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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 */
56struct seccomp_data {
57 int nr;
58 __u32 arch;
59 __u64 instruction_pointer;
60 __u64 args[6];
61};
62
63#endif /* _UAPI_LINUX_SECCOMP_H */