NFSv4: Handle fatal ENETDOWN and ENETUNREACH errors

Ensure that the NFSv4 error handling code recognises the
RPC_TASK_NETUNREACH_FATAL flag, and handles the ENETDOWN and ENETUNREACH
errors accordingly.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 970f28dbf2539e3a1c54fd43011672059a528a61..1f7cc260b007eff4a18f120cbe421963c7add609 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -671,6 +671,15 @@ nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
        struct nfs_client *clp = server->nfs_client;
        int ret;
 
+       if ((task->tk_rpc_status == -ENETDOWN ||
+            task->tk_rpc_status == -ENETUNREACH) &&
+           task->tk_flags & RPC_TASK_NETUNREACH_FATAL) {
+               exception->delay = 0;
+               exception->recovering = 0;
+               exception->retry = 0;
+               return -EIO;
+       }
+
        ret = nfs4_do_handle_exception(server, errorcode, exception);
        if (exception->delay) {
                int ret2 = nfs4_exception_should_retrans(server, exception);