diff options
| author | Bob Sharp <bsharp@neteffect.com> | 2008-10-03 12:21:19 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-10-03 12:21:19 -0700 |
| commit | 7191a0a18228c8da9abc7776433c6a3953ff1e4b (patch) | |
| tree | c7c103a900a033242fd0cfda4b7e1100428234cf /drivers/infiniband | |
| parent | 7e36d3d732438de894802f87a0ca21372e00fb74 (diff) | |
| download | linux-7191a0a18228c8da9abc7776433c6a3953ff1e4b.tar.bz2 | |
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.c | 38 |
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 */ |