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| author | Changman Lee <cm224.lee@samsung.com> | 2013-01-29 13:30:07 +0400 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-02-12 02:15:00 +0400 |
| commit | d6212a5f18c8f9f9cc884070a96e11907711217f (patch) | |
| tree | d1c579ecdeb7c2ffc94bffbe0b51af4d2e3c49f3 /fs/f2fs/super.c | |
| parent | a2617dc6863b21a8109c199ab533b3dbfe178f27 (diff) | |
| download | linux-d6212a5f18c8f9f9cc884070a96e11907711217f.tar.xz | |
f2fs: add un/freeze_fs into super_operations
This patch supports ioctl FIFREEZE and FITHAW to snapshot filesystem.
Before calling f2fs_freeze, all writers would be suspended and sync_fs
would be completed. So no f2fs has to do something.
Just background gc operation should be skipped due to generate dirty
nodes and data until unfreeze.
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 25656b6869a4..0b18aee2ed25 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -143,6 +143,22 @@ int f2fs_sync_fs(struct super_block *sb, int sync) return 0; } +static int f2fs_freeze(struct super_block *sb) +{ + int err; + + if (sb->s_flags & MS_RDONLY) + return 0; + + err = f2fs_sync_fs(sb, 1); + return err; +} + +static int f2fs_unfreeze(struct super_block *sb) +{ + return 0; +} + static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; @@ -213,6 +229,8 @@ static struct super_operations f2fs_sops = { .evict_inode = f2fs_evict_inode, .put_super = f2fs_put_super, .sync_fs = f2fs_sync_fs, + .freeze_fs = f2fs_freeze, + .unfreeze_fs = f2fs_unfreeze, .statfs = f2fs_statfs, }; |