Am 07.09.2010 04:04, schrieb ext Christoph Hellwig:
On Mon, Sep 06, 2010 at 05:39:00PM +0200, Alexander Graf wrote:
On 06.09.2010, at 17:06, Bernhard Kohl wrote:
From: Bernhard Kohl<bernhard.k...@gmx.net>
Allow symbolic links which point to /dev/sgX devices.
Couldn't you send an SG_IO test ioctl over and see if it works? I really
dislike the whole file name magic matching.
You could, but the result would not be what you expect, given that every
/dev/sd* device and more in Linux support it.
What we really need is to stop shoe-horning scsi pass through support
into the block layer. Once we finally get our generic thread offload
facilily there is no need for it anymore at all, scsi-generic can
simplify offload the SG_IO ioctl and be done with it. I even have an
old prototype for this, just waiting for the generic thread offload
to get merged before resurrecting it.
Wouldn't it be OK to apply this patch in the meantime before we get
this complete new solution? I need to handle about 15 /dev/sg* disks
which are randomly numbered. With this patch I can use the udev
generated links in /dev/disk/by*, which makes life much easier.
