CODEWITHSUNDEEP
linuxlinux-kernelsystem-callskernel-modulefile-descriptor
PinkPR
PinkPR

Reputation: 355

Closing file descriptor while performing ioctl

I'm writing a Linux Kernel Module, and my userland app is looping on a parallel ioctl call (to get info from the kernel module). But when I want to close the file descriptor (linked to my kernel module), the release function is not executed until the ioctl function has not exited.

I can't find anything on why it behaves like that. Do you have an idea on why it happens, and how I can avoid this blocking ? I'd basically like to have my ioctl and close functions being executed simultaneously in my kernel module.

Thank you ! :)

Upvotes: 1

Views: 1203

Answers (1)

Tsyvarev
Tsyvarev

Reputation: 66118

I'd basically like to have my ioctl and close functions being executed simultaneously in my kernel module.

You cannot.

Calling .release() method means that the file object isn't used anymore. So it cannot be executed while ioctl for given file is in progress.

Upvotes: 1

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