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
19 #include <asm/types.h>
20 #include <linux/major.h>
22 /** Version number of this interface */
23 #define FUSE_KERNEL_VERSION 7
25 /** Minor version number of this interface */
26 #define FUSE_KERNEL_MINOR_VERSION 9
28 /** The node ID of the root inode */
29 #define FUSE_ROOT_ID 1
31 /** The major number of the fuse character device */
32 #define FUSE_MAJOR MISC_MAJOR
34 /** The minor number of the fuse character device */
35 #define FUSE_MINOR 229
37 /* Make sure all structures are padded to 64bit boundary, so 32bit
38 userspace works under 64bit kernels */
70 struct fuse_file_lock {
78 * Bitmasks for fuse_setattr_in.valid
80 #define FATTR_MODE (1 << 0)
81 #define FATTR_UID (1 << 1)
82 #define FATTR_GID (1 << 2)
83 #define FATTR_SIZE (1 << 3)
84 #define FATTR_ATIME (1 << 4)
85 #define FATTR_MTIME (1 << 5)
86 #define FATTR_FH (1 << 6)
87 #define FATTR_ATIME_NOW (1 << 7)
88 #define FATTR_MTIME_NOW (1 << 8)
91 * Flags returned by the OPEN request
93 * FOPEN_DIRECT_IO: bypass page cache for this open file
94 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
96 #define FOPEN_DIRECT_IO (1 << 0)
97 #define FOPEN_KEEP_CACHE (1 << 1)
100 * INIT request/reply flags
102 #define FUSE_ASYNC_READ (1 << 0)
103 #define FUSE_POSIX_LOCKS (1 << 1)
104 #define FUSE_FILE_OPS (1 << 2)
105 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
110 #define FUSE_RELEASE_FLUSH (1 << 0)
115 #define FUSE_GETATTR_FH (1 << 0)
120 #define FUSE_LK_FLOCK (1 << 0)
125 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
127 #define FUSE_WRITE_CACHE (1 << 0)
131 FUSE_FORGET = 2, /* no reply */
151 FUSE_REMOVEXATTR = 24,
156 FUSE_RELEASEDIR = 29,
168 /* The read buffer is required to be at least 8k, but may be much larger */
169 #define FUSE_MIN_READ_BUFFER 8192
171 struct fuse_entry_out {
172 __u64 nodeid; /* Inode ID */
173 __u64 generation; /* Inode generation: nodeid:gen must
174 be unique for the fs's lifetime */
175 __u64 entry_valid; /* Cache timeout for the name */
176 __u64 attr_valid; /* Cache timeout for the attributes */
177 __u32 entry_valid_nsec;
178 __u32 attr_valid_nsec;
179 struct fuse_attr attr;
182 struct fuse_forget_in {
186 struct fuse_getattr_in {
192 struct fuse_attr_out {
193 __u64 attr_valid; /* Cache timeout for the attributes */
194 __u32 attr_valid_nsec;
196 struct fuse_attr attr;
199 struct fuse_mknod_in {
204 struct fuse_mkdir_in {
209 struct fuse_rename_in {
213 struct fuse_link_in {
217 struct fuse_setattr_in {
236 struct fuse_open_in {
241 struct fuse_open_out {
247 struct fuse_release_in {
254 struct fuse_flush_in {
261 struct fuse_read_in {
268 struct fuse_write_in {
275 struct fuse_write_out {
280 #define FUSE_COMPAT_STATFS_SIZE 48
282 struct fuse_statfs_out {
283 struct fuse_kstatfs st;
286 struct fuse_fsync_in {
292 struct fuse_setxattr_in {
297 struct fuse_getxattr_in {
302 struct fuse_getxattr_out {
310 struct fuse_file_lock lk;
316 struct fuse_file_lock lk;
319 struct fuse_access_in {
324 struct fuse_init_in {
331 struct fuse_init_out {
340 struct fuse_interrupt_in {
344 struct fuse_bmap_in {
350 struct fuse_bmap_out {
354 struct fuse_in_header {
365 struct fuse_out_header {
379 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
380 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
381 #define FUSE_DIRENT_SIZE(d) \
382 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)