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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- http://linux-ntfs.sourceforge.net/ntfs/files/quota.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>$Quota (Any) - File - 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>File - $Quota (Any)</h1> <a class="prevnext" accesskey="," href="objid.html">Previous</a> <a class="prevnext" accesskey="." href="reparse.html">Next</a> <h2>Overview</h2> <p> This file first appeared in Window NT, but wan't used. In Windows 2000, and later, it keeps track of file quotas. Quotas are kept per person and per volume. </p> <h2><a class="heading" href="../attributes/index.html">Attributes</a></h2> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Type</th> <th>Description</th> <th>Name</th> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/standard_information.html">0x10</a></td> <td><a href="../attributes/standard_information.html">$STANDARD_INFORMATION</a></td> <td> </td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/file_name.html">0x30</a></td> <td><a href="../attributes/file_name.html">$FILE_NAME</a></td> <td>$Quota</td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/index_root.html">0x90</a></td> <td><a href="../attributes/index_root.html">$INDEX_ROOT</a></td> <td>$O</td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/index_root.html">0x90</a></td> <td><a href="../attributes/index_root.html">$INDEX_ROOT</a></td> <td>$Q</td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/index_allocation.html">0xA0</a></td> <td><a href="../attributes/index_allocation.html">$INDEX_ALLOCATION</a></td> <td>$O</td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/index_allocation.html">0xA0</a></td> <td><a href="../attributes/index_allocation.html">$INDEX_ALLOCATION</a></td> <td>$Q</td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/bitmap.html">0xB0</a></td> <td><a href="../attributes/bitmap.html">$BITMAP</a></td> <td>$O</td> </tr> <tr> <td class="numeric"><a class="numeric" href="../attributes/bitmap.html">0xB0</a></td> <td><a href="../attributes/bitmap.html">$BITMAP</a></td> <td>$Q</td> </tr> </table> <h2>Layout of the File</h2> <h3>$O Index</h3> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Offset</th> <th class="numeric">Size</th> <th class="numeric">Value</th> <th colspan="2">Description</th> </tr> <tr> <td class="numeric">~</td> <td class="numeric">~</td> <td class="numeric">~</td> <td colspan="2"><a href="../concepts/index_header.html">Standard Index Header</a></td> </tr> <tr> <td class="numeric">0x00</td> <td class="numeric">2</td> <td class="numeric">0x1C</td> <td colspan="2">Offset to data</td> </tr> <tr> <td class="numeric">0x02</td> <td class="numeric">2</td> <td class="numeric">0x04</td> <td colspan="2">Size of data</td> </tr> <tr> <td class="numeric">0x04</td> <td class="numeric">4</td> <td class="numeric">0x00</td> <td colspan="2">Padding</td> </tr> <tr> <td class="numeric">0x08</td> <td class="numeric">2</td> <td class="numeric">0x20</td> <td colspan="2">Size of Index Entry</td> </tr> <tr> <td class="numeric">0x0A</td> <td class="numeric">2</td> <td class="numeric">0x0C</td> <td colspan="2">Size of Index Key (K)</td> </tr> <tr> <td class="numeric">0x0C</td> <td class="numeric">2</td> <td class="numeric"> </td> <td colspan="2">Flags</td> </tr> <tr> <td class="numeric">0x0E</td> <td class="numeric">2</td> <td class="numeric">0x00</td> <td colspan="2">Padding</td> </tr> <tr> <td class="numeric">0x10</td> <td class="numeric">K</td> <td class="numeric"> </td> <td>Key</td> <td>SID</td> </tr> <tr> <td class="numeric">K+0x10</td> <td class="numeric">4</td> <td class="numeric"> </td> <td>Data</td> <td>Owner Id</td> </tr> <tr> <td class="numeric">K+0x14</td> <td class="numeric">P</td> <td class="numeric"> </td> <td>Data</td> <td>Padding8</td> </tr> </table> <pre>Flags?</pre> <h3>$Q Index</h3> <pre>header & repeating group</pre> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Offset</th> <th class="numeric">Size</th> <th class="numeric">Value</th> <th colspan="2">Description</th> </tr> <tr> <td class="numeric">~</td> <td class="numeric">~</td> <td class="numeric">~</td> <td colspan="2"><a href="../concepts/index_header.html">Standard Index Header</a></td> </tr> <tr> <td class="numeric">0x00</td> <td class="numeric">2</td> <td class="numeric">0x14</td> <td colspan="2">Offset to data</td> </tr> <tr> <td class="numeric">0x02</td> <td class="numeric">2</td> <td class="numeric"> </td> <td colspan="2">Size of data</td> </tr> <tr> <td class="numeric">0x04</td> <td class="numeric">4</td> <td class="numeric">0x00</td> <td colspan="2">Padding</td> </tr> <tr> <td class="numeric">0x08</td> <td class="numeric">2</td> <td class="numeric"> </td> <td colspan="2">Size of Index Entry</td> </tr> <tr> <td class="numeric">0x0A</td> <td class="numeric">2</td> <td class="numeric">0x04</td> <td colspan="2">Size of Index Key</td> </tr> <tr> <td class="numeric">0x0C</td> <td class="numeric">4</td> <td class="numeric">0x00</td> <td colspan="2">Padding</td> </tr> <tr> <td class="numeric">0x10</td> <td class="numeric">4</td> <td class="numeric"> </td> <td>Key</td> <td>Owner Id</td> </tr> <tr> <td class="numeric">0x14</td> <td class="numeric">4</td> <td class="numeric">0x02</td> <td>Data</td> <td>Version</td> </tr> <tr> <td class="numeric">0x18</td> <td class="numeric">4</td> <td class="numeric"> </td> <td>Data</td> <td>Flags</td> </tr> <tr> <td class="numeric">0x1C</td> <td class="numeric">8</td> <td class="numeric"> </td> <td>Data</td> <td>Bytes Used</td> </tr> <tr> <td class="numeric">0x24</td> <td class="numeric">8</td> <td class="numeric"> </td> <td>Data</td> <td>Change Time</td> </tr> <tr> <td class="numeric">0x2C</td> <td class="numeric">8</td> <td class="numeric"> </td> <td>Data</td> <td>Warning Limit</td> </tr> <tr> <td class="numeric">0x34</td> <td class="numeric">8</td> <td class="numeric"> </td> <td>Data</td> <td>Hard Limit</td> </tr> <tr> <td class="numeric">0x3C</td> <td class="numeric">8</td> <td class="numeric"> </td> <td>Data</td> <td>Exceeded Time</td> </tr> <tr> <td class="numeric">0x44</td> <td class="numeric">V</td> <td class="numeric"> </td> <td>Data</td> <td>SID</td> </tr> <tr> <td class="numeric">V+0x44</td> <td class="numeric">P</td> <td class="numeric">0x00</td> <td>Data</td> <td>Padding8</td> </tr> </table> <pre> sid may be missing (quota flags = default limit => no SID, just padding) padding may not be necessary index key - xref to which index? change time - date/time exceeded time - 10/4/01 (not +5 days) in the last (null) entry, the padding at 0x0C = 0x02 </pre> <h3>Flags</h3> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Flag</th> <th>Description</th> </tr> <tr> <td class="numeric">0x0001</td> <td>Default Limits</td> </tr> <tr> <td class="numeric">0x0002</td> <td>Limit Reached</td> </tr> <tr> <td class="numeric">0x0004</td> <td>Id Deleted</td> </tr> <tr> <td class="numeric">0x0010</td> <td>Tracking Enabled</td> </tr> <tr> <td class="numeric">0x0020</td> <td>Enforcement Enabled</td> </tr> <tr> <td class="numeric">0x0040</td> <td>Tracking Requested</td> </tr> <tr> <td class="numeric">0x0080</td> <td>Log Threshold</td> </tr> <tr> <td class="numeric">0x0100</td> <td>Log Limit</td> </tr> <tr> <td class="numeric">0x0200</td> <td>Out Of Date</td> </tr> <tr> <td class="numeric">0x0400</td> <td>Corrupt</td> </tr> <tr> <td class="numeric">0x0800</td> <td>Pending Deletes</td> </tr> </table> <h2>Notes</h2> <h3>Other Information</h3> <p> The index is called <q>$O</q>. This is an index of Owner Ids. It should not be confused with the index of the same name, used by the Metadata File <a href="objid.html">$ObjId</a>. </p> <p> A file's Owner Id is stored in the <a href="../attributes/standard_information.html">$STANDARD_INFORMATION Attribute</a>. The Owner Id can be looked up in $O, to give a Security Id (SID) or looked up in $Q to provide quota information. </p> <pre> The $Q index contains one entry for each existing user_id on the volume. The index key is the user_id of the user/group owning this quota control entry, i.e. the key is the owner_id. The user_id of the owner of a file, i.e. the owner_id, is found in the standard information attribute. The collation rule for $Q is COLLATION_NTOFS_ULONG. The $O index contains one entry for each user/group who has been assigned a quota on that volume. The index key holds the SID of the user_id the entry belongs to, i.e. the owner_id. The collation rule for $O is COLLATION_NTOFS_SID. The $O index entry data is the user_id of the user corresponding to the SID. This user_id is used as an index into $Q to find the quota control entry associated with the SID. </pre> <br> <a class="contact" href="http://linux-ntfs.sourceforge.net/ntfs/files/quota.html">Online</a> <!-- The two validators will only work if this page is visible on the web --> <a class="contact" href="http://validator.w3.org/check/referer">Validate HTML</a> <a class="contact" href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a> <a class="contact" href="mailto:webmaster@flatcap.org">$Id: quota.html,v 1.12 2001/07/11 11:04:05 flatcap Exp $</a> </body></html>⌨️ 快捷键说明
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