Re: [libvirt] [PATCH v3 RESEND] vhost-user: add support reconnect for vhost-user ports

For vhost-user ports, Open vSwitch acts as the server and QEMU the client. When OVS crashes or restarts, the QEMU process should be reconnected to OVS. Signed-off-by: ZhiPeng Lu <lu.zhipeng(a)zte.com.cn&gt; --- docs/schemas/domaincommon.rng | 26 ++++++++------ src/conf/domain_conf.c | 40 ++++++++++++++++++---- src/conf/domain_conf.h | 10 +++--- src/qemu/qemu_command.c | 2 +- src/qemu/qemu_domain.c | 2 +- src/qemu/qemu_monitor_json.c | 2 +- .../qemuxml2argv-net-vhostuser-multiq.args | 4 +-- .../qemuxml2argv-net-vhostuser-multiq.xml | 8 +++-- 8 files changed, 65 insertions(+), 29 deletions(-) diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng index 76852ab..3f4ed82 100644 --- a/docs/schemas/domaincommon.rng +++ b/docs/schemas/domaincommon.rng @@ -2327,6 +2327,18 @@ </attribute> </optional> </define> + <define name="reconnect"> + <element name="reconnect"> + <attribute name="enabled"> + <ref name="virYesNo"/> + </attribute> + <optional> + <attribute name="timeout"> + <ref name="unsignedInt"/> + </attribute> + </optional> + </element> + </define> <!-- An interface description can either be of type bridge in which case @@ -2388,6 +2400,9 @@ <value>client</value> </choice> </attribute> + <optional> + <ref name="reconnect"/> + </optional>

<empty/> </element> <ref name="interface-options"/> @@ -3636,16 +3651,7 @@ </attribute> </optional> <optional> - <element name="reconnect"> - <attribute name="enabled"> - <ref name="virYesNo"/> - </attribute> - <optional> - <attribute name="timeout"> - <ref name="unsignedInt"/> - </attribute> - </optional> - </element> + <ref name="reconnect"/> </optional> <zeroOrMore> <ref name='devSeclabel'/> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index cc5e79b..b7fc3a5 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -83,6 +83,13 @@ struct _virDomainXMLOption { /* Private data for save image stored in snapshot XML */ virSaveCookieCallbacks saveCookie; }; +static int +virDomainDeviceSourceReconnectDefParseXML(virDomainDeviceSourceReconnectDefPtr def, + xmlNodePtr node, + xmlXPathContextPtr ctxt); +static void +virDomainDeviceSourceReconnectDefFormat(virBufferPtr buf, + virDomainDeviceSourceReconnectDefPtr def);

#define VIR_DOMAIN_DEF_FORMAT_COMMON_FLAGS \ (VIR_DOMAIN_DEF_FORMAT_SECURE | \ @@ -10245,6 +10252,7 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, virNWFilterHashTablePtr filterparams = NULL; virDomainActualNetDefPtr actual = NULL; xmlNodePtr oldnode = ctxt->node; + virDomainDeviceSourceReconnectDef reconnect = {0}; int rv, val; if (VIR_ALLOC(def) < 0) @@ -10331,6 +10339,8 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, vhostuser_type = virXMLPropString(cur, "type"); vhostuser_path = virXMLPropString(cur, "path"); vhostuser_mode = virXMLPropString(cur, "mode"); + if (virDomainDeviceSourceReconnectDefParseXML(&reconnect, cur, ctxt) < 0) + goto error; } else if (!def->virtPortProfile && virXMLNodeNameEqual(cur, "virtualport")) { if (def->type == VIR_DOMAIN_NET_TYPE_NETWORK) { @@ -10552,8 +10562,17 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt, if (STREQ(vhostuser_mode, "server")) { def->data.vhostuser->data.nix.listen = true; + if (reconnect.enabled != VIR_TRISTATE_BOOL_ABSENT) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("'reconnect' attribute unsupported " + "'server' mode for <interface type='vhostuser'>")); + goto error; + } } else if (STREQ(vhostuser_mode, "client")) { def->data.vhostuser->data.nix.listen = false; + def->data.vhostuser->data.nix.reconnect.enabled = reconnect.enabled; + def->data.vhostuser->data.nix.reconnect.timeout = reconnect.timeout; + reconnect.enabled = VIR_TRISTATE_BOOL_ABSENT;

} else { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Wrong <source> 'mode' attribute " @@ -11216,7 +11235,7 @@ virDomainChrDefParseTargetXML(virDomainChrDefPtr def, } static int -virDomainChrSourceReconnectDefParseXML(virDomainChrSourceReconnectDefPtr def, +virDomainDeviceSourceReconnectDefParseXML(virDomainDeviceSourceReconnectDefPtr def, xmlNodePtr node, xmlXPathContextPtr ctxt)