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 * 7.33 180 * - add FUSE_HANDLE_KILLPRIV_V2, FUSE_WRITE_KILL_SUIDGID, FATTR_KILL_SUIDGID 181 * - add FUSE_OPEN_KILL_SUIDGID 182 */ 183 184 #ifndef _LINUX_FUSE_H 185 #define _LINUX_FUSE_H 186 187 #include <stdint.h> 188 189 /* 190 * Version negotiation: 191 * 192 * Both the kernel and userspace send the version they support in the 193 * INIT request and reply respectively. 194 * 195 * If the major versions match then both shall use the smallest 196 * of the two minor versions for communication. 197 * 198 * If the kernel supports a larger major version, then userspace shall 199 * reply with the major version it supports, ignore the rest of the 200 * INIT message and expect a new INIT message from the kernel with a 201 * matching major version. 202 * 203 * If the library supports a larger major version, then it shall fall 204 * back to the major protocol version sent by the kernel for 205 * communication and reply with that major version (and an arbitrary 206 * supported minor version). 207 */ 208 209 /** Version number of this interface */ 210 #define FUSE_KERNEL_VERSION 7 211 212 /** Minor version number of this interface */ 213 #define FUSE_KERNEL_MINOR_VERSION 33 214 215 /** The node ID of the root inode */ 216 #define FUSE_ROOT_ID 1 217 218 /* Make sure all structures are padded to 64bit boundary, so 32bit 219 userspace works under 64bit kernels */ 220 221 struct fuse_attr { 222 uint64_t ino; 223 uint64_t size; 224 uint64_t blocks; 225 uint64_t atime; 226 uint64_t mtime; 227 uint64_t ctime; 228 uint32_t atimensec; 229 uint32_t mtimensec; 230 uint32_t ctimensec; 231 uint32_t mode; 232 uint32_t nlink; 233 uint32_t uid; 234 uint32_t gid; 235 uint32_t rdev; 236 uint32_t blksize; 237 uint32_t flags; 238 }; 239 240 struct fuse_kstatfs { 241 uint64_t blocks; 242 uint64_t bfree; 243 uint64_t bavail; 244 uint64_t files; 245 uint64_t ffree; 246 uint32_t bsize; 247 uint32_t namelen; 248 uint32_t frsize; 249 uint32_t padding; 250 uint32_t spare[6]; 251 }; 252 253 struct fuse_file_lock { 254 uint64_t start; 255 uint64_t end; 256 uint32_t type; 257 uint32_t pid; /* tgid */ 258 }; 259 260 /** 261 * Bitmasks for fuse_setattr_in.valid 262 */ 263 #define FATTR_MODE (1 << 0) 264 #define FATTR_UID (1 << 1) 265 #define FATTR_GID (1 << 2) 266 #define FATTR_SIZE (1 << 3) 267 #define FATTR_ATIME (1 << 4) 268 #define FATTR_MTIME (1 << 5) 269 #define FATTR_FH (1 << 6) 270 #define FATTR_ATIME_NOW (1 << 7) 271 #define FATTR_MTIME_NOW (1 << 8) 272 #define FATTR_LOCKOWNER (1 << 9) 273 #define FATTR_CTIME (1 << 10) 274 #define FATTR_KILL_SUIDGID (1 << 11) 275 276 /** 277 * Flags returned by the OPEN request 278 * 279 * FOPEN_DIRECT_IO: bypass page cache for this open file 280 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 281 * FOPEN_NONSEEKABLE: the file is not seekable 282 * FOPEN_CACHE_DIR: allow caching this directory 283 * FOPEN_STREAM: the file is stream-like (no file position at all) 284 */ 285 #define FOPEN_DIRECT_IO (1 << 0) 286 #define FOPEN_KEEP_CACHE (1 << 1) 287 #define FOPEN_NONSEEKABLE (1 << 2) 288 #define FOPEN_CACHE_DIR (1 << 3) 289 #define FOPEN_STREAM (1 << 4) 290 291 /** 292 * INIT request/reply flags 293 * 294 * FUSE_ASYNC_READ: asynchronous read requests 295 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 296 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 297 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 298 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 299 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 300 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 301 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 302 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 303 * FUSE_SPLICE_READ: kernel supports splice read on the device 304 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 305 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 306 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 307 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 308 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 309 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 310 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 311 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 312 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 313 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 314 * FUSE_POSIX_ACL: filesystem supports posix acls 315 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 316 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 317 * FUSE_CACHE_SYMLINKS: cache READLINK responses 318 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 319 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 320 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for 321 * foffset and moffset fields in struct 322 * fuse_setupmapping_out and fuse_removemapping_one. 323 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts 324 * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc. 325 * Upon write/truncate suid/sgid is only killed if caller 326 * does not have CAP_FSETID. Additionally upon 327 * write/truncate sgid is killed only if file has group 328 * execute permission. (Same as Linux VFS behavior). 329 */ 330 #define FUSE_ASYNC_READ (1 << 0) 331 #define FUSE_POSIX_LOCKS (1 << 1) 332 #define FUSE_FILE_OPS (1 << 2) 333 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 334 #define FUSE_EXPORT_SUPPORT (1 << 4) 335 #define FUSE_BIG_WRITES (1 << 5) 336 #define FUSE_DONT_MASK (1 << 6) 337 #define FUSE_SPLICE_WRITE (1 << 7) 338 #define FUSE_SPLICE_MOVE (1 << 8) 339 #define FUSE_SPLICE_READ (1 << 9) 340 #define FUSE_FLOCK_LOCKS (1 << 10) 341 #define FUSE_HAS_IOCTL_DIR (1 << 11) 342 #define FUSE_AUTO_INVAL_DATA (1 << 12) 343 #define FUSE_DO_READDIRPLUS (1 << 13) 344 #define FUSE_READDIRPLUS_AUTO (1 << 14) 345 #define FUSE_ASYNC_DIO (1 << 15) 346 #define FUSE_WRITEBACK_CACHE (1 << 16) 347 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 348 #define FUSE_PARALLEL_DIROPS (1 << 18) 349 #define FUSE_HANDLE_KILLPRIV (1 << 19) 350 #define FUSE_POSIX_ACL (1 << 20) 351 #define FUSE_ABORT_ERROR (1 << 21) 352 #define FUSE_MAX_PAGES (1 << 22) 353 #define FUSE_CACHE_SYMLINKS (1 << 23) 354 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 355 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 356 #define FUSE_MAP_ALIGNMENT (1 << 26) 357 #define FUSE_SUBMOUNTS (1 << 27) 358 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) 359 360 /** 361 * CUSE INIT request/reply flags 362 * 363 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 364 */ 365 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 366 367 /** 368 * Release flags 369 */ 370 #define FUSE_RELEASE_FLUSH (1 << 0) 371 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 372 373 /** 374 * Getattr flags 375 */ 376 #define FUSE_GETATTR_FH (1 << 0) 377 378 /** 379 * Lock flags 380 */ 381 #define FUSE_LK_FLOCK (1 << 0) 382 383 /** 384 * WRITE flags 385 * 386 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 387 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 388 * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits 389 */ 390 #define FUSE_WRITE_CACHE (1 << 0) 391 #define FUSE_WRITE_LOCKOWNER (1 << 1) 392 #define FUSE_WRITE_KILL_SUIDGID (1 << 2) 393 394 /* Obsolete alias; this flag implies killing suid/sgid only. */ 395 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID 396 397 /** 398 * Read flags 399 */ 400 #define FUSE_READ_LOCKOWNER (1 << 1) 401 402 /** 403 * Ioctl flags 404 * 405 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 406 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 407 * FUSE_IOCTL_RETRY: retry with new iovecs 408 * FUSE_IOCTL_32BIT: 32bit ioctl 409 * FUSE_IOCTL_DIR: is a directory 410 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 411 * 412 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 413 */ 414 #define FUSE_IOCTL_COMPAT (1 << 0) 415 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 416 #define FUSE_IOCTL_RETRY (1 << 2) 417 #define FUSE_IOCTL_32BIT (1 << 3) 418 #define FUSE_IOCTL_DIR (1 << 4) 419 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 420 421 #define FUSE_IOCTL_MAX_IOV 256 422 423 /** 424 * Poll flags 425 * 426 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 427 */ 428 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 429 430 /** 431 * Fsync flags 432 * 433 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 434 */ 435 #define FUSE_FSYNC_FDATASYNC (1 << 0) 436 437 /** 438 * fuse_attr flags 439 * 440 * FUSE_ATTR_SUBMOUNT: Object is a submount root 441 */ 442 #define FUSE_ATTR_SUBMOUNT (1 << 0) 443 444 /** 445 * Open flags 446 * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable 447 */ 448 #define FUSE_OPEN_KILL_SUIDGID (1 << 0) 449 450 enum fuse_opcode { 451 FUSE_LOOKUP = 1, 452 FUSE_FORGET = 2, /* no reply */ 453 FUSE_GETATTR = 3, 454 FUSE_SETATTR = 4, 455 FUSE_READLINK = 5, 456 FUSE_SYMLINK = 6, 457 FUSE_MKNOD = 8, 458 FUSE_MKDIR = 9, 459 FUSE_UNLINK = 10, 460 FUSE_RMDIR = 11, 461 FUSE_RENAME = 12, 462 FUSE_LINK = 13, 463 FUSE_OPEN = 14, 464 FUSE_READ = 15, 465 FUSE_WRITE = 16, 466 FUSE_STATFS = 17, 467 FUSE_RELEASE = 18, 468 FUSE_FSYNC = 20, 469 FUSE_SETXATTR = 21, 470 FUSE_GETXATTR = 22, 471 FUSE_LISTXATTR = 23, 472 FUSE_REMOVEXATTR = 24, 473 FUSE_FLUSH = 25, 474 FUSE_INIT = 26, 475 FUSE_OPENDIR = 27, 476 FUSE_READDIR = 28, 477 FUSE_RELEASEDIR = 29, 478 FUSE_FSYNCDIR = 30, 479 FUSE_GETLK = 31, 480 FUSE_SETLK = 32, 481 FUSE_SETLKW = 33, 482 FUSE_ACCESS = 34, 483 FUSE_CREATE = 35, 484 FUSE_INTERRUPT = 36, 485 FUSE_BMAP = 37, 486 FUSE_DESTROY = 38, 487 FUSE_IOCTL = 39, 488 FUSE_POLL = 40, 489 FUSE_NOTIFY_REPLY = 41, 490 FUSE_BATCH_FORGET = 42, 491 FUSE_FALLOCATE = 43, 492 FUSE_READDIRPLUS = 44, 493 FUSE_RENAME2 = 45, 494 FUSE_LSEEK = 46, 495 FUSE_COPY_FILE_RANGE = 47, 496 FUSE_SETUPMAPPING = 48, 497 FUSE_REMOVEMAPPING = 49, 498 499 /* CUSE specific operations */ 500 CUSE_INIT = 4096, 501 502 /* Reserved opcodes: helpful to detect structure endian-ness */ 503 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 504 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 505 }; 506 507 enum fuse_notify_code { 508 FUSE_NOTIFY_POLL = 1, 509 FUSE_NOTIFY_INVAL_INODE = 2, 510 FUSE_NOTIFY_INVAL_ENTRY = 3, 511 FUSE_NOTIFY_STORE = 4, 512 FUSE_NOTIFY_RETRIEVE = 5, 513 FUSE_NOTIFY_DELETE = 6, 514 FUSE_NOTIFY_CODE_MAX, 515 }; 516 517 /* The read buffer is required to be at least 8k, but may be much larger */ 518 #define FUSE_MIN_READ_BUFFER 8192 519 520 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 521 522 struct fuse_entry_out { 523 uint64_t nodeid; /* Inode ID */ 524 uint64_t generation; /* Inode generation: nodeid:gen must 525 be unique for the fs's lifetime */ 526 uint64_t entry_valid; /* Cache timeout for the name */ 527 uint64_t attr_valid; /* Cache timeout for the attributes */ 528 uint32_t entry_valid_nsec; 529 uint32_t attr_valid_nsec; 530 struct fuse_attr attr; 531 }; 532 533 struct fuse_forget_in { 534 uint64_t nlookup; 535 }; 536 537 struct fuse_forget_one { 538 uint64_t nodeid; 539 uint64_t nlookup; 540 }; 541 542 struct fuse_batch_forget_in { 543 uint32_t count; 544 uint32_t dummy; 545 }; 546 547 struct fuse_getattr_in { 548 uint32_t getattr_flags; 549 uint32_t dummy; 550 uint64_t fh; 551 }; 552 553 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 554 555 struct fuse_attr_out { 556 uint64_t attr_valid; /* Cache timeout for the attributes */ 557 uint32_t attr_valid_nsec; 558 uint32_t dummy; 559 struct fuse_attr attr; 560 }; 561 562 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 563 564 struct fuse_mknod_in { 565 uint32_t mode; 566 uint32_t rdev; 567 uint32_t umask; 568 uint32_t padding; 569 }; 570 571 struct fuse_mkdir_in { 572 uint32_t mode; 573 uint32_t umask; 574 }; 575 576 struct fuse_rename_in { 577 uint64_t newdir; 578 }; 579 580 struct fuse_rename2_in { 581 uint64_t newdir; 582 uint32_t flags; 583 uint32_t padding; 584 }; 585 586 struct fuse_link_in { 587 uint64_t oldnodeid; 588 }; 589 590 struct fuse_setattr_in { 591 uint32_t valid; 592 uint32_t padding; 593 uint64_t fh; 594 uint64_t size; 595 uint64_t lock_owner; 596 uint64_t atime; 597 uint64_t mtime; 598 uint64_t ctime; 599 uint32_t atimensec; 600 uint32_t mtimensec; 601 uint32_t ctimensec; 602 uint32_t mode; 603 uint32_t unused4; 604 uint32_t uid; 605 uint32_t gid; 606 uint32_t unused5; 607 }; 608 609 struct fuse_open_in { 610 uint32_t flags; 611 uint32_t open_flags; /* FUSE_OPEN_... */ 612 }; 613 614 struct fuse_create_in { 615 uint32_t flags; 616 uint32_t mode; 617 uint32_t umask; 618 uint32_t open_flags; /* FUSE_OPEN_... */ 619 }; 620 621 struct fuse_open_out { 622 uint64_t fh; 623 uint32_t open_flags; 624 uint32_t padding; 625 }; 626 627 struct fuse_release_in { 628 uint64_t fh; 629 uint32_t flags; 630 uint32_t release_flags; 631 uint64_t lock_owner; 632 }; 633 634 struct fuse_flush_in { 635 uint64_t fh; 636 uint32_t unused; 637 uint32_t padding; 638 uint64_t lock_owner; 639 }; 640 641 struct fuse_read_in { 642 uint64_t fh; 643 uint64_t offset; 644 uint32_t size; 645 uint32_t read_flags; 646 uint64_t lock_owner; 647 uint32_t flags; 648 uint32_t padding; 649 }; 650 651 #define FUSE_COMPAT_WRITE_IN_SIZE 24 652 653 struct fuse_write_in { 654 uint64_t fh; 655 uint64_t offset; 656 uint32_t size; 657 uint32_t write_flags; 658 uint64_t lock_owner; 659 uint32_t flags; 660 uint32_t padding; 661 }; 662 663 struct fuse_write_out { 664 uint32_t size; 665 uint32_t padding; 666 }; 667 668 #define FUSE_COMPAT_STATFS_SIZE 48 669 670 struct fuse_statfs_out { 671 struct fuse_kstatfs st; 672 }; 673 674 struct fuse_fsync_in { 675 uint64_t fh; 676 uint32_t fsync_flags; 677 uint32_t padding; 678 }; 679 680 struct fuse_setxattr_in { 681 uint32_t size; 682 uint32_t flags; 683 }; 684 685 struct fuse_getxattr_in { 686 uint32_t size; 687 uint32_t padding; 688 }; 689 690 struct fuse_getxattr_out { 691 uint32_t size; 692 uint32_t padding; 693 }; 694 695 struct fuse_lk_in { 696 uint64_t fh; 697 uint64_t owner; 698 struct fuse_file_lock lk; 699 uint32_t lk_flags; 700 uint32_t padding; 701 }; 702 703 struct fuse_lk_out { 704 struct fuse_file_lock lk; 705 }; 706 707 struct fuse_access_in { 708 uint32_t mask; 709 uint32_t padding; 710 }; 711 712 struct fuse_init_in { 713 uint32_t major; 714 uint32_t minor; 715 uint32_t max_readahead; 716 uint32_t flags; 717 }; 718 719 #define FUSE_COMPAT_INIT_OUT_SIZE 8 720 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 721 722 struct fuse_init_out { 723 uint32_t major; 724 uint32_t minor; 725 uint32_t max_readahead; 726 uint32_t flags; 727 uint16_t max_background; 728 uint16_t congestion_threshold; 729 uint32_t max_write; 730 uint32_t time_gran; 731 uint16_t max_pages; 732 uint16_t map_alignment; 733 uint32_t unused[8]; 734 }; 735 736 #define CUSE_INIT_INFO_MAX 4096 737 738 struct cuse_init_in { 739 uint32_t major; 740 uint32_t minor; 741 uint32_t unused; 742 uint32_t flags; 743 }; 744 745 struct cuse_init_out { 746 uint32_t major; 747 uint32_t minor; 748 uint32_t unused; 749 uint32_t flags; 750 uint32_t max_read; 751 uint32_t max_write; 752 uint32_t dev_major; /* chardev major */ 753 uint32_t dev_minor; /* chardev minor */ 754 uint32_t spare[10]; 755 }; 756 757 struct fuse_interrupt_in { 758 uint64_t unique; 759 }; 760 761 struct fuse_bmap_in { 762 uint64_t block; 763 uint32_t blocksize; 764 uint32_t padding; 765 }; 766 767 struct fuse_bmap_out { 768 uint64_t block; 769 }; 770 771 struct fuse_ioctl_in { 772 uint64_t fh; 773 uint32_t flags; 774 uint32_t cmd; 775 uint64_t arg; 776 uint32_t in_size; 777 uint32_t out_size; 778 }; 779 780 struct fuse_ioctl_iovec { 781 uint64_t base; 782 uint64_t len; 783 }; 784 785 struct fuse_ioctl_out { 786 int32_t result; 787 uint32_t flags; 788 uint32_t in_iovs; 789 uint32_t out_iovs; 790 }; 791 792 struct fuse_poll_in { 793 uint64_t fh; 794 uint64_t kh; 795 uint32_t flags; 796 uint32_t events; 797 }; 798 799 struct fuse_poll_out { 800 uint32_t revents; 801 uint32_t padding; 802 }; 803 804 struct fuse_notify_poll_wakeup_out { 805 uint64_t kh; 806 }; 807 808 struct fuse_fallocate_in { 809 uint64_t fh; 810 uint64_t offset; 811 uint64_t length; 812 uint32_t mode; 813 uint32_t padding; 814 }; 815 816 struct fuse_in_header { 817 uint32_t len; 818 uint32_t opcode; 819 uint64_t unique; 820 uint64_t nodeid; 821 uint32_t uid; 822 uint32_t gid; 823 uint32_t pid; 824 uint32_t padding; 825 }; 826 827 struct fuse_out_header { 828 uint32_t len; 829 int32_t error; 830 uint64_t unique; 831 }; 832 833 struct fuse_dirent { 834 uint64_t ino; 835 uint64_t off; 836 uint32_t namelen; 837 uint32_t type; 838 char name[]; 839 }; 840 841 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 842 #define FUSE_DIRENT_ALIGN(x) \ 843 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 844 #define FUSE_DIRENT_SIZE(d) \ 845 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 846 847 struct fuse_direntplus { 848 struct fuse_entry_out entry_out; 849 struct fuse_dirent dirent; 850 }; 851 852 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 853 offsetof(struct fuse_direntplus, dirent.name) 854 #define FUSE_DIRENTPLUS_SIZE(d) \ 855 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 856 857 struct fuse_notify_inval_inode_out { 858 uint64_t ino; 859 int64_t off; 860 int64_t len; 861 }; 862 863 struct fuse_notify_inval_entry_out { 864 uint64_t parent; 865 uint32_t namelen; 866 uint32_t padding; 867 }; 868 869 struct fuse_notify_delete_out { 870 uint64_t parent; 871 uint64_t child; 872 uint32_t namelen; 873 uint32_t padding; 874 }; 875 876 struct fuse_notify_store_out { 877 uint64_t nodeid; 878 uint64_t offset; 879 uint32_t size; 880 uint32_t padding; 881 }; 882 883 struct fuse_notify_retrieve_out { 884 uint64_t notify_unique; 885 uint64_t nodeid; 886 uint64_t offset; 887 uint32_t size; 888 uint32_t padding; 889 }; 890 891 /* Matches the size of fuse_write_in */ 892 struct fuse_notify_retrieve_in { 893 uint64_t dummy1; 894 uint64_t offset; 895 uint32_t size; 896 uint32_t dummy2; 897 uint64_t dummy3; 898 uint64_t dummy4; 899 }; 900 901 /* Device ioctls: */ 902 #define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t) 903 904 struct fuse_lseek_in { 905 uint64_t fh; 906 uint64_t offset; 907 uint32_t whence; 908 uint32_t padding; 909 }; 910 911 struct fuse_lseek_out { 912 uint64_t offset; 913 }; 914 915 struct fuse_copy_file_range_in { 916 uint64_t fh_in; 917 uint64_t off_in; 918 uint64_t nodeid_out; 919 uint64_t fh_out; 920 uint64_t off_out; 921 uint64_t len; 922 uint64_t flags; 923 }; 924 925 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) 926 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1) 927 struct fuse_setupmapping_in { 928 /* An already open handle */ 929 uint64_t fh; 930 /* Offset into the file to start the mapping */ 931 uint64_t foffset; 932 /* Length of mapping required */ 933 uint64_t len; 934 /* Flags, FUSE_SETUPMAPPING_FLAG_* */ 935 uint64_t flags; 936 /* Offset in Memory Window */ 937 uint64_t moffset; 938 }; 939 940 struct fuse_removemapping_in { 941 /* number of fuse_removemapping_one follows */ 942 uint32_t count; 943 }; 944 945 struct fuse_removemapping_one { 946 /* Offset into the dax window start the unmapping */ 947 uint64_t moffset; 948 /* Length of mapping required */ 949 uint64_t len; 950 }; 951 952 #define FUSE_REMOVEMAPPING_MAX_ENTRY \ 953 (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) 954 955 #endif /* _LINUX_FUSE_H */ 956