nfs: disintegrate UAPI for nfs

This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently.  After these patches, userspace
headers will be segregated into:

        include/uapi/linux/.../foo.h

for the userspace interface stuff, and:

        include/linux/.../foo.h

for the strictly kernel internal stuff.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

3 files changed, 51 insertions, 14 deletions

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 6a09522..6d42c17 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -1063,12 +1063,6 @@ out:
 	return (err < 0 ? NETDEV_TX_BUSY : NETDEV_TX_OK);
 }
 
-static void lowpan_dev_free(struct net_device *dev)
-{
-	dev_put(lowpan_dev_info(dev)->real_dev);
-	free_netdev(dev);
-}
-
 static struct wpan_phy *lowpan_get_phy(const struct net_device *dev)
 {
 	struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
@@ -1118,7 +1112,7 @@ static void lowpan_setup(struct net_device *dev)
 	dev->netdev_ops		= &lowpan_netdev_ops;
 	dev->header_ops		= &lowpan_header_ops;
 	dev->ml_priv		= &lowpan_mlme;
-	dev->destructor		= lowpan_dev_free;
+	dev->destructor		= free_netdev;
 }
 
 static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
@@ -1133,6 +1127,8 @@ static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
 static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
 	struct packet_type *pt, struct net_device *orig_dev)
 {
+	struct sk_buff *local_skb;
+
 	if (!netif_running(dev))
 		goto drop;
 
@@ -1144,7 +1140,12 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
 	case LOWPAN_DISPATCH_IPHC:	/* ipv6 datagram */
 	case LOWPAN_DISPATCH_FRAG1:	/* first fragment header */
 	case LOWPAN_DISPATCH_FRAGN:	/* next fragments headers */
-		lowpan_process_data(skb);
+		local_skb = skb_clone(skb, GFP_ATOMIC);
+		if (!local_skb)
+			goto drop;
+		lowpan_process_data(local_skb);
+
+		kfree_skb(skb);
 		break;
 	default:
 		break;
@@ -1237,6 +1238,34 @@ static inline void __init lowpan_netlink_fini(void)
 	rtnl_link_unregister(&lowpan_link_ops);
 }
 
+static int lowpan_device_event(struct notifier_block *unused,
+				unsigned long event,
+				void *ptr)
+{
+	struct net_device *dev = ptr;
+	LIST_HEAD(del_list);
+	struct lowpan_dev_record *entry, *tmp;
+
+	if (dev->type != ARPHRD_IEEE802154)
+		goto out;
+
+	if (event == NETDEV_UNREGISTER) {
+		list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
+			if (lowpan_dev_info(entry->ldev)->real_dev == dev)
+				lowpan_dellink(entry->ldev, &del_list);
+		}
+
+		unregister_netdevice_many(&del_list);
+	}
+
+out:
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block lowpan_dev_notifier = {
+	.notifier_call = lowpan_device_event,
+};
+
 static struct packet_type lowpan_packet_type = {
 	.type = __constant_htons(ETH_P_IEEE802154),
 	.func = lowpan_rcv,
@@ -1251,6 +1280,12 @@ static int __init lowpan_init_module(void)
 		goto out;
 
 	dev_add_pack(&lowpan_packet_type);
+
+	err = register_netdevice_notifier(&lowpan_dev_notifier);
+	if (err < 0) {
+		dev_remove_pack(&lowpan_packet_type);
+		lowpan_netlink_fini();
+	}
 out:
 	return err;
 }
@@ -1263,6 +1298,8 @@ static void __exit lowpan_cleanup_module(void)
 
 	dev_remove_pack(&lowpan_packet_type);
 
+	unregister_netdevice_notifier(&lowpan_dev_notifier);
+
 	/* Now 6lowpan packet_type is removed, so no new fragments are
 	 * expected on RX, therefore that's the time to clean incomplete
 	 * fragments.
diff --git a/net/ieee802154/nl-mac.c b/net/ieee802154/nl-mac.c
index 1e99171..96bb08a 100644
--- a/net/ieee802154/nl-mac.c
+++ b/net/ieee802154/nl-mac.c
@@ -246,7 +246,7 @@ nla_put_failure:
 }
 EXPORT_SYMBOL(ieee802154_nl_start_confirm);
 
-static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 pid,
+static int ieee802154_nl_fill_iface(struct sk_buff *msg, u32 portid,
 	u32 seq, int flags, struct net_device *dev)
 {
 	void *hdr;
@@ -534,7 +534,7 @@ static int ieee802154_list_iface(struct sk_buff *skb,
 	if (!msg)
 		goto out_dev;
 
-	rc = ieee802154_nl_fill_iface(msg, info->snd_pid, info->snd_seq,
+	rc = ieee802154_nl_fill_iface(msg, info->snd_portid, info->snd_seq,
 			0, dev);
 	if (rc < 0)
 		goto out_free;
@@ -565,7 +565,7 @@ static int ieee802154_dump_iface(struct sk_buff *skb,
 		if (idx < s_idx || (dev->type != ARPHRD_IEEE802154))
 			goto cont;
 
-		if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).pid,
+		if (ieee802154_nl_fill_iface(skb, NETLINK_CB(cb->skb).portid,
 			cb->nlh->nlmsg_seq, NLM_F_MULTI, dev) < 0)
 			break;
 cont:
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index d54be34..22b1a70 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -35,7 +35,7 @@
 
 #include "ieee802154.h"
 
-static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 pid,
+static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
 	u32 seq, int flags, struct wpan_phy *phy)
 {
 	void *hdr;
@@ -105,7 +105,7 @@ static int ieee802154_list_phy(struct sk_buff *skb,
 	if (!msg)
 		goto out_dev;
 
-	rc = ieee802154_nl_fill_phy(msg, info->snd_pid, info->snd_seq,
+	rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq,
 			0, phy);
 	if (rc < 0)
 		goto out_free;
@@ -138,7 +138,7 @@ static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data)
 		return 0;
 
 	rc = ieee802154_nl_fill_phy(data->skb,
-			NETLINK_CB(data->cb->skb).pid,
+			NETLINK_CB(data->cb->skb).portid,
 			data->cb->nlh->nlmsg_seq,
 			NLM_F_MULTI,
 			phy);