Commit | Line | Data |
---|---|---|
5f2aa075 NJ |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* | |
3 | * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. | |
4 | */ | |
5 | ||
6 | #include <linux/iversion.h> | |
7 | #include <linux/namei.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/buffer_head.h> | |
10 | #include <linux/nls.h> | |
11 | ||
12 | #include "exfat_raw.h" | |
13 | #include "exfat_fs.h" | |
14 | ||
15 | static inline unsigned long exfat_d_version(struct dentry *dentry) | |
16 | { | |
17 | return (unsigned long) dentry->d_fsdata; | |
18 | } | |
19 | ||
20 | static inline void exfat_d_version_set(struct dentry *dentry, | |
21 | unsigned long version) | |
22 | { | |
23 | dentry->d_fsdata = (void *) version; | |
24 | } | |
25 | ||
26 | /* | |
27 | * If new entry was created in the parent, it could create the 8.3 alias (the | |
28 | * shortname of logname). So, the parent may have the negative-dentry which | |
29 | * matches the created 8.3 alias. | |
30 | * | |
31 | * If it happened, the negative dentry isn't actually negative anymore. So, | |
32 | * drop it. | |
33 | */ | |
34 | static int exfat_d_revalidate(struct dentry *dentry, unsigned int flags) | |
35 | { | |
36 | int ret; | |
37 | ||
38 | if (flags & LOOKUP_RCU) | |
39 | return -ECHILD; | |
40 | ||
41 | /* | |
42 | * This is not negative dentry. Always valid. | |
43 | * | |
44 | * Note, rename() to existing directory entry will have ->d_inode, and | |
45 | * will use existing name which isn't specified name by user. | |
46 | * | |
47 | * We may be able to drop this positive dentry here. But dropping | |
48 | * positive dentry isn't good idea. So it's unsupported like | |
49 | * rename("filename", "FILENAME") for now. | |
50 | */ | |
51 | if (d_really_is_positive(dentry)) | |
52 | return 1; | |
53 | ||
54 | /* | |
55 | * Drop the negative dentry, in order to make sure to use the case | |
56 | * sensitive name which is specified by user if this is for creation. | |
57 | */ | |
58 | if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET)) | |
59 | return 0; | |
60 | ||
61 | spin_lock(&dentry->d_lock); | |
62 | ret = inode_eq_iversion(d_inode(dentry->d_parent), | |
63 | exfat_d_version(dentry)); | |
64 | spin_unlock(&dentry->d_lock); | |
65 | return ret; | |
66 | } | |
67 | ||
9ec784bf VK |
68 | /* returns the length of a struct qstr, ignoring trailing dots if necessary */ |
69 | static unsigned int exfat_striptail_len(unsigned int len, const char *name, | |
70 | bool keep_last_dots) | |
5f2aa075 | 71 | { |
9ec784bf VK |
72 | if (!keep_last_dots) { |
73 | while (len && name[len - 1] == '.') | |
74 | len--; | |
75 | } | |
5f2aa075 NJ |
76 | return len; |
77 | } | |
78 | ||
79 | /* | |
80 | * Compute the hash for the exfat name corresponding to the dentry. If the name | |
81 | * is invalid, we leave the hash code unchanged so that the existing dentry can | |
82 | * be used. The exfat fs routines will return ENOENT or EINVAL as appropriate. | |
83 | */ | |
84 | static int exfat_d_hash(const struct dentry *dentry, struct qstr *qstr) | |
85 | { | |
86 | struct super_block *sb = dentry->d_sb; | |
87 | struct nls_table *t = EXFAT_SB(sb)->nls_io; | |
88 | const unsigned char *name = qstr->name; | |
9ec784bf VK |
89 | unsigned int len = exfat_striptail_len(qstr->len, qstr->name, |
90 | EXFAT_SB(sb)->options.keep_last_dots); | |
5f2aa075 NJ |
91 | unsigned long hash = init_name_hash(dentry); |
92 | int i, charlen; | |
93 | wchar_t c; | |
94 | ||
95 | for (i = 0; i < len; i += charlen) { | |
96 | charlen = t->char2uni(&name[i], len - i, &c); | |
97 | if (charlen < 0) | |
98 | return charlen; | |
99 | hash = partial_name_hash(exfat_toupper(sb, c), hash); | |
100 | } | |
101 | ||
102 | qstr->hash = end_name_hash(hash); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static int exfat_d_cmp(const struct dentry *dentry, unsigned int len, | |
107 | const char *str, const struct qstr *name) | |
108 | { | |
109 | struct super_block *sb = dentry->d_sb; | |
110 | struct nls_table *t = EXFAT_SB(sb)->nls_io; | |
9ec784bf VK |
111 | unsigned int alen = exfat_striptail_len(name->len, name->name, |
112 | EXFAT_SB(sb)->options.keep_last_dots); | |
113 | unsigned int blen = exfat_striptail_len(len, str, | |
114 | EXFAT_SB(sb)->options.keep_last_dots); | |
5f2aa075 NJ |
115 | wchar_t c1, c2; |
116 | int charlen, i; | |
117 | ||
118 | if (alen != blen) | |
119 | return 1; | |
120 | ||
121 | for (i = 0; i < len; i += charlen) { | |
122 | charlen = t->char2uni(&name->name[i], alen - i, &c1); | |
123 | if (charlen < 0) | |
124 | return 1; | |
125 | if (charlen != t->char2uni(&str[i], blen - i, &c2)) | |
126 | return 1; | |
127 | ||
128 | if (exfat_toupper(sb, c1) != exfat_toupper(sb, c2)) | |
129 | return 1; | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | const struct dentry_operations exfat_dentry_ops = { | |
136 | .d_revalidate = exfat_d_revalidate, | |
137 | .d_hash = exfat_d_hash, | |
138 | .d_compare = exfat_d_cmp, | |
139 | }; | |
140 | ||
141 | static int exfat_utf8_d_hash(const struct dentry *dentry, struct qstr *qstr) | |
142 | { | |
143 | struct super_block *sb = dentry->d_sb; | |
144 | const unsigned char *name = qstr->name; | |
9ec784bf VK |
145 | unsigned int len = exfat_striptail_len(qstr->len, qstr->name, |
146 | EXFAT_SB(sb)->options.keep_last_dots); | |
5f2aa075 NJ |
147 | unsigned long hash = init_name_hash(dentry); |
148 | int i, charlen; | |
149 | unicode_t u; | |
150 | ||
151 | for (i = 0; i < len; i += charlen) { | |
152 | charlen = utf8_to_utf32(&name[i], len - i, &u); | |
153 | if (charlen < 0) | |
154 | return charlen; | |
155 | ||
156 | /* | |
5f2aa075 NJ |
157 | * exfat_toupper() works only for code points up to the U+FFFF. |
158 | */ | |
dddf7da3 PR |
159 | hash = partial_name_hash(u <= 0xFFFF ? exfat_toupper(sb, u) : u, |
160 | hash); | |
5f2aa075 NJ |
161 | } |
162 | ||
163 | qstr->hash = end_name_hash(hash); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static int exfat_utf8_d_cmp(const struct dentry *dentry, unsigned int len, | |
168 | const char *str, const struct qstr *name) | |
169 | { | |
170 | struct super_block *sb = dentry->d_sb; | |
9ec784bf VK |
171 | unsigned int alen = exfat_striptail_len(name->len, name->name, |
172 | EXFAT_SB(sb)->options.keep_last_dots); | |
173 | unsigned int blen = exfat_striptail_len(len, str, | |
174 | EXFAT_SB(sb)->options.keep_last_dots); | |
175 | ||
5f2aa075 NJ |
176 | unicode_t u_a, u_b; |
177 | int charlen, i; | |
178 | ||
179 | if (alen != blen) | |
180 | return 1; | |
181 | ||
182 | for (i = 0; i < alen; i += charlen) { | |
183 | charlen = utf8_to_utf32(&name->name[i], alen - i, &u_a); | |
184 | if (charlen < 0) | |
185 | return 1; | |
186 | if (charlen != utf8_to_utf32(&str[i], blen - i, &u_b)) | |
187 | return 1; | |
188 | ||
189 | if (u_a <= 0xFFFF && u_b <= 0xFFFF) { | |
190 | if (exfat_toupper(sb, u_a) != exfat_toupper(sb, u_b)) | |
191 | return 1; | |
5f2aa075 | 192 | } else { |
197298a6 PR |
193 | if (u_a != u_b) |
194 | return 1; | |
5f2aa075 NJ |
195 | } |
196 | } | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | const struct dentry_operations exfat_utf8_dentry_ops = { | |
202 | .d_revalidate = exfat_d_revalidate, | |
203 | .d_hash = exfat_utf8_d_hash, | |
204 | .d_compare = exfat_utf8_d_cmp, | |
205 | }; | |
206 | ||
207 | /* used only in search empty_slot() */ | |
208 | #define CNT_UNUSED_NOHIT (-1) | |
209 | #define CNT_UNUSED_HIT (-2) | |
210 | /* search EMPTY CONTINUOUS "num_entries" entries */ | |
211 | static int exfat_search_empty_slot(struct super_block *sb, | |
212 | struct exfat_hint_femp *hint_femp, struct exfat_chain *p_dir, | |
213 | int num_entries) | |
214 | { | |
215 | int i, dentry, num_empty = 0; | |
216 | int dentries_per_clu; | |
217 | unsigned int type; | |
218 | struct exfat_chain clu; | |
219 | struct exfat_dentry *ep; | |
220 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
221 | struct buffer_head *bh; | |
222 | ||
223 | dentries_per_clu = sbi->dentries_per_clu; | |
224 | ||
225 | if (hint_femp->eidx != EXFAT_HINT_NONE) { | |
226 | dentry = hint_femp->eidx; | |
5f2aa075 | 227 | |
e298c8a8 YM |
228 | /* |
229 | * If hint_femp->count is enough, it is needed to check if | |
230 | * there are actual empty entries. | |
231 | * Otherwise, and if "dentry + hint_famp->count" is also equal | |
232 | * to "p_dir->size * dentries_per_clu", it means ENOSPC. | |
233 | */ | |
234 | if (dentry + hint_femp->count == p_dir->size * dentries_per_clu && | |
235 | num_entries > hint_femp->count) | |
236 | return -ENOSPC; | |
237 | ||
238 | hint_femp->eidx = EXFAT_HINT_NONE; | |
5f2aa075 NJ |
239 | exfat_chain_dup(&clu, &hint_femp->cur); |
240 | } else { | |
241 | exfat_chain_dup(&clu, p_dir); | |
242 | dentry = 0; | |
243 | } | |
244 | ||
245 | while (clu.dir != EXFAT_EOF_CLUSTER) { | |
246 | i = dentry & (dentries_per_clu - 1); | |
247 | ||
248 | for (; i < dentries_per_clu; i++, dentry++) { | |
c71510b3 | 249 | ep = exfat_get_dentry(sb, &clu, i, &bh); |
5f2aa075 NJ |
250 | if (!ep) |
251 | return -EIO; | |
252 | type = exfat_get_entry_type(ep); | |
253 | brelse(bh); | |
254 | ||
255 | if (type == TYPE_UNUSED || type == TYPE_DELETED) { | |
256 | num_empty++; | |
257 | if (hint_femp->eidx == EXFAT_HINT_NONE) { | |
258 | hint_femp->eidx = dentry; | |
259 | hint_femp->count = CNT_UNUSED_NOHIT; | |
260 | exfat_chain_set(&hint_femp->cur, | |
261 | clu.dir, clu.size, clu.flags); | |
262 | } | |
263 | ||
264 | if (type == TYPE_UNUSED && | |
265 | hint_femp->count != CNT_UNUSED_HIT) | |
266 | hint_femp->count = CNT_UNUSED_HIT; | |
267 | } else { | |
268 | if (hint_femp->eidx != EXFAT_HINT_NONE && | |
269 | hint_femp->count == CNT_UNUSED_HIT) { | |
270 | /* unused empty group means | |
271 | * an empty group which includes | |
272 | * unused dentry | |
273 | */ | |
274 | exfat_fs_error(sb, | |
275 | "found bogus dentry(%d) beyond unused empty group(%d) (start_clu : %u, cur_clu : %u)", | |
276 | dentry, hint_femp->eidx, | |
277 | p_dir->dir, clu.dir); | |
278 | return -EIO; | |
279 | } | |
280 | ||
281 | num_empty = 0; | |
282 | hint_femp->eidx = EXFAT_HINT_NONE; | |
283 | } | |
284 | ||
285 | if (num_empty >= num_entries) { | |
286 | /* found and invalidate hint_femp */ | |
287 | hint_femp->eidx = EXFAT_HINT_NONE; | |
288 | return (dentry - (num_entries - 1)); | |
289 | } | |
290 | } | |
291 | ||
292 | if (clu.flags == ALLOC_NO_FAT_CHAIN) { | |
293 | if (--clu.size > 0) | |
294 | clu.dir++; | |
295 | else | |
296 | clu.dir = EXFAT_EOF_CLUSTER; | |
297 | } else { | |
298 | if (exfat_get_next_cluster(sb, &clu.dir)) | |
299 | return -EIO; | |
300 | } | |
301 | } | |
302 | ||
e298c8a8 YM |
303 | hint_femp->eidx = p_dir->size * dentries_per_clu - num_empty; |
304 | hint_femp->count = num_empty; | |
305 | if (num_empty == 0) | |
306 | exfat_chain_set(&hint_femp->cur, EXFAT_EOF_CLUSTER, 0, | |
307 | clu.flags); | |
308 | ||
5f2aa075 NJ |
309 | return -ENOSPC; |
310 | } | |
311 | ||
312 | static int exfat_check_max_dentries(struct inode *inode) | |
313 | { | |
314 | if (EXFAT_B_TO_DEN(i_size_read(inode)) >= MAX_EXFAT_DENTRIES) { | |
315 | /* | |
9e456aea | 316 | * exFAT spec allows a dir to grow up to 8388608(256MB) |
5f2aa075 NJ |
317 | * dentries |
318 | */ | |
319 | return -ENOSPC; | |
320 | } | |
321 | return 0; | |
322 | } | |
323 | ||
324 | /* find empty directory entry. | |
325 | * if there isn't any empty slot, expand cluster chain. | |
326 | */ | |
327 | static int exfat_find_empty_entry(struct inode *inode, | |
328 | struct exfat_chain *p_dir, int num_entries) | |
329 | { | |
330 | int dentry; | |
331 | unsigned int ret, last_clu; | |
5f2aa075 NJ |
332 | loff_t size = 0; |
333 | struct exfat_chain clu; | |
5f2aa075 NJ |
334 | struct super_block *sb = inode->i_sb; |
335 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
336 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
337 | struct exfat_hint_femp hint_femp; | |
338 | ||
339 | hint_femp.eidx = EXFAT_HINT_NONE; | |
340 | ||
341 | if (ei->hint_femp.eidx != EXFAT_HINT_NONE) { | |
a7a24168 | 342 | hint_femp = ei->hint_femp; |
5f2aa075 NJ |
343 | ei->hint_femp.eidx = EXFAT_HINT_NONE; |
344 | } | |
345 | ||
346 | while ((dentry = exfat_search_empty_slot(sb, &hint_femp, p_dir, | |
347 | num_entries)) < 0) { | |
348 | if (dentry == -EIO) | |
349 | break; | |
350 | ||
351 | if (exfat_check_max_dentries(inode)) | |
352 | return -ENOSPC; | |
353 | ||
5f2aa075 NJ |
354 | /* |
355 | * Allocate new cluster to this directory | |
356 | */ | |
dab48b8f YM |
357 | if (ei->start_clu != EXFAT_EOF_CLUSTER) { |
358 | /* we trust p_dir->size regardless of FAT type */ | |
359 | if (exfat_find_last_cluster(sb, p_dir, &last_clu)) | |
360 | return -EIO; | |
361 | ||
362 | exfat_chain_set(&clu, last_clu + 1, 0, p_dir->flags); | |
363 | } else { | |
364 | /* This directory is empty */ | |
365 | exfat_chain_set(&clu, EXFAT_EOF_CLUSTER, 0, | |
366 | ALLOC_NO_FAT_CHAIN); | |
367 | } | |
5f2aa075 NJ |
368 | |
369 | /* allocate a cluster */ | |
23befe49 | 370 | ret = exfat_alloc_cluster(inode, 1, &clu, IS_DIRSYNC(inode)); |
5f2aa075 NJ |
371 | if (ret) |
372 | return ret; | |
373 | ||
374 | if (exfat_zeroed_cluster(inode, clu.dir)) | |
375 | return -EIO; | |
376 | ||
dab48b8f YM |
377 | if (ei->start_clu == EXFAT_EOF_CLUSTER) { |
378 | ei->start_clu = clu.dir; | |
379 | p_dir->dir = clu.dir; | |
380 | } | |
381 | ||
5f2aa075 NJ |
382 | /* append to the FAT chain */ |
383 | if (clu.flags != p_dir->flags) { | |
384 | /* no-fat-chain bit is disabled, | |
385 | * so fat-chain should be synced with alloc-bitmap | |
386 | */ | |
387 | exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size); | |
388 | p_dir->flags = ALLOC_FAT_CHAIN; | |
389 | hint_femp.cur.flags = ALLOC_FAT_CHAIN; | |
390 | } | |
391 | ||
392 | if (clu.flags == ALLOC_FAT_CHAIN) | |
393 | if (exfat_ent_set(sb, last_clu, clu.dir)) | |
394 | return -EIO; | |
395 | ||
e298c8a8 | 396 | if (hint_femp.cur.dir == EXFAT_EOF_CLUSTER) |
5f2aa075 | 397 | exfat_chain_set(&hint_femp.cur, clu.dir, 0, clu.flags); |
e298c8a8 YM |
398 | |
399 | hint_femp.count += sbi->dentries_per_clu; | |
400 | ||
5f2aa075 NJ |
401 | hint_femp.cur.size++; |
402 | p_dir->size++; | |
403 | size = EXFAT_CLU_TO_B(p_dir->size, sbi); | |
404 | ||
5f2aa075 NJ |
405 | /* directory inode should be updated in here */ |
406 | i_size_write(inode, size); | |
7dee6f57 CVB |
407 | ei->i_size_ondisk += sbi->cluster_size; |
408 | ei->i_size_aligned += sbi->cluster_size; | |
11a347fb | 409 | ei->valid_size += sbi->cluster_size; |
7dee6f57 | 410 | ei->flags = p_dir->flags; |
39c1ce8e | 411 | inode->i_blocks += sbi->cluster_size >> 9; |
5f2aa075 NJ |
412 | } |
413 | ||
414 | return dentry; | |
415 | } | |
416 | ||
417 | /* | |
418 | * Name Resolution Functions : | |
419 | * Zero if it was successful; otherwise nonzero. | |
420 | */ | |
421 | static int __exfat_resolve_path(struct inode *inode, const unsigned char *path, | |
422 | struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, | |
423 | int lookup) | |
424 | { | |
425 | int namelen; | |
426 | int lossy = NLS_NAME_NO_LOSSY; | |
427 | struct super_block *sb = inode->i_sb; | |
428 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
429 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
9ec784bf | 430 | int pathlen = strlen(path); |
5f2aa075 | 431 | |
9ec784bf VK |
432 | /* |
433 | * get the length of the pathname excluding | |
434 | * trailing periods, if any. | |
435 | */ | |
436 | namelen = exfat_striptail_len(pathlen, path, false); | |
437 | if (EXFAT_SB(sb)->options.keep_last_dots) { | |
438 | /* | |
439 | * Do not allow the creation of files with names | |
440 | * ending with period(s). | |
441 | */ | |
442 | if (!lookup && (namelen < pathlen)) | |
443 | return -EINVAL; | |
444 | namelen = pathlen; | |
445 | } | |
5f2aa075 NJ |
446 | if (!namelen) |
447 | return -ENOENT; | |
9ec784bf | 448 | if (pathlen > (MAX_NAME_LENGTH * MAX_CHARSET_SIZE)) |
5f2aa075 NJ |
449 | return -ENAMETOOLONG; |
450 | ||
451 | /* | |
452 | * strip all leading spaces : | |
453 | * "MS windows 7" supports leading spaces. | |
454 | * So we should skip this preprocessing for compatibility. | |
455 | */ | |
456 | ||
457 | /* file name conversion : | |
458 | * If lookup case, we allow bad-name for compatibility. | |
459 | */ | |
460 | namelen = exfat_nls_to_utf16(sb, path, namelen, p_uniname, | |
461 | &lossy); | |
462 | if (namelen < 0) | |
463 | return namelen; /* return error value */ | |
464 | ||
465 | if ((lossy && !lookup) || !namelen) | |
86da53e8 | 466 | return (lossy & NLS_NAME_OVERLEN) ? -ENAMETOOLONG : -EINVAL; |
5f2aa075 NJ |
467 | |
468 | exfat_chain_set(p_dir, ei->start_clu, | |
469 | EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags); | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static inline int exfat_resolve_path(struct inode *inode, | |
475 | const unsigned char *path, struct exfat_chain *dir, | |
476 | struct exfat_uni_name *uni) | |
477 | { | |
478 | return __exfat_resolve_path(inode, path, dir, uni, 0); | |
479 | } | |
480 | ||
481 | static inline int exfat_resolve_path_for_lookup(struct inode *inode, | |
482 | const unsigned char *path, struct exfat_chain *dir, | |
483 | struct exfat_uni_name *uni) | |
484 | { | |
485 | return __exfat_resolve_path(inode, path, dir, uni, 1); | |
486 | } | |
487 | ||
488 | static inline loff_t exfat_make_i_pos(struct exfat_dir_entry *info) | |
489 | { | |
490 | return ((loff_t) info->dir.dir << 32) | (info->entry & 0xffffffff); | |
491 | } | |
492 | ||
493 | static int exfat_add_entry(struct inode *inode, const char *path, | |
494 | struct exfat_chain *p_dir, unsigned int type, | |
495 | struct exfat_dir_entry *info) | |
496 | { | |
497 | int ret, dentry, num_entries; | |
498 | struct super_block *sb = inode->i_sb; | |
499 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
500 | struct exfat_uni_name uniname; | |
501 | struct exfat_chain clu; | |
cf8663fa YM |
502 | struct timespec64 ts = current_time(inode); |
503 | struct exfat_entry_set_cache es; | |
5f2aa075 NJ |
504 | int clu_size = 0; |
505 | unsigned int start_clu = EXFAT_FREE_CLUSTER; | |
506 | ||
507 | ret = exfat_resolve_path(inode, path, p_dir, &uniname); | |
508 | if (ret) | |
509 | goto out; | |
510 | ||
511 | num_entries = exfat_calc_num_entries(&uniname); | |
512 | if (num_entries < 0) { | |
513 | ret = num_entries; | |
514 | goto out; | |
515 | } | |
516 | ||
517 | /* exfat_find_empty_entry must be called before alloc_cluster() */ | |
518 | dentry = exfat_find_empty_entry(inode, p_dir, num_entries); | |
519 | if (dentry < 0) { | |
520 | ret = dentry; /* -EIO or -ENOSPC */ | |
521 | goto out; | |
522 | } | |
523 | ||
ee785c15 | 524 | if (type == TYPE_DIR && !sbi->options.zero_size_dir) { |
5f2aa075 NJ |
525 | ret = exfat_alloc_new_dir(inode, &clu); |
526 | if (ret) | |
527 | goto out; | |
528 | start_clu = clu.dir; | |
529 | clu_size = sbi->cluster_size; | |
530 | } | |
531 | ||
532 | /* update the directory entry */ | |
533 | /* fill the dos name directory entry information of the created file. | |
534 | * the first cluster is not determined yet. (0) | |
535 | */ | |
cf8663fa YM |
536 | |
537 | ret = exfat_get_empty_dentry_set(&es, sb, p_dir, dentry, num_entries); | |
538 | if (ret) | |
539 | goto out; | |
540 | ||
541 | exfat_init_dir_entry(&es, type, start_clu, clu_size, &ts); | |
542 | ||
543 | ret = exfat_put_dentry_set(&es, IS_DIRSYNC(inode)); | |
5f2aa075 NJ |
544 | if (ret) |
545 | goto out; | |
546 | ||
547 | ret = exfat_init_ext_entry(inode, p_dir, dentry, num_entries, &uniname); | |
548 | if (ret) | |
549 | goto out; | |
550 | ||
a7a24168 | 551 | info->dir = *p_dir; |
5f2aa075 NJ |
552 | info->entry = dentry; |
553 | info->flags = ALLOC_NO_FAT_CHAIN; | |
554 | info->type = type; | |
555 | ||
556 | if (type == TYPE_FILE) { | |
0ab8ba71 | 557 | info->attr = EXFAT_ATTR_ARCHIVE; |
5f2aa075 NJ |
558 | info->start_clu = EXFAT_EOF_CLUSTER; |
559 | info->size = 0; | |
560 | info->num_subdirs = 0; | |
561 | } else { | |
0ab8ba71 | 562 | info->attr = EXFAT_ATTR_SUBDIR; |
ee785c15 YM |
563 | if (sbi->options.zero_size_dir) |
564 | info->start_clu = EXFAT_EOF_CLUSTER; | |
565 | else | |
566 | info->start_clu = start_clu; | |
5f2aa075 | 567 | info->size = clu_size; |
6c958a09 | 568 | info->num_subdirs = EXFAT_MIN_SUBDIR; |
5f2aa075 | 569 | } |
11a347fb YM |
570 | info->valid_size = info->size; |
571 | ||
5f2aa075 NJ |
572 | memset(&info->crtime, 0, sizeof(info->crtime)); |
573 | memset(&info->mtime, 0, sizeof(info->mtime)); | |
574 | memset(&info->atime, 0, sizeof(info->atime)); | |
575 | out: | |
576 | return ret; | |
577 | } | |
578 | ||
6c960e68 | 579 | static int exfat_create(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 580 | struct dentry *dentry, umode_t mode, bool excl) |
5f2aa075 NJ |
581 | { |
582 | struct super_block *sb = dir->i_sb; | |
583 | struct inode *inode; | |
584 | struct exfat_chain cdir; | |
585 | struct exfat_dir_entry info; | |
586 | loff_t i_pos; | |
587 | int err; | |
588 | ||
589 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
7018ec68 | 590 | exfat_set_volume_dirty(sb); |
5f2aa075 NJ |
591 | err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_FILE, |
592 | &info); | |
5f2aa075 NJ |
593 | if (err) |
594 | goto unlock; | |
595 | ||
596 | inode_inc_iversion(dir); | |
4c72a36e | 597 | inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); |
5f2aa075 NJ |
598 | if (IS_DIRSYNC(dir)) |
599 | exfat_sync_inode(dir); | |
600 | else | |
601 | mark_inode_dirty(dir); | |
602 | ||
603 | i_pos = exfat_make_i_pos(&info); | |
604 | inode = exfat_build_inode(sb, &info, i_pos); | |
d6c9efd9 TK |
605 | err = PTR_ERR_OR_ZERO(inode); |
606 | if (err) | |
5f2aa075 NJ |
607 | goto unlock; |
608 | ||
609 | inode_inc_iversion(inode); | |
4c72a36e JL |
610 | EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode); |
611 | exfat_truncate_inode_atime(inode); | |
612 | ||
5f2aa075 NJ |
613 | /* timestamp is already written, so mark_inode_dirty() is unneeded. */ |
614 | ||
615 | d_instantiate(dentry, inode); | |
616 | unlock: | |
617 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
618 | return err; | |
619 | } | |
620 | ||
621 | /* lookup a file */ | |
622 | static int exfat_find(struct inode *dir, struct qstr *qname, | |
623 | struct exfat_dir_entry *info) | |
624 | { | |
72880cb5 | 625 | int ret, dentry, count; |
5f2aa075 NJ |
626 | struct exfat_chain cdir; |
627 | struct exfat_uni_name uni_name; | |
5f2aa075 NJ |
628 | struct super_block *sb = dir->i_sb; |
629 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
630 | struct exfat_inode_info *ei = EXFAT_I(dir); | |
188df41f | 631 | struct exfat_dentry *ep, *ep2; |
20914ff6 | 632 | struct exfat_entry_set_cache es; |
c6e2f52e HK |
633 | /* for optimized dir & entry to prevent long traverse of cluster chain */ |
634 | struct exfat_hint hint_opt; | |
5f2aa075 NJ |
635 | |
636 | if (qname->len == 0) | |
637 | return -ENOENT; | |
638 | ||
639 | /* check the validity of directory name in the given pathname */ | |
640 | ret = exfat_resolve_path_for_lookup(dir, qname->name, &cdir, &uni_name); | |
641 | if (ret) | |
642 | return ret; | |
643 | ||
5f2aa075 NJ |
644 | /* check the validation of hint_stat and initialize it if required */ |
645 | if (ei->version != (inode_peek_iversion_raw(dir) & 0xffffffff)) { | |
646 | ei->hint_stat.clu = cdir.dir; | |
647 | ei->hint_stat.eidx = 0; | |
648 | ei->version = (inode_peek_iversion_raw(dir) & 0xffffffff); | |
649 | ei->hint_femp.eidx = EXFAT_HINT_NONE; | |
650 | } | |
651 | ||
652 | /* search the file name for directories */ | |
72880cb5 | 653 | dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name, &hint_opt); |
188df41f | 654 | if (dentry < 0) |
5f2aa075 NJ |
655 | return dentry; /* -error value */ |
656 | ||
a7a24168 | 657 | info->dir = cdir; |
5f2aa075 NJ |
658 | info->entry = dentry; |
659 | info->num_subdirs = 0; | |
660 | ||
c6e2f52e HK |
661 | /* adjust cdir to the optimized value */ |
662 | cdir.dir = hint_opt.clu; | |
663 | if (cdir.flags & ALLOC_NO_FAT_CHAIN) | |
664 | cdir.size -= dentry / sbi->dentries_per_clu; | |
665 | dentry = hint_opt.eidx; | |
20914ff6 | 666 | if (exfat_get_dentry_set(&es, sb, &cdir, dentry, ES_2_ENTRIES)) |
188df41f | 667 | return -EIO; |
f3fe3954 YM |
668 | ep = exfat_get_dentry_cached(&es, ES_IDX_FILE); |
669 | ep2 = exfat_get_dentry_cached(&es, ES_IDX_STREAM); | |
188df41f TK |
670 | |
671 | info->type = exfat_get_entry_type(ep); | |
672 | info->attr = le16_to_cpu(ep->dentry.file.attr); | |
673 | info->size = le64_to_cpu(ep2->dentry.stream.valid_size); | |
11a347fb YM |
674 | info->valid_size = le64_to_cpu(ep2->dentry.stream.valid_size); |
675 | info->size = le64_to_cpu(ep2->dentry.stream.size); | |
dab48b8f | 676 | if (info->size == 0) { |
188df41f TK |
677 | info->flags = ALLOC_NO_FAT_CHAIN; |
678 | info->start_clu = EXFAT_EOF_CLUSTER; | |
679 | } else { | |
680 | info->flags = ep2->dentry.stream.flags; | |
681 | info->start_clu = | |
682 | le32_to_cpu(ep2->dentry.stream.start_clu); | |
683 | } | |
5f2aa075 | 684 | |
188df41f TK |
685 | exfat_get_entry_time(sbi, &info->crtime, |
686 | ep->dentry.file.create_tz, | |
687 | ep->dentry.file.create_time, | |
688 | ep->dentry.file.create_date, | |
689 | ep->dentry.file.create_time_cs); | |
690 | exfat_get_entry_time(sbi, &info->mtime, | |
691 | ep->dentry.file.modify_tz, | |
692 | ep->dentry.file.modify_time, | |
693 | ep->dentry.file.modify_date, | |
694 | ep->dentry.file.modify_time_cs); | |
695 | exfat_get_entry_time(sbi, &info->atime, | |
696 | ep->dentry.file.access_tz, | |
697 | ep->dentry.file.access_time, | |
698 | ep->dentry.file.access_date, | |
699 | 0); | |
3b9681ac | 700 | exfat_put_dentry_set(&es, false); |
188df41f TK |
701 | |
702 | if (ei->start_clu == EXFAT_FREE_CLUSTER) { | |
703 | exfat_fs_error(sb, | |
704 | "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)", | |
705 | i_size_read(dir), ei->dir.dir, ei->entry); | |
706 | return -EIO; | |
707 | } | |
5f2aa075 | 708 | |
188df41f TK |
709 | if (info->type == TYPE_DIR) { |
710 | exfat_chain_set(&cdir, info->start_clu, | |
711 | EXFAT_B_TO_CLU(info->size, sbi), info->flags); | |
5f2aa075 NJ |
712 | count = exfat_count_dir_entries(sb, &cdir); |
713 | if (count < 0) | |
714 | return -EIO; | |
715 | ||
188df41f | 716 | info->num_subdirs = count + EXFAT_MIN_SUBDIR; |
5f2aa075 NJ |
717 | } |
718 | return 0; | |
719 | } | |
720 | ||
721 | static int exfat_d_anon_disconn(struct dentry *dentry) | |
722 | { | |
723 | return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED); | |
724 | } | |
725 | ||
726 | static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry, | |
727 | unsigned int flags) | |
728 | { | |
729 | struct super_block *sb = dir->i_sb; | |
730 | struct inode *inode; | |
731 | struct dentry *alias; | |
732 | struct exfat_dir_entry info; | |
733 | int err; | |
734 | loff_t i_pos; | |
735 | mode_t i_mode; | |
736 | ||
737 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
738 | err = exfat_find(dir, &dentry->d_name, &info); | |
739 | if (err) { | |
740 | if (err == -ENOENT) { | |
741 | inode = NULL; | |
742 | goto out; | |
743 | } | |
744 | goto unlock; | |
745 | } | |
746 | ||
747 | i_pos = exfat_make_i_pos(&info); | |
748 | inode = exfat_build_inode(sb, &info, i_pos); | |
d6c9efd9 TK |
749 | err = PTR_ERR_OR_ZERO(inode); |
750 | if (err) | |
5f2aa075 | 751 | goto unlock; |
5f2aa075 NJ |
752 | |
753 | i_mode = inode->i_mode; | |
754 | alias = d_find_alias(inode); | |
755 | ||
756 | /* | |
757 | * Checking "alias->d_parent == dentry->d_parent" to make sure | |
758 | * FS is not corrupted (especially double linked dir). | |
759 | */ | |
760 | if (alias && alias->d_parent == dentry->d_parent && | |
761 | !exfat_d_anon_disconn(alias)) { | |
762 | ||
763 | /* | |
764 | * Unhashed alias is able to exist because of revalidate() | |
765 | * called by lookup_fast. You can easily make this status | |
766 | * by calling create and lookup concurrently | |
767 | * In such case, we reuse an alias instead of new dentry | |
768 | */ | |
769 | if (d_unhashed(alias)) { | |
770 | WARN_ON(alias->d_name.hash_len != | |
771 | dentry->d_name.hash_len); | |
d1727d55 JP |
772 | exfat_info(sb, "rehashed a dentry(%p) in read lookup", |
773 | alias); | |
5f2aa075 NJ |
774 | d_drop(dentry); |
775 | d_rehash(alias); | |
776 | } else if (!S_ISDIR(i_mode)) { | |
777 | /* | |
778 | * This inode has non anonymous-DCACHE_DISCONNECTED | |
779 | * dentry. This means, the user did ->lookup() by an | |
780 | * another name (longname vs 8.3 alias of it) in past. | |
781 | * | |
782 | * Switch to new one for reason of locality if possible. | |
783 | */ | |
784 | d_move(alias, dentry); | |
785 | } | |
786 | iput(inode); | |
787 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
788 | return alias; | |
789 | } | |
790 | dput(alias); | |
791 | out: | |
792 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
793 | if (!inode) | |
794 | exfat_d_version_set(dentry, inode_query_iversion(dir)); | |
795 | ||
796 | return d_splice_alias(inode, dentry); | |
797 | unlock: | |
798 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
799 | return ERR_PTR(err); | |
800 | } | |
801 | ||
802 | /* remove an entry, BUT don't truncate */ | |
803 | static int exfat_unlink(struct inode *dir, struct dentry *dentry) | |
804 | { | |
805 | struct exfat_chain cdir; | |
5f2aa075 NJ |
806 | struct super_block *sb = dir->i_sb; |
807 | struct inode *inode = dentry->d_inode; | |
808 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
ff4343da YM |
809 | struct exfat_entry_set_cache es; |
810 | int entry, err = 0; | |
5f2aa075 NJ |
811 | |
812 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
813 | exfat_chain_dup(&cdir, &ei->dir); | |
814 | entry = ei->entry; | |
815 | if (ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 816 | exfat_err(sb, "abnormal access to deleted dentry"); |
5f2aa075 NJ |
817 | err = -ENOENT; |
818 | goto unlock; | |
819 | } | |
820 | ||
ff4343da YM |
821 | err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES); |
822 | if (err) { | |
5f2aa075 | 823 | err = -EIO; |
5f2aa075 NJ |
824 | goto unlock; |
825 | } | |
5f2aa075 | 826 | |
7018ec68 | 827 | exfat_set_volume_dirty(sb); |
ff4343da | 828 | |
5f2aa075 | 829 | /* update the directory entry */ |
ff4343da YM |
830 | exfat_remove_entries(inode, &es, ES_IDX_FILE); |
831 | ||
832 | err = exfat_put_dentry_set(&es, IS_DIRSYNC(inode)); | |
833 | if (err) | |
5f2aa075 | 834 | goto unlock; |
5f2aa075 NJ |
835 | |
836 | /* This doesn't modify ei */ | |
837 | ei->dir.dir = DIR_DELETED; | |
5f2aa075 NJ |
838 | |
839 | inode_inc_iversion(dir); | |
4c72a36e JL |
840 | simple_inode_init_ts(dir); |
841 | exfat_truncate_inode_atime(dir); | |
5f2aa075 NJ |
842 | if (IS_DIRSYNC(dir)) |
843 | exfat_sync_inode(dir); | |
844 | else | |
845 | mark_inode_dirty(dir); | |
846 | ||
847 | clear_nlink(inode); | |
4c72a36e JL |
848 | simple_inode_init_ts(inode); |
849 | exfat_truncate_inode_atime(inode); | |
5f2aa075 NJ |
850 | exfat_unhash_inode(inode); |
851 | exfat_d_version_set(dentry, inode_query_iversion(dir)); | |
852 | unlock: | |
853 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
854 | return err; | |
855 | } | |
856 | ||
c54bd91e | 857 | static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 858 | struct dentry *dentry, umode_t mode) |
5f2aa075 NJ |
859 | { |
860 | struct super_block *sb = dir->i_sb; | |
861 | struct inode *inode; | |
862 | struct exfat_dir_entry info; | |
863 | struct exfat_chain cdir; | |
864 | loff_t i_pos; | |
865 | int err; | |
866 | ||
867 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
7018ec68 | 868 | exfat_set_volume_dirty(sb); |
5f2aa075 NJ |
869 | err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_DIR, |
870 | &info); | |
5f2aa075 NJ |
871 | if (err) |
872 | goto unlock; | |
873 | ||
874 | inode_inc_iversion(dir); | |
4c72a36e | 875 | inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); |
5f2aa075 NJ |
876 | if (IS_DIRSYNC(dir)) |
877 | exfat_sync_inode(dir); | |
878 | else | |
879 | mark_inode_dirty(dir); | |
880 | inc_nlink(dir); | |
881 | ||
882 | i_pos = exfat_make_i_pos(&info); | |
883 | inode = exfat_build_inode(sb, &info, i_pos); | |
d6c9efd9 TK |
884 | err = PTR_ERR_OR_ZERO(inode); |
885 | if (err) | |
5f2aa075 | 886 | goto unlock; |
5f2aa075 NJ |
887 | |
888 | inode_inc_iversion(inode); | |
4c72a36e JL |
889 | EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode); |
890 | exfat_truncate_inode_atime(inode); | |
5f2aa075 NJ |
891 | /* timestamp is already written, so mark_inode_dirty() is unneeded. */ |
892 | ||
893 | d_instantiate(dentry, inode); | |
894 | ||
895 | unlock: | |
896 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
897 | return err; | |
898 | } | |
899 | ||
900 | static int exfat_check_dir_empty(struct super_block *sb, | |
901 | struct exfat_chain *p_dir) | |
902 | { | |
903 | int i, dentries_per_clu; | |
904 | unsigned int type; | |
905 | struct exfat_chain clu; | |
906 | struct exfat_dentry *ep; | |
907 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
908 | struct buffer_head *bh; | |
909 | ||
910 | dentries_per_clu = sbi->dentries_per_clu; | |
911 | ||
dab48b8f YM |
912 | if (p_dir->dir == EXFAT_EOF_CLUSTER) |
913 | return 0; | |
914 | ||
5f2aa075 NJ |
915 | exfat_chain_dup(&clu, p_dir); |
916 | ||
917 | while (clu.dir != EXFAT_EOF_CLUSTER) { | |
918 | for (i = 0; i < dentries_per_clu; i++) { | |
c71510b3 | 919 | ep = exfat_get_dentry(sb, &clu, i, &bh); |
5f2aa075 NJ |
920 | if (!ep) |
921 | return -EIO; | |
922 | type = exfat_get_entry_type(ep); | |
923 | brelse(bh); | |
924 | if (type == TYPE_UNUSED) | |
925 | return 0; | |
926 | ||
927 | if (type != TYPE_FILE && type != TYPE_DIR) | |
928 | continue; | |
929 | ||
930 | return -ENOTEMPTY; | |
931 | } | |
932 | ||
933 | if (clu.flags == ALLOC_NO_FAT_CHAIN) { | |
934 | if (--clu.size > 0) | |
935 | clu.dir++; | |
936 | else | |
937 | clu.dir = EXFAT_EOF_CLUSTER; | |
938 | } else { | |
939 | if (exfat_get_next_cluster(sb, &(clu.dir))) | |
940 | return -EIO; | |
941 | } | |
942 | } | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | static int exfat_rmdir(struct inode *dir, struct dentry *dentry) | |
948 | { | |
949 | struct inode *inode = dentry->d_inode; | |
5f2aa075 NJ |
950 | struct exfat_chain cdir, clu_to_free; |
951 | struct super_block *sb = inode->i_sb; | |
952 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
953 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
ff4343da YM |
954 | struct exfat_entry_set_cache es; |
955 | int entry, err; | |
5f2aa075 NJ |
956 | |
957 | mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock); | |
958 | ||
959 | exfat_chain_dup(&cdir, &ei->dir); | |
960 | entry = ei->entry; | |
961 | ||
962 | if (ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 963 | exfat_err(sb, "abnormal access to deleted dentry"); |
5f2aa075 NJ |
964 | err = -ENOENT; |
965 | goto unlock; | |
966 | } | |
967 | ||
5f2aa075 NJ |
968 | exfat_chain_set(&clu_to_free, ei->start_clu, |
969 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(inode), sbi), ei->flags); | |
970 | ||
971 | err = exfat_check_dir_empty(sb, &clu_to_free); | |
972 | if (err) { | |
973 | if (err == -EIO) | |
d1727d55 JP |
974 | exfat_err(sb, "failed to exfat_check_dir_empty : err(%d)", |
975 | err); | |
5f2aa075 NJ |
976 | goto unlock; |
977 | } | |
978 | ||
ff4343da YM |
979 | err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES); |
980 | if (err) { | |
5f2aa075 | 981 | err = -EIO; |
5f2aa075 NJ |
982 | goto unlock; |
983 | } | |
5f2aa075 | 984 | |
7018ec68 | 985 | exfat_set_volume_dirty(sb); |
ff4343da YM |
986 | |
987 | exfat_remove_entries(inode, &es, ES_IDX_FILE); | |
988 | ||
989 | err = exfat_put_dentry_set(&es, IS_DIRSYNC(dir)); | |
990 | if (err) | |
5f2aa075 | 991 | goto unlock; |
ff4343da | 992 | |
5f2aa075 | 993 | ei->dir.dir = DIR_DELETED; |
5f2aa075 NJ |
994 | |
995 | inode_inc_iversion(dir); | |
4c72a36e JL |
996 | simple_inode_init_ts(dir); |
997 | exfat_truncate_inode_atime(dir); | |
5f2aa075 NJ |
998 | if (IS_DIRSYNC(dir)) |
999 | exfat_sync_inode(dir); | |
1000 | else | |
1001 | mark_inode_dirty(dir); | |
1002 | drop_nlink(dir); | |
1003 | ||
1004 | clear_nlink(inode); | |
4c72a36e JL |
1005 | simple_inode_init_ts(inode); |
1006 | exfat_truncate_inode_atime(inode); | |
5f2aa075 NJ |
1007 | exfat_unhash_inode(inode); |
1008 | exfat_d_version_set(dentry, inode_query_iversion(dir)); | |
1009 | unlock: | |
1010 | mutex_unlock(&EXFAT_SB(inode->i_sb)->s_lock); | |
1011 | return err; | |
1012 | } | |
1013 | ||
1014 | static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir, | |
1015 | int oldentry, struct exfat_uni_name *p_uniname, | |
1016 | struct exfat_inode_info *ei) | |
1017 | { | |
ff4343da | 1018 | int ret, num_new_entries; |
5f2aa075 NJ |
1019 | struct exfat_dentry *epold, *epnew; |
1020 | struct super_block *sb = inode->i_sb; | |
ff4343da YM |
1021 | struct buffer_head *new_bh; |
1022 | struct exfat_entry_set_cache old_es; | |
5f2aa075 NJ |
1023 | int sync = IS_DIRSYNC(inode); |
1024 | ||
5f2aa075 NJ |
1025 | num_new_entries = exfat_calc_num_entries(p_uniname); |
1026 | if (num_new_entries < 0) | |
1027 | return num_new_entries; | |
1028 | ||
ff4343da YM |
1029 | ret = exfat_get_dentry_set(&old_es, sb, p_dir, oldentry, ES_ALL_ENTRIES); |
1030 | if (ret) { | |
1031 | ret = -EIO; | |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | epold = exfat_get_dentry_cached(&old_es, ES_IDX_FILE); | |
1036 | ||
1037 | if (old_es.num_entries < num_new_entries) { | |
5f2aa075 NJ |
1038 | int newentry; |
1039 | ||
1040 | newentry = | |
1041 | exfat_find_empty_entry(inode, p_dir, num_new_entries); | |
ff4343da YM |
1042 | if (newentry < 0) { |
1043 | ret = newentry; /* -EIO or -ENOSPC */ | |
1044 | goto put_old_es; | |
1045 | } | |
5f2aa075 | 1046 | |
c71510b3 | 1047 | epnew = exfat_get_dentry(sb, p_dir, newentry, &new_bh); |
ff4343da YM |
1048 | if (!epnew) { |
1049 | ret = -EIO; | |
1050 | goto put_old_es; | |
1051 | } | |
5f2aa075 | 1052 | |
a7a24168 | 1053 | *epnew = *epold; |
5f2aa075 | 1054 | if (exfat_get_entry_type(epnew) == TYPE_FILE) { |
0ab8ba71 JC |
1055 | epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); |
1056 | ei->attr |= EXFAT_ATTR_ARCHIVE; | |
5f2aa075 | 1057 | } |
2c7f8937 | 1058 | exfat_update_bh(new_bh, sync); |
5f2aa075 NJ |
1059 | brelse(new_bh); |
1060 | ||
ff4343da | 1061 | epold = exfat_get_dentry_cached(&old_es, ES_IDX_STREAM); |
c71510b3 | 1062 | epnew = exfat_get_dentry(sb, p_dir, newentry + 1, &new_bh); |
e8dd3cda | 1063 | if (!epnew) { |
ff4343da YM |
1064 | ret = -EIO; |
1065 | goto put_old_es; | |
e8dd3cda | 1066 | } |
5f2aa075 | 1067 | |
a7a24168 | 1068 | *epnew = *epold; |
2c7f8937 | 1069 | exfat_update_bh(new_bh, sync); |
5f2aa075 NJ |
1070 | brelse(new_bh); |
1071 | ||
1072 | ret = exfat_init_ext_entry(inode, p_dir, newentry, | |
1073 | num_new_entries, p_uniname); | |
1074 | if (ret) | |
ff4343da | 1075 | goto put_old_es; |
5f2aa075 | 1076 | |
ff4343da | 1077 | exfat_remove_entries(inode, &old_es, ES_IDX_FILE); |
d8dad258 | 1078 | ei->dir = *p_dir; |
5f2aa075 NJ |
1079 | ei->entry = newentry; |
1080 | } else { | |
1081 | if (exfat_get_entry_type(epold) == TYPE_FILE) { | |
0ab8ba71 JC |
1082 | epold->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); |
1083 | ei->attr |= EXFAT_ATTR_ARCHIVE; | |
5f2aa075 | 1084 | } |
5f2aa075 NJ |
1085 | ret = exfat_init_ext_entry(inode, p_dir, oldentry, |
1086 | num_new_entries, p_uniname); | |
1087 | if (ret) | |
ff4343da | 1088 | goto put_old_es; |
5f2aa075 | 1089 | |
ff4343da | 1090 | exfat_remove_entries(inode, &old_es, num_new_entries); |
5f2aa075 | 1091 | } |
ff4343da YM |
1092 | return exfat_put_dentry_set(&old_es, sync); |
1093 | ||
1094 | put_old_es: | |
1095 | exfat_put_dentry_set(&old_es, false); | |
1096 | return ret; | |
5f2aa075 NJ |
1097 | } |
1098 | ||
1099 | static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir, | |
1100 | int oldentry, struct exfat_chain *p_newdir, | |
1101 | struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei) | |
1102 | { | |
ff4343da | 1103 | int ret, newentry, num_new_entries; |
5f2aa075 NJ |
1104 | struct exfat_dentry *epmov, *epnew; |
1105 | struct super_block *sb = inode->i_sb; | |
ff4343da YM |
1106 | struct buffer_head *new_bh; |
1107 | struct exfat_entry_set_cache mov_es; | |
5f2aa075 NJ |
1108 | |
1109 | num_new_entries = exfat_calc_num_entries(p_uniname); | |
1110 | if (num_new_entries < 0) | |
1111 | return num_new_entries; | |
1112 | ||
1113 | newentry = exfat_find_empty_entry(inode, p_newdir, num_new_entries); | |
1114 | if (newentry < 0) | |
1115 | return newentry; /* -EIO or -ENOSPC */ | |
1116 | ||
ff4343da YM |
1117 | ret = exfat_get_dentry_set(&mov_es, sb, p_olddir, oldentry, |
1118 | ES_ALL_ENTRIES); | |
1119 | if (ret) | |
5f2aa075 NJ |
1120 | return -EIO; |
1121 | ||
ff4343da YM |
1122 | epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_FILE); |
1123 | epnew = exfat_get_dentry(sb, p_newdir, newentry, &new_bh); | |
1124 | if (!epnew) { | |
1125 | ret = -EIO; | |
1126 | goto put_mov_es; | |
1127 | } | |
1128 | ||
a7a24168 | 1129 | *epnew = *epmov; |
5f2aa075 | 1130 | if (exfat_get_entry_type(epnew) == TYPE_FILE) { |
0ab8ba71 JC |
1131 | epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); |
1132 | ei->attr |= EXFAT_ATTR_ARCHIVE; | |
5f2aa075 | 1133 | } |
2c7f8937 | 1134 | exfat_update_bh(new_bh, IS_DIRSYNC(inode)); |
5f2aa075 NJ |
1135 | brelse(new_bh); |
1136 | ||
ff4343da | 1137 | epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_STREAM); |
c71510b3 | 1138 | epnew = exfat_get_dentry(sb, p_newdir, newentry + 1, &new_bh); |
e8dd3cda | 1139 | if (!epnew) { |
ff4343da YM |
1140 | ret = -EIO; |
1141 | goto put_mov_es; | |
e8dd3cda | 1142 | } |
5f2aa075 | 1143 | |
a7a24168 | 1144 | *epnew = *epmov; |
2c7f8937 | 1145 | exfat_update_bh(new_bh, IS_DIRSYNC(inode)); |
5f2aa075 NJ |
1146 | brelse(new_bh); |
1147 | ||
1148 | ret = exfat_init_ext_entry(inode, p_newdir, newentry, num_new_entries, | |
1149 | p_uniname); | |
1150 | if (ret) | |
1151 | return ret; | |
1152 | ||
ff4343da | 1153 | exfat_remove_entries(inode, &mov_es, ES_IDX_FILE); |
5f2aa075 NJ |
1154 | |
1155 | exfat_chain_set(&ei->dir, p_newdir->dir, p_newdir->size, | |
1156 | p_newdir->flags); | |
1157 | ||
1158 | ei->entry = newentry; | |
ff4343da YM |
1159 | return exfat_put_dentry_set(&mov_es, IS_DIRSYNC(inode)); |
1160 | ||
1161 | put_mov_es: | |
1162 | exfat_put_dentry_set(&mov_es, false); | |
1163 | ||
1164 | return ret; | |
5f2aa075 NJ |
1165 | } |
1166 | ||
5f2aa075 NJ |
1167 | /* rename or move a old file into a new file */ |
1168 | static int __exfat_rename(struct inode *old_parent_inode, | |
1169 | struct exfat_inode_info *ei, struct inode *new_parent_inode, | |
1170 | struct dentry *new_dentry) | |
1171 | { | |
1172 | int ret; | |
1173 | int dentry; | |
1174 | struct exfat_chain olddir, newdir; | |
1175 | struct exfat_chain *p_dir = NULL; | |
1176 | struct exfat_uni_name uni_name; | |
1177 | struct exfat_dentry *ep; | |
1178 | struct super_block *sb = old_parent_inode->i_sb; | |
1179 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
1180 | const unsigned char *new_path = new_dentry->d_name.name; | |
1181 | struct inode *new_inode = new_dentry->d_inode; | |
5f2aa075 NJ |
1182 | struct exfat_inode_info *new_ei = NULL; |
1183 | unsigned int new_entry_type = TYPE_UNUSED; | |
1184 | int new_entry = 0; | |
015c0d4f | 1185 | struct buffer_head *new_bh = NULL; |
5f2aa075 NJ |
1186 | |
1187 | /* check the validity of pointer parameters */ | |
1188 | if (new_path == NULL || strlen(new_path) == 0) | |
1189 | return -EINVAL; | |
1190 | ||
1191 | if (ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 1192 | exfat_err(sb, "abnormal access to deleted source dentry"); |
5f2aa075 NJ |
1193 | return -ENOENT; |
1194 | } | |
1195 | ||
204e6cea SS |
1196 | exfat_chain_set(&olddir, EXFAT_I(old_parent_inode)->start_clu, |
1197 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(old_parent_inode), sbi), | |
1198 | EXFAT_I(old_parent_inode)->flags); | |
5f2aa075 NJ |
1199 | dentry = ei->entry; |
1200 | ||
5f2aa075 NJ |
1201 | /* check whether new dir is existing directory and empty */ |
1202 | if (new_inode) { | |
1203 | ret = -EIO; | |
1204 | new_ei = EXFAT_I(new_inode); | |
1205 | ||
1206 | if (new_ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 1207 | exfat_err(sb, "abnormal access to deleted target dentry"); |
5f2aa075 NJ |
1208 | goto out; |
1209 | } | |
1210 | ||
5f2aa075 NJ |
1211 | p_dir = &(new_ei->dir); |
1212 | new_entry = new_ei->entry; | |
c71510b3 | 1213 | ep = exfat_get_dentry(sb, p_dir, new_entry, &new_bh); |
5f2aa075 NJ |
1214 | if (!ep) |
1215 | goto out; | |
1216 | ||
1217 | new_entry_type = exfat_get_entry_type(ep); | |
1218 | brelse(new_bh); | |
1219 | ||
1220 | /* if new_inode exists, update ei */ | |
1221 | if (new_entry_type == TYPE_DIR) { | |
1222 | struct exfat_chain new_clu; | |
1223 | ||
1224 | new_clu.dir = new_ei->start_clu; | |
1225 | new_clu.size = | |
1226 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(new_inode), | |
1227 | sbi); | |
1228 | new_clu.flags = new_ei->flags; | |
1229 | ||
1230 | ret = exfat_check_dir_empty(sb, &new_clu); | |
1231 | if (ret) | |
1232 | goto out; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | /* check the validity of directory name in the given new pathname */ | |
1237 | ret = exfat_resolve_path(new_parent_inode, new_path, &newdir, | |
1238 | &uni_name); | |
1239 | if (ret) | |
1240 | goto out; | |
1241 | ||
7018ec68 | 1242 | exfat_set_volume_dirty(sb); |
5f2aa075 NJ |
1243 | |
1244 | if (olddir.dir == newdir.dir) | |
1245 | ret = exfat_rename_file(new_parent_inode, &olddir, dentry, | |
1246 | &uni_name, ei); | |
1247 | else | |
1248 | ret = exfat_move_file(new_parent_inode, &olddir, dentry, | |
1249 | &newdir, &uni_name, ei); | |
1250 | ||
1251 | if (!ret && new_inode) { | |
ff4343da YM |
1252 | struct exfat_entry_set_cache es; |
1253 | ||
5f2aa075 | 1254 | /* delete entries of new_dir */ |
ff4343da YM |
1255 | ret = exfat_get_dentry_set(&es, sb, p_dir, new_entry, |
1256 | ES_ALL_ENTRIES); | |
1257 | if (ret) { | |
5f2aa075 NJ |
1258 | ret = -EIO; |
1259 | goto del_out; | |
1260 | } | |
1261 | ||
ff4343da | 1262 | exfat_remove_entries(new_inode, &es, ES_IDX_FILE); |
5f2aa075 | 1263 | |
ff4343da YM |
1264 | ret = exfat_put_dentry_set(&es, IS_DIRSYNC(new_inode)); |
1265 | if (ret) | |
5f2aa075 | 1266 | goto del_out; |
5f2aa075 NJ |
1267 | |
1268 | /* Free the clusters if new_inode is a dir(as if exfat_rmdir) */ | |
dab48b8f YM |
1269 | if (new_entry_type == TYPE_DIR && |
1270 | new_ei->start_clu != EXFAT_EOF_CLUSTER) { | |
5f2aa075 NJ |
1271 | /* new_ei, new_clu_to_free */ |
1272 | struct exfat_chain new_clu_to_free; | |
1273 | ||
1274 | exfat_chain_set(&new_clu_to_free, new_ei->start_clu, | |
1275 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(new_inode), | |
1276 | sbi), new_ei->flags); | |
1277 | ||
1278 | if (exfat_free_cluster(new_inode, &new_clu_to_free)) { | |
1279 | /* just set I/O error only */ | |
1280 | ret = -EIO; | |
1281 | } | |
1282 | ||
1283 | i_size_write(new_inode, 0); | |
11a347fb | 1284 | new_ei->valid_size = 0; |
5f2aa075 NJ |
1285 | new_ei->start_clu = EXFAT_EOF_CLUSTER; |
1286 | new_ei->flags = ALLOC_NO_FAT_CHAIN; | |
1287 | } | |
1288 | del_out: | |
1289 | /* Update new_inode ei | |
1290 | * Prevent syncing removed new_inode | |
1291 | * (new_ei is already initialized above code ("if (new_inode)") | |
1292 | */ | |
1293 | new_ei->dir.dir = DIR_DELETED; | |
1294 | } | |
5f2aa075 NJ |
1295 | out: |
1296 | return ret; | |
1297 | } | |
1298 | ||
e18275ae | 1299 | static int exfat_rename(struct mnt_idmap *idmap, |
549c7297 CB |
1300 | struct inode *old_dir, struct dentry *old_dentry, |
1301 | struct inode *new_dir, struct dentry *new_dentry, | |
1302 | unsigned int flags) | |
5f2aa075 NJ |
1303 | { |
1304 | struct inode *old_inode, *new_inode; | |
1305 | struct super_block *sb = old_dir->i_sb; | |
1306 | loff_t i_pos; | |
1307 | int err; | |
1308 | ||
1309 | /* | |
1310 | * The VFS already checks for existence, so for local filesystems | |
1311 | * the RENAME_NOREPLACE implementation is equivalent to plain rename. | |
1312 | * Don't support any other flags | |
1313 | */ | |
1314 | if (flags & ~RENAME_NOREPLACE) | |
1315 | return -EINVAL; | |
1316 | ||
1317 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
1318 | old_inode = old_dentry->d_inode; | |
1319 | new_inode = new_dentry->d_inode; | |
1320 | ||
1321 | err = __exfat_rename(old_dir, EXFAT_I(old_inode), new_dir, new_dentry); | |
1322 | if (err) | |
1323 | goto unlock; | |
1324 | ||
1325 | inode_inc_iversion(new_dir); | |
d06cdfdd JL |
1326 | simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry); |
1327 | EXFAT_I(new_dir)->i_crtime = current_time(new_dir); | |
4c72a36e | 1328 | exfat_truncate_inode_atime(new_dir); |
5f2aa075 NJ |
1329 | if (IS_DIRSYNC(new_dir)) |
1330 | exfat_sync_inode(new_dir); | |
1331 | else | |
1332 | mark_inode_dirty(new_dir); | |
1333 | ||
1334 | i_pos = ((loff_t)EXFAT_I(old_inode)->dir.dir << 32) | | |
1335 | (EXFAT_I(old_inode)->entry & 0xffffffff); | |
1336 | exfat_unhash_inode(old_inode); | |
1337 | exfat_hash_inode(old_inode, i_pos); | |
1338 | if (IS_DIRSYNC(new_dir)) | |
1339 | exfat_sync_inode(old_inode); | |
1340 | else | |
1341 | mark_inode_dirty(old_inode); | |
1342 | ||
1343 | if (S_ISDIR(old_inode->i_mode) && old_dir != new_dir) { | |
1344 | drop_nlink(old_dir); | |
1345 | if (!new_inode) | |
1346 | inc_nlink(new_dir); | |
1347 | } | |
1348 | ||
1349 | inode_inc_iversion(old_dir); | |
5f2aa075 NJ |
1350 | if (IS_DIRSYNC(old_dir)) |
1351 | exfat_sync_inode(old_dir); | |
1352 | else | |
1353 | mark_inode_dirty(old_dir); | |
1354 | ||
1355 | if (new_inode) { | |
1356 | exfat_unhash_inode(new_inode); | |
1357 | ||
1358 | /* skip drop_nlink if new_inode already has been dropped */ | |
1359 | if (new_inode->i_nlink) { | |
1360 | drop_nlink(new_inode); | |
1361 | if (S_ISDIR(new_inode->i_mode)) | |
1362 | drop_nlink(new_inode); | |
1363 | } else { | |
d1727d55 | 1364 | exfat_warn(sb, "abnormal access to an inode dropped"); |
5f2aa075 NJ |
1365 | WARN_ON(new_inode->i_nlink == 0); |
1366 | } | |
f29f1908 | 1367 | EXFAT_I(new_inode)->i_crtime = current_time(new_inode); |
5f2aa075 NJ |
1368 | } |
1369 | ||
1370 | unlock: | |
1371 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
1372 | return err; | |
1373 | } | |
1374 | ||
1375 | const struct inode_operations exfat_dir_inode_operations = { | |
1376 | .create = exfat_create, | |
1377 | .lookup = exfat_lookup, | |
1378 | .unlink = exfat_unlink, | |
1379 | .mkdir = exfat_mkdir, | |
1380 | .rmdir = exfat_rmdir, | |
1381 | .rename = exfat_rename, | |
1382 | .setattr = exfat_setattr, | |
1383 | .getattr = exfat_getattr, | |
1384 | }; |