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net: dsa: propagate extack to ds->ops->port_hsr_join()
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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@nxp.com>
Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Vladimir Oltean authored and Paolo Abeni committed Oct 3, 2023
1 parent e27aca3 commit fefe5dc
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Showing 5 changed files with 20 additions and 11 deletions.
18 changes: 12 additions & 6 deletions drivers/net/dsa/xrs700x/xrs700x.c
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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) {
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3 changes: 2 additions & 1 deletion include/net/dsa.h
Original file line number Diff line number Diff line change
Expand Up @@ -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);

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5 changes: 3 additions & 2 deletions net/dsa/port.c
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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;

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3 changes: 2 additions & 1 deletion net/dsa/port.h
Original file line number Diff line number Diff line change
Expand Up @@ -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);
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2 changes: 1 addition & 1 deletion net/dsa/slave.c
Original file line number Diff line number Diff line change
Expand Up @@ -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");
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