inode.c

linux0.11 version(301k)

 <a name=L97 href="source/fs/inode.c#L97">97</a>                         return 0;
 <a name=L98 href="source/fs/inode.c#L98">98</a>                 if (!(bh = <a href="ident?i=bread">bread</a>(inode-&gt;i_dev,inode-&gt;i_zone[7])))
 <a name=L99 href="source/fs/inode.c#L99">99</a>                         return 0;
<a name=L100 href="source/fs/inode.c#L100">100</a>                 i = ((unsigned short *) (bh-&gt;b_data))[block];
<a name=L101 href="source/fs/inode.c#L101">101</a>                 if (create &amp;&amp; !i)
<a name=L102 href="source/fs/inode.c#L102">102</a>                         if (i=<a href="ident?i=new_block">new_block</a>(inode-&gt;i_dev)) {
<a name=L103 href="source/fs/inode.c#L103">103</a>                                 ((unsigned short *) (bh-&gt;b_data))[block]=i;
<a name=L104 href="source/fs/inode.c#L104">104</a>                                 bh-&gt;b_dirt=1;
<a name=L105 href="source/fs/inode.c#L105">105</a>                         }
<a name=L106 href="source/fs/inode.c#L106">106</a>                 <a href="ident?i=brelse">brelse</a>(bh);
<a name=L107 href="source/fs/inode.c#L107">107</a>                 return i;
<a name=L108 href="source/fs/inode.c#L108">108</a>         }
<a name=L109 href="source/fs/inode.c#L109">109</a>         block -= 512;
<a name=L110 href="source/fs/inode.c#L110">110</a>         if (create &amp;&amp; !inode-&gt;i_zone[8])
<a name=L111 href="source/fs/inode.c#L111">111</a>                 if (inode-&gt;i_zone[8]=<a href="ident?i=new_block">new_block</a>(inode-&gt;i_dev)) {
<a name=L112 href="source/fs/inode.c#L112">112</a>                         inode-&gt;i_dirt=1;
<a name=L113 href="source/fs/inode.c#L113">113</a>                         inode-&gt;i_ctime=<a href="ident?i=CURRENT_TIME">CURRENT_TIME</a>;
<a name=L114 href="source/fs/inode.c#L114">114</a>                 }
<a name=L115 href="source/fs/inode.c#L115">115</a>         if (!inode-&gt;i_zone[8])
<a name=L116 href="source/fs/inode.c#L116">116</a>                 return 0;
<a name=L117 href="source/fs/inode.c#L117">117</a>         if (!(bh=<a href="ident?i=bread">bread</a>(inode-&gt;i_dev,inode-&gt;i_zone[8])))
<a name=L118 href="source/fs/inode.c#L118">118</a>                 return 0;
<a name=L119 href="source/fs/inode.c#L119">119</a>         i = ((unsigned short *)bh-&gt;b_data)[block&gt;&gt;9];
<a name=L120 href="source/fs/inode.c#L120">120</a>         if (create &amp;&amp; !i)
<a name=L121 href="source/fs/inode.c#L121">121</a>                 if (i=<a href="ident?i=new_block">new_block</a>(inode-&gt;i_dev)) {
<a name=L122 href="source/fs/inode.c#L122">122</a>                         ((unsigned short *) (bh-&gt;b_data))[block&gt;&gt;9]=i;
<a name=L123 href="source/fs/inode.c#L123">123</a>                         bh-&gt;b_dirt=1;
<a name=L124 href="source/fs/inode.c#L124">124</a>                 }
<a name=L125 href="source/fs/inode.c#L125">125</a>         <a href="ident?i=brelse">brelse</a>(bh);
<a name=L126 href="source/fs/inode.c#L126">126</a>         if (!i)
<a name=L127 href="source/fs/inode.c#L127">127</a>                 return 0;
<a name=L128 href="source/fs/inode.c#L128">128</a>         if (!(bh=<a href="ident?i=bread">bread</a>(inode-&gt;i_dev,i)))
<a name=L129 href="source/fs/inode.c#L129">129</a>                 return 0;
<a name=L130 href="source/fs/inode.c#L130">130</a>         i = ((unsigned short *)bh-&gt;b_data)[block&amp;511];
<a name=L131 href="source/fs/inode.c#L131">131</a>         if (create &amp;&amp; !i)
<a name=L132 href="source/fs/inode.c#L132">132</a>                 if (i=<a href="ident?i=new_block">new_block</a>(inode-&gt;i_dev)) {
<a name=L133 href="source/fs/inode.c#L133">133</a>                         ((unsigned short *) (bh-&gt;b_data))[block&amp;511]=i;
<a name=L134 href="source/fs/inode.c#L134">134</a>                         bh-&gt;b_dirt=1;
<a name=L135 href="source/fs/inode.c#L135">135</a>                 }
<a name=L136 href="source/fs/inode.c#L136">136</a>         <a href="ident?i=brelse">brelse</a>(bh);
<a name=L137 href="source/fs/inode.c#L137">137</a>         return i;
<a name=L138 href="source/fs/inode.c#L138">138</a> }
<a name=L139 href="source/fs/inode.c#L139">139</a> 
<a name=L140 href="source/fs/inode.c#L140">140</a> int <a href="ident?i=bmap">bmap</a>(struct <a href="ident?i=m_inode">m_inode</a> * inode,int block)
<a name=L141 href="source/fs/inode.c#L141">141</a> {
<a name=L142 href="source/fs/inode.c#L142">142</a>         return <a href="ident?i=_bmap">_bmap</a>(inode,block,0);
<a name=L143 href="source/fs/inode.c#L143">143</a> }
<a name=L144 href="source/fs/inode.c#L144">144</a> 
<a name=L145 href="source/fs/inode.c#L145">145</a> int <a href="ident?i=create_block">create_block</a>(struct <a href="ident?i=m_inode">m_inode</a> * inode, int block)
<a name=L146 href="source/fs/inode.c#L146">146</a> {
<a name=L147 href="source/fs/inode.c#L147">147</a>         return <a href="ident?i=_bmap">_bmap</a>(inode,block,1);
<a name=L148 href="source/fs/inode.c#L148">148</a> }
<a name=L149 href="source/fs/inode.c#L149">149</a>                 
<a name=L150 href="source/fs/inode.c#L150">150</a> void <a href="ident?i=iput">iput</a>(struct <a href="ident?i=m_inode">m_inode</a> * inode)
<a name=L151 href="source/fs/inode.c#L151">151</a> {
<a name=L152 href="source/fs/inode.c#L152">152</a>         if (!inode)
<a name=L153 href="source/fs/inode.c#L153">153</a>                 return;
<a name=L154 href="source/fs/inode.c#L154">154</a>         <a href="ident?i=wait_on_inode">wait_on_inode</a>(inode);
<a name=L155 href="source/fs/inode.c#L155">155</a>         if (!inode-&gt;i_count)
<a name=L156 href="source/fs/inode.c#L156">156</a>                 <a href="ident?i=panic">panic</a>(<i>"iput: trying to free free inode"</i>);
<a name=L157 href="source/fs/inode.c#L157">157</a>         if (inode-&gt;i_pipe) {
<a name=L158 href="source/fs/inode.c#L158">158</a>                 <a href="ident?i=wake_up">wake_up</a>(&amp;inode-&gt;i_wait);
<a name=L159 href="source/fs/inode.c#L159">159</a>                 if (--inode-&gt;i_count)
<a name=L160 href="source/fs/inode.c#L160">160</a>                         return;
<a name=L161 href="source/fs/inode.c#L161">161</a>                 <a href="ident?i=free_page">free_page</a>(inode-&gt;i_size);
<a name=L162 href="source/fs/inode.c#L162">162</a>                 inode-&gt;i_count=0;
<a name=L163 href="source/fs/inode.c#L163">163</a>                 inode-&gt;i_dirt=0;
<a name=L164 href="source/fs/inode.c#L164">164</a>                 inode-&gt;i_pipe=0;
<a name=L165 href="source/fs/inode.c#L165">165</a>                 return;
<a name=L166 href="source/fs/inode.c#L166">166</a>         }
<a name=L167 href="source/fs/inode.c#L167">167</a>         if (!inode-&gt;i_dev) {
<a name=L168 href="source/fs/inode.c#L168">168</a>                 inode-&gt;i_count--;
<a name=L169 href="source/fs/inode.c#L169">169</a>                 return;
<a name=L170 href="source/fs/inode.c#L170">170</a>         }
<a name=L171 href="source/fs/inode.c#L171">171</a>         if (<a href="ident?i=S_ISBLK">S_ISBLK</a>(inode-&gt;i_mode)) {
<a name=L172 href="source/fs/inode.c#L172">172</a>                 <a href="ident?i=sync_dev">sync_dev</a>(inode-&gt;i_zone[0]);
<a name=L173 href="source/fs/inode.c#L173">173</a>                 <a href="ident?i=wait_on_inode">wait_on_inode</a>(inode);
<a name=L174 href="source/fs/inode.c#L174">174</a>         }
<a name=L175 href="source/fs/inode.c#L175">175</a> repeat:
<a name=L176 href="source/fs/inode.c#L176">176</a>         if (inode-&gt;i_count&gt;1) {
<a name=L177 href="source/fs/inode.c#L177">177</a>                 inode-&gt;i_count--;
<a name=L178 href="source/fs/inode.c#L178">178</a>                 return;
<a name=L179 href="source/fs/inode.c#L179">179</a>         }
<a name=L180 href="source/fs/inode.c#L180">180</a>         if (!inode-&gt;i_nlinks) {
<a name=L181 href="source/fs/inode.c#L181">181</a>                 <a href="ident?i=truncate">truncate</a>(inode);
<a name=L182 href="source/fs/inode.c#L182">182</a>                 <a href="ident?i=free_inode">free_inode</a>(inode);
<a name=L183 href="source/fs/inode.c#L183">183</a>                 return;
<a name=L184 href="source/fs/inode.c#L184">184</a>         }
<a name=L185 href="source/fs/inode.c#L185">185</a>         if (inode-&gt;i_dirt) {
<a name=L186 href="source/fs/inode.c#L186">186</a>                 <a href="ident?i=write_inode">write_inode</a>(inode);     <b><i>/* we can sleep - so do again */</i></b>
<a name=L187 href="source/fs/inode.c#L187">187</a>                 <a href="ident?i=wait_on_inode">wait_on_inode</a>(inode);
<a name=L188 href="source/fs/inode.c#L188">188</a>                 goto repeat;
<a name=L189 href="source/fs/inode.c#L189">189</a>         }
<a name=L190 href="source/fs/inode.c#L190">190</a>         inode-&gt;i_count--;
<a name=L191 href="source/fs/inode.c#L191">191</a>         return;
<a name=L192 href="source/fs/inode.c#L192">192</a> }
<a name=L193 href="source/fs/inode.c#L193">193</a> 
<a name=L194 href="source/fs/inode.c#L194">194</a> struct <a href="ident?i=m_inode">m_inode</a> * <a href="ident?i=get_empty_inode">get_empty_inode</a>(void)
<a name=L195 href="source/fs/inode.c#L195">195</a> {
<a name=L196 href="source/fs/inode.c#L196">196</a>         struct <a href="ident?i=m_inode">m_inode</a> * inode;
<a name=L197 href="source/fs/inode.c#L197">197</a>         static struct <a href="ident?i=m_inode">m_inode</a> * last_inode = <a href="ident?i=inode_table">inode_table</a>;
<a name=L198 href="source/fs/inode.c#L198">198</a>         int i;
<a name=L199 href="source/fs/inode.c#L199">199</a> 
<a name=L200 href="source/fs/inode.c#L200">200</a>         do {
<a name=L201 href="source/fs/inode.c#L201">201</a>                 inode = <a href="ident?i=NULL">NULL</a>;
<a name=L202 href="source/fs/inode.c#L202">202</a>                 for (i = <a href="ident?i=NR_INODE">NR_INODE</a>; i ; i--) {
<a name=L203 href="source/fs/inode.c#L203">203</a>                         if (++last_inode &gt;= <a href="ident?i=inode_table">inode_table</a> + <a href="ident?i=NR_INODE">NR_INODE</a>)
<a name=L204 href="source/fs/inode.c#L204">204</a>                                 last_inode = <a href="ident?i=inode_table">inode_table</a>;
<a name=L205 href="source/fs/inode.c#L205">205</a>                         if (!last_inode-&gt;i_count) {
<a name=L206 href="source/fs/inode.c#L206">206</a>                                 inode = last_inode;
<a name=L207 href="source/fs/inode.c#L207">207</a>                                 if (!inode-&gt;i_dirt &amp;&amp; !inode-&gt;i_lock)
<a name=L208 href="source/fs/inode.c#L208">208</a>                                         break;
<a name=L209 href="source/fs/inode.c#L209">209</a>                         }
<a name=L210 href="source/fs/inode.c#L210">210</a>                 }
<a name=L211 href="source/fs/inode.c#L211">211</a>                 if (!inode) {
<a name=L212 href="source/fs/inode.c#L212">212</a>                         for (i=0 ; i&lt;<a href="ident?i=NR_INODE">NR_INODE</a> ; i++)
<a name=L213 href="source/fs/inode.c#L213">213</a>                                 <a href="ident?i=printk">printk</a>(<i>"%04x: %6d\t"</i>,<a href="ident?i=inode_table">inode_table</a>[i].i_dev,
<a name=L214 href="source/fs/inode.c#L214">214</a>                                         <a href="ident?i=inode_table">inode_table</a>[i].i_num);
<a name=L215 href="source/fs/inode.c#L215">215</a>                         <a href="ident?i=panic">panic</a>(<i>"No free inodes in mem"</i>);
<a name=L216 href="source/fs/inode.c#L216">216</a>                 }
<a name=L217 href="source/fs/inode.c#L217">217</a>                 <a href="ident?i=wait_on_inode">wait_on_inode</a>(inode);
<a name=L218 href="source/fs/inode.c#L218">218</a>                 while (inode-&gt;i_dirt) {
<a name=L219 href="source/fs/inode.c#L219">219</a>                         <a href="ident?i=write_inode">write_inode</a>(inode);
<a name=L220 href="source/fs/inode.c#L220">220</a>                         <a href="ident?i=wait_on_inode">wait_on_inode</a>(inode);
<a name=L221 href="source/fs/inode.c#L221">221</a>                 }
<a name=L222 href="source/fs/inode.c#L222">222</a>         } while (inode-&gt;i_count);
<a name=L223 href="source/fs/inode.c#L223">223</a>         <a href="ident?i=memset">memset</a>(inode,0,sizeof(*inode));