VFS: Make link_path_walk set LOOKUP_CONTINUE before calling permission().
This will allow nfs_permission() to perform additional optimizations when
walking the path, by folding the ACCESS(MAY_EXEC) call on the directory
into the lookup revalidation.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/namei.c b/fs/namei.c
index 0d1dff7..aaaa810 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -763,6 +763,7 @@
struct qstr this;
unsigned int c;
+ nd->flags |= LOOKUP_CONTINUE;
err = exec_permission_lite(inode, nd);
if (err == -EAGAIN) {
err = permission(inode, MAY_EXEC, nd);
@@ -815,7 +816,6 @@
if (err < 0)
break;
}
- nd->flags |= LOOKUP_CONTINUE;
/* This does the actual lookups.. */
err = do_lookup(nd, &this, &next);
if (err)