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