From: Keith Busch <kbusch@kernel.org> To: Niklas Cassel <Niklas.Cassel@wdc.com> Cc: "javier@javigon.com" <javier@javigon.com>, "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>, "sagi@grimberg.me" <sagi@grimberg.me>, "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>, "minwoo.im.dev@gmail.com" <minwoo.im.dev@gmail.com>, "Javier González" <javier.gonz@samsung.com>, "hch@lst.de" <hch@lst.de> Subject: Re: [PATCH V6 1/2] nvme: enable char device per namespace Date: Fri, 26 Mar 2021 00:14:33 +0900 [thread overview] Message-ID: <20210325151433.GA31394@redsun51.ssa.fujisawa.hgst.com> (raw) In-Reply-To: <YFyBM1qq+AmYQvdl@x1-carbon.lan> On Thu, Mar 25, 2021 at 12:25:24PM +0000, Niklas Cassel wrote: > On Mon, Mar 01, 2021 at 08:24:51PM +0100, javier@javigon.com wrote: > > From: Javier González <javier.gonz@samsung.com> > > > > Create a char device per NVMe namespace. This char device is always > > initialized, independently of whether the features implemented by the > > device are supported by the kernel. User-space can therefore always > > issue IOCTLs to the NVMe driver using the char device. > > > > The char device is presented as /dev/nvme-generic-XcYnZ. This naming > > scheme follows the convention of the hidden device (nvmeXcYnZ). Support > > for multipath will follow. > > Do we perhaps want to put these new character devices inside a subdir? > e.g. /dev/nvme/nvme-generic-XcYnZ ? I actually suggested the same hierarchy, but that was rejected. > Otherwise it feels like doing such a simple thing as ls -al /dev/nvme* > will show a lot of devices because of these new specialized char devices.
WARNING: multiple messages have this Message-ID (diff)
From: Keith Busch <kbusch@kernel.org> To: Niklas Cassel <Niklas.Cassel@wdc.com> Cc: "javier@javigon.com" <javier@javigon.com>, "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>, "sagi@grimberg.me" <sagi@grimberg.me>, "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>, "minwoo.im.dev@gmail.com" <minwoo.im.dev@gmail.com>, "Javier González" <javier.gonz@samsung.com>, "hch@lst.de" <hch@lst.de> Subject: Re: [PATCH V6 1/2] nvme: enable char device per namespace Date: Fri, 26 Mar 2021 00:14:33 +0900 [thread overview] Message-ID: <20210325151433.GA31394@redsun51.ssa.fujisawa.hgst.com> (raw) In-Reply-To: <YFyBM1qq+AmYQvdl@x1-carbon.lan> On Thu, Mar 25, 2021 at 12:25:24PM +0000, Niklas Cassel wrote: > On Mon, Mar 01, 2021 at 08:24:51PM +0100, javier@javigon.com wrote: > > From: Javier González <javier.gonz@samsung.com> > > > > Create a char device per NVMe namespace. This char device is always > > initialized, independently of whether the features implemented by the > > device are supported by the kernel. User-space can therefore always > > issue IOCTLs to the NVMe driver using the char device. > > > > The char device is presented as /dev/nvme-generic-XcYnZ. This naming > > scheme follows the convention of the hidden device (nvmeXcYnZ). Support > > for multipath will follow. > > Do we perhaps want to put these new character devices inside a subdir? > e.g. /dev/nvme/nvme-generic-XcYnZ ? I actually suggested the same hierarchy, but that was rejected. > Otherwise it feels like doing such a simple thing as ls -al /dev/nvme* > will show a lot of devices because of these new specialized char devices. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2021-03-25 15:15 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-01 19:24 [PATCH V6 0/2] nvme: enable char device per namespace javier 2021-03-01 19:24 ` javier 2021-03-01 19:24 ` [PATCH V6 1/2] " javier 2021-03-01 19:24 ` javier 2021-03-03 9:10 ` Christoph Hellwig 2021-03-03 9:10 ` Christoph Hellwig 2021-03-03 10:02 ` Javier González 2021-03-03 10:02 ` Javier González 2021-03-09 11:31 ` Christoph Hellwig 2021-03-09 11:31 ` Christoph Hellwig 2021-03-09 12:42 ` Javier González 2021-03-09 12:42 ` Javier González 2021-03-09 15:05 ` Christoph Hellwig 2021-03-09 15:05 ` Christoph Hellwig 2021-03-09 21:18 ` Javier González 2021-03-09 21:18 ` Javier González 2021-03-24 12:29 ` Niklas Cassel 2021-03-24 12:29 ` Niklas Cassel 2021-03-25 2:09 ` Minwoo Im 2021-03-25 2:09 ` Minwoo Im 2021-03-25 8:26 ` hch 2021-03-25 8:26 ` hch 2021-03-25 8:39 ` Niklas Cassel 2021-03-25 8:39 ` Niklas Cassel 2021-03-25 9:34 ` Minwoo Im 2021-03-25 9:34 ` Minwoo Im 2021-03-25 12:25 ` Niklas Cassel 2021-03-25 12:25 ` Niklas Cassel 2021-03-25 12:33 ` Minwoo Im 2021-03-25 12:33 ` Minwoo Im 2021-03-25 15:14 ` Keith Busch [this message] 2021-03-25 15:14 ` Keith Busch 2021-03-01 19:24 ` [PATCH V6 2/2] nvme: allow open for nvme-generic char device javier 2021-03-01 19:24 ` javier
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