[PATCH] Fill in rqstp->rq_daddr in svc_tcp_recvfrom

[Olaf Kirch <okir@suse.de>]

Here's a patch we added to SLES in response to a customer bug report:

# Subject: Fill in rqstp->rq_daddr in svc_tcp_recvfrom
#
# This patch fills the daddr member of the rpc struct svc_rqst structure for  
# TCP-based sockets in the recvfrom proceedure.  Currently, the field is 
# not set thus leaving it with left over garbage from a previous allocation. 
#
# This makes the behavior consistent between UDP- and TCP-based RPC. 
#
# This patch enables HA software to failover TCP-based RPC services
# such as TCP-based NFS. 
#
# Signed-off-by: okir@suse.de

Index: linux-2.6.12.orig/net/sunrpc/svcsock.c
===================================================================
--- linux-2.6.12.orig/net/sunrpc/svcsock.c	2005-07-08 11:45:25.000000000 +0200
+++ linux-2.6.12/net/sunrpc/svcsock.c	2005-07-12 10:57:05.000000000 +0200
@@ -455,8 +455,9 @@ svc_recvfrom(struct svc_rqst *rqstp, str
 	struct socket	*sock;
 	int		len, alen;
 
-	rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
 	sock = rqstp->rq_sock->sk_sock;
+	rqstp->rq_daddr = inet_sk((const struct sock *)sock)->rcv_saddr;
+	rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
 
 	msg.msg_name    = &rqstp->rq_addr;
 	msg.msg_namelen = sizeof(rqstp->rq_addr);
-- 
Olaf Kirch   |  --- o --- Nous sommes du soleil we love when we play
okir@suse.de |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax


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