Commit 4c082221 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'net-smc-next' 



Ursula Braun says:

====================
net/smc: patches 2020-02-17

here are patches for SMC making termination tasks more perfect.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 790a9a7c 5613f20c

net/smc/smc_clc.c

+1 −1
Original line number Diff line number Diff line
@@ -349,7 +349,7 @@ int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, 
		smc->peer_diagnosis = ntohl(dclc->peer_diagnosis);

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

			smc->conn.lgr->sync_err = 1;

			smc_lgr_terminate(smc->conn.lgr, true);

			smc_lgr_terminate_sched(smc->conn.lgr);

		}

	}

net/smc/smc_core.c

+11 −15
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ static DECLARE_WAIT_QUEUE_HEAD(lgrs_deleted); 


static void smc_buf_free(struct smc_link_group *lgr, bool is_rmb,

			 struct smc_buf_desc *buf_desc);

static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft);



/* return head of link group list and its lock for a given link group */

static inline struct list_head *smc_lgr_list_head(struct smc_link_group *lgr,
@@ -229,7 +230,7 @@ static void smc_lgr_terminate_work(struct work_struct *work) 
	struct smc_link_group *lgr = container_of(work, struct smc_link_group,

						  terminate_work);



	smc_lgr_terminate(lgr, true);

	__smc_lgr_terminate(lgr, true);

}



/* create a new SMC link group */
@@ -576,15 +577,15 @@ static void smc_lgr_cleanup(struct smc_link_group *lgr) 
	} else {

		struct smc_link *lnk = &lgr->lnk[SMC_SINGLE_LINK];



		wake_up(&lnk->wr_reg_wait);

		if (lnk->state != SMC_LNK_INACTIVE) {

			smc_link_send_delete(lnk, false);

		if (lnk->state != SMC_LNK_INACTIVE)

			smc_llc_link_inactive(lnk);

	}

}

}



/* terminate link group */

/* terminate link group

 * @soft: true if link group shutdown can take its time

 *	  false if immediate link group shutdown is required

 */

static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft)

{

	struct smc_connection *conn;
@@ -622,25 +623,20 @@ static void __smc_lgr_terminate(struct smc_link_group *lgr, bool soft) 
		smc_lgr_free(lgr);

}



/* unlink and terminate link group

 * @soft: true if link group shutdown can take its time

 *	  false if immediate link group shutdown is required

 */

void smc_lgr_terminate(struct smc_link_group *lgr, bool soft)

/* unlink link group and schedule termination */

void smc_lgr_terminate_sched(struct smc_link_group *lgr)

{

	spinlock_t *lgr_lock;



	smc_lgr_list_head(lgr, &lgr_lock);

	spin_lock_bh(lgr_lock);

	if (lgr->terminating) {

	if (list_empty(&lgr->list) || lgr->terminating || lgr->freeing) {

		spin_unlock_bh(lgr_lock);

		return;	/* lgr already terminating */

	}

	if (!soft)

		lgr->freeing = 1;

	list_del_init(&lgr->list);

	spin_unlock_bh(lgr_lock);

	__smc_lgr_terminate(lgr, soft);

	schedule_work(&lgr->terminate_work);

}



/* Called when IB port is terminated */

net/smc/smc_core.h

+1 −7
Original line number Diff line number Diff line
@@ -285,18 +285,12 @@ static inline struct smc_connection *smc_lgr_find_conn( 
	return res;

}



static inline void smc_lgr_terminate_sched(struct smc_link_group *lgr)

{

	if (!lgr->terminating && !lgr->freeing)

		schedule_work(&lgr->terminate_work);

}



struct smc_sock;

struct smc_clc_msg_accept_confirm;

struct smc_clc_msg_local;



void smc_lgr_forget(struct smc_link_group *lgr);

void smc_lgr_terminate(struct smc_link_group *lgr, bool soft);

void smc_lgr_terminate_sched(struct smc_link_group *lgr);

void smc_port_terminate(struct smc_ib_device *smcibdev, u8 ibport);

void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,

			unsigned short vlan);

net/smc/smc_ib.c

+29 −15
Original line number Diff line number Diff line
@@ -257,6 +257,7 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler, 
					struct ib_event *ibevent)

{

	struct smc_ib_device *smcibdev;

	bool schedule = false;

	u8 port_idx;



	smcibdev = container_of(handler, struct smc_ib_device, event_handler);
@@ -266,22 +267,35 @@ static void smc_ib_global_event_handler(struct ib_event_handler *handler, 
		/* terminate all ports on device */

		for (port_idx = 0; port_idx < SMC_MAX_PORTS; port_idx++) {

			set_bit(port_idx, &smcibdev->port_event_mask);

			set_bit(port_idx, smcibdev->ports_going_away);

			if (!test_and_set_bit(port_idx,

					      smcibdev->ports_going_away))

				schedule = true;

		}

		if (schedule)

			schedule_work(&smcibdev->port_event_work);

		break;

	case IB_EVENT_PORT_ERR:

	case IB_EVENT_PORT_ACTIVE:

		port_idx = ibevent->element.port_num - 1;

		if (port_idx >= SMC_MAX_PORTS)

			break;

		set_bit(port_idx, &smcibdev->port_event_mask);

		if (test_and_clear_bit(port_idx, smcibdev->ports_going_away))

			schedule_work(&smcibdev->port_event_work);

		break;

	case IB_EVENT_PORT_ERR:

		port_idx = ibevent->element.port_num - 1;

		if (port_idx >= SMC_MAX_PORTS)

			break;

		set_bit(port_idx, &smcibdev->port_event_mask);

		if (!test_and_set_bit(port_idx, smcibdev->ports_going_away))

			schedule_work(&smcibdev->port_event_work);

		break;

	case IB_EVENT_GID_CHANGE:

		port_idx = ibevent->element.port_num - 1;

		if (port_idx < SMC_MAX_PORTS) {

		if (port_idx >= SMC_MAX_PORTS)

			break;

		set_bit(port_idx, &smcibdev->port_event_mask);

			if (ibevent->event == IB_EVENT_PORT_ERR)

				set_bit(port_idx, smcibdev->ports_going_away);

			else if (ibevent->event == IB_EVENT_PORT_ACTIVE)

				clear_bit(port_idx, smcibdev->ports_going_away);

		schedule_work(&smcibdev->port_event_work);

		}

		break;

	default:

		break;
@@ -316,11 +330,11 @@ static void smc_ib_qp_event_handler(struct ib_event *ibevent, void *priv) 
	case IB_EVENT_QP_FATAL:

	case IB_EVENT_QP_ACCESS_ERR:

		port_idx = ibevent->element.qp->port - 1;

		if (port_idx < SMC_MAX_PORTS) {

		if (port_idx >= SMC_MAX_PORTS)

			break;

		set_bit(port_idx, &smcibdev->port_event_mask);

			set_bit(port_idx, smcibdev->ports_going_away);

		if (!test_and_set_bit(port_idx, smcibdev->ports_going_away))

			schedule_work(&smcibdev->port_event_work);

		}

		break;

	default:

		break;

net/smc/smc_llc.c

+1 −1
Original line number Diff line number Diff line
@@ -614,7 +614,7 @@ static void smc_llc_testlink_work(struct work_struct *work) 
	rc = wait_for_completion_interruptible_timeout(&link->llc_testlink_resp,

						       SMC_LLC_WAIT_TIME);

	if (rc <= 0) {

		smc_lgr_terminate(smc_get_lgr(link), true);

		smc_lgr_terminate_sched(smc_get_lgr(link));

		return;

	}

	next_interval = link->llc_testlink_time;

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