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User-Space MPLS actions and matches

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This patch implements use-space datapath and non-datapath code
to match and use the datapath API set out in Leo Alterman's patch
"user-space datapath: Add basic MPLS support to kernel".

The resulting MPLS implementation supports:
* Pushing a single MPLS label
* Poping a single MPLS label
* Modifying an MPLS lable using set-field or load actions
  that act on the label value, tc and bos bit.
* There is no support for manipulating the TTL
  this is considered future work.

The single-level push pop limitation is implemented by processing
push, pop and set-field/load actions in order and discarding information
that would require multiple levels of push/pop to be supported.

e.g.
   push,push -> the first push is discarded
   pop,pop -> the first pop is discarded

This patch is based heavily on work by Ravi K.

Cc: Ravi K <rkerur@gmail.com>
Reviewed-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Simon Horman
2013-01-25 16:22:07 +09:00
committed by Ben Pfaff
parent d224e35014
commit b02475c53b
29 changed files with 1223 additions and 61 deletions
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20
lib/ofp-actions.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2012 Nicira, Inc.
* Copyright (c) 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -71,6 +71,8 @@
DEFINE_OFPACT(REG_MOVE, ofpact_reg_move, ofpact) \
DEFINE_OFPACT(REG_LOAD, ofpact_reg_load, ofpact) \
DEFINE_OFPACT(DEC_TTL, ofpact_cnt_ids, cnt_ids) \
DEFINE_OFPACT(PUSH_MPLS, ofpact_push_mpls, ofpact) \
DEFINE_OFPACT(POP_MPLS, ofpact_pop_mpls, ofpact) \
\
/* Metadata. */ \
DEFINE_OFPACT(SET_TUNNEL, ofpact_tunnel, ofpact) \
@@ -310,6 +312,22 @@ struct ofpact_reg_load {
union mf_subvalue subvalue; /* Least-significant bits are used. */
};
/* OFPACT_PUSH_VLAN/MPLS/PBB
*
* Used for NXAST_PUSH_MPLS, OFPAT11_PUSH_MPLS. */
struct ofpact_push_mpls {
struct ofpact ofpact;
ovs_be16 ethertype;
};
/* OFPACT_POP_MPLS
*
* Used for NXAST_POP_MPLS, OFPAT11_POP_MPLS.. */
struct ofpact_pop_mpls {
struct ofpact ofpact;
ovs_be16 ethertype;
};
/* OFPACT_SET_TUNNEL.
*
* Used for NXAST_SET_TUNNEL, NXAST_SET_TUNNEL64. */