Greg, On Thu, 22 Feb 2018 08:56 +0100, Greg KH <greg@kroah.com> wrote:
On Wed, Feb 21, 2018 at 03:36:44PM -0800, Alexander Ivanov wrote:
Hi All,
I have udev rule defined on a
DEVPATH="/dev/mydev0",..., ACTION="remove", ..., RUN+="/path/to/script"
When does /path/to/script is executed in respect to module's remove() and exit() ?
A module's lifecycle is different from a device's lifecycle, right?
Sure. However, in this particular case, only one device for the module can exist and user-land calls insmod/rmmod, Thus, on rmmod both device's remove() and module's exit() are getting called.
There is no remove() call for a module, only for a driver subsystem, so be careful as to what exactly you are referring to here.
Hopefully, all devices "owned" by the module should be removed from the kernel before the module is unloaded, so that should help you out here.
Also note that modules are never automatically unloaded, so that is never a normal operation in the system.
what exactly are you trying to do here with your udev script?
On action=="remove", I'd like to call device's close(), it was open()ed by action=="add" It looks like device is removed before RUN gets a chance to execute.. Basically, I need to start reading from device as soon as it appears in the system, and stop it right before it get removed. thanks, --Alex
thanks,
greg k-h
_______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
-- Alexander Ivanov amivanov@fastmail.com