include/standard-headers/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  * 7.1:
  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,
  47  *      FUSE_RELEASEDIR
  48  *  - add padding to messages to accommodate 32-bit servers on 64-bit kernels
  49  *
  50  * 7.2:
  51  *  - add FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE flags
  52  *  - add FUSE_FSYNCDIR message
  53  *
  54  * 7.3:
  55  *  - add FUSE_ACCESS message
  56  *  - add FUSE_CREATE message
  57  *  - add filehandle to fuse_setattr_in
  58  *
  59  * 7.4:
  60  *  - add frsize to fuse_kstatfs
  61  *  - clean up request size limit checking
  62  *
  63  * 7.5:
  64  *  - add flags and max_write to fuse_init_out
  65  *
  66  * 7.6:
  67  *  - add max_readahead to fuse_init_in and fuse_init_out
  68  *
  69  * 7.7:
  70  *  - add FUSE_INTERRUPT message
  71  *  - add POSIX file lock support
  72  *
  73  * 7.8:
  74  *  - add lock_owner and flags fields to fuse_release_in
  75  *  - add FUSE_BMAP message
  76  *  - add FUSE_DESTROY message
  77  *
  78  * 7.9:
  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
  85  *
  86  * 7.10
  87  *  - add nonseekable open flag
  88  *
  89  * 7.11
  90  *  - add IOCTL message
  91  *  - add unsolicited notification support
  92  *  - add POLL message and NOTIFY_POLL notification
  93  *
  94  * 7.12
  95  *  - add umask flag to input argument of create, mknod and mkdir
  96  *  - add notification messages for invalidation of inodes and
  97  *    directory entries
  98  *
  99  * 7.13
 100  *  - make max number of background requests and congestion threshold
 101  *    tunables
 102  *
 103  * 7.14
 104  *  - add splice support to fuse device
 105  *
 106  * 7.15
 107  *  - add store notify
 108  *  - add retrieve notify
 109  *
 110  * 7.16
 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
 115  *
 116  * 7.17
 117  *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
 118  *
 119  * 7.18
 120  *  - add FUSE_IOCTL_DIR flag
 121  *  - add FUSE_NOTIFY_DELETE
 122  *
 123  * 7.19
 124  *  - add FUSE_FALLOCATE
 125  *
 126  * 7.20
 127  *  - add FUSE_AUTO_INVAL_DATA
 128  *
 129  * 7.21
 130  *  - add FUSE_READDIRPLUS
 131  *  - send the requested events in POLL request
 132  *
 133  * 7.22
 134  *  - add FUSE_ASYNC_DIO
 135  *
 136  * 7.23
 137  *  - add FUSE_WRITEBACK_CACHE
 138  *  - add time_gran to fuse_init_out
 139  *  - add reserved space to fuse_init_out
 140  *  - add FATTR_CTIME
 141  *  - add ctime and ctimensec to fuse_setattr_in
 142  *  - add FUSE_RENAME2 request
 143  *  - add FUSE_NO_OPEN_SUPPORT flag
 144  *
 145  *  7.24
 146  *  - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
 147  *
 148  *  7.25
 149  *  - add FUSE_PARALLEL_DIROPS
 150  *
 151  *  7.26
 152  *  - add FUSE_HANDLE_KILLPRIV
 153  *  - add FUSE_POSIX_ACL
 154  *
 155  *  7.27
 156  *  - add FUSE_ABORT_ERROR
 157  *
 158  *  7.28
 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
 163  *
 164  *  7.29
 165  *  - add FUSE_NO_OPENDIR_SUPPORT flag
 166  *
 167  *  7.30
 168  *  - add FUSE_EXPLICIT_INVAL_DATA
 169  *  - add FUSE_IOCTL_COMPAT_X32
 170  *
 171  *  7.31
 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
 175  *
 176  *  7.32
 177  *  - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS
 178  *
 179  *  7.33
 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
 184  *
 185  *  7.34
 186  *  - add FUSE_SYNCFS
 187  */
 188
 189 #ifndef _LINUX_FUSE_H
 190 #define _LINUX_FUSE_H
 191
 192 #include <stdint.h>
 193
 194 /*
 195  * Version negotiation:
 196  *
 197  * Both the kernel and userspace send the version they support in the
 198  * INIT request and reply respectively.
 199  *
 200  * If the major versions match then both shall use the smallest
 201  * of the two minor versions for communication.
 202  *
 203  * If the kernel supports a larger major version, then userspace shall
 204  * reply with the major version it supports, ignore the rest of the
 205  * INIT message and expect a new INIT message from the kernel with a
 206  * matching major version.
 207  *
 208  * If the library supports a larger major version, then it shall fall
 209  * back to the major protocol version sent by the kernel for
 210  * communication and reply with that major version (and an arbitrary
 211  * supported minor version).
 212  */
 213
 214 /** Version number of this interface */
 215 #define FUSE_KERNEL_VERSION 7
 216
 217 /** Minor version number of this interface */
 218 #define FUSE_KERNEL_MINOR_VERSION 34
 219
 220 /** The node ID of the root inode */
 221 #define FUSE_ROOT_ID 1
 222
 223 /* Make sure all structures are padded to 64bit boundary, so 32bit
 224    userspace works under 64bit kernels */
 225
 226 struct fuse_attr {
 227         uint64_t        ino;
 228         uint64_t        size;
 229         uint64_t        blocks;
 230         uint64_t        atime;
 231         uint64_t        mtime;
 232         uint64_t        ctime;
 233         uint32_t        atimensec;
 234         uint32_t        mtimensec;
 235         uint32_t        ctimensec;
 236         uint32_t        mode;
 237         uint32_t        nlink;
 238         uint32_t        uid;
 239         uint32_t        gid;
 240         uint32_t        rdev;
 241         uint32_t        blksize;
 242         uint32_t        flags;
 243 };
 244
 245 struct fuse_kstatfs {
 246         uint64_t        blocks;
 247         uint64_t        bfree;
 248         uint64_t        bavail;
 249         uint64_t        files;
 250         uint64_t        ffree;
 251         uint32_t        bsize;
 252         uint32_t        namelen;
 253         uint32_t        frsize;
 254         uint32_t        padding;
 255         uint32_t        spare[6];
 256 };
 257
 258 struct fuse_file_lock {
 259         uint64_t        start;
 260         uint64_t        end;
 261         uint32_t        type;
 262         uint32_t        pid; /* tgid */
 263 };
 264
 265 /**
 266  * Bitmasks for fuse_setattr_in.valid
 267  */
 268 #define FATTR_MODE      (1 << 0)
 269 #define FATTR_UID       (1 << 1)
 270 #define FATTR_GID       (1 << 2)
 271 #define FATTR_SIZE      (1 << 3)
 272 #define FATTR_ATIME     (1 << 4)
 273 #define FATTR_MTIME     (1 << 5)
 274 #define FATTR_FH        (1 << 6)
 275 #define FATTR_ATIME_NOW (1 << 7)
 276 #define FATTR_MTIME_NOW (1 << 8)
 277 #define FATTR_LOCKOWNER (1 << 9)
 278 #define FATTR_CTIME     (1 << 10)
 279 #define FATTR_KILL_SUIDGID      (1 << 11)
 280
 281 /**
 282  * Flags returned by the OPEN request
 283  *
 284  * FOPEN_DIRECT_IO: bypass page cache for this open file
 285  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
 286  * FOPEN_NONSEEKABLE: the file is not seekable
 287  * FOPEN_CACHE_DIR: allow caching this directory
 288  * FOPEN_STREAM: the file is stream-like (no file position at all)
 289  */
 290 #define FOPEN_DIRECT_IO         (1 << 0)
 291 #define FOPEN_KEEP_CACHE        (1 << 1)
 292 #define FOPEN_NONSEEKABLE       (1 << 2)
 293 #define FOPEN_CACHE_DIR         (1 << 3)
 294 #define FOPEN_STREAM            (1 << 4)
 295
 296 /**
 297  * INIT request/reply flags
 298  *
 299  * FUSE_ASYNC_READ: asynchronous read requests
 300  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
 301  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
 302  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
 303  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
 304  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
 305  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
 306  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
 307  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
 308  * FUSE_SPLICE_READ: kernel supports splice read on the device
 309  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
 310  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
 311  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
 312  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
 313  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
 314  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
 315  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
 316  * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens
 317  * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir
 318  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
 319  * FUSE_POSIX_ACL: filesystem supports posix acls
 320  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
 321  * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
 322  * FUSE_CACHE_SYMLINKS: cache READLINK responses
 323  * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
 324  * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
 325  * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for
 326  *                     foffset and moffset fields in struct
 327  *                     fuse_setupmapping_out and fuse_removemapping_one.
 328  * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts
 329  * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc.
 330  *                      Upon write/truncate suid/sgid is only killed if caller
 331  *                      does not have CAP_FSETID. Additionally upon
 332  *                      write/truncate sgid is killed only if file has group
 333  *                      execute permission. (Same as Linux VFS behavior).
 334  * FUSE_SETXATTR_EXT:   Server supports extended struct fuse_setxattr_in
 335  */
 336 #define FUSE_ASYNC_READ         (1 << 0)
 337 #define FUSE_POSIX_LOCKS        (1 << 1)
 338 #define FUSE_FILE_OPS           (1 << 2)
 339 #define FUSE_ATOMIC_O_TRUNC     (1 << 3)
 340 #define FUSE_EXPORT_SUPPORT     (1 << 4)
 341 #define FUSE_BIG_WRITES         (1 << 5)
 342 #define FUSE_DONT_MASK          (1 << 6)
 343 #define FUSE_SPLICE_WRITE       (1 << 7)
 344 #define FUSE_SPLICE_MOVE        (1 << 8)
 345 #define FUSE_SPLICE_READ        (1 << 9)
 346 #define FUSE_FLOCK_LOCKS        (1 << 10)
 347 #define FUSE_HAS_IOCTL_DIR      (1 << 11)
 348 #define FUSE_AUTO_INVAL_DATA    (1 << 12)
 349 #define FUSE_DO_READDIRPLUS     (1 << 13)
 350 #define FUSE_READDIRPLUS_AUTO   (1 << 14)
 351 #define FUSE_ASYNC_DIO          (1 << 15)
 352 #define FUSE_WRITEBACK_CACHE    (1 << 16)
 353 #define FUSE_NO_OPEN_SUPPORT    (1 << 17)
 354 #define FUSE_PARALLEL_DIROPS    (1 << 18)
 355 #define FUSE_HANDLE_KILLPRIV    (1 << 19)
 356 #define FUSE_POSIX_ACL          (1 << 20)
 357 #define FUSE_ABORT_ERROR        (1 << 21)
 358 #define FUSE_MAX_PAGES          (1 << 22)
 359 #define FUSE_CACHE_SYMLINKS     (1 << 23)
 360 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
 361 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
 362 #define FUSE_MAP_ALIGNMENT      (1 << 26)
 363 #define FUSE_SUBMOUNTS          (1 << 27)
 364 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
 365 #define FUSE_SETXATTR_EXT       (1 << 29)
 366
 367 /**
 368  * CUSE INIT request/reply flags
 369  *
 370  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
 371  */
 372 #define CUSE_UNRESTRICTED_IOCTL (1 << 0)
 373
 374 /**
 375  * Release flags
 376  */
 377 #define FUSE_RELEASE_FLUSH      (1 << 0)
 378 #define FUSE_RELEASE_FLOCK_UNLOCK       (1 << 1)
 379
 380 /**
 381  * Getattr flags
 382  */
 383 #define FUSE_GETATTR_FH         (1 << 0)
 384
 385 /**
 386  * Lock flags
 387  */
 388 #define FUSE_LK_FLOCK           (1 << 0)
 389
 390 /**
 391  * WRITE flags
 392  *
 393  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
 394  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
 395  * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits
 396  */
 397 #define FUSE_WRITE_CACHE        (1 << 0)
 398 #define FUSE_WRITE_LOCKOWNER    (1 << 1)
 399 #define FUSE_WRITE_KILL_SUIDGID (1 << 2)
 400
 401 /* Obsolete alias; this flag implies killing suid/sgid only. */
 402 #define FUSE_WRITE_KILL_PRIV    FUSE_WRITE_KILL_SUIDGID
 403
 404 /**
 405  * Read flags
 406  */
 407 #define FUSE_READ_LOCKOWNER     (1 << 1)
 408
 409 /**
 410  * Ioctl flags
 411  *
 412  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
 413  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
 414  * FUSE_IOCTL_RETRY: retry with new iovecs
 415  * FUSE_IOCTL_32BIT: 32bit ioctl
 416  * FUSE_IOCTL_DIR: is a directory
 417  * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
 418  *
 419  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
 420  */
 421 #define FUSE_IOCTL_COMPAT       (1 << 0)
 422 #define FUSE_IOCTL_UNRESTRICTED (1 << 1)
 423 #define FUSE_IOCTL_RETRY        (1 << 2)
 424 #define FUSE_IOCTL_32BIT        (1 << 3)
 425 #define FUSE_IOCTL_DIR          (1 << 4)
 426 #define FUSE_IOCTL_COMPAT_X32   (1 << 5)
 427
 428 #define FUSE_IOCTL_MAX_IOV      256
 429
 430 /**
 431  * Poll flags
 432  *
 433  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
 434  */
 435 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 436
 437 /**
 438  * Fsync flags
 439  *
 440  * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
 441  */
 442 #define FUSE_FSYNC_FDATASYNC    (1 << 0)
 443
 444 /**
 445  * fuse_attr flags
 446  *
 447  * FUSE_ATTR_SUBMOUNT: Object is a submount root
 448  */
 449 #define FUSE_ATTR_SUBMOUNT      (1 << 0)
 450
 451 /**
 452  * Open flags
 453  * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable
 454  */
 455 #define FUSE_OPEN_KILL_SUIDGID  (1 << 0)
 456
 457 /**
 458  * setxattr flags
 459  * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set
 460  */
 461 #define FUSE_SETXATTR_ACL_KILL_SGID     (1 << 0)
 462
 463 enum fuse_opcode {
 464         FUSE_LOOKUP             = 1,
 465         FUSE_FORGET             = 2,  /* no reply */
 466         FUSE_GETATTR            = 3,
 467         FUSE_SETATTR            = 4,
 468         FUSE_READLINK           = 5,
 469         FUSE_SYMLINK            = 6,
 470         FUSE_MKNOD              = 8,
 471         FUSE_MKDIR              = 9,
 472         FUSE_UNLINK             = 10,
 473         FUSE_RMDIR              = 11,
 474         FUSE_RENAME             = 12,
 475         FUSE_LINK               = 13,
 476         FUSE_OPEN               = 14,
 477         FUSE_READ               = 15,
 478         FUSE_WRITE              = 16,
 479         FUSE_STATFS             = 17,
 480         FUSE_RELEASE            = 18,
 481         FUSE_FSYNC              = 20,
 482         FUSE_SETXATTR           = 21,
 483         FUSE_GETXATTR           = 22,
 484         FUSE_LISTXATTR          = 23,
 485         FUSE_REMOVEXATTR        = 24,
 486         FUSE_FLUSH              = 25,
 487         FUSE_INIT               = 26,
 488         FUSE_OPENDIR            = 27,
 489         FUSE_READDIR            = 28,
 490         FUSE_RELEASEDIR         = 29,
 491         FUSE_FSYNCDIR           = 30,
 492         FUSE_GETLK              = 31,
 493         FUSE_SETLK              = 32,
 494         FUSE_SETLKW             = 33,
 495         FUSE_ACCESS             = 34,
 496         FUSE_CREATE             = 35,
 497         FUSE_INTERRUPT          = 36,
 498         FUSE_BMAP               = 37,
 499         FUSE_DESTROY            = 38,
 500         FUSE_IOCTL              = 39,
 501         FUSE_POLL               = 40,
 502         FUSE_NOTIFY_REPLY       = 41,
 503         FUSE_BATCH_FORGET       = 42,
 504         FUSE_FALLOCATE          = 43,
 505         FUSE_READDIRPLUS        = 44,
 506         FUSE_RENAME2            = 45,
 507         FUSE_LSEEK              = 46,
 508         FUSE_COPY_FILE_RANGE    = 47,
 509         FUSE_SETUPMAPPING       = 48,
 510         FUSE_REMOVEMAPPING      = 49,
 511         FUSE_SYNCFS             = 50,
 512
 513         /* CUSE specific operations */
 514         CUSE_INIT               = 4096,
 515
 516         /* Reserved opcodes: helpful to detect structure endian-ness */
 517         CUSE_INIT_BSWAP_RESERVED        = 1048576,      /* CUSE_INIT << 8 */
 518         FUSE_INIT_BSWAP_RESERVED        = 436207616,    /* FUSE_INIT << 24 */
 519 };
 520
 521 enum fuse_notify_code {
 522         FUSE_NOTIFY_POLL   = 1,
 523         FUSE_NOTIFY_INVAL_INODE = 2,
 524         FUSE_NOTIFY_INVAL_ENTRY = 3,
 525         FUSE_NOTIFY_STORE = 4,
 526         FUSE_NOTIFY_RETRIEVE = 5,
 527         FUSE_NOTIFY_DELETE = 6,
 528         FUSE_NOTIFY_CODE_MAX,
 529 };
 530
 531 /* The read buffer is required to be at least 8k, but may be much larger */
 532 #define FUSE_MIN_READ_BUFFER 8192
 533
 534 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
 535
 536 struct fuse_entry_out {
 537         uint64_t        nodeid;         /* Inode ID */
 538         uint64_t        generation;     /* Inode generation: nodeid:gen must
 539                                            be unique for the fs's lifetime */
 540         uint64_t        entry_valid;    /* Cache timeout for the name */
 541         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 542         uint32_t        entry_valid_nsec;
 543         uint32_t        attr_valid_nsec;
 544         struct fuse_attr attr;
 545 };
 546
 547 struct fuse_forget_in {
 548         uint64_t        nlookup;
 549 };
 550
 551 struct fuse_forget_one {
 552         uint64_t        nodeid;
 553         uint64_t        nlookup;
 554 };
 555
 556 struct fuse_batch_forget_in {
 557         uint32_t        count;
 558         uint32_t        dummy;
 559 };
 560
 561 struct fuse_getattr_in {
 562         uint32_t        getattr_flags;
 563         uint32_t        dummy;
 564         uint64_t        fh;
 565 };
 566
 567 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
 568
 569 struct fuse_attr_out {
 570         uint64_t        attr_valid;     /* Cache timeout for the attributes */
 571         uint32_t        attr_valid_nsec;
 572         uint32_t        dummy;
 573         struct fuse_attr attr;
 574 };
 575
 576 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
 577
 578 struct fuse_mknod_in {
 579         uint32_t        mode;
 580         uint32_t        rdev;
 581         uint32_t        umask;
 582         uint32_t        padding;
 583 };
 584
 585 struct fuse_mkdir_in {
 586         uint32_t        mode;
 587         uint32_t        umask;
 588 };
 589
 590 struct fuse_rename_in {
 591         uint64_t        newdir;
 592 };
 593
 594 struct fuse_rename2_in {
 595         uint64_t        newdir;
 596         uint32_t        flags;
 597         uint32_t        padding;
 598 };
 599
 600 struct fuse_link_in {
 601         uint64_t        oldnodeid;
 602 };
 603
 604 struct fuse_setattr_in {
 605         uint32_t        valid;
 606         uint32_t        padding;
 607         uint64_t        fh;
 608         uint64_t        size;
 609         uint64_t        lock_owner;
 610         uint64_t        atime;
 611         uint64_t        mtime;
 612         uint64_t        ctime;
 613         uint32_t        atimensec;
 614         uint32_t        mtimensec;
 615         uint32_t        ctimensec;
 616         uint32_t        mode;
 617         uint32_t        unused4;
 618         uint32_t        uid;
 619         uint32_t        gid;
 620         uint32_t        unused5;
 621 };
 622
 623 struct fuse_open_in {
 624         uint32_t        flags;
 625         uint32_t        open_flags;     /* FUSE_OPEN_... */
 626 };
 627
 628 struct fuse_create_in {
 629         uint32_t        flags;
 630         uint32_t        mode;
 631         uint32_t        umask;
 632         uint32_t        open_flags;     /* FUSE_OPEN_... */
 633 };
 634
 635 struct fuse_open_out {
 636         uint64_t        fh;
 637         uint32_t        open_flags;
 638         uint32_t        padding;
 639 };
 640
 641 struct fuse_release_in {
 642         uint64_t        fh;
 643         uint32_t        flags;
 644         uint32_t        release_flags;
 645         uint64_t        lock_owner;
 646 };
 647
 648 struct fuse_flush_in {
 649         uint64_t        fh;
 650         uint32_t        unused;
 651         uint32_t        padding;
 652         uint64_t        lock_owner;
 653 };
 654
 655 struct fuse_read_in {
 656         uint64_t        fh;
 657         uint64_t        offset;
 658         uint32_t        size;
 659         uint32_t        read_flags;
 660         uint64_t        lock_owner;
 661         uint32_t        flags;
 662         uint32_t        padding;
 663 };
 664
 665 #define FUSE_COMPAT_WRITE_IN_SIZE 24
 666
 667 struct fuse_write_in {
 668         uint64_t        fh;
 669         uint64_t        offset;
 670         uint32_t        size;
 671         uint32_t        write_flags;
 672         uint64_t        lock_owner;
 673         uint32_t        flags;
 674         uint32_t        padding;
 675 };
 676
 677 struct fuse_write_out {
 678         uint32_t        size;
 679         uint32_t        padding;
 680 };
 681
 682 #define FUSE_COMPAT_STATFS_SIZE 48
 683
 684 struct fuse_statfs_out {
 685         struct fuse_kstatfs st;
 686 };
 687
 688 struct fuse_fsync_in {
 689         uint64_t        fh;
 690         uint32_t        fsync_flags;
 691         uint32_t        padding;
 692 };
 693
 694 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8
 695
 696 struct fuse_setxattr_in {
 697         uint32_t        size;
 698         uint32_t        flags;
 699         uint32_t        setxattr_flags;
 700         uint32_t        padding;
 701 };
 702
 703 struct fuse_getxattr_in {
 704         uint32_t        size;
 705         uint32_t        padding;
 706 };
 707
 708 struct fuse_getxattr_out {
 709         uint32_t        size;
 710         uint32_t        padding;
 711 };
 712
 713 struct fuse_lk_in {
 714         uint64_t        fh;
 715         uint64_t        owner;
 716         struct fuse_file_lock lk;
 717         uint32_t        lk_flags;
 718         uint32_t        padding;
 719 };
 720
 721 struct fuse_lk_out {
 722         struct fuse_file_lock lk;
 723 };
 724
 725 struct fuse_access_in {
 726         uint32_t        mask;
 727         uint32_t        padding;
 728 };
 729
 730 struct fuse_init_in {
 731         uint32_t        major;
 732         uint32_t        minor;
 733         uint32_t        max_readahead;
 734         uint32_t        flags;
 735 };
 736
 737 #define FUSE_COMPAT_INIT_OUT_SIZE 8
 738 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24
 739
 740 struct fuse_init_out {
 741         uint32_t        major;
 742         uint32_t        minor;
 743         uint32_t        max_readahead;
 744         uint32_t        flags;
 745         uint16_t        max_background;
 746         uint16_t        congestion_threshold;
 747         uint32_t        max_write;
 748         uint32_t        time_gran;
 749         uint16_t        max_pages;
 750         uint16_t        map_alignment;
 751         uint32_t        unused[8];
 752 };
 753
 754 #define CUSE_INIT_INFO_MAX 4096
 755
 756 struct cuse_init_in {
 757         uint32_t        major;
 758         uint32_t        minor;
 759         uint32_t        unused;
 760         uint32_t        flags;
 761 };
 762
 763 struct cuse_init_out {
 764         uint32_t        major;
 765         uint32_t        minor;
 766         uint32_t        unused;
 767         uint32_t        flags;
 768         uint32_t        max_read;
 769         uint32_t        max_write;
 770         uint32_t        dev_major;              /* chardev major */
 771         uint32_t        dev_minor;              /* chardev minor */
 772         uint32_t        spare[10];
 773 };
 774
 775 struct fuse_interrupt_in {
 776         uint64_t        unique;
 777 };
 778
 779 struct fuse_bmap_in {
 780         uint64_t        block;
 781         uint32_t        blocksize;
 782         uint32_t        padding;
 783 };
 784
 785 struct fuse_bmap_out {
 786         uint64_t        block;
 787 };
 788
 789 struct fuse_ioctl_in {
 790         uint64_t        fh;
 791         uint32_t        flags;
 792         uint32_t        cmd;
 793         uint64_t        arg;
 794         uint32_t        in_size;
 795         uint32_t        out_size;
 796 };
 797
 798 struct fuse_ioctl_iovec {
 799         uint64_t        base;
 800         uint64_t        len;
 801 };
 802
 803 struct fuse_ioctl_out {
 804         int32_t         result;
 805         uint32_t        flags;
 806         uint32_t        in_iovs;
 807         uint32_t        out_iovs;
 808 };
 809
 810 struct fuse_poll_in {
 811         uint64_t        fh;
 812         uint64_t        kh;
 813         uint32_t        flags;
 814         uint32_t        events;
 815 };
 816
 817 struct fuse_poll_out {
 818         uint32_t        revents;
 819         uint32_t        padding;
 820 };
 821
 822 struct fuse_notify_poll_wakeup_out {
 823         uint64_t        kh;
 824 };
 825
 826 struct fuse_fallocate_in {
 827         uint64_t        fh;
 828         uint64_t        offset;
 829         uint64_t        length;
 830         uint32_t        mode;
 831         uint32_t        padding;
 832 };
 833
 834 struct fuse_in_header {
 835         uint32_t        len;
 836         uint32_t        opcode;
 837         uint64_t        unique;
 838         uint64_t        nodeid;
 839         uint32_t        uid;
 840         uint32_t        gid;
 841         uint32_t        pid;
 842         uint32_t        padding;
 843 };
 844
 845 struct fuse_out_header {
 846         uint32_t        len;
 847         int32_t         error;
 848         uint64_t        unique;
 849 };
 850
 851 struct fuse_dirent {
 852         uint64_t        ino;
 853         uint64_t        off;
 854         uint32_t        namelen;
 855         uint32_t        type;
 856         char name[];
 857 };
 858
 859 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
 860 #define FUSE_DIRENT_ALIGN(x) \
 861         (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
 862 #define FUSE_DIRENT_SIZE(d) \
 863         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
 864
 865 struct fuse_direntplus {
 866         struct fuse_entry_out entry_out;
 867         struct fuse_dirent dirent;
 868 };
 869
 870 #define FUSE_NAME_OFFSET_DIRENTPLUS \
 871         offsetof(struct fuse_direntplus, dirent.name)
 872 #define FUSE_DIRENTPLUS_SIZE(d) \
 873         FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
 874
 875 struct fuse_notify_inval_inode_out {
 876         uint64_t        ino;
 877         int64_t         off;
 878         int64_t         len;
 879 };
 880
 881 struct fuse_notify_inval_entry_out {
 882         uint64_t        parent;
 883         uint32_t        namelen;
 884         uint32_t        padding;
 885 };
 886
 887 struct fuse_notify_delete_out {
 888         uint64_t        parent;
 889         uint64_t        child;
 890         uint32_t        namelen;
 891         uint32_t        padding;
 892 };
 893
 894 struct fuse_notify_store_out {
 895         uint64_t        nodeid;
 896         uint64_t        offset;
 897         uint32_t        size;
 898         uint32_t        padding;
 899 };
 900
 901 struct fuse_notify_retrieve_out {
 902         uint64_t        notify_unique;
 903         uint64_t        nodeid;
 904         uint64_t        offset;
 905         uint32_t        size;
 906         uint32_t        padding;
 907 };
 908
 909 /* Matches the size of fuse_write_in */
 910 struct fuse_notify_retrieve_in {
 911         uint64_t        dummy1;
 912         uint64_t        offset;
 913         uint32_t        size;
 914         uint32_t        dummy2;
 915         uint64_t        dummy3;
 916         uint64_t        dummy4;
 917 };
 918
 919 /* Device ioctls: */
 920 #define FUSE_DEV_IOC_MAGIC              229
 921 #define FUSE_DEV_IOC_CLONE              _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
 922
 923 struct fuse_lseek_in {
 924         uint64_t        fh;
 925         uint64_t        offset;
 926         uint32_t        whence;
 927         uint32_t        padding;
 928 };
 929
 930 struct fuse_lseek_out {
 931         uint64_t        offset;
 932 };
 933
 934 struct fuse_copy_file_range_in {
 935         uint64_t        fh_in;
 936         uint64_t        off_in;
 937         uint64_t        nodeid_out;
 938         uint64_t        fh_out;
 939         uint64_t        off_out;
 940         uint64_t        len;
 941         uint64_t        flags;
 942 };
 943
 944 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
 945 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
 946 struct fuse_setupmapping_in {
 947         /* An already open handle */
 948         uint64_t        fh;
 949         /* Offset into the file to start the mapping */
 950         uint64_t        foffset;
 951         /* Length of mapping required */
 952         uint64_t        len;
 953         /* Flags, FUSE_SETUPMAPPING_FLAG_* */
 954         uint64_t        flags;
 955         /* Offset in Memory Window */
 956         uint64_t        moffset;
 957 };
 958
 959 struct fuse_removemapping_in {
 960         /* number of fuse_removemapping_one follows */
 961         uint32_t        count;
 962 };
 963
 964 struct fuse_removemapping_one {
 965         /* Offset into the dax window start the unmapping */
 966         uint64_t        moffset;
 967         /* Length of mapping required */
 968         uint64_t        len;
 969 };
 970
 971 #define FUSE_REMOVEMAPPING_MAX_ENTRY   \
 972                 (PAGE_SIZE / sizeof(struct fuse_removemapping_one))
 973
 974 struct fuse_syncfs_in {
 975         uint64_t        padding;
 976 };
 977
 978 #endif /* _LINUX_FUSE_H */