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ethtool: add PAUSE_NTF notification

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Send ETHTOOL_MSG_PAUSE_NTF notification whenever pause parameters of
a network device are modified using ETHTOOL_MSG_PAUSE_SET netlink message
or ETHTOOL_SPAUSEPARAM ioctl request.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Kubecek 2020-03-28 00:01:33 +01:00 committed by David S. Miller
parent 3ab879933d
commit bf37faa386
5 changed files with 12 additions and 1 deletions
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1
Documentation/networking/ethtool-netlink.rst
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@ -228,6 +228,7 @@ Kernel to userspace:
``ETHTOOL_MSG_COALESCE_GET_REPLY`` coalescing parameters ``ETHTOOL_MSG_COALESCE_GET_REPLY`` coalescing parameters
``ETHTOOL_MSG_COALESCE_NTF`` coalescing parameters ``ETHTOOL_MSG_COALESCE_NTF`` coalescing parameters
``ETHTOOL_MSG_PAUSE_GET_REPLY`` pause parameters ``ETHTOOL_MSG_PAUSE_GET_REPLY`` pause parameters
``ETHTOOL_MSG_PAUSE_NTF`` pause parameters
===================================== ================================= ===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device ``GET`` requests are sent by userspace applications to retrieve device

1
include/uapi/linux/ethtool_netlink.h
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@ -67,6 +67,7 @@ enum {
ETHTOOL_MSG_COALESCE_GET_REPLY, ETHTOOL_MSG_COALESCE_GET_REPLY,
ETHTOOL_MSG_COALESCE_NTF, ETHTOOL_MSG_COALESCE_NTF,
ETHTOOL_MSG_PAUSE_GET_REPLY, ETHTOOL_MSG_PAUSE_GET_REPLY,
ETHTOOL_MSG_PAUSE_NTF,
/* add new constants above here */ /* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT, __ETHTOOL_MSG_KERNEL_CNT,

6
net/ethtool/ioctl.c
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@ -1705,6 +1705,7 @@ static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
{ {
struct ethtool_pauseparam pauseparam; struct ethtool_pauseparam pauseparam;
int ret;
if (!dev->ethtool_ops->set_pauseparam) if (!dev->ethtool_ops->set_pauseparam)
return -EOPNOTSUPP; return -EOPNOTSUPP;
@ -1712,7 +1713,10 @@ static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
return -EFAULT; return -EFAULT;
return dev->ethtool_ops->set_pauseparam(dev, &pauseparam); ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
if (!ret)
ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
return ret;
} }
static int ethtool_self_test(struct net_device *dev, char __user *useraddr) static int ethtool_self_test(struct net_device *dev, char __user *useraddr)

2
net/ethtool/netlink.c
View File

@ -546,6 +546,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
[ETHTOOL_MSG_RINGS_NTF] = &ethnl_rings_request_ops, [ETHTOOL_MSG_RINGS_NTF] = &ethnl_rings_request_ops,
[ETHTOOL_MSG_CHANNELS_NTF] = &ethnl_channels_request_ops, [ETHTOOL_MSG_CHANNELS_NTF] = &ethnl_channels_request_ops,
[ETHTOOL_MSG_COALESCE_NTF] = &ethnl_coalesce_request_ops, [ETHTOOL_MSG_COALESCE_NTF] = &ethnl_coalesce_request_ops,
[ETHTOOL_MSG_PAUSE_NTF] = &ethnl_pause_request_ops,
}; };
/* default notification handler */ /* default notification handler */
@ -636,6 +637,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
[ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify,
}; };
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)

3
net/ethtool/pause.c
View File

@ -131,6 +131,9 @@ int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)
goto out_ops; goto out_ops;
ret = dev->ethtool_ops->set_pauseparam(dev, &params); ret = dev->ethtool_ops->set_pauseparam(dev, &params);
if (ret < 0)
goto out_ops;
ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
out_ops: out_ops:
ethnl_ops_complete(dev); ethnl_ops_complete(dev);