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"
27 #include "xfs_dmapi.h"
28 #include "xfs_mount.h"
29 #include "xfs_da_btree.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_dir2_sf.h"
32 #include "xfs_attr_sf.h"
33 #include "xfs_dinode.h"
34 #include "xfs_inode.h"
35 #include "xfs_inode_item.h"
36 #include "xfs_error.h"
37 #include "xfs_dir2_data.h"
38 #include "xfs_dir2_leaf.h"
39 #include "xfs_dir2_block.h"
40 #include "xfs_dir2_trace.h"
43 * Prototypes for internal functions.
45 static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
46 xfs_dir2_sf_entry_t *sfep,
47 xfs_dir2_data_aoff_t offset,
49 static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
51 static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
52 xfs_dir2_sf_entry_t **sfepp,
53 xfs_dir2_data_aoff_t *offsetp);
55 static void xfs_dir2_sf_check(xfs_da_args_t *args);
57 #define xfs_dir2_sf_check(args)
60 static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
61 static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
62 #endif /* XFS_BIG_INUMS */
65 * Given a block directory (dp/block), calculate its size as a shortform (sf)
66 * directory and a header for the sf directory, if it will fit it the
67 * space currently present in the inode. If it won't fit, the output
68 * size is too big (but not accurate).
70 int /* size for sf form */
71 xfs_dir2_block_sfsize(
72 xfs_inode_t *dp, /* incore inode pointer */
73 xfs_dir2_block_t *block, /* block directory data */
74 xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
76 xfs_dir2_dataptr_t addr; /* data entry address */
77 xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
78 xfs_dir2_block_tail_t *btp; /* tail area of the block */
79 int count; /* shortform entry count */
80 xfs_dir2_data_entry_t *dep; /* data entry in the block */
81 int i; /* block entry index */
82 int i8count; /* count of big-inode entries */
83 int isdot; /* entry is "." */
84 int isdotdot; /* entry is ".." */
85 xfs_mount_t *mp; /* mount structure pointer */
86 int namelen; /* total name bytes */
87 xfs_ino_t parent = 0; /* parent inode number */
88 int size=0; /* total computed size */
92 count = i8count = namelen = 0;
93 btp = xfs_dir2_block_tail_p(mp, block);
94 blp = xfs_dir2_block_leaf_p(btp);
97 * Iterate over the block's data entries by using the leaf pointers.
99 for (i = 0; i < be32_to_cpu(btp->count); i++) {
100 if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
103 * Calculate the pointer to the entry at hand.
105 dep = (xfs_dir2_data_entry_t *)
106 ((char *)block + xfs_dir2_dataptr_to_off(mp, addr));
108 * Detect . and .., so we can special-case them.
109 * . is not included in sf directories.
110 * .. is included by just the parent inode number.
112 isdot = dep->namelen == 1 && dep->name[0] == '.';
115 dep->name[0] == '.' && dep->name[1] == '.';
118 i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
120 if (!isdot && !isdotdot) {
122 namelen += dep->namelen;
124 parent = be64_to_cpu(dep->inumber);
126 * Calculate the new size, see if we should give up yet.
128 size = xfs_dir2_sf_hdr_size(i8count) + /* header */
129 count + /* namelen */
130 count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
132 (i8count ? /* inumber */
133 (uint)sizeof(xfs_dir2_ino8_t) * count :
134 (uint)sizeof(xfs_dir2_ino4_t) * count);
135 if (size > XFS_IFORK_DSIZE(dp))
136 return size; /* size value is a failure */
139 * Create the output header, if it worked.
142 sfhp->i8count = i8count;
143 xfs_dir2_sf_put_inumber((xfs_dir2_sf_t *)sfhp, &parent, &sfhp->parent);
148 * Convert a block format directory to shortform.
149 * Caller has already checked that it will fit, and built us a header.
152 xfs_dir2_block_to_sf(
153 xfs_da_args_t *args, /* operation arguments */
154 xfs_dabuf_t *bp, /* block buffer */
155 int size, /* shortform directory size */
156 xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
158 xfs_dir2_block_t *block; /* block structure */
159 xfs_dir2_block_tail_t *btp; /* block tail pointer */
160 xfs_dir2_data_entry_t *dep; /* data entry pointer */
161 xfs_inode_t *dp; /* incore directory inode */
162 xfs_dir2_data_unused_t *dup; /* unused data pointer */
163 char *endptr; /* end of data entries */
164 int error; /* error return value */
165 int logflags; /* inode logging flags */
166 xfs_mount_t *mp; /* filesystem mount point */
167 char *ptr; /* current data pointer */
168 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
169 xfs_dir2_sf_t *sfp; /* shortform structure */
172 xfs_dir2_trace_args_sb("block_to_sf", args, size, bp);
177 * Make a copy of the block data, so we can shrink the inode
178 * and add local data.
180 block = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
181 memcpy(block, bp->data, mp->m_dirblksize);
182 logflags = XFS_ILOG_CORE;
183 if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
184 ASSERT(error != ENOSPC);
188 * The buffer is now unconditionally gone, whether
189 * xfs_dir2_shrink_inode worked or not.
191 * Convert the inode to local format.
193 dp->i_df.if_flags &= ~XFS_IFEXTENTS;
194 dp->i_df.if_flags |= XFS_IFINLINE;
195 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
196 ASSERT(dp->i_df.if_bytes == 0);
197 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
198 logflags |= XFS_ILOG_DDATA;
200 * Copy the header into the newly allocate local space.
202 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
203 memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
204 dp->i_d.di_size = size;
206 * Set up to loop over the block's entries.
208 btp = xfs_dir2_block_tail_p(mp, block);
209 ptr = (char *)block->u;
210 endptr = (char *)xfs_dir2_block_leaf_p(btp);
211 sfep = xfs_dir2_sf_firstentry(sfp);
213 * Loop over the active and unused entries.
214 * Stop when we reach the leaf/tail portion of the block.
216 while (ptr < endptr) {
218 * If it's unused, just skip over it.
220 dup = (xfs_dir2_data_unused_t *)ptr;
221 if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
222 ptr += be16_to_cpu(dup->length);
225 dep = (xfs_dir2_data_entry_t *)ptr;
229 if (dep->namelen == 1 && dep->name[0] == '.')
230 ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
232 * Skip .., but make sure the inode number is right.
234 else if (dep->namelen == 2 &&
235 dep->name[0] == '.' && dep->name[1] == '.')
236 ASSERT(be64_to_cpu(dep->inumber) ==
237 xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent));
239 * Normal entry, copy it into shortform.
242 sfep->namelen = dep->namelen;
243 xfs_dir2_sf_put_offset(sfep,
244 (xfs_dir2_data_aoff_t)
245 ((char *)dep - (char *)block));
246 memcpy(sfep->name, dep->name, dep->namelen);
247 temp = be64_to_cpu(dep->inumber);
248 xfs_dir2_sf_put_inumber(sfp, &temp,
249 xfs_dir2_sf_inumberp(sfep));
250 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
252 ptr += xfs_dir2_data_entsize(dep->namelen);
254 ASSERT((char *)sfep - (char *)sfp == size);
255 xfs_dir2_sf_check(args);
257 xfs_trans_log_inode(args->trans, dp, logflags);
263 * Add a name to a shortform directory.
264 * There are two algorithms, "easy" and "hard" which we decide on
265 * before changing anything.
266 * Convert to block form if necessary, if the new entry won't fit.
270 xfs_da_args_t *args) /* operation arguments */
272 int add_entsize; /* size of the new entry */
273 xfs_inode_t *dp; /* incore directory inode */
274 int error; /* error return value */
275 int incr_isize; /* total change in size */
276 int new_isize; /* di_size after adding name */
277 int objchange; /* changing to 8-byte inodes */
278 xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
279 int old_isize; /* di_size before adding name */
280 int pick; /* which algorithm to use */
281 xfs_dir2_sf_t *sfp; /* shortform structure */
282 xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
284 xfs_dir2_trace_args("sf_addname", args);
285 ASSERT(xfs_dir2_sf_lookup(args) == ENOENT);
287 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
289 * Make sure the shortform value has some of its header.
291 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
292 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
293 return XFS_ERROR(EIO);
295 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
296 ASSERT(dp->i_df.if_u1.if_data != NULL);
297 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
298 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
300 * Compute entry (and change in) size.
302 add_entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
303 incr_isize = add_entsize;
307 * Do we have to change to 8 byte inodes?
309 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
311 * Yes, adjust the entry size and the total size.
314 (uint)sizeof(xfs_dir2_ino8_t) -
315 (uint)sizeof(xfs_dir2_ino4_t);
317 (sfp->hdr.count + 2) *
318 ((uint)sizeof(xfs_dir2_ino8_t) -
319 (uint)sizeof(xfs_dir2_ino4_t));
323 old_isize = (int)dp->i_d.di_size;
324 new_isize = old_isize + incr_isize;
326 * Won't fit as shortform any more (due to size),
327 * or the pick routine says it won't (due to offset values).
329 if (new_isize > XFS_IFORK_DSIZE(dp) ||
331 xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
333 * Just checking or no space reservation, it doesn't fit.
335 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
336 return XFS_ERROR(ENOSPC);
338 * Convert to block form then add the name.
340 error = xfs_dir2_sf_to_block(args);
343 return xfs_dir2_block_addname(args);
346 * Just checking, it fits.
348 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
351 * Do it the easy way - just add it at the end.
354 xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
356 * Do it the hard way - look for a place to insert the new entry.
357 * Convert to 8 byte inode numbers first if necessary.
363 xfs_dir2_sf_toino8(args);
365 xfs_dir2_sf_addname_hard(args, objchange, new_isize);
367 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
372 * Add the new entry the "easy" way.
373 * This is copying the old directory and adding the new entry at the end.
374 * Since it's sorted by "offset" we need room after the last offset
375 * that's already there, and then room to convert to a block directory.
376 * This is already checked by the pick routine.
379 xfs_dir2_sf_addname_easy(
380 xfs_da_args_t *args, /* operation arguments */
381 xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
382 xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
383 int new_isize) /* new directory size */
385 int byteoff; /* byte offset in sf dir */
386 xfs_inode_t *dp; /* incore directory inode */
387 xfs_dir2_sf_t *sfp; /* shortform structure */
391 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
392 byteoff = (int)((char *)sfep - (char *)sfp);
394 * Grow the in-inode space.
396 xfs_idata_realloc(dp, xfs_dir2_sf_entsize_byname(sfp, args->namelen),
399 * Need to set up again due to realloc of the inode data.
401 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
402 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
404 * Fill in the new entry.
406 sfep->namelen = args->namelen;
407 xfs_dir2_sf_put_offset(sfep, offset);
408 memcpy(sfep->name, args->name, sfep->namelen);
409 xfs_dir2_sf_put_inumber(sfp, &args->inumber,
410 xfs_dir2_sf_inumberp(sfep));
412 * Update the header and inode.
416 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
419 dp->i_d.di_size = new_isize;
420 xfs_dir2_sf_check(args);
424 * Add the new entry the "hard" way.
425 * The caller has already converted to 8 byte inode numbers if necessary,
426 * in which case we need to leave the i8count at 1.
427 * Find a hole that the new entry will fit into, and copy
428 * the first part of the entries, the new entry, and the last part of
433 xfs_dir2_sf_addname_hard(
434 xfs_da_args_t *args, /* operation arguments */
435 int objchange, /* changing inode number size */
436 int new_isize) /* new directory size */
438 int add_datasize; /* data size need for new ent */
439 char *buf; /* buffer for old */
440 xfs_inode_t *dp; /* incore directory inode */
441 int eof; /* reached end of old dir */
442 int nbytes; /* temp for byte copies */
443 xfs_dir2_data_aoff_t new_offset; /* next offset value */
444 xfs_dir2_data_aoff_t offset; /* current offset value */
445 int old_isize; /* previous di_size */
446 xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
447 xfs_dir2_sf_t *oldsfp; /* original shortform dir */
448 xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
449 xfs_dir2_sf_t *sfp; /* new shortform dir */
452 * Copy the old directory to the stack buffer.
456 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
457 old_isize = (int)dp->i_d.di_size;
458 buf = kmem_alloc(old_isize, KM_SLEEP);
459 oldsfp = (xfs_dir2_sf_t *)buf;
460 memcpy(oldsfp, sfp, old_isize);
462 * Loop over the old directory finding the place we're going
463 * to insert the new entry.
464 * If it's going to end up at the end then oldsfep will point there.
466 for (offset = XFS_DIR2_DATA_FIRST_OFFSET,
467 oldsfep = xfs_dir2_sf_firstentry(oldsfp),
468 add_datasize = xfs_dir2_data_entsize(args->namelen),
469 eof = (char *)oldsfep == &buf[old_isize];
471 offset = new_offset + xfs_dir2_data_entsize(oldsfep->namelen),
472 oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep),
473 eof = (char *)oldsfep == &buf[old_isize]) {
474 new_offset = xfs_dir2_sf_get_offset(oldsfep);
475 if (offset + add_datasize <= new_offset)
479 * Get rid of the old directory, then allocate space for
480 * the new one. We do this so xfs_idata_realloc won't copy
483 xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
484 xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
486 * Reset the pointer since the buffer was reallocated.
488 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
490 * Copy the first part of the directory, including the header.
492 nbytes = (int)((char *)oldsfep - (char *)oldsfp);
493 memcpy(sfp, oldsfp, nbytes);
494 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
496 * Fill in the new entry, and update the header counts.
498 sfep->namelen = args->namelen;
499 xfs_dir2_sf_put_offset(sfep, offset);
500 memcpy(sfep->name, args->name, sfep->namelen);
501 xfs_dir2_sf_put_inumber(sfp, &args->inumber,
502 xfs_dir2_sf_inumberp(sfep));
505 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
509 * If there's more left to copy, do that.
512 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
513 memcpy(sfep, oldsfep, old_isize - nbytes);
516 dp->i_d.di_size = new_isize;
517 xfs_dir2_sf_check(args);
521 * Decide if the new entry will fit at all.
522 * If it will fit, pick between adding the new entry to the end (easy)
523 * or somewhere else (hard).
524 * Return 0 (won't fit), 1 (easy), 2 (hard).
527 static int /* pick result */
528 xfs_dir2_sf_addname_pick(
529 xfs_da_args_t *args, /* operation arguments */
530 int objchange, /* inode # size changes */
531 xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
532 xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
534 xfs_inode_t *dp; /* incore directory inode */
535 int holefit; /* found hole it will fit in */
536 int i; /* entry number */
537 xfs_mount_t *mp; /* filesystem mount point */
538 xfs_dir2_data_aoff_t offset; /* data block offset */
539 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
540 xfs_dir2_sf_t *sfp; /* shortform structure */
541 int size; /* entry's data size */
542 int used; /* data bytes used */
547 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
548 size = xfs_dir2_data_entsize(args->namelen);
549 offset = XFS_DIR2_DATA_FIRST_OFFSET;
550 sfep = xfs_dir2_sf_firstentry(sfp);
553 * Loop over sf entries.
554 * Keep track of data offset and whether we've seen a place
555 * to insert the new entry.
557 for (i = 0; i < sfp->hdr.count; i++) {
559 holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
560 offset = xfs_dir2_sf_get_offset(sfep) +
561 xfs_dir2_data_entsize(sfep->namelen);
562 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
565 * Calculate data bytes used excluding the new entry, if this
566 * was a data block (block form directory).
569 (sfp->hdr.count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
570 (uint)sizeof(xfs_dir2_block_tail_t);
572 * If it won't fit in a block form then we can't insert it,
573 * we'll go back, convert to block, then try the insert and convert
576 if (used + (holefit ? 0 : size) > mp->m_dirblksize)
579 * If changing the inode number size, do it the hard way.
586 ASSERT(objchange == 0);
589 * If it won't fit at the end then do it the hard way (use the hole).
591 if (used + size > mp->m_dirblksize)
594 * Do it the easy way.
603 * Check consistency of shortform directory, assert if bad.
607 xfs_da_args_t *args) /* operation arguments */
609 xfs_inode_t *dp; /* incore directory inode */
610 int i; /* entry number */
611 int i8count; /* number of big inode#s */
612 xfs_ino_t ino; /* entry inode number */
613 int offset; /* data offset */
614 xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
615 xfs_dir2_sf_t *sfp; /* shortform structure */
619 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
620 offset = XFS_DIR2_DATA_FIRST_OFFSET;
621 ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
622 i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
624 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
626 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
627 ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
628 ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
629 i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
631 xfs_dir2_sf_get_offset(sfep) +
632 xfs_dir2_data_entsize(sfep->namelen);
634 ASSERT(i8count == sfp->hdr.i8count);
635 ASSERT(XFS_BIG_INUMS || i8count == 0);
636 ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
638 (sfp->hdr.count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
639 (uint)sizeof(xfs_dir2_block_tail_t) <=
640 dp->i_mount->m_dirblksize);
645 * Create a new (shortform) directory.
647 int /* error, always 0 */
649 xfs_da_args_t *args, /* operation arguments */
650 xfs_ino_t pino) /* parent inode number */
652 xfs_inode_t *dp; /* incore directory inode */
653 int i8count; /* parent inode is an 8-byte number */
654 xfs_dir2_sf_t *sfp; /* shortform structure */
655 int size; /* directory size */
657 xfs_dir2_trace_args_i("sf_create", args, pino);
661 ASSERT(dp->i_d.di_size == 0);
663 * If it's currently a zero-length extent file,
664 * convert it to local format.
666 if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
667 dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
668 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
669 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
670 dp->i_df.if_flags |= XFS_IFINLINE;
672 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
673 ASSERT(dp->i_df.if_bytes == 0);
674 i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
675 size = xfs_dir2_sf_hdr_size(i8count);
677 * Make a buffer for the data.
679 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
681 * Fill in the header,
683 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
684 sfp->hdr.i8count = i8count;
686 * Now can put in the inode number, since i8count is set.
688 xfs_dir2_sf_put_inumber(sfp, &pino, &sfp->hdr.parent);
690 dp->i_d.di_size = size;
691 xfs_dir2_sf_check(args);
692 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
697 xfs_dir2_sf_getdents(
698 xfs_inode_t *dp, /* incore directory inode */
703 int i; /* shortform entry number */
704 xfs_mount_t *mp; /* filesystem mount point */
705 xfs_dir2_dataptr_t off; /* current entry's offset */
706 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
707 xfs_dir2_sf_t *sfp; /* shortform structure */
708 xfs_dir2_dataptr_t dot_offset;
709 xfs_dir2_dataptr_t dotdot_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 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
724 ASSERT(dp->i_df.if_u1.if_data != NULL);
726 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
728 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
731 * If the block number in the offset is out of range, we're done.
733 if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk)
737 * Precalculate offsets for . and .. as we will always need them.
739 * XXX(hch): the second argument is sometimes 0 and sometimes
742 dot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
743 XFS_DIR2_DATA_DOT_OFFSET);
744 dotdot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
745 XFS_DIR2_DATA_DOTDOT_OFFSET);
748 * Put . entry unless we're starting past it.
750 if (*offset <= dot_offset) {
751 if (filldir(dirent, ".", 1, dot_offset & 0x7fffffff, dp->i_ino, DT_DIR)) {
752 *offset = dot_offset & 0x7fffffff;
758 * Put .. entry unless we're starting past it.
760 if (*offset <= dotdot_offset) {
761 ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
762 if (filldir(dirent, "..", 2, dotdot_offset & 0x7fffffff, ino, DT_DIR)) {
763 *offset = dotdot_offset & 0x7fffffff;
769 * Loop while there are more entries and put'ing works.
771 sfep = xfs_dir2_sf_firstentry(sfp);
772 for (i = 0; i < sfp->hdr.count; i++) {
773 off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
774 xfs_dir2_sf_get_offset(sfep));
777 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
781 ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
782 if (filldir(dirent, sfep->name, sfep->namelen,
783 off & 0x7fffffff, ino, DT_UNKNOWN)) {
784 *offset = off & 0x7fffffff;
787 sfep = xfs_dir2_sf_nextentry(sfp, sfep);
790 *offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0) &
796 * Lookup an entry in a shortform directory.
797 * Returns EEXIST if found, ENOENT if not found.
801 xfs_da_args_t *args) /* operation arguments */
803 xfs_inode_t *dp; /* incore directory inode */
804 int i; /* entry index */
806 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
807 xfs_dir2_sf_t *sfp; /* shortform structure */
808 enum xfs_dacmp cmp; /* comparison result */
809 xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
811 xfs_dir2_trace_args("sf_lookup", args);
812 xfs_dir2_sf_check(args);
815 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
817 * Bail out if the directory is way too short.
819 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
820 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
821 return XFS_ERROR(EIO);
823 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
824 ASSERT(dp->i_df.if_u1.if_data != NULL);
825 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
826 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
830 if (args->namelen == 1 && args->name[0] == '.') {
831 args->inumber = dp->i_ino;
832 args->cmpresult = XFS_CMP_EXACT;
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_inumber(sfp, &sfp->hdr.parent);
841 args->cmpresult = XFS_CMP_EXACT;
842 return XFS_ERROR(EEXIST);
845 * Loop over all the entries trying to match ours.
848 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->hdr.count;
849 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
851 * Compare name and if it's an exact match, return the inode
852 * number. If it's the first case-insensitive match, store the
853 * inode number and continue looking for an exact match.
855 cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name,
857 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
858 args->cmpresult = cmp;
859 args->inumber = xfs_dir2_sf_get_inumber(sfp,
860 xfs_dir2_sf_inumberp(sfep));
861 if (cmp == XFS_CMP_EXACT)
862 return XFS_ERROR(EEXIST);
866 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
868 * Here, we can only be doing a lookup (not a rename or replace).
869 * If a case-insensitive match was not found, return ENOENT.
872 return XFS_ERROR(ENOENT);
873 /* otherwise process the CI match as required by the caller */
874 error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
875 return XFS_ERROR(error);
879 * Remove an entry from a shortform directory.
882 xfs_dir2_sf_removename(
885 int byteoff; /* offset of removed entry */
886 xfs_inode_t *dp; /* incore directory inode */
887 int entsize; /* this entry's size */
888 int i; /* shortform entry index */
889 int newsize; /* new inode size */
890 int oldsize; /* old inode size */
891 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
892 xfs_dir2_sf_t *sfp; /* shortform structure */
894 xfs_dir2_trace_args("sf_removename", args);
897 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
898 oldsize = (int)dp->i_d.di_size;
900 * Bail out if the directory is way too short.
902 if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
903 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
904 return XFS_ERROR(EIO);
906 ASSERT(dp->i_df.if_bytes == oldsize);
907 ASSERT(dp->i_df.if_u1.if_data != NULL);
908 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
909 ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
911 * Loop over the old directory entries.
912 * Find the one we're deleting.
914 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->hdr.count;
915 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
916 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
918 ASSERT(xfs_dir2_sf_get_inumber(sfp,
919 xfs_dir2_sf_inumberp(sfep)) ==
927 if (i == sfp->hdr.count)
928 return XFS_ERROR(ENOENT);
932 byteoff = (int)((char *)sfep - (char *)sfp);
933 entsize = xfs_dir2_sf_entsize_byname(sfp, args->namelen);
934 newsize = oldsize - entsize;
936 * Copy the part if any after the removed entry, sliding it down.
938 if (byteoff + entsize < oldsize)
939 memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
940 oldsize - (byteoff + entsize));
942 * Fix up the header and file size.
945 dp->i_d.di_size = newsize;
947 * Reallocate, making it smaller.
949 xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
950 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
953 * Are we changing inode number size?
955 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
956 if (sfp->hdr.i8count == 1)
957 xfs_dir2_sf_toino4(args);
962 xfs_dir2_sf_check(args);
963 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
968 * Replace the inode number of an entry in a shortform directory.
972 xfs_da_args_t *args) /* operation arguments */
974 xfs_inode_t *dp; /* incore directory inode */
975 int i; /* entry index */
976 #if XFS_BIG_INUMS || defined(DEBUG)
977 xfs_ino_t ino=0; /* entry old inode number */
980 int i8elevated; /* sf_toino8 set i8count=1 */
982 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
983 xfs_dir2_sf_t *sfp; /* shortform structure */
985 xfs_dir2_trace_args("sf_replace", args);
988 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
990 * Bail out if the shortform directory is way too small.
992 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
993 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
994 return XFS_ERROR(EIO);
996 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
997 ASSERT(dp->i_df.if_u1.if_data != NULL);
998 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
999 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->hdr.i8count));
1002 * New inode number is large, and need to convert to 8-byte inodes.
1004 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->hdr.i8count == 0) {
1005 int error; /* error return value */
1006 int newsize; /* new inode size */
1010 (sfp->hdr.count + 1) *
1011 ((uint)sizeof(xfs_dir2_ino8_t) -
1012 (uint)sizeof(xfs_dir2_ino4_t));
1014 * Won't fit as shortform, convert to block then do replace.
1016 if (newsize > XFS_IFORK_DSIZE(dp)) {
1017 error = xfs_dir2_sf_to_block(args);
1021 return xfs_dir2_block_replace(args);
1024 * Still fits, convert to 8-byte now.
1026 xfs_dir2_sf_toino8(args);
1028 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1032 ASSERT(args->namelen != 1 || args->name[0] != '.');
1034 * Replace ..'s entry.
1036 if (args->namelen == 2 &&
1037 args->name[0] == '.' && args->name[1] == '.') {
1038 #if XFS_BIG_INUMS || defined(DEBUG)
1039 ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
1040 ASSERT(args->inumber != ino);
1042 xfs_dir2_sf_put_inumber(sfp, &args->inumber, &sfp->hdr.parent);
1045 * Normal entry, look for the name.
1048 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
1050 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
1051 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
1053 #if XFS_BIG_INUMS || defined(DEBUG)
1054 ino = xfs_dir2_sf_get_inumber(sfp,
1055 xfs_dir2_sf_inumberp(sfep));
1056 ASSERT(args->inumber != ino);
1058 xfs_dir2_sf_put_inumber(sfp, &args->inumber,
1059 xfs_dir2_sf_inumberp(sfep));
1066 if (i == sfp->hdr.count) {
1067 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
1070 xfs_dir2_sf_toino4(args);
1072 return XFS_ERROR(ENOENT);
1077 * See if the old number was large, the new number is small.
1079 if (ino > XFS_DIR2_MAX_SHORT_INUM &&
1080 args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
1082 * And the old count was one, so need to convert to small.
1084 if (sfp->hdr.i8count == 1)
1085 xfs_dir2_sf_toino4(args);
1090 * See if the old number was small, the new number is large.
1092 if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
1093 args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1095 * add to the i8count unless we just converted to 8-byte
1096 * inodes (which does an implied i8count = 1)
1098 ASSERT(sfp->hdr.i8count != 0);
1103 xfs_dir2_sf_check(args);
1104 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1110 * Convert from 8-byte inode numbers to 4-byte inode numbers.
1111 * The last 8-byte inode number is gone, but the count is still 1.
1115 xfs_da_args_t *args) /* operation arguments */
1117 char *buf; /* old dir's buffer */
1118 xfs_inode_t *dp; /* incore directory inode */
1119 int i; /* entry index */
1120 xfs_ino_t ino; /* entry inode number */
1121 int newsize; /* new inode size */
1122 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1123 xfs_dir2_sf_t *oldsfp; /* old sf directory */
1124 int oldsize; /* old inode size */
1125 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1126 xfs_dir2_sf_t *sfp; /* new sf directory */
1128 xfs_dir2_trace_args("sf_toino4", args);
1132 * Copy the old directory to the buffer.
1133 * Then nuke it from the inode, and add the new buffer to the inode.
1134 * Don't want xfs_idata_realloc copying the data here.
1136 oldsize = dp->i_df.if_bytes;
1137 buf = kmem_alloc(oldsize, KM_SLEEP);
1138 oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1139 ASSERT(oldsfp->hdr.i8count == 1);
1140 memcpy(buf, oldsfp, oldsize);
1142 * Compute the new inode size.
1146 (oldsfp->hdr.count + 1) *
1147 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1148 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1149 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1151 * Reset our pointers, the data has moved.
1153 oldsfp = (xfs_dir2_sf_t *)buf;
1154 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1156 * Fill in the new header.
1158 sfp->hdr.count = oldsfp->hdr.count;
1159 sfp->hdr.i8count = 0;
1160 ino = xfs_dir2_sf_get_inumber(oldsfp, &oldsfp->hdr.parent);
1161 xfs_dir2_sf_put_inumber(sfp, &ino, &sfp->hdr.parent);
1163 * Copy the entries field by field.
1165 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1166 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1168 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
1169 oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
1170 sfep->namelen = oldsfep->namelen;
1171 sfep->offset = oldsfep->offset;
1172 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1173 ino = xfs_dir2_sf_get_inumber(oldsfp,
1174 xfs_dir2_sf_inumberp(oldsfep));
1175 xfs_dir2_sf_put_inumber(sfp, &ino, xfs_dir2_sf_inumberp(sfep));
1178 * Clean up the inode.
1181 dp->i_d.di_size = newsize;
1182 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1186 * Convert from 4-byte inode numbers to 8-byte inode numbers.
1187 * The new 8-byte inode number is not there yet, we leave with the
1188 * count 1 but no corresponding entry.
1192 xfs_da_args_t *args) /* operation arguments */
1194 char *buf; /* old dir's buffer */
1195 xfs_inode_t *dp; /* incore directory inode */
1196 int i; /* entry index */
1197 xfs_ino_t ino; /* entry inode number */
1198 int newsize; /* new inode size */
1199 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1200 xfs_dir2_sf_t *oldsfp; /* old sf directory */
1201 int oldsize; /* old inode size */
1202 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1203 xfs_dir2_sf_t *sfp; /* new sf directory */
1205 xfs_dir2_trace_args("sf_toino8", args);
1209 * Copy the old directory to the buffer.
1210 * Then nuke it from the inode, and add the new buffer to the inode.
1211 * Don't want xfs_idata_realloc copying the data here.
1213 oldsize = dp->i_df.if_bytes;
1214 buf = kmem_alloc(oldsize, KM_SLEEP);
1215 oldsfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1216 ASSERT(oldsfp->hdr.i8count == 0);
1217 memcpy(buf, oldsfp, oldsize);
1219 * Compute the new inode size.
1223 (oldsfp->hdr.count + 1) *
1224 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1225 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1226 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1228 * Reset our pointers, the data has moved.
1230 oldsfp = (xfs_dir2_sf_t *)buf;
1231 sfp = (xfs_dir2_sf_t *)dp->i_df.if_u1.if_data;
1233 * Fill in the new header.
1235 sfp->hdr.count = oldsfp->hdr.count;
1236 sfp->hdr.i8count = 1;
1237 ino = xfs_dir2_sf_get_inumber(oldsfp, &oldsfp->hdr.parent);
1238 xfs_dir2_sf_put_inumber(sfp, &ino, &sfp->hdr.parent);
1240 * Copy the entries field by field.
1242 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1243 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1245 i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep),
1246 oldsfep = xfs_dir2_sf_nextentry(oldsfp, oldsfep)) {
1247 sfep->namelen = oldsfep->namelen;
1248 sfep->offset = oldsfep->offset;
1249 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1250 ino = xfs_dir2_sf_get_inumber(oldsfp,
1251 xfs_dir2_sf_inumberp(oldsfep));
1252 xfs_dir2_sf_put_inumber(sfp, &ino, xfs_dir2_sf_inumberp(sfep));
1255 * Clean up the inode.
1258 dp->i_d.di_size = newsize;
1259 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1261 #endif /* XFS_BIG_INUMS */