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" | |
47 | ||
48 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
49 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
e18b890b | 52 | static struct kmem_cache * jfs_inode_cachep; |
1da177e4 | 53 | |
ee9b6d61 | 54 | static const struct super_operations jfs_super_operations; |
39655164 | 55 | static const struct export_operations jfs_export_operations; |
1da177e4 LT |
56 | static struct file_system_type jfs_fs_type; |
57 | ||
58 | #define MAX_COMMIT_THREADS 64 | |
59 | static int commit_threads = 0; | |
60 | module_param(commit_threads, int, 0); | |
61 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
62 | ||
91dbb4de CH |
63 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
64 | struct task_struct *jfsIOthread; | |
65 | struct task_struct *jfsSyncThread; | |
1da177e4 LT |
66 | |
67 | #ifdef CONFIG_JFS_DEBUG | |
68 | int jfsloglevel = JFS_LOGLEVEL_WARN; | |
69 | module_param(jfsloglevel, int, 0644); | |
70 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); | |
71 | #endif | |
72 | ||
1da177e4 LT |
73 | static void jfs_handle_error(struct super_block *sb) |
74 | { | |
75 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
76 | ||
77 | if (sb->s_flags & MS_RDONLY) | |
78 | return; | |
79 | ||
80 | updateSuper(sb, FM_DIRTY); | |
81 | ||
82 | if (sbi->flag & JFS_ERR_PANIC) | |
83 | panic("JFS (device %s): panic forced after error\n", | |
84 | sb->s_id); | |
85 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { | |
86 | jfs_err("ERROR: (device %s): remounting filesystem " | |
87 | "as read-only\n", | |
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; | |
120 | return &jfs_inode->vfs_inode; | |
121 | } | |
122 | ||
fa0d7e3d NP |
123 | static void jfs_i_callback(struct rcu_head *head) |
124 | { | |
125 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
126 | struct jfs_inode_info *ji = JFS_IP(inode); | |
fa0d7e3d NP |
127 | kmem_cache_free(jfs_inode_cachep, ji); |
128 | } | |
129 | ||
1da177e4 LT |
130 | static void jfs_destroy_inode(struct inode *inode) |
131 | { | |
132 | struct jfs_inode_info *ji = JFS_IP(inode); | |
133 | ||
8a9cd6d6 DK |
134 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
135 | ||
1da177e4 LT |
136 | spin_lock_irq(&ji->ag_lock); |
137 | if (ji->active_ag != -1) { | |
138 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
139 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
140 | ji->active_ag = -1; | |
141 | } | |
142 | spin_unlock_irq(&ji->ag_lock); | |
fa0d7e3d | 143 | call_rcu(&inode->i_rcu, jfs_i_callback); |
1da177e4 LT |
144 | } |
145 | ||
726c3342 | 146 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 147 | { |
726c3342 | 148 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
149 | s64 maxinodes; |
150 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
151 | ||
152 | jfs_info("In jfs_statfs"); | |
153 | buf->f_type = JFS_SUPER_MAGIC; | |
154 | buf->f_bsize = sbi->bsize; | |
155 | buf->f_blocks = sbi->bmap->db_mapsize; | |
156 | buf->f_bfree = sbi->bmap->db_nfree; | |
157 | buf->f_bavail = sbi->bmap->db_nfree; | |
158 | /* | |
159 | * If we really return the number of allocated & free inodes, some | |
160 | * applications will fail because they won't see enough free inodes. | |
4de80273 | 161 | * We'll try to calculate some guess as to how many inodes we can |
1da177e4 LT |
162 | * really allocate |
163 | * | |
164 | * buf->f_files = atomic_read(&imap->im_numinos); | |
165 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
166 | */ | |
167 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
168 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
169 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
170 | buf->f_files = maxinodes; | |
171 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
172 | atomic_read(&imap->im_numfree)); | |
b5c816a4 CL |
173 | buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); |
174 | buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, | |
175 | sizeof(sbi->uuid)/2); | |
1da177e4 LT |
176 | |
177 | buf->f_namelen = JFS_NAME_MAX; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static void jfs_put_super(struct super_block *sb) | |
182 | { | |
183 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
184 | int rc; | |
185 | ||
186 | jfs_info("In jfs_put_super"); | |
6cfd0148 | 187 | |
e0ccfd95 CH |
188 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
189 | ||
1da177e4 LT |
190 | rc = jfs_umount(sb); |
191 | if (rc) | |
192 | jfs_err("jfs_umount failed with return code %d", rc); | |
6d729e44 TG |
193 | |
194 | unload_nls(sbi->nls_tab); | |
1da177e4 | 195 | |
7fab479b DK |
196 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
197 | iput(sbi->direct_inode); | |
7fab479b | 198 | |
1da177e4 LT |
199 | kfree(sbi); |
200 | } | |
201 | ||
202 | enum { | |
203 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 204 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
b40c2e66 TR |
205 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask, |
206 | Opt_discard, Opt_nodiscard, Opt_discard_minblk | |
1da177e4 LT |
207 | }; |
208 | ||
a447c093 | 209 | static const match_table_t tokens = { |
1da177e4 LT |
210 | {Opt_integrity, "integrity"}, |
211 | {Opt_nointegrity, "nointegrity"}, | |
212 | {Opt_iocharset, "iocharset=%s"}, | |
213 | {Opt_resize, "resize=%u"}, | |
214 | {Opt_resize_nosize, "resize"}, | |
215 | {Opt_errors, "errors=%s"}, | |
216 | {Opt_ignore, "noquota"}, | |
217 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
218 | {Opt_usrquota, "usrquota"}, |
219 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
220 | {Opt_uid, "uid=%u"}, |
221 | {Opt_gid, "gid=%u"}, | |
222 | {Opt_umask, "umask=%u"}, | |
b40c2e66 TR |
223 | {Opt_discard, "discard"}, |
224 | {Opt_nodiscard, "nodiscard"}, | |
225 | {Opt_discard_minblk, "discard=%u"}, | |
1da177e4 LT |
226 | {Opt_err, NULL} |
227 | }; | |
228 | ||
229 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
230 | int *flag) | |
231 | { | |
232 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
233 | char *p; | |
234 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
235 | ||
236 | *newLVSize = 0; | |
237 | ||
238 | if (!options) | |
239 | return 1; | |
240 | ||
241 | while ((p = strsep(&options, ",")) != NULL) { | |
242 | substring_t args[MAX_OPT_ARGS]; | |
243 | int token; | |
244 | if (!*p) | |
245 | continue; | |
246 | ||
247 | token = match_token(p, tokens, args); | |
248 | switch (token) { | |
249 | case Opt_integrity: | |
250 | *flag &= ~JFS_NOINTEGRITY; | |
251 | break; | |
252 | case Opt_nointegrity: | |
253 | *flag |= JFS_NOINTEGRITY; | |
254 | break; | |
255 | case Opt_ignore: | |
256 | /* Silently ignore the quota options */ | |
257 | /* Don't do anything ;-) */ | |
258 | break; | |
259 | case Opt_iocharset: | |
260 | if (nls_map && nls_map != (void *) -1) | |
261 | unload_nls(nls_map); | |
262 | if (!strcmp(args[0].from, "none")) | |
263 | nls_map = NULL; | |
264 | else { | |
265 | nls_map = load_nls(args[0].from); | |
266 | if (!nls_map) { | |
b40c2e66 | 267 | pr_err("JFS: charset not found\n"); |
1da177e4 LT |
268 | goto cleanup; |
269 | } | |
270 | } | |
271 | break; | |
272 | case Opt_resize: | |
273 | { | |
274 | char *resize = args[0].from; | |
275 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
276 | break; | |
277 | } | |
278 | case Opt_resize_nosize: | |
279 | { | |
280 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
281 | sb->s_blocksize_bits; | |
282 | if (*newLVSize == 0) | |
b40c2e66 | 283 | pr_err("JFS: Cannot determine volume size\n"); |
1da177e4 LT |
284 | break; |
285 | } | |
286 | case Opt_errors: | |
287 | { | |
288 | char *errors = args[0].from; | |
289 | if (!errors || !*errors) | |
290 | goto cleanup; | |
291 | if (!strcmp(errors, "continue")) { | |
292 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
293 | *flag &= ~JFS_ERR_PANIC; | |
294 | *flag |= JFS_ERR_CONTINUE; | |
295 | } else if (!strcmp(errors, "remount-ro")) { | |
296 | *flag &= ~JFS_ERR_CONTINUE; | |
297 | *flag &= ~JFS_ERR_PANIC; | |
298 | *flag |= JFS_ERR_REMOUNT_RO; | |
299 | } else if (!strcmp(errors, "panic")) { | |
300 | *flag &= ~JFS_ERR_CONTINUE; | |
301 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
302 | *flag |= JFS_ERR_PANIC; | |
303 | } else { | |
b40c2e66 | 304 | pr_err("JFS: %s is an invalid error handler\n", |
1da177e4 LT |
305 | errors); |
306 | goto cleanup; | |
307 | } | |
308 | break; | |
309 | } | |
8fc2751b | 310 | |
115ff50b | 311 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
312 | case Opt_quota: |
313 | case Opt_usrquota: | |
314 | *flag |= JFS_USRQUOTA; | |
315 | break; | |
316 | case Opt_grpquota: | |
317 | *flag |= JFS_GRPQUOTA; | |
318 | break; | |
319 | #else | |
320 | case Opt_usrquota: | |
321 | case Opt_grpquota: | |
322 | case Opt_quota: | |
b40c2e66 | 323 | pr_err("JFS: quota operations not supported\n"); |
8fc2751b MB |
324 | break; |
325 | #endif | |
69eb66d7 DK |
326 | case Opt_uid: |
327 | { | |
328 | char *uid = args[0].from; | |
c18cdc1a EB |
329 | uid_t val = simple_strtoul(uid, &uid, 0); |
330 | sbi->uid = make_kuid(current_user_ns(), val); | |
331 | if (!uid_valid(sbi->uid)) | |
332 | goto cleanup; | |
69eb66d7 DK |
333 | break; |
334 | } | |
b40c2e66 | 335 | |
69eb66d7 DK |
336 | case Opt_gid: |
337 | { | |
338 | char *gid = args[0].from; | |
c18cdc1a EB |
339 | gid_t val = simple_strtoul(gid, &gid, 0); |
340 | sbi->gid = make_kgid(current_user_ns(), val); | |
341 | if (!gid_valid(sbi->gid)) | |
342 | goto cleanup; | |
69eb66d7 DK |
343 | break; |
344 | } | |
b40c2e66 | 345 | |
69eb66d7 DK |
346 | case Opt_umask: |
347 | { | |
348 | char *umask = args[0].from; | |
349 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
350 | if (sbi->umask & ~0777) { | |
b40c2e66 | 351 | pr_err("JFS: Invalid value of umask\n"); |
69eb66d7 DK |
352 | goto cleanup; |
353 | } | |
354 | break; | |
355 | } | |
b40c2e66 TR |
356 | |
357 | case Opt_discard: | |
358 | { | |
359 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
360 | /* if set to 1, even copying files will cause | |
361 | * trimming :O | |
362 | * -> user has more control over the online trimming | |
363 | */ | |
364 | sbi->minblks_trim = 64; | |
365 | if (blk_queue_discard(q)) { | |
366 | *flag |= JFS_DISCARD; | |
367 | } else { | |
368 | pr_err("JFS: discard option " \ | |
369 | "not supported on device\n"); | |
370 | } | |
371 | break; | |
372 | } | |
373 | ||
374 | case Opt_nodiscard: | |
375 | *flag &= ~JFS_DISCARD; | |
376 | break; | |
377 | ||
378 | case Opt_discard_minblk: | |
379 | { | |
380 | struct request_queue *q = bdev_get_queue(sb->s_bdev); | |
381 | char *minblks_trim = args[0].from; | |
382 | if (blk_queue_discard(q)) { | |
383 | *flag |= JFS_DISCARD; | |
384 | sbi->minblks_trim = simple_strtoull( | |
385 | minblks_trim, &minblks_trim, 0); | |
386 | } else { | |
387 | pr_err("JFS: discard option " \ | |
388 | "not supported on device\n"); | |
389 | } | |
390 | break; | |
391 | } | |
392 | ||
1da177e4 LT |
393 | default: |
394 | printk("jfs: Unrecognized mount option \"%s\" " | |
395 | " or missing value\n", p); | |
396 | goto cleanup; | |
397 | } | |
398 | } | |
399 | ||
400 | if (nls_map != (void *) -1) { | |
401 | /* Discard old (if remount) */ | |
6d729e44 | 402 | unload_nls(sbi->nls_tab); |
1da177e4 LT |
403 | sbi->nls_tab = nls_map; |
404 | } | |
405 | return 1; | |
406 | ||
407 | cleanup: | |
408 | if (nls_map && nls_map != (void *) -1) | |
409 | unload_nls(nls_map); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
414 | { | |
415 | s64 newLVSize = 0; | |
416 | int rc = 0; | |
417 | int flag = JFS_SBI(sb)->flag; | |
337eb00a | 418 | int ret; |
1da177e4 LT |
419 | |
420 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
421 | return -EINVAL; | |
422 | } | |
22b26db6 | 423 | |
1da177e4 LT |
424 | if (newLVSize) { |
425 | if (sb->s_flags & MS_RDONLY) { | |
b40c2e66 TR |
426 | pr_err("JFS: resize requires volume" \ |
427 | " to be mounted read-write\n"); | |
1da177e4 LT |
428 | return -EROFS; |
429 | } | |
430 | rc = jfs_extendfs(sb, newLVSize, 0); | |
22b26db6 | 431 | if (rc) |
1da177e4 LT |
432 | return rc; |
433 | } | |
434 | ||
435 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
436 | /* |
437 | * Invalidate any previously read metadata. fsck may have | |
438 | * changed the on-disk data since we mounted r/o | |
439 | */ | |
440 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
441 | ||
1da177e4 | 442 | JFS_SBI(sb)->flag = flag; |
337eb00a | 443 | ret = jfs_mount_rw(sb, 1); |
c79d967d CH |
444 | |
445 | /* mark the fs r/w for quota activity */ | |
446 | sb->s_flags &= ~MS_RDONLY; | |
447 | ||
0f0dd62f | 448 | dquot_resume(sb, -1); |
337eb00a | 449 | return ret; |
1da177e4 LT |
450 | } |
451 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
0f0dd62f CH |
452 | rc = dquot_suspend(sb, -1); |
453 | if (rc < 0) { | |
0f0dd62f | 454 | return rc; |
c79d967d | 455 | } |
1da177e4 LT |
456 | rc = jfs_umount_rw(sb); |
457 | JFS_SBI(sb)->flag = flag; | |
458 | return rc; | |
459 | } | |
460 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
461 | if (!(sb->s_flags & MS_RDONLY)) { | |
462 | rc = jfs_umount_rw(sb); | |
22b26db6 | 463 | if (rc) |
1da177e4 | 464 | return rc; |
22b26db6 | 465 | |
1da177e4 | 466 | JFS_SBI(sb)->flag = flag; |
337eb00a | 467 | ret = jfs_mount_rw(sb, 1); |
337eb00a | 468 | return ret; |
1da177e4 LT |
469 | } |
470 | JFS_SBI(sb)->flag = flag; | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
476 | { | |
477 | struct jfs_sb_info *sbi; | |
478 | struct inode *inode; | |
479 | int rc; | |
480 | s64 newLVSize = 0; | |
eab1df71 | 481 | int flag, ret = -EINVAL; |
1da177e4 LT |
482 | |
483 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
484 | ||
22b26db6 | 485 | if (!new_valid_dev(sb->s_bdev->bd_dev)) |
1da177e4 LT |
486 | return -EOVERFLOW; |
487 | ||
5b3030e3 | 488 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
22b26db6 | 489 | if (!sbi) |
087387f9 | 490 | return -ENOMEM; |
22b26db6 | 491 | |
1da177e4 | 492 | sb->s_fs_info = sbi; |
8de52778 | 493 | sb->s_max_links = JFS_LINK_MAX; |
1da177e4 | 494 | sbi->sb = sb; |
c18cdc1a EB |
495 | sbi->uid = INVALID_UID; |
496 | sbi->gid = INVALID_GID; | |
497 | sbi->umask = -1; | |
1da177e4 LT |
498 | |
499 | /* initialize the mount flag and determine the default error handler */ | |
500 | flag = JFS_ERR_REMOUNT_RO; | |
501 | ||
684bdc7f JB |
502 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) |
503 | goto out_kfree; | |
1da177e4 LT |
504 | sbi->flag = flag; |
505 | ||
506 | #ifdef CONFIG_JFS_POSIX_ACL | |
507 | sb->s_flags |= MS_POSIXACL; | |
508 | #endif | |
509 | ||
510 | if (newLVSize) { | |
b40c2e66 | 511 | pr_err("resize option for remount only\n"); |
684bdc7f | 512 | goto out_kfree; |
1da177e4 LT |
513 | } |
514 | ||
515 | /* | |
516 | * Initialize blocksize to 4K. | |
517 | */ | |
518 | sb_set_blocksize(sb, PSIZE); | |
519 | ||
520 | /* | |
521 | * Set method vectors. | |
522 | */ | |
523 | sb->s_op = &jfs_super_operations; | |
524 | sb->s_export_op = &jfs_export_operations; | |
123e9caf CH |
525 | #ifdef CONFIG_QUOTA |
526 | sb->dq_op = &dquot_operations; | |
287a8095 | 527 | sb->s_qcop = &dquot_quotactl_ops; |
123e9caf | 528 | #endif |
1da177e4 | 529 | |
7fab479b DK |
530 | /* |
531 | * Initialize direct-mapping inode/address-space | |
532 | */ | |
533 | inode = new_inode(sb); | |
eab1df71 DH |
534 | if (inode == NULL) { |
535 | ret = -ENOMEM; | |
684bdc7f | 536 | goto out_unload; |
eab1df71 | 537 | } |
7fab479b | 538 | inode->i_ino = 0; |
7fab479b DK |
539 | inode->i_size = sb->s_bdev->bd_inode->i_size; |
540 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 541 | insert_inode_hash(inode); |
7fab479b DK |
542 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
543 | ||
544 | sbi->direct_inode = inode; | |
545 | ||
1da177e4 LT |
546 | rc = jfs_mount(sb); |
547 | if (rc) { | |
548 | if (!silent) { | |
549 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
550 | } | |
7fab479b | 551 | goto out_mount_failed; |
1da177e4 LT |
552 | } |
553 | if (sb->s_flags & MS_RDONLY) | |
554 | sbi->log = NULL; | |
555 | else { | |
556 | rc = jfs_mount_rw(sb, 0); | |
557 | if (rc) { | |
558 | if (!silent) { | |
559 | jfs_err("jfs_mount_rw failed, return code = %d", | |
560 | rc); | |
561 | } | |
562 | goto out_no_rw; | |
563 | } | |
564 | } | |
565 | ||
566 | sb->s_magic = JFS_SUPER_MAGIC; | |
567 | ||
94b77bd8 AV |
568 | if (sbi->mntflag & JFS_OS2) |
569 | sb->s_d_op = &jfs_ci_dentry_operations; | |
570 | ||
eab1df71 DH |
571 | inode = jfs_iget(sb, ROOT_I); |
572 | if (IS_ERR(inode)) { | |
573 | ret = PTR_ERR(inode); | |
6536d289 | 574 | goto out_no_rw; |
eab1df71 | 575 | } |
48fde701 | 576 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
577 | if (!sb->s_root) |
578 | goto out_no_root; | |
579 | ||
1da177e4 LT |
580 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ |
581 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
582 | #if BITS_PER_LONG == 32 | |
583 | /* | |
584 | * Page cache is indexed by long. | |
585 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
586 | */ | |
28ba0ec6 | 587 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes); |
1da177e4 LT |
588 | #endif |
589 | sb->s_time_gran = 1; | |
590 | return 0; | |
591 | ||
592 | out_no_root: | |
6536d289 | 593 | jfs_err("jfs_read_super: get root dentry failed"); |
1da177e4 LT |
594 | |
595 | out_no_rw: | |
596 | rc = jfs_umount(sb); | |
597 | if (rc) { | |
598 | jfs_err("jfs_umount failed with return code %d", rc); | |
599 | } | |
7fab479b | 600 | out_mount_failed: |
28fd1298 | 601 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
602 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
603 | make_bad_inode(sbi->direct_inode); | |
604 | iput(sbi->direct_inode); | |
605 | sbi->direct_inode = NULL; | |
684bdc7f | 606 | out_unload: |
1da177e4 LT |
607 | if (sbi->nls_tab) |
608 | unload_nls(sbi->nls_tab); | |
684bdc7f | 609 | out_kfree: |
1da177e4 | 610 | kfree(sbi); |
eab1df71 | 611 | return ret; |
1da177e4 LT |
612 | } |
613 | ||
c4be0c1d | 614 | static int jfs_freeze(struct super_block *sb) |
1da177e4 LT |
615 | { |
616 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
617 | struct jfs_log *log = sbi->log; | |
e9b37667 | 618 | int rc = 0; |
1da177e4 LT |
619 | |
620 | if (!(sb->s_flags & MS_RDONLY)) { | |
621 | txQuiesce(sb); | |
e9b37667 VM |
622 | rc = lmLogShutdown(log); |
623 | if (rc) { | |
eb8630d7 | 624 | jfs_error(sb, "lmLogShutdown failed\n"); |
e9b37667 VM |
625 | |
626 | /* let operations fail rather than hang */ | |
627 | txResume(sb); | |
628 | ||
629 | return rc; | |
630 | } | |
631 | rc = updateSuper(sb, FM_CLEAN); | |
632 | if (rc) { | |
633 | jfs_err("jfs_freeze: updateSuper failed\n"); | |
634 | /* | |
635 | * Don't fail here. Everything succeeded except | |
636 | * marking the superblock clean, so there's really | |
637 | * no harm in leaving it frozen for now. | |
638 | */ | |
639 | } | |
1da177e4 | 640 | } |
c4be0c1d | 641 | return 0; |
1da177e4 LT |
642 | } |
643 | ||
c4be0c1d | 644 | static int jfs_unfreeze(struct super_block *sb) |
1da177e4 LT |
645 | { |
646 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
647 | struct jfs_log *log = sbi->log; | |
648 | int rc = 0; | |
649 | ||
650 | if (!(sb->s_flags & MS_RDONLY)) { | |
e9b37667 VM |
651 | rc = updateSuper(sb, FM_MOUNT); |
652 | if (rc) { | |
eb8630d7 | 653 | jfs_error(sb, "updateSuper failed\n"); |
e9b37667 VM |
654 | goto out; |
655 | } | |
656 | rc = lmLogInit(log); | |
657 | if (rc) | |
eb8630d7 | 658 | jfs_error(sb, "lmLogInit failed\n"); |
e9b37667 VM |
659 | out: |
660 | txResume(sb); | |
1da177e4 | 661 | } |
e9b37667 | 662 | return rc; |
1da177e4 LT |
663 | } |
664 | ||
152a0836 AV |
665 | static struct dentry *jfs_do_mount(struct file_system_type *fs_type, |
666 | int flags, const char *dev_name, void *data) | |
1da177e4 | 667 | { |
152a0836 | 668 | return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super); |
1da177e4 LT |
669 | } |
670 | ||
671 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
672 | { | |
673 | struct jfs_log *log = JFS_SBI(sb)->log; | |
674 | ||
675 | /* log == NULL indicates read-only mount */ | |
1c627829 | 676 | if (log) { |
a1177825 JK |
677 | /* |
678 | * Write quota structures to quota file, sync_blockdev() will | |
679 | * write them to disk later | |
680 | */ | |
681 | dquot_writeback_dquots(sb, -1); | |
1da177e4 | 682 | jfs_flush_journal(log, wait); |
cbc3d65e | 683 | jfs_syncpt(log, 0); |
1c627829 | 684 | } |
1da177e4 LT |
685 | |
686 | return 0; | |
687 | } | |
688 | ||
34c80b1d | 689 | static int jfs_show_options(struct seq_file *seq, struct dentry *root) |
8fc2751b | 690 | { |
34c80b1d | 691 | struct jfs_sb_info *sbi = JFS_SBI(root->d_sb); |
8fc2751b | 692 | |
c18cdc1a EB |
693 | if (uid_valid(sbi->uid)) |
694 | seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid)); | |
695 | if (gid_valid(sbi->gid)) | |
696 | seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid)); | |
69eb66d7 DK |
697 | if (sbi->umask != -1) |
698 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
699 | if (sbi->flag & JFS_NOINTEGRITY) |
700 | seq_puts(seq, ",nointegrity"); | |
b40c2e66 TR |
701 | if (sbi->flag & JFS_DISCARD) |
702 | seq_printf(seq, ",discard=%u", sbi->minblks_trim); | |
5c5e32ce MS |
703 | if (sbi->nls_tab) |
704 | seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); | |
705 | if (sbi->flag & JFS_ERR_CONTINUE) | |
706 | seq_printf(seq, ",errors=continue"); | |
707 | if (sbi->flag & JFS_ERR_PANIC) | |
708 | seq_printf(seq, ",errors=panic"); | |
8fc2751b | 709 | |
115ff50b | 710 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
711 | if (sbi->flag & JFS_USRQUOTA) |
712 | seq_puts(seq, ",usrquota"); | |
713 | ||
714 | if (sbi->flag & JFS_GRPQUOTA) | |
715 | seq_puts(seq, ",grpquota"); | |
716 | #endif | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
115ff50b DK |
721 | #ifdef CONFIG_QUOTA |
722 | ||
723 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
724 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 725 | * itself serializes the operations (and no one else should touch the files) |
115ff50b DK |
726 | * we don't have to be afraid of races */ |
727 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
728 | size_t len, loff_t off) | |
729 | { | |
730 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
731 | sector_t blk = off >> sb->s_blocksize_bits; | |
732 | int err = 0; | |
733 | int offset = off & (sb->s_blocksize - 1); | |
734 | int tocopy; | |
735 | size_t toread; | |
736 | struct buffer_head tmp_bh; | |
737 | struct buffer_head *bh; | |
738 | loff_t i_size = i_size_read(inode); | |
739 | ||
740 | if (off > i_size) | |
741 | return 0; | |
742 | if (off+len > i_size) | |
743 | len = i_size-off; | |
744 | toread = len; | |
745 | while (toread > 0) { | |
746 | tocopy = sb->s_blocksize - offset < toread ? | |
747 | sb->s_blocksize - offset : toread; | |
748 | ||
749 | tmp_bh.b_state = 0; | |
750 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
751 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
752 | if (err) | |
753 | return err; | |
754 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
755 | memset(data, 0, tocopy); | |
756 | else { | |
757 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
758 | if (!bh) | |
759 | return -EIO; | |
760 | memcpy(data, bh->b_data+offset, tocopy); | |
761 | brelse(bh); | |
762 | } | |
763 | offset = 0; | |
764 | toread -= tocopy; | |
765 | data += tocopy; | |
766 | blk++; | |
767 | } | |
768 | return len; | |
769 | } | |
770 | ||
771 | /* Write to quotafile */ | |
772 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
773 | const char *data, size_t len, loff_t off) | |
774 | { | |
775 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
776 | sector_t blk = off >> sb->s_blocksize_bits; | |
777 | int err = 0; | |
778 | int offset = off & (sb->s_blocksize - 1); | |
779 | int tocopy; | |
780 | size_t towrite = len; | |
781 | struct buffer_head tmp_bh; | |
782 | struct buffer_head *bh; | |
783 | ||
784 | mutex_lock(&inode->i_mutex); | |
785 | while (towrite > 0) { | |
786 | tocopy = sb->s_blocksize - offset < towrite ? | |
787 | sb->s_blocksize - offset : towrite; | |
788 | ||
789 | tmp_bh.b_state = 0; | |
8bcb2839 | 790 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
791 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
792 | if (err) | |
793 | goto out; | |
794 | if (offset || tocopy != sb->s_blocksize) | |
795 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
796 | else | |
797 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
798 | if (!bh) { | |
799 | err = -EIO; | |
800 | goto out; | |
801 | } | |
802 | lock_buffer(bh); | |
803 | memcpy(bh->b_data+offset, data, tocopy); | |
804 | flush_dcache_page(bh->b_page); | |
805 | set_buffer_uptodate(bh); | |
806 | mark_buffer_dirty(bh); | |
807 | unlock_buffer(bh); | |
808 | brelse(bh); | |
809 | offset = 0; | |
810 | towrite -= tocopy; | |
811 | data += tocopy; | |
812 | blk++; | |
813 | } | |
814 | out: | |
9c83633a DC |
815 | if (len == towrite) { |
816 | mutex_unlock(&inode->i_mutex); | |
115ff50b | 817 | return err; |
9c83633a | 818 | } |
115ff50b DK |
819 | if (inode->i_size < off+len-towrite) |
820 | i_size_write(inode, off+len-towrite); | |
821 | inode->i_version++; | |
822 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
823 | mark_inode_dirty(inode); | |
824 | mutex_unlock(&inode->i_mutex); | |
825 | return len - towrite; | |
826 | } | |
827 | ||
828 | #endif | |
829 | ||
ee9b6d61 | 830 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
831 | .alloc_inode = jfs_alloc_inode, |
832 | .destroy_inode = jfs_destroy_inode, | |
1da177e4 LT |
833 | .dirty_inode = jfs_dirty_inode, |
834 | .write_inode = jfs_write_inode, | |
62aff86f | 835 | .evict_inode = jfs_evict_inode, |
1da177e4 LT |
836 | .put_super = jfs_put_super, |
837 | .sync_fs = jfs_sync_fs, | |
c4be0c1d TS |
838 | .freeze_fs = jfs_freeze, |
839 | .unfreeze_fs = jfs_unfreeze, | |
1da177e4 LT |
840 | .statfs = jfs_statfs, |
841 | .remount_fs = jfs_remount, | |
115ff50b DK |
842 | .show_options = jfs_show_options, |
843 | #ifdef CONFIG_QUOTA | |
844 | .quota_read = jfs_quota_read, | |
845 | .quota_write = jfs_quota_write, | |
846 | #endif | |
1da177e4 LT |
847 | }; |
848 | ||
39655164 | 849 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
850 | .fh_to_dentry = jfs_fh_to_dentry, |
851 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
852 | .get_parent = jfs_get_parent, |
853 | }; | |
854 | ||
855 | static struct file_system_type jfs_fs_type = { | |
856 | .owner = THIS_MODULE, | |
857 | .name = "jfs", | |
152a0836 | 858 | .mount = jfs_do_mount, |
1da177e4 LT |
859 | .kill_sb = kill_block_super, |
860 | .fs_flags = FS_REQUIRES_DEV, | |
861 | }; | |
7f78e035 | 862 | MODULE_ALIAS_FS("jfs"); |
1da177e4 | 863 | |
51cc5068 | 864 | static void init_once(void *foo) |
1da177e4 LT |
865 | { |
866 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
867 | ||
a35afb83 CL |
868 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
869 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
870 | init_rwsem(&jfs_ip->rdwrlock); | |
871 | mutex_init(&jfs_ip->commit_mutex); | |
872 | init_rwsem(&jfs_ip->xattr_sem); | |
873 | spin_lock_init(&jfs_ip->ag_lock); | |
874 | jfs_ip->active_ag = -1; | |
a35afb83 | 875 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
876 | } |
877 | ||
878 | static int __init init_jfs_fs(void) | |
879 | { | |
880 | int i; | |
881 | int rc; | |
882 | ||
883 | jfs_inode_cachep = | |
63f83c9f | 884 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 885 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 886 | init_once); |
1da177e4 LT |
887 | if (jfs_inode_cachep == NULL) |
888 | return -ENOMEM; | |
889 | ||
890 | /* | |
891 | * Metapage initialization | |
892 | */ | |
893 | rc = metapage_init(); | |
894 | if (rc) { | |
895 | jfs_err("metapage_init failed w/rc = %d", rc); | |
896 | goto free_slab; | |
897 | } | |
898 | ||
899 | /* | |
900 | * Transaction Manager initialization | |
901 | */ | |
902 | rc = txInit(); | |
903 | if (rc) { | |
904 | jfs_err("txInit failed w/rc = %d", rc); | |
905 | goto free_metapage; | |
906 | } | |
907 | ||
908 | /* | |
909 | * I/O completion thread (endio) | |
910 | */ | |
91dbb4de CH |
911 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
912 | if (IS_ERR(jfsIOthread)) { | |
913 | rc = PTR_ERR(jfsIOthread); | |
914 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
915 | goto end_txmngr; |
916 | } | |
1da177e4 LT |
917 | |
918 | if (commit_threads < 1) | |
919 | commit_threads = num_online_cpus(); | |
920 | if (commit_threads > MAX_COMMIT_THREADS) | |
921 | commit_threads = MAX_COMMIT_THREADS; | |
922 | ||
923 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
924 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
925 | if (IS_ERR(jfsCommitThread[i])) { | |
926 | rc = PTR_ERR(jfsCommitThread[i]); | |
927 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
928 | commit_threads = i; |
929 | goto kill_committask; | |
930 | } | |
1da177e4 LT |
931 | } |
932 | ||
91dbb4de CH |
933 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
934 | if (IS_ERR(jfsSyncThread)) { | |
935 | rc = PTR_ERR(jfsSyncThread); | |
936 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
937 | goto kill_committask; |
938 | } | |
1da177e4 LT |
939 | |
940 | #ifdef PROC_FS_JFS | |
941 | jfs_proc_init(); | |
942 | #endif | |
943 | ||
76bf09fc AV |
944 | rc = register_filesystem(&jfs_fs_type); |
945 | if (!rc) | |
946 | return 0; | |
1da177e4 | 947 | |
76bf09fc AV |
948 | #ifdef PROC_FS_JFS |
949 | jfs_proc_clean(); | |
950 | #endif | |
951 | kthread_stop(jfsSyncThread); | |
1da177e4 | 952 | kill_committask: |
1da177e4 | 953 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
954 | kthread_stop(jfsCommitThread[i]); |
955 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
956 | end_txmngr: |
957 | txExit(); | |
958 | free_metapage: | |
959 | metapage_exit(); | |
960 | free_slab: | |
961 | kmem_cache_destroy(jfs_inode_cachep); | |
962 | return rc; | |
963 | } | |
964 | ||
965 | static void __exit exit_jfs_fs(void) | |
966 | { | |
967 | int i; | |
968 | ||
969 | jfs_info("exit_jfs_fs called"); | |
970 | ||
1da177e4 LT |
971 | txExit(); |
972 | metapage_exit(); | |
91dbb4de CH |
973 | |
974 | kthread_stop(jfsIOthread); | |
1da177e4 | 975 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
976 | kthread_stop(jfsCommitThread[i]); |
977 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
978 | #ifdef PROC_FS_JFS |
979 | jfs_proc_clean(); | |
980 | #endif | |
981 | unregister_filesystem(&jfs_fs_type); | |
8c0a8537 KS |
982 | |
983 | /* | |
984 | * Make sure all delayed rcu free inodes are flushed before we | |
985 | * destroy cache. | |
986 | */ | |
987 | rcu_barrier(); | |
1da177e4 LT |
988 | kmem_cache_destroy(jfs_inode_cachep); |
989 | } | |
990 | ||
991 | module_init(init_jfs_fs) | |
992 | module_exit(exit_jfs_fs) |