linux_dsm_epyc7002/include
Boris Sukholitko c470dd34c6 net/sched: act_vlan: Fix modify to allow 0
[ Upstream commit 9c5eee0afca09cbde6bd00f77876754aaa552970 ]

Currently vlan modification action checks existence of vlan priority by
comparing it to 0. Therefore it is impossible to modify existing vlan
tag to have priority 0.

For example, the following tc command will change the vlan id but will
not affect vlan priority:

tc filter add dev eth1 ingress matchall action vlan modify id 300 \
        priority 0 pipe mirred egress redirect dev eth2

The incoming packet on eth1:

ethertype 802.1Q (0x8100), vlan 200, p 4, ethertype IPv4

will be changed to:

ethertype 802.1Q (0x8100), vlan 300, p 4, ethertype IPv4

although the user has intended to have p == 0.

The fix is to add tcfv_push_prio_exists flag to struct tcf_vlan_params
and rely on it when deciding to set the priority.

Fixes: 45a497f2d1 (net/sched: act_vlan: Introduce TCA_VLAN_ACT_MODIFY vlan action)
Signed-off-by: Boris Sukholitko <boris.sukholitko@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-07-14 16:56:19 +02:00
..
acpi
asm-generic sched/core: Initialize the idle task with preemption disabled 2021-07-14 16:55:50 +02:00
clocksource clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG 2021-07-14 16:56:12 +02:00
crypto crypto: shash - avoid comparing pointers to exported functions under CFI 2021-07-14 16:55:54 +02:00
drm
dt-bindings
keys certs: Add EFI_CERT_X509_GUID support for dbx entries 2021-06-30 08:47:30 -04:00
kunit
kvm
linux swap: fix do_swap_page() race with swapoff 2021-07-14 16:56:13 +02:00
math-emu
media media: v4l2-async: Clean v4l2_async_notifier_add_fwnode_remote_subdev 2021-07-14 16:56:11 +02:00
memory
misc
net net/sched: act_vlan: Fix modify to allow 0 2021-07-14 16:56:19 +02:00
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