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 #define PROC_EVENT_ALL (PROC_EVENT_FORK | PROC_EVENT_EXEC | PROC_EVENT_UID |  \
  34                         PROC_EVENT_GID | PROC_EVENT_SID | PROC_EVENT_PTRACE | \
  35                         PROC_EVENT_COMM | PROC_EVENT_NONZERO_EXIT |           \
  36                         PROC_EVENT_COREDUMP | PROC_EVENT_EXIT)
  37
  38 /*
  39  * If you add an entry in proc_cn_event, make sure you add it in
  40  * PROC_EVENT_ALL above as well.
  41  */
  42 enum proc_cn_event {
  43         /* Use successive bits so the enums can be used to record
  44          * sets of events as well
  45          */
  46         PROC_EVENT_NONE = 0x00000000,
  47         PROC_EVENT_FORK = 0x00000001,
  48         PROC_EVENT_EXEC = 0x00000002,
  49         PROC_EVENT_UID  = 0x00000004,
  50         PROC_EVENT_GID  = 0x00000040,
  51         PROC_EVENT_SID  = 0x00000080,
  52         PROC_EVENT_PTRACE = 0x00000100,
  53         PROC_EVENT_COMM = 0x00000200,
  54         /* "next" should be 0x00000400 */
  55         /* "last" is the last process event: exit,
  56          * while "next to last" is coredumping event
  57          * before that is report only if process dies
  58          * with non-zero exit status
  59          */
  60         PROC_EVENT_NONZERO_EXIT = 0x20000000,
  61         PROC_EVENT_COREDUMP = 0x40000000,
  62         PROC_EVENT_EXIT = 0x80000000
  63 };
  64
  65 struct proc_input {
  66         enum proc_cn_mcast_op mcast_op;
  67         enum proc_cn_event event_type;
  68 };
  69
  70 static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type)
  71 {
  72         return (enum proc_cn_event)(ev_type & PROC_EVENT_ALL);
  73 }
  74
  75 /*
  76  * From the user's point of view, the process
  77  * ID is the thread group ID and thread ID is the internal
  78  * kernel "pid". So, fields are assigned as follow:
  79  *
  80  *  In user space     -  In  kernel space
  81  *
  82  * parent process ID  =  parent->tgid
  83  * parent thread  ID  =  parent->pid
  84  * child  process ID  =  child->tgid
  85  * child  thread  ID  =  child->pid
  86  */
  87
  88 struct proc_event {
  89         enum proc_cn_event what;
  90         __u32 cpu;
  91         __u64 __attribute__((aligned(8))) timestamp_ns;
  92                 /* Number of nano seconds since system boot */
  93         union { /* must be last field of proc_event struct */
  94                 struct {
  95                         __u32 err;
  96                 } ack;
  97
  98                 struct fork_proc_event {
  99                         __kernel_pid_t parent_pid;
 100                         __kernel_pid_t parent_tgid;
 101                         __kernel_pid_t child_pid;
 102                         __kernel_pid_t child_tgid;
 103                 } fork;
 104
 105                 struct exec_proc_event {
 106                         __kernel_pid_t process_pid;
 107                         __kernel_pid_t process_tgid;
 108                 } exec;
 109
 110                 struct id_proc_event {
 111                         __kernel_pid_t process_pid;
 112                         __kernel_pid_t process_tgid;
 113                         union {
 114                                 __u32 ruid; /* task uid */
 115                                 __u32 rgid; /* task gid */
 116                         } r;
 117                         union {
 118                                 __u32 euid;
 119                                 __u32 egid;
 120                         } e;
 121                 } id;
 122
 123                 struct sid_proc_event {
 124                         __kernel_pid_t process_pid;
 125                         __kernel_pid_t process_tgid;
 126                 } sid;
 127
 128                 struct ptrace_proc_event {
 129                         __kernel_pid_t process_pid;
 130                         __kernel_pid_t process_tgid;
 131                         __kernel_pid_t tracer_pid;
 132                         __kernel_pid_t tracer_tgid;
 133                 } ptrace;
 134
 135                 struct comm_proc_event {
 136                         __kernel_pid_t process_pid;
 137                         __kernel_pid_t process_tgid;
 138                         char           comm[16];
 139                 } comm;
 140
 141                 struct coredump_proc_event {
 142                         __kernel_pid_t process_pid;
 143                         __kernel_pid_t process_tgid;
 144                         __kernel_pid_t parent_pid;
 145                         __kernel_pid_t parent_tgid;
 146                 } coredump;
 147
 148                 struct exit_proc_event {
 149                         __kernel_pid_t process_pid;
 150                         __kernel_pid_t process_tgid;
 151                         __u32 exit_code, exit_signal;
 152                         __kernel_pid_t parent_pid;
 153                         __kernel_pid_t parent_tgid;
 154                 } exit;
 155
 156         } event_data;
 157 };
 158
 159 #endif /* _UAPICN_PROC_H */