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MFP r287070,r287073: split radix implementation and route table structure.

Description

MFP r287070,r287073: split radix implementation and route table structure.

There are number of radix consumers in kernel land (pf,ipfw,nfs,route)

with different requirements. In fact, first 3 don't have _any_ requirements
and first 2 does not use radix locking. On the other hand, routing
structure do have these requirements (rnh_gen, multipath, custom
to-be-added control plane functions, different locking).

Additionally, radix should not known anything about its consumers internals.

So, radix code now uses tiny 'struct radix_head' structure along with

internal 'struct radix_mask_head' instead of 'struct radix_node_head'.
Existing consumers still uses the same 'struct radix_node_head' with
slight modifications: they need to pass pointer to (embedded)
'struct radix_head' to all radix callbacks.

Routing code now uses new 'struct rib_head' with different locking macro:

RADIX_NODE_HEAD prefix was renamed to RIB_ (which stands for routing
information base).

New net/route_var.h header was added to hold routing subsystem internal

data. 'struct rib_head' was placed there. 'struct rtentry' will also
be moved there soon.

Details

Committed
melifaroJan 25 2016, 6:33 AM
Parents
rS294705: hyperv/vmbus: Avoid extra copy of page information.
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