From: Vladimir Oltean <olteanv@gmail.com>
To: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
Cc: andrew@lunn.ch, netdev@vger.kernel.org, robh+dt@kernel.org,
UNGLinuxDriver@microchip.com, hkallweit1@gmail.com,
linux@armlinux.org.uk, davem@davemloft.net, kuba@kernel.org,
linux-kernel@vger.kernel.org, vivien.didelot@gmail.com,
f.fainelli@gmail.com, devicetree@vger.kernel.org
Subject: Re: [PATCH v2 net-next 7/9] net: dsa: microchip: add support for port mirror operations
Date: Thu, 22 Apr 2021 23:11:19 +0300 [thread overview]
Message-ID: <20210422201119.kalmeag53yun2j5x@skbuf> (raw)
In-Reply-To: <20210422094257.1641396-8-prasanna.vengateshan@microchip.com>
On Thu, Apr 22, 2021 at 03:12:55PM +0530, Prasanna Vengateshan wrote:
> Added support for port_mirror_add() and port_mirror_del operations
>
> Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
> ---
> drivers/net/dsa/microchip/lan937x_main.c | 50 ++++++++++++++++++++++++
> 1 file changed, 50 insertions(+)
>
> diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
> index 573d2dd906f5..bfce5098ea69 100644
> --- a/drivers/net/dsa/microchip/lan937x_main.c
> +++ b/drivers/net/dsa/microchip/lan937x_main.c
> @@ -128,6 +128,54 @@ static void lan937x_port_stp_state_set(struct dsa_switch *ds, int port,
> mutex_unlock(&dev->dev_mutex);
> }
>
> +static int lan937x_port_mirror_add(struct dsa_switch *ds, int port,
> + struct dsa_mall_mirror_tc_entry *mirror,
> + bool ingress)
> +{
> + struct ksz_device *dev = ds->priv;
> + int rc;
> +
> + if (ingress)
> + rc = lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
> + else
> + rc = lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);
> +
> + if (rc < 0)
> + return rc;
> +
> + rc = lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false);
> + if (rc < 0)
> + return rc;
This is odd, you shouldn't have to say 'the port which I'm sniffing is
not a sniffer'.
> +
> + /* configure mirror port */
> + rc = lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
> + PORT_MIRROR_SNIFFER, true);
> + if (rc < 0)
> + return rc;
> +
> + rc = lan937x_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);
> +
> + return rc;
> +}
> +
> +static void lan937x_port_mirror_del(struct dsa_switch *ds, int port,
> + struct dsa_mall_mirror_tc_entry *mirror)
> +{
> + struct ksz_device *dev = ds->priv;
> + u8 data;
> +
> + if (mirror->ingress)
> + lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
> + else
> + lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);
> +
> + lan937x_pread8(dev, port, P_MIRROR_CTRL, &data);
> +
> + if (!(data & (PORT_MIRROR_RX | PORT_MIRROR_TX)))
> + lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
> + PORT_MIRROR_SNIFFER, false);
> +}
> +
So let me understand. You have a PORT_MIRROR_SNIFFER setting per port.
Presumably the mirrored traffic inside the switch is sent to the ports
which have PORT_MIRROR_SNIFFER = true.
But this isn't the interpretation of the tc utility.
Instead, let's say you have the following sequence of commands:
tc filter add dev lan0 ingress matchall skip_sw action mirred egress mirror dev lan1
tc filter add dev lan2 ingress matchall skip_sw action mirred egress mirror dev lan3
What in your hardware configuration makes traffic from lan0 be mirrored
to lan1 but not to lan3?
> static phy_interface_t lan937x_get_interface(struct ksz_device *dev, int port)
> {
> phy_interface_t interface;
> @@ -396,6 +444,8 @@ const struct dsa_switch_ops lan937x_switch_ops = {
> .port_bridge_flags = lan937x_port_bridge_flags,
> .port_stp_state_set = lan937x_port_stp_state_set,
> .port_fast_age = ksz_port_fast_age,
> + .port_mirror_add = lan937x_port_mirror_add,
> + .port_mirror_del = lan937x_port_mirror_del,
> .port_max_mtu = lan937x_get_max_mtu,
> .port_change_mtu = lan937x_change_mtu,
> .phylink_validate = lan937x_phylink_validate,
> --
> 2.27.0
>
next prev parent reply other threads:[~2021-04-22 20:11 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-22 9:42 [PATCH v2 net-next 0/9] net: dsa: microchip: DSA driver support for LAN937x switch Prasanna Vengateshan
2021-04-22 9:42 ` [PATCH v2 net-next 1/9] dt-bindings: net: dsa: dt bindings for microchip lan937x Prasanna Vengateshan
2021-04-22 15:30 ` Rob Herring
2021-04-22 17:38 ` Rob Herring
2021-04-26 4:05 ` Prasanna Vengateshan
2021-04-26 16:04 ` Florian Fainelli
2021-04-22 9:42 ` [PATCH v2 net-next 2/9] net: phy: Add support for LAN937x T1 phy driver Prasanna Vengateshan
2021-04-22 12:45 ` Andrew Lunn
2021-04-26 4:06 ` Prasanna Vengateshan
2021-04-22 9:42 ` [PATCH v2 net-next 3/9] net: dsa: tag_ksz: add tag handling for Microchip LAN937x Prasanna Vengateshan
2021-04-22 19:18 ` Vladimir Oltean
2021-04-26 4:33 ` Prasanna Vengateshan
2021-04-26 12:27 ` Andrew Lunn
2021-04-22 9:42 ` [PATCH v2 net-next 4/9] net: dsa: microchip: add DSA support for microchip lan937x Prasanna Vengateshan
2021-04-22 19:59 ` Vladimir Oltean
2021-04-22 23:28 ` Andrew Lunn
2021-04-26 8:54 ` Prasanna Vengateshan
2021-04-26 12:34 ` Andrew Lunn
2021-04-27 7:43 ` Prasanna Vengateshan
2021-04-22 23:32 ` Andrew Lunn
2021-04-22 23:38 ` Andrew Lunn
2021-04-22 23:43 ` Andrew Lunn
2021-04-22 9:42 ` [PATCH v2 net-next 5/9] net: dsa: microchip: add support for phylink management Prasanna Vengateshan
2021-04-22 20:05 ` Vladimir Oltean
2021-04-22 9:42 ` [PATCH v2 net-next 6/9] net: dsa: microchip: add support for ethtool port counters Prasanna Vengateshan
2021-04-22 9:42 ` [PATCH v2 net-next 7/9] net: dsa: microchip: add support for port mirror operations Prasanna Vengateshan
2021-04-22 20:11 ` Vladimir Oltean [this message]
2021-04-22 9:42 ` [PATCH v2 net-next 8/9] net: dsa: microchip: add support for fdb and mdb management Prasanna Vengateshan
2021-04-22 9:42 ` [PATCH v2 net-next 9/9] net: dsa: microchip: add support for vlan operations Prasanna Vengateshan
2021-04-22 19:03 ` Vladimir Oltean
2021-05-06 14:51 ` Prasanna Vengateshan
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