diff options
| author | Mark Zhang <markz@mellanox.com> | 2020-05-04 08:19:34 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-05-06 16:51:44 -0300 |
| commit | f66534051936044728e2be9937eb408494ca4007 (patch) | |
| tree | f5b17a2882ee81be10597e97d300d66cd0a20a35 /drivers/infiniband/core/cma.c | |
| parent | 2b880b2e5e03e790a9b9fd7e3e8fcf7a36230a16 (diff) | |
| download | linux-f66534051936044728e2be9937eb408494ca4007.tar.bz2 | |
RDMA/cma: Initialize the flow label of CM's route path record
If flow label is not set by the user or it's not IPv4, initialize it with
the cma src/dst based on the "Kernighan and Ritchie's hash function".
Link: https://lore.kernel.org/r/20200504051935.269708-5-leon@kernel.org
Signed-off-by: Mark Zhang <markz@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/cma.c')
| -rw-r--r-- | drivers/infiniband/core/cma.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index e8d99b71f44a..432eec472164 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -2909,6 +2909,24 @@ static int iboe_tos_to_sl(struct net_device *ndev, int tos) return 0; } +static __be32 cma_get_roce_udp_flow_label(struct rdma_id_private *id_priv) +{ + struct sockaddr_in6 *addr6; + u16 dport, sport; + u32 hash, fl; + + addr6 = (struct sockaddr_in6 *)cma_src_addr(id_priv); + fl = be32_to_cpu(addr6->sin6_flowinfo) & IB_GRH_FLOWLABEL_MASK; + if ((cma_family(id_priv) != AF_INET6) || !fl) { + dport = be16_to_cpu(cma_port(cma_dst_addr(id_priv))); + sport = be16_to_cpu(cma_port(cma_src_addr(id_priv))); + hash = (u32)sport * 31 + dport; + fl = hash & IB_GRH_FLOWLABEL_MASK; + } + + return cpu_to_be32(fl); +} + static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) { struct rdma_route *route = &id_priv->id.route; @@ -2975,6 +2993,11 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv) goto err2; } + if (rdma_protocol_roce_udp_encap(id_priv->id.device, + id_priv->id.port_num)) + route->path_rec->flow_label = + cma_get_roce_udp_flow_label(id_priv); + cma_init_resolve_route_work(work, id_priv); queue_work(cma_wq, &work->work); |