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 #define FUSE_ASYNC_READ (1 << 0)
109 #define FUSE_POSIX_LOCKS (1 << 1)
110 #define FUSE_FILE_OPS (1 << 2)
111 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
112 #define FUSE_BIG_WRITES (1 << 5)
117 #define FUSE_RELEASE_FLUSH (1 << 0)
122 #define FUSE_GETATTR_FH (1 << 0)
127 #define FUSE_LK_FLOCK (1 << 0)
132 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
133 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
135 #define FUSE_WRITE_CACHE (1 << 0)
136 #define FUSE_WRITE_LOCKOWNER (1 << 1)
141 #define FUSE_READ_LOCKOWNER (1 << 1)
145 FUSE_FORGET = 2, /* no reply */
165 FUSE_REMOVEXATTR = 24,
170 FUSE_RELEASEDIR = 29,
182 /* The read buffer is required to be at least 8k, but may be much larger */
183 #define FUSE_MIN_READ_BUFFER 8192
185 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
187 struct fuse_entry_out {
188 __u64 nodeid; /* Inode ID */
189 __u64 generation; /* Inode generation: nodeid:gen must
190 be unique for the fs's lifetime */
191 __u64 entry_valid; /* Cache timeout for the name */
192 __u64 attr_valid; /* Cache timeout for the attributes */
193 __u32 entry_valid_nsec;
194 __u32 attr_valid_nsec;
195 struct fuse_attr attr;
198 struct fuse_forget_in {
202 struct fuse_getattr_in {
208 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
210 struct fuse_attr_out {
211 __u64 attr_valid; /* Cache timeout for the attributes */
212 __u32 attr_valid_nsec;
214 struct fuse_attr attr;
217 struct fuse_mknod_in {
222 struct fuse_mkdir_in {
227 struct fuse_rename_in {
231 struct fuse_link_in {
235 struct fuse_setattr_in {
254 struct fuse_open_in {
259 struct fuse_open_out {
265 struct fuse_release_in {
272 struct fuse_flush_in {
279 struct fuse_read_in {
289 #define FUSE_COMPAT_WRITE_IN_SIZE 24
291 struct fuse_write_in {
301 struct fuse_write_out {
306 #define FUSE_COMPAT_STATFS_SIZE 48
308 struct fuse_statfs_out {
309 struct fuse_kstatfs st;
312 struct fuse_fsync_in {
318 struct fuse_setxattr_in {
323 struct fuse_getxattr_in {
328 struct fuse_getxattr_out {
336 struct fuse_file_lock lk;
342 struct fuse_file_lock lk;
345 struct fuse_access_in {
350 struct fuse_init_in {
357 struct fuse_init_out {
366 struct fuse_interrupt_in {
370 struct fuse_bmap_in {
376 struct fuse_bmap_out {
380 struct fuse_in_header {
391 struct fuse_out_header {
405 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
406 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
407 #define FUSE_DIRENT_SIZE(d) \
408 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)