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 <[email protected]> 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 * 7.9: 42 * - new fuse_getattr_in input argument of GETATTR 43 * - add lk_flags in fuse_lk_in 44 * - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in 45 * - add blksize field to fuse_attr 46 * - add file flags field to fuse_read_in and fuse_write_in 47 * - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in 48 * 49 * 7.10 50 * - add nonseekable open flag 51 * 52 * 7.11 53 * - add IOCTL message 54 * - add unsolicited notification support 55 * - add POLL message and NOTIFY_POLL notification 56 * 57 * 7.12 58 * - add umask flag to input argument of create, mknod and mkdir 59 * - add notification messages for invalidation of inodes and 60 * directory entries 61 * 62 * 7.13 63 * - make max number of background requests and congestion threshold 64 * tunables 65 * 66 * 7.14 67 * - add splice support to fuse device 68 * 69 * 7.15 70 * - add store notify 71 * - add retrieve notify 72 * 73 * 7.16 74 * - add BATCH_FORGET request 75 * - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct 76 * fuse_ioctl_iovec' instead of ambiguous 'struct iovec' 77 * - add FUSE_IOCTL_32BIT flag 78 * 79 * 7.17 80 * - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK 81 * 82 * 7.18 83 * - add FUSE_IOCTL_DIR flag 84 * - add FUSE_NOTIFY_DELETE 85 * 86 * 7.19 87 * - add FUSE_FALLOCATE 88 * 89 * 7.20 90 * - add FUSE_AUTO_INVAL_DATA 91 * 92 * 7.21 93 * - add FUSE_READDIRPLUS 94 * - send the requested events in POLL request 95 * 96 * 7.22 97 * - add FUSE_ASYNC_DIO 98 * 99 * 7.23 100 * - add FUSE_WRITEBACK_CACHE 101 * - add time_gran to fuse_init_out 102 * - add reserved space to fuse_init_out 103 * - add FATTR_CTIME 104 * - add ctime and ctimensec to fuse_setattr_in 105 * - add FUSE_RENAME2 request 106 * - add FUSE_NO_OPEN_SUPPORT flag 107 * 108 * 7.24 109 * - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support 110 * 111 * 7.25 112 * - add FUSE_PARALLEL_DIROPS 113 * 114 * 7.26 115 * - add FUSE_HANDLE_KILLPRIV 116 * - add FUSE_POSIX_ACL 117 * 118 * 7.27 119 * - add FUSE_ABORT_ERROR 120 * 121 * 7.28 122 * - add FUSE_COPY_FILE_RANGE 123 * - add FOPEN_CACHE_DIR 124 * - add FUSE_MAX_PAGES, add max_pages to init_out 125 * - add FUSE_CACHE_SYMLINKS 126 * 127 * 7.29 128 * - add FUSE_NO_OPENDIR_SUPPORT flag 129 * 130 * 7.30 131 * - add FUSE_EXPLICIT_INVAL_DATA 132 * - add FUSE_IOCTL_COMPAT_X32 133 * 134 * 7.31 135 * - add FUSE_WRITE_KILL_PRIV flag 136 */ 137 138 #ifndef _LINUX_FUSE_H 139 #define _LINUX_FUSE_H 140 141 #ifdef __KERNEL__ 142 #include <linux/types.h> 143 #else 144 #include <stdint.h> 145 #endif 146 147 /* 148 * Version negotiation: 149 * 150 * Both the kernel and userspace send the version they support in the 151 * INIT request and reply respectively. 152 * 153 * If the major versions match then both shall use the smallest 154 * of the two minor versions for communication. 155 * 156 * If the kernel supports a larger major version, then userspace shall 157 * reply with the major version it supports, ignore the rest of the 158 * INIT message and expect a new INIT message from the kernel with a 159 * matching major version. 160 * 161 * If the library supports a larger major version, then it shall fall 162 * back to the major protocol version sent by the kernel for 163 * communication and reply with that major version (and an arbitrary 164 * supported minor version). 165 */ 166 167 /** Version number of this interface */ 168 #define FUSE_KERNEL_VERSION 7 169 170 /** Minor version number of this interface */ 171 #define FUSE_KERNEL_MINOR_VERSION 31 172 173 /** The node ID of the root inode */ 174 #define FUSE_ROOT_ID 1 175 176 /* Make sure all structures are padded to 64bit boundary, so 32bit 177 userspace works under 64bit kernels */ 178 179 struct fuse_attr { 180 uint64_t ino; 181 uint64_t size; 182 uint64_t blocks; 183 uint64_t atime; 184 uint64_t mtime; 185 uint64_t ctime; 186 uint32_t atimensec; 187 uint32_t mtimensec; 188 uint32_t ctimensec; 189 uint32_t mode; 190 uint32_t nlink; 191 uint32_t uid; 192 uint32_t gid; 193 uint32_t rdev; 194 uint32_t blksize; 195 uint32_t padding; 196 }; 197 198 struct fuse_kstatfs { 199 uint64_t blocks; 200 uint64_t bfree; 201 uint64_t bavail; 202 uint64_t files; 203 uint64_t ffree; 204 uint32_t bsize; 205 uint32_t namelen; 206 uint32_t frsize; 207 uint32_t padding; 208 uint32_t spare[6]; 209 }; 210 211 struct fuse_file_lock { 212 uint64_t start; 213 uint64_t end; 214 uint32_t type; 215 uint32_t pid; /* tgid */ 216 }; 217 218 /** 219 * Bitmasks for fuse_setattr_in.valid 220 */ 221 #define FATTR_MODE (1 << 0) 222 #define FATTR_UID (1 << 1) 223 #define FATTR_GID (1 << 2) 224 #define FATTR_SIZE (1 << 3) 225 #define FATTR_ATIME (1 << 4) 226 #define FATTR_MTIME (1 << 5) 227 #define FATTR_FH (1 << 6) 228 #define FATTR_ATIME_NOW (1 << 7) 229 #define FATTR_MTIME_NOW (1 << 8) 230 #define FATTR_LOCKOWNER (1 << 9) 231 #define FATTR_CTIME (1 << 10) 232 233 /** 234 * Flags returned by the OPEN request 235 * 236 * FOPEN_DIRECT_IO: bypass page cache for this open file 237 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 238 * FOPEN_NONSEEKABLE: the file is not seekable 239 * FOPEN_CACHE_DIR: allow caching this directory 240 * FOPEN_STREAM: the file is stream-like (no file position at all) 241 */ 242 #define FOPEN_DIRECT_IO (1 << 0) 243 #define FOPEN_KEEP_CACHE (1 << 1) 244 #define FOPEN_NONSEEKABLE (1 << 2) 245 #define FOPEN_CACHE_DIR (1 << 3) 246 #define FOPEN_STREAM (1 << 4) 247 248 /** 249 * INIT request/reply flags 250 * 251 * FUSE_ASYNC_READ: asynchronous read requests 252 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 253 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 254 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 255 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 256 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 257 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 258 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 259 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 260 * FUSE_SPLICE_READ: kernel supports splice read on the device 261 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 262 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 263 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 264 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 265 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 266 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 267 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 268 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 269 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 270 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 271 * FUSE_POSIX_ACL: filesystem supports posix acls 272 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 273 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 274 * FUSE_CACHE_SYMLINKS: cache READLINK responses 275 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 276 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 277 */ 278 #define FUSE_ASYNC_READ (1 << 0) 279 #define FUSE_POSIX_LOCKS (1 << 1) 280 #define FUSE_FILE_OPS (1 << 2) 281 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 282 #define FUSE_EXPORT_SUPPORT (1 << 4) 283 #define FUSE_BIG_WRITES (1 << 5) 284 #define FUSE_DONT_MASK (1 << 6) 285 #define FUSE_SPLICE_WRITE (1 << 7) 286 #define FUSE_SPLICE_MOVE (1 << 8) 287 #define FUSE_SPLICE_READ (1 << 9) 288 #define FUSE_FLOCK_LOCKS (1 << 10) 289 #define FUSE_HAS_IOCTL_DIR (1 << 11) 290 #define FUSE_AUTO_INVAL_DATA (1 << 12) 291 #define FUSE_DO_READDIRPLUS (1 << 13) 292 #define FUSE_READDIRPLUS_AUTO (1 << 14) 293 #define FUSE_ASYNC_DIO (1 << 15) 294 #define FUSE_WRITEBACK_CACHE (1 << 16) 295 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 296 #define FUSE_PARALLEL_DIROPS (1 << 18) 297 #define FUSE_HANDLE_KILLPRIV (1 << 19) 298 #define FUSE_POSIX_ACL (1 << 20) 299 #define FUSE_ABORT_ERROR (1 << 21) 300 #define FUSE_MAX_PAGES (1 << 22) 301 #define FUSE_CACHE_SYMLINKS (1 << 23) 302 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 303 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 304 305 /** 306 * CUSE INIT request/reply flags 307 * 308 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 309 */ 310 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 311 312 /** 313 * Release flags 314 */ 315 #define FUSE_RELEASE_FLUSH (1 << 0) 316 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 317 318 /** 319 * Getattr flags 320 */ 321 #define FUSE_GETATTR_FH (1 << 0) 322 323 /** 324 * Lock flags 325 */ 326 #define FUSE_LK_FLOCK (1 << 0) 327 328 /** 329 * WRITE flags 330 * 331 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 332 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 333 * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits 334 */ 335 #define FUSE_WRITE_CACHE (1 << 0) 336 #define FUSE_WRITE_LOCKOWNER (1 << 1) 337 #define FUSE_WRITE_KILL_PRIV (1 << 2) 338 339 /** 340 * Read flags 341 */ 342 #define FUSE_READ_LOCKOWNER (1 << 1) 343 344 /** 345 * Ioctl flags 346 * 347 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 348 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 349 * FUSE_IOCTL_RETRY: retry with new iovecs 350 * FUSE_IOCTL_32BIT: 32bit ioctl 351 * FUSE_IOCTL_DIR: is a directory 352 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 353 * 354 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 355 */ 356 #define FUSE_IOCTL_COMPAT (1 << 0) 357 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 358 #define FUSE_IOCTL_RETRY (1 << 2) 359 #define FUSE_IOCTL_32BIT (1 << 3) 360 #define FUSE_IOCTL_DIR (1 << 4) 361 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 362 363 #define FUSE_IOCTL_MAX_IOV 256 364 365 /** 366 * Poll flags 367 * 368 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 369 */ 370 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 371 372 /** 373 * Fsync flags 374 * 375 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 376 */ 377 #define FUSE_FSYNC_FDATASYNC (1 << 0) 378 379 enum fuse_opcode { 380 FUSE_LOOKUP = 1, 381 FUSE_FORGET = 2, /* no reply */ 382 FUSE_GETATTR = 3, 383 FUSE_SETATTR = 4, 384 FUSE_READLINK = 5, 385 FUSE_SYMLINK = 6, 386 FUSE_MKNOD = 8, 387 FUSE_MKDIR = 9, 388 FUSE_UNLINK = 10, 389 FUSE_RMDIR = 11, 390 FUSE_RENAME = 12, 391 FUSE_LINK = 13, 392 FUSE_OPEN = 14, 393 FUSE_READ = 15, 394 FUSE_WRITE = 16, 395 FUSE_STATFS = 17, 396 FUSE_RELEASE = 18, 397 FUSE_FSYNC = 20, 398 FUSE_SETXATTR = 21, 399 FUSE_GETXATTR = 22, 400 FUSE_LISTXATTR = 23, 401 FUSE_REMOVEXATTR = 24, 402 FUSE_FLUSH = 25, 403 FUSE_INIT = 26, 404 FUSE_OPENDIR = 27, 405 FUSE_READDIR = 28, 406 FUSE_RELEASEDIR = 29, 407 FUSE_FSYNCDIR = 30, 408 FUSE_GETLK = 31, 409 FUSE_SETLK = 32, 410 FUSE_SETLKW = 33, 411 FUSE_ACCESS = 34, 412 FUSE_CREATE = 35, 413 FUSE_INTERRUPT = 36, 414 FUSE_BMAP = 37, 415 FUSE_DESTROY = 38, 416 FUSE_IOCTL = 39, 417 FUSE_POLL = 40, 418 FUSE_NOTIFY_REPLY = 41, 419 FUSE_BATCH_FORGET = 42, 420 FUSE_FALLOCATE = 43, 421 FUSE_READDIRPLUS = 44, 422 FUSE_RENAME2 = 45, 423 FUSE_LSEEK = 46, 424 FUSE_COPY_FILE_RANGE = 47, 425 426 /* CUSE specific operations */ 427 CUSE_INIT = 4096, 428 429 /* Reserved opcodes: helpful to detect structure endian-ness */ 430 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 431 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 432 }; 433 434 enum fuse_notify_code { 435 FUSE_NOTIFY_POLL = 1, 436 FUSE_NOTIFY_INVAL_INODE = 2, 437 FUSE_NOTIFY_INVAL_ENTRY = 3, 438 FUSE_NOTIFY_STORE = 4, 439 FUSE_NOTIFY_RETRIEVE = 5, 440 FUSE_NOTIFY_DELETE = 6, 441 FUSE_NOTIFY_CODE_MAX, 442 }; 443 444 /* The read buffer is required to be at least 8k, but may be much larger */ 445 #define FUSE_MIN_READ_BUFFER 8192 446 447 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 448 449 struct fuse_entry_out { 450 uint64_t nodeid; /* Inode ID */ 451 uint64_t generation; /* Inode generation: nodeid:gen must 452 be unique for the fs's lifetime */ 453 uint64_t entry_valid; /* Cache timeout for the name */ 454 uint64_t attr_valid; /* Cache timeout for the attributes */ 455 uint32_t entry_valid_nsec; 456 uint32_t attr_valid_nsec; 457 struct fuse_attr attr; 458 }; 459 460 struct fuse_forget_in { 461 uint64_t nlookup; 462 }; 463 464 struct fuse_forget_one { 465 uint64_t nodeid; 466 uint64_t nlookup; 467 }; 468 469 struct fuse_batch_forget_in { 470 uint32_t count; 471 uint32_t dummy; 472 }; 473 474 struct fuse_getattr_in { 475 uint32_t getattr_flags; 476 uint32_t dummy; 477 uint64_t fh; 478 }; 479 480 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 481 482 struct fuse_attr_out { 483 uint64_t attr_valid; /* Cache timeout for the attributes */ 484 uint32_t attr_valid_nsec; 485 uint32_t dummy; 486 struct fuse_attr attr; 487 }; 488 489 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 490 491 struct fuse_mknod_in { 492 uint32_t mode; 493 uint32_t rdev; 494 uint32_t umask; 495 uint32_t padding; 496 }; 497 498 struct fuse_mkdir_in { 499 uint32_t mode; 500 uint32_t umask; 501 }; 502 503 struct fuse_rename_in { 504 uint64_t newdir; 505 }; 506 507 struct fuse_rename2_in { 508 uint64_t newdir; 509 uint32_t flags; 510 uint32_t padding; 511 }; 512 513 struct fuse_link_in { 514 uint64_t oldnodeid; 515 }; 516 517 struct fuse_setattr_in { 518 uint32_t valid; 519 uint32_t padding; 520 uint64_t fh; 521 uint64_t size; 522 uint64_t lock_owner; 523 uint64_t atime; 524 uint64_t mtime; 525 uint64_t ctime; 526 uint32_t atimensec; 527 uint32_t mtimensec; 528 uint32_t ctimensec; 529 uint32_t mode; 530 uint32_t unused4; 531 uint32_t uid; 532 uint32_t gid; 533 uint32_t unused5; 534 }; 535 536 struct fuse_open_in { 537 uint32_t flags; 538 uint32_t unused; 539 }; 540 541 struct fuse_create_in { 542 uint32_t flags; 543 uint32_t mode; 544 uint32_t umask; 545 uint32_t padding; 546 }; 547 548 struct fuse_open_out { 549 uint64_t fh; 550 uint32_t open_flags; 551 uint32_t padding; 552 }; 553 554 struct fuse_release_in { 555 uint64_t fh; 556 uint32_t flags; 557 uint32_t release_flags; 558 uint64_t lock_owner; 559 }; 560 561 struct fuse_flush_in { 562 uint64_t fh; 563 uint32_t unused; 564 uint32_t padding; 565 uint64_t lock_owner; 566 }; 567 568 struct fuse_read_in { 569 uint64_t fh; 570 uint64_t offset; 571 uint32_t size; 572 uint32_t read_flags; 573 uint64_t lock_owner; 574 uint32_t flags; 575 uint32_t padding; 576 }; 577 578 #define FUSE_COMPAT_WRITE_IN_SIZE 24 579 580 struct fuse_write_in { 581 uint64_t fh; 582 uint64_t offset; 583 uint32_t size; 584 uint32_t write_flags; 585 uint64_t lock_owner; 586 uint32_t flags; 587 uint32_t padding; 588 }; 589 590 struct fuse_write_out { 591 uint32_t size; 592 uint32_t padding; 593 }; 594 595 #define FUSE_COMPAT_STATFS_SIZE 48 596 597 struct fuse_statfs_out { 598 struct fuse_kstatfs st; 599 }; 600 601 struct fuse_fsync_in { 602 uint64_t fh; 603 uint32_t fsync_flags; 604 uint32_t padding; 605 }; 606 607 struct fuse_setxattr_in { 608 uint32_t size; 609 uint32_t flags; 610 }; 611 612 struct fuse_getxattr_in { 613 uint32_t size; 614 uint32_t padding; 615 }; 616 617 struct fuse_getxattr_out { 618 uint32_t size; 619 uint32_t padding; 620 }; 621 622 struct fuse_lk_in { 623 uint64_t fh; 624 uint64_t owner; 625 struct fuse_file_lock lk; 626 uint32_t lk_flags; 627 uint32_t padding; 628 }; 629 630 struct fuse_lk_out { 631 struct fuse_file_lock lk; 632 }; 633 634 struct fuse_access_in { 635 uint32_t mask; 636 uint32_t padding; 637 }; 638 639 struct fuse_init_in { 640 uint32_t major; 641 uint32_t minor; 642 uint32_t max_readahead; 643 uint32_t flags; 644 }; 645 646 #define FUSE_COMPAT_INIT_OUT_SIZE 8 647 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 648 649 struct fuse_init_out { 650 uint32_t major; 651 uint32_t minor; 652 uint32_t max_readahead; 653 uint32_t flags; 654 uint16_t max_background; 655 uint16_t congestion_threshold; 656 uint32_t max_write; 657 uint32_t time_gran; 658 uint16_t max_pages; 659 uint16_t padding; 660 uint32_t unused[8]; 661 }; 662 663 #define CUSE_INIT_INFO_MAX 4096 664 665 struct cuse_init_in { 666 uint32_t major; 667 uint32_t minor; 668 uint32_t unused; 669 uint32_t flags; 670 }; 671 672 struct cuse_init_out { 673 uint32_t major; 674 uint32_t minor; 675 uint32_t unused; 676 uint32_t flags; 677 uint32_t max_read; 678 uint32_t max_write; 679 uint32_t dev_major; /* chardev major */ 680 uint32_t dev_minor; /* chardev minor */ 681 uint32_t spare[10]; 682 }; 683 684 struct fuse_interrupt_in { 685 uint64_t unique; 686 }; 687 688 struct fuse_bmap_in { 689 uint64_t block; 690 uint32_t blocksize; 691 uint32_t padding; 692 }; 693 694 struct fuse_bmap_out { 695 uint64_t block; 696 }; 697 698 struct fuse_ioctl_in { 699 uint64_t fh; 700 uint32_t flags; 701 uint32_t cmd; 702 uint64_t arg; 703 uint32_t in_size; 704 uint32_t out_size; 705 }; 706 707 struct fuse_ioctl_iovec { 708 uint64_t base; 709 uint64_t len; 710 }; 711 712 struct fuse_ioctl_out { 713 int32_t result; 714 uint32_t flags; 715 uint32_t in_iovs; 716 uint32_t out_iovs; 717 }; 718 719 struct fuse_poll_in { 720 uint64_t fh; 721 uint64_t kh; 722 uint32_t flags; 723 uint32_t events; 724 }; 725 726 struct fuse_poll_out { 727 uint32_t revents; 728 uint32_t padding; 729 }; 730 731 struct fuse_notify_poll_wakeup_out { 732 uint64_t kh; 733 }; 734 735 struct fuse_fallocate_in { 736 uint64_t fh; 737 uint64_t offset; 738 uint64_t length; 739 uint32_t mode; 740 uint32_t padding; 741 }; 742 743 struct fuse_in_header { 744 uint32_t len; 745 uint32_t opcode; 746 uint64_t unique; 747 uint64_t nodeid; 748 uint32_t uid; 749 uint32_t gid; 750 uint32_t pid; 751 uint32_t padding; 752 }; 753 754 struct fuse_out_header { 755 uint32_t len; 756 int32_t error; 757 uint64_t unique; 758 }; 759 760 struct fuse_dirent { 761 uint64_t ino; 762 uint64_t off; 763 uint32_t namelen; 764 uint32_t type; 765 char name[]; 766 }; 767 768 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 769 #define FUSE_DIRENT_ALIGN(x) \ 770 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 771 #define FUSE_DIRENT_SIZE(d) \ 772 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 773 774 struct fuse_direntplus { 775 struct fuse_entry_out entry_out; 776 struct fuse_dirent dirent; 777 }; 778 779 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 780 offsetof(struct fuse_direntplus, dirent.name) 781 #define FUSE_DIRENTPLUS_SIZE(d) \ 782 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 783 784 struct fuse_notify_inval_inode_out { 785 uint64_t ino; 786 int64_t off; 787 int64_t len; 788 }; 789 790 struct fuse_notify_inval_entry_out { 791 uint64_t parent; 792 uint32_t namelen; 793 uint32_t padding; 794 }; 795 796 struct fuse_notify_delete_out { 797 uint64_t parent; 798 uint64_t child; 799 uint32_t namelen; 800 uint32_t padding; 801 }; 802 803 struct fuse_notify_store_out { 804 uint64_t nodeid; 805 uint64_t offset; 806 uint32_t size; 807 uint32_t padding; 808 }; 809 810 struct fuse_notify_retrieve_out { 811 uint64_t notify_unique; 812 uint64_t nodeid; 813 uint64_t offset; 814 uint32_t size; 815 uint32_t padding; 816 }; 817 818 /* Matches the size of fuse_write_in */ 819 struct fuse_notify_retrieve_in { 820 uint64_t dummy1; 821 uint64_t offset; 822 uint32_t size; 823 uint32_t dummy2; 824 uint64_t dummy3; 825 uint64_t dummy4; 826 }; 827 828 /* Device ioctls: */ 829 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 830 831 struct fuse_lseek_in { 832 uint64_t fh; 833 uint64_t offset; 834 uint32_t whence; 835 uint32_t padding; 836 }; 837 838 struct fuse_lseek_out { 839 uint64_t offset; 840 }; 841 842 struct fuse_copy_file_range_in { 843 uint64_t fh_in; 844 uint64_t off_in; 845 uint64_t nodeid_out; 846 uint64_t fh_out; 847 uint64_t off_out; 848 uint64_t len; 849 uint64_t flags; 850 }; 851 852 #endif /* _LINUX_FUSE_H */ 853