linux-kernel - Re: [PATCH V6] scsi: ufs: Add configfs support for UFS provisioning

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Date:   Mon, 16 Jul 2018 14:02:52 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "vinholikatti@...il.com" <vinholikatti@...il.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "sayalil@...eaurora.org" <sayalil@...eaurora.org>,
        "riteshh@...eaurora.org" <riteshh@...eaurora.org>,
        "evgreen@...omium.org" <evgreen@...omium.org>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "subhashj@...eaurora.org" <subhashj@...eaurora.org>,
        "vivek.gautam@...eaurora.org" <vivek.gautam@...eaurora.org>,
        "rnayak@...eaurora.org" <rnayak@...eaurora.org>,
        "jejb@...ux.vnet.ibm.com" <jejb@...ux.vnet.ibm.com>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V6] scsi: ufs: Add configfs support for UFS provisioning

On Mon, 2018-07-16 at 15:13 +0530, Sayali Lokhande wrote:
> +		This file shows the current ufs configuration descriptor set in device.
> +		This can be used to provision ufs device if bConfigDescrLock is 0.
> +		For more details, refer 14.1.6.3 Configuration Descriptor and
> +		Table 14-12 - Unit Descriptor configurable parameters from specs for
> +		description of each configuration descriptor parameter.
> +		Configuration descriptor buffer needs to be passed in space separated
> +		format specificied as below:
> +		echo <bLength> <bDescriptorIDN> <bConfDescContinue> <bBootEnable>
> +		<bDescrAccessEn> <bInitPowerMode> <bHighPriorityLUN>
> +		<bSecureRemovalType> <bInitActiveICCLevel> <wPeriodicRTCUpdate>
> +		<0Bh:0Fh_ReservedAs_0> <bLUEnable> <bBootLunID> <bLUWriteProtect>
> +		<bMemoryType> <dNumAllocUnits> <bDataReliability> <bLogicalBlockSize>
> +		<bProvisioningType> <wContextCapabilities> <0Dh:0Fh_ReservedAs_0>
> +		> /config/XXXX.ufshc/ufs_provision

I think the person who suggested to use configfs expected you to create one configfs
attribute per value instead of writing a long list of values into a single configfs
attribute.

Bart.