91 lines · c
1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/*3 * Linux Socket Filter Data Structures4 */5 6#ifndef _UAPI__LINUX_FILTER_H__7#define _UAPI__LINUX_FILTER_H__8 9#include <linux/compiler.h>10#include <linux/types.h>11#include <linux/bpf_common.h>12 13/*14 * Current version of the filter code architecture.15 */16#define BPF_MAJOR_VERSION 117#define BPF_MINOR_VERSION 118 19/*20 * Try and keep these values and structures similar to BSD, especially21 * the BPF code definitions which need to match so you can share filters22 */23 24struct sock_filter { /* Filter block */25 __u16 code; /* Actual filter code */26 __u8 jt; /* Jump true */27 __u8 jf; /* Jump false */28 __u32 k; /* Generic multiuse field */29};30 31struct sock_fprog { /* Required for SO_ATTACH_FILTER. */32 unsigned short len; /* Number of filter blocks */33 struct sock_filter __user *filter;34};35 36/* ret - BPF_K and BPF_X also apply */37#define BPF_RVAL(code) ((code) & 0x18)38#define BPF_A 0x1039 40/* misc */41#define BPF_MISCOP(code) ((code) & 0xf8)42#define BPF_TAX 0x0043#define BPF_TXA 0x8044 45/*46 * Macros for filter block array initializers.47 */48#ifndef BPF_STMT49#define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k }50#endif51#ifndef BPF_JUMP52#define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k }53#endif54 55/*56 * Number of scratch memory words for: BPF_ST and BPF_STX57 */58#define BPF_MEMWORDS 1659 60/* RATIONALE. Negative offsets are invalid in BPF.61 We use them to reference ancillary data.62 Unlike introduction new instructions, it does not break63 existing compilers/optimizers.64 */65#define SKF_AD_OFF (-0x1000)66#define SKF_AD_PROTOCOL 067#define SKF_AD_PKTTYPE 468#define SKF_AD_IFINDEX 869#define SKF_AD_NLATTR 1270#define SKF_AD_NLATTR_NEST 1671#define SKF_AD_MARK 2072#define SKF_AD_QUEUE 2473#define SKF_AD_HATYPE 2874#define SKF_AD_RXHASH 3275#define SKF_AD_CPU 3676#define SKF_AD_ALU_XOR_X 4077#define SKF_AD_VLAN_TAG 4478#define SKF_AD_VLAN_TAG_PRESENT 4879#define SKF_AD_PAY_OFFSET 5280#define SKF_AD_RANDOM 5681#define SKF_AD_VLAN_TPID 6082#define SKF_AD_MAX 6483 84#define SKF_NET_OFF (-0x100000)85#define SKF_LL_OFF (-0x200000)86 87#define BPF_NET_OFF SKF_NET_OFF88#define BPF_LL_OFF SKF_LL_OFF89 90#endif /* _UAPI__LINUX_FILTER_H__ */91