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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- http://linux-ntfs.sourceforge.net/ntfs/attributes/reparse_point.html --><html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <meta name="description" content="NTFS Documentation"> <link rel="stylesheet" type="text/css" href="../style/ntfsdoc.css"> <link rel="start" type="text/html" href="../index.html" title="NTFS Documentation"> <title>$REPARSE_POINT (0xC0) - Attribute - NTFS Documentation</title> </head> <body> <table border="0" class="toolbar" summary="" cellspacing="0"> <tr> <td class="toolbar"><a accesskey="1" class="toolbar" href="../index.html">Home</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="2" class="toolbar" href="../files/index.html">Files</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="3" class="toolbar" href="../attributes/index.html">Attributes</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="4" class="toolbar" href="../concepts/index.html">Concepts</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="5" class="toolbar" href="../help/glossary.html">Glossary</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="6" class="toolbar" href="../help/index.html">Help</a></td> </tr> </table> <h1>Attribute - $REPARSE_POINT (0xC0)</h1> <a class="prevnext" accesskey="," href="bitmap.html">Previous</a> <a class="prevnext" accesskey="." href="ea_information.html">Next</a> <h2>Overview</h2> <p> As defined in <a href="../files/attrdef.html">$AttrDef</a>, this attribute has a no minimum size but a maximum of 16384 bytes. </p> <h2>Layout of the Attribute</h2> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Offset</th> <th class="numeric">Size</th> <th>Description</th> </tr> <tr> <td class="numeric">~</td> <td class="numeric">~</td> <td><a href="../concepts/attribute_header.html">Standard Attribute Header</a></td> </tr> <tr> <td class="numeric">0x00</td> <td class="numeric">4</td> <td>Reparse Type (and Flags)</td> </tr> <tr> <td class="numeric">0x04</td> <td class="numeric">2</td> <td>Reparse Data Length</td> </tr> <tr> <td class="numeric">0x06</td> <td class="numeric">2</td> <td>Padding (align to 8 bytes)</td> </tr> <tr> <td class="numeric">0x08</td> <td class="numeric">V</td> <td>Reparse Data</td> </tr> </table> <pre>The structure of the Reparse Data depends on the Reparse Type</pre> <h3>Reparse Tag Flags</h3> <pre>These are just the predefined reparse flags</pre> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Flag</th> <th>Description</th> </tr> <tr> <td class="numeric">0x20000000</td> <td>Is alias</td> </tr> <tr> <td class="numeric">0x40000000</td> <td>Is high latency</td> </tr> <tr> <td class="numeric">0x80000000</td> <td>Is Microsoft</td> </tr> <tr> <td class="numeric">0x68000005</td> <td>NSS</td> </tr> <tr> <td class="numeric">0x68000006</td> <td>NSS recover</td> </tr> <tr> <td class="numeric">0x68000007</td> <td>SIS</td> </tr> <tr> <td class="numeric">0x68000008</td> <td>DFS</td> </tr> <tr> <td class="numeric">0x88000003</td> <td>Mount point</td> </tr> <tr> <td class="numeric">0xA8000004</td> <td>HSM</td> </tr> <tr> <td class="numeric">0xE8000000</td> <td>Symbolic link</td> </tr> </table> <h2>Notes</h2> <h3>Other Information</h3> <pre> The reparse point tag defines the type of the reparse point. It also includes several flags, which further describe the reparse point. The reparse point tag is an unsigned 32-bit value divided in three parts: 1. The least significant 16 bits (i.e. bits 0 to 15) specifiy the type of the reparse point. 2. The 13 bits after this (i.e. bits 16 to 28) are reserved for future use. 3. The most significant three bits are flags describing the reparse point. They are defined as follows: bit 29: Name surrogate bit. If set, the filename is an alias for another object in the system. bit 30: High-latecny bit. If set, accessing the first byte of data will be slow. (E.g. the data is stored on a tape drive.) bit 31: Microsoft bit. If set, the tag is owned by Microsoft. User defined tags have to use zero here. The system file FILE_$Extend/$Reparse contains an index named $R listing all reparse points on the volume. The index entry keys are as defined below. Note, that there is no index data associated with the index entries. The index entries are sorted by the index key file_id. The collation rule is COLLATION_NTOFS_ULONGS. FIXME: Verify whether the reparse_tag is not the primary key / is not a key at all. (AIA) </pre> <br> <a class="contact" href="http://linux-ntfs.sourceforge.net/ntfs/attributes/reparse_point.html">Online</a> <!-- The two validators will only work if this page is visible on the web --> <a class="contact" href="http://validator.w3.org/check/referer">Validate HTML</a> <a class="contact" href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a> <a class="contact" href="mailto:webmaster@flatcap.org">$Id: reparse_point.html,v 1.11 2001/07/11 16:31:44 flatcap Exp $</a> </body></html>⌨️ 快捷键说明
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