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authorMiklos Szeredi <mszeredi@redhat.com>2020-05-14 17:44:24 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2020-05-14 17:44:24 +0300
commit44a3b87444058b2cb055092cdebc63858707bf66 (patch)
tree5e4f969f0b34d36de230a06b66615f9ff57c7d74 /fs/utimes.c
parent9470451505efbcc9eef2d7e74251e6402f5ea385 (diff)
downloadlinux-44a3b87444058b2cb055092cdebc63858707bf66.tar.xz
utimensat: AT_EMPTY_PATH support
This makes it possible to use utimensat on an O_PATH file (including symlinks). It supersedes the nonstandard utimensat(fd, NULL, ...) form. Cc: linux-api@vger.kernel.org Cc: linux-man@vger.kernel.org Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/utimes.c')
-rw-r--r--fs/utimes.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/utimes.c b/fs/utimes.c
index 1d17ce98cb80..b7b927502d6e 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)