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 flags; 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 * FUSE_ATTR_FLAGS: fuse_attr.flags is present and valid 314 */ 315 #define FUSE_ASYNC_READ (1 << 0) 316 #define FUSE_POSIX_LOCKS (1 << 1) 317 #define FUSE_FILE_OPS (1 << 2) 318 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 319 #define FUSE_EXPORT_SUPPORT (1 << 4) 320 #define FUSE_BIG_WRITES (1 << 5) 321 #define FUSE_DONT_MASK (1 << 6) 322 #define FUSE_SPLICE_WRITE (1 << 7) 323 #define FUSE_SPLICE_MOVE (1 << 8) 324 #define FUSE_SPLICE_READ (1 << 9) 325 #define FUSE_FLOCK_LOCKS (1 << 10) 326 #define FUSE_HAS_IOCTL_DIR (1 << 11) 327 #define FUSE_AUTO_INVAL_DATA (1 << 12) 328 #define FUSE_DO_READDIRPLUS (1 << 13) 329 #define FUSE_READDIRPLUS_AUTO (1 << 14) 330 #define FUSE_ASYNC_DIO (1 << 15) 331 #define FUSE_WRITEBACK_CACHE (1 << 16) 332 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 333 #define FUSE_PARALLEL_DIROPS (1 << 18) 334 #define FUSE_HANDLE_KILLPRIV (1 << 19) 335 #define FUSE_POSIX_ACL (1 << 20) 336 #define FUSE_ABORT_ERROR (1 << 21) 337 #define FUSE_MAX_PAGES (1 << 22) 338 #define FUSE_CACHE_SYMLINKS (1 << 23) 339 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 340 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 341 #define FUSE_MAP_ALIGNMENT (1 << 26) 342 #define FUSE_ATTR_FLAGS (1 << 27) 343 344 /** 345 * CUSE INIT request/reply flags 346 * 347 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 348 */ 349 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 350 351 /** 352 * Release flags 353 */ 354 #define FUSE_RELEASE_FLUSH (1 << 0) 355 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 356 357 /** 358 * Getattr flags 359 */ 360 #define FUSE_GETATTR_FH (1 << 0) 361 362 /** 363 * Lock flags 364 */ 365 #define FUSE_LK_FLOCK (1 << 0) 366 367 /** 368 * WRITE flags 369 * 370 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 371 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 372 * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits 373 */ 374 #define FUSE_WRITE_CACHE (1 << 0) 375 #define FUSE_WRITE_LOCKOWNER (1 << 1) 376 #define FUSE_WRITE_KILL_PRIV (1 << 2) 377 378 /** 379 * Read flags 380 */ 381 #define FUSE_READ_LOCKOWNER (1 << 1) 382 383 /** 384 * Ioctl flags 385 * 386 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 387 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 388 * FUSE_IOCTL_RETRY: retry with new iovecs 389 * FUSE_IOCTL_32BIT: 32bit ioctl 390 * FUSE_IOCTL_DIR: is a directory 391 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 392 * 393 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 394 */ 395 #define FUSE_IOCTL_COMPAT (1 << 0) 396 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 397 #define FUSE_IOCTL_RETRY (1 << 2) 398 #define FUSE_IOCTL_32BIT (1 << 3) 399 #define FUSE_IOCTL_DIR (1 << 4) 400 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 401 402 #define FUSE_IOCTL_MAX_IOV 256 403 404 /** 405 * Poll flags 406 * 407 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 408 */ 409 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 410 411 /** 412 * Fsync flags 413 * 414 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 415 */ 416 #define FUSE_FSYNC_FDATASYNC (1 << 0) 417 418 /** 419 * fuse_attr flags 420 * 421 * FUSE_ATTR_SUBMOUNT: File/directory is a submount point 422 */ 423 #define FUSE_ATTR_SUBMOUNT (1 << 0) 424 425 enum fuse_opcode { 426 FUSE_LOOKUP = 1, 427 FUSE_FORGET = 2, /* no reply */ 428 FUSE_GETATTR = 3, 429 FUSE_SETATTR = 4, 430 FUSE_READLINK = 5, 431 FUSE_SYMLINK = 6, 432 FUSE_MKNOD = 8, 433 FUSE_MKDIR = 9, 434 FUSE_UNLINK = 10, 435 FUSE_RMDIR = 11, 436 FUSE_RENAME = 12, 437 FUSE_LINK = 13, 438 FUSE_OPEN = 14, 439 FUSE_READ = 15, 440 FUSE_WRITE = 16, 441 FUSE_STATFS = 17, 442 FUSE_RELEASE = 18, 443 FUSE_FSYNC = 20, 444 FUSE_SETXATTR = 21, 445 FUSE_GETXATTR = 22, 446 FUSE_LISTXATTR = 23, 447 FUSE_REMOVEXATTR = 24, 448 FUSE_FLUSH = 25, 449 FUSE_INIT = 26, 450 FUSE_OPENDIR = 27, 451 FUSE_READDIR = 28, 452 FUSE_RELEASEDIR = 29, 453 FUSE_FSYNCDIR = 30, 454 FUSE_GETLK = 31, 455 FUSE_SETLK = 32, 456 FUSE_SETLKW = 33, 457 FUSE_ACCESS = 34, 458 FUSE_CREATE = 35, 459 FUSE_INTERRUPT = 36, 460 FUSE_BMAP = 37, 461 FUSE_DESTROY = 38, 462 FUSE_IOCTL = 39, 463 FUSE_POLL = 40, 464 FUSE_NOTIFY_REPLY = 41, 465 FUSE_BATCH_FORGET = 42, 466 FUSE_FALLOCATE = 43, 467 FUSE_READDIRPLUS = 44, 468 FUSE_RENAME2 = 45, 469 FUSE_LSEEK = 46, 470 FUSE_COPY_FILE_RANGE = 47, 471 FUSE_SETUPMAPPING = 48, 472 FUSE_REMOVEMAPPING = 49, 473 474 /* CUSE specific operations */ 475 CUSE_INIT = 4096, 476 477 /* Reserved opcodes: helpful to detect structure endian-ness */ 478 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 479 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 480 }; 481 482 enum fuse_notify_code { 483 FUSE_NOTIFY_POLL = 1, 484 FUSE_NOTIFY_INVAL_INODE = 2, 485 FUSE_NOTIFY_INVAL_ENTRY = 3, 486 FUSE_NOTIFY_STORE = 4, 487 FUSE_NOTIFY_RETRIEVE = 5, 488 FUSE_NOTIFY_DELETE = 6, 489 FUSE_NOTIFY_CODE_MAX, 490 }; 491 492 /* The read buffer is required to be at least 8k, but may be much larger */ 493 #define FUSE_MIN_READ_BUFFER 8192 494 495 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 496 497 struct fuse_entry_out { 498 uint64_t nodeid; /* Inode ID */ 499 uint64_t generation; /* Inode generation: nodeid:gen must 500 be unique for the fs's lifetime */ 501 uint64_t entry_valid; /* Cache timeout for the name */ 502 uint64_t attr_valid; /* Cache timeout for the attributes */ 503 uint32_t entry_valid_nsec; 504 uint32_t attr_valid_nsec; 505 struct fuse_attr attr; 506 }; 507 508 struct fuse_forget_in { 509 uint64_t nlookup; 510 }; 511 512 struct fuse_forget_one { 513 uint64_t nodeid; 514 uint64_t nlookup; 515 }; 516 517 struct fuse_batch_forget_in { 518 uint32_t count; 519 uint32_t dummy; 520 }; 521 522 struct fuse_getattr_in { 523 uint32_t getattr_flags; 524 uint32_t dummy; 525 uint64_t fh; 526 }; 527 528 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 529 530 struct fuse_attr_out { 531 uint64_t attr_valid; /* Cache timeout for the attributes */ 532 uint32_t attr_valid_nsec; 533 uint32_t dummy; 534 struct fuse_attr attr; 535 }; 536 537 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 538 539 struct fuse_mknod_in { 540 uint32_t mode; 541 uint32_t rdev; 542 uint32_t umask; 543 uint32_t padding; 544 }; 545 546 struct fuse_mkdir_in { 547 uint32_t mode; 548 uint32_t umask; 549 }; 550 551 struct fuse_rename_in { 552 uint64_t newdir; 553 }; 554 555 struct fuse_rename2_in { 556 uint64_t newdir; 557 uint32_t flags; 558 uint32_t padding; 559 }; 560 561 struct fuse_link_in { 562 uint64_t oldnodeid; 563 }; 564 565 struct fuse_setattr_in { 566 uint32_t valid; 567 uint32_t padding; 568 uint64_t fh; 569 uint64_t size; 570 uint64_t lock_owner; 571 uint64_t atime; 572 uint64_t mtime; 573 uint64_t ctime; 574 uint32_t atimensec; 575 uint32_t mtimensec; 576 uint32_t ctimensec; 577 uint32_t mode; 578 uint32_t unused4; 579 uint32_t uid; 580 uint32_t gid; 581 uint32_t unused5; 582 }; 583 584 struct fuse_open_in { 585 uint32_t flags; 586 uint32_t unused; 587 }; 588 589 struct fuse_create_in { 590 uint32_t flags; 591 uint32_t mode; 592 uint32_t umask; 593 uint32_t padding; 594 }; 595 596 struct fuse_open_out { 597 uint64_t fh; 598 uint32_t open_flags; 599 uint32_t padding; 600 }; 601 602 struct fuse_release_in { 603 uint64_t fh; 604 uint32_t flags; 605 uint32_t release_flags; 606 uint64_t lock_owner; 607 }; 608 609 struct fuse_flush_in { 610 uint64_t fh; 611 uint32_t unused; 612 uint32_t padding; 613 uint64_t lock_owner; 614 }; 615 616 struct fuse_read_in { 617 uint64_t fh; 618 uint64_t offset; 619 uint32_t size; 620 uint32_t read_flags; 621 uint64_t lock_owner; 622 uint32_t flags; 623 uint32_t padding; 624 }; 625 626 #define FUSE_COMPAT_WRITE_IN_SIZE 24 627 628 struct fuse_write_in { 629 uint64_t fh; 630 uint64_t offset; 631 uint32_t size; 632 uint32_t write_flags; 633 uint64_t lock_owner; 634 uint32_t flags; 635 uint32_t padding; 636 }; 637 638 struct fuse_write_out { 639 uint32_t size; 640 uint32_t padding; 641 }; 642 643 #define FUSE_COMPAT_STATFS_SIZE 48 644 645 struct fuse_statfs_out { 646 struct fuse_kstatfs st; 647 }; 648 649 struct fuse_fsync_in { 650 uint64_t fh; 651 uint32_t fsync_flags; 652 uint32_t padding; 653 }; 654 655 struct fuse_setxattr_in { 656 uint32_t size; 657 uint32_t flags; 658 }; 659 660 struct fuse_getxattr_in { 661 uint32_t size; 662 uint32_t padding; 663 }; 664 665 struct fuse_getxattr_out { 666 uint32_t size; 667 uint32_t padding; 668 }; 669 670 struct fuse_lk_in { 671 uint64_t fh; 672 uint64_t owner; 673 struct fuse_file_lock lk; 674 uint32_t lk_flags; 675 uint32_t padding; 676 }; 677 678 struct fuse_lk_out { 679 struct fuse_file_lock lk; 680 }; 681 682 struct fuse_access_in { 683 uint32_t mask; 684 uint32_t padding; 685 }; 686 687 struct fuse_init_in { 688 uint32_t major; 689 uint32_t minor; 690 uint32_t max_readahead; 691 uint32_t flags; 692 }; 693 694 #define FUSE_COMPAT_INIT_OUT_SIZE 8 695 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 696 697 struct fuse_init_out { 698 uint32_t major; 699 uint32_t minor; 700 uint32_t max_readahead; 701 uint32_t flags; 702 uint16_t max_background; 703 uint16_t congestion_threshold; 704 uint32_t max_write; 705 uint32_t time_gran; 706 uint16_t max_pages; 707 uint16_t map_alignment; 708 uint32_t unused[8]; 709 }; 710 711 #define CUSE_INIT_INFO_MAX 4096 712 713 struct cuse_init_in { 714 uint32_t major; 715 uint32_t minor; 716 uint32_t unused; 717 uint32_t flags; 718 }; 719 720 struct cuse_init_out { 721 uint32_t major; 722 uint32_t minor; 723 uint32_t unused; 724 uint32_t flags; 725 uint32_t max_read; 726 uint32_t max_write; 727 uint32_t dev_major; /* chardev major */ 728 uint32_t dev_minor; /* chardev minor */ 729 uint32_t spare[10]; 730 }; 731 732 struct fuse_interrupt_in { 733 uint64_t unique; 734 }; 735 736 struct fuse_bmap_in { 737 uint64_t block; 738 uint32_t blocksize; 739 uint32_t padding; 740 }; 741 742 struct fuse_bmap_out { 743 uint64_t block; 744 }; 745 746 struct fuse_ioctl_in { 747 uint64_t fh; 748 uint32_t flags; 749 uint32_t cmd; 750 uint64_t arg; 751 uint32_t in_size; 752 uint32_t out_size; 753 }; 754 755 struct fuse_ioctl_iovec { 756 uint64_t base; 757 uint64_t len; 758 }; 759 760 struct fuse_ioctl_out { 761 int32_t result; 762 uint32_t flags; 763 uint32_t in_iovs; 764 uint32_t out_iovs; 765 }; 766 767 struct fuse_poll_in { 768 uint64_t fh; 769 uint64_t kh; 770 uint32_t flags; 771 uint32_t events; 772 }; 773 774 struct fuse_poll_out { 775 uint32_t revents; 776 uint32_t padding; 777 }; 778 779 struct fuse_notify_poll_wakeup_out { 780 uint64_t kh; 781 }; 782 783 struct fuse_fallocate_in { 784 uint64_t fh; 785 uint64_t offset; 786 uint64_t length; 787 uint32_t mode; 788 uint32_t padding; 789 }; 790 791 struct fuse_in_header { 792 uint32_t len; 793 uint32_t opcode; 794 uint64_t unique; 795 uint64_t nodeid; 796 uint32_t uid; 797 uint32_t gid; 798 uint32_t pid; 799 uint32_t padding; 800 }; 801 802 struct fuse_out_header { 803 uint32_t len; 804 int32_t error; 805 uint64_t unique; 806 }; 807 808 struct fuse_dirent { 809 uint64_t ino; 810 uint64_t off; 811 uint32_t namelen; 812 uint32_t type; 813 char name[]; 814 }; 815 816 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 817 #define FUSE_DIRENT_ALIGN(x) \ 818 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 819 #define FUSE_DIRENT_SIZE(d) \ 820 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 821 822 struct fuse_direntplus { 823 struct fuse_entry_out entry_out; 824 struct fuse_dirent dirent; 825 }; 826 827 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 828 offsetof(struct fuse_direntplus, dirent.name) 829 #define FUSE_DIRENTPLUS_SIZE(d) \ 830 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 831 832 struct fuse_notify_inval_inode_out { 833 uint64_t ino; 834 int64_t off; 835 int64_t len; 836 }; 837 838 struct fuse_notify_inval_entry_out { 839 uint64_t parent; 840 uint32_t namelen; 841 uint32_t padding; 842 }; 843 844 struct fuse_notify_delete_out { 845 uint64_t parent; 846 uint64_t child; 847 uint32_t namelen; 848 uint32_t padding; 849 }; 850 851 struct fuse_notify_store_out { 852 uint64_t nodeid; 853 uint64_t offset; 854 uint32_t size; 855 uint32_t padding; 856 }; 857 858 struct fuse_notify_retrieve_out { 859 uint64_t notify_unique; 860 uint64_t nodeid; 861 uint64_t offset; 862 uint32_t size; 863 uint32_t padding; 864 }; 865 866 /* Matches the size of fuse_write_in */ 867 struct fuse_notify_retrieve_in { 868 uint64_t dummy1; 869 uint64_t offset; 870 uint32_t size; 871 uint32_t dummy2; 872 uint64_t dummy3; 873 uint64_t dummy4; 874 }; 875 876 /* Device ioctls: */ 877 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 878 879 struct fuse_lseek_in { 880 uint64_t fh; 881 uint64_t offset; 882 uint32_t whence; 883 uint32_t padding; 884 }; 885 886 struct fuse_lseek_out { 887 uint64_t offset; 888 }; 889 890 struct fuse_copy_file_range_in { 891 uint64_t fh_in; 892 uint64_t off_in; 893 uint64_t nodeid_out; 894 uint64_t fh_out; 895 uint64_t off_out; 896 uint64_t len; 897 uint64_t flags; 898 }; 899 900 #endif /* _LINUX_FUSE_H */ 901