Looks good,
Reviewed-by: Dmitry Fomichev
On Mon, 2020-06-29 at 20:26 +0200, Klaus Jensen wrote:
> From: Klaus Jensen
>
> 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
> ---
> 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 2279d8395aaa..8a816b558eeb 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -972,6 +972,45 @@ 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];
> +} 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(_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;
> @@ -983,6 +1022,8 @@ 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""
