Re: [PATCH] Standard rules for AoE devices.

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Kay Sievers wrote:
On Tue, Dec 9, 2008 at 04:07, Ryan Thomas <ryan@xxxxxxxxxx> wrote:
Kay Sievers wrote:
On Tue, Dec 9, 2008 at 01:49, Marco d'Itri <md@xxxxxxxx> wrote:
On Dec 09, Ryan Thomas <ryan@xxxxxxxxxx> wrote:

In the interest of standardizing udev rules, please consider the
following patch that adds udev rules for the ATA over Ethernet character
and block devices.  The aoe module has been a long-time member of the
kernel and needs inclusion in the standard udev rules.
Debian so far has used these rules which are more generic and much
simpler. Are they incorrect in some way?

# AOE character devices
SUBSYSTEM=="aoe",               NAME="etherd/%k"

SUBSYSTEM=="aoe",               MODE="0220",    GROUP="disk"
SUBSYSTEM=="aoe", KERNEL=="err", MODE="0440",   GROUP="disk"
That looks fine.

I wonder why we have this comment:
 +# aoe block devices
 +SUBSYSTEM=="aoe", KERNEL=="etherd*",    NAME="%k", GROUP="disk"

They can not be block devices if they have SUBSYSTEM=="aoe". Do the
etherd* devices belong into the subdir or not?

We have:
 SUBSYSTEM=="aoe", NAME="etherd/%k", GROUP="disk"
in the current default rules.

I guess doing:
 # ATA over Ethernet
 SUBSYSTEM=="aoe", NAME="etherd/%k", GROUP="disk", MODE="0220"
 SUBSYSTEM=="aoe", KERNEL=="err", MODE="0440"
would be all we need.

My previous patch should be backed out as you are right that it's not
needed.

A patch to the default rules to correct the mode on the etherd/err character
device is all that is needed.

Applied. Please check:
  http://git.kernel.org/?p=linux/hotplug/udev.git;a=commitdiff;h=2fc635fb67dbd509f4ee532c8bf0d3885cc71989

The block device are never moved to the subdir, they all just stay in
/dev, right?


The block device does go in the subdir. The kernel name for the block device is "etherd!eX.Y" which means that the subdir is automatically taken care of.

Ryan
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