Annotation of prex-old/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: #include <sys/syslog.h>
39:
40: #include <assert.h>
41:
42: /*
43: * Tunable parameters
44: */
45: #define PRIO_FS 128 /* priority of file system server */
46: #define FSMAXNAMES 16 /* max length of 'file system' name */
47:
48: #ifdef DEBUG
49: /* #define DEBUG_VFS 1 */
50: /* #define DEBUG_VNODE 1 */
51: /* #define DEBUG_BIO 1 */
52: #endif
53:
54: #ifdef DEBUG_VFS
55: #define dprintf(fmt, args...) syslog(LOG_DEBUG, "vfs: "fmt, ## args)
56: #else
57: #define dprintf(fmt...) do {} while (0)
58: #endif
59: #ifdef DEBUG_VNODE
60: #define vn_printf(fmt, args...) syslog(LOG_DEBUG, fmt, ## args)
61: #else
62: #define vn_printf(fmt...) do {} while (0)
63: #endif
64: #ifdef DEBUG_BIO
65: #define bio_printf(fmt, args...) syslog(LOG_DEBUG, fmt, ## args)
66: #else
67: #define bio_printf(fmt...) do {} while (0)
68: #endif
69:
70: #ifdef DEBUG
71: #define ASSERT(e) assert(e)
72: #else
73: #define ASSERT(e)
74: #endif
75:
76: #if CONFIG_FS_THREADS > 1
77: #define malloc(s) malloc_r(s)
78: #define free(p) free_r(p)
79: #else
80: #define mutex_init(m) do {} while (0)
81: #define mutex_destroy(m) do {} while (0)
82: #define mutex_lock(m) do {} while (0)
83: #define mutex_unlock(m) do {} while (0)
84: #define mutex_trylock(m) do {} while (0)
85: #endif
86:
87: /*
88: * per task data
89: */
90: struct task {
91: struct list link; /* hash link */
92: task_t task; /* task id */
93: char cwd[PATH_MAX]; /* current working directory */
94: file_t cwd_fp; /* directory for cwd */
95: file_t file[OPEN_MAX]; /* array of file pointers */
96: int nr_open; /* number of opening files */
97: mutex_t lock; /* lock for this task */
98: cap_t cap; /* task capabilities */
99: };
100:
101: extern const struct vfssw vfssw_table[];
102:
103: extern struct task *task_lookup(task_t task);
104: extern int task_alloc(task_t task, struct task **pt);
105: extern void task_free(struct task *t);
106: extern void task_update(struct task *t, task_t task);
107: extern void task_unlock(struct task *t);
108: extern file_t task_getfp(struct task *t, int fd);
109: extern int task_conv(struct task *t, char *path, char *full);
110: extern void task_dump(void);
111: extern void task_init(void);
112:
113: extern int namei(char *path, vnode_t *vpp);
114: extern int lookup(char *path, vnode_t *vpp, char **name);
115:
116: extern vnode_t vn_lookup(mount_t mp, char *path);
117: extern void vn_lock(vnode_t vp);
118: extern void vn_unlock(vnode_t vp);
119: extern vnode_t vget(mount_t mp, char *path);
120: extern void vput(vnode_t vp);
121: extern void vgone(vnode_t vp);
122: extern void vref(vnode_t vp);
123: extern void vrele(vnode_t vp);
124: extern int vcount(vnode_t vp);
125: extern void vflush(mount_t mp);
126: extern void vnode_init(void);
127: #ifdef DEBUG
128: extern void vnode_dump(void);
129: #endif
130:
131: extern void bio_init(void);
132:
133: extern int sys_mount(char *dev, char *dir, char *fsname, int flags, void *data);
134: extern int sys_umount(char *path);
135: extern int sys_sync(void);
136: extern int vfs_findroot(char *path, mount_t *mp, char **root);
137: extern void vfs_busy(mount_t mp);
138: extern void vfs_unbusy(mount_t mp);
139: #ifdef DEBUG
140: extern void mount_dump(void);
141: #endif
142:
143: extern int sys_open(char *path, int flags, mode_t mode, file_t * file);
144: extern int sys_close(file_t fl);
145: extern int sys_read(file_t fl, void *buf, size_t size, size_t *result);
146: extern int sys_write(file_t fl, void *buf, size_t size, size_t *result);
147: extern int sys_lseek(file_t fl, off_t off, int type, off_t * cur_off);
148: extern int sys_ioctl(file_t fl, int request, char *buf);
149: extern int sys_fstat(file_t fl, struct stat *st);
150: extern int sys_fsync(file_t fl);
151:
152: extern int sys_opendir(char *path, file_t * file);
153: extern int sys_closedir(file_t fl);
154: extern int sys_readdir(file_t fl, struct dirent *dirent);
155: extern int sys_rewinddir(file_t fl);
156: extern int sys_seekdir(file_t fl, long loc);
157: extern int sys_telldir(file_t fl, long *loc);
158: extern int sys_mkdir(char *path, mode_t mode);
159: extern int sys_rmdir(char *path);
160: extern int sys_mknod(char *path, mode_t mode);
161: extern int sys_rename(char *src, char *dest);
162: extern int sys_unlink(char *path);
163: extern int sys_access(char *path, int mode);
164:
165: #endif /* !_VFS_H */
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