svn commit: r318331 - stable/11/sys/net

[Alexander Motin]

Author: mav
Date: Tue May 16 00:34:53 2017
New Revision: 318331
URL: https://svnweb.freebsd.org/changeset/base/318331

Log:
  MFC r317585: Propagate IFCAP_LRO from trunk to vlan interface.
  
  False positive here cost nothing, while false negative may lead to some
  confusions.

Modified:
  stable/11/sys/net/if_vlan.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/net/if_vlan.c
==============================================================================
--- stable/11/sys/net/if_vlan.c	Tue May 16 00:33:46 2017	(r318330)
+++ stable/11/sys/net/if_vlan.c	Tue May 16 00:34:53 2017	(r318331)
@@ -1583,6 +1583,16 @@ vlan_capabilities(struct ifvlan *ifv)
 	}
 
 	/*
+	 * If the parent interface can do LRO and checksum offloading on
+	 * VLANs, then guess it may do LRO on VLANs.  False positive here
+	 * cost nothing, while false negative may lead to some confusions.
+	 */
+	if (p->if_capabilities & IFCAP_VLAN_HWCSUM)
+		cap |= p->if_capabilities & IFCAP_LRO;
+	if (p->if_capenable & IFCAP_VLAN_HWCSUM)
+		ena |= p->if_capenable & IFCAP_LRO;
+
+	/*
 	 * If the parent interface can offload TCP connections over VLANs then
 	 * propagate its TOE capability to the VLAN interface.
 	 *