ofp-table: Ignore bits that have to change according to OpenFlow.

OpenFlow table feature replies contain a per-table bitmap that indicates
which tables a flow can point to in goto_table actions.  OpenFlow requires
that a table only be able to go to higher-numbered tables.  This means that
a switch that is general as possible will always have different features
for every table, since each one will have a different bitmap.  This makes
the output of "ovs-ofctl dump-table-features" pretty long and ugly because
it has about 250 entries like this:

  table %d:
    metadata: match=0xffffffffffffffff write=0xffffffffffffffff
    max_entries=%d
    instructions (table miss and others):
      next tables: %d-253
      (same instructions)
      (same actions)
    (same matching)

This commit changes the logic that prints table features messages so that
it considers two sequentially numbered tables to be the same if only the
bit that necessarily must be tunred off changes.  This reduces the hundreds
of entries above to just:

   tables 1...253: ditto

which is so much more readable.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Justin Pettit <jpettit@ovn.org>

0 files changed, 0 insertions, 0 deletions