• Hans de Goede's avatar
    virt: vbox: Fix VBGL_IOCTL_VMMDEV_REQUEST_BIG and _LOG req numbers to match upstream · f794db68
    Hans de Goede authored
    Until this commit the mainline kernel version (this version) of the
    vboxguest module contained a bug where it defined
    VBGL_IOCTL_VMMDEV_REQUEST_BIG and VBGL_IOCTL_LOG using
    _IOC(_IOC_READ | _IOC_WRITE, 'V', ...) instead of
    _IO(V, ...) as the out of tree VirtualBox upstream version does.
    
    Since the VirtualBox userspace bits are always built against VirtualBox
    upstream's headers, this means that so far the mainline kernel version
    of the vboxguest module has been failing these 2 ioctls with -ENOTTY.
    I guess that VBGL_IOCTL_VMMDEV_REQUEST_BIG is never used causing us to
    not hit that one and sofar the vboxguest driver has failed to actually
    log any log messages passed it through VBGL_IOCTL_LOG.
    
    This commit changes the VBGL_IOCTL_VMMDEV_REQUEST_BIG and VBGL_IOCTL_LOG
    defines to match the out of tree VirtualBox upstream vboxguest version,
    while keeping compatibility with the old wrong request defines so as
    to not break the kernel ABI in case someone has been using the old
    request defines.
    
    Fixes: f6ddd094 ("virt: Add vboxguest driver for Virtual Box Guest integration UAPI")
    Cc: stable@vger.kernel.org
    Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
    Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Link: https://lore.kernel.org/r/20200709120858.63928-2-hdegoede@redhat.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    f794db68
vboxguest_core.h 6.56 KB