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