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 * 7.1: 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 #ifdef __KERNEL__ 188 #include <linux/types.h> 189 #else 190 #include <stdint.h> 191 #endif 192 193 /* 194 * Version negotiation: 195 * 196 * Both the kernel and userspace send the version they support in the 197 * INIT request and reply respectively. 198 * 199 * If the major versions match then both shall use the smallest 200 * of the two minor versions for communication. 201 * 202 * If the kernel supports a larger major version, then userspace shall 203 * reply with the major version it supports, ignore the rest of the 204 * INIT message and expect a new INIT message from the kernel with a 205 * matching major version. 206 * 207 * If the library supports a larger major version, then it shall fall 208 * back to the major protocol version sent by the kernel for 209 * communication and reply with that major version (and an arbitrary 210 * supported minor version). 211 */ 212 213 /** Version number of this interface */ 214 #define FUSE_KERNEL_VERSION 7 215 216 /** Minor version number of this interface */ 217 #define FUSE_KERNEL_MINOR_VERSION 33 218 219 /** The node ID of the root inode */ 220 #define FUSE_ROOT_ID 1 221 222 /* Make sure all structures are padded to 64bit boundary, so 32bit 223 userspace works under 64bit kernels */ 224 225 struct fuse_attr { 226 uint64_t ino; 227 uint64_t size; 228 uint64_t blocks; 229 uint64_t atime; 230 uint64_t mtime; 231 uint64_t ctime; 232 uint32_t atimensec; 233 uint32_t mtimensec; 234 uint32_t ctimensec; 235 uint32_t mode; 236 uint32_t nlink; 237 uint32_t uid; 238 uint32_t gid; 239 uint32_t rdev; 240 uint32_t blksize; 241 uint32_t flags; 242 }; 243 244 struct fuse_kstatfs { 245 uint64_t blocks; 246 uint64_t bfree; 247 uint64_t bavail; 248 uint64_t files; 249 uint64_t ffree; 250 uint32_t bsize; 251 uint32_t namelen; 252 uint32_t frsize; 253 uint32_t padding; 254 uint32_t spare[6]; 255 }; 256 257 struct fuse_file_lock { 258 uint64_t start; 259 uint64_t end; 260 uint32_t type; 261 uint32_t pid; /* tgid */ 262 }; 263 264 /** 265 * Bitmasks for fuse_setattr_in.valid 266 */ 267 #define FATTR_MODE (1 << 0) 268 #define FATTR_UID (1 << 1) 269 #define FATTR_GID (1 << 2) 270 #define FATTR_SIZE (1 << 3) 271 #define FATTR_ATIME (1 << 4) 272 #define FATTR_MTIME (1 << 5) 273 #define FATTR_FH (1 << 6) 274 #define FATTR_ATIME_NOW (1 << 7) 275 #define FATTR_MTIME_NOW (1 << 8) 276 #define FATTR_LOCKOWNER (1 << 9) 277 #define FATTR_CTIME (1 << 10) 278 #define FATTR_KILL_SUIDGID (1 << 11) 279 280 /** 281 * Flags returned by the OPEN request 282 * 283 * FOPEN_DIRECT_IO: bypass page cache for this open file 284 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 285 * FOPEN_NONSEEKABLE: the file is not seekable 286 * FOPEN_CACHE_DIR: allow caching this directory 287 * FOPEN_STREAM: the file is stream-like (no file position at all) 288 */ 289 #define FOPEN_DIRECT_IO (1 << 0) 290 #define FOPEN_KEEP_CACHE (1 << 1) 291 #define FOPEN_NONSEEKABLE (1 << 2) 292 #define FOPEN_CACHE_DIR (1 << 3) 293 #define FOPEN_STREAM (1 << 4) 294 295 /** 296 * INIT request/reply flags 297 * 298 * FUSE_ASYNC_READ: asynchronous read requests 299 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 300 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 301 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 302 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 303 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 304 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 305 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 306 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 307 * FUSE_SPLICE_READ: kernel supports splice read on the device 308 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 309 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 310 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 311 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 312 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 313 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 314 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 315 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 316 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 317 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 318 * FUSE_POSIX_ACL: filesystem supports posix acls 319 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 320 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 321 * FUSE_CACHE_SYMLINKS: cache READLINK responses 322 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 323 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 324 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for 325 * foffset and moffset fields in struct 326 * fuse_setupmapping_out and fuse_removemapping_one. 327 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts 328 * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc. 329 * Upon write/truncate suid/sgid is only killed if caller 330 * does not have CAP_FSETID. Additionally upon 331 * write/truncate sgid is killed only if file has group 332 * execute permission. (Same as Linux VFS behavior). 333 */ 334 #define FUSE_ASYNC_READ (1 << 0) 335 #define FUSE_POSIX_LOCKS (1 << 1) 336 #define FUSE_FILE_OPS (1 << 2) 337 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 338 #define FUSE_EXPORT_SUPPORT (1 << 4) 339 #define FUSE_BIG_WRITES (1 << 5) 340 #define FUSE_DONT_MASK (1 << 6) 341 #define FUSE_SPLICE_WRITE (1 << 7) 342 #define FUSE_SPLICE_MOVE (1 << 8) 343 #define FUSE_SPLICE_READ (1 << 9) 344 #define FUSE_FLOCK_LOCKS (1 << 10) 345 #define FUSE_HAS_IOCTL_DIR (1 << 11) 346 #define FUSE_AUTO_INVAL_DATA (1 << 12) 347 #define FUSE_DO_READDIRPLUS (1 << 13) 348 #define FUSE_READDIRPLUS_AUTO (1 << 14) 349 #define FUSE_ASYNC_DIO (1 << 15) 350 #define FUSE_WRITEBACK_CACHE (1 << 16) 351 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 352 #define FUSE_PARALLEL_DIROPS (1 << 18) 353 #define FUSE_HANDLE_KILLPRIV (1 << 19) 354 #define FUSE_POSIX_ACL (1 << 20) 355 #define FUSE_ABORT_ERROR (1 << 21) 356 #define FUSE_MAX_PAGES (1 << 22) 357 #define FUSE_CACHE_SYMLINKS (1 << 23) 358 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 359 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 360 #define FUSE_MAP_ALIGNMENT (1 << 26) 361 #define FUSE_SUBMOUNTS (1 << 27) 362 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) 363 364 /** 365 * CUSE INIT request/reply flags 366 * 367 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 368 */ 369 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 370 371 /** 372 * Release flags 373 */ 374 #define FUSE_RELEASE_FLUSH (1 << 0) 375 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 376 377 /** 378 * Getattr flags 379 */ 380 #define FUSE_GETATTR_FH (1 << 0) 381 382 /** 383 * Lock flags 384 */ 385 #define FUSE_LK_FLOCK (1 << 0) 386 387 /** 388 * WRITE flags 389 * 390 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 391 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 392 * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits 393 */ 394 #define FUSE_WRITE_CACHE (1 << 0) 395 #define FUSE_WRITE_LOCKOWNER (1 << 1) 396 #define FUSE_WRITE_KILL_SUIDGID (1 << 2) 397 398 /* Obsolete alias; this flag implies killing suid/sgid only. */ 399 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID 400 401 /** 402 * Read flags 403 */ 404 #define FUSE_READ_LOCKOWNER (1 << 1) 405 406 /** 407 * Ioctl flags 408 * 409 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 410 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 411 * FUSE_IOCTL_RETRY: retry with new iovecs 412 * FUSE_IOCTL_32BIT: 32bit ioctl 413 * FUSE_IOCTL_DIR: is a directory 414 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 415 * 416 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 417 */ 418 #define FUSE_IOCTL_COMPAT (1 << 0) 419 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 420 #define FUSE_IOCTL_RETRY (1 << 2) 421 #define FUSE_IOCTL_32BIT (1 << 3) 422 #define FUSE_IOCTL_DIR (1 << 4) 423 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 424 425 #define FUSE_IOCTL_MAX_IOV 256 426 427 /** 428 * Poll flags 429 * 430 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 431 */ 432 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 433 434 /** 435 * Fsync flags 436 * 437 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 438 */ 439 #define FUSE_FSYNC_FDATASYNC (1 << 0) 440 441 /** 442 * fuse_attr flags 443 * 444 * FUSE_ATTR_SUBMOUNT: Object is a submount root 445 */ 446 #define FUSE_ATTR_SUBMOUNT (1 << 0) 447 448 /** 449 * Open flags 450 * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable 451 */ 452 #define FUSE_OPEN_KILL_SUIDGID (1 << 0) 453 454 enum fuse_opcode { 455 FUSE_LOOKUP = 1, 456 FUSE_FORGET = 2, /* no reply */ 457 FUSE_GETATTR = 3, 458 FUSE_SETATTR = 4, 459 FUSE_READLINK = 5, 460 FUSE_SYMLINK = 6, 461 FUSE_MKNOD = 8, 462 FUSE_MKDIR = 9, 463 FUSE_UNLINK = 10, 464 FUSE_RMDIR = 11, 465 FUSE_RENAME = 12, 466 FUSE_LINK = 13, 467 FUSE_OPEN = 14, 468 FUSE_READ = 15, 469 FUSE_WRITE = 16, 470 FUSE_STATFS = 17, 471 FUSE_RELEASE = 18, 472 FUSE_FSYNC = 20, 473 FUSE_SETXATTR = 21, 474 FUSE_GETXATTR = 22, 475 FUSE_LISTXATTR = 23, 476 FUSE_REMOVEXATTR = 24, 477 FUSE_FLUSH = 25, 478 FUSE_INIT = 26, 479 FUSE_OPENDIR = 27, 480 FUSE_READDIR = 28, 481 FUSE_RELEASEDIR = 29, 482 FUSE_FSYNCDIR = 30, 483 FUSE_GETLK = 31, 484 FUSE_SETLK = 32, 485 FUSE_SETLKW = 33, 486 FUSE_ACCESS = 34, 487 FUSE_CREATE = 35, 488 FUSE_INTERRUPT = 36, 489 FUSE_BMAP = 37, 490 FUSE_DESTROY = 38, 491 FUSE_IOCTL = 39, 492 FUSE_POLL = 40, 493 FUSE_NOTIFY_REPLY = 41, 494 FUSE_BATCH_FORGET = 42, 495 FUSE_FALLOCATE = 43, 496 FUSE_READDIRPLUS = 44, 497 FUSE_RENAME2 = 45, 498 FUSE_LSEEK = 46, 499 FUSE_COPY_FILE_RANGE = 47, 500 FUSE_SETUPMAPPING = 48, 501 FUSE_REMOVEMAPPING = 49, 502 503 /* CUSE specific operations */ 504 CUSE_INIT = 4096, 505 506 /* Reserved opcodes: helpful to detect structure endian-ness */ 507 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 508 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 509 }; 510 511 enum fuse_notify_code { 512 FUSE_NOTIFY_POLL = 1, 513 FUSE_NOTIFY_INVAL_INODE = 2, 514 FUSE_NOTIFY_INVAL_ENTRY = 3, 515 FUSE_NOTIFY_STORE = 4, 516 FUSE_NOTIFY_RETRIEVE = 5, 517 FUSE_NOTIFY_DELETE = 6, 518 FUSE_NOTIFY_CODE_MAX, 519 }; 520 521 /* The read buffer is required to be at least 8k, but may be much larger */ 522 #define FUSE_MIN_READ_BUFFER 8192 523 524 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 525 526 struct fuse_entry_out { 527 uint64_t nodeid; /* Inode ID */ 528 uint64_t generation; /* Inode generation: nodeid:gen must 529 be unique for the fs's lifetime */ 530 uint64_t entry_valid; /* Cache timeout for the name */ 531 uint64_t attr_valid; /* Cache timeout for the attributes */ 532 uint32_t entry_valid_nsec; 533 uint32_t attr_valid_nsec; 534 struct fuse_attr attr; 535 }; 536 537 struct fuse_forget_in { 538 uint64_t nlookup; 539 }; 540 541 struct fuse_forget_one { 542 uint64_t nodeid; 543 uint64_t nlookup; 544 }; 545 546 struct fuse_batch_forget_in { 547 uint32_t count; 548 uint32_t dummy; 549 }; 550 551 struct fuse_getattr_in { 552 uint32_t getattr_flags; 553 uint32_t dummy; 554 uint64_t fh; 555 }; 556 557 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 558 559 struct fuse_attr_out { 560 uint64_t attr_valid; /* Cache timeout for the attributes */ 561 uint32_t attr_valid_nsec; 562 uint32_t dummy; 563 struct fuse_attr attr; 564 }; 565 566 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 567 568 struct fuse_mknod_in { 569 uint32_t mode; 570 uint32_t rdev; 571 uint32_t umask; 572 uint32_t padding; 573 }; 574 575 struct fuse_mkdir_in { 576 uint32_t mode; 577 uint32_t umask; 578 }; 579 580 struct fuse_rename_in { 581 uint64_t newdir; 582 }; 583 584 struct fuse_rename2_in { 585 uint64_t newdir; 586 uint32_t flags; 587 uint32_t padding; 588 }; 589 590 struct fuse_link_in { 591 uint64_t oldnodeid; 592 }; 593 594 struct fuse_setattr_in { 595 uint32_t valid; 596 uint32_t padding; 597 uint64_t fh; 598 uint64_t size; 599 uint64_t lock_owner; 600 uint64_t atime; 601 uint64_t mtime; 602 uint64_t ctime; 603 uint32_t atimensec; 604 uint32_t mtimensec; 605 uint32_t ctimensec; 606 uint32_t mode; 607 uint32_t unused4; 608 uint32_t uid; 609 uint32_t gid; 610 uint32_t unused5; 611 }; 612 613 struct fuse_open_in { 614 uint32_t flags; 615 uint32_t open_flags; /* FUSE_OPEN_... */ 616 }; 617 618 struct fuse_create_in { 619 uint32_t flags; 620 uint32_t mode; 621 uint32_t umask; 622 uint32_t open_flags; /* FUSE_OPEN_... */ 623 }; 624 625 struct fuse_open_out { 626 uint64_t fh; 627 uint32_t open_flags; 628 uint32_t padding; 629 }; 630 631 struct fuse_release_in { 632 uint64_t fh; 633 uint32_t flags; 634 uint32_t release_flags; 635 uint64_t lock_owner; 636 }; 637 638 struct fuse_flush_in { 639 uint64_t fh; 640 uint32_t unused; 641 uint32_t padding; 642 uint64_t lock_owner; 643 }; 644 645 struct fuse_read_in { 646 uint64_t fh; 647 uint64_t offset; 648 uint32_t size; 649 uint32_t read_flags; 650 uint64_t lock_owner; 651 uint32_t flags; 652 uint32_t padding; 653 }; 654 655 #define FUSE_COMPAT_WRITE_IN_SIZE 24 656 657 struct fuse_write_in { 658 uint64_t fh; 659 uint64_t offset; 660 uint32_t size; 661 uint32_t write_flags; 662 uint64_t lock_owner; 663 uint32_t flags; 664 uint32_t padding; 665 }; 666 667 struct fuse_write_out { 668 uint32_t size; 669 uint32_t padding; 670 }; 671 672 #define FUSE_COMPAT_STATFS_SIZE 48 673 674 struct fuse_statfs_out { 675 struct fuse_kstatfs st; 676 }; 677 678 struct fuse_fsync_in { 679 uint64_t fh; 680 uint32_t fsync_flags; 681 uint32_t padding; 682 }; 683 684 struct fuse_setxattr_in { 685 uint32_t size; 686 uint32_t flags; 687 }; 688 689 struct fuse_getxattr_in { 690 uint32_t size; 691 uint32_t padding; 692 }; 693 694 struct fuse_getxattr_out { 695 uint32_t size; 696 uint32_t padding; 697 }; 698 699 struct fuse_lk_in { 700 uint64_t fh; 701 uint64_t owner; 702 struct fuse_file_lock lk; 703 uint32_t lk_flags; 704 uint32_t padding; 705 }; 706 707 struct fuse_lk_out { 708 struct fuse_file_lock lk; 709 }; 710 711 struct fuse_access_in { 712 uint32_t mask; 713 uint32_t padding; 714 }; 715 716 struct fuse_init_in { 717 uint32_t major; 718 uint32_t minor; 719 uint32_t max_readahead; 720 uint32_t flags; 721 }; 722 723 #define FUSE_COMPAT_INIT_OUT_SIZE 8 724 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 725 726 struct fuse_init_out { 727 uint32_t major; 728 uint32_t minor; 729 uint32_t max_readahead; 730 uint32_t flags; 731 uint16_t max_background; 732 uint16_t congestion_threshold; 733 uint32_t max_write; 734 uint32_t time_gran; 735 uint16_t max_pages; 736 uint16_t map_alignment; 737 uint32_t unused[8]; 738 }; 739 740 #define CUSE_INIT_INFO_MAX 4096 741 742 struct cuse_init_in { 743 uint32_t major; 744 uint32_t minor; 745 uint32_t unused; 746 uint32_t flags; 747 }; 748 749 struct cuse_init_out { 750 uint32_t major; 751 uint32_t minor; 752 uint32_t unused; 753 uint32_t flags; 754 uint32_t max_read; 755 uint32_t max_write; 756 uint32_t dev_major; /* chardev major */ 757 uint32_t dev_minor; /* chardev minor */ 758 uint32_t spare[10]; 759 }; 760 761 struct fuse_interrupt_in { 762 uint64_t unique; 763 }; 764 765 struct fuse_bmap_in { 766 uint64_t block; 767 uint32_t blocksize; 768 uint32_t padding; 769 }; 770 771 struct fuse_bmap_out { 772 uint64_t block; 773 }; 774 775 struct fuse_ioctl_in { 776 uint64_t fh; 777 uint32_t flags; 778 uint32_t cmd; 779 uint64_t arg; 780 uint32_t in_size; 781 uint32_t out_size; 782 }; 783 784 struct fuse_ioctl_iovec { 785 uint64_t base; 786 uint64_t len; 787 }; 788 789 struct fuse_ioctl_out { 790 int32_t result; 791 uint32_t flags; 792 uint32_t in_iovs; 793 uint32_t out_iovs; 794 }; 795 796 struct fuse_poll_in { 797 uint64_t fh; 798 uint64_t kh; 799 uint32_t flags; 800 uint32_t events; 801 }; 802 803 struct fuse_poll_out { 804 uint32_t revents; 805 uint32_t padding; 806 }; 807 808 struct fuse_notify_poll_wakeup_out { 809 uint64_t kh; 810 }; 811 812 struct fuse_fallocate_in { 813 uint64_t fh; 814 uint64_t offset; 815 uint64_t length; 816 uint32_t mode; 817 uint32_t padding; 818 }; 819 820 struct fuse_in_header { 821 uint32_t len; 822 uint32_t opcode; 823 uint64_t unique; 824 uint64_t nodeid; 825 uint32_t uid; 826 uint32_t gid; 827 uint32_t pid; 828 uint32_t padding; 829 }; 830 831 struct fuse_out_header { 832 uint32_t len; 833 int32_t error; 834 uint64_t unique; 835 }; 836 837 struct fuse_dirent { 838 uint64_t ino; 839 uint64_t off; 840 uint32_t namelen; 841 uint32_t type; 842 char name[]; 843 }; 844 845 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 846 #define FUSE_DIRENT_ALIGN(x) \ 847 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 848 #define FUSE_DIRENT_SIZE(d) \ 849 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 850 851 struct fuse_direntplus { 852 struct fuse_entry_out entry_out; 853 struct fuse_dirent dirent; 854 }; 855 856 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 857 offsetof(struct fuse_direntplus, dirent.name) 858 #define FUSE_DIRENTPLUS_SIZE(d) \ 859 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 860 861 struct fuse_notify_inval_inode_out { 862 uint64_t ino; 863 int64_t off; 864 int64_t len; 865 }; 866 867 struct fuse_notify_inval_entry_out { 868 uint64_t parent; 869 uint32_t namelen; 870 uint32_t padding; 871 }; 872 873 struct fuse_notify_delete_out { 874 uint64_t parent; 875 uint64_t child; 876 uint32_t namelen; 877 uint32_t padding; 878 }; 879 880 struct fuse_notify_store_out { 881 uint64_t nodeid; 882 uint64_t offset; 883 uint32_t size; 884 uint32_t padding; 885 }; 886 887 struct fuse_notify_retrieve_out { 888 uint64_t notify_unique; 889 uint64_t nodeid; 890 uint64_t offset; 891 uint32_t size; 892 uint32_t padding; 893 }; 894 895 /* Matches the size of fuse_write_in */ 896 struct fuse_notify_retrieve_in { 897 uint64_t dummy1; 898 uint64_t offset; 899 uint32_t size; 900 uint32_t dummy2; 901 uint64_t dummy3; 902 uint64_t dummy4; 903 }; 904 905 /* Device ioctls: */ 906 #define FUSE_DEV_IOC_MAGIC 229 907 #define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t) 908 909 struct fuse_lseek_in { 910 uint64_t fh; 911 uint64_t offset; 912 uint32_t whence; 913 uint32_t padding; 914 }; 915 916 struct fuse_lseek_out { 917 uint64_t offset; 918 }; 919 920 struct fuse_copy_file_range_in { 921 uint64_t fh_in; 922 uint64_t off_in; 923 uint64_t nodeid_out; 924 uint64_t fh_out; 925 uint64_t off_out; 926 uint64_t len; 927 uint64_t flags; 928 }; 929 930 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) 931 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1) 932 struct fuse_setupmapping_in { 933 /* An already open handle */ 934 uint64_t fh; 935 /* Offset into the file to start the mapping */ 936 uint64_t foffset; 937 /* Length of mapping required */ 938 uint64_t len; 939 /* Flags, FUSE_SETUPMAPPING_FLAG_* */ 940 uint64_t flags; 941 /* Offset in Memory Window */ 942 uint64_t moffset; 943 }; 944 945 struct fuse_removemapping_in { 946 /* number of fuse_removemapping_one follows */ 947 uint32_t count; 948 }; 949 950 struct fuse_removemapping_one { 951 /* Offset into the dax window start the unmapping */ 952 uint64_t moffset; 953 /* Length of mapping required */ 954 uint64_t len; 955 }; 956 957 #define FUSE_REMOVEMAPPING_MAX_ENTRY \ 958 (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) 959 960 #endif /* _LINUX_FUSE_H */ 961