Commit fbf46860 authored by Moses Reuben's avatar Moses Reuben Committed by Doug Ledford
Browse files

IB/core: Introduce inner flow steering 



For a tunneled packet which contains external and internal headers,
we refer to the external headers as "outer fields" and the internal
headers as "inner fields".

Example of a tunneled packet:

{ L2 | L3 | L4 | tunnel header | L2 | L3 | l4 | data }
  |     |    |         |         |    |    |
{       outer fields           }{ inner fields }

This patch introduces a new flag for flow steering rules
- IB_FLOW_SPEC_INNER - which specifies that the rule applies
to the inner fields, rather than to the outer fields of the packet.

Signed-off-by: default avatarMoses Reuben <mosesr@mellanox.com>
Reviewed-by: default avatarMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent ffb30d8f

drivers/infiniband/core/uverbs_cmd.c

+3 −1
Original line number Diff line number Diff line
@@ -3124,8 +3124,10 @@ static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec, 
	kern_spec_val = (void *)kern_spec +

		sizeof(struct ib_uverbs_flow_spec_hdr);

	kern_spec_mask = kern_spec_val + kern_filter_sz;

	if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))

		return -EINVAL;



	switch (ib_spec->type) {

	switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {

	case IB_FLOW_SPEC_ETH:

		ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);

		actual_filter_sz = spec_filter_size(kern_spec_mask,

include/rdma/ib_verbs.h

+9 −8
Original line number Diff line number Diff line
@@ -1601,9 +1601,10 @@ enum ib_flow_spec_type { 
	IB_FLOW_SPEC_TCP		= 0x40,

	IB_FLOW_SPEC_UDP		= 0x41,

	IB_FLOW_SPEC_VXLAN_TUNNEL	= 0x50,

	IB_FLOW_SPEC_INNER		= 0x100,

};

#define IB_FLOW_SPEC_LAYER_MASK	0xF0

#define IB_FLOW_SPEC_SUPPORT_LAYERS 4

#define IB_FLOW_SPEC_SUPPORT_LAYERS 8



/* Flow steering rule priority is set according to it's domain.

 * Lower domain value means higher priority.
@@ -1631,7 +1632,7 @@ struct ib_flow_eth_filter { 
};



struct ib_flow_spec_eth {

	enum ib_flow_spec_type	  type;

	u32			  type;

	u16			  size;

	struct ib_flow_eth_filter val;

	struct ib_flow_eth_filter mask;
@@ -1645,7 +1646,7 @@ struct ib_flow_ib_filter { 
};



struct ib_flow_spec_ib {

	enum ib_flow_spec_type	 type;

	u32			 type;

	u16			 size;

	struct ib_flow_ib_filter val;

	struct ib_flow_ib_filter mask;
@@ -1670,7 +1671,7 @@ struct ib_flow_ipv4_filter { 
};



struct ib_flow_spec_ipv4 {

	enum ib_flow_spec_type	   type;

	u32			   type;

	u16			   size;

	struct ib_flow_ipv4_filter val;

	struct ib_flow_ipv4_filter mask;
@@ -1688,7 +1689,7 @@ struct ib_flow_ipv6_filter { 
};



struct ib_flow_spec_ipv6 {

	enum ib_flow_spec_type	   type;

	u32			   type;

	u16			   size;

	struct ib_flow_ipv6_filter val;

	struct ib_flow_ipv6_filter mask;
@@ -1702,7 +1703,7 @@ struct ib_flow_tcp_udp_filter { 
};



struct ib_flow_spec_tcp_udp {

	enum ib_flow_spec_type	      type;

	u32			      type;

	u16			      size;

	struct ib_flow_tcp_udp_filter val;

	struct ib_flow_tcp_udp_filter mask;
@@ -1717,7 +1718,7 @@ struct ib_flow_tunnel_filter { 
 * the tunnel_id from val has the vni value

 */

struct ib_flow_spec_tunnel {

	enum ib_flow_spec_type	      type;

	u32			      type;

	u16			      size;

	struct ib_flow_tunnel_filter  val;

	struct ib_flow_tunnel_filter  mask;
@@ -1725,7 +1726,7 @@ struct ib_flow_spec_tunnel { 


union ib_flow_spec {

	struct {

		enum ib_flow_spec_type	type;

		u32			type;

		u16			size;

	};

	struct ib_flow_spec_eth		eth;

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