| /* 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 1 |
| #define BPF_MINOR_VERSION 1 |
| |
| /* |
| * 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 { /* Filter block */ |
| __u16 code; /* Actual filter code */ |
| __u8 jt; /* Jump true */ |
| __u8 jf; /* Jump false */ |
| __u32 k; /* Generic multiuse field */ |
| }; |
| |
| struct sock_fprog { /* Required for SO_ATTACH_FILTER. */ |
| unsigned short len; /* Number of filter blocks */ |
| struct sock_filter __user *filter; |
| }; |
| |
| /* ret - BPF_K and BPF_X also apply */ |
| #define BPF_RVAL(code) ((code) & 0x18) |
| #define BPF_A 0x10 |
| |
| /* misc */ |
| #define BPF_MISCOP(code) ((code) & 0xf8) |
| #define BPF_TAX 0x00 |
| #define BPF_TXA 0x80 |
| |
| /* |
| * Macros for filter block array initializers. |
| */ |
| #ifndef BPF_STMT |
| #define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k } |
| #endif |
| #ifndef BPF_JUMP |
| #define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k } |
| #endif |
| |
| /* |
| * Number of scratch memory words for: BPF_ST and BPF_STX |
| */ |
| #define BPF_MEMWORDS 16 |
| |
| /* 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 (-0x1000) |
| #define SKF_AD_PROTOCOL 0 |
| #define SKF_AD_PKTTYPE 4 |
| #define SKF_AD_IFINDEX 8 |
| #define SKF_AD_NLATTR 12 |
| #define SKF_AD_NLATTR_NEST 16 |
| #define SKF_AD_MARK 20 |
| #define SKF_AD_QUEUE 24 |
| #define SKF_AD_HATYPE 28 |
| #define SKF_AD_RXHASH 32 |
| #define SKF_AD_CPU 36 |
| #define SKF_AD_ALU_XOR_X 40 |
| #define SKF_AD_VLAN_TAG 44 |
| #define SKF_AD_VLAN_TAG_PRESENT 48 |
| #define SKF_AD_PAY_OFFSET 52 |
| #define SKF_AD_RANDOM 56 |
| #define SKF_AD_VLAN_TPID 60 |
| #define SKF_AD_MAX 64 |
| |
| #define SKF_NET_OFF (-0x100000) |
| #define SKF_LL_OFF (-0x200000) |
| |
| #define BPF_NET_OFF SKF_NET_OFF |
| #define BPF_LL_OFF SKF_LL_OFF |
| |
| #endif /* _UAPI__LINUX_FILTER_H__ */ |