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"
23 #include "xfs_trans.h"
26 #include "xfs_dmapi.h"
27 #include "xfs_mount.h"
28 #include "xfs_da_btree.h"
29 #include "xfs_bmap_btree.h"
30 #include "xfs_dir2_sf.h"
31 #include "xfs_attr_sf.h"
32 #include "xfs_dinode.h"
33 #include "xfs_inode.h"
34 #include "xfs_inode_item.h"
35 #include "xfs_error.h"
36 #include "xfs_dir2_data.h"
37 #include "xfs_dir2_leaf.h"
38 #include "xfs_dir2_block.h"
39 #include "xfs_dir2_trace.h"
42 * Prototypes for internal functions.
44 static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
45 xfs_dir2_sf_entry_t *sfep,
46 xfs_dir2_data_aoff_t offset,
48 static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
50 static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
51 xfs_dir2_sf_entry_t **sfepp,
52 xfs_dir2_data_aoff_t *offsetp);
54 static void xfs_dir2_sf_check(xfs_da_args_t *args);
56 #define xfs_dir2_sf_check(args)
59 static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
60 static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
61 #endif /* XFS_BIG_INUMS */
64 * Given a block directory (dp/block), calculate its size as a shortform (sf)
65 * directory and a header for the sf directory, if it will fit it the
66 * space currently present in the inode. If it won't fit, the output
67 * size is too big (but not accurate).
69 int /* size for sf form */
70 xfs_dir2_block_sfsize(
71 xfs_inode_t *dp, /* incore inode pointer */
72 xfs_dir2_block_t *block, /* block directory data */
73 xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
75 xfs_dir2_dataptr_t addr; /* data entry address */
76 xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
77 xfs_dir2_block_tail_t *btp; /* tail area of the block */
78 int count; /* shortform entry count */
79 xfs_dir2_data_entry_t *dep; /* data entry in the block */
80 int i; /* block entry index */
81 int i8count; /* count of big-inode entries */
82 int isdot; /* entry is "." */
83 int isdotdot; /* entry is ".." */
84 xfs_mount_t *mp; /* mount structure pointer */
85 int namelen; /* total name bytes */
86 xfs_ino_t parent = 0; /* parent inode number */
87 int size=0; /* total computed size */
91 count = i8count = namelen = 0;
92 btp = xfs_dir2_block_tail_p(mp, block);
93 blp = xfs_dir2_block_leaf_p(btp);
96 * Iterate over the block's data entries by using the leaf pointers.
98 for (i = 0; i < be32_to_cpu(btp->count); i++) {
99 if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
102 * Calculate the pointer to the entry at hand.
104 dep = (xfs_dir2_data_entry_t *)
105 ((char *)block + xfs_dir2_dataptr_to_off(mp, addr));
107 * Detect . and .., so we can special-case them.
108 * . is not included in sf directories.
109 * .. is included by just the parent inode number.
111 isdot = dep->namelen == 1 && dep->name[0] == '.';
114 dep->name[0] == '.' && dep->name[1] == '.';
117 i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
119 if (!isdot && !isdotdot) {
121 namelen += dep->namelen;
123 parent = be64_to_cpu(dep->inumber);
125 * Calculate the new size, see if we should give up yet.
127 size = xfs_dir2_sf_hdr_size(i8count) + /* header */
128 count + /* namelen */
129 count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
131 (i8count ? /* inumber */
132 (uint)sizeof(xfs_dir2_ino8_t) * count :
133 (uint)sizeof(xfs_dir2_ino4_t) * count);
134 if (size > XFS_IFORK_DSIZE(dp))
135 return size; /* size value is a failure */
138 * Create the output header, if it worked.
141 sfhp->i8count = i8count;
142 xfs_dir2_sf_put_inumber((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent);
147 * Convert a block format directory to shortform.
148 * Caller has already checked that it will fit, and built us a header.
151 xfs_dir2_block_to_sf(
152 xfs_da_args_t *args, /* operation arguments */
153 xfs_dabuf_t *bp, /* block buffer */
154 int size, /* shortform directory size */
155 xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
157 xfs_dir2_block_t *block; /* block structure */
158 xfs_dir2_block_tail_t *btp; /* block tail pointer */
159 xfs_dir2_data_entry_t *dep; /* data entry pointer */
160 xfs_inode_t *dp; /* incore directory inode */
161 xfs_dir2_data_unused_t *dup; /* unused data pointer */
162 char *endptr; /* end of data entries */
163 int error; /* error return value */
164 int logflags; /* inode logging flags */
165 xfs_mount_t *mp; /* filesystem mount point */
166 char *ptr; /* current data pointer */
167 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
168 xfs_dir2_sf_t *sfp; /* shortform structure */
171 xfs_dir2_trace_args_sb("block_to_sf", args, size, bp);
176 * Make a copy of the block data, so we can shrink the inode
177 * and add local data.
179 block = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
180 memcpy(block, bp->data, mp->m_dirblksize);
181 logflags = XFS_ILOG_CORE;
182 if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
183 ASSERT(error != ENOSPC);
187 * The buffer is now unconditionally gone, whether
188 * xfs_dir2_shrink_inode worked or not.
190 * Convert the inode to local format.
192 dp->i_df.if_flags &= ~XFS_IFEXTENTS;
193 dp->i_df.if_flags |= XFS_IFINLINE;
194 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
195 ASSERT(dp->i_df.if_bytes == 0);
196 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
197 logflags |= XFS_ILOG_DDATA;
199 * Copy the header into the newly allocate local space.
201 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
202 memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
203 dp->i_d.di_size = size;
205 * Set up to loop over the block's entries.
207 btp = xfs_dir2_block_tail_p(mp, block);
208 ptr = (char *)block->u;
209 endptr = (char *)xfs_dir2_block_leaf_p(btp);
210 sfep = xfs_dir2_sf_firstentry(sfp);
212 * Loop over the active and unused entries.
213 * Stop when we reach the leaf/tail portion of the block.
215 while (ptr < endptr) {
217 * If it's unused, just skip over it.
219 dup = (xfs_dir2_data_unused_t *)ptr;
220 if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
221 ptr += be16_to_cpu(dup->length);
224 dep = (xfs_dir2_data_entry_t *)ptr;
228 if (dep->namelen == 1 && dep->name[0] == '.')
229 ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
231 * Skip .., but make sure the inode number is right.
233 else if (dep->namelen == 2 &&
234 dep->name[0] == '.' && dep->name[1] == '.')
235 ASSERT(be64_to_cpu(dep->inumber) ==
236 xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent));
238 * Normal entry, copy it into shortform.
241 sfep->namelen = dep->namelen;
242 xfs_dir2_sf_put_offset(sfep,
243 (xfs_dir2_data_aoff_t)
244 ((char *)dep - (char *)block));
245 memcpy(sfep->name, dep->name, dep->namelen);
246 temp = be64_to_cpu(dep->inumber);
247 xfs_dir2_sf_put_inumber(sfp, &temp,
248 xfs_dir2_sf_inumberp(sfep));
249 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
251 ptr += xfs_dir2_data_entsize(dep->namelen);
253 ASSERT((char *)sfep - (char *)sfp == size);
254 xfs_dir2_sf_check(args);
256 xfs_trans_log_inode(args->trans, dp, logflags);
257 kmem_free(block, mp->m_dirblksize);
262 * Add a name to a shortform directory.
263 * There are two algorithms, "easy" and "hard" which we decide on
264 * before changing anything.
265 * Convert to block form if necessary, if the new entry won't fit.
269 xfs_da_args_t *args) /* operation arguments */
271 int add_entsize; /* size of the new entry */
272 xfs_inode_t *dp; /* incore directory inode */
273 int error; /* error return value */
274 int incr_isize; /* total change in size */
275 int new_isize; /* di_size after adding name */
276 int objchange; /* changing to 8-byte inodes */
277 xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
278 int old_isize; /* di_size before adding name */
279 int pick; /* which algorithm to use */
280 xfs_dir2_sf_t *sfp; /* shortform structure */
281 xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
283 xfs_dir2_trace_args("sf_addname", args);
284 ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
286 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
288 * Make sure the shortform value has some of its header.
290 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
291 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
292 return XFS_ERROR(EIO);
294 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
295 ASSERT(dp->i_df.if_u1.if_data != NULL);
296 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
297 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
299 * Compute entry (and change in) size.
301 add_entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
302 incr_isize = add_entsize;
306 * Do we have to change to 8 byte inodes?
308 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
310 * Yes, adjust the entry size and the total size.
313 (uint)sizeof(xfs_dir2_ino8_t) -
314 (uint)sizeof(xfs_dir2_ino4_t);
316 (sfp->hdr.count + 2) *
317 ((uint)sizeof(xfs_dir2_ino8_t) -
318 (uint)sizeof(xfs_dir2_ino4_t));
322 old_isize = (int)dp->i_d.di_size;
323 new_isize = old_isize + incr_isize;
325 * Won't fit as shortform any more (due to size),
326 * or the pick routine says it won't (due to offset values).
328 if (new_isize > XFS_IFORK_DSIZE(dp) ||
330 xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
332 * Just checking or no space reservation, it doesn't fit.
334 if (args->justcheck || args->total == 0)
335 return XFS_ERROR(ENOSPC);
337 * Convert to block form then add the name.
339 error = xfs_dir2_sf_to_block(args);
342 return xfs_dir2_block_addname(args);
345 * Just checking, it fits.
350 * Do it the easy way - just add it at the end.
353 xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
355 * Do it the hard way - look for a place to insert the new entry.
356 * Convert to 8 byte inode numbers first if necessary.
362 xfs_dir2_sf_toino8(args);
364 xfs_dir2_sf_addname_hard(args, objchange, new_isize);
366 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
371 * Add the new entry the "easy" way.
372 * This is copying the old directory and adding the new entry at the end.
373 * Since it's sorted by "offset" we need room after the last offset
374 * that's already there, and then room to convert to a block directory.
375 * This is already checked by the pick routine.
378 xfs_dir2_sf_addname_easy(
379 xfs_da_args_t *args, /* operation arguments */
380 xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
381 xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
382 int new_isize) /* new directory size */
384 int byteoff; /* byte offset in sf dir */
385 xfs_inode_t *dp; /* incore directory inode */
386 xfs_dir2_sf_t *sfp; /* shortform structure */
390 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
391 byteoff = (int)((char *)sfep - (char *)sfp);
393 * Grow the in-inode space.
395 xfs_idata_realloc(dp, xfs_dir2_sf_entsize_byname(sfp, args->namelen),
398 * Need to set up again due to realloc of the inode data.
400 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
401 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
403 * Fill in the new entry.
405 sfep->namelen = args->namelen;
406 xfs_dir2_sf_put_offset(sfep, offset);
407 memcpy(sfep->name, args->name, sfep->namelen);
408 xfs_dir2_sf_put_inumber(sfp, &args->inumber,
409 xfs_dir2_sf_inumberp(sfep));
411 * Update the header and inode.
415 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
418 dp->i_d.di_size = new_isize;
419 xfs_dir2_sf_check(args);
423 * Add the new entry the "hard" way.
424 * The caller has already converted to 8 byte inode numbers if necessary,
425 * in which case we need to leave the i8count at 1.
426 * Find a hole that the new entry will fit into, and copy
427 * the first part of the entries, the new entry, and the last part of
432 xfs_dir2_sf_addname_hard(
433 xfs_da_args_t *args, /* operation arguments */
434 int objchange, /* changing inode number size */
435 int new_isize) /* new directory size */
437 int add_datasize; /* data size need for new ent */
438 char *buf; /* buffer for old */
439 xfs_inode_t *dp; /* incore directory inode */
440 int eof; /* reached end of old dir */
441 int nbytes; /* temp for byte copies */
442 xfs_dir2_data_aoff_t new_offset; /* next offset value */
443 xfs_dir2_data_aoff_t offset; /* current offset value */
444 int old_isize; /* previous di_size */
445 xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
446 xfs_dir2_sf_t *oldsfp; /* original shortform dir */
447 xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
448 xfs_dir2_sf_t *sfp; /* new shortform dir */
451 * Copy the old directory to the stack buffer.
455 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
456 old_isize = (int)dp->i_d.di_size;
457 buf = kmem_alloc(old_isize, KM_SLEEP);
458 oldsfp = (xfs_dir2_sf_t *)buf;
459 memcpy(oldsfp, sfp, old_isize);
461 * Loop over the old directory finding the place we're going
462 * to insert the new entry.
463 * If it's going to end up at the end then oldsfep will point there.
465 for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
466 oldsfep = xfs_dir2_sf_firstentry(oldsfp),
467 add_datasize = xfs_dir2_data_entsize(args->namelen),
468 eof = (char *)oldsfep == &buf[old_isize];
470 offset = new_offset + xfs_dir2_data_entsize(oldsfep->namelen),
471 oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep),
472 eof = (char *)oldsfep == &buf[old_isize]) {
473 new_offset = xfs_dir2_sf_get_offset(oldsfep);
474 if (offset + add_datasize <= new_offset)
478 * Get rid of the old directory, then allocate space for
479 * the new one. We do this so xfs_idata_realloc won't copy
482 xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
483 xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
485 * Reset the pointer since the buffer was reallocated.
487 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
489 * Copy the first part of the directory, including the header.
491 nbytes = (int)((char *)oldsfep - (char *)oldsfp);
492 memcpy(sfp, oldsfp, nbytes);
493 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
495 * Fill in the new entry, and update the header counts.
497 sfep->namelen = args->namelen;
498 xfs_dir2_sf_put_offset(sfep, offset);
499 memcpy(sfep->name, args->name, sfep->namelen);
500 xfs_dir2_sf_put_inumber(sfp, &args->inumber,
501 xfs_dir2_sf_inumberp(sfep));
504 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
508 * If there's more left to copy, do that.
511 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
512 memcpy(sfep, oldsfep, old_isize - nbytes);
514 kmem_free(buf, old_isize);
515 dp->i_d.di_size = new_isize;
516 xfs_dir2_sf_check(args);
520 * Decide if the new entry will fit at all.
521 * If it will fit, pick between adding the new entry to the end (easy)
522 * or somewhere else (hard).
523 * Return 0 (won't fit), 1 (easy), 2 (hard).
526 static int /* pick result */
527 xfs_dir2_sf_addname_pick(
528 xfs_da_args_t *args, /* operation arguments */
529 int objchange, /* inode # size changes */
530 xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
531 xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
533 xfs_inode_t *dp; /* incore directory inode */
534 int holefit; /* found hole it will fit in */
535 int i; /* entry number */
536 xfs_mount_t *mp; /* filesystem mount point */
537 xfs_dir2_data_aoff_t offset; /* data block offset */
538 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
539 xfs_dir2_sf_t *sfp; /* shortform structure */
540 int size; /* entry's data size */
541 int used; /* data bytes used */
546 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
547 size = xfs_dir2_data_entsize(args->namelen);
548 offset = XFS_DIR2_DATA_FIRST_OFFSET;
549 sfep = xfs_dir2_sf_firstentry(sfp);
552 * Loop over sf entries.
553 * Keep track of data offset and whether we've seen a place
554 * to insert the new entry.
556 for (i = 0; i < sfp->hdr.count; i++) {
558 holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
559 offset = xfs_dir2_sf_get_offset(sfep) +
560 xfs_dir2_data_entsize(sfep->namelen);
561 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
564 * Calculate data bytes used excluding the new entry, if this
565 * was a data block (block form directory).
568 (sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
569 (uint)sizeof(xfs_dir2_block_tail_t);
571 * If it won't fit in a block form then we can't insert it,
572 * we'll go back, convert to block, then try the insert and convert
575 if (used + (holefit ? 0 : size) > mp->m_dirblksize)
578 * If changing the inode number size, do it the hard way.
585 ASSERT(objchange == 0);
588 * If it won't fit at the end then do it the hard way (use the hole).
590 if (used + size > mp->m_dirblksize)
593 * Do it the easy way.
602 * Check consistency of shortform directory, assert if bad.
606 xfs_da_args_t *args) /* operation arguments */
608 xfs_inode_t *dp; /* incore directory inode */
609 int i; /* entry number */
610 int i8count; /* number of big inode#s */
611 xfs_ino_t ino; /* entry inode number */
612 int offset; /* data offset */
613 xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
614 xfs_dir2_sf_t *sfp; /* shortform structure */
618 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
619 offset = XFS_DIR2_DATA_FIRST_OFFSET;
620 ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
621 i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
623 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
625 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
626 ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
627 ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
628 i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
630 xfs_dir2_sf_get_offset(sfep) +
631 xfs_dir2_data_entsize(sfep->namelen);
633 ASSERT(i8count == sfp->hdr.i8count);
634 ASSERT(XFS_BIG_INUMS || i8count == 0);
635 ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
637 (sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
638 (uint)sizeof(xfs_dir2_block_tail_t) <=
639 dp->i_mount->m_dirblksize);
644 * Create a new (shortform) directory.
646 int /* error, always 0 */
648 xfs_da_args_t *args, /* operation arguments */
649 xfs_ino_t pino) /* parent inode number */
651 xfs_inode_t *dp; /* incore directory inode */
652 int i8count; /* parent inode is an 8-byte number */
653 xfs_dir2_sf_t *sfp; /* shortform structure */
654 int size; /* directory size */
656 xfs_dir2_trace_args_i("sf_create", args, pino);
660 ASSERT(dp->i_d.di_size == 0);
662 * If it's currently a zero-length extent file,
663 * convert it to local format.
665 if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
666 dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
667 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
668 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
669 dp->i_df.if_flags |= XFS_IFINLINE;
671 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
672 ASSERT(dp->i_df.if_bytes == 0);
673 i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
674 size = xfs_dir2_sf_hdr_size(i8count);
676 * Make a buffer for the data.
678 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
680 * Fill in the header,
682 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
683 sfp->hdr.i8count = i8count;
685 * Now can put in the inode number, since i8count is set.
687 xfs_dir2_sf_put_inumber(sfp, &pino, &sfp->hdr.parent);
689 dp->i_d.di_size = size;
690 xfs_dir2_sf_check(args);
691 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
696 xfs_dir2_sf_getdents(
697 xfs_inode_t *dp, /* incore directory inode */
698 uio_t *uio, /* caller's buffer control */
699 int *eofp, /* eof reached? (out) */
700 xfs_dirent_t *dbp, /* caller's buffer */
701 xfs_dir2_put_t put) /* abi's formatting function */
703 int error; /* error return value */
704 int i; /* shortform entry number */
705 xfs_mount_t *mp; /* filesystem mount point */
706 xfs_dir2_dataptr_t off; /* current entry's offset */
707 xfs_dir2_put_args_t p; /* arg package for put rtn */
708 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
709 xfs_dir2_sf_t *sfp; /* shortform structure */
710 xfs_off_t dir_offset;
714 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
716 * Give up if the directory is way too short.
718 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
719 ASSERT(XFS_FORCED_SHUTDOWN(mp));
720 return XFS_ERROR(EIO);
723 dir_offset = uio->uio_offset;
725 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
726 ASSERT(dp->i_df.if_u1.if_data != NULL);
728 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
730 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
733 * If the block number in the offset is out of range, we're done.
735 if (xfs_dir2_dataptr_to_db(mp, dir_offset) > mp->m_dirdatablk) {
741 * Set up putargs structure.
747 * Put . entry unless we're starting past it.
750 xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
751 XFS_DIR2_DATA_DOT_OFFSET)) {
752 p.cook = xfs_dir2_db_off_to_dataptr(mp, 0,
753 XFS_DIR2_DATA_DOTDOT_OFFSET);
756 p.ino += mp->m_inoadd;
765 xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
766 XFS_DIR2_DATA_DOT_OFFSET);
772 * Put .. entry unless we're starting past it.
775 xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
776 XFS_DIR2_DATA_DOTDOT_OFFSET)) {
777 p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
778 XFS_DIR2_DATA_FIRST_OFFSET);
779 p.ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
781 p.ino += mp->m_inoadd;
790 xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
791 XFS_DIR2_DATA_DOTDOT_OFFSET);
797 * Loop while there are more entries and put'ing works.
799 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
801 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
803 off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
804 xfs_dir2_sf_get_offset(sfep));
806 if (dir_offset > off)
809 p.namelen = sfep->namelen;
811 p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
812 xfs_dir2_sf_get_offset(sfep) +
813 xfs_dir2_data_entsize(p.namelen));
815 p.ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
817 p.ino += mp->m_inoadd;
819 p.name = (char *)sfep->name;
824 uio->uio_offset = off;
835 xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
841 * Lookup an entry in a shortform directory.
842 * Returns EEXIST if found, ENOENT if not found.
846 xfs_da_args_t *args) /* operation arguments */
848 xfs_inode_t *dp; /* incore directory inode */
849 int i; /* entry index */
850 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
851 xfs_dir2_sf_t *sfp; /* shortform structure */
853 xfs_dir2_trace_args("sf_lookup", args);
854 xfs_dir2_sf_check(args);
857 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
859 * Bail out if the directory is way too short.
861 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
862 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
863 return XFS_ERROR(EIO);
865 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
866 ASSERT(dp->i_df.if_u1.if_data != NULL);
867 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
868 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
872 if (args->namelen == 1 && args->name[0] == '.') {
873 args->inumber = dp->i_ino;
874 return XFS_ERROR(EEXIST);
877 * Special case for ..
879 if (args->namelen == 2 &&
880 args->name[0] == '.' && args->name[1] == '.') {
881 args->inumber = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
882 return XFS_ERROR(EEXIST);
885 * Loop over all the entries trying to match ours.
887 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
889 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
890 if (sfep->namelen == args->namelen &&
891 sfep->name[0] == args->name[0] &&
892 memcmp(args->name, sfep->name, args->namelen) == 0) {
894 xfs_dir2_sf_get_inumber(sfp,
895 xfs_dir2_sf_inumberp(sfep));
896 return XFS_ERROR(EEXIST);
902 ASSERT(args->oknoent);
903 return XFS_ERROR(ENOENT);
907 * Remove an entry from a shortform directory.
910 xfs_dir2_sf_removename(
913 int byteoff; /* offset of removed entry */
914 xfs_inode_t *dp; /* incore directory inode */
915 int entsize; /* this entry's size */
916 int i; /* shortform entry index */
917 int newsize; /* new inode size */
918 int oldsize; /* old inode size */
919 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
920 xfs_dir2_sf_t *sfp; /* shortform structure */
922 xfs_dir2_trace_args("sf_removename", args);
925 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
926 oldsize = (int)dp->i_d.di_size;
928 * Bail out if the directory is way too short.
930 if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
931 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
932 return XFS_ERROR(EIO);
934 ASSERT(dp->i_df.if_bytes == oldsize);
935 ASSERT(dp->i_df.if_u1.if_data != NULL);
936 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
937 ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
939 * Loop over the old directory entries.
940 * Find the one we're deleting.
942 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
944 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
945 if (sfep->namelen == args->namelen &&
946 sfep->name[0] == args->name[0] &&
947 memcmp(sfep->name, args->name, args->namelen) == 0) {
948 ASSERT(xfs_dir2_sf_get_inumber(sfp,
949 xfs_dir2_sf_inumberp(sfep)) ==
957 if (i == sfp->hdr.count) {
958 return XFS_ERROR(ENOENT);
963 byteoff = (int)((char *)sfep - (char *)sfp);
964 entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
965 newsize = oldsize - entsize;
967 * Copy the part if any after the removed entry, sliding it down.
969 if (byteoff + entsize < oldsize)
970 memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
971 oldsize - (byteoff + entsize));
973 * Fix up the header and file size.
976 dp->i_d.di_size = newsize;
978 * Reallocate, making it smaller.
980 xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
981 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
984 * Are we changing inode number size?
986 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
987 if (sfp->hdr.i8count == 1)
988 xfs_dir2_sf_toino4(args);
993 xfs_dir2_sf_check(args);
994 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
999 * Replace the inode number of an entry in a shortform directory.
1002 xfs_dir2_sf_replace(
1003 xfs_da_args_t *args) /* operation arguments */
1005 xfs_inode_t *dp; /* incore directory inode */
1006 int i; /* entry index */
1007 #if XFS_BIG_INUMS || defined(DEBUG)
1008 xfs_ino_t ino=0; /* entry old inode number */
1011 int i8elevated; /* sf_toino8 set i8count=1 */
1013 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
1014 xfs_dir2_sf_t *sfp; /* shortform structure */
1016 xfs_dir2_trace_args("sf_replace", args);
1019 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
1021 * Bail out if the shortform directory is way too small.
1023 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
1024 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
1025 return XFS_ERROR(EIO);
1027 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
1028 ASSERT(dp->i_df.if_u1.if_data != NULL);
1029 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1030 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
1033 * New inode number is large, and need to convert to 8-byte inodes.
1035 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
1036 int error; /* error return value */
1037 int newsize; /* new inode size */
1041 (sfp->hdr.count + 1) *
1042 ((uint)sizeof(xfs_dir2_ino8_t) -
1043 (uint)sizeof(xfs_dir2_ino4_t));
1045 * Won't fit as shortform, convert to block then do replace.
1047 if (newsize > XFS_IFORK_DSIZE(dp)) {
1048 error = xfs_dir2_sf_to_block(args);
1052 return xfs_dir2_block_replace(args);
1055 * Still fits, convert to 8-byte now.
1057 xfs_dir2_sf_toino8(args);
1059 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1063 ASSERT(args->namelen != 1 || args->name[0] != '.');
1065 * Replace ..'s entry.
1067 if (args->namelen == 2 &&
1068 args->name[0] == '.' && args->name[1] == '.') {
1069 #if XFS_BIG_INUMS || defined(DEBUG)
1070 ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
1071 ASSERT(args->inumber != ino);
1073 xfs_dir2_sf_put_inumber(sfp, &args->inumber, &sfp->hdr.parent);
1076 * Normal entry, look for the name.
1079 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
1081 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
1082 if (sfep->namelen == args->namelen &&
1083 sfep->name[0] == args->name[0] &&
1084 memcmp(args->name, sfep->name, args->namelen) == 0) {
1085 #if XFS_BIG_INUMS || defined(DEBUG)
1086 ino = xfs_dir2_sf_get_inumber(sfp,
1087 xfs_dir2_sf_inumberp(sfep));
1088 ASSERT(args->inumber != ino);
1090 xfs_dir2_sf_put_inumber(sfp, &args->inumber,
1091 xfs_dir2_sf_inumberp(sfep));
1098 if (i == sfp->hdr.count) {
1099 ASSERT(args->oknoent);
1102 xfs_dir2_sf_toino4(args);
1104 return XFS_ERROR(ENOENT);
1109 * See if the old number was large, the new number is small.
1111 if (ino > XFS_DIR2_MAX_SHORT_INUM &&
1112 args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
1114 * And the old count was one, so need to convert to small.
1116 if (sfp->hdr.i8count == 1)
1117 xfs_dir2_sf_toino4(args);
1122 * See if the old number was small, the new number is large.
1124 if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
1125 args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1127 * add to the i8count unless we just converted to 8-byte
1128 * inodes (which does an implied i8count = 1)
1130 ASSERT(sfp->hdr.i8count != 0);
1135 xfs_dir2_sf_check(args);
1136 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1142 * Convert from 8-byte inode numbers to 4-byte inode numbers.
1143 * The last 8-byte inode number is gone, but the count is still 1.
1147 xfs_da_args_t *args) /* operation arguments */
1149 char *buf; /* old dir's buffer */
1150 xfs_inode_t *dp; /* incore directory inode */
1151 int i; /* entry index */
1152 xfs_ino_t ino; /* entry inode number */
1153 int newsize; /* new inode size */
1154 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1155 xfs_dir2_sf_t *oldsfp; /* old sf directory */
1156 int oldsize; /* old inode size */
1157 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1158 xfs_dir2_sf_t *sfp; /* new sf directory */
1160 xfs_dir2_trace_args("sf_toino4", args);
1164 * Copy the old directory to the buffer.
1165 * Then nuke it from the inode, and add the new buffer to the inode.
1166 * Don't want xfs_idata_realloc copying the data here.
1168 oldsize = dp->i_df.if_bytes;
1169 buf = kmem_alloc(oldsize, KM_SLEEP);
1170 oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1171 ASSERT(oldsfp->hdr.i8count == 1);
1172 memcpy(buf, oldsfp, oldsize);
1174 * Compute the new inode size.
1178 (oldsfp->hdr.count + 1) *
1179 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1180 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1181 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1183 * Reset our pointers, the data has moved.
1185 oldsfp = (xfs_dir2_sf_t *)buf;
1186 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1188 * Fill in the new header.
1190 sfp->hdr.count = oldsfp->hdr.count;
1191 sfp->hdr.i8count = 0;
1192 ino = xfs_dir2_sf_get_inumber(oldsfp, &oldsfp->hdr.parent);
1193 xfs_dir2_sf_put_inumber(sfp, &ino, &sfp->hdr.parent);
1195 * Copy the entries field by field.
1197 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1198 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1200 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
1201 oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
1202 sfep->namelen = oldsfep->namelen;
1203 sfep->offset = oldsfep->offset;
1204 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1205 ino = xfs_dir2_sf_get_inumber(oldsfp,
1206 xfs_dir2_sf_inumberp(oldsfep));
1207 xfs_dir2_sf_put_inumber(sfp, &ino, xfs_dir2_sf_inumberp(sfep));
1210 * Clean up the inode.
1212 kmem_free(buf, oldsize);
1213 dp->i_d.di_size = newsize;
1214 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1218 * Convert from 4-byte inode numbers to 8-byte inode numbers.
1219 * The new 8-byte inode number is not there yet, we leave with the
1220 * count 1 but no corresponding entry.
1224 xfs_da_args_t *args) /* operation arguments */
1226 char *buf; /* old dir's buffer */
1227 xfs_inode_t *dp; /* incore directory inode */
1228 int i; /* entry index */
1229 xfs_ino_t ino; /* entry inode number */
1230 int newsize; /* new inode size */
1231 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1232 xfs_dir2_sf_t *oldsfp; /* old sf directory */
1233 int oldsize; /* old inode size */
1234 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1235 xfs_dir2_sf_t *sfp; /* new sf directory */
1237 xfs_dir2_trace_args("sf_toino8", args);
1241 * Copy the old directory to the buffer.
1242 * Then nuke it from the inode, and add the new buffer to the inode.
1243 * Don't want xfs_idata_realloc copying the data here.
1245 oldsize = dp->i_df.if_bytes;
1246 buf = kmem_alloc(oldsize, KM_SLEEP);
1247 oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1248 ASSERT(oldsfp->hdr.i8count == 0);
1249 memcpy(buf, oldsfp, oldsize);
1251 * Compute the new inode size.
1255 (oldsfp->hdr.count + 1) *
1256 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1257 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1258 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1260 * Reset our pointers, the data has moved.
1262 oldsfp = (xfs_dir2_sf_t *)buf;
1263 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1265 * Fill in the new header.
1267 sfp->hdr.count = oldsfp->hdr.count;
1268 sfp->hdr.i8count = 1;
1269 ino = xfs_dir2_sf_get_inumber(oldsfp, &oldsfp->hdr.parent);
1270 xfs_dir2_sf_put_inumber(sfp, &ino, &sfp->hdr.parent);
1272 * Copy the entries field by field.
1274 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1275 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1277 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
1278 oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
1279 sfep->namelen = oldsfep->namelen;
1280 sfep->offset = oldsfep->offset;
1281 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1282 ino = xfs_dir2_sf_get_inumber(oldsfp,
1283 xfs_dir2_sf_inumberp(oldsfep));
1284 xfs_dir2_sf_put_inumber(sfp, &ino, xfs_dir2_sf_inumberp(sfep));
1287 * Clean up the inode.
1289 kmem_free(buf, oldsize);
1290 dp->i_d.di_size = newsize;
1291 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1293 #endif /* XFS_BIG_INUMS */