2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include "xfs_format.h"
21 #include "xfs_log_format.h"
22 #include "xfs_trans_resv.h"
25 #include "xfs_mount.h"
26 #include "xfs_da_format.h"
27 #include "xfs_da_btree.h"
28 #include "xfs_inode.h"
29 #include "xfs_trans.h"
30 #include "xfs_inode_item.h"
31 #include "xfs_error.h"
33 #include "xfs_dir2_priv.h"
34 #include "xfs_trace.h"
37 * Prototypes for internal functions.
39 static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
40 xfs_dir2_sf_entry_t *sfep,
41 xfs_dir2_data_aoff_t offset,
43 static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
45 static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
46 xfs_dir2_sf_entry_t **sfepp,
47 xfs_dir2_data_aoff_t *offsetp);
49 static void xfs_dir2_sf_check(xfs_da_args_t *args);
51 #define xfs_dir2_sf_check(args)
54 static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
55 static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
58 * Given a block directory (dp/block), calculate its size as a shortform (sf)
59 * directory and a header for the sf directory, if it will fit it the
60 * space currently present in the inode. If it won't fit, the output
61 * size is too big (but not accurate).
63 int /* size for sf form */
64 xfs_dir2_block_sfsize(
65 xfs_inode_t *dp, /* incore inode pointer */
66 xfs_dir2_data_hdr_t *hdr, /* block directory data */
67 xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
69 xfs_dir2_dataptr_t addr; /* data entry address */
70 xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
71 xfs_dir2_block_tail_t *btp; /* tail area of the block */
72 int count; /* shortform entry count */
73 xfs_dir2_data_entry_t *dep; /* data entry in the block */
74 int i; /* block entry index */
75 int i8count; /* count of big-inode entries */
76 int isdot; /* entry is "." */
77 int isdotdot; /* entry is ".." */
78 xfs_mount_t *mp; /* mount structure pointer */
79 int namelen; /* total name bytes */
80 xfs_ino_t parent = 0; /* parent inode number */
81 int size=0; /* total computed size */
83 struct xfs_da_geometry *geo;
89 * if there is a filetype field, add the extra byte to the namelen
90 * for each entry that we see.
92 has_ftype = xfs_sb_version_hasftype(&mp->m_sb) ? 1 : 0;
94 count = i8count = namelen = 0;
95 btp = xfs_dir2_block_tail_p(geo, hdr);
96 blp = xfs_dir2_block_leaf_p(btp);
99 * Iterate over the block's data entries by using the leaf pointers.
101 for (i = 0; i < be32_to_cpu(btp->count); i++) {
102 if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
105 * Calculate the pointer to the entry at hand.
107 dep = (xfs_dir2_data_entry_t *)((char *)hdr +
108 xfs_dir2_dataptr_to_off(geo, addr));
110 * Detect . and .., so we can special-case them.
111 * . is not included in sf directories.
112 * .. is included by just the parent inode number.
114 isdot = dep->namelen == 1 && dep->name[0] == '.';
117 dep->name[0] == '.' && dep->name[1] == '.';
120 i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
122 /* take into account the file type field */
123 if (!isdot && !isdotdot) {
125 namelen += dep->namelen + has_ftype;
127 parent = be64_to_cpu(dep->inumber);
129 * Calculate the new size, see if we should give up yet.
131 size = xfs_dir2_sf_hdr_size(i8count) + /* header */
132 count + /* namelen */
133 count * (uint)sizeof(xfs_dir2_sf_off_t) + /* offset */
135 (i8count ? /* inumber */
136 (uint)sizeof(xfs_dir2_ino8_t) * count :
137 (uint)sizeof(xfs_dir2_ino4_t) * count);
138 if (size > XFS_IFORK_DSIZE(dp))
139 return size; /* size value is a failure */
142 * Create the output header, if it worked.
145 sfhp->i8count = i8count;
146 dp->d_ops->sf_put_parent_ino(sfhp, parent);
151 * Convert a block format directory to shortform.
152 * Caller has already checked that it will fit, and built us a header.
155 xfs_dir2_block_to_sf(
156 xfs_da_args_t *args, /* operation arguments */
158 int size, /* shortform directory size */
159 xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
161 xfs_dir2_data_hdr_t *hdr; /* block header */
162 xfs_dir2_block_tail_t *btp; /* block tail pointer */
163 xfs_dir2_data_entry_t *dep; /* data entry pointer */
164 xfs_inode_t *dp; /* incore directory inode */
165 xfs_dir2_data_unused_t *dup; /* unused data pointer */
166 char *endptr; /* end of data entries */
167 int error; /* error return value */
168 int logflags; /* inode logging flags */
169 xfs_mount_t *mp; /* filesystem mount point */
170 char *ptr; /* current data pointer */
171 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
172 xfs_dir2_sf_hdr_t *sfp; /* shortform directory header */
173 xfs_dir2_sf_hdr_t *dst; /* temporary data buffer */
175 trace_xfs_dir2_block_to_sf(args);
181 * allocate a temporary destination buffer the size of the inode
182 * to format the data into. Once we have formatted the data, we
183 * can free the block and copy the formatted data into the inode literal
186 dst = kmem_alloc(mp->m_sb.sb_inodesize, KM_SLEEP);
190 * Copy the header into the newly allocate local space.
192 sfp = (xfs_dir2_sf_hdr_t *)dst;
193 memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
196 * Set up to loop over the block's entries.
198 btp = xfs_dir2_block_tail_p(args->geo, hdr);
199 ptr = (char *)dp->d_ops->data_entry_p(hdr);
200 endptr = (char *)xfs_dir2_block_leaf_p(btp);
201 sfep = xfs_dir2_sf_firstentry(sfp);
203 * Loop over the active and unused entries.
204 * Stop when we reach the leaf/tail portion of the block.
206 while (ptr < endptr) {
208 * If it's unused, just skip over it.
210 dup = (xfs_dir2_data_unused_t *)ptr;
211 if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
212 ptr += be16_to_cpu(dup->length);
215 dep = (xfs_dir2_data_entry_t *)ptr;
219 if (dep->namelen == 1 && dep->name[0] == '.')
220 ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
222 * Skip .., but make sure the inode number is right.
224 else if (dep->namelen == 2 &&
225 dep->name[0] == '.' && dep->name[1] == '.')
226 ASSERT(be64_to_cpu(dep->inumber) ==
227 dp->d_ops->sf_get_parent_ino(sfp));
229 * Normal entry, copy it into shortform.
232 sfep->namelen = dep->namelen;
233 xfs_dir2_sf_put_offset(sfep,
234 (xfs_dir2_data_aoff_t)
235 ((char *)dep - (char *)hdr));
236 memcpy(sfep->name, dep->name, dep->namelen);
237 dp->d_ops->sf_put_ino(sfp, sfep,
238 be64_to_cpu(dep->inumber));
239 dp->d_ops->sf_put_ftype(sfep,
240 dp->d_ops->data_get_ftype(dep));
242 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
244 ptr += dp->d_ops->data_entsize(dep->namelen);
246 ASSERT((char *)sfep - (char *)sfp == size);
248 /* now we are done with the block, we can shrink the inode */
249 logflags = XFS_ILOG_CORE;
250 error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
252 ASSERT(error != -ENOSPC);
257 * The buffer is now unconditionally gone, whether
258 * xfs_dir2_shrink_inode worked or not.
260 * Convert the inode to local format and copy the data in.
262 dp->i_df.if_flags &= ~XFS_IFEXTENTS;
263 dp->i_df.if_flags |= XFS_IFINLINE;
264 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
265 ASSERT(dp->i_df.if_bytes == 0);
266 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
268 logflags |= XFS_ILOG_DDATA;
269 memcpy(dp->i_df.if_u1.if_data, dst, size);
270 dp->i_d.di_size = size;
271 xfs_dir2_sf_check(args);
273 xfs_trans_log_inode(args->trans, dp, logflags);
279 * Add a name to a shortform directory.
280 * There are two algorithms, "easy" and "hard" which we decide on
281 * before changing anything.
282 * Convert to block form if necessary, if the new entry won't fit.
286 xfs_da_args_t *args) /* operation arguments */
288 xfs_inode_t *dp; /* incore directory inode */
289 int error; /* error return value */
290 int incr_isize; /* total change in size */
291 int new_isize; /* di_size after adding name */
292 int objchange; /* changing to 8-byte inodes */
293 xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
294 int pick; /* which algorithm to use */
295 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
296 xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
298 trace_xfs_dir2_sf_addname(args);
300 ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT);
302 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
304 * Make sure the shortform value has some of its header.
306 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
307 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
310 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
311 ASSERT(dp->i_df.if_u1.if_data != NULL);
312 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
313 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
315 * Compute entry (and change in) size.
317 incr_isize = dp->d_ops->sf_entsize(sfp, args->namelen);
321 * Do we have to change to 8 byte inodes?
323 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
325 * Yes, adjust the inode size. old count + (parent + new)
329 ((uint)sizeof(xfs_dir2_ino8_t) -
330 (uint)sizeof(xfs_dir2_ino4_t));
334 new_isize = (int)dp->i_d.di_size + incr_isize;
336 * Won't fit as shortform any more (due to size),
337 * or the pick routine says it won't (due to offset values).
339 if (new_isize > XFS_IFORK_DSIZE(dp) ||
341 xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
343 * Just checking or no space reservation, it doesn't fit.
345 if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
348 * Convert to block form then add the name.
350 error = xfs_dir2_sf_to_block(args);
353 return xfs_dir2_block_addname(args);
356 * Just checking, it fits.
358 if (args->op_flags & XFS_DA_OP_JUSTCHECK)
361 * Do it the easy way - just add it at the end.
364 xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
366 * Do it the hard way - look for a place to insert the new entry.
367 * Convert to 8 byte inode numbers first if necessary.
372 xfs_dir2_sf_toino8(args);
373 xfs_dir2_sf_addname_hard(args, objchange, new_isize);
375 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
380 * Add the new entry the "easy" way.
381 * This is copying the old directory and adding the new entry at the end.
382 * Since it's sorted by "offset" we need room after the last offset
383 * that's already there, and then room to convert to a block directory.
384 * This is already checked by the pick routine.
387 xfs_dir2_sf_addname_easy(
388 xfs_da_args_t *args, /* operation arguments */
389 xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
390 xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
391 int new_isize) /* new directory size */
393 int byteoff; /* byte offset in sf dir */
394 xfs_inode_t *dp; /* incore directory inode */
395 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
399 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
400 byteoff = (int)((char *)sfep - (char *)sfp);
402 * Grow the in-inode space.
404 xfs_idata_realloc(dp, dp->d_ops->sf_entsize(sfp, args->namelen),
407 * Need to set up again due to realloc of the inode data.
409 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
410 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
412 * Fill in the new entry.
414 sfep->namelen = args->namelen;
415 xfs_dir2_sf_put_offset(sfep, offset);
416 memcpy(sfep->name, args->name, sfep->namelen);
417 dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
418 dp->d_ops->sf_put_ftype(sfep, args->filetype);
421 * Update the header and inode.
424 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
426 dp->i_d.di_size = new_isize;
427 xfs_dir2_sf_check(args);
431 * Add the new entry the "hard" way.
432 * The caller has already converted to 8 byte inode numbers if necessary,
433 * in which case we need to leave the i8count at 1.
434 * Find a hole that the new entry will fit into, and copy
435 * the first part of the entries, the new entry, and the last part of
440 xfs_dir2_sf_addname_hard(
441 xfs_da_args_t *args, /* operation arguments */
442 int objchange, /* changing inode number size */
443 int new_isize) /* new directory size */
445 int add_datasize; /* data size need for new ent */
446 char *buf; /* buffer for old */
447 xfs_inode_t *dp; /* incore directory inode */
448 int eof; /* reached end of old dir */
449 int nbytes; /* temp for byte copies */
450 xfs_dir2_data_aoff_t new_offset; /* next offset value */
451 xfs_dir2_data_aoff_t offset; /* current offset value */
452 int old_isize; /* previous di_size */
453 xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
454 xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */
455 xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
456 xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
457 struct xfs_mount *mp;
460 * Copy the old directory to the stack buffer.
465 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
466 old_isize = (int)dp->i_d.di_size;
467 buf = kmem_alloc(old_isize, KM_SLEEP);
468 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
469 memcpy(oldsfp, sfp, old_isize);
471 * Loop over the old directory finding the place we're going
472 * to insert the new entry.
473 * If it's going to end up at the end then oldsfep will point there.
475 for (offset = dp->d_ops->data_first_offset,
476 oldsfep = xfs_dir2_sf_firstentry(oldsfp),
477 add_datasize = dp->d_ops->data_entsize(args->namelen),
478 eof = (char *)oldsfep == &buf[old_isize];
480 offset = new_offset + dp->d_ops->data_entsize(oldsfep->namelen),
481 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep),
482 eof = (char *)oldsfep == &buf[old_isize]) {
483 new_offset = xfs_dir2_sf_get_offset(oldsfep);
484 if (offset + add_datasize <= new_offset)
488 * Get rid of the old directory, then allocate space for
489 * the new one. We do this so xfs_idata_realloc won't copy
492 xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
493 xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
495 * Reset the pointer since the buffer was reallocated.
497 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
499 * Copy the first part of the directory, including the header.
501 nbytes = (int)((char *)oldsfep - (char *)oldsfp);
502 memcpy(sfp, oldsfp, nbytes);
503 sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
505 * Fill in the new entry, and update the header counts.
507 sfep->namelen = args->namelen;
508 xfs_dir2_sf_put_offset(sfep, offset);
509 memcpy(sfep->name, args->name, sfep->namelen);
510 dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
511 dp->d_ops->sf_put_ftype(sfep, args->filetype);
513 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
516 * If there's more left to copy, do that.
519 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
520 memcpy(sfep, oldsfep, old_isize - nbytes);
523 dp->i_d.di_size = new_isize;
524 xfs_dir2_sf_check(args);
528 * Decide if the new entry will fit at all.
529 * If it will fit, pick between adding the new entry to the end (easy)
530 * or somewhere else (hard).
531 * Return 0 (won't fit), 1 (easy), 2 (hard).
534 static int /* pick result */
535 xfs_dir2_sf_addname_pick(
536 xfs_da_args_t *args, /* operation arguments */
537 int objchange, /* inode # size changes */
538 xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
539 xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
541 xfs_inode_t *dp; /* incore directory inode */
542 int holefit; /* found hole it will fit in */
543 int i; /* entry number */
544 xfs_mount_t *mp; /* filesystem mount point */
545 xfs_dir2_data_aoff_t offset; /* data block offset */
546 xfs_dir2_sf_entry_t *sfep; /* shortform entry */
547 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
548 int size; /* entry's data size */
549 int used; /* data bytes used */
554 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
555 size = dp->d_ops->data_entsize(args->namelen);
556 offset = dp->d_ops->data_first_offset;
557 sfep = xfs_dir2_sf_firstentry(sfp);
560 * Loop over sf entries.
561 * Keep track of data offset and whether we've seen a place
562 * to insert the new entry.
564 for (i = 0; i < sfp->count; i++) {
566 holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
567 offset = xfs_dir2_sf_get_offset(sfep) +
568 dp->d_ops->data_entsize(sfep->namelen);
569 sfep = dp->d_ops->sf_nextentry(sfp, sfep);
572 * Calculate data bytes used excluding the new entry, if this
573 * was a data block (block form directory).
576 (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
577 (uint)sizeof(xfs_dir2_block_tail_t);
579 * If it won't fit in a block form then we can't insert it,
580 * we'll go back, convert to block, then try the insert and convert
583 if (used + (holefit ? 0 : size) > args->geo->blksize)
586 * If changing the inode number size, do it the hard way.
591 * If it won't fit at the end then do it the hard way (use the hole).
593 if (used + size > args->geo->blksize)
596 * Do it the easy way.
605 * Check consistency of shortform directory, assert if bad.
609 xfs_da_args_t *args) /* operation arguments */
611 xfs_inode_t *dp; /* incore directory inode */
612 int i; /* entry number */
613 int i8count; /* number of big inode#s */
614 xfs_ino_t ino; /* entry inode number */
615 int offset; /* data offset */
616 xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
617 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
618 struct xfs_mount *mp;
623 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
624 offset = dp->d_ops->data_first_offset;
625 ino = dp->d_ops->sf_get_parent_ino(sfp);
626 i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
628 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
630 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
631 ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
632 ino = dp->d_ops->sf_get_ino(sfp, sfep);
633 i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
635 xfs_dir2_sf_get_offset(sfep) +
636 dp->d_ops->data_entsize(sfep->namelen);
637 ASSERT(dp->d_ops->sf_get_ftype(sfep) < XFS_DIR3_FT_MAX);
639 ASSERT(i8count == sfp->i8count);
640 ASSERT((char *)sfep - (char *)sfp == dp->i_d.di_size);
642 (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
643 (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize);
648 * Create a new (shortform) directory.
650 int /* error, always 0 */
652 xfs_da_args_t *args, /* operation arguments */
653 xfs_ino_t pino) /* parent inode number */
655 xfs_inode_t *dp; /* incore directory inode */
656 int i8count; /* parent inode is an 8-byte number */
657 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
658 int size; /* directory size */
660 trace_xfs_dir2_sf_create(args);
665 ASSERT(dp->i_d.di_size == 0);
667 * If it's currently a zero-length extent file,
668 * convert it to local format.
670 if (dp->i_d.di_format == XFS_DINODE_FMT_EXTENTS) {
671 dp->i_df.if_flags &= ~XFS_IFEXTENTS; /* just in case */
672 dp->i_d.di_format = XFS_DINODE_FMT_LOCAL;
673 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
674 dp->i_df.if_flags |= XFS_IFINLINE;
676 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
677 ASSERT(dp->i_df.if_bytes == 0);
678 i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
679 size = xfs_dir2_sf_hdr_size(i8count);
681 * Make a buffer for the data.
683 xfs_idata_realloc(dp, size, XFS_DATA_FORK);
685 * Fill in the header,
687 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
688 sfp->i8count = i8count;
690 * Now can put in the inode number, since i8count is set.
692 dp->d_ops->sf_put_parent_ino(sfp, pino);
694 dp->i_d.di_size = size;
695 xfs_dir2_sf_check(args);
696 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
701 * Lookup an entry in a shortform directory.
702 * Returns EEXIST if found, ENOENT if not found.
706 xfs_da_args_t *args) /* operation arguments */
708 xfs_inode_t *dp; /* incore directory inode */
709 int i; /* entry index */
711 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
712 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
713 enum xfs_dacmp cmp; /* comparison result */
714 xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
716 trace_xfs_dir2_sf_lookup(args);
718 xfs_dir2_sf_check(args);
721 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
723 * Bail out if the directory is way too short.
725 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
726 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
729 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
730 ASSERT(dp->i_df.if_u1.if_data != NULL);
731 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
732 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
736 if (args->namelen == 1 && args->name[0] == '.') {
737 args->inumber = dp->i_ino;
738 args->cmpresult = XFS_CMP_EXACT;
739 args->filetype = XFS_DIR3_FT_DIR;
743 * Special case for ..
745 if (args->namelen == 2 &&
746 args->name[0] == '.' && args->name[1] == '.') {
747 args->inumber = dp->d_ops->sf_get_parent_ino(sfp);
748 args->cmpresult = XFS_CMP_EXACT;
749 args->filetype = XFS_DIR3_FT_DIR;
753 * Loop over all the entries trying to match ours.
756 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
757 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
759 * Compare name and if it's an exact match, return the inode
760 * number. If it's the first case-insensitive match, store the
761 * inode number and continue looking for an exact match.
763 cmp = dp->i_mount->m_dirnameops->compname(args, sfep->name,
765 if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
766 args->cmpresult = cmp;
767 args->inumber = dp->d_ops->sf_get_ino(sfp, sfep);
768 args->filetype = dp->d_ops->sf_get_ftype(sfep);
769 if (cmp == XFS_CMP_EXACT)
774 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
776 * Here, we can only be doing a lookup (not a rename or replace).
777 * If a case-insensitive match was not found, return -ENOENT.
781 /* otherwise process the CI match as required by the caller */
782 error = xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
787 * Remove an entry from a shortform directory.
790 xfs_dir2_sf_removename(
793 int byteoff; /* offset of removed entry */
794 xfs_inode_t *dp; /* incore directory inode */
795 int entsize; /* this entry's size */
796 int i; /* shortform entry index */
797 int newsize; /* new inode size */
798 int oldsize; /* old inode size */
799 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
800 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
802 trace_xfs_dir2_sf_removename(args);
806 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
807 oldsize = (int)dp->i_d.di_size;
809 * Bail out if the directory is way too short.
811 if (oldsize < offsetof(xfs_dir2_sf_hdr_t, parent)) {
812 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
815 ASSERT(dp->i_df.if_bytes == oldsize);
816 ASSERT(dp->i_df.if_u1.if_data != NULL);
817 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
818 ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count));
820 * Loop over the old directory entries.
821 * Find the one we're deleting.
823 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
824 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
825 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
827 ASSERT(dp->d_ops->sf_get_ino(sfp, sfep) ==
840 byteoff = (int)((char *)sfep - (char *)sfp);
841 entsize = dp->d_ops->sf_entsize(sfp, args->namelen);
842 newsize = oldsize - entsize;
844 * Copy the part if any after the removed entry, sliding it down.
846 if (byteoff + entsize < oldsize)
847 memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
848 oldsize - (byteoff + entsize));
850 * Fix up the header and file size.
853 dp->i_d.di_size = newsize;
855 * Reallocate, making it smaller.
857 xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
858 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
860 * Are we changing inode number size?
862 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
863 if (sfp->i8count == 1)
864 xfs_dir2_sf_toino4(args);
868 xfs_dir2_sf_check(args);
869 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
874 * Replace the inode number of an entry in a shortform directory.
878 xfs_da_args_t *args) /* operation arguments */
880 xfs_inode_t *dp; /* incore directory inode */
881 int i; /* entry index */
882 xfs_ino_t ino=0; /* entry old inode number */
883 int i8elevated; /* sf_toino8 set i8count=1 */
884 xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
885 xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
887 trace_xfs_dir2_sf_replace(args);
891 ASSERT(dp->i_df.if_flags & XFS_IFINLINE);
893 * Bail out if the shortform directory is way too small.
895 if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
896 ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount));
899 ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
900 ASSERT(dp->i_df.if_u1.if_data != NULL);
901 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
902 ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
905 * New inode number is large, and need to convert to 8-byte inodes.
907 if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
908 int error; /* error return value */
909 int newsize; /* new inode size */
914 ((uint)sizeof(xfs_dir2_ino8_t) -
915 (uint)sizeof(xfs_dir2_ino4_t));
917 * Won't fit as shortform, convert to block then do replace.
919 if (newsize > XFS_IFORK_DSIZE(dp)) {
920 error = xfs_dir2_sf_to_block(args);
924 return xfs_dir2_block_replace(args);
927 * Still fits, convert to 8-byte now.
929 xfs_dir2_sf_toino8(args);
931 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
935 ASSERT(args->namelen != 1 || args->name[0] != '.');
937 * Replace ..'s entry.
939 if (args->namelen == 2 &&
940 args->name[0] == '.' && args->name[1] == '.') {
941 ino = dp->d_ops->sf_get_parent_ino(sfp);
942 ASSERT(args->inumber != ino);
943 dp->d_ops->sf_put_parent_ino(sfp, args->inumber);
946 * Normal entry, look for the name.
949 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
950 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep)) {
951 if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
953 ino = dp->d_ops->sf_get_ino(sfp, sfep);
954 ASSERT(args->inumber != ino);
955 dp->d_ops->sf_put_ino(sfp, sfep, args->inumber);
956 dp->d_ops->sf_put_ftype(sfep, args->filetype);
963 if (i == sfp->count) {
964 ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
966 xfs_dir2_sf_toino4(args);
971 * See if the old number was large, the new number is small.
973 if (ino > XFS_DIR2_MAX_SHORT_INUM &&
974 args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
976 * And the old count was one, so need to convert to small.
978 if (sfp->i8count == 1)
979 xfs_dir2_sf_toino4(args);
984 * See if the old number was small, the new number is large.
986 if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
987 args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
989 * add to the i8count unless we just converted to 8-byte
990 * inodes (which does an implied i8count = 1)
992 ASSERT(sfp->i8count != 0);
996 xfs_dir2_sf_check(args);
997 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1002 * Convert from 8-byte inode numbers to 4-byte inode numbers.
1003 * The last 8-byte inode number is gone, but the count is still 1.
1007 xfs_da_args_t *args) /* operation arguments */
1009 char *buf; /* old dir's buffer */
1010 xfs_inode_t *dp; /* incore directory inode */
1011 int i; /* entry index */
1012 int newsize; /* new inode size */
1013 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1014 xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1015 int oldsize; /* old inode size */
1016 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1017 xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1018 struct xfs_mount *mp;
1020 trace_xfs_dir2_sf_toino4(args);
1026 * Copy the old directory to the buffer.
1027 * Then nuke it from the inode, and add the new buffer to the inode.
1028 * Don't want xfs_idata_realloc copying the data here.
1030 oldsize = dp->i_df.if_bytes;
1031 buf = kmem_alloc(oldsize, KM_SLEEP);
1032 oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1033 ASSERT(oldsfp->i8count == 1);
1034 memcpy(buf, oldsfp, oldsize);
1036 * Compute the new inode size.
1040 (oldsfp->count + 1) *
1041 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1042 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1043 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1045 * Reset our pointers, the data has moved.
1047 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1048 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1050 * Fill in the new header.
1052 sfp->count = oldsfp->count;
1054 dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp));
1056 * Copy the entries field by field.
1058 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1059 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1061 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
1062 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
1063 sfep->namelen = oldsfep->namelen;
1064 sfep->offset = oldsfep->offset;
1065 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1066 dp->d_ops->sf_put_ino(sfp, sfep,
1067 dp->d_ops->sf_get_ino(oldsfp, oldsfep));
1068 dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep));
1071 * Clean up the inode.
1074 dp->i_d.di_size = newsize;
1075 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1079 * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers.
1080 * The new entry w/ an 8-byte inode number is not there yet; we leave with
1081 * i8count set to 1, but no corresponding 8-byte entry.
1085 xfs_da_args_t *args) /* operation arguments */
1087 char *buf; /* old dir's buffer */
1088 xfs_inode_t *dp; /* incore directory inode */
1089 int i; /* entry index */
1090 int newsize; /* new inode size */
1091 xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1092 xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1093 int oldsize; /* old inode size */
1094 xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1095 xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1096 struct xfs_mount *mp;
1098 trace_xfs_dir2_sf_toino8(args);
1104 * Copy the old directory to the buffer.
1105 * Then nuke it from the inode, and add the new buffer to the inode.
1106 * Don't want xfs_idata_realloc copying the data here.
1108 oldsize = dp->i_df.if_bytes;
1109 buf = kmem_alloc(oldsize, KM_SLEEP);
1110 oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1111 ASSERT(oldsfp->i8count == 0);
1112 memcpy(buf, oldsfp, oldsize);
1114 * Compute the new inode size (nb: entry count + 1 for parent)
1118 (oldsfp->count + 1) *
1119 ((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t));
1120 xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1121 xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1123 * Reset our pointers, the data has moved.
1125 oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1126 sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1128 * Fill in the new header.
1130 sfp->count = oldsfp->count;
1132 dp->d_ops->sf_put_parent_ino(sfp, dp->d_ops->sf_get_parent_ino(oldsfp));
1134 * Copy the entries field by field.
1136 for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1137 oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1139 i++, sfep = dp->d_ops->sf_nextentry(sfp, sfep),
1140 oldsfep = dp->d_ops->sf_nextentry(oldsfp, oldsfep)) {
1141 sfep->namelen = oldsfep->namelen;
1142 sfep->offset = oldsfep->offset;
1143 memcpy(sfep->name, oldsfep->name, sfep->namelen);
1144 dp->d_ops->sf_put_ino(sfp, sfep,
1145 dp->d_ops->sf_get_ino(oldsfp, oldsfep));
1146 dp->d_ops->sf_put_ftype(sfep, dp->d_ops->sf_get_ftype(oldsfep));
1149 * Clean up the inode.
1152 dp->i_d.di_size = newsize;
1153 xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);