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: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -184,6 +184,37 @@ struct smc_ism_event_work {
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struct smcd_event event;
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};
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#define ISM_EVENT_REQUEST 0x0001
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#define ISM_EVENT_RESPONSE 0x0002
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#define ISM_EVENT_REQUEST_IR 0x00000001
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#define ISM_EVENT_CODE_TESTLINK 0x83
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static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
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{
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union {
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u64 info;
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struct {
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u32 uid;
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unsigned short vlanid;
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u16 code;
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};
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} ev_info;
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switch (wrk->event.code) {
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case ISM_EVENT_CODE_TESTLINK: /* Activity timer */
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ev_info.info = wrk->event.info;
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if (ev_info.code == ISM_EVENT_REQUEST) {
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ev_info.code = ISM_EVENT_RESPONSE;
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wrk->smcd->ops->signal_event(wrk->smcd,
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wrk->event.tok,
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ISM_EVENT_REQUEST_IR,
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ISM_EVENT_CODE_TESTLINK,
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ev_info.info);
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}
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break;
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}
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}
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/* worker for SMC-D events */
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static void smc_ism_event_work(struct work_struct *work)
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{
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@ -196,6 +227,9 @@ static void smc_ism_event_work(struct work_struct *work)
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break;
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case ISM_EVENT_DMB:
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break;
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case ISM_EVENT_SWR: /* Software defined event */
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smcd_handle_sw_event(wrk);
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break;
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}
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kfree(wrk);
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}
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