Merge Linus master into drm-next

The merge is clean, but the arm build fails afterwards,
due to API changes in the regulator tree.

I've included the patch into the merge to fix the build.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 93 insertions, 22 deletions

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 70d3450588b2..78fc04ad36fc 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -16,7 +16,6 @@
 #include <linux/export.h>
 #include <linux/user_namespace.h>
 #include <linux/net_namespace.h>
-#include <linux/rtnetlink.h>
 #include <net/sock.h>
 #include <net/netlink.h>
 #include <net/net_namespace.h>
@@ -148,9 +147,11 @@ static void ops_free_list(const struct pernet_operations *ops,
 	}
 }
 
+static void rtnl_net_notifyid(struct net *net, struct net *peer, int cmd,
+			      int id);
 static int alloc_netid(struct net *net, struct net *peer, int reqid)
 {
-	int min = 0, max = 0;
+	int min = 0, max = 0, id;
 
 	ASSERT_RTNL();
 
@@ -159,7 +160,11 @@ static int alloc_netid(struct net *net, struct net *peer, int reqid)
 		max = reqid + 1;
 	}
 
-	return idr_alloc(&net->netns_ids, peer, min, max, GFP_KERNEL);
+	id = idr_alloc(&net->netns_ids, peer, min, max, GFP_KERNEL);
+	if (id >= 0)
+		rtnl_net_notifyid(net, peer, RTM_NEWNSID, id);
+
+	return id;
 }
 
 /* This function is used by idr_for_each(). If net is equal to peer, the
@@ -238,10 +243,6 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
 	net->user_ns = user_ns;
 	idr_init(&net->netns_ids);
 
-#ifdef NETNS_REFCNT_DEBUG
-	atomic_set(&net->use_count, 0);
-#endif
-
 	list_for_each_entry(ops, &pernet_list, list) {
 		error = ops_init(ops, net);
 		if (error < 0)
@@ -296,13 +297,6 @@ out_free:
 
 static void net_free(struct net *net)
 {
-#ifdef NETNS_REFCNT_DEBUG
-	if (unlikely(atomic_read(&net->use_count) != 0)) {
-		pr_emerg("network namespace not free! Usage: %d\n",
-			 atomic_read(&net->use_count));
-		return;
-	}
-#endif
 	kfree(rcu_access_pointer(net->gen));
 	kmem_cache_free(net_cachep, net);
 }
@@ -370,8 +364,10 @@ static void cleanup_net(struct work_struct *work)
 		for_each_net(tmp) {
 			int id = __peernet2id(tmp, net, false);
 
-			if (id >= 0)
+			if (id >= 0) {
+				rtnl_net_notifyid(tmp, net, RTM_DELNSID, id);
 				idr_remove(&tmp->netns_ids, id);
+			}
 		}
 		idr_destroy(&net->netns_ids);
 
@@ -542,7 +538,8 @@ static int rtnl_net_get_size(void)
 }
 
 static int rtnl_net_fill(struct sk_buff *skb, u32 portid, u32 seq, int flags,
-			 int cmd, struct net *net, struct net *peer)
+			 int cmd, struct net *net, struct net *peer,
+			 int nsid)
 {
 	struct nlmsghdr *nlh;
 	struct rtgenmsg *rth;
@@ -557,9 +554,13 @@ static int rtnl_net_fill(struct sk_buff *skb, u32 portid, u32 seq, int flags,
 	rth = nlmsg_data(nlh);
 	rth->rtgen_family = AF_UNSPEC;
 
-	id = __peernet2id(net, peer, false);
-	if  (id < 0)
-		id = NETNSA_NSID_NOT_ASSIGNED;
+	if (nsid >= 0) {
+		id = nsid;
+	} else {
+		id = __peernet2id(net, peer, false);
+		if  (id < 0)
+			id = NETNSA_NSID_NOT_ASSIGNED;
+	}
 	if (nla_put_s32(skb, NETNSA_NSID, id))
 		goto nla_put_failure;
 
@@ -576,8 +577,8 @@ static int rtnl_net_getid(struct sk_buff *skb, struct nlmsghdr *nlh)
 	struct net *net = sock_net(skb->sk);
 	struct nlattr *tb[NETNSA_MAX + 1];
 	struct sk_buff *msg;
-	int err = -ENOBUFS;
 	struct net *peer;
+	int err;
 
 	err = nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, NETNSA_MAX,
 			  rtnl_net_policy);
@@ -600,7 +601,7 @@ static int rtnl_net_getid(struct sk_buff *skb, struct nlmsghdr *nlh)
 	}
 
 	err = rtnl_net_fill(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
-			    RTM_GETNSID, net, peer);
+			    RTM_GETNSID, net, peer, -1);
 	if (err < 0)
 		goto err_out;
 
@@ -614,6 +615,75 @@ out:
 	return err;
 }
 
+struct rtnl_net_dump_cb {
+	struct net *net;
+	struct sk_buff *skb;
+	struct netlink_callback *cb;
+	int idx;
+	int s_idx;
+};
+
+static int rtnl_net_dumpid_one(int id, void *peer, void *data)
+{
+	struct rtnl_net_dump_cb *net_cb = (struct rtnl_net_dump_cb *)data;
+	int ret;
+
+	if (net_cb->idx < net_cb->s_idx)
+		goto cont;
+
+	ret = rtnl_net_fill(net_cb->skb, NETLINK_CB(net_cb->cb->skb).portid,
+			    net_cb->cb->nlh->nlmsg_seq, NLM_F_MULTI,
+			    RTM_NEWNSID, net_cb->net, peer, id);
+	if (ret < 0)
+		return ret;
+
+cont:
+	net_cb->idx++;
+	return 0;
+}
+
+static int rtnl_net_dumpid(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct net *net = sock_net(skb->sk);
+	struct rtnl_net_dump_cb net_cb = {
+		.net = net,
+		.skb = skb,
+		.cb = cb,
+		.idx = 0,
+		.s_idx = cb->args[0],
+	};
+
+	ASSERT_RTNL();
+
+	idr_for_each(&net->netns_ids, rtnl_net_dumpid_one, &net_cb);
+
+	cb->args[0] = net_cb.idx;
+	return skb->len;
+}
+
+static void rtnl_net_notifyid(struct net *net, struct net *peer, int cmd,
+			      int id)
+{
+	struct sk_buff *msg;
+	int err = -ENOMEM;
+
+	msg = nlmsg_new(rtnl_net_get_size(), GFP_KERNEL);
+	if (!msg)
+		goto out;
+
+	err = rtnl_net_fill(msg, 0, 0, 0, cmd, net, peer, id);
+	if (err < 0)
+		goto err_out;
+
+	rtnl_notify(msg, net, 0, RTNLGRP_NSID, NULL, 0);
+	return;
+
+err_out:
+	nlmsg_free(msg);
+out:
+	rtnl_set_sk_err(net, RTNLGRP_NSID, err);
+}
+
 static int __init net_ns_init(void)
 {
 	struct net_generic *ng;
@@ -648,7 +718,8 @@ static int __init net_ns_init(void)
 	register_pernet_subsys(&net_ns_ops);
 
 	rtnl_register(PF_UNSPEC, RTM_NEWNSID, rtnl_net_newid, NULL, NULL);
-	rtnl_register(PF_UNSPEC, RTM_GETNSID, rtnl_net_getid, NULL, NULL);
+	rtnl_register(PF_UNSPEC, RTM_GETNSID, rtnl_net_getid, rtnl_net_dumpid,
+		      NULL);
 
 	return 0;
 }