libfuse

fuse_kernel.h
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 * 7.34
186 * - add FUSE_SYNCFS
187 *
188 * 7.35
189 * - add FOPEN_NOFLUSH
190 *
191 * 7.36
192 * - extend fuse_init_in with reserved fields, add FUSE_INIT_EXT init flag
193 * - add flags2 to fuse_init_in and fuse_init_out
194 * - add FUSE_SECURITY_CTX init flag
195 * - add security context to create, mkdir, symlink, and mknod requests
196 * - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX
197 *
198 * 7.37
199 * - add FUSE_TMPFILE
200 *
201 * 7.38
202 * - add FUSE_EXPIRE_ONLY flag to fuse_notify_inval_entry
203 */
204
205 #ifndef _LINUX_FUSE_H
206 #define _LINUX_FUSE_H
207
208 #ifdef __KERNEL__
209 #include <linux/types.h>
210 #else
211 #include <stdint.h>
212 #endif
213
214 /*
215 * Version negotiation:
216 *
217 * Both the kernel and userspace send the version they support in the
218 * INIT request and reply respectively.
219 *
220 * If the major versions match then both shall use the smallest
221 * of the two minor versions for communication.
222 *
223 * If the kernel supports a larger major version, then userspace shall
224 * reply with the major version it supports, ignore the rest of the
225 * INIT message and expect a new INIT message from the kernel with a
226 * matching major version.
227 *
228 * If the library supports a larger major version, then it shall fall
229 * back to the major protocol version sent by the kernel for
230 * communication and reply with that major version (and an arbitrary
231 * supported minor version).
232 */
233
235 #define FUSE_KERNEL_VERSION 7
236
238 #define FUSE_KERNEL_MINOR_VERSION 38
239
241 #define FUSE_ROOT_ID 1
242
243 /* Make sure all structures are padded to 64bit boundary, so 32bit
244 userspace works under 64bit kernels */
245
246 struct fuse_attr {
247 uint64_t ino;
248 uint64_t size;
249 uint64_t blocks;
250 uint64_t atime;
251 uint64_t mtime;
252 uint64_t ctime;
253 uint32_t atimensec;
254 uint32_t mtimensec;
255 uint32_t ctimensec;
256 uint32_t mode;
257 uint32_t nlink;
258 uint32_t uid;
259 uint32_t gid;
260 uint32_t rdev;
261 uint32_t blksize;
262 uint32_t flags;
263 };
264
265 struct fuse_kstatfs {
266 uint64_t blocks;
267 uint64_t bfree;
268 uint64_t bavail;
269 uint64_t files;
270 uint64_t ffree;
271 uint32_t bsize;
272 uint32_t namelen;
273 uint32_t frsize;
274 uint32_t padding;
275 uint32_t spare[6];
276 };
277
278 struct fuse_file_lock {
279 uint64_t start;
280 uint64_t end;
281 uint32_t type;
282 uint32_t pid; /* tgid */
283 };
284
288 #define FATTR_MODE (1 << 0)
289 #define FATTR_UID (1 << 1)
290 #define FATTR_GID (1 << 2)
291 #define FATTR_SIZE (1 << 3)
292 #define FATTR_ATIME (1 << 4)
293 #define FATTR_MTIME (1 << 5)
294 #define FATTR_FH (1 << 6)
295 #define FATTR_ATIME_NOW (1 << 7)
296 #define FATTR_MTIME_NOW (1 << 8)
297 #define FATTR_LOCKOWNER (1 << 9)
298 #define FATTR_CTIME (1 << 10)
299 #define FATTR_KILL_SUIDGID (1 << 11)
300
311 #define FOPEN_DIRECT_IO (1 << 0)
312 #define FOPEN_KEEP_CACHE (1 << 1)
313 #define FOPEN_NONSEEKABLE (1 << 2)
314 #define FOPEN_CACHE_DIR (1 << 3)
315 #define FOPEN_STREAM (1 << 4)
316 #define FOPEN_NOFLUSH (1 << 5)
317
363 #define FUSE_ASYNC_READ (1 << 0)
364 #define FUSE_POSIX_LOCKS (1 << 1)
365 #define FUSE_FILE_OPS (1 << 2)
366 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
367 #define FUSE_EXPORT_SUPPORT (1 << 4)
368 #define FUSE_BIG_WRITES (1 << 5)
369 #define FUSE_DONT_MASK (1 << 6)
370 #define FUSE_SPLICE_WRITE (1 << 7)
371 #define FUSE_SPLICE_MOVE (1 << 8)
372 #define FUSE_SPLICE_READ (1 << 9)
373 #define FUSE_FLOCK_LOCKS (1 << 10)
374 #define FUSE_HAS_IOCTL_DIR (1 << 11)
375 #define FUSE_AUTO_INVAL_DATA (1 << 12)
376 #define FUSE_DO_READDIRPLUS (1 << 13)
377 #define FUSE_READDIRPLUS_AUTO (1 << 14)
378 #define FUSE_ASYNC_DIO (1 << 15)
379 #define FUSE_WRITEBACK_CACHE (1 << 16)
380 #define FUSE_NO_OPEN_SUPPORT (1 << 17)
381 #define FUSE_PARALLEL_DIROPS (1 << 18)
382 #define FUSE_HANDLE_KILLPRIV (1 << 19)
383 #define FUSE_POSIX_ACL (1 << 20)
384 #define FUSE_ABORT_ERROR (1 << 21)
385 #define FUSE_MAX_PAGES (1 << 22)
386 #define FUSE_CACHE_SYMLINKS (1 << 23)
387 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
388 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
389 #define FUSE_MAP_ALIGNMENT (1 << 26)
390 #define FUSE_SUBMOUNTS (1 << 27)
391 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
392 #define FUSE_SETXATTR_EXT (1 << 29)
393 #define FUSE_INIT_EXT (1 << 30)
394 #define FUSE_INIT_RESERVED (1 << 31)
395 /* bits 32..63 get shifted down 32 bits into the flags2 field */
396 #define FUSE_SECURITY_CTX (1ULL << 32)
397 #define FUSE_HAS_INODE_DAX (1ULL << 33)
398
404 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
405
409 #define FUSE_RELEASE_FLUSH (1 << 0)
410 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1)
411
415 #define FUSE_GETATTR_FH (1 << 0)
416
420 #define FUSE_LK_FLOCK (1 << 0)
421
429 #define FUSE_WRITE_CACHE (1 << 0)
430 #define FUSE_WRITE_LOCKOWNER (1 << 1)
431 #define FUSE_WRITE_KILL_SUIDGID (1 << 2)
432
433 /* Obsolete alias; this flag implies killing suid/sgid only. */
434 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID
435
439 #define FUSE_READ_LOCKOWNER (1 << 1)
440
453 #define FUSE_IOCTL_COMPAT (1 << 0)
454 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
455 #define FUSE_IOCTL_RETRY (1 << 2)
456 #define FUSE_IOCTL_32BIT (1 << 3)
457 #define FUSE_IOCTL_DIR (1 << 4)
458 #define FUSE_IOCTL_COMPAT_X32 (1 << 5)
459
460 #define FUSE_IOCTL_MAX_IOV 256
461
467 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
468
474 #define FUSE_FSYNC_FDATASYNC (1 << 0)
475
482 #define FUSE_ATTR_SUBMOUNT (1 << 0)
483 #define FUSE_ATTR_DAX (1 << 1)
484
489 #define FUSE_OPEN_KILL_SUIDGID (1 << 0)
490
495 #define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0)
496
501 #define FUSE_EXPIRE_ONLY (1 << 0)
502
503 enum fuse_opcode {
504 FUSE_LOOKUP = 1,
505 FUSE_FORGET = 2, /* no reply */
506 FUSE_GETATTR = 3,
507 FUSE_SETATTR = 4,
508 FUSE_READLINK = 5,
509 FUSE_SYMLINK = 6,
510 FUSE_MKNOD = 8,
511 FUSE_MKDIR = 9,
512 FUSE_UNLINK = 10,
513 FUSE_RMDIR = 11,
514 FUSE_RENAME = 12,
515 FUSE_LINK = 13,
516 FUSE_OPEN = 14,
517 FUSE_READ = 15,
518 FUSE_WRITE = 16,
519 FUSE_STATFS = 17,
520 FUSE_RELEASE = 18,
521 FUSE_FSYNC = 20,
522 FUSE_SETXATTR = 21,
523 FUSE_GETXATTR = 22,
524 FUSE_LISTXATTR = 23,
525 FUSE_REMOVEXATTR = 24,
526 FUSE_FLUSH = 25,
527 FUSE_INIT = 26,
528 FUSE_OPENDIR = 27,
529 FUSE_READDIR = 28,
530 FUSE_RELEASEDIR = 29,
531 FUSE_FSYNCDIR = 30,
532 FUSE_GETLK = 31,
533 FUSE_SETLK = 32,
534 FUSE_SETLKW = 33,
535 FUSE_ACCESS = 34,
536 FUSE_CREATE = 35,
537 FUSE_INTERRUPT = 36,
538 FUSE_BMAP = 37,
539 FUSE_DESTROY = 38,
540 FUSE_IOCTL = 39,
541 FUSE_POLL = 40,
542 FUSE_NOTIFY_REPLY = 41,
543 FUSE_BATCH_FORGET = 42,
544 FUSE_FALLOCATE = 43,
545 FUSE_READDIRPLUS = 44,
546 FUSE_RENAME2 = 45,
547 FUSE_LSEEK = 46,
548 FUSE_COPY_FILE_RANGE = 47,
549 FUSE_SETUPMAPPING = 48,
550 FUSE_REMOVEMAPPING = 49,
551 FUSE_SYNCFS = 50,
552 FUSE_TMPFILE = 51,
553
554 /* CUSE specific operations */
555 CUSE_INIT = 4096,
556
557 /* Reserved opcodes: helpful to detect structure endian-ness */
558 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */
559 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */
560 };
561
562 enum fuse_notify_code {
563 FUSE_NOTIFY_POLL = 1,
564 FUSE_NOTIFY_INVAL_INODE = 2,
565 FUSE_NOTIFY_INVAL_ENTRY = 3,
566 FUSE_NOTIFY_STORE = 4,
567 FUSE_NOTIFY_RETRIEVE = 5,
568 FUSE_NOTIFY_DELETE = 6,
569 FUSE_NOTIFY_CODE_MAX,
570 };
571
572 /* The read buffer is required to be at least 8k, but may be much larger */
573 #define FUSE_MIN_READ_BUFFER 8192
574
575 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
576
577 struct fuse_entry_out {
578 uint64_t nodeid; /* Inode ID */
579 uint64_t generation; /* Inode generation: nodeid:gen must
580 be unique for the fs's lifetime */
581 uint64_t entry_valid; /* Cache timeout for the name */
582 uint64_t attr_valid; /* Cache timeout for the attributes */
583 uint32_t entry_valid_nsec;
584 uint32_t attr_valid_nsec;
585 struct fuse_attr attr;
586 };
587
588 struct fuse_forget_in {
589 uint64_t nlookup;
590 };
591
592 struct fuse_forget_one {
593 uint64_t nodeid;
594 uint64_t nlookup;
595 };
596
597 struct fuse_batch_forget_in {
598 uint32_t count;
599 uint32_t dummy;
600 };
601
602 struct fuse_getattr_in {
603 uint32_t getattr_flags;
604 uint32_t dummy;
605 uint64_t fh;
606 };
607
608 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
609
610 struct fuse_attr_out {
611 uint64_t attr_valid; /* Cache timeout for the attributes */
612 uint32_t attr_valid_nsec;
613 uint32_t dummy;
614 struct fuse_attr attr;
615 };
616
617 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
618
619 struct fuse_mknod_in {
620 uint32_t mode;
621 uint32_t rdev;
622 uint32_t umask;
623 uint32_t padding;
624 };
625
626 struct fuse_mkdir_in {
627 uint32_t mode;
628 uint32_t umask;
629 };
630
631 struct fuse_rename_in {
632 uint64_t newdir;
633 };
634
635 struct fuse_rename2_in {
636 uint64_t newdir;
637 uint32_t flags;
638 uint32_t padding;
639 };
640
641 struct fuse_link_in {
642 uint64_t oldnodeid;
643 };
644
645 struct fuse_setattr_in {
646 uint32_t valid;
647 uint32_t padding;
648 uint64_t fh;
649 uint64_t size;
650 uint64_t lock_owner;
651 uint64_t atime;
652 uint64_t mtime;
653 uint64_t ctime;
654 uint32_t atimensec;
655 uint32_t mtimensec;
656 uint32_t ctimensec;
657 uint32_t mode;
658 uint32_t unused4;
659 uint32_t uid;
660 uint32_t gid;
661 uint32_t unused5;
662 };
663
664 struct fuse_open_in {
665 uint32_t flags;
666 uint32_t open_flags; /* FUSE_OPEN_... */
667 };
668
669 struct fuse_create_in {
670 uint32_t flags;
671 uint32_t mode;
672 uint32_t umask;
673 uint32_t open_flags; /* FUSE_OPEN_... */
674 };
675
676 struct fuse_open_out {
677 uint64_t fh;
678 uint32_t open_flags;
679 uint32_t padding;
680 };
681
682 struct fuse_release_in {
683 uint64_t fh;
684 uint32_t flags;
685 uint32_t release_flags;
686 uint64_t lock_owner;
687 };
688
689 struct fuse_flush_in {
690 uint64_t fh;
691 uint32_t unused;
692 uint32_t padding;
693 uint64_t lock_owner;
694 };
695
696 struct fuse_read_in {
697 uint64_t fh;
698 uint64_t offset;
699 uint32_t size;
700 uint32_t read_flags;
701 uint64_t lock_owner;
702 uint32_t flags;
703 uint32_t padding;
704 };
705
706 #define FUSE_COMPAT_WRITE_IN_SIZE 24
707
708 struct fuse_write_in {
709 uint64_t fh;
710 uint64_t offset;
711 uint32_t size;
712 uint32_t write_flags;
713 uint64_t lock_owner;
714 uint32_t flags;
715 uint32_t padding;
716 };
717
718 struct fuse_write_out {
719 uint32_t size;
720 uint32_t padding;
721 };
722
723 #define FUSE_COMPAT_STATFS_SIZE 48
724
725 struct fuse_statfs_out {
726 struct fuse_kstatfs st;
727 };
728
729 struct fuse_fsync_in {
730 uint64_t fh;
731 uint32_t fsync_flags;
732 uint32_t padding;
733 };
734
735 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8
736
737 struct fuse_setxattr_in {
738 uint32_t size;
739 uint32_t flags;
740 uint32_t setxattr_flags;
741 uint32_t padding;
742 };
743
744 struct fuse_getxattr_in {
745 uint32_t size;
746 uint32_t padding;
747 };
748
749 struct fuse_getxattr_out {
750 uint32_t size;
751 uint32_t padding;
752 };
753
754 struct fuse_lk_in {
755 uint64_t fh;
756 uint64_t owner;
757 struct fuse_file_lock lk;
758 uint32_t lk_flags;
759 uint32_t padding;
760 };
761
762 struct fuse_lk_out {
763 struct fuse_file_lock lk;
764 };
765
766 struct fuse_access_in {
767 uint32_t mask;
768 uint32_t padding;
769 };
770
771 struct fuse_init_in {
772 uint32_t major;
773 uint32_t minor;
774 uint32_t max_readahead;
775 uint32_t flags;
776 uint32_t flags2;
777 uint32_t unused[11];
778 };
779
780 #define FUSE_COMPAT_INIT_OUT_SIZE 8
781 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
782
783 struct fuse_init_out {
784 uint32_t major;
785 uint32_t minor;
786 uint32_t max_readahead;
787 uint32_t flags;
788 uint16_t max_background;
789 uint16_t congestion_threshold;
790 uint32_t max_write;
791 uint32_t time_gran;
792 uint16_t max_pages;
793 uint16_t map_alignment;
794 uint32_t flags2;
795 uint32_t unused[7];
796 };
797
798 #define CUSE_INIT_INFO_MAX 4096
799
800 struct cuse_init_in {
801 uint32_t major;
802 uint32_t minor;
803 uint32_t unused;
804 uint32_t flags;
805 };
806
807 struct cuse_init_out {
808 uint32_t major;
809 uint32_t minor;
810 uint32_t unused;
811 uint32_t flags;
812 uint32_t max_read;
813 uint32_t max_write;
814 uint32_t dev_major; /* chardev major */
815 uint32_t dev_minor; /* chardev minor */
816 uint32_t spare[10];
817 };
818
819 struct fuse_interrupt_in {
820 uint64_t unique;
821 };
822
823 struct fuse_bmap_in {
824 uint64_t block;
825 uint32_t blocksize;
826 uint32_t padding;
827 };
828
829 struct fuse_bmap_out {
830 uint64_t block;
831 };
832
833 struct fuse_ioctl_in {
834 uint64_t fh;
835 uint32_t flags;
836 uint32_t cmd;
837 uint64_t arg;
838 uint32_t in_size;
839 uint32_t out_size;
840 };
841
842 struct fuse_ioctl_iovec {
843 uint64_t base;
844 uint64_t len;
845 };
846
847 struct fuse_ioctl_out {
848 int32_t result;
849 uint32_t flags;
850 uint32_t in_iovs;
851 uint32_t out_iovs;
852 };
853
854 struct fuse_poll_in {
855 uint64_t fh;
856 uint64_t kh;
857 uint32_t flags;
858 uint32_t events;
859 };
860
861 struct fuse_poll_out {
862 uint32_t revents;
863 uint32_t padding;
864 };
865
866 struct fuse_notify_poll_wakeup_out {
867 uint64_t kh;
868 };
869
870 struct fuse_fallocate_in {
871 uint64_t fh;
872 uint64_t offset;
873 uint64_t length;
874 uint32_t mode;
875 uint32_t padding;
876 };
877
878 struct fuse_in_header {
879 uint32_t len;
880 uint32_t opcode;
881 uint64_t unique;
882 uint64_t nodeid;
883 uint32_t uid;
884 uint32_t gid;
885 uint32_t pid;
886 uint32_t padding;
887 };
888
889 struct fuse_out_header {
890 uint32_t len;
891 int32_t error;
892 uint64_t unique;
893 };
894
895 struct fuse_dirent {
896 uint64_t ino;
897 uint64_t off;
898 uint32_t namelen;
899 uint32_t type;
900 char name[];
901 };
902
903 /* Align variable length records to 64bit boundary */
904 #define FUSE_REC_ALIGN(x) \
905 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
906
907 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
908 #define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x)
909 #define FUSE_DIRENT_SIZE(d) \
910 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
911
912 struct fuse_direntplus {
913 struct fuse_entry_out entry_out;
914 struct fuse_dirent dirent;
915 };
916
917 #define FUSE_NAME_OFFSET_DIRENTPLUS \
918 offsetof(struct fuse_direntplus, dirent.name)
919 #define FUSE_DIRENTPLUS_SIZE(d) \
920 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
921
922 struct fuse_notify_inval_inode_out {
923 uint64_t ino;
924 int64_t off;
925 int64_t len;
926 };
927
928 struct fuse_notify_inval_entry_out {
929 uint64_t parent;
930 uint32_t namelen;
931 uint32_t flags;
932 };
933
934 struct fuse_notify_delete_out {
935 uint64_t parent;
936 uint64_t child;
937 uint32_t namelen;
938 uint32_t padding;
939 };
940
941 struct fuse_notify_store_out {
942 uint64_t nodeid;
943 uint64_t offset;
944 uint32_t size;
945 uint32_t padding;
946 };
947
948 struct fuse_notify_retrieve_out {
949 uint64_t notify_unique;
950 uint64_t nodeid;
951 uint64_t offset;
952 uint32_t size;
953 uint32_t padding;
954 };
955
956 /* Matches the size of fuse_write_in */
957 struct fuse_notify_retrieve_in {
958 uint64_t dummy1;
959 uint64_t offset;
960 uint32_t size;
961 uint32_t dummy2;
962 uint64_t dummy3;
963 uint64_t dummy4;
964 };
965
966 /* Device ioctls: */
967 #define FUSE_DEV_IOC_MAGIC 229
968 #define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
969
970 struct fuse_lseek_in {
971 uint64_t fh;
972 uint64_t offset;
973 uint32_t whence;
974 uint32_t padding;
975 };
976
977 struct fuse_lseek_out {
978 uint64_t offset;
979 };
980
981 struct fuse_copy_file_range_in {
982 uint64_t fh_in;
983 uint64_t off_in;
984 uint64_t nodeid_out;
985 uint64_t fh_out;
986 uint64_t off_out;
987 uint64_t len;
988 uint64_t flags;
989 };
990
991 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
992 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
993 struct fuse_setupmapping_in {
994 /* An already open handle */
995 uint64_t fh;
996 /* Offset into the file to start the mapping */
997 uint64_t foffset;
998 /* Length of mapping required */
999 uint64_t len;
1000 /* Flags, FUSE_SETUPMAPPING_FLAG_* */
1001 uint64_t flags;
1002 /* Offset in Memory Window */
1003 uint64_t moffset;
1004 };
1005
1006 struct fuse_removemapping_in {
1007 /* number of fuse_removemapping_one follows */
1008 uint32_t count;
1009 };
1010
1011 struct fuse_removemapping_one {
1012 /* Offset into the dax window start the unmapping */
1013 uint64_t moffset;
1014 /* Length of mapping required */
1015 uint64_t len;
1016 };
1017
1018 #define FUSE_REMOVEMAPPING_MAX_ENTRY \
1019 (PAGE_SIZE / sizeof(struct fuse_removemapping_one))
1020
1021 struct fuse_syncfs_in {
1022 uint64_t padding;
1023 };
1024
1025 /*
1026 * For each security context, send fuse_secctx with size of security context
1027 * fuse_secctx will be followed by security context name and this in turn
1028 * will be followed by actual context label.
1029 * fuse_secctx, name, context
1030 */
1031 struct fuse_secctx {
1032 uint32_t size;
1033 uint32_t padding;
1034 };
1035
1036 /*
1037 * Contains the information about how many fuse_secctx structures are being
1038 * sent and what's the total size of all security contexts (including
1039 * size of fuse_secctx_header).
1040 *
1041 */
1042 struct fuse_secctx_header {
1043 uint32_t size;
1044 uint32_t nr_secctx;
1045 };
1046
1047 #endif /* _LINUX_FUSE_H */