Linux-libre 4.3.2-gnu

1 files changed, 326 insertions, 68 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 25dbb91e1..7d91f4612 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -18,6 +18,7 @@
 #include <net/rtnetlink.h>
 #include <net/switchdev.h>
 #include <linux/if_bridge.h>
+#include <linux/netpoll.h>
 #include "dsa_priv.h"
 
 /* slave mii_bus handling ***************************************************/
@@ -199,103 +200,212 @@ out:
 	return 0;
 }
 
-static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
-			     struct net_device *dev,
-			     const unsigned char *addr, u16 vid, u16 nlm_flags)
+static int dsa_bridge_check_vlan_range(struct dsa_switch *ds,
+				       const struct net_device *bridge,
+				       u16 vid_begin, u16 vid_end)
 {
+	struct dsa_slave_priv *p;
+	struct net_device *dev, *vlan_br;
+	DECLARE_BITMAP(members, DSA_MAX_PORTS);
+	DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
+	u16 vid;
+	int member, err;
+
+	if (!ds->drv->vlan_getnext || !vid_begin)
+		return -EOPNOTSUPP;
+
+	vid = vid_begin - 1;
+
+	do {
+		err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
+		if (err)
+			break;
+
+		if (vid > vid_end)
+			break;
+
+		member = find_first_bit(members, DSA_MAX_PORTS);
+		if (member == DSA_MAX_PORTS)
+			continue;
+
+		dev = ds->ports[member];
+		p = netdev_priv(dev);
+		vlan_br = p->bridge_dev;
+		if (vlan_br == bridge)
+			continue;
+
+		netdev_dbg(vlan_br, "hardware VLAN %d already in use\n", vid);
+		return -EOPNOTSUPP;
+	} while (vid < vid_end);
+
+	return err == -ENOENT ? 0 : err;
+}
+
+static int dsa_slave_port_vlan_add(struct net_device *dev,
+				   struct switchdev_obj *obj)
+{
+	struct switchdev_obj_vlan *vlan = &obj->u.vlan;
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct dsa_switch *ds = p->parent;
-	int ret = -EOPNOTSUPP;
+	u16 vid;
+	int err;
 
-	if (ds->drv->fdb_add)
-		ret = ds->drv->fdb_add(ds, p->port, addr, vid);
+	switch (obj->trans) {
+	case SWITCHDEV_TRANS_PREPARE:
+		if (!ds->drv->port_vlan_add || !ds->drv->port_pvid_set)
+			return -EOPNOTSUPP;
 
-	return ret;
+		/* If the requested port doesn't belong to the same bridge as
+		 * the VLAN members, fallback to software VLAN (hopefully).
+		 */
+		err = dsa_bridge_check_vlan_range(ds, p->bridge_dev,
+						  vlan->vid_begin,
+						  vlan->vid_end);
+		if (err)
+			return err;
+		break;
+	case SWITCHDEV_TRANS_COMMIT:
+		for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+			err = ds->drv->port_vlan_add(ds, p->port, vid,
+						     vlan->flags &
+						     BRIDGE_VLAN_INFO_UNTAGGED);
+			if (!err && vlan->flags & BRIDGE_VLAN_INFO_PVID)
+				err = ds->drv->port_pvid_set(ds, p->port, vid);
+			if (err)
+				return err;
+		}
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
 }
 
-static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
-			     struct net_device *dev,
-			     const unsigned char *addr, u16 vid)
+static int dsa_slave_port_vlan_del(struct net_device *dev,
+				   struct switchdev_obj *obj)
 {
+	struct switchdev_obj_vlan *vlan = &obj->u.vlan;
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct dsa_switch *ds = p->parent;
-	int ret = -EOPNOTSUPP;
+	u16 vid;
+	int err;
 
-	if (ds->drv->fdb_del)
-		ret = ds->drv->fdb_del(ds, p->port, addr, vid);
+	if (!ds->drv->port_vlan_del)
+		return -EOPNOTSUPP;
 
-	return ret;
+	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
+		err = ds->drv->port_vlan_del(ds, p->port, vid);
+		if (err)
+			return err;
+	}
+
+	return 0;
 }
 
-static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
-			       const unsigned char *addr, u16 vid,
-			       bool is_static,
-			       u32 portid, u32 seq, int type,
-			       unsigned int flags)
+static int dsa_slave_port_vlan_dump(struct net_device *dev,
+				    struct switchdev_obj *obj)
 {
-	struct nlmsghdr *nlh;
-	struct ndmsg *ndm;
+	struct switchdev_obj_vlan *vlan = &obj->u.vlan;
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	DECLARE_BITMAP(members, DSA_MAX_PORTS);
+	DECLARE_BITMAP(untagged, DSA_MAX_PORTS);
+	u16 pvid, vid = 0;
+	int err;
 
-	nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
-	if (!nlh)
-		return -EMSGSIZE;
+	if (!ds->drv->vlan_getnext || !ds->drv->port_pvid_get)
+		return -EOPNOTSUPP;
 
-	ndm = nlmsg_data(nlh);
-	ndm->ndm_family	 = AF_BRIDGE;
-	ndm->ndm_pad1    = 0;
-	ndm->ndm_pad2    = 0;
-	ndm->ndm_flags	 = NTF_EXT_LEARNED;
-	ndm->ndm_type	 = 0;
-	ndm->ndm_ifindex = dev->ifindex;
-	ndm->ndm_state   = is_static ? NUD_NOARP : NUD_REACHABLE;
+	err = ds->drv->port_pvid_get(ds, p->port, &pvid);
+	if (err)
+		return err;
 
-	if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
-		goto nla_put_failure;
+	for (;;) {
+		err = ds->drv->vlan_getnext(ds, &vid, members, untagged);
+		if (err)
+			break;
 
-	if (vid && nla_put_u16(skb, NDA_VLAN, vid))
-		goto nla_put_failure;
+		if (!test_bit(p->port, members))
+			continue;
 
-	nlmsg_end(skb, nlh);
-	return 0;
+		memset(vlan, 0, sizeof(*vlan));
+		vlan->vid_begin = vlan->vid_end = vid;
+
+		if (vid == pvid)
+			vlan->flags |= BRIDGE_VLAN_INFO_PVID;
+
+		if (test_bit(p->port, untagged))
+			vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+		err = obj->cb(dev, obj);
+		if (err)
+			break;
+	}
+
+	return err == -ENOENT ? 0 : err;
+}
 
-nla_put_failure:
-	nlmsg_cancel(skb, nlh);
-	return -EMSGSIZE;
+static int dsa_slave_port_fdb_add(struct net_device *dev,
+				  struct switchdev_obj *obj)
+{
+	struct switchdev_obj_fdb *fdb = &obj->u.fdb;
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+	if (obj->trans == SWITCHDEV_TRANS_PREPARE)
+		ret = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
+	else if (obj->trans == SWITCHDEV_TRANS_COMMIT)
+		ret = ds->drv->port_fdb_add(ds, p->port, fdb->addr, fdb->vid);
+
+	return ret;
 }
 
-/* Dump information about entries, in response to GETNEIGH */
-static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
-			      struct net_device *dev,
-			      struct net_device *filter_dev, int idx)
+static int dsa_slave_port_fdb_del(struct net_device *dev,
+				  struct switchdev_obj *obj)
+{
+	struct switchdev_obj_fdb *fdb = &obj->u.fdb;
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	int ret = -EOPNOTSUPP;
+
+	if (ds->drv->port_fdb_del)
+		ret = ds->drv->port_fdb_del(ds, p->port, fdb->addr, fdb->vid);
+
+	return ret;
+}
+
+static int dsa_slave_port_fdb_dump(struct net_device *dev,
+				   struct switchdev_obj *obj)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct dsa_switch *ds = p->parent;
 	unsigned char addr[ETH_ALEN] = { 0 };
+	u16 vid = 0;
 	int ret;
 
-	if (!ds->drv->fdb_getnext)
+	if (!ds->drv->port_fdb_getnext)
 		return -EOPNOTSUPP;
 
-	for (; ; idx++) {
+	for (;;) {
 		bool is_static;
 
-		ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
+		ret = ds->drv->port_fdb_getnext(ds, p->port, addr, &vid,
+						&is_static);
 		if (ret < 0)
 			break;
 
-		if (idx < cb->args[0])
-			continue;
+		obj->u.fdb.addr = addr;
+		obj->u.fdb.vid = vid;
+		obj->u.fdb.ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
 
-		ret = dsa_slave_fill_info(dev, skb, addr, 0,
-					  is_static,
-					  NETLINK_CB(cb->skb).portid,
-					  cb->nlh->nlmsg_seq,
-					  RTM_NEWNEIGH, NLM_F_MULTI);
+		ret = obj->cb(dev, obj);
 		if (ret < 0)
 			break;
 	}
 
-	return idx;
+	return ret == -ENOENT ? 0 : ret;
 }
 
 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
@@ -368,6 +478,71 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
 	return ret;
 }
 
+static int dsa_slave_port_obj_add(struct net_device *dev,
+				  struct switchdev_obj *obj)
+{
+	int err;
+
+	/* For the prepare phase, ensure the full set of changes is feasable in
+	 * one go in order to signal a failure properly. If an operation is not
+	 * supported, return -EOPNOTSUPP.
+	 */
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_PORT_FDB:
+		err = dsa_slave_port_fdb_add(dev, obj);
+		break;
+	case SWITCHDEV_OBJ_PORT_VLAN:
+		err = dsa_slave_port_vlan_add(dev, obj);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+
+static int dsa_slave_port_obj_del(struct net_device *dev,
+				  struct switchdev_obj *obj)
+{
+	int err;
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_PORT_FDB:
+		err = dsa_slave_port_fdb_del(dev, obj);
+		break;
+	case SWITCHDEV_OBJ_PORT_VLAN:
+		err = dsa_slave_port_vlan_del(dev, obj);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+
+static int dsa_slave_port_obj_dump(struct net_device *dev,
+				   struct switchdev_obj *obj)
+{
+	int err;
+
+	switch (obj->id) {
+	case SWITCHDEV_OBJ_PORT_FDB:
+		err = dsa_slave_port_fdb_dump(dev, obj);
+		break;
+	case SWITCHDEV_OBJ_PORT_VLAN:
+		err = dsa_slave_port_vlan_dump(dev, obj);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+		break;
+	}
+
+	return err;
+}
+
 static int dsa_slave_bridge_port_join(struct net_device *dev,
 				      struct net_device *br)
 {
@@ -423,24 +598,53 @@ static int dsa_slave_port_attr_get(struct net_device *dev,
 	return 0;
 }
 
-static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
+static inline netdev_tx_t dsa_netpoll_send_skb(struct dsa_slave_priv *p,
+					       struct sk_buff *skb)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-
-	return p->xmit(skb, dev);
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	if (p->netpoll)
+		netpoll_send_skb(p->netpoll, skb);
+#else
+	BUG();
+#endif
+	return NETDEV_TX_OK;
 }
 
-static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
-					struct net_device *dev)
+static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct sk_buff *nskb;
+
+	dev->stats.tx_packets++;
+	dev->stats.tx_bytes += skb->len;
+
+	/* Transmit function may have to reallocate the original SKB */
+	nskb = p->xmit(skb, dev);
+	if (!nskb)
+		return NETDEV_TX_OK;
 
-	skb->dev = p->parent->dst->master_netdev;
-	dev_queue_xmit(skb);
+	/* SKB for netpoll still need to be mangled with the protocol-specific
+	 * tag to be successfully transmitted
+	 */
+	if (unlikely(netpoll_tx_running(dev)))
+		return dsa_netpoll_send_skb(p, nskb);
+
+	/* Queue the SKB for transmission on the parent interface, but
+	 * do not modify its EtherType
+	 */
+	nskb->dev = p->parent->dst->master_netdev;
+	dev_queue_xmit(nskb);
 
 	return NETDEV_TX_OK;
 }
 
+static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
+					    struct net_device *dev)
+{
+	/* Just return the original SKB */
+	return skb;
+}
+
 
 /* ethtool operations *******************************************************/
 static int
@@ -670,6 +874,49 @@ static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
 	return ret;
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static int dsa_slave_netpoll_setup(struct net_device *dev,
+				   struct netpoll_info *ni)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+	struct net_device *master = ds->dst->master_netdev;
+	struct netpoll *netpoll;
+	int err = 0;
+
+	netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
+	if (!netpoll)
+		return -ENOMEM;
+
+	err = __netpoll_setup(netpoll, master);
+	if (err) {
+		kfree(netpoll);
+		goto out;
+	}
+
+	p->netpoll = netpoll;
+out:
+	return err;
+}
+
+static void dsa_slave_netpoll_cleanup(struct net_device *dev)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct netpoll *netpoll = p->netpoll;
+
+	if (!netpoll)
+		return;
+
+	p->netpoll = NULL;
+
+	__netpoll_free_async(netpoll);
+}
+
+static void dsa_slave_poll_controller(struct net_device *dev)
+{
+}
+#endif
+
 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 	.get_settings		= dsa_slave_get_settings,
 	.set_settings		= dsa_slave_set_settings,
@@ -697,16 +944,27 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
 	.ndo_change_rx_flags	= dsa_slave_change_rx_flags,
 	.ndo_set_rx_mode	= dsa_slave_set_rx_mode,
 	.ndo_set_mac_address	= dsa_slave_set_mac_address,
-	.ndo_fdb_add		= dsa_slave_fdb_add,
-	.ndo_fdb_del		= dsa_slave_fdb_del,
-	.ndo_fdb_dump		= dsa_slave_fdb_dump,
+	.ndo_fdb_add		= switchdev_port_fdb_add,
+	.ndo_fdb_del		= switchdev_port_fdb_del,
+	.ndo_fdb_dump		= switchdev_port_fdb_dump,
 	.ndo_do_ioctl		= dsa_slave_ioctl,
 	.ndo_get_iflink		= dsa_slave_get_iflink,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_netpoll_setup	= dsa_slave_netpoll_setup,
+	.ndo_netpoll_cleanup	= dsa_slave_netpoll_cleanup,
+	.ndo_poll_controller	= dsa_slave_poll_controller,
+#endif
+	.ndo_bridge_getlink	= switchdev_port_bridge_getlink,
+	.ndo_bridge_setlink	= switchdev_port_bridge_setlink,
+	.ndo_bridge_dellink	= switchdev_port_bridge_dellink,
 };
 
 static const struct switchdev_ops dsa_slave_switchdev_ops = {
 	.switchdev_port_attr_get	= dsa_slave_port_attr_get,
 	.switchdev_port_attr_set	= dsa_slave_port_attr_set,
+	.switchdev_port_obj_add		= dsa_slave_port_obj_add,
+	.switchdev_port_obj_del		= dsa_slave_port_obj_del,
+	.switchdev_port_obj_dump	= dsa_slave_port_obj_dump,
 };
 
 static void dsa_slave_adjust_link(struct net_device *dev)
@@ -894,7 +1152,7 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 	slave_dev->features = master->vlan_features;
 	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
 	eth_hw_addr_inherit(slave_dev, master);
-	slave_dev->tx_queue_len = 0;
+	slave_dev->priv_flags |= IFF_NO_QUEUE;
 	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 	slave_dev->switchdev_ops = &dsa_slave_switchdev_ops;