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network: define new API virNetworkUpdate

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This patch adds a new public API virNetworkUpdate that will permit
updating an existing network configuration without requiring that the
network be destroyed/restarted for the changes to take effect.
This commit is contained in:
Laine Stump 2012-08-19 23:35:47 -04:00
parent 76345dd43a
commit 574b9bc66b
4 changed files with 137 additions and 0 deletions
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66
include/libvirt/libvirt.h.in
View File

@ -2347,6 +2347,72 @@ virNetworkPtr virNetworkDefineXML (virConnectPtr conn,
*/
int virNetworkUndefine (virNetworkPtr network);
/**
* virNetworkUpdateCommand:
*
* describes which type of update to perform on a <network>
* definition.
*
*/
typedef enum {
VIR_NETWORK_UPDATE_COMMAND_NONE = 0, /* (invalid) */
VIR_NETWORK_UPDATE_COMMAND_MODIFY = 2, /* modify an existing element */
VIR_NETWORK_UPDATE_COMMAND_DELETE = 3, /* delete an existing element */
VIR_NETWORK_UPDATE_COMMAND_ADD_LAST = 4, /* add an element at end of list */
VIR_NETWORK_UPDATE_COMMAND_ADD_FIRST = 5, /* add an element at start of list */
#ifdef VIR_ENUM_SENTINELS
VIR_NETWORK_UPDATE_COMMAND_LAST
#endif
} virNetworkUpdateCommand;
/**
* virNetworkUpdateSection:
*
* describes which section of a <network> definition the provided
* xml should be applied to.
*
*/
typedef enum {
VIR_NETWORK_SECTION_NONE = 0, /* (invalid) */
VIR_NETWORK_SECTION_BRIDGE = 1, /* <bridge> */
VIR_NETWORK_SECTION_DOMAIN = 2, /* <domain> */
VIR_NETWORK_SECTION_IP = 3, /* <ip> */
VIR_NETWORK_SECTION_IP_DHCP_HOST = 4, /* <ip>/<dhcp>/<host> */
VIR_NETWORK_SECTION_IP_DHCP_RANGE = 5, /* <ip>/<dhcp>/<range> */
VIR_NETWORK_SECTION_FORWARD = 6, /* <forward> */
VIR_NETWORK_SECTION_FORWARD_INTERFACE = 7, /* <forward>/<interface> */
VIR_NETWORK_SECTION_FORWARD_PF = 8, /* <forward>/<pf> */
VIR_NETWORK_SECTION_PORTGROUP = 9, /* <portgroup> */
VIR_NETWORK_SECTION_DNS_HOST = 10, /* <dns>/<host> */
VIR_NETWORK_SECTION_DNS_TXT = 11, /* <dns>/<txt> */
VIR_NETWORK_SECTION_DNS_SRV = 12, /* <dns>/<srv> */
#ifdef VIR_ENUM_SENTINELS
VIR_NETWORK_SECTION_LAST
#endif
} virNetworkUpdateSection;
/**
* virNetworkUpdateFlags:
*
* Flags to control options for virNetworkUpdate()
*/
typedef enum {
VIR_NETWORK_UPDATE_AFFECT_CURRENT = 0, /* affect live if network is active,
config if it's not active */
VIR_NETWORK_UPDATE_AFFECT_LIVE = 1 << 0, /* affect live state of network only */
VIR_NETWORK_UPDATE_AFFECT_CONFIG = 1 << 1, /* affect persistent config only */
} virNetworkUpdateFlags;
/*
* Update an existing network definition
*/
int virNetworkUpdate(virNetworkPtr network,
unsigned int command, /* virNetworkUpdateCommand */
unsigned int section, /* virNetworkUpdateSection */
int parentIndex,
const char *xml,
unsigned int flags);
/*
* Activate persistent network
*/

8
src/driver.h
View File

@ -1119,6 +1119,13 @@ typedef virNetworkPtr
const char *xml);
typedef int
(*virDrvNetworkUndefine) (virNetworkPtr network);
typedef int
(*virDrvNetworkUpdate) (virNetworkPtr network,
unsigned int command, /* virNetworkUpdateCommand */
unsigned int section, /* virNetworkUpdateSection */
int parentIndex,
const char *xml,
unsigned int flags);
typedef int
(*virDrvNetworkCreate) (virNetworkPtr network);
typedef int
@ -1169,6 +1176,7 @@ struct _virNetworkDriver {
virDrvNetworkCreateXML networkCreateXML;
virDrvNetworkDefineXML networkDefineXML;
virDrvNetworkUndefine networkUndefine;
virDrvNetworkUpdate networkUpdate;
virDrvNetworkCreate networkCreate;
virDrvNetworkDestroy networkDestroy;
virDrvNetworkGetXMLDesc networkGetXMLDesc;

62
src/libvirt.c
View File

@ -10406,6 +10406,68 @@ error:
return -1;
}
/**
* virNetworkUpdate:
* @network: pointer to a defined network
* @section: which section of the network to update
* (see virNetworkUpdateSection for descriptions)
* @command: what action to perform (add/delete/modify)
* (see virNetworkUpdateCommand for descriptions)
* @parentIndex: which parent element, if there are multiple parents
* of the same type (e.g. which <ip> element when modifying
* a <dhcp>/<host> element), or "-1" for "don't care" or
* "automatically find appropriate one".
* @xml: the XML description for the network, preferably in UTF-8
* @flags: bitwise OR of virNetworkUpdateFlags.
*
* Update the definition of an existing network, either its live
* running state, its persistent configuration, or both.
*
* Returns 0 in case of success, -1 in case of error
*/
int
virNetworkUpdate(virNetworkPtr network,
unsigned int command, /* virNetworkUpdateCommand */
unsigned int section, /* virNetworkUpdateSection */
int parentIndex,
const char *xml,
unsigned int flags)
{
virConnectPtr conn;
VIR_DEBUG("network=%p, section=%d, parentIndex=%d, xml=%s, flags=0x%x",
network, section, parentIndex, xml, flags);
virResetLastError();
if (!VIR_IS_CONNECTED_NETWORK(network)) {
virLibNetworkError(VIR_ERR_INVALID_NETWORK, __FUNCTION__);
virDispatchError(NULL);
return -1;
}
conn = network->conn;
if (conn->flags & VIR_CONNECT_RO) {
virLibNetworkError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
goto error;
}
virCheckNonNullArgGoto(xml, error);
if (conn->networkDriver && conn->networkDriver->networkUpdate) {
int ret;
ret = conn->networkDriver->networkUpdate(network, section, command,
parentIndex, xml, flags);
if (ret < 0)
goto error;
return ret;
}
virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
error:
virDispatchError(network->conn);
return -1;
}
/**
* virNetworkCreate:
* @network: pointer to a defined network

1
src/libvirt_public.syms
View File

@ -563,6 +563,7 @@ LIBVIRT_0.10.2 {
virConnectListAllSecrets;
virConnectListAllStoragePools;
virDomainBlockCommit;
virNetworkUpdate;
virNodeGetMemoryParameters;
virNodeSetMemoryParameters;
virStoragePoolListAllVolumes;