[PATCH] knfsd: SUNRPC: Make rq_daddr field address-version independent

The rq_daddr field must support larger addresses.

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>

2 files changed, 13 insertions, 6 deletions

diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 96c1b6ae7d96..6d6892fa1d40 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -11,6 +11,7 @@
 #define SUNRPC_SVC_H
 
 #include <linux/in.h>
+#include <linux/in6.h>
 #include <linux/sunrpc/types.h>
 #include <linux/sunrpc/xdr.h>
 #include <linux/sunrpc/auth.h>
@@ -191,7 +192,13 @@ static inline void svc_putu32(struct kvec *iov, __be32 val)
         iov->iov_len += sizeof(__be32);
 }
 
-        
+union svc_addr_u {
+    struct in_addr      addr;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+    struct in6_addr     addr6;
+#endif
+};
+
 /*
  * The context of a single thread, including the request currently being
  * processed.
@@ -227,8 +234,8 @@ struct svc_rqst {
         unsigned short
                                 rq_secure  : 1; /* secure port */
 
-
-        __be32                  rq_daddr;       /* dest addr of request - reply from here */
+        union svc_addr_u        rq_daddr;       /* dest addr of request
+                                                 *  - reply from here */
 
         void *                  rq_argp;        /* decoded arguments */
         void *                  rq_resp;        /* xdr'd results */
@@ -308,7 +315,7 @@ struct svc_deferred_req {
         struct svc_sock         *svsk;
         struct sockaddr_storage addr;   /* where reply must go */
         size_t                  addrlen;
-        __be32                  daddr;  /* where reply must come from */
+        union svc_addr_u        daddr;  /* where reply must come from */
         struct cache_deferred_req handle;
         int                     argslen;
         __be32                  args[0];
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index b11669670baa..9d7a819149ce 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -484,7 +484,7 @@ svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr)
                 cmh->cmsg_level = SOL_IP;
                 cmh->cmsg_type = IP_PKTINFO;
                 pki->ipi_ifindex = 0;
-                pki->ipi_spec_dst.s_addr = rqstp->rq_daddr;
+                pki->ipi_spec_dst.s_addr = rqstp->rq_daddr.addr.s_addr;
 
                 if (sock_sendmsg(sock, &msg, 0) < 0)
                         goto out;
@@ -763,7 +763,7 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
         rqstp->rq_addrlen = sizeof(struct sockaddr_in);
 
         /* Remember which interface received this request */
-        rqstp->rq_daddr = skb->nh.iph->daddr;
+        rqstp->rq_daddr.addr.s_addr = skb->nh.iph->daddr;
 
         if (skb_is_nonlinear(skb)) {
                 /* we have to copy */