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2671 | jermar | 1 | /* |
2684 | jermar | 2 | * Copyright (c) 2008 Jakub Jermar |
2671 | jermar | 3 | * All rights reserved. |
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 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup libc |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <vfs.h> |
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2694 | jermar | 36 | #include <stdlib.h> |
2674 | jermar | 37 | #include <unistd.h> |
2694 | jermar | 38 | #include <dirent.h> |
2674 | jermar | 39 | #include <fcntl.h> |
2707 | jermar | 40 | #include <sys/stat.h> |
41 | #include <sys/types.h> |
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2671 | jermar | 42 | #include <ipc/ipc.h> |
43 | #include <ipc/services.h> |
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44 | #include <async.h> |
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45 | #include <atomic.h> |
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46 | #include <futex.h> |
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47 | #include <errno.h> |
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48 | #include <string.h> |
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49 | #include "../../srv/vfs/vfs.h" |
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50 | |||
51 | int vfs_phone = -1; |
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52 | atomic_t vfs_phone_futex = FUTEX_INITIALIZER; |
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53 | |||
54 | static int vfs_connect(void) |
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55 | { |
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56 | if (vfs_phone < 0) |
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57 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
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58 | return vfs_phone; |
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59 | } |
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60 | |||
61 | int mount(const char *fs_name, const char *mp, const char *dev) |
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62 | { |
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63 | int res; |
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64 | ipcarg_t rc; |
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65 | aid_t req; |
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66 | |||
67 | int dev_handle = 0; /* TODO */ |
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68 | |||
69 | futex_down(&vfs_phone_futex); |
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70 | async_serialize_start(); |
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71 | if (vfs_phone < 0) { |
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72 | res = vfs_connect(); |
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73 | if (res < 0) { |
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74 | async_serialize_end(); |
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75 | futex_up(&vfs_phone_futex); |
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76 | return res; |
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77 | } |
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78 | } |
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79 | req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL); |
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2678 | jermar | 80 | rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name)); |
2671 | jermar | 81 | if (rc != EOK) { |
82 | async_wait_for(req, NULL); |
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83 | async_serialize_end(); |
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84 | futex_up(&vfs_phone_futex); |
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85 | return (int) rc; |
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86 | } |
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2678 | jermar | 87 | rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp)); |
2671 | jermar | 88 | if (rc != EOK) { |
89 | async_wait_for(req, NULL); |
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90 | async_serialize_end(); |
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91 | futex_up(&vfs_phone_futex); |
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92 | return (int) rc; |
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93 | } |
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94 | async_wait_for(req, &rc); |
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95 | async_serialize_end(); |
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96 | futex_up(&vfs_phone_futex); |
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97 | return (int) rc; |
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98 | } |
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99 | |||
2700 | jermar | 100 | static int _open(const char *path, int lflag, int oflag, ...) |
2671 | jermar | 101 | { |
102 | int res; |
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103 | ipcarg_t rc; |
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104 | ipc_call_t answer; |
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105 | aid_t req; |
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106 | |||
107 | futex_down(&vfs_phone_futex); |
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108 | async_serialize_start(); |
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109 | if (vfs_phone < 0) { |
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110 | res = vfs_connect(); |
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111 | if (res < 0) { |
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112 | async_serialize_end(); |
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113 | futex_up(&vfs_phone_futex); |
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114 | return res; |
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115 | } |
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116 | } |
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2700 | jermar | 117 | req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer); |
2693 | jermar | 118 | rc = ipc_data_write_start(vfs_phone, path, strlen(path)); |
2671 | jermar | 119 | if (rc != EOK) { |
120 | async_wait_for(req, NULL); |
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121 | async_serialize_end(); |
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122 | futex_up(&vfs_phone_futex); |
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123 | return (int) rc; |
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124 | } |
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125 | async_wait_for(req, &rc); |
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126 | async_serialize_end(); |
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127 | futex_up(&vfs_phone_futex); |
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128 | return (int) IPC_GET_ARG1(answer); |
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129 | } |
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130 | |||
2700 | jermar | 131 | int open(const char *path, int oflag, ...) |
132 | { |
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133 | return _open(path, L_FILE, oflag); |
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134 | } |
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135 | |||
2707 | jermar | 136 | int close(int fildes) |
137 | { |
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138 | return 0; /* TODO */ |
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139 | } |
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140 | |||
2671 | jermar | 141 | ssize_t read(int fildes, void *buf, size_t nbyte) |
142 | { |
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143 | int res; |
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144 | ipcarg_t rc; |
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145 | ipc_call_t answer; |
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146 | aid_t req; |
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147 | |||
148 | futex_down(&vfs_phone_futex); |
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149 | async_serialize_start(); |
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150 | if (vfs_phone < 0) { |
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151 | res = vfs_connect(); |
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152 | if (res < 0) { |
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153 | async_serialize_end(); |
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154 | futex_up(&vfs_phone_futex); |
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155 | return res; |
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156 | } |
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157 | } |
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2674 | jermar | 158 | req = async_send_1(vfs_phone, VFS_READ, fildes, &answer); |
2678 | jermar | 159 | if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) { |
2671 | jermar | 160 | async_wait_for(req, NULL); |
161 | async_serialize_end(); |
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162 | futex_up(&vfs_phone_futex); |
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163 | return (ssize_t) rc; |
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164 | } |
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165 | async_wait_for(req, &rc); |
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166 | async_serialize_end(); |
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167 | futex_up(&vfs_phone_futex); |
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2710 | jermar | 168 | if (rc == EOK) |
169 | return (ssize_t) IPC_GET_ARG1(answer); |
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170 | else |
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171 | return -1; |
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2671 | jermar | 172 | } |
173 | |||
2674 | jermar | 174 | ssize_t write(int fildes, const void *buf, size_t nbyte) |
175 | { |
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176 | int res; |
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177 | ipcarg_t rc; |
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178 | ipc_call_t answer; |
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179 | aid_t req; |
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180 | |||
181 | futex_down(&vfs_phone_futex); |
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182 | async_serialize_start(); |
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183 | if (vfs_phone < 0) { |
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184 | res = vfs_connect(); |
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185 | if (res < 0) { |
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186 | async_serialize_end(); |
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187 | futex_up(&vfs_phone_futex); |
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188 | return res; |
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189 | } |
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190 | } |
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191 | req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer); |
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2678 | jermar | 192 | if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) { |
2674 | jermar | 193 | async_wait_for(req, NULL); |
194 | async_serialize_end(); |
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195 | futex_up(&vfs_phone_futex); |
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196 | return (ssize_t) rc; |
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197 | } |
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198 | async_wait_for(req, &rc); |
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199 | async_serialize_end(); |
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200 | futex_up(&vfs_phone_futex); |
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2710 | jermar | 201 | if (rc == EOK) |
202 | return (ssize_t) IPC_GET_ARG1(answer); |
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203 | else |
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204 | return -1; |
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2674 | jermar | 205 | } |
2684 | jermar | 206 | |
207 | off_t lseek(int fildes, off_t offset, int whence) |
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208 | { |
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209 | int res; |
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210 | ipcarg_t rc; |
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211 | |||
212 | futex_down(&vfs_phone_futex); |
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213 | async_serialize_start(); |
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214 | if (vfs_phone < 0) { |
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215 | res = vfs_connect(); |
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216 | if (res < 0) { |
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217 | async_serialize_end(); |
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218 | futex_up(&vfs_phone_futex); |
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219 | return res; |
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220 | } |
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221 | } |
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222 | |||
223 | off_t newoffs; |
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224 | rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence, |
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2707 | jermar | 225 | (ipcarg_t)&newoffs); |
2684 | jermar | 226 | |
227 | async_serialize_end(); |
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228 | futex_up(&vfs_phone_futex); |
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229 | |||
230 | if (rc != EOK) |
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231 | return (off_t) -1; |
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232 | |||
233 | return newoffs; |
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234 | } |
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235 | |||
2693 | jermar | 236 | int ftruncate(int fildes, off_t length) |
237 | { |
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238 | int res; |
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239 | ipcarg_t rc; |
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240 | |||
241 | futex_down(&vfs_phone_futex); |
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242 | async_serialize_start(); |
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243 | if (vfs_phone < 0) { |
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244 | res = vfs_connect(); |
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245 | if (res < 0) { |
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246 | async_serialize_end(); |
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247 | futex_up(&vfs_phone_futex); |
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248 | return res; |
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249 | } |
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250 | } |
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251 | rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length); |
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252 | async_serialize_end(); |
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253 | futex_up(&vfs_phone_futex); |
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254 | return (int) rc; |
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255 | } |
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256 | |||
2694 | jermar | 257 | DIR *opendir(const char *dirname) |
258 | { |
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259 | DIR *dirp = malloc(sizeof(DIR)); |
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260 | if (!dirp) |
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261 | return NULL; |
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2700 | jermar | 262 | dirp->fd = _open(dirname, L_DIRECTORY, 0); |
2699 | jermar | 263 | if (dirp->fd < 0) { |
2694 | jermar | 264 | free(dirp); |
265 | return NULL; |
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266 | } |
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267 | return dirp; |
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268 | } |
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269 | |||
270 | struct dirent *readdir(DIR *dirp) |
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271 | { |
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2699 | jermar | 272 | ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1); |
273 | if (len <= 0) |
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274 | return NULL; |
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275 | return &dirp->res; |
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2694 | jermar | 276 | } |
277 | |||
278 | void rewinddir(DIR *dirp) |
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279 | { |
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2699 | jermar | 280 | (void) lseek(dirp->fd, 0, SEEK_SET); |
2694 | jermar | 281 | } |
282 | |||
283 | int closedir(DIR *dirp) |
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284 | { |
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285 | (void) close(dirp->fd); |
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286 | free(dirp); |
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287 | return 0; |
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288 | } |
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289 | |||
2707 | jermar | 290 | int mkdir(const char *path, mode_t mode) |
2694 | jermar | 291 | { |
2707 | jermar | 292 | int res; |
293 | ipcarg_t rc; |
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294 | ipc_call_t answer; |
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295 | aid_t req; |
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296 | |||
297 | futex_down(&vfs_phone_futex); |
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298 | async_serialize_start(); |
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299 | if (vfs_phone < 0) { |
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300 | res = vfs_connect(); |
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301 | if (res < 0) { |
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302 | async_serialize_end(); |
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303 | futex_up(&vfs_phone_futex); |
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304 | return res; |
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305 | } |
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306 | } |
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307 | req = async_send_1(vfs_phone, VFS_MKDIR, mode, &answer); |
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308 | rc = ipc_data_write_start(vfs_phone, path, strlen(path)); |
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309 | if (rc != EOK) { |
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310 | async_wait_for(req, NULL); |
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311 | async_serialize_end(); |
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312 | futex_up(&vfs_phone_futex); |
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313 | return (int) rc; |
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314 | } |
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315 | async_wait_for(req, &rc); |
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316 | async_serialize_end(); |
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317 | futex_up(&vfs_phone_futex); |
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318 | return EOK; |
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2694 | jermar | 319 | } |
320 | |||
2671 | jermar | 321 | /** @} |
322 | */ |