[libvirt PATCH v2 3/4] Add virNetworkObj Get and Set Methods for Metadata

- Introduces virNetworkObjGetMetadata() and virNetworkObjSetMetadata(). - These functions implement common behaviour that can be reused by network drivers that use the virNetworkObj struct. - Introduces virNetworkObjUpdateModificationImpact() among other helper functions that resolve the live/persistent state of the network before setting metadata. - Replace redundant flag resolving code with the forementioned function in bridge_driver.c and test_driver.c - Eliminates redundant call of virNetworkObjSetDefTransient() in virNetworkConfigChangeSetup(). Signed-off-by: K Shiva Kiran <shiva_kr(a)riseup.net&gt; --- src/conf/virnetworkobj.c | 329 ++++++++++++++++++++++++++++++++++-- src/conf/virnetworkobj.h | 21 +++ src/libvirt_private.syms | 1 + src/network/bridge_driver.c | 14 +- src/test/test_driver.c | 16 +- 5 files changed, 345 insertions(+), 36 deletions(-) diff --git a/src/conf/virnetworkobj.c b/src/conf/virnetworkobj.c index b8b86da06f..20ee8eb58a 100644 --- a/src/conf/virnetworkobj.c +++ b/src/conf/virnetworkobj.c @@ -725,7 +725,6 @@ virNetworkObjReplacePersistentDef(virNetworkObj *obj, */ static int virNetworkObjConfigChangeSetup(virNetworkObj *obj, - virNetworkXMLOption *xmlopt, unsigned int flags) { bool isActive; @@ -738,17 +737,10 @@ virNetworkObjConfigChangeSetup(virNetworkObj *obj, return -1; } - if (flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) { - if (!obj->persistent) { + if ((flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) && + !obj->persistent) { virReportError(VIR_ERR_OPERATION_INVALID, "%s", - _("cannot change persistent config of a " - "transient network")); - return -1; - } - /* this should already have been done by the driver, but do it - * anyway just in case. - */ - if (isActive && (virNetworkObjSetDefTransient(obj, false, xmlopt) < 0)) + _("cannot change persistent config of a transient network")); return -1; } @@ -1187,7 +1179,7 @@ virNetworkObjUpdate(virNetworkObj *obj, g_autoptr(virNetworkDef) configdef = NULL; /* normalize config data, and check for common invalid requests. */ - if (virNetworkObjConfigChangeSetup(obj, xmlopt, flags) < 0) + if (virNetworkObjConfigChangeSetup(obj, flags) < 0) return -1; if (flags & VIR_NETWORK_UPDATE_AFFECT_LIVE) { @@ -1822,3 +1814,316 @@ virNetworkObjLoadAllPorts(virNetworkObj *net, return 0; } + + +/** + * virNetworkObjUpdateModificationImpact: + * + * @obj: network object + * @flags: flags to update the modification impact on + * + * Resolves virNetworkUpdateFlags in @flags so that they correctly + * apply to the actual state of @obj. @flags may be modified after call to this + * function. + * + * Returns 0 on success if @flags point to a valid combination for @obj or -1 on + * error. + */ +int +virNetworkObjUpdateModificationImpact(virNetworkObj *obj, + unsigned int *flags) +{ + bool isActive = virNetworkObjIsActive(obj); + + if ((*flags & (VIR_NETWORK_UPDATE_AFFECT_LIVE | VIR_NETWORK_UPDATE_AFFECT_CONFIG)) == + VIR_NETWORK_UPDATE_AFFECT_CURRENT) { + if (isActive) + *flags |= VIR_NETWORK_UPDATE_AFFECT_LIVE; + else + *flags |= VIR_NETWORK_UPDATE_AFFECT_CONFIG; + } + + if (virNetworkObjConfigChangeSetup(obj, *flags) < 0) + return -1; + + return 0; +} + + +/** + * virNetworkObjGetDefs: + * + * @net: network object + * @flags: for virNetworkUpdateFlags + * @liveDef: Set the pointer to the live definition of @net. + * @persDef: Set the pointer to the config definition of @net. + * + * Helper function to resolve @flags and retrieve correct network pointer + * objects. This function should be used only when the network driver + * creates net->newDef once the network has started. + * + * If @liveDef or @persDef are set it implies that @flags request modification + * thereof. + * + * Returns 0 on success and sets @liveDef and @persDef; -1 if @flags are + * inappropriate. + */ +static int +virNetworkObjGetDefs(virNetworkObj *net, + unsigned int flags, + virNetworkDef **liveDef, + virNetworkDef **persDef) +{ + if (liveDef) + *liveDef = NULL; + + if (persDef) + *persDef = NULL; + + if (virNetworkObjUpdateModificationImpact(net, &flags) < 0) + return -1; + + if (virNetworkObjIsActive(net)) { + if (liveDef && (flags & VIR_NETWORK_UPDATE_AFFECT_LIVE)) + *liveDef = net->def; + + if (persDef && (flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG)) + *persDef = net->newDef; + } else { + if (persDef) + *persDef = net->def; + } + + return 0; +} + + +/** + * virNetworkObjGetOneDefState: + * + * @net: Network object + * @flags: for virNetworkUpdateFlags + * @live: set to true if live config was returned (may be omitted) + * + * Helper function to resolve @flags and return the correct network pointer + * object. This function returns one of @net->def or @net->persistentDef + * according to @flags. @live is set to true if the live net config will be + * returned. This helper should be used only in APIs that guarantee + * that @flags contains exactly one of VIR_NETWORK_UPDATE_AFFECT_LIVE or + * VIR_NETWORK_UPDATE_AFFECT_CONFIG and not both. + * + * Returns the correct definition pointer or NULL on error. + */ +static virNetworkDef * +virNetworkObjGetOneDefState(virNetworkObj *net, + unsigned int flags, + bool *live) +{ + if (flags & VIR_NETWORK_UPDATE_AFFECT_LIVE && + flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) { + virReportInvalidArg(flags, "%s", + _("Flags 'VIR_NETWORK_UPDATE_AFFECT_LIVE' and 'VIR_NETWORK_UPDATE_AFFECT_CONFIG' are mutually exclusive")); + return NULL; + } + + if (virNetworkObjUpdateModificationImpact(net, &flags) < 0) + return NULL; + + if (live) + *live = flags & VIR_NETWORK_UPDATE_AFFECT_LIVE; + + if (virNetworkObjIsActive(net) && flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) + return net->newDef; + + return net->def; +} + + +/** + * virNetworkObjGetOneDef: + * + * @net: Network object + * @flags: for virNetworkUpdateFlags + * + * Helper function to resolve @flags and return the correct network pointer + * object. This function returns one of @net->def or @net->persistentDef + * according to @flags. This helper should be used only in APIs that guarantee + * that @flags contains exactly one of VIR_NETWORK_UPDATE_AFFECT_LIVE or + * VIR_NETWORK_UPDATE_AFFECT_CONFIG and not both. + * + * Returns the correct definition pointer or NULL on error. + */ +static virNetworkDef * +virNetworkObjGetOneDef(virNetworkObj *net, + unsigned int flags) +{ + return virNetworkObjGetOneDefState(net, flags, NULL); +} + + +char * +virNetworkObjGetMetadata(virNetworkObj *net, + int type, + const char *uri, + unsigned int flags) +{ + virNetworkDef *def; + char *ret = NULL; + + virCheckFlags(VIR_NETWORK_UPDATE_AFFECT_LIVE | + VIR_NETWORK_UPDATE_AFFECT_CONFIG, NULL); + + if (type >= VIR_NETWORK_METADATA_LAST) { + virReportError(VIR_ERR_INVALID_ARG, + _("unknown metadata type '%1$d'"), type); + return NULL; + } + + if (!(def = virNetworkObjGetOneDef(net, flags))) + return NULL; + + switch ((virNetworkMetadataType) type) { + case VIR_NETWORK_METADATA_DESCRIPTION: + ret = g_strdup(def->description); + break; + + case VIR_NETWORK_METADATA_TITLE: + ret = g_strdup(def->title); + break; + + case VIR_NETWORK_METADATA_ELEMENT: + if (!def->metadata) + break; + + if (virXMLExtractNamespaceXML(def->metadata, uri, &ret) < 0) + return NULL; + break; + + case VIR_NETWORK_METADATA_LAST: + break; + } + + if (!ret) + virReportError(VIR_ERR_NO_NETWORK_METADATA, "%s", + _("Requested metadata element is not present")); + + return ret; +} + + +static int +virNetworkDefSetMetadata(virNetworkDef *def, + int type, + const char *metadata, + const char *key, + const char *uri) +{ + g_autoptr(xmlDoc) doc = NULL; + xmlNodePtr old; + g_autoptr(xmlNode) new = NULL; + + if (type >= VIR_NETWORK_METADATA_LAST) { + virReportError(VIR_ERR_INVALID_ARG, + _("unknown metadata type '%1$d'"), type); + return -1; + } + + switch ((virNetworkMetadataType) type) { + case VIR_NETWORK_METADATA_DESCRIPTION: + g_clear_pointer(&def->description, g_free); + + if (STRNEQ_NULLABLE(metadata, "")) + def->description = g_strdup(metadata); + break; + + case VIR_NETWORK_METADATA_TITLE: + g_clear_pointer(&def->title, g_free); + + if (STRNEQ_NULLABLE(metadata, "")) + def->title = g_strdup(metadata); + break; + + case VIR_NETWORK_METADATA_ELEMENT: + if (metadata) { + + /* parse and modify the xml from the user */ + if (!(doc = virXMLParseStringCtxt(metadata, _("(metadata_xml)"), NULL))) + return -1; + + if (virXMLInjectNamespace(doc->children, uri, key) < 0) + return -1; + + /* create the root node if needed */ + if (!def->metadata) + def->metadata = virXMLNewNode(NULL, "metadata"); + + if (!(new = xmlCopyNode(doc->children, 1))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Failed to copy XML node")); + return -1; + } + } + + /* remove possible other nodes sharing the namespace */ + while ((old = virXMLFindChildNodeByNs(def->metadata, uri))) { + xmlUnlinkNode(old); + xmlFreeNode(old); + } + + if (new) { + if (!(xmlAddChild(def->metadata, new))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to add metadata to XML document")); + return -1; + } + new = NULL; + } + break; + + case VIR_NETWORK_METADATA_LAST: + break; + } + + return 0; +} + + +int +virNetworkObjSetMetadata(virNetworkObj *net, + int type, + const char *metadata, + const char *key, + const char *uri, + virNetworkXMLOption *xmlopt, + const char *stateDir, + const char *configDir, + unsigned int flags) +{ + virNetworkDef *def; + virNetworkDef *persistentDef; + + virCheckFlags(VIR_NETWORK_UPDATE_AFFECT_LIVE | + VIR_NETWORK_UPDATE_AFFECT_CONFIG, -1); + + if (virNetworkObjGetDefs(net, flags, &def, &persistentDef) < 0) + return -1; + + if (def) { + if (virNetworkDefSetMetadata(def, type, metadata, key, uri) < 0) + return -1; + + if (virNetworkObjSaveStatus(stateDir, net, xmlopt) < 0) + return -1; + } + + if (persistentDef) { + if (virNetworkDefSetMetadata(persistentDef, type, metadata, key, + uri) < 0) + return -1; + + if (virNetworkSaveConfig(configDir, persistentDef, xmlopt) < 0) + return -1; + } + + return 0; +} diff --git a/src/conf/virnetworkobj.h b/src/conf/virnetworkobj.h index 7d34fa3204..d3847d3422 100644 --- a/src/conf/virnetworkobj.h +++ b/src/conf/virnetworkobj.h @@ -258,3 +258,24 @@ virNetworkObjListNumOfNetworks(virNetworkObjList *nets, void virNetworkObjListPrune(virNetworkObjList *nets, unsigned int flags); + +int +virNetworkObjUpdateModificationImpact(virNetworkObj *obj, + unsigned int *flags); + +char * +virNetworkObjGetMetadata(virNetworkObj *network, + int type, + const char *uri, + unsigned int flags); + +int +virNetworkObjSetMetadata(virNetworkObj *network, + int type, + const char *metadata, + const char *key, + const char *uri, + virNetworkXMLOption *xmlopt, + const char *stateDir, + const char *configDir, + unsigned int flags); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index fb7ad9c855..c392bfd65a 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1326,6 +1326,7 @@ virNetworkObjUnrefMacMap; virNetworkObjUnsetDefTransient; virNetworkObjUpdate; virNetworkObjUpdateAssignDef; +virNetworkObjUpdateModificationImpact; # conf/virnetworkportdef.h diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index 9eb543a0a3..e776d86c73 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -3210,18 +3210,10 @@ networkUpdate(virNetworkPtr net, } } - /* VIR_NETWORK_UPDATE_AFFECT_CURRENT means "change LIVE if network - * is active, else change CONFIG - */ + if (virNetworkObjUpdateModificationImpact(obj, &flags) < 0) + goto cleanup; + isActive = virNetworkObjIsActive(obj); - if ((flags & (VIR_NETWORK_UPDATE_AFFECT_LIVE | - VIR_NETWORK_UPDATE_AFFECT_CONFIG)) == - VIR_NETWORK_UPDATE_AFFECT_CURRENT) { - if (isActive) - flags |= VIR_NETWORK_UPDATE_AFFECT_LIVE; - else - flags |= VIR_NETWORK_UPDATE_AFFECT_CONFIG; - } if (isActive && (flags & VIR_NETWORK_UPDATE_AFFECT_LIVE)) { /* Take care of anything that must be done before updating the diff --git a/src/test/test_driver.c b/src/test/test_driver.c index e7fce053b4..4c1df77f8b 100644 --- a/src/test/test_driver.c +++ b/src/test/test_driver.c @@ -5658,7 +5658,7 @@ testNetworkUpdate(virNetworkPtr net, { testDriver *privconn = net->conn->privateData; virNetworkObj *obj = NULL; - int isActive, ret = -1; + int ret = -1; virCheckFlags(VIR_NETWORK_UPDATE_AFFECT_LIVE | VIR_NETWORK_UPDATE_AFFECT_CONFIG, @@ -5667,18 +5667,8 @@ testNetworkUpdate(virNetworkPtr net, if (!(obj = testNetworkObjFindByUUID(privconn, net->uuid))) goto cleanup; - /* VIR_NETWORK_UPDATE_AFFECT_CURRENT means "change LIVE if network - * is active, else change CONFIG - */ - isActive = virNetworkObjIsActive(obj); - if ((flags & (VIR_NETWORK_UPDATE_AFFECT_LIVE - | VIR_NETWORK_UPDATE_AFFECT_CONFIG)) == - VIR_NETWORK_UPDATE_AFFECT_CURRENT) { - if (isActive) - flags |= VIR_NETWORK_UPDATE_AFFECT_LIVE; - else - flags |= VIR_NETWORK_UPDATE_AFFECT_CONFIG; - } + if (virNetworkObjUpdateModificationImpact(obj, &flags) < 0) + goto cleanup; /* update the network config in memory/on disk */ if (virNetworkObjUpdate(obj, command, section, -- 2.41.0