Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : /*
3 : * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
4 : * All Rights Reserved.
5 : */
6 : #include "xfs.h"
7 : #include "xfs_fs.h"
8 : #include "xfs_shared.h"
9 : #include "xfs_format.h"
10 : #include "xfs_log_format.h"
11 : #include "xfs_trans_resv.h"
12 : #include "xfs_mount.h"
13 : #include "xfs_inode.h"
14 : #include "xfs_trans.h"
15 : #include "xfs_dir2.h"
16 : #include "xfs_dir2_priv.h"
17 : #include "xfs_trace.h"
18 :
19 : /*
20 : * Prototypes for internal functions.
21 : */
22 : static void xfs_dir2_sf_addname_easy(xfs_da_args_t *args,
23 : xfs_dir2_sf_entry_t *sfep,
24 : xfs_dir2_data_aoff_t offset,
25 : int new_isize);
26 : static void xfs_dir2_sf_addname_hard(xfs_da_args_t *args, int objchange,
27 : int new_isize);
28 : static int xfs_dir2_sf_addname_pick(xfs_da_args_t *args, int objchange,
29 : xfs_dir2_sf_entry_t **sfepp,
30 : xfs_dir2_data_aoff_t *offsetp);
31 : #ifdef DEBUG
32 : static void xfs_dir2_sf_check(xfs_da_args_t *args);
33 : #else
34 : #define xfs_dir2_sf_check(args)
35 : #endif /* DEBUG */
36 :
37 : static void xfs_dir2_sf_toino4(xfs_da_args_t *args);
38 : static void xfs_dir2_sf_toino8(xfs_da_args_t *args);
39 :
40 : int
41 0 : xfs_dir2_sf_entsize(
42 : struct xfs_mount *mp,
43 : struct xfs_dir2_sf_hdr *hdr,
44 : int len)
45 : {
46 8027179927 : int count = len;
47 :
48 8027179927 : count += sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
49 0 : count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
50 :
51 8027179927 : if (xfs_has_ftype(mp))
52 8027616520 : count += sizeof(uint8_t);
53 8027179927 : return count;
54 : }
55 :
56 : struct xfs_dir2_sf_entry *
57 3588446449 : xfs_dir2_sf_nextentry(
58 : struct xfs_mount *mp,
59 : struct xfs_dir2_sf_hdr *hdr,
60 : struct xfs_dir2_sf_entry *sfep)
61 : {
62 7155522958 : return (void *)sfep + xfs_dir2_sf_entsize(mp, hdr, sfep->namelen);
63 : }
64 :
65 : /*
66 : * In short-form directory entries the inode numbers are stored at variable
67 : * offset behind the entry name. If the entry stores a filetype value, then it
68 : * sits between the name and the inode number. The actual inode numbers can
69 : * come in two formats as well, either 4 bytes or 8 bytes wide.
70 : */
71 : xfs_ino_t
72 6850583536 : xfs_dir2_sf_get_ino(
73 : struct xfs_mount *mp,
74 : struct xfs_dir2_sf_hdr *hdr,
75 : struct xfs_dir2_sf_entry *sfep)
76 : {
77 6850583536 : uint8_t *from = sfep->name + sfep->namelen;
78 :
79 6850583536 : if (xfs_has_ftype(mp))
80 6851463287 : from++;
81 :
82 6850583536 : if (!hdr->i8count)
83 6850583536 : return get_unaligned_be32(from);
84 0 : return get_unaligned_be64(from) & XFS_MAXINUMBER;
85 : }
86 :
87 : void
88 72406245 : xfs_dir2_sf_put_ino(
89 : struct xfs_mount *mp,
90 : struct xfs_dir2_sf_hdr *hdr,
91 : struct xfs_dir2_sf_entry *sfep,
92 : xfs_ino_t ino)
93 : {
94 72406245 : uint8_t *to = sfep->name + sfep->namelen;
95 :
96 72406245 : ASSERT(ino <= XFS_MAXINUMBER);
97 :
98 72406245 : if (xfs_has_ftype(mp))
99 72406142 : to++;
100 :
101 72406245 : if (hdr->i8count)
102 0 : put_unaligned_be64(ino, to);
103 : else
104 72406245 : put_unaligned_be32(ino, to);
105 72406203 : }
106 :
107 : xfs_ino_t
108 1673562803 : xfs_dir2_sf_get_parent_ino(
109 : struct xfs_dir2_sf_hdr *hdr)
110 : {
111 1673562803 : if (!hdr->i8count)
112 1673562801 : return get_unaligned_be32(hdr->parent);
113 2 : return get_unaligned_be64(hdr->parent) & XFS_MAXINUMBER;
114 : }
115 :
116 : void
117 20166528 : xfs_dir2_sf_put_parent_ino(
118 : struct xfs_dir2_sf_hdr *hdr,
119 : xfs_ino_t ino)
120 : {
121 20166528 : ASSERT(ino <= XFS_MAXINUMBER);
122 :
123 20166528 : if (hdr->i8count)
124 0 : put_unaligned_be64(ino, hdr->parent);
125 : else
126 20166528 : put_unaligned_be32(ino, hdr->parent);
127 20166576 : }
128 :
129 : /*
130 : * The file type field is stored at the end of the name for filetype enabled
131 : * shortform directories, or not at all otherwise.
132 : */
133 : uint8_t
134 3587412833 : xfs_dir2_sf_get_ftype(
135 : struct xfs_mount *mp,
136 : struct xfs_dir2_sf_entry *sfep)
137 : {
138 3587412833 : if (xfs_has_ftype(mp)) {
139 3789764991 : uint8_t ftype = sfep->name[sfep->namelen];
140 :
141 3789764991 : if (ftype < XFS_DIR3_FT_MAX)
142 3792317001 : return ftype;
143 : }
144 :
145 : return XFS_DIR3_FT_UNKNOWN;
146 : }
147 :
148 : void
149 72407032 : xfs_dir2_sf_put_ftype(
150 : struct xfs_mount *mp,
151 : struct xfs_dir2_sf_entry *sfep,
152 : uint8_t ftype)
153 : {
154 72407032 : ASSERT(ftype < XFS_DIR3_FT_MAX);
155 :
156 72407032 : if (xfs_has_ftype(mp))
157 72407422 : sfep->name[sfep->namelen] = ftype;
158 72407032 : }
159 :
160 : /*
161 : * Given a block directory (dp/block), calculate its size as a shortform (sf)
162 : * directory and a header for the sf directory, if it will fit it the
163 : * space currently present in the inode. If it won't fit, the output
164 : * size is too big (but not accurate).
165 : */
166 : int /* size for sf form */
167 1843775 : xfs_dir2_block_sfsize(
168 : xfs_inode_t *dp, /* incore inode pointer */
169 : xfs_dir2_data_hdr_t *hdr, /* block directory data */
170 : xfs_dir2_sf_hdr_t *sfhp) /* output: header for sf form */
171 : {
172 1843775 : xfs_dir2_dataptr_t addr; /* data entry address */
173 1843775 : xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
174 1843775 : xfs_dir2_block_tail_t *btp; /* tail area of the block */
175 1843775 : int count; /* shortform entry count */
176 1843775 : xfs_dir2_data_entry_t *dep; /* data entry in the block */
177 1843775 : int i; /* block entry index */
178 1843775 : int i8count; /* count of big-inode entries */
179 1843775 : int isdot; /* entry is "." */
180 1843775 : int isdotdot; /* entry is ".." */
181 1843775 : xfs_mount_t *mp; /* mount structure pointer */
182 1843775 : int namelen; /* total name bytes */
183 1843775 : xfs_ino_t parent = 0; /* parent inode number */
184 1843775 : int size=0; /* total computed size */
185 1843775 : int has_ftype;
186 1843775 : struct xfs_da_geometry *geo;
187 :
188 1843775 : mp = dp->i_mount;
189 1843775 : geo = mp->m_dir_geo;
190 :
191 : /*
192 : * if there is a filetype field, add the extra byte to the namelen
193 : * for each entry that we see.
194 : */
195 1843775 : has_ftype = xfs_has_ftype(mp) ? 1 : 0;
196 :
197 1843775 : count = i8count = namelen = 0;
198 1843775 : btp = xfs_dir2_block_tail_p(geo, hdr);
199 1843775 : blp = xfs_dir2_block_leaf_p(btp);
200 :
201 : /*
202 : * Iterate over the block's data entries by using the leaf pointers.
203 : */
204 89429334 : for (i = 0; i < be32_to_cpu(btp->count); i++) {
205 88883806 : if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
206 14181307 : continue;
207 : /*
208 : * Calculate the pointer to the entry at hand.
209 : */
210 30260596 : dep = (xfs_dir2_data_entry_t *)((char *)hdr +
211 30260596 : xfs_dir2_dataptr_to_off(geo, addr));
212 : /*
213 : * Detect . and .., so we can special-case them.
214 : * . is not included in sf directories.
215 : * .. is included by just the parent inode number.
216 : */
217 30260596 : isdot = dep->namelen == 1 && dep->name[0] == '.';
218 30260596 : isdotdot =
219 : dep->namelen == 2 &&
220 30260596 : dep->name[0] == '.' && dep->name[1] == '.';
221 :
222 30260596 : if (!isdot)
223 28416705 : i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
224 :
225 : /* take into account the file type field */
226 30260596 : if (!isdot && !isdotdot) {
227 26573062 : count++;
228 26573062 : namelen += dep->namelen + has_ftype;
229 3687534 : } else if (isdotdot)
230 1843761 : parent = be64_to_cpu(dep->inumber);
231 : /*
232 : * Calculate the new size, see if we should give up yet.
233 : */
234 30260596 : size = xfs_dir2_sf_hdr_size(i8count) + /* header */
235 30260596 : count * 3 * sizeof(u8) + /* namelen + offset */
236 30260596 : namelen + /* name */
237 : (i8count ? /* inumber */
238 0 : count * XFS_INO64_SIZE :
239 30260596 : count * XFS_INO32_SIZE);
240 30260596 : if (size > xfs_inode_data_fork_size(dp))
241 1571011 : return size; /* size value is a failure */
242 : }
243 : /*
244 : * Create the output header, if it worked.
245 : */
246 272764 : sfhp->count = count;
247 272764 : sfhp->i8count = i8count;
248 272764 : xfs_dir2_sf_put_parent_ino(sfhp, parent);
249 272764 : return size;
250 : }
251 :
252 : /*
253 : * Convert a block format directory to shortform.
254 : * Caller has already checked that it will fit, and built us a header.
255 : */
256 : int /* error */
257 272764 : xfs_dir2_block_to_sf(
258 : struct xfs_da_args *args, /* operation arguments */
259 : struct xfs_buf *bp,
260 : int size, /* shortform directory size */
261 : struct xfs_dir2_sf_hdr *sfhp) /* shortform directory hdr */
262 : {
263 272764 : struct xfs_inode *dp = args->dp;
264 272764 : struct xfs_mount *mp = dp->i_mount;
265 272764 : int error; /* error return value */
266 272764 : int logflags; /* inode logging flags */
267 272764 : struct xfs_dir2_sf_entry *sfep; /* shortform entry */
268 272764 : struct xfs_dir2_sf_hdr *sfp; /* shortform directory header */
269 272764 : unsigned int offset = args->geo->data_entry_offset;
270 272764 : unsigned int end;
271 :
272 272764 : trace_xfs_dir2_block_to_sf(args);
273 :
274 : /*
275 : * Allocate a temporary destination buffer the size of the inode to
276 : * format the data into. Once we have formatted the data, we can free
277 : * the block and copy the formatted data into the inode literal area.
278 : */
279 272764 : sfp = kmem_alloc(mp->m_sb.sb_inodesize, 0);
280 545528 : memcpy(sfp, sfhp, xfs_dir2_sf_hdr_size(sfhp->i8count));
281 :
282 : /*
283 : * Loop over the active and unused entries. Stop when we reach the
284 : * leaf/tail portion of the block.
285 : */
286 272764 : end = xfs_dir3_data_end_offset(args->geo, bp->b_addr);
287 272764 : sfep = xfs_dir2_sf_firstentry(sfp);
288 6163871 : while (offset < end) {
289 5891107 : struct xfs_dir2_data_unused *dup = bp->b_addr + offset;
290 5891107 : struct xfs_dir2_data_entry *dep = bp->b_addr + offset;
291 :
292 : /*
293 : * If it's unused, just skip over it.
294 : */
295 5891107 : if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
296 1590246 : offset += be16_to_cpu(dup->length);
297 1590246 : continue;
298 : }
299 :
300 : /*
301 : * Skip .
302 : */
303 4300861 : if (dep->namelen == 1 && dep->name[0] == '.')
304 272764 : ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
305 : /*
306 : * Skip .., but make sure the inode number is right.
307 : */
308 4028097 : else if (dep->namelen == 2 &&
309 272764 : dep->name[0] == '.' && dep->name[1] == '.')
310 272764 : ASSERT(be64_to_cpu(dep->inumber) ==
311 : xfs_dir2_sf_get_parent_ino(sfp));
312 : /*
313 : * Normal entry, copy it into shortform.
314 : */
315 : else {
316 3755333 : sfep->namelen = dep->namelen;
317 3755333 : xfs_dir2_sf_put_offset(sfep, offset);
318 7510666 : memcpy(sfep->name, dep->name, dep->namelen);
319 3755333 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
320 3755333 : be64_to_cpu(dep->inumber));
321 3755333 : xfs_dir2_sf_put_ftype(mp, sfep,
322 : xfs_dir2_data_get_ftype(mp, dep));
323 :
324 3755333 : sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
325 : }
326 8601722 : offset += xfs_dir2_data_entsize(mp, dep->namelen);
327 : }
328 272764 : ASSERT((char *)sfep - (char *)sfp == size);
329 :
330 : /* now we are done with the block, we can shrink the inode */
331 272764 : logflags = XFS_ILOG_CORE;
332 272764 : error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
333 272764 : if (error) {
334 0 : ASSERT(error != -ENOSPC);
335 0 : goto out;
336 : }
337 :
338 : /*
339 : * The buffer is now unconditionally gone, whether
340 : * xfs_dir2_shrink_inode worked or not.
341 : *
342 : * Convert the inode to local format and copy the data in.
343 : */
344 272764 : ASSERT(dp->i_df.if_bytes == 0);
345 272764 : xfs_init_local_fork(dp, XFS_DATA_FORK, sfp, size);
346 272763 : dp->i_df.if_format = XFS_DINODE_FMT_LOCAL;
347 272763 : dp->i_disk_size = size;
348 :
349 272763 : logflags |= XFS_ILOG_DDATA;
350 272763 : xfs_dir2_sf_check(args);
351 272763 : out:
352 272763 : xfs_trans_log_inode(args->trans, dp, logflags);
353 272763 : kmem_free(sfp);
354 272764 : return error;
355 : }
356 :
357 : /*
358 : * Add a name to a shortform directory.
359 : * There are two algorithms, "easy" and "hard" which we decide on
360 : * before changing anything.
361 : * Convert to block form if necessary, if the new entry won't fit.
362 : */
363 : int /* error */
364 50877083 : xfs_dir2_sf_addname(
365 : xfs_da_args_t *args) /* operation arguments */
366 : {
367 50877083 : xfs_inode_t *dp; /* incore directory inode */
368 50877083 : int error; /* error return value */
369 50877083 : int incr_isize; /* total change in size */
370 50877083 : int new_isize; /* size after adding name */
371 50877083 : int objchange; /* changing to 8-byte inodes */
372 50877083 : xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
373 50877083 : int pick; /* which algorithm to use */
374 50877083 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
375 50877083 : xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
376 :
377 50877083 : trace_xfs_dir2_sf_addname(args);
378 :
379 50877613 : ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT);
380 50877562 : dp = args->dp;
381 50877562 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
382 50877562 : ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
383 50877562 : ASSERT(dp->i_df.if_bytes == dp->i_disk_size);
384 50877562 : ASSERT(dp->i_df.if_u1.if_data != NULL);
385 50877562 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
386 50877562 : ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
387 : /*
388 : * Compute entry (and change in) size.
389 : */
390 50877562 : incr_isize = xfs_dir2_sf_entsize(dp->i_mount, sfp, args->namelen);
391 50877562 : objchange = 0;
392 :
393 : /*
394 : * Do we have to change to 8 byte inodes?
395 : */
396 50877562 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
397 : /*
398 : * Yes, adjust the inode size. old count + (parent + new)
399 : */
400 0 : incr_isize += (sfp->count + 2) * XFS_INO64_DIFF;
401 0 : objchange = 1;
402 : }
403 :
404 50877562 : new_isize = (int)dp->i_disk_size + incr_isize;
405 : /*
406 : * Won't fit as shortform any more (due to size),
407 : * or the pick routine says it won't (due to offset values).
408 : */
409 101360710 : if (new_isize > xfs_inode_data_fork_size(dp) ||
410 : (pick =
411 50483958 : xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
412 : /*
413 : * Just checking or no space reservation, it doesn't fit.
414 : */
415 394019 : if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
416 : return -ENOSPC;
417 : /*
418 : * Convert to block form then add the name.
419 : */
420 394019 : error = xfs_dir2_sf_to_block(args);
421 394019 : if (error)
422 : return error;
423 394019 : return xfs_dir2_block_addname(args);
424 : }
425 : /*
426 : * Just checking, it fits.
427 : */
428 50482733 : if (args->op_flags & XFS_DA_OP_JUSTCHECK)
429 : return 0;
430 : /*
431 : * Do it the easy way - just add it at the end.
432 : */
433 50482733 : if (pick == 1)
434 50479834 : xfs_dir2_sf_addname_easy(args, sfep, offset, new_isize);
435 : /*
436 : * Do it the hard way - look for a place to insert the new entry.
437 : * Convert to 8 byte inode numbers first if necessary.
438 : */
439 : else {
440 2899 : ASSERT(pick == 2);
441 2899 : if (objchange)
442 0 : xfs_dir2_sf_toino8(args);
443 2899 : xfs_dir2_sf_addname_hard(args, objchange, new_isize);
444 : }
445 50483295 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
446 50483295 : return 0;
447 : }
448 :
449 : /*
450 : * Add the new entry the "easy" way.
451 : * This is copying the old directory and adding the new entry at the end.
452 : * Since it's sorted by "offset" we need room after the last offset
453 : * that's already there, and then room to convert to a block directory.
454 : * This is already checked by the pick routine.
455 : */
456 : static void
457 50480255 : xfs_dir2_sf_addname_easy(
458 : xfs_da_args_t *args, /* operation arguments */
459 : xfs_dir2_sf_entry_t *sfep, /* pointer to new entry */
460 : xfs_dir2_data_aoff_t offset, /* offset to use for new ent */
461 : int new_isize) /* new directory size */
462 : {
463 50480255 : struct xfs_inode *dp = args->dp;
464 50480255 : struct xfs_mount *mp = dp->i_mount;
465 50480255 : int byteoff; /* byte offset in sf dir */
466 50480255 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
467 :
468 50480255 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
469 50480255 : byteoff = (int)((char *)sfep - (char *)sfp);
470 : /*
471 : * Grow the in-inode space.
472 : */
473 100960510 : xfs_idata_realloc(dp, xfs_dir2_sf_entsize(mp, sfp, args->namelen),
474 : XFS_DATA_FORK);
475 : /*
476 : * Need to set up again due to realloc of the inode data.
477 : */
478 50478877 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
479 50478877 : sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
480 : /*
481 : * Fill in the new entry.
482 : */
483 50478877 : sfep->namelen = args->namelen;
484 50478877 : xfs_dir2_sf_put_offset(sfep, offset);
485 100958624 : memcpy(sfep->name, args->name, sfep->namelen);
486 50479312 : xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
487 50479878 : xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
488 :
489 : /*
490 : * Update the header and inode.
491 : */
492 50480342 : sfp->count++;
493 50480342 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
494 0 : sfp->i8count++;
495 50480342 : dp->i_disk_size = new_isize;
496 50480342 : xfs_dir2_sf_check(args);
497 50480188 : }
498 :
499 : /*
500 : * Add the new entry the "hard" way.
501 : * The caller has already converted to 8 byte inode numbers if necessary,
502 : * in which case we need to leave the i8count at 1.
503 : * Find a hole that the new entry will fit into, and copy
504 : * the first part of the entries, the new entry, and the last part of
505 : * the entries.
506 : */
507 : /* ARGSUSED */
508 : static void
509 2899 : xfs_dir2_sf_addname_hard(
510 : xfs_da_args_t *args, /* operation arguments */
511 : int objchange, /* changing inode number size */
512 : int new_isize) /* new directory size */
513 : {
514 2899 : struct xfs_inode *dp = args->dp;
515 2899 : struct xfs_mount *mp = dp->i_mount;
516 2899 : int add_datasize; /* data size need for new ent */
517 2899 : char *buf; /* buffer for old */
518 2899 : int eof; /* reached end of old dir */
519 2899 : int nbytes; /* temp for byte copies */
520 2899 : xfs_dir2_data_aoff_t new_offset; /* next offset value */
521 2899 : xfs_dir2_data_aoff_t offset; /* current offset value */
522 2899 : int old_isize; /* previous size */
523 2899 : xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
524 2899 : xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */
525 2899 : xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
526 2899 : xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
527 :
528 : /*
529 : * Copy the old directory to the stack buffer.
530 : */
531 2899 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
532 2899 : old_isize = (int)dp->i_disk_size;
533 2899 : buf = kmem_alloc(old_isize, 0);
534 2899 : oldsfp = (xfs_dir2_sf_hdr_t *)buf;
535 5798 : memcpy(oldsfp, sfp, old_isize);
536 : /*
537 : * Loop over the old directory finding the place we're going
538 : * to insert the new entry.
539 : * If it's going to end up at the end then oldsfep will point there.
540 : */
541 2899 : for (offset = args->geo->data_first_offset,
542 : oldsfep = xfs_dir2_sf_firstentry(oldsfp),
543 2899 : add_datasize = xfs_dir2_data_entsize(mp, args->namelen),
544 2899 : eof = (char *)oldsfep == &buf[old_isize];
545 12005 : !eof;
546 9106 : offset = new_offset + xfs_dir2_data_entsize(mp, oldsfep->namelen),
547 9106 : oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep),
548 9106 : eof = (char *)oldsfep == &buf[old_isize]) {
549 12005 : new_offset = xfs_dir2_sf_get_offset(oldsfep);
550 12005 : if (offset + add_datasize <= new_offset)
551 : break;
552 : }
553 : /*
554 : * Get rid of the old directory, then allocate space for
555 : * the new one. We do this so xfs_idata_realloc won't copy
556 : * the data.
557 : */
558 2899 : xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
559 2899 : xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
560 : /*
561 : * Reset the pointer since the buffer was reallocated.
562 : */
563 2899 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
564 : /*
565 : * Copy the first part of the directory, including the header.
566 : */
567 2899 : nbytes = (int)((char *)oldsfep - (char *)oldsfp);
568 5798 : memcpy(sfp, oldsfp, nbytes);
569 2899 : sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
570 : /*
571 : * Fill in the new entry, and update the header counts.
572 : */
573 2899 : sfep->namelen = args->namelen;
574 2899 : xfs_dir2_sf_put_offset(sfep, offset);
575 5798 : memcpy(sfep->name, args->name, sfep->namelen);
576 2899 : xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
577 2899 : xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
578 2899 : sfp->count++;
579 2899 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && !objchange)
580 0 : sfp->i8count++;
581 : /*
582 : * If there's more left to copy, do that.
583 : */
584 2899 : if (!eof) {
585 2899 : sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
586 5798 : memcpy(sfep, oldsfep, old_isize - nbytes);
587 : }
588 2899 : kmem_free(buf);
589 2899 : dp->i_disk_size = new_isize;
590 2899 : xfs_dir2_sf_check(args);
591 2899 : }
592 :
593 : /*
594 : * Decide if the new entry will fit at all.
595 : * If it will fit, pick between adding the new entry to the end (easy)
596 : * or somewhere else (hard).
597 : * Return 0 (won't fit), 1 (easy), 2 (hard).
598 : */
599 : /*ARGSUSED*/
600 : static int /* pick result */
601 50484255 : xfs_dir2_sf_addname_pick(
602 : xfs_da_args_t *args, /* operation arguments */
603 : int objchange, /* inode # size changes */
604 : xfs_dir2_sf_entry_t **sfepp, /* out(1): new entry ptr */
605 : xfs_dir2_data_aoff_t *offsetp) /* out(1): new offset */
606 : {
607 50484255 : struct xfs_inode *dp = args->dp;
608 50484255 : struct xfs_mount *mp = dp->i_mount;
609 50484255 : int holefit; /* found hole it will fit in */
610 50484255 : int i; /* entry number */
611 50484255 : xfs_dir2_data_aoff_t offset; /* data block offset */
612 50484255 : xfs_dir2_sf_entry_t *sfep; /* shortform entry */
613 50484255 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
614 50484255 : int size; /* entry's data size */
615 50484255 : int used; /* data bytes used */
616 :
617 50484255 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
618 50484255 : size = xfs_dir2_data_entsize(mp, args->namelen);
619 50484255 : offset = args->geo->data_first_offset;
620 50484255 : sfep = xfs_dir2_sf_firstentry(sfp);
621 50484255 : holefit = 0;
622 : /*
623 : * Loop over sf entries.
624 : * Keep track of data offset and whether we've seen a place
625 : * to insert the new entry.
626 : */
627 228036096 : for (i = 0; i < sfp->count; i++) {
628 177551841 : if (!holefit)
629 93487532 : holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
630 177551841 : offset = xfs_dir2_sf_get_offset(sfep) +
631 177551841 : xfs_dir2_data_entsize(mp, sfep->namelen);
632 177551841 : sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
633 : }
634 : /*
635 : * Calculate data bytes used excluding the new entry, if this
636 : * was a data block (block form directory).
637 : */
638 50484255 : used = offset +
639 50484255 : (sfp->count + 3) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
640 : (uint)sizeof(xfs_dir2_block_tail_t);
641 : /*
642 : * If it won't fit in a block form then we can't insert it,
643 : * we'll go back, convert to block, then try the insert and convert
644 : * to leaf.
645 : */
646 78724748 : if (used + (holefit ? 0 : size) > args->geo->blksize)
647 : return 0;
648 : /*
649 : * If changing the inode number size, do it the hard way.
650 : */
651 50483039 : if (objchange)
652 : return 2;
653 : /*
654 : * If it won't fit at the end then do it the hard way (use the hole).
655 : */
656 50483039 : if (used + size > args->geo->blksize)
657 : return 2;
658 : /*
659 : * Do it the easy way.
660 : */
661 50480140 : *sfepp = sfep;
662 50480140 : *offsetp = offset;
663 50480140 : return 1;
664 : }
665 :
666 : #ifdef DEBUG
667 : /*
668 : * Check consistency of shortform directory, assert if bad.
669 : */
670 : static void
671 458444862 : xfs_dir2_sf_check(
672 : xfs_da_args_t *args) /* operation arguments */
673 : {
674 458444862 : struct xfs_inode *dp = args->dp;
675 458444862 : struct xfs_mount *mp = dp->i_mount;
676 458444862 : int i; /* entry number */
677 458444862 : int i8count; /* number of big inode#s */
678 458444862 : xfs_ino_t ino; /* entry inode number */
679 458444862 : int offset; /* data offset */
680 458444862 : xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
681 458444862 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
682 :
683 458444862 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
684 458444862 : offset = args->geo->data_first_offset;
685 458444862 : ino = xfs_dir2_sf_get_parent_ino(sfp);
686 458444862 : i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
687 :
688 458444862 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
689 2912313736 : i < sfp->count;
690 2453868874 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
691 2453857227 : ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
692 2453868874 : ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
693 2453868874 : i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
694 2453868874 : offset =
695 2453868874 : xfs_dir2_sf_get_offset(sfep) +
696 2453868874 : xfs_dir2_data_entsize(mp, sfep->namelen);
697 2453868874 : ASSERT(xfs_dir2_sf_get_ftype(mp, sfep) < XFS_DIR3_FT_MAX);
698 : }
699 458456509 : ASSERT(i8count == sfp->i8count);
700 458456509 : ASSERT((char *)sfep - (char *)sfp == dp->i_disk_size);
701 458456509 : ASSERT(offset +
702 : (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
703 : (uint)sizeof(xfs_dir2_block_tail_t) <= args->geo->blksize);
704 458456509 : }
705 : #endif /* DEBUG */
706 :
707 : /* Verify the consistency of an inline directory. */
708 : xfs_failaddr_t
709 128791982 : xfs_dir2_sf_verify_struct(
710 : struct xfs_mount *mp,
711 : struct xfs_dir2_sf_hdr *sfp,
712 : int64_t size)
713 : {
714 128791982 : struct xfs_dir2_sf_entry *sfep;
715 128791982 : struct xfs_dir2_sf_entry *next_sfep;
716 128791982 : char *endp;
717 128791982 : xfs_ino_t ino;
718 128791982 : int i;
719 128791982 : int i8count;
720 128791982 : int offset;
721 128791982 : int error;
722 128791982 : uint8_t filetype;
723 :
724 : /*
725 : * Give up if the directory is way too short.
726 : */
727 128791982 : if (size <= offsetof(struct xfs_dir2_sf_hdr, parent) ||
728 128791984 : size < xfs_dir2_sf_hdr_size(sfp->i8count))
729 0 : return __this_address;
730 :
731 128793163 : endp = (char *)sfp + size;
732 :
733 : /* Check .. entry */
734 128793163 : ino = xfs_dir2_sf_get_parent_ino(sfp);
735 128793163 : i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
736 128793163 : error = xfs_dir_ino_validate(mp, ino);
737 128794250 : if (error)
738 2 : return __this_address;
739 128794248 : offset = mp->m_dir_geo->data_first_offset;
740 :
741 : /* Check all reported entries */
742 128794248 : sfep = xfs_dir2_sf_firstentry(sfp);
743 696608141 : for (i = 0; i < sfp->count; i++) {
744 : /*
745 : * struct xfs_dir2_sf_entry has a variable length.
746 : * Check the fixed-offset parts of the structure are
747 : * within the data buffer.
748 : */
749 567813319 : if (((char *)sfep + sizeof(*sfep)) >= endp)
750 0 : return __this_address;
751 :
752 : /* Don't allow names with known bad length. */
753 567813319 : if (sfep->namelen == 0)
754 0 : return __this_address;
755 :
756 : /*
757 : * Check that the variable-length part of the structure is
758 : * within the data buffer. The next entry starts after the
759 : * name component, so nextentry is an acceptable test.
760 : */
761 567813319 : next_sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
762 567813319 : if (endp < (char *)next_sfep)
763 0 : return __this_address;
764 :
765 : /* Check that the offsets always increase. */
766 567813319 : if (xfs_dir2_sf_get_offset(sfep) < offset)
767 0 : return __this_address;
768 :
769 : /* Check the inode number. */
770 567813319 : ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
771 567813319 : i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
772 567813319 : error = xfs_dir_ino_validate(mp, ino);
773 567813893 : if (error)
774 0 : return __this_address;
775 :
776 : /* Check the file type. */
777 567813893 : filetype = xfs_dir2_sf_get_ftype(mp, sfep);
778 : if (filetype >= XFS_DIR3_FT_MAX)
779 567813893 : return __this_address;
780 :
781 567813893 : offset = xfs_dir2_sf_get_offset(sfep) +
782 567813893 : xfs_dir2_data_entsize(mp, sfep->namelen);
783 :
784 567813893 : sfep = next_sfep;
785 : }
786 128794822 : if (i8count != sfp->i8count)
787 0 : return __this_address;
788 128794822 : if ((void *)sfep != (void *)endp)
789 0 : return __this_address;
790 :
791 : /* Make sure this whole thing ought to be in local format. */
792 128794822 : if (offset + (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
793 128794822 : (uint)sizeof(xfs_dir2_block_tail_t) > mp->m_dir_geo->blksize)
794 0 : return __this_address;
795 :
796 : return NULL;
797 : }
798 :
799 : xfs_failaddr_t
800 128792994 : xfs_dir2_sf_verify(
801 : struct xfs_inode *ip)
802 : {
803 128792994 : struct xfs_mount *mp = ip->i_mount;
804 128792994 : struct xfs_ifork *ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
805 128792994 : struct xfs_dir2_sf_hdr *sfp;
806 :
807 128792994 : ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL);
808 :
809 128792994 : sfp = (struct xfs_dir2_sf_hdr *)ifp->if_u1.if_data;
810 128792994 : return xfs_dir2_sf_verify_struct(mp, sfp, ifp->if_bytes);
811 : }
812 :
813 : /*
814 : * Create a new (shortform) directory.
815 : */
816 : int /* error, always 0 */
817 6880384 : xfs_dir2_sf_create(
818 : xfs_da_args_t *args, /* operation arguments */
819 : xfs_ino_t pino) /* parent inode number */
820 : {
821 6880384 : xfs_inode_t *dp; /* incore directory inode */
822 6880384 : int i8count; /* parent inode is an 8-byte number */
823 6880384 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
824 6880384 : int size; /* directory size */
825 :
826 6880384 : trace_xfs_dir2_sf_create(args);
827 :
828 6880437 : dp = args->dp;
829 :
830 6880437 : ASSERT(dp != NULL);
831 6880437 : ASSERT(dp->i_disk_size == 0);
832 : /*
833 : * If it's currently a zero-length extent file,
834 : * convert it to local format.
835 : */
836 6880437 : if (dp->i_df.if_format == XFS_DINODE_FMT_EXTENTS) {
837 6857331 : dp->i_df.if_format = XFS_DINODE_FMT_LOCAL;
838 6857331 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
839 : }
840 6880448 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
841 6880448 : ASSERT(dp->i_df.if_bytes == 0);
842 6880448 : i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
843 6880448 : size = xfs_dir2_sf_hdr_size(i8count);
844 : /*
845 : * Make a buffer for the data.
846 : */
847 6880448 : xfs_idata_realloc(dp, size, XFS_DATA_FORK);
848 : /*
849 : * Fill in the header,
850 : */
851 6880396 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
852 6880396 : sfp->i8count = i8count;
853 : /*
854 : * Now can put in the inode number, since i8count is set.
855 : */
856 6880396 : xfs_dir2_sf_put_parent_ino(sfp, pino);
857 6880330 : sfp->count = 0;
858 6880330 : dp->i_disk_size = size;
859 6880330 : xfs_dir2_sf_check(args);
860 6880316 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
861 6880369 : return 0;
862 : }
863 :
864 : /*
865 : * Lookup an entry in a shortform directory.
866 : * Returns EEXIST if found, ENOENT if not found.
867 : */
868 : int /* error */
869 344754319 : xfs_dir2_sf_lookup(
870 : xfs_da_args_t *args) /* operation arguments */
871 : {
872 344754319 : struct xfs_inode *dp = args->dp;
873 344754319 : struct xfs_mount *mp = dp->i_mount;
874 344754319 : int i; /* entry index */
875 344754319 : xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
876 344754319 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
877 344754319 : enum xfs_dacmp cmp; /* comparison result */
878 344754319 : xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
879 :
880 344754319 : trace_xfs_dir2_sf_lookup(args);
881 :
882 344758534 : xfs_dir2_sf_check(args);
883 :
884 344781797 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
885 344781797 : ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
886 344781797 : ASSERT(dp->i_df.if_bytes == dp->i_disk_size);
887 344781797 : ASSERT(dp->i_df.if_u1.if_data != NULL);
888 344781797 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
889 344781797 : ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
890 : /*
891 : * Special case for .
892 : */
893 344781797 : if (args->namelen == 1 && args->name[0] == '.') {
894 11005287 : args->inumber = dp->i_ino;
895 11005287 : args->cmpresult = XFS_CMP_EXACT;
896 11005287 : args->filetype = XFS_DIR3_FT_DIR;
897 11005287 : return -EEXIST;
898 : }
899 : /*
900 : * Special case for ..
901 : */
902 333776510 : if (args->namelen == 2 &&
903 27131373 : args->name[0] == '.' && args->name[1] == '.') {
904 23670532 : args->inumber = xfs_dir2_sf_get_parent_ino(sfp);
905 23670532 : args->cmpresult = XFS_CMP_EXACT;
906 23670532 : args->filetype = XFS_DIR3_FT_DIR;
907 23670532 : return -EEXIST;
908 : }
909 : /*
910 : * Loop over all the entries trying to match ours.
911 : */
912 310105978 : ci_sfep = NULL;
913 1638764401 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
914 1018552445 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
915 : /*
916 : * Compare name and if it's an exact match, return the inode
917 : * number. If it's the first case-insensitive match, store the
918 : * inode number and continue looking for an exact match.
919 : */
920 1220763129 : cmp = xfs_dir2_compname(args, sfep->name, sfep->namelen);
921 1220775937 : if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
922 202223785 : args->cmpresult = cmp;
923 202223785 : args->inumber = xfs_dir2_sf_get_ino(mp, sfp, sfep);
924 202223785 : args->filetype = xfs_dir2_sf_get_ftype(mp, sfep);
925 202223785 : if (cmp == XFS_CMP_EXACT)
926 : return -EEXIST;
927 : ci_sfep = sfep;
928 : }
929 : }
930 107895294 : ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
931 : /*
932 : * Here, we can only be doing a lookup (not a rename or replace).
933 : * If a case-insensitive match was not found, return -ENOENT.
934 : */
935 107895294 : if (!ci_sfep)
936 : return -ENOENT;
937 : /* otherwise process the CI match as required by the caller */
938 530 : return xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
939 : }
940 :
941 : /*
942 : * Remove an entry from a shortform directory.
943 : */
944 : int /* error */
945 24921948 : xfs_dir2_sf_removename(
946 : xfs_da_args_t *args)
947 : {
948 24921948 : struct xfs_inode *dp = args->dp;
949 24921948 : struct xfs_mount *mp = dp->i_mount;
950 24921948 : int byteoff; /* offset of removed entry */
951 24921948 : int entsize; /* this entry's size */
952 24921948 : int i; /* shortform entry index */
953 24921948 : int newsize; /* new inode size */
954 24921948 : int oldsize; /* old inode size */
955 24921948 : xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
956 24921948 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
957 :
958 24921948 : trace_xfs_dir2_sf_removename(args);
959 :
960 24921733 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
961 24921733 : oldsize = (int)dp->i_disk_size;
962 24921733 : ASSERT(oldsize >= offsetof(struct xfs_dir2_sf_hdr, parent));
963 24921733 : ASSERT(dp->i_df.if_bytes == oldsize);
964 24921733 : ASSERT(dp->i_df.if_u1.if_data != NULL);
965 24921733 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
966 24921733 : ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count));
967 : /*
968 : * Loop over the old directory entries.
969 : * Find the one we're deleting.
970 : */
971 99719133 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
972 49875667 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
973 74797342 : if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
974 : XFS_CMP_EXACT) {
975 24921929 : ASSERT(xfs_dir2_sf_get_ino(mp, sfp, sfep) ==
976 : args->inumber);
977 : break;
978 : }
979 : }
980 : /*
981 : * Didn't find it.
982 : */
983 24921987 : if (i == sfp->count)
984 : return -ENOENT;
985 : /*
986 : * Calculate sizes.
987 : */
988 24921987 : byteoff = (int)((char *)sfep - (char *)sfp);
989 24921987 : entsize = xfs_dir2_sf_entsize(mp, sfp, args->namelen);
990 24921987 : newsize = oldsize - entsize;
991 : /*
992 : * Copy the part if any after the removed entry, sliding it down.
993 : */
994 24921987 : if (byteoff + entsize < oldsize)
995 32199294 : memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
996 : oldsize - (byteoff + entsize));
997 : /*
998 : * Fix up the header and file size.
999 : */
1000 24921987 : sfp->count--;
1001 24921987 : dp->i_disk_size = newsize;
1002 : /*
1003 : * Reallocate, making it smaller.
1004 : */
1005 24921987 : xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
1006 24921783 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1007 : /*
1008 : * Are we changing inode number size?
1009 : */
1010 24921783 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1011 0 : if (sfp->i8count == 1)
1012 0 : xfs_dir2_sf_toino4(args);
1013 : else
1014 0 : sfp->i8count--;
1015 : }
1016 24921783 : xfs_dir2_sf_check(args);
1017 24921991 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1018 24921991 : return 0;
1019 : }
1020 :
1021 : /*
1022 : * Check whether the sf dir replace operation need more blocks.
1023 : */
1024 : static bool
1025 0 : xfs_dir2_sf_replace_needblock(
1026 : struct xfs_inode *dp,
1027 : xfs_ino_t inum)
1028 : {
1029 0 : int newsize;
1030 0 : struct xfs_dir2_sf_hdr *sfp;
1031 :
1032 0 : if (dp->i_df.if_format != XFS_DINODE_FMT_LOCAL)
1033 : return false;
1034 :
1035 0 : sfp = (struct xfs_dir2_sf_hdr *)dp->i_df.if_u1.if_data;
1036 0 : newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF;
1037 :
1038 0 : return inum > XFS_DIR2_MAX_SHORT_INUM &&
1039 0 : sfp->i8count == 0 && newsize > xfs_inode_data_fork_size(dp);
1040 : }
1041 :
1042 : /*
1043 : * Replace the inode number of an entry in a shortform directory.
1044 : */
1045 : int /* error */
1046 31182736 : xfs_dir2_sf_replace(
1047 : xfs_da_args_t *args) /* operation arguments */
1048 : {
1049 31182736 : struct xfs_inode *dp = args->dp;
1050 31182736 : struct xfs_mount *mp = dp->i_mount;
1051 31182736 : int i; /* entry index */
1052 31182736 : xfs_ino_t ino=0; /* entry old inode number */
1053 31182736 : int i8elevated; /* sf_toino8 set i8count=1 */
1054 31182736 : xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
1055 31182736 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
1056 :
1057 31182736 : trace_xfs_dir2_sf_replace(args);
1058 :
1059 31182790 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
1060 31182790 : ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
1061 31182790 : ASSERT(dp->i_df.if_bytes == dp->i_disk_size);
1062 31182790 : ASSERT(dp->i_df.if_u1.if_data != NULL);
1063 31182790 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1064 31182790 : ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
1065 :
1066 : /*
1067 : * New inode number is large, and need to convert to 8-byte inodes.
1068 : */
1069 31182790 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
1070 0 : int error; /* error return value */
1071 :
1072 : /*
1073 : * Won't fit as shortform, convert to block then do replace.
1074 : */
1075 0 : if (xfs_dir2_sf_replace_needblock(dp, args->inumber)) {
1076 0 : error = xfs_dir2_sf_to_block(args);
1077 0 : if (error)
1078 : return error;
1079 0 : return xfs_dir2_block_replace(args);
1080 : }
1081 : /*
1082 : * Still fits, convert to 8-byte now.
1083 : */
1084 0 : xfs_dir2_sf_toino8(args);
1085 0 : i8elevated = 1;
1086 0 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1087 : } else
1088 : i8elevated = 0;
1089 :
1090 31182790 : ASSERT(args->namelen != 1 || args->name[0] != '.');
1091 : /*
1092 : * Replace ..'s entry.
1093 : */
1094 31182790 : if (args->namelen == 2 &&
1095 13040516 : args->name[0] == '.' && args->name[1] == '.') {
1096 13013537 : ino = xfs_dir2_sf_get_parent_ino(sfp);
1097 13013537 : ASSERT(args->inumber != ino);
1098 13013537 : xfs_dir2_sf_put_parent_ino(sfp, args->inumber);
1099 : }
1100 : /*
1101 : * Normal entry, look for the name.
1102 : */
1103 : else {
1104 77362696 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
1105 41024190 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
1106 59193443 : if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
1107 : XFS_CMP_EXACT) {
1108 18169252 : ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
1109 18169252 : ASSERT(args->inumber != ino);
1110 18169252 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
1111 : args->inumber);
1112 18169250 : xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
1113 18169250 : break;
1114 : }
1115 : }
1116 : /*
1117 : * Didn't find it.
1118 : */
1119 18169249 : if (i == sfp->count) {
1120 0 : ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
1121 0 : if (i8elevated)
1122 0 : xfs_dir2_sf_toino4(args);
1123 0 : return -ENOENT;
1124 : }
1125 : }
1126 : /*
1127 : * See if the old number was large, the new number is small.
1128 : */
1129 31182792 : if (ino > XFS_DIR2_MAX_SHORT_INUM &&
1130 0 : args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
1131 : /*
1132 : * And the old count was one, so need to convert to small.
1133 : */
1134 0 : if (sfp->i8count == 1)
1135 0 : xfs_dir2_sf_toino4(args);
1136 : else
1137 0 : sfp->i8count--;
1138 : }
1139 : /*
1140 : * See if the old number was small, the new number is large.
1141 : */
1142 31182792 : if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
1143 31182780 : args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1144 : /*
1145 : * add to the i8count unless we just converted to 8-byte
1146 : * inodes (which does an implied i8count = 1)
1147 : */
1148 0 : ASSERT(sfp->i8count != 0);
1149 0 : if (!i8elevated)
1150 0 : sfp->i8count++;
1151 : }
1152 31182792 : xfs_dir2_sf_check(args);
1153 31182780 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1154 31182780 : return 0;
1155 : }
1156 :
1157 : /*
1158 : * Convert from 8-byte inode numbers to 4-byte inode numbers.
1159 : * The last 8-byte inode number is gone, but the count is still 1.
1160 : */
1161 : static void
1162 0 : xfs_dir2_sf_toino4(
1163 : xfs_da_args_t *args) /* operation arguments */
1164 : {
1165 0 : struct xfs_inode *dp = args->dp;
1166 0 : struct xfs_mount *mp = dp->i_mount;
1167 0 : char *buf; /* old dir's buffer */
1168 0 : int i; /* entry index */
1169 0 : int newsize; /* new inode size */
1170 0 : xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1171 0 : xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1172 0 : int oldsize; /* old inode size */
1173 0 : xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1174 0 : xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1175 :
1176 0 : trace_xfs_dir2_sf_toino4(args);
1177 :
1178 : /*
1179 : * Copy the old directory to the buffer.
1180 : * Then nuke it from the inode, and add the new buffer to the inode.
1181 : * Don't want xfs_idata_realloc copying the data here.
1182 : */
1183 0 : oldsize = dp->i_df.if_bytes;
1184 0 : buf = kmem_alloc(oldsize, 0);
1185 0 : oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1186 0 : ASSERT(oldsfp->i8count == 1);
1187 0 : memcpy(buf, oldsfp, oldsize);
1188 : /*
1189 : * Compute the new inode size.
1190 : */
1191 0 : newsize = oldsize - (oldsfp->count + 1) * XFS_INO64_DIFF;
1192 0 : xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1193 0 : xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1194 : /*
1195 : * Reset our pointers, the data has moved.
1196 : */
1197 0 : oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1198 0 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1199 : /*
1200 : * Fill in the new header.
1201 : */
1202 0 : sfp->count = oldsfp->count;
1203 0 : sfp->i8count = 0;
1204 0 : xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
1205 : /*
1206 : * Copy the entries field by field.
1207 : */
1208 0 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1209 : oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1210 0 : i < sfp->count;
1211 0 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep),
1212 : oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
1213 0 : sfep->namelen = oldsfep->namelen;
1214 0 : memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
1215 0 : memcpy(sfep->name, oldsfep->name, sfep->namelen);
1216 0 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
1217 : xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
1218 0 : xfs_dir2_sf_put_ftype(mp, sfep,
1219 : xfs_dir2_sf_get_ftype(mp, oldsfep));
1220 : }
1221 : /*
1222 : * Clean up the inode.
1223 : */
1224 0 : kmem_free(buf);
1225 0 : dp->i_disk_size = newsize;
1226 0 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1227 0 : }
1228 :
1229 : /*
1230 : * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers.
1231 : * The new entry w/ an 8-byte inode number is not there yet; we leave with
1232 : * i8count set to 1, but no corresponding 8-byte entry.
1233 : */
1234 : static void
1235 0 : xfs_dir2_sf_toino8(
1236 : xfs_da_args_t *args) /* operation arguments */
1237 : {
1238 0 : struct xfs_inode *dp = args->dp;
1239 0 : struct xfs_mount *mp = dp->i_mount;
1240 0 : char *buf; /* old dir's buffer */
1241 0 : int i; /* entry index */
1242 0 : int newsize; /* new inode size */
1243 0 : xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1244 0 : xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1245 0 : int oldsize; /* old inode size */
1246 0 : xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1247 0 : xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1248 :
1249 0 : trace_xfs_dir2_sf_toino8(args);
1250 :
1251 : /*
1252 : * Copy the old directory to the buffer.
1253 : * Then nuke it from the inode, and add the new buffer to the inode.
1254 : * Don't want xfs_idata_realloc copying the data here.
1255 : */
1256 0 : oldsize = dp->i_df.if_bytes;
1257 0 : buf = kmem_alloc(oldsize, 0);
1258 0 : oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1259 0 : ASSERT(oldsfp->i8count == 0);
1260 0 : memcpy(buf, oldsfp, oldsize);
1261 : /*
1262 : * Compute the new inode size (nb: entry count + 1 for parent)
1263 : */
1264 0 : newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF;
1265 0 : xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1266 0 : xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1267 : /*
1268 : * Reset our pointers, the data has moved.
1269 : */
1270 0 : oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1271 0 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1272 : /*
1273 : * Fill in the new header.
1274 : */
1275 0 : sfp->count = oldsfp->count;
1276 0 : sfp->i8count = 1;
1277 0 : xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
1278 : /*
1279 : * Copy the entries field by field.
1280 : */
1281 0 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1282 : oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1283 0 : i < sfp->count;
1284 0 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep),
1285 : oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
1286 0 : sfep->namelen = oldsfep->namelen;
1287 0 : memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
1288 0 : memcpy(sfep->name, oldsfep->name, sfep->namelen);
1289 0 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
1290 : xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
1291 0 : xfs_dir2_sf_put_ftype(mp, sfep,
1292 : xfs_dir2_sf_get_ftype(mp, oldsfep));
1293 : }
1294 : /*
1295 : * Clean up the inode.
1296 : */
1297 0 : kmem_free(buf);
1298 0 : dp->i_disk_size = newsize;
1299 0 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1300 0 : }
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