diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2025-06-23 16:17:16 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-06-25 15:24:14 -0700 |
| commit | f9dc3e52d821dc1f9afeec43fb1c18ac94bd587a (patch) | |
| tree | 4291ec2bff5125ad6394030c9cf1fb7153d3b05a /net/ethtool/netlink.c | |
| parent | 963781bdfe2007e062e05b6b8a263ae9340bd523 (diff) | |
net: ethtool: remove the data argument from ethtool_notify()
ethtool_notify() takes a const void *data argument, which presumably
was intended to pass information from the call site to the subcommand
handler. This argument currently has no users.
Expecting the data to be subcommand-specific has two complications.
Complication #1 is that its not plumbed thru any of the standardized
callbacks. It gets propagated to ethnl_default_notify() where it
remains unused. Coming from the ethnl_default_set_doit() side we pass
in NULL, because how could we have a command specific attribute in
a generic handler.
Complication #2 is that we expect the ethtool_notify() callers to
know what attribute type to pass in. Again, the data pointer is
untyped.
RSS will need to pass the context ID to the notifications.
I think it's a better design if the "subcommand" exports its own
typed interface and constructs the appropriate argument struct
(which will be req_info). Remove the unused data argument from
ethtool_notify() but retain it in a new internal helper which
subcommands can use to build a typed interface.
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20250623231720.3124717-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ethtool/netlink.c')
| -rw-r--r-- | net/ethtool/netlink.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index c5ec3c82ab2e..129f9d56ac65 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -911,7 +911,7 @@ static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) swap(dev->cfg, dev->cfg_pending); if (!ret) goto out_ops; - ethtool_notify(dev, ops->set_ntf_cmd, NULL); + ethtool_notify(dev, ops->set_ntf_cmd); ret = 0; out_ops: @@ -1049,7 +1049,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = { [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, }; -void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) +void ethnl_notify(struct net_device *dev, unsigned int cmd, const void *data) { if (unlikely(!ethnl_ok)) return; @@ -1062,13 +1062,18 @@ void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", cmd, netdev_name(dev)); } + +void ethtool_notify(struct net_device *dev, unsigned int cmd) +{ + ethnl_notify(dev, cmd, NULL); +} EXPORT_SYMBOL(ethtool_notify); static void ethnl_notify_features(struct netdev_notifier_info *info) { struct net_device *dev = netdev_notifier_info_to_dev(info); - ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); + ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF); } static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, |