linux/include/net/tcx.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2023 Isovalent */
#ifndef __NET_TCX_H
#define __NET_TCX_H

#include <linux/bpf.h>
#include <linux/bpf_mprog.h>

#include <net/sch_generic.h>

struct mini_Qdisc;

struct tcx_entry { … };

struct tcx_link { … };

static inline void tcx_set_ingress(struct sk_buff *skb, bool ingress)
{ … }

#ifdef CONFIG_NET_XGRESS
static inline struct tcx_entry *tcx_entry(struct bpf_mprog_entry *entry)
{ … }

static inline struct tcx_link *tcx_link(const struct bpf_link *link)
{ … }

void tcx_inc(void);
void tcx_dec(void);

static inline void tcx_entry_sync(void)
{ … }

static inline void
tcx_entry_update(struct net_device *dev, struct bpf_mprog_entry *entry,
		 bool ingress)
{ … }

static inline struct bpf_mprog_entry *
tcx_entry_fetch(struct net_device *dev, bool ingress)
{ … }

static inline struct bpf_mprog_entry *tcx_entry_create_noprof(void)
{ … }
#define tcx_entry_create(...) …

static inline void tcx_entry_free(struct bpf_mprog_entry *entry)
{ … }

static inline struct bpf_mprog_entry *
tcx_entry_fetch_or_create(struct net_device *dev, bool ingress, bool *created)
{ … }

static inline void tcx_skeys_inc(bool ingress)
{ … }

static inline void tcx_skeys_dec(bool ingress)
{ … }

static inline void tcx_miniq_inc(struct bpf_mprog_entry *entry)
{ … }

static inline void tcx_miniq_dec(struct bpf_mprog_entry *entry)
{ … }

static inline bool tcx_entry_is_active(struct bpf_mprog_entry *entry)
{ … }

static inline enum tcx_action_base tcx_action_code(struct sk_buff *skb,
						   int code)
{ … }
#endif /* CONFIG_NET_XGRESS */

#if defined(CONFIG_NET_XGRESS) && defined(CONFIG_BPF_SYSCALL)
int tcx_prog_attach(const union bpf_attr *attr, struct bpf_prog *prog);
int tcx_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
int tcx_prog_detach(const union bpf_attr *attr, struct bpf_prog *prog);
void tcx_uninstall(struct net_device *dev, bool ingress);

int tcx_prog_query(const union bpf_attr *attr,
		   union bpf_attr __user *uattr);

static inline void dev_tcx_uninstall(struct net_device *dev)
{ … }
#else
static inline int tcx_prog_attach(const union bpf_attr *attr,
				  struct bpf_prog *prog)
{
	return -EINVAL;
}

static inline int tcx_link_attach(const union bpf_attr *attr,
				  struct bpf_prog *prog)
{
	return -EINVAL;
}

static inline int tcx_prog_detach(const union bpf_attr *attr,
				  struct bpf_prog *prog)
{
	return -EINVAL;
}

static inline int tcx_prog_query(const union bpf_attr *attr,
				 union bpf_attr __user *uattr)
{
	return -EINVAL;
}

static inline void dev_tcx_uninstall(struct net_device *dev)
{
}
#endif /* CONFIG_NET_XGRESS && CONFIG_BPF_SYSCALL */
#endif /* __NET_TCX_H */