/**
* virNetlinkEventServiceStopAll:
*
* Stop all the monitors to receive netlink messages for libvirtd.
*
* Returns -1 if any monitor cannot be unregistered, 0 upon success
*/
int
virNetlinkEventServiceStopAll(void)
{
unsigned int i, j;
virNetlinkEventSrvPrivatePtr srv = NULL;
VIR_INFO("stopping all netlink event services");
for (i = 0; i < MAX_LINKS; i++) {
srv = server[i];
if (!srv)
continue;
virNetlinkEventServerLock(srv);
nl_close(srv->netlinknh);
virNetlinkFree(srv->netlinknh);
virEventRemoveHandle(srv->eventwatch);
for (j = 0; j < srv->handlesCount; j++) {
if (srv->handles[j].deleted == VIR_NETLINK_HANDLE_VALID)
virNetlinkEventRemoveClientPrimitive(j, i);
}
server[i] = NULL;
virNetlinkEventServerUnlock(srv);
virMutexDestroy(&srv->lock);
VIR_FREE(srv);
}
return 0;
}
/**
* virNetlinkEventServiceStop:
*
* stop the monitor to receive netlink messages for libvirtd.
* This removes the netlink socket fd from the event handler.
*
* @protocol: netlink protocol
*
* Returns -1 if the monitor cannot be unregistered, 0 upon success
*/
int
virNetlinkEventServiceStop(unsigned int protocol)
{
if (protocol >= MAX_LINKS)
return -EINVAL;
virNetlinkEventSrvPrivatePtr srv = server[protocol];
int i;
VIR_INFO("stopping netlink event service");
if (!server[protocol])
return 0;
virNetlinkEventServerLock(srv);
nl_close(srv->netlinknh);
virNetlinkFree(srv->netlinknh);
virEventRemoveHandle(srv->eventwatch);
/* free any remaining clients on the list */
for (i = 0; i < srv->handlesCount; i++) {
if (srv->handles[i].deleted == VIR_NETLINK_HANDLE_VALID)
virNetlinkEventRemoveClientPrimitive(i, protocol);
}
server[protocol] = NULL;
virNetlinkEventServerUnlock(srv);
virMutexDestroy(&srv->lock);
VIR_FREE(srv);
return 0;
}
/**
* virNetlinkEventRemoveClient:
*
* @watch: watch whose handle to remove
* @macaddr: macaddr whose handle to remove
* @protocol: netlink protocol
*
* Unregister a callback from a netlink monitor.
* The handler function referenced will no longer receive netlink messages.
* Either watch or macaddr may be used, the other should be null.
*
* Returns -1 if the file handle was not registered, 0 upon success
*/
int
virNetlinkEventRemoveClient(int watch, const virMacAddr *macaddr,
unsigned int protocol)
{
size_t i;
int ret = -1;
virNetlinkEventSrvPrivatePtr srv = NULL;
if (protocol >= MAX_LINKS)
return -EINVAL;
srv = server[protocol];
VIR_DEBUG("removing client watch=%d, mac=%p.", watch, macaddr);
if (watch <= 0 && !macaddr) {
VIR_WARN("Ignoring invalid netlink client id: %d", watch);
return -1;
}
virNetlinkEventServerLock(srv);
for (i = 0; i < srv->handlesCount; i++) {
if (srv->handles[i].deleted != VIR_NETLINK_HANDLE_VALID)
continue;
if ((watch && srv->handles[i].watch == watch) ||
(!watch &&
virMacAddrCmp(macaddr, &srv->handles[i].macaddr) == 0)) {
VIR_DEBUG("removed client: %d by %s.",
srv->handles[i].watch, watch ? "index" : "mac");
virNetlinkEventRemoveClientPrimitive(i, protocol);
ret = 0;
goto cleanup;
}
}
VIR_DEBUG("no client found to remove.");
cleanup:
virNetlinkEventServerUnlock(srv);
return ret;
}
/**
* virNetlinkEventRemoveClient:
*
* @watch: watch whose handle to remove
* @macaddr: macaddr whose handle to remove
*
* Unregister a callback from a netlink monitor.
* The handler function referenced will no longer receive netlink messages.
* Either watch or macaddr may be used, the other should be null.
*
* Returns -1 if the file handle was not registered, 0 upon success
*/
int
virNetlinkEventRemoveClient(int watch, const unsigned char *macaddr)
{
int i;
int ret = -1;
virNetlinkEventSrvPrivatePtr srv = server;
VIR_DEBUG("removing client watch=%d, mac=%p.", watch, macaddr);
if (watch <= 0 && !macaddr) {
VIR_WARN("Ignoring invalid netlink client id: %d", watch);
return -1;
}
virNetlinkEventServerLock(srv);
for (i = 0; i < srv->handlesCount; i++) {
if (srv->handles[i].deleted != VIR_NETLINK_HANDLE_VALID)
continue;
if ((watch && srv->handles[i].watch == watch) ||
(!watch &&
memcmp(macaddr, srv->handles[i].macaddr, VIR_MAC_BUFLEN) == 0)) {
VIR_DEBUG("removed client: %d by %s.",
srv->handles[i].watch, watch ? "index" : "mac");
virNetlinkEventRemoveClientPrimitive(i);
ret = 0;
goto cleanup;
}
}
VIR_DEBUG("no client found to remove.");
cleanup:
virNetlinkEventServerUnlock(srv);
return ret;
}
