vfs: have do_sys_truncate retry once on an ESTALE error
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 c819bbda..07449b91 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -115,17 +115,23 @@
static long do_sys_truncate(const char __user *pathname, loff_t length)
{
+ unsigned int lookup_flags = LOOKUP_FOLLOW;
struct path path;
int error;
if (length < 0) /* sorry, but loff_t says... */
return -EINVAL;
- error = user_path(pathname, &path);
+retry:
+ error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (!error) {
error = vfs_truncate(&path, length);
path_put(&path);
}
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}