Commit 3ab87993 authored by Michal Kubecek's avatar Michal Kubecek Committed by David S. Miller
Browse files

ethtool: set pause parameters with PAUSE_SET request 



Implement PAUSE_SET netlink request to set pause parameters of a network
device. Thease are traditionally set with ETHTOOL_SPAUSEPARAM ioctl
request.

Signed-off-by: default avatarMichal Kubecek <mkubecek@suse.cz>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7f59fb32

Documentation/networking/ethtool-netlink.rst

+2 −1
Original line number Diff line number Diff line
@@ -200,6 +200,7 @@ Userspace to kernel: 
  ``ETHTOOL_MSG_COALESCE_GET``          get coalescing parameters

  ``ETHTOOL_MSG_COALESCE_SET``          set coalescing parameters

  ``ETHTOOL_MSG_PAUSE_GET``             get pause parameters

  ``ETHTOOL_MSG_PAUSE_SET``             set pause parameters

  ===================================== ================================



Kernel to userspace:
@@ -899,7 +900,7 @@ have their netlink replacement yet. 
  ``ETHTOOL_GRINGPARAM``              ``ETHTOOL_MSG_RINGS_GET``

  ``ETHTOOL_SRINGPARAM``              ``ETHTOOL_MSG_RINGS_SET``

  ``ETHTOOL_GPAUSEPARAM``             ``ETHTOOL_MSG_PAUSE_GET``

  ``ETHTOOL_SPAUSEPARAM``             n/a

  ``ETHTOOL_SPAUSEPARAM``             ``ETHTOOL_MSG_PAUSE_SET``

  ``ETHTOOL_GRXCSUM``                 ``ETHTOOL_MSG_FEATURES_GET``

  ``ETHTOOL_SRXCSUM``                 ``ETHTOOL_MSG_FEATURES_SET``

  ``ETHTOOL_GTXCSUM``                 ``ETHTOOL_MSG_FEATURES_GET``

include/uapi/linux/ethtool_netlink.h

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ enum { 
	ETHTOOL_MSG_COALESCE_GET,

	ETHTOOL_MSG_COALESCE_SET,

	ETHTOOL_MSG_PAUSE_GET,

	ETHTOOL_MSG_PAUSE_SET,



	/* add new constants above here */

	__ETHTOOL_MSG_USER_CNT,

net/ethtool/netlink.c

+5 −0
Original line number Diff line number Diff line
@@ -809,6 +809,11 @@ static const struct genl_ops ethtool_genl_ops[] = { 
		.dumpit	= ethnl_default_dumpit,

		.done	= ethnl_default_done,

	},

	{

		.cmd	= ETHTOOL_MSG_PAUSE_SET,

		.flags	= GENL_UNS_ADMIN_PERM,

		.doit	= ethnl_set_pause,

	},

};



static const struct genl_multicast_group ethtool_nl_mcgrps[] = {

net/ethtool/netlink.h

+1 −0
Original line number Diff line number Diff line
@@ -353,5 +353,6 @@ int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info); 
int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info);

int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info);

int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info);

int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info);



#endif /* _NET_ETHTOOL_NETLINK_H */

net/ethtool/pause.c

+61 −0
Original line number Diff line number Diff line
@@ -79,3 +79,64 @@ const struct ethnl_request_ops ethnl_pause_request_ops = { 
	.reply_size		= pause_reply_size,

	.fill_reply		= pause_fill_reply,

};



/* PAUSE_SET */



static const struct nla_policy

pause_set_policy[ETHTOOL_A_PAUSE_MAX + 1] = {

	[ETHTOOL_A_PAUSE_UNSPEC]		= { .type = NLA_REJECT },

	[ETHTOOL_A_PAUSE_HEADER]		= { .type = NLA_NESTED },

	[ETHTOOL_A_PAUSE_AUTONEG]		= { .type = NLA_U8 },

	[ETHTOOL_A_PAUSE_RX]			= { .type = NLA_U8 },

	[ETHTOOL_A_PAUSE_TX]			= { .type = NLA_U8 },

};



int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)

{

	struct nlattr *tb[ETHTOOL_A_PAUSE_MAX + 1];

	struct ethtool_pauseparam params = {};

	struct ethnl_req_info req_info = {};

	const struct ethtool_ops *ops;

	struct net_device *dev;

	bool mod = false;

	int ret;



	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb, ETHTOOL_A_PAUSE_MAX,

			  pause_set_policy, info->extack);

	if (ret < 0)

		return ret;

	ret = ethnl_parse_header_dev_get(&req_info,

					 tb[ETHTOOL_A_PAUSE_HEADER],

					 genl_info_net(info), info->extack,

					 true);

	if (ret < 0)

		return ret;

	dev = req_info.dev;

	ops = dev->ethtool_ops;

	ret = -EOPNOTSUPP;

	if (!ops->get_pauseparam || !ops->set_pauseparam)

		goto out_dev;



	rtnl_lock();

	ret = ethnl_ops_begin(dev);

	if (ret < 0)

		goto out_rtnl;

	ops->get_pauseparam(dev, &params);



	ethnl_update_bool32(&params.autoneg, tb[ETHTOOL_A_PAUSE_AUTONEG], &mod);

	ethnl_update_bool32(&params.rx_pause, tb[ETHTOOL_A_PAUSE_RX], &mod);

	ethnl_update_bool32(&params.tx_pause, tb[ETHTOOL_A_PAUSE_TX], &mod);

	ret = 0;

	if (!mod)

		goto out_ops;



	ret = dev->ethtool_ops->set_pauseparam(dev, &params);



out_ops:

	ethnl_ops_complete(dev);

out_rtnl:

	rtnl_unlock();

out_dev:

	dev_put(dev);

	return ret;

}

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