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authorChuck Lever <chuck.lever@oracle.com>2007-02-12 00:53:36 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:36 -0800
commitb92503b25c3f794cff5f96626ea3ecba8d10d254 (patch)
treea3bd2e04e1f748f0bdd1ce54b5ec79a393815efa /net/sunrpc/svcsock.c
parent[PATCH] knfsd: SUNRPC: Make rq_daddr field address-version independent (diff)
downloadlinux-dev-b92503b25c3f794cff5f96626ea3ecba8d10d254.tar.xz
linux-dev-b92503b25c3f794cff5f96626ea3ecba8d10d254.zip
[PATCH] knfsd: SUNRPC: teach svc_sendto() to deal with IPv6 addresses
CMSG_DATA comes in different sizes, depending on address family. [akpm@linux-foundation.org: remove unneeded do/while (0)] 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>
Diffstat (limited to '')
-rw-r--r--net/sunrpc/svcsock.c65
1 files changed, 48 insertions, 17 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 9d7a819149ce..a89d04bd3855 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -36,6 +36,7 @@
#include <net/sock.h>
#include <net/checksum.h>
#include <net/ip.h>
+#include <net/ipv6.h>
#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/ioctls.h>
@@ -446,6 +447,43 @@ svc_wake_up(struct svc_serv *serv)
}
}
+union svc_pktinfo_u {
+ struct in_pktinfo pkti;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct in6_pktinfo pkti6;
+#endif
+};
+
+static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
+{
+ switch (rqstp->rq_sock->sk_sk->sk_family) {
+ case AF_INET: {
+ struct in_pktinfo *pki = CMSG_DATA(cmh);
+
+ cmh->cmsg_level = SOL_IP;
+ cmh->cmsg_type = IP_PKTINFO;
+ pki->ipi_ifindex = 0;
+ pki->ipi_spec_dst.s_addr = rqstp->rq_daddr.addr.s_addr;
+ cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6: {
+ struct in6_pktinfo *pki = CMSG_DATA(cmh);
+
+ cmh->cmsg_level = SOL_IPV6;
+ cmh->cmsg_type = IPV6_PKTINFO;
+ pki->ipi6_ifindex = 0;
+ ipv6_addr_copy(&pki->ipi6_addr,
+ &rqstp->rq_daddr.addr6);
+ cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
+ }
+ break;
+#endif
+ }
+ return;
+}
+
/*
* Generic sendto routine
*/
@@ -455,9 +493,8 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
struct svc_sock *svsk = rqstp->rq_sock;
struct socket *sock = svsk->sk_sock;
int slen;
- char buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];
+ char buffer[CMSG_SPACE(sizeof(union svc_pktinfo_u))];
struct cmsghdr *cmh = (struct cmsghdr *)buffer;
- struct in_pktinfo *pki = (struct in_pktinfo *)CMSG_DATA(cmh);
int len = 0;
int result;
int size;
@@ -470,21 +507,15 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
slen = xdr->len;
if (rqstp->rq_prot == IPPROTO_UDP) {
- /* set the source and destination */
- struct msghdr msg;
- msg.msg_name = &rqstp->rq_addr;
- msg.msg_namelen = rqstp->rq_addrlen;
- msg.msg_iov = NULL;
- msg.msg_iovlen = 0;
- msg.msg_flags = MSG_MORE;
-
- msg.msg_control = cmh;
- msg.msg_controllen = sizeof(buffer);
- cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
- cmh->cmsg_level = SOL_IP;
- cmh->cmsg_type = IP_PKTINFO;
- pki->ipi_ifindex = 0;
- pki->ipi_spec_dst.s_addr = rqstp->rq_daddr.addr.s_addr;
+ struct msghdr msg = {
+ .msg_name = &rqstp->rq_addr,
+ .msg_namelen = rqstp->rq_addrlen,
+ .msg_control = cmh,
+ .msg_controllen = sizeof(buffer),
+ .msg_flags = MSG_MORE,
+ };
+
+ svc_set_cmsg_data(rqstp, cmh);
if (sock_sendmsg(sock, &msg, 0) < 0)
goto out;