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 #ifdef __KERNEL__ 181 #include <linux/types.h> 182 #else 183 #include <stdint.h> 184 #endif 185 186 /* 187 * Version negotiation: 188 * 189 * Both the kernel and userspace send the version they support in the 190 * INIT request and reply respectively. 191 * 192 * If the major versions match then both shall use the smallest 193 * of the two minor versions for communication. 194 * 195 * If the kernel supports a larger major version, then userspace shall 196 * reply with the major version it supports, ignore the rest of the 197 * INIT message and expect a new INIT message from the kernel with a 198 * matching major version. 199 * 200 * If the library supports a larger major version, then it shall fall 201 * back to the major protocol version sent by the kernel for 202 * communication and reply with that major version (and an arbitrary 203 * supported minor version). 204 */ 205 206 /** Version number of this interface */ 207 #define FUSE_KERNEL_VERSION 7 208 209 /** Minor version number of this interface */ 210 #define FUSE_KERNEL_MINOR_VERSION 31 211 212 /** The node ID of the root inode */ 213 #define FUSE_ROOT_ID 1 214 215 /* Make sure all structures are padded to 64bit boundary, so 32bit 216 userspace works under 64bit kernels */ 217 218 struct fuse_attr { 219 uint64_t ino; 220 uint64_t size; 221 uint64_t blocks; 222 uint64_t atime; 223 uint64_t mtime; 224 uint64_t ctime; 225 uint32_t atimensec; 226 uint32_t mtimensec; 227 uint32_t ctimensec; 228 uint32_t mode; 229 uint32_t nlink; 230 uint32_t uid; 231 uint32_t gid; 232 uint32_t rdev; 233 uint32_t blksize; 234 uint32_t padding; 235 }; 236 237 struct fuse_kstatfs { 238 uint64_t blocks; 239 uint64_t bfree; 240 uint64_t bavail; 241 uint64_t files; 242 uint64_t ffree; 243 uint32_t bsize; 244 uint32_t namelen; 245 uint32_t frsize; 246 uint32_t padding; 247 uint32_t spare[6]; 248 }; 249 250 struct fuse_file_lock { 251 uint64_t start; 252 uint64_t end; 253 uint32_t type; 254 uint32_t pid; /* tgid */ 255 }; 256 257 /** 258 * Bitmasks for fuse_setattr_in.valid 259 */ 260 #define FATTR_MODE (1 << 0) 261 #define FATTR_UID (1 << 1) 262 #define FATTR_GID (1 << 2) 263 #define FATTR_SIZE (1 << 3) 264 #define FATTR_ATIME (1 << 4) 265 #define FATTR_MTIME (1 << 5) 266 #define FATTR_FH (1 << 6) 267 #define FATTR_ATIME_NOW (1 << 7) 268 #define FATTR_MTIME_NOW (1 << 8) 269 #define FATTR_LOCKOWNER (1 << 9) 270 #define FATTR_CTIME (1 << 10) 271 272 /** 273 * Flags returned by the OPEN request 274 * 275 * FOPEN_DIRECT_IO: bypass page cache for this open file 276 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 277 * FOPEN_NONSEEKABLE: the file is not seekable 278 * FOPEN_CACHE_DIR: allow caching this directory 279 * FOPEN_STREAM: the file is stream-like (no file position at all) 280 */ 281 #define FOPEN_DIRECT_IO (1 << 0) 282 #define FOPEN_KEEP_CACHE (1 << 1) 283 #define FOPEN_NONSEEKABLE (1 << 2) 284 #define FOPEN_CACHE_DIR (1 << 3) 285 #define FOPEN_STREAM (1 << 4) 286 287 /** 288 * INIT request/reply flags 289 * 290 * FUSE_ASYNC_READ: asynchronous read requests 291 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 292 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 293 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 294 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 295 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 296 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 297 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 298 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 299 * FUSE_SPLICE_READ: kernel supports splice read on the device 300 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 301 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 302 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 303 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 304 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 305 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 306 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 307 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 308 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 309 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 310 * FUSE_POSIX_ACL: filesystem supports posix acls 311 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 312 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 313 * FUSE_CACHE_SYMLINKS: cache READLINK responses 314 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 315 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 316 * FUSE_MAP_ALIGNMENT: map_alignment field is valid 317 */ 318 #define FUSE_ASYNC_READ (1 << 0) 319 #define FUSE_POSIX_LOCKS (1 << 1) 320 #define FUSE_FILE_OPS (1 << 2) 321 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 322 #define FUSE_EXPORT_SUPPORT (1 << 4) 323 #define FUSE_BIG_WRITES (1 << 5) 324 #define FUSE_DONT_MASK (1 << 6) 325 #define FUSE_SPLICE_WRITE (1 << 7) 326 #define FUSE_SPLICE_MOVE (1 << 8) 327 #define FUSE_SPLICE_READ (1 << 9) 328 #define FUSE_FLOCK_LOCKS (1 << 10) 329 #define FUSE_HAS_IOCTL_DIR (1 << 11) 330 #define FUSE_AUTO_INVAL_DATA (1 << 12) 331 #define FUSE_DO_READDIRPLUS (1 << 13) 332 #define FUSE_READDIRPLUS_AUTO (1 << 14) 333 #define FUSE_ASYNC_DIO (1 << 15) 334 #define FUSE_WRITEBACK_CACHE (1 << 16) 335 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 336 #define FUSE_PARALLEL_DIROPS (1 << 18) 337 #define FUSE_HANDLE_KILLPRIV (1 << 19) 338 #define FUSE_POSIX_ACL (1 << 20) 339 #define FUSE_ABORT_ERROR (1 << 21) 340 #define FUSE_MAX_PAGES (1 << 22) 341 #define FUSE_CACHE_SYMLINKS (1 << 23) 342 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 343 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 344 #define FUSE_MAP_ALIGNMENT (1 << 26) 345 346 /** 347 * CUSE INIT request/reply flags 348 * 349 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 350 */ 351 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 352 353 /** 354 * Release flags 355 */ 356 #define FUSE_RELEASE_FLUSH (1 << 0) 357 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 358 359 /** 360 * Getattr flags 361 */ 362 #define FUSE_GETATTR_FH (1 << 0) 363 364 /** 365 * Lock flags 366 */ 367 #define FUSE_LK_FLOCK (1 << 0) 368 369 /** 370 * WRITE flags 371 * 372 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 373 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 374 * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits 375 */ 376 #define FUSE_WRITE_CACHE (1 << 0) 377 #define FUSE_WRITE_LOCKOWNER (1 << 1) 378 #define FUSE_WRITE_KILL_PRIV (1 << 2) 379 380 /** 381 * Read flags 382 */ 383 #define FUSE_READ_LOCKOWNER (1 << 1) 384 385 /** 386 * Ioctl flags 387 * 388 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 389 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 390 * FUSE_IOCTL_RETRY: retry with new iovecs 391 * FUSE_IOCTL_32BIT: 32bit ioctl 392 * FUSE_IOCTL_DIR: is a directory 393 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 394 * 395 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 396 */ 397 #define FUSE_IOCTL_COMPAT (1 << 0) 398 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 399 #define FUSE_IOCTL_RETRY (1 << 2) 400 #define FUSE_IOCTL_32BIT (1 << 3) 401 #define FUSE_IOCTL_DIR (1 << 4) 402 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 403 404 #define FUSE_IOCTL_MAX_IOV 256 405 406 /** 407 * Poll flags 408 * 409 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 410 */ 411 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 412 413 /** 414 * Fsync flags 415 * 416 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 417 */ 418 #define FUSE_FSYNC_FDATASYNC (1 << 0) 419 420 enum fuse_opcode { 421 FUSE_LOOKUP = 1, 422 FUSE_FORGET = 2, /* no reply */ 423 FUSE_GETATTR = 3, 424 FUSE_SETATTR = 4, 425 FUSE_READLINK = 5, 426 FUSE_SYMLINK = 6, 427 FUSE_MKNOD = 8, 428 FUSE_MKDIR = 9, 429 FUSE_UNLINK = 10, 430 FUSE_RMDIR = 11, 431 FUSE_RENAME = 12, 432 FUSE_LINK = 13, 433 FUSE_OPEN = 14, 434 FUSE_READ = 15, 435 FUSE_WRITE = 16, 436 FUSE_STATFS = 17, 437 FUSE_RELEASE = 18, 438 FUSE_FSYNC = 20, 439 FUSE_SETXATTR = 21, 440 FUSE_GETXATTR = 22, 441 FUSE_LISTXATTR = 23, 442 FUSE_REMOVEXATTR = 24, 443 FUSE_FLUSH = 25, 444 FUSE_INIT = 26, 445 FUSE_OPENDIR = 27, 446 FUSE_READDIR = 28, 447 FUSE_RELEASEDIR = 29, 448 FUSE_FSYNCDIR = 30, 449 FUSE_GETLK = 31, 450 FUSE_SETLK = 32, 451 FUSE_SETLKW = 33, 452 FUSE_ACCESS = 34, 453 FUSE_CREATE = 35, 454 FUSE_INTERRUPT = 36, 455 FUSE_BMAP = 37, 456 FUSE_DESTROY = 38, 457 FUSE_IOCTL = 39, 458 FUSE_POLL = 40, 459 FUSE_NOTIFY_REPLY = 41, 460 FUSE_BATCH_FORGET = 42, 461 FUSE_FALLOCATE = 43, 462 FUSE_READDIRPLUS = 44, 463 FUSE_RENAME2 = 45, 464 FUSE_LSEEK = 46, 465 FUSE_COPY_FILE_RANGE = 47, 466 FUSE_SETUPMAPPING = 48, 467 FUSE_REMOVEMAPPING = 49, 468 469 /* CUSE specific operations */ 470 CUSE_INIT = 4096, 471 472 /* Reserved opcodes: helpful to detect structure endian-ness */ 473 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 474 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 475 }; 476 477 enum fuse_notify_code { 478 FUSE_NOTIFY_POLL = 1, 479 FUSE_NOTIFY_INVAL_INODE = 2, 480 FUSE_NOTIFY_INVAL_ENTRY = 3, 481 FUSE_NOTIFY_STORE = 4, 482 FUSE_NOTIFY_RETRIEVE = 5, 483 FUSE_NOTIFY_DELETE = 6, 484 FUSE_NOTIFY_CODE_MAX, 485 }; 486 487 /* The read buffer is required to be at least 8k, but may be much larger */ 488 #define FUSE_MIN_READ_BUFFER 8192 489 490 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 491 492 struct fuse_entry_out { 493 uint64_t nodeid; /* Inode ID */ 494 uint64_t generation; /* Inode generation: nodeid:gen must 495 be unique for the fs's lifetime */ 496 uint64_t entry_valid; /* Cache timeout for the name */ 497 uint64_t attr_valid; /* Cache timeout for the attributes */ 498 uint32_t entry_valid_nsec; 499 uint32_t attr_valid_nsec; 500 struct fuse_attr attr; 501 }; 502 503 struct fuse_forget_in { 504 uint64_t nlookup; 505 }; 506 507 struct fuse_forget_one { 508 uint64_t nodeid; 509 uint64_t nlookup; 510 }; 511 512 struct fuse_batch_forget_in { 513 uint32_t count; 514 uint32_t dummy; 515 }; 516 517 struct fuse_getattr_in { 518 uint32_t getattr_flags; 519 uint32_t dummy; 520 uint64_t fh; 521 }; 522 523 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 524 525 struct fuse_attr_out { 526 uint64_t attr_valid; /* Cache timeout for the attributes */ 527 uint32_t attr_valid_nsec; 528 uint32_t dummy; 529 struct fuse_attr attr; 530 }; 531 532 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 533 534 struct fuse_mknod_in { 535 uint32_t mode; 536 uint32_t rdev; 537 uint32_t umask; 538 uint32_t padding; 539 }; 540 541 struct fuse_mkdir_in { 542 uint32_t mode; 543 uint32_t umask; 544 }; 545 546 struct fuse_rename_in { 547 uint64_t newdir; 548 }; 549 550 struct fuse_rename2_in { 551 uint64_t newdir; 552 uint32_t flags; 553 uint32_t padding; 554 }; 555 556 struct fuse_link_in { 557 uint64_t oldnodeid; 558 }; 559 560 struct fuse_setattr_in { 561 uint32_t valid; 562 uint32_t padding; 563 uint64_t fh; 564 uint64_t size; 565 uint64_t lock_owner; 566 uint64_t atime; 567 uint64_t mtime; 568 uint64_t ctime; 569 uint32_t atimensec; 570 uint32_t mtimensec; 571 uint32_t ctimensec; 572 uint32_t mode; 573 uint32_t unused4; 574 uint32_t uid; 575 uint32_t gid; 576 uint32_t unused5; 577 }; 578 579 struct fuse_open_in { 580 uint32_t flags; 581 uint32_t unused; 582 }; 583 584 struct fuse_create_in { 585 uint32_t flags; 586 uint32_t mode; 587 uint32_t umask; 588 uint32_t padding; 589 }; 590 591 struct fuse_open_out { 592 uint64_t fh; 593 uint32_t open_flags; 594 uint32_t padding; 595 }; 596 597 struct fuse_release_in { 598 uint64_t fh; 599 uint32_t flags; 600 uint32_t release_flags; 601 uint64_t lock_owner; 602 }; 603 604 struct fuse_flush_in { 605 uint64_t fh; 606 uint32_t unused; 607 uint32_t padding; 608 uint64_t lock_owner; 609 }; 610 611 struct fuse_read_in { 612 uint64_t fh; 613 uint64_t offset; 614 uint32_t size; 615 uint32_t read_flags; 616 uint64_t lock_owner; 617 uint32_t flags; 618 uint32_t padding; 619 }; 620 621 #define FUSE_COMPAT_WRITE_IN_SIZE 24 622 623 struct fuse_write_in { 624 uint64_t fh; 625 uint64_t offset; 626 uint32_t size; 627 uint32_t write_flags; 628 uint64_t lock_owner; 629 uint32_t flags; 630 uint32_t padding; 631 }; 632 633 struct fuse_write_out { 634 uint32_t size; 635 uint32_t padding; 636 }; 637 638 #define FUSE_COMPAT_STATFS_SIZE 48 639 640 struct fuse_statfs_out { 641 struct fuse_kstatfs st; 642 }; 643 644 struct fuse_fsync_in { 645 uint64_t fh; 646 uint32_t fsync_flags; 647 uint32_t padding; 648 }; 649 650 struct fuse_setxattr_in { 651 uint32_t size; 652 uint32_t flags; 653 }; 654 655 struct fuse_getxattr_in { 656 uint32_t size; 657 uint32_t padding; 658 }; 659 660 struct fuse_getxattr_out { 661 uint32_t size; 662 uint32_t padding; 663 }; 664 665 struct fuse_lk_in { 666 uint64_t fh; 667 uint64_t owner; 668 struct fuse_file_lock lk; 669 uint32_t lk_flags; 670 uint32_t padding; 671 }; 672 673 struct fuse_lk_out { 674 struct fuse_file_lock lk; 675 }; 676 677 struct fuse_access_in { 678 uint32_t mask; 679 uint32_t padding; 680 }; 681 682 struct fuse_init_in { 683 uint32_t major; 684 uint32_t minor; 685 uint32_t max_readahead; 686 uint32_t flags; 687 }; 688 689 #define FUSE_COMPAT_INIT_OUT_SIZE 8 690 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 691 692 struct fuse_init_out { 693 uint32_t major; 694 uint32_t minor; 695 uint32_t max_readahead; 696 uint32_t flags; 697 uint16_t max_background; 698 uint16_t congestion_threshold; 699 uint32_t max_write; 700 uint32_t time_gran; 701 uint16_t max_pages; 702 uint16_t map_alignment; 703 uint32_t unused[8]; 704 }; 705 706 #define CUSE_INIT_INFO_MAX 4096 707 708 struct cuse_init_in { 709 uint32_t major; 710 uint32_t minor; 711 uint32_t unused; 712 uint32_t flags; 713 }; 714 715 struct cuse_init_out { 716 uint32_t major; 717 uint32_t minor; 718 uint32_t unused; 719 uint32_t flags; 720 uint32_t max_read; 721 uint32_t max_write; 722 uint32_t dev_major; /* chardev major */ 723 uint32_t dev_minor; /* chardev minor */ 724 uint32_t spare[10]; 725 }; 726 727 struct fuse_interrupt_in { 728 uint64_t unique; 729 }; 730 731 struct fuse_bmap_in { 732 uint64_t block; 733 uint32_t blocksize; 734 uint32_t padding; 735 }; 736 737 struct fuse_bmap_out { 738 uint64_t block; 739 }; 740 741 struct fuse_ioctl_in { 742 uint64_t fh; 743 uint32_t flags; 744 uint32_t cmd; 745 uint64_t arg; 746 uint32_t in_size; 747 uint32_t out_size; 748 }; 749 750 struct fuse_ioctl_iovec { 751 uint64_t base; 752 uint64_t len; 753 }; 754 755 struct fuse_ioctl_out { 756 int32_t result; 757 uint32_t flags; 758 uint32_t in_iovs; 759 uint32_t out_iovs; 760 }; 761 762 struct fuse_poll_in { 763 uint64_t fh; 764 uint64_t kh; 765 uint32_t flags; 766 uint32_t events; 767 }; 768 769 struct fuse_poll_out { 770 uint32_t revents; 771 uint32_t padding; 772 }; 773 774 struct fuse_notify_poll_wakeup_out { 775 uint64_t kh; 776 }; 777 778 struct fuse_fallocate_in { 779 uint64_t fh; 780 uint64_t offset; 781 uint64_t length; 782 uint32_t mode; 783 uint32_t padding; 784 }; 785 786 struct fuse_in_header { 787 uint32_t len; 788 uint32_t opcode; 789 uint64_t unique; 790 uint64_t nodeid; 791 uint32_t uid; 792 uint32_t gid; 793 uint32_t pid; 794 uint32_t padding; 795 }; 796 797 struct fuse_out_header { 798 uint32_t len; 799 int32_t error; 800 uint64_t unique; 801 }; 802 803 struct fuse_dirent { 804 uint64_t ino; 805 uint64_t off; 806 uint32_t namelen; 807 uint32_t type; 808 char name[]; 809 }; 810 811 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 812 #define FUSE_DIRENT_ALIGN(x) \ 813 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 814 #define FUSE_DIRENT_SIZE(d) \ 815 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 816 817 struct fuse_direntplus { 818 struct fuse_entry_out entry_out; 819 struct fuse_dirent dirent; 820 }; 821 822 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 823 offsetof(struct fuse_direntplus, dirent.name) 824 #define FUSE_DIRENTPLUS_SIZE(d) \ 825 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 826 827 struct fuse_notify_inval_inode_out { 828 uint64_t ino; 829 int64_t off; 830 int64_t len; 831 }; 832 833 struct fuse_notify_inval_entry_out { 834 uint64_t parent; 835 uint32_t namelen; 836 uint32_t padding; 837 }; 838 839 struct fuse_notify_delete_out { 840 uint64_t parent; 841 uint64_t child; 842 uint32_t namelen; 843 uint32_t padding; 844 }; 845 846 struct fuse_notify_store_out { 847 uint64_t nodeid; 848 uint64_t offset; 849 uint32_t size; 850 uint32_t padding; 851 }; 852 853 struct fuse_notify_retrieve_out { 854 uint64_t notify_unique; 855 uint64_t nodeid; 856 uint64_t offset; 857 uint32_t size; 858 uint32_t padding; 859 }; 860 861 /* Matches the size of fuse_write_in */ 862 struct fuse_notify_retrieve_in { 863 uint64_t dummy1; 864 uint64_t offset; 865 uint32_t size; 866 uint32_t dummy2; 867 uint64_t dummy3; 868 uint64_t dummy4; 869 }; 870 871 /* Device ioctls: */ 872 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 873 874 struct fuse_lseek_in { 875 uint64_t fh; 876 uint64_t offset; 877 uint32_t whence; 878 uint32_t padding; 879 }; 880 881 struct fuse_lseek_out { 882 uint64_t offset; 883 }; 884 885 struct fuse_copy_file_range_in { 886 uint64_t fh_in; 887 uint64_t off_in; 888 uint64_t nodeid_out; 889 uint64_t fh_out; 890 uint64_t off_out; 891 uint64_t len; 892 uint64_t flags; 893 }; 894 895 #endif /* _LINUX_FUSE_H */ 896