[02/30] virtiofsd: Pull in kernel's fuse.h
diff mbox series

Message ID 20191021105832.36574-3-dgilbert@redhat.com
State New
Headers show
Series
  • virtiofs daemon (base)
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Commit Message

Dr. David Alan Gilbert Oct. 21, 2019, 10:58 a.m. UTC
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Pull in fuse.h from the kernel; version 97f9a3c4eee55b0178b518ae7114a6a53372913d

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 contrib/virtiofsd/fuse_kernel.h | 858 ++++++++++++++++++++++++++++++++
 1 file changed, 858 insertions(+)
 create mode 100644 contrib/virtiofsd/fuse_kernel.h

Comments

Michael S. Tsirkin Oct. 24, 2019, 11:10 a.m. UTC | #1
On Mon, Oct 21, 2019 at 11:58:04AM +0100, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> Pull in fuse.h from the kernel; version 97f9a3c4eee55b0178b518ae7114a6a53372913d
> 
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
>  contrib/virtiofsd/fuse_kernel.h | 858 ++++++++++++++++++++++++++++++++
>  1 file changed, 858 insertions(+)
>  create mode 100644 contrib/virtiofsd/fuse_kernel.h
> 
> diff --git a/contrib/virtiofsd/fuse_kernel.h b/contrib/virtiofsd/fuse_kernel.h
> new file mode 100644
> index 0000000000..802b0377a4
> --- /dev/null
> +++ b/contrib/virtiofsd/fuse_kernel.h
> @@ -0,0 +1,858 @@
> +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
> +/*
> +    This file defines the kernel interface of FUSE
> +    Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
> +
> +    This program can be distributed under the terms of the GNU GPL.
> +    See the file COPYING.

So I guess we need COPYING then?

> +    This -- and only this -- header file may also be distributed under
> +    the terms of the BSD Licence as follows:
> +
> +    Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
> +
> +    Redistribution and use in source and binary forms, with or without
> +    modification, are permitted provided that the following conditions
> +    are met:
> +    1. Redistributions of source code must retain the above copyright
> +       notice, this list of conditions and the following disclaimer.
> +    2. Redistributions in binary form must reproduce the above copyright
> +       notice, this list of conditions and the following disclaimer in the
> +       documentation and/or other materials provided with the distribution.
> +
> +    THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
> +    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> +    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> +    ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
> +    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> +    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> +    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> +    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> +    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> +    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> +    SUCH DAMAGE.
> +*/
> +
> +/*
> + * This file defines the kernel interface of FUSE
> + *
> + * Protocol changelog:
> + *
> + * 7.9:
> + *  - new fuse_getattr_in input argument of GETATTR
> + *  - add lk_flags in fuse_lk_in
> + *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
> + *  - add blksize field to fuse_attr
> + *  - add file flags field to fuse_read_in and fuse_write_in
> + *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
> + *
> + * 7.10
> + *  - add nonseekable open flag
> + *
> + * 7.11
> + *  - add IOCTL message
> + *  - add unsolicited notification support
> + *  - add POLL message and NOTIFY_POLL notification
> + *
> + * 7.12
> + *  - add umask flag to input argument of create, mknod and mkdir
> + *  - add notification messages for invalidation of inodes and
> + *    directory entries
> + *
> + * 7.13
> + *  - make max number of background requests and congestion threshold
> + *    tunables
> + *
> + * 7.14
> + *  - add splice support to fuse device
> + *
> + * 7.15
> + *  - add store notify
> + *  - add retrieve notify
> + *
> + * 7.16
> + *  - add BATCH_FORGET request
> + *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
> + *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
> + *  - add FUSE_IOCTL_32BIT flag
> + *
> + * 7.17
> + *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
> + *
> + * 7.18
> + *  - add FUSE_IOCTL_DIR flag
> + *  - add FUSE_NOTIFY_DELETE
> + *
> + * 7.19
> + *  - add FUSE_FALLOCATE
> + *
> + * 7.20
> + *  - add FUSE_AUTO_INVAL_DATA
> + *
> + * 7.21
> + *  - add FUSE_READDIRPLUS
> + *  - send the requested events in POLL request
> + *
> + * 7.22
> + *  - add FUSE_ASYNC_DIO
> + *
> + * 7.23
> + *  - add FUSE_WRITEBACK_CACHE
> + *  - add time_gran to fuse_init_out
> + *  - add reserved space to fuse_init_out
> + *  - add FATTR_CTIME
> + *  - add ctime and ctimensec to fuse_setattr_in
> + *  - add FUSE_RENAME2 request
> + *  - add FUSE_NO_OPEN_SUPPORT flag
> + *
> + *  7.24
> + *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
> + *
> + *  7.25
> + *  - add FUSE_PARALLEL_DIROPS
> + *
> + *  7.26
> + *  - add FUSE_HANDLE_KILLPRIV
> + *  - add FUSE_POSIX_ACL
> + *
> + *  7.27
> + *  - add FUSE_ABORT_ERROR
> + *
> + *  7.28
> + *  - add FUSE_COPY_FILE_RANGE
> + *  - add FOPEN_CACHE_DIR
> + *  - add FUSE_MAX_PAGES, add max_pages to init_out
> + *  - add FUSE_CACHE_SYMLINKS
> + *
> + *  7.29
> + *  - add FUSE_NO_OPENDIR_SUPPORT flag
> + *
> + *  7.30
> + *  - add FUSE_EXPLICIT_INVAL_DATA
> + *  - add FUSE_IOCTL_COMPAT_X32
> + *
> + *  7.31
> + *  - add FUSE_WRITE_KILL_PRIV flag
> + *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
> + *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
> + */
> +
> +#ifndef _LINUX_FUSE_H
> +#define _LINUX_FUSE_H
> +
> +#ifdef __KERNEL__
> +#include <linux/types.h>
> +#else
> +#include <stdint.h>
> +#endif
> +
> +/*
> + * Version negotiation:
> + *
> + * Both the kernel and userspace send the version they support in the
> + * INIT request and reply respectively.
> + *
> + * If the major versions match then both shall use the smallest
> + * of the two minor versions for communication.
> + *
> + * If the kernel supports a larger major version, then userspace shall
> + * reply with the major version it supports, ignore the rest of the
> + * INIT message and expect a new INIT message from the kernel with a
> + * matching major version.
> + *
> + * If the library supports a larger major version, then it shall fall
> + * back to the major protocol version sent by the kernel for
> + * communication and reply with that major version (and an arbitrary
> + * supported minor version).
> + */
> +
> +/** Version number of this interface */
> +#define FUSE_KERNEL_VERSION 7
> +
> +/** Minor version number of this interface */
> +#define FUSE_KERNEL_MINOR_VERSION 31
> +
> +/** The node ID of the root inode */
> +#define FUSE_ROOT_ID 1
> +
> +/* Make sure all structures are padded to 64bit boundary, so 32bit
> +   userspace works under 64bit kernels */
> +
> +struct fuse_attr {
> +	uint64_t	ino;
> +	uint64_t	size;
> +	uint64_t	blocks;
> +	uint64_t	atime;
> +	uint64_t	mtime;
> +	uint64_t	ctime;
> +	uint32_t	atimensec;
> +	uint32_t	mtimensec;
> +	uint32_t	ctimensec;
> +	uint32_t	mode;
> +	uint32_t	nlink;
> +	uint32_t	uid;
> +	uint32_t	gid;
> +	uint32_t	rdev;
> +	uint32_t	blksize;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_kstatfs {
> +	uint64_t	blocks;
> +	uint64_t	bfree;
> +	uint64_t	bavail;
> +	uint64_t	files;
> +	uint64_t	ffree;
> +	uint32_t	bsize;
> +	uint32_t	namelen;
> +	uint32_t	frsize;
> +	uint32_t	padding;
> +	uint32_t	spare[6];
> +};
> +
> +struct fuse_file_lock {
> +	uint64_t	start;
> +	uint64_t	end;
> +	uint32_t	type;
> +	uint32_t	pid; /* tgid */
> +};
> +
> +/**
> + * Bitmasks for fuse_setattr_in.valid
> + */
> +#define FATTR_MODE	(1 << 0)
> +#define FATTR_UID	(1 << 1)
> +#define FATTR_GID	(1 << 2)
> +#define FATTR_SIZE	(1 << 3)
> +#define FATTR_ATIME	(1 << 4)
> +#define FATTR_MTIME	(1 << 5)
> +#define FATTR_FH	(1 << 6)
> +#define FATTR_ATIME_NOW	(1 << 7)
> +#define FATTR_MTIME_NOW	(1 << 8)
> +#define FATTR_LOCKOWNER	(1 << 9)
> +#define FATTR_CTIME	(1 << 10)
> +
> +/**
> + * Flags returned by the OPEN request
> + *
> + * FOPEN_DIRECT_IO: bypass page cache for this open file
> + * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
> + * FOPEN_NONSEEKABLE: the file is not seekable
> + * FOPEN_CACHE_DIR: allow caching this directory
> + * FOPEN_STREAM: the file is stream-like (no file position at all)
> + */
> +#define FOPEN_DIRECT_IO		(1 << 0)
> +#define FOPEN_KEEP_CACHE	(1 << 1)
> +#define FOPEN_NONSEEKABLE	(1 << 2)
> +#define FOPEN_CACHE_DIR		(1 << 3)
> +#define FOPEN_STREAM		(1 << 4)
> +
> +/**
> + * INIT request/reply flags
> + *
> + * FUSE_ASYNC_READ: asynchronous read requests
> + * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
> + * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
> + * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
> + * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
> + * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
> + * FUSE_DONT_MASK: don't apply umask to file mode on create operations
> + * FUSE_SPLICE_WRITE: kernel supports splice write on the device
> + * FUSE_SPLICE_MOVE: kernel supports splice move on the device
> + * FUSE_SPLICE_READ: kernel supports splice read on the device
> + * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
> + * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
> + * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
> + * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
> + * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
> + * FUSE_ASYNC_DIO: asynchronous direct I/O submission
> + * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
> + * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
> + * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
> + * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
> + * FUSE_POSIX_ACL: filesystem supports posix acls
> + * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
> + * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
> + * FUSE_CACHE_SYMLINKS: cache READLINK responses
> + * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
> + * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
> + * FUSE_MAP_ALIGNMENT: map_alignment field is valid
> + */
> +#define FUSE_ASYNC_READ		(1 << 0)
> +#define FUSE_POSIX_LOCKS	(1 << 1)
> +#define FUSE_FILE_OPS		(1 << 2)
> +#define FUSE_ATOMIC_O_TRUNC	(1 << 3)
> +#define FUSE_EXPORT_SUPPORT	(1 << 4)
> +#define FUSE_BIG_WRITES		(1 << 5)
> +#define FUSE_DONT_MASK		(1 << 6)
> +#define FUSE_SPLICE_WRITE	(1 << 7)
> +#define FUSE_SPLICE_MOVE	(1 << 8)
> +#define FUSE_SPLICE_READ	(1 << 9)
> +#define FUSE_FLOCK_LOCKS	(1 << 10)
> +#define FUSE_HAS_IOCTL_DIR	(1 << 11)
> +#define FUSE_AUTO_INVAL_DATA	(1 << 12)
> +#define FUSE_DO_READDIRPLUS	(1 << 13)
> +#define FUSE_READDIRPLUS_AUTO	(1 << 14)
> +#define FUSE_ASYNC_DIO		(1 << 15)
> +#define FUSE_WRITEBACK_CACHE	(1 << 16)
> +#define FUSE_NO_OPEN_SUPPORT	(1 << 17)
> +#define FUSE_PARALLEL_DIROPS    (1 << 18)
> +#define FUSE_HANDLE_KILLPRIV	(1 << 19)
> +#define FUSE_POSIX_ACL		(1 << 20)
> +#define FUSE_ABORT_ERROR	(1 << 21)
> +#define FUSE_MAX_PAGES		(1 << 22)
> +#define FUSE_CACHE_SYMLINKS	(1 << 23)
> +#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
> +#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
> +#define FUSE_MAP_ALIGNMENT	(1 << 26)
> +
> +/**
> + * CUSE INIT request/reply flags
> + *
> + * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
> + */
> +#define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
> +
> +/**
> + * Release flags
> + */
> +#define FUSE_RELEASE_FLUSH	(1 << 0)
> +#define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
> +
> +/**
> + * Getattr flags
> + */
> +#define FUSE_GETATTR_FH		(1 << 0)
> +
> +/**
> + * Lock flags
> + */
> +#define FUSE_LK_FLOCK		(1 << 0)
> +
> +/**
> + * WRITE flags
> + *
> + * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
> + * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
> + * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
> + */
> +#define FUSE_WRITE_CACHE	(1 << 0)
> +#define FUSE_WRITE_LOCKOWNER	(1 << 1)
> +#define FUSE_WRITE_KILL_PRIV	(1 << 2)
> +
> +/**
> + * Read flags
> + */
> +#define FUSE_READ_LOCKOWNER	(1 << 1)
> +
> +/**
> + * Ioctl flags
> + *
> + * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
> + * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
> + * FUSE_IOCTL_RETRY: retry with new iovecs
> + * FUSE_IOCTL_32BIT: 32bit ioctl
> + * FUSE_IOCTL_DIR: is a directory
> + * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
> + *
> + * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
> + */
> +#define FUSE_IOCTL_COMPAT	(1 << 0)
> +#define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
> +#define FUSE_IOCTL_RETRY	(1 << 2)
> +#define FUSE_IOCTL_32BIT	(1 << 3)
> +#define FUSE_IOCTL_DIR		(1 << 4)
> +#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
> +
> +#define FUSE_IOCTL_MAX_IOV	256
> +
> +/**
> + * Poll flags
> + *
> + * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
> + */
> +#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
> +
> +/**
> + * Fsync flags
> + *
> + * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
> + */
> +#define FUSE_FSYNC_FDATASYNC	(1 << 0)
> +
> +enum fuse_opcode {
> +	FUSE_LOOKUP		= 1,
> +	FUSE_FORGET		= 2,  /* no reply */
> +	FUSE_GETATTR		= 3,
> +	FUSE_SETATTR		= 4,
> +	FUSE_READLINK		= 5,
> +	FUSE_SYMLINK		= 6,
> +	FUSE_MKNOD		= 8,
> +	FUSE_MKDIR		= 9,
> +	FUSE_UNLINK		= 10,
> +	FUSE_RMDIR		= 11,
> +	FUSE_RENAME		= 12,
> +	FUSE_LINK		= 13,
> +	FUSE_OPEN		= 14,
> +	FUSE_READ		= 15,
> +	FUSE_WRITE		= 16,
> +	FUSE_STATFS		= 17,
> +	FUSE_RELEASE		= 18,
> +	FUSE_FSYNC		= 20,
> +	FUSE_SETXATTR		= 21,
> +	FUSE_GETXATTR		= 22,
> +	FUSE_LISTXATTR		= 23,
> +	FUSE_REMOVEXATTR	= 24,
> +	FUSE_FLUSH		= 25,
> +	FUSE_INIT		= 26,
> +	FUSE_OPENDIR		= 27,
> +	FUSE_READDIR		= 28,
> +	FUSE_RELEASEDIR		= 29,
> +	FUSE_FSYNCDIR		= 30,
> +	FUSE_GETLK		= 31,
> +	FUSE_SETLK		= 32,
> +	FUSE_SETLKW		= 33,
> +	FUSE_ACCESS		= 34,
> +	FUSE_CREATE		= 35,
> +	FUSE_INTERRUPT		= 36,
> +	FUSE_BMAP		= 37,
> +	FUSE_DESTROY		= 38,
> +	FUSE_IOCTL		= 39,
> +	FUSE_POLL		= 40,
> +	FUSE_NOTIFY_REPLY	= 41,
> +	FUSE_BATCH_FORGET	= 42,
> +	FUSE_FALLOCATE		= 43,
> +	FUSE_READDIRPLUS	= 44,
> +	FUSE_RENAME2		= 45,
> +	FUSE_LSEEK		= 46,
> +	FUSE_COPY_FILE_RANGE	= 47,
> +	FUSE_SETUPMAPPING	= 48,
> +	FUSE_REMOVEMAPPING	= 49,
> +
> +	/* CUSE specific operations */
> +	CUSE_INIT		= 4096,
> +
> +	/* Reserved opcodes: helpful to detect structure endian-ness */
> +	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
> +	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
> +};
> +
> +enum fuse_notify_code {
> +	FUSE_NOTIFY_POLL   = 1,
> +	FUSE_NOTIFY_INVAL_INODE = 2,
> +	FUSE_NOTIFY_INVAL_ENTRY = 3,
> +	FUSE_NOTIFY_STORE = 4,
> +	FUSE_NOTIFY_RETRIEVE = 5,
> +	FUSE_NOTIFY_DELETE = 6,
> +	FUSE_NOTIFY_CODE_MAX,
> +};
> +
> +/* The read buffer is required to be at least 8k, but may be much larger */
> +#define FUSE_MIN_READ_BUFFER 8192
> +
> +#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
> +
> +struct fuse_entry_out {
> +	uint64_t	nodeid;		/* Inode ID */
> +	uint64_t	generation;	/* Inode generation: nodeid:gen must
> +					   be unique for the fs's lifetime */
> +	uint64_t	entry_valid;	/* Cache timeout for the name */
> +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> +	uint32_t	entry_valid_nsec;
> +	uint32_t	attr_valid_nsec;
> +	struct fuse_attr attr;
> +};
> +
> +struct fuse_forget_in {
> +	uint64_t	nlookup;
> +};
> +
> +struct fuse_forget_one {
> +	uint64_t	nodeid;
> +	uint64_t	nlookup;
> +};
> +
> +struct fuse_batch_forget_in {
> +	uint32_t	count;
> +	uint32_t	dummy;
> +};
> +
> +struct fuse_getattr_in {
> +	uint32_t	getattr_flags;
> +	uint32_t	dummy;
> +	uint64_t	fh;
> +};
> +
> +#define FUSE_COMPAT_ATTR_OUT_SIZE 96
> +
> +struct fuse_attr_out {
> +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> +	uint32_t	attr_valid_nsec;
> +	uint32_t	dummy;
> +	struct fuse_attr attr;
> +};
> +
> +#define FUSE_COMPAT_MKNOD_IN_SIZE 8
> +
> +struct fuse_mknod_in {
> +	uint32_t	mode;
> +	uint32_t	rdev;
> +	uint32_t	umask;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_mkdir_in {
> +	uint32_t	mode;
> +	uint32_t	umask;
> +};
> +
> +struct fuse_rename_in {
> +	uint64_t	newdir;
> +};
> +
> +struct fuse_rename2_in {
> +	uint64_t	newdir;
> +	uint32_t	flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_link_in {
> +	uint64_t	oldnodeid;
> +};
> +
> +struct fuse_setattr_in {
> +	uint32_t	valid;
> +	uint32_t	padding;
> +	uint64_t	fh;
> +	uint64_t	size;
> +	uint64_t	lock_owner;
> +	uint64_t	atime;
> +	uint64_t	mtime;
> +	uint64_t	ctime;
> +	uint32_t	atimensec;
> +	uint32_t	mtimensec;
> +	uint32_t	ctimensec;
> +	uint32_t	mode;
> +	uint32_t	unused4;
> +	uint32_t	uid;
> +	uint32_t	gid;
> +	uint32_t	unused5;
> +};
> +
> +struct fuse_open_in {
> +	uint32_t	flags;
> +	uint32_t	unused;
> +};
> +
> +struct fuse_create_in {
> +	uint32_t	flags;
> +	uint32_t	mode;
> +	uint32_t	umask;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_open_out {
> +	uint64_t	fh;
> +	uint32_t	open_flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_release_in {
> +	uint64_t	fh;
> +	uint32_t	flags;
> +	uint32_t	release_flags;
> +	uint64_t	lock_owner;
> +};
> +
> +struct fuse_flush_in {
> +	uint64_t	fh;
> +	uint32_t	unused;
> +	uint32_t	padding;
> +	uint64_t	lock_owner;
> +};
> +
> +struct fuse_read_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	read_flags;
> +	uint64_t	lock_owner;
> +	uint32_t	flags;
> +	uint32_t	padding;
> +};
> +
> +#define FUSE_COMPAT_WRITE_IN_SIZE 24
> +
> +struct fuse_write_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	write_flags;
> +	uint64_t	lock_owner;
> +	uint32_t	flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_write_out {
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +#define FUSE_COMPAT_STATFS_SIZE 48
> +
> +struct fuse_statfs_out {
> +	struct fuse_kstatfs st;
> +};
> +
> +struct fuse_fsync_in {
> +	uint64_t	fh;
> +	uint32_t	fsync_flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_setxattr_in {
> +	uint32_t	size;
> +	uint32_t	flags;
> +};
> +
> +struct fuse_getxattr_in {
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_getxattr_out {
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_lk_in {
> +	uint64_t	fh;
> +	uint64_t	owner;
> +	struct fuse_file_lock lk;
> +	uint32_t	lk_flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_lk_out {
> +	struct fuse_file_lock lk;
> +};
> +
> +struct fuse_access_in {
> +	uint32_t	mask;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_init_in {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	max_readahead;
> +	uint32_t	flags;
> +};
> +
> +#define FUSE_COMPAT_INIT_OUT_SIZE 8
> +#define FUSE_COMPAT_22_INIT_OUT_SIZE 24
> +
> +struct fuse_init_out {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	max_readahead;
> +	uint32_t	flags;
> +	uint16_t	max_background;
> +	uint16_t	congestion_threshold;
> +	uint32_t	max_write;
> +	uint32_t	time_gran;
> +	uint16_t	max_pages;
> +	uint16_t	map_alignment;
> +	uint32_t	unused[8];
> +};
> +
> +#define CUSE_INIT_INFO_MAX 4096
> +
> +struct cuse_init_in {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	unused;
> +	uint32_t	flags;
> +};
> +
> +struct cuse_init_out {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	unused;
> +	uint32_t	flags;
> +	uint32_t	max_read;
> +	uint32_t	max_write;
> +	uint32_t	dev_major;		/* chardev major */
> +	uint32_t	dev_minor;		/* chardev minor */
> +	uint32_t	spare[10];
> +};
> +
> +struct fuse_interrupt_in {
> +	uint64_t	unique;
> +};
> +
> +struct fuse_bmap_in {
> +	uint64_t	block;
> +	uint32_t	blocksize;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_bmap_out {
> +	uint64_t	block;
> +};
> +
> +struct fuse_ioctl_in {
> +	uint64_t	fh;
> +	uint32_t	flags;
> +	uint32_t	cmd;
> +	uint64_t	arg;
> +	uint32_t	in_size;
> +	uint32_t	out_size;
> +};
> +
> +struct fuse_ioctl_iovec {
> +	uint64_t	base;
> +	uint64_t	len;
> +};
> +
> +struct fuse_ioctl_out {
> +	int32_t		result;
> +	uint32_t	flags;
> +	uint32_t	in_iovs;
> +	uint32_t	out_iovs;
> +};
> +
> +struct fuse_poll_in {
> +	uint64_t	fh;
> +	uint64_t	kh;
> +	uint32_t	flags;
> +	uint32_t	events;
> +};
> +
> +struct fuse_poll_out {
> +	uint32_t	revents;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_poll_wakeup_out {
> +	uint64_t	kh;
> +};
> +
> +struct fuse_fallocate_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint64_t	length;
> +	uint32_t	mode;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_in_header {
> +	uint32_t	len;
> +	uint32_t	opcode;
> +	uint64_t	unique;
> +	uint64_t	nodeid;
> +	uint32_t	uid;
> +	uint32_t	gid;
> +	uint32_t	pid;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_out_header {
> +	uint32_t	len;
> +	int32_t		error;
> +	uint64_t	unique;
> +};
> +
> +struct fuse_dirent {
> +	uint64_t	ino;
> +	uint64_t	off;
> +	uint32_t	namelen;
> +	uint32_t	type;
> +	char name[];
> +};
> +
> +#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
> +#define FUSE_DIRENT_ALIGN(x) \
> +	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
> +#define FUSE_DIRENT_SIZE(d) \
> +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
> +
> +struct fuse_direntplus {
> +	struct fuse_entry_out entry_out;
> +	struct fuse_dirent dirent;
> +};
> +
> +#define FUSE_NAME_OFFSET_DIRENTPLUS \
> +	offsetof(struct fuse_direntplus, dirent.name)
> +#define FUSE_DIRENTPLUS_SIZE(d) \
> +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
> +
> +struct fuse_notify_inval_inode_out {
> +	uint64_t	ino;
> +	int64_t		off;
> +	int64_t		len;
> +};
> +
> +struct fuse_notify_inval_entry_out {
> +	uint64_t	parent;
> +	uint32_t	namelen;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_delete_out {
> +	uint64_t	parent;
> +	uint64_t	child;
> +	uint32_t	namelen;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_store_out {
> +	uint64_t	nodeid;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_retrieve_out {
> +	uint64_t	notify_unique;
> +	uint64_t	nodeid;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +/* Matches the size of fuse_write_in */
> +struct fuse_notify_retrieve_in {
> +	uint64_t	dummy1;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	dummy2;
> +	uint64_t	dummy3;
> +	uint64_t	dummy4;
> +};
> +
> +/* Device ioctls: */
> +#define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
> +
> +struct fuse_lseek_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint32_t	whence;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_lseek_out {
> +	uint64_t	offset;
> +};
> +
> +struct fuse_copy_file_range_in {
> +	uint64_t	fh_in;
> +	uint64_t	off_in;
> +	uint64_t	nodeid_out;
> +	uint64_t	fh_out;
> +	uint64_t	off_out;
> +	uint64_t	len;
> +	uint64_t	flags;
> +};
> +
> +#endif /* _LINUX_FUSE_H */
> -- 
> 2.23.0
Michael S. Tsirkin Oct. 24, 2019, 11:13 a.m. UTC | #2
On Mon, Oct 21, 2019 at 11:58:04AM +0100, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> Pull in fuse.h from the kernel; version 97f9a3c4eee55b0178b518ae7114a6a53372913d

How about using some tag instead?

> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
>  contrib/virtiofsd/fuse_kernel.h | 858 ++++++++++++++++++++++++++++++++
>  1 file changed, 858 insertions(+)
>  create mode 100644 contrib/virtiofsd/fuse_kernel.h
> 
> diff --git a/contrib/virtiofsd/fuse_kernel.h b/contrib/virtiofsd/fuse_kernel.h
> new file mode 100644
> index 0000000000..802b0377a4
> --- /dev/null
> +++ b/contrib/virtiofsd/fuse_kernel.h
> @@ -0,0 +1,858 @@
> +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
> +/*
> +    This file defines the kernel interface of FUSE
> +    Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
> +
> +    This program can be distributed under the terms of the GNU GPL.
> +    See the file COPYING.
> +
> +    This -- and only this -- header file may also be distributed under
> +    the terms of the BSD Licence as follows:
> +
> +    Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
> +
> +    Redistribution and use in source and binary forms, with or without
> +    modification, are permitted provided that the following conditions
> +    are met:
> +    1. Redistributions of source code must retain the above copyright
> +       notice, this list of conditions and the following disclaimer.
> +    2. Redistributions in binary form must reproduce the above copyright
> +       notice, this list of conditions and the following disclaimer in the
> +       documentation and/or other materials provided with the distribution.
> +
> +    THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
> +    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> +    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> +    ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
> +    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> +    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> +    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> +    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> +    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> +    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> +    SUCH DAMAGE.
> +*/
> +
> +/*
> + * This file defines the kernel interface of FUSE
> + *
> + * Protocol changelog:
> + *
> + * 7.9:
> + *  - new fuse_getattr_in input argument of GETATTR
> + *  - add lk_flags in fuse_lk_in
> + *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
> + *  - add blksize field to fuse_attr
> + *  - add file flags field to fuse_read_in and fuse_write_in
> + *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
> + *
> + * 7.10
> + *  - add nonseekable open flag
> + *
> + * 7.11
> + *  - add IOCTL message
> + *  - add unsolicited notification support
> + *  - add POLL message and NOTIFY_POLL notification
> + *
> + * 7.12
> + *  - add umask flag to input argument of create, mknod and mkdir
> + *  - add notification messages for invalidation of inodes and
> + *    directory entries
> + *
> + * 7.13
> + *  - make max number of background requests and congestion threshold
> + *    tunables
> + *
> + * 7.14
> + *  - add splice support to fuse device
> + *
> + * 7.15
> + *  - add store notify
> + *  - add retrieve notify
> + *
> + * 7.16
> + *  - add BATCH_FORGET request
> + *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
> + *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
> + *  - add FUSE_IOCTL_32BIT flag
> + *
> + * 7.17
> + *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
> + *
> + * 7.18
> + *  - add FUSE_IOCTL_DIR flag
> + *  - add FUSE_NOTIFY_DELETE
> + *
> + * 7.19
> + *  - add FUSE_FALLOCATE
> + *
> + * 7.20
> + *  - add FUSE_AUTO_INVAL_DATA
> + *
> + * 7.21
> + *  - add FUSE_READDIRPLUS
> + *  - send the requested events in POLL request
> + *
> + * 7.22
> + *  - add FUSE_ASYNC_DIO
> + *
> + * 7.23
> + *  - add FUSE_WRITEBACK_CACHE
> + *  - add time_gran to fuse_init_out
> + *  - add reserved space to fuse_init_out
> + *  - add FATTR_CTIME
> + *  - add ctime and ctimensec to fuse_setattr_in
> + *  - add FUSE_RENAME2 request
> + *  - add FUSE_NO_OPEN_SUPPORT flag
> + *
> + *  7.24
> + *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
> + *
> + *  7.25
> + *  - add FUSE_PARALLEL_DIROPS
> + *
> + *  7.26
> + *  - add FUSE_HANDLE_KILLPRIV
> + *  - add FUSE_POSIX_ACL
> + *
> + *  7.27
> + *  - add FUSE_ABORT_ERROR
> + *
> + *  7.28
> + *  - add FUSE_COPY_FILE_RANGE
> + *  - add FOPEN_CACHE_DIR
> + *  - add FUSE_MAX_PAGES, add max_pages to init_out
> + *  - add FUSE_CACHE_SYMLINKS
> + *
> + *  7.29
> + *  - add FUSE_NO_OPENDIR_SUPPORT flag
> + *
> + *  7.30
> + *  - add FUSE_EXPLICIT_INVAL_DATA
> + *  - add FUSE_IOCTL_COMPAT_X32
> + *
> + *  7.31
> + *  - add FUSE_WRITE_KILL_PRIV flag
> + *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
> + *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
> + */
> +
> +#ifndef _LINUX_FUSE_H
> +#define _LINUX_FUSE_H
> +
> +#ifdef __KERNEL__
> +#include <linux/types.h>
> +#else
> +#include <stdint.h>
> +#endif
> +
> +/*
> + * Version negotiation:
> + *
> + * Both the kernel and userspace send the version they support in the
> + * INIT request and reply respectively.
> + *
> + * If the major versions match then both shall use the smallest
> + * of the two minor versions for communication.
> + *
> + * If the kernel supports a larger major version, then userspace shall
> + * reply with the major version it supports, ignore the rest of the
> + * INIT message and expect a new INIT message from the kernel with a
> + * matching major version.
> + *
> + * If the library supports a larger major version, then it shall fall
> + * back to the major protocol version sent by the kernel for
> + * communication and reply with that major version (and an arbitrary
> + * supported minor version).
> + */
> +
> +/** Version number of this interface */
> +#define FUSE_KERNEL_VERSION 7
> +
> +/** Minor version number of this interface */
> +#define FUSE_KERNEL_MINOR_VERSION 31
> +
> +/** The node ID of the root inode */
> +#define FUSE_ROOT_ID 1
> +
> +/* Make sure all structures are padded to 64bit boundary, so 32bit
> +   userspace works under 64bit kernels */
> +
> +struct fuse_attr {
> +	uint64_t	ino;
> +	uint64_t	size;
> +	uint64_t	blocks;
> +	uint64_t	atime;
> +	uint64_t	mtime;
> +	uint64_t	ctime;
> +	uint32_t	atimensec;
> +	uint32_t	mtimensec;
> +	uint32_t	ctimensec;
> +	uint32_t	mode;
> +	uint32_t	nlink;
> +	uint32_t	uid;
> +	uint32_t	gid;
> +	uint32_t	rdev;
> +	uint32_t	blksize;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_kstatfs {
> +	uint64_t	blocks;
> +	uint64_t	bfree;
> +	uint64_t	bavail;
> +	uint64_t	files;
> +	uint64_t	ffree;
> +	uint32_t	bsize;
> +	uint32_t	namelen;
> +	uint32_t	frsize;
> +	uint32_t	padding;
> +	uint32_t	spare[6];
> +};
> +
> +struct fuse_file_lock {
> +	uint64_t	start;
> +	uint64_t	end;
> +	uint32_t	type;
> +	uint32_t	pid; /* tgid */
> +};
> +
> +/**
> + * Bitmasks for fuse_setattr_in.valid
> + */
> +#define FATTR_MODE	(1 << 0)
> +#define FATTR_UID	(1 << 1)
> +#define FATTR_GID	(1 << 2)
> +#define FATTR_SIZE	(1 << 3)
> +#define FATTR_ATIME	(1 << 4)
> +#define FATTR_MTIME	(1 << 5)
> +#define FATTR_FH	(1 << 6)
> +#define FATTR_ATIME_NOW	(1 << 7)
> +#define FATTR_MTIME_NOW	(1 << 8)
> +#define FATTR_LOCKOWNER	(1 << 9)
> +#define FATTR_CTIME	(1 << 10)
> +
> +/**
> + * Flags returned by the OPEN request
> + *
> + * FOPEN_DIRECT_IO: bypass page cache for this open file
> + * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
> + * FOPEN_NONSEEKABLE: the file is not seekable
> + * FOPEN_CACHE_DIR: allow caching this directory
> + * FOPEN_STREAM: the file is stream-like (no file position at all)
> + */
> +#define FOPEN_DIRECT_IO		(1 << 0)
> +#define FOPEN_KEEP_CACHE	(1 << 1)
> +#define FOPEN_NONSEEKABLE	(1 << 2)
> +#define FOPEN_CACHE_DIR		(1 << 3)
> +#define FOPEN_STREAM		(1 << 4)
> +
> +/**
> + * INIT request/reply flags
> + *
> + * FUSE_ASYNC_READ: asynchronous read requests
> + * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
> + * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
> + * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
> + * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
> + * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
> + * FUSE_DONT_MASK: don't apply umask to file mode on create operations
> + * FUSE_SPLICE_WRITE: kernel supports splice write on the device
> + * FUSE_SPLICE_MOVE: kernel supports splice move on the device
> + * FUSE_SPLICE_READ: kernel supports splice read on the device
> + * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
> + * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
> + * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
> + * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
> + * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
> + * FUSE_ASYNC_DIO: asynchronous direct I/O submission
> + * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
> + * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
> + * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
> + * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
> + * FUSE_POSIX_ACL: filesystem supports posix acls
> + * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
> + * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
> + * FUSE_CACHE_SYMLINKS: cache READLINK responses
> + * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
> + * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
> + * FUSE_MAP_ALIGNMENT: map_alignment field is valid
> + */
> +#define FUSE_ASYNC_READ		(1 << 0)
> +#define FUSE_POSIX_LOCKS	(1 << 1)
> +#define FUSE_FILE_OPS		(1 << 2)
> +#define FUSE_ATOMIC_O_TRUNC	(1 << 3)
> +#define FUSE_EXPORT_SUPPORT	(1 << 4)
> +#define FUSE_BIG_WRITES		(1 << 5)
> +#define FUSE_DONT_MASK		(1 << 6)
> +#define FUSE_SPLICE_WRITE	(1 << 7)
> +#define FUSE_SPLICE_MOVE	(1 << 8)
> +#define FUSE_SPLICE_READ	(1 << 9)
> +#define FUSE_FLOCK_LOCKS	(1 << 10)
> +#define FUSE_HAS_IOCTL_DIR	(1 << 11)
> +#define FUSE_AUTO_INVAL_DATA	(1 << 12)
> +#define FUSE_DO_READDIRPLUS	(1 << 13)
> +#define FUSE_READDIRPLUS_AUTO	(1 << 14)
> +#define FUSE_ASYNC_DIO		(1 << 15)
> +#define FUSE_WRITEBACK_CACHE	(1 << 16)
> +#define FUSE_NO_OPEN_SUPPORT	(1 << 17)
> +#define FUSE_PARALLEL_DIROPS    (1 << 18)
> +#define FUSE_HANDLE_KILLPRIV	(1 << 19)
> +#define FUSE_POSIX_ACL		(1 << 20)
> +#define FUSE_ABORT_ERROR	(1 << 21)
> +#define FUSE_MAX_PAGES		(1 << 22)
> +#define FUSE_CACHE_SYMLINKS	(1 << 23)
> +#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
> +#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
> +#define FUSE_MAP_ALIGNMENT	(1 << 26)
> +
> +/**
> + * CUSE INIT request/reply flags
> + *
> + * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
> + */
> +#define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
> +
> +/**
> + * Release flags
> + */
> +#define FUSE_RELEASE_FLUSH	(1 << 0)
> +#define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
> +
> +/**
> + * Getattr flags
> + */
> +#define FUSE_GETATTR_FH		(1 << 0)
> +
> +/**
> + * Lock flags
> + */
> +#define FUSE_LK_FLOCK		(1 << 0)
> +
> +/**
> + * WRITE flags
> + *
> + * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
> + * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
> + * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
> + */
> +#define FUSE_WRITE_CACHE	(1 << 0)
> +#define FUSE_WRITE_LOCKOWNER	(1 << 1)
> +#define FUSE_WRITE_KILL_PRIV	(1 << 2)
> +
> +/**
> + * Read flags
> + */
> +#define FUSE_READ_LOCKOWNER	(1 << 1)
> +
> +/**
> + * Ioctl flags
> + *
> + * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
> + * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
> + * FUSE_IOCTL_RETRY: retry with new iovecs
> + * FUSE_IOCTL_32BIT: 32bit ioctl
> + * FUSE_IOCTL_DIR: is a directory
> + * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
> + *
> + * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
> + */
> +#define FUSE_IOCTL_COMPAT	(1 << 0)
> +#define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
> +#define FUSE_IOCTL_RETRY	(1 << 2)
> +#define FUSE_IOCTL_32BIT	(1 << 3)
> +#define FUSE_IOCTL_DIR		(1 << 4)
> +#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
> +
> +#define FUSE_IOCTL_MAX_IOV	256
> +
> +/**
> + * Poll flags
> + *
> + * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
> + */
> +#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
> +
> +/**
> + * Fsync flags
> + *
> + * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
> + */
> +#define FUSE_FSYNC_FDATASYNC	(1 << 0)
> +
> +enum fuse_opcode {
> +	FUSE_LOOKUP		= 1,
> +	FUSE_FORGET		= 2,  /* no reply */
> +	FUSE_GETATTR		= 3,
> +	FUSE_SETATTR		= 4,
> +	FUSE_READLINK		= 5,
> +	FUSE_SYMLINK		= 6,
> +	FUSE_MKNOD		= 8,
> +	FUSE_MKDIR		= 9,
> +	FUSE_UNLINK		= 10,
> +	FUSE_RMDIR		= 11,
> +	FUSE_RENAME		= 12,
> +	FUSE_LINK		= 13,
> +	FUSE_OPEN		= 14,
> +	FUSE_READ		= 15,
> +	FUSE_WRITE		= 16,
> +	FUSE_STATFS		= 17,
> +	FUSE_RELEASE		= 18,
> +	FUSE_FSYNC		= 20,
> +	FUSE_SETXATTR		= 21,
> +	FUSE_GETXATTR		= 22,
> +	FUSE_LISTXATTR		= 23,
> +	FUSE_REMOVEXATTR	= 24,
> +	FUSE_FLUSH		= 25,
> +	FUSE_INIT		= 26,
> +	FUSE_OPENDIR		= 27,
> +	FUSE_READDIR		= 28,
> +	FUSE_RELEASEDIR		= 29,
> +	FUSE_FSYNCDIR		= 30,
> +	FUSE_GETLK		= 31,
> +	FUSE_SETLK		= 32,
> +	FUSE_SETLKW		= 33,
> +	FUSE_ACCESS		= 34,
> +	FUSE_CREATE		= 35,
> +	FUSE_INTERRUPT		= 36,
> +	FUSE_BMAP		= 37,
> +	FUSE_DESTROY		= 38,
> +	FUSE_IOCTL		= 39,
> +	FUSE_POLL		= 40,
> +	FUSE_NOTIFY_REPLY	= 41,
> +	FUSE_BATCH_FORGET	= 42,
> +	FUSE_FALLOCATE		= 43,
> +	FUSE_READDIRPLUS	= 44,
> +	FUSE_RENAME2		= 45,
> +	FUSE_LSEEK		= 46,
> +	FUSE_COPY_FILE_RANGE	= 47,
> +	FUSE_SETUPMAPPING	= 48,
> +	FUSE_REMOVEMAPPING	= 49,
> +
> +	/* CUSE specific operations */
> +	CUSE_INIT		= 4096,
> +
> +	/* Reserved opcodes: helpful to detect structure endian-ness */
> +	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
> +	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
> +};
> +
> +enum fuse_notify_code {
> +	FUSE_NOTIFY_POLL   = 1,
> +	FUSE_NOTIFY_INVAL_INODE = 2,
> +	FUSE_NOTIFY_INVAL_ENTRY = 3,
> +	FUSE_NOTIFY_STORE = 4,
> +	FUSE_NOTIFY_RETRIEVE = 5,
> +	FUSE_NOTIFY_DELETE = 6,
> +	FUSE_NOTIFY_CODE_MAX,
> +};
> +
> +/* The read buffer is required to be at least 8k, but may be much larger */
> +#define FUSE_MIN_READ_BUFFER 8192
> +
> +#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
> +
> +struct fuse_entry_out {
> +	uint64_t	nodeid;		/* Inode ID */
> +	uint64_t	generation;	/* Inode generation: nodeid:gen must
> +					   be unique for the fs's lifetime */
> +	uint64_t	entry_valid;	/* Cache timeout for the name */
> +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> +	uint32_t	entry_valid_nsec;
> +	uint32_t	attr_valid_nsec;
> +	struct fuse_attr attr;
> +};
> +
> +struct fuse_forget_in {
> +	uint64_t	nlookup;
> +};
> +
> +struct fuse_forget_one {
> +	uint64_t	nodeid;
> +	uint64_t	nlookup;
> +};
> +
> +struct fuse_batch_forget_in {
> +	uint32_t	count;
> +	uint32_t	dummy;
> +};
> +
> +struct fuse_getattr_in {
> +	uint32_t	getattr_flags;
> +	uint32_t	dummy;
> +	uint64_t	fh;
> +};
> +
> +#define FUSE_COMPAT_ATTR_OUT_SIZE 96
> +
> +struct fuse_attr_out {
> +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> +	uint32_t	attr_valid_nsec;
> +	uint32_t	dummy;
> +	struct fuse_attr attr;
> +};
> +
> +#define FUSE_COMPAT_MKNOD_IN_SIZE 8
> +
> +struct fuse_mknod_in {
> +	uint32_t	mode;
> +	uint32_t	rdev;
> +	uint32_t	umask;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_mkdir_in {
> +	uint32_t	mode;
> +	uint32_t	umask;
> +};
> +
> +struct fuse_rename_in {
> +	uint64_t	newdir;
> +};
> +
> +struct fuse_rename2_in {
> +	uint64_t	newdir;
> +	uint32_t	flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_link_in {
> +	uint64_t	oldnodeid;
> +};
> +
> +struct fuse_setattr_in {
> +	uint32_t	valid;
> +	uint32_t	padding;
> +	uint64_t	fh;
> +	uint64_t	size;
> +	uint64_t	lock_owner;
> +	uint64_t	atime;
> +	uint64_t	mtime;
> +	uint64_t	ctime;
> +	uint32_t	atimensec;
> +	uint32_t	mtimensec;
> +	uint32_t	ctimensec;
> +	uint32_t	mode;
> +	uint32_t	unused4;
> +	uint32_t	uid;
> +	uint32_t	gid;
> +	uint32_t	unused5;
> +};
> +
> +struct fuse_open_in {
> +	uint32_t	flags;
> +	uint32_t	unused;
> +};
> +
> +struct fuse_create_in {
> +	uint32_t	flags;
> +	uint32_t	mode;
> +	uint32_t	umask;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_open_out {
> +	uint64_t	fh;
> +	uint32_t	open_flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_release_in {
> +	uint64_t	fh;
> +	uint32_t	flags;
> +	uint32_t	release_flags;
> +	uint64_t	lock_owner;
> +};
> +
> +struct fuse_flush_in {
> +	uint64_t	fh;
> +	uint32_t	unused;
> +	uint32_t	padding;
> +	uint64_t	lock_owner;
> +};
> +
> +struct fuse_read_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	read_flags;
> +	uint64_t	lock_owner;
> +	uint32_t	flags;
> +	uint32_t	padding;
> +};
> +
> +#define FUSE_COMPAT_WRITE_IN_SIZE 24
> +
> +struct fuse_write_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	write_flags;
> +	uint64_t	lock_owner;
> +	uint32_t	flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_write_out {
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +#define FUSE_COMPAT_STATFS_SIZE 48
> +
> +struct fuse_statfs_out {
> +	struct fuse_kstatfs st;
> +};
> +
> +struct fuse_fsync_in {
> +	uint64_t	fh;
> +	uint32_t	fsync_flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_setxattr_in {
> +	uint32_t	size;
> +	uint32_t	flags;
> +};
> +
> +struct fuse_getxattr_in {
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_getxattr_out {
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_lk_in {
> +	uint64_t	fh;
> +	uint64_t	owner;
> +	struct fuse_file_lock lk;
> +	uint32_t	lk_flags;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_lk_out {
> +	struct fuse_file_lock lk;
> +};
> +
> +struct fuse_access_in {
> +	uint32_t	mask;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_init_in {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	max_readahead;
> +	uint32_t	flags;
> +};
> +
> +#define FUSE_COMPAT_INIT_OUT_SIZE 8
> +#define FUSE_COMPAT_22_INIT_OUT_SIZE 24
> +
> +struct fuse_init_out {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	max_readahead;
> +	uint32_t	flags;
> +	uint16_t	max_background;
> +	uint16_t	congestion_threshold;
> +	uint32_t	max_write;
> +	uint32_t	time_gran;
> +	uint16_t	max_pages;
> +	uint16_t	map_alignment;
> +	uint32_t	unused[8];
> +};
> +
> +#define CUSE_INIT_INFO_MAX 4096
> +
> +struct cuse_init_in {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	unused;
> +	uint32_t	flags;
> +};
> +
> +struct cuse_init_out {
> +	uint32_t	major;
> +	uint32_t	minor;
> +	uint32_t	unused;
> +	uint32_t	flags;
> +	uint32_t	max_read;
> +	uint32_t	max_write;
> +	uint32_t	dev_major;		/* chardev major */
> +	uint32_t	dev_minor;		/* chardev minor */
> +	uint32_t	spare[10];
> +};
> +
> +struct fuse_interrupt_in {
> +	uint64_t	unique;
> +};
> +
> +struct fuse_bmap_in {
> +	uint64_t	block;
> +	uint32_t	blocksize;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_bmap_out {
> +	uint64_t	block;
> +};
> +
> +struct fuse_ioctl_in {
> +	uint64_t	fh;
> +	uint32_t	flags;
> +	uint32_t	cmd;
> +	uint64_t	arg;
> +	uint32_t	in_size;
> +	uint32_t	out_size;
> +};
> +
> +struct fuse_ioctl_iovec {
> +	uint64_t	base;
> +	uint64_t	len;
> +};
> +
> +struct fuse_ioctl_out {
> +	int32_t		result;
> +	uint32_t	flags;
> +	uint32_t	in_iovs;
> +	uint32_t	out_iovs;
> +};
> +
> +struct fuse_poll_in {
> +	uint64_t	fh;
> +	uint64_t	kh;
> +	uint32_t	flags;
> +	uint32_t	events;
> +};
> +
> +struct fuse_poll_out {
> +	uint32_t	revents;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_poll_wakeup_out {
> +	uint64_t	kh;
> +};
> +
> +struct fuse_fallocate_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint64_t	length;
> +	uint32_t	mode;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_in_header {
> +	uint32_t	len;
> +	uint32_t	opcode;
> +	uint64_t	unique;
> +	uint64_t	nodeid;
> +	uint32_t	uid;
> +	uint32_t	gid;
> +	uint32_t	pid;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_out_header {
> +	uint32_t	len;
> +	int32_t		error;
> +	uint64_t	unique;
> +};
> +
> +struct fuse_dirent {
> +	uint64_t	ino;
> +	uint64_t	off;
> +	uint32_t	namelen;
> +	uint32_t	type;
> +	char name[];
> +};
> +
> +#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
> +#define FUSE_DIRENT_ALIGN(x) \
> +	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
> +#define FUSE_DIRENT_SIZE(d) \
> +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
> +
> +struct fuse_direntplus {
> +	struct fuse_entry_out entry_out;
> +	struct fuse_dirent dirent;
> +};
> +
> +#define FUSE_NAME_OFFSET_DIRENTPLUS \
> +	offsetof(struct fuse_direntplus, dirent.name)
> +#define FUSE_DIRENTPLUS_SIZE(d) \
> +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
> +
> +struct fuse_notify_inval_inode_out {
> +	uint64_t	ino;
> +	int64_t		off;
> +	int64_t		len;
> +};
> +
> +struct fuse_notify_inval_entry_out {
> +	uint64_t	parent;
> +	uint32_t	namelen;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_delete_out {
> +	uint64_t	parent;
> +	uint64_t	child;
> +	uint32_t	namelen;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_store_out {
> +	uint64_t	nodeid;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_notify_retrieve_out {
> +	uint64_t	notify_unique;
> +	uint64_t	nodeid;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	padding;
> +};
> +
> +/* Matches the size of fuse_write_in */
> +struct fuse_notify_retrieve_in {
> +	uint64_t	dummy1;
> +	uint64_t	offset;
> +	uint32_t	size;
> +	uint32_t	dummy2;
> +	uint64_t	dummy3;
> +	uint64_t	dummy4;
> +};
> +
> +/* Device ioctls: */
> +#define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
> +
> +struct fuse_lseek_in {
> +	uint64_t	fh;
> +	uint64_t	offset;
> +	uint32_t	whence;
> +	uint32_t	padding;
> +};
> +
> +struct fuse_lseek_out {
> +	uint64_t	offset;
> +};
> +
> +struct fuse_copy_file_range_in {
> +	uint64_t	fh_in;
> +	uint64_t	off_in;
> +	uint64_t	nodeid_out;
> +	uint64_t	fh_out;
> +	uint64_t	off_out;
> +	uint64_t	len;
> +	uint64_t	flags;
> +};
> +
> +#endif /* _LINUX_FUSE_H */
> -- 
> 2.23.0
Dr. David Alan Gilbert Oct. 24, 2019, 2:28 p.m. UTC | #3
* Michael S. Tsirkin (mst@redhat.com) wrote:
> On Mon, Oct 21, 2019 at 11:58:04AM +0100, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > Pull in fuse.h from the kernel; version 97f9a3c4eee55b0178b518ae7114a6a53372913d
> > 
> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > ---
> >  contrib/virtiofsd/fuse_kernel.h | 858 ++++++++++++++++++++++++++++++++
> >  1 file changed, 858 insertions(+)
> >  create mode 100644 contrib/virtiofsd/fuse_kernel.h
> > 
> > diff --git a/contrib/virtiofsd/fuse_kernel.h b/contrib/virtiofsd/fuse_kernel.h
> > new file mode 100644
> > index 0000000000..802b0377a4
> > --- /dev/null
> > +++ b/contrib/virtiofsd/fuse_kernel.h
> > @@ -0,0 +1,858 @@
> > +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
> > +/*
> > +    This file defines the kernel interface of FUSE
> > +    Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
> > +
> > +    This program can be distributed under the terms of the GNU GPL.
> > +    See the file COPYING.
> 
> So I guess we need COPYING then?

We already have a COPYING file which has a copy of the GPLv2 in.
(The kernel's copying file has SPDX for gpl 2 and the note about the
linux syscall exception).  Curiously the libfuse repo also has this
comment block, but doesn't have a COPYING file (It has a GPL2.txt and an
LGPL2.txt).

Dave

> > +    This -- and only this -- header file may also be distributed under
> > +    the terms of the BSD Licence as follows:
> > +
> > +    Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
> > +
> > +    Redistribution and use in source and binary forms, with or without
> > +    modification, are permitted provided that the following conditions
> > +    are met:
> > +    1. Redistributions of source code must retain the above copyright
> > +       notice, this list of conditions and the following disclaimer.
> > +    2. Redistributions in binary form must reproduce the above copyright
> > +       notice, this list of conditions and the following disclaimer in the
> > +       documentation and/or other materials provided with the distribution.
> > +
> > +    THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
> > +    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> > +    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> > +    ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
> > +    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> > +    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> > +    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> > +    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> > +    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> > +    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> > +    SUCH DAMAGE.
> > +*/
> > +
> > +/*
> > + * This file defines the kernel interface of FUSE
> > + *
> > + * Protocol changelog:
> > + *
> > + * 7.9:
> > + *  - new fuse_getattr_in input argument of GETATTR
> > + *  - add lk_flags in fuse_lk_in
> > + *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
> > + *  - add blksize field to fuse_attr
> > + *  - add file flags field to fuse_read_in and fuse_write_in
> > + *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
> > + *
> > + * 7.10
> > + *  - add nonseekable open flag
> > + *
> > + * 7.11
> > + *  - add IOCTL message
> > + *  - add unsolicited notification support
> > + *  - add POLL message and NOTIFY_POLL notification
> > + *
> > + * 7.12
> > + *  - add umask flag to input argument of create, mknod and mkdir
> > + *  - add notification messages for invalidation of inodes and
> > + *    directory entries
> > + *
> > + * 7.13
> > + *  - make max number of background requests and congestion threshold
> > + *    tunables
> > + *
> > + * 7.14
> > + *  - add splice support to fuse device
> > + *
> > + * 7.15
> > + *  - add store notify
> > + *  - add retrieve notify
> > + *
> > + * 7.16
> > + *  - add BATCH_FORGET request
> > + *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
> > + *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
> > + *  - add FUSE_IOCTL_32BIT flag
> > + *
> > + * 7.17
> > + *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
> > + *
> > + * 7.18
> > + *  - add FUSE_IOCTL_DIR flag
> > + *  - add FUSE_NOTIFY_DELETE
> > + *
> > + * 7.19
> > + *  - add FUSE_FALLOCATE
> > + *
> > + * 7.20
> > + *  - add FUSE_AUTO_INVAL_DATA
> > + *
> > + * 7.21
> > + *  - add FUSE_READDIRPLUS
> > + *  - send the requested events in POLL request
> > + *
> > + * 7.22
> > + *  - add FUSE_ASYNC_DIO
> > + *
> > + * 7.23
> > + *  - add FUSE_WRITEBACK_CACHE
> > + *  - add time_gran to fuse_init_out
> > + *  - add reserved space to fuse_init_out
> > + *  - add FATTR_CTIME
> > + *  - add ctime and ctimensec to fuse_setattr_in
> > + *  - add FUSE_RENAME2 request
> > + *  - add FUSE_NO_OPEN_SUPPORT flag
> > + *
> > + *  7.24
> > + *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
> > + *
> > + *  7.25
> > + *  - add FUSE_PARALLEL_DIROPS
> > + *
> > + *  7.26
> > + *  - add FUSE_HANDLE_KILLPRIV
> > + *  - add FUSE_POSIX_ACL
> > + *
> > + *  7.27
> > + *  - add FUSE_ABORT_ERROR
> > + *
> > + *  7.28
> > + *  - add FUSE_COPY_FILE_RANGE
> > + *  - add FOPEN_CACHE_DIR
> > + *  - add FUSE_MAX_PAGES, add max_pages to init_out
> > + *  - add FUSE_CACHE_SYMLINKS
> > + *
> > + *  7.29
> > + *  - add FUSE_NO_OPENDIR_SUPPORT flag
> > + *
> > + *  7.30
> > + *  - add FUSE_EXPLICIT_INVAL_DATA
> > + *  - add FUSE_IOCTL_COMPAT_X32
> > + *
> > + *  7.31
> > + *  - add FUSE_WRITE_KILL_PRIV flag
> > + *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
> > + *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
> > + */
> > +
> > +#ifndef _LINUX_FUSE_H
> > +#define _LINUX_FUSE_H
> > +
> > +#ifdef __KERNEL__
> > +#include <linux/types.h>
> > +#else
> > +#include <stdint.h>
> > +#endif
> > +
> > +/*
> > + * Version negotiation:
> > + *
> > + * Both the kernel and userspace send the version they support in the
> > + * INIT request and reply respectively.
> > + *
> > + * If the major versions match then both shall use the smallest
> > + * of the two minor versions for communication.
> > + *
> > + * If the kernel supports a larger major version, then userspace shall
> > + * reply with the major version it supports, ignore the rest of the
> > + * INIT message and expect a new INIT message from the kernel with a
> > + * matching major version.
> > + *
> > + * If the library supports a larger major version, then it shall fall
> > + * back to the major protocol version sent by the kernel for
> > + * communication and reply with that major version (and an arbitrary
> > + * supported minor version).
> > + */
> > +
> > +/** Version number of this interface */
> > +#define FUSE_KERNEL_VERSION 7
> > +
> > +/** Minor version number of this interface */
> > +#define FUSE_KERNEL_MINOR_VERSION 31
> > +
> > +/** The node ID of the root inode */
> > +#define FUSE_ROOT_ID 1
> > +
> > +/* Make sure all structures are padded to 64bit boundary, so 32bit
> > +   userspace works under 64bit kernels */
> > +
> > +struct fuse_attr {
> > +	uint64_t	ino;
> > +	uint64_t	size;
> > +	uint64_t	blocks;
> > +	uint64_t	atime;
> > +	uint64_t	mtime;
> > +	uint64_t	ctime;
> > +	uint32_t	atimensec;
> > +	uint32_t	mtimensec;
> > +	uint32_t	ctimensec;
> > +	uint32_t	mode;
> > +	uint32_t	nlink;
> > +	uint32_t	uid;
> > +	uint32_t	gid;
> > +	uint32_t	rdev;
> > +	uint32_t	blksize;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_kstatfs {
> > +	uint64_t	blocks;
> > +	uint64_t	bfree;
> > +	uint64_t	bavail;
> > +	uint64_t	files;
> > +	uint64_t	ffree;
> > +	uint32_t	bsize;
> > +	uint32_t	namelen;
> > +	uint32_t	frsize;
> > +	uint32_t	padding;
> > +	uint32_t	spare[6];
> > +};
> > +
> > +struct fuse_file_lock {
> > +	uint64_t	start;
> > +	uint64_t	end;
> > +	uint32_t	type;
> > +	uint32_t	pid; /* tgid */
> > +};
> > +
> > +/**
> > + * Bitmasks for fuse_setattr_in.valid
> > + */
> > +#define FATTR_MODE	(1 << 0)
> > +#define FATTR_UID	(1 << 1)
> > +#define FATTR_GID	(1 << 2)
> > +#define FATTR_SIZE	(1 << 3)
> > +#define FATTR_ATIME	(1 << 4)
> > +#define FATTR_MTIME	(1 << 5)
> > +#define FATTR_FH	(1 << 6)
> > +#define FATTR_ATIME_NOW	(1 << 7)
> > +#define FATTR_MTIME_NOW	(1 << 8)
> > +#define FATTR_LOCKOWNER	(1 << 9)
> > +#define FATTR_CTIME	(1 << 10)
> > +
> > +/**
> > + * Flags returned by the OPEN request
> > + *
> > + * FOPEN_DIRECT_IO: bypass page cache for this open file
> > + * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
> > + * FOPEN_NONSEEKABLE: the file is not seekable
> > + * FOPEN_CACHE_DIR: allow caching this directory
> > + * FOPEN_STREAM: the file is stream-like (no file position at all)
> > + */
> > +#define FOPEN_DIRECT_IO		(1 << 0)
> > +#define FOPEN_KEEP_CACHE	(1 << 1)
> > +#define FOPEN_NONSEEKABLE	(1 << 2)
> > +#define FOPEN_CACHE_DIR		(1 << 3)
> > +#define FOPEN_STREAM		(1 << 4)
> > +
> > +/**
> > + * INIT request/reply flags
> > + *
> > + * FUSE_ASYNC_READ: asynchronous read requests
> > + * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
> > + * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
> > + * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
> > + * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
> > + * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
> > + * FUSE_DONT_MASK: don't apply umask to file mode on create operations
> > + * FUSE_SPLICE_WRITE: kernel supports splice write on the device
> > + * FUSE_SPLICE_MOVE: kernel supports splice move on the device
> > + * FUSE_SPLICE_READ: kernel supports splice read on the device
> > + * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
> > + * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
> > + * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
> > + * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
> > + * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
> > + * FUSE_ASYNC_DIO: asynchronous direct I/O submission
> > + * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
> > + * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
> > + * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
> > + * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
> > + * FUSE_POSIX_ACL: filesystem supports posix acls
> > + * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
> > + * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
> > + * FUSE_CACHE_SYMLINKS: cache READLINK responses
> > + * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
> > + * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
> > + * FUSE_MAP_ALIGNMENT: map_alignment field is valid
> > + */
> > +#define FUSE_ASYNC_READ		(1 << 0)
> > +#define FUSE_POSIX_LOCKS	(1 << 1)
> > +#define FUSE_FILE_OPS		(1 << 2)
> > +#define FUSE_ATOMIC_O_TRUNC	(1 << 3)
> > +#define FUSE_EXPORT_SUPPORT	(1 << 4)
> > +#define FUSE_BIG_WRITES		(1 << 5)
> > +#define FUSE_DONT_MASK		(1 << 6)
> > +#define FUSE_SPLICE_WRITE	(1 << 7)
> > +#define FUSE_SPLICE_MOVE	(1 << 8)
> > +#define FUSE_SPLICE_READ	(1 << 9)
> > +#define FUSE_FLOCK_LOCKS	(1 << 10)
> > +#define FUSE_HAS_IOCTL_DIR	(1 << 11)
> > +#define FUSE_AUTO_INVAL_DATA	(1 << 12)
> > +#define FUSE_DO_READDIRPLUS	(1 << 13)
> > +#define FUSE_READDIRPLUS_AUTO	(1 << 14)
> > +#define FUSE_ASYNC_DIO		(1 << 15)
> > +#define FUSE_WRITEBACK_CACHE	(1 << 16)
> > +#define FUSE_NO_OPEN_SUPPORT	(1 << 17)
> > +#define FUSE_PARALLEL_DIROPS    (1 << 18)
> > +#define FUSE_HANDLE_KILLPRIV	(1 << 19)
> > +#define FUSE_POSIX_ACL		(1 << 20)
> > +#define FUSE_ABORT_ERROR	(1 << 21)
> > +#define FUSE_MAX_PAGES		(1 << 22)
> > +#define FUSE_CACHE_SYMLINKS	(1 << 23)
> > +#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
> > +#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
> > +#define FUSE_MAP_ALIGNMENT	(1 << 26)
> > +
> > +/**
> > + * CUSE INIT request/reply flags
> > + *
> > + * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
> > + */
> > +#define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
> > +
> > +/**
> > + * Release flags
> > + */
> > +#define FUSE_RELEASE_FLUSH	(1 << 0)
> > +#define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
> > +
> > +/**
> > + * Getattr flags
> > + */
> > +#define FUSE_GETATTR_FH		(1 << 0)
> > +
> > +/**
> > + * Lock flags
> > + */
> > +#define FUSE_LK_FLOCK		(1 << 0)
> > +
> > +/**
> > + * WRITE flags
> > + *
> > + * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
> > + * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
> > + * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
> > + */
> > +#define FUSE_WRITE_CACHE	(1 << 0)
> > +#define FUSE_WRITE_LOCKOWNER	(1 << 1)
> > +#define FUSE_WRITE_KILL_PRIV	(1 << 2)
> > +
> > +/**
> > + * Read flags
> > + */
> > +#define FUSE_READ_LOCKOWNER	(1 << 1)
> > +
> > +/**
> > + * Ioctl flags
> > + *
> > + * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
> > + * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
> > + * FUSE_IOCTL_RETRY: retry with new iovecs
> > + * FUSE_IOCTL_32BIT: 32bit ioctl
> > + * FUSE_IOCTL_DIR: is a directory
> > + * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
> > + *
> > + * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
> > + */
> > +#define FUSE_IOCTL_COMPAT	(1 << 0)
> > +#define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
> > +#define FUSE_IOCTL_RETRY	(1 << 2)
> > +#define FUSE_IOCTL_32BIT	(1 << 3)
> > +#define FUSE_IOCTL_DIR		(1 << 4)
> > +#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
> > +
> > +#define FUSE_IOCTL_MAX_IOV	256
> > +
> > +/**
> > + * Poll flags
> > + *
> > + * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
> > + */
> > +#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
> > +
> > +/**
> > + * Fsync flags
> > + *
> > + * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
> > + */
> > +#define FUSE_FSYNC_FDATASYNC	(1 << 0)
> > +
> > +enum fuse_opcode {
> > +	FUSE_LOOKUP		= 1,
> > +	FUSE_FORGET		= 2,  /* no reply */
> > +	FUSE_GETATTR		= 3,
> > +	FUSE_SETATTR		= 4,
> > +	FUSE_READLINK		= 5,
> > +	FUSE_SYMLINK		= 6,
> > +	FUSE_MKNOD		= 8,
> > +	FUSE_MKDIR		= 9,
> > +	FUSE_UNLINK		= 10,
> > +	FUSE_RMDIR		= 11,
> > +	FUSE_RENAME		= 12,
> > +	FUSE_LINK		= 13,
> > +	FUSE_OPEN		= 14,
> > +	FUSE_READ		= 15,
> > +	FUSE_WRITE		= 16,
> > +	FUSE_STATFS		= 17,
> > +	FUSE_RELEASE		= 18,
> > +	FUSE_FSYNC		= 20,
> > +	FUSE_SETXATTR		= 21,
> > +	FUSE_GETXATTR		= 22,
> > +	FUSE_LISTXATTR		= 23,
> > +	FUSE_REMOVEXATTR	= 24,
> > +	FUSE_FLUSH		= 25,
> > +	FUSE_INIT		= 26,
> > +	FUSE_OPENDIR		= 27,
> > +	FUSE_READDIR		= 28,
> > +	FUSE_RELEASEDIR		= 29,
> > +	FUSE_FSYNCDIR		= 30,
> > +	FUSE_GETLK		= 31,
> > +	FUSE_SETLK		= 32,
> > +	FUSE_SETLKW		= 33,
> > +	FUSE_ACCESS		= 34,
> > +	FUSE_CREATE		= 35,
> > +	FUSE_INTERRUPT		= 36,
> > +	FUSE_BMAP		= 37,
> > +	FUSE_DESTROY		= 38,
> > +	FUSE_IOCTL		= 39,
> > +	FUSE_POLL		= 40,
> > +	FUSE_NOTIFY_REPLY	= 41,
> > +	FUSE_BATCH_FORGET	= 42,
> > +	FUSE_FALLOCATE		= 43,
> > +	FUSE_READDIRPLUS	= 44,
> > +	FUSE_RENAME2		= 45,
> > +	FUSE_LSEEK		= 46,
> > +	FUSE_COPY_FILE_RANGE	= 47,
> > +	FUSE_SETUPMAPPING	= 48,
> > +	FUSE_REMOVEMAPPING	= 49,
> > +
> > +	/* CUSE specific operations */
> > +	CUSE_INIT		= 4096,
> > +
> > +	/* Reserved opcodes: helpful to detect structure endian-ness */
> > +	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
> > +	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
> > +};
> > +
> > +enum fuse_notify_code {
> > +	FUSE_NOTIFY_POLL   = 1,
> > +	FUSE_NOTIFY_INVAL_INODE = 2,
> > +	FUSE_NOTIFY_INVAL_ENTRY = 3,
> > +	FUSE_NOTIFY_STORE = 4,
> > +	FUSE_NOTIFY_RETRIEVE = 5,
> > +	FUSE_NOTIFY_DELETE = 6,
> > +	FUSE_NOTIFY_CODE_MAX,
> > +};
> > +
> > +/* The read buffer is required to be at least 8k, but may be much larger */
> > +#define FUSE_MIN_READ_BUFFER 8192
> > +
> > +#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
> > +
> > +struct fuse_entry_out {
> > +	uint64_t	nodeid;		/* Inode ID */
> > +	uint64_t	generation;	/* Inode generation: nodeid:gen must
> > +					   be unique for the fs's lifetime */
> > +	uint64_t	entry_valid;	/* Cache timeout for the name */
> > +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> > +	uint32_t	entry_valid_nsec;
> > +	uint32_t	attr_valid_nsec;
> > +	struct fuse_attr attr;
> > +};
> > +
> > +struct fuse_forget_in {
> > +	uint64_t	nlookup;
> > +};
> > +
> > +struct fuse_forget_one {
> > +	uint64_t	nodeid;
> > +	uint64_t	nlookup;
> > +};
> > +
> > +struct fuse_batch_forget_in {
> > +	uint32_t	count;
> > +	uint32_t	dummy;
> > +};
> > +
> > +struct fuse_getattr_in {
> > +	uint32_t	getattr_flags;
> > +	uint32_t	dummy;
> > +	uint64_t	fh;
> > +};
> > +
> > +#define FUSE_COMPAT_ATTR_OUT_SIZE 96
> > +
> > +struct fuse_attr_out {
> > +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> > +	uint32_t	attr_valid_nsec;
> > +	uint32_t	dummy;
> > +	struct fuse_attr attr;
> > +};
> > +
> > +#define FUSE_COMPAT_MKNOD_IN_SIZE 8
> > +
> > +struct fuse_mknod_in {
> > +	uint32_t	mode;
> > +	uint32_t	rdev;
> > +	uint32_t	umask;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_mkdir_in {
> > +	uint32_t	mode;
> > +	uint32_t	umask;
> > +};
> > +
> > +struct fuse_rename_in {
> > +	uint64_t	newdir;
> > +};
> > +
> > +struct fuse_rename2_in {
> > +	uint64_t	newdir;
> > +	uint32_t	flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_link_in {
> > +	uint64_t	oldnodeid;
> > +};
> > +
> > +struct fuse_setattr_in {
> > +	uint32_t	valid;
> > +	uint32_t	padding;
> > +	uint64_t	fh;
> > +	uint64_t	size;
> > +	uint64_t	lock_owner;
> > +	uint64_t	atime;
> > +	uint64_t	mtime;
> > +	uint64_t	ctime;
> > +	uint32_t	atimensec;
> > +	uint32_t	mtimensec;
> > +	uint32_t	ctimensec;
> > +	uint32_t	mode;
> > +	uint32_t	unused4;
> > +	uint32_t	uid;
> > +	uint32_t	gid;
> > +	uint32_t	unused5;
> > +};
> > +
> > +struct fuse_open_in {
> > +	uint32_t	flags;
> > +	uint32_t	unused;
> > +};
> > +
> > +struct fuse_create_in {
> > +	uint32_t	flags;
> > +	uint32_t	mode;
> > +	uint32_t	umask;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_open_out {
> > +	uint64_t	fh;
> > +	uint32_t	open_flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_release_in {
> > +	uint64_t	fh;
> > +	uint32_t	flags;
> > +	uint32_t	release_flags;
> > +	uint64_t	lock_owner;
> > +};
> > +
> > +struct fuse_flush_in {
> > +	uint64_t	fh;
> > +	uint32_t	unused;
> > +	uint32_t	padding;
> > +	uint64_t	lock_owner;
> > +};
> > +
> > +struct fuse_read_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	read_flags;
> > +	uint64_t	lock_owner;
> > +	uint32_t	flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +#define FUSE_COMPAT_WRITE_IN_SIZE 24
> > +
> > +struct fuse_write_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	write_flags;
> > +	uint64_t	lock_owner;
> > +	uint32_t	flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_write_out {
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +#define FUSE_COMPAT_STATFS_SIZE 48
> > +
> > +struct fuse_statfs_out {
> > +	struct fuse_kstatfs st;
> > +};
> > +
> > +struct fuse_fsync_in {
> > +	uint64_t	fh;
> > +	uint32_t	fsync_flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_setxattr_in {
> > +	uint32_t	size;
> > +	uint32_t	flags;
> > +};
> > +
> > +struct fuse_getxattr_in {
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_getxattr_out {
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_lk_in {
> > +	uint64_t	fh;
> > +	uint64_t	owner;
> > +	struct fuse_file_lock lk;
> > +	uint32_t	lk_flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_lk_out {
> > +	struct fuse_file_lock lk;
> > +};
> > +
> > +struct fuse_access_in {
> > +	uint32_t	mask;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_init_in {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	max_readahead;
> > +	uint32_t	flags;
> > +};
> > +
> > +#define FUSE_COMPAT_INIT_OUT_SIZE 8
> > +#define FUSE_COMPAT_22_INIT_OUT_SIZE 24
> > +
> > +struct fuse_init_out {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	max_readahead;
> > +	uint32_t	flags;
> > +	uint16_t	max_background;
> > +	uint16_t	congestion_threshold;
> > +	uint32_t	max_write;
> > +	uint32_t	time_gran;
> > +	uint16_t	max_pages;
> > +	uint16_t	map_alignment;
> > +	uint32_t	unused[8];
> > +};
> > +
> > +#define CUSE_INIT_INFO_MAX 4096
> > +
> > +struct cuse_init_in {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	unused;
> > +	uint32_t	flags;
> > +};
> > +
> > +struct cuse_init_out {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	unused;
> > +	uint32_t	flags;
> > +	uint32_t	max_read;
> > +	uint32_t	max_write;
> > +	uint32_t	dev_major;		/* chardev major */
> > +	uint32_t	dev_minor;		/* chardev minor */
> > +	uint32_t	spare[10];
> > +};
> > +
> > +struct fuse_interrupt_in {
> > +	uint64_t	unique;
> > +};
> > +
> > +struct fuse_bmap_in {
> > +	uint64_t	block;
> > +	uint32_t	blocksize;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_bmap_out {
> > +	uint64_t	block;
> > +};
> > +
> > +struct fuse_ioctl_in {
> > +	uint64_t	fh;
> > +	uint32_t	flags;
> > +	uint32_t	cmd;
> > +	uint64_t	arg;
> > +	uint32_t	in_size;
> > +	uint32_t	out_size;
> > +};
> > +
> > +struct fuse_ioctl_iovec {
> > +	uint64_t	base;
> > +	uint64_t	len;
> > +};
> > +
> > +struct fuse_ioctl_out {
> > +	int32_t		result;
> > +	uint32_t	flags;
> > +	uint32_t	in_iovs;
> > +	uint32_t	out_iovs;
> > +};
> > +
> > +struct fuse_poll_in {
> > +	uint64_t	fh;
> > +	uint64_t	kh;
> > +	uint32_t	flags;
> > +	uint32_t	events;
> > +};
> > +
> > +struct fuse_poll_out {
> > +	uint32_t	revents;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_poll_wakeup_out {
> > +	uint64_t	kh;
> > +};
> > +
> > +struct fuse_fallocate_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint64_t	length;
> > +	uint32_t	mode;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_in_header {
> > +	uint32_t	len;
> > +	uint32_t	opcode;
> > +	uint64_t	unique;
> > +	uint64_t	nodeid;
> > +	uint32_t	uid;
> > +	uint32_t	gid;
> > +	uint32_t	pid;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_out_header {
> > +	uint32_t	len;
> > +	int32_t		error;
> > +	uint64_t	unique;
> > +};
> > +
> > +struct fuse_dirent {
> > +	uint64_t	ino;
> > +	uint64_t	off;
> > +	uint32_t	namelen;
> > +	uint32_t	type;
> > +	char name[];
> > +};
> > +
> > +#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
> > +#define FUSE_DIRENT_ALIGN(x) \
> > +	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
> > +#define FUSE_DIRENT_SIZE(d) \
> > +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
> > +
> > +struct fuse_direntplus {
> > +	struct fuse_entry_out entry_out;
> > +	struct fuse_dirent dirent;
> > +};
> > +
> > +#define FUSE_NAME_OFFSET_DIRENTPLUS \
> > +	offsetof(struct fuse_direntplus, dirent.name)
> > +#define FUSE_DIRENTPLUS_SIZE(d) \
> > +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
> > +
> > +struct fuse_notify_inval_inode_out {
> > +	uint64_t	ino;
> > +	int64_t		off;
> > +	int64_t		len;
> > +};
> > +
> > +struct fuse_notify_inval_entry_out {
> > +	uint64_t	parent;
> > +	uint32_t	namelen;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_delete_out {
> > +	uint64_t	parent;
> > +	uint64_t	child;
> > +	uint32_t	namelen;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_store_out {
> > +	uint64_t	nodeid;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_retrieve_out {
> > +	uint64_t	notify_unique;
> > +	uint64_t	nodeid;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +/* Matches the size of fuse_write_in */
> > +struct fuse_notify_retrieve_in {
> > +	uint64_t	dummy1;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	dummy2;
> > +	uint64_t	dummy3;
> > +	uint64_t	dummy4;
> > +};
> > +
> > +/* Device ioctls: */
> > +#define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
> > +
> > +struct fuse_lseek_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint32_t	whence;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_lseek_out {
> > +	uint64_t	offset;
> > +};
> > +
> > +struct fuse_copy_file_range_in {
> > +	uint64_t	fh_in;
> > +	uint64_t	off_in;
> > +	uint64_t	nodeid_out;
> > +	uint64_t	fh_out;
> > +	uint64_t	off_out;
> > +	uint64_t	len;
> > +	uint64_t	flags;
> > +};
> > +
> > +#endif /* _LINUX_FUSE_H */
> > -- 
> > 2.23.0
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
Dr. David Alan Gilbert Oct. 24, 2019, 3:49 p.m. UTC | #4
* Michael S. Tsirkin (mst@redhat.com) wrote:
> On Mon, Oct 21, 2019 at 11:58:04AM +0100, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > Pull in fuse.h from the kernel; version 97f9a3c4eee55b0178b518ae7114a6a53372913d
> 
> How about using some tag instead?

Updated to v5.4-rc4

> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > ---
> >  contrib/virtiofsd/fuse_kernel.h | 858 ++++++++++++++++++++++++++++++++
> >  1 file changed, 858 insertions(+)
> >  create mode 100644 contrib/virtiofsd/fuse_kernel.h
> > 
> > diff --git a/contrib/virtiofsd/fuse_kernel.h b/contrib/virtiofsd/fuse_kernel.h
> > new file mode 100644
> > index 0000000000..802b0377a4
> > --- /dev/null
> > +++ b/contrib/virtiofsd/fuse_kernel.h
> > @@ -0,0 +1,858 @@
> > +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
> > +/*
> > +    This file defines the kernel interface of FUSE
> > +    Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
> > +
> > +    This program can be distributed under the terms of the GNU GPL.
> > +    See the file COPYING.
> > +
> > +    This -- and only this -- header file may also be distributed under
> > +    the terms of the BSD Licence as follows:
> > +
> > +    Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
> > +
> > +    Redistribution and use in source and binary forms, with or without
> > +    modification, are permitted provided that the following conditions
> > +    are met:
> > +    1. Redistributions of source code must retain the above copyright
> > +       notice, this list of conditions and the following disclaimer.
> > +    2. Redistributions in binary form must reproduce the above copyright
> > +       notice, this list of conditions and the following disclaimer in the
> > +       documentation and/or other materials provided with the distribution.
> > +
> > +    THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
> > +    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> > +    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> > +    ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
> > +    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> > +    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> > +    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> > +    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> > +    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> > +    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> > +    SUCH DAMAGE.
> > +*/
> > +
> > +/*
> > + * This file defines the kernel interface of FUSE
> > + *
> > + * Protocol changelog:
> > + *
> > + * 7.9:
> > + *  - new fuse_getattr_in input argument of GETATTR
> > + *  - add lk_flags in fuse_lk_in
> > + *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
> > + *  - add blksize field to fuse_attr
> > + *  - add file flags field to fuse_read_in and fuse_write_in
> > + *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
> > + *
> > + * 7.10
> > + *  - add nonseekable open flag
> > + *
> > + * 7.11
> > + *  - add IOCTL message
> > + *  - add unsolicited notification support
> > + *  - add POLL message and NOTIFY_POLL notification
> > + *
> > + * 7.12
> > + *  - add umask flag to input argument of create, mknod and mkdir
> > + *  - add notification messages for invalidation of inodes and
> > + *    directory entries
> > + *
> > + * 7.13
> > + *  - make max number of background requests and congestion threshold
> > + *    tunables
> > + *
> > + * 7.14
> > + *  - add splice support to fuse device
> > + *
> > + * 7.15
> > + *  - add store notify
> > + *  - add retrieve notify
> > + *
> > + * 7.16
> > + *  - add BATCH_FORGET request
> > + *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
> > + *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
> > + *  - add FUSE_IOCTL_32BIT flag
> > + *
> > + * 7.17
> > + *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
> > + *
> > + * 7.18
> > + *  - add FUSE_IOCTL_DIR flag
> > + *  - add FUSE_NOTIFY_DELETE
> > + *
> > + * 7.19
> > + *  - add FUSE_FALLOCATE
> > + *
> > + * 7.20
> > + *  - add FUSE_AUTO_INVAL_DATA
> > + *
> > + * 7.21
> > + *  - add FUSE_READDIRPLUS
> > + *  - send the requested events in POLL request
> > + *
> > + * 7.22
> > + *  - add FUSE_ASYNC_DIO
> > + *
> > + * 7.23
> > + *  - add FUSE_WRITEBACK_CACHE
> > + *  - add time_gran to fuse_init_out
> > + *  - add reserved space to fuse_init_out
> > + *  - add FATTR_CTIME
> > + *  - add ctime and ctimensec to fuse_setattr_in
> > + *  - add FUSE_RENAME2 request
> > + *  - add FUSE_NO_OPEN_SUPPORT flag
> > + *
> > + *  7.24
> > + *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
> > + *
> > + *  7.25
> > + *  - add FUSE_PARALLEL_DIROPS
> > + *
> > + *  7.26
> > + *  - add FUSE_HANDLE_KILLPRIV
> > + *  - add FUSE_POSIX_ACL
> > + *
> > + *  7.27
> > + *  - add FUSE_ABORT_ERROR
> > + *
> > + *  7.28
> > + *  - add FUSE_COPY_FILE_RANGE
> > + *  - add FOPEN_CACHE_DIR
> > + *  - add FUSE_MAX_PAGES, add max_pages to init_out
> > + *  - add FUSE_CACHE_SYMLINKS
> > + *
> > + *  7.29
> > + *  - add FUSE_NO_OPENDIR_SUPPORT flag
> > + *
> > + *  7.30
> > + *  - add FUSE_EXPLICIT_INVAL_DATA
> > + *  - add FUSE_IOCTL_COMPAT_X32
> > + *
> > + *  7.31
> > + *  - add FUSE_WRITE_KILL_PRIV flag
> > + *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
> > + *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
> > + */
> > +
> > +#ifndef _LINUX_FUSE_H
> > +#define _LINUX_FUSE_H
> > +
> > +#ifdef __KERNEL__
> > +#include <linux/types.h>
> > +#else
> > +#include <stdint.h>
> > +#endif
> > +
> > +/*
> > + * Version negotiation:
> > + *
> > + * Both the kernel and userspace send the version they support in the
> > + * INIT request and reply respectively.
> > + *
> > + * If the major versions match then both shall use the smallest
> > + * of the two minor versions for communication.
> > + *
> > + * If the kernel supports a larger major version, then userspace shall
> > + * reply with the major version it supports, ignore the rest of the
> > + * INIT message and expect a new INIT message from the kernel with a
> > + * matching major version.
> > + *
> > + * If the library supports a larger major version, then it shall fall
> > + * back to the major protocol version sent by the kernel for
> > + * communication and reply with that major version (and an arbitrary
> > + * supported minor version).
> > + */
> > +
> > +/** Version number of this interface */
> > +#define FUSE_KERNEL_VERSION 7
> > +
> > +/** Minor version number of this interface */
> > +#define FUSE_KERNEL_MINOR_VERSION 31
> > +
> > +/** The node ID of the root inode */
> > +#define FUSE_ROOT_ID 1
> > +
> > +/* Make sure all structures are padded to 64bit boundary, so 32bit
> > +   userspace works under 64bit kernels */
> > +
> > +struct fuse_attr {
> > +	uint64_t	ino;
> > +	uint64_t	size;
> > +	uint64_t	blocks;
> > +	uint64_t	atime;
> > +	uint64_t	mtime;
> > +	uint64_t	ctime;
> > +	uint32_t	atimensec;
> > +	uint32_t	mtimensec;
> > +	uint32_t	ctimensec;
> > +	uint32_t	mode;
> > +	uint32_t	nlink;
> > +	uint32_t	uid;
> > +	uint32_t	gid;
> > +	uint32_t	rdev;
> > +	uint32_t	blksize;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_kstatfs {
> > +	uint64_t	blocks;
> > +	uint64_t	bfree;
> > +	uint64_t	bavail;
> > +	uint64_t	files;
> > +	uint64_t	ffree;
> > +	uint32_t	bsize;
> > +	uint32_t	namelen;
> > +	uint32_t	frsize;
> > +	uint32_t	padding;
> > +	uint32_t	spare[6];
> > +};
> > +
> > +struct fuse_file_lock {
> > +	uint64_t	start;
> > +	uint64_t	end;
> > +	uint32_t	type;
> > +	uint32_t	pid; /* tgid */
> > +};
> > +
> > +/**
> > + * Bitmasks for fuse_setattr_in.valid
> > + */
> > +#define FATTR_MODE	(1 << 0)
> > +#define FATTR_UID	(1 << 1)
> > +#define FATTR_GID	(1 << 2)
> > +#define FATTR_SIZE	(1 << 3)
> > +#define FATTR_ATIME	(1 << 4)
> > +#define FATTR_MTIME	(1 << 5)
> > +#define FATTR_FH	(1 << 6)
> > +#define FATTR_ATIME_NOW	(1 << 7)
> > +#define FATTR_MTIME_NOW	(1 << 8)
> > +#define FATTR_LOCKOWNER	(1 << 9)
> > +#define FATTR_CTIME	(1 << 10)
> > +
> > +/**
> > + * Flags returned by the OPEN request
> > + *
> > + * FOPEN_DIRECT_IO: bypass page cache for this open file
> > + * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
> > + * FOPEN_NONSEEKABLE: the file is not seekable
> > + * FOPEN_CACHE_DIR: allow caching this directory
> > + * FOPEN_STREAM: the file is stream-like (no file position at all)
> > + */
> > +#define FOPEN_DIRECT_IO		(1 << 0)
> > +#define FOPEN_KEEP_CACHE	(1 << 1)
> > +#define FOPEN_NONSEEKABLE	(1 << 2)
> > +#define FOPEN_CACHE_DIR		(1 << 3)
> > +#define FOPEN_STREAM		(1 << 4)
> > +
> > +/**
> > + * INIT request/reply flags
> > + *
> > + * FUSE_ASYNC_READ: asynchronous read requests
> > + * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
> > + * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
> > + * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
> > + * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
> > + * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
> > + * FUSE_DONT_MASK: don't apply umask to file mode on create operations
> > + * FUSE_SPLICE_WRITE: kernel supports splice write on the device
> > + * FUSE_SPLICE_MOVE: kernel supports splice move on the device
> > + * FUSE_SPLICE_READ: kernel supports splice read on the device
> > + * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
> > + * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
> > + * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
> > + * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
> > + * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
> > + * FUSE_ASYNC_DIO: asynchronous direct I/O submission
> > + * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
> > + * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
> > + * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
> > + * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
> > + * FUSE_POSIX_ACL: filesystem supports posix acls
> > + * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
> > + * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
> > + * FUSE_CACHE_SYMLINKS: cache READLINK responses
> > + * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
> > + * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
> > + * FUSE_MAP_ALIGNMENT: map_alignment field is valid
> > + */
> > +#define FUSE_ASYNC_READ		(1 << 0)
> > +#define FUSE_POSIX_LOCKS	(1 << 1)
> > +#define FUSE_FILE_OPS		(1 << 2)
> > +#define FUSE_ATOMIC_O_TRUNC	(1 << 3)
> > +#define FUSE_EXPORT_SUPPORT	(1 << 4)
> > +#define FUSE_BIG_WRITES		(1 << 5)
> > +#define FUSE_DONT_MASK		(1 << 6)
> > +#define FUSE_SPLICE_WRITE	(1 << 7)
> > +#define FUSE_SPLICE_MOVE	(1 << 8)
> > +#define FUSE_SPLICE_READ	(1 << 9)
> > +#define FUSE_FLOCK_LOCKS	(1 << 10)
> > +#define FUSE_HAS_IOCTL_DIR	(1 << 11)
> > +#define FUSE_AUTO_INVAL_DATA	(1 << 12)
> > +#define FUSE_DO_READDIRPLUS	(1 << 13)
> > +#define FUSE_READDIRPLUS_AUTO	(1 << 14)
> > +#define FUSE_ASYNC_DIO		(1 << 15)
> > +#define FUSE_WRITEBACK_CACHE	(1 << 16)
> > +#define FUSE_NO_OPEN_SUPPORT	(1 << 17)
> > +#define FUSE_PARALLEL_DIROPS    (1 << 18)
> > +#define FUSE_HANDLE_KILLPRIV	(1 << 19)
> > +#define FUSE_POSIX_ACL		(1 << 20)
> > +#define FUSE_ABORT_ERROR	(1 << 21)
> > +#define FUSE_MAX_PAGES		(1 << 22)
> > +#define FUSE_CACHE_SYMLINKS	(1 << 23)
> > +#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
> > +#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
> > +#define FUSE_MAP_ALIGNMENT	(1 << 26)
> > +
> > +/**
> > + * CUSE INIT request/reply flags
> > + *
> > + * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
> > + */
> > +#define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
> > +
> > +/**
> > + * Release flags
> > + */
> > +#define FUSE_RELEASE_FLUSH	(1 << 0)
> > +#define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
> > +
> > +/**
> > + * Getattr flags
> > + */
> > +#define FUSE_GETATTR_FH		(1 << 0)
> > +
> > +/**
> > + * Lock flags
> > + */
> > +#define FUSE_LK_FLOCK		(1 << 0)
> > +
> > +/**
> > + * WRITE flags
> > + *
> > + * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
> > + * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
> > + * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
> > + */
> > +#define FUSE_WRITE_CACHE	(1 << 0)
> > +#define FUSE_WRITE_LOCKOWNER	(1 << 1)
> > +#define FUSE_WRITE_KILL_PRIV	(1 << 2)
> > +
> > +/**
> > + * Read flags
> > + */
> > +#define FUSE_READ_LOCKOWNER	(1 << 1)
> > +
> > +/**
> > + * Ioctl flags
> > + *
> > + * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
> > + * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
> > + * FUSE_IOCTL_RETRY: retry with new iovecs
> > + * FUSE_IOCTL_32BIT: 32bit ioctl
> > + * FUSE_IOCTL_DIR: is a directory
> > + * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
> > + *
> > + * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
> > + */
> > +#define FUSE_IOCTL_COMPAT	(1 << 0)
> > +#define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
> > +#define FUSE_IOCTL_RETRY	(1 << 2)
> > +#define FUSE_IOCTL_32BIT	(1 << 3)
> > +#define FUSE_IOCTL_DIR		(1 << 4)
> > +#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
> > +
> > +#define FUSE_IOCTL_MAX_IOV	256
> > +
> > +/**
> > + * Poll flags
> > + *
> > + * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
> > + */
> > +#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
> > +
> > +/**
> > + * Fsync flags
> > + *
> > + * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
> > + */
> > +#define FUSE_FSYNC_FDATASYNC	(1 << 0)
> > +
> > +enum fuse_opcode {
> > +	FUSE_LOOKUP		= 1,
> > +	FUSE_FORGET		= 2,  /* no reply */
> > +	FUSE_GETATTR		= 3,
> > +	FUSE_SETATTR		= 4,
> > +	FUSE_READLINK		= 5,
> > +	FUSE_SYMLINK		= 6,
> > +	FUSE_MKNOD		= 8,
> > +	FUSE_MKDIR		= 9,
> > +	FUSE_UNLINK		= 10,
> > +	FUSE_RMDIR		= 11,
> > +	FUSE_RENAME		= 12,
> > +	FUSE_LINK		= 13,
> > +	FUSE_OPEN		= 14,
> > +	FUSE_READ		= 15,
> > +	FUSE_WRITE		= 16,
> > +	FUSE_STATFS		= 17,
> > +	FUSE_RELEASE		= 18,
> > +	FUSE_FSYNC		= 20,
> > +	FUSE_SETXATTR		= 21,
> > +	FUSE_GETXATTR		= 22,
> > +	FUSE_LISTXATTR		= 23,
> > +	FUSE_REMOVEXATTR	= 24,
> > +	FUSE_FLUSH		= 25,
> > +	FUSE_INIT		= 26,
> > +	FUSE_OPENDIR		= 27,
> > +	FUSE_READDIR		= 28,
> > +	FUSE_RELEASEDIR		= 29,
> > +	FUSE_FSYNCDIR		= 30,
> > +	FUSE_GETLK		= 31,
> > +	FUSE_SETLK		= 32,
> > +	FUSE_SETLKW		= 33,
> > +	FUSE_ACCESS		= 34,
> > +	FUSE_CREATE		= 35,
> > +	FUSE_INTERRUPT		= 36,
> > +	FUSE_BMAP		= 37,
> > +	FUSE_DESTROY		= 38,
> > +	FUSE_IOCTL		= 39,
> > +	FUSE_POLL		= 40,
> > +	FUSE_NOTIFY_REPLY	= 41,
> > +	FUSE_BATCH_FORGET	= 42,
> > +	FUSE_FALLOCATE		= 43,
> > +	FUSE_READDIRPLUS	= 44,
> > +	FUSE_RENAME2		= 45,
> > +	FUSE_LSEEK		= 46,
> > +	FUSE_COPY_FILE_RANGE	= 47,
> > +	FUSE_SETUPMAPPING	= 48,
> > +	FUSE_REMOVEMAPPING	= 49,
> > +
> > +	/* CUSE specific operations */
> > +	CUSE_INIT		= 4096,
> > +
> > +	/* Reserved opcodes: helpful to detect structure endian-ness */
> > +	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
> > +	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
> > +};
> > +
> > +enum fuse_notify_code {
> > +	FUSE_NOTIFY_POLL   = 1,
> > +	FUSE_NOTIFY_INVAL_INODE = 2,
> > +	FUSE_NOTIFY_INVAL_ENTRY = 3,
> > +	FUSE_NOTIFY_STORE = 4,
> > +	FUSE_NOTIFY_RETRIEVE = 5,
> > +	FUSE_NOTIFY_DELETE = 6,
> > +	FUSE_NOTIFY_CODE_MAX,
> > +};
> > +
> > +/* The read buffer is required to be at least 8k, but may be much larger */
> > +#define FUSE_MIN_READ_BUFFER 8192
> > +
> > +#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
> > +
> > +struct fuse_entry_out {
> > +	uint64_t	nodeid;		/* Inode ID */
> > +	uint64_t	generation;	/* Inode generation: nodeid:gen must
> > +					   be unique for the fs's lifetime */
> > +	uint64_t	entry_valid;	/* Cache timeout for the name */
> > +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> > +	uint32_t	entry_valid_nsec;
> > +	uint32_t	attr_valid_nsec;
> > +	struct fuse_attr attr;
> > +};
> > +
> > +struct fuse_forget_in {
> > +	uint64_t	nlookup;
> > +};
> > +
> > +struct fuse_forget_one {
> > +	uint64_t	nodeid;
> > +	uint64_t	nlookup;
> > +};
> > +
> > +struct fuse_batch_forget_in {
> > +	uint32_t	count;
> > +	uint32_t	dummy;
> > +};
> > +
> > +struct fuse_getattr_in {
> > +	uint32_t	getattr_flags;
> > +	uint32_t	dummy;
> > +	uint64_t	fh;
> > +};
> > +
> > +#define FUSE_COMPAT_ATTR_OUT_SIZE 96
> > +
> > +struct fuse_attr_out {
> > +	uint64_t	attr_valid;	/* Cache timeout for the attributes */
> > +	uint32_t	attr_valid_nsec;
> > +	uint32_t	dummy;
> > +	struct fuse_attr attr;
> > +};
> > +
> > +#define FUSE_COMPAT_MKNOD_IN_SIZE 8
> > +
> > +struct fuse_mknod_in {
> > +	uint32_t	mode;
> > +	uint32_t	rdev;
> > +	uint32_t	umask;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_mkdir_in {
> > +	uint32_t	mode;
> > +	uint32_t	umask;
> > +};
> > +
> > +struct fuse_rename_in {
> > +	uint64_t	newdir;
> > +};
> > +
> > +struct fuse_rename2_in {
> > +	uint64_t	newdir;
> > +	uint32_t	flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_link_in {
> > +	uint64_t	oldnodeid;
> > +};
> > +
> > +struct fuse_setattr_in {
> > +	uint32_t	valid;
> > +	uint32_t	padding;
> > +	uint64_t	fh;
> > +	uint64_t	size;
> > +	uint64_t	lock_owner;
> > +	uint64_t	atime;
> > +	uint64_t	mtime;
> > +	uint64_t	ctime;
> > +	uint32_t	atimensec;
> > +	uint32_t	mtimensec;
> > +	uint32_t	ctimensec;
> > +	uint32_t	mode;
> > +	uint32_t	unused4;
> > +	uint32_t	uid;
> > +	uint32_t	gid;
> > +	uint32_t	unused5;
> > +};
> > +
> > +struct fuse_open_in {
> > +	uint32_t	flags;
> > +	uint32_t	unused;
> > +};
> > +
> > +struct fuse_create_in {
> > +	uint32_t	flags;
> > +	uint32_t	mode;
> > +	uint32_t	umask;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_open_out {
> > +	uint64_t	fh;
> > +	uint32_t	open_flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_release_in {
> > +	uint64_t	fh;
> > +	uint32_t	flags;
> > +	uint32_t	release_flags;
> > +	uint64_t	lock_owner;
> > +};
> > +
> > +struct fuse_flush_in {
> > +	uint64_t	fh;
> > +	uint32_t	unused;
> > +	uint32_t	padding;
> > +	uint64_t	lock_owner;
> > +};
> > +
> > +struct fuse_read_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	read_flags;
> > +	uint64_t	lock_owner;
> > +	uint32_t	flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +#define FUSE_COMPAT_WRITE_IN_SIZE 24
> > +
> > +struct fuse_write_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	write_flags;
> > +	uint64_t	lock_owner;
> > +	uint32_t	flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_write_out {
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +#define FUSE_COMPAT_STATFS_SIZE 48
> > +
> > +struct fuse_statfs_out {
> > +	struct fuse_kstatfs st;
> > +};
> > +
> > +struct fuse_fsync_in {
> > +	uint64_t	fh;
> > +	uint32_t	fsync_flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_setxattr_in {
> > +	uint32_t	size;
> > +	uint32_t	flags;
> > +};
> > +
> > +struct fuse_getxattr_in {
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_getxattr_out {
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_lk_in {
> > +	uint64_t	fh;
> > +	uint64_t	owner;
> > +	struct fuse_file_lock lk;
> > +	uint32_t	lk_flags;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_lk_out {
> > +	struct fuse_file_lock lk;
> > +};
> > +
> > +struct fuse_access_in {
> > +	uint32_t	mask;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_init_in {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	max_readahead;
> > +	uint32_t	flags;
> > +};
> > +
> > +#define FUSE_COMPAT_INIT_OUT_SIZE 8
> > +#define FUSE_COMPAT_22_INIT_OUT_SIZE 24
> > +
> > +struct fuse_init_out {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	max_readahead;
> > +	uint32_t	flags;
> > +	uint16_t	max_background;
> > +	uint16_t	congestion_threshold;
> > +	uint32_t	max_write;
> > +	uint32_t	time_gran;
> > +	uint16_t	max_pages;
> > +	uint16_t	map_alignment;
> > +	uint32_t	unused[8];
> > +};
> > +
> > +#define CUSE_INIT_INFO_MAX 4096
> > +
> > +struct cuse_init_in {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	unused;
> > +	uint32_t	flags;
> > +};
> > +
> > +struct cuse_init_out {
> > +	uint32_t	major;
> > +	uint32_t	minor;
> > +	uint32_t	unused;
> > +	uint32_t	flags;
> > +	uint32_t	max_read;
> > +	uint32_t	max_write;
> > +	uint32_t	dev_major;		/* chardev major */
> > +	uint32_t	dev_minor;		/* chardev minor */
> > +	uint32_t	spare[10];
> > +};
> > +
> > +struct fuse_interrupt_in {
> > +	uint64_t	unique;
> > +};
> > +
> > +struct fuse_bmap_in {
> > +	uint64_t	block;
> > +	uint32_t	blocksize;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_bmap_out {
> > +	uint64_t	block;
> > +};
> > +
> > +struct fuse_ioctl_in {
> > +	uint64_t	fh;
> > +	uint32_t	flags;
> > +	uint32_t	cmd;
> > +	uint64_t	arg;
> > +	uint32_t	in_size;
> > +	uint32_t	out_size;
> > +};
> > +
> > +struct fuse_ioctl_iovec {
> > +	uint64_t	base;
> > +	uint64_t	len;
> > +};
> > +
> > +struct fuse_ioctl_out {
> > +	int32_t		result;
> > +	uint32_t	flags;
> > +	uint32_t	in_iovs;
> > +	uint32_t	out_iovs;
> > +};
> > +
> > +struct fuse_poll_in {
> > +	uint64_t	fh;
> > +	uint64_t	kh;
> > +	uint32_t	flags;
> > +	uint32_t	events;
> > +};
> > +
> > +struct fuse_poll_out {
> > +	uint32_t	revents;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_poll_wakeup_out {
> > +	uint64_t	kh;
> > +};
> > +
> > +struct fuse_fallocate_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint64_t	length;
> > +	uint32_t	mode;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_in_header {
> > +	uint32_t	len;
> > +	uint32_t	opcode;
> > +	uint64_t	unique;
> > +	uint64_t	nodeid;
> > +	uint32_t	uid;
> > +	uint32_t	gid;
> > +	uint32_t	pid;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_out_header {
> > +	uint32_t	len;
> > +	int32_t		error;
> > +	uint64_t	unique;
> > +};
> > +
> > +struct fuse_dirent {
> > +	uint64_t	ino;
> > +	uint64_t	off;
> > +	uint32_t	namelen;
> > +	uint32_t	type;
> > +	char name[];
> > +};
> > +
> > +#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
> > +#define FUSE_DIRENT_ALIGN(x) \
> > +	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
> > +#define FUSE_DIRENT_SIZE(d) \
> > +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
> > +
> > +struct fuse_direntplus {
> > +	struct fuse_entry_out entry_out;
> > +	struct fuse_dirent dirent;
> > +};
> > +
> > +#define FUSE_NAME_OFFSET_DIRENTPLUS \
> > +	offsetof(struct fuse_direntplus, dirent.name)
> > +#define FUSE_DIRENTPLUS_SIZE(d) \
> > +	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
> > +
> > +struct fuse_notify_inval_inode_out {
> > +	uint64_t	ino;
> > +	int64_t		off;
> > +	int64_t		len;
> > +};
> > +
> > +struct fuse_notify_inval_entry_out {
> > +	uint64_t	parent;
> > +	uint32_t	namelen;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_delete_out {
> > +	uint64_t	parent;
> > +	uint64_t	child;
> > +	uint32_t	namelen;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_store_out {
> > +	uint64_t	nodeid;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_notify_retrieve_out {
> > +	uint64_t	notify_unique;
> > +	uint64_t	nodeid;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	padding;
> > +};
> > +
> > +/* Matches the size of fuse_write_in */
> > +struct fuse_notify_retrieve_in {
> > +	uint64_t	dummy1;
> > +	uint64_t	offset;
> > +	uint32_t	size;
> > +	uint32_t	dummy2;
> > +	uint64_t	dummy3;
> > +	uint64_t	dummy4;
> > +};
> > +
> > +/* Device ioctls: */
> > +#define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
> > +
> > +struct fuse_lseek_in {
> > +	uint64_t	fh;
> > +	uint64_t	offset;
> > +	uint32_t	whence;
> > +	uint32_t	padding;
> > +};
> > +
> > +struct fuse_lseek_out {
> > +	uint64_t	offset;
> > +};
> > +
> > +struct fuse_copy_file_range_in {
> > +	uint64_t	fh_in;
> > +	uint64_t	off_in;
> > +	uint64_t	nodeid_out;
> > +	uint64_t	fh_out;
> > +	uint64_t	off_out;
> > +	uint64_t	len;
> > +	uint64_t	flags;
> > +};
> > +
> > +#endif /* _LINUX_FUSE_H */
> > -- 
> > 2.23.0
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK

Patch
diff mbox series

diff --git a/contrib/virtiofsd/fuse_kernel.h b/contrib/virtiofsd/fuse_kernel.h
new file mode 100644
index 0000000000..802b0377a4
--- /dev/null
+++ b/contrib/virtiofsd/fuse_kernel.h
@@ -0,0 +1,858 @@ 
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
+/*
+    This file defines the kernel interface of FUSE
+    Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
+
+    This program can be distributed under the terms of the GNU GPL.
+    See the file COPYING.
+
+    This -- and only this -- header file may also be distributed under
+    the terms of the BSD Licence as follows:
+
+    Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+*/
+
+/*
+ * This file defines the kernel interface of FUSE
+ *
+ * Protocol changelog:
+ *
+ * 7.9:
+ *  - new fuse_getattr_in input argument of GETATTR
+ *  - add lk_flags in fuse_lk_in
+ *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
+ *  - add blksize field to fuse_attr
+ *  - add file flags field to fuse_read_in and fuse_write_in
+ *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
+ *
+ * 7.10
+ *  - add nonseekable open flag
+ *
+ * 7.11
+ *  - add IOCTL message
+ *  - add unsolicited notification support
+ *  - add POLL message and NOTIFY_POLL notification
+ *
+ * 7.12
+ *  - add umask flag to input argument of create, mknod and mkdir
+ *  - add notification messages for invalidation of inodes and
+ *    directory entries
+ *
+ * 7.13
+ *  - make max number of background requests and congestion threshold
+ *    tunables
+ *
+ * 7.14
+ *  - add splice support to fuse device
+ *
+ * 7.15
+ *  - add store notify
+ *  - add retrieve notify
+ *
+ * 7.16
+ *  - add BATCH_FORGET request
+ *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
+ *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
+ *  - add FUSE_IOCTL_32BIT flag
+ *
+ * 7.17
+ *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
+ *
+ * 7.18
+ *  - add FUSE_IOCTL_DIR flag
+ *  - add FUSE_NOTIFY_DELETE
+ *
+ * 7.19
+ *  - add FUSE_FALLOCATE
+ *
+ * 7.20
+ *  - add FUSE_AUTO_INVAL_DATA
+ *
+ * 7.21
+ *  - add FUSE_READDIRPLUS
+ *  - send the requested events in POLL request
+ *
+ * 7.22
+ *  - add FUSE_ASYNC_DIO
+ *
+ * 7.23
+ *  - add FUSE_WRITEBACK_CACHE
+ *  - add time_gran to fuse_init_out
+ *  - add reserved space to fuse_init_out
+ *  - add FATTR_CTIME
+ *  - add ctime and ctimensec to fuse_setattr_in
+ *  - add FUSE_RENAME2 request
+ *  - add FUSE_NO_OPEN_SUPPORT flag
+ *
+ *  7.24
+ *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
+ *
+ *  7.25
+ *  - add FUSE_PARALLEL_DIROPS
+ *
+ *  7.26
+ *  - add FUSE_HANDLE_KILLPRIV
+ *  - add FUSE_POSIX_ACL
+ *
+ *  7.27
+ *  - add FUSE_ABORT_ERROR
+ *
+ *  7.28
+ *  - add FUSE_COPY_FILE_RANGE
+ *  - add FOPEN_CACHE_DIR
+ *  - add FUSE_MAX_PAGES, add max_pages to init_out
+ *  - add FUSE_CACHE_SYMLINKS
+ *
+ *  7.29
+ *  - add FUSE_NO_OPENDIR_SUPPORT flag
+ *
+ *  7.30
+ *  - add FUSE_EXPLICIT_INVAL_DATA
+ *  - add FUSE_IOCTL_COMPAT_X32
+ *
+ *  7.31
+ *  - add FUSE_WRITE_KILL_PRIV flag
+ *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
+ *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
+ */
+
+#ifndef _LINUX_FUSE_H
+#define _LINUX_FUSE_H
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#else
+#include <stdint.h>
+#endif
+
+/*
+ * Version negotiation:
+ *
+ * Both the kernel and userspace send the version they support in the
+ * INIT request and reply respectively.
+ *
+ * If the major versions match then both shall use the smallest
+ * of the two minor versions for communication.
+ *
+ * If the kernel supports a larger major version, then userspace shall
+ * reply with the major version it supports, ignore the rest of the
+ * INIT message and expect a new INIT message from the kernel with a
+ * matching major version.
+ *
+ * If the library supports a larger major version, then it shall fall
+ * back to the major protocol version sent by the kernel for
+ * communication and reply with that major version (and an arbitrary
+ * supported minor version).
+ */
+
+/** Version number of this interface */
+#define FUSE_KERNEL_VERSION 7
+
+/** Minor version number of this interface */
+#define FUSE_KERNEL_MINOR_VERSION 31
+
+/** The node ID of the root inode */
+#define FUSE_ROOT_ID 1
+
+/* Make sure all structures are padded to 64bit boundary, so 32bit
+   userspace works under 64bit kernels */
+
+struct fuse_attr {
+	uint64_t	ino;
+	uint64_t	size;
+	uint64_t	blocks;
+	uint64_t	atime;
+	uint64_t	mtime;
+	uint64_t	ctime;
+	uint32_t	atimensec;
+	uint32_t	mtimensec;
+	uint32_t	ctimensec;
+	uint32_t	mode;
+	uint32_t	nlink;
+	uint32_t	uid;
+	uint32_t	gid;
+	uint32_t	rdev;
+	uint32_t	blksize;
+	uint32_t	padding;
+};
+
+struct fuse_kstatfs {
+	uint64_t	blocks;
+	uint64_t	bfree;
+	uint64_t	bavail;
+	uint64_t	files;
+	uint64_t	ffree;
+	uint32_t	bsize;
+	uint32_t	namelen;
+	uint32_t	frsize;
+	uint32_t	padding;
+	uint32_t	spare[6];
+};
+
+struct fuse_file_lock {
+	uint64_t	start;
+	uint64_t	end;
+	uint32_t	type;
+	uint32_t	pid; /* tgid */
+};
+
+/**
+ * Bitmasks for fuse_setattr_in.valid
+ */
+#define FATTR_MODE	(1 << 0)
+#define FATTR_UID	(1 << 1)
+#define FATTR_GID	(1 << 2)
+#define FATTR_SIZE	(1 << 3)
+#define FATTR_ATIME	(1 << 4)
+#define FATTR_MTIME	(1 << 5)
+#define FATTR_FH	(1 << 6)
+#define FATTR_ATIME_NOW	(1 << 7)
+#define FATTR_MTIME_NOW	(1 << 8)
+#define FATTR_LOCKOWNER	(1 << 9)
+#define FATTR_CTIME	(1 << 10)
+
+/**
+ * Flags returned by the OPEN request
+ *
+ * FOPEN_DIRECT_IO: bypass page cache for this open file
+ * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
+ * FOPEN_NONSEEKABLE: the file is not seekable
+ * FOPEN_CACHE_DIR: allow caching this directory
+ * FOPEN_STREAM: the file is stream-like (no file position at all)
+ */
+#define FOPEN_DIRECT_IO		(1 << 0)
+#define FOPEN_KEEP_CACHE	(1 << 1)
+#define FOPEN_NONSEEKABLE	(1 << 2)
+#define FOPEN_CACHE_DIR		(1 << 3)
+#define FOPEN_STREAM		(1 << 4)
+
+/**
+ * INIT request/reply flags
+ *
+ * FUSE_ASYNC_READ: asynchronous read requests
+ * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
+ * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
+ * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
+ * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
+ * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
+ * FUSE_DONT_MASK: don't apply umask to file mode on create operations
+ * FUSE_SPLICE_WRITE: kernel supports splice write on the device
+ * FUSE_SPLICE_MOVE: kernel supports splice move on the device
+ * FUSE_SPLICE_READ: kernel supports splice read on the device
+ * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
+ * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
+ * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
+ * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
+ * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
+ * FUSE_ASYNC_DIO: asynchronous direct I/O submission
+ * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
+ * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
+ * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
+ * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
+ * FUSE_POSIX_ACL: filesystem supports posix acls
+ * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
+ * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
+ * FUSE_CACHE_SYMLINKS: cache READLINK responses
+ * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
+ * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
+ * FUSE_MAP_ALIGNMENT: map_alignment field is valid
+ */
+#define FUSE_ASYNC_READ		(1 << 0)
+#define FUSE_POSIX_LOCKS	(1 << 1)
+#define FUSE_FILE_OPS		(1 << 2)
+#define FUSE_ATOMIC_O_TRUNC	(1 << 3)
+#define FUSE_EXPORT_SUPPORT	(1 << 4)
+#define FUSE_BIG_WRITES		(1 << 5)
+#define FUSE_DONT_MASK		(1 << 6)
+#define FUSE_SPLICE_WRITE	(1 << 7)
+#define FUSE_SPLICE_MOVE	(1 << 8)
+#define FUSE_SPLICE_READ	(1 << 9)
+#define FUSE_FLOCK_LOCKS	(1 << 10)
+#define FUSE_HAS_IOCTL_DIR	(1 << 11)
+#define FUSE_AUTO_INVAL_DATA	(1 << 12)
+#define FUSE_DO_READDIRPLUS	(1 << 13)
+#define FUSE_READDIRPLUS_AUTO	(1 << 14)
+#define FUSE_ASYNC_DIO		(1 << 15)
+#define FUSE_WRITEBACK_CACHE	(1 << 16)
+#define FUSE_NO_OPEN_SUPPORT	(1 << 17)
+#define FUSE_PARALLEL_DIROPS    (1 << 18)
+#define FUSE_HANDLE_KILLPRIV	(1 << 19)
+#define FUSE_POSIX_ACL		(1 << 20)
+#define FUSE_ABORT_ERROR	(1 << 21)
+#define FUSE_MAX_PAGES		(1 << 22)
+#define FUSE_CACHE_SYMLINKS	(1 << 23)
+#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
+#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
+#define FUSE_MAP_ALIGNMENT	(1 << 26)
+
+/**
+ * CUSE INIT request/reply flags
+ *
+ * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
+ */
+#define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
+
+/**
+ * Release flags
+ */
+#define FUSE_RELEASE_FLUSH	(1 << 0)
+#define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
+
+/**
+ * Getattr flags
+ */
+#define FUSE_GETATTR_FH		(1 << 0)
+
+/**
+ * Lock flags
+ */
+#define FUSE_LK_FLOCK		(1 << 0)
+
+/**
+ * WRITE flags
+ *
+ * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
+ * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
+ * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
+ */
+#define FUSE_WRITE_CACHE	(1 << 0)
+#define FUSE_WRITE_LOCKOWNER	(1 << 1)
+#define FUSE_WRITE_KILL_PRIV	(1 << 2)
+
+/**
+ * Read flags
+ */
+#define FUSE_READ_LOCKOWNER	(1 << 1)
+
+/**
+ * Ioctl flags
+ *
+ * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
+ * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
+ * FUSE_IOCTL_RETRY: retry with new iovecs
+ * FUSE_IOCTL_32BIT: 32bit ioctl
+ * FUSE_IOCTL_DIR: is a directory
+ * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
+ *
+ * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
+ */
+#define FUSE_IOCTL_COMPAT	(1 << 0)
+#define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
+#define FUSE_IOCTL_RETRY	(1 << 2)
+#define FUSE_IOCTL_32BIT	(1 << 3)
+#define FUSE_IOCTL_DIR		(1 << 4)
+#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
+
+#define FUSE_IOCTL_MAX_IOV	256
+
+/**
+ * Poll flags
+ *
+ * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
+ */
+#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
+
+/**
+ * Fsync flags
+ *
+ * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
+ */
+#define FUSE_FSYNC_FDATASYNC	(1 << 0)
+
+enum fuse_opcode {
+	FUSE_LOOKUP		= 1,
+	FUSE_FORGET		= 2,  /* no reply */
+	FUSE_GETATTR		= 3,
+	FUSE_SETATTR		= 4,
+	FUSE_READLINK		= 5,
+	FUSE_SYMLINK		= 6,
+	FUSE_MKNOD		= 8,
+	FUSE_MKDIR		= 9,
+	FUSE_UNLINK		= 10,
+	FUSE_RMDIR		= 11,
+	FUSE_RENAME		= 12,
+	FUSE_LINK		= 13,
+	FUSE_OPEN		= 14,
+	FUSE_READ		= 15,
+	FUSE_WRITE		= 16,
+	FUSE_STATFS		= 17,
+	FUSE_RELEASE		= 18,
+	FUSE_FSYNC		= 20,
+	FUSE_SETXATTR		= 21,
+	FUSE_GETXATTR		= 22,
+	FUSE_LISTXATTR		= 23,
+	FUSE_REMOVEXATTR	= 24,
+	FUSE_FLUSH		= 25,
+	FUSE_INIT		= 26,
+	FUSE_OPENDIR		= 27,
+	FUSE_READDIR		= 28,
+	FUSE_RELEASEDIR		= 29,
+	FUSE_FSYNCDIR		= 30,
+	FUSE_GETLK		= 31,
+	FUSE_SETLK		= 32,
+	FUSE_SETLKW		= 33,
+	FUSE_ACCESS		= 34,
+	FUSE_CREATE		= 35,
+	FUSE_INTERRUPT		= 36,
+	FUSE_BMAP		= 37,
+	FUSE_DESTROY		= 38,
+	FUSE_IOCTL		= 39,
+	FUSE_POLL		= 40,
+	FUSE_NOTIFY_REPLY	= 41,
+	FUSE_BATCH_FORGET	= 42,
+	FUSE_FALLOCATE		= 43,
+	FUSE_READDIRPLUS	= 44,
+	FUSE_RENAME2		= 45,
+	FUSE_LSEEK		= 46,
+	FUSE_COPY_FILE_RANGE	= 47,
+	FUSE_SETUPMAPPING	= 48,
+	FUSE_REMOVEMAPPING	= 49,
+
+	/* CUSE specific operations */
+	CUSE_INIT		= 4096,
+
+	/* Reserved opcodes: helpful to detect structure endian-ness */
+	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
+	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
+};
+
+enum fuse_notify_code {
+	FUSE_NOTIFY_POLL   = 1,
+	FUSE_NOTIFY_INVAL_INODE = 2,
+	FUSE_NOTIFY_INVAL_ENTRY = 3,
+	FUSE_NOTIFY_STORE = 4,
+	FUSE_NOTIFY_RETRIEVE = 5,
+	FUSE_NOTIFY_DELETE = 6,
+	FUSE_NOTIFY_CODE_MAX,
+};
+
+/* The read buffer is required to be at least 8k, but may be much larger */
+#define FUSE_MIN_READ_BUFFER 8192
+
+#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
+
+struct fuse_entry_out {
+	uint64_t	nodeid;		/* Inode ID */
+	uint64_t	generation;	/* Inode generation: nodeid:gen must
+					   be unique for the fs's lifetime */
+	uint64_t	entry_valid;	/* Cache timeout for the name */
+	uint64_t	attr_valid;	/* Cache timeout for the attributes */
+	uint32_t	entry_valid_nsec;
+	uint32_t	attr_valid_nsec;
+	struct fuse_attr attr;
+};
+
+struct fuse_forget_in {
+	uint64_t	nlookup;
+};
+
+struct fuse_forget_one {
+	uint64_t	nodeid;
+	uint64_t	nlookup;
+};
+
+struct fuse_batch_forget_in {
+	uint32_t	count;
+	uint32_t	dummy;
+};
+
+struct fuse_getattr_in {
+	uint32_t	getattr_flags;
+	uint32_t	dummy;
+	uint64_t	fh;
+};
+
+#define FUSE_COMPAT_ATTR_OUT_SIZE 96
+
+struct fuse_attr_out {
+	uint64_t	attr_valid;	/* Cache timeout for the attributes */
+	uint32_t	attr_valid_nsec;
+	uint32_t	dummy;
+	struct fuse_attr attr;
+};
+
+#define FUSE_COMPAT_MKNOD_IN_SIZE 8
+
+struct fuse_mknod_in {
+	uint32_t	mode;
+	uint32_t	rdev;
+	uint32_t	umask;
+	uint32_t	padding;
+};
+
+struct fuse_mkdir_in {
+	uint32_t	mode;
+	uint32_t	umask;
+};
+
+struct fuse_rename_in {
+	uint64_t	newdir;
+};
+
+struct fuse_rename2_in {
+	uint64_t	newdir;
+	uint32_t	flags;
+	uint32_t	padding;
+};
+
+struct fuse_link_in {
+	uint64_t	oldnodeid;
+};
+
+struct fuse_setattr_in {
+	uint32_t	valid;
+	uint32_t	padding;
+	uint64_t	fh;
+	uint64_t	size;
+	uint64_t	lock_owner;
+	uint64_t	atime;
+	uint64_t	mtime;
+	uint64_t	ctime;
+	uint32_t	atimensec;
+	uint32_t	mtimensec;
+	uint32_t	ctimensec;
+	uint32_t	mode;
+	uint32_t	unused4;
+	uint32_t	uid;
+	uint32_t	gid;
+	uint32_t	unused5;
+};
+
+struct fuse_open_in {
+	uint32_t	flags;
+	uint32_t	unused;
+};
+
+struct fuse_create_in {
+	uint32_t	flags;
+	uint32_t	mode;
+	uint32_t	umask;
+	uint32_t	padding;
+};
+
+struct fuse_open_out {
+	uint64_t	fh;
+	uint32_t	open_flags;
+	uint32_t	padding;
+};
+
+struct fuse_release_in {
+	uint64_t	fh;
+	uint32_t	flags;
+	uint32_t	release_flags;
+	uint64_t	lock_owner;
+};
+
+struct fuse_flush_in {
+	uint64_t	fh;
+	uint32_t	unused;
+	uint32_t	padding;
+	uint64_t	lock_owner;
+};
+
+struct fuse_read_in {
+	uint64_t	fh;
+	uint64_t	offset;
+	uint32_t	size;
+	uint32_t	read_flags;
+	uint64_t	lock_owner;
+	uint32_t	flags;
+	uint32_t	padding;
+};
+
+#define FUSE_COMPAT_WRITE_IN_SIZE 24
+
+struct fuse_write_in {
+	uint64_t	fh;
+	uint64_t	offset;
+	uint32_t	size;
+	uint32_t	write_flags;
+	uint64_t	lock_owner;
+	uint32_t	flags;
+	uint32_t	padding;
+};
+
+struct fuse_write_out {
+	uint32_t	size;
+	uint32_t	padding;
+};
+
+#define FUSE_COMPAT_STATFS_SIZE 48
+
+struct fuse_statfs_out {
+	struct fuse_kstatfs st;
+};
+
+struct fuse_fsync_in {
+	uint64_t	fh;
+	uint32_t	fsync_flags;
+	uint32_t	padding;
+};
+
+struct fuse_setxattr_in {
+	uint32_t	size;
+	uint32_t	flags;
+};
+
+struct fuse_getxattr_in {
+	uint32_t	size;
+	uint32_t	padding;
+};
+
+struct fuse_getxattr_out {
+	uint32_t	size;
+	uint32_t	padding;
+};
+
+struct fuse_lk_in {
+	uint64_t	fh;
+	uint64_t	owner;
+	struct fuse_file_lock lk;
+	uint32_t	lk_flags;
+	uint32_t	padding;
+};
+
+struct fuse_lk_out {
+	struct fuse_file_lock lk;
+};
+
+struct fuse_access_in {
+	uint32_t	mask;
+	uint32_t	padding;
+};
+
+struct fuse_init_in {
+	uint32_t	major;
+	uint32_t	minor;
+	uint32_t	max_readahead;
+	uint32_t	flags;
+};
+
+#define FUSE_COMPAT_INIT_OUT_SIZE 8
+#define FUSE_COMPAT_22_INIT_OUT_SIZE 24
+
+struct fuse_init_out {
+	uint32_t	major;
+	uint32_t	minor;
+	uint32_t	max_readahead;
+	uint32_t	flags;
+	uint16_t	max_background;
+	uint16_t	congestion_threshold;
+	uint32_t	max_write;
+	uint32_t	time_gran;
+	uint16_t	max_pages;
+	uint16_t	map_alignment;
+	uint32_t	unused[8];
+};
+
+#define CUSE_INIT_INFO_MAX 4096
+
+struct cuse_init_in {
+	uint32_t	major;
+	uint32_t	minor;
+	uint32_t	unused;
+	uint32_t	flags;
+};
+
+struct cuse_init_out {
+	uint32_t	major;
+	uint32_t	minor;
+	uint32_t	unused;
+	uint32_t	flags;
+	uint32_t	max_read;
+	uint32_t	max_write;
+	uint32_t	dev_major;		/* chardev major */
+	uint32_t	dev_minor;		/* chardev minor */
+	uint32_t	spare[10];
+};
+
+struct fuse_interrupt_in {
+	uint64_t	unique;
+};
+
+struct fuse_bmap_in {
+	uint64_t	block;
+	uint32_t	blocksize;
+	uint32_t	padding;
+};
+
+struct fuse_bmap_out {
+	uint64_t	block;
+};
+
+struct fuse_ioctl_in {
+	uint64_t	fh;
+	uint32_t	flags;
+	uint32_t	cmd;
+	uint64_t	arg;
+	uint32_t	in_size;
+	uint32_t	out_size;
+};
+
+struct fuse_ioctl_iovec {
+	uint64_t	base;
+	uint64_t	len;
+};
+
+struct fuse_ioctl_out {
+	int32_t		result;
+	uint32_t	flags;
+	uint32_t	in_iovs;
+	uint32_t	out_iovs;
+};
+
+struct fuse_poll_in {
+	uint64_t	fh;
+	uint64_t	kh;
+	uint32_t	flags;
+	uint32_t	events;
+};
+
+struct fuse_poll_out {
+	uint32_t	revents;
+	uint32_t	padding;
+};
+
+struct fuse_notify_poll_wakeup_out {
+	uint64_t	kh;
+};
+
+struct fuse_fallocate_in {
+	uint64_t	fh;
+	uint64_t	offset;
+	uint64_t	length;
+	uint32_t	mode;
+	uint32_t	padding;
+};
+
+struct fuse_in_header {
+	uint32_t	len;
+	uint32_t	opcode;
+	uint64_t	unique;
+	uint64_t	nodeid;
+	uint32_t	uid;
+	uint32_t	gid;
+	uint32_t	pid;
+	uint32_t	padding;
+};
+
+struct fuse_out_header {
+	uint32_t	len;
+	int32_t		error;
+	uint64_t	unique;
+};
+
+struct fuse_dirent {
+	uint64_t	ino;
+	uint64_t	off;
+	uint32_t	namelen;
+	uint32_t	type;
+	char name[];
+};
+
+#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
+#define FUSE_DIRENT_ALIGN(x) \
+	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
+#define FUSE_DIRENT_SIZE(d) \
+	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
+
+struct fuse_direntplus {
+	struct fuse_entry_out entry_out;
+	struct fuse_dirent dirent;
+};
+
+#define FUSE_NAME_OFFSET_DIRENTPLUS \
+	offsetof(struct fuse_direntplus, dirent.name)
+#define FUSE_DIRENTPLUS_SIZE(d) \
+	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
+
+struct fuse_notify_inval_inode_out {
+	uint64_t	ino;
+	int64_t		off;
+	int64_t		len;
+};
+
+struct fuse_notify_inval_entry_out {
+	uint64_t	parent;
+	uint32_t	namelen;
+	uint32_t	padding;
+};
+
+struct fuse_notify_delete_out {
+	uint64_t	parent;
+	uint64_t	child;
+	uint32_t	namelen;
+	uint32_t	padding;
+};
+
+struct fuse_notify_store_out {
+	uint64_t	nodeid;
+	uint64_t	offset;
+	uint32_t	size;
+	uint32_t	padding;
+};
+
+struct fuse_notify_retrieve_out {
+	uint64_t	notify_unique;
+	uint64_t	nodeid;
+	uint64_t	offset;
+	uint32_t	size;
+	uint32_t	padding;
+};
+
+/* Matches the size of fuse_write_in */
+struct fuse_notify_retrieve_in {
+	uint64_t	dummy1;
+	uint64_t	offset;
+	uint32_t	size;
+	uint32_t	dummy2;
+	uint64_t	dummy3;
+	uint64_t	dummy4;
+};
+
+/* Device ioctls: */
+#define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
+
+struct fuse_lseek_in {
+	uint64_t	fh;
+	uint64_t	offset;
+	uint32_t	whence;
+	uint32_t	padding;
+};
+
+struct fuse_lseek_out {
+	uint64_t	offset;
+};
+
+struct fuse_copy_file_range_in {
+	uint64_t	fh_in;
+	uint64_t	off_in;
+	uint64_t	nodeid_out;
+	uint64_t	fh_out;
+	uint64_t	off_out;
+	uint64_t	len;
+	uint64_t	flags;
+};
+
+#endif /* _LINUX_FUSE_H */