2 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
3 * Copyright (c) 2013 Red Hat, Inc.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it would be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "xfs_shared.h"
22 #include "xfs_format.h"
23 #include "xfs_log_format.h"
24 #include "xfs_trans_resv.h"
27 #include "xfs_mount.h"
28 #include "xfs_da_format.h"
29 #include "xfs_da_btree.h"
30 #include "xfs_inode.h"
32 #include "xfs_dir2_priv.h"
35 * Shortform directory ops
39 struct xfs_dir2_sf_hdr *hdr,
42 int count = sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
44 count += len; /* name */
45 count += hdr->i8count ? sizeof(xfs_dir2_ino8_t) :
46 sizeof(xfs_dir2_ino4_t); /* ino # */
52 struct xfs_dir2_sf_hdr *hdr,
55 return xfs_dir2_sf_entsize(hdr, len) + sizeof(__uint8_t);
58 static struct xfs_dir2_sf_entry *
59 xfs_dir2_sf_nextentry(
60 struct xfs_dir2_sf_hdr *hdr,
61 struct xfs_dir2_sf_entry *sfep)
63 return (struct xfs_dir2_sf_entry *)
64 ((char *)sfep + xfs_dir2_sf_entsize(hdr, sfep->namelen));
67 static struct xfs_dir2_sf_entry *
68 xfs_dir3_sf_nextentry(
69 struct xfs_dir2_sf_hdr *hdr,
70 struct xfs_dir2_sf_entry *sfep)
72 return (struct xfs_dir2_sf_entry *)
73 ((char *)sfep + xfs_dir3_sf_entsize(hdr, sfep->namelen));
78 * For filetype enabled shortform directories, the file type field is stored at
79 * the end of the name. Because it's only a single byte, endian conversion is
80 * not necessary. For non-filetype enable directories, the type is always
81 * unknown and we never store the value.
84 xfs_dir2_sfe_get_ftype(
85 struct xfs_dir2_sf_entry *sfep)
87 return XFS_DIR3_FT_UNKNOWN;
91 xfs_dir2_sfe_put_ftype(
92 struct xfs_dir2_sf_entry *sfep,
95 ASSERT(ftype < XFS_DIR3_FT_MAX);
99 xfs_dir3_sfe_get_ftype(
100 struct xfs_dir2_sf_entry *sfep)
104 ftype = sfep->name[sfep->namelen];
105 if (ftype >= XFS_DIR3_FT_MAX)
106 return XFS_DIR3_FT_UNKNOWN;
111 xfs_dir3_sfe_put_ftype(
112 struct xfs_dir2_sf_entry *sfep,
115 ASSERT(ftype < XFS_DIR3_FT_MAX);
117 sfep->name[sfep->namelen] = ftype;
121 * Inode numbers in short-form directories can come in two versions,
122 * either 4 bytes or 8 bytes wide. These helpers deal with the
123 * two forms transparently by looking at the headers i8count field.
125 * For 64-bit inode number the most significant byte must be zero.
129 struct xfs_dir2_sf_hdr *hdr,
130 xfs_dir2_inou_t *from)
133 return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL;
135 return get_unaligned_be32(&from->i4.i);
140 struct xfs_dir2_sf_hdr *hdr,
144 ASSERT((ino & 0xff00000000000000ULL) == 0);
147 put_unaligned_be64(ino, &to->i8.i);
149 put_unaligned_be32(ino, &to->i4.i);
153 xfs_dir2_sf_get_parent_ino(
154 struct xfs_dir2_sf_hdr *hdr)
156 return xfs_dir2_sf_get_ino(hdr, &hdr->parent);
160 xfs_dir2_sf_put_parent_ino(
161 struct xfs_dir2_sf_hdr *hdr,
164 xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino);
168 * In short-form directory entries the inode numbers are stored at variable
169 * offset behind the entry name. If the entry stores a filetype value, then it
170 * sits between the name and the inode number. Hence the inode numbers may only
171 * be accessed through the helpers below.
174 xfs_dir2_sfe_get_ino(
175 struct xfs_dir2_sf_hdr *hdr,
176 struct xfs_dir2_sf_entry *sfep)
178 return xfs_dir2_sf_get_ino(hdr,
179 (xfs_dir2_inou_t *)&sfep->name[sfep->namelen]);
183 xfs_dir2_sfe_put_ino(
184 struct xfs_dir2_sf_hdr *hdr,
185 struct xfs_dir2_sf_entry *sfep,
188 xfs_dir2_sf_put_ino(hdr,
189 (xfs_dir2_inou_t *)&sfep->name[sfep->namelen], ino);
193 xfs_dir3_sfe_get_ino(
194 struct xfs_dir2_sf_hdr *hdr,
195 struct xfs_dir2_sf_entry *sfep)
197 return xfs_dir2_sf_get_ino(hdr,
198 (xfs_dir2_inou_t *)&sfep->name[sfep->namelen + 1]);
202 xfs_dir3_sfe_put_ino(
203 struct xfs_dir2_sf_hdr *hdr,
204 struct xfs_dir2_sf_entry *sfep,
207 xfs_dir2_sf_put_ino(hdr,
208 (xfs_dir2_inou_t *)&sfep->name[sfep->namelen + 1], ino);
213 * Directory data block operations
217 * For special situations, the dirent size ends up fixed because we always know
218 * what the size of the entry is. That's true for the "." and "..", and
219 * therefore we know that they are a fixed size and hence their offsets are
220 * constant, as is the first entry.
222 * Hence, this calculation is written as a macro to be able to be calculated at
223 * compile time and so certain offsets can be calculated directly in the
224 * structure initaliser via the macro. There are two macros - one for dirents
225 * with ftype and without so there are no unresolvable conditionals in the
226 * calculations. We also use round_up() as XFS_DIR2_DATA_ALIGN is always a power
227 * of 2 and the compiler doesn't reject it (unlike roundup()).
229 #define XFS_DIR2_DATA_ENTSIZE(n) \
230 round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \
231 sizeof(xfs_dir2_data_off_t)), XFS_DIR2_DATA_ALIGN)
233 #define XFS_DIR3_DATA_ENTSIZE(n) \
234 round_up((offsetof(struct xfs_dir2_data_entry, name[0]) + (n) + \
235 sizeof(xfs_dir2_data_off_t) + sizeof(__uint8_t)), \
239 xfs_dir2_data_entsize(
242 return XFS_DIR2_DATA_ENTSIZE(n);
246 xfs_dir3_data_entsize(
249 return XFS_DIR3_DATA_ENTSIZE(n);
253 xfs_dir2_data_get_ftype(
254 struct xfs_dir2_data_entry *dep)
256 return XFS_DIR3_FT_UNKNOWN;
260 xfs_dir2_data_put_ftype(
261 struct xfs_dir2_data_entry *dep,
264 ASSERT(ftype < XFS_DIR3_FT_MAX);
268 xfs_dir3_data_get_ftype(
269 struct xfs_dir2_data_entry *dep)
271 __uint8_t ftype = dep->name[dep->namelen];
273 ASSERT(ftype < XFS_DIR3_FT_MAX);
274 if (ftype >= XFS_DIR3_FT_MAX)
275 return XFS_DIR3_FT_UNKNOWN;
280 xfs_dir3_data_put_ftype(
281 struct xfs_dir2_data_entry *dep,
284 ASSERT(type < XFS_DIR3_FT_MAX);
285 ASSERT(dep->namelen != 0);
287 dep->name[dep->namelen] = type;
291 * Pointer to an entry's tag word.
294 xfs_dir2_data_entry_tag_p(
295 struct xfs_dir2_data_entry *dep)
297 return (__be16 *)((char *)dep +
298 xfs_dir2_data_entsize(dep->namelen) - sizeof(__be16));
302 xfs_dir3_data_entry_tag_p(
303 struct xfs_dir2_data_entry *dep)
305 return (__be16 *)((char *)dep +
306 xfs_dir3_data_entsize(dep->namelen) - sizeof(__be16));
310 * location of . and .. in data space (always block 0)
312 static struct xfs_dir2_data_entry *
313 xfs_dir2_data_dot_entry_p(
314 struct xfs_dir2_data_hdr *hdr)
316 return (struct xfs_dir2_data_entry *)
317 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
320 static struct xfs_dir2_data_entry *
321 xfs_dir2_data_dotdot_entry_p(
322 struct xfs_dir2_data_hdr *hdr)
324 return (struct xfs_dir2_data_entry *)
325 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
326 XFS_DIR2_DATA_ENTSIZE(1));
329 static struct xfs_dir2_data_entry *
330 xfs_dir2_data_first_entry_p(
331 struct xfs_dir2_data_hdr *hdr)
333 return (struct xfs_dir2_data_entry *)
334 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
335 XFS_DIR2_DATA_ENTSIZE(1) +
336 XFS_DIR2_DATA_ENTSIZE(2));
339 static struct xfs_dir2_data_entry *
340 xfs_dir2_ftype_data_dotdot_entry_p(
341 struct xfs_dir2_data_hdr *hdr)
343 return (struct xfs_dir2_data_entry *)
344 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
345 XFS_DIR3_DATA_ENTSIZE(1));
348 static struct xfs_dir2_data_entry *
349 xfs_dir2_ftype_data_first_entry_p(
350 struct xfs_dir2_data_hdr *hdr)
352 return (struct xfs_dir2_data_entry *)
353 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr) +
354 XFS_DIR3_DATA_ENTSIZE(1) +
355 XFS_DIR3_DATA_ENTSIZE(2));
358 static struct xfs_dir2_data_entry *
359 xfs_dir3_data_dot_entry_p(
360 struct xfs_dir2_data_hdr *hdr)
362 return (struct xfs_dir2_data_entry *)
363 ((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
366 static struct xfs_dir2_data_entry *
367 xfs_dir3_data_dotdot_entry_p(
368 struct xfs_dir2_data_hdr *hdr)
370 return (struct xfs_dir2_data_entry *)
371 ((char *)hdr + sizeof(struct xfs_dir3_data_hdr) +
372 XFS_DIR3_DATA_ENTSIZE(1));
375 static struct xfs_dir2_data_entry *
376 xfs_dir3_data_first_entry_p(
377 struct xfs_dir2_data_hdr *hdr)
379 return (struct xfs_dir2_data_entry *)
380 ((char *)hdr + sizeof(struct xfs_dir3_data_hdr) +
381 XFS_DIR3_DATA_ENTSIZE(1) +
382 XFS_DIR3_DATA_ENTSIZE(2));
385 static struct xfs_dir2_data_free *
386 xfs_dir2_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
388 return hdr->bestfree;
391 static struct xfs_dir2_data_free *
392 xfs_dir3_data_bestfree_p(struct xfs_dir2_data_hdr *hdr)
394 return ((struct xfs_dir3_data_hdr *)hdr)->best_free;
397 static struct xfs_dir2_data_entry *
398 xfs_dir2_data_entry_p(struct xfs_dir2_data_hdr *hdr)
400 return (struct xfs_dir2_data_entry *)
401 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
404 static struct xfs_dir2_data_unused *
405 xfs_dir2_data_unused_p(struct xfs_dir2_data_hdr *hdr)
407 return (struct xfs_dir2_data_unused *)
408 ((char *)hdr + sizeof(struct xfs_dir2_data_hdr));
411 static struct xfs_dir2_data_entry *
412 xfs_dir3_data_entry_p(struct xfs_dir2_data_hdr *hdr)
414 return (struct xfs_dir2_data_entry *)
415 ((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
418 static struct xfs_dir2_data_unused *
419 xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr)
421 return (struct xfs_dir2_data_unused *)
422 ((char *)hdr + sizeof(struct xfs_dir3_data_hdr));
427 * Directory Leaf block operations
430 xfs_dir2_max_leaf_ents(struct xfs_da_geometry *geo)
432 return (geo->blksize - sizeof(struct xfs_dir2_leaf_hdr)) /
433 (uint)sizeof(struct xfs_dir2_leaf_entry);
436 static struct xfs_dir2_leaf_entry *
437 xfs_dir2_leaf_ents_p(struct xfs_dir2_leaf *lp)
443 xfs_dir3_max_leaf_ents(struct xfs_da_geometry *geo)
445 return (geo->blksize - sizeof(struct xfs_dir3_leaf_hdr)) /
446 (uint)sizeof(struct xfs_dir2_leaf_entry);
449 static struct xfs_dir2_leaf_entry *
450 xfs_dir3_leaf_ents_p(struct xfs_dir2_leaf *lp)
452 return ((struct xfs_dir3_leaf *)lp)->__ents;
456 xfs_dir2_leaf_hdr_from_disk(
457 struct xfs_dir3_icleaf_hdr *to,
458 struct xfs_dir2_leaf *from)
460 to->forw = be32_to_cpu(from->hdr.info.forw);
461 to->back = be32_to_cpu(from->hdr.info.back);
462 to->magic = be16_to_cpu(from->hdr.info.magic);
463 to->count = be16_to_cpu(from->hdr.count);
464 to->stale = be16_to_cpu(from->hdr.stale);
466 ASSERT(to->magic == XFS_DIR2_LEAF1_MAGIC ||
467 to->magic == XFS_DIR2_LEAFN_MAGIC);
471 xfs_dir2_leaf_hdr_to_disk(
472 struct xfs_dir2_leaf *to,
473 struct xfs_dir3_icleaf_hdr *from)
475 ASSERT(from->magic == XFS_DIR2_LEAF1_MAGIC ||
476 from->magic == XFS_DIR2_LEAFN_MAGIC);
478 to->hdr.info.forw = cpu_to_be32(from->forw);
479 to->hdr.info.back = cpu_to_be32(from->back);
480 to->hdr.info.magic = cpu_to_be16(from->magic);
481 to->hdr.count = cpu_to_be16(from->count);
482 to->hdr.stale = cpu_to_be16(from->stale);
486 xfs_dir3_leaf_hdr_from_disk(
487 struct xfs_dir3_icleaf_hdr *to,
488 struct xfs_dir2_leaf *from)
490 struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)from;
492 to->forw = be32_to_cpu(hdr3->info.hdr.forw);
493 to->back = be32_to_cpu(hdr3->info.hdr.back);
494 to->magic = be16_to_cpu(hdr3->info.hdr.magic);
495 to->count = be16_to_cpu(hdr3->count);
496 to->stale = be16_to_cpu(hdr3->stale);
498 ASSERT(to->magic == XFS_DIR3_LEAF1_MAGIC ||
499 to->magic == XFS_DIR3_LEAFN_MAGIC);
503 xfs_dir3_leaf_hdr_to_disk(
504 struct xfs_dir2_leaf *to,
505 struct xfs_dir3_icleaf_hdr *from)
507 struct xfs_dir3_leaf_hdr *hdr3 = (struct xfs_dir3_leaf_hdr *)to;
509 ASSERT(from->magic == XFS_DIR3_LEAF1_MAGIC ||
510 from->magic == XFS_DIR3_LEAFN_MAGIC);
512 hdr3->info.hdr.forw = cpu_to_be32(from->forw);
513 hdr3->info.hdr.back = cpu_to_be32(from->back);
514 hdr3->info.hdr.magic = cpu_to_be16(from->magic);
515 hdr3->count = cpu_to_be16(from->count);
516 hdr3->stale = cpu_to_be16(from->stale);
521 * Directory/Attribute Node block operations
523 static struct xfs_da_node_entry *
524 xfs_da2_node_tree_p(struct xfs_da_intnode *dap)
529 static struct xfs_da_node_entry *
530 xfs_da3_node_tree_p(struct xfs_da_intnode *dap)
532 return ((struct xfs_da3_intnode *)dap)->__btree;
536 xfs_da2_node_hdr_from_disk(
537 struct xfs_da3_icnode_hdr *to,
538 struct xfs_da_intnode *from)
540 ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC));
541 to->forw = be32_to_cpu(from->hdr.info.forw);
542 to->back = be32_to_cpu(from->hdr.info.back);
543 to->magic = be16_to_cpu(from->hdr.info.magic);
544 to->count = be16_to_cpu(from->hdr.__count);
545 to->level = be16_to_cpu(from->hdr.__level);
549 xfs_da2_node_hdr_to_disk(
550 struct xfs_da_intnode *to,
551 struct xfs_da3_icnode_hdr *from)
553 ASSERT(from->magic == XFS_DA_NODE_MAGIC);
554 to->hdr.info.forw = cpu_to_be32(from->forw);
555 to->hdr.info.back = cpu_to_be32(from->back);
556 to->hdr.info.magic = cpu_to_be16(from->magic);
557 to->hdr.__count = cpu_to_be16(from->count);
558 to->hdr.__level = cpu_to_be16(from->level);
562 xfs_da3_node_hdr_from_disk(
563 struct xfs_da3_icnode_hdr *to,
564 struct xfs_da_intnode *from)
566 struct xfs_da3_node_hdr *hdr3 = (struct xfs_da3_node_hdr *)from;
568 ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_DA3_NODE_MAGIC));
569 to->forw = be32_to_cpu(hdr3->info.hdr.forw);
570 to->back = be32_to_cpu(hdr3->info.hdr.back);
571 to->magic = be16_to_cpu(hdr3->info.hdr.magic);
572 to->count = be16_to_cpu(hdr3->__count);
573 to->level = be16_to_cpu(hdr3->__level);
577 xfs_da3_node_hdr_to_disk(
578 struct xfs_da_intnode *to,
579 struct xfs_da3_icnode_hdr *from)
581 struct xfs_da3_node_hdr *hdr3 = (struct xfs_da3_node_hdr *)to;
583 ASSERT(from->magic == XFS_DA3_NODE_MAGIC);
584 hdr3->info.hdr.forw = cpu_to_be32(from->forw);
585 hdr3->info.hdr.back = cpu_to_be32(from->back);
586 hdr3->info.hdr.magic = cpu_to_be16(from->magic);
587 hdr3->__count = cpu_to_be16(from->count);
588 hdr3->__level = cpu_to_be16(from->level);
593 * Directory free space block operations
596 xfs_dir2_free_max_bests(struct xfs_da_geometry *geo)
598 return (geo->blksize - sizeof(struct xfs_dir2_free_hdr)) /
599 sizeof(xfs_dir2_data_off_t);
603 xfs_dir2_free_bests_p(struct xfs_dir2_free *free)
605 return (__be16 *)((char *)free + sizeof(struct xfs_dir2_free_hdr));
609 * Convert data space db to the corresponding free db.
612 xfs_dir2_db_to_fdb(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
614 return xfs_dir2_byte_to_db(geo, XFS_DIR2_FREE_OFFSET) +
615 (db / xfs_dir2_free_max_bests(geo));
619 * Convert data space db to the corresponding index in a free db.
622 xfs_dir2_db_to_fdindex(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
624 return db % xfs_dir2_free_max_bests(geo);
628 xfs_dir3_free_max_bests(struct xfs_da_geometry *geo)
630 return (geo->blksize - sizeof(struct xfs_dir3_free_hdr)) /
631 sizeof(xfs_dir2_data_off_t);
635 xfs_dir3_free_bests_p(struct xfs_dir2_free *free)
637 return (__be16 *)((char *)free + sizeof(struct xfs_dir3_free_hdr));
641 * Convert data space db to the corresponding free db.
644 xfs_dir3_db_to_fdb(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
646 return xfs_dir2_byte_to_db(geo, XFS_DIR2_FREE_OFFSET) +
647 (db / xfs_dir3_free_max_bests(geo));
651 * Convert data space db to the corresponding index in a free db.
654 xfs_dir3_db_to_fdindex(struct xfs_da_geometry *geo, xfs_dir2_db_t db)
656 return db % xfs_dir3_free_max_bests(geo);
660 xfs_dir2_free_hdr_from_disk(
661 struct xfs_dir3_icfree_hdr *to,
662 struct xfs_dir2_free *from)
664 to->magic = be32_to_cpu(from->hdr.magic);
665 to->firstdb = be32_to_cpu(from->hdr.firstdb);
666 to->nvalid = be32_to_cpu(from->hdr.nvalid);
667 to->nused = be32_to_cpu(from->hdr.nused);
668 ASSERT(to->magic == XFS_DIR2_FREE_MAGIC);
672 xfs_dir2_free_hdr_to_disk(
673 struct xfs_dir2_free *to,
674 struct xfs_dir3_icfree_hdr *from)
676 ASSERT(from->magic == XFS_DIR2_FREE_MAGIC);
678 to->hdr.magic = cpu_to_be32(from->magic);
679 to->hdr.firstdb = cpu_to_be32(from->firstdb);
680 to->hdr.nvalid = cpu_to_be32(from->nvalid);
681 to->hdr.nused = cpu_to_be32(from->nused);
685 xfs_dir3_free_hdr_from_disk(
686 struct xfs_dir3_icfree_hdr *to,
687 struct xfs_dir2_free *from)
689 struct xfs_dir3_free_hdr *hdr3 = (struct xfs_dir3_free_hdr *)from;
691 to->magic = be32_to_cpu(hdr3->hdr.magic);
692 to->firstdb = be32_to_cpu(hdr3->firstdb);
693 to->nvalid = be32_to_cpu(hdr3->nvalid);
694 to->nused = be32_to_cpu(hdr3->nused);
696 ASSERT(to->magic == XFS_DIR3_FREE_MAGIC);
700 xfs_dir3_free_hdr_to_disk(
701 struct xfs_dir2_free *to,
702 struct xfs_dir3_icfree_hdr *from)
704 struct xfs_dir3_free_hdr *hdr3 = (struct xfs_dir3_free_hdr *)to;
706 ASSERT(from->magic == XFS_DIR3_FREE_MAGIC);
708 hdr3->hdr.magic = cpu_to_be32(from->magic);
709 hdr3->firstdb = cpu_to_be32(from->firstdb);
710 hdr3->nvalid = cpu_to_be32(from->nvalid);
711 hdr3->nused = cpu_to_be32(from->nused);
714 static const struct xfs_dir_ops xfs_dir2_ops = {
715 .sf_entsize = xfs_dir2_sf_entsize,
716 .sf_nextentry = xfs_dir2_sf_nextentry,
717 .sf_get_ftype = xfs_dir2_sfe_get_ftype,
718 .sf_put_ftype = xfs_dir2_sfe_put_ftype,
719 .sf_get_ino = xfs_dir2_sfe_get_ino,
720 .sf_put_ino = xfs_dir2_sfe_put_ino,
721 .sf_get_parent_ino = xfs_dir2_sf_get_parent_ino,
722 .sf_put_parent_ino = xfs_dir2_sf_put_parent_ino,
724 .data_entsize = xfs_dir2_data_entsize,
725 .data_get_ftype = xfs_dir2_data_get_ftype,
726 .data_put_ftype = xfs_dir2_data_put_ftype,
727 .data_entry_tag_p = xfs_dir2_data_entry_tag_p,
728 .data_bestfree_p = xfs_dir2_data_bestfree_p,
730 .data_dot_offset = sizeof(struct xfs_dir2_data_hdr),
731 .data_dotdot_offset = sizeof(struct xfs_dir2_data_hdr) +
732 XFS_DIR2_DATA_ENTSIZE(1),
733 .data_first_offset = sizeof(struct xfs_dir2_data_hdr) +
734 XFS_DIR2_DATA_ENTSIZE(1) +
735 XFS_DIR2_DATA_ENTSIZE(2),
736 .data_entry_offset = sizeof(struct xfs_dir2_data_hdr),
738 .data_dot_entry_p = xfs_dir2_data_dot_entry_p,
739 .data_dotdot_entry_p = xfs_dir2_data_dotdot_entry_p,
740 .data_first_entry_p = xfs_dir2_data_first_entry_p,
741 .data_entry_p = xfs_dir2_data_entry_p,
742 .data_unused_p = xfs_dir2_data_unused_p,
744 .leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr),
745 .leaf_hdr_to_disk = xfs_dir2_leaf_hdr_to_disk,
746 .leaf_hdr_from_disk = xfs_dir2_leaf_hdr_from_disk,
747 .leaf_max_ents = xfs_dir2_max_leaf_ents,
748 .leaf_ents_p = xfs_dir2_leaf_ents_p,
750 .node_hdr_size = sizeof(struct xfs_da_node_hdr),
751 .node_hdr_to_disk = xfs_da2_node_hdr_to_disk,
752 .node_hdr_from_disk = xfs_da2_node_hdr_from_disk,
753 .node_tree_p = xfs_da2_node_tree_p,
755 .free_hdr_size = sizeof(struct xfs_dir2_free_hdr),
756 .free_hdr_to_disk = xfs_dir2_free_hdr_to_disk,
757 .free_hdr_from_disk = xfs_dir2_free_hdr_from_disk,
758 .free_max_bests = xfs_dir2_free_max_bests,
759 .free_bests_p = xfs_dir2_free_bests_p,
760 .db_to_fdb = xfs_dir2_db_to_fdb,
761 .db_to_fdindex = xfs_dir2_db_to_fdindex,
764 static const struct xfs_dir_ops xfs_dir2_ftype_ops = {
765 .sf_entsize = xfs_dir3_sf_entsize,
766 .sf_nextentry = xfs_dir3_sf_nextentry,
767 .sf_get_ftype = xfs_dir3_sfe_get_ftype,
768 .sf_put_ftype = xfs_dir3_sfe_put_ftype,
769 .sf_get_ino = xfs_dir3_sfe_get_ino,
770 .sf_put_ino = xfs_dir3_sfe_put_ino,
771 .sf_get_parent_ino = xfs_dir2_sf_get_parent_ino,
772 .sf_put_parent_ino = xfs_dir2_sf_put_parent_ino,
774 .data_entsize = xfs_dir3_data_entsize,
775 .data_get_ftype = xfs_dir3_data_get_ftype,
776 .data_put_ftype = xfs_dir3_data_put_ftype,
777 .data_entry_tag_p = xfs_dir3_data_entry_tag_p,
778 .data_bestfree_p = xfs_dir2_data_bestfree_p,
780 .data_dot_offset = sizeof(struct xfs_dir2_data_hdr),
781 .data_dotdot_offset = sizeof(struct xfs_dir2_data_hdr) +
782 XFS_DIR3_DATA_ENTSIZE(1),
783 .data_first_offset = sizeof(struct xfs_dir2_data_hdr) +
784 XFS_DIR3_DATA_ENTSIZE(1) +
785 XFS_DIR3_DATA_ENTSIZE(2),
786 .data_entry_offset = sizeof(struct xfs_dir2_data_hdr),
788 .data_dot_entry_p = xfs_dir2_data_dot_entry_p,
789 .data_dotdot_entry_p = xfs_dir2_ftype_data_dotdot_entry_p,
790 .data_first_entry_p = xfs_dir2_ftype_data_first_entry_p,
791 .data_entry_p = xfs_dir2_data_entry_p,
792 .data_unused_p = xfs_dir2_data_unused_p,
794 .leaf_hdr_size = sizeof(struct xfs_dir2_leaf_hdr),
795 .leaf_hdr_to_disk = xfs_dir2_leaf_hdr_to_disk,
796 .leaf_hdr_from_disk = xfs_dir2_leaf_hdr_from_disk,
797 .leaf_max_ents = xfs_dir2_max_leaf_ents,
798 .leaf_ents_p = xfs_dir2_leaf_ents_p,
800 .node_hdr_size = sizeof(struct xfs_da_node_hdr),
801 .node_hdr_to_disk = xfs_da2_node_hdr_to_disk,
802 .node_hdr_from_disk = xfs_da2_node_hdr_from_disk,
803 .node_tree_p = xfs_da2_node_tree_p,
805 .free_hdr_size = sizeof(struct xfs_dir2_free_hdr),
806 .free_hdr_to_disk = xfs_dir2_free_hdr_to_disk,
807 .free_hdr_from_disk = xfs_dir2_free_hdr_from_disk,
808 .free_max_bests = xfs_dir2_free_max_bests,
809 .free_bests_p = xfs_dir2_free_bests_p,
810 .db_to_fdb = xfs_dir2_db_to_fdb,
811 .db_to_fdindex = xfs_dir2_db_to_fdindex,
814 static const struct xfs_dir_ops xfs_dir3_ops = {
815 .sf_entsize = xfs_dir3_sf_entsize,
816 .sf_nextentry = xfs_dir3_sf_nextentry,
817 .sf_get_ftype = xfs_dir3_sfe_get_ftype,
818 .sf_put_ftype = xfs_dir3_sfe_put_ftype,
819 .sf_get_ino = xfs_dir3_sfe_get_ino,
820 .sf_put_ino = xfs_dir3_sfe_put_ino,
821 .sf_get_parent_ino = xfs_dir2_sf_get_parent_ino,
822 .sf_put_parent_ino = xfs_dir2_sf_put_parent_ino,
824 .data_entsize = xfs_dir3_data_entsize,
825 .data_get_ftype = xfs_dir3_data_get_ftype,
826 .data_put_ftype = xfs_dir3_data_put_ftype,
827 .data_entry_tag_p = xfs_dir3_data_entry_tag_p,
828 .data_bestfree_p = xfs_dir3_data_bestfree_p,
830 .data_dot_offset = sizeof(struct xfs_dir3_data_hdr),
831 .data_dotdot_offset = sizeof(struct xfs_dir3_data_hdr) +
832 XFS_DIR3_DATA_ENTSIZE(1),
833 .data_first_offset = sizeof(struct xfs_dir3_data_hdr) +
834 XFS_DIR3_DATA_ENTSIZE(1) +
835 XFS_DIR3_DATA_ENTSIZE(2),
836 .data_entry_offset = sizeof(struct xfs_dir3_data_hdr),
838 .data_dot_entry_p = xfs_dir3_data_dot_entry_p,
839 .data_dotdot_entry_p = xfs_dir3_data_dotdot_entry_p,
840 .data_first_entry_p = xfs_dir3_data_first_entry_p,
841 .data_entry_p = xfs_dir3_data_entry_p,
842 .data_unused_p = xfs_dir3_data_unused_p,
844 .leaf_hdr_size = sizeof(struct xfs_dir3_leaf_hdr),
845 .leaf_hdr_to_disk = xfs_dir3_leaf_hdr_to_disk,
846 .leaf_hdr_from_disk = xfs_dir3_leaf_hdr_from_disk,
847 .leaf_max_ents = xfs_dir3_max_leaf_ents,
848 .leaf_ents_p = xfs_dir3_leaf_ents_p,
850 .node_hdr_size = sizeof(struct xfs_da3_node_hdr),
851 .node_hdr_to_disk = xfs_da3_node_hdr_to_disk,
852 .node_hdr_from_disk = xfs_da3_node_hdr_from_disk,
853 .node_tree_p = xfs_da3_node_tree_p,
855 .free_hdr_size = sizeof(struct xfs_dir3_free_hdr),
856 .free_hdr_to_disk = xfs_dir3_free_hdr_to_disk,
857 .free_hdr_from_disk = xfs_dir3_free_hdr_from_disk,
858 .free_max_bests = xfs_dir3_free_max_bests,
859 .free_bests_p = xfs_dir3_free_bests_p,
860 .db_to_fdb = xfs_dir3_db_to_fdb,
861 .db_to_fdindex = xfs_dir3_db_to_fdindex,
864 static const struct xfs_dir_ops xfs_dir2_nondir_ops = {
865 .node_hdr_size = sizeof(struct xfs_da_node_hdr),
866 .node_hdr_to_disk = xfs_da2_node_hdr_to_disk,
867 .node_hdr_from_disk = xfs_da2_node_hdr_from_disk,
868 .node_tree_p = xfs_da2_node_tree_p,
871 static const struct xfs_dir_ops xfs_dir3_nondir_ops = {
872 .node_hdr_size = sizeof(struct xfs_da3_node_hdr),
873 .node_hdr_to_disk = xfs_da3_node_hdr_to_disk,
874 .node_hdr_from_disk = xfs_da3_node_hdr_from_disk,
875 .node_tree_p = xfs_da3_node_tree_p,
879 * Return the ops structure according to the current config. If we are passed
880 * an inode, then that overrides the default config we use which is based on
883 const struct xfs_dir_ops *
885 struct xfs_mount *mp,
886 struct xfs_inode *dp)
890 if (mp->m_dir_inode_ops)
891 return mp->m_dir_inode_ops;
892 if (xfs_sb_version_hascrc(&mp->m_sb))
893 return &xfs_dir3_ops;
894 if (xfs_sb_version_hasftype(&mp->m_sb))
895 return &xfs_dir2_ftype_ops;
896 return &xfs_dir2_ops;
899 const struct xfs_dir_ops *
901 struct xfs_mount *mp,
902 struct xfs_inode *dp)
906 if (mp->m_nondir_inode_ops)
907 return mp->m_nondir_inode_ops;
908 if (xfs_sb_version_hascrc(&mp->m_sb))
909 return &xfs_dir3_nondir_ops;
910 return &xfs_dir2_nondir_ops;