From 5b0ec991c0576c54db75803fbcb0ef5bebfa0828 Mon Sep 17 00:00:00 2001 From: Sean Hefty Date: Thu, 14 Jun 2012 20:31:39 +0000 Subject: [PATCH] RDMA/cma: Bind to a specific address family The RDMA CM uses a single port space for all associated (tcp, udp, etc.) port bindings, regardless of the address family that the user binds to. The result is that if a user binds to AF_INET, but does not specify an IP address, the bind will occur for AF_INET6. This causes an attempt to bind to the same port using AF_INET6 to fail, and connection requests to AF_INET6 will match with the AF_INET listener. Align the behavior with sockets and restrict the bind to AF_INET only. If a user binds to AF_INET6, we bind the port to AF_INET6 and AF_INET depending on the value of bindv6only. Signed-off-by: Sean Hefty Signed-off-by: Roland Dreier --- drivers/infiniband/core/cma.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 2e826f9702c6..c10c45a07162 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -140,6 +140,7 @@ struct rdma_id_private { u8 srq; u8 tos; u8 reuseaddr; + u8 afonly; }; struct cma_multicast { @@ -1573,6 +1574,7 @@ static void cma_listen_on_dev(struct rdma_id_private *id_priv, list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list); atomic_inc(&id_priv->refcount); dev_id_priv->internal_id = 1; + dev_id_priv->afonly = id_priv->afonly; ret = rdma_listen(id, id_priv->backlog); if (ret) @@ -2187,22 +2189,24 @@ static int cma_check_port(struct rdma_bind_list *bind_list, struct hlist_node *node; addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr; - if (cma_any_addr(addr) && !reuseaddr) - return -EADDRNOTAVAIL; - hlist_for_each_entry(cur_id, node, &bind_list->owners, node) { if (id_priv == cur_id) continue; - if ((cur_id->state == RDMA_CM_LISTEN) || - !reuseaddr || !cur_id->reuseaddr) { - cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; - if (cma_any_addr(cur_addr)) - return -EADDRNOTAVAIL; + if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr && + cur_id->reuseaddr) + continue; - if (!cma_addr_cmp(addr, cur_addr)) - return -EADDRINUSE; - } + cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr; + if (id_priv->afonly && cur_id->afonly && + (addr->sa_family != cur_addr->sa_family)) + continue; + + if (cma_any_addr(addr) || cma_any_addr(cur_addr)) + return -EADDRNOTAVAIL; + + if (!cma_addr_cmp(addr, cur_addr)) + return -EADDRINUSE; } return 0; } @@ -2371,6 +2375,12 @@ int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr) } memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr)); + if (addr->sa_family == AF_INET) + id_priv->afonly = 1; +#if IS_ENABLED(CONFIG_IPV6) + else if (addr->sa_family == AF_INET6) + id_priv->afonly = init_net.ipv6.sysctl.bindv6only; +#endif ret = cma_get_port(id_priv); if (ret) goto err2; -- 2.20.1