[PATCHv4 09/13] nvmet: implement csi identify ns

[Guixin Liu]

在 2024/11/8 03:38, Keith Busch 写道:
> From: Keith Busch <kbusch at kernel.org>
>
> Implements reporting the I/O Command Set Independent Identify Namespace
> command.
>
> Signed-off-by: Keith Busch <kbusch at kernel.org>
> ---
>   drivers/nvme/target/admin-cmd.c | 32 ++++++++++++++++++++++++++++++++
>   include/linux/nvme.h            |  1 +
>   2 files changed, 33 insertions(+)
>
> diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
> index 6d3a1d2103bf3..516af7b419189 100644
> --- a/drivers/nvme/target/admin-cmd.c
> +++ b/drivers/nvme/target/admin-cmd.c
> @@ -893,6 +893,35 @@ static void nvme_execute_identify_ns_nvm(struct nvmet_req *req)
>   	nvmet_req_complete(req, status);
>   }
>   
> +static void nvmet_execute_id_cs_indep(struct nvmet_req *req)
> +{
> +	struct nvme_id_ns_cs_indep *id;
> +	u16 status;
> +
> +	status = nvmet_req_find_ns(req);
> +	if (status)
> +		goto out;
> +
> +	id = kzalloc(sizeof(*id), GFP_KERNEL);
> +	if (!id) {
> +		status = NVME_SC_INTERNAL;
> +		goto out;
> +	}
> +
> +	id->nstat = NVME_NSTAT_NRDY;
> +	id->anagrpid = req->ns->anagrpid;

Well, I think you overlooked my comments for v3,

should use cpu_to_le32(req->ns->anagrpid) here.

Best Regards,

Guixin Liu

> +	id->nmic = NVME_NS_NMIC_SHARED;
> +	if (req->ns->readonly)
> +		id->nsattr |= NVME_NS_ATTR_RO;
> +	if (req->ns->bdev && !bdev_nonrot(req->ns->bdev))
> +		id->nsfeat |= NVME_NS_ROTATIONAL;
> +
> +	status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
> +	kfree(id);
> +out:
> +	nvmet_req_complete(req, status);
> +}
> +
>   static void nvmet_execute_identify(struct nvmet_req *req)
>   {
>   	if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE))
> @@ -940,6 +969,9 @@ static void nvmet_execute_identify(struct nvmet_req *req)
>   	case NVME_ID_CNS_NS_ACTIVE_LIST_CS:
>   		nvmet_execute_identify_nslist(req, true);
>   		return;
> +	case NVME_ID_CNS_NS_CS_INDEP:
> +		nvmet_execute_id_cs_indep(req);
> +		return;
>   	case NVME_ID_CNS_ENDGRP_LIST:
>   		nvmet_execute_identify_endgrp_list(req);
>   		return;
> diff --git a/include/linux/nvme.h b/include/linux/nvme.h
> index 93a0abfab5b0e..22375c87591a2 100644
> --- a/include/linux/nvme.h
> +++ b/include/linux/nvme.h
> @@ -563,6 +563,7 @@ enum {
>   	NVME_NS_FLBAS_LBA_SHIFT	= 1,
>   	NVME_NS_FLBAS_META_EXT	= 0x10,
>   	NVME_NS_NMIC_SHARED	= 1 << 0,
> +	NVME_NS_ROTATIONAL	= 1 << 4,
>   	NVME_LBAF_RP_BEST	= 0,
>   	NVME_LBAF_RP_BETTER	= 1,
>   	NVME_LBAF_RP_GOOD	= 2,