netdev - Re: [PATCH net-next 2/2] net: dsa: lan9303: Add fdb/mdb manipulation

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:   Wed, 18 Oct 2017 10:38:08 -0400
From:   Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:     Egil Hjelmeland <privat@...l-hjelmeland.no>, andrew@...n.ch,
        f.fainelli@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Egil Hjelmeland <privat@...l-hjelmeland.no>
Subject: Re: [PATCH net-next 2/2] net: dsa: lan9303: Add fdb/mdb manipulation

Hi Egil,

Egil Hjelmeland <privat@...l-hjelmeland.no> writes:

> +/* Delete static port from ALR entry, delete entry if last port */
> +static int lan9303_alr_del_port(struct lan9303 *chip, const u8 *mac,
> +				int port)
> +{
> +	struct lan9303_alr_cache_entry *entr;
> +
> +	entr = lan9303_alr_cache_find_mac(chip, mac);
> +	if (!entr)
> +		return 0;  /* no static entry found */
> +		/* Question: Should we delete any learned entry?
> +		 * { lan9303_alr_set_entry(chip, mac, 0, false); return 0; }

.port_fdb_del is meant to remove the association between a port and a
MAC address in a given forwarding database. Deleting any learned entry
is therefore out of scope of this function.

Please mark such patchset as RFC next time so that the maintainer knows
that it is not meant to be applied.

> +		 */
> +
> +	entr->port_map &= ~BIT(port);
> +	if (entr->port_map == 0) /* zero means its free again */
> +		eth_zero_addr(&entr->port_map);
> +	lan9303_alr_set_entry(chip, mac, entr->port_map, entr->stp_override);
> +	return 0;
> +}

...

> +static int lan9303_port_fdb_add(struct dsa_switch *ds, int port,
> +				const unsigned char *addr, u16 vid)
> +{
> +	struct lan9303 *chip = ds->priv;
> +
> +	dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
> +	if (vid)
> +		return -EOPNOTSUPP;
> +	return lan9303_alr_add_port(chip, addr, port, false);
> +}
> +
> +static int lan9303_port_fdb_del(struct dsa_switch *ds, int port,
> +				const unsigned char *addr, u16 vid)
> +
> +{
> +	struct lan9303 *chip = ds->priv;
> +
> +	dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
> +	if (vid)
> +		return -EOPNOTSUPP;
> +	lan9303_alr_del_port(chip, addr, port);
> +	return 0;
> +}

I don't remember, this chip has a single forwarding database for the
whole switch, is that correct?


Thanks,

        Vivien