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