include/linux/cn_proc.h

   1 /*
   2  * cn_proc.h - process events connector
   3  *
   4  * Copyright (C) Matt Helsley, IBM Corp. 2005
   5  * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
   6  * Original copyright notice follows:
   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
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  */
  24
  25 #ifndef CN_PROC_H
  26 #define CN_PROC_H
  27
  28 #include <linux/types.h>
  29 #include <linux/time.h>
  30 #include <linux/connector.h>
  31
  32 /*
  33  * Userspace sends this enum to register with the kernel that it is listening
  34  * for events on the connector.
  35  */
  36 enum proc_cn_mcast_op {
  37         PROC_CN_MCAST_LISTEN = 1,
  38         PROC_CN_MCAST_IGNORE = 2
  39 };
  40
  41 /*
  42  * From the user's point of view, the process
  43  * ID is the thread group ID and thread ID is the internal
  44  * kernel "pid". So, fields are assigned as follow:
  45  *
  46  *  In user space     -  In  kernel space
  47  *
  48  * parent process ID  =  parent->tgid
  49  * parent thread  ID  =  parent->pid
  50  * child  process ID  =  child->tgid
  51  * child  thread  ID  =  child->pid
  52  */
  53
  54 struct proc_event {
  55         enum what {
  56                 /* Use successive bits so the enums can be used to record
  57                  * sets of events as well
  58                  */
  59                 PROC_EVENT_NONE = 0x00000000,
  60                 PROC_EVENT_FORK = 0x00000001,
  61                 PROC_EVENT_EXEC = 0x00000002,
  62                 PROC_EVENT_UID  = 0x00000004,
  63                 PROC_EVENT_GID  = 0x00000040,
  64                 /* "next" should be 0x00000400 */
  65                 /* "last" is the last process event: exit */
  66                 PROC_EVENT_EXIT = 0x80000000
  67         } what;
  68         __u32 cpu;
  69         struct timespec timestamp;
  70         union { /* must be last field of proc_event struct */
  71                 struct {
  72                         __u32 err;
  73                 } ack;
  74
  75                 struct fork_proc_event {
  76                         pid_t parent_pid;
  77                         pid_t parent_tgid;
  78                         pid_t child_pid;
  79                         pid_t child_tgid;
  80                 } fork;
  81
  82                 struct exec_proc_event {
  83                         pid_t process_pid;
  84                         pid_t process_tgid;
  85                 } exec;
  86
  87                 struct id_proc_event {
  88                         pid_t process_pid;
  89                         pid_t process_tgid;
  90                         union {
  91                                 __u32 ruid; /* task uid */
  92                                 __u32 rgid; /* task gid */
  93                         } r;
  94                         union {
  95                                 __u32 euid;
  96                                 __u32 egid;
  97                         } e;
  98                 } id;
  99
 100                 struct exit_proc_event {
 101                         pid_t process_pid;
 102                         pid_t process_tgid;
 103                         __u32 exit_code, exit_signal;
 104                 } exit;
 105         } event_data;
 106 };
 107
 108 #ifdef __KERNEL__
 109 #ifdef CONFIG_PROC_EVENTS
 110 void proc_fork_connector(struct task_struct *task);
 111 void proc_exec_connector(struct task_struct *task);
 112 void proc_id_connector(struct task_struct *task, int which_id);
 113 void proc_exit_connector(struct task_struct *task);
 114 #else
 115 static inline void proc_fork_connector(struct task_struct *task)
 116 {}
 117
 118 static inline void proc_exec_connector(struct task_struct *task)
 119 {}
 120
 121 static inline void proc_id_connector(struct task_struct *task,
 122                                      int which_id)
 123 {}
 124
 125 static inline void proc_exit_connector(struct task_struct *task)
 126 {}
 127 #endif  /* CONFIG_PROC_EVENTS */
 128 #endif  /* __KERNEL__ */
 129 #endif  /* CN_PROC_H */