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b02475c53b
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>