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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495/* 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_MULTI_SYSTEM "user_events_multi"#define USER_EVENTS_PREFIX "u:"
/* Create dynamic location entry within a 32-bit value */#define DYN_LOC(offset, size) ((size) << 16 | (offset))
/* List of supported registration flags */enum user_reg_flag { /* Event will not delete upon last reference closing */ USER_EVENT_REG_PERSIST = 1U << 0,
/* Event will be allowed to have multiple formats */ USER_EVENT_REG_MULTI_FORMAT = 1U << 1,
/* This value or above is currently non-ABI */ USER_EVENT_REG_MAX = 1U << 2,};
/* * 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: Bit in enable address to use */ __u8 enable_bit;
/* Input: Enable size in bytes at address */ __u8 enable_size;
/* Input: Flags to use, if any */ __u16 flags;
/* Input: Address to update when enabled */ __u64 enable_addr;
/* Input: Pointer to string with event name, description and flags */ __u64 name_args;
/* Output: Index of the event to use when writing data */ __u32 write_index;} __attribute__((__packed__));
/* * Describes an event unregister, callers must set the size, address and bit. * This structure is passed to the DIAG_IOCSUNREG ioctl to disable bit updates. */struct user_unreg { /* Input: Size of the user_unreg structure being used */ __u32 size;
/* Input: Bit to unregister */ __u8 disable_bit;
/* Input: Reserved, set to 0 */ __u8 __reserved;
/* Input: Reserved, set to 0 */ __u16 __reserved2;
/* Input: Address to unregister */ __u64 disable_addr;} __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 *)
/* Requests to unregister a user_event */#define DIAG_IOCSUNREG _IOW(DIAG_IOC_MAGIC, 2, struct user_unreg*)
#endif /* _UAPI_LINUX_USER_EVENTS_H */