[1/2] Btrfs-progs: mkfs: don't create extent for an empty file

Commit Message

Wang Shilong March 11, 2014, 10:29 a.m. UTC

Steps to reproduce:
 # mkdir -p /tmp/test
 # touch /tmp/test/file
 # mkfs.btrfs -f /dev/sda13 -r /tmp/test
 # btrfs check /dev/sda13

For an empty file, don't create extent data for it.

Signed-off-by: Wang Shilong <[e-mail]>
---
 mkfs.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/mkfs.c b/mkfs.c
index 2dc90c2..2f7dfef 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -619,6 +619,9 @@  static int add_file_items(struct btrfs_trans_handle *trans,
 	struct extent_buffer *eb = NULL;
 	int fd;
 
+	if (st->st_size == 0)
+		return 0;
+
 	fd = open(path_name, O_RDONLY);
 	if (fd == -1) {
 		fprintf(stderr, "%s open failed\n", path_name);