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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>
This commit is contained in:
Ursula Braun 2018-08-10 17:45:11 +02:00 committed by David S. Miller
parent a487711aac
commit 0d86caff06
1 changed files with 34 additions and 0 deletions
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34
net/smc/smc_ism.c
View File

@ -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);
}