aboutsummaryrefslogtreecommitdiffstats
path: root/fs/f2fs/super.c
diff options
context:
space:
mode:
authorChangman Lee <cm224.lee@samsung.com>2013-01-29 04:30:07 -0500
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2013-02-11 17:15:00 -0500
commitd6212a5f18c8f9f9cc884070a96e11907711217f (patch)
treed1c579ecdeb7c2ffc94bffbe0b51af4d2e3c49f3 /fs/f2fs/super.c
parenta2617dc6863b21a8109c199ab533b3dbfe178f27 (diff)
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.c18
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)
143 return 0; 143 return 0;
144} 144}
145 145
146static int f2fs_freeze(struct super_block *sb)
147{
148 int err;
149
150 if (sb->s_flags & MS_RDONLY)
151 return 0;
152
153 err = f2fs_sync_fs(sb, 1);
154 return err;
155}
156
157static int f2fs_unfreeze(struct super_block *sb)
158{
159 return 0;
160}
161
146static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf) 162static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
147{ 163{
148 struct super_block *sb = dentry->d_sb; 164 struct super_block *sb = dentry->d_sb;
@@ -213,6 +229,8 @@ static struct super_operations f2fs_sops = {
213 .evict_inode = f2fs_evict_inode, 229 .evict_inode = f2fs_evict_inode,
214 .put_super = f2fs_put_super, 230 .put_super = f2fs_put_super,
215 .sync_fs = f2fs_sync_fs, 231 .sync_fs = f2fs_sync_fs,
232 .freeze_fs = f2fs_freeze,
233 .unfreeze_fs = f2fs_unfreeze,
216 .statfs = f2fs_statfs, 234 .statfs = f2fs_statfs,
217}; 235};
218 236