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The current nwfilter tech driver API has a 'createRuleInstance' method which populates virNWFilterRuleInstPtr with a command line string containing variable placeholders. The 'applyNewRules' method then expands the variables and executes the commands. This split of responsibility won't work when switching to the virFirewallPtr APIs, since we can't just build up command line strings. This patch this merges the functionality of 'createRuleInstance' into the applyNewRules method. The virNWFilterRuleInstPtr struct is changed from holding an array of opaque pointers, into holding generic metadata about the rules to be processed. In essence this is the result of taking a linked set of virNWFilterDefPtr's and flattening the tree to get a list of virNWFilterRuleDefPtr's. At the same time we must keep track of any nested virNWFilterObjPtr instances, so that the locks are held for the duration of the 'applyNewRules' method. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
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>