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_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
302 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
303 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
304 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
305 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
306 sizeof(struct gfs2_meta_header)) /
307 sizeof(struct gfs2_quota_change);
308 sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
309 sizeof(struct gfs2_meta_header))
310 * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
312 /* Compute maximum reservation required to add a entry to a directory */
314 hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH),
318 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
319 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
320 ind_blocks += tmp_blocks;
323 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
325 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
327 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
328 sizeof(struct gfs2_dinode);
329 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
334 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
336 m = do_div(d, sdp->sd_inptrs);
338 if (d != sdp->sd_heightsize[x - 1] || m)
340 sdp->sd_heightsize[x] = space;
342 sdp->sd_max_height = x;
343 sdp->sd_heightsize[x] = ~0;
344 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
346 sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
347 sizeof(struct gfs2_leaf)) /
348 GFS2_MIN_DIRENT_SIZE;
352 static int init_names(struct gfs2_sbd *sdp, int silent)
357 proto = sdp->sd_args.ar_lockproto;
358 table = sdp->sd_args.ar_locktable;
360 /* Try to autodetect */
362 if (!proto[0] || !table[0]) {
363 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
368 proto = sdp->sd_sb.sb_lockproto;
370 table = sdp->sd_sb.sb_locktable;
374 table = sdp->sd_vfs->s_id;
376 strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
377 strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
379 table = sdp->sd_table_name;
380 while ((table = strchr(table, '/')))
386 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
394 error = gfs2_glock_nq_num(sdp,
395 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
396 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
399 fs_err(sdp, "can't acquire mount glock: %d\n", error);
403 error = gfs2_glock_nq_num(sdp,
404 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
406 LM_FLAG_NOEXP | GL_EXACT,
409 fs_err(sdp, "can't acquire live glock: %d\n", error);
413 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
414 CREATE, &sdp->sd_rename_gl);
416 fs_err(sdp, "can't create rename glock: %d\n", error);
420 error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops,
421 CREATE, &sdp->sd_freeze_gl);
423 fs_err(sdp, "can't create transaction glock: %d\n", error);
430 gfs2_glock_put(sdp->sd_freeze_gl);
432 gfs2_glock_put(sdp->sd_rename_gl);
434 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
436 gfs2_glock_dq_uninit(mount_gh);
441 static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
442 u64 no_addr, const char *name)
444 struct gfs2_sbd *sdp = sb->s_fs_info;
445 struct dentry *dentry;
448 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0,
449 GFS2_BLKST_FREE /* ignore */);
451 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
452 return PTR_ERR(inode);
454 dentry = d_make_root(inode);
456 fs_err(sdp, "can't alloc %s dentry\n", name);
463 static int init_sb(struct gfs2_sbd *sdp, int silent)
465 struct super_block *sb = sdp->sd_vfs;
466 struct gfs2_holder sb_gh;
470 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
471 LM_ST_SHARED, 0, &sb_gh);
473 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
477 ret = gfs2_read_sb(sdp, silent);
479 fs_err(sdp, "can't read superblock: %d\n", ret);
483 /* Set up the buffer cache and SB for real */
484 if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
486 fs_err(sdp, "FS block size (%u) is too small for device "
488 sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
491 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
493 fs_err(sdp, "FS block size (%u) is too big for machine "
495 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
498 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
500 /* Get the root inode */
501 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
502 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
506 /* Get the master inode */
507 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
508 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
510 dput(sdp->sd_root_dir);
513 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
515 gfs2_glock_dq_uninit(&sb_gh);
519 static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
521 char *message = "FIRSTMOUNT=Done";
522 char *envp[] = { message, NULL };
524 fs_info(sdp, "first mount done, others may mount\n");
526 if (sdp->sd_lockstruct.ls_ops->lm_first_done)
527 sdp->sd_lockstruct.ls_ops->lm_first_done(sdp);
529 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
533 * gfs2_jindex_hold - Grab a lock on the jindex
534 * @sdp: The GFS2 superblock
535 * @ji_gh: the holder for the jindex glock
540 static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
542 struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
545 struct gfs2_jdesc *jd;
550 mutex_lock(&sdp->sd_jindex_mutex);
553 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
557 name.len = sprintf(buf, "journal%u", sdp->sd_journals);
558 name.hash = gfs2_disk_hash(name.name, name.len);
560 error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
561 if (error == -ENOENT) {
566 gfs2_glock_dq_uninit(ji_gh);
572 jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
576 INIT_LIST_HEAD(&jd->extent_list);
577 INIT_LIST_HEAD(&jd->jd_revoke_list);
579 INIT_WORK(&jd->jd_work, gfs2_recover_func);
580 jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
581 if (IS_ERR_OR_NULL(jd->jd_inode)) {
585 error = PTR_ERR(jd->jd_inode);
590 spin_lock(&sdp->sd_jindex_spin);
591 jd->jd_jid = sdp->sd_journals++;
592 list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
593 spin_unlock(&sdp->sd_jindex_spin);
596 mutex_unlock(&sdp->sd_jindex_mutex);
602 * check_journal_clean - Make sure a journal is clean for a spectator mount
603 * @sdp: The GFS2 superblock
604 * @jd: The journal descriptor
606 * Returns: 0 if the journal is clean or locked, else an error
608 static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
611 struct gfs2_holder j_gh;
612 struct gfs2_log_header_host head;
613 struct gfs2_inode *ip;
615 ip = GFS2_I(jd->jd_inode);
616 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
617 GL_EXACT | GL_NOCACHE, &j_gh);
619 fs_err(sdp, "Error locking journal for spectator mount.\n");
622 error = gfs2_jdesc_check(jd);
624 fs_err(sdp, "Error checking journal for spectator mount.\n");
627 error = gfs2_find_jhead(jd, &head, false);
629 fs_err(sdp, "Error parsing journal for spectator mount.\n");
632 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
634 fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
635 "must not be a spectator.\n", jd->jd_jid);
639 gfs2_glock_dq_uninit(&j_gh);
643 static int init_journal(struct gfs2_sbd *sdp, int undo)
645 struct inode *master = d_inode(sdp->sd_master_dir);
646 struct gfs2_holder ji_gh;
647 struct gfs2_inode *ip;
656 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
657 if (IS_ERR(sdp->sd_jindex)) {
658 fs_err(sdp, "can't lookup journal index: %d\n", error);
659 return PTR_ERR(sdp->sd_jindex);
662 /* Load in the journal index special file */
664 error = gfs2_jindex_hold(sdp, &ji_gh);
666 fs_err(sdp, "can't read journal index: %d\n", error);
671 if (!gfs2_jindex_size(sdp)) {
672 fs_err(sdp, "no journals!\n");
676 atomic_set(&sdp->sd_log_blks_needed, 0);
677 if (sdp->sd_args.ar_spectator) {
678 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
679 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
680 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
681 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
683 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
684 fs_err(sdp, "can't mount journal #%u\n",
685 sdp->sd_lockstruct.ls_jid);
686 fs_err(sdp, "there are only %u journals (0 - %u)\n",
687 gfs2_jindex_size(sdp),
688 gfs2_jindex_size(sdp) - 1);
691 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
693 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
695 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
696 &sdp->sd_journal_gh);
698 fs_err(sdp, "can't acquire journal glock: %d\n", error);
702 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
703 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
704 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
707 fs_err(sdp, "can't acquire journal inode glock: %d\n",
709 goto fail_journal_gh;
712 error = gfs2_jdesc_check(sdp->sd_jdesc);
714 fs_err(sdp, "my journal (%u) is bad: %d\n",
715 sdp->sd_jdesc->jd_jid, error);
718 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
719 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
720 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
722 /* Map the extents for this journal's blocks */
723 gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
725 trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
727 if (sdp->sd_lockstruct.ls_first) {
729 for (x = 0; x < sdp->sd_journals; x++) {
730 struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
732 if (sdp->sd_args.ar_spectator) {
733 error = check_journal_clean(sdp, jd);
738 error = gfs2_recover_journal(jd, true);
740 fs_err(sdp, "error recovering journal %u: %d\n",
746 gfs2_others_may_mount(sdp);
747 } else if (!sdp->sd_args.ar_spectator) {
748 error = gfs2_recover_journal(sdp->sd_jdesc, true);
750 fs_err(sdp, "error recovering my journal: %d\n", error);
755 sdp->sd_log_idle = 1;
756 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
757 gfs2_glock_dq_uninit(&ji_gh);
759 INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
763 if (!sdp->sd_args.ar_spectator)
764 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
766 if (!sdp->sd_args.ar_spectator)
767 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
769 gfs2_jindex_free(sdp);
771 gfs2_glock_dq_uninit(&ji_gh);
773 iput(sdp->sd_jindex);
777 static struct lock_class_key gfs2_quota_imutex_key;
779 static int init_inodes(struct gfs2_sbd *sdp, int undo)
782 struct inode *master = d_inode(sdp->sd_master_dir);
787 error = init_journal(sdp, undo);
788 complete_all(&sdp->sd_journal_ready);
792 /* Read in the master statfs inode */
793 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
794 if (IS_ERR(sdp->sd_statfs_inode)) {
795 error = PTR_ERR(sdp->sd_statfs_inode);
796 fs_err(sdp, "can't read in statfs inode: %d\n", error);
800 /* Read in the resource index inode */
801 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
802 if (IS_ERR(sdp->sd_rindex)) {
803 error = PTR_ERR(sdp->sd_rindex);
804 fs_err(sdp, "can't get resource index inode: %d\n", error);
807 sdp->sd_rindex_uptodate = 0;
809 /* Read in the quota inode */
810 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
811 if (IS_ERR(sdp->sd_quota_inode)) {
812 error = PTR_ERR(sdp->sd_quota_inode);
813 fs_err(sdp, "can't get quota file inode: %d\n", error);
817 * i_rwsem on quota files is special. Since this inode is hidden system
818 * file, we are safe to define locking ourselves.
820 lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
821 &gfs2_quota_imutex_key);
823 error = gfs2_rindex_update(sdp);
830 iput(sdp->sd_quota_inode);
832 gfs2_clear_rgrpd(sdp);
833 iput(sdp->sd_rindex);
835 iput(sdp->sd_statfs_inode);
837 init_journal(sdp, UNDO);
842 static int init_per_node(struct gfs2_sbd *sdp, int undo)
844 struct inode *pn = NULL;
847 struct gfs2_inode *ip;
848 struct inode *master = d_inode(sdp->sd_master_dir);
850 if (sdp->sd_args.ar_spectator)
856 pn = gfs2_lookup_simple(master, "per_node");
859 fs_err(sdp, "can't find per_node directory: %d\n", error);
863 sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
864 sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
865 if (IS_ERR(sdp->sd_sc_inode)) {
866 error = PTR_ERR(sdp->sd_sc_inode);
867 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
871 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
872 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
873 if (IS_ERR(sdp->sd_qc_inode)) {
874 error = PTR_ERR(sdp->sd_qc_inode);
875 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
882 ip = GFS2_I(sdp->sd_sc_inode);
883 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
886 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
890 ip = GFS2_I(sdp->sd_qc_inode);
891 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
894 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
901 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
903 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
905 iput(sdp->sd_qc_inode);
907 iput(sdp->sd_sc_inode);
913 static const match_table_t nolock_tokens = {
914 { Opt_jid, "jid=%d\n", },
918 static const struct lm_lockops nolock_ops = {
919 .lm_proto_name = "lock_nolock",
920 .lm_put_lock = gfs2_glock_free,
921 .lm_tokens = &nolock_tokens,
925 * gfs2_lm_mount - mount a locking protocol
926 * @sdp: the filesystem
927 * @args: mount arguments
928 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
933 static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
935 const struct lm_lockops *lm;
936 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
937 struct gfs2_args *args = &sdp->sd_args;
938 const char *proto = sdp->sd_proto_name;
939 const char *table = sdp->sd_table_name;
943 if (!strcmp("lock_nolock", proto)) {
945 sdp->sd_args.ar_localflocks = 1;
946 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
947 } else if (!strcmp("lock_dlm", proto)) {
951 pr_info("can't find protocol %s\n", proto);
955 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
960 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
961 substring_t tmp[MAX_OPT_ARGS];
967 token = match_token(o, *lm->lm_tokens, tmp);
970 ret = match_int(&tmp[0], &option);
971 if (ret || option < 0)
973 if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
978 /* Obsolete, but left for backward compat purposes */
981 ret = match_int(&tmp[0], &option);
982 if (ret || (option != 0 && option != 1))
984 ls->ls_first = option;
989 fs_info(sdp, "unknown hostdata (%s)\n", o);
994 if (lm->lm_mount == NULL) {
995 fs_info(sdp, "Now mounting FS...\n");
996 complete_all(&sdp->sd_locking_init);
999 ret = lm->lm_mount(sdp, table);
1001 fs_info(sdp, "Joined cluster. Now mounting FS...\n");
1002 complete_all(&sdp->sd_locking_init);
1006 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1008 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
1009 if (likely(!test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) &&
1011 lm->lm_unmount(sdp);
1014 static int wait_on_journal(struct gfs2_sbd *sdp)
1016 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
1019 return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
1023 void gfs2_online_uevent(struct gfs2_sbd *sdp)
1025 struct super_block *sb = sdp->sd_vfs;
1028 char *envp[] = { ro, spectator, NULL };
1029 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
1030 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
1031 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
1035 * gfs2_fill_super - Read in superblock
1036 * @sb: The VFS superblock
1037 * @args: Mount options
1038 * @silent: Don't complain if it's not a GFS2 filesystem
1042 static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
1044 struct gfs2_args *args = fc->fs_private;
1045 int silent = fc->sb_flags & SB_SILENT;
1046 struct gfs2_sbd *sdp;
1047 struct gfs2_holder mount_gh;
1052 pr_warn("can't alloc struct gfs2_sbd\n");
1055 sdp->sd_args = *args;
1057 if (sdp->sd_args.ar_spectator) {
1058 sb->s_flags |= SB_RDONLY;
1059 set_bit(SDF_RORECOVERY, &sdp->sd_flags);
1061 if (sdp->sd_args.ar_posix_acl)
1062 sb->s_flags |= SB_POSIXACL;
1063 if (sdp->sd_args.ar_nobarrier)
1064 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1066 sb->s_flags |= SB_NOSEC;
1067 sb->s_magic = GFS2_MAGIC;
1068 sb->s_op = &gfs2_super_ops;
1069 sb->s_d_op = &gfs2_dops;
1070 sb->s_export_op = &gfs2_export_ops;
1071 sb->s_xattr = gfs2_xattr_handlers;
1072 sb->s_qcop = &gfs2_quotactl_ops;
1073 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1074 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1075 sb->s_time_gran = 1;
1076 sb->s_maxbytes = MAX_LFS_FILESIZE;
1078 /* Set up the buffer cache and fill in some fake block size values
1079 to allow us to read-in the on-disk superblock. */
1080 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1081 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1082 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1083 GFS2_BASIC_BLOCK_SHIFT;
1084 sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
1086 sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
1087 sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
1088 if (sdp->sd_args.ar_statfs_quantum) {
1089 sdp->sd_tune.gt_statfs_slow = 0;
1090 sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
1092 sdp->sd_tune.gt_statfs_slow = 1;
1093 sdp->sd_tune.gt_statfs_quantum = 30;
1096 error = init_names(sdp, silent);
1098 /* In this case, we haven't initialized sysfs, so we have to
1099 manually free the sdp. */
1101 sb->s_fs_info = NULL;
1105 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
1107 error = gfs2_sys_fs_add(sdp);
1109 * If we hit an error here, gfs2_sys_fs_add will have called function
1110 * kobject_put which causes the sysfs usage count to go to zero, which
1111 * causes sysfs to call function gfs2_sbd_release, which frees sdp.
1112 * Subsequent error paths here will call gfs2_sys_fs_del, which also
1113 * kobject_put to free sdp.
1118 gfs2_create_debugfs_file(sdp);
1120 error = gfs2_lm_mount(sdp, silent);
1124 error = init_locking(sdp, &mount_gh, DO);
1128 error = init_sb(sdp, silent);
1132 error = wait_on_journal(sdp);
1137 * If user space has failed to join the cluster or some similar
1138 * failure has occurred, then the journal id will contain a
1139 * negative (error) number. This will then be returned to the
1140 * caller (of the mount syscall). We do this even for spectator
1141 * mounts (which just write a jid of 0 to indicate "ok" even though
1142 * the jid is unused in the spectator case)
1144 if (sdp->sd_lockstruct.ls_jid < 0) {
1145 error = sdp->sd_lockstruct.ls_jid;
1146 sdp->sd_lockstruct.ls_jid = 0;
1150 if (sdp->sd_args.ar_spectator)
1151 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s",
1152 sdp->sd_table_name);
1154 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u",
1155 sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
1157 error = init_inodes(sdp, DO);
1161 error = init_per_node(sdp, DO);
1165 error = gfs2_statfs_init(sdp);
1167 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1171 if (!sb_rdonly(sb)) {
1172 error = gfs2_make_fs_rw(sdp);
1174 fs_err(sdp, "can't make FS RW: %d\n", error);
1179 gfs2_glock_dq_uninit(&mount_gh);
1180 gfs2_online_uevent(sdp);
1184 init_per_node(sdp, UNDO);
1186 init_inodes(sdp, UNDO);
1188 if (sdp->sd_root_dir)
1189 dput(sdp->sd_root_dir);
1190 if (sdp->sd_master_dir)
1191 dput(sdp->sd_master_dir);
1196 init_locking(sdp, &mount_gh, UNDO);
1198 complete_all(&sdp->sd_journal_ready);
1199 gfs2_gl_hash_clear(sdp);
1200 gfs2_lm_unmount(sdp);
1202 gfs2_delete_debugfs_file(sdp);
1203 /* gfs2_sys_fs_del must be the last thing we do, since it causes
1204 * sysfs to call function gfs2_sbd_release, which frees sdp. */
1205 gfs2_sys_fs_del(sdp);
1206 sb->s_fs_info = NULL;
1211 * gfs2_get_tree - Get the GFS2 superblock and root directory
1212 * @fc: The filesystem context
1214 * Returns: 0 or -errno on error
1216 static int gfs2_get_tree(struct fs_context *fc)
1218 struct gfs2_args *args = fc->fs_private;
1219 struct gfs2_sbd *sdp;
1222 error = get_tree_bdev(fc, gfs2_fill_super);
1226 sdp = fc->root->d_sb->s_fs_info;
1229 fc->root = dget(sdp->sd_master_dir);
1231 fc->root = dget(sdp->sd_root_dir);
1235 static void gfs2_fc_free(struct fs_context *fc)
1237 struct gfs2_args *args = fc->fs_private;
1247 Opt_ignore_local_fs,
1269 Opt_quota_unset = 0,
1275 static const unsigned int opt_quota_values[] = {
1276 [Opt_quota_off] = GFS2_QUOTA_OFF,
1277 [Opt_quota_account] = GFS2_QUOTA_ACCOUNT,
1278 [Opt_quota_on] = GFS2_QUOTA_ON,
1282 Opt_data_writeback = GFS2_DATA_WRITEBACK,
1283 Opt_data_ordered = GFS2_DATA_ORDERED,
1287 Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
1288 Opt_errors_panic = GFS2_ERRORS_PANIC,
1291 static const struct fs_parameter_spec gfs2_param_specs[] = {
1292 fsparam_string ("lockproto", Opt_lockproto),
1293 fsparam_string ("locktable", Opt_locktable),
1294 fsparam_string ("hostdata", Opt_hostdata),
1295 fsparam_flag ("spectator", Opt_spectator),
1296 fsparam_flag ("norecovery", Opt_spectator),
1297 fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
1298 fsparam_flag ("localflocks", Opt_localflocks),
1299 fsparam_flag ("localcaching", Opt_localcaching),
1300 fsparam_flag_no("debug", Opt_debug),
1301 fsparam_flag ("upgrade", Opt_upgrade),
1302 fsparam_flag_no("acl", Opt_acl),
1303 fsparam_flag_no("suiddir", Opt_suiddir),
1304 fsparam_enum ("data", Opt_data),
1305 fsparam_flag ("meta", Opt_meta),
1306 fsparam_flag_no("discard", Opt_discard),
1307 fsparam_s32 ("commit", Opt_commit),
1308 fsparam_enum ("errors", Opt_errors),
1309 fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
1310 fsparam_s32 ("statfs_percent", Opt_statfs_percent),
1311 fsparam_s32 ("quota_quantum", Opt_quota_quantum),
1312 fsparam_flag_no("barrier", Opt_barrier),
1313 fsparam_flag_no("rgrplvb", Opt_rgrplvb),
1314 fsparam_flag_no("loccookie", Opt_loccookie),
1315 /* quota can be a flag or an enum so it gets special treatment */
1316 __fsparam(fs_param_is_enum, "quota", Opt_quota, fs_param_neg_with_no|fs_param_v_optional),
1320 static const struct fs_parameter_enum gfs2_param_enums[] = {
1321 { Opt_quota, "off", Opt_quota_off },
1322 { Opt_quota, "account", Opt_quota_account },
1323 { Opt_quota, "on", Opt_quota_on },
1324 { Opt_data, "writeback", Opt_data_writeback },
1325 { Opt_data, "ordered", Opt_data_ordered },
1326 { Opt_errors, "withdraw", Opt_errors_withdraw },
1327 { Opt_errors, "panic", Opt_errors_panic },
1331 const struct fs_parameter_description gfs2_fs_parameters = {
1333 .specs = gfs2_param_specs,
1334 .enums = gfs2_param_enums,
1337 /* Parse a single mount parameter */
1338 static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
1340 struct gfs2_args *args = fc->fs_private;
1341 struct fs_parse_result result;
1344 o = fs_parse(fc, &gfs2_fs_parameters, param, &result);
1350 strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
1353 strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
1356 strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
1359 args->ar_spectator = 1;
1361 case Opt_ignore_local_fs:
1362 /* Retained for backwards compat only */
1364 case Opt_localflocks:
1365 args->ar_localflocks = 1;
1367 case Opt_localcaching:
1368 /* Retained for backwards compat only */
1371 if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
1372 return invalf(fc, "gfs2: -o debug and -o errors=panic are mutually exclusive");
1373 args->ar_debug = result.boolean;
1376 /* Retained for backwards compat only */
1379 args->ar_posix_acl = result.boolean;
1382 /* The quota option can be a flag or an enum. A non-zero int_32
1383 result means that we have an enum index. Otherwise we have
1384 to rely on the 'negated' flag to tell us whether 'quota' or
1385 'noquota' was specified. */
1387 args->ar_quota = GFS2_QUOTA_OFF;
1388 else if (result.int_32 > 0)
1389 args->ar_quota = opt_quota_values[result.int_32];
1391 args->ar_quota = GFS2_QUOTA_ON;
1394 args->ar_suiddir = result.boolean;
1397 /* The uint_32 result maps directly to GFS2_DATA_* */
1398 args->ar_data = result.uint_32;
1404 args->ar_discard = result.boolean;
1407 if (result.int_32 <= 0)
1408 return invalf(fc, "gfs2: commit mount option requires a positive numeric argument");
1409 args->ar_commit = result.int_32;
1411 case Opt_statfs_quantum:
1412 if (result.int_32 < 0)
1413 return invalf(fc, "gfs2: statfs_quantum mount option requires a non-negative numeric argument");
1414 args->ar_statfs_quantum = result.int_32;
1416 case Opt_quota_quantum:
1417 if (result.int_32 <= 0)
1418 return invalf(fc, "gfs2: quota_quantum mount option requires a positive numeric argument");
1419 args->ar_quota_quantum = result.int_32;
1421 case Opt_statfs_percent:
1422 if (result.int_32 < 0 || result.int_32 > 100)
1423 return invalf(fc, "gfs2: statfs_percent mount option requires a numeric argument between 0 and 100");
1424 args->ar_statfs_percent = result.int_32;
1427 if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
1428 return invalf(fc, "gfs2: -o debug and -o errors=panic are mutually exclusive");
1429 args->ar_errors = result.uint_32;
1432 args->ar_nobarrier = result.boolean;
1435 args->ar_rgrplvb = result.boolean;
1438 args->ar_loccookie = result.boolean;
1441 return invalf(fc, "gfs2: invalid mount option: %s", param->key);
1446 static int gfs2_reconfigure(struct fs_context *fc)
1448 struct super_block *sb = fc->root->d_sb;
1449 struct gfs2_sbd *sdp = sb->s_fs_info;
1450 struct gfs2_args *oldargs = &sdp->sd_args;
1451 struct gfs2_args *newargs = fc->fs_private;
1452 struct gfs2_tune *gt = &sdp->sd_tune;
1455 sync_filesystem(sb);
1457 spin_lock(>->gt_spin);
1458 oldargs->ar_commit = gt->gt_logd_secs;
1459 oldargs->ar_quota_quantum = gt->gt_quota_quantum;
1460 if (gt->gt_statfs_slow)
1461 oldargs->ar_statfs_quantum = 0;
1463 oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
1464 spin_unlock(>->gt_spin);
1466 if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
1467 errorf(fc, "gfs2: reconfiguration of locking protocol not allowed");
1470 if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
1471 errorf(fc, "gfs2: reconfiguration of lock table not allowed");
1474 if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
1475 errorf(fc, "gfs2: reconfiguration of host data not allowed");
1478 if (newargs->ar_spectator != oldargs->ar_spectator) {
1479 errorf(fc, "gfs2: reconfiguration of spectator mode not allowed");
1482 if (newargs->ar_localflocks != oldargs->ar_localflocks) {
1483 errorf(fc, "gfs2: reconfiguration of localflocks not allowed");
1486 if (newargs->ar_meta != oldargs->ar_meta) {
1487 errorf(fc, "gfs2: switching between gfs2 and gfs2meta not allowed");
1490 if (oldargs->ar_spectator)
1491 fc->sb_flags |= SB_RDONLY;
1493 if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
1494 if (fc->sb_flags & SB_RDONLY) {
1495 error = gfs2_make_fs_ro(sdp);
1497 errorf(fc, "gfs2: unable to remount read-only");
1499 error = gfs2_make_fs_rw(sdp);
1501 errorf(fc, "gfs2: unable to remount read-write");
1504 sdp->sd_args = *newargs;
1506 if (sdp->sd_args.ar_posix_acl)
1507 sb->s_flags |= SB_POSIXACL;
1509 sb->s_flags &= ~SB_POSIXACL;
1510 if (sdp->sd_args.ar_nobarrier)
1511 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1513 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1514 spin_lock(>->gt_spin);
1515 gt->gt_logd_secs = newargs->ar_commit;
1516 gt->gt_quota_quantum = newargs->ar_quota_quantum;
1517 if (newargs->ar_statfs_quantum) {
1518 gt->gt_statfs_slow = 0;
1519 gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
1522 gt->gt_statfs_slow = 1;
1523 gt->gt_statfs_quantum = 30;
1525 spin_unlock(>->gt_spin);
1527 gfs2_online_uevent(sdp);
1531 static const struct fs_context_operations gfs2_context_ops = {
1532 .free = gfs2_fc_free,
1533 .parse_param = gfs2_parse_param,
1534 .get_tree = gfs2_get_tree,
1535 .reconfigure = gfs2_reconfigure,
1538 /* Set up the filesystem mount context */
1539 static int gfs2_init_fs_context(struct fs_context *fc)
1541 struct gfs2_args *args;
1543 args = kzalloc(sizeof(*args), GFP_KERNEL);
1547 args->ar_quota = GFS2_QUOTA_DEFAULT;
1548 args->ar_data = GFS2_DATA_DEFAULT;
1549 args->ar_commit = 30;
1550 args->ar_statfs_quantum = 30;
1551 args->ar_quota_quantum = 60;
1552 args->ar_errors = GFS2_ERRORS_DEFAULT;
1554 fc->fs_private = args;
1555 fc->ops = &gfs2_context_ops;
1559 static int set_meta_super(struct super_block *s, struct fs_context *fc)
1564 static int test_meta_super(struct super_block *s, struct fs_context *fc)
1566 return (fc->sget_key == s->s_bdev);
1569 static int gfs2_meta_get_tree(struct fs_context *fc)
1571 struct super_block *s;
1572 struct gfs2_sbd *sdp;
1576 if (!fc->source || !*fc->source)
1579 error = kern_path(fc->source, LOOKUP_FOLLOW, &path);
1581 pr_warn("path_lookup on %s returned error %d\n",
1585 fc->fs_type = &gfs2_fs_type;
1586 fc->sget_key = path.dentry->d_sb->s_bdev;
1587 s = sget_fc(fc, test_meta_super, set_meta_super);
1590 pr_warn("gfs2 mount does not exist\n");
1593 if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
1594 deactivate_locked_super(s);
1598 fc->root = dget(sdp->sd_master_dir);
1602 static const struct fs_context_operations gfs2_meta_context_ops = {
1603 .get_tree = gfs2_meta_get_tree,
1606 static int gfs2_meta_init_fs_context(struct fs_context *fc)
1608 int ret = gfs2_init_fs_context(fc);
1613 fc->ops = &gfs2_meta_context_ops;
1617 static void gfs2_kill_sb(struct super_block *sb)
1619 struct gfs2_sbd *sdp = sb->s_fs_info;
1622 kill_block_super(sb);
1626 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB);
1627 dput(sdp->sd_root_dir);
1628 dput(sdp->sd_master_dir);
1629 sdp->sd_root_dir = NULL;
1630 sdp->sd_master_dir = NULL;
1631 shrink_dcache_sb(sb);
1632 kill_block_super(sb);
1635 struct file_system_type gfs2_fs_type = {
1637 .fs_flags = FS_REQUIRES_DEV,
1638 .init_fs_context = gfs2_init_fs_context,
1639 .parameters = &gfs2_fs_parameters,
1640 .kill_sb = gfs2_kill_sb,
1641 .owner = THIS_MODULE,
1643 MODULE_ALIAS_FS("gfs2");
1645 struct file_system_type gfs2meta_fs_type = {
1647 .fs_flags = FS_REQUIRES_DEV,
1648 .init_fs_context = gfs2_meta_init_fs_context,
1649 .owner = THIS_MODULE,
1651 MODULE_ALIAS_FS("gfs2meta");