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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * super.c | |
5 | * | |
6 | * load/unload driver, mount/dismount volumes | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/types.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/highmem.h> | |
31 | #include <linux/utsname.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/random.h> | |
34 | #include <linux/statfs.h> | |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/blkdev.h> | |
37 | #include <linux/socket.h> | |
38 | #include <linux/inet.h> | |
39 | #include <linux/parser.h> | |
40 | #include <linux/crc32.h> | |
41 | #include <linux/debugfs.h> | |
42 | ||
43 | #include <cluster/nodemanager.h> | |
44 | ||
45 | #define MLOG_MASK_PREFIX ML_SUPER | |
46 | #include <cluster/masklog.h> | |
47 | ||
48 | #include "ocfs2.h" | |
49 | ||
50 | /* this should be the only file to include a version 1 header */ | |
51 | #include "ocfs1_fs_compat.h" | |
52 | ||
53 | #include "alloc.h" | |
54 | #include "dlmglue.h" | |
55 | #include "export.h" | |
56 | #include "extent_map.h" | |
57 | #include "heartbeat.h" | |
58 | #include "inode.h" | |
59 | #include "journal.h" | |
60 | #include "localalloc.h" | |
61 | #include "namei.h" | |
62 | #include "slot_map.h" | |
63 | #include "super.h" | |
64 | #include "sysfile.h" | |
65 | #include "uptodate.h" | |
66 | #include "ver.h" | |
67 | #include "vote.h" | |
68 | ||
69 | #include "buffer_head_io.h" | |
70 | ||
ccd979bd MF |
71 | static kmem_cache_t *ocfs2_inode_cachep = NULL; |
72 | ||
73 | kmem_cache_t *ocfs2_lock_cache = NULL; | |
74 | ||
75 | /* OCFS2 needs to schedule several differnt types of work which | |
76 | * require cluster locking, disk I/O, recovery waits, etc. Since these | |
77 | * types of work tend to be heavy we avoid using the kernel events | |
78 | * workqueue and schedule on our own. */ | |
79 | struct workqueue_struct *ocfs2_wq = NULL; | |
80 | ||
81 | static struct dentry *ocfs2_debugfs_root = NULL; | |
82 | ||
83 | MODULE_AUTHOR("Oracle"); | |
84 | MODULE_LICENSE("GPL"); | |
85 | ||
86 | static int ocfs2_parse_options(struct super_block *sb, char *options, | |
87 | unsigned long *mount_opt, int is_remount); | |
88 | static void ocfs2_put_super(struct super_block *sb); | |
89 | static int ocfs2_mount_volume(struct super_block *sb); | |
90 | static int ocfs2_remount(struct super_block *sb, int *flags, char *data); | |
91 | static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); | |
92 | static int ocfs2_initialize_mem_caches(void); | |
93 | static void ocfs2_free_mem_caches(void); | |
94 | static void ocfs2_delete_osb(struct ocfs2_super *osb); | |
95 | ||
726c3342 | 96 | static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); |
ccd979bd MF |
97 | |
98 | static int ocfs2_sync_fs(struct super_block *sb, int wait); | |
99 | ||
100 | static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); | |
101 | static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); | |
102 | static int ocfs2_release_system_inodes(struct ocfs2_super *osb); | |
103 | static int ocfs2_fill_local_node_info(struct ocfs2_super *osb); | |
104 | static int ocfs2_check_volume(struct ocfs2_super *osb); | |
105 | static int ocfs2_verify_volume(struct ocfs2_dinode *di, | |
106 | struct buffer_head *bh, | |
107 | u32 sectsize); | |
108 | static int ocfs2_initialize_super(struct super_block *sb, | |
109 | struct buffer_head *bh, | |
110 | int sector_size); | |
111 | static int ocfs2_get_sector(struct super_block *sb, | |
112 | struct buffer_head **bh, | |
113 | int block, | |
114 | int sect_size); | |
115 | static void ocfs2_write_super(struct super_block *sb); | |
116 | static struct inode *ocfs2_alloc_inode(struct super_block *sb); | |
117 | static void ocfs2_destroy_inode(struct inode *inode); | |
118 | ||
119 | static unsigned long long ocfs2_max_file_offset(unsigned int blockshift); | |
120 | ||
121 | static struct super_operations ocfs2_sops = { | |
122 | .statfs = ocfs2_statfs, | |
123 | .alloc_inode = ocfs2_alloc_inode, | |
124 | .destroy_inode = ocfs2_destroy_inode, | |
125 | .drop_inode = ocfs2_drop_inode, | |
126 | .clear_inode = ocfs2_clear_inode, | |
127 | .delete_inode = ocfs2_delete_inode, | |
128 | .sync_fs = ocfs2_sync_fs, | |
129 | .write_super = ocfs2_write_super, | |
130 | .put_super = ocfs2_put_super, | |
131 | .remount_fs = ocfs2_remount, | |
132 | }; | |
133 | ||
134 | enum { | |
135 | Opt_barrier, | |
136 | Opt_err_panic, | |
137 | Opt_err_ro, | |
138 | Opt_intr, | |
139 | Opt_nointr, | |
140 | Opt_hb_none, | |
141 | Opt_hb_local, | |
142 | Opt_data_ordered, | |
143 | Opt_data_writeback, | |
144 | Opt_err, | |
145 | }; | |
146 | ||
147 | static match_table_t tokens = { | |
148 | {Opt_barrier, "barrier=%u"}, | |
149 | {Opt_err_panic, "errors=panic"}, | |
150 | {Opt_err_ro, "errors=remount-ro"}, | |
151 | {Opt_intr, "intr"}, | |
152 | {Opt_nointr, "nointr"}, | |
153 | {Opt_hb_none, OCFS2_HB_NONE}, | |
154 | {Opt_hb_local, OCFS2_HB_LOCAL}, | |
155 | {Opt_data_ordered, "data=ordered"}, | |
156 | {Opt_data_writeback, "data=writeback"}, | |
157 | {Opt_err, NULL} | |
158 | }; | |
159 | ||
160 | /* | |
161 | * write_super and sync_fs ripped right out of ext3. | |
162 | */ | |
163 | static void ocfs2_write_super(struct super_block *sb) | |
164 | { | |
7892f2f4 | 165 | if (mutex_trylock(&sb->s_lock) != 0) |
ccd979bd MF |
166 | BUG(); |
167 | sb->s_dirt = 0; | |
168 | } | |
169 | ||
170 | static int ocfs2_sync_fs(struct super_block *sb, int wait) | |
171 | { | |
172 | int status = 0; | |
173 | tid_t target; | |
174 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
175 | ||
176 | sb->s_dirt = 0; | |
177 | ||
178 | if (ocfs2_is_hard_readonly(osb)) | |
179 | return -EROFS; | |
180 | ||
181 | if (wait) { | |
182 | status = ocfs2_flush_truncate_log(osb); | |
183 | if (status < 0) | |
184 | mlog_errno(status); | |
185 | } else { | |
186 | ocfs2_schedule_truncate_log_flush(osb, 0); | |
187 | } | |
188 | ||
189 | if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { | |
190 | if (wait) | |
191 | log_wait_commit(OCFS2_SB(sb)->journal->j_journal, | |
192 | target); | |
193 | } | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) | |
198 | { | |
199 | struct inode *new = NULL; | |
200 | int status = 0; | |
201 | int i; | |
202 | ||
203 | mlog_entry_void(); | |
204 | ||
205 | new = ocfs2_iget(osb, osb->root_blkno); | |
206 | if (IS_ERR(new)) { | |
207 | status = PTR_ERR(new); | |
208 | mlog_errno(status); | |
209 | goto bail; | |
210 | } | |
211 | osb->root_inode = new; | |
212 | ||
213 | new = ocfs2_iget(osb, osb->system_dir_blkno); | |
214 | if (IS_ERR(new)) { | |
215 | status = PTR_ERR(new); | |
216 | mlog_errno(status); | |
217 | goto bail; | |
218 | } | |
219 | osb->sys_root_inode = new; | |
220 | ||
221 | for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; | |
222 | i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { | |
223 | new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); | |
224 | if (!new) { | |
225 | ocfs2_release_system_inodes(osb); | |
226 | status = -EINVAL; | |
227 | mlog_errno(status); | |
228 | /* FIXME: Should ERROR_RO_FS */ | |
229 | mlog(ML_ERROR, "Unable to load system inode %d, " | |
230 | "possibly corrupt fs?", i); | |
231 | goto bail; | |
232 | } | |
233 | // the array now has one ref, so drop this one | |
234 | iput(new); | |
235 | } | |
236 | ||
237 | bail: | |
238 | mlog_exit(status); | |
239 | return status; | |
240 | } | |
241 | ||
242 | static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) | |
243 | { | |
244 | struct inode *new = NULL; | |
245 | int status = 0; | |
246 | int i; | |
247 | ||
248 | mlog_entry_void(); | |
249 | ||
250 | for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; | |
251 | i < NUM_SYSTEM_INODES; | |
252 | i++) { | |
253 | new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); | |
254 | if (!new) { | |
255 | ocfs2_release_system_inodes(osb); | |
256 | status = -EINVAL; | |
257 | mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", | |
258 | status, i, osb->slot_num); | |
259 | goto bail; | |
260 | } | |
261 | /* the array now has one ref, so drop this one */ | |
262 | iput(new); | |
263 | } | |
264 | ||
265 | bail: | |
266 | mlog_exit(status); | |
267 | return status; | |
268 | } | |
269 | ||
270 | static int ocfs2_release_system_inodes(struct ocfs2_super *osb) | |
271 | { | |
272 | int status = 0, i; | |
273 | struct inode *inode; | |
274 | ||
275 | mlog_entry_void(); | |
276 | ||
277 | for (i = 0; i < NUM_SYSTEM_INODES; i++) { | |
278 | inode = osb->system_inodes[i]; | |
279 | if (inode) { | |
280 | iput(inode); | |
281 | osb->system_inodes[i] = NULL; | |
282 | } | |
283 | } | |
284 | ||
285 | inode = osb->sys_root_inode; | |
286 | if (inode) { | |
287 | iput(inode); | |
288 | osb->sys_root_inode = NULL; | |
289 | } | |
290 | ||
291 | inode = osb->root_inode; | |
292 | if (inode) { | |
293 | iput(inode); | |
294 | osb->root_inode = NULL; | |
295 | } | |
296 | ||
297 | mlog_exit(status); | |
298 | return status; | |
299 | } | |
300 | ||
301 | /* We're allocating fs objects, use GFP_NOFS */ | |
302 | static struct inode *ocfs2_alloc_inode(struct super_block *sb) | |
303 | { | |
304 | struct ocfs2_inode_info *oi; | |
305 | ||
306 | oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS); | |
307 | if (!oi) | |
308 | return NULL; | |
309 | ||
310 | return &oi->vfs_inode; | |
311 | } | |
312 | ||
313 | static void ocfs2_destroy_inode(struct inode *inode) | |
314 | { | |
315 | kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); | |
316 | } | |
317 | ||
318 | /* From xfs_super.c:xfs_max_file_offset | |
319 | * Copyright (c) 2000-2004 Silicon Graphics, Inc. | |
320 | */ | |
321 | static unsigned long long ocfs2_max_file_offset(unsigned int blockshift) | |
322 | { | |
323 | unsigned int pagefactor = 1; | |
324 | unsigned int bitshift = BITS_PER_LONG - 1; | |
325 | ||
326 | /* Figure out maximum filesize, on Linux this can depend on | |
327 | * the filesystem blocksize (on 32 bit platforms). | |
328 | * __block_prepare_write does this in an [unsigned] long... | |
329 | * page->index << (PAGE_CACHE_SHIFT - bbits) | |
330 | * So, for page sized blocks (4K on 32 bit platforms), | |
331 | * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is | |
332 | * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) | |
333 | * but for smaller blocksizes it is less (bbits = log2 bsize). | |
334 | * Note1: get_block_t takes a long (implicit cast from above) | |
335 | * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch | |
336 | * can optionally convert the [unsigned] long from above into | |
337 | * an [unsigned] long long. | |
338 | */ | |
339 | ||
340 | #if BITS_PER_LONG == 32 | |
341 | # if defined(CONFIG_LBD) | |
342 | BUG_ON(sizeof(sector_t) != 8); | |
343 | pagefactor = PAGE_CACHE_SIZE; | |
344 | bitshift = BITS_PER_LONG; | |
345 | # else | |
346 | pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); | |
347 | # endif | |
348 | #endif | |
349 | ||
350 | return (((unsigned long long)pagefactor) << bitshift) - 1; | |
351 | } | |
352 | ||
353 | static int ocfs2_remount(struct super_block *sb, int *flags, char *data) | |
354 | { | |
355 | int incompat_features; | |
356 | int ret = 0; | |
357 | unsigned long parsed_options; | |
358 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
359 | ||
360 | if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { | |
361 | ret = -EINVAL; | |
362 | goto out; | |
363 | } | |
364 | ||
365 | if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != | |
366 | (parsed_options & OCFS2_MOUNT_HB_LOCAL)) { | |
367 | ret = -EINVAL; | |
368 | mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); | |
369 | goto out; | |
370 | } | |
371 | ||
372 | if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != | |
373 | (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) { | |
374 | ret = -EINVAL; | |
375 | mlog(ML_ERROR, "Cannot change data mode on remount\n"); | |
376 | goto out; | |
377 | } | |
378 | ||
379 | /* We're going to/from readonly mode. */ | |
380 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { | |
381 | /* Lock here so the check of HARD_RO and the potential | |
382 | * setting of SOFT_RO is atomic. */ | |
383 | spin_lock(&osb->osb_lock); | |
384 | if (osb->osb_flags & OCFS2_OSB_HARD_RO) { | |
385 | mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); | |
386 | ret = -EROFS; | |
387 | goto unlock_osb; | |
388 | } | |
389 | ||
390 | if (*flags & MS_RDONLY) { | |
391 | mlog(0, "Going to ro mode.\n"); | |
392 | sb->s_flags |= MS_RDONLY; | |
393 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; | |
394 | } else { | |
395 | mlog(0, "Making ro filesystem writeable.\n"); | |
396 | ||
397 | if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { | |
398 | mlog(ML_ERROR, "Cannot remount RDWR " | |
399 | "filesystem due to previous errors.\n"); | |
400 | ret = -EROFS; | |
401 | goto unlock_osb; | |
402 | } | |
403 | incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); | |
404 | if (incompat_features) { | |
405 | mlog(ML_ERROR, "Cannot remount RDWR because " | |
406 | "of unsupported optional features " | |
407 | "(%x).\n", incompat_features); | |
408 | ret = -EINVAL; | |
409 | goto unlock_osb; | |
410 | } | |
411 | sb->s_flags &= ~MS_RDONLY; | |
412 | osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; | |
413 | } | |
414 | unlock_osb: | |
415 | spin_unlock(&osb->osb_lock); | |
416 | } | |
417 | ||
418 | if (!ret) { | |
419 | if (!ocfs2_is_hard_readonly(osb)) | |
420 | ocfs2_set_journal_params(osb); | |
421 | ||
422 | /* Only save off the new mount options in case of a successful | |
423 | * remount. */ | |
424 | osb->s_mount_opt = parsed_options; | |
425 | } | |
426 | out: | |
427 | return ret; | |
428 | } | |
429 | ||
430 | static int ocfs2_sb_probe(struct super_block *sb, | |
431 | struct buffer_head **bh, | |
432 | int *sector_size) | |
433 | { | |
434 | int status = 0, tmpstat; | |
435 | struct ocfs1_vol_disk_hdr *hdr; | |
436 | struct ocfs2_dinode *di; | |
437 | int blksize; | |
438 | ||
439 | *bh = NULL; | |
440 | ||
441 | /* may be > 512 */ | |
442 | *sector_size = bdev_hardsect_size(sb->s_bdev); | |
443 | if (*sector_size > OCFS2_MAX_BLOCKSIZE) { | |
444 | mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", | |
445 | *sector_size, OCFS2_MAX_BLOCKSIZE); | |
446 | status = -EINVAL; | |
447 | goto bail; | |
448 | } | |
449 | ||
450 | /* Can this really happen? */ | |
451 | if (*sector_size < OCFS2_MIN_BLOCKSIZE) | |
452 | *sector_size = OCFS2_MIN_BLOCKSIZE; | |
453 | ||
454 | /* check block zero for old format */ | |
455 | status = ocfs2_get_sector(sb, bh, 0, *sector_size); | |
456 | if (status < 0) { | |
457 | mlog_errno(status); | |
458 | goto bail; | |
459 | } | |
460 | hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; | |
461 | if (hdr->major_version == OCFS1_MAJOR_VERSION) { | |
462 | mlog(ML_ERROR, "incompatible version: %u.%u\n", | |
463 | hdr->major_version, hdr->minor_version); | |
464 | status = -EINVAL; | |
465 | } | |
466 | if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, | |
467 | strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { | |
468 | mlog(ML_ERROR, "incompatible volume signature: %8s\n", | |
469 | hdr->signature); | |
470 | status = -EINVAL; | |
471 | } | |
472 | brelse(*bh); | |
473 | *bh = NULL; | |
474 | if (status < 0) { | |
475 | mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " | |
476 | "upgraded before mounting with ocfs v2\n"); | |
477 | goto bail; | |
478 | } | |
479 | ||
480 | /* | |
481 | * Now check at magic offset for 512, 1024, 2048, 4096 | |
482 | * blocksizes. 4096 is the maximum blocksize because it is | |
483 | * the minimum clustersize. | |
484 | */ | |
485 | status = -EINVAL; | |
486 | for (blksize = *sector_size; | |
487 | blksize <= OCFS2_MAX_BLOCKSIZE; | |
488 | blksize <<= 1) { | |
489 | tmpstat = ocfs2_get_sector(sb, bh, | |
490 | OCFS2_SUPER_BLOCK_BLKNO, | |
491 | blksize); | |
492 | if (tmpstat < 0) { | |
493 | status = tmpstat; | |
494 | mlog_errno(status); | |
495 | goto bail; | |
496 | } | |
497 | di = (struct ocfs2_dinode *) (*bh)->b_data; | |
498 | status = ocfs2_verify_volume(di, *bh, blksize); | |
499 | if (status >= 0) | |
500 | goto bail; | |
501 | brelse(*bh); | |
502 | *bh = NULL; | |
503 | if (status != -EAGAIN) | |
504 | break; | |
505 | } | |
506 | ||
507 | bail: | |
508 | return status; | |
509 | } | |
510 | ||
511 | static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) | |
512 | { | |
513 | struct dentry *root; | |
514 | int status, sector_size; | |
515 | unsigned long parsed_opt; | |
516 | struct inode *inode = NULL; | |
517 | struct ocfs2_super *osb = NULL; | |
518 | struct buffer_head *bh = NULL; | |
519 | ||
520 | mlog_entry("%p, %p, %i", sb, data, silent); | |
521 | ||
522 | /* for now we only have one cluster/node, make sure we see it | |
523 | * in the heartbeat universe */ | |
524 | if (!o2hb_check_local_node_heartbeating()) { | |
525 | status = -EINVAL; | |
526 | goto read_super_error; | |
527 | } | |
528 | ||
529 | /* probe for superblock */ | |
530 | status = ocfs2_sb_probe(sb, &bh, §or_size); | |
531 | if (status < 0) { | |
532 | mlog(ML_ERROR, "superblock probe failed!\n"); | |
533 | goto read_super_error; | |
534 | } | |
535 | ||
536 | status = ocfs2_initialize_super(sb, bh, sector_size); | |
537 | osb = OCFS2_SB(sb); | |
538 | if (status < 0) { | |
539 | mlog_errno(status); | |
540 | goto read_super_error; | |
541 | } | |
542 | brelse(bh); | |
543 | bh = NULL; | |
544 | ||
545 | if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) { | |
546 | status = -EINVAL; | |
547 | goto read_super_error; | |
548 | } | |
549 | osb->s_mount_opt = parsed_opt; | |
550 | ||
551 | sb->s_magic = OCFS2_SUPER_MAGIC; | |
552 | ||
553 | /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, | |
554 | * heartbeat=none */ | |
555 | if (bdev_read_only(sb->s_bdev)) { | |
556 | if (!(sb->s_flags & MS_RDONLY)) { | |
557 | status = -EACCES; | |
558 | mlog(ML_ERROR, "Readonly device detected but readonly " | |
559 | "mount was not specified.\n"); | |
560 | goto read_super_error; | |
561 | } | |
562 | ||
563 | /* You should not be able to start a local heartbeat | |
564 | * on a readonly device. */ | |
565 | if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { | |
566 | status = -EROFS; | |
567 | mlog(ML_ERROR, "Local heartbeat specified on readonly " | |
568 | "device.\n"); | |
569 | goto read_super_error; | |
570 | } | |
571 | ||
572 | status = ocfs2_check_journals_nolocks(osb); | |
573 | if (status < 0) { | |
574 | if (status == -EROFS) | |
575 | mlog(ML_ERROR, "Recovery required on readonly " | |
576 | "file system, but write access is " | |
577 | "unavailable.\n"); | |
578 | else | |
579 | mlog_errno(status); | |
580 | goto read_super_error; | |
581 | } | |
582 | ||
583 | ocfs2_set_ro_flag(osb, 1); | |
584 | ||
585 | printk(KERN_NOTICE "Readonly device detected. No cluster " | |
586 | "services will be utilized for this mount. Recovery " | |
587 | "will be skipped.\n"); | |
588 | } | |
589 | ||
590 | if (!ocfs2_is_hard_readonly(osb)) { | |
591 | /* If this isn't a hard readonly mount, then we need | |
592 | * to make sure that heartbeat is in a valid state, | |
593 | * and that we mark ourselves soft readonly is -oro | |
594 | * was specified. */ | |
595 | if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { | |
596 | mlog(ML_ERROR, "No heartbeat for device (%s)\n", | |
597 | sb->s_id); | |
598 | status = -EINVAL; | |
599 | goto read_super_error; | |
600 | } | |
601 | ||
602 | if (sb->s_flags & MS_RDONLY) | |
603 | ocfs2_set_ro_flag(osb, 0); | |
604 | } | |
605 | ||
606 | osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, | |
607 | ocfs2_debugfs_root); | |
608 | if (!osb->osb_debug_root) { | |
609 | status = -EINVAL; | |
610 | mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); | |
611 | goto read_super_error; | |
612 | } | |
613 | ||
614 | status = ocfs2_mount_volume(sb); | |
615 | if (osb->root_inode) | |
616 | inode = igrab(osb->root_inode); | |
617 | ||
618 | if (status < 0) | |
619 | goto read_super_error; | |
620 | ||
621 | if (!inode) { | |
622 | status = -EIO; | |
623 | mlog_errno(status); | |
624 | goto read_super_error; | |
625 | } | |
626 | ||
627 | root = d_alloc_root(inode); | |
628 | if (!root) { | |
629 | status = -ENOMEM; | |
630 | mlog_errno(status); | |
631 | goto read_super_error; | |
632 | } | |
633 | ||
634 | sb->s_root = root; | |
635 | ||
636 | ocfs2_complete_mount_recovery(osb); | |
637 | ||
781ee3e2 SM |
638 | printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %d, slot %d) " |
639 | "with %s data mode.\n", | |
640 | osb->dev_str, osb->node_num, osb->slot_num, | |
ccd979bd MF |
641 | osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : |
642 | "ordered"); | |
643 | ||
644 | atomic_set(&osb->vol_state, VOLUME_MOUNTED); | |
645 | wake_up(&osb->osb_mount_event); | |
646 | ||
647 | mlog_exit(status); | |
648 | return status; | |
649 | ||
650 | read_super_error: | |
651 | if (bh != NULL) | |
652 | brelse(bh); | |
653 | ||
654 | if (inode) | |
655 | iput(inode); | |
656 | ||
657 | if (osb) { | |
658 | atomic_set(&osb->vol_state, VOLUME_DISABLED); | |
659 | wake_up(&osb->osb_mount_event); | |
660 | ocfs2_dismount_volume(sb, 1); | |
661 | } | |
662 | ||
663 | mlog_exit(status); | |
664 | return status; | |
665 | } | |
666 | ||
454e2398 DH |
667 | static int ocfs2_get_sb(struct file_system_type *fs_type, |
668 | int flags, | |
669 | const char *dev_name, | |
670 | void *data, | |
671 | struct vfsmount *mnt) | |
ccd979bd | 672 | { |
454e2398 DH |
673 | return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, |
674 | mnt); | |
ccd979bd MF |
675 | } |
676 | ||
677 | static struct file_system_type ocfs2_fs_type = { | |
678 | .owner = THIS_MODULE, | |
679 | .name = "ocfs2", | |
680 | .get_sb = ocfs2_get_sb, /* is this called when we mount | |
681 | * the fs? */ | |
682 | .kill_sb = kill_block_super, /* set to the generic one | |
683 | * right now, but do we | |
684 | * need to change that? */ | |
685 | .fs_flags = FS_REQUIRES_DEV, | |
686 | .next = NULL | |
687 | }; | |
688 | ||
689 | static int ocfs2_parse_options(struct super_block *sb, | |
690 | char *options, | |
691 | unsigned long *mount_opt, | |
692 | int is_remount) | |
693 | { | |
694 | int status; | |
695 | char *p; | |
696 | ||
697 | mlog_entry("remount: %d, options: \"%s\"\n", is_remount, | |
698 | options ? options : "(none)"); | |
699 | ||
700 | *mount_opt = 0; | |
701 | ||
702 | if (!options) { | |
703 | status = 1; | |
704 | goto bail; | |
705 | } | |
706 | ||
707 | while ((p = strsep(&options, ",")) != NULL) { | |
708 | int token, option; | |
709 | substring_t args[MAX_OPT_ARGS]; | |
710 | ||
711 | if (!*p) | |
712 | continue; | |
713 | ||
714 | token = match_token(p, tokens, args); | |
715 | switch (token) { | |
716 | case Opt_hb_local: | |
717 | *mount_opt |= OCFS2_MOUNT_HB_LOCAL; | |
718 | break; | |
719 | case Opt_hb_none: | |
720 | *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; | |
721 | break; | |
722 | case Opt_barrier: | |
723 | if (match_int(&args[0], &option)) { | |
724 | status = 0; | |
725 | goto bail; | |
726 | } | |
727 | if (option) | |
728 | *mount_opt |= OCFS2_MOUNT_BARRIER; | |
729 | else | |
730 | *mount_opt &= ~OCFS2_MOUNT_BARRIER; | |
731 | break; | |
732 | case Opt_intr: | |
733 | *mount_opt &= ~OCFS2_MOUNT_NOINTR; | |
734 | break; | |
735 | case Opt_nointr: | |
736 | *mount_opt |= OCFS2_MOUNT_NOINTR; | |
737 | break; | |
738 | case Opt_err_panic: | |
739 | *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; | |
740 | break; | |
741 | case Opt_err_ro: | |
742 | *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; | |
743 | break; | |
744 | case Opt_data_ordered: | |
745 | *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; | |
746 | break; | |
747 | case Opt_data_writeback: | |
748 | *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; | |
749 | break; | |
750 | default: | |
751 | mlog(ML_ERROR, | |
752 | "Unrecognized mount option \"%s\" " | |
753 | "or missing value\n", p); | |
754 | status = 0; | |
755 | goto bail; | |
756 | } | |
757 | } | |
758 | ||
759 | status = 1; | |
760 | ||
761 | bail: | |
762 | mlog_exit(status); | |
763 | return status; | |
764 | } | |
765 | ||
766 | static int __init ocfs2_init(void) | |
767 | { | |
768 | int status; | |
769 | ||
770 | mlog_entry_void(); | |
771 | ||
772 | ocfs2_print_version(); | |
773 | ||
774 | if (init_ocfs2_extent_maps()) | |
775 | return -ENOMEM; | |
776 | ||
777 | status = init_ocfs2_uptodate_cache(); | |
778 | if (status < 0) { | |
779 | mlog_errno(status); | |
780 | goto leave; | |
781 | } | |
782 | ||
783 | status = ocfs2_initialize_mem_caches(); | |
784 | if (status < 0) { | |
785 | mlog_errno(status); | |
786 | goto leave; | |
787 | } | |
788 | ||
789 | ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); | |
790 | if (!ocfs2_wq) { | |
791 | status = -ENOMEM; | |
792 | goto leave; | |
793 | } | |
794 | ||
ccd979bd MF |
795 | ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); |
796 | if (!ocfs2_debugfs_root) { | |
797 | status = -EFAULT; | |
798 | mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); | |
799 | } | |
800 | ||
801 | leave: | |
802 | if (status < 0) { | |
803 | ocfs2_free_mem_caches(); | |
804 | exit_ocfs2_uptodate_cache(); | |
805 | exit_ocfs2_extent_maps(); | |
806 | } | |
807 | ||
808 | mlog_exit(status); | |
809 | ||
810 | if (status >= 0) { | |
811 | return register_filesystem(&ocfs2_fs_type); | |
812 | } else | |
813 | return -1; | |
814 | } | |
815 | ||
816 | static void __exit ocfs2_exit(void) | |
817 | { | |
818 | mlog_entry_void(); | |
819 | ||
820 | if (ocfs2_wq) { | |
821 | flush_workqueue(ocfs2_wq); | |
822 | destroy_workqueue(ocfs2_wq); | |
823 | } | |
824 | ||
825 | debugfs_remove(ocfs2_debugfs_root); | |
826 | ||
827 | ocfs2_free_mem_caches(); | |
828 | ||
829 | unregister_filesystem(&ocfs2_fs_type); | |
830 | ||
831 | exit_ocfs2_extent_maps(); | |
832 | ||
833 | exit_ocfs2_uptodate_cache(); | |
834 | ||
835 | mlog_exit_void(); | |
836 | } | |
837 | ||
838 | static void ocfs2_put_super(struct super_block *sb) | |
839 | { | |
840 | mlog_entry("(0x%p)\n", sb); | |
841 | ||
842 | ocfs2_sync_blockdev(sb); | |
843 | ocfs2_dismount_volume(sb, 0); | |
844 | ||
845 | mlog_exit_void(); | |
846 | } | |
847 | ||
726c3342 | 848 | static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) |
ccd979bd MF |
849 | { |
850 | struct ocfs2_super *osb; | |
851 | u32 numbits, freebits; | |
852 | int status; | |
853 | struct ocfs2_dinode *bm_lock; | |
854 | struct buffer_head *bh = NULL; | |
855 | struct inode *inode = NULL; | |
856 | ||
726c3342 | 857 | mlog_entry("(%p, %p)\n", dentry->d_sb, buf); |
ccd979bd | 858 | |
726c3342 | 859 | osb = OCFS2_SB(dentry->d_sb); |
ccd979bd MF |
860 | |
861 | inode = ocfs2_get_system_file_inode(osb, | |
862 | GLOBAL_BITMAP_SYSTEM_INODE, | |
863 | OCFS2_INVALID_SLOT); | |
864 | if (!inode) { | |
865 | mlog(ML_ERROR, "failed to get bitmap inode\n"); | |
866 | status = -EIO; | |
867 | goto bail; | |
868 | } | |
869 | ||
870 | status = ocfs2_meta_lock(inode, NULL, &bh, 0); | |
871 | if (status < 0) { | |
872 | mlog_errno(status); | |
873 | goto bail; | |
874 | } | |
875 | ||
876 | bm_lock = (struct ocfs2_dinode *) bh->b_data; | |
877 | ||
878 | numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); | |
879 | freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); | |
880 | ||
881 | buf->f_type = OCFS2_SUPER_MAGIC; | |
726c3342 | 882 | buf->f_bsize = dentry->d_sb->s_blocksize; |
ccd979bd MF |
883 | buf->f_namelen = OCFS2_MAX_FILENAME_LEN; |
884 | buf->f_blocks = ((sector_t) numbits) * | |
885 | (osb->s_clustersize >> osb->sb->s_blocksize_bits); | |
886 | buf->f_bfree = ((sector_t) freebits) * | |
887 | (osb->s_clustersize >> osb->sb->s_blocksize_bits); | |
888 | buf->f_bavail = buf->f_bfree; | |
889 | buf->f_files = numbits; | |
890 | buf->f_ffree = freebits; | |
891 | ||
892 | brelse(bh); | |
893 | ||
894 | ocfs2_meta_unlock(inode, 0); | |
895 | status = 0; | |
896 | bail: | |
897 | if (inode) | |
898 | iput(inode); | |
899 | ||
900 | mlog_exit(status); | |
901 | ||
902 | return status; | |
903 | } | |
904 | ||
905 | static void ocfs2_inode_init_once(void *data, | |
906 | kmem_cache_t *cachep, | |
907 | unsigned long flags) | |
908 | { | |
909 | struct ocfs2_inode_info *oi = data; | |
910 | ||
911 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
912 | SLAB_CTOR_CONSTRUCTOR) { | |
913 | oi->ip_flags = 0; | |
914 | oi->ip_open_count = 0; | |
915 | spin_lock_init(&oi->ip_lock); | |
916 | ocfs2_extent_map_init(&oi->vfs_inode); | |
917 | INIT_LIST_HEAD(&oi->ip_handle_list); | |
918 | INIT_LIST_HEAD(&oi->ip_io_markers); | |
919 | oi->ip_handle = NULL; | |
920 | oi->ip_created_trans = 0; | |
921 | oi->ip_last_trans = 0; | |
922 | oi->ip_dir_start_lookup = 0; | |
923 | ||
924 | init_rwsem(&oi->ip_alloc_sem); | |
251b6ecc | 925 | mutex_init(&oi->ip_io_mutex); |
ccd979bd MF |
926 | |
927 | oi->ip_blkno = 0ULL; | |
928 | oi->ip_clusters = 0; | |
929 | ||
930 | ocfs2_lock_res_init_once(&oi->ip_rw_lockres); | |
931 | ocfs2_lock_res_init_once(&oi->ip_meta_lockres); | |
932 | ocfs2_lock_res_init_once(&oi->ip_data_lockres); | |
933 | ||
934 | ocfs2_metadata_cache_init(&oi->vfs_inode); | |
935 | ||
936 | inode_init_once(&oi->vfs_inode); | |
937 | } | |
938 | } | |
939 | ||
940 | static int ocfs2_initialize_mem_caches(void) | |
941 | { | |
942 | ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", | |
fffb60f9 PJ |
943 | sizeof(struct ocfs2_inode_info), |
944 | 0, | |
945 | (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| | |
946 | SLAB_MEM_SPREAD), | |
947 | ocfs2_inode_init_once, NULL); | |
ccd979bd MF |
948 | if (!ocfs2_inode_cachep) |
949 | return -ENOMEM; | |
950 | ||
951 | ocfs2_lock_cache = kmem_cache_create("ocfs2_lock", | |
952 | sizeof(struct ocfs2_journal_lock), | |
953 | 0, | |
ac2b898c | 954 | SLAB_HWCACHE_ALIGN, |
ccd979bd MF |
955 | NULL, NULL); |
956 | if (!ocfs2_lock_cache) | |
957 | return -ENOMEM; | |
958 | ||
959 | return 0; | |
960 | } | |
961 | ||
962 | static void ocfs2_free_mem_caches(void) | |
963 | { | |
964 | if (ocfs2_inode_cachep) | |
965 | kmem_cache_destroy(ocfs2_inode_cachep); | |
966 | if (ocfs2_lock_cache) | |
967 | kmem_cache_destroy(ocfs2_lock_cache); | |
968 | ||
969 | ocfs2_inode_cachep = NULL; | |
970 | ocfs2_lock_cache = NULL; | |
971 | } | |
972 | ||
973 | static int ocfs2_get_sector(struct super_block *sb, | |
974 | struct buffer_head **bh, | |
975 | int block, | |
976 | int sect_size) | |
977 | { | |
978 | if (!sb_set_blocksize(sb, sect_size)) { | |
979 | mlog(ML_ERROR, "unable to set blocksize\n"); | |
980 | return -EIO; | |
981 | } | |
982 | ||
983 | *bh = sb_getblk(sb, block); | |
984 | if (!*bh) { | |
985 | mlog_errno(-EIO); | |
986 | return -EIO; | |
987 | } | |
988 | lock_buffer(*bh); | |
989 | if (!buffer_dirty(*bh)) | |
990 | clear_buffer_uptodate(*bh); | |
991 | unlock_buffer(*bh); | |
992 | ll_rw_block(READ, 1, bh); | |
993 | wait_on_buffer(*bh); | |
994 | return 0; | |
995 | } | |
996 | ||
997 | /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ | |
998 | static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) | |
999 | { | |
1000 | int status; | |
1001 | ||
1002 | /* XXX hold a ref on the node while mounte? easy enough, if | |
1003 | * desirable. */ | |
1004 | osb->node_num = o2nm_this_node(); | |
1005 | if (osb->node_num == O2NM_MAX_NODES) { | |
1006 | mlog(ML_ERROR, "could not find this host's node number\n"); | |
1007 | status = -ENOENT; | |
1008 | goto bail; | |
1009 | } | |
1010 | ||
781ee3e2 | 1011 | mlog(0, "I am node %d\n", osb->node_num); |
ccd979bd MF |
1012 | |
1013 | status = 0; | |
1014 | bail: | |
1015 | return status; | |
1016 | } | |
1017 | ||
1018 | static int ocfs2_mount_volume(struct super_block *sb) | |
1019 | { | |
1020 | int status = 0; | |
1021 | int unlock_super = 0; | |
1022 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1023 | ||
1024 | mlog_entry_void(); | |
1025 | ||
1026 | if (ocfs2_is_hard_readonly(osb)) | |
1027 | goto leave; | |
1028 | ||
1029 | status = ocfs2_fill_local_node_info(osb); | |
1030 | if (status < 0) { | |
1031 | mlog_errno(status); | |
1032 | goto leave; | |
1033 | } | |
1034 | ||
1035 | status = ocfs2_register_hb_callbacks(osb); | |
1036 | if (status < 0) { | |
1037 | mlog_errno(status); | |
1038 | goto leave; | |
1039 | } | |
1040 | ||
1041 | status = ocfs2_dlm_init(osb); | |
1042 | if (status < 0) { | |
1043 | mlog_errno(status); | |
1044 | goto leave; | |
1045 | } | |
1046 | ||
1047 | /* requires vote_thread to be running. */ | |
1048 | status = ocfs2_register_net_handlers(osb); | |
1049 | if (status < 0) { | |
1050 | mlog_errno(status); | |
1051 | goto leave; | |
1052 | } | |
1053 | ||
1054 | status = ocfs2_super_lock(osb, 1); | |
1055 | if (status < 0) { | |
1056 | mlog_errno(status); | |
1057 | goto leave; | |
1058 | } | |
1059 | unlock_super = 1; | |
1060 | ||
1061 | /* This will load up the node map and add ourselves to it. */ | |
1062 | status = ocfs2_find_slot(osb); | |
1063 | if (status < 0) { | |
1064 | mlog_errno(status); | |
1065 | goto leave; | |
1066 | } | |
1067 | ||
1068 | ocfs2_populate_mounted_map(osb); | |
1069 | ||
1070 | /* load all node-local system inodes */ | |
1071 | status = ocfs2_init_local_system_inodes(osb); | |
1072 | if (status < 0) { | |
1073 | mlog_errno(status); | |
1074 | goto leave; | |
1075 | } | |
1076 | ||
1077 | status = ocfs2_check_volume(osb); | |
1078 | if (status < 0) { | |
1079 | mlog_errno(status); | |
1080 | goto leave; | |
1081 | } | |
1082 | ||
1083 | status = ocfs2_truncate_log_init(osb); | |
1084 | if (status < 0) { | |
1085 | mlog_errno(status); | |
1086 | goto leave; | |
1087 | } | |
1088 | ||
1089 | /* This should be sent *after* we recovered our journal as it | |
1090 | * will cause other nodes to unmark us as needing | |
1091 | * recovery. However, we need to send it *before* dropping the | |
1092 | * super block lock as otherwise their recovery threads might | |
1093 | * try to clean us up while we're live! */ | |
1094 | status = ocfs2_request_mount_vote(osb); | |
1095 | if (status < 0) | |
1096 | mlog_errno(status); | |
1097 | ||
1098 | leave: | |
1099 | if (unlock_super) | |
1100 | ocfs2_super_unlock(osb, 1); | |
1101 | ||
1102 | mlog_exit(status); | |
1103 | return status; | |
1104 | } | |
1105 | ||
1106 | /* we can't grab the goofy sem lock from inside wait_event, so we use | |
1107 | * memory barriers to make sure that we'll see the null task before | |
1108 | * being woken up */ | |
1109 | static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) | |
1110 | { | |
1111 | mb(); | |
1112 | return osb->recovery_thread_task != NULL; | |
1113 | } | |
1114 | ||
1115 | static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) | |
1116 | { | |
1117 | int tmp; | |
1118 | struct ocfs2_super *osb = NULL; | |
1119 | ||
1120 | mlog_entry("(0x%p)\n", sb); | |
1121 | ||
1122 | BUG_ON(!sb); | |
1123 | osb = OCFS2_SB(sb); | |
1124 | BUG_ON(!osb); | |
1125 | ||
1126 | ocfs2_shutdown_local_alloc(osb); | |
1127 | ||
1128 | ocfs2_truncate_log_shutdown(osb); | |
1129 | ||
1130 | /* disable any new recovery threads and wait for any currently | |
1131 | * running ones to exit. Do this before setting the vol_state. */ | |
c74ec2f7 | 1132 | mutex_lock(&osb->recovery_lock); |
ccd979bd | 1133 | osb->disable_recovery = 1; |
c74ec2f7 | 1134 | mutex_unlock(&osb->recovery_lock); |
ccd979bd MF |
1135 | wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); |
1136 | ||
1137 | /* At this point, we know that no more recovery threads can be | |
1138 | * launched, so wait for any recovery completion work to | |
1139 | * complete. */ | |
1140 | flush_workqueue(ocfs2_wq); | |
1141 | ||
1142 | ocfs2_journal_shutdown(osb); | |
1143 | ||
1144 | ocfs2_sync_blockdev(sb); | |
1145 | ||
1146 | /* No dlm means we've failed during mount, so skip all the | |
1147 | * steps which depended on that to complete. */ | |
1148 | if (osb->dlm) { | |
1149 | tmp = ocfs2_super_lock(osb, 1); | |
1150 | if (tmp < 0) { | |
1151 | mlog_errno(tmp); | |
1152 | return; | |
1153 | } | |
1154 | ||
1155 | tmp = ocfs2_request_umount_vote(osb); | |
1156 | if (tmp < 0) | |
1157 | mlog_errno(tmp); | |
1158 | ||
1159 | if (osb->slot_num != OCFS2_INVALID_SLOT) | |
1160 | ocfs2_put_slot(osb); | |
1161 | ||
1162 | ocfs2_super_unlock(osb, 1); | |
1163 | } | |
1164 | ||
1165 | ocfs2_release_system_inodes(osb); | |
1166 | ||
1167 | if (osb->dlm) { | |
1168 | ocfs2_unregister_net_handlers(osb); | |
1169 | ||
1170 | ocfs2_dlm_shutdown(osb); | |
1171 | } | |
1172 | ||
1173 | ocfs2_clear_hb_callbacks(osb); | |
1174 | ||
1175 | debugfs_remove(osb->osb_debug_root); | |
1176 | ||
1177 | if (!mnt_err) | |
1178 | ocfs2_stop_heartbeat(osb); | |
1179 | ||
1180 | atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); | |
1181 | ||
781ee3e2 SM |
1182 | printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %d)\n", |
1183 | osb->dev_str, osb->node_num); | |
ccd979bd MF |
1184 | |
1185 | ocfs2_delete_osb(osb); | |
1186 | kfree(osb); | |
1187 | sb->s_dev = 0; | |
1188 | sb->s_fs_info = NULL; | |
1189 | } | |
1190 | ||
1191 | static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, | |
1192 | unsigned uuid_bytes) | |
1193 | { | |
1194 | int i, ret; | |
1195 | char *ptr; | |
1196 | ||
1197 | BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); | |
1198 | ||
1199 | osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); | |
1200 | if (osb->uuid_str == NULL) | |
1201 | return -ENOMEM; | |
1202 | ||
ccd979bd MF |
1203 | for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { |
1204 | /* print with null */ | |
1205 | ret = snprintf(ptr, 3, "%02X", uuid[i]); | |
1206 | if (ret != 2) /* drop super cleans up */ | |
1207 | return -EINVAL; | |
1208 | /* then only advance past the last char */ | |
1209 | ptr += 2; | |
1210 | } | |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static int ocfs2_initialize_super(struct super_block *sb, | |
1216 | struct buffer_head *bh, | |
1217 | int sector_size) | |
1218 | { | |
1219 | int status = 0; | |
1220 | int i; | |
1221 | struct ocfs2_dinode *di = NULL; | |
1222 | struct inode *inode = NULL; | |
1223 | struct buffer_head *bitmap_bh = NULL; | |
1224 | struct ocfs2_journal *journal; | |
1225 | __le32 uuid_net_key; | |
1226 | struct ocfs2_super *osb; | |
1227 | ||
1228 | mlog_entry_void(); | |
1229 | ||
1230 | osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL); | |
1231 | if (!osb) { | |
1232 | status = -ENOMEM; | |
1233 | mlog_errno(status); | |
1234 | goto bail; | |
1235 | } | |
1236 | ||
1237 | sb->s_fs_info = osb; | |
1238 | sb->s_op = &ocfs2_sops; | |
1239 | sb->s_export_op = &ocfs2_export_ops; | |
1240 | sb->s_flags |= MS_NOATIME; | |
1241 | /* this is needed to support O_LARGEFILE */ | |
1242 | sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits); | |
1243 | ||
1244 | osb->sb = sb; | |
1245 | /* Save off for ocfs2_rw_direct */ | |
1246 | osb->s_sectsize_bits = blksize_bits(sector_size); | |
ebdec83b | 1247 | BUG_ON(!osb->s_sectsize_bits); |
ccd979bd MF |
1248 | |
1249 | osb->net_response_ids = 0; | |
1250 | spin_lock_init(&osb->net_response_lock); | |
1251 | INIT_LIST_HEAD(&osb->net_response_list); | |
1252 | ||
1253 | INIT_LIST_HEAD(&osb->osb_net_handlers); | |
1254 | init_waitqueue_head(&osb->recovery_event); | |
1255 | spin_lock_init(&osb->vote_task_lock); | |
1256 | init_waitqueue_head(&osb->vote_event); | |
1257 | osb->vote_work_sequence = 0; | |
1258 | osb->vote_wake_sequence = 0; | |
1259 | INIT_LIST_HEAD(&osb->blocked_lock_list); | |
1260 | osb->blocked_lock_count = 0; | |
1261 | INIT_LIST_HEAD(&osb->vote_list); | |
1262 | spin_lock_init(&osb->osb_lock); | |
1263 | ||
1264 | atomic_set(&osb->alloc_stats.moves, 0); | |
1265 | atomic_set(&osb->alloc_stats.local_data, 0); | |
1266 | atomic_set(&osb->alloc_stats.bitmap_data, 0); | |
1267 | atomic_set(&osb->alloc_stats.bg_allocs, 0); | |
1268 | atomic_set(&osb->alloc_stats.bg_extends, 0); | |
1269 | ||
1270 | ocfs2_init_node_maps(osb); | |
1271 | ||
1272 | snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", | |
1273 | MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); | |
1274 | ||
c74ec2f7 | 1275 | mutex_init(&osb->recovery_lock); |
ccd979bd MF |
1276 | |
1277 | osb->disable_recovery = 0; | |
1278 | osb->recovery_thread_task = NULL; | |
1279 | ||
1280 | init_waitqueue_head(&osb->checkpoint_event); | |
1281 | atomic_set(&osb->needs_checkpoint, 0); | |
1282 | ||
1283 | osb->node_num = O2NM_INVALID_NODE_NUM; | |
1284 | osb->slot_num = OCFS2_INVALID_SLOT; | |
1285 | ||
1286 | osb->local_alloc_state = OCFS2_LA_UNUSED; | |
1287 | osb->local_alloc_bh = NULL; | |
1288 | ||
1289 | ocfs2_setup_hb_callbacks(osb); | |
1290 | ||
1291 | init_waitqueue_head(&osb->osb_mount_event); | |
1292 | ||
1293 | osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); | |
1294 | if (!osb->vol_label) { | |
1295 | mlog(ML_ERROR, "unable to alloc vol label\n"); | |
1296 | status = -ENOMEM; | |
1297 | goto bail; | |
1298 | } | |
1299 | ||
ccd979bd MF |
1300 | di = (struct ocfs2_dinode *)bh->b_data; |
1301 | ||
1302 | osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); | |
1303 | if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { | |
1304 | mlog(ML_ERROR, "Invalid number of node slots (%u)\n", | |
1305 | osb->max_slots); | |
1306 | status = -EINVAL; | |
1307 | goto bail; | |
1308 | } | |
781ee3e2 | 1309 | mlog(0, "max_slots for this device: %u\n", osb->max_slots); |
ccd979bd | 1310 | |
b4df6ed8 MF |
1311 | init_waitqueue_head(&osb->osb_wipe_event); |
1312 | osb->osb_orphan_wipes = kcalloc(osb->max_slots, | |
1313 | sizeof(*osb->osb_orphan_wipes), | |
1314 | GFP_KERNEL); | |
1315 | if (!osb->osb_orphan_wipes) { | |
1316 | status = -ENOMEM; | |
1317 | mlog_errno(status); | |
1318 | goto bail; | |
1319 | } | |
1320 | ||
ccd979bd MF |
1321 | osb->s_feature_compat = |
1322 | le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); | |
1323 | osb->s_feature_ro_compat = | |
1324 | le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); | |
1325 | osb->s_feature_incompat = | |
1326 | le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); | |
1327 | ||
1328 | if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { | |
1329 | mlog(ML_ERROR, "couldn't mount because of unsupported " | |
1330 | "optional features (%x).\n", i); | |
1331 | status = -EINVAL; | |
1332 | goto bail; | |
1333 | } | |
1334 | if (!(osb->sb->s_flags & MS_RDONLY) && | |
1335 | (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { | |
1336 | mlog(ML_ERROR, "couldn't mount RDWR because of " | |
1337 | "unsupported optional features (%x).\n", i); | |
1338 | status = -EINVAL; | |
1339 | goto bail; | |
1340 | } | |
1341 | ||
1342 | get_random_bytes(&osb->s_next_generation, sizeof(u32)); | |
1343 | ||
1344 | /* FIXME | |
1345 | * This should be done in ocfs2_journal_init(), but unknown | |
1346 | * ordering issues will cause the filesystem to crash. | |
1347 | * If anyone wants to figure out what part of the code | |
1348 | * refers to osb->journal before ocfs2_journal_init() is run, | |
1349 | * be my guest. | |
1350 | */ | |
1351 | /* initialize our journal structure */ | |
1352 | ||
1353 | journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL); | |
1354 | if (!journal) { | |
1355 | mlog(ML_ERROR, "unable to alloc journal\n"); | |
1356 | status = -ENOMEM; | |
1357 | goto bail; | |
1358 | } | |
1359 | osb->journal = journal; | |
1360 | journal->j_osb = osb; | |
1361 | ||
1362 | atomic_set(&journal->j_num_trans, 0); | |
1363 | init_rwsem(&journal->j_trans_barrier); | |
1364 | init_waitqueue_head(&journal->j_checkpointed); | |
1365 | spin_lock_init(&journal->j_lock); | |
1366 | journal->j_trans_id = (unsigned long) 1; | |
1367 | INIT_LIST_HEAD(&journal->j_la_cleanups); | |
1368 | INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb); | |
1369 | journal->j_state = OCFS2_JOURNAL_FREE; | |
1370 | ||
1371 | /* get some pseudo constants for clustersize bits */ | |
1372 | osb->s_clustersize_bits = | |
1373 | le32_to_cpu(di->id2.i_super.s_clustersize_bits); | |
1374 | osb->s_clustersize = 1 << osb->s_clustersize_bits; | |
1375 | mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); | |
1376 | ||
1377 | if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || | |
1378 | osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { | |
1379 | mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", | |
1380 | osb->s_clustersize); | |
1381 | status = -EINVAL; | |
1382 | goto bail; | |
1383 | } | |
1384 | ||
1385 | if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) | |
1386 | > (u32)~0UL) { | |
1387 | mlog(ML_ERROR, "Volume might try to write to blocks beyond " | |
1388 | "what jbd can address in 32 bits.\n"); | |
1389 | status = -EINVAL; | |
1390 | goto bail; | |
1391 | } | |
1392 | ||
1393 | if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, | |
1394 | sizeof(di->id2.i_super.s_uuid))) { | |
1395 | mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); | |
1396 | status = -ENOMEM; | |
1397 | goto bail; | |
1398 | } | |
1399 | ||
78427043 | 1400 | memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); |
ccd979bd MF |
1401 | osb->net_key = le32_to_cpu(uuid_net_key); |
1402 | ||
1403 | strncpy(osb->vol_label, di->id2.i_super.s_label, 63); | |
1404 | osb->vol_label[63] = '\0'; | |
1405 | osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); | |
1406 | osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); | |
1407 | osb->first_cluster_group_blkno = | |
1408 | le64_to_cpu(di->id2.i_super.s_first_cluster_group); | |
1409 | osb->fs_generation = le32_to_cpu(di->i_fs_generation); | |
1410 | mlog(0, "vol_label: %s\n", osb->vol_label); | |
1411 | mlog(0, "uuid: %s\n", osb->uuid_str); | |
b0697053 MF |
1412 | mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", |
1413 | (unsigned long long)osb->root_blkno, | |
1414 | (unsigned long long)osb->system_dir_blkno); | |
ccd979bd MF |
1415 | |
1416 | osb->osb_dlm_debug = ocfs2_new_dlm_debug(); | |
1417 | if (!osb->osb_dlm_debug) { | |
1418 | status = -ENOMEM; | |
1419 | mlog_errno(status); | |
1420 | goto bail; | |
1421 | } | |
1422 | ||
1423 | atomic_set(&osb->vol_state, VOLUME_INIT); | |
1424 | ||
1425 | /* load root, system_dir, and all global system inodes */ | |
1426 | status = ocfs2_init_global_system_inodes(osb); | |
1427 | if (status < 0) { | |
1428 | mlog_errno(status); | |
1429 | goto bail; | |
1430 | } | |
1431 | ||
1432 | /* | |
1433 | * global bitmap | |
1434 | */ | |
1435 | inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, | |
1436 | OCFS2_INVALID_SLOT); | |
1437 | if (!inode) { | |
1438 | status = -EINVAL; | |
1439 | mlog_errno(status); | |
1440 | goto bail; | |
1441 | } | |
1442 | ||
1443 | osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; | |
1444 | ||
101ebf25 MF |
1445 | /* We don't have a cluster lock on the bitmap here because |
1446 | * we're only interested in static information and the extra | |
1447 | * complexity at mount time isn't worht it. Don't pass the | |
1448 | * inode in to the read function though as we don't want it to | |
1449 | * be put in the cache. */ | |
ccd979bd | 1450 | status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0, |
101ebf25 | 1451 | NULL); |
ccd979bd MF |
1452 | iput(inode); |
1453 | if (status < 0) { | |
1454 | mlog_errno(status); | |
1455 | goto bail; | |
1456 | } | |
1457 | ||
1458 | di = (struct ocfs2_dinode *) bitmap_bh->b_data; | |
1459 | osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg); | |
ccd979bd | 1460 | brelse(bitmap_bh); |
b0697053 MF |
1461 | mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n", |
1462 | (unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg); | |
ccd979bd MF |
1463 | |
1464 | status = ocfs2_init_slot_info(osb); | |
1465 | if (status < 0) { | |
1466 | mlog_errno(status); | |
1467 | goto bail; | |
1468 | } | |
1469 | ||
ccd979bd MF |
1470 | bail: |
1471 | mlog_exit(status); | |
1472 | return status; | |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * will return: -EAGAIN if it is ok to keep searching for superblocks | |
1477 | * -EINVAL if there is a bad superblock | |
1478 | * 0 on success | |
1479 | */ | |
1480 | static int ocfs2_verify_volume(struct ocfs2_dinode *di, | |
1481 | struct buffer_head *bh, | |
1482 | u32 blksz) | |
1483 | { | |
1484 | int status = -EAGAIN; | |
1485 | ||
1486 | mlog_entry_void(); | |
1487 | ||
1488 | if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, | |
1489 | strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { | |
1490 | status = -EINVAL; | |
1491 | if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { | |
1492 | mlog(ML_ERROR, "found superblock with incorrect block " | |
1493 | "size: found %u, should be %u\n", | |
1494 | 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), | |
1495 | blksz); | |
1496 | } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != | |
1497 | OCFS2_MAJOR_REV_LEVEL || | |
1498 | le16_to_cpu(di->id2.i_super.s_minor_rev_level) != | |
1499 | OCFS2_MINOR_REV_LEVEL) { | |
1500 | mlog(ML_ERROR, "found superblock with bad version: " | |
1501 | "found %u.%u, should be %u.%u\n", | |
1502 | le16_to_cpu(di->id2.i_super.s_major_rev_level), | |
1503 | le16_to_cpu(di->id2.i_super.s_minor_rev_level), | |
1504 | OCFS2_MAJOR_REV_LEVEL, | |
1505 | OCFS2_MINOR_REV_LEVEL); | |
1506 | } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { | |
1507 | mlog(ML_ERROR, "bad block number on superblock: " | |
b0697053 MF |
1508 | "found %llu, should be %llu\n", |
1509 | (unsigned long long)di->i_blkno, | |
1510 | (unsigned long long)bh->b_blocknr); | |
ccd979bd MF |
1511 | } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || |
1512 | le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { | |
1513 | mlog(ML_ERROR, "bad cluster size found: %u\n", | |
1514 | 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); | |
1515 | } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { | |
1516 | mlog(ML_ERROR, "bad root_blkno: 0\n"); | |
1517 | } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { | |
1518 | mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); | |
1519 | } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { | |
1520 | mlog(ML_ERROR, | |
1521 | "Superblock slots found greater than file system " | |
1522 | "maximum: found %u, max %u\n", | |
1523 | le16_to_cpu(di->id2.i_super.s_max_slots), | |
1524 | OCFS2_MAX_SLOTS); | |
1525 | } else { | |
1526 | /* found it! */ | |
1527 | status = 0; | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | mlog_exit(status); | |
1532 | return status; | |
1533 | } | |
1534 | ||
1535 | static int ocfs2_check_volume(struct ocfs2_super *osb) | |
1536 | { | |
1537 | int status = 0; | |
1538 | int dirty; | |
1539 | struct ocfs2_dinode *local_alloc = NULL; /* only used if we | |
1540 | * recover | |
1541 | * ourselves. */ | |
1542 | ||
1543 | mlog_entry_void(); | |
1544 | ||
1545 | /* Init our journal object. */ | |
1546 | status = ocfs2_journal_init(osb->journal, &dirty); | |
1547 | if (status < 0) { | |
1548 | mlog(ML_ERROR, "Could not initialize journal!\n"); | |
1549 | goto finally; | |
1550 | } | |
1551 | ||
1552 | /* If the journal was unmounted cleanly then we don't want to | |
1553 | * recover anything. Otherwise, journal_load will do that | |
1554 | * dirty work for us :) */ | |
1555 | if (!dirty) { | |
1556 | status = ocfs2_journal_wipe(osb->journal, 0); | |
1557 | if (status < 0) { | |
1558 | mlog_errno(status); | |
1559 | goto finally; | |
1560 | } | |
1561 | } else { | |
1562 | mlog(ML_NOTICE, "File system was not unmounted cleanly, " | |
1563 | "recovering volume.\n"); | |
1564 | } | |
1565 | ||
1566 | /* will play back anything left in the journal. */ | |
1567 | ocfs2_journal_load(osb->journal); | |
1568 | ||
1569 | if (dirty) { | |
1570 | /* recover my local alloc if we didn't unmount cleanly. */ | |
1571 | status = ocfs2_begin_local_alloc_recovery(osb, | |
1572 | osb->slot_num, | |
1573 | &local_alloc); | |
1574 | if (status < 0) { | |
1575 | mlog_errno(status); | |
1576 | goto finally; | |
1577 | } | |
1578 | /* we complete the recovery process after we've marked | |
1579 | * ourselves as mounted. */ | |
1580 | } | |
1581 | ||
1582 | mlog(0, "Journal loaded.\n"); | |
1583 | ||
1584 | status = ocfs2_load_local_alloc(osb); | |
1585 | if (status < 0) { | |
1586 | mlog_errno(status); | |
1587 | goto finally; | |
1588 | } | |
1589 | ||
1590 | if (dirty) { | |
1591 | /* Recovery will be completed after we've mounted the | |
1592 | * rest of the volume. */ | |
1593 | osb->dirty = 1; | |
1594 | osb->local_alloc_copy = local_alloc; | |
1595 | local_alloc = NULL; | |
1596 | } | |
1597 | ||
1598 | /* go through each journal, trylock it and if you get the | |
1599 | * lock, and it's marked as dirty, set the bit in the recover | |
1600 | * map and launch a recovery thread for it. */ | |
1601 | status = ocfs2_mark_dead_nodes(osb); | |
1602 | if (status < 0) | |
1603 | mlog_errno(status); | |
1604 | ||
1605 | finally: | |
1606 | if (local_alloc) | |
1607 | kfree(local_alloc); | |
1608 | ||
1609 | mlog_exit(status); | |
1610 | return status; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * The routine gets called from dismount or close whenever a dismount on | |
1615 | * volume is requested and the osb open count becomes 1. | |
1616 | * It will remove the osb from the global list and also free up all the | |
1617 | * initialized resources and fileobject. | |
1618 | */ | |
1619 | static void ocfs2_delete_osb(struct ocfs2_super *osb) | |
1620 | { | |
1621 | mlog_entry_void(); | |
1622 | ||
1623 | /* This function assumes that the caller has the main osb resource */ | |
1624 | ||
1625 | if (osb->slot_info) | |
1626 | ocfs2_free_slot_info(osb->slot_info); | |
1627 | ||
b4df6ed8 | 1628 | kfree(osb->osb_orphan_wipes); |
ccd979bd MF |
1629 | /* FIXME |
1630 | * This belongs in journal shutdown, but because we have to | |
1631 | * allocate osb->journal at the start of ocfs2_initalize_osb(), | |
1632 | * we free it here. | |
1633 | */ | |
1634 | kfree(osb->journal); | |
1635 | if (osb->local_alloc_copy) | |
1636 | kfree(osb->local_alloc_copy); | |
1637 | kfree(osb->uuid_str); | |
1638 | ocfs2_put_dlm_debug(osb->osb_dlm_debug); | |
1639 | memset(osb, 0, sizeof(struct ocfs2_super)); | |
1640 | ||
1641 | mlog_exit_void(); | |
1642 | } | |
1643 | ||
1644 | /* Put OCFS2 into a readonly state, or (if the user specifies it), | |
1645 | * panic(). We do not support continue-on-error operation. */ | |
1646 | static void ocfs2_handle_error(struct super_block *sb) | |
1647 | { | |
1648 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1649 | ||
1650 | if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) | |
1651 | panic("OCFS2: (device %s): panic forced after error\n", | |
1652 | sb->s_id); | |
1653 | ||
1654 | ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); | |
1655 | ||
1656 | if (sb->s_flags & MS_RDONLY && | |
1657 | (ocfs2_is_soft_readonly(osb) || | |
1658 | ocfs2_is_hard_readonly(osb))) | |
1659 | return; | |
1660 | ||
1661 | printk(KERN_CRIT "File system is now read-only due to the potential " | |
1662 | "of on-disk corruption. Please run fsck.ocfs2 once the file " | |
1663 | "system is unmounted.\n"); | |
1664 | sb->s_flags |= MS_RDONLY; | |
1665 | ocfs2_set_ro_flag(osb, 0); | |
1666 | } | |
1667 | ||
1668 | static char error_buf[1024]; | |
1669 | ||
1670 | void __ocfs2_error(struct super_block *sb, | |
1671 | const char *function, | |
1672 | const char *fmt, ...) | |
1673 | { | |
1674 | va_list args; | |
1675 | ||
1676 | va_start(args, fmt); | |
1677 | vsprintf(error_buf, fmt, args); | |
1678 | va_end(args); | |
1679 | ||
1680 | /* Not using mlog here because we want to show the actual | |
1681 | * function the error came from. */ | |
1682 | printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", | |
1683 | sb->s_id, function, error_buf); | |
1684 | ||
1685 | ocfs2_handle_error(sb); | |
1686 | } | |
1687 | ||
1688 | /* Handle critical errors. This is intentionally more drastic than | |
1689 | * ocfs2_handle_error, so we only use for things like journal errors, | |
1690 | * etc. */ | |
1691 | void __ocfs2_abort(struct super_block* sb, | |
1692 | const char *function, | |
1693 | const char *fmt, ...) | |
1694 | { | |
1695 | va_list args; | |
1696 | ||
1697 | va_start(args, fmt); | |
1698 | vsprintf(error_buf, fmt, args); | |
1699 | va_end(args); | |
1700 | ||
1701 | printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", | |
1702 | sb->s_id, function, error_buf); | |
1703 | ||
1704 | /* We don't have the cluster support yet to go straight to | |
1705 | * hard readonly in here. Until then, we want to keep | |
1706 | * ocfs2_abort() so that we can at least mark critical | |
1707 | * errors. | |
1708 | * | |
1709 | * TODO: This should abort the journal and alert other nodes | |
1710 | * that our slot needs recovery. */ | |
1711 | ||
1712 | /* Force a panic(). This stinks, but it's better than letting | |
1713 | * things continue without having a proper hard readonly | |
1714 | * here. */ | |
1715 | OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; | |
1716 | ocfs2_handle_error(sb); | |
1717 | } | |
1718 | ||
1719 | module_init(ocfs2_init); | |
1720 | module_exit(ocfs2_exit); |