Commit | Line | Data |
---|---|---|
7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
6b4ea016 JK |
3 | * fs/f2fs/dir.c |
4 | * | |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
6 | * http://www.samsung.com/ | |
6b4ea016 JK |
7 | */ |
8 | #include <linux/fs.h> | |
9 | #include <linux/f2fs_fs.h> | |
4414dea8 | 10 | #include <linux/sched/signal.h> |
6b4ea016 | 11 | #include "f2fs.h" |
398b1ac5 | 12 | #include "node.h" |
6b4ea016 | 13 | #include "acl.h" |
8ae8f162 | 14 | #include "xattr.h" |
e97a3c4c | 15 | #include <trace/events/f2fs.h> |
6b4ea016 JK |
16 | |
17 | static unsigned long dir_blocks(struct inode *inode) | |
18 | { | |
09cbfeaf KS |
19 | return ((unsigned long long) (i_size_read(inode) + PAGE_SIZE - 1)) |
20 | >> PAGE_SHIFT; | |
6b4ea016 JK |
21 | } |
22 | ||
38431545 | 23 | static unsigned int dir_buckets(unsigned int level, int dir_level) |
6b4ea016 | 24 | { |
bfec07d0 | 25 | if (level + dir_level < MAX_DIR_HASH_DEPTH / 2) |
38431545 | 26 | return 1 << (level + dir_level); |
6b4ea016 | 27 | else |
bfec07d0 | 28 | return MAX_DIR_BUCKETS; |
6b4ea016 JK |
29 | } |
30 | ||
31 | static unsigned int bucket_blocks(unsigned int level) | |
32 | { | |
33 | if (level < MAX_DIR_HASH_DEPTH / 2) | |
34 | return 2; | |
35 | else | |
36 | return 4; | |
37 | } | |
38 | ||
ebfa7322 | 39 | static unsigned char f2fs_filetype_table[F2FS_FT_MAX] = { |
6b4ea016 JK |
40 | [F2FS_FT_UNKNOWN] = DT_UNKNOWN, |
41 | [F2FS_FT_REG_FILE] = DT_REG, | |
42 | [F2FS_FT_DIR] = DT_DIR, | |
43 | [F2FS_FT_CHRDEV] = DT_CHR, | |
44 | [F2FS_FT_BLKDEV] = DT_BLK, | |
45 | [F2FS_FT_FIFO] = DT_FIFO, | |
46 | [F2FS_FT_SOCK] = DT_SOCK, | |
47 | [F2FS_FT_SYMLINK] = DT_LNK, | |
48 | }; | |
49 | ||
6b4ea016 JK |
50 | static unsigned char f2fs_type_by_mode[S_IFMT >> S_SHIFT] = { |
51 | [S_IFREG >> S_SHIFT] = F2FS_FT_REG_FILE, | |
52 | [S_IFDIR >> S_SHIFT] = F2FS_FT_DIR, | |
53 | [S_IFCHR >> S_SHIFT] = F2FS_FT_CHRDEV, | |
54 | [S_IFBLK >> S_SHIFT] = F2FS_FT_BLKDEV, | |
55 | [S_IFIFO >> S_SHIFT] = F2FS_FT_FIFO, | |
56 | [S_IFSOCK >> S_SHIFT] = F2FS_FT_SOCK, | |
57 | [S_IFLNK >> S_SHIFT] = F2FS_FT_SYMLINK, | |
58 | }; | |
59 | ||
2e79d951 | 60 | static void set_de_type(struct f2fs_dir_entry *de, umode_t mode) |
6b4ea016 | 61 | { |
6b4ea016 JK |
62 | de->file_type = f2fs_type_by_mode[(mode & S_IFMT) >> S_SHIFT]; |
63 | } | |
64 | ||
4d57b86d | 65 | unsigned char f2fs_get_de_type(struct f2fs_dir_entry *de) |
675f10bd CY |
66 | { |
67 | if (de->file_type < F2FS_FT_MAX) | |
68 | return f2fs_filetype_table[de->file_type]; | |
69 | return DT_UNKNOWN; | |
70 | } | |
71 | ||
38431545 JK |
72 | static unsigned long dir_block_index(unsigned int level, |
73 | int dir_level, unsigned int idx) | |
6b4ea016 JK |
74 | { |
75 | unsigned long i; | |
76 | unsigned long bidx = 0; | |
77 | ||
78 | for (i = 0; i < level; i++) | |
38431545 | 79 | bidx += dir_buckets(i, dir_level) * bucket_blocks(i); |
6b4ea016 JK |
80 | bidx += idx * bucket_blocks(level); |
81 | return bidx; | |
82 | } | |
83 | ||
6b4ea016 | 84 | static struct f2fs_dir_entry *find_in_block(struct page *dentry_page, |
0b81d077 | 85 | struct fscrypt_name *fname, |
6e22c691 JK |
86 | f2fs_hash_t namehash, |
87 | int *max_slots, | |
4e6ebf6d JK |
88 | struct page **res_page) |
89 | { | |
90 | struct f2fs_dentry_block *dentry_blk; | |
91 | struct f2fs_dir_entry *de; | |
7b3cd7d6 | 92 | struct f2fs_dentry_ptr d; |
4e6ebf6d | 93 | |
bdbc90fa | 94 | dentry_blk = (struct f2fs_dentry_block *)page_address(dentry_page); |
7b3cd7d6 | 95 | |
64c24ecb | 96 | make_dentry_ptr_block(NULL, &d, dentry_blk); |
4d57b86d | 97 | de = f2fs_find_target_dentry(fname, namehash, max_slots, &d); |
4e6ebf6d JK |
98 | if (de) |
99 | *res_page = dentry_page; | |
4e6ebf6d | 100 | |
4e6ebf6d JK |
101 | return de; |
102 | } | |
103 | ||
4d57b86d | 104 | struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname, |
6e22c691 JK |
105 | f2fs_hash_t namehash, int *max_slots, |
106 | struct f2fs_dentry_ptr *d) | |
6b4ea016 JK |
107 | { |
108 | struct f2fs_dir_entry *de; | |
5d0c6671 | 109 | unsigned long bit_pos = 0; |
5d0c6671 | 110 | int max_len = 0; |
6b4ea016 | 111 | |
7b3cd7d6 JK |
112 | if (max_slots) |
113 | *max_slots = 0; | |
114 | while (bit_pos < d->max) { | |
115 | if (!test_bit_le(bit_pos, d->bitmap)) { | |
5d0c6671 | 116 | bit_pos++; |
bda19076 | 117 | max_len++; |
5d0c6671 JK |
118 | continue; |
119 | } | |
bda19076 | 120 | |
7b3cd7d6 | 121 | de = &d->dentry[bit_pos]; |
6e22c691 | 122 | |
a4a13f58 CY |
123 | if (unlikely(!de->name_len)) { |
124 | bit_pos++; | |
125 | continue; | |
126 | } | |
127 | ||
1f73d491 EB |
128 | if (de->hash_code == namehash && |
129 | fscrypt_match_name(fname, d->filename[bit_pos], | |
130 | le16_to_cpu(de->name_len))) | |
4e6ebf6d | 131 | goto found; |
1f73d491 | 132 | |
bda19076 | 133 | if (max_slots && max_len > *max_slots) |
5d0c6671 | 134 | *max_slots = max_len; |
bda19076 | 135 | max_len = 0; |
81e366f8 | 136 | |
5d0c6671 | 137 | bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); |
6b4ea016 JK |
138 | } |
139 | ||
140 | de = NULL; | |
6b4ea016 | 141 | found: |
7b3cd7d6 | 142 | if (max_slots && max_len > *max_slots) |
5d0c6671 | 143 | *max_slots = max_len; |
6b4ea016 JK |
144 | return de; |
145 | } | |
146 | ||
147 | static struct f2fs_dir_entry *find_in_level(struct inode *dir, | |
6e22c691 | 148 | unsigned int level, |
0b81d077 | 149 | struct fscrypt_name *fname, |
6e22c691 | 150 | struct page **res_page) |
6b4ea016 | 151 | { |
6e22c691 JK |
152 | struct qstr name = FSTR_TO_QSTR(&fname->disk_name); |
153 | int s = GET_DENTRY_SLOTS(name.len); | |
6b4ea016 JK |
154 | unsigned int nbucket, nblock; |
155 | unsigned int bidx, end_block; | |
156 | struct page *dentry_page; | |
157 | struct f2fs_dir_entry *de = NULL; | |
158 | bool room = false; | |
4e6ebf6d | 159 | int max_slots; |
6332cd32 | 160 | f2fs_hash_t namehash = f2fs_dentry_hash(&name, fname); |
6b4ea016 | 161 | |
38431545 | 162 | nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level); |
6b4ea016 JK |
163 | nblock = bucket_blocks(level); |
164 | ||
38431545 JK |
165 | bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level, |
166 | le32_to_cpu(namehash) % nbucket); | |
6b4ea016 JK |
167 | end_block = bidx + nblock; |
168 | ||
169 | for (; bidx < end_block; bidx++) { | |
170 | /* no need to allocate new dentry pages to all the indices */ | |
4d57b86d | 171 | dentry_page = f2fs_find_data_page(dir, bidx); |
6b4ea016 | 172 | if (IS_ERR(dentry_page)) { |
42d96401 JK |
173 | if (PTR_ERR(dentry_page) == -ENOENT) { |
174 | room = true; | |
175 | continue; | |
176 | } else { | |
177 | *res_page = dentry_page; | |
178 | break; | |
179 | } | |
6b4ea016 JK |
180 | } |
181 | ||
6e22c691 JK |
182 | de = find_in_block(dentry_page, fname, namehash, &max_slots, |
183 | res_page); | |
6b4ea016 JK |
184 | if (de) |
185 | break; | |
186 | ||
187 | if (max_slots >= s) | |
188 | room = true; | |
189 | f2fs_put_page(dentry_page, 0); | |
190 | } | |
191 | ||
d3bb910c SY |
192 | if (!de && room && F2FS_I(dir)->chash != namehash) { |
193 | F2FS_I(dir)->chash = namehash; | |
194 | F2FS_I(dir)->clevel = level; | |
6b4ea016 JK |
195 | } |
196 | ||
197 | return de; | |
198 | } | |
199 | ||
e7ba108a SL |
200 | struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir, |
201 | struct fscrypt_name *fname, struct page **res_page) | |
6b4ea016 | 202 | { |
6b4ea016 JK |
203 | unsigned long npages = dir_blocks(dir); |
204 | struct f2fs_dir_entry *de = NULL; | |
6b4ea016 JK |
205 | unsigned int max_depth; |
206 | unsigned int level; | |
6e22c691 JK |
207 | |
208 | if (f2fs_has_inline_dentry(dir)) { | |
42d96401 | 209 | *res_page = NULL; |
4d57b86d | 210 | de = f2fs_find_in_inline_dir(dir, fname, res_page); |
6e22c691 JK |
211 | goto out; |
212 | } | |
622f28ae | 213 | |
42d96401 JK |
214 | if (npages == 0) { |
215 | *res_page = NULL; | |
6e22c691 | 216 | goto out; |
42d96401 | 217 | } |
6b4ea016 | 218 | |
6b4ea016 | 219 | max_depth = F2FS_I(dir)->i_current_depth; |
1f6fa261 | 220 | if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) { |
dcbb4c10 JP |
221 | f2fs_warn(F2FS_I_SB(dir), "Corrupted max_depth of %lu: %u", |
222 | dir->i_ino, max_depth); | |
1f6fa261 | 223 | max_depth = MAX_DIR_HASH_DEPTH; |
205b9822 | 224 | f2fs_i_depth_write(dir, max_depth); |
1f6fa261 | 225 | } |
6b4ea016 JK |
226 | |
227 | for (level = 0; level < max_depth; level++) { | |
42d96401 | 228 | *res_page = NULL; |
e7ba108a | 229 | de = find_in_level(dir, level, fname, res_page); |
42d96401 | 230 | if (de || IS_ERR(*res_page)) |
6b4ea016 JK |
231 | break; |
232 | } | |
6e22c691 | 233 | out: |
d3bb910c SY |
234 | /* This is to increase the speed of f2fs_create */ |
235 | if (!de) | |
236 | F2FS_I(dir)->task = current; | |
e7ba108a SL |
237 | return de; |
238 | } | |
239 | ||
240 | /* | |
241 | * Find an entry in the specified directory with the wanted name. | |
242 | * It returns the page where the entry was found (as a parameter - res_page), | |
243 | * and the entry itself. Page is returned mapped and unlocked. | |
244 | * Entry is guaranteed to be valid. | |
245 | */ | |
246 | struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, | |
247 | const struct qstr *child, struct page **res_page) | |
248 | { | |
249 | struct f2fs_dir_entry *de = NULL; | |
250 | struct fscrypt_name fname; | |
251 | int err; | |
252 | ||
253 | err = fscrypt_setup_filename(dir, child, 1, &fname); | |
254 | if (err) { | |
54475f53 EB |
255 | if (err == -ENOENT) |
256 | *res_page = NULL; | |
257 | else | |
258 | *res_page = ERR_PTR(err); | |
e7ba108a SL |
259 | return NULL; |
260 | } | |
261 | ||
262 | de = __f2fs_find_entry(dir, &fname, res_page); | |
263 | ||
0b81d077 | 264 | fscrypt_free_filename(&fname); |
6b4ea016 JK |
265 | return de; |
266 | } | |
267 | ||
268 | struct f2fs_dir_entry *f2fs_parent_dir(struct inode *dir, struct page **p) | |
269 | { | |
8be0fea9 | 270 | struct qstr dotdot = QSTR_INIT("..", 2); |
622f28ae | 271 | |
8be0fea9 | 272 | return f2fs_find_entry(dir, &dotdot, p); |
6b4ea016 JK |
273 | } |
274 | ||
835c92d4 | 275 | ino_t f2fs_inode_by_name(struct inode *dir, const struct qstr *qstr, |
91246c21 | 276 | struct page **page) |
6b4ea016 JK |
277 | { |
278 | ino_t res = 0; | |
279 | struct f2fs_dir_entry *de; | |
6b4ea016 | 280 | |
91246c21 | 281 | de = f2fs_find_entry(dir, qstr, page); |
6b4ea016 JK |
282 | if (de) { |
283 | res = le32_to_cpu(de->ino); | |
91246c21 | 284 | f2fs_put_page(*page, 0); |
6b4ea016 JK |
285 | } |
286 | ||
287 | return res; | |
288 | } | |
289 | ||
290 | void f2fs_set_link(struct inode *dir, struct f2fs_dir_entry *de, | |
291 | struct page *page, struct inode *inode) | |
292 | { | |
59a06155 | 293 | enum page_type type = f2fs_has_inline_dentry(dir) ? NODE : DATA; |
6b4ea016 | 294 | lock_page(page); |
bae0ee7a | 295 | f2fs_wait_on_page_writeback(page, type, true, true); |
6b4ea016 | 296 | de->ino = cpu_to_le32(inode->i_ino); |
510022a8 | 297 | set_de_type(de, inode->i_mode); |
6b4ea016 | 298 | set_page_dirty(page); |
6666e6aa | 299 | |
078cd827 | 300 | dir->i_mtime = dir->i_ctime = current_time(dir); |
7c45729a | 301 | f2fs_mark_inode_dirty_sync(dir, false); |
6b4ea016 | 302 | f2fs_put_page(page, 1); |
6b4ea016 JK |
303 | } |
304 | ||
44a83ff6 | 305 | static void init_dent_inode(const struct qstr *name, struct page *ipage) |
6b4ea016 | 306 | { |
58bfaf44 | 307 | struct f2fs_inode *ri; |
6b4ea016 | 308 | |
bae0ee7a | 309 | f2fs_wait_on_page_writeback(ipage, NODE, true, true); |
54b591df | 310 | |
53dc9a67 | 311 | /* copy name info. to this inode page */ |
58bfaf44 JK |
312 | ri = F2FS_INODE(ipage); |
313 | ri->i_namelen = cpu_to_le32(name->len); | |
314 | memcpy(ri->i_name, name->name, name->len); | |
6b4ea016 JK |
315 | set_page_dirty(ipage); |
316 | } | |
317 | ||
4d57b86d | 318 | void f2fs_do_make_empty_dir(struct inode *inode, struct inode *parent, |
062a3e7b JK |
319 | struct f2fs_dentry_ptr *d) |
320 | { | |
291bf80b CY |
321 | struct qstr dot = QSTR_INIT(".", 1); |
322 | struct qstr dotdot = QSTR_INIT("..", 2); | |
062a3e7b | 323 | |
291bf80b CY |
324 | /* update dirent of "." */ |
325 | f2fs_update_dentry(inode->i_ino, inode->i_mode, d, &dot, 0, 0); | |
062a3e7b | 326 | |
291bf80b CY |
327 | /* update dirent of ".." */ |
328 | f2fs_update_dentry(parent->i_ino, parent->i_mode, d, &dotdot, 0, 1); | |
062a3e7b JK |
329 | } |
330 | ||
44a83ff6 JK |
331 | static int make_empty_dir(struct inode *inode, |
332 | struct inode *parent, struct page *page) | |
39936837 JK |
333 | { |
334 | struct page *dentry_page; | |
335 | struct f2fs_dentry_block *dentry_blk; | |
062a3e7b | 336 | struct f2fs_dentry_ptr d; |
39936837 | 337 | |
622f28ae | 338 | if (f2fs_has_inline_dentry(inode)) |
4d57b86d | 339 | return f2fs_make_empty_inline_dir(inode, parent, page); |
622f28ae | 340 | |
4d57b86d | 341 | dentry_page = f2fs_get_new_data_page(inode, page, 0, true); |
39936837 JK |
342 | if (IS_ERR(dentry_page)) |
343 | return PTR_ERR(dentry_page); | |
344 | ||
bdbc90fa | 345 | dentry_blk = page_address(dentry_page); |
39936837 | 346 | |
64c24ecb | 347 | make_dentry_ptr_block(NULL, &d, dentry_blk); |
4d57b86d | 348 | f2fs_do_make_empty_dir(inode, parent, &d); |
39936837 | 349 | |
39936837 JK |
350 | set_page_dirty(dentry_page); |
351 | f2fs_put_page(dentry_page, 1); | |
352 | return 0; | |
353 | } | |
354 | ||
4d57b86d | 355 | struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir, |
9421d570 CY |
356 | const struct qstr *new_name, const struct qstr *orig_name, |
357 | struct page *dpage) | |
6b4ea016 | 358 | { |
44a83ff6 | 359 | struct page *page; |
ff62af20 | 360 | int dummy_encrypt = DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(dir)); |
44a83ff6 JK |
361 | int err; |
362 | ||
91942321 | 363 | if (is_inode_flag_set(inode, FI_NEW_INODE)) { |
4d57b86d | 364 | page = f2fs_new_inode_page(inode); |
44a83ff6 JK |
365 | if (IS_ERR(page)) |
366 | return page; | |
6b4ea016 JK |
367 | |
368 | if (S_ISDIR(inode->i_mode)) { | |
221149c0 JK |
369 | /* in order to handle error case */ |
370 | get_page(page); | |
44a83ff6 | 371 | err = make_empty_dir(inode, dir, page); |
221149c0 JK |
372 | if (err) { |
373 | lock_page(page); | |
374 | goto put_error; | |
375 | } | |
376 | put_page(page); | |
6b4ea016 JK |
377 | } |
378 | ||
bce8d112 | 379 | err = f2fs_init_acl(inode, dir, page, dpage); |
44a83ff6 | 380 | if (err) |
a8865372 | 381 | goto put_error; |
44a83ff6 | 382 | |
9421d570 | 383 | err = f2fs_init_security(inode, dir, orig_name, page); |
8ae8f162 | 384 | if (err) |
a8865372 | 385 | goto put_error; |
fcc85a4d | 386 | |
62230e0d | 387 | if ((IS_ENCRYPTED(dir) || dummy_encrypt) && |
ff62af20 | 388 | f2fs_may_encrypt(inode)) { |
0b81d077 | 389 | err = fscrypt_inherit_context(dir, inode, page, false); |
fcc85a4d JK |
390 | if (err) |
391 | goto put_error; | |
392 | } | |
6b4ea016 | 393 | } else { |
4d57b86d | 394 | page = f2fs_get_node_page(F2FS_I_SB(dir), inode->i_ino); |
44a83ff6 JK |
395 | if (IS_ERR(page)) |
396 | return page; | |
6b4ea016 | 397 | } |
44a83ff6 | 398 | |
d03ba4cc | 399 | if (new_name) { |
9421d570 | 400 | init_dent_inode(new_name, page); |
62230e0d | 401 | if (IS_ENCRYPTED(dir)) |
d03ba4cc KM |
402 | file_set_enc_name(inode); |
403 | } | |
44a83ff6 | 404 | |
83d5d6f6 JK |
405 | /* |
406 | * This file should be checkpointed during fsync. | |
407 | * We lost i_pino from now on. | |
408 | */ | |
91942321 | 409 | if (is_inode_flag_set(inode, FI_INC_LINK)) { |
d58dfb75 SY |
410 | if (!S_ISDIR(inode->i_mode)) |
411 | file_lost_pino(inode); | |
50732df0 CY |
412 | /* |
413 | * If link the tmpfile to alias through linkat path, | |
414 | * we should remove this inode from orphan list. | |
415 | */ | |
416 | if (inode->i_nlink == 0) | |
4d57b86d | 417 | f2fs_remove_orphan_inode(F2FS_I_SB(dir), inode->i_ino); |
a1961246 | 418 | f2fs_i_links_write(inode, true); |
6b4ea016 | 419 | } |
44a83ff6 JK |
420 | return page; |
421 | ||
a8865372 | 422 | put_error: |
221149c0 | 423 | clear_nlink(inode); |
4d57b86d | 424 | f2fs_update_inode(inode, page); |
221149c0 | 425 | f2fs_put_page(page, 1); |
44a83ff6 | 426 | return ERR_PTR(err); |
6b4ea016 JK |
427 | } |
428 | ||
4d57b86d | 429 | void f2fs_update_parent_metadata(struct inode *dir, struct inode *inode, |
6b4ea016 JK |
430 | unsigned int current_depth) |
431 | { | |
91942321 | 432 | if (inode && is_inode_flag_set(inode, FI_NEW_INODE)) { |
ee6d182f | 433 | if (S_ISDIR(inode->i_mode)) |
a1961246 | 434 | f2fs_i_links_write(dir, true); |
91942321 | 435 | clear_inode_flag(inode, FI_NEW_INODE); |
6b4ea016 | 436 | } |
078cd827 | 437 | dir->i_mtime = dir->i_ctime = current_time(dir); |
7c45729a | 438 | f2fs_mark_inode_dirty_sync(dir, false); |
a18ff063 | 439 | |
ee6d182f | 440 | if (F2FS_I(dir)->i_current_depth != current_depth) |
205b9822 | 441 | f2fs_i_depth_write(dir, current_depth); |
6b4ea016 | 442 | |
91942321 JK |
443 | if (inode && is_inode_flag_set(inode, FI_INC_LINK)) |
444 | clear_inode_flag(inode, FI_INC_LINK); | |
6b4ea016 JK |
445 | } |
446 | ||
4d57b86d | 447 | int f2fs_room_for_filename(const void *bitmap, int slots, int max_slots) |
6b4ea016 JK |
448 | { |
449 | int bit_start = 0; | |
450 | int zero_start, zero_end; | |
451 | next: | |
a82afa20 JK |
452 | zero_start = find_next_zero_bit_le(bitmap, max_slots, bit_start); |
453 | if (zero_start >= max_slots) | |
454 | return max_slots; | |
455 | ||
456 | zero_end = find_next_bit_le(bitmap, max_slots, zero_start); | |
6b4ea016 JK |
457 | if (zero_end - zero_start >= slots) |
458 | return zero_start; | |
459 | ||
460 | bit_start = zero_end + 1; | |
461 | ||
a82afa20 JK |
462 | if (zero_end + 1 >= max_slots) |
463 | return max_slots; | |
6b4ea016 JK |
464 | goto next; |
465 | } | |
466 | ||
510022a8 | 467 | void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d, |
3b4d732a CY |
468 | const struct qstr *name, f2fs_hash_t name_hash, |
469 | unsigned int bit_pos) | |
470 | { | |
471 | struct f2fs_dir_entry *de; | |
472 | int slots = GET_DENTRY_SLOTS(name->len); | |
473 | int i; | |
474 | ||
475 | de = &d->dentry[bit_pos]; | |
476 | de->hash_code = name_hash; | |
477 | de->name_len = cpu_to_le16(name->len); | |
478 | memcpy(d->filename[bit_pos], name->name, name->len); | |
510022a8 JK |
479 | de->ino = cpu_to_le32(ino); |
480 | set_de_type(de, mode); | |
7d9dfa1d | 481 | for (i = 0; i < slots; i++) { |
6bf6b267 | 482 | __set_bit_le(bit_pos + i, (void *)d->bitmap); |
7d9dfa1d JK |
483 | /* avoid wrong garbage data for readdir */ |
484 | if (i) | |
485 | (de + i)->name_len = 0; | |
486 | } | |
3b4d732a CY |
487 | } |
488 | ||
675f10bd | 489 | int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name, |
9421d570 | 490 | const struct qstr *orig_name, |
510022a8 | 491 | struct inode *inode, nid_t ino, umode_t mode) |
6b4ea016 JK |
492 | { |
493 | unsigned int bit_pos; | |
494 | unsigned int level; | |
495 | unsigned int current_depth; | |
496 | unsigned long bidx, block; | |
497 | f2fs_hash_t dentry_hash; | |
6b4ea016 | 498 | unsigned int nbucket, nblock; |
6b4ea016 JK |
499 | struct page *dentry_page = NULL; |
500 | struct f2fs_dentry_block *dentry_blk = NULL; | |
3b4d732a | 501 | struct f2fs_dentry_ptr d; |
510022a8 | 502 | struct page *page = NULL; |
675f10bd | 503 | int slots, err = 0; |
622f28ae | 504 | |
6b4ea016 | 505 | level = 0; |
675f10bd | 506 | slots = GET_DENTRY_SLOTS(new_name->len); |
6332cd32 | 507 | dentry_hash = f2fs_dentry_hash(new_name, NULL); |
9ea97163 | 508 | |
6b4ea016 JK |
509 | current_depth = F2FS_I(dir)->i_current_depth; |
510 | if (F2FS_I(dir)->chash == dentry_hash) { | |
511 | level = F2FS_I(dir)->clevel; | |
512 | F2FS_I(dir)->chash = 0; | |
513 | } | |
514 | ||
515 | start: | |
55523519 CY |
516 | if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH)) { |
517 | f2fs_show_injection_info(FAULT_DIR_DEPTH); | |
cb78942b | 518 | return -ENOSPC; |
55523519 | 519 | } |
7fa750a1 | 520 | |
675f10bd CY |
521 | if (unlikely(current_depth == MAX_DIR_HASH_DEPTH)) |
522 | return -ENOSPC; | |
6b4ea016 JK |
523 | |
524 | /* Increase the depth, if required */ | |
525 | if (level == current_depth) | |
526 | ++current_depth; | |
527 | ||
38431545 | 528 | nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level); |
6b4ea016 JK |
529 | nblock = bucket_blocks(level); |
530 | ||
38431545 JK |
531 | bidx = dir_block_index(level, F2FS_I(dir)->i_dir_level, |
532 | (le32_to_cpu(dentry_hash) % nbucket)); | |
6b4ea016 JK |
533 | |
534 | for (block = bidx; block <= (bidx + nblock - 1); block++) { | |
4d57b86d | 535 | dentry_page = f2fs_get_new_data_page(dir, NULL, block, true); |
675f10bd CY |
536 | if (IS_ERR(dentry_page)) |
537 | return PTR_ERR(dentry_page); | |
6b4ea016 | 538 | |
bdbc90fa | 539 | dentry_blk = page_address(dentry_page); |
4d57b86d | 540 | bit_pos = f2fs_room_for_filename(&dentry_blk->dentry_bitmap, |
a82afa20 | 541 | slots, NR_DENTRY_IN_BLOCK); |
6b4ea016 JK |
542 | if (bit_pos < NR_DENTRY_IN_BLOCK) |
543 | goto add_dentry; | |
544 | ||
6b4ea016 | 545 | f2fs_put_page(dentry_page, 1); |
6b4ea016 JK |
546 | } |
547 | ||
548 | /* Move to next level to find the empty slot for new dentry */ | |
549 | ++level; | |
550 | goto start; | |
551 | add_dentry: | |
bae0ee7a | 552 | f2fs_wait_on_page_writeback(dentry_page, DATA, true, true); |
6b4ea016 | 553 | |
510022a8 JK |
554 | if (inode) { |
555 | down_write(&F2FS_I(inode)->i_sem); | |
4d57b86d | 556 | page = f2fs_init_inode_metadata(inode, dir, new_name, |
9421d570 | 557 | orig_name, NULL); |
510022a8 JK |
558 | if (IS_ERR(page)) { |
559 | err = PTR_ERR(page); | |
560 | goto fail; | |
561 | } | |
44a83ff6 | 562 | } |
3b4d732a | 563 | |
64c24ecb | 564 | make_dentry_ptr_block(NULL, &d, dentry_blk); |
675f10bd | 565 | f2fs_update_dentry(ino, mode, &d, new_name, dentry_hash, bit_pos); |
3b4d732a | 566 | |
6b4ea016 | 567 | set_page_dirty(dentry_page); |
6666e6aa | 568 | |
510022a8 | 569 | if (inode) { |
205b9822 | 570 | f2fs_i_pino_write(inode, dir->i_ino); |
510022a8 JK |
571 | f2fs_put_page(page, 1); |
572 | } | |
44a83ff6 | 573 | |
4d57b86d | 574 | f2fs_update_parent_metadata(dir, inode, current_depth); |
6b4ea016 | 575 | fail: |
510022a8 JK |
576 | if (inode) |
577 | up_write(&F2FS_I(inode)->i_sem); | |
d928bfbf | 578 | |
6b4ea016 | 579 | f2fs_put_page(dentry_page, 1); |
675f10bd CY |
580 | |
581 | return err; | |
582 | } | |
583 | ||
4d57b86d | 584 | int f2fs_add_dentry(struct inode *dir, struct fscrypt_name *fname, |
e7ba108a SL |
585 | struct inode *inode, nid_t ino, umode_t mode) |
586 | { | |
587 | struct qstr new_name; | |
588 | int err = -EAGAIN; | |
589 | ||
590 | new_name.name = fname_name(fname); | |
591 | new_name.len = fname_len(fname); | |
592 | ||
593 | if (f2fs_has_inline_dentry(dir)) | |
594 | err = f2fs_add_inline_entry(dir, &new_name, fname->usr_fname, | |
595 | inode, ino, mode); | |
596 | if (err == -EAGAIN) | |
597 | err = f2fs_add_regular_entry(dir, &new_name, fname->usr_fname, | |
598 | inode, ino, mode); | |
599 | ||
600 | f2fs_update_time(F2FS_I_SB(dir), REQ_TIME); | |
601 | return err; | |
602 | } | |
603 | ||
675f10bd CY |
604 | /* |
605 | * Caller should grab and release a rwsem by calling f2fs_lock_op() and | |
606 | * f2fs_unlock_op(). | |
607 | */ | |
4d57b86d | 608 | int f2fs_do_add_link(struct inode *dir, const struct qstr *name, |
675f10bd CY |
609 | struct inode *inode, nid_t ino, umode_t mode) |
610 | { | |
611 | struct fscrypt_name fname; | |
88c5c13a JK |
612 | struct page *page = NULL; |
613 | struct f2fs_dir_entry *de = NULL; | |
675f10bd CY |
614 | int err; |
615 | ||
616 | err = fscrypt_setup_filename(dir, name, 0, &fname); | |
617 | if (err) | |
618 | return err; | |
619 | ||
88c5c13a JK |
620 | /* |
621 | * An immature stakable filesystem shows a race condition between lookup | |
622 | * and create. If we have same task when doing lookup and create, it's | |
623 | * definitely fine as expected by VFS normally. Otherwise, let's just | |
624 | * verify on-disk dentry one more time, which guarantees filesystem | |
625 | * consistency more. | |
626 | */ | |
627 | if (current != F2FS_I(dir)->task) { | |
628 | de = __f2fs_find_entry(dir, &fname, &page); | |
629 | F2FS_I(dir)->task = NULL; | |
630 | } | |
631 | if (de) { | |
88c5c13a JK |
632 | f2fs_put_page(page, 0); |
633 | err = -EEXIST; | |
634 | } else if (IS_ERR(page)) { | |
635 | err = PTR_ERR(page); | |
636 | } else { | |
4d57b86d | 637 | err = f2fs_add_dentry(dir, &fname, inode, ino, mode); |
88c5c13a | 638 | } |
0b81d077 | 639 | fscrypt_free_filename(&fname); |
6b4ea016 JK |
640 | return err; |
641 | } | |
642 | ||
b97a9b5d JK |
643 | int f2fs_do_tmpfile(struct inode *inode, struct inode *dir) |
644 | { | |
645 | struct page *page; | |
646 | int err = 0; | |
647 | ||
648 | down_write(&F2FS_I(inode)->i_sem); | |
4d57b86d | 649 | page = f2fs_init_inode_metadata(inode, dir, NULL, NULL, NULL); |
b97a9b5d JK |
650 | if (IS_ERR(page)) { |
651 | err = PTR_ERR(page); | |
652 | goto fail; | |
653 | } | |
b97a9b5d JK |
654 | f2fs_put_page(page, 1); |
655 | ||
91942321 | 656 | clear_inode_flag(inode, FI_NEW_INODE); |
c75f2feb | 657 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
b97a9b5d JK |
658 | fail: |
659 | up_write(&F2FS_I(inode)->i_sem); | |
660 | return err; | |
661 | } | |
662 | ||
9f7c45cc | 663 | void f2fs_drop_nlink(struct inode *dir, struct inode *inode) |
dbeacf02 CY |
664 | { |
665 | struct f2fs_sb_info *sbi = F2FS_I_SB(dir); | |
666 | ||
667 | down_write(&F2FS_I(inode)->i_sem); | |
668 | ||
ee6d182f | 669 | if (S_ISDIR(inode->i_mode)) |
a1961246 | 670 | f2fs_i_links_write(dir, false); |
078cd827 | 671 | inode->i_ctime = current_time(inode); |
dbeacf02 | 672 | |
a1961246 | 673 | f2fs_i_links_write(inode, false); |
dbeacf02 | 674 | if (S_ISDIR(inode->i_mode)) { |
a1961246 | 675 | f2fs_i_links_write(inode, false); |
fc9581c8 | 676 | f2fs_i_size_write(inode, 0); |
dbeacf02 CY |
677 | } |
678 | up_write(&F2FS_I(inode)->i_sem); | |
dbeacf02 CY |
679 | |
680 | if (inode->i_nlink == 0) | |
4d57b86d | 681 | f2fs_add_orphan_inode(inode); |
dbeacf02 | 682 | else |
4d57b86d | 683 | f2fs_release_orphan_inode(sbi); |
dbeacf02 CY |
684 | } |
685 | ||
0a8165d7 | 686 | /* |
e1c42045 | 687 | * It only removes the dentry from the dentry page, corresponding name |
6b4ea016 JK |
688 | * entry in name page does not need to be touched during deletion. |
689 | */ | |
690 | void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page, | |
dbeacf02 | 691 | struct inode *dir, struct inode *inode) |
6b4ea016 JK |
692 | { |
693 | struct f2fs_dentry_block *dentry_blk; | |
694 | unsigned int bit_pos; | |
457d08ee | 695 | int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len)); |
6b4ea016 JK |
696 | int i; |
697 | ||
d0239e1b JK |
698 | f2fs_update_time(F2FS_I_SB(dir), REQ_TIME); |
699 | ||
63189b78 | 700 | if (F2FS_OPTION(F2FS_I_SB(dir)).fsync_mode == FSYNC_MODE_STRICT) |
4d57b86d | 701 | f2fs_add_ino_entry(F2FS_I_SB(dir), dir->i_ino, TRANS_DIR_INO); |
0a007b97 | 702 | |
622f28ae CY |
703 | if (f2fs_has_inline_dentry(dir)) |
704 | return f2fs_delete_inline_entry(dentry, page, dir, inode); | |
705 | ||
6b4ea016 | 706 | lock_page(page); |
bae0ee7a | 707 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
6b4ea016 | 708 | |
1c3bb978 GZ |
709 | dentry_blk = page_address(page); |
710 | bit_pos = dentry - dentry_blk->dentry; | |
6b4ea016 | 711 | for (i = 0; i < slots; i++) |
23380b85 | 712 | __clear_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap); |
6b4ea016 JK |
713 | |
714 | /* Let's check and deallocate this dentry page */ | |
715 | bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, | |
716 | NR_DENTRY_IN_BLOCK, | |
717 | 0); | |
6b4ea016 JK |
718 | set_page_dirty(page); |
719 | ||
078cd827 | 720 | dir->i_ctime = dir->i_mtime = current_time(dir); |
7c45729a | 721 | f2fs_mark_inode_dirty_sync(dir, false); |
6b4ea016 | 722 | |
dbeacf02 | 723 | if (inode) |
9f7c45cc | 724 | f2fs_drop_nlink(dir, inode); |
6b4ea016 | 725 | |
206e61be | 726 | if (bit_pos == NR_DENTRY_IN_BLOCK && |
4d57b86d | 727 | !f2fs_truncate_hole(dir, page->index, page->index + 1)) { |
5ec2d99d | 728 | f2fs_clear_page_cache_dirty_tag(page); |
6b4ea016 | 729 | clear_page_dirty_for_io(page); |
240a5915 | 730 | f2fs_clear_page_private(page); |
6b4ea016 | 731 | ClearPageUptodate(page); |
2baf0781 | 732 | clear_cold_data(page); |
a7ffdbe2 | 733 | inode_dec_dirty_pages(dir); |
4d57b86d | 734 | f2fs_remove_dirty_inode(dir); |
6b4ea016 | 735 | } |
508198be | 736 | f2fs_put_page(page, 1); |
6b4ea016 JK |
737 | } |
738 | ||
739 | bool f2fs_empty_dir(struct inode *dir) | |
740 | { | |
741 | unsigned long bidx; | |
742 | struct page *dentry_page; | |
743 | unsigned int bit_pos; | |
dbeacf02 | 744 | struct f2fs_dentry_block *dentry_blk; |
6b4ea016 JK |
745 | unsigned long nblock = dir_blocks(dir); |
746 | ||
622f28ae CY |
747 | if (f2fs_has_inline_dentry(dir)) |
748 | return f2fs_empty_inline_dir(dir); | |
749 | ||
6b4ea016 | 750 | for (bidx = 0; bidx < nblock; bidx++) { |
4d57b86d | 751 | dentry_page = f2fs_get_lock_data_page(dir, bidx, false); |
6b4ea016 JK |
752 | if (IS_ERR(dentry_page)) { |
753 | if (PTR_ERR(dentry_page) == -ENOENT) | |
754 | continue; | |
755 | else | |
756 | return false; | |
757 | } | |
758 | ||
bdbc90fa | 759 | dentry_blk = page_address(dentry_page); |
6b4ea016 JK |
760 | if (bidx == 0) |
761 | bit_pos = 2; | |
762 | else | |
763 | bit_pos = 0; | |
764 | bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap, | |
765 | NR_DENTRY_IN_BLOCK, | |
766 | bit_pos); | |
6b4ea016 JK |
767 | |
768 | f2fs_put_page(dentry_page, 1); | |
769 | ||
770 | if (bit_pos < NR_DENTRY_IN_BLOCK) | |
771 | return false; | |
772 | } | |
773 | return true; | |
774 | } | |
775 | ||
ed6bd4b1 | 776 | int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d, |
0b81d077 | 777 | unsigned int start_pos, struct fscrypt_str *fstr) |
38594de7 JK |
778 | { |
779 | unsigned char d_type = DT_UNKNOWN; | |
780 | unsigned int bit_pos; | |
781 | struct f2fs_dir_entry *de = NULL; | |
0b81d077 | 782 | struct fscrypt_str de_name = FSTR_INIT(NULL, 0); |
f6df8f23 | 783 | struct f2fs_sb_info *sbi = F2FS_I_SB(d->inode); |
e1293bdf CY |
784 | struct blk_plug plug; |
785 | bool readdir_ra = sbi->readdir_ra == 1; | |
786 | int err = 0; | |
38594de7 | 787 | |
7b3cd7d6 | 788 | bit_pos = ((unsigned long)ctx->pos % d->max); |
38594de7 | 789 | |
e1293bdf CY |
790 | if (readdir_ra) |
791 | blk_start_plug(&plug); | |
792 | ||
7b3cd7d6 JK |
793 | while (bit_pos < d->max) { |
794 | bit_pos = find_next_bit_le(d->bitmap, d->max, bit_pos); | |
795 | if (bit_pos >= d->max) | |
38594de7 JK |
796 | break; |
797 | ||
7b3cd7d6 | 798 | de = &d->dentry[bit_pos]; |
7d9dfa1d JK |
799 | if (de->name_len == 0) { |
800 | bit_pos++; | |
801 | ctx->pos = start_pos + bit_pos; | |
ddf06b75 CY |
802 | printk_ratelimited( |
803 | "%s, invalid namelen(0), ino:%u, run fsck to fix.", | |
804 | KERN_WARNING, le32_to_cpu(de->ino)); | |
805 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
7d9dfa1d JK |
806 | continue; |
807 | } | |
808 | ||
4d57b86d | 809 | d_type = f2fs_get_de_type(de); |
d8c6822a | 810 | |
d8c6822a JK |
811 | de_name.name = d->filename[bit_pos]; |
812 | de_name.len = le16_to_cpu(de->name_len); | |
813 | ||
4e240d1b JK |
814 | /* check memory boundary before moving forward */ |
815 | bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len)); | |
720db068 SY |
816 | if (unlikely(bit_pos > d->max || |
817 | le16_to_cpu(de->name_len) > F2FS_NAME_LEN)) { | |
dcbb4c10 JP |
818 | f2fs_warn(sbi, "%s: corrupted namelen=%d, run fsck to fix.", |
819 | __func__, le16_to_cpu(de->name_len)); | |
4e240d1b JK |
820 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
821 | err = -EINVAL; | |
822 | goto out; | |
823 | } | |
824 | ||
62230e0d | 825 | if (IS_ENCRYPTED(d->inode)) { |
d8c6822a | 826 | int save_len = fstr->len; |
d8c6822a | 827 | |
ef1eb3aa | 828 | err = fscrypt_fname_disk_to_usr(d->inode, |
36af5f40 CY |
829 | (u32)le32_to_cpu(de->hash_code), |
830 | 0, &de_name, fstr); | |
ef1eb3aa | 831 | if (err) |
e1293bdf | 832 | goto out; |
569cf187 JK |
833 | |
834 | de_name = *fstr; | |
835 | fstr->len = save_len; | |
d8c6822a JK |
836 | } |
837 | ||
838 | if (!dir_emit(ctx, de_name.name, de_name.len, | |
e1293bdf CY |
839 | le32_to_cpu(de->ino), d_type)) { |
840 | err = 1; | |
841 | goto out; | |
842 | } | |
38594de7 | 843 | |
e1293bdf | 844 | if (readdir_ra) |
4d57b86d | 845 | f2fs_ra_node_page(sbi, le32_to_cpu(de->ino)); |
f6df8f23 | 846 | |
38594de7 JK |
847 | ctx->pos = start_pos + bit_pos; |
848 | } | |
e1293bdf CY |
849 | out: |
850 | if (readdir_ra) | |
851 | blk_finish_plug(&plug); | |
852 | return err; | |
38594de7 JK |
853 | } |
854 | ||
6f7f231e | 855 | static int f2fs_readdir(struct file *file, struct dir_context *ctx) |
6b4ea016 | 856 | { |
496ad9aa | 857 | struct inode *inode = file_inode(file); |
6b4ea016 | 858 | unsigned long npages = dir_blocks(inode); |
6b4ea016 | 859 | struct f2fs_dentry_block *dentry_blk = NULL; |
6b4ea016 | 860 | struct page *dentry_page = NULL; |
817202d9 | 861 | struct file_ra_state *ra = &file->f_ra; |
e97a3c4c | 862 | loff_t start_pos = ctx->pos; |
6f7f231e | 863 | unsigned int n = ((unsigned long)ctx->pos / NR_DENTRY_IN_BLOCK); |
7b3cd7d6 | 864 | struct f2fs_dentry_ptr d; |
0b81d077 | 865 | struct fscrypt_str fstr = FSTR_INIT(NULL, 0); |
d8c6822a | 866 | int err = 0; |
6b4ea016 | 867 | |
62230e0d | 868 | if (IS_ENCRYPTED(inode)) { |
0b81d077 | 869 | err = fscrypt_get_encryption_info(inode); |
8074bb51 | 870 | if (err && err != -ENOKEY) |
e97a3c4c | 871 | goto out; |
26bf3dc7 | 872 | |
0b81d077 | 873 | err = fscrypt_fname_alloc_buffer(inode, F2FS_NAME_LEN, &fstr); |
d8c6822a | 874 | if (err < 0) |
e97a3c4c | 875 | goto out; |
d8c6822a JK |
876 | } |
877 | ||
878 | if (f2fs_has_inline_dentry(inode)) { | |
879 | err = f2fs_read_inline_dir(file, ctx, &fstr); | |
e97a3c4c | 880 | goto out_free; |
d8c6822a | 881 | } |
622f28ae | 882 | |
ab383be5 | 883 | for (; n < npages; n++, ctx->pos = n * NR_DENTRY_IN_BLOCK) { |
4414dea8 CY |
884 | |
885 | /* allow readdir() to be interrupted */ | |
886 | if (fatal_signal_pending(current)) { | |
887 | err = -ERESTARTSYS; | |
888 | goto out_free; | |
889 | } | |
890 | cond_resched(); | |
891 | ||
cb7a8448 CY |
892 | /* readahead for multi pages of dir */ |
893 | if (npages - n > 1 && !ra_has_index(ra, n)) | |
894 | page_cache_sync_readahead(inode->i_mapping, ra, file, n, | |
895 | min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES)); | |
896 | ||
613f3dcd | 897 | dentry_page = f2fs_find_data_page(inode, n); |
57b62d29 CY |
898 | if (IS_ERR(dentry_page)) { |
899 | err = PTR_ERR(dentry_page); | |
ed6bd4b1 CY |
900 | if (err == -ENOENT) { |
901 | err = 0; | |
57b62d29 | 902 | continue; |
ed6bd4b1 | 903 | } else { |
e97a3c4c | 904 | goto out_free; |
ed6bd4b1 | 905 | } |
57b62d29 | 906 | } |
6b4ea016 | 907 | |
bdbc90fa | 908 | dentry_blk = page_address(dentry_page); |
99b072bb | 909 | |
64c24ecb | 910 | make_dentry_ptr_block(inode, &d, dentry_blk); |
7b3cd7d6 | 911 | |
ed6bd4b1 CY |
912 | err = f2fs_fill_dentries(ctx, &d, |
913 | n * NR_DENTRY_IN_BLOCK, &fstr); | |
914 | if (err) { | |
613f3dcd | 915 | f2fs_put_page(dentry_page, 0); |
e9837bc2 CY |
916 | break; |
917 | } | |
38594de7 | 918 | |
613f3dcd | 919 | f2fs_put_page(dentry_page, 0); |
6b4ea016 | 920 | } |
e97a3c4c | 921 | out_free: |
0b81d077 | 922 | fscrypt_fname_free_buffer(&fstr); |
e97a3c4c CY |
923 | out: |
924 | trace_f2fs_readdir(inode, start_pos, ctx->pos, err); | |
ed6bd4b1 | 925 | return err < 0 ? err : 0; |
6b4ea016 JK |
926 | } |
927 | ||
ed3360ab CY |
928 | static int f2fs_dir_open(struct inode *inode, struct file *filp) |
929 | { | |
62230e0d | 930 | if (IS_ENCRYPTED(inode)) |
0b81d077 | 931 | return fscrypt_get_encryption_info(inode) ? -EACCES : 0; |
ed3360ab CY |
932 | return 0; |
933 | } | |
934 | ||
6b4ea016 JK |
935 | const struct file_operations f2fs_dir_operations = { |
936 | .llseek = generic_file_llseek, | |
937 | .read = generic_read_dir, | |
e77d0c63 | 938 | .iterate_shared = f2fs_readdir, |
6b4ea016 | 939 | .fsync = f2fs_sync_file, |
ed3360ab | 940 | .open = f2fs_dir_open, |
6b4ea016 | 941 | .unlocked_ioctl = f2fs_ioctl, |
08b95126 | 942 | #ifdef CONFIG_COMPAT |
943 | .compat_ioctl = f2fs_compat_ioctl, | |
944 | #endif | |
6b4ea016 | 945 | }; |