From: Tom Parkin Date: Thu, 10 Dec 2020 15:50:58 +0000 (+0000) Subject: docs: update ppp_generic.rst to document new ioctls X-Git-Tag: howlett/maple_spf/20210104~359^2~35^2 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=563b603bd65db452edd66f44f66823ce6fe40a0d;p=users%2Fjedix%2Flinux-maple.git docs: update ppp_generic.rst to document new ioctls Add documentation of the newly-added PPPIOCBRIDGECHAN and PPPIOCUNBRIDGECHAN ioctls. Signed-off-by: Tom Parkin Signed-off-by: David S. Miller --- diff --git a/Documentation/networking/ppp_generic.rst b/Documentation/networking/ppp_generic.rst index e60504377900..5a10abce5964 100644 --- a/Documentation/networking/ppp_generic.rst +++ b/Documentation/networking/ppp_generic.rst @@ -314,6 +314,22 @@ channel are: it is connected to. It will return an EINVAL error if the channel is not connected to an interface. +* PPPIOCBRIDGECHAN bridges a channel with another. The argument should + point to an int containing the channel number of the channel to bridge + to. Once two channels are bridged, frames presented to one channel by + ppp_input() are passed to the bridge instance for onward transmission. + This allows frames to be switched from one channel into another: for + example, to pass PPPoE frames into a PPPoL2TP session. Since channel + bridging interrupts the normal ppp_input() path, a given channel may + not be part of a bridge at the same time as being part of a unit. + This ioctl will return an EALREADY error if the channel is already + part of a bridge or unit, or ENXIO if the requested channel does not + exist. + +* PPPIOCUNBRIDGECHAN performs the inverse of PPPIOCBRIDGECHAN, unbridging + a channel pair. This ioctl will return an EINVAL error if the channel + does not form part of a bridge. + * All other ioctl commands are passed to the channel ioctl() function. The ioctl calls that are available on an instance that is attached to