linux/include/uapi/linux/filter.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Linux Socket Filter Data Structures
 */

#ifndef _UAPI__LINUX_FILTER_H__
#define _UAPI__LINUX_FILTER_H__

#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/bpf_common.h>

/*
 * Current version of the filter code architecture.
 */
#define BPF_MAJOR_VERSION …
#define BPF_MINOR_VERSION …

/*
 *	Try and keep these values and structures similar to BSD, especially
 *	the BPF code definitions which need to match so you can share filters
 */
 
struct sock_filter { … };

struct sock_fprog { … };

/* ret - BPF_K and BPF_X also apply */
#define BPF_RVAL(code) …
#define BPF_A …

/* misc */
#define BPF_MISCOP(code) …
#define BPF_TAX …
#define BPF_TXA …

/*
 * Macros for filter block array initializers.
 */
#ifndef BPF_STMT
#define BPF_STMT(code, k) …
#endif
#ifndef BPF_JUMP
#define BPF_JUMP(code, k, jt, jf) …
#endif

/*
 * Number of scratch memory words for: BPF_ST and BPF_STX
 */
#define BPF_MEMWORDS …

/* RATIONALE. Negative offsets are invalid in BPF.
   We use them to reference ancillary data.
   Unlike introduction new instructions, it does not break
   existing compilers/optimizers.
 */
#define SKF_AD_OFF …
#define SKF_AD_PROTOCOL …
#define SKF_AD_PKTTYPE …
#define SKF_AD_IFINDEX …
#define SKF_AD_NLATTR …
#define SKF_AD_NLATTR_NEST …
#define SKF_AD_MARK …
#define SKF_AD_QUEUE …
#define SKF_AD_HATYPE …
#define SKF_AD_RXHASH …
#define SKF_AD_CPU …
#define SKF_AD_ALU_XOR_X …
#define SKF_AD_VLAN_TAG …
#define SKF_AD_VLAN_TAG_PRESENT …
#define SKF_AD_PAY_OFFSET …
#define SKF_AD_RANDOM …
#define SKF_AD_VLAN_TPID …
#define SKF_AD_MAX …

#define SKF_NET_OFF …
#define SKF_LL_OFF …

#define BPF_NET_OFF …
#define BPF_LL_OFF …

#endif /* _UAPI__LINUX_FILTER_H__ */