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Merge branch 'ethtool-netlink-bug-fixes'

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Maxim Mikityanskiy says:

====================
ethtool-netlink bug fixes

This series contains a few bug fixes for ethtool-netlink. These bugs are
specific for the netlink interface, and the legacy ioctl interface is
not affected. These patches aim to have the same behavior in
ethtool-netlink as in the legacy ethtool.

Please also see the sibling series for the userspace tool.

v2 changes: Added Fixes tags.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2020-08-18 16:00:24 -07:00
commit 0df55a0336
1 changed files with 10 additions and 9 deletions
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19
net/ethtool/features.c
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@ -224,7 +224,9 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
DECLARE_BITMAP(wanted_diff_mask, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(active_diff_mask, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(old_active, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(old_wanted, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(new_active, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(new_wanted, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(req_wanted, NETDEV_FEATURE_COUNT);
DECLARE_BITMAP(req_mask, NETDEV_FEATURE_COUNT);
struct nlattr *tb[ETHTOOL_A_FEATURES_MAX + 1];
@ -250,6 +252,7 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
rtnl_lock();
ethnl_features_to_bitmap(old_active, dev->features);
ethnl_features_to_bitmap(old_wanted, dev->wanted_features);
ret = ethnl_parse_bitset(req_wanted, req_mask, NETDEV_FEATURE_COUNT,
tb[ETHTOOL_A_FEATURES_WANTED],
netdev_features_strings, info->extack);
@ -261,17 +264,15 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
goto out_rtnl;
}
/* set req_wanted bits not in req_mask from old_active */
/* set req_wanted bits not in req_mask from old_wanted */
bitmap_and(req_wanted, req_wanted, req_mask, NETDEV_FEATURE_COUNT);
bitmap_andnot(new_active, old_active, req_mask, NETDEV_FEATURE_COUNT);
bitmap_or(req_wanted, new_active, req_wanted, NETDEV_FEATURE_COUNT);
if (bitmap_equal(req_wanted, old_active, NETDEV_FEATURE_COUNT)) {
ret = 0;
goto out_rtnl;
}
dev->wanted_features = ethnl_bitmap_to_features(req_wanted);
bitmap_andnot(new_wanted, old_wanted, req_mask, NETDEV_FEATURE_COUNT);
bitmap_or(req_wanted, new_wanted, req_wanted, NETDEV_FEATURE_COUNT);
if (!bitmap_equal(req_wanted, old_wanted, NETDEV_FEATURE_COUNT)) {
dev->wanted_features &= ~dev->hw_features;
dev->wanted_features |= ethnl_bitmap_to_features(req_wanted) & dev->hw_features;
__netdev_update_features(dev);
}
ethnl_features_to_bitmap(new_active, dev->features);
mod = !bitmap_equal(old_active, new_active, NETDEV_FEATURE_COUNT);