X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fnetlink%2Faf_netlink.c;h=21f9e30184e20f1eb89d9d726b82d22e8cc3544d;hb=3f25252675770e08d97bc112e52208e8c70ce0e5;hp=de3988ba1f46c45dd0831caeb71b4de0dedb0a63;hpb=d06fc1d9b5518582f4982f908e820f2303d1eece;p=linux-2.6-omap-h63xx.git

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index de3988ba1f4..21f9e30184e 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -156,7 +156,7 @@ static void netlink_sock_destruct(struct sock *sk)
 	skb_queue_purge(&sk->sk_receive_queue);
 
 	if (!sock_flag(sk, SOCK_DEAD)) {
-		printk("Freeing alive netlink socket %p\n", sk);
+		printk(KERN_ERR "Freeing alive netlink socket %p\n", sk);
 		return;
 	}
 	BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
@@ -164,13 +164,14 @@ static void netlink_sock_destruct(struct sock *sk)
 	BUG_TRAP(!nlk_sk(sk)->groups);
 }
 
-/* This lock without WQ_FLAG_EXCLUSIVE is good on UP and it is _very_ bad on SMP.
- * Look, when several writers sleep and reader wakes them up, all but one
+/* This lock without WQ_FLAG_EXCLUSIVE is good on UP and it is _very_ bad on
+ * SMP. Look, when several writers sleep and reader wakes them up, all but one
  * immediately hit write lock and grab all the cpus. Exclusive sleep solves
  * this, _but_ remember, it adds useless work on UP machines.
  */
 
 static void netlink_table_grab(void)
+	__acquires(nl_table_lock)
 {
 	write_lock_irq(&nl_table_lock);
 
@@ -178,7 +179,7 @@ static void netlink_table_grab(void)
 		DECLARE_WAITQUEUE(wait, current);
 
 		add_wait_queue_exclusive(&nl_table_wait, &wait);
-		for(;;) {
+		for (;;) {
 			set_current_state(TASK_UNINTERRUPTIBLE);
 			if (atomic_read(&nl_table_users) == 0)
 				break;
@@ -192,13 +193,14 @@ static void netlink_table_grab(void)
 	}
 }
 
-static __inline__ void netlink_table_ungrab(void)
+static void netlink_table_ungrab(void)
+	__releases(nl_table_lock)
 {
 	write_unlock_irq(&nl_table_lock);
 	wake_up(&nl_table_wait);
 }
 
-static __inline__ void
+static inline void
 netlink_lock_table(void)
 {
 	/* read_lock() synchronizes us to netlink_table_grab */
@@ -208,14 +210,15 @@ netlink_lock_table(void)
 	read_unlock(&nl_table_lock);
 }
 
-static __inline__ void
+static inline void
 netlink_unlock_table(void)
 {
 	if (atomic_dec_and_test(&nl_table_users))
 		wake_up(&nl_table_wait);
 }
 
-static __inline__ struct sock *netlink_lookup(struct net *net, int protocol, u32 pid)
+static inline struct sock *netlink_lookup(struct net *net, int protocol,
+					  u32 pid)
 {
 	struct nl_pid_hash *hash = &nl_table[protocol].hash;
 	struct hlist_head *head;
@@ -236,13 +239,14 @@ found:
 	return sk;
 }
 
-static inline struct hlist_head *nl_pid_hash_alloc(size_t size)
+static inline struct hlist_head *nl_pid_hash_zalloc(size_t size)
 {
 	if (size <= PAGE_SIZE)
-		return kmalloc(size, GFP_ATOMIC);
+		return kzalloc(size, GFP_ATOMIC);
 	else
 		return (struct hlist_head *)
-			__get_free_pages(GFP_ATOMIC, get_order(size));
+			__get_free_pages(GFP_ATOMIC | __GFP_ZERO,
+					 get_order(size));
 }
 
 static inline void nl_pid_hash_free(struct hlist_head *table, size_t size)
@@ -271,11 +275,10 @@ static int nl_pid_hash_rehash(struct nl_pid_hash *hash, int grow)
 		size *= 2;
 	}
 
-	table = nl_pid_hash_alloc(size);
+	table = nl_pid_hash_zalloc(size);
 	if (!table)
 		return 0;
 
-	memset(table, 0, size);
 	otable = hash->table;
 	hash->table = table;
 	hash->mask = mask;
@@ -428,7 +431,7 @@ static int netlink_create(struct net *net, struct socket *sock, int protocol)
 	if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
 		return -ESOCKTNOSUPPORT;
 
-	if (protocol<0 || protocol >= MAX_LINKS)
+	if (protocol < 0 || protocol >= MAX_LINKS)
 		return -EPROTONOSUPPORT;
 
 	netlink_lock_table();
@@ -445,7 +448,8 @@ static int netlink_create(struct net *net, struct socket *sock, int protocol)
 	cb_mutex = nl_table[protocol].cb_mutex;
 	netlink_unlock_table();
 
-	if ((err = __netlink_create(net, sock, cb_mutex, protocol)) < 0)
+	err = __netlink_create(net, sock, cb_mutex, protocol);
+	if (err < 0)
 		goto out_module;
 
 	nlk = nlk_sk(sock->sk);
@@ -590,7 +594,7 @@ static int netlink_realloc_groups(struct sock *sk)
 		err = -ENOMEM;
 		goto out_unlock;
 	}
-	memset((char*)new_groups + NLGRPSZ(nlk->ngroups), 0,
+	memset((char *)new_groups + NLGRPSZ(nlk->ngroups), 0,
 	       NLGRPSZ(groups) - NLGRPSZ(nlk->ngroups));
 
 	nlk->groups = new_groups;
@@ -600,7 +604,8 @@ static int netlink_realloc_groups(struct sock *sk)
 	return err;
 }
 
-static int netlink_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+static int netlink_bind(struct socket *sock, struct sockaddr *addr,
+			int addr_len)
 {
 	struct sock *sk = sock->sk;
 	struct net *net = sk->sk_net;
@@ -651,7 +656,7 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
 	int err = 0;
 	struct sock *sk = sock->sk;
 	struct netlink_sock *nlk = nlk_sk(sk);
-	struct sockaddr_nl *nladdr=(struct sockaddr_nl*)addr;
+	struct sockaddr_nl *nladdr = (struct sockaddr_nl *)addr;
 
 	if (addr->sa_family == AF_UNSPEC) {
 		sk->sk_state	= NETLINK_UNCONNECTED;
@@ -678,11 +683,12 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
 	return err;
 }
 
-static int netlink_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer)
+static int netlink_getname(struct socket *sock, struct sockaddr *addr,
+			   int *addr_len, int peer)
 {
 	struct sock *sk = sock->sk;
 	struct netlink_sock *nlk = nlk_sk(sk);
-	struct sockaddr_nl *nladdr=(struct sockaddr_nl *)addr;
+	struct sockaddr_nl *nladdr = (struct sockaddr_nl *)addr;
 
 	nladdr->nl_family = AF_NETLINK;
 	nladdr->nl_pad = 0;
@@ -885,6 +891,7 @@ retry:
 
 	return netlink_sendskb(sk, skb);
 }
+EXPORT_SYMBOL(netlink_unicast);
 
 int netlink_has_listeners(struct sock *sk, unsigned int group)
 {
@@ -905,7 +912,8 @@ int netlink_has_listeners(struct sock *sk, unsigned int group)
 }
 EXPORT_SYMBOL_GPL(netlink_has_listeners);
 
-static __inline__ int netlink_broadcast_deliver(struct sock *sk, struct sk_buff *skb)
+static inline int netlink_broadcast_deliver(struct sock *sk,
+					    struct sk_buff *skb)
 {
 	struct netlink_sock *nlk = nlk_sk(sk);
 
@@ -1026,6 +1034,7 @@ int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid,
 		return -ENOBUFS;
 	return -ESRCH;
 }
+EXPORT_SYMBOL(netlink_broadcast);
 
 struct netlink_set_err_data {
 	struct sock *exclude_sk;
@@ -1182,7 +1191,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	struct sock_iocb *siocb = kiocb_to_siocb(kiocb);
 	struct sock *sk = sock->sk;
 	struct netlink_sock *nlk = nlk_sk(sk);
-	struct sockaddr_nl *addr=msg->msg_name;
+	struct sockaddr_nl *addr = msg->msg_name;
 	u32 dst_pid;
 	u32 dst_group;
 	struct sk_buff *skb;
@@ -1221,7 +1230,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 		goto out;
 	err = -ENOBUFS;
 	skb = alloc_skb(len, GFP_KERNEL);
-	if (skb==NULL)
+	if (skb == NULL)
 		goto out;
 
 	NETLINK_CB(skb).pid	= nlk->pid;
@@ -1237,7 +1246,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	 */
 
 	err = -EFAULT;
-	if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) {
+	if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
 		kfree_skb(skb);
 		goto out;
 	}
@@ -1276,8 +1285,8 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
 
 	copied = 0;
 
-	skb = skb_recv_datagram(sk,flags,noblock,&err);
-	if (skb==NULL)
+	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	if (skb == NULL)
 		goto out;
 
 	msg->msg_namelen = 0;
@@ -1292,7 +1301,7 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
 	err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 
 	if (msg->msg_name) {
-		struct sockaddr_nl *addr = (struct sockaddr_nl*)msg->msg_name;
+		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;
@@ -1344,7 +1353,7 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups,
 
 	BUG_ON(!nl_table);
 
-	if (unit<0 || unit>=MAX_LINKS)
+	if (unit < 0 || unit >= MAX_LINKS)
 		return NULL;
 
 	if (sock_create_lite(PF_NETLINK, SOCK_DGRAM, unit, &sock))
@@ -1390,6 +1399,7 @@ out_sock_release:
 	sock_release(sock);
 	return NULL;
 }
+EXPORT_SYMBOL(netlink_kernel_create);
 
 /**
  * netlink_change_ngroups - change number of multicast groups
@@ -1461,6 +1471,7 @@ 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);
 
 static void netlink_destroy_callback(struct netlink_callback *cb)
 {
@@ -1529,8 +1540,9 @@ errout:
 
 int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
 		       struct nlmsghdr *nlh,
-		       int (*dump)(struct sk_buff *skb, struct netlink_callback*),
-		       int (*done)(struct netlink_callback*))
+		       int (*dump)(struct sk_buff *skb,
+				   struct netlink_callback *),
+		       int (*done)(struct netlink_callback *))
 {
 	struct netlink_callback *cb;
 	struct sock *sk;
@@ -1571,6 +1583,7 @@ int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
 	 */
 	return -EINTR;
 }
+EXPORT_SYMBOL(netlink_dump_start);
 
 void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
 {
@@ -1605,6 +1618,7 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
 	memcpy(&errmsg->msg, nlh, err ? nlh->nlmsg_len : sizeof(*nlh));
 	netlink_unicast(in_skb->sk, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
 }
+EXPORT_SYMBOL(netlink_ack);
 
 int netlink_rcv_skb(struct sk_buff *skb, int (*cb)(struct sk_buff *,
 						     struct nlmsghdr *))
@@ -1638,7 +1652,7 @@ ack:
 			netlink_ack(skb, nlh, err);
 
 skip:
-	        msglen = NLMSG_ALIGN(nlh->nlmsg_len);
+		msglen = NLMSG_ALIGN(nlh->nlmsg_len);
 		if (msglen > skb->len)
 			msglen = skb->len;
 		skb_pull(skb, msglen);
@@ -1646,6 +1660,7 @@ skip:
 
 	return 0;
 }
+EXPORT_SYMBOL(netlink_rcv_skb);
 
 /**
  * nlmsg_notify - send a notification netlink message
@@ -1678,10 +1693,11 @@ int nlmsg_notify(struct sock *sk, struct sk_buff *skb, u32 pid,
 
 	return err;
 }
+EXPORT_SYMBOL(nlmsg_notify);
 
 #ifdef CONFIG_PROC_FS
 struct nl_seq_iter {
-	struct net *net;
+	struct seq_net_private p;
 	int link;
 	int hash_idx;
 };
@@ -1694,12 +1710,12 @@ static struct sock *netlink_seq_socket_idx(struct seq_file *seq, loff_t pos)
 	struct hlist_node *node;
 	loff_t off = 0;
 
-	for (i=0; i<MAX_LINKS; i++) {
+	for (i = 0; i < MAX_LINKS; i++) {
 		struct nl_pid_hash *hash = &nl_table[i].hash;
 
 		for (j = 0; j <= hash->mask; j++) {
 			sk_for_each(s, node, &hash->table[j]) {
-				if (iter->net != s->sk_net)
+				if (iter->p.net != s->sk_net)
 					continue;
 				if (off == pos) {
 					iter->link = i;
@@ -1714,6 +1730,7 @@ static struct sock *netlink_seq_socket_idx(struct seq_file *seq, loff_t pos)
 }
 
 static void *netlink_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(nl_table_lock)
 {
 	read_lock(&nl_table_lock);
 	return *pos ? netlink_seq_socket_idx(seq, *pos - 1) : SEQ_START_TOKEN;
@@ -1734,7 +1751,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 	s = v;
 	do {
 		s = sk_next(s);
-	} while (s && (iter->net != s->sk_net));
+	} while (s && (iter->p.net != s->sk_net));
 	if (s)
 		return s;
 
@@ -1746,7 +1763,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 
 		for (; j <= hash->mask; j++) {
 			s = sk_head(&hash->table[j]);
-			while (s && (iter->net != s->sk_net))
+			while (s && (iter->p.net != s->sk_net))
 				s = sk_next(s);
 			if (s) {
 				iter->link = i;
@@ -1762,6 +1779,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void netlink_seq_stop(struct seq_file *seq, void *v)
+	__releases(nl_table_lock)
 {
 	read_unlock(&nl_table_lock);
 }
@@ -1802,27 +1820,8 @@ static const struct seq_operations netlink_seq_ops = {
 
 static int netlink_seq_open(struct inode *inode, struct file *file)
 {
-	struct nl_seq_iter *iter;
-
-	iter = __seq_open_private(file, &netlink_seq_ops, sizeof(*iter));
-	if (!iter)
-		return -ENOMEM;
-
-	iter->net = get_proc_net(inode);
-	if (!iter->net) {
-		seq_release_private(inode, file);
-		return -ENXIO;
-	}
-
-	return 0;
-}
-
-static int netlink_seq_release(struct inode *inode, struct file *file)
-{
-	struct seq_file *seq = file->private_data;
-	struct nl_seq_iter *iter = seq->private;
-	put_net(iter->net);
-	return seq_release_private(inode, file);
+	return seq_open_net(inode, file, &netlink_seq_ops,
+				sizeof(struct nl_seq_iter));
 }
 
 static const struct file_operations netlink_seq_fops = {
@@ -1830,7 +1829,7 @@ static const struct file_operations netlink_seq_fops = {
 	.open		= netlink_seq_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= netlink_seq_release,
+	.release	= seq_release_net,
 };
 
 #endif
@@ -1839,11 +1838,13 @@ int netlink_register_notifier(struct notifier_block *nb)
 {
 	return atomic_notifier_chain_register(&netlink_chain, nb);
 }
+EXPORT_SYMBOL(netlink_register_notifier);
 
 int netlink_unregister_notifier(struct notifier_block *nb)
 {
 	return atomic_notifier_chain_unregister(&netlink_chain, nb);
 }
+EXPORT_SYMBOL(netlink_unregister_notifier);
 
 static const struct proto_ops netlink_ops = {
 	.family =	PF_NETLINK,
@@ -1922,7 +1923,7 @@ static int __init netlink_proto_init(void)
 	for (i = 0; i < MAX_LINKS; i++) {
 		struct nl_pid_hash *hash = &nl_table[i].hash;
 
-		hash->table = nl_pid_hash_alloc(1 * sizeof(*hash->table));
+		hash->table = nl_pid_hash_zalloc(1 * sizeof(*hash->table));
 		if (!hash->table) {
 			while (i-- > 0)
 				nl_pid_hash_free(nl_table[i].hash.table,
@@ -1930,7 +1931,6 @@ static int __init netlink_proto_init(void)
 			kfree(nl_table);
 			goto panic;
 		}
-		memset(hash->table, 0, 1 * sizeof(*hash->table));
 		hash->max_shift = order;
 		hash->shift = 0;
 		hash->mask = 0;
@@ -1948,14 +1948,3 @@ panic:
 }
 
 core_initcall(netlink_proto_init);
-
-EXPORT_SYMBOL(netlink_ack);
-EXPORT_SYMBOL(netlink_rcv_skb);
-EXPORT_SYMBOL(netlink_broadcast);
-EXPORT_SYMBOL(netlink_dump_start);
-EXPORT_SYMBOL(netlink_kernel_create);
-EXPORT_SYMBOL(netlink_register_notifier);
-EXPORT_SYMBOL(netlink_set_nonroot);
-EXPORT_SYMBOL(netlink_unicast);
-EXPORT_SYMBOL(netlink_unregister_notifier);
-EXPORT_SYMBOL(nlmsg_notify);