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      1 /*
      2     This file defines the kernel interface of FUSE
      3     Copyright (C) 2001-2008  Miklos Szeredi <miklos (at) szeredi.hu>
      4 
      5     This program can be distributed under the terms of the GNU GPL.
      6     See the file COPYING.
      7 
      8     This -- and only this -- header file may also be distributed under
      9     the terms of the BSD Licence as follows:
     10 
     11     Copyright (C) 2001-2007 Miklos Szeredi. All rights reserved.
     12 
     13     Redistribution and use in source and binary forms, with or without
     14     modification, are permitted provided that the following conditions
     15     are met:
     16     1. Redistributions of source code must retain the above copyright
     17        notice, this list of conditions and the following disclaimer.
     18     2. Redistributions in binary form must reproduce the above copyright
     19        notice, this list of conditions and the following disclaimer in the
     20        documentation and/or other materials provided with the distribution.
     21 
     22     THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     23     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25     ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
     26     FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28     OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32     SUCH DAMAGE.
     33 */
     34 
     35 /*
     36  * This file defines the kernel interface of FUSE
     37  *
     38  * Protocol changelog:
     39  *
     40  * 7.9:
     41  *  - new fuse_getattr_in input argument of GETATTR
     42  *  - add lk_flags in fuse_lk_in
     43  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
     44  *  - add blksize field to fuse_attr
     45  *  - add file flags field to fuse_read_in and fuse_write_in
     46  *
     47  * 7.10
     48  *  - add nonseekable open flag
     49  *
     50  * 7.11
     51  *  - add IOCTL message
     52  *  - add unsolicited notification support
     53  *  - add POLL message and NOTIFY_POLL notification
     54  *
     55  * 7.12
     56  *  - add umask flag to input argument of open, mknod and mkdir
     57  *  - add notification messages for invalidation of inodes and
     58  *    directory entries
     59  *
     60  * 7.13
     61  *  - make max number of background requests and congestion threshold
     62  *    tunables
     63  *
     64  * 7.14
     65  *  - add splice support to fuse device
     66  *
     67  * 7.15
     68  *  - add store notify
     69  *  - add retrieve notify
     70  *
     71  * 7.16
     72  *  - add BATCH_FORGET request
     73  *  - FUSE_IOCTL_UNRESTRICTED shall now return with array of 'struct
     74  *    fuse_ioctl_iovec' instead of ambiguous 'struct iovec'
     75  *  - add FUSE_IOCTL_32BIT flag
     76  *
     77  * 7.17
     78  *  - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
     79  *
     80  * 7.18
     81  *  - add FUSE_IOCTL_DIR flag
     82  *  - add FUSE_NOTIFY_DELETE
     83  *
     84  * 7.19
     85  *  - add FUSE_FALLOCATE
     86  *
     87  * 7.20
     88  *  - add FUSE_AUTO_INVAL_DATA
     89  *
     90  * 7.21
     91  *  - add FUSE_READDIRPLUS
     92  *  - send the requested events in POLL request
     93  *
     94  * 7.22
     95  *  - add FUSE_ASYNC_DIO
     96  *
     97  * 7.23
     98  *  - add FUSE_WRITEBACK_CACHE
     99  */
    100 
    101 #ifndef _LINUX_FUSE_H
    102 #define _LINUX_FUSE_H
    103 
    104 #ifdef __KERNEL__
    105 #include <linux/types.h>
    106 #else
    107 #include <stdint.h>
    108 #endif
    109 
    110 /*
    111  * Version negotiation:
    112  *
    113  * Both the kernel and userspace send the version they support in the
    114  * INIT request and reply respectively.
    115  *
    116  * If the major versions match then both shall use the smallest
    117  * of the two minor versions for communication.
    118  *
    119  * If the kernel supports a larger major version, then userspace shall
    120  * reply with the major version it supports, ignore the rest of the
    121  * INIT message and expect a new INIT message from the kernel with a
    122  * matching major version.
    123  *
    124  * If the library supports a larger major version, then it shall fall
    125  * back to the major protocol version sent by the kernel for
    126  * communication and reply with that major version (and an arbitrary
    127  * supported minor version).
    128  */
    129 
    130 /** Version number of this interface */
    131 #define FUSE_KERNEL_VERSION 7
    132 
    133 /** Minor version number of this interface */
    134 #define FUSE_KERNEL_MINOR_VERSION 23
    135 
    136 /** The node ID of the root inode */
    137 #define FUSE_ROOT_ID 1
    138 
    139 /* Make sure all structures are padded to 64bit boundary, so 32bit
    140    userspace works under 64bit kernels */
    141 
    142 struct fuse_attr {
    143 	uint64_t	ino;
    144 	uint64_t	size;
    145 	uint64_t	blocks;
    146 	uint64_t	atime;
    147 	uint64_t	mtime;
    148 	uint64_t	ctime;
    149 	uint32_t	atimensec;
    150 	uint32_t	mtimensec;
    151 	uint32_t	ctimensec;
    152 	uint32_t	mode;
    153 	uint32_t	nlink;
    154 	uint32_t	uid;
    155 	uint32_t	gid;
    156 	uint32_t	rdev;
    157 	uint32_t	blksize;
    158 	uint32_t	padding;
    159 };
    160 
    161 struct fuse_kstatfs {
    162 	uint64_t	blocks;
    163 	uint64_t	bfree;
    164 	uint64_t	bavail;
    165 	uint64_t	files;
    166 	uint64_t	ffree;
    167 	uint32_t	bsize;
    168 	uint32_t	namelen;
    169 	uint32_t	frsize;
    170 	uint32_t	padding;
    171 	uint32_t	spare[6];
    172 };
    173 
    174 struct fuse_file_lock {
    175 	uint64_t	start;
    176 	uint64_t	end;
    177 	uint32_t	type;
    178 	uint32_t	pid; /* tgid */
    179 };
    180 
    181 /**
    182  * Bitmasks for fuse_setattr_in.valid
    183  */
    184 #define FATTR_MODE	(1 << 0)
    185 #define FATTR_UID	(1 << 1)
    186 #define FATTR_GID	(1 << 2)
    187 #define FATTR_SIZE	(1 << 3)
    188 #define FATTR_ATIME	(1 << 4)
    189 #define FATTR_MTIME	(1 << 5)
    190 #define FATTR_FH	(1 << 6)
    191 #define FATTR_ATIME_NOW	(1 << 7)
    192 #define FATTR_MTIME_NOW	(1 << 8)
    193 #define FATTR_LOCKOWNER	(1 << 9)
    194 
    195 /**
    196  * Flags returned by the OPEN request
    197  *
    198  * FOPEN_DIRECT_IO: bypass page cache for this open file
    199  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
    200  * FOPEN_NONSEEKABLE: the file is not seekable
    201  */
    202 #define FOPEN_DIRECT_IO		(1 << 0)
    203 #define FOPEN_KEEP_CACHE	(1 << 1)
    204 #define FOPEN_NONSEEKABLE	(1 << 2)
    205 
    206 /**
    207  * INIT request/reply flags
    208  *
    209  * FUSE_ASYNC_READ: asynchronous read requests
    210  * FUSE_POSIX_LOCKS: remote locking for POSIX file locks
    211  * FUSE_FILE_OPS: kernel sends file handle for fstat, etc... (not yet supported)
    212  * FUSE_ATOMIC_O_TRUNC: handles the O_TRUNC open flag in the filesystem
    213  * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
    214  * FUSE_BIG_WRITES: filesystem can handle write size larger than 4kB
    215  * FUSE_DONT_MASK: don't apply umask to file mode on create operations
    216  * FUSE_SPLICE_WRITE: kernel supports splice write on the device
    217  * FUSE_SPLICE_MOVE: kernel supports splice move on the device
    218  * FUSE_SPLICE_READ: kernel supports splice read on the device
    219  * FUSE_FLOCK_LOCKS: remote locking for BSD style file locks
    220  * FUSE_HAS_IOCTL_DIR: kernel supports ioctl on directories
    221  * FUSE_AUTO_INVAL_DATA: automatically invalidate cached pages
    222  * FUSE_DO_READDIRPLUS: do READDIRPLUS (READDIR+LOOKUP in one)
    223  * FUSE_READDIRPLUS_AUTO: adaptive readdirplus
    224  * FUSE_ASYNC_DIO: asynchronous direct I/O submission
    225  * FUSE_WRITEBACK_CACHE: use writeback cache for buffered writes
    226  */
    227 #define FUSE_ASYNC_READ		(1 << 0)
    228 #define FUSE_POSIX_LOCKS	(1 << 1)
    229 #define FUSE_FILE_OPS		(1 << 2)
    230 #define FUSE_ATOMIC_O_TRUNC	(1 << 3)
    231 #define FUSE_EXPORT_SUPPORT	(1 << 4)
    232 #define FUSE_BIG_WRITES		(1 << 5)
    233 #define FUSE_DONT_MASK		(1 << 6)
    234 #define FUSE_SPLICE_WRITE	(1 << 7)
    235 #define FUSE_SPLICE_MOVE	(1 << 8)
    236 #define FUSE_SPLICE_READ	(1 << 9)
    237 #define FUSE_FLOCK_LOCKS	(1 << 10)
    238 #define FUSE_HAS_IOCTL_DIR	(1 << 11)
    239 #define FUSE_AUTO_INVAL_DATA	(1 << 12)
    240 #define FUSE_DO_READDIRPLUS	(1 << 13)
    241 #define FUSE_READDIRPLUS_AUTO	(1 << 14)
    242 #define FUSE_ASYNC_DIO		(1 << 15)
    243 #define FUSE_WRITEBACK_CACHE	(1 << 16)
    244 
    245 #define FUSE_SHORTCIRCUIT	(1 << 31)
    246 
    247 /**
    248  * CUSE INIT request/reply flags
    249  *
    250  * CUSE_UNRESTRICTED_IOCTL:  use unrestricted ioctl
    251  */
    252 #define CUSE_UNRESTRICTED_IOCTL	(1 << 0)
    253 
    254 /**
    255  * Release flags
    256  */
    257 #define FUSE_RELEASE_FLUSH	(1 << 0)
    258 #define FUSE_RELEASE_FLOCK_UNLOCK	(1 << 1)
    259 
    260 /**
    261  * Getattr flags
    262  */
    263 #define FUSE_GETATTR_FH		(1 << 0)
    264 
    265 /**
    266  * Lock flags
    267  */
    268 #define FUSE_LK_FLOCK		(1 << 0)
    269 
    270 /**
    271  * WRITE flags
    272  *
    273  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
    274  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
    275  */
    276 #define FUSE_WRITE_CACHE	(1 << 0)
    277 #define FUSE_WRITE_LOCKOWNER	(1 << 1)
    278 
    279 /**
    280  * Read flags
    281  */
    282 #define FUSE_READ_LOCKOWNER	(1 << 1)
    283 
    284 /**
    285  * Ioctl flags
    286  *
    287  * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine
    288  * FUSE_IOCTL_UNRESTRICTED: not restricted to well-formed ioctls, retry allowed
    289  * FUSE_IOCTL_RETRY: retry with new iovecs
    290  * FUSE_IOCTL_32BIT: 32bit ioctl
    291  * FUSE_IOCTL_DIR: is a directory
    292  *
    293  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
    294  */
    295 #define FUSE_IOCTL_COMPAT	(1 << 0)
    296 #define FUSE_IOCTL_UNRESTRICTED	(1 << 1)
    297 #define FUSE_IOCTL_RETRY	(1 << 2)
    298 #define FUSE_IOCTL_32BIT	(1 << 3)
    299 #define FUSE_IOCTL_DIR		(1 << 4)
    300 
    301 #define FUSE_IOCTL_MAX_IOV	256
    302 
    303 /**
    304  * Poll flags
    305  *
    306  * FUSE_POLL_SCHEDULE_NOTIFY: request poll notify
    307  */
    308 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
    309 
    310 enum fuse_opcode {
    311 	FUSE_LOOKUP	   = 1,
    312 	FUSE_FORGET	   = 2,  /* no reply */
    313 	FUSE_GETATTR	   = 3,
    314 	FUSE_SETATTR	   = 4,
    315 	FUSE_READLINK	   = 5,
    316 	FUSE_SYMLINK	   = 6,
    317 	FUSE_MKNOD	   = 8,
    318 	FUSE_MKDIR	   = 9,
    319 	FUSE_UNLINK	   = 10,
    320 	FUSE_RMDIR	   = 11,
    321 	FUSE_RENAME	   = 12,
    322 	FUSE_LINK	   = 13,
    323 	FUSE_OPEN	   = 14,
    324 	FUSE_READ	   = 15,
    325 	FUSE_WRITE	   = 16,
    326 	FUSE_STATFS	   = 17,
    327 	FUSE_RELEASE       = 18,
    328 	FUSE_FSYNC         = 20,
    329 	FUSE_SETXATTR      = 21,
    330 	FUSE_GETXATTR      = 22,
    331 	FUSE_LISTXATTR     = 23,
    332 	FUSE_REMOVEXATTR   = 24,
    333 	FUSE_FLUSH         = 25,
    334 	FUSE_INIT          = 26,
    335 	FUSE_OPENDIR       = 27,
    336 	FUSE_READDIR       = 28,
    337 	FUSE_RELEASEDIR    = 29,
    338 	FUSE_FSYNCDIR      = 30,
    339 	FUSE_GETLK         = 31,
    340 	FUSE_SETLK         = 32,
    341 	FUSE_SETLKW        = 33,
    342 	FUSE_ACCESS        = 34,
    343 	FUSE_CREATE        = 35,
    344 	FUSE_INTERRUPT     = 36,
    345 	FUSE_BMAP          = 37,
    346 	FUSE_DESTROY       = 38,
    347 	FUSE_IOCTL         = 39,
    348 	FUSE_POLL          = 40,
    349 	FUSE_NOTIFY_REPLY  = 41,
    350 	FUSE_BATCH_FORGET  = 42,
    351 	FUSE_FALLOCATE     = 43,
    352 	FUSE_READDIRPLUS   = 44,
    353 	FUSE_CANONICAL_PATH= 2016,
    354 
    355 	/* CUSE specific operations */
    356 	CUSE_INIT          = 4096,
    357 };
    358 
    359 enum fuse_notify_code {
    360 	FUSE_NOTIFY_POLL   = 1,
    361 	FUSE_NOTIFY_INVAL_INODE = 2,
    362 	FUSE_NOTIFY_INVAL_ENTRY = 3,
    363 	FUSE_NOTIFY_STORE = 4,
    364 	FUSE_NOTIFY_RETRIEVE = 5,
    365 	FUSE_NOTIFY_DELETE = 6,
    366 	FUSE_NOTIFY_CODE_MAX,
    367 };
    368 
    369 /* The read buffer is required to be at least 8k, but may be much larger */
    370 #define FUSE_MIN_READ_BUFFER 8192
    371 
    372 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
    373 
    374 struct fuse_entry_out {
    375 	uint64_t	nodeid;		/* Inode ID */
    376 	uint64_t	generation;	/* Inode generation: nodeid:gen must
    377 					   be unique for the fs's lifetime */
    378 	uint64_t	entry_valid;	/* Cache timeout for the name */
    379 	uint64_t	attr_valid;	/* Cache timeout for the attributes */
    380 	uint32_t	entry_valid_nsec;
    381 	uint32_t	attr_valid_nsec;
    382 	struct fuse_attr attr;
    383 };
    384 
    385 struct fuse_forget_in {
    386 	uint64_t	nlookup;
    387 };
    388 
    389 struct fuse_forget_one {
    390 	uint64_t	nodeid;
    391 	uint64_t	nlookup;
    392 };
    393 
    394 struct fuse_batch_forget_in {
    395 	uint32_t	count;
    396 	uint32_t	dummy;
    397 };
    398 
    399 struct fuse_getattr_in {
    400 	uint32_t	getattr_flags;
    401 	uint32_t	dummy;
    402 	uint64_t	fh;
    403 };
    404 
    405 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
    406 
    407 struct fuse_attr_out {
    408 	uint64_t	attr_valid;	/* Cache timeout for the attributes */
    409 	uint32_t	attr_valid_nsec;
    410 	uint32_t	dummy;
    411 	struct fuse_attr attr;
    412 };
    413 
    414 #define FUSE_COMPAT_MKNOD_IN_SIZE 8
    415 
    416 struct fuse_mknod_in {
    417 	uint32_t	mode;
    418 	uint32_t	rdev;
    419 	uint32_t	umask;
    420 	uint32_t	padding;
    421 };
    422 
    423 struct fuse_mkdir_in {
    424 	uint32_t	mode;
    425 	uint32_t	umask;
    426 };
    427 
    428 struct fuse_rename_in {
    429 	uint64_t	newdir;
    430 };
    431 
    432 struct fuse_link_in {
    433 	uint64_t	oldnodeid;
    434 };
    435 
    436 struct fuse_setattr_in {
    437 	uint32_t	valid;
    438 	uint32_t	padding;
    439 	uint64_t	fh;
    440 	uint64_t	size;
    441 	uint64_t	lock_owner;
    442 	uint64_t	atime;
    443 	uint64_t	mtime;
    444 	uint64_t	unused2;
    445 	uint32_t	atimensec;
    446 	uint32_t	mtimensec;
    447 	uint32_t	unused3;
    448 	uint32_t	mode;
    449 	uint32_t	unused4;
    450 	uint32_t	uid;
    451 	uint32_t	gid;
    452 	uint32_t	unused5;
    453 };
    454 
    455 struct fuse_open_in {
    456 	uint32_t	flags;
    457 	uint32_t	unused;
    458 };
    459 
    460 struct fuse_create_in {
    461 	uint32_t	flags;
    462 	uint32_t	mode;
    463 	uint32_t	umask;
    464 	uint32_t	padding;
    465 };
    466 
    467 struct fuse_open_out {
    468 	uint64_t	fh;
    469 	uint32_t	open_flags;
    470         union {
    471 	        int32_t  lower_fd;/* lower layer file descriptor */
    472                 uint32_t padding;
    473         };
    474 };
    475 
    476 struct fuse_release_in {
    477 	uint64_t	fh;
    478 	uint32_t	flags;
    479 	uint32_t	release_flags;
    480 	uint64_t	lock_owner;
    481 };
    482 
    483 struct fuse_flush_in {
    484 	uint64_t	fh;
    485 	uint32_t	unused;
    486 	uint32_t	padding;
    487 	uint64_t	lock_owner;
    488 };
    489 
    490 struct fuse_read_in {
    491 	uint64_t	fh;
    492 	uint64_t	offset;
    493 	uint32_t	size;
    494 	uint32_t	read_flags;
    495 	uint64_t	lock_owner;
    496 	uint32_t	flags;
    497 	uint32_t	padding;
    498 };
    499 
    500 #define FUSE_COMPAT_WRITE_IN_SIZE 24
    501 
    502 struct fuse_write_in {
    503 	uint64_t	fh;
    504 	uint64_t	offset;
    505 	uint32_t	size;
    506 	uint32_t	write_flags;
    507 	uint64_t	lock_owner;
    508 	uint32_t	flags;
    509 	uint32_t	padding;
    510 };
    511 
    512 struct fuse_write_out {
    513 	uint32_t	size;
    514 	uint32_t	padding;
    515 };
    516 
    517 #define FUSE_COMPAT_STATFS_SIZE 48
    518 
    519 struct fuse_statfs_out {
    520 	struct fuse_kstatfs st;
    521 };
    522 
    523 struct fuse_fsync_in {
    524 	uint64_t	fh;
    525 	uint32_t	fsync_flags;
    526 	uint32_t	padding;
    527 };
    528 
    529 struct fuse_setxattr_in {
    530 	uint32_t	size;
    531 	uint32_t	flags;
    532 };
    533 
    534 struct fuse_getxattr_in {
    535 	uint32_t	size;
    536 	uint32_t	padding;
    537 };
    538 
    539 struct fuse_getxattr_out {
    540 	uint32_t	size;
    541 	uint32_t	padding;
    542 };
    543 
    544 struct fuse_lk_in {
    545 	uint64_t	fh;
    546 	uint64_t	owner;
    547 	struct fuse_file_lock lk;
    548 	uint32_t	lk_flags;
    549 	uint32_t	padding;
    550 };
    551 
    552 struct fuse_lk_out {
    553 	struct fuse_file_lock lk;
    554 };
    555 
    556 struct fuse_access_in {
    557 	uint32_t	mask;
    558 	uint32_t	padding;
    559 };
    560 
    561 struct fuse_init_in {
    562 	uint32_t	major;
    563 	uint32_t	minor;
    564 	uint32_t	max_readahead;
    565 	uint32_t	flags;
    566 };
    567 
    568 struct fuse_init_out {
    569 	uint32_t	major;
    570 	uint32_t	minor;
    571 	uint32_t	max_readahead;
    572 	uint32_t	flags;
    573 	uint16_t	max_background;
    574 	uint16_t	congestion_threshold;
    575 	uint32_t	max_write;
    576 };
    577 
    578 #define CUSE_INIT_INFO_MAX 4096
    579 
    580 struct cuse_init_in {
    581 	uint32_t	major;
    582 	uint32_t	minor;
    583 	uint32_t	unused;
    584 	uint32_t	flags;
    585 };
    586 
    587 struct cuse_init_out {
    588 	uint32_t	major;
    589 	uint32_t	minor;
    590 	uint32_t	unused;
    591 	uint32_t	flags;
    592 	uint32_t	max_read;
    593 	uint32_t	max_write;
    594 	uint32_t	dev_major;		/* chardev major */
    595 	uint32_t	dev_minor;		/* chardev minor */
    596 	uint32_t	spare[10];
    597 };
    598 
    599 struct fuse_interrupt_in {
    600 	uint64_t	unique;
    601 };
    602 
    603 struct fuse_bmap_in {
    604 	uint64_t	block;
    605 	uint32_t	blocksize;
    606 	uint32_t	padding;
    607 };
    608 
    609 struct fuse_bmap_out {
    610 	uint64_t	block;
    611 };
    612 
    613 struct fuse_ioctl_in {
    614 	uint64_t	fh;
    615 	uint32_t	flags;
    616 	uint32_t	cmd;
    617 	uint64_t	arg;
    618 	uint32_t	in_size;
    619 	uint32_t	out_size;
    620 };
    621 
    622 struct fuse_ioctl_iovec {
    623 	uint64_t	base;
    624 	uint64_t	len;
    625 };
    626 
    627 struct fuse_ioctl_out {
    628 	int32_t		result;
    629 	uint32_t	flags;
    630 	uint32_t	in_iovs;
    631 	uint32_t	out_iovs;
    632 };
    633 
    634 struct fuse_poll_in {
    635 	uint64_t	fh;
    636 	uint64_t	kh;
    637 	uint32_t	flags;
    638 	uint32_t	events;
    639 };
    640 
    641 struct fuse_poll_out {
    642 	uint32_t	revents;
    643 	uint32_t	padding;
    644 };
    645 
    646 struct fuse_notify_poll_wakeup_out {
    647 	uint64_t	kh;
    648 };
    649 
    650 struct fuse_fallocate_in {
    651 	uint64_t	fh;
    652 	uint64_t	offset;
    653 	uint64_t	length;
    654 	uint32_t	mode;
    655 	uint32_t	padding;
    656 };
    657 
    658 struct fuse_in_header {
    659 	uint32_t	len;
    660 	uint32_t	opcode;
    661 	uint64_t	unique;
    662 	uint64_t	nodeid;
    663 	uint32_t	uid;
    664 	uint32_t	gid;
    665 	uint32_t	pid;
    666 	uint32_t	padding;
    667 };
    668 
    669 struct fuse_out_header {
    670 	uint32_t	len;
    671 	int32_t		error;
    672 	uint64_t	unique;
    673 };
    674 
    675 struct fuse_dirent {
    676 	uint64_t	ino;
    677 	uint64_t	off;
    678 	uint32_t	namelen;
    679 	uint32_t	type;
    680 	char name[];
    681 };
    682 
    683 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
    684 #define FUSE_DIRENT_ALIGN(x) \
    685 	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
    686 #define FUSE_DIRENT_SIZE(d) \
    687 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
    688 
    689 struct fuse_direntplus {
    690 	struct fuse_entry_out entry_out;
    691 	struct fuse_dirent dirent;
    692 };
    693 
    694 #define FUSE_NAME_OFFSET_DIRENTPLUS \
    695 	offsetof(struct fuse_direntplus, dirent.name)
    696 #define FUSE_DIRENTPLUS_SIZE(d) \
    697 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
    698 
    699 struct fuse_notify_inval_inode_out {
    700 	uint64_t	ino;
    701 	int64_t		off;
    702 	int64_t		len;
    703 };
    704 
    705 struct fuse_notify_inval_entry_out {
    706 	uint64_t	parent;
    707 	uint32_t	namelen;
    708 	uint32_t	padding;
    709 };
    710 
    711 struct fuse_notify_delete_out {
    712 	uint64_t	parent;
    713 	uint64_t	child;
    714 	uint32_t	namelen;
    715 	uint32_t	padding;
    716 };
    717 
    718 struct fuse_notify_store_out {
    719 	uint64_t	nodeid;
    720 	uint64_t	offset;
    721 	uint32_t	size;
    722 	uint32_t	padding;
    723 };
    724 
    725 struct fuse_notify_retrieve_out {
    726 	uint64_t	notify_unique;
    727 	uint64_t	nodeid;
    728 	uint64_t	offset;
    729 	uint32_t	size;
    730 	uint32_t	padding;
    731 };
    732 
    733 /* Matches the size of fuse_write_in */
    734 struct fuse_notify_retrieve_in {
    735 	uint64_t	dummy1;
    736 	uint64_t	offset;
    737 	uint32_t	size;
    738 	uint32_t	dummy2;
    739 	uint64_t	dummy3;
    740 	uint64_t	dummy4;
    741 };
    742 
    743 #endif /* _LINUX_FUSE_H */
    744