/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Linux Socket Filter Data Structures
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*/
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#ifndef _UAPI__LINUX_FILTER_H__
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#define _UAPI__LINUX_FILTER_H__
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/bpf_common.h>
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/*
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* Current version of the filter code architecture.
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*/
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#define BPF_MAJOR_VERSION 1
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#define BPF_MINOR_VERSION 1
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/*
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* Try and keep these values and structures similar to BSD, especially
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* the BPF code definitions which need to match so you can share filters
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*/
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struct sock_filter { /* Filter block */
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__u16 code; /* Actual filter code */
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__u8 jt; /* Jump true */
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__u8 jf; /* Jump false */
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__u32 k; /* Generic multiuse field */
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};
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struct sock_fprog { /* Required for SO_ATTACH_FILTER. */
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unsigned short len; /* Number of filter blocks */
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struct sock_filter __user *filter;
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};
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/* ret - BPF_K and BPF_X also apply */
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#define BPF_RVAL(code) ((code) & 0x18)
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#define BPF_A 0x10
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/* misc */
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#define BPF_MISCOP(code) ((code) & 0xf8)
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#define BPF_TAX 0x00
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#define BPF_TXA 0x80
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/*
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* Macros for filter block array initializers.
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*/
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#ifndef BPF_STMT
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#define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k }
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#endif
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#ifndef BPF_JUMP
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#define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k }
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#endif
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/*
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* Number of scratch memory words for: BPF_ST and BPF_STX
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*/
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#define BPF_MEMWORDS 16
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/* RATIONALE. Negative offsets are invalid in BPF.
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We use them to reference ancillary data.
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Unlike introduction new instructions, it does not break
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existing compilers/optimizers.
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*/
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#define SKF_AD_OFF (-0x1000)
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#define SKF_AD_PROTOCOL 0
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#define SKF_AD_PKTTYPE 4
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#define SKF_AD_IFINDEX 8
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#define SKF_AD_NLATTR 12
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#define SKF_AD_NLATTR_NEST 16
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#define SKF_AD_MARK 20
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#define SKF_AD_QUEUE 24
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#define SKF_AD_HATYPE 28
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#define SKF_AD_RXHASH 32
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#define SKF_AD_CPU 36
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#define SKF_AD_ALU_XOR_X 40
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#define SKF_AD_VLAN_TAG 44
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#define SKF_AD_VLAN_TAG_PRESENT 48
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#define SKF_AD_PAY_OFFSET 52
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#define SKF_AD_RANDOM 56
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#define SKF_AD_VLAN_TPID 60
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#define SKF_AD_MAX 64
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#define SKF_NET_OFF (-0x100000)
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#define SKF_LL_OFF (-0x200000)
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#define BPF_NET_OFF SKF_NET_OFF
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#define BPF_LL_OFF SKF_LL_OFF
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#endif /* _UAPI__LINUX_FILTER_H__ */
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