diff options
| author |   Karsten Graul <kgraul@linux.ibm.com> | 2021-10-16 11:37:45 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-10-16 14:58:12 +0100 |
| commit | e5c4744cfb598f98672f8d21d59ef2c1fa9c9b5f (patch) | |
| tree | 30edacc4d9bf361c7d07f78205517a9e90af3b61 /net/smc/smc_ib.c | |
| parent | net/smc: prepare for SMC-Rv2 connection (diff) | |
| download | linux-dev-e5c4744cfb598f98672f8d21d59ef2c1fa9c9b5f.tar.xz linux-dev-e5c4744cfb598f98672f8d21d59ef2c1fa9c9b5f.zip | |
net/smc: add SMC-Rv2 connection establishment
Send a CLC proposal message, and the remote side process this type of
message and determine the target GID. Check for a valid route to this
GID, and complete the connection establishment.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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) |