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QCOW2 images now support 'extended_l2' which splits the default clusters into 32 subcluster allocation units. This allows the allocation units to be smaller without increasing the size of L2 table too much and thus also the cache requirements for holding the full L2 table in memory. Unfortunately it's incompatible with qemu versions older than 5.2 thus can't be used as default. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
260 lines
6.1 KiB
XML
260 lines
6.1 KiB
XML
<?xml version="1.0"?>
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<!-- A Relax NG schema for common libvirt XML storage elements -->
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<grammar xmlns="http://relaxng.org/ns/structure/1.0"
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datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
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<!-- This schema is not designed for standalone use; another file
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must include both this file and basictypes.rng -->
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<define name="encryption">
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<element name="encryption">
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<attribute name="format">
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<choice>
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<value>default</value>
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<value>qcow</value>
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<value>luks</value>
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<value>luks2</value>
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</choice>
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</attribute>
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<optional>
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<attribute name="engine">
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<choice>
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<value>qemu</value>
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<value>librbd</value>
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</choice>
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</attribute>
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</optional>
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<interleave>
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<ref name="secret"/>
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<optional>
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<element name="cipher">
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<ref name="keycipher"/>
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</element>
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<element name="ivgen">
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<ref name="keyivgen"/>
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</element>
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</optional>
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</interleave>
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</element>
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</define>
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<define name="initiatorinfo">
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<element name="initiator">
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<element name="iqn">
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<attribute name="name">
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<text/>
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</attribute>
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<empty/>
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</element>
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</element>
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</define>
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<define name="reconnect">
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<element name="reconnect">
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<attribute name="enabled">
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<ref name="virYesNo"/>
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</attribute>
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<optional>
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<attribute name="timeout">
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<ref name="unsignedInt"/>
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</attribute>
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</optional>
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</element>
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</define>
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<define name="unixSocketSource">
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<element name="source">
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<attribute name="type">
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<value>unix</value>
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</attribute>
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<attribute name="path">
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<ref name="absFilePath"/>
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</attribute>
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<attribute name="mode">
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<choice>
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<value>server</value>
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<value>client</value>
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</choice>
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</attribute>
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<optional>
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<ref name="reconnect"/>
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</optional>
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<empty/>
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</element>
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</define>
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<define name="reservations">
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<element name="reservations">
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<optional>
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<attribute name="managed">
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<ref name="virYesNo"/>
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</attribute>
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</optional>
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<optional>
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<ref name="unixSocketSource"/>
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</optional>
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</element>
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</define>
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<define name="secret">
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<element name="secret">
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<attribute name="type">
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<value>passphrase</value>
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</attribute>
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<choice>
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<attribute name="uuid">
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<ref name="UUID"/>
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</attribute>
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<attribute name="usage">
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<text/>
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</attribute>
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</choice>
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</element>
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</define>
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<define name="compat">
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<element name="compat">
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<data type="string">
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<param name="pattern">[0-9]+\.[0-9]+</param>
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</data>
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</element>
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</define>
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<define name="clusterSize">
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<element name="clusterSize">
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<ref name="scaledInteger"/>
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</element>
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</define>
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<define name="fileFormatFeatures">
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<element name="features">
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<interleave>
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<optional>
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<element name="lazy_refcounts">
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<empty/>
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</element>
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</optional>
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<optional>
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<element name="extended_l2">
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<empty/>
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</element>
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</optional>
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</interleave>
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</element>
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</define>
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<!-- split the list of known storage formats into two, those where
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we know how to follow backing chains, and all others -->
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<define name="storageFormatBacking">
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<choice>
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<value>cow</value>
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<value>qcow</value>
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<value>qcow2</value>
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<value>qed</value>
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<value>vmdk</value>
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</choice>
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</define>
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<define name="storageFormat">
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<choice>
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<value>raw</value>
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<value>dir</value>
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<value>bochs</value>
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<value>cloop</value>
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<value>dmg</value>
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<value>iso</value>
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<value>vpc</value>
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<value>vdi</value>
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<value>fat</value>
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<value>vhd</value>
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<value>ploop</value>
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<value>luks</value>
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<ref name="storageFormatBacking"/>
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</choice>
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</define>
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<define name="storageStartupPolicy">
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<!-- Use a combine="choice" override in client files that want to
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add additional attributes to a <source> sub-element
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associated with a storage source -->
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<notAllowed/>
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</define>
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<define name="storageSourceExtra">
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<!-- Use a combine="choice" override in client files that want to
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add additional elements as siblings of a <source> sub-element
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associated with a storage source -->
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<notAllowed/>
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</define>
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<define name="permissions">
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<optional>
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<element name="permissions">
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<interleave>
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<optional>
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<element name="mode">
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<ref name="octalMode"/>
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</element>
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</optional>
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<optional>
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<element name="owner">
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<choice>
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<ref name="unsignedInt"/>
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<value>-1</value>
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</choice>
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</element>
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</optional>
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<optional>
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<element name="group">
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<choice>
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<ref name="unsignedInt"/>
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<value>-1</value>
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</choice>
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</element>
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</optional>
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<optional>
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<element name="label">
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<text/>
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</element>
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</optional>
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</interleave>
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</element>
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</optional>
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</define>
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<define name="keycipher">
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<attribute name="name">
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<text/>
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</attribute>
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<attribute name="size">
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<ref name="unsignedInt"/>
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</attribute>
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<optional>
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<attribute name="mode">
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<text/>
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</attribute>
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<attribute name="hash">
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<text/>
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</attribute>
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</optional>
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</define>
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<define name="keyivgen">
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<attribute name="name">
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<text/>
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</attribute>
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<optional>
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<attribute name="hash">
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<text/>
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</attribute>
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</optional>
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</define>
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<define name="refreshVolumeAllocation">
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<choice>
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<value>default</value>
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<value>capacity</value>
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</choice>
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</define>
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</grammar>
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