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 */ 176 177 #ifndef _LINUX_FUSE_H 178 #define _LINUX_FUSE_H 179 180 #include <stdint.h> 181 182 /* 183 * Version negotiation: 184 * 185 * Both the kernel and userspace send the version they support in the 186 * INIT request and reply respectively. 187 * 188 * If the major versions match then both shall use the smallest 189 * of the two minor versions for communication. 190 * 191 * If the kernel supports a larger major version, then userspace shall 192 * reply with the major version it supports, ignore the rest of the 193 * INIT message and expect a new INIT message from the kernel with a 194 * matching major version. 195 * 196 * If the library supports a larger major version, then it shall fall 197 * back to the major protocol version sent by the kernel for 198 * communication and reply with that major version (and an arbitrary 199 * supported minor version). 200 */ 201 202 /** Version number of this interface */ 203 #define FUSE_KERNEL_VERSION 7 204 205 /** Minor version number of this interface */ 206 #define FUSE_KERNEL_MINOR_VERSION 31 207 208 /** The node ID of the root inode */ 209 #define FUSE_ROOT_ID 1 210 211 /* Make sure all structures are padded to 64bit boundary, so 32bit 212 userspace works under 64bit kernels */ 213 214 struct fuse_attr { 215 uint64_t ino; 216 uint64_t size; 217 uint64_t blocks; 218 uint64_t atime; 219 uint64_t mtime; 220 uint64_t ctime; 221 uint32_t atimensec; 222 uint32_t mtimensec; 223 uint32_t ctimensec; 224 uint32_t mode; 225 uint32_t nlink; 226 uint32_t uid; 227 uint32_t gid; 228 uint32_t rdev; 229 uint32_t blksize; 230 uint32_t padding; 231 }; 232 233 struct fuse_kstatfs { 234 uint64_t blocks; 235 uint64_t bfree; 236 uint64_t bavail; 237 uint64_t files; 238 uint64_t ffree; 239 uint32_t bsize; 240 uint32_t namelen; 241 uint32_t frsize; 242 uint32_t padding; 243 uint32_t spare[6]; 244 }; 245 246 struct fuse_file_lock { 247 uint64_t start; 248 uint64_t end; 249 uint32_t type; 250 uint32_t pid; /* tgid */ 251 }; 252 253 /** 254 * Bitmasks for fuse_setattr_in.valid 255 */ 256 #define FATTR_MODE (1 << 0) 257 #define FATTR_UID (1 << 1) 258 #define FATTR_GID (1 << 2) 259 #define FATTR_SIZE (1 << 3) 260 #define FATTR_ATIME (1 << 4) 261 #define FATTR_MTIME (1 << 5) 262 #define FATTR_FH (1 << 6) 263 #define FATTR_ATIME_NOW (1 << 7) 264 #define FATTR_MTIME_NOW (1 << 8) 265 #define FATTR_LOCKOWNER (1 << 9) 266 #define FATTR_CTIME (1 << 10) 267 268 /** 269 * Flags returned by the OPEN request 270 * 271 * FOPEN_DIRECT_IO: bypass page cache for this open file 272 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 273 * FOPEN_NONSEEKABLE: the file is not seekable 274 * FOPEN_CACHE_DIR: allow caching this directory 275 * FOPEN_STREAM: the file is stream-like (no file position at all) 276 */ 277 #define FOPEN_DIRECT_IO (1 << 0) 278 #define FOPEN_KEEP_CACHE (1 << 1) 279 #define FOPEN_NONSEEKABLE (1 << 2) 280 #define FOPEN_CACHE_DIR (1 << 3) 281 #define FOPEN_STREAM (1 << 4) 282 283 /** 284 * INIT request/reply flags 285 * 286 * FUSE_ASYNC_READ: asynchronous read requests 287 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 288 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 289 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 290 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 291 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 292 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 293 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 294 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 295 * FUSE_SPLICE_READ: kernel supports splice read on the device 296 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 297 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 298 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 299 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 300 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 301 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 302 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 303 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 304 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 305 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 306 * FUSE_POSIX_ACL: filesystem supports posix acls 307 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 308 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 309 * FUSE_CACHE_SYMLINKS: cache READLINK responses 310 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 311 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 312 * FUSE_MAP_ALIGNMENT: map_alignment field is valid 313 */ 314 #define FUSE_ASYNC_READ (1 << 0) 315 #define FUSE_POSIX_LOCKS (1 << 1) 316 #define FUSE_FILE_OPS (1 << 2) 317 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 318 #define FUSE_EXPORT_SUPPORT (1 << 4) 319 #define FUSE_BIG_WRITES (1 << 5) 320 #define FUSE_DONT_MASK (1 << 6) 321 #define FUSE_SPLICE_WRITE (1 << 7) 322 #define FUSE_SPLICE_MOVE (1 << 8) 323 #define FUSE_SPLICE_READ (1 << 9) 324 #define FUSE_FLOCK_LOCKS (1 << 10) 325 #define FUSE_HAS_IOCTL_DIR (1 << 11) 326 #define FUSE_AUTO_INVAL_DATA (1 << 12) 327 #define FUSE_DO_READDIRPLUS (1 << 13) 328 #define FUSE_READDIRPLUS_AUTO (1 << 14) 329 #define FUSE_ASYNC_DIO (1 << 15) 330 #define FUSE_WRITEBACK_CACHE (1 << 16) 331 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 332 #define FUSE_PARALLEL_DIROPS (1 << 18) 333 #define FUSE_HANDLE_KILLPRIV (1 << 19) 334 #define FUSE_POSIX_ACL (1 << 20) 335 #define FUSE_ABORT_ERROR (1 << 21) 336 #define FUSE_MAX_PAGES (1 << 22) 337 #define FUSE_CACHE_SYMLINKS (1 << 23) 338 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 339 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 340 #define FUSE_MAP_ALIGNMENT (1 << 26) 341 342 /** 343 * CUSE INIT request/reply flags 344 * 345 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 346 */ 347 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 348 349 /** 350 * Release flags 351 */ 352 #define FUSE_RELEASE_FLUSH (1 << 0) 353 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 354 355 /** 356 * Getattr flags 357 */ 358 #define FUSE_GETATTR_FH (1 << 0) 359 360 /** 361 * Lock flags 362 */ 363 #define FUSE_LK_FLOCK (1 << 0) 364 365 /** 366 * WRITE flags 367 * 368 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 369 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 370 * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits 371 */ 372 #define FUSE_WRITE_CACHE (1 << 0) 373 #define FUSE_WRITE_LOCKOWNER (1 << 1) 374 #define FUSE_WRITE_KILL_PRIV (1 << 2) 375 376 /** 377 * Read flags 378 */ 379 #define FUSE_READ_LOCKOWNER (1 << 1) 380 381 /** 382 * Ioctl flags 383 * 384 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 385 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 386 * FUSE_IOCTL_RETRY: retry with new iovecs 387 * FUSE_IOCTL_32BIT: 32bit ioctl 388 * FUSE_IOCTL_DIR: is a directory 389 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 390 * 391 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 392 */ 393 #define FUSE_IOCTL_COMPAT (1 << 0) 394 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 395 #define FUSE_IOCTL_RETRY (1 << 2) 396 #define FUSE_IOCTL_32BIT (1 << 3) 397 #define FUSE_IOCTL_DIR (1 << 4) 398 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 399 400 #define FUSE_IOCTL_MAX_IOV 256 401 402 /** 403 * Poll flags 404 * 405 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 406 */ 407 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 408 409 /** 410 * Fsync flags 411 * 412 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 413 */ 414 #define FUSE_FSYNC_FDATASYNC (1 << 0) 415 416 enum fuse_opcode { 417 FUSE_LOOKUP = 1, 418 FUSE_FORGET = 2, /* no reply */ 419 FUSE_GETATTR = 3, 420 FUSE_SETATTR = 4, 421 FUSE_READLINK = 5, 422 FUSE_SYMLINK = 6, 423 FUSE_MKNOD = 8, 424 FUSE_MKDIR = 9, 425 FUSE_UNLINK = 10, 426 FUSE_RMDIR = 11, 427 FUSE_RENAME = 12, 428 FUSE_LINK = 13, 429 FUSE_OPEN = 14, 430 FUSE_READ = 15, 431 FUSE_WRITE = 16, 432 FUSE_STATFS = 17, 433 FUSE_RELEASE = 18, 434 FUSE_FSYNC = 20, 435 FUSE_SETXATTR = 21, 436 FUSE_GETXATTR = 22, 437 FUSE_LISTXATTR = 23, 438 FUSE_REMOVEXATTR = 24, 439 FUSE_FLUSH = 25, 440 FUSE_INIT = 26, 441 FUSE_OPENDIR = 27, 442 FUSE_READDIR = 28, 443 FUSE_RELEASEDIR = 29, 444 FUSE_FSYNCDIR = 30, 445 FUSE_GETLK = 31, 446 FUSE_SETLK = 32, 447 FUSE_SETLKW = 33, 448 FUSE_ACCESS = 34, 449 FUSE_CREATE = 35, 450 FUSE_INTERRUPT = 36, 451 FUSE_BMAP = 37, 452 FUSE_DESTROY = 38, 453 FUSE_IOCTL = 39, 454 FUSE_POLL = 40, 455 FUSE_NOTIFY_REPLY = 41, 456 FUSE_BATCH_FORGET = 42, 457 FUSE_FALLOCATE = 43, 458 FUSE_READDIRPLUS = 44, 459 FUSE_RENAME2 = 45, 460 FUSE_LSEEK = 46, 461 FUSE_COPY_FILE_RANGE = 47, 462 FUSE_SETUPMAPPING = 48, 463 FUSE_REMOVEMAPPING = 49, 464 465 /* CUSE specific operations */ 466 CUSE_INIT = 4096, 467 468 /* Reserved opcodes: helpful to detect structure endian-ness */ 469 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 470 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 471 }; 472 473 enum fuse_notify_code { 474 FUSE_NOTIFY_POLL = 1, 475 FUSE_NOTIFY_INVAL_INODE = 2, 476 FUSE_NOTIFY_INVAL_ENTRY = 3, 477 FUSE_NOTIFY_STORE = 4, 478 FUSE_NOTIFY_RETRIEVE = 5, 479 FUSE_NOTIFY_DELETE = 6, 480 FUSE_NOTIFY_CODE_MAX, 481 }; 482 483 /* The read buffer is required to be at least 8k, but may be much larger */ 484 #define FUSE_MIN_READ_BUFFER 8192 485 486 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 487 488 struct fuse_entry_out { 489 uint64_t nodeid; /* Inode ID */ 490 uint64_t generation; /* Inode generation: nodeid:gen must 491 be unique for the fs's lifetime */ 492 uint64_t entry_valid; /* Cache timeout for the name */ 493 uint64_t attr_valid; /* Cache timeout for the attributes */ 494 uint32_t entry_valid_nsec; 495 uint32_t attr_valid_nsec; 496 struct fuse_attr attr; 497 }; 498 499 struct fuse_forget_in { 500 uint64_t nlookup; 501 }; 502 503 struct fuse_forget_one { 504 uint64_t nodeid; 505 uint64_t nlookup; 506 }; 507 508 struct fuse_batch_forget_in { 509 uint32_t count; 510 uint32_t dummy; 511 }; 512 513 struct fuse_getattr_in { 514 uint32_t getattr_flags; 515 uint32_t dummy; 516 uint64_t fh; 517 }; 518 519 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 520 521 struct fuse_attr_out { 522 uint64_t attr_valid; /* Cache timeout for the attributes */ 523 uint32_t attr_valid_nsec; 524 uint32_t dummy; 525 struct fuse_attr attr; 526 }; 527 528 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 529 530 struct fuse_mknod_in { 531 uint32_t mode; 532 uint32_t rdev; 533 uint32_t umask; 534 uint32_t padding; 535 }; 536 537 struct fuse_mkdir_in { 538 uint32_t mode; 539 uint32_t umask; 540 }; 541 542 struct fuse_rename_in { 543 uint64_t newdir; 544 }; 545 546 struct fuse_rename2_in { 547 uint64_t newdir; 548 uint32_t flags; 549 uint32_t padding; 550 }; 551 552 struct fuse_link_in { 553 uint64_t oldnodeid; 554 }; 555 556 struct fuse_setattr_in { 557 uint32_t valid; 558 uint32_t padding; 559 uint64_t fh; 560 uint64_t size; 561 uint64_t lock_owner; 562 uint64_t atime; 563 uint64_t mtime; 564 uint64_t ctime; 565 uint32_t atimensec; 566 uint32_t mtimensec; 567 uint32_t ctimensec; 568 uint32_t mode; 569 uint32_t unused4; 570 uint32_t uid; 571 uint32_t gid; 572 uint32_t unused5; 573 }; 574 575 struct fuse_open_in { 576 uint32_t flags; 577 uint32_t unused; 578 }; 579 580 struct fuse_create_in { 581 uint32_t flags; 582 uint32_t mode; 583 uint32_t umask; 584 uint32_t padding; 585 }; 586 587 struct fuse_open_out { 588 uint64_t fh; 589 uint32_t open_flags; 590 uint32_t padding; 591 }; 592 593 struct fuse_release_in { 594 uint64_t fh; 595 uint32_t flags; 596 uint32_t release_flags; 597 uint64_t lock_owner; 598 }; 599 600 struct fuse_flush_in { 601 uint64_t fh; 602 uint32_t unused; 603 uint32_t padding; 604 uint64_t lock_owner; 605 }; 606 607 struct fuse_read_in { 608 uint64_t fh; 609 uint64_t offset; 610 uint32_t size; 611 uint32_t read_flags; 612 uint64_t lock_owner; 613 uint32_t flags; 614 uint32_t padding; 615 }; 616 617 #define FUSE_COMPAT_WRITE_IN_SIZE 24 618 619 struct fuse_write_in { 620 uint64_t fh; 621 uint64_t offset; 622 uint32_t size; 623 uint32_t write_flags; 624 uint64_t lock_owner; 625 uint32_t flags; 626 uint32_t padding; 627 }; 628 629 struct fuse_write_out { 630 uint32_t size; 631 uint32_t padding; 632 }; 633 634 #define FUSE_COMPAT_STATFS_SIZE 48 635 636 struct fuse_statfs_out { 637 struct fuse_kstatfs st; 638 }; 639 640 struct fuse_fsync_in { 641 uint64_t fh; 642 uint32_t fsync_flags; 643 uint32_t padding; 644 }; 645 646 struct fuse_setxattr_in { 647 uint32_t size; 648 uint32_t flags; 649 }; 650 651 struct fuse_getxattr_in { 652 uint32_t size; 653 uint32_t padding; 654 }; 655 656 struct fuse_getxattr_out { 657 uint32_t size; 658 uint32_t padding; 659 }; 660 661 struct fuse_lk_in { 662 uint64_t fh; 663 uint64_t owner; 664 struct fuse_file_lock lk; 665 uint32_t lk_flags; 666 uint32_t padding; 667 }; 668 669 struct fuse_lk_out { 670 struct fuse_file_lock lk; 671 }; 672 673 struct fuse_access_in { 674 uint32_t mask; 675 uint32_t padding; 676 }; 677 678 struct fuse_init_in { 679 uint32_t major; 680 uint32_t minor; 681 uint32_t max_readahead; 682 uint32_t flags; 683 }; 684 685 #define FUSE_COMPAT_INIT_OUT_SIZE 8 686 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 687 688 struct fuse_init_out { 689 uint32_t major; 690 uint32_t minor; 691 uint32_t max_readahead; 692 uint32_t flags; 693 uint16_t max_background; 694 uint16_t congestion_threshold; 695 uint32_t max_write; 696 uint32_t time_gran; 697 uint16_t max_pages; 698 uint16_t map_alignment; 699 uint32_t unused[8]; 700 }; 701 702 #define CUSE_INIT_INFO_MAX 4096 703 704 struct cuse_init_in { 705 uint32_t major; 706 uint32_t minor; 707 uint32_t unused; 708 uint32_t flags; 709 }; 710 711 struct cuse_init_out { 712 uint32_t major; 713 uint32_t minor; 714 uint32_t unused; 715 uint32_t flags; 716 uint32_t max_read; 717 uint32_t max_write; 718 uint32_t dev_major; /* chardev major */ 719 uint32_t dev_minor; /* chardev minor */ 720 uint32_t spare[10]; 721 }; 722 723 struct fuse_interrupt_in { 724 uint64_t unique; 725 }; 726 727 struct fuse_bmap_in { 728 uint64_t block; 729 uint32_t blocksize; 730 uint32_t padding; 731 }; 732 733 struct fuse_bmap_out { 734 uint64_t block; 735 }; 736 737 struct fuse_ioctl_in { 738 uint64_t fh; 739 uint32_t flags; 740 uint32_t cmd; 741 uint64_t arg; 742 uint32_t in_size; 743 uint32_t out_size; 744 }; 745 746 struct fuse_ioctl_iovec { 747 uint64_t base; 748 uint64_t len; 749 }; 750 751 struct fuse_ioctl_out { 752 int32_t result; 753 uint32_t flags; 754 uint32_t in_iovs; 755 uint32_t out_iovs; 756 }; 757 758 struct fuse_poll_in { 759 uint64_t fh; 760 uint64_t kh; 761 uint32_t flags; 762 uint32_t events; 763 }; 764 765 struct fuse_poll_out { 766 uint32_t revents; 767 uint32_t padding; 768 }; 769 770 struct fuse_notify_poll_wakeup_out { 771 uint64_t kh; 772 }; 773 774 struct fuse_fallocate_in { 775 uint64_t fh; 776 uint64_t offset; 777 uint64_t length; 778 uint32_t mode; 779 uint32_t padding; 780 }; 781 782 struct fuse_in_header { 783 uint32_t len; 784 uint32_t opcode; 785 uint64_t unique; 786 uint64_t nodeid; 787 uint32_t uid; 788 uint32_t gid; 789 uint32_t pid; 790 uint32_t padding; 791 }; 792 793 struct fuse_out_header { 794 uint32_t len; 795 int32_t error; 796 uint64_t unique; 797 }; 798 799 struct fuse_dirent { 800 uint64_t ino; 801 uint64_t off; 802 uint32_t namelen; 803 uint32_t type; 804 char name[]; 805 }; 806 807 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 808 #define FUSE_DIRENT_ALIGN(x) \ 809 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 810 #define FUSE_DIRENT_SIZE(d) \ 811 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 812 813 struct fuse_direntplus { 814 struct fuse_entry_out entry_out; 815 struct fuse_dirent dirent; 816 }; 817 818 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 819 offsetof(struct fuse_direntplus, dirent.name) 820 #define FUSE_DIRENTPLUS_SIZE(d) \ 821 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 822 823 struct fuse_notify_inval_inode_out { 824 uint64_t ino; 825 int64_t off; 826 int64_t len; 827 }; 828 829 struct fuse_notify_inval_entry_out { 830 uint64_t parent; 831 uint32_t namelen; 832 uint32_t padding; 833 }; 834 835 struct fuse_notify_delete_out { 836 uint64_t parent; 837 uint64_t child; 838 uint32_t namelen; 839 uint32_t padding; 840 }; 841 842 struct fuse_notify_store_out { 843 uint64_t nodeid; 844 uint64_t offset; 845 uint32_t size; 846 uint32_t padding; 847 }; 848 849 struct fuse_notify_retrieve_out { 850 uint64_t notify_unique; 851 uint64_t nodeid; 852 uint64_t offset; 853 uint32_t size; 854 uint32_t padding; 855 }; 856 857 /* Matches the size of fuse_write_in */ 858 struct fuse_notify_retrieve_in { 859 uint64_t dummy1; 860 uint64_t offset; 861 uint32_t size; 862 uint32_t dummy2; 863 uint64_t dummy3; 864 uint64_t dummy4; 865 }; 866 867 /* Device ioctls: */ 868 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 869 870 struct fuse_lseek_in { 871 uint64_t fh; 872 uint64_t offset; 873 uint32_t whence; 874 uint32_t padding; 875 }; 876 877 struct fuse_lseek_out { 878 uint64_t offset; 879 }; 880 881 struct fuse_copy_file_range_in { 882 uint64_t fh_in; 883 uint64_t off_in; 884 uint64_t nodeid_out; 885 uint64_t fh_out; 886 uint64_t off_out; 887 uint64_t len; 888 uint64_t flags; 889 }; 890 891 #endif /* _LINUX_FUSE_H */ 892