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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> |
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 | ||
fa0d7e3d NP |
118 | static void jfs_i_callback(struct rcu_head *head) |
119 | { | |
120 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
121 | struct jfs_inode_info *ji = JFS_IP(inode); | |
fa0d7e3d NP |
122 | kmem_cache_free(jfs_inode_cachep, ji); |
123 | } | |
124 | ||
1da177e4 LT |
125 | static void jfs_destroy_inode(struct inode *inode) |
126 | { | |
127 | struct jfs_inode_info *ji = JFS_IP(inode); | |
128 | ||
8a9cd6d6 DK |
129 | BUG_ON(!list_empty(&ji->anon_inode_list)); |
130 | ||
1da177e4 LT |
131 | spin_lock_irq(&ji->ag_lock); |
132 | if (ji->active_ag != -1) { | |
133 | struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap; | |
134 | atomic_dec(&bmap->db_active[ji->active_ag]); | |
135 | ji->active_ag = -1; | |
136 | } | |
137 | spin_unlock_irq(&ji->ag_lock); | |
fa0d7e3d | 138 | call_rcu(&inode->i_rcu, jfs_i_callback); |
1da177e4 LT |
139 | } |
140 | ||
726c3342 | 141 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 142 | { |
726c3342 | 143 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
144 | s64 maxinodes; |
145 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
146 | ||
147 | jfs_info("In jfs_statfs"); | |
148 | buf->f_type = JFS_SUPER_MAGIC; | |
149 | buf->f_bsize = sbi->bsize; | |
150 | buf->f_blocks = sbi->bmap->db_mapsize; | |
151 | buf->f_bfree = sbi->bmap->db_nfree; | |
152 | buf->f_bavail = sbi->bmap->db_nfree; | |
153 | /* | |
154 | * If we really return the number of allocated & free inodes, some | |
155 | * applications will fail because they won't see enough free inodes. | |
156 | * We'll try to calculate some guess as to how may inodes we can | |
157 | * really allocate | |
158 | * | |
159 | * buf->f_files = atomic_read(&imap->im_numinos); | |
160 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
161 | */ | |
162 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
163 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
164 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
165 | buf->f_files = maxinodes; | |
166 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
167 | atomic_read(&imap->im_numfree)); | |
b5c816a4 CL |
168 | buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); |
169 | buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, | |
170 | sizeof(sbi->uuid)/2); | |
1da177e4 LT |
171 | |
172 | buf->f_namelen = JFS_NAME_MAX; | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static void jfs_put_super(struct super_block *sb) | |
177 | { | |
178 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
179 | int rc; | |
180 | ||
181 | jfs_info("In jfs_put_super"); | |
6cfd0148 | 182 | |
e0ccfd95 CH |
183 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
184 | ||
1da177e4 LT |
185 | rc = jfs_umount(sb); |
186 | if (rc) | |
187 | jfs_err("jfs_umount failed with return code %d", rc); | |
6d729e44 TG |
188 | |
189 | unload_nls(sbi->nls_tab); | |
1da177e4 | 190 | |
7fab479b DK |
191 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
192 | iput(sbi->direct_inode); | |
7fab479b | 193 | |
1da177e4 LT |
194 | kfree(sbi); |
195 | } | |
196 | ||
197 | enum { | |
198 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 199 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
69eb66d7 | 200 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
1da177e4 LT |
201 | }; |
202 | ||
a447c093 | 203 | static const match_table_t tokens = { |
1da177e4 LT |
204 | {Opt_integrity, "integrity"}, |
205 | {Opt_nointegrity, "nointegrity"}, | |
206 | {Opt_iocharset, "iocharset=%s"}, | |
207 | {Opt_resize, "resize=%u"}, | |
208 | {Opt_resize_nosize, "resize"}, | |
209 | {Opt_errors, "errors=%s"}, | |
210 | {Opt_ignore, "noquota"}, | |
211 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
212 | {Opt_usrquota, "usrquota"}, |
213 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
214 | {Opt_uid, "uid=%u"}, |
215 | {Opt_gid, "gid=%u"}, | |
216 | {Opt_umask, "umask=%u"}, | |
1da177e4 LT |
217 | {Opt_err, NULL} |
218 | }; | |
219 | ||
220 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
221 | int *flag) | |
222 | { | |
223 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
224 | char *p; | |
225 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
226 | ||
227 | *newLVSize = 0; | |
228 | ||
229 | if (!options) | |
230 | return 1; | |
231 | ||
232 | while ((p = strsep(&options, ",")) != NULL) { | |
233 | substring_t args[MAX_OPT_ARGS]; | |
234 | int token; | |
235 | if (!*p) | |
236 | continue; | |
237 | ||
238 | token = match_token(p, tokens, args); | |
239 | switch (token) { | |
240 | case Opt_integrity: | |
241 | *flag &= ~JFS_NOINTEGRITY; | |
242 | break; | |
243 | case Opt_nointegrity: | |
244 | *flag |= JFS_NOINTEGRITY; | |
245 | break; | |
246 | case Opt_ignore: | |
247 | /* Silently ignore the quota options */ | |
248 | /* Don't do anything ;-) */ | |
249 | break; | |
250 | case Opt_iocharset: | |
251 | if (nls_map && nls_map != (void *) -1) | |
252 | unload_nls(nls_map); | |
253 | if (!strcmp(args[0].from, "none")) | |
254 | nls_map = NULL; | |
255 | else { | |
256 | nls_map = load_nls(args[0].from); | |
257 | if (!nls_map) { | |
258 | printk(KERN_ERR | |
259 | "JFS: charset not found\n"); | |
260 | goto cleanup; | |
261 | } | |
262 | } | |
263 | break; | |
264 | case Opt_resize: | |
265 | { | |
266 | char *resize = args[0].from; | |
267 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
268 | break; | |
269 | } | |
270 | case Opt_resize_nosize: | |
271 | { | |
272 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
273 | sb->s_blocksize_bits; | |
274 | if (*newLVSize == 0) | |
275 | printk(KERN_ERR | |
276 | "JFS: Cannot determine volume size\n"); | |
277 | break; | |
278 | } | |
279 | case Opt_errors: | |
280 | { | |
281 | char *errors = args[0].from; | |
282 | if (!errors || !*errors) | |
283 | goto cleanup; | |
284 | if (!strcmp(errors, "continue")) { | |
285 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
286 | *flag &= ~JFS_ERR_PANIC; | |
287 | *flag |= JFS_ERR_CONTINUE; | |
288 | } else if (!strcmp(errors, "remount-ro")) { | |
289 | *flag &= ~JFS_ERR_CONTINUE; | |
290 | *flag &= ~JFS_ERR_PANIC; | |
291 | *flag |= JFS_ERR_REMOUNT_RO; | |
292 | } else if (!strcmp(errors, "panic")) { | |
293 | *flag &= ~JFS_ERR_CONTINUE; | |
294 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
295 | *flag |= JFS_ERR_PANIC; | |
296 | } else { | |
297 | printk(KERN_ERR | |
298 | "JFS: %s is an invalid error handler\n", | |
299 | errors); | |
300 | goto cleanup; | |
301 | } | |
302 | break; | |
303 | } | |
8fc2751b | 304 | |
115ff50b | 305 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
306 | case Opt_quota: |
307 | case Opt_usrquota: | |
308 | *flag |= JFS_USRQUOTA; | |
309 | break; | |
310 | case Opt_grpquota: | |
311 | *flag |= JFS_GRPQUOTA; | |
312 | break; | |
313 | #else | |
314 | case Opt_usrquota: | |
315 | case Opt_grpquota: | |
316 | case Opt_quota: | |
317 | printk(KERN_ERR | |
318 | "JFS: quota operations not supported\n"); | |
319 | break; | |
320 | #endif | |
69eb66d7 DK |
321 | case Opt_uid: |
322 | { | |
323 | char *uid = args[0].from; | |
c18cdc1a EB |
324 | uid_t val = simple_strtoul(uid, &uid, 0); |
325 | sbi->uid = make_kuid(current_user_ns(), val); | |
326 | if (!uid_valid(sbi->uid)) | |
327 | goto cleanup; | |
69eb66d7 DK |
328 | break; |
329 | } | |
330 | case Opt_gid: | |
331 | { | |
332 | char *gid = args[0].from; | |
c18cdc1a EB |
333 | gid_t val = simple_strtoul(gid, &gid, 0); |
334 | sbi->gid = make_kgid(current_user_ns(), val); | |
335 | if (!gid_valid(sbi->gid)) | |
336 | goto cleanup; | |
69eb66d7 DK |
337 | break; |
338 | } | |
339 | case Opt_umask: | |
340 | { | |
341 | char *umask = args[0].from; | |
342 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
343 | if (sbi->umask & ~0777) { | |
344 | printk(KERN_ERR | |
345 | "JFS: Invalid value of umask\n"); | |
346 | goto cleanup; | |
347 | } | |
348 | break; | |
349 | } | |
1da177e4 LT |
350 | default: |
351 | printk("jfs: Unrecognized mount option \"%s\" " | |
352 | " or missing value\n", p); | |
353 | goto cleanup; | |
354 | } | |
355 | } | |
356 | ||
357 | if (nls_map != (void *) -1) { | |
358 | /* Discard old (if remount) */ | |
6d729e44 | 359 | unload_nls(sbi->nls_tab); |
1da177e4 LT |
360 | sbi->nls_tab = nls_map; |
361 | } | |
362 | return 1; | |
363 | ||
364 | cleanup: | |
365 | if (nls_map && nls_map != (void *) -1) | |
366 | unload_nls(nls_map); | |
367 | return 0; | |
368 | } | |
369 | ||
370 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
371 | { | |
372 | s64 newLVSize = 0; | |
373 | int rc = 0; | |
374 | int flag = JFS_SBI(sb)->flag; | |
337eb00a | 375 | int ret; |
1da177e4 LT |
376 | |
377 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
378 | return -EINVAL; | |
379 | } | |
22b26db6 | 380 | |
1da177e4 LT |
381 | if (newLVSize) { |
382 | if (sb->s_flags & MS_RDONLY) { | |
383 | printk(KERN_ERR | |
384 | "JFS: resize requires volume to be mounted read-write\n"); | |
385 | return -EROFS; | |
386 | } | |
387 | rc = jfs_extendfs(sb, newLVSize, 0); | |
22b26db6 | 388 | if (rc) |
1da177e4 LT |
389 | return rc; |
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 | ||
0f0dd62f | 405 | dquot_resume(sb, -1); |
337eb00a | 406 | return ret; |
1da177e4 LT |
407 | } |
408 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
0f0dd62f CH |
409 | rc = dquot_suspend(sb, -1); |
410 | if (rc < 0) { | |
0f0dd62f | 411 | return rc; |
c79d967d | 412 | } |
1da177e4 LT |
413 | rc = jfs_umount_rw(sb); |
414 | JFS_SBI(sb)->flag = flag; | |
415 | return rc; | |
416 | } | |
417 | if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) | |
418 | if (!(sb->s_flags & MS_RDONLY)) { | |
419 | rc = jfs_umount_rw(sb); | |
22b26db6 | 420 | if (rc) |
1da177e4 | 421 | return rc; |
22b26db6 | 422 | |
1da177e4 | 423 | JFS_SBI(sb)->flag = flag; |
337eb00a | 424 | ret = jfs_mount_rw(sb, 1); |
337eb00a | 425 | return ret; |
1da177e4 LT |
426 | } |
427 | JFS_SBI(sb)->flag = flag; | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
432 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
433 | { | |
434 | struct jfs_sb_info *sbi; | |
435 | struct inode *inode; | |
436 | int rc; | |
437 | s64 newLVSize = 0; | |
eab1df71 | 438 | int flag, ret = -EINVAL; |
1da177e4 LT |
439 | |
440 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
441 | ||
22b26db6 | 442 | if (!new_valid_dev(sb->s_bdev->bd_dev)) |
1da177e4 LT |
443 | return -EOVERFLOW; |
444 | ||
5b3030e3 | 445 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
22b26db6 | 446 | if (!sbi) |
087387f9 | 447 | return -ENOMEM; |
22b26db6 | 448 | |
1da177e4 | 449 | sb->s_fs_info = sbi; |
8de52778 | 450 | sb->s_max_links = JFS_LINK_MAX; |
1da177e4 | 451 | sbi->sb = sb; |
c18cdc1a EB |
452 | sbi->uid = INVALID_UID; |
453 | sbi->gid = INVALID_GID; | |
454 | sbi->umask = -1; | |
1da177e4 LT |
455 | |
456 | /* initialize the mount flag and determine the default error handler */ | |
457 | flag = JFS_ERR_REMOUNT_RO; | |
458 | ||
684bdc7f JB |
459 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) |
460 | goto out_kfree; | |
1da177e4 LT |
461 | sbi->flag = flag; |
462 | ||
463 | #ifdef CONFIG_JFS_POSIX_ACL | |
464 | sb->s_flags |= MS_POSIXACL; | |
465 | #endif | |
466 | ||
467 | if (newLVSize) { | |
468 | printk(KERN_ERR "resize option for remount only\n"); | |
684bdc7f | 469 | goto out_kfree; |
1da177e4 LT |
470 | } |
471 | ||
472 | /* | |
473 | * Initialize blocksize to 4K. | |
474 | */ | |
475 | sb_set_blocksize(sb, PSIZE); | |
476 | ||
477 | /* | |
478 | * Set method vectors. | |
479 | */ | |
480 | sb->s_op = &jfs_super_operations; | |
481 | sb->s_export_op = &jfs_export_operations; | |
123e9caf CH |
482 | #ifdef CONFIG_QUOTA |
483 | sb->dq_op = &dquot_operations; | |
287a8095 | 484 | sb->s_qcop = &dquot_quotactl_ops; |
123e9caf | 485 | #endif |
1da177e4 | 486 | |
7fab479b DK |
487 | /* |
488 | * Initialize direct-mapping inode/address-space | |
489 | */ | |
490 | inode = new_inode(sb); | |
eab1df71 DH |
491 | if (inode == NULL) { |
492 | ret = -ENOMEM; | |
684bdc7f | 493 | goto out_unload; |
eab1df71 | 494 | } |
7fab479b | 495 | inode->i_ino = 0; |
7fab479b DK |
496 | inode->i_size = sb->s_bdev->bd_inode->i_size; |
497 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 498 | insert_inode_hash(inode); |
7fab479b DK |
499 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
500 | ||
501 | sbi->direct_inode = inode; | |
502 | ||
1da177e4 LT |
503 | rc = jfs_mount(sb); |
504 | if (rc) { | |
505 | if (!silent) { | |
506 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
507 | } | |
7fab479b | 508 | goto out_mount_failed; |
1da177e4 LT |
509 | } |
510 | if (sb->s_flags & MS_RDONLY) | |
511 | sbi->log = NULL; | |
512 | else { | |
513 | rc = jfs_mount_rw(sb, 0); | |
514 | if (rc) { | |
515 | if (!silent) { | |
516 | jfs_err("jfs_mount_rw failed, return code = %d", | |
517 | rc); | |
518 | } | |
519 | goto out_no_rw; | |
520 | } | |
521 | } | |
522 | ||
523 | sb->s_magic = JFS_SUPER_MAGIC; | |
524 | ||
94b77bd8 AV |
525 | if (sbi->mntflag & JFS_OS2) |
526 | sb->s_d_op = &jfs_ci_dentry_operations; | |
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 | } |
48fde701 | 533 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
534 | if (!sb->s_root) |
535 | goto out_no_root; | |
536 | ||
1da177e4 LT |
537 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ |
538 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
539 | #if BITS_PER_LONG == 32 | |
540 | /* | |
541 | * Page cache is indexed by long. | |
542 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
543 | */ | |
28ba0ec6 | 544 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes); |
1da177e4 LT |
545 | #endif |
546 | sb->s_time_gran = 1; | |
547 | return 0; | |
548 | ||
549 | out_no_root: | |
6536d289 | 550 | jfs_err("jfs_read_super: get root dentry failed"); |
1da177e4 LT |
551 | |
552 | out_no_rw: | |
553 | rc = jfs_umount(sb); | |
554 | if (rc) { | |
555 | jfs_err("jfs_umount failed with return code %d", rc); | |
556 | } | |
7fab479b | 557 | out_mount_failed: |
28fd1298 | 558 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
559 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
560 | make_bad_inode(sbi->direct_inode); | |
561 | iput(sbi->direct_inode); | |
562 | sbi->direct_inode = NULL; | |
684bdc7f | 563 | out_unload: |
1da177e4 LT |
564 | if (sbi->nls_tab) |
565 | unload_nls(sbi->nls_tab); | |
684bdc7f | 566 | out_kfree: |
1da177e4 | 567 | kfree(sbi); |
eab1df71 | 568 | return ret; |
1da177e4 LT |
569 | } |
570 | ||
c4be0c1d | 571 | static int jfs_freeze(struct super_block *sb) |
1da177e4 LT |
572 | { |
573 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
574 | struct jfs_log *log = sbi->log; | |
575 | ||
576 | if (!(sb->s_flags & MS_RDONLY)) { | |
577 | txQuiesce(sb); | |
578 | lmLogShutdown(log); | |
579 | updateSuper(sb, FM_CLEAN); | |
580 | } | |
c4be0c1d | 581 | return 0; |
1da177e4 LT |
582 | } |
583 | ||
c4be0c1d | 584 | static int jfs_unfreeze(struct super_block *sb) |
1da177e4 LT |
585 | { |
586 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
587 | struct jfs_log *log = sbi->log; | |
588 | int rc = 0; | |
589 | ||
590 | if (!(sb->s_flags & MS_RDONLY)) { | |
591 | updateSuper(sb, FM_MOUNT); | |
592 | if ((rc = lmLogInit(log))) | |
593 | jfs_err("jfs_unlock failed with return code %d", rc); | |
594 | else | |
595 | txResume(sb); | |
596 | } | |
c4be0c1d | 597 | return 0; |
1da177e4 LT |
598 | } |
599 | ||
152a0836 AV |
600 | static struct dentry *jfs_do_mount(struct file_system_type *fs_type, |
601 | int flags, const char *dev_name, void *data) | |
1da177e4 | 602 | { |
152a0836 | 603 | return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super); |
1da177e4 LT |
604 | } |
605 | ||
606 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
607 | { | |
608 | struct jfs_log *log = JFS_SBI(sb)->log; | |
609 | ||
610 | /* log == NULL indicates read-only mount */ | |
1c627829 | 611 | if (log) { |
a1177825 JK |
612 | /* |
613 | * Write quota structures to quota file, sync_blockdev() will | |
614 | * write them to disk later | |
615 | */ | |
616 | dquot_writeback_dquots(sb, -1); | |
1da177e4 | 617 | jfs_flush_journal(log, wait); |
cbc3d65e | 618 | jfs_syncpt(log, 0); |
1c627829 | 619 | } |
1da177e4 LT |
620 | |
621 | return 0; | |
622 | } | |
623 | ||
34c80b1d | 624 | static int jfs_show_options(struct seq_file *seq, struct dentry *root) |
8fc2751b | 625 | { |
34c80b1d | 626 | struct jfs_sb_info *sbi = JFS_SBI(root->d_sb); |
8fc2751b | 627 | |
c18cdc1a EB |
628 | if (uid_valid(sbi->uid)) |
629 | seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid)); | |
630 | if (gid_valid(sbi->gid)) | |
631 | seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid)); | |
69eb66d7 DK |
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 | |
25985edc | 658 | * itself serializes the operations (and no one else should touch the files) |
115ff50b DK |
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, | |
62aff86f | 768 | .evict_inode = jfs_evict_inode, |
1da177e4 LT |
769 | .put_super = jfs_put_super, |
770 | .sync_fs = jfs_sync_fs, | |
c4be0c1d TS |
771 | .freeze_fs = jfs_freeze, |
772 | .unfreeze_fs = jfs_unfreeze, | |
1da177e4 LT |
773 | .statfs = jfs_statfs, |
774 | .remount_fs = jfs_remount, | |
115ff50b DK |
775 | .show_options = jfs_show_options, |
776 | #ifdef CONFIG_QUOTA | |
777 | .quota_read = jfs_quota_read, | |
778 | .quota_write = jfs_quota_write, | |
779 | #endif | |
1da177e4 LT |
780 | }; |
781 | ||
39655164 | 782 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
783 | .fh_to_dentry = jfs_fh_to_dentry, |
784 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
785 | .get_parent = jfs_get_parent, |
786 | }; | |
787 | ||
788 | static struct file_system_type jfs_fs_type = { | |
789 | .owner = THIS_MODULE, | |
790 | .name = "jfs", | |
152a0836 | 791 | .mount = jfs_do_mount, |
1da177e4 LT |
792 | .kill_sb = kill_block_super, |
793 | .fs_flags = FS_REQUIRES_DEV, | |
794 | }; | |
795 | ||
51cc5068 | 796 | static void init_once(void *foo) |
1da177e4 LT |
797 | { |
798 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
799 | ||
a35afb83 CL |
800 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
801 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
802 | init_rwsem(&jfs_ip->rdwrlock); | |
803 | mutex_init(&jfs_ip->commit_mutex); | |
804 | init_rwsem(&jfs_ip->xattr_sem); | |
805 | spin_lock_init(&jfs_ip->ag_lock); | |
806 | jfs_ip->active_ag = -1; | |
a35afb83 | 807 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
808 | } |
809 | ||
810 | static int __init init_jfs_fs(void) | |
811 | { | |
812 | int i; | |
813 | int rc; | |
814 | ||
815 | jfs_inode_cachep = | |
63f83c9f | 816 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 817 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 818 | init_once); |
1da177e4 LT |
819 | if (jfs_inode_cachep == NULL) |
820 | return -ENOMEM; | |
821 | ||
822 | /* | |
823 | * Metapage initialization | |
824 | */ | |
825 | rc = metapage_init(); | |
826 | if (rc) { | |
827 | jfs_err("metapage_init failed w/rc = %d", rc); | |
828 | goto free_slab; | |
829 | } | |
830 | ||
831 | /* | |
832 | * Transaction Manager initialization | |
833 | */ | |
834 | rc = txInit(); | |
835 | if (rc) { | |
836 | jfs_err("txInit failed w/rc = %d", rc); | |
837 | goto free_metapage; | |
838 | } | |
839 | ||
840 | /* | |
841 | * I/O completion thread (endio) | |
842 | */ | |
91dbb4de CH |
843 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
844 | if (IS_ERR(jfsIOthread)) { | |
845 | rc = PTR_ERR(jfsIOthread); | |
846 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
847 | goto end_txmngr; |
848 | } | |
1da177e4 LT |
849 | |
850 | if (commit_threads < 1) | |
851 | commit_threads = num_online_cpus(); | |
852 | if (commit_threads > MAX_COMMIT_THREADS) | |
853 | commit_threads = MAX_COMMIT_THREADS; | |
854 | ||
855 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
856 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
857 | if (IS_ERR(jfsCommitThread[i])) { | |
858 | rc = PTR_ERR(jfsCommitThread[i]); | |
859 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
860 | commit_threads = i; |
861 | goto kill_committask; | |
862 | } | |
1da177e4 LT |
863 | } |
864 | ||
91dbb4de CH |
865 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
866 | if (IS_ERR(jfsSyncThread)) { | |
867 | rc = PTR_ERR(jfsSyncThread); | |
868 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
869 | goto kill_committask; |
870 | } | |
1da177e4 LT |
871 | |
872 | #ifdef PROC_FS_JFS | |
873 | jfs_proc_init(); | |
874 | #endif | |
875 | ||
76bf09fc AV |
876 | rc = register_filesystem(&jfs_fs_type); |
877 | if (!rc) | |
878 | return 0; | |
1da177e4 | 879 | |
76bf09fc AV |
880 | #ifdef PROC_FS_JFS |
881 | jfs_proc_clean(); | |
882 | #endif | |
883 | kthread_stop(jfsSyncThread); | |
1da177e4 | 884 | kill_committask: |
1da177e4 | 885 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
886 | kthread_stop(jfsCommitThread[i]); |
887 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
888 | end_txmngr: |
889 | txExit(); | |
890 | free_metapage: | |
891 | metapage_exit(); | |
892 | free_slab: | |
893 | kmem_cache_destroy(jfs_inode_cachep); | |
894 | return rc; | |
895 | } | |
896 | ||
897 | static void __exit exit_jfs_fs(void) | |
898 | { | |
899 | int i; | |
900 | ||
901 | jfs_info("exit_jfs_fs called"); | |
902 | ||
1da177e4 LT |
903 | txExit(); |
904 | metapage_exit(); | |
91dbb4de CH |
905 | |
906 | kthread_stop(jfsIOthread); | |
1da177e4 | 907 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
908 | kthread_stop(jfsCommitThread[i]); |
909 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
910 | #ifdef PROC_FS_JFS |
911 | jfs_proc_clean(); | |
912 | #endif | |
913 | unregister_filesystem(&jfs_fs_type); | |
914 | kmem_cache_destroy(jfs_inode_cachep); | |
915 | } | |
916 | ||
917 | module_init(init_jfs_fs) | |
918 | module_exit(exit_jfs_fs) |