• Pete Zaitcev's avatar
    USB: add binary API to usbmon · 6f23ee1f
    Pete Zaitcev authored
    This patch adds a new, "binary" API in addition to the old, text API usbmon
    had before. The new API allows for less CPU use, and it allows to capture
    all data from a packet where old API only captured 32 bytes at most. There
    are some limitations and conditions to this, e.g. in case someone constructs
    a URB with 1GB of data, it's not likely to be captured, because even the
    huge buffers of the new reader are finite. Nonetheless, I expect this new
    capability to capture all data for all real life scenarios.
    The downside is, a special user mode application is required where cat(1)
    worked before. I have sample code at http://people.redhat.com/zaitcev/linux/
    and Paolo Abeni is working on patching libpcap.
    This patch was initially written by Paolo and later I tweaked it, and
    we had a little back-and-forth. So this is a jointly authored patch, but
    I am submitting this I am responsible for the bugs.
    Signed-off-by: default avatarPaolo Abeni <paolo.abeni@email.it>
    Signed-off-by: default avatarPete Zaitcev <zaitcev@redhat.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
mon_bin.c 27.6 KB