add rules for new aoe character devices

The patch below adds support for new aoe driver character "flush" and "revalidate" devices to the existing aoe rules in udev-117.

The current aoe driver version in the Linux kernel does not include the "flush" feature, but I have already submitted patches to the LKML adding that support and am now working on updating those patches for resubmission. Those using the aoe driver on the Coraid website already have the "flush" feature.

Quoted 8 lines · Ed L. Cashin

The patch below adds support for new aoe driver character "flush" and "revalidate" devices to the existing aoe rules in udev-117.

The current aoe driver version in the Linux kernel does not include the "flush" feature, but I have already submitted patches to the LKML adding that support and am now working on updating those patches for resubmission. Those using the aoe driver on the Coraid website already have the "flush" feature.

The distro rules are just a copy from the distro packages and changes made here will not get into the packages. We can add the rules only to the "default" rules.

Does this rule work for you? It should move all nodes into a subdir:
SUBSYSTEM="aoe", NAME="etherd/%k"

Quoted 10 lines · Kay Sievers

Quoted 8 lines · Ed L. Cashin

The patch below adds support for new aoe driver character "flush" and "revalidate" devices to the existing aoe rules in udev-117.

The current aoe driver version in the Linux kernel does not include the "flush" feature, but I have already submitted patches to the LKML adding that support and am now working on updating those patches for resubmission. Those using the aoe driver on the Coraid website already have the "flush" feature.

Quoted 3 lines

The distro rules are just a copy from the distro packages and changes made here will not get into the packages. We can add the rules only to the "default" rules.

Ah. Thank you.

Quoted 2 lines

Does this rule work for you? It should move all nodes into a subdir:
SUBSYSTEM="aoe", NAME="etherd/%k"

Yes, that's good for the block devices. In the past it seems that rule doesn't guarantee the creation of the character device nodes, though, and that is why there is a separate rule for each character node in the patch I sent. I haven't checked yet whether the latest udev and kernel still behave the same way.

Quoted 17 lines · Ed L. Cashin

Quoted 10 lines · Kay Sievers

Quoted 8 lines · Ed L. Cashin

The patch below adds support for new aoe driver character "flush" and "revalidate" devices to the existing aoe rules in udev-117.

The current aoe driver version in the Linux kernel does not include the "flush" feature, but I have already submitted patches to the LKML adding that support and am now working on updating those patches for resubmission. Those using the aoe driver on the Coraid website already have the "flush" feature.

Quoted 3 lines

The distro rules are just a copy from the distro packages and changes made here will not get into the packages. We can add the rules only to the "default" rules.

Ah. Thank you.

Quoted 8 lines

Quoted 2 lines

Does this rule work for you? It should move all nodes into a subdir:
SUBSYSTEM="aoe", NAME="etherd/%k"

Yes, that's good for the block devices. In the past it seems that rule doesn't guarantee the creation of the character device nodes, though, and that is why there is a separate rule for each character node in the patch I sent. I haven't checked yet whether the latest udev and kernel still behave the same way.

Block devices always have SUBSYSTEM="block", this will only handle the char devices. You want the block devices to be in a subdir?

Kay

Quoted 1 line · Ed L. Cashin

On Mon, Dec 03, 2007 at 07:15:03PM +0100, Kay Sievers wrote:

Quoted 8 lines

Quoted 2 lines

Does this rule work for you? It should move all nodes into a subdir:
SUBSYSTEM="aoe", NAME="etherd/%k"

Yes, that's good for the block devices. In the past it seems that rule doesn't guarantee the creation of the character device nodes, though, and that is why there is a separate rule for each character node in the patch I sent. I haven't checked yet whether the latest udev and kernel still behave the same way.

Block devices always have SUBSYSTEM="block", this will only handle the char devices. You want the block devices to be in a subdir?

Quoted 2 lines · Kay Sievers

Quoted 1 line · Ed L. Cashin

On Mon, Dec 03, 2007 at 07:15:03PM +0100, Kay Sievers wrote:

...

Quoted 11 lines

Quoted 8 lines

Quoted 2 lines

Does this rule work for you? It should move all nodes into a subdir:
SUBSYSTEM="aoe", NAME="etherd/%k"

Yes, that's good for the block devices. In the past it seems that rule doesn't guarantee the creation of the character device nodes, though, and that is why there is a separate rule for each character node in the patch I sent. I haven't checked yet whether the latest udev and kernel still behave the same way.

Block devices always have SUBSYSTEM="block", this will only handle the char devices. You want the block devices to be in a subdir?

Yes, the normal arrangement is for the "etherd" subdirectory in /dev to contain the character and block devices for the aoe driver. It looks like,

  ecashin@ellijay:~$ ls -l /dev/etherd 
  total 0
  c-w--w---- 1 root disk 152,  3 Dec  7 16:24 discover
  brw-rw---- 1 root disk 152, 16 Dec  7 17:02 e7.0
  brw-rw---- 1 root disk 152,  0 Dec  7 17:02 e7.1
  cr--r----- 1 root disk 152,  2 Dec  7 16:24 err
  c-w--w---- 1 root disk 152,  6 Dec  7 16:24 flush
  c-w--w---- 1 root disk 152,  4 Dec  7 16:24 interfaces
  c-w--w---- 1 root disk 152,  5 Dec  7 16:24 revalidate
  ecashin@ellijay:~$ 

(The block device minor numbers are different for this aoe6-55 driver than they would be for earlier versions. This aoe6-55 driver relies on udev and assigns minor numbers dynamically. Older drivers can't do that, and so have a more limited range of possible AoE shelf and slot addresses.)

I see, the block device nodes have the "etherd/" prefix in the kernel, so they don't need a udev rule to move them there. The name in sysfs has a '!', like "/sys/block/etherd!e7.0/", right?