From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-170.mta0.migadu.com (out-170.mta0.migadu.com [91.218.175.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB9C51E505 for ; Sun, 8 Mar 2026 23:36:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773012983; cv=none; b=fepY0++E+t7ty7hZKiQ6YfxGOWd7/r01CrVZMc7K2mqg9Xv6vRwiGyVWlh4D0KlXbK5EdC8XfAQSUPez8fv5piMLJUk8jWQ3w0b7VPtgpNC1g+JAdbQG98NrC30QOULdRE2JNeIxOIwJbmlPjaQqAtkEuWmtCdFRQkobxKj0uq0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773012983; c=relaxed/simple; bh=hB4IHvJ9Wm4ZB3ykrHdXchLTbkWki6upsWKVjC1QT/U=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RUbfSmRTKsLzMuvRQWn3+wMqNZAealfmf+9wZXXgJpQgRtWO+GDA/qjiB+Lfp+wLBciFhm7kKC//5PkVK/IfyJJ3u7EO75/0K0uIWBmZHcbo+RSBfElkdbQvMXcKswz4mS3KwFo9GCW03W7YNei5gdUrsjdBRHKbe/09YVsVNNs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=tE06By4v; arc=none smtp.client-ip=91.218.175.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="tE06By4v" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1773012980; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ko1/vnir2xikyvM6wJpSNzKHQ7itVLf7UOHMyZdLMaw=; b=tE06By4vhApadI0Xm1YsjzTOARVMu0z2GTk98vBmq7Kk0CppECHxGO+t/JgHfDSO81EvwC qI+Uq8C2AE8d9u4+Axf/43rQ6/4v9SYxNxLfb4qIy0YkO32FasPqwDx9AQL/PRVCz/d2rB wpHe2XSUGKJC9lIEhAbFdKlYT7imoHg= From: Zhu Yanjun To: jgg@ziepe.ca, leon@kernel.org, zyjzyj2000@gmail.com, yanjun.zhu@linux.dev, dsahern@kernel.org, linux-rdma@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v4 2/4] RDMA/rxe: Add net namespace support for IPv4/IPv6 sockets Date: Sun, 8 Mar 2026 16:35:38 -0700 Message-ID: <20260308233540.13382-3-yanjun.zhu@linux.dev> In-Reply-To: <20260308233540.13382-1-yanjun.zhu@linux.dev> References: <20260308233540.13382-1-yanjun.zhu@linux.dev> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Add a net namespace implementation file to rxe to manage the lifecycle of IPv4 and IPv6 sockets per network namespace. This implementation handles the creation and destruction of the sockets both for init_net and for dynamically created network namespaces. The sockets are initialized when a namespace becomes active and are properly released when the namespace is removed. This change provides the infrastructure needed for rxe to operate correctly in environments using multiple network namespaces. Signed-off-by: Zhu Yanjun --- drivers/infiniband/sw/rxe/Makefile | 3 +- drivers/infiniband/sw/rxe/rxe_ns.c | 136 +++++++++++++++++++++++++++++ drivers/infiniband/sw/rxe/rxe_ns.h | 17 ++++ 3 files changed, 155 insertions(+), 1 deletion(-) create mode 100644 drivers/infiniband/sw/rxe/rxe_ns.c create mode 100644 drivers/infiniband/sw/rxe/rxe_ns.h diff --git a/drivers/infiniband/sw/rxe/Makefile b/drivers/infiniband/sw/rxe/Makefile index 93134f1d1d0c..3977f4f13258 100644 --- a/drivers/infiniband/sw/rxe/Makefile +++ b/drivers/infiniband/sw/rxe/Makefile @@ -22,6 +22,7 @@ rdma_rxe-y := \ rxe_mcast.o \ rxe_task.o \ rxe_net.o \ - rxe_hw_counters.o + rxe_hw_counters.o \ + rxe_ns.o rdma_rxe-$(CONFIG_INFINIBAND_ON_DEMAND_PAGING) += rxe_odp.o diff --git a/drivers/infiniband/sw/rxe/rxe_ns.c b/drivers/infiniband/sw/rxe/rxe_ns.c new file mode 100644 index 000000000000..6fe056c81ef3 --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_ns.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "rxe_ns.h" + +/* + * Per network namespace data + */ +struct rxe_ns_sock { + struct sock __rcu *rxe_sk4; + struct sock __rcu *rxe_sk6; +}; + +/* + * Index to store custom data for each network namespace. + */ +static unsigned int rxe_pernet_id; + +/* + * Called for every existing and added network namespaces + */ +static int rxe_ns_init(struct net *net) +{ + /* defer socket create in the namespace to the first + * device create. + */ + + return 0; +} + +static void rxe_ns_exit(struct net *net) +{ + /* called when the network namespace is removed + */ + struct rxe_ns_sock *ns_sk = net_generic(net, rxe_pernet_id); + struct sock *sk; + + sk = rcu_dereference(ns_sk->rxe_sk4); + if (sk) { + rcu_assign_pointer(ns_sk->rxe_sk4, NULL); + udp_tunnel_sock_release(sk->sk_socket); + } + +#if IS_ENABLED(CONFIG_IPV6) + sk = rcu_dereference(ns_sk->rxe_sk6); + if (sk) { + rcu_assign_pointer(ns_sk->rxe_sk6, NULL); + udp_tunnel_sock_release(sk->sk_socket); + } +#endif +} + +/* + * callback to make the module network namespace aware + */ +static struct pernet_operations rxe_net_ops = { + .init = rxe_ns_init, + .exit = rxe_ns_exit, + .id = &rxe_pernet_id, + .size = sizeof(struct rxe_ns_sock), +}; + +struct sock *rxe_ns_pernet_sk4(struct net *net) +{ + struct rxe_ns_sock *ns_sk = net_generic(net, rxe_pernet_id); + struct sock *sk; + + rcu_read_lock(); + sk = rcu_dereference(ns_sk->rxe_sk4); + rcu_read_unlock(); + + return sk; +} + +void rxe_ns_pernet_set_sk4(struct net *net, struct sock *sk) +{ + struct rxe_ns_sock *ns_sk = net_generic(net, rxe_pernet_id); + + rcu_assign_pointer(ns_sk->rxe_sk4, sk); + synchronize_rcu(); +} + +#if IS_ENABLED(CONFIG_IPV6) +struct sock *rxe_ns_pernet_sk6(struct net *net) +{ + struct rxe_ns_sock *ns_sk = net_generic(net, rxe_pernet_id); + struct sock *sk; + + rcu_read_lock(); + sk = rcu_dereference(ns_sk->rxe_sk6); + rcu_read_unlock(); + + return sk; +} + +void rxe_ns_pernet_set_sk6(struct net *net, struct sock *sk) +{ + struct rxe_ns_sock *ns_sk = net_generic(net, rxe_pernet_id); + + rcu_assign_pointer(ns_sk->rxe_sk6, sk); + synchronize_rcu(); +} + +#else /* IPV6 */ + +struct sock *rxe_ns_pernet_sk6(struct net *net) +{ + return NULL; +} + +void rxe_ns_pernet_set_sk6(struct net *net, struct sock *sk) +{ +} + +#endif /* IPV6 */ + +int rxe_namespace_init(void) +{ + return register_pernet_subsys(&rxe_net_ops); +} + +void rxe_namespace_exit(void) +{ + unregister_pernet_subsys(&rxe_net_ops); +} diff --git a/drivers/infiniband/sw/rxe/rxe_ns.h b/drivers/infiniband/sw/rxe/rxe_ns.h new file mode 100644 index 000000000000..998511742c47 --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_ns.h @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + */ + +#ifndef RXE_NS_H +#define RXE_NS_H + +struct sock *rxe_ns_pernet_sk4(struct net *net); +struct sock *rxe_ns_pernet_sk6(struct net *net); +void rxe_ns_pernet_set_sk4(struct net *net, struct sock *sk); +void rxe_ns_pernet_set_sk6(struct net *net, struct sock *sk); +int rxe_namespace_init(void); +void rxe_namespace_exit(void); + +#endif /* RXE_NS_H */ -- 2.52.0