[libvirt] [PATCH 3/6] docs: Add docs and rng schema for new XML tag sgio

This introduces new XML tag "sgio" for disk, its valid values are "filtered" and "unfiltered", setting it as "filtered" will set the disk's unpriv_sgio to 0, and "unfiltered" to set it as 1, which allows the unprivileged SG_IO commands. --- docs/formatdomain.html.in | 14 ++++++++++- docs/schemas/domaincommon.rng | 54 +++++++++++++++++++++++++++------------- 2 files changed, 49 insertions(+), 19 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 94df6f8..5e37b92 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -1395,7 +1395,19 @@ rawio='yes', rawio capability will be enabled for all disks in the domain (because, in the case of QEMU, this capability can only be set on a per-process basis). This attribute is only - valid when device is "lun". + valid when device is "lun". NB, <code>rawio</code> intends to + confine the capability per-device, however, current QEMU + implementation gives the domain process broader capability + than that (per-process basis, affects all the domain disks). + To confine the capability as much as possible for QEMU driver + as this stage, <code>sgio</code> is recommended, it's more + secure than <code>rawio</code>. + The optional <code>sgio</code> attribute indicates whether the + kernel will filter unprivileged SG_IO commands for the disk, + valid settings are "filtered" or "unfiltered". Defaults to + "filtered". Same with <code>rawio</code>, <code>sgio</code> + is only valid for device 'lun'. + <span class="since">since 1.0.2</span> The optional <code>snapshot</code> attribute indicates the default behavior of the disk during disk snapshots: "internal" requires a file format such as qcow2 that can store both the diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 0529d62..7a97781 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -971,24 +971,42 @@ --> <define name="disk"> <element name="disk"> - <optional> - <attribute name="device"> - <choice> - <value>floppy</value> - <value>disk</value> - <value>cdrom</value> - <value>lun</value> - </choice> - </attribute> - </optional> - <optional> - <attribute name="rawio"> - <choice> - <value>yes</value> - <value>no</value> - </choice> - </attribute> - </optional> + <choice> + <group> + <optional> + <attribute name="device"> + <choice> + <value>floppy</value> + <value>disk</value> + <value>cdrom</value> + </choice> + </attribute> + </optional> + </group> + <group> + <attribute name="device"> + <choice> + <value>lun</value> + </choice> + </attribute> + <optional> + <attribute name="rawio"> + <choice> + <value>yes</value> + <value>no</value> + </choice> + </attribute> + </optional> + <optional> + <attribute name="sgio"> + <choice> + <value>filtered</value> + <value>unfiltered</value> + </choice> + </attribute> + </optional> + </group> + </choice> <optional> <ref name="snapshot"/> </optional> -- 1.7.7.6