--- /dev/null
+<?xml version="1.0"?>
+<facility name="fs_data">
+ <description>The fs_data facility contains events related to file system data input/output</description>
+
+ <event name="read">
+ <description>Reading from a file descriptor</description>
+ <field name="fd"> <description>File descriptor</description> <uint size="4"/> </field>
+ <field name="count"> <description>Number of bytes to read</description> <size_t/> </field>
+ <field name="data"> <description>data read</description>
+ <sequence write="custom">
+ <uint/>
+ <uchar/>
+ </sequence>
+ </field>
+ </event>
+
+ <event name="write">
+ <description>Write to a file descriptor</description>
+ <field name="fd"> <description>File descriptor</description> <uint size="4"/> </field>
+ <field name="count"> <description>Number of bytes to write</description> <size_t/> </field>
+ <field name="data"> <description>data written</description>
+ <sequence write="custom">
+ <uint/>
+ <uchar/>
+ </sequence>
+ </field>
+ </event>
+
+</facility>