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Commit 0d86caff authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

net/smc: send response to test link signal 



With SMC-D z/OS sends a test link signal every 10 seconds. Linux is
supposed to answer, otherwise the SMC-D connection breaks.

Signed-off-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a487711a

net/smc/smc_ism.c

+34 −0
Original line number Diff line number Diff line
@@ -184,6 +184,37 @@ struct smc_ism_event_work { 
	struct smcd_event event;

};



#define ISM_EVENT_REQUEST		0x0001

#define ISM_EVENT_RESPONSE		0x0002

#define ISM_EVENT_REQUEST_IR		0x00000001

#define ISM_EVENT_CODE_TESTLINK		0x83



static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)

{

	union {

		u64	info;

		struct {

			u32		uid;

			unsigned short	vlanid;

			u16		code;

		};

	} ev_info;



	switch (wrk->event.code) {

	case ISM_EVENT_CODE_TESTLINK:	/* Activity timer */

		ev_info.info = wrk->event.info;

		if (ev_info.code == ISM_EVENT_REQUEST) {

			ev_info.code = ISM_EVENT_RESPONSE;

			wrk->smcd->ops->signal_event(wrk->smcd,

						     wrk->event.tok,

						     ISM_EVENT_REQUEST_IR,

						     ISM_EVENT_CODE_TESTLINK,

						     ev_info.info);

			}

		break;

	}

}



/* worker for SMC-D events */

static void smc_ism_event_work(struct work_struct *work)

{
@@ -196,6 +227,9 @@ static void smc_ism_event_work(struct work_struct *work) 
		break;

	case ISM_EVENT_DMB:

		break;

	case ISM_EVENT_SWR:	/* Software defined event */

		smcd_handle_sw_event(wrk);

		break;

	}

	kfree(wrk);

}