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Date: Wed, 27 Sep 2023 01:44:56 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Lukasz Majewski <lukma@...x.de>,
George McCollister <george.mccollister@...il.com>
Cc: Tristram.Ha@...rochip.com, Eric Dumazet <edumazet@...gle.com>,
Andrew Lunn <andrew@...n.ch>, davem@...emloft.net,
Woojung Huh <woojung.huh@...rochip.com>,
Oleksij Rempel <o.rempel@...gutronix.de>,
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,
Vladimir Oltean <vladimir.oltean@....com>,
Florian Fainelli <florian.fainelli@...adcom.com>
Subject: Re: [PATCH v6 net-next 1/5] net: dsa: propagate extack to
ds->ops->port_hsr_join()
On Fri, Sep 22, 2023 at 03:31:04PM +0200, Lukasz Majewski wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
>
> Drivers can provide meaningful error messages which state a reason why
> they can't perform an offload, and dsa_slave_changeupper() already has
> the infrastructure to propagate these over netlink rather than printing
> to the kernel log. So pass the extack argument and modify the xrs700x
> driver's port_hsr_join() prototype.
>
> Also take the opportunity and use the extack for the 2 -EOPNOTSUPP cases
> from xrs700x_hsr_join().
>
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> Signed-off-by: Lukasz Majewski <lukma@...x.de>
> Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
> ---
> Changes for v5:
> - New patch
> Changes for v6:
> - None
> ---
> drivers/net/dsa/xrs700x/xrs700x.c | 18 ++++++++++++------
> include/net/dsa.h | 3 ++-
> net/dsa/port.c | 5 +++--
> net/dsa/port.h | 3 ++-
> net/dsa/slave.c | 2 +-
> 5 files changed, 20 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/dsa/xrs700x/xrs700x.c b/drivers/net/dsa/xrs700x/xrs700x.c
> index 753fef757f11..5b02e9e426fd 100644
> --- a/drivers/net/dsa/xrs700x/xrs700x.c
> +++ b/drivers/net/dsa/xrs700x/xrs700x.c
> @@ -548,7 +548,8 @@ static void xrs700x_bridge_leave(struct dsa_switch *ds, int port,
> }
>
> static int xrs700x_hsr_join(struct dsa_switch *ds, int port,
> - struct net_device *hsr)
> + struct net_device *hsr,
> + struct netlink_ext_ack *extack)
> {
> unsigned int val = XRS_HSR_CFG_HSR_PRP;
> struct dsa_port *partner = NULL, *dp;
> @@ -562,16 +563,21 @@ static int xrs700x_hsr_join(struct dsa_switch *ds, int port,
> if (ret)
> return ret;
>
> - /* Only ports 1 and 2 can be HSR/PRP redundant ports. */
> - if (port != 1 && port != 2)
> + if (port != 1 && port != 2) {
> + NL_SET_ERR_MSG_MOD(extack,
> + "Only ports 1 and 2 can offload HSR/PRP");
> return -EOPNOTSUPP;
> + }
>
> - if (ver == HSR_V1)
> + if (ver == HSR_V1) {
> val |= XRS_HSR_CFG_HSR;
> - else if (ver == PRP_V1)
> + } else if (ver == PRP_V1) {
> val |= XRS_HSR_CFG_PRP;
> - else
> + } else {
> + NL_SET_ERR_MSG_MOD(extack,
> + "Only HSR v1 and PRP v1 can be offloaded");
> return -EOPNOTSUPP;
> + }
>
> dsa_hsr_foreach_port(dp, ds, hsr) {
> if (dp->index != port) {
> diff --git a/include/net/dsa.h b/include/net/dsa.h
> index 0b9c6aa27047..426724808e76 100644
> --- a/include/net/dsa.h
> +++ b/include/net/dsa.h
> @@ -1198,7 +1198,8 @@ struct dsa_switch_ops {
> * HSR integration
> */
> int (*port_hsr_join)(struct dsa_switch *ds, int port,
> - struct net_device *hsr);
> + struct net_device *hsr,
> + struct netlink_ext_ack *extack);
> int (*port_hsr_leave)(struct dsa_switch *ds, int port,
> struct net_device *hsr);
>
> diff --git a/net/dsa/port.c b/net/dsa/port.c
> index 37ab238e8304..5f01bd4f9dec 100644
> --- a/net/dsa/port.c
> +++ b/net/dsa/port.c
> @@ -2024,7 +2024,8 @@ void dsa_shared_port_link_unregister_of(struct dsa_port *dp)
> dsa_shared_port_setup_phy_of(dp, false);
> }
>
> -int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
> +int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr,
> + struct netlink_ext_ack *extack)
> {
> struct dsa_switch *ds = dp->ds;
> int err;
> @@ -2034,7 +2035,7 @@ int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
>
> dp->hsr_dev = hsr;
>
> - err = ds->ops->port_hsr_join(ds, dp->index, hsr);
> + err = ds->ops->port_hsr_join(ds, dp->index, hsr, extack);
> if (err)
> dp->hsr_dev = NULL;
>
> diff --git a/net/dsa/port.h b/net/dsa/port.h
> index dc812512fd0e..334879964e2c 100644
> --- a/net/dsa/port.h
> +++ b/net/dsa/port.h
> @@ -103,7 +103,8 @@ int dsa_port_phylink_create(struct dsa_port *dp);
> void dsa_port_phylink_destroy(struct dsa_port *dp);
> int dsa_shared_port_link_register_of(struct dsa_port *dp);
> void dsa_shared_port_link_unregister_of(struct dsa_port *dp);
> -int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
> +int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr,
> + struct netlink_ext_ack *extack);
> void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
> int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast);
> void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast);
> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
> index 48db91b33390..2b3d89b77121 100644
> --- a/net/dsa/slave.c
> +++ b/net/dsa/slave.c
> @@ -2862,7 +2862,7 @@ static int dsa_slave_changeupper(struct net_device *dev,
> }
> } else if (is_hsr_master(info->upper_dev)) {
> if (info->linking) {
> - err = dsa_port_hsr_join(dp, info->upper_dev);
> + err = dsa_port_hsr_join(dp, info->upper_dev, extack);
> if (err == -EOPNOTSUPP) {
> NL_SET_ERR_MSG_WEAK_MOD(extack,
> "Offloading not supported");
> --
> 2.20.1
>
It would have been good to Cc George here, for the driver-side patch.
But anyway, it looks ok.
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