lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 29 Aug 2023 14:11:30 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Tristram.Ha@...rochip.com,
	Eric Dumazet <edumazet@...gle.com>,
	davem@...emloft.net,
	Woojung Huh <woojung.huh@...rochip.com>,
	Vladimir Oltean <olteanv@...il.com>
Cc: Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	UNGLinuxDriver@...rochip.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lukasz Majewski <lukma@...x.de>
Subject: [PATCH 2/4] net: dsa: Extend ksz9477 TAG setup to support HSR frames duplication

The KSZ9477 has support for HSR (High-Availability Seamless Redundancy).
One of its offloading (i.e. performed in the switch IC hardware) features
is to duplicate received frame to both HSR aware switch ports.

To achieve this goal - the tail TAG needs to be modified. To be more
specific, both ports must be marked as destination (egress) ones.

Moreover, according to AN3474 application note, the lookup bit (10)
should not be set in the tail tag.

Last but not least - the NETIF_F_HW_HSR_DUP flag indicates that the device
supports HSR and assures (in HSR core code) that frame is sent only once
from HOST to switch with tail tag indicating both ports.

Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
 net/dsa/tag_ksz.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index ea100bd25939..1410e7ed0f9a 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -293,6 +293,11 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb,
 	if (is_link_local_ether_addr(hdr->h_dest))
 		val |= KSZ9477_TAIL_TAG_OVERRIDE;
 
+	if (dev->features & NETIF_F_HW_HSR_DUP) {
+		val &= ~KSZ9477_TAIL_TAG_LOOKUP;
+		val |= dp->ds->hsr_ports;
+	}
+
 	*tag = cpu_to_be16(val);
 
 	return ksz_defer_xmit(dp, skb);
-- 
2.20.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ