4 files changed, 161 insertions, 71 deletions

diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index b982b5b..c45ccd6 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -312,6 +312,8 @@ int nfc_llcp_send_symm(struct nfc_dev *dev)
 
 	skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
 
+	nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
+
 	return nfc_data_exchange(dev, local->target_idx, skb,
 				 nfc_llcp_recv, local);
 }
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 82f0f75..c12c5ef 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -56,7 +56,7 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 	sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
 		llcp_sock = nfc_llcp_sock(sk);
 
-		lock_sock(sk);
+		bh_lock_sock(sk);
 
 		if (sk->sk_state == LLCP_CONNECTED)
 			nfc_put_device(llcp_sock->dev);
@@ -68,26 +68,26 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen)
 			list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
 						 accept_queue) {
 				accept_sk = &lsk->sk;
-				lock_sock(accept_sk);
+				bh_lock_sock(accept_sk);
 
 				nfc_llcp_accept_unlink(accept_sk);
 
 				accept_sk->sk_state = LLCP_CLOSED;
 
-				release_sock(accept_sk);
+				bh_unlock_sock(accept_sk);
 
 				sock_orphan(accept_sk);
 			}
 
 			if (listen == true) {
-				release_sock(sk);
+				bh_unlock_sock(sk);
 				continue;
 			}
 		}
 
 		sk->sk_state = LLCP_CLOSED;
 
-		release_sock(sk);
+		bh_unlock_sock(sk);
 
 		sock_orphan(sk);
 
@@ -114,9 +114,9 @@ static void local_release(struct kref *ref)
 	nfc_llcp_socket_release(local, false);
 	del_timer_sync(&local->link_timer);
 	skb_queue_purge(&local->tx_queue);
-	destroy_workqueue(local->tx_wq);
-	destroy_workqueue(local->rx_wq);
-	destroy_workqueue(local->timeout_wq);
+	cancel_work_sync(&local->tx_work);
+	cancel_work_sync(&local->rx_work);
+	cancel_work_sync(&local->timeout_work);
 	kfree_skb(local->rx_pending);
 	kfree(local);
 }
@@ -181,7 +181,7 @@ static void nfc_llcp_symm_timer(unsigned long data)
 
 	pr_err("SYMM timeout\n");
 
-	queue_work(local->timeout_wq, &local->timeout_work);
+	queue_work(system_nrt_wq, &local->timeout_work);
 }
 
 struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
@@ -426,6 +426,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 	u8 *miux_tlv, miux_length;
 	__be16 miux;
 	u8 gb_len = 0;
+	int ret = 0;
 
 	version = LLCP_VERSION_11;
 	version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version,
@@ -450,8 +451,8 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 	gb_len += ARRAY_SIZE(llcp_magic);
 
 	if (gb_len > NFC_MAX_GT_LEN) {
-		kfree(version_tlv);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	gb_cur = local->gb;
@@ -471,12 +472,15 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
 	memcpy(gb_cur, miux_tlv, miux_length);
 	gb_cur += miux_length;
 
+	local->gb_len = gb_len;
+
+out:
 	kfree(version_tlv);
 	kfree(lto_tlv);
+	kfree(wks_tlv);
+	kfree(miux_tlv);
 
-	local->gb_len = gb_len;
-
-	return 0;
+	return ret;
 }
 
 u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)
@@ -554,6 +558,46 @@ static void nfc_llcp_set_nrns(struct nfc_llcp_sock *sock, struct sk_buff *pdu)
 	sock->recv_ack_n = (sock->recv_n - 1) % 16;
 }
 
+void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
+			       struct sk_buff *skb, u8 direction)
+{
+	struct hlist_node *node;
+	struct sk_buff *skb_copy = NULL, *nskb;
+	struct sock *sk;
+	u8 *data;
+
+	read_lock(&local->raw_sockets.lock);
+
+	sk_for_each(sk, node, &local->raw_sockets.head) {
+		if (sk->sk_state != LLCP_BOUND)
+			continue;
+
+		if (skb_copy == NULL) {
+			skb_copy = __pskb_copy(skb, NFC_LLCP_RAW_HEADER_SIZE,
+					       GFP_ATOMIC);
+
+			if (skb_copy == NULL)
+				continue;
+
+			data = skb_push(skb_copy, NFC_LLCP_RAW_HEADER_SIZE);
+
+			data[0] = local->dev ? local->dev->idx : 0xFF;
+			data[1] = direction;
+		}
+
+		nskb = skb_clone(skb_copy, GFP_ATOMIC);
+		if (!nskb)
+			continue;
+
+		if (sock_queue_rcv_skb(sk, nskb))
+			kfree_skb(nskb);
+	}
+
+	read_unlock(&local->raw_sockets.lock);
+
+	kfree_skb(skb_copy);
+}
+
 static void nfc_llcp_tx_work(struct work_struct *work)
 {
 	struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
@@ -574,6 +618,9 @@ static void nfc_llcp_tx_work(struct work_struct *work)
 				       DUMP_PREFIX_OFFSET, 16, 1,
 				       skb->data, skb->len, true);
 
+			nfc_llcp_send_to_raw_sock(local, skb,
+						  NFC_LLCP_DIRECTION_TX);
+
 			ret = nfc_data_exchange(local->dev, local->target_idx,
 						skb, nfc_llcp_recv, local);
 
@@ -1018,6 +1065,8 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 		print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET,
 			       16, 1, skb->data, skb->len, true);
 
+	nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
+
 	switch (ptype) {
 	case LLCP_PDU_SYMM:
 		pr_debug("SYMM\n");
@@ -1052,7 +1101,7 @@ static void nfc_llcp_rx_work(struct work_struct *work)
 
 	}
 
-	queue_work(local->tx_wq, &local->tx_work);
+	queue_work(system_nrt_wq, &local->tx_work);
 	kfree_skb(local->rx_pending);
 	local->rx_pending = NULL;
 
@@ -1071,7 +1120,7 @@ void nfc_llcp_recv(void *data, struct sk_buff *skb, int err)
 
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
-	queue_work(local->rx_wq, &local->rx_work);
+	queue_work(system_nrt_wq, &local->rx_work);
 
 	return;
 }
@@ -1086,7 +1135,7 @@ int nfc_llcp_data_received(struct nfc_dev *dev, struct sk_buff *skb)
 
 	local->rx_pending = skb_get(skb);
 	del_timer(&local->link_timer);
-	queue_work(local->rx_wq, &local->rx_work);
+	queue_work(system_nrt_wq, &local->rx_work);
 
 	return 0;
 }
@@ -1121,7 +1170,7 @@ void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
 	if (rf_mode == NFC_RF_INITIATOR) {
 		pr_debug("Queueing Tx work\n");
 
-		queue_work(local->tx_wq, &local->tx_work);
+		queue_work(system_nrt_wq, &local->tx_work);
 	} else {
 		mod_timer(&local->link_timer,
 			  jiffies + msecs_to_jiffies(local->remote_lto));
@@ -1130,10 +1179,7 @@ void nfc_llcp_mac_is_up(struct nfc_dev *dev, u32 target_idx,
 
 int nfc_llcp_register_device(struct nfc_dev *ndev)
 {
-	struct device *dev = &ndev->dev;
 	struct nfc_llcp_local *local;
-	char name[32];
-	int err;
 
 	local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL);
 	if (local == NULL)
@@ -1149,41 +1195,15 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
 
 	skb_queue_head_init(&local->tx_queue);
 	INIT_WORK(&local->tx_work, nfc_llcp_tx_work);
-	snprintf(name, sizeof(name), "%s_llcp_tx_wq", dev_name(dev));
-	local->tx_wq =
-		alloc_workqueue(name,
-				WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
-				1);
-	if (local->tx_wq == NULL) {
-		err = -ENOMEM;
-		goto err_local;
-	}
 
 	local->rx_pending = NULL;
 	INIT_WORK(&local->rx_work, nfc_llcp_rx_work);
-	snprintf(name, sizeof(name), "%s_llcp_rx_wq", dev_name(dev));
-	local->rx_wq =
-		alloc_workqueue(name,
-				WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
-				1);
-	if (local->rx_wq == NULL) {
-		err = -ENOMEM;
-		goto err_tx_wq;
-	}
 
 	INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work);
-	snprintf(name, sizeof(name), "%s_llcp_timeout_wq", dev_name(dev));
-	local->timeout_wq =
-		alloc_workqueue(name,
-				WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
-				1);
-	if (local->timeout_wq == NULL) {
-		err = -ENOMEM;
-		goto err_rx_wq;
-	}
 
-	local->sockets.lock = __RW_LOCK_UNLOCKED(local->sockets.lock);
-	local->connecting_sockets.lock = __RW_LOCK_UNLOCKED(local->connecting_sockets.lock);
+	rwlock_init(&local->sockets.lock);
+	rwlock_init(&local->connecting_sockets.lock);
+	rwlock_init(&local->raw_sockets.lock);
 
 	nfc_llcp_build_gb(local);
 
@@ -1193,17 +1213,6 @@ int nfc_llcp_register_device(struct nfc_dev *ndev)
 	list_add(&llcp_devices, &local->list);
 
 	return 0;
-
-err_rx_wq:
-	destroy_workqueue(local->rx_wq);
-
-err_tx_wq:
-	destroy_workqueue(local->tx_wq);
-
-err_local:
-	kfree(local);
-
-	return 0;
 }
 
 void nfc_llcp_unregister_device(struct nfc_dev *dev)
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 83b8bba..fdb2d24 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -56,12 +56,9 @@ struct nfc_llcp_local {
 
 	struct timer_list link_timer;
 	struct sk_buff_head tx_queue;
-	struct workqueue_struct	*tx_wq;
 	struct work_struct	 tx_work;
-	struct workqueue_struct	*rx_wq;
 	struct work_struct	 rx_work;
 	struct sk_buff *rx_pending;
-	struct workqueue_struct	*timeout_wq;
 	struct work_struct	 timeout_work;
 
 	u32 target_idx;
@@ -89,6 +86,7 @@ struct nfc_llcp_local {
 	/* sockets array */
 	struct llcp_sock_list sockets;
 	struct llcp_sock_list connecting_sockets;
+	struct llcp_sock_list raw_sockets;
 };
 
 struct nfc_llcp_sock {
@@ -187,6 +185,8 @@ u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
 u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
 void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
 int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
+void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
+			       struct sk_buff *skb, u8 direction);
 
 /* Sock API */
 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index ddeb9aa..40f056d 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -142,6 +142,60 @@ error:
 	return ret;
 }
 
+static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
+			      int alen)
+{
+	struct sock *sk = sock->sk;
+	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+	struct nfc_llcp_local *local;
+	struct nfc_dev *dev;
+	struct sockaddr_nfc_llcp llcp_addr;
+	int len, ret = 0;
+
+	if (!addr || addr->sa_family != AF_NFC)
+		return -EINVAL;
+
+	pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
+
+	memset(&llcp_addr, 0, sizeof(llcp_addr));
+	len = min_t(unsigned int, sizeof(llcp_addr), alen);
+	memcpy(&llcp_addr, addr, len);
+
+	lock_sock(sk);
+
+	if (sk->sk_state != LLCP_CLOSED) {
+		ret = -EBADFD;
+		goto error;
+	}
+
+	dev = nfc_get_device(llcp_addr.dev_idx);
+	if (dev == NULL) {
+		ret = -ENODEV;
+		goto error;
+	}
+
+	local = nfc_llcp_find_local(dev);
+	if (local == NULL) {
+		ret = -ENODEV;
+		goto put_dev;
+	}
+
+	llcp_sock->dev = dev;
+	llcp_sock->local = nfc_llcp_local_get(local);
+	llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
+
+	nfc_llcp_sock_link(&local->raw_sockets, sk);
+
+	sk->sk_state = LLCP_BOUND;
+
+put_dev:
+	nfc_put_device(dev);
+
+error:
+	release_sock(sk);
+	return ret;
+}
+
 static int llcp_sock_listen(struct socket *sock, int backlog)
 {
 	struct sock *sk = sock->sk;
@@ -300,9 +354,6 @@ static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
 	pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
 		 llcp_sock->dsap, llcp_sock->ssap);
 
-	if (llcp_sock == NULL || llcp_sock->dev == NULL)
-		return -EBADFD;
-
 	uaddr->sa_family = AF_NFC;
 
 	*len = sizeof(struct sockaddr_nfc_llcp);
@@ -421,7 +472,10 @@ static int llcp_sock_release(struct socket *sock)
 
 	release_sock(sk);
 
-	nfc_llcp_sock_unlink(&local->sockets, sk);
+	if (sock->type == SOCK_RAW)
+		nfc_llcp_sock_unlink(&local->raw_sockets, sk);
+	else
+		nfc_llcp_sock_unlink(&local->sockets, sk);
 
 out:
 	sock_orphan(sk);
@@ -617,7 +671,7 @@ static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 	if (!(flags & MSG_PEEK)) {
 
 		/* SOCK_STREAM: re-queue skb if it contains unreceived data */
-		if (sk->sk_type == SOCK_STREAM) {
+		if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) {
 			skb_pull(skb, copied);
 			if (skb->len) {
 				skb_queue_head(&sk->sk_receive_queue, skb);
@@ -658,6 +712,26 @@ static const struct proto_ops llcp_sock_ops = {
 	.mmap           = sock_no_mmap,
 };
 
+static const struct proto_ops llcp_rawsock_ops = {
+	.family         = PF_NFC,
+	.owner          = THIS_MODULE,
+	.bind           = llcp_raw_sock_bind,
+	.connect        = sock_no_connect,
+	.release        = llcp_sock_release,
+	.socketpair     = sock_no_socketpair,
+	.accept         = sock_no_accept,
+	.getname        = llcp_sock_getname,
+	.poll           = llcp_sock_poll,
+	.ioctl          = sock_no_ioctl,
+	.listen         = sock_no_listen,
+	.shutdown       = sock_no_shutdown,
+	.setsockopt     = sock_no_setsockopt,
+	.getsockopt     = sock_no_getsockopt,
+	.sendmsg        = sock_no_sendmsg,
+	.recvmsg        = llcp_sock_recvmsg,
+	.mmap           = sock_no_mmap,
+};
+
 static void llcp_sock_destruct(struct sock *sk)
 {
 	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
@@ -735,10 +809,15 @@ static int llcp_sock_create(struct net *net, struct socket *sock,
 
 	pr_debug("%p\n", sock);
 
-	if (sock->type != SOCK_STREAM && sock->type != SOCK_DGRAM)
+	if (sock->type != SOCK_STREAM &&
+	    sock->type != SOCK_DGRAM &&
+	    sock->type != SOCK_RAW)
 		return -ESOCKTNOSUPPORT;
 
-	sock->ops = &llcp_sock_ops;
+	if (sock->type == SOCK_RAW)
+		sock->ops = &llcp_rawsock_ops;
+	else
+		sock->ops = &llcp_sock_ops;
 
 	sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC);
 	if (sk == NULL)