From: Jeff Layton <jlayton@redhat.com>
Date: Tue, 11 Dec 2012 17:10:17 +0000 (-0500)
Subject: vfs: make llistxattr retry once on ESTALE error
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bd9bbc9842bde1b14046cdbda1153f0d49061135;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

vfs: make llistxattr retry once on ESTALE error

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

diff --git a/fs/xattr.c b/fs/xattr.c
index 1dc1eac17319..49d09e158809 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -595,12 +595,17 @@ SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
 {
 	struct path path;
 	ssize_t error;
-
-	error = user_lpath(pathname, &path);
+	unsigned int lookup_flags = 0;
+retry:
+	error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
 	if (error)
 		return error;
 	error = listxattr(path.dentry, list, size);
 	path_put(&path);
+	if (retry_estale(error, lookup_flags)) {
+		lookup_flags |= LOOKUP_REVAL;
+		goto retry;
+	}
 	return error;
 }