On Thu, Feb 24, 2011 at 5:46 PM, Greg KH <greg@xxxxxxxxx> wrote:
>>[vilius]
>> we tried to disable USB storage sticks with the following command:
>>
>> SUBSYSTEMS=="usb" DRIVERS=="usb-storage" ÂOPTIONS:="ignore_device"
>>
>> but we failed to make it work.
>
> Ignoring the device still makes it "active" in the system, especially as
> you just tested that the usb-storage device was bound to your device
> (which wouldn't be true that early in the process, which is one reason
> why this failed).
>
> you need to write a 0 to the "authorized" file in sysfs which will
> disable the whole USB device entirely if it meets your "list of devices
> to reject". ÂYou also need to test not for driver binding, which again
> will not have happened, and you don't want to have happen, but that it
> is a usb storage device type (by virtue of the correct class config
> options as shown by sysfs) and that it doesn't pass your list of valid
> serial numbers.
>
> Note, all of that might be easier to do in a script than in a udev rule
> alone, but it should be possible.
I can follow the logic, but I think I am not able to convert the
guidance to the actions.
do you mean (am not sure what is this "authorised" file in sysfs):
KERNEL!="sd[a-z][0-9]", GOTO="end_usb_key_filter"
SUBSYSTEM=="usb", ATTRS{serial}=="xx1", GOTO="end_usb_key_filter"
SUBSYSTEM=="usb", ATTRS{serial}=="xx2", GOTO="end_usb_key_filter"
SUBSYSTEM=="usb", RUN="echo 0 >/sys/xxx"
or just:
SUBSYSTEM=="usb", ATTRS{serial}=="xx1|xx2|xx3", GOTO="end_usb_key_filter"
SUBSYSTEM=="usb", RUN="echo 0 >/sys/xxx"
LABEL="end_usb_key_filter"
--
/Vilius
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