From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 30 Aug 2006 14:32:49 -0400
SUNRPC: Handle ENETUNREACH, EHOSTUNREACH and EHOSTDOWN socket errors

In case of any of the above errors occuring, delay for 3 seconds, then
handle as if it were a timeout error.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

 net/sunrpc/clnt.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 87efcd2..355e786 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1030,6 +1030,14 @@ call_status(struct rpc_task *task)
 
 	task->tk_status = 0;
 	switch(status) {
+	case -EHOSTDOWN:
+	case -EHOSTUNREACH:
+	case -ENETUNREACH:
+		/*
+		 * Delay any retries for 3 seconds, then handle as if it
+		 * were a timeout.
+		 */
+		rpc_delay(task, 3*HZ);
 	case -ETIMEDOUT:
 		task->tk_action = call_timeout;
 		break;