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