namei.c 19 KB

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  1. /*
  2. * fs/f2fs/namei.c
  3. *
  4. * Copyright (c) 2012 Samsung Electronics Co., Ltd.
  5. * http://www.samsung.com/
  6. *
  7. * This program is free software; you can redistribute it and/or modify
  8. * it under the terms of the GNU General Public License version 2 as
  9. * published by the Free Software Foundation.
  10. */
  11. #include <linux/fs.h>
  12. #include <linux/f2fs_fs.h>
  13. #include <linux/pagemap.h>
  14. #include <linux/sched.h>
  15. #include <linux/ctype.h>
  16. #include <linux/dcache.h>
  17. #include <linux/namei.h>
  18. #include "f2fs.h"
  19. #include "node.h"
  20. #include "xattr.h"
  21. #include "acl.h"
  22. #include <trace/events/f2fs.h>
  23. static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
  24. {
  25. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  26. nid_t ino;
  27. struct inode *inode;
  28. bool nid_free = false;
  29. int err;
  30. inode = new_inode(dir->i_sb);
  31. if (!inode)
  32. return ERR_PTR(-ENOMEM);
  33. f2fs_lock_op(sbi);
  34. if (!alloc_nid(sbi, &ino)) {
  35. f2fs_unlock_op(sbi);
  36. err = -ENOSPC;
  37. goto fail;
  38. }
  39. f2fs_unlock_op(sbi);
  40. inode_init_owner(inode, dir, mode);
  41. inode->i_ino = ino;
  42. inode->i_blocks = 0;
  43. inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
  44. inode->i_generation = sbi->s_next_generation++;
  45. err = insert_inode_locked(inode);
  46. if (err) {
  47. err = -EINVAL;
  48. nid_free = true;
  49. goto out;
  50. }
  51. if (f2fs_may_inline(inode))
  52. set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
  53. if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode))
  54. set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
  55. trace_f2fs_new_inode(inode, 0);
  56. mark_inode_dirty(inode);
  57. return inode;
  58. out:
  59. clear_nlink(inode);
  60. unlock_new_inode(inode);
  61. fail:
  62. trace_f2fs_new_inode(inode, err);
  63. make_bad_inode(inode);
  64. iput(inode);
  65. if (nid_free)
  66. alloc_nid_failed(sbi, ino);
  67. return ERR_PTR(err);
  68. }
  69. static int is_multimedia_file(const unsigned char *s, const char *sub)
  70. {
  71. size_t slen = strlen(s);
  72. size_t sublen = strlen(sub);
  73. if (sublen > slen)
  74. return 0;
  75. return !strncasecmp(s + slen - sublen, sub, sublen);
  76. }
  77. /*
  78. * Set multimedia files as cold files for hot/cold data separation
  79. */
  80. static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
  81. const unsigned char *name)
  82. {
  83. int i;
  84. __u8 (*extlist)[8] = sbi->raw_super->extension_list;
  85. int count = le32_to_cpu(sbi->raw_super->extension_count);
  86. for (i = 0; i < count; i++) {
  87. if (is_multimedia_file(name, extlist[i])) {
  88. file_set_cold(inode);
  89. break;
  90. }
  91. }
  92. }
  93. static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
  94. bool excl)
  95. {
  96. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  97. struct inode *inode;
  98. nid_t ino = 0;
  99. int err;
  100. f2fs_balance_fs(sbi);
  101. inode = f2fs_new_inode(dir, mode);
  102. if (IS_ERR(inode))
  103. return PTR_ERR(inode);
  104. if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
  105. set_cold_files(sbi, inode, dentry->d_name.name);
  106. inode->i_op = &f2fs_file_inode_operations;
  107. inode->i_fop = &f2fs_file_operations;
  108. inode->i_mapping->a_ops = &f2fs_dblock_aops;
  109. ino = inode->i_ino;
  110. f2fs_lock_op(sbi);
  111. err = f2fs_add_link(dentry, inode);
  112. if (err)
  113. goto out;
  114. f2fs_unlock_op(sbi);
  115. alloc_nid_done(sbi, ino);
  116. stat_inc_inline_inode(inode);
  117. d_instantiate(dentry, inode);
  118. unlock_new_inode(inode);
  119. if (IS_DIRSYNC(dir))
  120. f2fs_sync_fs(sbi->sb, 1);
  121. return 0;
  122. out:
  123. handle_failed_inode(inode);
  124. return err;
  125. }
  126. static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
  127. struct dentry *dentry)
  128. {
  129. struct inode *inode = d_inode(old_dentry);
  130. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  131. int err;
  132. f2fs_balance_fs(sbi);
  133. inode->i_ctime = CURRENT_TIME;
  134. ihold(inode);
  135. set_inode_flag(F2FS_I(inode), FI_INC_LINK);
  136. f2fs_lock_op(sbi);
  137. err = f2fs_add_link(dentry, inode);
  138. if (err)
  139. goto out;
  140. f2fs_unlock_op(sbi);
  141. d_instantiate(dentry, inode);
  142. if (IS_DIRSYNC(dir))
  143. f2fs_sync_fs(sbi->sb, 1);
  144. return 0;
  145. out:
  146. clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
  147. iput(inode);
  148. f2fs_unlock_op(sbi);
  149. return err;
  150. }
  151. struct dentry *f2fs_get_parent(struct dentry *child)
  152. {
  153. struct qstr dotdot = QSTR_INIT("..", 2);
  154. unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot);
  155. if (!ino)
  156. return ERR_PTR(-ENOENT);
  157. return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino));
  158. }
  159. static int __recover_dot_dentries(struct inode *dir, nid_t pino)
  160. {
  161. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  162. struct qstr dot = QSTR_INIT(".", 1);
  163. struct qstr dotdot = QSTR_INIT("..", 2);
  164. struct f2fs_dir_entry *de;
  165. struct page *page;
  166. int err = 0;
  167. f2fs_lock_op(sbi);
  168. de = f2fs_find_entry(dir, &dot, &page);
  169. if (de) {
  170. f2fs_dentry_kunmap(dir, page);
  171. f2fs_put_page(page, 0);
  172. } else {
  173. err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
  174. if (err)
  175. goto out;
  176. }
  177. de = f2fs_find_entry(dir, &dotdot, &page);
  178. if (de) {
  179. f2fs_dentry_kunmap(dir, page);
  180. f2fs_put_page(page, 0);
  181. } else {
  182. err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
  183. }
  184. out:
  185. if (!err) {
  186. clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS);
  187. mark_inode_dirty(dir);
  188. }
  189. f2fs_unlock_op(sbi);
  190. return err;
  191. }
  192. static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
  193. unsigned int flags)
  194. {
  195. struct inode *inode = NULL;
  196. struct f2fs_dir_entry *de;
  197. struct page *page;
  198. if (dentry->d_name.len > F2FS_NAME_LEN)
  199. return ERR_PTR(-ENAMETOOLONG);
  200. de = f2fs_find_entry(dir, &dentry->d_name, &page);
  201. if (de) {
  202. nid_t ino = le32_to_cpu(de->ino);
  203. f2fs_dentry_kunmap(dir, page);
  204. f2fs_put_page(page, 0);
  205. inode = f2fs_iget(dir->i_sb, ino);
  206. if (IS_ERR(inode))
  207. return ERR_CAST(inode);
  208. if (f2fs_has_inline_dots(inode)) {
  209. int err;
  210. err = __recover_dot_dentries(inode, dir->i_ino);
  211. if (err) {
  212. iget_failed(inode);
  213. return ERR_PTR(err);
  214. }
  215. }
  216. }
  217. return d_splice_alias(inode, dentry);
  218. }
  219. static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
  220. {
  221. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  222. struct inode *inode = d_inode(dentry);
  223. struct f2fs_dir_entry *de;
  224. struct page *page;
  225. int err = -ENOENT;
  226. trace_f2fs_unlink_enter(dir, dentry);
  227. f2fs_balance_fs(sbi);
  228. de = f2fs_find_entry(dir, &dentry->d_name, &page);
  229. if (!de)
  230. goto fail;
  231. f2fs_lock_op(sbi);
  232. err = acquire_orphan_inode(sbi);
  233. if (err) {
  234. f2fs_unlock_op(sbi);
  235. f2fs_dentry_kunmap(dir, page);
  236. f2fs_put_page(page, 0);
  237. goto fail;
  238. }
  239. f2fs_delete_entry(de, page, dir, inode);
  240. f2fs_unlock_op(sbi);
  241. /* In order to evict this inode, we set it dirty */
  242. mark_inode_dirty(inode);
  243. if (IS_DIRSYNC(dir))
  244. f2fs_sync_fs(sbi->sb, 1);
  245. fail:
  246. trace_f2fs_unlink_exit(inode, err);
  247. return err;
  248. }
  249. static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
  250. {
  251. struct page *page = page_follow_link_light(dentry, nd);
  252. if (IS_ERR_OR_NULL(page))
  253. return page;
  254. /* this is broken symlink case */
  255. if (*nd_get_link(nd) == 0) {
  256. page_put_link(dentry, nd, page);
  257. return ERR_PTR(-ENOENT);
  258. }
  259. return page;
  260. }
  261. static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
  262. const char *symname)
  263. {
  264. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  265. struct inode *inode;
  266. size_t symlen = strlen(symname) + 1;
  267. int err;
  268. f2fs_balance_fs(sbi);
  269. inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
  270. if (IS_ERR(inode))
  271. return PTR_ERR(inode);
  272. inode->i_op = &f2fs_symlink_inode_operations;
  273. inode->i_mapping->a_ops = &f2fs_dblock_aops;
  274. f2fs_lock_op(sbi);
  275. err = f2fs_add_link(dentry, inode);
  276. if (err)
  277. goto out;
  278. f2fs_unlock_op(sbi);
  279. err = page_symlink(inode, symname, symlen);
  280. alloc_nid_done(sbi, inode->i_ino);
  281. d_instantiate(dentry, inode);
  282. unlock_new_inode(inode);
  283. /*
  284. * Let's flush symlink data in order to avoid broken symlink as much as
  285. * possible. Nevertheless, fsyncing is the best way, but there is no
  286. * way to get a file descriptor in order to flush that.
  287. *
  288. * Note that, it needs to do dir->fsync to make this recoverable.
  289. * If the symlink path is stored into inline_data, there is no
  290. * performance regression.
  291. */
  292. filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
  293. if (IS_DIRSYNC(dir))
  294. f2fs_sync_fs(sbi->sb, 1);
  295. return err;
  296. out:
  297. handle_failed_inode(inode);
  298. return err;
  299. }
  300. static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
  301. {
  302. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  303. struct inode *inode;
  304. int err;
  305. f2fs_balance_fs(sbi);
  306. inode = f2fs_new_inode(dir, S_IFDIR | mode);
  307. if (IS_ERR(inode))
  308. return PTR_ERR(inode);
  309. inode->i_op = &f2fs_dir_inode_operations;
  310. inode->i_fop = &f2fs_dir_operations;
  311. inode->i_mapping->a_ops = &f2fs_dblock_aops;
  312. mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
  313. set_inode_flag(F2FS_I(inode), FI_INC_LINK);
  314. f2fs_lock_op(sbi);
  315. err = f2fs_add_link(dentry, inode);
  316. if (err)
  317. goto out_fail;
  318. f2fs_unlock_op(sbi);
  319. stat_inc_inline_dir(inode);
  320. alloc_nid_done(sbi, inode->i_ino);
  321. d_instantiate(dentry, inode);
  322. unlock_new_inode(inode);
  323. if (IS_DIRSYNC(dir))
  324. f2fs_sync_fs(sbi->sb, 1);
  325. return 0;
  326. out_fail:
  327. clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
  328. handle_failed_inode(inode);
  329. return err;
  330. }
  331. static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
  332. {
  333. struct inode *inode = d_inode(dentry);
  334. if (f2fs_empty_dir(inode))
  335. return f2fs_unlink(dir, dentry);
  336. return -ENOTEMPTY;
  337. }
  338. static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
  339. umode_t mode, dev_t rdev)
  340. {
  341. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  342. struct inode *inode;
  343. int err = 0;
  344. if (!new_valid_dev(rdev))
  345. return -EINVAL;
  346. f2fs_balance_fs(sbi);
  347. inode = f2fs_new_inode(dir, mode);
  348. if (IS_ERR(inode))
  349. return PTR_ERR(inode);
  350. init_special_inode(inode, inode->i_mode, rdev);
  351. inode->i_op = &f2fs_special_inode_operations;
  352. f2fs_lock_op(sbi);
  353. err = f2fs_add_link(dentry, inode);
  354. if (err)
  355. goto out;
  356. f2fs_unlock_op(sbi);
  357. alloc_nid_done(sbi, inode->i_ino);
  358. d_instantiate(dentry, inode);
  359. unlock_new_inode(inode);
  360. if (IS_DIRSYNC(dir))
  361. f2fs_sync_fs(sbi->sb, 1);
  362. return 0;
  363. out:
  364. handle_failed_inode(inode);
  365. return err;
  366. }
  367. static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
  368. struct inode *new_dir, struct dentry *new_dentry)
  369. {
  370. struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
  371. struct inode *old_inode = d_inode(old_dentry);
  372. struct inode *new_inode = d_inode(new_dentry);
  373. struct page *old_dir_page;
  374. struct page *old_page, *new_page;
  375. struct f2fs_dir_entry *old_dir_entry = NULL;
  376. struct f2fs_dir_entry *old_entry;
  377. struct f2fs_dir_entry *new_entry;
  378. int err = -ENOENT;
  379. f2fs_balance_fs(sbi);
  380. old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
  381. if (!old_entry)
  382. goto out;
  383. if (S_ISDIR(old_inode->i_mode)) {
  384. err = -EIO;
  385. old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
  386. if (!old_dir_entry)
  387. goto out_old;
  388. }
  389. if (new_inode) {
  390. err = -ENOTEMPTY;
  391. if (old_dir_entry && !f2fs_empty_dir(new_inode))
  392. goto out_dir;
  393. err = -ENOENT;
  394. new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
  395. &new_page);
  396. if (!new_entry)
  397. goto out_dir;
  398. f2fs_lock_op(sbi);
  399. err = acquire_orphan_inode(sbi);
  400. if (err)
  401. goto put_out_dir;
  402. if (update_dent_inode(old_inode, &new_dentry->d_name)) {
  403. release_orphan_inode(sbi);
  404. goto put_out_dir;
  405. }
  406. f2fs_set_link(new_dir, new_entry, new_page, old_inode);
  407. new_inode->i_ctime = CURRENT_TIME;
  408. down_write(&F2FS_I(new_inode)->i_sem);
  409. if (old_dir_entry)
  410. drop_nlink(new_inode);
  411. drop_nlink(new_inode);
  412. up_write(&F2FS_I(new_inode)->i_sem);
  413. mark_inode_dirty(new_inode);
  414. if (!new_inode->i_nlink)
  415. add_orphan_inode(sbi, new_inode->i_ino);
  416. else
  417. release_orphan_inode(sbi);
  418. update_inode_page(old_inode);
  419. update_inode_page(new_inode);
  420. } else {
  421. f2fs_lock_op(sbi);
  422. err = f2fs_add_link(new_dentry, old_inode);
  423. if (err) {
  424. f2fs_unlock_op(sbi);
  425. goto out_dir;
  426. }
  427. if (old_dir_entry) {
  428. inc_nlink(new_dir);
  429. update_inode_page(new_dir);
  430. }
  431. }
  432. down_write(&F2FS_I(old_inode)->i_sem);
  433. file_lost_pino(old_inode);
  434. up_write(&F2FS_I(old_inode)->i_sem);
  435. old_inode->i_ctime = CURRENT_TIME;
  436. mark_inode_dirty(old_inode);
  437. f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
  438. if (old_dir_entry) {
  439. if (old_dir != new_dir) {
  440. f2fs_set_link(old_inode, old_dir_entry,
  441. old_dir_page, new_dir);
  442. update_inode_page(old_inode);
  443. } else {
  444. f2fs_dentry_kunmap(old_inode, old_dir_page);
  445. f2fs_put_page(old_dir_page, 0);
  446. }
  447. drop_nlink(old_dir);
  448. mark_inode_dirty(old_dir);
  449. update_inode_page(old_dir);
  450. }
  451. f2fs_unlock_op(sbi);
  452. if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
  453. f2fs_sync_fs(sbi->sb, 1);
  454. return 0;
  455. put_out_dir:
  456. f2fs_unlock_op(sbi);
  457. f2fs_dentry_kunmap(new_dir, new_page);
  458. f2fs_put_page(new_page, 0);
  459. out_dir:
  460. if (old_dir_entry) {
  461. f2fs_dentry_kunmap(old_inode, old_dir_page);
  462. f2fs_put_page(old_dir_page, 0);
  463. }
  464. out_old:
  465. f2fs_dentry_kunmap(old_dir, old_page);
  466. f2fs_put_page(old_page, 0);
  467. out:
  468. return err;
  469. }
  470. static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
  471. struct inode *new_dir, struct dentry *new_dentry)
  472. {
  473. struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
  474. struct inode *old_inode = d_inode(old_dentry);
  475. struct inode *new_inode = d_inode(new_dentry);
  476. struct page *old_dir_page, *new_dir_page;
  477. struct page *old_page, *new_page;
  478. struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
  479. struct f2fs_dir_entry *old_entry, *new_entry;
  480. int old_nlink = 0, new_nlink = 0;
  481. int err = -ENOENT;
  482. f2fs_balance_fs(sbi);
  483. old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
  484. if (!old_entry)
  485. goto out;
  486. new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
  487. if (!new_entry)
  488. goto out_old;
  489. /* prepare for updating ".." directory entry info later */
  490. if (old_dir != new_dir) {
  491. if (S_ISDIR(old_inode->i_mode)) {
  492. err = -EIO;
  493. old_dir_entry = f2fs_parent_dir(old_inode,
  494. &old_dir_page);
  495. if (!old_dir_entry)
  496. goto out_new;
  497. }
  498. if (S_ISDIR(new_inode->i_mode)) {
  499. err = -EIO;
  500. new_dir_entry = f2fs_parent_dir(new_inode,
  501. &new_dir_page);
  502. if (!new_dir_entry)
  503. goto out_old_dir;
  504. }
  505. }
  506. /*
  507. * If cross rename between file and directory those are not
  508. * in the same directory, we will inc nlink of file's parent
  509. * later, so we should check upper boundary of its nlink.
  510. */
  511. if ((!old_dir_entry || !new_dir_entry) &&
  512. old_dir_entry != new_dir_entry) {
  513. old_nlink = old_dir_entry ? -1 : 1;
  514. new_nlink = -old_nlink;
  515. err = -EMLINK;
  516. if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
  517. (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
  518. goto out_new_dir;
  519. }
  520. f2fs_lock_op(sbi);
  521. err = update_dent_inode(old_inode, &new_dentry->d_name);
  522. if (err)
  523. goto out_unlock;
  524. err = update_dent_inode(new_inode, &old_dentry->d_name);
  525. if (err)
  526. goto out_undo;
  527. /* update ".." directory entry info of old dentry */
  528. if (old_dir_entry)
  529. f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
  530. /* update ".." directory entry info of new dentry */
  531. if (new_dir_entry)
  532. f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
  533. /* update directory entry info of old dir inode */
  534. f2fs_set_link(old_dir, old_entry, old_page, new_inode);
  535. down_write(&F2FS_I(old_inode)->i_sem);
  536. file_lost_pino(old_inode);
  537. up_write(&F2FS_I(old_inode)->i_sem);
  538. update_inode_page(old_inode);
  539. old_dir->i_ctime = CURRENT_TIME;
  540. if (old_nlink) {
  541. down_write(&F2FS_I(old_dir)->i_sem);
  542. if (old_nlink < 0)
  543. drop_nlink(old_dir);
  544. else
  545. inc_nlink(old_dir);
  546. up_write(&F2FS_I(old_dir)->i_sem);
  547. }
  548. mark_inode_dirty(old_dir);
  549. update_inode_page(old_dir);
  550. /* update directory entry info of new dir inode */
  551. f2fs_set_link(new_dir, new_entry, new_page, old_inode);
  552. down_write(&F2FS_I(new_inode)->i_sem);
  553. file_lost_pino(new_inode);
  554. up_write(&F2FS_I(new_inode)->i_sem);
  555. update_inode_page(new_inode);
  556. new_dir->i_ctime = CURRENT_TIME;
  557. if (new_nlink) {
  558. down_write(&F2FS_I(new_dir)->i_sem);
  559. if (new_nlink < 0)
  560. drop_nlink(new_dir);
  561. else
  562. inc_nlink(new_dir);
  563. up_write(&F2FS_I(new_dir)->i_sem);
  564. }
  565. mark_inode_dirty(new_dir);
  566. update_inode_page(new_dir);
  567. f2fs_unlock_op(sbi);
  568. if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
  569. f2fs_sync_fs(sbi->sb, 1);
  570. return 0;
  571. out_undo:
  572. /* Still we may fail to recover name info of f2fs_inode here */
  573. update_dent_inode(old_inode, &old_dentry->d_name);
  574. out_unlock:
  575. f2fs_unlock_op(sbi);
  576. out_new_dir:
  577. if (new_dir_entry) {
  578. f2fs_dentry_kunmap(new_inode, new_dir_page);
  579. f2fs_put_page(new_dir_page, 0);
  580. }
  581. out_old_dir:
  582. if (old_dir_entry) {
  583. f2fs_dentry_kunmap(old_inode, old_dir_page);
  584. f2fs_put_page(old_dir_page, 0);
  585. }
  586. out_new:
  587. f2fs_dentry_kunmap(new_dir, new_page);
  588. f2fs_put_page(new_page, 0);
  589. out_old:
  590. f2fs_dentry_kunmap(old_dir, old_page);
  591. f2fs_put_page(old_page, 0);
  592. out:
  593. return err;
  594. }
  595. static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
  596. struct inode *new_dir, struct dentry *new_dentry,
  597. unsigned int flags)
  598. {
  599. if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
  600. return -EINVAL;
  601. if (flags & RENAME_EXCHANGE) {
  602. return f2fs_cross_rename(old_dir, old_dentry,
  603. new_dir, new_dentry);
  604. }
  605. /*
  606. * VFS has already handled the new dentry existence case,
  607. * here, we just deal with "RENAME_NOREPLACE" as regular rename.
  608. */
  609. return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
  610. }
  611. static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
  612. {
  613. struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
  614. struct inode *inode;
  615. int err;
  616. inode = f2fs_new_inode(dir, mode);
  617. if (IS_ERR(inode))
  618. return PTR_ERR(inode);
  619. inode->i_op = &f2fs_file_inode_operations;
  620. inode->i_fop = &f2fs_file_operations;
  621. inode->i_mapping->a_ops = &f2fs_dblock_aops;
  622. f2fs_lock_op(sbi);
  623. err = acquire_orphan_inode(sbi);
  624. if (err)
  625. goto out;
  626. err = f2fs_do_tmpfile(inode, dir);
  627. if (err)
  628. goto release_out;
  629. /*
  630. * add this non-linked tmpfile to orphan list, in this way we could
  631. * remove all unused data of tmpfile after abnormal power-off.
  632. */
  633. add_orphan_inode(sbi, inode->i_ino);
  634. f2fs_unlock_op(sbi);
  635. alloc_nid_done(sbi, inode->i_ino);
  636. stat_inc_inline_inode(inode);
  637. d_tmpfile(dentry, inode);
  638. unlock_new_inode(inode);
  639. return 0;
  640. release_out:
  641. release_orphan_inode(sbi);
  642. out:
  643. handle_failed_inode(inode);
  644. return err;
  645. }
  646. const struct inode_operations f2fs_dir_inode_operations = {
  647. .create = f2fs_create,
  648. .lookup = f2fs_lookup,
  649. .link = f2fs_link,
  650. .unlink = f2fs_unlink,
  651. .symlink = f2fs_symlink,
  652. .mkdir = f2fs_mkdir,
  653. .rmdir = f2fs_rmdir,
  654. .mknod = f2fs_mknod,
  655. .rename2 = f2fs_rename2,
  656. .tmpfile = f2fs_tmpfile,
  657. .getattr = f2fs_getattr,
  658. .setattr = f2fs_setattr,
  659. .get_acl = f2fs_get_acl,
  660. .set_acl = f2fs_set_acl,
  661. #ifdef CONFIG_F2FS_FS_XATTR
  662. .setxattr = generic_setxattr,
  663. .getxattr = generic_getxattr,
  664. .listxattr = f2fs_listxattr,
  665. .removexattr = generic_removexattr,
  666. #endif
  667. };
  668. const struct inode_operations f2fs_symlink_inode_operations = {
  669. .readlink = generic_readlink,
  670. .follow_link = f2fs_follow_link,
  671. .put_link = page_put_link,
  672. .getattr = f2fs_getattr,
  673. .setattr = f2fs_setattr,
  674. #ifdef CONFIG_F2FS_FS_XATTR
  675. .setxattr = generic_setxattr,
  676. .getxattr = generic_getxattr,
  677. .listxattr = f2fs_listxattr,
  678. .removexattr = generic_removexattr,
  679. #endif
  680. };
  681. const struct inode_operations f2fs_special_inode_operations = {
  682. .getattr = f2fs_getattr,
  683. .setattr = f2fs_setattr,
  684. .get_acl = f2fs_get_acl,
  685. .set_acl = f2fs_set_acl,
  686. #ifdef CONFIG_F2FS_FS_XATTR
  687. .setxattr = generic_setxattr,
  688. .getxattr = generic_getxattr,
  689. .listxattr = f2fs_listxattr,
  690. .removexattr = generic_removexattr,
  691. #endif
  692. };