udevadm monitor and atapi dvdrw

[Franco Martelli]

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 at http://reactivated.net/writing_udev_rules.html but doesn't
help for ide devices ACTION=="change".
Could anybody help me to write such a rule?

bye,

[Kay Sievers]

Post by Franco Martelli
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
SUBSYSTEM=="block", KERNEL=="hdc", ACTION=="change", RUN+="/sbin/rmmod udf
crc_itu_t"
I look at http://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
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[Franco Martelli]

Post by Kay Sievers

Post by Franco Martelli
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
SUBSYSTEM=="block", KERNEL=="hdc", ACTION=="change", RUN+="/sbin/rmmod udf
crc_itu_t"
I look at http://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

Thank you very much Kay,
does libata work as a kernel module only or can be statically included
into the kernel? My lsmod output is:

# lsmod
Module Size Used by
vboxpci 11426 0
vboxnetadp 17099 0
vboxnetflt 13500 0
vboxdrv 1754521 3 vboxpci,vboxnetadp,vboxnetflt

that are Virtual Box modules. I've included into the kernel usb, sound,
network, sata, ide, and other devices support. Modules are ppp, usb
specific drivers, lp ... and others but not libata. Maybe should I
looking for a more recent, backported to sqeeze linux kernel?

bye,

[Franco Martelli]

Post by Kay Sievers

Post by Franco Martelli
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
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,