diff options
Diffstat (limited to 'fs/ext2/super.c')
| -rw-r--r-- | fs/ext2/super.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 9f311d27b16..af74d9e27b7 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -42,6 +42,8 @@ static void ext2_sync_super(struct super_block *sb, static int ext2_remount (struct super_block * sb, int * flags, char * data); static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf); static int ext2_sync_fs(struct super_block *sb, int wait); +static int ext2_freeze(struct super_block *sb); +static int ext2_unfreeze(struct super_block *sb); void ext2_error(struct super_block *sb, const char *function, const char *fmt, ...) @@ -305,6 +307,8 @@ static const struct super_operations ext2_sops = { .evict_inode = ext2_evict_inode, .put_super = ext2_put_super, .sync_fs = ext2_sync_fs, + .freeze_fs = ext2_freeze, + .unfreeze_fs = ext2_unfreeze, .statfs = ext2_statfs, .remount_fs = ext2_remount, .show_options = ext2_show_options, @@ -1200,6 +1204,35 @@ static int ext2_sync_fs(struct super_block *sb, int wait) return 0; } +static int ext2_freeze(struct super_block *sb) +{ + struct ext2_sb_info *sbi = EXT2_SB(sb); + + /* + * Open but unlinked files present? Keep EXT2_VALID_FS flag cleared + * because we have unattached inodes and thus filesystem is not fully + * consistent. + */ + if (atomic_long_read(&sb->s_remove_count)) { + ext2_sync_fs(sb, 1); + return 0; + } + /* Set EXT2_FS_VALID flag */ + spin_lock(&sbi->s_lock); + sbi->s_es->s_state = cpu_to_le16(sbi->s_mount_state); + spin_unlock(&sbi->s_lock); + ext2_sync_super(sb, sbi->s_es, 1); + + return 0; +} + +static int ext2_unfreeze(struct super_block *sb) +{ + /* Just write sb to clear EXT2_VALID_FS flag */ + ext2_write_super(sb); + + return 0; +} void ext2_write_super(struct super_block *sb) { |