Commit 20b6563b authored May 13, 2018 by Ariel Levkovich Committed by Jason Gunthorpe May 16, 2018

IB/uverbs: Expose GRE flow spec to the user-kernel ABI header



Add ib_uverbs_flow_spec_gre to define a rule to match the GRE
encapsulation protocol.

The spec includes the generic specs header, type, size and reserved
fields while the filter itself is defined as ib_uverbs_flow_gre_filter
and includes:
1. Checksum present bit, key present bit and version bits in a single
   16bit field.
2. Protocol type field - Indicates the ether protocol type of the
   encapsulated payload.
3. Key field - present if key bit is set and contains an application
   specific key value.

Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

parent e822ff21

include/uapi/rdma/ib_user_verbs.h

+27 −0

Original line number	Diff line number	Diff line
		@@ -1033,6 +1033,33 @@ struct ib_uverbs_flow_spec_esp {
		struct ib_uverbs_flow_spec_esp_filter mask;
		};

		struct ib_uverbs_flow_gre_filter {
		/* c_ks_res0_ver field is bits 0-15 in offset 0 of a standard GRE header:
		* bit 0 - C - checksum bit.
		* bit 1 - reserved. set to 0.
		* bit 2 - key bit.
		* bit 3 - sequence number bit.
		* bits 4:12 - reserved. set to 0.
		* bits 13:15 - GRE version.
		*/
		__be16 c_ks_res0_ver;
		__be16 protocol;
		__be32 key;
		};

		struct ib_uverbs_flow_spec_gre {
		union {
		struct ib_uverbs_flow_spec_hdr hdr;
		struct {
		__u32 type;
		__u16 size;
		__u16 reserved;
		};
		};
		struct ib_uverbs_flow_gre_filter val;
		struct ib_uverbs_flow_gre_filter mask;
		};

		struct ib_uverbs_flow_attr {
		__u32 type;
		__u16 size;