IB/core: Refactor ib_init_ah_attr_from_path() for RoCE
Resolving route for RoCE for a path record is needed only for the received CM requests. Therefore, (a) ib_init_ah_attr_from_path() is refactored first to isolate the code of resolving route. (b) Setting dlid, path bits is not needed for RoCE. Additionally ah attribute initialization is done from the path record entry, so it is better to refer to path record entry type for different link layer instead of ah attribute type while initializing ah attribute itself. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit
Jason Gunthorpe
parent
a22af59ea9
commit
0a51415935
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@ -1227,118 +1227,125 @@ static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
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return src_path_mask;
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}
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static int
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roce_resolve_route_from_path(struct ib_device *device, u8 port_num,
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struct sa_path_rec *rec)
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{
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struct net_device *resolved_dev;
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struct net_device *ndev;
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struct net_device *idev;
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struct rdma_dev_addr dev_addr = {
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.bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
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sa_path_get_ifindex(rec) : 0),
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.net = sa_path_get_ndev(rec) ?
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sa_path_get_ndev(rec) :
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&init_net
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};
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union {
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struct sockaddr _sockaddr;
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struct sockaddr_in _sockaddr_in;
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struct sockaddr_in6 _sockaddr_in6;
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} sgid_addr, dgid_addr;
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int ret;
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if (!device->get_netdev)
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return -EOPNOTSUPP;
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rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
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rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
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/* validate the route */
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ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
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&dgid_addr._sockaddr, &dev_addr);
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if (ret)
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return ret;
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if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
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dev_addr.network == RDMA_NETWORK_IPV6) &&
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rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
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return -EINVAL;
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idev = device->get_netdev(device, port_num);
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if (!idev)
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return -ENODEV;
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resolved_dev = dev_get_by_index(dev_addr.net,
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dev_addr.bound_dev_if);
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if (!resolved_dev) {
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ret = -ENODEV;
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goto done;
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}
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ndev = ib_get_ndev_from_path(rec);
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rcu_read_lock();
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if ((ndev && ndev != resolved_dev) ||
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(resolved_dev != idev &&
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!rdma_is_upper_dev_rcu(idev, resolved_dev)))
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ret = -EHOSTUNREACH;
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rcu_read_unlock();
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dev_put(resolved_dev);
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if (ndev)
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dev_put(ndev);
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done:
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dev_put(idev);
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return ret;
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}
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static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
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struct sa_path_rec *rec,
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struct rdma_ah_attr *ah_attr)
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{
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enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
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struct net_device *ndev;
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u16 gid_index;
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int ret;
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ndev = ib_get_ndev_from_path(rec);
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ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
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port_num, ndev, &gid_index);
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if (ndev)
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dev_put(ndev);
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if (ret)
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return ret;
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rdma_ah_set_grh(ah_attr, &rec->dgid,
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be32_to_cpu(rec->flow_label),
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gid_index, rec->hop_limit,
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rec->traffic_class);
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return 0;
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}
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int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
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struct sa_path_rec *rec,
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struct rdma_ah_attr *ah_attr)
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{
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int ret;
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u16 gid_index;
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int use_roce;
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struct net_device *ndev = NULL;
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int ret = 0;
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memset(ah_attr, 0, sizeof *ah_attr);
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memset(ah_attr, 0, sizeof(*ah_attr));
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ah_attr->type = rdma_ah_find_type(device, port_num);
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rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
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if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
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(rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)))
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rdma_ah_set_make_grd(ah_attr, true);
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rdma_ah_set_sl(ah_attr, rec->sl);
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rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) &
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get_src_path_mask(device, port_num));
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rdma_ah_set_port_num(ah_attr, port_num);
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rdma_ah_set_static_rate(ah_attr, rec->rate);
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use_roce = rdma_cap_eth_ah(device, port_num);
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if (use_roce) {
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struct net_device *idev;
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struct net_device *resolved_dev;
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struct rdma_dev_addr dev_addr = {
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.bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
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sa_path_get_ifindex(rec) : 0),
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.net = sa_path_get_ndev(rec) ?
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sa_path_get_ndev(rec) :
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&init_net
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};
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union {
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struct sockaddr _sockaddr;
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struct sockaddr_in _sockaddr_in;
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struct sockaddr_in6 _sockaddr_in6;
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} sgid_addr, dgid_addr;
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if (!device->get_netdev)
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return -EOPNOTSUPP;
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rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
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rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
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/* validate the route */
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ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
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&dgid_addr._sockaddr, &dev_addr);
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if (sa_path_is_roce(rec)) {
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ret = roce_resolve_route_from_path(device, port_num, rec);
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if (ret)
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return ret;
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if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
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dev_addr.network == RDMA_NETWORK_IPV6) &&
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rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
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return -EINVAL;
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memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
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} else {
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rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
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if (sa_path_is_opa(rec) &&
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rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
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rdma_ah_set_make_grd(ah_attr, true);
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idev = device->get_netdev(device, port_num);
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if (!idev)
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return -ENODEV;
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resolved_dev = dev_get_by_index(dev_addr.net,
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dev_addr.bound_dev_if);
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if (!resolved_dev) {
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dev_put(idev);
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return -ENODEV;
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}
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ndev = ib_get_ndev_from_path(rec);
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rcu_read_lock();
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if ((ndev && ndev != resolved_dev) ||
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(resolved_dev != idev &&
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!rdma_is_upper_dev_rcu(idev, resolved_dev)))
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ret = -EHOSTUNREACH;
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rcu_read_unlock();
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dev_put(idev);
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dev_put(resolved_dev);
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if (ret) {
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if (ndev)
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dev_put(ndev);
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return ret;
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}
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rdma_ah_set_path_bits(ah_attr,
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be32_to_cpu(sa_path_get_slid(rec)) &
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get_src_path_mask(device, port_num));
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}
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if (rec->hop_limit > 0 || use_roce) {
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enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
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ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
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port_num, ndev, &gid_index);
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if (ret) {
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if (ndev)
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dev_put(ndev);
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return ret;
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}
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rdma_ah_set_grh(ah_attr, &rec->dgid,
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be32_to_cpu(rec->flow_label),
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gid_index, rec->hop_limit,
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rec->traffic_class);
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if (ndev)
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dev_put(ndev);
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}
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if (use_roce) {
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u8 *dmac = sa_path_get_dmac(rec);
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if (!dmac)
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return -EINVAL;
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memcpy(ah_attr->roce.dmac, dmac, ETH_ALEN);
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}
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return 0;
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if (rec->hop_limit > 0 || sa_path_is_roce(rec))
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ret = init_ah_attr_grh_fields(device, port_num, rec, ah_attr);
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return ret;
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}
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EXPORT_SYMBOL(ib_init_ah_attr_from_path);
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@ -590,6 +590,11 @@ static inline bool sa_path_is_roce(struct sa_path_rec *rec)
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(rec->rec_type == SA_PATH_REC_TYPE_ROCE_V2));
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}
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static inline bool sa_path_is_opa(struct sa_path_rec *rec)
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{
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return (rec->rec_type == SA_PATH_REC_TYPE_OPA);
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}
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static inline void sa_path_set_slid(struct sa_path_rec *rec, u32 slid)
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{
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if (rec->rec_type == SA_PATH_REC_TYPE_IB)
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