namei.c 17 KB

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  1. /*
  2. * linux/fs/hpfs/namei.c
  3. *
  4. * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
  5. *
  6. * adding & removing files & directories
  7. */
  8. #include <linux/sched.h>
  9. #include "hpfs_fn.h"
  10. static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
  11. {
  12. const unsigned char *name = dentry->d_name.name;
  13. unsigned len = dentry->d_name.len;
  14. struct quad_buffer_head qbh0;
  15. struct buffer_head *bh;
  16. struct hpfs_dirent *de;
  17. struct fnode *fnode;
  18. struct dnode *dnode;
  19. struct inode *result;
  20. fnode_secno fno;
  21. dnode_secno dno;
  22. int r;
  23. struct hpfs_dirent dee;
  24. int err;
  25. if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
  26. hpfs_lock(dir->i_sb);
  27. err = -ENOSPC;
  28. fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
  29. if (!fnode)
  30. goto bail;
  31. dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0, 1);
  32. if (!dnode)
  33. goto bail1;
  34. memset(&dee, 0, sizeof dee);
  35. dee.directory = 1;
  36. if (!(mode & 0222)) dee.read_only = 1;
  37. /*dee.archive = 0;*/
  38. dee.hidden = name[0] == '.';
  39. dee.fnode = fno;
  40. dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
  41. result = new_inode(dir->i_sb);
  42. if (!result)
  43. goto bail2;
  44. hpfs_init_inode(result);
  45. result->i_ino = fno;
  46. hpfs_i(result)->i_parent_dir = dir->i_ino;
  47. hpfs_i(result)->i_dno = dno;
  48. result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
  49. result->i_ctime.tv_nsec = 0;
  50. result->i_mtime.tv_nsec = 0;
  51. result->i_atime.tv_nsec = 0;
  52. hpfs_i(result)->i_ea_size = 0;
  53. result->i_mode |= S_IFDIR;
  54. result->i_op = &hpfs_dir_iops;
  55. result->i_fop = &hpfs_dir_ops;
  56. result->i_blocks = 4;
  57. result->i_size = 2048;
  58. result->i_nlink = 2;
  59. if (dee.read_only)
  60. result->i_mode &= ~0222;
  61. mutex_lock(&hpfs_i(dir)->i_mutex);
  62. r = hpfs_add_dirent(dir, name, len, &dee, 0);
  63. if (r == 1)
  64. goto bail3;
  65. if (r == -1) {
  66. err = -EEXIST;
  67. goto bail3;
  68. }
  69. fnode->len = len;
  70. memcpy(fnode->name, name, len > 15 ? 15 : len);
  71. fnode->up = dir->i_ino;
  72. fnode->dirflag = 1;
  73. fnode->btree.n_free_nodes = 7;
  74. fnode->btree.n_used_nodes = 1;
  75. fnode->btree.first_free = 0x14;
  76. fnode->u.external[0].disk_secno = dno;
  77. fnode->u.external[0].file_secno = -1;
  78. dnode->root_dnode = 1;
  79. dnode->up = fno;
  80. de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
  81. de->creation_date = de->write_date = de->read_date = gmt_to_local(dir->i_sb, get_seconds());
  82. if (!(mode & 0222)) de->read_only = 1;
  83. de->first = de->directory = 1;
  84. /*de->hidden = de->system = 0;*/
  85. de->fnode = fno;
  86. mark_buffer_dirty(bh);
  87. brelse(bh);
  88. hpfs_mark_4buffers_dirty(&qbh0);
  89. hpfs_brelse4(&qbh0);
  90. inc_nlink(dir);
  91. insert_inode_hash(result);
  92. if (result->i_uid != current_fsuid() ||
  93. result->i_gid != current_fsgid() ||
  94. result->i_mode != (mode | S_IFDIR)) {
  95. result->i_uid = current_fsuid();
  96. result->i_gid = current_fsgid();
  97. result->i_mode = mode | S_IFDIR;
  98. hpfs_write_inode_nolock(result);
  99. }
  100. d_instantiate(dentry, result);
  101. mutex_unlock(&hpfs_i(dir)->i_mutex);
  102. hpfs_unlock(dir->i_sb);
  103. return 0;
  104. bail3:
  105. mutex_unlock(&hpfs_i(dir)->i_mutex);
  106. iput(result);
  107. bail2:
  108. hpfs_brelse4(&qbh0);
  109. hpfs_free_dnode(dir->i_sb, dno);
  110. bail1:
  111. brelse(bh);
  112. hpfs_free_sectors(dir->i_sb, fno, 1);
  113. bail:
  114. hpfs_unlock(dir->i_sb);
  115. return err;
  116. }
  117. static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
  118. {
  119. const unsigned char *name = dentry->d_name.name;
  120. unsigned len = dentry->d_name.len;
  121. struct inode *result = NULL;
  122. struct buffer_head *bh;
  123. struct fnode *fnode;
  124. fnode_secno fno;
  125. int r;
  126. struct hpfs_dirent dee;
  127. int err;
  128. if ((err = hpfs_chk_name(name, &len)))
  129. return err==-ENOENT ? -EINVAL : err;
  130. hpfs_lock(dir->i_sb);
  131. err = -ENOSPC;
  132. fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
  133. if (!fnode)
  134. goto bail;
  135. memset(&dee, 0, sizeof dee);
  136. if (!(mode & 0222)) dee.read_only = 1;
  137. dee.archive = 1;
  138. dee.hidden = name[0] == '.';
  139. dee.fnode = fno;
  140. dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
  141. result = new_inode(dir->i_sb);
  142. if (!result)
  143. goto bail1;
  144. hpfs_init_inode(result);
  145. result->i_ino = fno;
  146. result->i_mode |= S_IFREG;
  147. result->i_mode &= ~0111;
  148. result->i_op = &hpfs_file_iops;
  149. result->i_fop = &hpfs_file_ops;
  150. result->i_nlink = 1;
  151. hpfs_decide_conv(result, name, len);
  152. hpfs_i(result)->i_parent_dir = dir->i_ino;
  153. result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
  154. result->i_ctime.tv_nsec = 0;
  155. result->i_mtime.tv_nsec = 0;
  156. result->i_atime.tv_nsec = 0;
  157. hpfs_i(result)->i_ea_size = 0;
  158. if (dee.read_only)
  159. result->i_mode &= ~0222;
  160. result->i_blocks = 1;
  161. result->i_size = 0;
  162. result->i_data.a_ops = &hpfs_aops;
  163. hpfs_i(result)->mmu_private = 0;
  164. mutex_lock(&hpfs_i(dir)->i_mutex);
  165. r = hpfs_add_dirent(dir, name, len, &dee, 0);
  166. if (r == 1)
  167. goto bail2;
  168. if (r == -1) {
  169. err = -EEXIST;
  170. goto bail2;
  171. }
  172. fnode->len = len;
  173. memcpy(fnode->name, name, len > 15 ? 15 : len);
  174. fnode->up = dir->i_ino;
  175. mark_buffer_dirty(bh);
  176. brelse(bh);
  177. insert_inode_hash(result);
  178. if (result->i_uid != current_fsuid() ||
  179. result->i_gid != current_fsgid() ||
  180. result->i_mode != (mode | S_IFREG)) {
  181. result->i_uid = current_fsuid();
  182. result->i_gid = current_fsgid();
  183. result->i_mode = mode | S_IFREG;
  184. hpfs_write_inode_nolock(result);
  185. }
  186. d_instantiate(dentry, result);
  187. mutex_unlock(&hpfs_i(dir)->i_mutex);
  188. hpfs_unlock(dir->i_sb);
  189. return 0;
  190. bail2:
  191. mutex_unlock(&hpfs_i(dir)->i_mutex);
  192. iput(result);
  193. bail1:
  194. brelse(bh);
  195. hpfs_free_sectors(dir->i_sb, fno, 1);
  196. bail:
  197. hpfs_unlock(dir->i_sb);
  198. return err;
  199. }
  200. static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
  201. {
  202. const unsigned char *name = dentry->d_name.name;
  203. unsigned len = dentry->d_name.len;
  204. struct buffer_head *bh;
  205. struct fnode *fnode;
  206. fnode_secno fno;
  207. int r;
  208. struct hpfs_dirent dee;
  209. struct inode *result = NULL;
  210. int err;
  211. if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
  212. if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
  213. if (!new_valid_dev(rdev))
  214. return -EINVAL;
  215. hpfs_lock(dir->i_sb);
  216. err = -ENOSPC;
  217. fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
  218. if (!fnode)
  219. goto bail;
  220. memset(&dee, 0, sizeof dee);
  221. if (!(mode & 0222)) dee.read_only = 1;
  222. dee.archive = 1;
  223. dee.hidden = name[0] == '.';
  224. dee.fnode = fno;
  225. dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
  226. result = new_inode(dir->i_sb);
  227. if (!result)
  228. goto bail1;
  229. hpfs_init_inode(result);
  230. result->i_ino = fno;
  231. hpfs_i(result)->i_parent_dir = dir->i_ino;
  232. result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
  233. result->i_ctime.tv_nsec = 0;
  234. result->i_mtime.tv_nsec = 0;
  235. result->i_atime.tv_nsec = 0;
  236. hpfs_i(result)->i_ea_size = 0;
  237. result->i_uid = current_fsuid();
  238. result->i_gid = current_fsgid();
  239. result->i_nlink = 1;
  240. result->i_size = 0;
  241. result->i_blocks = 1;
  242. init_special_inode(result, mode, rdev);
  243. mutex_lock(&hpfs_i(dir)->i_mutex);
  244. r = hpfs_add_dirent(dir, name, len, &dee, 0);
  245. if (r == 1)
  246. goto bail2;
  247. if (r == -1) {
  248. err = -EEXIST;
  249. goto bail2;
  250. }
  251. fnode->len = len;
  252. memcpy(fnode->name, name, len > 15 ? 15 : len);
  253. fnode->up = dir->i_ino;
  254. mark_buffer_dirty(bh);
  255. insert_inode_hash(result);
  256. hpfs_write_inode_nolock(result);
  257. d_instantiate(dentry, result);
  258. mutex_unlock(&hpfs_i(dir)->i_mutex);
  259. brelse(bh);
  260. hpfs_unlock(dir->i_sb);
  261. return 0;
  262. bail2:
  263. mutex_unlock(&hpfs_i(dir)->i_mutex);
  264. iput(result);
  265. bail1:
  266. brelse(bh);
  267. hpfs_free_sectors(dir->i_sb, fno, 1);
  268. bail:
  269. hpfs_unlock(dir->i_sb);
  270. return err;
  271. }
  272. static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
  273. {
  274. const unsigned char *name = dentry->d_name.name;
  275. unsigned len = dentry->d_name.len;
  276. struct buffer_head *bh;
  277. struct fnode *fnode;
  278. fnode_secno fno;
  279. int r;
  280. struct hpfs_dirent dee;
  281. struct inode *result;
  282. int err;
  283. if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
  284. hpfs_lock(dir->i_sb);
  285. if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
  286. hpfs_unlock(dir->i_sb);
  287. return -EPERM;
  288. }
  289. err = -ENOSPC;
  290. fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
  291. if (!fnode)
  292. goto bail;
  293. memset(&dee, 0, sizeof dee);
  294. dee.archive = 1;
  295. dee.hidden = name[0] == '.';
  296. dee.fnode = fno;
  297. dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
  298. result = new_inode(dir->i_sb);
  299. if (!result)
  300. goto bail1;
  301. result->i_ino = fno;
  302. hpfs_init_inode(result);
  303. hpfs_i(result)->i_parent_dir = dir->i_ino;
  304. result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
  305. result->i_ctime.tv_nsec = 0;
  306. result->i_mtime.tv_nsec = 0;
  307. result->i_atime.tv_nsec = 0;
  308. hpfs_i(result)->i_ea_size = 0;
  309. result->i_mode = S_IFLNK | 0777;
  310. result->i_uid = current_fsuid();
  311. result->i_gid = current_fsgid();
  312. result->i_blocks = 1;
  313. result->i_nlink = 1;
  314. result->i_size = strlen(symlink);
  315. result->i_op = &page_symlink_inode_operations;
  316. result->i_data.a_ops = &hpfs_symlink_aops;
  317. mutex_lock(&hpfs_i(dir)->i_mutex);
  318. r = hpfs_add_dirent(dir, name, len, &dee, 0);
  319. if (r == 1)
  320. goto bail2;
  321. if (r == -1) {
  322. err = -EEXIST;
  323. goto bail2;
  324. }
  325. fnode->len = len;
  326. memcpy(fnode->name, name, len > 15 ? 15 : len);
  327. fnode->up = dir->i_ino;
  328. hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
  329. mark_buffer_dirty(bh);
  330. brelse(bh);
  331. insert_inode_hash(result);
  332. hpfs_write_inode_nolock(result);
  333. d_instantiate(dentry, result);
  334. mutex_unlock(&hpfs_i(dir)->i_mutex);
  335. hpfs_unlock(dir->i_sb);
  336. return 0;
  337. bail2:
  338. mutex_unlock(&hpfs_i(dir)->i_mutex);
  339. iput(result);
  340. bail1:
  341. brelse(bh);
  342. hpfs_free_sectors(dir->i_sb, fno, 1);
  343. bail:
  344. hpfs_unlock(dir->i_sb);
  345. return err;
  346. }
  347. static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
  348. {
  349. const unsigned char *name = dentry->d_name.name;
  350. unsigned len = dentry->d_name.len;
  351. struct quad_buffer_head qbh;
  352. struct hpfs_dirent *de;
  353. struct inode *inode = dentry->d_inode;
  354. dnode_secno dno;
  355. fnode_secno fno;
  356. int r;
  357. int rep = 0;
  358. int err;
  359. hpfs_lock(dir->i_sb);
  360. hpfs_adjust_length(name, &len);
  361. again:
  362. mutex_lock(&hpfs_i(inode)->i_parent_mutex);
  363. mutex_lock(&hpfs_i(dir)->i_mutex);
  364. err = -ENOENT;
  365. de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
  366. if (!de)
  367. goto out;
  368. err = -EPERM;
  369. if (de->first)
  370. goto out1;
  371. err = -EISDIR;
  372. if (de->directory)
  373. goto out1;
  374. fno = de->fnode;
  375. r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
  376. switch (r) {
  377. case 1:
  378. hpfs_error(dir->i_sb, "there was error when removing dirent");
  379. err = -EFSERROR;
  380. break;
  381. case 2: /* no space for deleting, try to truncate file */
  382. err = -ENOSPC;
  383. if (rep++)
  384. break;
  385. mutex_unlock(&hpfs_i(dir)->i_mutex);
  386. mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
  387. dentry_unhash(dentry);
  388. if (!d_unhashed(dentry)) {
  389. dput(dentry);
  390. hpfs_unlock(dir->i_sb);
  391. return -ENOSPC;
  392. }
  393. if (generic_permission(inode, MAY_WRITE, 0, NULL) ||
  394. !S_ISREG(inode->i_mode) ||
  395. get_write_access(inode)) {
  396. d_rehash(dentry);
  397. dput(dentry);
  398. } else {
  399. struct iattr newattrs;
  400. /*printk("HPFS: truncating file before delete.\n");*/
  401. newattrs.ia_size = 0;
  402. newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
  403. err = notify_change(dentry, &newattrs);
  404. put_write_access(inode);
  405. dput(dentry);
  406. if (!err)
  407. goto again;
  408. }
  409. hpfs_unlock(dir->i_sb);
  410. return -ENOSPC;
  411. default:
  412. drop_nlink(inode);
  413. err = 0;
  414. }
  415. goto out;
  416. out1:
  417. hpfs_brelse4(&qbh);
  418. out:
  419. mutex_unlock(&hpfs_i(dir)->i_mutex);
  420. mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
  421. hpfs_unlock(dir->i_sb);
  422. return err;
  423. }
  424. static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
  425. {
  426. const unsigned char *name = dentry->d_name.name;
  427. unsigned len = dentry->d_name.len;
  428. struct quad_buffer_head qbh;
  429. struct hpfs_dirent *de;
  430. struct inode *inode = dentry->d_inode;
  431. dnode_secno dno;
  432. fnode_secno fno;
  433. int n_items = 0;
  434. int err;
  435. int r;
  436. hpfs_adjust_length(name, &len);
  437. hpfs_lock(dir->i_sb);
  438. mutex_lock(&hpfs_i(inode)->i_parent_mutex);
  439. mutex_lock(&hpfs_i(dir)->i_mutex);
  440. err = -ENOENT;
  441. de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
  442. if (!de)
  443. goto out;
  444. err = -EPERM;
  445. if (de->first)
  446. goto out1;
  447. err = -ENOTDIR;
  448. if (!de->directory)
  449. goto out1;
  450. hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
  451. err = -ENOTEMPTY;
  452. if (n_items)
  453. goto out1;
  454. fno = de->fnode;
  455. r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
  456. switch (r) {
  457. case 1:
  458. hpfs_error(dir->i_sb, "there was error when removing dirent");
  459. err = -EFSERROR;
  460. break;
  461. case 2:
  462. err = -ENOSPC;
  463. break;
  464. default:
  465. drop_nlink(dir);
  466. clear_nlink(inode);
  467. err = 0;
  468. }
  469. goto out;
  470. out1:
  471. hpfs_brelse4(&qbh);
  472. out:
  473. mutex_unlock(&hpfs_i(dir)->i_mutex);
  474. mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
  475. hpfs_unlock(dir->i_sb);
  476. return err;
  477. }
  478. static int hpfs_symlink_readpage(struct file *file, struct page *page)
  479. {
  480. char *link = kmap(page);
  481. struct inode *i = page->mapping->host;
  482. struct fnode *fnode;
  483. struct buffer_head *bh;
  484. int err;
  485. err = -EIO;
  486. hpfs_lock(i->i_sb);
  487. if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
  488. goto fail;
  489. err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
  490. brelse(bh);
  491. if (err)
  492. goto fail;
  493. hpfs_unlock(i->i_sb);
  494. SetPageUptodate(page);
  495. kunmap(page);
  496. unlock_page(page);
  497. return 0;
  498. fail:
  499. hpfs_unlock(i->i_sb);
  500. SetPageError(page);
  501. kunmap(page);
  502. unlock_page(page);
  503. return err;
  504. }
  505. const struct address_space_operations hpfs_symlink_aops = {
  506. .readpage = hpfs_symlink_readpage
  507. };
  508. static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
  509. struct inode *new_dir, struct dentry *new_dentry)
  510. {
  511. const unsigned char *old_name = old_dentry->d_name.name;
  512. unsigned old_len = old_dentry->d_name.len;
  513. const unsigned char *new_name = new_dentry->d_name.name;
  514. unsigned new_len = new_dentry->d_name.len;
  515. struct inode *i = old_dentry->d_inode;
  516. struct inode *new_inode = new_dentry->d_inode;
  517. struct quad_buffer_head qbh, qbh1;
  518. struct hpfs_dirent *dep, *nde;
  519. struct hpfs_dirent de;
  520. dnode_secno dno;
  521. int r;
  522. struct buffer_head *bh;
  523. struct fnode *fnode;
  524. int err;
  525. if ((err = hpfs_chk_name(new_name, &new_len))) return err;
  526. err = 0;
  527. hpfs_adjust_length(old_name, &old_len);
  528. hpfs_lock(i->i_sb);
  529. /* order doesn't matter, due to VFS exclusion */
  530. mutex_lock(&hpfs_i(i)->i_parent_mutex);
  531. if (new_inode)
  532. mutex_lock(&hpfs_i(new_inode)->i_parent_mutex);
  533. mutex_lock(&hpfs_i(old_dir)->i_mutex);
  534. if (new_dir != old_dir)
  535. mutex_lock(&hpfs_i(new_dir)->i_mutex);
  536. /* Erm? Moving over the empty non-busy directory is perfectly legal */
  537. if (new_inode && S_ISDIR(new_inode->i_mode)) {
  538. err = -EINVAL;
  539. goto end1;
  540. }
  541. if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
  542. hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
  543. err = -ENOENT;
  544. goto end1;
  545. }
  546. copy_de(&de, dep);
  547. de.hidden = new_name[0] == '.';
  548. if (new_inode) {
  549. int r;
  550. if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
  551. if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
  552. clear_nlink(new_inode);
  553. copy_de(nde, &de);
  554. memcpy(nde->name, new_name, new_len);
  555. hpfs_mark_4buffers_dirty(&qbh1);
  556. hpfs_brelse4(&qbh1);
  557. goto end;
  558. }
  559. hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
  560. err = -EFSERROR;
  561. goto end1;
  562. }
  563. err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
  564. goto end1;
  565. }
  566. if (new_dir == old_dir) hpfs_brelse4(&qbh);
  567. hpfs_lock_creation(i->i_sb);
  568. if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de, 1))) {
  569. hpfs_unlock_creation(i->i_sb);
  570. if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
  571. err = r == 1 ? -ENOSPC : -EFSERROR;
  572. if (new_dir != old_dir) hpfs_brelse4(&qbh);
  573. goto end1;
  574. }
  575. if (new_dir == old_dir)
  576. if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
  577. hpfs_unlock_creation(i->i_sb);
  578. hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
  579. err = -ENOENT;
  580. goto end1;
  581. }
  582. if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
  583. hpfs_unlock_creation(i->i_sb);
  584. hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
  585. err = r == 2 ? -ENOSPC : -EFSERROR;
  586. goto end1;
  587. }
  588. hpfs_unlock_creation(i->i_sb);
  589. end:
  590. hpfs_i(i)->i_parent_dir = new_dir->i_ino;
  591. if (S_ISDIR(i->i_mode)) {
  592. inc_nlink(new_dir);
  593. drop_nlink(old_dir);
  594. }
  595. if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
  596. fnode->up = new_dir->i_ino;
  597. fnode->len = new_len;
  598. memcpy(fnode->name, new_name, new_len>15?15:new_len);
  599. if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
  600. mark_buffer_dirty(bh);
  601. brelse(bh);
  602. }
  603. hpfs_i(i)->i_conv = hpfs_sb(i->i_sb)->sb_conv;
  604. hpfs_decide_conv(i, new_name, new_len);
  605. end1:
  606. if (old_dir != new_dir)
  607. mutex_unlock(&hpfs_i(new_dir)->i_mutex);
  608. mutex_unlock(&hpfs_i(old_dir)->i_mutex);
  609. mutex_unlock(&hpfs_i(i)->i_parent_mutex);
  610. if (new_inode)
  611. mutex_unlock(&hpfs_i(new_inode)->i_parent_mutex);
  612. hpfs_unlock(i->i_sb);
  613. return err;
  614. }
  615. const struct inode_operations hpfs_dir_iops =
  616. {
  617. .create = hpfs_create,
  618. .lookup = hpfs_lookup,
  619. .unlink = hpfs_unlink,
  620. .symlink = hpfs_symlink,
  621. .mkdir = hpfs_mkdir,
  622. .rmdir = hpfs_rmdir,
  623. .mknod = hpfs_mknod,
  624. .rename = hpfs_rename,
  625. .setattr = hpfs_setattr,
  626. };