Annotation of prex/usr/server/fs/vfs/vfs.h, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #ifndef _VFS_H
31: #define _VFS_H
32:
33: #include <prex/prex.h>
34: #include <sys/vnode.h>
35: #include <sys/file.h>
36: #include <sys/mount.h>
37: #include <sys/dirent.h>
38:
39: #include <assert.h>
40:
41: /*
42: * Tunable parameters
43: */
44: #define PRIO_FS 128 /* priority of file system server */
45: #define FSMAXNAMES 16 /* max length of 'file system' name */
46:
47: /* #define DEBUG_VFS 1 */
48:
49: #ifdef DEBUG_VFS
50: extern int vfs_debug;
51:
52: #define VFSDB_CORE 0x00000001
53: #define VFSDB_SYSCALL 0x00000002
54: #define VFSDB_VNODE 0x00000004
55: #define VFSDB_BIO 0x00000008
56:
57: #define DPRINTF(_m,X) if (vfs_debug & (_m)) dprintf X
58: #else
59: #define DPRINTF(_m, X)
60: #endif
61:
62: #ifdef DEBUG
63: #define ASSERT(e) assert(e)
64: #else
65: #define ASSERT(e)
66: #endif
67:
68: #if CONFIG_FS_THREADS > 1
69: #define malloc(s) malloc_r(s)
70: #define free(p) free_r(p)
71: #else
72: #define mutex_init(m) do {} while (0)
73: #define mutex_destroy(m) do {} while (0)
74: #define mutex_lock(m) do {} while (0)
75: #define mutex_unlock(m) do {} while (0)
76: #define mutex_trylock(m) do {} while (0)
77: #endif
78:
79: /*
80: * per task data
81: */
82: struct task {
83: struct list link; /* hash link */
84: task_t task; /* task id */
85: char cwd[PATH_MAX]; /* current working directory */
86: file_t cwdfp; /* directory for cwd */
87: file_t file[OPEN_MAX]; /* array of file pointers */
88: int nopens; /* number of opening files */
89: mutex_t lock; /* lock for this task */
90: cap_t cap; /* task capabilities */
91: };
92:
93: extern const struct vfssw vfssw_table[];
94:
95: extern struct task *task_lookup(task_t task);
96: extern int task_alloc(task_t task, struct task **pt);
97: extern void task_free(struct task *t);
98: extern void task_update(struct task *t, task_t task);
99: extern void task_unlock(struct task *t);
100: extern file_t task_getfp(struct task *t, int fd);
101: extern int task_newfd(struct task *t);
102: extern int task_conv(struct task *t, char *path, char *full);
103: extern void task_dump(void);
104: extern void task_init(void);
105:
106: extern int namei(char *path, vnode_t *vpp);
107: extern int lookup(char *path, vnode_t *vpp, char **name);
108:
109: extern void vnode_init(void);
110: #ifdef DEBUG
111: extern void vnode_dump(void);
112: #endif
113:
114: extern int sys_mount(char *dev, char *dir, char *fsname, int flags, void *data);
115: extern int sys_umount(char *path);
116: extern int sys_sync(void);
117: extern int vfs_findroot(char *path, mount_t *mp, char **root);
118: extern void vfs_busy(mount_t mp);
119: extern void vfs_unbusy(mount_t mp);
120: #ifdef DEBUG
121: extern void mount_dump(void);
122: #endif
123:
124: extern int sys_open(char *path, int flags, mode_t mode, file_t *pfp);
125: extern int sys_close(file_t fp);
126: extern int sys_read(file_t fp, void *buf, size_t size, size_t *result);
127: extern int sys_write(file_t fp, void *buf, size_t size, size_t *result);
128: extern int sys_lseek(file_t fp, off_t off, int type, off_t * cur_off);
129: extern int sys_ioctl(file_t fp, u_long request, void *buf);
130: extern int sys_fstat(file_t fp, struct stat *st);
131: extern int sys_fsync(file_t fp);
132:
133: extern int sys_opendir(char *path, file_t * file);
134: extern int sys_closedir(file_t fp);
135: extern int sys_readdir(file_t fp, struct dirent *dirent);
136: extern int sys_rewinddir(file_t fp);
137: extern int sys_seekdir(file_t fp, long loc);
138: extern int sys_telldir(file_t fp, long *loc);
139: extern int sys_mkdir(char *path, mode_t mode);
140: extern int sys_rmdir(char *path);
141: extern int sys_mknod(char *path, mode_t mode);
142: extern int sys_rename(char *src, char *dest);
143: extern int sys_unlink(char *path);
144: extern int sys_access(char *path, int mode);
145: extern int sys_stat(char *path, struct stat *st);
146:
147: #endif /* !_VFS_H */
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