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 * - extend fuse_setxattr_in, add FUSE_SETXATTR_EXT 183 * - add FUSE_SETXATTR_ACL_KILL_SGID 184 * 185 * 7.34 186 * - add FUSE_SYNCFS 187 * 188 * 7.35 189 * - add FOPEN_NOFLUSH 190 * 191 * 7.36 192 * - extend fuse_init_in with reserved fields, add FUSE_INIT_EXT init flag 193 * - add flags2 to fuse_init_in and fuse_init_out 194 */ 195 196 #ifndef _LINUX_FUSE_H 197 #define _LINUX_FUSE_H 198 199 #ifdef __KERNEL__ 200 #include <linux/types.h> 201 #else 202 #include <stdint.h> 203 #endif 204 205 /* 206 * Version negotiation: 207 * 208 * Both the kernel and userspace send the version they support in the 209 * INIT request and reply respectively. 210 * 211 * If the major versions match then both shall use the smallest 212 * of the two minor versions for communication. 213 * 214 * If the kernel supports a larger major version, then userspace shall 215 * reply with the major version it supports, ignore the rest of the 216 * INIT message and expect a new INIT message from the kernel with a 217 * matching major version. 218 * 219 * If the library supports a larger major version, then it shall fall 220 * back to the major protocol version sent by the kernel for 221 * communication and reply with that major version (and an arbitrary 222 * supported minor version). 223 */ 224 225 /** Version number of this interface */ 226 #define FUSE_KERNEL_VERSION 7 227 228 /** Minor version number of this interface */ 229 #define FUSE_KERNEL_MINOR_VERSION 36 230 231 /** The node ID of the root inode */ 232 #define FUSE_ROOT_ID 1 233 234 /* Make sure all structures are padded to 64bit boundary, so 32bit 235 userspace works under 64bit kernels */ 236 237 struct fuse_attr { 238 uint64_t ino; 239 uint64_t size; 240 uint64_t blocks; 241 uint64_t atime; 242 uint64_t mtime; 243 uint64_t ctime; 244 uint32_t atimensec; 245 uint32_t mtimensec; 246 uint32_t ctimensec; 247 uint32_t mode; 248 uint32_t nlink; 249 uint32_t uid; 250 uint32_t gid; 251 uint32_t rdev; 252 uint32_t blksize; 253 uint32_t flags; 254 }; 255 256 struct fuse_kstatfs { 257 uint64_t blocks; 258 uint64_t bfree; 259 uint64_t bavail; 260 uint64_t files; 261 uint64_t ffree; 262 uint32_t bsize; 263 uint32_t namelen; 264 uint32_t frsize; 265 uint32_t padding; 266 uint32_t spare[6]; 267 }; 268 269 struct fuse_file_lock { 270 uint64_t start; 271 uint64_t end; 272 uint32_t type; 273 uint32_t pid; /* tgid */ 274 }; 275 276 /** 277 * Bitmasks for fuse_setattr_in.valid 278 */ 279 #define FATTR_MODE (1 << 0) 280 #define FATTR_UID (1 << 1) 281 #define FATTR_GID (1 << 2) 282 #define FATTR_SIZE (1 << 3) 283 #define FATTR_ATIME (1 << 4) 284 #define FATTR_MTIME (1 << 5) 285 #define FATTR_FH (1 << 6) 286 #define FATTR_ATIME_NOW (1 << 7) 287 #define FATTR_MTIME_NOW (1 << 8) 288 #define FATTR_LOCKOWNER (1 << 9) 289 #define FATTR_CTIME (1 << 10) 290 #define FATTR_KILL_SUIDGID (1 << 11) 291 292 /** 293 * Flags returned by the OPEN request 294 * 295 * FOPEN_DIRECT_IO: bypass page cache for this open file 296 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 297 * FOPEN_NONSEEKABLE: the file is not seekable 298 * FOPEN_CACHE_DIR: allow caching this directory 299 * FOPEN_STREAM: the file is stream-like (no file position at all) 300 * FOPEN_NOFLUSH: don't flush data cache on close (unless FUSE_WRITEBACK_CACHE) 301 */ 302 #define FOPEN_DIRECT_IO (1 << 0) 303 #define FOPEN_KEEP_CACHE (1 << 1) 304 #define FOPEN_NONSEEKABLE (1 << 2) 305 #define FOPEN_CACHE_DIR (1 << 3) 306 #define FOPEN_STREAM (1 << 4) 307 #define FOPEN_NOFLUSH (1 << 5) 308 309 /** 310 * INIT request/reply flags 311 * 312 * FUSE_ASYNC_READ: asynchronous read requests 313 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 314 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 315 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 316 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 317 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 318 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 319 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 320 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 321 * FUSE_SPLICE_READ: kernel supports splice read on the device 322 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 323 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 324 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 325 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 326 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 327 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 328 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 329 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 330 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 331 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 332 * FUSE_POSIX_ACL: filesystem supports posix acls 333 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 334 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 335 * FUSE_CACHE_SYMLINKS: cache READLINK responses 336 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 337 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 338 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for 339 * foffset and moffset fields in struct 340 * fuse_setupmapping_out and fuse_removemapping_one. 341 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts 342 * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc. 343 * Upon write/truncate suid/sgid is only killed if caller 344 * does not have CAP_FSETID. Additionally upon 345 * write/truncate sgid is killed only if file has group 346 * execute permission. (Same as Linux VFS behavior). 347 * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in 348 * FUSE_INIT_EXT: extended fuse_init_in request 349 * FUSE_INIT_RESERVED: reserved, do not use 350 */ 351 #define FUSE_ASYNC_READ (1 << 0) 352 #define FUSE_POSIX_LOCKS (1 << 1) 353 #define FUSE_FILE_OPS (1 << 2) 354 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 355 #define FUSE_EXPORT_SUPPORT (1 << 4) 356 #define FUSE_BIG_WRITES (1 << 5) 357 #define FUSE_DONT_MASK (1 << 6) 358 #define FUSE_SPLICE_WRITE (1 << 7) 359 #define FUSE_SPLICE_MOVE (1 << 8) 360 #define FUSE_SPLICE_READ (1 << 9) 361 #define FUSE_FLOCK_LOCKS (1 << 10) 362 #define FUSE_HAS_IOCTL_DIR (1 << 11) 363 #define FUSE_AUTO_INVAL_DATA (1 << 12) 364 #define FUSE_DO_READDIRPLUS (1 << 13) 365 #define FUSE_READDIRPLUS_AUTO (1 << 14) 366 #define FUSE_ASYNC_DIO (1 << 15) 367 #define FUSE_WRITEBACK_CACHE (1 << 16) 368 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 369 #define FUSE_PARALLEL_DIROPS (1 << 18) 370 #define FUSE_HANDLE_KILLPRIV (1 << 19) 371 #define FUSE_POSIX_ACL (1 << 20) 372 #define FUSE_ABORT_ERROR (1 << 21) 373 #define FUSE_MAX_PAGES (1 << 22) 374 #define FUSE_CACHE_SYMLINKS (1 << 23) 375 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 376 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 377 #define FUSE_MAP_ALIGNMENT (1 << 26) 378 #define FUSE_SUBMOUNTS (1 << 27) 379 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) 380 #define FUSE_SETXATTR_EXT (1 << 29) 381 #define FUSE_INIT_EXT (1 << 30) 382 #define FUSE_INIT_RESERVED (1 << 31) 383 /* bits 32..63 get shifted down 32 bits into the flags2 field */ 384 385 /** 386 * CUSE INIT request/reply flags 387 * 388 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 389 */ 390 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 391 392 /** 393 * Release flags 394 */ 395 #define FUSE_RELEASE_FLUSH (1 << 0) 396 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 397 398 /** 399 * Getattr flags 400 */ 401 #define FUSE_GETATTR_FH (1 << 0) 402 403 /** 404 * Lock flags 405 */ 406 #define FUSE_LK_FLOCK (1 << 0) 407 408 /** 409 * WRITE flags 410 * 411 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 412 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 413 * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits 414 */ 415 #define FUSE_WRITE_CACHE (1 << 0) 416 #define FUSE_WRITE_LOCKOWNER (1 << 1) 417 #define FUSE_WRITE_KILL_SUIDGID (1 << 2) 418 419 /* Obsolete alias; this flag implies killing suid/sgid only. */ 420 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID 421 422 /** 423 * Read flags 424 */ 425 #define FUSE_READ_LOCKOWNER (1 << 1) 426 427 /** 428 * Ioctl flags 429 * 430 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 431 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 432 * FUSE_IOCTL_RETRY: retry with new iovecs 433 * FUSE_IOCTL_32BIT: 32bit ioctl 434 * FUSE_IOCTL_DIR: is a directory 435 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 436 * 437 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 438 */ 439 #define FUSE_IOCTL_COMPAT (1 << 0) 440 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 441 #define FUSE_IOCTL_RETRY (1 << 2) 442 #define FUSE_IOCTL_32BIT (1 << 3) 443 #define FUSE_IOCTL_DIR (1 << 4) 444 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 445 446 #define FUSE_IOCTL_MAX_IOV 256 447 448 /** 449 * Poll flags 450 * 451 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 452 */ 453 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 454 455 /** 456 * Fsync flags 457 * 458 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 459 */ 460 #define FUSE_FSYNC_FDATASYNC (1 << 0) 461 462 /** 463 * fuse_attr flags 464 * 465 * FUSE_ATTR_SUBMOUNT: Object is a submount root 466 */ 467 #define FUSE_ATTR_SUBMOUNT (1 << 0) 468 469 /** 470 * Open flags 471 * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable 472 */ 473 #define FUSE_OPEN_KILL_SUIDGID (1 << 0) 474 475 /** 476 * setxattr flags 477 * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set 478 */ 479 #define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0) 480 481 enum fuse_opcode { 482 FUSE_LOOKUP = 1, 483 FUSE_FORGET = 2, /* no reply */ 484 FUSE_GETATTR = 3, 485 FUSE_SETATTR = 4, 486 FUSE_READLINK = 5, 487 FUSE_SYMLINK = 6, 488 FUSE_MKNOD = 8, 489 FUSE_MKDIR = 9, 490 FUSE_UNLINK = 10, 491 FUSE_RMDIR = 11, 492 FUSE_RENAME = 12, 493 FUSE_LINK = 13, 494 FUSE_OPEN = 14, 495 FUSE_READ = 15, 496 FUSE_WRITE = 16, 497 FUSE_STATFS = 17, 498 FUSE_RELEASE = 18, 499 FUSE_FSYNC = 20, 500 FUSE_SETXATTR = 21, 501 FUSE_GETXATTR = 22, 502 FUSE_LISTXATTR = 23, 503 FUSE_REMOVEXATTR = 24, 504 FUSE_FLUSH = 25, 505 FUSE_INIT = 26, 506 FUSE_OPENDIR = 27, 507 FUSE_READDIR = 28, 508 FUSE_RELEASEDIR = 29, 509 FUSE_FSYNCDIR = 30, 510 FUSE_GETLK = 31, 511 FUSE_SETLK = 32, 512 FUSE_SETLKW = 33, 513 FUSE_ACCESS = 34, 514 FUSE_CREATE = 35, 515 FUSE_INTERRUPT = 36, 516 FUSE_BMAP = 37, 517 FUSE_DESTROY = 38, 518 FUSE_IOCTL = 39, 519 FUSE_POLL = 40, 520 FUSE_NOTIFY_REPLY = 41, 521 FUSE_BATCH_FORGET = 42, 522 FUSE_FALLOCATE = 43, 523 FUSE_READDIRPLUS = 44, 524 FUSE_RENAME2 = 45, 525 FUSE_LSEEK = 46, 526 FUSE_COPY_FILE_RANGE = 47, 527 FUSE_SETUPMAPPING = 48, 528 FUSE_REMOVEMAPPING = 49, 529 FUSE_SYNCFS = 50, 530 531 /* CUSE specific operations */ 532 CUSE_INIT = 4096, 533 534 /* Reserved opcodes: helpful to detect structure endian-ness */ 535 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 536 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 537 }; 538 539 enum fuse_notify_code { 540 FUSE_NOTIFY_POLL = 1, 541 FUSE_NOTIFY_INVAL_INODE = 2, 542 FUSE_NOTIFY_INVAL_ENTRY = 3, 543 FUSE_NOTIFY_STORE = 4, 544 FUSE_NOTIFY_RETRIEVE = 5, 545 FUSE_NOTIFY_DELETE = 6, 546 FUSE_NOTIFY_CODE_MAX, 547 }; 548 549 /* The read buffer is required to be at least 8k, but may be much larger */ 550 #define FUSE_MIN_READ_BUFFER 8192 551 552 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 553 554 struct fuse_entry_out { 555 uint64_t nodeid; /* Inode ID */ 556 uint64_t generation; /* Inode generation: nodeid:gen must 557 be unique for the fs's lifetime */ 558 uint64_t entry_valid; /* Cache timeout for the name */ 559 uint64_t attr_valid; /* Cache timeout for the attributes */ 560 uint32_t entry_valid_nsec; 561 uint32_t attr_valid_nsec; 562 struct fuse_attr attr; 563 }; 564 565 struct fuse_forget_in { 566 uint64_t nlookup; 567 }; 568 569 struct fuse_forget_one { 570 uint64_t nodeid; 571 uint64_t nlookup; 572 }; 573 574 struct fuse_batch_forget_in { 575 uint32_t count; 576 uint32_t dummy; 577 }; 578 579 struct fuse_getattr_in { 580 uint32_t getattr_flags; 581 uint32_t dummy; 582 uint64_t fh; 583 }; 584 585 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 586 587 struct fuse_attr_out { 588 uint64_t attr_valid; /* Cache timeout for the attributes */ 589 uint32_t attr_valid_nsec; 590 uint32_t dummy; 591 struct fuse_attr attr; 592 }; 593 594 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 595 596 struct fuse_mknod_in { 597 uint32_t mode; 598 uint32_t rdev; 599 uint32_t umask; 600 uint32_t padding; 601 }; 602 603 struct fuse_mkdir_in { 604 uint32_t mode; 605 uint32_t umask; 606 }; 607 608 struct fuse_rename_in { 609 uint64_t newdir; 610 }; 611 612 struct fuse_rename2_in { 613 uint64_t newdir; 614 uint32_t flags; 615 uint32_t padding; 616 }; 617 618 struct fuse_link_in { 619 uint64_t oldnodeid; 620 }; 621 622 struct fuse_setattr_in { 623 uint32_t valid; 624 uint32_t padding; 625 uint64_t fh; 626 uint64_t size; 627 uint64_t lock_owner; 628 uint64_t atime; 629 uint64_t mtime; 630 uint64_t ctime; 631 uint32_t atimensec; 632 uint32_t mtimensec; 633 uint32_t ctimensec; 634 uint32_t mode; 635 uint32_t unused4; 636 uint32_t uid; 637 uint32_t gid; 638 uint32_t unused5; 639 }; 640 641 struct fuse_open_in { 642 uint32_t flags; 643 uint32_t open_flags; /* FUSE_OPEN_... */ 644 }; 645 646 struct fuse_create_in { 647 uint32_t flags; 648 uint32_t mode; 649 uint32_t umask; 650 uint32_t open_flags; /* FUSE_OPEN_... */ 651 }; 652 653 struct fuse_open_out { 654 uint64_t fh; 655 uint32_t open_flags; 656 uint32_t padding; 657 }; 658 659 struct fuse_release_in { 660 uint64_t fh; 661 uint32_t flags; 662 uint32_t release_flags; 663 uint64_t lock_owner; 664 }; 665 666 struct fuse_flush_in { 667 uint64_t fh; 668 uint32_t unused; 669 uint32_t padding; 670 uint64_t lock_owner; 671 }; 672 673 struct fuse_read_in { 674 uint64_t fh; 675 uint64_t offset; 676 uint32_t size; 677 uint32_t read_flags; 678 uint64_t lock_owner; 679 uint32_t flags; 680 uint32_t padding; 681 }; 682 683 #define FUSE_COMPAT_WRITE_IN_SIZE 24 684 685 struct fuse_write_in { 686 uint64_t fh; 687 uint64_t offset; 688 uint32_t size; 689 uint32_t write_flags; 690 uint64_t lock_owner; 691 uint32_t flags; 692 uint32_t padding; 693 }; 694 695 struct fuse_write_out { 696 uint32_t size; 697 uint32_t padding; 698 }; 699 700 #define FUSE_COMPAT_STATFS_SIZE 48 701 702 struct fuse_statfs_out { 703 struct fuse_kstatfs st; 704 }; 705 706 struct fuse_fsync_in { 707 uint64_t fh; 708 uint32_t fsync_flags; 709 uint32_t padding; 710 }; 711 712 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8 713 714 struct fuse_setxattr_in { 715 uint32_t size; 716 uint32_t flags; 717 uint32_t setxattr_flags; 718 uint32_t padding; 719 }; 720 721 struct fuse_getxattr_in { 722 uint32_t size; 723 uint32_t padding; 724 }; 725 726 struct fuse_getxattr_out { 727 uint32_t size; 728 uint32_t padding; 729 }; 730 731 struct fuse_lk_in { 732 uint64_t fh; 733 uint64_t owner; 734 struct fuse_file_lock lk; 735 uint32_t lk_flags; 736 uint32_t padding; 737 }; 738 739 struct fuse_lk_out { 740 struct fuse_file_lock lk; 741 }; 742 743 struct fuse_access_in { 744 uint32_t mask; 745 uint32_t padding; 746 }; 747 748 struct fuse_init_in { 749 uint32_t major; 750 uint32_t minor; 751 uint32_t max_readahead; 752 uint32_t flags; 753 uint32_t flags2; 754 uint32_t unused[11]; 755 }; 756 757 #define FUSE_COMPAT_INIT_OUT_SIZE 8 758 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 759 760 struct fuse_init_out { 761 uint32_t major; 762 uint32_t minor; 763 uint32_t max_readahead; 764 uint32_t flags; 765 uint16_t max_background; 766 uint16_t congestion_threshold; 767 uint32_t max_write; 768 uint32_t time_gran; 769 uint16_t max_pages; 770 uint16_t map_alignment; 771 uint32_t flags2; 772 uint32_t unused[7]; 773 }; 774 775 #define CUSE_INIT_INFO_MAX 4096 776 777 struct cuse_init_in { 778 uint32_t major; 779 uint32_t minor; 780 uint32_t unused; 781 uint32_t flags; 782 }; 783 784 struct cuse_init_out { 785 uint32_t major; 786 uint32_t minor; 787 uint32_t unused; 788 uint32_t flags; 789 uint32_t max_read; 790 uint32_t max_write; 791 uint32_t dev_major; /* chardev major */ 792 uint32_t dev_minor; /* chardev minor */ 793 uint32_t spare[10]; 794 }; 795 796 struct fuse_interrupt_in { 797 uint64_t unique; 798 }; 799 800 struct fuse_bmap_in { 801 uint64_t block; 802 uint32_t blocksize; 803 uint32_t padding; 804 }; 805 806 struct fuse_bmap_out { 807 uint64_t block; 808 }; 809 810 struct fuse_ioctl_in { 811 uint64_t fh; 812 uint32_t flags; 813 uint32_t cmd; 814 uint64_t arg; 815 uint32_t in_size; 816 uint32_t out_size; 817 }; 818 819 struct fuse_ioctl_iovec { 820 uint64_t base; 821 uint64_t len; 822 }; 823 824 struct fuse_ioctl_out { 825 int32_t result; 826 uint32_t flags; 827 uint32_t in_iovs; 828 uint32_t out_iovs; 829 }; 830 831 struct fuse_poll_in { 832 uint64_t fh; 833 uint64_t kh; 834 uint32_t flags; 835 uint32_t events; 836 }; 837 838 struct fuse_poll_out { 839 uint32_t revents; 840 uint32_t padding; 841 }; 842 843 struct fuse_notify_poll_wakeup_out { 844 uint64_t kh; 845 }; 846 847 struct fuse_fallocate_in { 848 uint64_t fh; 849 uint64_t offset; 850 uint64_t length; 851 uint32_t mode; 852 uint32_t padding; 853 }; 854 855 struct fuse_in_header { 856 uint32_t len; 857 uint32_t opcode; 858 uint64_t unique; 859 uint64_t nodeid; 860 uint32_t uid; 861 uint32_t gid; 862 uint32_t pid; 863 uint32_t padding; 864 }; 865 866 struct fuse_out_header { 867 uint32_t len; 868 int32_t error; 869 uint64_t unique; 870 }; 871 872 struct fuse_dirent { 873 uint64_t ino; 874 uint64_t off; 875 uint32_t namelen; 876 uint32_t type; 877 char name[]; 878 }; 879 880 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 881 #define FUSE_DIRENT_ALIGN(x) \ 882 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 883 #define FUSE_DIRENT_SIZE(d) \ 884 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 885 886 struct fuse_direntplus { 887 struct fuse_entry_out entry_out; 888 struct fuse_dirent dirent; 889 }; 890 891 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 892 offsetof(struct fuse_direntplus, dirent.name) 893 #define FUSE_DIRENTPLUS_SIZE(d) \ 894 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 895 896 struct fuse_notify_inval_inode_out { 897 uint64_t ino; 898 int64_t off; 899 int64_t len; 900 }; 901 902 struct fuse_notify_inval_entry_out { 903 uint64_t parent; 904 uint32_t namelen; 905 uint32_t padding; 906 }; 907 908 struct fuse_notify_delete_out { 909 uint64_t parent; 910 uint64_t child; 911 uint32_t namelen; 912 uint32_t padding; 913 }; 914 915 struct fuse_notify_store_out { 916 uint64_t nodeid; 917 uint64_t offset; 918 uint32_t size; 919 uint32_t padding; 920 }; 921 922 struct fuse_notify_retrieve_out { 923 uint64_t notify_unique; 924 uint64_t nodeid; 925 uint64_t offset; 926 uint32_t size; 927 uint32_t padding; 928 }; 929 930 /* Matches the size of fuse_write_in */ 931 struct fuse_notify_retrieve_in { 932 uint64_t dummy1; 933 uint64_t offset; 934 uint32_t size; 935 uint32_t dummy2; 936 uint64_t dummy3; 937 uint64_t dummy4; 938 }; 939 940 /* Device ioctls: */ 941 #define FUSE_DEV_IOC_MAGIC 229 942 #define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t) 943 944 struct fuse_lseek_in { 945 uint64_t fh; 946 uint64_t offset; 947 uint32_t whence; 948 uint32_t padding; 949 }; 950 951 struct fuse_lseek_out { 952 uint64_t offset; 953 }; 954 955 struct fuse_copy_file_range_in { 956 uint64_t fh_in; 957 uint64_t off_in; 958 uint64_t nodeid_out; 959 uint64_t fh_out; 960 uint64_t off_out; 961 uint64_t len; 962 uint64_t flags; 963 }; 964 965 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) 966 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1) 967 struct fuse_setupmapping_in { 968 /* An already open handle */ 969 uint64_t fh; 970 /* Offset into the file to start the mapping */ 971 uint64_t foffset; 972 /* Length of mapping required */ 973 uint64_t len; 974 /* Flags, FUSE_SETUPMAPPING_FLAG_* */ 975 uint64_t flags; 976 /* Offset in Memory Window */ 977 uint64_t moffset; 978 }; 979 980 struct fuse_removemapping_in { 981 /* number of fuse_removemapping_one follows */ 982 uint32_t count; 983 }; 984 985 struct fuse_removemapping_one { 986 /* Offset into the dax window start the unmapping */ 987 uint64_t moffset; 988 /* Length of mapping required */ 989 uint64_t len; 990 }; 991 992 #define FUSE_REMOVEMAPPING_MAX_ENTRY \ 993 (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) 994 995 struct fuse_syncfs_in { 996 uint64_t padding; 997 }; 998 999 #endif /* _LINUX_FUSE_H */ 1000