include/uapi/linux/cn_proc.h

   1 /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
   2 /*
   3  * cn_proc.h - process events connector
   4  *
   5  * Copyright (C) Matt Helsley, IBM Corp. 2005
   6  * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
   7  * Copyright (C) 2005 Nguyen Anh Quynh <aquynh@gmail.com>
   8  * Copyright (C) 2005 Guillaume Thouvenin <guillaume.thouvenin@bull.net>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of version 2.1 of the GNU Lesser General Public License
  12  * as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it would be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17  */
  18
  19 #ifndef _UAPICN_PROC_H
  20 #define _UAPICN_PROC_H
  21
  22 #include <linux/types.h>
  23
  24 /*
  25  * Userspace sends this enum to register with the kernel that it is listening
  26  * for events on the connector.
  27  */
  28 enum proc_cn_mcast_op {
  29         PROC_CN_MCAST_LISTEN = 1,
  30         PROC_CN_MCAST_IGNORE = 2
  31 };
  32
  33 /*
  34  * From the user's point of view, the process
  35  * ID is the thread group ID and thread ID is the internal
  36  * kernel "pid". So, fields are assigned as follow:
  37  *
  38  *  In user space     -  In  kernel space
  39  *
  40  * parent process ID  =  parent->tgid
  41  * parent thread  ID  =  parent->pid
  42  * child  process ID  =  child->tgid
  43  * child  thread  ID  =  child->pid
  44  */
  45
  46 struct proc_event {
  47         enum what {
  48                 /* Use successive bits so the enums can be used to record
  49                  * sets of events as well
  50                  */
  51                 PROC_EVENT_NONE = 0x00000000,
  52                 PROC_EVENT_FORK = 0x00000001,
  53                 PROC_EVENT_EXEC = 0x00000002,
  54                 PROC_EVENT_UID  = 0x00000004,
  55                 PROC_EVENT_GID  = 0x00000040,
  56                 PROC_EVENT_SID  = 0x00000080,
  57                 PROC_EVENT_PTRACE = 0x00000100,
  58                 PROC_EVENT_COMM = 0x00000200,
  59                 /* "next" should be 0x00000400 */
  60                 /* "last" is the last process event: exit,
  61                  * while "next to last" is coredumping event */
  62                 PROC_EVENT_COREDUMP = 0x40000000,
  63                 PROC_EVENT_EXIT = 0x80000000
  64         } what;
  65         __u32 cpu;
  66         __u64 __attribute__((aligned(8))) timestamp_ns;
  67                 /* Number of nano seconds since system boot */
  68         union { /* must be last field of proc_event struct */
  69                 struct {
  70                         __u32 err;
  71                 } ack;
  72
  73                 struct fork_proc_event {
  74                         __kernel_pid_t parent_pid;
  75                         __kernel_pid_t parent_tgid;
  76                         __kernel_pid_t child_pid;
  77                         __kernel_pid_t child_tgid;
  78                 } fork;
  79
  80                 struct exec_proc_event {
  81                         __kernel_pid_t process_pid;
  82                         __kernel_pid_t process_tgid;
  83                 } exec;
  84
  85                 struct id_proc_event {
  86                         __kernel_pid_t process_pid;
  87                         __kernel_pid_t process_tgid;
  88                         union {
  89                                 __u32 ruid; /* task uid */
  90                                 __u32 rgid; /* task gid */
  91                         } r;
  92                         union {
  93                                 __u32 euid;
  94                                 __u32 egid;
  95                         } e;
  96                 } id;
  97
  98                 struct sid_proc_event {
  99                         __kernel_pid_t process_pid;
 100                         __kernel_pid_t process_tgid;
 101                 } sid;
 102
 103                 struct ptrace_proc_event {
 104                         __kernel_pid_t process_pid;
 105                         __kernel_pid_t process_tgid;
 106                         __kernel_pid_t tracer_pid;
 107                         __kernel_pid_t tracer_tgid;
 108                 } ptrace;
 109
 110                 struct comm_proc_event {
 111                         __kernel_pid_t process_pid;
 112                         __kernel_pid_t process_tgid;
 113                         char           comm[16];
 114                 } comm;
 115
 116                 struct coredump_proc_event {
 117                         __kernel_pid_t process_pid;
 118                         __kernel_pid_t process_tgid;
 119                 } coredump;
 120
 121                 struct exit_proc_event {
 122                         __kernel_pid_t process_pid;
 123                         __kernel_pid_t process_tgid;
 124                         __u32 exit_code, exit_signal;
 125                 } exit;
 126
 127         } event_data;
 128 };
 129
 130 #endif /* _UAPICN_PROC_H */