include/fuse_kernel.h

   1 /*
   2     This file defines the kernel interface of FUSE
   3     Copyright (C) 2001-2008  Miklos Szeredi <miklos@szeredi.hu>
   4
   5     This program can be distributed under the terms of the GNU GPL.
   6     See the file COPYING.
   7
   8     This -- and only this -- header file may also be distributed under
   9     the terms of the BSD Licence as follows:
  10
  11     Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
  12
  13     Redistribution and use in source and binary forms, with or without
  14     modification, are permitted provided that the following conditions
  15     are met:
  16     1. Redistributions of source code must retain the above copyright
  17        notice, this list of conditions and the following disclaimer.
  18     2. Redistributions in binary form must reproduce the above copyright
  19        notice, this list of conditions and the following disclaimer in the
  20        documentation and/or other materials provided with the distribution.
  21
  22     THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25     ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
  26     FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32     SUCH DAMAGE.
  33 */
  34
  35 /*
  36  * This file defines the kernel interface of FUSE
  37  *
  38  * Protocol changelog:
  39  *
  40  * 7.9:
  41  *  - new fuse_getattr_in input argument of GETATTR
  42  *  - add lk_flags in fuse_lk_in
  43  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
  44  *  - add blksize field to fuse_attr
  45  *  - add file flags field to fuse_read_in and fuse_write_in
  46  *
  47  * 7.10
  48  *  - add nonseekable open flag
  49  *
  50  * 7.11
  51  *  - add IOCTL message
  52  *  - add unsolicited notification support
  53  *  - add POLL message and NOTIFY_POLL notification
  54  *
  55  * 7.12
  56  *  - add umask flag to input argument of open, mknod and mkdir
  57  *  - add notification messages for invalidation of inodes and
  58  *    directory entries
  59  *
  60  * 7.13
  61  *  - make max number of background requests and congestion threshold
  62  *    tunables
  63  *
  64  * 7.14
  65  *  - add splice support to fuse device
  66  *
  67  * 7.15
  68  *  - add store notify
  69  *  - add retrieve notify
  70  *
  71  * 7.16
  72  *  - add BATCH_FORGET request
  73  *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
  74  *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
  75  *  - add FUSE_IOCTL_32BIT flag
  76  *
  77  * 7.17
  78  *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
  79  *
  80  * 7.18
  81  *  - add FUSE_IOCTL_DIR flag
  82  *  - add FUSE_NOTIFY_DELETE
  83  *
  84  * 7.19
  85  *  - add FUSE_FALLOCATE
  86  *
  87  * 7.20
  88  *  - add FUSE_AUTO_INVAL_DATA
  89  *
  90  * 7.21
  91  *  - add FUSE_READDIRPLUS
  92  *  - send the requested events in POLL request
  93  *
  94  * 7.22
  95  *  - add FUSE_ASYNC_DIO
  96  *
  97  * 7.23
  98  *  - add FUSE_WRITEBACK_CACHE
  99  *  - add time_gran to fuse_init_out
 100  *  - add reserved space to fuse_init_out
 101  *  - add FATTR_CTIME
 102  *  - add ctime and ctimensec to fuse_setattr_in
 103  *  - add FUSE_RENAME2 request
 104  *  - add FUSE_NO_OPEN_SUPPORT flag
 105  */
 106
 107 #ifndef _LINUX_FUSE_H
 108 #define _LINUX_FUSE_H
 109
 110 #ifdef __KERNEL__
 111 #include <linux/types.h>
 112 #else
 113 #include <stdint.h>
 114 #endif
 115
 116 /*
 117  * Version negotiation:
 118  *
 119  * Both the kernel and userspace send the version they support in the
 120  * INIT request and reply respectively.
 121  *
 122  * If the major versions match then both shall use the smallest
 123  * of the two minor versions for communication.
 124  *
 125  * If the kernel supports a larger major version, then userspace shall
 126  * reply with the major version it supports, ignore the rest of the
 127  * INIT message and expect a new INIT message from the kernel with a
 128  * matching major version.
 129  *
 130  * If the library supports a larger major version, then it shall fall
 131  * back to the major protocol version sent by the kernel for
 132  * communication and reply with that major version (and an arbitrary
 133  * supported minor version).
 134  */
 135
 136 /** Version number of this interface */
 137 #define FUSE_KERNEL_VERSION 7
 138
 139 /** Minor version number of this interface */
 140 #define FUSE_KERNEL_MINOR_VERSION 23
 141
 142 /** The node ID of the root inode */
 143 #define FUSE_ROOT_ID 1
 144
 145 /* Make sure all structures are padded to 64bit boundary, so 32bit
 146    userspace works under 64bit kernels */
 147
 148 struct fuse_attr {
 149         uint64_t        ino;
 150         uint64_t        size;
 151         uint64_t        blocks;
 152         uint64_t        atime;
 153         uint64_t        mtime;
 154         uint64_t        ctime;
 155         uint32_t        atimensec;
 156         uint32_t        mtimensec;
 157         uint32_t        ctimensec;
 158         uint32_t        mode;
 159         uint32_t        nlink;
 160         uint32_t        uid;
 161         uint32_t        gid;
 162         uint32_t        rdev;
 163         uint32_t        blksize;
 164         uint32_t        padding;
 165 };
 166
 167 struct fuse_kstatfs {
 168         uint64_t        blocks;
 169         uint64_t        bfree;
 170         uint64_t        bavail;
 171         uint64_t        files;
 172         uint64_t        ffree;
 173         uint32_t        bsize;
 174         uint32_t        namelen;
 175         uint32_t        frsize;
 176         uint32_t        padding;
 177         uint32_t        spare[6];
 178 };
 179
 180 struct fuse_file_lock {
 181         uint64_t        start;
 182         uint64_t        end;
 183         uint32_t        type;
 184         uint32_t        pid; /* tgid */
 185 };
 186
 187 /**
 188  * Bitmasks for fuse_setattr_in.valid
 189  */
 190 #define FATTR_MODE      (1 << 0)
 191 #define FATTR_UID       (1 << 1)
 192 #define FATTR_GID       (1 << 2)
 193 #define FATTR_SIZE      (1 << 3)
 194 #define FATTR_ATIME     (1 << 4)
 195 #define FATTR_MTIME     (1 << 5)
 196 #define FATTR_FH        (1 << 6)
 197 #define FATTR_ATIME_NOW (1 << 7)
 198 #define FATTR_MTIME_NOW (1 << 8)
 199 #define FATTR_LOCKOWNER (1 << 9)
 200 #define FATTR_CTIME     (1 << 10)
 201
 202 /**
 203  * Flags returned by the OPEN request
 204  *
 205  * FOPEN_DIRECT_IO: bypass page cache for this open file
 206  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
 207  * FOPEN_NONSEEKABLE: the file is not seekable
 208  */
 209 #define FOPEN_DIRECT_IO         (1 << 0)
 210 #define FOPEN_KEEP_CACHE        (1 << 1)
 211 #define FOPEN_NONSEEKABLE       (1 << 2)
 212
 213 /**
 214  * INIT request/reply flags
 215  *
 216  * FUSE_ASYNC_READ: asynchronous read requests
 217  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
 218  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
 219  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
 220  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
 221  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
 222  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
 223  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
 224  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
 225  * FUSE_SPLICE_READ: kernel supports splice read on the device
 226  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
 227  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
 228  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
 229  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
 230  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
 231  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
 232  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
 233  * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
 234  */
 235 #define FUSE_ASYNC_READ         (1 << 0)
 236 #define FUSE_POSIX_LOCKS        (1 << 1)
 237 #define FUSE_FILE_OPS           (1 << 2)
 238 #define FUSE_ATOMIC_O_TRUNC     (1 << 3)
 239 #define FUSE_EXPORT_SUPPORT     (1 << 4)
 240 #define FUSE_BIG_WRITES         (1 << 5)
 241 #define FUSE_DONT_MASK          (1 << 6)
 242 #define FUSE_SPLICE_WRITE       (1 << 7)
 243 #define FUSE_SPLICE_MOVE        (1 << 8)
 244 #define FUSE_SPLICE_READ        (1 << 9)
 245 #define FUSE_FLOCK_LOCKS        (1 << 10)
 246 #define FUSE_HAS_IOCTL_DIR      (1 << 11)
 247 #define FUSE_AUTO_INVAL_DATA    (1 << 12)
 248 #define FUSE_DO_READDIRPLUS     (1 << 13)
 249 #define FUSE_READDIRPLUS_AUTO   (1 << 14)
 250 #define FUSE_ASYNC_DIO          (1 << 15)
 251 #define FUSE_WRITEBACK_CACHE    (1 << 16)
 252 #define FUSE_NO_OPEN_SUPPORT    (1 << 17)
 253
 254 /**
 255  * CUSE INIT request/reply flags
 256  *
 257  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
 258  */
 259 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
 260
 261 /**
 262  * Release flags
 263  */
 264 #define FUSE_RELEASE_FLUSH      (1 << 0)
 265 #define FUSE_RELEASE_FLOCK_UNLOCK       (1 << 1)
 266
 267 /**
 268  * Getattr flags
 269  */
 270 #define FUSE_GETATTR_FH         (1 << 0)
 271
 272 /**
 273  * Lock flags
 274  */
 275 #define FUSE_LK_FLOCK           (1 << 0)
 276
 277 /**
 278  * WRITE flags
 279  *
 280  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
 281  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
 282  */
 283 #define FUSE_WRITE_CACHE        (1 << 0)
 284 #define FUSE_WRITE_LOCKOWNER    (1 << 1)
 285
 286 /**
 287  * Read flags
 288  */
 289 #define FUSE_READ_LOCKOWNER     (1 << 1)
 290
 291 /**
 292  * Ioctl flags
 293  *
 294  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
 295  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
 296  * FUSE_IOCTL_RETRY: retry with new iovecs
 297  * FUSE_IOCTL_32BIT: 32bit ioctl
 298  * FUSE_IOCTL_DIR: is a directory
 299  *
 300  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
 301  */
 302 #define FUSE_IOCTL_COMPAT       (1 << 0)
 303 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
 304 #define FUSE_IOCTL_RETRY        (1 << 2)
 305 #define FUSE_IOCTL_32BIT        (1 << 3)
 306 #define FUSE_IOCTL_DIR          (1 << 4)
 307
 308 #define FUSE_IOCTL_MAX_IOV      256
 309
 310 /**
 311  * Poll flags
 312  *
 313  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
 314  */
 315 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 316
 317 enum fuse_opcode {
 318         FUSE_LOOKUP        = 1,
 319         FUSE_FORGET        = 2,  /* no reply */
 320         FUSE_GETATTR       = 3,
 321         FUSE_SETATTR       = 4,
 322         FUSE_READLINK      = 5,
 323         FUSE_SYMLINK       = 6,
 324         FUSE_MKNOD         = 8,
 325         FUSE_MKDIR         = 9,
 326         FUSE_UNLINK        = 10,
 327         FUSE_RMDIR         = 11,
 328         FUSE_RENAME        = 12,
 329         FUSE_LINK          = 13,
 330         FUSE_OPEN          = 14,
 331         FUSE_READ          = 15,
 332         FUSE_WRITE         = 16,
 333         FUSE_STATFS        = 17,
 334         FUSE_RELEASE       = 18,
 335         FUSE_FSYNC         = 20,
 336         FUSE_SETXATTR      = 21,
 337         FUSE_GETXATTR      = 22,
 338         FUSE_LISTXATTR     = 23,
 339         FUSE_REMOVEXATTR   = 24,
 340         FUSE_FLUSH         = 25,
 341         FUSE_INIT          = 26,
 342         FUSE_OPENDIR       = 27,
 343         FUSE_READDIR       = 28,
 344         FUSE_RELEASEDIR    = 29,
 345         FUSE_FSYNCDIR      = 30,
 346         FUSE_GETLK         = 31,
 347         FUSE_SETLK         = 32,
 348         FUSE_SETLKW        = 33,
 349         FUSE_ACCESS        = 34,
 350         FUSE_CREATE        = 35,
 351         FUSE_INTERRUPT     = 36,
 352         FUSE_BMAP          = 37,
 353         FUSE_DESTROY       = 38,
 354         FUSE_IOCTL         = 39,
 355         FUSE_POLL          = 40,
 356         FUSE_NOTIFY_REPLY  = 41,
 357         FUSE_BATCH_FORGET  = 42,
 358         FUSE_FALLOCATE     = 43,
 359         FUSE_READDIRPLUS   = 44,
 360         FUSE_RENAME2       = 45,
 361
 362         /* CUSE specific operations */
 363         CUSE_INIT          = 4096,
 364 };
 365
 366 enum fuse_notify_code {
 367         FUSE_NOTIFY_POLL   = 1,
 368         FUSE_NOTIFY_INVAL_INODE = 2,
 369         FUSE_NOTIFY_INVAL_ENTRY = 3,
 370         FUSE_NOTIFY_STORE = 4,
 371         FUSE_NOTIFY_RETRIEVE = 5,
 372         FUSE_NOTIFY_DELETE = 6,
 373         FUSE_NOTIFY_CODE_MAX,
 374 };
 375
 376 /* The read buffer is required to be at least 8k, but may be much larger */
 377 #define FUSE_MIN_READ_BUFFER 8192
 378
 379 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
 380
 381 struct fuse_entry_out {
 382         uint64_t        nodeid;         /* Inode ID */
 383         uint64_t        generation;     /* Inode generation: nodeid:gen must
 384                                            be unique for the fs's lifetime */
 385         uint64_t        entry_valid;    /* Cache timeout for the name */
 386         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 387         uint32_t        entry_valid_nsec;
 388         uint32_t        attr_valid_nsec;
 389         struct fuse_attr attr;
 390 };
 391
 392 struct fuse_forget_in {
 393         uint64_t        nlookup;
 394 };
 395
 396 struct fuse_forget_one {
 397         uint64_t        nodeid;
 398         uint64_t        nlookup;
 399 };
 400
 401 struct fuse_batch_forget_in {
 402         uint32_t        count;
 403         uint32_t        dummy;
 404 };
 405
 406 struct fuse_getattr_in {
 407         uint32_t        getattr_flags;
 408         uint32_t        dummy;
 409         uint64_t        fh;
 410 };
 411
 412 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
 413
 414 struct fuse_attr_out {
 415         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 416         uint32_t        attr_valid_nsec;
 417         uint32_t        dummy;
 418         struct fuse_attr attr;
 419 };
 420
 421 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
 422
 423 struct fuse_mknod_in {
 424         uint32_t        mode;
 425         uint32_t        rdev;
 426         uint32_t        umask;
 427         uint32_t        padding;
 428 };
 429
 430 struct fuse_mkdir_in {
 431         uint32_t        mode;
 432         uint32_t        umask;
 433 };
 434
 435 struct fuse_rename_in {
 436         uint64_t        newdir;
 437 };
 438
 439 struct fuse_rename2_in {
 440         uint64_t        newdir;
 441         uint32_t        flags;
 442         uint32_t        padding;
 443 };
 444
 445 struct fuse_link_in {
 446         uint64_t        oldnodeid;
 447 };
 448
 449 struct fuse_setattr_in {
 450         uint32_t        valid;
 451         uint32_t        padding;
 452         uint64_t        fh;
 453         uint64_t        size;
 454         uint64_t        lock_owner;
 455         uint64_t        atime;
 456         uint64_t        mtime;
 457         uint64_t        ctime;
 458         uint32_t        atimensec;
 459         uint32_t        mtimensec;
 460         uint32_t        ctimensec;
 461         uint32_t        mode;
 462         uint32_t        unused4;
 463         uint32_t        uid;
 464         uint32_t        gid;
 465         uint32_t        unused5;
 466 };
 467
 468 struct fuse_open_in {
 469         uint32_t        flags;
 470         uint32_t        unused;
 471 };
 472
 473 struct fuse_create_in {
 474         uint32_t        flags;
 475         uint32_t        mode;
 476         uint32_t        umask;
 477         uint32_t        padding;
 478 };
 479
 480 struct fuse_open_out {
 481         uint64_t        fh;
 482         uint32_t        open_flags;
 483         uint32_t        padding;
 484 };
 485
 486 struct fuse_release_in {
 487         uint64_t        fh;
 488         uint32_t        flags;
 489         uint32_t        release_flags;
 490         uint64_t        lock_owner;
 491 };
 492
 493 struct fuse_flush_in {
 494         uint64_t        fh;
 495         uint32_t        unused;
 496         uint32_t        padding;
 497         uint64_t        lock_owner;
 498 };
 499
 500 struct fuse_read_in {
 501         uint64_t        fh;
 502         uint64_t        offset;
 503         uint32_t        size;
 504         uint32_t        read_flags;
 505         uint64_t        lock_owner;
 506         uint32_t        flags;
 507         uint32_t        padding;
 508 };
 509
 510 #define FUSE_COMPAT_WRITE_IN_SIZE 24
 511
 512 struct fuse_write_in {
 513         uint64_t        fh;
 514         uint64_t        offset;
 515         uint32_t        size;
 516         uint32_t        write_flags;
 517         uint64_t        lock_owner;
 518         uint32_t        flags;
 519         uint32_t        padding;
 520 };
 521
 522 struct fuse_write_out {
 523         uint32_t        size;
 524         uint32_t        padding;
 525 };
 526
 527 #define FUSE_COMPAT_STATFS_SIZE 48
 528
 529 struct fuse_statfs_out {
 530         struct fuse_kstatfs st;
 531 };
 532
 533 struct fuse_fsync_in {
 534         uint64_t        fh;
 535         uint32_t        fsync_flags;
 536         uint32_t        padding;
 537 };
 538
 539 struct fuse_setxattr_in {
 540         uint32_t        size;
 541         uint32_t        flags;
 542 };
 543
 544 struct fuse_getxattr_in {
 545         uint32_t        size;
 546         uint32_t        padding;
 547 };
 548
 549 struct fuse_getxattr_out {
 550         uint32_t        size;
 551         uint32_t        padding;
 552 };
 553
 554 struct fuse_lk_in {
 555         uint64_t        fh;
 556         uint64_t        owner;
 557         struct fuse_file_lock lk;
 558         uint32_t        lk_flags;
 559         uint32_t        padding;
 560 };
 561
 562 struct fuse_lk_out {
 563         struct fuse_file_lock lk;
 564 };
 565
 566 struct fuse_access_in {
 567         uint32_t        mask;
 568         uint32_t        padding;
 569 };
 570
 571 struct fuse_init_in {
 572         uint32_t        major;
 573         uint32_t        minor;
 574         uint32_t        max_readahead;
 575         uint32_t        flags;
 576 };
 577
 578 #define FUSE_COMPAT_INIT_OUT_SIZE 8
 579 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
 580
 581 struct fuse_init_out {
 582         uint32_t        major;
 583         uint32_t        minor;
 584         uint32_t        max_readahead;
 585         uint32_t        flags;
 586         uint16_t        max_background;
 587         uint16_t        congestion_threshold;
 588         uint32_t        max_write;
 589         uint32_t        time_gran;
 590         uint32_t        unused[9];
 591 };
 592
 593 #define CUSE_INIT_INFO_MAX 4096
 594
 595 struct cuse_init_in {
 596         uint32_t        major;
 597         uint32_t        minor;
 598         uint32_t        unused;
 599         uint32_t        flags;
 600 };
 601
 602 struct cuse_init_out {
 603         uint32_t        major;
 604         uint32_t        minor;
 605         uint32_t        unused;
 606         uint32_t        flags;
 607         uint32_t        max_read;
 608         uint32_t        max_write;
 609         uint32_t        dev_major;              /* chardev major */
 610         uint32_t        dev_minor;              /* chardev minor */
 611         uint32_t        spare[10];
 612 };
 613
 614 struct fuse_interrupt_in {
 615         uint64_t        unique;
 616 };
 617
 618 struct fuse_bmap_in {
 619         uint64_t        block;
 620         uint32_t        blocksize;
 621         uint32_t        padding;
 622 };
 623
 624 struct fuse_bmap_out {
 625         uint64_t        block;
 626 };
 627
 628 struct fuse_ioctl_in {
 629         uint64_t        fh;
 630         uint32_t        flags;
 631         uint32_t        cmd;
 632         uint64_t        arg;
 633         uint32_t        in_size;
 634         uint32_t        out_size;
 635 };
 636
 637 struct fuse_ioctl_iovec {
 638         uint64_t        base;
 639         uint64_t        len;
 640 };
 641
 642 struct fuse_ioctl_out {
 643         int32_t         result;
 644         uint32_t        flags;
 645         uint32_t        in_iovs;
 646         uint32_t        out_iovs;
 647 };
 648
 649 struct fuse_poll_in {
 650         uint64_t        fh;
 651         uint64_t        kh;
 652         uint32_t        flags;
 653         uint32_t        events;
 654 };
 655
 656 struct fuse_poll_out {
 657         uint32_t        revents;
 658         uint32_t        padding;
 659 };
 660
 661 struct fuse_notify_poll_wakeup_out {
 662         uint64_t        kh;
 663 };
 664
 665 struct fuse_fallocate_in {
 666         uint64_t        fh;
 667         uint64_t        offset;
 668         uint64_t        length;
 669         uint32_t        mode;
 670         uint32_t        padding;
 671 };
 672
 673 struct fuse_in_header {
 674         uint32_t        len;
 675         uint32_t        opcode;
 676         uint64_t        unique;
 677         uint64_t        nodeid;
 678         uint32_t        uid;
 679         uint32_t        gid;
 680         uint32_t        pid;
 681         uint32_t        padding;
 682 };
 683
 684 struct fuse_out_header {
 685         uint32_t        len;
 686         int32_t         error;
 687         uint64_t        unique;
 688 };
 689
 690 struct fuse_dirent {
 691         uint64_t        ino;
 692         uint64_t        off;
 693         uint32_t        namelen;
 694         uint32_t        type;
 695         char name[];
 696 };
 697
 698 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
 699 #define FUSE_DIRENT_ALIGN(x) \
 700         (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
 701 #define FUSE_DIRENT_SIZE(d) \
 702         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
 703
 704 struct fuse_direntplus {
 705         struct fuse_entry_out entry_out;
 706         struct fuse_dirent dirent;
 707 };
 708
 709 #define FUSE_NAME_OFFSET_DIRENTPLUS \
 710         offsetof(struct fuse_direntplus, dirent.name)
 711 #define FUSE_DIRENTPLUS_SIZE(d) \
 712         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
 713
 714 struct fuse_notify_inval_inode_out {
 715         uint64_t        ino;
 716         int64_t         off;
 717         int64_t         len;
 718 };
 719
 720 struct fuse_notify_inval_entry_out {
 721         uint64_t        parent;
 722         uint32_t        namelen;
 723         uint32_t        padding;
 724 };
 725
 726 struct fuse_notify_delete_out {
 727         uint64_t        parent;
 728         uint64_t        child;
 729         uint32_t        namelen;
 730         uint32_t        padding;
 731 };
 732
 733 struct fuse_notify_store_out {
 734         uint64_t        nodeid;
 735         uint64_t        offset;
 736         uint32_t        size;
 737         uint32_t        padding;
 738 };
 739
 740 struct fuse_notify_retrieve_out {
 741         uint64_t        notify_unique;
 742         uint64_t        nodeid;
 743         uint64_t        offset;
 744         uint32_t        size;
 745         uint32_t        padding;
 746 };
 747
 748 /* Matches the size of fuse_write_in */
 749 struct fuse_notify_retrieve_in {
 750         uint64_t        dummy1;
 751         uint64_t        offset;
 752         uint32_t        size;
 753         uint32_t        dummy2;
 754         uint64_t        dummy3;
 755         uint64_t        dummy4;
 756 };
 757
 758 /* Device ioctls: */
 759 #define FUSE_DEV_IOC_CLONE      _IOR(229, 0, uint32_t)
 760
 761 #endif /* _LINUX_FUSE_H */