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  *  7.32
177  *  - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS
178  *
179  *  7.33
180  *  - add FUSE_HANDLE_KILLPRIV_V2, FUSE_WRITE_KILL_SUIDGID, FATTR_KILL_SUIDGID
181  *  - add FUSE_OPEN_KILL_SUIDGID
182  *  - extend fuse_setxattr_in, add FUSE_SETXATTR_EXT
183  *  - add FUSE_SETXATTR_ACL_KILL_SGID
184  */
185 
186 #ifndef _LINUX_FUSE_H
187 #define _LINUX_FUSE_H
188 
189 #include <stdint.h>
190 
191 /*
192  * Version negotiation:
193  *
194  * Both the kernel and userspace send the version they support in the
195  * INIT request and reply respectively.
196  *
197  * If the major versions match then both shall use the smallest
198  * of the two minor versions for communication.
199  *
200  * If the kernel supports a larger major version, then userspace shall
201  * reply with the major version it supports, ignore the rest of the
202  * INIT message and expect a new INIT message from the kernel with a
203  * matching major version.
204  *
205  * If the library supports a larger major version, then it shall fall
206  * back to the major protocol version sent by the kernel for
207  * communication and reply with that major version (and an arbitrary
208  * supported minor version).
209  */
210 
211 /** Version number of this interface */
212 #define FUSE_KERNEL_VERSION 7
213 
214 /** Minor version number of this interface */
215 #define FUSE_KERNEL_MINOR_VERSION 33
216 
217 /** The node ID of the root inode */
218 #define FUSE_ROOT_ID 1
219 
220 /* Make sure all structures are padded to 64bit boundary, so 32bit
221    userspace works under 64bit kernels */
222 
223 struct fuse_attr {
224 	uint64_t	ino;
225 	uint64_t	size;
226 	uint64_t	blocks;
227 	uint64_t	atime;
228 	uint64_t	mtime;
229 	uint64_t	ctime;
230 	uint32_t	atimensec;
231 	uint32_t	mtimensec;
232 	uint32_t	ctimensec;
233 	uint32_t	mode;
234 	uint32_t	nlink;
235 	uint32_t	uid;
236 	uint32_t	gid;
237 	uint32_t	rdev;
238 	uint32_t	blksize;
239 	uint32_t	flags;
240 };
241 
242 struct fuse_kstatfs {
243 	uint64_t	blocks;
244 	uint64_t	bfree;
245 	uint64_t	bavail;
246 	uint64_t	files;
247 	uint64_t	ffree;
248 	uint32_t	bsize;
249 	uint32_t	namelen;
250 	uint32_t	frsize;
251 	uint32_t	padding;
252 	uint32_t	spare[6];
253 };
254 
255 struct fuse_file_lock {
256 	uint64_t	start;
257 	uint64_t	end;
258 	uint32_t	type;
259 	uint32_t	pid; /* tgid */
260 };
261 
262 /**
263  * Bitmasks for fuse_setattr_in.valid
264  */
265 #define FATTR_MODE	(1 << 0)
266 #define FATTR_UID	(1 << 1)
267 #define FATTR_GID	(1 << 2)
268 #define FATTR_SIZE	(1 << 3)
269 #define FATTR_ATIME	(1 << 4)
270 #define FATTR_MTIME	(1 << 5)
271 #define FATTR_FH	(1 << 6)
272 #define FATTR_ATIME_NOW	(1 << 7)
273 #define FATTR_MTIME_NOW	(1 << 8)
274 #define FATTR_LOCKOWNER	(1 << 9)
275 #define FATTR_CTIME	(1 << 10)
276 #define FATTR_KILL_SUIDGID	(1 << 11)
277 
278 /**
279  * Flags returned by the OPEN request
280  *
281  * FOPEN_DIRECT_IO: bypass page cache for this open file
282  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
283  * FOPEN_NONSEEKABLE: the file is not seekable
284  * FOPEN_CACHE_DIR: allow caching this directory
285  * FOPEN_STREAM: the file is stream-like (no file position at all)
286  */
287 #define FOPEN_DIRECT_IO		(1 << 0)
288 #define FOPEN_KEEP_CACHE	(1 << 1)
289 #define FOPEN_NONSEEKABLE	(1 << 2)
290 #define FOPEN_CACHE_DIR		(1 << 3)
291 #define FOPEN_STREAM		(1 << 4)
292 
293 /**
294  * INIT request/reply flags
295  *
296  * FUSE_ASYNC_READ: asynchronous read requests
297  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
298  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
299  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
300  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
301  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
302  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
303  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
304  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
305  * FUSE_SPLICE_READ: kernel supports splice read on the device
306  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
307  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
308  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
309  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
310  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
311  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
312  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
313  * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
314  * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
315  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
316  * FUSE_POSIX_ACL: filesystem supports posix acls
317  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
318  * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
319  * FUSE_CACHE_SYMLINKS: cache READLINK responses
320  * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
321  * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
322  * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for
323  *		       foffset and moffset fields in struct
324  *		       fuse_setupmapping_out and fuse_removemapping_one.
325  * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts
326  * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc.
327  *			Upon write/truncate suid/sgid is only killed if caller
328  *			does not have CAP_FSETID. Additionally upon
329  *			write/truncate sgid is killed only if file has group
330  *			execute permission. (Same as Linux VFS behavior).
331  * FUSE_SETXATTR_EXT:	Server supports extended struct fuse_setxattr_in
332  */
333 #define FUSE_ASYNC_READ		(1 << 0)
334 #define FUSE_POSIX_LOCKS	(1 << 1)
335 #define FUSE_FILE_OPS		(1 << 2)
336 #define FUSE_ATOMIC_O_TRUNC	(1 << 3)
337 #define FUSE_EXPORT_SUPPORT	(1 << 4)
338 #define FUSE_BIG_WRITES		(1 << 5)
339 #define FUSE_DONT_MASK		(1 << 6)
340 #define FUSE_SPLICE_WRITE	(1 << 7)
341 #define FUSE_SPLICE_MOVE	(1 << 8)
342 #define FUSE_SPLICE_READ	(1 << 9)
343 #define FUSE_FLOCK_LOCKS	(1 << 10)
344 #define FUSE_HAS_IOCTL_DIR	(1 << 11)
345 #define FUSE_AUTO_INVAL_DATA	(1 << 12)
346 #define FUSE_DO_READDIRPLUS	(1 << 13)
347 #define FUSE_READDIRPLUS_AUTO	(1 << 14)
348 #define FUSE_ASYNC_DIO		(1 << 15)
349 #define FUSE_WRITEBACK_CACHE	(1 << 16)
350 #define FUSE_NO_OPEN_SUPPORT	(1 << 17)
351 #define FUSE_PARALLEL_DIROPS    (1 << 18)
352 #define FUSE_HANDLE_KILLPRIV	(1 << 19)
353 #define FUSE_POSIX_ACL		(1 << 20)
354 #define FUSE_ABORT_ERROR	(1 << 21)
355 #define FUSE_MAX_PAGES		(1 << 22)
356 #define FUSE_CACHE_SYMLINKS	(1 << 23)
357 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
358 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
359 #define FUSE_MAP_ALIGNMENT	(1 << 26)
360 #define FUSE_SUBMOUNTS		(1 << 27)
361 #define FUSE_HANDLE_KILLPRIV_V2	(1 << 28)
362 #define FUSE_SETXATTR_EXT	(1 << 29)
363 
364 /**
365  * CUSE INIT request/reply flags
366  *
367  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
368  */
369 #define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
370 
371 /**
372  * Release flags
373  */
374 #define FUSE_RELEASE_FLUSH	(1 << 0)
375 #define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
376 
377 /**
378  * Getattr flags
379  */
380 #define FUSE_GETATTR_FH		(1 << 0)
381 
382 /**
383  * Lock flags
384  */
385 #define FUSE_LK_FLOCK		(1 << 0)
386 
387 /**
388  * WRITE flags
389  *
390  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
391  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
392  * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits
393  */
394 #define FUSE_WRITE_CACHE	(1 << 0)
395 #define FUSE_WRITE_LOCKOWNER	(1 << 1)
396 #define FUSE_WRITE_KILL_SUIDGID (1 << 2)
397 
398 /* Obsolete alias; this flag implies killing suid/sgid only. */
399 #define FUSE_WRITE_KILL_PRIV	FUSE_WRITE_KILL_SUIDGID
400 
401 /**
402  * Read flags
403  */
404 #define FUSE_READ_LOCKOWNER	(1 << 1)
405 
406 /**
407  * Ioctl flags
408  *
409  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
410  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
411  * FUSE_IOCTL_RETRY: retry with new iovecs
412  * FUSE_IOCTL_32BIT: 32bit ioctl
413  * FUSE_IOCTL_DIR: is a directory
414  * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
415  *
416  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
417  */
418 #define FUSE_IOCTL_COMPAT	(1 << 0)
419 #define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
420 #define FUSE_IOCTL_RETRY	(1 << 2)
421 #define FUSE_IOCTL_32BIT	(1 << 3)
422 #define FUSE_IOCTL_DIR		(1 << 4)
423 #define FUSE_IOCTL_COMPAT_X32	(1 << 5)
424 
425 #define FUSE_IOCTL_MAX_IOV	256
426 
427 /**
428  * Poll flags
429  *
430  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
431  */
432 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
433 
434 /**
435  * Fsync flags
436  *
437  * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
438  */
439 #define FUSE_FSYNC_FDATASYNC	(1 << 0)
440 
441 /**
442  * fuse_attr flags
443  *
444  * FUSE_ATTR_SUBMOUNT: Object is a submount root
445  */
446 #define FUSE_ATTR_SUBMOUNT      (1 << 0)
447 
448 /**
449  * Open flags
450  * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable
451  */
452 #define FUSE_OPEN_KILL_SUIDGID	(1 << 0)
453 
454 /**
455  * setxattr flags
456  * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set
457  */
458 #define FUSE_SETXATTR_ACL_KILL_SGID	(1 << 0)
459 
460 enum fuse_opcode {
461 	FUSE_LOOKUP		= 1,
462 	FUSE_FORGET		= 2,  /* no reply */
463 	FUSE_GETATTR		= 3,
464 	FUSE_SETATTR		= 4,
465 	FUSE_READLINK		= 5,
466 	FUSE_SYMLINK		= 6,
467 	FUSE_MKNOD		= 8,
468 	FUSE_MKDIR		= 9,
469 	FUSE_UNLINK		= 10,
470 	FUSE_RMDIR		= 11,
471 	FUSE_RENAME		= 12,
472 	FUSE_LINK		= 13,
473 	FUSE_OPEN		= 14,
474 	FUSE_READ		= 15,
475 	FUSE_WRITE		= 16,
476 	FUSE_STATFS		= 17,
477 	FUSE_RELEASE		= 18,
478 	FUSE_FSYNC		= 20,
479 	FUSE_SETXATTR		= 21,
480 	FUSE_GETXATTR		= 22,
481 	FUSE_LISTXATTR		= 23,
482 	FUSE_REMOVEXATTR	= 24,
483 	FUSE_FLUSH		= 25,
484 	FUSE_INIT		= 26,
485 	FUSE_OPENDIR		= 27,
486 	FUSE_READDIR		= 28,
487 	FUSE_RELEASEDIR		= 29,
488 	FUSE_FSYNCDIR		= 30,
489 	FUSE_GETLK		= 31,
490 	FUSE_SETLK		= 32,
491 	FUSE_SETLKW		= 33,
492 	FUSE_ACCESS		= 34,
493 	FUSE_CREATE		= 35,
494 	FUSE_INTERRUPT		= 36,
495 	FUSE_BMAP		= 37,
496 	FUSE_DESTROY		= 38,
497 	FUSE_IOCTL		= 39,
498 	FUSE_POLL		= 40,
499 	FUSE_NOTIFY_REPLY	= 41,
500 	FUSE_BATCH_FORGET	= 42,
501 	FUSE_FALLOCATE		= 43,
502 	FUSE_READDIRPLUS	= 44,
503 	FUSE_RENAME2		= 45,
504 	FUSE_LSEEK		= 46,
505 	FUSE_COPY_FILE_RANGE	= 47,
506 	FUSE_SETUPMAPPING	= 48,
507 	FUSE_REMOVEMAPPING	= 49,
508 
509 	/* CUSE specific operations */
510 	CUSE_INIT		= 4096,
511 
512 	/* Reserved opcodes: helpful to detect structure endian-ness */
513 	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
514 	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
515 };
516 
517 enum fuse_notify_code {
518 	FUSE_NOTIFY_POLL   = 1,
519 	FUSE_NOTIFY_INVAL_INODE = 2,
520 	FUSE_NOTIFY_INVAL_ENTRY = 3,
521 	FUSE_NOTIFY_STORE = 4,
522 	FUSE_NOTIFY_RETRIEVE = 5,
523 	FUSE_NOTIFY_DELETE = 6,
524 	FUSE_NOTIFY_CODE_MAX,
525 };
526 
527 /* The read buffer is required to be at least 8k, but may be much larger */
528 #define FUSE_MIN_READ_BUFFER 8192
529 
530 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
531 
532 struct fuse_entry_out {
533 	uint64_t	nodeid;		/* Inode ID */
534 	uint64_t	generation;	/* Inode generation: nodeid:gen must
535 					   be unique for the fs's lifetime */
536 	uint64_t	entry_valid;	/* Cache timeout for the name */
537 	uint64_t	attr_valid;	/* Cache timeout for the attributes */
538 	uint32_t	entry_valid_nsec;
539 	uint32_t	attr_valid_nsec;
540 	struct fuse_attr attr;
541 };
542 
543 struct fuse_forget_in {
544 	uint64_t	nlookup;
545 };
546 
547 struct fuse_forget_one {
548 	uint64_t	nodeid;
549 	uint64_t	nlookup;
550 };
551 
552 struct fuse_batch_forget_in {
553 	uint32_t	count;
554 	uint32_t	dummy;
555 };
556 
557 struct fuse_getattr_in {
558 	uint32_t	getattr_flags;
559 	uint32_t	dummy;
560 	uint64_t	fh;
561 };
562 
563 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
564 
565 struct fuse_attr_out {
566 	uint64_t	attr_valid;	/* Cache timeout for the attributes */
567 	uint32_t	attr_valid_nsec;
568 	uint32_t	dummy;
569 	struct fuse_attr attr;
570 };
571 
572 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
573 
574 struct fuse_mknod_in {
575 	uint32_t	mode;
576 	uint32_t	rdev;
577 	uint32_t	umask;
578 	uint32_t	padding;
579 };
580 
581 struct fuse_mkdir_in {
582 	uint32_t	mode;
583 	uint32_t	umask;
584 };
585 
586 struct fuse_rename_in {
587 	uint64_t	newdir;
588 };
589 
590 struct fuse_rename2_in {
591 	uint64_t	newdir;
592 	uint32_t	flags;
593 	uint32_t	padding;
594 };
595 
596 struct fuse_link_in {
597 	uint64_t	oldnodeid;
598 };
599 
600 struct fuse_setattr_in {
601 	uint32_t	valid;
602 	uint32_t	padding;
603 	uint64_t	fh;
604 	uint64_t	size;
605 	uint64_t	lock_owner;
606 	uint64_t	atime;
607 	uint64_t	mtime;
608 	uint64_t	ctime;
609 	uint32_t	atimensec;
610 	uint32_t	mtimensec;
611 	uint32_t	ctimensec;
612 	uint32_t	mode;
613 	uint32_t	unused4;
614 	uint32_t	uid;
615 	uint32_t	gid;
616 	uint32_t	unused5;
617 };
618 
619 struct fuse_open_in {
620 	uint32_t	flags;
621 	uint32_t	open_flags;	/* FUSE_OPEN_... */
622 };
623 
624 struct fuse_create_in {
625 	uint32_t	flags;
626 	uint32_t	mode;
627 	uint32_t	umask;
628 	uint32_t	open_flags;	/* FUSE_OPEN_... */
629 };
630 
631 struct fuse_open_out {
632 	uint64_t	fh;
633 	uint32_t	open_flags;
634 	uint32_t	padding;
635 };
636 
637 struct fuse_release_in {
638 	uint64_t	fh;
639 	uint32_t	flags;
640 	uint32_t	release_flags;
641 	uint64_t	lock_owner;
642 };
643 
644 struct fuse_flush_in {
645 	uint64_t	fh;
646 	uint32_t	unused;
647 	uint32_t	padding;
648 	uint64_t	lock_owner;
649 };
650 
651 struct fuse_read_in {
652 	uint64_t	fh;
653 	uint64_t	offset;
654 	uint32_t	size;
655 	uint32_t	read_flags;
656 	uint64_t	lock_owner;
657 	uint32_t	flags;
658 	uint32_t	padding;
659 };
660 
661 #define FUSE_COMPAT_WRITE_IN_SIZE 24
662 
663 struct fuse_write_in {
664 	uint64_t	fh;
665 	uint64_t	offset;
666 	uint32_t	size;
667 	uint32_t	write_flags;
668 	uint64_t	lock_owner;
669 	uint32_t	flags;
670 	uint32_t	padding;
671 };
672 
673 struct fuse_write_out {
674 	uint32_t	size;
675 	uint32_t	padding;
676 };
677 
678 #define FUSE_COMPAT_STATFS_SIZE 48
679 
680 struct fuse_statfs_out {
681 	struct fuse_kstatfs st;
682 };
683 
684 struct fuse_fsync_in {
685 	uint64_t	fh;
686 	uint32_t	fsync_flags;
687 	uint32_t	padding;
688 };
689 
690 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8
691 
692 struct fuse_setxattr_in {
693 	uint32_t	size;
694 	uint32_t	flags;
695 	uint32_t	setxattr_flags;
696 	uint32_t	padding;
697 };
698 
699 struct fuse_getxattr_in {
700 	uint32_t	size;
701 	uint32_t	padding;
702 };
703 
704 struct fuse_getxattr_out {
705 	uint32_t	size;
706 	uint32_t	padding;
707 };
708 
709 struct fuse_lk_in {
710 	uint64_t	fh;
711 	uint64_t	owner;
712 	struct fuse_file_lock lk;
713 	uint32_t	lk_flags;
714 	uint32_t	padding;
715 };
716 
717 struct fuse_lk_out {
718 	struct fuse_file_lock lk;
719 };
720 
721 struct fuse_access_in {
722 	uint32_t	mask;
723 	uint32_t	padding;
724 };
725 
726 struct fuse_init_in {
727 	uint32_t	major;
728 	uint32_t	minor;
729 	uint32_t	max_readahead;
730 	uint32_t	flags;
731 };
732 
733 #define FUSE_COMPAT_INIT_OUT_SIZE 8
734 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
735 
736 struct fuse_init_out {
737 	uint32_t	major;
738 	uint32_t	minor;
739 	uint32_t	max_readahead;
740 	uint32_t	flags;
741 	uint16_t	max_background;
742 	uint16_t	congestion_threshold;
743 	uint32_t	max_write;
744 	uint32_t	time_gran;
745 	uint16_t	max_pages;
746 	uint16_t	map_alignment;
747 	uint32_t	unused[8];
748 };
749 
750 #define CUSE_INIT_INFO_MAX 4096
751 
752 struct cuse_init_in {
753 	uint32_t	major;
754 	uint32_t	minor;
755 	uint32_t	unused;
756 	uint32_t	flags;
757 };
758 
759 struct cuse_init_out {
760 	uint32_t	major;
761 	uint32_t	minor;
762 	uint32_t	unused;
763 	uint32_t	flags;
764 	uint32_t	max_read;
765 	uint32_t	max_write;
766 	uint32_t	dev_major;		/* chardev major */
767 	uint32_t	dev_minor;		/* chardev minor */
768 	uint32_t	spare[10];
769 };
770 
771 struct fuse_interrupt_in {
772 	uint64_t	unique;
773 };
774 
775 struct fuse_bmap_in {
776 	uint64_t	block;
777 	uint32_t	blocksize;
778 	uint32_t	padding;
779 };
780 
781 struct fuse_bmap_out {
782 	uint64_t	block;
783 };
784 
785 struct fuse_ioctl_in {
786 	uint64_t	fh;
787 	uint32_t	flags;
788 	uint32_t	cmd;
789 	uint64_t	arg;
790 	uint32_t	in_size;
791 	uint32_t	out_size;
792 };
793 
794 struct fuse_ioctl_iovec {
795 	uint64_t	base;
796 	uint64_t	len;
797 };
798 
799 struct fuse_ioctl_out {
800 	int32_t		result;
801 	uint32_t	flags;
802 	uint32_t	in_iovs;
803 	uint32_t	out_iovs;
804 };
805 
806 struct fuse_poll_in {
807 	uint64_t	fh;
808 	uint64_t	kh;
809 	uint32_t	flags;
810 	uint32_t	events;
811 };
812 
813 struct fuse_poll_out {
814 	uint32_t	revents;
815 	uint32_t	padding;
816 };
817 
818 struct fuse_notify_poll_wakeup_out {
819 	uint64_t	kh;
820 };
821 
822 struct fuse_fallocate_in {
823 	uint64_t	fh;
824 	uint64_t	offset;
825 	uint64_t	length;
826 	uint32_t	mode;
827 	uint32_t	padding;
828 };
829 
830 struct fuse_in_header {
831 	uint32_t	len;
832 	uint32_t	opcode;
833 	uint64_t	unique;
834 	uint64_t	nodeid;
835 	uint32_t	uid;
836 	uint32_t	gid;
837 	uint32_t	pid;
838 	uint32_t	padding;
839 };
840 
841 struct fuse_out_header {
842 	uint32_t	len;
843 	int32_t		error;
844 	uint64_t	unique;
845 };
846 
847 struct fuse_dirent {
848 	uint64_t	ino;
849 	uint64_t	off;
850 	uint32_t	namelen;
851 	uint32_t	type;
852 	char name[];
853 };
854 
855 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
856 #define FUSE_DIRENT_ALIGN(x) \
857 	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
858 #define FUSE_DIRENT_SIZE(d) \
859 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
860 
861 struct fuse_direntplus {
862 	struct fuse_entry_out entry_out;
863 	struct fuse_dirent dirent;
864 };
865 
866 #define FUSE_NAME_OFFSET_DIRENTPLUS \
867 	offsetof(struct fuse_direntplus, dirent.name)
868 #define FUSE_DIRENTPLUS_SIZE(d) \
869 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
870 
871 struct fuse_notify_inval_inode_out {
872 	uint64_t	ino;
873 	int64_t		off;
874 	int64_t		len;
875 };
876 
877 struct fuse_notify_inval_entry_out {
878 	uint64_t	parent;
879 	uint32_t	namelen;
880 	uint32_t	padding;
881 };
882 
883 struct fuse_notify_delete_out {
884 	uint64_t	parent;
885 	uint64_t	child;
886 	uint32_t	namelen;
887 	uint32_t	padding;
888 };
889 
890 struct fuse_notify_store_out {
891 	uint64_t	nodeid;
892 	uint64_t	offset;
893 	uint32_t	size;
894 	uint32_t	padding;
895 };
896 
897 struct fuse_notify_retrieve_out {
898 	uint64_t	notify_unique;
899 	uint64_t	nodeid;
900 	uint64_t	offset;
901 	uint32_t	size;
902 	uint32_t	padding;
903 };
904 
905 /* Matches the size of fuse_write_in */
906 struct fuse_notify_retrieve_in {
907 	uint64_t	dummy1;
908 	uint64_t	offset;
909 	uint32_t	size;
910 	uint32_t	dummy2;
911 	uint64_t	dummy3;
912 	uint64_t	dummy4;
913 };
914 
915 /* Device ioctls: */
916 #define FUSE_DEV_IOC_MAGIC		229
917 #define FUSE_DEV_IOC_CLONE		_IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
918 
919 struct fuse_lseek_in {
920 	uint64_t	fh;
921 	uint64_t	offset;
922 	uint32_t	whence;
923 	uint32_t	padding;
924 };
925 
926 struct fuse_lseek_out {
927 	uint64_t	offset;
928 };
929 
930 struct fuse_copy_file_range_in {
931 	uint64_t	fh_in;
932 	uint64_t	off_in;
933 	uint64_t	nodeid_out;
934 	uint64_t	fh_out;
935 	uint64_t	off_out;
936 	uint64_t	len;
937 	uint64_t	flags;
938 };
939 
940 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
941 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
942 struct fuse_setupmapping_in {
943 	/* An already open handle */
944 	uint64_t	fh;
945 	/* Offset into the file to start the mapping */
946 	uint64_t	foffset;
947 	/* Length of mapping required */
948 	uint64_t	len;
949 	/* Flags, FUSE_SETUPMAPPING_FLAG_* */
950 	uint64_t	flags;
951 	/* Offset in Memory Window */
952 	uint64_t	moffset;
953 };
954 
955 struct fuse_removemapping_in {
956 	/* number of fuse_removemapping_one follows */
957 	uint32_t        count;
958 };
959 
960 struct fuse_removemapping_one {
961 	/* Offset into the dax window start the unmapping */
962 	uint64_t        moffset;
963 	/* Length of mapping required */
964 	uint64_t	len;
965 };
966 
967 #define FUSE_REMOVEMAPPING_MAX_ENTRY   \
968 		(PAGE_SIZE / sizeof(struct fuse_removemapping_one))
969 
970 #endif /* _LINUX_FUSE_H */
971