1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
2 /*
3     This file defines the kernel interface of FUSE
4     Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
5 
6     This program can be distributed under the terms of the GNU GPL.
7     See the file COPYING.
8 
9     This -- and only this -- header file may also be distributed under
10     the terms of the BSD Licence as follows:
11 
12     Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
13 
14     Redistribution and use in source and binary forms, with or without
15     modification, are permitted provided that the following conditions
16     are met:
17     1. Redistributions of source code must retain the above copyright
18        notice, this list of conditions and the following disclaimer.
19     2. Redistributions in binary form must reproduce the above copyright
20        notice, this list of conditions and the following disclaimer in the
21        documentation and/or other materials provided with the distribution.
22 
23     THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26     ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
27     FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33     SUCH DAMAGE.
34 */
35 
36 /*
37  * This file defines the kernel interface of FUSE
38  *
39  * Protocol changelog:
40  *
41  * 7.1:
42  *  - add the following messages:
43  *      FUSE_SETATTR, FUSE_SYMLINK, FUSE_MKNOD, FUSE_MKDIR, FUSE_UNLINK,
44  *      FUSE_RMDIR, FUSE_RENAME, FUSE_LINK, FUSE_OPEN, FUSE_READ, FUSE_WRITE,
45  *      FUSE_RELEASE, FUSE_FSYNC, FUSE_FLUSH, FUSE_SETXATTR, FUSE_GETXATTR,
46  *      FUSE_LISTXATTR, FUSE_REMOVEXATTR, FUSE_OPENDIR, FUSE_READDIR,
47  *      FUSE_RELEASEDIR
48  *  - add padding to messages to accommodate 32-bit servers on 64-bit kernels
49  *
50  * 7.2:
51  *  - add FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE flags
52  *  - add FUSE_FSYNCDIR message
53  *
54  * 7.3:
55  *  - add FUSE_ACCESS message
56  *  - add FUSE_CREATE message
57  *  - add filehandle to fuse_setattr_in
58  *
59  * 7.4:
60  *  - add frsize to fuse_kstatfs
61  *  - clean up request size limit checking
62  *
63  * 7.5:
64  *  - add flags and max_write to fuse_init_out
65  *
66  * 7.6:
67  *  - add max_readahead to fuse_init_in and fuse_init_out
68  *
69  * 7.7:
70  *  - add FUSE_INTERRUPT message
71  *  - add POSIX file lock support
72  *
73  * 7.8:
74  *  - add lock_owner and flags fields to fuse_release_in
75  *  - add FUSE_BMAP message
76  *  - add FUSE_DESTROY message
77  *
78  * 7.9:
79  *  - new fuse_getattr_in input argument of GETATTR
80  *  - add lk_flags in fuse_lk_in
81  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
82  *  - add blksize field to fuse_attr
83  *  - add file flags field to fuse_read_in and fuse_write_in
84  *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
85  *
86  * 7.10
87  *  - add nonseekable open flag
88  *
89  * 7.11
90  *  - add IOCTL message
91  *  - add unsolicited notification support
92  *  - add POLL message and NOTIFY_POLL notification
93  *
94  * 7.12
95  *  - add umask flag to input argument of create, mknod and mkdir
96  *  - add notification messages for invalidation of inodes and
97  *    directory entries
98  *
99  * 7.13
100  *  - make max number of background requests and congestion threshold
101  *    tunables
102  *
103  * 7.14
104  *  - add splice support to fuse device
105  *
106  * 7.15
107  *  - add store notify
108  *  - add retrieve notify
109  *
110  * 7.16
111  *  - add BATCH_FORGET request
112  *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
113  *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
114  *  - add FUSE_IOCTL_32BIT flag
115  *
116  * 7.17
117  *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
118  *
119  * 7.18
120  *  - add FUSE_IOCTL_DIR flag
121  *  - add FUSE_NOTIFY_DELETE
122  *
123  * 7.19
124  *  - add FUSE_FALLOCATE
125  *
126  * 7.20
127  *  - add FUSE_AUTO_INVAL_DATA
128  *
129  * 7.21
130  *  - add FUSE_READDIRPLUS
131  *  - send the requested events in POLL request
132  *
133  * 7.22
134  *  - add FUSE_ASYNC_DIO
135  *
136  * 7.23
137  *  - add FUSE_WRITEBACK_CACHE
138  *  - add time_gran to fuse_init_out
139  *  - add reserved space to fuse_init_out
140  *  - add FATTR_CTIME
141  *  - add ctime and ctimensec to fuse_setattr_in
142  *  - add FUSE_RENAME2 request
143  *  - add FUSE_NO_OPEN_SUPPORT flag
144  *
145  *  7.24
146  *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
147  *
148  *  7.25
149  *  - add FUSE_PARALLEL_DIROPS
150  *
151  *  7.26
152  *  - add FUSE_HANDLE_KILLPRIV
153  *  - add FUSE_POSIX_ACL
154  *
155  *  7.27
156  *  - add FUSE_ABORT_ERROR
157  *
158  *  7.28
159  *  - add FUSE_COPY_FILE_RANGE
160  *  - add FOPEN_CACHE_DIR
161  *  - add FUSE_MAX_PAGES, add max_pages to init_out
162  *  - add FUSE_CACHE_SYMLINKS
163  *
164  *  7.29
165  *  - add FUSE_NO_OPENDIR_SUPPORT flag
166  *
167  *  7.30
168  *  - add FUSE_EXPLICIT_INVAL_DATA
169  *  - add FUSE_IOCTL_COMPAT_X32
170  *
171  *  7.31
172  *  - add FUSE_WRITE_KILL_PRIV flag
173  *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
174  *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
175  */
176 
177 #ifndef _LINUX_FUSE_H
178 #define _LINUX_FUSE_H
179 
180 #include <stdint.h>
181 
182 /*
183  * Version negotiation:
184  *
185  * Both the kernel and userspace send the version they support in the
186  * INIT request and reply respectively.
187  *
188  * If the major versions match then both shall use the smallest
189  * of the two minor versions for communication.
190  *
191  * If the kernel supports a larger major version, then userspace shall
192  * reply with the major version it supports, ignore the rest of the
193  * INIT message and expect a new INIT message from the kernel with a
194  * matching major version.
195  *
196  * If the library supports a larger major version, then it shall fall
197  * back to the major protocol version sent by the kernel for
198  * communication and reply with that major version (and an arbitrary
199  * supported minor version).
200  */
201 
202 /** Version number of this interface */
203 #define FUSE_KERNEL_VERSION 7
204 
205 /** Minor version number of this interface */
206 #define FUSE_KERNEL_MINOR_VERSION 31
207 
208 /** The node ID of the root inode */
209 #define FUSE_ROOT_ID 1
210 
211 /* Make sure all structures are padded to 64bit boundary, so 32bit
212    userspace works under 64bit kernels */
213 
214 struct fuse_attr {
215 	uint64_t	ino;
216 	uint64_t	size;
217 	uint64_t	blocks;
218 	uint64_t	atime;
219 	uint64_t	mtime;
220 	uint64_t	ctime;
221 	uint32_t	atimensec;
222 	uint32_t	mtimensec;
223 	uint32_t	ctimensec;
224 	uint32_t	mode;
225 	uint32_t	nlink;
226 	uint32_t	uid;
227 	uint32_t	gid;
228 	uint32_t	rdev;
229 	uint32_t	blksize;
230 	uint32_t	padding;
231 };
232 
233 struct fuse_kstatfs {
234 	uint64_t	blocks;
235 	uint64_t	bfree;
236 	uint64_t	bavail;
237 	uint64_t	files;
238 	uint64_t	ffree;
239 	uint32_t	bsize;
240 	uint32_t	namelen;
241 	uint32_t	frsize;
242 	uint32_t	padding;
243 	uint32_t	spare[6];
244 };
245 
246 struct fuse_file_lock {
247 	uint64_t	start;
248 	uint64_t	end;
249 	uint32_t	type;
250 	uint32_t	pid; /* tgid */
251 };
252 
253 /**
254  * Bitmasks for fuse_setattr_in.valid
255  */
256 #define FATTR_MODE	(1 << 0)
257 #define FATTR_UID	(1 << 1)
258 #define FATTR_GID	(1 << 2)
259 #define FATTR_SIZE	(1 << 3)
260 #define FATTR_ATIME	(1 << 4)
261 #define FATTR_MTIME	(1 << 5)
262 #define FATTR_FH	(1 << 6)
263 #define FATTR_ATIME_NOW	(1 << 7)
264 #define FATTR_MTIME_NOW	(1 << 8)
265 #define FATTR_LOCKOWNER	(1 << 9)
266 #define FATTR_CTIME	(1 << 10)
267 
268 /**
269  * Flags returned by the OPEN request
270  *
271  * FOPEN_DIRECT_IO: bypass page cache for this open file
272  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
273  * FOPEN_NONSEEKABLE: the file is not seekable
274  * FOPEN_CACHE_DIR: allow caching this directory
275  * FOPEN_STREAM: the file is stream-like (no file position at all)
276  */
277 #define FOPEN_DIRECT_IO		(1 << 0)
278 #define FOPEN_KEEP_CACHE	(1 << 1)
279 #define FOPEN_NONSEEKABLE	(1 << 2)
280 #define FOPEN_CACHE_DIR		(1 << 3)
281 #define FOPEN_STREAM		(1 << 4)
282 
283 /**
284  * INIT request/reply flags
285  *
286  * FUSE_ASYNC_READ: asynchronous read requests
287  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
288  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
289  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
290  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
291  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
292  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
293  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
294  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
295  * FUSE_SPLICE_READ: kernel supports splice read on the device
296  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
297  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
298  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
299  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
300  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
301  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
302  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
303  * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
304  * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
305  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
306  * FUSE_POSIX_ACL: filesystem supports posix acls
307  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
308  * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
309  * FUSE_CACHE_SYMLINKS: cache READLINK responses
310  * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
311  * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
312  * FUSE_MAP_ALIGNMENT: map_alignment field is valid
313  */
314 #define FUSE_ASYNC_READ		(1 << 0)
315 #define FUSE_POSIX_LOCKS	(1 << 1)
316 #define FUSE_FILE_OPS		(1 << 2)
317 #define FUSE_ATOMIC_O_TRUNC	(1 << 3)
318 #define FUSE_EXPORT_SUPPORT	(1 << 4)
319 #define FUSE_BIG_WRITES		(1 << 5)
320 #define FUSE_DONT_MASK		(1 << 6)
321 #define FUSE_SPLICE_WRITE	(1 << 7)
322 #define FUSE_SPLICE_MOVE	(1 << 8)
323 #define FUSE_SPLICE_READ	(1 << 9)
324 #define FUSE_FLOCK_LOCKS	(1 << 10)
325 #define FUSE_HAS_IOCTL_DIR	(1 << 11)
326 #define FUSE_AUTO_INVAL_DATA	(1 << 12)
327 #define FUSE_DO_READDIRPLUS	(1 << 13)
328 #define FUSE_READDIRPLUS_AUTO	(1 << 14)
329 #define FUSE_ASYNC_DIO		(1 << 15)
330 #define FUSE_WRITEBACK_CACHE	(1 << 16)
331 #define FUSE_NO_OPEN_SUPPORT	(1 << 17)
332 #define FUSE_PARALLEL_DIROPS    (1 << 18)
333 #define FUSE_HANDLE_KILLPRIV	(1 << 19)
334 #define FUSE_POSIX_ACL		(1 << 20)
335 #define FUSE_ABORT_ERROR	(1 << 21)
336 #define FUSE_MAX_PAGES		(1 << 22)
337 #define FUSE_CACHE_SYMLINKS	(1 << 23)
338 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
339 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
340 #define FUSE_MAP_ALIGNMENT	(1 << 26)
341 
342 /**
343  * CUSE INIT request/reply flags
344  *
345  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
346  */
347 #define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
348 
349 /**
350  * Release flags
351  */
352 #define FUSE_RELEASE_FLUSH	(1 << 0)
353 #define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
354 
355 /**
356  * Getattr flags
357  */
358 #define FUSE_GETATTR_FH		(1 << 0)
359 
360 /**
361  * Lock flags
362  */
363 #define FUSE_LK_FLOCK		(1 << 0)
364 
365 /**
366  * WRITE flags
367  *
368  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
369  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
370  * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
371  */
372 #define FUSE_WRITE_CACHE	(1 << 0)
373 #define FUSE_WRITE_LOCKOWNER	(1 << 1)
374 #define FUSE_WRITE_KILL_PRIV	(1 << 2)
375 
376 /**
377  * Read flags
378  */
379 #define FUSE_READ_LOCKOWNER	(1 << 1)
380 
381 /**
382  * Ioctl flags
383  *
384  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
385  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
386  * FUSE_IOCTL_RETRY: retry with new iovecs
387  * FUSE_IOCTL_32BIT: 32bit ioctl
388  * FUSE_IOCTL_DIR: is a directory
389  * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
390  *
391  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
392  */
393 #define FUSE_IOCTL_COMPAT	(1 << 0)
394 #define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
395 #define FUSE_IOCTL_RETRY	(1 << 2)
396 #define FUSE_IOCTL_32BIT	(1 << 3)
397 #define FUSE_IOCTL_DIR		(1 << 4)
398 #define FUSE_IOCTL_COMPAT_X32	(1 << 5)
399 
400 #define FUSE_IOCTL_MAX_IOV	256
401 
402 /**
403  * Poll flags
404  *
405  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
406  */
407 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
408 
409 /**
410  * Fsync flags
411  *
412  * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
413  */
414 #define FUSE_FSYNC_FDATASYNC	(1 << 0)
415 
416 enum fuse_opcode {
417 	FUSE_LOOKUP		= 1,
418 	FUSE_FORGET		= 2,  /* no reply */
419 	FUSE_GETATTR		= 3,
420 	FUSE_SETATTR		= 4,
421 	FUSE_READLINK		= 5,
422 	FUSE_SYMLINK		= 6,
423 	FUSE_MKNOD		= 8,
424 	FUSE_MKDIR		= 9,
425 	FUSE_UNLINK		= 10,
426 	FUSE_RMDIR		= 11,
427 	FUSE_RENAME		= 12,
428 	FUSE_LINK		= 13,
429 	FUSE_OPEN		= 14,
430 	FUSE_READ		= 15,
431 	FUSE_WRITE		= 16,
432 	FUSE_STATFS		= 17,
433 	FUSE_RELEASE		= 18,
434 	FUSE_FSYNC		= 20,
435 	FUSE_SETXATTR		= 21,
436 	FUSE_GETXATTR		= 22,
437 	FUSE_LISTXATTR		= 23,
438 	FUSE_REMOVEXATTR	= 24,
439 	FUSE_FLUSH		= 25,
440 	FUSE_INIT		= 26,
441 	FUSE_OPENDIR		= 27,
442 	FUSE_READDIR		= 28,
443 	FUSE_RELEASEDIR		= 29,
444 	FUSE_FSYNCDIR		= 30,
445 	FUSE_GETLK		= 31,
446 	FUSE_SETLK		= 32,
447 	FUSE_SETLKW		= 33,
448 	FUSE_ACCESS		= 34,
449 	FUSE_CREATE		= 35,
450 	FUSE_INTERRUPT		= 36,
451 	FUSE_BMAP		= 37,
452 	FUSE_DESTROY		= 38,
453 	FUSE_IOCTL		= 39,
454 	FUSE_POLL		= 40,
455 	FUSE_NOTIFY_REPLY	= 41,
456 	FUSE_BATCH_FORGET	= 42,
457 	FUSE_FALLOCATE		= 43,
458 	FUSE_READDIRPLUS	= 44,
459 	FUSE_RENAME2		= 45,
460 	FUSE_LSEEK		= 46,
461 	FUSE_COPY_FILE_RANGE	= 47,
462 	FUSE_SETUPMAPPING	= 48,
463 	FUSE_REMOVEMAPPING	= 49,
464 
465 	/* CUSE specific operations */
466 	CUSE_INIT		= 4096,
467 
468 	/* Reserved opcodes: helpful to detect structure endian-ness */
469 	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
470 	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
471 };
472 
473 enum fuse_notify_code {
474 	FUSE_NOTIFY_POLL   = 1,
475 	FUSE_NOTIFY_INVAL_INODE = 2,
476 	FUSE_NOTIFY_INVAL_ENTRY = 3,
477 	FUSE_NOTIFY_STORE = 4,
478 	FUSE_NOTIFY_RETRIEVE = 5,
479 	FUSE_NOTIFY_DELETE = 6,
480 	FUSE_NOTIFY_CODE_MAX,
481 };
482 
483 /* The read buffer is required to be at least 8k, but may be much larger */
484 #define FUSE_MIN_READ_BUFFER 8192
485 
486 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
487 
488 struct fuse_entry_out {
489 	uint64_t	nodeid;		/* Inode ID */
490 	uint64_t	generation;	/* Inode generation: nodeid:gen must
491 					   be unique for the fs's lifetime */
492 	uint64_t	entry_valid;	/* Cache timeout for the name */
493 	uint64_t	attr_valid;	/* Cache timeout for the attributes */
494 	uint32_t	entry_valid_nsec;
495 	uint32_t	attr_valid_nsec;
496 	struct fuse_attr attr;
497 };
498 
499 struct fuse_forget_in {
500 	uint64_t	nlookup;
501 };
502 
503 struct fuse_forget_one {
504 	uint64_t	nodeid;
505 	uint64_t	nlookup;
506 };
507 
508 struct fuse_batch_forget_in {
509 	uint32_t	count;
510 	uint32_t	dummy;
511 };
512 
513 struct fuse_getattr_in {
514 	uint32_t	getattr_flags;
515 	uint32_t	dummy;
516 	uint64_t	fh;
517 };
518 
519 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
520 
521 struct fuse_attr_out {
522 	uint64_t	attr_valid;	/* Cache timeout for the attributes */
523 	uint32_t	attr_valid_nsec;
524 	uint32_t	dummy;
525 	struct fuse_attr attr;
526 };
527 
528 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
529 
530 struct fuse_mknod_in {
531 	uint32_t	mode;
532 	uint32_t	rdev;
533 	uint32_t	umask;
534 	uint32_t	padding;
535 };
536 
537 struct fuse_mkdir_in {
538 	uint32_t	mode;
539 	uint32_t	umask;
540 };
541 
542 struct fuse_rename_in {
543 	uint64_t	newdir;
544 };
545 
546 struct fuse_rename2_in {
547 	uint64_t	newdir;
548 	uint32_t	flags;
549 	uint32_t	padding;
550 };
551 
552 struct fuse_link_in {
553 	uint64_t	oldnodeid;
554 };
555 
556 struct fuse_setattr_in {
557 	uint32_t	valid;
558 	uint32_t	padding;
559 	uint64_t	fh;
560 	uint64_t	size;
561 	uint64_t	lock_owner;
562 	uint64_t	atime;
563 	uint64_t	mtime;
564 	uint64_t	ctime;
565 	uint32_t	atimensec;
566 	uint32_t	mtimensec;
567 	uint32_t	ctimensec;
568 	uint32_t	mode;
569 	uint32_t	unused4;
570 	uint32_t	uid;
571 	uint32_t	gid;
572 	uint32_t	unused5;
573 };
574 
575 struct fuse_open_in {
576 	uint32_t	flags;
577 	uint32_t	unused;
578 };
579 
580 struct fuse_create_in {
581 	uint32_t	flags;
582 	uint32_t	mode;
583 	uint32_t	umask;
584 	uint32_t	padding;
585 };
586 
587 struct fuse_open_out {
588 	uint64_t	fh;
589 	uint32_t	open_flags;
590 	uint32_t	padding;
591 };
592 
593 struct fuse_release_in {
594 	uint64_t	fh;
595 	uint32_t	flags;
596 	uint32_t	release_flags;
597 	uint64_t	lock_owner;
598 };
599 
600 struct fuse_flush_in {
601 	uint64_t	fh;
602 	uint32_t	unused;
603 	uint32_t	padding;
604 	uint64_t	lock_owner;
605 };
606 
607 struct fuse_read_in {
608 	uint64_t	fh;
609 	uint64_t	offset;
610 	uint32_t	size;
611 	uint32_t	read_flags;
612 	uint64_t	lock_owner;
613 	uint32_t	flags;
614 	uint32_t	padding;
615 };
616 
617 #define FUSE_COMPAT_WRITE_IN_SIZE 24
618 
619 struct fuse_write_in {
620 	uint64_t	fh;
621 	uint64_t	offset;
622 	uint32_t	size;
623 	uint32_t	write_flags;
624 	uint64_t	lock_owner;
625 	uint32_t	flags;
626 	uint32_t	padding;
627 };
628 
629 struct fuse_write_out {
630 	uint32_t	size;
631 	uint32_t	padding;
632 };
633 
634 #define FUSE_COMPAT_STATFS_SIZE 48
635 
636 struct fuse_statfs_out {
637 	struct fuse_kstatfs st;
638 };
639 
640 struct fuse_fsync_in {
641 	uint64_t	fh;
642 	uint32_t	fsync_flags;
643 	uint32_t	padding;
644 };
645 
646 struct fuse_setxattr_in {
647 	uint32_t	size;
648 	uint32_t	flags;
649 };
650 
651 struct fuse_getxattr_in {
652 	uint32_t	size;
653 	uint32_t	padding;
654 };
655 
656 struct fuse_getxattr_out {
657 	uint32_t	size;
658 	uint32_t	padding;
659 };
660 
661 struct fuse_lk_in {
662 	uint64_t	fh;
663 	uint64_t	owner;
664 	struct fuse_file_lock lk;
665 	uint32_t	lk_flags;
666 	uint32_t	padding;
667 };
668 
669 struct fuse_lk_out {
670 	struct fuse_file_lock lk;
671 };
672 
673 struct fuse_access_in {
674 	uint32_t	mask;
675 	uint32_t	padding;
676 };
677 
678 struct fuse_init_in {
679 	uint32_t	major;
680 	uint32_t	minor;
681 	uint32_t	max_readahead;
682 	uint32_t	flags;
683 };
684 
685 #define FUSE_COMPAT_INIT_OUT_SIZE 8
686 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
687 
688 struct fuse_init_out {
689 	uint32_t	major;
690 	uint32_t	minor;
691 	uint32_t	max_readahead;
692 	uint32_t	flags;
693 	uint16_t	max_background;
694 	uint16_t	congestion_threshold;
695 	uint32_t	max_write;
696 	uint32_t	time_gran;
697 	uint16_t	max_pages;
698 	uint16_t	map_alignment;
699 	uint32_t	unused[8];
700 };
701 
702 #define CUSE_INIT_INFO_MAX 4096
703 
704 struct cuse_init_in {
705 	uint32_t	major;
706 	uint32_t	minor;
707 	uint32_t	unused;
708 	uint32_t	flags;
709 };
710 
711 struct cuse_init_out {
712 	uint32_t	major;
713 	uint32_t	minor;
714 	uint32_t	unused;
715 	uint32_t	flags;
716 	uint32_t	max_read;
717 	uint32_t	max_write;
718 	uint32_t	dev_major;		/* chardev major */
719 	uint32_t	dev_minor;		/* chardev minor */
720 	uint32_t	spare[10];
721 };
722 
723 struct fuse_interrupt_in {
724 	uint64_t	unique;
725 };
726 
727 struct fuse_bmap_in {
728 	uint64_t	block;
729 	uint32_t	blocksize;
730 	uint32_t	padding;
731 };
732 
733 struct fuse_bmap_out {
734 	uint64_t	block;
735 };
736 
737 struct fuse_ioctl_in {
738 	uint64_t	fh;
739 	uint32_t	flags;
740 	uint32_t	cmd;
741 	uint64_t	arg;
742 	uint32_t	in_size;
743 	uint32_t	out_size;
744 };
745 
746 struct fuse_ioctl_iovec {
747 	uint64_t	base;
748 	uint64_t	len;
749 };
750 
751 struct fuse_ioctl_out {
752 	int32_t		result;
753 	uint32_t	flags;
754 	uint32_t	in_iovs;
755 	uint32_t	out_iovs;
756 };
757 
758 struct fuse_poll_in {
759 	uint64_t	fh;
760 	uint64_t	kh;
761 	uint32_t	flags;
762 	uint32_t	events;
763 };
764 
765 struct fuse_poll_out {
766 	uint32_t	revents;
767 	uint32_t	padding;
768 };
769 
770 struct fuse_notify_poll_wakeup_out {
771 	uint64_t	kh;
772 };
773 
774 struct fuse_fallocate_in {
775 	uint64_t	fh;
776 	uint64_t	offset;
777 	uint64_t	length;
778 	uint32_t	mode;
779 	uint32_t	padding;
780 };
781 
782 struct fuse_in_header {
783 	uint32_t	len;
784 	uint32_t	opcode;
785 	uint64_t	unique;
786 	uint64_t	nodeid;
787 	uint32_t	uid;
788 	uint32_t	gid;
789 	uint32_t	pid;
790 	uint32_t	padding;
791 };
792 
793 struct fuse_out_header {
794 	uint32_t	len;
795 	int32_t		error;
796 	uint64_t	unique;
797 };
798 
799 struct fuse_dirent {
800 	uint64_t	ino;
801 	uint64_t	off;
802 	uint32_t	namelen;
803 	uint32_t	type;
804 	char name[];
805 };
806 
807 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
808 #define FUSE_DIRENT_ALIGN(x) \
809 	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
810 #define FUSE_DIRENT_SIZE(d) \
811 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
812 
813 struct fuse_direntplus {
814 	struct fuse_entry_out entry_out;
815 	struct fuse_dirent dirent;
816 };
817 
818 #define FUSE_NAME_OFFSET_DIRENTPLUS \
819 	offsetof(struct fuse_direntplus, dirent.name)
820 #define FUSE_DIRENTPLUS_SIZE(d) \
821 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
822 
823 struct fuse_notify_inval_inode_out {
824 	uint64_t	ino;
825 	int64_t		off;
826 	int64_t		len;
827 };
828 
829 struct fuse_notify_inval_entry_out {
830 	uint64_t	parent;
831 	uint32_t	namelen;
832 	uint32_t	padding;
833 };
834 
835 struct fuse_notify_delete_out {
836 	uint64_t	parent;
837 	uint64_t	child;
838 	uint32_t	namelen;
839 	uint32_t	padding;
840 };
841 
842 struct fuse_notify_store_out {
843 	uint64_t	nodeid;
844 	uint64_t	offset;
845 	uint32_t	size;
846 	uint32_t	padding;
847 };
848 
849 struct fuse_notify_retrieve_out {
850 	uint64_t	notify_unique;
851 	uint64_t	nodeid;
852 	uint64_t	offset;
853 	uint32_t	size;
854 	uint32_t	padding;
855 };
856 
857 /* Matches the size of fuse_write_in */
858 struct fuse_notify_retrieve_in {
859 	uint64_t	dummy1;
860 	uint64_t	offset;
861 	uint32_t	size;
862 	uint32_t	dummy2;
863 	uint64_t	dummy3;
864 	uint64_t	dummy4;
865 };
866 
867 /* Device ioctls: */
868 #define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
869 
870 struct fuse_lseek_in {
871 	uint64_t	fh;
872 	uint64_t	offset;
873 	uint32_t	whence;
874 	uint32_t	padding;
875 };
876 
877 struct fuse_lseek_out {
878 	uint64_t	offset;
879 };
880 
881 struct fuse_copy_file_range_in {
882 	uint64_t	fh_in;
883 	uint64_t	off_in;
884 	uint64_t	nodeid_out;
885 	uint64_t	fh_out;
886 	uint64_t	off_out;
887 	uint64_t	len;
888 	uint64_t	flags;
889 };
890 
891 #endif /* _LINUX_FUSE_H */
892