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nvmf/ctrlr: save AER commands ID

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When doing live migration we need to restore the AER commands
in the destination VM, so here to provide an API to save
these CIDs and the transport layer can save the value.

After migration in destination VM, we should allocate
new AER requests based on CIDs in vfio-user.

Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10040 (master)

(cherry picked from commit 13f7510f1a)
Change-Id: I5881f833bbfacb0f030a2b135b4dd47726240378
Signed-off-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11276
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
This commit is contained in:
Changpeng Liu 2021-10-28 18:02:32 +08:00 committed by Tomasz Zawadzki
parent b9d2367fc3
commit 0e97fa53d9
2 changed files with 21 additions and 0 deletions
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19
lib/nvmf/ctrlr.c
View File

@ -1903,6 +1903,25 @@ nvmf_ctrlr_set_features_number_of_queues(struct spdk_nvmf_request *req)
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
int
nvmf_ctrlr_save_aers(struct spdk_nvmf_ctrlr *ctrlr, uint16_t *aer_cids,
uint16_t max_aers)
{
struct spdk_nvmf_request *req;
uint16_t i;
if (!aer_cids || max_aers < ctrlr->nr_aer_reqs) {
return -EINVAL;
}
for (i = 0; i < ctrlr->nr_aer_reqs; i++) {
req = ctrlr->aer_req[i];
aer_cids[i] = req->cmd->nvme_cmd.cid;
}
return ctrlr->nr_aer_reqs;
}
static int
nvmf_ctrlr_set_features_async_event_configuration(struct spdk_nvmf_request *req)
{

2
lib/nvmf/nvmf_internal.h
View File

@ -449,6 +449,8 @@ void nvmf_ctrlr_reservation_notice_log(struct spdk_nvmf_ctrlr *ctrlr,
* the host to send a subsequent AER.
*/
void nvmf_ctrlr_abort_aer(struct spdk_nvmf_ctrlr *ctrlr);
int nvmf_ctrlr_save_aers(struct spdk_nvmf_ctrlr *ctrlr, uint16_t *aer_cids,
uint16_t max_aers);
/*
* Abort zero-copy requests that already got the buffer (received zcopy_start cb), but haven't