On 7/3/20 8:34 AM, Klaus Jensen wrote:
> From: Klaus Jensen <[email protected]>
>
> Since we are not providing the NGUID or EUI64 fields, we must support
> the Namespace UUID. We do not have any way of storing a persistent
> unique identifier, so conjure up a UUID that is just the namespace id.
>
> Signed-off-by: Klaus Jensen <[email protected]>
> Reviewed-by: Dmitry Fomichev <[email protected]>
> ---
> hw/block/nvme.c | 41 +++++++++++++++++++++++++++++++++++++++++
> hw/block/trace-events | 1 +
> 2 files changed, 42 insertions(+)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 8230e0e3826b..65c2fa3ac1f4 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -971,6 +971,45 @@ static uint16_t nvme_identify_nslist(NvmeCtrl *n,
> NvmeIdentify *c)
> return ret;
> }
>
> +static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c)
> +{
> + uint32_t nsid = le32_to_cpu(c->nsid);
> + uint64_t prp1 = le64_to_cpu(c->prp1);
> + uint64_t prp2 = le64_to_cpu(c->prp2);
> +
> + uint8_t list[NVME_IDENTIFY_DATA_SIZE];
> +
> + struct data {
> + struct {
> + NvmeIdNsDescr hdr;
> + uint8_t v[16];
You might consider to use QemuUUID from "qemu/uuid.h". The benefits
are you can use qemu_uuid_parse() qemu_uuid_unparse*() for tracing,
and DEFINE_PROP_UUID() in case you want to set a particular UUID
from command line, it case it is important to the guest.
> + } uuid;
> + };
> +
> + struct data *ns_descrs = (struct data *)list;
> +
> + trace_pci_nvme_identify_ns_descr_list(nsid);
> +
> + if (unlikely(nsid == 0 || nsid > n->num_namespaces)) {
> + trace_pci_nvme_err_invalid_ns(nsid, n->num_namespaces);
> + return NVME_INVALID_NSID | NVME_DNR;
> + }
> +
> + memset(list, 0x0, sizeof(list));
> +
> + /*
> + * Because the NGUID and EUI64 fields are 0 in the Identify Namespace
> data
> + * structure, a Namespace UUID (nidt = 0x3) must be reported in the
> + * Namespace Identification Descriptor. Add a very basic Namespace UUID
> + * here.
> + */
> + ns_descrs->uuid.hdr.nidt = NVME_NIDT_UUID;
> + ns_descrs->uuid.hdr.nidl = NVME_NIDT_UUID_LEN;
> + stl_be_p(&ns_descrs->uuid.v, nsid);
> +
> + return nvme_dma_read_prp(n, list, NVME_IDENTIFY_DATA_SIZE, prp1, prp2);
> +}
> +
> static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd)
> {
> NvmeIdentify *c = (NvmeIdentify *)cmd;
> @@ -982,6 +1021,8 @@ static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd)
> return nvme_identify_ctrl(n, c);
> case NVME_ID_CNS_NS_ACTIVE_LIST:
> return nvme_identify_nslist(n, c);
> + case NVME_ID_CNS_NS_DESCR_LIST:
> + return nvme_identify_ns_descr_list(n, c);
> default:
> trace_pci_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns));
> return NVME_INVALID_FIELD | NVME_DNR;
> diff --git a/hw/block/trace-events b/hw/block/trace-events
> index 4a4ef34071df..7b7303cab1dd 100644
> --- a/hw/block/trace-events
> +++ b/hw/block/trace-events
> @@ -45,6 +45,7 @@ pci_nvme_del_cq(uint16_t cqid) "deleted completion queue,
> cqid=%"PRIu16""
> pci_nvme_identify_ctrl(void) "identify controller"
> pci_nvme_identify_ns(uint32_t ns) "nsid %"PRIu32""
> pci_nvme_identify_nslist(uint32_t ns) "nsid %"PRIu32""
> +pci_nvme_identify_ns_descr_list(uint32_t ns) "nsid %"PRIu32""
> pci_nvme_get_log(uint16_t cid, uint8_t lid, uint8_t lsp, uint8_t rae,
> uint32_t len, uint64_t off) "cid %"PRIu16" lid 0x%"PRIx8" lsp 0x%"PRIx8" rae
> 0x%"PRIx8" len %"PRIu32" off %"PRIu64""
> pci_nvme_getfeat(uint16_t cid, uint8_t fid, uint8_t sel, uint32_t cdw11)
> "cid %"PRIu16" fid 0x%"PRIx8" sel 0x%"PRIx8" cdw11 0x%"PRIx32""
> pci_nvme_setfeat(uint16_t cid, uint8_t fid, uint8_t save, uint32_t cdw11)
> "cid %"PRIu16" fid 0x%"PRIx8" save 0x%"PRIx8" cdw11 0x%"PRIx32""
>
