Re: udevadm monitor and atapi dvdrw

[Franco Martelli <martellif67@gmail.com>]

Il 22/11/2012 20:08, Kay Sievers ha scritto:
> On Wed, Nov 21, 2012 at 4:55 PM, Franco Martelli<martellif67@gmail.com>  wrote:
>> Hi everybody,
>>
>> I'm using Debian Sqeeze 6.0, kernel 2.6.32, udev version 164.
>> With kernel provided from debian my dvdrw is under scsi subsystem and
>> udevadm monitor recognize optical disk change with a lot of info output
>> suitable to write rules.
>> I've recompilated the kernel and things has changed, now my dvdrw is under
>> ide/atapi subsystem and the device name is hdc now.
>> I'd like to write a rule that remove udf and crc_itu_t modules as soon as
>> optical disk is left off from dvdrw drive. Example:
>>
>> SUBSYSTEM="block", KERNEL="hdc", ACTION="change", RUN+="/sbin/rmmod udf
>> crc_itu_t"
>>
>> I look athttp://reactivated.net/writing_udev_rules.html  but doesn't help
>> for ide devices ACTION="change".
>> Could anybody help me to write such a rule?
> Modern userspace and kernel facilities like media change polling do
> not support all the old and deprecated IDE drivers. The IDE drivers
> are just not capable to do what you are looking for. Udev does not
> support IDE drivers at all, only libata.
>
> You might just want to disable the IDE drivers in the kernel config
> and use the libata ones. Ideally the kernel would just delete the IDE
> stuff.
>
> Kay
>
solved. :-)
I've build the kernel using /boot/config-2.6.32-5-amd64 as reference, 
that is the .config of the kernel provided from Debian. I checked line 
by line libata and scsi targets and with make menuconfig I excluded "< > 
ATA/ATAPI/MFM/RLL support  --->" and I apply new configuration as you 
suggest.
So the rule that do the work is:

SUBSYSTEM="scsi", ENV{SDEV_MEDIA_CHANGE}="1", ACTION="change", 
RUN+="/sbin/rmmod udf crc_itu_t"

I don't know if it's the right way to unload modules no more needed but 
it works.

bye,

-- 
                                         Franco Martelli.