[ovs-dev] [PATCH 4/8] ofproto-dpif: Make bfd and cfm notify ofproto-dpif when the status changes.

[Ben Pfaff]

On Fri, Apr 04, 2014 at 03:00:39PM -0700, Alex Wang wrote:
> This commit adds call-back function to the tunnel monitoring protocal
> bfd/cfm to allow the session to notify the ofproto-dpif whenever its
> status changes.  This helps eliminate the overhead of updating unchanged
> session status to the database.
> 
> Signed-off-by: Alex Wang <alexw at nicira.com>

I prefer to avoid callbacks, when I can.  Is it possible to avoid them
here?  One possible way would be to add a sequence number to cfm and
bfd objects; another way is to add a "changed" flag to cfm and bfd
flags and provide an interface to read it and reset it.