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  * 7.9:
42  * - new fuse_getattr_in input argument of GETATTR
43  * - add lk_flags in fuse_lk_in
44  * - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
45  * - add blksize field to fuse_attr
46  * - add file flags field to fuse_read_in and fuse_write_in
47  * - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
48  *
49  * 7.10
50  * - add nonseekable open flag
51  *
52  * 7.11
53  * - add IOCTL message
54  * - add unsolicited notification support
55  * - add POLL message and NOTIFY_POLL notification
56  *
57  * 7.12
58  * - add umask flag to input argument of create, mknod and mkdir
59  * - add notification messages for invalidation of inodes and
60  * directory entries
61  *
62  * 7.13
63  * - make max number of background requests and congestion threshold
64  * tunables
65  *
66  * 7.14
67  * - add splice support to fuse device
68  *
69  * 7.15
70  * - add store notify
71  * - add retrieve notify
72  *
73  * 7.16
74  * - add BATCH_FORGET request
75  * - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
76  * fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
77  * - add FUSE_IOCTL_32BIT flag
78  *
79  * 7.17
80  * - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
81  *
82  * 7.18
83  * - add FUSE_IOCTL_DIR flag
84  * - add FUSE_NOTIFY_DELETE
85  *
86  * 7.19
87  * - add FUSE_FALLOCATE
88  *
89  * 7.20
90  * - add FUSE_AUTO_INVAL_DATA
91  *
92  * 7.21
93  * - add FUSE_READDIRPLUS
94  * - send the requested events in POLL request
95  *
96  * 7.22
97  * - add FUSE_ASYNC_DIO
98  *
99  * 7.23
100  * - add FUSE_WRITEBACK_CACHE
101  * - add time_gran to fuse_init_out
102  * - add reserved space to fuse_init_out
103  * - add FATTR_CTIME
104  * - add ctime and ctimensec to fuse_setattr_in
105  * - add FUSE_RENAME2 request
106  * - add FUSE_NO_OPEN_SUPPORT flag
107  *
108  * 7.24
109  * - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
110  *
111  * 7.25
112  * - add FUSE_PARALLEL_DIROPS
113  *
114  * 7.26
115  * - add FUSE_HANDLE_KILLPRIV
116  * - add FUSE_POSIX_ACL
117  *
118  * 7.27
119  * - add FUSE_ABORT_ERROR
120  *
121  * 7.28
122  * - add FUSE_COPY_FILE_RANGE
123  * - add FOPEN_CACHE_DIR
124  * - add FUSE_MAX_PAGES, add max_pages to init_out
125  * - add FUSE_CACHE_SYMLINKS
126  *
127  * 7.29
128  * - add FUSE_NO_OPENDIR_SUPPORT flag
129  *
130  * 7.30
131  * - add FUSE_EXPLICIT_INVAL_DATA
132  * - add FUSE_IOCTL_COMPAT_X32
133  *
134  * 7.31
135  * - add FUSE_WRITE_KILL_PRIV flag
136  */
137 
138 #ifndef _LINUX_FUSE_H
139 #define _LINUX_FUSE_H
140 
141 #ifdef __KERNEL__
142 #include <linux/types.h>
143 #else
144 #include <stdint.h>
145 #endif
146 
147 /*
148  * Version negotiation:
149  *
150  * Both the kernel and userspace send the version they support in the
151  * INIT request and reply respectively.
152  *
153  * If the major versions match then both shall use the smallest
154  * of the two minor versions for communication.
155  *
156  * If the kernel supports a larger major version, then userspace shall
157  * reply with the major version it supports, ignore the rest of the
158  * INIT message and expect a new INIT message from the kernel with a
159  * matching major version.
160  *
161  * If the library supports a larger major version, then it shall fall
162  * back to the major protocol version sent by the kernel for
163  * communication and reply with that major version (and an arbitrary
164  * supported minor version).
165  */
166 
168 #define FUSE_KERNEL_VERSION 7
169 
171 #define FUSE_KERNEL_MINOR_VERSION 31
172 
174 #define FUSE_ROOT_ID 1
175 
176 /* Make sure all structures are padded to 64bit boundary, so 32bit
177  userspace works under 64bit kernels */
178 
179 struct fuse_attr {
180  uint64_t ino;
181  uint64_t size;
182  uint64_t blocks;
183  uint64_t atime;
184  uint64_t mtime;
185  uint64_t ctime;
186  uint32_t atimensec;
187  uint32_t mtimensec;
188  uint32_t ctimensec;
189  uint32_t mode;
190  uint32_t nlink;
191  uint32_t uid;
192  uint32_t gid;
193  uint32_t rdev;
194  uint32_t blksize;
195  uint32_t padding;
196 };
197 
198 struct fuse_kstatfs {
199  uint64_t blocks;
200  uint64_t bfree;
201  uint64_t bavail;
202  uint64_t files;
203  uint64_t ffree;
204  uint32_t bsize;
205  uint32_t namelen;
206  uint32_t frsize;
207  uint32_t padding;
208  uint32_t spare[6];
209 };
210 
211 struct fuse_file_lock {
212  uint64_t start;
213  uint64_t end;
214  uint32_t type;
215  uint32_t pid; /* tgid */
216 };
217 
221 #define FATTR_MODE (1 << 0)
222 #define FATTR_UID (1 << 1)
223 #define FATTR_GID (1 << 2)
224 #define FATTR_SIZE (1 << 3)
225 #define FATTR_ATIME (1 << 4)
226 #define FATTR_MTIME (1 << 5)
227 #define FATTR_FH (1 << 6)
228 #define FATTR_ATIME_NOW (1 << 7)
229 #define FATTR_MTIME_NOW (1 << 8)
230 #define FATTR_LOCKOWNER (1 << 9)
231 #define FATTR_CTIME (1 << 10)
232 
242 #define FOPEN_DIRECT_IO (1 << 0)
243 #define FOPEN_KEEP_CACHE (1 << 1)
244 #define FOPEN_NONSEEKABLE (1 << 2)
245 #define FOPEN_CACHE_DIR (1 << 3)
246 #define FOPEN_STREAM (1 << 4)
247 
278 #define FUSE_ASYNC_READ (1 << 0)
279 #define FUSE_POSIX_LOCKS (1 << 1)
280 #define FUSE_FILE_OPS (1 << 2)
281 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
282 #define FUSE_EXPORT_SUPPORT (1 << 4)
283 #define FUSE_BIG_WRITES (1 << 5)
284 #define FUSE_DONT_MASK (1 << 6)
285 #define FUSE_SPLICE_WRITE (1 << 7)
286 #define FUSE_SPLICE_MOVE (1 << 8)
287 #define FUSE_SPLICE_READ (1 << 9)
288 #define FUSE_FLOCK_LOCKS (1 << 10)
289 #define FUSE_HAS_IOCTL_DIR (1 << 11)
290 #define FUSE_AUTO_INVAL_DATA (1 << 12)
291 #define FUSE_DO_READDIRPLUS (1 << 13)
292 #define FUSE_READDIRPLUS_AUTO (1 << 14)
293 #define FUSE_ASYNC_DIO (1 << 15)
294 #define FUSE_WRITEBACK_CACHE (1 << 16)
295 #define FUSE_NO_OPEN_SUPPORT (1 << 17)
296 #define FUSE_PARALLEL_DIROPS (1 << 18)
297 #define FUSE_HANDLE_KILLPRIV (1 << 19)
298 #define FUSE_POSIX_ACL (1 << 20)
299 #define FUSE_ABORT_ERROR (1 << 21)
300 #define FUSE_MAX_PAGES (1 << 22)
301 #define FUSE_CACHE_SYMLINKS (1 << 23)
302 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
303 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
304 
310 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
311 
315 #define FUSE_RELEASE_FLUSH (1 << 0)
316 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1)
317 
321 #define FUSE_GETATTR_FH (1 << 0)
322 
326 #define FUSE_LK_FLOCK (1 << 0)
327 
335 #define FUSE_WRITE_CACHE (1 << 0)
336 #define FUSE_WRITE_LOCKOWNER (1 << 1)
337 #define FUSE_WRITE_KILL_PRIV (1 << 2)
338 
342 #define FUSE_READ_LOCKOWNER (1 << 1)
343 
356 #define FUSE_IOCTL_COMPAT (1 << 0)
357 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
358 #define FUSE_IOCTL_RETRY (1 << 2)
359 #define FUSE_IOCTL_32BIT (1 << 3)
360 #define FUSE_IOCTL_DIR (1 << 4)
361 #define FUSE_IOCTL_COMPAT_X32 (1 << 5)
362 
363 #define FUSE_IOCTL_MAX_IOV 256
364 
370 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
371 
377 #define FUSE_FSYNC_FDATASYNC (1 << 0)
378 
379 enum fuse_opcode {
380  FUSE_LOOKUP = 1,
381  FUSE_FORGET = 2, /* no reply */
382  FUSE_GETATTR = 3,
383  FUSE_SETATTR = 4,
384  FUSE_READLINK = 5,
385  FUSE_SYMLINK = 6,
386  FUSE_MKNOD = 8,
387  FUSE_MKDIR = 9,
388  FUSE_UNLINK = 10,
389  FUSE_RMDIR = 11,
390  FUSE_RENAME = 12,
391  FUSE_LINK = 13,
392  FUSE_OPEN = 14,
393  FUSE_READ = 15,
394  FUSE_WRITE = 16,
395  FUSE_STATFS = 17,
396  FUSE_RELEASE = 18,
397  FUSE_FSYNC = 20,
398  FUSE_SETXATTR = 21,
399  FUSE_GETXATTR = 22,
400  FUSE_LISTXATTR = 23,
401  FUSE_REMOVEXATTR = 24,
402  FUSE_FLUSH = 25,
403  FUSE_INIT = 26,
404  FUSE_OPENDIR = 27,
405  FUSE_READDIR = 28,
406  FUSE_RELEASEDIR = 29,
407  FUSE_FSYNCDIR = 30,
408  FUSE_GETLK = 31,
409  FUSE_SETLK = 32,
410  FUSE_SETLKW = 33,
411  FUSE_ACCESS = 34,
412  FUSE_CREATE = 35,
413  FUSE_INTERRUPT = 36,
414  FUSE_BMAP = 37,
415  FUSE_DESTROY = 38,
416  FUSE_IOCTL = 39,
417  FUSE_POLL = 40,
418  FUSE_NOTIFY_REPLY = 41,
419  FUSE_BATCH_FORGET = 42,
420  FUSE_FALLOCATE = 43,
421  FUSE_READDIRPLUS = 44,
422  FUSE_RENAME2 = 45,
423  FUSE_LSEEK = 46,
424  FUSE_COPY_FILE_RANGE = 47,
425 
426  /* CUSE specific operations */
427  CUSE_INIT = 4096,
428 };
429 
430 enum fuse_notify_code {
431  FUSE_NOTIFY_POLL = 1,
432  FUSE_NOTIFY_INVAL_INODE = 2,
433  FUSE_NOTIFY_INVAL_ENTRY = 3,
434  FUSE_NOTIFY_STORE = 4,
435  FUSE_NOTIFY_RETRIEVE = 5,
436  FUSE_NOTIFY_DELETE = 6,
437  FUSE_NOTIFY_CODE_MAX,
438 };
439 
440 /* The read buffer is required to be at least 8k, but may be much larger */
441 #define FUSE_MIN_READ_BUFFER 8192
442 
443 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
444 
445 struct fuse_entry_out {
446  uint64_t nodeid; /* Inode ID */
447  uint64_t generation; /* Inode generation: nodeid:gen must
448  be unique for the fs's lifetime */
449  uint64_t entry_valid; /* Cache timeout for the name */
450  uint64_t attr_valid; /* Cache timeout for the attributes */
451  uint32_t entry_valid_nsec;
452  uint32_t attr_valid_nsec;
453  struct fuse_attr attr;
454 };
455 
456 struct fuse_forget_in {
457  uint64_t nlookup;
458 };
459 
460 struct fuse_forget_one {
461  uint64_t nodeid;
462  uint64_t nlookup;
463 };
464 
465 struct fuse_batch_forget_in {
466  uint32_t count;
467  uint32_t dummy;
468 };
469 
470 struct fuse_getattr_in {
471  uint32_t getattr_flags;
472  uint32_t dummy;
473  uint64_t fh;
474 };
475 
476 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
477 
478 struct fuse_attr_out {
479  uint64_t attr_valid; /* Cache timeout for the attributes */
480  uint32_t attr_valid_nsec;
481  uint32_t dummy;
482  struct fuse_attr attr;
483 };
484 
485 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
486 
487 struct fuse_mknod_in {
488  uint32_t mode;
489  uint32_t rdev;
490  uint32_t umask;
491  uint32_t padding;
492 };
493 
494 struct fuse_mkdir_in {
495  uint32_t mode;
496  uint32_t umask;
497 };
498 
499 struct fuse_rename_in {
500  uint64_t newdir;
501 };
502 
503 struct fuse_rename2_in {
504  uint64_t newdir;
505  uint32_t flags;
506  uint32_t padding;
507 };
508 
509 struct fuse_link_in {
510  uint64_t oldnodeid;
511 };
512 
513 struct fuse_setattr_in {
514  uint32_t valid;
515  uint32_t padding;
516  uint64_t fh;
517  uint64_t size;
518  uint64_t lock_owner;
519  uint64_t atime;
520  uint64_t mtime;
521  uint64_t ctime;
522  uint32_t atimensec;
523  uint32_t mtimensec;
524  uint32_t ctimensec;
525  uint32_t mode;
526  uint32_t unused4;
527  uint32_t uid;
528  uint32_t gid;
529  uint32_t unused5;
530 };
531 
532 struct fuse_open_in {
533  uint32_t flags;
534  uint32_t unused;
535 };
536 
537 struct fuse_create_in {
538  uint32_t flags;
539  uint32_t mode;
540  uint32_t umask;
541  uint32_t padding;
542 };
543 
544 struct fuse_open_out {
545  uint64_t fh;
546  uint32_t open_flags;
547  uint32_t padding;
548 };
549 
550 struct fuse_release_in {
551  uint64_t fh;
552  uint32_t flags;
553  uint32_t release_flags;
554  uint64_t lock_owner;
555 };
556 
557 struct fuse_flush_in {
558  uint64_t fh;
559  uint32_t unused;
560  uint32_t padding;
561  uint64_t lock_owner;
562 };
563 
564 struct fuse_read_in {
565  uint64_t fh;
566  uint64_t offset;
567  uint32_t size;
568  uint32_t read_flags;
569  uint64_t lock_owner;
570  uint32_t flags;
571  uint32_t padding;
572 };
573 
574 #define FUSE_COMPAT_WRITE_IN_SIZE 24
575 
576 struct fuse_write_in {
577  uint64_t fh;
578  uint64_t offset;
579  uint32_t size;
580  uint32_t write_flags;
581  uint64_t lock_owner;
582  uint32_t flags;
583  uint32_t padding;
584 };
585 
586 struct fuse_write_out {
587  uint32_t size;
588  uint32_t padding;
589 };
590 
591 #define FUSE_COMPAT_STATFS_SIZE 48
592 
593 struct fuse_statfs_out {
594  struct fuse_kstatfs st;
595 };
596 
597 struct fuse_fsync_in {
598  uint64_t fh;
599  uint32_t fsync_flags;
600  uint32_t padding;
601 };
602 
603 struct fuse_setxattr_in {
604  uint32_t size;
605  uint32_t flags;
606 };
607 
608 struct fuse_getxattr_in {
609  uint32_t size;
610  uint32_t padding;
611 };
612 
613 struct fuse_getxattr_out {
614  uint32_t size;
615  uint32_t padding;
616 };
617 
618 struct fuse_lk_in {
619  uint64_t fh;
620  uint64_t owner;
621  struct fuse_file_lock lk;
622  uint32_t lk_flags;
623  uint32_t padding;
624 };
625 
626 struct fuse_lk_out {
627  struct fuse_file_lock lk;
628 };
629 
630 struct fuse_access_in {
631  uint32_t mask;
632  uint32_t padding;
633 };
634 
635 struct fuse_init_in {
636  uint32_t major;
637  uint32_t minor;
638  uint32_t max_readahead;
639  uint32_t flags;
640 };
641 
642 #define FUSE_COMPAT_INIT_OUT_SIZE 8
643 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
644 
645 struct fuse_init_out {
646  uint32_t major;
647  uint32_t minor;
648  uint32_t max_readahead;
649  uint32_t flags;
650  uint16_t max_background;
651  uint16_t congestion_threshold;
652  uint32_t max_write;
653  uint32_t time_gran;
654  uint16_t max_pages;
655  uint16_t padding;
656  uint32_t unused[8];
657 };
658 
659 #define CUSE_INIT_INFO_MAX 4096
660 
661 struct cuse_init_in {
662  uint32_t major;
663  uint32_t minor;
664  uint32_t unused;
665  uint32_t flags;
666 };
667 
668 struct cuse_init_out {
669  uint32_t major;
670  uint32_t minor;
671  uint32_t unused;
672  uint32_t flags;
673  uint32_t max_read;
674  uint32_t max_write;
675  uint32_t dev_major; /* chardev major */
676  uint32_t dev_minor; /* chardev minor */
677  uint32_t spare[10];
678 };
679 
680 struct fuse_interrupt_in {
681  uint64_t unique;
682 };
683 
684 struct fuse_bmap_in {
685  uint64_t block;
686  uint32_t blocksize;
687  uint32_t padding;
688 };
689 
690 struct fuse_bmap_out {
691  uint64_t block;
692 };
693 
694 struct fuse_ioctl_in {
695  uint64_t fh;
696  uint32_t flags;
697  uint32_t cmd;
698  uint64_t arg;
699  uint32_t in_size;
700  uint32_t out_size;
701 };
702 
703 struct fuse_ioctl_iovec {
704  uint64_t base;
705  uint64_t len;
706 };
707 
708 struct fuse_ioctl_out {
709  int32_t result;
710  uint32_t flags;
711  uint32_t in_iovs;
712  uint32_t out_iovs;
713 };
714 
715 struct fuse_poll_in {
716  uint64_t fh;
717  uint64_t kh;
718  uint32_t flags;
719  uint32_t events;
720 };
721 
722 struct fuse_poll_out {
723  uint32_t revents;
724  uint32_t padding;
725 };
726 
727 struct fuse_notify_poll_wakeup_out {
728  uint64_t kh;
729 };
730 
731 struct fuse_fallocate_in {
732  uint64_t fh;
733  uint64_t offset;
734  uint64_t length;
735  uint32_t mode;
736  uint32_t padding;
737 };
738 
739 struct fuse_in_header {
740  uint32_t len;
741  uint32_t opcode;
742  uint64_t unique;
743  uint64_t nodeid;
744  uint32_t uid;
745  uint32_t gid;
746  uint32_t pid;
747  uint32_t padding;
748 };
749 
750 struct fuse_out_header {
751  uint32_t len;
752  int32_t error;
753  uint64_t unique;
754 };
755 
756 struct fuse_dirent {
757  uint64_t ino;
758  uint64_t off;
759  uint32_t namelen;
760  uint32_t type;
761  char name[];
762 };
763 
764 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
765 #define FUSE_DIRENT_ALIGN(x) \
766  (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
767 #define FUSE_DIRENT_SIZE(d) \
768  FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
769 
770 struct fuse_direntplus {
771  struct fuse_entry_out entry_out;
772  struct fuse_dirent dirent;
773 };
774 
775 #define FUSE_NAME_OFFSET_DIRENTPLUS \
776  offsetof(struct fuse_direntplus, dirent.name)
777 #define FUSE_DIRENTPLUS_SIZE(d) \
778  FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
779 
780 struct fuse_notify_inval_inode_out {
781  uint64_t ino;
782  int64_t off;
783  int64_t len;
784 };
785 
786 struct fuse_notify_inval_entry_out {
787  uint64_t parent;
788  uint32_t namelen;
789  uint32_t padding;
790 };
791 
792 struct fuse_notify_delete_out {
793  uint64_t parent;
794  uint64_t child;
795  uint32_t namelen;
796  uint32_t padding;
797 };
798 
799 struct fuse_notify_store_out {
800  uint64_t nodeid;
801  uint64_t offset;
802  uint32_t size;
803  uint32_t padding;
804 };
805 
806 struct fuse_notify_retrieve_out {
807  uint64_t notify_unique;
808  uint64_t nodeid;
809  uint64_t offset;
810  uint32_t size;
811  uint32_t padding;
812 };
813 
814 /* Matches the size of fuse_write_in */
815 struct fuse_notify_retrieve_in {
816  uint64_t dummy1;
817  uint64_t offset;
818  uint32_t size;
819  uint32_t dummy2;
820  uint64_t dummy3;
821  uint64_t dummy4;
822 };
823 
824 /* Device ioctls: */
825 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t)
826 
827 struct fuse_lseek_in {
828  uint64_t fh;
829  uint64_t offset;
830  uint32_t whence;
831  uint32_t padding;
832 };
833 
834 struct fuse_lseek_out {
835  uint64_t offset;
836 };
837 
838 struct fuse_copy_file_range_in {
839  uint64_t fh_in;
840  uint64_t off_in;
841  uint64_t nodeid_out;
842  uint64_t fh_out;
843  uint64_t off_out;
844  uint64_t len;
845  uint64_t flags;
846 };
847 
848 #endif /* _LINUX_FUSE_H */