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 INIT_LIST_HEAD(&sdp->sd_sc_inodes_list);
115 mapping = &sdp->sd_aspace;
117 address_space_init_once(mapping);
118 mapping->a_ops = &gfs2_rgrp_aops;
119 mapping->host = sb->s_bdev->bd_inode;
121 mapping_set_gfp_mask(mapping, GFP_NOFS);
122 mapping->private_data = NULL;
123 mapping->writeback_index = 0;
125 spin_lock_init(&sdp->sd_log_lock);
126 atomic_set(&sdp->sd_log_pinned, 0);
127 INIT_LIST_HEAD(&sdp->sd_log_revokes);
128 INIT_LIST_HEAD(&sdp->sd_log_ordered);
129 spin_lock_init(&sdp->sd_ordered_lock);
131 init_waitqueue_head(&sdp->sd_log_waitq);
132 init_waitqueue_head(&sdp->sd_logd_waitq);
133 spin_lock_init(&sdp->sd_ail_lock);
134 INIT_LIST_HEAD(&sdp->sd_ail1_list);
135 INIT_LIST_HEAD(&sdp->sd_ail2_list);
137 init_rwsem(&sdp->sd_log_flush_lock);
138 atomic_set(&sdp->sd_log_in_flight, 0);
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 * @silent: Don't print a message if the check fails
155 * Checks the version code of the FS is one that we understand how to
156 * read and that the sizes of the various on-disk structures have not
160 static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent)
162 struct gfs2_sb_host *sb = &sdp->sd_sb;
164 if (sb->sb_magic != GFS2_MAGIC ||
165 sb->sb_type != GFS2_METATYPE_SB) {
167 pr_warn("not a GFS2 filesystem\n");
171 if (sb->sb_fs_format < GFS2_FS_FORMAT_MIN ||
172 sb->sb_fs_format > GFS2_FS_FORMAT_MAX ||
173 sb->sb_multihost_format != GFS2_FORMAT_MULTI) {
174 fs_warn(sdp, "Unknown on-disk format, unable to mount\n");
178 if (sb->sb_bsize < 512 || sb->sb_bsize > PAGE_SIZE ||
179 (sb->sb_bsize & (sb->sb_bsize - 1))) {
180 pr_warn("Invalid block size\n");
187 static void end_bio_io_page(struct bio *bio)
189 struct page *page = bio->bi_private;
192 SetPageUptodate(page);
194 pr_warn("error %d reading superblock\n", bio->bi_status);
198 static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf)
200 struct gfs2_sb_host *sb = &sdp->sd_sb;
201 struct super_block *s = sdp->sd_vfs;
202 const struct gfs2_sb *str = buf;
204 sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic);
205 sb->sb_type = be32_to_cpu(str->sb_header.mh_type);
206 sb->sb_fs_format = be32_to_cpu(str->sb_fs_format);
207 sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format);
208 sb->sb_bsize = be32_to_cpu(str->sb_bsize);
209 sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift);
210 sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr);
211 sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino);
212 sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr);
213 sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino);
215 memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN);
216 memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN);
217 memcpy(&s->s_uuid, str->sb_uuid, 16);
221 * gfs2_read_super - Read the gfs2 super block from disk
222 * @sdp: The GFS2 super block
223 * @sector: The location of the super block
224 * @silent: Don't print a message if the check fails
226 * This uses the bio functions to read the super block from disk
227 * because we want to be 100% sure that we never read cached data.
228 * A super block is read twice only during each GFS2 mount and is
229 * never written to by the filesystem. The first time its read no
230 * locks are held, and the only details which are looked at are those
231 * relating to the locking protocol. Once locking is up and working,
232 * the sb is read again under the lock to establish the location of
233 * the master directory (contains pointers to journals etc) and the
236 * Returns: 0 on success or error
239 static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent)
241 struct super_block *sb = sdp->sd_vfs;
246 page = alloc_page(GFP_NOFS);
250 ClearPageUptodate(page);
251 ClearPageDirty(page);
254 bio = bio_alloc(GFP_NOFS, 1);
255 bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9);
256 bio_set_dev(bio, sb->s_bdev);
257 bio_add_page(bio, page, PAGE_SIZE, 0);
259 bio->bi_end_io = end_bio_io_page;
260 bio->bi_private = page;
261 bio_set_op_attrs(bio, REQ_OP_READ, REQ_META);
263 wait_on_page_locked(page);
265 if (!PageUptodate(page)) {
273 return gfs2_check_sb(sdp, silent);
277 * gfs2_read_sb - Read super block
278 * @sdp: The GFS2 superblock
279 * @silent: Don't print message if mount fails
283 static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
285 u32 hash_blocks, ind_blocks, leaf_blocks;
290 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
293 fs_err(sdp, "can't read superblock\n");
297 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
298 GFS2_BASIC_BLOCK_SHIFT;
299 sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
300 sdp->sd_diptrs = (sdp->sd_sb.sb_bsize -
301 sizeof(struct gfs2_dinode)) / sizeof(u64);
302 sdp->sd_inptrs = (sdp->sd_sb.sb_bsize -
303 sizeof(struct gfs2_meta_header)) / sizeof(u64);
304 sdp->sd_ldptrs = (sdp->sd_sb.sb_bsize -
305 sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
306 sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header);
307 sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2;
308 sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1;
309 sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64);
310 sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize -
311 sizeof(struct gfs2_meta_header)) /
312 sizeof(struct gfs2_quota_change);
313 sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize -
314 sizeof(struct gfs2_meta_header))
315 * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */
318 * We always keep at least one block reserved for revokes in
319 * transactions. This greatly simplifies allocating additional
322 atomic_set(&sdp->sd_log_revokes_available, sdp->sd_ldptrs);
324 /* Compute maximum reservation required to add a entry to a directory */
326 hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH),
330 for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) {
331 tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs);
332 ind_blocks += tmp_blocks;
335 leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH;
337 sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks;
339 sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize -
340 sizeof(struct gfs2_dinode);
341 sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs;
346 space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs;
348 m = do_div(d, sdp->sd_inptrs);
350 if (d != sdp->sd_heightsize[x - 1] || m)
352 sdp->sd_heightsize[x] = space;
354 sdp->sd_max_height = x;
355 sdp->sd_heightsize[x] = ~0;
356 gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
358 sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
359 sizeof(struct gfs2_leaf)) /
360 GFS2_MIN_DIRENT_SIZE;
364 static int init_names(struct gfs2_sbd *sdp, int silent)
369 proto = sdp->sd_args.ar_lockproto;
370 table = sdp->sd_args.ar_locktable;
372 /* Try to autodetect */
374 if (!proto[0] || !table[0]) {
375 error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent);
380 proto = sdp->sd_sb.sb_lockproto;
382 table = sdp->sd_sb.sb_locktable;
386 table = sdp->sd_vfs->s_id;
388 strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN);
389 strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN);
391 table = sdp->sd_table_name;
392 while ((table = strchr(table, '/')))
398 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
406 error = gfs2_glock_nq_num(sdp,
407 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
408 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
411 fs_err(sdp, "can't acquire mount glock: %d\n", error);
415 error = gfs2_glock_nq_num(sdp,
416 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
418 LM_FLAG_NOEXP | GL_EXACT,
421 fs_err(sdp, "can't acquire live glock: %d\n", error);
425 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
426 CREATE, &sdp->sd_rename_gl);
428 fs_err(sdp, "can't create rename glock: %d\n", error);
432 error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops,
433 CREATE, &sdp->sd_freeze_gl);
435 fs_err(sdp, "can't create transaction glock: %d\n", error);
442 gfs2_glock_put(sdp->sd_freeze_gl);
444 gfs2_glock_put(sdp->sd_rename_gl);
446 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
448 gfs2_glock_dq_uninit(mount_gh);
453 static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
454 u64 no_addr, const char *name)
456 struct gfs2_sbd *sdp = sb->s_fs_info;
457 struct dentry *dentry;
460 inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0,
461 GFS2_BLKST_FREE /* ignore */);
463 fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
464 return PTR_ERR(inode);
466 dentry = d_make_root(inode);
468 fs_err(sdp, "can't alloc %s dentry\n", name);
475 static int init_sb(struct gfs2_sbd *sdp, int silent)
477 struct super_block *sb = sdp->sd_vfs;
478 struct gfs2_holder sb_gh;
482 ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
483 LM_ST_SHARED, 0, &sb_gh);
485 fs_err(sdp, "can't acquire superblock glock: %d\n", ret);
489 ret = gfs2_read_sb(sdp, silent);
491 fs_err(sdp, "can't read superblock: %d\n", ret);
495 switch(sdp->sd_sb.sb_fs_format) {
496 case GFS2_FS_FORMAT_MAX:
497 sb->s_xattr = gfs2_xattr_handlers_max;
500 case GFS2_FS_FORMAT_MIN:
501 sb->s_xattr = gfs2_xattr_handlers_min;
508 /* Set up the buffer cache and SB for real */
509 if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) {
511 fs_err(sdp, "FS block size (%u) is too small for device "
513 sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev));
516 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
518 fs_err(sdp, "FS block size (%u) is too big for machine "
520 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
523 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
525 /* Get the root inode */
526 no_addr = sdp->sd_sb.sb_root_dir.no_addr;
527 ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root");
531 /* Get the master inode */
532 no_addr = sdp->sd_sb.sb_master_dir.no_addr;
533 ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master");
535 dput(sdp->sd_root_dir);
538 sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir);
540 gfs2_glock_dq_uninit(&sb_gh);
544 static void gfs2_others_may_mount(struct gfs2_sbd *sdp)
546 char *message = "FIRSTMOUNT=Done";
547 char *envp[] = { message, NULL };
549 fs_info(sdp, "first mount done, others may mount\n");
551 if (sdp->sd_lockstruct.ls_ops->lm_first_done)
552 sdp->sd_lockstruct.ls_ops->lm_first_done(sdp);
554 kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp);
558 * gfs2_jindex_hold - Grab a lock on the jindex
559 * @sdp: The GFS2 superblock
560 * @ji_gh: the holder for the jindex glock
565 static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
567 struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex);
570 struct gfs2_jdesc *jd;
575 mutex_lock(&sdp->sd_jindex_mutex);
578 struct gfs2_inode *jip;
580 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh);
584 name.len = sprintf(buf, "journal%u", sdp->sd_journals);
585 name.hash = gfs2_disk_hash(name.name, name.len);
587 error = gfs2_dir_check(sdp->sd_jindex, &name, NULL);
588 if (error == -ENOENT) {
593 gfs2_glock_dq_uninit(ji_gh);
599 jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL);
603 INIT_LIST_HEAD(&jd->extent_list);
604 INIT_LIST_HEAD(&jd->jd_revoke_list);
606 INIT_WORK(&jd->jd_work, gfs2_recover_func);
607 jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
608 if (IS_ERR_OR_NULL(jd->jd_inode)) {
612 error = PTR_ERR(jd->jd_inode);
617 spin_lock(&sdp->sd_jindex_spin);
618 jd->jd_jid = sdp->sd_journals++;
619 jip = GFS2_I(jd->jd_inode);
620 jd->jd_no_addr = jip->i_no_addr;
621 list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
622 spin_unlock(&sdp->sd_jindex_spin);
625 mutex_unlock(&sdp->sd_jindex_mutex);
631 * init_statfs - look up and initialize master and local (per node) statfs inodes
632 * @sdp: The GFS2 superblock
634 * This should be called after the jindex is initialized in init_journal() and
635 * before gfs2_journal_recovery() is called because we need to be able to write
636 * to these inodes during recovery.
640 static int init_statfs(struct gfs2_sbd *sdp)
643 struct inode *master = d_inode(sdp->sd_master_dir);
644 struct inode *pn = NULL;
646 struct gfs2_jdesc *jd;
647 struct gfs2_inode *ip;
649 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
650 if (IS_ERR(sdp->sd_statfs_inode)) {
651 error = PTR_ERR(sdp->sd_statfs_inode);
652 fs_err(sdp, "can't read in statfs inode: %d\n", error);
655 if (sdp->sd_args.ar_spectator)
658 pn = gfs2_lookup_simple(master, "per_node");
661 fs_err(sdp, "can't find per_node directory: %d\n", error);
665 /* For each jid, lookup the corresponding local statfs inode in the
666 * per_node metafs directory and save it in the sdp->sd_sc_inodes_list. */
667 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
668 struct local_statfs_inode *lsi =
669 kmalloc(sizeof(struct local_statfs_inode), GFP_NOFS);
674 sprintf(buf, "statfs_change%u", jd->jd_jid);
675 lsi->si_sc_inode = gfs2_lookup_simple(pn, buf);
676 if (IS_ERR(lsi->si_sc_inode)) {
677 error = PTR_ERR(lsi->si_sc_inode);
678 fs_err(sdp, "can't find local \"sc\" file#%u: %d\n",
682 lsi->si_jid = jd->jd_jid;
683 if (jd->jd_jid == sdp->sd_jdesc->jd_jid)
684 sdp->sd_sc_inode = lsi->si_sc_inode;
686 list_add_tail(&lsi->si_list, &sdp->sd_sc_inodes_list);
691 ip = GFS2_I(sdp->sd_sc_inode);
692 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
695 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
701 free_local_statfs_inodes(sdp);
704 iput(sdp->sd_statfs_inode);
709 /* Uninitialize and free up memory used by the list of statfs inodes */
710 static void uninit_statfs(struct gfs2_sbd *sdp)
712 if (!sdp->sd_args.ar_spectator) {
713 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
714 free_local_statfs_inodes(sdp);
716 iput(sdp->sd_statfs_inode);
719 static int init_journal(struct gfs2_sbd *sdp, int undo)
721 struct inode *master = d_inode(sdp->sd_master_dir);
722 struct gfs2_holder ji_gh;
723 struct gfs2_inode *ip;
732 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
733 if (IS_ERR(sdp->sd_jindex)) {
734 fs_err(sdp, "can't lookup journal index: %d\n", error);
735 return PTR_ERR(sdp->sd_jindex);
738 /* Load in the journal index special file */
740 error = gfs2_jindex_hold(sdp, &ji_gh);
742 fs_err(sdp, "can't read journal index: %d\n", error);
747 if (!gfs2_jindex_size(sdp)) {
748 fs_err(sdp, "no journals!\n");
752 atomic_set(&sdp->sd_log_blks_needed, 0);
753 if (sdp->sd_args.ar_spectator) {
754 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
755 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
756 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
757 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
759 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
760 fs_err(sdp, "can't mount journal #%u\n",
761 sdp->sd_lockstruct.ls_jid);
762 fs_err(sdp, "there are only %u journals (0 - %u)\n",
763 gfs2_jindex_size(sdp),
764 gfs2_jindex_size(sdp) - 1);
767 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
769 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
772 LM_FLAG_NOEXP | GL_NOCACHE,
773 &sdp->sd_journal_gh);
775 fs_err(sdp, "can't acquire journal glock: %d\n", error);
779 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
780 sdp->sd_jinode_gl = ip->i_gl;
781 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
782 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
785 fs_err(sdp, "can't acquire journal inode glock: %d\n",
787 goto fail_journal_gh;
790 error = gfs2_jdesc_check(sdp->sd_jdesc);
792 fs_err(sdp, "my journal (%u) is bad: %d\n",
793 sdp->sd_jdesc->jd_jid, error);
796 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
797 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
798 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
800 /* Map the extents for this journal's blocks */
801 gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
803 trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
805 /* Lookup statfs inodes here so journal recovery can use them. */
806 error = init_statfs(sdp);
810 if (sdp->sd_lockstruct.ls_first) {
812 for (x = 0; x < sdp->sd_journals; x++) {
813 struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
815 if (sdp->sd_args.ar_spectator) {
816 error = check_journal_clean(sdp, jd, true);
821 error = gfs2_recover_journal(jd, true);
823 fs_err(sdp, "error recovering journal %u: %d\n",
829 gfs2_others_may_mount(sdp);
830 } else if (!sdp->sd_args.ar_spectator) {
831 error = gfs2_recover_journal(sdp->sd_jdesc, true);
833 fs_err(sdp, "error recovering my journal: %d\n", error);
838 sdp->sd_log_idle = 1;
839 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
840 gfs2_glock_dq_uninit(&ji_gh);
842 INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
848 /* A withdraw may have done dq/uninit so now we need to check it */
849 if (!sdp->sd_args.ar_spectator &&
850 gfs2_holder_initialized(&sdp->sd_jinode_gh))
851 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
853 if (!sdp->sd_args.ar_spectator &&
854 gfs2_holder_initialized(&sdp->sd_journal_gh))
855 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
857 gfs2_jindex_free(sdp);
859 gfs2_glock_dq_uninit(&ji_gh);
861 iput(sdp->sd_jindex);
865 static struct lock_class_key gfs2_quota_imutex_key;
867 static int init_inodes(struct gfs2_sbd *sdp, int undo)
870 struct inode *master = d_inode(sdp->sd_master_dir);
875 error = init_journal(sdp, undo);
876 complete_all(&sdp->sd_journal_ready);
880 /* Read in the resource index inode */
881 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
882 if (IS_ERR(sdp->sd_rindex)) {
883 error = PTR_ERR(sdp->sd_rindex);
884 fs_err(sdp, "can't get resource index inode: %d\n", error);
887 sdp->sd_rindex_uptodate = 0;
889 /* Read in the quota inode */
890 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
891 if (IS_ERR(sdp->sd_quota_inode)) {
892 error = PTR_ERR(sdp->sd_quota_inode);
893 fs_err(sdp, "can't get quota file inode: %d\n", error);
897 * i_rwsem on quota files is special. Since this inode is hidden system
898 * file, we are safe to define locking ourselves.
900 lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
901 &gfs2_quota_imutex_key);
903 error = gfs2_rindex_update(sdp);
910 iput(sdp->sd_quota_inode);
912 gfs2_clear_rgrpd(sdp);
913 iput(sdp->sd_rindex);
915 init_journal(sdp, UNDO);
920 static int init_per_node(struct gfs2_sbd *sdp, int undo)
922 struct inode *pn = NULL;
925 struct gfs2_inode *ip;
926 struct inode *master = d_inode(sdp->sd_master_dir);
928 if (sdp->sd_args.ar_spectator)
934 pn = gfs2_lookup_simple(master, "per_node");
937 fs_err(sdp, "can't find per_node directory: %d\n", error);
941 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
942 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
943 if (IS_ERR(sdp->sd_qc_inode)) {
944 error = PTR_ERR(sdp->sd_qc_inode);
945 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
952 ip = GFS2_I(sdp->sd_qc_inode);
953 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
956 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
963 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
965 iput(sdp->sd_qc_inode);
971 static const match_table_t nolock_tokens = {
972 { Opt_jid, "jid=%d", },
976 static const struct lm_lockops nolock_ops = {
977 .lm_proto_name = "lock_nolock",
978 .lm_put_lock = gfs2_glock_free,
979 .lm_tokens = &nolock_tokens,
983 * gfs2_lm_mount - mount a locking protocol
984 * @sdp: the filesystem
985 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
990 static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
992 const struct lm_lockops *lm;
993 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
994 struct gfs2_args *args = &sdp->sd_args;
995 const char *proto = sdp->sd_proto_name;
996 const char *table = sdp->sd_table_name;
1000 if (!strcmp("lock_nolock", proto)) {
1002 sdp->sd_args.ar_localflocks = 1;
1003 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
1004 } else if (!strcmp("lock_dlm", proto)) {
1008 pr_info("can't find protocol %s\n", proto);
1012 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
1017 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
1018 substring_t tmp[MAX_OPT_ARGS];
1024 token = match_token(o, *lm->lm_tokens, tmp);
1027 ret = match_int(&tmp[0], &option);
1028 if (ret || option < 0)
1029 goto hostdata_error;
1030 if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
1031 ls->ls_jid = option;
1035 /* Obsolete, but left for backward compat purposes */
1038 ret = match_int(&tmp[0], &option);
1039 if (ret || (option != 0 && option != 1))
1040 goto hostdata_error;
1041 ls->ls_first = option;
1046 fs_info(sdp, "unknown hostdata (%s)\n", o);
1051 if (lm->lm_mount == NULL) {
1052 fs_info(sdp, "Now mounting FS (format %u)...\n", sdp->sd_sb.sb_fs_format);
1053 complete_all(&sdp->sd_locking_init);
1056 ret = lm->lm_mount(sdp, table);
1058 fs_info(sdp, "Joined cluster. Now mounting FS (format %u)...\n",
1059 sdp->sd_sb.sb_fs_format);
1060 complete_all(&sdp->sd_locking_init);
1064 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1066 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
1067 if (likely(!gfs2_withdrawn(sdp)) && lm->lm_unmount)
1068 lm->lm_unmount(sdp);
1071 static int wait_on_journal(struct gfs2_sbd *sdp)
1073 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
1076 return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
1080 void gfs2_online_uevent(struct gfs2_sbd *sdp)
1082 struct super_block *sb = sdp->sd_vfs;
1085 char *envp[] = { ro, spectator, NULL };
1086 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
1087 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
1088 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
1092 * gfs2_fill_super - Read in superblock
1093 * @sb: The VFS superblock
1094 * @fc: Mount options and flags
1098 static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
1100 struct gfs2_args *args = fc->fs_private;
1101 int silent = fc->sb_flags & SB_SILENT;
1102 struct gfs2_sbd *sdp;
1103 struct gfs2_holder mount_gh;
1104 struct gfs2_holder freeze_gh;
1109 pr_warn("can't alloc struct gfs2_sbd\n");
1112 sdp->sd_args = *args;
1114 if (sdp->sd_args.ar_spectator) {
1115 sb->s_flags |= SB_RDONLY;
1116 set_bit(SDF_RORECOVERY, &sdp->sd_flags);
1118 if (sdp->sd_args.ar_posix_acl)
1119 sb->s_flags |= SB_POSIXACL;
1120 if (sdp->sd_args.ar_nobarrier)
1121 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1123 sb->s_flags |= SB_NOSEC;
1124 sb->s_magic = GFS2_MAGIC;
1125 sb->s_op = &gfs2_super_ops;
1126 sb->s_d_op = &gfs2_dops;
1127 sb->s_export_op = &gfs2_export_ops;
1128 sb->s_qcop = &gfs2_quotactl_ops;
1129 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1130 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1131 sb->s_time_gran = 1;
1132 sb->s_maxbytes = MAX_LFS_FILESIZE;
1134 /* Set up the buffer cache and fill in some fake block size values
1135 to allow us to read-in the on-disk superblock. */
1136 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1137 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1138 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1139 GFS2_BASIC_BLOCK_SHIFT;
1140 sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
1142 sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
1143 sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
1144 if (sdp->sd_args.ar_statfs_quantum) {
1145 sdp->sd_tune.gt_statfs_slow = 0;
1146 sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
1148 sdp->sd_tune.gt_statfs_slow = 1;
1149 sdp->sd_tune.gt_statfs_quantum = 30;
1152 error = init_names(sdp, silent);
1156 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
1158 error = gfs2_sys_fs_add(sdp);
1162 gfs2_create_debugfs_file(sdp);
1164 error = gfs2_lm_mount(sdp, silent);
1168 error = init_locking(sdp, &mount_gh, DO);
1172 error = init_sb(sdp, silent);
1176 /* Turn rgrplvb on by default if fs format is recent enough */
1177 if (!sdp->sd_args.ar_got_rgrplvb && sdp->sd_sb.sb_fs_format > 1801)
1178 sdp->sd_args.ar_rgrplvb = 1;
1180 error = wait_on_journal(sdp);
1185 * If user space has failed to join the cluster or some similar
1186 * failure has occurred, then the journal id will contain a
1187 * negative (error) number. This will then be returned to the
1188 * caller (of the mount syscall). We do this even for spectator
1189 * mounts (which just write a jid of 0 to indicate "ok" even though
1190 * the jid is unused in the spectator case)
1192 if (sdp->sd_lockstruct.ls_jid < 0) {
1193 error = sdp->sd_lockstruct.ls_jid;
1194 sdp->sd_lockstruct.ls_jid = 0;
1198 if (sdp->sd_args.ar_spectator)
1199 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s",
1200 sdp->sd_table_name);
1202 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u",
1203 sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
1205 error = init_inodes(sdp, DO);
1209 error = init_per_node(sdp, DO);
1213 error = gfs2_statfs_init(sdp);
1215 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1219 error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
1224 error = gfs2_make_fs_rw(sdp);
1226 gfs2_freeze_unlock(&freeze_gh);
1228 fs_err(sdp, "can't make FS RW: %d\n", error);
1231 gfs2_glock_dq_uninit(&mount_gh);
1232 gfs2_online_uevent(sdp);
1236 init_per_node(sdp, UNDO);
1238 init_inodes(sdp, UNDO);
1240 if (sdp->sd_root_dir)
1241 dput(sdp->sd_root_dir);
1242 if (sdp->sd_master_dir)
1243 dput(sdp->sd_master_dir);
1248 init_locking(sdp, &mount_gh, UNDO);
1250 complete_all(&sdp->sd_journal_ready);
1251 gfs2_gl_hash_clear(sdp);
1252 gfs2_lm_unmount(sdp);
1254 gfs2_delete_debugfs_file(sdp);
1255 gfs2_sys_fs_del(sdp);
1258 sb->s_fs_info = NULL;
1263 * gfs2_get_tree - Get the GFS2 superblock and root directory
1264 * @fc: The filesystem context
1266 * Returns: 0 or -errno on error
1268 static int gfs2_get_tree(struct fs_context *fc)
1270 struct gfs2_args *args = fc->fs_private;
1271 struct gfs2_sbd *sdp;
1274 error = get_tree_bdev(fc, gfs2_fill_super);
1278 sdp = fc->root->d_sb->s_fs_info;
1281 fc->root = dget(sdp->sd_master_dir);
1283 fc->root = dget(sdp->sd_root_dir);
1287 static void gfs2_fc_free(struct fs_context *fc)
1289 struct gfs2_args *args = fc->fs_private;
1299 Opt_ignore_local_fs,
1321 static const struct constant_table gfs2_param_quota[] = {
1322 {"off", GFS2_QUOTA_OFF},
1323 {"account", GFS2_QUOTA_ACCOUNT},
1324 {"on", GFS2_QUOTA_ON},
1329 Opt_data_writeback = GFS2_DATA_WRITEBACK,
1330 Opt_data_ordered = GFS2_DATA_ORDERED,
1333 static const struct constant_table gfs2_param_data[] = {
1334 {"writeback", Opt_data_writeback },
1335 {"ordered", Opt_data_ordered },
1340 Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
1341 Opt_errors_panic = GFS2_ERRORS_PANIC,
1344 static const struct constant_table gfs2_param_errors[] = {
1345 {"withdraw", Opt_errors_withdraw },
1346 {"panic", Opt_errors_panic },
1350 static const struct fs_parameter_spec gfs2_fs_parameters[] = {
1351 fsparam_string ("lockproto", Opt_lockproto),
1352 fsparam_string ("locktable", Opt_locktable),
1353 fsparam_string ("hostdata", Opt_hostdata),
1354 fsparam_flag ("spectator", Opt_spectator),
1355 fsparam_flag ("norecovery", Opt_spectator),
1356 fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
1357 fsparam_flag ("localflocks", Opt_localflocks),
1358 fsparam_flag ("localcaching", Opt_localcaching),
1359 fsparam_flag_no("debug", Opt_debug),
1360 fsparam_flag ("upgrade", Opt_upgrade),
1361 fsparam_flag_no("acl", Opt_acl),
1362 fsparam_flag_no("suiddir", Opt_suiddir),
1363 fsparam_enum ("data", Opt_data, gfs2_param_data),
1364 fsparam_flag ("meta", Opt_meta),
1365 fsparam_flag_no("discard", Opt_discard),
1366 fsparam_s32 ("commit", Opt_commit),
1367 fsparam_enum ("errors", Opt_errors, gfs2_param_errors),
1368 fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
1369 fsparam_s32 ("statfs_percent", Opt_statfs_percent),
1370 fsparam_s32 ("quota_quantum", Opt_quota_quantum),
1371 fsparam_flag_no("barrier", Opt_barrier),
1372 fsparam_flag_no("rgrplvb", Opt_rgrplvb),
1373 fsparam_flag_no("loccookie", Opt_loccookie),
1374 /* quota can be a flag or an enum so it gets special treatment */
1375 fsparam_flag_no("quota", Opt_quota_flag),
1376 fsparam_enum("quota", Opt_quota, gfs2_param_quota),
1380 /* Parse a single mount parameter */
1381 static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
1383 struct gfs2_args *args = fc->fs_private;
1384 struct fs_parse_result result;
1387 o = fs_parse(fc, gfs2_fs_parameters, param, &result);
1393 strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
1396 strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
1399 strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
1402 args->ar_spectator = 1;
1404 case Opt_ignore_local_fs:
1405 /* Retained for backwards compat only */
1407 case Opt_localflocks:
1408 args->ar_localflocks = 1;
1410 case Opt_localcaching:
1411 /* Retained for backwards compat only */
1414 if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
1415 return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
1416 args->ar_debug = result.boolean;
1419 /* Retained for backwards compat only */
1422 args->ar_posix_acl = result.boolean;
1424 case Opt_quota_flag:
1425 args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON;
1428 args->ar_quota = result.int_32;
1431 args->ar_suiddir = result.boolean;
1434 /* The uint_32 result maps directly to GFS2_DATA_* */
1435 args->ar_data = result.uint_32;
1441 args->ar_discard = result.boolean;
1444 if (result.int_32 <= 0)
1445 return invalfc(fc, "commit mount option requires a positive numeric argument");
1446 args->ar_commit = result.int_32;
1448 case Opt_statfs_quantum:
1449 if (result.int_32 < 0)
1450 return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument");
1451 args->ar_statfs_quantum = result.int_32;
1453 case Opt_quota_quantum:
1454 if (result.int_32 <= 0)
1455 return invalfc(fc, "quota_quantum mount option requires a positive numeric argument");
1456 args->ar_quota_quantum = result.int_32;
1458 case Opt_statfs_percent:
1459 if (result.int_32 < 0 || result.int_32 > 100)
1460 return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100");
1461 args->ar_statfs_percent = result.int_32;
1464 if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
1465 return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
1466 args->ar_errors = result.uint_32;
1469 args->ar_nobarrier = result.boolean;
1472 args->ar_rgrplvb = result.boolean;
1473 args->ar_got_rgrplvb = 1;
1476 args->ar_loccookie = result.boolean;
1479 return invalfc(fc, "invalid mount option: %s", param->key);
1484 static int gfs2_reconfigure(struct fs_context *fc)
1486 struct super_block *sb = fc->root->d_sb;
1487 struct gfs2_sbd *sdp = sb->s_fs_info;
1488 struct gfs2_args *oldargs = &sdp->sd_args;
1489 struct gfs2_args *newargs = fc->fs_private;
1490 struct gfs2_tune *gt = &sdp->sd_tune;
1493 sync_filesystem(sb);
1495 spin_lock(>->gt_spin);
1496 oldargs->ar_commit = gt->gt_logd_secs;
1497 oldargs->ar_quota_quantum = gt->gt_quota_quantum;
1498 if (gt->gt_statfs_slow)
1499 oldargs->ar_statfs_quantum = 0;
1501 oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
1502 spin_unlock(>->gt_spin);
1504 if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
1505 errorfc(fc, "reconfiguration of locking protocol not allowed");
1508 if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
1509 errorfc(fc, "reconfiguration of lock table not allowed");
1512 if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
1513 errorfc(fc, "reconfiguration of host data not allowed");
1516 if (newargs->ar_spectator != oldargs->ar_spectator) {
1517 errorfc(fc, "reconfiguration of spectator mode not allowed");
1520 if (newargs->ar_localflocks != oldargs->ar_localflocks) {
1521 errorfc(fc, "reconfiguration of localflocks not allowed");
1524 if (newargs->ar_meta != oldargs->ar_meta) {
1525 errorfc(fc, "switching between gfs2 and gfs2meta not allowed");
1528 if (oldargs->ar_spectator)
1529 fc->sb_flags |= SB_RDONLY;
1531 if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
1532 struct gfs2_holder freeze_gh;
1534 error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
1538 if (fc->sb_flags & SB_RDONLY) {
1539 gfs2_make_fs_ro(sdp);
1541 error = gfs2_make_fs_rw(sdp);
1543 errorfc(fc, "unable to remount read-write");
1545 gfs2_freeze_unlock(&freeze_gh);
1547 sdp->sd_args = *newargs;
1549 if (sdp->sd_args.ar_posix_acl)
1550 sb->s_flags |= SB_POSIXACL;
1552 sb->s_flags &= ~SB_POSIXACL;
1553 if (sdp->sd_args.ar_nobarrier)
1554 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1556 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1557 spin_lock(>->gt_spin);
1558 gt->gt_logd_secs = newargs->ar_commit;
1559 gt->gt_quota_quantum = newargs->ar_quota_quantum;
1560 if (newargs->ar_statfs_quantum) {
1561 gt->gt_statfs_slow = 0;
1562 gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
1565 gt->gt_statfs_slow = 1;
1566 gt->gt_statfs_quantum = 30;
1568 spin_unlock(>->gt_spin);
1570 gfs2_online_uevent(sdp);
1574 static const struct fs_context_operations gfs2_context_ops = {
1575 .free = gfs2_fc_free,
1576 .parse_param = gfs2_parse_param,
1577 .get_tree = gfs2_get_tree,
1578 .reconfigure = gfs2_reconfigure,
1581 /* Set up the filesystem mount context */
1582 static int gfs2_init_fs_context(struct fs_context *fc)
1584 struct gfs2_args *args;
1586 args = kmalloc(sizeof(*args), GFP_KERNEL);
1590 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
1591 struct gfs2_sbd *sdp = fc->root->d_sb->s_fs_info;
1593 *args = sdp->sd_args;
1595 memset(args, 0, sizeof(*args));
1596 args->ar_quota = GFS2_QUOTA_DEFAULT;
1597 args->ar_data = GFS2_DATA_DEFAULT;
1598 args->ar_commit = 30;
1599 args->ar_statfs_quantum = 30;
1600 args->ar_quota_quantum = 60;
1601 args->ar_errors = GFS2_ERRORS_DEFAULT;
1603 fc->fs_private = args;
1604 fc->ops = &gfs2_context_ops;
1608 static int set_meta_super(struct super_block *s, struct fs_context *fc)
1613 static int test_meta_super(struct super_block *s, struct fs_context *fc)
1615 return (fc->sget_key == s->s_bdev);
1618 static int gfs2_meta_get_tree(struct fs_context *fc)
1620 struct super_block *s;
1621 struct gfs2_sbd *sdp;
1625 if (!fc->source || !*fc->source)
1628 error = kern_path(fc->source, LOOKUP_FOLLOW, &path);
1630 pr_warn("path_lookup on %s returned error %d\n",
1634 fc->fs_type = &gfs2_fs_type;
1635 fc->sget_key = path.dentry->d_sb->s_bdev;
1636 s = sget_fc(fc, test_meta_super, set_meta_super);
1639 pr_warn("gfs2 mount does not exist\n");
1642 if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
1643 deactivate_locked_super(s);
1647 fc->root = dget(sdp->sd_master_dir);
1651 static const struct fs_context_operations gfs2_meta_context_ops = {
1652 .free = gfs2_fc_free,
1653 .get_tree = gfs2_meta_get_tree,
1656 static int gfs2_meta_init_fs_context(struct fs_context *fc)
1658 int ret = gfs2_init_fs_context(fc);
1663 fc->ops = &gfs2_meta_context_ops;
1667 static void gfs2_kill_sb(struct super_block *sb)
1669 struct gfs2_sbd *sdp = sb->s_fs_info;
1672 kill_block_super(sb);
1676 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB);
1677 dput(sdp->sd_root_dir);
1678 dput(sdp->sd_master_dir);
1679 sdp->sd_root_dir = NULL;
1680 sdp->sd_master_dir = NULL;
1681 shrink_dcache_sb(sb);
1682 kill_block_super(sb);
1685 struct file_system_type gfs2_fs_type = {
1687 .fs_flags = FS_REQUIRES_DEV,
1688 .init_fs_context = gfs2_init_fs_context,
1689 .parameters = gfs2_fs_parameters,
1690 .kill_sb = gfs2_kill_sb,
1691 .owner = THIS_MODULE,
1693 MODULE_ALIAS_FS("gfs2");
1695 struct file_system_type gfs2meta_fs_type = {
1697 .fs_flags = FS_REQUIRES_DEV,
1698 .init_fs_context = gfs2_meta_init_fs_context,
1699 .owner = THIS_MODULE,
1701 MODULE_ALIAS_FS("gfs2meta");