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-rw-r--r--src/include/ipxe/netdevice.h9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/include/ipxe/netdevice.h b/src/include/ipxe/netdevice.h
index a1d207ffc..d498ab697 100644
--- a/src/include/ipxe/netdevice.h
+++ b/src/include/ipxe/netdevice.h
@@ -397,9 +397,16 @@ struct net_device {
struct retry_timer link_block;
/** Maximum packet length
*
- * This length includes any link-layer headers.
+ * This is the maximum packet length (including any link-layer
+ * headers) supported by the hardware.
*/
size_t max_pkt_len;
+ /** Maximum transmission unit length
+ *
+ * This is the maximum transmission unit length (excluding any
+ * link-layer headers) configured for the link.
+ */
+ size_t mtu;
/** TX packet queue */
struct list_head tx_queue;
/** Deferred TX packet queue */