Currently, some ethtool link parameters, like speed, lanes and duplex, are
derived from the link_mode parameter. These link parameters are only
derived in __ethtool_get_link_ksettings(), but the ioctl path does not go
through this function. This means that old ethtool (w/o netlink) won't get
any reasonable values.
Add a function that derives the parameters from link_mode and use it in
ioctl paths as well.
Output before:
$ ethtool --version
ethtool version 5.4
$ ethtool swp13
Settings for swp13:
Supported ports: [ FIBRE Backplane ]
Supported link modes: 1000baseKX/Full
10000baseKR/Full
25000baseCR/Full
25000baseKR/Full
25000baseSR/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 1000baseKX/Full
10000baseKR/Full
25000baseCR/Full
25000baseKR/Full
25000baseSR/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: Unknown!
Duplex: Half
Port: Direct Attach Copper
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Link detected: yes
Output after:
$ ethtool swp13
Settings for swp13:
Supported ports: [ FIBRE Backplane ]
Supported link modes: 1000baseKX/Full
10000baseKR/Full
25000baseCR/Full
25000baseKR/Full
25000baseSR/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 1000baseKX/Full
10000baseKR/Full
25000baseCR/Full
25000baseKR/Full
25000baseSR/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 25000Mb/s
Duplex: Full
Port: Direct Attach Copper
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Link detected: yes
Fixes: c8907043c6ac9 ("ethtool: Get link mode in use instead of speed and
duplex parameters")
Signed-off-by: Danielle Ratson <daniel...@nvidia.com>
Reported-by: Ido Schimmel <ido...@nvidia.com>
Reviewed-by: Ido Schimmel <ido...@nvidia.com>
---
net/ethtool/ioctl.c | 38 ++++++++++++++++++++++++++------------
1 file changed, 26 insertions(+), 12 deletions(-)
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index cebbf93b27a7..943162ef080c 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -422,11 +422,31 @@ struct ethtool_link_usettings {
} link_modes;
};
+static int
+ethtool_params_from_link_mode(const struct net_device *dev,
+ struct ethtool_link_ksettings *link_ksettings)
+{
+ const struct link_mode_info *link_info;
+
+ if (dev->ethtool_ops->cap_link_mode_supported &&
+ link_ksettings->link_mode != -1) {
+ if (WARN_ON_ONCE(link_ksettings->link_mode >=
+ __ETHTOOL_LINK_MODE_MASK_NBITS))
+ return -EINVAL;
+
+ link_info = &link_mode_params[link_ksettings->link_mode];
+ link_ksettings->base.speed = link_info->speed;
+ link_ksettings->lanes = link_info->lanes;
+ link_ksettings->base.duplex = link_info->duplex;
+ }
+
+ return 0;
+}
+
/* Internal kernel helper to query a device ethtool_link_settings. */
int __ethtool_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *link_ksettings)
{
- const struct link_mode_info *link_info;
int err;
ASSERT_RTNL();
@@ -440,17 +460,7 @@ int __ethtool_get_link_ksettings(struct net_device *dev,
if (err)
return err;
- if (dev->ethtool_ops->cap_link_mode_supported &&
- link_ksettings->link_mode != -1) {
- if (WARN_ON_ONCE(link_ksettings->link_mode >=
- __ETHTOOL_LINK_MODE_MASK_NBITS))
- return -EINVAL;
-
- link_info = &link_mode_params[link_ksettings->link_mode];
- link_ksettings->base.speed = link_info->speed;
- link_ksettings->lanes = link_info->lanes;
- link_ksettings->base.duplex = link_info->duplex;
- }
+ ethtool_params_from_link_mode(dev, link_ksettings);
return 0;
}
@@ -572,6 +582,8 @@ static int ethtool_get_link_ksettings(struct net_device
*dev,
if (err < 0)
return err;
+ ethtool_params_from_link_mode(dev, &link_ksettings);
+
/* make sure we tell the right values to user */
link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
link_ksettings.base.link_mode_masks_nwords
@@ -673,6 +685,8 @@ static int ethtool_get_settings(struct net_device *dev,
void __user *useraddr)
return err;
convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
+ ethtool_params_from_link_mode(dev, &link_ksettings);
+
/* send a sensible cmd tag back to user */
cmd.cmd = ETHTOOL_GSET;
--
2.26.2
