diff mbox series

[06/12] utimensat: AT_EMPTY_PATH support

Message ID 20191128155940.17530-7-mszeredi@redhat.com (mailing list archive)
State New, archived
Headers show
Series various vfs patches | expand

Commit Message

Miklos Szeredi Nov. 28, 2019, 3:59 p.m. UTC 
This makes it possible to use utimensat on an O_PATH file (including
symlinks).

It supersedes the nonstandard utimensat(fd, NULL, ...) form.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
 fs/utimes.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/fs/utimes.c b/fs/utimes.c
index 1ba3f7883870..c07cb0dddbb6 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -95,13 +95,13 @@  long do_utimes(int dfd, const char __user *filename, struct timespec64 *times,
 		goto out;
 	}
 
-	if (flags & ~AT_SYMLINK_NOFOLLOW)
+	if (flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH))
 		goto out;
 
 	if (filename == NULL && dfd != AT_FDCWD) {
 		struct fd f;
 
-		if (flags & AT_SYMLINK_NOFOLLOW)
+		if (flags)
 			goto out;
 
 		f = fdget(dfd);
@@ -117,6 +117,8 @@  long do_utimes(int dfd, const char __user *filename, struct timespec64 *times,
 
 		if (!(flags & AT_SYMLINK_NOFOLLOW))
 			lookup_flags |= LOOKUP_FOLLOW;
+		if (flags & AT_EMPTY_PATH)
+			lookup_flags |= LOOKUP_EMPTY;
 retry:
 		error = user_path_at(dfd, filename, lookup_flags, &path);
 		if (error)