| /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ | |
| /* | |
| * include/linux/eventpoll.h ( Efficient event polling implementation ) | |
| * Copyright (C) 2001,...,2006 Davide Libenzi | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation; either version 2 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * Davide Libenzi <davidel@xmailserver.org> | |
| * | |
| */ | |
| #ifndef _UAPI_LINUX_EVENTPOLL_H | |
| #define _UAPI_LINUX_EVENTPOLL_H | |
| /* For O_CLOEXEC */ | |
| #include <linux/fcntl.h> | |
| #include <linux/types.h> | |
| /* Flags for epoll_create1. */ | |
| #define EPOLL_CLOEXEC O_CLOEXEC | |
| /* Valid opcodes to issue to sys_epoll_ctl() */ | |
| #define EPOLL_CTL_ADD 1 | |
| #define EPOLL_CTL_DEL 2 | |
| #define EPOLL_CTL_MOD 3 | |
| /* Epoll event masks */ | |
| #define EPOLLIN (__force __poll_t)0x00000001 | |
| #define EPOLLPRI (__force __poll_t)0x00000002 | |
| #define EPOLLOUT (__force __poll_t)0x00000004 | |
| #define EPOLLERR (__force __poll_t)0x00000008 | |
| #define EPOLLHUP (__force __poll_t)0x00000010 | |
| #define EPOLLNVAL (__force __poll_t)0x00000020 | |
| #define EPOLLRDNORM (__force __poll_t)0x00000040 | |
| #define EPOLLRDBAND (__force __poll_t)0x00000080 | |
| #define EPOLLWRNORM (__force __poll_t)0x00000100 | |
| #define EPOLLWRBAND (__force __poll_t)0x00000200 | |
| #define EPOLLMSG (__force __poll_t)0x00000400 | |
| #define EPOLLRDHUP (__force __poll_t)0x00002000 | |
| /* Set exclusive wakeup mode for the target file descriptor */ | |
| #define EPOLLEXCLUSIVE ((__force __poll_t)(1U << 28)) | |
| /* | |
| * Request the handling of system wakeup events so as to prevent system suspends | |
| * from happening while those events are being processed. | |
| * | |
| * Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be | |
| * re-allowed until epoll_wait is called again after consuming the wakeup | |
| * event(s). | |
| * | |
| * Requires CAP_BLOCK_SUSPEND | |
| */ | |
| #define EPOLLWAKEUP ((__force __poll_t)(1U << 29)) | |
| /* Set the One Shot behaviour for the target file descriptor */ | |
| #define EPOLLONESHOT ((__force __poll_t)(1U << 30)) | |
| /* Set the Edge Triggered behaviour for the target file descriptor */ | |
| #define EPOLLET ((__force __poll_t)(1U << 31)) | |
| /* | |
| * On x86-64 make the 64bit structure have the same alignment as the | |
| * 32bit structure. This makes 32bit emulation easier. | |
| * | |
| * UML/x86_64 needs the same packing as x86_64 | |
| */ | |
| #ifdef __x86_64__ | |
| #define EPOLL_PACKED __attribute__((packed)) | |
| #else | |
| #define EPOLL_PACKED | |
| #endif | |
| struct epoll_event { | |
| __poll_t events; | |
| __u64 data; | |
| } EPOLL_PACKED; | |
| #ifdef CONFIG_PM_SLEEP | |
| static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev) | |
| { | |
| if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND)) | |
| epev->events &= ~EPOLLWAKEUP; | |
| } | |
| #else | |
| static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev) | |
| { | |
| epev->events &= ~EPOLLWAKEUP; | |
| } | |
| #endif | |
| #endif /* _UAPI_LINUX_EVENTPOLL_H */ |