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[PATCH] Process Events Connector

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This patch adds a connector that reports fork, exec, id change, and exit
events for all processes to userspace.  It replaces the fork_advisor patch
that ELSA is currently using.  Applications that may find these events
useful include accounting/auditing (e.g.  ELSA), system activity monitoring
(e.g.  top), security, and resource management (e.g.  CKRM).

Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Matt Helsley
2005-11-07 00:59:16 -08:00
committed by Linus Torvalds
parent 49364ce253
commit 9f46080c41
9 changed files with 379 additions and 0 deletions
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127
include/linux/cn_proc.h Normal file
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/*
* cn_proc.h - process events connector
*
* Copyright (C) Matt Helsley, IBM Corp. 2005
* Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
* Original copyright notice follows:
* Copyright (C) 2005 Nguyen Anh Quynh <aquynh@gmail.com>
* Copyright (C) 2005 Guillaume Thouvenin <guillaume.thouvenin@bull.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef CN_PROC_H
#define CN_PROC_H
#include <linux/types.h>
#include <linux/connector.h>
/*
* Userspace sends this enum to register with the kernel that it is listening
* for events on the connector.
*/
enum proc_cn_mcast_op {
PROC_CN_MCAST_LISTEN = 1,
PROC_CN_MCAST_IGNORE = 2
};
/*
* From the user's point of view, the process
* ID is the thread group ID and thread ID is the internal
* kernel "pid". So, fields are assigned as follow:
*
* In user space - In kernel space
*
* parent process ID = parent->tgid
* parent thread ID = parent->pid
* child process ID = child->tgid
* child thread ID = child->pid
*/
struct proc_event {
enum what {
/* Use successive bits so the enums can be used to record
* sets of events as well
*/
PROC_EVENT_NONE = 0x00000000,
PROC_EVENT_FORK = 0x00000001,
PROC_EVENT_EXEC = 0x00000002,
PROC_EVENT_UID = 0x00000004,
PROC_EVENT_GID = 0x00000040,
/* "next" should be 0x00000400 */
/* "last" is the last process event: exit */
PROC_EVENT_EXIT = 0x80000000
} what;
__u32 cpu;
union { /* must be last field of proc_event struct */
struct {
__u32 err;
} ack;
struct fork_proc_event {
pid_t parent_pid;
pid_t parent_tgid;
pid_t child_pid;
pid_t child_tgid;
} fork;
struct exec_proc_event {
pid_t process_pid;
pid_t process_tgid;
} exec;
struct id_proc_event {
pid_t process_pid;
pid_t process_tgid;
union {
uid_t ruid; /* current->uid */
gid_t rgid; /* current->gid */
} r;
union {
uid_t euid;
gid_t egid;
} e;
} id;
struct exit_proc_event {
pid_t process_pid;
pid_t process_tgid;
__u32 exit_code, exit_signal;
} exit;
} event_data;
};
#ifdef __KERNEL__
#ifdef CONFIG_PROC_EVENTS
void proc_fork_connector(struct task_struct *task);
void proc_exec_connector(struct task_struct *task);
void proc_id_connector(struct task_struct *task, int which_id);
void proc_exit_connector(struct task_struct *task);
#else
static inline void proc_fork_connector(struct task_struct *task)
{}
static inline void proc_exec_connector(struct task_struct *task)
{}
static inline void proc_id_connector(struct task_struct *task,
int which_id)
{}
static inline void proc_exit_connector(struct task_struct *task)
{}
#endif /* CONFIG_PROC_EVENTS */
#endif /* __KERNEL__ */
#endif /* CN_PROC_H */