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% Registration The usbmon: USB monitoring framework
% [2]Register/Submit Proposal Pete Zaitcev (zaitcev@redhat.com)
For years, Linux developers used \ident{printk()} to
debug the USB stack, but this approach has
serious limitations. In this paper we discuss
``usbmon,'' a recently developed facility to
snoop USB traffic in a more efficient way than
can be done with \ident{printk()}.
From far away, usbmon is a very
straightforward piece of code. It consists of
circular buffers which are filled with records
by hooks into the USB stack, and a thin glue
to the user code which fetches these records.
The devil, however, is in details. Also the
user mode tools play a role.
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