[libvirt] [PATCH v1 06/19] conf: Parse vhost-scsi XML tag

[Eric Farman]

Add code that will permit a hostdev tag to specify a vhost protocol,
and parse the associated XML within it.  But don't do anything with
that information just yet.

Signed-off-by: Eric Farman <farman at linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk at linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
---
 src/conf/domain_conf.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 9681d6c..d6b9c42 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2225,6 +2225,14 @@ virDomainHostdevSubsysSCSIiSCSIClear(virDomainHostdevSubsysSCSIiSCSIPtr iscsisrc
     iscsisrc->auth = NULL;
 }
 
+static void
+virDomainHostdevSubsysSCSIVhostClear(virDomainHostdevSubsysSCSIVhostPtr vhostsrc)
+{
+    if (!vhostsrc)
+        return;
+    VIR_FREE(vhostsrc->wwpn);
+}
+
 void virDomainHostdevDefClear(virDomainHostdevDefPtr def)
 {
     if (!def)
@@ -2261,6 +2269,9 @@ void virDomainHostdevDefClear(virDomainHostdevDefPtr def)
             if (scsisrc->protocol ==
                 VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI) {
                 virDomainHostdevSubsysSCSIiSCSIClear(&scsisrc->u.iscsi);
+            } else if (scsisrc->protocol ==
+                       VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_VHOST) {
+                virDomainHostdevSubsysSCSIVhostClear(&scsisrc->u.vhost);
             } else {
                 VIR_FREE(scsisrc->u.host.adapter);
             }
@@ -5943,6 +5954,31 @@ virDomainHostdevSubsysSCSIiSCSIDefParseXML(xmlNodePtr sourcenode,
 }
 
 static int
+virDomainHostdevSubsysSCSIVhostDefParseXML(xmlNodePtr sourcenode,
+                                           virDomainHostdevSubsysSCSIPtr def)
+{
+    virDomainHostdevSubsysSCSIVhostPtr vhostsrc = &def->u.vhost;
+
+    if (!(vhostsrc->wwpn = virXMLPropString(sourcenode, "wwpn"))) {
+        virReportError(VIR_ERR_XML_ERROR, "%s",
+                       _("missing vhost-scsi hostdev source path name"));
+        goto cleanup;
+    }
+
+    if (!STRPREFIX(vhostsrc->wwpn, "naa.") ||
+        strlen(vhostsrc->wwpn) != strlen("naa.") + 16) {
+        virReportError(VIR_ERR_XML_ERROR, "%s", _("malformed 'wwpn' value"));
+        goto cleanup;
+    }
+
+    return 0;
+
+ cleanup:
+    VIR_FREE(vhostsrc->wwpn);
+    return -1;
+}
+
+static int
 virDomainHostdevSubsysSCSIDefParseXML(xmlNodePtr sourcenode,
                                       virDomainHostdevSubsysSCSIPtr scsisrc)
 {
@@ -5962,6 +5998,8 @@ virDomainHostdevSubsysSCSIDefParseXML(xmlNodePtr sourcenode,
 
     if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI)
         ret = virDomainHostdevSubsysSCSIiSCSIDefParseXML(sourcenode, scsisrc);
+    else if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_VHOST)
+        ret = virDomainHostdevSubsysSCSIVhostDefParseXML(sourcenode, scsisrc);
     else
         ret = virDomainHostdevSubsysSCSIHostDefParseXML(sourcenode, scsisrc);
 
-- 
1.9.1