Nikolay Aleksandrov 02fff96a79 net: add support for netdev notifier error injection ... This module allows to insert errors in some of netdevice's notifier events. All network drivers use these notifiers to signal various events and to check if they are allowed, e.g. PRECHANGEMTU and CHANGEMTU afterwards. Until recently I had to run failure tests by injecting a custom module, but now this infrastructure makes it trivial to test these failure paths. Some of the recent bugs I fixed were found using this module. Here's an example: $ cd /sys/kernel/debug/notifier-error-inject/netdev $ echo -22 > actions/NETDEV_CHANGEMTU/error $ ip link set eth0 mtu 1024 RTNETLINK answers: Invalid argument CC: Akinobu Mita <akinobu.mita@gmail.com> CC: "David S. Miller" <davem@davemloft.net> CC: netdev <netdev@vger.kernel.org> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2015-12-01 15:31:57 -05:00
..
fault-injection.txt	futex: Fault/error injection capabilities	2015-07-20 11:45:45 +02:00
notifier-error-inject.txt	net: add support for netdev notifier error injection	2015-12-01 15:31:57 -05:00
provoke-crashes.txt	lkdtm: add debugfs access and loosen KPROBE ties	2010-03-06 11:26:32 -08:00