inode.c

linux0.11 version(301k)

<a name=L224 href="source/fs/inode.c#L224">224</a>         inode-&gt;i_count = 1;
<a name=L225 href="source/fs/inode.c#L225">225</a>         return inode;
<a name=L226 href="source/fs/inode.c#L226">226</a> }
<a name=L227 href="source/fs/inode.c#L227">227</a> 
<a name=L228 href="source/fs/inode.c#L228">228</a> struct <a href="ident?i=m_inode">m_inode</a> * <a href="ident?i=get_pipe_inode">get_pipe_inode</a>(void)
<a name=L229 href="source/fs/inode.c#L229">229</a> {
<a name=L230 href="source/fs/inode.c#L230">230</a>         struct <a href="ident?i=m_inode">m_inode</a> * inode;
<a name=L231 href="source/fs/inode.c#L231">231</a> 
<a name=L232 href="source/fs/inode.c#L232">232</a>         if (!(inode = <a href="ident?i=get_empty_inode">get_empty_inode</a>()))
<a name=L233 href="source/fs/inode.c#L233">233</a>                 return <a href="ident?i=NULL">NULL</a>;
<a name=L234 href="source/fs/inode.c#L234">234</a>         if (!(inode-&gt;i_size=<a href="ident?i=get_free_page">get_free_page</a>())) {
<a name=L235 href="source/fs/inode.c#L235">235</a>                 inode-&gt;i_count = 0;
<a name=L236 href="source/fs/inode.c#L236">236</a>                 return <a href="ident?i=NULL">NULL</a>;
<a name=L237 href="source/fs/inode.c#L237">237</a>         }
<a name=L238 href="source/fs/inode.c#L238">238</a>         inode-&gt;i_count = 2;     <b><i>/* sum of readers/writers */</i></b>
<a name=L239 href="source/fs/inode.c#L239">239</a>         <a href="ident?i=PIPE_HEAD">PIPE_HEAD</a>(*inode) = <a href="ident?i=PIPE_TAIL">PIPE_TAIL</a>(*inode) = 0;
<a name=L240 href="source/fs/inode.c#L240">240</a>         inode-&gt;i_pipe = 1;
<a name=L241 href="source/fs/inode.c#L241">241</a>         return inode;
<a name=L242 href="source/fs/inode.c#L242">242</a> }
<a name=L243 href="source/fs/inode.c#L243">243</a> 
<a name=L244 href="source/fs/inode.c#L244">244</a> struct <a href="ident?i=m_inode">m_inode</a> * <a href="ident?i=iget">iget</a>(int dev,int nr)
<a name=L245 href="source/fs/inode.c#L245">245</a> {
<a name=L246 href="source/fs/inode.c#L246">246</a>         struct <a href="ident?i=m_inode">m_inode</a> * inode, * empty;
<a name=L247 href="source/fs/inode.c#L247">247</a> 
<a name=L248 href="source/fs/inode.c#L248">248</a>         if (!dev)
<a name=L249 href="source/fs/inode.c#L249">249</a>                 <a href="ident?i=panic">panic</a>(<i>"iget with dev==0"</i>);
<a name=L250 href="source/fs/inode.c#L250">250</a>         empty = <a href="ident?i=get_empty_inode">get_empty_inode</a>();
<a name=L251 href="source/fs/inode.c#L251">251</a>         inode = <a href="ident?i=inode_table">inode_table</a>;
<a name=L252 href="source/fs/inode.c#L252">252</a>         while (inode &lt; <a href="ident?i=NR_INODE">NR_INODE</a>+<a href="ident?i=inode_table">inode_table</a>) {
<a name=L253 href="source/fs/inode.c#L253">253</a>                 if (inode-&gt;i_dev != dev || inode-&gt;i_num != nr) {
<a name=L254 href="source/fs/inode.c#L254">254</a>                         inode++;
<a name=L255 href="source/fs/inode.c#L255">255</a>                         continue;
<a name=L256 href="source/fs/inode.c#L256">256</a>                 }
<a name=L257 href="source/fs/inode.c#L257">257</a>                 <a href="ident?i=wait_on_inode">wait_on_inode</a>(inode);
<a name=L258 href="source/fs/inode.c#L258">258</a>                 if (inode-&gt;i_dev != dev || inode-&gt;i_num != nr) {
<a name=L259 href="source/fs/inode.c#L259">259</a>                         inode = <a href="ident?i=inode_table">inode_table</a>;
<a name=L260 href="source/fs/inode.c#L260">260</a>                         continue;
<a name=L261 href="source/fs/inode.c#L261">261</a>                 }
<a name=L262 href="source/fs/inode.c#L262">262</a>                 inode-&gt;i_count++;
<a name=L263 href="source/fs/inode.c#L263">263</a>                 if (inode-&gt;i_mount) {
<a name=L264 href="source/fs/inode.c#L264">264</a>                         int i;
<a name=L265 href="source/fs/inode.c#L265">265</a> 
<a name=L266 href="source/fs/inode.c#L266">266</a>                         for (i = 0 ; i&lt;<a href="ident?i=NR_SUPER">NR_SUPER</a> ; i++)
<a name=L267 href="source/fs/inode.c#L267">267</a>                                 if (<a href="ident?i=super_block">super_block</a>[i].s_imount==inode)
<a name=L268 href="source/fs/inode.c#L268">268</a>                                         break;
<a name=L269 href="source/fs/inode.c#L269">269</a>                         if (i &gt;= <a href="ident?i=NR_SUPER">NR_SUPER</a>) {
<a name=L270 href="source/fs/inode.c#L270">270</a>                                 <a href="ident?i=printk">printk</a>(<i>"Mounted inode hasn't got sb\n"</i>);
<a name=L271 href="source/fs/inode.c#L271">271</a>                                 if (empty)
<a name=L272 href="source/fs/inode.c#L272">272</a>                                         <a href="ident?i=iput">iput</a>(empty);
<a name=L273 href="source/fs/inode.c#L273">273</a>                                 return inode;
<a name=L274 href="source/fs/inode.c#L274">274</a>                         }
<a name=L275 href="source/fs/inode.c#L275">275</a>                         <a href="ident?i=iput">iput</a>(inode);
<a name=L276 href="source/fs/inode.c#L276">276</a>                         dev = <a href="ident?i=super_block">super_block</a>[i].s_dev;
<a name=L277 href="source/fs/inode.c#L277">277</a>                         nr = <a href="ident?i=ROOT_INO">ROOT_INO</a>;
<a name=L278 href="source/fs/inode.c#L278">278</a>                         inode = <a href="ident?i=inode_table">inode_table</a>;
<a name=L279 href="source/fs/inode.c#L279">279</a>                         continue;
<a name=L280 href="source/fs/inode.c#L280">280</a>                 }
<a name=L281 href="source/fs/inode.c#L281">281</a>                 if (empty)
<a name=L282 href="source/fs/inode.c#L282">282</a>                         <a href="ident?i=iput">iput</a>(empty);
<a name=L283 href="source/fs/inode.c#L283">283</a>                 return inode;
<a name=L284 href="source/fs/inode.c#L284">284</a>         }
<a name=L285 href="source/fs/inode.c#L285">285</a>         if (!empty)
<a name=L286 href="source/fs/inode.c#L286">286</a>                 return (<a href="ident?i=NULL">NULL</a>);
<a name=L287 href="source/fs/inode.c#L287">287</a>         inode=empty;
<a name=L288 href="source/fs/inode.c#L288">288</a>         inode-&gt;i_dev = dev;
<a name=L289 href="source/fs/inode.c#L289">289</a>         inode-&gt;i_num = nr;
<a name=L290 href="source/fs/inode.c#L290">290</a>         <a href="ident?i=read_inode">read_inode</a>(inode);
<a name=L291 href="source/fs/inode.c#L291">291</a>         return inode;
<a name=L292 href="source/fs/inode.c#L292">292</a> }
<a name=L293 href="source/fs/inode.c#L293">293</a> 
<a name=L294 href="source/fs/inode.c#L294">294</a> static void <a href="ident?i=read_inode">read_inode</a>(struct <a href="ident?i=m_inode">m_inode</a> * inode)
<a name=L295 href="source/fs/inode.c#L295">295</a> {
<a name=L296 href="source/fs/inode.c#L296">296</a>         struct <a href="ident?i=super_block">super_block</a> * sb;
<a name=L297 href="source/fs/inode.c#L297">297</a>         struct <a href="ident?i=buffer_head">buffer_head</a> * bh;
<a name=L298 href="source/fs/inode.c#L298">298</a>         int block;
<a name=L299 href="source/fs/inode.c#L299">299</a> 
<a name=L300 href="source/fs/inode.c#L300">300</a>         <a href="ident?i=lock_inode">lock_inode</a>(inode);
<a name=L301 href="source/fs/inode.c#L301">301</a>         if (!(sb=<a href="ident?i=get_super">get_super</a>(inode-&gt;i_dev)))
<a name=L302 href="source/fs/inode.c#L302">302</a>                 <a href="ident?i=panic">panic</a>(<i>"trying to read inode without dev"</i>);
<a name=L303 href="source/fs/inode.c#L303">303</a>         block = 2 + sb-&gt;s_imap_blocks + sb-&gt;s_zmap_blocks +
<a name=L304 href="source/fs/inode.c#L304">304</a>                 (inode-&gt;i_num-1)/<a href="ident?i=INODES_PER_BLOCK">INODES_PER_BLOCK</a>;
<a name=L305 href="source/fs/inode.c#L305">305</a>         if (!(bh=<a href="ident?i=bread">bread</a>(inode-&gt;i_dev,block)))
<a name=L306 href="source/fs/inode.c#L306">306</a>                 <a href="ident?i=panic">panic</a>(<i>"unable to read i-node block"</i>);
<a name=L307 href="source/fs/inode.c#L307">307</a>         *(struct <a href="ident?i=d_inode">d_inode</a> *)inode =
<a name=L308 href="source/fs/inode.c#L308">308</a>                 ((struct <a href="ident?i=d_inode">d_inode</a> *)bh-&gt;b_data)
<a name=L309 href="source/fs/inode.c#L309">309</a>                         [(inode-&gt;i_num-1)%<a href="ident?i=INODES_PER_BLOCK">INODES_PER_BLOCK</a>];
<a name=L310 href="source/fs/inode.c#L310">310</a>         <a href="ident?i=brelse">brelse</a>(bh);
<a name=L311 href="source/fs/inode.c#L311">311</a>         <a href="ident?i=unlock_inode">unlock_inode</a>(inode);
<a name=L312 href="source/fs/inode.c#L312">312</a> }
<a name=L313 href="source/fs/inode.c#L313">313</a> 
<a name=L314 href="source/fs/inode.c#L314">314</a> static void <a href="ident?i=write_inode">write_inode</a>(struct <a href="ident?i=m_inode">m_inode</a> * inode)
<a name=L315 href="source/fs/inode.c#L315">315</a> {
<a name=L316 href="source/fs/inode.c#L316">316</a>         struct <a href="ident?i=super_block">super_block</a> * sb;
<a name=L317 href="source/fs/inode.c#L317">317</a>         struct <a href="ident?i=buffer_head">buffer_head</a> * bh;
<a name=L318 href="source/fs/inode.c#L318">318</a>         int block;
<a name=L319 href="source/fs/inode.c#L319">319</a> 
<a name=L320 href="source/fs/inode.c#L320">320</a>         <a href="ident?i=lock_inode">lock_inode</a>(inode);
<a name=L321 href="source/fs/inode.c#L321">321</a>         if (!inode-&gt;i_dirt || !inode-&gt;i_dev) {
<a name=L322 href="source/fs/inode.c#L322">322</a>                 <a href="ident?i=unlock_inode">unlock_inode</a>(inode);
<a name=L323 href="source/fs/inode.c#L323">323</a>                 return;
<a name=L324 href="source/fs/inode.c#L324">324</a>         }
<a name=L325 href="source/fs/inode.c#L325">325</a>         if (!(sb=<a href="ident?i=get_super">get_super</a>(inode-&gt;i_dev)))
<a name=L326 href="source/fs/inode.c#L326">326</a>                 <a href="ident?i=panic">panic</a>(<i>"trying to write inode without device"</i>);
<a name=L327 href="source/fs/inode.c#L327">327</a>         block = 2 + sb-&gt;s_imap_blocks + sb-&gt;s_zmap_blocks +
<a name=L328 href="source/fs/inode.c#L328">328</a>                 (inode-&gt;i_num-1)/<a href="ident?i=INODES_PER_BLOCK">INODES_PER_BLOCK</a>;
<a name=L329 href="source/fs/inode.c#L329">329</a>         if (!(bh=<a href="ident?i=bread">bread</a>(inode-&gt;i_dev,block)))
<a name=L330 href="source/fs/inode.c#L330">330</a>                 <a href="ident?i=panic">panic</a>(<i>"unable to read i-node block"</i>);
<a name=L331 href="source/fs/inode.c#L331">331</a>         ((struct <a href="ident?i=d_inode">d_inode</a> *)bh-&gt;b_data)
<a name=L332 href="source/fs/inode.c#L332">332</a>                 [(inode-&gt;i_num-1)%<a href="ident?i=INODES_PER_BLOCK">INODES_PER_BLOCK</a>] =
<a name=L333 href="source/fs/inode.c#L333">333</a>                         *(struct <a href="ident?i=d_inode">d_inode</a> *)inode;
<a name=L334 href="source/fs/inode.c#L334">334</a>         bh-&gt;b_dirt=1;
<a name=L335 href="source/fs/inode.c#L335">335</a>         inode-&gt;i_dirt=0;
<a name=L336 href="source/fs/inode.c#L336">336</a>         <a href="ident?i=brelse">brelse</a>(bh);
<a name=L337 href="source/fs/inode.c#L337">337</a>         <a href="ident?i=unlock_inode">unlock_inode</a>(inode);
<a name=L338 href="source/fs/inode.c#L338">338</a> }
<a name=L339 href="source/fs/inode.c#L339">339</a> </pre><hr>
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