From 95756482c9bfa375418c5a32455494a3042f65cd Mon Sep 17 00:00:00 2001
From: Chuck Lever <chuck.lever@oracle.com>
Date: Mon, 12 Feb 2007 00:53:38 -0800
Subject: [PATCH] [PATCH] knfsd: SUNRPC: support IPv6 addresses in RPC server's
UDP receive path
Add support for IPv6 addresses in the RPC server's UDP receive path.
[akpm@linux-foundation.org: cleanups]
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Aurelien Charbon <aurelien.charbon@ext.bull.net>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
include/linux/sunrpc/svc.h | 5 ++++
net/sunrpc/svcsock.c | 53 +++++++++++++++++++++++++++++++-------
2 files changed, 48 insertions(+), 10 deletions(-)
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 6d6892fa1d401..83b3c7b433aa4 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -270,6 +270,11 @@ static inline struct sockaddr_in *svc_addr_in(struct svc_rqst *rqst)
return (struct sockaddr_in *) &rqst->rq_addr;
}
+static inline struct sockaddr_in6 *svc_addr_in6(struct svc_rqst *rqst)
+{
+ return (struct sockaddr_in6 *) &rqst->rq_addr;
+}
+
static inline struct sockaddr *svc_addr(struct svc_rqst *rqst)
{
return (struct sockaddr *) &rqst->rq_addr;
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 72831b8a58fb8..6f509b9cae2c8 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -721,13 +721,53 @@ svc_write_space(struct sock *sk)
}
}
+static void svc_udp_get_sender_address(struct svc_rqst *rqstp,
+ struct sk_buff *skb)
+{
+ switch (rqstp->rq_sock->sk_sk->sk_family) {
+ case AF_INET: {
+ /* this seems to come from net/ipv4/udp.c:udp_recvmsg */
+ struct sockaddr_in *sin = svc_addr_in(rqstp);
+
+ sin->sin_family = AF_INET;
+ sin->sin_port = skb->h.uh->source;
+ sin->sin_addr.s_addr = skb->nh.iph->saddr;
+ rqstp->rq_addrlen = sizeof(struct sockaddr_in);
+ /* Remember which interface received this request */
+ rqstp->rq_daddr.addr.s_addr = skb->nh.iph->daddr;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6: {
+ /* this is derived from net/ipv6/udp.c:udpv6_recvmesg */
+ struct sockaddr_in6 *sin6 = svc_addr_in6(rqstp);
+
+ sin6->sin6_family = AF_INET6;
+ sin6->sin6_port = skb->h.uh->source;
+ sin6->sin6_flowinfo = 0;
+ sin6->sin6_scope_id = 0;
+ if (ipv6_addr_type(&sin6->sin6_addr) &
+ IPV6_ADDR_LINKLOCAL)
+ sin6->sin6_scope_id = IP6CB(skb)->iif;
+ ipv6_addr_copy(&sin6->sin6_addr,
+ &skb->nh.ipv6h->saddr);
+ rqstp->rq_addrlen = sizeof(struct sockaddr_in);
+ /* Remember which interface received this request */
+ ipv6_addr_copy(&rqstp->rq_daddr.addr6,
+ &skb->nh.ipv6h->saddr);
+ }
+ break;
+#endif
+ }
+ return;
+}
+
/*
* Receive a datagram from a UDP socket.
*/
static int
svc_udp_recvfrom(struct svc_rqst *rqstp)
{
- struct sockaddr_in *sin = svc_addr_in(rqstp);
struct svc_sock *svsk = rqstp->rq_sock;
struct svc_serv *serv = svsk->sk_server;
struct sk_buff *skb;
@@ -785,16 +825,9 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
len = skb->len - sizeof(struct udphdr);
rqstp->rq_arg.len = len;
- rqstp->rq_prot = IPPROTO_UDP;
-
- /* Get sender address */
- sin->sin_family = AF_INET;
- sin->sin_port = skb->h.uh->source;
- sin->sin_addr.s_addr = skb->nh.iph->saddr;
- rqstp->rq_addrlen = sizeof(struct sockaddr_in);
+ rqstp->rq_prot = IPPROTO_UDP;
- /* Remember which interface received this request */
- rqstp->rq_daddr.addr.s_addr = skb->nh.iph->daddr;
+ svc_udp_get_sender_address(rqstp, skb);
if (skb_is_nonlinear(skb)) {
/* we have to copy */
--
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