SUNRPC: Replace svc_addr_u by sockaddr_storage

For IPv6 local address, lockd can not callback to client for
missing scope id when binding address at inet6_bind:

 324       if (addr_type & IPV6_ADDR_LINKLOCAL) {
 325               if (addr_len >= sizeof(struct sockaddr_in6) &&
 326                   addr->sin6_scope_id) {
 327                       /* Override any existing binding, if another one
 328                        * is supplied by user.
 329                        */
 330                       sk->sk_bound_dev_if = addr->sin6_scope_id;
 331               }
 332
 333               /* Binding to link-local address requires an interface */
 334               if (!sk->sk_bound_dev_if) {
 335                       err = -EINVAL;
 336                       goto out_unlock;
 337               }

Replacing svc_addr_u by sockaddr_storage, let rqstp->rq_daddr contains more info
besides address.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 17 insertions, 6 deletions

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 767d494de7a..dfd686eb0b7 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -143,19 +143,20 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *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;
+                        pki->ipi_spec_dst.s_addr =
+                                 svc_daddr_in(rqstp)->sin_addr.s_addr;
                         cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
                 }
                 break;
 
         case AF_INET6: {
                         struct in6_pktinfo *pki = CMSG_DATA(cmh);
+                        struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp);
 
                         cmh->cmsg_level = SOL_IPV6;
                         cmh->cmsg_type = IPV6_PKTINFO;
-                        pki->ipi6_ifindex = 0;
-                        ipv6_addr_copy(&pki->ipi6_addr,
-                                        &rqstp->rq_daddr.addr6);
+                        pki->ipi6_ifindex = daddr->sin6_scope_id;
+                        ipv6_addr_copy(&pki->ipi6_addr, &daddr->sin6_addr);
                         cmh->cmsg_len = CMSG_LEN(sizeof(*pki));
                 }
                 break;
@@ -498,9 +499,13 @@ static int svc_udp_get_dest_address4(struct svc_rqst *rqstp,
                                      struct cmsghdr *cmh)
 {
         struct in_pktinfo *pki = CMSG_DATA(cmh);
+        struct sockaddr_in *daddr = svc_daddr_in(rqstp);
+
         if (cmh->cmsg_type != IP_PKTINFO)
                 return 0;
-        rqstp->rq_daddr.addr.s_addr = pki->ipi_spec_dst.s_addr;
+
+        daddr->sin_family = AF_INET;
+        daddr->sin_addr.s_addr = pki->ipi_spec_dst.s_addr;
         return 1;
 }
 
@@ -511,9 +516,14 @@ static int svc_udp_get_dest_address6(struct svc_rqst *rqstp,
                                      struct cmsghdr *cmh)
 {
         struct in6_pktinfo *pki = CMSG_DATA(cmh);
+        struct sockaddr_in6 *daddr = svc_daddr_in6(rqstp);
+
         if (cmh->cmsg_type != IPV6_PKTINFO)
                 return 0;
-        ipv6_addr_copy(&rqstp->rq_daddr.addr6, &pki->ipi6_addr);
+
+        daddr->sin6_family = AF_INET6;
+        ipv6_addr_copy(&daddr->sin6_addr, &pki->ipi6_addr);
+        daddr->sin6_scope_id = pki->ipi6_ifindex;
         return 1;
 }
 
@@ -614,6 +624,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp)
                 skb_free_datagram_locked(svsk->sk_sk, skb);
                 return 0;
         }
+        rqstp->rq_daddrlen = svc_addr_len(svc_daddr(rqstp));
 
         if (skb_is_nonlinear(skb)) {
                 /* we have to copy */