TCA_VLAN_ACT_MODIFY allows one to change an existing tag.
It accepts same attributes as TCA_VLAN_ACT_PUSH (protocol, id,
priority).
If packet is vlan tagged, then the tag gets overwritten according to
user specified attributes.
For example, this allows user to replace a tag's vid while preserving
its priority bits (as opposed to "action vlan pop pipe action vlan push").
Shmulik Ladkani (2):
net: skbuff: Export __skb_vlan_pop
net/sched: act_vlan: Introduce TCA_VLAN_ACT_MODIFY vlan action
include/linux/skbuff.h | 1 +
include/uapi/linux/tc_act/tc_vlan.h | 1 +
net/core/skbuff.c | 7 +++++--
net/sched/act_vlan.c | 29 ++++++++++++++++++++++++++++-
4 files changed, 35 insertions(+), 3 deletions(-)
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2.7.4