2 FUSE: Filesystem in Userspace
3 Copyright (C) 2001-2006 Miklos Szeredi <miklos@szeredi.hu>
5 This program can be distributed under the terms of the GNU GPL.
10 * This file defines the kernel interface of FUSE
15 * - new fuse_getattr_in input argument of GETATTR
16 * - add lk_flags in fuse_lk_in
17 * - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
18 * - add blksize field to fuse_attr
19 * - add file flags field to fuse_read_in and fuse_write_in
22 #include <asm/types.h>
23 #include <linux/major.h>
25 /** Version number of this interface */
26 #define FUSE_KERNEL_VERSION 7
28 /** Minor version number of this interface */
29 #define FUSE_KERNEL_MINOR_VERSION 9
31 /** The node ID of the root inode */
32 #define FUSE_ROOT_ID 1
34 /** The major number of the fuse character device */
35 #define FUSE_MAJOR MISC_MAJOR
37 /** The minor number of the fuse character device */
38 #define FUSE_MINOR 229
40 /* Make sure all structures are padded to 64bit boundary, so 32bit
41 userspace works under 64bit kernels */
75 struct fuse_file_lock
{
83 * Bitmasks for fuse_setattr_in.valid
85 #define FATTR_MODE (1 << 0)
86 #define FATTR_UID (1 << 1)
87 #define FATTR_GID (1 << 2)
88 #define FATTR_SIZE (1 << 3)
89 #define FATTR_ATIME (1 << 4)
90 #define FATTR_MTIME (1 << 5)
91 #define FATTR_FH (1 << 6)
92 #define FATTR_ATIME_NOW (1 << 7)
93 #define FATTR_MTIME_NOW (1 << 8)
94 #define FATTR_LOCKOWNER (1 << 9)
97 * Flags returned by the OPEN request
99 * FOPEN_DIRECT_IO: bypass page cache for this open file
100 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
102 #define FOPEN_DIRECT_IO (1 << 0)
103 #define FOPEN_KEEP_CACHE (1 << 1)
106 * INIT request/reply flags
108 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
110 #define FUSE_ASYNC_READ (1 << 0)
111 #define FUSE_POSIX_LOCKS (1 << 1)
112 #define FUSE_FILE_OPS (1 << 2)
113 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
114 #define FUSE_EXPORT_SUPPORT (1 << 4)
115 #define FUSE_BIG_WRITES (1 << 5)
120 #define FUSE_RELEASE_FLUSH (1 << 0)
125 #define FUSE_GETATTR_FH (1 << 0)
130 #define FUSE_LK_FLOCK (1 << 0)
135 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
136 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
138 #define FUSE_WRITE_CACHE (1 << 0)
139 #define FUSE_WRITE_LOCKOWNER (1 << 1)
144 #define FUSE_READ_LOCKOWNER (1 << 1)
148 FUSE_FORGET
= 2, /* no reply */
168 FUSE_REMOVEXATTR
= 24,
173 FUSE_RELEASEDIR
= 29,
185 /* The read buffer is required to be at least 8k, but may be much larger */
186 #define FUSE_MIN_READ_BUFFER 8192
188 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
190 struct fuse_entry_out
{
191 __u64 nodeid
; /* Inode ID */
192 __u64 generation
; /* Inode generation: nodeid:gen must
193 be unique for the fs's lifetime */
194 __u64 entry_valid
; /* Cache timeout for the name */
195 __u64 attr_valid
; /* Cache timeout for the attributes */
196 __u32 entry_valid_nsec
;
197 __u32 attr_valid_nsec
;
198 struct fuse_attr attr
;
201 struct fuse_forget_in
{
205 struct fuse_getattr_in
{
211 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
213 struct fuse_attr_out
{
214 __u64 attr_valid
; /* Cache timeout for the attributes */
215 __u32 attr_valid_nsec
;
217 struct fuse_attr attr
;
220 struct fuse_mknod_in
{
225 struct fuse_mkdir_in
{
230 struct fuse_rename_in
{
234 struct fuse_link_in
{
238 struct fuse_setattr_in
{
257 struct fuse_open_in
{
262 struct fuse_open_out
{
268 struct fuse_release_in
{
275 struct fuse_flush_in
{
282 struct fuse_read_in
{
292 #define FUSE_COMPAT_WRITE_IN_SIZE 24
294 struct fuse_write_in
{
304 struct fuse_write_out
{
309 #define FUSE_COMPAT_STATFS_SIZE 48
311 struct fuse_statfs_out
{
312 struct fuse_kstatfs st
;
315 struct fuse_fsync_in
{
321 struct fuse_setxattr_in
{
326 struct fuse_getxattr_in
{
331 struct fuse_getxattr_out
{
339 struct fuse_file_lock lk
;
345 struct fuse_file_lock lk
;
348 struct fuse_access_in
{
353 struct fuse_init_in
{
360 struct fuse_init_out
{
369 struct fuse_interrupt_in
{
373 struct fuse_bmap_in
{
379 struct fuse_bmap_out
{
383 struct fuse_in_header
{
394 struct fuse_out_header
{
408 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
409 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
410 #define FUSE_DIRENT_SIZE(d) \
411 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
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