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19fbcb36a3
Implement TCA_VLAN_ACT_POP_ETH and TCA_VLAN_ACT_PUSH_ETH, to respectively pop and push a base Ethernet header at the beginning of a frame. POP_ETH is just a matter of pulling ETH_HLEN bytes. VLAN tags, if any, must be stripped before calling POP_ETH. PUSH_ETH is restricted to skbs with no mac_header, and only the MAC addresses can be configured. The Ethertype is automatically set from skb->protocol. These restrictions ensure that all skb's fields remain consistent, so that this action can't confuse other part of the networking stack (like GSO). Since openvswitch already had these actions, consolidate the code in skbuff.c (like for vlan and mpls push/pop). Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
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*/
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#ifndef __NET_TC_VLAN_H
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#define __NET_TC_VLAN_H
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#include <net/act_api.h>
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#include <linux/tc_act/tc_vlan.h>
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struct tcf_vlan_params {
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int tcfv_action;
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unsigned char tcfv_push_dst[ETH_ALEN];
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unsigned char tcfv_push_src[ETH_ALEN];
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u16 tcfv_push_vid;
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__be16 tcfv_push_proto;
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u8 tcfv_push_prio;
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struct rcu_head rcu;
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};
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struct tcf_vlan {
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struct tc_action common;
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struct tcf_vlan_params __rcu *vlan_p;
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};
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#define to_vlan(a) ((struct tcf_vlan *)a)
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static inline bool is_tcf_vlan(const struct tc_action *a)
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{
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#ifdef CONFIG_NET_CLS_ACT
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if (a->ops && a->ops->id == TCA_ID_VLAN)
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return true;
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#endif
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return false;
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}
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static inline u32 tcf_vlan_action(const struct tc_action *a)
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{
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u32 tcfv_action;
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rcu_read_lock();
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tcfv_action = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_action;
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rcu_read_unlock();
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return tcfv_action;
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}
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static inline u16 tcf_vlan_push_vid(const struct tc_action *a)
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{
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u16 tcfv_push_vid;
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rcu_read_lock();
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tcfv_push_vid = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_vid;
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rcu_read_unlock();
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return tcfv_push_vid;
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}
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static inline __be16 tcf_vlan_push_proto(const struct tc_action *a)
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{
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__be16 tcfv_push_proto;
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rcu_read_lock();
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tcfv_push_proto = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_proto;
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rcu_read_unlock();
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return tcfv_push_proto;
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}
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static inline u8 tcf_vlan_push_prio(const struct tc_action *a)
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{
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u8 tcfv_push_prio;
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rcu_read_lock();
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tcfv_push_prio = rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_prio;
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rcu_read_unlock();
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return tcfv_push_prio;
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}
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#endif /* __NET_TC_VLAN_H */
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