/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
/*
This file defines the kernel interface of FUSE
Copyright ( C ) 2001 - 2008 Miklos Szeredi < miklos @ szeredi . hu >
This program can be distributed under the terms of the GNU GPL .
See the file COPYING .
This - - and only this - - header file may also be distributed under
the terms of the BSD Licence as follows :
Copyright ( C ) 2001 - 2007 Miklos Szeredi . All rights reserved .
Redistribution and use in source and binary forms , with or without
modification , are permitted provided that the following conditions
are met :
1 . Redistributions of source code must retain the above copyright
notice , this list of conditions and the following disclaimer .
2 . Redistributions in binary form must reproduce the above copyright
notice , this list of conditions and the following disclaimer in the
documentation and / or other materials provided with the distribution .
THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ` ` AS IS ' ' AND
ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT LIMITED TO , THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED . IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT , INDIRECT , INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL
DAMAGES ( INCLUDING , BUT NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES ; LOSS OF USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION )
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT
LIABILITY , OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE .
*/
/*
* This file defines the kernel interface of FUSE
*
* Protocol changelog :
*
* 7 . 1 :
* - add the following messages :
* FUSE_SETATTR , FUSE_SYMLINK , FUSE_MKNOD , FUSE_MKDIR , FUSE_UNLINK ,
* FUSE_RMDIR , FUSE_RENAME , FUSE_LINK , FUSE_OPEN , FUSE_READ , FUSE_WRITE ,
* FUSE_RELEASE , FUSE_FSYNC , FUSE_FLUSH , FUSE_SETXATTR , FUSE_GETXATTR ,
* FUSE_LISTXATTR , FUSE_REMOVEXATTR , FUSE_OPENDIR , FUSE_READDIR ,
* FUSE_RELEASEDIR
* - add padding to messages to accommodate 32 - bit servers on 64 - bit kernels
*
* 7 . 2 :
* - add FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE flags
* - add FUSE_FSYNCDIR message
*
* 7 . 3 :
* - add FUSE_ACCESS message
* - add FUSE_CREATE message
* - add filehandle to fuse_setattr_in
*
* 7 . 4 :
* - add frsize to fuse_kstatfs
* - clean up request size limit checking
*
* 7 . 5 :
* - add flags and max_write to fuse_init_out
*
* 7 . 6 :
* - add max_readahead to fuse_init_in and fuse_init_out
*
* 7 . 7 :
* - add FUSE_INTERRUPT message
* - add POSIX file lock support
*
* 7 . 8 :
* - add lock_owner and flags fields to fuse_release_in
* - add FUSE_BMAP message
* - add FUSE_DESTROY message
*
* 7 . 9 :
* - new fuse_getattr_in input argument of GETATTR
* - add lk_flags in fuse_lk_in
* - add lock_owner field to fuse_setattr_in , fuse_read_in and fuse_write_in
* - add blksize field to fuse_attr
* - add file flags field to fuse_read_in and fuse_write_in
* - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
*
* 7 . 10
* - add nonseekable open flag
*
* 7 . 11
* - add IOCTL message
* - add unsolicited notification support
* - add POLL message and NOTIFY_POLL notification
*
* 7 . 12
* - add umask flag to input argument of create , mknod and mkdir
* - add notification messages for invalidation of inodes and
* directory entries
*
* 7 . 13
* - make max number of background requests and congestion threshold
* tunables
*
* 7 . 14
* - add splice support to fuse device
*
* 7 . 15
* - add store notify
* - add retrieve notify
*
* 7 . 16
* - add BATCH_FORGET request
* - FUSE_IOCTL_UNRESTRICTED shall now return with array of ' struct
* fuse_ioctl_iovec ' instead of ambiguous ' struct iovec '
* - add FUSE_IOCTL_32BIT flag
*
* 7 . 17
* - add FUSE_FLOCK_LOCKS and FUSE_RELEASE_FLOCK_UNLOCK
*
* 7 . 18
* - add FUSE_IOCTL_DIR flag
* - add FUSE_NOTIFY_DELETE
*
* 7 . 19
* - add FUSE_FALLOCATE
*
* 7 . 20
* - add FUSE_AUTO_INVAL_DATA
*
* 7 . 21
* - add FUSE_READDIRPLUS
* - send the requested events in POLL request
*
* 7 . 22
* - add FUSE_ASYNC_DIO
*
* 7 . 23
* - add FUSE_WRITEBACK_CACHE
* - add time_gran to fuse_init_out
* - add reserved space to fuse_init_out
* - add FATTR_CTIME
* - add ctime and ctimensec to fuse_setattr_in
* - add FUSE_RENAME2 request
* - add FUSE_NO_OPEN_SUPPORT flag
*
* 7 . 24
* - add FUSE_LSEEK for SEEK_HOLE and SEEK_DATA support
*
* 7 . 25
* - add FUSE_PARALLEL_DIROPS
*
* 7 . 26
* - add FUSE_HANDLE_KILLPRIV
* - add FUSE_POSIX_ACL
*
* 7 . 27
* - add FUSE_ABORT_ERROR
*
* 7 . 28
* - add FUSE_COPY_FILE_RANGE
* - add FOPEN_CACHE_DIR
* - add FUSE_MAX_PAGES , add max_pages to init_out
* - add FUSE_CACHE_SYMLINKS
*
* 7 . 29
* - add FUSE_NO_OPENDIR_SUPPORT flag
*
* 7 . 30
* - add FUSE_EXPLICIT_INVAL_DATA
* - add FUSE_IOCTL_COMPAT_X32
*
* 7 . 31
* - add FUSE_WRITE_KILL_PRIV flag
* - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
* - add map_alignment to fuse_init_out , add FUSE_MAP_ALIGNMENT flag
*
* 7 . 32
* - add flags to fuse_attr , add FUSE_ATTR_SUBMOUNT , add FUSE_SUBMOUNTS
*
* 7 . 33
* - add FUSE_HANDLE_KILLPRIV_V2 , FUSE_WRITE_KILL_SUIDGID , FATTR_KILL_SUIDGID
* - add FUSE_OPEN_KILL_SUIDGID
* - extend fuse_setxattr_in , add FUSE_SETXATTR_EXT
* - add FUSE_SETXATTR_ACL_KILL_SGID
*
* 7 . 34
* - add FUSE_SYNCFS
*
* 7 . 35
* - add FOPEN_NOFLUSH
*
* 7 . 36
* - extend fuse_init_in with reserved fields , add FUSE_INIT_EXT init flag
* - add flags2 to fuse_init_in and fuse_init_out
* - add FUSE_SECURITY_CTX init flag
* - add security context to create , mkdir , symlink , and mknod requests
* - add FUSE_HAS_INODE_DAX , FUSE_ATTR_DAX
*
* 7 . 37
* - add FUSE_TMPFILE
*
* 7 . 38
* - add FUSE_EXPIRE_ONLY flag to fuse_notify_inval_entry
* - add FOPEN_PARALLEL_DIRECT_WRITES
* - add total_extlen to fuse_in_header
* - add FUSE_MAX_NR_SECCTX
* - add extension header
* - add FUSE_EXT_GROUPS
* - add FUSE_CREATE_SUPP_GROUP
* - add FUSE_HAS_EXPIRE_ONLY
*
* 7 . 39
* - add FUSE_DIRECT_IO_ALLOW_MMAP
* - add FUSE_STATX and related structures
*
* 7 . 40
* - add max_stack_depth to fuse_init_out , add FUSE_PASSTHROUGH init flag
* - add backing_id to fuse_open_out , add FOPEN_PASSTHROUGH open flag
* - add FUSE_NO_EXPORT_SUPPORT init flag
* - add FUSE_NOTIFY_RESEND , add FUSE_HAS_RESEND init flag
*
* 7 . 41
* - add FUSE_ALLOW_IDMAP
* 7 . 42
* - Add FUSE_OVER_IO_URING and all other io - uring related flags and data
* structures :
* - struct fuse_uring_ent_in_out
* - struct fuse_uring_req_header
* - struct fuse_uring_cmd_req
* - FUSE_URING_IN_OUT_HEADER_SZ
* - FUSE_URING_OP_IN_OUT_SZ
* - enum fuse_uring_cmd
*
* 7 . 43
* - add FUSE_REQUEST_TIMEOUT
*
* 7 . 44
* - add FUSE_NOTIFY_INC_EPOCH
*/
#ifndef _LINUX_FUSE_H
#define _LINUX_FUSE_H
#ifdef __KERNEL__
#include <linux/types.h>
#else
#include <stdint.h>
#endif
/*
* Version negotiation :
*
* Both the kernel and userspace send the version they support in the
* INIT request and reply respectively .
*
* If the major versions match then both shall use the smallest
* of the two minor versions for communication .
*
* If the kernel supports a larger major version , then userspace shall
* reply with the major version it supports , ignore the rest of the
* INIT message and expect a new INIT message from the kernel with a
* matching major version .
*
* If the library supports a larger major version , then it shall fall
* back to the major protocol version sent by the kernel for
* communication and reply with that major version ( and an arbitrary
* supported minor version ) .
*/
/** Version number of this interface */
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
#define FUSE_KERNEL_MINOR_VERSION 44
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
/* Make sure all structures are padded to 64bit boundary, so 32bit
userspace works under 64bit kernels */
struct fuse_attr {
uint64_t ino;
uint64_t size;
uint64_t blocks;
uint64_t atime;
uint64_t mtime;
uint64_t ctime;
uint32_t atimensec;
uint32_t mtimensec;
uint32_t ctimensec;
uint32_t mode;
uint32_t nlink;
uint32_t uid;
uint32_t gid;
uint32_t rdev;
uint32_t blksize;
uint32_t flags;
};
/*
* The following structures are bit - for - bit compatible with the statx ( 2 ) ABI in
* Linux .
*/
struct fuse_sx_time {
int64_t tv_sec;
uint32_t tv_nsec;
int32_t __reserved;
};
struct fuse_statx {
uint32_t mask;
uint32_t blksize;
uint64_t attributes;
uint32_t nlink;
uint32_t uid;
uint32_t gid;
uint16_t mode;
uint16_t __spare0[1 ];
uint64_t ino;
uint64_t size;
uint64_t blocks;
uint64_t attributes_mask;
struct fuse_sx_time atime;
struct fuse_sx_time btime;
struct fuse_sx_time ctime;
struct fuse_sx_time mtime;
uint32_t rdev_major;
uint32_t rdev_minor;
uint32_t dev_major;
uint32_t dev_minor;
uint64_t __spare2[14 ];
};
struct fuse_kstatfs {
uint64_t blocks;
uint64_t bfree;
uint64_t bavail;
uint64_t files;
uint64_t ffree;
uint32_t bsize;
uint32_t namelen;
uint32_t frsize;
uint32_t padding;
uint32_t spare[6 ];
};
struct fuse_file_lock {
uint64_t start;
uint64_t end;
uint32_t type;
uint32_t pid; /* tgid */
};
/**
* Bitmasks for fuse_setattr_in . valid
*/
#define FATTR_MODE (1 << 0 )
#define FATTR_UID (1 << 1 )
#define FATTR_GID (1 << 2 )
#define FATTR_SIZE (1 << 3 )
#define FATTR_ATIME (1 << 4 )
#define FATTR_MTIME (1 << 5 )
#define FATTR_FH (1 << 6 )
#define FATTR_ATIME_NOW (1 << 7 )
#define FATTR_MTIME_NOW (1 << 8 )
#define FATTR_LOCKOWNER (1 << 9 )
#define FATTR_CTIME (1 << 10 )
#define FATTR_KILL_SUIDGID (1 << 11 )
/**
* Flags returned by the OPEN request
*
* FOPEN_DIRECT_IO : bypass page cache for this open file
* FOPEN_KEEP_CACHE : don ' t invalidate the data cache on open
* FOPEN_NONSEEKABLE : the file is not seekable
* FOPEN_CACHE_DIR : allow caching this directory
* FOPEN_STREAM : the file is stream - like ( no file position at all )
* FOPEN_NOFLUSH : don ' t flush data cache on close ( unless FUSE_WRITEBACK_CACHE )
* FOPEN_PARALLEL_DIRECT_WRITES : Allow concurrent direct writes on the same inode
* FOPEN_PASSTHROUGH : passthrough read / write io for this open file
*/
#define FOPEN_DIRECT_IO (1 << 0 )
#define FOPEN_KEEP_CACHE (1 << 1 )
#define FOPEN_NONSEEKABLE (1 << 2 )
#define FOPEN_CACHE_DIR (1 << 3 )
#define FOPEN_STREAM (1 << 4 )
#define FOPEN_NOFLUSH (1 << 5 )
#define FOPEN_PARALLEL_DIRECT_WRITES (1 << 6 )
#define FOPEN_PASSTHROUGH (1 << 7 )
/**
* INIT request / reply flags
*
* FUSE_ASYNC_READ : asynchronous read requests
* FUSE_POSIX_LOCKS : remote locking for POSIX file locks
* FUSE_FILE_OPS : kernel sends file handle for fstat , etc . . . ( not yet supported )
* FUSE_ATOMIC_O_TRUNC : handles the O_TRUNC open flag in the filesystem
* FUSE_EXPORT_SUPPORT : filesystem handles lookups of " . " and " . . "
* FUSE_BIG_WRITES : filesystem can handle write size larger than 4 kB
* FUSE_DONT_MASK : don ' t apply umask to file mode on create operations
* FUSE_SPLICE_WRITE : kernel supports splice write on the device
* FUSE_SPLICE_MOVE : kernel supports splice move on the device
* FUSE_SPLICE_READ : kernel supports splice read on the device
* FUSE_FLOCK_LOCKS : remote locking for BSD style file locks
* FUSE_HAS_IOCTL_DIR : kernel supports ioctl on directories
* FUSE_AUTO_INVAL_DATA : automatically invalidate cached pages
* FUSE_DO_READDIRPLUS : do READDIRPLUS ( READDIR + LOOKUP in one )
* FUSE_READDIRPLUS_AUTO : adaptive readdirplus
* FUSE_ASYNC_DIO : asynchronous direct I / O submission
* FUSE_WRITEBACK_CACHE : use writeback cache for buffered writes
* FUSE_NO_OPEN_SUPPORT : kernel supports zero - message opens
* FUSE_PARALLEL_DIROPS : allow parallel lookups and readdir
* FUSE_HANDLE_KILLPRIV : fs handles killing suid / sgid / cap on write / chown / trunc
* FUSE_POSIX_ACL : filesystem supports posix acls
* FUSE_ABORT_ERROR : reading the device after abort returns ECONNABORTED
* FUSE_MAX_PAGES : init_out . max_pages contains the max number of req pages
* FUSE_CACHE_SYMLINKS : cache READLINK responses
* FUSE_NO_OPENDIR_SUPPORT : kernel supports zero - message opendir
* FUSE_EXPLICIT_INVAL_DATA : only invalidate cached pages on explicit request
* FUSE_MAP_ALIGNMENT : init_out . map_alignment contains log2 ( byte alignment ) for
* foffset and moffset fields in struct
* fuse_setupmapping_out and fuse_removemapping_one .
* FUSE_SUBMOUNTS : kernel supports auto - mounting directory submounts
* FUSE_HANDLE_KILLPRIV_V2 : fs kills suid / sgid / cap on write / chown / trunc .
* Upon write / truncate suid / sgid is only killed if caller
* does not have CAP_FSETID . Additionally upon
* write / truncate sgid is killed only if file has group
* execute permission . ( Same as Linux VFS behavior ) .
* FUSE_SETXATTR_EXT : Server supports extended struct fuse_setxattr_in
* FUSE_INIT_EXT : extended fuse_init_in request
* FUSE_INIT_RESERVED : reserved , do not use
* FUSE_SECURITY_CTX : add security context to create , mkdir , symlink , and
* mknod
* FUSE_HAS_INODE_DAX : use per inode DAX
* FUSE_CREATE_SUPP_GROUP : add supplementary group info to create , mkdir ,
* symlink and mknod ( single group that matches parent )
* FUSE_HAS_EXPIRE_ONLY : kernel supports expiry - only entry invalidation
* FUSE_DIRECT_IO_ALLOW_MMAP : allow shared mmap in FOPEN_DIRECT_IO mode .
* FUSE_NO_EXPORT_SUPPORT : explicitly disable export support
* FUSE_HAS_RESEND : kernel supports resending pending requests , and the high bit
* of the request ID indicates resend requests
* FUSE_ALLOW_IDMAP : allow creation of idmapped mounts
* FUSE_OVER_IO_URING : Indicate that client supports io - uring
* FUSE_REQUEST_TIMEOUT : kernel supports timing out requests .
* init_out . request_timeout contains the timeout ( in secs )
*/
#define FUSE_ASYNC_READ (1 << 0 )
#define FUSE_POSIX_LOCKS (1 << 1 )
#define FUSE_FILE_OPS (1 << 2 )
#define FUSE_ATOMIC_O_TRUNC (1 << 3 )
#define FUSE_EXPORT_SUPPORT (1 << 4 )
#define FUSE_BIG_WRITES (1 << 5 )
#define FUSE_DONT_MASK (1 << 6 )
#define FUSE_SPLICE_WRITE (1 << 7 )
#define FUSE_SPLICE_MOVE (1 << 8 )
#define FUSE_SPLICE_READ (1 << 9 )
#define FUSE_FLOCK_LOCKS (1 << 10 )
#define FUSE_HAS_IOCTL_DIR (1 << 11 )
#define FUSE_AUTO_INVAL_DATA (1 << 12 )
#define FUSE_DO_READDIRPLUS (1 << 13 )
#define FUSE_READDIRPLUS_AUTO (1 << 14 )
#define FUSE_ASYNC_DIO (1 << 15 )
#define FUSE_WRITEBACK_CACHE (1 << 16 )
#define FUSE_NO_OPEN_SUPPORT (1 << 17 )
#define FUSE_PARALLEL_DIROPS (1 << 18 )
#define FUSE_HANDLE_KILLPRIV (1 << 19 )
#define FUSE_POSIX_ACL (1 << 20 )
#define FUSE_ABORT_ERROR (1 << 21 )
#define FUSE_MAX_PAGES (1 << 22 )
#define FUSE_CACHE_SYMLINKS (1 << 23 )
#define FUSE_NO_OPENDIR_SUPPORT (1 << 24 )
#define FUSE_EXPLICIT_INVAL_DATA (1 << 25 )
#define FUSE_MAP_ALIGNMENT (1 << 26 )
#define FUSE_SUBMOUNTS (1 << 27 )
#define FUSE_HANDLE_KILLPRIV_V2 (1 << 28 )
#define FUSE_SETXATTR_EXT (1 << 29 )
#define FUSE_INIT_EXT (1 << 30 )
#define FUSE_INIT_RESERVED (1 << 31 )
/* bits 32..63 get shifted down 32 bits into the flags2 field */
#define FUSE_SECURITY_CTX (1 ULL << 32 )
#define FUSE_HAS_INODE_DAX (1 ULL << 33 )
#define FUSE_CREATE_SUPP_GROUP (1 ULL << 34 )
#define FUSE_HAS_EXPIRE_ONLY (1 ULL << 35 )
#define FUSE_DIRECT_IO_ALLOW_MMAP (1 ULL << 36 )
#define FUSE_PASSTHROUGH (1 ULL << 37 )
#define FUSE_NO_EXPORT_SUPPORT (1 ULL << 38 )
#define FUSE_HAS_RESEND (1 ULL << 39 )
/* Obsolete alias for FUSE_DIRECT_IO_ALLOW_MMAP */
#define FUSE_DIRECT_IO_RELAX FUSE_DIRECT_IO_ALLOW_MMAP
#define FUSE_ALLOW_IDMAP (1 ULL << 40 )
#define FUSE_OVER_IO_URING (1 ULL << 41 )
#define FUSE_REQUEST_TIMEOUT (1 ULL << 42 )
/**
* CUSE INIT request / reply flags
*
* CUSE_UNRESTRICTED_IOCTL : use unrestricted ioctl
*/
#define CUSE_UNRESTRICTED_IOCTL (1 << 0 )
/**
* Release flags
*/
#define FUSE_RELEASE_FLUSH (1 << 0 )
#define FUSE_RELEASE_FLOCK_UNLOCK (1 << 1 )
/**
* Getattr flags
*/
#define FUSE_GETATTR_FH (1 << 0 )
/**
* Lock flags
*/
#define FUSE_LK_FLOCK (1 << 0 )
/**
* WRITE flags
*
* FUSE_WRITE_CACHE : delayed write from page cache , file handle is guessed
* FUSE_WRITE_LOCKOWNER : lock_owner field is valid
* FUSE_WRITE_KILL_SUIDGID : kill suid and sgid bits
*/
#define FUSE_WRITE_CACHE (1 << 0 )
#define FUSE_WRITE_LOCKOWNER (1 << 1 )
#define FUSE_WRITE_KILL_SUIDGID (1 << 2 )
/* Obsolete alias; this flag implies killing suid/sgid only. */
#define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID
/**
* Read flags
*/
#define FUSE_READ_LOCKOWNER (1 << 1 )
/**
* Ioctl flags
*
* FUSE_IOCTL_COMPAT : 32 bit compat ioctl on 64 bit machine
* FUSE_IOCTL_UNRESTRICTED : not restricted to well - formed ioctls , retry allowed
* FUSE_IOCTL_RETRY : retry with new iovecs
* FUSE_IOCTL_32BIT : 32 bit ioctl
* FUSE_IOCTL_DIR : is a directory
* FUSE_IOCTL_COMPAT_X32 : x32 compat ioctl on 64 bit machine ( 64 bit time_t )
*
* FUSE_IOCTL_MAX_IOV : maximum of in_iovecs + out_iovecs
*/
#define FUSE_IOCTL_COMPAT (1 << 0 )
#define FUSE_IOCTL_UNRESTRICTED (1 << 1 )
#define FUSE_IOCTL_RETRY (1 << 2 )
#define FUSE_IOCTL_32BIT (1 << 3 )
#define FUSE_IOCTL_DIR (1 << 4 )
#define FUSE_IOCTL_COMPAT_X32 (1 << 5 )
#define FUSE_IOCTL_MAX_IOV 256
/**
* Poll flags
*
* FUSE_POLL_SCHEDULE_NOTIFY : request poll notify
*/
#define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0 )
/**
* Fsync flags
*
* FUSE_FSYNC_FDATASYNC : Sync data only , not metadata
*/
#define FUSE_FSYNC_FDATASYNC (1 << 0 )
/**
* fuse_attr flags
*
* FUSE_ATTR_SUBMOUNT : Object is a submount root
* FUSE_ATTR_DAX : Enable DAX for this file in per inode DAX mode
*/
#define FUSE_ATTR_SUBMOUNT (1 << 0 )
#define FUSE_ATTR_DAX (1 << 1 )
/**
* Open flags
* FUSE_OPEN_KILL_SUIDGID : Kill suid and sgid if executable
*/
#define FUSE_OPEN_KILL_SUIDGID (1 << 0 )
/**
* setxattr flags
* FUSE_SETXATTR_ACL_KILL_SGID : Clear SGID when system . posix_acl_access is set
*/
#define FUSE_SETXATTR_ACL_KILL_SGID (1 << 0 )
/**
* notify_inval_entry flags
* FUSE_EXPIRE_ONLY
*/
#define FUSE_EXPIRE_ONLY (1 << 0 )
/**
* extension type
* FUSE_MAX_NR_SECCTX : maximum value of & fuse_secctx_header . nr_secctx
* FUSE_EXT_GROUPS : & fuse_supp_groups extension
*/
enum fuse_ext_type {
/* Types 0..31 are reserved for fuse_secctx_header */
FUSE_MAX_NR_SECCTX = 31 ,
FUSE_EXT_GROUPS = 32 ,
};
enum fuse_opcode {
FUSE_LOOKUP = 1 ,
FUSE_FORGET = 2 , /* no reply */
FUSE_GETATTR = 3 ,
FUSE_SETATTR = 4 ,
FUSE_READLINK = 5 ,
FUSE_SYMLINK = 6 ,
FUSE_MKNOD = 8 ,
FUSE_MKDIR = 9 ,
FUSE_UNLINK = 10 ,
FUSE_RMDIR = 11 ,
FUSE_RENAME = 12 ,
FUSE_LINK = 13 ,
FUSE_OPEN = 14 ,
FUSE_READ = 15 ,
FUSE_WRITE = 16 ,
FUSE_STATFS = 17 ,
FUSE_RELEASE = 18 ,
FUSE_FSYNC = 20 ,
FUSE_SETXATTR = 21 ,
FUSE_GETXATTR = 22 ,
FUSE_LISTXATTR = 23 ,
FUSE_REMOVEXATTR = 24 ,
FUSE_FLUSH = 25 ,
FUSE_INIT = 26 ,
FUSE_OPENDIR = 27 ,
FUSE_READDIR = 28 ,
FUSE_RELEASEDIR = 29 ,
FUSE_FSYNCDIR = 30 ,
FUSE_GETLK = 31 ,
FUSE_SETLK = 32 ,
FUSE_SETLKW = 33 ,
FUSE_ACCESS = 34 ,
FUSE_CREATE = 35 ,
FUSE_INTERRUPT = 36 ,
FUSE_BMAP = 37 ,
FUSE_DESTROY = 38 ,
FUSE_IOCTL = 39 ,
FUSE_POLL = 40 ,
FUSE_NOTIFY_REPLY = 41 ,
FUSE_BATCH_FORGET = 42 ,
FUSE_FALLOCATE = 43 ,
FUSE_READDIRPLUS = 44 ,
FUSE_RENAME2 = 45 ,
FUSE_LSEEK = 46 ,
FUSE_COPY_FILE_RANGE = 47 ,
FUSE_SETUPMAPPING = 48 ,
FUSE_REMOVEMAPPING = 49 ,
FUSE_SYNCFS = 50 ,
FUSE_TMPFILE = 51 ,
FUSE_STATX = 52 ,
/* CUSE specific operations */
CUSE_INIT = 4096 ,
/* Reserved opcodes: helpful to detect structure endian-ness */
CUSE_INIT_BSWAP_RESERVED = 1048576 , /* CUSE_INIT << 8 */
FUSE_INIT_BSWAP_RESERVED = 436207616 , /* FUSE_INIT << 24 */
};
enum fuse_notify_code {
FUSE_NOTIFY_POLL = 1 ,
FUSE_NOTIFY_INVAL_INODE = 2 ,
FUSE_NOTIFY_INVAL_ENTRY = 3 ,
FUSE_NOTIFY_STORE = 4 ,
FUSE_NOTIFY_RETRIEVE = 5 ,
FUSE_NOTIFY_DELETE = 6 ,
FUSE_NOTIFY_RESEND = 7 ,
FUSE_NOTIFY_INC_EPOCH = 8 ,
FUSE_NOTIFY_CODE_MAX,
};
/* The read buffer is required to be at least 8k, but may be much larger */
#define FUSE_MIN_READ_BUFFER 8192
#define FUSE_COMPAT_ENTRY_OUT_SIZE 120
struct fuse_entry_out {
uint64_t nodeid; /* Inode ID */
uint64_t generation; /* Inode generation: nodeid:gen must
be unique for the fs's lifetime */
uint64_t entry_valid; /* Cache timeout for the name */
uint64_t attr_valid; /* Cache timeout for the attributes */
uint32_t entry_valid_nsec;
uint32_t attr_valid_nsec;
struct fuse_attr attr;
};
struct fuse_forget_in {
uint64_t nlookup;
};
struct fuse_forget_one {
uint64_t nodeid;
uint64_t nlookup;
};
struct fuse_batch_forget_in {
uint32_t count;
uint32_t dummy;
};
struct fuse_getattr_in {
uint32_t getattr_flags;
uint32_t dummy;
uint64_t fh;
};
#define FUSE_COMPAT_ATTR_OUT_SIZE 96
struct fuse_attr_out {
uint64_t attr_valid; /* Cache timeout for the attributes */
uint32_t attr_valid_nsec;
uint32_t dummy;
struct fuse_attr attr;
};
struct fuse_statx_in {
uint32_t getattr_flags;
uint32_t reserved;
uint64_t fh;
uint32_t sx_flags;
uint32_t sx_mask;
};
struct fuse_statx_out {
uint64_t attr_valid; /* Cache timeout for the attributes */
uint32_t attr_valid_nsec;
uint32_t flags;
uint64_t spare[2 ];
struct fuse_statx stat;
};
#define FUSE_COMPAT_MKNOD_IN_SIZE 8
struct fuse_mknod_in {
uint32_t mode;
uint32_t rdev;
uint32_t umask;
uint32_t padding;
};
struct fuse_mkdir_in {
uint32_t mode;
uint32_t umask;
};
struct fuse_rename_in {
uint64_t newdir;
};
struct fuse_rename2_in {
uint64_t newdir;
uint32_t flags;
uint32_t padding;
};
struct fuse_link_in {
uint64_t oldnodeid;
};
struct fuse_setattr_in {
uint32_t valid;
uint32_t padding;
uint64_t fh;
uint64_t size;
uint64_t lock_owner;
uint64_t atime;
uint64_t mtime;
uint64_t ctime;
uint32_t atimensec;
uint32_t mtimensec;
uint32_t ctimensec;
uint32_t mode;
uint32_t unused4;
uint32_t uid;
uint32_t gid;
uint32_t unused5;
};
struct fuse_open_in {
uint32_t flags;
uint32_t open_flags; /* FUSE_OPEN_... */
};
struct fuse_create_in {
uint32_t flags;
uint32_t mode;
uint32_t umask;
uint32_t open_flags; /* FUSE_OPEN_... */
};
struct fuse_open_out {
uint64_t fh;
uint32_t open_flags;
int32_t backing_id;
};
struct fuse_release_in {
uint64_t fh;
uint32_t flags;
uint32_t release_flags;
uint64_t lock_owner;
};
struct fuse_flush_in {
uint64_t fh;
uint32_t unused;
uint32_t padding;
uint64_t lock_owner;
};
struct fuse_read_in {
uint64_t fh;
uint64_t offset;
uint32_t size;
uint32_t read_flags;
uint64_t lock_owner;
uint32_t flags;
uint32_t padding;
};
#define FUSE_COMPAT_WRITE_IN_SIZE 24
struct fuse_write_in {
uint64_t fh;
uint64_t offset;
uint32_t size;
uint32_t write_flags;
uint64_t lock_owner;
uint32_t flags;
uint32_t padding;
};
struct fuse_write_out {
uint32_t size;
uint32_t padding;
};
#define FUSE_COMPAT_STATFS_SIZE 48
struct fuse_statfs_out {
struct fuse_kstatfs st;
};
struct fuse_fsync_in {
uint64_t fh;
uint32_t fsync_flags;
uint32_t padding;
};
#define FUSE_COMPAT_SETXATTR_IN_SIZE 8
struct fuse_setxattr_in {
uint32_t size;
uint32_t flags;
uint32_t setxattr_flags;
uint32_t padding;
};
struct fuse_getxattr_in {
uint32_t size;
uint32_t padding;
};
struct fuse_getxattr_out {
uint32_t size;
uint32_t padding;
};
struct fuse_lk_in {
uint64_t fh;
uint64_t owner;
struct fuse_file_lock lk;
uint32_t lk_flags;
uint32_t padding;
};
struct fuse_lk_out {
struct fuse_file_lock lk;
};
struct fuse_access_in {
uint32_t mask;
uint32_t padding;
};
struct fuse_init_in {
uint32_t major;
uint32_t minor;
uint32_t max_readahead;
uint32_t flags;
uint32_t flags2;
uint32_t unused[11 ];
};
#define FUSE_COMPAT_INIT_OUT_SIZE 8
#define FUSE_COMPAT_22_INIT_OUT_SIZE 24
struct fuse_init_out {
uint32_t major;
uint32_t minor;
uint32_t max_readahead;
uint32_t flags;
uint16_t max_background;
uint16_t congestion_threshold;
uint32_t max_write;
uint32_t time_gran;
uint16_t max_pages;
uint16_t map_alignment;
uint32_t flags2;
uint32_t max_stack_depth;
uint16_t request_timeout;
uint16_t unused[11 ];
};
#define CUSE_INIT_INFO_MAX 4096
struct cuse_init_in {
uint32_t major;
uint32_t minor;
uint32_t unused;
uint32_t flags;
};
struct cuse_init_out {
uint32_t major;
uint32_t minor;
uint32_t unused;
uint32_t flags;
uint32_t max_read;
uint32_t max_write;
uint32_t dev_major; /* chardev major */
uint32_t dev_minor; /* chardev minor */
uint32_t spare[10 ];
};
struct fuse_interrupt_in {
uint64_t unique;
};
struct fuse_bmap_in {
uint64_t block;
uint32_t blocksize;
uint32_t padding;
};
struct fuse_bmap_out {
uint64_t block;
};
struct fuse_ioctl_in {
uint64_t fh;
uint32_t flags;
uint32_t cmd;
uint64_t arg;
uint32_t in_size;
uint32_t out_size;
};
struct fuse_ioctl_iovec {
uint64_t base;
uint64_t len;
};
struct fuse_ioctl_out {
int32_t result;
uint32_t flags;
uint32_t in_iovs;
uint32_t out_iovs;
};
struct fuse_poll_in {
uint64_t fh;
uint64_t kh;
uint32_t flags;
uint32_t events;
};
struct fuse_poll_out {
uint32_t revents;
uint32_t padding;
};
struct fuse_notify_poll_wakeup_out {
uint64_t kh;
};
struct fuse_fallocate_in {
uint64_t fh;
uint64_t offset;
uint64_t length;
uint32_t mode;
uint32_t padding;
};
/**
* FUSE request unique ID flag
*
* Indicates whether this is a resend request . The receiver should handle this
* request accordingly .
*/
#define FUSE_UNIQUE_RESEND (1 ULL << 63 )
/**
* This value will be set by the kernel to
* ( struct fuse_in_header ) . { uid , gid } fields in
* case when :
* - fuse daemon enabled FUSE_ALLOW_IDMAP
* - idmapping information is not available and uid / gid
* can not be mapped in accordance with an idmapping .
*
* Note : an idmapping information always available
* for inode creation operations like :
* FUSE_MKNOD , FUSE_SYMLINK , FUSE_MKDIR , FUSE_TMPFILE ,
* FUSE_CREATE and FUSE_RENAME2 ( with RENAME_WHITEOUT ) .
*/
#define FUSE_INVALID_UIDGID ((uint32_t)(-1 ))
struct fuse_in_header {
uint32_t len;
uint32_t opcode;
uint64_t unique;
uint64_t nodeid;
uint32_t uid;
uint32_t gid;
uint32_t pid;
uint16_t total_extlen; /* length of extensions in 8byte units */
uint16_t padding;
};
struct fuse_out_header {
uint32_t len;
int32_t error;
uint64_t unique;
};
struct fuse_dirent {
uint64_t ino;
uint64_t off;
uint32_t namelen;
uint32_t type;
char name[];
};
/* Align variable length records to 64bit boundary */
#define FUSE_REC_ALIGN(x) \
(((x) + sizeof (uint64_t) - 1 ) & ~(sizeof (uint64_t) - 1 ))
#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
#define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x)
#define FUSE_DIRENT_SIZE(d) \
FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
struct fuse_direntplus {
struct fuse_entry_out entry_out;
struct fuse_dirent dirent;
};
#define FUSE_NAME_OFFSET_DIRENTPLUS \
offsetof(struct fuse_direntplus, dirent.name)
#define FUSE_DIRENTPLUS_SIZE(d) \
FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET_DIRENTPLUS + (d)->dirent.namelen)
struct fuse_notify_inval_inode_out {
uint64_t ino;
int64_t off;
int64_t len;
};
struct fuse_notify_inval_entry_out {
uint64_t parent;
uint32_t namelen;
uint32_t flags;
};
struct fuse_notify_delete_out {
uint64_t parent;
uint64_t child;
uint32_t namelen;
uint32_t padding;
};
struct fuse_notify_store_out {
uint64_t nodeid;
uint64_t offset;
uint32_t size;
uint32_t padding;
};
struct fuse_notify_retrieve_out {
uint64_t notify_unique;
uint64_t nodeid;
uint64_t offset;
uint32_t size;
uint32_t padding;
};
/* Matches the size of fuse_write_in */
struct fuse_notify_retrieve_in {
uint64_t dummy1;
uint64_t offset;
uint32_t size;
uint32_t dummy2;
uint64_t dummy3;
uint64_t dummy4;
};
struct fuse_backing_map {
int32_t fd;
uint32_t flags;
uint64_t padding;
};
/* Device ioctls: */
#define FUSE_DEV_IOC_MAGIC 229
#define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0 , uint32_t)
#define FUSE_DEV_IOC_BACKING_OPEN _IOW(FUSE_DEV_IOC_MAGIC, 1 , \
struct fuse_backing_map)
#define FUSE_DEV_IOC_BACKING_CLOSE _IOW(FUSE_DEV_IOC_MAGIC, 2 , uint32_t)
struct fuse_lseek_in {
uint64_t fh;
uint64_t offset;
uint32_t whence;
uint32_t padding;
};
struct fuse_lseek_out {
uint64_t offset;
};
struct fuse_copy_file_range_in {
uint64_t fh_in;
uint64_t off_in;
uint64_t nodeid_out;
uint64_t fh_out;
uint64_t off_out;
uint64_t len;
uint64_t flags;
};
#define FUSE_SETUPMAPPING_FLAG_WRITE (1 ull << 0 )
#define FUSE_SETUPMAPPING_FLAG_READ (1 ull << 1 )
struct fuse_setupmapping_in {
/* An already open handle */
uint64_t fh;
/* Offset into the file to start the mapping */
uint64_t foffset;
/* Length of mapping required */
uint64_t len;
/* Flags, FUSE_SETUPMAPPING_FLAG_* */
uint64_t flags;
/* Offset in Memory Window */
uint64_t moffset;
};
struct fuse_removemapping_in {
/* number of fuse_removemapping_one follows */
uint32_t count;
};
struct fuse_removemapping_one {
/* Offset into the dax window start the unmapping */
uint64_t moffset;
/* Length of mapping required */
uint64_t len;
};
#define FUSE_REMOVEMAPPING_MAX_ENTRY \
(PAGE_SIZE / sizeof (struct fuse_removemapping_one))
struct fuse_syncfs_in {
uint64_t padding;
};
/*
* For each security context , send fuse_secctx with size of security context
* fuse_secctx will be followed by security context name and this in turn
* will be followed by actual context label .
* fuse_secctx , name , context
*/
struct fuse_secctx {
uint32_t size;
uint32_t padding;
};
/*
* Contains the information about how many fuse_secctx structures are being
* sent and what ' s the total size of all security contexts ( including
* size of fuse_secctx_header ) .
*
*/
struct fuse_secctx_header {
uint32_t size;
uint32_t nr_secctx;
};
/**
* struct fuse_ext_header - extension header
* @ size : total size of this extension including this header
* @ type : type of extension
*
* This is made compatible with fuse_secctx_header by using type values >
* FUSE_MAX_NR_SECCTX
*/
struct fuse_ext_header {
uint32_t size;
uint32_t type;
};
/**
* struct fuse_supp_groups - Supplementary group extension
* @ nr_groups : number of supplementary groups
* @ groups : flexible array of group IDs
*/
struct fuse_supp_groups {
uint32_t nr_groups;
uint32_t groups[];
};
/**
* Size of the ring buffer header
*/
#define FUSE_URING_IN_OUT_HEADER_SZ 128
#define FUSE_URING_OP_IN_OUT_SZ 128
/* Used as part of the fuse_uring_req_header */
struct fuse_uring_ent_in_out {
uint64_t flags;
/*
* commit ID to be used in a reply to a ring request ( see also
* struct fuse_uring_cmd_req )
*/
uint64_t commit_id;
/* size of user payload buffer */
uint32_t payload_sz;
uint32_t padding;
uint64_t reserved;
};
/**
* Header for all fuse - io - uring requests
*/
struct fuse_uring_req_header {
/* struct fuse_in_header / struct fuse_out_header */
char in_out[FUSE_URING_IN_OUT_HEADER_SZ];
/* per op code header */
char op_in[FUSE_URING_OP_IN_OUT_SZ];
struct fuse_uring_ent_in_out ring_ent_in_out;
};
/**
* sqe commands to the kernel
*/
enum fuse_uring_cmd {
FUSE_IO_URING_CMD_INVALID = 0 ,
/* register the request buffer and fetch a fuse request */
FUSE_IO_URING_CMD_REGISTER = 1 ,
/* commit fuse request result and fetch next request */
FUSE_IO_URING_CMD_COMMIT_AND_FETCH = 2 ,
};
/**
* In the 80 B command area of the SQE .
*/
struct fuse_uring_cmd_req {
uint64_t flags;
/* entry identifier for commits */
uint64_t commit_id;
/* queue the command is for (queue index) */
uint16_t qid;
uint8_t padding[6 ];
};
#endif /* _LINUX_FUSE_H */
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