zebra, lib/memtypes.c: the netlink sockets work per VRF

This patch lets the netlink sockets work per VRF.

* The definition of "struct nlsock" is moved into zebra/rib.h.

* The previous global variables "netlink" and "netlink_cmd" now
  become the members of "struct zebra_vrf", and are initialized
  in zebra_vrf_alloc().

* All relative functions now work for a specific VRF, by adding
  a new parameter which specifies the working VRF, except those
  functions in which the VRF ID can be obtained from the interface.

* kernel_init(), interface_list() and route_read() are now also
  working per VRF, and moved from main() to zebra_vrf_enable().

* A new function kernel_terminate() is added to release the
  netlink sockets. It is called from zebra_vrf_disable().

* Correct VRF ID, instead of the previous VRF_DEFAULT, are now
  passed to the functions of processing interfaces or route
  entries.

Signed-off-by: Feng Lu <lu.feng@6wind.com>
Reviewed-by: Alain Ritoux <alain.ritoux@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>

Conflicts:
	lib/memtypes.c
	zebra/rib.h
	zebra/rt_netlink.c

Conflicts:
	zebra/if_netlink.c
	zebra/if_sysctl.c
	zebra/kernel_null.c
	zebra/rib.h
	zebra/rt_netlink.c
	zebra/rt_netlink.h

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/memtypes.c b/lib/memtypes.c
index dafd471dd2..fc50443600 100644
--- a/lib/memtypes.c
+++ b/lib/memtypes.c
@@ -90,6 +90,7 @@ struct memory_list memory_list_zebra[] =
   { MTYPE_RIB_DEST,		"RIB destination"		},
   { MTYPE_RIB_TABLE_INFO,	"RIB table info"		},
   { MTYPE_RNH,		        "Nexthop tracking object"	},
+  { MTYPE_NETLINK_NAME,	        "Netlink name"			},
   { -1, NULL },
 };