Martin Schiller a4989fa911 net/lapb: support netdev events ... This patch allows layer2 (LAPB) to react to netdev events itself and avoids the detour via layer3 (X.25). 1. Establish layer2 on NETDEV_UP events, if the carrier is already up. 2. Call lapb_disconnect_request() on NETDEV_GOING_DOWN events to signal the peer that the connection will go down. (Only when the carrier is up.) 3. When a NETDEV_DOWN event occur, clear all queues, enter state LAPB_STATE_0 and stop all timers. 4. The NETDEV_CHANGE event makes it possible to handle carrier loss and detection. In case of Carrier Loss, clear all queues, enter state LAPB_STATE_0 and stop all timers. In case of Carrier Detection, we start timer t1 on a DCE interface, and on a DTE interface we change to state LAPB_STATE_1 and start sending SABM(E). Signed-off-by: Martin Schiller <ms@dev.tdt.de> Acked-by: Xie He <xie.he.0141@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2020-11-27 17:22:51 -08:00
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Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
lapb_iface.c	net/lapb: support netdev events	2020-11-27 17:22:51 -08:00
lapb_in.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
lapb_out.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
lapb_subr.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
lapb_timer.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41	2019-05-24 17:27:12 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00