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"
24 #include "xfs_mount.h"
25 #include "xfs_da_format.h"
26 #include "xfs_da_btree.h"
27 #include "xfs_inode.h"
28 #include "xfs_trans.h"
29 #include "xfs_inode_item.h"
30 #include "xfs_error.h"
32 #include "xfs_dir2_priv.h"
33 #include "xfs_trace.h"
36 * Prototypes for internal functions.
38 static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
39 xfs_dir2_sf_entry_t *sfep,
40 xfs_dir2_data_aoff_t offset,
42 static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
44 static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
45 xfs_dir2_sf_entry_t **sfepp,
46 xfs_dir2_data_aoff_t *offsetp);
48 static void xfs_dir2_sf_check(xfs_da_args_t *args);
50 #define xfs_dir2_sf_check(args)
53 static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
54 static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
57 * Given a block directory (dp/block), calculate its size as a shortform (sf)
58 * directory and a header for the sf directory, if it will fit it the
59 * space currently present in the inode. If it won't fit, the output
60 * size is too big (but not accurate).
62 int /* size for sf form */
63 xfs_dir2_block_sfsize(
64 xfs_inode_t *dp, /* incore inode pointer */
65 xfs_dir2_data_hdr_t *hdr, /* block directory data */
66 xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
68 xfs_dir2_dataptr_t addr; /* data entry address */
69 xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
70 xfs_dir2_block_tail_t *btp; /* tail area of the block */
71 int count; /* shortform entry count */
72 xfs_dir2_data_entry_t *dep; /* data entry in the block */
73 int i; /* block entry index */
74 int i8count; /* count of big-inode entries */
75 int isdot; /* entry is "." */
76 int isdotdot; /* entry is ".." */
77 xfs_mount_t *mp; /* mount structure pointer */
78 int namelen; /* total name bytes */
79 xfs_ino_t parent = 0; /* parent inode number */
80 int size=0; /* total computed size */
82 struct xfs_da_geometry *geo;
88 * if there is a filetype field, add the extra byte to the namelen
89 * for each entry that we see.
91 has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0;
93 count = i8count = namelen = 0;
94 btp = xfs_dir2_block_tail_p(geo, hdr);
95 blp = xfs_dir2_block_leaf_p(btp);
98 * Iterate over the block's data entries by using the leaf pointers.
100 for (i = 0; i < be32_to_cpu(btp->count); i++) {
101 if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
104 * Calculate the pointer to the entry at hand.
106 dep = (xfs_dir2_data_entry_t *)((char *)hdr +
107 xfs_dir2_dataptr_to_off(geo, addr));
109 * Detect . and .., so we can special-case them.
110 * . is not included in sf directories.
111 * .. is included by just the parent inode number.
113 isdot = dep->namelen == 1 && dep->name[0] == '.';
116 dep->name[0] == '.' && dep->name[1] == '.';
119 i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
121 /* take into account the file type field */
122 if (!isdot && !isdotdot) {
124 namelen += dep->namelen + has_ftype;
126 parent = be64_to_cpu(dep->inumber);
128 * Calculate the new size, see if we should give up yet.
130 size = xfs_dir2_sf_hdr_size(i8count) + /* header */
131 count + /* namelen */
132 count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
134 (i8count ? /* inumber */
135 (uint)sizeof(xfs_dir2_ino8_t) * count :
136 (uint)sizeof(xfs_dir2_ino4_t) * count);
137 if (size > XFS_IFORK_DSIZE(dp))
138 return size; /* size value is a failure */
141 * Create the output header, if it worked.
144 sfhp->i8count = i8count;
145 dp->d_ops->sf_put_parent_ino(sfhp, parent);
150 * Convert a block format directory to shortform.
151 * Caller has already checked that it will fit, and built us a header.
154 xfs_dir2_block_to_sf(
155 xfs_da_args_t *args, /* operation arguments */
157 int size, /* shortform directory size */
158 xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
160 xfs_dir2_data_hdr_t *hdr; /* block header */
161 xfs_dir2_block_tail_t *btp; /* block tail pointer */
162 xfs_dir2_data_entry_t *dep; /* data entry pointer */
163 xfs_inode_t *dp; /* incore directory inode */
164 xfs_dir2_data_unused_t *dup; /* unused data pointer */
165 char *endptr; /* end of data entries */
166 int error; /* error return value */
167 int logflags; /* inode logging flags */
168 xfs_mount_t *mp; /* filesystem mount point */
169 char *ptr; /* current data pointer */
170 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
171 xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */
172 xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */
174 trace_xfs_dir2_block_to_sf(args);
180 * allocate a temporary destination buffer the size of the inode
181 * to format the data into. Once we have formatted the data, we
182 * can free the block and copy the formatted data into the inode literal
185 dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP);
189 * Copy the header into the newly allocate local space.
191 sfp = (xfs_dir2_sf_hdr_t *)dst;
192 memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
195 * Set up to loop over the block's entries.
197 btp = xfs_dir2_block_tail_p(args->geo, hdr);
198 ptr = (char *)dp->d_ops->data_entry_p(hdr);
199 endptr = (char *)xfs_dir2_block_leaf_p(btp);
200 sfep = xfs_dir2_sf_firstentry(sfp);
202 * Loop over the active and unused entries.
203 * Stop when we reach the leaf/tail portion of the block.
205 while (ptr < endptr) {
207 * If it's unused, just skip over it.
209 dup = (xfs_dir2_data_unused_t *)ptr;
210 if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
211 ptr += be16_to_cpu(dup->length);
214 dep = (xfs_dir2_data_entry_t *)ptr;
218 if (dep->namelen == 1 && dep->name[0] == '.')
219 ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
221 * Skip .., but make sure the inode number is right.
223 else if (dep->namelen == 2 &&
224 dep->name[0] == '.' && dep->name[1] == '.')
225 ASSERT(be64_to_cpu(dep->inumber) ==
226 dp->d_ops->sf_get_parent_ino(sfp));
228 * Normal entry, copy it into shortform.
231 sfep->namelen = dep->namelen;
232 xfs_dir2_sf_put_offset(sfep,
233 (xfs_dir2_data_aoff_t)
234 ((char *)dep - (char *)hdr));
235 memcpy(sfep->name, dep->name, dep->namelen);
236 dp->d_ops->sf_put_ino(sfp, sfep,
237 be64_to_cpu(dep->inumber));
238 dp->d_ops->sf_put_ftype(sfep,
239 dp->d_ops->data_get_ftype(dep));
241 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
243 ptr += dp->d_ops->data_entsize(dep->namelen);
245 ASSERT((char *)sfep - (char *)sfp == size);
247 /* now we are done with the block, we can shrink the inode */
248 logflags = XFS_ILOG_CORE;
249 error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
251 ASSERT(error != -ENOSPC);
256 * The buffer is now unconditionally gone, whether
257 * xfs_dir2_shrink_inode worked or not.
259 * Convert the inode to local format and copy the data in.
261 dp->i_df.if_flags &= ~XFS_IFEXTENTS;
262 dp->i_df.if_flags |= XFS_IFINLINE;
263 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
264 ASSERT(dp->i_df.if_bytes == 0);
265 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
267 logflags |= XFS_ILOG_DDATA;
268 memcpy(dp->i_df.if_u1.if_data, dst, size);
269 dp->i_d.di_size = size;
270 xfs_dir2_sf_check(args);
272 xfs_trans_log_inode(args->trans, dp, logflags);
278 * Add a name to a shortform directory.
279 * There are two algorithms, "easy" and "hard" which we decide on
280 * before changing anything.
281 * Convert to block form if necessary, if the new entry won't fit.
285 xfs_da_args_t *args) /* operation arguments */
287 xfs_inode_t *dp; /* incore directory inode */
288 int error; /* error return value */
289 int incr_isize; /* total change in size */
290 int new_isize; /* di_size after adding name */
291 int objchange; /* changing to 8-byte inodes */
292 xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
293 int pick; /* which algorithm to use */
294 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
295 xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
297 trace_xfs_dir2_sf_addname(args);
299 ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT);
301 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
303 * Make sure the shortform value has some of its header.
305 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
306 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
309 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
310 ASSERT(dp->i_df.if_u1.if_data != NULL);
311 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
312 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
314 * Compute entry (and change in) size.
316 incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen);
320 * Do we have to change to 8 byte inodes?
322 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
324 * Yes, adjust the inode size. old count + (parent + new)
328 ((uint)sizeof(xfs_dir2_ino8_t) -
329 (uint)sizeof(xfs_dir2_ino4_t));
333 new_isize = (int)dp->i_d.di_size + incr_isize;
335 * Won't fit as shortform any more (due to size),
336 * or the pick routine says it won't (due to offset values).
338 if (new_isize > XFS_IFORK_DSIZE(dp) ||
340 xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
342 * Just checking or no space reservation, it doesn't fit.
344 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
347 * Convert to block form then add the name.
349 error = xfs_dir2_sf_to_block(args);
352 return xfs_dir2_block_addname(args);
355 * Just checking, it fits.
357 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
360 * Do it the easy way - just add it at the end.
363 xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
365 * Do it the hard way - look for a place to insert the new entry.
366 * Convert to 8 byte inode numbers first if necessary.
371 xfs_dir2_sf_toino8(args);
372 xfs_dir2_sf_addname_hard(args, objchange, new_isize);
374 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
379 * Add the new entry the "easy" way.
380 * This is copying the old directory and adding the new entry at the end.
381 * Since it's sorted by "offset" we need room after the last offset
382 * that's already there, and then room to convert to a block directory.
383 * This is already checked by the pick routine.
386 xfs_dir2_sf_addname_easy(
387 xfs_da_args_t *args, /* operation arguments */
388 xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
389 xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
390 int new_isize) /* new directory size */
392 int byteoff; /* byte offset in sf dir */
393 xfs_inode_t *dp; /* incore directory inode */
394 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
398 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
399 byteoff = (int)((char *)sfep - (char *)sfp);
401 * Grow the in-inode space.
403 xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen),
406 * Need to set up again due to realloc of the inode data.
408 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
409 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
411 * Fill in the new entry.
413 sfep->namelen = args->namelen;
414 xfs_dir2_sf_put_offset(sfep, offset);
415 memcpy(sfep->name, args->name, sfep->namelen);
416 dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
417 dp->d_ops->sf_put_ftype(sfep, args->filetype);
420 * Update the header and inode.
423 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
425 dp->i_d.di_size = new_isize;
426 xfs_dir2_sf_check(args);
430 * Add the new entry the "hard" way.
431 * The caller has already converted to 8 byte inode numbers if necessary,
432 * in which case we need to leave the i8count at 1.
433 * Find a hole that the new entry will fit into, and copy
434 * the first part of the entries, the new entry, and the last part of
439 xfs_dir2_sf_addname_hard(
440 xfs_da_args_t *args, /* operation arguments */
441 int objchange, /* changing inode number size */
442 int new_isize) /* new directory size */
444 int add_datasize; /* data size need for new ent */
445 char *buf; /* buffer for old */
446 xfs_inode_t *dp; /* incore directory inode */
447 int eof; /* reached end of old dir */
448 int nbytes; /* temp for byte copies */
449 xfs_dir2_data_aoff_t new_offset; /* next offset value */
450 xfs_dir2_data_aoff_t offset; /* current offset value */
451 int old_isize; /* previous di_size */
452 xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
453 xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */
454 xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
455 xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
456 struct xfs_mount *mp;
459 * Copy the old directory to the stack buffer.
464 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
465 old_isize = (int)dp->i_d.di_size;
466 buf = kmem_alloc(old_isize, KM_SLEEP);
467 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
468 memcpy(oldsfp, sfp, old_isize);
470 * Loop over the old directory finding the place we're going
471 * to insert the new entry.
472 * If it's going to end up at the end then oldsfep will point there.
474 for (offset = dp->d_ops->data_first_offset,
475 oldsfep = xfs_dir2_sf_firstentry(oldsfp),
476 add_datasize = dp->d_ops->data_entsize(args->namelen),
477 eof = (char *)oldsfep == &buf[old_isize];
479 offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen),
480 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep),
481 eof = (char *)oldsfep == &buf[old_isize]) {
482 new_offset = xfs_dir2_sf_get_offset(oldsfep);
483 if (offset + add_datasize <= new_offset)
487 * Get rid of the old directory, then allocate space for
488 * the new one. We do this so xfs_idata_realloc won't copy
491 xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
492 xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
494 * Reset the pointer since the buffer was reallocated.
496 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
498 * Copy the first part of the directory, including the header.
500 nbytes = (int)((char *)oldsfep - (char *)oldsfp);
501 memcpy(sfp, oldsfp, nbytes);
502 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
504 * Fill in the new entry, and update the header counts.
506 sfep->namelen = args->namelen;
507 xfs_dir2_sf_put_offset(sfep, offset);
508 memcpy(sfep->name, args->name, sfep->namelen);
509 dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
510 dp->d_ops->sf_put_ftype(sfep, args->filetype);
512 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
515 * If there's more left to copy, do that.
518 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
519 memcpy(sfep, oldsfep, old_isize - nbytes);
522 dp->i_d.di_size = new_isize;
523 xfs_dir2_sf_check(args);
527 * Decide if the new entry will fit at all.
528 * If it will fit, pick between adding the new entry to the end (easy)
529 * or somewhere else (hard).
530 * Return 0 (won't fit), 1 (easy), 2 (hard).
533 static int /* pick result */
534 xfs_dir2_sf_addname_pick(
535 xfs_da_args_t *args, /* operation arguments */
536 int objchange, /* inode # size changes */
537 xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
538 xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
540 xfs_inode_t *dp; /* incore directory inode */
541 int holefit; /* found hole it will fit in */
542 int i; /* entry number */
543 xfs_mount_t *mp; /* filesystem mount point */
544 xfs_dir2_data_aoff_t offset; /* data block offset */
545 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
546 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
547 int size; /* entry's data size */
548 int used; /* data bytes used */
553 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
554 size = dp->d_ops->data_entsize(args->namelen);
555 offset = dp->d_ops->data_first_offset;
556 sfep = xfs_dir2_sf_firstentry(sfp);
559 * Loop over sf entries.
560 * Keep track of data offset and whether we've seen a place
561 * to insert the new entry.
563 for (i = 0; i < sfp->count; i++) {
565 holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
566 offset = xfs_dir2_sf_get_offset(sfep) +
567 dp->d_ops->data_entsize(sfep->namelen);
568 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
571 * Calculate data bytes used excluding the new entry, if this
572 * was a data block (block form directory).
575 (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
576 (uint)sizeof(xfs_dir2_block_tail_t);
578 * If it won't fit in a block form then we can't insert it,
579 * we'll go back, convert to block, then try the insert and convert
582 if (used + (holefit ? 0 : size) > args->geo->blksize)
585 * If changing the inode number size, do it the hard way.
590 * If it won't fit at the end then do it the hard way (use the hole).
592 if (used + size > args->geo->blksize)
595 * Do it the easy way.
604 * Check consistency of shortform directory, assert if bad.
608 xfs_da_args_t *args) /* operation arguments */
610 xfs_inode_t *dp; /* incore directory inode */
611 int i; /* entry number */
612 int i8count; /* number of big inode#s */
613 xfs_ino_t ino; /* entry inode number */
614 int offset; /* data offset */
615 xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
616 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
617 struct xfs_mount *mp;
622 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
623 offset = dp->d_ops->data_first_offset;
624 ino = dp->d_ops->sf_get_parent_ino(sfp);
625 i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
627 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
629 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
630 ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
631 ino = dp->d_ops->sf_get_ino(sfp, sfep);
632 i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
634 xfs_dir2_sf_get_offset(sfep) +
635 dp->d_ops->data_entsize(sfep->namelen);
636 ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX);
638 ASSERT(i8count == sfp->i8count);
639 ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
641 (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
642 (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize);
647 * Create a new (shortform) directory.
649 int /* error, always 0 */
651 xfs_da_args_t *args, /* operation arguments */
652 xfs_ino_t pino) /* parent inode number */
654 xfs_inode_t *dp; /* incore directory inode */
655 int i8count; /* parent inode is an 8-byte number */
656 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
657 int size; /* directory size */
659 trace_xfs_dir2_sf_create(args);
664 ASSERT(dp->i_d.di_size == 0);
666 * If it's currently a zero-length extent file,
667 * convert it to local format.
669 if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
670 dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
671 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
672 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
673 dp->i_df.if_flags |= XFS_IFINLINE;
675 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
676 ASSERT(dp->i_df.if_bytes == 0);
677 i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
678 size = xfs_dir2_sf_hdr_size(i8count);
680 * Make a buffer for the data.
682 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
684 * Fill in the header,
686 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
687 sfp->i8count = i8count;
689 * Now can put in the inode number, since i8count is set.
691 dp->d_ops->sf_put_parent_ino(sfp, pino);
693 dp->i_d.di_size = size;
694 xfs_dir2_sf_check(args);
695 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
700 * Lookup an entry in a shortform directory.
701 * Returns EEXIST if found, ENOENT if not found.
705 xfs_da_args_t *args) /* operation arguments */
707 xfs_inode_t *dp; /* incore directory inode */
708 int i; /* entry index */
710 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
711 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
712 enum xfs_dacmp cmp; /* comparison result */
713 xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
715 trace_xfs_dir2_sf_lookup(args);
717 xfs_dir2_sf_check(args);
720 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
722 * Bail out if the directory is way too short.
724 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
725 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
728 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
729 ASSERT(dp->i_df.if_u1.if_data != NULL);
730 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
731 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
735 if (args->namelen == 1 && args->name[0] == '.') {
736 args->inumber = dp->i_ino;
737 args->cmpresult = XFS_CMP_EXACT;
738 args->filetype = XFS_DIR3_FT_DIR;
742 * Special case for ..
744 if (args->namelen == 2 &&
745 args->name[0] == '.' && args->name[1] == '.') {
746 args->inumber = dp->d_ops->sf_get_parent_ino(sfp);
747 args->cmpresult = XFS_CMP_EXACT;
748 args->filetype = XFS_DIR3_FT_DIR;
752 * Loop over all the entries trying to match ours.
755 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
756 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
758 * Compare name and if it's an exact match, return the inode
759 * number. If it's the first case-insensitive match, store the
760 * inode number and continue looking for an exact match.
762 cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name,
764 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
765 args->cmpresult = cmp;
766 args->inumber = dp->d_ops->sf_get_ino(sfp, sfep);
767 args->filetype = dp->d_ops->sf_get_ftype(sfep);
768 if (cmp == XFS_CMP_EXACT)
773 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
775 * Here, we can only be doing a lookup (not a rename or replace).
776 * If a case-insensitive match was not found, return -ENOENT.
780 /* otherwise process the CI match as required by the caller */
781 error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
786 * Remove an entry from a shortform directory.
789 xfs_dir2_sf_removename(
792 int byteoff; /* offset of removed entry */
793 xfs_inode_t *dp; /* incore directory inode */
794 int entsize; /* this entry's size */
795 int i; /* shortform entry index */
796 int newsize; /* new inode size */
797 int oldsize; /* old inode size */
798 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
799 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
801 trace_xfs_dir2_sf_removename(args);
805 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
806 oldsize = (int)dp->i_d.di_size;
808 * Bail out if the directory is way too short.
810 if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
811 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
814 ASSERT(dp->i_df.if_bytes == oldsize);
815 ASSERT(dp->i_df.if_u1.if_data != NULL);
816 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
817 ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count));
819 * Loop over the old directory entries.
820 * Find the one we're deleting.
822 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
823 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
824 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
826 ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) ==
839 byteoff = (int)((char *)sfep - (char *)sfp);
840 entsize = dp->d_ops->sf_entsize(sfp, args->namelen);
841 newsize = oldsize - entsize;
843 * Copy the part if any after the removed entry, sliding it down.
845 if (byteoff + entsize < oldsize)
846 memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
847 oldsize - (byteoff + entsize));
849 * Fix up the header and file size.
852 dp->i_d.di_size = newsize;
854 * Reallocate, making it smaller.
856 xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
857 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
859 * Are we changing inode number size?
861 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
862 if (sfp->i8count == 1)
863 xfs_dir2_sf_toino4(args);
867 xfs_dir2_sf_check(args);
868 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
873 * Replace the inode number of an entry in a shortform directory.
877 xfs_da_args_t *args) /* operation arguments */
879 xfs_inode_t *dp; /* incore directory inode */
880 int i; /* entry index */
881 xfs_ino_t ino=0; /* entry old inode number */
882 int i8elevated; /* sf_toino8 set i8count=1 */
883 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
884 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
886 trace_xfs_dir2_sf_replace(args);
890 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
892 * Bail out if the shortform directory is way too small.
894 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
895 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
898 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
899 ASSERT(dp->i_df.if_u1.if_data != NULL);
900 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
901 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
904 * New inode number is large, and need to convert to 8-byte inodes.
906 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
907 int error; /* error return value */
908 int newsize; /* new inode size */
913 ((uint)sizeof(xfs_dir2_ino8_t) -
914 (uint)sizeof(xfs_dir2_ino4_t));
916 * Won't fit as shortform, convert to block then do replace.
918 if (newsize > XFS_IFORK_DSIZE(dp)) {
919 error = xfs_dir2_sf_to_block(args);
923 return xfs_dir2_block_replace(args);
926 * Still fits, convert to 8-byte now.
928 xfs_dir2_sf_toino8(args);
930 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
934 ASSERT(args->namelen != 1 || args->name[0] != '.');
936 * Replace ..'s entry.
938 if (args->namelen == 2 &&
939 args->name[0] == '.' && args->name[1] == '.') {
940 ino = dp->d_ops->sf_get_parent_ino(sfp);
941 ASSERT(args->inumber != ino);
942 dp->d_ops->sf_put_parent_ino(sfp, args->inumber);
945 * Normal entry, look for the name.
948 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
949 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
950 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
952 ino = dp->d_ops->sf_get_ino(sfp, sfep);
953 ASSERT(args->inumber != ino);
954 dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
955 dp->d_ops->sf_put_ftype(sfep, args->filetype);
962 if (i == sfp->count) {
963 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
965 xfs_dir2_sf_toino4(args);
970 * See if the old number was large, the new number is small.
972 if (ino > XFS_DIR2_MAX_SHORT_INUM &&
973 args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
975 * And the old count was one, so need to convert to small.
977 if (sfp->i8count == 1)
978 xfs_dir2_sf_toino4(args);
983 * See if the old number was small, the new number is large.
985 if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
986 args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
988 * add to the i8count unless we just converted to 8-byte
989 * inodes (which does an implied i8count = 1)
991 ASSERT(sfp->i8count != 0);
995 xfs_dir2_sf_check(args);
996 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1001 * Convert from 8-byte inode numbers to 4-byte inode numbers.
1002 * The last 8-byte inode number is gone, but the count is still 1.
1006 xfs_da_args_t *args) /* operation arguments */
1008 char *buf; /* old dir's buffer */
1009 xfs_inode_t *dp; /* incore directory inode */
1010 int i; /* entry index */
1011 int newsize; /* new inode size */
1012 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1013 xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1014 int oldsize; /* old inode size */
1015 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1016 xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1017 struct xfs_mount *mp;
1019 trace_xfs_dir2_sf_toino4(args);
1025 * Copy the old directory to the buffer.
1026 * Then nuke it from the inode, and add the new buffer to the inode.
1027 * Don't want xfs_idata_realloc copying the data here.
1029 oldsize = dp->i_df.if_bytes;
1030 buf = kmem_alloc(oldsize, KM_SLEEP);
1031 oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1032 ASSERT(oldsfp->i8count == 1);
1033 memcpy(buf, oldsfp, oldsize);
1035 * Compute the new inode size.
1039 (oldsfp->count + 1) *
1040 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1041 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1042 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1044 * Reset our pointers, the data has moved.
1046 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1047 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1049 * Fill in the new header.
1051 sfp->count = oldsfp->count;
1053 dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp));
1055 * Copy the entries field by field.
1057 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1058 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1060 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
1061 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
1062 sfep->namelen = oldsfep->namelen;
1063 sfep->offset = oldsfep->offset;
1064 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1065 dp->d_ops->sf_put_ino(sfp, sfep,
1066 dp->d_ops->sf_get_ino(oldsfp, oldsfep));
1067 dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep));
1070 * Clean up the inode.
1073 dp->i_d.di_size = newsize;
1074 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1078 * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers.
1079 * The new entry w/ an 8-byte inode number is not there yet; we leave with
1080 * i8count set to 1, but no corresponding 8-byte entry.
1084 xfs_da_args_t *args) /* operation arguments */
1086 char *buf; /* old dir's buffer */
1087 xfs_inode_t *dp; /* incore directory inode */
1088 int i; /* entry index */
1089 int newsize; /* new inode size */
1090 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1091 xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1092 int oldsize; /* old inode size */
1093 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1094 xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1095 struct xfs_mount *mp;
1097 trace_xfs_dir2_sf_toino8(args);
1103 * Copy the old directory to the buffer.
1104 * Then nuke it from the inode, and add the new buffer to the inode.
1105 * Don't want xfs_idata_realloc copying the data here.
1107 oldsize = dp->i_df.if_bytes;
1108 buf = kmem_alloc(oldsize, KM_SLEEP);
1109 oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1110 ASSERT(oldsfp->i8count == 0);
1111 memcpy(buf, oldsfp, oldsize);
1113 * Compute the new inode size (nb: entry count + 1 for parent)
1117 (oldsfp->count + 1) *
1118 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1119 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1120 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1122 * Reset our pointers, the data has moved.
1124 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1125 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1127 * Fill in the new header.
1129 sfp->count = oldsfp->count;
1131 dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp));
1133 * Copy the entries field by field.
1135 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1136 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1138 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
1139 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
1140 sfep->namelen = oldsfep->namelen;
1141 sfep->offset = oldsfep->offset;
1142 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1143 dp->d_ops->sf_put_ino(sfp, sfep,
1144 dp->d_ops->sf_get_ino(oldsfp, oldsfep));
1145 dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep));
1148 * Clean up the inode.
1151 dp->i_d.di_size = newsize;
1152 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);