From 5b6d41ccb0193b013e9f282246c090e162d53cbd Mon Sep 17 00:00:00 2001 From: K Shiva Kiran Date: Thu, 17 Aug 2023 00:17:10 +0530 Subject: [PATCH] Adding Public Get and Set APIs for Network Metadata This patch introduces public Get and Set APIs for modifying , <description> and <metadata> elements of the Network object. - Added enum virNetworkMetadataType to select one of the above elements to operate on. - Added error code and messages for missing metadata. - Added public API implementation. - Added driver support. Signed-off-by: K Shiva Kiran <shiva_kr@riseup.net> Reviewed-by: Michal Privoznik <mprivozn@redhat.com> --- include/libvirt/libvirt-network.h | 29 ++++++ include/libvirt/virterror.h | 1 + src/driver-network.h | 16 +++ src/libvirt-network.c | 167 ++++++++++++++++++++++++++++++ src/libvirt_public.syms | 6 ++ src/util/virerror.c | 3 + 6 files changed, 222 insertions(+) diff --git a/include/libvirt/libvirt-network.h b/include/libvirt/libvirt-network.h index 90cde0cf24..0f7ad8300f 100644 --- a/include/libvirt/libvirt-network.h +++ b/include/libvirt/libvirt-network.h @@ -547,4 +547,33 @@ virNetworkPortFree(virNetworkPortPtr port); int virNetworkPortRef(virNetworkPortPtr port); +/** + * virNetworkMetadataType: + * + * Since: 9.7.0 + */ +typedef enum { + VIR_NETWORK_METADATA_DESCRIPTION = 0, /* Operate on <description> (Since: 9.7.0) */ + VIR_NETWORK_METADATA_TITLE = 1, /* Operate on <title> (Since: 9.7.0) */ + VIR_NETWORK_METADATA_ELEMENT = 2, /* Operate on <metadata> (Since: 9.7.0) */ + +# ifdef VIR_ENUM_SENTINELS + VIR_NETWORK_METADATA_LAST /* (Since: 9.7.0) */ +# endif +} virNetworkMetadataType; + +int +virNetworkSetMetadata(virNetworkPtr network, + int type, + const char *metadata, + const char *key, + const char *uri, + unsigned int flags); + +char * +virNetworkGetMetadata(virNetworkPtr network, + int type, + const char *uri, + unsigned int flags); + #endif /* LIBVIRT_NETWORK_H */ diff --git a/include/libvirt/virterror.h b/include/libvirt/virterror.h index df13e4f11e..224eddc9e4 100644 --- a/include/libvirt/virterror.h +++ b/include/libvirt/virterror.h @@ -348,6 +348,7 @@ typedef enum { VIR_ERR_NO_HOSTNAME = 108, /* no domain's hostname found (Since: 6.1.0) */ VIR_ERR_CHECKPOINT_INCONSISTENT = 109, /* checkpoint can't be used (Since: 6.10.0) */ VIR_ERR_MULTIPLE_DOMAINS = 110, /* more than one matching domain found (Since: 7.1.0) */ + VIR_ERR_NO_NETWORK_METADATA = 111, /* Network metadata is not present (Since: 9.7.0) */ # ifdef VIR_ENUM_SENTINELS VIR_ERR_NUMBER_LAST /* (Since: 5.0.0) */ diff --git a/src/driver-network.h b/src/driver-network.h index 99efd4c8aa..1d19b013c9 100644 --- a/src/driver-network.h +++ b/src/driver-network.h @@ -161,6 +161,20 @@ typedef int virNetworkPortPtr **ports, unsigned int flags); +typedef int +(*virDrvNetworkSetMetadata)(virNetworkPtr network, + int type, + const char *metadata, + const char *key, + const char *uri, + unsigned int flags); + +typedef char * +(*virDrvNetworkGetMetadata)(virNetworkPtr network, + int type, + const char *uri, + unsigned int flags); + typedef struct _virNetworkDriver virNetworkDriver; /** @@ -202,4 +216,6 @@ struct _virNetworkDriver { virDrvNetworkPortGetParameters networkPortGetParameters; virDrvNetworkPortDelete networkPortDelete; virDrvNetworkListAllPorts networkListAllPorts; + virDrvNetworkSetMetadata networkSetMetadata; + virDrvNetworkGetMetadata networkGetMetadata; }; diff --git a/src/libvirt-network.c b/src/libvirt-network.c index 236dfe2f5d..c0daea3a60 100644 --- a/src/libvirt-network.c +++ b/src/libvirt-network.c @@ -1915,3 +1915,170 @@ virNetworkPortRef(virNetworkPortPtr port) virObjectRef(port); return 0; } + + +/** + * virNetworkSetMetadata: + * @network: a network object + * @type: type of metadata, from virNetworkMetadataType + * @metadata: new metadata text + * @key: XML namespace key, or NULL + * @uri: XML namespace URI, or NULL + * @flags: bitwise-OR of virNetworkUpdateFlags + * + * Sets the appropriate network element given by @type to the + * value of @metadata. A @type of VIR_NETWORK_METADATA_DESCRIPTION + * is free-form text; VIR_NETWORK_METADATA_TITLE is free-form, but no + * newlines are permitted, and should be short (although the length is + * not enforced). For these two options @key and @uri are irrelevant and + * must be set to NULL. + * + * For type VIR_NETWORK_METADATA_ELEMENT @metadata must be well-formed + * XML belonging to namespace defined by @uri with local name @key. + * + * Passing NULL for @metadata says to remove that element from the + * network XML (passing the empty string leaves the element present). + * + * The resulting metadata will be present in virNetworkGetXMLDesc(), + * as well as quick access through virNetworkGetMetadata(). + * + * @flags controls whether the live network state, persistent configuration, + * or both will be modified. + * + * Returns 0 on success, -1 in case of failure. + * + * Since: 9.7.0 + */ +int +virNetworkSetMetadata(virNetworkPtr network, + int type, + const char *metadata, + const char *key, + const char *uri, + unsigned int flags) +{ + virConnectPtr conn; + + VIR_DEBUG("network=%p, type=%d, metadata='%s', key='%s', uri='%s', flags=0x%x", + network, type, NULLSTR(metadata), NULLSTR(key), NULLSTR(uri), + flags); + + virResetLastError(); + + virCheckNetworkReturn(network, -1); + conn = network->conn; + + virCheckReadOnlyGoto(conn->flags, error); + + switch (type) { + case VIR_NETWORK_METADATA_TITLE: + if (metadata && strchr(metadata, '\n')) { + virReportInvalidArg(metadata, "%s", + _("metadata title can't contain " + "newlines")); + goto error; + } + G_GNUC_FALLTHROUGH; + case VIR_NETWORK_METADATA_DESCRIPTION: + virCheckNullArgGoto(uri, error); + virCheckNullArgGoto(key, error); + break; + case VIR_NETWORK_METADATA_ELEMENT: + virCheckNonNullArgGoto(uri, error); + if (metadata) + virCheckNonNullArgGoto(key, error); + break; + default: + /* For future expansion */ + break; + } + + if (conn->networkDriver->networkSetMetadata) { + int ret; + ret = conn->networkDriver->networkSetMetadata(network, type, metadata, key, uri, + flags); + if (ret < 0) + goto error; + return ret; + } + + virReportUnsupportedError(); + + error: + virDispatchError(network->conn); + return -1; +} + + +/** + * virNetworkGetMetadata: + * @network: a network object + * @type: type of metadata, from virNetworkMetadataType + * @uri: XML namespace identifier + * @flags: bitwise-OR of virNetworkUpdateFlags + * + * Retrieves the appropriate network element given by @type. + * If VIR_NETWORK_METADATA_ELEMENT is requested parameter @uri + * must be set to the name of the namespace the requested elements + * belong to, otherwise must be NULL. + * + * If an element of the network XML is not present, the resulting + * error will be VIR_ERR_NO_NETWORK_METADATA. This method forms + * a shortcut for seeing information from virNetworkSetMetadata() + * without having to go through virNetworkGetXMLDesc(). + * + * @flags controls whether the live network state or persistent + * configuration will be queried. + * + * Returns the metadata string on success (caller must free), + * or NULL in case of failure. + * + * Since: 9.7.0 + */ +char * +virNetworkGetMetadata(virNetworkPtr network, + int type, + const char *uri, + unsigned int flags) +{ + virConnectPtr conn; + + VIR_DEBUG("network=%p, type=%d, uri='%s', flags=0x%x", + network, type, NULLSTR(uri), flags); + + virResetLastError(); + + virCheckNetworkReturn(network, NULL); + + VIR_EXCLUSIVE_FLAGS_GOTO(VIR_NETWORK_UPDATE_AFFECT_LIVE, + VIR_NETWORK_UPDATE_AFFECT_CONFIG, + error); + + switch (type) { + case VIR_NETWORK_METADATA_TITLE: + case VIR_NETWORK_METADATA_DESCRIPTION: + virCheckNullArgGoto(uri, error); + break; + case VIR_NETWORK_METADATA_ELEMENT: + virCheckNonNullArgGoto(uri, error); + break; + default: + /* For future expansion */ + break; + } + + conn = network->conn; + + if (conn->networkDriver->networkGetMetadata) { + char *ret; + if (!(ret = conn->networkDriver->networkGetMetadata(network, type, uri, flags))) + goto error; + return ret; + } + + virReportUnsupportedError(); + + error: + virDispatchError(network->conn); + return NULL; +} diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms index 80742f268e..bd1e916d2a 100644 --- a/src/libvirt_public.syms +++ b/src/libvirt_public.syms @@ -932,4 +932,10 @@ LIBVIRT_9.0.0 { virDomainFDAssociate; } LIBVIRT_8.5.0; +LIBVIRT_9.7.0 { + global: + virNetworkGetMetadata; + virNetworkSetMetadata; +} LIBVIRT_9.0.0; + # .... define new API here using predicted next version number .... diff --git a/src/util/virerror.c b/src/util/virerror.c index 453f19514e..227a182417 100644 --- a/src/util/virerror.c +++ b/src/util/virerror.c @@ -1287,6 +1287,9 @@ static const virErrorMsgTuple virErrorMsgStrings[] = { [VIR_ERR_MULTIPLE_DOMAINS] = { N_("multiple matching domains found"), N_("multiple matching domains found: %1$s") }, + [VIR_ERR_NO_NETWORK_METADATA] = { + N_("metadata not found"), + N_("metadata not found: %1$s") }, }; G_STATIC_ASSERT(G_N_ELEMENTS(virErrorMsgStrings) == VIR_ERR_NUMBER_LAST);