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 * - 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 * - add FUSE_SECURITY_CTX init flag 195 * - add security context to create, mkdir, symlink, and mknod requests 196 * - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX 197 * 198 * 7.37 199 * - add FUSE_TMPFILE 200 * 201 * 7.38 202 * - add FUSE_EXPIRE_ONLY flag to fuse_notify_inval_entry 203 * - add FOPEN_PARALLEL_DIRECT_WRITES 204 * - add total_extlen to fuse_in_header 205 * - add FUSE_MAX_NR_SECCTX 206 * - add extension header 207 * - add FUSE_EXT_GROUPS 208 * - add FUSE_CREATE_SUPP_GROUP 209 */ 210 211 #ifndef _LINUX_FUSE_H 212 #define _LINUX_FUSE_H 213 214 #include <stdint.h> 215 216 /* 217 * Version negotiation: 218 * 219 * Both the kernel and userspace send the version they support in the 220 * INIT request and reply respectively. 221 * 222 * If the major versions match then both shall use the smallest 223 * of the two minor versions for communication. 224 * 225 * If the kernel supports a larger major version, then userspace shall 226 * reply with the major version it supports, ignore the rest of the 227 * INIT message and expect a new INIT message from the kernel with a 228 * matching major version. 229 * 230 * If the library supports a larger major version, then it shall fall 231 * back to the major protocol version sent by the kernel for 232 * communication and reply with that major version (and an arbitrary 233 * supported minor version). 234 */ 235 236 /** Version number of this interface */ 237 #define FUSE_KERNEL_VERSION 7 238 239 /** Minor version number of this interface */ 240 #define FUSE_KERNEL_MINOR_VERSION 38 241 242 /** The node ID of the root inode */ 243 #define FUSE_ROOT_ID 1 244 245 /* Make sure all structures are padded to 64bit boundary, so 32bit 246 userspace works under 64bit kernels */ 247 248 struct fuse_attr { 249 uint64_t ino; 250 uint64_t size; 251 uint64_t blocks; 252 uint64_t atime; 253 uint64_t mtime; 254 uint64_t ctime; 255 uint32_t atimensec; 256 uint32_t mtimensec; 257 uint32_t ctimensec; 258 uint32_t mode; 259 uint32_t nlink; 260 uint32_t uid; 261 uint32_t gid; 262 uint32_t rdev; 263 uint32_t blksize; 264 uint32_t flags; 265 }; 266 267 struct fuse_kstatfs { 268 uint64_t blocks; 269 uint64_t bfree; 270 uint64_t bavail; 271 uint64_t files; 272 uint64_t ffree; 273 uint32_t bsize; 274 uint32_t namelen; 275 uint32_t frsize; 276 uint32_t padding; 277 uint32_t spare[6]; 278 }; 279 280 struct fuse_file_lock { 281 uint64_t start; 282 uint64_t end; 283 uint32_t type; 284 uint32_t pid; /* tgid */ 285 }; 286 287 /** 288 * Bitmasks for fuse_setattr_in.valid 289 */ 290 #define FATTR_MODE (1 << 0) 291 #define FATTR_UID (1 << 1) 292 #define FATTR_GID (1 << 2) 293 #define FATTR_SIZE (1 << 3) 294 #define FATTR_ATIME (1 << 4) 295 #define FATTR_MTIME (1 << 5) 296 #define FATTR_FH (1 << 6) 297 #define FATTR_ATIME_NOW (1 << 7) 298 #define FATTR_MTIME_NOW (1 << 8) 299 #define FATTR_LOCKOWNER (1 << 9) 300 #define FATTR_CTIME (1 << 10) 301 #define FATTR_KILL_SUIDGID (1 << 11) 302 303 /** 304 * Flags returned by the OPEN request 305 * 306 * FOPEN_DIRECT_IO: bypass page cache for this open file 307 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open 308 * FOPEN_NONSEEKABLE: the file is not seekable 309 * FOPEN_CACHE_DIR: allow caching this directory 310 * FOPEN_STREAM: the file is stream-like (no file position at all) 311 * FOPEN_NOFLUSH: don't flush data cache on close (unless FUSE_WRITEBACK_CACHE) 312 * FOPEN_PARALLEL_DIRECT_WRITES: Allow concurrent direct writes on the same inode 313 */ 314 #define FOPEN_DIRECT_IO (1 << 0) 315 #define FOPEN_KEEP_CACHE (1 << 1) 316 #define FOPEN_NONSEEKABLE (1 << 2) 317 #define FOPEN_CACHE_DIR (1 << 3) 318 #define FOPEN_STREAM (1 << 4) 319 #define FOPEN_NOFLUSH (1 << 5) 320 #define FOPEN_PARALLEL_DIRECT_WRITES (1 << 6) 321 322 /** 323 * INIT request/reply flags 324 * 325 * FUSE_ASYNC_READ: asynchronous read requests 326 * FUSE_POSIX_LOCKS: remote locking for POSIX file locks 327 * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported) 328 * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem 329 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".." 330 * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB 331 * FUSE_DONT_MASK: don't apply umask to file mode on create operations 332 * FUSE_SPLICE_WRITE: kernel supports splice write on the device 333 * FUSE_SPLICE_MOVE: kernel supports splice move on the device 334 * FUSE_SPLICE_READ: kernel supports splice read on the device 335 * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks 336 * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories 337 * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages 338 * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one) 339 * FUSE_READDIRPLUS_AUTO: adaptive readdirplus 340 * FUSE_ASYNC_DIO: asynchronous direct I/O submission 341 * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes 342 * FUSE_NO_OPEN_SUPPORT: kernel supports zero-message opens 343 * FUSE_PARALLEL_DIROPS: allow parallel lookups and readdir 344 * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc 345 * FUSE_POSIX_ACL: filesystem supports posix acls 346 * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED 347 * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages 348 * FUSE_CACHE_SYMLINKS: cache READLINK responses 349 * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir 350 * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request 351 * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for 352 * foffset and moffset fields in struct 353 * fuse_setupmapping_out and fuse_removemapping_one. 354 * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts 355 * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc. 356 * Upon write/truncate suid/sgid is only killed if caller 357 * does not have CAP_FSETID. Additionally upon 358 * write/truncate sgid is killed only if file has group 359 * execute permission. (Same as Linux VFS behavior). 360 * FUSE_SETXATTR_EXT: Server supports extended struct fuse_setxattr_in 361 * FUSE_INIT_EXT: extended fuse_init_in request 362 * FUSE_INIT_RESERVED: reserved, do not use 363 * FUSE_SECURITY_CTX: add security context to create, mkdir, symlink, and 364 * mknod 365 * FUSE_HAS_INODE_DAX: use per inode DAX 366 * FUSE_CREATE_SUPP_GROUP: add supplementary group info to create, mkdir, 367 * symlink and mknod (single group that matches parent) 368 */ 369 #define FUSE_ASYNC_READ (1 << 0) 370 #define FUSE_POSIX_LOCKS (1 << 1) 371 #define FUSE_FILE_OPS (1 << 2) 372 #define FUSE_ATOMIC_O_TRUNC (1 << 3) 373 #define FUSE_EXPORT_SUPPORT (1 << 4) 374 #define FUSE_BIG_WRITES (1 << 5) 375 #define FUSE_DONT_MASK (1 << 6) 376 #define FUSE_SPLICE_WRITE (1 << 7) 377 #define FUSE_SPLICE_MOVE (1 << 8) 378 #define FUSE_SPLICE_READ (1 << 9) 379 #define FUSE_FLOCK_LOCKS (1 << 10) 380 #define FUSE_HAS_IOCTL_DIR (1 << 11) 381 #define FUSE_AUTO_INVAL_DATA (1 << 12) 382 #define FUSE_DO_READDIRPLUS (1 << 13) 383 #define FUSE_READDIRPLUS_AUTO (1 << 14) 384 #define FUSE_ASYNC_DIO (1 << 15) 385 #define FUSE_WRITEBACK_CACHE (1 << 16) 386 #define FUSE_NO_OPEN_SUPPORT (1 << 17) 387 #define FUSE_PARALLEL_DIROPS (1 << 18) 388 #define FUSE_HANDLE_KILLPRIV (1 << 19) 389 #define FUSE_POSIX_ACL (1 << 20) 390 #define FUSE_ABORT_ERROR (1 << 21) 391 #define FUSE_MAX_PAGES (1 << 22) 392 #define FUSE_CACHE_SYMLINKS (1 << 23) 393 #define FUSE_NO_OPENDIR_SUPPORT (1 << 24) 394 #define FUSE_EXPLICIT_INVAL_DATA (1 << 25) 395 #define FUSE_MAP_ALIGNMENT (1 << 26) 396 #define FUSE_SUBMOUNTS (1 << 27) 397 #define FUSE_HANDLE_KILLPRIV_V2 (1 << 28) 398 #define FUSE_SETXATTR_EXT (1 << 29) 399 #define FUSE_INIT_EXT (1 << 30) 400 #define FUSE_INIT_RESERVED (1 << 31) 401 /* bits 32..63 get shifted down 32 bits into the flags2 field */ 402 #define FUSE_SECURITY_CTX (1ULL << 32) 403 #define FUSE_HAS_INODE_DAX (1ULL << 33) 404 #define FUSE_CREATE_SUPP_GROUP (1ULL << 34) 405 406 /** 407 * CUSE INIT request/reply flags 408 * 409 * CUSE_UNRESTRICTED_IOCTL: use unrestricted ioctl 410 */ 411 #define CUSE_UNRESTRICTED_IOCTL (1 << 0) 412 413 /** 414 * Release flags 415 */ 416 #define FUSE_RELEASE_FLUSH (1 << 0) 417 #define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1) 418 419 /** 420 * Getattr flags 421 */ 422 #define FUSE_GETATTR_FH (1 << 0) 423 424 /** 425 * Lock flags 426 */ 427 #define FUSE_LK_FLOCK (1 << 0) 428 429 /** 430 * WRITE flags 431 * 432 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed 433 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid 434 * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits 435 */ 436 #define FUSE_WRITE_CACHE (1 << 0) 437 #define FUSE_WRITE_LOCKOWNER (1 << 1) 438 #define FUSE_WRITE_KILL_SUIDGID (1 << 2) 439 440 /* Obsolete alias; this flag implies killing suid/sgid only. */ 441 #define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID 442 443 /** 444 * Read flags 445 */ 446 #define FUSE_READ_LOCKOWNER (1 << 1) 447 448 /** 449 * Ioctl flags 450 * 451 * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine 452 * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed 453 * FUSE_IOCTL_RETRY: retry with new iovecs 454 * FUSE_IOCTL_32BIT: 32bit ioctl 455 * FUSE_IOCTL_DIR: is a directory 456 * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t) 457 * 458 * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs 459 */ 460 #define FUSE_IOCTL_COMPAT (1 << 0) 461 #define FUSE_IOCTL_UNRESTRICTED (1 << 1) 462 #define FUSE_IOCTL_RETRY (1 << 2) 463 #define FUSE_IOCTL_32BIT (1 << 3) 464 #define FUSE_IOCTL_DIR (1 << 4) 465 #define FUSE_IOCTL_COMPAT_X32 (1 << 5) 466 467 #define FUSE_IOCTL_MAX_IOV 256 468 469 /** 470 * Poll flags 471 * 472 * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify 473 */ 474 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0) 475 476 /** 477 * Fsync flags 478 * 479 * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata 480 */ 481 #define FUSE_FSYNC_FDATASYNC (1 << 0) 482 483 /** 484 * fuse_attr flags 485 * 486 * FUSE_ATTR_SUBMOUNT: Object is a submount root 487 * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode 488 */ 489 #define FUSE_ATTR_SUBMOUNT (1 << 0) 490 #define FUSE_ATTR_DAX (1 << 1) 491 492 /** 493 * Open flags 494 * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable 495 */ 496 #define FUSE_OPEN_KILL_SUIDGID (1 << 0) 497 498 /** 499 * setxattr flags 500 * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set 501 */ 502 #define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0) 503 504 /** 505 * notify_inval_entry flags 506 * FUSE_EXPIRE_ONLY 507 */ 508 #define FUSE_EXPIRE_ONLY (1 << 0) 509 510 /** 511 * extension type 512 * FUSE_MAX_NR_SECCTX: maximum value of &fuse_secctx_header.nr_secctx 513 * FUSE_EXT_GROUPS: &fuse_supp_groups extension 514 */ 515 enum fuse_ext_type { 516 /* Types 0..31 are reserved for fuse_secctx_header */ 517 FUSE_MAX_NR_SECCTX = 31, 518 FUSE_EXT_GROUPS = 32, 519 }; 520 521 enum fuse_opcode { 522 FUSE_LOOKUP = 1, 523 FUSE_FORGET = 2, /* no reply */ 524 FUSE_GETATTR = 3, 525 FUSE_SETATTR = 4, 526 FUSE_READLINK = 5, 527 FUSE_SYMLINK = 6, 528 FUSE_MKNOD = 8, 529 FUSE_MKDIR = 9, 530 FUSE_UNLINK = 10, 531 FUSE_RMDIR = 11, 532 FUSE_RENAME = 12, 533 FUSE_LINK = 13, 534 FUSE_OPEN = 14, 535 FUSE_READ = 15, 536 FUSE_WRITE = 16, 537 FUSE_STATFS = 17, 538 FUSE_RELEASE = 18, 539 FUSE_FSYNC = 20, 540 FUSE_SETXATTR = 21, 541 FUSE_GETXATTR = 22, 542 FUSE_LISTXATTR = 23, 543 FUSE_REMOVEXATTR = 24, 544 FUSE_FLUSH = 25, 545 FUSE_INIT = 26, 546 FUSE_OPENDIR = 27, 547 FUSE_READDIR = 28, 548 FUSE_RELEASEDIR = 29, 549 FUSE_FSYNCDIR = 30, 550 FUSE_GETLK = 31, 551 FUSE_SETLK = 32, 552 FUSE_SETLKW = 33, 553 FUSE_ACCESS = 34, 554 FUSE_CREATE = 35, 555 FUSE_INTERRUPT = 36, 556 FUSE_BMAP = 37, 557 FUSE_DESTROY = 38, 558 FUSE_IOCTL = 39, 559 FUSE_POLL = 40, 560 FUSE_NOTIFY_REPLY = 41, 561 FUSE_BATCH_FORGET = 42, 562 FUSE_FALLOCATE = 43, 563 FUSE_READDIRPLUS = 44, 564 FUSE_RENAME2 = 45, 565 FUSE_LSEEK = 46, 566 FUSE_COPY_FILE_RANGE = 47, 567 FUSE_SETUPMAPPING = 48, 568 FUSE_REMOVEMAPPING = 49, 569 FUSE_SYNCFS = 50, 570 FUSE_TMPFILE = 51, 571 572 /* CUSE specific operations */ 573 CUSE_INIT = 4096, 574 575 /* Reserved opcodes: helpful to detect structure endian-ness */ 576 CUSE_INIT_BSWAP_RESERVED = 1048576, /* CUSE_INIT << 8 */ 577 FUSE_INIT_BSWAP_RESERVED = 436207616, /* FUSE_INIT << 24 */ 578 }; 579 580 enum fuse_notify_code { 581 FUSE_NOTIFY_POLL = 1, 582 FUSE_NOTIFY_INVAL_INODE = 2, 583 FUSE_NOTIFY_INVAL_ENTRY = 3, 584 FUSE_NOTIFY_STORE = 4, 585 FUSE_NOTIFY_RETRIEVE = 5, 586 FUSE_NOTIFY_DELETE = 6, 587 FUSE_NOTIFY_CODE_MAX, 588 }; 589 590 /* The read buffer is required to be at least 8k, but may be much larger */ 591 #define FUSE_MIN_READ_BUFFER 8192 592 593 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120 594 595 struct fuse_entry_out { 596 uint64_t nodeid; /* Inode ID */ 597 uint64_t generation; /* Inode generation: nodeid:gen must 598 be unique for the fs's lifetime */ 599 uint64_t entry_valid; /* Cache timeout for the name */ 600 uint64_t attr_valid; /* Cache timeout for the attributes */ 601 uint32_t entry_valid_nsec; 602 uint32_t attr_valid_nsec; 603 struct fuse_attr attr; 604 }; 605 606 struct fuse_forget_in { 607 uint64_t nlookup; 608 }; 609 610 struct fuse_forget_one { 611 uint64_t nodeid; 612 uint64_t nlookup; 613 }; 614 615 struct fuse_batch_forget_in { 616 uint32_t count; 617 uint32_t dummy; 618 }; 619 620 struct fuse_getattr_in { 621 uint32_t getattr_flags; 622 uint32_t dummy; 623 uint64_t fh; 624 }; 625 626 #define FUSE_COMPAT_ATTR_OUT_SIZE 96 627 628 struct fuse_attr_out { 629 uint64_t attr_valid; /* Cache timeout for the attributes */ 630 uint32_t attr_valid_nsec; 631 uint32_t dummy; 632 struct fuse_attr attr; 633 }; 634 635 #define FUSE_COMPAT_MKNOD_IN_SIZE 8 636 637 struct fuse_mknod_in { 638 uint32_t mode; 639 uint32_t rdev; 640 uint32_t umask; 641 uint32_t padding; 642 }; 643 644 struct fuse_mkdir_in { 645 uint32_t mode; 646 uint32_t umask; 647 }; 648 649 struct fuse_rename_in { 650 uint64_t newdir; 651 }; 652 653 struct fuse_rename2_in { 654 uint64_t newdir; 655 uint32_t flags; 656 uint32_t padding; 657 }; 658 659 struct fuse_link_in { 660 uint64_t oldnodeid; 661 }; 662 663 struct fuse_setattr_in { 664 uint32_t valid; 665 uint32_t padding; 666 uint64_t fh; 667 uint64_t size; 668 uint64_t lock_owner; 669 uint64_t atime; 670 uint64_t mtime; 671 uint64_t ctime; 672 uint32_t atimensec; 673 uint32_t mtimensec; 674 uint32_t ctimensec; 675 uint32_t mode; 676 uint32_t unused4; 677 uint32_t uid; 678 uint32_t gid; 679 uint32_t unused5; 680 }; 681 682 struct fuse_open_in { 683 uint32_t flags; 684 uint32_t open_flags; /* FUSE_OPEN_... */ 685 }; 686 687 struct fuse_create_in { 688 uint32_t flags; 689 uint32_t mode; 690 uint32_t umask; 691 uint32_t open_flags; /* FUSE_OPEN_... */ 692 }; 693 694 struct fuse_open_out { 695 uint64_t fh; 696 uint32_t open_flags; 697 uint32_t padding; 698 }; 699 700 struct fuse_release_in { 701 uint64_t fh; 702 uint32_t flags; 703 uint32_t release_flags; 704 uint64_t lock_owner; 705 }; 706 707 struct fuse_flush_in { 708 uint64_t fh; 709 uint32_t unused; 710 uint32_t padding; 711 uint64_t lock_owner; 712 }; 713 714 struct fuse_read_in { 715 uint64_t fh; 716 uint64_t offset; 717 uint32_t size; 718 uint32_t read_flags; 719 uint64_t lock_owner; 720 uint32_t flags; 721 uint32_t padding; 722 }; 723 724 #define FUSE_COMPAT_WRITE_IN_SIZE 24 725 726 struct fuse_write_in { 727 uint64_t fh; 728 uint64_t offset; 729 uint32_t size; 730 uint32_t write_flags; 731 uint64_t lock_owner; 732 uint32_t flags; 733 uint32_t padding; 734 }; 735 736 struct fuse_write_out { 737 uint32_t size; 738 uint32_t padding; 739 }; 740 741 #define FUSE_COMPAT_STATFS_SIZE 48 742 743 struct fuse_statfs_out { 744 struct fuse_kstatfs st; 745 }; 746 747 struct fuse_fsync_in { 748 uint64_t fh; 749 uint32_t fsync_flags; 750 uint32_t padding; 751 }; 752 753 #define FUSE_COMPAT_SETXATTR_IN_SIZE 8 754 755 struct fuse_setxattr_in { 756 uint32_t size; 757 uint32_t flags; 758 uint32_t setxattr_flags; 759 uint32_t padding; 760 }; 761 762 struct fuse_getxattr_in { 763 uint32_t size; 764 uint32_t padding; 765 }; 766 767 struct fuse_getxattr_out { 768 uint32_t size; 769 uint32_t padding; 770 }; 771 772 struct fuse_lk_in { 773 uint64_t fh; 774 uint64_t owner; 775 struct fuse_file_lock lk; 776 uint32_t lk_flags; 777 uint32_t padding; 778 }; 779 780 struct fuse_lk_out { 781 struct fuse_file_lock lk; 782 }; 783 784 struct fuse_access_in { 785 uint32_t mask; 786 uint32_t padding; 787 }; 788 789 struct fuse_init_in { 790 uint32_t major; 791 uint32_t minor; 792 uint32_t max_readahead; 793 uint32_t flags; 794 uint32_t flags2; 795 uint32_t unused[11]; 796 }; 797 798 #define FUSE_COMPAT_INIT_OUT_SIZE 8 799 #define FUSE_COMPAT_22_INIT_OUT_SIZE 24 800 801 struct fuse_init_out { 802 uint32_t major; 803 uint32_t minor; 804 uint32_t max_readahead; 805 uint32_t flags; 806 uint16_t max_background; 807 uint16_t congestion_threshold; 808 uint32_t max_write; 809 uint32_t time_gran; 810 uint16_t max_pages; 811 uint16_t map_alignment; 812 uint32_t flags2; 813 uint32_t unused[7]; 814 }; 815 816 #define CUSE_INIT_INFO_MAX 4096 817 818 struct cuse_init_in { 819 uint32_t major; 820 uint32_t minor; 821 uint32_t unused; 822 uint32_t flags; 823 }; 824 825 struct cuse_init_out { 826 uint32_t major; 827 uint32_t minor; 828 uint32_t unused; 829 uint32_t flags; 830 uint32_t max_read; 831 uint32_t max_write; 832 uint32_t dev_major; /* chardev major */ 833 uint32_t dev_minor; /* chardev minor */ 834 uint32_t spare[10]; 835 }; 836 837 struct fuse_interrupt_in { 838 uint64_t unique; 839 }; 840 841 struct fuse_bmap_in { 842 uint64_t block; 843 uint32_t blocksize; 844 uint32_t padding; 845 }; 846 847 struct fuse_bmap_out { 848 uint64_t block; 849 }; 850 851 struct fuse_ioctl_in { 852 uint64_t fh; 853 uint32_t flags; 854 uint32_t cmd; 855 uint64_t arg; 856 uint32_t in_size; 857 uint32_t out_size; 858 }; 859 860 struct fuse_ioctl_iovec { 861 uint64_t base; 862 uint64_t len; 863 }; 864 865 struct fuse_ioctl_out { 866 int32_t result; 867 uint32_t flags; 868 uint32_t in_iovs; 869 uint32_t out_iovs; 870 }; 871 872 struct fuse_poll_in { 873 uint64_t fh; 874 uint64_t kh; 875 uint32_t flags; 876 uint32_t events; 877 }; 878 879 struct fuse_poll_out { 880 uint32_t revents; 881 uint32_t padding; 882 }; 883 884 struct fuse_notify_poll_wakeup_out { 885 uint64_t kh; 886 }; 887 888 struct fuse_fallocate_in { 889 uint64_t fh; 890 uint64_t offset; 891 uint64_t length; 892 uint32_t mode; 893 uint32_t padding; 894 }; 895 896 struct fuse_in_header { 897 uint32_t len; 898 uint32_t opcode; 899 uint64_t unique; 900 uint64_t nodeid; 901 uint32_t uid; 902 uint32_t gid; 903 uint32_t pid; 904 uint16_t total_extlen; /* length of extensions in 8byte units */ 905 uint16_t padding; 906 }; 907 908 struct fuse_out_header { 909 uint32_t len; 910 int32_t error; 911 uint64_t unique; 912 }; 913 914 struct fuse_dirent { 915 uint64_t ino; 916 uint64_t off; 917 uint32_t namelen; 918 uint32_t type; 919 char name[]; 920 }; 921 922 /* Align variable length records to 64bit boundary */ 923 #define FUSE_REC_ALIGN(x) \ 924 (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1)) 925 926 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name) 927 #define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x) 928 #define FUSE_DIRENT_SIZE(d) \ 929 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen) 930 931 struct fuse_direntplus { 932 struct fuse_entry_out entry_out; 933 struct fuse_dirent dirent; 934 }; 935 936 #define FUSE_NAME_OFFSET_DIRENTPLUS \ 937 offsetof(struct fuse_direntplus, dirent.name) 938 #define FUSE_DIRENTPLUS_SIZE(d) \ 939 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen) 940 941 struct fuse_notify_inval_inode_out { 942 uint64_t ino; 943 int64_t off; 944 int64_t len; 945 }; 946 947 struct fuse_notify_inval_entry_out { 948 uint64_t parent; 949 uint32_t namelen; 950 uint32_t flags; 951 }; 952 953 struct fuse_notify_delete_out { 954 uint64_t parent; 955 uint64_t child; 956 uint32_t namelen; 957 uint32_t padding; 958 }; 959 960 struct fuse_notify_store_out { 961 uint64_t nodeid; 962 uint64_t offset; 963 uint32_t size; 964 uint32_t padding; 965 }; 966 967 struct fuse_notify_retrieve_out { 968 uint64_t notify_unique; 969 uint64_t nodeid; 970 uint64_t offset; 971 uint32_t size; 972 uint32_t padding; 973 }; 974 975 /* Matches the size of fuse_write_in */ 976 struct fuse_notify_retrieve_in { 977 uint64_t dummy1; 978 uint64_t offset; 979 uint32_t size; 980 uint32_t dummy2; 981 uint64_t dummy3; 982 uint64_t dummy4; 983 }; 984 985 /* Device ioctls: */ 986 #define FUSE_DEV_IOC_MAGIC 229 987 #define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t) 988 989 struct fuse_lseek_in { 990 uint64_t fh; 991 uint64_t offset; 992 uint32_t whence; 993 uint32_t padding; 994 }; 995 996 struct fuse_lseek_out { 997 uint64_t offset; 998 }; 999 1000 struct fuse_copy_file_range_in { 1001 uint64_t fh_in; 1002 uint64_t off_in; 1003 uint64_t nodeid_out; 1004 uint64_t fh_out; 1005 uint64_t off_out; 1006 uint64_t len; 1007 uint64_t flags; 1008 }; 1009 1010 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0) 1011 #define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1) 1012 struct fuse_setupmapping_in { 1013 /* An already open handle */ 1014 uint64_t fh; 1015 /* Offset into the file to start the mapping */ 1016 uint64_t foffset; 1017 /* Length of mapping required */ 1018 uint64_t len; 1019 /* Flags, FUSE_SETUPMAPPING_FLAG_* */ 1020 uint64_t flags; 1021 /* Offset in Memory Window */ 1022 uint64_t moffset; 1023 }; 1024 1025 struct fuse_removemapping_in { 1026 /* number of fuse_removemapping_one follows */ 1027 uint32_t count; 1028 }; 1029 1030 struct fuse_removemapping_one { 1031 /* Offset into the dax window start the unmapping */ 1032 uint64_t moffset; 1033 /* Length of mapping required */ 1034 uint64_t len; 1035 }; 1036 1037 #define FUSE_REMOVEMAPPING_MAX_ENTRY \ 1038 (PAGE_SIZE / sizeof(struct fuse_removemapping_one)) 1039 1040 struct fuse_syncfs_in { 1041 uint64_t padding; 1042 }; 1043 1044 /* 1045 * For each security context, send fuse_secctx with size of security context 1046 * fuse_secctx will be followed by security context name and this in turn 1047 * will be followed by actual context label. 1048 * fuse_secctx, name, context 1049 */ 1050 struct fuse_secctx { 1051 uint32_t size; 1052 uint32_t padding; 1053 }; 1054 1055 /* 1056 * Contains the information about how many fuse_secctx structures are being 1057 * sent and what's the total size of all security contexts (including 1058 * size of fuse_secctx_header). 1059 * 1060 */ 1061 struct fuse_secctx_header { 1062 uint32_t size; 1063 uint32_t nr_secctx; 1064 }; 1065 1066 /** 1067 * struct fuse_ext_header - extension header 1068 * @size: total size of this extension including this header 1069 * @type: type of extension 1070 * 1071 * This is made compatible with fuse_secctx_header by using type values > 1072 * FUSE_MAX_NR_SECCTX 1073 */ 1074 struct fuse_ext_header { 1075 uint32_t size; 1076 uint32_t type; 1077 }; 1078 1079 /** 1080 * struct fuse_supp_groups - Supplementary group extension 1081 * @nr_groups: number of supplementary groups 1082 * @groups: flexible array of group IDs 1083 */ 1084 struct fuse_supp_groups { 1085 uint32_t nr_groups; 1086 uint32_t groups[]; 1087 }; 1088 1089 #endif /* _LINUX_FUSE_H */ 1090