qeth: Move away from using neighbour entries in qeth_l3_fill_header()

We've moving to a model where dst_entry objects to not have
a reference to the associated neighbour entry, instead such
neighbours must be looked up on-demand.

Here in qeth_l3_fill_header() it's actually much simpler to
use the information in the route itself.  The code is
already conditionalized upon protocol type.

Signed-off-by: David S. Miller <davem@davemloft.net>
Tested-by: Ursula Braun <ubraun@linux.vnet.ibm.com>

diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 9648e4e68337d35a05fd12cf997d27411033d493..25cd3799a76c0824871661afd98599101bf6733d 100644 (file)
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -28,6 +28,8 @@
 
 #include <net/ip.h>
 #include <net/arp.h>
+#include <net/route.h>
+#include <net/ip6_fib.h>
 #include <net/ip6_checksum.h>
 #include <net/iucv/af_iucv.h>
 
@@ -2832,7 +2834,6 @@ static void qeth_l3_fill_af_iucv_hdr(struct qeth_card *card,
 static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
                struct sk_buff *skb, int ipv, int cast_type)
 {
-       struct neighbour *n = NULL;
        struct dst_entry *dst;
 
        memset(hdr, 0, sizeof(struct qeth_hdr));
@@ -2855,33 +2856,29 @@ static void qeth_l3_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 
        rcu_read_lock();
        dst = skb_dst(skb);
-       if (dst)
-               n = dst_get_neighbour_noref(dst);
        if (ipv == 4) {
+               struct rtable *rt = (struct rtable *) dst;
+               __be32 *pkey = &ip_hdr(skb)->daddr;
+
+               if (rt->rt_gateway)
+                       pkey = &rt->rt_gateway;
+
                /* IPv4 */
                hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags4(cast_type);
                memset(hdr->hdr.l3.dest_addr, 0, 12);
-               if (n) {
-                       *((u32 *) (&hdr->hdr.l3.dest_addr[12])) =
-                           *((u32 *) n->primary_key);
-               } else {
-                       /* fill in destination address used in ip header */
-                       *((u32 *) (&hdr->hdr.l3.dest_addr[12])) =
-                                                       ip_hdr(skb)->daddr;
-               }
+               *((__be32 *) (&hdr->hdr.l3.dest_addr[12])) = *pkey;
        } else if (ipv == 6) {
+               struct rt6_info *rt = (struct rt6_info *) dst;
+               struct in6_addr *pkey = &ipv6_hdr(skb)->daddr;
+
+               if (!ipv6_addr_any(&rt->rt6i_gateway))
+                       pkey = &rt->rt6i_gateway;
+
                /* IPv6 */
                hdr->hdr.l3.flags = qeth_l3_get_qeth_hdr_flags6(cast_type);
                if (card->info.type == QETH_CARD_TYPE_IQD)
                        hdr->hdr.l3.flags &= ~QETH_HDR_PASSTHRU;
-               if (n) {
-                       memcpy(hdr->hdr.l3.dest_addr,
-                              n->primary_key, 16);
-               } else {
-                       /* fill in destination address used in ip header */
-                       memcpy(hdr->hdr.l3.dest_addr,
-                              &ipv6_hdr(skb)->daddr, 16);
-               }
+               memcpy(hdr->hdr.l3.dest_addr, pkey, 16);
        } else {
                /* passthrough */
                if ((skb->dev->type == ARPHRD_IEEE802_TR) &&