diff options
Diffstat (limited to 'net/smc/smc_ib.c')
| -rw-r--r-- | net/smc/smc_ib.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c index a8845343d183..9f72910af1d0 100644 --- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -183,6 +183,33 @@ bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport) return smcibdev->pattr[ibport - 1].state == IB_PORT_ACTIVE; } +int smc_ib_find_route(__be32 saddr, __be32 daddr, + u8 nexthop_mac[], u8 *uses_gateway) +{ + struct neighbour *neigh = NULL; + struct rtable *rt = NULL; + struct flowi4 fl4 = { + .saddr = saddr, + .daddr = daddr + }; + + if (daddr == cpu_to_be32(INADDR_NONE)) + goto out; + rt = ip_route_output_flow(&init_net, &fl4, NULL); + if (IS_ERR(rt)) + goto out; + if (rt->rt_uses_gateway && rt->rt_gw_family != AF_INET) + goto out; + neigh = rt->dst.ops->neigh_lookup(&rt->dst, NULL, &fl4.daddr); + if (neigh) { + memcpy(nexthop_mac, neigh->ha, ETH_ALEN); + *uses_gateway = rt->rt_uses_gateway; + return 0; + } +out: + return -ENOENT; +} + /* determine the gid for an ib-device port and vlan id */ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, unsigned short vlan_id, u8 gid[], u8 *sgid_index) |