1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
3 This file defines the kernel interface of FUSE
4 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
6 This program can be distributed under the terms of the GNU GPL.
9 This -- and only this -- header file may also be distributed under
10 the terms of the BSD Licence as follows:
12 Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
14 Redistribution and use in source and binary forms, with or without
15 modification, are permitted provided that the following conditions
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.
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
37 * This file defines the kernel interface of FUSE
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,
48 * - add padding to messages to accommodate 32-bit servers on 64-bit kernels
51 * - add FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE flags
52 * - add FUSE_FSYNCDIR message
55 * - add FUSE_ACCESS message
56 * - add FUSE_CREATE message
57 * - add filehandle to fuse_setattr_in
60 * - add frsize to fuse_kstatfs
61 * - clean up request size limit checking
64 * - add flags and max_write to fuse_init_out
67 * - add max_readahead to fuse_init_in and fuse_init_out
70 * - add FUSE_INTERRUPT message
71 * - add POSIX file lock support
74 * - add lock_owner and flags fields to fuse_release_in
75 * - add FUSE_BMAP message
76 * - add FUSE_DESTROY message
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
87 * - add nonseekable open flag
91 * - add unsolicited notification support
92 * - add POLL message and NOTIFY_POLL notification
95 * - add umask flag to input argument of create, mknod and mkdir
96 * - add notification messages for invalidation of inodes and
100 * - make max number of background requests and congestion threshold
104 * - add splice support to fuse device
108 * - add retrieve notify
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
117 * - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
120 * - add FUSE_IOCTL_DIR flag
121 * - add FUSE_NOTIFY_DELETE
124 * - add FUSE_FALLOCATE
127 * - add FUSE_AUTO_INVAL_DATA
130 * - add FUSE_READDIRPLUS
131 * - send the requested events in POLL request
134 * - add FUSE_ASYNC_DIO
137 * - add FUSE_WRITEBACK_CACHE
138 * - add time_gran to fuse_init_out
139 * - add reserved space to fuse_init_out
141 * - add ctime and ctimensec to fuse_setattr_in
142 * - add FUSE_RENAME2 request
143 * - add FUSE_NO_OPEN_SUPPORT flag
146 * - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
149 * - add FUSE_PARALLEL_DIROPS
152 * - add FUSE_HANDLE_KILLPRIV
153 * - add FUSE_POSIX_ACL
156 * - add FUSE_ABORT_ERROR
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
165 * - add FUSE_NO_OPENDIR_SUPPORT flag
168 * - add FUSE_EXPLICIT_INVAL_DATA
169 * - add FUSE_IOCTL_COMPAT_X32
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
177 * - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS
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
189 * - add FOPEN_NOFLUSH
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
202 * - add FUSE_EXPIRE_ONLY flag to fuse_notify_inval_entry
203 * - add FOPEN_PARALLEL_DIRECT_WRITES
204 * - add total_extlen to fuse_in_header
205 * - add FUSE_MAX_NR_SECCTX
206 * - add extension header
207 * - add FUSE_EXT_GROUPS
208 * - add FUSE_CREATE_SUPP_GROUP
209 * - add FUSE_HAS_EXPIRE_ONLY
212 * - add FUSE_DIRECT_IO_ALLOW_MMAP
213 * - add FUSE_STATX and related structures
216 * - add max_stack_depth to fuse_init_out, add FUSE_PASSTHROUGH init flag
217 * - add backing_id to fuse_open_out, add FOPEN_PASSTHROUGH open flag
220 #ifndef _LINUX_FUSE_H
221 #define _LINUX_FUSE_H
224 #include <linux/types.h>
230 * Version negotiation:
232 * Both the kernel and userspace send the version they support in the
233 * INIT request and reply respectively.
235 * If the major versions match then both shall use the smallest
236 * of the two minor versions for communication.
238 * If the kernel supports a larger major version, then userspace shall
239 * reply with the major version it supports, ignore the rest of the
240 * INIT message and expect a new INIT message from the kernel with a
241 * matching major version.
243 * If the library supports a larger major version, then it shall fall
244 * back to the major protocol version sent by the kernel for
245 * communication and reply with that major version (and an arbitrary
246 * supported minor version).
249 /** Version number of this interface */
250 #define FUSE_KERNEL_VERSION 7
252 /** Minor version number of this interface */
253 #define FUSE_KERNEL_MINOR_VERSION 40
255 /** The node ID of the root inode */
256 #define FUSE_ROOT_ID 1
258 /* Make sure all structures are padded to 64bit boundary, so 32bit
259 userspace works under 64bit kernels */
281 * The following structures are bit-for-bit compatible with the statx(2) ABI in
284 struct fuse_sx_time
{
298 uint16_t __spare0
[1];
302 uint64_t attributes_mask
;
303 struct fuse_sx_time atime
;
304 struct fuse_sx_time btime
;
305 struct fuse_sx_time ctime
;
306 struct fuse_sx_time mtime
;
311 uint64_t __spare2
[14];
314 struct fuse_kstatfs
{
327 struct fuse_file_lock
{
331 uint32_t pid
; /* tgid */
335 * Bitmasks for fuse_setattr_in.valid
337 #define FATTR_MODE (1 << 0)
338 #define FATTR_UID (1 << 1)
339 #define FATTR_GID (1 << 2)
340 #define FATTR_SIZE (1 << 3)
341 #define FATTR_ATIME (1 << 4)
342 #define FATTR_MTIME (1 << 5)
343 #define FATTR_FH (1 << 6)
344 #define FATTR_ATIME_NOW (1 << 7)
345 #define FATTR_MTIME_NOW (1 << 8)
346 #define FATTR_LOCKOWNER (1 << 9)
347 #define FATTR_CTIME (1 << 10)
348 #define FATTR_KILL_SUIDGID (1 << 11)
351 * Flags returned by the OPEN request
353 * FOPEN_DIRECT_IO: bypass page cache for this open file
354 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
355 * FOPEN_NONSEEKABLE: the file is not seekable
356 * FOPEN_CACHE_DIR: allow caching this directory
357 * FOPEN_STREAM: the file is stream-like (no file position at all)
358 * FOPEN_NOFLUSH: don't flush data cache on close (unless FUSE_WRITEBACK_CACHE)
359 * FOPEN_PARALLEL_DIRECT_WRITES: Allow concurrent direct writes on the same inode
360 * FOPEN_PASSTHROUGH: passthrough read/write io for this open file
362 #define FOPEN_DIRECT_IO (1 << 0)
363 #define FOPEN_KEEP_CACHE (1 << 1)
364 #define FOPEN_NONSEEKABLE (1 << 2)
365 #define FOPEN_CACHE_DIR (1 << 3)
366 #define FOPEN_STREAM (1 << 4)
367 #define FOPEN_NOFLUSH (1 << 5)
368 #define FOPEN_PARALLEL_DIRECT_WRITES (1 << 6)
369 #define FOPEN_PASSTHROUGH (1 << 7)
372 * INIT request/reply flags
374 * FUSE_ASYNC_READ: asynchronous read requests
375 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
376 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
377 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
378 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
379 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
380 * FUSE_DONT_MASK: don't apply umask to file mode on create operations
381 * FUSE_SPLICE_WRITE: kernel supports splice write on the device
382 * FUSE_SPLICE_MOVE: kernel supports splice move on the device
383 * FUSE_SPLICE_READ: kernel supports splice read on the device
384 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
385 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
386 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
387 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
388 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
389 * FUSE_ASYNC_DIO: asynchronous direct I/O submission
390 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
391 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
392 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
393 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
394 * FUSE_POSIX_ACL: filesystem supports posix acls
395 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
396 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
397 * FUSE_CACHE_SYMLINKS: cache READLINK responses
398 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
399 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
400 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for
401 * foffset and moffset fields in struct
402 * fuse_setupmapping_out and fuse_removemapping_one.
403 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts
404 * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc.
405 * Upon write/truncate suid/sgid is only killed if caller
406 * does not have CAP_FSETID. Additionally upon
407 * write/truncate sgid is killed only if file has group
408 * execute permission. (Same as Linux VFS behavior).
409 * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in
410 * FUSE_INIT_EXT: extended fuse_init_in request
411 * FUSE_INIT_RESERVED: reserved, do not use
412 * FUSE_SECURITY_CTX: add security context to create, mkdir, symlink, and
414 * FUSE_HAS_INODE_DAX: use per inode DAX
415 * FUSE_CREATE_SUPP_GROUP: add supplementary group info to create, mkdir,
416 * symlink and mknod (single group that matches parent)
417 * FUSE_HAS_EXPIRE_ONLY: kernel supports expiry-only entry invalidation
418 * FUSE_DIRECT_IO_ALLOW_MMAP: allow shared mmap in FOPEN_DIRECT_IO mode.
420 #define FUSE_ASYNC_READ (1 << 0)
421 #define FUSE_POSIX_LOCKS (1 << 1)
422 #define FUSE_FILE_OPS (1 << 2)
423 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
424 #define FUSE_EXPORT_SUPPORT (1 << 4)
425 #define FUSE_BIG_WRITES (1 << 5)
426 #define FUSE_DONT_MASK (1 << 6)
427 #define FUSE_SPLICE_WRITE (1 << 7)
428 #define FUSE_SPLICE_MOVE (1 << 8)
429 #define FUSE_SPLICE_READ (1 << 9)
430 #define FUSE_FLOCK_LOCKS (1 << 10)
431 #define FUSE_HAS_IOCTL_DIR (1 << 11)
432 #define FUSE_AUTO_INVAL_DATA (1 << 12)
433 #define FUSE_DO_READDIRPLUS (1 << 13)
434 #define FUSE_READDIRPLUS_AUTO (1 << 14)
435 #define FUSE_ASYNC_DIO (1 << 15)
436 #define FUSE_WRITEBACK_CACHE (1 << 16)
437 #define FUSE_NO_OPEN_SUPPORT (1 << 17)
438 #define FUSE_PARALLEL_DIROPS (1 << 18)
439 #define FUSE_HANDLE_KILLPRIV (1 << 19)
440 #define FUSE_POSIX_ACL (1 << 20)
441 #define FUSE_ABORT_ERROR (1 << 21)
442 #define FUSE_MAX_PAGES (1 << 22)
443 #define FUSE_CACHE_SYMLINKS (1 << 23)
444 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
445 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
446 #define FUSE_MAP_ALIGNMENT (1 << 26)
447 #define FUSE_SUBMOUNTS (1 << 27)
448 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
449 #define FUSE_SETXATTR_EXT (1 << 29)
450 #define FUSE_INIT_EXT (1 << 30)
451 #define FUSE_INIT_RESERVED (1 << 31)
452 /* bits 32..63 get shifted down 32 bits into the flags2 field */
453 #define FUSE_SECURITY_CTX (1ULL << 32)
454 #define FUSE_HAS_INODE_DAX (1ULL << 33)
455 #define FUSE_CREATE_SUPP_GROUP (1ULL << 34)
456 #define FUSE_HAS_EXPIRE_ONLY (1ULL << 35)
457 #define FUSE_DIRECT_IO_ALLOW_MMAP (1ULL << 36)
458 #define FUSE_PASSTHROUGH (1ULL << 37)
460 /* Obsolete alias for FUSE_DIRECT_IO_ALLOW_MMAP */
461 #define FUSE_DIRECT_IO_RELAX FUSE_DIRECT_IO_ALLOW_MMAP
464 * CUSE INIT request/reply flags
466 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl
468 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
473 #define FUSE_RELEASE_FLUSH (1 << 0)
474 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1)
479 #define FUSE_GETATTR_FH (1 << 0)
484 #define FUSE_LK_FLOCK (1 << 0)
489 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
490 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
491 * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits
493 #define FUSE_WRITE_CACHE (1 << 0)
494 #define FUSE_WRITE_LOCKOWNER (1 << 1)
495 #define FUSE_WRITE_KILL_SUIDGID (1 << 2)
497 /* Obsolete alias; this flag implies killing suid/sgid only. */
498 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID
503 #define FUSE_READ_LOCKOWNER (1 << 1)
508 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
509 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
510 * FUSE_IOCTL_RETRY: retry with new iovecs
511 * FUSE_IOCTL_32BIT: 32bit ioctl
512 * FUSE_IOCTL_DIR: is a directory
513 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
515 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
517 #define FUSE_IOCTL_COMPAT (1 << 0)
518 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
519 #define FUSE_IOCTL_RETRY (1 << 2)
520 #define FUSE_IOCTL_32BIT (1 << 3)
521 #define FUSE_IOCTL_DIR (1 << 4)
522 #define FUSE_IOCTL_COMPAT_X32 (1 << 5)
524 #define FUSE_IOCTL_MAX_IOV 256
529 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
531 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
536 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
538 #define FUSE_FSYNC_FDATASYNC (1 << 0)
543 * FUSE_ATTR_SUBMOUNT: Object is a submount root
544 * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode
546 #define FUSE_ATTR_SUBMOUNT (1 << 0)
547 #define FUSE_ATTR_DAX (1 << 1)
551 * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable
553 #define FUSE_OPEN_KILL_SUIDGID (1 << 0)
557 * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set
559 #define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0)
562 * notify_inval_entry flags
565 #define FUSE_EXPIRE_ONLY (1 << 0)
569 * FUSE_MAX_NR_SECCTX: maximum value of &fuse_secctx_header.nr_secctx
570 * FUSE_EXT_GROUPS: &fuse_supp_groups extension
573 /* Types 0..31 are reserved for fuse_secctx_header */
574 FUSE_MAX_NR_SECCTX
= 31,
575 FUSE_EXT_GROUPS
= 32,
580 FUSE_FORGET
= 2, /* no reply */
600 FUSE_REMOVEXATTR
= 24,
605 FUSE_RELEASEDIR
= 29,
617 FUSE_NOTIFY_REPLY
= 41,
618 FUSE_BATCH_FORGET
= 42,
620 FUSE_READDIRPLUS
= 44,
623 FUSE_COPY_FILE_RANGE
= 47,
624 FUSE_SETUPMAPPING
= 48,
625 FUSE_REMOVEMAPPING
= 49,
630 /* CUSE specific operations */
633 /* Reserved opcodes: helpful to detect structure endian-ness */
634 CUSE_INIT_BSWAP_RESERVED
= 1048576, /* CUSE_INIT << 8 */
635 FUSE_INIT_BSWAP_RESERVED
= 436207616, /* FUSE_INIT << 24 */
638 enum fuse_notify_code
{
639 FUSE_NOTIFY_POLL
= 1,
640 FUSE_NOTIFY_INVAL_INODE
= 2,
641 FUSE_NOTIFY_INVAL_ENTRY
= 3,
642 FUSE_NOTIFY_STORE
= 4,
643 FUSE_NOTIFY_RETRIEVE
= 5,
644 FUSE_NOTIFY_DELETE
= 6,
645 FUSE_NOTIFY_CODE_MAX
,
648 /* The read buffer is required to be at least 8k, but may be much larger */
649 #define FUSE_MIN_READ_BUFFER 8192
651 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
653 struct fuse_entry_out
{
654 uint64_t nodeid
; /* Inode ID */
655 uint64_t generation
; /* Inode generation: nodeid:gen must
656 be unique for the fs's lifetime */
657 uint64_t entry_valid
; /* Cache timeout for the name */
658 uint64_t attr_valid
; /* Cache timeout for the attributes */
659 uint32_t entry_valid_nsec
;
660 uint32_t attr_valid_nsec
;
661 struct fuse_attr attr
;
664 struct fuse_forget_in
{
668 struct fuse_forget_one
{
673 struct fuse_batch_forget_in
{
678 struct fuse_getattr_in
{
679 uint32_t getattr_flags
;
684 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
686 struct fuse_attr_out
{
687 uint64_t attr_valid
; /* Cache timeout for the attributes */
688 uint32_t attr_valid_nsec
;
690 struct fuse_attr attr
;
693 struct fuse_statx_in
{
694 uint32_t getattr_flags
;
701 struct fuse_statx_out
{
702 uint64_t attr_valid
; /* Cache timeout for the attributes */
703 uint32_t attr_valid_nsec
;
706 struct fuse_statx stat
;
709 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
711 struct fuse_mknod_in
{
718 struct fuse_mkdir_in
{
723 struct fuse_rename_in
{
727 struct fuse_rename2_in
{
733 struct fuse_link_in
{
737 struct fuse_setattr_in
{
756 struct fuse_open_in
{
758 uint32_t open_flags
; /* FUSE_OPEN_... */
761 struct fuse_create_in
{
765 uint32_t open_flags
; /* FUSE_OPEN_... */
768 struct fuse_open_out
{
774 struct fuse_release_in
{
777 uint32_t release_flags
;
781 struct fuse_flush_in
{
788 struct fuse_read_in
{
798 #define FUSE_COMPAT_WRITE_IN_SIZE 24
800 struct fuse_write_in
{
804 uint32_t write_flags
;
810 struct fuse_write_out
{
815 #define FUSE_COMPAT_STATFS_SIZE 48
817 struct fuse_statfs_out
{
818 struct fuse_kstatfs st
;
821 struct fuse_fsync_in
{
823 uint32_t fsync_flags
;
827 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8
829 struct fuse_setxattr_in
{
832 uint32_t setxattr_flags
;
836 struct fuse_getxattr_in
{
841 struct fuse_getxattr_out
{
849 struct fuse_file_lock lk
;
855 struct fuse_file_lock lk
;
858 struct fuse_access_in
{
863 struct fuse_init_in
{
866 uint32_t max_readahead
;
872 #define FUSE_COMPAT_INIT_OUT_SIZE 8
873 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
875 struct fuse_init_out
{
878 uint32_t max_readahead
;
880 uint16_t max_background
;
881 uint16_t congestion_threshold
;
885 uint16_t map_alignment
;
887 uint32_t max_stack_depth
;
891 #define CUSE_INIT_INFO_MAX 4096
893 struct cuse_init_in
{
900 struct cuse_init_out
{
907 uint32_t dev_major
; /* chardev major */
908 uint32_t dev_minor
; /* chardev minor */
912 struct fuse_interrupt_in
{
916 struct fuse_bmap_in
{
922 struct fuse_bmap_out
{
926 struct fuse_ioctl_in
{
935 struct fuse_ioctl_iovec
{
940 struct fuse_ioctl_out
{
947 struct fuse_poll_in
{
954 struct fuse_poll_out
{
959 struct fuse_notify_poll_wakeup_out
{
963 struct fuse_fallocate_in
{
971 struct fuse_in_header
{
979 uint16_t total_extlen
; /* length of extensions in 8byte units */
983 struct fuse_out_header
{
997 /* Align variable length records to 64bit boundary */
998 #define FUSE_REC_ALIGN(x) \
999 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
1001 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
1002 #define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x)
1003 #define FUSE_DIRENT_SIZE(d) \
1004 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
1006 struct fuse_direntplus
{
1007 struct fuse_entry_out entry_out
;
1008 struct fuse_dirent dirent
;
1011 #define FUSE_NAME_OFFSET_DIRENTPLUS \
1012 offsetof(struct fuse_direntplus, dirent.name)
1013 #define FUSE_DIRENTPLUS_SIZE(d) \
1014 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
1016 struct fuse_notify_inval_inode_out
{
1022 struct fuse_notify_inval_entry_out
{
1028 struct fuse_notify_delete_out
{
1035 struct fuse_notify_store_out
{
1042 struct fuse_notify_retrieve_out
{
1043 uint64_t notify_unique
;
1050 /* Matches the size of fuse_write_in */
1051 struct fuse_notify_retrieve_in
{
1060 /* Device ioctls: */
1061 #define FUSE_DEV_IOC_MAGIC 229
1062 #define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
1064 struct fuse_lseek_in
{
1071 struct fuse_lseek_out
{
1075 struct fuse_copy_file_range_in
{
1078 uint64_t nodeid_out
;
1085 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
1086 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
1087 struct fuse_setupmapping_in
{
1088 /* An already open handle */
1090 /* Offset into the file to start the mapping */
1092 /* Length of mapping required */
1094 /* Flags, FUSE_SETUPMAPPING_FLAG_* */
1096 /* Offset in Memory Window */
1100 struct fuse_removemapping_in
{
1101 /* number of fuse_removemapping_one follows */
1105 struct fuse_removemapping_one
{
1106 /* Offset into the dax window start the unmapping */
1108 /* Length of mapping required */
1112 #define FUSE_REMOVEMAPPING_MAX_ENTRY \
1113 (PAGE_SIZE / sizeof(struct fuse_removemapping_one))
1115 struct fuse_syncfs_in
{
1120 * For each security context, send fuse_secctx with size of security context
1121 * fuse_secctx will be followed by security context name and this in turn
1122 * will be followed by actual context label.
1123 * fuse_secctx, name, context
1125 struct fuse_secctx
{
1131 * Contains the information about how many fuse_secctx structures are being
1132 * sent and what's the total size of all security contexts (including
1133 * size of fuse_secctx_header).
1136 struct fuse_secctx_header
{
1142 * struct fuse_ext_header - extension header
1143 * @size: total size of this extension including this header
1144 * @type: type of extension
1146 * This is made compatible with fuse_secctx_header by using type values >
1147 * FUSE_MAX_NR_SECCTX
1149 struct fuse_ext_header
{
1155 * struct fuse_supp_groups - Supplementary group extension
1156 * @nr_groups: number of supplementary groups
1157 * @groups: flexible array of group IDs
1159 struct fuse_supp_groups
{
1164 #endif /* _LINUX_FUSE_H */