1 files changed, 237 insertions, 192 deletions

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index fa642aa652b..754b6fe4f74 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -26,22 +26,8 @@
  */
 
 #include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/init.h>
-#include <linux/wait.h>
-#include <linux/device.h>
 #include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/net.h>
-#include <linux/mutex.h>
 #include <linux/kthread.h>
-#include <linux/slab.h>
-
-#include <net/sock.h>
-#include <asm/uaccess.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -51,10 +37,10 @@
 
 #define VERSION "1.11"
 
-static int disable_cfc = 0;
+static bool disable_cfc;
+static bool l2cap_ertm;
 static int channel_mtu = -1;
 static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU;
-static int l2cap_ertm = 0;
 
 static struct task_struct *rfcomm_thread;
 
@@ -62,7 +48,6 @@ static DEFINE_MUTEX(rfcomm_mutex);
 #define rfcomm_lock()	mutex_lock(&rfcomm_mutex)
 #define rfcomm_unlock()	mutex_unlock(&rfcomm_mutex)
 
-static unsigned long rfcomm_event;
 
 static LIST_HEAD(session_list);
 
@@ -84,7 +69,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
 							u8 sec_level,
 							int *err);
 static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst);
-static void rfcomm_session_del(struct rfcomm_session *s);
+static struct rfcomm_session *rfcomm_session_del(struct rfcomm_session *s);
 
 /* ---- RFCOMM frame parsing macros ---- */
 #define __get_dlci(b)     ((b & 0xfc) >> 2)
@@ -116,20 +101,13 @@ static void rfcomm_session_del(struct rfcomm_session *s);
 #define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1)
 #define __get_rpn_parity(line)    (((line) >> 3) & 0x7)
 
-static inline void rfcomm_schedule(void)
+static void rfcomm_schedule(void)
 {
 	if (!rfcomm_thread)
 		return;
-	set_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event);
 	wake_up_process(rfcomm_thread);
 }
 
-static inline void rfcomm_session_put(struct rfcomm_session *s)
-{
-	if (atomic_dec_and_test(&s->refcnt))
-		rfcomm_session_del(s);
-}
-
 /* ---- RFCOMM FCS computation ---- */
 
 /* reversed, 8-bit, poly=0x07 */
@@ -208,9 +186,9 @@ static void rfcomm_l2state_change(struct sock *sk)
 	rfcomm_schedule();
 }
 
-static void rfcomm_l2data_ready(struct sock *sk, int bytes)
+static void rfcomm_l2data_ready(struct sock *sk)
 {
-	BT_DBG("%p bytes %d", sk, bytes);
+	BT_DBG("%p", sk);
 	rfcomm_schedule();
 }
 
@@ -229,13 +207,16 @@ static int rfcomm_l2sock_create(struct socket **sock)
 	return err;
 }
 
-static inline int rfcomm_check_security(struct rfcomm_dlc *d)
+static int rfcomm_check_security(struct rfcomm_dlc *d)
 {
 	struct sock *sk = d->session->sock->sk;
+	struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn;
+
 	__u8 auth_type;
 
 	switch (d->sec_level) {
 	case BT_SECURITY_HIGH:
+	case BT_SECURITY_FIPS:
 		auth_type = HCI_AT_GENERAL_BONDING_MITM;
 		break;
 	case BT_SECURITY_MEDIUM:
@@ -246,8 +227,7 @@ static inline int rfcomm_check_security(struct rfcomm_dlc *d)
 		break;
 	}
 
-	return hci_conn_security(l2cap_pi(sk)->conn->hcon, d->sec_level,
-								auth_type);
+	return hci_conn_security(conn->hcon, d->sec_level, auth_type);
 }
 
 static void rfcomm_session_timeout(unsigned long arg)
@@ -264,16 +244,14 @@ static void rfcomm_session_set_timer(struct rfcomm_session *s, long timeout)
 {
 	BT_DBG("session %p state %ld timeout %ld", s, s->state, timeout);
 
-	if (!mod_timer(&s->timer, jiffies + timeout))
-		rfcomm_session_hold(s);
+	mod_timer(&s->timer, jiffies + timeout);
 }
 
 static void rfcomm_session_clear_timer(struct rfcomm_session *s)
 {
 	BT_DBG("session %p state %ld", s, s->state);
 
-	if (timer_pending(&s->timer) && del_timer(&s->timer))
-		rfcomm_session_put(s);
+	del_timer_sync(&s->timer);
 }
 
 /* ---- RFCOMM DLCs ---- */
@@ -300,7 +278,7 @@ static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d)
 {
 	BT_DBG("dlc %p state %ld", d, d->state);
 
-	if (timer_pending(&d->timer) && del_timer(&d->timer))
+	if (del_timer(&d->timer))
 		rfcomm_dlc_put(d);
 }
 
@@ -311,6 +289,7 @@ static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d)
 	d->state      = BT_OPEN;
 	d->flags      = 0;
 	d->mscex      = 0;
+	d->sec_level  = BT_SECURITY_LOW;
 	d->mtu        = RFCOMM_DEFAULT_MTU;
 	d->v24_sig    = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV;
 
@@ -328,7 +307,7 @@ struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio)
 	setup_timer(&d->timer, rfcomm_dlc_timeout, (unsigned long)d);
 
 	skb_queue_head_init(&d->tx_queue);
-	spin_lock_init(&d->lock);
+	mutex_init(&d->lock);
 	atomic_set(&d->refcnt, 1);
 
 	rfcomm_dlc_clear_state(d);
@@ -350,8 +329,6 @@ static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d)
 {
 	BT_DBG("dlc %p session %p", d, s);
 
-	rfcomm_session_hold(s);
-
 	rfcomm_session_clear_timer(s);
 	rfcomm_dlc_hold(d);
 	list_add(&d->list, &s->dlcs);
@@ -370,33 +347,34 @@ static void rfcomm_dlc_unlink(struct rfcomm_dlc *d)
 
 	if (list_empty(&s->dlcs))
 		rfcomm_session_set_timer(s, RFCOMM_IDLE_TIMEOUT);
-
-	rfcomm_session_put(s);
 }
 
 static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci)
 {
 	struct rfcomm_dlc *d;
-	struct list_head *p;
 
-	list_for_each(p, &s->dlcs) {
-		d = list_entry(p, struct rfcomm_dlc, list);
+	list_for_each_entry(d, &s->dlcs, list)
 		if (d->dlci == dlci)
 			return d;
-	}
+
 	return NULL;
 }
 
+static int rfcomm_check_channel(u8 channel)
+{
+	return channel < 1 || channel > 30;
+}
+
 static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel)
 {
 	struct rfcomm_session *s;
 	int err = 0;
 	u8 dlci;
 
-	BT_DBG("dlc %p state %ld %s %s channel %d",
-			d, d->state, batostr(src), batostr(dst), channel);
+	BT_DBG("dlc %p state %ld %pMR -> %pMR channel %d",
+	       d, d->state, src, dst, channel);
 
-	if (channel < 1 || channel > 30)
+	if (rfcomm_check_channel(channel))
 		return -EINVAL;
 
 	if (d->state != BT_OPEN && d->state != BT_CLOSED)
@@ -453,6 +431,20 @@ int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 chann
 	return r;
 }
 
+static void __rfcomm_dlc_disconn(struct rfcomm_dlc *d)
+{
+	struct rfcomm_session *s = d->session;
+
+	d->state = BT_DISCONN;
+	if (skb_queue_empty(&d->tx_queue)) {
+		rfcomm_send_disc(s, d->dlci);
+		rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT);
+	} else {
+		rfcomm_queue_disc(d);
+		rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2);
+	}
+}
+
 static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
 {
 	struct rfcomm_session *s = d->session;
@@ -465,32 +457,29 @@ static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
 	switch (d->state) {
 	case BT_CONNECT:
 	case BT_CONFIG:
+	case BT_OPEN:
+	case BT_CONNECT2:
 		if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
 			set_bit(RFCOMM_AUTH_REJECT, &d->flags);
 			rfcomm_schedule();
-			break;
+			return 0;
 		}
-		/* Fall through */
+	}
 
+	switch (d->state) {
+	case BT_CONNECT:
 	case BT_CONNECTED:
-		d->state = BT_DISCONN;
-		if (skb_queue_empty(&d->tx_queue)) {
-			rfcomm_send_disc(s, d->dlci);
-			rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT);
-		} else {
-			rfcomm_queue_disc(d);
-			rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2);
-		}
+		__rfcomm_dlc_disconn(d);
 		break;
 
-	case BT_OPEN:
-	case BT_CONNECT2:
-		if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) {
-			set_bit(RFCOMM_AUTH_REJECT, &d->flags);
-			rfcomm_schedule();
+	case BT_CONFIG:
+		if (s->state != BT_BOUND) {
+			__rfcomm_dlc_disconn(d);
 			break;
 		}
-		/* Fall through */
+		/* if closing a dlc in a session that hasn't been started,
+		 * just close and unlink the dlc
+		 */
 
 	default:
 		rfcomm_dlc_clear_timer(d);
@@ -509,16 +498,57 @@ static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
 
 int rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
 {
-	int r;
+	int r = 0;
+	struct rfcomm_dlc *d_list;
+	struct rfcomm_session *s, *s_list;
+
+	BT_DBG("dlc %p state %ld dlci %d err %d", d, d->state, d->dlci, err);
 
 	rfcomm_lock();
 
-	r = __rfcomm_dlc_close(d, err);
+	s = d->session;
+	if (!s)
+		goto no_session;
+
+	/* after waiting on the mutex check the session still exists
+	 * then check the dlc still exists
+	 */
+	list_for_each_entry(s_list, &session_list, list) {
+		if (s_list == s) {
+			list_for_each_entry(d_list, &s->dlcs, list) {
+				if (d_list == d) {
+					r = __rfcomm_dlc_close(d, err);
+					break;
+				}
+			}
+			break;
+		}
+	}
 
+no_session:
 	rfcomm_unlock();
 	return r;
 }
 
+struct rfcomm_dlc *rfcomm_dlc_exists(bdaddr_t *src, bdaddr_t *dst, u8 channel)
+{
+	struct rfcomm_session *s;
+	struct rfcomm_dlc *dlc = NULL;
+	u8 dlci;
+
+	if (rfcomm_check_channel(channel))
+		return ERR_PTR(-EINVAL);
+
+	rfcomm_lock();
+	s = rfcomm_session_get(src, dst);
+	if (s) {
+		dlci = __dlci(!s->initiator, channel);
+		dlc = rfcomm_dlc_get(s, dlci);
+	}
+	rfcomm_unlock();
+	return dlc;
+}
+
 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
 {
 	int len = skb->len;
@@ -539,6 +569,20 @@ int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
 	return len;
 }
 
+void rfcomm_dlc_send_noerror(struct rfcomm_dlc *d, struct sk_buff *skb)
+{
+	int len = skb->len;
+
+	BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len);
+
+	rfcomm_make_uih(skb, d->addr);
+	skb_queue_tail(&d->tx_queue, skb);
+
+	if (d->state == BT_CONNECTED &&
+	    !test_bit(RFCOMM_TX_THROTTLED, &d->flags))
+		rfcomm_schedule();
+}
+
 void __rfcomm_dlc_throttle(struct rfcomm_dlc *d)
 {
 	BT_DBG("dlc %p state %ld", d, d->state);
@@ -625,7 +669,7 @@ static struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state)
 	return s;
 }
 
-static void rfcomm_session_del(struct rfcomm_session *s)
+static struct rfcomm_session *rfcomm_session_del(struct rfcomm_session *s)
 {
 	int state = s->state;
 
@@ -633,44 +677,42 @@ static void rfcomm_session_del(struct rfcomm_session *s)
 
 	list_del(&s->list);
 
-	if (state == BT_CONNECTED)
-		rfcomm_send_disc(s, 0);
-
 	rfcomm_session_clear_timer(s);
 	sock_release(s->sock);
 	kfree(s);
 
 	if (state != BT_LISTEN)
 		module_put(THIS_MODULE);
+
+	return NULL;
 }
 
 static struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst)
 {
 	struct rfcomm_session *s;
 	struct list_head *p, *n;
-	struct bt_sock *sk;
+	struct l2cap_chan *chan;
 	list_for_each_safe(p, n, &session_list) {
 		s = list_entry(p, struct rfcomm_session, list);
-		sk = bt_sk(s->sock->sk);
+		chan = l2cap_pi(s->sock->sk)->chan;
 
-		if ((!bacmp(src, BDADDR_ANY) || !bacmp(&sk->src, src)) &&
-				!bacmp(&sk->dst, dst))
+		if ((!bacmp(src, BDADDR_ANY) || !bacmp(&chan->src, src)) &&
+		    !bacmp(&chan->dst, dst))
 			return s;
 	}
 	return NULL;
 }
 
-static void rfcomm_session_close(struct rfcomm_session *s, int err)
+static struct rfcomm_session *rfcomm_session_close(struct rfcomm_session *s,
+						   int err)
 {
 	struct rfcomm_dlc *d;
 	struct list_head *p, *n;
 
-	BT_DBG("session %p state %ld err %d", s, s->state, err);
-
-	rfcomm_session_hold(s);
-
 	s->state = BT_CLOSED;
 
+	BT_DBG("session %p state %ld err %d", s, s->state, err);
+
 	/* Close all dlcs */
 	list_for_each_safe(p, n, &s->dlcs) {
 		d = list_entry(p, struct rfcomm_dlc, list);
@@ -679,7 +721,7 @@ static void rfcomm_session_close(struct rfcomm_session *s, int err)
 	}
 
 	rfcomm_session_clear_timer(s);
-	rfcomm_session_put(s);
+	return rfcomm_session_del(s);
 }
 
 static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
@@ -692,7 +734,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
 	struct socket *sock;
 	struct sock *sk;
 
-	BT_DBG("%s %s", batostr(src), batostr(dst));
+	BT_DBG("%pMR -> %pMR", src, dst);
 
 	*err = rfcomm_l2sock_create(&sock);
 	if (*err < 0)
@@ -702,6 +744,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
 	addr.l2_family = AF_BLUETOOTH;
 	addr.l2_psm    = 0;
 	addr.l2_cid    = 0;
+	addr.l2_bdaddr_type = BDADDR_BREDR;
 	*err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
 	if (*err < 0)
 		goto failed;
@@ -709,10 +752,10 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
 	/* Set L2CAP options */
 	sk = sock->sk;
 	lock_sock(sk);
-	l2cap_pi(sk)->imtu = l2cap_mtu;
-	l2cap_pi(sk)->sec_level = sec_level;
+	l2cap_pi(sk)->chan->imtu = l2cap_mtu;
+	l2cap_pi(sk)->chan->sec_level = sec_level;
 	if (l2cap_ertm)
-		l2cap_pi(sk)->mode = L2CAP_MODE_ERTM;
+		l2cap_pi(sk)->chan->mode = L2CAP_MODE_ERTM;
 	release_sock(sk);
 
 	s = rfcomm_session_add(sock, BT_BOUND);
@@ -727,12 +770,12 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
 	addr.l2_family = AF_BLUETOOTH;
 	addr.l2_psm    = cpu_to_le16(RFCOMM_PSM);
 	addr.l2_cid    = 0;
+	addr.l2_bdaddr_type = BDADDR_BREDR;
 	*err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK);
 	if (*err == 0 || *err == -EINPROGRESS)
 		return s;
 
-	rfcomm_session_del(s);
-	return NULL;
+	return rfcomm_session_del(s);
 
 failed:
 	sock_release(sock);
@@ -741,17 +784,16 @@ failed:
 
 void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst)
 {
-	struct sock *sk = s->sock->sk;
+	struct l2cap_chan *chan = l2cap_pi(s->sock->sk)->chan;
 	if (src)
-		bacpy(src, &bt_sk(sk)->src);
+		bacpy(src, &chan->src);
 	if (dst)
-		bacpy(dst, &bt_sk(sk)->dst);
+		bacpy(dst, &chan->dst);
 }
 
 /* ---- RFCOMM frame sending ---- */
 static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len)
 {
-	struct socket *sock = s->sock;
 	struct kvec iv = { data, len };
 	struct msghdr msg;
 
@@ -759,7 +801,14 @@ static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len)
 
 	memset(&msg, 0, sizeof(msg));
 
-	return kernel_sendmsg(sock, &msg, &iv, 1, len);
+	return kernel_sendmsg(s->sock, &msg, &iv, 1, len);
+}
+
+static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd)
+{
+	BT_DBG("%p cmd %u", s, cmd->ctrl);
+
+	return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd));
 }
 
 static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci)
@@ -773,7 +822,7 @@ static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci)
 	cmd.len  = __len8(0);
 	cmd.fcs  = __fcs2((u8 *) &cmd);
 
-	return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+	return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci)
@@ -787,7 +836,7 @@ static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci)
 	cmd.len  = __len8(0);
 	cmd.fcs  = __fcs2((u8 *) &cmd);
 
-	return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+	return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci)
@@ -801,7 +850,7 @@ static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci)
 	cmd.len  = __len8(0);
 	cmd.fcs  = __fcs2((u8 *) &cmd);
 
-	return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+	return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_queue_disc(struct rfcomm_dlc *d)
@@ -837,7 +886,7 @@ static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci)
 	cmd.len  = __len8(0);
 	cmd.fcs  = __fcs2((u8 *) &cmd);
 
-	return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+	return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type)
@@ -1115,7 +1164,7 @@ static void rfcomm_make_uih(struct sk_buff *skb, u8 addr)
 }
 
 /* ---- RFCOMM frame reception ---- */
-static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
+static struct rfcomm_session *rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
 {
 	BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
 
@@ -1124,7 +1173,7 @@ static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
 		struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
 		if (!d) {
 			rfcomm_send_dm(s, dlci);
-			return 0;
+			return s;
 		}
 
 		switch (d->state) {
@@ -1146,6 +1195,7 @@ static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
 			if (list_empty(&s->dlcs)) {
 				s->state = BT_DISCONN;
 				rfcomm_send_disc(s, 0);
+				rfcomm_session_clear_timer(s);
 			}
 
 			break;
@@ -1159,18 +1209,14 @@ static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
 			break;
 
 		case BT_DISCONN:
-			/* When socket is closed and we are not RFCOMM
-			 * initiator rfcomm_process_rx already calls
-			 * rfcomm_session_put() */
-			if (s->sock->sk->sk_state != BT_CLOSED)
-				rfcomm_session_put(s);
+			s = rfcomm_session_close(s, ECONNRESET);
 			break;
 		}
 	}
-	return 0;
+	return s;
 }
 
-static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci)
+static struct rfcomm_session *rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci)
 {
 	int err = 0;
 
@@ -1194,13 +1240,13 @@ static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci)
 		else
 			err = ECONNRESET;
 
-		s->state = BT_CLOSED;
-		rfcomm_session_close(s, err);
+		s = rfcomm_session_close(s, err);
 	}
-	return 0;
+	return s;
 }
 
-static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci)
+static struct rfcomm_session *rfcomm_recv_disc(struct rfcomm_session *s,
+					       u8 dlci)
 {
 	int err = 0;
 
@@ -1229,16 +1275,15 @@ static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci)
 		else
 			err = ECONNRESET;
 
-		s->state = BT_CLOSED;
-		rfcomm_session_close(s, err);
+		s = rfcomm_session_close(s, err);
 	}
-
-	return 0;
+	return s;
 }
 
 void rfcomm_dlc_accept(struct rfcomm_dlc *d)
 {
 	struct sock *sk = d->session->sock->sk;
+	struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn;
 
 	BT_DBG("dlc %p", d);
 
@@ -1252,7 +1297,7 @@ void rfcomm_dlc_accept(struct rfcomm_dlc *d)
 	rfcomm_dlc_unlock(d);
 
 	if (d->role_switch)
-		hci_conn_switch_role(l2cap_pi(sk)->conn->hcon, 0x00);
+		hci_conn_switch_role(conn->hcon, 0x00);
 
 	rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig);
 }
@@ -1653,11 +1698,18 @@ drop:
 	return 0;
 }
 
-static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb)
+static struct rfcomm_session *rfcomm_recv_frame(struct rfcomm_session *s,
+						struct sk_buff *skb)
 {
 	struct rfcomm_hdr *hdr = (void *) skb->data;
 	u8 type, dlci, fcs;
 
+	if (!s) {
+		/* no session, so free socket data */
+		kfree_skb(skb);
+		return s;
+	}
+
 	dlci = __get_dlci(hdr->addr);
 	type = __get_type(hdr->ctrl);
 
@@ -1668,7 +1720,7 @@ static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb)
 	if (__check_fcs(skb->data, type, fcs)) {
 		BT_ERR("bad checksum in packet");
 		kfree_skb(skb);
-		return -EILSEQ;
+		return s;
 	}
 
 	if (__test_ea(hdr->len))
@@ -1684,22 +1736,23 @@ static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb)
 
 	case RFCOMM_DISC:
 		if (__test_pf(hdr->ctrl))
-			rfcomm_recv_disc(s, dlci);
+			s = rfcomm_recv_disc(s, dlci);
 		break;
 
 	case RFCOMM_UA:
 		if (__test_pf(hdr->ctrl))
-			rfcomm_recv_ua(s, dlci);
+			s = rfcomm_recv_ua(s, dlci);
 		break;
 
 	case RFCOMM_DM:
-		rfcomm_recv_dm(s, dlci);
+		s = rfcomm_recv_dm(s, dlci);
 		break;
 
 	case RFCOMM_UIH:
-		if (dlci)
-			return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb);
-
+		if (dlci) {
+			rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb);
+			return s;
+		}
 		rfcomm_recv_mcc(s, skb);
 		break;
 
@@ -1708,7 +1761,7 @@ static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb)
 		break;
 	}
 	kfree_skb(skb);
-	return 0;
+	return s;
 }
 
 /* ---- Connection and data processing ---- */
@@ -1737,7 +1790,7 @@ static void rfcomm_process_connect(struct rfcomm_session *s)
 /* Send data queued for the DLC.
  * Return number of frames left in the queue.
  */
-static inline int rfcomm_process_tx(struct rfcomm_dlc *d)
+static int rfcomm_process_tx(struct rfcomm_dlc *d)
 {
 	struct sk_buff *skb;
 	int err;
@@ -1785,7 +1838,7 @@ static inline int rfcomm_process_tx(struct rfcomm_dlc *d)
 	return skb_queue_len(&d->tx_queue);
 }
 
-static inline void rfcomm_process_dlcs(struct rfcomm_session *s)
+static void rfcomm_process_dlcs(struct rfcomm_session *s)
 {
 	struct rfcomm_dlc *d;
 	struct list_head *p, *n;
@@ -1800,6 +1853,11 @@ static inline void rfcomm_process_dlcs(struct rfcomm_session *s)
 			continue;
 		}
 
+		if (test_bit(RFCOMM_ENC_DROP, &d->flags)) {
+			__rfcomm_dlc_close(d, ECONNREFUSED);
+			continue;
+		}
+
 		if (test_and_clear_bit(RFCOMM_AUTH_ACCEPT, &d->flags)) {
 			rfcomm_dlc_clear_timer(d);
 			if (d->out) {
@@ -1840,7 +1898,7 @@ static inline void rfcomm_process_dlcs(struct rfcomm_session *s)
 	}
 }
 
-static inline void rfcomm_process_rx(struct rfcomm_session *s)
+static struct rfcomm_session *rfcomm_process_rx(struct rfcomm_session *s)
 {
 	struct socket *sock = s->sock;
 	struct sock *sk = sock->sk;
@@ -1851,18 +1909,19 @@ static inline void rfcomm_process_rx(struct rfcomm_session *s)
 	/* Get data directly from socket receive queue without copying it. */
 	while ((skb = skb_dequeue(&sk->sk_receive_queue))) {
 		skb_orphan(skb);
-		rfcomm_recv_frame(s, skb);
+		if (!skb_linearize(skb))
+			s = rfcomm_recv_frame(s, skb);
+		else
+			kfree_skb(skb);
 	}
 
-	if (sk->sk_state == BT_CLOSED) {
-		if (!s->initiator)
-			rfcomm_session_put(s);
+	if (s && (sk->sk_state == BT_CLOSED))
+		s = rfcomm_session_close(s, sk->sk_err);
 
-		rfcomm_session_close(s, sk->sk_err);
-	}
+	return s;
 }
 
-static inline void rfcomm_accept_connection(struct rfcomm_session *s)
+static void rfcomm_accept_connection(struct rfcomm_session *s)
 {
 	struct socket *sock = s->sock, *nsock;
 	int err;
@@ -1884,42 +1943,41 @@ static inline void rfcomm_accept_connection(struct rfcomm_session *s)
 
 	s = rfcomm_session_add(nsock, BT_OPEN);
 	if (s) {
-		rfcomm_session_hold(s);
-
 		/* We should adjust MTU on incoming sessions.
 		 * L2CAP MTU minus UIH header and FCS. */
-		s->mtu = min(l2cap_pi(nsock->sk)->omtu, l2cap_pi(nsock->sk)->imtu) - 5;
+		s->mtu = min(l2cap_pi(nsock->sk)->chan->omtu,
+				l2cap_pi(nsock->sk)->chan->imtu) - 5;
 
 		rfcomm_schedule();
 	} else
 		sock_release(nsock);
 }
 
-static inline void rfcomm_check_connection(struct rfcomm_session *s)
+static struct rfcomm_session *rfcomm_check_connection(struct rfcomm_session *s)
 {
 	struct sock *sk = s->sock->sk;
 
 	BT_DBG("%p state %ld", s, s->state);
 
-	switch(sk->sk_state) {
+	switch (sk->sk_state) {
 	case BT_CONNECTED:
 		s->state = BT_CONNECT;
 
 		/* We can adjust MTU on outgoing sessions.
 		 * L2CAP MTU minus UIH header and FCS. */
-		s->mtu = min(l2cap_pi(sk)->omtu, l2cap_pi(sk)->imtu) - 5;
+		s->mtu = min(l2cap_pi(sk)->chan->omtu, l2cap_pi(sk)->chan->imtu) - 5;
 
 		rfcomm_send_sabm(s, 0);
 		break;
 
 	case BT_CLOSED:
-		s->state = BT_CLOSED;
-		rfcomm_session_close(s, sk->sk_err);
+		s = rfcomm_session_close(s, sk->sk_err);
 		break;
 	}
+	return s;
 }
 
-static inline void rfcomm_process_sessions(void)
+static void rfcomm_process_sessions(void)
 {
 	struct list_head *p, *n;
 
@@ -1932,30 +1990,25 @@ static inline void rfcomm_process_sessions(void)
 		if (test_and_clear_bit(RFCOMM_TIMED_OUT, &s->flags)) {
 			s->state = BT_DISCONN;
 			rfcomm_send_disc(s, 0);
-			rfcomm_session_put(s);
 			continue;
 		}
 
-		if (s->state == BT_LISTEN) {
+		switch (s->state) {
+		case BT_LISTEN:
 			rfcomm_accept_connection(s);
 			continue;
-		}
-
-		rfcomm_session_hold(s);
 
-		switch (s->state) {
 		case BT_BOUND:
-			rfcomm_check_connection(s);
+			s = rfcomm_check_connection(s);
 			break;
 
 		default:
-			rfcomm_process_rx(s);
+			s = rfcomm_process_rx(s);
 			break;
 		}
 
-		rfcomm_process_dlcs(s);
-
-		rfcomm_session_put(s);
+		if (s)
+			rfcomm_process_dlcs(s);
 	}
 
 	rfcomm_unlock();
@@ -1981,6 +2034,7 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 	addr.l2_family = AF_BLUETOOTH;
 	addr.l2_psm    = cpu_to_le16(RFCOMM_PSM);
 	addr.l2_cid    = 0;
+	addr.l2_bdaddr_type = BDADDR_BREDR;
 	err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
 	if (err < 0) {
 		BT_ERR("Bind failed %d", err);
@@ -1990,7 +2044,7 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 	/* Set L2CAP options */
 	sk = sock->sk;
 	lock_sock(sk);
-	l2cap_pi(sk)->imtu = l2cap_mtu;
+	l2cap_pi(sk)->chan->imtu = l2cap_mtu;
 	release_sock(sk);
 
 	/* Start listening on the socket */
@@ -2002,10 +2056,11 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 
 	/* Add listening session */
 	s = rfcomm_session_add(sock, BT_LISTEN);
-	if (!s)
+	if (!s) {
+		err = -ENOMEM;
 		goto failed;
+	}
 
-	rfcomm_session_hold(s);
 	return 0;
 failed:
 	sock_release(sock);
@@ -2033,19 +2088,18 @@ static int rfcomm_run(void *unused)
 
 	rfcomm_add_listener(BDADDR_ANY);
 
-	while (!kthread_should_stop()) {
+	while (1) {
 		set_current_state(TASK_INTERRUPTIBLE);
-		if (!test_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event)) {
-			/* No pending events. Let's sleep.
-			 * Incoming connections and data will wake us up. */
-			schedule();
-		}
-		set_current_state(TASK_RUNNING);
+
+		if (kthread_should_stop())
+			break;
 
 		/* Process stuff */
-		clear_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event);
 		rfcomm_process_sessions();
+
+		schedule();
 	}
+	__set_current_state(TASK_RUNNING);
 
 	rfcomm_kill_listener();
 
@@ -2064,15 +2118,13 @@ static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt)
 	if (!s)
 		return;
 
-	rfcomm_session_hold(s);
-
 	list_for_each_safe(p, n, &s->dlcs) {
 		d = list_entry(p, struct rfcomm_dlc, list);
 
 		if (test_and_clear_bit(RFCOMM_SEC_PENDING, &d->flags)) {
 			rfcomm_dlc_clear_timer(d);
 			if (status || encrypt == 0x00) {
-				__rfcomm_dlc_close(d, ECONNREFUSED);
+				set_bit(RFCOMM_ENC_DROP, &d->flags);
 				continue;
 			}
 		}
@@ -2082,8 +2134,9 @@ static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt)
 				set_bit(RFCOMM_SEC_PENDING, &d->flags);
 				rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT);
 				continue;
-			} else if (d->sec_level == BT_SECURITY_HIGH) {
-				__rfcomm_dlc_close(d, ECONNREFUSED);
+			} else if (d->sec_level == BT_SECURITY_HIGH ||
+				   d->sec_level == BT_SECURITY_FIPS) {
+				set_bit(RFCOMM_ENC_DROP, &d->flags);
 				continue;
 			}
 		}
@@ -2091,14 +2144,12 @@ static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt)
 		if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags))
 			continue;
 
-		if (!status)
+		if (!status && hci_conn_check_secure(conn, d->sec_level))
 			set_bit(RFCOMM_AUTH_ACCEPT, &d->flags);
 		else
 			set_bit(RFCOMM_AUTH_REJECT, &d->flags);
 	}
 
-	rfcomm_session_put(s);
-
 	rfcomm_schedule();
 }
 
@@ -2110,21 +2161,17 @@ static struct hci_cb rfcomm_cb = {
 static int rfcomm_dlc_debugfs_show(struct seq_file *f, void *x)
 {
 	struct rfcomm_session *s;
-	struct list_head *pp, *p;
 
 	rfcomm_lock();
 
-	list_for_each(p, &session_list) {
-		s = list_entry(p, struct rfcomm_session, list);
-		list_for_each(pp, &s->dlcs) {
-			struct sock *sk = s->sock->sk;
-			struct rfcomm_dlc *d = list_entry(pp, struct rfcomm_dlc, list);
-
-			seq_printf(f, "%s %s %ld %d %d %d %d\n",
-						batostr(&bt_sk(sk)->src),
-						batostr(&bt_sk(sk)->dst),
-						d->state, d->dlci, d->mtu,
-						d->rx_credits, d->tx_credits);
+	list_for_each_entry(s, &session_list, list) {
+		struct l2cap_chan *chan = l2cap_pi(s->sock->sk)->chan;
+		struct rfcomm_dlc *d;
+		list_for_each_entry(d, &s->dlcs, list) {
+			seq_printf(f, "%pMR %pMR %ld %d %d %d %d\n",
+				   &chan->src, &chan->dst,
+				   d->state, d->dlci, d->mtu,
+				   d->rx_credits, d->tx_credits);
 		}
 	}
 
@@ -2152,8 +2199,6 @@ static int __init rfcomm_init(void)
 {
 	int err;
 
-	l2cap_load();
-
 	hci_register_cb(&rfcomm_cb);
 
 	rfcomm_thread = kthread_run(rfcomm_run, NULL, "krfcommd");
@@ -2162,13 +2207,6 @@ static int __init rfcomm_init(void)
 		goto unregister;
 	}
 
-	if (bt_debugfs) {
-		rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444,
-				bt_debugfs, NULL, &rfcomm_dlc_debugfs_fops);
-		if (!rfcomm_dlc_debugfs)
-			BT_ERR("Failed to create RFCOMM debug file");
-	}
-
 	err = rfcomm_init_ttys();
 	if (err < 0)
 		goto stop;
@@ -2179,6 +2217,13 @@ static int __init rfcomm_init(void)
 
 	BT_INFO("RFCOMM ver %s", VERSION);
 
+	if (IS_ERR_OR_NULL(bt_debugfs))
+		return 0;
+
+	rfcomm_dlc_debugfs = debugfs_create_file("rfcomm_dlc", 0444,
+						 bt_debugfs, NULL,
+						 &rfcomm_dlc_debugfs_fops);
+
 	return 0;
 
 cleanup: