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"
22 #include "xfs_trans.h"
25 #include "xfs_mount.h"
26 #include "xfs_da_btree.h"
27 #include "xfs_bmap_btree.h"
28 #include "xfs_dinode.h"
29 #include "xfs_inode.h"
30 #include "xfs_inode_item.h"
31 #include "xfs_error.h"
32 #include "xfs_dir2_format.h"
34 #include "xfs_dir2_priv.h"
35 #include "xfs_trace.h"
38 * Prototypes for internal functions.
40 static void xfs_dir2_sf_addname_easy(xfs_da_args_t
*args
,
41 xfs_dir2_sf_entry_t
*sfep
,
42 xfs_dir2_data_aoff_t offset
,
44 static void xfs_dir2_sf_addname_hard(xfs_da_args_t
*args
, int objchange
,
46 static int xfs_dir2_sf_addname_pick(xfs_da_args_t
*args
, int objchange
,
47 xfs_dir2_sf_entry_t
**sfepp
,
48 xfs_dir2_data_aoff_t
*offsetp
);
50 static void xfs_dir2_sf_check(xfs_da_args_t
*args
);
52 #define xfs_dir2_sf_check(args)
55 static void xfs_dir2_sf_toino4(xfs_da_args_t
*args
);
56 static void xfs_dir2_sf_toino8(xfs_da_args_t
*args
);
57 #endif /* XFS_BIG_INUMS */
60 * Inode numbers in short-form directories can come in two versions,
61 * either 4 bytes or 8 bytes wide. These helpers deal with the
62 * two forms transparently by looking at the headers i8count field.
64 * For 64-bit inode number the most significant byte must be zero.
68 struct xfs_dir2_sf_hdr
*hdr
,
69 xfs_dir2_inou_t
*from
)
72 return get_unaligned_be64(&from
->i8
.i
) & 0x00ffffffffffffffULL
;
74 return get_unaligned_be32(&from
->i4
.i
);
79 struct xfs_dir2_sf_hdr
*hdr
,
83 ASSERT((ino
& 0xff00000000000000ULL
) == 0);
86 put_unaligned_be64(ino
, &to
->i8
.i
);
88 put_unaligned_be32(ino
, &to
->i4
.i
);
92 xfs_dir2_sf_get_parent_ino(
93 struct xfs_dir2_sf_hdr
*hdr
)
95 return xfs_dir2_sf_get_ino(hdr
, &hdr
->parent
);
99 xfs_dir2_sf_put_parent_ino(
100 struct xfs_dir2_sf_hdr
*hdr
,
103 xfs_dir2_sf_put_ino(hdr
, &hdr
->parent
, ino
);
107 * In short-form directory entries the inode numbers are stored at variable
108 * offset behind the entry name. If the entry stores a filetype value, then it
109 * sits between the name and the inode number. Hence the inode numbers may only
110 * be accessed through the helpers below.
112 static xfs_dir2_inou_t
*
114 struct xfs_mount
*mp
,
115 struct xfs_dir2_sf_entry
*sfep
)
117 __uint8_t
*ptr
= &sfep
->name
[sfep
->namelen
];
118 if (xfs_sb_version_hasftype(&mp
->m_sb
))
120 return (xfs_dir2_inou_t
*)ptr
;
124 xfs_dir3_sfe_get_ino(
125 struct xfs_mount
*mp
,
126 struct xfs_dir2_sf_hdr
*hdr
,
127 struct xfs_dir2_sf_entry
*sfep
)
129 return xfs_dir2_sf_get_ino(hdr
, xfs_dir3_sfe_inop(mp
, sfep
));
133 xfs_dir3_sfe_put_ino(
134 struct xfs_mount
*mp
,
135 struct xfs_dir2_sf_hdr
*hdr
,
136 struct xfs_dir2_sf_entry
*sfep
,
139 xfs_dir2_sf_put_ino(hdr
, xfs_dir3_sfe_inop(mp
, sfep
), ino
);
143 * Given a block directory (dp/block), calculate its size as a shortform (sf)
144 * directory and a header for the sf directory, if it will fit it the
145 * space currently present in the inode. If it won't fit, the output
146 * size is too big (but not accurate).
148 int /* size for sf form */
149 xfs_dir2_block_sfsize(
150 xfs_inode_t
*dp
, /* incore inode pointer */
151 xfs_dir2_data_hdr_t
*hdr
, /* block directory data */
152 xfs_dir2_sf_hdr_t
*sfhp
) /* output: header for sf form */
154 xfs_dir2_dataptr_t addr
; /* data entry address */
155 xfs_dir2_leaf_entry_t
*blp
; /* leaf area of the block */
156 xfs_dir2_block_tail_t
*btp
; /* tail area of the block */
157 int count
; /* shortform entry count */
158 xfs_dir2_data_entry_t
*dep
; /* data entry in the block */
159 int i
; /* block entry index */
160 int i8count
; /* count of big-inode entries */
161 int isdot
; /* entry is "." */
162 int isdotdot
; /* entry is ".." */
163 xfs_mount_t
*mp
; /* mount structure pointer */
164 int namelen
; /* total name bytes */
165 xfs_ino_t parent
= 0; /* parent inode number */
166 int size
=0; /* total computed size */
172 * if there is a filetype field, add the extra byte to the namelen
173 * for each entry that we see.
175 has_ftype
= xfs_sb_version_hasftype(&mp
->m_sb
) ? 1 : 0;
177 count
= i8count
= namelen
= 0;
178 btp
= xfs_dir2_block_tail_p(mp
, hdr
);
179 blp
= xfs_dir2_block_leaf_p(btp
);
182 * Iterate over the block's data entries by using the leaf pointers.
184 for (i
= 0; i
< be32_to_cpu(btp
->count
); i
++) {
185 if ((addr
= be32_to_cpu(blp
[i
].address
)) == XFS_DIR2_NULL_DATAPTR
)
188 * Calculate the pointer to the entry at hand.
190 dep
= (xfs_dir2_data_entry_t
*)
191 ((char *)hdr
+ xfs_dir2_dataptr_to_off(mp
, addr
));
193 * Detect . and .., so we can special-case them.
194 * . is not included in sf directories.
195 * .. is included by just the parent inode number.
197 isdot
= dep
->namelen
== 1 && dep
->name
[0] == '.';
200 dep
->name
[0] == '.' && dep
->name
[1] == '.';
203 i8count
+= be64_to_cpu(dep
->inumber
) > XFS_DIR2_MAX_SHORT_INUM
;
205 /* take into account the file type field */
206 if (!isdot
&& !isdotdot
) {
208 namelen
+= dep
->namelen
+ has_ftype
;
210 parent
= be64_to_cpu(dep
->inumber
);
212 * Calculate the new size, see if we should give up yet.
214 size
= xfs_dir2_sf_hdr_size(i8count
) + /* header */
215 count
+ /* namelen */
216 count
* (uint
)sizeof(xfs_dir2_sf_off_t
) + /* offset */
218 (i8count
? /* inumber */
219 (uint
)sizeof(xfs_dir2_ino8_t
) * count
:
220 (uint
)sizeof(xfs_dir2_ino4_t
) * count
);
221 if (size
> XFS_IFORK_DSIZE(dp
))
222 return size
; /* size value is a failure */
225 * Create the output header, if it worked.
228 sfhp
->i8count
= i8count
;
229 xfs_dir2_sf_put_parent_ino(sfhp
, parent
);
234 * Convert a block format directory to shortform.
235 * Caller has already checked that it will fit, and built us a header.
238 xfs_dir2_block_to_sf(
239 xfs_da_args_t
*args
, /* operation arguments */
241 int size
, /* shortform directory size */
242 xfs_dir2_sf_hdr_t
*sfhp
) /* shortform directory hdr */
244 xfs_dir2_data_hdr_t
*hdr
; /* block header */
245 xfs_dir2_block_tail_t
*btp
; /* block tail pointer */
246 xfs_dir2_data_entry_t
*dep
; /* data entry pointer */
247 xfs_inode_t
*dp
; /* incore directory inode */
248 xfs_dir2_data_unused_t
*dup
; /* unused data pointer */
249 char *endptr
; /* end of data entries */
250 int error
; /* error return value */
251 int logflags
; /* inode logging flags */
252 xfs_mount_t
*mp
; /* filesystem mount point */
253 char *ptr
; /* current data pointer */
254 xfs_dir2_sf_entry_t
*sfep
; /* shortform entry */
255 xfs_dir2_sf_hdr_t
*sfp
; /* shortform directory header */
257 trace_xfs_dir2_block_to_sf(args
);
263 * Make a copy of the block data, so we can shrink the inode
264 * and add local data.
266 hdr
= kmem_alloc(mp
->m_dirblksize
, KM_SLEEP
);
267 memcpy(hdr
, bp
->b_addr
, mp
->m_dirblksize
);
268 logflags
= XFS_ILOG_CORE
;
269 if ((error
= xfs_dir2_shrink_inode(args
, mp
->m_dirdatablk
, bp
))) {
270 ASSERT(error
!= ENOSPC
);
275 * The buffer is now unconditionally gone, whether
276 * xfs_dir2_shrink_inode worked or not.
278 * Convert the inode to local format.
280 dp
->i_df
.if_flags
&= ~XFS_IFEXTENTS
;
281 dp
->i_df
.if_flags
|= XFS_IFINLINE
;
282 dp
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
283 ASSERT(dp
->i_df
.if_bytes
== 0);
284 xfs_idata_realloc(dp
, size
, XFS_DATA_FORK
);
285 logflags
|= XFS_ILOG_DDATA
;
287 * Copy the header into the newly allocate local space.
289 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
290 memcpy(sfp
, sfhp
, xfs_dir2_sf_hdr_size(sfhp
->i8count
));
291 dp
->i_d
.di_size
= size
;
293 * Set up to loop over the block's entries.
295 btp
= xfs_dir2_block_tail_p(mp
, hdr
);
296 ptr
= (char *)xfs_dir3_data_entry_p(hdr
);
297 endptr
= (char *)xfs_dir2_block_leaf_p(btp
);
298 sfep
= xfs_dir2_sf_firstentry(sfp
);
300 * Loop over the active and unused entries.
301 * Stop when we reach the leaf/tail portion of the block.
303 while (ptr
< endptr
) {
305 * If it's unused, just skip over it.
307 dup
= (xfs_dir2_data_unused_t
*)ptr
;
308 if (be16_to_cpu(dup
->freetag
) == XFS_DIR2_DATA_FREE_TAG
) {
309 ptr
+= be16_to_cpu(dup
->length
);
312 dep
= (xfs_dir2_data_entry_t
*)ptr
;
316 if (dep
->namelen
== 1 && dep
->name
[0] == '.')
317 ASSERT(be64_to_cpu(dep
->inumber
) == dp
->i_ino
);
319 * Skip .., but make sure the inode number is right.
321 else if (dep
->namelen
== 2 &&
322 dep
->name
[0] == '.' && dep
->name
[1] == '.')
323 ASSERT(be64_to_cpu(dep
->inumber
) ==
324 xfs_dir2_sf_get_parent_ino(sfp
));
326 * Normal entry, copy it into shortform.
329 sfep
->namelen
= dep
->namelen
;
330 xfs_dir2_sf_put_offset(sfep
,
331 (xfs_dir2_data_aoff_t
)
332 ((char *)dep
- (char *)hdr
));
333 memcpy(sfep
->name
, dep
->name
, dep
->namelen
);
334 xfs_dir3_sfe_put_ino(mp
, sfp
, sfep
,
335 be64_to_cpu(dep
->inumber
));
337 sfep
= xfs_dir3_sf_nextentry(mp
, sfp
, sfep
);
339 ptr
+= xfs_dir3_data_entsize(mp
, dep
->namelen
);
341 ASSERT((char *)sfep
- (char *)sfp
== size
);
342 xfs_dir2_sf_check(args
);
344 xfs_trans_log_inode(args
->trans
, dp
, logflags
);
350 * Add a name to a shortform directory.
351 * There are two algorithms, "easy" and "hard" which we decide on
352 * before changing anything.
353 * Convert to block form if necessary, if the new entry won't fit.
357 xfs_da_args_t
*args
) /* operation arguments */
359 int add_entsize
; /* size of the new entry */
360 xfs_inode_t
*dp
; /* incore directory inode */
361 int error
; /* error return value */
362 int incr_isize
; /* total change in size */
363 int new_isize
; /* di_size after adding name */
364 int objchange
; /* changing to 8-byte inodes */
365 xfs_dir2_data_aoff_t offset
= 0; /* offset for new entry */
366 int old_isize
; /* di_size before adding name */
367 int pick
; /* which algorithm to use */
368 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
369 xfs_dir2_sf_entry_t
*sfep
= NULL
; /* shortform entry */
371 trace_xfs_dir2_sf_addname(args
);
373 ASSERT(xfs_dir2_sf_lookup(args
) == ENOENT
);
375 ASSERT(dp
->i_df
.if_flags
& XFS_IFINLINE
);
377 * Make sure the shortform value has some of its header.
379 if (dp
->i_d
.di_size
< offsetof(xfs_dir2_sf_hdr_t
, parent
)) {
380 ASSERT(XFS_FORCED_SHUTDOWN(dp
->i_mount
));
381 return XFS_ERROR(EIO
);
383 ASSERT(dp
->i_df
.if_bytes
== dp
->i_d
.di_size
);
384 ASSERT(dp
->i_df
.if_u1
.if_data
!= NULL
);
385 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
386 ASSERT(dp
->i_d
.di_size
>= xfs_dir2_sf_hdr_size(sfp
->i8count
));
388 * Compute entry (and change in) size.
390 add_entsize
= xfs_dir3_sf_entsize(dp
->i_mount
, sfp
, args
->namelen
);
391 incr_isize
= add_entsize
;
395 * Do we have to change to 8 byte inodes?
397 if (args
->inumber
> XFS_DIR2_MAX_SHORT_INUM
&& sfp
->i8count
== 0) {
399 * Yes, adjust the entry size and the total size.
402 (uint
)sizeof(xfs_dir2_ino8_t
) -
403 (uint
)sizeof(xfs_dir2_ino4_t
);
406 ((uint
)sizeof(xfs_dir2_ino8_t
) -
407 (uint
)sizeof(xfs_dir2_ino4_t
));
411 old_isize
= (int)dp
->i_d
.di_size
;
412 new_isize
= old_isize
+ incr_isize
;
414 * Won't fit as shortform any more (due to size),
415 * or the pick routine says it won't (due to offset values).
417 if (new_isize
> XFS_IFORK_DSIZE(dp
) ||
419 xfs_dir2_sf_addname_pick(args
, objchange
, &sfep
, &offset
)) == 0) {
421 * Just checking or no space reservation, it doesn't fit.
423 if ((args
->op_flags
& XFS_DA_OP_JUSTCHECK
) || args
->total
== 0)
424 return XFS_ERROR(ENOSPC
);
426 * Convert to block form then add the name.
428 error
= xfs_dir2_sf_to_block(args
);
431 return xfs_dir2_block_addname(args
);
434 * Just checking, it fits.
436 if (args
->op_flags
& XFS_DA_OP_JUSTCHECK
)
439 * Do it the easy way - just add it at the end.
442 xfs_dir2_sf_addname_easy(args
, sfep
, offset
, new_isize
);
444 * Do it the hard way - look for a place to insert the new entry.
445 * Convert to 8 byte inode numbers first if necessary.
451 xfs_dir2_sf_toino8(args
);
453 xfs_dir2_sf_addname_hard(args
, objchange
, new_isize
);
455 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_CORE
| XFS_ILOG_DDATA
);
460 * Add the new entry the "easy" way.
461 * This is copying the old directory and adding the new entry at the end.
462 * Since it's sorted by "offset" we need room after the last offset
463 * that's already there, and then room to convert to a block directory.
464 * This is already checked by the pick routine.
467 xfs_dir2_sf_addname_easy(
468 xfs_da_args_t
*args
, /* operation arguments */
469 xfs_dir2_sf_entry_t
*sfep
, /* pointer to new entry */
470 xfs_dir2_data_aoff_t offset
, /* offset to use for new ent */
471 int new_isize
) /* new directory size */
473 int byteoff
; /* byte offset in sf dir */
474 xfs_inode_t
*dp
; /* incore directory inode */
475 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
479 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
480 byteoff
= (int)((char *)sfep
- (char *)sfp
);
482 * Grow the in-inode space.
484 xfs_idata_realloc(dp
,
485 xfs_dir3_sf_entsize(dp
->i_mount
, sfp
, args
->namelen
),
488 * Need to set up again due to realloc of the inode data.
490 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
491 sfep
= (xfs_dir2_sf_entry_t
*)((char *)sfp
+ byteoff
);
493 * Fill in the new entry.
495 sfep
->namelen
= args
->namelen
;
496 xfs_dir2_sf_put_offset(sfep
, offset
);
497 memcpy(sfep
->name
, args
->name
, sfep
->namelen
);
498 xfs_dir3_sfe_put_ino(dp
->i_mount
, sfp
, sfep
, args
->inumber
);
500 * Update the header and inode.
504 if (args
->inumber
> XFS_DIR2_MAX_SHORT_INUM
)
507 dp
->i_d
.di_size
= new_isize
;
508 xfs_dir2_sf_check(args
);
512 * Add the new entry the "hard" way.
513 * The caller has already converted to 8 byte inode numbers if necessary,
514 * in which case we need to leave the i8count at 1.
515 * Find a hole that the new entry will fit into, and copy
516 * the first part of the entries, the new entry, and the last part of
521 xfs_dir2_sf_addname_hard(
522 xfs_da_args_t
*args
, /* operation arguments */
523 int objchange
, /* changing inode number size */
524 int new_isize
) /* new directory size */
526 int add_datasize
; /* data size need for new ent */
527 char *buf
; /* buffer for old */
528 xfs_inode_t
*dp
; /* incore directory inode */
529 int eof
; /* reached end of old dir */
530 int nbytes
; /* temp for byte copies */
531 xfs_dir2_data_aoff_t new_offset
; /* next offset value */
532 xfs_dir2_data_aoff_t offset
; /* current offset value */
533 int old_isize
; /* previous di_size */
534 xfs_dir2_sf_entry_t
*oldsfep
; /* entry in original dir */
535 xfs_dir2_sf_hdr_t
*oldsfp
; /* original shortform dir */
536 xfs_dir2_sf_entry_t
*sfep
; /* entry in new dir */
537 xfs_dir2_sf_hdr_t
*sfp
; /* new shortform dir */
538 struct xfs_mount
*mp
;
541 * Copy the old directory to the stack buffer.
546 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
547 old_isize
= (int)dp
->i_d
.di_size
;
548 buf
= kmem_alloc(old_isize
, KM_SLEEP
);
549 oldsfp
= (xfs_dir2_sf_hdr_t
*)buf
;
550 memcpy(oldsfp
, sfp
, old_isize
);
552 * Loop over the old directory finding the place we're going
553 * to insert the new entry.
554 * If it's going to end up at the end then oldsfep will point there.
556 for (offset
= XFS_DIR3_DATA_FIRST_OFFSET(mp
),
557 oldsfep
= xfs_dir2_sf_firstentry(oldsfp
),
558 add_datasize
= xfs_dir3_data_entsize(mp
, args
->namelen
),
559 eof
= (char *)oldsfep
== &buf
[old_isize
];
561 offset
= new_offset
+ xfs_dir3_data_entsize(mp
, oldsfep
->namelen
),
562 oldsfep
= xfs_dir3_sf_nextentry(mp
, oldsfp
, oldsfep
),
563 eof
= (char *)oldsfep
== &buf
[old_isize
]) {
564 new_offset
= xfs_dir2_sf_get_offset(oldsfep
);
565 if (offset
+ add_datasize
<= new_offset
)
569 * Get rid of the old directory, then allocate space for
570 * the new one. We do this so xfs_idata_realloc won't copy
573 xfs_idata_realloc(dp
, -old_isize
, XFS_DATA_FORK
);
574 xfs_idata_realloc(dp
, new_isize
, XFS_DATA_FORK
);
576 * Reset the pointer since the buffer was reallocated.
578 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
580 * Copy the first part of the directory, including the header.
582 nbytes
= (int)((char *)oldsfep
- (char *)oldsfp
);
583 memcpy(sfp
, oldsfp
, nbytes
);
584 sfep
= (xfs_dir2_sf_entry_t
*)((char *)sfp
+ nbytes
);
586 * Fill in the new entry, and update the header counts.
588 sfep
->namelen
= args
->namelen
;
589 xfs_dir2_sf_put_offset(sfep
, offset
);
590 memcpy(sfep
->name
, args
->name
, sfep
->namelen
);
591 xfs_dir3_sfe_put_ino(mp
, sfp
, sfep
, args
->inumber
);
594 if (args
->inumber
> XFS_DIR2_MAX_SHORT_INUM
&& !objchange
)
598 * If there's more left to copy, do that.
601 sfep
= xfs_dir3_sf_nextentry(mp
, sfp
, sfep
);
602 memcpy(sfep
, oldsfep
, old_isize
- nbytes
);
605 dp
->i_d
.di_size
= new_isize
;
606 xfs_dir2_sf_check(args
);
610 * Decide if the new entry will fit at all.
611 * If it will fit, pick between adding the new entry to the end (easy)
612 * or somewhere else (hard).
613 * Return 0 (won't fit), 1 (easy), 2 (hard).
616 static int /* pick result */
617 xfs_dir2_sf_addname_pick(
618 xfs_da_args_t
*args
, /* operation arguments */
619 int objchange
, /* inode # size changes */
620 xfs_dir2_sf_entry_t
**sfepp
, /* out(1): new entry ptr */
621 xfs_dir2_data_aoff_t
*offsetp
) /* out(1): new offset */
623 xfs_inode_t
*dp
; /* incore directory inode */
624 int holefit
; /* found hole it will fit in */
625 int i
; /* entry number */
626 xfs_mount_t
*mp
; /* filesystem mount point */
627 xfs_dir2_data_aoff_t offset
; /* data block offset */
628 xfs_dir2_sf_entry_t
*sfep
; /* shortform entry */
629 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
630 int size
; /* entry's data size */
631 int used
; /* data bytes used */
636 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
637 size
= xfs_dir3_data_entsize(mp
, args
->namelen
);
638 offset
= XFS_DIR3_DATA_FIRST_OFFSET(mp
);
639 sfep
= xfs_dir2_sf_firstentry(sfp
);
642 * Loop over sf entries.
643 * Keep track of data offset and whether we've seen a place
644 * to insert the new entry.
646 for (i
= 0; i
< sfp
->count
; i
++) {
648 holefit
= offset
+ size
<= xfs_dir2_sf_get_offset(sfep
);
649 offset
= xfs_dir2_sf_get_offset(sfep
) +
650 xfs_dir3_data_entsize(mp
, sfep
->namelen
);
651 sfep
= xfs_dir3_sf_nextentry(mp
, sfp
, sfep
);
654 * Calculate data bytes used excluding the new entry, if this
655 * was a data block (block form directory).
658 (sfp
->count
+ 3) * (uint
)sizeof(xfs_dir2_leaf_entry_t
) +
659 (uint
)sizeof(xfs_dir2_block_tail_t
);
661 * If it won't fit in a block form then we can't insert it,
662 * we'll go back, convert to block, then try the insert and convert
665 if (used
+ (holefit
? 0 : size
) > mp
->m_dirblksize
)
668 * If changing the inode number size, do it the hard way.
675 ASSERT(objchange
== 0);
678 * If it won't fit at the end then do it the hard way (use the hole).
680 if (used
+ size
> mp
->m_dirblksize
)
683 * Do it the easy way.
692 * Check consistency of shortform directory, assert if bad.
696 xfs_da_args_t
*args
) /* operation arguments */
698 xfs_inode_t
*dp
; /* incore directory inode */
699 int i
; /* entry number */
700 int i8count
; /* number of big inode#s */
701 xfs_ino_t ino
; /* entry inode number */
702 int offset
; /* data offset */
703 xfs_dir2_sf_entry_t
*sfep
; /* shortform dir entry */
704 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
705 struct xfs_mount
*mp
;
710 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
711 offset
= XFS_DIR3_DATA_FIRST_OFFSET(mp
);
712 ino
= xfs_dir2_sf_get_parent_ino(sfp
);
713 i8count
= ino
> XFS_DIR2_MAX_SHORT_INUM
;
715 for (i
= 0, sfep
= xfs_dir2_sf_firstentry(sfp
);
717 i
++, sfep
= xfs_dir3_sf_nextentry(mp
, sfp
, sfep
)) {
718 ASSERT(xfs_dir2_sf_get_offset(sfep
) >= offset
);
719 ino
= xfs_dir3_sfe_get_ino(mp
, sfp
, sfep
);
720 i8count
+= ino
> XFS_DIR2_MAX_SHORT_INUM
;
722 xfs_dir2_sf_get_offset(sfep
) +
723 xfs_dir3_data_entsize(mp
, sfep
->namelen
);
724 ASSERT(xfs_dir3_sfe_get_ftype(mp
, sfp
, sfep
) <
727 ASSERT(i8count
== sfp
->i8count
);
728 ASSERT(XFS_BIG_INUMS
|| i8count
== 0);
729 ASSERT((char *)sfep
- (char *)sfp
== dp
->i_d
.di_size
);
731 (sfp
->count
+ 2) * (uint
)sizeof(xfs_dir2_leaf_entry_t
) +
732 (uint
)sizeof(xfs_dir2_block_tail_t
) <= mp
->m_dirblksize
);
737 * Create a new (shortform) directory.
739 int /* error, always 0 */
741 xfs_da_args_t
*args
, /* operation arguments */
742 xfs_ino_t pino
) /* parent inode number */
744 xfs_inode_t
*dp
; /* incore directory inode */
745 int i8count
; /* parent inode is an 8-byte number */
746 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
747 int size
; /* directory size */
749 trace_xfs_dir2_sf_create(args
);
754 ASSERT(dp
->i_d
.di_size
== 0);
756 * If it's currently a zero-length extent file,
757 * convert it to local format.
759 if (dp
->i_d
.di_format
== XFS_DINODE_FMT_EXTENTS
) {
760 dp
->i_df
.if_flags
&= ~XFS_IFEXTENTS
; /* just in case */
761 dp
->i_d
.di_format
= XFS_DINODE_FMT_LOCAL
;
762 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_CORE
);
763 dp
->i_df
.if_flags
|= XFS_IFINLINE
;
765 ASSERT(dp
->i_df
.if_flags
& XFS_IFINLINE
);
766 ASSERT(dp
->i_df
.if_bytes
== 0);
767 i8count
= pino
> XFS_DIR2_MAX_SHORT_INUM
;
768 size
= xfs_dir2_sf_hdr_size(i8count
);
770 * Make a buffer for the data.
772 xfs_idata_realloc(dp
, size
, XFS_DATA_FORK
);
774 * Fill in the header,
776 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
777 sfp
->i8count
= i8count
;
779 * Now can put in the inode number, since i8count is set.
781 xfs_dir2_sf_put_parent_ino(sfp
, pino
);
783 dp
->i_d
.di_size
= size
;
784 xfs_dir2_sf_check(args
);
785 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_CORE
| XFS_ILOG_DDATA
);
790 * Lookup an entry in a shortform directory.
791 * Returns EEXIST if found, ENOENT if not found.
795 xfs_da_args_t
*args
) /* operation arguments */
797 xfs_inode_t
*dp
; /* incore directory inode */
798 int i
; /* entry index */
800 xfs_dir2_sf_entry_t
*sfep
; /* shortform directory entry */
801 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
802 enum xfs_dacmp cmp
; /* comparison result */
803 xfs_dir2_sf_entry_t
*ci_sfep
; /* case-insens. entry */
805 trace_xfs_dir2_sf_lookup(args
);
807 xfs_dir2_sf_check(args
);
810 ASSERT(dp
->i_df
.if_flags
& XFS_IFINLINE
);
812 * Bail out if the directory is way too short.
814 if (dp
->i_d
.di_size
< offsetof(xfs_dir2_sf_hdr_t
, parent
)) {
815 ASSERT(XFS_FORCED_SHUTDOWN(dp
->i_mount
));
816 return XFS_ERROR(EIO
);
818 ASSERT(dp
->i_df
.if_bytes
== dp
->i_d
.di_size
);
819 ASSERT(dp
->i_df
.if_u1
.if_data
!= NULL
);
820 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
821 ASSERT(dp
->i_d
.di_size
>= xfs_dir2_sf_hdr_size(sfp
->i8count
));
825 if (args
->namelen
== 1 && args
->name
[0] == '.') {
826 args
->inumber
= dp
->i_ino
;
827 args
->cmpresult
= XFS_CMP_EXACT
;
828 return XFS_ERROR(EEXIST
);
831 * Special case for ..
833 if (args
->namelen
== 2 &&
834 args
->name
[0] == '.' && args
->name
[1] == '.') {
835 args
->inumber
= xfs_dir2_sf_get_parent_ino(sfp
);
836 args
->cmpresult
= XFS_CMP_EXACT
;
837 return XFS_ERROR(EEXIST
);
840 * Loop over all the entries trying to match ours.
843 for (i
= 0, sfep
= xfs_dir2_sf_firstentry(sfp
); i
< sfp
->count
;
844 i
++, sfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, sfp
, sfep
)) {
846 * Compare name and if it's an exact match, return the inode
847 * number. If it's the first case-insensitive match, store the
848 * inode number and continue looking for an exact match.
850 cmp
= dp
->i_mount
->m_dirnameops
->compname(args
, sfep
->name
,
852 if (cmp
!= XFS_CMP_DIFFERENT
&& cmp
!= args
->cmpresult
) {
853 args
->cmpresult
= cmp
;
854 args
->inumber
= xfs_dir3_sfe_get_ino(dp
->i_mount
,
856 if (cmp
== XFS_CMP_EXACT
)
857 return XFS_ERROR(EEXIST
);
861 ASSERT(args
->op_flags
& XFS_DA_OP_OKNOENT
);
863 * Here, we can only be doing a lookup (not a rename or replace).
864 * If a case-insensitive match was not found, return ENOENT.
867 return XFS_ERROR(ENOENT
);
868 /* otherwise process the CI match as required by the caller */
869 error
= xfs_dir_cilookup_result(args
, ci_sfep
->name
, ci_sfep
->namelen
);
870 return XFS_ERROR(error
);
874 * Remove an entry from a shortform directory.
877 xfs_dir2_sf_removename(
880 int byteoff
; /* offset of removed entry */
881 xfs_inode_t
*dp
; /* incore directory inode */
882 int entsize
; /* this entry's size */
883 int i
; /* shortform entry index */
884 int newsize
; /* new inode size */
885 int oldsize
; /* old inode size */
886 xfs_dir2_sf_entry_t
*sfep
; /* shortform directory entry */
887 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
889 trace_xfs_dir2_sf_removename(args
);
893 ASSERT(dp
->i_df
.if_flags
& XFS_IFINLINE
);
894 oldsize
= (int)dp
->i_d
.di_size
;
896 * Bail out if the directory is way too short.
898 if (oldsize
< offsetof(xfs_dir2_sf_hdr_t
, parent
)) {
899 ASSERT(XFS_FORCED_SHUTDOWN(dp
->i_mount
));
900 return XFS_ERROR(EIO
);
902 ASSERT(dp
->i_df
.if_bytes
== oldsize
);
903 ASSERT(dp
->i_df
.if_u1
.if_data
!= NULL
);
904 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
905 ASSERT(oldsize
>= xfs_dir2_sf_hdr_size(sfp
->i8count
));
907 * Loop over the old directory entries.
908 * Find the one we're deleting.
910 for (i
= 0, sfep
= xfs_dir2_sf_firstentry(sfp
); i
< sfp
->count
;
911 i
++, sfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, sfp
, sfep
)) {
912 if (xfs_da_compname(args
, sfep
->name
, sfep
->namelen
) ==
914 ASSERT(xfs_dir3_sfe_get_ino(dp
->i_mount
, sfp
, sfep
) ==
923 return XFS_ERROR(ENOENT
);
927 byteoff
= (int)((char *)sfep
- (char *)sfp
);
928 entsize
= xfs_dir3_sf_entsize(dp
->i_mount
, sfp
, args
->namelen
);
929 newsize
= oldsize
- entsize
;
931 * Copy the part if any after the removed entry, sliding it down.
933 if (byteoff
+ entsize
< oldsize
)
934 memmove((char *)sfp
+ byteoff
, (char *)sfp
+ byteoff
+ entsize
,
935 oldsize
- (byteoff
+ entsize
));
937 * Fix up the header and file size.
940 dp
->i_d
.di_size
= newsize
;
942 * Reallocate, making it smaller.
944 xfs_idata_realloc(dp
, newsize
- oldsize
, XFS_DATA_FORK
);
945 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
948 * Are we changing inode number size?
950 if (args
->inumber
> XFS_DIR2_MAX_SHORT_INUM
) {
951 if (sfp
->i8count
== 1)
952 xfs_dir2_sf_toino4(args
);
957 xfs_dir2_sf_check(args
);
958 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_CORE
| XFS_ILOG_DDATA
);
963 * Replace the inode number of an entry in a shortform directory.
967 xfs_da_args_t
*args
) /* operation arguments */
969 xfs_inode_t
*dp
; /* incore directory inode */
970 int i
; /* entry index */
971 #if XFS_BIG_INUMS || defined(DEBUG)
972 xfs_ino_t ino
=0; /* entry old inode number */
975 int i8elevated
; /* sf_toino8 set i8count=1 */
977 xfs_dir2_sf_entry_t
*sfep
; /* shortform directory entry */
978 xfs_dir2_sf_hdr_t
*sfp
; /* shortform structure */
980 trace_xfs_dir2_sf_replace(args
);
984 ASSERT(dp
->i_df
.if_flags
& XFS_IFINLINE
);
986 * Bail out if the shortform directory is way too small.
988 if (dp
->i_d
.di_size
< offsetof(xfs_dir2_sf_hdr_t
, parent
)) {
989 ASSERT(XFS_FORCED_SHUTDOWN(dp
->i_mount
));
990 return XFS_ERROR(EIO
);
992 ASSERT(dp
->i_df
.if_bytes
== dp
->i_d
.di_size
);
993 ASSERT(dp
->i_df
.if_u1
.if_data
!= NULL
);
994 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
995 ASSERT(dp
->i_d
.di_size
>= xfs_dir2_sf_hdr_size(sfp
->i8count
));
998 * New inode number is large, and need to convert to 8-byte inodes.
1000 if (args
->inumber
> XFS_DIR2_MAX_SHORT_INUM
&& sfp
->i8count
== 0) {
1001 int error
; /* error return value */
1002 int newsize
; /* new inode size */
1007 ((uint
)sizeof(xfs_dir2_ino8_t
) -
1008 (uint
)sizeof(xfs_dir2_ino4_t
));
1010 * Won't fit as shortform, convert to block then do replace.
1012 if (newsize
> XFS_IFORK_DSIZE(dp
)) {
1013 error
= xfs_dir2_sf_to_block(args
);
1017 return xfs_dir2_block_replace(args
);
1020 * Still fits, convert to 8-byte now.
1022 xfs_dir2_sf_toino8(args
);
1024 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
1028 ASSERT(args
->namelen
!= 1 || args
->name
[0] != '.');
1030 * Replace ..'s entry.
1032 if (args
->namelen
== 2 &&
1033 args
->name
[0] == '.' && args
->name
[1] == '.') {
1034 #if XFS_BIG_INUMS || defined(DEBUG)
1035 ino
= xfs_dir2_sf_get_parent_ino(sfp
);
1036 ASSERT(args
->inumber
!= ino
);
1038 xfs_dir2_sf_put_parent_ino(sfp
, args
->inumber
);
1041 * Normal entry, look for the name.
1044 for (i
= 0, sfep
= xfs_dir2_sf_firstentry(sfp
); i
< sfp
->count
;
1045 i
++, sfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, sfp
, sfep
)) {
1046 if (xfs_da_compname(args
, sfep
->name
, sfep
->namelen
) ==
1048 #if XFS_BIG_INUMS || defined(DEBUG)
1049 ino
= xfs_dir3_sfe_get_ino(dp
->i_mount
,
1051 ASSERT(args
->inumber
!= ino
);
1053 xfs_dir3_sfe_put_ino(dp
->i_mount
, sfp
, sfep
,
1061 if (i
== sfp
->count
) {
1062 ASSERT(args
->op_flags
& XFS_DA_OP_OKNOENT
);
1065 xfs_dir2_sf_toino4(args
);
1067 return XFS_ERROR(ENOENT
);
1072 * See if the old number was large, the new number is small.
1074 if (ino
> XFS_DIR2_MAX_SHORT_INUM
&&
1075 args
->inumber
<= XFS_DIR2_MAX_SHORT_INUM
) {
1077 * And the old count was one, so need to convert to small.
1079 if (sfp
->i8count
== 1)
1080 xfs_dir2_sf_toino4(args
);
1085 * See if the old number was small, the new number is large.
1087 if (ino
<= XFS_DIR2_MAX_SHORT_INUM
&&
1088 args
->inumber
> XFS_DIR2_MAX_SHORT_INUM
) {
1090 * add to the i8count unless we just converted to 8-byte
1091 * inodes (which does an implied i8count = 1)
1093 ASSERT(sfp
->i8count
!= 0);
1098 xfs_dir2_sf_check(args
);
1099 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_DDATA
);
1105 * Convert from 8-byte inode numbers to 4-byte inode numbers.
1106 * The last 8-byte inode number is gone, but the count is still 1.
1110 xfs_da_args_t
*args
) /* operation arguments */
1112 char *buf
; /* old dir's buffer */
1113 xfs_inode_t
*dp
; /* incore directory inode */
1114 int i
; /* entry index */
1115 int newsize
; /* new inode size */
1116 xfs_dir2_sf_entry_t
*oldsfep
; /* old sf entry */
1117 xfs_dir2_sf_hdr_t
*oldsfp
; /* old sf directory */
1118 int oldsize
; /* old inode size */
1119 xfs_dir2_sf_entry_t
*sfep
; /* new sf entry */
1120 xfs_dir2_sf_hdr_t
*sfp
; /* new sf directory */
1122 trace_xfs_dir2_sf_toino4(args
);
1127 * Copy the old directory to the buffer.
1128 * Then nuke it from the inode, and add the new buffer to the inode.
1129 * Don't want xfs_idata_realloc copying the data here.
1131 oldsize
= dp
->i_df
.if_bytes
;
1132 buf
= kmem_alloc(oldsize
, KM_SLEEP
);
1133 oldsfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
1134 ASSERT(oldsfp
->i8count
== 1);
1135 memcpy(buf
, oldsfp
, oldsize
);
1137 * Compute the new inode size.
1141 (oldsfp
->count
+ 1) *
1142 ((uint
)sizeof(xfs_dir2_ino8_t
) - (uint
)sizeof(xfs_dir2_ino4_t
));
1143 xfs_idata_realloc(dp
, -oldsize
, XFS_DATA_FORK
);
1144 xfs_idata_realloc(dp
, newsize
, XFS_DATA_FORK
);
1146 * Reset our pointers, the data has moved.
1148 oldsfp
= (xfs_dir2_sf_hdr_t
*)buf
;
1149 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
1151 * Fill in the new header.
1153 sfp
->count
= oldsfp
->count
;
1155 xfs_dir2_sf_put_parent_ino(sfp
, xfs_dir2_sf_get_parent_ino(oldsfp
));
1157 * Copy the entries field by field.
1159 for (i
= 0, sfep
= xfs_dir2_sf_firstentry(sfp
),
1160 oldsfep
= xfs_dir2_sf_firstentry(oldsfp
);
1162 i
++, sfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, sfp
, sfep
),
1163 oldsfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, oldsfp
, oldsfep
)) {
1164 sfep
->namelen
= oldsfep
->namelen
;
1165 sfep
->offset
= oldsfep
->offset
;
1166 memcpy(sfep
->name
, oldsfep
->name
, sfep
->namelen
);
1167 xfs_dir3_sfe_put_ino(dp
->i_mount
, sfp
, sfep
,
1168 xfs_dir3_sfe_get_ino(dp
->i_mount
, oldsfp
, oldsfep
));
1171 * Clean up the inode.
1174 dp
->i_d
.di_size
= newsize
;
1175 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_CORE
| XFS_ILOG_DDATA
);
1179 * Convert from 4-byte inode numbers to 8-byte inode numbers.
1180 * The new 8-byte inode number is not there yet, we leave with the
1181 * count 1 but no corresponding entry.
1185 xfs_da_args_t
*args
) /* operation arguments */
1187 char *buf
; /* old dir's buffer */
1188 xfs_inode_t
*dp
; /* incore directory inode */
1189 int i
; /* entry index */
1190 int newsize
; /* new inode size */
1191 xfs_dir2_sf_entry_t
*oldsfep
; /* old sf entry */
1192 xfs_dir2_sf_hdr_t
*oldsfp
; /* old sf directory */
1193 int oldsize
; /* old inode size */
1194 xfs_dir2_sf_entry_t
*sfep
; /* new sf entry */
1195 xfs_dir2_sf_hdr_t
*sfp
; /* new sf directory */
1197 trace_xfs_dir2_sf_toino8(args
);
1202 * Copy the old directory to the buffer.
1203 * Then nuke it from the inode, and add the new buffer to the inode.
1204 * Don't want xfs_idata_realloc copying the data here.
1206 oldsize
= dp
->i_df
.if_bytes
;
1207 buf
= kmem_alloc(oldsize
, KM_SLEEP
);
1208 oldsfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
1209 ASSERT(oldsfp
->i8count
== 0);
1210 memcpy(buf
, oldsfp
, oldsize
);
1212 * Compute the new inode size.
1216 (oldsfp
->count
+ 1) *
1217 ((uint
)sizeof(xfs_dir2_ino8_t
) - (uint
)sizeof(xfs_dir2_ino4_t
));
1218 xfs_idata_realloc(dp
, -oldsize
, XFS_DATA_FORK
);
1219 xfs_idata_realloc(dp
, newsize
, XFS_DATA_FORK
);
1221 * Reset our pointers, the data has moved.
1223 oldsfp
= (xfs_dir2_sf_hdr_t
*)buf
;
1224 sfp
= (xfs_dir2_sf_hdr_t
*)dp
->i_df
.if_u1
.if_data
;
1226 * Fill in the new header.
1228 sfp
->count
= oldsfp
->count
;
1230 xfs_dir2_sf_put_parent_ino(sfp
, xfs_dir2_sf_get_parent_ino(oldsfp
));
1232 * Copy the entries field by field.
1234 for (i
= 0, sfep
= xfs_dir2_sf_firstentry(sfp
),
1235 oldsfep
= xfs_dir2_sf_firstentry(oldsfp
);
1237 i
++, sfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, sfp
, sfep
),
1238 oldsfep
= xfs_dir3_sf_nextentry(dp
->i_mount
, oldsfp
, oldsfep
)) {
1239 sfep
->namelen
= oldsfep
->namelen
;
1240 sfep
->offset
= oldsfep
->offset
;
1241 memcpy(sfep
->name
, oldsfep
->name
, sfep
->namelen
);
1242 xfs_dir3_sfe_put_ino(dp
->i_mount
, sfp
, sfep
,
1243 xfs_dir3_sfe_get_ino(dp
->i_mount
, oldsfp
, oldsfep
));
1246 * Clean up the inode.
1249 dp
->i_d
.di_size
= newsize
;
1250 xfs_trans_log_inode(args
->trans
, dp
, XFS_ILOG_CORE
| XFS_ILOG_DDATA
);
1252 #endif /* XFS_BIG_INUMS */