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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_funcs.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_funcs.h')
-rw-r--r--src/vnet/interface_funcs.h25
1 files changed, 16 insertions, 9 deletions
diff --git a/src/vnet/interface_funcs.h b/src/vnet/interface_funcs.h
index e1568e33b5d..c4dd3b72e51 100644
--- a/src/vnet/interface_funcs.h
+++ b/src/vnet/interface_funcs.h
@@ -262,20 +262,22 @@ vnet_hw_interface_get_flags (vnet_main_t * vnm, u32 hw_if_index)
return hw->flags;
}
-always_inline uword
-vnet_hw_interface_get_mtu (vnet_main_t * vnm, u32 hw_if_index,
- vlib_rx_or_tx_t dir)
+always_inline u32
+vnet_hw_interface_get_mtu (vnet_main_t * vnm, u32 hw_if_index)
{
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
- return hw->max_l3_packet_bytes[dir];
+ return hw->max_packet_bytes;
}
-always_inline uword
-vnet_sw_interface_get_mtu (vnet_main_t * vnm, u32 sw_if_index,
- vlib_rx_or_tx_t dir)
+always_inline u32
+vnet_sw_interface_get_mtu (vnet_main_t * vnm, u32 sw_if_index, vnet_mtu_t af)
{
- vnet_hw_interface_t *hw = vnet_get_sup_hw_interface (vnm, sw_if_index);
- return (hw->max_l3_packet_bytes[dir]);
+ vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);
+ u32 mtu;
+ mtu = sw->mtu[af] > 0 ? sw->mtu[af] : sw->mtu[VNET_MTU_L3];
+ if (mtu == 0)
+ return 9000; /* $$$ Deal with interface-types not setting MTU */
+ return mtu;
}
always_inline uword
@@ -339,6 +341,11 @@ clib_error_t *set_hw_interface_change_rx_mode (vnet_main_t * vnm,
/* Set the MTU on the HW interface */
void vnet_hw_interface_set_mtu (vnet_main_t * vnm, u32 hw_if_index, u32 mtu);
+/* Set the MTU on the SW interface */
+void vnet_sw_interface_set_mtu (vnet_main_t * vnm, u32 sw_if_index, u32 mtu);
+void vnet_sw_interface_set_protocol_mtu (vnet_main_t * vnm, u32 sw_if_index,
+ u32 mtu[]);
+
/* update the unnumbered state of an interface */
void vnet_sw_interface_update_unnumbered (u32 sw_if_index,
u32 ip_sw_if_index, u8 enable);