Commit 1d8faf48 authored by Rony Efraim's avatar Rony Efraim Committed by David S. Miller
Browse files

net/core: Add VF link state control 



Add netlink directives and ndo entry to allow for controling
VF link, which can be in one of three states:

Auto - VF link state reflects the PF link state (default)

Up - VF link state is up, traffic from VF to VF works even if
the actual PF link is down

Down - VF link state is down, no traffic from/to this VF, can be of
use while configuring the VF

Signed-off-by: default avatarRony Efraim <ronye@mellanox.com>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3dc6475c

include/linux/if_link.h

+1 −0
Original line number Diff line number Diff line
@@ -12,5 +12,6 @@ struct ifla_vf_info { 
	__u32 qos;

	__u32 tx_rate;

	__u32 spoofchk;

	__u32 linkstate;

};

#endif /* _LINUX_IF_LINK_H */

include/linux/netdevice.h

+3 −0
Original line number Diff line number Diff line
@@ -829,6 +829,7 @@ struct netdev_fcoe_hbainfo { 
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);

 * int (*ndo_get_vf_config)(struct net_device *dev,

 *			    int vf, struct ifla_vf_info *ivf);

 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);

 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,

 *			  struct nlattr *port[]);

 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
@@ -986,6 +987,8 @@ struct net_device_ops { 
	int			(*ndo_get_vf_config)(struct net_device *dev,

						     int vf,

						     struct ifla_vf_info *ivf);

	int			(*ndo_set_vf_link_state)(struct net_device *dev,

							 int vf, int link_state);

	int			(*ndo_set_vf_port)(struct net_device *dev,

						   int vf,

						   struct nlattr *port[]);

include/uapi/linux/if_link.h

+13 −0
Original line number Diff line number Diff line
@@ -338,6 +338,7 @@ enum { 
	IFLA_VF_VLAN,

	IFLA_VF_TX_RATE,	/* TX Bandwidth Allocation */

	IFLA_VF_SPOOFCHK,	/* Spoof Checking on/off switch */

	IFLA_VF_LINK_STATE,	/* link state enable/disable/auto switch */

	__IFLA_VF_MAX,

};
@@ -364,6 +365,18 @@ struct ifla_vf_spoofchk { 
	__u32 setting;

};



enum {

	IFLA_VF_LINK_STATE_AUTO,	/* link state of the uplink */

	IFLA_VF_LINK_STATE_ENABLE,	/* link always up */

	IFLA_VF_LINK_STATE_DISABLE,	/* link always down */

	__IFLA_VF_LINK_STATE_MAX,

};



struct ifla_vf_link_state {

	__u32 vf;

	__u32 link_state;

};



/* VF ports management section

 *

 *	Nested layout of set/get msg is:

net/core/rtnetlink.c

+20 −2
Original line number Diff line number Diff line
@@ -947,6 +947,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
			struct ifla_vf_vlan vf_vlan;

			struct ifla_vf_tx_rate vf_tx_rate;

			struct ifla_vf_spoofchk vf_spoofchk;

			struct ifla_vf_link_state vf_linkstate;



			/*

			 * Not all SR-IOV capable drivers support the
@@ -956,18 +957,24 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
			 */

			ivi.spoofchk = -1;

			memset(ivi.mac, 0, sizeof(ivi.mac));

			/* The default value for VF link state is "auto"

			 * IFLA_VF_LINK_STATE_AUTO which equals zero

			 */

			ivi.linkstate = 0;

			if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi))

				break;

			vf_mac.vf =

				vf_vlan.vf =

				vf_tx_rate.vf =

				vf_spoofchk.vf = ivi.vf;

				vf_spoofchk.vf =

				vf_linkstate.vf = ivi.vf;



			memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));

			vf_vlan.vlan = ivi.vlan;

			vf_vlan.qos = ivi.qos;

			vf_tx_rate.rate = ivi.tx_rate;

			vf_spoofchk.setting = ivi.spoofchk;

			vf_linkstate.link_state = ivi.linkstate;

			vf = nla_nest_start(skb, IFLA_VF_INFO);

			if (!vf) {

				nla_nest_cancel(skb, vfinfo);
@@ -978,7 +985,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 
			    nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),

				    &vf_tx_rate) ||

			    nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),

				    &vf_spoofchk))

				    &vf_spoofchk) ||

			    nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),

				    &vf_linkstate))

				goto nla_put_failure;

			nla_nest_end(skb, vf);

		}
@@ -1238,6 +1247,15 @@ static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 
							       ivs->setting);

			break;

		}

		case IFLA_VF_LINK_STATE: {

			struct ifla_vf_link_state *ivl;

			ivl = nla_data(vf);

			err = -EOPNOTSUPP;

			if (ops->ndo_set_vf_link_state)

				err = ops->ndo_set_vf_link_state(dev, ivl->vf,

								 ivl->link_state);

			break;

		}

		default:

			err = -EINVAL;

			break;

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