Commit | Line | Data |
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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> | |
74abb989 | 25 | #include <linux/quotaops.h> |
8fc2751b | 26 | #include <linux/mount.h> |
1da177e4 | 27 | #include <linux/moduleparam.h> |
91dbb4de | 28 | #include <linux/kthread.h> |
9a59f452 | 29 | #include <linux/posix_acl.h> |
115ff50b | 30 | #include <linux/buffer_head.h> |
a5694255 | 31 | #include <linux/exportfs.h> |
1da177e4 | 32 | #include <asm/uaccess.h> |
8fc2751b | 33 | #include <linux/seq_file.h> |
1da177e4 LT |
34 | |
35 | #include "jfs_incore.h" | |
36 | #include "jfs_filsys.h" | |
1868f4aa | 37 | #include "jfs_inode.h" |
1da177e4 LT |
38 | #include "jfs_metapage.h" |
39 | #include "jfs_superblock.h" | |
40 | #include "jfs_dmap.h" | |
41 | #include "jfs_imap.h" | |
42 | #include "jfs_acl.h" | |
43 | #include "jfs_debug.h" | |
44 | ||
45 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
46 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
e18b890b | 49 | static struct kmem_cache * jfs_inode_cachep; |
1da177e4 | 50 | |
ee9b6d61 | 51 | static const struct super_operations jfs_super_operations; |
39655164 | 52 | static const struct export_operations jfs_export_operations; |
1da177e4 LT |
53 | static struct file_system_type jfs_fs_type; |
54 | ||
55 | #define MAX_COMMIT_THREADS 64 | |
56 | static int commit_threads = 0; | |
57 | module_param(commit_threads, int, 0); | |
58 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
59 | ||
91dbb4de CH |
60 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
61 | struct task_struct *jfsIOthread; | |
62 | struct task_struct *jfsSyncThread; | |
1da177e4 LT |
63 | |
64 | #ifdef CONFIG_JFS_DEBUG | |
65 | int jfsloglevel = JFS_LOGLEVEL_WARN; | |
66 | module_param(jfsloglevel, int, 0644); | |
67 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); | |
68 | #endif | |
69 | ||
1da177e4 LT |
70 | static void jfs_handle_error(struct super_block *sb) |
71 | { | |
72 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
73 | ||
74 | if (sb->s_flags & MS_RDONLY) | |
75 | return; | |
76 | ||
77 | updateSuper(sb, FM_DIRTY); | |
78 | ||
79 | if (sbi->flag & JFS_ERR_PANIC) | |
80 | panic("JFS (device %s): panic forced after error\n", | |
81 | sb->s_id); | |
82 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { | |
83 | jfs_err("ERROR: (device %s): remounting filesystem " | |
84 | "as read-only\n", | |
85 | sb->s_id); | |
86 | sb->s_flags |= MS_RDONLY; | |
63f83c9f | 87 | } |
1da177e4 LT |
88 | |
89 | /* nothing is done for continue beyond marking the superblock dirty */ | |
90 | } | |
91 | ||
92 | void jfs_error(struct super_block *sb, const char * function, ...) | |
93 | { | |
94 | static char error_buf[256]; | |
95 | va_list args; | |
96 | ||
97 | va_start(args, function); | |
4a6e617a | 98 | vsnprintf(error_buf, sizeof(error_buf), function, args); |
1da177e4 LT |
99 | va_end(args); |
100 | ||
101 | printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); | |
102 | ||
103 | jfs_handle_error(sb); | |
104 | } | |
105 | ||
106 | static struct inode *jfs_alloc_inode(struct super_block *sb) | |
107 | { | |
108 | struct jfs_inode_info *jfs_inode; | |
109 | ||
110 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); | |
111 | if (!jfs_inode) | |
112 | return NULL; | |
113 | return &jfs_inode->vfs_inode; | |
114 | } | |
115 | ||
116 | static void jfs_destroy_inode(struct inode *inode) | |
117 | { | |
118 | struct jfs_inode_info *ji = JFS_IP(inode); | |
119 | ||
8a9cd6d6 DK |
120 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
121 | ||
1da177e4 LT |
122 | spin_lock_irq(&ji->ag_lock); |
123 | if (ji->active_ag != -1) { | |
124 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
125 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
126 | ji->active_ag = -1; | |
127 | } | |
128 | spin_unlock_irq(&ji->ag_lock); | |
129 | ||
130 | #ifdef CONFIG_JFS_POSIX_ACL | |
131 | if (ji->i_acl != JFS_ACL_NOT_CACHED) { | |
132 | posix_acl_release(ji->i_acl); | |
133 | ji->i_acl = JFS_ACL_NOT_CACHED; | |
134 | } | |
135 | if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { | |
136 | posix_acl_release(ji->i_default_acl); | |
137 | ji->i_default_acl = JFS_ACL_NOT_CACHED; | |
138 | } | |
139 | #endif | |
140 | ||
141 | kmem_cache_free(jfs_inode_cachep, ji); | |
142 | } | |
143 | ||
726c3342 | 144 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 145 | { |
726c3342 | 146 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
147 | s64 maxinodes; |
148 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
149 | ||
150 | jfs_info("In jfs_statfs"); | |
151 | buf->f_type = JFS_SUPER_MAGIC; | |
152 | buf->f_bsize = sbi->bsize; | |
153 | buf->f_blocks = sbi->bmap->db_mapsize; | |
154 | buf->f_bfree = sbi->bmap->db_nfree; | |
155 | buf->f_bavail = sbi->bmap->db_nfree; | |
156 | /* | |
157 | * If we really return the number of allocated & free inodes, some | |
158 | * applications will fail because they won't see enough free inodes. | |
159 | * We'll try to calculate some guess as to how may inodes we can | |
160 | * really allocate | |
161 | * | |
162 | * buf->f_files = atomic_read(&imap->im_numinos); | |
163 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
164 | */ | |
165 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
166 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
167 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
168 | buf->f_files = maxinodes; | |
169 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
170 | atomic_read(&imap->im_numfree)); | |
171 | ||
172 | buf->f_namelen = JFS_NAME_MAX; | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static void jfs_put_super(struct super_block *sb) | |
177 | { | |
178 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
179 | int rc; | |
180 | ||
181 | jfs_info("In jfs_put_super"); | |
182 | rc = jfs_umount(sb); | |
183 | if (rc) | |
184 | jfs_err("jfs_umount failed with return code %d", rc); | |
185 | if (sbi->nls_tab) | |
186 | unload_nls(sbi->nls_tab); | |
187 | sbi->nls_tab = NULL; | |
188 | ||
7fab479b DK |
189 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
190 | iput(sbi->direct_inode); | |
191 | sbi->direct_inode = NULL; | |
192 | ||
1da177e4 LT |
193 | kfree(sbi); |
194 | } | |
195 | ||
196 | enum { | |
197 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 198 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
69eb66d7 | 199 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
1da177e4 LT |
200 | }; |
201 | ||
202 | static match_table_t tokens = { | |
203 | {Opt_integrity, "integrity"}, | |
204 | {Opt_nointegrity, "nointegrity"}, | |
205 | {Opt_iocharset, "iocharset=%s"}, | |
206 | {Opt_resize, "resize=%u"}, | |
207 | {Opt_resize_nosize, "resize"}, | |
208 | {Opt_errors, "errors=%s"}, | |
209 | {Opt_ignore, "noquota"}, | |
210 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
211 | {Opt_usrquota, "usrquota"}, |
212 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
213 | {Opt_uid, "uid=%u"}, |
214 | {Opt_gid, "gid=%u"}, | |
215 | {Opt_umask, "umask=%u"}, | |
1da177e4 LT |
216 | {Opt_err, NULL} |
217 | }; | |
218 | ||
219 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
220 | int *flag) | |
221 | { | |
222 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
223 | char *p; | |
224 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
225 | ||
226 | *newLVSize = 0; | |
227 | ||
228 | if (!options) | |
229 | return 1; | |
230 | ||
231 | while ((p = strsep(&options, ",")) != NULL) { | |
232 | substring_t args[MAX_OPT_ARGS]; | |
233 | int token; | |
234 | if (!*p) | |
235 | continue; | |
236 | ||
237 | token = match_token(p, tokens, args); | |
238 | switch (token) { | |
239 | case Opt_integrity: | |
240 | *flag &= ~JFS_NOINTEGRITY; | |
241 | break; | |
242 | case Opt_nointegrity: | |
243 | *flag |= JFS_NOINTEGRITY; | |
244 | break; | |
245 | case Opt_ignore: | |
246 | /* Silently ignore the quota options */ | |
247 | /* Don't do anything ;-) */ | |
248 | break; | |
249 | case Opt_iocharset: | |
250 | if (nls_map && nls_map != (void *) -1) | |
251 | unload_nls(nls_map); | |
252 | if (!strcmp(args[0].from, "none")) | |
253 | nls_map = NULL; | |
254 | else { | |
255 | nls_map = load_nls(args[0].from); | |
256 | if (!nls_map) { | |
257 | printk(KERN_ERR | |
258 | "JFS: charset not found\n"); | |
259 | goto cleanup; | |
260 | } | |
261 | } | |
262 | break; | |
263 | case Opt_resize: | |
264 | { | |
265 | char *resize = args[0].from; | |
266 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
267 | break; | |
268 | } | |
269 | case Opt_resize_nosize: | |
270 | { | |
271 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
272 | sb->s_blocksize_bits; | |
273 | if (*newLVSize == 0) | |
274 | printk(KERN_ERR | |
275 | "JFS: Cannot determine volume size\n"); | |
276 | break; | |
277 | } | |
278 | case Opt_errors: | |
279 | { | |
280 | char *errors = args[0].from; | |
281 | if (!errors || !*errors) | |
282 | goto cleanup; | |
283 | if (!strcmp(errors, "continue")) { | |
284 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
285 | *flag &= ~JFS_ERR_PANIC; | |
286 | *flag |= JFS_ERR_CONTINUE; | |
287 | } else if (!strcmp(errors, "remount-ro")) { | |
288 | *flag &= ~JFS_ERR_CONTINUE; | |
289 | *flag &= ~JFS_ERR_PANIC; | |
290 | *flag |= JFS_ERR_REMOUNT_RO; | |
291 | } else if (!strcmp(errors, "panic")) { | |
292 | *flag &= ~JFS_ERR_CONTINUE; | |
293 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
294 | *flag |= JFS_ERR_PANIC; | |
295 | } else { | |
296 | printk(KERN_ERR | |
297 | "JFS: %s is an invalid error handler\n", | |
298 | errors); | |
299 | goto cleanup; | |
300 | } | |
301 | break; | |
302 | } | |
8fc2751b | 303 | |
115ff50b | 304 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
305 | case Opt_quota: |
306 | case Opt_usrquota: | |
307 | *flag |= JFS_USRQUOTA; | |
308 | break; | |
309 | case Opt_grpquota: | |
310 | *flag |= JFS_GRPQUOTA; | |
311 | break; | |
312 | #else | |
313 | case Opt_usrquota: | |
314 | case Opt_grpquota: | |
315 | case Opt_quota: | |
316 | printk(KERN_ERR | |
317 | "JFS: quota operations not supported\n"); | |
318 | break; | |
319 | #endif | |
69eb66d7 DK |
320 | case Opt_uid: |
321 | { | |
322 | char *uid = args[0].from; | |
323 | sbi->uid = simple_strtoul(uid, &uid, 0); | |
324 | break; | |
325 | } | |
326 | case Opt_gid: | |
327 | { | |
328 | char *gid = args[0].from; | |
329 | sbi->gid = simple_strtoul(gid, &gid, 0); | |
330 | break; | |
331 | } | |
332 | case Opt_umask: | |
333 | { | |
334 | char *umask = args[0].from; | |
335 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
336 | if (sbi->umask & ~0777) { | |
337 | printk(KERN_ERR | |
338 | "JFS: Invalid value of umask\n"); | |
339 | goto cleanup; | |
340 | } | |
341 | break; | |
342 | } | |
1da177e4 LT |
343 | default: |
344 | printk("jfs: Unrecognized mount option \"%s\" " | |
345 | " or missing value\n", p); | |
346 | goto cleanup; | |
347 | } | |
348 | } | |
349 | ||
350 | if (nls_map != (void *) -1) { | |
351 | /* Discard old (if remount) */ | |
352 | if (sbi->nls_tab) | |
353 | unload_nls(sbi->nls_tab); | |
354 | sbi->nls_tab = nls_map; | |
355 | } | |
356 | return 1; | |
357 | ||
358 | cleanup: | |
359 | if (nls_map && nls_map != (void *) -1) | |
360 | unload_nls(nls_map); | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
365 | { | |
366 | s64 newLVSize = 0; | |
367 | int rc = 0; | |
368 | int flag = JFS_SBI(sb)->flag; | |
369 | ||
370 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
371 | return -EINVAL; | |
372 | } | |
373 | if (newLVSize) { | |
374 | if (sb->s_flags & MS_RDONLY) { | |
375 | printk(KERN_ERR | |
376 | "JFS: resize requires volume to be mounted read-write\n"); | |
377 | return -EROFS; | |
378 | } | |
379 | rc = jfs_extendfs(sb, newLVSize, 0); | |
380 | if (rc) | |
381 | return rc; | |
382 | } | |
383 | ||
384 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
385 | /* |
386 | * Invalidate any previously read metadata. fsck may have | |
387 | * changed the on-disk data since we mounted r/o | |
388 | */ | |
389 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
390 | ||
1da177e4 LT |
391 | JFS_SBI(sb)->flag = flag; |
392 | return jfs_mount_rw(sb, 1); | |
393 | } | |
394 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
395 | rc = jfs_umount_rw(sb); | |
396 | JFS_SBI(sb)->flag = flag; | |
397 | return rc; | |
398 | } | |
399 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
400 | if (!(sb->s_flags & MS_RDONLY)) { | |
401 | rc = jfs_umount_rw(sb); | |
402 | if (rc) | |
403 | return rc; | |
404 | JFS_SBI(sb)->flag = flag; | |
405 | return jfs_mount_rw(sb, 1); | |
406 | } | |
407 | JFS_SBI(sb)->flag = flag; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
413 | { | |
414 | struct jfs_sb_info *sbi; | |
415 | struct inode *inode; | |
416 | int rc; | |
417 | s64 newLVSize = 0; | |
eab1df71 | 418 | int flag, ret = -EINVAL; |
1da177e4 LT |
419 | |
420 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
421 | ||
422 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | |
423 | return -EOVERFLOW; | |
424 | ||
5b3030e3 | 425 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
1da177e4 | 426 | if (!sbi) |
087387f9 | 427 | return -ENOMEM; |
1da177e4 LT |
428 | sb->s_fs_info = sbi; |
429 | sbi->sb = sb; | |
69eb66d7 | 430 | sbi->uid = sbi->gid = sbi->umask = -1; |
1da177e4 LT |
431 | |
432 | /* initialize the mount flag and determine the default error handler */ | |
433 | flag = JFS_ERR_REMOUNT_RO; | |
434 | ||
435 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { | |
436 | kfree(sbi); | |
437 | return -EINVAL; | |
438 | } | |
439 | sbi->flag = flag; | |
440 | ||
441 | #ifdef CONFIG_JFS_POSIX_ACL | |
442 | sb->s_flags |= MS_POSIXACL; | |
443 | #endif | |
444 | ||
445 | if (newLVSize) { | |
446 | printk(KERN_ERR "resize option for remount only\n"); | |
447 | return -EINVAL; | |
448 | } | |
449 | ||
450 | /* | |
451 | * Initialize blocksize to 4K. | |
452 | */ | |
453 | sb_set_blocksize(sb, PSIZE); | |
454 | ||
455 | /* | |
456 | * Set method vectors. | |
457 | */ | |
458 | sb->s_op = &jfs_super_operations; | |
459 | sb->s_export_op = &jfs_export_operations; | |
460 | ||
7fab479b DK |
461 | /* |
462 | * Initialize direct-mapping inode/address-space | |
463 | */ | |
464 | inode = new_inode(sb); | |
eab1df71 DH |
465 | if (inode == NULL) { |
466 | ret = -ENOMEM; | |
7fab479b | 467 | goto out_kfree; |
eab1df71 | 468 | } |
7fab479b DK |
469 | inode->i_ino = 0; |
470 | inode->i_nlink = 1; | |
471 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
472 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 473 | insert_inode_hash(inode); |
7fab479b DK |
474 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
475 | ||
476 | sbi->direct_inode = inode; | |
477 | ||
1da177e4 LT |
478 | rc = jfs_mount(sb); |
479 | if (rc) { | |
480 | if (!silent) { | |
481 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
482 | } | |
7fab479b | 483 | goto out_mount_failed; |
1da177e4 LT |
484 | } |
485 | if (sb->s_flags & MS_RDONLY) | |
486 | sbi->log = NULL; | |
487 | else { | |
488 | rc = jfs_mount_rw(sb, 0); | |
489 | if (rc) { | |
490 | if (!silent) { | |
491 | jfs_err("jfs_mount_rw failed, return code = %d", | |
492 | rc); | |
493 | } | |
494 | goto out_no_rw; | |
495 | } | |
496 | } | |
497 | ||
498 | sb->s_magic = JFS_SUPER_MAGIC; | |
499 | ||
eab1df71 DH |
500 | inode = jfs_iget(sb, ROOT_I); |
501 | if (IS_ERR(inode)) { | |
502 | ret = PTR_ERR(inode); | |
6536d289 | 503 | goto out_no_rw; |
eab1df71 | 504 | } |
1da177e4 LT |
505 | sb->s_root = d_alloc_root(inode); |
506 | if (!sb->s_root) | |
507 | goto out_no_root; | |
508 | ||
509 | if (sbi->mntflag & JFS_OS2) | |
510 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
511 | ||
512 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
513 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
514 | #if BITS_PER_LONG == 32 | |
515 | /* | |
516 | * Page cache is indexed by long. | |
517 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
518 | */ | |
519 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); | |
520 | #endif | |
521 | sb->s_time_gran = 1; | |
522 | return 0; | |
523 | ||
524 | out_no_root: | |
6536d289 DK |
525 | jfs_err("jfs_read_super: get root dentry failed"); |
526 | iput(inode); | |
1da177e4 LT |
527 | |
528 | out_no_rw: | |
529 | rc = jfs_umount(sb); | |
530 | if (rc) { | |
531 | jfs_err("jfs_umount failed with return code %d", rc); | |
532 | } | |
7fab479b | 533 | out_mount_failed: |
28fd1298 | 534 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
535 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
536 | make_bad_inode(sbi->direct_inode); | |
537 | iput(sbi->direct_inode); | |
538 | sbi->direct_inode = NULL; | |
1da177e4 LT |
539 | out_kfree: |
540 | if (sbi->nls_tab) | |
541 | unload_nls(sbi->nls_tab); | |
542 | kfree(sbi); | |
eab1df71 | 543 | return ret; |
1da177e4 LT |
544 | } |
545 | ||
546 | static void jfs_write_super_lockfs(struct super_block *sb) | |
547 | { | |
548 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
549 | struct jfs_log *log = sbi->log; | |
550 | ||
551 | if (!(sb->s_flags & MS_RDONLY)) { | |
552 | txQuiesce(sb); | |
553 | lmLogShutdown(log); | |
554 | updateSuper(sb, FM_CLEAN); | |
555 | } | |
556 | } | |
557 | ||
558 | static void jfs_unlockfs(struct super_block *sb) | |
559 | { | |
560 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
561 | struct jfs_log *log = sbi->log; | |
562 | int rc = 0; | |
563 | ||
564 | if (!(sb->s_flags & MS_RDONLY)) { | |
565 | updateSuper(sb, FM_MOUNT); | |
566 | if ((rc = lmLogInit(log))) | |
567 | jfs_err("jfs_unlock failed with return code %d", rc); | |
568 | else | |
569 | txResume(sb); | |
570 | } | |
571 | } | |
572 | ||
454e2398 DH |
573 | static int jfs_get_sb(struct file_system_type *fs_type, |
574 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 575 | { |
454e2398 DH |
576 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, |
577 | mnt); | |
1da177e4 LT |
578 | } |
579 | ||
580 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
581 | { | |
582 | struct jfs_log *log = JFS_SBI(sb)->log; | |
583 | ||
584 | /* log == NULL indicates read-only mount */ | |
1c627829 | 585 | if (log) { |
1da177e4 | 586 | jfs_flush_journal(log, wait); |
cbc3d65e | 587 | jfs_syncpt(log, 0); |
1c627829 | 588 | } |
1da177e4 LT |
589 | |
590 | return 0; | |
591 | } | |
592 | ||
8fc2751b MB |
593 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
594 | { | |
595 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
596 | ||
69eb66d7 DK |
597 | if (sbi->uid != -1) |
598 | seq_printf(seq, ",uid=%d", sbi->uid); | |
599 | if (sbi->gid != -1) | |
600 | seq_printf(seq, ",gid=%d", sbi->gid); | |
601 | if (sbi->umask != -1) | |
602 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
603 | if (sbi->flag & JFS_NOINTEGRITY) |
604 | seq_puts(seq, ",nointegrity"); | |
5c5e32ce MS |
605 | if (sbi->nls_tab) |
606 | seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); | |
607 | if (sbi->flag & JFS_ERR_CONTINUE) | |
608 | seq_printf(seq, ",errors=continue"); | |
609 | if (sbi->flag & JFS_ERR_PANIC) | |
610 | seq_printf(seq, ",errors=panic"); | |
8fc2751b | 611 | |
115ff50b | 612 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
613 | if (sbi->flag & JFS_USRQUOTA) |
614 | seq_puts(seq, ",usrquota"); | |
615 | ||
616 | if (sbi->flag & JFS_GRPQUOTA) | |
617 | seq_puts(seq, ",grpquota"); | |
618 | #endif | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
115ff50b DK |
623 | #ifdef CONFIG_QUOTA |
624 | ||
625 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
626 | * acquiring the locks... As quota files are never truncated and quota code | |
627 | * itself serializes the operations (and noone else should touch the files) | |
628 | * we don't have to be afraid of races */ | |
629 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
630 | size_t len, loff_t off) | |
631 | { | |
632 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
633 | sector_t blk = off >> sb->s_blocksize_bits; | |
634 | int err = 0; | |
635 | int offset = off & (sb->s_blocksize - 1); | |
636 | int tocopy; | |
637 | size_t toread; | |
638 | struct buffer_head tmp_bh; | |
639 | struct buffer_head *bh; | |
640 | loff_t i_size = i_size_read(inode); | |
641 | ||
642 | if (off > i_size) | |
643 | return 0; | |
644 | if (off+len > i_size) | |
645 | len = i_size-off; | |
646 | toread = len; | |
647 | while (toread > 0) { | |
648 | tocopy = sb->s_blocksize - offset < toread ? | |
649 | sb->s_blocksize - offset : toread; | |
650 | ||
651 | tmp_bh.b_state = 0; | |
652 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
653 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
654 | if (err) | |
655 | return err; | |
656 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
657 | memset(data, 0, tocopy); | |
658 | else { | |
659 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
660 | if (!bh) | |
661 | return -EIO; | |
662 | memcpy(data, bh->b_data+offset, tocopy); | |
663 | brelse(bh); | |
664 | } | |
665 | offset = 0; | |
666 | toread -= tocopy; | |
667 | data += tocopy; | |
668 | blk++; | |
669 | } | |
670 | return len; | |
671 | } | |
672 | ||
673 | /* Write to quotafile */ | |
674 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
675 | const char *data, size_t len, loff_t off) | |
676 | { | |
677 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
678 | sector_t blk = off >> sb->s_blocksize_bits; | |
679 | int err = 0; | |
680 | int offset = off & (sb->s_blocksize - 1); | |
681 | int tocopy; | |
682 | size_t towrite = len; | |
683 | struct buffer_head tmp_bh; | |
684 | struct buffer_head *bh; | |
685 | ||
686 | mutex_lock(&inode->i_mutex); | |
687 | while (towrite > 0) { | |
688 | tocopy = sb->s_blocksize - offset < towrite ? | |
689 | sb->s_blocksize - offset : towrite; | |
690 | ||
691 | tmp_bh.b_state = 0; | |
8bcb2839 | 692 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
693 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
694 | if (err) | |
695 | goto out; | |
696 | if (offset || tocopy != sb->s_blocksize) | |
697 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
698 | else | |
699 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
700 | if (!bh) { | |
701 | err = -EIO; | |
702 | goto out; | |
703 | } | |
704 | lock_buffer(bh); | |
705 | memcpy(bh->b_data+offset, data, tocopy); | |
706 | flush_dcache_page(bh->b_page); | |
707 | set_buffer_uptodate(bh); | |
708 | mark_buffer_dirty(bh); | |
709 | unlock_buffer(bh); | |
710 | brelse(bh); | |
711 | offset = 0; | |
712 | towrite -= tocopy; | |
713 | data += tocopy; | |
714 | blk++; | |
715 | } | |
716 | out: | |
717 | if (len == towrite) | |
718 | return err; | |
719 | if (inode->i_size < off+len-towrite) | |
720 | i_size_write(inode, off+len-towrite); | |
721 | inode->i_version++; | |
722 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
723 | mark_inode_dirty(inode); | |
724 | mutex_unlock(&inode->i_mutex); | |
725 | return len - towrite; | |
726 | } | |
727 | ||
728 | #endif | |
729 | ||
ee9b6d61 | 730 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
731 | .alloc_inode = jfs_alloc_inode, |
732 | .destroy_inode = jfs_destroy_inode, | |
1da177e4 LT |
733 | .dirty_inode = jfs_dirty_inode, |
734 | .write_inode = jfs_write_inode, | |
735 | .delete_inode = jfs_delete_inode, | |
736 | .put_super = jfs_put_super, | |
737 | .sync_fs = jfs_sync_fs, | |
738 | .write_super_lockfs = jfs_write_super_lockfs, | |
739 | .unlockfs = jfs_unlockfs, | |
740 | .statfs = jfs_statfs, | |
741 | .remount_fs = jfs_remount, | |
115ff50b DK |
742 | .show_options = jfs_show_options, |
743 | #ifdef CONFIG_QUOTA | |
744 | .quota_read = jfs_quota_read, | |
745 | .quota_write = jfs_quota_write, | |
746 | #endif | |
1da177e4 LT |
747 | }; |
748 | ||
39655164 | 749 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
750 | .fh_to_dentry = jfs_fh_to_dentry, |
751 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
752 | .get_parent = jfs_get_parent, |
753 | }; | |
754 | ||
755 | static struct file_system_type jfs_fs_type = { | |
756 | .owner = THIS_MODULE, | |
757 | .name = "jfs", | |
758 | .get_sb = jfs_get_sb, | |
759 | .kill_sb = kill_block_super, | |
760 | .fs_flags = FS_REQUIRES_DEV, | |
761 | }; | |
762 | ||
4ba9b9d0 | 763 | static void init_once(struct kmem_cache *cachep, void *foo) |
1da177e4 LT |
764 | { |
765 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
766 | ||
a35afb83 CL |
767 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
768 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
769 | init_rwsem(&jfs_ip->rdwrlock); | |
770 | mutex_init(&jfs_ip->commit_mutex); | |
771 | init_rwsem(&jfs_ip->xattr_sem); | |
772 | spin_lock_init(&jfs_ip->ag_lock); | |
773 | jfs_ip->active_ag = -1; | |
1da177e4 | 774 | #ifdef CONFIG_JFS_POSIX_ACL |
a35afb83 CL |
775 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; |
776 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; | |
1da177e4 | 777 | #endif |
a35afb83 | 778 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
779 | } |
780 | ||
781 | static int __init init_jfs_fs(void) | |
782 | { | |
783 | int i; | |
784 | int rc; | |
785 | ||
786 | jfs_inode_cachep = | |
63f83c9f | 787 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 788 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 789 | init_once); |
1da177e4 LT |
790 | if (jfs_inode_cachep == NULL) |
791 | return -ENOMEM; | |
792 | ||
793 | /* | |
794 | * Metapage initialization | |
795 | */ | |
796 | rc = metapage_init(); | |
797 | if (rc) { | |
798 | jfs_err("metapage_init failed w/rc = %d", rc); | |
799 | goto free_slab; | |
800 | } | |
801 | ||
802 | /* | |
803 | * Transaction Manager initialization | |
804 | */ | |
805 | rc = txInit(); | |
806 | if (rc) { | |
807 | jfs_err("txInit failed w/rc = %d", rc); | |
808 | goto free_metapage; | |
809 | } | |
810 | ||
811 | /* | |
812 | * I/O completion thread (endio) | |
813 | */ | |
91dbb4de CH |
814 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
815 | if (IS_ERR(jfsIOthread)) { | |
816 | rc = PTR_ERR(jfsIOthread); | |
817 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
818 | goto end_txmngr; |
819 | } | |
1da177e4 LT |
820 | |
821 | if (commit_threads < 1) | |
822 | commit_threads = num_online_cpus(); | |
823 | if (commit_threads > MAX_COMMIT_THREADS) | |
824 | commit_threads = MAX_COMMIT_THREADS; | |
825 | ||
826 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
827 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
828 | if (IS_ERR(jfsCommitThread[i])) { | |
829 | rc = PTR_ERR(jfsCommitThread[i]); | |
830 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
831 | commit_threads = i; |
832 | goto kill_committask; | |
833 | } | |
1da177e4 LT |
834 | } |
835 | ||
91dbb4de CH |
836 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
837 | if (IS_ERR(jfsSyncThread)) { | |
838 | rc = PTR_ERR(jfsSyncThread); | |
839 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
840 | goto kill_committask; |
841 | } | |
1da177e4 LT |
842 | |
843 | #ifdef PROC_FS_JFS | |
844 | jfs_proc_init(); | |
845 | #endif | |
846 | ||
847 | return register_filesystem(&jfs_fs_type); | |
848 | ||
849 | kill_committask: | |
1da177e4 | 850 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
851 | kthread_stop(jfsCommitThread[i]); |
852 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
853 | end_txmngr: |
854 | txExit(); | |
855 | free_metapage: | |
856 | metapage_exit(); | |
857 | free_slab: | |
858 | kmem_cache_destroy(jfs_inode_cachep); | |
859 | return rc; | |
860 | } | |
861 | ||
862 | static void __exit exit_jfs_fs(void) | |
863 | { | |
864 | int i; | |
865 | ||
866 | jfs_info("exit_jfs_fs called"); | |
867 | ||
1da177e4 LT |
868 | txExit(); |
869 | metapage_exit(); | |
91dbb4de CH |
870 | |
871 | kthread_stop(jfsIOthread); | |
1da177e4 | 872 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
873 | kthread_stop(jfsCommitThread[i]); |
874 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
875 | #ifdef PROC_FS_JFS |
876 | jfs_proc_clean(); | |
877 | #endif | |
878 | unregister_filesystem(&jfs_fs_type); | |
879 | kmem_cache_destroy(jfs_inode_cachep); | |
880 | } | |
881 | ||
882 | module_init(init_jfs_fs) | |
883 | module_exit(exit_jfs_fs) |