tests: Rename "ofproto-if"->"ofproto-dpif"

It's unclear why these tests are named "ofproto-if..." unlike all of the
other ofproto-dpif tests. Rename them to be more consistent.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Simon Horman <horms@verge.net.au>
revalidator: Refactor ukey creation/lookup.

This patch refactors the code around ukey creation and lookup to
simplify the code for callers. A new function ukey_acquire() combines
these functions and attempts to acquire a lock on the ukey. Failure to
acquire a lock on the ukey is usually a sign that another thread is
handling the same flow concurrently, which means the flow does not need
to be handled anyway.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
revalidator: Use xcache when revalidation is required.

One of the reasons that xlate_cache was introduced was to ensure that
statistics were attributed to the correct rules and interfaces according
to the flow that was installed into the datapath, rather than according
to the current state of the flow table.

This patch makes the revalidators use the xlate_cache to attribute stats
when full revalidation is required, as the statistics belong to the old
ruleset. However, when revalidating, the rules may have changed while
leaving the datapath flows intact, so we still re-create the xcache at
that point.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Alex Wang <alexw@nicira.com>