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> |
337eb00a | 36 | #include <linux/smp_lock.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 | ||
95 | void jfs_error(struct super_block *sb, const char * function, ...) | |
96 | { | |
97 | static char error_buf[256]; | |
98 | va_list args; | |
99 | ||
100 | va_start(args, function); | |
4a6e617a | 101 | vsnprintf(error_buf, sizeof(error_buf), function, args); |
1da177e4 LT |
102 | va_end(args); |
103 | ||
104 | printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); | |
105 | ||
106 | jfs_handle_error(sb); | |
107 | } | |
108 | ||
109 | static struct inode *jfs_alloc_inode(struct super_block *sb) | |
110 | { | |
111 | struct jfs_inode_info *jfs_inode; | |
112 | ||
113 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); | |
114 | if (!jfs_inode) | |
115 | return NULL; | |
116 | return &jfs_inode->vfs_inode; | |
117 | } | |
118 | ||
119 | static void jfs_destroy_inode(struct inode *inode) | |
120 | { | |
121 | struct jfs_inode_info *ji = JFS_IP(inode); | |
122 | ||
8a9cd6d6 DK |
123 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
124 | ||
1da177e4 LT |
125 | spin_lock_irq(&ji->ag_lock); |
126 | if (ji->active_ag != -1) { | |
127 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
128 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
129 | ji->active_ag = -1; | |
130 | } | |
131 | spin_unlock_irq(&ji->ag_lock); | |
1da177e4 LT |
132 | kmem_cache_free(jfs_inode_cachep, ji); |
133 | } | |
134 | ||
257ba15c CH |
135 | static void jfs_clear_inode(struct inode *inode) |
136 | { | |
9f754758 | 137 | dquot_drop(inode); |
257ba15c CH |
138 | } |
139 | ||
726c3342 | 140 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 141 | { |
726c3342 | 142 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
143 | s64 maxinodes; |
144 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
145 | ||
146 | jfs_info("In jfs_statfs"); | |
147 | buf->f_type = JFS_SUPER_MAGIC; | |
148 | buf->f_bsize = sbi->bsize; | |
149 | buf->f_blocks = sbi->bmap->db_mapsize; | |
150 | buf->f_bfree = sbi->bmap->db_nfree; | |
151 | buf->f_bavail = sbi->bmap->db_nfree; | |
152 | /* | |
153 | * If we really return the number of allocated & free inodes, some | |
154 | * applications will fail because they won't see enough free inodes. | |
155 | * We'll try to calculate some guess as to how may inodes we can | |
156 | * really allocate | |
157 | * | |
158 | * buf->f_files = atomic_read(&imap->im_numinos); | |
159 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
160 | */ | |
161 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
162 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
163 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
164 | buf->f_files = maxinodes; | |
165 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
166 | atomic_read(&imap->im_numfree)); | |
b5c816a4 CL |
167 | buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); |
168 | buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, | |
169 | sizeof(sbi->uuid)/2); | |
1da177e4 LT |
170 | |
171 | buf->f_namelen = JFS_NAME_MAX; | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static void jfs_put_super(struct super_block *sb) | |
176 | { | |
177 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
178 | int rc; | |
179 | ||
180 | jfs_info("In jfs_put_super"); | |
6cfd0148 | 181 | |
e0ccfd95 CH |
182 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
183 | ||
6cfd0148 CH |
184 | lock_kernel(); |
185 | ||
1da177e4 LT |
186 | rc = jfs_umount(sb); |
187 | if (rc) | |
188 | jfs_err("jfs_umount failed with return code %d", rc); | |
6d729e44 TG |
189 | |
190 | unload_nls(sbi->nls_tab); | |
1da177e4 | 191 | |
7fab479b DK |
192 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
193 | iput(sbi->direct_inode); | |
7fab479b | 194 | |
1da177e4 | 195 | kfree(sbi); |
6cfd0148 CH |
196 | |
197 | unlock_kernel(); | |
1da177e4 LT |
198 | } |
199 | ||
200 | enum { | |
201 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 202 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
69eb66d7 | 203 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
1da177e4 LT |
204 | }; |
205 | ||
a447c093 | 206 | static const match_table_t tokens = { |
1da177e4 LT |
207 | {Opt_integrity, "integrity"}, |
208 | {Opt_nointegrity, "nointegrity"}, | |
209 | {Opt_iocharset, "iocharset=%s"}, | |
210 | {Opt_resize, "resize=%u"}, | |
211 | {Opt_resize_nosize, "resize"}, | |
212 | {Opt_errors, "errors=%s"}, | |
213 | {Opt_ignore, "noquota"}, | |
214 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
215 | {Opt_usrquota, "usrquota"}, |
216 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
217 | {Opt_uid, "uid=%u"}, |
218 | {Opt_gid, "gid=%u"}, | |
219 | {Opt_umask, "umask=%u"}, | |
1da177e4 LT |
220 | {Opt_err, NULL} |
221 | }; | |
222 | ||
223 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
224 | int *flag) | |
225 | { | |
226 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
227 | char *p; | |
228 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
229 | ||
230 | *newLVSize = 0; | |
231 | ||
232 | if (!options) | |
233 | return 1; | |
234 | ||
235 | while ((p = strsep(&options, ",")) != NULL) { | |
236 | substring_t args[MAX_OPT_ARGS]; | |
237 | int token; | |
238 | if (!*p) | |
239 | continue; | |
240 | ||
241 | token = match_token(p, tokens, args); | |
242 | switch (token) { | |
243 | case Opt_integrity: | |
244 | *flag &= ~JFS_NOINTEGRITY; | |
245 | break; | |
246 | case Opt_nointegrity: | |
247 | *flag |= JFS_NOINTEGRITY; | |
248 | break; | |
249 | case Opt_ignore: | |
250 | /* Silently ignore the quota options */ | |
251 | /* Don't do anything ;-) */ | |
252 | break; | |
253 | case Opt_iocharset: | |
254 | if (nls_map && nls_map != (void *) -1) | |
255 | unload_nls(nls_map); | |
256 | if (!strcmp(args[0].from, "none")) | |
257 | nls_map = NULL; | |
258 | else { | |
259 | nls_map = load_nls(args[0].from); | |
260 | if (!nls_map) { | |
261 | printk(KERN_ERR | |
262 | "JFS: charset not found\n"); | |
263 | goto cleanup; | |
264 | } | |
265 | } | |
266 | break; | |
267 | case Opt_resize: | |
268 | { | |
269 | char *resize = args[0].from; | |
270 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
271 | break; | |
272 | } | |
273 | case Opt_resize_nosize: | |
274 | { | |
275 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
276 | sb->s_blocksize_bits; | |
277 | if (*newLVSize == 0) | |
278 | printk(KERN_ERR | |
279 | "JFS: Cannot determine volume size\n"); | |
280 | break; | |
281 | } | |
282 | case Opt_errors: | |
283 | { | |
284 | char *errors = args[0].from; | |
285 | if (!errors || !*errors) | |
286 | goto cleanup; | |
287 | if (!strcmp(errors, "continue")) { | |
288 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
289 | *flag &= ~JFS_ERR_PANIC; | |
290 | *flag |= JFS_ERR_CONTINUE; | |
291 | } else if (!strcmp(errors, "remount-ro")) { | |
292 | *flag &= ~JFS_ERR_CONTINUE; | |
293 | *flag &= ~JFS_ERR_PANIC; | |
294 | *flag |= JFS_ERR_REMOUNT_RO; | |
295 | } else if (!strcmp(errors, "panic")) { | |
296 | *flag &= ~JFS_ERR_CONTINUE; | |
297 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
298 | *flag |= JFS_ERR_PANIC; | |
299 | } else { | |
300 | printk(KERN_ERR | |
301 | "JFS: %s is an invalid error handler\n", | |
302 | errors); | |
303 | goto cleanup; | |
304 | } | |
305 | break; | |
306 | } | |
8fc2751b | 307 | |
115ff50b | 308 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
309 | case Opt_quota: |
310 | case Opt_usrquota: | |
311 | *flag |= JFS_USRQUOTA; | |
312 | break; | |
313 | case Opt_grpquota: | |
314 | *flag |= JFS_GRPQUOTA; | |
315 | break; | |
316 | #else | |
317 | case Opt_usrquota: | |
318 | case Opt_grpquota: | |
319 | case Opt_quota: | |
320 | printk(KERN_ERR | |
321 | "JFS: quota operations not supported\n"); | |
322 | break; | |
323 | #endif | |
69eb66d7 DK |
324 | case Opt_uid: |
325 | { | |
326 | char *uid = args[0].from; | |
327 | sbi->uid = simple_strtoul(uid, &uid, 0); | |
328 | break; | |
329 | } | |
330 | case Opt_gid: | |
331 | { | |
332 | char *gid = args[0].from; | |
333 | sbi->gid = simple_strtoul(gid, &gid, 0); | |
334 | break; | |
335 | } | |
336 | case Opt_umask: | |
337 | { | |
338 | char *umask = args[0].from; | |
339 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
340 | if (sbi->umask & ~0777) { | |
341 | printk(KERN_ERR | |
342 | "JFS: Invalid value of umask\n"); | |
343 | goto cleanup; | |
344 | } | |
345 | break; | |
346 | } | |
1da177e4 LT |
347 | default: |
348 | printk("jfs: Unrecognized mount option \"%s\" " | |
349 | " or missing value\n", p); | |
350 | goto cleanup; | |
351 | } | |
352 | } | |
353 | ||
354 | if (nls_map != (void *) -1) { | |
355 | /* Discard old (if remount) */ | |
6d729e44 | 356 | unload_nls(sbi->nls_tab); |
1da177e4 LT |
357 | sbi->nls_tab = nls_map; |
358 | } | |
359 | return 1; | |
360 | ||
361 | cleanup: | |
362 | if (nls_map && nls_map != (void *) -1) | |
363 | unload_nls(nls_map); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
368 | { | |
369 | s64 newLVSize = 0; | |
370 | int rc = 0; | |
371 | int flag = JFS_SBI(sb)->flag; | |
337eb00a | 372 | int ret; |
1da177e4 LT |
373 | |
374 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
375 | return -EINVAL; | |
376 | } | |
337eb00a | 377 | lock_kernel(); |
1da177e4 LT |
378 | if (newLVSize) { |
379 | if (sb->s_flags & MS_RDONLY) { | |
380 | printk(KERN_ERR | |
381 | "JFS: resize requires volume to be mounted read-write\n"); | |
337eb00a | 382 | unlock_kernel(); |
1da177e4 LT |
383 | return -EROFS; |
384 | } | |
385 | rc = jfs_extendfs(sb, newLVSize, 0); | |
337eb00a AIB |
386 | if (rc) { |
387 | unlock_kernel(); | |
1da177e4 | 388 | return rc; |
337eb00a | 389 | } |
1da177e4 LT |
390 | } |
391 | ||
392 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
393 | /* |
394 | * Invalidate any previously read metadata. fsck may have | |
395 | * changed the on-disk data since we mounted r/o | |
396 | */ | |
397 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
398 | ||
1da177e4 | 399 | JFS_SBI(sb)->flag = flag; |
337eb00a | 400 | ret = jfs_mount_rw(sb, 1); |
c79d967d CH |
401 | |
402 | /* mark the fs r/w for quota activity */ | |
403 | sb->s_flags &= ~MS_RDONLY; | |
404 | ||
337eb00a | 405 | unlock_kernel(); |
0f0dd62f | 406 | dquot_resume(sb, -1); |
337eb00a | 407 | return ret; |
1da177e4 LT |
408 | } |
409 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
0f0dd62f CH |
410 | rc = dquot_suspend(sb, -1); |
411 | if (rc < 0) { | |
c79d967d | 412 | unlock_kernel(); |
0f0dd62f | 413 | return rc; |
c79d967d | 414 | } |
1da177e4 LT |
415 | rc = jfs_umount_rw(sb); |
416 | JFS_SBI(sb)->flag = flag; | |
337eb00a | 417 | unlock_kernel(); |
1da177e4 LT |
418 | return rc; |
419 | } | |
420 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
421 | if (!(sb->s_flags & MS_RDONLY)) { | |
422 | rc = jfs_umount_rw(sb); | |
337eb00a AIB |
423 | if (rc) { |
424 | unlock_kernel(); | |
1da177e4 | 425 | return rc; |
337eb00a | 426 | } |
1da177e4 | 427 | JFS_SBI(sb)->flag = flag; |
337eb00a AIB |
428 | ret = jfs_mount_rw(sb, 1); |
429 | unlock_kernel(); | |
430 | return ret; | |
1da177e4 LT |
431 | } |
432 | JFS_SBI(sb)->flag = flag; | |
433 | ||
337eb00a | 434 | unlock_kernel(); |
1da177e4 LT |
435 | return 0; |
436 | } | |
437 | ||
438 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
439 | { | |
440 | struct jfs_sb_info *sbi; | |
441 | struct inode *inode; | |
442 | int rc; | |
443 | s64 newLVSize = 0; | |
eab1df71 | 444 | int flag, ret = -EINVAL; |
1da177e4 LT |
445 | |
446 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
447 | ||
448 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | |
449 | return -EOVERFLOW; | |
450 | ||
5b3030e3 | 451 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
1da177e4 | 452 | if (!sbi) |
087387f9 | 453 | return -ENOMEM; |
1da177e4 LT |
454 | sb->s_fs_info = sbi; |
455 | sbi->sb = sb; | |
69eb66d7 | 456 | sbi->uid = sbi->gid = sbi->umask = -1; |
1da177e4 LT |
457 | |
458 | /* initialize the mount flag and determine the default error handler */ | |
459 | flag = JFS_ERR_REMOUNT_RO; | |
460 | ||
684bdc7f JB |
461 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) |
462 | goto out_kfree; | |
1da177e4 LT |
463 | sbi->flag = flag; |
464 | ||
465 | #ifdef CONFIG_JFS_POSIX_ACL | |
466 | sb->s_flags |= MS_POSIXACL; | |
467 | #endif | |
468 | ||
469 | if (newLVSize) { | |
470 | printk(KERN_ERR "resize option for remount only\n"); | |
684bdc7f | 471 | goto out_kfree; |
1da177e4 LT |
472 | } |
473 | ||
474 | /* | |
475 | * Initialize blocksize to 4K. | |
476 | */ | |
477 | sb_set_blocksize(sb, PSIZE); | |
478 | ||
479 | /* | |
480 | * Set method vectors. | |
481 | */ | |
482 | sb->s_op = &jfs_super_operations; | |
483 | sb->s_export_op = &jfs_export_operations; | |
123e9caf CH |
484 | #ifdef CONFIG_QUOTA |
485 | sb->dq_op = &dquot_operations; | |
287a8095 | 486 | sb->s_qcop = &dquot_quotactl_ops; |
123e9caf | 487 | #endif |
1da177e4 | 488 | |
7fab479b DK |
489 | /* |
490 | * Initialize direct-mapping inode/address-space | |
491 | */ | |
492 | inode = new_inode(sb); | |
eab1df71 DH |
493 | if (inode == NULL) { |
494 | ret = -ENOMEM; | |
684bdc7f | 495 | goto out_unload; |
eab1df71 | 496 | } |
7fab479b DK |
497 | inode->i_ino = 0; |
498 | inode->i_nlink = 1; | |
499 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
500 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 501 | insert_inode_hash(inode); |
7fab479b DK |
502 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
503 | ||
504 | sbi->direct_inode = inode; | |
505 | ||
1da177e4 LT |
506 | rc = jfs_mount(sb); |
507 | if (rc) { | |
508 | if (!silent) { | |
509 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
510 | } | |
7fab479b | 511 | goto out_mount_failed; |
1da177e4 LT |
512 | } |
513 | if (sb->s_flags & MS_RDONLY) | |
514 | sbi->log = NULL; | |
515 | else { | |
516 | rc = jfs_mount_rw(sb, 0); | |
517 | if (rc) { | |
518 | if (!silent) { | |
519 | jfs_err("jfs_mount_rw failed, return code = %d", | |
520 | rc); | |
521 | } | |
522 | goto out_no_rw; | |
523 | } | |
524 | } | |
525 | ||
526 | sb->s_magic = JFS_SUPER_MAGIC; | |
527 | ||
eab1df71 DH |
528 | inode = jfs_iget(sb, ROOT_I); |
529 | if (IS_ERR(inode)) { | |
530 | ret = PTR_ERR(inode); | |
6536d289 | 531 | goto out_no_rw; |
eab1df71 | 532 | } |
1da177e4 LT |
533 | sb->s_root = d_alloc_root(inode); |
534 | if (!sb->s_root) | |
535 | goto out_no_root; | |
536 | ||
537 | if (sbi->mntflag & JFS_OS2) | |
538 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
539 | ||
540 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
541 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
542 | #if BITS_PER_LONG == 32 | |
543 | /* | |
544 | * Page cache is indexed by long. | |
545 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
546 | */ | |
28ba0ec6 | 547 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes); |
1da177e4 LT |
548 | #endif |
549 | sb->s_time_gran = 1; | |
550 | return 0; | |
551 | ||
552 | out_no_root: | |
6536d289 DK |
553 | jfs_err("jfs_read_super: get root dentry failed"); |
554 | iput(inode); | |
1da177e4 LT |
555 | |
556 | out_no_rw: | |
557 | rc = jfs_umount(sb); | |
558 | if (rc) { | |
559 | jfs_err("jfs_umount failed with return code %d", rc); | |
560 | } | |
7fab479b | 561 | out_mount_failed: |
28fd1298 | 562 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
563 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
564 | make_bad_inode(sbi->direct_inode); | |
565 | iput(sbi->direct_inode); | |
566 | sbi->direct_inode = NULL; | |
684bdc7f | 567 | out_unload: |
1da177e4 LT |
568 | if (sbi->nls_tab) |
569 | unload_nls(sbi->nls_tab); | |
684bdc7f | 570 | out_kfree: |
1da177e4 | 571 | kfree(sbi); |
eab1df71 | 572 | return ret; |
1da177e4 LT |
573 | } |
574 | ||
c4be0c1d | 575 | static int jfs_freeze(struct super_block *sb) |
1da177e4 LT |
576 | { |
577 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
578 | struct jfs_log *log = sbi->log; | |
579 | ||
580 | if (!(sb->s_flags & MS_RDONLY)) { | |
581 | txQuiesce(sb); | |
582 | lmLogShutdown(log); | |
583 | updateSuper(sb, FM_CLEAN); | |
584 | } | |
c4be0c1d | 585 | return 0; |
1da177e4 LT |
586 | } |
587 | ||
c4be0c1d | 588 | static int jfs_unfreeze(struct super_block *sb) |
1da177e4 LT |
589 | { |
590 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
591 | struct jfs_log *log = sbi->log; | |
592 | int rc = 0; | |
593 | ||
594 | if (!(sb->s_flags & MS_RDONLY)) { | |
595 | updateSuper(sb, FM_MOUNT); | |
596 | if ((rc = lmLogInit(log))) | |
597 | jfs_err("jfs_unlock failed with return code %d", rc); | |
598 | else | |
599 | txResume(sb); | |
600 | } | |
c4be0c1d | 601 | return 0; |
1da177e4 LT |
602 | } |
603 | ||
454e2398 DH |
604 | static int jfs_get_sb(struct file_system_type *fs_type, |
605 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 606 | { |
454e2398 DH |
607 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, |
608 | mnt); | |
1da177e4 LT |
609 | } |
610 | ||
611 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
612 | { | |
613 | struct jfs_log *log = JFS_SBI(sb)->log; | |
614 | ||
615 | /* log == NULL indicates read-only mount */ | |
1c627829 | 616 | if (log) { |
1da177e4 | 617 | jfs_flush_journal(log, wait); |
cbc3d65e | 618 | jfs_syncpt(log, 0); |
1c627829 | 619 | } |
1da177e4 LT |
620 | |
621 | return 0; | |
622 | } | |
623 | ||
8fc2751b MB |
624 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
625 | { | |
626 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
627 | ||
69eb66d7 DK |
628 | if (sbi->uid != -1) |
629 | seq_printf(seq, ",uid=%d", sbi->uid); | |
630 | if (sbi->gid != -1) | |
631 | seq_printf(seq, ",gid=%d", sbi->gid); | |
632 | if (sbi->umask != -1) | |
633 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
634 | if (sbi->flag & JFS_NOINTEGRITY) |
635 | seq_puts(seq, ",nointegrity"); | |
5c5e32ce MS |
636 | if (sbi->nls_tab) |
637 | seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); | |
638 | if (sbi->flag & JFS_ERR_CONTINUE) | |
639 | seq_printf(seq, ",errors=continue"); | |
640 | if (sbi->flag & JFS_ERR_PANIC) | |
641 | seq_printf(seq, ",errors=panic"); | |
8fc2751b | 642 | |
115ff50b | 643 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
644 | if (sbi->flag & JFS_USRQUOTA) |
645 | seq_puts(seq, ",usrquota"); | |
646 | ||
647 | if (sbi->flag & JFS_GRPQUOTA) | |
648 | seq_puts(seq, ",grpquota"); | |
649 | #endif | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
115ff50b DK |
654 | #ifdef CONFIG_QUOTA |
655 | ||
656 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
657 | * acquiring the locks... As quota files are never truncated and quota code | |
658 | * itself serializes the operations (and noone else should touch the files) | |
659 | * we don't have to be afraid of races */ | |
660 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
661 | size_t len, loff_t off) | |
662 | { | |
663 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
664 | sector_t blk = off >> sb->s_blocksize_bits; | |
665 | int err = 0; | |
666 | int offset = off & (sb->s_blocksize - 1); | |
667 | int tocopy; | |
668 | size_t toread; | |
669 | struct buffer_head tmp_bh; | |
670 | struct buffer_head *bh; | |
671 | loff_t i_size = i_size_read(inode); | |
672 | ||
673 | if (off > i_size) | |
674 | return 0; | |
675 | if (off+len > i_size) | |
676 | len = i_size-off; | |
677 | toread = len; | |
678 | while (toread > 0) { | |
679 | tocopy = sb->s_blocksize - offset < toread ? | |
680 | sb->s_blocksize - offset : toread; | |
681 | ||
682 | tmp_bh.b_state = 0; | |
683 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
684 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
685 | if (err) | |
686 | return err; | |
687 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
688 | memset(data, 0, tocopy); | |
689 | else { | |
690 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
691 | if (!bh) | |
692 | return -EIO; | |
693 | memcpy(data, bh->b_data+offset, tocopy); | |
694 | brelse(bh); | |
695 | } | |
696 | offset = 0; | |
697 | toread -= tocopy; | |
698 | data += tocopy; | |
699 | blk++; | |
700 | } | |
701 | return len; | |
702 | } | |
703 | ||
704 | /* Write to quotafile */ | |
705 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
706 | const char *data, size_t len, loff_t off) | |
707 | { | |
708 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
709 | sector_t blk = off >> sb->s_blocksize_bits; | |
710 | int err = 0; | |
711 | int offset = off & (sb->s_blocksize - 1); | |
712 | int tocopy; | |
713 | size_t towrite = len; | |
714 | struct buffer_head tmp_bh; | |
715 | struct buffer_head *bh; | |
716 | ||
717 | mutex_lock(&inode->i_mutex); | |
718 | while (towrite > 0) { | |
719 | tocopy = sb->s_blocksize - offset < towrite ? | |
720 | sb->s_blocksize - offset : towrite; | |
721 | ||
722 | tmp_bh.b_state = 0; | |
8bcb2839 | 723 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
724 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
725 | if (err) | |
726 | goto out; | |
727 | if (offset || tocopy != sb->s_blocksize) | |
728 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
729 | else | |
730 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
731 | if (!bh) { | |
732 | err = -EIO; | |
733 | goto out; | |
734 | } | |
735 | lock_buffer(bh); | |
736 | memcpy(bh->b_data+offset, data, tocopy); | |
737 | flush_dcache_page(bh->b_page); | |
738 | set_buffer_uptodate(bh); | |
739 | mark_buffer_dirty(bh); | |
740 | unlock_buffer(bh); | |
741 | brelse(bh); | |
742 | offset = 0; | |
743 | towrite -= tocopy; | |
744 | data += tocopy; | |
745 | blk++; | |
746 | } | |
747 | out: | |
9c83633a DC |
748 | if (len == towrite) { |
749 | mutex_unlock(&inode->i_mutex); | |
115ff50b | 750 | return err; |
9c83633a | 751 | } |
115ff50b DK |
752 | if (inode->i_size < off+len-towrite) |
753 | i_size_write(inode, off+len-towrite); | |
754 | inode->i_version++; | |
755 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
756 | mark_inode_dirty(inode); | |
757 | mutex_unlock(&inode->i_mutex); | |
758 | return len - towrite; | |
759 | } | |
760 | ||
761 | #endif | |
762 | ||
ee9b6d61 | 763 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
764 | .alloc_inode = jfs_alloc_inode, |
765 | .destroy_inode = jfs_destroy_inode, | |
1da177e4 LT |
766 | .dirty_inode = jfs_dirty_inode, |
767 | .write_inode = jfs_write_inode, | |
768 | .delete_inode = jfs_delete_inode, | |
257ba15c | 769 | .clear_inode = jfs_clear_inode, |
1da177e4 LT |
770 | .put_super = jfs_put_super, |
771 | .sync_fs = jfs_sync_fs, | |
c4be0c1d TS |
772 | .freeze_fs = jfs_freeze, |
773 | .unfreeze_fs = jfs_unfreeze, | |
1da177e4 LT |
774 | .statfs = jfs_statfs, |
775 | .remount_fs = jfs_remount, | |
115ff50b DK |
776 | .show_options = jfs_show_options, |
777 | #ifdef CONFIG_QUOTA | |
778 | .quota_read = jfs_quota_read, | |
779 | .quota_write = jfs_quota_write, | |
780 | #endif | |
1da177e4 LT |
781 | }; |
782 | ||
39655164 | 783 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
784 | .fh_to_dentry = jfs_fh_to_dentry, |
785 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
786 | .get_parent = jfs_get_parent, |
787 | }; | |
788 | ||
789 | static struct file_system_type jfs_fs_type = { | |
790 | .owner = THIS_MODULE, | |
791 | .name = "jfs", | |
792 | .get_sb = jfs_get_sb, | |
793 | .kill_sb = kill_block_super, | |
794 | .fs_flags = FS_REQUIRES_DEV, | |
795 | }; | |
796 | ||
51cc5068 | 797 | static void init_once(void *foo) |
1da177e4 LT |
798 | { |
799 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
800 | ||
a35afb83 CL |
801 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
802 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
803 | init_rwsem(&jfs_ip->rdwrlock); | |
804 | mutex_init(&jfs_ip->commit_mutex); | |
805 | init_rwsem(&jfs_ip->xattr_sem); | |
806 | spin_lock_init(&jfs_ip->ag_lock); | |
807 | jfs_ip->active_ag = -1; | |
a35afb83 | 808 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
809 | } |
810 | ||
811 | static int __init init_jfs_fs(void) | |
812 | { | |
813 | int i; | |
814 | int rc; | |
815 | ||
816 | jfs_inode_cachep = | |
63f83c9f | 817 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 818 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 819 | init_once); |
1da177e4 LT |
820 | if (jfs_inode_cachep == NULL) |
821 | return -ENOMEM; | |
822 | ||
823 | /* | |
824 | * Metapage initialization | |
825 | */ | |
826 | rc = metapage_init(); | |
827 | if (rc) { | |
828 | jfs_err("metapage_init failed w/rc = %d", rc); | |
829 | goto free_slab; | |
830 | } | |
831 | ||
832 | /* | |
833 | * Transaction Manager initialization | |
834 | */ | |
835 | rc = txInit(); | |
836 | if (rc) { | |
837 | jfs_err("txInit failed w/rc = %d", rc); | |
838 | goto free_metapage; | |
839 | } | |
840 | ||
841 | /* | |
842 | * I/O completion thread (endio) | |
843 | */ | |
91dbb4de CH |
844 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
845 | if (IS_ERR(jfsIOthread)) { | |
846 | rc = PTR_ERR(jfsIOthread); | |
847 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
848 | goto end_txmngr; |
849 | } | |
1da177e4 LT |
850 | |
851 | if (commit_threads < 1) | |
852 | commit_threads = num_online_cpus(); | |
853 | if (commit_threads > MAX_COMMIT_THREADS) | |
854 | commit_threads = MAX_COMMIT_THREADS; | |
855 | ||
856 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
857 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
858 | if (IS_ERR(jfsCommitThread[i])) { | |
859 | rc = PTR_ERR(jfsCommitThread[i]); | |
860 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
861 | commit_threads = i; |
862 | goto kill_committask; | |
863 | } | |
1da177e4 LT |
864 | } |
865 | ||
91dbb4de CH |
866 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
867 | if (IS_ERR(jfsSyncThread)) { | |
868 | rc = PTR_ERR(jfsSyncThread); | |
869 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
870 | goto kill_committask; |
871 | } | |
1da177e4 LT |
872 | |
873 | #ifdef PROC_FS_JFS | |
874 | jfs_proc_init(); | |
875 | #endif | |
876 | ||
877 | return register_filesystem(&jfs_fs_type); | |
878 | ||
879 | kill_committask: | |
1da177e4 | 880 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
881 | kthread_stop(jfsCommitThread[i]); |
882 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
883 | end_txmngr: |
884 | txExit(); | |
885 | free_metapage: | |
886 | metapage_exit(); | |
887 | free_slab: | |
888 | kmem_cache_destroy(jfs_inode_cachep); | |
889 | return rc; | |
890 | } | |
891 | ||
892 | static void __exit exit_jfs_fs(void) | |
893 | { | |
894 | int i; | |
895 | ||
896 | jfs_info("exit_jfs_fs called"); | |
897 | ||
1da177e4 LT |
898 | txExit(); |
899 | metapage_exit(); | |
91dbb4de CH |
900 | |
901 | kthread_stop(jfsIOthread); | |
1da177e4 | 902 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
903 | kthread_stop(jfsCommitThread[i]); |
904 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
905 | #ifdef PROC_FS_JFS |
906 | jfs_proc_clean(); | |
907 | #endif | |
908 | unregister_filesystem(&jfs_fs_type); | |
909 | kmem_cache_destroy(jfs_inode_cachep); | |
910 | } | |
911 | ||
912 | module_init(init_jfs_fs) | |
913 | module_exit(exit_jfs_fs) |