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> |
1da177e4 | 33 | #include <asm/uaccess.h> |
8fc2751b | 34 | #include <linux/seq_file.h> |
337eb00a | 35 | #include <linux/smp_lock.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); | |
131 | ||
132 | #ifdef CONFIG_JFS_POSIX_ACL | |
133 | if (ji->i_acl != JFS_ACL_NOT_CACHED) { | |
134 | posix_acl_release(ji->i_acl); | |
135 | ji->i_acl = JFS_ACL_NOT_CACHED; | |
136 | } | |
137 | if (ji->i_default_acl != JFS_ACL_NOT_CACHED) { | |
138 | posix_acl_release(ji->i_default_acl); | |
139 | ji->i_default_acl = JFS_ACL_NOT_CACHED; | |
140 | } | |
141 | #endif | |
142 | ||
143 | kmem_cache_free(jfs_inode_cachep, ji); | |
144 | } | |
145 | ||
726c3342 | 146 | static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 147 | { |
726c3342 | 148 | struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
1da177e4 LT |
149 | s64 maxinodes; |
150 | struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; | |
151 | ||
152 | jfs_info("In jfs_statfs"); | |
153 | buf->f_type = JFS_SUPER_MAGIC; | |
154 | buf->f_bsize = sbi->bsize; | |
155 | buf->f_blocks = sbi->bmap->db_mapsize; | |
156 | buf->f_bfree = sbi->bmap->db_nfree; | |
157 | buf->f_bavail = sbi->bmap->db_nfree; | |
158 | /* | |
159 | * If we really return the number of allocated & free inodes, some | |
160 | * applications will fail because they won't see enough free inodes. | |
161 | * We'll try to calculate some guess as to how may inodes we can | |
162 | * really allocate | |
163 | * | |
164 | * buf->f_files = atomic_read(&imap->im_numinos); | |
165 | * buf->f_ffree = atomic_read(&imap->im_numfree); | |
166 | */ | |
167 | maxinodes = min((s64) atomic_read(&imap->im_numinos) + | |
168 | ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) | |
169 | << L2INOSPEREXT), (s64) 0xffffffffLL); | |
170 | buf->f_files = maxinodes; | |
171 | buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - | |
172 | atomic_read(&imap->im_numfree)); | |
b5c816a4 CL |
173 | buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2); |
174 | buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2, | |
175 | sizeof(sbi->uuid)/2); | |
1da177e4 LT |
176 | |
177 | buf->f_namelen = JFS_NAME_MAX; | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static void jfs_put_super(struct super_block *sb) | |
182 | { | |
183 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
184 | int rc; | |
185 | ||
186 | jfs_info("In jfs_put_super"); | |
6cfd0148 CH |
187 | |
188 | lock_kernel(); | |
189 | ||
1da177e4 LT |
190 | rc = jfs_umount(sb); |
191 | if (rc) | |
192 | jfs_err("jfs_umount failed with return code %d", rc); | |
193 | if (sbi->nls_tab) | |
194 | unload_nls(sbi->nls_tab); | |
195 | sbi->nls_tab = NULL; | |
196 | ||
7fab479b DK |
197 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
198 | iput(sbi->direct_inode); | |
199 | sbi->direct_inode = NULL; | |
200 | ||
1da177e4 | 201 | kfree(sbi); |
6cfd0148 CH |
202 | |
203 | unlock_kernel(); | |
1da177e4 LT |
204 | } |
205 | ||
206 | enum { | |
207 | Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, | |
8fc2751b | 208 | Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
69eb66d7 | 209 | Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask |
1da177e4 LT |
210 | }; |
211 | ||
a447c093 | 212 | static const match_table_t tokens = { |
1da177e4 LT |
213 | {Opt_integrity, "integrity"}, |
214 | {Opt_nointegrity, "nointegrity"}, | |
215 | {Opt_iocharset, "iocharset=%s"}, | |
216 | {Opt_resize, "resize=%u"}, | |
217 | {Opt_resize_nosize, "resize"}, | |
218 | {Opt_errors, "errors=%s"}, | |
219 | {Opt_ignore, "noquota"}, | |
220 | {Opt_ignore, "quota"}, | |
8fc2751b MB |
221 | {Opt_usrquota, "usrquota"}, |
222 | {Opt_grpquota, "grpquota"}, | |
69eb66d7 DK |
223 | {Opt_uid, "uid=%u"}, |
224 | {Opt_gid, "gid=%u"}, | |
225 | {Opt_umask, "umask=%u"}, | |
1da177e4 LT |
226 | {Opt_err, NULL} |
227 | }; | |
228 | ||
229 | static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, | |
230 | int *flag) | |
231 | { | |
232 | void *nls_map = (void *)-1; /* -1: no change; NULL: none */ | |
233 | char *p; | |
234 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
235 | ||
236 | *newLVSize = 0; | |
237 | ||
238 | if (!options) | |
239 | return 1; | |
240 | ||
241 | while ((p = strsep(&options, ",")) != NULL) { | |
242 | substring_t args[MAX_OPT_ARGS]; | |
243 | int token; | |
244 | if (!*p) | |
245 | continue; | |
246 | ||
247 | token = match_token(p, tokens, args); | |
248 | switch (token) { | |
249 | case Opt_integrity: | |
250 | *flag &= ~JFS_NOINTEGRITY; | |
251 | break; | |
252 | case Opt_nointegrity: | |
253 | *flag |= JFS_NOINTEGRITY; | |
254 | break; | |
255 | case Opt_ignore: | |
256 | /* Silently ignore the quota options */ | |
257 | /* Don't do anything ;-) */ | |
258 | break; | |
259 | case Opt_iocharset: | |
260 | if (nls_map && nls_map != (void *) -1) | |
261 | unload_nls(nls_map); | |
262 | if (!strcmp(args[0].from, "none")) | |
263 | nls_map = NULL; | |
264 | else { | |
265 | nls_map = load_nls(args[0].from); | |
266 | if (!nls_map) { | |
267 | printk(KERN_ERR | |
268 | "JFS: charset not found\n"); | |
269 | goto cleanup; | |
270 | } | |
271 | } | |
272 | break; | |
273 | case Opt_resize: | |
274 | { | |
275 | char *resize = args[0].from; | |
276 | *newLVSize = simple_strtoull(resize, &resize, 0); | |
277 | break; | |
278 | } | |
279 | case Opt_resize_nosize: | |
280 | { | |
281 | *newLVSize = sb->s_bdev->bd_inode->i_size >> | |
282 | sb->s_blocksize_bits; | |
283 | if (*newLVSize == 0) | |
284 | printk(KERN_ERR | |
285 | "JFS: Cannot determine volume size\n"); | |
286 | break; | |
287 | } | |
288 | case Opt_errors: | |
289 | { | |
290 | char *errors = args[0].from; | |
291 | if (!errors || !*errors) | |
292 | goto cleanup; | |
293 | if (!strcmp(errors, "continue")) { | |
294 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
295 | *flag &= ~JFS_ERR_PANIC; | |
296 | *flag |= JFS_ERR_CONTINUE; | |
297 | } else if (!strcmp(errors, "remount-ro")) { | |
298 | *flag &= ~JFS_ERR_CONTINUE; | |
299 | *flag &= ~JFS_ERR_PANIC; | |
300 | *flag |= JFS_ERR_REMOUNT_RO; | |
301 | } else if (!strcmp(errors, "panic")) { | |
302 | *flag &= ~JFS_ERR_CONTINUE; | |
303 | *flag &= ~JFS_ERR_REMOUNT_RO; | |
304 | *flag |= JFS_ERR_PANIC; | |
305 | } else { | |
306 | printk(KERN_ERR | |
307 | "JFS: %s is an invalid error handler\n", | |
308 | errors); | |
309 | goto cleanup; | |
310 | } | |
311 | break; | |
312 | } | |
8fc2751b | 313 | |
115ff50b | 314 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
315 | case Opt_quota: |
316 | case Opt_usrquota: | |
317 | *flag |= JFS_USRQUOTA; | |
318 | break; | |
319 | case Opt_grpquota: | |
320 | *flag |= JFS_GRPQUOTA; | |
321 | break; | |
322 | #else | |
323 | case Opt_usrquota: | |
324 | case Opt_grpquota: | |
325 | case Opt_quota: | |
326 | printk(KERN_ERR | |
327 | "JFS: quota operations not supported\n"); | |
328 | break; | |
329 | #endif | |
69eb66d7 DK |
330 | case Opt_uid: |
331 | { | |
332 | char *uid = args[0].from; | |
333 | sbi->uid = simple_strtoul(uid, &uid, 0); | |
334 | break; | |
335 | } | |
336 | case Opt_gid: | |
337 | { | |
338 | char *gid = args[0].from; | |
339 | sbi->gid = simple_strtoul(gid, &gid, 0); | |
340 | break; | |
341 | } | |
342 | case Opt_umask: | |
343 | { | |
344 | char *umask = args[0].from; | |
345 | sbi->umask = simple_strtoul(umask, &umask, 8); | |
346 | if (sbi->umask & ~0777) { | |
347 | printk(KERN_ERR | |
348 | "JFS: Invalid value of umask\n"); | |
349 | goto cleanup; | |
350 | } | |
351 | break; | |
352 | } | |
1da177e4 LT |
353 | default: |
354 | printk("jfs: Unrecognized mount option \"%s\" " | |
355 | " or missing value\n", p); | |
356 | goto cleanup; | |
357 | } | |
358 | } | |
359 | ||
360 | if (nls_map != (void *) -1) { | |
361 | /* Discard old (if remount) */ | |
362 | if (sbi->nls_tab) | |
363 | unload_nls(sbi->nls_tab); | |
364 | sbi->nls_tab = nls_map; | |
365 | } | |
366 | return 1; | |
367 | ||
368 | cleanup: | |
369 | if (nls_map && nls_map != (void *) -1) | |
370 | unload_nls(nls_map); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static int jfs_remount(struct super_block *sb, int *flags, char *data) | |
375 | { | |
376 | s64 newLVSize = 0; | |
377 | int rc = 0; | |
378 | int flag = JFS_SBI(sb)->flag; | |
337eb00a | 379 | int ret; |
1da177e4 LT |
380 | |
381 | if (!parse_options(data, sb, &newLVSize, &flag)) { | |
382 | return -EINVAL; | |
383 | } | |
337eb00a | 384 | lock_kernel(); |
1da177e4 LT |
385 | if (newLVSize) { |
386 | if (sb->s_flags & MS_RDONLY) { | |
387 | printk(KERN_ERR | |
388 | "JFS: resize requires volume to be mounted read-write\n"); | |
337eb00a | 389 | unlock_kernel(); |
1da177e4 LT |
390 | return -EROFS; |
391 | } | |
392 | rc = jfs_extendfs(sb, newLVSize, 0); | |
337eb00a AIB |
393 | if (rc) { |
394 | unlock_kernel(); | |
1da177e4 | 395 | return rc; |
337eb00a | 396 | } |
1da177e4 LT |
397 | } |
398 | ||
399 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
7fab479b DK |
400 | /* |
401 | * Invalidate any previously read metadata. fsck may have | |
402 | * changed the on-disk data since we mounted r/o | |
403 | */ | |
404 | truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); | |
405 | ||
1da177e4 | 406 | JFS_SBI(sb)->flag = flag; |
337eb00a AIB |
407 | ret = jfs_mount_rw(sb, 1); |
408 | unlock_kernel(); | |
409 | return ret; | |
1da177e4 LT |
410 | } |
411 | if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) { | |
412 | rc = jfs_umount_rw(sb); | |
413 | JFS_SBI(sb)->flag = flag; | |
337eb00a | 414 | unlock_kernel(); |
1da177e4 LT |
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); | |
337eb00a AIB |
420 | if (rc) { |
421 | unlock_kernel(); | |
1da177e4 | 422 | return rc; |
337eb00a | 423 | } |
1da177e4 | 424 | JFS_SBI(sb)->flag = flag; |
337eb00a AIB |
425 | ret = jfs_mount_rw(sb, 1); |
426 | unlock_kernel(); | |
427 | return ret; | |
1da177e4 LT |
428 | } |
429 | JFS_SBI(sb)->flag = flag; | |
430 | ||
337eb00a | 431 | unlock_kernel(); |
1da177e4 LT |
432 | return 0; |
433 | } | |
434 | ||
435 | static int jfs_fill_super(struct super_block *sb, void *data, int silent) | |
436 | { | |
437 | struct jfs_sb_info *sbi; | |
438 | struct inode *inode; | |
439 | int rc; | |
440 | s64 newLVSize = 0; | |
eab1df71 | 441 | int flag, ret = -EINVAL; |
1da177e4 LT |
442 | |
443 | jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); | |
444 | ||
445 | if (!new_valid_dev(sb->s_bdev->bd_dev)) | |
446 | return -EOVERFLOW; | |
447 | ||
5b3030e3 | 448 | sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL); |
1da177e4 | 449 | if (!sbi) |
087387f9 | 450 | return -ENOMEM; |
1da177e4 LT |
451 | sb->s_fs_info = sbi; |
452 | sbi->sb = sb; | |
69eb66d7 | 453 | sbi->uid = sbi->gid = sbi->umask = -1; |
1da177e4 LT |
454 | |
455 | /* initialize the mount flag and determine the default error handler */ | |
456 | flag = JFS_ERR_REMOUNT_RO; | |
457 | ||
458 | if (!parse_options((char *) data, sb, &newLVSize, &flag)) { | |
459 | kfree(sbi); | |
460 | return -EINVAL; | |
461 | } | |
462 | sbi->flag = flag; | |
463 | ||
464 | #ifdef CONFIG_JFS_POSIX_ACL | |
465 | sb->s_flags |= MS_POSIXACL; | |
466 | #endif | |
467 | ||
468 | if (newLVSize) { | |
469 | printk(KERN_ERR "resize option for remount only\n"); | |
470 | return -EINVAL; | |
471 | } | |
472 | ||
473 | /* | |
474 | * Initialize blocksize to 4K. | |
475 | */ | |
476 | sb_set_blocksize(sb, PSIZE); | |
477 | ||
478 | /* | |
479 | * Set method vectors. | |
480 | */ | |
481 | sb->s_op = &jfs_super_operations; | |
482 | sb->s_export_op = &jfs_export_operations; | |
483 | ||
7fab479b DK |
484 | /* |
485 | * Initialize direct-mapping inode/address-space | |
486 | */ | |
487 | inode = new_inode(sb); | |
eab1df71 DH |
488 | if (inode == NULL) { |
489 | ret = -ENOMEM; | |
7fab479b | 490 | goto out_kfree; |
eab1df71 | 491 | } |
7fab479b DK |
492 | inode->i_ino = 0; |
493 | inode->i_nlink = 1; | |
494 | inode->i_size = sb->s_bdev->bd_inode->i_size; | |
495 | inode->i_mapping->a_ops = &jfs_metapage_aops; | |
ac17b8b5 | 496 | insert_inode_hash(inode); |
7fab479b DK |
497 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
498 | ||
499 | sbi->direct_inode = inode; | |
500 | ||
1da177e4 LT |
501 | rc = jfs_mount(sb); |
502 | if (rc) { | |
503 | if (!silent) { | |
504 | jfs_err("jfs_mount failed w/return code = %d", rc); | |
505 | } | |
7fab479b | 506 | goto out_mount_failed; |
1da177e4 LT |
507 | } |
508 | if (sb->s_flags & MS_RDONLY) | |
509 | sbi->log = NULL; | |
510 | else { | |
511 | rc = jfs_mount_rw(sb, 0); | |
512 | if (rc) { | |
513 | if (!silent) { | |
514 | jfs_err("jfs_mount_rw failed, return code = %d", | |
515 | rc); | |
516 | } | |
517 | goto out_no_rw; | |
518 | } | |
519 | } | |
520 | ||
521 | sb->s_magic = JFS_SUPER_MAGIC; | |
522 | ||
eab1df71 DH |
523 | inode = jfs_iget(sb, ROOT_I); |
524 | if (IS_ERR(inode)) { | |
525 | ret = PTR_ERR(inode); | |
6536d289 | 526 | goto out_no_rw; |
eab1df71 | 527 | } |
1da177e4 LT |
528 | sb->s_root = d_alloc_root(inode); |
529 | if (!sb->s_root) | |
530 | goto out_no_root; | |
531 | ||
532 | if (sbi->mntflag & JFS_OS2) | |
533 | sb->s_root->d_op = &jfs_ci_dentry_operations; | |
534 | ||
535 | /* logical blocks are represented by 40 bits in pxd_t, etc. */ | |
536 | sb->s_maxbytes = ((u64) sb->s_blocksize) << 40; | |
537 | #if BITS_PER_LONG == 32 | |
538 | /* | |
539 | * Page cache is indexed by long. | |
540 | * I would use MAX_LFS_FILESIZE, but it's only half as big | |
541 | */ | |
542 | sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes); | |
543 | #endif | |
544 | sb->s_time_gran = 1; | |
545 | return 0; | |
546 | ||
547 | out_no_root: | |
6536d289 DK |
548 | jfs_err("jfs_read_super: get root dentry failed"); |
549 | iput(inode); | |
1da177e4 LT |
550 | |
551 | out_no_rw: | |
552 | rc = jfs_umount(sb); | |
553 | if (rc) { | |
554 | jfs_err("jfs_umount failed with return code %d", rc); | |
555 | } | |
7fab479b | 556 | out_mount_failed: |
28fd1298 | 557 | filemap_write_and_wait(sbi->direct_inode->i_mapping); |
7fab479b DK |
558 | truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
559 | make_bad_inode(sbi->direct_inode); | |
560 | iput(sbi->direct_inode); | |
561 | sbi->direct_inode = NULL; | |
1da177e4 LT |
562 | out_kfree: |
563 | if (sbi->nls_tab) | |
564 | unload_nls(sbi->nls_tab); | |
565 | kfree(sbi); | |
eab1df71 | 566 | return ret; |
1da177e4 LT |
567 | } |
568 | ||
c4be0c1d | 569 | static int jfs_freeze(struct super_block *sb) |
1da177e4 LT |
570 | { |
571 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
572 | struct jfs_log *log = sbi->log; | |
573 | ||
574 | if (!(sb->s_flags & MS_RDONLY)) { | |
575 | txQuiesce(sb); | |
576 | lmLogShutdown(log); | |
577 | updateSuper(sb, FM_CLEAN); | |
578 | } | |
c4be0c1d | 579 | return 0; |
1da177e4 LT |
580 | } |
581 | ||
c4be0c1d | 582 | static int jfs_unfreeze(struct super_block *sb) |
1da177e4 LT |
583 | { |
584 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
585 | struct jfs_log *log = sbi->log; | |
586 | int rc = 0; | |
587 | ||
588 | if (!(sb->s_flags & MS_RDONLY)) { | |
589 | updateSuper(sb, FM_MOUNT); | |
590 | if ((rc = lmLogInit(log))) | |
591 | jfs_err("jfs_unlock failed with return code %d", rc); | |
592 | else | |
593 | txResume(sb); | |
594 | } | |
c4be0c1d | 595 | return 0; |
1da177e4 LT |
596 | } |
597 | ||
454e2398 DH |
598 | static int jfs_get_sb(struct file_system_type *fs_type, |
599 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 600 | { |
454e2398 DH |
601 | return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super, |
602 | mnt); | |
1da177e4 LT |
603 | } |
604 | ||
605 | static int jfs_sync_fs(struct super_block *sb, int wait) | |
606 | { | |
607 | struct jfs_log *log = JFS_SBI(sb)->log; | |
608 | ||
609 | /* log == NULL indicates read-only mount */ | |
1c627829 | 610 | if (log) { |
1da177e4 | 611 | jfs_flush_journal(log, wait); |
cbc3d65e | 612 | jfs_syncpt(log, 0); |
1c627829 | 613 | } |
1da177e4 LT |
614 | |
615 | return 0; | |
616 | } | |
617 | ||
8fc2751b MB |
618 | static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) |
619 | { | |
620 | struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb); | |
621 | ||
69eb66d7 DK |
622 | if (sbi->uid != -1) |
623 | seq_printf(seq, ",uid=%d", sbi->uid); | |
624 | if (sbi->gid != -1) | |
625 | seq_printf(seq, ",gid=%d", sbi->gid); | |
626 | if (sbi->umask != -1) | |
627 | seq_printf(seq, ",umask=%03o", sbi->umask); | |
8fc2751b MB |
628 | if (sbi->flag & JFS_NOINTEGRITY) |
629 | seq_puts(seq, ",nointegrity"); | |
5c5e32ce MS |
630 | if (sbi->nls_tab) |
631 | seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); | |
632 | if (sbi->flag & JFS_ERR_CONTINUE) | |
633 | seq_printf(seq, ",errors=continue"); | |
634 | if (sbi->flag & JFS_ERR_PANIC) | |
635 | seq_printf(seq, ",errors=panic"); | |
8fc2751b | 636 | |
115ff50b | 637 | #ifdef CONFIG_QUOTA |
8fc2751b MB |
638 | if (sbi->flag & JFS_USRQUOTA) |
639 | seq_puts(seq, ",usrquota"); | |
640 | ||
641 | if (sbi->flag & JFS_GRPQUOTA) | |
642 | seq_puts(seq, ",grpquota"); | |
643 | #endif | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
115ff50b DK |
648 | #ifdef CONFIG_QUOTA |
649 | ||
650 | /* Read data from quotafile - avoid pagecache and such because we cannot afford | |
651 | * acquiring the locks... As quota files are never truncated and quota code | |
652 | * itself serializes the operations (and noone else should touch the files) | |
653 | * we don't have to be afraid of races */ | |
654 | static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, | |
655 | size_t len, loff_t off) | |
656 | { | |
657 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
658 | sector_t blk = off >> sb->s_blocksize_bits; | |
659 | int err = 0; | |
660 | int offset = off & (sb->s_blocksize - 1); | |
661 | int tocopy; | |
662 | size_t toread; | |
663 | struct buffer_head tmp_bh; | |
664 | struct buffer_head *bh; | |
665 | loff_t i_size = i_size_read(inode); | |
666 | ||
667 | if (off > i_size) | |
668 | return 0; | |
669 | if (off+len > i_size) | |
670 | len = i_size-off; | |
671 | toread = len; | |
672 | while (toread > 0) { | |
673 | tocopy = sb->s_blocksize - offset < toread ? | |
674 | sb->s_blocksize - offset : toread; | |
675 | ||
676 | tmp_bh.b_state = 0; | |
677 | tmp_bh.b_size = 1 << inode->i_blkbits; | |
678 | err = jfs_get_block(inode, blk, &tmp_bh, 0); | |
679 | if (err) | |
680 | return err; | |
681 | if (!buffer_mapped(&tmp_bh)) /* A hole? */ | |
682 | memset(data, 0, tocopy); | |
683 | else { | |
684 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
685 | if (!bh) | |
686 | return -EIO; | |
687 | memcpy(data, bh->b_data+offset, tocopy); | |
688 | brelse(bh); | |
689 | } | |
690 | offset = 0; | |
691 | toread -= tocopy; | |
692 | data += tocopy; | |
693 | blk++; | |
694 | } | |
695 | return len; | |
696 | } | |
697 | ||
698 | /* Write to quotafile */ | |
699 | static ssize_t jfs_quota_write(struct super_block *sb, int type, | |
700 | const char *data, size_t len, loff_t off) | |
701 | { | |
702 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
703 | sector_t blk = off >> sb->s_blocksize_bits; | |
704 | int err = 0; | |
705 | int offset = off & (sb->s_blocksize - 1); | |
706 | int tocopy; | |
707 | size_t towrite = len; | |
708 | struct buffer_head tmp_bh; | |
709 | struct buffer_head *bh; | |
710 | ||
711 | mutex_lock(&inode->i_mutex); | |
712 | while (towrite > 0) { | |
713 | tocopy = sb->s_blocksize - offset < towrite ? | |
714 | sb->s_blocksize - offset : towrite; | |
715 | ||
716 | tmp_bh.b_state = 0; | |
8bcb2839 | 717 | tmp_bh.b_size = 1 << inode->i_blkbits; |
115ff50b DK |
718 | err = jfs_get_block(inode, blk, &tmp_bh, 1); |
719 | if (err) | |
720 | goto out; | |
721 | if (offset || tocopy != sb->s_blocksize) | |
722 | bh = sb_bread(sb, tmp_bh.b_blocknr); | |
723 | else | |
724 | bh = sb_getblk(sb, tmp_bh.b_blocknr); | |
725 | if (!bh) { | |
726 | err = -EIO; | |
727 | goto out; | |
728 | } | |
729 | lock_buffer(bh); | |
730 | memcpy(bh->b_data+offset, data, tocopy); | |
731 | flush_dcache_page(bh->b_page); | |
732 | set_buffer_uptodate(bh); | |
733 | mark_buffer_dirty(bh); | |
734 | unlock_buffer(bh); | |
735 | brelse(bh); | |
736 | offset = 0; | |
737 | towrite -= tocopy; | |
738 | data += tocopy; | |
739 | blk++; | |
740 | } | |
741 | out: | |
9c83633a DC |
742 | if (len == towrite) { |
743 | mutex_unlock(&inode->i_mutex); | |
115ff50b | 744 | return err; |
9c83633a | 745 | } |
115ff50b DK |
746 | if (inode->i_size < off+len-towrite) |
747 | i_size_write(inode, off+len-towrite); | |
748 | inode->i_version++; | |
749 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
750 | mark_inode_dirty(inode); | |
751 | mutex_unlock(&inode->i_mutex); | |
752 | return len - towrite; | |
753 | } | |
754 | ||
755 | #endif | |
756 | ||
ee9b6d61 | 757 | static const struct super_operations jfs_super_operations = { |
1da177e4 LT |
758 | .alloc_inode = jfs_alloc_inode, |
759 | .destroy_inode = jfs_destroy_inode, | |
1da177e4 LT |
760 | .dirty_inode = jfs_dirty_inode, |
761 | .write_inode = jfs_write_inode, | |
762 | .delete_inode = jfs_delete_inode, | |
763 | .put_super = jfs_put_super, | |
764 | .sync_fs = jfs_sync_fs, | |
c4be0c1d TS |
765 | .freeze_fs = jfs_freeze, |
766 | .unfreeze_fs = jfs_unfreeze, | |
1da177e4 LT |
767 | .statfs = jfs_statfs, |
768 | .remount_fs = jfs_remount, | |
115ff50b DK |
769 | .show_options = jfs_show_options, |
770 | #ifdef CONFIG_QUOTA | |
771 | .quota_read = jfs_quota_read, | |
772 | .quota_write = jfs_quota_write, | |
773 | #endif | |
1da177e4 LT |
774 | }; |
775 | ||
39655164 | 776 | static const struct export_operations jfs_export_operations = { |
d425de70 CH |
777 | .fh_to_dentry = jfs_fh_to_dentry, |
778 | .fh_to_parent = jfs_fh_to_parent, | |
1da177e4 LT |
779 | .get_parent = jfs_get_parent, |
780 | }; | |
781 | ||
782 | static struct file_system_type jfs_fs_type = { | |
783 | .owner = THIS_MODULE, | |
784 | .name = "jfs", | |
785 | .get_sb = jfs_get_sb, | |
786 | .kill_sb = kill_block_super, | |
787 | .fs_flags = FS_REQUIRES_DEV, | |
788 | }; | |
789 | ||
51cc5068 | 790 | static void init_once(void *foo) |
1da177e4 LT |
791 | { |
792 | struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; | |
793 | ||
a35afb83 CL |
794 | memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
795 | INIT_LIST_HEAD(&jfs_ip->anon_inode_list); | |
796 | init_rwsem(&jfs_ip->rdwrlock); | |
797 | mutex_init(&jfs_ip->commit_mutex); | |
798 | init_rwsem(&jfs_ip->xattr_sem); | |
799 | spin_lock_init(&jfs_ip->ag_lock); | |
800 | jfs_ip->active_ag = -1; | |
1da177e4 | 801 | #ifdef CONFIG_JFS_POSIX_ACL |
a35afb83 CL |
802 | jfs_ip->i_acl = JFS_ACL_NOT_CACHED; |
803 | jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED; | |
1da177e4 | 804 | #endif |
a35afb83 | 805 | inode_init_once(&jfs_ip->vfs_inode); |
1da177e4 LT |
806 | } |
807 | ||
808 | static int __init init_jfs_fs(void) | |
809 | { | |
810 | int i; | |
811 | int rc; | |
812 | ||
813 | jfs_inode_cachep = | |
63f83c9f | 814 | kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0, |
fffb60f9 | 815 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 816 | init_once); |
1da177e4 LT |
817 | if (jfs_inode_cachep == NULL) |
818 | return -ENOMEM; | |
819 | ||
820 | /* | |
821 | * Metapage initialization | |
822 | */ | |
823 | rc = metapage_init(); | |
824 | if (rc) { | |
825 | jfs_err("metapage_init failed w/rc = %d", rc); | |
826 | goto free_slab; | |
827 | } | |
828 | ||
829 | /* | |
830 | * Transaction Manager initialization | |
831 | */ | |
832 | rc = txInit(); | |
833 | if (rc) { | |
834 | jfs_err("txInit failed w/rc = %d", rc); | |
835 | goto free_metapage; | |
836 | } | |
837 | ||
838 | /* | |
839 | * I/O completion thread (endio) | |
840 | */ | |
91dbb4de CH |
841 | jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
842 | if (IS_ERR(jfsIOthread)) { | |
843 | rc = PTR_ERR(jfsIOthread); | |
844 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
845 | goto end_txmngr; |
846 | } | |
1da177e4 LT |
847 | |
848 | if (commit_threads < 1) | |
849 | commit_threads = num_online_cpus(); | |
850 | if (commit_threads > MAX_COMMIT_THREADS) | |
851 | commit_threads = MAX_COMMIT_THREADS; | |
852 | ||
853 | for (i = 0; i < commit_threads; i++) { | |
91dbb4de CH |
854 | jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit"); |
855 | if (IS_ERR(jfsCommitThread[i])) { | |
856 | rc = PTR_ERR(jfsCommitThread[i]); | |
857 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
858 | commit_threads = i; |
859 | goto kill_committask; | |
860 | } | |
1da177e4 LT |
861 | } |
862 | ||
91dbb4de CH |
863 | jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
864 | if (IS_ERR(jfsSyncThread)) { | |
865 | rc = PTR_ERR(jfsSyncThread); | |
866 | jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); | |
1da177e4 LT |
867 | goto kill_committask; |
868 | } | |
1da177e4 LT |
869 | |
870 | #ifdef PROC_FS_JFS | |
871 | jfs_proc_init(); | |
872 | #endif | |
873 | ||
874 | return register_filesystem(&jfs_fs_type); | |
875 | ||
876 | kill_committask: | |
1da177e4 | 877 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
878 | kthread_stop(jfsCommitThread[i]); |
879 | kthread_stop(jfsIOthread); | |
1da177e4 LT |
880 | end_txmngr: |
881 | txExit(); | |
882 | free_metapage: | |
883 | metapage_exit(); | |
884 | free_slab: | |
885 | kmem_cache_destroy(jfs_inode_cachep); | |
886 | return rc; | |
887 | } | |
888 | ||
889 | static void __exit exit_jfs_fs(void) | |
890 | { | |
891 | int i; | |
892 | ||
893 | jfs_info("exit_jfs_fs called"); | |
894 | ||
1da177e4 LT |
895 | txExit(); |
896 | metapage_exit(); | |
91dbb4de CH |
897 | |
898 | kthread_stop(jfsIOthread); | |
1da177e4 | 899 | for (i = 0; i < commit_threads; i++) |
91dbb4de CH |
900 | kthread_stop(jfsCommitThread[i]); |
901 | kthread_stop(jfsSyncThread); | |
1da177e4 LT |
902 | #ifdef PROC_FS_JFS |
903 | jfs_proc_clean(); | |
904 | #endif | |
905 | unregister_filesystem(&jfs_fs_type); | |
906 | kmem_cache_destroy(jfs_inode_cachep); | |
907 | } | |
908 | ||
909 | module_init(init_jfs_fs) | |
910 | module_exit(exit_jfs_fs) |