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IB/core: Use hop-limit from IP stack for RoCE
Previously, IPV6_DEFAULT_HOPLIMIT was used as the hop limit value for RoCE. Fixing that by taking ip4_dst_hoplimit and ip6_dst_hoplimit as hop limit values. Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -252,6 +252,8 @@ static int addr4_resolve(struct sockaddr_in *src_in,
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if (rt->rt_uses_gateway)
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addr->network = RDMA_NETWORK_IPV4;
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addr->hoplimit = ip4_dst_hoplimit(&rt->dst);
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*prt = rt;
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return 0;
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out:
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@ -295,6 +297,8 @@ static int addr6_resolve(struct sockaddr_in6 *src_in,
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if (rt->rt6i_flags & RTF_GATEWAY)
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addr->network = RDMA_NETWORK_IPV6;
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addr->hoplimit = ip6_dst_hoplimit(dst);
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*pdst = dst;
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return 0;
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put:
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@ -543,7 +547,8 @@ static void resolve_cb(int status, struct sockaddr *src_addr,
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int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
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const union ib_gid *dgid,
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u8 *dmac, u16 *vlan_id, int *if_index)
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u8 *dmac, u16 *vlan_id, int *if_index,
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int *hoplimit)
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{
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int ret = 0;
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struct rdma_dev_addr dev_addr;
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@ -582,6 +587,8 @@ int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
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*if_index = dev_addr.bound_dev_if;
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if (vlan_id)
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*vlan_id = rdma_vlan_dev_vlan_id(dev);
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if (hoplimit)
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*hoplimit = dev_addr.hoplimit;
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dev_put(dev);
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return ret;
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}
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@ -1641,6 +1641,7 @@ static int cm_req_handler(struct cm_work *work)
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cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1]);
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memcpy(work->path[0].dmac, cm_id_priv->av.ah_attr.dmac, ETH_ALEN);
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work->path[0].hop_limit = cm_id_priv->av.ah_attr.grh.hop_limit;
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ret = ib_get_cached_gid(work->port->cm_dev->ib_device,
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work->port->port_num,
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cm_id_priv->av.ah_attr.grh.sgid_index,
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@ -2424,7 +2424,6 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
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{
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struct rdma_route *route = &id_priv->id.route;
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struct rdma_addr *addr = &route->addr;
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enum ib_gid_type network_gid_type;
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struct cma_work *work;
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int ret;
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struct net_device *ndev = NULL;
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@ -2478,14 +2477,13 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
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&route->path_rec->dgid);
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/* Use the hint from IP Stack to select GID Type */
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network_gid_type = ib_network_to_gid_type(addr->dev_addr.network);
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if (addr->dev_addr.network != RDMA_NETWORK_IB) {
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route->path_rec->gid_type = network_gid_type;
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if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
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route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
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if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
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/* TODO: get the hoplimit from the inet/inet6 device */
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route->path_rec->hop_limit = IPV6_DEFAULT_HOPLIMIT;
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} else {
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route->path_rec->hop_limit = addr->dev_addr.hoplimit;
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else
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route->path_rec->hop_limit = 1;
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}
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route->path_rec->reversible = 1;
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route->path_rec->pkey = cpu_to_be16(0xffff);
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route->path_rec->mtu_selector = IB_SA_EQ;
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@ -434,6 +434,7 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
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int ret;
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enum rdma_network_type net_type = RDMA_NETWORK_IB;
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enum ib_gid_type gid_type = IB_GID_TYPE_IB;
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int hoplimit = 0xff;
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union ib_gid dgid;
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union ib_gid sgid;
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@ -471,7 +472,7 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
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ah_attr->dmac,
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wc->wc_flags & IB_WC_WITH_VLAN ?
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NULL : &vlan_id,
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&if_index);
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&if_index, &hoplimit);
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if (ret) {
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dev_put(idev);
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return ret;
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@ -520,7 +521,7 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
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ah_attr->grh.sgid_index = (u8) gid_index;
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flow_class = be32_to_cpu(grh->version_tclass_flow);
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ah_attr->grh.flow_label = flow_class & 0xFFFFF;
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ah_attr->grh.hop_limit = 0xFF;
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ah_attr->grh.hop_limit = hoplimit;
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ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
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}
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return 0;
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@ -1138,6 +1139,7 @@ int ib_resolve_eth_dmac(struct ib_qp *qp,
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union ib_gid sgid;
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struct ib_gid_attr sgid_attr;
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int ifindex;
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int hop_limit;
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ret = ib_query_gid(qp->device,
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qp_attr->ah_attr.port_num,
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@ -1149,21 +1151,17 @@ int ib_resolve_eth_dmac(struct ib_qp *qp,
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ret = -ENXIO;
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goto out;
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}
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if (sgid_attr.gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
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/* TODO: get the hoplimit from the inet/inet6
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* device
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*/
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qp_attr->ah_attr.grh.hop_limit =
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IPV6_DEFAULT_HOPLIMIT;
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ifindex = sgid_attr.ndev->ifindex;
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ret = rdma_addr_find_l2_eth_by_grh(&sgid,
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&qp_attr->ah_attr.grh.dgid,
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qp_attr->ah_attr.dmac,
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NULL, &ifindex);
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NULL, &ifindex, &hop_limit);
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dev_put(sgid_attr.ndev);
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qp_attr->ah_attr.grh.hop_limit = hop_limit;
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}
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}
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out:
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@ -154,7 +154,8 @@ struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
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(!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
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status = rdma_addr_find_l2_eth_by_grh(&sgid, &attr->grh.dgid,
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attr->dmac, &vlan_tag,
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&sgid_attr.ndev->ifindex);
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&sgid_attr.ndev->ifindex,
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NULL);
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if (status) {
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pr_err("%s(): Failed to resolve dmac from gid."
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"status = %d\n", __func__, status);
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@ -84,6 +84,7 @@ struct rdma_dev_addr {
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enum rdma_transport_type transport;
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struct net *net;
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enum rdma_network_type network;
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int hoplimit;
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};
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/**
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@ -132,7 +133,8 @@ int rdma_addr_size(struct sockaddr *addr);
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int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
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int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
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const union ib_gid *dgid,
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u8 *smac, u16 *vlan_id, int *if_index);
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u8 *smac, u16 *vlan_id, int *if_index,
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int *hoplimit);
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static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
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{
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