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authorJulian Wiedmann <jwi@linux.ibm.com>2020-05-06 10:09:43 +0200
committerDavid S. Miller <davem@davemloft.net>2020-05-06 14:11:26 -0700
commit1d38c2e4941e1add2a89ef7abb22c918bbb3c103 (patch)
treedde00248d98b5315b5618ac6bdbe04d5fb0f7db7 /drivers/s390
parentfb8d258049f70e6bfd4674b11deb566fb13a0839 (diff)
s390/qeth: extract helpers for next-hop lookup
These will be used in a subsequent patch. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_core.h29
-rw-r--r--drivers/s390/net/qeth_l3_main.c18
2 files changed, 27 insertions, 20 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index 3d8b8e0f2438..6b0d37d2c638 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -34,6 +34,7 @@
#include <net/ipv6.h>
#include <net/if_inet6.h>
#include <net/addrconf.h>
+#include <net/route.h>
#include <net/sch_generic.h>
#include <net/tcp.h>
@@ -234,11 +235,7 @@ struct qeth_hdr_layer3 {
__u16 frame_offset;
union {
/* TX: */
- struct in6_addr ipv6_addr;
- struct ipv4 {
- u8 res[12];
- u32 addr;
- } ipv4;
+ struct in6_addr addr;
/* RX: */
struct rx {
u8 res1[2];
@@ -355,8 +352,7 @@ static inline bool qeth_l3_same_next_hop(struct qeth_hdr_layer3 *h1,
struct qeth_hdr_layer3 *h2)
{
return !((h1->flags ^ h2->flags) & QETH_HDR_IPV6) &&
- ipv6_addr_equal(&h1->next_hop.ipv6_addr,
- &h2->next_hop.ipv6_addr);
+ ipv6_addr_equal(&h1->next_hop.addr, &h2->next_hop.addr);
}
struct qeth_local_addr {
@@ -945,6 +941,25 @@ static inline struct dst_entry *qeth_dst_check_rcu(struct sk_buff *skb, int ipv)
return dst;
}
+static inline __be32 qeth_next_hop_v4_rcu(struct sk_buff *skb,
+ struct dst_entry *dst)
+{
+ struct rtable *rt = (struct rtable *) dst;
+
+ return (rt) ? rt_nexthop(rt, ip_hdr(skb)->daddr) : ip_hdr(skb)->daddr;
+}
+
+static inline struct in6_addr *qeth_next_hop_v6_rcu(struct sk_buff *skb,
+ struct dst_entry *dst)
+{
+ struct rt6_info *rt = (struct rt6_info *) dst;
+
+ if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
+ return &rt->rt6i_gateway;
+ else
+ return &ipv6_hdr(skb)->daddr;
+}
+
static inline void qeth_tx_csum(struct sk_buff *skb, u8 *flags, int ipv)
{
*flags |= QETH_HDR_EXT_CSUM_TRANSP_REQ;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index fec4ac41e946..1e50aa0297a3 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1694,8 +1694,8 @@ static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
if (skb->protocol == htons(ETH_P_AF_IUCV)) {
l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
- l3_hdr->next_hop.ipv6_addr.s6_addr16[0] = htons(0xfe80);
- memcpy(&l3_hdr->next_hop.ipv6_addr.s6_addr32[2],
+ l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
+ memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
iucv_trans_hdr(skb)->destUserID, 8);
return;
}
@@ -1729,18 +1729,10 @@ static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
if (ipv == 4) {
- struct rtable *rt = (struct rtable *) dst;
-
- *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
- rt_nexthop(rt, ip_hdr(skb)->daddr) :
- ip_hdr(skb)->daddr;
+ l3_hdr->next_hop.addr.s6_addr32[3] =
+ qeth_next_hop_v4_rcu(skb, dst);
} else if (ipv == 6) {
- struct rt6_info *rt = (struct rt6_info *) dst;
-
- if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
- l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway;
- else
- l3_hdr->next_hop.ipv6_addr = ipv6_hdr(skb)->daddr;
+ l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
hdr->hdr.l3.flags |= QETH_HDR_IPV6;
if (!IS_IQD(card))

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