2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/vmalloc.h>
16 #include <linux/blkdev.h>
17 #include <linux/kthread.h>
18 #include <linux/namei.h>
19 #include <linux/mount.h>
20 #include <linux/gfs2_ondisk.h>
23 #include "lm_interface.h"
31 #include "ops_export.h"
32 #include "ops_fstype.h"
33 #include "ops_super.h"
43 extern struct dentry_operations gfs2_dops;
45 static struct gfs2_sbd *init_sbd(struct super_block *sb)
50 sdp = vmalloc(sizeof(struct gfs2_sbd));
54 memset(sdp, 0, sizeof(struct gfs2_sbd));
59 gfs2_tune_init(&sdp->sd_tune);
61 for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
62 rwlock_init(&sdp->sd_gl_hash[x].hb_lock);
63 INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
65 INIT_LIST_HEAD(&sdp->sd_reclaim_list);
66 spin_lock_init(&sdp->sd_reclaim_lock);
67 init_waitqueue_head(&sdp->sd_reclaim_wq);
69 mutex_init(&sdp->sd_inum_mutex);
70 spin_lock_init(&sdp->sd_statfs_spin);
71 mutex_init(&sdp->sd_statfs_mutex);
73 spin_lock_init(&sdp->sd_rindex_spin);
74 mutex_init(&sdp->sd_rindex_mutex);
75 INIT_LIST_HEAD(&sdp->sd_rindex_list);
76 INIT_LIST_HEAD(&sdp->sd_rindex_mru_list);
77 INIT_LIST_HEAD(&sdp->sd_rindex_recent_list);
79 INIT_LIST_HEAD(&sdp->sd_jindex_list);
80 spin_lock_init(&sdp->sd_jindex_spin);
81 mutex_init(&sdp->sd_jindex_mutex);
83 INIT_LIST_HEAD(&sdp->sd_quota_list);
84 spin_lock_init(&sdp->sd_quota_spin);
85 mutex_init(&sdp->sd_quota_mutex);
87 spin_lock_init(&sdp->sd_log_lock);
89 INIT_LIST_HEAD(&sdp->sd_log_le_gl);
90 INIT_LIST_HEAD(&sdp->sd_log_le_buf);
91 INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
92 INIT_LIST_HEAD(&sdp->sd_log_le_rg);
93 INIT_LIST_HEAD(&sdp->sd_log_le_databuf);
95 mutex_init(&sdp->sd_log_reserve_mutex);
96 INIT_LIST_HEAD(&sdp->sd_ail1_list);
97 INIT_LIST_HEAD(&sdp->sd_ail2_list);
99 init_rwsem(&sdp->sd_log_flush_lock);
100 INIT_LIST_HEAD(&sdp->sd_log_flush_list);
102 INIT_LIST_HEAD(&sdp->sd_revoke_list);
104 mutex_init(&sdp->sd_freeze_lock);
109 static void init_vfs(struct super_block *sb, unsigned noatime)
111 struct gfs2_sbd *sdp = sb->s_fs_info;
113 sb->s_magic = GFS2_MAGIC;
114 sb->s_op = &gfs2_super_ops;
115 sb->s_export_op = &gfs2_export_ops;
116 sb->s_maxbytes = MAX_LFS_FILESIZE;
118 if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME))
119 set_bit(noatime, &sdp->sd_flags);
121 /* Don't let the VFS update atimes. GFS2 handles this itself. */
122 sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
125 static int init_names(struct gfs2_sbd *sdp, int silent)
127 struct gfs2_sb *sb = NULL;
131 proto = sdp->sd_args.ar_lockproto;
132 table = sdp->sd_args.ar_locktable;
134 /* Try to autodetect */
136 if (!proto[0] || !table[0]) {
137 struct buffer_head *bh;
138 bh = sb_getblk(sdp->sd_vfs,
139 GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift);
141 clear_buffer_uptodate(bh);
142 clear_buffer_dirty(bh);
144 ll_rw_block(READ, 1, &bh);
147 if (!buffer_uptodate(bh)) {
152 sb = kmalloc(sizeof(struct gfs2_sb), GFP_KERNEL);
157 gfs2_sb_in(sb, bh->b_data);
160 error = gfs2_check_sb(sdp, sb, silent);
165 proto = sb->sb_lockproto;
167 table = sb->sb_locktable;
171 table = sdp->sd_vfs->s_id;
173 snprintf(sdp->sd_proto_name, GFS2_FSNAME_LEN, "%s", proto);
174 snprintf(sdp->sd_table_name, GFS2_FSNAME_LEN, "%s", table);
182 static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh,
185 struct task_struct *p;
191 p = kthread_run(gfs2_scand, sdp, "gfs2_scand");
194 fs_err(sdp, "can't start scand thread: %d\n", error);
197 sdp->sd_scand_process = p;
199 for (sdp->sd_glockd_num = 0;
200 sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd;
201 sdp->sd_glockd_num++) {
202 p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd");
205 fs_err(sdp, "can't start glockd thread: %d\n", error);
208 sdp->sd_glockd_process[sdp->sd_glockd_num] = p;
211 error = gfs2_glock_nq_num(sdp,
212 GFS2_MOUNT_LOCK, &gfs2_nondisk_glops,
213 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE,
216 fs_err(sdp, "can't acquire mount glock: %d\n", error);
220 error = gfs2_glock_nq_num(sdp,
221 GFS2_LIVE_LOCK, &gfs2_nondisk_glops,
223 LM_FLAG_NOEXP | GL_EXACT,
226 fs_err(sdp, "can't acquire live glock: %d\n", error);
230 error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops,
231 CREATE, &sdp->sd_rename_gl);
233 fs_err(sdp, "can't create rename glock: %d\n", error);
237 error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops,
238 CREATE, &sdp->sd_trans_gl);
240 fs_err(sdp, "can't create transaction glock: %d\n", error);
243 set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags);
248 gfs2_glock_put(sdp->sd_trans_gl);
251 gfs2_glock_put(sdp->sd_rename_gl);
254 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
257 gfs2_glock_dq_uninit(mount_gh);
260 while (sdp->sd_glockd_num--)
261 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
263 kthread_stop(sdp->sd_scand_process);
268 static struct inode *gfs2_lookup_root(struct super_block *sb,
269 struct gfs2_inum *inum)
271 return gfs2_inode_lookup(sb, inum, DT_DIR);
274 static int init_sb(struct gfs2_sbd *sdp, int silent, int undo)
276 struct super_block *sb = sdp->sd_vfs;
277 struct gfs2_holder sb_gh;
278 struct gfs2_inum *inum;
290 error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops,
291 LM_ST_SHARED, 0, &sb_gh);
293 fs_err(sdp, "can't acquire superblock glock: %d\n", error);
297 error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent);
299 fs_err(sdp, "can't read superblock: %d\n", error);
303 /* Set up the buffer cache and SB for real */
304 if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) {
306 fs_err(sdp, "FS block size (%u) is too small for device "
308 sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev));
311 if (sdp->sd_sb.sb_bsize > PAGE_SIZE) {
313 fs_err(sdp, "FS block size (%u) is too big for machine "
315 sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE);
318 sb_set_blocksize(sb, sdp->sd_sb.sb_bsize);
320 /* Get the root inode */
321 inum = &sdp->sd_sb.sb_root_dir;
322 if (sb->s_type == &gfs2meta_fs_type)
323 inum = &sdp->sd_sb.sb_master_dir;
324 inode = gfs2_lookup_root(sb, inum);
326 error = PTR_ERR(inode);
327 fs_err(sdp, "can't read in root inode: %d\n", error);
331 sb->s_root = d_alloc_root(inode);
333 fs_err(sdp, "can't get root dentry\n");
337 sb->s_root->d_op = &gfs2_dops;
339 gfs2_glock_dq_uninit(&sb_gh);
343 static int init_journal(struct gfs2_sbd *sdp, int undo)
345 struct gfs2_holder ji_gh;
346 struct task_struct *p;
347 struct gfs2_inode *ip;
356 sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex");
357 if (IS_ERR(sdp->sd_jindex)) {
358 fs_err(sdp, "can't lookup journal index: %d\n", error);
359 return PTR_ERR(sdp->sd_jindex);
361 ip = GFS2_I(sdp->sd_jindex);
362 set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
364 /* Load in the journal index special file */
366 error = gfs2_jindex_hold(sdp, &ji_gh);
368 fs_err(sdp, "can't read journal index: %d\n", error);
373 if (!gfs2_jindex_size(sdp)) {
374 fs_err(sdp, "no journals!\n");
378 if (sdp->sd_args.ar_spectator) {
379 sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0);
380 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
382 if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) {
383 fs_err(sdp, "can't mount journal #%u\n",
384 sdp->sd_lockstruct.ls_jid);
385 fs_err(sdp, "there are only %u journals (0 - %u)\n",
386 gfs2_jindex_size(sdp),
387 gfs2_jindex_size(sdp) - 1);
390 sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid);
392 error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid,
394 LM_ST_EXCLUSIVE, LM_FLAG_NOEXP,
395 &sdp->sd_journal_gh);
397 fs_err(sdp, "can't acquire journal glock: %d\n", error);
401 ip = GFS2_I(sdp->sd_jdesc->jd_inode);
402 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED,
403 LM_FLAG_NOEXP | GL_EXACT,
406 fs_err(sdp, "can't acquire journal inode glock: %d\n",
408 goto fail_journal_gh;
411 error = gfs2_jdesc_check(sdp->sd_jdesc);
413 fs_err(sdp, "my journal (%u) is bad: %d\n",
414 sdp->sd_jdesc->jd_jid, error);
417 sdp->sd_log_blks_free = sdp->sd_jdesc->jd_blocks;
420 if (sdp->sd_lockstruct.ls_first) {
422 for (x = 0; x < sdp->sd_journals; x++) {
423 error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x));
425 fs_err(sdp, "error recovering journal %u: %d\n",
431 gfs2_lm_others_may_mount(sdp);
432 } else if (!sdp->sd_args.ar_spectator) {
433 error = gfs2_recover_journal(sdp->sd_jdesc);
435 fs_err(sdp, "error recovering my journal: %d\n", error);
440 set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags);
441 gfs2_glock_dq_uninit(&ji_gh);
444 p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd");
447 fs_err(sdp, "can't start recoverd thread: %d\n", error);
450 sdp->sd_recoverd_process = p;
455 kthread_stop(sdp->sd_recoverd_process);
458 if (!sdp->sd_args.ar_spectator)
459 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
462 if (!sdp->sd_args.ar_spectator)
463 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
466 gfs2_jindex_free(sdp);
468 gfs2_glock_dq_uninit(&ji_gh);
471 iput(sdp->sd_jindex);
477 static int init_inodes(struct gfs2_sbd *sdp, int undo)
480 struct gfs2_inode *ip;
486 inode = gfs2_lookup_root(sdp->sd_vfs, &sdp->sd_sb.sb_master_dir);
488 error = PTR_ERR(inode);
489 fs_err(sdp, "can't read in master directory: %d\n", error);
492 sdp->sd_master_dir = inode;
494 error = init_journal(sdp, undo);
498 /* Read in the master inode number inode */
499 sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum");
500 if (IS_ERR(sdp->sd_inum_inode)) {
501 error = PTR_ERR(sdp->sd_inum_inode);
502 fs_err(sdp, "can't read in inum inode: %d\n", error);
507 /* Read in the master statfs inode */
508 sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs");
509 if (IS_ERR(sdp->sd_statfs_inode)) {
510 error = PTR_ERR(sdp->sd_statfs_inode);
511 fs_err(sdp, "can't read in statfs inode: %d\n", error);
515 /* Read in the resource index inode */
516 sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex");
517 if (IS_ERR(sdp->sd_rindex)) {
518 error = PTR_ERR(sdp->sd_rindex);
519 fs_err(sdp, "can't get resource index inode: %d\n", error);
522 ip = GFS2_I(sdp->sd_rindex);
523 set_bit(GLF_STICKY, &ip->i_gl->gl_flags);
524 sdp->sd_rindex_vn = ip->i_gl->gl_vn - 1;
526 /* Read in the quota inode */
527 sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota");
528 if (IS_ERR(sdp->sd_quota_inode)) {
529 error = PTR_ERR(sdp->sd_quota_inode);
530 fs_err(sdp, "can't get quota file inode: %d\n", error);
536 iput(sdp->sd_quota_inode);
539 gfs2_clear_rgrpd(sdp);
540 iput(sdp->sd_rindex);
543 iput(sdp->sd_statfs_inode);
546 iput(sdp->sd_inum_inode);
548 init_journal(sdp, UNDO);
550 iput(sdp->sd_master_dir);
555 static int init_per_node(struct gfs2_sbd *sdp, int undo)
557 struct inode *pn = NULL;
560 struct gfs2_inode *ip;
562 if (sdp->sd_args.ar_spectator)
568 pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node");
571 fs_err(sdp, "can't find per_node directory: %d\n", error);
575 sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid);
576 sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf);
577 if (IS_ERR(sdp->sd_ir_inode)) {
578 error = PTR_ERR(sdp->sd_ir_inode);
579 fs_err(sdp, "can't find local \"ir\" file: %d\n", error);
583 sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid);
584 sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf);
585 if (IS_ERR(sdp->sd_sc_inode)) {
586 error = PTR_ERR(sdp->sd_sc_inode);
587 fs_err(sdp, "can't find local \"sc\" file: %d\n", error);
591 sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid);
592 sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf);
593 if (IS_ERR(sdp->sd_qc_inode)) {
594 error = PTR_ERR(sdp->sd_qc_inode);
595 fs_err(sdp, "can't find local \"qc\" file: %d\n", error);
602 ip = GFS2_I(sdp->sd_ir_inode);
603 error = gfs2_glock_nq_init(ip->i_gl,
607 fs_err(sdp, "can't lock local \"ir\" file: %d\n", error);
611 ip = GFS2_I(sdp->sd_sc_inode);
612 error = gfs2_glock_nq_init(ip->i_gl,
616 fs_err(sdp, "can't lock local \"sc\" file: %d\n", error);
620 ip = GFS2_I(sdp->sd_qc_inode);
621 error = gfs2_glock_nq_init(ip->i_gl,
625 fs_err(sdp, "can't lock local \"qc\" file: %d\n", error);
632 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
636 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
639 gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
642 iput(sdp->sd_qc_inode);
646 iput(sdp->sd_sc_inode);
649 iput(sdp->sd_ir_inode);
657 static int init_threads(struct gfs2_sbd *sdp, int undo)
659 struct task_struct *p;
665 sdp->sd_log_flush_time = jiffies;
666 sdp->sd_jindex_refresh_time = jiffies;
668 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
671 fs_err(sdp, "can't start logd thread: %d\n", error);
674 sdp->sd_logd_process = p;
676 sdp->sd_statfs_sync_time = jiffies;
677 sdp->sd_quota_sync_time = jiffies;
679 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
682 fs_err(sdp, "can't start quotad thread: %d\n", error);
685 sdp->sd_quotad_process = p;
691 kthread_stop(sdp->sd_quotad_process);
693 kthread_stop(sdp->sd_logd_process);
698 * fill_super - Read in superblock
699 * @sb: The VFS superblock
700 * @data: Mount options
701 * @silent: Don't complain if it's not a GFS2 filesystem
706 static int fill_super(struct super_block *sb, void *data, int silent)
708 struct gfs2_sbd *sdp;
709 struct gfs2_holder mount_gh;
714 printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
718 error = gfs2_mount_args(sdp, (char *)data, 0);
720 printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
724 init_vfs(sb, SDF_NOATIME);
726 /* Set up the buffer cache and fill in some fake block size values
727 to allow us to read-in the on-disk superblock. */
728 sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK);
729 sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits;
730 sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift -
731 GFS2_BASIC_BLOCK_SHIFT;
732 sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
734 error = init_names(sdp, silent);
738 error = gfs2_sys_fs_add(sdp);
742 error = gfs2_lm_mount(sdp, silent);
746 error = init_locking(sdp, &mount_gh, DO);
750 error = init_sb(sdp, silent, DO);
754 error = init_inodes(sdp, DO);
758 error = init_per_node(sdp, DO);
762 error = gfs2_statfs_init(sdp);
764 fs_err(sdp, "can't initialize statfs subsystem: %d\n", error);
768 error = init_threads(sdp, DO);
772 if (!(sb->s_flags & MS_RDONLY)) {
773 error = gfs2_make_fs_rw(sdp);
775 fs_err(sdp, "can't make FS RW: %d\n", error);
780 gfs2_glock_dq_uninit(&mount_gh);
785 init_threads(sdp, UNDO);
788 init_per_node(sdp, UNDO);
791 init_inodes(sdp, UNDO);
794 init_sb(sdp, 0, UNDO);
797 init_locking(sdp, &mount_gh, UNDO);
800 gfs2_gl_hash_clear(sdp, WAIT);
801 gfs2_lm_unmount(sdp);
802 while (invalidate_inodes(sb))
806 gfs2_sys_fs_del(sdp);
810 sb->s_fs_info = NULL;
815 static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
816 const char *dev_name, void *data, struct vfsmount *mnt)
818 struct super_block *sb;
819 struct gfs2_sbd *sdp;
820 int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
824 sdp = (struct gfs2_sbd*)sb->s_fs_info;
825 sdp->sd_gfs2mnt = mnt;
830 static int fill_super_meta(struct super_block *sb, struct super_block *new,
831 void *data, int silent)
833 struct gfs2_sbd *sdp = sb->s_fs_info;
837 new->s_fs_info = sdp;
838 sdp->sd_vfs_meta = sb;
840 init_vfs(new, SDF_NOATIME);
842 /* Get the master inode */
843 inode = igrab(sdp->sd_master_dir);
845 new->s_root = d_alloc_root(inode);
847 fs_err(sdp, "can't get root dentry\n");
851 new->s_root->d_op = &gfs2_dops;
855 static int set_bdev_super(struct super_block *s, void *data)
858 s->s_dev = s->s_bdev->bd_dev;
862 static int test_bdev_super(struct super_block *s, void *data)
864 return (void *)s->s_bdev == data;
867 static struct super_block* get_gfs2_sb(const char *dev_name)
871 struct file_system_type *fstype;
872 struct super_block *sb = NULL, *s;
876 error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd);
878 printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n",
882 error = vfs_getattr(nd.mnt, nd.dentry, &stat);
884 fstype = get_fs_type("gfs2");
885 list_for_each(l, &fstype->fs_supers) {
886 s = list_entry(l, struct super_block, s_instances);
887 if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) ||
888 (S_ISDIR(stat.mode) && s == nd.dentry->d_inode->i_sb)) {
894 printk(KERN_WARNING "GFS2: Unrecognized block device or "
895 "mount point %s", dev_name);
903 static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
904 const char *dev_name, void *data, struct vfsmount *mnt)
907 struct super_block *sb = NULL, *new;
908 struct gfs2_sbd *sdp;
909 char *gfs2mnt = NULL;
911 sb = get_gfs2_sb(dev_name);
913 printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
917 sdp = (struct gfs2_sbd*) sb->s_fs_info;
918 if (sdp->sd_vfs_meta) {
919 printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n");
923 mutex_lock(&sb->s_bdev->bd_mount_mutex);
924 new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
925 mutex_unlock(&sb->s_bdev->bd_mount_mutex);
927 error = PTR_ERR(new);
930 module_put(fs_type->owner);
931 new->s_flags = flags;
932 strlcpy(new->s_id, sb->s_id, sizeof(new->s_id));
933 sb_set_blocksize(new, sb->s_blocksize);
934 error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0);
936 up_write(&new->s_umount);
937 deactivate_super(new);
941 new->s_flags |= MS_ACTIVE;
943 /* Grab a reference to the gfs2 mount point */
944 atomic_inc(&sdp->sd_gfs2mnt->mnt_count);
945 return simple_set_mnt(mnt, new);
952 static void gfs2_kill_sb(struct super_block *sb)
954 kill_block_super(sb);
957 static void gfs2_kill_sb_meta(struct super_block *sb)
959 struct gfs2_sbd *sdp = sb->s_fs_info;
960 generic_shutdown_super(sb);
961 sdp->sd_vfs_meta = NULL;
962 atomic_dec(&sdp->sd_gfs2mnt->mnt_count);
965 struct file_system_type gfs2_fs_type = {
967 .fs_flags = FS_REQUIRES_DEV,
968 .get_sb = gfs2_get_sb,
969 .kill_sb = gfs2_kill_sb,
970 .owner = THIS_MODULE,
973 struct file_system_type gfs2meta_fs_type = {
975 .fs_flags = FS_REQUIRES_DEV,
976 .get_sb = gfs2_get_sb_meta,
977 .kill_sb = gfs2_kill_sb_meta,
978 .owner = THIS_MODULE,