1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * fs/f2fs/namei.c |
4 | * |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
6 | * http://www.samsung.com/ |
7 | */ |
8 | #include <linux/fs.h> |
9 | #include <linux/f2fs_fs.h> |
10 | #include <linux/pagemap.h> |
11 | #include <linux/sched.h> |
12 | #include <linux/ctype.h> |
13 | #include <linux/random.h> |
14 | #include <linux/dcache.h> |
15 | #include <linux/namei.h> |
16 | #include <linux/quotaops.h> |
17 | |
18 | #include "f2fs.h" |
19 | #include "node.h" |
20 | #include "segment.h" |
21 | #include "xattr.h" |
22 | #include "acl.h" |
23 | #include <trace/events/f2fs.h> |
24 | |
25 | static inline bool is_extension_exist(const unsigned char *s, const char *sub, |
26 | bool tmp_ext, bool tmp_dot) |
27 | { |
28 | size_t slen = strlen(s); |
29 | size_t sublen = strlen(sub); |
30 | int i; |
31 | |
32 | if (sublen == 1 && *sub == '*') |
33 | return true; |
34 | |
35 | /* |
36 | * filename format of multimedia file should be defined as: |
37 | * "filename + '.' + extension + (optional: '.' + temp extension)". |
38 | */ |
39 | if (slen < sublen + 2) |
40 | return false; |
41 | |
42 | if (!tmp_ext) { |
43 | /* file has no temp extension */ |
44 | if (s[slen - sublen - 1] != '.') |
45 | return false; |
46 | return !strncasecmp(s1: s + slen - sublen, s2: sub, n: sublen); |
47 | } |
48 | |
49 | for (i = 1; i < slen - sublen; i++) { |
50 | if (s[i] != '.') |
51 | continue; |
52 | if (!strncasecmp(s1: s + i + 1, s2: sub, n: sublen)) { |
53 | if (!tmp_dot) |
54 | return true; |
55 | if (i == slen - sublen - 1 || s[i + 1 + sublen] == '.') |
56 | return true; |
57 | } |
58 | } |
59 | |
60 | return false; |
61 | } |
62 | |
63 | static inline bool is_temperature_extension(const unsigned char *s, const char *sub) |
64 | { |
65 | return is_extension_exist(s, sub, tmp_ext: true, tmp_dot: false); |
66 | } |
67 | |
68 | static inline bool is_compress_extension(const unsigned char *s, const char *sub) |
69 | { |
70 | return is_extension_exist(s, sub, tmp_ext: true, tmp_dot: true); |
71 | } |
72 | |
73 | int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name, |
74 | bool hot, bool set) |
75 | { |
76 | __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; |
77 | int cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
78 | int hot_count = sbi->raw_super->hot_ext_count; |
79 | int total_count = cold_count + hot_count; |
80 | int start, count; |
81 | int i; |
82 | |
83 | if (set) { |
84 | if (total_count == F2FS_MAX_EXTENSION) |
85 | return -EINVAL; |
86 | } else { |
87 | if (!hot && !cold_count) |
88 | return -EINVAL; |
89 | if (hot && !hot_count) |
90 | return -EINVAL; |
91 | } |
92 | |
93 | if (hot) { |
94 | start = cold_count; |
95 | count = total_count; |
96 | } else { |
97 | start = 0; |
98 | count = cold_count; |
99 | } |
100 | |
101 | for (i = start; i < count; i++) { |
102 | if (strcmp(name, extlist[i])) |
103 | continue; |
104 | |
105 | if (set) |
106 | return -EINVAL; |
107 | |
108 | memcpy(extlist[i], extlist[i + 1], |
109 | F2FS_EXTENSION_LEN * (total_count - i - 1)); |
110 | memset(extlist[total_count - 1], 0, F2FS_EXTENSION_LEN); |
111 | if (hot) |
112 | sbi->raw_super->hot_ext_count = hot_count - 1; |
113 | else |
114 | sbi->raw_super->extension_count = |
115 | cpu_to_le32(cold_count - 1); |
116 | return 0; |
117 | } |
118 | |
119 | if (!set) |
120 | return -EINVAL; |
121 | |
122 | if (hot) { |
123 | memcpy(extlist[count], name, strlen(name)); |
124 | sbi->raw_super->hot_ext_count = hot_count + 1; |
125 | } else { |
126 | char buf[F2FS_MAX_EXTENSION][F2FS_EXTENSION_LEN]; |
127 | |
128 | memcpy(buf, &extlist[cold_count], |
129 | F2FS_EXTENSION_LEN * hot_count); |
130 | memset(extlist[cold_count], 0, F2FS_EXTENSION_LEN); |
131 | memcpy(extlist[cold_count], name, strlen(name)); |
132 | memcpy(&extlist[cold_count + 1], buf, |
133 | F2FS_EXTENSION_LEN * hot_count); |
134 | sbi->raw_super->extension_count = cpu_to_le32(cold_count + 1); |
135 | } |
136 | return 0; |
137 | } |
138 | |
139 | static void set_compress_new_inode(struct f2fs_sb_info *sbi, struct inode *dir, |
140 | struct inode *inode, const unsigned char *name) |
141 | { |
142 | __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; |
143 | unsigned char (*noext)[F2FS_EXTENSION_LEN] = |
144 | F2FS_OPTION(sbi).noextensions; |
145 | unsigned char (*ext)[F2FS_EXTENSION_LEN] = F2FS_OPTION(sbi).extensions; |
146 | unsigned char ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt; |
147 | unsigned char noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt; |
148 | int i, cold_count, hot_count; |
149 | |
150 | if (!f2fs_sb_has_compression(sbi)) |
151 | return; |
152 | |
153 | if (S_ISDIR(inode->i_mode)) |
154 | goto inherit_comp; |
155 | |
156 | /* This name comes only from normal files. */ |
157 | if (!name) |
158 | return; |
159 | |
160 | /* Don't compress hot files. */ |
161 | f2fs_down_read(sem: &sbi->sb_lock); |
162 | cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
163 | hot_count = sbi->raw_super->hot_ext_count; |
164 | for (i = cold_count; i < cold_count + hot_count; i++) |
165 | if (is_temperature_extension(s: name, sub: extlist[i])) |
166 | break; |
167 | f2fs_up_read(sem: &sbi->sb_lock); |
168 | if (i < (cold_count + hot_count)) |
169 | return; |
170 | |
171 | /* Don't compress unallowed extension. */ |
172 | for (i = 0; i < noext_cnt; i++) |
173 | if (is_compress_extension(s: name, sub: noext[i])) |
174 | return; |
175 | |
176 | /* Compress wanting extension. */ |
177 | for (i = 0; i < ext_cnt; i++) { |
178 | if (is_compress_extension(s: name, sub: ext[i])) { |
179 | set_compress_context(inode); |
180 | return; |
181 | } |
182 | } |
183 | inherit_comp: |
184 | /* Inherit the {no-}compression flag in directory */ |
185 | if (F2FS_I(inode: dir)->i_flags & F2FS_NOCOMP_FL) { |
186 | F2FS_I(inode)->i_flags |= F2FS_NOCOMP_FL; |
187 | f2fs_mark_inode_dirty_sync(inode, sync: true); |
188 | } else if (F2FS_I(inode: dir)->i_flags & F2FS_COMPR_FL) { |
189 | set_compress_context(inode); |
190 | } |
191 | } |
192 | |
193 | /* |
194 | * Set file's temperature for hot/cold data separation |
195 | */ |
196 | static void set_file_temperature(struct f2fs_sb_info *sbi, struct inode *inode, |
197 | const unsigned char *name) |
198 | { |
199 | __u8 (*extlist)[F2FS_EXTENSION_LEN] = sbi->raw_super->extension_list; |
200 | int i, cold_count, hot_count; |
201 | |
202 | f2fs_down_read(sem: &sbi->sb_lock); |
203 | cold_count = le32_to_cpu(sbi->raw_super->extension_count); |
204 | hot_count = sbi->raw_super->hot_ext_count; |
205 | for (i = 0; i < cold_count + hot_count; i++) |
206 | if (is_temperature_extension(s: name, sub: extlist[i])) |
207 | break; |
208 | f2fs_up_read(sem: &sbi->sb_lock); |
209 | |
210 | if (i == cold_count + hot_count) |
211 | return; |
212 | |
213 | if (i < cold_count) |
214 | file_set_cold(inode); |
215 | else |
216 | file_set_hot(inode); |
217 | } |
218 | |
219 | static struct inode *f2fs_new_inode(struct mnt_idmap *idmap, |
220 | struct inode *dir, umode_t mode, |
221 | const char *name) |
222 | { |
223 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
224 | nid_t ino; |
225 | struct inode *inode; |
226 | bool nid_free = false; |
227 | bool encrypt = false; |
228 | int xattr_size = 0; |
229 | int err; |
230 | |
231 | inode = new_inode(sb: dir->i_sb); |
232 | if (!inode) |
233 | return ERR_PTR(error: -ENOMEM); |
234 | |
235 | if (!f2fs_alloc_nid(sbi, nid: &ino)) { |
236 | err = -ENOSPC; |
237 | goto fail; |
238 | } |
239 | |
240 | nid_free = true; |
241 | |
242 | inode_init_owner(idmap, inode, dir, mode); |
243 | |
244 | inode->i_ino = ino; |
245 | inode->i_blocks = 0; |
246 | simple_inode_init_ts(inode); |
247 | F2FS_I(inode)->i_crtime = inode_get_mtime(inode); |
248 | inode->i_generation = get_random_u32(); |
249 | |
250 | if (S_ISDIR(inode->i_mode)) |
251 | F2FS_I(inode)->i_current_depth = 1; |
252 | |
253 | err = insert_inode_locked(inode); |
254 | if (err) { |
255 | err = -EINVAL; |
256 | goto fail; |
257 | } |
258 | |
259 | if (f2fs_sb_has_project_quota(sbi) && |
260 | (F2FS_I(inode: dir)->i_flags & F2FS_PROJINHERIT_FL)) |
261 | F2FS_I(inode)->i_projid = F2FS_I(inode: dir)->i_projid; |
262 | else |
263 | F2FS_I(inode)->i_projid = make_kprojid(from: &init_user_ns, |
264 | F2FS_DEF_PROJID); |
265 | |
266 | err = fscrypt_prepare_new_inode(dir, inode, encrypt_ret: &encrypt); |
267 | if (err) |
268 | goto fail_drop; |
269 | |
270 | err = f2fs_dquot_initialize(inode); |
271 | if (err) |
272 | goto fail_drop; |
273 | |
274 | set_inode_flag(inode, flag: FI_NEW_INODE); |
275 | |
276 | if (encrypt) |
277 | f2fs_set_encrypted_inode(inode); |
278 | |
279 | if (f2fs_sb_has_extra_attr(sbi)) { |
280 | set_inode_flag(inode, flag: FI_EXTRA_ATTR); |
281 | F2FS_I(inode)->i_extra_isize = F2FS_TOTAL_EXTRA_ATTR_SIZE; |
282 | } |
283 | |
284 | if (test_opt(sbi, INLINE_XATTR)) |
285 | set_inode_flag(inode, flag: FI_INLINE_XATTR); |
286 | |
287 | if (f2fs_may_inline_dentry(inode)) |
288 | set_inode_flag(inode, flag: FI_INLINE_DENTRY); |
289 | |
290 | if (f2fs_sb_has_flexible_inline_xattr(sbi)) { |
291 | f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode)); |
292 | if (f2fs_has_inline_xattr(inode)) |
293 | xattr_size = F2FS_OPTION(sbi).inline_xattr_size; |
294 | /* Otherwise, will be 0 */ |
295 | } else if (f2fs_has_inline_xattr(inode) || |
296 | f2fs_has_inline_dentry(inode)) { |
297 | xattr_size = DEFAULT_INLINE_XATTR_ADDRS; |
298 | } |
299 | F2FS_I(inode)->i_inline_xattr_size = xattr_size; |
300 | |
301 | F2FS_I(inode)->i_flags = |
302 | f2fs_mask_flags(mode, flags: F2FS_I(inode: dir)->i_flags & F2FS_FL_INHERITED); |
303 | |
304 | if (S_ISDIR(inode->i_mode)) |
305 | F2FS_I(inode)->i_flags |= F2FS_INDEX_FL; |
306 | |
307 | if (F2FS_I(inode)->i_flags & F2FS_PROJINHERIT_FL) |
308 | set_inode_flag(inode, flag: FI_PROJ_INHERIT); |
309 | |
310 | /* Check compression first. */ |
311 | set_compress_new_inode(sbi, dir, inode, name); |
312 | |
313 | /* Should enable inline_data after compression set */ |
314 | if (test_opt(sbi, INLINE_DATA) && f2fs_may_inline_data(inode)) |
315 | set_inode_flag(inode, flag: FI_INLINE_DATA); |
316 | |
317 | if (name && !test_opt(sbi, DISABLE_EXT_IDENTIFY)) |
318 | set_file_temperature(sbi, inode, name); |
319 | |
320 | stat_inc_inline_xattr(inode); |
321 | stat_inc_inline_inode(inode); |
322 | stat_inc_inline_dir(inode); |
323 | |
324 | f2fs_set_inode_flags(inode); |
325 | |
326 | f2fs_init_extent_tree(inode); |
327 | |
328 | trace_f2fs_new_inode(inode, ret: 0); |
329 | return inode; |
330 | |
331 | fail: |
332 | trace_f2fs_new_inode(inode, ret: err); |
333 | make_bad_inode(inode); |
334 | if (nid_free) |
335 | set_inode_flag(inode, flag: FI_FREE_NID); |
336 | iput(inode); |
337 | return ERR_PTR(error: err); |
338 | fail_drop: |
339 | trace_f2fs_new_inode(inode, ret: err); |
340 | dquot_drop(inode); |
341 | inode->i_flags |= S_NOQUOTA; |
342 | if (nid_free) |
343 | set_inode_flag(inode, flag: FI_FREE_NID); |
344 | clear_nlink(inode); |
345 | unlock_new_inode(inode); |
346 | iput(inode); |
347 | return ERR_PTR(error: err); |
348 | } |
349 | |
350 | static int f2fs_create(struct mnt_idmap *idmap, struct inode *dir, |
351 | struct dentry *dentry, umode_t mode, bool excl) |
352 | { |
353 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
354 | struct inode *inode; |
355 | nid_t ino = 0; |
356 | int err; |
357 | |
358 | if (unlikely(f2fs_cp_error(sbi))) |
359 | return -EIO; |
360 | if (!f2fs_is_checkpoint_ready(sbi)) |
361 | return -ENOSPC; |
362 | |
363 | err = f2fs_dquot_initialize(inode: dir); |
364 | if (err) |
365 | return err; |
366 | |
367 | inode = f2fs_new_inode(idmap, dir, mode, name: dentry->d_name.name); |
368 | if (IS_ERR(ptr: inode)) |
369 | return PTR_ERR(ptr: inode); |
370 | |
371 | inode->i_op = &f2fs_file_inode_operations; |
372 | inode->i_fop = &f2fs_file_operations; |
373 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
374 | ino = inode->i_ino; |
375 | |
376 | f2fs_lock_op(sbi); |
377 | err = f2fs_add_link(dentry, inode); |
378 | if (err) |
379 | goto out; |
380 | f2fs_unlock_op(sbi); |
381 | |
382 | f2fs_alloc_nid_done(sbi, nid: ino); |
383 | |
384 | d_instantiate_new(dentry, inode); |
385 | |
386 | if (IS_DIRSYNC(dir)) |
387 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
388 | |
389 | f2fs_balance_fs(sbi, need: true); |
390 | return 0; |
391 | out: |
392 | f2fs_handle_failed_inode(inode); |
393 | return err; |
394 | } |
395 | |
396 | static int f2fs_link(struct dentry *old_dentry, struct inode *dir, |
397 | struct dentry *dentry) |
398 | { |
399 | struct inode *inode = d_inode(dentry: old_dentry); |
400 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
401 | int err; |
402 | |
403 | if (unlikely(f2fs_cp_error(sbi))) |
404 | return -EIO; |
405 | if (!f2fs_is_checkpoint_ready(sbi)) |
406 | return -ENOSPC; |
407 | |
408 | err = fscrypt_prepare_link(old_dentry, dir, dentry); |
409 | if (err) |
410 | return err; |
411 | |
412 | if (is_inode_flag_set(inode: dir, flag: FI_PROJ_INHERIT) && |
413 | (!projid_eq(left: F2FS_I(inode: dir)->i_projid, |
414 | right: F2FS_I(inode: old_dentry->d_inode)->i_projid))) |
415 | return -EXDEV; |
416 | |
417 | err = f2fs_dquot_initialize(inode: dir); |
418 | if (err) |
419 | return err; |
420 | |
421 | f2fs_balance_fs(sbi, need: true); |
422 | |
423 | inode_set_ctime_current(inode); |
424 | ihold(inode); |
425 | |
426 | set_inode_flag(inode, flag: FI_INC_LINK); |
427 | f2fs_lock_op(sbi); |
428 | err = f2fs_add_link(dentry, inode); |
429 | if (err) |
430 | goto out; |
431 | f2fs_unlock_op(sbi); |
432 | |
433 | d_instantiate(dentry, inode); |
434 | |
435 | if (IS_DIRSYNC(dir)) |
436 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
437 | return 0; |
438 | out: |
439 | clear_inode_flag(inode, flag: FI_INC_LINK); |
440 | iput(inode); |
441 | f2fs_unlock_op(sbi); |
442 | return err; |
443 | } |
444 | |
445 | struct dentry *f2fs_get_parent(struct dentry *child) |
446 | { |
447 | struct page *page; |
448 | unsigned long ino = f2fs_inode_by_name(dir: d_inode(dentry: child), qstr: &dotdot_name, page: &page); |
449 | |
450 | if (!ino) { |
451 | if (IS_ERR(ptr: page)) |
452 | return ERR_CAST(ptr: page); |
453 | return ERR_PTR(error: -ENOENT); |
454 | } |
455 | return d_obtain_alias(f2fs_iget(sb: child->d_sb, ino)); |
456 | } |
457 | |
458 | static int __recover_dot_dentries(struct inode *dir, nid_t pino) |
459 | { |
460 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
461 | struct qstr dot = QSTR_INIT("." , 1); |
462 | struct qstr dotdot = QSTR_INIT(".." , 2); |
463 | struct f2fs_dir_entry *de; |
464 | struct page *page; |
465 | int err = 0; |
466 | |
467 | if (f2fs_readonly(sb: sbi->sb)) { |
468 | f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint" , |
469 | dir->i_ino, pino); |
470 | return 0; |
471 | } |
472 | |
473 | if (!S_ISDIR(dir->i_mode)) { |
474 | f2fs_err(sbi, "inconsistent inode status, skip recovering inline_dots inode (ino:%lu, i_mode:%u, pino:%u)" , |
475 | dir->i_ino, dir->i_mode, pino); |
476 | set_sbi_flag(sbi, type: SBI_NEED_FSCK); |
477 | return -ENOTDIR; |
478 | } |
479 | |
480 | err = f2fs_dquot_initialize(inode: dir); |
481 | if (err) |
482 | return err; |
483 | |
484 | f2fs_balance_fs(sbi, need: true); |
485 | |
486 | f2fs_lock_op(sbi); |
487 | |
488 | de = f2fs_find_entry(dir, child: &dot, res_page: &page); |
489 | if (de) { |
490 | f2fs_put_page(page, unlock: 0); |
491 | } else if (IS_ERR(ptr: page)) { |
492 | err = PTR_ERR(ptr: page); |
493 | goto out; |
494 | } else { |
495 | err = f2fs_do_add_link(dir, name: &dot, NULL, ino: dir->i_ino, S_IFDIR); |
496 | if (err) |
497 | goto out; |
498 | } |
499 | |
500 | de = f2fs_find_entry(dir, child: &dotdot, res_page: &page); |
501 | if (de) |
502 | f2fs_put_page(page, unlock: 0); |
503 | else if (IS_ERR(ptr: page)) |
504 | err = PTR_ERR(ptr: page); |
505 | else |
506 | err = f2fs_do_add_link(dir, name: &dotdot, NULL, ino: pino, S_IFDIR); |
507 | out: |
508 | if (!err) |
509 | clear_inode_flag(inode: dir, flag: FI_INLINE_DOTS); |
510 | |
511 | f2fs_unlock_op(sbi); |
512 | return err; |
513 | } |
514 | |
515 | static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, |
516 | unsigned int flags) |
517 | { |
518 | struct inode *inode = NULL; |
519 | struct f2fs_dir_entry *de; |
520 | struct page *page; |
521 | struct dentry *new; |
522 | nid_t ino = -1; |
523 | int err = 0; |
524 | unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir)); |
525 | struct f2fs_filename fname; |
526 | |
527 | trace_f2fs_lookup_start(dir, dentry, flags); |
528 | |
529 | if (dentry->d_name.len > F2FS_NAME_LEN) { |
530 | err = -ENAMETOOLONG; |
531 | goto out; |
532 | } |
533 | |
534 | err = f2fs_prepare_lookup(dir, dentry, fname: &fname); |
535 | generic_set_encrypted_ci_d_ops(dentry); |
536 | if (err == -ENOENT) |
537 | goto out_splice; |
538 | if (err) |
539 | goto out; |
540 | de = __f2fs_find_entry(dir, fname: &fname, res_page: &page); |
541 | f2fs_free_filename(fname: &fname); |
542 | |
543 | if (!de) { |
544 | if (IS_ERR(ptr: page)) { |
545 | err = PTR_ERR(ptr: page); |
546 | goto out; |
547 | } |
548 | err = -ENOENT; |
549 | goto out_splice; |
550 | } |
551 | |
552 | ino = le32_to_cpu(de->ino); |
553 | f2fs_put_page(page, unlock: 0); |
554 | |
555 | inode = f2fs_iget(sb: dir->i_sb, ino); |
556 | if (IS_ERR(ptr: inode)) { |
557 | err = PTR_ERR(ptr: inode); |
558 | goto out; |
559 | } |
560 | |
561 | if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(inode: dir)) { |
562 | err = __recover_dot_dentries(dir, pino: root_ino); |
563 | if (err) |
564 | goto out_iput; |
565 | } |
566 | |
567 | if (f2fs_has_inline_dots(inode)) { |
568 | err = __recover_dot_dentries(dir: inode, pino: dir->i_ino); |
569 | if (err) |
570 | goto out_iput; |
571 | } |
572 | if (IS_ENCRYPTED(dir) && |
573 | (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) && |
574 | !fscrypt_has_permitted_context(parent: dir, child: inode)) { |
575 | f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu" , |
576 | dir->i_ino, inode->i_ino); |
577 | err = -EPERM; |
578 | goto out_iput; |
579 | } |
580 | out_splice: |
581 | #if IS_ENABLED(CONFIG_UNICODE) |
582 | if (!inode && IS_CASEFOLDED(dir)) { |
583 | /* Eventually we want to call d_add_ci(dentry, NULL) |
584 | * for negative dentries in the encoding case as |
585 | * well. For now, prevent the negative dentry |
586 | * from being cached. |
587 | */ |
588 | trace_f2fs_lookup_end(dir, dentry, ino, err); |
589 | return NULL; |
590 | } |
591 | #endif |
592 | new = d_splice_alias(inode, dentry); |
593 | trace_f2fs_lookup_end(dir, dentry: !IS_ERR_OR_NULL(ptr: new) ? new : dentry, |
594 | ino, err: IS_ERR(ptr: new) ? PTR_ERR(ptr: new) : err); |
595 | return new; |
596 | out_iput: |
597 | iput(inode); |
598 | out: |
599 | trace_f2fs_lookup_end(dir, dentry, ino, err); |
600 | return ERR_PTR(error: err); |
601 | } |
602 | |
603 | static int f2fs_unlink(struct inode *dir, struct dentry *dentry) |
604 | { |
605 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
606 | struct inode *inode = d_inode(dentry); |
607 | struct f2fs_dir_entry *de; |
608 | struct page *page; |
609 | int err; |
610 | |
611 | trace_f2fs_unlink_enter(dir, dentry); |
612 | |
613 | if (unlikely(f2fs_cp_error(sbi))) { |
614 | err = -EIO; |
615 | goto fail; |
616 | } |
617 | |
618 | err = f2fs_dquot_initialize(inode: dir); |
619 | if (err) |
620 | goto fail; |
621 | err = f2fs_dquot_initialize(inode); |
622 | if (err) |
623 | goto fail; |
624 | |
625 | de = f2fs_find_entry(dir, child: &dentry->d_name, res_page: &page); |
626 | if (!de) { |
627 | if (IS_ERR(ptr: page)) |
628 | err = PTR_ERR(ptr: page); |
629 | goto fail; |
630 | } |
631 | |
632 | f2fs_balance_fs(sbi, need: true); |
633 | |
634 | f2fs_lock_op(sbi); |
635 | err = f2fs_acquire_orphan_inode(sbi); |
636 | if (err) { |
637 | f2fs_unlock_op(sbi); |
638 | f2fs_put_page(page, unlock: 0); |
639 | goto fail; |
640 | } |
641 | f2fs_delete_entry(dentry: de, page, dir, inode); |
642 | f2fs_unlock_op(sbi); |
643 | |
644 | #if IS_ENABLED(CONFIG_UNICODE) |
645 | /* VFS negative dentries are incompatible with Encoding and |
646 | * Case-insensitiveness. Eventually we'll want avoid |
647 | * invalidating the dentries here, alongside with returning the |
648 | * negative dentries at f2fs_lookup(), when it is better |
649 | * supported by the VFS for the CI case. |
650 | */ |
651 | if (IS_CASEFOLDED(dir)) |
652 | d_invalidate(dentry); |
653 | #endif |
654 | if (IS_DIRSYNC(dir)) |
655 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
656 | fail: |
657 | trace_f2fs_unlink_exit(inode, ret: err); |
658 | return err; |
659 | } |
660 | |
661 | static const char *f2fs_get_link(struct dentry *dentry, |
662 | struct inode *inode, |
663 | struct delayed_call *done) |
664 | { |
665 | const char *link = page_get_link(dentry, inode, done); |
666 | |
667 | if (!IS_ERR(ptr: link) && !*link) { |
668 | /* this is broken symlink case */ |
669 | do_delayed_call(call: done); |
670 | clear_delayed_call(call: done); |
671 | link = ERR_PTR(error: -ENOENT); |
672 | } |
673 | return link; |
674 | } |
675 | |
676 | static int f2fs_symlink(struct mnt_idmap *idmap, struct inode *dir, |
677 | struct dentry *dentry, const char *symname) |
678 | { |
679 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
680 | struct inode *inode; |
681 | size_t len = strlen(symname); |
682 | struct fscrypt_str disk_link; |
683 | int err; |
684 | |
685 | if (unlikely(f2fs_cp_error(sbi))) |
686 | return -EIO; |
687 | if (!f2fs_is_checkpoint_ready(sbi)) |
688 | return -ENOSPC; |
689 | |
690 | err = fscrypt_prepare_symlink(dir, target: symname, len, max_len: dir->i_sb->s_blocksize, |
691 | disk_link: &disk_link); |
692 | if (err) |
693 | return err; |
694 | |
695 | err = f2fs_dquot_initialize(inode: dir); |
696 | if (err) |
697 | return err; |
698 | |
699 | inode = f2fs_new_inode(idmap, dir, S_IFLNK | S_IRWXUGO, NULL); |
700 | if (IS_ERR(ptr: inode)) |
701 | return PTR_ERR(ptr: inode); |
702 | |
703 | if (IS_ENCRYPTED(inode)) |
704 | inode->i_op = &f2fs_encrypted_symlink_inode_operations; |
705 | else |
706 | inode->i_op = &f2fs_symlink_inode_operations; |
707 | inode_nohighmem(inode); |
708 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
709 | |
710 | f2fs_lock_op(sbi); |
711 | err = f2fs_add_link(dentry, inode); |
712 | if (err) |
713 | goto out_f2fs_handle_failed_inode; |
714 | f2fs_unlock_op(sbi); |
715 | f2fs_alloc_nid_done(sbi, nid: inode->i_ino); |
716 | |
717 | err = fscrypt_encrypt_symlink(inode, target: symname, len, disk_link: &disk_link); |
718 | if (err) |
719 | goto err_out; |
720 | |
721 | err = page_symlink(inode, symname: disk_link.name, len: disk_link.len); |
722 | |
723 | err_out: |
724 | d_instantiate_new(dentry, inode); |
725 | |
726 | /* |
727 | * Let's flush symlink data in order to avoid broken symlink as much as |
728 | * possible. Nevertheless, fsyncing is the best way, but there is no |
729 | * way to get a file descriptor in order to flush that. |
730 | * |
731 | * Note that, it needs to do dir->fsync to make this recoverable. |
732 | * If the symlink path is stored into inline_data, there is no |
733 | * performance regression. |
734 | */ |
735 | if (!err) { |
736 | filemap_write_and_wait_range(mapping: inode->i_mapping, lstart: 0, |
737 | lend: disk_link.len - 1); |
738 | |
739 | if (IS_DIRSYNC(dir)) |
740 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
741 | } else { |
742 | f2fs_unlink(dir, dentry); |
743 | } |
744 | |
745 | f2fs_balance_fs(sbi, need: true); |
746 | goto out_free_encrypted_link; |
747 | |
748 | out_f2fs_handle_failed_inode: |
749 | f2fs_handle_failed_inode(inode); |
750 | out_free_encrypted_link: |
751 | if (disk_link.name != (unsigned char *)symname) |
752 | kfree(objp: disk_link.name); |
753 | return err; |
754 | } |
755 | |
756 | static int f2fs_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
757 | struct dentry *dentry, umode_t mode) |
758 | { |
759 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
760 | struct inode *inode; |
761 | int err; |
762 | |
763 | if (unlikely(f2fs_cp_error(sbi))) |
764 | return -EIO; |
765 | |
766 | err = f2fs_dquot_initialize(inode: dir); |
767 | if (err) |
768 | return err; |
769 | |
770 | inode = f2fs_new_inode(idmap, dir, S_IFDIR | mode, NULL); |
771 | if (IS_ERR(ptr: inode)) |
772 | return PTR_ERR(ptr: inode); |
773 | |
774 | inode->i_op = &f2fs_dir_inode_operations; |
775 | inode->i_fop = &f2fs_dir_operations; |
776 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
777 | mapping_set_gfp_mask(m: inode->i_mapping, GFP_NOFS); |
778 | |
779 | set_inode_flag(inode, flag: FI_INC_LINK); |
780 | f2fs_lock_op(sbi); |
781 | err = f2fs_add_link(dentry, inode); |
782 | if (err) |
783 | goto out_fail; |
784 | f2fs_unlock_op(sbi); |
785 | |
786 | f2fs_alloc_nid_done(sbi, nid: inode->i_ino); |
787 | |
788 | d_instantiate_new(dentry, inode); |
789 | |
790 | if (IS_DIRSYNC(dir)) |
791 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
792 | |
793 | f2fs_balance_fs(sbi, need: true); |
794 | return 0; |
795 | |
796 | out_fail: |
797 | clear_inode_flag(inode, flag: FI_INC_LINK); |
798 | f2fs_handle_failed_inode(inode); |
799 | return err; |
800 | } |
801 | |
802 | static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) |
803 | { |
804 | struct inode *inode = d_inode(dentry); |
805 | |
806 | if (f2fs_empty_dir(dir: inode)) |
807 | return f2fs_unlink(dir, dentry); |
808 | return -ENOTEMPTY; |
809 | } |
810 | |
811 | static int f2fs_mknod(struct mnt_idmap *idmap, struct inode *dir, |
812 | struct dentry *dentry, umode_t mode, dev_t rdev) |
813 | { |
814 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
815 | struct inode *inode; |
816 | int err = 0; |
817 | |
818 | if (unlikely(f2fs_cp_error(sbi))) |
819 | return -EIO; |
820 | if (!f2fs_is_checkpoint_ready(sbi)) |
821 | return -ENOSPC; |
822 | |
823 | err = f2fs_dquot_initialize(inode: dir); |
824 | if (err) |
825 | return err; |
826 | |
827 | inode = f2fs_new_inode(idmap, dir, mode, NULL); |
828 | if (IS_ERR(ptr: inode)) |
829 | return PTR_ERR(ptr: inode); |
830 | |
831 | init_special_inode(inode, inode->i_mode, rdev); |
832 | inode->i_op = &f2fs_special_inode_operations; |
833 | |
834 | f2fs_lock_op(sbi); |
835 | err = f2fs_add_link(dentry, inode); |
836 | if (err) |
837 | goto out; |
838 | f2fs_unlock_op(sbi); |
839 | |
840 | f2fs_alloc_nid_done(sbi, nid: inode->i_ino); |
841 | |
842 | d_instantiate_new(dentry, inode); |
843 | |
844 | if (IS_DIRSYNC(dir)) |
845 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
846 | |
847 | f2fs_balance_fs(sbi, need: true); |
848 | return 0; |
849 | out: |
850 | f2fs_handle_failed_inode(inode); |
851 | return err; |
852 | } |
853 | |
854 | static int __f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir, |
855 | struct file *file, umode_t mode, bool is_whiteout, |
856 | struct inode **new_inode) |
857 | { |
858 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
859 | struct inode *inode; |
860 | int err; |
861 | |
862 | err = f2fs_dquot_initialize(inode: dir); |
863 | if (err) |
864 | return err; |
865 | |
866 | inode = f2fs_new_inode(idmap, dir, mode, NULL); |
867 | if (IS_ERR(ptr: inode)) |
868 | return PTR_ERR(ptr: inode); |
869 | |
870 | if (is_whiteout) { |
871 | init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); |
872 | inode->i_op = &f2fs_special_inode_operations; |
873 | } else { |
874 | inode->i_op = &f2fs_file_inode_operations; |
875 | inode->i_fop = &f2fs_file_operations; |
876 | inode->i_mapping->a_ops = &f2fs_dblock_aops; |
877 | } |
878 | |
879 | f2fs_lock_op(sbi); |
880 | err = f2fs_acquire_orphan_inode(sbi); |
881 | if (err) |
882 | goto out; |
883 | |
884 | err = f2fs_do_tmpfile(inode, dir); |
885 | if (err) |
886 | goto release_out; |
887 | |
888 | /* |
889 | * add this non-linked tmpfile to orphan list, in this way we could |
890 | * remove all unused data of tmpfile after abnormal power-off. |
891 | */ |
892 | f2fs_add_orphan_inode(inode); |
893 | f2fs_alloc_nid_done(sbi, nid: inode->i_ino); |
894 | |
895 | if (is_whiteout) { |
896 | f2fs_i_links_write(inode, inc: false); |
897 | |
898 | spin_lock(lock: &inode->i_lock); |
899 | inode->i_state |= I_LINKABLE; |
900 | spin_unlock(lock: &inode->i_lock); |
901 | } else { |
902 | if (file) |
903 | d_tmpfile(file, inode); |
904 | else |
905 | f2fs_i_links_write(inode, inc: false); |
906 | } |
907 | /* link_count was changed by d_tmpfile as well. */ |
908 | f2fs_unlock_op(sbi); |
909 | unlock_new_inode(inode); |
910 | |
911 | if (new_inode) |
912 | *new_inode = inode; |
913 | |
914 | f2fs_balance_fs(sbi, need: true); |
915 | return 0; |
916 | |
917 | release_out: |
918 | f2fs_release_orphan_inode(sbi); |
919 | out: |
920 | f2fs_handle_failed_inode(inode); |
921 | return err; |
922 | } |
923 | |
924 | static int f2fs_tmpfile(struct mnt_idmap *idmap, struct inode *dir, |
925 | struct file *file, umode_t mode) |
926 | { |
927 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: dir); |
928 | int err; |
929 | |
930 | if (unlikely(f2fs_cp_error(sbi))) |
931 | return -EIO; |
932 | if (!f2fs_is_checkpoint_ready(sbi)) |
933 | return -ENOSPC; |
934 | |
935 | err = __f2fs_tmpfile(idmap, dir, file, mode, is_whiteout: false, NULL); |
936 | |
937 | return finish_open_simple(file, error: err); |
938 | } |
939 | |
940 | static int f2fs_create_whiteout(struct mnt_idmap *idmap, |
941 | struct inode *dir, struct inode **whiteout) |
942 | { |
943 | return __f2fs_tmpfile(idmap, dir, NULL, |
944 | S_IFCHR | WHITEOUT_MODE, is_whiteout: true, new_inode: whiteout); |
945 | } |
946 | |
947 | int f2fs_get_tmpfile(struct mnt_idmap *idmap, struct inode *dir, |
948 | struct inode **new_inode) |
949 | { |
950 | return __f2fs_tmpfile(idmap, dir, NULL, S_IFREG, is_whiteout: false, new_inode); |
951 | } |
952 | |
953 | static int f2fs_rename(struct mnt_idmap *idmap, struct inode *old_dir, |
954 | struct dentry *old_dentry, struct inode *new_dir, |
955 | struct dentry *new_dentry, unsigned int flags) |
956 | { |
957 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: old_dir); |
958 | struct inode *old_inode = d_inode(dentry: old_dentry); |
959 | struct inode *new_inode = d_inode(dentry: new_dentry); |
960 | struct inode *whiteout = NULL; |
961 | struct page *old_dir_page = NULL; |
962 | struct page *old_page, *new_page = NULL; |
963 | struct f2fs_dir_entry *old_dir_entry = NULL; |
964 | struct f2fs_dir_entry *old_entry; |
965 | struct f2fs_dir_entry *new_entry; |
966 | int err; |
967 | |
968 | if (unlikely(f2fs_cp_error(sbi))) |
969 | return -EIO; |
970 | if (!f2fs_is_checkpoint_ready(sbi)) |
971 | return -ENOSPC; |
972 | |
973 | if (is_inode_flag_set(inode: new_dir, flag: FI_PROJ_INHERIT) && |
974 | (!projid_eq(left: F2FS_I(inode: new_dir)->i_projid, |
975 | right: F2FS_I(inode: old_dentry->d_inode)->i_projid))) |
976 | return -EXDEV; |
977 | |
978 | /* |
979 | * If new_inode is null, the below renaming flow will |
980 | * add a link in old_dir which can convert inline_dir. |
981 | * After then, if we failed to get the entry due to other |
982 | * reasons like ENOMEM, we had to remove the new entry. |
983 | * Instead of adding such the error handling routine, let's |
984 | * simply convert first here. |
985 | */ |
986 | if (old_dir == new_dir && !new_inode) { |
987 | err = f2fs_try_convert_inline_dir(dir: old_dir, dentry: new_dentry); |
988 | if (err) |
989 | return err; |
990 | } |
991 | |
992 | if (flags & RENAME_WHITEOUT) { |
993 | err = f2fs_create_whiteout(idmap, dir: old_dir, whiteout: &whiteout); |
994 | if (err) |
995 | return err; |
996 | } |
997 | |
998 | err = f2fs_dquot_initialize(inode: old_dir); |
999 | if (err) |
1000 | goto out; |
1001 | |
1002 | err = f2fs_dquot_initialize(inode: new_dir); |
1003 | if (err) |
1004 | goto out; |
1005 | |
1006 | if (new_inode) { |
1007 | err = f2fs_dquot_initialize(inode: new_inode); |
1008 | if (err) |
1009 | goto out; |
1010 | } |
1011 | |
1012 | err = -ENOENT; |
1013 | old_entry = f2fs_find_entry(dir: old_dir, child: &old_dentry->d_name, res_page: &old_page); |
1014 | if (!old_entry) { |
1015 | if (IS_ERR(ptr: old_page)) |
1016 | err = PTR_ERR(ptr: old_page); |
1017 | goto out; |
1018 | } |
1019 | |
1020 | if (S_ISDIR(old_inode->i_mode)) { |
1021 | old_dir_entry = f2fs_parent_dir(dir: old_inode, p: &old_dir_page); |
1022 | if (!old_dir_entry) { |
1023 | if (IS_ERR(ptr: old_dir_page)) |
1024 | err = PTR_ERR(ptr: old_dir_page); |
1025 | goto out_old; |
1026 | } |
1027 | } |
1028 | |
1029 | if (new_inode) { |
1030 | |
1031 | err = -ENOTEMPTY; |
1032 | if (old_dir_entry && !f2fs_empty_dir(dir: new_inode)) |
1033 | goto out_dir; |
1034 | |
1035 | err = -ENOENT; |
1036 | new_entry = f2fs_find_entry(dir: new_dir, child: &new_dentry->d_name, |
1037 | res_page: &new_page); |
1038 | if (!new_entry) { |
1039 | if (IS_ERR(ptr: new_page)) |
1040 | err = PTR_ERR(ptr: new_page); |
1041 | goto out_dir; |
1042 | } |
1043 | |
1044 | f2fs_balance_fs(sbi, need: true); |
1045 | |
1046 | f2fs_lock_op(sbi); |
1047 | |
1048 | err = f2fs_acquire_orphan_inode(sbi); |
1049 | if (err) |
1050 | goto put_out_dir; |
1051 | |
1052 | f2fs_set_link(dir: new_dir, de: new_entry, page: new_page, inode: old_inode); |
1053 | new_page = NULL; |
1054 | |
1055 | inode_set_ctime_current(inode: new_inode); |
1056 | f2fs_down_write(sem: &F2FS_I(inode: new_inode)->i_sem); |
1057 | if (old_dir_entry) |
1058 | f2fs_i_links_write(inode: new_inode, inc: false); |
1059 | f2fs_i_links_write(inode: new_inode, inc: false); |
1060 | f2fs_up_write(sem: &F2FS_I(inode: new_inode)->i_sem); |
1061 | |
1062 | if (!new_inode->i_nlink) |
1063 | f2fs_add_orphan_inode(inode: new_inode); |
1064 | else |
1065 | f2fs_release_orphan_inode(sbi); |
1066 | } else { |
1067 | f2fs_balance_fs(sbi, need: true); |
1068 | |
1069 | f2fs_lock_op(sbi); |
1070 | |
1071 | err = f2fs_add_link(dentry: new_dentry, inode: old_inode); |
1072 | if (err) { |
1073 | f2fs_unlock_op(sbi); |
1074 | goto out_dir; |
1075 | } |
1076 | |
1077 | if (old_dir_entry) |
1078 | f2fs_i_links_write(inode: new_dir, inc: true); |
1079 | } |
1080 | |
1081 | f2fs_down_write(sem: &F2FS_I(inode: old_inode)->i_sem); |
1082 | if (!old_dir_entry || whiteout) |
1083 | file_lost_pino(old_inode); |
1084 | else |
1085 | /* adjust dir's i_pino to pass fsck check */ |
1086 | f2fs_i_pino_write(inode: old_inode, pino: new_dir->i_ino); |
1087 | f2fs_up_write(sem: &F2FS_I(inode: old_inode)->i_sem); |
1088 | |
1089 | inode_set_ctime_current(inode: old_inode); |
1090 | f2fs_mark_inode_dirty_sync(inode: old_inode, sync: false); |
1091 | |
1092 | f2fs_delete_entry(dentry: old_entry, page: old_page, dir: old_dir, NULL); |
1093 | old_page = NULL; |
1094 | |
1095 | if (whiteout) { |
1096 | set_inode_flag(inode: whiteout, flag: FI_INC_LINK); |
1097 | err = f2fs_add_link(dentry: old_dentry, inode: whiteout); |
1098 | if (err) |
1099 | goto put_out_dir; |
1100 | |
1101 | spin_lock(lock: &whiteout->i_lock); |
1102 | whiteout->i_state &= ~I_LINKABLE; |
1103 | spin_unlock(lock: &whiteout->i_lock); |
1104 | |
1105 | iput(whiteout); |
1106 | } |
1107 | |
1108 | if (old_dir_entry) { |
1109 | if (old_dir != new_dir && !whiteout) |
1110 | f2fs_set_link(dir: old_inode, de: old_dir_entry, |
1111 | page: old_dir_page, inode: new_dir); |
1112 | else |
1113 | f2fs_put_page(page: old_dir_page, unlock: 0); |
1114 | f2fs_i_links_write(inode: old_dir, inc: false); |
1115 | } |
1116 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
1117 | f2fs_add_ino_entry(sbi, ino: new_dir->i_ino, type: TRANS_DIR_INO); |
1118 | if (S_ISDIR(old_inode->i_mode)) |
1119 | f2fs_add_ino_entry(sbi, ino: old_inode->i_ino, |
1120 | type: TRANS_DIR_INO); |
1121 | } |
1122 | |
1123 | f2fs_unlock_op(sbi); |
1124 | |
1125 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) |
1126 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
1127 | |
1128 | f2fs_update_time(sbi, type: REQ_TIME); |
1129 | return 0; |
1130 | |
1131 | put_out_dir: |
1132 | f2fs_unlock_op(sbi); |
1133 | f2fs_put_page(page: new_page, unlock: 0); |
1134 | out_dir: |
1135 | if (old_dir_entry) |
1136 | f2fs_put_page(page: old_dir_page, unlock: 0); |
1137 | out_old: |
1138 | f2fs_put_page(page: old_page, unlock: 0); |
1139 | out: |
1140 | iput(whiteout); |
1141 | return err; |
1142 | } |
1143 | |
1144 | static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, |
1145 | struct inode *new_dir, struct dentry *new_dentry) |
1146 | { |
1147 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode: old_dir); |
1148 | struct inode *old_inode = d_inode(dentry: old_dentry); |
1149 | struct inode *new_inode = d_inode(dentry: new_dentry); |
1150 | struct page *old_dir_page, *new_dir_page; |
1151 | struct page *old_page, *new_page; |
1152 | struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; |
1153 | struct f2fs_dir_entry *old_entry, *new_entry; |
1154 | int old_nlink = 0, new_nlink = 0; |
1155 | int err; |
1156 | |
1157 | if (unlikely(f2fs_cp_error(sbi))) |
1158 | return -EIO; |
1159 | if (!f2fs_is_checkpoint_ready(sbi)) |
1160 | return -ENOSPC; |
1161 | |
1162 | if ((is_inode_flag_set(inode: new_dir, flag: FI_PROJ_INHERIT) && |
1163 | !projid_eq(left: F2FS_I(inode: new_dir)->i_projid, |
1164 | right: F2FS_I(inode: old_dentry->d_inode)->i_projid)) || |
1165 | (is_inode_flag_set(inode: new_dir, flag: FI_PROJ_INHERIT) && |
1166 | !projid_eq(left: F2FS_I(inode: old_dir)->i_projid, |
1167 | right: F2FS_I(inode: new_dentry->d_inode)->i_projid))) |
1168 | return -EXDEV; |
1169 | |
1170 | err = f2fs_dquot_initialize(inode: old_dir); |
1171 | if (err) |
1172 | goto out; |
1173 | |
1174 | err = f2fs_dquot_initialize(inode: new_dir); |
1175 | if (err) |
1176 | goto out; |
1177 | |
1178 | err = -ENOENT; |
1179 | old_entry = f2fs_find_entry(dir: old_dir, child: &old_dentry->d_name, res_page: &old_page); |
1180 | if (!old_entry) { |
1181 | if (IS_ERR(ptr: old_page)) |
1182 | err = PTR_ERR(ptr: old_page); |
1183 | goto out; |
1184 | } |
1185 | |
1186 | new_entry = f2fs_find_entry(dir: new_dir, child: &new_dentry->d_name, res_page: &new_page); |
1187 | if (!new_entry) { |
1188 | if (IS_ERR(ptr: new_page)) |
1189 | err = PTR_ERR(ptr: new_page); |
1190 | goto out_old; |
1191 | } |
1192 | |
1193 | /* prepare for updating ".." directory entry info later */ |
1194 | if (old_dir != new_dir) { |
1195 | if (S_ISDIR(old_inode->i_mode)) { |
1196 | old_dir_entry = f2fs_parent_dir(dir: old_inode, |
1197 | p: &old_dir_page); |
1198 | if (!old_dir_entry) { |
1199 | if (IS_ERR(ptr: old_dir_page)) |
1200 | err = PTR_ERR(ptr: old_dir_page); |
1201 | goto out_new; |
1202 | } |
1203 | } |
1204 | |
1205 | if (S_ISDIR(new_inode->i_mode)) { |
1206 | new_dir_entry = f2fs_parent_dir(dir: new_inode, |
1207 | p: &new_dir_page); |
1208 | if (!new_dir_entry) { |
1209 | if (IS_ERR(ptr: new_dir_page)) |
1210 | err = PTR_ERR(ptr: new_dir_page); |
1211 | goto out_old_dir; |
1212 | } |
1213 | } |
1214 | } |
1215 | |
1216 | /* |
1217 | * If cross rename between file and directory those are not |
1218 | * in the same directory, we will inc nlink of file's parent |
1219 | * later, so we should check upper boundary of its nlink. |
1220 | */ |
1221 | if ((!old_dir_entry || !new_dir_entry) && |
1222 | old_dir_entry != new_dir_entry) { |
1223 | old_nlink = old_dir_entry ? -1 : 1; |
1224 | new_nlink = -old_nlink; |
1225 | err = -EMLINK; |
1226 | if ((old_nlink > 0 && old_dir->i_nlink >= F2FS_LINK_MAX) || |
1227 | (new_nlink > 0 && new_dir->i_nlink >= F2FS_LINK_MAX)) |
1228 | goto out_new_dir; |
1229 | } |
1230 | |
1231 | f2fs_balance_fs(sbi, need: true); |
1232 | |
1233 | f2fs_lock_op(sbi); |
1234 | |
1235 | /* update ".." directory entry info of old dentry */ |
1236 | if (old_dir_entry) |
1237 | f2fs_set_link(dir: old_inode, de: old_dir_entry, page: old_dir_page, inode: new_dir); |
1238 | |
1239 | /* update ".." directory entry info of new dentry */ |
1240 | if (new_dir_entry) |
1241 | f2fs_set_link(dir: new_inode, de: new_dir_entry, page: new_dir_page, inode: old_dir); |
1242 | |
1243 | /* update directory entry info of old dir inode */ |
1244 | f2fs_set_link(dir: old_dir, de: old_entry, page: old_page, inode: new_inode); |
1245 | |
1246 | f2fs_down_write(sem: &F2FS_I(inode: old_inode)->i_sem); |
1247 | if (!old_dir_entry) |
1248 | file_lost_pino(old_inode); |
1249 | else |
1250 | /* adjust dir's i_pino to pass fsck check */ |
1251 | f2fs_i_pino_write(inode: old_inode, pino: new_dir->i_ino); |
1252 | f2fs_up_write(sem: &F2FS_I(inode: old_inode)->i_sem); |
1253 | |
1254 | inode_set_ctime_current(inode: old_dir); |
1255 | if (old_nlink) { |
1256 | f2fs_down_write(sem: &F2FS_I(inode: old_dir)->i_sem); |
1257 | f2fs_i_links_write(inode: old_dir, inc: old_nlink > 0); |
1258 | f2fs_up_write(sem: &F2FS_I(inode: old_dir)->i_sem); |
1259 | } |
1260 | f2fs_mark_inode_dirty_sync(inode: old_dir, sync: false); |
1261 | |
1262 | /* update directory entry info of new dir inode */ |
1263 | f2fs_set_link(dir: new_dir, de: new_entry, page: new_page, inode: old_inode); |
1264 | |
1265 | f2fs_down_write(sem: &F2FS_I(inode: new_inode)->i_sem); |
1266 | if (!new_dir_entry) |
1267 | file_lost_pino(new_inode); |
1268 | else |
1269 | /* adjust dir's i_pino to pass fsck check */ |
1270 | f2fs_i_pino_write(inode: new_inode, pino: old_dir->i_ino); |
1271 | f2fs_up_write(sem: &F2FS_I(inode: new_inode)->i_sem); |
1272 | |
1273 | inode_set_ctime_current(inode: new_dir); |
1274 | if (new_nlink) { |
1275 | f2fs_down_write(sem: &F2FS_I(inode: new_dir)->i_sem); |
1276 | f2fs_i_links_write(inode: new_dir, inc: new_nlink > 0); |
1277 | f2fs_up_write(sem: &F2FS_I(inode: new_dir)->i_sem); |
1278 | } |
1279 | f2fs_mark_inode_dirty_sync(inode: new_dir, sync: false); |
1280 | |
1281 | if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT) { |
1282 | f2fs_add_ino_entry(sbi, ino: old_dir->i_ino, type: TRANS_DIR_INO); |
1283 | f2fs_add_ino_entry(sbi, ino: new_dir->i_ino, type: TRANS_DIR_INO); |
1284 | } |
1285 | |
1286 | f2fs_unlock_op(sbi); |
1287 | |
1288 | if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) |
1289 | f2fs_sync_fs(sb: sbi->sb, sync: 1); |
1290 | |
1291 | f2fs_update_time(sbi, type: REQ_TIME); |
1292 | return 0; |
1293 | out_new_dir: |
1294 | if (new_dir_entry) { |
1295 | f2fs_put_page(page: new_dir_page, unlock: 0); |
1296 | } |
1297 | out_old_dir: |
1298 | if (old_dir_entry) { |
1299 | f2fs_put_page(page: old_dir_page, unlock: 0); |
1300 | } |
1301 | out_new: |
1302 | f2fs_put_page(page: new_page, unlock: 0); |
1303 | out_old: |
1304 | f2fs_put_page(page: old_page, unlock: 0); |
1305 | out: |
1306 | return err; |
1307 | } |
1308 | |
1309 | static int f2fs_rename2(struct mnt_idmap *idmap, |
1310 | struct inode *old_dir, struct dentry *old_dentry, |
1311 | struct inode *new_dir, struct dentry *new_dentry, |
1312 | unsigned int flags) |
1313 | { |
1314 | int err; |
1315 | |
1316 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
1317 | return -EINVAL; |
1318 | |
1319 | err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, |
1320 | flags); |
1321 | if (err) |
1322 | return err; |
1323 | |
1324 | if (flags & RENAME_EXCHANGE) { |
1325 | return f2fs_cross_rename(old_dir, old_dentry, |
1326 | new_dir, new_dentry); |
1327 | } |
1328 | /* |
1329 | * VFS has already handled the new dentry existence case, |
1330 | * here, we just deal with "RENAME_NOREPLACE" as regular rename. |
1331 | */ |
1332 | return f2fs_rename(idmap, old_dir, old_dentry, |
1333 | new_dir, new_dentry, flags); |
1334 | } |
1335 | |
1336 | static const char *f2fs_encrypted_get_link(struct dentry *dentry, |
1337 | struct inode *inode, |
1338 | struct delayed_call *done) |
1339 | { |
1340 | struct page *page; |
1341 | const char *target; |
1342 | |
1343 | if (!dentry) |
1344 | return ERR_PTR(error: -ECHILD); |
1345 | |
1346 | page = read_mapping_page(mapping: inode->i_mapping, index: 0, NULL); |
1347 | if (IS_ERR(ptr: page)) |
1348 | return ERR_CAST(ptr: page); |
1349 | |
1350 | target = fscrypt_get_symlink(inode, page_address(page), |
1351 | max_size: inode->i_sb->s_blocksize, done); |
1352 | put_page(page); |
1353 | return target; |
1354 | } |
1355 | |
1356 | static int f2fs_encrypted_symlink_getattr(struct mnt_idmap *idmap, |
1357 | const struct path *path, |
1358 | struct kstat *stat, u32 request_mask, |
1359 | unsigned int query_flags) |
1360 | { |
1361 | f2fs_getattr(idmap, path, stat, request_mask, flags: query_flags); |
1362 | |
1363 | return fscrypt_symlink_getattr(path, stat); |
1364 | } |
1365 | |
1366 | const struct inode_operations f2fs_encrypted_symlink_inode_operations = { |
1367 | .get_link = f2fs_encrypted_get_link, |
1368 | .getattr = f2fs_encrypted_symlink_getattr, |
1369 | .setattr = f2fs_setattr, |
1370 | .listxattr = f2fs_listxattr, |
1371 | }; |
1372 | |
1373 | const struct inode_operations f2fs_dir_inode_operations = { |
1374 | .create = f2fs_create, |
1375 | .lookup = f2fs_lookup, |
1376 | .link = f2fs_link, |
1377 | .unlink = f2fs_unlink, |
1378 | .symlink = f2fs_symlink, |
1379 | .mkdir = f2fs_mkdir, |
1380 | .rmdir = f2fs_rmdir, |
1381 | .mknod = f2fs_mknod, |
1382 | .rename = f2fs_rename2, |
1383 | .tmpfile = f2fs_tmpfile, |
1384 | .getattr = f2fs_getattr, |
1385 | .setattr = f2fs_setattr, |
1386 | .get_inode_acl = f2fs_get_acl, |
1387 | .set_acl = f2fs_set_acl, |
1388 | .listxattr = f2fs_listxattr, |
1389 | .fiemap = f2fs_fiemap, |
1390 | .fileattr_get = f2fs_fileattr_get, |
1391 | .fileattr_set = f2fs_fileattr_set, |
1392 | }; |
1393 | |
1394 | const struct inode_operations f2fs_symlink_inode_operations = { |
1395 | .get_link = f2fs_get_link, |
1396 | .getattr = f2fs_getattr, |
1397 | .setattr = f2fs_setattr, |
1398 | .listxattr = f2fs_listxattr, |
1399 | }; |
1400 | |
1401 | const struct inode_operations f2fs_special_inode_operations = { |
1402 | .getattr = f2fs_getattr, |
1403 | .setattr = f2fs_setattr, |
1404 | .get_inode_acl = f2fs_get_acl, |
1405 | .set_acl = f2fs_set_acl, |
1406 | .listxattr = f2fs_listxattr, |
1407 | }; |
1408 | |