diff options
Diffstat (limited to 'net')
-rw-r--r-- | net/mctp/af_mctp.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c index 8f9c77e97357..b3aeca6486e3 100644 --- a/net/mctp/af_mctp.c +++ b/net/mctp/af_mctp.c @@ -6,8 +6,171 @@ * Copyright (c) 2021 Google */ +#include <linux/net.h> +#include <linux/mctp.h> #include <linux/module.h> +#include <linux/socket.h> + +#include <net/sock.h> + +struct mctp_sock { + struct sock sk; +}; + +static int mctp_release(struct socket *sock) +{ + struct sock *sk = sock->sk; + + if (sk) { + sock->sk = NULL; + sk->sk_prot->close(sk, 0); + } + + return 0; +} + +static int mctp_bind(struct socket *sock, struct sockaddr *addr, int addrlen) +{ + return 0; +} + +static int mctp_sendmsg(struct socket *sock, struct msghdr *msg, size_t len) +{ + return 0; +} + +static int mctp_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, + int flags) +{ + return 0; +} + +static int mctp_setsockopt(struct socket *sock, int level, int optname, + sockptr_t optval, unsigned int optlen) +{ + return -EINVAL; +} + +static int mctp_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *optlen) +{ + return -EINVAL; +} + +static const struct proto_ops mctp_dgram_ops = { + .family = PF_MCTP, + .release = mctp_release, + .bind = mctp_bind, + .connect = sock_no_connect, + .socketpair = sock_no_socketpair, + .accept = sock_no_accept, + .getname = sock_no_getname, + .poll = datagram_poll, + .ioctl = sock_no_ioctl, + .gettstamp = sock_gettstamp, + .listen = sock_no_listen, + .shutdown = sock_no_shutdown, + .setsockopt = mctp_setsockopt, + .getsockopt = mctp_getsockopt, + .sendmsg = mctp_sendmsg, + .recvmsg = mctp_recvmsg, + .mmap = sock_no_mmap, + .sendpage = sock_no_sendpage, +}; + +static void mctp_sk_close(struct sock *sk, long timeout) +{ + sk_common_release(sk); +} + +static struct proto mctp_proto = { + .name = "MCTP", + .owner = THIS_MODULE, + .obj_size = sizeof(struct mctp_sock), + .close = mctp_sk_close, +}; + +static int mctp_pf_create(struct net *net, struct socket *sock, + int protocol, int kern) +{ + const struct proto_ops *ops; + struct proto *proto; + struct sock *sk; + int rc; + + if (protocol) + return -EPROTONOSUPPORT; + + /* only datagram sockets are supported */ + if (sock->type != SOCK_DGRAM) + return -ESOCKTNOSUPPORT; + + proto = &mctp_proto; + ops = &mctp_dgram_ops; + + sock->state = SS_UNCONNECTED; + sock->ops = ops; + + sk = sk_alloc(net, PF_MCTP, GFP_KERNEL, proto, kern); + if (!sk) + return -ENOMEM; + + sock_init_data(sock, sk); + + rc = 0; + if (sk->sk_prot->init) + rc = sk->sk_prot->init(sk); + + if (rc) + goto err_sk_put; + + return 0; + +err_sk_put: + sock_orphan(sk); + sock_put(sk); + return rc; +} + +static struct net_proto_family mctp_pf = { + .family = PF_MCTP, + .create = mctp_pf_create, + .owner = THIS_MODULE, +}; + +static __init int mctp_init(void) +{ + int rc; + + pr_info("mctp: management component transport protocol core\n"); + + rc = sock_register(&mctp_pf); + if (rc) + return rc; + + rc = proto_register(&mctp_proto, 0); + if (rc) + goto err_unreg_sock; + + return 0; + +err_unreg_sock: + sock_unregister(PF_MCTP); + + return rc; +} + +static __exit void mctp_exit(void) +{ + proto_unregister(&mctp_proto); + sock_unregister(PF_MCTP); +} + +module_init(mctp_init); +module_exit(mctp_exit); MODULE_DESCRIPTION("MCTP core"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Jeremy Kerr <jk@codeconstruct.com.au>"); + +MODULE_ALIAS_NETPROTO(PF_MCTP); |