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authorBob Sharp <bsharp@neteffect.com>2008-10-03 12:21:19 -0700
committerRoland Dreier <rolandd@cisco.com>2008-10-03 12:21:19 -0700
commit7191a0a18228c8da9abc7776433c6a3953ff1e4b (patch)
treec7c103a900a033242fd0cfda4b7e1100428234cf /drivers/infiniband
parent7e36d3d732438de894802f87a0ca21372e00fb74 (diff)
RDMA/nes: Fix routed RDMA connections
Fix routed RDMA connections to destinations where the next hop is not the final destination. Use neigh_*() to properly locate neighbor. Signed-off-by: Bob Sharp <bsharp@neteffect.com> Signed-off-by: Sweta Bhatt <sweta.bhatt@einfochips.com> Signed-off-by: Chien Tung <ctung@neteffect.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/nes/nes_cm.c38
1 files changed, 30 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 08f2b3e80fcb..d69226d7102e 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -52,7 +52,7 @@
#include <linux/random.h>
#include <linux/list.h>
#include <linux/threads.h>
-
+#include <net/arp.h>
#include <net/neighbour.h>
#include <net/route.h>
#include <net/ip_fib.h>
@@ -1019,23 +1019,43 @@ static inline int mini_cm_accelerated(struct nes_cm_core *cm_core,
/**
- * nes_addr_send_arp
+ * nes_addr_resolve_neigh
*/
-static void nes_addr_send_arp(u32 dst_ip)
+static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip)
{
struct rtable *rt;
struct flowi fl;
+ struct neighbour *neigh;
+ int rc = -1;
+ DECLARE_MAC_BUF(mac);
memset(&fl, 0, sizeof fl);
fl.nl_u.ip4_u.daddr = htonl(dst_ip);
if (ip_route_output_key(&init_net, &rt, &fl)) {
printk("%s: ip_route_output_key failed for 0x%08X\n",
__func__, dst_ip);
- return;
+ return rc;
+ }
+
+ neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, nesvnic->netdev);
+ if (neigh) {
+ if (neigh->nud_state & NUD_VALID) {
+ nes_debug(NES_DBG_CM, "Neighbor MAC address for 0x%08X"
+ " is %s, Gateway is 0x%08X \n", dst_ip,
+ print_mac(mac, neigh->ha), ntohl(rt->rt_gateway));
+ nes_manage_arp_cache(nesvnic->netdev, neigh->ha,
+ dst_ip, NES_ARP_ADD);
+ rc = nes_arp_table(nesvnic->nesdev, dst_ip, NULL,
+ NES_ARP_RESOLVE);
+ }
+ neigh_release(neigh);
}
- neigh_event_send(rt->u.dst.neighbour, NULL);
+ if ((neigh == NULL) || (!(neigh->nud_state & NUD_VALID)))
+ neigh_event_send(rt->u.dst.neighbour, NULL);
+
ip_rt_put(rt);
+ return rc;
}
@@ -1108,9 +1128,11 @@ static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
/* get the mac addr for the remote node */
arpindex = nes_arp_table(nesdev, cm_node->rem_addr, NULL, NES_ARP_RESOLVE);
if (arpindex < 0) {
- kfree(cm_node);
- nes_addr_send_arp(cm_info->rem_addr);
- return NULL;
+ arpindex = nes_addr_resolve_neigh(nesvnic, cm_info->rem_addr);
+ if (arpindex < 0) {
+ kfree(cm_node);
+ return NULL;
+ }
}
/* copy the mac addr to node context */