From be1d325a335840a86c133a56c6a911c368bac0fd Mon Sep 17 00:00:00 2001 From: Noa Osherovich Date: Mon, 12 Jun 2017 11:14:03 +0300 Subject: [PATCH] IB/core: Set RoCEv2 MGID according to spec RoCEv2 Annex states that for RoCEv2 over IPv4, the corresponding IPv4 address is encoded into the GID according to the following rule: GID= :ffff: Remove the 0xff0e prefix for RoCEv2 packets with IPv4 and leave it zeroed and change rdma_is_multicast_addr() to consider the new logic. Signed-off-by: Noa Osherovich Reviewed-by: Moni Shoua Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/core/cma.c | 13 +++++++------ drivers/infiniband/core/verbs.c | 10 ++++++---- include/rdma/ib_addr.h | 8 +++++++- 3 files changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 0eb393237ba2..a8c2f0ccd225 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -3998,7 +3998,8 @@ static void iboe_mcast_work_handler(struct work_struct *work) kfree(mw); } -static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) +static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid, + enum ib_gid_type gid_type) { struct sockaddr_in *sin = (struct sockaddr_in *)addr; struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; @@ -4008,8 +4009,8 @@ static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid) } else if (addr->sa_family == AF_INET6) { memcpy(mgid, &sin6->sin6_addr, sizeof *mgid); } else { - mgid->raw[0] = 0xff; - mgid->raw[1] = 0x0e; + mgid->raw[0] = (gid_type == IB_GID_TYPE_IB) ? 0xff : 0; + mgid->raw[1] = (gid_type == IB_GID_TYPE_IB) ? 0x0e : 0; mgid->raw[2] = 0; mgid->raw[3] = 0; mgid->raw[4] = 0; @@ -4050,7 +4051,9 @@ static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, goto out1; } - cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid); + gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num - + rdma_start_port(id_priv->cma_dev->device)]; + cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type); mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff); if (id_priv->id.ps == RDMA_PS_UDP) @@ -4066,8 +4069,6 @@ static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, mc->multicast.ib->rec.hop_limit = 1; mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu); - gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num - - rdma_start_port(id_priv->cma_dev->device)]; if (addr->sa_family == AF_INET) { if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) { mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT; diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 802bdc397a57..30fdc3ae1bbd 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -1613,8 +1613,9 @@ int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) if (!qp->device->attach_mcast) return -ENOSYS; - if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || - !is_valid_mcast_lid(qp, lid)) + + if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || + qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) return -EINVAL; ret = qp->device->attach_mcast(qp, gid, lid); @@ -1630,8 +1631,9 @@ int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid) if (!qp->device->detach_mcast) return -ENOSYS; - if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD || - !is_valid_mcast_lid(qp, lid)) + + if (!rdma_is_multicast_addr((struct in6_addr *)gid->raw) || + qp->qp_type != IB_QPT_UD || !is_valid_mcast_lid(qp, lid)) return -EINVAL; ret = qp->device->detach_mcast(qp, gid, lid); diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h index b73a14edc85e..7aca12188ef3 100644 --- a/include/rdma/ib_addr.h +++ b/include/rdma/ib_addr.h @@ -304,7 +304,13 @@ static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) static inline int rdma_is_multicast_addr(struct in6_addr *addr) { - return addr->s6_addr[0] == 0xff; + u32 ipv4_addr; + + if (addr->s6_addr[0] == 0xff) + return 1; + + memcpy(&ipv4_addr, addr->s6_addr + 12, 4); + return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr)); } static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) -- 2.30.2