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authorOle Troan <ot@cisco.com>2018-06-07 10:17:57 +0200
committerDamjan Marion <dmarion@me.com>2018-06-11 10:25:59 +0000
commitd723161e038d00e59766aa67a6a0dcc350227e4b (patch)
tree24f5a1d87ebdc0012f28d42aa80a9f5d760073bf /src/vnet/interface.h
parentf4fd0d4217ab6c41fe6b093871bd40ac130e6486 (diff)
MTU: Software interface / Per-protocol MTU support
This patch separates setting of hardware interfaec and software interface MTU. Software MTU is L2 payload MTU (i.e. not including L2 header). Per-protocol MTU for IPv4, IPv6 and MPLS can also be set. Currently only IP4, IP6 are enabled in adjacency / rewrite code. Documentation in src/vnet/MTU.md Change-Id: Iee2fd6f0bbc8210748dd8e073ab9fab87d323690 Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'src/vnet/interface.h')
-rw-r--r--src/vnet/interface.h27
1 files changed, 18 insertions, 9 deletions
diff --git a/src/vnet/interface.h b/src/vnet/interface.h
index 87addbe67be..b582dba7c8d 100644
--- a/src/vnet/interface.h
+++ b/src/vnet/interface.h
@@ -154,8 +154,10 @@ static void __vnet_interface_function_deinit_##tag##_##f (void) \
_VNET_INTERFACE_FUNCTION_DECL(f,hw_interface_add_del)
#define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION(f) \
_VNET_INTERFACE_FUNCTION_DECL(f,hw_interface_link_up_down)
-#define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(f,p) \
+#define VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO(f,p) \
_VNET_INTERFACE_FUNCTION_DECL_PRIO(f,hw_interface_link_up_down,p)
+#define VNET_SW_INTERFACE_MTU_CHANGE_FUNCTION(f) \
+ _VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_mtu_change)
#define VNET_SW_INTERFACE_ADD_DEL_FUNCTION(f) \
_VNET_INTERFACE_FUNCTION_DECL(f,sw_interface_add_del)
#define VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(f) \
@@ -537,14 +539,6 @@ typedef struct vnet_hw_interface_t
/* Largest packet size for this interface. */
u32 max_packet_bytes;
- /* Number of extra bytes that go on the wire.
- Packet length on wire
- = max (length + per_packet_overhead_bytes, min_packet_bytes). */
- u32 per_packet_overhead_bytes;
-
- /* Receive and transmit layer 3 packet size limits (MRU/MTU). */
- u32 max_l3_packet_bytes[VLIB_N_RX_TX];
-
/* Hash table mapping sub interface id to sw_if_index. */
uword *sub_interface_sw_if_index_by_id;
@@ -641,6 +635,18 @@ typedef enum
VNET_FLOOD_CLASS_NO_FLOOD,
} vnet_flood_class_t;
+/* Per protocol MTU */
+typedef enum
+{
+ VNET_MTU_L3, /* Default payload MTU (without L2 headers) */
+ VNET_MTU_IP4, /* Per-protocol MTUs overriding default */
+ VNET_MTU_IP6,
+ VNET_MTU_MPLS,
+ VNET_N_MTU
+} vnet_mtu_t;
+
+extern vnet_mtu_t vnet_link_to_mtu (vnet_link_t link);
+
/* Software-interface. This corresponds to a Ethernet VLAN, ATM vc, a
tunnel, etc. Configuration (e.g. IP address) gets attached to
software interface. */
@@ -684,6 +690,9 @@ typedef struct
/* VNET_SW_INTERFACE_TYPE_HARDWARE. */
u32 hw_if_index;
+ /* MTU for network layer (not including L2 headers) */
+ u32 mtu[VNET_N_MTU];
+
/* VNET_SW_INTERFACE_TYPE_SUB. */
vnet_sub_interface_t sub;