2017-01-09 08:55:13 -07:00
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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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* AF_SMC protocol family socket handler keeping the AF_INET sock address type
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* applies to SOCK_STREAM sockets only
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* offers an alternative communication option for TCP-protocol sockets
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* applicable with RoCE-cards only
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*
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2017-01-09 08:55:16 -07:00
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* Initial restrictions:
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* - support for alternate links postponed
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*
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2018-03-16 08:06:41 -06:00
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* Copyright IBM Corp. 2016, 2018
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2017-01-09 08:55:13 -07:00
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*
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* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
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* based on prototype from Frank Blaschka
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*/
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#define KMSG_COMPONENT "smc"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/module.h>
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#include <linux/socket.h>
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2017-01-09 08:55:16 -07:00
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#include <linux/workqueue.h>
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2017-01-09 08:55:22 -07:00
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#include <linux/in.h>
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2017-02-02 00:35:14 -07:00
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#include <linux/sched/signal.h>
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2017-01-09 08:55:13 -07:00
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#include <net/sock.h>
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2017-01-09 08:55:16 -07:00
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#include <net/tcp.h>
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2017-01-09 08:55:26 -07:00
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#include <net/smc.h>
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2018-05-02 08:56:46 -06:00
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#include <asm/ioctls.h>
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2017-01-09 08:55:13 -07:00
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#include "smc.h"
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2017-01-09 08:55:16 -07:00
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#include "smc_clc.h"
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2017-01-09 08:55:21 -07:00
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#include "smc_llc.h"
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2017-01-09 08:55:22 -07:00
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#include "smc_cdc.h"
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2017-01-09 08:55:17 -07:00
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#include "smc_core.h"
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2017-01-09 08:55:14 -07:00
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#include "smc_ib.h"
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2017-01-09 08:55:15 -07:00
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#include "smc_pnet.h"
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2017-01-09 08:55:23 -07:00
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#include "smc_tx.h"
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2017-01-09 08:55:24 -07:00
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#include "smc_rx.h"
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2017-01-09 08:55:25 -07:00
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#include "smc_close.h"
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2017-01-09 08:55:13 -07:00
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2017-01-09 08:55:17 -07:00
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static DEFINE_MUTEX(smc_create_lgr_pending); /* serialize link group
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* creation
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*/
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2017-01-09 08:55:16 -07:00
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static void smc_tcp_listen_work(struct work_struct *);
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2017-01-09 08:55:13 -07:00
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static void smc_set_keepalive(struct sock *sk, int val)
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{
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struct smc_sock *smc = smc_sk(sk);
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smc->clcsock->sk->sk_prot->keepalive(smc->clcsock->sk, val);
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}
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2017-01-09 08:55:26 -07:00
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static struct smc_hashinfo smc_v4_hashinfo = {
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.lock = __RW_LOCK_UNLOCKED(smc_v4_hashinfo.lock),
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};
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2018-03-16 08:06:41 -06:00
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static struct smc_hashinfo smc_v6_hashinfo = {
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.lock = __RW_LOCK_UNLOCKED(smc_v6_hashinfo.lock),
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};
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2017-01-09 08:55:26 -07:00
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int smc_hash_sk(struct sock *sk)
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{
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struct smc_hashinfo *h = sk->sk_prot->h.smc_hash;
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struct hlist_head *head;
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head = &h->ht;
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write_lock_bh(&h->lock);
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sk_add_node(sk, head);
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sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
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write_unlock_bh(&h->lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(smc_hash_sk);
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void smc_unhash_sk(struct sock *sk)
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{
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struct smc_hashinfo *h = sk->sk_prot->h.smc_hash;
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write_lock_bh(&h->lock);
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if (sk_del_node_init(sk))
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sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
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write_unlock_bh(&h->lock);
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}
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EXPORT_SYMBOL_GPL(smc_unhash_sk);
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struct proto smc_proto = {
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2017-01-09 08:55:13 -07:00
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.name = "SMC",
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.owner = THIS_MODULE,
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.keepalive = smc_set_keepalive,
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2017-01-09 08:55:26 -07:00
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.hash = smc_hash_sk,
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.unhash = smc_unhash_sk,
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2017-01-09 08:55:13 -07:00
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.obj_size = sizeof(struct smc_sock),
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2017-01-09 08:55:26 -07:00
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.h.smc_hash = &smc_v4_hashinfo,
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2017-01-18 03:53:44 -07:00
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.slab_flags = SLAB_TYPESAFE_BY_RCU,
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2017-01-09 08:55:13 -07:00
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};
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2017-01-09 08:55:26 -07:00
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EXPORT_SYMBOL_GPL(smc_proto);
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2017-01-09 08:55:13 -07:00
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2018-03-16 08:06:41 -06:00
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struct proto smc_proto6 = {
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.name = "SMC6",
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.owner = THIS_MODULE,
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.keepalive = smc_set_keepalive,
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.hash = smc_hash_sk,
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.unhash = smc_unhash_sk,
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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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EXPORT_SYMBOL_GPL(smc_proto6);
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2017-01-09 08:55:13 -07:00
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static int smc_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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struct smc_sock *smc;
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2017-01-09 08:55:25 -07:00
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int rc = 0;
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2017-01-09 08:55:13 -07:00
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if (!sk)
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goto out;
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smc = smc_sk(sk);
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2017-01-09 08:55:25 -07:00
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if (sk->sk_state == SMC_LISTEN)
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/* smc_close_non_accepted() is called and acquires
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* sock lock for child sockets again
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*/
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lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
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else
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lock_sock(sk);
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2017-01-09 08:55:13 -07:00
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2018-01-26 01:28:48 -07:00
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if (!smc->use_fallback) {
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2017-01-09 08:55:25 -07:00
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rc = smc_close_active(smc);
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sock_set_flag(sk, SOCK_DEAD);
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sk->sk_shutdown |= SHUTDOWN_MASK;
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}
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2017-01-09 08:55:13 -07:00
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if (smc->clcsock) {
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sock_release(smc->clcsock);
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smc->clcsock = NULL;
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}
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2018-01-26 01:28:48 -07:00
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if (smc->use_fallback) {
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sock_put(sk); /* passive closing */
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sk->sk_state = SMC_CLOSED;
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sk->sk_state_change(sk);
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}
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2017-01-09 08:55:13 -07:00
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/* detach socket */
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sock_orphan(sk);
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sock->sk = NULL;
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2018-01-26 01:28:48 -07:00
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if (!smc->use_fallback && sk->sk_state == SMC_CLOSED)
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2017-01-09 08:55:25 -07:00
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smc_conn_free(&smc->conn);
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2017-01-09 08:55:13 -07:00
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release_sock(sk);
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2018-01-26 01:28:48 -07:00
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sk->sk_prot->unhash(sk);
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sock_put(sk); /* final sock_put */
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2017-01-09 08:55:13 -07:00
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out:
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2017-01-09 08:55:25 -07:00
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return rc;
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2017-01-09 08:55:13 -07:00
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}
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static void smc_destruct(struct sock *sk)
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{
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if (sk->sk_state != SMC_CLOSED)
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return;
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if (!sock_flag(sk, SOCK_DEAD))
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return;
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sk_refcnt_debug_dec(sk);
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}
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2018-03-16 08:06:41 -06:00
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static struct sock *smc_sock_alloc(struct net *net, struct socket *sock,
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int protocol)
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2017-01-09 08:55:13 -07:00
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{
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struct smc_sock *smc;
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2018-03-16 08:06:41 -06:00
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struct proto *prot;
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2017-01-09 08:55:13 -07:00
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struct sock *sk;
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2018-03-16 08:06:41 -06:00
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prot = (protocol == SMCPROTO_SMC6) ? &smc_proto6 : &smc_proto;
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sk = sk_alloc(net, PF_SMC, GFP_KERNEL, prot, 0);
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2017-01-09 08:55:13 -07:00
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if (!sk)
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return NULL;
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sock_init_data(sock, sk); /* sets sk_refcnt to 1 */
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sk->sk_state = SMC_INIT;
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sk->sk_destruct = smc_destruct;
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2018-03-16 08:06:41 -06:00
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sk->sk_protocol = protocol;
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2017-01-09 08:55:13 -07:00
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smc = smc_sk(sk);
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2017-01-09 08:55:16 -07:00
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INIT_WORK(&smc->tcp_listen_work, smc_tcp_listen_work);
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net/smc: init conn.tx_work & conn.send_lock sooner
syzkaller found that following program crashes the host :
{
int fd = socket(AF_SMC, SOCK_STREAM, 0);
int val = 1;
listen(fd, 0);
shutdown(fd, SHUT_RDWR);
setsockopt(fd, 6, TCP_NODELAY, &val, 4);
}
Simply initialize conn.tx_work & conn.send_lock at socket creation,
rather than deeper in the stack.
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null)
WARNING: CPU: 1 PID: 13988 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 13988 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #46
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
panic+0x22f/0x4de kernel/panic.c:184
__warn.cold.8+0x163/0x1b3 kernel/panic.c:536
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326
RSP: 0018:ffff880197a37880 EFLAGS: 00010086
RAX: 0000000000000061 RBX: 0000000000000005 RCX: ffffc90001ed0000
RDX: 0000000000004aaf RSI: ffffffff8160f6f1 RDI: 0000000000000001
RBP: ffff880197a378c0 R08: ffff8801aa7a0080 R09: ffffed003b5e3eb2
R10: ffffed003b5e3eb2 R11: ffff8801daf1f597 R12: 0000000000000001
R13: ffffffff88d96980 R14: ffffffff87fa19a0 R15: ffffffff81666ec0
debug_object_assert_init+0x309/0x500 lib/debugobjects.c:692
debug_timer_assert_init kernel/time/timer.c:724 [inline]
debug_assert_init kernel/time/timer.c:776 [inline]
del_timer+0x74/0x140 kernel/time/timer.c:1198
try_to_grab_pending+0x439/0x9a0 kernel/workqueue.c:1223
mod_delayed_work_on+0x91/0x250 kernel/workqueue.c:1592
mod_delayed_work include/linux/workqueue.h:541 [inline]
smc_setsockopt+0x387/0x6d0 net/smc/af_smc.c:1367
__sys_setsockopt+0x1bd/0x390 net/socket.c:1903
__do_sys_setsockopt net/socket.c:1914 [inline]
__se_sys_setsockopt net/socket.c:1911 [inline]
__x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Fixes: 01d2f7e2cdd3 ("net/smc: sockopts TCP_NODELAY and TCP_CORK")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ursula Braun <ubraun@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-17 04:54:21 -06:00
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INIT_DELAYED_WORK(&smc->conn.tx_work, smc_tx_work);
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2017-01-09 08:55:16 -07:00
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INIT_LIST_HEAD(&smc->accept_q);
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spin_lock_init(&smc->accept_q_lock);
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net/smc: init conn.tx_work & conn.send_lock sooner
syzkaller found that following program crashes the host :
{
int fd = socket(AF_SMC, SOCK_STREAM, 0);
int val = 1;
listen(fd, 0);
shutdown(fd, SHUT_RDWR);
setsockopt(fd, 6, TCP_NODELAY, &val, 4);
}
Simply initialize conn.tx_work & conn.send_lock at socket creation,
rather than deeper in the stack.
ODEBUG: assert_init not available (active state 0) object type: timer_list hint: (null)
WARNING: CPU: 1 PID: 13988 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 13988 Comm: syz-executor0 Not tainted 4.17.0-rc4+ #46
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
panic+0x22f/0x4de kernel/panic.c:184
__warn.cold.8+0x163/0x1b3 kernel/panic.c:536
report_bug+0x252/0x2d0 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:178 [inline]
do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326
RSP: 0018:ffff880197a37880 EFLAGS: 00010086
RAX: 0000000000000061 RBX: 0000000000000005 RCX: ffffc90001ed0000
RDX: 0000000000004aaf RSI: ffffffff8160f6f1 RDI: 0000000000000001
RBP: ffff880197a378c0 R08: ffff8801aa7a0080 R09: ffffed003b5e3eb2
R10: ffffed003b5e3eb2 R11: ffff8801daf1f597 R12: 0000000000000001
R13: ffffffff88d96980 R14: ffffffff87fa19a0 R15: ffffffff81666ec0
debug_object_assert_init+0x309/0x500 lib/debugobjects.c:692
debug_timer_assert_init kernel/time/timer.c:724 [inline]
debug_assert_init kernel/time/timer.c:776 [inline]
del_timer+0x74/0x140 kernel/time/timer.c:1198
try_to_grab_pending+0x439/0x9a0 kernel/workqueue.c:1223
mod_delayed_work_on+0x91/0x250 kernel/workqueue.c:1592
mod_delayed_work include/linux/workqueue.h:541 [inline]
smc_setsockopt+0x387/0x6d0 net/smc/af_smc.c:1367
__sys_setsockopt+0x1bd/0x390 net/socket.c:1903
__do_sys_setsockopt net/socket.c:1914 [inline]
__se_sys_setsockopt net/socket.c:1911 [inline]
__x64_sys_setsockopt+0xbe/0x150 net/socket.c:1911
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Fixes: 01d2f7e2cdd3 ("net/smc: sockopts TCP_NODELAY and TCP_CORK")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ursula Braun <ubraun@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-17 04:54:21 -06:00
|
|
|
spin_lock_init(&smc->conn.send_lock);
|
2017-01-09 08:55:26 -07:00
|
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|
sk->sk_prot->hash(sk);
|
2017-01-09 08:55:16 -07:00
|
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sk_refcnt_debug_inc(sk);
|
2017-01-09 08:55:13 -07:00
|
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|
return sk;
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}
|
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|
static int smc_bind(struct socket *sock, struct sockaddr *uaddr,
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|
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int addr_len)
|
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{
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struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
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struct sock *sk = sock->sk;
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struct smc_sock *smc;
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int rc;
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smc = smc_sk(sk);
|
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|
/* replicate tests from inet_bind(), to be safe wrt. future changes */
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rc = -EINVAL;
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|
if (addr_len < sizeof(struct sockaddr_in))
|
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|
goto out;
|
|
|
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|
rc = -EAFNOSUPPORT;
|
2018-03-16 08:06:41 -06:00
|
|
|
if (addr->sin_family != AF_INET &&
|
|
|
|
addr->sin_family != AF_INET6 &&
|
|
|
|
addr->sin_family != AF_UNSPEC)
|
|
|
|
goto out;
|
2017-01-09 08:55:13 -07:00
|
|
|
/* accept AF_UNSPEC (mapped to AF_INET) only if s_addr is INADDR_ANY */
|
2018-03-16 08:06:41 -06:00
|
|
|
if (addr->sin_family == AF_UNSPEC &&
|
|
|
|
addr->sin_addr.s_addr != htonl(INADDR_ANY))
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
/* Check if socket is already active */
|
|
|
|
rc = -EINVAL;
|
|
|
|
if (sk->sk_state != SMC_INIT)
|
|
|
|
goto out_rel;
|
|
|
|
|
|
|
|
smc->clcsock->sk->sk_reuse = sk->sk_reuse;
|
|
|
|
rc = kernel_bind(smc->clcsock, uaddr, addr_len);
|
|
|
|
|
|
|
|
out_rel:
|
|
|
|
release_sock(sk);
|
|
|
|
out:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void smc_copy_sock_settings(struct sock *nsk, struct sock *osk,
|
|
|
|
unsigned long mask)
|
|
|
|
{
|
|
|
|
/* options we don't get control via setsockopt for */
|
|
|
|
nsk->sk_type = osk->sk_type;
|
|
|
|
nsk->sk_sndbuf = osk->sk_sndbuf;
|
|
|
|
nsk->sk_rcvbuf = osk->sk_rcvbuf;
|
|
|
|
nsk->sk_sndtimeo = osk->sk_sndtimeo;
|
|
|
|
nsk->sk_rcvtimeo = osk->sk_rcvtimeo;
|
|
|
|
nsk->sk_mark = osk->sk_mark;
|
|
|
|
nsk->sk_priority = osk->sk_priority;
|
|
|
|
nsk->sk_rcvlowat = osk->sk_rcvlowat;
|
|
|
|
nsk->sk_bound_dev_if = osk->sk_bound_dev_if;
|
|
|
|
nsk->sk_err = osk->sk_err;
|
|
|
|
|
|
|
|
nsk->sk_flags &= ~mask;
|
|
|
|
nsk->sk_flags |= osk->sk_flags & mask;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define SK_FLAGS_SMC_TO_CLC ((1UL << SOCK_URGINLINE) | \
|
|
|
|
(1UL << SOCK_KEEPOPEN) | \
|
|
|
|
(1UL << SOCK_LINGER) | \
|
|
|
|
(1UL << SOCK_BROADCAST) | \
|
|
|
|
(1UL << SOCK_TIMESTAMP) | \
|
|
|
|
(1UL << SOCK_DBG) | \
|
|
|
|
(1UL << SOCK_RCVTSTAMP) | \
|
|
|
|
(1UL << SOCK_RCVTSTAMPNS) | \
|
|
|
|
(1UL << SOCK_LOCALROUTE) | \
|
|
|
|
(1UL << SOCK_TIMESTAMPING_RX_SOFTWARE) | \
|
|
|
|
(1UL << SOCK_RXQ_OVFL) | \
|
|
|
|
(1UL << SOCK_WIFI_STATUS) | \
|
|
|
|
(1UL << SOCK_NOFCS) | \
|
|
|
|
(1UL << SOCK_FILTER_LOCKED))
|
|
|
|
/* copy only relevant settings and flags of SOL_SOCKET level from smc to
|
|
|
|
* clc socket (since smc is not called for these options from net/core)
|
|
|
|
*/
|
|
|
|
static void smc_copy_sock_settings_to_clc(struct smc_sock *smc)
|
|
|
|
{
|
|
|
|
smc_copy_sock_settings(smc->clcsock->sk, &smc->sk, SK_FLAGS_SMC_TO_CLC);
|
|
|
|
}
|
|
|
|
|
|
|
|
#define SK_FLAGS_CLC_TO_SMC ((1UL << SOCK_URGINLINE) | \
|
|
|
|
(1UL << SOCK_KEEPOPEN) | \
|
|
|
|
(1UL << SOCK_LINGER) | \
|
|
|
|
(1UL << SOCK_DBG))
|
|
|
|
/* copy only settings and flags relevant for smc from clc to smc socket */
|
|
|
|
static void smc_copy_sock_settings_to_smc(struct smc_sock *smc)
|
|
|
|
{
|
|
|
|
smc_copy_sock_settings(&smc->sk, smc->clcsock->sk, SK_FLAGS_CLC_TO_SMC);
|
|
|
|
}
|
|
|
|
|
2018-05-15 09:04:55 -06:00
|
|
|
/* register a new rmb, optionally send confirm_rkey msg to register with peer */
|
|
|
|
static int smc_reg_rmb(struct smc_link *link, struct smc_buf_desc *rmb_desc,
|
|
|
|
bool conf_rkey)
|
2018-05-03 09:57:37 -06:00
|
|
|
{
|
|
|
|
/* register memory region for new rmb */
|
2018-05-03 09:57:38 -06:00
|
|
|
if (smc_wr_reg_send(link, rmb_desc->mr_rx[SMC_SINGLE_LINK])) {
|
|
|
|
rmb_desc->regerr = 1;
|
2018-05-03 09:57:37 -06:00
|
|
|
return -EFAULT;
|
2018-05-03 09:57:38 -06:00
|
|
|
}
|
2018-05-15 09:04:55 -06:00
|
|
|
if (!conf_rkey)
|
|
|
|
return 0;
|
|
|
|
/* exchange confirm_rkey msg with peer */
|
|
|
|
if (smc_llc_do_confirm_rkey(link, rmb_desc)) {
|
|
|
|
rmb_desc->regerr = 1;
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
2018-05-03 09:57:37 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-03-01 05:51:26 -07:00
|
|
|
static int smc_clnt_conf_first_link(struct smc_sock *smc)
|
2017-01-09 08:55:21 -07:00
|
|
|
{
|
2018-05-02 08:56:44 -06:00
|
|
|
struct net *net = sock_net(smc->clcsock->sk);
|
2017-01-09 08:55:21 -07:00
|
|
|
struct smc_link_group *lgr = smc->conn.lgr;
|
|
|
|
struct smc_link *link;
|
|
|
|
int rest;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
link = &lgr->lnk[SMC_SINGLE_LINK];
|
|
|
|
/* receive CONFIRM LINK request from server over RoCE fabric */
|
|
|
|
rest = wait_for_completion_interruptible_timeout(
|
|
|
|
&link->llc_confirm,
|
|
|
|
SMC_LLC_WAIT_FIRST_TIME);
|
|
|
|
if (rest <= 0) {
|
|
|
|
struct smc_clc_msg_decline dclc;
|
|
|
|
|
|
|
|
rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc),
|
|
|
|
SMC_CLC_DECLINE);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2018-03-01 05:51:31 -07:00
|
|
|
if (link->llc_confirm_rc)
|
|
|
|
return SMC_CLC_DECL_RMBE_EC;
|
|
|
|
|
2017-01-09 08:55:21 -07:00
|
|
|
rc = smc_ib_modify_qp_rts(link);
|
|
|
|
if (rc)
|
|
|
|
return SMC_CLC_DECL_INTERR;
|
|
|
|
|
|
|
|
smc_wr_remember_qp_attr(link);
|
2017-07-28 05:56:17 -06:00
|
|
|
|
2018-05-15 09:04:55 -06:00
|
|
|
if (smc_reg_rmb(link, smc->conn.rmb_desc, false))
|
2017-07-28 05:56:17 -06:00
|
|
|
return SMC_CLC_DECL_INTERR;
|
|
|
|
|
2017-01-09 08:55:21 -07:00
|
|
|
/* send CONFIRM LINK response over RoCE fabric */
|
|
|
|
rc = smc_llc_send_confirm_link(link,
|
|
|
|
link->smcibdev->mac[link->ibport - 1],
|
2018-03-01 05:51:26 -07:00
|
|
|
&link->smcibdev->gid[link->ibport - 1],
|
|
|
|
SMC_LLC_RESP);
|
2017-01-09 08:55:21 -07:00
|
|
|
if (rc < 0)
|
|
|
|
return SMC_CLC_DECL_TCL;
|
|
|
|
|
2018-03-01 05:51:32 -07:00
|
|
|
/* receive ADD LINK request from server over RoCE fabric */
|
|
|
|
rest = wait_for_completion_interruptible_timeout(&link->llc_add,
|
|
|
|
SMC_LLC_WAIT_TIME);
|
|
|
|
if (rest <= 0) {
|
|
|
|
struct smc_clc_msg_decline dclc;
|
|
|
|
|
|
|
|
rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc),
|
|
|
|
SMC_CLC_DECLINE);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* send add link reject message, only one link supported for now */
|
|
|
|
rc = smc_llc_send_add_link(link,
|
|
|
|
link->smcibdev->mac[link->ibport - 1],
|
|
|
|
&link->smcibdev->gid[link->ibport - 1],
|
|
|
|
SMC_LLC_RESP);
|
|
|
|
if (rc < 0)
|
|
|
|
return SMC_CLC_DECL_TCL;
|
|
|
|
|
2018-05-02 08:56:44 -06:00
|
|
|
smc_llc_link_active(link, net->ipv4.sysctl_tcp_keepalive_time);
|
2018-03-01 05:51:32 -07:00
|
|
|
|
2018-03-01 05:51:31 -07:00
|
|
|
return 0;
|
2017-01-09 08:55:21 -07:00
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:17 -07:00
|
|
|
static void smc_conn_save_peer_info(struct smc_sock *smc,
|
|
|
|
struct smc_clc_msg_accept_confirm *clc)
|
|
|
|
{
|
2018-05-18 01:34:13 -06:00
|
|
|
int bufsize = smc_uncompress_bufsize(clc->rmbe_size);
|
|
|
|
|
2018-05-18 01:34:12 -06:00
|
|
|
smc->conn.peer_rmbe_idx = clc->rmbe_idx;
|
2017-01-09 08:55:22 -07:00
|
|
|
smc->conn.local_tx_ctrl.token = ntohl(clc->rmbe_alert_token);
|
2018-05-18 01:34:13 -06:00
|
|
|
smc->conn.peer_rmbe_size = bufsize;
|
2017-01-09 08:55:18 -07:00
|
|
|
atomic_set(&smc->conn.peer_rmbe_space, smc->conn.peer_rmbe_size);
|
2018-05-18 01:34:13 -06:00
|
|
|
smc->conn.tx_off = bufsize * (smc->conn.peer_rmbe_idx - 1);
|
2017-01-09 08:55:17 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void smc_link_save_peer_info(struct smc_link *link,
|
|
|
|
struct smc_clc_msg_accept_confirm *clc)
|
|
|
|
{
|
|
|
|
link->peer_qpn = ntoh24(clc->qpn);
|
|
|
|
memcpy(link->peer_gid, clc->lcl.gid, SMC_GID_SIZE);
|
|
|
|
memcpy(link->peer_mac, clc->lcl.mac, sizeof(link->peer_mac));
|
|
|
|
link->peer_psn = ntoh24(clc->psn);
|
|
|
|
link->peer_mtu = clc->qp_mtu;
|
|
|
|
}
|
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* fall back during connect */
|
|
|
|
static int smc_connect_fallback(struct smc_sock *smc)
|
2017-01-09 08:55:16 -07:00
|
|
|
{
|
2018-05-18 01:34:18 -06:00
|
|
|
smc->use_fallback = true;
|
|
|
|
smc_copy_sock_settings_to_clc(smc);
|
|
|
|
if (smc->sk.sk_state == SMC_INIT)
|
|
|
|
smc->sk.sk_state = SMC_ACTIVE;
|
|
|
|
return 0;
|
|
|
|
}
|
2018-01-26 01:28:48 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* decline and fall back during connect */
|
|
|
|
static int smc_connect_decline_fallback(struct smc_sock *smc, int reason_code)
|
|
|
|
{
|
|
|
|
int rc;
|
2018-04-26 09:18:21 -06:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
if (reason_code < 0) /* error, fallback is not possible */
|
|
|
|
return reason_code;
|
|
|
|
if (reason_code != SMC_CLC_DECL_REPLY) {
|
|
|
|
rc = smc_clc_send_decline(smc, reason_code);
|
|
|
|
if (rc < 0)
|
|
|
|
return rc;
|
2017-10-25 03:01:46 -06:00
|
|
|
}
|
2018-05-18 01:34:18 -06:00
|
|
|
return smc_connect_fallback(smc);
|
|
|
|
}
|
2017-10-25 03:01:46 -06:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* abort connecting */
|
|
|
|
static int smc_connect_abort(struct smc_sock *smc, int reason_code,
|
|
|
|
int local_contact)
|
|
|
|
{
|
|
|
|
if (local_contact == SMC_FIRST_CONTACT)
|
|
|
|
smc_lgr_forget(smc->conn.lgr);
|
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
|
|
|
smc_conn_free(&smc->conn);
|
|
|
|
if (reason_code < 0 && smc->sk.sk_state == SMC_INIT)
|
|
|
|
sock_put(&smc->sk); /* passive closing */
|
|
|
|
return reason_code;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* check if there is a rdma device available for this connection. */
|
|
|
|
/* called for connect and listen */
|
|
|
|
static int smc_check_rdma(struct smc_sock *smc, struct smc_ib_device **ibdev,
|
|
|
|
u8 *ibport)
|
|
|
|
{
|
|
|
|
int reason_code = 0;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
|
|
|
/* PNET table look up: search active ib_device and port
|
|
|
|
* within same PNETID that also contains the ethernet device
|
|
|
|
* used for the internal TCP socket
|
|
|
|
*/
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_pnet_find_roce_resource(smc->clcsock->sk, ibdev, ibport);
|
|
|
|
if (!(*ibdev))
|
2017-01-09 08:55:16 -07:00
|
|
|
reason_code = SMC_CLC_DECL_CNFERR; /* configuration error */
|
2018-05-18 01:34:18 -06:00
|
|
|
|
|
|
|
return reason_code;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* CLC handshake during connect */
|
|
|
|
static int smc_connect_clc(struct smc_sock *smc,
|
|
|
|
struct smc_clc_msg_accept_confirm *aclc,
|
|
|
|
struct smc_ib_device *ibdev, u8 ibport)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
|
|
|
/* do inband token exchange */
|
2018-05-18 01:34:18 -06:00
|
|
|
rc = smc_clc_send_proposal(smc, ibdev, ibport);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
2017-01-09 08:55:16 -07:00
|
|
|
/* receive SMC Accept CLC message */
|
2018-05-18 01:34:18 -06:00
|
|
|
return smc_clc_wait_msg(smc, aclc, sizeof(*aclc), SMC_CLC_ACCEPT);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* setup for RDMA connection of client */
|
|
|
|
static int smc_connect_rdma(struct smc_sock *smc,
|
|
|
|
struct smc_clc_msg_accept_confirm *aclc,
|
|
|
|
struct smc_ib_device *ibdev, u8 ibport)
|
|
|
|
{
|
|
|
|
int local_contact = SMC_FIRST_CONTACT;
|
|
|
|
struct smc_link *link;
|
|
|
|
int reason_code = 0;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2017-01-09 08:55:17 -07:00
|
|
|
mutex_lock(&smc_create_lgr_pending);
|
2018-05-18 01:34:18 -06:00
|
|
|
local_contact = smc_conn_create(smc, ibdev, ibport, &aclc->lcl,
|
|
|
|
aclc->hdr.flag);
|
2017-01-09 08:55:17 -07:00
|
|
|
if (local_contact < 0) {
|
2018-05-18 01:34:18 -06:00
|
|
|
if (local_contact == -ENOMEM)
|
2017-01-09 08:55:17 -07:00
|
|
|
reason_code = SMC_CLC_DECL_MEM;/* insufficient memory*/
|
2018-05-18 01:34:18 -06:00
|
|
|
else if (local_contact == -ENOLINK)
|
2017-01-09 08:55:17 -07:00
|
|
|
reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */
|
2018-05-15 09:05:00 -06:00
|
|
|
else
|
|
|
|
reason_code = SMC_CLC_DECL_INTERR; /* other error */
|
2018-05-18 01:34:18 -06:00
|
|
|
return smc_connect_abort(smc, reason_code, 0);
|
2017-01-09 08:55:17 -07:00
|
|
|
}
|
|
|
|
link = &smc->conn.lgr->lnk[SMC_SINGLE_LINK];
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_conn_save_peer_info(smc, aclc);
|
2017-01-09 08:55:18 -07:00
|
|
|
|
2017-07-28 05:56:20 -06:00
|
|
|
/* create send buffer and rmb */
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_buf_create(smc))
|
|
|
|
return smc_connect_abort(smc, SMC_CLC_DECL_MEM, local_contact);
|
2017-01-09 08:55:18 -07:00
|
|
|
|
2017-01-09 08:55:17 -07:00
|
|
|
if (local_contact == SMC_FIRST_CONTACT)
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_link_save_peer_info(link, aclc);
|
2017-01-09 08:55:20 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_rmb_rtoken_handling(&smc->conn, aclc))
|
|
|
|
return smc_connect_abort(smc, SMC_CLC_DECL_INTERR,
|
|
|
|
local_contact);
|
2017-01-09 08:55:20 -07:00
|
|
|
|
2017-04-10 06:58:01 -06:00
|
|
|
smc_close_init(smc);
|
|
|
|
smc_rx_init(smc);
|
|
|
|
|
2017-01-09 08:55:20 -07:00
|
|
|
if (local_contact == SMC_FIRST_CONTACT) {
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_ib_ready_link(link))
|
|
|
|
return smc_connect_abort(smc, SMC_CLC_DECL_INTERR,
|
|
|
|
local_contact);
|
2017-07-28 05:56:17 -06:00
|
|
|
} else {
|
2018-05-18 01:34:18 -06:00
|
|
|
if (!smc->conn.rmb_desc->reused &&
|
|
|
|
smc_reg_rmb(link, smc->conn.rmb_desc, true))
|
|
|
|
return smc_connect_abort(smc, SMC_CLC_DECL_INTERR,
|
|
|
|
local_contact);
|
2017-01-09 08:55:20 -07:00
|
|
|
}
|
2017-07-28 05:56:22 -06:00
|
|
|
smc_rmb_sync_sg_for_device(&smc->conn);
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
reason_code = smc_clc_send_confirm(smc);
|
|
|
|
if (reason_code)
|
|
|
|
return smc_connect_abort(smc, reason_code, local_contact);
|
|
|
|
|
|
|
|
smc_tx_init(smc);
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2017-01-09 08:55:21 -07:00
|
|
|
if (local_contact == SMC_FIRST_CONTACT) {
|
|
|
|
/* QP confirmation over RoCE fabric */
|
2018-03-01 05:51:26 -07:00
|
|
|
reason_code = smc_clnt_conf_first_link(smc);
|
2018-05-18 01:34:18 -06:00
|
|
|
if (reason_code)
|
|
|
|
return smc_connect_abort(smc, reason_code,
|
|
|
|
local_contact);
|
2017-01-09 08:55:21 -07:00
|
|
|
}
|
2017-01-09 08:55:17 -07:00
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
2017-01-09 08:55:23 -07:00
|
|
|
|
2017-01-09 08:55:16 -07:00
|
|
|
smc_copy_sock_settings_to_clc(smc);
|
2017-01-09 08:55:25 -07:00
|
|
|
if (smc->sk.sk_state == SMC_INIT)
|
|
|
|
smc->sk.sk_state = SMC_ACTIVE;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
return 0;
|
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* perform steps before actually connecting */
|
|
|
|
static int __smc_connect(struct smc_sock *smc)
|
|
|
|
{
|
|
|
|
struct smc_clc_msg_accept_confirm aclc;
|
|
|
|
struct smc_ib_device *ibdev;
|
|
|
|
int rc = 0;
|
|
|
|
u8 ibport;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
sock_hold(&smc->sk); /* sock put in passive closing */
|
|
|
|
|
|
|
|
if (smc->use_fallback)
|
|
|
|
return smc_connect_fallback(smc);
|
|
|
|
|
|
|
|
/* if peer has not signalled SMC-capability, fall back */
|
|
|
|
if (!tcp_sk(smc->clcsock->sk)->syn_smc)
|
|
|
|
return smc_connect_fallback(smc);
|
|
|
|
|
|
|
|
/* IPSec connections opt out of SMC-R optimizations */
|
|
|
|
if (using_ipsec(smc))
|
|
|
|
return smc_connect_decline_fallback(smc, SMC_CLC_DECL_IPSEC);
|
|
|
|
|
|
|
|
/* check if a RDMA device is available; if not, fall back */
|
|
|
|
if (smc_check_rdma(smc, &ibdev, &ibport))
|
|
|
|
return smc_connect_decline_fallback(smc, SMC_CLC_DECL_CNFERR);
|
|
|
|
|
|
|
|
/* perform CLC handshake */
|
|
|
|
rc = smc_connect_clc(smc, &aclc, ibdev, ibport);
|
|
|
|
if (rc)
|
|
|
|
return smc_connect_decline_fallback(smc, rc);
|
|
|
|
|
|
|
|
/* connect using rdma */
|
|
|
|
rc = smc_connect_rdma(smc, &aclc, ibdev, ibport);
|
|
|
|
if (rc)
|
|
|
|
return smc_connect_decline_fallback(smc, rc);
|
|
|
|
|
|
|
|
return 0;
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
static int smc_connect(struct socket *sock, struct sockaddr *addr,
|
|
|
|
int alen, int flags)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc = -EINVAL;
|
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
|
|
|
|
/* separate smc parameter checking to be safe */
|
|
|
|
if (alen < sizeof(addr->sa_family))
|
|
|
|
goto out_err;
|
2018-03-16 08:06:41 -06:00
|
|
|
if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out_err;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (sk->sk_state) {
|
|
|
|
default:
|
|
|
|
goto out;
|
|
|
|
case SMC_ACTIVE:
|
|
|
|
rc = -EISCONN;
|
|
|
|
goto out;
|
|
|
|
case SMC_INIT:
|
|
|
|
rc = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
smc_copy_sock_settings_to_clc(smc);
|
2017-10-25 03:01:46 -06:00
|
|
|
tcp_sk(smc->clcsock->sk)->syn_smc = 1;
|
2017-01-09 08:55:13 -07:00
|
|
|
rc = kernel_connect(smc->clcsock, addr, alen, flags);
|
|
|
|
if (rc)
|
|
|
|
goto out;
|
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
rc = __smc_connect(smc);
|
2017-01-09 08:55:16 -07:00
|
|
|
if (rc < 0)
|
|
|
|
goto out;
|
|
|
|
else
|
|
|
|
rc = 0; /* success cases including fallback */
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
out:
|
|
|
|
release_sock(sk);
|
|
|
|
out_err:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_clcsock_accept(struct smc_sock *lsmc, struct smc_sock **new_smc)
|
|
|
|
{
|
2018-01-24 02:28:12 -07:00
|
|
|
struct socket *new_clcsock = NULL;
|
|
|
|
struct sock *lsk = &lsmc->sk;
|
2017-01-09 08:55:13 -07:00
|
|
|
struct sock *new_sk;
|
|
|
|
int rc;
|
|
|
|
|
2018-01-24 02:28:12 -07:00
|
|
|
release_sock(lsk);
|
2018-03-16 08:06:41 -06:00
|
|
|
new_sk = smc_sock_alloc(sock_net(lsk), NULL, lsk->sk_protocol);
|
2017-01-09 08:55:13 -07:00
|
|
|
if (!new_sk) {
|
|
|
|
rc = -ENOMEM;
|
2018-01-24 02:28:12 -07:00
|
|
|
lsk->sk_err = ENOMEM;
|
2017-01-09 08:55:13 -07:00
|
|
|
*new_smc = NULL;
|
2018-01-24 02:28:12 -07:00
|
|
|
lock_sock(lsk);
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
*new_smc = smc_sk(new_sk);
|
|
|
|
|
|
|
|
rc = kernel_accept(lsmc->clcsock, &new_clcsock, 0);
|
2018-01-24 02:28:12 -07:00
|
|
|
lock_sock(lsk);
|
2018-01-24 02:28:13 -07:00
|
|
|
if (rc < 0)
|
2018-01-24 02:28:12 -07:00
|
|
|
lsk->sk_err = -rc;
|
2018-01-24 02:28:13 -07:00
|
|
|
if (rc < 0 || lsk->sk_state == SMC_CLOSED) {
|
2017-01-09 08:55:16 -07:00
|
|
|
if (new_clcsock)
|
|
|
|
sock_release(new_clcsock);
|
|
|
|
new_sk->sk_state = SMC_CLOSED;
|
|
|
|
sock_set_flag(new_sk, SOCK_DEAD);
|
2018-01-24 02:28:12 -07:00
|
|
|
new_sk->sk_prot->unhash(new_sk);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_put(new_sk); /* final */
|
2017-01-09 08:55:13 -07:00
|
|
|
*new_smc = NULL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
(*new_smc)->clcsock = new_clcsock;
|
|
|
|
out:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:16 -07:00
|
|
|
/* add a just created sock to the accept queue of the listen sock as
|
|
|
|
* candidate for a following socket accept call from user space
|
|
|
|
*/
|
|
|
|
static void smc_accept_enqueue(struct sock *parent, struct sock *sk)
|
|
|
|
{
|
|
|
|
struct smc_sock *par = smc_sk(parent);
|
|
|
|
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_hold(sk); /* sock_put in smc_accept_unlink () */
|
2017-01-09 08:55:16 -07:00
|
|
|
spin_lock(&par->accept_q_lock);
|
|
|
|
list_add_tail(&smc_sk(sk)->accept_q, &par->accept_q);
|
|
|
|
spin_unlock(&par->accept_q_lock);
|
|
|
|
sk_acceptq_added(parent);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* remove a socket from the accept queue of its parental listening socket */
|
|
|
|
static void smc_accept_unlink(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct smc_sock *par = smc_sk(sk)->listen_smc;
|
|
|
|
|
|
|
|
spin_lock(&par->accept_q_lock);
|
|
|
|
list_del_init(&smc_sk(sk)->accept_q);
|
|
|
|
spin_unlock(&par->accept_q_lock);
|
|
|
|
sk_acceptq_removed(&smc_sk(sk)->listen_smc->sk);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_put(sk); /* sock_hold in smc_accept_enqueue */
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* remove a sock from the accept queue to bind it to a new socket created
|
|
|
|
* for a socket accept call from user space
|
|
|
|
*/
|
2017-01-09 08:55:25 -07:00
|
|
|
struct sock *smc_accept_dequeue(struct sock *parent,
|
|
|
|
struct socket *new_sock)
|
2017-01-09 08:55:16 -07:00
|
|
|
{
|
|
|
|
struct smc_sock *isk, *n;
|
|
|
|
struct sock *new_sk;
|
|
|
|
|
|
|
|
list_for_each_entry_safe(isk, n, &smc_sk(parent)->accept_q, accept_q) {
|
|
|
|
new_sk = (struct sock *)isk;
|
|
|
|
|
|
|
|
smc_accept_unlink(new_sk);
|
|
|
|
if (new_sk->sk_state == SMC_CLOSED) {
|
2018-01-26 01:28:49 -07:00
|
|
|
if (isk->clcsock) {
|
|
|
|
sock_release(isk->clcsock);
|
|
|
|
isk->clcsock = NULL;
|
|
|
|
}
|
2017-04-10 06:58:04 -06:00
|
|
|
new_sk->sk_prot->unhash(new_sk);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_put(new_sk); /* final */
|
2017-01-09 08:55:16 -07:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (new_sock)
|
|
|
|
sock_graft(new_sk, new_sock);
|
|
|
|
return new_sk;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* clean up for a created but never accepted sock */
|
2017-01-09 08:55:25 -07:00
|
|
|
void smc_close_non_accepted(struct sock *sk)
|
2017-01-09 08:55:16 -07:00
|
|
|
{
|
|
|
|
struct smc_sock *smc = smc_sk(sk);
|
|
|
|
|
2017-01-09 08:55:25 -07:00
|
|
|
lock_sock(sk);
|
|
|
|
if (!sk->sk_lingertime)
|
|
|
|
/* wait for peer closing */
|
|
|
|
sk->sk_lingertime = SMC_MAX_STREAM_WAIT_TIMEOUT;
|
2018-01-26 01:28:48 -07:00
|
|
|
if (!smc->use_fallback) {
|
2017-01-09 08:55:25 -07:00
|
|
|
smc_close_active(smc);
|
2017-04-10 06:58:04 -06:00
|
|
|
sock_set_flag(sk, SOCK_DEAD);
|
|
|
|
sk->sk_shutdown |= SHUTDOWN_MASK;
|
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
if (smc->clcsock) {
|
|
|
|
struct socket *tcp;
|
|
|
|
|
|
|
|
tcp = smc->clcsock;
|
|
|
|
smc->clcsock = NULL;
|
|
|
|
sock_release(tcp);
|
|
|
|
}
|
2017-01-09 08:55:25 -07:00
|
|
|
if (smc->use_fallback) {
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_put(sk); /* passive closing */
|
|
|
|
sk->sk_state = SMC_CLOSED;
|
|
|
|
} else {
|
|
|
|
if (sk->sk_state == SMC_CLOSED)
|
|
|
|
smc_conn_free(&smc->conn);
|
2017-01-09 08:55:25 -07:00
|
|
|
}
|
|
|
|
release_sock(sk);
|
2018-01-26 01:28:48 -07:00
|
|
|
sk->sk_prot->unhash(sk);
|
|
|
|
sock_put(sk); /* final sock_put */
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:21 -07:00
|
|
|
static int smc_serv_conf_first_link(struct smc_sock *smc)
|
|
|
|
{
|
2018-05-02 08:56:44 -06:00
|
|
|
struct net *net = sock_net(smc->clcsock->sk);
|
2017-01-09 08:55:21 -07:00
|
|
|
struct smc_link_group *lgr = smc->conn.lgr;
|
|
|
|
struct smc_link *link;
|
|
|
|
int rest;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
link = &lgr->lnk[SMC_SINGLE_LINK];
|
2017-07-28 05:56:17 -06:00
|
|
|
|
2018-05-15 09:04:55 -06:00
|
|
|
if (smc_reg_rmb(link, smc->conn.rmb_desc, false))
|
2017-07-28 05:56:17 -06:00
|
|
|
return SMC_CLC_DECL_INTERR;
|
|
|
|
|
2017-01-09 08:55:21 -07:00
|
|
|
/* send CONFIRM LINK request to client over the RoCE fabric */
|
|
|
|
rc = smc_llc_send_confirm_link(link,
|
|
|
|
link->smcibdev->mac[link->ibport - 1],
|
|
|
|
&link->smcibdev->gid[link->ibport - 1],
|
|
|
|
SMC_LLC_REQ);
|
|
|
|
if (rc < 0)
|
|
|
|
return SMC_CLC_DECL_TCL;
|
|
|
|
|
|
|
|
/* receive CONFIRM LINK response from client over the RoCE fabric */
|
|
|
|
rest = wait_for_completion_interruptible_timeout(
|
|
|
|
&link->llc_confirm_resp,
|
|
|
|
SMC_LLC_WAIT_FIRST_TIME);
|
|
|
|
if (rest <= 0) {
|
|
|
|
struct smc_clc_msg_decline dclc;
|
|
|
|
|
|
|
|
rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc),
|
|
|
|
SMC_CLC_DECLINE);
|
2018-03-01 05:51:31 -07:00
|
|
|
return rc;
|
2017-01-09 08:55:21 -07:00
|
|
|
}
|
|
|
|
|
2018-03-01 05:51:31 -07:00
|
|
|
if (link->llc_confirm_resp_rc)
|
|
|
|
return SMC_CLC_DECL_RMBE_EC;
|
|
|
|
|
2018-03-01 05:51:32 -07:00
|
|
|
/* send ADD LINK request to client over the RoCE fabric */
|
|
|
|
rc = smc_llc_send_add_link(link,
|
|
|
|
link->smcibdev->mac[link->ibport - 1],
|
|
|
|
&link->smcibdev->gid[link->ibport - 1],
|
|
|
|
SMC_LLC_REQ);
|
|
|
|
if (rc < 0)
|
|
|
|
return SMC_CLC_DECL_TCL;
|
|
|
|
|
|
|
|
/* receive ADD LINK response from client over the RoCE fabric */
|
|
|
|
rest = wait_for_completion_interruptible_timeout(&link->llc_add_resp,
|
|
|
|
SMC_LLC_WAIT_TIME);
|
|
|
|
if (rest <= 0) {
|
|
|
|
struct smc_clc_msg_decline dclc;
|
|
|
|
|
|
|
|
rc = smc_clc_wait_msg(smc, &dclc, sizeof(dclc),
|
|
|
|
SMC_CLC_DECLINE);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2018-05-02 08:56:44 -06:00
|
|
|
smc_llc_link_active(link, net->ipv4.sysctl_tcp_keepalive_time);
|
2018-03-01 05:51:32 -07:00
|
|
|
|
2018-03-01 05:51:31 -07:00
|
|
|
return 0;
|
2017-01-09 08:55:21 -07:00
|
|
|
}
|
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* listen worker: finish */
|
|
|
|
static void smc_listen_out(struct smc_sock *new_smc)
|
2017-01-09 08:55:16 -07:00
|
|
|
{
|
|
|
|
struct smc_sock *lsmc = new_smc->listen_smc;
|
|
|
|
struct sock *newsmcsk = &new_smc->sk;
|
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
lock_sock_nested(&lsmc->sk, SINGLE_DEPTH_NESTING);
|
|
|
|
if (lsmc->sk.sk_state == SMC_LISTEN) {
|
|
|
|
smc_accept_enqueue(&lsmc->sk, newsmcsk);
|
|
|
|
} else { /* no longer listening */
|
|
|
|
smc_close_non_accepted(newsmcsk);
|
2017-10-25 03:01:46 -06:00
|
|
|
}
|
2018-05-18 01:34:18 -06:00
|
|
|
release_sock(&lsmc->sk);
|
2017-10-25 03:01:46 -06:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* Wake up accept */
|
|
|
|
lsmc->sk.sk_data_ready(&lsmc->sk);
|
|
|
|
sock_put(&lsmc->sk); /* sock_hold in smc_tcp_listen_work */
|
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* listen worker: finish in state connected */
|
|
|
|
static void smc_listen_out_connected(struct smc_sock *new_smc)
|
|
|
|
{
|
|
|
|
struct sock *newsmcsk = &new_smc->sk;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
sk_refcnt_debug_inc(newsmcsk);
|
|
|
|
if (newsmcsk->sk_state == SMC_INIT)
|
|
|
|
newsmcsk->sk_state = SMC_ACTIVE;
|
|
|
|
|
|
|
|
smc_listen_out(new_smc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* listen worker: finish in error state */
|
|
|
|
static void smc_listen_out_err(struct smc_sock *new_smc)
|
|
|
|
{
|
|
|
|
struct sock *newsmcsk = &new_smc->sk;
|
|
|
|
|
|
|
|
if (newsmcsk->sk_state == SMC_INIT)
|
|
|
|
sock_put(&new_smc->sk); /* passive closing */
|
|
|
|
newsmcsk->sk_state = SMC_CLOSED;
|
|
|
|
smc_conn_free(&new_smc->conn);
|
|
|
|
|
|
|
|
smc_listen_out(new_smc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* listen worker: decline and fall back if possible */
|
|
|
|
static void smc_listen_decline(struct smc_sock *new_smc, int reason_code,
|
|
|
|
int local_contact)
|
|
|
|
{
|
|
|
|
/* RDMA setup failed, switch back to TCP */
|
|
|
|
if (local_contact == SMC_FIRST_CONTACT)
|
|
|
|
smc_lgr_forget(new_smc->conn.lgr);
|
|
|
|
if (reason_code < 0) { /* error, no fallback possible */
|
|
|
|
smc_listen_out_err(new_smc);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
smc_conn_free(&new_smc->conn);
|
|
|
|
new_smc->use_fallback = true;
|
|
|
|
if (reason_code && reason_code != SMC_CLC_DECL_REPLY) {
|
|
|
|
if (smc_clc_send_decline(new_smc, reason_code) < 0) {
|
|
|
|
smc_listen_out_err(new_smc);
|
|
|
|
return;
|
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_listen_out_connected(new_smc);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* listen worker: check prefixes */
|
|
|
|
static int smc_listen_rdma_check(struct smc_sock *new_smc,
|
|
|
|
struct smc_clc_msg_proposal *pclc)
|
|
|
|
{
|
|
|
|
struct smc_clc_msg_proposal_prefix *pclc_prfx;
|
|
|
|
struct socket *newclcsock = new_smc->clcsock;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2017-12-07 05:38:49 -07:00
|
|
|
pclc_prfx = smc_clc_proposal_get_prefix(pclc);
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_clc_prfx_match(newclcsock, pclc_prfx))
|
|
|
|
return SMC_CLC_DECL_CNFERR;
|
2018-03-16 08:06:39 -06:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
return 0;
|
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* listen worker: initialize connection and buffers */
|
|
|
|
static int smc_listen_rdma_init(struct smc_sock *new_smc,
|
|
|
|
struct smc_clc_msg_proposal *pclc,
|
|
|
|
struct smc_ib_device *ibdev, u8 ibport,
|
|
|
|
int *local_contact)
|
|
|
|
{
|
2017-01-09 08:55:17 -07:00
|
|
|
/* allocate connection / link group */
|
2018-05-18 01:34:18 -06:00
|
|
|
*local_contact = smc_conn_create(new_smc, ibdev, ibport, &pclc->lcl, 0);
|
|
|
|
if (*local_contact < 0) {
|
|
|
|
if (*local_contact == -ENOMEM)
|
|
|
|
return SMC_CLC_DECL_MEM;/* insufficient memory*/
|
|
|
|
return SMC_CLC_DECL_INTERR; /* other error */
|
2017-01-09 08:55:17 -07:00
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2017-07-28 05:56:20 -06:00
|
|
|
/* create send buffer and rmb */
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_buf_create(new_smc))
|
|
|
|
return SMC_CLC_DECL_MEM;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* listen worker: register buffers */
|
|
|
|
static int smc_listen_rdma_reg(struct smc_sock *new_smc, int local_contact)
|
|
|
|
{
|
|
|
|
struct smc_link *link = &new_smc->conn.lgr->lnk[SMC_SINGLE_LINK];
|
2017-04-10 06:58:01 -06:00
|
|
|
|
2017-07-28 05:56:17 -06:00
|
|
|
if (local_contact != SMC_FIRST_CONTACT) {
|
2018-05-03 09:57:37 -06:00
|
|
|
if (!new_smc->conn.rmb_desc->reused) {
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_reg_rmb(link, new_smc->conn.rmb_desc, true))
|
|
|
|
return SMC_CLC_DECL_INTERR;
|
2017-07-28 05:56:17 -06:00
|
|
|
}
|
|
|
|
}
|
2017-07-28 05:56:22 -06:00
|
|
|
smc_rmb_sync_sg_for_device(&new_smc->conn);
|
2017-07-28 05:56:17 -06:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* listen worker: finish RDMA setup */
|
|
|
|
static void smc_listen_rdma_finish(struct smc_sock *new_smc,
|
|
|
|
struct smc_clc_msg_accept_confirm *cclc,
|
|
|
|
int local_contact)
|
|
|
|
{
|
|
|
|
struct smc_link *link = &new_smc->conn.lgr->lnk[SMC_SINGLE_LINK];
|
|
|
|
int reason_code = 0;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2017-01-09 08:55:17 -07:00
|
|
|
if (local_contact == SMC_FIRST_CONTACT)
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_link_save_peer_info(link, cclc);
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_rmb_rtoken_handling(&new_smc->conn, cclc)) {
|
2017-01-09 08:55:20 -07:00
|
|
|
reason_code = SMC_CLC_DECL_INTERR;
|
2018-05-18 01:34:18 -06:00
|
|
|
goto decline;
|
2017-01-09 08:55:20 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
if (local_contact == SMC_FIRST_CONTACT) {
|
2018-05-18 01:34:18 -06:00
|
|
|
if (smc_ib_ready_link(link)) {
|
2017-01-09 08:55:20 -07:00
|
|
|
reason_code = SMC_CLC_DECL_INTERR;
|
2018-05-18 01:34:18 -06:00
|
|
|
goto decline;
|
2017-01-09 08:55:20 -07:00
|
|
|
}
|
2017-01-09 08:55:21 -07:00
|
|
|
/* QP confirmation over RoCE fabric */
|
|
|
|
reason_code = smc_serv_conf_first_link(new_smc);
|
2018-05-18 01:34:18 -06:00
|
|
|
if (reason_code)
|
|
|
|
goto decline;
|
2017-01-09 08:55:20 -07:00
|
|
|
}
|
2018-05-18 01:34:18 -06:00
|
|
|
return;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
decline:
|
2017-10-25 03:01:44 -06:00
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_listen_decline(new_smc, reason_code, local_contact);
|
|
|
|
}
|
2017-01-09 08:55:23 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* setup for RDMA connection of server */
|
|
|
|
static void smc_listen_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct smc_sock *new_smc = container_of(work, struct smc_sock,
|
|
|
|
smc_listen_work);
|
|
|
|
struct socket *newclcsock = new_smc->clcsock;
|
|
|
|
struct smc_clc_msg_accept_confirm cclc;
|
|
|
|
struct smc_clc_msg_proposal *pclc;
|
|
|
|
struct smc_ib_device *ibdev;
|
|
|
|
u8 buf[SMC_CLC_MAX_LEN];
|
|
|
|
int local_contact = 0;
|
|
|
|
int reason_code = 0;
|
|
|
|
int rc = 0;
|
|
|
|
u8 ibport;
|
|
|
|
|
|
|
|
if (new_smc->use_fallback) {
|
|
|
|
smc_listen_out_connected(new_smc);
|
|
|
|
return;
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* check if peer is smc capable */
|
|
|
|
if (!tcp_sk(newclcsock->sk)->syn_smc) {
|
|
|
|
new_smc->use_fallback = true;
|
|
|
|
smc_listen_out_connected(new_smc);
|
|
|
|
return;
|
|
|
|
}
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* do inband token exchange -
|
|
|
|
* wait for and receive SMC Proposal CLC message
|
|
|
|
*/
|
|
|
|
pclc = (struct smc_clc_msg_proposal *)&buf;
|
|
|
|
reason_code = smc_clc_wait_msg(new_smc, pclc, SMC_CLC_MAX_LEN,
|
|
|
|
SMC_CLC_PROPOSAL);
|
|
|
|
if (reason_code) {
|
|
|
|
smc_listen_decline(new_smc, reason_code, 0);
|
|
|
|
return;
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
2018-05-18 01:34:18 -06:00
|
|
|
/* IPSec connections opt out of SMC-R optimizations */
|
|
|
|
if (using_ipsec(new_smc)) {
|
|
|
|
smc_listen_decline(new_smc, SMC_CLC_DECL_IPSEC, 0);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_lock(&smc_create_lgr_pending);
|
|
|
|
smc_close_init(new_smc);
|
|
|
|
smc_rx_init(new_smc);
|
|
|
|
smc_tx_init(new_smc);
|
|
|
|
|
|
|
|
/* check if RDMA is available */
|
|
|
|
if (smc_check_rdma(new_smc, &ibdev, &ibport) ||
|
|
|
|
smc_listen_rdma_check(new_smc, pclc) ||
|
|
|
|
smc_listen_rdma_init(new_smc, pclc, ibdev, ibport,
|
|
|
|
&local_contact) ||
|
|
|
|
smc_listen_rdma_reg(new_smc, local_contact)) {
|
|
|
|
/* SMC not supported, decline */
|
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
|
|
|
smc_listen_decline(new_smc, SMC_CLC_DECL_CNFERR, local_contact);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* send SMC Accept CLC message */
|
|
|
|
rc = smc_clc_send_accept(new_smc, local_contact);
|
|
|
|
if (rc) {
|
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
|
|
|
smc_listen_decline(new_smc, rc, local_contact);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* receive SMC Confirm CLC message */
|
|
|
|
reason_code = smc_clc_wait_msg(new_smc, &cclc, sizeof(cclc),
|
|
|
|
SMC_CLC_CONFIRM);
|
|
|
|
if (reason_code) {
|
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
|
|
|
smc_listen_decline(new_smc, reason_code, local_contact);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* finish worker */
|
|
|
|
smc_listen_rdma_finish(new_smc, &cclc, local_contact);
|
|
|
|
smc_conn_save_peer_info(new_smc, &cclc);
|
2017-10-25 03:01:44 -06:00
|
|
|
mutex_unlock(&smc_create_lgr_pending);
|
2018-05-18 01:34:18 -06:00
|
|
|
smc_listen_out_connected(new_smc);
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void smc_tcp_listen_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct smc_sock *lsmc = container_of(work, struct smc_sock,
|
|
|
|
tcp_listen_work);
|
2018-01-24 02:28:12 -07:00
|
|
|
struct sock *lsk = &lsmc->sk;
|
2017-01-09 08:55:16 -07:00
|
|
|
struct smc_sock *new_smc;
|
|
|
|
int rc = 0;
|
|
|
|
|
2018-01-24 02:28:12 -07:00
|
|
|
lock_sock(lsk);
|
|
|
|
while (lsk->sk_state == SMC_LISTEN) {
|
2017-01-09 08:55:16 -07:00
|
|
|
rc = smc_clcsock_accept(lsmc, &new_smc);
|
|
|
|
if (rc)
|
|
|
|
goto out;
|
|
|
|
if (!new_smc)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
new_smc->listen_smc = lsmc;
|
2018-04-26 09:18:21 -06:00
|
|
|
new_smc->use_fallback = lsmc->use_fallback;
|
2018-01-24 02:28:12 -07:00
|
|
|
sock_hold(lsk); /* sock_put in smc_listen_work */
|
2017-01-09 08:55:16 -07:00
|
|
|
INIT_WORK(&new_smc->smc_listen_work, smc_listen_work);
|
|
|
|
smc_copy_sock_settings_to_smc(new_smc);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_hold(&new_smc->sk); /* sock_put in passive closing */
|
|
|
|
if (!schedule_work(&new_smc->smc_listen_work))
|
|
|
|
sock_put(&new_smc->sk);
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
2018-01-24 02:28:12 -07:00
|
|
|
release_sock(lsk);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_put(&lsmc->sk); /* sock_hold in smc_listen */
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
static int smc_listen(struct socket *sock, int backlog)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
rc = -EINVAL;
|
|
|
|
if ((sk->sk_state != SMC_INIT) && (sk->sk_state != SMC_LISTEN))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
rc = 0;
|
|
|
|
if (sk->sk_state == SMC_LISTEN) {
|
|
|
|
sk->sk_max_ack_backlog = backlog;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
/* some socket options are handled in core, so we could not apply
|
|
|
|
* them to the clc socket -- copy smc socket options to clc socket
|
|
|
|
*/
|
|
|
|
smc_copy_sock_settings_to_clc(smc);
|
2018-04-26 09:18:21 -06:00
|
|
|
if (!smc->use_fallback)
|
|
|
|
tcp_sk(smc->clcsock->sk)->syn_smc = 1;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
rc = kernel_listen(smc->clcsock, backlog);
|
|
|
|
if (rc)
|
|
|
|
goto out;
|
|
|
|
sk->sk_max_ack_backlog = backlog;
|
|
|
|
sk->sk_ack_backlog = 0;
|
|
|
|
sk->sk_state = SMC_LISTEN;
|
2017-01-09 08:55:16 -07:00
|
|
|
INIT_WORK(&smc->tcp_listen_work, smc_tcp_listen_work);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_hold(sk); /* sock_hold in tcp_listen_worker */
|
|
|
|
if (!schedule_work(&smc->tcp_listen_work))
|
|
|
|
sock_put(sk);
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
out:
|
|
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_accept(struct socket *sock, struct socket *new_sock,
|
2017-03-09 01:09:05 -07:00
|
|
|
int flags, bool kern)
|
2017-01-09 08:55:13 -07:00
|
|
|
{
|
2017-01-09 08:55:16 -07:00
|
|
|
struct sock *sk = sock->sk, *nsk;
|
|
|
|
DECLARE_WAITQUEUE(wait, current);
|
2017-01-09 08:55:13 -07:00
|
|
|
struct smc_sock *lsmc;
|
2017-01-09 08:55:16 -07:00
|
|
|
long timeo;
|
|
|
|
int rc = 0;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
lsmc = smc_sk(sk);
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_hold(sk); /* sock_put below */
|
2017-01-09 08:55:13 -07:00
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
if (lsmc->sk.sk_state != SMC_LISTEN) {
|
|
|
|
rc = -EINVAL;
|
2018-04-26 09:18:23 -06:00
|
|
|
release_sock(sk);
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:16 -07:00
|
|
|
/* Wait for an incoming connection */
|
|
|
|
timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
|
|
|
|
add_wait_queue_exclusive(sk_sleep(sk), &wait);
|
|
|
|
while (!(nsk = smc_accept_dequeue(sk, new_sock))) {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
if (!timeo) {
|
|
|
|
rc = -EAGAIN;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
timeo = schedule_timeout(timeo);
|
|
|
|
/* wakeup by sk_data_ready in smc_listen_work() */
|
|
|
|
sched_annotate_sleep();
|
|
|
|
lock_sock(sk);
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
rc = sock_intr_errno(timeo);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
2017-01-09 08:55:13 -07:00
|
|
|
|
2017-01-09 08:55:16 -07:00
|
|
|
if (!rc)
|
|
|
|
rc = sock_error(nsk);
|
2018-04-26 09:18:23 -06:00
|
|
|
release_sock(sk);
|
|
|
|
if (rc)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (lsmc->sockopt_defer_accept && !(flags & O_NONBLOCK)) {
|
|
|
|
/* wait till data arrives on the socket */
|
|
|
|
timeo = msecs_to_jiffies(lsmc->sockopt_defer_accept *
|
|
|
|
MSEC_PER_SEC);
|
|
|
|
if (smc_sk(nsk)->use_fallback) {
|
|
|
|
struct sock *clcsk = smc_sk(nsk)->clcsock->sk;
|
|
|
|
|
|
|
|
lock_sock(clcsk);
|
|
|
|
if (skb_queue_empty(&clcsk->sk_receive_queue))
|
|
|
|
sk_wait_data(clcsk, &timeo, NULL);
|
|
|
|
release_sock(clcsk);
|
|
|
|
} else if (!atomic_read(&smc_sk(nsk)->conn.bytes_to_rcv)) {
|
|
|
|
lock_sock(nsk);
|
2018-05-03 10:12:37 -06:00
|
|
|
smc_rx_wait(smc_sk(nsk), &timeo, smc_rx_data_available);
|
2018-04-26 09:18:23 -06:00
|
|
|
release_sock(nsk);
|
|
|
|
}
|
|
|
|
}
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
out:
|
2018-01-26 01:28:48 -07:00
|
|
|
sock_put(sk); /* sock_hold above */
|
2017-01-09 08:55:13 -07:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_getname(struct socket *sock, struct sockaddr *addr,
|
2018-02-12 12:00:20 -07:00
|
|
|
int peer)
|
2017-01-09 08:55:13 -07:00
|
|
|
{
|
|
|
|
struct smc_sock *smc;
|
|
|
|
|
2017-01-09 08:55:25 -07:00
|
|
|
if (peer && (sock->sk->sk_state != SMC_ACTIVE) &&
|
|
|
|
(sock->sk->sk_state != SMC_APPCLOSEWAIT1))
|
2017-01-09 08:55:13 -07:00
|
|
|
return -ENOTCONN;
|
|
|
|
|
|
|
|
smc = smc_sk(sock->sk);
|
|
|
|
|
2018-02-12 12:00:20 -07:00
|
|
|
return smc->clcsock->ops->getname(smc->clcsock, addr, peer);
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc = -EPIPE;
|
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
lock_sock(sk);
|
2017-01-09 08:55:25 -07:00
|
|
|
if ((sk->sk_state != SMC_ACTIVE) &&
|
|
|
|
(sk->sk_state != SMC_APPCLOSEWAIT1) &&
|
|
|
|
(sk->sk_state != SMC_INIT))
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
2018-04-26 09:18:21 -06:00
|
|
|
|
|
|
|
if (msg->msg_flags & MSG_FASTOPEN) {
|
|
|
|
if (sk->sk_state == SMC_INIT) {
|
|
|
|
smc->use_fallback = true;
|
|
|
|
} else {
|
|
|
|
rc = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
if (smc->use_fallback)
|
|
|
|
rc = smc->clcsock->ops->sendmsg(smc->clcsock, msg, len);
|
|
|
|
else
|
2017-01-09 08:55:23 -07:00
|
|
|
rc = smc_tx_sendmsg(smc, msg, len);
|
2017-01-09 08:55:13 -07:00
|
|
|
out:
|
|
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
|
|
|
|
int flags)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc = -ENOTCONN;
|
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
lock_sock(sk);
|
2017-01-09 08:55:25 -07:00
|
|
|
if ((sk->sk_state == SMC_INIT) ||
|
|
|
|
(sk->sk_state == SMC_LISTEN) ||
|
|
|
|
(sk->sk_state == SMC_CLOSED))
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
|
|
|
|
2017-01-09 08:55:25 -07:00
|
|
|
if (sk->sk_state == SMC_PEERFINCLOSEWAIT) {
|
|
|
|
rc = 0;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2018-05-03 10:12:39 -06:00
|
|
|
if (smc->use_fallback) {
|
2017-01-09 08:55:13 -07:00
|
|
|
rc = smc->clcsock->ops->recvmsg(smc->clcsock, msg, len, flags);
|
2018-05-03 10:12:39 -06:00
|
|
|
} else {
|
|
|
|
msg->msg_namelen = 0;
|
|
|
|
rc = smc_rx_recvmsg(smc, msg, NULL, len, flags);
|
|
|
|
}
|
2017-01-09 08:55:25 -07:00
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
out:
|
|
|
|
release_sock(sk);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2017-07-02 22:01:49 -06:00
|
|
|
static __poll_t smc_accept_poll(struct sock *parent)
|
2017-01-09 08:55:16 -07:00
|
|
|
{
|
2018-01-26 01:28:47 -07:00
|
|
|
struct smc_sock *isk = smc_sk(parent);
|
2018-02-01 08:02:53 -07:00
|
|
|
__poll_t mask = 0;
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-01-26 01:28:47 -07:00
|
|
|
spin_lock(&isk->accept_q_lock);
|
|
|
|
if (!list_empty(&isk->accept_q))
|
2018-02-11 15:34:03 -07:00
|
|
|
mask = EPOLLIN | EPOLLRDNORM;
|
2018-01-26 01:28:47 -07:00
|
|
|
spin_unlock(&isk->accept_q_lock);
|
2017-01-09 08:55:16 -07:00
|
|
|
|
2018-01-26 01:28:47 -07:00
|
|
|
return mask;
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
|
|
|
|
2018-06-11 15:07:14 -06:00
|
|
|
static __poll_t smc_poll_mask(struct socket *sock, __poll_t events)
|
2017-01-09 08:55:13 -07:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
2017-07-03 20:25:56 -06:00
|
|
|
__poll_t mask = 0;
|
2017-01-09 08:55:13 -07:00
|
|
|
struct smc_sock *smc;
|
2017-01-09 08:55:16 -07:00
|
|
|
int rc;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
2018-01-26 01:28:47 -07:00
|
|
|
if (!sk)
|
2018-02-11 15:34:03 -07:00
|
|
|
return EPOLLNVAL;
|
2018-01-26 01:28:47 -07:00
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
smc = smc_sk(sock->sk);
|
2018-01-26 01:28:47 -07:00
|
|
|
sock_hold(sk);
|
|
|
|
lock_sock(sk);
|
2017-01-09 08:55:16 -07:00
|
|
|
if ((sk->sk_state == SMC_INIT) || smc->use_fallback) {
|
|
|
|
/* delegate to CLC child sock */
|
2018-01-26 01:28:47 -07:00
|
|
|
release_sock(sk);
|
2018-06-11 15:07:14 -06:00
|
|
|
mask = smc->clcsock->ops->poll_mask(smc->clcsock, events);
|
2017-01-09 08:55:13 -07:00
|
|
|
lock_sock(sk);
|
2018-05-02 08:53:56 -06:00
|
|
|
sk->sk_err = smc->clcsock->sk->sk_err;
|
|
|
|
if (sk->sk_err) {
|
|
|
|
mask |= EPOLLERR;
|
|
|
|
} else {
|
|
|
|
/* if non-blocking connect finished ... */
|
|
|
|
if (sk->sk_state == SMC_INIT &&
|
|
|
|
mask & EPOLLOUT &&
|
|
|
|
smc->clcsock->sk->sk_state != TCP_CLOSE) {
|
2018-05-18 01:34:18 -06:00
|
|
|
rc = __smc_connect(smc);
|
2017-01-09 08:55:16 -07:00
|
|
|
if (rc < 0)
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLERR;
|
2018-01-26 01:28:47 -07:00
|
|
|
/* success cases including fallback */
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLOUT | EPOLLWRNORM;
|
2017-01-09 08:55:16 -07:00
|
|
|
}
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
} else {
|
2017-01-09 08:55:16 -07:00
|
|
|
if (sk->sk_err)
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLERR;
|
2017-01-09 08:55:25 -07:00
|
|
|
if ((sk->sk_shutdown == SHUTDOWN_MASK) ||
|
|
|
|
(sk->sk_state == SMC_CLOSED))
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLHUP;
|
2018-01-26 01:28:47 -07:00
|
|
|
if (sk->sk_state == SMC_LISTEN) {
|
|
|
|
/* woken up by sk_data_ready in smc_listen_work() */
|
|
|
|
mask = smc_accept_poll(sk);
|
|
|
|
} else {
|
|
|
|
if (atomic_read(&smc->conn.sndbuf_space) ||
|
|
|
|
sk->sk_shutdown & SEND_SHUTDOWN) {
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLOUT | EPOLLWRNORM;
|
2018-01-26 01:28:47 -07:00
|
|
|
} else {
|
|
|
|
sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
|
|
|
|
set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
|
|
|
|
}
|
|
|
|
if (atomic_read(&smc->conn.bytes_to_rcv))
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLIN | EPOLLRDNORM;
|
2018-01-26 01:28:47 -07:00
|
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
|
2018-01-26 01:28:47 -07:00
|
|
|
if (sk->sk_state == SMC_APPCLOSEWAIT1)
|
2018-02-11 15:34:03 -07:00
|
|
|
mask |= EPOLLIN;
|
2018-01-26 01:28:47 -07:00
|
|
|
}
|
2018-05-23 08:38:11 -06:00
|
|
|
if (smc->conn.urg_state == SMC_URG_VALID)
|
|
|
|
mask |= EPOLLPRI;
|
2017-01-09 08:55:25 -07:00
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
2018-01-26 01:28:47 -07:00
|
|
|
release_sock(sk);
|
|
|
|
sock_put(sk);
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
return mask;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_shutdown(struct socket *sock, int how)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc = -EINVAL;
|
2017-01-09 08:55:25 -07:00
|
|
|
int rc1 = 0;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
|
|
|
|
if ((how < SHUT_RD) || (how > SHUT_RDWR))
|
2017-01-09 08:55:25 -07:00
|
|
|
return rc;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
rc = -ENOTCONN;
|
2017-01-09 08:55:25 -07:00
|
|
|
if ((sk->sk_state != SMC_LISTEN) &&
|
|
|
|
(sk->sk_state != SMC_ACTIVE) &&
|
|
|
|
(sk->sk_state != SMC_PEERCLOSEWAIT1) &&
|
|
|
|
(sk->sk_state != SMC_PEERCLOSEWAIT2) &&
|
|
|
|
(sk->sk_state != SMC_APPCLOSEWAIT1) &&
|
|
|
|
(sk->sk_state != SMC_APPCLOSEWAIT2) &&
|
|
|
|
(sk->sk_state != SMC_APPFINCLOSEWAIT))
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
|
|
|
if (smc->use_fallback) {
|
|
|
|
rc = kernel_sock_shutdown(smc->clcsock, how);
|
|
|
|
sk->sk_shutdown = smc->clcsock->sk->sk_shutdown;
|
|
|
|
if (sk->sk_shutdown == SHUTDOWN_MASK)
|
|
|
|
sk->sk_state = SMC_CLOSED;
|
2017-01-09 08:55:25 -07:00
|
|
|
goto out;
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
2017-01-09 08:55:25 -07:00
|
|
|
switch (how) {
|
|
|
|
case SHUT_RDWR: /* shutdown in both directions */
|
|
|
|
rc = smc_close_active(smc);
|
|
|
|
break;
|
|
|
|
case SHUT_WR:
|
|
|
|
rc = smc_close_shutdown_write(smc);
|
|
|
|
break;
|
|
|
|
case SHUT_RD:
|
2018-04-19 07:56:40 -06:00
|
|
|
rc = 0;
|
|
|
|
/* nothing more to do because peer is not involved */
|
2017-01-09 08:55:25 -07:00
|
|
|
break;
|
|
|
|
}
|
2018-04-19 07:56:40 -06:00
|
|
|
if (smc->clcsock)
|
|
|
|
rc1 = kernel_sock_shutdown(smc->clcsock, how);
|
2017-01-09 08:55:25 -07:00
|
|
|
/* map sock_shutdown_cmd constants to sk_shutdown value range */
|
|
|
|
sk->sk_shutdown |= how + 1;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
out:
|
|
|
|
release_sock(sk);
|
2017-01-09 08:55:25 -07:00
|
|
|
return rc ? rc : rc1;
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_setsockopt(struct socket *sock, int level, int optname,
|
|
|
|
char __user *optval, unsigned int optlen)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
2018-04-26 09:18:22 -06:00
|
|
|
int val, rc;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
|
|
|
|
/* generic setsockopts reaching us here always apply to the
|
|
|
|
* CLC socket
|
|
|
|
*/
|
2018-04-26 09:18:21 -06:00
|
|
|
rc = smc->clcsock->ops->setsockopt(smc->clcsock, level, optname,
|
|
|
|
optval, optlen);
|
|
|
|
if (smc->clcsock->sk->sk_err) {
|
|
|
|
sk->sk_err = smc->clcsock->sk->sk_err;
|
|
|
|
sk->sk_error_report(sk);
|
|
|
|
}
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
2018-04-26 09:18:22 -06:00
|
|
|
if (optlen < sizeof(int))
|
2018-05-30 20:31:22 -06:00
|
|
|
return -EINVAL;
|
2018-04-26 09:18:22 -06:00
|
|
|
get_user(val, (int __user *)optval);
|
|
|
|
|
2018-04-26 09:18:21 -06:00
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
|
|
case TCP_ULP:
|
|
|
|
case TCP_FASTOPEN:
|
|
|
|
case TCP_FASTOPEN_CONNECT:
|
|
|
|
case TCP_FASTOPEN_KEY:
|
|
|
|
case TCP_FASTOPEN_NO_COOKIE:
|
|
|
|
/* option not supported by SMC */
|
|
|
|
if (sk->sk_state == SMC_INIT) {
|
|
|
|
smc->use_fallback = true;
|
|
|
|
} else {
|
|
|
|
if (!smc->use_fallback)
|
|
|
|
rc = -EINVAL;
|
|
|
|
}
|
|
|
|
break;
|
2018-04-26 09:18:22 -06:00
|
|
|
case TCP_NODELAY:
|
|
|
|
if (sk->sk_state != SMC_INIT && sk->sk_state != SMC_LISTEN) {
|
2018-05-15 09:04:54 -06:00
|
|
|
if (val && !smc->use_fallback)
|
2018-04-26 09:18:22 -06:00
|
|
|
mod_delayed_work(system_wq, &smc->conn.tx_work,
|
|
|
|
0);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case TCP_CORK:
|
|
|
|
if (sk->sk_state != SMC_INIT && sk->sk_state != SMC_LISTEN) {
|
2018-05-15 09:04:54 -06:00
|
|
|
if (!val && !smc->use_fallback)
|
2018-04-26 09:18:22 -06:00
|
|
|
mod_delayed_work(system_wq, &smc->conn.tx_work,
|
|
|
|
0);
|
|
|
|
}
|
|
|
|
break;
|
2018-04-26 09:18:23 -06:00
|
|
|
case TCP_DEFER_ACCEPT:
|
|
|
|
smc->sockopt_defer_accept = val;
|
|
|
|
break;
|
2018-04-26 09:18:21 -06:00
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
|
|
|
|
return rc;
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_getsockopt(struct socket *sock, int level, int optname,
|
|
|
|
char __user *optval, int __user *optlen)
|
|
|
|
{
|
|
|
|
struct smc_sock *smc;
|
|
|
|
|
|
|
|
smc = smc_sk(sock->sk);
|
|
|
|
/* socket options apply to the CLC socket */
|
|
|
|
return smc->clcsock->ops->getsockopt(smc->clcsock, level, optname,
|
|
|
|
optval, optlen);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int smc_ioctl(struct socket *sock, unsigned int cmd,
|
|
|
|
unsigned long arg)
|
|
|
|
{
|
2018-05-23 08:38:11 -06:00
|
|
|
union smc_host_cursor cons, urg;
|
|
|
|
struct smc_connection *conn;
|
2017-01-09 08:55:13 -07:00
|
|
|
struct smc_sock *smc;
|
2018-05-02 08:56:46 -06:00
|
|
|
int answ;
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
smc = smc_sk(sock->sk);
|
2018-05-23 08:38:11 -06:00
|
|
|
conn = &smc->conn;
|
2018-05-02 08:56:46 -06:00
|
|
|
if (smc->use_fallback) {
|
|
|
|
if (!smc->clcsock)
|
|
|
|
return -EBADF;
|
2017-01-09 08:55:13 -07:00
|
|
|
return smc->clcsock->ops->ioctl(smc->clcsock, cmd, arg);
|
2018-05-02 08:56:46 -06:00
|
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCINQ: /* same as FIONREAD */
|
|
|
|
if (smc->sk.sk_state == SMC_LISTEN)
|
|
|
|
return -EINVAL;
|
2018-05-23 08:38:09 -06:00
|
|
|
if (smc->sk.sk_state == SMC_INIT ||
|
|
|
|
smc->sk.sk_state == SMC_CLOSED)
|
|
|
|
answ = 0;
|
|
|
|
else
|
|
|
|
answ = atomic_read(&smc->conn.bytes_to_rcv);
|
2018-05-02 08:56:46 -06:00
|
|
|
break;
|
|
|
|
case SIOCOUTQ:
|
|
|
|
/* output queue size (not send + not acked) */
|
|
|
|
if (smc->sk.sk_state == SMC_LISTEN)
|
|
|
|
return -EINVAL;
|
2018-05-23 08:38:09 -06:00
|
|
|
if (smc->sk.sk_state == SMC_INIT ||
|
|
|
|
smc->sk.sk_state == SMC_CLOSED)
|
|
|
|
answ = 0;
|
|
|
|
else
|
|
|
|
answ = smc->conn.sndbuf_desc->len -
|
2018-05-02 08:56:46 -06:00
|
|
|
atomic_read(&smc->conn.sndbuf_space);
|
|
|
|
break;
|
|
|
|
case SIOCOUTQNSD:
|
|
|
|
/* output queue size (not send only) */
|
|
|
|
if (smc->sk.sk_state == SMC_LISTEN)
|
|
|
|
return -EINVAL;
|
2018-05-23 08:38:09 -06:00
|
|
|
if (smc->sk.sk_state == SMC_INIT ||
|
|
|
|
smc->sk.sk_state == SMC_CLOSED)
|
|
|
|
answ = 0;
|
|
|
|
else
|
|
|
|
answ = smc_tx_prepared_sends(&smc->conn);
|
2018-05-02 08:56:46 -06:00
|
|
|
break;
|
2018-05-23 08:38:11 -06:00
|
|
|
case SIOCATMARK:
|
|
|
|
if (smc->sk.sk_state == SMC_LISTEN)
|
|
|
|
return -EINVAL;
|
|
|
|
if (smc->sk.sk_state == SMC_INIT ||
|
|
|
|
smc->sk.sk_state == SMC_CLOSED) {
|
|
|
|
answ = 0;
|
|
|
|
} else {
|
|
|
|
smc_curs_write(&cons,
|
|
|
|
smc_curs_read(&conn->local_tx_ctrl.cons, conn),
|
|
|
|
conn);
|
|
|
|
smc_curs_write(&urg,
|
|
|
|
smc_curs_read(&conn->urg_curs, conn),
|
|
|
|
conn);
|
|
|
|
answ = smc_curs_diff(conn->rmb_desc->len,
|
|
|
|
&cons, &urg) == 1;
|
|
|
|
}
|
|
|
|
break;
|
2018-05-02 08:56:46 -06:00
|
|
|
default:
|
|
|
|
return -ENOIOCTLCMD;
|
|
|
|
}
|
|
|
|
|
|
|
|
return put_user(answ, (int __user *)arg);
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t smc_sendpage(struct socket *sock, struct page *page,
|
|
|
|
int offset, size_t size, int flags)
|
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc = -EPIPE;
|
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
lock_sock(sk);
|
2018-05-03 09:57:39 -06:00
|
|
|
if (sk->sk_state != SMC_ACTIVE) {
|
|
|
|
release_sock(sk);
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
2018-05-03 09:57:39 -06:00
|
|
|
}
|
|
|
|
release_sock(sk);
|
2017-01-09 08:55:13 -07:00
|
|
|
if (smc->use_fallback)
|
|
|
|
rc = kernel_sendpage(smc->clcsock, page, offset,
|
|
|
|
size, flags);
|
|
|
|
else
|
|
|
|
rc = sock_no_sendpage(sock, page, offset, size, flags);
|
|
|
|
|
|
|
|
out:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2018-05-03 10:12:39 -06:00
|
|
|
/* Map the affected portions of the rmbe into an spd, note the number of bytes
|
|
|
|
* to splice in conn->splice_pending, and press 'go'. Delays consumer cursor
|
|
|
|
* updates till whenever a respective page has been fully processed.
|
|
|
|
* Note that subsequent recv() calls have to wait till all splice() processing
|
|
|
|
* completed.
|
|
|
|
*/
|
2017-01-09 08:55:13 -07:00
|
|
|
static ssize_t smc_splice_read(struct socket *sock, loff_t *ppos,
|
|
|
|
struct pipe_inode_info *pipe, size_t len,
|
2018-05-03 10:12:39 -06:00
|
|
|
unsigned int flags)
|
2017-01-09 08:55:13 -07:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
struct smc_sock *smc;
|
|
|
|
int rc = -ENOTCONN;
|
|
|
|
|
|
|
|
smc = smc_sk(sk);
|
|
|
|
lock_sock(sk);
|
2018-05-03 10:12:39 -06:00
|
|
|
|
|
|
|
if (sk->sk_state == SMC_INIT ||
|
|
|
|
sk->sk_state == SMC_LISTEN ||
|
|
|
|
sk->sk_state == SMC_CLOSED)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (sk->sk_state == SMC_PEERFINCLOSEWAIT) {
|
|
|
|
rc = 0;
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
2018-05-03 10:12:39 -06:00
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
if (smc->use_fallback) {
|
|
|
|
rc = smc->clcsock->ops->splice_read(smc->clcsock, ppos,
|
|
|
|
pipe, len, flags);
|
|
|
|
} else {
|
2018-05-03 10:12:39 -06:00
|
|
|
if (*ppos) {
|
|
|
|
rc = -ESPIPE;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (flags & SPLICE_F_NONBLOCK)
|
|
|
|
flags = MSG_DONTWAIT;
|
|
|
|
else
|
|
|
|
flags = 0;
|
|
|
|
rc = smc_rx_recvmsg(smc, NULL, pipe, len, flags);
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
out:
|
|
|
|
release_sock(sk);
|
2018-05-03 10:12:39 -06:00
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* must look like tcp */
|
|
|
|
static const struct proto_ops smc_sock_ops = {
|
|
|
|
.family = PF_SMC,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.release = smc_release,
|
|
|
|
.bind = smc_bind,
|
|
|
|
.connect = smc_connect,
|
|
|
|
.socketpair = sock_no_socketpair,
|
|
|
|
.accept = smc_accept,
|
|
|
|
.getname = smc_getname,
|
2018-06-11 15:07:14 -06:00
|
|
|
.poll_mask = smc_poll_mask,
|
2017-01-09 08:55:13 -07:00
|
|
|
.ioctl = smc_ioctl,
|
|
|
|
.listen = smc_listen,
|
|
|
|
.shutdown = smc_shutdown,
|
|
|
|
.setsockopt = smc_setsockopt,
|
|
|
|
.getsockopt = smc_getsockopt,
|
|
|
|
.sendmsg = smc_sendmsg,
|
|
|
|
.recvmsg = smc_recvmsg,
|
|
|
|
.mmap = sock_no_mmap,
|
|
|
|
.sendpage = smc_sendpage,
|
|
|
|
.splice_read = smc_splice_read,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int smc_create(struct net *net, struct socket *sock, int protocol,
|
|
|
|
int kern)
|
|
|
|
{
|
2018-03-16 08:06:41 -06:00
|
|
|
int family = (protocol == SMCPROTO_SMC6) ? PF_INET6 : PF_INET;
|
2017-01-09 08:55:13 -07:00
|
|
|
struct smc_sock *smc;
|
|
|
|
struct sock *sk;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
rc = -ESOCKTNOSUPPORT;
|
|
|
|
if (sock->type != SOCK_STREAM)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
rc = -EPROTONOSUPPORT;
|
2018-03-16 08:06:41 -06:00
|
|
|
if (protocol != SMCPROTO_SMC && protocol != SMCPROTO_SMC6)
|
2017-01-09 08:55:13 -07:00
|
|
|
goto out;
|
|
|
|
|
|
|
|
rc = -ENOBUFS;
|
|
|
|
sock->ops = &smc_sock_ops;
|
2018-03-16 08:06:41 -06:00
|
|
|
sk = smc_sock_alloc(net, sock, protocol);
|
2017-01-09 08:55:13 -07:00
|
|
|
if (!sk)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* create internal TCP socket for CLC handshake and fallback */
|
|
|
|
smc = smc_sk(sk);
|
2017-01-09 08:55:16 -07:00
|
|
|
smc->use_fallback = false; /* assume rdma capability first */
|
2018-03-16 08:06:41 -06:00
|
|
|
rc = sock_create_kern(net, family, SOCK_STREAM, IPPROTO_TCP,
|
|
|
|
&smc->clcsock);
|
2018-02-28 04:44:09 -07:00
|
|
|
if (rc) {
|
2017-01-09 08:55:13 -07:00
|
|
|
sk_common_release(sk);
|
2018-02-28 04:44:09 -07:00
|
|
|
goto out;
|
|
|
|
}
|
2017-01-09 08:55:18 -07:00
|
|
|
smc->sk.sk_sndbuf = max(smc->clcsock->sk->sk_sndbuf, SMC_BUF_MIN_SIZE);
|
|
|
|
smc->sk.sk_rcvbuf = max(smc->clcsock->sk->sk_rcvbuf, SMC_BUF_MIN_SIZE);
|
2017-01-09 08:55:13 -07:00
|
|
|
|
|
|
|
out:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct net_proto_family smc_sock_family_ops = {
|
|
|
|
.family = PF_SMC,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.create = smc_create,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init smc_init(void)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
2017-01-09 08:55:15 -07:00
|
|
|
rc = smc_pnet_init();
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
2017-01-09 08:55:21 -07:00
|
|
|
rc = smc_llc_init();
|
|
|
|
if (rc) {
|
|
|
|
pr_err("%s: smc_llc_init fails with %d\n", __func__, rc);
|
|
|
|
goto out_pnet;
|
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:22 -07:00
|
|
|
rc = smc_cdc_init();
|
|
|
|
if (rc) {
|
|
|
|
pr_err("%s: smc_cdc_init fails with %d\n", __func__, rc);
|
|
|
|
goto out_pnet;
|
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
rc = proto_register(&smc_proto, 1);
|
|
|
|
if (rc) {
|
2018-03-16 08:06:41 -06:00
|
|
|
pr_err("%s: proto_register(v4) fails with %d\n", __func__, rc);
|
2017-01-09 08:55:15 -07:00
|
|
|
goto out_pnet;
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
|
2018-03-16 08:06:41 -06:00
|
|
|
rc = proto_register(&smc_proto6, 1);
|
|
|
|
if (rc) {
|
|
|
|
pr_err("%s: proto_register(v6) fails with %d\n", __func__, rc);
|
|
|
|
goto out_proto;
|
|
|
|
}
|
|
|
|
|
2017-01-09 08:55:13 -07:00
|
|
|
rc = sock_register(&smc_sock_family_ops);
|
|
|
|
if (rc) {
|
|
|
|
pr_err("%s: sock_register fails with %d\n", __func__, rc);
|
2018-03-16 08:06:41 -06:00
|
|
|
goto out_proto6;
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
2017-01-09 08:55:26 -07:00
|
|
|
INIT_HLIST_HEAD(&smc_v4_hashinfo.ht);
|
2018-03-16 08:06:41 -06:00
|
|
|
INIT_HLIST_HEAD(&smc_v6_hashinfo.ht);
|
2017-01-09 08:55:13 -07:00
|
|
|
|
2017-01-09 08:55:14 -07:00
|
|
|
rc = smc_ib_register_client();
|
|
|
|
if (rc) {
|
|
|
|
pr_err("%s: ib_register fails with %d\n", __func__, rc);
|
|
|
|
goto out_sock;
|
|
|
|
}
|
|
|
|
|
2017-10-25 03:01:46 -06:00
|
|
|
static_branch_enable(&tcp_have_smc);
|
2017-01-09 08:55:13 -07:00
|
|
|
return 0;
|
|
|
|
|
2017-01-09 08:55:14 -07:00
|
|
|
out_sock:
|
|
|
|
sock_unregister(PF_SMC);
|
2018-03-16 08:06:41 -06:00
|
|
|
out_proto6:
|
|
|
|
proto_unregister(&smc_proto6);
|
2017-01-09 08:55:13 -07:00
|
|
|
out_proto:
|
|
|
|
proto_unregister(&smc_proto);
|
2017-01-09 08:55:15 -07:00
|
|
|
out_pnet:
|
|
|
|
smc_pnet_exit();
|
2017-01-09 08:55:13 -07:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit smc_exit(void)
|
|
|
|
{
|
2018-05-18 01:34:11 -06:00
|
|
|
smc_core_exit();
|
2017-10-25 03:01:46 -06:00
|
|
|
static_branch_disable(&tcp_have_smc);
|
2017-01-09 08:55:14 -07:00
|
|
|
smc_ib_unregister_client();
|
2017-01-09 08:55:13 -07:00
|
|
|
sock_unregister(PF_SMC);
|
2018-03-16 08:06:41 -06:00
|
|
|
proto_unregister(&smc_proto6);
|
2017-01-09 08:55:13 -07:00
|
|
|
proto_unregister(&smc_proto);
|
2017-01-09 08:55:15 -07:00
|
|
|
smc_pnet_exit();
|
2017-01-09 08:55:13 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(smc_init);
|
|
|
|
module_exit(smc_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Ursula Braun <ubraun@linux.vnet.ibm.com>");
|
|
|
|
MODULE_DESCRIPTION("smc socket address family");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS_NETPROTO(PF_SMC);
|