From: Parav Pandit <parav@mellanox.com>
To: Parav Pandit <parav@mellanox.com>,
"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
Jiri Pirko <jiri@mellanox.com>,
"kwankhede@nvidia.com" <kwankhede@nvidia.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"davem@davemloft.net" <davem@davemloft.net>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: RE: [PATCH 0/4] Introduce variable length mdev alias
Date: Tue, 27 Aug 2019 13:11:17 +0000 [thread overview]
Message-ID: <AM0PR05MB4866A24FF3D283F0F3CB3CDAD1A00@AM0PR05MB4866.eurprd05.prod.outlook.com> (raw)
In-Reply-To: <20190826204119.54386-1-parav@mellanox.com>
Hi Alex, Cornelia,
> -----Original Message-----
> From: kvm-owner@vger.kernel.org <kvm-owner@vger.kernel.org> On Behalf
> Of Parav Pandit
> Sent: Tuesday, August 27, 2019 2:11 AM
> To: alex.williamson@redhat.com; Jiri Pirko <jiri@mellanox.com>;
> kwankhede@nvidia.com; cohuck@redhat.com; davem@davemloft.net
> Cc: kvm@vger.kernel.org; linux-kernel@vger.kernel.org;
> netdev@vger.kernel.org; Parav Pandit <parav@mellanox.com>
> Subject: [PATCH 0/4] Introduce variable length mdev alias
>
> To have consistent naming for the netdevice of a mdev and to have consistent
> naming of the devlink port [1] of a mdev, which is formed using
> phys_port_name of the devlink port, current UUID is not usable because UUID
> is too long.
>
> UUID in string format is 36-characters long and in binary 128-bit.
> Both formats are not able to fit within 15 characters limit of netdev name.
>
> It is desired to have mdev device naming consistent using UUID.
> So that widely used user space framework such as ovs [2] can make use of
> mdev representor in similar way as PCIe SR-IOV VF and PF representors.
>
> Hence,
> (a) mdev alias is created which is derived using sha1 from the mdev name.
> (b) Vendor driver describes how long an alias should be for the child mdev
> created for a given parent.
> (c) Mdev aliases are unique at system level.
> (d) alias is created optionally whenever parent requested.
> This ensures that non networking mdev parents can function without alias
> creation overhead.
>
> This design is discussed at [3].
>
> An example systemd/udev extension will have,
>
> 1. netdev name created using mdev alias available in sysfs.
>
> mdev UUID=83b8f4f2-509f-382f-3c1e-e6bfe0fa1001
> mdev 12 character alias=cd5b146a80a5
>
> netdev name of this mdev = enmcd5b146a80a5 Here en = Ethernet link m =
> mediated device
>
> 2. devlink port phys_port_name created using mdev alias.
> devlink phys_port_name=pcd5b146a80a5
>
> This patchset enables mdev core to maintain unique alias for a mdev.
>
> Patch-1 Introduces mdev alias using sha1.
> Patch-2 Ensures that mdev alias is unique in a system.
> Patch-3 Exposes mdev alias in a sysfs hirerchy.
> Patch-4 Extends mtty driver to optionally provide alias generation.
> This also enables to test UUID based sha1 collision and trigger error handling
> for duplicate sha1 results.
>
> In future when networking driver wants to use mdev alias, mdev_alias() API will
> be added to derive devlink port name.
>
Now that majority of above patches looks in shape and I addressed all comments,
In next v1 post, I was considering to include mdev_alias() and have example use in mtty driver.
This way, subsequent series of mlx5_core who intents to use mdev_alias() API makes it easy to review and merge through Dave M, netdev tree.
Is that ok with you?
next prev parent reply other threads:[~2019-08-27 13:11 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 20:41 [PATCH 0/4] Introduce variable length mdev alias Parav Pandit
2019-08-26 20:41 ` [PATCH 1/4] mdev: Introduce sha1 based " Parav Pandit
2019-08-27 1:44 ` Alex Williamson
2019-08-27 1:51 ` Alex Williamson
2019-08-27 4:24 ` Parav Pandit
2019-08-27 10:24 ` Cornelia Huck
2019-08-27 11:12 ` Parav Pandit
2019-08-27 11:24 ` Cornelia Huck
2019-08-27 11:33 ` Parav Pandit
2019-08-27 11:41 ` Cornelia Huck
2019-08-27 11:57 ` Parav Pandit
2019-08-27 13:35 ` Cornelia Huck
2019-08-27 16:50 ` Alex Williamson
2019-08-27 11:16 ` Parav Pandit
2019-08-26 20:41 ` [PATCH 2/4] mdev: Make mdev alias unique among all mdevs Parav Pandit
2019-08-26 23:02 ` Mark Bloch
2019-08-27 4:28 ` Parav Pandit
2019-08-27 15:23 ` Alex Williamson
2019-08-27 16:16 ` Parav Pandit
2019-08-27 10:29 ` Cornelia Huck
2019-08-27 11:08 ` Parav Pandit
2019-08-27 11:29 ` Cornelia Huck
2019-08-27 15:28 ` Alex Williamson
2019-08-27 15:39 ` Cornelia Huck
2019-08-27 16:13 ` Parav Pandit
2019-08-27 16:24 ` Alex Williamson
2019-08-27 18:54 ` Parav Pandit
2019-08-26 20:41 ` [PATCH 3/4] mdev: Expose mdev alias in sysfs tree Parav Pandit
2019-08-27 1:53 ` Alex Williamson
2019-08-27 3:30 ` Parav Pandit
2019-08-27 10:47 ` Cornelia Huck
2019-08-27 11:07 ` Parav Pandit
2019-08-27 11:34 ` Cornelia Huck
2019-08-27 11:52 ` Parav Pandit
2019-08-27 11:55 ` Cornelia Huck
2019-08-27 12:00 ` Parav Pandit
2019-08-26 20:41 ` [PATCH 4/4] mtty: Optionally support mtty alias Parav Pandit
2019-08-27 13:11 ` Parav Pandit [this message]
2019-08-27 13:31 ` [PATCH 0/4] Introduce variable length mdev alias Cornelia Huck
2019-08-27 17:48 ` Alex Williamson
2019-08-27 18:11 ` Parav Pandit
2019-08-27 19:16 ` [PATCH v1 0/5] " Parav Pandit
2019-08-27 19:16 ` [PATCH v1 1/5] mdev: Introduce sha1 based " Parav Pandit
2019-08-28 21:25 ` Alex Williamson
2019-08-28 21:34 ` Alex Williamson
2019-08-29 9:07 ` Parav Pandit
2019-08-29 9:06 ` Parav Pandit
2019-08-27 19:16 ` [PATCH v1 2/5] mdev: Make mdev alias unique among all mdevs Parav Pandit
2019-08-28 21:36 ` Alex Williamson
2019-08-29 9:07 ` Parav Pandit
2019-08-27 19:16 ` [PATCH v1 3/5] mdev: Expose mdev alias in sysfs tree Parav Pandit
2019-08-27 19:16 ` [PATCH v1 4/5] mdev: Update sysfs documentation Parav Pandit
2019-08-27 19:16 ` [PATCH v1 5/5] mtty: Optionally support mtty alias Parav Pandit
2019-08-29 11:18 ` [PATCH v2 0/6] Introduce variable length mdev alias Parav Pandit
2019-08-29 11:18 ` [PATCH v2 1/6] mdev: Introduce sha1 based " Parav Pandit
2019-08-29 12:26 ` Yunsheng Lin
2019-08-30 2:27 ` Parav Pandit
2019-08-30 9:17 ` Cornelia Huck
2019-08-30 12:33 ` Parav Pandit
2019-08-30 12:39 ` Cornelia Huck
2019-08-30 12:58 ` Parav Pandit
2019-08-30 14:02 ` Cornelia Huck
2019-08-30 15:45 ` Parav Pandit
2019-09-02 14:46 ` Cornelia Huck
2019-09-03 3:47 ` Parav Pandit
2019-08-29 11:19 ` [PATCH v2 2/6] mdev: Make mdev alias unique among all mdevs Parav Pandit
2019-08-29 12:31 ` Yunsheng Lin
2019-08-30 12:40 ` Cornelia Huck
2019-08-30 12:59 ` Parav Pandit
2019-08-29 11:19 ` [PATCH v2 3/6] mdev: Expose mdev alias in sysfs tree Parav Pandit
2019-08-29 11:19 ` [PATCH v2 4/6] mdev: Introduce an API mdev_alias Parav Pandit
2019-08-29 11:19 ` [PATCH v2 5/6] mdev: Update sysfs documentation Parav Pandit
2019-08-30 12:49 ` Cornelia Huck
2019-08-30 13:10 ` Parav Pandit
2019-09-02 14:36 ` Cornelia Huck
2019-09-03 3:53 ` Parav Pandit
2019-08-29 11:19 ` [PATCH v2 6/6] mtty: Optionally support mtty alias Parav Pandit
2019-09-02 4:24 ` [PATCH v3 0/5] Introduce variable length mdev alias Parav Pandit
2019-09-02 4:24 ` [PATCH v3 1/5] mdev: Introduce sha1 based " Parav Pandit
2019-09-17 10:03 ` Cornelia Huck
2019-09-02 4:24 ` [PATCH v3 2/5] mdev: Make mdev alias unique among all mdevs Parav Pandit
2019-09-17 10:04 ` Cornelia Huck
2019-09-02 4:24 ` [PATCH v3 3/5] mdev: Expose mdev alias in sysfs tree Parav Pandit
2019-09-17 10:08 ` Cornelia Huck
2019-09-02 4:24 ` [PATCH v3 4/5] mdev: Introduce an API mdev_alias Parav Pandit
2019-09-17 10:10 ` Cornelia Huck
2019-09-02 4:24 ` [PATCH v3 5/5] mtty: Optionally support mtty alias Parav Pandit
2019-09-09 20:42 ` [PATCH v3 0/5] Introduce variable length mdev alias Parav Pandit
2019-09-11 13:56 ` Alex Williamson
2019-09-11 15:30 ` Parav Pandit
2019-09-11 16:29 ` Cornelia Huck
2019-09-11 16:38 ` Parav Pandit
2019-09-13 21:32 ` Alex Williamson
2019-09-13 23:19 ` Parav Pandit
2019-09-17 10:13 ` Cornelia Huck
2019-09-18 17:15 ` Parav Pandit
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=AM0PR05MB4866A24FF3D283F0F3CB3CDAD1A00@AM0PR05MB4866.eurprd05.prod.outlook.com \
--to=parav@mellanox.com \
--cc=alex.williamson@redhat.com \
--cc=cohuck@redhat.com \
--cc=davem@davemloft.net \
--cc=jiri@mellanox.com \
--cc=kvm@vger.kernel.org \
--cc=kwankhede@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).