Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
3 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
13 | * the GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | #include <linux/fs.h> | |
21 | #include <linux/config.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/parser.h> | |
24 | #include <linux/completion.h> | |
25 | #include <linux/vfs.h> | |
8fc2751b | 26 | #include <linux/mount.h> |
1da177e4 | 27 | #include <linux/moduleparam.h> |
91dbb4de | 28 | #include <linux/kthread.h> |
9a59f452 | 29 | #include <linux/posix_acl.h> |
1da177e4 | 30 | #include <asm/uaccess.h> |
8fc2751b | 31 | #include <linux/seq_file.h> |
1da177e4 LT |
32 | |
33 | #include "jfs_incore.h" | |
34 | #include "jfs_filsys.h" | |
1868f4aa | 35 | #include "jfs_inode.h" |
1da177e4 LT |
36 | #include "jfs_metapage.h" |
37 | #include "jfs_superblock.h" | |
38 | #include "jfs_dmap.h" | |
39 | #include "jfs_imap.h" | |
40 | #include "jfs_acl.h" | |
41 | #include "jfs_debug.h" | |
42 | ||
43 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
44 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
45 | MODULE_LICENSE("GPL"); | |
46 | ||
47 | static kmem_cache_t * jfs_inode_cachep; | |
48 | ||
49 | static struct super_operations jfs_super_operations; | |
50 | static struct export_operations jfs_export_operations; | |
51 | static struct file_system_type jfs_fs_type; | |
52 | ||
53 | #define MAX_COMMIT_THREADS 64 | |
54 | static int commit_threads = 0; | |
55 | module_param(commit_threads, int, 0); | |
56 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
57 | ||
91dbb4de CH |
58 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
59 | struct task_struct *jfsIOthread; | |
60 | struct task_struct *jfsSyncThread; | |
1da177e4 LT |
61 | |
62 | #ifdef CONFIG_JFS_DEBUG | |
63 | int jfsloglevel = JFS_LOGLEVEL_WARN; | |
64 | module_param(jfsloglevel, int, 0644); | |
65 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); | |
66 | #endif | |
67 | ||
1da177e4 LT |
68 | static void jfs_handle_error(struct super_block *sb) |
69 | { | |
70 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
71 | ||
72 | if (sb->s_flags & MS_RDONLY) | |
73 | return; | |
74 | ||
75 | updateSuper(sb, FM_DIRTY); | |
76 | ||
77 | if (sbi->flag & JFS_ERR_PANIC) | |
78 | panic("JFS (device %s): panic forced after error\n", | |
79 | sb->s_id); | |
80 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { | |
81 | jfs_err("ERROR: (device %s): remounting filesystem " | |
82 | "as read-only\n", | |
83 | sb->s_id); | |
84 | sb->s_flags |= MS_RDONLY; | |
85 | } | |
86 | ||
87 | /* nothing is done for continue beyond marking the superblock dirty */ | |
88 | } | |
89 | ||
90 | void jfs_error(struct super_block *sb, const char * function, ...) | |
91 | { | |
92 | static char error_buf[256]; | |
93 | va_list args; | |
94 | ||
95 | va_start(args, function); | |
96 | vsprintf(error_buf, function, args); | |
97 | va_end(args); | |
98 | ||
99 | printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); | |
100 | ||
101 | jfs_handle_error(sb); | |
102 | } | |
103 | ||
104 | static struct inode *jfs_alloc_inode(struct super_block *sb) | |
105 | { | |
106 | struct jfs_inode_info *jfs_inode; | |
107 | ||
108 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); | |
109 | if (!jfs_inode) | |
110 | return NULL; | |
111 | return &jfs_inode->vfs_inode; | |
112 | } | |
113 | ||
114 | static void jfs_destroy_inode(struct inode *inode) | |
115 | { | |
116 | struct jfs_inode_info *ji = JFS_IP(inode); | |
117 | ||
8a9cd6d6 DK |
118 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
119 | ||
1da177e4 LT |
120 | spin_lock_irq(&ji->ag_lock); |
121 | if (ji->active_ag != -1) { | |
122 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
123 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
124 | ji->active_ag = -1; | |
125 | } | |
126 | spin_unlock_irq(&ji->ag_lock); | |
127 | ||
128 | #ifdef CONFIG_JFS_POSIX_ACL | |
129 | if (ji->i_acl != JFS_ACL_NOT_CACHED) { | |
130 | posix_acl_release(ji->i_acl); | |
131 | ji->i_acl = JFS_ACL_NOT_CACHED; | |
132 | } | |
133 | if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { | |
134 | posix_acl_release(ji->i_default_acl); | |
135 | ji->i_default_acl = JFS_ACL_NOT_CACHED; | |
136 | } | |
137 | #endif | |
138 | ||
139 | kmem_cache_free(jfs_inode_cachep, ji); | |
140 | } | |
141 | ||
142 | static int jfs_statfs(struct super_block *sb, struct kstatfs *buf) | |
143 | { | |
144 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
145 | s64 maxinodes; | |
146 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
147 | ||
148 | jfs_info("In jfs_statfs"); | |
149 | buf->f_type = JFS_SUPER_MAGIC; | |
150 | buf->f_bsize = sbi->bsize; | |
151 | buf->f_blocks = sbi->bmap->db_mapsize; | |
152 | buf->f_bfree = sbi->bmap->db_nfree; | |
153 | buf->f_bavail = sbi->bmap->db_nfree; | |
154 | /* | |
155 | * If we really return the number of allocated & free inodes, some | |
156 | * applications will fail because they won't see enough free inodes. | |
157 | * We'll try to calculate some guess as to how may inodes we can | |
158 | * really allocate | |
159 | * | |
160 | * buf->f_files = atomic_read(&imap->im_numinos); | |
161 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
162 | */ | |
163 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
164 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
165 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
166 | buf->f_files = maxinodes; | |
167 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
168 | atomic_read(&imap->im_numfree)); | |
169 | ||
170 | buf->f_namelen = JFS_NAME_MAX; | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static void jfs_put_super(struct super_block *sb) | |
175 | { | |
176 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
177 | int rc; | |
178 | ||
179 | jfs_info("In jfs_put_super"); | |
180 | rc = jfs_umount(sb); | |
181 | if (rc) | |
182 | jfs_err("jfs_umount failed with return code %d", rc); | |
183 | if (sbi->nls_tab) | |
184 | unload_nls(sbi->nls_tab); | |
185 | sbi->nls_tab = NULL; | |
186 | ||
7fab479b DK |
187 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
188 | iput(sbi->direct_inode); | |
189 | sbi->direct_inode = NULL; | |
190 | ||
1da177e4 LT |
191 | kfree(sbi); |
192 | } | |
193 | ||
194 | enum { | |
195 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b MB |
196 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
197 | Opt_usrquota, Opt_grpquota | |
1da177e4 LT |
198 | }; |
199 | ||
200 | static match_table_t tokens = { | |
201 | {Opt_integrity, "integrity"}, | |
202 | {Opt_nointegrity, "nointegrity"}, | |
203 | {Opt_iocharset, "iocharset=%s"}, | |
204 | {Opt_resize, "resize=%u"}, | |
205 | {Opt_resize_nosize, "resize"}, | |
206 | {Opt_errors, "errors=%s"}, | |
207 | {Opt_ignore, "noquota"}, | |
208 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
209 | {Opt_usrquota, "usrquota"}, |
210 | {Opt_grpquota, "grpquota"}, | |
1da177e4 LT |
211 | {Opt_err, NULL} |
212 | }; | |
213 | ||
214 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
215 | int *flag) | |
216 | { | |
217 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
218 | char *p; | |
219 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
220 | ||
221 | *newLVSize = 0; | |
222 | ||
223 | if (!options) | |
224 | return 1; | |
225 | ||
226 | while ((p = strsep(&options, ",")) != NULL) { | |
227 | substring_t args[MAX_OPT_ARGS]; | |
228 | int token; | |
229 | if (!*p) | |
230 | continue; | |
231 | ||
232 | token = match_token(p, tokens, args); | |
233 | switch (token) { | |
234 | case Opt_integrity: | |
235 | *flag &= ~JFS_NOINTEGRITY; | |
236 | break; | |
237 | case Opt_nointegrity: | |
238 | *flag |= JFS_NOINTEGRITY; | |
239 | break; | |
240 | case Opt_ignore: | |
241 | /* Silently ignore the quota options */ | |
242 | /* Don't do anything ;-) */ | |
243 | break; | |
244 | case Opt_iocharset: | |
245 | if (nls_map && nls_map != (void *) -1) | |
246 | unload_nls(nls_map); | |
247 | if (!strcmp(args[0].from, "none")) | |
248 | nls_map = NULL; | |
249 | else { | |
250 | nls_map = load_nls(args[0].from); | |
251 | if (!nls_map) { | |
252 | printk(KERN_ERR | |
253 | "JFS: charset not found\n"); | |
254 | goto cleanup; | |
255 | } | |
256 | } | |
257 | break; | |
258 | case Opt_resize: | |
259 | { | |
260 | char *resize = args[0].from; | |
261 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
262 | break; | |
263 | } | |
264 | case Opt_resize_nosize: | |
265 | { | |
266 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
267 | sb->s_blocksize_bits; | |
268 | if (*newLVSize == 0) | |
269 | printk(KERN_ERR | |
270 | "JFS: Cannot determine volume size\n"); | |
271 | break; | |
272 | } | |
273 | case Opt_errors: | |
274 | { | |
275 | char *errors = args[0].from; | |
276 | if (!errors || !*errors) | |
277 | goto cleanup; | |
278 | if (!strcmp(errors, "continue")) { | |
279 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
280 | *flag &= ~JFS_ERR_PANIC; | |
281 | *flag |= JFS_ERR_CONTINUE; | |
282 | } else if (!strcmp(errors, "remount-ro")) { | |
283 | *flag &= ~JFS_ERR_CONTINUE; | |
284 | *flag &= ~JFS_ERR_PANIC; | |
285 | *flag |= JFS_ERR_REMOUNT_RO; | |
286 | } else if (!strcmp(errors, "panic")) { | |
287 | *flag &= ~JFS_ERR_CONTINUE; | |
288 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
289 | *flag |= JFS_ERR_PANIC; | |
290 | } else { | |
291 | printk(KERN_ERR | |
292 | "JFS: %s is an invalid error handler\n", | |
293 | errors); | |
294 | goto cleanup; | |
295 | } | |
296 | break; | |
297 | } | |
8fc2751b MB |
298 | |
299 | #if defined(CONFIG_QUOTA) | |
300 | case Opt_quota: | |
301 | case Opt_usrquota: | |
302 | *flag |= JFS_USRQUOTA; | |
303 | break; | |
304 | case Opt_grpquota: | |
305 | *flag |= JFS_GRPQUOTA; | |
306 | break; | |
307 | #else | |
308 | case Opt_usrquota: | |
309 | case Opt_grpquota: | |
310 | case Opt_quota: | |
311 | printk(KERN_ERR | |
312 | "JFS: quota operations not supported\n"); | |
313 | break; | |
314 | #endif | |
315 | ||
1da177e4 LT |
316 | default: |
317 | printk("jfs: Unrecognized mount option \"%s\" " | |
318 | " or missing value\n", p); | |
319 | goto cleanup; | |
320 | } | |
321 | } | |
322 | ||
323 | if (nls_map != (void *) -1) { | |
324 | /* Discard old (if remount) */ | |
325 | if (sbi->nls_tab) | |
326 | unload_nls(sbi->nls_tab); | |
327 | sbi->nls_tab = nls_map; | |
328 | } | |
329 | return 1; | |
330 | ||
331 | cleanup: | |
332 | if (nls_map && nls_map != (void *) -1) | |
333 | unload_nls(nls_map); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
338 | { | |
339 | s64 newLVSize = 0; | |
340 | int rc = 0; | |
341 | int flag = JFS_SBI(sb)->flag; | |
342 | ||
343 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
344 | return -EINVAL; | |
345 | } | |
346 | if (newLVSize) { | |
347 | if (sb->s_flags & MS_RDONLY) { | |
348 | printk(KERN_ERR | |
349 | "JFS: resize requires volume to be mounted read-write\n"); | |
350 | return -EROFS; | |
351 | } | |
352 | rc = jfs_extendfs(sb, newLVSize, 0); | |
353 | if (rc) | |
354 | return rc; | |
355 | } | |
356 | ||
357 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
358 | /* |
359 | * Invalidate any previously read metadata. fsck may have | |
360 | * changed the on-disk data since we mounted r/o | |
361 | */ | |
362 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
363 | ||
1da177e4 LT |
364 | JFS_SBI(sb)->flag = flag; |
365 | return jfs_mount_rw(sb, 1); | |
366 | } | |
367 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
368 | rc = jfs_umount_rw(sb); | |
369 | JFS_SBI(sb)->flag = flag; | |
370 | return rc; | |
371 | } | |
372 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
373 | if (!(sb->s_flags & MS_RDONLY)) { | |
374 | rc = jfs_umount_rw(sb); | |
375 | if (rc) | |
376 | return rc; | |
377 | JFS_SBI(sb)->flag = flag; | |
378 | return jfs_mount_rw(sb, 1); | |
379 | } | |
380 | JFS_SBI(sb)->flag = flag; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
386 | { | |
387 | struct jfs_sb_info *sbi; | |
388 | struct inode *inode; | |
389 | int rc; | |
390 | s64 newLVSize = 0; | |
391 | int flag; | |
392 | ||
393 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
394 | ||
395 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | |
396 | return -EOVERFLOW; | |
397 | ||
5b3030e3 | 398 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
1da177e4 LT |
399 | if (!sbi) |
400 | return -ENOSPC; | |
1da177e4 LT |
401 | sb->s_fs_info = sbi; |
402 | sbi->sb = sb; | |
403 | ||
404 | /* initialize the mount flag and determine the default error handler */ | |
405 | flag = JFS_ERR_REMOUNT_RO; | |
406 | ||
407 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { | |
408 | kfree(sbi); | |
409 | return -EINVAL; | |
410 | } | |
411 | sbi->flag = flag; | |
412 | ||
413 | #ifdef CONFIG_JFS_POSIX_ACL | |
414 | sb->s_flags |= MS_POSIXACL; | |
415 | #endif | |
416 | ||
417 | if (newLVSize) { | |
418 | printk(KERN_ERR "resize option for remount only\n"); | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | /* | |
423 | * Initialize blocksize to 4K. | |
424 | */ | |
425 | sb_set_blocksize(sb, PSIZE); | |
426 | ||
427 | /* | |
428 | * Set method vectors. | |
429 | */ | |
430 | sb->s_op = &jfs_super_operations; | |
431 | sb->s_export_op = &jfs_export_operations; | |
432 | ||
7fab479b DK |
433 | /* |
434 | * Initialize direct-mapping inode/address-space | |
435 | */ | |
436 | inode = new_inode(sb); | |
437 | if (inode == NULL) | |
438 | goto out_kfree; | |
439 | inode->i_ino = 0; | |
440 | inode->i_nlink = 1; | |
441 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
442 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 443 | insert_inode_hash(inode); |
7fab479b DK |
444 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
445 | ||
446 | sbi->direct_inode = inode; | |
447 | ||
1da177e4 LT |
448 | rc = jfs_mount(sb); |
449 | if (rc) { | |
450 | if (!silent) { | |
451 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
452 | } | |
7fab479b | 453 | goto out_mount_failed; |
1da177e4 LT |
454 | } |
455 | if (sb->s_flags & MS_RDONLY) | |
456 | sbi->log = NULL; | |
457 | else { | |
458 | rc = jfs_mount_rw(sb, 0); | |
459 | if (rc) { | |
460 | if (!silent) { | |
461 | jfs_err("jfs_mount_rw failed, return code = %d", | |
462 | rc); | |
463 | } | |
464 | goto out_no_rw; | |
465 | } | |
466 | } | |
467 | ||
468 | sb->s_magic = JFS_SUPER_MAGIC; | |
469 | ||
470 | inode = iget(sb, ROOT_I); | |
471 | if (!inode || is_bad_inode(inode)) | |
472 | goto out_no_root; | |
473 | sb->s_root = d_alloc_root(inode); | |
474 | if (!sb->s_root) | |
475 | goto out_no_root; | |
476 | ||
477 | if (sbi->mntflag & JFS_OS2) | |
478 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
479 | ||
480 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
481 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
482 | #if BITS_PER_LONG == 32 | |
483 | /* | |
484 | * Page cache is indexed by long. | |
485 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
486 | */ | |
487 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); | |
488 | #endif | |
489 | sb->s_time_gran = 1; | |
490 | return 0; | |
491 | ||
492 | out_no_root: | |
493 | jfs_err("jfs_read_super: get root inode failed"); | |
494 | if (inode) | |
495 | iput(inode); | |
496 | ||
497 | out_no_rw: | |
498 | rc = jfs_umount(sb); | |
499 | if (rc) { | |
500 | jfs_err("jfs_umount failed with return code %d", rc); | |
501 | } | |
7fab479b | 502 | out_mount_failed: |
28fd1298 | 503 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
504 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
505 | make_bad_inode(sbi->direct_inode); | |
506 | iput(sbi->direct_inode); | |
507 | sbi->direct_inode = NULL; | |
1da177e4 LT |
508 | out_kfree: |
509 | if (sbi->nls_tab) | |
510 | unload_nls(sbi->nls_tab); | |
511 | kfree(sbi); | |
512 | return -EINVAL; | |
513 | } | |
514 | ||
515 | static void jfs_write_super_lockfs(struct super_block *sb) | |
516 | { | |
517 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
518 | struct jfs_log *log = sbi->log; | |
519 | ||
520 | if (!(sb->s_flags & MS_RDONLY)) { | |
521 | txQuiesce(sb); | |
522 | lmLogShutdown(log); | |
523 | updateSuper(sb, FM_CLEAN); | |
524 | } | |
525 | } | |
526 | ||
527 | static void jfs_unlockfs(struct super_block *sb) | |
528 | { | |
529 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
530 | struct jfs_log *log = sbi->log; | |
531 | int rc = 0; | |
532 | ||
533 | if (!(sb->s_flags & MS_RDONLY)) { | |
534 | updateSuper(sb, FM_MOUNT); | |
535 | if ((rc = lmLogInit(log))) | |
536 | jfs_err("jfs_unlock failed with return code %d", rc); | |
537 | else | |
538 | txResume(sb); | |
539 | } | |
540 | } | |
541 | ||
542 | static struct super_block *jfs_get_sb(struct file_system_type *fs_type, | |
543 | int flags, const char *dev_name, void *data) | |
544 | { | |
545 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super); | |
546 | } | |
547 | ||
548 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
549 | { | |
550 | struct jfs_log *log = JFS_SBI(sb)->log; | |
551 | ||
552 | /* log == NULL indicates read-only mount */ | |
1c627829 | 553 | if (log) { |
1da177e4 | 554 | jfs_flush_journal(log, wait); |
cbc3d65e | 555 | jfs_syncpt(log, 0); |
1c627829 | 556 | } |
1da177e4 LT |
557 | |
558 | return 0; | |
559 | } | |
560 | ||
8fc2751b MB |
561 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
562 | { | |
563 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
564 | ||
565 | if (sbi->flag & JFS_NOINTEGRITY) | |
566 | seq_puts(seq, ",nointegrity"); | |
567 | else | |
568 | seq_puts(seq, ",integrity"); | |
569 | ||
570 | #if defined(CONFIG_QUOTA) | |
571 | if (sbi->flag & JFS_USRQUOTA) | |
572 | seq_puts(seq, ",usrquota"); | |
573 | ||
574 | if (sbi->flag & JFS_GRPQUOTA) | |
575 | seq_puts(seq, ",grpquota"); | |
576 | #endif | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
1da177e4 LT |
581 | static struct super_operations jfs_super_operations = { |
582 | .alloc_inode = jfs_alloc_inode, | |
583 | .destroy_inode = jfs_destroy_inode, | |
584 | .read_inode = jfs_read_inode, | |
585 | .dirty_inode = jfs_dirty_inode, | |
586 | .write_inode = jfs_write_inode, | |
587 | .delete_inode = jfs_delete_inode, | |
588 | .put_super = jfs_put_super, | |
589 | .sync_fs = jfs_sync_fs, | |
590 | .write_super_lockfs = jfs_write_super_lockfs, | |
591 | .unlockfs = jfs_unlockfs, | |
592 | .statfs = jfs_statfs, | |
593 | .remount_fs = jfs_remount, | |
8fc2751b | 594 | .show_options = jfs_show_options |
1da177e4 LT |
595 | }; |
596 | ||
597 | static struct export_operations jfs_export_operations = { | |
598 | .get_parent = jfs_get_parent, | |
599 | }; | |
600 | ||
601 | static struct file_system_type jfs_fs_type = { | |
602 | .owner = THIS_MODULE, | |
603 | .name = "jfs", | |
604 | .get_sb = jfs_get_sb, | |
605 | .kill_sb = kill_block_super, | |
606 | .fs_flags = FS_REQUIRES_DEV, | |
607 | }; | |
608 | ||
1da177e4 LT |
609 | static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) |
610 | { | |
611 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
612 | ||
613 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
614 | SLAB_CTOR_CONSTRUCTOR) { | |
615 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); | |
616 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
617 | init_rwsem(&jfs_ip->rdwrlock); | |
1de87444 | 618 | mutex_init(&jfs_ip->commit_mutex); |
1da177e4 LT |
619 | init_rwsem(&jfs_ip->xattr_sem); |
620 | spin_lock_init(&jfs_ip->ag_lock); | |
621 | jfs_ip->active_ag = -1; | |
622 | #ifdef CONFIG_JFS_POSIX_ACL | |
623 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; | |
624 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; | |
625 | #endif | |
626 | inode_init_once(&jfs_ip->vfs_inode); | |
627 | } | |
628 | } | |
629 | ||
630 | static int __init init_jfs_fs(void) | |
631 | { | |
632 | int i; | |
633 | int rc; | |
634 | ||
635 | jfs_inode_cachep = | |
636 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, | |
637 | SLAB_RECLAIM_ACCOUNT, init_once, NULL); | |
638 | if (jfs_inode_cachep == NULL) | |
639 | return -ENOMEM; | |
640 | ||
641 | /* | |
642 | * Metapage initialization | |
643 | */ | |
644 | rc = metapage_init(); | |
645 | if (rc) { | |
646 | jfs_err("metapage_init failed w/rc = %d", rc); | |
647 | goto free_slab; | |
648 | } | |
649 | ||
650 | /* | |
651 | * Transaction Manager initialization | |
652 | */ | |
653 | rc = txInit(); | |
654 | if (rc) { | |
655 | jfs_err("txInit failed w/rc = %d", rc); | |
656 | goto free_metapage; | |
657 | } | |
658 | ||
659 | /* | |
660 | * I/O completion thread (endio) | |
661 | */ | |
91dbb4de CH |
662 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
663 | if (IS_ERR(jfsIOthread)) { | |
664 | rc = PTR_ERR(jfsIOthread); | |
665 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
666 | goto end_txmngr; |
667 | } | |
1da177e4 LT |
668 | |
669 | if (commit_threads < 1) | |
670 | commit_threads = num_online_cpus(); | |
671 | if (commit_threads > MAX_COMMIT_THREADS) | |
672 | commit_threads = MAX_COMMIT_THREADS; | |
673 | ||
674 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
675 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
676 | if (IS_ERR(jfsCommitThread[i])) { | |
677 | rc = PTR_ERR(jfsCommitThread[i]); | |
678 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
679 | commit_threads = i; |
680 | goto kill_committask; | |
681 | } | |
1da177e4 LT |
682 | } |
683 | ||
91dbb4de CH |
684 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
685 | if (IS_ERR(jfsSyncThread)) { | |
686 | rc = PTR_ERR(jfsSyncThread); | |
687 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
688 | goto kill_committask; |
689 | } | |
1da177e4 LT |
690 | |
691 | #ifdef PROC_FS_JFS | |
692 | jfs_proc_init(); | |
693 | #endif | |
694 | ||
695 | return register_filesystem(&jfs_fs_type); | |
696 | ||
697 | kill_committask: | |
1da177e4 | 698 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
699 | kthread_stop(jfsCommitThread[i]); |
700 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
701 | end_txmngr: |
702 | txExit(); | |
703 | free_metapage: | |
704 | metapage_exit(); | |
705 | free_slab: | |
706 | kmem_cache_destroy(jfs_inode_cachep); | |
707 | return rc; | |
708 | } | |
709 | ||
710 | static void __exit exit_jfs_fs(void) | |
711 | { | |
712 | int i; | |
713 | ||
714 | jfs_info("exit_jfs_fs called"); | |
715 | ||
1da177e4 LT |
716 | txExit(); |
717 | metapage_exit(); | |
91dbb4de CH |
718 | |
719 | kthread_stop(jfsIOthread); | |
1da177e4 | 720 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
721 | kthread_stop(jfsCommitThread[i]); |
722 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
723 | #ifdef PROC_FS_JFS |
724 | jfs_proc_clean(); | |
725 | #endif | |
726 | unregister_filesystem(&jfs_fs_type); | |
727 | kmem_cache_destroy(jfs_inode_cachep); | |
728 | } | |
729 | ||
730 | module_init(init_jfs_fs) | |
731 | module_exit(exit_jfs_fs) |