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 * - 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 #define FUSE_PASSTHROUGH (1 << 31) 305 306 /** 307 * CUSE INIT request/reply flags 308 * 309 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 310 */ 311 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 312 313 /** 314 * Release flags 315 */ 316 #define FUSE_RELEASE_FLUSH (1 << 0) 317 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 318 319 /** 320 * Getattr flags 321 */ 322 #define FUSE_GETATTR_FH (1 << 0) 323 324 /** 325 * Lock flags 326 */ 327 #define FUSE_LK_FLOCK (1 << 0) 328 329 /** 330 * WRITE flags 331 * 332 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 333 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 334 * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits 335 */ 336 #define FUSE_WRITE_CACHE (1 << 0) 337 #define FUSE_WRITE_LOCKOWNER (1 << 1) 338 #define FUSE_WRITE_KILL_PRIV (1 << 2) 339 340 /** 341 * Read flags 342 */ 343 #define FUSE_READ_LOCKOWNER (1 << 1) 344 345 /** 346 * Ioctl flags 347 * 348 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 349 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 350 * FUSE_IOCTL_RETRY: retry with new iovecs 351 * FUSE_IOCTL_32BIT: 32bit ioctl 352 * FUSE_IOCTL_DIR: is a directory 353 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 354 * 355 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 356 */ 357 #define FUSE_IOCTL_COMPAT (1 << 0) 358 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 359 #define FUSE_IOCTL_RETRY (1 << 2) 360 #define FUSE_IOCTL_32BIT (1 << 3) 361 #define FUSE_IOCTL_DIR (1 << 4) 362 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 363 364 #define FUSE_IOCTL_MAX_IOV 256 365 366 /** 367 * Poll flags 368 * 369 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 370 */ 371 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 372 373 /** 374 * Fsync flags 375 * 376 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 377 */ 378 #define FUSE_FSYNC_FDATASYNC (1 << 0) 379 380 enum fuse_opcode { 381 FUSE_LOOKUP = 1, 382 FUSE_FORGET = 2, /* no reply */ 383 FUSE_GETATTR = 3, 384 FUSE_SETATTR = 4, 385 FUSE_READLINK = 5, 386 FUSE_SYMLINK = 6, 387 FUSE_MKNOD = 8, 388 FUSE_MKDIR = 9, 389 FUSE_UNLINK = 10, 390 FUSE_RMDIR = 11, 391 FUSE_RENAME = 12, 392 FUSE_LINK = 13, 393 FUSE_OPEN = 14, 394 FUSE_READ = 15, 395 FUSE_WRITE = 16, 396 FUSE_STATFS = 17, 397 FUSE_RELEASE = 18, 398 FUSE_FSYNC = 20, 399 FUSE_SETXATTR = 21, 400 FUSE_GETXATTR = 22, 401 FUSE_LISTXATTR = 23, 402 FUSE_REMOVEXATTR = 24, 403 FUSE_FLUSH = 25, 404 FUSE_INIT = 26, 405 FUSE_OPENDIR = 27, 406 FUSE_READDIR = 28, 407 FUSE_RELEASEDIR = 29, 408 FUSE_FSYNCDIR = 30, 409 FUSE_GETLK = 31, 410 FUSE_SETLK = 32, 411 FUSE_SETLKW = 33, 412 FUSE_ACCESS = 34, 413 FUSE_CREATE = 35, 414 FUSE_INTERRUPT = 36, 415 FUSE_BMAP = 37, 416 FUSE_DESTROY = 38, 417 FUSE_IOCTL = 39, 418 FUSE_POLL = 40, 419 FUSE_NOTIFY_REPLY = 41, 420 FUSE_BATCH_FORGET = 42, 421 FUSE_FALLOCATE = 43, 422 FUSE_READDIRPLUS = 44, 423 FUSE_RENAME2 = 45, 424 FUSE_LSEEK = 46, 425 FUSE_COPY_FILE_RANGE = 47, 426 427 /* Android specific operations */ 428 FUSE_CANONICAL_PATH = 2016, 429 430 /* CUSE specific operations */ 431 CUSE_INIT = 4096 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 #define FUSE_ACTION_KEEP 0 461 #define FUSE_ACTION_REMOVE 1 462 #define FUSE_ACTION_REPLACE 2 463 464 struct fuse_entry_bpf_out { 465 uint64_t backing_action; 466 uint64_t backing_fd; 467 uint64_t bpf_action; 468 uint64_t bpf_fd; 469 }; 470 471 struct fuse_forget_in { 472 uint64_t nlookup; 473 }; 474 475 struct fuse_forget_one { 476 uint64_t nodeid; 477 uint64_t nlookup; 478 }; 479 480 struct fuse_batch_forget_in { 481 uint32_t count; 482 uint32_t dummy; 483 }; 484 485 struct fuse_getattr_in { 486 uint32_t getattr_flags; 487 uint32_t dummy; 488 uint64_t fh; 489 }; 490 491 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 492 493 struct fuse_attr_out { 494 uint64_t attr_valid; /* Cache timeout for the attributes */ 495 uint32_t attr_valid_nsec; 496 uint32_t dummy; 497 struct fuse_attr attr; 498 }; 499 500 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 501 502 struct fuse_mknod_in { 503 uint32_t mode; 504 uint32_t rdev; 505 uint32_t umask; 506 uint32_t padding; 507 }; 508 509 struct fuse_mkdir_in { 510 uint32_t mode; 511 uint32_t umask; 512 }; 513 514 struct fuse_rename_in { 515 uint64_t newdir; 516 }; 517 518 struct fuse_rename2_in { 519 uint64_t newdir; 520 uint32_t flags; 521 uint32_t padding; 522 }; 523 524 struct fuse_link_in { 525 uint64_t oldnodeid; 526 }; 527 528 struct fuse_setattr_in { 529 uint32_t valid; 530 uint32_t padding; 531 uint64_t fh; 532 uint64_t size; 533 uint64_t lock_owner; 534 uint64_t atime; 535 uint64_t mtime; 536 uint64_t ctime; 537 uint32_t atimensec; 538 uint32_t mtimensec; 539 uint32_t ctimensec; 540 uint32_t mode; 541 uint32_t unused4; 542 uint32_t uid; 543 uint32_t gid; 544 uint32_t unused5; 545 }; 546 547 struct fuse_open_in { 548 uint32_t flags; 549 uint32_t unused; 550 }; 551 552 struct fuse_create_in { 553 uint32_t flags; 554 uint32_t mode; 555 uint32_t umask; 556 uint32_t padding; 557 }; 558 559 struct fuse_open_out { 560 uint64_t fh; 561 uint32_t open_flags; 562 uint32_t passthrough_fh; 563 }; 564 565 struct fuse_release_in { 566 uint64_t fh; 567 uint32_t flags; 568 uint32_t release_flags; 569 uint64_t lock_owner; 570 }; 571 572 struct fuse_flush_in { 573 uint64_t fh; 574 uint32_t unused; 575 uint32_t padding; 576 uint64_t lock_owner; 577 }; 578 579 struct fuse_read_in { 580 uint64_t fh; 581 uint64_t offset; 582 uint32_t size; 583 uint32_t read_flags; 584 uint64_t lock_owner; 585 uint32_t flags; 586 uint32_t padding; 587 }; 588 589 struct fuse_passthrough_out_v0 { 590 uint32_t fd; 591 /* For future implementation */ 592 uint32_t len; 593 void * vec; 594 }; 595 596 #define FUSE_COMPAT_WRITE_IN_SIZE 24 597 598 struct fuse_write_in { 599 uint64_t fh; 600 uint64_t offset; 601 uint32_t size; 602 uint32_t write_flags; 603 uint64_t lock_owner; 604 uint32_t flags; 605 uint32_t padding; 606 }; 607 608 struct fuse_write_out { 609 uint32_t size; 610 uint32_t padding; 611 }; 612 613 #define FUSE_COMPAT_STATFS_SIZE 48 614 615 struct fuse_statfs_out { 616 struct fuse_kstatfs st; 617 }; 618 619 struct fuse_fsync_in { 620 uint64_t fh; 621 uint32_t fsync_flags; 622 uint32_t padding; 623 }; 624 625 struct fuse_setxattr_in { 626 uint32_t size; 627 uint32_t flags; 628 }; 629 630 struct fuse_getxattr_in { 631 uint32_t size; 632 uint32_t padding; 633 }; 634 635 struct fuse_getxattr_out { 636 uint32_t size; 637 uint32_t padding; 638 }; 639 640 struct fuse_lk_in { 641 uint64_t fh; 642 uint64_t owner; 643 struct fuse_file_lock lk; 644 uint32_t lk_flags; 645 uint32_t padding; 646 }; 647 648 struct fuse_lk_out { 649 struct fuse_file_lock lk; 650 }; 651 652 struct fuse_access_in { 653 uint32_t mask; 654 uint32_t padding; 655 }; 656 657 struct fuse_init_in { 658 uint32_t major; 659 uint32_t minor; 660 uint32_t max_readahead; 661 uint32_t flags; 662 }; 663 664 #define FUSE_COMPAT_INIT_OUT_SIZE 8 665 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 666 667 struct fuse_init_out { 668 uint32_t major; 669 uint32_t minor; 670 uint32_t max_readahead; 671 uint32_t flags; 672 uint16_t max_background; 673 uint16_t congestion_threshold; 674 uint32_t max_write; 675 uint32_t time_gran; 676 uint16_t max_pages; 677 uint16_t padding; 678 uint32_t unused[8]; 679 }; 680 681 #define CUSE_INIT_INFO_MAX 4096 682 683 struct cuse_init_in { 684 uint32_t major; 685 uint32_t minor; 686 uint32_t unused; 687 uint32_t flags; 688 }; 689 690 struct cuse_init_out { 691 uint32_t major; 692 uint32_t minor; 693 uint32_t unused; 694 uint32_t flags; 695 uint32_t max_read; 696 uint32_t max_write; 697 uint32_t dev_major; /* chardev major */ 698 uint32_t dev_minor; /* chardev minor */ 699 uint32_t spare[10]; 700 }; 701 702 struct fuse_interrupt_in { 703 uint64_t unique; 704 }; 705 706 struct fuse_bmap_in { 707 uint64_t block; 708 uint32_t blocksize; 709 uint32_t padding; 710 }; 711 712 struct fuse_bmap_out { 713 uint64_t block; 714 }; 715 716 struct fuse_ioctl_in { 717 uint64_t fh; 718 uint32_t flags; 719 uint32_t cmd; 720 uint64_t arg; 721 uint32_t in_size; 722 uint32_t out_size; 723 }; 724 725 struct fuse_ioctl_iovec { 726 uint64_t base; 727 uint64_t len; 728 }; 729 730 struct fuse_ioctl_out { 731 int32_t result; 732 uint32_t flags; 733 uint32_t in_iovs; 734 uint32_t out_iovs; 735 }; 736 737 struct fuse_poll_in { 738 uint64_t fh; 739 uint64_t kh; 740 uint32_t flags; 741 uint32_t events; 742 }; 743 744 struct fuse_poll_out { 745 uint32_t revents; 746 uint32_t padding; 747 }; 748 749 struct fuse_notify_poll_wakeup_out { 750 uint64_t kh; 751 }; 752 753 struct fuse_fallocate_in { 754 uint64_t fh; 755 uint64_t offset; 756 uint64_t length; 757 uint32_t mode; 758 uint32_t padding; 759 }; 760 761 struct fuse_in_header { 762 uint32_t len; 763 uint32_t opcode; 764 uint64_t unique; 765 uint64_t nodeid; 766 uint32_t uid; 767 uint32_t gid; 768 uint32_t pid; 769 uint32_t padding; 770 }; 771 772 struct fuse_out_header { 773 uint32_t len; 774 int32_t error; 775 uint64_t unique; 776 }; 777 778 struct fuse_dirent { 779 uint64_t ino; 780 uint64_t off; 781 uint32_t namelen; 782 uint32_t type; 783 char name[]; 784 }; 785 786 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 787 #define FUSE_DIRENT_ALIGN(x) \ 788 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 789 #define FUSE_DIRENT_SIZE(d) \ 790 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 791 792 struct fuse_direntplus { 793 struct fuse_entry_out entry_out; 794 struct fuse_dirent dirent; 795 }; 796 797 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 798 offsetof(struct fuse_direntplus, dirent.name) 799 #define FUSE_DIRENTPLUS_SIZE(d) \ 800 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 801 802 struct fuse_notify_inval_inode_out { 803 uint64_t ino; 804 int64_t off; 805 int64_t len; 806 }; 807 808 struct fuse_notify_inval_entry_out { 809 uint64_t parent; 810 uint32_t namelen; 811 uint32_t padding; 812 }; 813 814 struct fuse_notify_delete_out { 815 uint64_t parent; 816 uint64_t child; 817 uint32_t namelen; 818 uint32_t padding; 819 }; 820 821 struct fuse_notify_store_out { 822 uint64_t nodeid; 823 uint64_t offset; 824 uint32_t size; 825 uint32_t padding; 826 }; 827 828 struct fuse_notify_retrieve_out { 829 uint64_t notify_unique; 830 uint64_t nodeid; 831 uint64_t offset; 832 uint32_t size; 833 uint32_t padding; 834 }; 835 836 /* Matches the size of fuse_write_in */ 837 struct fuse_notify_retrieve_in { 838 uint64_t dummy1; 839 uint64_t offset; 840 uint32_t size; 841 uint32_t dummy2; 842 uint64_t dummy3; 843 uint64_t dummy4; 844 }; 845 846 /* Device ioctls: */ 847 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 848 #define FUSE_DEV_IOC_PASSTHROUGH_OPEN_V0 _IOW(229, 1, struct fuse_passthrough_out_v0) 849 #define FUSE_DEV_IOC_PASSTHROUGH_OPEN_V1 _IOW(229, 127, struct fuse_passthrough_out_v0) 850 #define FUSE_DEV_IOC_PASSTHROUGH_OPEN_V2 _IOW(229, 126, uint32_t) 851 852 struct fuse_lseek_in { 853 uint64_t fh; 854 uint64_t offset; 855 uint32_t whence; 856 uint32_t padding; 857 }; 858 859 struct fuse_lseek_out { 860 uint64_t offset; 861 }; 862 863 struct fuse_copy_file_range_in { 864 uint64_t fh_in; 865 uint64_t off_in; 866 uint64_t nodeid_out; 867 uint64_t fh_out; 868 uint64_t off_out; 869 uint64_t len; 870 uint64_t flags; 871 }; 872 873 /** Export fuse_args only for bpf */ 874 #ifdef __KERNEL__ 875 struct fuse_mount; 876 877 /** One input argument of a request */ 878 struct fuse_in_arg { 879 unsigned size; 880 const void *value; 881 }; 882 883 /** One output argument of a request */ 884 struct fuse_arg { 885 unsigned size; 886 void *value; 887 }; 888 889 struct fuse_args { 890 uint64_t nodeid; 891 uint32_t opcode; 892 unsigned short in_numargs; 893 unsigned short out_numargs; 894 int force:1; 895 int noreply:1; 896 int nocreds:1; 897 int in_pages:1; 898 int out_pages:1; 899 int out_argvar:1; 900 int page_zeroing:1; 901 int page_replace:1; 902 int may_block:1; 903 struct fuse_in_arg in_args[5]; 904 struct fuse_arg out_args[3]; 905 void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error); 906 907 /* Path used for completing d_canonical_path */ 908 struct path *canonical_path; 909 }; 910 #endif 911 912 #define FUSE_BPF_USER_FILTER 1 913 #define FUSE_BPF_BACKING 2 914 #define FUSE_BPF_POST_FILTER 4 915 916 #define FUSE_OPCODE_FILTER 0x0ffff 917 #define FUSE_PREFILTER 0x10000 918 #define FUSE_POSTFILTER 0x20000 919 920 #endif /* _LINUX_FUSE_H */ 921