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