1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9 #include <linux/sched.h>
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/blkdev.h>
15 #include <linux/kthread.h>
16 #include <linux/export.h>
17 #include <linux/namei.h>
18 #include <linux/mount.h>
19 #include <linux/gfs2_ondisk.h>
20 #include <linux/quotaops.h>
21 #include <linux/lockdep.h>
22 #include <linux/module.h>
23 #include <linux/backing-dev.h>
24 #include <linux/fs_parser.h>
41 #include "trace_gfs2.h"
48 * gfs2_tune_init - Fill a gfs2_tune structure with default values
53 static void gfs2_tune_init(struct gfs2_tune *gt)
55 spin_lock_init(>->gt_spin);
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 = BIT(18);
62 gt->gt_complain_secs = 10;
65 void free_sbd(struct gfs2_sbd *sdp)
68 free_percpu(sdp->sd_lkstats);
72 static struct gfs2_sbd *init_sbd(struct super_block *sb)
75 struct address_space *mapping;
77 sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
82 sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats);
87 set_bit(SDF_NOJOURNALID, &sdp->sd_flags);
88 gfs2_tune_init(&sdp->sd_tune);
90 init_waitqueue_head(&sdp->sd_glock_wait);
91 init_waitqueue_head(&sdp->sd_async_glock_wait);
92 atomic_set(&sdp->sd_glock_disposal, 0);
93 init_completion(&sdp->sd_locking_init);
94 init_completion(&sdp->sd_wdack);
95 spin_lock_init(&sdp->sd_statfs_spin);
97 spin_lock_init(&sdp->sd_rindex_spin);
98 sdp->sd_rindex_tree.rb_node = NULL;
100 INIT_LIST_HEAD(&sdp->sd_jindex_list);
101 spin_lock_init(&sdp->sd_jindex_spin);
102 mutex_init(&sdp->sd_jindex_mutex);
103 init_completion(&sdp->sd_journal_ready);
105 INIT_LIST_HEAD(&sdp->sd_quota_list);
106 mutex_init(&sdp->sd_quota_mutex);
107 mutex_init(&sdp->sd_quota_sync_mutex);
108 init_waitqueue_head(&sdp->sd_quota_wait);
109 INIT_LIST_HEAD(&sdp->sd_trunc_list);
110 spin_lock_init(&sdp->sd_trunc_lock);
111 spin_lock_init(&sdp->sd_bitmap_lock);
113 mapping = &sdp->sd_aspace;
115 address_space_init_once(mapping);
116 mapping->a_ops = &gfs2_rgrp_aops;
117 mapping->host = sb->s_bdev->bd_inode;
119 mapping_set_gfp_mask(mapping, GFP_NOFS);
120 mapping->private_data = NULL;
121 mapping->writeback_index = 0;
123 spin_lock_init(&sdp->sd_log_lock);
124 atomic_set(&sdp->sd_log_pinned, 0);
125 INIT_LIST_HEAD(&sdp->sd_log_revokes);
126 INIT_LIST_HEAD(&sdp->sd_log_ordered);
127 spin_lock_init(&sdp->sd_ordered_lock);
129 init_waitqueue_head(&sdp->sd_log_waitq);
130 init_waitqueue_head(&sdp->sd_logd_waitq);
131 spin_lock_init(&sdp->sd_ail_lock);
132 INIT_LIST_HEAD(&sdp->sd_ail1_list);
133 INIT_LIST_HEAD(&sdp->sd_ail2_list);
135 init_rwsem(&sdp->sd_log_flush_lock);
136 atomic_set(&sdp->sd_log_in_flight, 0);
137 atomic_set(&sdp->sd_reserving_log, 0);
138 init_waitqueue_head(&sdp->sd_reserving_log_wait);
139 init_waitqueue_head(&sdp->sd_log_flush_wait);
140 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
141 mutex_init(&sdp->sd_freeze_mutex);
151 * gfs2_check_sb - Check superblock
152 * @sdp: the filesystem
153 * @sb: The superblock
154 * @silent: Don't print a message if the check fails
156 * Checks the version code of the FS is one that we understand how to
157 * read and that the sizes of the various on-disk structures have not
161 static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent)
163 struct gfs2_sb_host *sb = &sdp->sd_sb;
165 if (sb->sb_magic != GFS2_MAGIC ||
166 sb->sb_type != GFS2_METATYPE_SB) {
168 pr_warn("not a GFS2 filesystem\n");
172 /* If format numbers match exactly, we're done. */
174 if (sb->sb_fs_format == GFS2_FORMAT_FS &&
175 sb->sb_multihost_format == GFS2_FORMAT_MULTI)
178 fs_warn(sdp, "Unknown on-disk format, unable to mount\n");
183 static void end_bio_io_page(struct bio *bio)
185 struct page *page = bio->bi_private;
188 SetPageUptodate(page);
190 pr_warn("error %d reading superblock\n", bio->bi_status);
194 static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
196 struct gfs2_sb_host *sb = &sdp->sd_sb;
197 struct super_block *s = sdp->sd_vfs;
198 const struct gfs2_sb *str = buf;
200 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
201 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
202 sb->sb_format = be32_to_cpu(str->sb_header.mh_format);
203 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
204 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
205 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
206 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
207 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
208 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
209 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
210 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
212 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
213 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
214 memcpy(&s->s_uuid, str->sb_uuid, 16);
218 * gfs2_read_super - Read the gfs2 super block from disk
219 * @sdp: The GFS2 super block
220 * @sector: The location of the super block
221 * @error: The error code to return
223 * This uses the bio functions to read the super block from disk
224 * because we want to be 100% sure that we never read cached data.
225 * A super block is read twice only during each GFS2 mount and is
226 * never written to by the filesystem. The first time its read no
227 * locks are held, and the only details which are looked at are those
228 * relating to the locking protocol. Once locking is up and working,
229 * the sb is read again under the lock to establish the location of
230 * the master directory (contains pointers to journals etc) and the
233 * Returns: 0 on success or error
236 static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
238 struct super_block *sb = sdp->sd_vfs;
243 page = alloc_page(GFP_NOFS);
247 ClearPageUptodate(page);
248 ClearPageDirty(page);
251 bio = bio_alloc(GFP_NOFS, 1);
252 bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
253 bio_set_dev(bio, sb->s_bdev);
254 bio_add_page(bio, page, PAGE_SIZE, 0);
256 bio->bi_end_io = end_bio_io_page;
257 bio->bi_private = page;
258 bio_set_op_attrs(bio, REQ_OP_READ, REQ_META);
260 wait_on_page_locked(page);
262 if (!PageUptodate(page)) {
270 return gfs2_check_sb(sdp, silent);
274 * gfs2_read_sb - Read super block
275 * @sdp: The GFS2 superblock
276 * @silent: Don't print message if mount fails
280 static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
282 u32 hash_blocks, ind_blocks, leaf_blocks;
287 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
290 fs_err(sdp, "can't read superblock\n");
294 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
295 GFS2_BASIC_BLOCK_SHIFT;
296 sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
297 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
298 sizeof(struct gfs2_dinode)) / sizeof(u64);
299 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
300 sizeof(struct gfs2_meta_header)) / sizeof(u64);
301 sdp->sd_ldptrs = (sdp->sd_sb.sb_bsize -
302 sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
303 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
304 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
305 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
306 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
307 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
308 sizeof(struct gfs2_meta_header)) /
309 sizeof(struct gfs2_quota_change);
310 sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
311 sizeof(struct gfs2_meta_header))
312 * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
314 /* Compute maximum reservation required to add a entry to a directory */
316 hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH),
320 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
321 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
322 ind_blocks += tmp_blocks;
325 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
327 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
329 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
330 sizeof(struct gfs2_dinode);
331 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
336 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
338 m = do_div(d, sdp->sd_inptrs);
340 if (d != sdp->sd_heightsize[x - 1] || m)
342 sdp->sd_heightsize[x] = space;
344 sdp->sd_max_height = x;
345 sdp->sd_heightsize[x] = ~0;
346 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
348 sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
349 sizeof(struct gfs2_leaf)) /
350 GFS2_MIN_DIRENT_SIZE;
354 static int init_names(struct gfs2_sbd *sdp, int silent)
359 proto = sdp->sd_args.ar_lockproto;
360 table = sdp->sd_args.ar_locktable;
362 /* Try to autodetect */
364 if (!proto[0] || !table[0]) {
365 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
370 proto = sdp->sd_sb.sb_lockproto;
372 table = sdp->sd_sb.sb_locktable;
376 table = sdp->sd_vfs->s_id;
378 strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
379 strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
381 table = sdp->sd_table_name;
382 while ((table = strchr(table, '/')))
388 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
396 error = gfs2_glock_nq_num(sdp,
397 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
398 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
401 fs_err(sdp, "can't acquire mount glock: %d\n", error);
405 error = gfs2_glock_nq_num(sdp,
406 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
408 LM_FLAG_NOEXP | GL_EXACT,
411 fs_err(sdp, "can't acquire live glock: %d\n", error);
415 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
416 CREATE, &sdp->sd_rename_gl);
418 fs_err(sdp, "can't create rename glock: %d\n", error);
422 error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops,
423 CREATE, &sdp->sd_freeze_gl);
425 fs_err(sdp, "can't create transaction glock: %d\n", error);
432 gfs2_glock_put(sdp->sd_freeze_gl);
434 gfs2_glock_put(sdp->sd_rename_gl);
436 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
438 gfs2_glock_dq_uninit(mount_gh);
443 static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
444 u64 no_addr, const char *name)
446 struct gfs2_sbd *sdp = sb->s_fs_info;
447 struct dentry *dentry;
450 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0,
451 GFS2_BLKST_FREE /* ignore */);
453 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
454 return PTR_ERR(inode);
456 dentry = d_make_root(inode);
458 fs_err(sdp, "can't alloc %s dentry\n", name);
465 static int init_sb(struct gfs2_sbd *sdp, int silent)
467 struct super_block *sb = sdp->sd_vfs;
468 struct gfs2_holder sb_gh;
472 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
473 LM_ST_SHARED, 0, &sb_gh);
475 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
479 ret = gfs2_read_sb(sdp, silent);
481 fs_err(sdp, "can't read superblock: %d\n", ret);
485 /* Set up the buffer cache and SB for real */
486 if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
488 fs_err(sdp, "FS block size (%u) is too small for device "
490 sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
493 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
495 fs_err(sdp, "FS block size (%u) is too big for machine "
497 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
500 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
502 /* Get the root inode */
503 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
504 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
508 /* Get the master inode */
509 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
510 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
512 dput(sdp->sd_root_dir);
515 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
517 gfs2_glock_dq_uninit(&sb_gh);
521 static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
523 char *message = "FIRSTMOUNT=Done";
524 char *envp[] = { message, NULL };
526 fs_info(sdp, "first mount done, others may mount\n");
528 if (sdp->sd_lockstruct.ls_ops->lm_first_done)
529 sdp->sd_lockstruct.ls_ops->lm_first_done(sdp);
531 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
535 * gfs2_jindex_hold - Grab a lock on the jindex
536 * @sdp: The GFS2 superblock
537 * @ji_gh: the holder for the jindex glock
542 static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
544 struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
547 struct gfs2_jdesc *jd;
552 mutex_lock(&sdp->sd_jindex_mutex);
555 struct gfs2_inode *jip;
557 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
561 name.len = sprintf(buf, "journal%u", sdp->sd_journals);
562 name.hash = gfs2_disk_hash(name.name, name.len);
564 error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
565 if (error == -ENOENT) {
570 gfs2_glock_dq_uninit(ji_gh);
576 jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
580 INIT_LIST_HEAD(&jd->extent_list);
581 INIT_LIST_HEAD(&jd->jd_revoke_list);
583 INIT_WORK(&jd->jd_work, gfs2_recover_func);
584 jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
585 if (IS_ERR_OR_NULL(jd->jd_inode)) {
589 error = PTR_ERR(jd->jd_inode);
594 spin_lock(&sdp->sd_jindex_spin);
595 jd->jd_jid = sdp->sd_journals++;
596 jip = GFS2_I(jd->jd_inode);
597 jd->jd_no_addr = jip->i_no_addr;
598 list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
599 spin_unlock(&sdp->sd_jindex_spin);
602 mutex_unlock(&sdp->sd_jindex_mutex);
607 static int init_journal(struct gfs2_sbd *sdp, int undo)
609 struct inode *master = d_inode(sdp->sd_master_dir);
610 struct gfs2_holder ji_gh;
611 struct gfs2_inode *ip;
620 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
621 if (IS_ERR(sdp->sd_jindex)) {
622 fs_err(sdp, "can't lookup journal index: %d\n", error);
623 return PTR_ERR(sdp->sd_jindex);
626 /* Load in the journal index special file */
628 error = gfs2_jindex_hold(sdp, &ji_gh);
630 fs_err(sdp, "can't read journal index: %d\n", error);
635 if (!gfs2_jindex_size(sdp)) {
636 fs_err(sdp, "no journals!\n");
640 atomic_set(&sdp->sd_log_blks_needed, 0);
641 if (sdp->sd_args.ar_spectator) {
642 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
643 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
644 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
645 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
647 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
648 fs_err(sdp, "can't mount journal #%u\n",
649 sdp->sd_lockstruct.ls_jid);
650 fs_err(sdp, "there are only %u journals (0 - %u)\n",
651 gfs2_jindex_size(sdp),
652 gfs2_jindex_size(sdp) - 1);
655 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
657 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
660 LM_FLAG_NOEXP | GL_NOCACHE,
661 &sdp->sd_journal_gh);
663 fs_err(sdp, "can't acquire journal glock: %d\n", error);
667 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
668 sdp->sd_jinode_gl = ip->i_gl;
669 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
670 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
673 fs_err(sdp, "can't acquire journal inode glock: %d\n",
675 goto fail_journal_gh;
678 error = gfs2_jdesc_check(sdp->sd_jdesc);
680 fs_err(sdp, "my journal (%u) is bad: %d\n",
681 sdp->sd_jdesc->jd_jid, error);
684 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
685 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
686 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
688 /* Map the extents for this journal's blocks */
689 gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
691 trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
693 if (sdp->sd_lockstruct.ls_first) {
695 for (x = 0; x < sdp->sd_journals; x++) {
696 struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
698 if (sdp->sd_args.ar_spectator) {
699 error = check_journal_clean(sdp, jd, true);
704 error = gfs2_recover_journal(jd, true);
706 fs_err(sdp, "error recovering journal %u: %d\n",
712 gfs2_others_may_mount(sdp);
713 } else if (!sdp->sd_args.ar_spectator) {
714 error = gfs2_recover_journal(sdp->sd_jdesc, true);
716 fs_err(sdp, "error recovering my journal: %d\n", error);
721 sdp->sd_log_idle = 1;
722 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
723 gfs2_glock_dq_uninit(&ji_gh);
725 INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
729 /* A withdraw may have done dq/uninit so now we need to check it */
730 if (!sdp->sd_args.ar_spectator &&
731 gfs2_holder_initialized(&sdp->sd_jinode_gh))
732 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
734 if (!sdp->sd_args.ar_spectator &&
735 gfs2_holder_initialized(&sdp->sd_journal_gh))
736 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
738 gfs2_jindex_free(sdp);
740 gfs2_glock_dq_uninit(&ji_gh);
742 iput(sdp->sd_jindex);
746 static struct lock_class_key gfs2_quota_imutex_key;
748 static int init_inodes(struct gfs2_sbd *sdp, int undo)
751 struct inode *master = d_inode(sdp->sd_master_dir);
756 error = init_journal(sdp, undo);
757 complete_all(&sdp->sd_journal_ready);
761 /* Read in the master statfs inode */
762 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
763 if (IS_ERR(sdp->sd_statfs_inode)) {
764 error = PTR_ERR(sdp->sd_statfs_inode);
765 fs_err(sdp, "can't read in statfs inode: %d\n", error);
769 /* Read in the resource index inode */
770 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
771 if (IS_ERR(sdp->sd_rindex)) {
772 error = PTR_ERR(sdp->sd_rindex);
773 fs_err(sdp, "can't get resource index inode: %d\n", error);
776 sdp->sd_rindex_uptodate = 0;
778 /* Read in the quota inode */
779 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
780 if (IS_ERR(sdp->sd_quota_inode)) {
781 error = PTR_ERR(sdp->sd_quota_inode);
782 fs_err(sdp, "can't get quota file inode: %d\n", error);
786 * i_rwsem on quota files is special. Since this inode is hidden system
787 * file, we are safe to define locking ourselves.
789 lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
790 &gfs2_quota_imutex_key);
792 error = gfs2_rindex_update(sdp);
799 iput(sdp->sd_quota_inode);
801 gfs2_clear_rgrpd(sdp);
802 iput(sdp->sd_rindex);
804 iput(sdp->sd_statfs_inode);
806 init_journal(sdp, UNDO);
811 static int init_per_node(struct gfs2_sbd *sdp, int undo)
813 struct inode *pn = NULL;
816 struct gfs2_inode *ip;
817 struct inode *master = d_inode(sdp->sd_master_dir);
819 if (sdp->sd_args.ar_spectator)
825 pn = gfs2_lookup_simple(master, "per_node");
828 fs_err(sdp, "can't find per_node directory: %d\n", error);
832 sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
833 sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
834 if (IS_ERR(sdp->sd_sc_inode)) {
835 error = PTR_ERR(sdp->sd_sc_inode);
836 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
840 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
841 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
842 if (IS_ERR(sdp->sd_qc_inode)) {
843 error = PTR_ERR(sdp->sd_qc_inode);
844 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
851 ip = GFS2_I(sdp->sd_sc_inode);
852 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
855 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
859 ip = GFS2_I(sdp->sd_qc_inode);
860 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
863 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
870 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
872 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
874 iput(sdp->sd_qc_inode);
876 iput(sdp->sd_sc_inode);
882 static const match_table_t nolock_tokens = {
883 { Opt_jid, "jid=%d\n", },
887 static const struct lm_lockops nolock_ops = {
888 .lm_proto_name = "lock_nolock",
889 .lm_put_lock = gfs2_glock_free,
890 .lm_tokens = &nolock_tokens,
894 * gfs2_lm_mount - mount a locking protocol
895 * @sdp: the filesystem
896 * @args: mount arguments
897 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
902 static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
904 const struct lm_lockops *lm;
905 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
906 struct gfs2_args *args = &sdp->sd_args;
907 const char *proto = sdp->sd_proto_name;
908 const char *table = sdp->sd_table_name;
912 if (!strcmp("lock_nolock", proto)) {
914 sdp->sd_args.ar_localflocks = 1;
915 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
916 } else if (!strcmp("lock_dlm", proto)) {
920 pr_info("can't find protocol %s\n", proto);
924 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
929 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
930 substring_t tmp[MAX_OPT_ARGS];
936 token = match_token(o, *lm->lm_tokens, tmp);
939 ret = match_int(&tmp[0], &option);
940 if (ret || option < 0)
942 if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
947 /* Obsolete, but left for backward compat purposes */
950 ret = match_int(&tmp[0], &option);
951 if (ret || (option != 0 && option != 1))
953 ls->ls_first = option;
958 fs_info(sdp, "unknown hostdata (%s)\n", o);
963 if (lm->lm_mount == NULL) {
964 fs_info(sdp, "Now mounting FS...\n");
965 complete_all(&sdp->sd_locking_init);
968 ret = lm->lm_mount(sdp, table);
970 fs_info(sdp, "Joined cluster. Now mounting FS...\n");
971 complete_all(&sdp->sd_locking_init);
975 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
977 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
978 if (likely(!gfs2_withdrawn(sdp)) && lm->lm_unmount)
982 static int wait_on_journal(struct gfs2_sbd *sdp)
984 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
987 return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
991 void gfs2_online_uevent(struct gfs2_sbd *sdp)
993 struct super_block *sb = sdp->sd_vfs;
996 char *envp[] = { ro, spectator, NULL };
997 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
998 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
999 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
1003 * gfs2_fill_super - Read in superblock
1004 * @sb: The VFS superblock
1005 * @args: Mount options
1006 * @silent: Don't complain if it's not a GFS2 filesystem
1010 static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
1012 struct gfs2_args *args = fc->fs_private;
1013 int silent = fc->sb_flags & SB_SILENT;
1014 struct gfs2_sbd *sdp;
1015 struct gfs2_holder mount_gh;
1020 pr_warn("can't alloc struct gfs2_sbd\n");
1023 sdp->sd_args = *args;
1025 if (sdp->sd_args.ar_spectator) {
1026 sb->s_flags |= SB_RDONLY;
1027 set_bit(SDF_RORECOVERY, &sdp->sd_flags);
1029 if (sdp->sd_args.ar_posix_acl)
1030 sb->s_flags |= SB_POSIXACL;
1031 if (sdp->sd_args.ar_nobarrier)
1032 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1034 sb->s_flags |= SB_NOSEC;
1035 sb->s_magic = GFS2_MAGIC;
1036 sb->s_op = &gfs2_super_ops;
1037 sb->s_d_op = &gfs2_dops;
1038 sb->s_export_op = &gfs2_export_ops;
1039 sb->s_xattr = gfs2_xattr_handlers;
1040 sb->s_qcop = &gfs2_quotactl_ops;
1041 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1042 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1043 sb->s_time_gran = 1;
1044 sb->s_maxbytes = MAX_LFS_FILESIZE;
1046 /* Set up the buffer cache and fill in some fake block size values
1047 to allow us to read-in the on-disk superblock. */
1048 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1049 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1050 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1051 GFS2_BASIC_BLOCK_SHIFT;
1052 sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
1054 sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
1055 sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
1056 if (sdp->sd_args.ar_statfs_quantum) {
1057 sdp->sd_tune.gt_statfs_slow = 0;
1058 sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
1060 sdp->sd_tune.gt_statfs_slow = 1;
1061 sdp->sd_tune.gt_statfs_quantum = 30;
1064 error = init_names(sdp, silent);
1066 /* In this case, we haven't initialized sysfs, so we have to
1067 manually free the sdp. */
1069 sb->s_fs_info = NULL;
1073 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
1075 error = gfs2_sys_fs_add(sdp);
1077 * If we hit an error here, gfs2_sys_fs_add will have called function
1078 * kobject_put which causes the sysfs usage count to go to zero, which
1079 * causes sysfs to call function gfs2_sbd_release, which frees sdp.
1080 * Subsequent error paths here will call gfs2_sys_fs_del, which also
1081 * kobject_put to free sdp.
1086 gfs2_create_debugfs_file(sdp);
1088 error = gfs2_lm_mount(sdp, silent);
1092 error = init_locking(sdp, &mount_gh, DO);
1096 error = init_sb(sdp, silent);
1100 error = wait_on_journal(sdp);
1105 * If user space has failed to join the cluster or some similar
1106 * failure has occurred, then the journal id will contain a
1107 * negative (error) number. This will then be returned to the
1108 * caller (of the mount syscall). We do this even for spectator
1109 * mounts (which just write a jid of 0 to indicate "ok" even though
1110 * the jid is unused in the spectator case)
1112 if (sdp->sd_lockstruct.ls_jid < 0) {
1113 error = sdp->sd_lockstruct.ls_jid;
1114 sdp->sd_lockstruct.ls_jid = 0;
1118 if (sdp->sd_args.ar_spectator)
1119 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s",
1120 sdp->sd_table_name);
1122 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u",
1123 sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
1125 error = init_inodes(sdp, DO);
1129 error = init_per_node(sdp, DO);
1133 error = gfs2_statfs_init(sdp);
1135 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1139 if (!sb_rdonly(sb)) {
1140 error = gfs2_make_fs_rw(sdp);
1142 fs_err(sdp, "can't make FS RW: %d\n", error);
1147 gfs2_glock_dq_uninit(&mount_gh);
1148 gfs2_online_uevent(sdp);
1152 init_per_node(sdp, UNDO);
1154 init_inodes(sdp, UNDO);
1156 if (sdp->sd_root_dir)
1157 dput(sdp->sd_root_dir);
1158 if (sdp->sd_master_dir)
1159 dput(sdp->sd_master_dir);
1164 init_locking(sdp, &mount_gh, UNDO);
1166 complete_all(&sdp->sd_journal_ready);
1167 gfs2_gl_hash_clear(sdp);
1168 gfs2_lm_unmount(sdp);
1170 gfs2_delete_debugfs_file(sdp);
1171 /* gfs2_sys_fs_del must be the last thing we do, since it causes
1172 * sysfs to call function gfs2_sbd_release, which frees sdp. */
1173 gfs2_sys_fs_del(sdp);
1174 sb->s_fs_info = NULL;
1179 * gfs2_get_tree - Get the GFS2 superblock and root directory
1180 * @fc: The filesystem context
1182 * Returns: 0 or -errno on error
1184 static int gfs2_get_tree(struct fs_context *fc)
1186 struct gfs2_args *args = fc->fs_private;
1187 struct gfs2_sbd *sdp;
1190 error = get_tree_bdev(fc, gfs2_fill_super);
1194 sdp = fc->root->d_sb->s_fs_info;
1197 fc->root = dget(sdp->sd_master_dir);
1199 fc->root = dget(sdp->sd_root_dir);
1203 static void gfs2_fc_free(struct fs_context *fc)
1205 struct gfs2_args *args = fc->fs_private;
1215 Opt_ignore_local_fs,
1237 static const struct constant_table gfs2_param_quota[] = {
1238 {"off", GFS2_QUOTA_OFF},
1239 {"account", GFS2_QUOTA_ACCOUNT},
1240 {"on", GFS2_QUOTA_ON},
1245 Opt_data_writeback = GFS2_DATA_WRITEBACK,
1246 Opt_data_ordered = GFS2_DATA_ORDERED,
1249 static const struct constant_table gfs2_param_data[] = {
1250 {"writeback", Opt_data_writeback },
1251 {"ordered", Opt_data_ordered },
1256 Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
1257 Opt_errors_panic = GFS2_ERRORS_PANIC,
1260 static const struct constant_table gfs2_param_errors[] = {
1261 {"withdraw", Opt_errors_withdraw },
1262 {"panic", Opt_errors_panic },
1266 static const struct fs_parameter_spec gfs2_fs_parameters[] = {
1267 fsparam_string ("lockproto", Opt_lockproto),
1268 fsparam_string ("locktable", Opt_locktable),
1269 fsparam_string ("hostdata", Opt_hostdata),
1270 fsparam_flag ("spectator", Opt_spectator),
1271 fsparam_flag ("norecovery", Opt_spectator),
1272 fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
1273 fsparam_flag ("localflocks", Opt_localflocks),
1274 fsparam_flag ("localcaching", Opt_localcaching),
1275 fsparam_flag_no("debug", Opt_debug),
1276 fsparam_flag ("upgrade", Opt_upgrade),
1277 fsparam_flag_no("acl", Opt_acl),
1278 fsparam_flag_no("suiddir", Opt_suiddir),
1279 fsparam_enum ("data", Opt_data, gfs2_param_data),
1280 fsparam_flag ("meta", Opt_meta),
1281 fsparam_flag_no("discard", Opt_discard),
1282 fsparam_s32 ("commit", Opt_commit),
1283 fsparam_enum ("errors", Opt_errors, gfs2_param_errors),
1284 fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
1285 fsparam_s32 ("statfs_percent", Opt_statfs_percent),
1286 fsparam_s32 ("quota_quantum", Opt_quota_quantum),
1287 fsparam_flag_no("barrier", Opt_barrier),
1288 fsparam_flag_no("rgrplvb", Opt_rgrplvb),
1289 fsparam_flag_no("loccookie", Opt_loccookie),
1290 /* quota can be a flag or an enum so it gets special treatment */
1291 fsparam_flag_no("quota", Opt_quota_flag),
1292 fsparam_enum("quota", Opt_quota, gfs2_param_quota),
1296 /* Parse a single mount parameter */
1297 static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
1299 struct gfs2_args *args = fc->fs_private;
1300 struct fs_parse_result result;
1303 o = fs_parse(fc, gfs2_fs_parameters, param, &result);
1309 strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
1312 strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
1315 strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
1318 args->ar_spectator = 1;
1320 case Opt_ignore_local_fs:
1321 /* Retained for backwards compat only */
1323 case Opt_localflocks:
1324 args->ar_localflocks = 1;
1326 case Opt_localcaching:
1327 /* Retained for backwards compat only */
1330 if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
1331 return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
1332 args->ar_debug = result.boolean;
1335 /* Retained for backwards compat only */
1338 args->ar_posix_acl = result.boolean;
1340 case Opt_quota_flag:
1341 args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON;
1344 args->ar_quota = result.int_32;
1347 args->ar_suiddir = result.boolean;
1350 /* The uint_32 result maps directly to GFS2_DATA_* */
1351 args->ar_data = result.uint_32;
1357 args->ar_discard = result.boolean;
1360 if (result.int_32 <= 0)
1361 return invalfc(fc, "commit mount option requires a positive numeric argument");
1362 args->ar_commit = result.int_32;
1364 case Opt_statfs_quantum:
1365 if (result.int_32 < 0)
1366 return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument");
1367 args->ar_statfs_quantum = result.int_32;
1369 case Opt_quota_quantum:
1370 if (result.int_32 <= 0)
1371 return invalfc(fc, "quota_quantum mount option requires a positive numeric argument");
1372 args->ar_quota_quantum = result.int_32;
1374 case Opt_statfs_percent:
1375 if (result.int_32 < 0 || result.int_32 > 100)
1376 return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100");
1377 args->ar_statfs_percent = result.int_32;
1380 if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
1381 return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
1382 args->ar_errors = result.uint_32;
1385 args->ar_nobarrier = result.boolean;
1388 args->ar_rgrplvb = result.boolean;
1391 args->ar_loccookie = result.boolean;
1394 return invalfc(fc, "invalid mount option: %s", param->key);
1399 static int gfs2_reconfigure(struct fs_context *fc)
1401 struct super_block *sb = fc->root->d_sb;
1402 struct gfs2_sbd *sdp = sb->s_fs_info;
1403 struct gfs2_args *oldargs = &sdp->sd_args;
1404 struct gfs2_args *newargs = fc->fs_private;
1405 struct gfs2_tune *gt = &sdp->sd_tune;
1408 sync_filesystem(sb);
1410 spin_lock(>->gt_spin);
1411 oldargs->ar_commit = gt->gt_logd_secs;
1412 oldargs->ar_quota_quantum = gt->gt_quota_quantum;
1413 if (gt->gt_statfs_slow)
1414 oldargs->ar_statfs_quantum = 0;
1416 oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
1417 spin_unlock(>->gt_spin);
1419 if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
1420 errorfc(fc, "reconfiguration of locking protocol not allowed");
1423 if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
1424 errorfc(fc, "reconfiguration of lock table not allowed");
1427 if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
1428 errorfc(fc, "reconfiguration of host data not allowed");
1431 if (newargs->ar_spectator != oldargs->ar_spectator) {
1432 errorfc(fc, "reconfiguration of spectator mode not allowed");
1435 if (newargs->ar_localflocks != oldargs->ar_localflocks) {
1436 errorfc(fc, "reconfiguration of localflocks not allowed");
1439 if (newargs->ar_meta != oldargs->ar_meta) {
1440 errorfc(fc, "switching between gfs2 and gfs2meta not allowed");
1443 if (oldargs->ar_spectator)
1444 fc->sb_flags |= SB_RDONLY;
1446 if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
1447 if (fc->sb_flags & SB_RDONLY) {
1448 error = gfs2_make_fs_ro(sdp);
1450 errorfc(fc, "unable to remount read-only");
1452 error = gfs2_make_fs_rw(sdp);
1454 errorfc(fc, "unable to remount read-write");
1457 sdp->sd_args = *newargs;
1459 if (sdp->sd_args.ar_posix_acl)
1460 sb->s_flags |= SB_POSIXACL;
1462 sb->s_flags &= ~SB_POSIXACL;
1463 if (sdp->sd_args.ar_nobarrier)
1464 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1466 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1467 spin_lock(>->gt_spin);
1468 gt->gt_logd_secs = newargs->ar_commit;
1469 gt->gt_quota_quantum = newargs->ar_quota_quantum;
1470 if (newargs->ar_statfs_quantum) {
1471 gt->gt_statfs_slow = 0;
1472 gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
1475 gt->gt_statfs_slow = 1;
1476 gt->gt_statfs_quantum = 30;
1478 spin_unlock(>->gt_spin);
1480 gfs2_online_uevent(sdp);
1484 static const struct fs_context_operations gfs2_context_ops = {
1485 .free = gfs2_fc_free,
1486 .parse_param = gfs2_parse_param,
1487 .get_tree = gfs2_get_tree,
1488 .reconfigure = gfs2_reconfigure,
1491 /* Set up the filesystem mount context */
1492 static int gfs2_init_fs_context(struct fs_context *fc)
1494 struct gfs2_args *args;
1496 args = kmalloc(sizeof(*args), GFP_KERNEL);
1500 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
1501 struct gfs2_sbd *sdp = fc->root->d_sb->s_fs_info;
1503 *args = sdp->sd_args;
1505 memset(args, 0, sizeof(*args));
1506 args->ar_quota = GFS2_QUOTA_DEFAULT;
1507 args->ar_data = GFS2_DATA_DEFAULT;
1508 args->ar_commit = 30;
1509 args->ar_statfs_quantum = 30;
1510 args->ar_quota_quantum = 60;
1511 args->ar_errors = GFS2_ERRORS_DEFAULT;
1513 fc->fs_private = args;
1514 fc->ops = &gfs2_context_ops;
1518 static int set_meta_super(struct super_block *s, struct fs_context *fc)
1523 static int test_meta_super(struct super_block *s, struct fs_context *fc)
1525 return (fc->sget_key == s->s_bdev);
1528 static int gfs2_meta_get_tree(struct fs_context *fc)
1530 struct super_block *s;
1531 struct gfs2_sbd *sdp;
1535 if (!fc->source || !*fc->source)
1538 error = kern_path(fc->source, LOOKUP_FOLLOW, &path);
1540 pr_warn("path_lookup on %s returned error %d\n",
1544 fc->fs_type = &gfs2_fs_type;
1545 fc->sget_key = path.dentry->d_sb->s_bdev;
1546 s = sget_fc(fc, test_meta_super, set_meta_super);
1549 pr_warn("gfs2 mount does not exist\n");
1552 if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
1553 deactivate_locked_super(s);
1557 fc->root = dget(sdp->sd_master_dir);
1561 static const struct fs_context_operations gfs2_meta_context_ops = {
1562 .free = gfs2_fc_free,
1563 .get_tree = gfs2_meta_get_tree,
1566 static int gfs2_meta_init_fs_context(struct fs_context *fc)
1568 int ret = gfs2_init_fs_context(fc);
1573 fc->ops = &gfs2_meta_context_ops;
1577 static void gfs2_kill_sb(struct super_block *sb)
1579 struct gfs2_sbd *sdp = sb->s_fs_info;
1582 kill_block_super(sb);
1586 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB);
1587 dput(sdp->sd_root_dir);
1588 dput(sdp->sd_master_dir);
1589 sdp->sd_root_dir = NULL;
1590 sdp->sd_master_dir = NULL;
1591 shrink_dcache_sb(sb);
1592 kill_block_super(sb);
1595 struct file_system_type gfs2_fs_type = {
1597 .fs_flags = FS_REQUIRES_DEV,
1598 .init_fs_context = gfs2_init_fs_context,
1599 .parameters = gfs2_fs_parameters,
1600 .kill_sb = gfs2_kill_sb,
1601 .owner = THIS_MODULE,
1603 MODULE_ALIAS_FS("gfs2");
1605 struct file_system_type gfs2meta_fs_type = {
1607 .fs_flags = FS_REQUIRES_DEV,
1608 .init_fs_context = gfs2_meta_init_fs_context,
1609 .owner = THIS_MODULE,
1611 MODULE_ALIAS_FS("gfs2meta");