sys/vfs/fuse/fuse_abi.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  * XXX Note: Don't edit this file. Keep it unchanged from Linux kernel.
  38  */
  39 /*
  40  * This file defines the kernel interface of FUSE
  41  *
  42  * Protocol changelog:
  43  *
  44  * 7.9:
  45  *  - new fuse_getattr_in input argument of GETATTR
  46  *  - add lk_flags in fuse_lk_in
  47  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
  48  *  - add blksize field to fuse_attr
  49  *  - add file flags field to fuse_read_in and fuse_write_in
  50  *
  51  * 7.10
  52  *  - add nonseekable open flag
  53  *
  54  * 7.11
  55  *  - add IOCTL message
  56  *  - add unsolicited notification support
  57  *  - add POLL message and NOTIFY_POLL notification
  58  *
  59  * 7.12
  60  *  - add umask flag to input argument of open, mknod and mkdir
  61  *  - add notification messages for invalidation of inodes and
  62  *    directory entries
  63  *
  64  * 7.13
  65  *  - make max number of background requests and congestion threshold
  66  *    tunables
  67  *
  68  * 7.14
  69  *  - add splice support to fuse device
  70  *
  71  * 7.15
  72  *  - add store notify
  73  *  - add retrieve notify
  74  *
  75  * 7.16
  76  *  - add BATCH_FORGET request
  77  *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
  78  *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
  79  *  - add FUSE_IOCTL_32BIT flag
  80  *
  81  * 7.17
  82  *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
  83  *
  84  * 7.18
  85  *  - add FUSE_IOCTL_DIR flag
  86  *  - add FUSE_NOTIFY_DELETE
  87  *
  88  * 7.19
  89  *  - add FUSE_FALLOCATE
  90  *
  91  * 7.20
  92  *  - add FUSE_AUTO_INVAL_DATA
  93  *
  94  * 7.21
  95  *  - add FUSE_READDIRPLUS
  96  *  - send the requested events in POLL request
  97  *
  98  * 7.22
  99  *  - add FUSE_ASYNC_DIO
 100  *
 101  * 7.23
 102  *  - add FUSE_WRITEBACK_CACHE
 103  *  - add time_gran to fuse_init_out
 104  *  - add reserved space to fuse_init_out
 105  *  - add FATTR_CTIME
 106  *  - add ctime and ctimensec to fuse_setattr_in
 107  *  - add FUSE_RENAME2 request
 108  *  - add FUSE_NO_OPEN_SUPPORT flag
 109  *
 110  *  7.24
 111  *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
 112  *
 113  *  7.25
 114  *  - add FUSE_PARALLEL_DIROPS
 115  *
 116  *  7.26
 117  *  - add FUSE_HANDLE_KILLPRIV
 118  *  - add FUSE_POSIX_ACL
 119  *
 120  *  7.27
 121  *  - add FUSE_ABORT_ERROR
 122  *
 123  *  7.28
 124  *  - add FUSE_COPY_FILE_RANGE
 125  *  - add FOPEN_CACHE_DIR
 126  *  - add FUSE_MAX_PAGES, add max_pages to init_out
 127  *  - add FUSE_CACHE_SYMLINKS
 128  */
 129
 130 #ifndef _LINUX_FUSE_H
 131 #define _LINUX_FUSE_H
 132
 133 #if defined(_KERNEL)
 134 #include <sys/stdint.h>
 135 #elif defined(__KERNEL__)
 136 #include <linux/types.h>
 137 #else
 138 #include <stdint.h>
 139 #endif
 140
 141 /*
 142  * Version negotiation:
 143  *
 144  * Both the kernel and userspace send the version they support in the
 145  * INIT request and reply respectively.
 146  *
 147  * If the major versions match then both shall use the smallest
 148  * of the two minor versions for communication.
 149  *
 150  * If the kernel supports a larger major version, then userspace shall
 151  * reply with the major version it supports, ignore the rest of the
 152  * INIT message and expect a new INIT message from the kernel with a
 153  * matching major version.
 154  *
 155  * If the library supports a larger major version, then it shall fall
 156  * back to the major protocol version sent by the kernel for
 157  * communication and reply with that major version (and an arbitrary
 158  * supported minor version).
 159  */
 160
 161 /** Version number of this interface */
 162 #define FUSE_KERNEL_VERSION 7
 163
 164 /** Minor version number of this interface */
 165 #define FUSE_KERNEL_MINOR_VERSION 28
 166
 167 /** The node ID of the root inode */
 168 #define FUSE_ROOT_ID 1
 169
 170 /* Make sure all structures are padded to 64bit boundary, so 32bit
 171    userspace works under 64bit kernels */
 172
 173 struct fuse_attr {
 174         uint64_t        ino;
 175         uint64_t        size;
 176         uint64_t        blocks;
 177         uint64_t        atime;
 178         uint64_t        mtime;
 179         uint64_t        ctime;
 180         uint32_t        atimensec;
 181         uint32_t        mtimensec;
 182         uint32_t        ctimensec;
 183         uint32_t        mode;
 184         uint32_t        nlink;
 185         uint32_t        uid;
 186         uint32_t        gid;
 187         uint32_t        rdev;
 188         uint32_t        blksize;
 189         uint32_t        padding;
 190 };
 191
 192 struct fuse_kstatfs {
 193         uint64_t        blocks;
 194         uint64_t        bfree;
 195         uint64_t        bavail;
 196         uint64_t        files;
 197         uint64_t        ffree;
 198         uint32_t        bsize;
 199         uint32_t        namelen;
 200         uint32_t        frsize;
 201         uint32_t        padding;
 202         uint32_t        spare[6];
 203 };
 204
 205 struct fuse_file_lock {
 206         uint64_t        start;
 207         uint64_t        end;
 208         uint32_t        type;
 209         uint32_t        pid; /* tgid */
 210 };
 211
 212 /**
 213  * Bitmasks for fuse_setattr_in.valid
 214  */
 215 #define FATTR_MODE      (1 << 0)
 216 #define FATTR_UID       (1 << 1)
 217 #define FATTR_GID       (1 << 2)
 218 #define FATTR_SIZE      (1 << 3)
 219 #define FATTR_ATIME     (1 << 4)
 220 #define FATTR_MTIME     (1 << 5)
 221 #define FATTR_FH        (1 << 6)
 222 #define FATTR_ATIME_NOW (1 << 7)
 223 #define FATTR_MTIME_NOW (1 << 8)
 224 #define FATTR_LOCKOWNER (1 << 9)
 225 #define FATTR_CTIME     (1 << 10)
 226
 227 /**
 228  * Flags returned by the OPEN request
 229  *
 230  * FOPEN_DIRECT_IO: bypass page cache for this open file
 231  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
 232  * FOPEN_NONSEEKABLE: the file is not seekable
 233  * FOPEN_CACHE_DIR: allow caching this directory
 234  */
 235 #define FOPEN_DIRECT_IO         (1 << 0)
 236 #define FOPEN_KEEP_CACHE        (1 << 1)
 237 #define FOPEN_NONSEEKABLE       (1 << 2)
 238 #define FOPEN_CACHE_DIR         (1 << 3)
 239
 240 /**
 241  * INIT request/reply flags
 242  *
 243  * FUSE_ASYNC_READ: asynchronous read requests
 244  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
 245  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
 246  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
 247  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
 248  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
 249  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
 250  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
 251  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
 252  * FUSE_SPLICE_READ: kernel supports splice read on the device
 253  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
 254  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
 255  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
 256  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
 257  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
 258  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
 259  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
 260  * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
 261  * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
 262  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
 263  * FUSE_POSIX_ACL: filesystem supports posix acls
 264  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
 265  * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
 266  * FUSE_CACHE_SYMLINKS: cache READLINK responses
 267  */
 268 #define FUSE_ASYNC_READ         (1 << 0)
 269 #define FUSE_POSIX_LOCKS        (1 << 1)
 270 #define FUSE_FILE_OPS           (1 << 2)
 271 #define FUSE_ATOMIC_O_TRUNC     (1 << 3)
 272 #define FUSE_EXPORT_SUPPORT     (1 << 4)
 273 #define FUSE_BIG_WRITES         (1 << 5)
 274 #define FUSE_DONT_MASK          (1 << 6)
 275 #define FUSE_SPLICE_WRITE       (1 << 7)
 276 #define FUSE_SPLICE_MOVE        (1 << 8)
 277 #define FUSE_SPLICE_READ        (1 << 9)
 278 #define FUSE_FLOCK_LOCKS        (1 << 10)
 279 #define FUSE_HAS_IOCTL_DIR      (1 << 11)
 280 #define FUSE_AUTO_INVAL_DATA    (1 << 12)
 281 #define FUSE_DO_READDIRPLUS     (1 << 13)
 282 #define FUSE_READDIRPLUS_AUTO   (1 << 14)
 283 #define FUSE_ASYNC_DIO          (1 << 15)
 284 #define FUSE_WRITEBACK_CACHE    (1 << 16)
 285 #define FUSE_NO_OPEN_SUPPORT    (1 << 17)
 286 #define FUSE_PARALLEL_DIROPS    (1 << 18)
 287 #define FUSE_HANDLE_KILLPRIV    (1 << 19)
 288 #define FUSE_POSIX_ACL          (1 << 20)
 289 #define FUSE_ABORT_ERROR        (1 << 21)
 290 #define FUSE_MAX_PAGES          (1 << 22)
 291 #define FUSE_CACHE_SYMLINKS     (1 << 23)
 292
 293 /**
 294  * CUSE INIT request/reply flags
 295  *
 296  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
 297  */
 298 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
 299
 300 /**
 301  * Release flags
 302  */
 303 #define FUSE_RELEASE_FLUSH      (1 << 0)
 304 #define FUSE_RELEASE_FLOCK_UNLOCK       (1 << 1)
 305
 306 /**
 307  * Getattr flags
 308  */
 309 #define FUSE_GETATTR_FH         (1 << 0)
 310
 311 /**
 312  * Lock flags
 313  */
 314 #define FUSE_LK_FLOCK           (1 << 0)
 315
 316 /**
 317  * WRITE flags
 318  *
 319  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
 320  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
 321  */
 322 #define FUSE_WRITE_CACHE        (1 << 0)
 323 #define FUSE_WRITE_LOCKOWNER    (1 << 1)
 324
 325 /**
 326  * Read flags
 327  */
 328 #define FUSE_READ_LOCKOWNER     (1 << 1)
 329
 330 /**
 331  * Ioctl flags
 332  *
 333  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
 334  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
 335  * FUSE_IOCTL_RETRY: retry with new iovecs
 336  * FUSE_IOCTL_32BIT: 32bit ioctl
 337  * FUSE_IOCTL_DIR: is a directory
 338  *
 339  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
 340  */
 341 #define FUSE_IOCTL_COMPAT       (1 << 0)
 342 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
 343 #define FUSE_IOCTL_RETRY        (1 << 2)
 344 #define FUSE_IOCTL_32BIT        (1 << 3)
 345 #define FUSE_IOCTL_DIR          (1 << 4)
 346
 347 #define FUSE_IOCTL_MAX_IOV      256
 348
 349 /**
 350  * Poll flags
 351  *
 352  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
 353  */
 354 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 355
 356 enum fuse_opcode {
 357         FUSE_LOOKUP             = 1,
 358         FUSE_FORGET             = 2,  /* no reply */
 359         FUSE_GETATTR            = 3,
 360         FUSE_SETATTR            = 4,
 361         FUSE_READLINK           = 5,
 362         FUSE_SYMLINK            = 6,
 363         FUSE_MKNOD              = 8,
 364         FUSE_MKDIR              = 9,
 365         FUSE_UNLINK             = 10,
 366         FUSE_RMDIR              = 11,
 367         FUSE_RENAME             = 12,
 368         FUSE_LINK               = 13,
 369         FUSE_OPEN               = 14,
 370         FUSE_READ               = 15,
 371         FUSE_WRITE              = 16,
 372         FUSE_STATFS             = 17,
 373         FUSE_RELEASE            = 18,
 374         FUSE_FSYNC              = 20,
 375         FUSE_SETXATTR           = 21,
 376         FUSE_GETXATTR           = 22,
 377         FUSE_LISTXATTR          = 23,
 378         FUSE_REMOVEXATTR        = 24,
 379         FUSE_FLUSH              = 25,
 380         FUSE_INIT               = 26,
 381         FUSE_OPENDIR            = 27,
 382         FUSE_READDIR            = 28,
 383         FUSE_RELEASEDIR         = 29,
 384         FUSE_FSYNCDIR           = 30,
 385         FUSE_GETLK              = 31,
 386         FUSE_SETLK              = 32,
 387         FUSE_SETLKW             = 33,
 388         FUSE_ACCESS             = 34,
 389         FUSE_CREATE             = 35,
 390         FUSE_INTERRUPT          = 36,
 391         FUSE_BMAP               = 37,
 392         FUSE_DESTROY            = 38,
 393         FUSE_IOCTL              = 39,
 394         FUSE_POLL               = 40,
 395         FUSE_NOTIFY_REPLY       = 41,
 396         FUSE_BATCH_FORGET       = 42,
 397         FUSE_FALLOCATE          = 43,
 398         FUSE_READDIRPLUS        = 44,
 399         FUSE_RENAME2            = 45,
 400         FUSE_LSEEK              = 46,
 401         FUSE_COPY_FILE_RANGE    = 47,
 402
 403         /* CUSE specific operations */
 404         CUSE_INIT               = 4096,
 405 };
 406
 407 enum fuse_notify_code {
 408         FUSE_NOTIFY_POLL   = 1,
 409         FUSE_NOTIFY_INVAL_INODE = 2,
 410         FUSE_NOTIFY_INVAL_ENTRY = 3,
 411         FUSE_NOTIFY_STORE = 4,
 412         FUSE_NOTIFY_RETRIEVE = 5,
 413         FUSE_NOTIFY_DELETE = 6,
 414         FUSE_NOTIFY_CODE_MAX,
 415 };
 416
 417 /* The read buffer is required to be at least 8k, but may be much larger */
 418 #define FUSE_MIN_READ_BUFFER 8192
 419
 420 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
 421
 422 struct fuse_entry_out {
 423         uint64_t        nodeid;         /* Inode ID */
 424         uint64_t        generation;     /* Inode generation: nodeid:gen must
 425                                            be unique for the fs's lifetime */
 426         uint64_t        entry_valid;    /* Cache timeout for the name */
 427         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 428         uint32_t        entry_valid_nsec;
 429         uint32_t        attr_valid_nsec;
 430         struct fuse_attr attr;
 431 };
 432
 433 struct fuse_forget_in {
 434         uint64_t        nlookup;
 435 };
 436
 437 struct fuse_forget_one {
 438         uint64_t        nodeid;
 439         uint64_t        nlookup;
 440 };
 441
 442 struct fuse_batch_forget_in {
 443         uint32_t        count;
 444         uint32_t        dummy;
 445 };
 446
 447 struct fuse_getattr_in {
 448         uint32_t        getattr_flags;
 449         uint32_t        dummy;
 450         uint64_t        fh;
 451 };
 452
 453 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
 454
 455 struct fuse_attr_out {
 456         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 457         uint32_t        attr_valid_nsec;
 458         uint32_t        dummy;
 459         struct fuse_attr attr;
 460 };
 461
 462 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
 463
 464 struct fuse_mknod_in {
 465         uint32_t        mode;
 466         uint32_t        rdev;
 467         uint32_t        umask;
 468         uint32_t        padding;
 469 };
 470
 471 struct fuse_mkdir_in {
 472         uint32_t        mode;
 473         uint32_t        umask;
 474 };
 475
 476 struct fuse_rename_in {
 477         uint64_t        newdir;
 478 };
 479
 480 struct fuse_rename2_in {
 481         uint64_t        newdir;
 482         uint32_t        flags;
 483         uint32_t        padding;
 484 };
 485
 486 struct fuse_link_in {
 487         uint64_t        oldnodeid;
 488 };
 489
 490 struct fuse_setattr_in {
 491         uint32_t        valid;
 492         uint32_t        padding;
 493         uint64_t        fh;
 494         uint64_t        size;
 495         uint64_t        lock_owner;
 496         uint64_t        atime;
 497         uint64_t        mtime;
 498         uint64_t        ctime;
 499         uint32_t        atimensec;
 500         uint32_t        mtimensec;
 501         uint32_t        ctimensec;
 502         uint32_t        mode;
 503         uint32_t        unused4;
 504         uint32_t        uid;
 505         uint32_t        gid;
 506         uint32_t        unused5;
 507 };
 508
 509 struct fuse_open_in {
 510         uint32_t        flags;
 511         uint32_t        unused;
 512 };
 513
 514 struct fuse_create_in {
 515         uint32_t        flags;
 516         uint32_t        mode;
 517         uint32_t        umask;
 518         uint32_t        padding;
 519 };
 520
 521 struct fuse_open_out {
 522         uint64_t        fh;
 523         uint32_t        open_flags;
 524         uint32_t        padding;
 525 };
 526
 527 struct fuse_release_in {
 528         uint64_t        fh;
 529         uint32_t        flags;
 530         uint32_t        release_flags;
 531         uint64_t        lock_owner;
 532 };
 533
 534 struct fuse_flush_in {
 535         uint64_t        fh;
 536         uint32_t        unused;
 537         uint32_t        padding;
 538         uint64_t        lock_owner;
 539 };
 540
 541 struct fuse_read_in {
 542         uint64_t        fh;
 543         uint64_t        offset;
 544         uint32_t        size;
 545         uint32_t        read_flags;
 546         uint64_t        lock_owner;
 547         uint32_t        flags;
 548         uint32_t        padding;
 549 };
 550
 551 #define FUSE_COMPAT_WRITE_IN_SIZE 24
 552
 553 struct fuse_write_in {
 554         uint64_t        fh;
 555         uint64_t        offset;
 556         uint32_t        size;
 557         uint32_t        write_flags;
 558         uint64_t        lock_owner;
 559         uint32_t        flags;
 560         uint32_t        padding;
 561 };
 562
 563 struct fuse_write_out {
 564         uint32_t        size;
 565         uint32_t        padding;
 566 };
 567
 568 #define FUSE_COMPAT_STATFS_SIZE 48
 569
 570 struct fuse_statfs_out {
 571         struct fuse_kstatfs st;
 572 };
 573
 574 struct fuse_fsync_in {
 575         uint64_t        fh;
 576         uint32_t        fsync_flags;
 577         uint32_t        padding;
 578 };
 579
 580 struct fuse_setxattr_in {
 581         uint32_t        size;
 582         uint32_t        flags;
 583 };
 584
 585 struct fuse_getxattr_in {
 586         uint32_t        size;
 587         uint32_t        padding;
 588 };
 589
 590 struct fuse_getxattr_out {
 591         uint32_t        size;
 592         uint32_t        padding;
 593 };
 594
 595 struct fuse_lk_in {
 596         uint64_t        fh;
 597         uint64_t        owner;
 598         struct fuse_file_lock lk;
 599         uint32_t        lk_flags;
 600         uint32_t        padding;
 601 };
 602
 603 struct fuse_lk_out {
 604         struct fuse_file_lock lk;
 605 };
 606
 607 struct fuse_access_in {
 608         uint32_t        mask;
 609         uint32_t        padding;
 610 };
 611
 612 struct fuse_init_in {
 613         uint32_t        major;
 614         uint32_t        minor;
 615         uint32_t        max_readahead;
 616         uint32_t        flags;
 617 };
 618
 619 #define FUSE_COMPAT_INIT_OUT_SIZE 8
 620 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
 621
 622 struct fuse_init_out {
 623         uint32_t        major;
 624         uint32_t        minor;
 625         uint32_t        max_readahead;
 626         uint32_t        flags;
 627         uint16_t        max_background;
 628         uint16_t        congestion_threshold;
 629         uint32_t        max_write;
 630         uint32_t        time_gran;
 631         uint16_t        max_pages;
 632         uint16_t        padding;
 633         uint32_t        unused[8];
 634 };
 635
 636 #define CUSE_INIT_INFO_MAX 4096
 637
 638 struct cuse_init_in {
 639         uint32_t        major;
 640         uint32_t        minor;
 641         uint32_t        unused;
 642         uint32_t        flags;
 643 };
 644
 645 struct cuse_init_out {
 646         uint32_t        major;
 647         uint32_t        minor;
 648         uint32_t        unused;
 649         uint32_t        flags;
 650         uint32_t        max_read;
 651         uint32_t        max_write;
 652         uint32_t        dev_major;              /* chardev major */
 653         uint32_t        dev_minor;              /* chardev minor */
 654         uint32_t        spare[10];
 655 };
 656
 657 struct fuse_interrupt_in {
 658         uint64_t        unique;
 659 };
 660
 661 struct fuse_bmap_in {
 662         uint64_t        block;
 663         uint32_t        blocksize;
 664         uint32_t        padding;
 665 };
 666
 667 struct fuse_bmap_out {
 668         uint64_t        block;
 669 };
 670
 671 struct fuse_ioctl_in {
 672         uint64_t        fh;
 673         uint32_t        flags;
 674         uint32_t        cmd;
 675         uint64_t        arg;
 676         uint32_t        in_size;
 677         uint32_t        out_size;
 678 };
 679
 680 struct fuse_ioctl_iovec {
 681         uint64_t        base;
 682         uint64_t        len;
 683 };
 684
 685 struct fuse_ioctl_out {
 686         int32_t         result;
 687         uint32_t        flags;
 688         uint32_t        in_iovs;
 689         uint32_t        out_iovs;
 690 };
 691
 692 struct fuse_poll_in {
 693         uint64_t        fh;
 694         uint64_t        kh;
 695         uint32_t        flags;
 696         uint32_t        events;
 697 };
 698
 699 struct fuse_poll_out {
 700         uint32_t        revents;
 701         uint32_t        padding;
 702 };
 703
 704 struct fuse_notify_poll_wakeup_out {
 705         uint64_t        kh;
 706 };
 707
 708 struct fuse_fallocate_in {
 709         uint64_t        fh;
 710         uint64_t        offset;
 711         uint64_t        length;
 712         uint32_t        mode;
 713         uint32_t        padding;
 714 };
 715
 716 struct fuse_in_header {
 717         uint32_t        len;
 718         uint32_t        opcode;
 719         uint64_t        unique;
 720         uint64_t        nodeid;
 721         uint32_t        uid;
 722         uint32_t        gid;
 723         uint32_t        pid;
 724         uint32_t        padding;
 725 };
 726
 727 struct fuse_out_header {
 728         uint32_t        len;
 729         int32_t         error;
 730         uint64_t        unique;
 731 };
 732
 733 struct fuse_dirent {
 734         uint64_t        ino;
 735         uint64_t        off;
 736         uint32_t        namelen;
 737         uint32_t        type;
 738         char name[];
 739 };
 740
 741 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
 742 #define FUSE_DIRENT_ALIGN(x) \
 743         (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
 744 #define FUSE_DIRENT_SIZE(d) \
 745         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
 746
 747 struct fuse_direntplus {
 748         struct fuse_entry_out entry_out;
 749         struct fuse_dirent dirent;
 750 };
 751
 752 #define FUSE_NAME_OFFSET_DIRENTPLUS \
 753         offsetof(struct fuse_direntplus, dirent.name)
 754 #define FUSE_DIRENTPLUS_SIZE(d) \
 755         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
 756
 757 struct fuse_notify_inval_inode_out {
 758         uint64_t        ino;
 759         int64_t         off;
 760         int64_t         len;
 761 };
 762
 763 struct fuse_notify_inval_entry_out {
 764         uint64_t        parent;
 765         uint32_t        namelen;
 766         uint32_t        padding;
 767 };
 768
 769 struct fuse_notify_delete_out {
 770         uint64_t        parent;
 771         uint64_t        child;
 772         uint32_t        namelen;
 773         uint32_t        padding;
 774 };
 775
 776 struct fuse_notify_store_out {
 777         uint64_t        nodeid;
 778         uint64_t        offset;
 779         uint32_t        size;
 780         uint32_t        padding;
 781 };
 782
 783 struct fuse_notify_retrieve_out {
 784         uint64_t        notify_unique;
 785         uint64_t        nodeid;
 786         uint64_t        offset;
 787         uint32_t        size;
 788         uint32_t        padding;
 789 };
 790
 791 /* Matches the size of fuse_write_in */
 792 struct fuse_notify_retrieve_in {
 793         uint64_t        dummy1;
 794         uint64_t        offset;
 795         uint32_t        size;
 796         uint32_t        dummy2;
 797         uint64_t        dummy3;
 798         uint64_t        dummy4;
 799 };
 800
 801 /* Device ioctls: */
 802 #define FUSE_DEV_IOC_CLONE      _IOR(229, 0, uint32_t)
 803
 804 struct fuse_lseek_in {
 805         uint64_t        fh;
 806         uint64_t        offset;
 807         uint32_t        whence;
 808         uint32_t        padding;
 809 };
 810
 811 struct fuse_lseek_out {
 812         uint64_t        offset;
 813 };
 814
 815 struct fuse_copy_file_range_in {
 816         uint64_t        fh_in;
 817         uint64_t        off_in;
 818         uint64_t        nodeid_out;
 819         uint64_t        fh_out;
 820         uint64_t        off_out;
 821         uint64_t        len;
 822         uint64_t        flags;
 823 };
 824
 825 #endif /* _LINUX_FUSE_H */