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Re: [libvirt] [PATCH 08/10] network: separate Start/Shutdown functions for new network types



On 07/08/2011 09:32 AM, Daniel P. Berrange wrote:
On Tue, Jul 05, 2011 at 03:45:56AM -0400, Laine Stump wrote:
Previously all networks were composed of bridge devices created and
managed by libvirt, and the same operations needed to be done for all
of them when they were started and stopped (create and start the
bridge device, configure its MAC address and IP address, add iptables
rules). The new network types are (for now at least) managed outside
of libvirt, and the network object is used only to contain information
about the network, which is then used as each individual guest
connects itself.

This means that when starting/stopping one of these new networks, we
really want to do nothing, aside from marking the network as
active/inactive.

This has been setup as toplevel Start/Shutdown functions that do the
small bit of common stuff, then have a switch statement to execute
network type-specific start/shutdown code, then do a bit more common
code. The type-specific functions called for the new host bridge and
macvtap based types are currently empty.

In the future these functions may actually do something, and we will
surely add more functions that are similarly patterned. Once
everything has settled, we can make a table of "sub-driver" function
pointers for each network type, and store a pointer to that table in
the network object, then we can replace the switch statements with
calls to functions in the table.

The final step in this will be to add a new table (and corresponding
new functions) for new network types as they are added.
---
  src/network/bridge_driver.c |  188 +++++++++++++++++++++++++++++++------------
  1 files changed, 138 insertions(+), 50 deletions(-)
ACK, there is pretty much no functional change for existing
network types.

+
+    VIR_INFO("Starting up network '%s'", network->def->name);
+    network->active = 1;
...

      network->active = 0;
We could take this opportunity to change to using a bool and
true/false


I think I'd rather do that in a separate patch - there are several other "ints used as booleans" in network_conf, domain_conf, and nwfilter_conf (at least) and it would probably be good to make them all consistent.



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