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
25 #include <asm/types.h>
26 #include <linux/major.h>
28 /** Version number of this interface */
29 #define FUSE_KERNEL_VERSION 7
31 /** Minor version number of this interface */
32 #define FUSE_KERNEL_MINOR_VERSION 9
34 /** The node ID of the root inode */
35 #define FUSE_ROOT_ID 1
37 /** The major number of the fuse character device */
38 #define FUSE_MAJOR MISC_MAJOR
40 /** The minor number of the fuse character device */
41 #define FUSE_MINOR 229
43 /* Make sure all structures are padded to 64bit boundary, so 32bit
44 userspace works under 64bit kernels */
78 struct fuse_file_lock {
86 * Bitmasks for fuse_setattr_in.valid
88 #define FATTR_MODE (1 << 0)
89 #define FATTR_UID (1 << 1)
90 #define FATTR_GID (1 << 2)
91 #define FATTR_SIZE (1 << 3)
92 #define FATTR_ATIME (1 << 4)
93 #define FATTR_MTIME (1 << 5)
94 #define FATTR_FH (1 << 6)
95 #define FATTR_ATIME_NOW (1 << 7)
96 #define FATTR_MTIME_NOW (1 << 8)
97 #define FATTR_LOCKOWNER (1 << 9)
100 * Flags returned by the OPEN request
102 * FOPEN_DIRECT_IO: bypass page cache for this open file
103 * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
105 #define FOPEN_DIRECT_IO (1 << 0)
106 #define FOPEN_KEEP_CACHE (1 << 1)
109 * INIT request/reply flags
111 * FUSE_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
113 #define FUSE_ASYNC_READ (1 << 0)
114 #define FUSE_POSIX_LOCKS (1 << 1)
115 #define FUSE_FILE_OPS (1 << 2)
116 #define FUSE_ATOMIC_O_TRUNC (1 << 3)
117 #define FUSE_EXPORT_SUPPORT (1 << 4)
118 #define FUSE_BIG_WRITES (1 << 5)
123 #define FUSE_RELEASE_FLUSH (1 << 0)
128 #define FUSE_GETATTR_FH (1 << 0)
133 #define FUSE_LK_FLOCK (1 << 0)
138 * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
139 * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
141 #define FUSE_WRITE_CACHE (1 << 0)
142 #define FUSE_WRITE_LOCKOWNER (1 << 1)
147 #define FUSE_READ_LOCKOWNER (1 << 1)
151 FUSE_FORGET = 2, /* no reply */
171 FUSE_REMOVEXATTR = 24,
176 FUSE_RELEASEDIR = 29,
188 /* The read buffer is required to be at least 8k, but may be much larger */
189 #define FUSE_MIN_READ_BUFFER 8192
191 #define FUSE_COMPAT_ENTRY_OUT_SIZE 120
193 struct fuse_entry_out {
194 __u64 nodeid; /* Inode ID */
195 __u64 generation; /* Inode generation: nodeid:gen must
196 be unique for the fs's lifetime */
197 __u64 entry_valid; /* Cache timeout for the name */
198 __u64 attr_valid; /* Cache timeout for the attributes */
199 __u32 entry_valid_nsec;
200 __u32 attr_valid_nsec;
201 struct fuse_attr attr;
204 struct fuse_forget_in {
208 struct fuse_getattr_in {
214 #define FUSE_COMPAT_ATTR_OUT_SIZE 96
216 struct fuse_attr_out {
217 __u64 attr_valid; /* Cache timeout for the attributes */
218 __u32 attr_valid_nsec;
220 struct fuse_attr attr;
223 struct fuse_mknod_in {
228 struct fuse_mkdir_in {
233 struct fuse_rename_in {
237 struct fuse_link_in {
241 struct fuse_setattr_in {
260 struct fuse_open_in {
265 struct fuse_open_out {
271 struct fuse_release_in {
278 struct fuse_flush_in {
285 struct fuse_read_in {
295 #define FUSE_COMPAT_WRITE_IN_SIZE 24
297 struct fuse_write_in {
307 struct fuse_write_out {
312 #define FUSE_COMPAT_STATFS_SIZE 48
314 struct fuse_statfs_out {
315 struct fuse_kstatfs st;
318 struct fuse_fsync_in {
324 struct fuse_setxattr_in {
329 struct fuse_getxattr_in {
334 struct fuse_getxattr_out {
342 struct fuse_file_lock lk;
348 struct fuse_file_lock lk;
351 struct fuse_access_in {
356 struct fuse_init_in {
363 struct fuse_init_out {
372 struct fuse_interrupt_in {
376 struct fuse_bmap_in {
382 struct fuse_bmap_out {
386 struct fuse_in_header {
397 struct fuse_out_header {
411 #define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
412 #define FUSE_DIRENT_ALIGN(x) (((x) + sizeof(__u64) - 1) & ~(sizeof(__u64) - 1))
413 #define FUSE_DIRENT_SIZE(d) \
414 FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
416 #endif /* _LINUX_FUSE_H */