Date: Mon, 25 Dec 2017 11:34:52 +0000 From: Meny Yossefi <menyy@mellanox.com> To: "freebsd-net@FreeBSD.org" <freebsd-net@FreeBSD.org> Cc: Konstantin Belousov <konstantinb@mellanox.com>, Hans Petter Selasky <hanss@mellanox.com>, Slava Shwartsman <slavash@mellanox.com>, Matthew Finlay <Matt@Mellanox.com> Subject: Setting priority per flow Message-ID: <VI1PR0501MB2863CA6BFE622355B4EA5E87C3010@VI1PR0501MB2863.eurprd05.prod.outlook.com>
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Hi all,
I'd like to set priority per flow in FreeBSD for PFC use.
In Linux, I can do so using a socket option (SO_PRIORITY) which eventually will be mapped into the PCP bits in the VLAN tag.
Is there a FreeBSD equivalent? So far I could only find an 'ifconfig' option to set PCP ('vlanpcp'), but that's only per VLAN interface, not a specific flow.
Also, is there a way to configure prio-tagging (priority over VLAN ID 0)? It seems that setting VLAN with ID 0 is not permitted:
sys/net/if_vlan.c, vlan_config() lines 1418:
/*
* Don't let the caller set up a VLAN VID with
* anything except VLID bits.
* VID numbers 0x0 and 0xFFF are reserved.
*/
if (vid == 0 || vid == 0xFFF || (vid & ~EVL_VLID_MASK))
return (EINVAL);
Nothing on the receive side suggests this case is being handled as well.
I Would appreciate an elaborated answer in case I'm missing something here.
Thanks in advance,
Meny
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