vfs: add RENAME_WHITEOUT

This adds a new RENAME_WHITEOUT flag.  This flag makes rename() create a
whiteout of source.  The whiteout creation is atomic relative to the
rename.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index ca1a11bb4443..3735fa0a6784 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -37,6 +37,7 @@
 
 #define RENAME_NOREPLACE        (1 << 0)        /* Don't overwrite target */
 #define RENAME_EXCHANGE         (1 << 1)        /* Exchange source and dest */
+#define RENAME_WHITEOUT         (1 << 2)        /* Whiteout source */
 
 struct fstrim_range {
         __u64 start;