[libvirt] [libvirt-glib] API to get/set custom metadata from/to domain config

From: "Zeeshan Ali (Khattak)" <zeeshanak(a)gnome.org&gt; --- libvirt-gconfig/libvirt-gconfig-domain.c | 115 +++++++++++++++++++++++++++++ libvirt-gconfig/libvirt-gconfig-domain.h | 8 ++ libvirt-gconfig/libvirt-gconfig-helpers.c | 4 +- libvirt-gconfig/libvirt-gconfig.sym | 2 + 4 files changed, 128 insertions(+), 1 deletions(-) diff --git a/libvirt-gconfig/libvirt-gconfig-domain.c b/libvirt-gconfig/libvirt-gconfig-domain.c index 61af625..d1faabd 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain.c +++ b/libvirt-gconfig/libvirt-gconfig-domain.c @@ -449,3 +449,118 @@ GList *gvir_config_domain_get_devices(GVirConfigDomain *domain) return data.devices; } + +static void set_namespace_on_tree(xmlNodePtr node, xmlNsPtr namespace) +{ + xmlNodePtr child; + + xmlSetNs(node, namespace); + + for (child = node->children; child != NULL; child = child->next) + set_namespace_on_tree(child, namespace); +} + +static xmlNodePtr gvir_config_domain_get_metadata_node + (GVirConfigDomain *domain, gboolean create) +{ + xmlNodePtr domain_node, metadata_node; + + domain_node = gvir_config_object_get_xml_node(GVIR_CONFIG_OBJECT(domain)); + metadata_node = gvir_config_xml_get_element(domain_node, "metadata", NULL); + if (metadata_node == NULL && create) + metadata_node = xmlNewChild(domain_node, NULL, (xmlChar *)"metadata", NULL); + + return metadata_node; +} + +static xmlNodePtr gvir_config_domain_get_custom_xml_node + (GVirConfigDomain *domain, const gchar *ns_uri) +{ + xmlNodePtr metadata_node, node; + + g_return_val_if_fail(GVIR_CONFIG_IS_DOMAIN(domain), NULL); + + metadata_node = gvir_config_domain_get_metadata_node(domain, FALSE); + if (metadata_node == NULL) + return NULL; + + for (node = metadata_node->children; node != NULL; node = node->next) { + if (node->ns != NULL && + (g_strcmp0 ((gchar *)node->ns->href, ns_uri) == 0)) + break; + } + + return node; +} + +gboolean gvir_config_domain_set_custom_xml(GVirConfigDomain *domain, + const gchar *xml, + const gchar *ns, + const gchar *ns_uri, + GError **error) +{ + xmlNodePtr metadata_node, node, old_node; + xmlDocPtr doc; + xmlNsPtr namespace; + + g_return_val_if_fail(GVIR_CONFIG_IS_DOMAIN(domain), FALSE); + g_return_val_if_fail(xml != NULL, FALSE); + g_return_val_if_fail(ns != NULL, FALSE); + g_return_val_if_fail(ns_uri != NULL, FALSE); + g_return_val_if_fail(error == NULL || *error == NULL, FALSE); + + metadata_node = gvir_config_domain_get_metadata_node(domain, TRUE); + + node = gvir_config_xml_parse(xml, NULL, error); + if (error != NULL && *error != NULL) + return FALSE; + + namespace = xmlNewNs(node, (xmlChar *)ns_uri, (xmlChar *)ns); + set_namespace_on_tree(node, namespace); + doc = node->doc; + + old_node = gvir_config_domain_get_custom_xml_node(domain, ns_uri); + if (old_node != NULL) + xmlReplaceNode(old_node, node); + else { + xmlUnlinkNode(node); + xmlAddChild(metadata_node, node); + } + + xmlFreeDoc(doc); + + return TRUE; +} + +gchar *gvir_config_domain_get_custom_xml(GVirConfigDomain *domain, + const gchar *ns_uri, + GError **error) +{ + xmlNodePtr metadata_node, node; + xmlBufferPtr xmlbuf; + gchar *xml = NULL; + + g_return_val_if_fail(GVIR_CONFIG_IS_DOMAIN(domain), NULL); + + metadata_node = gvir_config_domain_get_metadata_node(domain, FALSE); + if (metadata_node == NULL) + return NULL; + + node = gvir_config_domain_get_custom_xml_node(domain, ns_uri); + if (node == NULL) + return NULL; + + xmlbuf = xmlBufferCreate(); + if (xmlNodeDump(xmlbuf, metadata_node->doc, metadata_node, 0, 0) < 0) + gvir_config_set_error (error, + GVIR_CONFIG_OBJECT_ERROR, + 0, + "Failed to convert custom node '%s' to string", + node->name); + else + xml = g_strndup((gchar *)xmlBufferContent(xmlbuf), xmlBufferLength(xmlbuf)); + + xmlBufferFree(xmlbuf); + + return xml; +} diff --git a/libvirt-gconfig/libvirt-gconfig-domain.h b/libvirt-gconfig/libvirt-gconfig-domain.h index 6cdaec9..96ded07 100644 --- a/libvirt-gconfig/libvirt-gconfig-domain.h +++ b/libvirt-gconfig/libvirt-gconfig-domain.h @@ -126,6 +126,14 @@ GList *gvir_config_domain_get_devices(GVirConfigDomain *domain); void gvir_config_domain_set_lifecycle(GVirConfigDomain *domain, GVirConfigDomainLifecycleEvent event, GVirConfigDomainLifecycleAction action); +gboolean gvir_config_domain_set_custom_xml(GVirConfigDomain *domain, + const gchar *xml, + const gchar *ns, + const gchar *ns_uri, + GError **error); +gchar *gvir_config_domain_get_custom_xml(GVirConfigDomain *domain, + const gchar *ns_uri, + GError **error); G_END_DECLS diff --git a/libvirt-gconfig/libvirt-gconfig-helpers.c b/libvirt-gconfig/libvirt-gconfig-helpers.c index c406a49..140a4a0 100644 --- a/libvirt-gconfig/libvirt-gconfig-helpers.c +++ b/libvirt-gconfig/libvirt-gconfig-helpers.c @@ -148,7 +148,9 @@ gvir_config_xml_parse(const char *xml, const char *root_node, GError **err) "Unable to parse configuration"); return NULL; } - if ((!doc->children) || (strcmp((char *)doc->children->name, root_node) != 0)) { + if ((!doc->children) || + (root_node != NULL && + (strcmp((char *)doc->children->name, root_node) != 0))) { g_set_error(err, GVIR_CONFIG_OBJECT_ERROR, 0, diff --git a/libvirt-gconfig/libvirt-gconfig.sym b/libvirt-gconfig/libvirt-gconfig.sym index 88aef57..ab2c7bf 100644 --- a/libvirt-gconfig/libvirt-gconfig.sym +++ b/libvirt-gconfig/libvirt-gconfig.sym @@ -14,6 +14,8 @@ LIBVIRT_GCONFIG_0.0.4 { gvir_config_domain_new; gvir_config_domain_new_from_xml; gvir_config_domain_set_clock; + gvir_config_domain_set_custom_xml; + gvir_config_domain_get_custom_xml; gvir_config_domain_get_description; gvir_config_domain_set_description; gvir_config_domain_get_devices; -- 1.7.7.5