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>

2 files changed, 131 insertions, 133 deletions

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 5463969..0f2e3ad 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -67,8 +67,8 @@
 struct netlink_sock {
 	/* struct sock has to be the first member of netlink_sock */
 	struct sock		sk;
-	u32			pid;
-	u32			dst_pid;
+	u32			portid;
+	u32			dst_portid;
 	u32			dst_group;
 	u32			flags;
 	u32			subscriptions;
@@ -104,7 +104,7 @@ static inline int netlink_is_kernel(struct sock *sk)
 	return nlk_sk(sk)->flags & NETLINK_KERNEL_SOCKET;
 }
 
-struct nl_pid_hash {
+struct nl_portid_hash {
 	struct hlist_head	*table;
 	unsigned long		rehash_time;
 
@@ -118,10 +118,10 @@ struct nl_pid_hash {
 };
 
 struct netlink_table {
-	struct nl_pid_hash	hash;
+	struct nl_portid_hash	hash;
 	struct hlist_head	mc_list;
 	struct listeners __rcu	*listeners;
-	unsigned int		nl_nonroot;
+	unsigned int		flags;
 	unsigned int		groups;
 	struct mutex		*cb_mutex;
 	struct module		*module;
@@ -145,9 +145,9 @@ static inline u32 netlink_group_mask(u32 group)
 	return group ? 1 << (group - 1) : 0;
 }
 
-static inline struct hlist_head *nl_pid_hashfn(struct nl_pid_hash *hash, u32 pid)
+static inline struct hlist_head *nl_portid_hashfn(struct nl_portid_hash *hash, u32 portid)
 {
-	return &hash->table[jhash_1word(pid, hash->rnd) & hash->mask];
+	return &hash->table[jhash_1word(portid, hash->rnd) & hash->mask];
 }
 
 static void netlink_destroy_callback(struct netlink_callback *cb)
@@ -239,17 +239,17 @@ netlink_unlock_table(void)
 		wake_up(&nl_table_wait);
 }
 
-static struct sock *netlink_lookup(struct net *net, int protocol, u32 pid)
+static struct sock *netlink_lookup(struct net *net, int protocol, u32 portid)
 {
-	struct nl_pid_hash *hash = &nl_table[protocol].hash;
+	struct nl_portid_hash *hash = &nl_table[protocol].hash;
 	struct hlist_head *head;
 	struct sock *sk;
 	struct hlist_node *node;
 
 	read_lock(&nl_table_lock);
-	head = nl_pid_hashfn(hash, pid);
+	head = nl_portid_hashfn(hash, portid);
 	sk_for_each(sk, node, head) {
-		if (net_eq(sock_net(sk), net) && (nlk_sk(sk)->pid == pid)) {
+		if (net_eq(sock_net(sk), net) && (nlk_sk(sk)->portid == portid)) {
 			sock_hold(sk);
 			goto found;
 		}
@@ -260,7 +260,7 @@ found:
 	return sk;
 }
 
-static struct hlist_head *nl_pid_hash_zalloc(size_t size)
+static struct hlist_head *nl_portid_hash_zalloc(size_t size)
 {
 	if (size <= PAGE_SIZE)
 		return kzalloc(size, GFP_ATOMIC);
@@ -270,7 +270,7 @@ static struct hlist_head *nl_pid_hash_zalloc(size_t size)
 					 get_order(size));
 }
 
-static void nl_pid_hash_free(struct hlist_head *table, size_t size)
+static void nl_portid_hash_free(struct hlist_head *table, size_t size)
 {
 	if (size <= PAGE_SIZE)
 		kfree(table);
@@ -278,7 +278,7 @@ static void nl_pid_hash_free(struct hlist_head *table, size_t size)
 		free_pages((unsigned long)table, get_order(size));
 }
 
-static int nl_pid_hash_rehash(struct nl_pid_hash *hash, int grow)
+static int nl_portid_hash_rehash(struct nl_portid_hash *hash, int grow)
 {
 	unsigned int omask, mask, shift;
 	size_t osize, size;
@@ -296,7 +296,7 @@ static int nl_pid_hash_rehash(struct nl_pid_hash *hash, int grow)
 		size *= 2;
 	}
 
-	table = nl_pid_hash_zalloc(size);
+	table = nl_portid_hash_zalloc(size);
 	if (!table)
 		return 0;
 
@@ -311,23 +311,23 @@ static int nl_pid_hash_rehash(struct nl_pid_hash *hash, int grow)
 		struct hlist_node *node, *tmp;
 
 		sk_for_each_safe(sk, node, tmp, &otable[i])
-			__sk_add_node(sk, nl_pid_hashfn(hash, nlk_sk(sk)->pid));
+			__sk_add_node(sk, nl_portid_hashfn(hash, nlk_sk(sk)->portid));
 	}
 
-	nl_pid_hash_free(otable, osize);
+	nl_portid_hash_free(otable, osize);
 	hash->rehash_time = jiffies + 10 * 60 * HZ;
 	return 1;
 }
 
-static inline int nl_pid_hash_dilute(struct nl_pid_hash *hash, int len)
+static inline int nl_portid_hash_dilute(struct nl_portid_hash *hash, int len)
 {
 	int avg = hash->entries >> hash->shift;
 
-	if (unlikely(avg > 1) && nl_pid_hash_rehash(hash, 1))
+	if (unlikely(avg > 1) && nl_portid_hash_rehash(hash, 1))
 		return 1;
 
 	if (unlikely(len > avg) && time_after(jiffies, hash->rehash_time)) {
-		nl_pid_hash_rehash(hash, 0);
+		nl_portid_hash_rehash(hash, 0);
 		return 1;
 	}
 
@@ -356,9 +356,9 @@ netlink_update_listeners(struct sock *sk)
 	 * makes sure updates are visible before bind or setsockopt return. */
 }
 
-static int netlink_insert(struct sock *sk, struct net *net, u32 pid)
+static int netlink_insert(struct sock *sk, struct net *net, u32 portid)
 {
-	struct nl_pid_hash *hash = &nl_table[sk->sk_protocol].hash;
+	struct nl_portid_hash *hash = &nl_table[sk->sk_protocol].hash;
 	struct hlist_head *head;
 	int err = -EADDRINUSE;
 	struct sock *osk;
@@ -366,10 +366,10 @@ static int netlink_insert(struct sock *sk, struct net *net, u32 pid)
 	int len;
 
 	netlink_table_grab();
-	head = nl_pid_hashfn(hash, pid);
+	head = nl_portid_hashfn(hash, portid);
 	len = 0;
 	sk_for_each(osk, node, head) {
-		if (net_eq(sock_net(osk), net) && (nlk_sk(osk)->pid == pid))
+		if (net_eq(sock_net(osk), net) && (nlk_sk(osk)->portid == portid))
 			break;
 		len++;
 	}
@@ -377,17 +377,17 @@ static int netlink_insert(struct sock *sk, struct net *net, u32 pid)
 		goto err;
 
 	err = -EBUSY;
-	if (nlk_sk(sk)->pid)
+	if (nlk_sk(sk)->portid)
 		goto err;
 
 	err = -ENOMEM;
 	if (BITS_PER_LONG > 32 && unlikely(hash->entries >= UINT_MAX))
 		goto err;
 
-	if (len && nl_pid_hash_dilute(hash, len))
-		head = nl_pid_hashfn(hash, pid);
+	if (len && nl_portid_hash_dilute(hash, len))
+		head = nl_portid_hashfn(hash, portid);
 	hash->entries++;
-	nlk_sk(sk)->pid = pid;
+	nlk_sk(sk)->portid = portid;
 	sk_add_node(sk, head);
 	err = 0;
 
@@ -518,11 +518,11 @@ static int netlink_release(struct socket *sock)
 
 	skb_queue_purge(&sk->sk_write_queue);
 
-	if (nlk->pid) {
+	if (nlk->portid) {
 		struct netlink_notify n = {
 						.net = sock_net(sk),
 						.protocol = sk->sk_protocol,
-						.pid = nlk->pid,
+						.portid = nlk->portid,
 					  };
 		atomic_notifier_call_chain(&netlink_chain,
 				NETLINK_URELEASE, &n);
@@ -536,6 +536,8 @@ static int netlink_release(struct socket *sock)
 		if (--nl_table[sk->sk_protocol].registered == 0) {
 			kfree(nl_table[sk->sk_protocol].listeners);
 			nl_table[sk->sk_protocol].module = NULL;
+			nl_table[sk->sk_protocol].bind = NULL;
+			nl_table[sk->sk_protocol].flags = 0;
 			nl_table[sk->sk_protocol].registered = 0;
 		}
 	} else if (nlk->subscriptions) {
@@ -557,24 +559,24 @@ static int netlink_autobind(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
 	struct net *net = sock_net(sk);
-	struct nl_pid_hash *hash = &nl_table[sk->sk_protocol].hash;
+	struct nl_portid_hash *hash = &nl_table[sk->sk_protocol].hash;
 	struct hlist_head *head;
 	struct sock *osk;
 	struct hlist_node *node;
-	s32 pid = task_tgid_vnr(current);
+	s32 portid = task_tgid_vnr(current);
 	int err;
 	static s32 rover = -4097;
 
 retry:
 	cond_resched();
 	netlink_table_grab();
-	head = nl_pid_hashfn(hash, pid);
+	head = nl_portid_hashfn(hash, portid);
 	sk_for_each(osk, node, head) {
 		if (!net_eq(sock_net(osk), net))
 			continue;
-		if (nlk_sk(osk)->pid == pid) {
-			/* Bind collision, search negative pid values. */
-			pid = rover--;
+		if (nlk_sk(osk)->portid == portid) {
+			/* Bind collision, search negative portid values. */
+			portid = rover--;
 			if (rover > -4097)
 				rover = -4097;
 			netlink_table_ungrab();
@@ -583,7 +585,7 @@ retry:
 	}
 	netlink_table_ungrab();
 
-	err = netlink_insert(sk, net, pid);
+	err = netlink_insert(sk, net, portid);
 	if (err == -EADDRINUSE)
 		goto retry;
 
@@ -596,7 +598,7 @@ retry:
 
 static inline int netlink_capable(const struct socket *sock, unsigned int flag)
 {
-	return (nl_table[sock->sk->sk_protocol].nl_nonroot & flag) ||
+	return (nl_table[sock->sk->sk_protocol].flags & flag) ||
 	       capable(CAP_NET_ADMIN);
 }
 
@@ -659,15 +661,15 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr,
 
 	/* Only superuser is allowed to listen multicasts */
 	if (nladdr->nl_groups) {
-		if (!netlink_capable(sock, NL_NONROOT_RECV))
+		if (!netlink_capable(sock, NL_CFG_F_NONROOT_RECV))
 			return -EPERM;
 		err = netlink_realloc_groups(sk);
 		if (err)
 			return err;
 	}
 
-	if (nlk->pid) {
-		if (nladdr->nl_pid != nlk->pid)
+	if (nlk->portid) {
+		if (nladdr->nl_pid != nlk->portid)
 			return -EINVAL;
 	} else {
 		err = nladdr->nl_pid ?
@@ -713,7 +715,7 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
 
 	if (addr->sa_family == AF_UNSPEC) {
 		sk->sk_state	= NETLINK_UNCONNECTED;
-		nlk->dst_pid	= 0;
+		nlk->dst_portid	= 0;
 		nlk->dst_group  = 0;
 		return 0;
 	}
@@ -721,15 +723,15 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
 		return -EINVAL;
 
 	/* Only superuser is allowed to send multicasts */
-	if (nladdr->nl_groups && !netlink_capable(sock, NL_NONROOT_SEND))
+	if (nladdr->nl_groups && !netlink_capable(sock, NL_CFG_F_NONROOT_SEND))
 		return -EPERM;
 
-	if (!nlk->pid)
+	if (!nlk->portid)
 		err = netlink_autobind(sock);
 
 	if (err == 0) {
 		sk->sk_state	= NETLINK_CONNECTED;
-		nlk->dst_pid 	= nladdr->nl_pid;
+		nlk->dst_portid = nladdr->nl_pid;
 		nlk->dst_group  = ffs(nladdr->nl_groups);
 	}
 
@@ -748,10 +750,10 @@ static int netlink_getname(struct socket *sock, struct sockaddr *addr,
 	*addr_len = sizeof(*nladdr);
 
 	if (peer) {
-		nladdr->nl_pid = nlk->dst_pid;
+		nladdr->nl_pid = nlk->dst_portid;
 		nladdr->nl_groups = netlink_group_mask(nlk->dst_group);
 	} else {
-		nladdr->nl_pid = nlk->pid;
+		nladdr->nl_pid = nlk->portid;
 		nladdr->nl_groups = nlk->groups ? nlk->groups[0] : 0;
 	}
 	return 0;
@@ -770,19 +772,19 @@ static void netlink_overrun(struct sock *sk)
 	atomic_inc(&sk->sk_drops);
 }
 
-static struct sock *netlink_getsockbypid(struct sock *ssk, u32 pid)
+static struct sock *netlink_getsockbyportid(struct sock *ssk, u32 portid)
 {
 	struct sock *sock;
 	struct netlink_sock *nlk;
 
-	sock = netlink_lookup(sock_net(ssk), ssk->sk_protocol, pid);
+	sock = netlink_lookup(sock_net(ssk), ssk->sk_protocol, portid);
 	if (!sock)
 		return ERR_PTR(-ECONNREFUSED);
 
 	/* Don't bother queuing skb if kernel socket has no input function */
 	nlk = nlk_sk(sock);
 	if (sock->sk_state == NETLINK_CONNECTED &&
-	    nlk->dst_pid != nlk_sk(ssk)->pid) {
+	    nlk->dst_portid != nlk_sk(ssk)->portid) {
 		sock_put(sock);
 		return ERR_PTR(-ECONNREFUSED);
 	}
@@ -912,7 +914,8 @@ static void netlink_rcv_wake(struct sock *sk)
 		wake_up_interruptible(&nlk->wait);
 }
 
-static int netlink_unicast_kernel(struct sock *sk, struct sk_buff *skb)
+static int netlink_unicast_kernel(struct sock *sk, struct sk_buff *skb,
+				  struct sock *ssk)
 {
 	int ret;
 	struct netlink_sock *nlk = nlk_sk(sk);
@@ -921,6 +924,7 @@ static int netlink_unicast_kernel(struct sock *sk, struct sk_buff *skb)
 	if (nlk->netlink_rcv != NULL) {
 		ret = skb->len;
 		skb_set_owner_r(skb, sk);
+		NETLINK_CB(skb).ssk = ssk;
 		nlk->netlink_rcv(skb);
 		consume_skb(skb);
 	} else {
@@ -931,7 +935,7 @@ static int netlink_unicast_kernel(struct sock *sk, struct sk_buff *skb)
 }
 
 int netlink_unicast(struct sock *ssk, struct sk_buff *skb,
-		    u32 pid, int nonblock)
+		    u32 portid, int nonblock)
 {
 	struct sock *sk;
 	int err;
@@ -941,13 +945,13 @@ int netlink_unicast(struct sock *ssk, struct sk_buff *skb,
 
 	timeo = sock_sndtimeo(ssk, nonblock);
 retry:
-	sk = netlink_getsockbypid(ssk, pid);
+	sk = netlink_getsockbyportid(ssk, portid);
 	if (IS_ERR(sk)) {
 		kfree_skb(skb);
 		return PTR_ERR(sk);
 	}
 	if (netlink_is_kernel(sk))
-		return netlink_unicast_kernel(sk, skb);
+		return netlink_unicast_kernel(sk, skb, ssk);
 
 	if (sk_filter(sk, skb)) {
 		err = skb->len;
@@ -1001,7 +1005,7 @@ static int netlink_broadcast_deliver(struct sock *sk, struct sk_buff *skb)
 struct netlink_broadcast_data {
 	struct sock *exclude_sk;
 	struct net *net;
-	u32 pid;
+	u32 portid;
 	u32 group;
 	int failure;
 	int delivery_failure;
@@ -1022,7 +1026,7 @@ static int do_one_broadcast(struct sock *sk,
 	if (p->exclude_sk == sk)
 		goto out;
 
-	if (nlk->pid == p->pid || p->group - 1 >= nlk->ngroups ||
+	if (nlk->portid == p->portid || p->group - 1 >= nlk->ngroups ||
 	    !test_bit(p->group - 1, nlk->groups))
 		goto out;
 
@@ -1074,7 +1078,7 @@ out:
 	return 0;
 }
 
-int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 pid,
+int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 portid,
 	u32 group, gfp_t allocation,
 	int (*filter)(struct sock *dsk, struct sk_buff *skb, void *data),
 	void *filter_data)
@@ -1088,7 +1092,7 @@ int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 pid,
 
 	info.exclude_sk = ssk;
 	info.net = net;
-	info.pid = pid;
+	info.portid = portid;
 	info.group = group;
 	info.failure = 0;
 	info.delivery_failure = 0;
@@ -1126,17 +1130,17 @@ int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb, u32 pid,
 }
 EXPORT_SYMBOL(netlink_broadcast_filtered);
 
-int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid,
+int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 portid,
 		      u32 group, gfp_t allocation)
 {
-	return netlink_broadcast_filtered(ssk, skb, pid, group, allocation,
+	return netlink_broadcast_filtered(ssk, skb, portid, group, allocation,
 		NULL, NULL);
 }
 EXPORT_SYMBOL(netlink_broadcast);
 
 struct netlink_set_err_data {
 	struct sock *exclude_sk;
-	u32 pid;
+	u32 portid;
 	u32 group;
 	int code;
 };
@@ -1152,7 +1156,7 @@ static int do_one_set_err(struct sock *sk, struct netlink_set_err_data *p)
 	if (!net_eq(sock_net(sk), sock_net(p->exclude_sk)))
 		goto out;
 
-	if (nlk->pid == p->pid || p->group - 1 >= nlk->ngroups ||
+	if (nlk->portid == p->portid || p->group - 1 >= nlk->ngroups ||
 	    !test_bit(p->group - 1, nlk->groups))
 		goto out;
 
@@ -1170,14 +1174,14 @@ out:
 /**
  * netlink_set_err - report error to broadcast listeners
  * @ssk: the kernel netlink socket, as returned by netlink_kernel_create()
- * @pid: the PID of a process that we want to skip (if any)
+ * @portid: the PORTID of a process that we want to skip (if any)
  * @groups: the broadcast group that will notice the error
  * @code: error code, must be negative (as usual in kernelspace)
  *
  * This function returns the number of broadcast listeners that have set the
  * NETLINK_RECV_NO_ENOBUFS socket option.
  */
-int netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
+int netlink_set_err(struct sock *ssk, u32 portid, u32 group, int code)
 {
 	struct netlink_set_err_data info;
 	struct hlist_node *node;
@@ -1185,7 +1189,7 @@ int netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
 	int ret = 0;
 
 	info.exclude_sk = ssk;
-	info.pid = pid;
+	info.portid = portid;
 	info.group = group;
 	/* sk->sk_err wants a positive error value */
 	info.code = -code;
@@ -1242,7 +1246,7 @@ static int netlink_setsockopt(struct socket *sock, int level, int optname,
 		break;
 	case NETLINK_ADD_MEMBERSHIP:
 	case NETLINK_DROP_MEMBERSHIP: {
-		if (!netlink_capable(sock, NL_NONROOT_RECV))
+		if (!netlink_capable(sock, NL_CFG_F_NONROOT_RECV))
 			return -EPERM;
 		err = netlink_realloc_groups(sk);
 		if (err)
@@ -1350,7 +1354,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	struct sock *sk = sock->sk;
 	struct netlink_sock *nlk = nlk_sk(sk);
 	struct sockaddr_nl *addr = msg->msg_name;
-	u32 dst_pid;
+	u32 dst_portid;
 	u32 dst_group;
 	struct sk_buff *skb;
 	int err;
@@ -1362,7 +1366,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	if (NULL == siocb->scm)
 		siocb->scm = &scm;
 
-	err = scm_send(sock, msg, siocb->scm);
+	err = scm_send(sock, msg, siocb->scm, true);
 	if (err < 0)
 		return err;
 
@@ -1370,17 +1374,18 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 		err = -EINVAL;
 		if (addr->nl_family != AF_NETLINK)
 			goto out;
-		dst_pid = addr->nl_pid;
+		dst_portid = addr->nl_pid;
 		dst_group = ffs(addr->nl_groups);
 		err =  -EPERM;
-		if (dst_group && !netlink_capable(sock, NL_NONROOT_SEND))
+		if ((dst_group || dst_portid) &&
+		    !netlink_capable(sock, NL_CFG_F_NONROOT_SEND))
 			goto out;
 	} else {
-		dst_pid = nlk->dst_pid;
+		dst_portid = nlk->dst_portid;
 		dst_group = nlk->dst_group;
 	}
 
-	if (!nlk->pid) {
+	if (!nlk->portid) {
 		err = netlink_autobind(sock);
 		if (err)
 			goto out;
@@ -1394,9 +1399,9 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	if (skb == NULL)
 		goto out;
 
-	NETLINK_CB(skb).pid	= nlk->pid;
+	NETLINK_CB(skb).portid	= nlk->portid;
 	NETLINK_CB(skb).dst_group = dst_group;
-	memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
+	NETLINK_CB(skb).creds	= siocb->scm->creds;
 
 	err = -EFAULT;
 	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
@@ -1412,9 +1417,9 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 
 	if (dst_group) {
 		atomic_inc(&skb->users);
-		netlink_broadcast(sk, skb, dst_pid, dst_group, GFP_KERNEL);
+		netlink_broadcast(sk, skb, dst_portid, dst_group, GFP_KERNEL);
 	}
-	err = netlink_unicast(sk, skb, dst_pid, msg->msg_flags&MSG_DONTWAIT);
+	err = netlink_unicast(sk, skb, dst_portid, msg->msg_flags&MSG_DONTWAIT);
 
 out:
 	scm_destroy(siocb->scm);
@@ -1477,7 +1482,7 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
 		struct sockaddr_nl *addr = (struct sockaddr_nl *)msg->msg_name;
 		addr->nl_family = AF_NETLINK;
 		addr->nl_pad    = 0;
-		addr->nl_pid	= NETLINK_CB(skb).pid;
+		addr->nl_pid	= NETLINK_CB(skb).portid;
 		addr->nl_groups	= netlink_group_mask(NETLINK_CB(skb).dst_group);
 		msg->msg_namelen = sizeof(*addr);
 	}
@@ -1521,9 +1526,8 @@ static void netlink_data_ready(struct sock *sk, int len)
  */
 
 struct sock *
-netlink_kernel_create(struct net *net, int unit,
-		      struct module *module,
-		      struct netlink_kernel_cfg *cfg)
+__netlink_kernel_create(struct net *net, int unit, struct module *module,
+			struct netlink_kernel_cfg *cfg)
 {
 	struct socket *sock;
 	struct sock *sk;
@@ -1577,7 +1581,10 @@ netlink_kernel_create(struct net *net, int unit,
 		rcu_assign_pointer(nl_table[unit].listeners, listeners);
 		nl_table[unit].cb_mutex = cb_mutex;
 		nl_table[unit].module = module;
-		nl_table[unit].bind = cfg ? cfg->bind : NULL;
+		if (cfg) {
+			nl_table[unit].bind = cfg->bind;
+			nl_table[unit].flags = cfg->flags;
+		}
 		nl_table[unit].registered = 1;
 	} else {
 		kfree(listeners);
@@ -1595,8 +1602,7 @@ out_sock_release_nosk:
 	sock_release(sock);
 	return NULL;
 }
-EXPORT_SYMBOL(netlink_kernel_create);
-
+EXPORT_SYMBOL(__netlink_kernel_create);
 
 void
 netlink_kernel_release(struct sock *sk)
@@ -1676,15 +1682,8 @@ void netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
 	netlink_table_ungrab();
 }
 
-void netlink_set_nonroot(int protocol, unsigned int flags)
-{
-	if ((unsigned int)protocol < MAX_LINKS)
-		nl_table[protocol].nl_nonroot = flags;
-}
-EXPORT_SYMBOL(netlink_set_nonroot);
-
 struct nlmsghdr *
-__nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
+__nlmsg_put(struct sk_buff *skb, u32 portid, u32 seq, int type, int len, int flags)
 {
 	struct nlmsghdr *nlh;
 	int size = NLMSG_LENGTH(len);
@@ -1693,7 +1692,7 @@ __nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len, int flags)
 	nlh->nlmsg_type = type;
 	nlh->nlmsg_len = size;
 	nlh->nlmsg_flags = flags;
-	nlh->nlmsg_pid = pid;
+	nlh->nlmsg_pid = portid;
 	nlh->nlmsg_seq = seq;
 	if (!__builtin_constant_p(size) || NLMSG_ALIGN(size) - size != 0)
 		memset(NLMSG_DATA(nlh) + len, 0, NLMSG_ALIGN(size) - size);
@@ -1789,7 +1788,7 @@ int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
 	atomic_inc(&skb->users);
 	cb->skb = skb;
 
-	sk = netlink_lookup(sock_net(ssk), ssk->sk_protocol, NETLINK_CB(skb).pid);
+	sk = netlink_lookup(sock_net(ssk), ssk->sk_protocol, NETLINK_CB(skb).portid);
 	if (sk == NULL) {
 		netlink_destroy_callback(cb);
 		return -ECONNREFUSED;
@@ -1837,7 +1836,7 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
 
 		sk = netlink_lookup(sock_net(in_skb->sk),
 				    in_skb->sk->sk_protocol,
-				    NETLINK_CB(in_skb).pid);
+				    NETLINK_CB(in_skb).portid);
 		if (sk) {
 			sk->sk_err = ENOBUFS;
 			sk->sk_error_report(sk);
@@ -1846,12 +1845,12 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
 		return;
 	}
 
-	rep = __nlmsg_put(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
+	rep = __nlmsg_put(skb, NETLINK_CB(in_skb).portid, nlh->nlmsg_seq,
 			  NLMSG_ERROR, payload, 0);
 	errmsg = nlmsg_data(rep);
 	errmsg->error = err;
 	memcpy(&errmsg->msg, nlh, err ? nlh->nlmsg_len : sizeof(*nlh));
-	netlink_unicast(in_skb->sk, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
+	netlink_unicast(in_skb->sk, skb, NETLINK_CB(in_skb).portid, MSG_DONTWAIT);
 }
 EXPORT_SYMBOL(netlink_ack);
 
@@ -1901,33 +1900,33 @@ EXPORT_SYMBOL(netlink_rcv_skb);
  * nlmsg_notify - send a notification netlink message
  * @sk: netlink socket to use
  * @skb: notification message
- * @pid: destination netlink pid for reports or 0
+ * @portid: destination netlink portid for reports or 0
  * @group: destination multicast group or 0
  * @report: 1 to report back, 0 to disable
  * @flags: allocation flags
  */
-int nlmsg_notify(struct sock *sk, struct sk_buff *skb, u32 pid,
+int nlmsg_notify(struct sock *sk, struct sk_buff *skb, u32 portid,
 		 unsigned int group, int report, gfp_t flags)
 {
 	int err = 0;
 
 	if (group) {
-		int exclude_pid = 0;
+		int exclude_portid = 0;
 
 		if (report) {
 			atomic_inc(&skb->users);
-			exclude_pid = pid;
+			exclude_portid = portid;
 		}
 
 		/* errors reported via destination sk->sk_err, but propagate
 		 * delivery errors if NETLINK_BROADCAST_ERROR flag is set */
-		err = nlmsg_multicast(sk, skb, exclude_pid, group, flags);
+		err = nlmsg_multicast(sk, skb, exclude_portid, group, flags);
 	}
 
 	if (report) {
 		int err2;
 
-		err2 = nlmsg_unicast(sk, skb, pid);
+		err2 = nlmsg_unicast(sk, skb, portid);
 		if (!err || err == -ESRCH)
 			err = err2;
 	}
@@ -1952,7 +1951,7 @@ static struct sock *netlink_seq_socket_idx(struct seq_file *seq, loff_t pos)
 	loff_t off = 0;
 
 	for (i = 0; i < MAX_LINKS; i++) {
-		struct nl_pid_hash *hash = &nl_table[i].hash;
+		struct nl_portid_hash *hash = &nl_table[i].hash;
 
 		for (j = 0; j <= hash->mask; j++) {
 			sk_for_each(s, node, &hash->table[j]) {
@@ -2000,7 +1999,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 	j = iter->hash_idx + 1;
 
 	do {
-		struct nl_pid_hash *hash = &nl_table[i].hash;
+		struct nl_portid_hash *hash = &nl_table[i].hash;
 
 		for (; j <= hash->mask; j++) {
 			s = sk_head(&hash->table[j]);
@@ -2039,7 +2038,7 @@ static int netlink_seq_show(struct seq_file *seq, void *v)
 		seq_printf(seq, "%pK %-3d %-6d %08x %-8d %-8d %pK %-8d %-8d %-8lu\n",
 			   s,
 			   s->sk_protocol,
-			   nlk->pid,
+			   nlk->portid,
 			   nlk->groups ? (u32)nlk->groups[0] : 0,
 			   sk_rmem_alloc_get(s),
 			   sk_wmem_alloc_get(s),
@@ -2147,6 +2146,7 @@ static void __init netlink_add_usersock_entry(void)
 	rcu_assign_pointer(nl_table[NETLINK_USERSOCK].listeners, listeners);
 	nl_table[NETLINK_USERSOCK].module = THIS_MODULE;
 	nl_table[NETLINK_USERSOCK].registered = 1;
+	nl_table[NETLINK_USERSOCK].flags = NL_CFG_F_NONROOT_SEND;
 
 	netlink_table_ungrab();
 }
@@ -2183,12 +2183,12 @@ static int __init netlink_proto_init(void)
 	order = get_bitmask_order(min(limit, (unsigned long)UINT_MAX)) - 1;
 
 	for (i = 0; i < MAX_LINKS; i++) {
-		struct nl_pid_hash *hash = &nl_table[i].hash;
+		struct nl_portid_hash *hash = &nl_table[i].hash;
 
-		hash->table = nl_pid_hash_zalloc(1 * sizeof(*hash->table));
+		hash->table = nl_portid_hash_zalloc(1 * sizeof(*hash->table));
 		if (!hash->table) {
 			while (i-- > 0)
-				nl_pid_hash_free(nl_table[i].hash.table,
+				nl_portid_hash_free(nl_table[i].hash.table,
 						 1 * sizeof(*hash->table));
 			kfree(nl_table);
 			goto panic;
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index fda4974..f2aabb6 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -501,7 +501,7 @@ EXPORT_SYMBOL(genl_unregister_family);
 /**
  * genlmsg_put - Add generic netlink header to netlink message
  * @skb: socket buffer holding the message
- * @pid: netlink pid the message is addressed to
+ * @portid: netlink portid the message is addressed to
  * @seq: sequence number (usually the one of the sender)
  * @family: generic netlink family
  * @flags: netlink message flags
@@ -509,13 +509,13 @@ EXPORT_SYMBOL(genl_unregister_family);
  *
  * Returns pointer to user specific header
  */
-void *genlmsg_put(struct sk_buff *skb, u32 pid, u32 seq,
+void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
 				struct genl_family *family, int flags, u8 cmd)
 {
 	struct nlmsghdr *nlh;
 	struct genlmsghdr *hdr;
 
-	nlh = nlmsg_put(skb, pid, seq, family->id, GENL_HDRLEN +
+	nlh = nlmsg_put(skb, portid, seq, family->id, GENL_HDRLEN +
 			family->hdrsize, flags);
 	if (nlh == NULL)
 		return NULL;
@@ -585,7 +585,7 @@ static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	}
 
 	info.snd_seq = nlh->nlmsg_seq;
-	info.snd_pid = NETLINK_CB(skb).pid;
+	info.snd_portid = NETLINK_CB(skb).portid;
 	info.nlhdr = nlh;
 	info.genlhdr = nlmsg_data(nlh);
 	info.userhdr = nlmsg_data(nlh) + GENL_HDRLEN;
@@ -626,12 +626,12 @@ static struct genl_family genl_ctrl = {
 	.netnsok = true,
 };
 
-static int ctrl_fill_info(struct genl_family *family, u32 pid, u32 seq,
+static int ctrl_fill_info(struct genl_family *family, u32 portid, u32 seq,
 			  u32 flags, struct sk_buff *skb, u8 cmd)
 {
 	void *hdr;
 
-	hdr = genlmsg_put(skb, pid, seq, &genl_ctrl, flags, cmd);
+	hdr = genlmsg_put(skb, portid, seq, &genl_ctrl, flags, cmd);
 	if (hdr == NULL)
 		return -1;
 
@@ -701,7 +701,7 @@ nla_put_failure:
 	return -EMSGSIZE;
 }
 
-static int ctrl_fill_mcgrp_info(struct genl_multicast_group *grp, u32 pid,
+static int ctrl_fill_mcgrp_info(struct genl_multicast_group *grp, u32 portid,
 				u32 seq, u32 flags, struct sk_buff *skb,
 				u8 cmd)
 {
@@ -709,7 +709,7 @@ static int ctrl_fill_mcgrp_info(struct genl_multicast_group *grp, u32 pid,
 	struct nlattr *nla_grps;
 	struct nlattr *nest;
 
-	hdr = genlmsg_put(skb, pid, seq, &genl_ctrl, flags, cmd);
+	hdr = genlmsg_put(skb, portid, seq, &genl_ctrl, flags, cmd);
 	if (hdr == NULL)
 		return -1;
 
@@ -756,7 +756,7 @@ static int ctrl_dumpfamily(struct sk_buff *skb, struct netlink_callback *cb)
 				continue;
 			if (++n < fams_to_skip)
 				continue;
-			if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).pid,
+			if (ctrl_fill_info(rt, NETLINK_CB(cb->skb).portid,
 					   cb->nlh->nlmsg_seq, NLM_F_MULTI,
 					   skb, CTRL_CMD_NEWFAMILY) < 0)
 				goto errout;
@@ -773,7 +773,7 @@ errout:
 }
 
 static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
-					     u32 pid, int seq, u8 cmd)
+					     u32 portid, int seq, u8 cmd)
 {
 	struct sk_buff *skb;
 	int err;
@@ -782,7 +782,7 @@ static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
 	if (skb == NULL)
 		return ERR_PTR(-ENOBUFS);
 
-	err = ctrl_fill_info(family, pid, seq, 0, skb, cmd);
+	err = ctrl_fill_info(family, portid, seq, 0, skb, cmd);
 	if (err < 0) {
 		nlmsg_free(skb);
 		return ERR_PTR(err);
@@ -792,7 +792,7 @@ static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
 }
 
 static struct sk_buff *ctrl_build_mcgrp_msg(struct genl_multicast_group *grp,
-					    u32 pid, int seq, u8 cmd)
+					    u32 portid, int seq, u8 cmd)
 {
 	struct sk_buff *skb;
 	int err;
@@ -801,7 +801,7 @@ static struct sk_buff *ctrl_build_mcgrp_msg(struct genl_multicast_group *grp,
 	if (skb == NULL)
 		return ERR_PTR(-ENOBUFS);
 
-	err = ctrl_fill_mcgrp_info(grp, pid, seq, 0, skb, cmd);
+	err = ctrl_fill_mcgrp_info(grp, portid, seq, 0, skb, cmd);
 	if (err < 0) {
 		nlmsg_free(skb);
 		return ERR_PTR(err);
@@ -853,7 +853,7 @@ static int ctrl_getfamily(struct sk_buff *skb, struct genl_info *info)
 		return -ENOENT;
 	}
 
-	msg = ctrl_build_family_msg(res, info->snd_pid, info->snd_seq,
+	msg = ctrl_build_family_msg(res, info->snd_portid, info->snd_seq,
 				    CTRL_CMD_NEWFAMILY);
 	if (IS_ERR(msg))
 		return PTR_ERR(msg);
@@ -918,11 +918,11 @@ static int __net_init genl_pernet_init(struct net *net)
 	struct netlink_kernel_cfg cfg = {
 		.input		= genl_rcv,
 		.cb_mutex	= &genl_mutex,
+		.flags		= NL_CFG_F_NONROOT_RECV,
 	};
 
 	/* we'll bump the group number right afterwards */
-	net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC,
-					       THIS_MODULE, &cfg);
+	net->genl_sock = netlink_kernel_create(net, NETLINK_GENERIC, &cfg);
 
 	if (!net->genl_sock && net_eq(net, &init_net))
 		panic("GENL: Cannot initialize generic netlink\n");
@@ -955,8 +955,6 @@ static int __init genl_init(void)
 	if (err < 0)
 		goto problem;
 
-	netlink_set_nonroot(NETLINK_GENERIC, NL_NONROOT_RECV);
-
 	err = register_pernet_subsys(&genl_pernet_ops);
 	if (err)
 		goto problem;
@@ -973,7 +971,7 @@ problem:
 
 subsys_initcall(genl_init);
 
-static int genlmsg_mcast(struct sk_buff *skb, u32 pid, unsigned long group,
+static int genlmsg_mcast(struct sk_buff *skb, u32 portid, unsigned long group,
 			 gfp_t flags)
 {
 	struct sk_buff *tmp;
@@ -988,7 +986,7 @@ static int genlmsg_mcast(struct sk_buff *skb, u32 pid, unsigned long group,
 				goto error;
 			}
 			err = nlmsg_multicast(prev->genl_sock, tmp,
-					      pid, group, flags);
+					      portid, group, flags);
 			if (err)
 				goto error;
 		}
@@ -996,20 +994,20 @@ static int genlmsg_mcast(struct sk_buff *skb, u32 pid, unsigned long group,
 		prev = net;
 	}
 
-	return nlmsg_multicast(prev->genl_sock, skb, pid, group, flags);
+	return nlmsg_multicast(prev->genl_sock, skb, portid, group, flags);
  error:
 	kfree_skb(skb);
 	return err;
 }
 
-int genlmsg_multicast_allns(struct sk_buff *skb, u32 pid, unsigned int group,
+int genlmsg_multicast_allns(struct sk_buff *skb, u32 portid, unsigned int group,
 			    gfp_t flags)
 {
-	return genlmsg_mcast(skb, pid, group, flags);
+	return genlmsg_mcast(skb, portid, group, flags);
 }
 EXPORT_SYMBOL(genlmsg_multicast_allns);
 
-void genl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
+void genl_notify(struct sk_buff *skb, struct net *net, u32 portid, u32 group,
 		 struct nlmsghdr *nlh, gfp_t flags)
 {
 	struct sock *sk = net->genl_sock;
@@ -1018,6 +1016,6 @@ void genl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
 	if (nlh)
 		report = nlmsg_report(nlh);
 
-	nlmsg_notify(sk, skb, pid, group, report, flags);
+	nlmsg_notify(sk, skb, portid, group, report, flags);
 }
 EXPORT_SYMBOL(genl_notify);