PR/53562 CVS commit: src/sys

["Rin Okuyama" <rin%netbsd.org@localhost>]

The following reply was made to PR kern/53562; it has been noted by GNATS.

From: "Rin Okuyama" <rin%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/53562 CVS commit: src/sys
Date: Wed, 12 Dec 2018 01:46:47 +0000

 Module Name:	src
 Committed By:	rin
 Date:		Wed Dec 12 01:46:47 UTC 2018
 
 Modified Files:
 	src/sys/net: if.c if_bridge.c if_bridgevar.h
 	src/sys/rump/librump/rumpnet: net_stub.c
 
 Log Message:
 PR kern/53562
 
 Handle TX offload in software when a packet is sent via
 bridge_output(). We can send it as is in the following
 exceptional cases:
 
 For unicast:
 
 (1) When the destination interface is the same as source.
 
 (2) When the destination supports all TX offload options
     specified in a packet.
 
 For multicast/broadcast:
 
 (3) When all the members of the bridge support the specified
     TX offload options.
 
 For (3), add sc_csum_flags_tx flag to bridge softc, which is
 logical AND b/w capabilities of TX offload options in member
 interface (ifp->if_csum_flags_tx). The flag is updated when a
 member is (i) added to or (ii) removed from a bridge, or (iii)
 if_csum_flags_tx flag of a member interface is manipulated via
 ifconfig(8).
 
 Turn on M_CSUM_TSOv[46] bit in ifp->if_csum_flags_tx flag when
 TSO[46] is enabled for that interface.
 
 OK msaitoh thorpej
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.441 -r1.442 src/sys/net/if.c
 cvs rdiff -u -r1.160 -r1.161 src/sys/net/if_bridge.c
 cvs rdiff -u -r1.32 -r1.33 src/sys/net/if_bridgevar.h
 cvs rdiff -u -r1.36 -r1.37 src/sys/rump/librump/rumpnet/net_stub.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.