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(be64_to_cpu(r->l0), be64_to_cpu(r->l1), s);
215 * Extract the blockcount field from an on disk bmap extent record.
218 xfs_bmbt_disk_get_blockcount(
221 return (xfs_filblks_t)(be64_to_cpu(r->l1) & XFS_MASK64LO(21));
225 * Extract the startoff field from a disk format bmap extent record.
228 xfs_bmbt_disk_get_startoff(
231 return ((xfs_fileoff_t)be64_to_cpu(r->l0) &
232 XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9;
237 * Set all the fields in a bmap extent record from the arguments.
241 xfs_bmbt_rec_host_t *r,
242 xfs_fileoff_t startoff,
243 xfs_fsblock_t startblock,
244 xfs_filblks_t blockcount,
247 int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
249 ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
250 ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
251 ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
254 ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
256 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
257 ((xfs_bmbt_rec_base_t)startoff << 9) |
258 ((xfs_bmbt_rec_base_t)startblock >> 43);
259 r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
260 ((xfs_bmbt_rec_base_t)blockcount &
261 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
262 #else /* !XFS_BIG_BLKNOS */
263 if (ISNULLSTARTBLOCK(startblock)) {
264 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
265 ((xfs_bmbt_rec_base_t)startoff << 9) |
266 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
267 r->l1 = XFS_MASK64HI(11) |
268 ((xfs_bmbt_rec_base_t)startblock << 21) |
269 ((xfs_bmbt_rec_base_t)blockcount &
270 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
272 r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) |
273 ((xfs_bmbt_rec_base_t)startoff << 9);
274 r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) |
275 ((xfs_bmbt_rec_base_t)blockcount &
276 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
278 #endif /* XFS_BIG_BLKNOS */
282 * Set all the fields in a bmap extent record from the uncompressed form.
286 xfs_bmbt_rec_host_t *r,
289 xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock,
290 s->br_blockcount, s->br_state);
295 * Set all the fields in a disk format bmap extent record from the arguments.
298 xfs_bmbt_disk_set_allf(
300 xfs_fileoff_t startoff,
301 xfs_fsblock_t startblock,
302 xfs_filblks_t blockcount,
305 int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1;
307 ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN);
308 ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0);
309 ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0);
312 ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0);
315 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
316 ((xfs_bmbt_rec_base_t)startoff << 9) |
317 ((xfs_bmbt_rec_base_t)startblock >> 43));
319 ((xfs_bmbt_rec_base_t)startblock << 21) |
320 ((xfs_bmbt_rec_base_t)blockcount &
321 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
322 #else /* !XFS_BIG_BLKNOS */
323 if (ISNULLSTARTBLOCK(startblock)) {
325 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
326 ((xfs_bmbt_rec_base_t)startoff << 9) |
327 (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
328 r->l1 = cpu_to_be64(XFS_MASK64HI(11) |
329 ((xfs_bmbt_rec_base_t)startblock << 21) |
330 ((xfs_bmbt_rec_base_t)blockcount &
331 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
334 ((xfs_bmbt_rec_base_t)extent_flag << 63) |
335 ((xfs_bmbt_rec_base_t)startoff << 9));
337 ((xfs_bmbt_rec_base_t)startblock << 21) |
338 ((xfs_bmbt_rec_base_t)blockcount &
339 (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)));
341 #endif /* XFS_BIG_BLKNOS */
345 * Set all the fields in a bmap extent record from the uncompressed form.
348 xfs_bmbt_disk_set_all(
352 xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock,
353 s->br_blockcount, s->br_state);
357 * Set the blockcount field in a bmap extent record.
360 xfs_bmbt_set_blockcount(
361 xfs_bmbt_rec_host_t *r,
364 ASSERT((v & XFS_MASK64HI(43)) == 0);
365 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) |
366 (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21));
370 * Set the startblock field in a bmap extent record.
373 xfs_bmbt_set_startblock(
374 xfs_bmbt_rec_host_t *r,
378 ASSERT((v & XFS_MASK64HI(12)) == 0);
379 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) |
380 (xfs_bmbt_rec_base_t)(v >> 43);
381 r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) |
382 (xfs_bmbt_rec_base_t)(v << 21);
383 #else /* !XFS_BIG_BLKNOS */
384 if (ISNULLSTARTBLOCK(v)) {
385 r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
386 r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) |
387 ((xfs_bmbt_rec_base_t)v << 21) |
388 (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
390 r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9);
391 r->l1 = ((xfs_bmbt_rec_base_t)v << 21) |
392 (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21));
394 #endif /* XFS_BIG_BLKNOS */
398 * Set the startoff field in a bmap extent record.
401 xfs_bmbt_set_startoff(
402 xfs_bmbt_rec_host_t *r,
405 ASSERT((v & XFS_MASK64HI(9)) == 0);
406 r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) |
407 ((xfs_bmbt_rec_base_t)v << 9) |
408 (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9));
412 * Set the extent state field in a bmap extent record.
416 xfs_bmbt_rec_host_t *r,
419 ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN);
420 if (v == XFS_EXT_NORM)
421 r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN);
423 r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN);
427 * Convert in-memory form of btree root to on-disk form.
431 struct xfs_mount *mp,
432 struct xfs_btree_block *rblock,
434 xfs_bmdr_block_t *dblock,
443 ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC);
444 ASSERT(be64_to_cpu(rblock->bb_u.l.bb_leftsib) == NULLDFSBNO);
445 ASSERT(be64_to_cpu(rblock->bb_u.l.bb_rightsib) == NULLDFSBNO);
446 ASSERT(be16_to_cpu(rblock->bb_level) > 0);
447 dblock->bb_level = rblock->bb_level;
448 dblock->bb_numrecs = rblock->bb_numrecs;
449 dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0);
450 fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1);
451 tkp = XFS_BMDR_KEY_ADDR(dblock, 1);
452 fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen);
453 tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr);
454 dmxr = be16_to_cpu(dblock->bb_numrecs);
455 memcpy(tkp, fkp, sizeof(*fkp) * dmxr);
456 memcpy(tpp, fpp, sizeof(*fpp) * dmxr);
460 * Check extent records, which have just been read, for
461 * any bit in the extent flag field. ASSERT on debug
462 * kernels, as this condition should not occur.
463 * Return an error condition (1) if any flags found,
464 * otherwise return 0.
468 xfs_check_nostate_extents(
473 for (; num > 0; num--, idx++) {
474 xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
476 (64 - BMBT_EXNTFLAG_BITLEN)) != 0) {
485 STATIC struct xfs_btree_cur *
487 struct xfs_btree_cur *cur)
489 struct xfs_btree_cur *new;
491 new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp,
492 cur->bc_private.b.ip, cur->bc_private.b.whichfork);
495 * Copy the firstblock, flist, and flags values,
496 * since init cursor doesn't get them.
498 new->bc_private.b.firstblock = cur->bc_private.b.firstblock;
499 new->bc_private.b.flist = cur->bc_private.b.flist;
500 new->bc_private.b.flags = cur->bc_private.b.flags;
506 xfs_bmbt_update_cursor(
507 struct xfs_btree_cur *src,
508 struct xfs_btree_cur *dst)
510 ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) ||
511 (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME));
512 ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist);
514 dst->bc_private.b.allocated += src->bc_private.b.allocated;
515 dst->bc_private.b.firstblock = src->bc_private.b.firstblock;
517 src->bc_private.b.allocated = 0;
521 xfs_bmbt_alloc_block(
522 struct xfs_btree_cur *cur,
523 union xfs_btree_ptr *start,
524 union xfs_btree_ptr *new,
528 xfs_alloc_arg_t args; /* block allocation args */
529 int error; /* error return value */
531 memset(&args, 0, sizeof(args));
532 args.tp = cur->bc_tp;
533 args.mp = cur->bc_mp;
534 args.fsbno = cur->bc_private.b.firstblock;
535 args.firstblock = args.fsbno;
537 if (args.fsbno == NULLFSBLOCK) {
538 args.fsbno = be64_to_cpu(start->l);
539 args.type = XFS_ALLOCTYPE_START_BNO;
541 * Make sure there is sufficient room left in the AG to
542 * complete a full tree split for an extent insert. If
543 * we are converting the middle part of an extent then
544 * we may need space for two tree splits.
546 * We are relying on the caller to make the correct block
547 * reservation for this operation to succeed. If the
548 * reservation amount is insufficient then we may fail a
549 * block allocation here and corrupt the filesystem.
551 args.minleft = xfs_trans_get_block_res(args.tp);
552 } else if (cur->bc_private.b.flist->xbf_low) {
553 args.type = XFS_ALLOCTYPE_START_BNO;
555 args.type = XFS_ALLOCTYPE_NEAR_BNO;
558 args.minlen = args.maxlen = args.prod = 1;
559 args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL;
560 if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) {
561 error = XFS_ERROR(ENOSPC);
564 error = xfs_alloc_vextent(&args);
568 if (args.fsbno == NULLFSBLOCK && args.minleft) {
570 * Could not find an AG with enough free space to satisfy
571 * a full btree split. Try again without minleft and if
572 * successful activate the lowspace algorithm.
575 args.type = XFS_ALLOCTYPE_FIRST_AG;
577 error = xfs_alloc_vextent(&args);
580 cur->bc_private.b.flist->xbf_low = 1;
582 if (args.fsbno == NULLFSBLOCK) {
583 XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
587 ASSERT(args.len == 1);
588 cur->bc_private.b.firstblock = args.fsbno;
589 cur->bc_private.b.allocated++;
590 cur->bc_private.b.ip->i_d.di_nblocks++;
591 xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE);
592 XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip,
593 XFS_TRANS_DQ_BCOUNT, 1L);
595 new->l = cpu_to_be64(args.fsbno);
597 XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT);
602 XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR);
608 struct xfs_btree_cur *cur,
611 struct xfs_mount *mp = cur->bc_mp;
612 struct xfs_inode *ip = cur->bc_private.b.ip;
613 struct xfs_trans *tp = cur->bc_tp;
614 xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
616 xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp);
617 ip->i_d.di_nblocks--;
619 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
620 XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
621 xfs_trans_binval(tp, bp);
626 xfs_bmbt_get_minrecs(
627 struct xfs_btree_cur *cur,
630 if (level == cur->bc_nlevels - 1) {
631 struct xfs_ifork *ifp;
633 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
634 cur->bc_private.b.whichfork);
636 return xfs_bmbt_maxrecs(cur->bc_mp,
637 ifp->if_broot_bytes, level == 0) / 2;
640 return cur->bc_mp->m_bmap_dmnr[level != 0];
644 xfs_bmbt_get_maxrecs(
645 struct xfs_btree_cur *cur,
648 if (level == cur->bc_nlevels - 1) {
649 struct xfs_ifork *ifp;
651 ifp = XFS_IFORK_PTR(cur->bc_private.b.ip,
652 cur->bc_private.b.whichfork);
654 return xfs_bmbt_maxrecs(cur->bc_mp,
655 ifp->if_broot_bytes, level == 0);
658 return cur->bc_mp->m_bmap_dmxr[level != 0];
663 * Get the maximum records we could store in the on-disk format.
665 * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but
666 * for the root node this checks the available space in the dinode fork
667 * so that we can resize the in-memory buffer to match it. After a
668 * resize to the maximum size this function returns the same value
669 * as xfs_bmbt_get_maxrecs for the root node, too.
672 xfs_bmbt_get_dmaxrecs(
673 struct xfs_btree_cur *cur,
676 if (level != cur->bc_nlevels - 1)
677 return cur->bc_mp->m_bmap_dmxr[level != 0];
678 return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize,
683 xfs_bmbt_init_key_from_rec(
684 union xfs_btree_key *key,
685 union xfs_btree_rec *rec)
687 key->bmbt.br_startoff =
688 cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt));
692 xfs_bmbt_init_rec_from_key(
693 union xfs_btree_key *key,
694 union xfs_btree_rec *rec)
696 ASSERT(key->bmbt.br_startoff != 0);
698 xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff),
703 xfs_bmbt_init_rec_from_cur(
704 struct xfs_btree_cur *cur,
705 union xfs_btree_rec *rec)
707 xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b);
711 xfs_bmbt_init_ptr_from_cur(
712 struct xfs_btree_cur *cur,
713 union xfs_btree_ptr *ptr)
720 struct xfs_btree_cur *cur,
721 union xfs_btree_key *key)
723 return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) -
724 cur->bc_rec.b.br_startoff;
729 xfs_bmbt_keys_inorder(
730 struct xfs_btree_cur *cur,
731 union xfs_btree_key *k1,
732 union xfs_btree_key *k2)
734 return be64_to_cpu(k1->bmbt.br_startoff) <
735 be64_to_cpu(k2->bmbt.br_startoff);
739 xfs_bmbt_recs_inorder(
740 struct xfs_btree_cur *cur,
741 union xfs_btree_rec *r1,
742 union xfs_btree_rec *r2)
744 return xfs_bmbt_disk_get_startoff(&r1->bmbt) +
745 xfs_bmbt_disk_get_blockcount(&r1->bmbt) <=
746 xfs_bmbt_disk_get_startoff(&r2->bmbt);
750 #ifdef XFS_BTREE_TRACE
751 ktrace_t *xfs_bmbt_trace_buf;
754 xfs_bmbt_trace_enter(
755 struct xfs_btree_cur *cur,
772 struct xfs_inode *ip = cur->bc_private.b.ip;
773 int whichfork = cur->bc_private.b.whichfork;
775 ktrace_enter(xfs_bmbt_trace_buf,
776 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
777 (void *)func, (void *)s, (void *)ip, (void *)cur,
778 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
779 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
780 (void *)a8, (void *)a9, (void *)a10);
781 ktrace_enter(ip->i_btrace,
782 (void *)((__psint_t)type | (whichfork << 8) | (line << 16)),
783 (void *)func, (void *)s, (void *)ip, (void *)cur,
784 (void *)a0, (void *)a1, (void *)a2, (void *)a3,
785 (void *)a4, (void *)a5, (void *)a6, (void *)a7,
786 (void *)a8, (void *)a9, (void *)a10);
790 xfs_bmbt_trace_cursor(
791 struct xfs_btree_cur *cur,
796 struct xfs_bmbt_rec_host r;
798 xfs_bmbt_set_all(&r, &cur->bc_rec.b);
800 *s0 = (cur->bc_nlevels << 24) |
801 (cur->bc_private.b.flags << 16) |
802 cur->bc_private.b.allocated;
809 struct xfs_btree_cur *cur,
810 union xfs_btree_key *key,
814 *l0 = be64_to_cpu(key->bmbt.br_startoff);
819 xfs_bmbt_trace_record(
820 struct xfs_btree_cur *cur,
821 union xfs_btree_rec *rec,
826 struct xfs_bmbt_irec irec;
828 xfs_bmbt_disk_get_all(&rec->bmbt, &irec);
829 *l0 = irec.br_startoff;
830 *l1 = irec.br_startblock;
831 *l2 = irec.br_blockcount;
833 #endif /* XFS_BTREE_TRACE */
835 static const struct xfs_btree_ops xfs_bmbt_ops = {
836 .rec_len = sizeof(xfs_bmbt_rec_t),
837 .key_len = sizeof(xfs_bmbt_key_t),
839 .dup_cursor = xfs_bmbt_dup_cursor,
840 .update_cursor = xfs_bmbt_update_cursor,
841 .alloc_block = xfs_bmbt_alloc_block,
842 .free_block = xfs_bmbt_free_block,
843 .get_maxrecs = xfs_bmbt_get_maxrecs,
844 .get_minrecs = xfs_bmbt_get_minrecs,
845 .get_dmaxrecs = xfs_bmbt_get_dmaxrecs,
846 .init_key_from_rec = xfs_bmbt_init_key_from_rec,
847 .init_rec_from_key = xfs_bmbt_init_rec_from_key,
848 .init_rec_from_cur = xfs_bmbt_init_rec_from_cur,
849 .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur,
850 .key_diff = xfs_bmbt_key_diff,
853 .keys_inorder = xfs_bmbt_keys_inorder,
854 .recs_inorder = xfs_bmbt_recs_inorder,
857 #ifdef XFS_BTREE_TRACE
858 .trace_enter = xfs_bmbt_trace_enter,
859 .trace_cursor = xfs_bmbt_trace_cursor,
860 .trace_key = xfs_bmbt_trace_key,
861 .trace_record = xfs_bmbt_trace_record,
866 * Allocate a new bmap btree cursor.
868 struct xfs_btree_cur * /* new bmap btree cursor */
869 xfs_bmbt_init_cursor(
870 struct xfs_mount *mp, /* file system mount point */
871 struct xfs_trans *tp, /* transaction pointer */
872 struct xfs_inode *ip, /* inode owning the btree */
873 int whichfork) /* data or attr fork */
875 struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
876 struct xfs_btree_cur *cur;
878 cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP);
882 cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1;
883 cur->bc_btnum = XFS_BTNUM_BMAP;
884 cur->bc_blocklog = mp->m_sb.sb_blocklog;
886 cur->bc_ops = &xfs_bmbt_ops;
887 cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE;
889 cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork);
890 cur->bc_private.b.ip = ip;
891 cur->bc_private.b.firstblock = NULLFSBLOCK;
892 cur->bc_private.b.flist = NULL;
893 cur->bc_private.b.allocated = 0;
894 cur->bc_private.b.flags = 0;
895 cur->bc_private.b.whichfork = whichfork;
901 * Calculate number of records in a bmap btree block.
905 struct xfs_mount *mp,
909 blocklen -= XFS_BMBT_BLOCK_LEN(mp);
912 return blocklen / sizeof(xfs_bmbt_rec_t);
913 return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t));
917 * Calculate number of records in a bmap btree inode root.
921 struct xfs_mount *mp,
925 blocklen -= sizeof(xfs_bmdr_block_t);
928 return blocklen / sizeof(xfs_bmdr_rec_t);
929 return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t));