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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
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+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);
}