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nvmf: split Identify command into functions for readability

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Change-Id: I912e98e9e06e149365c425b1729bb8fcb6dc2887
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
This commit is contained in:
Daniel Verkamp 2016-08-26 10:05:48 -07:00
parent bc86133ecc
commit a74ca147bb
1 changed files with 77 additions and 71 deletions
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148
lib/nvmf/virtual.c
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@ -139,34 +139,6 @@ nvmf_virtual_ctrlr_complete_cmd(spdk_event_t event)
spdk_bdev_free_io(bdev_io);
}
static int
nvmf_virtual_ctrlr_admin_identify_nslist(struct spdk_nvmf_controller *ctrlr,
struct spdk_nvmf_request *req)
{
struct spdk_nvme_ns_list *ns_list;
struct spdk_nvme_cmd *cmd = &req->cmd->nvme_cmd;
uint32_t req_ns_id = cmd->nsid;
uint32_t i, num_ns, count = 0;
if (req_ns_id >= 0xfffffffeUL) {
return -1;
}
memset(req->data, 0, req->length);
num_ns = ctrlr->dev.virtual.ns_count;
ns_list = (struct spdk_nvme_ns_list *)req->data;
for (i = 1; i <= num_ns; i++) {
if (i <= req_ns_id) {
continue;
}
ns_list->ns_list[count++] = i;
if (count == sizeof(*ns_list) / sizeof(uint32_t)) {
break;
}
}
return 0;
}
static int
nvmf_virtual_ctrlr_get_log_page(struct spdk_nvmf_request *req)
{
@ -190,62 +162,96 @@ nvmf_virtual_ctrlr_get_log_page(struct spdk_nvmf_request *req)
}
}
static int
identify_ns(struct spdk_nvmf_controller *ctrlr,
struct spdk_nvme_cmd *cmd,
struct spdk_nvme_cpl *rsp,
struct spdk_nvme_ns_data *nsdata)
{
struct spdk_bdev *bdev;
if (cmd->nsid > ctrlr->dev.virtual.ns_count || cmd->nsid == 0) {
SPDK_ERRLOG("Identify Namespace for invalid NSID %u\n", cmd->nsid);
rsp->status.sc = SPDK_NVME_SC_INVALID_NAMESPACE_OR_FORMAT;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
bdev = ctrlr->dev.virtual.ns_list[cmd->nsid - 1];
nsdata->nsze = bdev->blockcnt;
nsdata->ncap = bdev->blockcnt;
nsdata->nuse = bdev->blockcnt;
nsdata->nlbaf = 0;
nsdata->flbas.format = 0;
nsdata->lbaf[0].lbads = nvmf_u32log2(bdev->blocklen);
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
static int
identify_ctrlr(struct nvmf_session *session, struct spdk_nvme_ctrlr_data *cdata)
{
*cdata = session->vcdata;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
static int
identify_active_ns_list(struct spdk_nvmf_controller *ctrlr,
struct spdk_nvme_cmd *cmd,
struct spdk_nvme_cpl *rsp,
struct spdk_nvme_ns_list *ns_list)
{
uint32_t i, num_ns, count = 0;
if (cmd->nsid >= 0xfffffffeUL) {
SPDK_ERRLOG("Identify Active Namespace List with invalid NSID %u\n", cmd->nsid);
rsp->status.sc = SPDK_NVME_SC_INVALID_NAMESPACE_OR_FORMAT;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
num_ns = ctrlr->dev.virtual.ns_count;
for (i = 1; i <= num_ns; i++) {
if (i <= cmd->nsid) {
continue;
}
ns_list->ns_list[count++] = i;
if (count == sizeof(*ns_list) / sizeof(uint32_t)) {
break;
}
}
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
static int
nvmf_virtual_ctrlr_identify(struct spdk_nvmf_request *req)
{
uint32_t nsid;
uint32_t blen;
uint32_t shift = 0;
int rc = 0;
struct spdk_nvme_ns_data *nsdata;
uint8_t cns;
struct nvmf_session *session = req->conn->sess;
struct spdk_nvme_cmd *cmd = &req->cmd->nvme_cmd;
struct spdk_nvme_cpl *response = &req->rsp->nvme_cpl;
struct spdk_nvme_cpl *rsp = &req->rsp->nvme_cpl;
struct spdk_nvmf_subsystem *subsystem = session->subsys;
if (req->data == NULL || req->length < 4096) {
SPDK_ERRLOG("identify command with invalid buffer\n");
response->status.sc = SPDK_NVME_SC_INVALID_FIELD;
rsp->status.sc = SPDK_NVME_SC_INVALID_FIELD;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
if ((cmd->cdw10 & 0xFF) == SPDK_NVME_IDENTIFY_NS) {
nsid = cmd->nsid;
if (nsid > subsystem->ctrlr.dev.virtual.ns_count || nsid == 0) {
SPDK_ERRLOG("Unsuccessful query for nsid %u\n", cmd->nsid);
response->status.sc = SPDK_NVME_SC_INVALID_NAMESPACE_OR_FORMAT;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
memset(req->data, 0, req->length);
nsdata = (struct spdk_nvme_ns_data *)req->data;
memset(nsdata, 0, sizeof(*nsdata));
nsdata->nsze = subsystem->ctrlr.dev.virtual.ns_list[nsid - 1]->blockcnt;
nsdata->ncap = subsystem->ctrlr.dev.virtual.ns_list[nsid - 1]->blockcnt;
nsdata->nuse = subsystem->ctrlr.dev.virtual.ns_list[nsid - 1]->blockcnt;
nsdata->nlbaf = 0;
nsdata->flbas.format = 0;
nsdata->flbas.extended = 0;
nsdata->nmic.can_share = 1;
blen = subsystem->ctrlr.dev.virtual.ns_list[nsid - 1]->blocklen;
shift = nvmf_u32log2(blen);
nsdata->lbaf[0].lbads = shift;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
} else if ((cmd->cdw10 & 0xFF) == SPDK_NVME_IDENTIFY_CTRLR) {
SPDK_TRACELOG(SPDK_TRACE_NVMF, "Identify Controller\n");
/* pull from virtual controller context */
memcpy(req->data, &session->vcdata, sizeof(struct spdk_nvme_ctrlr_data));
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
} else if ((cmd->cdw10 & 0xFF) == SPDK_NVME_IDENTIFY_ACTIVE_NS_LIST) {
rc = nvmf_virtual_ctrlr_admin_identify_nslist(&subsystem->ctrlr, req);
if (rc < 0) {
SPDK_ERRLOG("Invalid Namespace or Format\n");
response->status.sc = SPDK_NVME_SC_INVALID_NAMESPACE_OR_FORMAT;
}
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
} else {
SPDK_ERRLOG("identify command with invalid code\n");
response->status.sc = SPDK_NVME_SC_INVALID_NAMESPACE_OR_FORMAT;
cns = cmd->cdw10 & 0xFF;
switch (cns) {
case SPDK_NVME_IDENTIFY_NS:
return identify_ns(&subsystem->ctrlr, cmd, rsp, req->data);
case SPDK_NVME_IDENTIFY_CTRLR:
return identify_ctrlr(session, req->data);
case SPDK_NVME_IDENTIFY_ACTIVE_NS_LIST:
return identify_active_ns_list(&subsystem->ctrlr, cmd, rsp, req->data);
default:
SPDK_ERRLOG("Identify command with unsupported CNS 0x%02x\n", cns);
rsp->status.sc = SPDK_NVME_SC_INVALID_FIELD;
return SPDK_NVMF_REQUEST_EXEC_STATUS_COMPLETE;
}
}