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Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
8d9d098b6d
We haven't had a release with network events yet, so we are free to fix the RPC so that it actually does what we want. Doing client-side filtering of per-network events is inefficient if a connection is only interested in events on a single network out of hundreds available on the server. But to do server-side per-network filtering, the server needs to know which network to filter on - so we need to pass an optional network over on registration. Furthermore, it is possible to have a client with both a global and per-network filter; in the existing code, the server sends only one event and the client replicates to both callbacks. But with server-side filtering, the server will send the event twice, so we need a way for the client to know which callbackID is sending an event, to ensure that the client can filter out events from a registration that does not match the callbackID from the server. Likewise, the existing style of deregistering by eventID alone is fine; but in the new style, we have to remember which callbackID to delete. This patch fixes the RPC wire definition to contain all the needed pieces of information, and hooks into the server and client side improvements of the previous patches, in order to switch over to full server-side filtering of network events. Also, since we fixed this in time, all released versions of libvirtd that support network events also support per-network filtering, so we can hard-code that assumption into network_event.c. Converting domain events to server-side filtering will require the introduction of new RPC numbers, as well as a server feature bit that the client can use to tell whether to use old-style (server only supports global events) or new-style (server supports filtered events), so that is deferred to a later set of patches. * src/conf/network_event.c (virNetworkEventStateRegisterClient): Assume server-side filtering. * src/remote/remote_protocol.x (remote_connect_network_event_register_any_args): Add network argument. (remote_connect_network_event_register_any_ret): Return callbackID instead of count. (remote_connect_network_event_deregister_any_args): Pass callbackID instead of eventID. (remote_connect_network_event_deregister_any_ret): Drop unused type. (remote_network_event_lifecycle_msg): Add callbackID. * daemon/remote.c (remoteDispatchConnectNetworkEventDeregisterAny): Drop unused arg, and deal with callbackID from client. (remoteRelayNetworkEventLifecycle): Pass callbackID. (remoteDispatchConnectNetworkEventRegisterAny): Likewise, and recognize non-NULL network. * src/remote/remote_driver.c (remoteConnectNetworkEventRegisterAny): Pass network, and track server side id. (remoteConnectNetworkEventDeregisterAny): Deregister by callback id. (remoteNetworkBuildEventLifecycle): Pass remote id to event queue. * src/remote_protocol-structs: Regenerate. Signed-off-by: Eric Blake <eblake@redhat.com> |
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| daemon | ||
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| examples | ||
| gnulib | ||
| include | ||
| m4 | ||
| po | ||
| src | ||
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| tools | ||
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| bootstrap | ||
| bootstrap.conf | ||
| cfg.mk | ||
| ChangeLog-old | ||
| config-post.h | ||
| configure.ac | ||
| COPYING | ||
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| HACKING | ||
| libvirt.pc.in | ||
| libvirt.spec.in | ||
| Makefile.am | ||
| Makefile.nonreentrant | ||
| mingw-libvirt.spec.in | ||
| README | ||
| README-hacking | ||
| run.in | ||
| TODO | ||
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>