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| author | Beau Belgrave <beaub@linux.microsoft.com> | 2023-03-28 16:52:08 -0700 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-03-29 06:52:08 -0400 |
| commit | e5a26a4048eeb9558e5c84f340a989c78db4adf4 (patch) | |
| tree | 54f43d2bbfd2f00ef4e48c16a4bdb268d9ac32c8 /include/uapi | |
| parent | 80a76994b2d88161697bd92b8b6367d9040dbe2a (diff) | |
| download | linux-stable-e5a26a4048eeb9558e5c84f340a989c78db4adf4.tar.gz linux-stable-e5a26a4048eeb9558e5c84f340a989c78db4adf4.tar.bz2 linux-stable-e5a26a4048eeb9558e5c84f340a989c78db4adf4.zip | |
tracing/user_events: Split header into uapi and kernel
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>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/user_events.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/include/uapi/linux/user_events.h b/include/uapi/linux/user_events.h new file mode 100644 index 000000000000..03f92366068d --- /dev/null +++ b/include/uapi/linux/user_events.h @@ -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 */ |