2 FUSE: Filesystem in Userspace
3 Copyright (C) 2001-2005 Miklos Szeredi <miklos@szeredi.hu>
5 This program can be distributed under the terms of the GNU GPL.
9 /* This file defines the kernel interface of FUSE */
11 #include <asm/types.h>
12 #include <linux/major.h>
14 /** Version number of this interface */
15 #define FUSE_KERNEL_VERSION 7
17 /** Minor version number of this interface */
18 #define FUSE_KERNEL_MINOR_VERSION 6
20 /** The node ID of the root inode */
21 #define FUSE_ROOT_ID 1
23 /** The major number of the fuse character device */
24 #define FUSE_MAJOR MISC_MAJOR
26 /** The minor number of the fuse character device */
27 #define FUSE_MINOR 229
29 /* Make sure all structures are padded to 64bit boundary, so 32bit
30 userspace works under 64bit kernels */
63 * Bitmasks for fuse_setattr_in.valid
65 #define FATTR_MODE (1 << 0)
66 #define FATTR_UID (1 << 1)
67 #define FATTR_GID (1 << 2)
68 #define FATTR_SIZE (1 << 3)
69 #define FATTR_ATIME (1 << 4)
70 #define FATTR_MTIME (1 << 5)
71 #define FATTR_FH (1 << 6)
74 * Flags returned by the OPEN request
76 * FOPEN_DIRECT_IO: bypass page cache for this open file
77 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
79 #define FOPEN_DIRECT_IO (1 << 0)
80 #define FOPEN_KEEP_CACHE (1 << 1)
83 * INIT request/reply flags
85 #define FUSE_ASYNC_READ (1 << 0)
89 FUSE_FORGET = 2, /* no reply */
109 FUSE_REMOVEXATTR = 24,
114 FUSE_RELEASEDIR = 29,
120 /* The read buffer is required to be at least 8k, but may be much larger */
121 #define FUSE_MIN_READ_BUFFER 8192
123 struct fuse_entry_out {
124 __u64 nodeid; /* Inode ID */
125 __u64 generation; /* Inode generation: nodeid:gen must
126 be unique for the fs's lifetime */
127 __u64 entry_valid; /* Cache timeout for the name */
128 __u64 attr_valid; /* Cache timeout for the attributes */
129 __u32 entry_valid_nsec;
130 __u32 attr_valid_nsec;
131 struct fuse_attr attr;
134 struct fuse_forget_in {
138 struct fuse_attr_out {
139 __u64 attr_valid; /* Cache timeout for the attributes */
140 __u32 attr_valid_nsec;
142 struct fuse_attr attr;
145 struct fuse_mknod_in {
150 struct fuse_mkdir_in {
155 struct fuse_rename_in {
159 struct fuse_link_in {
163 struct fuse_setattr_in {
182 struct fuse_open_in {
187 struct fuse_open_out {
193 struct fuse_release_in {
199 struct fuse_flush_in {
205 struct fuse_read_in {
212 struct fuse_write_in {
219 struct fuse_write_out {
224 #define FUSE_COMPAT_STATFS_SIZE 48
226 struct fuse_statfs_out {
227 struct fuse_kstatfs st;
230 struct fuse_fsync_in {
236 struct fuse_setxattr_in {
241 struct fuse_getxattr_in {
246 struct fuse_getxattr_out {
251 struct fuse_access_in {
256 struct fuse_init_in {
263 struct fuse_init_out {
272 struct fuse_in_header {
283 struct fuse_out_header {
297 #define FUSE_NAME_OFFSET ((unsigned) ((struct fuse_dirent *) 0)->name)
298 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
299 #define FUSE_DIRENT_SIZE(d) \
300 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)