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.

Miklos Szeredi committed 12 years ago

Commit 0d7a8551 parent 787fb6b2 files · +7 −2Browse files

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@@ -37,6 +37,7 @@ · 36 unmodified lines
37		37
38	#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */	38	#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
39	#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */	39	#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
		40	#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
40		41
41	struct fstrim_range {	42	struct fstrim_range {
42	__u64 start;	43	__u64 start;