1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * Linux Socket Filter Data Structures 4 */ 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 1 17 #define BPF_MINOR_VERSION 1 18 19 /* 20 * Try and keep these values and structures similar to BSD, especially 21 * the BPF code definitions which need to match so you can share filters 22 */ 23 24 struct 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 31 struct 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 0x10 39 40 /* misc */ 41 #define BPF_MISCOP(code) ((code) & 0xf8) 42 #define BPF_TAX 0x00 43 #define BPF_TXA 0x80 44 45 /* 46 * Macros for filter block array initializers. 47 */ 48 #ifndef BPF_STMT 49 #define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k } 50 #endif 51 #ifndef BPF_JUMP 52 #define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k } 53 #endif 54 55 /* 56 * Number of scratch memory words for: BPF_ST and BPF_STX 57 */ 58 #define BPF_MEMWORDS 16 59 60 /* RATIONALE. Negative offsets are invalid in BPF. 61 We use them to reference ancillary data. 62 Unlike introduction new instructions, it does not break 63 existing compilers/optimizers. 64 */ 65 #define SKF_AD_OFF (-0x1000) 66 #define SKF_AD_PROTOCOL 0 67 #define SKF_AD_PKTTYPE 4 68 #define SKF_AD_IFINDEX 8 69 #define SKF_AD_NLATTR 12 70 #define SKF_AD_NLATTR_NEST 16 71 #define SKF_AD_MARK 20 72 #define SKF_AD_QUEUE 24 73 #define SKF_AD_HATYPE 28 74 #define SKF_AD_RXHASH 32 75 #define SKF_AD_CPU 36 76 #define SKF_AD_ALU_XOR_X 40 77 #define SKF_AD_VLAN_TAG 44 78 #define SKF_AD_VLAN_TAG_PRESENT 48 79 #define SKF_AD_PAY_OFFSET 52 80 #define SKF_AD_RANDOM 56 81 #define SKF_AD_VLAN_TPID 60 82 #define SKF_AD_MAX 64 83 84 #define SKF_NET_OFF (-0x100000) 85 #define SKF_LL_OFF (-0x200000) 86 87 #define BPF_NET_OFF SKF_NET_OFF 88 #define BPF_LL_OFF SKF_LL_OFF 89 90 #endif /* _UAPI__LINUX_FILTER_H__ */ 91
