From: Jeff Layton <jlayton@redhat.com>
Date: Tue, 11 Dec 2012 17:10:13 +0000 (-0500)
Subject: vfs: make fchownat retry once on ESTALE errors
X-Git-Tag: firefly_0821_release~3680^2~1354^2~10
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=99a5df37a03c99e57d0da4f847a515b658963fbb;p=firefly-linux-kernel-4.4.55.git

vfs: make fchownat retry once on ESTALE errors

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/open.c b/fs/open.c
index 99c3ce5f897b..9b33c0cbfacf 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -582,6 +582,7 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
 	lookup_flags = (flag & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
 	if (flag & AT_EMPTY_PATH)
 		lookup_flags |= LOOKUP_EMPTY;
+retry:
 	error = user_path_at(dfd, filename, lookup_flags, &path);
 	if (error)
 		goto out;
@@ -592,6 +593,10 @@ SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,
 	mnt_drop_write(path.mnt);
 out_release:
 	path_put(&path);
+	if (retry_estale(error, lookup_flags)) {
+		lookup_flags |= LOOKUP_REVAL;
+		goto retry;
+	}
 out:
 	return error;
 }