f2fs: recover date requested by fdatasync

In order to support SQLite that uses fdatasync instead of fsync, we should
guarantee the data requested by fdatasync can be recovered after sudden-power-
off.

So, let's remove the fdatasync condition in f2fs_sync_file.
Otherwise, we can restore the data after sudden-power-off due to nonexistence
of any fsync mark'ed node blocks.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d2d2b7d..157a635 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -147,9 +147,10 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 
        mutex_lock(&inode->i_mutex);
 
-       if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
-               goto out;
-
+       /*
+        * Both of fdatasync() and fsync() are able to be recovered from
+        * sudden-power-off.
+        */
        if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
                need_cp = true;
        else if (file_wrong_pino(inode))