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

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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>
This commit is contained in:
Ariel Levkovich
2018-05-13 14:33:29 +03:00
committed by Jason Gunthorpe
parent e822ff213f
commit 20b6563ba1
1 changed files with 27 additions and 0 deletions
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27
include/uapi/rdma/ib_user_verbs.h
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@@ -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;