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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-06-28 17:49:29 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-07-23 10:02:10 +0900 |
| commit | 7ecaa46cfea453238a369b3019739d50ff5d7c37 (patch) | |
| tree | c69911a31c3a2cd4966979de2d34764e08471f2a /fs/nilfs2/super.c | |
| parent | bde4e696e4a527c3cc579ed77e4844d11ca17e12 (diff) | |
| download | lwn-7ecaa46cfea453238a369b3019739d50ff5d7c37.tar.gz lwn-7ecaa46cfea453238a369b3019739d50ff5d7c37.zip | |
nilfs2: add nilfs_cleanup_super
This function write out filesystem state to super blocks in order to
share the same cleanup work. This is a preparation for making super
block writeback alternately.
Cc: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/super.c')
| -rw-r--r-- | fs/nilfs2/super.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 39b28cf3cf8e..f23a31b04e14 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -278,6 +278,24 @@ int nilfs_commit_super(struct nilfs_sb_info *sbi, int dupsb) return nilfs_sync_super(sbi, dupsb); } +/** + * nilfs_cleanup_super() - write filesystem state for cleanup + * @sbi: nilfs_sb_info to be unmounted or degraded to read-only + * + * This function restores state flags in the on-disk super block. + * This will set "clean" flag (i.e. NILFS_VALID_FS) unless the + * filesystem was not clean previously. + */ +int nilfs_cleanup_super(struct nilfs_sb_info *sbi) +{ + struct nilfs_super_block **sbp = sbi->s_nilfs->ns_sbp; + int ret; + + sbp[0]->s_state = cpu_to_le16(sbi->s_nilfs->ns_mount_state); + ret = nilfs_commit_super(sbi, 1); + return ret; +} + static void nilfs_put_super(struct super_block *sb) { struct nilfs_sb_info *sbi = NILFS_SB(sb); @@ -289,8 +307,7 @@ static void nilfs_put_super(struct super_block *sb) if (!(sb->s_flags & MS_RDONLY)) { down_write(&nilfs->ns_sem); - nilfs->ns_sbp[0]->s_state = cpu_to_le16(nilfs->ns_mount_state); - nilfs_commit_super(sbi, 1); + nilfs_cleanup_super(sbi); up_write(&nilfs->ns_sem); } down_write(&nilfs->ns_super_sem); @@ -819,7 +836,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent, static int nilfs_remount(struct super_block *sb, int *flags, char *data) { struct nilfs_sb_info *sbi = NILFS_SB(sb); - struct nilfs_super_block *sbp; struct the_nilfs *nilfs = sbi->s_nilfs; unsigned long old_sb_flags; struct nilfs_mount_options old_opts; @@ -880,11 +896,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) * the RDONLY flag and then mark the partition as valid again. */ down_write(&nilfs->ns_sem); - sbp = nilfs->ns_sbp[0]; - if (!(sbp->s_state & le16_to_cpu(NILFS_VALID_FS)) && - (nilfs->ns_mount_state & NILFS_VALID_FS)) - sbp->s_state = cpu_to_le16(nilfs->ns_mount_state); - nilfs_commit_super(sbi, 1); + nilfs_cleanup_super(sbi); up_write(&nilfs->ns_sem); } else { /* |