d25a92ccae
This patch allows to create smc socket via AF_INET, similar to the following code, /* create v4 smc sock */ v4 = socket(AF_INET, SOCK_STREAM, IPPROTO_SMC); /* create v6 smc sock */ v6 = socket(AF_INET6, SOCK_STREAM, IPPROTO_SMC); There are several reasons why we believe it is appropriate here: 1. For smc sockets, it actually use IPv4 (AF-INET) or IPv6 (AF-INET6) address. There is no AF_SMC address at all. 2. Create smc socket in the AF_INET(6) path, which allows us to reuse the infrastructure of AF_INET(6) path, such as common ebpf hooks. Otherwise, smc have to implement it again in AF_SMC path. Signed-off-by: D. Wythe <alibuda@linux.alibaba.com> Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com> Reviewed-by: Dust Li <dust.li@linux.alibaba.com> Tested-by: Niklas Schnelle <schnelle@linux.ibm.com> Tested-by: Wenjia Zhang <wenjia@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
159 lines
3.7 KiB
C
159 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* Definitions for the IPPROTO_SMC (socket related)
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*
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* Copyright IBM Corp. 2016, 2018
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* Copyright (c) 2024, Alibaba Inc.
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*
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* Author: D. Wythe <alibuda@linux.alibaba.com>
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*/
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#include <net/protocol.h>
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#include <net/sock.h>
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#include "smc_inet.h"
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#include "smc.h"
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static int smc_inet_init_sock(struct sock *sk);
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static struct proto smc_inet_prot = {
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.name = "INET_SMC",
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.owner = THIS_MODULE,
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.init = smc_inet_init_sock,
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.hash = smc_hash_sk,
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.unhash = smc_unhash_sk,
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.release_cb = smc_release_cb,
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.obj_size = sizeof(struct smc_sock),
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.h.smc_hash = &smc_v4_hashinfo,
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.slab_flags = SLAB_TYPESAFE_BY_RCU,
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};
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static const struct proto_ops smc_inet_stream_ops = {
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.family = PF_INET,
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.owner = THIS_MODULE,
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.release = smc_release,
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.bind = smc_bind,
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.connect = smc_connect,
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.socketpair = sock_no_socketpair,
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.accept = smc_accept,
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.getname = smc_getname,
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.poll = smc_poll,
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.ioctl = smc_ioctl,
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.listen = smc_listen,
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.shutdown = smc_shutdown,
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.setsockopt = smc_setsockopt,
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.getsockopt = smc_getsockopt,
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.sendmsg = smc_sendmsg,
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.recvmsg = smc_recvmsg,
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.mmap = sock_no_mmap,
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.splice_read = smc_splice_read,
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};
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static struct inet_protosw smc_inet_protosw = {
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.type = SOCK_STREAM,
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.protocol = IPPROTO_SMC,
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.prot = &smc_inet_prot,
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.ops = &smc_inet_stream_ops,
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.flags = INET_PROTOSW_ICSK,
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};
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#if IS_ENABLED(CONFIG_IPV6)
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static struct proto smc_inet6_prot = {
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.name = "INET6_SMC",
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.owner = THIS_MODULE,
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.init = smc_inet_init_sock,
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.hash = smc_hash_sk,
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.unhash = smc_unhash_sk,
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.release_cb = smc_release_cb,
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.obj_size = sizeof(struct smc_sock),
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.h.smc_hash = &smc_v6_hashinfo,
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.slab_flags = SLAB_TYPESAFE_BY_RCU,
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};
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static const struct proto_ops smc_inet6_stream_ops = {
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.family = PF_INET6,
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.owner = THIS_MODULE,
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.release = smc_release,
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.bind = smc_bind,
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.connect = smc_connect,
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.socketpair = sock_no_socketpair,
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.accept = smc_accept,
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.getname = smc_getname,
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.poll = smc_poll,
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.ioctl = smc_ioctl,
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.listen = smc_listen,
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.shutdown = smc_shutdown,
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.setsockopt = smc_setsockopt,
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.getsockopt = smc_getsockopt,
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.sendmsg = smc_sendmsg,
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.recvmsg = smc_recvmsg,
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.mmap = sock_no_mmap,
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.splice_read = smc_splice_read,
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};
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static struct inet_protosw smc_inet6_protosw = {
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.type = SOCK_STREAM,
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.protocol = IPPROTO_SMC,
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.prot = &smc_inet6_prot,
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.ops = &smc_inet6_stream_ops,
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.flags = INET_PROTOSW_ICSK,
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};
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#endif /* CONFIG_IPV6 */
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static int smc_inet_init_sock(struct sock *sk)
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{
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struct net *net = sock_net(sk);
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/* init common smc sock */
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smc_sk_init(net, sk, IPPROTO_SMC);
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/* create clcsock */
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return smc_create_clcsk(net, sk, sk->sk_family);
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}
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int __init smc_inet_init(void)
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{
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int rc;
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rc = proto_register(&smc_inet_prot, 1);
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if (rc) {
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pr_err("%s: proto_register smc_inet_prot fails with %d\n",
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__func__, rc);
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return rc;
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}
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/* no return value */
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inet_register_protosw(&smc_inet_protosw);
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#if IS_ENABLED(CONFIG_IPV6)
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rc = proto_register(&smc_inet6_prot, 1);
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if (rc) {
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pr_err("%s: proto_register smc_inet6_prot fails with %d\n",
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__func__, rc);
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goto out_inet6_prot;
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}
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rc = inet6_register_protosw(&smc_inet6_protosw);
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if (rc) {
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pr_err("%s: inet6_register_protosw smc_inet6_protosw fails with %d\n",
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__func__, rc);
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goto out_inet6_protosw;
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}
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return rc;
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out_inet6_protosw:
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proto_unregister(&smc_inet6_prot);
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out_inet6_prot:
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inet_unregister_protosw(&smc_inet_protosw);
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proto_unregister(&smc_inet_prot);
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#endif /* CONFIG_IPV6 */
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return rc;
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}
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void smc_inet_exit(void)
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{
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#if IS_ENABLED(CONFIG_IPV6)
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inet6_unregister_protosw(&smc_inet6_protosw);
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proto_unregister(&smc_inet6_prot);
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#endif /* CONFIG_IPV6 */
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inet_unregister_protosw(&smc_inet_protosw);
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proto_unregister(&smc_inet_prot);
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}
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