Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Shared Memory Communications over RDMA (SMC-R) and RoCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Socket Closing - normal and abnormal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  Copyright IBM Corp. 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *  Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <net/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "smc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "smc_tx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "smc_cdc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include "smc_close.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) /* release the clcsock that is assigned to the smc_sock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) void smc_clcsock_release(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct socket *tcp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (smc->listen_smc && current_work() != &smc->smc_listen_work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		cancel_work_sync(&smc->smc_listen_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	mutex_lock(&smc->clcsock_release_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (smc->clcsock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		tcp = smc->clcsock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		smc->clcsock = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		sock_release(tcp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	mutex_unlock(&smc->clcsock_release_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static void smc_close_cleanup_listen(struct sock *parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	/* Close non-accepted connections */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	while ((sk = smc_accept_dequeue(parent, NULL)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		smc_close_non_accepted(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) /* wait for sndbuf data being transmitted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static void smc_close_stream_wait(struct smc_sock *smc, long timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	DEFINE_WAIT_FUNC(wait, woken_wake_function);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (!timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (!smc_tx_prepared_sends(&smc->conn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	smc->wait_close_tx_prepared = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	add_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	while (!signal_pending(current) && timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		rc = sk_wait_event(sk, &timeout,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 				   !smc_tx_prepared_sends(&smc->conn) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 				   sk->sk_err == ECONNABORTED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 				   sk->sk_err == ECONNRESET ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 				   smc->conn.killed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				   &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	remove_wait_queue(sk_sleep(sk), &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	smc->wait_close_tx_prepared = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) void smc_close_wake_tx_prepared(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	if (smc->wait_close_tx_prepared)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		/* wake up socket closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		smc->sk.sk_state_change(&smc->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static int smc_close_wr(struct smc_connection *conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	conn->local_tx_ctrl.conn_state_flags.peer_done_writing = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	return smc_cdc_get_slot_and_msg_send(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) static int smc_close_final(struct smc_connection *conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (atomic_read(&conn->bytes_to_rcv))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		conn->local_tx_ctrl.conn_state_flags.peer_conn_closed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	if (conn->killed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		return -EPIPE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return smc_cdc_get_slot_and_msg_send(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int smc_close_abort(struct smc_connection *conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	conn->local_tx_ctrl.conn_state_flags.peer_conn_abort = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	return smc_cdc_get_slot_and_msg_send(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static void smc_close_cancel_work(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	cancel_work_sync(&smc->conn.close_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	cancel_delayed_work_sync(&smc->conn.tx_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* terminate smc socket abnormally - active abort
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * link group is terminated, i.e. RDMA communication no longer possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) void smc_close_active_abort(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	bool release_clcsock = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (sk->sk_state != SMC_INIT && smc->clcsock && smc->clcsock->sk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		sk->sk_err = ECONNABORTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		if (smc->clcsock && smc->clcsock->sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			tcp_abort(smc->clcsock->sk, ECONNABORTED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	case SMC_ACTIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	case SMC_APPCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	case SMC_APPCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		sk->sk_state = SMC_PEERABORTWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		smc_close_cancel_work(smc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		if (sk->sk_state != SMC_PEERABORTWAIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		sock_put(sk); /* (postponed) passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	case SMC_PEERCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	case SMC_PEERCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	case SMC_PEERFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		sk->sk_state = SMC_PEERABORTWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		smc_close_cancel_work(smc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		if (sk->sk_state != SMC_PEERABORTWAIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		smc_conn_free(&smc->conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		release_clcsock = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		sock_put(sk); /* passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	case SMC_PROCESSABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	case SMC_APPFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		sk->sk_state = SMC_PEERABORTWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		smc_close_cancel_work(smc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		if (sk->sk_state != SMC_PEERABORTWAIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		smc_conn_free(&smc->conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		release_clcsock = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	case SMC_INIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	case SMC_PEERABORTWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	case SMC_CLOSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	sock_set_flag(sk, SOCK_DEAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (release_clcsock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		smc_clcsock_release(smc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static inline bool smc_close_sent_any_close(struct smc_connection *conn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	return conn->local_tx_ctrl.conn_state_flags.peer_conn_abort ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	       conn->local_tx_ctrl.conn_state_flags.peer_conn_closed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int smc_close_active(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct smc_cdc_conn_state_flags *txflags =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		&smc->conn.local_tx_ctrl.conn_state_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	struct smc_connection *conn = &smc->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	int old_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	int rc1 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	timeout = current->flags & PF_EXITING ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		  0 : sock_flag(sk, SOCK_LINGER) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		      sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	old_state = sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	case SMC_INIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	case SMC_LISTEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		sk->sk_state_change(sk); /* wake up accept */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		if (smc->clcsock && smc->clcsock->sk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 			smc->clcsock->sk->sk_data_ready = smc->clcsk_data_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			smc->clcsock->sk->sk_user_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			rc = kernel_sock_shutdown(smc->clcsock, SHUT_RDWR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		smc_close_cleanup_listen(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		flush_work(&smc->tcp_listen_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	case SMC_ACTIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		smc_close_stream_wait(smc, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		cancel_delayed_work_sync(&conn->tx_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		if (sk->sk_state == SMC_ACTIVE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			/* send close request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			rc = smc_close_final(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			sk->sk_state = SMC_PEERCLOSEWAIT1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			/* actively shutdown clcsock before peer close it,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 			 * prevent peer from entering TIME_WAIT state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 			if (smc->clcsock && smc->clcsock->sk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 				rc1 = kernel_sock_shutdown(smc->clcsock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 							   SHUT_RDWR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 				rc = rc ? rc : rc1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 			/* peer event has changed the state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	case SMC_APPFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		/* socket already shutdown wr or both (active close) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		if (txflags->peer_done_writing &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		    !smc_close_sent_any_close(conn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 			/* just shutdown wr done, send close request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 			rc = smc_close_final(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	case SMC_APPCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	case SMC_APPCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		if (!smc_cdc_rxed_any_close(conn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			smc_close_stream_wait(smc, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		cancel_delayed_work_sync(&conn->tx_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		if (sk->sk_state != SMC_APPCLOSEWAIT1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		    sk->sk_state != SMC_APPCLOSEWAIT2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		/* confirm close from peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		rc = smc_close_final(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		if (smc_cdc_rxed_any_close(conn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 			/* peer has closed the socket already */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 			sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 			sock_put(sk); /* postponed passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 			/* peer has just issued a shutdown write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 			sk->sk_state = SMC_PEERFINCLOSEWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	case SMC_PEERCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	case SMC_PEERCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		if (txflags->peer_done_writing &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		    !smc_close_sent_any_close(conn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 			/* just shutdown wr done, send close request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 			rc = smc_close_final(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		/* peer sending PeerConnectionClosed will cause transition */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	case SMC_PEERFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		/* peer sending PeerConnectionClosed will cause transition */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	case SMC_PROCESSABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		rc = smc_close_abort(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	case SMC_PEERABORTWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	case SMC_CLOSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		/* nothing to do, add tracing in future patch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	if (old_state != sk->sk_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static void smc_close_passive_abort_received(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	struct smc_cdc_conn_state_flags *txflags =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		&smc->conn.local_tx_ctrl.conn_state_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	case SMC_INIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	case SMC_ACTIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	case SMC_APPCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		sk->sk_state = SMC_PROCESSABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		sock_put(sk); /* passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	case SMC_APPFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		sk->sk_state = SMC_PROCESSABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	case SMC_PEERCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	case SMC_PEERCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		if (txflags->peer_done_writing &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		    !smc_close_sent_any_close(&smc->conn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 			/* just shutdown, but not yet closed locally */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 			sk->sk_state = SMC_PROCESSABORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		sock_put(sk); /* passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	case SMC_APPCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	case SMC_PEERFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		sock_put(sk); /* passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	case SMC_PEERABORTWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	case SMC_PROCESSABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	/* nothing to do, add tracing in future patch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /* Either some kind of closing has been received: peer_conn_closed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)  * peer_conn_abort, or peer_done_writing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)  * or the link group of the connection terminates abnormally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) static void smc_close_passive_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	struct smc_connection *conn = container_of(work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 						   struct smc_connection,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 						   close_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	struct smc_cdc_conn_state_flags *rxflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	bool release_clcsock = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	int old_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	old_state = sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	rxflags = &conn->local_rx_ctrl.conn_state_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	if (rxflags->peer_conn_abort) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		/* peer has not received all data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		smc_close_passive_abort_received(smc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		release_sock(&smc->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		cancel_delayed_work_sync(&conn->tx_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		lock_sock(&smc->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		goto wakeup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	case SMC_INIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		sk->sk_state = SMC_APPCLOSEWAIT1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	case SMC_ACTIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		sk->sk_state = SMC_APPCLOSEWAIT1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		/* postpone sock_put() for passive closing to cover
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		 * received SEND_SHUTDOWN as well
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	case SMC_PEERCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		if (rxflags->peer_done_writing)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 			sk->sk_state = SMC_PEERCLOSEWAIT2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 		/* to check for closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	case SMC_PEERCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 		if (!smc_cdc_rxed_any_close(conn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		if (sock_flag(sk, SOCK_DEAD) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 		    smc_close_sent_any_close(conn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 			/* smc_release has already been called locally */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 			sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 			/* just shutdown, but not yet closed locally */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 			sk->sk_state = SMC_APPFINCLOSEWAIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 		sock_put(sk); /* passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	case SMC_PEERFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		if (smc_cdc_rxed_any_close(conn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 			sk->sk_state = SMC_CLOSED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 			sock_put(sk); /* passive closing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	case SMC_APPCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	case SMC_APPCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		/* postpone sock_put() for passive closing to cover
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 		 * received SEND_SHUTDOWN as well
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	case SMC_APPFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	case SMC_PEERABORTWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	case SMC_PROCESSABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	case SMC_CLOSED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 		/* nothing to do, add tracing in future patch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) wakeup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	sk->sk_data_ready(sk); /* wakeup blocked rcvbuf consumers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 	sk->sk_write_space(sk); /* wakeup blocked sndbuf producers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	if (old_state != sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 		sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		if ((sk->sk_state == SMC_CLOSED) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 		    (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 			smc_conn_free(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 			if (smc->clcsock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 				release_clcsock = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	if (release_clcsock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 		smc_clcsock_release(smc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	sock_put(sk); /* sock_hold done by schedulers of close_work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) int smc_close_shutdown_write(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	struct smc_connection *conn = &smc->conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	struct sock *sk = &smc->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	int old_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	timeout = current->flags & PF_EXITING ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		  0 : sock_flag(sk, SOCK_LINGER) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		      sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	old_state = sk->sk_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	switch (sk->sk_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	case SMC_ACTIVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 		smc_close_stream_wait(smc, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 		cancel_delayed_work_sync(&conn->tx_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 		lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 		if (sk->sk_state != SMC_ACTIVE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 			goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 		/* send close wr request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 		rc = smc_close_wr(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 		sk->sk_state = SMC_PEERCLOSEWAIT1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	case SMC_APPCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 		/* passive close */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 		if (!smc_cdc_rxed_any_close(conn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 			smc_close_stream_wait(smc, timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 		release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 		cancel_delayed_work_sync(&conn->tx_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 		lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 		if (sk->sk_state != SMC_APPCLOSEWAIT1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 			goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 		/* confirm close from peer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 		rc = smc_close_wr(conn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 		sk->sk_state = SMC_APPCLOSEWAIT2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 	case SMC_APPCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	case SMC_PEERFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 	case SMC_PEERCLOSEWAIT1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	case SMC_PEERCLOSEWAIT2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	case SMC_APPFINCLOSEWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	case SMC_PROCESSABORT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 	case SMC_PEERABORTWAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 		/* nothing to do, add tracing in future patch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 	if (old_state != sk->sk_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 		sk->sk_state_change(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /* Initialize close properties on connection establishment. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) void smc_close_init(struct smc_sock *smc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	INIT_WORK(&smc->conn.close_work, smc_close_passive_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) }