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 d_mark_dontcache(jd->jd_inode);
618 spin_lock(&sdp->sd_jindex_spin);
619 jd->jd_jid = sdp->sd_journals++;
620 jip = GFS2_I(jd->jd_inode);
621 jd->jd_no_addr = jip->i_no_addr;
622 list_add_tail(&jd->jd_list, &sdp->sd_jindex_list);
623 spin_unlock(&sdp->sd_jindex_spin);
626 mutex_unlock(&sdp->sd_jindex_mutex);
632 * init_statfs - look up and initialize master and local (per node) statfs inodes
633 * @sdp: The GFS2 superblock
635 * This should be called after the jindex is initialized in init_journal() and
636 * before gfs2_journal_recovery() is called because we need to be able to write
637 * to these inodes during recovery.
641 static int init_statfs(struct gfs2_sbd *sdp)
644 struct inode *master = d_inode(sdp->sd_master_dir);
645 struct inode *pn = NULL;
647 struct gfs2_jdesc *jd;
648 struct gfs2_inode *ip;
650 sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs");
651 if (IS_ERR(sdp->sd_statfs_inode)) {
652 error = PTR_ERR(sdp->sd_statfs_inode);
653 fs_err(sdp, "can't read in statfs inode: %d\n", error);
656 if (sdp->sd_args.ar_spectator)
659 pn = gfs2_lookup_simple(master, "per_node");
662 fs_err(sdp, "can't find per_node directory: %d\n", error);
666 /* For each jid, lookup the corresponding local statfs inode in the
667 * per_node metafs directory and save it in the sdp->sd_sc_inodes_list. */
668 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
669 struct local_statfs_inode *lsi =
670 kmalloc(sizeof(struct local_statfs_inode), GFP_NOFS);
675 sprintf(buf, "statfs_change%u", jd->jd_jid);
676 lsi->si_sc_inode = gfs2_lookup_simple(pn, buf);
677 if (IS_ERR(lsi->si_sc_inode)) {
678 error = PTR_ERR(lsi->si_sc_inode);
679 fs_err(sdp, "can't find local \"sc\" file#%u: %d\n",
684 lsi->si_jid = jd->jd_jid;
685 if (jd->jd_jid == sdp->sd_jdesc->jd_jid)
686 sdp->sd_sc_inode = lsi->si_sc_inode;
688 list_add_tail(&lsi->si_list, &sdp->sd_sc_inodes_list);
693 ip = GFS2_I(sdp->sd_sc_inode);
694 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
697 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
700 /* read in the local statfs buffer - other nodes don't change it. */
701 error = gfs2_meta_inode_buffer(ip, &sdp->sd_sc_bh);
703 fs_err(sdp, "Cannot read in local statfs: %d\n", error);
709 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
711 free_local_statfs_inodes(sdp);
714 iput(sdp->sd_statfs_inode);
719 /* Uninitialize and free up memory used by the list of statfs inodes */
720 static void uninit_statfs(struct gfs2_sbd *sdp)
722 if (!sdp->sd_args.ar_spectator) {
723 brelse(sdp->sd_sc_bh);
724 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
725 free_local_statfs_inodes(sdp);
727 iput(sdp->sd_statfs_inode);
730 static int init_journal(struct gfs2_sbd *sdp, int undo)
732 struct inode *master = d_inode(sdp->sd_master_dir);
733 struct gfs2_holder ji_gh;
734 struct gfs2_inode *ip;
743 sdp->sd_jindex = gfs2_lookup_simple(master, "jindex");
744 if (IS_ERR(sdp->sd_jindex)) {
745 fs_err(sdp, "can't lookup journal index: %d\n", error);
746 return PTR_ERR(sdp->sd_jindex);
749 /* Load in the journal index special file */
751 error = gfs2_jindex_hold(sdp, &ji_gh);
753 fs_err(sdp, "can't read journal index: %d\n", error);
758 if (!gfs2_jindex_size(sdp)) {
759 fs_err(sdp, "no journals!\n");
763 atomic_set(&sdp->sd_log_blks_needed, 0);
764 if (sdp->sd_args.ar_spectator) {
765 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
766 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
767 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
768 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
770 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
771 fs_err(sdp, "can't mount journal #%u\n",
772 sdp->sd_lockstruct.ls_jid);
773 fs_err(sdp, "there are only %u journals (0 - %u)\n",
774 gfs2_jindex_size(sdp),
775 gfs2_jindex_size(sdp) - 1);
778 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
780 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
783 LM_FLAG_NOEXP | GL_NOCACHE,
784 &sdp->sd_journal_gh);
786 fs_err(sdp, "can't acquire journal glock: %d\n", error);
790 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
791 sdp->sd_jinode_gl = ip->i_gl;
792 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
793 LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE,
796 fs_err(sdp, "can't acquire journal inode glock: %d\n",
798 goto fail_journal_gh;
801 error = gfs2_jdesc_check(sdp->sd_jdesc);
803 fs_err(sdp, "my journal (%u) is bad: %d\n",
804 sdp->sd_jdesc->jd_jid, error);
807 atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks);
808 atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5);
809 atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5);
811 /* Map the extents for this journal's blocks */
812 gfs2_map_journal_extents(sdp, sdp->sd_jdesc);
814 trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free));
816 /* Lookup statfs inodes here so journal recovery can use them. */
817 error = init_statfs(sdp);
821 if (sdp->sd_lockstruct.ls_first) {
823 for (x = 0; x < sdp->sd_journals; x++) {
824 struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x);
826 if (sdp->sd_args.ar_spectator) {
827 error = check_journal_clean(sdp, jd, true);
832 error = gfs2_recover_journal(jd, true);
834 fs_err(sdp, "error recovering journal %u: %d\n",
840 gfs2_others_may_mount(sdp);
841 } else if (!sdp->sd_args.ar_spectator) {
842 error = gfs2_recover_journal(sdp->sd_jdesc, true);
844 fs_err(sdp, "error recovering my journal: %d\n", error);
849 sdp->sd_log_idle = 1;
850 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
851 gfs2_glock_dq_uninit(&ji_gh);
853 INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func);
859 /* A withdraw may have done dq/uninit so now we need to check it */
860 if (!sdp->sd_args.ar_spectator &&
861 gfs2_holder_initialized(&sdp->sd_jinode_gh))
862 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
864 if (!sdp->sd_args.ar_spectator &&
865 gfs2_holder_initialized(&sdp->sd_journal_gh))
866 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
868 gfs2_jindex_free(sdp);
870 gfs2_glock_dq_uninit(&ji_gh);
872 iput(sdp->sd_jindex);
876 static struct lock_class_key gfs2_quota_imutex_key;
878 static int init_inodes(struct gfs2_sbd *sdp, int undo)
881 struct inode *master = d_inode(sdp->sd_master_dir);
886 error = init_journal(sdp, undo);
887 complete_all(&sdp->sd_journal_ready);
891 /* Read in the resource index inode */
892 sdp->sd_rindex = gfs2_lookup_simple(master, "rindex");
893 if (IS_ERR(sdp->sd_rindex)) {
894 error = PTR_ERR(sdp->sd_rindex);
895 fs_err(sdp, "can't get resource index inode: %d\n", error);
898 sdp->sd_rindex_uptodate = 0;
900 /* Read in the quota inode */
901 sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota");
902 if (IS_ERR(sdp->sd_quota_inode)) {
903 error = PTR_ERR(sdp->sd_quota_inode);
904 fs_err(sdp, "can't get quota file inode: %d\n", error);
908 * i_rwsem on quota files is special. Since this inode is hidden system
909 * file, we are safe to define locking ourselves.
911 lockdep_set_class(&sdp->sd_quota_inode->i_rwsem,
912 &gfs2_quota_imutex_key);
914 error = gfs2_rindex_update(sdp);
921 iput(sdp->sd_quota_inode);
923 gfs2_clear_rgrpd(sdp);
924 iput(sdp->sd_rindex);
926 init_journal(sdp, UNDO);
931 static int init_per_node(struct gfs2_sbd *sdp, int undo)
933 struct inode *pn = NULL;
936 struct gfs2_inode *ip;
937 struct inode *master = d_inode(sdp->sd_master_dir);
939 if (sdp->sd_args.ar_spectator)
945 pn = gfs2_lookup_simple(master, "per_node");
948 fs_err(sdp, "can't find per_node directory: %d\n", error);
952 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
953 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
954 if (IS_ERR(sdp->sd_qc_inode)) {
955 error = PTR_ERR(sdp->sd_qc_inode);
956 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
963 ip = GFS2_I(sdp->sd_qc_inode);
964 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
967 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
974 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
976 iput(sdp->sd_qc_inode);
982 static const match_table_t nolock_tokens = {
983 { Opt_jid, "jid=%d", },
987 static const struct lm_lockops nolock_ops = {
988 .lm_proto_name = "lock_nolock",
989 .lm_put_lock = gfs2_glock_free,
990 .lm_tokens = &nolock_tokens,
994 * gfs2_lm_mount - mount a locking protocol
995 * @sdp: the filesystem
996 * @silent: if 1, don't complain if the FS isn't a GFS2 fs
1001 static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
1003 const struct lm_lockops *lm;
1004 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
1005 struct gfs2_args *args = &sdp->sd_args;
1006 const char *proto = sdp->sd_proto_name;
1007 const char *table = sdp->sd_table_name;
1011 if (!strcmp("lock_nolock", proto)) {
1013 sdp->sd_args.ar_localflocks = 1;
1014 #ifdef CONFIG_GFS2_FS_LOCKING_DLM
1015 } else if (!strcmp("lock_dlm", proto)) {
1019 pr_info("can't find protocol %s\n", proto);
1023 fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
1028 for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) {
1029 substring_t tmp[MAX_OPT_ARGS];
1035 token = match_token(o, *lm->lm_tokens, tmp);
1038 ret = match_int(&tmp[0], &option);
1039 if (ret || option < 0)
1040 goto hostdata_error;
1041 if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags))
1042 ls->ls_jid = option;
1046 /* Obsolete, but left for backward compat purposes */
1049 ret = match_int(&tmp[0], &option);
1050 if (ret || (option != 0 && option != 1))
1051 goto hostdata_error;
1052 ls->ls_first = option;
1057 fs_info(sdp, "unknown hostdata (%s)\n", o);
1062 if (lm->lm_mount == NULL) {
1063 fs_info(sdp, "Now mounting FS (format %u)...\n", sdp->sd_sb.sb_fs_format);
1064 complete_all(&sdp->sd_locking_init);
1067 ret = lm->lm_mount(sdp, table);
1069 fs_info(sdp, "Joined cluster. Now mounting FS (format %u)...\n",
1070 sdp->sd_sb.sb_fs_format);
1071 complete_all(&sdp->sd_locking_init);
1075 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
1077 const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
1078 if (likely(!gfs2_withdrawn(sdp)) && lm->lm_unmount)
1079 lm->lm_unmount(sdp);
1082 static int wait_on_journal(struct gfs2_sbd *sdp)
1084 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
1087 return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE)
1091 void gfs2_online_uevent(struct gfs2_sbd *sdp)
1093 struct super_block *sb = sdp->sd_vfs;
1096 char *envp[] = { ro, spectator, NULL };
1097 sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
1098 sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
1099 kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp);
1102 static int init_threads(struct gfs2_sbd *sdp)
1104 struct task_struct *p;
1107 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
1110 fs_err(sdp, "can't start logd thread: %d\n", error);
1113 sdp->sd_logd_process = p;
1115 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
1118 fs_err(sdp, "can't start quotad thread: %d\n", error);
1121 sdp->sd_quotad_process = p;
1125 kthread_stop(sdp->sd_logd_process);
1126 sdp->sd_logd_process = NULL;
1131 * gfs2_fill_super - Read in superblock
1132 * @sb: The VFS superblock
1133 * @fc: Mount options and flags
1137 static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc)
1139 struct gfs2_args *args = fc->fs_private;
1140 int silent = fc->sb_flags & SB_SILENT;
1141 struct gfs2_sbd *sdp;
1142 struct gfs2_holder mount_gh;
1143 struct gfs2_holder freeze_gh;
1148 pr_warn("can't alloc struct gfs2_sbd\n");
1151 sdp->sd_args = *args;
1153 if (sdp->sd_args.ar_spectator) {
1154 sb->s_flags |= SB_RDONLY;
1155 set_bit(SDF_RORECOVERY, &sdp->sd_flags);
1157 if (sdp->sd_args.ar_posix_acl)
1158 sb->s_flags |= SB_POSIXACL;
1159 if (sdp->sd_args.ar_nobarrier)
1160 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1162 sb->s_flags |= SB_NOSEC;
1163 sb->s_magic = GFS2_MAGIC;
1164 sb->s_op = &gfs2_super_ops;
1165 sb->s_d_op = &gfs2_dops;
1166 sb->s_export_op = &gfs2_export_ops;
1167 sb->s_qcop = &gfs2_quotactl_ops;
1168 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
1169 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1170 sb->s_time_gran = 1;
1171 sb->s_maxbytes = MAX_LFS_FILESIZE;
1173 /* Set up the buffer cache and fill in some fake block size values
1174 to allow us to read-in the on-disk superblock. */
1175 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
1176 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
1177 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
1178 GFS2_BASIC_BLOCK_SHIFT;
1179 sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift);
1181 sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit;
1182 sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
1183 if (sdp->sd_args.ar_statfs_quantum) {
1184 sdp->sd_tune.gt_statfs_slow = 0;
1185 sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
1187 sdp->sd_tune.gt_statfs_slow = 1;
1188 sdp->sd_tune.gt_statfs_quantum = 30;
1191 error = init_names(sdp, silent);
1195 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name);
1197 error = gfs2_sys_fs_add(sdp);
1201 gfs2_create_debugfs_file(sdp);
1203 error = gfs2_lm_mount(sdp, silent);
1207 error = init_locking(sdp, &mount_gh, DO);
1211 error = init_sb(sdp, silent);
1215 /* Turn rgrplvb on by default if fs format is recent enough */
1216 if (!sdp->sd_args.ar_got_rgrplvb && sdp->sd_sb.sb_fs_format > 1801)
1217 sdp->sd_args.ar_rgrplvb = 1;
1219 error = wait_on_journal(sdp);
1224 * If user space has failed to join the cluster or some similar
1225 * failure has occurred, then the journal id will contain a
1226 * negative (error) number. This will then be returned to the
1227 * caller (of the mount syscall). We do this even for spectator
1228 * mounts (which just write a jid of 0 to indicate "ok" even though
1229 * the jid is unused in the spectator case)
1231 if (sdp->sd_lockstruct.ls_jid < 0) {
1232 error = sdp->sd_lockstruct.ls_jid;
1233 sdp->sd_lockstruct.ls_jid = 0;
1237 if (sdp->sd_args.ar_spectator)
1238 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s",
1239 sdp->sd_table_name);
1241 snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u",
1242 sdp->sd_table_name, sdp->sd_lockstruct.ls_jid);
1244 error = init_inodes(sdp, DO);
1248 error = init_per_node(sdp, DO);
1252 error = gfs2_statfs_init(sdp);
1254 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
1258 if (!sb_rdonly(sb)) {
1259 error = init_threads(sdp);
1261 gfs2_withdraw_delayed(sdp);
1266 error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
1271 error = gfs2_make_fs_rw(sdp);
1273 gfs2_freeze_unlock(&freeze_gh);
1275 if (sdp->sd_quotad_process)
1276 kthread_stop(sdp->sd_quotad_process);
1277 sdp->sd_quotad_process = NULL;
1278 if (sdp->sd_logd_process)
1279 kthread_stop(sdp->sd_logd_process);
1280 sdp->sd_logd_process = NULL;
1281 fs_err(sdp, "can't make FS RW: %d\n", error);
1284 gfs2_glock_dq_uninit(&mount_gh);
1285 gfs2_online_uevent(sdp);
1289 init_per_node(sdp, UNDO);
1291 init_inodes(sdp, UNDO);
1293 if (sdp->sd_root_dir)
1294 dput(sdp->sd_root_dir);
1295 if (sdp->sd_master_dir)
1296 dput(sdp->sd_master_dir);
1301 init_locking(sdp, &mount_gh, UNDO);
1303 complete_all(&sdp->sd_journal_ready);
1304 gfs2_gl_hash_clear(sdp);
1305 gfs2_lm_unmount(sdp);
1307 gfs2_delete_debugfs_file(sdp);
1308 gfs2_sys_fs_del(sdp);
1311 sb->s_fs_info = NULL;
1316 * gfs2_get_tree - Get the GFS2 superblock and root directory
1317 * @fc: The filesystem context
1319 * Returns: 0 or -errno on error
1321 static int gfs2_get_tree(struct fs_context *fc)
1323 struct gfs2_args *args = fc->fs_private;
1324 struct gfs2_sbd *sdp;
1327 error = get_tree_bdev(fc, gfs2_fill_super);
1331 sdp = fc->root->d_sb->s_fs_info;
1334 fc->root = dget(sdp->sd_master_dir);
1336 fc->root = dget(sdp->sd_root_dir);
1340 static void gfs2_fc_free(struct fs_context *fc)
1342 struct gfs2_args *args = fc->fs_private;
1352 Opt_ignore_local_fs,
1374 static const struct constant_table gfs2_param_quota[] = {
1375 {"off", GFS2_QUOTA_OFF},
1376 {"account", GFS2_QUOTA_ACCOUNT},
1377 {"on", GFS2_QUOTA_ON},
1382 Opt_data_writeback = GFS2_DATA_WRITEBACK,
1383 Opt_data_ordered = GFS2_DATA_ORDERED,
1386 static const struct constant_table gfs2_param_data[] = {
1387 {"writeback", Opt_data_writeback },
1388 {"ordered", Opt_data_ordered },
1393 Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW,
1394 Opt_errors_panic = GFS2_ERRORS_PANIC,
1397 static const struct constant_table gfs2_param_errors[] = {
1398 {"withdraw", Opt_errors_withdraw },
1399 {"panic", Opt_errors_panic },
1403 static const struct fs_parameter_spec gfs2_fs_parameters[] = {
1404 fsparam_string ("lockproto", Opt_lockproto),
1405 fsparam_string ("locktable", Opt_locktable),
1406 fsparam_string ("hostdata", Opt_hostdata),
1407 fsparam_flag ("spectator", Opt_spectator),
1408 fsparam_flag ("norecovery", Opt_spectator),
1409 fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs),
1410 fsparam_flag ("localflocks", Opt_localflocks),
1411 fsparam_flag ("localcaching", Opt_localcaching),
1412 fsparam_flag_no("debug", Opt_debug),
1413 fsparam_flag ("upgrade", Opt_upgrade),
1414 fsparam_flag_no("acl", Opt_acl),
1415 fsparam_flag_no("suiddir", Opt_suiddir),
1416 fsparam_enum ("data", Opt_data, gfs2_param_data),
1417 fsparam_flag ("meta", Opt_meta),
1418 fsparam_flag_no("discard", Opt_discard),
1419 fsparam_s32 ("commit", Opt_commit),
1420 fsparam_enum ("errors", Opt_errors, gfs2_param_errors),
1421 fsparam_s32 ("statfs_quantum", Opt_statfs_quantum),
1422 fsparam_s32 ("statfs_percent", Opt_statfs_percent),
1423 fsparam_s32 ("quota_quantum", Opt_quota_quantum),
1424 fsparam_flag_no("barrier", Opt_barrier),
1425 fsparam_flag_no("rgrplvb", Opt_rgrplvb),
1426 fsparam_flag_no("loccookie", Opt_loccookie),
1427 /* quota can be a flag or an enum so it gets special treatment */
1428 fsparam_flag_no("quota", Opt_quota_flag),
1429 fsparam_enum("quota", Opt_quota, gfs2_param_quota),
1433 /* Parse a single mount parameter */
1434 static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
1436 struct gfs2_args *args = fc->fs_private;
1437 struct fs_parse_result result;
1440 o = fs_parse(fc, gfs2_fs_parameters, param, &result);
1446 strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN);
1449 strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN);
1452 strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN);
1455 args->ar_spectator = 1;
1457 case Opt_ignore_local_fs:
1458 /* Retained for backwards compat only */
1460 case Opt_localflocks:
1461 args->ar_localflocks = 1;
1463 case Opt_localcaching:
1464 /* Retained for backwards compat only */
1467 if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC)
1468 return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
1469 args->ar_debug = result.boolean;
1472 /* Retained for backwards compat only */
1475 args->ar_posix_acl = result.boolean;
1477 case Opt_quota_flag:
1478 args->ar_quota = result.negated ? GFS2_QUOTA_OFF : GFS2_QUOTA_ON;
1481 args->ar_quota = result.int_32;
1484 args->ar_suiddir = result.boolean;
1487 /* The uint_32 result maps directly to GFS2_DATA_* */
1488 args->ar_data = result.uint_32;
1494 args->ar_discard = result.boolean;
1497 if (result.int_32 <= 0)
1498 return invalfc(fc, "commit mount option requires a positive numeric argument");
1499 args->ar_commit = result.int_32;
1501 case Opt_statfs_quantum:
1502 if (result.int_32 < 0)
1503 return invalfc(fc, "statfs_quantum mount option requires a non-negative numeric argument");
1504 args->ar_statfs_quantum = result.int_32;
1506 case Opt_quota_quantum:
1507 if (result.int_32 <= 0)
1508 return invalfc(fc, "quota_quantum mount option requires a positive numeric argument");
1509 args->ar_quota_quantum = result.int_32;
1511 case Opt_statfs_percent:
1512 if (result.int_32 < 0 || result.int_32 > 100)
1513 return invalfc(fc, "statfs_percent mount option requires a numeric argument between 0 and 100");
1514 args->ar_statfs_percent = result.int_32;
1517 if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC)
1518 return invalfc(fc, "-o debug and -o errors=panic are mutually exclusive");
1519 args->ar_errors = result.uint_32;
1522 args->ar_nobarrier = result.boolean;
1525 args->ar_rgrplvb = result.boolean;
1526 args->ar_got_rgrplvb = 1;
1529 args->ar_loccookie = result.boolean;
1532 return invalfc(fc, "invalid mount option: %s", param->key);
1537 static int gfs2_reconfigure(struct fs_context *fc)
1539 struct super_block *sb = fc->root->d_sb;
1540 struct gfs2_sbd *sdp = sb->s_fs_info;
1541 struct gfs2_args *oldargs = &sdp->sd_args;
1542 struct gfs2_args *newargs = fc->fs_private;
1543 struct gfs2_tune *gt = &sdp->sd_tune;
1546 sync_filesystem(sb);
1548 spin_lock(>->gt_spin);
1549 oldargs->ar_commit = gt->gt_logd_secs;
1550 oldargs->ar_quota_quantum = gt->gt_quota_quantum;
1551 if (gt->gt_statfs_slow)
1552 oldargs->ar_statfs_quantum = 0;
1554 oldargs->ar_statfs_quantum = gt->gt_statfs_quantum;
1555 spin_unlock(>->gt_spin);
1557 if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) {
1558 errorfc(fc, "reconfiguration of locking protocol not allowed");
1561 if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) {
1562 errorfc(fc, "reconfiguration of lock table not allowed");
1565 if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) {
1566 errorfc(fc, "reconfiguration of host data not allowed");
1569 if (newargs->ar_spectator != oldargs->ar_spectator) {
1570 errorfc(fc, "reconfiguration of spectator mode not allowed");
1573 if (newargs->ar_localflocks != oldargs->ar_localflocks) {
1574 errorfc(fc, "reconfiguration of localflocks not allowed");
1577 if (newargs->ar_meta != oldargs->ar_meta) {
1578 errorfc(fc, "switching between gfs2 and gfs2meta not allowed");
1581 if (oldargs->ar_spectator)
1582 fc->sb_flags |= SB_RDONLY;
1584 if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) {
1585 struct gfs2_holder freeze_gh;
1587 error = gfs2_freeze_lock(sdp, &freeze_gh, 0);
1591 if (fc->sb_flags & SB_RDONLY) {
1592 gfs2_make_fs_ro(sdp);
1594 error = gfs2_make_fs_rw(sdp);
1596 errorfc(fc, "unable to remount read-write");
1598 gfs2_freeze_unlock(&freeze_gh);
1600 sdp->sd_args = *newargs;
1602 if (sdp->sd_args.ar_posix_acl)
1603 sb->s_flags |= SB_POSIXACL;
1605 sb->s_flags &= ~SB_POSIXACL;
1606 if (sdp->sd_args.ar_nobarrier)
1607 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1609 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1610 spin_lock(>->gt_spin);
1611 gt->gt_logd_secs = newargs->ar_commit;
1612 gt->gt_quota_quantum = newargs->ar_quota_quantum;
1613 if (newargs->ar_statfs_quantum) {
1614 gt->gt_statfs_slow = 0;
1615 gt->gt_statfs_quantum = newargs->ar_statfs_quantum;
1618 gt->gt_statfs_slow = 1;
1619 gt->gt_statfs_quantum = 30;
1621 spin_unlock(>->gt_spin);
1623 gfs2_online_uevent(sdp);
1627 static const struct fs_context_operations gfs2_context_ops = {
1628 .free = gfs2_fc_free,
1629 .parse_param = gfs2_parse_param,
1630 .get_tree = gfs2_get_tree,
1631 .reconfigure = gfs2_reconfigure,
1634 /* Set up the filesystem mount context */
1635 static int gfs2_init_fs_context(struct fs_context *fc)
1637 struct gfs2_args *args;
1639 args = kmalloc(sizeof(*args), GFP_KERNEL);
1643 if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
1644 struct gfs2_sbd *sdp = fc->root->d_sb->s_fs_info;
1646 *args = sdp->sd_args;
1648 memset(args, 0, sizeof(*args));
1649 args->ar_quota = GFS2_QUOTA_DEFAULT;
1650 args->ar_data = GFS2_DATA_DEFAULT;
1651 args->ar_commit = 30;
1652 args->ar_statfs_quantum = 30;
1653 args->ar_quota_quantum = 60;
1654 args->ar_errors = GFS2_ERRORS_DEFAULT;
1656 fc->fs_private = args;
1657 fc->ops = &gfs2_context_ops;
1661 static int set_meta_super(struct super_block *s, struct fs_context *fc)
1666 static int test_meta_super(struct super_block *s, struct fs_context *fc)
1668 return (fc->sget_key == s->s_bdev);
1671 static int gfs2_meta_get_tree(struct fs_context *fc)
1673 struct super_block *s;
1674 struct gfs2_sbd *sdp;
1678 if (!fc->source || !*fc->source)
1681 error = kern_path(fc->source, LOOKUP_FOLLOW, &path);
1683 pr_warn("path_lookup on %s returned error %d\n",
1687 fc->fs_type = &gfs2_fs_type;
1688 fc->sget_key = path.dentry->d_sb->s_bdev;
1689 s = sget_fc(fc, test_meta_super, set_meta_super);
1692 pr_warn("gfs2 mount does not exist\n");
1695 if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) {
1696 deactivate_locked_super(s);
1700 fc->root = dget(sdp->sd_master_dir);
1704 static const struct fs_context_operations gfs2_meta_context_ops = {
1705 .free = gfs2_fc_free,
1706 .get_tree = gfs2_meta_get_tree,
1709 static int gfs2_meta_init_fs_context(struct fs_context *fc)
1711 int ret = gfs2_init_fs_context(fc);
1716 fc->ops = &gfs2_meta_context_ops;
1720 static void gfs2_kill_sb(struct super_block *sb)
1722 struct gfs2_sbd *sdp = sb->s_fs_info;
1725 kill_block_super(sb);
1729 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB);
1730 dput(sdp->sd_root_dir);
1731 dput(sdp->sd_master_dir);
1732 sdp->sd_root_dir = NULL;
1733 sdp->sd_master_dir = NULL;
1734 shrink_dcache_sb(sb);
1735 kill_block_super(sb);
1738 struct file_system_type gfs2_fs_type = {
1740 .fs_flags = FS_REQUIRES_DEV,
1741 .init_fs_context = gfs2_init_fs_context,
1742 .parameters = gfs2_fs_parameters,
1743 .kill_sb = gfs2_kill_sb,
1744 .owner = THIS_MODULE,
1746 MODULE_ALIAS_FS("gfs2");
1748 struct file_system_type gfs2meta_fs_type = {
1750 .fs_flags = FS_REQUIRES_DEV,
1751 .init_fs_context = gfs2_meta_init_fs_context,
1752 .owner = THIS_MODULE,
1754 MODULE_ALIAS_FS("gfs2meta");