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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> |
9a59f452 | 28 | #include <linux/posix_acl.h> |
1da177e4 | 29 | #include <asm/uaccess.h> |
8fc2751b | 30 | #include <linux/seq_file.h> |
1da177e4 LT |
31 | |
32 | #include "jfs_incore.h" | |
33 | #include "jfs_filsys.h" | |
1868f4aa | 34 | #include "jfs_inode.h" |
1da177e4 LT |
35 | #include "jfs_metapage.h" |
36 | #include "jfs_superblock.h" | |
37 | #include "jfs_dmap.h" | |
38 | #include "jfs_imap.h" | |
39 | #include "jfs_acl.h" | |
40 | #include "jfs_debug.h" | |
41 | ||
42 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
43 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
46 | static kmem_cache_t * jfs_inode_cachep; | |
47 | ||
48 | static struct super_operations jfs_super_operations; | |
49 | static struct export_operations jfs_export_operations; | |
50 | static struct file_system_type jfs_fs_type; | |
51 | ||
52 | #define MAX_COMMIT_THREADS 64 | |
53 | static int commit_threads = 0; | |
54 | module_param(commit_threads, int, 0); | |
55 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
56 | ||
57 | int jfs_stop_threads; | |
58 | static pid_t jfsIOthread; | |
59 | static pid_t jfsCommitThread[MAX_COMMIT_THREADS]; | |
60 | static pid_t jfsSyncThread; | |
61 | DECLARE_COMPLETION(jfsIOwait); | |
62 | ||
63 | #ifdef CONFIG_JFS_DEBUG | |
64 | int jfsloglevel = JFS_LOGLEVEL_WARN; | |
65 | module_param(jfsloglevel, int, 0644); | |
66 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); | |
67 | #endif | |
68 | ||
1da177e4 LT |
69 | static void jfs_handle_error(struct super_block *sb) |
70 | { | |
71 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
72 | ||
73 | if (sb->s_flags & MS_RDONLY) | |
74 | return; | |
75 | ||
76 | updateSuper(sb, FM_DIRTY); | |
77 | ||
78 | if (sbi->flag & JFS_ERR_PANIC) | |
79 | panic("JFS (device %s): panic forced after error\n", | |
80 | sb->s_id); | |
81 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { | |
82 | jfs_err("ERROR: (device %s): remounting filesystem " | |
83 | "as read-only\n", | |
84 | sb->s_id); | |
85 | sb->s_flags |= MS_RDONLY; | |
86 | } | |
87 | ||
88 | /* nothing is done for continue beyond marking the superblock dirty */ | |
89 | } | |
90 | ||
91 | void jfs_error(struct super_block *sb, const char * function, ...) | |
92 | { | |
93 | static char error_buf[256]; | |
94 | va_list args; | |
95 | ||
96 | va_start(args, function); | |
97 | vsprintf(error_buf, function, args); | |
98 | va_end(args); | |
99 | ||
100 | printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); | |
101 | ||
102 | jfs_handle_error(sb); | |
103 | } | |
104 | ||
105 | static struct inode *jfs_alloc_inode(struct super_block *sb) | |
106 | { | |
107 | struct jfs_inode_info *jfs_inode; | |
108 | ||
109 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); | |
110 | if (!jfs_inode) | |
111 | return NULL; | |
112 | return &jfs_inode->vfs_inode; | |
113 | } | |
114 | ||
115 | static void jfs_destroy_inode(struct inode *inode) | |
116 | { | |
117 | struct jfs_inode_info *ji = JFS_IP(inode); | |
118 | ||
8a9cd6d6 DK |
119 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
120 | ||
1da177e4 LT |
121 | spin_lock_irq(&ji->ag_lock); |
122 | if (ji->active_ag != -1) { | |
123 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
124 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
125 | ji->active_ag = -1; | |
126 | } | |
127 | spin_unlock_irq(&ji->ag_lock); | |
128 | ||
129 | #ifdef CONFIG_JFS_POSIX_ACL | |
130 | if (ji->i_acl != JFS_ACL_NOT_CACHED) { | |
131 | posix_acl_release(ji->i_acl); | |
132 | ji->i_acl = JFS_ACL_NOT_CACHED; | |
133 | } | |
134 | if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { | |
135 | posix_acl_release(ji->i_default_acl); | |
136 | ji->i_default_acl = JFS_ACL_NOT_CACHED; | |
137 | } | |
138 | #endif | |
139 | ||
140 | kmem_cache_free(jfs_inode_cachep, ji); | |
141 | } | |
142 | ||
143 | static int jfs_statfs(struct super_block *sb, struct kstatfs *buf) | |
144 | { | |
145 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
146 | s64 maxinodes; | |
147 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
148 | ||
149 | jfs_info("In jfs_statfs"); | |
150 | buf->f_type = JFS_SUPER_MAGIC; | |
151 | buf->f_bsize = sbi->bsize; | |
152 | buf->f_blocks = sbi->bmap->db_mapsize; | |
153 | buf->f_bfree = sbi->bmap->db_nfree; | |
154 | buf->f_bavail = sbi->bmap->db_nfree; | |
155 | /* | |
156 | * If we really return the number of allocated & free inodes, some | |
157 | * applications will fail because they won't see enough free inodes. | |
158 | * We'll try to calculate some guess as to how may inodes we can | |
159 | * really allocate | |
160 | * | |
161 | * buf->f_files = atomic_read(&imap->im_numinos); | |
162 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
163 | */ | |
164 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
165 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
166 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
167 | buf->f_files = maxinodes; | |
168 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
169 | atomic_read(&imap->im_numfree)); | |
170 | ||
171 | buf->f_namelen = JFS_NAME_MAX; | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static void jfs_put_super(struct super_block *sb) | |
176 | { | |
177 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
178 | int rc; | |
179 | ||
180 | jfs_info("In jfs_put_super"); | |
181 | rc = jfs_umount(sb); | |
182 | if (rc) | |
183 | jfs_err("jfs_umount failed with return code %d", rc); | |
184 | if (sbi->nls_tab) | |
185 | unload_nls(sbi->nls_tab); | |
186 | sbi->nls_tab = NULL; | |
187 | ||
7fab479b DK |
188 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
189 | iput(sbi->direct_inode); | |
190 | sbi->direct_inode = NULL; | |
191 | ||
1da177e4 LT |
192 | kfree(sbi); |
193 | } | |
194 | ||
195 | enum { | |
196 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b MB |
197 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
198 | Opt_usrquota, Opt_grpquota | |
1da177e4 LT |
199 | }; |
200 | ||
201 | static match_table_t tokens = { | |
202 | {Opt_integrity, "integrity"}, | |
203 | {Opt_nointegrity, "nointegrity"}, | |
204 | {Opt_iocharset, "iocharset=%s"}, | |
205 | {Opt_resize, "resize=%u"}, | |
206 | {Opt_resize_nosize, "resize"}, | |
207 | {Opt_errors, "errors=%s"}, | |
208 | {Opt_ignore, "noquota"}, | |
209 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
210 | {Opt_usrquota, "usrquota"}, |
211 | {Opt_grpquota, "grpquota"}, | |
1da177e4 LT |
212 | {Opt_err, NULL} |
213 | }; | |
214 | ||
215 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
216 | int *flag) | |
217 | { | |
218 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
219 | char *p; | |
220 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
221 | ||
222 | *newLVSize = 0; | |
223 | ||
224 | if (!options) | |
225 | return 1; | |
226 | ||
227 | while ((p = strsep(&options, ",")) != NULL) { | |
228 | substring_t args[MAX_OPT_ARGS]; | |
229 | int token; | |
230 | if (!*p) | |
231 | continue; | |
232 | ||
233 | token = match_token(p, tokens, args); | |
234 | switch (token) { | |
235 | case Opt_integrity: | |
236 | *flag &= ~JFS_NOINTEGRITY; | |
237 | break; | |
238 | case Opt_nointegrity: | |
239 | *flag |= JFS_NOINTEGRITY; | |
240 | break; | |
241 | case Opt_ignore: | |
242 | /* Silently ignore the quota options */ | |
243 | /* Don't do anything ;-) */ | |
244 | break; | |
245 | case Opt_iocharset: | |
246 | if (nls_map && nls_map != (void *) -1) | |
247 | unload_nls(nls_map); | |
248 | if (!strcmp(args[0].from, "none")) | |
249 | nls_map = NULL; | |
250 | else { | |
251 | nls_map = load_nls(args[0].from); | |
252 | if (!nls_map) { | |
253 | printk(KERN_ERR | |
254 | "JFS: charset not found\n"); | |
255 | goto cleanup; | |
256 | } | |
257 | } | |
258 | break; | |
259 | case Opt_resize: | |
260 | { | |
261 | char *resize = args[0].from; | |
262 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
263 | break; | |
264 | } | |
265 | case Opt_resize_nosize: | |
266 | { | |
267 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
268 | sb->s_blocksize_bits; | |
269 | if (*newLVSize == 0) | |
270 | printk(KERN_ERR | |
271 | "JFS: Cannot determine volume size\n"); | |
272 | break; | |
273 | } | |
274 | case Opt_errors: | |
275 | { | |
276 | char *errors = args[0].from; | |
277 | if (!errors || !*errors) | |
278 | goto cleanup; | |
279 | if (!strcmp(errors, "continue")) { | |
280 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
281 | *flag &= ~JFS_ERR_PANIC; | |
282 | *flag |= JFS_ERR_CONTINUE; | |
283 | } else if (!strcmp(errors, "remount-ro")) { | |
284 | *flag &= ~JFS_ERR_CONTINUE; | |
285 | *flag &= ~JFS_ERR_PANIC; | |
286 | *flag |= JFS_ERR_REMOUNT_RO; | |
287 | } else if (!strcmp(errors, "panic")) { | |
288 | *flag &= ~JFS_ERR_CONTINUE; | |
289 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
290 | *flag |= JFS_ERR_PANIC; | |
291 | } else { | |
292 | printk(KERN_ERR | |
293 | "JFS: %s is an invalid error handler\n", | |
294 | errors); | |
295 | goto cleanup; | |
296 | } | |
297 | break; | |
298 | } | |
8fc2751b MB |
299 | |
300 | #if defined(CONFIG_QUOTA) | |
301 | case Opt_quota: | |
302 | case Opt_usrquota: | |
303 | *flag |= JFS_USRQUOTA; | |
304 | break; | |
305 | case Opt_grpquota: | |
306 | *flag |= JFS_GRPQUOTA; | |
307 | break; | |
308 | #else | |
309 | case Opt_usrquota: | |
310 | case Opt_grpquota: | |
311 | case Opt_quota: | |
312 | printk(KERN_ERR | |
313 | "JFS: quota operations not supported\n"); | |
314 | break; | |
315 | #endif | |
316 | ||
1da177e4 LT |
317 | default: |
318 | printk("jfs: Unrecognized mount option \"%s\" " | |
319 | " or missing value\n", p); | |
320 | goto cleanup; | |
321 | } | |
322 | } | |
323 | ||
324 | if (nls_map != (void *) -1) { | |
325 | /* Discard old (if remount) */ | |
326 | if (sbi->nls_tab) | |
327 | unload_nls(sbi->nls_tab); | |
328 | sbi->nls_tab = nls_map; | |
329 | } | |
330 | return 1; | |
331 | ||
332 | cleanup: | |
333 | if (nls_map && nls_map != (void *) -1) | |
334 | unload_nls(nls_map); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
339 | { | |
340 | s64 newLVSize = 0; | |
341 | int rc = 0; | |
342 | int flag = JFS_SBI(sb)->flag; | |
343 | ||
344 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
345 | return -EINVAL; | |
346 | } | |
347 | if (newLVSize) { | |
348 | if (sb->s_flags & MS_RDONLY) { | |
349 | printk(KERN_ERR | |
350 | "JFS: resize requires volume to be mounted read-write\n"); | |
351 | return -EROFS; | |
352 | } | |
353 | rc = jfs_extendfs(sb, newLVSize, 0); | |
354 | if (rc) | |
355 | return rc; | |
356 | } | |
357 | ||
358 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
359 | /* |
360 | * Invalidate any previously read metadata. fsck may have | |
361 | * changed the on-disk data since we mounted r/o | |
362 | */ | |
363 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
364 | ||
1da177e4 LT |
365 | JFS_SBI(sb)->flag = flag; |
366 | return jfs_mount_rw(sb, 1); | |
367 | } | |
368 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
369 | rc = jfs_umount_rw(sb); | |
370 | JFS_SBI(sb)->flag = flag; | |
371 | return rc; | |
372 | } | |
373 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
374 | if (!(sb->s_flags & MS_RDONLY)) { | |
375 | rc = jfs_umount_rw(sb); | |
376 | if (rc) | |
377 | return rc; | |
378 | JFS_SBI(sb)->flag = flag; | |
379 | return jfs_mount_rw(sb, 1); | |
380 | } | |
381 | JFS_SBI(sb)->flag = flag; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
387 | { | |
388 | struct jfs_sb_info *sbi; | |
389 | struct inode *inode; | |
390 | int rc; | |
391 | s64 newLVSize = 0; | |
392 | int flag; | |
393 | ||
394 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
395 | ||
396 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | |
397 | return -EOVERFLOW; | |
398 | ||
399 | sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); | |
400 | if (!sbi) | |
401 | return -ENOSPC; | |
402 | memset(sbi, 0, sizeof (struct jfs_sb_info)); | |
403 | sb->s_fs_info = sbi; | |
404 | sbi->sb = sb; | |
405 | ||
406 | /* initialize the mount flag and determine the default error handler */ | |
407 | flag = JFS_ERR_REMOUNT_RO; | |
408 | ||
409 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { | |
410 | kfree(sbi); | |
411 | return -EINVAL; | |
412 | } | |
413 | sbi->flag = flag; | |
414 | ||
415 | #ifdef CONFIG_JFS_POSIX_ACL | |
416 | sb->s_flags |= MS_POSIXACL; | |
417 | #endif | |
418 | ||
419 | if (newLVSize) { | |
420 | printk(KERN_ERR "resize option for remount only\n"); | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | /* | |
425 | * Initialize blocksize to 4K. | |
426 | */ | |
427 | sb_set_blocksize(sb, PSIZE); | |
428 | ||
429 | /* | |
430 | * Set method vectors. | |
431 | */ | |
432 | sb->s_op = &jfs_super_operations; | |
433 | sb->s_export_op = &jfs_export_operations; | |
434 | ||
7fab479b DK |
435 | /* |
436 | * Initialize direct-mapping inode/address-space | |
437 | */ | |
438 | inode = new_inode(sb); | |
439 | if (inode == NULL) | |
440 | goto out_kfree; | |
441 | inode->i_ino = 0; | |
442 | inode->i_nlink = 1; | |
443 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
444 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 445 | insert_inode_hash(inode); |
7fab479b DK |
446 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
447 | ||
448 | sbi->direct_inode = inode; | |
449 | ||
1da177e4 LT |
450 | rc = jfs_mount(sb); |
451 | if (rc) { | |
452 | if (!silent) { | |
453 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
454 | } | |
7fab479b | 455 | goto out_mount_failed; |
1da177e4 LT |
456 | } |
457 | if (sb->s_flags & MS_RDONLY) | |
458 | sbi->log = NULL; | |
459 | else { | |
460 | rc = jfs_mount_rw(sb, 0); | |
461 | if (rc) { | |
462 | if (!silent) { | |
463 | jfs_err("jfs_mount_rw failed, return code = %d", | |
464 | rc); | |
465 | } | |
466 | goto out_no_rw; | |
467 | } | |
468 | } | |
469 | ||
470 | sb->s_magic = JFS_SUPER_MAGIC; | |
471 | ||
472 | inode = iget(sb, ROOT_I); | |
473 | if (!inode || is_bad_inode(inode)) | |
474 | goto out_no_root; | |
475 | sb->s_root = d_alloc_root(inode); | |
476 | if (!sb->s_root) | |
477 | goto out_no_root; | |
478 | ||
479 | if (sbi->mntflag & JFS_OS2) | |
480 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
481 | ||
482 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
483 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
484 | #if BITS_PER_LONG == 32 | |
485 | /* | |
486 | * Page cache is indexed by long. | |
487 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
488 | */ | |
489 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); | |
490 | #endif | |
491 | sb->s_time_gran = 1; | |
492 | return 0; | |
493 | ||
494 | out_no_root: | |
495 | jfs_err("jfs_read_super: get root inode failed"); | |
496 | if (inode) | |
497 | iput(inode); | |
498 | ||
499 | out_no_rw: | |
500 | rc = jfs_umount(sb); | |
501 | if (rc) { | |
502 | jfs_err("jfs_umount failed with return code %d", rc); | |
503 | } | |
7fab479b DK |
504 | out_mount_failed: |
505 | filemap_fdatawrite(sbi->direct_inode->i_mapping); | |
506 | filemap_fdatawait(sbi->direct_inode->i_mapping); | |
507 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); | |
508 | make_bad_inode(sbi->direct_inode); | |
509 | iput(sbi->direct_inode); | |
510 | sbi->direct_inode = NULL; | |
1da177e4 LT |
511 | out_kfree: |
512 | if (sbi->nls_tab) | |
513 | unload_nls(sbi->nls_tab); | |
514 | kfree(sbi); | |
515 | return -EINVAL; | |
516 | } | |
517 | ||
518 | static void jfs_write_super_lockfs(struct super_block *sb) | |
519 | { | |
520 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
521 | struct jfs_log *log = sbi->log; | |
522 | ||
523 | if (!(sb->s_flags & MS_RDONLY)) { | |
524 | txQuiesce(sb); | |
525 | lmLogShutdown(log); | |
526 | updateSuper(sb, FM_CLEAN); | |
527 | } | |
528 | } | |
529 | ||
530 | static void jfs_unlockfs(struct super_block *sb) | |
531 | { | |
532 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
533 | struct jfs_log *log = sbi->log; | |
534 | int rc = 0; | |
535 | ||
536 | if (!(sb->s_flags & MS_RDONLY)) { | |
537 | updateSuper(sb, FM_MOUNT); | |
538 | if ((rc = lmLogInit(log))) | |
539 | jfs_err("jfs_unlock failed with return code %d", rc); | |
540 | else | |
541 | txResume(sb); | |
542 | } | |
543 | } | |
544 | ||
545 | static struct super_block *jfs_get_sb(struct file_system_type *fs_type, | |
546 | int flags, const char *dev_name, void *data) | |
547 | { | |
548 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super); | |
549 | } | |
550 | ||
551 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
552 | { | |
553 | struct jfs_log *log = JFS_SBI(sb)->log; | |
554 | ||
555 | /* log == NULL indicates read-only mount */ | |
1c627829 | 556 | if (log) { |
1da177e4 | 557 | jfs_flush_journal(log, wait); |
cbc3d65e | 558 | jfs_syncpt(log, 0); |
1c627829 | 559 | } |
1da177e4 LT |
560 | |
561 | return 0; | |
562 | } | |
563 | ||
8fc2751b MB |
564 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
565 | { | |
566 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
567 | ||
568 | if (sbi->flag & JFS_NOINTEGRITY) | |
569 | seq_puts(seq, ",nointegrity"); | |
570 | else | |
571 | seq_puts(seq, ",integrity"); | |
572 | ||
573 | #if defined(CONFIG_QUOTA) | |
574 | if (sbi->flag & JFS_USRQUOTA) | |
575 | seq_puts(seq, ",usrquota"); | |
576 | ||
577 | if (sbi->flag & JFS_GRPQUOTA) | |
578 | seq_puts(seq, ",grpquota"); | |
579 | #endif | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
1da177e4 LT |
584 | static struct super_operations jfs_super_operations = { |
585 | .alloc_inode = jfs_alloc_inode, | |
586 | .destroy_inode = jfs_destroy_inode, | |
587 | .read_inode = jfs_read_inode, | |
588 | .dirty_inode = jfs_dirty_inode, | |
589 | .write_inode = jfs_write_inode, | |
590 | .delete_inode = jfs_delete_inode, | |
591 | .put_super = jfs_put_super, | |
592 | .sync_fs = jfs_sync_fs, | |
593 | .write_super_lockfs = jfs_write_super_lockfs, | |
594 | .unlockfs = jfs_unlockfs, | |
595 | .statfs = jfs_statfs, | |
596 | .remount_fs = jfs_remount, | |
8fc2751b | 597 | .show_options = jfs_show_options |
1da177e4 LT |
598 | }; |
599 | ||
600 | static struct export_operations jfs_export_operations = { | |
601 | .get_parent = jfs_get_parent, | |
602 | }; | |
603 | ||
604 | static struct file_system_type jfs_fs_type = { | |
605 | .owner = THIS_MODULE, | |
606 | .name = "jfs", | |
607 | .get_sb = jfs_get_sb, | |
608 | .kill_sb = kill_block_super, | |
609 | .fs_flags = FS_REQUIRES_DEV, | |
610 | }; | |
611 | ||
1da177e4 LT |
612 | static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) |
613 | { | |
614 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
615 | ||
616 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | |
617 | SLAB_CTOR_CONSTRUCTOR) { | |
618 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); | |
619 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
620 | init_rwsem(&jfs_ip->rdwrlock); | |
621 | init_MUTEX(&jfs_ip->commit_sem); | |
622 | init_rwsem(&jfs_ip->xattr_sem); | |
623 | spin_lock_init(&jfs_ip->ag_lock); | |
624 | jfs_ip->active_ag = -1; | |
625 | #ifdef CONFIG_JFS_POSIX_ACL | |
626 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; | |
627 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; | |
628 | #endif | |
629 | inode_init_once(&jfs_ip->vfs_inode); | |
630 | } | |
631 | } | |
632 | ||
633 | static int __init init_jfs_fs(void) | |
634 | { | |
635 | int i; | |
636 | int rc; | |
637 | ||
638 | jfs_inode_cachep = | |
639 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, | |
640 | SLAB_RECLAIM_ACCOUNT, init_once, NULL); | |
641 | if (jfs_inode_cachep == NULL) | |
642 | return -ENOMEM; | |
643 | ||
644 | /* | |
645 | * Metapage initialization | |
646 | */ | |
647 | rc = metapage_init(); | |
648 | if (rc) { | |
649 | jfs_err("metapage_init failed w/rc = %d", rc); | |
650 | goto free_slab; | |
651 | } | |
652 | ||
653 | /* | |
654 | * Transaction Manager initialization | |
655 | */ | |
656 | rc = txInit(); | |
657 | if (rc) { | |
658 | jfs_err("txInit failed w/rc = %d", rc); | |
659 | goto free_metapage; | |
660 | } | |
661 | ||
662 | /* | |
663 | * I/O completion thread (endio) | |
664 | */ | |
665 | jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL); | |
666 | if (jfsIOthread < 0) { | |
667 | jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread); | |
668 | goto end_txmngr; | |
669 | } | |
670 | wait_for_completion(&jfsIOwait); /* Wait until thread starts */ | |
671 | ||
672 | if (commit_threads < 1) | |
673 | commit_threads = num_online_cpus(); | |
674 | if (commit_threads > MAX_COMMIT_THREADS) | |
675 | commit_threads = MAX_COMMIT_THREADS; | |
676 | ||
677 | for (i = 0; i < commit_threads; i++) { | |
678 | jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL, | |
679 | CLONE_KERNEL); | |
680 | if (jfsCommitThread[i] < 0) { | |
681 | jfs_err("init_jfs_fs: fork failed w/rc = %d", | |
682 | jfsCommitThread[i]); | |
683 | commit_threads = i; | |
684 | goto kill_committask; | |
685 | } | |
686 | /* Wait until thread starts */ | |
687 | wait_for_completion(&jfsIOwait); | |
688 | } | |
689 | ||
690 | jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL); | |
691 | if (jfsSyncThread < 0) { | |
692 | jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread); | |
693 | goto kill_committask; | |
694 | } | |
695 | wait_for_completion(&jfsIOwait); /* Wait until thread starts */ | |
696 | ||
697 | #ifdef PROC_FS_JFS | |
698 | jfs_proc_init(); | |
699 | #endif | |
700 | ||
701 | return register_filesystem(&jfs_fs_type); | |
702 | ||
703 | kill_committask: | |
704 | jfs_stop_threads = 1; | |
705 | wake_up_all(&jfs_commit_thread_wait); | |
706 | for (i = 0; i < commit_threads; i++) | |
707 | wait_for_completion(&jfsIOwait); | |
708 | ||
709 | wake_up(&jfs_IO_thread_wait); | |
710 | wait_for_completion(&jfsIOwait); /* Wait for thread exit */ | |
711 | end_txmngr: | |
712 | txExit(); | |
713 | free_metapage: | |
714 | metapage_exit(); | |
715 | free_slab: | |
716 | kmem_cache_destroy(jfs_inode_cachep); | |
717 | return rc; | |
718 | } | |
719 | ||
720 | static void __exit exit_jfs_fs(void) | |
721 | { | |
722 | int i; | |
723 | ||
724 | jfs_info("exit_jfs_fs called"); | |
725 | ||
726 | jfs_stop_threads = 1; | |
727 | txExit(); | |
728 | metapage_exit(); | |
729 | wake_up(&jfs_IO_thread_wait); | |
730 | wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */ | |
731 | wake_up_all(&jfs_commit_thread_wait); | |
732 | for (i = 0; i < commit_threads; i++) | |
733 | wait_for_completion(&jfsIOwait); | |
734 | wake_up(&jfs_sync_thread_wait); | |
735 | wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */ | |
736 | #ifdef PROC_FS_JFS | |
737 | jfs_proc_clean(); | |
738 | #endif | |
739 | unregister_filesystem(&jfs_fs_type); | |
740 | kmem_cache_destroy(jfs_inode_cachep); | |
741 | } | |
742 | ||
743 | module_init(init_jfs_fs) | |
744 | module_exit(exit_jfs_fs) |