diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/jfs/super.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/jfs/super.c')
-rw-r--r-- | fs/jfs/super.c | 700 |
1 files changed, 700 insertions, 0 deletions
diff --git a/fs/jfs/super.c b/fs/jfs/super.c new file mode 100644 index 000000000000..5856866e24fc --- /dev/null +++ b/fs/jfs/super.c | |||
@@ -0,0 +1,700 @@ | |||
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 | |||
213 | kfree(sbi); | ||
214 | } | ||
215 | |||
216 | enum { | ||
217 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | ||
218 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, | ||
219 | }; | ||
220 | |||
221 | static match_table_t tokens = { | ||
222 | {Opt_integrity, "integrity"}, | ||
223 | {Opt_nointegrity, "nointegrity"}, | ||
224 | {Opt_iocharset, "iocharset=%s"}, | ||
225 | {Opt_resize, "resize=%u"}, | ||
226 | {Opt_resize_nosize, "resize"}, | ||
227 | {Opt_errors, "errors=%s"}, | ||
228 | {Opt_ignore, "noquota"}, | ||
229 | {Opt_ignore, "quota"}, | ||
230 | {Opt_ignore, "usrquota"}, | ||
231 | {Opt_ignore, "grpquota"}, | ||
232 | {Opt_err, NULL} | ||
233 | }; | ||
234 | |||
235 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | ||
236 | int *flag) | ||
237 | { | ||
238 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | ||
239 | char *p; | ||
240 | struct jfs_sb_info *sbi = JFS_SBI(sb); | ||
241 | |||
242 | *newLVSize = 0; | ||
243 | |||
244 | if (!options) | ||
245 | return 1; | ||
246 | |||
247 | while ((p = strsep(&options, ",")) != NULL) { | ||
248 | substring_t args[MAX_OPT_ARGS]; | ||
249 | int token; | ||
250 | if (!*p) | ||
251 | continue; | ||
252 | |||
253 | token = match_token(p, tokens, args); | ||
254 | switch (token) { | ||
255 | case Opt_integrity: | ||
256 | *flag &= ~JFS_NOINTEGRITY; | ||
257 | break; | ||
258 | case Opt_nointegrity: | ||
259 | *flag |= JFS_NOINTEGRITY; | ||
260 | break; | ||
261 | case Opt_ignore: | ||
262 | /* Silently ignore the quota options */ | ||
263 | /* Don't do anything ;-) */ | ||
264 | break; | ||
265 | case Opt_iocharset: | ||
266 | if (nls_map && nls_map != (void *) -1) | ||
267 | unload_nls(nls_map); | ||
268 | if (!strcmp(args[0].from, "none")) | ||
269 | nls_map = NULL; | ||
270 | else { | ||
271 | nls_map = load_nls(args[0].from); | ||
272 | if (!nls_map) { | ||
273 | printk(KERN_ERR | ||
274 | "JFS: charset not found\n"); | ||
275 | goto cleanup; | ||
276 | } | ||
277 | } | ||
278 | break; | ||
279 | case Opt_resize: | ||
280 | { | ||
281 | char *resize = args[0].from; | ||
282 | *newLVSize = simple_strtoull(resize, &resize, 0); | ||
283 | break; | ||
284 | } | ||
285 | case Opt_resize_nosize: | ||
286 | { | ||
287 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | ||
288 | sb->s_blocksize_bits; | ||
289 | if (*newLVSize == 0) | ||
290 | printk(KERN_ERR | ||
291 | "JFS: Cannot determine volume size\n"); | ||
292 | break; | ||
293 | } | ||
294 | case Opt_errors: | ||
295 | { | ||
296 | char *errors = args[0].from; | ||
297 | if (!errors || !*errors) | ||
298 | goto cleanup; | ||
299 | if (!strcmp(errors, "continue")) { | ||
300 | *flag &= ~JFS_ERR_REMOUNT_RO; | ||
301 | *flag &= ~JFS_ERR_PANIC; | ||
302 | *flag |= JFS_ERR_CONTINUE; | ||
303 | } else if (!strcmp(errors, "remount-ro")) { | ||
304 | *flag &= ~JFS_ERR_CONTINUE; | ||
305 | *flag &= ~JFS_ERR_PANIC; | ||
306 | *flag |= JFS_ERR_REMOUNT_RO; | ||
307 | } else if (!strcmp(errors, "panic")) { | ||
308 | *flag &= ~JFS_ERR_CONTINUE; | ||
309 | *flag &= ~JFS_ERR_REMOUNT_RO; | ||
310 | *flag |= JFS_ERR_PANIC; | ||
311 | } else { | ||
312 | printk(KERN_ERR | ||
313 | "JFS: %s is an invalid error handler\n", | ||
314 | errors); | ||
315 | goto cleanup; | ||
316 | } | ||
317 | break; | ||
318 | } | ||
319 | default: | ||
320 | printk("jfs: Unrecognized mount option \"%s\" " | ||
321 | " or missing value\n", p); | ||
322 | goto cleanup; | ||
323 | } | ||
324 | } | ||
325 | |||
326 | if (nls_map != (void *) -1) { | ||
327 | /* Discard old (if remount) */ | ||
328 | if (sbi->nls_tab) | ||
329 | unload_nls(sbi->nls_tab); | ||
330 | sbi->nls_tab = nls_map; | ||
331 | } | ||
332 | return 1; | ||
333 | |||
334 | cleanup: | ||
335 | if (nls_map && nls_map != (void *) -1) | ||
336 | unload_nls(nls_map); | ||
337 | return 0; | ||
338 | } | ||
339 | |||
340 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | ||
341 | { | ||
342 | s64 newLVSize = 0; | ||
343 | int rc = 0; | ||
344 | int flag = JFS_SBI(sb)->flag; | ||
345 | |||
346 | if (!parse_options(data, sb, &newLVSize, &flag)) { | ||
347 | return -EINVAL; | ||
348 | } | ||
349 | if (newLVSize) { | ||
350 | if (sb->s_flags & MS_RDONLY) { | ||
351 | printk(KERN_ERR | ||
352 | "JFS: resize requires volume to be mounted read-write\n"); | ||
353 | return -EROFS; | ||
354 | } | ||
355 | rc = jfs_extendfs(sb, newLVSize, 0); | ||
356 | if (rc) | ||
357 | return rc; | ||
358 | } | ||
359 | |||
360 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | ||
361 | JFS_SBI(sb)->flag = flag; | ||
362 | return jfs_mount_rw(sb, 1); | ||
363 | } | ||
364 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | ||
365 | rc = jfs_umount_rw(sb); | ||
366 | JFS_SBI(sb)->flag = flag; | ||
367 | return rc; | ||
368 | } | ||
369 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | ||
370 | if (!(sb->s_flags & MS_RDONLY)) { | ||
371 | rc = jfs_umount_rw(sb); | ||
372 | if (rc) | ||
373 | return rc; | ||
374 | JFS_SBI(sb)->flag = flag; | ||
375 | return jfs_mount_rw(sb, 1); | ||
376 | } | ||
377 | JFS_SBI(sb)->flag = flag; | ||
378 | |||
379 | return 0; | ||
380 | } | ||
381 | |||
382 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | ||
383 | { | ||
384 | struct jfs_sb_info *sbi; | ||
385 | struct inode *inode; | ||
386 | int rc; | ||
387 | s64 newLVSize = 0; | ||
388 | int flag; | ||
389 | |||
390 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | ||
391 | |||
392 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | ||
393 | return -EOVERFLOW; | ||
394 | |||
395 | sbi = kmalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); | ||
396 | if (!sbi) | ||
397 | return -ENOSPC; | ||
398 | memset(sbi, 0, sizeof (struct jfs_sb_info)); | ||
399 | sb->s_fs_info = sbi; | ||
400 | sbi->sb = sb; | ||
401 | |||
402 | /* initialize the mount flag and determine the default error handler */ | ||
403 | flag = JFS_ERR_REMOUNT_RO; | ||
404 | |||
405 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { | ||
406 | kfree(sbi); | ||
407 | return -EINVAL; | ||
408 | } | ||
409 | sbi->flag = flag; | ||
410 | |||
411 | #ifdef CONFIG_JFS_POSIX_ACL | ||
412 | sb->s_flags |= MS_POSIXACL; | ||
413 | #endif | ||
414 | |||
415 | if (newLVSize) { | ||
416 | printk(KERN_ERR "resize option for remount only\n"); | ||
417 | return -EINVAL; | ||
418 | } | ||
419 | |||
420 | /* | ||
421 | * Initialize blocksize to 4K. | ||
422 | */ | ||
423 | sb_set_blocksize(sb, PSIZE); | ||
424 | |||
425 | /* | ||
426 | * Set method vectors. | ||
427 | */ | ||
428 | sb->s_op = &jfs_super_operations; | ||
429 | sb->s_export_op = &jfs_export_operations; | ||
430 | |||
431 | rc = jfs_mount(sb); | ||
432 | if (rc) { | ||
433 | if (!silent) { | ||
434 | jfs_err("jfs_mount failed w/return code = %d", rc); | ||
435 | } | ||
436 | goto out_kfree; | ||
437 | } | ||
438 | if (sb->s_flags & MS_RDONLY) | ||
439 | sbi->log = NULL; | ||
440 | else { | ||
441 | rc = jfs_mount_rw(sb, 0); | ||
442 | if (rc) { | ||
443 | if (!silent) { | ||
444 | jfs_err("jfs_mount_rw failed, return code = %d", | ||
445 | rc); | ||
446 | } | ||
447 | goto out_no_rw; | ||
448 | } | ||
449 | } | ||
450 | |||
451 | sb->s_magic = JFS_SUPER_MAGIC; | ||
452 | |||
453 | inode = iget(sb, ROOT_I); | ||
454 | if (!inode || is_bad_inode(inode)) | ||
455 | goto out_no_root; | ||
456 | sb->s_root = d_alloc_root(inode); | ||
457 | if (!sb->s_root) | ||
458 | goto out_no_root; | ||
459 | |||
460 | if (sbi->mntflag & JFS_OS2) | ||
461 | sb->s_root->d_op = &jfs_ci_dentry_operations; | ||
462 | |||
463 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | ||
464 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | ||
465 | #if BITS_PER_LONG == 32 | ||
466 | /* | ||
467 | * Page cache is indexed by long. | ||
468 | * I would use MAX_LFS_FILESIZE, but it's only half as big | ||
469 | */ | ||
470 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); | ||
471 | #endif | ||
472 | sb->s_time_gran = 1; | ||
473 | return 0; | ||
474 | |||
475 | out_no_root: | ||
476 | jfs_err("jfs_read_super: get root inode failed"); | ||
477 | if (inode) | ||
478 | iput(inode); | ||
479 | |||
480 | out_no_rw: | ||
481 | rc = jfs_umount(sb); | ||
482 | if (rc) { | ||
483 | jfs_err("jfs_umount failed with return code %d", rc); | ||
484 | } | ||
485 | out_kfree: | ||
486 | if (sbi->nls_tab) | ||
487 | unload_nls(sbi->nls_tab); | ||
488 | kfree(sbi); | ||
489 | return -EINVAL; | ||
490 | } | ||
491 | |||
492 | static void jfs_write_super_lockfs(struct super_block *sb) | ||
493 | { | ||
494 | struct jfs_sb_info *sbi = JFS_SBI(sb); | ||
495 | struct jfs_log *log = sbi->log; | ||
496 | |||
497 | if (!(sb->s_flags & MS_RDONLY)) { | ||
498 | txQuiesce(sb); | ||
499 | lmLogShutdown(log); | ||
500 | updateSuper(sb, FM_CLEAN); | ||
501 | } | ||
502 | } | ||
503 | |||
504 | static void jfs_unlockfs(struct super_block *sb) | ||
505 | { | ||
506 | struct jfs_sb_info *sbi = JFS_SBI(sb); | ||
507 | struct jfs_log *log = sbi->log; | ||
508 | int rc = 0; | ||
509 | |||
510 | if (!(sb->s_flags & MS_RDONLY)) { | ||
511 | updateSuper(sb, FM_MOUNT); | ||
512 | if ((rc = lmLogInit(log))) | ||
513 | jfs_err("jfs_unlock failed with return code %d", rc); | ||
514 | else | ||
515 | txResume(sb); | ||
516 | } | ||
517 | } | ||
518 | |||
519 | static struct super_block *jfs_get_sb(struct file_system_type *fs_type, | ||
520 | int flags, const char *dev_name, void *data) | ||
521 | { | ||
522 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super); | ||
523 | } | ||
524 | |||
525 | static int jfs_sync_fs(struct super_block *sb, int wait) | ||
526 | { | ||
527 | struct jfs_log *log = JFS_SBI(sb)->log; | ||
528 | |||
529 | /* log == NULL indicates read-only mount */ | ||
530 | if (log) | ||
531 | jfs_flush_journal(log, wait); | ||
532 | |||
533 | return 0; | ||
534 | } | ||
535 | |||
536 | static struct super_operations jfs_super_operations = { | ||
537 | .alloc_inode = jfs_alloc_inode, | ||
538 | .destroy_inode = jfs_destroy_inode, | ||
539 | .read_inode = jfs_read_inode, | ||
540 | .dirty_inode = jfs_dirty_inode, | ||
541 | .write_inode = jfs_write_inode, | ||
542 | .delete_inode = jfs_delete_inode, | ||
543 | .put_super = jfs_put_super, | ||
544 | .sync_fs = jfs_sync_fs, | ||
545 | .write_super_lockfs = jfs_write_super_lockfs, | ||
546 | .unlockfs = jfs_unlockfs, | ||
547 | .statfs = jfs_statfs, | ||
548 | .remount_fs = jfs_remount, | ||
549 | }; | ||
550 | |||
551 | static struct export_operations jfs_export_operations = { | ||
552 | .get_parent = jfs_get_parent, | ||
553 | }; | ||
554 | |||
555 | static struct file_system_type jfs_fs_type = { | ||
556 | .owner = THIS_MODULE, | ||
557 | .name = "jfs", | ||
558 | .get_sb = jfs_get_sb, | ||
559 | .kill_sb = kill_block_super, | ||
560 | .fs_flags = FS_REQUIRES_DEV, | ||
561 | }; | ||
562 | |||
563 | extern int metapage_init(void); | ||
564 | extern int txInit(void); | ||
565 | extern void txExit(void); | ||
566 | extern void metapage_exit(void); | ||
567 | |||
568 | static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags) | ||
569 | { | ||
570 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | ||
571 | |||
572 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == | ||
573 | SLAB_CTOR_CONSTRUCTOR) { | ||
574 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); | ||
575 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | ||
576 | init_rwsem(&jfs_ip->rdwrlock); | ||
577 | init_MUTEX(&jfs_ip->commit_sem); | ||
578 | init_rwsem(&jfs_ip->xattr_sem); | ||
579 | spin_lock_init(&jfs_ip->ag_lock); | ||
580 | jfs_ip->active_ag = -1; | ||
581 | #ifdef CONFIG_JFS_POSIX_ACL | ||
582 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; | ||
583 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; | ||
584 | #endif | ||
585 | inode_init_once(&jfs_ip->vfs_inode); | ||
586 | } | ||
587 | } | ||
588 | |||
589 | static int __init init_jfs_fs(void) | ||
590 | { | ||
591 | int i; | ||
592 | int rc; | ||
593 | |||
594 | jfs_inode_cachep = | ||
595 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, | ||
596 | SLAB_RECLAIM_ACCOUNT, init_once, NULL); | ||
597 | if (jfs_inode_cachep == NULL) | ||
598 | return -ENOMEM; | ||
599 | |||
600 | /* | ||
601 | * Metapage initialization | ||
602 | */ | ||
603 | rc = metapage_init(); | ||
604 | if (rc) { | ||
605 | jfs_err("metapage_init failed w/rc = %d", rc); | ||
606 | goto free_slab; | ||
607 | } | ||
608 | |||
609 | /* | ||
610 | * Transaction Manager initialization | ||
611 | */ | ||
612 | rc = txInit(); | ||
613 | if (rc) { | ||
614 | jfs_err("txInit failed w/rc = %d", rc); | ||
615 | goto free_metapage; | ||
616 | } | ||
617 | |||
618 | /* | ||
619 | * I/O completion thread (endio) | ||
620 | */ | ||
621 | jfsIOthread = kernel_thread(jfsIOWait, NULL, CLONE_KERNEL); | ||
622 | if (jfsIOthread < 0) { | ||
623 | jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsIOthread); | ||
624 | goto end_txmngr; | ||
625 | } | ||
626 | wait_for_completion(&jfsIOwait); /* Wait until thread starts */ | ||
627 | |||
628 | if (commit_threads < 1) | ||
629 | commit_threads = num_online_cpus(); | ||
630 | if (commit_threads > MAX_COMMIT_THREADS) | ||
631 | commit_threads = MAX_COMMIT_THREADS; | ||
632 | |||
633 | for (i = 0; i < commit_threads; i++) { | ||
634 | jfsCommitThread[i] = kernel_thread(jfs_lazycommit, NULL, | ||
635 | CLONE_KERNEL); | ||
636 | if (jfsCommitThread[i] < 0) { | ||
637 | jfs_err("init_jfs_fs: fork failed w/rc = %d", | ||
638 | jfsCommitThread[i]); | ||
639 | commit_threads = i; | ||
640 | goto kill_committask; | ||
641 | } | ||
642 | /* Wait until thread starts */ | ||
643 | wait_for_completion(&jfsIOwait); | ||
644 | } | ||
645 | |||
646 | jfsSyncThread = kernel_thread(jfs_sync, NULL, CLONE_KERNEL); | ||
647 | if (jfsSyncThread < 0) { | ||
648 | jfs_err("init_jfs_fs: fork failed w/rc = %d", jfsSyncThread); | ||
649 | goto kill_committask; | ||
650 | } | ||
651 | wait_for_completion(&jfsIOwait); /* Wait until thread starts */ | ||
652 | |||
653 | #ifdef PROC_FS_JFS | ||
654 | jfs_proc_init(); | ||
655 | #endif | ||
656 | |||
657 | return register_filesystem(&jfs_fs_type); | ||
658 | |||
659 | kill_committask: | ||
660 | jfs_stop_threads = 1; | ||
661 | wake_up_all(&jfs_commit_thread_wait); | ||
662 | for (i = 0; i < commit_threads; i++) | ||
663 | wait_for_completion(&jfsIOwait); | ||
664 | |||
665 | wake_up(&jfs_IO_thread_wait); | ||
666 | wait_for_completion(&jfsIOwait); /* Wait for thread exit */ | ||
667 | end_txmngr: | ||
668 | txExit(); | ||
669 | free_metapage: | ||
670 | metapage_exit(); | ||
671 | free_slab: | ||
672 | kmem_cache_destroy(jfs_inode_cachep); | ||
673 | return rc; | ||
674 | } | ||
675 | |||
676 | static void __exit exit_jfs_fs(void) | ||
677 | { | ||
678 | int i; | ||
679 | |||
680 | jfs_info("exit_jfs_fs called"); | ||
681 | |||
682 | jfs_stop_threads = 1; | ||
683 | txExit(); | ||
684 | metapage_exit(); | ||
685 | wake_up(&jfs_IO_thread_wait); | ||
686 | wait_for_completion(&jfsIOwait); /* Wait until IO thread exits */ | ||
687 | wake_up_all(&jfs_commit_thread_wait); | ||
688 | for (i = 0; i < commit_threads; i++) | ||
689 | wait_for_completion(&jfsIOwait); | ||
690 | wake_up(&jfs_sync_thread_wait); | ||
691 | wait_for_completion(&jfsIOwait); /* Wait until Sync thread exits */ | ||
692 | #ifdef PROC_FS_JFS | ||
693 | jfs_proc_clean(); | ||
694 | #endif | ||
695 | unregister_filesystem(&jfs_fs_type); | ||
696 | kmem_cache_destroy(jfs_inode_cachep); | ||
697 | } | ||
698 | |||
699 | module_init(init_jfs_fs) | ||
700 | module_exit(exit_jfs_fs) | ||