Add MPLS flow specification based on RFC 3032.
MPLS spec defined with tag field.
A MPLS allows stacking multiple labels in sequance.
In addition, the MPLS header can be encapsulted on top of different
layers, e.g.: ETH, IP (rfc4023), UDP (rfc7510), GRE (rfc4023).
Application should use the IBV_FLOW_ATTR_FLAGS_ORDERED_SPEC_LIST to define
the order in which the MPLS headers are encapsulated, as well as stacking
multiple such spec in sequance.
Signed-off-by: Alex Rosenbaum <alexr@xxxxxxxxxxxx>
---
libibverbs/man/ibv_create_flow.3 | 5 ++++-
libibverbs/verbs.h | 11 +++++++++++
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/libibverbs/man/ibv_create_flow.3 b/libibverbs/man/ibv_create_flow.3
index ee801fc..1519715 100644
--- a/libibverbs/man/ibv_create_flow.3
+++ b/libibverbs/man/ibv_create_flow.3
@@ -69,6 +69,7 @@ IBV_FLOW_SPEC_TCP = 0x40, /*
Flow specification of TCP h
IBV_FLOW_SPEC_UDP = 0x41, /* Flow
specification of UDP header */
IBV_FLOW_SPEC_VXLAN_TUNNEL = 0x50, /* Flow
specification of VXLAN header */
IBV_FLOW_SPEC_GRE = 0x51, /* Flow
specification of GRE header */
+IBV_FLOW_SPEC_MPLS = 0x60, /* Flow
specification of MPLS header */
IBV_FLOW_SPEC_INNER = 0x100, /* Flag
making L2/L3/L4 specifications to be applied on the inner header */
IBV_FLOW_SPEC_ACTION_TAG = 0x1000, /* Action tagging
matched packet */
IBV_FLOW_SPEC_ACTION_DROP = 0x1001, /* Action dropping
matched packet */
@@ -112,7 +113,9 @@ Alternatively, if an ibv_flow is created with flag
.BR IBV_FLOW_ATTR_FLAGS_ORDERED_SPEC_LIST\fR,
then the ibv_flow_spec_xxx rules order will be matched as a stricted pattern.
This mode allows the application to define a very precise network
header structure. This is very useful to represent many of the
encapsulation tunnel protocols.
-
+.br
+.B NOTE:
+IBV_FLOW_SPEC_MPLS flow spec type should be used with the
IBV_FLOW_ATTR_FLAGS_ORDERED_SPEC_LIST flag in order to strictly define
it's location in the protocol stack.
.SS ibv_destroy_flow()
destroys the flow
.I flow_id\fR.
diff --git a/libibverbs/verbs.h b/libibverbs/verbs.h
index 4f03bc9..04de6ea 100644
--- a/libibverbs/verbs.h
+++ b/libibverbs/verbs.h
@@ -1375,6 +1375,7 @@ enum ibv_flow_spec_type {
IBV_FLOW_SPEC_UDP = 0x41,
IBV_FLOW_SPEC_VXLAN_TUNNEL = 0x50,
IBV_FLOW_SPEC_GRE = 0x51,
+ IBV_FLOW_SPEC_MPLS = 0x60,
IBV_FLOW_SPEC_INNER = 0x100,
IBV_FLOW_SPEC_ACTION_TAG = 0x1000,
IBV_FLOW_SPEC_ACTION_DROP = 0x1001,
@@ -1466,6 +1467,16 @@ struct ibv_flow_spec_gre {
struct ibv_flow_gre_filter mask;
};
+struct ibv_mpls_filter {
+ uint32_t tag;
+};
+
+struct ibv_flow_spec_mpls {
+ enum ibv_flow_spec_type type;
+ uint16_t size;
+ struct ibv_mpls_filter val;
+ struct ibv_mpls_filter mask;
+};
struct ibv_flow_tunnel_filter {
uint32_t tunnel_id;
--
1.8.3.1
--
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