs_bmbt_insert(cur, &i)))
937 /* DELTA: The in-core extent described by new changed type. */
938 temp = new->br_startoff;
939 temp2 = new->br_blockcount;
942 case MASK2(LEFT_FILLING, LEFT_CONTIG):
944 * Filling in the first part of a previous delayed allocation.
945 * The left neighbor is contiguous.
947 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx - 1, XFS_DATA_FORK);
948 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
949 LEFT.br_blockcount + new->br_blockcount);
950 xfs_bmbt_set_startoff(ep,
951 PREV.br_startoff + new->br_blockcount);
952 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx - 1, XFS_DATA_FORK);
953 temp = PREV.br_blockcount - new->br_blockcount;
954 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx, XFS_DATA_FORK);
955 xfs_bmbt_set_blockcount(ep, temp);
956 ip->i_df.if_lastex = idx - 1;
958 rval = XFS_ILOG_DEXT;
961 if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff,
962 LEFT.br_startblock, LEFT.br_blockcount,
966 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
973 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
974 STARTBLOCKVAL(PREV.br_startblock));
975 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
976 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx, XFS_DATA_FORK);
978 /* DELTA: The boundary between two in-core extents moved. */
979 temp = LEFT.br_startoff;
980 temp2 = LEFT.br_blockcount +
984 case MASK(LEFT_FILLING):
986 * Filling in the first part of a previous delayed allocation.
987 * The left neighbor is not contiguous.
989 XFS_BMAP_TRACE_PRE_UPDATE("LF", ip, idx, XFS_DATA_FORK);
990 xfs_bmbt_set_startoff(ep, new_endoff);
991 temp = PREV.br_blockcount - new->br_blockcount;
992 xfs_bmbt_set_blockcount(ep, temp);
993 XFS_BMAP_TRACE_INSERT("LF", ip, idx, 1, new, NULL,
995 xfs_iext_insert(ifp, idx, 1, new);
996 ip->i_df.if_lastex = idx;
997 ip->i_d.di_nextents++;
999 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1001 rval = XFS_ILOG_CORE;
1002 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1003 new->br_startblock, new->br_blockcount,
1007 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1008 if ((error = xfs_bmbt_insert(cur, &i)))
1012 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1013 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1014 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1015 first, flist, &cur, 1, &tmp_rval,
1021 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1022 STARTBLOCKVAL(PREV.br_startblock) -
1023 (cur ? cur->bc_private.b.allocated : 0));
1024 ep = xfs_iext_get_ext(ifp, idx + 1);
1025 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
1026 XFS_BMAP_TRACE_POST_UPDATE("LF", ip, idx + 1, XFS_DATA_FORK);
1028 /* DELTA: One in-core extent is split in two. */
1029 temp = PREV.br_startoff;
1030 temp2 = PREV.br_blockcount;
1033 case MASK2(RIGHT_FILLING, RIGHT_CONTIG):
1035 * Filling in the last part of a previous delayed allocation.
1036 * The right neighbor is contiguous with the new allocation.
1038 temp = PREV.br_blockcount - new->br_blockcount;
1039 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx, XFS_DATA_FORK);
1040 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx + 1, XFS_DATA_FORK);
1041 xfs_bmbt_set_blockcount(ep, temp);
1042 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
1043 new->br_startoff, new->br_startblock,
1044 new->br_blockcount + RIGHT.br_blockcount,
1046 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx + 1, XFS_DATA_FORK);
1047 ip->i_df.if_lastex = idx + 1;
1049 rval = XFS_ILOG_DEXT;
1052 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1053 RIGHT.br_startblock,
1054 RIGHT.br_blockcount, &i)))
1057 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1059 new->br_blockcount +
1060 RIGHT.br_blockcount,
1064 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1065 STARTBLOCKVAL(PREV.br_startblock));
1066 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
1067 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx, XFS_DATA_FORK);
1069 /* DELTA: The boundary between two in-core extents moved. */
1070 temp = PREV.br_startoff;
1071 temp2 = PREV.br_blockcount +
1072 RIGHT.br_blockcount;
1075 case MASK(RIGHT_FILLING):
1077 * Filling in the last part of a previous delayed allocation.
1078 * The right neighbor is not contiguous.
1080 temp = PREV.br_blockcount - new->br_blockcount;
1081 XFS_BMAP_TRACE_PRE_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1082 xfs_bmbt_set_blockcount(ep, temp);
1083 XFS_BMAP_TRACE_INSERT("RF", ip, idx + 1, 1, new, NULL,
1085 xfs_iext_insert(ifp, idx + 1, 1, new);
1086 ip->i_df.if_lastex = idx + 1;
1087 ip->i_d.di_nextents++;
1089 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1091 rval = XFS_ILOG_CORE;
1092 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1093 new->br_startblock, new->br_blockcount,
1097 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1098 if ((error = xfs_bmbt_insert(cur, &i)))
1102 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1103 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1104 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1105 first, flist, &cur, 1, &tmp_rval,
1111 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
1112 STARTBLOCKVAL(PREV.br_startblock) -
1113 (cur ? cur->bc_private.b.allocated : 0));
1114 ep = xfs_iext_get_ext(ifp, idx);
1115 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
1116 XFS_BMAP_TRACE_POST_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1118 /* DELTA: One in-core extent is split in two. */
1119 temp = PREV.br_startoff;
1120 temp2 = PREV.br_blockcount;
1125 * Filling in the middle part of a previous delayed allocation.
1126 * Contiguity is impossible here.
1127 * This case is avoided almost all the time.
1129 temp = new->br_startoff - PREV.br_startoff;
1130 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, XFS_DATA_FORK);
1131 xfs_bmbt_set_blockcount(ep, temp);
1133 r[1].br_state = PREV.br_state;
1134 r[1].br_startblock = 0;
1135 r[1].br_startoff = new_endoff;
1136 temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff;
1137 r[1].br_blockcount = temp2;
1138 XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 2, &r[0], &r[1],
1140 xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
1141 ip->i_df.if_lastex = idx + 1;
1142 ip->i_d.di_nextents++;
1144 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1146 rval = XFS_ILOG_CORE;
1147 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1148 new->br_startblock, new->br_blockcount,
1152 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1153 if ((error = xfs_bmbt_insert(cur, &i)))
1157 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1158 ip->i_d.di_nextents > ip->i_df.if_ext_max) {
1159 error = xfs_bmap_extents_to_btree(ip->i_transp, ip,
1160 first, flist, &cur, 1, &tmp_rval,
1166 temp = xfs_bmap_worst_indlen(ip, temp);
1167 temp2 = xfs_bmap_worst_indlen(ip, temp2);
1168 diff = (int)(temp + temp2 - STARTBLOCKVAL(PREV.br_startblock) -
1169 (cur ? cur->bc_private.b.allocated : 0));
1171 xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS, -((int64_t)diff), rsvd)) {
1173 * Ick gross gag me with a spoon.
1175 ASSERT(0); /* want to see if this ever happens! */
1181 !xfs_mod_incore_sb(ip->i_mount,
1182 XFS_SBS_FDBLOCKS, -((int64_t)diff), rsvd))
1189 !xfs_mod_incore_sb(ip->i_mount,
1190 XFS_SBS_FDBLOCKS, -((int64_t)diff), rsvd))
1195 ep = xfs_iext_get_ext(ifp, idx);
1196 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
1197 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, XFS_DATA_FORK);
1198 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx + 2, XFS_DATA_FORK);
1199 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2),
1200 NULLSTARTBLOCK((int)temp2));
1201 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx + 2, XFS_DATA_FORK);
1202 *dnew = temp + temp2;
1203 /* DELTA: One in-core extent is split in three. */
1204 temp = PREV.br_startoff;
1205 temp2 = PREV.br_blockcount;
1208 case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1209 case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1210 case MASK2(LEFT_FILLING, RIGHT_CONTIG):
1211 case MASK2(RIGHT_FILLING, LEFT_CONTIG):
1212 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
1213 case MASK(LEFT_CONTIG):
1214 case MASK(RIGHT_CONTIG):
1216 * These cases are all impossible.
1223 if (delta->xed_startoff > temp)
1224 delta->xed_startoff = temp;
1225 if (delta->xed_blockcount < temp2)
1226 delta->xed_blockcount = temp2;
1240 #undef STATE_SET_TEST
1245 * Called by xfs_bmap_add_extent to handle cases converting an unwritten
1246 * allocation to a real allocation or vice versa.
1248 STATIC int /* error */
1249 xfs_bmap_add_extent_unwritten_real(
1250 xfs_inode_t *ip, /* incore inode pointer */
1251 xfs_extnum_t idx, /* extent number to update/insert */
1252 xfs_btree_cur_t **curp, /* if *curp is null, not a btree */
1253 xfs_bmbt_irec_t *new, /* new data to add to file extents */
1254 int *logflagsp, /* inode logging flags */
1255 xfs_extdelta_t *delta) /* Change made to incore extents */
1257 xfs_btree_cur_t *cur; /* btree cursor */
1258 xfs_bmbt_rec_host_t *ep; /* extent entry for idx */
1259 int error; /* error return value */
1260 int i; /* temp state */
1261 xfs_ifork_t *ifp; /* inode fork pointer */
1262 xfs_fileoff_t new_endoff; /* end offset of new entry */
1263 xfs_exntst_t newext; /* new extent state */
1264 xfs_exntst_t oldext; /* old extent state */
1265 xfs_bmbt_irec_t r[3]; /* neighbor extent entries */
1266 /* left is 0, right is 1, prev is 2 */
1267 int rval=0; /* return value (logging flags) */
1268 int state = 0;/* state bits, accessed thru macros */
1269 xfs_filblks_t temp=0;
1270 xfs_filblks_t temp2=0;
1271 enum { /* bit number definitions for state */
1272 LEFT_CONTIG, RIGHT_CONTIG,
1273 LEFT_FILLING, RIGHT_FILLING,
1274 LEFT_DELAY, RIGHT_DELAY,
1275 LEFT_VALID, RIGHT_VALID
1281 #define MASK(b) (1 << (b))
1282 #define MASK2(a,b) (MASK(a) | MASK(b))
1283 #define MASK3(a,b,c) (MASK2(a,b) | MASK(c))
1284 #define MASK4(a,b,c,d) (MASK3(a,b,c) | MASK(d))
1285 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
1286 #define STATE_TEST(b) (state & MASK(b))
1287 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
1288 ((state &= ~MASK(b)), 0))
1289 #define SWITCH_STATE \
1290 (state & MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG))
1293 * Set up a bunch of variables to make the tests simpler.
1297 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1298 ep = xfs_iext_get_ext(ifp, idx);
1299 xfs_bmbt_get_all(ep, &PREV);
1300 newext = new->br_state;
1301 oldext = (newext == XFS_EXT_UNWRITTEN) ?
1302 XFS_EXT_NORM : XFS_EXT_UNWRITTEN;
1303 ASSERT(PREV.br_state == oldext);
1304 new_endoff = new->br_startoff + new->br_blockcount;
1305 ASSERT(PREV.br_startoff <= new->br_startoff);
1306 ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff);
1308 * Set flags determining what part of the previous oldext allocation
1309 * extent is being replaced by a newext allocation.
1311 STATE_SET(LEFT_FILLING, PREV.br_startoff == new->br_startoff);
1312 STATE_SET(RIGHT_FILLING,
1313 PREV.br_startoff + PREV.br_blockcount == new_endoff);
1315 * Check and set flags if this segment has a left neighbor.
1316 * Don't set contiguous if the combined extent would be too large.
1318 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
1319 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT);
1320 STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(LEFT.br_startblock));
1322 STATE_SET(LEFT_CONTIG,
1323 STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
1324 LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff &&
1325 LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock &&
1326 LEFT.br_state == newext &&
1327 LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN);
1329 * Check and set flags if this segment has a right neighbor.
1330 * Don't set contiguous if the combined extent would be too large.
1331 * Also check for all-three-contiguous being too large.
1333 if (STATE_SET_TEST(RIGHT_VALID,
1335 ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1)) {
1336 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT);
1337 STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(RIGHT.br_startblock));
1339 STATE_SET(RIGHT_CONTIG,
1340 STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
1341 new_endoff == RIGHT.br_startoff &&
1342 new->br_startblock + new->br_blockcount ==
1343 RIGHT.br_startblock &&
1344 newext == RIGHT.br_state &&
1345 new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN &&
1346 ((state & MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING)) !=
1347 MASK3(LEFT_CONTIG, LEFT_FILLING, RIGHT_FILLING) ||
1348 LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount
1351 * Switch out based on the FILLING and CONTIG state bits.
1353 switch (SWITCH_STATE) {
1355 case MASK4(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1357 * Setting all of a previous oldext extent to newext.
1358 * The left and right neighbors are both contiguous with new.
1360 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC|RC", ip, idx - 1,
1362 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1363 LEFT.br_blockcount + PREV.br_blockcount +
1364 RIGHT.br_blockcount);
1365 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC|RC", ip, idx - 1,
1367 XFS_BMAP_TRACE_DELETE("LF|RF|LC|RC", ip, idx, 2, XFS_DATA_FORK);
1368 xfs_iext_remove(ifp, idx, 2);
1369 ip->i_df.if_lastex = idx - 1;
1370 ip->i_d.di_nextents -= 2;
1372 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1374 rval = XFS_ILOG_CORE;
1375 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1376 RIGHT.br_startblock,
1377 RIGHT.br_blockcount, &i)))
1380 if ((error = xfs_bmbt_delete(cur, &i)))
1383 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
1386 if ((error = xfs_bmbt_delete(cur, &i)))
1389 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
1392 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1394 LEFT.br_blockcount + PREV.br_blockcount +
1395 RIGHT.br_blockcount, LEFT.br_state)))
1398 /* DELTA: Three in-core extents are replaced by one. */
1399 temp = LEFT.br_startoff;
1400 temp2 = LEFT.br_blockcount +
1401 PREV.br_blockcount +
1402 RIGHT.br_blockcount;
1405 case MASK3(LEFT_FILLING, RIGHT_FILLING, LEFT_CONTIG):
1407 * Setting all of a previous oldext extent to newext.
1408 * The left neighbor is contiguous, the right is not.
1410 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|LC", ip, idx - 1,
1412 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1413 LEFT.br_blockcount + PREV.br_blockcount);
1414 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|LC", ip, idx - 1,
1416 ip->i_df.if_lastex = idx - 1;
1417 XFS_BMAP_TRACE_DELETE("LF|RF|LC", ip, idx, 1, XFS_DATA_FORK);
1418 xfs_iext_remove(ifp, idx, 1);
1419 ip->i_d.di_nextents--;
1421 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1423 rval = XFS_ILOG_CORE;
1424 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1425 PREV.br_startblock, PREV.br_blockcount,
1429 if ((error = xfs_bmbt_delete(cur, &i)))
1432 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
1435 if ((error = xfs_bmbt_update(cur, LEFT.br_startoff,
1437 LEFT.br_blockcount + PREV.br_blockcount,
1441 /* DELTA: Two in-core extents are replaced by one. */
1442 temp = LEFT.br_startoff;
1443 temp2 = LEFT.br_blockcount +
1447 case MASK3(LEFT_FILLING, RIGHT_FILLING, RIGHT_CONTIG):
1449 * Setting all of a previous oldext extent to newext.
1450 * The right neighbor is contiguous, the left is not.
1452 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF|RC", ip, idx,
1454 xfs_bmbt_set_blockcount(ep,
1455 PREV.br_blockcount + RIGHT.br_blockcount);
1456 xfs_bmbt_set_state(ep, newext);
1457 XFS_BMAP_TRACE_POST_UPDATE("LF|RF|RC", ip, idx,
1459 ip->i_df.if_lastex = idx;
1460 XFS_BMAP_TRACE_DELETE("LF|RF|RC", ip, idx + 1, 1, XFS_DATA_FORK);
1461 xfs_iext_remove(ifp, idx + 1, 1);
1462 ip->i_d.di_nextents--;
1464 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1466 rval = XFS_ILOG_CORE;
1467 if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff,
1468 RIGHT.br_startblock,
1469 RIGHT.br_blockcount, &i)))
1472 if ((error = xfs_bmbt_delete(cur, &i)))
1475 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
1478 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1480 new->br_blockcount + RIGHT.br_blockcount,
1484 /* DELTA: Two in-core extents are replaced by one. */
1485 temp = PREV.br_startoff;
1486 temp2 = PREV.br_blockcount +
1487 RIGHT.br_blockcount;
1490 case MASK2(LEFT_FILLING, RIGHT_FILLING):
1492 * Setting all of a previous oldext extent to newext.
1493 * Neither the left nor right neighbors are contiguous with
1496 XFS_BMAP_TRACE_PRE_UPDATE("LF|RF", ip, idx,
1498 xfs_bmbt_set_state(ep, newext);
1499 XFS_BMAP_TRACE_POST_UPDATE("LF|RF", ip, idx,
1501 ip->i_df.if_lastex = idx;
1503 rval = XFS_ILOG_DEXT;
1506 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1507 new->br_startblock, new->br_blockcount,
1511 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1512 new->br_startblock, new->br_blockcount,
1516 /* DELTA: The in-core extent described by new changed type. */
1517 temp = new->br_startoff;
1518 temp2 = new->br_blockcount;
1521 case MASK2(LEFT_FILLING, LEFT_CONTIG):
1523 * Setting the first part of a previous oldext extent to newext.
1524 * The left neighbor is contiguous.
1526 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx - 1,
1528 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
1529 LEFT.br_blockcount + new->br_blockcount);
1530 xfs_bmbt_set_startoff(ep,
1531 PREV.br_startoff + new->br_blockcount);
1532 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx - 1,
1534 XFS_BMAP_TRACE_PRE_UPDATE("LF|LC", ip, idx,
1536 xfs_bmbt_set_startblock(ep,
1537 new->br_startblock + new->br_blockcount);
1538 xfs_bmbt_set_blockcount(ep,
1539 PREV.br_blockcount - new->br_blockcount);
1540 XFS_BMAP_TRACE_POST_UPDATE("LF|LC", ip, idx,
1542 ip->i_df.if_lastex = idx - 1;
1544 rval = XFS_ILOG_DEXT;
1547 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1548 PREV.br_startblock, PREV.br_blockcount,
1552 if ((error = xfs_bmbt_update(cur,
1553 PREV.br_startoff + new->br_blockcount,
1554 PREV.br_startblock + new->br_blockcount,
1555 PREV.br_blockcount - new->br_blockcount,
1558 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
1560 if (xfs_bmbt_update(cur, LEFT.br_startoff,
1562 LEFT.br_blockcount + new->br_blockcount,
1566 /* DELTA: The boundary between two in-core extents moved. */
1567 temp = LEFT.br_startoff;
1568 temp2 = LEFT.br_blockcount +
1572 case MASK(LEFT_FILLING):
1574 * Setting the first part of a previous oldext extent to newext.
1575 * The left neighbor is not contiguous.
1577 XFS_BMAP_TRACE_PRE_UPDATE("LF", ip, idx, XFS_DATA_FORK);
1578 ASSERT(ep && xfs_bmbt_get_state(ep) == oldext);
1579 xfs_bmbt_set_startoff(ep, new_endoff);
1580 xfs_bmbt_set_blockcount(ep,
1581 PREV.br_blockcount - new->br_blockcount);
1582 xfs_bmbt_set_startblock(ep,
1583 new->br_startblock + new->br_blockcount);
1584 XFS_BMAP_TRACE_POST_UPDATE("LF", ip, idx, XFS_DATA_FORK);
1585 XFS_BMAP_TRACE_INSERT("LF", ip, idx, 1, new, NULL,
1587 xfs_iext_insert(ifp, idx, 1, new);
1588 ip->i_df.if_lastex = idx;
1589 ip->i_d.di_nextents++;
1591 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1593 rval = XFS_ILOG_CORE;
1594 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1595 PREV.br_startblock, PREV.br_blockcount,
1599 if ((error = xfs_bmbt_update(cur,
1600 PREV.br_startoff + new->br_blockcount,
1601 PREV.br_startblock + new->br_blockcount,
1602 PREV.br_blockcount - new->br_blockcount,
1605 cur->bc_rec.b = *new;
1606 if ((error = xfs_bmbt_insert(cur, &i)))
1610 /* DELTA: One in-core extent is split in two. */
1611 temp = PREV.br_startoff;
1612 temp2 = PREV.br_blockcount;
1615 case MASK2(RIGHT_FILLING, RIGHT_CONTIG):
1617 * Setting the last part of a previous oldext extent to newext.
1618 * The right neighbor is contiguous with the new allocation.
1620 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx,
1622 XFS_BMAP_TRACE_PRE_UPDATE("RF|RC", ip, idx + 1,
1624 xfs_bmbt_set_blockcount(ep,
1625 PREV.br_blockcount - new->br_blockcount);
1626 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx,
1628 xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1),
1629 new->br_startoff, new->br_startblock,
1630 new->br_blockcount + RIGHT.br_blockcount, newext);
1631 XFS_BMAP_TRACE_POST_UPDATE("RF|RC", ip, idx + 1,
1633 ip->i_df.if_lastex = idx + 1;
1635 rval = XFS_ILOG_DEXT;
1638 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1640 PREV.br_blockcount, &i)))
1643 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1645 PREV.br_blockcount - new->br_blockcount,
1648 if ((error = xfs_bmbt_increment(cur, 0, &i)))
1650 if ((error = xfs_bmbt_update(cur, new->br_startoff,
1652 new->br_blockcount + RIGHT.br_blockcount,
1656 /* DELTA: The boundary between two in-core extents moved. */
1657 temp = PREV.br_startoff;
1658 temp2 = PREV.br_blockcount +
1659 RIGHT.br_blockcount;
1662 case MASK(RIGHT_FILLING):
1664 * Setting the last part of a previous oldext extent to newext.
1665 * The right neighbor is not contiguous.
1667 XFS_BMAP_TRACE_PRE_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1668 xfs_bmbt_set_blockcount(ep,
1669 PREV.br_blockcount - new->br_blockcount);
1670 XFS_BMAP_TRACE_POST_UPDATE("RF", ip, idx, XFS_DATA_FORK);
1671 XFS_BMAP_TRACE_INSERT("RF", ip, idx + 1, 1, new, NULL,
1673 xfs_iext_insert(ifp, idx + 1, 1, new);
1674 ip->i_df.if_lastex = idx + 1;
1675 ip->i_d.di_nextents++;
1677 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1679 rval = XFS_ILOG_CORE;
1680 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1681 PREV.br_startblock, PREV.br_blockcount,
1685 if ((error = xfs_bmbt_update(cur, PREV.br_startoff,
1687 PREV.br_blockcount - new->br_blockcount,
1690 if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff,
1691 new->br_startblock, new->br_blockcount,
1695 cur->bc_rec.b.br_state = XFS_EXT_NORM;
1696 if ((error = xfs_bmbt_insert(cur, &i)))
1700 /* DELTA: One in-core extent is split in two. */
1701 temp = PREV.br_startoff;
1702 temp2 = PREV.br_blockcount;
1707 * Setting the middle part of a previous oldext extent to
1708 * newext. Contiguity is impossible here.
1709 * One extent becomes three extents.
1711 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, XFS_DATA_FORK);
1712 xfs_bmbt_set_blockcount(ep,
1713 new->br_startoff - PREV.br_startoff);
1714 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, XFS_DATA_FORK);
1716 r[1].br_startoff = new_endoff;
1717 r[1].br_blockcount =
1718 PREV.br_startoff + PREV.br_blockcount - new_endoff;
1719 r[1].br_startblock = new->br_startblock + new->br_blockcount;
1720 r[1].br_state = oldext;
1721 XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 2, &r[0], &r[1],
1723 xfs_iext_insert(ifp, idx + 1, 2, &r[0]);
1724 ip->i_df.if_lastex = idx + 1;
1725 ip->i_d.di_nextents += 2;
1727 rval = XFS_ILOG_CORE | XFS_ILOG_DEXT;
1729 rval = XFS_ILOG_CORE;
1730 if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff,
1731 PREV.br_startblock, PREV.br_blockcount,
1735 /* new right extent - oldext */
1736 if ((error = xfs_bmbt_update(cur, r[1].br_startoff,
1737 r[1].br_startblock, r[1].br_blockcount,
1740 /* new left extent - oldext */
1741 PREV.br_blockcount =
1742 new->br_startoff - PREV.br_startoff;
1743 cur->bc_rec.b = PREV;
1744 if ((error = xfs_bmbt_insert(cur, &i)))
1747 if ((error = xfs_bmbt_increment(cur, 0, &i)))
1750 /* new middle extent - newext */
1751 cur->bc_rec.b = *new;
1752 if ((error = xfs_bmbt_insert(cur, &i)))
1756 /* DELTA: One in-core extent is split in three. */
1757 temp = PREV.br_startoff;
1758 temp2 = PREV.br_blockcount;
1761 case MASK3(LEFT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1762 case MASK3(RIGHT_FILLING, LEFT_CONTIG, RIGHT_CONTIG):
1763 case MASK2(LEFT_FILLING, RIGHT_CONTIG):
1764 case MASK2(RIGHT_FILLING, LEFT_CONTIG):
1765 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
1766 case MASK(LEFT_CONTIG):
1767 case MASK(RIGHT_CONTIG):
1769 * These cases are all impossible.
1776 if (delta->xed_startoff > temp)
1777 delta->xed_startoff = temp;
1778 if (delta->xed_blockcount < temp2)
1779 delta->xed_blockcount = temp2;
1793 #undef STATE_SET_TEST
1798 * Called by xfs_bmap_add_extent to handle cases converting a hole
1799 * to a delayed allocation.
1802 STATIC int /* error */
1803 xfs_bmap_add_extent_hole_delay(
1804 xfs_inode_t *ip, /* incore inode pointer */
1805 xfs_extnum_t idx, /* extent number to update/insert */
1806 xfs_bmbt_irec_t *new, /* new data to add to file extents */
1807 int *logflagsp, /* inode logging flags */
1808 xfs_extdelta_t *delta, /* Change made to incore extents */
1809 int rsvd) /* OK to allocate reserved blocks */
1811 xfs_bmbt_rec_host_t *ep; /* extent record for idx */
1812 xfs_ifork_t *ifp; /* inode fork pointer */
1813 xfs_bmbt_irec_t left; /* left neighbor extent entry */
1814 xfs_filblks_t newlen=0; /* new indirect size */
1815 xfs_filblks_t oldlen=0; /* old indirect size */
1816 xfs_bmbt_irec_t right; /* right neighbor extent entry */
1817 int state; /* state bits, accessed thru macros */
1818 xfs_filblks_t temp=0; /* temp for indirect calculations */
1819 xfs_filblks_t temp2=0;
1820 enum { /* bit number definitions for state */
1821 LEFT_CONTIG, RIGHT_CONTIG,
1822 LEFT_DELAY, RIGHT_DELAY,
1823 LEFT_VALID, RIGHT_VALID
1826 #define MASK(b) (1 << (b))
1827 #define MASK2(a,b) (MASK(a) | MASK(b))
1828 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
1829 #define STATE_TEST(b) (state & MASK(b))
1830 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
1831 ((state &= ~MASK(b)), 0))
1832 #define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG))
1834 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1835 ep = xfs_iext_get_ext(ifp, idx);
1837 ASSERT(ISNULLSTARTBLOCK(new->br_startblock));
1839 * Check and set flags if this segment has a left neighbor
1841 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
1842 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
1843 STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(left.br_startblock));
1846 * Check and set flags if the current (right) segment exists.
1847 * If it doesn't exist, we're converting the hole at end-of-file.
1849 if (STATE_SET_TEST(RIGHT_VALID,
1851 ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
1852 xfs_bmbt_get_all(ep, &right);
1853 STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(right.br_startblock));
1856 * Set contiguity flags on the left and right neighbors.
1857 * Don't let extents get too large, even if the pieces are contiguous.
1859 STATE_SET(LEFT_CONTIG,
1860 STATE_TEST(LEFT_VALID) && STATE_TEST(LEFT_DELAY) &&
1861 left.br_startoff + left.br_blockcount == new->br_startoff &&
1862 left.br_blockcount + new->br_blockcount <= MAXEXTLEN);
1863 STATE_SET(RIGHT_CONTIG,
1864 STATE_TEST(RIGHT_VALID) && STATE_TEST(RIGHT_DELAY) &&
1865 new->br_startoff + new->br_blockcount == right.br_startoff &&
1866 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
1867 (!STATE_TEST(LEFT_CONTIG) ||
1868 (left.br_blockcount + new->br_blockcount +
1869 right.br_blockcount <= MAXEXTLEN)));
1871 * Switch out based on the contiguity flags.
1873 switch (SWITCH_STATE) {
1875 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
1877 * New allocation is contiguous with delayed allocations
1878 * on the left and on the right.
1879 * Merge all three into a single extent record.
1881 temp = left.br_blockcount + new->br_blockcount +
1882 right.br_blockcount;
1883 XFS_BMAP_TRACE_PRE_UPDATE("LC|RC", ip, idx - 1,
1885 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
1886 oldlen = STARTBLOCKVAL(left.br_startblock) +
1887 STARTBLOCKVAL(new->br_startblock) +
1888 STARTBLOCKVAL(right.br_startblock);
1889 newlen = xfs_bmap_worst_indlen(ip, temp);
1890 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
1891 NULLSTARTBLOCK((int)newlen));
1892 XFS_BMAP_TRACE_POST_UPDATE("LC|RC", ip, idx - 1,
1894 XFS_BMAP_TRACE_DELETE("LC|RC", ip, idx, 1, XFS_DATA_FORK);
1895 xfs_iext_remove(ifp, idx, 1);
1896 ip->i_df.if_lastex = idx - 1;
1897 /* DELTA: Two in-core extents were replaced by one. */
1899 temp = left.br_startoff;
1902 case MASK(LEFT_CONTIG):
1904 * New allocation is contiguous with a delayed allocation
1906 * Merge the new allocation with the left neighbor.
1908 temp = left.br_blockcount + new->br_blockcount;
1909 XFS_BMAP_TRACE_PRE_UPDATE("LC", ip, idx - 1,
1911 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp);
1912 oldlen = STARTBLOCKVAL(left.br_startblock) +
1913 STARTBLOCKVAL(new->br_startblock);
1914 newlen = xfs_bmap_worst_indlen(ip, temp);
1915 xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1),
1916 NULLSTARTBLOCK((int)newlen));
1917 XFS_BMAP_TRACE_POST_UPDATE("LC", ip, idx - 1,
1919 ip->i_df.if_lastex = idx - 1;
1920 /* DELTA: One in-core extent grew into a hole. */
1922 temp = left.br_startoff;
1925 case MASK(RIGHT_CONTIG):
1927 * New allocation is contiguous with a delayed allocation
1929 * Merge the new allocation with the right neighbor.
1931 XFS_BMAP_TRACE_PRE_UPDATE("RC", ip, idx, XFS_DATA_FORK);
1932 temp = new->br_blockcount + right.br_blockcount;
1933 oldlen = STARTBLOCKVAL(new->br_startblock) +
1934 STARTBLOCKVAL(right.br_startblock);
1935 newlen = xfs_bmap_worst_indlen(ip, temp);
1936 xfs_bmbt_set_allf(ep, new->br_startoff,
1937 NULLSTARTBLOCK((int)newlen), temp, right.br_state);
1938 XFS_BMAP_TRACE_POST_UPDATE("RC", ip, idx, XFS_DATA_FORK);
1939 ip->i_df.if_lastex = idx;
1940 /* DELTA: One in-core extent grew into a hole. */
1942 temp = new->br_startoff;
1947 * New allocation is not contiguous with another
1948 * delayed allocation.
1949 * Insert a new entry.
1951 oldlen = newlen = 0;
1952 XFS_BMAP_TRACE_INSERT("0", ip, idx, 1, new, NULL,
1954 xfs_iext_insert(ifp, idx, 1, new);
1955 ip->i_df.if_lastex = idx;
1956 /* DELTA: A new in-core extent was added in a hole. */
1957 temp2 = new->br_blockcount;
1958 temp = new->br_startoff;
1961 if (oldlen != newlen) {
1962 ASSERT(oldlen > newlen);
1963 xfs_mod_incore_sb(ip->i_mount, XFS_SBS_FDBLOCKS,
1964 (int64_t)(oldlen - newlen), rsvd);
1966 * Nothing to do for disk quota accounting here.
1971 if (delta->xed_startoff > temp)
1972 delta->xed_startoff = temp;
1973 if (delta->xed_blockcount < temp2)
1974 delta->xed_blockcount = temp2;
1982 #undef STATE_SET_TEST
1987 * Called by xfs_bmap_add_extent to handle cases converting a hole
1988 * to a real allocation.
1990 STATIC int /* error */
1991 xfs_bmap_add_extent_hole_real(
1992 xfs_inode_t *ip, /* incore inode pointer */
1993 xfs_extnum_t idx, /* extent number to update/insert */
1994 xfs_btree_cur_t *cur, /* if null, not a btree */
1995 xfs_bmbt_irec_t *new, /* new data to add to file extents */
1996 int *logflagsp, /* inode logging flags */
1997 xfs_extdelta_t *delta, /* Change made to incore extents */
1998 int whichfork) /* data or attr fork */
2000 xfs_bmbt_rec_host_t *ep; /* pointer to extent entry ins. point */
2001 int error; /* error return value */
2002 int i; /* temp state */
2003 xfs_ifork_t *ifp; /* inode fork pointer */
2004 xfs_bmbt_irec_t left; /* left neighbor extent entry */
2005 xfs_bmbt_irec_t right; /* right neighbor extent entry */
2006 int rval=0; /* return value (logging flags) */
2007 int state; /* state bits, accessed thru macros */
2008 xfs_filblks_t temp=0;
2009 xfs_filblks_t temp2=0;
2010 enum { /* bit number definitions for state */
2011 LEFT_CONTIG, RIGHT_CONTIG,
2012 LEFT_DELAY, RIGHT_DELAY,
2013 LEFT_VALID, RIGHT_VALID
2016 #define MASK(b) (1 << (b))
2017 #define MASK2(a,b) (MASK(a) | MASK(b))
2018 #define STATE_SET(b,v) ((v) ? (state |= MASK(b)) : (state &= ~MASK(b)))
2019 #define STATE_TEST(b) (state & MASK(b))
2020 #define STATE_SET_TEST(b,v) ((v) ? ((state |= MASK(b)), 1) : \
2021 ((state &= ~MASK(b)), 0))
2022 #define SWITCH_STATE (state & MASK2(LEFT_CONTIG, RIGHT_CONTIG))
2024 ifp = XFS_IFORK_PTR(ip, whichfork);
2025 ASSERT(idx <= ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t));
2026 ep = xfs_iext_get_ext(ifp, idx);
2029 * Check and set flags if this segment has a left neighbor.
2031 if (STATE_SET_TEST(LEFT_VALID, idx > 0)) {
2032 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left);
2033 STATE_SET(LEFT_DELAY, ISNULLSTARTBLOCK(left.br_startblock));
2036 * Check and set flags if this segment has a current value.
2037 * Not true if we're inserting into the "hole" at eof.
2039 if (STATE_SET_TEST(RIGHT_VALID,
2041 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
2042 xfs_bmbt_get_all(ep, &right);
2043 STATE_SET(RIGHT_DELAY, ISNULLSTARTBLOCK(right.br_startblock));
2046 * We're inserting a real allocation between "left" and "right".
2047 * Set the contiguity flags. Don't let extents get too large.
2049 STATE_SET(LEFT_CONTIG,
2050 STATE_TEST(LEFT_VALID) && !STATE_TEST(LEFT_DELAY) &&
2051 left.br_startoff + left.br_blockcount == new->br_startoff &&
2052 left.br_startblock + left.br_blockcount == new->br_startblock &&
2053 left.br_state == new->br_state &&
2054 left.br_blockcount + new->br_blockcount <= MAXEXTLEN);
2055 STATE_SET(RIGHT_CONTIG,
2056 STATE_TEST(RIGHT_VALID) && !STATE_TEST(RIGHT_DELAY) &&
2057 new->br_startoff + new->br_blockcount == right.br_startoff &&
2058 new->br_startblock + new->br_blockcount ==
2059 right.br_startblock &&
2060 new->br_state == right.br_state &&
2061 new->br_blockcount + right.br_blockcount <= MAXEXTLEN &&
2062 (!STATE_TEST(LEFT_CONTIG) ||
2063 left.br_blockcount + new->br_blockcount +
2064 right.br_blockcount <= MAXEXTLEN));
2068 * Select which case we're in here, and implement it.
2070 switch (SWITCH_STATE) {
2072 case MASK2(LEFT_CONTIG, RIGHT_CONTIG):
2074 * New allocation is contiguous with real allocations on the
2075 * left and on the right.
2076 * Merge all three into a single extent record.
2078 XFS_BMAP_TRACE_PRE_UPDATE("LC|RC", ip, idx - 1,
2080 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
2081 left.br_blockcount + new->br_blockcount +
2082 right.br_blockcount);
2083 XFS_BMAP_TRACE_POST_UPDATE("LC|RC", ip, idx - 1,
2085 XFS_BMAP_TRACE_DELETE("LC|RC", ip, idx, 1, whichfork);
2086 xfs_iext_remove(ifp, idx, 1);
2087 ifp->if_lastex = idx - 1;
2088 XFS_IFORK_NEXT_SET(ip, whichfork,
2089 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
2091 rval = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
2093 rval = XFS_ILOG_CORE;
2094 if ((error = xfs_bmbt_lookup_eq(cur,
2096 right.br_startblock,
2097 right.br_blockcount, &i)))
2100 if ((error = xfs_bmbt_delete(cur, &i)))
2103 if ((error = xfs_bmbt_decrement(cur, 0, &i)))
2106 if ((error = xfs_bmbt_update(cur, left.br_startoff,
2108 left.br_blockcount +
2109 new->br_blockcount +
2110 right.br_blockcount,
2114 /* DELTA: Two in-core extents were replaced by one. */
2115 temp = left.br_startoff;
2116 temp2 = left.br_blockcount +
2117 new->br_blockcount +
2118 right.br_blockcount;
2121 case MASK(LEFT_CONTIG):
2123 * New allocation is contiguous with a real allocation
2125 * Merge the new allocation with the left neighbor.
2127 XFS_BMAP_TRACE_PRE_UPDATE("LC", ip, idx - 1, whichfork);
2128 xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1),
2129 left.br_blockcount + new->br_blockcount);
2130 XFS_BMAP_TRACE_POST_UPDATE("LC", ip, idx - 1, whichfork);
2131 ifp->if_lastex = idx - 1;
2133 rval = XFS_ILOG_FEXT(whichfork);
2136 if ((error = xfs_bmbt_lookup_eq(cur,
2139 left.br_blockcount, &i)))
2142 if ((error = xfs_bmbt_update(cur, left.br_startoff,
2144 left.br_blockcount +
2149 /* DELTA: One in-core extent grew. */
2150 temp = left.br_startoff;
2151 temp2 = left.br_blockcount +
2155 case MASK(RIGHT_CONTIG):
2157 * New allocation is contiguous with a real allocation
2159 * Merge the new allocation with the right neighbor.
2161 XFS_BMAP_TRACE_PRE_UPDATE("RC", ip, idx, whichfork);
2162 xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock,
2163 new->br_blockcount + right.br_blockcount,
2165 XFS_BMAP_TRACE_POST_UPDATE("RC", ip, idx, whichfork);
2166 ifp->if_lastex = idx;
2168 rval = XFS_ILOG_FEXT(whichfork);
2171 if ((error = xfs_bmbt_lookup_eq(cur,
2173 right.br_startblock,
2174 right.br_blockcount, &i)))
2177 if ((error = xfs_bmbt_update(cur, new->br_startoff,
2179 new->br_blockcount +
2180 right.br_blockcount,
2184 /* DELTA: One in-core extent grew. */
2185 temp = new->br_startoff;
2186 temp2 = new->br_blockcount +
2187 right.br_blockcount;
2192 * New allocation is not contiguous with another
2194 * Insert a new entry.
2196 XFS_BMAP_TRACE_INSERT("0", ip, idx, 1, new, NULL, whichfork);
2197 xfs_iext_insert(ifp, idx, 1, new);
2198 ifp->if_lastex = idx;
2199 XFS_IFORK_NEXT_SET(ip, whichfork,
2200 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
2202 rval = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
2204 rval = XFS_ILOG_CORE;
2205 if ((error = xfs_bmbt_lookup_eq(cur,
2208 new->br_blockcount, &i)))
2211 cur->bc_rec.b.br_state = new->br_state;
2212 if ((error = xfs_bmbt_insert(cur, &i)))
2216 /* DELTA: A new extent was added in a hole. */
2217 temp = new->br_startoff;
2218 temp2 = new->br_blockcount;
2223 if (delta->xed_startoff > temp)
2224 delta->xed_startoff = temp;
2225 if (delta->xed_blockcount < temp2)
2226 delta->xed_blockcount = temp2;
2235 #undef STATE_SET_TEST
2240 * Adjust the size of the new extent based on di_extsize and rt extsize.
2243 xfs_bmap_extsize_align(
2245 xfs_bmbt_irec_t *gotp, /* next extent pointer */
2246 xfs_bmbt_irec_t *prevp, /* previous extent pointer */
2247 xfs_extlen_t extsz, /* align to this extent size */
2248 int rt, /* is this a realtime inode? */
2249 int eof, /* is extent at end-of-file? */
2250 int delay, /* creating delalloc extent? */
2251 int convert, /* overwriting unwritten extent? */
2252 xfs_fileoff_t *offp, /* in/out: aligned offset */
2253 xfs_extlen_t *lenp) /* in/out: aligned length */
2255 xfs_fileoff_t orig_off; /* original offset */
2256 xfs_extlen_t orig_alen; /* original length */
2257 xfs_fileoff_t orig_end; /* original off+len */
2258 xfs_fileoff_t nexto; /* next file offset */
2259 xfs_fileoff_t prevo; /* previous file offset */
2260 xfs_fileoff_t align_off; /* temp for offset */
2261 xfs_extlen_t align_alen; /* temp for length */
2262 xfs_extlen_t temp; /* temp for calculations */
2267 orig_off = align_off = *offp;
2268 orig_alen = align_alen = *lenp;
2269 orig_end = orig_off + orig_alen;
2272 * If this request overlaps an existing extent, then don't
2273 * attempt to perform any additional alignment.
2275 if (!delay && !eof &&
2276 (orig_off >= gotp->br_startoff) &&
2277 (orig_end <= gotp->br_startoff + gotp->br_blockcount)) {
2282 * If the file offset is unaligned vs. the extent size
2283 * we need to align it. This will be possible unless
2284 * the file was previously written with a kernel that didn't
2285 * perform this alignment, or if a truncate shot us in the
2288 temp = do_mod(orig_off, extsz);
2294 * Same adjustment for the end of the requested area.
2296 if ((temp = (align_alen % extsz))) {
2297 align_alen += extsz - temp;
2300 * If the previous block overlaps with this proposed allocation
2301 * then move the start forward without adjusting the length.
2303 if (prevp->br_startoff != NULLFILEOFF) {
2304 if (prevp->br_startblock == HOLESTARTBLOCK)
2305 prevo = prevp->br_startoff;
2307 prevo = prevp->br_startoff + prevp->br_blockcount;
2310 if (align_off != orig_off && align_off < prevo)
2313 * If the next block overlaps with this proposed allocation
2314 * then move the start back without adjusting the length,
2315 * but not before offset 0.
2316 * This may of course make the start overlap previous block,
2317 * and if we hit the offset 0 limit then the next block
2318 * can still overlap too.
2320 if (!eof && gotp->br_startoff != NULLFILEOFF) {
2321 if ((delay && gotp->br_startblock == HOLESTARTBLOCK) ||
2322 (!delay && gotp->br_startblock == DELAYSTARTBLOCK))
2323 nexto = gotp->br_startoff + gotp->br_blockcount;
2325 nexto = gotp->br_startoff;
2327 nexto = NULLFILEOFF;
2329 align_off + align_alen != orig_end &&
2330 align_off + align_alen > nexto)
2331 align_off = nexto > align_alen ? nexto - align_alen : 0;
2333 * If we're now overlapping the next or previous extent that
2334 * means we can't fit an extsz piece in this hole. Just move
2335 * the start forward to the first valid spot and set
2336 * the length so we hit the end.
2338 if (align_off != orig_off && align_off < prevo)
2340 if (align_off + align_alen != orig_end &&
2341 align_off + align_alen > nexto &&
2342 nexto != NULLFILEOFF) {
2343 ASSERT(nexto > prevo);
2344 align_alen = nexto - align_off;
2348 * If realtime, and the result isn't a multiple of the realtime
2349 * extent size we need to remove blocks until it is.
2351 if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) {
2353 * We're not covering the original request, or
2354 * we won't be able to once we fix the length.
2356 if (orig_off < align_off ||
2357 orig_end > align_off + align_alen ||
2358 align_alen - temp < orig_alen)
2359 return XFS_ERROR(EINVAL);
2361 * Try to fix it by moving the start up.
2363 if (align_off + temp <= orig_off) {
2368 * Try to fix it by moving the end in.
2370 else if (align_off + align_alen - temp >= orig_end)
2373 * Set the start to the minimum then trim the length.
2376 align_alen -= orig_off - align_off;
2377 align_off = orig_off;
2378 align_alen -= align_alen % mp->m_sb.sb_rextsize;
2381 * Result doesn't cover the request, fail it.
2383 if (orig_off < align_off || orig_end > align_off + align_alen)
2384 return XFS_ERROR(EINVAL);
2386 ASSERT(orig_off >= align_off);
2387 ASSERT(orig_end <= align_off + align_alen);
2391 if (!eof && gotp->br_startoff != NULLFILEOFF)
2392 ASSERT(align_off + align_alen <= gotp->br_startoff);
2393 if (prevp->br_startoff != NULLFILEOFF)
2394 ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount);
2402 #define XFS_ALLOC_GAP_UNITS 4
2406 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2408 xfs_fsblock_t adjust; /* adjustment to block numbers */
2409 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
2410 xfs_mount_t *mp; /* mount point structure */
2411 int nullfb; /* true if ap->firstblock isn't set */
2412 int rt; /* true if inode is realtime */
2414 #define ISVALID(x,y) \
2416 (x) < mp->m_sb.sb_rblocks : \
2417 XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \
2418 XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \
2419 XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks)
2421 mp = ap->ip->i_mount;
2422 nullfb = ap->firstblock == NULLFSBLOCK;
2423 rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata;
2424 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
2426 * If allocating at eof, and there's a previous real block,
2427 * try to use it's last block as our starting point.
2429 if (ap->eof && ap->prevp->br_startoff != NULLFILEOFF &&
2430 !ISNULLSTARTBLOCK(ap->prevp->br_startblock) &&
2431 ISVALID(ap->prevp->br_startblock + ap->prevp->br_blockcount,
2432 ap->prevp->br_startblock)) {
2433 ap->rval = ap->prevp->br_startblock + ap->prevp->br_blockcount;
2435 * Adjust for the gap between prevp and us.
2438 (ap->prevp->br_startoff + ap->prevp->br_blockcount);
2440 ISVALID(ap->rval + adjust, ap->prevp->br_startblock))
2444 * If not at eof, then compare the two neighbor blocks.
2445 * Figure out whether either one gives us a good starting point,
2446 * and pick the better one.
2448 else if (!ap->eof) {
2449 xfs_fsblock_t gotbno; /* right side block number */
2450 xfs_fsblock_t gotdiff=0; /* right side difference */
2451 xfs_fsblock_t prevbno; /* left side block number */
2452 xfs_fsblock_t prevdiff=0; /* left side difference */
2455 * If there's a previous (left) block, select a requested
2456 * start block based on it.
2458 if (ap->prevp->br_startoff != NULLFILEOFF &&
2459 !ISNULLSTARTBLOCK(ap->prevp->br_startblock) &&
2460 (prevbno = ap->prevp->br_startblock +
2461 ap->prevp->br_blockcount) &&
2462 ISVALID(prevbno, ap->prevp->br_startblock)) {
2464 * Calculate gap to end of previous block.
2466 adjust = prevdiff = ap->off -
2467 (ap->prevp->br_startoff +
2468 ap->prevp->br_blockcount);
2470 * Figure the startblock based on the previous block's
2471 * end and the gap size.
2473 * If the gap is large relative to the piece we're
2474 * allocating, or using it gives us an invalid block
2475 * number, then just use the end of the previous block.
2477 if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
2478 ISVALID(prevbno + prevdiff,
2479 ap->prevp->br_startblock))
2484 * If the firstblock forbids it, can't use it,
2487 if (!rt && !nullfb &&
2488 XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno)
2489 prevbno = NULLFSBLOCK;
2492 * No previous block or can't follow it, just default.
2495 prevbno = NULLFSBLOCK;
2497 * If there's a following (right) block, select a requested
2498 * start block based on it.
2500 if (!ISNULLSTARTBLOCK(ap->gotp->br_startblock)) {
2502 * Calculate gap to start of next block.
2504 adjust = gotdiff = ap->gotp->br_startoff - ap->off;
2506 * Figure the startblock based on the next block's
2507 * start and the gap size.
2509 gotbno = ap->gotp->br_startblock;
2512 * If the gap is large relative to the piece we're
2513 * allocating, or using it gives us an invalid block
2514 * number, then just use the start of the next block
2515 * offset by our length.
2517 if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->alen &&
2518 ISVALID(gotbno - gotdiff, gotbno))
2520 else if (ISVALID(gotbno - ap->alen, gotbno)) {
2522 gotdiff += adjust - ap->alen;
2526 * If the firstblock forbids it, can't use it,
2529 if (!rt && !nullfb &&
2530 XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno)
2531 gotbno = NULLFSBLOCK;
2534 * No next block, just default.
2537 gotbno = NULLFSBLOCK;
2539 * If both valid, pick the better one, else the only good
2540 * one, else ap->rval is already set (to 0 or the inode block).
2542 if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
2543 ap->rval = prevdiff <= gotdiff ? prevbno : gotbno;
2544 else if (prevbno != NULLFSBLOCK)
2546 else if (gotbno != NULLFSBLOCK)
2555 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2557 xfs_alloctype_t atype = 0; /* type for allocation routines */
2558 int error; /* error return value */
2559 xfs_mount_t *mp; /* mount point structure */
2560 xfs_extlen_t prod = 0; /* product factor for allocators */
2561 xfs_extlen_t ralen = 0; /* realtime allocation length */
2562 xfs_extlen_t align; /* minimum allocation alignment */
2565 mp = ap->ip->i_mount;
2566 align = xfs_get_extsz_hint(ap->ip);
2567 prod = align / mp->m_sb.sb_rextsize;
2568 error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
2569 align, 1, ap->eof, 0,
2570 ap->conv, &ap->off, &ap->alen);
2574 ASSERT(ap->alen % mp->m_sb.sb_rextsize == 0);
2577 * If the offset & length are not perfectly aligned
2578 * then kill prod, it will just get us in trouble.
2580 if (do_mod(ap->off, align) || ap->alen % align)
2583 * Set ralen to be the actual requested length in rtextents.
2585 ralen = ap->alen / mp->m_sb.sb_rextsize;
2587 * If the old value was close enough to MAXEXTLEN that
2588 * we rounded up to it, cut it back so it's valid again.
2589 * Note that if it's a really large request (bigger than
2590 * MAXEXTLEN), we don't hear about that number, and can't
2591 * adjust the starting point to match it.
2593 if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
2594 ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
2596 * If it's an allocation to an empty file at offset 0,
2597 * pick an extent that will space things out in the rt area.
2599 if (ap->eof && ap->off == 0) {
2600 xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */
2602 error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
2605 ap->rval = rtx * mp->m_sb.sb_rextsize;
2610 xfs_bmap_adjacent(ap);
2613 * Realtime allocation, done through xfs_rtallocate_extent.
2615 atype = ap->rval == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
2616 do_div(ap->rval, mp->m_sb.sb_rextsize);
2619 if ((error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, ap->alen,
2620 &ralen, atype, ap->wasdel, prod, &rtb)))
2622 if (rtb == NULLFSBLOCK && prod > 1 &&
2623 (error = xfs_rtallocate_extent(ap->tp, ap->rval, 1,
2624 ap->alen, &ralen, atype,
2625 ap->wasdel, 1, &rtb)))
2628 if (ap->rval != NULLFSBLOCK) {
2629 ap->rval *= mp->m_sb.sb_rextsize;
2630 ralen *= mp->m_sb.sb_rextsize;
2632 ap->ip->i_d.di_nblocks += ralen;
2633 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2635 ap->ip->i_delayed_blks -= ralen;
2637 * Adjust the disk quota also. This was reserved
2640 XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
2641 ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
2642 XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
2651 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2653 xfs_mount_t *mp; /* mount point structure */
2654 xfs_alloctype_t atype = 0; /* type for allocation routines */
2655 xfs_extlen_t align; /* minimum allocation alignment */
2657 xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */
2658 xfs_agnumber_t startag;
2659 xfs_alloc_arg_t args;
2662 xfs_extlen_t longest;
2664 xfs_extlen_t nextminlen = 0;
2666 int nullfb; /* true if ap->firstblock isn't set */
2672 mp = ap->ip->i_mount;
2673 align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0;
2674 if (unlikely(align)) {
2675 error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp,
2676 align, 0, ap->eof, 0, ap->conv,
2677 &ap->off, &ap->alen);
2681 nullfb = ap->firstblock == NULLFSBLOCK;
2682 fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock);
2684 if (ap->userdata && xfs_inode_is_filestream(ap->ip)) {
2685 ag = xfs_filestream_lookup_ag(ap->ip);
2686 ag = (ag != NULLAGNUMBER) ? ag : 0;
2687 ap->rval = XFS_AGB_TO_FSB(mp, ag, 0);
2689 ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino);
2692 ap->rval = ap->firstblock;
2694 xfs_bmap_adjacent(ap);
2697 * If allowed, use ap->rval; otherwise must use firstblock since
2698 * it's in the right allocation group.
2700 if (nullfb || XFS_FSB_TO_AGNO(mp, ap->rval) == fb_agno)
2703 ap->rval = ap->firstblock;
2705 * Normal allocation, done through xfs_alloc_vextent.
2707 tryagain = isaligned = 0;
2710 args.fsbno = ap->rval;
2711 args.maxlen = MIN(ap->alen, mp->m_sb.sb_agblocks);
2712 args.firstblock = ap->firstblock;
2715 if (ap->userdata && xfs_inode_is_filestream(ap->ip))
2716 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2718 args.type = XFS_ALLOCTYPE_START_BNO;
2719 args.total = ap->total;
2722 * Search for an allocation group with a single extent
2723 * large enough for the request.
2725 * If one isn't found, then adjust the minimum allocation
2726 * size to the largest space found.
2728 startag = ag = XFS_FSB_TO_AGNO(mp, args.fsbno);
2729 if (startag == NULLAGNUMBER)
2732 down_read(&mp->m_peraglock);
2733 while (blen < ap->alen) {
2734 pag = &mp->m_perag[ag];
2735 if (!pag->pagf_init &&
2736 (error = xfs_alloc_pagf_init(mp, args.tp,
2737 ag, XFS_ALLOC_FLAG_TRYLOCK))) {
2738 up_read(&mp->m_peraglock);
2742 * See xfs_alloc_fix_freelist...
2744 if (pag->pagf_init) {
2745 need = XFS_MIN_FREELIST_PAG(pag, mp);
2746 delta = need > pag->pagf_flcount ?
2747 need - pag->pagf_flcount : 0;
2748 longest = (pag->pagf_longest > delta) ?
2749 (pag->pagf_longest - delta) :
2750 (pag->pagf_flcount > 0 ||
2751 pag->pagf_longest > 0);
2757 if (xfs_inode_is_filestream(ap->ip)) {
2758 if (blen >= ap->alen)
2763 * If startag is an invalid AG, we've
2764 * come here once before and
2765 * xfs_filestream_new_ag picked the
2766 * best currently available.
2768 * Don't continue looping, since we
2769 * could loop forever.
2771 if (startag == NULLAGNUMBER)
2774 error = xfs_filestream_new_ag(ap, &ag);
2776 up_read(&mp->m_peraglock);
2780 /* loop again to set 'blen'*/
2781 startag = NULLAGNUMBER;
2785 if (++ag == mp->m_sb.sb_agcount)
2790 up_read(&mp->m_peraglock);
2792 * Since the above loop did a BUF_TRYLOCK, it is
2793 * possible that there is space for this request.
2795 if (notinit || blen < ap->minlen)
2796 args.minlen = ap->minlen;
2798 * If the best seen length is less than the request
2799 * length, use the best as the minimum.
2801 else if (blen < ap->alen)
2804 * Otherwise we've seen an extent as big as alen,
2805 * use that as the minimum.
2808 args.minlen = ap->alen;
2811 * set the failure fallback case to look in the selected
2812 * AG as the stream may have moved.
2814 if (xfs_inode_is_filestream(ap->ip))
2815 ap->rval = args.fsbno = XFS_AGB_TO_FSB(mp, ag, 0);
2816 } else if (ap->low) {
2817 if (xfs_inode_is_filestream(ap->ip))
2818 args.type = XFS_ALLOCTYPE_FIRST_AG;
2820 args.type = XFS_ALLOCTYPE_START_BNO;
2821 args.total = args.minlen = ap->minlen;
2823 args.type = XFS_ALLOCTYPE_NEAR_BNO;
2824 args.total = ap->total;
2825 args.minlen = ap->minlen;
2827 /* apply extent size hints if obtained earlier */
2828 if (unlikely(align)) {
2830 if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod)))
2831 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2832 } else if (mp->m_sb.sb_blocksize >= NBPP) {
2836 args.prod = NBPP >> mp->m_sb.sb_blocklog;
2837 if ((args.mod = (xfs_extlen_t)(do_mod(ap->off, args.prod))))
2838 args.mod = (xfs_extlen_t)(args.prod - args.mod);
2841 * If we are not low on available data blocks, and the
2842 * underlying logical volume manager is a stripe, and
2843 * the file offset is zero then try to allocate data
2844 * blocks on stripe unit boundary.
2845 * NOTE: ap->aeof is only set if the allocation length
2846 * is >= the stripe unit and the allocation offset is
2847 * at the end of file.
2849 if (!ap->low && ap->aeof) {
2851 args.alignment = mp->m_dalign;
2855 * Adjust for alignment
2857 if (blen > args.alignment && blen <= ap->alen)
2858 args.minlen = blen - args.alignment;
2859 args.minalignslop = 0;
2862 * First try an exact bno allocation.
2863 * If it fails then do a near or start bno
2864 * allocation with alignment turned on.
2868 args.type = XFS_ALLOCTYPE_THIS_BNO;
2871 * Compute the minlen+alignment for the
2872 * next case. Set slop so that the value
2873 * of minlen+alignment+slop doesn't go up
2874 * between the calls.
2876 if (blen > mp->m_dalign && blen <= ap->alen)
2877 nextminlen = blen - mp->m_dalign;
2879 nextminlen = args.minlen;
2880 if (nextminlen + mp->m_dalign > args.minlen + 1)
2882 nextminlen + mp->m_dalign -
2885 args.minalignslop = 0;
2889 args.minalignslop = 0;
2891 args.minleft = ap->minleft;
2892 args.wasdel = ap->wasdel;
2894 args.userdata = ap->userdata;
2895 if ((error = xfs_alloc_vextent(&args)))
2897 if (tryagain && args.fsbno == NULLFSBLOCK) {
2899 * Exact allocation failed. Now try with alignment
2903 args.fsbno = ap->rval;
2904 args.alignment = mp->m_dalign;
2905 args.minlen = nextminlen;
2906 args.minalignslop = 0;
2908 if ((error = xfs_alloc_vextent(&args)))
2911 if (isaligned && args.fsbno == NULLFSBLOCK) {
2913 * allocation failed, so turn off alignment and
2917 args.fsbno = ap->rval;
2919 if ((error = xfs_alloc_vextent(&args)))
2922 if (args.fsbno == NULLFSBLOCK && nullfb &&
2923 args.minlen > ap->minlen) {
2924 args.minlen = ap->minlen;
2925 args.type = XFS_ALLOCTYPE_START_BNO;
2926 args.fsbno = ap->rval;
2927 if ((error = xfs_alloc_vextent(&args)))
2930 if (args.fsbno == NULLFSBLOCK && nullfb) {
2932 args.type = XFS_ALLOCTYPE_FIRST_AG;
2933 args.total = ap->minlen;
2935 if ((error = xfs_alloc_vextent(&args)))
2939 if (args.fsbno != NULLFSBLOCK) {
2940 ap->firstblock = ap->rval = args.fsbno;
2941 ASSERT(nullfb || fb_agno == args.agno ||
2942 (ap->low && fb_agno < args.agno));
2943 ap->alen = args.len;
2944 ap->ip->i_d.di_nblocks += args.len;
2945 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
2947 ap->ip->i_delayed_blks -= args.len;
2949 * Adjust the disk quota also. This was reserved
2952 XFS_TRANS_MOD_DQUOT_BYINO(mp, ap->tp, ap->ip,
2953 ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT :
2954 XFS_TRANS_DQ_BCOUNT,
2957 ap->rval = NULLFSBLOCK;
2964 * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file.
2965 * It figures out where to ask the underlying allocator to put the new extent.
2969 xfs_bmalloca_t *ap) /* bmap alloc argument struct */
2971 if ((ap->ip->i_d.di_flags & XFS_DIFLAG_REALTIME) && ap->userdata)
2972 return xfs_bmap_rtalloc(ap);
2973 return xfs_bmap_btalloc(ap);
2977 * Transform a btree format file with only one leaf node, where the
2978 * extents list will fit in the inode, into an extents format file.
2979 * Since the file extents are already in-core, all we have to do is
2980 * give up the space for the btree root and pitch the leaf block.
2982 STATIC int /* error */
2983 xfs_bmap_btree_to_extents(
2984 xfs_trans_t *tp, /* transaction pointer */
2985 xfs_inode_t *ip, /* incore inode pointer */
2986 xfs_btree_cur_t *cur, /* btree cursor */
2987 int *logflagsp, /* inode logging flags */
2988 int whichfork) /* data or attr fork */
2991 xfs_bmbt_block_t *cblock;/* child btree block */
2992 xfs_fsblock_t cbno; /* child block number */
2993 xfs_buf_t *cbp; /* child block's buffer */
2994 int error; /* error return value */
2995 xfs_ifork_t *ifp; /* inode fork data */
2996 xfs_mount_t *mp; /* mount point structure */
2997 __be64 *pp; /* ptr to block address */
2998 xfs_bmbt_block_t *rblock;/* root btree block */
3000 ifp = XFS_IFORK_PTR(ip, whichfork);
3001 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
3002 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
3003 rblock = ifp->if_broot;
3004 ASSERT(be16_to_cpu(rblock->bb_level) == 1);
3005 ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
3006 ASSERT(XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes) == 1);
3008 pp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, ifp->if_broot_bytes);
3009 cbno = be64_to_cpu(*pp);
3012 if ((error = xfs_btree_check_lptr(cur, cbno, 1)))
3015 if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp,
3016 XFS_BMAP_BTREE_REF)))
3018 cblock = XFS_BUF_TO_BMBT_BLOCK(cbp);
3019 if ((error = xfs_btree_check_lblock(cur, cblock, 0, cbp)))
3021 xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp);
3022 ip->i_d.di_nblocks--;
3023 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
3024 xfs_trans_binval(tp, cbp);
3025 if (cur->bc_bufs[0] == cbp)
3026 cur->bc_bufs[0] = NULL;
3027 xfs_iroot_realloc(ip, -1, whichfork);
3028 ASSERT(ifp->if_broot == NULL);
3029 ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
3030 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3031 *logflagsp = XFS_ILOG_CORE | XFS_ILOG_FEXT(whichfork);
3036 * Called by xfs_bmapi to update file extent records and the btree
3037 * after removing space (or undoing a delayed allocation).
3039 STATIC int /* error */
3040 xfs_bmap_del_extent(
3041 xfs_inode_t *ip, /* incore inode pointer */
3042 xfs_trans_t *tp, /* current transaction pointer */
3043 xfs_extnum_t idx, /* extent number to update/delete */
3044 xfs_bmap_free_t *flist, /* list of extents to be freed */
3045 xfs_btree_cur_t *cur, /* if null, not a btree */
3046 xfs_bmbt_irec_t *del, /* data to remove from extents */
3047 int *logflagsp, /* inode logging flags */
3048 xfs_extdelta_t *delta, /* Change made to incore extents */
3049 int whichfork, /* data or attr fork */
3050 int rsvd) /* OK to allocate reserved blocks */
3052 xfs_filblks_t da_new; /* new delay-alloc indirect blocks */
3053 xfs_filblks_t da_old; /* old delay-alloc indirect blocks */
3054 xfs_fsblock_t del_endblock=0; /* first block past del */
3055 xfs_fileoff_t del_endoff; /* first offset past del */
3056 int delay; /* current block is delayed allocated */
3057 int do_fx; /* free extent at end of routine */
3058 xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */
3059 int error; /* error return value */
3060 int flags; /* inode logging flags */
3061 xfs_bmbt_irec_t got; /* current extent entry */
3062 xfs_fileoff_t got_endoff; /* first offset past got */
3063 int i; /* temp state */
3064 xfs_ifork_t *ifp; /* inode fork pointer */
3065 xfs_mount_t *mp; /* mount structure */
3066 xfs_filblks_t nblks; /* quota/sb block count */
3067 xfs_bmbt_irec_t new; /* new record to be inserted */
3069 uint qfield; /* quota field to update */
3070 xfs_filblks_t temp; /* for indirect length calculations */
3071 xfs_filblks_t temp2; /* for indirect length calculations */
3073 XFS_STATS_INC(xs_del_exlist);
3075 ifp = XFS_IFORK_PTR(ip, whichfork);
3076 ASSERT((idx >= 0) && (idx < ifp->if_bytes /
3077 (uint)sizeof(xfs_bmbt_rec_t)));
3078 ASSERT(del->br_blockcount > 0);
3079 ep = xfs_iext_get_ext(ifp, idx);
3080 xfs_bmbt_get_all(ep, &got);
3081 ASSERT(got.br_startoff <= del->br_startoff);
3082 del_endoff = del->br_startoff + del->br_blockcount;
3083 got_endoff = got.br_startoff + got.br_blockcount;
3084 ASSERT(got_endoff >= del_endoff);
3085 delay = ISNULLSTARTBLOCK(got.br_startblock);
3086 ASSERT(ISNULLSTARTBLOCK(del->br_startblock) == delay);
3091 * If deleting a real allocation, must free up the disk space.
3094 flags = XFS_ILOG_CORE;
3096 * Realtime allocation. Free it and record di_nblocks update.
3098 if (whichfork == XFS_DATA_FORK &&
3099 (ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) {
3103 ASSERT(do_mod(del->br_blockcount,
3104 mp->m_sb.sb_rextsize) == 0);
3105 ASSERT(do_mod(del->br_startblock,
3106 mp->m_sb.sb_rextsize) == 0);
3107 bno = del->br_startblock;
3108 len = del->br_blockcount;
3109 do_div(bno, mp->m_sb.sb_rextsize);
3110 do_div(len, mp->m_sb.sb_rextsize);
3111 if ((error = xfs_rtfree_extent(ip->i_transp, bno,
3112 (xfs_extlen_t)len)))
3115 nblks = len * mp->m_sb.sb_rextsize;
3116 qfield = XFS_TRANS_DQ_RTBCOUNT;
3119 * Ordinary allocation.
3123 nblks = del->br_blockcount;
3124 qfield = XFS_TRANS_DQ_BCOUNT;
3127 * Set up del_endblock and cur for later.
3129 del_endblock = del->br_startblock + del->br_blockcount;
3131 if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff,
3132 got.br_startblock, got.br_blockcount,
3137 da_old = da_new = 0;
3139 da_old = STARTBLOCKVAL(got.br_startblock);
3145 * Set flag value to use in switch statement.
3146 * Left-contig is 2, right-contig is 1.
3148 switch (((got.br_startoff == del->br_startoff) << 1) |
3149 (got_endoff == del_endoff)) {
3152 * Matches the whole extent. Delete the entry.
3154 XFS_BMAP_TRACE_DELETE("3", ip, idx, 1, whichfork);
3155 xfs_iext_remove(ifp, idx, 1);
3156 ifp->if_lastex = idx;
3159 XFS_IFORK_NEXT_SET(ip, whichfork,
3160 XFS_IFORK_NEXTENTS(ip, whichfork) - 1);
3161 flags |= XFS_ILOG_CORE;
3163 flags |= XFS_ILOG_FEXT(whichfork);
3166 if ((error = xfs_bmbt_delete(cur, &i)))
3173 * Deleting the first part of the extent.
3175 XFS_BMAP_TRACE_PRE_UPDATE("2", ip, idx, whichfork);
3176 xfs_bmbt_set_startoff(ep, del_endoff);
3177 temp = got.br_blockcount - del->br_blockcount;
3178 xfs_bmbt_set_blockcount(ep, temp);
3179 ifp->if_lastex = idx;
3181 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
3183 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
3184 XFS_BMAP_TRACE_POST_UPDATE("2", ip, idx,
3189 xfs_bmbt_set_startblock(ep, del_endblock);
3190 XFS_BMAP_TRACE_POST_UPDATE("2", ip, idx, whichfork);
3192 flags |= XFS_ILOG_FEXT(whichfork);
3195 if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock,
3196 got.br_blockcount - del->br_blockcount,
3203 * Deleting the last part of the extent.
3205 temp = got.br_blockcount - del->br_blockcount;
3206 XFS_BMAP_TRACE_PRE_UPDATE("1", ip, idx, whichfork);
3207 xfs_bmbt_set_blockcount(ep, temp);
3208 ifp->if_lastex = idx;
3210 temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
3212 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
3213 XFS_BMAP_TRACE_POST_UPDATE("1", ip, idx,
3218 XFS_BMAP_TRACE_POST_UPDATE("1", ip, idx, whichfork);
3220 flags |= XFS_ILOG_FEXT(whichfork);
3223 if ((error = xfs_bmbt_update(cur, got.br_startoff,
3225 got.br_blockcount - del->br_blockcount,
3232 * Deleting the middle of the extent.
3234 temp = del->br_startoff - got.br_startoff;
3235 XFS_BMAP_TRACE_PRE_UPDATE("0", ip, idx, whichfork);
3236 xfs_bmbt_set_blockcount(ep, temp);
3237 new.br_startoff = del_endoff;
3238 temp2 = got_endoff - del_endoff;
3239 new.br_blockcount = temp2;
3240 new.br_state = got.br_state;
3242 new.br_startblock = del_endblock;
3243 flags |= XFS_ILOG_CORE;
3245 if ((error = xfs_bmbt_update(cur,
3247 got.br_startblock, temp,
3250 if ((error = xfs_bmbt_increment(cur, 0, &i)))
3252 cur->bc_rec.b = new;
3253 error = xfs_bmbt_insert(cur, &i);
3254 if (error && error != ENOSPC)
3257 * If get no-space back from btree insert,
3258 * it tried a split, and we have a zero
3259 * block reservation.
3260 * Fix up our state and return the error.
3262 if (error == ENOSPC) {
3264 * Reset the cursor, don't trust
3265 * it after any insert operation.
3267 if ((error = xfs_bmbt_lookup_eq(cur,
3274 * Update the btree record back
3275 * to the original value.
3277 if ((error = xfs_bmbt_update(cur,
3284 * Reset the extent record back
3285 * to the original value.
3287 xfs_bmbt_set_blockcount(ep,
3290 error = XFS_ERROR(ENOSPC);
3295 flags |= XFS_ILOG_FEXT(whichfork);
3296 XFS_IFORK_NEXT_SET(ip, whichfork,
3297 XFS_IFORK_NEXTENTS(ip, whichfork) + 1);
3299 ASSERT(whichfork == XFS_DATA_FORK);
3300 temp = xfs_bmap_worst_indlen(ip, temp);
3301 xfs_bmbt_set_startblock(ep, NULLSTARTBLOCK((int)temp));
3302 temp2 = xfs_bmap_worst_indlen(ip, temp2);
3303 new.br_startblock = NULLSTARTBLOCK((int)temp2);
3304 da_new = temp + temp2;
3305 while (da_new > da_old) {
3309 xfs_bmbt_set_startblock(ep,
3310 NULLSTARTBLOCK((int)temp));
3312 if (da_new == da_old)
3318 NULLSTARTBLOCK((int)temp2);
3322 XFS_BMAP_TRACE_POST_UPDATE("0", ip, idx, whichfork);
3323 XFS_BMAP_TRACE_INSERT("0", ip, idx + 1, 1, &new, NULL,
3325 xfs_iext_insert(ifp, idx + 1, 1, &new);
3326 ifp->if_lastex = idx + 1;
3330 * If we need to, add to list of extents to delete.
3333 xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist,
3336 * Adjust inode # blocks in the file.
3339 ip->i_d.di_nblocks -= nblks;
3341 * Adjust quota data.
3344 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, qfield, (long)-nblks);
3347 * Account for change in delayed indirect blocks.
3348 * Nothing to do for disk quota accounting here.
3350 ASSERT(da_old >= da_new);
3351 if (da_old > da_new)
3352 xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS, (int64_t)(da_old - da_new),
3355 /* DELTA: report the original extent. */
3356 if (delta->xed_startoff > got.br_startoff)
3357 delta->xed_startoff = got.br_startoff;
3358 if (delta->xed_blockcount < got.br_startoff+got.br_blockcount)
3359 delta->xed_blockcount = got.br_startoff +
3368 * Remove the entry "free" from the free item list. Prev points to the
3369 * previous entry, unless "free" is the head of the list.
3373 xfs_bmap_free_t *flist, /* free item list header */
3374 xfs_bmap_free_item_t *prev, /* previous item on list, if any */
3375 xfs_bmap_free_item_t *free) /* list item to be freed */
3378 prev->xbfi_next = free->xbfi_next;
3380 flist->xbf_first = free->xbfi_next;
3382 kmem_zone_free(xfs_bmap_free_item_zone, free);
3386 * Convert an extents-format file into a btree-format file.
3387 * The new file will have a root block (in the inode) and a single child block.
3389 STATIC int /* error */
3390 xfs_bmap_extents_to_btree(
3391 xfs_trans_t *tp, /* transaction pointer */
3392 xfs_inode_t *ip, /* incore inode pointer */
3393 xfs_fsblock_t *firstblock, /* first-block-allocated */
3394 xfs_bmap_free_t *flist, /* blocks freed in xaction */
3395 xfs_btree_cur_t **curp, /* cursor returned to caller */
3396 int wasdel, /* converting a delayed alloc */
3397 int *logflagsp, /* inode logging flags */
3398 int whichfork) /* data or attr fork */
3400 xfs_bmbt_block_t *ablock; /* allocated (child) bt block */
3401 xfs_buf_t *abp; /* buffer for ablock */
3402 xfs_alloc_arg_t args; /* allocation arguments */
3403 xfs_bmbt_rec_t *arp; /* child record pointer */
3404 xfs_bmbt_block_t *block; /* btree root block */
3405 xfs_btree_cur_t *cur; /* bmap btree cursor */
3406 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
3407 int error; /* error return value */
3408 xfs_extnum_t i, cnt; /* extent record index */
3409 xfs_ifork_t *ifp; /* inode fork pointer */
3410 xfs_bmbt_key_t *kp; /* root block key pointer */
3411 xfs_mount_t *mp; /* mount structure */
3412 xfs_extnum_t nextents; /* number of file extents */
3413 xfs_bmbt_ptr_t *pp; /* root block address pointer */
3415 ifp = XFS_IFORK_PTR(ip, whichfork);
3416 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS);
3417 ASSERT(ifp->if_ext_max ==
3418 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
3420 * Make space in the inode incore.
3422 xfs_iroot_realloc(ip, 1, whichfork);
3423 ifp->if_flags |= XFS_IFBROOT;
3427 block = ifp->if_broot;
3428 block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3429 block->bb_level = cpu_to_be16(1);
3430 block->bb_numrecs = cpu_to_be16(1);
3431 block->bb_leftsib = cpu_to_be64(NULLDFSBNO);
3432 block->bb_rightsib = cpu_to_be64(NULLDFSBNO);
3434 * Need a cursor. Can't allocate until bb_level is filled in.
3437 cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip,
3439 cur->bc_private.b.firstblock = *firstblock;
3440 cur->bc_private.b.flist = flist;
3441 cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0;
3443 * Convert to a btree with two levels, one record in root.
3445 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE);
3448 args.firstblock = *firstblock;
3449 if (*firstblock == NULLFSBLOCK) {
3450 args.type = XFS_ALLOCTYPE_START_BNO;
3451 args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino);
3452 } else if (flist->xbf_low) {
3453 args.type = XFS_ALLOCTYPE_START_BNO;
3454 args.fsbno = *firstblock;
3456 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3457 args.fsbno = *firstblock;
3459 args.minlen = args.maxlen = args.prod = 1;
3460 args.total = args.minleft = args.alignment = args.mod = args.isfl =
3461 args.minalignslop = 0;
3462 args.wasdel = wasdel;
3464 if ((error = xfs_alloc_vextent(&args))) {
3465 xfs_iroot_realloc(ip, -1, whichfork);
3466 xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
3470 * Allocation can't fail, the space was reserved.
3472 ASSERT(args.fsbno != NULLFSBLOCK);
3473 ASSERT(*firstblock == NULLFSBLOCK ||
3474 args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) ||
3476 args.agno > XFS_FSB_TO_AGNO(mp, *firstblock)));
3477 *firstblock = cur->bc_private.b.firstblock = args.fsbno;
3478 cur->bc_private.b.allocated++;
3479 ip->i_d.di_nblocks++;
3480 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
3481 abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
3483 * Fill in the child block.
3485 ablock = XFS_BUF_TO_BMBT_BLOCK(abp);
3486 ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
3487 ablock->bb_level = 0;
3488 ablock->bb_leftsib = cpu_to_be64(NULLDFSBNO);
3489 ablock->bb_rightsib = cpu_to_be64(NULLDFSBNO);
3490 arp = XFS_BMAP_REC_IADDR(ablock, 1, cur);
3491 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
3492 for (cnt = i = 0; i < nextents; i++) {
3493 ep = xfs_iext_get_ext(ifp, i);
3494 if (!ISNULLSTARTBLOCK(xfs_bmbt_get_startblock(ep))) {
3495 arp->l0 = INT_GET(ep->l0, ARCH_CONVERT);
3496 arp->l1 = INT_GET(ep->l1, ARCH_CONVERT);
3500 ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork));
3501 ablock->bb_numrecs = cpu_to_be16(cnt);
3503 * Fill in the root key and pointer.
3505 kp = XFS_BMAP_KEY_IADDR(block, 1, cur);
3506 arp = XFS_BMAP_REC_IADDR(ablock, 1, cur);
3507 kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp));
3508 pp = XFS_BMAP_PTR_IADDR(block, 1, cur);
3509 *pp = cpu_to_be64(args.fsbno);
3511 * Do all this logging at the end so that
3512 * the root is at the right level.
3514 xfs_bmbt_log_block(cur, abp, XFS_BB_ALL_BITS);
3515 xfs_bmbt_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs));
3516 ASSERT(*curp == NULL);
3518 *logflagsp = XFS_ILOG_CORE | XFS_ILOG_FBROOT(whichfork);
3523 * Helper routine to reset inode di_forkoff field when switching
3524 * attribute fork from local to extent format - we reset it where
3525 * possible to make space available for inline data fork extents.
3528 xfs_bmap_forkoff_reset(
3533 if (whichfork == XFS_ATTR_FORK &&
3534 (ip->i_d.di_format != XFS_DINODE_FMT_DEV) &&
3535 (ip->i_d.di_format != XFS_DINODE_FMT_UUID) &&
3536 (ip->i_d.di_format != XFS_DINODE_FMT_BTREE) &&
3537 ((mp->m_attroffset >> 3) > ip->i_d.di_forkoff)) {
3538 ip->i_d.di_forkoff = mp->m_attroffset >> 3;
3539 ip->i_df.if_ext_max = XFS_IFORK_DSIZE(ip) /
3540 (uint)sizeof(xfs_bmbt_rec_t);
3541 ip->i_afp->if_ext_max = XFS_IFORK_ASIZE(ip) /
3542 (uint)sizeof(xfs_bmbt_rec_t);
3547 * Convert a local file to an extents file.
3548 * This code is out of bounds for data forks of regular files,
3549 * since the file data needs to get logged so things will stay consistent.
3550 * (The bmap-level manipulations are ok, though).
3552 STATIC int /* error */
3553 xfs_bmap_local_to_extents(
3554 xfs_trans_t *tp, /* transaction pointer */
3555 xfs_inode_t *ip, /* incore inode pointer */
3556 xfs_fsblock_t *firstblock, /* first block allocated in xaction */
3557 xfs_extlen_t total, /* total blocks needed by transaction */
3558 int *logflagsp, /* inode logging flags */
3559 int whichfork) /* data or attr fork */
3561 int error; /* error return value */
3562 int flags; /* logging flags returned */
3563 xfs_ifork_t *ifp; /* inode fork pointer */
3566 * We don't want to deal with the case of keeping inode data inline yet.
3567 * So sending the data fork of a regular inode is invalid.
3569 ASSERT(!((ip->i_d.di_mode & S_IFMT) == S_IFREG &&
3570 whichfork == XFS_DATA_FORK));
3571 ifp = XFS_IFORK_PTR(ip, whichfork);
3572 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
3575 if (ifp->if_bytes) {
3576 xfs_alloc_arg_t args; /* allocation arguments */
3577 xfs_buf_t *bp; /* buffer for extent block */
3578 xfs_bmbt_rec_host_t *ep;/* extent record pointer */
3581 args.mp = ip->i_mount;
3582 args.firstblock = *firstblock;
3583 ASSERT((ifp->if_flags &
3584 (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE);
3586 * Allocate a block. We know we need only one, since the
3587 * file currently fits in an inode.
3589 if (*firstblock == NULLFSBLOCK) {
3590 args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino);
3591 args.type = XFS_ALLOCTYPE_START_BNO;
3593 args.fsbno = *firstblock;
3594 args.type = XFS_ALLOCTYPE_NEAR_BNO;
3597 args.mod = args.minleft = args.alignment = args.wasdel =
3598 args.isfl = args.minalignslop = 0;
3599 args.minlen = args.maxlen = args.prod = 1;
3600 if ((error = xfs_alloc_vextent(&args)))
3603 * Can't fail, the space was reserved.
3605 ASSERT(args.fsbno != NULLFSBLOCK);
3606 ASSERT(args.len == 1);
3607 *firstblock = args.fsbno;
3608 bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
3609 memcpy((char *)XFS_BUF_PTR(bp), ifp->if_u1.if_data,
3611 xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1);
3612 xfs_bmap_forkoff_reset(args.mp, ip, whichfork);
3613 xfs_idata_realloc(ip, -ifp->if_bytes, whichfork);
3614 xfs_iext_add(ifp, 0, 1);
3615 ep = xfs_iext_get_ext(ifp, 0);
3616 xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM);
3617 XFS_BMAP_TRACE_POST_UPDATE("new", ip, 0, whichfork);
3618 XFS_IFORK_NEXT_SET(ip, whichfork, 1);
3619 ip->i_d.di_nblocks = 1;
3620 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, tp, ip,
3621 XFS_TRANS_DQ_BCOUNT, 1L);
3622 flags |= XFS_ILOG_FEXT(whichfork);
3624 ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0);
3625 xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork);
3627 ifp->if_flags &= ~XFS_IFINLINE;
3628 ifp->if_flags |= XFS_IFEXTENTS;
3629 XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
3630 flags |= XFS_ILOG_CORE;
3637 * Search the extent records for the entry containing block bno.
3638 * If bno lies in a hole, point to the next entry. If bno lies
3639 * past eof, *eofp will be set, and *prevp will contain the last
3640 * entry (null if none). Else, *lastxp will be set to the index
3641 * of the found entry; *gotp will contain the entry.
3643 xfs_bmbt_rec_host_t * /* pointer to found extent entry */
3644 xfs_bmap_search_multi_extents(
3645 xfs_ifork_t *ifp, /* inode fork pointer */
3646 xfs_fileoff_t bno, /* block number searched for */
3647 int *eofp, /* out: end of file found */
3648 xfs_extnum_t *lastxp, /* out: last extent index */
3649 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
3650 xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
3652 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
3653 xfs_extnum_t lastx; /* last extent index */
3656 * Initialize the extent entry structure to catch access to
3657 * uninitialized br_startblock field.
3659 gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL;
3660 gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL;
3661 gotp->br_state = XFS_EXT_INVALID;
3663 gotp->br_startblock = 0xffffa5a5a5a5a5a5LL;
3665 gotp->br_startblock = 0xffffa5a5;
3667 prevp->br_startoff = NULLFILEOFF;
3669 ep = xfs_iext_bno_to_ext(ifp, bno, &lastx);
3671 xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
3673 if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
3674 xfs_bmbt_get_all(ep, gotp);
3688 * Search the extents list for the inode, for the extent containing bno.
3689 * If bno lies in a hole, point to the next entry. If bno lies past eof,
3690 * *eofp will be set, and *prevp will contain the last entry (null if none).
3691 * Else, *lastxp will be set to the index of the found
3692 * entry; *gotp will contain the entry.
3694 STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */
3695 xfs_bmap_search_extents(
3696 xfs_inode_t *ip, /* incore inode pointer */
3697 xfs_fileoff_t bno, /* block number searched for */
3698 int fork, /* data or attr fork */
3699 int *eofp, /* out: end of file found */
3700 xfs_extnum_t *lastxp, /* out: last extent index */
3701 xfs_bmbt_irec_t *gotp, /* out: extent entry found */
3702 xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */
3704 xfs_ifork_t *ifp; /* inode fork pointer */
3705 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
3707 XFS_STATS_INC(xs_look_exlist);
3708 ifp = XFS_IFORK_PTR(ip, fork);
3710 ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp);
3712 if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) &&
3713 !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) {
3714 xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount,
3715 "Access to block zero in inode %llu "
3716 "start_block: %llx start_off: %llx "
3717 "blkcnt: %llx extent-state: %x lastx: %x\n",
3718 (unsigned long long)ip->i_ino,
3719 (unsigned long long)gotp->br_startblock,
3720 (unsigned long long)gotp->br_startoff,
3721 (unsigned long long)gotp->br_blockcount,
3722 gotp->br_state, *lastxp);
3723 *lastxp = NULLEXTNUM;
3731 #ifdef XFS_BMAP_TRACE
3732 ktrace_t *xfs_bmap_trace_buf;
3735 * Add a bmap trace buffer entry. Base routine for the others.
3738 xfs_bmap_trace_addentry(
3739 int opcode, /* operation */
3740 const char *fname, /* function name */
3741 char *desc, /* operation description */
3742 xfs_inode_t *ip, /* incore inode pointer */
3743 xfs_extnum_t idx, /* index of entry(ies) */
3744 xfs_extnum_t cnt, /* count of entries, 1 or 2 */
3745 xfs_bmbt_rec_host_t *r1, /* first record */
3746 xfs_bmbt_rec_host_t *r2, /* second record or null */
3747 int whichfork) /* data or attr fork */
3749 xfs_bmbt_rec_host_t tr2;
3751 ASSERT(cnt == 1 || cnt == 2);
3756 memset(&tr2, 0, sizeof(tr2));
3759 ktrace_enter(xfs_bmap_trace_buf,
3760 (void *)(__psint_t)(opcode | (whichfork << 16)),
3761 (void *)fname, (void *)desc, (void *)ip,
3762 (void *)(__psint_t)idx,
3763 (void *)(__psint_t)cnt,
3764 (void *)(__psunsigned_t)(ip->i_ino >> 32),
3765 (void *)(__psunsigned_t)(unsigned)ip->i_ino,
3766 (void *)(__psunsigned_t)(r1->l0 >> 32),
3767 (void *)(__psunsigned_t)(unsigned)(r1->l0),
3768 (void *)(__psunsigned_t)(r1->l1 >> 32),
3769 (void *)(__psunsigned_t)(unsigned)(r1->l1),
3770 (void *)(__psunsigned_t)(r2->l0 >> 32),
3771 (void *)(__psunsigned_t)(unsigned)(r2->l0),
3772 (void *)(__psunsigned_t)(r2->l1 >> 32),
3773 (void *)(__psunsigned_t)(unsigned)(r2->l1)
3775 ASSERT(ip->i_xtrace);
3776 ktrace_enter(ip->i_xtrace,
3777 (void *)(__psint_t)(opcode | (whichfork << 16)),
3778 (void *)fname, (void *)desc, (void *)ip,
3779 (void *)(__psint_t)idx,
3780 (void *)(__psint_t)cnt,
3781 (void *)(__psunsigned_t)(ip->i_ino >> 32),
3782 (void *)(__psunsigned_t)(unsigned)ip->i_ino,
3783 (void *)(__psunsigned_t)(r1->l0 >> 32),
3784 (void *)(__psunsigned_t)(unsigned)(r1->l0),
3785 (void *)(__psunsigned_t)(r1->l1 >> 32),
3786 (void *)(__psunsigned_t)(unsigned)(r1->l1),
3787 (void *)(__psunsigned_t)(r2->l0 >> 32),
3788 (void *)(__psunsigned_t)(unsigned)(r2->l0),
3789 (void *)(__psunsigned_t)(r2->l1 >> 32),
3790 (void *)(__psunsigned_t)(unsigned)(r2->l1)
3795 * Add bmap trace entry prior to a call to xfs_iext_remove.
3798 xfs_bmap_trace_delete(
3799 const char *fname, /* function name */
3800 char *desc, /* operation description */
3801 xfs_inode_t *ip, /* incore inode pointer */
3802 xfs_extnum_t idx, /* index of entry(entries) deleted */
3803 xfs_extnum_t cnt, /* count of entries deleted, 1 or 2 */
3804 int whichfork) /* data or attr fork */
3806 xfs_ifork_t *ifp; /* inode fork pointer */
3808 ifp = XFS_IFORK_PTR(ip, whichfork);
3809 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_DELETE, fname, desc, ip, idx,
3810 cnt, xfs_iext_get_ext(ifp, idx),
3811 cnt == 2 ? xfs_iext_get_ext(ifp, idx + 1) : NULL,
3816 * Add bmap trace entry prior to a call to xfs_iext_insert, or
3817 * reading in the extents list from the disk (in the btree).
3820 xfs_bmap_trace_insert(
3821 const char *fname, /* function name */
3822 char *desc, /* operation description */
3823 xfs_inode_t *ip, /* incore inode pointer */
3824 xfs_extnum_t idx, /* index of entry(entries) inserted */
3825 xfs_extnum_t cnt, /* count of entries inserted, 1 or 2 */
3826 xfs_bmbt_irec_t *r1, /* inserted record 1 */
3827 xfs_bmbt_irec_t *r2, /* inserted record 2 or null */
3828 int whichfork) /* data or attr fork */
3830 xfs_bmbt_rec_host_t tr1; /* compressed record 1 */
3831 xfs_bmbt_rec_host_t tr2; /* compressed record 2 if needed */
3833 xfs_bmbt_set_all(&tr1, r1);
3836 xfs_bmbt_set_all(&tr2, r2);
3841 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_INSERT, fname, desc, ip, idx,
3842 cnt, &tr1, cnt == 2 ? &tr2 : NULL, whichfork);
3846 * Add bmap trace entry after updating an extent record in place.
3849 xfs_bmap_trace_post_update(
3850 const char *fname, /* function name */
3851 char *desc, /* operation description */
3852 xfs_inode_t *ip, /* incore inode pointer */
3853 xfs_extnum_t idx, /* index of entry updated */
3854 int whichfork) /* data or attr fork */
3856 xfs_ifork_t *ifp; /* inode fork pointer */
3858 ifp = XFS_IFORK_PTR(ip, whichfork);
3859 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_POST_UP, fname, desc, ip, idx,
3860 1, xfs_iext_get_ext(ifp, idx), NULL, whichfork);
3864 * Add bmap trace entry prior to updating an extent record in place.
3867 xfs_bmap_trace_pre_update(
3868 const char *fname, /* function name */
3869 char *desc, /* operation description */
3870 xfs_inode_t *ip, /* incore inode pointer */
3871 xfs_extnum_t idx, /* index of entry to be updated */
3872 int whichfork) /* data or attr fork */
3874 xfs_ifork_t *ifp; /* inode fork pointer */
3876 ifp = XFS_IFORK_PTR(ip, whichfork);
3877 xfs_bmap_trace_addentry(XFS_BMAP_KTRACE_PRE_UP, fname, desc, ip, idx, 1,
3878 xfs_iext_get_ext(ifp, idx), NULL, whichfork);
3880 #endif /* XFS_BMAP_TRACE */
3883 * Compute the worst-case number of indirect blocks that will be used
3884 * for ip's delayed extent of length "len".
3886 STATIC xfs_filblks_t
3887 xfs_bmap_worst_indlen(
3888 xfs_inode_t *ip, /* incore inode pointer */
3889 xfs_filblks_t len) /* delayed extent length */
3891 int level; /* btree level number */
3892 int maxrecs; /* maximum record count at this level */
3893 xfs_mount_t *mp; /* mount structure */
3894 xfs_filblks_t rval; /* return value */
3897 maxrecs = mp->m_bmap_dmxr[0];
3898 for (level = 0, rval = 0;
3899 level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
3902 do_div(len, maxrecs);
3905 return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) -
3908 maxrecs = mp->m_bmap_dmxr[1];
3913 #if defined(XFS_RW_TRACE)
3922 if (ip->i_rwtrace == NULL)
3924 ktrace_enter(ip->i_rwtrace,
3925 (void *)(__psint_t)XFS_BUNMAP,
3927 (void *)(__psint_t)((ip->i_d.di_size >> 32) & 0xffffffff),
3928 (void *)(__psint_t)(ip->i_d.di_size & 0xffffffff),
3929 (void *)(__psint_t)(((xfs_dfiloff_t)bno >> 32) & 0xffffffff),
3930 (void *)(__psint_t)((xfs_dfiloff_t)bno & 0xffffffff),
3931 (void *)(__psint_t)len,
3932 (void *)(__psint_t)flags,
3933 (void *)(unsigned long)current_cpu(),
3945 * Convert inode from non-attributed to attributed.
3946 * Must not be in a transaction, ip must not be locked.
3948 int /* error code */
3949 xfs_bmap_add_attrfork(
3950 xfs_inode_t *ip, /* incore inode pointer */
3951 int size, /* space new attribute needs */
3952 int rsvd) /* xact may use reserved blks */
3954 xfs_fsblock_t firstblock; /* 1st block/ag allocated */
3955 xfs_bmap_free_t flist; /* freed extent records */
3956 xfs_mount_t *mp; /* mount structure */
3957 xfs_trans_t *tp; /* transaction pointer */
3958 unsigned long s; /* spinlock spl value */
3959 int blks; /* space reservation */
3960 int version = 1; /* superblock attr version */
3961 int committed; /* xaction was committed */
3962 int logflags; /* logging flags */
3963 int error; /* error return value */
3965 ASSERT(XFS_IFORK_Q(ip) == 0);
3966 ASSERT(ip->i_df.if_ext_max ==
3967 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
3970 ASSERT(!XFS_NOT_DQATTACHED(mp, ip));
3971 tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK);
3972 blks = XFS_ADDAFORK_SPACE_RES(mp);
3974 tp->t_flags |= XFS_TRANS_RESERVE;
3975 if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0,
3976 XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT)))
3978 xfs_ilock(ip, XFS_ILOCK_EXCL);
3979 error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, blks, 0, rsvd ?
3980 XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
3981 XFS_QMOPT_RES_REGBLKS);
3983 xfs_iunlock(ip, XFS_ILOCK_EXCL);
3984 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES);
3987 if (XFS_IFORK_Q(ip))
3989 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) {
3991 * For inodes coming from pre-6.2 filesystems.
3993 ASSERT(ip->i_d.di_aformat == 0);
3994 ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS;
3996 ASSERT(ip->i_d.di_anextents == 0);
3997 VN_HOLD(XFS_ITOV(ip));
3998 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
3999 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
4000 switch (ip->i_d.di_format) {
4001 case XFS_DINODE_FMT_DEV:
4002 ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3;
4004 case XFS_DINODE_FMT_UUID:
4005 ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3;
4007 case XFS_DINODE_FMT_LOCAL:
4008 case XFS_DINODE_FMT_EXTENTS:
4009 case XFS_DINODE_FMT_BTREE:
4010 ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size);
4011 if (!ip->i_d.di_forkoff)
4012 ip->i_d.di_forkoff = mp->m_attroffset >> 3;
4013 else if (mp->m_flags & XFS_MOUNT_ATTR2)
4018 error = XFS_ERROR(EINVAL);
4021 ip->i_df.if_ext_max =
4022 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
4023 ASSERT(ip->i_afp == NULL);
4024 ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP);
4025 ip->i_afp->if_ext_max =
4026 XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
4027 ip->i_afp->if_flags = XFS_IFEXTENTS;
4029 XFS_BMAP_INIT(&flist, &firstblock);
4030 switch (ip->i_d.di_format) {
4031 case XFS_DINODE_FMT_LOCAL:
4032 error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist,
4035 case XFS_DINODE_FMT_EXTENTS:
4036 error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock,
4039 case XFS_DINODE_FMT_BTREE:
4040 error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist,
4048 xfs_trans_log_inode(tp, ip, logflags);
4051 if (!XFS_SB_VERSION_HASATTR(&mp->m_sb) ||
4052 (!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2)) {
4053 __int64_t sbfields = 0;
4055 s = XFS_SB_LOCK(mp);
4056 if (!XFS_SB_VERSION_HASATTR(&mp->m_sb)) {
4057 XFS_SB_VERSION_ADDATTR(&mp->m_sb);
4058 sbfields |= XFS_SB_VERSIONNUM;
4060 if (!XFS_SB_VERSION_HASATTR2(&mp->m_sb) && version == 2) {
4061 XFS_SB_VERSION_ADDATTR2(&mp->m_sb);
4062 sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2);
4065 XFS_SB_UNLOCK(mp, s);
4066 xfs_mod_sb(tp, sbfields);
4068 XFS_SB_UNLOCK(mp, s);
4070 if ((error = xfs_bmap_finish(&tp, &flist, &committed)))
4072 error = xfs_trans_commit(tp, XFS_TRANS_PERM_LOG_RES);
4073 ASSERT(ip->i_df.if_ext_max ==
4074 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
4077 xfs_bmap_cancel(&flist);
4079 ASSERT(ismrlocked(&ip->i_lock,MR_UPDATE));
4080 xfs_iunlock(ip, XFS_ILOCK_EXCL);
4082 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
4083 ASSERT(ip->i_df.if_ext_max ==
4084 XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t));
4089 * Add the extent to the list of extents to be free at transaction end.
4090 * The list is maintained sorted (by block number).
4095 xfs_fsblock_t bno, /* fs block number of extent */
4096 xfs_filblks_t len, /* length of extent */
4097 xfs_bmap_free_t *flist, /* list of extents */
4098 xfs_mount_t *mp) /* mount point structure */
4100 xfs_bmap_free_item_t *cur; /* current (next) element */
4101 xfs_bmap_free_item_t *new; /* new element */
4102 xfs_bmap_free_item_t *prev; /* previous element */
4104 xfs_agnumber_t agno;
4105 xfs_agblock_t agbno;
4107 ASSERT(bno != NULLFSBLOCK);
4109 ASSERT(len <= MAXEXTLEN);
4110 ASSERT(!ISNULLSTARTBLOCK(bno));
4111 agno = XFS_FSB_TO_AGNO(mp, bno);
4112 agbno = XFS_FSB_TO_AGBNO(mp, bno);
4113 ASSERT(agno < mp->m_sb.sb_agcount);
4114 ASSERT(agbno < mp->m_sb.sb_agblocks);
4115 ASSERT(len < mp->m_sb.sb_agblocks);
4116 ASSERT(agbno + len <= mp->m_sb.sb_agblocks);
4118 ASSERT(xfs_bmap_free_item_zone != NULL);
4119 new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP);
4120 new->xbfi_startblock = bno;
4121 new->xbfi_blockcount = (xfs_extlen_t)len;
4122 for (prev = NULL, cur = flist->xbf_first;
4124 prev = cur, cur = cur->xbfi_next) {
4125 if (cur->xbfi_startblock >= bno)
4129 prev->xbfi_next = new;
4131 flist->xbf_first = new;
4132 new->xbfi_next = cur;
4137 * Compute and fill in the value of the maximum depth of a bmap btree
4138 * in this filesystem. Done once, during mount.
4141 xfs_bmap_compute_maxlevels(
4142 xfs_mount_t *mp, /* file system mount structure */
4143 int whichfork) /* data or attr fork */
4145 int level; /* btree level */
4146 uint maxblocks; /* max blocks at this level */
4147 uint maxleafents; /* max leaf entries possible */
4148 int maxrootrecs; /* max records in root block */
4149 int minleafrecs; /* min records in leaf block */
4150 int minnoderecs; /* min records in node block */
4151 int sz; /* root block size */
4154 * The maximum number of extents in a file, hence the maximum
4155 * number of leaf entries, is controlled by the type of di_nextents
4156 * (a signed 32-bit number, xfs_extnum_t), or by di_anextents
4157 * (a signed 16-bit number, xfs_aextnum_t).
4159 if (whichfork == XFS_DATA_FORK) {
4160 maxleafents = MAXEXTNUM;
4161 sz = (mp->m_flags & XFS_MOUNT_ATTR2) ?
4162 XFS_BMDR_SPACE_CALC(MINDBTPTRS) : mp->m_attroffset;
4164 maxleafents = MAXAEXTNUM;
4165 sz = (mp->m_flags & XFS_MOUNT_ATTR2) ?
4166 XFS_BMDR_SPACE_CALC(MINABTPTRS) :
4167 mp->m_sb.sb_inodesize - mp->m_attroffset;
4169 maxrootrecs = (int)XFS_BTREE_BLOCK_MAXRECS(sz, xfs_bmdr, 0);
4170 minleafrecs = mp->m_bmap_dmnr[0];
4171 minnoderecs = mp->m_bmap_dmnr[1];
4172 maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs;
4173 for (level = 1; maxblocks > 1; level++) {
4174 if (maxblocks <= maxrootrecs)
4177 maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs;
4179 mp->m_bm_maxlevels[whichfork] = level;
4183 * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
4184 * caller. Frees all the extents that need freeing, which must be done
4185 * last due to locking considerations. We never free any extents in
4186 * the first transaction. This is to allow the caller to make the first
4187 * transaction a synchronous one so that the pointers to the data being
4188 * broken in this transaction will be permanent before the data is actually
4189 * freed. This is necessary to prevent blocks from being reallocated
4190 * and written to before the free and reallocation are actually permanent.
4191 * We do not just make the first transaction synchronous here, because
4192 * there are more efficient ways to gain the same protection in some cases
4193 * (see the file truncation code).
4195 * Return 1 if the given transaction was committed and a new one
4196 * started, and 0 otherwise in the committed parameter.
4201 xfs_trans_t **tp, /* transaction pointer addr */
4202 xfs_bmap_free_t *flist, /* i/o: list extents to free */
4203 int *committed) /* xact committed or not */
4205 xfs_efd_log_item_t *efd; /* extent free data */
4206 xfs_efi_log_item_t *efi; /* extent free intention */
4207 int error; /* error return value */
4208 xfs_bmap_free_item_t *free; /* free extent item */
4209 unsigned int logres; /* new log reservation */
4210 unsigned int logcount; /* new log count */
4211 xfs_mount_t *mp; /* filesystem mount structure */
4212 xfs_bmap_free_item_t *next; /* next item on free list */
4213 xfs_trans_t *ntp; /* new transaction pointer */
4215 ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
4216 if (flist->xbf_count == 0) {
4221 efi = xfs_trans_get_efi(ntp, flist->xbf_count);
4222 for (free = flist->xbf_first; free; free = free->xbfi_next)
4223 xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
4224 free->xbfi_blockcount);
4225 logres = ntp->t_log_res;
4226 logcount = ntp->t_log_count;
4227 ntp = xfs_trans_dup(*tp);
4228 error = xfs_trans_commit(*tp, 0);
4232 * We have a new transaction, so we should return committed=1,
4233 * even though we're returning an error.
4238 if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES,
4241 efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
4242 for (free = flist->xbf_first; free != NULL; free = next) {
4243 next = free->xbfi_next;
4244 if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
4245 free->xbfi_blockcount))) {
4247 * The bmap free list will be cleaned up at a
4248 * higher level. The EFI will be canceled when
4249 * this transaction is aborted.
4250 * Need to force shutdown here to make sure it
4251 * happens, since this transaction may not be
4255 if (!XFS_FORCED_SHUTDOWN(mp))
4256 xfs_force_shutdown(mp,
4257 (error == EFSCORRUPTED) ?
4258 SHUTDOWN_CORRUPT_INCORE :
4259 SHUTDOWN_META_IO_ERROR);
4262 xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
4263 free->xbfi_blockcount);
4264 xfs_bmap_del_free(flist, NULL, free);
4270 * Free up any items left in the list.
4274 xfs_bmap_free_t *flist) /* list of bmap_free_items */
4276 xfs_bmap_free_item_t *free; /* free list item */
4277 xfs_bmap_free_item_t *next;
4279 if (flist->xbf_count == 0)
4281 ASSERT(flist->xbf_first != NULL);
4282 for (free = flist->xbf_first; free; free = next) {
4283 next = free->xbfi_next;
4284 xfs_bmap_del_free(flist, NULL, free);
4286 ASSERT(flist->xbf_count == 0);
4290 * Returns the file-relative block number of the first unused block(s)
4291 * in the file with at least "len" logically contiguous blocks free.
4292 * This is the lowest-address hole if the file has holes, else the first block
4293 * past the end of file.
4294 * Return 0 if the file is currently local (in-inode).
4297 xfs_bmap_first_unused(
4298 xfs_trans_t *tp, /* transaction pointer */
4299 xfs_inode_t *ip, /* incore inode */
4300 xfs_extlen_t len, /* size of hole to find */
4301 xfs_fileoff_t *first_unused, /* unused block */
4302 int whichfork) /* data or attr fork */
4304 int error; /* error return value */
4305 int idx; /* extent record index */
4306 xfs_ifork_t *ifp; /* inode fork pointer */
4307 xfs_fileoff_t lastaddr; /* last block number seen */
4308 xfs_fileoff_t lowest; /* lowest useful block */
4309 xfs_fileoff_t max; /* starting useful block */
4310 xfs_fileoff_t off; /* offset for this block */
4311 xfs_extnum_t nextents; /* number of extent entries */
4313 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE ||
4314 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ||
4315 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL);
4316 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4320 ifp = XFS_IFORK_PTR(ip, whichfork);
4321 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4322 (error = xfs_iread_extents(tp, ip, whichfork)))
4324 lowest = *first_unused;
4325 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4326 for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
4327 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
4328 off = xfs_bmbt_get_startoff(ep);
4330 * See if the hole before this extent will work.
4332 if (off >= lowest + len && off - max >= len) {
4333 *first_unused = max;
4336 lastaddr = off + xfs_bmbt_get_blockcount(ep);
4337 max = XFS_FILEOFF_MAX(lastaddr, lowest);
4339 *first_unused = max;
4344 * Returns the file-relative block number of the last block + 1 before
4345 * last_block (input value) in the file.
4346 * This is not based on i_size, it is based on the extent records.
4347 * Returns 0 for local files, as they do not have extent records.
4350 xfs_bmap_last_before(
4351 xfs_trans_t *tp, /* transaction pointer */
4352 xfs_inode_t *ip, /* incore inode */
4353 xfs_fileoff_t *last_block, /* last block */
4354 int whichfork) /* data or attr fork */
4356 xfs_fileoff_t bno; /* input file offset */
4357 int eof; /* hit end of file */
4358 xfs_bmbt_rec_host_t *ep; /* pointer to last extent */
4359 int error; /* error return value */
4360 xfs_bmbt_irec_t got; /* current extent value */
4361 xfs_ifork_t *ifp; /* inode fork pointer */
4362 xfs_extnum_t lastx; /* last extent used */
4363 xfs_bmbt_irec_t prev; /* previous extent value */
4365 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4366 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4367 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
4368 return XFS_ERROR(EIO);
4369 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4373 ifp = XFS_IFORK_PTR(ip, whichfork);
4374 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4375 (error = xfs_iread_extents(tp, ip, whichfork)))
4377 bno = *last_block - 1;
4378 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4380 if (eof || xfs_bmbt_get_startoff(ep) > bno) {
4381 if (prev.br_startoff == NULLFILEOFF)
4384 *last_block = prev.br_startoff + prev.br_blockcount;
4387 * Otherwise *last_block is already the right answer.
4393 * Returns the file-relative block number of the first block past eof in
4394 * the file. This is not based on i_size, it is based on the extent records.
4395 * Returns 0 for local files, as they do not have extent records.
4398 xfs_bmap_last_offset(
4399 xfs_trans_t *tp, /* transaction pointer */
4400 xfs_inode_t *ip, /* incore inode */
4401 xfs_fileoff_t *last_block, /* last block */
4402 int whichfork) /* data or attr fork */
4404 xfs_bmbt_rec_host_t *ep; /* pointer to last extent */
4405 int error; /* error return value */
4406 xfs_ifork_t *ifp; /* inode fork pointer */
4407 xfs_extnum_t nextents; /* number of extent entries */
4409 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4410 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4411 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL)
4412 return XFS_ERROR(EIO);
4413 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4417 ifp = XFS_IFORK_PTR(ip, whichfork);
4418 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4419 (error = xfs_iread_extents(tp, ip, whichfork)))
4421 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4426 ep = xfs_iext_get_ext(ifp, nextents - 1);
4427 *last_block = xfs_bmbt_get_startoff(ep) + xfs_bmbt_get_blockcount(ep);
4432 * Returns whether the selected fork of the inode has exactly one
4433 * block or not. For the data fork we check this matches di_size,
4434 * implying the file's range is 0..bsize-1.
4436 int /* 1=>1 block, 0=>otherwise */
4438 xfs_inode_t *ip, /* incore inode */
4439 int whichfork) /* data or attr fork */
4441 xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */
4442 xfs_ifork_t *ifp; /* inode fork pointer */
4443 int rval; /* return value */
4444 xfs_bmbt_irec_t s; /* internal version of extent */
4447 if (whichfork == XFS_DATA_FORK) {
4448 return ((ip->i_d.di_mode & S_IFMT) == S_IFREG) ?
4449 (ip->i_size == ip->i_mount->m_sb.sb_blocksize) :
4450 (ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize);
4453 if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1)
4455 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
4457 ifp = XFS_IFORK_PTR(ip, whichfork);
4458 ASSERT(ifp->if_flags & XFS_IFEXTENTS);
4459 ep = xfs_iext_get_ext(ifp, 0);
4460 xfs_bmbt_get_all(ep, &s);
4461 rval = s.br_startoff == 0 && s.br_blockcount == 1;
4462 if (rval && whichfork == XFS_DATA_FORK)
4463 ASSERT(ip->i_size == ip->i_mount->m_sb.sb_blocksize);
4468 * Read in the extents to if_extents.
4469 * All inode fields are set up by caller, we just traverse the btree
4470 * and copy the records in. If the file system cannot contain unwritten
4471 * extents, the records are checked for no "state" flags.
4474 xfs_bmap_read_extents(
4475 xfs_trans_t *tp, /* transaction pointer */
4476 xfs_inode_t *ip, /* incore inode */
4477 int whichfork) /* data or attr fork */
4479 xfs_bmbt_block_t *block; /* current btree block */
4480 xfs_fsblock_t bno; /* block # of "block" */
4481 xfs_buf_t *bp; /* buffer for "block" */
4482 int error; /* error return value */
4483 xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */
4484 xfs_extnum_t i, j; /* index into the extents list */
4485 xfs_ifork_t *ifp; /* fork structure */
4486 int level; /* btree level, for checking */
4487 xfs_mount_t *mp; /* file system mount structure */
4488 __be64 *pp; /* pointer to block address */
4490 xfs_extnum_t room; /* number of entries there's room for */
4494 ifp = XFS_IFORK_PTR(ip, whichfork);
4495 exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE :
4496 XFS_EXTFMT_INODE(ip);
4497 block = ifp->if_broot;
4499 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
4501 level = be16_to_cpu(block->bb_level);
4503 pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes);
4504 bno = be64_to_cpu(*pp);
4505 ASSERT(bno != NULLDFSBNO);
4506 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
4507 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
4509 * Go down the tree until leaf level is reached, following the first
4510 * pointer (leftmost) at each level.
4512 while (level-- > 0) {
4513 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4514 XFS_BMAP_BTREE_REF)))
4516 block = XFS_BUF_TO_BMBT_BLOCK(bp);
4517 XFS_WANT_CORRUPTED_GOTO(
4518 XFS_BMAP_SANITY_CHECK(mp, block, level),
4522 pp = XFS_BTREE_PTR_ADDR(xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]);
4523 bno = be64_to_cpu(*pp);
4524 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
4525 xfs_trans_brelse(tp, bp);
4528 * Here with bp and block set to the leftmost leaf node in the tree.
4530 room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4533 * Loop over all leaf nodes. Copy information to the extent records.
4536 xfs_bmbt_rec_t *frp;
4537 xfs_fsblock_t nextbno;
4538 xfs_extnum_t num_recs;
4542 num_recs = be16_to_cpu(block->bb_numrecs);
4543 if (unlikely(i + num_recs > room)) {
4544 ASSERT(i + num_recs <= room);
4545 xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount,
4546 "corrupt dinode %Lu, (btree extents).",
4547 (unsigned long long) ip->i_ino);
4548 XFS_ERROR_REPORT("xfs_bmap_read_extents(1)",
4553 XFS_WANT_CORRUPTED_GOTO(
4554 XFS_BMAP_SANITY_CHECK(mp, block, 0),
4557 * Read-ahead the next leaf block, if any.
4559 nextbno = be64_to_cpu(block->bb_rightsib);
4560 if (nextbno != NULLFSBLOCK)
4561 xfs_btree_reada_bufl(mp, nextbno, 1);
4563 * Copy records into the extent records.
4565 frp = XFS_BTREE_REC_ADDR(xfs_bmbt, block, 1);
4567 for (j = 0; j < num_recs; j++, i++, frp++) {
4568 xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
4569 trp->l0 = INT_GET(frp->l0, ARCH_CONVERT);
4570 trp->l1 = INT_GET(frp->l1, ARCH_CONVERT);
4572 if (exntf == XFS_EXTFMT_NOSTATE) {
4574 * Check all attribute bmap btree records and
4575 * any "older" data bmap btree records for a
4576 * set bit in the "extent flag" position.
4578 if (unlikely(xfs_check_nostate_extents(ifp,
4579 start, num_recs))) {
4580 XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
4586 xfs_trans_brelse(tp, bp);
4589 * If we've reached the end, stop.
4591 if (bno == NULLFSBLOCK)
4593 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
4594 XFS_BMAP_BTREE_REF)))
4596 block = XFS_BUF_TO_BMBT_BLOCK(bp);
4598 ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4599 ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
4600 XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
4603 xfs_trans_brelse(tp, bp);
4604 return XFS_ERROR(EFSCORRUPTED);
4607 #ifdef XFS_BMAP_TRACE
4609 * Add bmap trace insert entries for all the contents of the extent records.
4612 xfs_bmap_trace_exlist(
4613 const char *fname, /* function name */
4614 xfs_inode_t *ip, /* incore inode pointer */
4615 xfs_extnum_t cnt, /* count of entries in the list */
4616 int whichfork) /* data or attr fork */
4618 xfs_bmbt_rec_host_t *ep; /* current extent record */
4619 xfs_extnum_t idx; /* extent record index */
4620 xfs_ifork_t *ifp; /* inode fork pointer */
4621 xfs_bmbt_irec_t s; /* file extent record */
4623 ifp = XFS_IFORK_PTR(ip, whichfork);
4624 ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
4625 for (idx = 0; idx < cnt; idx++) {
4626 ep = xfs_iext_get_ext(ifp, idx);
4627 xfs_bmbt_get_all(ep, &s);
4628 XFS_BMAP_TRACE_INSERT("exlist", ip, idx, 1, &s, NULL,
4636 * Validate that the bmbt_irecs being returned from bmapi are valid
4637 * given the callers original parameters. Specifically check the
4638 * ranges of the returned irecs to ensure that they only extent beyond
4639 * the given parameters if the XFS_BMAPI_ENTIRE flag was set.
4642 xfs_bmap_validate_ret(
4646 xfs_bmbt_irec_t *mval,
4650 int i; /* index to map values */
4652 ASSERT(ret_nmap <= nmap);
4654 for (i = 0; i < ret_nmap; i++) {
4655 ASSERT(mval[i].br_blockcount > 0);
4656 if (!(flags & XFS_BMAPI_ENTIRE)) {
4657 ASSERT(mval[i].br_startoff >= bno);
4658 ASSERT(mval[i].br_blockcount <= len);
4659 ASSERT(mval[i].br_startoff + mval[i].br_blockcount <=
4662 ASSERT(mval[i].br_startoff < bno + len);
4663 ASSERT(mval[i].br_startoff + mval[i].br_blockcount >
4667 mval[i - 1].br_startoff + mval[i - 1].br_blockcount ==
4668 mval[i].br_startoff);
4669 if ((flags & XFS_BMAPI_WRITE) && !(flags & XFS_BMAPI_DELAY))
4670 ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK &&
4671 mval[i].br_startblock != HOLESTARTBLOCK);
4672 ASSERT(mval[i].br_state == XFS_EXT_NORM ||
4673 mval[i].br_state == XFS_EXT_UNWRITTEN);
4680 * Map file blocks to filesystem blocks.
4681 * File range is given by the bno/len pair.
4682 * Adds blocks to file if a write ("flags & XFS_BMAPI_WRITE" set)
4683 * into a hole or past eof.
4684 * Only allocates blocks from a single allocation group,
4685 * to avoid locking problems.
4686 * The returned value in "firstblock" from the first call in a transaction
4687 * must be remembered and presented to subsequent calls in "firstblock".
4688 * An upper bound for the number of blocks to be allocated is supplied to
4689 * the first call in "total"; if no allocation group has that many free
4690 * blocks then the call will fail (return NULLFSBLOCK in "firstblock").
4694 xfs_trans_t *tp, /* transaction pointer */
4695 xfs_inode_t *ip, /* incore inode */
4696 xfs_fileoff_t bno, /* starting file offs. mapped */
4697 xfs_filblks_t len, /* length to map in file */
4698 int flags, /* XFS_BMAPI_... */
4699 xfs_fsblock_t *firstblock, /* first allocated block
4700 controls a.g. for allocs */
4701 xfs_extlen_t total, /* total blocks needed */
4702 xfs_bmbt_irec_t *mval, /* output: map values */
4703 int *nmap, /* i/o: mval size/count */
4704 xfs_bmap_free_t *flist, /* i/o: list extents to free */
4705 xfs_extdelta_t *delta) /* o: change made to incore extents */
4707 xfs_fsblock_t abno; /* allocated block number */
4708 xfs_extlen_t alen; /* allocated extent length */
4709 xfs_fileoff_t aoff; /* allocated file offset */
4710 xfs_bmalloca_t bma; /* args for xfs_bmap_alloc */
4711 xfs_btree_cur_t *cur; /* bmap btree cursor */
4712 xfs_fileoff_t end; /* end of mapped file region */
4713 int eof; /* we've hit the end of extents */
4714 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
4715 int error; /* error return */
4716 xfs_bmbt_irec_t got; /* current file extent record */
4717 xfs_ifork_t *ifp; /* inode fork pointer */
4718 xfs_extlen_t indlen; /* indirect blocks length */
4719 xfs_extnum_t lastx; /* last useful extent number */
4720 int logflags; /* flags for transaction logging */
4721 xfs_extlen_t minleft; /* min blocks left after allocation */
4722 xfs_extlen_t minlen; /* min allocation size */
4723 xfs_mount_t *mp; /* xfs mount structure */
4724 int n; /* current extent index */
4725 int nallocs; /* number of extents alloc\'d */
4726 xfs_extnum_t nextents; /* number of extents in file */
4727 xfs_fileoff_t obno; /* old block number (offset) */
4728 xfs_bmbt_irec_t prev; /* previous file extent record */
4729 int tmp_logflags; /* temp flags holder */
4730 int whichfork; /* data or attr fork */
4731 char inhole; /* current location is hole in file */
4732 char wasdelay; /* old extent was delayed */
4733 char wr; /* this is a write request */
4734 char rt; /* this is a realtime file */
4736 xfs_fileoff_t orig_bno; /* original block number value */
4737 int orig_flags; /* original flags arg value */
4738 xfs_filblks_t orig_len; /* original value of len arg */
4739 xfs_bmbt_irec_t *orig_mval; /* original value of mval */
4740 int orig_nmap; /* original value of *nmap */
4749 ASSERT(*nmap <= XFS_BMAP_MAX_NMAP || !(flags & XFS_BMAPI_WRITE));
4750 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
4751 XFS_ATTR_FORK : XFS_DATA_FORK;
4753 if (unlikely(XFS_TEST_ERROR(
4754 (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
4755 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
4756 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL),
4757 mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) {
4758 XFS_ERROR_REPORT("xfs_bmapi", XFS_ERRLEVEL_LOW, mp);
4759 return XFS_ERROR(EFSCORRUPTED);
4761 if (XFS_FORCED_SHUTDOWN(mp))
4762 return XFS_ERROR(EIO);
4763 rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
4764 ifp = XFS_IFORK_PTR(ip, whichfork);
4765 ASSERT(ifp->if_ext_max ==
4766 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
4767 if ((wr = (flags & XFS_BMAPI_WRITE)) != 0)
4768 XFS_STATS_INC(xs_blk_mapw);
4770 XFS_STATS_INC(xs_blk_mapr);
4772 * IGSTATE flag is used to combine extents which
4773 * differ only due to the state of the extents.
4774 * This technique is used from xfs_getbmap()
4775 * when the caller does not wish to see the
4776 * separation (which is the default).
4778 * This technique is also used when writing a
4779 * buffer which has been partially written,
4780 * (usually by being flushed during a chunkread),
4781 * to ensure one write takes place. This also
4782 * prevents a change in the xfs inode extents at
4783 * this time, intentionally. This change occurs
4784 * on completion of the write operation, in
4785 * xfs_strat_comp(), where the xfs_bmapi() call
4786 * is transactioned, and the extents combined.
4788 if ((flags & XFS_BMAPI_IGSTATE) && wr) /* if writing unwritten space */
4789 wr = 0; /* no allocations are allowed */
4790 ASSERT(wr || !(flags & XFS_BMAPI_DELAY));
4794 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
4796 if ((error = xfs_bmap_local_to_extents(tp, ip,
4797 firstblock, total, &logflags, whichfork)))
4800 if (wr && *firstblock == NULLFSBLOCK) {
4801 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
4802 minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
4807 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
4808 (error = xfs_iread_extents(tp, ip, whichfork)))
4810 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
4812 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
4818 delta->xed_startoff = NULLFILEOFF;
4819 delta->xed_blockcount = 0;
4821 while (bno < end && n < *nmap) {
4823 * Reading past eof, act as though there's a hole
4827 got.br_startoff = end;
4828 inhole = eof || got.br_startoff > bno;
4829 wasdelay = wr && !inhole && !(flags & XFS_BMAPI_DELAY) &&
4830 ISNULLSTARTBLOCK(got.br_startblock);
4832 * First, deal with the hole before the allocated space
4833 * that we found, if any.
4835 if (wr && (inhole || wasdelay)) {
4837 * For the wasdelay case, we could also just
4838 * allocate the stuff asked for in this bmap call
4839 * but that wouldn't be as good.
4841 if (wasdelay && !(flags & XFS_BMAPI_EXACT)) {
4842 alen = (xfs_extlen_t)got.br_blockcount;
4843 aoff = got.br_startoff;
4844 if (lastx != NULLEXTNUM && lastx) {
4845 ep = xfs_iext_get_ext(ifp, lastx - 1);
4846 xfs_bmbt_get_all(ep, &prev);
4848 } else if (wasdelay) {
4849 alen = (xfs_extlen_t)
4850 XFS_FILBLKS_MIN(len,
4852 got.br_blockcount) - bno);
4855 alen = (xfs_extlen_t)
4856 XFS_FILBLKS_MIN(len, MAXEXTLEN);
4858 alen = (xfs_extlen_t)
4859 XFS_FILBLKS_MIN(alen,
4860 got.br_startoff - bno);
4863 minlen = (flags & XFS_BMAPI_CONTIG) ? alen : 1;
4864 if (flags & XFS_BMAPI_DELAY) {
4867 /* Figure out the extent size, adjust alen */
4868 extsz = xfs_get_extsz_hint(ip);
4870 error = xfs_bmap_extsize_align(mp,
4873 flags&XFS_BMAPI_DELAY,
4874 flags&XFS_BMAPI_CONVERT,
4880 extsz = alen / mp->m_sb.sb_rextsize;
4883 * Make a transaction-less quota reservation for
4884 * delayed allocation blocks. This number gets
4885 * adjusted later. We return if we haven't
4886 * allocated blocks already inside this loop.
4888 if ((error = XFS_TRANS_RESERVE_QUOTA_NBLKS(
4889 mp, NULL, ip, (long)alen, 0,
4890 rt ? XFS_QMOPT_RES_RTBLKS :
4891 XFS_QMOPT_RES_REGBLKS))) {
4894 ASSERT(cur == NULL);
4901 * Split changing sb for alen and indlen since
4902 * they could be coming from different places.
4904 indlen = (xfs_extlen_t)
4905 xfs_bmap_worst_indlen(ip, alen);
4909 error = xfs_mod_incore_sb(mp,
4911 -((int64_t)extsz), (flags &
4912 XFS_BMAPI_RSVBLOCKS));
4914 error = xfs_mod_incore_sb(mp,
4916 -((int64_t)alen), (flags &
4917 XFS_BMAPI_RSVBLOCKS));
4920 error = xfs_mod_incore_sb(mp,
4922 -((int64_t)indlen), (flags &
4923 XFS_BMAPI_RSVBLOCKS));
4925 xfs_mod_incore_sb(mp,
4927 (int64_t)extsz, (flags &
4928 XFS_BMAPI_RSVBLOCKS));
4930 xfs_mod_incore_sb(mp,
4932 (int64_t)alen, (flags &
4933 XFS_BMAPI_RSVBLOCKS));
4937 if (XFS_IS_QUOTA_ON(mp))
4938 /* unreserve the blocks now */
4940 XFS_TRANS_UNRESERVE_QUOTA_NBLKS(
4943 XFS_QMOPT_RES_RTBLKS :
4944 XFS_QMOPT_RES_REGBLKS);
4948 ip->i_delayed_blks += alen;
4949 abno = NULLSTARTBLOCK(indlen);
4952 * If first time, allocate and fill in
4953 * once-only bma fields.
4955 if (bma.ip == NULL) {
4963 /* Indicate if this is the first user data
4964 * in the file, or just any user data.
4966 if (!(flags & XFS_BMAPI_METADATA)) {
4967 bma.userdata = (aoff == 0) ?
4968 XFS_ALLOC_INITIAL_USER_DATA :
4972 * Fill in changeable bma fields.
4975 bma.firstblock = *firstblock;
4978 bma.conv = !!(flags & XFS_BMAPI_CONVERT);
4979 bma.wasdel = wasdelay;
4980 bma.minlen = minlen;
4981 bma.low = flist->xbf_low;
4982 bma.minleft = minleft;
4984 * Only want to do the alignment at the
4985 * eof if it is userdata and allocation length
4986 * is larger than a stripe unit.
4988 if (mp->m_dalign && alen >= mp->m_dalign &&
4989 (!(flags & XFS_BMAPI_METADATA)) &&
4990 (whichfork == XFS_DATA_FORK)) {
4991 if ((error = xfs_bmap_isaeof(ip, aoff,
4992 whichfork, &bma.aeof)))
4999 if ((error = xfs_bmap_alloc(&bma)))
5002 * Copy out result fields.
5005 if ((flist->xbf_low = bma.low))
5009 ASSERT(*firstblock == NULLFSBLOCK ||
5010 XFS_FSB_TO_AGNO(mp, *firstblock) ==
5011 XFS_FSB_TO_AGNO(mp, bma.firstblock) ||
5013 XFS_FSB_TO_AGNO(mp, *firstblock) <
5014 XFS_FSB_TO_AGNO(mp, bma.firstblock)));
5015 *firstblock = bma.firstblock;
5017 cur->bc_private.b.firstblock =
5019 if (abno == NULLFSBLOCK)
5021 if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
5022 cur = xfs_btree_init_cursor(mp,
5023 tp, NULL, 0, XFS_BTNUM_BMAP,
5025 cur->bc_private.b.firstblock =
5027 cur->bc_private.b.flist = flist;
5030 * Bump the number of extents we've allocated
5036 cur->bc_private.b.flags =
5037 wasdelay ? XFS_BTCUR_BPRV_WASDEL : 0;
5038 got.br_startoff = aoff;
5039 got.br_startblock = abno;
5040 got.br_blockcount = alen;
5041 got.br_state = XFS_EXT_NORM; /* assume normal */
5043 * Determine state of extent, and the filesystem.
5044 * A wasdelay extent has been initialized, so
5045 * shouldn't be flagged as unwritten.
5047 if (wr && XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
5048 if (!wasdelay && (flags & XFS_BMAPI_PREALLOC))
5049 got.br_state = XFS_EXT_UNWRITTEN;
5051 error = xfs_bmap_add_extent(ip, lastx, &cur, &got,
5052 firstblock, flist, &tmp_logflags, delta,
5053 whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
5054 logflags |= tmp_logflags;
5057 lastx = ifp->if_lastex;
5058 ep = xfs_iext_get_ext(ifp, lastx);
5059 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5060 xfs_bmbt_get_all(ep, &got);
5061 ASSERT(got.br_startoff <= aoff);
5062 ASSERT(got.br_startoff + got.br_blockcount >=
5065 if (flags & XFS_BMAPI_DELAY) {
5066 ASSERT(ISNULLSTARTBLOCK(got.br_startblock));
5067 ASSERT(STARTBLOCKVAL(got.br_startblock) > 0);
5069 ASSERT(got.br_state == XFS_EXT_NORM ||
5070 got.br_state == XFS_EXT_UNWRITTEN);
5073 * Fall down into the found allocated space case.
5075 } else if (inhole) {
5077 * Reading in a hole.
5079 mval->br_startoff = bno;
5080 mval->br_startblock = HOLESTARTBLOCK;
5081 mval->br_blockcount =
5082 XFS_FILBLKS_MIN(len, got.br_startoff - bno);
5083 mval->br_state = XFS_EXT_NORM;
5084 bno += mval->br_blockcount;
5085 len -= mval->br_blockcount;
5091 * Then deal with the allocated space we found.
5094 if (!(flags & XFS_BMAPI_ENTIRE) &&
5095 (got.br_startoff + got.br_blockcount > obno)) {
5098 ASSERT((bno >= obno) || (n == 0));
5100 mval->br_startoff = bno;
5101 if (ISNULLSTARTBLOCK(got.br_startblock)) {
5102 ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
5103 mval->br_startblock = DELAYSTARTBLOCK;
5105 mval->br_startblock =
5107 (bno - got.br_startoff);
5109 * Return the minimum of what we got and what we
5110 * asked for for the length. We can use the len
5111 * variable here because it is modified below
5112 * and we could have been there before coming
5113 * here if the first part of the allocation
5114 * didn't overlap what was asked for.
5116 mval->br_blockcount =
5117 XFS_FILBLKS_MIN(end - bno, got.br_blockcount -
5118 (bno - got.br_startoff));
5119 mval->br_state = got.br_state;
5120 ASSERT(mval->br_blockcount <= len);
5123 if (ISNULLSTARTBLOCK(mval->br_startblock)) {
5124 ASSERT(!wr || (flags & XFS_BMAPI_DELAY));
5125 mval->br_startblock = DELAYSTARTBLOCK;
5130 * Check if writing previously allocated but
5131 * unwritten extents.
5133 if (wr && mval->br_state == XFS_EXT_UNWRITTEN &&
5134 ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_DELAY)) == 0)) {
5136 * Modify (by adding) the state flag, if writing.
5138 ASSERT(mval->br_blockcount <= len);
5139 if ((ifp->if_flags & XFS_IFBROOT) && !cur) {
5140 cur = xfs_btree_init_cursor(mp,
5141 tp, NULL, 0, XFS_BTNUM_BMAP,
5143 cur->bc_private.b.firstblock =
5145 cur->bc_private.b.flist = flist;
5147 mval->br_state = XFS_EXT_NORM;
5148 error = xfs_bmap_add_extent(ip, lastx, &cur, mval,
5149 firstblock, flist, &tmp_logflags, delta,
5150 whichfork, (flags & XFS_BMAPI_RSVBLOCKS));
5151 logflags |= tmp_logflags;
5154 lastx = ifp->if_lastex;
5155 ep = xfs_iext_get_ext(ifp, lastx);
5156 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5157 xfs_bmbt_get_all(ep, &got);
5159 * We may have combined previously unwritten
5160 * space with written space, so generate
5163 if (mval->br_blockcount < len)
5167 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
5168 ((mval->br_startoff + mval->br_blockcount) <= end));
5169 ASSERT((flags & XFS_BMAPI_ENTIRE) ||
5170 (mval->br_blockcount <= len) ||
5171 (mval->br_startoff < obno));
5172 bno = mval->br_startoff + mval->br_blockcount;
5174 if (n > 0 && mval->br_startoff == mval[-1].br_startoff) {
5175 ASSERT(mval->br_startblock == mval[-1].br_startblock);
5176 ASSERT(mval->br_blockcount > mval[-1].br_blockcount);
5177 ASSERT(mval->br_state == mval[-1].br_state);
5178 mval[-1].br_blockcount = mval->br_blockcount;
5179 mval[-1].br_state = mval->br_state;
5180 } else if (n > 0 && mval->br_startblock != DELAYSTARTBLOCK &&
5181 mval[-1].br_startblock != DELAYSTARTBLOCK &&
5182 mval[-1].br_startblock != HOLESTARTBLOCK &&
5183 mval->br_startblock ==
5184 mval[-1].br_startblock + mval[-1].br_blockcount &&
5185 ((flags & XFS_BMAPI_IGSTATE) ||
5186 mval[-1].br_state == mval->br_state)) {
5187 ASSERT(mval->br_startoff ==
5188 mval[-1].br_startoff + mval[-1].br_blockcount);
5189 mval[-1].br_blockcount += mval->br_blockcount;
5191 mval->br_startblock == DELAYSTARTBLOCK &&
5192 mval[-1].br_startblock == DELAYSTARTBLOCK &&
5193 mval->br_startoff ==
5194 mval[-1].br_startoff + mval[-1].br_blockcount) {
5195 mval[-1].br_blockcount += mval->br_blockcount;
5196 mval[-1].br_state = mval->br_state;
5197 } else if (!((n == 0) &&
5198 ((mval->br_startoff + mval->br_blockcount) <=
5204 * If we're done, stop now. Stop when we've allocated
5205 * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise
5206 * the transaction may get too big.
5208 if (bno >= end || n >= *nmap || nallocs >= *nmap)
5211 * Else go on to the next record.
5213 ep = xfs_iext_get_ext(ifp, ++lastx);
5215 if (lastx >= nextents)
5218 xfs_bmbt_get_all(ep, &got);
5220 ifp->if_lastex = lastx;
5223 * Transform from btree to extents, give it cur.
5225 if (tp && XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
5226 XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
5228 error = xfs_bmap_btree_to_extents(tp, ip, cur,
5229 &tmp_logflags, whichfork);
5230 logflags |= tmp_logflags;
5234 ASSERT(ifp->if_ext_max ==
5235 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5236 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
5237 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max);
5239 if (delta && delta->xed_startoff != NULLFILEOFF) {
5240 /* A change was actually made.
5241 * Note that delta->xed_blockount is an offset at this
5242 * point and needs to be converted to a block count.
5244 ASSERT(delta->xed_blockcount > delta->xed_startoff);
5245 delta->xed_blockcount -= delta->xed_startoff;
5249 * Log everything. Do this after conversion, there's no point in
5250 * logging the extent records if we've converted to btree format.
5252 if ((logflags & XFS_ILOG_FEXT(whichfork)) &&
5253 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
5254 logflags &= ~XFS_ILOG_FEXT(whichfork);
5255 else if ((logflags & XFS_ILOG_FBROOT(whichfork)) &&
5256 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
5257 logflags &= ~XFS_ILOG_FBROOT(whichfork);
5259 * Log whatever the flags say, even if error. Otherwise we might miss
5260 * detecting a case where the data is changed, there's an error,
5261 * and it's not logged so we don't shutdown when we should.
5265 xfs_trans_log_inode(tp, ip, logflags);
5269 ASSERT(*firstblock == NULLFSBLOCK ||
5270 XFS_FSB_TO_AGNO(mp, *firstblock) ==
5272 cur->bc_private.b.firstblock) ||
5274 XFS_FSB_TO_AGNO(mp, *firstblock) <
5276 cur->bc_private.b.firstblock)));
5277 *firstblock = cur->bc_private.b.firstblock;
5279 xfs_btree_del_cursor(cur,
5280 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5283 xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
5289 * Map file blocks to filesystem blocks, simple version.
5290 * One block (extent) only, read-only.
5291 * For flags, only the XFS_BMAPI_ATTRFORK flag is examined.
5292 * For the other flag values, the effect is as if XFS_BMAPI_METADATA
5293 * was set and all the others were clear.
5297 xfs_trans_t *tp, /* transaction pointer */
5298 xfs_inode_t *ip, /* incore inode */
5299 int whichfork, /* data or attr fork */
5300 xfs_fsblock_t *fsb, /* output: mapped block */
5301 xfs_fileoff_t bno) /* starting file offs. mapped */
5303 int eof; /* we've hit the end of extents */
5304 int error; /* error return */
5305 xfs_bmbt_irec_t got; /* current file extent record */
5306 xfs_ifork_t *ifp; /* inode fork pointer */
5307 xfs_extnum_t lastx; /* last useful extent number */
5308 xfs_bmbt_irec_t prev; /* previous file extent record */
5310 ifp = XFS_IFORK_PTR(ip, whichfork);
5312 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE &&
5313 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)) {
5314 XFS_ERROR_REPORT("xfs_bmapi_single", XFS_ERRLEVEL_LOW,
5316 return XFS_ERROR(EFSCORRUPTED);
5318 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
5319 return XFS_ERROR(EIO);
5320 XFS_STATS_INC(xs_blk_mapr);
5321 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5322 (error = xfs_iread_extents(tp, ip, whichfork)))
5324 (void)xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5327 * Reading past eof, act as though there's a hole
5330 if (eof || got.br_startoff > bno) {
5334 ASSERT(!ISNULLSTARTBLOCK(got.br_startblock));
5335 ASSERT(bno < got.br_startoff + got.br_blockcount);
5336 *fsb = got.br_startblock + (bno - got.br_startoff);
5337 ifp->if_lastex = lastx;
5342 * Unmap (remove) blocks from a file.
5343 * If nexts is nonzero then the number of extents to remove is limited to
5344 * that value. If not all extents in the block range can be removed then
5349 xfs_trans_t *tp, /* transaction pointer */
5350 struct xfs_inode *ip, /* incore inode */
5351 xfs_fileoff_t bno, /* starting offset to unmap */
5352 xfs_filblks_t len, /* length to unmap in file */
5353 int flags, /* misc flags */
5354 xfs_extnum_t nexts, /* number of extents max */
5355 xfs_fsblock_t *firstblock, /* first allocated block
5356 controls a.g. for allocs */
5357 xfs_bmap_free_t *flist, /* i/o: list extents to free */
5358 xfs_extdelta_t *delta, /* o: change made to incore
5360 int *done) /* set if not done yet */
5362 xfs_btree_cur_t *cur; /* bmap btree cursor */
5363 xfs_bmbt_irec_t del; /* extent being deleted */
5364 int eof; /* is deleting at eof */
5365 xfs_bmbt_rec_host_t *ep; /* extent record pointer */
5366 int error; /* error return value */
5367 xfs_extnum_t extno; /* extent number in list */
5368 xfs_bmbt_irec_t got; /* current extent record */
5369 xfs_ifork_t *ifp; /* inode fork pointer */
5370 int isrt; /* freeing in rt area */
5371 xfs_extnum_t lastx; /* last extent index used */
5372 int logflags; /* transaction logging flags */
5373 xfs_extlen_t mod; /* rt extent offset */
5374 xfs_mount_t *mp; /* mount structure */
5375 xfs_extnum_t nextents; /* number of file extents */
5376 xfs_bmbt_irec_t prev; /* previous extent record */
5377 xfs_fileoff_t start; /* first file offset deleted */
5378 int tmp_logflags; /* partial logging flags */
5379 int wasdel; /* was a delayed alloc extent */
5380 int whichfork; /* data or attribute fork */
5381 int rsvd; /* OK to allocate reserved blocks */
5384 xfs_bunmap_trace(ip, bno, len, flags, (inst_t *)__return_address);
5385 whichfork = (flags & XFS_BMAPI_ATTRFORK) ?
5386 XFS_ATTR_FORK : XFS_DATA_FORK;
5387 ifp = XFS_IFORK_PTR(ip, whichfork);
5389 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
5390 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
5391 XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW,
5393 return XFS_ERROR(EFSCORRUPTED);
5396 if (XFS_FORCED_SHUTDOWN(mp))
5397 return XFS_ERROR(EIO);
5398 rsvd = (flags & XFS_BMAPI_RSVBLOCKS) != 0;
5401 ASSERT(ifp->if_ext_max ==
5402 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5403 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5404 (error = xfs_iread_extents(tp, ip, whichfork)))
5406 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
5407 if (nextents == 0) {
5411 XFS_STATS_INC(xs_blk_unmap);
5412 isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
5414 bno = start + len - 1;
5415 ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got,
5418 delta->xed_startoff = NULLFILEOFF;
5419 delta->xed_blockcount = 0;
5422 * Check to see if the given block number is past the end of the
5423 * file, back up to the last block if so...
5426 ep = xfs_iext_get_ext(ifp, --lastx);
5427 xfs_bmbt_get_all(ep, &got);
5428 bno = got.br_startoff + got.br_blockcount - 1;
5431 if (ifp->if_flags & XFS_IFBROOT) {
5432 ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
5433 cur = xfs_btree_init_cursor(mp, tp, NULL, 0, XFS_BTNUM_BMAP, ip,
5435 cur->bc_private.b.firstblock = *firstblock;
5436 cur->bc_private.b.flist = flist;
5437 cur->bc_private.b.flags = 0;
5441 while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 &&
5442 (nexts == 0 || extno < nexts)) {
5444 * Is the found extent after a hole in which bno lives?
5445 * Just back up to the previous extent, if so.
5447 if (got.br_startoff > bno) {
5450 ep = xfs_iext_get_ext(ifp, lastx);
5451 xfs_bmbt_get_all(ep, &got);
5454 * Is the last block of this extent before the range
5455 * we're supposed to delete? If so, we're done.
5457 bno = XFS_FILEOFF_MIN(bno,
5458 got.br_startoff + got.br_blockcount - 1);
5462 * Then deal with the (possibly delayed) allocated space
5467 wasdel = ISNULLSTARTBLOCK(del.br_startblock);
5468 if (got.br_startoff < start) {
5469 del.br_startoff = start;
5470 del.br_blockcount -= start - got.br_startoff;
5472 del.br_startblock += start - got.br_startoff;
5474 if (del.br_startoff + del.br_blockcount > bno + 1)
5475 del.br_blockcount = bno + 1 - del.br_startoff;
5476 sum = del.br_startblock + del.br_blockcount;
5478 (mod = do_mod(sum, mp->m_sb.sb_rextsize))) {
5480 * Realtime extent not lined up at the end.
5481 * The extent could have been split into written
5482 * and unwritten pieces, or we could just be
5483 * unmapping part of it. But we can't really
5484 * get rid of part of a realtime extent.
5486 if (del.br_state == XFS_EXT_UNWRITTEN ||
5487 !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
5489 * This piece is unwritten, or we're not
5490 * using unwritten extents. Skip over it.
5493 bno -= mod > del.br_blockcount ?
5494 del.br_blockcount : mod;
5495 if (bno < got.br_startoff) {
5497 xfs_bmbt_get_all(xfs_iext_get_ext(
5503 * It's written, turn it unwritten.
5504 * This is better than zeroing it.
5506 ASSERT(del.br_state == XFS_EXT_NORM);
5507 ASSERT(xfs_trans_get_block_res(tp) > 0);
5509 * If this spans a realtime extent boundary,
5510 * chop it back to the start of the one we end at.
5512 if (del.br_blockcount > mod) {
5513 del.br_startoff += del.br_blockcount - mod;
5514 del.br_startblock += del.br_blockcount - mod;
5515 del.br_blockcount = mod;
5517 del.br_state = XFS_EXT_UNWRITTEN;
5518 error = xfs_bmap_add_extent(ip, lastx, &cur, &del,
5519 firstblock, flist, &logflags, delta,
5525 if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) {
5527 * Realtime extent is lined up at the end but not
5528 * at the front. We'll get rid of full extents if
5531 mod = mp->m_sb.sb_rextsize - mod;
5532 if (del.br_blockcount > mod) {
5533 del.br_blockcount -= mod;
5534 del.br_startoff += mod;
5535 del.br_startblock += mod;
5536 } else if ((del.br_startoff == start &&
5537 (del.br_state == XFS_EXT_UNWRITTEN ||
5538 xfs_trans_get_block_res(tp) == 0)) ||
5539 !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) {
5541 * Can't make it unwritten. There isn't
5542 * a full extent here so just skip it.
5544 ASSERT(bno >= del.br_blockcount);
5545 bno -= del.br_blockcount;
5546 if (bno < got.br_startoff) {
5548 xfs_bmbt_get_all(--ep, &got);
5551 } else if (del.br_state == XFS_EXT_UNWRITTEN) {
5553 * This one is already unwritten.
5554 * It must have a written left neighbor.
5555 * Unwrite the killed part of that one and
5559 xfs_bmbt_get_all(xfs_iext_get_ext(ifp,
5561 ASSERT(prev.br_state == XFS_EXT_NORM);
5562 ASSERT(!ISNULLSTARTBLOCK(prev.br_startblock));
5563 ASSERT(del.br_startblock ==
5564 prev.br_startblock + prev.br_blockcount);
5565 if (prev.br_startoff < start) {
5566 mod = start - prev.br_startoff;
5567 prev.br_blockcount -= mod;
5568 prev.br_startblock += mod;
5569 prev.br_startoff = start;
5571 prev.br_state = XFS_EXT_UNWRITTEN;
5572 error = xfs_bmap_add_extent(ip, lastx - 1, &cur,
5573 &prev, firstblock, flist, &logflags,
5574 delta, XFS_DATA_FORK, 0);
5579 ASSERT(del.br_state == XFS_EXT_NORM);
5580 del.br_state = XFS_EXT_UNWRITTEN;
5581 error = xfs_bmap_add_extent(ip, lastx, &cur,
5582 &del, firstblock, flist, &logflags,
5583 delta, XFS_DATA_FORK, 0);
5590 ASSERT(STARTBLOCKVAL(del.br_startblock) > 0);
5591 /* Update realtime/data freespace, unreserve quota */
5593 xfs_filblks_t rtexts;
5595 rtexts = XFS_FSB_TO_B(mp, del.br_blockcount);
5596 do_div(rtexts, mp->m_sb.sb_rextsize);
5597 xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS,
5598 (int64_t)rtexts, rsvd);
5599 (void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
5600 NULL, ip, -((long)del.br_blockcount), 0,
5601 XFS_QMOPT_RES_RTBLKS);
5603 xfs_mod_incore_sb(mp, XFS_SBS_FDBLOCKS,
5604 (int64_t)del.br_blockcount, rsvd);
5605 (void)XFS_TRANS_RESERVE_QUOTA_NBLKS(mp,
5606 NULL, ip, -((long)del.br_blockcount), 0,
5607 XFS_QMOPT_RES_REGBLKS);
5609 ip->i_delayed_blks -= del.br_blockcount;
5611 cur->bc_private.b.flags |=
5612 XFS_BTCUR_BPRV_WASDEL;
5614 cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL;
5616 * If it's the case where the directory code is running
5617 * with no block reservation, and the deleted block is in
5618 * the middle of its extent, and the resulting insert
5619 * of an extent would cause transformation to btree format,
5620 * then reject it. The calling code will then swap
5621 * blocks around instead.
5622 * We have to do this now, rather than waiting for the
5623 * conversion to btree format, since the transaction
5626 if (!wasdel && xfs_trans_get_block_res(tp) == 0 &&
5627 XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5628 XFS_IFORK_NEXTENTS(ip, whichfork) >= ifp->if_ext_max &&
5629 del.br_startoff > got.br_startoff &&
5630 del.br_startoff + del.br_blockcount <
5631 got.br_startoff + got.br_blockcount) {
5632 error = XFS_ERROR(ENOSPC);
5635 error = xfs_bmap_del_extent(ip, tp, lastx, flist, cur, &del,
5636 &tmp_logflags, delta, whichfork, rsvd);
5637 logflags |= tmp_logflags;
5640 bno = del.br_startoff - 1;
5642 lastx = ifp->if_lastex;
5644 * If not done go on to the next (previous) record.
5645 * Reset ep in case the extents array was re-alloced.
5647 ep = xfs_iext_get_ext(ifp, lastx);
5648 if (bno != (xfs_fileoff_t)-1 && bno >= start) {
5649 if (lastx >= XFS_IFORK_NEXTENTS(ip, whichfork) ||
5650 xfs_bmbt_get_startoff(ep) > bno) {
5652 ep = xfs_iext_get_ext(ifp, lastx);
5655 xfs_bmbt_get_all(ep, &got);
5659 ifp->if_lastex = lastx;
5660 *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0;
5661 ASSERT(ifp->if_ext_max ==
5662 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5664 * Convert to a btree if necessary.
5666 if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS &&
5667 XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) {
5668 ASSERT(cur == NULL);
5669 error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist,
5670 &cur, 0, &tmp_logflags, whichfork);
5671 logflags |= tmp_logflags;
5676 * transform from btree to extents, give it cur
5678 else if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE &&
5679 XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) {
5680 ASSERT(cur != NULL);
5681 error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
5683 logflags |= tmp_logflags;
5688 * transform from extents to local?
5690 ASSERT(ifp->if_ext_max ==
5691 XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t));
5693 if (delta && delta->xed_startoff != NULLFILEOFF) {
5694 /* A change was actually made.
5695 * Note that delta->xed_blockount is an offset at this
5696 * point and needs to be converted to a block count.
5698 ASSERT(delta->xed_blockcount > delta->xed_startoff);
5699 delta->xed_blockcount -= delta->xed_startoff;
5703 * Log everything. Do this after conversion, there's no point in
5704 * logging the extent records if we've converted to btree format.
5706 if ((logflags & XFS_ILOG_FEXT(whichfork)) &&
5707 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
5708 logflags &= ~XFS_ILOG_FEXT(whichfork);
5709 else if ((logflags & XFS_ILOG_FBROOT(whichfork)) &&
5710 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
5711 logflags &= ~XFS_ILOG_FBROOT(whichfork);
5713 * Log inode even in the error case, if the transaction
5714 * is dirty we'll need to shut down the filesystem.
5717 xfs_trans_log_inode(tp, ip, logflags);
5720 *firstblock = cur->bc_private.b.firstblock;
5721 cur->bc_private.b.allocated = 0;
5723 xfs_btree_del_cursor(cur,
5724 error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
5730 * returns 1 for success, 0 if we failed to map the extent.
5733 xfs_getbmapx_fix_eof_hole(
5734 xfs_inode_t *ip, /* xfs incore inode pointer */
5735 struct getbmap *out, /* output structure */
5736 int prealloced, /* this is a file with
5737 * preallocated data space */
5738 __int64_t end, /* last block requested */
5739 xfs_fsblock_t startblock)
5742 xfs_mount_t *mp; /* file system mount point */
5744 if (startblock == HOLESTARTBLOCK) {
5746 out->bmv_block = -1;
5747 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, ip->i_size));
5748 fixlen -= out->bmv_offset;
5749 if (prealloced && out->bmv_offset + out->bmv_length == end) {
5750 /* Came to hole at EOF. Trim it. */
5753 out->bmv_length = fixlen;
5756 out->bmv_block = XFS_FSB_TO_DB(ip, startblock);
5763 * Fcntl interface to xfs_bmapi.
5765 int /* error code */
5767 bhv_desc_t *bdp, /* XFS behavior descriptor*/
5768 struct getbmap *bmv, /* user bmap structure */
5769 void __user *ap, /* pointer to user's array */
5770 int interface) /* interface flags */
5772 __int64_t bmvend; /* last block requested */
5773 int error; /* return value */
5774 __int64_t fixlen; /* length for -1 case */
5775 int i; /* extent number */
5776 xfs_inode_t *ip; /* xfs incore inode pointer */
5777 bhv_vnode_t *vp; /* corresponding vnode */
5778 int lock; /* lock state */
5779 xfs_bmbt_irec_t *map; /* buffer for user's data */
5780 xfs_mount_t *mp; /* file system mount point */
5781 int nex; /* # of user extents can do */
5782 int nexleft; /* # of user extents left */
5783 int subnex; /* # of bmapi's can do */
5784 int nmap; /* number of map entries */
5785 struct getbmap out; /* output structure */
5786 int whichfork; /* data or attr fork */
5787 int prealloced; /* this is a file with
5788 * preallocated data space */
5789 int sh_unwritten; /* true, if unwritten */
5790 /* extents listed separately */
5791 int bmapi_flags; /* flags for xfs_bmapi */
5792 __int32_t oflags; /* getbmapx bmv_oflags field */
5794 vp = BHV_TO_VNODE(bdp);
5795 ip = XFS_BHVTOI(bdp);
5798 whichfork = interface & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
5799 sh_unwritten = (interface & BMV_IF_PREALLOC) != 0;
5801 /* If the BMV_IF_NO_DMAPI_READ interface bit specified, do not
5802 * generate a DMAPI read event. Otherwise, if the DM_EVENT_READ
5803 * bit is set for the file, generate a read event in order
5804 * that the DMAPI application may do its thing before we return
5805 * the extents. Usually this means restoring user file data to
5806 * regions of the file that look like holes.
5808 * The "old behavior" (from XFS_IOC_GETBMAP) is to not specify
5809 * BMV_IF_NO_DMAPI_READ so that read events are generated.
5810 * If this were not true, callers of ioctl( XFS_IOC_GETBMAP )
5811 * could misinterpret holes in a DMAPI file as true holes,
5812 * when in fact they may represent offline user data.
5814 if ( (interface & BMV_IF_NO_DMAPI_READ) == 0
5815 && DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ)
5816 && whichfork == XFS_DATA_FORK) {
5818 error = XFS_SEND_DATA(mp, DM_EVENT_READ, vp, 0, 0, 0, NULL);
5820 return XFS_ERROR(error);
5823 if (whichfork == XFS_ATTR_FORK) {
5824 if (XFS_IFORK_Q(ip)) {
5825 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
5826 ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
5827 ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
5828 return XFS_ERROR(EINVAL);
5829 } else if (unlikely(
5830 ip->i_d.di_aformat != 0 &&
5831 ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
5832 XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
5834 return XFS_ERROR(EFSCORRUPTED);
5836 } else if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
5837 ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
5838 ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
5839 return XFS_ERROR(EINVAL);
5840 if (whichfork == XFS_DATA_FORK) {
5841 if (xfs_get_extsz_hint(ip) ||
5842 ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
5844 fixlen = XFS_MAXIOFFSET(mp);
5847 fixlen = ip->i_size;
5854 if (bmv->bmv_length == -1) {
5855 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
5856 bmv->bmv_length = MAX( (__int64_t)(fixlen - bmv->bmv_offset),
5858 } else if (bmv->bmv_length < 0)
5859 return XFS_ERROR(EINVAL);
5860 if (bmv->bmv_length == 0) {
5861 bmv->bmv_entries = 0;
5864 nex = bmv->bmv_count - 1;
5866 return XFS_ERROR(EINVAL);
5867 bmvend = bmv->bmv_offset + bmv->bmv_length;
5869 xfs_ilock(ip, XFS_IOLOCK_SHARED);
5871 if (whichfork == XFS_DATA_FORK &&
5872 (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size)) {
5873 /* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */
5874 error = bhv_vop_flush_pages(vp, (xfs_off_t)0, -1, 0, FI_REMAPF);
5877 ASSERT(whichfork == XFS_ATTR_FORK || ip->i_delayed_blks == 0);
5879 lock = xfs_ilock_map_shared(ip);
5882 * Don't let nex be bigger than the number of extents
5883 * we can have assuming alternating holes and real extents.
5885 if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
5886 nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
5888 bmapi_flags = XFS_BMAPI_AFLAG(whichfork) |
5889 ((sh_unwritten) ? 0 : XFS_BMAPI_IGSTATE);
5892 * Allocate enough space to handle "subnex" maps at a time.
5895 map = kmem_alloc(subnex * sizeof(*map), KM_SLEEP);
5897 bmv->bmv_entries = 0;
5899 if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0) {
5901 goto unlock_and_return;
5907 nmap = (nexleft > subnex) ? subnex : nexleft;
5908 error = xfs_bmapi(NULL, ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
5909 XFS_BB_TO_FSB(mp, bmv->bmv_length),
5910 bmapi_flags, NULL, 0, map, &nmap,
5913 goto unlock_and_return;
5914 ASSERT(nmap <= subnex);
5916 for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
5918 oflags = (map[i].br_state == XFS_EXT_UNWRITTEN) ?
5919 BMV_OF_PREALLOC : 0;
5920 out.bmv_offset = XFS_FSB_TO_BB(mp, map[i].br_startoff);
5921 out.bmv_length = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
5922 ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
5923 if (map[i].br_startblock == HOLESTARTBLOCK &&
5924 whichfork == XFS_ATTR_FORK) {
5925 /* came to the end of attribute fork */
5926 goto unlock_and_return;
5928 if (!xfs_getbmapx_fix_eof_hole(ip, &out,
5930 map[i].br_startblock)) {
5931 goto unlock_and_return;
5934 /* return either getbmap/getbmapx structure. */
5935 if (interface & BMV_IF_EXTENDED) {
5936 struct getbmapx outx;
5938 GETBMAP_CONVERT(out,outx);
5939 outx.bmv_oflags = oflags;
5940 outx.bmv_unused1 = outx.bmv_unused2 = 0;
5941 if (copy_to_user(ap, &outx,
5943 error = XFS_ERROR(EFAULT);
5944 goto unlock_and_return;
5947 if (copy_to_user(ap, &out,
5949 error = XFS_ERROR(EFAULT);
5950 goto unlock_and_return;
5954 out.bmv_offset + out.bmv_length;
5955 bmv->bmv_length = MAX((__int64_t)0,
5956 (__int64_t)(bmvend - bmv->bmv_offset));
5958 ap = (interface & BMV_IF_EXTENDED) ?
5960 ((struct getbmapx __user *)ap + 1) :
5962 ((struct getbmap __user *)ap + 1);
5965 } while (nmap && nexleft && bmv->bmv_length);
5968 xfs_iunlock_map_shared(ip, lock);
5969 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
5971 kmem_free(map, subnex * sizeof(*map));
5977 * Check the last inode extent to determine whether this allocation will result
5978 * in blocks being allocated at the end of the file. When we allocate new data
5979 * blocks at the end of the file which do not start at the previous data block,
5980 * we will try to align the new blocks at stripe unit boundaries.
5982 STATIC int /* error */
5984 xfs_inode_t *ip, /* incore inode pointer */
5985 xfs_fileoff_t off, /* file offset in fsblocks */
5986 int whichfork, /* data or attribute fork */
5987 char *aeof) /* return value */
5989 int error; /* error return value */
5990 xfs_ifork_t *ifp; /* inode fork pointer */
5991 xfs_bmbt_rec_host_t *lastrec; /* extent record pointer */
5992 xfs_extnum_t nextents; /* number of file extents */
5993 xfs_bmbt_irec_t s; /* expanded extent record */
5995 ASSERT(whichfork == XFS_DATA_FORK);
5996 ifp = XFS_IFORK_PTR(ip, whichfork);
5997 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
5998 (error = xfs_iread_extents(NULL, ip, whichfork)))
6000 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
6001 if (nextents == 0) {
6006 * Go to the last extent
6008 lastrec = xfs_iext_get_ext(ifp, nextents - 1);
6009 xfs_bmbt_get_all(lastrec, &s);
6011 * Check we are allocating in the last extent (for delayed allocations)
6012 * or past the last extent for non-delayed allocations.
6014 *aeof = (off >= s.br_startoff &&
6015 off < s.br_startoff + s.br_blockcount &&
6016 ISNULLSTARTBLOCK(s.br_startblock)) ||
6017 off >= s.br_startoff + s.br_blockcount;
6022 * Check if the endoff is outside the last extent. If so the caller will grow
6023 * the allocation to a stripe unit boundary.
6027 xfs_inode_t *ip, /* incore inode pointer */
6028 xfs_fileoff_t endoff, /* file offset in fsblocks */
6029 int whichfork, /* data or attribute fork */
6030 int *eof) /* result value */
6032 xfs_fsblock_t blockcount; /* extent block count */
6033 int error; /* error return value */
6034 xfs_ifork_t *ifp; /* inode fork pointer */
6035 xfs_bmbt_rec_host_t *lastrec; /* extent record pointer */
6036 xfs_extnum_t nextents; /* number of file extents */
6037 xfs_fileoff_t startoff; /* extent starting file offset */
6039 ASSERT(whichfork == XFS_DATA_FORK);
6040 ifp = XFS_IFORK_PTR(ip, whichfork);
6041 if (!(ifp->if_flags & XFS_IFEXTENTS) &&
6042 (error = xfs_iread_extents(NULL, ip, whichfork)))
6044 nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
6045 if (nextents == 0) {
6050 * Go to the last extent
6052 lastrec = xfs_iext_get_ext(ifp, nextents - 1);
6053 startoff = xfs_bmbt_get_startoff(lastrec);
6054 blockcount = xfs_bmbt_get_blockcount(lastrec);
6055 *eof = endoff >= startoff + blockcount;
6063 xfs_btree_cur_t *cur,
6073 for(i = 0; i < XFS_BTREE_MAXLEVELS; i++) {
6074 bp = cur->bc_bufs[i];
6076 if (XFS_BUF_ADDR(bp) == bno)
6077 break; /* Found it */
6079 if (i == XFS_BTREE_MAXLEVELS)
6082 if (!bp) { /* Chase down all the log items to see if the bp is there */
6083 xfs_log_item_chunk_t *licp;
6087 licp = &tp->t_items;
6088 while (!bp && licp != NULL) {
6089 if (XFS_LIC_ARE_ALL_FREE(licp)) {
6090 licp = licp->lic_next;
6093 for (i = 0; i < licp->lic_unused; i++) {
6094 xfs_log_item_desc_t *lidp;
6095 xfs_log_item_t *lip;
6096 xfs_buf_log_item_t *bip;
6099 if (XFS_LIC_ISFREE(licp, i)) {
6103 lidp = XFS_LIC_SLOT(licp, i);
6104 lip = lidp->lid_item;
6105 if (lip->li_type != XFS_LI_BUF)
6108 bip = (xfs_buf_log_item_t *)lip;
6111 if (XFS_BUF_ADDR(lbp) == bno) {
6113 break; /* Found it */
6116 licp = licp->lic_next;
6124 xfs_bmbt_block_t *block,
6130 __be64 *pp, *thispa; /* pointer to block address */
6131 xfs_bmbt_key_t *prevp, *keyp;
6133 ASSERT(be16_to_cpu(block->bb_level) > 0);
6136 for( i = 1; i <= be16_to_cpu(block->bb_numrecs); i++) {
6137 dmxr = mp->m_bmap_dmxr[0];
6140 keyp = XFS_BMAP_BROOT_KEY_ADDR(block, i, sz);
6142 keyp = XFS_BTREE_KEY_ADDR(xfs_bmbt, block, i);
6146 xfs_btree_check_key(XFS_BTNUM_BMAP, prevp, keyp);
6151 * Compare the block numbers to see if there are dups.
6155 pp = XFS_BMAP_BROOT_PTR_ADDR(block, i, sz);
6157 pp = XFS_BTREE_PTR_ADDR(xfs_bmbt, block, i, dmxr);
6159 for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) {
6161 thispa = XFS_BMAP_BROOT_PTR_ADDR(block, j, sz);
6163 thispa = XFS_BTREE_PTR_ADDR(xfs_bmbt, block, j,
6166 if (*thispa == *pp) {
6167 cmn_err(CE_WARN, "%s: thispa(%d) == pp(%d) %Ld",
6169 (unsigned long long)be64_to_cpu(*thispa));
6170 panic("%s: ptrs are equal in node\n",
6178 * Check that the extents for the inode ip are in the right order in all
6183 xfs_bmap_check_leaf_extents(
6184 xfs_btree_cur_t *cur, /* btree cursor or null */
6185 xfs_inode_t *ip, /* incore inode pointer */
6186 int whichfork) /* data or attr fork */
6188 xfs_bmbt_block_t *block; /* current btree block */
6189 xfs_fsblock_t bno; /* block # of "block" */
6190 xfs_buf_t *bp; /* buffer for "block" */
6191 int error; /* error return value */
6192 xfs_extnum_t i=0, j; /* index into the extents list */
6193 xfs_ifork_t *ifp; /* fork structure */
6194 int level; /* btree level, for checking */
6195 xfs_mount_t *mp; /* file system mount structure */
6196 __be64 *pp; /* pointer to block address */
6197 xfs_bmbt_rec_t *ep; /* pointer to current extent */
6198 xfs_bmbt_rec_t *lastp; /* pointer to previous extent */
6199 xfs_bmbt_rec_t *nextp; /* pointer to next extent */
6202 if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) {
6208 ifp = XFS_IFORK_PTR(ip, whichfork);
6209 block = ifp->if_broot;
6211 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
6213 level = be16_to_cpu(block->bb_level);
6215 xfs_check_block(block, mp, 1, ifp->if_broot_bytes);
6216 pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes);
6217 bno = be64_to_cpu(*pp);
6219 ASSERT(bno != NULLDFSBNO);
6220 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
6221 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
6224 * Go down the tree until leaf level is reached, following the first
6225 * pointer (leftmost) at each level.
6227 while (level-- > 0) {
6228 /* See if buf is in cur first */
6229 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
6235 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
6236 XFS_BMAP_BTREE_REF)))
6238 block = XFS_BUF_TO_BMBT_BLOCK(bp);
6239 XFS_WANT_CORRUPTED_GOTO(
6240 XFS_BMAP_SANITY_CHECK(mp, block, level),
6246 * Check this block for basic sanity (increasing keys and
6247 * no duplicate blocks).
6250 xfs_check_block(block, mp, 0, 0);
6251 pp = XFS_BTREE_PTR_ADDR(xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]);
6252 bno = be64_to_cpu(*pp);
6253 XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0);
6256 xfs_trans_brelse(NULL, bp);
6261 * Here with bp and block set to the leftmost leaf node in the tree.
6266 * Loop over all leaf nodes checking that all extents are in the right order.
6270 xfs_fsblock_t nextbno;
6271 xfs_extnum_t num_recs;
6274 num_recs = be16_to_cpu(block->bb_numrecs);
6277 * Read-ahead the next leaf block, if any.
6280 nextbno = be64_to_cpu(block->bb_rightsib);
6283 * Check all the extents to make sure they are OK.
6284 * If we had a previous block, the last entry should
6285 * conform with the first entry in this one.
6288 ep = XFS_BTREE_REC_ADDR(xfs_bmbt, block, 1);
6289 for (j = 1; j < num_recs; j++) {
6290 nextp = XFS_BTREE_REC_ADDR(xfs_bmbt, block, j + 1);
6292 xfs_btree_check_rec(XFS_BTNUM_BMAP,
6293 (void *)lastp, (void *)ep);
6295 xfs_btree_check_rec(XFS_BTNUM_BMAP, (void *)ep,
6304 xfs_trans_brelse(NULL, bp);
6308 * If we've reached the end, stop.
6310 if (bno == NULLFSBLOCK)
6313 bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
6319 if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
6320 XFS_BMAP_BTREE_REF)))
6322 block = XFS_BUF_TO_BMBT_BLOCK(bp);
6326 xfs_trans_brelse(NULL, bp);
6331 cmn_err(CE_WARN, "%s: at error0", __FUNCTION__);
6333 xfs_trans_brelse(NULL, bp);
6335 cmn_err(CE_WARN, "%s: BAD after btree leaves for %d extents",
6337 panic("%s: CORRUPTED BTREE OR SOMETHING", __FUNCTION__);
6343 * Count fsblocks of the given fork.
6346 xfs_bmap_count_blocks(
6347 xfs_trans_t *tp, /* transaction pointer */
6348 xfs_inode_t *ip, /* incore inode */
6349 int whichfork, /* data or attr fork */
6350 int *count) /* out: count of blocks */
6352 xfs_bmbt_block_t *block; /* current btree block */
6353 xfs_fsblock_t bno; /* block # of "block" */
6354 xfs_ifork_t *ifp; /* fork structure */
6355 int level; /* btree level, for checking */
6356 xfs_mount_t *mp; /* file system mount structure */
6357 __be64 *pp; /* pointer to block address */
6361 ifp = XFS_IFORK_PTR(ip, whichfork);
6362 if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
6363 if (unlikely(xfs_bmap_count_leaves(ifp, 0,
6364 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
6366 XFS_ERROR_REPORT("xfs_bmap_count_blocks(1)",
6367 XFS_ERRLEVEL_LOW, mp);
6368 return XFS_ERROR(EFSCORRUPTED);
6374 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
6376 block = ifp->if_broot;
6377 level = be16_to_cpu(block->bb_level);
6379 pp = XFS_BMAP_BROOT_PTR_ADDR(block, 1, ifp->if_broot_bytes);
6380 bno = be64_to_cpu(*pp);
6381 ASSERT(bno != NULLDFSBNO);
6382 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
6383 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
6385 if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
6386 XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
6388 return XFS_ERROR(EFSCORRUPTED);
6395 * Recursively walks each level of a btree
6396 * to count total fsblocks is use.
6399 xfs_bmap_count_tree(
6400 xfs_mount_t *mp, /* file system mount point */
6401 xfs_trans_t *tp, /* transaction pointer */
6402 xfs_ifork_t *ifp, /* inode fork pointer */
6403 xfs_fsblock_t blockno, /* file system block number */
6404 int levelin, /* level in btree */
6405 int *count) /* Count of blocks */
6408 xfs_buf_t *bp, *nbp;
6409 int level = levelin;
6411 xfs_fsblock_t bno = blockno;
6412 xfs_fsblock_t nextbno;
6413 xfs_bmbt_block_t *block, *nextblock;
6416 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF)))
6419 block = XFS_BUF_TO_BMBT_BLOCK(bp);
6422 /* Not at node above leafs, count this level of nodes */
6423 nextbno = be64_to_cpu(block->bb_rightsib);
6424 while (nextbno != NULLFSBLOCK) {
6425 if ((error = xfs_btree_read_bufl(mp, tp, nextbno,
6426 0, &nbp, XFS_BMAP_BTREE_REF)))
6429 nextblock = XFS_BUF_TO_BMBT_BLOCK(nbp);
6430 nextbno = be64_to_cpu(nextblock->bb_rightsib);
6431 xfs_trans_brelse(tp, nbp);
6434 /* Dive to the next level */
6435 pp = XFS_BTREE_PTR_ADDR(xfs_bmbt, block, 1, mp->m_bmap_dmxr[1]);
6436 bno = be64_to_cpu(*pp);
6437 if (unlikely((error =
6438 xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
6439 xfs_trans_brelse(tp, bp);
6440 XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
6441 XFS_ERRLEVEL_LOW, mp);
6442 return XFS_ERROR(EFSCORRUPTED);
6444 xfs_trans_brelse(tp, bp);
6446 /* count all level 1 nodes and their leaves */
6448 nextbno = be64_to_cpu(block->bb_rightsib);
6449 numrecs = be16_to_cpu(block->bb_numrecs);
6450 if (unlikely(xfs_bmap_disk_count_leaves(0,
6451 block, numrecs, count) < 0)) {
6452 xfs_trans_brelse(tp, bp);
6453 XFS_ERROR_REPORT("xfs_bmap_count_tree(2)",
6454 XFS_ERRLEVEL_LOW, mp);
6455 return XFS_ERROR(EFSCORRUPTED);
6457 xfs_trans_brelse(tp, bp);
6458 if (nextbno == NULLFSBLOCK)
6461 if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
6462 XFS_BMAP_BTREE_REF)))
6465 block = XFS_BUF_TO_BMBT_BLOCK(bp);
6472 * Count leaf blocks given a range of extent records.
6475 xfs_bmap_count_leaves(
6483 for (b = 0; b < numrecs; b++) {
6484 xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b);
6485 *count += xfs_bmbt_get_blockcount(frp);
6491 * Count leaf blocks given a range of extent records originally
6495 xfs_bmap_disk_count_leaves(
6497 xfs_bmbt_block_t *block,
6502 xfs_bmbt_rec_t *frp;
6504 for (b = 1; b <= numrecs; b++) {
6505 frp = XFS_BTREE_REC_ADDR(xfs_bmbt, block, idx + b);
6506 *count += xfs_bmbt_disk_get_blockcount(frp);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blob