netdev - Re: [PATCH v5 net-next 2/6] net: switchdev: add support for offloading of fdb locked flag

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]

Message-ID: <YwpjqpmG0YaisS9J@shredder>
Date:   Sat, 27 Aug 2022 21:34:18 +0300
From:   Ido Schimmel <idosch@...dia.com>
To:     Hans Schultz <netdev@...io-technology.com>
Cc:     davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Hauke Mehrtens <hauke@...ke-m.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Shuah Khan <shuah@...nel.org>,
        Christian Marangi <ansuelsmth@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Yuwei Wang <wangyuweihx@...il.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        bridge@...ts.linux-foundation.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v5 net-next 2/6] net: switchdev: add support for
 offloading of fdb locked flag

On Fri, Aug 26, 2022 at 01:45:34PM +0200, Hans Schultz wrote:
> @@ -1403,6 +1404,15 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
>  		if (!p)
>  			flags |= BIT(BR_FDB_LOCAL);
>  
> +		if (locked)
> +			flags |= BIT(BR_FDB_ENTRY_LOCKED);
> +
> +		if (blackhole)
> +			flags |= BIT(BR_FDB_BLACKHOLE);
> +
> +		if (sticky)
> +			flags |= BIT(BR_FDB_STICKY);
> +

While reviewing the test cases it occurred to me that the else branch
(FDB entry already exists) needs modifications as well. Something like:

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index e7f4fccb6adb..48f842a71597 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -1397,6 +1397,21 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
                        modified = true;
                }
 
+               if (local != test_bit(BR_FDB_LOCAL, &fdb->flags)) {
+                       change_bit(BR_FDB_LOCAL, &fdb->flags);
+                       modified = true;
+               }
+
+               if (locked != test_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags)) {
+                       change_bit(BR_FDB_ENTRY_LOCKED, &fdb->flags);
+                       modified = true;
+               }
+
+               if (blackhole != test_bit(BR_FDB_BLACKHOLE, &fdb->flags)) {
+                       change_bit(BR_FDB_BLACKHOLE, &fdb->flags);
+                       modified = true;
+               }
+
                if (swdev_notify)
                        set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags);

>  		fdb = fdb_create(br, p, addr, vid, flags);
>  		if (!fdb) {
>  			err = -ENOMEM;