mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 05:04:00 +08:00
822cfbff2e
Events sent by Process Events Connector from a 64-bit kernel are not binary compatible with a 32-bit userspace program because the "timestamp" field (struct timespec) is not arch independent. This affects the fields that follow "timestamp" as they will be be off by 8 bytes. This is a problem for 32-bit userspace programs running with 64-bit kernels on ppc64, s390, x86-64.. any "biarch" system. Matt had submitted a different solution to lkml as an RFC earlier. We have since switched to a solution recommended by Evgeniy Polyakov. This patch fixes the problem by changing the timestamp to be a __u64, which stores the number of nanoseconds. Tested on a x86_64 system with both 32 bit application and 64 bit application and on a i386 system. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/*
|
|
* 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
|
|
};
|
|
|
|
/*
|
|
* 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;
|
|
__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 {
|
|
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 {
|
|
__u32 ruid; /* task uid */
|
|
__u32 rgid; /* task gid */
|
|
} r;
|
|
union {
|
|
__u32 euid;
|
|
__u32 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 */
|