root / prex-0.9.0 / usr / server / fs / vfs / vfs.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005-2007, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #ifndef _VFS_H
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31 | #define _VFS_H
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32 | |||
33 | #include <sys/cdefs.h> |
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34 | #include <sys/prex.h> |
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35 | #include <sys/vnode.h> |
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36 | #include <sys/file.h> |
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37 | #include <sys/mount.h> |
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38 | #include <sys/dirent.h> |
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39 | |||
40 | #include <assert.h> |
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41 | |||
42 | /* #define DEBUG_VFS 1 */
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43 | |||
44 | /*
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45 | * Tunable parameters
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46 | */
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47 | #define FSMAXNAMES 16 /* max length of 'file system' name */ |
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48 | |||
49 | #ifdef DEBUG_VFS
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50 | extern int vfs_debug; |
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51 | |||
52 | #define VFSDB_CORE 0x00000001 |
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53 | #define VFSDB_SYSCALL 0x00000002 |
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54 | #define VFSDB_VNODE 0x00000004 |
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55 | #define VFSDB_BIO 0x00000008 |
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56 | #define VFSDB_CAP 0x00000010 |
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57 | |||
58 | #define VFSDB_FLAGS 0x00000013 |
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59 | |||
60 | #define DPRINTF(_m,X) if (vfs_debug & (_m)) dprintf X |
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61 | #define ASSERT(e) dassert(e)
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62 | #else
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63 | #define DPRINTF(_m, X)
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64 | #define ASSERT(e)
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65 | #endif
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66 | |||
67 | #if CONFIG_FS_THREADS > 1 |
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68 | #define malloc(s) malloc_r(s)
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69 | #define free(p) free_r(p)
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70 | #else
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71 | #define mutex_init(m) do {} while (0) |
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72 | #define mutex_destroy(m) do {} while (0) |
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73 | #define mutex_lock(m) do {} while (0) |
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74 | #define mutex_unlock(m) do {} while (0) |
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75 | #define mutex_trylock(m) do {} while (0) |
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76 | #endif
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77 | |||
78 | /*
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79 | * per task data
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80 | */
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81 | struct task {
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82 | struct list t_link; /* hash link */ |
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83 | task_t t_taskid; /* task id */
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84 | char t_cwd[PATH_MAX]; /* current working directory */ |
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85 | file_t t_cwdfp; /* directory for cwd */
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86 | file_t t_ofile[NOFILE]; /* pointers to file structures of open files */
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87 | int t_nopens; /* number of opening files */ |
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88 | mutex_t t_lock; /* lock for this task */
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89 | }; |
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90 | |||
91 | extern const struct vfssw vfssw[]; |
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92 | |||
93 | __BEGIN_DECLS |
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94 | int sys_open(char *path, int flags, mode_t mode, file_t *pfp); |
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95 | int sys_close(file_t fp);
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96 | int sys_read(file_t fp, void *buf, size_t size, size_t *result); |
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97 | int sys_write(file_t fp, void *buf, size_t size, size_t *result); |
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98 | int sys_lseek(file_t fp, off_t off, int type, off_t * cur_off); |
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99 | int sys_ioctl(file_t fp, u_long request, void *buf); |
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100 | int sys_fstat(file_t fp, struct stat *st); |
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101 | int sys_fsync(file_t fp);
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102 | int sys_ftruncate(file_t fp, off_t length);
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103 | |||
104 | int sys_opendir(char *path, file_t * file); |
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105 | int sys_closedir(file_t fp);
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106 | int sys_readdir(file_t fp, struct dirent *dirent); |
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107 | int sys_rewinddir(file_t fp);
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108 | int sys_seekdir(file_t fp, long loc); |
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109 | int sys_telldir(file_t fp, long *loc); |
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110 | int sys_fchdir(file_t fp, char *path); |
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111 | |||
112 | int sys_mkdir(char *path, mode_t mode); |
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113 | int sys_rmdir(char *path); |
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114 | int sys_mknod(char *path, mode_t mode); |
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115 | int sys_rename(char *src, char *dest); |
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116 | int sys_unlink(char *path); |
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117 | int sys_access(char *path, int mode); |
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118 | int sys_stat(char *path, struct stat *st); |
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119 | int sys_truncate(char *path, off_t length); |
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120 | |||
121 | int sys_mount(char *dev, char *dir, char *fsname, int flags, void *data); |
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122 | int sys_umount(char *path); |
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123 | int sys_sync(void); |
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124 | |||
125 | |||
126 | struct task *task_lookup(task_t task);
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127 | int task_alloc(task_t task, struct task **pt); |
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128 | void task_free(struct task *t); |
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129 | void task_setid(struct task *t, task_t task); |
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130 | void task_unlock(struct task *t); |
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131 | |||
132 | file_t task_getfp(struct task *t, int fd); |
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133 | void task_setfp(struct task *t, int fd, file_t fp); |
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134 | int task_newfd(struct task *t); |
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135 | void task_delfd(struct task *t, int fd); |
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136 | |||
137 | int task_conv(struct task *t, char *path, int mode, char *full); |
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138 | void task_init(void); |
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139 | |||
140 | int sec_file_permission(task_t task, char *path, int mode); |
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141 | int sec_vnode_permission(char *path); |
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142 | |||
143 | int namei(char *path, vnode_t *vpp); |
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144 | int lookup(char *path, vnode_t *vpp, char **name); |
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145 | void vnode_init(void); |
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146 | |||
147 | int vfs_findroot(char *path, mount_t *mp, char **root); |
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148 | void vfs_busy(mount_t mp);
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149 | void vfs_unbusy(mount_t mp);
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150 | |||
151 | int fs_noop(void); |
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152 | |||
153 | #ifdef DEBUG_VFS
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154 | void task_dump(void); |
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155 | void vnode_dump(void); |
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156 | void mount_dump(void); |
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157 | #endif
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158 | __END_DECLS |
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159 | |||
160 | #endif /* !_VFS_H */ |