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 8126368780 : int count = len;
47 :
48 8126368780 : count += sizeof(struct xfs_dir2_sf_entry); /* namelen + offset */
49 0 : count += hdr->i8count ? XFS_INO64_SIZE : XFS_INO32_SIZE; /* ino # */
50 :
51 8126368780 : if (xfs_has_ftype(mp))
52 8126453200 : count += sizeof(uint8_t);
53 8126368780 : return count;
54 : }
55 :
56 : struct xfs_dir2_sf_entry *
57 1074444482 : 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 7221249235 : 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 6578958387 : 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 6578958387 : uint8_t *from = sfep->name + sfep->namelen;
78 :
79 6578958387 : if (xfs_has_ftype(mp))
80 6578384147 : from++;
81 :
82 6578958387 : if (!hdr->i8count)
83 6578958387 : return get_unaligned_be32(from);
84 0 : return get_unaligned_be64(from) & XFS_MAXINUMBER;
85 : }
86 :
87 : void
88 86816362 : 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 86816362 : uint8_t *to = sfep->name + sfep->namelen;
95 :
96 86816362 : ASSERT(ino <= XFS_MAXINUMBER);
97 :
98 86816362 : if (xfs_has_ftype(mp))
99 86817838 : to++;
100 :
101 86816362 : if (hdr->i8count)
102 0 : put_unaligned_be64(ino, to);
103 : else
104 86816362 : put_unaligned_be32(ino, to);
105 86816362 : }
106 :
107 : xfs_ino_t
108 252263413 : xfs_dir2_sf_get_parent_ino(
109 : struct xfs_dir2_sf_hdr *hdr)
110 : {
111 252263413 : if (!hdr->i8count)
112 1591156417 : return get_unaligned_be32(hdr->parent);
113 76612 : return get_unaligned_be64(hdr->parent) & XFS_MAXINUMBER;
114 : }
115 :
116 : void
117 24976028 : xfs_dir2_sf_put_parent_ino(
118 : struct xfs_dir2_sf_hdr *hdr,
119 : xfs_ino_t ino)
120 : {
121 24976028 : ASSERT(ino <= XFS_MAXINUMBER);
122 :
123 24976028 : if (hdr->i8count)
124 0 : put_unaligned_be64(ino, hdr->parent);
125 : else
126 24976028 : put_unaligned_be32(ino, hdr->parent);
127 24976028 : }
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 1078755471 : xfs_dir2_sf_get_ftype(
135 : struct xfs_mount *mp,
136 : struct xfs_dir2_sf_entry *sfep)
137 : {
138 1078755471 : if (xfs_has_ftype(mp)) {
139 1426232209 : uint8_t ftype = sfep->name[sfep->namelen];
140 :
141 1426232209 : if (ftype < XFS_DIR3_FT_MAX)
142 1426295071 : return ftype;
143 : }
144 :
145 : return XFS_DIR3_FT_UNKNOWN;
146 : }
147 :
148 : void
149 86812220 : xfs_dir2_sf_put_ftype(
150 : struct xfs_mount *mp,
151 : struct xfs_dir2_sf_entry *sfep,
152 : uint8_t ftype)
153 : {
154 86812220 : ASSERT(ftype < XFS_DIR3_FT_MAX);
155 :
156 86812220 : if (xfs_has_ftype(mp))
157 86812360 : sfep->name[sfep->namelen] = ftype;
158 86812220 : }
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 2376922 : 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 2376922 : xfs_dir2_dataptr_t addr; /* data entry address */
173 2376922 : xfs_dir2_leaf_entry_t *blp; /* leaf area of the block */
174 2376922 : xfs_dir2_block_tail_t *btp; /* tail area of the block */
175 2376922 : int count; /* shortform entry count */
176 2376922 : xfs_dir2_data_entry_t *dep; /* data entry in the block */
177 2376922 : int i; /* block entry index */
178 2376922 : int i8count; /* count of big-inode entries */
179 2376922 : int isdot; /* entry is "." */
180 2376922 : int isdotdot; /* entry is ".." */
181 2376922 : xfs_mount_t *mp; /* mount structure pointer */
182 2376922 : int namelen; /* total name bytes */
183 2376922 : xfs_ino_t parent = 0; /* parent inode number */
184 2376922 : int size=0; /* total computed size */
185 2376922 : int has_ftype;
186 2376922 : struct xfs_da_geometry *geo;
187 :
188 2376922 : mp = dp->i_mount;
189 2376922 : 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 2376922 : has_ftype = xfs_has_ftype(mp) ? 1 : 0;
196 :
197 2376922 : count = i8count = namelen = 0;
198 2376922 : btp = xfs_dir2_block_tail_p(geo, hdr);
199 2376922 : blp = xfs_dir2_block_leaf_p(btp);
200 :
201 : /*
202 : * Iterate over the block's data entries by using the leaf pointers.
203 : */
204 86815267 : for (i = 0; i < be32_to_cpu(btp->count); i++) {
205 86697011 : if ((addr = be32_to_cpu(blp[i].address)) == XFS_DIR2_NULL_DATAPTR)
206 25996504 : continue;
207 : /*
208 : * Calculate the pointer to the entry at hand.
209 : */
210 60700507 : dep = (xfs_dir2_data_entry_t *)((char *)hdr +
211 60700507 : 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 60700507 : isdot = dep->namelen == 1 && dep->name[0] == '.';
218 60700507 : isdotdot =
219 : dep->namelen == 2 &&
220 60700507 : dep->name[0] == '.' && dep->name[1] == '.';
221 :
222 60700507 : if (!isdot)
223 58322853 : i8count += be64_to_cpu(dep->inumber) > XFS_DIR2_MAX_SHORT_INUM;
224 :
225 : /* take into account the file type field */
226 60700507 : if (!isdot && !isdotdot) {
227 55946658 : count++;
228 55946658 : namelen += dep->namelen + has_ftype;
229 4753849 : } else if (isdotdot)
230 2376926 : parent = be64_to_cpu(dep->inumber);
231 : /*
232 : * Calculate the new size, see if we should give up yet.
233 : */
234 60700507 : size = xfs_dir2_sf_hdr_size(i8count) + /* header */
235 60700507 : count * 3 * sizeof(u8) + /* namelen + offset */
236 60700507 : namelen + /* name */
237 : (i8count ? /* inumber */
238 0 : count * XFS_INO64_SIZE :
239 60700507 : count * XFS_INO32_SIZE);
240 60700507 : if (size > xfs_inode_data_fork_size(dp))
241 2258666 : return size; /* size value is a failure */
242 : }
243 : /*
244 : * Create the output header, if it worked.
245 : */
246 118256 : sfhp->count = count;
247 118256 : sfhp->i8count = i8count;
248 118256 : xfs_dir2_sf_put_parent_ino(sfhp, parent);
249 118256 : 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 118256 : 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 118256 : struct xfs_inode *dp = args->dp;
264 118256 : struct xfs_mount *mp = dp->i_mount;
265 118256 : int error; /* error return value */
266 118256 : int logflags; /* inode logging flags */
267 118256 : struct xfs_dir2_sf_entry *sfep; /* shortform entry */
268 118256 : struct xfs_dir2_sf_hdr *sfp; /* shortform directory header */
269 118256 : unsigned int offset = args->geo->data_entry_offset;
270 118256 : unsigned int end;
271 :
272 118256 : 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 118256 : sfp = kmem_alloc(mp->m_sb.sb_inodesize, 0);
280 236512 : 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 118256 : end = xfs_dir3_data_end_offset(args->geo, bp->b_addr);
287 118256 : sfep = xfs_dir2_sf_firstentry(sfp);
288 3062383 : while (offset < end) {
289 2944127 : struct xfs_dir2_data_unused *dup = bp->b_addr + offset;
290 2944127 : struct xfs_dir2_data_entry *dep = bp->b_addr + offset;
291 :
292 : /*
293 : * If it's unused, just skip over it.
294 : */
295 2944127 : if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
296 764983 : offset += be16_to_cpu(dup->length);
297 764983 : continue;
298 : }
299 :
300 : /*
301 : * Skip .
302 : */
303 2179144 : if (dep->namelen == 1 && dep->name[0] == '.')
304 118256 : ASSERT(be64_to_cpu(dep->inumber) == dp->i_ino);
305 : /*
306 : * Skip .., but make sure the inode number is right.
307 : */
308 2060888 : else if (dep->namelen == 2 &&
309 118256 : dep->name[0] == '.' && dep->name[1] == '.')
310 236512 : 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 1942632 : sfep->namelen = dep->namelen;
317 1942632 : xfs_dir2_sf_put_offset(sfep, offset);
318 3885264 : memcpy(sfep->name, dep->name, dep->namelen);
319 1942632 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
320 1942632 : be64_to_cpu(dep->inumber));
321 1942633 : xfs_dir2_sf_put_ftype(mp, sfep,
322 1942632 : xfs_dir2_data_get_ftype(mp, dep));
323 :
324 1942632 : sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
325 : }
326 4358283 : offset += xfs_dir2_data_entsize(mp, dep->namelen);
327 : }
328 118256 : ASSERT((char *)sfep - (char *)sfp == size);
329 :
330 : /* now we are done with the block, we can shrink the inode */
331 118256 : logflags = XFS_ILOG_CORE;
332 118256 : error = xfs_dir2_shrink_inode(args, args->geo->datablk, bp);
333 118253 : 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 118253 : ASSERT(dp->i_df.if_bytes == 0);
345 118253 : xfs_init_local_fork(dp, XFS_DATA_FORK, sfp, size);
346 118256 : dp->i_df.if_format = XFS_DINODE_FMT_LOCAL;
347 118256 : dp->i_disk_size = size;
348 :
349 118256 : logflags |= XFS_ILOG_DDATA;
350 118256 : xfs_dir2_sf_check(args);
351 118256 : out:
352 118256 : xfs_trans_log_inode(args->trans, dp, logflags);
353 118256 : kmem_free(sfp);
354 118255 : 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 57709129 : xfs_dir2_sf_addname(
365 : xfs_da_args_t *args) /* operation arguments */
366 : {
367 57709129 : xfs_inode_t *dp; /* incore directory inode */
368 57709129 : int error; /* error return value */
369 57709129 : int incr_isize; /* total change in size */
370 57709129 : int new_isize; /* size after adding name */
371 57709129 : int objchange; /* changing to 8-byte inodes */
372 57709129 : xfs_dir2_data_aoff_t offset = 0; /* offset for new entry */
373 57709129 : int pick; /* which algorithm to use */
374 57709129 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
375 57709129 : xfs_dir2_sf_entry_t *sfep = NULL; /* shortform entry */
376 :
377 57709129 : trace_xfs_dir2_sf_addname(args);
378 :
379 57693933 : ASSERT(xfs_dir2_sf_lookup(args) == -ENOENT);
380 57706435 : dp = args->dp;
381 57706435 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
382 57706435 : ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
383 57706435 : ASSERT(dp->i_df.if_bytes == dp->i_disk_size);
384 57706435 : ASSERT(dp->i_df.if_u1.if_data != NULL);
385 57706435 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
386 57706435 : ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
387 : /*
388 : * Compute entry (and change in) size.
389 : */
390 57706435 : incr_isize = xfs_dir2_sf_entsize(dp->i_mount, sfp, args->namelen);
391 57706435 : objchange = 0;
392 :
393 : /*
394 : * Do we have to change to 8 byte inodes?
395 : */
396 57706435 : 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 57706435 : 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 115287746 : if (new_isize > xfs_inode_data_fork_size(dp) ||
410 : (pick =
411 57574108 : xfs_dir2_sf_addname_pick(args, objchange, &sfep, &offset)) == 0) {
412 : /*
413 : * Just checking or no space reservation, it doesn't fit.
414 : */
415 152216 : 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 151168 : error = xfs_dir2_sf_to_block(args);
421 151170 : if (error)
422 : return error;
423 151166 : return xfs_dir2_block_addname(args);
424 : }
425 : /*
426 : * Just checking, it fits.
427 : */
428 57561422 : 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 57254481 : if (pick == 1)
434 57210168 : 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 44313 : ASSERT(pick == 2);
441 44313 : if (objchange)
442 0 : xfs_dir2_sf_toino8(args);
443 44313 : xfs_dir2_sf_addname_hard(args, objchange, new_isize);
444 : }
445 57265237 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
446 57265237 : 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 57210360 : 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 57210360 : struct xfs_inode *dp = args->dp;
464 57210360 : struct xfs_mount *mp = dp->i_mount;
465 57210360 : int byteoff; /* byte offset in sf dir */
466 57210360 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
467 :
468 57210360 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
469 57210360 : byteoff = (int)((char *)sfep - (char *)sfp);
470 : /*
471 : * Grow the in-inode space.
472 : */
473 114420720 : 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 57214359 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
479 57214359 : sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + byteoff);
480 : /*
481 : * Fill in the new entry.
482 : */
483 57214359 : sfep->namelen = args->namelen;
484 57214359 : xfs_dir2_sf_put_offset(sfep, offset);
485 114428718 : memcpy(sfep->name, args->name, sfep->namelen);
486 57214359 : xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
487 57203196 : xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
488 :
489 : /*
490 : * Update the header and inode.
491 : */
492 57209079 : sfp->count++;
493 57209079 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM)
494 0 : sfp->i8count++;
495 57209079 : dp->i_disk_size = new_isize;
496 57209079 : xfs_dir2_sf_check(args);
497 57221407 : }
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 44313 : 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 44313 : struct xfs_inode *dp = args->dp;
515 44313 : struct xfs_mount *mp = dp->i_mount;
516 44313 : int add_datasize; /* data size need for new ent */
517 44313 : char *buf; /* buffer for old */
518 44313 : int eof; /* reached end of old dir */
519 44313 : int nbytes; /* temp for byte copies */
520 44313 : xfs_dir2_data_aoff_t new_offset; /* next offset value */
521 44313 : xfs_dir2_data_aoff_t offset; /* current offset value */
522 44313 : int old_isize; /* previous size */
523 44313 : xfs_dir2_sf_entry_t *oldsfep; /* entry in original dir */
524 44313 : xfs_dir2_sf_hdr_t *oldsfp; /* original shortform dir */
525 44313 : xfs_dir2_sf_entry_t *sfep; /* entry in new dir */
526 44313 : xfs_dir2_sf_hdr_t *sfp; /* new shortform dir */
527 :
528 : /*
529 : * Copy the old directory to the stack buffer.
530 : */
531 44313 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
532 44313 : old_isize = (int)dp->i_disk_size;
533 44313 : buf = kmem_alloc(old_isize, 0);
534 44313 : oldsfp = (xfs_dir2_sf_hdr_t *)buf;
535 88626 : 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 44313 : for (offset = args->geo->data_first_offset,
542 : oldsfep = xfs_dir2_sf_firstentry(oldsfp),
543 44313 : add_datasize = xfs_dir2_data_entsize(mp, args->namelen),
544 44313 : eof = (char *)oldsfep == &buf[old_isize];
545 181036 : !eof;
546 136723 : offset = new_offset + xfs_dir2_data_entsize(mp, oldsfep->namelen),
547 136723 : oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep),
548 136723 : eof = (char *)oldsfep == &buf[old_isize]) {
549 181036 : new_offset = xfs_dir2_sf_get_offset(oldsfep);
550 181036 : 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 44313 : xfs_idata_realloc(dp, -old_isize, XFS_DATA_FORK);
559 44313 : xfs_idata_realloc(dp, new_isize, XFS_DATA_FORK);
560 : /*
561 : * Reset the pointer since the buffer was reallocated.
562 : */
563 44313 : 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 44313 : nbytes = (int)((char *)oldsfep - (char *)oldsfp);
568 88626 : memcpy(sfp, oldsfp, nbytes);
569 44313 : sfep = (xfs_dir2_sf_entry_t *)((char *)sfp + nbytes);
570 : /*
571 : * Fill in the new entry, and update the header counts.
572 : */
573 44313 : sfep->namelen = args->namelen;
574 44313 : xfs_dir2_sf_put_offset(sfep, offset);
575 88626 : memcpy(sfep->name, args->name, sfep->namelen);
576 44313 : xfs_dir2_sf_put_ino(mp, sfp, sfep, args->inumber);
577 44313 : xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
578 44313 : sfp->count++;
579 44313 : 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 44313 : if (!eof) {
585 44313 : sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
586 88626 : memcpy(sfep, oldsfep, old_isize - nbytes);
587 : }
588 44313 : kmem_free(buf);
589 44313 : dp->i_disk_size = new_isize;
590 44313 : xfs_dir2_sf_check(args);
591 44313 : }
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 57586568 : 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 57586568 : struct xfs_inode *dp = args->dp;
608 57586568 : struct xfs_mount *mp = dp->i_mount;
609 57586568 : int holefit; /* found hole it will fit in */
610 57586568 : int i; /* entry number */
611 57586568 : xfs_dir2_data_aoff_t offset; /* data block offset */
612 57586568 : xfs_dir2_sf_entry_t *sfep; /* shortform entry */
613 57586568 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
614 57586568 : int size; /* entry's data size */
615 57586568 : int used; /* data bytes used */
616 :
617 57586568 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
618 57586568 : size = xfs_dir2_data_entsize(mp, args->namelen);
619 57586568 : offset = args->geo->data_first_offset;
620 57586568 : sfep = xfs_dir2_sf_firstentry(sfp);
621 57586568 : 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 278611788 : for (i = 0; i < sfp->count; i++) {
628 221025220 : if (!holefit)
629 112629257 : holefit = offset + size <= xfs_dir2_sf_get_offset(sfep);
630 221025220 : offset = xfs_dir2_sf_get_offset(sfep) +
631 221025220 : xfs_dir2_data_entsize(mp, sfep->namelen);
632 221025220 : 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 57586568 : used = offset +
639 57586568 : (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 85759785 : 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 57567062 : 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 57567062 : if (used + size > args->geo->blksize)
657 : return 2;
658 : /*
659 : * Do it the easy way.
660 : */
661 57522749 : *sfepp = sfep;
662 57522749 : *offsetp = offset;
663 57522749 : return 1;
664 : }
665 :
666 : #ifdef DEBUG
667 : /*
668 : * Check consistency of shortform directory, assert if bad.
669 : */
670 : static void
671 960300775 : xfs_dir2_sf_check(
672 : xfs_da_args_t *args) /* operation arguments */
673 : {
674 960300775 : struct xfs_inode *dp = args->dp;
675 960300775 : struct xfs_mount *mp = dp->i_mount;
676 960300775 : int i; /* entry number */
677 960300775 : int i8count; /* number of big inode#s */
678 960300775 : xfs_ino_t ino; /* entry inode number */
679 960300775 : int offset; /* data offset */
680 960300775 : xfs_dir2_sf_entry_t *sfep; /* shortform dir entry */
681 960300775 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
682 :
683 960300775 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
684 960300775 : offset = args->geo->data_first_offset;
685 960300775 : ino = xfs_dir2_sf_get_parent_ino(sfp);
686 960300775 : i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
687 :
688 960300775 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
689 5521148661 : i < sfp->count;
690 4560847886 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
691 4561235247 : ASSERT(xfs_dir2_sf_get_offset(sfep) >= offset);
692 4560847886 : ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
693 4560847886 : i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
694 4560847886 : offset =
695 4560847886 : xfs_dir2_sf_get_offset(sfep) +
696 4560847886 : xfs_dir2_data_entsize(mp, sfep->namelen);
697 4560847886 : ASSERT(xfs_dir2_sf_get_ftype(mp, sfep) < XFS_DIR3_FT_MAX);
698 : }
699 959913414 : ASSERT(i8count == sfp->i8count);
700 959913414 : ASSERT((char *)sfep - (char *)sfp == dp->i_disk_size);
701 959913414 : 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 959913414 : }
705 : #endif /* DEBUG */
706 :
707 : /* Verify the consistency of an inline directory. */
708 : xfs_failaddr_t
709 103235032 : xfs_dir2_sf_verify(
710 : struct xfs_inode *ip)
711 : {
712 103235032 : struct xfs_mount *mp = ip->i_mount;
713 103235032 : struct xfs_ifork *ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
714 103235032 : struct xfs_dir2_sf_hdr *sfp;
715 103235032 : struct xfs_dir2_sf_entry *sfep;
716 103235032 : struct xfs_dir2_sf_entry *next_sfep;
717 103235032 : char *endp;
718 103235032 : xfs_ino_t ino;
719 103235032 : int i;
720 103235032 : int i8count;
721 103235032 : int offset;
722 103235032 : int64_t size;
723 103235032 : int error;
724 103235032 : uint8_t filetype;
725 :
726 103235032 : ASSERT(ifp->if_format == XFS_DINODE_FMT_LOCAL);
727 :
728 103235032 : sfp = (struct xfs_dir2_sf_hdr *)ifp->if_u1.if_data;
729 103235032 : size = ifp->if_bytes;
730 :
731 : /*
732 : * Give up if the directory is way too short.
733 : */
734 103235032 : if (size <= offsetof(struct xfs_dir2_sf_hdr, parent) ||
735 103235043 : size < xfs_dir2_sf_hdr_size(sfp->i8count))
736 0 : return __this_address;
737 :
738 103235032 : endp = (char *)sfp + size;
739 :
740 : /* Check .. entry */
741 103235032 : ino = xfs_dir2_sf_get_parent_ino(sfp);
742 103235032 : i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
743 103235032 : error = xfs_dir_ino_validate(mp, ino);
744 103235026 : if (error)
745 11 : return __this_address;
746 103235015 : offset = mp->m_dir_geo->data_first_offset;
747 :
748 : /* Check all reported entries */
749 103235015 : sfep = xfs_dir2_sf_firstentry(sfp);
750 637625050 : for (i = 0; i < sfp->count; i++) {
751 : /*
752 : * struct xfs_dir2_sf_entry has a variable length.
753 : * Check the fixed-offset parts of the structure are
754 : * within the data buffer.
755 : */
756 534388484 : if (((char *)sfep + sizeof(*sfep)) >= endp)
757 0 : return __this_address;
758 :
759 : /* Don't allow names with known bad length. */
760 534388484 : if (sfep->namelen == 0)
761 0 : return __this_address;
762 :
763 : /*
764 : * Check that the variable-length part of the structure is
765 : * within the data buffer. The next entry starts after the
766 : * name component, so nextentry is an acceptable test.
767 : */
768 534388484 : next_sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep);
769 534388484 : if (endp < (char *)next_sfep)
770 0 : return __this_address;
771 :
772 : /* Check that the offsets always increase. */
773 534388484 : if (xfs_dir2_sf_get_offset(sfep) < offset)
774 0 : return __this_address;
775 :
776 : /* Check the inode number. */
777 534388484 : ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
778 534388484 : i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
779 534388484 : error = xfs_dir_ino_validate(mp, ino);
780 534390035 : if (error)
781 0 : return __this_address;
782 :
783 : /* Check the file type. */
784 534390035 : filetype = xfs_dir2_sf_get_ftype(mp, sfep);
785 : if (filetype >= XFS_DIR3_FT_MAX)
786 534390035 : return __this_address;
787 :
788 534390035 : offset = xfs_dir2_sf_get_offset(sfep) +
789 534390035 : xfs_dir2_data_entsize(mp, sfep->namelen);
790 :
791 534390035 : sfep = next_sfep;
792 : }
793 103236566 : if (i8count != sfp->i8count)
794 0 : return __this_address;
795 103236566 : if ((void *)sfep != (void *)endp)
796 0 : return __this_address;
797 :
798 : /* Make sure this whole thing ought to be in local format. */
799 103236566 : if (offset + (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
800 103236566 : (uint)sizeof(xfs_dir2_block_tail_t) > mp->m_dir_geo->blksize)
801 0 : return __this_address;
802 :
803 : return NULL;
804 : }
805 :
806 : /*
807 : * Create a new (shortform) directory.
808 : */
809 : int /* error, always 0 */
810 6559807 : xfs_dir2_sf_create(
811 : xfs_da_args_t *args, /* operation arguments */
812 : xfs_ino_t pino) /* parent inode number */
813 : {
814 6559807 : xfs_inode_t *dp; /* incore directory inode */
815 6559807 : int i8count; /* parent inode is an 8-byte number */
816 6559807 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
817 6559807 : int size; /* directory size */
818 :
819 6559807 : trace_xfs_dir2_sf_create(args);
820 :
821 6557185 : dp = args->dp;
822 :
823 6557185 : ASSERT(dp != NULL);
824 6557185 : ASSERT(dp->i_disk_size == 0);
825 : /*
826 : * If it's currently a zero-length extent file,
827 : * convert it to local format.
828 : */
829 6557185 : if (dp->i_df.if_format == XFS_DINODE_FMT_EXTENTS) {
830 6557450 : dp->i_df.if_format = XFS_DINODE_FMT_LOCAL;
831 6557450 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE);
832 : }
833 6561555 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
834 6561555 : ASSERT(dp->i_df.if_bytes == 0);
835 6561555 : i8count = pino > XFS_DIR2_MAX_SHORT_INUM;
836 6561555 : size = xfs_dir2_sf_hdr_size(i8count);
837 : /*
838 : * Make a buffer for the data.
839 : */
840 6561555 : xfs_idata_realloc(dp, size, XFS_DATA_FORK);
841 : /*
842 : * Fill in the header,
843 : */
844 6559258 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
845 6559258 : sfp->i8count = i8count;
846 : /*
847 : * Now can put in the inode number, since i8count is set.
848 : */
849 6559258 : xfs_dir2_sf_put_parent_ino(sfp, pino);
850 6558270 : sfp->count = 0;
851 6558270 : dp->i_disk_size = size;
852 6558270 : xfs_dir2_sf_check(args);
853 6558537 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
854 6561845 : return 0;
855 : }
856 :
857 : /*
858 : * Lookup an entry in a shortform directory.
859 : * Returns EEXIST if found, ENOENT if not found.
860 : */
861 : int /* error */
862 815700058 : xfs_dir2_sf_lookup(
863 : xfs_da_args_t *args) /* operation arguments */
864 : {
865 815700058 : struct xfs_inode *dp = args->dp;
866 815700058 : struct xfs_mount *mp = dp->i_mount;
867 815700058 : int i; /* entry index */
868 815700058 : xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
869 815700058 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
870 815700058 : enum xfs_dacmp cmp; /* comparison result */
871 815700058 : xfs_dir2_sf_entry_t *ci_sfep; /* case-insens. entry */
872 :
873 815700058 : trace_xfs_dir2_sf_lookup(args);
874 :
875 815768426 : xfs_dir2_sf_check(args);
876 :
877 815469163 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
878 815469163 : ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
879 815469163 : ASSERT(dp->i_df.if_bytes == dp->i_disk_size);
880 815469163 : ASSERT(dp->i_df.if_u1.if_data != NULL);
881 815469163 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
882 815469163 : ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
883 : /*
884 : * Special case for .
885 : */
886 815469163 : if (args->namelen == 1 && args->name[0] == '.') {
887 89243340 : args->inumber = dp->i_ino;
888 89243340 : args->cmpresult = XFS_CMP_EXACT;
889 89243340 : args->filetype = XFS_DIR3_FT_DIR;
890 89243340 : return -EEXIST;
891 : }
892 : /*
893 : * Special case for ..
894 : */
895 726225823 : if (args->namelen == 2 &&
896 276388318 : args->name[0] == '.' && args->name[1] == '.') {
897 257016208 : args->inumber = xfs_dir2_sf_get_parent_ino(sfp);
898 257016208 : args->cmpresult = XFS_CMP_EXACT;
899 257016208 : args->filetype = XFS_DIR3_FT_DIR;
900 257016208 : return -EEXIST;
901 : }
902 : /*
903 : * Loop over all the entries trying to match ours.
904 : */
905 469209615 : ci_sfep = NULL;
906 2399710682 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
907 1461291452 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
908 : /*
909 : * Compare name and if it's an exact match, return the inode
910 : * number. If it's the first case-insensitive match, store the
911 : * inode number and continue looking for an exact match.
912 : */
913 1808818329 : cmp = xfs_dir2_compname(args, sfep->name, sfep->namelen);
914 1808708606 : if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
915 347437279 : args->cmpresult = cmp;
916 347437279 : args->inumber = xfs_dir2_sf_get_ino(mp, sfp, sfep);
917 347437279 : args->filetype = xfs_dir2_sf_get_ftype(mp, sfep);
918 347437279 : if (cmp == XFS_CMP_EXACT)
919 : return -EEXIST;
920 : ci_sfep = sfep;
921 : }
922 : }
923 121682738 : ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
924 : /*
925 : * Here, we can only be doing a lookup (not a rename or replace).
926 : * If a case-insensitive match was not found, return -ENOENT.
927 : */
928 121682738 : if (!ci_sfep)
929 : return -ENOENT;
930 : /* otherwise process the CI match as required by the caller */
931 5206 : return xfs_dir_cilookup_result(args, ci_sfep->name, ci_sfep->namelen);
932 : }
933 :
934 : /*
935 : * Remove an entry from a shortform directory.
936 : */
937 : int /* error */
938 34607552 : xfs_dir2_sf_removename(
939 : xfs_da_args_t *args)
940 : {
941 34607552 : struct xfs_inode *dp = args->dp;
942 34607552 : struct xfs_mount *mp = dp->i_mount;
943 34607552 : int byteoff; /* offset of removed entry */
944 34607552 : int entsize; /* this entry's size */
945 34607552 : int i; /* shortform entry index */
946 34607552 : int newsize; /* new inode size */
947 34607552 : int oldsize; /* old inode size */
948 34607552 : xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
949 34607552 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
950 :
951 34607552 : trace_xfs_dir2_sf_removename(args);
952 :
953 34606719 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
954 34606719 : oldsize = (int)dp->i_disk_size;
955 34606719 : ASSERT(oldsize >= offsetof(struct xfs_dir2_sf_hdr, parent));
956 34606719 : ASSERT(dp->i_df.if_bytes == oldsize);
957 34606719 : ASSERT(dp->i_df.if_u1.if_data != NULL);
958 34606719 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
959 34606719 : ASSERT(oldsize >= xfs_dir2_sf_hdr_size(sfp->i8count));
960 : /*
961 : * Loop over the old directory entries.
962 : * Find the one we're deleting.
963 : */
964 135780912 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
965 66567474 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
966 101174077 : if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
967 : XFS_CMP_EXACT) {
968 34607894 : ASSERT(xfs_dir2_sf_get_ino(mp, sfp, sfep) ==
969 : args->inumber);
970 : break;
971 : }
972 : }
973 : /*
974 : * Didn't find it.
975 : */
976 34608010 : if (i == sfp->count)
977 : return -ENOENT;
978 : /*
979 : * Calculate sizes.
980 : */
981 34608010 : byteoff = (int)((char *)sfep - (char *)sfp);
982 34608010 : entsize = xfs_dir2_sf_entsize(mp, sfp, args->namelen);
983 34608010 : newsize = oldsize - entsize;
984 : /*
985 : * Copy the part if any after the removed entry, sliding it down.
986 : */
987 34608010 : if (byteoff + entsize < oldsize)
988 46761390 : memmove((char *)sfp + byteoff, (char *)sfp + byteoff + entsize,
989 : oldsize - (byteoff + entsize));
990 : /*
991 : * Fix up the header and file size.
992 : */
993 34608010 : sfp->count--;
994 34608010 : dp->i_disk_size = newsize;
995 : /*
996 : * Reallocate, making it smaller.
997 : */
998 34608010 : xfs_idata_realloc(dp, newsize - oldsize, XFS_DATA_FORK);
999 34608029 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1000 : /*
1001 : * Are we changing inode number size?
1002 : */
1003 34608029 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1004 0 : if (sfp->i8count == 1)
1005 0 : xfs_dir2_sf_toino4(args);
1006 : else
1007 0 : sfp->i8count--;
1008 : }
1009 34608029 : xfs_dir2_sf_check(args);
1010 34608920 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1011 34608920 : return 0;
1012 : }
1013 :
1014 : /*
1015 : * Check whether the sf dir replace operation need more blocks.
1016 : */
1017 : static bool
1018 0 : xfs_dir2_sf_replace_needblock(
1019 : struct xfs_inode *dp,
1020 : xfs_ino_t inum)
1021 : {
1022 0 : int newsize;
1023 0 : struct xfs_dir2_sf_hdr *sfp;
1024 :
1025 0 : if (dp->i_df.if_format != XFS_DINODE_FMT_LOCAL)
1026 : return false;
1027 :
1028 0 : sfp = (struct xfs_dir2_sf_hdr *)dp->i_df.if_u1.if_data;
1029 0 : newsize = dp->i_df.if_bytes + (sfp->count + 1) * XFS_INO64_DIFF;
1030 :
1031 0 : return inum > XFS_DIR2_MAX_SHORT_INUM &&
1032 0 : sfp->i8count == 0 && newsize > xfs_inode_data_fork_size(dp);
1033 : }
1034 :
1035 : /*
1036 : * Replace the inode number of an entry in a shortform directory.
1037 : */
1038 : int /* error */
1039 45921754 : xfs_dir2_sf_replace(
1040 : xfs_da_args_t *args) /* operation arguments */
1041 : {
1042 45921754 : struct xfs_inode *dp = args->dp;
1043 45921754 : struct xfs_mount *mp = dp->i_mount;
1044 45921754 : int i; /* entry index */
1045 45921754 : xfs_ino_t ino=0; /* entry old inode number */
1046 45921754 : int i8elevated; /* sf_toino8 set i8count=1 */
1047 45921754 : xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
1048 45921754 : xfs_dir2_sf_hdr_t *sfp; /* shortform structure */
1049 :
1050 45921754 : trace_xfs_dir2_sf_replace(args);
1051 :
1052 45921705 : ASSERT(dp->i_df.if_format == XFS_DINODE_FMT_LOCAL);
1053 45921705 : ASSERT(dp->i_disk_size >= offsetof(struct xfs_dir2_sf_hdr, parent));
1054 45921705 : ASSERT(dp->i_df.if_bytes == dp->i_disk_size);
1055 45921705 : ASSERT(dp->i_df.if_u1.if_data != NULL);
1056 45921705 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1057 45921705 : ASSERT(dp->i_disk_size >= xfs_dir2_sf_hdr_size(sfp->i8count));
1058 :
1059 : /*
1060 : * New inode number is large, and need to convert to 8-byte inodes.
1061 : */
1062 45921705 : if (args->inumber > XFS_DIR2_MAX_SHORT_INUM && sfp->i8count == 0) {
1063 0 : int error; /* error return value */
1064 :
1065 : /*
1066 : * Won't fit as shortform, convert to block then do replace.
1067 : */
1068 0 : if (xfs_dir2_sf_replace_needblock(dp, args->inumber)) {
1069 0 : error = xfs_dir2_sf_to_block(args);
1070 0 : if (error)
1071 : return error;
1072 0 : return xfs_dir2_block_replace(args);
1073 : }
1074 : /*
1075 : * Still fits, convert to 8-byte now.
1076 : */
1077 0 : xfs_dir2_sf_toino8(args);
1078 0 : i8elevated = 1;
1079 0 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1080 : } else
1081 : i8elevated = 0;
1082 :
1083 45921705 : ASSERT(args->namelen != 1 || args->name[0] != '.');
1084 : /*
1085 : * Replace ..'s entry.
1086 : */
1087 45921705 : if (args->namelen == 2 &&
1088 18415198 : args->name[0] == '.' && args->name[1] == '.') {
1089 18299336 : ino = xfs_dir2_sf_get_parent_ino(sfp);
1090 18299336 : ASSERT(args->inumber != ino);
1091 18299336 : xfs_dir2_sf_put_parent_ino(sfp, args->inumber);
1092 : }
1093 : /*
1094 : * Normal entry, look for the name.
1095 : */
1096 : else {
1097 111400047 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp); i < sfp->count;
1098 56155309 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep)) {
1099 83777678 : if (xfs_da_compname(args, sfep->name, sfep->namelen) ==
1100 : XFS_CMP_EXACT) {
1101 27622405 : ino = xfs_dir2_sf_get_ino(mp, sfp, sfep);
1102 27622405 : ASSERT(args->inumber != ino);
1103 27622405 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
1104 : args->inumber);
1105 27622315 : xfs_dir2_sf_put_ftype(mp, sfep, args->filetype);
1106 27622315 : break;
1107 : }
1108 : }
1109 : /*
1110 : * Didn't find it.
1111 : */
1112 27622332 : if (i == sfp->count) {
1113 0 : ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
1114 0 : if (i8elevated)
1115 0 : xfs_dir2_sf_toino4(args);
1116 0 : return -ENOENT;
1117 : }
1118 : }
1119 : /*
1120 : * See if the old number was large, the new number is small.
1121 : */
1122 45921660 : if (ino > XFS_DIR2_MAX_SHORT_INUM &&
1123 0 : args->inumber <= XFS_DIR2_MAX_SHORT_INUM) {
1124 : /*
1125 : * And the old count was one, so need to convert to small.
1126 : */
1127 0 : if (sfp->i8count == 1)
1128 0 : xfs_dir2_sf_toino4(args);
1129 : else
1130 0 : sfp->i8count--;
1131 : }
1132 : /*
1133 : * See if the old number was small, the new number is large.
1134 : */
1135 45921660 : if (ino <= XFS_DIR2_MAX_SHORT_INUM &&
1136 45921626 : args->inumber > XFS_DIR2_MAX_SHORT_INUM) {
1137 : /*
1138 : * add to the i8count unless we just converted to 8-byte
1139 : * inodes (which does an implied i8count = 1)
1140 : */
1141 0 : ASSERT(sfp->i8count != 0);
1142 0 : if (!i8elevated)
1143 0 : sfp->i8count++;
1144 : }
1145 45921660 : xfs_dir2_sf_check(args);
1146 45921761 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_DDATA);
1147 45921761 : return 0;
1148 : }
1149 :
1150 : /*
1151 : * Convert from 8-byte inode numbers to 4-byte inode numbers.
1152 : * The last 8-byte inode number is gone, but the count is still 1.
1153 : */
1154 : static void
1155 0 : xfs_dir2_sf_toino4(
1156 : xfs_da_args_t *args) /* operation arguments */
1157 : {
1158 0 : struct xfs_inode *dp = args->dp;
1159 0 : struct xfs_mount *mp = dp->i_mount;
1160 0 : char *buf; /* old dir's buffer */
1161 0 : int i; /* entry index */
1162 0 : int newsize; /* new inode size */
1163 0 : xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1164 0 : xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1165 0 : int oldsize; /* old inode size */
1166 0 : xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1167 0 : xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1168 :
1169 0 : trace_xfs_dir2_sf_toino4(args);
1170 :
1171 : /*
1172 : * Copy the old directory to the buffer.
1173 : * Then nuke it from the inode, and add the new buffer to the inode.
1174 : * Don't want xfs_idata_realloc copying the data here.
1175 : */
1176 0 : oldsize = dp->i_df.if_bytes;
1177 0 : buf = kmem_alloc(oldsize, 0);
1178 0 : oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1179 0 : ASSERT(oldsfp->i8count == 1);
1180 0 : memcpy(buf, oldsfp, oldsize);
1181 : /*
1182 : * Compute the new inode size.
1183 : */
1184 0 : newsize = oldsize - (oldsfp->count + 1) * XFS_INO64_DIFF;
1185 0 : xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1186 0 : xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1187 : /*
1188 : * Reset our pointers, the data has moved.
1189 : */
1190 0 : oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1191 0 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1192 : /*
1193 : * Fill in the new header.
1194 : */
1195 0 : sfp->count = oldsfp->count;
1196 0 : sfp->i8count = 0;
1197 0 : xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
1198 : /*
1199 : * Copy the entries field by field.
1200 : */
1201 0 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1202 : oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1203 0 : i < sfp->count;
1204 0 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep),
1205 : oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
1206 0 : sfep->namelen = oldsfep->namelen;
1207 0 : memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
1208 0 : memcpy(sfep->name, oldsfep->name, sfep->namelen);
1209 0 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
1210 : xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
1211 0 : xfs_dir2_sf_put_ftype(mp, sfep,
1212 : xfs_dir2_sf_get_ftype(mp, oldsfep));
1213 : }
1214 : /*
1215 : * Clean up the inode.
1216 : */
1217 0 : kmem_free(buf);
1218 0 : dp->i_disk_size = newsize;
1219 0 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1220 0 : }
1221 :
1222 : /*
1223 : * Convert existing entries from 4-byte inode numbers to 8-byte inode numbers.
1224 : * The new entry w/ an 8-byte inode number is not there yet; we leave with
1225 : * i8count set to 1, but no corresponding 8-byte entry.
1226 : */
1227 : static void
1228 0 : xfs_dir2_sf_toino8(
1229 : xfs_da_args_t *args) /* operation arguments */
1230 : {
1231 0 : struct xfs_inode *dp = args->dp;
1232 0 : struct xfs_mount *mp = dp->i_mount;
1233 0 : char *buf; /* old dir's buffer */
1234 0 : int i; /* entry index */
1235 0 : int newsize; /* new inode size */
1236 0 : xfs_dir2_sf_entry_t *oldsfep; /* old sf entry */
1237 0 : xfs_dir2_sf_hdr_t *oldsfp; /* old sf directory */
1238 0 : int oldsize; /* old inode size */
1239 0 : xfs_dir2_sf_entry_t *sfep; /* new sf entry */
1240 0 : xfs_dir2_sf_hdr_t *sfp; /* new sf directory */
1241 :
1242 0 : trace_xfs_dir2_sf_toino8(args);
1243 :
1244 : /*
1245 : * Copy the old directory to the buffer.
1246 : * Then nuke it from the inode, and add the new buffer to the inode.
1247 : * Don't want xfs_idata_realloc copying the data here.
1248 : */
1249 0 : oldsize = dp->i_df.if_bytes;
1250 0 : buf = kmem_alloc(oldsize, 0);
1251 0 : oldsfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1252 0 : ASSERT(oldsfp->i8count == 0);
1253 0 : memcpy(buf, oldsfp, oldsize);
1254 : /*
1255 : * Compute the new inode size (nb: entry count + 1 for parent)
1256 : */
1257 0 : newsize = oldsize + (oldsfp->count + 1) * XFS_INO64_DIFF;
1258 0 : xfs_idata_realloc(dp, -oldsize, XFS_DATA_FORK);
1259 0 : xfs_idata_realloc(dp, newsize, XFS_DATA_FORK);
1260 : /*
1261 : * Reset our pointers, the data has moved.
1262 : */
1263 0 : oldsfp = (xfs_dir2_sf_hdr_t *)buf;
1264 0 : sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data;
1265 : /*
1266 : * Fill in the new header.
1267 : */
1268 0 : sfp->count = oldsfp->count;
1269 0 : sfp->i8count = 1;
1270 0 : xfs_dir2_sf_put_parent_ino(sfp, xfs_dir2_sf_get_parent_ino(oldsfp));
1271 : /*
1272 : * Copy the entries field by field.
1273 : */
1274 0 : for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp),
1275 : oldsfep = xfs_dir2_sf_firstentry(oldsfp);
1276 0 : i < sfp->count;
1277 0 : i++, sfep = xfs_dir2_sf_nextentry(mp, sfp, sfep),
1278 : oldsfep = xfs_dir2_sf_nextentry(mp, oldsfp, oldsfep)) {
1279 0 : sfep->namelen = oldsfep->namelen;
1280 0 : memcpy(sfep->offset, oldsfep->offset, sizeof(sfep->offset));
1281 0 : memcpy(sfep->name, oldsfep->name, sfep->namelen);
1282 0 : xfs_dir2_sf_put_ino(mp, sfp, sfep,
1283 : xfs_dir2_sf_get_ino(mp, oldsfp, oldsfep));
1284 0 : xfs_dir2_sf_put_ftype(mp, sfep,
1285 : xfs_dir2_sf_get_ftype(mp, oldsfep));
1286 : }
1287 : /*
1288 : * Clean up the inode.
1289 : */
1290 0 : kmem_free(buf);
1291 0 : dp->i_disk_size = newsize;
1292 0 : xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_DDATA);
1293 0 : }
|
