include/uapi/linux/fuse.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  *
  48  * 7.10
  49  *  - add nonseekable open flag
  50  *
  51  * 7.11
  52  *  - add IOCTL message
  53  *  - add unsolicited notification support
  54  *  - add POLL message and NOTIFY_POLL notification
  55  *
  56  * 7.12
  57  *  - add umask flag to input argument of open, mknod and mkdir
  58  *  - add notification messages for invalidation of inodes and
  59  *    directory entries
  60  *
  61  * 7.13
  62  *  - make max number of background requests and congestion threshold
  63  *    tunables
  64  *
  65  * 7.14
  66  *  - add splice support to fuse device
  67  *
  68  * 7.15
  69  *  - add store notify
  70  *  - add retrieve notify
  71  *
  72  * 7.16
  73  *  - add BATCH_FORGET request
  74  *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
  75  *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
  76  *  - add FUSE_IOCTL_32BIT flag
  77  *
  78  * 7.17
  79  *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
  80  *
  81  * 7.18
  82  *  - add FUSE_IOCTL_DIR flag
  83  *  - add FUSE_NOTIFY_DELETE
  84  *
  85  * 7.19
  86  *  - add FUSE_FALLOCATE
  87  *
  88  * 7.20
  89  *  - add FUSE_AUTO_INVAL_DATA
  90  *
  91  * 7.21
  92  *  - add FUSE_READDIRPLUS
  93  *  - send the requested events in POLL request
  94  *
  95  * 7.22
  96  *  - add FUSE_ASYNC_DIO
  97  *
  98  * 7.23
  99  *  - add FUSE_WRITEBACK_CACHE
 100  *  - add time_gran to fuse_init_out
 101  *  - add reserved space to fuse_init_out
 102  *  - add FATTR_CTIME
 103  *  - add ctime and ctimensec to fuse_setattr_in
 104  *  - add FUSE_RENAME2 request
 105  *  - add FUSE_NO_OPEN_SUPPORT flag
 106  *
 107  *  7.24
 108  *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
 109  *
 110  *  7.25
 111  *  - add FUSE_PARALLEL_DIROPS
 112  *
 113  *  7.26
 114  *  - add FUSE_HANDLE_KILLPRIV
 115  *  - add FUSE_POSIX_ACL
 116  */
 117
 118 #ifndef _LINUX_FUSE_H
 119 #define _LINUX_FUSE_H
 120
 121 #ifdef __KERNEL__
 122 #include <linux/types.h>
 123 #else
 124 #include <stdint.h>
 125 #endif
 126
 127 /*
 128  * Version negotiation:
 129  *
 130  * Both the kernel and userspace send the version they support in the
 131  * INIT request and reply respectively.
 132  *
 133  * If the major versions match then both shall use the smallest
 134  * of the two minor versions for communication.
 135  *
 136  * If the kernel supports a larger major version, then userspace shall
 137  * reply with the major version it supports, ignore the rest of the
 138  * INIT message and expect a new INIT message from the kernel with a
 139  * matching major version.
 140  *
 141  * If the library supports a larger major version, then it shall fall
 142  * back to the major protocol version sent by the kernel for
 143  * communication and reply with that major version (and an arbitrary
 144  * supported minor version).
 145  */
 146
 147 /** Version number of this interface */
 148 #define FUSE_KERNEL_VERSION 7
 149
 150 /** Minor version number of this interface */
 151 #define FUSE_KERNEL_MINOR_VERSION 26
 152
 153 /** The node ID of the root inode */
 154 #define FUSE_ROOT_ID 1
 155
 156 /* Make sure all structures are padded to 64bit boundary, so 32bit
 157    userspace works under 64bit kernels */
 158
 159 struct fuse_attr {
 160         uint64_t        ino;
 161         uint64_t        size;
 162         uint64_t        blocks;
 163         uint64_t        atime;
 164         uint64_t        mtime;
 165         uint64_t        ctime;
 166         uint32_t        atimensec;
 167         uint32_t        mtimensec;
 168         uint32_t        ctimensec;
 169         uint32_t        mode;
 170         uint32_t        nlink;
 171         uint32_t        uid;
 172         uint32_t        gid;
 173         uint32_t        rdev;
 174         uint32_t        blksize;
 175         uint32_t        padding;
 176 };
 177
 178 struct fuse_kstatfs {
 179         uint64_t        blocks;
 180         uint64_t        bfree;
 181         uint64_t        bavail;
 182         uint64_t        files;
 183         uint64_t        ffree;
 184         uint32_t        bsize;
 185         uint32_t        namelen;
 186         uint32_t        frsize;
 187         uint32_t        padding;
 188         uint32_t        spare[6];
 189 };
 190
 191 struct fuse_file_lock {
 192         uint64_t        start;
 193         uint64_t        end;
 194         uint32_t        type;
 195         uint32_t        pid; /* tgid */
 196 };
 197
 198 /**
 199  * Bitmasks for fuse_setattr_in.valid
 200  */
 201 #define FATTR_MODE      (1 << 0)
 202 #define FATTR_UID       (1 << 1)
 203 #define FATTR_GID       (1 << 2)
 204 #define FATTR_SIZE      (1 << 3)
 205 #define FATTR_ATIME     (1 << 4)
 206 #define FATTR_MTIME     (1 << 5)
 207 #define FATTR_FH        (1 << 6)
 208 #define FATTR_ATIME_NOW (1 << 7)
 209 #define FATTR_MTIME_NOW (1 << 8)
 210 #define FATTR_LOCKOWNER (1 << 9)
 211 #define FATTR_CTIME     (1 << 10)
 212
 213 /**
 214  * Flags returned by the OPEN request
 215  *
 216  * FOPEN_DIRECT_IO: bypass page cache for this open file
 217  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
 218  * FOPEN_NONSEEKABLE: the file is not seekable
 219  */
 220 #define FOPEN_DIRECT_IO         (1 << 0)
 221 #define FOPEN_KEEP_CACHE        (1 << 1)
 222 #define FOPEN_NONSEEKABLE       (1 << 2)
 223
 224 /**
 225  * INIT request/reply flags
 226  *
 227  * FUSE_ASYNC_READ: asynchronous read requests
 228  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
 229  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
 230  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
 231  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
 232  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
 233  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
 234  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
 235  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
 236  * FUSE_SPLICE_READ: kernel supports splice read on the device
 237  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
 238  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
 239  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
 240  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
 241  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
 242  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
 243  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
 244  * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
 245  * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
 246  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
 247  * FUSE_POSIX_ACL: filesystem supports posix acls
 248  */
 249 #define FUSE_ASYNC_READ         (1 << 0)
 250 #define FUSE_POSIX_LOCKS        (1 << 1)
 251 #define FUSE_FILE_OPS           (1 << 2)
 252 #define FUSE_ATOMIC_O_TRUNC     (1 << 3)
 253 #define FUSE_EXPORT_SUPPORT     (1 << 4)
 254 #define FUSE_BIG_WRITES         (1 << 5)
 255 #define FUSE_DONT_MASK          (1 << 6)
 256 #define FUSE_SPLICE_WRITE       (1 << 7)
 257 #define FUSE_SPLICE_MOVE        (1 << 8)
 258 #define FUSE_SPLICE_READ        (1 << 9)
 259 #define FUSE_FLOCK_LOCKS        (1 << 10)
 260 #define FUSE_HAS_IOCTL_DIR      (1 << 11)
 261 #define FUSE_AUTO_INVAL_DATA    (1 << 12)
 262 #define FUSE_DO_READDIRPLUS     (1 << 13)
 263 #define FUSE_READDIRPLUS_AUTO   (1 << 14)
 264 #define FUSE_ASYNC_DIO          (1 << 15)
 265 #define FUSE_WRITEBACK_CACHE    (1 << 16)
 266 #define FUSE_NO_OPEN_SUPPORT    (1 << 17)
 267 #define FUSE_PARALLEL_DIROPS    (1 << 18)
 268 #define FUSE_HANDLE_KILLPRIV    (1 << 19)
 269 #define FUSE_POSIX_ACL          (1 << 20)
 270
 271 /**
 272  * CUSE INIT request/reply flags
 273  *
 274  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
 275  */
 276 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
 277
 278 /**
 279  * Release flags
 280  */
 281 #define FUSE_RELEASE_FLUSH      (1 << 0)
 282 #define FUSE_RELEASE_FLOCK_UNLOCK       (1 << 1)
 283
 284 /**
 285  * Getattr flags
 286  */
 287 #define FUSE_GETATTR_FH         (1 << 0)
 288
 289 /**
 290  * Lock flags
 291  */
 292 #define FUSE_LK_FLOCK           (1 << 0)
 293
 294 /**
 295  * WRITE flags
 296  *
 297  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
 298  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
 299  */
 300 #define FUSE_WRITE_CACHE        (1 << 0)
 301 #define FUSE_WRITE_LOCKOWNER    (1 << 1)
 302
 303 /**
 304  * Read flags
 305  */
 306 #define FUSE_READ_LOCKOWNER     (1 << 1)
 307
 308 /**
 309  * Ioctl flags
 310  *
 311  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
 312  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
 313  * FUSE_IOCTL_RETRY: retry with new iovecs
 314  * FUSE_IOCTL_32BIT: 32bit ioctl
 315  * FUSE_IOCTL_DIR: is a directory
 316  *
 317  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
 318  */
 319 #define FUSE_IOCTL_COMPAT       (1 << 0)
 320 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
 321 #define FUSE_IOCTL_RETRY        (1 << 2)
 322 #define FUSE_IOCTL_32BIT        (1 << 3)
 323 #define FUSE_IOCTL_DIR          (1 << 4)
 324
 325 #define FUSE_IOCTL_MAX_IOV      256
 326
 327 /**
 328  * Poll flags
 329  *
 330  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
 331  */
 332 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 333
 334 enum fuse_opcode {
 335         FUSE_LOOKUP        = 1,
 336         FUSE_FORGET        = 2,  /* no reply */
 337         FUSE_GETATTR       = 3,
 338         FUSE_SETATTR       = 4,
 339         FUSE_READLINK      = 5,
 340         FUSE_SYMLINK       = 6,
 341         FUSE_MKNOD         = 8,
 342         FUSE_MKDIR         = 9,
 343         FUSE_UNLINK        = 10,
 344         FUSE_RMDIR         = 11,
 345         FUSE_RENAME        = 12,
 346         FUSE_LINK          = 13,
 347         FUSE_OPEN          = 14,
 348         FUSE_READ          = 15,
 349         FUSE_WRITE         = 16,
 350         FUSE_STATFS        = 17,
 351         FUSE_RELEASE       = 18,
 352         FUSE_FSYNC         = 20,
 353         FUSE_SETXATTR      = 21,
 354         FUSE_GETXATTR      = 22,
 355         FUSE_LISTXATTR     = 23,
 356         FUSE_REMOVEXATTR   = 24,
 357         FUSE_FLUSH         = 25,
 358         FUSE_INIT          = 26,
 359         FUSE_OPENDIR       = 27,
 360         FUSE_READDIR       = 28,
 361         FUSE_RELEASEDIR    = 29,
 362         FUSE_FSYNCDIR      = 30,
 363         FUSE_GETLK         = 31,
 364         FUSE_SETLK         = 32,
 365         FUSE_SETLKW        = 33,
 366         FUSE_ACCESS        = 34,
 367         FUSE_CREATE        = 35,
 368         FUSE_INTERRUPT     = 36,
 369         FUSE_BMAP          = 37,
 370         FUSE_DESTROY       = 38,
 371         FUSE_IOCTL         = 39,
 372         FUSE_POLL          = 40,
 373         FUSE_NOTIFY_REPLY  = 41,
 374         FUSE_BATCH_FORGET  = 42,
 375         FUSE_FALLOCATE     = 43,
 376         FUSE_READDIRPLUS   = 44,
 377         FUSE_RENAME2       = 45,
 378         FUSE_LSEEK         = 46,
 379
 380         /* CUSE specific operations */
 381         CUSE_INIT          = 4096,
 382 };
 383
 384 enum fuse_notify_code {
 385         FUSE_NOTIFY_POLL   = 1,
 386         FUSE_NOTIFY_INVAL_INODE = 2,
 387         FUSE_NOTIFY_INVAL_ENTRY = 3,
 388         FUSE_NOTIFY_STORE = 4,
 389         FUSE_NOTIFY_RETRIEVE = 5,
 390         FUSE_NOTIFY_DELETE = 6,
 391         FUSE_NOTIFY_CODE_MAX,
 392 };
 393
 394 /* The read buffer is required to be at least 8k, but may be much larger */
 395 #define FUSE_MIN_READ_BUFFER 8192
 396
 397 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
 398
 399 struct fuse_entry_out {
 400         uint64_t        nodeid;         /* Inode ID */
 401         uint64_t        generation;     /* Inode generation: nodeid:gen must
 402                                            be unique for the fs's lifetime */
 403         uint64_t        entry_valid;    /* Cache timeout for the name */
 404         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 405         uint32_t        entry_valid_nsec;
 406         uint32_t        attr_valid_nsec;
 407         struct fuse_attr attr;
 408 };
 409
 410 struct fuse_forget_in {
 411         uint64_t        nlookup;
 412 };
 413
 414 struct fuse_forget_one {
 415         uint64_t        nodeid;
 416         uint64_t        nlookup;
 417 };
 418
 419 struct fuse_batch_forget_in {
 420         uint32_t        count;
 421         uint32_t        dummy;
 422 };
 423
 424 struct fuse_getattr_in {
 425         uint32_t        getattr_flags;
 426         uint32_t        dummy;
 427         uint64_t        fh;
 428 };
 429
 430 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
 431
 432 struct fuse_attr_out {
 433         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 434         uint32_t        attr_valid_nsec;
 435         uint32_t        dummy;
 436         struct fuse_attr attr;
 437 };
 438
 439 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
 440
 441 struct fuse_mknod_in {
 442         uint32_t        mode;
 443         uint32_t        rdev;
 444         uint32_t        umask;
 445         uint32_t        padding;
 446 };
 447
 448 struct fuse_mkdir_in {
 449         uint32_t        mode;
 450         uint32_t        umask;
 451 };
 452
 453 struct fuse_rename_in {
 454         uint64_t        newdir;
 455 };
 456
 457 struct fuse_rename2_in {
 458         uint64_t        newdir;
 459         uint32_t        flags;
 460         uint32_t        padding;
 461 };
 462
 463 struct fuse_link_in {
 464         uint64_t        oldnodeid;
 465 };
 466
 467 struct fuse_setattr_in {
 468         uint32_t        valid;
 469         uint32_t        padding;
 470         uint64_t        fh;
 471         uint64_t        size;
 472         uint64_t        lock_owner;
 473         uint64_t        atime;
 474         uint64_t        mtime;
 475         uint64_t        ctime;
 476         uint32_t        atimensec;
 477         uint32_t        mtimensec;
 478         uint32_t        ctimensec;
 479         uint32_t        mode;
 480         uint32_t        unused4;
 481         uint32_t        uid;
 482         uint32_t        gid;
 483         uint32_t        unused5;
 484 };
 485
 486 struct fuse_open_in {
 487         uint32_t        flags;
 488         uint32_t        unused;
 489 };
 490
 491 struct fuse_create_in {
 492         uint32_t        flags;
 493         uint32_t        mode;
 494         uint32_t        umask;
 495         uint32_t        padding;
 496 };
 497
 498 struct fuse_open_out {
 499         uint64_t        fh;
 500         uint32_t        open_flags;
 501         uint32_t        padding;
 502 };
 503
 504 struct fuse_release_in {
 505         uint64_t        fh;
 506         uint32_t        flags;
 507         uint32_t        release_flags;
 508         uint64_t        lock_owner;
 509 };
 510
 511 struct fuse_flush_in {
 512         uint64_t        fh;
 513         uint32_t        unused;
 514         uint32_t        padding;
 515         uint64_t        lock_owner;
 516 };
 517
 518 struct fuse_read_in {
 519         uint64_t        fh;
 520         uint64_t        offset;
 521         uint32_t        size;
 522         uint32_t        read_flags;
 523         uint64_t        lock_owner;
 524         uint32_t        flags;
 525         uint32_t        padding;
 526 };
 527
 528 #define FUSE_COMPAT_WRITE_IN_SIZE 24
 529
 530 struct fuse_write_in {
 531         uint64_t        fh;
 532         uint64_t        offset;
 533         uint32_t        size;
 534         uint32_t        write_flags;
 535         uint64_t        lock_owner;
 536         uint32_t        flags;
 537         uint32_t        padding;
 538 };
 539
 540 struct fuse_write_out {
 541         uint32_t        size;
 542         uint32_t        padding;
 543 };
 544
 545 #define FUSE_COMPAT_STATFS_SIZE 48
 546
 547 struct fuse_statfs_out {
 548         struct fuse_kstatfs st;
 549 };
 550
 551 struct fuse_fsync_in {
 552         uint64_t        fh;
 553         uint32_t        fsync_flags;
 554         uint32_t        padding;
 555 };
 556
 557 struct fuse_setxattr_in {
 558         uint32_t        size;
 559         uint32_t        flags;
 560 };
 561
 562 struct fuse_getxattr_in {
 563         uint32_t        size;
 564         uint32_t        padding;
 565 };
 566
 567 struct fuse_getxattr_out {
 568         uint32_t        size;
 569         uint32_t        padding;
 570 };
 571
 572 struct fuse_lk_in {
 573         uint64_t        fh;
 574         uint64_t        owner;
 575         struct fuse_file_lock lk;
 576         uint32_t        lk_flags;
 577         uint32_t        padding;
 578 };
 579
 580 struct fuse_lk_out {
 581         struct fuse_file_lock lk;
 582 };
 583
 584 struct fuse_access_in {
 585         uint32_t        mask;
 586         uint32_t        padding;
 587 };
 588
 589 struct fuse_init_in {
 590         uint32_t        major;
 591         uint32_t        minor;
 592         uint32_t        max_readahead;
 593         uint32_t        flags;
 594 };
 595
 596 #define FUSE_COMPAT_INIT_OUT_SIZE 8
 597 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
 598
 599 struct fuse_init_out {
 600         uint32_t        major;
 601         uint32_t        minor;
 602         uint32_t        max_readahead;
 603         uint32_t        flags;
 604         uint16_t        max_background;
 605         uint16_t        congestion_threshold;
 606         uint32_t        max_write;
 607         uint32_t        time_gran;
 608         uint32_t        unused[9];
 609 };
 610
 611 #define CUSE_INIT_INFO_MAX 4096
 612
 613 struct cuse_init_in {
 614         uint32_t        major;
 615         uint32_t        minor;
 616         uint32_t        unused;
 617         uint32_t        flags;
 618 };
 619
 620 struct cuse_init_out {
 621         uint32_t        major;
 622         uint32_t        minor;
 623         uint32_t        unused;
 624         uint32_t        flags;
 625         uint32_t        max_read;
 626         uint32_t        max_write;
 627         uint32_t        dev_major;              /* chardev major */
 628         uint32_t        dev_minor;              /* chardev minor */
 629         uint32_t        spare[10];
 630 };
 631
 632 struct fuse_interrupt_in {
 633         uint64_t        unique;
 634 };
 635
 636 struct fuse_bmap_in {
 637         uint64_t        block;
 638         uint32_t        blocksize;
 639         uint32_t        padding;
 640 };
 641
 642 struct fuse_bmap_out {
 643         uint64_t        block;
 644 };
 645
 646 struct fuse_ioctl_in {
 647         uint64_t        fh;
 648         uint32_t        flags;
 649         uint32_t        cmd;
 650         uint64_t        arg;
 651         uint32_t        in_size;
 652         uint32_t        out_size;
 653 };
 654
 655 struct fuse_ioctl_iovec {
 656         uint64_t        base;
 657         uint64_t        len;
 658 };
 659
 660 struct fuse_ioctl_out {
 661         int32_t         result;
 662         uint32_t        flags;
 663         uint32_t        in_iovs;
 664         uint32_t        out_iovs;
 665 };
 666
 667 struct fuse_poll_in {
 668         uint64_t        fh;
 669         uint64_t        kh;
 670         uint32_t        flags;
 671         uint32_t        events;
 672 };
 673
 674 struct fuse_poll_out {
 675         uint32_t        revents;
 676         uint32_t        padding;
 677 };
 678
 679 struct fuse_notify_poll_wakeup_out {
 680         uint64_t        kh;
 681 };
 682
 683 struct fuse_fallocate_in {
 684         uint64_t        fh;
 685         uint64_t        offset;
 686         uint64_t        length;
 687         uint32_t        mode;
 688         uint32_t        padding;
 689 };
 690
 691 struct fuse_in_header {
 692         uint32_t        len;
 693         uint32_t        opcode;
 694         uint64_t        unique;
 695         uint64_t        nodeid;
 696         uint32_t        uid;
 697         uint32_t        gid;
 698         uint32_t        pid;
 699         uint32_t        padding;
 700 };
 701
 702 struct fuse_out_header {
 703         uint32_t        len;
 704         int32_t         error;
 705         uint64_t        unique;
 706 };
 707
 708 struct fuse_dirent {
 709         uint64_t        ino;
 710         uint64_t        off;
 711         uint32_t        namelen;
 712         uint32_t        type;
 713         char name[];
 714 };
 715
 716 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
 717 #define FUSE_DIRENT_ALIGN(x) \
 718         (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
 719 #define FUSE_DIRENT_SIZE(d) \
 720         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
 721
 722 struct fuse_direntplus {
 723         struct fuse_entry_out entry_out;
 724         struct fuse_dirent dirent;
 725 };
 726
 727 #define FUSE_NAME_OFFSET_DIRENTPLUS \
 728         offsetof(struct fuse_direntplus, dirent.name)
 729 #define FUSE_DIRENTPLUS_SIZE(d) \
 730         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
 731
 732 struct fuse_notify_inval_inode_out {
 733         uint64_t        ino;
 734         int64_t         off;
 735         int64_t         len;
 736 };
 737
 738 struct fuse_notify_inval_entry_out {
 739         uint64_t        parent;
 740         uint32_t        namelen;
 741         uint32_t        padding;
 742 };
 743
 744 struct fuse_notify_delete_out {
 745         uint64_t        parent;
 746         uint64_t        child;
 747         uint32_t        namelen;
 748         uint32_t        padding;
 749 };
 750
 751 struct fuse_notify_store_out {
 752         uint64_t        nodeid;
 753         uint64_t        offset;
 754         uint32_t        size;
 755         uint32_t        padding;
 756 };
 757
 758 struct fuse_notify_retrieve_out {
 759         uint64_t        notify_unique;
 760         uint64_t        nodeid;
 761         uint64_t        offset;
 762         uint32_t        size;
 763         uint32_t        padding;
 764 };
 765
 766 /* Matches the size of fuse_write_in */
 767 struct fuse_notify_retrieve_in {
 768         uint64_t        dummy1;
 769         uint64_t        offset;
 770         uint32_t        size;
 771         uint32_t        dummy2;
 772         uint64_t        dummy3;
 773         uint64_t        dummy4;
 774 };
 775
 776 /* Device ioctls: */
 777 #define FUSE_DEV_IOC_CLONE      _IOR(229, 0, uint32_t)
 778
 779 struct fuse_lseek_in {
 780         uint64_t        fh;
 781         uint64_t        offset;
 782         uint32_t        whence;
 783         uint32_t        padding;
 784 };
 785
 786 struct fuse_lseek_out {
 787         uint64_t        offset;
 788 };
 789
 790 #endif /* _LINUX_FUSE_H */