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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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2674 | jermar | 36 | #include <unistd.h> |
37 | #include <fcntl.h> |
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2671 | jermar | 38 | #include <ipc/ipc.h> |
39 | #include <ipc/services.h> |
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40 | #include <async.h> |
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41 | #include <atomic.h> |
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42 | #include <futex.h> |
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43 | #include <errno.h> |
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44 | #include <string.h> |
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45 | #include "../../srv/vfs/vfs.h" |
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46 | |||
47 | int vfs_phone = -1; |
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48 | atomic_t vfs_phone_futex = FUTEX_INITIALIZER; |
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49 | |||
50 | static int vfs_connect(void) |
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51 | { |
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52 | if (vfs_phone < 0) |
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53 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
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54 | return vfs_phone; |
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55 | } |
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56 | |||
57 | int mount(const char *fs_name, const char *mp, const char *dev) |
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58 | { |
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59 | int res; |
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60 | ipcarg_t rc; |
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61 | aid_t req; |
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62 | |||
63 | int dev_handle = 0; /* TODO */ |
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64 | |||
65 | futex_down(&vfs_phone_futex); |
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66 | async_serialize_start(); |
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67 | if (vfs_phone < 0) { |
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68 | res = vfs_connect(); |
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69 | if (res < 0) { |
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70 | async_serialize_end(); |
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71 | futex_up(&vfs_phone_futex); |
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72 | return res; |
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73 | } |
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74 | } |
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75 | req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL); |
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2678 | jermar | 76 | rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name)); |
2671 | jermar | 77 | if (rc != EOK) { |
78 | async_wait_for(req, NULL); |
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79 | async_serialize_end(); |
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80 | futex_up(&vfs_phone_futex); |
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81 | return (int) rc; |
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82 | } |
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2678 | jermar | 83 | rc = ipc_data_write_start(vfs_phone, (void *)mp, strlen(mp)); |
2671 | jermar | 84 | if (rc != EOK) { |
85 | async_wait_for(req, NULL); |
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86 | async_serialize_end(); |
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87 | futex_up(&vfs_phone_futex); |
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88 | return (int) rc; |
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89 | } |
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90 | async_wait_for(req, &rc); |
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91 | async_serialize_end(); |
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92 | futex_up(&vfs_phone_futex); |
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93 | return (int) rc; |
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94 | } |
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95 | |||
96 | |||
2693 | jermar | 97 | int open(const char *path, int oflag, ...) |
2671 | jermar | 98 | { |
99 | int res; |
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100 | ipcarg_t rc; |
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101 | ipc_call_t answer; |
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102 | aid_t req; |
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103 | |||
104 | futex_down(&vfs_phone_futex); |
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105 | async_serialize_start(); |
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106 | if (vfs_phone < 0) { |
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107 | res = vfs_connect(); |
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108 | if (res < 0) { |
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109 | async_serialize_end(); |
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110 | futex_up(&vfs_phone_futex); |
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111 | return res; |
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112 | } |
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113 | } |
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114 | req = async_send_2(vfs_phone, VFS_OPEN, oflag, 0, &answer); |
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2693 | jermar | 115 | rc = ipc_data_write_start(vfs_phone, path, strlen(path)); |
2671 | jermar | 116 | if (rc != EOK) { |
117 | async_wait_for(req, NULL); |
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118 | async_serialize_end(); |
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119 | futex_up(&vfs_phone_futex); |
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120 | return (int) rc; |
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121 | } |
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122 | async_wait_for(req, &rc); |
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123 | async_serialize_end(); |
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124 | futex_up(&vfs_phone_futex); |
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125 | return (int) IPC_GET_ARG1(answer); |
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126 | } |
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127 | |||
128 | ssize_t read(int fildes, void *buf, size_t nbyte) |
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129 | { |
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130 | int res; |
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131 | ipcarg_t rc; |
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132 | ipc_call_t answer; |
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133 | aid_t req; |
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134 | |||
135 | futex_down(&vfs_phone_futex); |
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136 | async_serialize_start(); |
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137 | if (vfs_phone < 0) { |
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138 | res = vfs_connect(); |
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139 | if (res < 0) { |
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140 | async_serialize_end(); |
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141 | futex_up(&vfs_phone_futex); |
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142 | return res; |
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143 | } |
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144 | } |
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2674 | jermar | 145 | req = async_send_1(vfs_phone, VFS_READ, fildes, &answer); |
2678 | jermar | 146 | if (ipc_data_read_start(vfs_phone, (void *)buf, nbyte) != EOK) { |
2671 | jermar | 147 | async_wait_for(req, NULL); |
148 | async_serialize_end(); |
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149 | futex_up(&vfs_phone_futex); |
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150 | return (ssize_t) rc; |
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151 | } |
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152 | async_wait_for(req, &rc); |
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153 | async_serialize_end(); |
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154 | futex_up(&vfs_phone_futex); |
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155 | return (ssize_t) IPC_GET_ARG1(answer); |
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156 | } |
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157 | |||
2674 | jermar | 158 | ssize_t write(int fildes, const void *buf, size_t nbyte) |
159 | { |
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160 | int res; |
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161 | ipcarg_t rc; |
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162 | ipc_call_t answer; |
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163 | aid_t req; |
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164 | |||
165 | futex_down(&vfs_phone_futex); |
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166 | async_serialize_start(); |
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167 | if (vfs_phone < 0) { |
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168 | res = vfs_connect(); |
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169 | if (res < 0) { |
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170 | async_serialize_end(); |
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171 | futex_up(&vfs_phone_futex); |
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172 | return res; |
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173 | } |
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174 | } |
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175 | req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer); |
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2678 | jermar | 176 | if (ipc_data_write_start(vfs_phone, (void *)buf, nbyte) != EOK) { |
2674 | jermar | 177 | async_wait_for(req, NULL); |
178 | async_serialize_end(); |
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179 | futex_up(&vfs_phone_futex); |
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180 | return (ssize_t) rc; |
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181 | } |
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182 | async_wait_for(req, &rc); |
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183 | async_serialize_end(); |
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184 | futex_up(&vfs_phone_futex); |
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185 | return (ssize_t) IPC_GET_ARG1(answer); |
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186 | } |
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2684 | jermar | 187 | |
188 | off_t lseek(int fildes, off_t offset, int whence) |
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189 | { |
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190 | int res; |
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191 | ipcarg_t rc; |
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192 | |||
193 | futex_down(&vfs_phone_futex); |
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194 | async_serialize_start(); |
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195 | if (vfs_phone < 0) { |
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196 | res = vfs_connect(); |
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197 | if (res < 0) { |
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198 | async_serialize_end(); |
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199 | futex_up(&vfs_phone_futex); |
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200 | return res; |
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201 | } |
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202 | } |
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203 | |||
204 | off_t newoffs; |
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205 | rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence, |
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206 | &newoffs); |
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207 | |||
208 | async_serialize_end(); |
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209 | futex_up(&vfs_phone_futex); |
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210 | |||
211 | if (rc != EOK) |
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212 | return (off_t) -1; |
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213 | |||
214 | return newoffs; |
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215 | } |
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216 | |||
2693 | jermar | 217 | int ftruncate(int fildes, off_t length) |
218 | { |
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219 | int res; |
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220 | ipcarg_t rc; |
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221 | |||
222 | futex_down(&vfs_phone_futex); |
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223 | async_serialize_start(); |
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224 | if (vfs_phone < 0) { |
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225 | res = vfs_connect(); |
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226 | if (res < 0) { |
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227 | async_serialize_end(); |
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228 | futex_up(&vfs_phone_futex); |
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229 | return res; |
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230 | } |
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231 | } |
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232 | rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length); |
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233 | async_serialize_end(); |
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234 | futex_up(&vfs_phone_futex); |
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235 | return (int) rc; |
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236 | } |
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237 | |||
2671 | jermar | 238 | /** @} |
239 | */ |