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tracing/user_events: Split header into uapi and kernel

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The UAPI parts need to be split out from the kernel parts of user_events
now that other parts of the kernel will reference it. Do so by moving
the existing include/linux/user_events.h into
include/uapi/linux/user_events.h.

Link: https://lkml.kernel.org/r/20230328235219.203-2-beaub@linux.microsoft.com

Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Beau Belgrave 2023-03-28 16:52:08 -07:00 committed by Steven Rostedt (Google)
parent 80a76994b2
commit e5a26a4048
3 changed files with 54 additions and 51 deletions
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52
include/linux/user_events.h
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@ -1,54 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2021, Microsoft Corporation.
* Copyright (c) 2022, Microsoft Corporation.
*
* Authors:
* Beau Belgrave <beaub@linux.microsoft.com>
*/
#ifndef _UAPI_LINUX_USER_EVENTS_H
#define _UAPI_LINUX_USER_EVENTS_H
#include <linux/types.h>
#include <linux/ioctl.h>
#ifndef _LINUX_USER_EVENTS_H
#define _LINUX_USER_EVENTS_H
#ifdef __KERNEL__
#include <linux/uio.h>
#else
#include <sys/uio.h>
#endif
#include <uapi/linux/user_events.h>
#define USER_EVENTS_SYSTEM "user_events"
#define USER_EVENTS_PREFIX "u:"
/* Create dynamic location entry within a 32-bit value */
#define DYN_LOC(offset, size) ((size) << 16 | (offset))
/*
* Describes an event registration and stores the results of the registration.
* This structure is passed to the DIAG_IOCSREG ioctl, callers at a minimum
* must set the size and name_args before invocation.
*/
struct user_reg {
/* Input: Size of the user_reg structure being used */
__u32 size;
/* Input: Pointer to string with event name, description and flags */
__u64 name_args;
/* Output: Bitwise index of the event within the status page */
__u32 status_bit;
/* Output: Index of the event to use when writing data */
__u32 write_index;
} __attribute__((__packed__));
#define DIAG_IOC_MAGIC '*'
/* Requests to register a user_event */
#define DIAG_IOCSREG _IOWR(DIAG_IOC_MAGIC, 0, struct user_reg*)
/* Requests to delete a user_event */
#define DIAG_IOCSDEL _IOW(DIAG_IOC_MAGIC, 1, char*)
#endif /* _UAPI_LINUX_USER_EVENTS_H */
#endif /* _LINUX_USER_EVENTS_H */

48
include/uapi/linux/user_events.h Normal file
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@ -0,0 +1,48 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright (c) 2021-2022, Microsoft Corporation.
*
* Authors:
* Beau Belgrave <beaub@linux.microsoft.com>
*/
#ifndef _UAPI_LINUX_USER_EVENTS_H
#define _UAPI_LINUX_USER_EVENTS_H
#include <linux/types.h>
#include <linux/ioctl.h>
#define USER_EVENTS_SYSTEM "user_events"
#define USER_EVENTS_PREFIX "u:"
/* Create dynamic location entry within a 32-bit value */
#define DYN_LOC(offset, size) ((size) << 16 | (offset))
/*
* Describes an event registration and stores the results of the registration.
* This structure is passed to the DIAG_IOCSREG ioctl, callers at a minimum
* must set the size and name_args before invocation.
*/
struct user_reg {
/* Input: Size of the user_reg structure being used */
__u32 size;
/* Input: Pointer to string with event name, description and flags */
__u64 name_args;
/* Output: Bitwise index of the event within the status page */
__u32 status_bit;
/* Output: Index of the event to use when writing data */
__u32 write_index;
} __attribute__((__packed__));
#define DIAG_IOC_MAGIC '*'
/* Request to register a user_event */
#define DIAG_IOCSREG _IOWR(DIAG_IOC_MAGIC, 0, struct user_reg *)
/* Request to delete a user_event */
#define DIAG_IOCSDEL _IOW(DIAG_IOC_MAGIC, 1, char *)
#endif /* _UAPI_LINUX_USER_EVENTS_H */

5
kernel/trace/trace_events_user.c
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@ -19,12 +19,7 @@
#include <linux/tracefs.h>
#include <linux/types.h>
#include <linux/uaccess.h>
/* Reminder to move to uapi when everything works */
#ifdef CONFIG_COMPILE_TEST
#include <linux/user_events.h>
#else
#include <uapi/linux/user_events.h>
#endif
#include "trace.h"
#include "trace_dynevent.h"