]>
Commit | Line | Data |
---|---|---|
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> |
1da177e4 LT |
36 | |
37 | #include "jfs_incore.h" | |
38 | #include "jfs_filsys.h" | |
1868f4aa | 39 | #include "jfs_inode.h" |
1da177e4 LT |
40 | #include "jfs_metapage.h" |
41 | #include "jfs_superblock.h" | |
42 | #include "jfs_dmap.h" | |
43 | #include "jfs_imap.h" | |
44 | #include "jfs_acl.h" | |
45 | #include "jfs_debug.h" | |
46 | ||
47 | MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); | |
48 | MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
e18b890b | 51 | static struct kmem_cache * jfs_inode_cachep; |
1da177e4 | 52 | |
ee9b6d61 | 53 | static const struct super_operations jfs_super_operations; |
39655164 | 54 | static const struct export_operations jfs_export_operations; |
1da177e4 LT |
55 | static struct file_system_type jfs_fs_type; |
56 | ||
57 | #define MAX_COMMIT_THREADS 64 | |
58 | static int commit_threads = 0; | |
59 | module_param(commit_threads, int, 0); | |
60 | MODULE_PARM_DESC(commit_threads, "Number of commit threads"); | |
61 | ||
91dbb4de CH |
62 | static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
63 | struct task_struct *jfsIOthread; | |
64 | struct task_struct *jfsSyncThread; | |
1da177e4 LT |
65 | |
66 | #ifdef CONFIG_JFS_DEBUG | |
67 | int jfsloglevel = JFS_LOGLEVEL_WARN; | |
68 | module_param(jfsloglevel, int, 0644); | |
69 | MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); | |
70 | #endif | |
71 | ||
1da177e4 LT |
72 | static void jfs_handle_error(struct super_block *sb) |
73 | { | |
74 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
75 | ||
76 | if (sb->s_flags & MS_RDONLY) | |
77 | return; | |
78 | ||
79 | updateSuper(sb, FM_DIRTY); | |
80 | ||
81 | if (sbi->flag & JFS_ERR_PANIC) | |
82 | panic("JFS (device %s): panic forced after error\n", | |
83 | sb->s_id); | |
84 | else if (sbi->flag & JFS_ERR_REMOUNT_RO) { | |
85 | jfs_err("ERROR: (device %s): remounting filesystem " | |
86 | "as read-only\n", | |
87 | sb->s_id); | |
88 | sb->s_flags |= MS_RDONLY; | |
63f83c9f | 89 | } |
1da177e4 LT |
90 | |
91 | /* nothing is done for continue beyond marking the superblock dirty */ | |
92 | } | |
93 | ||
94 | void jfs_error(struct super_block *sb, const char * function, ...) | |
95 | { | |
96 | static char error_buf[256]; | |
97 | va_list args; | |
98 | ||
99 | va_start(args, function); | |
4a6e617a | 100 | vsnprintf(error_buf, sizeof(error_buf), function, args); |
1da177e4 LT |
101 | va_end(args); |
102 | ||
103 | printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf); | |
104 | ||
105 | jfs_handle_error(sb); | |
106 | } | |
107 | ||
108 | static struct inode *jfs_alloc_inode(struct super_block *sb) | |
109 | { | |
110 | struct jfs_inode_info *jfs_inode; | |
111 | ||
112 | jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS); | |
113 | if (!jfs_inode) | |
114 | return NULL; | |
115 | return &jfs_inode->vfs_inode; | |
116 | } | |
117 | ||
118 | static void jfs_destroy_inode(struct inode *inode) | |
119 | { | |
120 | struct jfs_inode_info *ji = JFS_IP(inode); | |
121 | ||
8a9cd6d6 DK |
122 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
123 | ||
1da177e4 LT |
124 | spin_lock_irq(&ji->ag_lock); |
125 | if (ji->active_ag != -1) { | |
126 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
127 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
128 | ji->active_ag = -1; | |
129 | } | |
130 | spin_unlock_irq(&ji->ag_lock); | |
1da177e4 LT |
131 | kmem_cache_free(jfs_inode_cachep, ji); |
132 | } | |
133 | ||
726c3342 | 134 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 135 | { |
726c3342 | 136 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
137 | s64 maxinodes; |
138 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
139 | ||
140 | jfs_info("In jfs_statfs"); | |
141 | buf->f_type = JFS_SUPER_MAGIC; | |
142 | buf->f_bsize = sbi->bsize; | |
143 | buf->f_blocks = sbi->bmap->db_mapsize; | |
144 | buf->f_bfree = sbi->bmap->db_nfree; | |
145 | buf->f_bavail = sbi->bmap->db_nfree; | |
146 | /* | |
147 | * If we really return the number of allocated & free inodes, some | |
148 | * applications will fail because they won't see enough free inodes. | |
149 | * We'll try to calculate some guess as to how may inodes we can | |
150 | * really allocate | |
151 | * | |
152 | * buf->f_files = atomic_read(&imap->im_numinos); | |
153 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
154 | */ | |
155 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
156 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
157 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
158 | buf->f_files = maxinodes; | |
159 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
160 | atomic_read(&imap->im_numfree)); | |
b5c816a4 CL |
161 | buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); |
162 | buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, | |
163 | sizeof(sbi->uuid)/2); | |
1da177e4 LT |
164 | |
165 | buf->f_namelen = JFS_NAME_MAX; | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static void jfs_put_super(struct super_block *sb) | |
170 | { | |
171 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
172 | int rc; | |
173 | ||
174 | jfs_info("In jfs_put_super"); | |
6cfd0148 | 175 | |
e0ccfd95 CH |
176 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
177 | ||
1da177e4 LT |
178 | rc = jfs_umount(sb); |
179 | if (rc) | |
180 | jfs_err("jfs_umount failed with return code %d", rc); | |
6d729e44 TG |
181 | |
182 | unload_nls(sbi->nls_tab); | |
1da177e4 | 183 | |
7fab479b DK |
184 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
185 | iput(sbi->direct_inode); | |
7fab479b | 186 | |
1da177e4 LT |
187 | kfree(sbi); |
188 | } | |
189 | ||
190 | enum { | |
191 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 192 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
69eb66d7 | 193 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
1da177e4 LT |
194 | }; |
195 | ||
a447c093 | 196 | static const match_table_t tokens = { |
1da177e4 LT |
197 | {Opt_integrity, "integrity"}, |
198 | {Opt_nointegrity, "nointegrity"}, | |
199 | {Opt_iocharset, "iocharset=%s"}, | |
200 | {Opt_resize, "resize=%u"}, | |
201 | {Opt_resize_nosize, "resize"}, | |
202 | {Opt_errors, "errors=%s"}, | |
203 | {Opt_ignore, "noquota"}, | |
204 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
205 | {Opt_usrquota, "usrquota"}, |
206 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
207 | {Opt_uid, "uid=%u"}, |
208 | {Opt_gid, "gid=%u"}, | |
209 | {Opt_umask, "umask=%u"}, | |
1da177e4 LT |
210 | {Opt_err, NULL} |
211 | }; | |
212 | ||
213 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
214 | int *flag) | |
215 | { | |
216 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
217 | char *p; | |
218 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
219 | ||
220 | *newLVSize = 0; | |
221 | ||
222 | if (!options) | |
223 | return 1; | |
224 | ||
225 | while ((p = strsep(&options, ",")) != NULL) { | |
226 | substring_t args[MAX_OPT_ARGS]; | |
227 | int token; | |
228 | if (!*p) | |
229 | continue; | |
230 | ||
231 | token = match_token(p, tokens, args); | |
232 | switch (token) { | |
233 | case Opt_integrity: | |
234 | *flag &= ~JFS_NOINTEGRITY; | |
235 | break; | |
236 | case Opt_nointegrity: | |
237 | *flag |= JFS_NOINTEGRITY; | |
238 | break; | |
239 | case Opt_ignore: | |
240 | /* Silently ignore the quota options */ | |
241 | /* Don't do anything ;-) */ | |
242 | break; | |
243 | case Opt_iocharset: | |
244 | if (nls_map && nls_map != (void *) -1) | |
245 | unload_nls(nls_map); | |
246 | if (!strcmp(args[0].from, "none")) | |
247 | nls_map = NULL; | |
248 | else { | |
249 | nls_map = load_nls(args[0].from); | |
250 | if (!nls_map) { | |
251 | printk(KERN_ERR | |
252 | "JFS: charset not found\n"); | |
253 | goto cleanup; | |
254 | } | |
255 | } | |
256 | break; | |
257 | case Opt_resize: | |
258 | { | |
259 | char *resize = args[0].from; | |
260 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
261 | break; | |
262 | } | |
263 | case Opt_resize_nosize: | |
264 | { | |
265 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
266 | sb->s_blocksize_bits; | |
267 | if (*newLVSize == 0) | |
268 | printk(KERN_ERR | |
269 | "JFS: Cannot determine volume size\n"); | |
270 | break; | |
271 | } | |
272 | case Opt_errors: | |
273 | { | |
274 | char *errors = args[0].from; | |
275 | if (!errors || !*errors) | |
276 | goto cleanup; | |
277 | if (!strcmp(errors, "continue")) { | |
278 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
279 | *flag &= ~JFS_ERR_PANIC; | |
280 | *flag |= JFS_ERR_CONTINUE; | |
281 | } else if (!strcmp(errors, "remount-ro")) { | |
282 | *flag &= ~JFS_ERR_CONTINUE; | |
283 | *flag &= ~JFS_ERR_PANIC; | |
284 | *flag |= JFS_ERR_REMOUNT_RO; | |
285 | } else if (!strcmp(errors, "panic")) { | |
286 | *flag &= ~JFS_ERR_CONTINUE; | |
287 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
288 | *flag |= JFS_ERR_PANIC; | |
289 | } else { | |
290 | printk(KERN_ERR | |
291 | "JFS: %s is an invalid error handler\n", | |
292 | errors); | |
293 | goto cleanup; | |
294 | } | |
295 | break; | |
296 | } | |
8fc2751b | 297 | |
115ff50b | 298 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
299 | case Opt_quota: |
300 | case Opt_usrquota: | |
301 | *flag |= JFS_USRQUOTA; | |
302 | break; | |
303 | case Opt_grpquota: | |
304 | *flag |= JFS_GRPQUOTA; | |
305 | break; | |
306 | #else | |
307 | case Opt_usrquota: | |
308 | case Opt_grpquota: | |
309 | case Opt_quota: | |
310 | printk(KERN_ERR | |
311 | "JFS: quota operations not supported\n"); | |
312 | break; | |
313 | #endif | |
69eb66d7 DK |
314 | case Opt_uid: |
315 | { | |
316 | char *uid = args[0].from; | |
317 | sbi->uid = simple_strtoul(uid, &uid, 0); | |
318 | break; | |
319 | } | |
320 | case Opt_gid: | |
321 | { | |
322 | char *gid = args[0].from; | |
323 | sbi->gid = simple_strtoul(gid, &gid, 0); | |
324 | break; | |
325 | } | |
326 | case Opt_umask: | |
327 | { | |
328 | char *umask = args[0].from; | |
329 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
330 | if (sbi->umask & ~0777) { | |
331 | printk(KERN_ERR | |
332 | "JFS: Invalid value of umask\n"); | |
333 | goto cleanup; | |
334 | } | |
335 | break; | |
336 | } | |
1da177e4 LT |
337 | default: |
338 | printk("jfs: Unrecognized mount option \"%s\" " | |
339 | " or missing value\n", p); | |
340 | goto cleanup; | |
341 | } | |
342 | } | |
343 | ||
344 | if (nls_map != (void *) -1) { | |
345 | /* Discard old (if remount) */ | |
6d729e44 | 346 | unload_nls(sbi->nls_tab); |
1da177e4 LT |
347 | sbi->nls_tab = nls_map; |
348 | } | |
349 | return 1; | |
350 | ||
351 | cleanup: | |
352 | if (nls_map && nls_map != (void *) -1) | |
353 | unload_nls(nls_map); | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
358 | { | |
359 | s64 newLVSize = 0; | |
360 | int rc = 0; | |
361 | int flag = JFS_SBI(sb)->flag; | |
337eb00a | 362 | int ret; |
1da177e4 LT |
363 | |
364 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
365 | return -EINVAL; | |
366 | } | |
22b26db6 | 367 | |
1da177e4 LT |
368 | if (newLVSize) { |
369 | if (sb->s_flags & MS_RDONLY) { | |
370 | printk(KERN_ERR | |
371 | "JFS: resize requires volume to be mounted read-write\n"); | |
372 | return -EROFS; | |
373 | } | |
374 | rc = jfs_extendfs(sb, newLVSize, 0); | |
22b26db6 | 375 | if (rc) |
1da177e4 LT |
376 | return rc; |
377 | } | |
378 | ||
379 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
380 | /* |
381 | * Invalidate any previously read metadata. fsck may have | |
382 | * changed the on-disk data since we mounted r/o | |
383 | */ | |
384 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
385 | ||
1da177e4 | 386 | JFS_SBI(sb)->flag = flag; |
337eb00a | 387 | ret = jfs_mount_rw(sb, 1); |
c79d967d CH |
388 | |
389 | /* mark the fs r/w for quota activity */ | |
390 | sb->s_flags &= ~MS_RDONLY; | |
391 | ||
0f0dd62f | 392 | dquot_resume(sb, -1); |
337eb00a | 393 | return ret; |
1da177e4 LT |
394 | } |
395 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
0f0dd62f CH |
396 | rc = dquot_suspend(sb, -1); |
397 | if (rc < 0) { | |
0f0dd62f | 398 | return rc; |
c79d967d | 399 | } |
1da177e4 LT |
400 | rc = jfs_umount_rw(sb); |
401 | JFS_SBI(sb)->flag = flag; | |
402 | return rc; | |
403 | } | |
404 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
405 | if (!(sb->s_flags & MS_RDONLY)) { | |
406 | rc = jfs_umount_rw(sb); | |
22b26db6 | 407 | if (rc) |
1da177e4 | 408 | return rc; |
22b26db6 | 409 | |
1da177e4 | 410 | JFS_SBI(sb)->flag = flag; |
337eb00a | 411 | ret = jfs_mount_rw(sb, 1); |
337eb00a | 412 | return ret; |
1da177e4 LT |
413 | } |
414 | JFS_SBI(sb)->flag = flag; | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
420 | { | |
421 | struct jfs_sb_info *sbi; | |
422 | struct inode *inode; | |
423 | int rc; | |
424 | s64 newLVSize = 0; | |
eab1df71 | 425 | int flag, ret = -EINVAL; |
1da177e4 LT |
426 | |
427 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
428 | ||
22b26db6 | 429 | if (!new_valid_dev(sb->s_bdev->bd_dev)) |
1da177e4 LT |
430 | return -EOVERFLOW; |
431 | ||
5b3030e3 | 432 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
22b26db6 | 433 | if (!sbi) |
087387f9 | 434 | return -ENOMEM; |
22b26db6 | 435 | |
1da177e4 LT |
436 | sb->s_fs_info = sbi; |
437 | sbi->sb = sb; | |
69eb66d7 | 438 | sbi->uid = sbi->gid = sbi->umask = -1; |
1da177e4 LT |
439 | |
440 | /* initialize the mount flag and determine the default error handler */ | |
441 | flag = JFS_ERR_REMOUNT_RO; | |
442 | ||
684bdc7f JB |
443 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) |
444 | goto out_kfree; | |
1da177e4 LT |
445 | sbi->flag = flag; |
446 | ||
447 | #ifdef CONFIG_JFS_POSIX_ACL | |
448 | sb->s_flags |= MS_POSIXACL; | |
449 | #endif | |
450 | ||
451 | if (newLVSize) { | |
452 | printk(KERN_ERR "resize option for remount only\n"); | |
684bdc7f | 453 | goto out_kfree; |
1da177e4 LT |
454 | } |
455 | ||
456 | /* | |
457 | * Initialize blocksize to 4K. | |
458 | */ | |
459 | sb_set_blocksize(sb, PSIZE); | |
460 | ||
461 | /* | |
462 | * Set method vectors. | |
463 | */ | |
464 | sb->s_op = &jfs_super_operations; | |
465 | sb->s_export_op = &jfs_export_operations; | |
123e9caf CH |
466 | #ifdef CONFIG_QUOTA |
467 | sb->dq_op = &dquot_operations; | |
287a8095 | 468 | sb->s_qcop = &dquot_quotactl_ops; |
123e9caf | 469 | #endif |
1da177e4 | 470 | |
7fab479b DK |
471 | /* |
472 | * Initialize direct-mapping inode/address-space | |
473 | */ | |
474 | inode = new_inode(sb); | |
eab1df71 DH |
475 | if (inode == NULL) { |
476 | ret = -ENOMEM; | |
684bdc7f | 477 | goto out_unload; |
eab1df71 | 478 | } |
7fab479b DK |
479 | inode->i_ino = 0; |
480 | inode->i_nlink = 1; | |
481 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
482 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 483 | insert_inode_hash(inode); |
7fab479b DK |
484 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
485 | ||
486 | sbi->direct_inode = inode; | |
487 | ||
1da177e4 LT |
488 | rc = jfs_mount(sb); |
489 | if (rc) { | |
490 | if (!silent) { | |
491 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
492 | } | |
7fab479b | 493 | goto out_mount_failed; |
1da177e4 LT |
494 | } |
495 | if (sb->s_flags & MS_RDONLY) | |
496 | sbi->log = NULL; | |
497 | else { | |
498 | rc = jfs_mount_rw(sb, 0); | |
499 | if (rc) { | |
500 | if (!silent) { | |
501 | jfs_err("jfs_mount_rw failed, return code = %d", | |
502 | rc); | |
503 | } | |
504 | goto out_no_rw; | |
505 | } | |
506 | } | |
507 | ||
508 | sb->s_magic = JFS_SUPER_MAGIC; | |
509 | ||
eab1df71 DH |
510 | inode = jfs_iget(sb, ROOT_I); |
511 | if (IS_ERR(inode)) { | |
512 | ret = PTR_ERR(inode); | |
6536d289 | 513 | goto out_no_rw; |
eab1df71 | 514 | } |
1da177e4 LT |
515 | sb->s_root = d_alloc_root(inode); |
516 | if (!sb->s_root) | |
517 | goto out_no_root; | |
518 | ||
519 | if (sbi->mntflag & JFS_OS2) | |
520 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
521 | ||
522 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
523 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
524 | #if BITS_PER_LONG == 32 | |
525 | /* | |
526 | * Page cache is indexed by long. | |
527 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
528 | */ | |
28ba0ec6 | 529 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes); |
1da177e4 LT |
530 | #endif |
531 | sb->s_time_gran = 1; | |
532 | return 0; | |
533 | ||
534 | out_no_root: | |
6536d289 DK |
535 | jfs_err("jfs_read_super: get root dentry failed"); |
536 | iput(inode); | |
1da177e4 LT |
537 | |
538 | out_no_rw: | |
539 | rc = jfs_umount(sb); | |
540 | if (rc) { | |
541 | jfs_err("jfs_umount failed with return code %d", rc); | |
542 | } | |
7fab479b | 543 | out_mount_failed: |
28fd1298 | 544 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
545 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
546 | make_bad_inode(sbi->direct_inode); | |
547 | iput(sbi->direct_inode); | |
548 | sbi->direct_inode = NULL; | |
684bdc7f | 549 | out_unload: |
1da177e4 LT |
550 | if (sbi->nls_tab) |
551 | unload_nls(sbi->nls_tab); | |
684bdc7f | 552 | out_kfree: |
1da177e4 | 553 | kfree(sbi); |
eab1df71 | 554 | return ret; |
1da177e4 LT |
555 | } |
556 | ||
c4be0c1d | 557 | static int jfs_freeze(struct super_block *sb) |
1da177e4 LT |
558 | { |
559 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
560 | struct jfs_log *log = sbi->log; | |
561 | ||
562 | if (!(sb->s_flags & MS_RDONLY)) { | |
563 | txQuiesce(sb); | |
564 | lmLogShutdown(log); | |
565 | updateSuper(sb, FM_CLEAN); | |
566 | } | |
c4be0c1d | 567 | return 0; |
1da177e4 LT |
568 | } |
569 | ||
c4be0c1d | 570 | static int jfs_unfreeze(struct super_block *sb) |
1da177e4 LT |
571 | { |
572 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
573 | struct jfs_log *log = sbi->log; | |
574 | int rc = 0; | |
575 | ||
576 | if (!(sb->s_flags & MS_RDONLY)) { | |
577 | updateSuper(sb, FM_MOUNT); | |
578 | if ((rc = lmLogInit(log))) | |
579 | jfs_err("jfs_unlock failed with return code %d", rc); | |
580 | else | |
581 | txResume(sb); | |
582 | } | |
c4be0c1d | 583 | return 0; |
1da177e4 LT |
584 | } |
585 | ||
152a0836 AV |
586 | static struct dentry *jfs_do_mount(struct file_system_type *fs_type, |
587 | int flags, const char *dev_name, void *data) | |
1da177e4 | 588 | { |
152a0836 | 589 | return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super); |
1da177e4 LT |
590 | } |
591 | ||
592 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
593 | { | |
594 | struct jfs_log *log = JFS_SBI(sb)->log; | |
595 | ||
596 | /* log == NULL indicates read-only mount */ | |
1c627829 | 597 | if (log) { |
1da177e4 | 598 | jfs_flush_journal(log, wait); |
cbc3d65e | 599 | jfs_syncpt(log, 0); |
1c627829 | 600 | } |
1da177e4 LT |
601 | |
602 | return 0; | |
603 | } | |
604 | ||
8fc2751b MB |
605 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
606 | { | |
607 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
608 | ||
69eb66d7 DK |
609 | if (sbi->uid != -1) |
610 | seq_printf(seq, ",uid=%d", sbi->uid); | |
611 | if (sbi->gid != -1) | |
612 | seq_printf(seq, ",gid=%d", sbi->gid); | |
613 | if (sbi->umask != -1) | |
614 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
615 | if (sbi->flag & JFS_NOINTEGRITY) |
616 | seq_puts(seq, ",nointegrity"); | |
5c5e32ce MS |
617 | if (sbi->nls_tab) |
618 | seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); | |
619 | if (sbi->flag & JFS_ERR_CONTINUE) | |
620 | seq_printf(seq, ",errors=continue"); | |
621 | if (sbi->flag & JFS_ERR_PANIC) | |
622 | seq_printf(seq, ",errors=panic"); | |
8fc2751b | 623 | |
115ff50b | 624 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
625 | if (sbi->flag & JFS_USRQUOTA) |
626 | seq_puts(seq, ",usrquota"); | |
627 | ||
628 | if (sbi->flag & JFS_GRPQUOTA) | |
629 | seq_puts(seq, ",grpquota"); | |
630 | #endif | |
631 | ||
632 | return 0; | |
633 | } | |
634 | ||
115ff50b DK |
635 | #ifdef CONFIG_QUOTA |
636 | ||
637 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
638 | * acquiring the locks... As quota files are never truncated and quota code | |
639 | * itself serializes the operations (and noone else should touch the files) | |
640 | * we don't have to be afraid of races */ | |
641 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
642 | size_t len, loff_t off) | |
643 | { | |
644 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
645 | sector_t blk = off >> sb->s_blocksize_bits; | |
646 | int err = 0; | |
647 | int offset = off & (sb->s_blocksize - 1); | |
648 | int tocopy; | |
649 | size_t toread; | |
650 | struct buffer_head tmp_bh; | |
651 | struct buffer_head *bh; | |
652 | loff_t i_size = i_size_read(inode); | |
653 | ||
654 | if (off > i_size) | |
655 | return 0; | |
656 | if (off+len > i_size) | |
657 | len = i_size-off; | |
658 | toread = len; | |
659 | while (toread > 0) { | |
660 | tocopy = sb->s_blocksize - offset < toread ? | |
661 | sb->s_blocksize - offset : toread; | |
662 | ||
663 | tmp_bh.b_state = 0; | |
664 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
665 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
666 | if (err) | |
667 | return err; | |
668 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
669 | memset(data, 0, tocopy); | |
670 | else { | |
671 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
672 | if (!bh) | |
673 | return -EIO; | |
674 | memcpy(data, bh->b_data+offset, tocopy); | |
675 | brelse(bh); | |
676 | } | |
677 | offset = 0; | |
678 | toread -= tocopy; | |
679 | data += tocopy; | |
680 | blk++; | |
681 | } | |
682 | return len; | |
683 | } | |
684 | ||
685 | /* Write to quotafile */ | |
686 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
687 | const char *data, size_t len, loff_t off) | |
688 | { | |
689 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
690 | sector_t blk = off >> sb->s_blocksize_bits; | |
691 | int err = 0; | |
692 | int offset = off & (sb->s_blocksize - 1); | |
693 | int tocopy; | |
694 | size_t towrite = len; | |
695 | struct buffer_head tmp_bh; | |
696 | struct buffer_head *bh; | |
697 | ||
698 | mutex_lock(&inode->i_mutex); | |
699 | while (towrite > 0) { | |
700 | tocopy = sb->s_blocksize - offset < towrite ? | |
701 | sb->s_blocksize - offset : towrite; | |
702 | ||
703 | tmp_bh.b_state = 0; | |
8bcb2839 | 704 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
705 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
706 | if (err) | |
707 | goto out; | |
708 | if (offset || tocopy != sb->s_blocksize) | |
709 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
710 | else | |
711 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
712 | if (!bh) { | |
713 | err = -EIO; | |
714 | goto out; | |
715 | } | |
716 | lock_buffer(bh); | |
717 | memcpy(bh->b_data+offset, data, tocopy); | |
718 | flush_dcache_page(bh->b_page); | |
719 | set_buffer_uptodate(bh); | |
720 | mark_buffer_dirty(bh); | |
721 | unlock_buffer(bh); | |
722 | brelse(bh); | |
723 | offset = 0; | |
724 | towrite -= tocopy; | |
725 | data += tocopy; | |
726 | blk++; | |
727 | } | |
728 | out: | |
9c83633a DC |
729 | if (len == towrite) { |
730 | mutex_unlock(&inode->i_mutex); | |
115ff50b | 731 | return err; |
9c83633a | 732 | } |
115ff50b DK |
733 | if (inode->i_size < off+len-towrite) |
734 | i_size_write(inode, off+len-towrite); | |
735 | inode->i_version++; | |
736 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
737 | mark_inode_dirty(inode); | |
738 | mutex_unlock(&inode->i_mutex); | |
739 | return len - towrite; | |
740 | } | |
741 | ||
742 | #endif | |
743 | ||
ee9b6d61 | 744 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
745 | .alloc_inode = jfs_alloc_inode, |
746 | .destroy_inode = jfs_destroy_inode, | |
1da177e4 LT |
747 | .dirty_inode = jfs_dirty_inode, |
748 | .write_inode = jfs_write_inode, | |
62aff86f | 749 | .evict_inode = jfs_evict_inode, |
1da177e4 LT |
750 | .put_super = jfs_put_super, |
751 | .sync_fs = jfs_sync_fs, | |
c4be0c1d TS |
752 | .freeze_fs = jfs_freeze, |
753 | .unfreeze_fs = jfs_unfreeze, | |
1da177e4 LT |
754 | .statfs = jfs_statfs, |
755 | .remount_fs = jfs_remount, | |
115ff50b DK |
756 | .show_options = jfs_show_options, |
757 | #ifdef CONFIG_QUOTA | |
758 | .quota_read = jfs_quota_read, | |
759 | .quota_write = jfs_quota_write, | |
760 | #endif | |
1da177e4 LT |
761 | }; |
762 | ||
39655164 | 763 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
764 | .fh_to_dentry = jfs_fh_to_dentry, |
765 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
766 | .get_parent = jfs_get_parent, |
767 | }; | |
768 | ||
769 | static struct file_system_type jfs_fs_type = { | |
770 | .owner = THIS_MODULE, | |
771 | .name = "jfs", | |
152a0836 | 772 | .mount = jfs_do_mount, |
1da177e4 LT |
773 | .kill_sb = kill_block_super, |
774 | .fs_flags = FS_REQUIRES_DEV, | |
775 | }; | |
776 | ||
51cc5068 | 777 | static void init_once(void *foo) |
1da177e4 LT |
778 | { |
779 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
780 | ||
a35afb83 CL |
781 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
782 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
783 | init_rwsem(&jfs_ip->rdwrlock); | |
784 | mutex_init(&jfs_ip->commit_mutex); | |
785 | init_rwsem(&jfs_ip->xattr_sem); | |
786 | spin_lock_init(&jfs_ip->ag_lock); | |
787 | jfs_ip->active_ag = -1; | |
a35afb83 | 788 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
789 | } |
790 | ||
791 | static int __init init_jfs_fs(void) | |
792 | { | |
793 | int i; | |
794 | int rc; | |
795 | ||
796 | jfs_inode_cachep = | |
63f83c9f | 797 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 798 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 799 | init_once); |
1da177e4 LT |
800 | if (jfs_inode_cachep == NULL) |
801 | return -ENOMEM; | |
802 | ||
803 | /* | |
804 | * Metapage initialization | |
805 | */ | |
806 | rc = metapage_init(); | |
807 | if (rc) { | |
808 | jfs_err("metapage_init failed w/rc = %d", rc); | |
809 | goto free_slab; | |
810 | } | |
811 | ||
812 | /* | |
813 | * Transaction Manager initialization | |
814 | */ | |
815 | rc = txInit(); | |
816 | if (rc) { | |
817 | jfs_err("txInit failed w/rc = %d", rc); | |
818 | goto free_metapage; | |
819 | } | |
820 | ||
821 | /* | |
822 | * I/O completion thread (endio) | |
823 | */ | |
91dbb4de CH |
824 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
825 | if (IS_ERR(jfsIOthread)) { | |
826 | rc = PTR_ERR(jfsIOthread); | |
827 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
828 | goto end_txmngr; |
829 | } | |
1da177e4 LT |
830 | |
831 | if (commit_threads < 1) | |
832 | commit_threads = num_online_cpus(); | |
833 | if (commit_threads > MAX_COMMIT_THREADS) | |
834 | commit_threads = MAX_COMMIT_THREADS; | |
835 | ||
836 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
837 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
838 | if (IS_ERR(jfsCommitThread[i])) { | |
839 | rc = PTR_ERR(jfsCommitThread[i]); | |
840 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
841 | commit_threads = i; |
842 | goto kill_committask; | |
843 | } | |
1da177e4 LT |
844 | } |
845 | ||
91dbb4de CH |
846 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
847 | if (IS_ERR(jfsSyncThread)) { | |
848 | rc = PTR_ERR(jfsSyncThread); | |
849 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
850 | goto kill_committask; |
851 | } | |
1da177e4 LT |
852 | |
853 | #ifdef PROC_FS_JFS | |
854 | jfs_proc_init(); | |
855 | #endif | |
856 | ||
857 | return register_filesystem(&jfs_fs_type); | |
858 | ||
859 | kill_committask: | |
1da177e4 | 860 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
861 | kthread_stop(jfsCommitThread[i]); |
862 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
863 | end_txmngr: |
864 | txExit(); | |
865 | free_metapage: | |
866 | metapage_exit(); | |
867 | free_slab: | |
868 | kmem_cache_destroy(jfs_inode_cachep); | |
869 | return rc; | |
870 | } | |
871 | ||
872 | static void __exit exit_jfs_fs(void) | |
873 | { | |
874 | int i; | |
875 | ||
876 | jfs_info("exit_jfs_fs called"); | |
877 | ||
1da177e4 LT |
878 | txExit(); |
879 | metapage_exit(); | |
91dbb4de CH |
880 | |
881 | kthread_stop(jfsIOthread); | |
1da177e4 | 882 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
883 | kthread_stop(jfsCommitThread[i]); |
884 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
885 | #ifdef PROC_FS_JFS |
886 | jfs_proc_clean(); | |
887 | #endif | |
888 | unregister_filesystem(&jfs_fs_type); | |
889 | kmem_cache_destroy(jfs_inode_cachep); | |
890 | } | |
891 | ||
892 | module_init(init_jfs_fs) | |
893 | module_exit(exit_jfs_fs) |