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 #ifndef _LINUX_FUSE_H
217 #define _LINUX_FUSE_H
220 #include <linux/types.h>
226 * Version negotiation:
228 * Both the kernel and userspace send the version they support in the
229 * INIT request and reply respectively.
231 * If the major versions match then both shall use the smallest
232 * of the two minor versions for communication.
234 * If the kernel supports a larger major version, then userspace shall
235 * reply with the major version it supports, ignore the rest of the
236 * INIT message and expect a new INIT message from the kernel with a
237 * matching major version.
239 * If the library supports a larger major version, then it shall fall
240 * back to the major protocol version sent by the kernel for
241 * communication and reply with that major version (and an arbitrary
242 * supported minor version).
245 /** Version number of this interface */
246 #define FUSE_KERNEL_VERSION 7
248 /** Minor version number of this interface */
249 #define FUSE_KERNEL_MINOR_VERSION 39
251 /** The node ID of the root inode */
252 #define FUSE_ROOT_ID 1
254 /* Make sure all structures are padded to 64bit boundary, so 32bit
255 userspace works under 64bit kernels */
277 * The following structures are bit-for-bit compatible with the statx(2) ABI in
280 struct fuse_sx_time {
294 uint16_t __spare0[1];
298 uint64_t attributes_mask;
299 struct fuse_sx_time atime;
300 struct fuse_sx_time btime;
301 struct fuse_sx_time ctime;
302 struct fuse_sx_time mtime;
307 uint64_t __spare2[14];
310 struct fuse_kstatfs {
323 struct fuse_file_lock {
327 uint32_t pid; /* tgid */
331 * Bitmasks for fuse_setattr_in.valid
333 #define FATTR_MODE (1 << 0)
334 #define FATTR_UID (1 << 1)
335 #define FATTR_GID (1 << 2)
336 #define FATTR_SIZE (1 << 3)
337 #define FATTR_ATIME (1 << 4)
338 #define FATTR_MTIME (1 << 5)
339 #define FATTR_FH (1 << 6)
340 #define FATTR_ATIME_NOW (1 << 7)
341 #define FATTR_MTIME_NOW (1 << 8)
342 #define FATTR_LOCKOWNER (1 << 9)
343 #define FATTR_CTIME (1 << 10)
344 #define FATTR_KILL_SUIDGID (1 << 11)
347 * Flags returned by the OPEN request
349 * FOPEN_DIRECT_IO: bypass page cache for this open file
350 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
351 * FOPEN_NONSEEKABLE: the file is not seekable
352 * FOPEN_CACHE_DIR: allow caching this directory
353 * FOPEN_STREAM: the file is stream-like (no file position at all)
354 * FOPEN_NOFLUSH: don't flush data cache on close (unless FUSE_WRITEBACK_CACHE)
355 * FOPEN_PARALLEL_DIRECT_WRITES: Allow concurrent direct writes on the same inode
357 #define FOPEN_DIRECT_IO (1 << 0)
358 #define FOPEN_KEEP_CACHE (1 << 1)
359 #define FOPEN_NONSEEKABLE (1 << 2)
360 #define FOPEN_CACHE_DIR (1 << 3)
361 #define FOPEN_STREAM (1 << 4)
362 #define FOPEN_NOFLUSH (1 << 5)
363 #define FOPEN_PARALLEL_DIRECT_WRITES (1 << 6)
366 * INIT request/reply flags
368 * FUSE_ASYNC_READ: asynchronous read requests
369 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
370 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
371 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
372 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
373 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
374 * FUSE_DONT_MASK: don't apply umask to file mode on create operations
375 * FUSE_SPLICE_WRITE: kernel supports splice write on the device
376 * FUSE_SPLICE_MOVE: kernel supports splice move on the device
377 * FUSE_SPLICE_READ: kernel supports splice read on the device
378 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
379 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
380 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
381 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
382 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
383 * FUSE_ASYNC_DIO: asynchronous direct I/O submission
384 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
385 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
386 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
387 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
388 * FUSE_POSIX_ACL: filesystem supports posix acls
389 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
390 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
391 * FUSE_CACHE_SYMLINKS: cache READLINK responses
392 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
393 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
394 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for
395 * foffset and moffset fields in struct
396 * fuse_setupmapping_out and fuse_removemapping_one.
397 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts
398 * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc.
399 * Upon write/truncate suid/sgid is only killed if caller
400 * does not have CAP_FSETID. Additionally upon
401 * write/truncate sgid is killed only if file has group
402 * execute permission. (Same as Linux VFS behavior).
403 * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in
404 * FUSE_INIT_EXT: extended fuse_init_in request
405 * FUSE_INIT_RESERVED: reserved, do not use
406 * FUSE_SECURITY_CTX: add security context to create, mkdir, symlink, and
408 * FUSE_HAS_INODE_DAX: use per inode DAX
409 * FUSE_CREATE_SUPP_GROUP: add supplementary group info to create, mkdir,
410 * symlink and mknod (single group that matches parent)
411 * FUSE_HAS_EXPIRE_ONLY: kernel supports expiry-only entry invalidation
412 * FUSE_DIRECT_IO_ALLOW_MMAP: allow shared mmap in FOPEN_DIRECT_IO mode.
414 #define FUSE_ASYNC_READ (1 << 0)
415 #define FUSE_POSIX_LOCKS (1 << 1)
416 #define FUSE_FILE_OPS (1 << 2)
417 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
418 #define FUSE_EXPORT_SUPPORT (1 << 4)
419 #define FUSE_BIG_WRITES (1 << 5)
420 #define FUSE_DONT_MASK (1 << 6)
421 #define FUSE_SPLICE_WRITE (1 << 7)
422 #define FUSE_SPLICE_MOVE (1 << 8)
423 #define FUSE_SPLICE_READ (1 << 9)
424 #define FUSE_FLOCK_LOCKS (1 << 10)
425 #define FUSE_HAS_IOCTL_DIR (1 << 11)
426 #define FUSE_AUTO_INVAL_DATA (1 << 12)
427 #define FUSE_DO_READDIRPLUS (1 << 13)
428 #define FUSE_READDIRPLUS_AUTO (1 << 14)
429 #define FUSE_ASYNC_DIO (1 << 15)
430 #define FUSE_WRITEBACK_CACHE (1 << 16)
431 #define FUSE_NO_OPEN_SUPPORT (1 << 17)
432 #define FUSE_PARALLEL_DIROPS (1 << 18)
433 #define FUSE_HANDLE_KILLPRIV (1 << 19)
434 #define FUSE_POSIX_ACL (1 << 20)
435 #define FUSE_ABORT_ERROR (1 << 21)
436 #define FUSE_MAX_PAGES (1 << 22)
437 #define FUSE_CACHE_SYMLINKS (1 << 23)
438 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
439 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
440 #define FUSE_MAP_ALIGNMENT (1 << 26)
441 #define FUSE_SUBMOUNTS (1 << 27)
442 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
443 #define FUSE_SETXATTR_EXT (1 << 29)
444 #define FUSE_INIT_EXT (1 << 30)
445 #define FUSE_INIT_RESERVED (1 << 31)
446 /* bits 32..63 get shifted down 32 bits into the flags2 field */
447 #define FUSE_SECURITY_CTX (1ULL << 32)
448 #define FUSE_HAS_INODE_DAX (1ULL << 33)
449 #define FUSE_CREATE_SUPP_GROUP (1ULL << 34)
450 #define FUSE_HAS_EXPIRE_ONLY (1ULL << 35)
451 #define FUSE_DIRECT_IO_ALLOW_MMAP (1ULL << 36)
453 /* Obsolete alias for FUSE_DIRECT_IO_ALLOW_MMAP */
454 #define FUSE_DIRECT_IO_RELAX FUSE_DIRECT_IO_ALLOW_MMAP
457 * CUSE INIT request/reply flags
459 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl
461 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
466 #define FUSE_RELEASE_FLUSH (1 << 0)
467 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1)
472 #define FUSE_GETATTR_FH (1 << 0)
477 #define FUSE_LK_FLOCK (1 << 0)
482 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
483 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
484 * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits
486 #define FUSE_WRITE_CACHE (1 << 0)
487 #define FUSE_WRITE_LOCKOWNER (1 << 1)
488 #define FUSE_WRITE_KILL_SUIDGID (1 << 2)
490 /* Obsolete alias; this flag implies killing suid/sgid only. */
491 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID
496 #define FUSE_READ_LOCKOWNER (1 << 1)
501 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
502 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
503 * FUSE_IOCTL_RETRY: retry with new iovecs
504 * FUSE_IOCTL_32BIT: 32bit ioctl
505 * FUSE_IOCTL_DIR: is a directory
506 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
508 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
510 #define FUSE_IOCTL_COMPAT (1 << 0)
511 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
512 #define FUSE_IOCTL_RETRY (1 << 2)
513 #define FUSE_IOCTL_32BIT (1 << 3)
514 #define FUSE_IOCTL_DIR (1 << 4)
515 #define FUSE_IOCTL_COMPAT_X32 (1 << 5)
517 #define FUSE_IOCTL_MAX_IOV 256
522 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
524 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
529 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
531 #define FUSE_FSYNC_FDATASYNC (1 << 0)
536 * FUSE_ATTR_SUBMOUNT: Object is a submount root
537 * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode
539 #define FUSE_ATTR_SUBMOUNT (1 << 0)
540 #define FUSE_ATTR_DAX (1 << 1)
544 * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable
546 #define FUSE_OPEN_KILL_SUIDGID (1 << 0)
550 * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set
552 #define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0)
555 * notify_inval_entry flags
558 #define FUSE_EXPIRE_ONLY (1 << 0)
562 * FUSE_MAX_NR_SECCTX: maximum value of &fuse_secctx_header.nr_secctx
563 * FUSE_EXT_GROUPS: &fuse_supp_groups extension
566 /* Types 0..31 are reserved for fuse_secctx_header */
567 FUSE_MAX_NR_SECCTX = 31,
568 FUSE_EXT_GROUPS = 32,
573 FUSE_FORGET = 2, /* no reply */
593 FUSE_REMOVEXATTR = 24,
598 FUSE_RELEASEDIR = 29,
610 FUSE_NOTIFY_REPLY = 41,
611 FUSE_BATCH_FORGET = 42,
613 FUSE_READDIRPLUS = 44,
616 FUSE_COPY_FILE_RANGE = 47,
617 FUSE_SETUPMAPPING = 48,
618 FUSE_REMOVEMAPPING = 49,
623 /* CUSE specific operations */
626 /* Reserved opcodes: helpful to detect structure endian-ness */
627 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */
628 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */
631 enum fuse_notify_code {
632 FUSE_NOTIFY_POLL = 1,
633 FUSE_NOTIFY_INVAL_INODE = 2,
634 FUSE_NOTIFY_INVAL_ENTRY = 3,
635 FUSE_NOTIFY_STORE = 4,
636 FUSE_NOTIFY_RETRIEVE = 5,
637 FUSE_NOTIFY_DELETE = 6,
638 FUSE_NOTIFY_CODE_MAX,
641 /* The read buffer is required to be at least 8k, but may be much larger */
642 #define FUSE_MIN_READ_BUFFER 8192
644 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
646 struct fuse_entry_out {
647 uint64_t nodeid; /* Inode ID */
648 uint64_t generation; /* Inode generation: nodeid:gen must
649 be unique for the fs's lifetime */
650 uint64_t entry_valid; /* Cache timeout for the name */
651 uint64_t attr_valid; /* Cache timeout for the attributes */
652 uint32_t entry_valid_nsec;
653 uint32_t attr_valid_nsec;
654 struct fuse_attr attr;
657 struct fuse_forget_in {
661 struct fuse_forget_one {
666 struct fuse_batch_forget_in {
671 struct fuse_getattr_in {
672 uint32_t getattr_flags;
677 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
679 struct fuse_attr_out {
680 uint64_t attr_valid; /* Cache timeout for the attributes */
681 uint32_t attr_valid_nsec;
683 struct fuse_attr attr;
686 struct fuse_statx_in {
687 uint32_t getattr_flags;
694 struct fuse_statx_out {
695 uint64_t attr_valid; /* Cache timeout for the attributes */
696 uint32_t attr_valid_nsec;
699 struct fuse_statx stat;
702 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
704 struct fuse_mknod_in {
711 struct fuse_mkdir_in {
716 struct fuse_rename_in {
720 struct fuse_rename2_in {
726 struct fuse_link_in {
730 struct fuse_setattr_in {
749 struct fuse_open_in {
751 uint32_t open_flags; /* FUSE_OPEN_... */
754 struct fuse_create_in {
758 uint32_t open_flags; /* FUSE_OPEN_... */
761 struct fuse_open_out {
767 struct fuse_release_in {
770 uint32_t release_flags;
774 struct fuse_flush_in {
781 struct fuse_read_in {
791 #define FUSE_COMPAT_WRITE_IN_SIZE 24
793 struct fuse_write_in {
797 uint32_t write_flags;
803 struct fuse_write_out {
808 #define FUSE_COMPAT_STATFS_SIZE 48
810 struct fuse_statfs_out {
811 struct fuse_kstatfs st;
814 struct fuse_fsync_in {
816 uint32_t fsync_flags;
820 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8
822 struct fuse_setxattr_in {
825 uint32_t setxattr_flags;
829 struct fuse_getxattr_in {
834 struct fuse_getxattr_out {
842 struct fuse_file_lock lk;
848 struct fuse_file_lock lk;
851 struct fuse_access_in {
856 struct fuse_init_in {
859 uint32_t max_readahead;
865 #define FUSE_COMPAT_INIT_OUT_SIZE 8
866 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
868 struct fuse_init_out {
871 uint32_t max_readahead;
873 uint16_t max_background;
874 uint16_t congestion_threshold;
878 uint16_t map_alignment;
883 #define CUSE_INIT_INFO_MAX 4096
885 struct cuse_init_in {
892 struct cuse_init_out {
899 uint32_t dev_major; /* chardev major */
900 uint32_t dev_minor; /* chardev minor */
904 struct fuse_interrupt_in {
908 struct fuse_bmap_in {
914 struct fuse_bmap_out {
918 struct fuse_ioctl_in {
927 struct fuse_ioctl_iovec {
932 struct fuse_ioctl_out {
939 struct fuse_poll_in {
946 struct fuse_poll_out {
951 struct fuse_notify_poll_wakeup_out {
955 struct fuse_fallocate_in {
963 struct fuse_in_header {
971 uint16_t total_extlen; /* length of extensions in 8byte units */
975 struct fuse_out_header {
989 /* Align variable length records to 64bit boundary */
990 #define FUSE_REC_ALIGN(x) \
991 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
993 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
994 #define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x)
995 #define FUSE_DIRENT_SIZE(d) \
996 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
998 struct fuse_direntplus {
999 struct fuse_entry_out entry_out;
1000 struct fuse_dirent dirent;
1003 #define FUSE_NAME_OFFSET_DIRENTPLUS \
1004 offsetof(struct fuse_direntplus, dirent.name)
1005 #define FUSE_DIRENTPLUS_SIZE(d) \
1006 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
1008 struct fuse_notify_inval_inode_out {
1014 struct fuse_notify_inval_entry_out {
1020 struct fuse_notify_delete_out {
1027 struct fuse_notify_store_out {
1034 struct fuse_notify_retrieve_out {
1035 uint64_t notify_unique;
1042 /* Matches the size of fuse_write_in */
1043 struct fuse_notify_retrieve_in {
1052 /* Device ioctls: */
1053 #define FUSE_DEV_IOC_MAGIC 229
1054 #define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
1056 struct fuse_lseek_in {
1063 struct fuse_lseek_out {
1067 struct fuse_copy_file_range_in {
1070 uint64_t nodeid_out;
1077 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
1078 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
1079 struct fuse_setupmapping_in {
1080 /* An already open handle */
1082 /* Offset into the file to start the mapping */
1084 /* Length of mapping required */
1086 /* Flags, FUSE_SETUPMAPPING_FLAG_* */
1088 /* Offset in Memory Window */
1092 struct fuse_removemapping_in {
1093 /* number of fuse_removemapping_one follows */
1097 struct fuse_removemapping_one {
1098 /* Offset into the dax window start the unmapping */
1100 /* Length of mapping required */
1104 #define FUSE_REMOVEMAPPING_MAX_ENTRY \
1105 (PAGE_SIZE / sizeof(struct fuse_removemapping_one))
1107 struct fuse_syncfs_in {
1112 * For each security context, send fuse_secctx with size of security context
1113 * fuse_secctx will be followed by security context name and this in turn
1114 * will be followed by actual context label.
1115 * fuse_secctx, name, context
1117 struct fuse_secctx {
1123 * Contains the information about how many fuse_secctx structures are being
1124 * sent and what's the total size of all security contexts (including
1125 * size of fuse_secctx_header).
1128 struct fuse_secctx_header {
1134 * struct fuse_ext_header - extension header
1135 * @size: total size of this extension including this header
1136 * @type: type of extension
1138 * This is made compatible with fuse_secctx_header by using type values >
1139 * FUSE_MAX_NR_SECCTX
1141 struct fuse_ext_header {
1147 * struct fuse_supp_groups - Supplementary group extension
1148 * @nr_groups: number of supplementary groups
1149 * @groups: flexible array of group IDs
1151 struct fuse_supp_groups {
1156 #endif /* _LINUX_FUSE_H */