2 * Copyright (c) 2000-2003,2005 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_dmapi.h"
29 #include "xfs_mount.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_alloc_btree.h"
32 #include "xfs_ialloc_btree.h"
33 #include "xfs_dir2_sf.h"
34 #include "xfs_attr_sf.h"
35 #include "xfs_dinode.h"
36 #include "xfs_inode.h"
37 #include "xfs_inode_item.h"
38 #include "xfs_alloc.h"
39 #include "xfs_btree.h"
40 #include "xfs_btree_trace.h"
41 #include "xfs_ialloc.h"
42 #include "xfs_itable.h"
44 #include "xfs_error.h"
45 #include "xfs_quota.h"
48 * Determine the extent state.
57 ASSERT(blks != 0); /* saved for DMIG */
58 return XFS_EXT_UNWRITTEN;
64 * Convert on-disk form of btree root to in-memory form.
69 xfs_bmdr_block_t *dblock,
71 struct xfs_btree_block *rblock,
80 rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC);
81 rblock->bb_level = dblock->bb_level;
82 ASSERT(be16_to_cpu(rblock->bb_level) > 0);
83 rblock->bb_numrecs = dblock->bb_numrecs;
84 rblock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO);
85 rblock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO);
86 dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0);
87 fkp = XFS_BMDR_KEY_ADDR(dblock, 1);
88 tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
89 fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
90 tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
91 dmxr = be16_to_cpu(dblock->bb_numrecs);
92 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
93 memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
97 * Convert a compressed bmap extent record to an uncompressed form.
98 * This code must be in sync with the routines xfs_bmbt_get_startoff,
99 * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
111 ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN));
112 s->br_startoff = ((xfs_fileoff_t)l0 &
113 xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
115 s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) |
116 (((xfs_fsblock_t)l1) >> 21);
122 b = (((xfs_dfsbno_t)l0 & xfs_mask64lo(9)) << 43) |
123 (((xfs_dfsbno_t)l1) >> 21);
124 ASSERT((b >> 32) == 0 || isnulldstartblock(b));
125 s->br_startblock = (xfs_fsblock_t)b;
128 s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21);
130 #endif /* XFS_BIG_BLKNOS */
131 s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21));
132 /* This is xfs_extent_state() in-line */
134 ASSERT(s->br_blockcount != 0); /* saved for DMIG */
135 st = XFS_EXT_UNWRITTEN;
143 xfs_bmbt_rec_host_t *r,
146 __xfs_bmbt_get_all(r->l0, r->l1, s);
150 * Extract the blockcount field from an in memory bmap extent record.
153 xfs_bmbt_get_blockcount(
154 xfs_bmbt_rec_host_t *r)
156 return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21));
160 * Extract the startblock field from an in memory bmap extent record.
163 xfs_bmbt_get_startblock(
164 xfs_bmbt_rec_host_t *r)
167 return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) |
168 (((xfs_fsblock_t)r->l1) >> 21);
173 b = (((xfs_dfsbno_t)r->l0 & xfs_mask64lo(9)) << 43) |
174 (((xfs_dfsbno_t)r->l1) >> 21);
175 ASSERT((b >> 32) == 0 || isnulldstartblock(b));
176 return (xfs_fsblock_t)b;
178 return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21);
180 #endif /* XFS_BIG_BLKNOS */
184 * Extract the startoff field from an in memory bmap extent record.
187 xfs_bmbt_get_startoff(
188 xfs_bmbt_rec_host_t *r)
190 return ((xfs_fileoff_t)r->l0 &
191 xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
196 xfs_bmbt_rec_host_t *r)
200 ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN));
201 return xfs_extent_state(xfs_bmbt_get_blockcount(r),
205 /* Endian flipping versions of the bmbt extraction functions */
207 xfs_bmbt_disk_get_all(
211 __xfs_bmbt_get_all(get_unaligned_be64(&r->l0),
212 get_unaligned_be64(&r->l1), s);
216 * Extract the blockcount field from an on disk bmap extent record.
219 xfs_bmbt_disk_get_blockcount(
222 return (xfs_filblks_t)(be64_to_cpu(r->l1) & xfs_mask64lo(21));
226 * Extract the startoff field from a disk format bmap extent record.
229 xfs_bmbt_disk_get_startoff(
232 return ((xfs_fileoff_t)be64_to_cpu(r->l0) &
233 xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
238 * Set all the fields in a bmap extent record from the arguments.
242 xfs_bmbt_rec_host_t *r,
243 xfs_fileoff_t startoff,
244 xfs_fsblock_t startblock,
245 xfs_filblks_t blockcount,
248 int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
250 ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
251 ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
252 ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
255 ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
257 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
258 ((xfs_bmbt_rec_base_t)startoff << 9) |
259 ((xfs_bmbt_rec_base_t)startblock >> 43);
260 r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
261 ((xfs_bmbt_rec_base_t)blockcount &
262 (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
263 #else /* !XFS_BIG_BLKNOS */
264 if (isnullstartblock(startblock)) {
265 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
266 ((xfs_bmbt_rec_base_t)startoff << 9) |
267 (xfs_bmbt_rec_base_t)xfs_mask64lo(9);
268 r->l1 = xfs_mask64hi(11) |
269 ((xfs_bmbt_rec_base_t)startblock << 21) |
270 ((xfs_bmbt_rec_base_t)blockcount &
271 (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
273 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
274 ((xfs_bmbt_rec_base_t)startoff << 9);
275 r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
276 ((xfs_bmbt_rec_base_t)blockcount &
277 (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
279 #endif /* XFS_BIG_BLKNOS */
283 * Set all the fields in a bmap extent record from the uncompressed form.
287 xfs_bmbt_rec_host_t *r,
290 xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock,
291 s->br_blockcount, s->br_state);
296 * Set all the fields in a disk format bmap extent record from the arguments.
299 xfs_bmbt_disk_set_allf(
301 xfs_fileoff_t startoff,
302 xfs_fsblock_t startblock,
303 xfs_filblks_t blockcount,
306 int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
308 ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
309 ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0);
310 ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
313 ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0);
316 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
317 ((xfs_bmbt_rec_base_t)startoff << 9) |
318 ((xfs_bmbt_rec_base_t)startblock >> 43));
320 ((xfs_bmbt_rec_base_t)startblock << 21) |
321 ((xfs_bmbt_rec_base_t)blockcount &
322 (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
323 #else /* !XFS_BIG_BLKNOS */
324 if (isnullstartblock(startblock)) {
326 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
327 ((xfs_bmbt_rec_base_t)startoff << 9) |
328 (xfs_bmbt_rec_base_t)xfs_mask64lo(9));
329 r->l1 = cpu_to_be64(xfs_mask64hi(11) |
330 ((xfs_bmbt_rec_base_t)startblock << 21) |
331 ((xfs_bmbt_rec_base_t)blockcount &
332 (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
335 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
336 ((xfs_bmbt_rec_base_t)startoff << 9));
338 ((xfs_bmbt_rec_base_t)startblock << 21) |
339 ((xfs_bmbt_rec_base_t)blockcount &
340 (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
342 #endif /* XFS_BIG_BLKNOS */
346 * Set all the fields in a bmap extent record from the uncompressed form.
349 xfs_bmbt_disk_set_all(
353 xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock,
354 s->br_blockcount, s->br_state);
358 * Set the blockcount field in a bmap extent record.
361 xfs_bmbt_set_blockcount(
362 xfs_bmbt_rec_host_t *r,
365 ASSERT((v & xfs_mask64hi(43)) == 0);
366 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) |
367 (xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21));
371 * Set the startblock field in a bmap extent record.
374 xfs_bmbt_set_startblock(
375 xfs_bmbt_rec_host_t *r,
379 ASSERT((v & xfs_mask64hi(12)) == 0);
380 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) |
381 (xfs_bmbt_rec_base_t)(v >> 43);
382 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) |
383 (xfs_bmbt_rec_base_t)(v << 21);
384 #else /* !XFS_BIG_BLKNOS */
385 if (isnullstartblock(v)) {
386 r->l0 |= (xfs_bmbt_rec_base_t)xfs_mask64lo(9);
387 r->l1 = (xfs_bmbt_rec_base_t)xfs_mask64hi(11) |
388 ((xfs_bmbt_rec_base_t)v << 21) |
389 (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
391 r->l0 &= ~(xfs_bmbt_rec_base_t)xfs_mask64lo(9);
392 r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
393 (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21));
395 #endif /* XFS_BIG_BLKNOS */
399 * Set the startoff field in a bmap extent record.
402 xfs_bmbt_set_startoff(
403 xfs_bmbt_rec_host_t *r,
406 ASSERT((v & xfs_mask64hi(9)) == 0);
407 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) |
408 ((xfs_bmbt_rec_base_t)v << 9) |
409 (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9));
413 * Set the extent state field in a bmap extent record.
417 xfs_bmbt_rec_host_t *r,
420 ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
421 if (v == XFS_EXT_NORM)
422 r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN);
424 r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN);
428 * Convert in-memory form of btree root to on-disk form.
432 struct xfs_mount *mp,
433 struct xfs_btree_block *rblock,
435 xfs_bmdr_block_t *dblock,
444 ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC);
445 ASSERT(be64_to_cpu(rblock->bb_u.l.bb_leftsib) == NULLDFSBNO);
446 ASSERT(be64_to_cpu(rblock->bb_u.l.bb_rightsib) == NULLDFSBNO);
447 ASSERT(be16_to_cpu(rblock->bb_level) > 0);
448 dblock->bb_level = rblock->bb_level;
449 dblock->bb_numrecs = rblock->bb_numrecs;
450 dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0);
451 fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
452 tkp = XFS_BMDR_KEY_ADDR(dblock, 1);
453 fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
454 tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
455 dmxr = be16_to_cpu(dblock->bb_numrecs);
456 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
457 memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
461 * Check extent records, which have just been read, for
462 * any bit in the extent flag field. ASSERT on debug
463 * kernels, as this condition should not occur.
464 * Return an error condition (1) if any flags found,
465 * otherwise return 0.
469 xfs_check_nostate_extents(
474 for (; num > 0; num--, idx++) {
475 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
477 (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
486 STATIC struct xfs_btree_cur *
488 struct xfs_btree_cur *cur)
490 struct xfs_btree_cur *new;
492 new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp,
493 cur->bc_private.b.ip, cur->bc_private.b.whichfork);
496 * Copy the firstblock, flist, and flags values,
497 * since init cursor doesn't get them.
499 new->bc_private.b.firstblock = cur->bc_private.b.firstblock;
500 new->bc_private.b.flist = cur->bc_private.b.flist;
501 new->bc_private.b.flags = cur->bc_private.b.flags;
507 xfs_bmbt_update_cursor(
508 struct xfs_btree_cur *src,
509 struct xfs_btree_cur *dst)
511 ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) ||
512 (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME));
513 ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist);
515 dst->bc_private.b.allocated += src->bc_private.b.allocated;
516 dst->bc_private.b.firstblock = src->bc_private.b.firstblock;
518 src->bc_private.b.allocated = 0;
522 xfs_bmbt_alloc_block(
523 struct xfs_btree_cur *cur,
524 union xfs_btree_ptr *start,
525 union xfs_btree_ptr *new,
529 xfs_alloc_arg_t args; /* block allocation args */
530 int error; /* error return value */
532 memset(&args, 0, sizeof(args));
533 args.tp = cur->bc_tp;
534 args.mp = cur->bc_mp;
535 args.fsbno = cur->bc_private.b.firstblock;
536 args.firstblock = args.fsbno;
538 if (args.fsbno == NULLFSBLOCK) {
539 args.fsbno = be64_to_cpu(start->l);
540 args.type = XFS_ALLOCTYPE_START_BNO;
542 * Make sure there is sufficient room left in the AG to
543 * complete a full tree split for an extent insert. If
544 * we are converting the middle part of an extent then
545 * we may need space for two tree splits.
547 * We are relying on the caller to make the correct block
548 * reservation for this operation to succeed. If the
549 * reservation amount is insufficient then we may fail a
550 * block allocation here and corrupt the filesystem.
552 args.minleft = xfs_trans_get_block_res(args.tp);
553 } else if (cur->bc_private.b.flist->xbf_low) {
554 args.type = XFS_ALLOCTYPE_START_BNO;
556 args.type = XFS_ALLOCTYPE_NEAR_BNO;
559 args.minlen = args.maxlen = args.prod = 1;
560 args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
561 if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
562 error = XFS_ERROR(ENOSPC);
565 error = xfs_alloc_vextent(&args);
569 if (args.fsbno == NULLFSBLOCK && args.minleft) {
571 * Could not find an AG with enough free space to satisfy
572 * a full btree split. Try again without minleft and if
573 * successful activate the lowspace algorithm.
576 args.type = XFS_ALLOCTYPE_FIRST_AG;
578 error = xfs_alloc_vextent(&args);
581 cur->bc_private.b.flist->xbf_low = 1;
583 if (args.fsbno == NULLFSBLOCK) {
584 XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
588 ASSERT(args.len == 1);
589 cur->bc_private.b.firstblock = args.fsbno;
590 cur->bc_private.b.allocated++;
591 cur->bc_private.b.ip->i_d.di_nblocks++;
592 xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
593 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
594 XFS_TRANS_DQ_BCOUNT, 1L);
596 new->l = cpu_to_be64(args.fsbno);
598 XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
603 XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
609 struct xfs_btree_cur *cur,
612 struct xfs_mount *mp = cur->bc_mp;
613 struct xfs_inode *ip = cur->bc_private.b.ip;
614 struct xfs_trans *tp = cur->bc_tp;
615 xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
617 xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp);
618 ip->i_d.di_nblocks--;
620 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
621 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
622 xfs_trans_binval(tp, bp);
627 xfs_bmbt_get_minrecs(
628 struct xfs_btree_cur *cur,
631 if (level == cur->bc_nlevels - 1) {
632 struct xfs_ifork *ifp;
634 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
635 cur->bc_private.b.whichfork);
637 return xfs_bmbt_maxrecs(cur->bc_mp,
638 ifp->if_broot_bytes, level == 0) / 2;
641 return cur->bc_mp->m_bmap_dmnr[level != 0];
645 xfs_bmbt_get_maxrecs(
646 struct xfs_btree_cur *cur,
649 if (level == cur->bc_nlevels - 1) {
650 struct xfs_ifork *ifp;
652 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
653 cur->bc_private.b.whichfork);
655 return xfs_bmbt_maxrecs(cur->bc_mp,
656 ifp->if_broot_bytes, level == 0);
659 return cur->bc_mp->m_bmap_dmxr[level != 0];
664 * Get the maximum records we could store in the on-disk format.
666 * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but
667 * for the root node this checks the available space in the dinode fork
668 * so that we can resize the in-memory buffer to match it. After a
669 * resize to the maximum size this function returns the same value
670 * as xfs_bmbt_get_maxrecs for the root node, too.
673 xfs_bmbt_get_dmaxrecs(
674 struct xfs_btree_cur *cur,
677 if (level != cur->bc_nlevels - 1)
678 return cur->bc_mp->m_bmap_dmxr[level != 0];
679 return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize,
684 xfs_bmbt_init_key_from_rec(
685 union xfs_btree_key *key,
686 union xfs_btree_rec *rec)
688 key->bmbt.br_startoff =
689 cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt));
693 xfs_bmbt_init_rec_from_key(
694 union xfs_btree_key *key,
695 union xfs_btree_rec *rec)
697 ASSERT(key->bmbt.br_startoff != 0);
699 xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff),
704 xfs_bmbt_init_rec_from_cur(
705 struct xfs_btree_cur *cur,
706 union xfs_btree_rec *rec)
708 xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b);
712 xfs_bmbt_init_ptr_from_cur(
713 struct xfs_btree_cur *cur,
714 union xfs_btree_ptr *ptr)
721 struct xfs_btree_cur *cur,
722 union xfs_btree_key *key)
724 return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) -
725 cur->bc_rec.b.br_startoff;
730 xfs_bmbt_keys_inorder(
731 struct xfs_btree_cur *cur,
732 union xfs_btree_key *k1,
733 union xfs_btree_key *k2)
735 return be64_to_cpu(k1->bmbt.br_startoff) <
736 be64_to_cpu(k2->bmbt.br_startoff);
740 xfs_bmbt_recs_inorder(
741 struct xfs_btree_cur *cur,
742 union xfs_btree_rec *r1,
743 union xfs_btree_rec *r2)
745 return xfs_bmbt_disk_get_startoff(&r1->bmbt) +
746 xfs_bmbt_disk_get_blockcount(&r1->bmbt) <=
747 xfs_bmbt_disk_get_startoff(&r2->bmbt);
751 #ifdef XFS_BTREE_TRACE
752 ktrace_t *xfs_bmbt_trace_buf;
755 xfs_bmbt_trace_enter(
756 struct xfs_btree_cur *cur,
773 struct xfs_inode *ip = cur->bc_private.b.ip;
774 int whichfork = cur->bc_private.b.whichfork;
776 ktrace_enter(xfs_bmbt_trace_buf,
777 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
778 (void *)func, (void *)s, (void *)ip, (void *)cur,
779 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
780 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
781 (void *)a8, (void *)a9, (void *)a10);
782 ktrace_enter(ip->i_btrace,
783 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
784 (void *)func, (void *)s, (void *)ip, (void *)cur,
785 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
786 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
787 (void *)a8, (void *)a9, (void *)a10);
791 xfs_bmbt_trace_cursor(
792 struct xfs_btree_cur *cur,
797 struct xfs_bmbt_rec_host r;
799 xfs_bmbt_set_all(&r, &cur->bc_rec.b);
801 *s0 = (cur->bc_nlevels << 24) |
802 (cur->bc_private.b.flags << 16) |
803 cur->bc_private.b.allocated;
810 struct xfs_btree_cur *cur,
811 union xfs_btree_key *key,
815 *l0 = be64_to_cpu(key->bmbt.br_startoff);
820 xfs_bmbt_trace_record(
821 struct xfs_btree_cur *cur,
822 union xfs_btree_rec *rec,
827 struct xfs_bmbt_irec irec;
829 xfs_bmbt_disk_get_all(&rec->bmbt, &irec);
830 *l0 = irec.br_startoff;
831 *l1 = irec.br_startblock;
832 *l2 = irec.br_blockcount;
834 #endif /* XFS_BTREE_TRACE */
836 static const struct xfs_btree_ops xfs_bmbt_ops = {
837 .rec_len = sizeof(xfs_bmbt_rec_t),
838 .key_len = sizeof(xfs_bmbt_key_t),
840 .dup_cursor = xfs_bmbt_dup_cursor,
841 .update_cursor = xfs_bmbt_update_cursor,
842 .alloc_block = xfs_bmbt_alloc_block,
843 .free_block = xfs_bmbt_free_block,
844 .get_maxrecs = xfs_bmbt_get_maxrecs,
845 .get_minrecs = xfs_bmbt_get_minrecs,
846 .get_dmaxrecs = xfs_bmbt_get_dmaxrecs,
847 .init_key_from_rec = xfs_bmbt_init_key_from_rec,
848 .init_rec_from_key = xfs_bmbt_init_rec_from_key,
849 .init_rec_from_cur = xfs_bmbt_init_rec_from_cur,
850 .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur,
851 .key_diff = xfs_bmbt_key_diff,
854 .keys_inorder = xfs_bmbt_keys_inorder,
855 .recs_inorder = xfs_bmbt_recs_inorder,
858 #ifdef XFS_BTREE_TRACE
859 .trace_enter = xfs_bmbt_trace_enter,
860 .trace_cursor = xfs_bmbt_trace_cursor,
861 .trace_key = xfs_bmbt_trace_key,
862 .trace_record = xfs_bmbt_trace_record,
867 * Allocate a new bmap btree cursor.
869 struct xfs_btree_cur * /* new bmap btree cursor */
870 xfs_bmbt_init_cursor(
871 struct xfs_mount *mp, /* file system mount point */
872 struct xfs_trans *tp, /* transaction pointer */
873 struct xfs_inode *ip, /* inode owning the btree */
874 int whichfork) /* data or attr fork */
876 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
877 struct xfs_btree_cur *cur;
879 cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
883 cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1;
884 cur->bc_btnum = XFS_BTNUM_BMAP;
885 cur->bc_blocklog = mp->m_sb.sb_blocklog;
887 cur->bc_ops = &xfs_bmbt_ops;
888 cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE;
890 cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork);
891 cur->bc_private.b.ip = ip;
892 cur->bc_private.b.firstblock = NULLFSBLOCK;
893 cur->bc_private.b.flist = NULL;
894 cur->bc_private.b.allocated = 0;
895 cur->bc_private.b.flags = 0;
896 cur->bc_private.b.whichfork = whichfork;
902 * Calculate number of records in a bmap btree block.
906 struct xfs_mount *mp,
910 blocklen -= XFS_BMBT_BLOCK_LEN(mp);
913 return blocklen / sizeof(xfs_bmbt_rec_t);
914 return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t));
918 * Calculate number of records in a bmap btree inode root.
922 struct xfs_mount *mp,
926 blocklen -= sizeof(xfs_bmdr_block_t);
929 return blocklen / sizeof(xfs_bmdr_rec_t);
930 return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t));