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