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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 | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
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 | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ | |
19 | ||
20 | #include <linux/fs.h> | |
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/parser.h> | |
23 | #include <linux/completion.h> | |
24 | #include <linux/vfs.h> | |
8fc2751b | 25 | #include <linux/mount.h> |
1da177e4 | 26 | #include <linux/moduleparam.h> |
91dbb4de | 27 | #include <linux/kthread.h> |
9a59f452 | 28 | #include <linux/posix_acl.h> |
115ff50b | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
1da177e4 | 31 | #include <asm/uaccess.h> |
8fc2751b | 32 | #include <linux/seq_file.h> |
1da177e4 LT |
33 | |
34 | #include "jfs_incore.h" | |
35 | #include "jfs_filsys.h" | |
1868f4aa | 36 | #include "jfs_inode.h" |
1da177e4 LT |
37 | #include "jfs_metapage.h" |
38 | #include "jfs_superblock.h" | |
39 | #include "jfs_dmap.h" | |
40 | #include "jfs_imap.h" | |
41 | #include "jfs_acl.h" | |
42 | #include "jfs_debug.h" | |
43 | ||
44 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
45 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
e18b890b | 48 | static struct kmem_cache * jfs_inode_cachep; |
1da177e4 | 49 | |
ee9b6d61 | 50 | static const struct super_operations jfs_super_operations; |
1da177e4 LT |
51 | static struct export_operations jfs_export_operations; |
52 | static struct file_system_type jfs_fs_type; | |
53 | ||
54 | #define MAX_COMMIT_THREADS 64 | |
55 | static int commit_threads = 0; | |
56 | module_param(commit_threads, int, 0); | |
57 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
58 | ||
91dbb4de CH |
59 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
60 | struct task_struct *jfsIOthread; | |
61 | struct task_struct *jfsSyncThread; | |
1da177e4 LT |
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; | |
63f83c9f | 86 | } |
1da177e4 LT |
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); | |
4a6e617a | 97 | vsnprintf(error_buf, sizeof(error_buf), function, args); |
1da177e4 LT |
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 | ||
726c3342 | 143 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 144 | { |
726c3342 | 145 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
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 | 197 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
69eb66d7 | 198 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
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"}, | |
69eb66d7 DK |
212 | {Opt_uid, "uid=%u"}, |
213 | {Opt_gid, "gid=%u"}, | |
214 | {Opt_umask, "umask=%u"}, | |
1da177e4 LT |
215 | {Opt_err, NULL} |
216 | }; | |
217 | ||
218 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
219 | int *flag) | |
220 | { | |
221 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
222 | char *p; | |
223 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
224 | ||
225 | *newLVSize = 0; | |
226 | ||
227 | if (!options) | |
228 | return 1; | |
229 | ||
230 | while ((p = strsep(&options, ",")) != NULL) { | |
231 | substring_t args[MAX_OPT_ARGS]; | |
232 | int token; | |
233 | if (!*p) | |
234 | continue; | |
235 | ||
236 | token = match_token(p, tokens, args); | |
237 | switch (token) { | |
238 | case Opt_integrity: | |
239 | *flag &= ~JFS_NOINTEGRITY; | |
240 | break; | |
241 | case Opt_nointegrity: | |
242 | *flag |= JFS_NOINTEGRITY; | |
243 | break; | |
244 | case Opt_ignore: | |
245 | /* Silently ignore the quota options */ | |
246 | /* Don't do anything ;-) */ | |
247 | break; | |
248 | case Opt_iocharset: | |
249 | if (nls_map && nls_map != (void *) -1) | |
250 | unload_nls(nls_map); | |
251 | if (!strcmp(args[0].from, "none")) | |
252 | nls_map = NULL; | |
253 | else { | |
254 | nls_map = load_nls(args[0].from); | |
255 | if (!nls_map) { | |
256 | printk(KERN_ERR | |
257 | "JFS: charset not found\n"); | |
258 | goto cleanup; | |
259 | } | |
260 | } | |
261 | break; | |
262 | case Opt_resize: | |
263 | { | |
264 | char *resize = args[0].from; | |
265 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
266 | break; | |
267 | } | |
268 | case Opt_resize_nosize: | |
269 | { | |
270 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
271 | sb->s_blocksize_bits; | |
272 | if (*newLVSize == 0) | |
273 | printk(KERN_ERR | |
274 | "JFS: Cannot determine volume size\n"); | |
275 | break; | |
276 | } | |
277 | case Opt_errors: | |
278 | { | |
279 | char *errors = args[0].from; | |
280 | if (!errors || !*errors) | |
281 | goto cleanup; | |
282 | if (!strcmp(errors, "continue")) { | |
283 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
284 | *flag &= ~JFS_ERR_PANIC; | |
285 | *flag |= JFS_ERR_CONTINUE; | |
286 | } else if (!strcmp(errors, "remount-ro")) { | |
287 | *flag &= ~JFS_ERR_CONTINUE; | |
288 | *flag &= ~JFS_ERR_PANIC; | |
289 | *flag |= JFS_ERR_REMOUNT_RO; | |
290 | } else if (!strcmp(errors, "panic")) { | |
291 | *flag &= ~JFS_ERR_CONTINUE; | |
292 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
293 | *flag |= JFS_ERR_PANIC; | |
294 | } else { | |
295 | printk(KERN_ERR | |
296 | "JFS: %s is an invalid error handler\n", | |
297 | errors); | |
298 | goto cleanup; | |
299 | } | |
300 | break; | |
301 | } | |
8fc2751b | 302 | |
115ff50b | 303 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
304 | case Opt_quota: |
305 | case Opt_usrquota: | |
306 | *flag |= JFS_USRQUOTA; | |
307 | break; | |
308 | case Opt_grpquota: | |
309 | *flag |= JFS_GRPQUOTA; | |
310 | break; | |
311 | #else | |
312 | case Opt_usrquota: | |
313 | case Opt_grpquota: | |
314 | case Opt_quota: | |
315 | printk(KERN_ERR | |
316 | "JFS: quota operations not supported\n"); | |
317 | break; | |
318 | #endif | |
69eb66d7 DK |
319 | case Opt_uid: |
320 | { | |
321 | char *uid = args[0].from; | |
322 | sbi->uid = simple_strtoul(uid, &uid, 0); | |
323 | break; | |
324 | } | |
325 | case Opt_gid: | |
326 | { | |
327 | char *gid = args[0].from; | |
328 | sbi->gid = simple_strtoul(gid, &gid, 0); | |
329 | break; | |
330 | } | |
331 | case Opt_umask: | |
332 | { | |
333 | char *umask = args[0].from; | |
334 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
335 | if (sbi->umask & ~0777) { | |
336 | printk(KERN_ERR | |
337 | "JFS: Invalid value of umask\n"); | |
338 | goto cleanup; | |
339 | } | |
340 | break; | |
341 | } | |
1da177e4 LT |
342 | default: |
343 | printk("jfs: Unrecognized mount option \"%s\" " | |
344 | " or missing value\n", p); | |
345 | goto cleanup; | |
346 | } | |
347 | } | |
348 | ||
349 | if (nls_map != (void *) -1) { | |
350 | /* Discard old (if remount) */ | |
351 | if (sbi->nls_tab) | |
352 | unload_nls(sbi->nls_tab); | |
353 | sbi->nls_tab = nls_map; | |
354 | } | |
355 | return 1; | |
356 | ||
357 | cleanup: | |
358 | if (nls_map && nls_map != (void *) -1) | |
359 | unload_nls(nls_map); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
364 | { | |
365 | s64 newLVSize = 0; | |
366 | int rc = 0; | |
367 | int flag = JFS_SBI(sb)->flag; | |
368 | ||
369 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
370 | return -EINVAL; | |
371 | } | |
372 | if (newLVSize) { | |
373 | if (sb->s_flags & MS_RDONLY) { | |
374 | printk(KERN_ERR | |
375 | "JFS: resize requires volume to be mounted read-write\n"); | |
376 | return -EROFS; | |
377 | } | |
378 | rc = jfs_extendfs(sb, newLVSize, 0); | |
379 | if (rc) | |
380 | return rc; | |
381 | } | |
382 | ||
383 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
384 | /* |
385 | * Invalidate any previously read metadata. fsck may have | |
386 | * changed the on-disk data since we mounted r/o | |
387 | */ | |
388 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
389 | ||
1da177e4 LT |
390 | JFS_SBI(sb)->flag = flag; |
391 | return jfs_mount_rw(sb, 1); | |
392 | } | |
393 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
394 | rc = jfs_umount_rw(sb); | |
395 | JFS_SBI(sb)->flag = flag; | |
396 | return rc; | |
397 | } | |
398 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
399 | if (!(sb->s_flags & MS_RDONLY)) { | |
400 | rc = jfs_umount_rw(sb); | |
401 | if (rc) | |
402 | return rc; | |
403 | JFS_SBI(sb)->flag = flag; | |
404 | return jfs_mount_rw(sb, 1); | |
405 | } | |
406 | JFS_SBI(sb)->flag = flag; | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
411 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
412 | { | |
413 | struct jfs_sb_info *sbi; | |
414 | struct inode *inode; | |
415 | int rc; | |
416 | s64 newLVSize = 0; | |
417 | int flag; | |
418 | ||
419 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
420 | ||
421 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | |
422 | return -EOVERFLOW; | |
423 | ||
5b3030e3 | 424 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
1da177e4 | 425 | if (!sbi) |
087387f9 | 426 | return -ENOMEM; |
1da177e4 LT |
427 | sb->s_fs_info = sbi; |
428 | sbi->sb = sb; | |
69eb66d7 | 429 | sbi->uid = sbi->gid = sbi->umask = -1; |
1da177e4 LT |
430 | |
431 | /* initialize the mount flag and determine the default error handler */ | |
432 | flag = JFS_ERR_REMOUNT_RO; | |
433 | ||
434 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { | |
435 | kfree(sbi); | |
436 | return -EINVAL; | |
437 | } | |
438 | sbi->flag = flag; | |
439 | ||
440 | #ifdef CONFIG_JFS_POSIX_ACL | |
441 | sb->s_flags |= MS_POSIXACL; | |
442 | #endif | |
443 | ||
444 | if (newLVSize) { | |
445 | printk(KERN_ERR "resize option for remount only\n"); | |
446 | return -EINVAL; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Initialize blocksize to 4K. | |
451 | */ | |
452 | sb_set_blocksize(sb, PSIZE); | |
453 | ||
454 | /* | |
455 | * Set method vectors. | |
456 | */ | |
457 | sb->s_op = &jfs_super_operations; | |
458 | sb->s_export_op = &jfs_export_operations; | |
459 | ||
7fab479b DK |
460 | /* |
461 | * Initialize direct-mapping inode/address-space | |
462 | */ | |
463 | inode = new_inode(sb); | |
464 | if (inode == NULL) | |
465 | goto out_kfree; | |
466 | inode->i_ino = 0; | |
467 | inode->i_nlink = 1; | |
468 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
469 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 470 | insert_inode_hash(inode); |
7fab479b DK |
471 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
472 | ||
473 | sbi->direct_inode = inode; | |
474 | ||
1da177e4 LT |
475 | rc = jfs_mount(sb); |
476 | if (rc) { | |
477 | if (!silent) { | |
478 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
479 | } | |
7fab479b | 480 | goto out_mount_failed; |
1da177e4 LT |
481 | } |
482 | if (sb->s_flags & MS_RDONLY) | |
483 | sbi->log = NULL; | |
484 | else { | |
485 | rc = jfs_mount_rw(sb, 0); | |
486 | if (rc) { | |
487 | if (!silent) { | |
488 | jfs_err("jfs_mount_rw failed, return code = %d", | |
489 | rc); | |
490 | } | |
491 | goto out_no_rw; | |
492 | } | |
493 | } | |
494 | ||
495 | sb->s_magic = JFS_SUPER_MAGIC; | |
496 | ||
497 | inode = iget(sb, ROOT_I); | |
498 | if (!inode || is_bad_inode(inode)) | |
499 | goto out_no_root; | |
500 | sb->s_root = d_alloc_root(inode); | |
501 | if (!sb->s_root) | |
502 | goto out_no_root; | |
503 | ||
504 | if (sbi->mntflag & JFS_OS2) | |
505 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
506 | ||
507 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
508 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
509 | #if BITS_PER_LONG == 32 | |
510 | /* | |
511 | * Page cache is indexed by long. | |
512 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
513 | */ | |
514 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); | |
515 | #endif | |
516 | sb->s_time_gran = 1; | |
517 | return 0; | |
518 | ||
519 | out_no_root: | |
520 | jfs_err("jfs_read_super: get root inode failed"); | |
521 | if (inode) | |
522 | iput(inode); | |
523 | ||
524 | out_no_rw: | |
525 | rc = jfs_umount(sb); | |
526 | if (rc) { | |
527 | jfs_err("jfs_umount failed with return code %d", rc); | |
528 | } | |
7fab479b | 529 | out_mount_failed: |
28fd1298 | 530 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
531 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
532 | make_bad_inode(sbi->direct_inode); | |
533 | iput(sbi->direct_inode); | |
534 | sbi->direct_inode = NULL; | |
1da177e4 LT |
535 | out_kfree: |
536 | if (sbi->nls_tab) | |
537 | unload_nls(sbi->nls_tab); | |
538 | kfree(sbi); | |
539 | return -EINVAL; | |
540 | } | |
541 | ||
542 | static void jfs_write_super_lockfs(struct super_block *sb) | |
543 | { | |
544 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
545 | struct jfs_log *log = sbi->log; | |
546 | ||
547 | if (!(sb->s_flags & MS_RDONLY)) { | |
548 | txQuiesce(sb); | |
549 | lmLogShutdown(log); | |
550 | updateSuper(sb, FM_CLEAN); | |
551 | } | |
552 | } | |
553 | ||
554 | static void jfs_unlockfs(struct super_block *sb) | |
555 | { | |
556 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
557 | struct jfs_log *log = sbi->log; | |
558 | int rc = 0; | |
559 | ||
560 | if (!(sb->s_flags & MS_RDONLY)) { | |
561 | updateSuper(sb, FM_MOUNT); | |
562 | if ((rc = lmLogInit(log))) | |
563 | jfs_err("jfs_unlock failed with return code %d", rc); | |
564 | else | |
565 | txResume(sb); | |
566 | } | |
567 | } | |
568 | ||
454e2398 DH |
569 | static int jfs_get_sb(struct file_system_type *fs_type, |
570 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 571 | { |
454e2398 DH |
572 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, |
573 | mnt); | |
1da177e4 LT |
574 | } |
575 | ||
576 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
577 | { | |
578 | struct jfs_log *log = JFS_SBI(sb)->log; | |
579 | ||
580 | /* log == NULL indicates read-only mount */ | |
1c627829 | 581 | if (log) { |
1da177e4 | 582 | jfs_flush_journal(log, wait); |
cbc3d65e | 583 | jfs_syncpt(log, 0); |
1c627829 | 584 | } |
1da177e4 LT |
585 | |
586 | return 0; | |
587 | } | |
588 | ||
8fc2751b MB |
589 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
590 | { | |
591 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
592 | ||
69eb66d7 DK |
593 | if (sbi->uid != -1) |
594 | seq_printf(seq, ",uid=%d", sbi->uid); | |
595 | if (sbi->gid != -1) | |
596 | seq_printf(seq, ",gid=%d", sbi->gid); | |
597 | if (sbi->umask != -1) | |
598 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
599 | if (sbi->flag & JFS_NOINTEGRITY) |
600 | seq_puts(seq, ",nointegrity"); | |
8fc2751b | 601 | |
115ff50b | 602 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
603 | if (sbi->flag & JFS_USRQUOTA) |
604 | seq_puts(seq, ",usrquota"); | |
605 | ||
606 | if (sbi->flag & JFS_GRPQUOTA) | |
607 | seq_puts(seq, ",grpquota"); | |
608 | #endif | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
115ff50b DK |
613 | #ifdef CONFIG_QUOTA |
614 | ||
615 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
616 | * acquiring the locks... As quota files are never truncated and quota code | |
617 | * itself serializes the operations (and noone else should touch the files) | |
618 | * we don't have to be afraid of races */ | |
619 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
620 | size_t len, loff_t off) | |
621 | { | |
622 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
623 | sector_t blk = off >> sb->s_blocksize_bits; | |
624 | int err = 0; | |
625 | int offset = off & (sb->s_blocksize - 1); | |
626 | int tocopy; | |
627 | size_t toread; | |
628 | struct buffer_head tmp_bh; | |
629 | struct buffer_head *bh; | |
630 | loff_t i_size = i_size_read(inode); | |
631 | ||
632 | if (off > i_size) | |
633 | return 0; | |
634 | if (off+len > i_size) | |
635 | len = i_size-off; | |
636 | toread = len; | |
637 | while (toread > 0) { | |
638 | tocopy = sb->s_blocksize - offset < toread ? | |
639 | sb->s_blocksize - offset : toread; | |
640 | ||
641 | tmp_bh.b_state = 0; | |
642 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
643 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
644 | if (err) | |
645 | return err; | |
646 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
647 | memset(data, 0, tocopy); | |
648 | else { | |
649 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
650 | if (!bh) | |
651 | return -EIO; | |
652 | memcpy(data, bh->b_data+offset, tocopy); | |
653 | brelse(bh); | |
654 | } | |
655 | offset = 0; | |
656 | toread -= tocopy; | |
657 | data += tocopy; | |
658 | blk++; | |
659 | } | |
660 | return len; | |
661 | } | |
662 | ||
663 | /* Write to quotafile */ | |
664 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
665 | const char *data, size_t len, loff_t off) | |
666 | { | |
667 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
668 | sector_t blk = off >> sb->s_blocksize_bits; | |
669 | int err = 0; | |
670 | int offset = off & (sb->s_blocksize - 1); | |
671 | int tocopy; | |
672 | size_t towrite = len; | |
673 | struct buffer_head tmp_bh; | |
674 | struct buffer_head *bh; | |
675 | ||
676 | mutex_lock(&inode->i_mutex); | |
677 | while (towrite > 0) { | |
678 | tocopy = sb->s_blocksize - offset < towrite ? | |
679 | sb->s_blocksize - offset : towrite; | |
680 | ||
681 | tmp_bh.b_state = 0; | |
8bcb2839 | 682 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
683 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
684 | if (err) | |
685 | goto out; | |
686 | if (offset || tocopy != sb->s_blocksize) | |
687 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
688 | else | |
689 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
690 | if (!bh) { | |
691 | err = -EIO; | |
692 | goto out; | |
693 | } | |
694 | lock_buffer(bh); | |
695 | memcpy(bh->b_data+offset, data, tocopy); | |
696 | flush_dcache_page(bh->b_page); | |
697 | set_buffer_uptodate(bh); | |
698 | mark_buffer_dirty(bh); | |
699 | unlock_buffer(bh); | |
700 | brelse(bh); | |
701 | offset = 0; | |
702 | towrite -= tocopy; | |
703 | data += tocopy; | |
704 | blk++; | |
705 | } | |
706 | out: | |
707 | if (len == towrite) | |
708 | return err; | |
709 | if (inode->i_size < off+len-towrite) | |
710 | i_size_write(inode, off+len-towrite); | |
711 | inode->i_version++; | |
712 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
713 | mark_inode_dirty(inode); | |
714 | mutex_unlock(&inode->i_mutex); | |
715 | return len - towrite; | |
716 | } | |
717 | ||
718 | #endif | |
719 | ||
ee9b6d61 | 720 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
721 | .alloc_inode = jfs_alloc_inode, |
722 | .destroy_inode = jfs_destroy_inode, | |
723 | .read_inode = jfs_read_inode, | |
724 | .dirty_inode = jfs_dirty_inode, | |
725 | .write_inode = jfs_write_inode, | |
726 | .delete_inode = jfs_delete_inode, | |
727 | .put_super = jfs_put_super, | |
728 | .sync_fs = jfs_sync_fs, | |
729 | .write_super_lockfs = jfs_write_super_lockfs, | |
730 | .unlockfs = jfs_unlockfs, | |
731 | .statfs = jfs_statfs, | |
732 | .remount_fs = jfs_remount, | |
115ff50b DK |
733 | .show_options = jfs_show_options, |
734 | #ifdef CONFIG_QUOTA | |
735 | .quota_read = jfs_quota_read, | |
736 | .quota_write = jfs_quota_write, | |
737 | #endif | |
1da177e4 LT |
738 | }; |
739 | ||
740 | static struct export_operations jfs_export_operations = { | |
d425de70 CH |
741 | .fh_to_dentry = jfs_fh_to_dentry, |
742 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
743 | .get_parent = jfs_get_parent, |
744 | }; | |
745 | ||
746 | static struct file_system_type jfs_fs_type = { | |
747 | .owner = THIS_MODULE, | |
748 | .name = "jfs", | |
749 | .get_sb = jfs_get_sb, | |
750 | .kill_sb = kill_block_super, | |
751 | .fs_flags = FS_REQUIRES_DEV, | |
752 | }; | |
753 | ||
4ba9b9d0 | 754 | static void init_once(struct kmem_cache *cachep, void *foo) |
1da177e4 LT |
755 | { |
756 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
757 | ||
a35afb83 CL |
758 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
759 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
760 | init_rwsem(&jfs_ip->rdwrlock); | |
761 | mutex_init(&jfs_ip->commit_mutex); | |
762 | init_rwsem(&jfs_ip->xattr_sem); | |
763 | spin_lock_init(&jfs_ip->ag_lock); | |
764 | jfs_ip->active_ag = -1; | |
1da177e4 | 765 | #ifdef CONFIG_JFS_POSIX_ACL |
a35afb83 CL |
766 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; |
767 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; | |
1da177e4 | 768 | #endif |
a35afb83 | 769 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
770 | } |
771 | ||
772 | static int __init init_jfs_fs(void) | |
773 | { | |
774 | int i; | |
775 | int rc; | |
776 | ||
777 | jfs_inode_cachep = | |
63f83c9f | 778 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 779 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 780 | init_once); |
1da177e4 LT |
781 | if (jfs_inode_cachep == NULL) |
782 | return -ENOMEM; | |
783 | ||
784 | /* | |
785 | * Metapage initialization | |
786 | */ | |
787 | rc = metapage_init(); | |
788 | if (rc) { | |
789 | jfs_err("metapage_init failed w/rc = %d", rc); | |
790 | goto free_slab; | |
791 | } | |
792 | ||
793 | /* | |
794 | * Transaction Manager initialization | |
795 | */ | |
796 | rc = txInit(); | |
797 | if (rc) { | |
798 | jfs_err("txInit failed w/rc = %d", rc); | |
799 | goto free_metapage; | |
800 | } | |
801 | ||
802 | /* | |
803 | * I/O completion thread (endio) | |
804 | */ | |
91dbb4de CH |
805 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
806 | if (IS_ERR(jfsIOthread)) { | |
807 | rc = PTR_ERR(jfsIOthread); | |
808 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
809 | goto end_txmngr; |
810 | } | |
1da177e4 LT |
811 | |
812 | if (commit_threads < 1) | |
813 | commit_threads = num_online_cpus(); | |
814 | if (commit_threads > MAX_COMMIT_THREADS) | |
815 | commit_threads = MAX_COMMIT_THREADS; | |
816 | ||
817 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
818 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
819 | if (IS_ERR(jfsCommitThread[i])) { | |
820 | rc = PTR_ERR(jfsCommitThread[i]); | |
821 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
822 | commit_threads = i; |
823 | goto kill_committask; | |
824 | } | |
1da177e4 LT |
825 | } |
826 | ||
91dbb4de CH |
827 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
828 | if (IS_ERR(jfsSyncThread)) { | |
829 | rc = PTR_ERR(jfsSyncThread); | |
830 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
831 | goto kill_committask; |
832 | } | |
1da177e4 LT |
833 | |
834 | #ifdef PROC_FS_JFS | |
835 | jfs_proc_init(); | |
836 | #endif | |
837 | ||
838 | return register_filesystem(&jfs_fs_type); | |
839 | ||
840 | kill_committask: | |
1da177e4 | 841 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
842 | kthread_stop(jfsCommitThread[i]); |
843 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
844 | end_txmngr: |
845 | txExit(); | |
846 | free_metapage: | |
847 | metapage_exit(); | |
848 | free_slab: | |
849 | kmem_cache_destroy(jfs_inode_cachep); | |
850 | return rc; | |
851 | } | |
852 | ||
853 | static void __exit exit_jfs_fs(void) | |
854 | { | |
855 | int i; | |
856 | ||
857 | jfs_info("exit_jfs_fs called"); | |
858 | ||
1da177e4 LT |
859 | txExit(); |
860 | metapage_exit(); | |
91dbb4de CH |
861 | |
862 | kthread_stop(jfsIOthread); | |
1da177e4 | 863 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
864 | kthread_stop(jfsCommitThread[i]); |
865 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
866 | #ifdef PROC_FS_JFS |
867 | jfs_proc_clean(); | |
868 | #endif | |
869 | unregister_filesystem(&jfs_fs_type); | |
870 | kmem_cache_destroy(jfs_inode_cachep); | |
871 | } | |
872 | ||
873 | module_init(init_jfs_fs) | |
874 | module_exit(exit_jfs_fs) |