NFS: Detect loops in a readdir due to bad cookies
Some filesystems (such as ext4) can return the same cookie value for
multiple files. If we try to start a readdir with one of these cookies,
the server will return the first file found with a cookie of the same
value. This can cause the client to enter an infinite loop.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 4b851a0..4179c36 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -100,6 +100,8 @@
struct nfs_open_dir_context {
struct rpc_cred *cred;
__u64 dir_cookie;
+ __u64 dup_cookie;
+ int duped;
};
/*