SUNRPC: Retry wrap in case of memory allocation failure.

 For privacy we need to allocate extra pages to hold encrypted page data when
 wrapping requests.  This allocation may fail, and we handle that case by
 waiting and retrying.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 5342740..702ede3 100644 (file)
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -710,9 +710,16 @@ call_encode(struct rpc_task *task)
                rpc_exit(task, -EIO);
                return;
        }
-       if (encode != NULL)
-               task->tk_status = rpcauth_wrap_req(task, encode, req, p,
-                               task->tk_msg.rpc_argp);
+       if (encode == NULL)
+               return;
+
+       task->tk_status = rpcauth_wrap_req(task, encode, req, p,
+                       task->tk_msg.rpc_argp);
+       if (task->tk_status == -ENOMEM) {
+               /* XXX: Is this sane? */
+               rpc_delay(task, 3*HZ);
+               task->tk_status = -EAGAIN;
+       }
 }
 
 /*