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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 | ||
5f2aa075 NJ |
207 | /* search EMPTY CONTINUOUS "num_entries" entries */ |
208 | static int exfat_search_empty_slot(struct super_block *sb, | |
209 | struct exfat_hint_femp *hint_femp, struct exfat_chain *p_dir, | |
af02c72d | 210 | int num_entries, struct exfat_entry_set_cache *es) |
5f2aa075 | 211 | { |
af02c72d | 212 | int i, dentry, ret; |
5f2aa075 | 213 | int dentries_per_clu; |
5f2aa075 | 214 | struct exfat_chain clu; |
5f2aa075 | 215 | struct exfat_sb_info *sbi = EXFAT_SB(sb); |
af02c72d | 216 | int total_entries = EXFAT_CLU_TO_DEN(p_dir->size, sbi); |
5f2aa075 NJ |
217 | |
218 | dentries_per_clu = sbi->dentries_per_clu; | |
219 | ||
220 | if (hint_femp->eidx != EXFAT_HINT_NONE) { | |
221 | dentry = hint_femp->eidx; | |
5f2aa075 | 222 | |
e298c8a8 YM |
223 | /* |
224 | * If hint_femp->count is enough, it is needed to check if | |
225 | * there are actual empty entries. | |
226 | * Otherwise, and if "dentry + hint_famp->count" is also equal | |
227 | * to "p_dir->size * dentries_per_clu", it means ENOSPC. | |
228 | */ | |
af02c72d | 229 | if (dentry + hint_femp->count == total_entries && |
e298c8a8 YM |
230 | num_entries > hint_femp->count) |
231 | return -ENOSPC; | |
232 | ||
233 | hint_femp->eidx = EXFAT_HINT_NONE; | |
5f2aa075 NJ |
234 | exfat_chain_dup(&clu, &hint_femp->cur); |
235 | } else { | |
236 | exfat_chain_dup(&clu, p_dir); | |
237 | dentry = 0; | |
238 | } | |
239 | ||
af02c72d YM |
240 | while (dentry + num_entries < total_entries && |
241 | clu.dir != EXFAT_EOF_CLUSTER) { | |
5f2aa075 NJ |
242 | i = dentry & (dentries_per_clu - 1); |
243 | ||
af02c72d YM |
244 | ret = exfat_get_empty_dentry_set(es, sb, &clu, i, num_entries); |
245 | if (ret < 0) | |
246 | return ret; | |
247 | else if (ret == 0) | |
248 | return dentry; | |
249 | ||
250 | dentry += ret; | |
251 | i += ret; | |
252 | ||
253 | while (i >= dentries_per_clu) { | |
254 | if (clu.flags == ALLOC_NO_FAT_CHAIN) { | |
255 | if (--clu.size > 0) | |
256 | clu.dir++; | |
257 | else | |
258 | clu.dir = EXFAT_EOF_CLUSTER; | |
5f2aa075 | 259 | } else { |
af02c72d | 260 | if (exfat_get_next_cluster(sb, &clu.dir)) |
5f2aa075 | 261 | return -EIO; |
5f2aa075 NJ |
262 | } |
263 | ||
af02c72d | 264 | i -= dentries_per_clu; |
5f2aa075 NJ |
265 | } |
266 | } | |
267 | ||
af02c72d YM |
268 | hint_femp->eidx = dentry; |
269 | hint_femp->count = 0; | |
270 | if (dentry == total_entries || clu.dir == EXFAT_EOF_CLUSTER) | |
e298c8a8 YM |
271 | exfat_chain_set(&hint_femp->cur, EXFAT_EOF_CLUSTER, 0, |
272 | clu.flags); | |
af02c72d YM |
273 | else |
274 | hint_femp->cur = clu; | |
e298c8a8 | 275 | |
5f2aa075 NJ |
276 | return -ENOSPC; |
277 | } | |
278 | ||
279 | static int exfat_check_max_dentries(struct inode *inode) | |
280 | { | |
281 | if (EXFAT_B_TO_DEN(i_size_read(inode)) >= MAX_EXFAT_DENTRIES) { | |
282 | /* | |
9e456aea | 283 | * exFAT spec allows a dir to grow up to 8388608(256MB) |
5f2aa075 NJ |
284 | * dentries |
285 | */ | |
286 | return -ENOSPC; | |
287 | } | |
288 | return 0; | |
289 | } | |
290 | ||
291 | /* find empty directory entry. | |
292 | * if there isn't any empty slot, expand cluster chain. | |
293 | */ | |
294 | static int exfat_find_empty_entry(struct inode *inode, | |
af02c72d YM |
295 | struct exfat_chain *p_dir, int num_entries, |
296 | struct exfat_entry_set_cache *es) | |
5f2aa075 NJ |
297 | { |
298 | int dentry; | |
299 | unsigned int ret, last_clu; | |
5f2aa075 NJ |
300 | loff_t size = 0; |
301 | struct exfat_chain clu; | |
5f2aa075 NJ |
302 | struct super_block *sb = inode->i_sb; |
303 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
304 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
305 | struct exfat_hint_femp hint_femp; | |
306 | ||
307 | hint_femp.eidx = EXFAT_HINT_NONE; | |
308 | ||
309 | if (ei->hint_femp.eidx != EXFAT_HINT_NONE) { | |
a7a24168 | 310 | hint_femp = ei->hint_femp; |
5f2aa075 NJ |
311 | ei->hint_femp.eidx = EXFAT_HINT_NONE; |
312 | } | |
313 | ||
314 | while ((dentry = exfat_search_empty_slot(sb, &hint_femp, p_dir, | |
af02c72d | 315 | num_entries, es)) < 0) { |
5f2aa075 NJ |
316 | if (dentry == -EIO) |
317 | break; | |
318 | ||
319 | if (exfat_check_max_dentries(inode)) | |
320 | return -ENOSPC; | |
321 | ||
5f2aa075 NJ |
322 | /* |
323 | * Allocate new cluster to this directory | |
324 | */ | |
dab48b8f YM |
325 | if (ei->start_clu != EXFAT_EOF_CLUSTER) { |
326 | /* we trust p_dir->size regardless of FAT type */ | |
327 | if (exfat_find_last_cluster(sb, p_dir, &last_clu)) | |
328 | return -EIO; | |
329 | ||
330 | exfat_chain_set(&clu, last_clu + 1, 0, p_dir->flags); | |
331 | } else { | |
332 | /* This directory is empty */ | |
333 | exfat_chain_set(&clu, EXFAT_EOF_CLUSTER, 0, | |
334 | ALLOC_NO_FAT_CHAIN); | |
335 | } | |
5f2aa075 NJ |
336 | |
337 | /* allocate a cluster */ | |
23befe49 | 338 | ret = exfat_alloc_cluster(inode, 1, &clu, IS_DIRSYNC(inode)); |
5f2aa075 NJ |
339 | if (ret) |
340 | return ret; | |
341 | ||
342 | if (exfat_zeroed_cluster(inode, clu.dir)) | |
343 | return -EIO; | |
344 | ||
dab48b8f YM |
345 | if (ei->start_clu == EXFAT_EOF_CLUSTER) { |
346 | ei->start_clu = clu.dir; | |
347 | p_dir->dir = clu.dir; | |
348 | } | |
349 | ||
5f2aa075 NJ |
350 | /* append to the FAT chain */ |
351 | if (clu.flags != p_dir->flags) { | |
352 | /* no-fat-chain bit is disabled, | |
353 | * so fat-chain should be synced with alloc-bitmap | |
354 | */ | |
355 | exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size); | |
356 | p_dir->flags = ALLOC_FAT_CHAIN; | |
357 | hint_femp.cur.flags = ALLOC_FAT_CHAIN; | |
358 | } | |
359 | ||
360 | if (clu.flags == ALLOC_FAT_CHAIN) | |
361 | if (exfat_ent_set(sb, last_clu, clu.dir)) | |
362 | return -EIO; | |
363 | ||
e298c8a8 | 364 | if (hint_femp.cur.dir == EXFAT_EOF_CLUSTER) |
5f2aa075 | 365 | exfat_chain_set(&hint_femp.cur, clu.dir, 0, clu.flags); |
e298c8a8 YM |
366 | |
367 | hint_femp.count += sbi->dentries_per_clu; | |
368 | ||
5f2aa075 NJ |
369 | hint_femp.cur.size++; |
370 | p_dir->size++; | |
371 | size = EXFAT_CLU_TO_B(p_dir->size, sbi); | |
372 | ||
5f2aa075 NJ |
373 | /* directory inode should be updated in here */ |
374 | i_size_write(inode, size); | |
7dee6f57 CVB |
375 | ei->i_size_ondisk += sbi->cluster_size; |
376 | ei->i_size_aligned += sbi->cluster_size; | |
11a347fb | 377 | ei->valid_size += sbi->cluster_size; |
7dee6f57 | 378 | ei->flags = p_dir->flags; |
39c1ce8e | 379 | inode->i_blocks += sbi->cluster_size >> 9; |
5f2aa075 NJ |
380 | } |
381 | ||
382 | return dentry; | |
383 | } | |
384 | ||
385 | /* | |
386 | * Name Resolution Functions : | |
387 | * Zero if it was successful; otherwise nonzero. | |
388 | */ | |
389 | static int __exfat_resolve_path(struct inode *inode, const unsigned char *path, | |
390 | struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname, | |
391 | int lookup) | |
392 | { | |
393 | int namelen; | |
394 | int lossy = NLS_NAME_NO_LOSSY; | |
395 | struct super_block *sb = inode->i_sb; | |
396 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
397 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
9ec784bf | 398 | int pathlen = strlen(path); |
5f2aa075 | 399 | |
9ec784bf VK |
400 | /* |
401 | * get the length of the pathname excluding | |
402 | * trailing periods, if any. | |
403 | */ | |
404 | namelen = exfat_striptail_len(pathlen, path, false); | |
405 | if (EXFAT_SB(sb)->options.keep_last_dots) { | |
406 | /* | |
407 | * Do not allow the creation of files with names | |
408 | * ending with period(s). | |
409 | */ | |
410 | if (!lookup && (namelen < pathlen)) | |
411 | return -EINVAL; | |
412 | namelen = pathlen; | |
413 | } | |
5f2aa075 NJ |
414 | if (!namelen) |
415 | return -ENOENT; | |
9ec784bf | 416 | if (pathlen > (MAX_NAME_LENGTH * MAX_CHARSET_SIZE)) |
5f2aa075 NJ |
417 | return -ENAMETOOLONG; |
418 | ||
419 | /* | |
420 | * strip all leading spaces : | |
421 | * "MS windows 7" supports leading spaces. | |
422 | * So we should skip this preprocessing for compatibility. | |
423 | */ | |
424 | ||
425 | /* file name conversion : | |
426 | * If lookup case, we allow bad-name for compatibility. | |
427 | */ | |
428 | namelen = exfat_nls_to_utf16(sb, path, namelen, p_uniname, | |
429 | &lossy); | |
430 | if (namelen < 0) | |
431 | return namelen; /* return error value */ | |
432 | ||
433 | if ((lossy && !lookup) || !namelen) | |
86da53e8 | 434 | return (lossy & NLS_NAME_OVERLEN) ? -ENAMETOOLONG : -EINVAL; |
5f2aa075 NJ |
435 | |
436 | exfat_chain_set(p_dir, ei->start_clu, | |
437 | EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags); | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
442 | static inline int exfat_resolve_path(struct inode *inode, | |
443 | const unsigned char *path, struct exfat_chain *dir, | |
444 | struct exfat_uni_name *uni) | |
445 | { | |
446 | return __exfat_resolve_path(inode, path, dir, uni, 0); | |
447 | } | |
448 | ||
449 | static inline int exfat_resolve_path_for_lookup(struct inode *inode, | |
450 | const unsigned char *path, struct exfat_chain *dir, | |
451 | struct exfat_uni_name *uni) | |
452 | { | |
453 | return __exfat_resolve_path(inode, path, dir, uni, 1); | |
454 | } | |
455 | ||
456 | static inline loff_t exfat_make_i_pos(struct exfat_dir_entry *info) | |
457 | { | |
458 | return ((loff_t) info->dir.dir << 32) | (info->entry & 0xffffffff); | |
459 | } | |
460 | ||
461 | static int exfat_add_entry(struct inode *inode, const char *path, | |
462 | struct exfat_chain *p_dir, unsigned int type, | |
463 | struct exfat_dir_entry *info) | |
464 | { | |
465 | int ret, dentry, num_entries; | |
466 | struct super_block *sb = inode->i_sb; | |
467 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
468 | struct exfat_uni_name uniname; | |
469 | struct exfat_chain clu; | |
cf8663fa YM |
470 | struct timespec64 ts = current_time(inode); |
471 | struct exfat_entry_set_cache es; | |
5f2aa075 NJ |
472 | int clu_size = 0; |
473 | unsigned int start_clu = EXFAT_FREE_CLUSTER; | |
474 | ||
475 | ret = exfat_resolve_path(inode, path, p_dir, &uniname); | |
476 | if (ret) | |
477 | goto out; | |
478 | ||
479 | num_entries = exfat_calc_num_entries(&uniname); | |
480 | if (num_entries < 0) { | |
481 | ret = num_entries; | |
482 | goto out; | |
483 | } | |
484 | ||
485 | /* exfat_find_empty_entry must be called before alloc_cluster() */ | |
af02c72d | 486 | dentry = exfat_find_empty_entry(inode, p_dir, num_entries, &es); |
5f2aa075 NJ |
487 | if (dentry < 0) { |
488 | ret = dentry; /* -EIO or -ENOSPC */ | |
489 | goto out; | |
490 | } | |
491 | ||
ee785c15 | 492 | if (type == TYPE_DIR && !sbi->options.zero_size_dir) { |
5f2aa075 | 493 | ret = exfat_alloc_new_dir(inode, &clu); |
af02c72d YM |
494 | if (ret) { |
495 | exfat_put_dentry_set(&es, false); | |
5f2aa075 | 496 | goto out; |
af02c72d | 497 | } |
5f2aa075 NJ |
498 | start_clu = clu.dir; |
499 | clu_size = sbi->cluster_size; | |
500 | } | |
501 | ||
502 | /* update the directory entry */ | |
503 | /* fill the dos name directory entry information of the created file. | |
504 | * the first cluster is not determined yet. (0) | |
505 | */ | |
cf8663fa | 506 | exfat_init_dir_entry(&es, type, start_clu, clu_size, &ts); |
d97e0606 | 507 | exfat_init_ext_entry(&es, num_entries, &uniname); |
cf8663fa YM |
508 | |
509 | ret = exfat_put_dentry_set(&es, IS_DIRSYNC(inode)); | |
5f2aa075 NJ |
510 | if (ret) |
511 | goto out; | |
512 | ||
a7a24168 | 513 | info->dir = *p_dir; |
5f2aa075 NJ |
514 | info->entry = dentry; |
515 | info->flags = ALLOC_NO_FAT_CHAIN; | |
516 | info->type = type; | |
517 | ||
518 | if (type == TYPE_FILE) { | |
0ab8ba71 | 519 | info->attr = EXFAT_ATTR_ARCHIVE; |
5f2aa075 NJ |
520 | info->start_clu = EXFAT_EOF_CLUSTER; |
521 | info->size = 0; | |
522 | info->num_subdirs = 0; | |
523 | } else { | |
0ab8ba71 | 524 | info->attr = EXFAT_ATTR_SUBDIR; |
ee785c15 YM |
525 | if (sbi->options.zero_size_dir) |
526 | info->start_clu = EXFAT_EOF_CLUSTER; | |
527 | else | |
528 | info->start_clu = start_clu; | |
5f2aa075 | 529 | info->size = clu_size; |
6c958a09 | 530 | info->num_subdirs = EXFAT_MIN_SUBDIR; |
5f2aa075 | 531 | } |
11a347fb YM |
532 | info->valid_size = info->size; |
533 | ||
5f2aa075 NJ |
534 | memset(&info->crtime, 0, sizeof(info->crtime)); |
535 | memset(&info->mtime, 0, sizeof(info->mtime)); | |
536 | memset(&info->atime, 0, sizeof(info->atime)); | |
537 | out: | |
538 | return ret; | |
539 | } | |
540 | ||
6c960e68 | 541 | static int exfat_create(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 542 | struct dentry *dentry, umode_t mode, bool excl) |
5f2aa075 NJ |
543 | { |
544 | struct super_block *sb = dir->i_sb; | |
545 | struct inode *inode; | |
546 | struct exfat_chain cdir; | |
547 | struct exfat_dir_entry info; | |
548 | loff_t i_pos; | |
549 | int err; | |
96cf51ac | 550 | loff_t size = i_size_read(dir); |
5f2aa075 NJ |
551 | |
552 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
7018ec68 | 553 | exfat_set_volume_dirty(sb); |
5f2aa075 NJ |
554 | err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_FILE, |
555 | &info); | |
5f2aa075 NJ |
556 | if (err) |
557 | goto unlock; | |
558 | ||
559 | inode_inc_iversion(dir); | |
4c72a36e | 560 | inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); |
96cf51ac | 561 | if (IS_DIRSYNC(dir) && size != i_size_read(dir)) |
5f2aa075 NJ |
562 | exfat_sync_inode(dir); |
563 | else | |
564 | mark_inode_dirty(dir); | |
565 | ||
566 | i_pos = exfat_make_i_pos(&info); | |
567 | inode = exfat_build_inode(sb, &info, i_pos); | |
d6c9efd9 TK |
568 | err = PTR_ERR_OR_ZERO(inode); |
569 | if (err) | |
5f2aa075 NJ |
570 | goto unlock; |
571 | ||
572 | inode_inc_iversion(inode); | |
4c72a36e JL |
573 | EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode); |
574 | exfat_truncate_inode_atime(inode); | |
575 | ||
5f2aa075 NJ |
576 | /* timestamp is already written, so mark_inode_dirty() is unneeded. */ |
577 | ||
578 | d_instantiate(dentry, inode); | |
579 | unlock: | |
580 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
581 | return err; | |
582 | } | |
583 | ||
584 | /* lookup a file */ | |
585 | static int exfat_find(struct inode *dir, struct qstr *qname, | |
586 | struct exfat_dir_entry *info) | |
587 | { | |
72880cb5 | 588 | int ret, dentry, count; |
5f2aa075 NJ |
589 | struct exfat_chain cdir; |
590 | struct exfat_uni_name uni_name; | |
5f2aa075 NJ |
591 | struct super_block *sb = dir->i_sb; |
592 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
593 | struct exfat_inode_info *ei = EXFAT_I(dir); | |
188df41f | 594 | struct exfat_dentry *ep, *ep2; |
20914ff6 | 595 | struct exfat_entry_set_cache es; |
c6e2f52e HK |
596 | /* for optimized dir & entry to prevent long traverse of cluster chain */ |
597 | struct exfat_hint hint_opt; | |
5f2aa075 NJ |
598 | |
599 | if (qname->len == 0) | |
600 | return -ENOENT; | |
601 | ||
602 | /* check the validity of directory name in the given pathname */ | |
603 | ret = exfat_resolve_path_for_lookup(dir, qname->name, &cdir, &uni_name); | |
604 | if (ret) | |
605 | return ret; | |
606 | ||
5f2aa075 NJ |
607 | /* check the validation of hint_stat and initialize it if required */ |
608 | if (ei->version != (inode_peek_iversion_raw(dir) & 0xffffffff)) { | |
609 | ei->hint_stat.clu = cdir.dir; | |
610 | ei->hint_stat.eidx = 0; | |
611 | ei->version = (inode_peek_iversion_raw(dir) & 0xffffffff); | |
612 | ei->hint_femp.eidx = EXFAT_HINT_NONE; | |
613 | } | |
614 | ||
615 | /* search the file name for directories */ | |
72880cb5 | 616 | dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name, &hint_opt); |
188df41f | 617 | if (dentry < 0) |
5f2aa075 NJ |
618 | return dentry; /* -error value */ |
619 | ||
a7a24168 | 620 | info->dir = cdir; |
5f2aa075 NJ |
621 | info->entry = dentry; |
622 | info->num_subdirs = 0; | |
623 | ||
c6e2f52e HK |
624 | /* adjust cdir to the optimized value */ |
625 | cdir.dir = hint_opt.clu; | |
626 | if (cdir.flags & ALLOC_NO_FAT_CHAIN) | |
627 | cdir.size -= dentry / sbi->dentries_per_clu; | |
628 | dentry = hint_opt.eidx; | |
20914ff6 | 629 | if (exfat_get_dentry_set(&es, sb, &cdir, dentry, ES_2_ENTRIES)) |
188df41f | 630 | return -EIO; |
f3fe3954 YM |
631 | ep = exfat_get_dentry_cached(&es, ES_IDX_FILE); |
632 | ep2 = exfat_get_dentry_cached(&es, ES_IDX_STREAM); | |
188df41f TK |
633 | |
634 | info->type = exfat_get_entry_type(ep); | |
635 | info->attr = le16_to_cpu(ep->dentry.file.attr); | |
636 | info->size = le64_to_cpu(ep2->dentry.stream.valid_size); | |
11a347fb YM |
637 | info->valid_size = le64_to_cpu(ep2->dentry.stream.valid_size); |
638 | info->size = le64_to_cpu(ep2->dentry.stream.size); | |
dab48b8f | 639 | if (info->size == 0) { |
188df41f TK |
640 | info->flags = ALLOC_NO_FAT_CHAIN; |
641 | info->start_clu = EXFAT_EOF_CLUSTER; | |
642 | } else { | |
643 | info->flags = ep2->dentry.stream.flags; | |
644 | info->start_clu = | |
645 | le32_to_cpu(ep2->dentry.stream.start_clu); | |
646 | } | |
5f2aa075 | 647 | |
188df41f TK |
648 | exfat_get_entry_time(sbi, &info->crtime, |
649 | ep->dentry.file.create_tz, | |
650 | ep->dentry.file.create_time, | |
651 | ep->dentry.file.create_date, | |
652 | ep->dentry.file.create_time_cs); | |
653 | exfat_get_entry_time(sbi, &info->mtime, | |
654 | ep->dentry.file.modify_tz, | |
655 | ep->dentry.file.modify_time, | |
656 | ep->dentry.file.modify_date, | |
657 | ep->dentry.file.modify_time_cs); | |
658 | exfat_get_entry_time(sbi, &info->atime, | |
659 | ep->dentry.file.access_tz, | |
660 | ep->dentry.file.access_time, | |
661 | ep->dentry.file.access_date, | |
662 | 0); | |
3b9681ac | 663 | exfat_put_dentry_set(&es, false); |
188df41f TK |
664 | |
665 | if (ei->start_clu == EXFAT_FREE_CLUSTER) { | |
666 | exfat_fs_error(sb, | |
667 | "non-zero size file starts with zero cluster (size : %llu, p_dir : %u, entry : 0x%08x)", | |
668 | i_size_read(dir), ei->dir.dir, ei->entry); | |
669 | return -EIO; | |
670 | } | |
5f2aa075 | 671 | |
188df41f TK |
672 | if (info->type == TYPE_DIR) { |
673 | exfat_chain_set(&cdir, info->start_clu, | |
674 | EXFAT_B_TO_CLU(info->size, sbi), info->flags); | |
5f2aa075 NJ |
675 | count = exfat_count_dir_entries(sb, &cdir); |
676 | if (count < 0) | |
677 | return -EIO; | |
678 | ||
188df41f | 679 | info->num_subdirs = count + EXFAT_MIN_SUBDIR; |
5f2aa075 NJ |
680 | } |
681 | return 0; | |
682 | } | |
683 | ||
684 | static int exfat_d_anon_disconn(struct dentry *dentry) | |
685 | { | |
686 | return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED); | |
687 | } | |
688 | ||
689 | static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry, | |
690 | unsigned int flags) | |
691 | { | |
692 | struct super_block *sb = dir->i_sb; | |
693 | struct inode *inode; | |
694 | struct dentry *alias; | |
695 | struct exfat_dir_entry info; | |
696 | int err; | |
697 | loff_t i_pos; | |
698 | mode_t i_mode; | |
699 | ||
700 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
701 | err = exfat_find(dir, &dentry->d_name, &info); | |
702 | if (err) { | |
703 | if (err == -ENOENT) { | |
704 | inode = NULL; | |
705 | goto out; | |
706 | } | |
707 | goto unlock; | |
708 | } | |
709 | ||
710 | i_pos = exfat_make_i_pos(&info); | |
711 | inode = exfat_build_inode(sb, &info, i_pos); | |
d6c9efd9 TK |
712 | err = PTR_ERR_OR_ZERO(inode); |
713 | if (err) | |
5f2aa075 | 714 | goto unlock; |
5f2aa075 NJ |
715 | |
716 | i_mode = inode->i_mode; | |
717 | alias = d_find_alias(inode); | |
718 | ||
719 | /* | |
720 | * Checking "alias->d_parent == dentry->d_parent" to make sure | |
721 | * FS is not corrupted (especially double linked dir). | |
722 | */ | |
723 | if (alias && alias->d_parent == dentry->d_parent && | |
724 | !exfat_d_anon_disconn(alias)) { | |
725 | ||
726 | /* | |
727 | * Unhashed alias is able to exist because of revalidate() | |
728 | * called by lookup_fast. You can easily make this status | |
729 | * by calling create and lookup concurrently | |
730 | * In such case, we reuse an alias instead of new dentry | |
731 | */ | |
732 | if (d_unhashed(alias)) { | |
733 | WARN_ON(alias->d_name.hash_len != | |
734 | dentry->d_name.hash_len); | |
d1727d55 JP |
735 | exfat_info(sb, "rehashed a dentry(%p) in read lookup", |
736 | alias); | |
5f2aa075 NJ |
737 | d_drop(dentry); |
738 | d_rehash(alias); | |
739 | } else if (!S_ISDIR(i_mode)) { | |
740 | /* | |
741 | * This inode has non anonymous-DCACHE_DISCONNECTED | |
742 | * dentry. This means, the user did ->lookup() by an | |
743 | * another name (longname vs 8.3 alias of it) in past. | |
744 | * | |
745 | * Switch to new one for reason of locality if possible. | |
746 | */ | |
747 | d_move(alias, dentry); | |
748 | } | |
749 | iput(inode); | |
750 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
751 | return alias; | |
752 | } | |
753 | dput(alias); | |
754 | out: | |
755 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
756 | if (!inode) | |
757 | exfat_d_version_set(dentry, inode_query_iversion(dir)); | |
758 | ||
759 | return d_splice_alias(inode, dentry); | |
760 | unlock: | |
761 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
762 | return ERR_PTR(err); | |
763 | } | |
764 | ||
765 | /* remove an entry, BUT don't truncate */ | |
766 | static int exfat_unlink(struct inode *dir, struct dentry *dentry) | |
767 | { | |
768 | struct exfat_chain cdir; | |
5f2aa075 NJ |
769 | struct super_block *sb = dir->i_sb; |
770 | struct inode *inode = dentry->d_inode; | |
771 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
ff4343da YM |
772 | struct exfat_entry_set_cache es; |
773 | int entry, err = 0; | |
5f2aa075 NJ |
774 | |
775 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
776 | exfat_chain_dup(&cdir, &ei->dir); | |
777 | entry = ei->entry; | |
778 | if (ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 779 | exfat_err(sb, "abnormal access to deleted dentry"); |
5f2aa075 NJ |
780 | err = -ENOENT; |
781 | goto unlock; | |
782 | } | |
783 | ||
ff4343da YM |
784 | err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES); |
785 | if (err) { | |
5f2aa075 | 786 | err = -EIO; |
5f2aa075 NJ |
787 | goto unlock; |
788 | } | |
5f2aa075 | 789 | |
7018ec68 | 790 | exfat_set_volume_dirty(sb); |
ff4343da | 791 | |
5f2aa075 | 792 | /* update the directory entry */ |
ff4343da YM |
793 | exfat_remove_entries(inode, &es, ES_IDX_FILE); |
794 | ||
795 | err = exfat_put_dentry_set(&es, IS_DIRSYNC(inode)); | |
796 | if (err) | |
5f2aa075 | 797 | goto unlock; |
5f2aa075 NJ |
798 | |
799 | /* This doesn't modify ei */ | |
800 | ei->dir.dir = DIR_DELETED; | |
5f2aa075 NJ |
801 | |
802 | inode_inc_iversion(dir); | |
4c72a36e JL |
803 | simple_inode_init_ts(dir); |
804 | exfat_truncate_inode_atime(dir); | |
96cf51ac | 805 | mark_inode_dirty(dir); |
5f2aa075 NJ |
806 | |
807 | clear_nlink(inode); | |
4c72a36e JL |
808 | simple_inode_init_ts(inode); |
809 | exfat_truncate_inode_atime(inode); | |
5f2aa075 NJ |
810 | exfat_unhash_inode(inode); |
811 | exfat_d_version_set(dentry, inode_query_iversion(dir)); | |
812 | unlock: | |
813 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
814 | return err; | |
815 | } | |
816 | ||
c54bd91e | 817 | static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 818 | struct dentry *dentry, umode_t mode) |
5f2aa075 NJ |
819 | { |
820 | struct super_block *sb = dir->i_sb; | |
821 | struct inode *inode; | |
822 | struct exfat_dir_entry info; | |
823 | struct exfat_chain cdir; | |
824 | loff_t i_pos; | |
825 | int err; | |
96cf51ac | 826 | loff_t size = i_size_read(dir); |
5f2aa075 NJ |
827 | |
828 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
7018ec68 | 829 | exfat_set_volume_dirty(sb); |
5f2aa075 NJ |
830 | err = exfat_add_entry(dir, dentry->d_name.name, &cdir, TYPE_DIR, |
831 | &info); | |
5f2aa075 NJ |
832 | if (err) |
833 | goto unlock; | |
834 | ||
835 | inode_inc_iversion(dir); | |
4c72a36e | 836 | inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); |
96cf51ac | 837 | if (IS_DIRSYNC(dir) && size != i_size_read(dir)) |
5f2aa075 NJ |
838 | exfat_sync_inode(dir); |
839 | else | |
840 | mark_inode_dirty(dir); | |
841 | inc_nlink(dir); | |
842 | ||
843 | i_pos = exfat_make_i_pos(&info); | |
844 | inode = exfat_build_inode(sb, &info, i_pos); | |
d6c9efd9 TK |
845 | err = PTR_ERR_OR_ZERO(inode); |
846 | if (err) | |
5f2aa075 | 847 | goto unlock; |
5f2aa075 NJ |
848 | |
849 | inode_inc_iversion(inode); | |
4c72a36e JL |
850 | EXFAT_I(inode)->i_crtime = simple_inode_init_ts(inode); |
851 | exfat_truncate_inode_atime(inode); | |
5f2aa075 NJ |
852 | /* timestamp is already written, so mark_inode_dirty() is unneeded. */ |
853 | ||
854 | d_instantiate(dentry, inode); | |
855 | ||
856 | unlock: | |
857 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
858 | return err; | |
859 | } | |
860 | ||
861 | static int exfat_check_dir_empty(struct super_block *sb, | |
862 | struct exfat_chain *p_dir) | |
863 | { | |
864 | int i, dentries_per_clu; | |
865 | unsigned int type; | |
866 | struct exfat_chain clu; | |
867 | struct exfat_dentry *ep; | |
868 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
869 | struct buffer_head *bh; | |
870 | ||
871 | dentries_per_clu = sbi->dentries_per_clu; | |
872 | ||
dab48b8f YM |
873 | if (p_dir->dir == EXFAT_EOF_CLUSTER) |
874 | return 0; | |
875 | ||
5f2aa075 NJ |
876 | exfat_chain_dup(&clu, p_dir); |
877 | ||
878 | while (clu.dir != EXFAT_EOF_CLUSTER) { | |
879 | for (i = 0; i < dentries_per_clu; i++) { | |
c71510b3 | 880 | ep = exfat_get_dentry(sb, &clu, i, &bh); |
5f2aa075 NJ |
881 | if (!ep) |
882 | return -EIO; | |
883 | type = exfat_get_entry_type(ep); | |
884 | brelse(bh); | |
885 | if (type == TYPE_UNUSED) | |
886 | return 0; | |
887 | ||
888 | if (type != TYPE_FILE && type != TYPE_DIR) | |
889 | continue; | |
890 | ||
891 | return -ENOTEMPTY; | |
892 | } | |
893 | ||
894 | if (clu.flags == ALLOC_NO_FAT_CHAIN) { | |
895 | if (--clu.size > 0) | |
896 | clu.dir++; | |
897 | else | |
898 | clu.dir = EXFAT_EOF_CLUSTER; | |
899 | } else { | |
900 | if (exfat_get_next_cluster(sb, &(clu.dir))) | |
901 | return -EIO; | |
902 | } | |
903 | } | |
904 | ||
905 | return 0; | |
906 | } | |
907 | ||
908 | static int exfat_rmdir(struct inode *dir, struct dentry *dentry) | |
909 | { | |
910 | struct inode *inode = dentry->d_inode; | |
5f2aa075 NJ |
911 | struct exfat_chain cdir, clu_to_free; |
912 | struct super_block *sb = inode->i_sb; | |
913 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
914 | struct exfat_inode_info *ei = EXFAT_I(inode); | |
ff4343da YM |
915 | struct exfat_entry_set_cache es; |
916 | int entry, err; | |
5f2aa075 NJ |
917 | |
918 | mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock); | |
919 | ||
920 | exfat_chain_dup(&cdir, &ei->dir); | |
921 | entry = ei->entry; | |
922 | ||
923 | if (ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 924 | exfat_err(sb, "abnormal access to deleted dentry"); |
5f2aa075 NJ |
925 | err = -ENOENT; |
926 | goto unlock; | |
927 | } | |
928 | ||
5f2aa075 NJ |
929 | exfat_chain_set(&clu_to_free, ei->start_clu, |
930 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(inode), sbi), ei->flags); | |
931 | ||
932 | err = exfat_check_dir_empty(sb, &clu_to_free); | |
933 | if (err) { | |
934 | if (err == -EIO) | |
d1727d55 JP |
935 | exfat_err(sb, "failed to exfat_check_dir_empty : err(%d)", |
936 | err); | |
5f2aa075 NJ |
937 | goto unlock; |
938 | } | |
939 | ||
ff4343da YM |
940 | err = exfat_get_dentry_set(&es, sb, &cdir, entry, ES_ALL_ENTRIES); |
941 | if (err) { | |
5f2aa075 | 942 | err = -EIO; |
5f2aa075 NJ |
943 | goto unlock; |
944 | } | |
5f2aa075 | 945 | |
7018ec68 | 946 | exfat_set_volume_dirty(sb); |
ff4343da YM |
947 | |
948 | exfat_remove_entries(inode, &es, ES_IDX_FILE); | |
949 | ||
950 | err = exfat_put_dentry_set(&es, IS_DIRSYNC(dir)); | |
951 | if (err) | |
5f2aa075 | 952 | goto unlock; |
ff4343da | 953 | |
5f2aa075 | 954 | ei->dir.dir = DIR_DELETED; |
5f2aa075 NJ |
955 | |
956 | inode_inc_iversion(dir); | |
4c72a36e JL |
957 | simple_inode_init_ts(dir); |
958 | exfat_truncate_inode_atime(dir); | |
5f2aa075 NJ |
959 | if (IS_DIRSYNC(dir)) |
960 | exfat_sync_inode(dir); | |
961 | else | |
962 | mark_inode_dirty(dir); | |
963 | drop_nlink(dir); | |
964 | ||
965 | clear_nlink(inode); | |
4c72a36e JL |
966 | simple_inode_init_ts(inode); |
967 | exfat_truncate_inode_atime(inode); | |
5f2aa075 NJ |
968 | exfat_unhash_inode(inode); |
969 | exfat_d_version_set(dentry, inode_query_iversion(dir)); | |
970 | unlock: | |
971 | mutex_unlock(&EXFAT_SB(inode->i_sb)->s_lock); | |
972 | return err; | |
973 | } | |
974 | ||
975 | static int exfat_rename_file(struct inode *inode, struct exfat_chain *p_dir, | |
976 | int oldentry, struct exfat_uni_name *p_uniname, | |
977 | struct exfat_inode_info *ei) | |
978 | { | |
ff4343da | 979 | int ret, num_new_entries; |
5f2aa075 NJ |
980 | struct exfat_dentry *epold, *epnew; |
981 | struct super_block *sb = inode->i_sb; | |
d97e0606 | 982 | struct exfat_entry_set_cache old_es, new_es; |
5f2aa075 NJ |
983 | int sync = IS_DIRSYNC(inode); |
984 | ||
5f2aa075 NJ |
985 | num_new_entries = exfat_calc_num_entries(p_uniname); |
986 | if (num_new_entries < 0) | |
987 | return num_new_entries; | |
988 | ||
ff4343da YM |
989 | ret = exfat_get_dentry_set(&old_es, sb, p_dir, oldentry, ES_ALL_ENTRIES); |
990 | if (ret) { | |
991 | ret = -EIO; | |
992 | return ret; | |
993 | } | |
994 | ||
995 | epold = exfat_get_dentry_cached(&old_es, ES_IDX_FILE); | |
996 | ||
997 | if (old_es.num_entries < num_new_entries) { | |
5f2aa075 NJ |
998 | int newentry; |
999 | ||
af02c72d YM |
1000 | newentry = exfat_find_empty_entry(inode, p_dir, num_new_entries, |
1001 | &new_es); | |
ff4343da YM |
1002 | if (newentry < 0) { |
1003 | ret = newentry; /* -EIO or -ENOSPC */ | |
1004 | goto put_old_es; | |
1005 | } | |
5f2aa075 | 1006 | |
d97e0606 | 1007 | epnew = exfat_get_dentry_cached(&new_es, ES_IDX_FILE); |
a7a24168 | 1008 | *epnew = *epold; |
5f2aa075 | 1009 | if (exfat_get_entry_type(epnew) == TYPE_FILE) { |
0ab8ba71 JC |
1010 | epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); |
1011 | ei->attr |= EXFAT_ATTR_ARCHIVE; | |
5f2aa075 | 1012 | } |
5f2aa075 | 1013 | |
ff4343da | 1014 | epold = exfat_get_dentry_cached(&old_es, ES_IDX_STREAM); |
d97e0606 | 1015 | epnew = exfat_get_dentry_cached(&new_es, ES_IDX_STREAM); |
a7a24168 | 1016 | *epnew = *epold; |
5f2aa075 | 1017 | |
d97e0606 YM |
1018 | exfat_init_ext_entry(&new_es, num_new_entries, p_uniname); |
1019 | ||
1020 | ret = exfat_put_dentry_set(&new_es, sync); | |
5f2aa075 | 1021 | if (ret) |
ff4343da | 1022 | goto put_old_es; |
5f2aa075 | 1023 | |
ff4343da | 1024 | exfat_remove_entries(inode, &old_es, ES_IDX_FILE); |
d8dad258 | 1025 | ei->dir = *p_dir; |
5f2aa075 NJ |
1026 | ei->entry = newentry; |
1027 | } else { | |
1028 | if (exfat_get_entry_type(epold) == TYPE_FILE) { | |
0ab8ba71 JC |
1029 | epold->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); |
1030 | ei->attr |= EXFAT_ATTR_ARCHIVE; | |
5f2aa075 | 1031 | } |
4e1aa22f YM |
1032 | |
1033 | exfat_remove_entries(inode, &old_es, ES_IDX_FIRST_FILENAME + 1); | |
d97e0606 | 1034 | exfat_init_ext_entry(&old_es, num_new_entries, p_uniname); |
5f2aa075 | 1035 | } |
ff4343da YM |
1036 | return exfat_put_dentry_set(&old_es, sync); |
1037 | ||
1038 | put_old_es: | |
1039 | exfat_put_dentry_set(&old_es, false); | |
1040 | return ret; | |
5f2aa075 NJ |
1041 | } |
1042 | ||
1043 | static int exfat_move_file(struct inode *inode, struct exfat_chain *p_olddir, | |
1044 | int oldentry, struct exfat_chain *p_newdir, | |
1045 | struct exfat_uni_name *p_uniname, struct exfat_inode_info *ei) | |
1046 | { | |
ff4343da | 1047 | int ret, newentry, num_new_entries; |
5f2aa075 NJ |
1048 | struct exfat_dentry *epmov, *epnew; |
1049 | struct super_block *sb = inode->i_sb; | |
d97e0606 | 1050 | struct exfat_entry_set_cache mov_es, new_es; |
5f2aa075 NJ |
1051 | |
1052 | num_new_entries = exfat_calc_num_entries(p_uniname); | |
1053 | if (num_new_entries < 0) | |
1054 | return num_new_entries; | |
1055 | ||
ff4343da YM |
1056 | ret = exfat_get_dentry_set(&mov_es, sb, p_olddir, oldentry, |
1057 | ES_ALL_ENTRIES); | |
1058 | if (ret) | |
5f2aa075 NJ |
1059 | return -EIO; |
1060 | ||
af02c72d YM |
1061 | newentry = exfat_find_empty_entry(inode, p_newdir, num_new_entries, |
1062 | &new_es); | |
1063 | if (newentry < 0) { | |
1064 | ret = newentry; /* -EIO or -ENOSPC */ | |
ff4343da | 1065 | goto put_mov_es; |
af02c72d | 1066 | } |
ff4343da | 1067 | |
d97e0606 YM |
1068 | epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_FILE); |
1069 | epnew = exfat_get_dentry_cached(&new_es, ES_IDX_FILE); | |
a7a24168 | 1070 | *epnew = *epmov; |
5f2aa075 | 1071 | if (exfat_get_entry_type(epnew) == TYPE_FILE) { |
0ab8ba71 JC |
1072 | epnew->dentry.file.attr |= cpu_to_le16(EXFAT_ATTR_ARCHIVE); |
1073 | ei->attr |= EXFAT_ATTR_ARCHIVE; | |
5f2aa075 | 1074 | } |
5f2aa075 | 1075 | |
ff4343da | 1076 | epmov = exfat_get_dentry_cached(&mov_es, ES_IDX_STREAM); |
d97e0606 | 1077 | epnew = exfat_get_dentry_cached(&new_es, ES_IDX_STREAM); |
a7a24168 | 1078 | *epnew = *epmov; |
5f2aa075 | 1079 | |
d97e0606 | 1080 | exfat_init_ext_entry(&new_es, num_new_entries, p_uniname); |
ff4343da | 1081 | exfat_remove_entries(inode, &mov_es, ES_IDX_FILE); |
5f2aa075 NJ |
1082 | |
1083 | exfat_chain_set(&ei->dir, p_newdir->dir, p_newdir->size, | |
1084 | p_newdir->flags); | |
1085 | ||
1086 | ei->entry = newentry; | |
d97e0606 YM |
1087 | |
1088 | ret = exfat_put_dentry_set(&new_es, IS_DIRSYNC(inode)); | |
1089 | if (ret) | |
1090 | goto put_mov_es; | |
1091 | ||
ff4343da YM |
1092 | return exfat_put_dentry_set(&mov_es, IS_DIRSYNC(inode)); |
1093 | ||
1094 | put_mov_es: | |
1095 | exfat_put_dentry_set(&mov_es, false); | |
1096 | ||
1097 | return ret; | |
5f2aa075 NJ |
1098 | } |
1099 | ||
5f2aa075 NJ |
1100 | /* rename or move a old file into a new file */ |
1101 | static int __exfat_rename(struct inode *old_parent_inode, | |
1102 | struct exfat_inode_info *ei, struct inode *new_parent_inode, | |
1103 | struct dentry *new_dentry) | |
1104 | { | |
1105 | int ret; | |
1106 | int dentry; | |
1107 | struct exfat_chain olddir, newdir; | |
1108 | struct exfat_chain *p_dir = NULL; | |
1109 | struct exfat_uni_name uni_name; | |
1110 | struct exfat_dentry *ep; | |
1111 | struct super_block *sb = old_parent_inode->i_sb; | |
1112 | struct exfat_sb_info *sbi = EXFAT_SB(sb); | |
1113 | const unsigned char *new_path = new_dentry->d_name.name; | |
1114 | struct inode *new_inode = new_dentry->d_inode; | |
5f2aa075 NJ |
1115 | struct exfat_inode_info *new_ei = NULL; |
1116 | unsigned int new_entry_type = TYPE_UNUSED; | |
1117 | int new_entry = 0; | |
015c0d4f | 1118 | struct buffer_head *new_bh = NULL; |
5f2aa075 NJ |
1119 | |
1120 | /* check the validity of pointer parameters */ | |
1121 | if (new_path == NULL || strlen(new_path) == 0) | |
1122 | return -EINVAL; | |
1123 | ||
1124 | if (ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 1125 | exfat_err(sb, "abnormal access to deleted source dentry"); |
5f2aa075 NJ |
1126 | return -ENOENT; |
1127 | } | |
1128 | ||
204e6cea SS |
1129 | exfat_chain_set(&olddir, EXFAT_I(old_parent_inode)->start_clu, |
1130 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(old_parent_inode), sbi), | |
1131 | EXFAT_I(old_parent_inode)->flags); | |
5f2aa075 NJ |
1132 | dentry = ei->entry; |
1133 | ||
5f2aa075 NJ |
1134 | /* check whether new dir is existing directory and empty */ |
1135 | if (new_inode) { | |
1136 | ret = -EIO; | |
1137 | new_ei = EXFAT_I(new_inode); | |
1138 | ||
1139 | if (new_ei->dir.dir == DIR_DELETED) { | |
d1727d55 | 1140 | exfat_err(sb, "abnormal access to deleted target dentry"); |
5f2aa075 NJ |
1141 | goto out; |
1142 | } | |
1143 | ||
5f2aa075 NJ |
1144 | p_dir = &(new_ei->dir); |
1145 | new_entry = new_ei->entry; | |
c71510b3 | 1146 | ep = exfat_get_dentry(sb, p_dir, new_entry, &new_bh); |
5f2aa075 NJ |
1147 | if (!ep) |
1148 | goto out; | |
1149 | ||
1150 | new_entry_type = exfat_get_entry_type(ep); | |
1151 | brelse(new_bh); | |
1152 | ||
1153 | /* if new_inode exists, update ei */ | |
1154 | if (new_entry_type == TYPE_DIR) { | |
1155 | struct exfat_chain new_clu; | |
1156 | ||
1157 | new_clu.dir = new_ei->start_clu; | |
1158 | new_clu.size = | |
1159 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(new_inode), | |
1160 | sbi); | |
1161 | new_clu.flags = new_ei->flags; | |
1162 | ||
1163 | ret = exfat_check_dir_empty(sb, &new_clu); | |
1164 | if (ret) | |
1165 | goto out; | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | /* check the validity of directory name in the given new pathname */ | |
1170 | ret = exfat_resolve_path(new_parent_inode, new_path, &newdir, | |
1171 | &uni_name); | |
1172 | if (ret) | |
1173 | goto out; | |
1174 | ||
7018ec68 | 1175 | exfat_set_volume_dirty(sb); |
5f2aa075 NJ |
1176 | |
1177 | if (olddir.dir == newdir.dir) | |
1178 | ret = exfat_rename_file(new_parent_inode, &olddir, dentry, | |
1179 | &uni_name, ei); | |
1180 | else | |
1181 | ret = exfat_move_file(new_parent_inode, &olddir, dentry, | |
1182 | &newdir, &uni_name, ei); | |
1183 | ||
1184 | if (!ret && new_inode) { | |
ff4343da YM |
1185 | struct exfat_entry_set_cache es; |
1186 | ||
5f2aa075 | 1187 | /* delete entries of new_dir */ |
ff4343da YM |
1188 | ret = exfat_get_dentry_set(&es, sb, p_dir, new_entry, |
1189 | ES_ALL_ENTRIES); | |
1190 | if (ret) { | |
5f2aa075 NJ |
1191 | ret = -EIO; |
1192 | goto del_out; | |
1193 | } | |
1194 | ||
ff4343da | 1195 | exfat_remove_entries(new_inode, &es, ES_IDX_FILE); |
5f2aa075 | 1196 | |
ff4343da YM |
1197 | ret = exfat_put_dentry_set(&es, IS_DIRSYNC(new_inode)); |
1198 | if (ret) | |
5f2aa075 | 1199 | goto del_out; |
5f2aa075 NJ |
1200 | |
1201 | /* Free the clusters if new_inode is a dir(as if exfat_rmdir) */ | |
dab48b8f YM |
1202 | if (new_entry_type == TYPE_DIR && |
1203 | new_ei->start_clu != EXFAT_EOF_CLUSTER) { | |
5f2aa075 NJ |
1204 | /* new_ei, new_clu_to_free */ |
1205 | struct exfat_chain new_clu_to_free; | |
1206 | ||
1207 | exfat_chain_set(&new_clu_to_free, new_ei->start_clu, | |
1208 | EXFAT_B_TO_CLU_ROUND_UP(i_size_read(new_inode), | |
1209 | sbi), new_ei->flags); | |
1210 | ||
1211 | if (exfat_free_cluster(new_inode, &new_clu_to_free)) { | |
1212 | /* just set I/O error only */ | |
1213 | ret = -EIO; | |
1214 | } | |
1215 | ||
1216 | i_size_write(new_inode, 0); | |
11a347fb | 1217 | new_ei->valid_size = 0; |
5f2aa075 NJ |
1218 | new_ei->start_clu = EXFAT_EOF_CLUSTER; |
1219 | new_ei->flags = ALLOC_NO_FAT_CHAIN; | |
1220 | } | |
1221 | del_out: | |
1222 | /* Update new_inode ei | |
1223 | * Prevent syncing removed new_inode | |
1224 | * (new_ei is already initialized above code ("if (new_inode)") | |
1225 | */ | |
1226 | new_ei->dir.dir = DIR_DELETED; | |
1227 | } | |
5f2aa075 NJ |
1228 | out: |
1229 | return ret; | |
1230 | } | |
1231 | ||
e18275ae | 1232 | static int exfat_rename(struct mnt_idmap *idmap, |
549c7297 CB |
1233 | struct inode *old_dir, struct dentry *old_dentry, |
1234 | struct inode *new_dir, struct dentry *new_dentry, | |
1235 | unsigned int flags) | |
5f2aa075 NJ |
1236 | { |
1237 | struct inode *old_inode, *new_inode; | |
1238 | struct super_block *sb = old_dir->i_sb; | |
1239 | loff_t i_pos; | |
1240 | int err; | |
96cf51ac | 1241 | loff_t size = i_size_read(new_dir); |
5f2aa075 NJ |
1242 | |
1243 | /* | |
1244 | * The VFS already checks for existence, so for local filesystems | |
1245 | * the RENAME_NOREPLACE implementation is equivalent to plain rename. | |
1246 | * Don't support any other flags | |
1247 | */ | |
1248 | if (flags & ~RENAME_NOREPLACE) | |
1249 | return -EINVAL; | |
1250 | ||
1251 | mutex_lock(&EXFAT_SB(sb)->s_lock); | |
1252 | old_inode = old_dentry->d_inode; | |
1253 | new_inode = new_dentry->d_inode; | |
1254 | ||
1255 | err = __exfat_rename(old_dir, EXFAT_I(old_inode), new_dir, new_dentry); | |
1256 | if (err) | |
1257 | goto unlock; | |
1258 | ||
1259 | inode_inc_iversion(new_dir); | |
d06cdfdd JL |
1260 | simple_rename_timestamp(old_dir, old_dentry, new_dir, new_dentry); |
1261 | EXFAT_I(new_dir)->i_crtime = current_time(new_dir); | |
4c72a36e | 1262 | exfat_truncate_inode_atime(new_dir); |
96cf51ac | 1263 | if (IS_DIRSYNC(new_dir) && size != i_size_read(new_dir)) |
5f2aa075 NJ |
1264 | exfat_sync_inode(new_dir); |
1265 | else | |
1266 | mark_inode_dirty(new_dir); | |
1267 | ||
1268 | i_pos = ((loff_t)EXFAT_I(old_inode)->dir.dir << 32) | | |
1269 | (EXFAT_I(old_inode)->entry & 0xffffffff); | |
1270 | exfat_unhash_inode(old_inode); | |
1271 | exfat_hash_inode(old_inode, i_pos); | |
1272 | if (IS_DIRSYNC(new_dir)) | |
1273 | exfat_sync_inode(old_inode); | |
1274 | else | |
1275 | mark_inode_dirty(old_inode); | |
1276 | ||
1277 | if (S_ISDIR(old_inode->i_mode) && old_dir != new_dir) { | |
1278 | drop_nlink(old_dir); | |
1279 | if (!new_inode) | |
1280 | inc_nlink(new_dir); | |
1281 | } | |
1282 | ||
1283 | inode_inc_iversion(old_dir); | |
dc38fdc5 YM |
1284 | if (new_dir != old_dir) |
1285 | mark_inode_dirty(old_dir); | |
5f2aa075 NJ |
1286 | |
1287 | if (new_inode) { | |
1288 | exfat_unhash_inode(new_inode); | |
1289 | ||
1290 | /* skip drop_nlink if new_inode already has been dropped */ | |
1291 | if (new_inode->i_nlink) { | |
1292 | drop_nlink(new_inode); | |
1293 | if (S_ISDIR(new_inode->i_mode)) | |
1294 | drop_nlink(new_inode); | |
1295 | } else { | |
d1727d55 | 1296 | exfat_warn(sb, "abnormal access to an inode dropped"); |
5f2aa075 NJ |
1297 | WARN_ON(new_inode->i_nlink == 0); |
1298 | } | |
f29f1908 | 1299 | EXFAT_I(new_inode)->i_crtime = current_time(new_inode); |
5f2aa075 NJ |
1300 | } |
1301 | ||
1302 | unlock: | |
1303 | mutex_unlock(&EXFAT_SB(sb)->s_lock); | |
1304 | return err; | |
1305 | } | |
1306 | ||
1307 | const struct inode_operations exfat_dir_inode_operations = { | |
1308 | .create = exfat_create, | |
1309 | .lookup = exfat_lookup, | |
1310 | .unlink = exfat_unlink, | |
1311 | .mkdir = exfat_mkdir, | |
1312 | .rmdir = exfat_rmdir, | |
1313 | .rename = exfat_rename, | |
1314 | .setattr = exfat_setattr, | |
1315 | .getattr = exfat_getattr, | |
1316 | }; |