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
20 #include <asm/types.h>
21 #include <linux/major.h>
23 /** Version number of this interface */
24 #define FUSE_KERNEL_VERSION 7
26 /** Minor version number of this interface */
27 #define FUSE_KERNEL_MINOR_VERSION 9
29 /** The node ID of the root inode */
30 #define FUSE_ROOT_ID 1
32 /** The major number of the fuse character device */
33 #define FUSE_MAJOR MISC_MAJOR
35 /** The minor number of the fuse character device */
36 #define FUSE_MINOR 229
38 /* Make sure all structures are padded to 64bit boundary, so 32bit
39 userspace works under 64bit kernels */
71 struct fuse_file_lock {
79 * Bitmasks for fuse_setattr_in.valid
81 #define FATTR_MODE (1 << 0)
82 #define FATTR_UID (1 << 1)
83 #define FATTR_GID (1 << 2)
84 #define FATTR_SIZE (1 << 3)
85 #define FATTR_ATIME (1 << 4)
86 #define FATTR_MTIME (1 << 5)
87 #define FATTR_FH (1 << 6)
88 #define FATTR_ATIME_NOW (1 << 7)
89 #define FATTR_MTIME_NOW (1 << 8)
90 #define FATTR_LOCKOWNER (1 << 9)
93 * Flags returned by the OPEN request
95 * FOPEN_DIRECT_IO: bypass page cache for this open file
96 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
98 #define FOPEN_DIRECT_IO (1 << 0)
99 #define FOPEN_KEEP_CACHE (1 << 1)
102 * INIT request/reply flags
104 #define FUSE_ASYNC_READ (1 << 0)
105 #define FUSE_POSIX_LOCKS (1 << 1)
106 #define FUSE_FILE_OPS (1 << 2)
107 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
112 #define FUSE_RELEASE_FLUSH (1 << 0)
117 #define FUSE_GETATTR_FH (1 << 0)
122 #define FUSE_LK_FLOCK (1 << 0)
127 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
128 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
130 #define FUSE_WRITE_CACHE (1 << 0)
131 #define FUSE_WRITE_LOCKOWNER (1 << 1)
136 #define FUSE_READ_LOCKOWNER (1 << 1)
140 FUSE_FORGET = 2, /* no reply */
160 FUSE_REMOVEXATTR = 24,
165 FUSE_RELEASEDIR = 29,
177 /* The read buffer is required to be at least 8k, but may be much larger */
178 #define FUSE_MIN_READ_BUFFER 8192
180 struct fuse_entry_out {
181 __u64 nodeid; /* Inode ID */
182 __u64 generation; /* Inode generation: nodeid:gen must
183 be unique for the fs's lifetime */
184 __u64 entry_valid; /* Cache timeout for the name */
185 __u64 attr_valid; /* Cache timeout for the attributes */
186 __u32 entry_valid_nsec;
187 __u32 attr_valid_nsec;
188 struct fuse_attr attr;
191 struct fuse_forget_in {
195 struct fuse_getattr_in {
201 struct fuse_attr_out {
202 __u64 attr_valid; /* Cache timeout for the attributes */
203 __u32 attr_valid_nsec;
205 struct fuse_attr attr;
208 struct fuse_mknod_in {
213 struct fuse_mkdir_in {
218 struct fuse_rename_in {
222 struct fuse_link_in {
226 struct fuse_setattr_in {
245 struct fuse_open_in {
250 struct fuse_open_out {
256 struct fuse_release_in {
263 struct fuse_flush_in {
270 struct fuse_read_in {
278 #define FUSE_COMPAT_WRITE_IN_SIZE 24
280 struct fuse_write_in {
288 struct fuse_write_out {
293 #define FUSE_COMPAT_STATFS_SIZE 48
295 struct fuse_statfs_out {
296 struct fuse_kstatfs st;
299 struct fuse_fsync_in {
305 struct fuse_setxattr_in {
310 struct fuse_getxattr_in {
315 struct fuse_getxattr_out {
323 struct fuse_file_lock lk;
329 struct fuse_file_lock lk;
332 struct fuse_access_in {
337 struct fuse_init_in {
344 struct fuse_init_out {
353 struct fuse_interrupt_in {
357 struct fuse_bmap_in {
363 struct fuse_bmap_out {
367 struct fuse_in_header {
378 struct fuse_out_header {
392 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
393 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
394 #define FUSE_DIRENT_SIZE(d) \
395 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)