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ZealOS/docs/Kernel/BlkDev/DiskBlkDev.CC.html
TomAwezome a0f20b1dba Implement AHCIAtapiModeWriteSet.
2021-08-09 02:04:03 -04:00

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<a name="l1"></a><span class=cF1>Bool</span><span class=cF0> </span><span class=cF5>BlkDevLock</span><span class=cF0>(</span><span class=cF9>CBlkDev</span><span class=cF0> *bd)
<a name="l2"></a>{</span><span class=cF2>//Make this task have exclusive access to BlkDev.</span><span class=cF0>
<a name="l3"></a> </span><span class=cF5>BlkDevCheck</span><span class=cF0>(bd);
<a name="l4"></a>
<a name="l5"></a> </span><span class=cF1>while</span><span class=cF0> (bd-&gt;lock_fwding)
<a name="l6"></a> bd = bd-&gt;lock_fwding; </span><span class=cF2>//If two blkdevs on same controller, use just one lock</span><span class=cF0>
<a name="l7"></a>
<a name="l8"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF5>Bt</span><span class=cF7>(</span><span class=cF0>&amp;bd-&gt;locked_flags, </span><span class=cF3>BDlf_LOCKED</span><span class=cF7>)</span><span class=cF0> || bd-&gt;owning_task != </span><span class=cF5>Fs</span><span class=cF0>)
<a name="l9"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l10"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF5>LBts</span><span class=cF7>(</span><span class=cF0>&amp;bd-&gt;locked_flags, </span><span class=cF3>BDlf_LOCKED</span><span class=cF7>)</span><span class=cF0>)
<a name="l11"></a> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l12"></a>
<a name="l13"></a> bd-&gt;owning_task = </span><span class=cF5>Fs</span><span class=cF0>;
<a name="l14"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l15"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l16"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l17"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l18"></a>}
<a name="l19"></a>
<a name="l20"></a></span><span class=cF1>Bool</span><span class=cF0> </span><span class=cF5>BlkDevUnlock</span><span class=cF0>(</span><span class=cF9>CBlkDev</span><span class=cF0> *bd, </span><span class=cF1>Bool</span><span class=cF0> reset=</span><span class=cF3>FALSE</span><span class=cF0>)
<a name="l21"></a>{</span><span class=cF2>//Release exclusive lock on access to BlkDev.</span><span class=cF0>
<a name="l22"></a> </span><span class=cF5>BlkDevCheck</span><span class=cF0>(bd);
<a name="l23"></a>
<a name="l24"></a> </span><span class=cF1>while</span><span class=cF0> (bd-&gt;lock_fwding)
<a name="l25"></a> bd = bd-&gt;lock_fwding; </span><span class=cF2>//If two blkdevs on same controller, use just one lock</span><span class=cF0>
<a name="l26"></a>
<a name="l27"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>Bt</span><span class=cF7>(</span><span class=cF0>&amp;bd-&gt;locked_flags, </span><span class=cF3>BDlf_LOCKED</span><span class=cF7>)</span><span class=cF0> &amp;&amp; bd-&gt;owning_task == </span><span class=cF5>Fs</span><span class=cF0>)
<a name="l28"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l29"></a> </span><span class=cF1>if</span><span class=cF0> (reset)
<a name="l30"></a> bd-&gt;flags &amp;= ~(</span><span class=cF3>BDF_INITIALIZED</span><span class=cF0> | </span><span class=cF3>BDF_INIT_IN_PROGRESS</span><span class=cF0>);
<a name="l31"></a> bd-&gt;owning_task = </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l32"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;bd-&gt;locked_flags, </span><span class=cF3>BDlf_LOCKED</span><span class=cF0>);
<a name="l33"></a> </span><span class=cF5>Yield</span><span class=cF0>; </span><span class=cF2>//Prevent deadlock</span><span class=cF0>
<a name="l34"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l35"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l36"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l37"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l38"></a>}
<a name="l39"></a>
<a name="l40"></a></span><span class=cF1>Bool</span><span class=cF0> </span><span class=cFD>BlkDevInit</span><span class=cF0>(</span><span class=cF9>CBlkDev</span><span class=cF0> *bd)
<a name="l41"></a>{
<a name="l42"></a> </span><span class=cF9>CDirEntry</span><span class=cF0> de;
<a name="l43"></a> </span><span class=cF1>U8</span><span class=cF0> buf[</span><span class=cF3>STR_LEN</span><span class=cF0>];
<a name="l44"></a> </span><span class=cF9>CDrive</span><span class=cF0> *drive = </span><span class=cF5>Letter2Drive</span><span class=cF0>(bd-&gt;first_drive_let);
<a name="l45"></a> </span><span class=cF1>Bool</span><span class=cF0> res = </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l46"></a>
<a name="l47"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF5>LBts</span><span class=cF7>(</span><span class=cF0>&amp;bd-&gt;flags, </span><span class=cF3>BDf_INITIALIZED</span><span class=cF7>)</span><span class=cF0>)
<a name="l48"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l49"></a> bd-&gt;flags |= </span><span class=cF3>BDF_INIT_IN_PROGRESS</span><span class=cF0>;
<a name="l50"></a> </span><span class=cF1>switch</span><span class=cF0> (bd-&gt;type)
<a name="l51"></a> {
<a name="l52"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_RAM</span><span class=cF0>:
<a name="l53"></a> </span><span class=cF1>if</span><span class=cF0> (!bd-&gt;RAM_disk)
<a name="l54"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l55"></a> bd-&gt;RAM_disk = </span><span class=cF5>SysMAlloc</span><span class=cF0>(</span><span class=cF7>(</span><span class=cF0>bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF7>)</span><span class=cF0> &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l56"></a> bd-&gt;max_blk = </span><span class=cF5>MSize</span><span class=cF0>(bd-&gt;RAM_disk) &gt;&gt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
<a name="l57"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l58"></a> drive-&gt;fs_type = </span><span class=cF3>FSt_REDSEA</span><span class=cF0>;
<a name="l59"></a> drive-&gt;size = bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0> - bd-&gt;drv_offset;
<a name="l60"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFD>RedSeaValidate</span><span class=cF7>(</span><span class=cF0>bd-&gt;first_drive_let</span><span class=cF7>)</span><span class=cF0>)
<a name="l61"></a> </span><span class=cFD>RedSeaInit</span><span class=cF0>(drive);
<a name="l62"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l63"></a> </span><span class=cFD>RedSeaFormat</span><span class=cF0>(bd-&gt;first_drive_let);
<a name="l64"></a> res = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l65"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l66"></a>
<a name="l67"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_READ</span><span class=cF0>:
<a name="l68"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>FileFind</span><span class=cF7>(</span><span class=cF0>bd-&gt;file_disk_name, &amp;de, </span><span class=cF3>FUF_JUST_FILES</span><span class=cF7>)</span><span class=cF0>)
<a name="l69"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l70"></a> bd-&gt;max_blk = de.size &gt;&gt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
<a name="l71"></a> </span><span class=cF1>try</span><span class=cF0>
<a name="l72"></a> bd-&gt;file_disk = </span><span class=cF5>FOpen</span><span class=cF0>(bd-&gt;file_disk_name, </span><span class=cF6>&quot;rc&quot;</span><span class=cF0>, bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0>);
<a name="l73"></a> </span><span class=cF1>catch</span><span class=cF0>
<a name="l74"></a> {
<a name="l75"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>Fs</span><span class=cF0>-&gt;except_ch == </span><span class=cF6>'File'</span><span class=cF0>)
<a name="l76"></a> </span><span class=cF5>PrintErr</span><span class=cF0>(</span><span class=cF6>&quot;Not Contiguous. Move file to filename.ISO.C.\n&quot;</span><span class=cF0>);
<a name="l77"></a> </span><span class=cF5>Fs</span><span class=cF0>-&gt;catch_except = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l78"></a> }
<a name="l79"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;file_disk)
<a name="l80"></a> {
<a name="l81"></a> drive-&gt;fs_type = </span><span class=cF3>FSt_REDSEA</span><span class=cF0>;
<a name="l82"></a> drive-&gt;size = bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0> - bd-&gt;drv_offset;
<a name="l83"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFD>RedSeaValidate</span><span class=cF7>(</span><span class=cF0>bd-&gt;first_drive_let</span><span class=cF7>)</span><span class=cF0>)
<a name="l84"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l85"></a> </span><span class=cFD>RedSeaInit</span><span class=cF0>(drive);
<a name="l86"></a> res = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l87"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l88"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l89"></a> </span><span class=cF5>PrintErr</span><span class=cF0>(</span><span class=cF6>&quot;Not RedSea\n&quot;</span><span class=cF0>);
<a name="l90"></a> }
<a name="l91"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l92"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l93"></a>
<a name="l94"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_WRITE</span><span class=cF0>:
<a name="l95"></a> </span><span class=cF1>if</span><span class=cF0> (!bd-&gt;file_disk_name)
<a name="l96"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l97"></a> </span><span class=cF5>StrPrint</span><span class=cF0>(buf, </span><span class=cF6>&quot;%C:/Drive%C.ISO.C&quot;</span><span class=cF0>, </span><span class=cFB>blkdev</span><span class=cF0>.boot_drive_let, bd-&gt;first_drive_let);
<a name="l98"></a> bd-&gt;file_disk_name = </span><span class=cF5>SysStrNew</span><span class=cF0>(buf);
<a name="l99"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l100"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;max_blk &lt; </span><span class=cFE>7</span><span class=cF0>)
<a name="l101"></a> bd-&gt;max_blk = </span><span class=cFE>7</span><span class=cF0>;
<a name="l102"></a> bd-&gt;file_disk = </span><span class=cF5>FOpen</span><span class=cF0>(bd-&gt;file_disk_name, </span><span class=cF6>&quot;wc&quot;</span><span class=cF0>, bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0>);
<a name="l103"></a> drive-&gt;fs_type = </span><span class=cF3>FSt_REDSEA</span><span class=cF0>;
<a name="l104"></a> drive-&gt;size = bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0> - bd-&gt;drv_offset;
<a name="l105"></a> </span><span class=cFD>RedSeaFormat</span><span class=cF0>(bd-&gt;first_drive_let);
<a name="l106"></a> </span><span class=cF5>CallExtStr</span><span class=cF0>(</span><span class=cF6>&quot;RedSeaISO9660&quot;</span><span class=cF0>, bd-&gt;file_disk_name, bd-&gt;first_drive_let);
<a name="l107"></a> res = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l108"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l109"></a>
<a name="l110"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATA</span><span class=cF0>:
<a name="l111"></a> bd-&gt;max_reads = </span><span class=cFE>128</span><span class=cF0>;
<a name="l112"></a> bd-&gt;max_writes = </span><span class=cFE>1</span><span class=cF0>;
<a name="l113"></a> res = </span><span class=cFD>AHCIAtaInit</span><span class=cF0>(bd);
<a name="l114"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l115"></a>
<a name="l116"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATAPI</span><span class=cF0>:
<a name="l117"></a></span><span class=cF2>//0xFFFF*4 is too big for Terry's taste</span><span class=cF0>
<a name="l118"></a> bd-&gt;max_reads = </span><span class=cFE>0x800</span><span class=cF0> * </span><span class=cFE>4</span><span class=cF0>;
<a name="l119"></a></span><span class=cF2>//max of maybe a quarter of disk cache</span><span class=cF0>
<a name="l120"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;max_reads &gt; </span><span class=cFB>blkdev</span><span class=cF0>.cache_size / </span><span class=cF3>BLK_SIZE</span><span class=cF0> / </span><span class=cFE>4</span><span class=cF0>)
<a name="l121"></a> bd-&gt;max_reads = </span><span class=cFB>blkdev</span><span class=cF0>.cache_size / </span><span class=cF3>BLK_SIZE</span><span class=cF0> / </span><span class=cFE>4</span><span class=cF0> &amp; ~</span><span class=cFE>3</span><span class=cF0>;
<a name="l122"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;max_reads &lt; </span><span class=cFE>128</span><span class=cF0>)
<a name="l123"></a> bd-&gt;max_reads = </span><span class=cFE>128</span><span class=cF0>;
<a name="l124"></a> bd-&gt;max_writes = </span><span class=cFE>0xFFFF</span><span class=cF0> * </span><span class=cFE>4</span><span class=cF0>;
<a name="l125"></a> </span><span class=cF1>if</span><span class=cF0> (res = </span><span class=cFD>AHCIAtaInit</span><span class=cF7>(</span><span class=cF0>bd</span><span class=cF7>)</span><span class=cF0>)
<a name="l126"></a> drive-&gt;size = bd-&gt;max_blk + </span><span class=cFE>1</span><span class=cF0>;
<a name="l127"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l128"></a> }
<a name="l129"></a> </span><span class=cF1>if</span><span class=cF0> (res &amp;&amp; bd-&gt;flags &amp; </span><span class=cF3>BDF_READ_CACHE</span><span class=cF0>)
<a name="l130"></a> </span><span class=cF5>DiskCacheInvalidate</span><span class=cF0>(drive);
<a name="l131"></a> bd-&gt;flags &amp;= ~</span><span class=cF3>BDF_INIT_IN_PROGRESS</span><span class=cF0>;
<a name="l132"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l133"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l134"></a> res = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l135"></a>
<a name="l136"></a> </span><span class=cF1>return</span><span class=cF0> res;
<a name="l137"></a>}
<a name="l138"></a>
<a name="l139"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>BlkDevsRelease</span><span class=cF0>()
<a name="l140"></a>{</span><span class=cF2>//When task dies, release all owned BlkDevs.</span><span class=cF0>
<a name="l141"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l142"></a> </span><span class=cF9>CBlkDev</span><span class=cF0> *bd;
<a name="l143"></a>
<a name="l144"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cF3>BLKDEVS_NUM</span><span class=cF0>; i++)
<a name="l145"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l146"></a> bd = &amp;</span><span class=cFB>blkdev</span><span class=cF0>.blkdevs[i];
<a name="l147"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;owning_task == </span><span class=cF5>Fs</span><span class=cF0> &amp;&amp; bd-&gt;bd_signature == </span><span class=cF3>BD_SIGNATURE_VAL</span><span class=cF0>)
<a name="l148"></a> </span><span class=cF5>BlkDevUnlock</span><span class=cF0>(bd, </span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l149"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l150"></a>}
<a name="l151"></a>
<a name="l152"></a></span><span class=cF9>CBlkDev</span><span class=cF0> *</span><span class=cF5>BlkDevNextFreeSlot</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> first_drive_let, </span><span class=cF9>I64</span><span class=cF0> type)
<a name="l153"></a>{</span><span class=cF2>//Locate free slot for new BlkDev, like during </span><a href="https://zeal-operating-system.github.io/ZealOS/System/BlkDev/Mount.CC.html#l301"><span class=cF4>Mount</span></a><span class=cF2>().</span><span class=cF0>
<a name="l154"></a> </span><span class=cF9>I64</span><span class=cF0> i = </span><span class=cFE>0</span><span class=cF0>;
<a name="l155"></a> </span><span class=cF9>CBlkDev</span><span class=cF0> *res;
<a name="l156"></a>
<a name="l157"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cF5>Letter2BlkDevType</span><span class=cF7>(</span><span class=cF0>first_drive_let</span><span class=cF7>)</span><span class=cF0> != type)
<a name="l158"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'BlkDev'</span><span class=cF0>);
<a name="l159"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l160"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l161"></a> res = &amp;</span><span class=cFB>blkdev</span><span class=cF0>.blkdevs[i];
<a name="l162"></a> </span><span class=cF1>if</span><span class=cF0> (res-&gt;bd_signature != </span><span class=cF3>BD_SIGNATURE_VAL</span><span class=cF0>)
<a name="l163"></a> {
<a name="l164"></a> </span><span class=cF5>MemSet</span><span class=cF0>(res, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CBlkDev</span><span class=cF7>)</span><span class=cF0>);
<a name="l165"></a> res-&gt;first_drive_let = first_drive_let;
<a name="l166"></a> res-&gt;type = type;
<a name="l167"></a> res-&gt;flags = </span><span class=cF3>BDF_READ_CACHE</span><span class=cF0>;
<a name="l168"></a> res-&gt;blk_size = </span><span class=cF3>BLK_SIZE</span><span class=cF0>;
<a name="l169"></a> res-&gt;max_blk = </span><span class=cFE>0xEFFFFFFF</span><span class=cF0>;
<a name="l170"></a> </span><span class=cF1>switch</span><span class=cF0> (type)
<a name="l171"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l172"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_RAM</span><span class=cF0>:
<a name="l173"></a> res-&gt;flags &amp;= ~</span><span class=cF3>BDF_READ_CACHE</span><span class=cF0>;
<a name="l174"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l175"></a>
<a name="l176"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_READ</span><span class=cF0>:
<a name="l177"></a> res-&gt;flags |= </span><span class=cF3>BDF_READ_ONLY</span><span class=cF0>;
<a name="l178"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l179"></a>
<a name="l180"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATAPI</span><span class=cF0>:
<a name="l181"></a> res-&gt;flags |= </span><span class=cF3>BDF_REMOVABLE</span><span class=cF0>|</span><span class=cF3>BDF_READ_ONLY</span><span class=cF0>;
<a name="l182"></a> res-&gt;blk_size = </span><span class=cF3>DVD_BLK_SIZE</span><span class=cF0>;
<a name="l183"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l184"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l185"></a> </span><span class=cF1>return</span><span class=cF0> res;
<a name="l186"></a> }
<a name="l187"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l188"></a> </span><span class=cF1>while</span><span class=cF0> (++i &lt; </span><span class=cF3>BLKDEVS_NUM</span><span class=cF0>);
<a name="l189"></a>
<a name="l190"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'BlkDev'</span><span class=cF0>);
<a name="l191"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>; </span><span class=cF2>//never gets here</span><span class=cF0>
<a name="l192"></a>}
<a name="l193"></a>
<a name="l194"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>BlkDevDel</span><span class=cF0>(</span><span class=cF9>CBlkDev</span><span class=cF0> *bd)
<a name="l195"></a>{</span><span class=cF2>//Delete BlkDev</span><span class=cF0>
<a name="l196"></a> </span><span class=cFD>DriveBlkDevDel</span><span class=cF0>(bd);
<a name="l197"></a> </span><span class=cF5>FClose</span><span class=cF0>(bd-&gt;file_disk);
<a name="l198"></a> </span><span class=cF5>Free</span><span class=cF0>(bd-&gt;file_disk_name);
<a name="l199"></a> </span><span class=cF5>Free</span><span class=cF0>(bd-&gt;dev_id_record);
<a name="l200"></a> </span><span class=cF5>MemSet</span><span class=cF0>(bd, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CBlkDev</span><span class=cF7>)</span><span class=cF0>);
<a name="l201"></a>}
<a name="l202"></a>
<a name="l203"></a></span><span class=cF9>CBlkDev</span><span class=cF0> *</span><span class=cF5>BlkDevCheck</span><span class=cF0>(</span><span class=cF9>CBlkDev</span><span class=cF0> *bd, </span><span class=cF1>Bool</span><span class=cF0> except=</span><span class=cF3>TRUE</span><span class=cF0>)
<a name="l204"></a>{</span><span class=cF2>//Check for valid BlkDev. Throw exception.</span><span class=cF0>
<a name="l205"></a> </span><span class=cF1>if</span><span class=cF0> (!bd || bd-&gt;bd_signature != </span><span class=cF3>BD_SIGNATURE_VAL</span><span class=cF0> || !</span><span class=cF7>(</span><span class=cF3>BDT_NULL</span><span class=cF0>&lt;bd-&gt;type &lt; </span><span class=cF3>BDT_TYPES_NUM</span><span class=cF7>)</span><span class=cF0>)
<a name="l206"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l207"></a> </span><span class=cF1>if</span><span class=cF0> (except)
<a name="l208"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'BlkDev'</span><span class=cF0>);
<a name="l209"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l210"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l211"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l212"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l213"></a> </span><span class=cF1>return</span><span class=cF0> bd;
<a name="l214"></a>}
<a name="l215"></a>
<a name="l216"></a></span><span class=cF9>CBlkDev</span><span class=cF0> *</span><span class=cF5>Letter2BlkDev</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> drv_let=</span><span class=cFE>0</span><span class=cF0>, </span><span class=cF1>Bool</span><span class=cF0> except=</span><span class=cF3>TRUE</span><span class=cF0>)
<a name="l217"></a>{</span><span class=cF2>//Drive letter to BlkDev ptr.</span><span class=cF0>
<a name="l218"></a> </span><span class=cF9>CDrive</span><span class=cF0> *drive;
<a name="l219"></a>
<a name="l220"></a> </span><span class=cF1>if</span><span class=cF0> (drive = </span><span class=cF5>Letter2Drive</span><span class=cF7>(</span><span class=cF0>drv_let, except</span><span class=cF7>)</span><span class=cF0>)
<a name="l221"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF5>BlkDevCheck</span><span class=cF0>(drive-&gt;bd, except);
<a name="l222"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l223"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l224"></a>}
</span></pre></body>
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