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> |
b5c816a4 | 32 | #include <linux/crc32.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 | 34 | #include <asm/uaccess.h> |
8fc2751b | 35 | #include <linux/seq_file.h> |
b40c2e66 | 36 | #include <linux/blkdev.h> |
1da177e4 LT |
37 | |
38 | #include "jfs_incore.h" | |
39 | #include "jfs_filsys.h" | |
1868f4aa | 40 | #include "jfs_inode.h" |
1da177e4 LT |
41 | #include "jfs_metapage.h" |
42 | #include "jfs_superblock.h" | |
43 | #include "jfs_dmap.h" | |
44 | #include "jfs_imap.h" | |
45 | #include "jfs_acl.h" | |
46 | #include "jfs_debug.h" | |
2cc6a5a0 | 47 | #include "jfs_xattr.h" |
1da177e4 LT |
48 | |
49 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
50 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
789602e9 | 53 | static struct kmem_cache *jfs_inode_cachep; |
1da177e4 | 54 | |
ee9b6d61 | 55 | static const struct super_operations jfs_super_operations; |
39655164 | 56 | static const struct export_operations jfs_export_operations; |
1da177e4 LT |
57 | static struct file_system_type jfs_fs_type; |
58 | ||
59 | #define MAX_COMMIT_THREADS 64 | |
789602e9 | 60 | static int commit_threads; |
1da177e4 LT |
61 | module_param(commit_threads, int, 0); |
62 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
63 | ||
91dbb4de CH |
64 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
65 | struct task_struct *jfsIOthread; | |
66 | struct task_struct *jfsSyncThread; | |
1da177e4 LT |
67 | |
68 | #ifdef CONFIG_JFS_DEBUG | |
69 | int jfsloglevel = JFS_LOGLEVEL_WARN; | |
70 | module_param(jfsloglevel, int, 0644); | |
71 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); | |
72 | #endif | |
73 | ||
1da177e4 LT |
74 | static void jfs_handle_error(struct super_block *sb) |
75 | { | |
76 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
77 | ||
78 | if (sb->s_flags & MS_RDONLY) | |
79 | return; | |
80 | ||
81 | updateSuper(sb, FM_DIRTY); | |
82 | ||
83 | if (sbi->flag & JFS_ERR_PANIC) | |
84 | panic("JFS (device %s): panic forced after error\n", | |
85 | sb->s_id); | |
86 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { | |
789602e9 | 87 | jfs_err("ERROR: (device %s): remounting filesystem as read-only\n", |
1da177e4 LT |
88 | sb->s_id); |
89 | sb->s_flags |= MS_RDONLY; | |
63f83c9f | 90 | } |
1da177e4 LT |
91 | |
92 | /* nothing is done for continue beyond marking the superblock dirty */ | |
93 | } | |
94 | ||
eb8630d7 | 95 | void jfs_error(struct super_block *sb, const char *fmt, ...) |
1da177e4 | 96 | { |
eb8630d7 | 97 | struct va_format vaf; |
1da177e4 LT |
98 | va_list args; |
99 | ||
eb8630d7 JP |
100 | va_start(args, fmt); |
101 | ||
102 | vaf.fmt = fmt; | |
103 | vaf.va = &args; | |
1da177e4 | 104 | |
eb8630d7 JP |
105 | pr_err("ERROR: (device %s): %pf: %pV\n", |
106 | sb->s_id, __builtin_return_address(0), &vaf); | |
107 | ||
108 | va_end(args); | |
1da177e4 LT |
109 | |
110 | jfs_handle_error(sb); | |
111 | } | |
112 | ||
113 | static struct inode *jfs_alloc_inode(struct super_block *sb) | |
114 | { | |
115 | struct jfs_inode_info *jfs_inode; | |
116 | ||
117 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); | |
118 | if (!jfs_inode) | |
119 | return NULL; | |
507e1fa6 JK |
120 | #ifdef CONFIG_QUOTA |
121 | memset(&jfs_inode->i_dquot, 0, sizeof(jfs_inode->i_dquot)); | |
122 | #endif | |
1da177e4 LT |
123 | return &jfs_inode->vfs_inode; |
124 | } | |
125 | ||
fa0d7e3d NP |
126 | static void jfs_i_callback(struct rcu_head *head) |
127 | { | |
128 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
129 | struct jfs_inode_info *ji = JFS_IP(inode); | |
fa0d7e3d NP |
130 | kmem_cache_free(jfs_inode_cachep, ji); |
131 | } | |
132 | ||
1da177e4 LT |
133 | static void jfs_destroy_inode(struct inode *inode) |
134 | { | |
135 | struct jfs_inode_info *ji = JFS_IP(inode); | |
136 | ||
8a9cd6d6 DK |
137 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
138 | ||
1da177e4 LT |
139 | spin_lock_irq(&ji->ag_lock); |
140 | if (ji->active_ag != -1) { | |
141 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
142 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
143 | ji->active_ag = -1; | |
144 | } | |
145 | spin_unlock_irq(&ji->ag_lock); | |
fa0d7e3d | 146 | call_rcu(&inode->i_rcu, jfs_i_callback); |
1da177e4 LT |
147 | } |
148 | ||
726c3342 | 149 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 150 | { |
726c3342 | 151 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
152 | s64 maxinodes; |
153 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
154 | ||
155 | jfs_info("In jfs_statfs"); | |
156 | buf->f_type = JFS_SUPER_MAGIC; | |
157 | buf->f_bsize = sbi->bsize; | |
158 | buf->f_blocks = sbi->bmap->db_mapsize; | |
159 | buf->f_bfree = sbi->bmap->db_nfree; | |
160 | buf->f_bavail = sbi->bmap->db_nfree; | |
161 | /* | |
162 | * If we really return the number of allocated & free inodes, some | |
163 | * applications will fail because they won't see enough free inodes. | |
4de80273 | 164 | * We'll try to calculate some guess as to how many inodes we can |
1da177e4 LT |
165 | * really allocate |
166 | * | |
167 | * buf->f_files = atomic_read(&imap->im_numinos); | |
168 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
169 | */ | |
170 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
171 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
172 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
173 | buf->f_files = maxinodes; | |
174 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
175 | atomic_read(&imap->im_numfree)); | |
b5c816a4 CL |
176 | buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); |
177 | buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, | |
178 | sizeof(sbi->uuid)/2); | |
1da177e4 LT |
179 | |
180 | buf->f_namelen = JFS_NAME_MAX; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static void jfs_put_super(struct super_block *sb) | |
185 | { | |
186 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
187 | int rc; | |
188 | ||
189 | jfs_info("In jfs_put_super"); | |
6cfd0148 | 190 | |
e0ccfd95 CH |
191 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
192 | ||
1da177e4 LT |
193 | rc = jfs_umount(sb); |
194 | if (rc) | |
195 | jfs_err("jfs_umount failed with return code %d", rc); | |
6d729e44 TG |
196 | |
197 | unload_nls(sbi->nls_tab); | |
1da177e4 | 198 | |
7fab479b DK |
199 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
200 | iput(sbi->direct_inode); | |
7fab479b | 201 | |
1da177e4 LT |
202 | kfree(sbi); |
203 | } | |
204 | ||
205 | enum { | |
206 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 207 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
b40c2e66 TR |
208 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask, |
209 | Opt_discard, Opt_nodiscard, Opt_discard_minblk | |
1da177e4 LT |
210 | }; |
211 | ||
a447c093 | 212 | static const match_table_t tokens = { |
1da177e4 LT |
213 | {Opt_integrity, "integrity"}, |
214 | {Opt_nointegrity, "nointegrity"}, | |
215 | {Opt_iocharset, "iocharset=%s"}, | |
216 | {Opt_resize, "resize=%u"}, | |
217 | {Opt_resize_nosize, "resize"}, | |
218 | {Opt_errors, "errors=%s"}, | |
219 | {Opt_ignore, "noquota"}, | |
220 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
221 | {Opt_usrquota, "usrquota"}, |
222 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
223 | {Opt_uid, "uid=%u"}, |
224 | {Opt_gid, "gid=%u"}, | |
225 | {Opt_umask, "umask=%u"}, | |
b40c2e66 TR |
226 | {Opt_discard, "discard"}, |
227 | {Opt_nodiscard, "nodiscard"}, | |
228 | {Opt_discard_minblk, "discard=%u"}, | |
1da177e4 LT |
229 | {Opt_err, NULL} |
230 | }; | |
231 | ||
232 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
233 | int *flag) | |
234 | { | |
235 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
236 | char *p; | |
237 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
238 | ||
239 | *newLVSize = 0; | |
240 | ||
241 | if (!options) | |
242 | return 1; | |
243 | ||
244 | while ((p = strsep(&options, ",")) != NULL) { | |
245 | substring_t args[MAX_OPT_ARGS]; | |
246 | int token; | |
247 | if (!*p) | |
248 | continue; | |
249 | ||
250 | token = match_token(p, tokens, args); | |
251 | switch (token) { | |
252 | case Opt_integrity: | |
253 | *flag &= ~JFS_NOINTEGRITY; | |
254 | break; | |
255 | case Opt_nointegrity: | |
256 | *flag |= JFS_NOINTEGRITY; | |
257 | break; | |
258 | case Opt_ignore: | |
259 | /* Silently ignore the quota options */ | |
260 | /* Don't do anything ;-) */ | |
261 | break; | |
262 | case Opt_iocharset: | |
263 | if (nls_map && nls_map != (void *) -1) | |
264 | unload_nls(nls_map); | |
265 | if (!strcmp(args[0].from, "none")) | |
266 | nls_map = NULL; | |
267 | else { | |
268 | nls_map = load_nls(args[0].from); | |
269 | if (!nls_map) { | |
b40c2e66 | 270 | pr_err("JFS: charset not found\n"); |
1da177e4 LT |
271 | goto cleanup; |
272 | } | |
273 | } | |
274 | break; | |
275 | case Opt_resize: | |
276 | { | |
277 | char *resize = args[0].from; | |
bb5e50aa FF |
278 | int rc = kstrtoll(resize, 0, newLVSize); |
279 | ||
280 | if (rc) | |
281 | goto cleanup; | |
1da177e4 LT |
282 | break; |
283 | } | |
284 | case Opt_resize_nosize: | |
285 | { | |
286 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
287 | sb->s_blocksize_bits; | |
288 | if (*newLVSize == 0) | |
b40c2e66 | 289 | pr_err("JFS: Cannot determine volume size\n"); |
1da177e4 LT |
290 | break; |
291 | } | |
292 | case Opt_errors: | |
293 | { | |
294 | char *errors = args[0].from; | |
295 | if (!errors || !*errors) | |
296 | goto cleanup; | |
297 | if (!strcmp(errors, "continue")) { | |
298 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
299 | *flag &= ~JFS_ERR_PANIC; | |
300 | *flag |= JFS_ERR_CONTINUE; | |
301 | } else if (!strcmp(errors, "remount-ro")) { | |
302 | *flag &= ~JFS_ERR_CONTINUE; | |
303 | *flag &= ~JFS_ERR_PANIC; | |
304 | *flag |= JFS_ERR_REMOUNT_RO; | |
305 | } else if (!strcmp(errors, "panic")) { | |
306 | *flag &= ~JFS_ERR_CONTINUE; | |
307 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
308 | *flag |= JFS_ERR_PANIC; | |
309 | } else { | |
b40c2e66 | 310 | pr_err("JFS: %s is an invalid error handler\n", |
1da177e4 LT |
311 | errors); |
312 | goto cleanup; | |
313 | } | |
314 | break; | |
315 | } | |
8fc2751b | 316 | |
115ff50b | 317 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
318 | case Opt_quota: |
319 | case Opt_usrquota: | |
320 | *flag |= JFS_USRQUOTA; | |
321 | break; | |
322 | case Opt_grpquota: | |
323 | *flag |= JFS_GRPQUOTA; | |
324 | break; | |
325 | #else | |
326 | case Opt_usrquota: | |
327 | case Opt_grpquota: | |
328 | case Opt_quota: | |
b40c2e66 | 329 | pr_err("JFS: quota operations not supported\n"); |
8fc2751b MB |
330 | break; |
331 | #endif | |
69eb66d7 DK |
332 | case Opt_uid: |
333 | { | |
334 | char *uid = args[0].from; | |
bb5e50aa FF |
335 | uid_t val; |
336 | int rc = kstrtouint(uid, 0, &val); | |
337 | ||
338 | if (rc) | |
339 | goto cleanup; | |
c18cdc1a EB |
340 | sbi->uid = make_kuid(current_user_ns(), val); |
341 | if (!uid_valid(sbi->uid)) | |
342 | goto cleanup; | |
69eb66d7 DK |
343 | break; |
344 | } | |
b40c2e66 | 345 | |
69eb66d7 DK |
346 | case Opt_gid: |
347 | { | |
348 | char *gid = args[0].from; | |
bb5e50aa FF |
349 | gid_t val; |
350 | int rc = kstrtouint(gid, 0, &val); | |
351 | ||
352 | if (rc) | |
353 | goto cleanup; | |
c18cdc1a EB |
354 | sbi->gid = make_kgid(current_user_ns(), val); |
355 | if (!gid_valid(sbi->gid)) | |
356 | goto cleanup; | |
69eb66d7 DK |
357 | break; |
358 | } | |
b40c2e66 | 359 | |
69eb66d7 DK |
360 | case Opt_umask: |
361 | { | |
362 | char *umask = args[0].from; | |
bb5e50aa FF |
363 | int rc = kstrtouint(umask, 8, &sbi->umask); |
364 | ||
365 | if (rc) | |
366 | goto cleanup; | |
69eb66d7 | 367 | if (sbi->umask & ~0777) { |
b40c2e66 | 368 | pr_err("JFS: Invalid value of umask\n"); |
69eb66d7 DK |
369 | goto cleanup; |
370 | } | |
371 | break; | |
372 | } | |
b40c2e66 TR |
373 | |
374 | case Opt_discard: | |
375 | { | |
376 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
377 | /* if set to 1, even copying files will cause | |
378 | * trimming :O | |
379 | * -> user has more control over the online trimming | |
380 | */ | |
381 | sbi->minblks_trim = 64; | |
789602e9 | 382 | if (blk_queue_discard(q)) |
b40c2e66 | 383 | *flag |= JFS_DISCARD; |
789602e9 FF |
384 | else |
385 | pr_err("JFS: discard option not supported on device\n"); | |
b40c2e66 TR |
386 | break; |
387 | } | |
388 | ||
389 | case Opt_nodiscard: | |
390 | *flag &= ~JFS_DISCARD; | |
391 | break; | |
392 | ||
393 | case Opt_discard_minblk: | |
394 | { | |
395 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
396 | char *minblks_trim = args[0].from; | |
bb5e50aa | 397 | int rc; |
b40c2e66 TR |
398 | if (blk_queue_discard(q)) { |
399 | *flag |= JFS_DISCARD; | |
bb5e50aa FF |
400 | rc = kstrtouint(minblks_trim, 0, |
401 | &sbi->minblks_trim); | |
402 | if (rc) | |
403 | goto cleanup; | |
404 | } else | |
789602e9 | 405 | pr_err("JFS: discard option not supported on device\n"); |
b40c2e66 TR |
406 | break; |
407 | } | |
408 | ||
1da177e4 | 409 | default: |
789602e9 FF |
410 | printk("jfs: Unrecognized mount option \"%s\" or missing value\n", |
411 | p); | |
1da177e4 LT |
412 | goto cleanup; |
413 | } | |
414 | } | |
415 | ||
416 | if (nls_map != (void *) -1) { | |
417 | /* Discard old (if remount) */ | |
6d729e44 | 418 | unload_nls(sbi->nls_tab); |
1da177e4 LT |
419 | sbi->nls_tab = nls_map; |
420 | } | |
421 | return 1; | |
422 | ||
423 | cleanup: | |
424 | if (nls_map && nls_map != (void *) -1) | |
425 | unload_nls(nls_map); | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
430 | { | |
431 | s64 newLVSize = 0; | |
432 | int rc = 0; | |
433 | int flag = JFS_SBI(sb)->flag; | |
337eb00a | 434 | int ret; |
1da177e4 | 435 | |
02b9984d | 436 | sync_filesystem(sb); |
789602e9 | 437 | if (!parse_options(data, sb, &newLVSize, &flag)) |
1da177e4 | 438 | return -EINVAL; |
22b26db6 | 439 | |
1da177e4 LT |
440 | if (newLVSize) { |
441 | if (sb->s_flags & MS_RDONLY) { | |
789602e9 | 442 | pr_err("JFS: resize requires volume to be mounted read-write\n"); |
1da177e4 LT |
443 | return -EROFS; |
444 | } | |
445 | rc = jfs_extendfs(sb, newLVSize, 0); | |
22b26db6 | 446 | if (rc) |
1da177e4 LT |
447 | return rc; |
448 | } | |
449 | ||
450 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
451 | /* |
452 | * Invalidate any previously read metadata. fsck may have | |
453 | * changed the on-disk data since we mounted r/o | |
454 | */ | |
455 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
456 | ||
1da177e4 | 457 | JFS_SBI(sb)->flag = flag; |
337eb00a | 458 | ret = jfs_mount_rw(sb, 1); |
c79d967d CH |
459 | |
460 | /* mark the fs r/w for quota activity */ | |
461 | sb->s_flags &= ~MS_RDONLY; | |
462 | ||
0f0dd62f | 463 | dquot_resume(sb, -1); |
337eb00a | 464 | return ret; |
1da177e4 LT |
465 | } |
466 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
0f0dd62f | 467 | rc = dquot_suspend(sb, -1); |
789602e9 | 468 | if (rc < 0) |
0f0dd62f | 469 | return rc; |
1da177e4 LT |
470 | rc = jfs_umount_rw(sb); |
471 | JFS_SBI(sb)->flag = flag; | |
472 | return rc; | |
473 | } | |
474 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
475 | if (!(sb->s_flags & MS_RDONLY)) { | |
476 | rc = jfs_umount_rw(sb); | |
22b26db6 | 477 | if (rc) |
1da177e4 | 478 | return rc; |
22b26db6 | 479 | |
1da177e4 | 480 | JFS_SBI(sb)->flag = flag; |
337eb00a | 481 | ret = jfs_mount_rw(sb, 1); |
337eb00a | 482 | return ret; |
1da177e4 LT |
483 | } |
484 | JFS_SBI(sb)->flag = flag; | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
490 | { | |
491 | struct jfs_sb_info *sbi; | |
492 | struct inode *inode; | |
493 | int rc; | |
494 | s64 newLVSize = 0; | |
eab1df71 | 495 | int flag, ret = -EINVAL; |
1da177e4 LT |
496 | |
497 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
498 | ||
22b26db6 | 499 | if (!new_valid_dev(sb->s_bdev->bd_dev)) |
1da177e4 LT |
500 | return -EOVERFLOW; |
501 | ||
789602e9 | 502 | sbi = kzalloc(sizeof(struct jfs_sb_info), GFP_KERNEL); |
22b26db6 | 503 | if (!sbi) |
087387f9 | 504 | return -ENOMEM; |
22b26db6 | 505 | |
1da177e4 | 506 | sb->s_fs_info = sbi; |
8de52778 | 507 | sb->s_max_links = JFS_LINK_MAX; |
1da177e4 | 508 | sbi->sb = sb; |
c18cdc1a EB |
509 | sbi->uid = INVALID_UID; |
510 | sbi->gid = INVALID_GID; | |
511 | sbi->umask = -1; | |
1da177e4 LT |
512 | |
513 | /* initialize the mount flag and determine the default error handler */ | |
514 | flag = JFS_ERR_REMOUNT_RO; | |
515 | ||
684bdc7f JB |
516 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) |
517 | goto out_kfree; | |
1da177e4 LT |
518 | sbi->flag = flag; |
519 | ||
520 | #ifdef CONFIG_JFS_POSIX_ACL | |
521 | sb->s_flags |= MS_POSIXACL; | |
522 | #endif | |
523 | ||
524 | if (newLVSize) { | |
b40c2e66 | 525 | pr_err("resize option for remount only\n"); |
684bdc7f | 526 | goto out_kfree; |
1da177e4 LT |
527 | } |
528 | ||
529 | /* | |
530 | * Initialize blocksize to 4K. | |
531 | */ | |
532 | sb_set_blocksize(sb, PSIZE); | |
533 | ||
534 | /* | |
535 | * Set method vectors. | |
536 | */ | |
537 | sb->s_op = &jfs_super_operations; | |
538 | sb->s_export_op = &jfs_export_operations; | |
2cc6a5a0 | 539 | sb->s_xattr = jfs_xattr_handlers; |
123e9caf CH |
540 | #ifdef CONFIG_QUOTA |
541 | sb->dq_op = &dquot_operations; | |
287a8095 | 542 | sb->s_qcop = &dquot_quotactl_ops; |
507e1fa6 | 543 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
123e9caf | 544 | #endif |
1da177e4 | 545 | |
7fab479b DK |
546 | /* |
547 | * Initialize direct-mapping inode/address-space | |
548 | */ | |
549 | inode = new_inode(sb); | |
eab1df71 DH |
550 | if (inode == NULL) { |
551 | ret = -ENOMEM; | |
684bdc7f | 552 | goto out_unload; |
eab1df71 | 553 | } |
7fab479b | 554 | inode->i_ino = 0; |
7fab479b DK |
555 | inode->i_size = sb->s_bdev->bd_inode->i_size; |
556 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
9bb8730e | 557 | hlist_add_fake(&inode->i_hash); |
7fab479b DK |
558 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
559 | ||
560 | sbi->direct_inode = inode; | |
561 | ||
1da177e4 LT |
562 | rc = jfs_mount(sb); |
563 | if (rc) { | |
789602e9 | 564 | if (!silent) |
1da177e4 | 565 | jfs_err("jfs_mount failed w/return code = %d", rc); |
7fab479b | 566 | goto out_mount_failed; |
1da177e4 LT |
567 | } |
568 | if (sb->s_flags & MS_RDONLY) | |
569 | sbi->log = NULL; | |
570 | else { | |
571 | rc = jfs_mount_rw(sb, 0); | |
572 | if (rc) { | |
573 | if (!silent) { | |
574 | jfs_err("jfs_mount_rw failed, return code = %d", | |
575 | rc); | |
576 | } | |
577 | goto out_no_rw; | |
578 | } | |
579 | } | |
580 | ||
581 | sb->s_magic = JFS_SUPER_MAGIC; | |
582 | ||
94b77bd8 AV |
583 | if (sbi->mntflag & JFS_OS2) |
584 | sb->s_d_op = &jfs_ci_dentry_operations; | |
585 | ||
eab1df71 DH |
586 | inode = jfs_iget(sb, ROOT_I); |
587 | if (IS_ERR(inode)) { | |
588 | ret = PTR_ERR(inode); | |
6536d289 | 589 | goto out_no_rw; |
eab1df71 | 590 | } |
48fde701 | 591 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
592 | if (!sb->s_root) |
593 | goto out_no_root; | |
594 | ||
1da177e4 LT |
595 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ |
596 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
597 | #if BITS_PER_LONG == 32 | |
598 | /* | |
599 | * Page cache is indexed by long. | |
600 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
601 | */ | |
789602e9 FF |
602 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, |
603 | (u64)sb->s_maxbytes); | |
1da177e4 LT |
604 | #endif |
605 | sb->s_time_gran = 1; | |
606 | return 0; | |
607 | ||
608 | out_no_root: | |
6536d289 | 609 | jfs_err("jfs_read_super: get root dentry failed"); |
1da177e4 LT |
610 | |
611 | out_no_rw: | |
612 | rc = jfs_umount(sb); | |
789602e9 | 613 | if (rc) |
1da177e4 | 614 | jfs_err("jfs_umount failed with return code %d", rc); |
7fab479b | 615 | out_mount_failed: |
28fd1298 | 616 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
617 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
618 | make_bad_inode(sbi->direct_inode); | |
619 | iput(sbi->direct_inode); | |
620 | sbi->direct_inode = NULL; | |
684bdc7f | 621 | out_unload: |
648695c7 | 622 | unload_nls(sbi->nls_tab); |
684bdc7f | 623 | out_kfree: |
1da177e4 | 624 | kfree(sbi); |
eab1df71 | 625 | return ret; |
1da177e4 LT |
626 | } |
627 | ||
c4be0c1d | 628 | static int jfs_freeze(struct super_block *sb) |
1da177e4 LT |
629 | { |
630 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
631 | struct jfs_log *log = sbi->log; | |
e9b37667 | 632 | int rc = 0; |
1da177e4 LT |
633 | |
634 | if (!(sb->s_flags & MS_RDONLY)) { | |
635 | txQuiesce(sb); | |
e9b37667 VM |
636 | rc = lmLogShutdown(log); |
637 | if (rc) { | |
eb8630d7 | 638 | jfs_error(sb, "lmLogShutdown failed\n"); |
e9b37667 VM |
639 | |
640 | /* let operations fail rather than hang */ | |
641 | txResume(sb); | |
642 | ||
643 | return rc; | |
644 | } | |
645 | rc = updateSuper(sb, FM_CLEAN); | |
646 | if (rc) { | |
647 | jfs_err("jfs_freeze: updateSuper failed\n"); | |
648 | /* | |
649 | * Don't fail here. Everything succeeded except | |
650 | * marking the superblock clean, so there's really | |
651 | * no harm in leaving it frozen for now. | |
652 | */ | |
653 | } | |
1da177e4 | 654 | } |
c4be0c1d | 655 | return 0; |
1da177e4 LT |
656 | } |
657 | ||
c4be0c1d | 658 | static int jfs_unfreeze(struct super_block *sb) |
1da177e4 LT |
659 | { |
660 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
661 | struct jfs_log *log = sbi->log; | |
662 | int rc = 0; | |
663 | ||
664 | if (!(sb->s_flags & MS_RDONLY)) { | |
e9b37667 VM |
665 | rc = updateSuper(sb, FM_MOUNT); |
666 | if (rc) { | |
eb8630d7 | 667 | jfs_error(sb, "updateSuper failed\n"); |
e9b37667 VM |
668 | goto out; |
669 | } | |
670 | rc = lmLogInit(log); | |
671 | if (rc) | |
eb8630d7 | 672 | jfs_error(sb, "lmLogInit failed\n"); |
e9b37667 VM |
673 | out: |
674 | txResume(sb); | |
1da177e4 | 675 | } |
e9b37667 | 676 | return rc; |
1da177e4 LT |
677 | } |
678 | ||
152a0836 AV |
679 | static struct dentry *jfs_do_mount(struct file_system_type *fs_type, |
680 | int flags, const char *dev_name, void *data) | |
1da177e4 | 681 | { |
152a0836 | 682 | return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super); |
1da177e4 LT |
683 | } |
684 | ||
685 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
686 | { | |
687 | struct jfs_log *log = JFS_SBI(sb)->log; | |
688 | ||
689 | /* log == NULL indicates read-only mount */ | |
1c627829 | 690 | if (log) { |
a1177825 JK |
691 | /* |
692 | * Write quota structures to quota file, sync_blockdev() will | |
693 | * write them to disk later | |
694 | */ | |
695 | dquot_writeback_dquots(sb, -1); | |
1da177e4 | 696 | jfs_flush_journal(log, wait); |
cbc3d65e | 697 | jfs_syncpt(log, 0); |
1c627829 | 698 | } |
1da177e4 LT |
699 | |
700 | return 0; | |
701 | } | |
702 | ||
34c80b1d | 703 | static int jfs_show_options(struct seq_file *seq, struct dentry *root) |
8fc2751b | 704 | { |
34c80b1d | 705 | struct jfs_sb_info *sbi = JFS_SBI(root->d_sb); |
8fc2751b | 706 | |
c18cdc1a EB |
707 | if (uid_valid(sbi->uid)) |
708 | seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid)); | |
709 | if (gid_valid(sbi->gid)) | |
710 | seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid)); | |
69eb66d7 DK |
711 | if (sbi->umask != -1) |
712 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
713 | if (sbi->flag & JFS_NOINTEGRITY) |
714 | seq_puts(seq, ",nointegrity"); | |
b40c2e66 TR |
715 | if (sbi->flag & JFS_DISCARD) |
716 | seq_printf(seq, ",discard=%u", sbi->minblks_trim); | |
5c5e32ce MS |
717 | if (sbi->nls_tab) |
718 | seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); | |
719 | if (sbi->flag & JFS_ERR_CONTINUE) | |
720 | seq_printf(seq, ",errors=continue"); | |
721 | if (sbi->flag & JFS_ERR_PANIC) | |
722 | seq_printf(seq, ",errors=panic"); | |
8fc2751b | 723 | |
115ff50b | 724 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
725 | if (sbi->flag & JFS_USRQUOTA) |
726 | seq_puts(seq, ",usrquota"); | |
727 | ||
728 | if (sbi->flag & JFS_GRPQUOTA) | |
729 | seq_puts(seq, ",grpquota"); | |
730 | #endif | |
731 | ||
732 | return 0; | |
733 | } | |
734 | ||
115ff50b DK |
735 | #ifdef CONFIG_QUOTA |
736 | ||
737 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
738 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 739 | * itself serializes the operations (and no one else should touch the files) |
115ff50b DK |
740 | * we don't have to be afraid of races */ |
741 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
742 | size_t len, loff_t off) | |
743 | { | |
744 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
745 | sector_t blk = off >> sb->s_blocksize_bits; | |
746 | int err = 0; | |
747 | int offset = off & (sb->s_blocksize - 1); | |
748 | int tocopy; | |
749 | size_t toread; | |
750 | struct buffer_head tmp_bh; | |
751 | struct buffer_head *bh; | |
752 | loff_t i_size = i_size_read(inode); | |
753 | ||
754 | if (off > i_size) | |
755 | return 0; | |
756 | if (off+len > i_size) | |
757 | len = i_size-off; | |
758 | toread = len; | |
759 | while (toread > 0) { | |
760 | tocopy = sb->s_blocksize - offset < toread ? | |
761 | sb->s_blocksize - offset : toread; | |
762 | ||
763 | tmp_bh.b_state = 0; | |
764 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
765 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
766 | if (err) | |
767 | return err; | |
768 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
769 | memset(data, 0, tocopy); | |
770 | else { | |
771 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
772 | if (!bh) | |
773 | return -EIO; | |
774 | memcpy(data, bh->b_data+offset, tocopy); | |
775 | brelse(bh); | |
776 | } | |
777 | offset = 0; | |
778 | toread -= tocopy; | |
779 | data += tocopy; | |
780 | blk++; | |
781 | } | |
782 | return len; | |
783 | } | |
784 | ||
785 | /* Write to quotafile */ | |
786 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
787 | const char *data, size_t len, loff_t off) | |
788 | { | |
789 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
790 | sector_t blk = off >> sb->s_blocksize_bits; | |
791 | int err = 0; | |
792 | int offset = off & (sb->s_blocksize - 1); | |
793 | int tocopy; | |
794 | size_t towrite = len; | |
795 | struct buffer_head tmp_bh; | |
796 | struct buffer_head *bh; | |
797 | ||
798 | mutex_lock(&inode->i_mutex); | |
799 | while (towrite > 0) { | |
800 | tocopy = sb->s_blocksize - offset < towrite ? | |
801 | sb->s_blocksize - offset : towrite; | |
802 | ||
803 | tmp_bh.b_state = 0; | |
8bcb2839 | 804 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
805 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
806 | if (err) | |
807 | goto out; | |
808 | if (offset || tocopy != sb->s_blocksize) | |
809 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
810 | else | |
811 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
812 | if (!bh) { | |
813 | err = -EIO; | |
814 | goto out; | |
815 | } | |
816 | lock_buffer(bh); | |
817 | memcpy(bh->b_data+offset, data, tocopy); | |
818 | flush_dcache_page(bh->b_page); | |
819 | set_buffer_uptodate(bh); | |
820 | mark_buffer_dirty(bh); | |
821 | unlock_buffer(bh); | |
822 | brelse(bh); | |
823 | offset = 0; | |
824 | towrite -= tocopy; | |
825 | data += tocopy; | |
826 | blk++; | |
827 | } | |
828 | out: | |
9c83633a DC |
829 | if (len == towrite) { |
830 | mutex_unlock(&inode->i_mutex); | |
115ff50b | 831 | return err; |
9c83633a | 832 | } |
115ff50b DK |
833 | if (inode->i_size < off+len-towrite) |
834 | i_size_write(inode, off+len-towrite); | |
835 | inode->i_version++; | |
836 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
837 | mark_inode_dirty(inode); | |
838 | mutex_unlock(&inode->i_mutex); | |
839 | return len - towrite; | |
840 | } | |
841 | ||
507e1fa6 JK |
842 | static struct dquot **jfs_get_dquots(struct inode *inode) |
843 | { | |
844 | return JFS_IP(inode)->i_dquot; | |
845 | } | |
115ff50b DK |
846 | #endif |
847 | ||
ee9b6d61 | 848 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
849 | .alloc_inode = jfs_alloc_inode, |
850 | .destroy_inode = jfs_destroy_inode, | |
1da177e4 LT |
851 | .dirty_inode = jfs_dirty_inode, |
852 | .write_inode = jfs_write_inode, | |
62aff86f | 853 | .evict_inode = jfs_evict_inode, |
1da177e4 LT |
854 | .put_super = jfs_put_super, |
855 | .sync_fs = jfs_sync_fs, | |
c4be0c1d TS |
856 | .freeze_fs = jfs_freeze, |
857 | .unfreeze_fs = jfs_unfreeze, | |
1da177e4 LT |
858 | .statfs = jfs_statfs, |
859 | .remount_fs = jfs_remount, | |
115ff50b DK |
860 | .show_options = jfs_show_options, |
861 | #ifdef CONFIG_QUOTA | |
862 | .quota_read = jfs_quota_read, | |
863 | .quota_write = jfs_quota_write, | |
507e1fa6 | 864 | .get_dquots = jfs_get_dquots, |
115ff50b | 865 | #endif |
1da177e4 LT |
866 | }; |
867 | ||
39655164 | 868 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
869 | .fh_to_dentry = jfs_fh_to_dentry, |
870 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
871 | .get_parent = jfs_get_parent, |
872 | }; | |
873 | ||
874 | static struct file_system_type jfs_fs_type = { | |
875 | .owner = THIS_MODULE, | |
876 | .name = "jfs", | |
152a0836 | 877 | .mount = jfs_do_mount, |
1da177e4 LT |
878 | .kill_sb = kill_block_super, |
879 | .fs_flags = FS_REQUIRES_DEV, | |
880 | }; | |
7f78e035 | 881 | MODULE_ALIAS_FS("jfs"); |
1da177e4 | 882 | |
51cc5068 | 883 | static void init_once(void *foo) |
1da177e4 LT |
884 | { |
885 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
886 | ||
a35afb83 CL |
887 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
888 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
889 | init_rwsem(&jfs_ip->rdwrlock); | |
890 | mutex_init(&jfs_ip->commit_mutex); | |
891 | init_rwsem(&jfs_ip->xattr_sem); | |
892 | spin_lock_init(&jfs_ip->ag_lock); | |
893 | jfs_ip->active_ag = -1; | |
a35afb83 | 894 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
895 | } |
896 | ||
897 | static int __init init_jfs_fs(void) | |
898 | { | |
899 | int i; | |
900 | int rc; | |
901 | ||
902 | jfs_inode_cachep = | |
63f83c9f | 903 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 904 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 905 | init_once); |
1da177e4 LT |
906 | if (jfs_inode_cachep == NULL) |
907 | return -ENOMEM; | |
908 | ||
909 | /* | |
910 | * Metapage initialization | |
911 | */ | |
912 | rc = metapage_init(); | |
913 | if (rc) { | |
914 | jfs_err("metapage_init failed w/rc = %d", rc); | |
915 | goto free_slab; | |
916 | } | |
917 | ||
918 | /* | |
919 | * Transaction Manager initialization | |
920 | */ | |
921 | rc = txInit(); | |
922 | if (rc) { | |
923 | jfs_err("txInit failed w/rc = %d", rc); | |
924 | goto free_metapage; | |
925 | } | |
926 | ||
927 | /* | |
928 | * I/O completion thread (endio) | |
929 | */ | |
91dbb4de CH |
930 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
931 | if (IS_ERR(jfsIOthread)) { | |
932 | rc = PTR_ERR(jfsIOthread); | |
933 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
934 | goto end_txmngr; |
935 | } | |
1da177e4 LT |
936 | |
937 | if (commit_threads < 1) | |
938 | commit_threads = num_online_cpus(); | |
939 | if (commit_threads > MAX_COMMIT_THREADS) | |
940 | commit_threads = MAX_COMMIT_THREADS; | |
941 | ||
942 | for (i = 0; i < commit_threads; i++) { | |
789602e9 FF |
943 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, |
944 | "jfsCommit"); | |
91dbb4de CH |
945 | if (IS_ERR(jfsCommitThread[i])) { |
946 | rc = PTR_ERR(jfsCommitThread[i]); | |
947 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
948 | commit_threads = i; |
949 | goto kill_committask; | |
950 | } | |
1da177e4 LT |
951 | } |
952 | ||
91dbb4de CH |
953 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
954 | if (IS_ERR(jfsSyncThread)) { | |
955 | rc = PTR_ERR(jfsSyncThread); | |
956 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
957 | goto kill_committask; |
958 | } | |
1da177e4 LT |
959 | |
960 | #ifdef PROC_FS_JFS | |
961 | jfs_proc_init(); | |
962 | #endif | |
963 | ||
76bf09fc AV |
964 | rc = register_filesystem(&jfs_fs_type); |
965 | if (!rc) | |
966 | return 0; | |
1da177e4 | 967 | |
76bf09fc AV |
968 | #ifdef PROC_FS_JFS |
969 | jfs_proc_clean(); | |
970 | #endif | |
971 | kthread_stop(jfsSyncThread); | |
1da177e4 | 972 | kill_committask: |
1da177e4 | 973 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
974 | kthread_stop(jfsCommitThread[i]); |
975 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
976 | end_txmngr: |
977 | txExit(); | |
978 | free_metapage: | |
979 | metapage_exit(); | |
980 | free_slab: | |
981 | kmem_cache_destroy(jfs_inode_cachep); | |
982 | return rc; | |
983 | } | |
984 | ||
985 | static void __exit exit_jfs_fs(void) | |
986 | { | |
987 | int i; | |
988 | ||
989 | jfs_info("exit_jfs_fs called"); | |
990 | ||
1da177e4 LT |
991 | txExit(); |
992 | metapage_exit(); | |
91dbb4de CH |
993 | |
994 | kthread_stop(jfsIOthread); | |
1da177e4 | 995 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
996 | kthread_stop(jfsCommitThread[i]); |
997 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
998 | #ifdef PROC_FS_JFS |
999 | jfs_proc_clean(); | |
1000 | #endif | |
1001 | unregister_filesystem(&jfs_fs_type); | |
8c0a8537 KS |
1002 | |
1003 | /* | |
1004 | * Make sure all delayed rcu free inodes are flushed before we | |
1005 | * destroy cache. | |
1006 | */ | |
1007 | rcu_barrier(); | |
1da177e4 LT |
1008 | kmem_cache_destroy(jfs_inode_cachep); |
1009 | } | |
1010 | ||
1011 | module_init(init_jfs_fs) | |
1012 | module_exit(exit_jfs_fs) |