1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _UAPI_LINUX_SECCOMP_H 3 #define _UAPI_LINUX_SECCOMP_H 4 5 #include <linux/compiler.h> 6 #include <linux/types.h> 7 8 9 /* Valid values for seccomp.mode and prctl(PR_SET_SECCOMP, <mode>) */ 10 #define SECCOMP_MODE_DISABLED 0 /* seccomp is not in use. */ 11 #define SECCOMP_MODE_STRICT 1 /* uses hard-coded filter. */ 12 #define SECCOMP_MODE_FILTER 2 /* uses user-supplied filter. */ 13 14 /* Valid operations for seccomp syscall. */ 15 #define SECCOMP_SET_MODE_STRICT 0 16 #define SECCOMP_SET_MODE_FILTER 1 17 #define SECCOMP_GET_ACTION_AVAIL 2 18 19 /* Valid flags for SECCOMP_SET_MODE_FILTER */ 20 #define SECCOMP_FILTER_FLAG_TSYNC (1UL << 0) 21 #define SECCOMP_FILTER_FLAG_LOG (1UL << 1) 22 #define SECCOMP_FILTER_FLAG_SPEC_ALLOW (1UL << 2) 23 24 /* 25 * All BPF programs must return a 32-bit value. 26 * The bottom 16-bits are for optional return data. 27 * The upper 16-bits are ordered from least permissive values to most, 28 * as a signed value (so 0x8000000 is negative). 29 * 30 * The ordering ensures that a min_t() over composed return values always 31 * selects the least permissive choice. 32 */ 33 #define SECCOMP_RET_KILL_PROCESS 0x80000000U /* kill the process */ 34 #define SECCOMP_RET_KILL_THREAD 0x00000000U /* kill the thread */ 35 #define SECCOMP_RET_KILL SECCOMP_RET_KILL_THREAD 36 #define SECCOMP_RET_TRAP 0x00030000U /* disallow and force a SIGSYS */ 37 #define SECCOMP_RET_ERRNO 0x00050000U /* returns an errno */ 38 #define SECCOMP_RET_TRACE 0x7ff00000U /* pass to a tracer or disallow */ 39 #define SECCOMP_RET_LOG 0x7ffc0000U /* allow after logging */ 40 #define SECCOMP_RET_ALLOW 0x7fff0000U /* allow */ 41 42 /* Masks for the return value sections. */ 43 #define SECCOMP_RET_ACTION_FULL 0xffff0000U 44 #define SECCOMP_RET_ACTION 0x7fff0000U 45 #define SECCOMP_RET_DATA 0x0000ffffU 46 47 /** 48 * struct seccomp_data - the format the BPF program executes over. 49 * @nr: the system call number 50 * @arch: indicates system call convention as an AUDIT_ARCH_* value 51 * as defined in <linux/audit.h>. 52 * @instruction_pointer: at the time of the system call. 53 * @args: up to 6 system call arguments always stored as 64-bit values 54 * regardless of the architecture. 55 */ 56 struct seccomp_data { 57 int nr; 58 __u32 arch; 59 __u64 instruction_pointer; 60 __u64 args[6]; 61 }; 62 63 #endif /* _UAPI_LINUX_SECCOMP_H */ 64