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/* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
/*
* 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
* 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 version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef CN_PROC_H
#define CN_PROC_H
#include <linux/types.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
};
#define PROC_EVENT_ALL (PROC_EVENT_FORK | PROC_EVENT_EXEC | PROC_EVENT_UID | \
PROC_EVENT_GID | PROC_EVENT_SID | PROC_EVENT_PTRACE | \
PROC_EVENT_COMM | PROC_EVENT_NONZERO_EXIT | \
PROC_EVENT_COREDUMP | PROC_EVENT_EXIT)
/*
* If you add an entry in proc_cn_event, make sure you add it in
* PROC_EVENT_ALL above as well.
*/
enum proc_cn_event {
/* 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,
PROC_EVENT_SID = 0x00000080,
PROC_EVENT_PTRACE = 0x00000100,
PROC_EVENT_COMM = 0x00000200,
/* "next" should be 0x00000400 */
/* "last" is the last process event: exit,
* while "next to last" is coredumping event
* before that is report only if process dies
* with non-zero exit status
*/
PROC_EVENT_NONZERO_EXIT = 0x20000000,
PROC_EVENT_COREDUMP = 0x40000000,
PROC_EVENT_EXIT = 0x80000000
};
struct proc_input {
enum proc_cn_mcast_op mcast_op;
enum proc_cn_event event_type;
};
static __inline__ enum proc_cn_event valid_event(enum proc_cn_event ev_type)
{
return (enum proc_cn_event)(ev_type & PROC_EVENT_ALL);
}
/*
* 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 proc_cn_event what;
__u32 cpu;
__u64 __attribute__((aligned(8))) timestamp_ns;
/* Number of nano seconds since system boot */
union { /* must be last field of proc_event struct */
struct {
__u32 err;
} ack;
struct fork_proc_event {
__kernel_pid_t parent_pid;
__kernel_pid_t parent_tgid;
__kernel_pid_t child_pid;
__kernel_pid_t child_tgid;
} fork;
struct exec_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
} exec;
struct id_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
union {
__u32 ruid; /* task uid */
__u32 rgid; /* task gid */
} r;
union {
__u32 euid;
__u32 egid;
} e;
} id;
struct sid_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
} sid;
struct ptrace_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
__kernel_pid_t tracer_pid;
__kernel_pid_t tracer_tgid;
} ptrace;
struct comm_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
char comm[16];
} comm;
struct coredump_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
__kernel_pid_t parent_pid;
__kernel_pid_t parent_tgid;
} coredump;
struct exit_proc_event {
__kernel_pid_t process_pid;
__kernel_pid_t process_tgid;
__u32 exit_code, exit_signal;
__kernel_pid_t parent_pid;
__kernel_pid_t parent_tgid;
} exit;
} event_data;
};
#endif /* CN_PROC_H */
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