[PATCH 0/5] UBI: make UBI devices dynamic

Artem Bityutskiy dedekind at infradead.org
Wed Dec 19 10:41:37 EST 2007


here is a patchset which makes UBI devices dynamic. This means,
that you may attach/detach MTD devices runtime, not just when
UBI module is loaded/unloaded. This is very convinient - you do
may compile UBI into the kernel and attach/detach needed MTD
devices later, when your init scripts (loaded from initrd) decide
which exactly MTD device(s) to attach. This also makes testing
a lot easier.

The idea is similar to what the device mapper has: UBI creates
an UBI control device, which registers itself in UBI sysfs
hierarchy (/sys/class/ubi/ubi_ctrl) with dynamically allocated
major and minor numbers. The control device has 2 ioctls -
attach MTD device and detach MTD device.

This patchset applies on top of my other UBI changes and fixes,
which you may find in the UBI git.

I CC Frank and Andreas, as one of the main UBI users. I CC
Arnd as an ioctl expert.

Best regards,
Artem Bityutskiy (Битюцкий Артём)

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