root/include/uapi/linux/seccomp.h

INCLUDED FROM

   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 #define SECCOMP_GET_NOTIF_SIZES         3
  19 
  20 /* Valid flags for SECCOMP_SET_MODE_FILTER */
  21 #define SECCOMP_FILTER_FLAG_TSYNC               (1UL << 0)
  22 #define SECCOMP_FILTER_FLAG_LOG                 (1UL << 1)
  23 #define SECCOMP_FILTER_FLAG_SPEC_ALLOW          (1UL << 2)
  24 #define SECCOMP_FILTER_FLAG_NEW_LISTENER        (1UL << 3)
  25 
  26 /*
  27  * All BPF programs must return a 32-bit value.
  28  * The bottom 16-bits are for optional return data.
  29  * The upper 16-bits are ordered from least permissive values to most,
  30  * as a signed value (so 0x8000000 is negative).
  31  *
  32  * The ordering ensures that a min_t() over composed return values always
  33  * selects the least permissive choice.
  34  */
  35 #define SECCOMP_RET_KILL_PROCESS 0x80000000U /* kill the process */
  36 #define SECCOMP_RET_KILL_THREAD  0x00000000U /* kill the thread */
  37 #define SECCOMP_RET_KILL         SECCOMP_RET_KILL_THREAD
  38 #define SECCOMP_RET_TRAP         0x00030000U /* disallow and force a SIGSYS */
  39 #define SECCOMP_RET_ERRNO        0x00050000U /* returns an errno */
  40 #define SECCOMP_RET_USER_NOTIF   0x7fc00000U /* notifies userspace */
  41 #define SECCOMP_RET_TRACE        0x7ff00000U /* pass to a tracer or disallow */
  42 #define SECCOMP_RET_LOG          0x7ffc0000U /* allow after logging */
  43 #define SECCOMP_RET_ALLOW        0x7fff0000U /* allow */
  44 
  45 /* Masks for the return value sections. */
  46 #define SECCOMP_RET_ACTION_FULL 0xffff0000U
  47 #define SECCOMP_RET_ACTION      0x7fff0000U
  48 #define SECCOMP_RET_DATA        0x0000ffffU
  49 
  50 /**
  51  * struct seccomp_data - the format the BPF program executes over.
  52  * @nr: the system call number
  53  * @arch: indicates system call convention as an AUDIT_ARCH_* value
  54  *        as defined in <linux/audit.h>.
  55  * @instruction_pointer: at the time of the system call.
  56  * @args: up to 6 system call arguments always stored as 64-bit values
  57  *        regardless of the architecture.
  58  */
  59 struct seccomp_data {
  60         int nr;
  61         __u32 arch;
  62         __u64 instruction_pointer;
  63         __u64 args[6];
  64 };
  65 
  66 struct seccomp_notif_sizes {
  67         __u16 seccomp_notif;
  68         __u16 seccomp_notif_resp;
  69         __u16 seccomp_data;
  70 };
  71 
  72 struct seccomp_notif {
  73         __u64 id;
  74         __u32 pid;
  75         __u32 flags;
  76         struct seccomp_data data;
  77 };
  78 
  79 struct seccomp_notif_resp {
  80         __u64 id;
  81         __s64 val;
  82         __s32 error;
  83         __u32 flags;
  84 };
  85 
  86 #define SECCOMP_IOC_MAGIC               '!'
  87 #define SECCOMP_IO(nr)                  _IO(SECCOMP_IOC_MAGIC, nr)
  88 #define SECCOMP_IOR(nr, type)           _IOR(SECCOMP_IOC_MAGIC, nr, type)
  89 #define SECCOMP_IOW(nr, type)           _IOW(SECCOMP_IOC_MAGIC, nr, type)
  90 #define SECCOMP_IOWR(nr, type)          _IOWR(SECCOMP_IOC_MAGIC, nr, type)
  91 
  92 /* Flags for seccomp notification fd ioctl. */
  93 #define SECCOMP_IOCTL_NOTIF_RECV        SECCOMP_IOWR(0, struct seccomp_notif)
  94 #define SECCOMP_IOCTL_NOTIF_SEND        SECCOMP_IOWR(1, \
  95                                                 struct seccomp_notif_resp)
  96 #define SECCOMP_IOCTL_NOTIF_ID_VALID    SECCOMP_IOR(2, __u64)
  97 #endif /* _UAPI_LINUX_SECCOMP_H */