netdev - Re: [RFC PATCH v5 02/27] nvme-fabrics: Move NVMF_ALLOWED_OPTS and NVMF_REQUIRED

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Date:   Fri, 21 May 2021 12:08:52 -0500
From:   Himanshu Madhani <himanshu.madhani@...cle.com>
To:     Shai Malin <smalin@...vell.com>, netdev@...r.kernel.org,
        linux-nvme@...ts.infradead.org, davem@...emloft.net,
        kuba@...nel.org, sagi@...mberg.me, hch@....de, axboe@...com,
        kbusch@...nel.org
Cc:     aelior@...vell.com, mkalderon@...vell.com, okulkarni@...vell.com,
        pkushwaha@...vell.com, malin1024@...il.com,
        Arie Gershberg <agershberg@...vell.com>
Subject: Re: [RFC PATCH v5 02/27] nvme-fabrics: Move NVMF_ALLOWED_OPTS and
 NVMF_REQUIRED_OPTS definitions



On 5/19/21 6:13 AM, Shai Malin wrote:
> From: Arie Gershberg <agershberg@...vell.com>
> 
> Move NVMF_ALLOWED_OPTS and NVMF_REQUIRED_OPTS definitions
> to header file, so it can be used by the different HW devices.
> 
> NVMeTCP offload devices might have different limitations of the
> allowed options, for example, a device that does not support all the
> queue types. With tcp and rdma, only the nvme-tcp and nvme-rdma layers
> handle those attributes and the HW devices do not create any limitations
> for the allowed options.
> 
> An alternative design could be to add separate fields in nvme_tcp_ofld_ops
> such as max_hw_sectors and max_segments that we already have in this
> series.
> 
> Acked-by: Igor Russkikh <irusskikh@...vell.com>
> Signed-off-by: Arie Gershberg <agershberg@...vell.com>
> Signed-off-by: Prabhakar Kushwaha <pkushwaha@...vell.com>
> Signed-off-by: Omkar Kulkarni <okulkarni@...vell.com>
> Signed-off-by: Michal Kalderon <mkalderon@...vell.com>
> Signed-off-by: Ariel Elior <aelior@...vell.com>
> Signed-off-by: Shai Malin <smalin@...vell.com>
> ---
>   drivers/nvme/host/fabrics.c | 7 -------
>   drivers/nvme/host/fabrics.h | 7 +++++++
>   2 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
> index a2bb7fc63a73..e1e05aa2fada 100644
> --- a/drivers/nvme/host/fabrics.c
> +++ b/drivers/nvme/host/fabrics.c
> @@ -942,13 +942,6 @@ void nvmf_free_options(struct nvmf_ctrl_options *opts)
>   }
>   EXPORT_SYMBOL_GPL(nvmf_free_options);
>   
> -#define NVMF_REQUIRED_OPTS	(NVMF_OPT_TRANSPORT | NVMF_OPT_NQN)
> -#define NVMF_ALLOWED_OPTS	(NVMF_OPT_QUEUE_SIZE | NVMF_OPT_NR_IO_QUEUES | \
> -				 NVMF_OPT_KATO | NVMF_OPT_HOSTNQN | \
> -				 NVMF_OPT_HOST_ID | NVMF_OPT_DUP_CONNECT |\
> -				 NVMF_OPT_DISABLE_SQFLOW |\
> -				 NVMF_OPT_FAIL_FAST_TMO)
> -
>   static struct nvme_ctrl *
>   nvmf_create_ctrl(struct device *dev, const char *buf)
>   {
> diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
> index d7f7974dc208..ce7fe3a842b1 100644
> --- a/drivers/nvme/host/fabrics.h
> +++ b/drivers/nvme/host/fabrics.h
> @@ -68,6 +68,13 @@ enum {
>   	NVMF_OPT_FAIL_FAST_TMO	= 1 << 20,
>   };
>   
> +#define NVMF_REQUIRED_OPTS	(NVMF_OPT_TRANSPORT | NVMF_OPT_NQN)
> +#define NVMF_ALLOWED_OPTS	(NVMF_OPT_QUEUE_SIZE | NVMF_OPT_NR_IO_QUEUES | \
> +				 NVMF_OPT_KATO | NVMF_OPT_HOSTNQN | \
> +				 NVMF_OPT_HOST_ID | NVMF_OPT_DUP_CONNECT |\
> +				 NVMF_OPT_DISABLE_SQFLOW |\
> +				 NVMF_OPT_FAIL_FAST_TMO)
> +
>   /**
>    * struct nvmf_ctrl_options - Used to hold the options specified
>    *			      with the parsing opts enum.
> 

Reviewed-by: Himanshu Madhani <himanshu.madhani@...cle.com>

-- 
Himanshu Madhani                                Oracle Linux Engineering