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lkl_linux/include/net/tc_wrapper.h
Jamal Hadi Salim 8c710f7525 net/sched: Retire tcindex classifier 
The tcindex classifier has served us well for about a quarter of a century
but has not been getting much TLC due to lack of known users. Most recently
it has become easy prey to syzkaller. For this reason, we are retiring it.

Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2023-02-16 09:27:07 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_TC_WRAPPER_H
#define __NET_TC_WRAPPER_H
#include <net/pkt_cls.h>
#if IS_ENABLED(CONFIG_RETPOLINE)
#include <linux/cpufeature.h>
#include <linux/static_key.h>
#include <linux/indirect_call_wrapper.h>
#define TC_INDIRECT_SCOPE
extern struct static_key_false tc_skip_wrapper;
/* TC Actions */
#ifdef CONFIG_NET_CLS_ACT
#define TC_INDIRECT_ACTION_DECLARE(fname) \
INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
const struct tc_action *a, \
struct tcf_result *res))
TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act);
TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act);
TC_INDIRECT_ACTION_DECLARE(tcf_csum_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ct_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act);
TC_INDIRECT_ACTION_DECLARE(tcf_gact_act);
TC_INDIRECT_ACTION_DECLARE(tcf_gate_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ife_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act);
TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act);
TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act);
TC_INDIRECT_ACTION_DECLARE(tcf_nat_act);
TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act);
TC_INDIRECT_ACTION_DECLARE(tcf_police_act);
TC_INDIRECT_ACTION_DECLARE(tcf_sample_act);
TC_INDIRECT_ACTION_DECLARE(tcf_simp_act);
TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act);
TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act);
TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act);
TC_INDIRECT_ACTION_DECLARE(tunnel_key_act);
static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
{
if (static_branch_likely(&tc_skip_wrapper))
goto skip;
#if IS_BUILTIN(CONFIG_NET_ACT_GACT)
if (a->ops->act == tcf_gact_act)
return tcf_gact_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_MIRRED)
if (a->ops->act == tcf_mirred_act)
return tcf_mirred_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_PEDIT)
if (a->ops->act == tcf_pedit_act)
return tcf_pedit_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT)
if (a->ops->act == tcf_skbedit_act)
return tcf_skbedit_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD)
if (a->ops->act == tcf_skbmod_act)
return tcf_skbmod_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_POLICE)
if (a->ops->act == tcf_police_act)
return tcf_police_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_BPF)
if (a->ops->act == tcf_bpf_act)
return tcf_bpf_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK)
if (a->ops->act == tcf_connmark_act)
return tcf_connmark_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CSUM)
if (a->ops->act == tcf_csum_act)
return tcf_csum_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CT)
if (a->ops->act == tcf_ct_act)
return tcf_ct_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CTINFO)
if (a->ops->act == tcf_ctinfo_act)
return tcf_ctinfo_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_GATE)
if (a->ops->act == tcf_gate_act)
return tcf_gate_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_MPLS)
if (a->ops->act == tcf_mpls_act)
return tcf_mpls_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_NAT)
if (a->ops->act == tcf_nat_act)
return tcf_nat_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY)
if (a->ops->act == tunnel_key_act)
return tunnel_key_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_VLAN)
if (a->ops->act == tcf_vlan_act)
return tcf_vlan_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_IFE)
if (a->ops->act == tcf_ife_act)
return tcf_ife_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_IPT)
if (a->ops->act == tcf_ipt_act)
return tcf_ipt_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SIMP)
if (a->ops->act == tcf_simp_act)
return tcf_simp_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE)
if (a->ops->act == tcf_sample_act)
return tcf_sample_act(skb, a, res);
#endif
skip:
return a->ops->act(skb, a, res);
}
#endif /* CONFIG_NET_CLS_ACT */
/* TC Filters */
#ifdef CONFIG_NET_CLS
#define TC_INDIRECT_FILTER_DECLARE(fname) \
INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
const struct tcf_proto *tp, \
struct tcf_result *res))
TC_INDIRECT_FILTER_DECLARE(basic_classify);
TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify);
TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify);
TC_INDIRECT_FILTER_DECLARE(fl_classify);
TC_INDIRECT_FILTER_DECLARE(flow_classify);
TC_INDIRECT_FILTER_DECLARE(fw_classify);
TC_INDIRECT_FILTER_DECLARE(mall_classify);
TC_INDIRECT_FILTER_DECLARE(route4_classify);
TC_INDIRECT_FILTER_DECLARE(rsvp_classify);
TC_INDIRECT_FILTER_DECLARE(rsvp6_classify);
TC_INDIRECT_FILTER_DECLARE(u32_classify);
static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
if (static_branch_likely(&tc_skip_wrapper))
goto skip;
#if IS_BUILTIN(CONFIG_NET_CLS_BPF)
if (tp->classify == cls_bpf_classify)
return cls_bpf_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_U32)
if (tp->classify == u32_classify)
return u32_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_FLOWER)
if (tp->classify == fl_classify)
return fl_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_FW)
if (tp->classify == fw_classify)
return fw_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL)
if (tp->classify == mall_classify)
return mall_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_BASIC)
if (tp->classify == basic_classify)
return basic_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
if (tp->classify == cls_cgroup_classify)
return cls_cgroup_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_FLOW)
if (tp->classify == flow_classify)
return flow_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4)
if (tp->classify == route4_classify)
return route4_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_RSVP)
if (tp->classify == rsvp_classify)
return rsvp_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_RSVP6)
if (tp->classify == rsvp6_classify)
return rsvp6_classify(skb, tp, res);
#endif
skip:
return tp->classify(skb, tp, res);
}
#endif /* CONFIG_NET_CLS */
static inline void tc_wrapper_init(void)
{
#ifdef CONFIG_X86
if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE))
static_branch_enable(&tc_skip_wrapper);
#endif
}
#else
#define TC_INDIRECT_SCOPE static
static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
{
return a->ops->act(skb, a, res);
}
static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
return tp->classify(skb, tp, res);
}
static inline void tc_wrapper_init(void)
{
}
#endif
#endif /* __NET_TC_WRAPPER_H */
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