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