Sabrina Dubroca af7d6cce53 net: ipv4: update fnhe_pmtu when first hop's MTU changes ... Since commit 5aad1de5ea ("ipv4: use separate genid for next hop exceptions"), exceptions get deprecated separately from cached routes. In particular, administrative changes don't clear PMTU anymore. As Stefano described in commit e9fa1495d7 ("ipv6: Reflect MTU changes on PMTU of exceptions for MTU-less routes"), the PMTU discovered before the local MTU change can become stale: - if the local MTU is now lower than the PMTU, that PMTU is now incorrect - if the local MTU was the lowest value in the path, and is increased, we might discover a higher PMTU Similarly to what commit e9fa1495d7 did for IPv6, update PMTU in those cases. If the exception was locked, the discovered PMTU was smaller than the minimal accepted PMTU. In that case, if the new local MTU is smaller than the current PMTU, let PMTU discovery figure out if locking of the exception is still needed. To do this, we need to know the old link MTU in the NETDEV_CHANGEMTU notifier. By the time the notifier is called, dev->mtu has been changed. This patch adds the old MTU as additional information in the notifier structure, and a new call_netdevice_notifiers_u32() function. Fixes: 5aad1de5ea ("ipv4: use separate genid for next hop exceptions") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-10-10 22:44:46 -07:00
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acpi
asm-generic	asm-generic: io: Fix ioport_map() for !CONFIG_GENERIC_IOMAP && CONFIG_INDIRECT_PIO	2018-09-14 09:49:21 +01:00
clocksource
crypto
drm	drm/cma-helper: Fix crash in fbdev error path	2018-10-02 13:03:34 +02:00
dt-bindings	ARM: SoC: late updates	2018-08-25 14:12:36 -07:00
keys
kvm
linux	net: ipv4: update fnhe_pmtu when first hop's MTU changes	2018-10-10 22:44:46 -07:00
math-emu
media	media: v4l: event: Prevent freeing event subscriptions while accessed	2018-10-03 06:32:51 -04:00
memory
misc
net	net: ipv4: update fnhe_pmtu when first hop's MTU changes	2018-10-10 22:44:46 -07:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
ras
rdma	Second merge window update	2018-08-23 15:34:48 -07:00
scsi	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
soc
sound	ASoC: Fixes for v4.19	2018-09-17 18:59:21 +02:00
target
trace	RxRPC fixes	2018-10-10 22:27:38 -07:00
uapi	RxRPC fixes	2018-10-10 22:27:38 -07:00
video	fbdev changes for v4.19:	2018-08-23 15:44:58 -07:00
xen	xen/balloon: add runtime control for scrubbing ballooned out pages	2018-09-14 08:51:10 -04:00