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Commit 5d6b66c0 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'smc-bug-fixes' 



Ursula Braun says:

====================
net/smc: bug fixes 2017-09-20

here is a collection of small smc-patches built for net fixing
smc problems in different areas.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents f0ef1f4f 8c96feee

net/smc/af_smc.c

+9 −7
Original line number Diff line number Diff line
@@ -282,6 +282,7 @@ int smc_netinfo_by_tcpsk(struct socket *clcsock, 
			 __be32 *subnet, u8 *prefix_len)

{

	struct dst_entry *dst = sk_dst_get(clcsock->sk);

	struct in_device *in_dev;

	struct sockaddr_in addr;

	int rc = -ENOENT;

	int len;
@@ -298,14 +299,17 @@ int smc_netinfo_by_tcpsk(struct socket *clcsock, 
	/* get address to which the internal TCP socket is bound */

	kernel_getsockname(clcsock, (struct sockaddr *)&addr, &len);

	/* analyze IPv4 specific data of net_device belonging to TCP socket */

	for_ifa(dst->dev->ip_ptr) {

		if (ifa->ifa_address != addr.sin_addr.s_addr)

	rcu_read_lock();

	in_dev = __in_dev_get_rcu(dst->dev);

	for_ifa(in_dev) {

		if (!inet_ifa_match(addr.sin_addr.s_addr, ifa))

			continue;

		*prefix_len = inet_mask_len(ifa->ifa_mask);

		*subnet = ifa->ifa_address & ifa->ifa_mask;

		rc = 0;

		break;

	} endfor_ifa(dst->dev->ip_ptr);

	} endfor_ifa(in_dev);

	rcu_read_unlock();



out_rel:

	dst_release(dst);
@@ -509,7 +513,7 @@ static int smc_connect_rdma(struct smc_sock *smc) 
	/* RDMA setup failed, switch back to TCP */

	smc->use_fallback = true;

	if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {

		rc = smc_clc_send_decline(smc, reason_code, 0);

		rc = smc_clc_send_decline(smc, reason_code);

		if (rc < sizeof(struct smc_clc_msg_decline))

			goto out_err;

	}
@@ -804,8 +808,6 @@ static void smc_listen_work(struct work_struct *work) 
		rc = local_contact;

		if (rc == -ENOMEM)

			reason_code = SMC_CLC_DECL_MEM;/* insufficient memory*/

		else if (rc == -ENOLINK)

			reason_code = SMC_CLC_DECL_SYNCERR; /* synchr. error */

		goto decline_rdma;

	}

	link = &new_smc->conn.lgr->lnk[SMC_SINGLE_LINK];
@@ -899,7 +901,7 @@ static void smc_listen_work(struct work_struct *work) 
	smc_conn_free(&new_smc->conn);

	new_smc->use_fallback = true;

	if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) {

		rc = smc_clc_send_decline(new_smc, reason_code, 0);

		rc = smc_clc_send_decline(new_smc, reason_code);

		if (rc < sizeof(struct smc_clc_msg_decline))

			goto out_err;

	}

net/smc/smc.h

+1 −1
Original line number Diff line number Diff line
@@ -149,7 +149,7 @@ struct smc_connection { 
	atomic_t		sndbuf_space;	/* remaining space in sndbuf */

	u16			tx_cdc_seq;	/* sequence # for CDC send */

	spinlock_t		send_lock;	/* protect wr_sends */

	struct work_struct	tx_work;	/* retry of smc_cdc_msg_send */

	struct delayed_work	tx_work;	/* retry of smc_cdc_msg_send */



	struct smc_host_cdc_msg	local_rx_ctrl;	/* filled during event_handl.

						 * .prod cf. TCP rcv_nxt

net/smc/smc_clc.c

+5 −5
Original line number Diff line number Diff line
@@ -95,9 +95,10 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, 
	}

	if (clcm->type == SMC_CLC_DECLINE) {

		reason_code = SMC_CLC_DECL_REPLY;

		if (ntohl(((struct smc_clc_msg_decline *)buf)->peer_diagnosis)

			== SMC_CLC_DECL_SYNCERR)

		if (((struct smc_clc_msg_decline *)buf)->hdr.flag) {

			smc->conn.lgr->sync_err = true;

			smc_lgr_terminate(smc->conn.lgr);

		}

	}



out:
@@ -105,8 +106,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, 
}



/* send CLC DECLINE message across internal TCP socket */

int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info,

			 u8 out_of_sync)

int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info)

{

	struct smc_clc_msg_decline dclc;

	struct msghdr msg;
@@ -118,7 +118,7 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info, 
	dclc.hdr.type = SMC_CLC_DECLINE;

	dclc.hdr.length = htons(sizeof(struct smc_clc_msg_decline));

	dclc.hdr.version = SMC_CLC_V1;

	dclc.hdr.flag = out_of_sync ? 1 : 0;

	dclc.hdr.flag = (peer_diag_info == SMC_CLC_DECL_SYNCERR) ? 1 : 0;

	memcpy(dclc.id_for_peer, local_systemid, sizeof(local_systemid));

	dclc.peer_diagnosis = htonl(peer_diag_info);

	memcpy(dclc.trl.eyecatcher, SMC_EYECATCHER, sizeof(SMC_EYECATCHER));

net/smc/smc_clc.h

+1 −2
Original line number Diff line number Diff line
@@ -106,8 +106,7 @@ struct smc_ib_device; 


int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen,

		     u8 expected_type);

int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info,

			 u8 out_of_sync);

int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info);

int smc_clc_send_proposal(struct smc_sock *smc, struct smc_ib_device *smcibdev,

			  u8 ibport);

int smc_clc_send_confirm(struct smc_sock *smc);

net/smc/smc_close.c

+15 −12
Original line number Diff line number Diff line
@@ -174,15 +174,15 @@ int smc_close_active(struct smc_sock *smc) 
{

	struct smc_cdc_conn_state_flags *txflags =

		&smc->conn.local_tx_ctrl.conn_state_flags;

	long timeout = SMC_MAX_STREAM_WAIT_TIMEOUT;

	struct smc_connection *conn = &smc->conn;

	struct sock *sk = &smc->sk;

	int old_state;

	long timeout;

	int rc = 0;



	if (sock_flag(sk, SOCK_LINGER) &&

	    !(current->flags & PF_EXITING))

		timeout = sk->sk_lingertime;

	timeout = current->flags & PF_EXITING ?

		  0 : sock_flag(sk, SOCK_LINGER) ?

		      sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;



again:

	old_state = sk->sk_state;
@@ -208,7 +208,7 @@ int smc_close_active(struct smc_sock *smc) 
	case SMC_ACTIVE:

		smc_close_stream_wait(smc, timeout);

		release_sock(sk);

		cancel_work_sync(&conn->tx_work);

		cancel_delayed_work_sync(&conn->tx_work);

		lock_sock(sk);

		if (sk->sk_state == SMC_ACTIVE) {

			/* send close request */
@@ -234,7 +234,7 @@ int smc_close_active(struct smc_sock *smc) 
		if (!smc_cdc_rxed_any_close(conn))

			smc_close_stream_wait(smc, timeout);

		release_sock(sk);

		cancel_work_sync(&conn->tx_work);

		cancel_delayed_work_sync(&conn->tx_work);

		lock_sock(sk);

		if (sk->sk_err != ECONNABORTED) {

			/* confirm close from peer */
@@ -263,7 +263,9 @@ int smc_close_active(struct smc_sock *smc) 
		/* peer sending PeerConnectionClosed will cause transition */

		break;

	case SMC_PROCESSABORT:

		cancel_work_sync(&conn->tx_work);

		release_sock(sk);

		cancel_delayed_work_sync(&conn->tx_work);

		lock_sock(sk);

		smc_close_abort(conn);

		sk->sk_state = SMC_CLOSED;

		smc_close_wait_tx_pends(smc);
@@ -411,13 +413,14 @@ void smc_close_sock_put_work(struct work_struct *work) 
int smc_close_shutdown_write(struct smc_sock *smc)

{

	struct smc_connection *conn = &smc->conn;

	long timeout = SMC_MAX_STREAM_WAIT_TIMEOUT;

	struct sock *sk = &smc->sk;

	int old_state;

	long timeout;

	int rc = 0;



	if (sock_flag(sk, SOCK_LINGER))

		timeout = sk->sk_lingertime;

	timeout = current->flags & PF_EXITING ?

		  0 : sock_flag(sk, SOCK_LINGER) ?

		      sk->sk_lingertime : SMC_MAX_STREAM_WAIT_TIMEOUT;



again:

	old_state = sk->sk_state;
@@ -425,7 +428,7 @@ int smc_close_shutdown_write(struct smc_sock *smc) 
	case SMC_ACTIVE:

		smc_close_stream_wait(smc, timeout);

		release_sock(sk);

		cancel_work_sync(&conn->tx_work);

		cancel_delayed_work_sync(&conn->tx_work);

		lock_sock(sk);

		/* send close wr request */

		rc = smc_close_wr(conn);
@@ -439,7 +442,7 @@ int smc_close_shutdown_write(struct smc_sock *smc) 
		if (!smc_cdc_rxed_any_close(conn))

			smc_close_stream_wait(smc, timeout);

		release_sock(sk);

		cancel_work_sync(&conn->tx_work);

		cancel_delayed_work_sync(&conn->tx_work);

		lock_sock(sk);

		/* confirm close from peer */

		rc = smc_close_wr(conn);