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9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/sched.h>
13#include <linux/slab.h>
14#include <linux/spinlock.h>
15#include <linux/completion.h>
16#include <linux/buffer_head.h>
17#include <linux/blkdev.h>
18#include <linux/kthread.h>
19#include <linux/export.h>
20#include <linux/namei.h>
21#include <linux/mount.h>
22#include <linux/gfs2_ondisk.h>
23#include <linux/quotaops.h>
24#include <linux/lockdep.h>
25#include <linux/module.h>
26
27#include "gfs2.h"
28#include "incore.h"
29#include "bmap.h"
30#include "glock.h"
31#include "glops.h"
32#include "inode.h"
33#include "recovery.h"
34#include "rgrp.h"
35#include "super.h"
36#include "sys.h"
37#include "util.h"
38#include "log.h"
39#include "quota.h"
40#include "dir.h"
41#include "meta_io.h"
42#include "trace_gfs2.h"
43
44#define DO 0
45#define UNDO 1
46
47
48
49
50
51
52
53static void gfs2_tune_init(struct gfs2_tune *gt)
54{
55 spin_lock_init(>->gt_spin);
56
57 gt->gt_quota_warn_period = 10;
58 gt->gt_quota_scale_num = 1;
59 gt->gt_quota_scale_den = 1;
60 gt->gt_new_files_jdata = 0;
61 gt->gt_max_readahead = 1 << 18;
62 gt->gt_complain_secs = 10;
63}
64
65static struct gfs2_sbd *init_sbd(struct super_block *sb)
66{
67 struct gfs2_sbd *sdp;
68 struct address_space *mapping;
69
70 sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
71 if (!sdp)
72 return NULL;
73
74 sb->s_fs_info = sdp;
75 sdp->sd_vfs = sb;
76 sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats);
77 if (!sdp->sd_lkstats) {
78 kfree(sdp);
79 return NULL;
80 }
81
82 set_bit(SDF_NOJOURNALID, &sdp->sd_flags);
83 gfs2_tune_init(&sdp->sd_tune);
84
85 init_waitqueue_head(&sdp->sd_glock_wait);
86 atomic_set(&sdp->sd_glock_disposal, 0);
87 init_completion(&sdp->sd_locking_init);
88 init_completion(&sdp->sd_wdack);
89 spin_lock_init(&sdp->sd_statfs_spin);
90
91 spin_lock_init(&sdp->sd_rindex_spin);
92 sdp->sd_rindex_tree.rb_node = NULL;
93
94 INIT_LIST_HEAD(&sdp->sd_jindex_list);
95 spin_lock_init(&sdp->sd_jindex_spin);
96 mutex_init(&sdp->sd_jindex_mutex);
97 init_completion(&sdp->sd_journal_ready);
98
99 INIT_LIST_HEAD(&sdp->sd_quota_list);
100 mutex_init(&sdp->sd_quota_mutex);
101 mutex_init(&sdp->sd_quota_sync_mutex);
102 init_waitqueue_head(&sdp->sd_quota_wait);
103 INIT_LIST_HEAD(&sdp->sd_trunc_list);
104 spin_lock_init(&sdp->sd_trunc_lock);
105 spin_lock_init(&sdp->sd_bitmap_lock);
106
107 mapping = &sdp->sd_aspace;
108
109 address_space_init_once(mapping);
110 mapping->a_ops = &gfs2_rgrp_aops;
111 mapping->host = sb->s_bdev->bd_inode;
112 mapping->flags = 0;
113 mapping_set_gfp_mask(mapping, GFP_NOFS);
114 mapping->private_data = NULL;
115 mapping->writeback_index = 0;
116
117 spin_lock_init(&sdp->sd_log_lock);
118 atomic_set(&sdp->sd_log_pinned, 0);
119 INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
120 INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
121 spin_lock_init(&sdp->sd_ordered_lock);
122
123 init_waitqueue_head(&sdp->sd_log_waitq);
124 init_waitqueue_head(&sdp->sd_logd_waitq);
125 spin_lock_init(&sdp->sd_ail_lock);
126 INIT_LIST_HEAD(&sdp->sd_ail1_list);
127 INIT_LIST_HEAD(&sdp->sd_ail2_list);
128
129 init_rwsem(&sdp->sd_log_flush_lock);
130 atomic_set(&sdp->sd_log_in_flight, 0);
131 atomic_set(&sdp->sd_reserving_log, 0);
132 init_waitqueue_head(&sdp->sd_reserving_log_wait);
133 init_waitqueue_head(&sdp->sd_log_flush_wait);
134 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
135 mutex_init(&sdp->sd_freeze_mutex);
136
137 return sdp;
138}
139
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149
150
151
152static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent)
153{
154 struct gfs2_sb_host *sb = &sdp->sd_sb;
155
156 if (sb->sb_magic != GFS2_MAGIC ||
157 sb->sb_type != GFS2_METATYPE_SB) {
158 if (!silent)
159 pr_warn("not a GFS2 filesystem\n");
160 return -EINVAL;
161 }
162
163
164
165 if (sb->sb_fs_format == GFS2_FORMAT_FS &&
166 sb->sb_multihost_format == GFS2_FORMAT_MULTI)
167 return 0;
168
169 fs_warn(sdp, "Unknown on-disk format, unable to mount\n");
170
171 return -EINVAL;
172}
173
174static void end_bio_io_page(struct bio *bio)
175{
176 struct page *page = bio->bi_private;
177
178 if (!bio->bi_error)
179 SetPageUptodate(page);
180 else
181 pr_warn("error %d reading superblock\n", bio->bi_error);
182 unlock_page(page);
183}
184
185static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
186{
187 struct gfs2_sb_host *sb = &sdp->sd_sb;
188 struct super_block *s = sdp->sd_vfs;
189 const struct gfs2_sb *str = buf;
190
191 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
192 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
193 sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
194 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
195 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
196 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
197 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
198 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
199 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
200 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
201 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
202
203 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
204 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
205 memcpy(s->s_uuid, str->sb_uuid, 16);
206}
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225
226
227static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
228{
229 struct super_block *sb = sdp->sd_vfs;
230 struct gfs2_sb *p;
231 struct page *page;
232 struct bio *bio;
233
234 page = alloc_page(GFP_NOFS);
235 if (unlikely(!page))
236 return -ENOMEM;
237
238 ClearPageUptodate(page);
239 ClearPageDirty(page);
240 lock_page(page);
241
242 bio = bio_alloc(GFP_NOFS, 1);
243 bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
244 bio->bi_bdev = sb->s_bdev;
245 bio_add_page(bio, page, PAGE_SIZE, 0);
246
247 bio->bi_end_io = end_bio_io_page;
248 bio->bi_private = page;
249 submit_bio(READ_SYNC | REQ_META, bio);
250 wait_on_page_locked(page);
251 bio_put(bio);
252 if (!PageUptodate(page)) {
253 __free_page(page);
254 return -EIO;
255 }
256 p = kmap(page);
257 gfs2_sb_in(sdp, p);
258 kunmap(page);
259 __free_page(page);
260 return gfs2_check_sb(sdp, silent);
261}
262
263
264
265
266
267
268
269
270static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
271{
272 u32 hash_blocks, ind_blocks, leaf_blocks;
273 u32 tmp_blocks;
274 unsigned int x;
275 int error;
276
277 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
278 if (error) {
279 if (!silent)
280 fs_err(sdp, "can't read superblock\n");
281 return error;
282 }
283
284 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
285 GFS2_BASIC_BLOCK_SHIFT;
286 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
287 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
288 sizeof(struct gfs2_dinode)) / sizeof(u64);
289 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
290 sizeof(struct gfs2_meta_header)) / sizeof(u64);
291 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
292 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
293 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
294 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
295 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
296 sizeof(struct gfs2_meta_header)) /
297 sizeof(struct gfs2_quota_change);
298 sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
299 sizeof(struct gfs2_meta_header))
300 * GFS2_NBBY;
301
302
303
304 hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH),
305 sdp->sd_jbsize);
306
307 ind_blocks = 0;
308 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
309 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
310 ind_blocks += tmp_blocks;
311 }
312
313 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
314
315 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
316
317 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
318 sizeof(struct gfs2_dinode);
319 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
320 for (x = 2;; x++) {
321 u64 space, d;
322 u32 m;
323
324 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
325 d = space;
326 m = do_div(d, sdp->sd_inptrs);
327
328 if (d != sdp->sd_heightsize[x - 1] || m)
329 break;
330 sdp->sd_heightsize[x] = space;
331 }
332 sdp->sd_max_height = x;
333 sdp->sd_heightsize[x] = ~0;
334 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
335
336 sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
337 sizeof(struct gfs2_dinode);
338 sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs;
339 for (x = 2;; x++) {
340 u64 space, d;
341 u32 m;
342
343 space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs;
344 d = space;
345 m = do_div(d, sdp->sd_inptrs);
346
347 if (d != sdp->sd_jheightsize[x - 1] || m)
348 break;
349 sdp->sd_jheightsize[x] = space;
350 }
351 sdp->sd_max_jheight = x;
352 sdp->sd_jheightsize[x] = ~0;
353 gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
354
355 sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
356 sizeof(struct gfs2_leaf)) /
357 GFS2_MIN_DIRENT_SIZE;
358 return 0;
359}
360
361static int init_names(struct gfs2_sbd *sdp, int silent)
362{
363 char *proto, *table;
364 int error = 0;
365
366 proto = sdp->sd_args.ar_lockproto;
367 table = sdp->sd_args.ar_locktable;
368
369
370
371 if (!proto[0] || !table[0]) {
372 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
373 if (error)
374 return error;
375
376 if (!proto[0])
377 proto = sdp->sd_sb.sb_lockproto;
378 if (!table[0])
379 table = sdp->sd_sb.sb_locktable;
380 }
381
382 if (!table[0])
383 table = sdp->sd_vfs->s_id;
384
385 strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
386 strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
387
388 table = sdp->sd_table_name;
389 while ((table = strchr(table, '/')))
390 *table = '_';
391
392 return error;
393}
394
395static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
396 int undo)
397{
398 int error = 0;
399
400 if (undo)
401 goto fail_trans;
402
403 error = gfs2_glock_nq_num(sdp,
404 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
405 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
406 mount_gh);
407 if (error) {
408 fs_err(sdp, "can't acquire mount glock: %d\n", error);
409 goto fail;
410 }
411
412 error = gfs2_glock_nq_num(sdp,
413 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
414 LM_ST_SHARED,
415 LM_FLAG_NOEXP | GL_EXACT,
416 &sdp->sd_live_gh);
417 if (error) {
418 fs_err(sdp, "can't acquire live glock: %d\n", error);
419 goto fail_mount;
420 }
421
422 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
423 CREATE, &sdp->sd_rename_gl);
424 if (error) {
425 fs_err(sdp, "can't create rename glock: %d\n", error);
426 goto fail_live;
427 }
428
429 error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops,
430 CREATE, &sdp->sd_freeze_gl);
431 if (error) {
432 fs_err(sdp, "can't create transaction glock: %d\n", error);
433 goto fail_rename;
434 }
435
436 return 0;
437
438fail_trans:
439 gfs2_glock_put(sdp->sd_freeze_gl);
440fail_rename:
441 gfs2_glock_put(sdp->sd_rename_gl);
442fail_live:
443 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
444fail_mount:
445 gfs2_glock_dq_uninit(mount_gh);
446fail:
447 return error;
448}
449
450static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
451 u64 no_addr, const char *name)
452{
453 struct gfs2_sbd *sdp = sb->s_fs_info;
454 struct dentry *dentry;
455 struct inode *inode;
456
457 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0);
458 if (IS_ERR(inode)) {
459 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
460 return PTR_ERR(inode);
461 }
462 dentry = d_make_root(inode);
463 if (!dentry) {
464 fs_err(sdp, "can't alloc %s dentry\n", name);
465 return -ENOMEM;
466 }
467 *dptr = dentry;
468 return 0;
469}
470
471static int init_sb(struct gfs2_sbd *sdp, int silent)
472{
473 struct super_block *sb = sdp->sd_vfs;
474 struct gfs2_holder sb_gh;
475 u64 no_addr;
476 int ret;
477
478 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
479 LM_ST_SHARED, 0, &sb_gh);
480 if (ret) {
481 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
482 return ret;
483 }
484
485 ret = gfs2_read_sb(sdp, silent);
486 if (ret) {
487 fs_err(sdp, "can't read superblock: %d\n", ret);
488 goto out;
489 }
490
491
492 if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
493 ret = -EINVAL;
494 fs_err(sdp, "FS block size (%u) is too small for device "
495 "block size (%u)\n",
496 sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
497 goto out;
498 }
499 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
500 ret = -EINVAL;
501 fs_err(sdp, "FS block size (%u) is too big for machine "
502 "page size (%u)\n",
503 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
504 goto out;
505 }
506 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
507
508
509 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
510 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
511 if (ret)
512 goto out;
513
514
515 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
516 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
517 if (ret) {
518 dput(sdp->sd_root_dir);
519 goto out;
520 }
521 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
522out:
523 gfs2_glock_dq_uninit(&sb_gh);
524 return ret;
525}
526
527static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
528{
529 char *message = "FIRSTMOUNT=Done";
530 char *envp[] = { message, NULL };
531
532 fs_info(sdp, "first mount done, others may mount\n");
533
534 if (sdp->sd_lockstruct.ls_ops->lm_first_done)
535 sdp->sd_lockstruct.ls_ops->lm_first_done(sdp);
536
537 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
538}
539
540
541
542
543
544
545
546
547
548static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
549{
550 struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
551 struct qstr name;
552 char buf[20];
553 struct gfs2_jdesc *jd;
554 int error;
555
556 name.name = buf;
557
558 mutex_lock(&sdp->sd_jindex_mutex);
559
560 for (;;) {
561 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
562 if (error)
563 break;
564
565 name.len = sprintf(buf, "journal%u", sdp->sd_journals);
566 name.hash = gfs2_disk_hash(name.name, name.len);
567
568 error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
569 if (error == -ENOENT) {
570 error = 0;
571 break;
572 }
573
574 gfs2_glock_dq_uninit(ji_gh);
575
576 if (error)
577 break;
578
579 error = -ENOMEM;
580 jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
581 if (!jd)
582 break;
583
584 INIT_LIST_HEAD(&jd->extent_list);
585 INIT_LIST_HEAD(&jd->jd_revoke_list);
586
587 INIT_WORK(&jd->jd_work, gfs2_recover_func);
588 jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
589 if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
590 if (!jd->jd_inode)
591 error = -ENOENT;
592 else
593 error = PTR_ERR(jd->jd_inode);
594 kfree(jd);
595 break;
596 }
597
598 spin_lock(&sdp->sd_jindex_spin);
599 jd->jd_jid = sdp->sd_journals++;
600 list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
601 spin_unlock(&sdp->sd_jindex_spin);
602 }
603
604 mutex_unlock(&sdp->sd_jindex_mutex);
605
606 return error;
607}
608
609
610
611
612
613
614
615
616static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
617{
618 int error;
619 struct gfs2_holder j_gh;
620 struct gfs2_log_header_host head;
621 struct gfs2_inode *ip;
622
623 ip = GFS2_I(jd->jd_inode);
624 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
625 GL_EXACT | GL_NOCACHE, &j_gh);
626 if (error) {
627 fs_err(sdp, "Error locking journal for spectator mount.\n");
628 return -EPERM;
629 }
630 error = gfs2_jdesc_check(jd);
631 if (error) {
632 fs_err(sdp, "Error checking journal for spectator mount.\n");
633 goto out_unlock;
634 }
635 error = gfs2_find_jhead(jd, &head);
636 if (error) {
637 fs_err(sdp, "Error parsing journal for spectator mount.\n");
638 goto out_unlock;
639 }
640 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
641 error = -EPERM;
642 fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
643 "must not be a spectator.\n", jd->jd_jid);
644 }
645
646out_unlock:
647 gfs2_glock_dq_uninit(&j_gh);
648 return error;
649}
650
651static int init_journal(struct gfs2_sbd *sdp, int undo)
652{
653 struct inode *master = d_inode(sdp->sd_master_dir);
654 struct gfs2_holder ji_gh;
655 struct gfs2_inode *ip;
656 int jindex = 1;
657 int error = 0;
658
659 if (undo) {
660 jindex = 0;
661 goto fail_jinode_gh;
662 }
663
664 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
665 if (IS_ERR(sdp->sd_jindex)) {
666 fs_err(sdp, "can't lookup journal index: %d\n", error);
667 return PTR_ERR(sdp->sd_jindex);
668 }
669
670
671
672 error = gfs2_jindex_hold(sdp, &ji_gh);
673 if (error) {
674 fs_err(sdp, "can't read journal index: %d\n", error);
675 goto fail;
676 }
677
678 error = -EUSERS;
679 if (!gfs2_jindex_size(sdp)) {
680 fs_err(sdp, "no journals!\n");
681 goto fail_jindex;
682 }
683
684 if (sdp->sd_args.ar_spectator) {
685 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
686 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
687 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
688 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
689 } else {
690 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
691 fs_err(sdp, "can't mount journal #%u\n",
692 sdp->sd_lockstruct.ls_jid);
693 fs_err(sdp, "there are only %u journals (0 - %u)\n",
694 gfs2_jindex_size(sdp),
695 gfs2_jindex_size(sdp) - 1);
696 goto fail_jindex;
697 }
698 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
699
700 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
701 &gfs2_journal_glops,
702 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
703 &sdp->sd_journal_gh);
704 if (error) {
705 fs_err(sdp, "can't acquire journal glock: %d\n", error);
706 goto fail_jindex;
707 }
708
709 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
710 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
711 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
712 &sdp->sd_jinode_gh);
713 if (error) {
714 fs_err(sdp, "can't acquire journal inode glock: %d\n",
715 error);
716 goto fail_journal_gh;
717 }
718
719 error = gfs2_jdesc_check(sdp->sd_jdesc);
720 if (error) {
721 fs_err(sdp, "my journal (%u) is bad: %d\n",
722 sdp->sd_jdesc->jd_jid, error);
723 goto fail_jinode_gh;
724 }
725 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
726 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
727 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
728
729
730 gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
731 }
732 trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
733
734 if (sdp->sd_lockstruct.ls_first) {
735 unsigned int x;
736 for (x = 0; x < sdp->sd_journals; x++) {
737 struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
738
739 if (sdp->sd_args.ar_spectator) {
740 error = check_journal_clean(sdp, jd);
741 if (error)
742 goto fail_jinode_gh;
743 continue;
744 }
745 error = gfs2_recover_journal(jd, true);
746 if (error) {
747 fs_err(sdp, "error recovering journal %u: %d\n",
748 x, error);
749 goto fail_jinode_gh;
750 }
751 }
752
753 gfs2_others_may_mount(sdp);
754 } else if (!sdp->sd_args.ar_spectator) {
755 error = gfs2_recover_journal(sdp->sd_jdesc, true);
756 if (error) {
757 fs_err(sdp, "error recovering my journal: %d\n", error);
758 goto fail_jinode_gh;
759 }
760 }
761
762 sdp->sd_log_idle = 1;
763 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
764 gfs2_glock_dq_uninit(&ji_gh);
765 jindex = 0;
766 INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
767 return 0;
768
769fail_jinode_gh:
770 if (!sdp->sd_args.ar_spectator)
771 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
772fail_journal_gh:
773 if (!sdp->sd_args.ar_spectator)
774 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
775fail_jindex:
776 gfs2_jindex_free(sdp);
777 if (jindex)
778 gfs2_glock_dq_uninit(&ji_gh);
779fail:
780 iput(sdp->sd_jindex);
781 return error;
782}
783
784static struct lock_class_key gfs2_quota_imutex_key;
785
786static int init_inodes(struct gfs2_sbd *sdp, int undo)
787{
788 int error = 0;
789 struct inode *master = d_inode(sdp->sd_master_dir);
790
791 if (undo)
792 goto fail_qinode;
793
794 error = init_journal(sdp, undo);
795 complete_all(&sdp->sd_journal_ready);
796 if (error)
797 goto fail;
798
799
800 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
801 if (IS_ERR(sdp->sd_statfs_inode)) {
802 error = PTR_ERR(sdp->sd_statfs_inode);
803 fs_err(sdp, "can't read in statfs inode: %d\n", error);
804 goto fail_journal;
805 }
806
807
808 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
809 if (IS_ERR(sdp->sd_rindex)) {
810 error = PTR_ERR(sdp->sd_rindex);
811 fs_err(sdp, "can't get resource index inode: %d\n", error);
812 goto fail_statfs;
813 }
814 sdp->sd_rindex_uptodate = 0;
815
816
817 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
818 if (IS_ERR(sdp->sd_quota_inode)) {
819 error = PTR_ERR(sdp->sd_quota_inode);
820 fs_err(sdp, "can't get quota file inode: %d\n", error);
821 goto fail_rindex;
822 }
823
824
825
826
827 lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
828 &gfs2_quota_imutex_key);
829
830 error = gfs2_rindex_update(sdp);
831 if (error)
832 goto fail_qinode;
833
834 return 0;
835
836fail_qinode:
837 iput(sdp->sd_quota_inode);
838fail_rindex:
839 gfs2_clear_rgrpd(sdp);
840 iput(sdp->sd_rindex);
841fail_statfs:
842 iput(sdp->sd_statfs_inode);
843fail_journal:
844 init_journal(sdp, UNDO);
845fail:
846 return error;
847}
848
849static int init_per_node(struct gfs2_sbd *sdp, int undo)
850{
851 struct inode *pn = NULL;
852 char buf[30];
853 int error = 0;
854 struct gfs2_inode *ip;
855 struct inode *master = d_inode(sdp->sd_master_dir);
856
857 if (sdp->sd_args.ar_spectator)
858 return 0;
859
860 if (undo)
861 goto fail_qc_gh;
862
863 pn = gfs2_lookup_simple(master, "per_node");
864 if (IS_ERR(pn)) {
865 error = PTR_ERR(pn);
866 fs_err(sdp, "can't find per_node directory: %d\n", error);
867 return error;
868 }
869
870 sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
871 sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
872 if (IS_ERR(sdp->sd_sc_inode)) {
873 error = PTR_ERR(sdp->sd_sc_inode);
874 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
875 goto fail;
876 }
877
878 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
879 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
880 if (IS_ERR(sdp->sd_qc_inode)) {
881 error = PTR_ERR(sdp->sd_qc_inode);
882 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
883 goto fail_ut_i;
884 }
885
886 iput(pn);
887 pn = NULL;
888
889 ip = GFS2_I(sdp->sd_sc_inode);
890 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
891 &sdp->sd_sc_gh);
892 if (error) {
893 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
894 goto fail_qc_i;
895 }
896
897 ip = GFS2_I(sdp->sd_qc_inode);
898 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
899 &sdp->sd_qc_gh);
900 if (error) {
901 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
902 goto fail_ut_gh;
903 }
904
905 return 0;
906
907fail_qc_gh:
908 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
909fail_ut_gh:
910 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
911fail_qc_i:
912 iput(sdp->sd_qc_inode);
913fail_ut_i:
914 iput(sdp->sd_sc_inode);
915fail:
916 iput(pn);
917 return error;
918}
919
920static const match_table_t nolock_tokens = {
921 { Opt_jid, "jid=%d\n", },
922 { Opt_err, NULL },
923};
924
925static const struct lm_lockops nolock_ops = {
926 .lm_proto_name = "lock_nolock",
927 .lm_put_lock = gfs2_glock_free,
928 .lm_tokens = &nolock_tokens,
929};
930
931
932
933
934
935
936
937
938
939
940static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
941{
942 const struct lm_lockops *lm;
943 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
944 struct gfs2_args *args = &sdp->sd_args;
945 const char *proto = sdp->sd_proto_name;
946 const char *table = sdp->sd_table_name;
947 char *o, *options;
948 int ret;
949
950 if (!strcmp("lock_nolock", proto)) {
951 lm = &nolock_ops;
952 sdp->sd_args.ar_localflocks = 1;
953#ifdef CONFIG_GFS2_FS_LOCKING_DLM
954 } else if (!strcmp("lock_dlm", proto)) {
955 lm = &gfs2_dlm_ops;
956#endif
957 } else {
958 pr_info("can't find protocol %s\n", proto);
959 return -ENOENT;
960 }
961
962 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
963
964 ls->ls_ops = lm;
965 ls->ls_first = 1;
966
967 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
968 substring_t tmp[MAX_OPT_ARGS];
969 int token, option;
970
971 if (!o || !*o)
972 continue;
973
974 token = match_token(o, *lm->lm_tokens, tmp);
975 switch (token) {
976 case Opt_jid:
977 ret = match_int(&tmp[0], &option);
978 if (ret || option < 0)
979 goto hostdata_error;
980 if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
981 ls->ls_jid = option;
982 break;
983 case Opt_id:
984 case Opt_nodir:
985
986 break;
987 case Opt_first:
988 ret = match_int(&tmp[0], &option);
989 if (ret || (option != 0 && option != 1))
990 goto hostdata_error;
991 ls->ls_first = option;
992 break;
993 case Opt_err:
994 default:
995hostdata_error:
996 fs_info(sdp, "unknown hostdata (%s)\n", o);
997 return -EINVAL;
998 }
999 }
1000
1001 if (lm->lm_mount == NULL) {
1002 fs_info(sdp, "Now mounting FS...\n");
1003 complete_all(&sdp->sd_locking_init);
1004 return 0;
1005 }
1006 ret = lm->lm_mount(sdp, table);
1007 if (ret == 0)
1008 fs_info(sdp, "Joined cluster. Now mounting FS...\n");
1009 complete_all(&sdp->sd_locking_init);
1010 return ret;
1011}
1012
1013void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1014{
1015 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
1016 if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
1017 lm->lm_unmount)
1018 lm->lm_unmount(sdp);
1019}
1020
1021static int wait_on_journal(struct gfs2_sbd *sdp)
1022{
1023 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
1024 return 0;
1025
1026 return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
1027 ? -EINTR : 0;
1028}
1029
1030void gfs2_online_uevent(struct gfs2_sbd *sdp)
1031{
1032 struct super_block *sb = sdp->sd_vfs;
1033 char ro[20];
1034 char spectator[20];
1035 char *envp[] = { ro, spectator, NULL };
1036 sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0);
1037 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
1038 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
1039}
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent)
1051{
1052 struct gfs2_sbd *sdp;
1053 struct gfs2_holder mount_gh;
1054 int error;
1055
1056 sdp = init_sbd(sb);
1057 if (!sdp) {
1058 pr_warn("can't alloc struct gfs2_sbd\n");
1059 return -ENOMEM;
1060 }
1061 sdp->sd_args = *args;
1062
1063 if (sdp->sd_args.ar_spectator) {
1064 sb->s_flags |= MS_RDONLY;
1065 set_bit(SDF_RORECOVERY, &sdp->sd_flags);
1066 }
1067 if (sdp->sd_args.ar_posix_acl)
1068 sb->s_flags |= MS_POSIXACL;
1069 if (sdp->sd_args.ar_nobarrier)
1070 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1071
1072 sb->s_flags |= MS_NOSEC;
1073 sb->s_magic = GFS2_MAGIC;
1074 sb->s_op = &gfs2_super_ops;
1075 sb->s_d_op = &gfs2_dops;
1076 sb->s_export_op = &gfs2_export_ops;
1077 sb->s_xattr = gfs2_xattr_handlers;
1078 sb->s_qcop = &gfs2_quotactl_ops;
1079 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1080 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1081 sb->s_time_gran = 1;
1082 sb->s_maxbytes = MAX_LFS_FILESIZE;
1083
1084
1085
1086 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1087 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1088 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1089 GFS2_BASIC_BLOCK_SHIFT;
1090 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
1091
1092 sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
1093 sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
1094 if (sdp->sd_args.ar_statfs_quantum) {
1095 sdp->sd_tune.gt_statfs_slow = 0;
1096 sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
1097 } else {
1098 sdp->sd_tune.gt_statfs_slow = 1;
1099 sdp->sd_tune.gt_statfs_quantum = 30;
1100 }
1101
1102 error = init_names(sdp, silent);
1103 if (error) {
1104
1105
1106 free_percpu(sdp->sd_lkstats);
1107 kfree(sdp);
1108 sb->s_fs_info = NULL;
1109 return error;
1110 }
1111
1112 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s", sdp->sd_table_name);
1113
1114 error = gfs2_sys_fs_add(sdp);
1115
1116
1117
1118
1119
1120
1121
1122 if (error)
1123 return error;
1124
1125 gfs2_create_debugfs_file(sdp);
1126
1127 error = gfs2_lm_mount(sdp, silent);
1128 if (error)
1129 goto fail_debug;
1130
1131 error = init_locking(sdp, &mount_gh, DO);
1132 if (error)
1133 goto fail_lm;
1134
1135 error = init_sb(sdp, silent);
1136 if (error)
1137 goto fail_locking;
1138
1139 error = wait_on_journal(sdp);
1140 if (error)
1141 goto fail_sb;
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151 if (sdp->sd_lockstruct.ls_jid < 0) {
1152 error = sdp->sd_lockstruct.ls_jid;
1153 sdp->sd_lockstruct.ls_jid = 0;
1154 goto fail_sb;
1155 }
1156
1157 if (sdp->sd_args.ar_spectator)
1158 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s",
1159 sdp->sd_table_name);
1160 else
1161 snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u",
1162 sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
1163
1164 error = init_inodes(sdp, DO);
1165 if (error)
1166 goto fail_sb;
1167
1168 error = init_per_node(sdp, DO);
1169 if (error)
1170 goto fail_inodes;
1171
1172 error = gfs2_statfs_init(sdp);
1173 if (error) {
1174 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1175 goto fail_per_node;
1176 }
1177
1178 if (!(sb->s_flags & MS_RDONLY)) {
1179 error = gfs2_make_fs_rw(sdp);
1180 if (error) {
1181 fs_err(sdp, "can't make FS RW: %d\n", error);
1182 goto fail_per_node;
1183 }
1184 }
1185
1186 gfs2_glock_dq_uninit(&mount_gh);
1187 gfs2_online_uevent(sdp);
1188 return 0;
1189
1190fail_per_node:
1191 init_per_node(sdp, UNDO);
1192fail_inodes:
1193 init_inodes(sdp, UNDO);
1194fail_sb:
1195 if (sdp->sd_root_dir)
1196 dput(sdp->sd_root_dir);
1197 if (sdp->sd_master_dir)
1198 dput(sdp->sd_master_dir);
1199 if (sb->s_root)
1200 dput(sb->s_root);
1201 sb->s_root = NULL;
1202fail_locking:
1203 init_locking(sdp, &mount_gh, UNDO);
1204fail_lm:
1205 complete_all(&sdp->sd_journal_ready);
1206 gfs2_gl_hash_clear(sdp);
1207 gfs2_lm_unmount(sdp);
1208fail_debug:
1209 gfs2_delete_debugfs_file(sdp);
1210 free_percpu(sdp->sd_lkstats);
1211
1212
1213 gfs2_sys_fs_del(sdp);
1214 sb->s_fs_info = NULL;
1215 return error;
1216}
1217
1218static int set_gfs2_super(struct super_block *s, void *data)
1219{
1220 s->s_bdev = data;
1221 s->s_dev = s->s_bdev->bd_dev;
1222
1223
1224
1225
1226
1227 s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info;
1228 return 0;
1229}
1230
1231static int test_gfs2_super(struct super_block *s, void *ptr)
1232{
1233 struct block_device *bdev = ptr;
1234 return (bdev == s->s_bdev);
1235}
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags,
1252 const char *dev_name, void *data)
1253{
1254 struct block_device *bdev;
1255 struct super_block *s;
1256 fmode_t mode = FMODE_READ | FMODE_EXCL;
1257 int error;
1258 struct gfs2_args args;
1259 struct gfs2_sbd *sdp;
1260
1261 if (!(flags & MS_RDONLY))
1262 mode |= FMODE_WRITE;
1263
1264 bdev = blkdev_get_by_path(dev_name, mode, fs_type);
1265 if (IS_ERR(bdev))
1266 return ERR_CAST(bdev);
1267
1268
1269
1270
1271
1272
1273 mutex_lock(&bdev->bd_fsfreeze_mutex);
1274 if (bdev->bd_fsfreeze_count > 0) {
1275 mutex_unlock(&bdev->bd_fsfreeze_mutex);
1276 error = -EBUSY;
1277 goto error_bdev;
1278 }
1279 s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev);
1280 mutex_unlock(&bdev->bd_fsfreeze_mutex);
1281 error = PTR_ERR(s);
1282 if (IS_ERR(s))
1283 goto error_bdev;
1284
1285 if (s->s_root) {
1286
1287
1288
1289
1290
1291
1292
1293 up_write(&s->s_umount);
1294 blkdev_put(bdev, mode);
1295 down_write(&s->s_umount);
1296 } else {
1297
1298 s->s_mode = mode;
1299 }
1300
1301 memset(&args, 0, sizeof(args));
1302 args.ar_quota = GFS2_QUOTA_DEFAULT;
1303 args.ar_data = GFS2_DATA_DEFAULT;
1304 args.ar_commit = 30;
1305 args.ar_statfs_quantum = 30;
1306 args.ar_quota_quantum = 60;
1307 args.ar_errors = GFS2_ERRORS_DEFAULT;
1308
1309 error = gfs2_mount_args(&args, data);
1310 if (error) {
1311 pr_warn("can't parse mount arguments\n");
1312 goto error_super;
1313 }
1314
1315 if (s->s_root) {
1316 error = -EBUSY;
1317 if ((flags ^ s->s_flags) & MS_RDONLY)
1318 goto error_super;
1319 } else {
1320 snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev);
1321 sb_set_blocksize(s, block_size(bdev));
1322 error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0);
1323 if (error)
1324 goto error_super;
1325 s->s_flags |= MS_ACTIVE;
1326 bdev->bd_super = s;
1327 }
1328
1329 sdp = s->s_fs_info;
1330 if (args.ar_meta)
1331 return dget(sdp->sd_master_dir);
1332 else
1333 return dget(sdp->sd_root_dir);
1334
1335error_super:
1336 deactivate_locked_super(s);
1337 return ERR_PTR(error);
1338error_bdev:
1339 blkdev_put(bdev, mode);
1340 return ERR_PTR(error);
1341}
1342
1343static int set_meta_super(struct super_block *s, void *ptr)
1344{
1345 return -EINVAL;
1346}
1347
1348static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
1349 int flags, const char *dev_name, void *data)
1350{
1351 struct super_block *s;
1352 struct gfs2_sbd *sdp;
1353 struct path path;
1354 int error;
1355
1356 error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
1357 if (error) {
1358 pr_warn("path_lookup on %s returned error %d\n",
1359 dev_name, error);
1360 return ERR_PTR(error);
1361 }
1362 s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags,
1363 path.dentry->d_sb->s_bdev);
1364 path_put(&path);
1365 if (IS_ERR(s)) {
1366 pr_warn("gfs2 mount does not exist\n");
1367 return ERR_CAST(s);
1368 }
1369 if ((flags ^ s->s_flags) & MS_RDONLY) {
1370 deactivate_locked_super(s);
1371 return ERR_PTR(-EBUSY);
1372 }
1373 sdp = s->s_fs_info;
1374 return dget(sdp->sd_master_dir);
1375}
1376
1377static void gfs2_kill_sb(struct super_block *sb)
1378{
1379 struct gfs2_sbd *sdp = sb->s_fs_info;
1380
1381 if (sdp == NULL) {
1382 kill_block_super(sb);
1383 return;
1384 }
1385
1386 gfs2_log_flush(sdp, NULL, SYNC_FLUSH);
1387 dput(sdp->sd_root_dir);
1388 dput(sdp->sd_master_dir);
1389 sdp->sd_root_dir = NULL;
1390 sdp->sd_master_dir = NULL;
1391 shrink_dcache_sb(sb);
1392 gfs2_delete_debugfs_file(sdp);
1393 free_percpu(sdp->sd_lkstats);
1394 kill_block_super(sb);
1395}
1396
1397struct file_system_type gfs2_fs_type = {
1398 .name = "gfs2",
1399 .fs_flags = FS_REQUIRES_DEV,
1400 .mount = gfs2_mount,
1401 .kill_sb = gfs2_kill_sb,
1402 .owner = THIS_MODULE,
1403};
1404MODULE_ALIAS_FS("gfs2");
1405
1406struct file_system_type gfs2meta_fs_type = {
1407 .name = "gfs2meta",
1408 .fs_flags = FS_REQUIRES_DEV,
1409 .mount = gfs2_mount_meta,
1410 .owner = THIS_MODULE,
1411};
1412MODULE_ALIAS_FS("gfs2meta");
1413