include/uapi/linux/seccomp.h

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