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 */ 179 180 #ifndef _LINUX_FUSE_H 181 #define _LINUX_FUSE_H 182 183 #include <stdint.h> 184 185 /* 186 * Version negotiation: 187 * 188 * Both the kernel and userspace send the version they support in the 189 * INIT request and reply respectively. 190 * 191 * If the major versions match then both shall use the smallest 192 * of the two minor versions for communication. 193 * 194 * If the kernel supports a larger major version, then userspace shall 195 * reply with the major version it supports, ignore the rest of the 196 * INIT message and expect a new INIT message from the kernel with a 197 * matching major version. 198 * 199 * If the library supports a larger major version, then it shall fall 200 * back to the major protocol version sent by the kernel for 201 * communication and reply with that major version (and an arbitrary 202 * supported minor version). 203 */ 204 205 /** Version number of this interface */ 206 #define FUSE_KERNEL_VERSION 7 207 208 /** Minor version number of this interface */ 209 #define FUSE_KERNEL_MINOR_VERSION 32 210 211 /** The node ID of the root inode */ 212 #define FUSE_ROOT_ID 1 213 214 /* Make sure all structures are padded to 64bit boundary, so 32bit 215 userspace works under 64bit kernels */ 216 217 struct fuse_attr { 218 uint64_t ino; 219 uint64_t size; 220 uint64_t blocks; 221 uint64_t atime; 222 uint64_t mtime; 223 uint64_t ctime; 224 uint32_t atimensec; 225 uint32_t mtimensec; 226 uint32_t ctimensec; 227 uint32_t mode; 228 uint32_t nlink; 229 uint32_t uid; 230 uint32_t gid; 231 uint32_t rdev; 232 uint32_t blksize; 233 uint32_t flags; 234 }; 235 236 struct fuse_kstatfs { 237 uint64_t blocks; 238 uint64_t bfree; 239 uint64_t bavail; 240 uint64_t files; 241 uint64_t ffree; 242 uint32_t bsize; 243 uint32_t namelen; 244 uint32_t frsize; 245 uint32_t padding; 246 uint32_t spare[6]; 247 }; 248 249 struct fuse_file_lock { 250 uint64_t start; 251 uint64_t end; 252 uint32_t type; 253 uint32_t pid; /* tgid */ 254 }; 255 256 /** 257 * Bitmasks for fuse_setattr_in.valid 258 */ 259 #define FATTR_MODE (1 << 0) 260 #define FATTR_UID (1 << 1) 261 #define FATTR_GID (1 << 2) 262 #define FATTR_SIZE (1 << 3) 263 #define FATTR_ATIME (1 << 4) 264 #define FATTR_MTIME (1 << 5) 265 #define FATTR_FH (1 << 6) 266 #define FATTR_ATIME_NOW (1 << 7) 267 #define FATTR_MTIME_NOW (1 << 8) 268 #define FATTR_LOCKOWNER (1 << 9) 269 #define FATTR_CTIME (1 << 10) 270 271 /** 272 * Flags returned by the OPEN request 273 * 274 * FOPEN_DIRECT_IO: bypass page cache for this open file 275 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 276 * FOPEN_NONSEEKABLE: the file is not seekable 277 * FOPEN_CACHE_DIR: allow caching this directory 278 * FOPEN_STREAM: the file is stream-like (no file position at all) 279 */ 280 #define FOPEN_DIRECT_IO (1 << 0) 281 #define FOPEN_KEEP_CACHE (1 << 1) 282 #define FOPEN_NONSEEKABLE (1 << 2) 283 #define FOPEN_CACHE_DIR (1 << 3) 284 #define FOPEN_STREAM (1 << 4) 285 286 /** 287 * INIT request/reply flags 288 * 289 * FUSE_ASYNC_READ: asynchronous read requests 290 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 291 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 292 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 293 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 294 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 295 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 296 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 297 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 298 * FUSE_SPLICE_READ: kernel supports splice read on the device 299 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 300 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 301 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 302 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 303 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 304 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 305 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 306 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 307 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 308 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 309 * FUSE_POSIX_ACL: filesystem supports posix acls 310 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 311 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 312 * FUSE_CACHE_SYMLINKS: cache READLINK responses 313 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 314 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 315 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for 316 * foffset and moffset fields in struct 317 * fuse_setupmapping_out and fuse_removemapping_one. 318 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts 319 */ 320 #define FUSE_ASYNC_READ (1 << 0) 321 #define FUSE_POSIX_LOCKS (1 << 1) 322 #define FUSE_FILE_OPS (1 << 2) 323 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 324 #define FUSE_EXPORT_SUPPORT (1 << 4) 325 #define FUSE_BIG_WRITES (1 << 5) 326 #define FUSE_DONT_MASK (1 << 6) 327 #define FUSE_SPLICE_WRITE (1 << 7) 328 #define FUSE_SPLICE_MOVE (1 << 8) 329 #define FUSE_SPLICE_READ (1 << 9) 330 #define FUSE_FLOCK_LOCKS (1 << 10) 331 #define FUSE_HAS_IOCTL_DIR (1 << 11) 332 #define FUSE_AUTO_INVAL_DATA (1 << 12) 333 #define FUSE_DO_READDIRPLUS (1 << 13) 334 #define FUSE_READDIRPLUS_AUTO (1 << 14) 335 #define FUSE_ASYNC_DIO (1 << 15) 336 #define FUSE_WRITEBACK_CACHE (1 << 16) 337 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 338 #define FUSE_PARALLEL_DIROPS (1 << 18) 339 #define FUSE_HANDLE_KILLPRIV (1 << 19) 340 #define FUSE_POSIX_ACL (1 << 20) 341 #define FUSE_ABORT_ERROR (1 << 21) 342 #define FUSE_MAX_PAGES (1 << 22) 343 #define FUSE_CACHE_SYMLINKS (1 << 23) 344 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 345 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 346 #define FUSE_MAP_ALIGNMENT (1 << 26) 347 #define FUSE_SUBMOUNTS (1 << 27) 348 349 /** 350 * CUSE INIT request/reply flags 351 * 352 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 353 */ 354 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 355 356 /** 357 * Release flags 358 */ 359 #define FUSE_RELEASE_FLUSH (1 << 0) 360 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 361 362 /** 363 * Getattr flags 364 */ 365 #define FUSE_GETATTR_FH (1 << 0) 366 367 /** 368 * Lock flags 369 */ 370 #define FUSE_LK_FLOCK (1 << 0) 371 372 /** 373 * WRITE flags 374 * 375 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 376 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 377 * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits 378 */ 379 #define FUSE_WRITE_CACHE (1 << 0) 380 #define FUSE_WRITE_LOCKOWNER (1 << 1) 381 #define FUSE_WRITE_KILL_PRIV (1 << 2) 382 383 /** 384 * Read flags 385 */ 386 #define FUSE_READ_LOCKOWNER (1 << 1) 387 388 /** 389 * Ioctl flags 390 * 391 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 392 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 393 * FUSE_IOCTL_RETRY: retry with new iovecs 394 * FUSE_IOCTL_32BIT: 32bit ioctl 395 * FUSE_IOCTL_DIR: is a directory 396 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 397 * 398 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 399 */ 400 #define FUSE_IOCTL_COMPAT (1 << 0) 401 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 402 #define FUSE_IOCTL_RETRY (1 << 2) 403 #define FUSE_IOCTL_32BIT (1 << 3) 404 #define FUSE_IOCTL_DIR (1 << 4) 405 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 406 407 #define FUSE_IOCTL_MAX_IOV 256 408 409 /** 410 * Poll flags 411 * 412 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 413 */ 414 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 415 416 /** 417 * Fsync flags 418 * 419 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 420 */ 421 #define FUSE_FSYNC_FDATASYNC (1 << 0) 422 423 /** 424 * fuse_attr flags 425 * 426 * FUSE_ATTR_SUBMOUNT: Object is a submount root 427 */ 428 #define FUSE_ATTR_SUBMOUNT (1 << 0) 429 430 enum fuse_opcode { 431 FUSE_LOOKUP = 1, 432 FUSE_FORGET = 2, /* no reply */ 433 FUSE_GETATTR = 3, 434 FUSE_SETATTR = 4, 435 FUSE_READLINK = 5, 436 FUSE_SYMLINK = 6, 437 FUSE_MKNOD = 8, 438 FUSE_MKDIR = 9, 439 FUSE_UNLINK = 10, 440 FUSE_RMDIR = 11, 441 FUSE_RENAME = 12, 442 FUSE_LINK = 13, 443 FUSE_OPEN = 14, 444 FUSE_READ = 15, 445 FUSE_WRITE = 16, 446 FUSE_STATFS = 17, 447 FUSE_RELEASE = 18, 448 FUSE_FSYNC = 20, 449 FUSE_SETXATTR = 21, 450 FUSE_GETXATTR = 22, 451 FUSE_LISTXATTR = 23, 452 FUSE_REMOVEXATTR = 24, 453 FUSE_FLUSH = 25, 454 FUSE_INIT = 26, 455 FUSE_OPENDIR = 27, 456 FUSE_READDIR = 28, 457 FUSE_RELEASEDIR = 29, 458 FUSE_FSYNCDIR = 30, 459 FUSE_GETLK = 31, 460 FUSE_SETLK = 32, 461 FUSE_SETLKW = 33, 462 FUSE_ACCESS = 34, 463 FUSE_CREATE = 35, 464 FUSE_INTERRUPT = 36, 465 FUSE_BMAP = 37, 466 FUSE_DESTROY = 38, 467 FUSE_IOCTL = 39, 468 FUSE_POLL = 40, 469 FUSE_NOTIFY_REPLY = 41, 470 FUSE_BATCH_FORGET = 42, 471 FUSE_FALLOCATE = 43, 472 FUSE_READDIRPLUS = 44, 473 FUSE_RENAME2 = 45, 474 FUSE_LSEEK = 46, 475 FUSE_COPY_FILE_RANGE = 47, 476 FUSE_SETUPMAPPING = 48, 477 FUSE_REMOVEMAPPING = 49, 478 479 /* CUSE specific operations */ 480 CUSE_INIT = 4096, 481 482 /* Reserved opcodes: helpful to detect structure endian-ness */ 483 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 484 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 485 }; 486 487 enum fuse_notify_code { 488 FUSE_NOTIFY_POLL = 1, 489 FUSE_NOTIFY_INVAL_INODE = 2, 490 FUSE_NOTIFY_INVAL_ENTRY = 3, 491 FUSE_NOTIFY_STORE = 4, 492 FUSE_NOTIFY_RETRIEVE = 5, 493 FUSE_NOTIFY_DELETE = 6, 494 FUSE_NOTIFY_CODE_MAX, 495 }; 496 497 /* The read buffer is required to be at least 8k, but may be much larger */ 498 #define FUSE_MIN_READ_BUFFER 8192 499 500 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 501 502 struct fuse_entry_out { 503 uint64_t nodeid; /* Inode ID */ 504 uint64_t generation; /* Inode generation: nodeid:gen must 505 be unique for the fs's lifetime */ 506 uint64_t entry_valid; /* Cache timeout for the name */ 507 uint64_t attr_valid; /* Cache timeout for the attributes */ 508 uint32_t entry_valid_nsec; 509 uint32_t attr_valid_nsec; 510 struct fuse_attr attr; 511 }; 512 513 struct fuse_forget_in { 514 uint64_t nlookup; 515 }; 516 517 struct fuse_forget_one { 518 uint64_t nodeid; 519 uint64_t nlookup; 520 }; 521 522 struct fuse_batch_forget_in { 523 uint32_t count; 524 uint32_t dummy; 525 }; 526 527 struct fuse_getattr_in { 528 uint32_t getattr_flags; 529 uint32_t dummy; 530 uint64_t fh; 531 }; 532 533 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 534 535 struct fuse_attr_out { 536 uint64_t attr_valid; /* Cache timeout for the attributes */ 537 uint32_t attr_valid_nsec; 538 uint32_t dummy; 539 struct fuse_attr attr; 540 }; 541 542 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 543 544 struct fuse_mknod_in { 545 uint32_t mode; 546 uint32_t rdev; 547 uint32_t umask; 548 uint32_t padding; 549 }; 550 551 struct fuse_mkdir_in { 552 uint32_t mode; 553 uint32_t umask; 554 }; 555 556 struct fuse_rename_in { 557 uint64_t newdir; 558 }; 559 560 struct fuse_rename2_in { 561 uint64_t newdir; 562 uint32_t flags; 563 uint32_t padding; 564 }; 565 566 struct fuse_link_in { 567 uint64_t oldnodeid; 568 }; 569 570 struct fuse_setattr_in { 571 uint32_t valid; 572 uint32_t padding; 573 uint64_t fh; 574 uint64_t size; 575 uint64_t lock_owner; 576 uint64_t atime; 577 uint64_t mtime; 578 uint64_t ctime; 579 uint32_t atimensec; 580 uint32_t mtimensec; 581 uint32_t ctimensec; 582 uint32_t mode; 583 uint32_t unused4; 584 uint32_t uid; 585 uint32_t gid; 586 uint32_t unused5; 587 }; 588 589 struct fuse_open_in { 590 uint32_t flags; 591 uint32_t unused; 592 }; 593 594 struct fuse_create_in { 595 uint32_t flags; 596 uint32_t mode; 597 uint32_t umask; 598 uint32_t padding; 599 }; 600 601 struct fuse_open_out { 602 uint64_t fh; 603 uint32_t open_flags; 604 uint32_t padding; 605 }; 606 607 struct fuse_release_in { 608 uint64_t fh; 609 uint32_t flags; 610 uint32_t release_flags; 611 uint64_t lock_owner; 612 }; 613 614 struct fuse_flush_in { 615 uint64_t fh; 616 uint32_t unused; 617 uint32_t padding; 618 uint64_t lock_owner; 619 }; 620 621 struct fuse_read_in { 622 uint64_t fh; 623 uint64_t offset; 624 uint32_t size; 625 uint32_t read_flags; 626 uint64_t lock_owner; 627 uint32_t flags; 628 uint32_t padding; 629 }; 630 631 #define FUSE_COMPAT_WRITE_IN_SIZE 24 632 633 struct fuse_write_in { 634 uint64_t fh; 635 uint64_t offset; 636 uint32_t size; 637 uint32_t write_flags; 638 uint64_t lock_owner; 639 uint32_t flags; 640 uint32_t padding; 641 }; 642 643 struct fuse_write_out { 644 uint32_t size; 645 uint32_t padding; 646 }; 647 648 #define FUSE_COMPAT_STATFS_SIZE 48 649 650 struct fuse_statfs_out { 651 struct fuse_kstatfs st; 652 }; 653 654 struct fuse_fsync_in { 655 uint64_t fh; 656 uint32_t fsync_flags; 657 uint32_t padding; 658 }; 659 660 struct fuse_setxattr_in { 661 uint32_t size; 662 uint32_t flags; 663 }; 664 665 struct fuse_getxattr_in { 666 uint32_t size; 667 uint32_t padding; 668 }; 669 670 struct fuse_getxattr_out { 671 uint32_t size; 672 uint32_t padding; 673 }; 674 675 struct fuse_lk_in { 676 uint64_t fh; 677 uint64_t owner; 678 struct fuse_file_lock lk; 679 uint32_t lk_flags; 680 uint32_t padding; 681 }; 682 683 struct fuse_lk_out { 684 struct fuse_file_lock lk; 685 }; 686 687 struct fuse_access_in { 688 uint32_t mask; 689 uint32_t padding; 690 }; 691 692 struct fuse_init_in { 693 uint32_t major; 694 uint32_t minor; 695 uint32_t max_readahead; 696 uint32_t flags; 697 }; 698 699 #define FUSE_COMPAT_INIT_OUT_SIZE 8 700 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 701 702 struct fuse_init_out { 703 uint32_t major; 704 uint32_t minor; 705 uint32_t max_readahead; 706 uint32_t flags; 707 uint16_t max_background; 708 uint16_t congestion_threshold; 709 uint32_t max_write; 710 uint32_t time_gran; 711 uint16_t max_pages; 712 uint16_t map_alignment; 713 uint32_t unused[8]; 714 }; 715 716 #define CUSE_INIT_INFO_MAX 4096 717 718 struct cuse_init_in { 719 uint32_t major; 720 uint32_t minor; 721 uint32_t unused; 722 uint32_t flags; 723 }; 724 725 struct cuse_init_out { 726 uint32_t major; 727 uint32_t minor; 728 uint32_t unused; 729 uint32_t flags; 730 uint32_t max_read; 731 uint32_t max_write; 732 uint32_t dev_major; /* chardev major */ 733 uint32_t dev_minor; /* chardev minor */ 734 uint32_t spare[10]; 735 }; 736 737 struct fuse_interrupt_in { 738 uint64_t unique; 739 }; 740 741 struct fuse_bmap_in { 742 uint64_t block; 743 uint32_t blocksize; 744 uint32_t padding; 745 }; 746 747 struct fuse_bmap_out { 748 uint64_t block; 749 }; 750 751 struct fuse_ioctl_in { 752 uint64_t fh; 753 uint32_t flags; 754 uint32_t cmd; 755 uint64_t arg; 756 uint32_t in_size; 757 uint32_t out_size; 758 }; 759 760 struct fuse_ioctl_iovec { 761 uint64_t base; 762 uint64_t len; 763 }; 764 765 struct fuse_ioctl_out { 766 int32_t result; 767 uint32_t flags; 768 uint32_t in_iovs; 769 uint32_t out_iovs; 770 }; 771 772 struct fuse_poll_in { 773 uint64_t fh; 774 uint64_t kh; 775 uint32_t flags; 776 uint32_t events; 777 }; 778 779 struct fuse_poll_out { 780 uint32_t revents; 781 uint32_t padding; 782 }; 783 784 struct fuse_notify_poll_wakeup_out { 785 uint64_t kh; 786 }; 787 788 struct fuse_fallocate_in { 789 uint64_t fh; 790 uint64_t offset; 791 uint64_t length; 792 uint32_t mode; 793 uint32_t padding; 794 }; 795 796 struct fuse_in_header { 797 uint32_t len; 798 uint32_t opcode; 799 uint64_t unique; 800 uint64_t nodeid; 801 uint32_t uid; 802 uint32_t gid; 803 uint32_t pid; 804 uint32_t padding; 805 }; 806 807 struct fuse_out_header { 808 uint32_t len; 809 int32_t error; 810 uint64_t unique; 811 }; 812 813 struct fuse_dirent { 814 uint64_t ino; 815 uint64_t off; 816 uint32_t namelen; 817 uint32_t type; 818 char name[]; 819 }; 820 821 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 822 #define FUSE_DIRENT_ALIGN(x) \ 823 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 824 #define FUSE_DIRENT_SIZE(d) \ 825 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 826 827 struct fuse_direntplus { 828 struct fuse_entry_out entry_out; 829 struct fuse_dirent dirent; 830 }; 831 832 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 833 offsetof(struct fuse_direntplus, dirent.name) 834 #define FUSE_DIRENTPLUS_SIZE(d) \ 835 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 836 837 struct fuse_notify_inval_inode_out { 838 uint64_t ino; 839 int64_t off; 840 int64_t len; 841 }; 842 843 struct fuse_notify_inval_entry_out { 844 uint64_t parent; 845 uint32_t namelen; 846 uint32_t padding; 847 }; 848 849 struct fuse_notify_delete_out { 850 uint64_t parent; 851 uint64_t child; 852 uint32_t namelen; 853 uint32_t padding; 854 }; 855 856 struct fuse_notify_store_out { 857 uint64_t nodeid; 858 uint64_t offset; 859 uint32_t size; 860 uint32_t padding; 861 }; 862 863 struct fuse_notify_retrieve_out { 864 uint64_t notify_unique; 865 uint64_t nodeid; 866 uint64_t offset; 867 uint32_t size; 868 uint32_t padding; 869 }; 870 871 /* Matches the size of fuse_write_in */ 872 struct fuse_notify_retrieve_in { 873 uint64_t dummy1; 874 uint64_t offset; 875 uint32_t size; 876 uint32_t dummy2; 877 uint64_t dummy3; 878 uint64_t dummy4; 879 }; 880 881 /* Device ioctls: */ 882 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 883 884 struct fuse_lseek_in { 885 uint64_t fh; 886 uint64_t offset; 887 uint32_t whence; 888 uint32_t padding; 889 }; 890 891 struct fuse_lseek_out { 892 uint64_t offset; 893 }; 894 895 struct fuse_copy_file_range_in { 896 uint64_t fh_in; 897 uint64_t off_in; 898 uint64_t nodeid_out; 899 uint64_t fh_out; 900 uint64_t off_out; 901 uint64_t len; 902 uint64_t flags; 903 }; 904 905 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) 906 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1) 907 struct fuse_setupmapping_in { 908 /* An already open handle */ 909 uint64_t fh; 910 /* Offset into the file to start the mapping */ 911 uint64_t foffset; 912 /* Length of mapping required */ 913 uint64_t len; 914 /* Flags, FUSE_SETUPMAPPING_FLAG_* */ 915 uint64_t flags; 916 /* Offset in Memory Window */ 917 uint64_t moffset; 918 }; 919 920 struct fuse_removemapping_in { 921 /* number of fuse_removemapping_one follows */ 922 uint32_t count; 923 }; 924 925 struct fuse_removemapping_one { 926 /* Offset into the dax window start the unmapping */ 927 uint64_t moffset; 928 /* Length of mapping required */ 929 uint64_t len; 930 }; 931 932 #define FUSE_REMOVEMAPPING_MAX_ENTRY \ 933 (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) 934 935 #endif /* _LINUX_FUSE_H */ 936