include/uapi/linux/seccomp.h

   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       1
  21 #define SECCOMP_FILTER_FLAG_LOG         2
  22
  23 /*
  24  * All BPF programs must return a 32-bit value.
  25  * The bottom 16-bits are for optional return data.
  26  * The upper 16-bits are ordered from least permissive values to most,
  27  * as a signed value (so 0x8000000 is negative).
  28  *
  29  * The ordering ensures that a min_t() over composed return values always
  30  * selects the least permissive choice.
  31  */
  32 #define SECCOMP_RET_KILL_PROCESS 0x80000000U /* kill the process */
  33 #define SECCOMP_RET_KILL_THREAD  0x00000000U /* kill the thread */
  34 #define SECCOMP_RET_KILL         SECCOMP_RET_KILL_THREAD
  35 #define SECCOMP_RET_TRAP         0x00030000U /* disallow and force a SIGSYS */
  36 #define SECCOMP_RET_ERRNO        0x00050000U /* returns an errno */
  37 #define SECCOMP_RET_TRACE        0x7ff00000U /* pass to a tracer or disallow */
  38 #define SECCOMP_RET_LOG          0x7ffc0000U /* allow after logging */
  39 #define SECCOMP_RET_ALLOW        0x7fff0000U /* allow */
  40
  41 /* Masks for the return value sections. */
  42 #define SECCOMP_RET_ACTION_FULL 0xffff0000U
  43 #define SECCOMP_RET_ACTION      0x7fff0000U
  44 #define SECCOMP_RET_DATA        0x0000ffffU
  45
  46 /**
  47  * struct seccomp_data - the format the BPF program executes over.
  48  * @nr: the system call number
  49  * @arch: indicates system call convention as an AUDIT_ARCH_* value
  50  *        as defined in <linux/audit.h>.
  51  * @instruction_pointer: at the time of the system call.
  52  * @args: up to 6 system call arguments always stored as 64-bit values
  53  *        regardless of the architecture.
  54  */
  55 struct seccomp_data {
  56         int nr;
  57         __u32 arch;
  58         __u64 instruction_pointer;
  59         __u64 args[6];
  60 };
  61
  62 #endif /* _UAPI_LINUX_SECCOMP_H */