*: Rearrange vrf_bitmap_X api to reduce memory footprint

When running all daemons with config for most of them, FRR has
sharpd@janelle:~/frr$ vtysh -c "show debug hashtable"  | grep "VRF BIT HASH" | wc -l
3570

3570 hashes for bitmaps associated with the vrf.  This is a very
large number of hashes.  Let's do two things:

a) Reduce the created size of the actually created hashes to 2
instead of 32.

b) Delay generation of the hash *until* a set operation happens.
As that no hash directly implies a unset value if/when checked.

This reduces the number of hashes to 61 in my setup for normal
operation.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

0 files changed, 0 insertions, 0 deletions