f2fs: enable in-place-update for fdatasync

This patch enforces in-place-updates only when fdatasync is requested.
If we adopt this in-place-updates for the fdatasync, we can skip to write the
recovery information.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 9b888fbf08b6..95501358932c 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -127,7 +127,14 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
                 return 0;
 
         trace_f2fs_sync_file_enter(inode);
+
+        /* if fdatasync is triggered, let's do in-place-update */
+        if (datasync)
+                set_inode_flag(fi, FI_NEED_IPU);
+
         ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+        if (datasync)
+                clear_inode_flag(fi, FI_NEED_IPU);
         if (ret) {
                 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
                 return ret;