/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * include/linux/userfaultfd.h * * Copyright (C) 2007 Davide Libenzi <[email protected]> * Copyright (C) 2015 Red Hat, Inc. * */ #ifndef _LINUX_USERFAULTFD_H #define _LINUX_USERFAULTFD_H #include <linux/types.h> /* ioctls for /dev/userfaultfd */ #define USERFAULTFD_IOC … #define USERFAULTFD_IOC_NEW … /* * If the UFFDIO_API is upgraded someday, the UFFDIO_UNREGISTER and * UFFDIO_WAKE ioctls should be defined as _IOW and not as _IOR. In * userfaultfd.h we assumed the kernel was reading (instead _IOC_READ * means the userland is reading). */ #define UFFD_API … #define UFFD_API_REGISTER_MODES … #define UFFD_API_FEATURES … #define UFFD_API_IOCTLS … #define UFFD_API_RANGE_IOCTLS … #define UFFD_API_RANGE_IOCTLS_BASIC … /* * Valid ioctl command number range with this API is from 0x00 to * 0x3F. UFFDIO_API is the fixed number, everything else can be * changed by implementing a different UFFD_API. If sticking to the * same UFFD_API more ioctl can be added and userland will be aware of * which ioctl the running kernel implements through the ioctl command * bitmask written by the UFFDIO_API. */ #define _UFFDIO_REGISTER … #define _UFFDIO_UNREGISTER … #define _UFFDIO_WAKE … #define _UFFDIO_COPY … #define _UFFDIO_ZEROPAGE … #define _UFFDIO_MOVE … #define _UFFDIO_WRITEPROTECT … #define _UFFDIO_CONTINUE … #define _UFFDIO_POISON … #define _UFFDIO_API … /* userfaultfd ioctl ids */ #define UFFDIO … #define UFFDIO_API … #define UFFDIO_REGISTER … #define UFFDIO_UNREGISTER … #define UFFDIO_WAKE … #define UFFDIO_COPY … #define UFFDIO_ZEROPAGE … #define UFFDIO_MOVE … #define UFFDIO_WRITEPROTECT … #define UFFDIO_CONTINUE … #define UFFDIO_POISON … /* read() structure */ struct uffd_msg { … } __packed; /* * Start at 0x12 and not at 0 to be more strict against bugs. */ #define UFFD_EVENT_PAGEFAULT … #define UFFD_EVENT_FORK … #define UFFD_EVENT_REMAP … #define UFFD_EVENT_REMOVE … #define UFFD_EVENT_UNMAP … /* flags for UFFD_EVENT_PAGEFAULT */ #define UFFD_PAGEFAULT_FLAG_WRITE … #define UFFD_PAGEFAULT_FLAG_WP … #define UFFD_PAGEFAULT_FLAG_MINOR … struct uffdio_api { … }; struct uffdio_range { … }; struct uffdio_register { … }; struct uffdio_copy { … }; struct uffdio_zeropage { … }; struct uffdio_writeprotect { … }; struct uffdio_continue { … }; struct uffdio_poison { … }; struct uffdio_move { … }; /* * Flags for the userfaultfd(2) system call itself. */ /* * Create a userfaultfd that can handle page faults only in user mode. */ #define UFFD_USER_MODE_ONLY … #endif /* _LINUX_USERFAULTFD_H */
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