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_format.h"
21 #include "xfs_log_format.h"
22 #include "xfs_trans_resv.h"
25 #include "xfs_mount.h"
26 #include "xfs_da_format.h"
27 #include "xfs_da_btree.h"
28 #include "xfs_inode.h"
29 #include "xfs_trans.h"
30 #include "xfs_inode_item.h"
31 #include "xfs_error.h"
33 #include "xfs_dir2_priv.h"
34 #include "xfs_trace.h"
35 #include "xfs_dinode.h"
38 * Prototypes for internal functions.
40 static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
41 xfs_dir2_sf_entry_t *sfep,
42 xfs_dir2_data_aoff_t offset,
44 static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
46 static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
47 xfs_dir2_sf_entry_t **sfepp,
48 xfs_dir2_data_aoff_t *offsetp);
50 static void xfs_dir2_sf_check(xfs_da_args_t *args);
52 #define xfs_dir2_sf_check(args)
55 static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
56 static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
57 #endif /* XFS_BIG_INUMS */
60 * Inode numbers in short-form directories can come in two versions,
61 * either 4 bytes or 8 bytes wide. These helpers deal with the
62 * two forms transparently by looking at the headers i8count field.
64 * For 64-bit inode number the most significant byte must be zero.
68 struct xfs_dir2_sf_hdr *hdr,
69 xfs_dir2_inou_t *from)
72 return get_unaligned_be64(&from->i8.i) & 0x00ffffffffffffffULL;
74 return get_unaligned_be32(&from->i4.i);
79 struct xfs_dir2_sf_hdr *hdr,
83 ASSERT((ino & 0xff00000000000000ULL) == 0);
86 put_unaligned_be64(ino, &to->i8.i);
88 put_unaligned_be32(ino, &to->i4.i);
92 xfs_dir2_sf_get_parent_ino(
93 struct xfs_dir2_sf_hdr *hdr)
95 return xfs_dir2_sf_get_ino(hdr, &hdr->parent);
99 xfs_dir2_sf_put_parent_ino(
100 struct xfs_dir2_sf_hdr *hdr,
103 xfs_dir2_sf_put_ino(hdr, &hdr->parent, ino);
107 * In short-form directory entries the inode numbers are stored at variable
108 * offset behind the entry name. If the entry stores a filetype value, then it
109 * sits between the name and the inode number. Hence the inode numbers may only
110 * be accessed through the helpers below.
112 static xfs_dir2_inou_t *
114 struct xfs_mount *mp,
115 struct xfs_dir2_sf_entry *sfep)
117 __uint8_t *ptr = &sfep->name[sfep->namelen];
118 if (xfs_sb_version_hasftype(&mp->m_sb))
120 return (xfs_dir2_inou_t *)ptr;
124 xfs_dir3_sfe_get_ino(
125 struct xfs_mount *mp,
126 struct xfs_dir2_sf_hdr *hdr,
127 struct xfs_dir2_sf_entry *sfep)
129 return xfs_dir2_sf_get_ino(hdr, xfs_dir3_sfe_inop(mp, sfep));
133 xfs_dir3_sfe_put_ino(
134 struct xfs_mount *mp,
135 struct xfs_dir2_sf_hdr *hdr,
136 struct xfs_dir2_sf_entry *sfep,
139 xfs_dir2_sf_put_ino(hdr, xfs_dir3_sfe_inop(mp, sfep), ino);
143 * Given a block directory (dp/block), calculate its size as a shortform (sf)
144 * directory and a header for the sf directory, if it will fit it the
145 * space currently present in the inode. If it won't fit, the output
146 * size is too big (but not accurate).
148 int /* size for sf form */
149 xfs_dir2_block_sfsize(
150 xfs_inode_t *dp, /* incore inode pointer */
151 xfs_dir2_data_hdr_t *hdr, /* block directory data */
152 xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
154 xfs_dir2_dataptr_t addr; /* data entry address */
155 xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
156 xfs_dir2_block_tail_t *btp; /* tail area of the block */
157 int count; /* shortform entry count */
158 xfs_dir2_data_entry_t *dep; /* data entry in the block */
159 int i; /* block entry index */
160 int i8count; /* count of big-inode entries */
161 int isdot; /* entry is "." */
162 int isdotdot; /* entry is ".." */
163 xfs_mount_t *mp; /* mount structure pointer */
164 int namelen; /* total name bytes */
165 xfs_ino_t parent = 0; /* parent inode number */
166 int size=0; /* total computed size */
172 * if there is a filetype field, add the extra byte to the namelen
173 * for each entry that we see.
175 has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0;
177 count = i8count = namelen = 0;
178 btp = xfs_dir2_block_tail_p(mp, hdr);
179 blp = xfs_dir2_block_leaf_p(btp);
182 * Iterate over the block's data entries by using the leaf pointers.
184 for (i = 0; i < be32_to_cpu(btp->count); i++) {
185 if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
188 * Calculate the pointer to the entry at hand.
190 dep = (xfs_dir2_data_entry_t *)
191 ((char *)hdr + xfs_dir2_dataptr_to_off(mp, addr));
193 * Detect . and .., so we can special-case them.
194 * . is not included in sf directories.
195 * .. is included by just the parent inode number.
197 isdot = dep->namelen == 1 && dep->name[0] == '.';
200 dep->name[0] == '.' && dep->name[1] == '.';
203 i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
205 /* take into account the file type field */
206 if (!isdot && !isdotdot) {
208 namelen += dep->namelen + has_ftype;
210 parent = be64_to_cpu(dep->inumber);
212 * Calculate the new size, see if we should give up yet.
214 size = xfs_dir2_sf_hdr_size(i8count) + /* header */
215 count + /* namelen */
216 count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
218 (i8count ? /* inumber */
219 (uint)sizeof(xfs_dir2_ino8_t) * count :
220 (uint)sizeof(xfs_dir2_ino4_t) * count);
221 if (size > XFS_IFORK_DSIZE(dp))
222 return size; /* size value is a failure */
225 * Create the output header, if it worked.
228 sfhp->i8count = i8count;
229 xfs_dir2_sf_put_parent_ino(sfhp, parent);
234 * Convert a block format directory to shortform.
235 * Caller has already checked that it will fit, and built us a header.
238 xfs_dir2_block_to_sf(
239 xfs_da_args_t *args, /* operation arguments */
241 int size, /* shortform directory size */
242 xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
244 xfs_dir2_data_hdr_t *hdr; /* block header */
245 xfs_dir2_block_tail_t *btp; /* block tail pointer */
246 xfs_dir2_data_entry_t *dep; /* data entry pointer */
247 xfs_inode_t *dp; /* incore directory inode */
248 xfs_dir2_data_unused_t *dup; /* unused data pointer */
249 char *endptr; /* end of data entries */
250 int error; /* error return value */
251 int logflags; /* inode logging flags */
252 xfs_mount_t *mp; /* filesystem mount point */
253 char *ptr; /* current data pointer */
254 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
255 xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */
257 trace_xfs_dir2_block_to_sf(args);
263 * Make a copy of the block data, so we can shrink the inode
264 * and add local data.
266 hdr = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
267 memcpy(hdr, bp->b_addr, mp->m_dirblksize);
268 logflags = XFS_ILOG_CORE;
269 if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
270 ASSERT(error != ENOSPC);
275 * The buffer is now unconditionally gone, whether
276 * xfs_dir2_shrink_inode worked or not.
278 * Convert the inode to local format.
280 dp->i_df.if_flags &= ~XFS_IFEXTENTS;
281 dp->i_df.if_flags |= XFS_IFINLINE;
282 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
283 ASSERT(dp->i_df.if_bytes == 0);
284 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
285 logflags |= XFS_ILOG_DDATA;
287 * Copy the header into the newly allocate local space.
289 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
290 memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
291 dp->i_d.di_size = size;
293 * Set up to loop over the block's entries.
295 btp = xfs_dir2_block_tail_p(mp, hdr);
296 ptr = (char *)xfs_dir3_data_entry_p(hdr);
297 endptr = (char *)xfs_dir2_block_leaf_p(btp);
298 sfep = xfs_dir2_sf_firstentry(sfp);
300 * Loop over the active and unused entries.
301 * Stop when we reach the leaf/tail portion of the block.
303 while (ptr < endptr) {
305 * If it's unused, just skip over it.
307 dup = (xfs_dir2_data_unused_t *)ptr;
308 if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
309 ptr += be16_to_cpu(dup->length);
312 dep = (xfs_dir2_data_entry_t *)ptr;
316 if (dep->namelen == 1 && dep->name[0] == '.')
317 ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
319 * Skip .., but make sure the inode number is right.
321 else if (dep->namelen == 2 &&
322 dep->name[0] == '.' && dep->name[1] == '.')
323 ASSERT(be64_to_cpu(dep->inumber) ==
324 xfs_dir2_sf_get_parent_ino(sfp));
326 * Normal entry, copy it into shortform.
329 sfep->namelen = dep->namelen;
330 xfs_dir2_sf_put_offset(sfep,
331 (xfs_dir2_data_aoff_t)
332 ((char *)dep - (char *)hdr));
333 memcpy(sfep->name, dep->name, dep->namelen);
334 xfs_dir3_sfe_put_ino(mp, sfp, sfep,
335 be64_to_cpu(dep->inumber));
336 xfs_dir3_sfe_put_ftype(mp, sfp, sfep,
337 xfs_dir3_dirent_get_ftype(mp, dep));
339 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
341 ptr += xfs_dir3_data_entsize(mp, dep->namelen);
343 ASSERT((char *)sfep - (char *)sfp == size);
344 xfs_dir2_sf_check(args);
346 xfs_trans_log_inode(args->trans, dp, logflags);
352 * Add a name to a shortform directory.
353 * There are two algorithms, "easy" and "hard" which we decide on
354 * before changing anything.
355 * Convert to block form if necessary, if the new entry won't fit.
359 xfs_da_args_t *args) /* operation arguments */
361 int add_entsize; /* size of the new entry */
362 xfs_inode_t *dp; /* incore directory inode */
363 int error; /* error return value */
364 int incr_isize; /* total change in size */
365 int new_isize; /* di_size after adding name */
366 int objchange; /* changing to 8-byte inodes */
367 xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
368 int old_isize; /* di_size before adding name */
369 int pick; /* which algorithm to use */
370 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
371 xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
373 trace_xfs_dir2_sf_addname(args);
375 ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
377 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
379 * Make sure the shortform value has some of its header.
381 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
382 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
383 return XFS_ERROR(EIO);
385 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
386 ASSERT(dp->i_df.if_u1.if_data != NULL);
387 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
388 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
390 * Compute entry (and change in) size.
392 add_entsize = dp->d_ops->sf_entsize(sfp, args->namelen);
393 incr_isize = add_entsize;
397 * Do we have to change to 8 byte inodes?
399 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
401 * Yes, adjust the entry size and the total size.
404 (uint)sizeof(xfs_dir2_ino8_t) -
405 (uint)sizeof(xfs_dir2_ino4_t);
408 ((uint)sizeof(xfs_dir2_ino8_t) -
409 (uint)sizeof(xfs_dir2_ino4_t));
413 old_isize = (int)dp->i_d.di_size;
414 new_isize = old_isize + incr_isize;
416 * Won't fit as shortform any more (due to size),
417 * or the pick routine says it won't (due to offset values).
419 if (new_isize > XFS_IFORK_DSIZE(dp) ||
421 xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
423 * Just checking or no space reservation, it doesn't fit.
425 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
426 return XFS_ERROR(ENOSPC);
428 * Convert to block form then add the name.
430 error = xfs_dir2_sf_to_block(args);
433 return xfs_dir2_block_addname(args);
436 * Just checking, it fits.
438 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
441 * Do it the easy way - just add it at the end.
444 xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
446 * Do it the hard way - look for a place to insert the new entry.
447 * Convert to 8 byte inode numbers first if necessary.
453 xfs_dir2_sf_toino8(args);
455 xfs_dir2_sf_addname_hard(args, objchange, new_isize);
457 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
462 * Add the new entry the "easy" way.
463 * This is copying the old directory and adding the new entry at the end.
464 * Since it's sorted by "offset" we need room after the last offset
465 * that's already there, and then room to convert to a block directory.
466 * This is already checked by the pick routine.
469 xfs_dir2_sf_addname_easy(
470 xfs_da_args_t *args, /* operation arguments */
471 xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
472 xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
473 int new_isize) /* new directory size */
475 int byteoff; /* byte offset in sf dir */
476 xfs_inode_t *dp; /* incore directory inode */
477 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
481 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
482 byteoff = (int)((char *)sfep - (char *)sfp);
484 * Grow the in-inode space.
486 xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen),
489 * Need to set up again due to realloc of the inode data.
491 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
492 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
494 * Fill in the new entry.
496 sfep->namelen = args->namelen;
497 xfs_dir2_sf_put_offset(sfep, offset);
498 memcpy(sfep->name, args->name, sfep->namelen);
499 xfs_dir3_sfe_put_ino(dp->i_mount, sfp, sfep, args->inumber);
500 xfs_dir3_sfe_put_ftype(dp->i_mount, sfp, sfep, args->filetype);
503 * Update the header and inode.
507 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
510 dp->i_d.di_size = new_isize;
511 xfs_dir2_sf_check(args);
515 * Add the new entry the "hard" way.
516 * The caller has already converted to 8 byte inode numbers if necessary,
517 * in which case we need to leave the i8count at 1.
518 * Find a hole that the new entry will fit into, and copy
519 * the first part of the entries, the new entry, and the last part of
524 xfs_dir2_sf_addname_hard(
525 xfs_da_args_t *args, /* operation arguments */
526 int objchange, /* changing inode number size */
527 int new_isize) /* new directory size */
529 int add_datasize; /* data size need for new ent */
530 char *buf; /* buffer for old */
531 xfs_inode_t *dp; /* incore directory inode */
532 int eof; /* reached end of old dir */
533 int nbytes; /* temp for byte copies */
534 xfs_dir2_data_aoff_t new_offset; /* next offset value */
535 xfs_dir2_data_aoff_t offset; /* current offset value */
536 int old_isize; /* previous di_size */
537 xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
538 xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */
539 xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
540 xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
541 struct xfs_mount *mp;
544 * Copy the old directory to the stack buffer.
549 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
550 old_isize = (int)dp->i_d.di_size;
551 buf = kmem_alloc(old_isize, KM_SLEEP);
552 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
553 memcpy(oldsfp, sfp, old_isize);
555 * Loop over the old directory finding the place we're going
556 * to insert the new entry.
557 * If it's going to end up at the end then oldsfep will point there.
559 for (offset = xfs_dir3_data_first_offset(mp),
560 oldsfep = xfs_dir2_sf_firstentry(oldsfp),
561 add_datasize = xfs_dir3_data_entsize(mp, args->namelen),
562 eof = (char *)oldsfep == &buf[old_isize];
564 offset = new_offset + xfs_dir3_data_entsize(mp, oldsfep->namelen),
565 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep),
566 eof = (char *)oldsfep == &buf[old_isize]) {
567 new_offset = xfs_dir2_sf_get_offset(oldsfep);
568 if (offset + add_datasize <= new_offset)
572 * Get rid of the old directory, then allocate space for
573 * the new one. We do this so xfs_idata_realloc won't copy
576 xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
577 xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
579 * Reset the pointer since the buffer was reallocated.
581 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
583 * Copy the first part of the directory, including the header.
585 nbytes = (int)((char *)oldsfep - (char *)oldsfp);
586 memcpy(sfp, oldsfp, nbytes);
587 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
589 * Fill in the new entry, and update the header counts.
591 sfep->namelen = args->namelen;
592 xfs_dir2_sf_put_offset(sfep, offset);
593 memcpy(sfep->name, args->name, sfep->namelen);
594 xfs_dir3_sfe_put_ino(mp, sfp, sfep, args->inumber);
595 xfs_dir3_sfe_put_ftype(mp, sfp, sfep, args->filetype);
598 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
602 * If there's more left to copy, do that.
605 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
606 memcpy(sfep, oldsfep, old_isize - nbytes);
609 dp->i_d.di_size = new_isize;
610 xfs_dir2_sf_check(args);
614 * Decide if the new entry will fit at all.
615 * If it will fit, pick between adding the new entry to the end (easy)
616 * or somewhere else (hard).
617 * Return 0 (won't fit), 1 (easy), 2 (hard).
620 static int /* pick result */
621 xfs_dir2_sf_addname_pick(
622 xfs_da_args_t *args, /* operation arguments */
623 int objchange, /* inode # size changes */
624 xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
625 xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
627 xfs_inode_t *dp; /* incore directory inode */
628 int holefit; /* found hole it will fit in */
629 int i; /* entry number */
630 xfs_mount_t *mp; /* filesystem mount point */
631 xfs_dir2_data_aoff_t offset; /* data block offset */
632 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
633 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
634 int size; /* entry's data size */
635 int used; /* data bytes used */
640 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
641 size = xfs_dir3_data_entsize(mp, args->namelen);
642 offset = xfs_dir3_data_first_offset(mp);
643 sfep = xfs_dir2_sf_firstentry(sfp);
646 * Loop over sf entries.
647 * Keep track of data offset and whether we've seen a place
648 * to insert the new entry.
650 for (i = 0; i < sfp->count; i++) {
652 holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
653 offset = xfs_dir2_sf_get_offset(sfep) +
654 xfs_dir3_data_entsize(mp, sfep->namelen);
655 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
658 * Calculate data bytes used excluding the new entry, if this
659 * was a data block (block form directory).
662 (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
663 (uint)sizeof(xfs_dir2_block_tail_t);
665 * If it won't fit in a block form then we can't insert it,
666 * we'll go back, convert to block, then try the insert and convert
669 if (used + (holefit ? 0 : size) > mp->m_dirblksize)
672 * If changing the inode number size, do it the hard way.
679 ASSERT(objchange == 0);
682 * If it won't fit at the end then do it the hard way (use the hole).
684 if (used + size > mp->m_dirblksize)
687 * Do it the easy way.
696 * Check consistency of shortform directory, assert if bad.
700 xfs_da_args_t *args) /* operation arguments */
702 xfs_inode_t *dp; /* incore directory inode */
703 int i; /* entry number */
704 int i8count; /* number of big inode#s */
705 xfs_ino_t ino; /* entry inode number */
706 int offset; /* data offset */
707 xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
708 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
709 struct xfs_mount *mp;
714 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
715 offset = xfs_dir3_data_first_offset(mp);
716 ino = xfs_dir2_sf_get_parent_ino(sfp);
717 i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
719 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
721 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
722 ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
723 ino = xfs_dir3_sfe_get_ino(mp, sfp, sfep);
724 i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
726 xfs_dir2_sf_get_offset(sfep) +
727 xfs_dir3_data_entsize(mp, sfep->namelen);
728 ASSERT(xfs_dir3_sfe_get_ftype(mp, sfp, sfep) <
731 ASSERT(i8count == sfp->i8count);
732 ASSERT(XFS_BIG_INUMS || i8count == 0);
733 ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
735 (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
736 (uint)sizeof(xfs_dir2_block_tail_t) <= mp->m_dirblksize);
741 * Create a new (shortform) directory.
743 int /* error, always 0 */
745 xfs_da_args_t *args, /* operation arguments */
746 xfs_ino_t pino) /* parent inode number */
748 xfs_inode_t *dp; /* incore directory inode */
749 int i8count; /* parent inode is an 8-byte number */
750 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
751 int size; /* directory size */
753 trace_xfs_dir2_sf_create(args);
758 ASSERT(dp->i_d.di_size == 0);
760 * If it's currently a zero-length extent file,
761 * convert it to local format.
763 if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
764 dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
765 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
766 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
767 dp->i_df.if_flags |= XFS_IFINLINE;
769 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
770 ASSERT(dp->i_df.if_bytes == 0);
771 i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
772 size = xfs_dir2_sf_hdr_size(i8count);
774 * Make a buffer for the data.
776 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
778 * Fill in the header,
780 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
781 sfp->i8count = i8count;
783 * Now can put in the inode number, since i8count is set.
785 xfs_dir2_sf_put_parent_ino(sfp, pino);
787 dp->i_d.di_size = size;
788 xfs_dir2_sf_check(args);
789 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
794 * Lookup an entry in a shortform directory.
795 * Returns EEXIST if found, ENOENT if not found.
799 xfs_da_args_t *args) /* operation arguments */
801 xfs_inode_t *dp; /* incore directory inode */
802 int i; /* entry index */
804 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
805 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
806 enum xfs_dacmp cmp; /* comparison result */
807 xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
809 trace_xfs_dir2_sf_lookup(args);
811 xfs_dir2_sf_check(args);
814 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
816 * Bail out if the directory is way too short.
818 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
819 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
820 return XFS_ERROR(EIO);
822 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
823 ASSERT(dp->i_df.if_u1.if_data != NULL);
824 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
825 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
829 if (args->namelen == 1 && args->name[0] == '.') {
830 args->inumber = dp->i_ino;
831 args->cmpresult = XFS_CMP_EXACT;
832 args->filetype = XFS_DIR3_FT_DIR;
833 return XFS_ERROR(EEXIST);
836 * Special case for ..
838 if (args->namelen == 2 &&
839 args->name[0] == '.' && args->name[1] == '.') {
840 args->inumber = xfs_dir2_sf_get_parent_ino(sfp);
841 args->cmpresult = XFS_CMP_EXACT;
842 args->filetype = XFS_DIR3_FT_DIR;
843 return XFS_ERROR(EEXIST);
846 * Loop over all the entries trying to match ours.
849 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
850 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
852 * Compare name and if it's an exact match, return the inode
853 * number. If it's the first case-insensitive match, store the
854 * inode number and continue looking for an exact match.
856 cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name,
858 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
859 args->cmpresult = cmp;
860 args->inumber = xfs_dir3_sfe_get_ino(dp->i_mount,
862 args->filetype = xfs_dir3_sfe_get_ftype(dp->i_mount,
864 if (cmp == XFS_CMP_EXACT)
865 return XFS_ERROR(EEXIST);
869 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
871 * Here, we can only be doing a lookup (not a rename or replace).
872 * If a case-insensitive match was not found, return ENOENT.
875 return XFS_ERROR(ENOENT);
876 /* otherwise process the CI match as required by the caller */
877 error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
878 return XFS_ERROR(error);
882 * Remove an entry from a shortform directory.
885 xfs_dir2_sf_removename(
888 int byteoff; /* offset of removed entry */
889 xfs_inode_t *dp; /* incore directory inode */
890 int entsize; /* this entry's size */
891 int i; /* shortform entry index */
892 int newsize; /* new inode size */
893 int oldsize; /* old inode size */
894 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
895 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
897 trace_xfs_dir2_sf_removename(args);
901 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
902 oldsize = (int)dp->i_d.di_size;
904 * Bail out if the directory is way too short.
906 if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
907 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
908 return XFS_ERROR(EIO);
910 ASSERT(dp->i_df.if_bytes == oldsize);
911 ASSERT(dp->i_df.if_u1.if_data != NULL);
912 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
913 ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count));
915 * Loop over the old directory entries.
916 * Find the one we're deleting.
918 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
919 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
920 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
922 ASSERT(xfs_dir3_sfe_get_ino(dp->i_mount, sfp, sfep) ==
931 return XFS_ERROR(ENOENT);
935 byteoff = (int)((char *)sfep - (char *)sfp);
936 entsize = dp->d_ops->sf_entsize(sfp, args->namelen);
937 newsize = oldsize - entsize;
939 * Copy the part if any after the removed entry, sliding it down.
941 if (byteoff + entsize < oldsize)
942 memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
943 oldsize - (byteoff + entsize));
945 * Fix up the header and file size.
948 dp->i_d.di_size = newsize;
950 * Reallocate, making it smaller.
952 xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
953 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
956 * Are we changing inode number size?
958 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
959 if (sfp->i8count == 1)
960 xfs_dir2_sf_toino4(args);
965 xfs_dir2_sf_check(args);
966 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
971 * Replace the inode number of an entry in a shortform directory.
975 xfs_da_args_t *args) /* operation arguments */
977 xfs_inode_t *dp; /* incore directory inode */
978 int i; /* entry index */
979 #if XFS_BIG_INUMS || defined(DEBUG)
980 xfs_ino_t ino=0; /* entry old inode number */
983 int i8elevated; /* sf_toino8 set i8count=1 */
985 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
986 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
988 trace_xfs_dir2_sf_replace(args);
992 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
994 * Bail out if the shortform directory is way too small.
996 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
997 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
998 return XFS_ERROR(EIO);
1000 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
1001 ASSERT(dp->i_df.if_u1.if_data != NULL);
1002 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1003 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
1006 * New inode number is large, and need to convert to 8-byte inodes.
1008 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
1009 int error; /* error return value */
1010 int newsize; /* new inode size */
1015 ((uint)sizeof(xfs_dir2_ino8_t) -
1016 (uint)sizeof(xfs_dir2_ino4_t));
1018 * Won't fit as shortform, convert to block then do replace.
1020 if (newsize > XFS_IFORK_DSIZE(dp)) {
1021 error = xfs_dir2_sf_to_block(args);
1025 return xfs_dir2_block_replace(args);
1028 * Still fits, convert to 8-byte now.
1030 xfs_dir2_sf_toino8(args);
1032 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1036 ASSERT(args->namelen != 1 || args->name[0] != '.');
1038 * Replace ..'s entry.
1040 if (args->namelen == 2 &&
1041 args->name[0] == '.' && args->name[1] == '.') {
1042 #if XFS_BIG_INUMS || defined(DEBUG)
1043 ino = xfs_dir2_sf_get_parent_ino(sfp);
1044 ASSERT(args->inumber != ino);
1046 xfs_dir2_sf_put_parent_ino(sfp, args->inumber);
1049 * Normal entry, look for the name.
1052 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
1053 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
1054 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
1056 #if XFS_BIG_INUMS || defined(DEBUG)
1057 ino = xfs_dir3_sfe_get_ino(dp->i_mount,
1059 ASSERT(args->inumber != ino);
1061 xfs_dir3_sfe_put_ino(dp->i_mount, sfp, sfep,
1063 xfs_dir3_sfe_put_ftype(dp->i_mount, sfp, sfep,
1071 if (i == sfp->count) {
1072 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
1075 xfs_dir2_sf_toino4(args);
1077 return XFS_ERROR(ENOENT);
1082 * See if the old number was large, the new number is small.
1084 if (ino > XFS_DIR2_MAX_SHORT_INUM &&
1085 args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
1087 * And the old count was one, so need to convert to small.
1089 if (sfp->i8count == 1)
1090 xfs_dir2_sf_toino4(args);
1095 * See if the old number was small, the new number is large.
1097 if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
1098 args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1100 * add to the i8count unless we just converted to 8-byte
1101 * inodes (which does an implied i8count = 1)
1103 ASSERT(sfp->i8count != 0);
1108 xfs_dir2_sf_check(args);
1109 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1115 * Convert from 8-byte inode numbers to 4-byte inode numbers.
1116 * The last 8-byte inode number is gone, but the count is still 1.
1120 xfs_da_args_t *args) /* operation arguments */
1122 char *buf; /* old dir's buffer */
1123 xfs_inode_t *dp; /* incore directory inode */
1124 int i; /* entry index */
1125 int newsize; /* new inode size */
1126 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1127 xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1128 int oldsize; /* old inode size */
1129 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1130 xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1131 struct xfs_mount *mp;
1133 trace_xfs_dir2_sf_toino4(args);
1139 * Copy the old directory to the buffer.
1140 * Then nuke it from the inode, and add the new buffer to the inode.
1141 * Don't want xfs_idata_realloc copying the data here.
1143 oldsize = dp->i_df.if_bytes;
1144 buf = kmem_alloc(oldsize, KM_SLEEP);
1145 oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1146 ASSERT(oldsfp->i8count == 1);
1147 memcpy(buf, oldsfp, oldsize);
1149 * Compute the new inode size.
1153 (oldsfp->count + 1) *
1154 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1155 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1156 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1158 * Reset our pointers, the data has moved.
1160 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1161 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1163 * Fill in the new header.
1165 sfp->count = oldsfp->count;
1167 xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
1169 * Copy the entries field by field.
1171 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1172 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1174 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
1175 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
1176 sfep->namelen = oldsfep->namelen;
1177 sfep->offset = oldsfep->offset;
1178 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1179 xfs_dir3_sfe_put_ino(mp, sfp, sfep,
1180 xfs_dir3_sfe_get_ino(mp, oldsfp, oldsfep));
1181 xfs_dir3_sfe_put_ftype(mp, sfp, sfep,
1182 xfs_dir3_sfe_get_ftype(mp, oldsfp, oldsfep));
1185 * Clean up the inode.
1188 dp->i_d.di_size = newsize;
1189 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1193 * Convert from 4-byte inode numbers to 8-byte inode numbers.
1194 * The new 8-byte inode number is not there yet, we leave with the
1195 * count 1 but no corresponding entry.
1199 xfs_da_args_t *args) /* operation arguments */
1201 char *buf; /* old dir's buffer */
1202 xfs_inode_t *dp; /* incore directory inode */
1203 int i; /* entry index */
1204 int newsize; /* new inode size */
1205 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1206 xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1207 int oldsize; /* old inode size */
1208 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1209 xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1210 struct xfs_mount *mp;
1212 trace_xfs_dir2_sf_toino8(args);
1218 * Copy the old directory to the buffer.
1219 * Then nuke it from the inode, and add the new buffer to the inode.
1220 * Don't want xfs_idata_realloc copying the data here.
1222 oldsize = dp->i_df.if_bytes;
1223 buf = kmem_alloc(oldsize, KM_SLEEP);
1224 oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1225 ASSERT(oldsfp->i8count == 0);
1226 memcpy(buf, oldsfp, oldsize);
1228 * Compute the new inode size.
1232 (oldsfp->count + 1) *
1233 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1234 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1235 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1237 * Reset our pointers, the data has moved.
1239 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1240 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1242 * Fill in the new header.
1244 sfp->count = oldsfp->count;
1246 xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
1248 * Copy the entries field by field.
1250 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1251 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1253 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
1254 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
1255 sfep->namelen = oldsfep->namelen;
1256 sfep->offset = oldsfep->offset;
1257 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1258 xfs_dir3_sfe_put_ino(mp, sfp, sfep,
1259 xfs_dir3_sfe_get_ino(mp, oldsfp, oldsfep));
1260 xfs_dir3_sfe_put_ftype(mp, sfp, sfep,
1261 xfs_dir3_sfe_get_ftype(mp, oldsfp, oldsfep));
1264 * Clean up the inode.
1267 dp->i_d.di_size = newsize;
1268 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1270 #endif /* XFS_BIG_INUMS */