Date: Thu, 3 Jul 2014 20:16:48 +0000 (UTC) From: Luiz Otavio O Souza <loos@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r268235 - head/sys/mips/atheros Message-ID: <201407032016.s63KGmlu059017@svn.freebsd.org>
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Author: loos Date: Thu Jul 3 20:16:48 2014 New Revision: 268235 URL: http://svnweb.freebsd.org/changeset/base/268235 Log: Properly advertise that if_arge can handle long frames (if_arge is set to handle packets up to 1536 bytes) This fixes the need to frag that could happen when using vlans on top of if_arge (which is a common case for the use the switch ports as individual NICs). Previously to this commit any vlan setup with if_arge as parent would have the MTU of the parent interface reduced by the size of dot1q header (4 bytes). Tested on TP-Link 1043ND (where the WAN port is just a switch port setup to tag packets in a different VLAN than the LAN ports). Reported and tested by: Harm Weites (harm at weites.com) Modified: head/sys/mips/atheros/if_arge.c Modified: head/sys/mips/atheros/if_arge.c ============================================================================== --- head/sys/mips/atheros/if_arge.c Thu Jul 3 20:10:30 2014 (r268234) +++ head/sys/mips/atheros/if_arge.c Thu Jul 3 20:16:48 2014 (r268235) @@ -703,6 +703,9 @@ arge_attach(device_t dev) ifp->if_snd.ifq_maxlen = ifqmaxlen; IFQ_SET_READY(&ifp->if_snd); + /* Tell the upper layer(s) we support long frames. */ + ifp->if_capabilities |= IFCAP_VLAN_MTU; + ifp->if_capenable = ifp->if_capabilities; #ifdef DEVICE_POLLING ifp->if_capabilities |= IFCAP_POLLING;
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