64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright (c) 2021, Microsoft Corporation.
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*
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* Authors:
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* Beau Belgrave <beaub@linux.microsoft.com>
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*/
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#ifndef _UAPI_LINUX_USER_EVENTS_H
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#define _UAPI_LINUX_USER_EVENTS_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#ifdef __KERNEL__
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#include <linux/uio.h>
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#else
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#include <sys/uio.h>
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#endif
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#define USER_EVENTS_SYSTEM "user_events"
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#define USER_EVENTS_PREFIX "u:"
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/* Bits 0-6 are for known probe types, Bit 7 is for unknown probes */
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#define EVENT_BIT_FTRACE 0
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#define EVENT_BIT_PERF 1
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#define EVENT_BIT_OTHER 7
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#define EVENT_STATUS_FTRACE (1 << EVENT_BIT_FTRACE)
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#define EVENT_STATUS_PERF (1 << EVENT_BIT_PERF)
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#define EVENT_STATUS_OTHER (1 << EVENT_BIT_OTHER)
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/* Create dynamic location entry within a 32-bit value */
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#define DYN_LOC(offset, size) ((size) << 16 | (offset))
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/*
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* Describes an event registration and stores the results of the registration.
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* This structure is passed to the DIAG_IOCSREG ioctl, callers at a minimum
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* must set the size and name_args before invocation.
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*/
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struct user_reg {
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/* Input: Size of the user_reg structure being used */
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__u32 size;
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/* Input: Pointer to string with event name, description and flags */
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__u64 name_args;
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/* Output: Byte index of the event within the status page */
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__u32 status_index;
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/* Output: Index of the event to use when writing data */
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__u32 write_index;
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};
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#define DIAG_IOC_MAGIC '*'
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/* Requests to register a user_event */
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#define DIAG_IOCSREG _IOWR(DIAG_IOC_MAGIC, 0, struct user_reg*)
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/* Requests to delete a user_event */
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#define DIAG_IOCSDEL _IOW(DIAG_IOC_MAGIC, 1, char*)
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#endif /* _UAPI_LINUX_USER_EVENTS_H */
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