Commit 52442f9b authored Aug 30, 2016 by Benjamin Coddington Committed by Trond Myklebust Aug 30, 2016

NFS4: Avoid migration loops

If a server returns itself as a location while migrating, the client may
end up getting stuck attempting to migrate twice to the same server. Catch
this by checking if the nfs_client found is the same as the existing
client. For the other two callers to nfs4_set_client, the nfs_client will
always be ERR_PTR(-EINVAL).

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

parent 3dc14735

fs/nfs/nfs4client.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -817,6 +817,11 @@ static int nfs4_set_client(struct nfs_server *server,
		goto error;
		}

		if (server->nfs_client == clp) {
		error = -ELOOP;
		goto error;
		}

		/*
		* Query for the lease time on clientid setup or renewal
		*