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Wed, 18 Jul 2018 17:30:07 +0000 From: Bart Van Assche To: "gregkh@linuxfoundation.org" CC: "vinholikatti@gmail.com" , "linux-kernel@vger.kernel.org" , "asutoshd@codeaurora.org" , "sayalil@codeaurora.org" , "riteshh@codeaurora.org" , "evgreen@chromium.org" , "cang@codeaurora.org" , "martin.petersen@oracle.com" , "subhashj@codeaurora.org" , "linux-scsi@vger.kernel.org" , "vivek.gautam@codeaurora.org" , "rnayak@codeaurora.org" , "jejb@linux.vnet.ibm.com" Subject: Re: [PATCH V5 2/2] scsi: ufs: Add configfs support for ufs provisioning Thread-Topic: [PATCH V5 2/2] scsi: ufs: Add configfs support for ufs provisioning Thread-Index: AQHUFPGUXhOvLaP+Fk+rdyg77FCdGqSHMD2AgApewYCAAQWrAIAABPAAgAFUl4CAAAwCAIAAxnOAgACPZoA= Date: Wed, 18 Jul 2018 17:30:07 +0000 Message-ID: <16c8acaec092ef989ec20d0b006a434bc0de250c.camel@wdc.com> References: <1530858040-13971-1-git-send-email-sayalil@codeaurora.org> <1530858040-13971-3-git-send-email-sayalil@codeaurora.org> <0dce9e9c-4f93-9857-72ee-f65ff195c41a@codeaurora.org> <4cb931e199599314829f5ff750797c88fc123f1f.camel@wdc.com> <20180718085651.GA23599@kroah.com> In-Reply-To: <20180718085651.GA23599@kroah.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Bart.VanAssche@wdc.com; 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x-microsoft-antispam-message-info: Raio1uff3wT3CaqtXdq3bDS58Ak6rbMucg4OC6Fc/WGVmmmBjAn26xiApOuRgxCqTRkrhqgMnWz0hYfobvjxvxE5RAvJtM8VLozue71BA5IwkyVYfyr46NgA4Q5ovksK+3IlnBTByWOcQ+XkOR1YYipCgVBOvL7CUE0wkrXpLuPCFnnH7b5cMm1vEwhhXNTaropk5yf8YNZFZlEpwWoDznVK3lG5R+Q5gAXBTnr/vLm0UhEZn0jXDUO/Dv8b+VdviYkP6r7yjZX95qq6mzfyVSvghAJC7gpczAHgAMgjWXDtB3WUmV5vfD7hJVE6wCXL2rHTth41jYYuiTkyTcpDmP5cZCiRDUyNrPBU6g7Zi4Y= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="utf-7" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6f5a34e6-28bd-4b30-6aee-08d5ecd41b25 X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Jul 2018 17:30:07.3577 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR04MB0808 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2018-07-18 at 10:56 +-0200, gregkh+AEA-linuxfoundation.org wrote: +AD4- On Tue, Jul 17, 2018 at 09:06:35PM +-0000, Bart Van Assche wrote: +AD4- +AD4- On Tue, 2018-07-17 at 13:23 -0700, Evan Green wrote: +AD4- +AD4- +AD4- I'm not dead set on binary, since as above I could do it = either way, +AD4- +AD4- +AD4- but it seemed worth at least talking through. Let me know= what you +AD4- +AD4- +AD4- think. +AD4- +AD4-=20 +AD4- +AD4- The configfs documentation (Documentation/filesystems/configfs/= configfs.txt) +AD4- +AD4- is clear about this: +ACI-Preferably only one value per file sh= ould be used.+ACI- So +AD4- +AD4- I would like to hear the opinion of someone who has more author= ity than I +AD4- +AD4- with regard to configfs. +AD4-=20 +AD4- Don't we have +ACI-binary+ACI- files for configfs? We have them for = sysfs, they +AD4- are for files that are not touched by the kernel and just +ACI-pass-t= hrough+ACI- +AD4- to the hardware. Would that work here as well? If a new version of the UFS spec would be introduced and that new version o= f the spec introduces a new layout for the binary descriptor, will it be possible= for user space software to figure out which version of the binary descriptor fo= rmat that has to be used? Thanks, Bart.=