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 * - add nonseekable open flag
28 #include <asm/types.h>
29 #include <linux/major.h>
31 /** Version number of this interface */
32 #define FUSE_KERNEL_VERSION 7
34 /** Minor version number of this interface */
35 #define FUSE_KERNEL_MINOR_VERSION 10
37 /** The node ID of the root inode */
38 #define FUSE_ROOT_ID 1
40 /** The major number of the fuse character device */
41 #define FUSE_MAJOR MISC_MAJOR
43 /** The minor number of the fuse character device */
44 #define FUSE_MINOR 229
46 /* Make sure all structures are padded to 64bit boundary, so 32bit
47 userspace works under 64bit kernels */
81 struct fuse_file_lock {
89 * Bitmasks for fuse_setattr_in.valid
91 #define FATTR_MODE (1 << 0)
92 #define FATTR_UID (1 << 1)
93 #define FATTR_GID (1 << 2)
94 #define FATTR_SIZE (1 << 3)
95 #define FATTR_ATIME (1 << 4)
96 #define FATTR_MTIME (1 << 5)
97 #define FATTR_FH (1 << 6)
98 #define FATTR_ATIME_NOW (1 << 7)
99 #define FATTR_MTIME_NOW (1 << 8)
100 #define FATTR_LOCKOWNER (1 << 9)
103 * Flags returned by the OPEN request
105 * FOPEN_DIRECT_IO: bypass page cache for this open file
106 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
107 * FOPEN_NONSEEKABLE: the file is not seekable
109 #define FOPEN_DIRECT_IO (1 << 0)
110 #define FOPEN_KEEP_CACHE (1 << 1)
111 #define FOPEN_NONSEEKABLE (1 << 2)
114 * INIT request/reply flags
116 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
118 #define FUSE_ASYNC_READ (1 << 0)
119 #define FUSE_POSIX_LOCKS (1 << 1)
120 #define FUSE_FILE_OPS (1 << 2)
121 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
122 #define FUSE_EXPORT_SUPPORT (1 << 4)
123 #define FUSE_BIG_WRITES (1 << 5)
128 #define FUSE_RELEASE_FLUSH (1 << 0)
133 #define FUSE_GETATTR_FH (1 << 0)
138 #define FUSE_LK_FLOCK (1 << 0)
143 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
144 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
146 #define FUSE_WRITE_CACHE (1 << 0)
147 #define FUSE_WRITE_LOCKOWNER (1 << 1)
152 #define FUSE_READ_LOCKOWNER (1 << 1)
156 FUSE_FORGET = 2, /* no reply */
176 FUSE_REMOVEXATTR = 24,
181 FUSE_RELEASEDIR = 29,
193 /* The read buffer is required to be at least 8k, but may be much larger */
194 #define FUSE_MIN_READ_BUFFER 8192
196 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
198 struct fuse_entry_out {
199 __u64 nodeid; /* Inode ID */
200 __u64 generation; /* Inode generation: nodeid:gen must
201 be unique for the fs's lifetime */
202 __u64 entry_valid; /* Cache timeout for the name */
203 __u64 attr_valid; /* Cache timeout for the attributes */
204 __u32 entry_valid_nsec;
205 __u32 attr_valid_nsec;
206 struct fuse_attr attr;
209 struct fuse_forget_in {
213 struct fuse_getattr_in {
219 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
221 struct fuse_attr_out {
222 __u64 attr_valid; /* Cache timeout for the attributes */
223 __u32 attr_valid_nsec;
225 struct fuse_attr attr;
228 struct fuse_mknod_in {
233 struct fuse_mkdir_in {
238 struct fuse_rename_in {
242 struct fuse_link_in {
246 struct fuse_setattr_in {
265 struct fuse_open_in {
270 struct fuse_open_out {
276 struct fuse_release_in {
283 struct fuse_flush_in {
290 struct fuse_read_in {
300 #define FUSE_COMPAT_WRITE_IN_SIZE 24
302 struct fuse_write_in {
312 struct fuse_write_out {
317 #define FUSE_COMPAT_STATFS_SIZE 48
319 struct fuse_statfs_out {
320 struct fuse_kstatfs st;
323 struct fuse_fsync_in {
329 struct fuse_setxattr_in {
334 struct fuse_getxattr_in {
339 struct fuse_getxattr_out {
347 struct fuse_file_lock lk;
353 struct fuse_file_lock lk;
356 struct fuse_access_in {
361 struct fuse_init_in {
368 struct fuse_init_out {
377 struct fuse_interrupt_in {
381 struct fuse_bmap_in {
387 struct fuse_bmap_out {
391 struct fuse_in_header {
402 struct fuse_out_header {
416 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
417 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
418 #define FUSE_DIRENT_SIZE(d) \
419 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
421 #endif /* _LINUX_FUSE_H */