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nvme_rdma: add a timeout for spinning on cm events.

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Previously we would just sit forever. preventing us from properly
attempting reconnects and timing out.

Change-Id: Id7386ab95cf75fd9ac972b44afa2719aad412f49
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/469021
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Seth Howell 2019-09-20 10:27:32 -07:00 committed by Jim Harris
parent 37152dc56d
commit 13fb1b690e
1 changed files with 12 additions and 1 deletions
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13
lib/nvme/nvme_rdma.c
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@ -69,6 +69,9 @@
/* number of STAILQ entries for holding pending RDMA CM events. */
#define NVME_RDMA_NUM_CM_EVENTS 256
/* CM event processing timeout */
#define NVME_RDMA_QPAIR_CM_EVENT_TIMEOUT_US 100000
struct spdk_nvmf_cmd {
struct spdk_nvme_cmd cmd;
struct spdk_nvme_sgl_descriptor sgl[NVME_RDMA_MAX_SGL_DESCRIPTORS];
@ -353,6 +356,7 @@ nvme_rdma_process_event(struct nvme_rdma_qpair *rqpair,
enum rdma_cm_event_type evt)
{
struct nvme_rdma_ctrlr *rctrlr;
uint64_t timeout_ticks;
int rc = 0, rc2;
if (rqpair->evt != NULL) {
@ -362,9 +366,12 @@ nvme_rdma_process_event(struct nvme_rdma_qpair *rqpair,
}
}
timeout_ticks = (NVME_RDMA_QPAIR_CM_EVENT_TIMEOUT_US * spdk_get_ticks_hz()) / SPDK_SEC_TO_USEC +
spdk_get_ticks();
rctrlr = nvme_rdma_ctrlr(rqpair->qpair.ctrlr);
assert(rctrlr != NULL);
while (!rqpair->evt && !rc) {
while (!rqpair->evt && spdk_get_ticks() < timeout_ticks && rc == 0) {
rc = nvme_rdma_poll_events(rctrlr);
}
@ -372,6 +379,10 @@ nvme_rdma_process_event(struct nvme_rdma_qpair *rqpair,
return rc;
}
if (rqpair->evt == NULL) {
return -EADDRNOTAVAIL;
}
if (rqpair->evt->event != evt) {
SPDK_ERRLOG("Expected %s but received %s (%d) from CM event channel (status = %d)\n",
nvme_rdma_cm_event_str_get(evt),