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
21 #include <asm/types.h>
22 #include <linux/major.h>
24 /** Version number of this interface */
25 #define FUSE_KERNEL_VERSION 7
27 /** Minor version number of this interface */
28 #define FUSE_KERNEL_MINOR_VERSION 9
30 /** The node ID of the root inode */
31 #define FUSE_ROOT_ID 1
33 /** The major number of the fuse character device */
34 #define FUSE_MAJOR MISC_MAJOR
36 /** The minor number of the fuse character device */
37 #define FUSE_MINOR 229
39 /* Make sure all structures are padded to 64bit boundary, so 32bit
40 userspace works under 64bit kernels */
74 struct fuse_file_lock {
82 * Bitmasks for fuse_setattr_in.valid
84 #define FATTR_MODE (1 << 0)
85 #define FATTR_UID (1 << 1)
86 #define FATTR_GID (1 << 2)
87 #define FATTR_SIZE (1 << 3)
88 #define FATTR_ATIME (1 << 4)
89 #define FATTR_MTIME (1 << 5)
90 #define FATTR_FH (1 << 6)
91 #define FATTR_ATIME_NOW (1 << 7)
92 #define FATTR_MTIME_NOW (1 << 8)
93 #define FATTR_LOCKOWNER (1 << 9)
96 * Flags returned by the OPEN request
98 * FOPEN_DIRECT_IO: bypass page cache for this open file
99 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
101 #define FOPEN_DIRECT_IO (1 << 0)
102 #define FOPEN_KEEP_CACHE (1 << 1)
105 * INIT request/reply flags
107 #define FUSE_ASYNC_READ (1 << 0)
108 #define FUSE_POSIX_LOCKS (1 << 1)
109 #define FUSE_FILE_OPS (1 << 2)
110 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
115 #define FUSE_RELEASE_FLUSH (1 << 0)
120 #define FUSE_GETATTR_FH (1 << 0)
125 #define FUSE_LK_FLOCK (1 << 0)
130 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
131 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
133 #define FUSE_WRITE_CACHE (1 << 0)
134 #define FUSE_WRITE_LOCKOWNER (1 << 1)
139 #define FUSE_READ_LOCKOWNER (1 << 1)
143 FUSE_FORGET = 2, /* no reply */
163 FUSE_REMOVEXATTR = 24,
168 FUSE_RELEASEDIR = 29,
180 /* The read buffer is required to be at least 8k, but may be much larger */
181 #define FUSE_MIN_READ_BUFFER 8192
183 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
185 struct fuse_entry_out {
186 __u64 nodeid; /* Inode ID */
187 __u64 generation; /* Inode generation: nodeid:gen must
188 be unique for the fs's lifetime */
189 __u64 entry_valid; /* Cache timeout for the name */
190 __u64 attr_valid; /* Cache timeout for the attributes */
191 __u32 entry_valid_nsec;
192 __u32 attr_valid_nsec;
193 struct fuse_attr attr;
196 struct fuse_forget_in {
200 struct fuse_getattr_in {
206 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
208 struct fuse_attr_out {
209 __u64 attr_valid; /* Cache timeout for the attributes */
210 __u32 attr_valid_nsec;
212 struct fuse_attr attr;
215 struct fuse_mknod_in {
220 struct fuse_mkdir_in {
225 struct fuse_rename_in {
229 struct fuse_link_in {
233 struct fuse_setattr_in {
252 struct fuse_open_in {
257 struct fuse_open_out {
263 struct fuse_release_in {
270 struct fuse_flush_in {
277 struct fuse_read_in {
285 #define FUSE_COMPAT_WRITE_IN_SIZE 24
287 struct fuse_write_in {
295 struct fuse_write_out {
300 #define FUSE_COMPAT_STATFS_SIZE 48
302 struct fuse_statfs_out {
303 struct fuse_kstatfs st;
306 struct fuse_fsync_in {
312 struct fuse_setxattr_in {
317 struct fuse_getxattr_in {
322 struct fuse_getxattr_out {
330 struct fuse_file_lock lk;
336 struct fuse_file_lock lk;
339 struct fuse_access_in {
344 struct fuse_init_in {
351 struct fuse_init_out {
360 struct fuse_interrupt_in {
364 struct fuse_bmap_in {
370 struct fuse_bmap_out {
374 struct fuse_in_header {
385 struct fuse_out_header {
399 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
400 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
401 #define FUSE_DIRENT_SIZE(d) \
402 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)