1 files changed, 766 insertions, 218 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 0b1e460fe44..a7a27bc2c0b 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -24,37 +24,48 @@
 
 /* Bluetooth HCI connection handling. */
 
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/poll.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <net/sock.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/unaligned.h>
+#include <linux/export.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/l2cap.h>
+
+#include "smp.h"
+#include "a2mp.h"
+
+struct sco_param {
+	u16 pkt_type;
+	u16 max_latency;
+};
+
+static const struct sco_param sco_param_cvsd[] = {
+	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a }, /* S3 */
+	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007 }, /* S2 */
+	{ EDR_ESCO_MASK | ESCO_EV3,   0x0007 }, /* S1 */
+	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff }, /* D1 */
+	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff }, /* D0 */
+};
+
+static const struct sco_param sco_param_wideband[] = {
+	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d }, /* T2 */
+	{ EDR_ESCO_MASK | ESCO_EV3,   0x0008 }, /* T1 */
+};
+
+static void hci_le_create_connection_cancel(struct hci_conn *conn)
+{
+	hci_send_cmd(conn->hdev, HCI_OP_LE_CREATE_CONN_CANCEL, 0, NULL);
+}
 
-void hci_acl_connect(struct hci_conn *conn)
+static void hci_acl_create_connection(struct hci_conn *conn)
 {
 	struct hci_dev *hdev = conn->hdev;
 	struct inquiry_entry *ie;
 	struct hci_cp_create_conn cp;
 
-	BT_DBG("%p", conn);
+	BT_DBG("hcon %p", conn);
 
 	conn->state = BT_CONNECT;
-	conn->out = 1;
+	conn->out = true;
 
 	conn->link_mode = HCI_LM_MASTER;
 
@@ -66,16 +77,18 @@ void hci_acl_connect(struct hci_conn *conn)
 	bacpy(&cp.bdaddr, &conn->dst);
 	cp.pscan_rep_mode = 0x02;
 
-	if ((ie = hci_inquiry_cache_lookup(hdev, &conn->dst))) {
+	ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
+	if (ie) {
 		if (inquiry_entry_age(ie) <= INQUIRY_ENTRY_AGE_MAX) {
 			cp.pscan_rep_mode = ie->data.pscan_rep_mode;
 			cp.pscan_mode     = ie->data.pscan_mode;
 			cp.clock_offset   = ie->data.clock_offset |
-							cpu_to_le16(0x8000);
+					    cpu_to_le16(0x8000);
 		}
 
 		memcpy(conn->dev_class, ie->data.dev_class, 3);
-		conn->ssp_mode = ie->data.ssp_mode;
+		if (ie->data.ssp_mode > 0)
+			set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
 	}
 
 	cp.pkt_type = cpu_to_le16(conn->pkt_type);
@@ -87,24 +100,34 @@ void hci_acl_connect(struct hci_conn *conn)
 	hci_send_cmd(hdev, HCI_OP_CREATE_CONN, sizeof(cp), &cp);
 }
 
-static void hci_acl_connect_cancel(struct hci_conn *conn)
+static void hci_acl_create_connection_cancel(struct hci_conn *conn)
 {
 	struct hci_cp_create_conn_cancel cp;
 
-	BT_DBG("%p", conn);
+	BT_DBG("hcon %p", conn);
 
-	if (conn->hdev->hci_ver < 2)
+	if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
 		return;
 
 	bacpy(&cp.bdaddr, &conn->dst);
 	hci_send_cmd(conn->hdev, HCI_OP_CREATE_CONN_CANCEL, sizeof(cp), &cp);
 }
 
-void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
+static void hci_reject_sco(struct hci_conn *conn)
+{
+	struct hci_cp_reject_sync_conn_req cp;
+
+	cp.reason = HCI_ERROR_REMOTE_USER_TERM;
+	bacpy(&cp.bdaddr, &conn->dst);
+
+	hci_send_cmd(conn->hdev, HCI_OP_REJECT_SYNC_CONN_REQ, sizeof(cp), &cp);
+}
+
+void hci_disconnect(struct hci_conn *conn, __u8 reason)
 {
 	struct hci_cp_disconnect cp;
 
-	BT_DBG("%p", conn);
+	BT_DBG("hcon %p", conn);
 
 	conn->state = BT_DISCONN;
 
@@ -113,15 +136,29 @@ void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
 	hci_send_cmd(conn->hdev, HCI_OP_DISCONNECT, sizeof(cp), &cp);
 }
 
-void hci_add_sco(struct hci_conn *conn, __u16 handle)
+static void hci_amp_disconn(struct hci_conn *conn, __u8 reason)
+{
+	struct hci_cp_disconn_phy_link cp;
+
+	BT_DBG("hcon %p", conn);
+
+	conn->state = BT_DISCONN;
+
+	cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
+	cp.reason = reason;
+	hci_send_cmd(conn->hdev, HCI_OP_DISCONN_PHY_LINK,
+		     sizeof(cp), &cp);
+}
+
+static void hci_add_sco(struct hci_conn *conn, __u16 handle)
 {
 	struct hci_dev *hdev = conn->hdev;
 	struct hci_cp_add_sco cp;
 
-	BT_DBG("%p", conn);
+	BT_DBG("hcon %p", conn);
 
 	conn->state = BT_CONNECT;
-	conn->out = 1;
+	conn->out = true;
 
 	conn->attempt++;
 
@@ -131,28 +168,86 @@ void hci_add_sco(struct hci_conn *conn, __u16 handle)
 	hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
 }
 
-void hci_setup_sync(struct hci_conn *conn, __u16 handle)
+bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
 {
 	struct hci_dev *hdev = conn->hdev;
 	struct hci_cp_setup_sync_conn cp;
+	const struct sco_param *param;
 
-	BT_DBG("%p", conn);
+	BT_DBG("hcon %p", conn);
 
 	conn->state = BT_CONNECT;
-	conn->out = 1;
+	conn->out = true;
 
 	conn->attempt++;
 
 	cp.handle   = cpu_to_le16(handle);
-	cp.pkt_type = cpu_to_le16(conn->pkt_type);
 
 	cp.tx_bandwidth   = cpu_to_le32(0x00001f40);
 	cp.rx_bandwidth   = cpu_to_le32(0x00001f40);
-	cp.max_latency    = cpu_to_le16(0xffff);
-	cp.voice_setting  = cpu_to_le16(hdev->voice_setting);
-	cp.retrans_effort = 0xff;
+	cp.voice_setting  = cpu_to_le16(conn->setting);
+
+	switch (conn->setting & SCO_AIRMODE_MASK) {
+	case SCO_AIRMODE_TRANSP:
+		if (conn->attempt > ARRAY_SIZE(sco_param_wideband))
+			return false;
+		cp.retrans_effort = 0x02;
+		param = &sco_param_wideband[conn->attempt - 1];
+		break;
+	case SCO_AIRMODE_CVSD:
+		if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
+			return false;
+		cp.retrans_effort = 0x01;
+		param = &sco_param_cvsd[conn->attempt - 1];
+		break;
+	default:
+		return false;
+	}
+
+	cp.pkt_type = __cpu_to_le16(param->pkt_type);
+	cp.max_latency = __cpu_to_le16(param->max_latency);
+
+	if (hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp) < 0)
+		return false;
 
-	hci_send_cmd(hdev, HCI_OP_SETUP_SYNC_CONN, sizeof(cp), &cp);
+	return true;
+}
+
+void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
+			u16 latency, u16 to_multiplier)
+{
+	struct hci_cp_le_conn_update cp;
+	struct hci_dev *hdev = conn->hdev;
+
+	memset(&cp, 0, sizeof(cp));
+
+	cp.handle		= cpu_to_le16(conn->handle);
+	cp.conn_interval_min	= cpu_to_le16(min);
+	cp.conn_interval_max	= cpu_to_le16(max);
+	cp.conn_latency		= cpu_to_le16(latency);
+	cp.supervision_timeout	= cpu_to_le16(to_multiplier);
+	cp.min_ce_len		= cpu_to_le16(0x0000);
+	cp.max_ce_len		= cpu_to_le16(0x0000);
+
+	hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
+}
+
+void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
+		      __u8 ltk[16])
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_cp_le_start_enc cp;
+
+	BT_DBG("hcon %p", conn);
+
+	memset(&cp, 0, sizeof(cp));
+
+	cp.handle = cpu_to_le16(conn->handle);
+	cp.rand = rand;
+	cp.ediv = ediv;
+	memcpy(cp.ltk, ltk, sizeof(cp.ltk));
+
+	hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
 }
 
 /* Device _must_ be locked */
@@ -160,11 +255,11 @@ void hci_sco_setup(struct hci_conn *conn, __u8 status)
 {
 	struct hci_conn *sco = conn->link;
 
-	BT_DBG("%p", conn);
-
 	if (!sco)
 		return;
 
+	BT_DBG("hcon %p", conn);
+
 	if (!status) {
 		if (lmp_esco_capable(conn->hdev))
 			hci_setup_sync(sco, conn->handle);
@@ -176,71 +271,167 @@ void hci_sco_setup(struct hci_conn *conn, __u8 status)
 	}
 }
 
-static void hci_conn_timeout(unsigned long arg)
+static void hci_conn_disconnect(struct hci_conn *conn)
 {
-	struct hci_conn *conn = (void *) arg;
-	struct hci_dev *hdev = conn->hdev;
-	__u8 reason;
+	__u8 reason = hci_proto_disconn_ind(conn);
 
-	BT_DBG("conn %p state %d", conn, conn->state);
+	switch (conn->type) {
+	case AMP_LINK:
+		hci_amp_disconn(conn, reason);
+		break;
+	default:
+		hci_disconnect(conn, reason);
+		break;
+	}
+}
 
-	if (atomic_read(&conn->refcnt))
+static void hci_conn_timeout(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     disc_work.work);
+	int refcnt = atomic_read(&conn->refcnt);
+
+	BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
+
+	WARN_ON(refcnt < 0);
+
+	/* FIXME: It was observed that in pairing failed scenario, refcnt
+	 * drops below 0. Probably this is because l2cap_conn_del calls
+	 * l2cap_chan_del for each channel, and inside l2cap_chan_del conn is
+	 * dropped. After that loop hci_chan_del is called which also drops
+	 * conn. For now make sure that ACL is alive if refcnt is higher then 0,
+	 * otherwise drop it.
+	 */
+	if (refcnt > 0)
 		return;
 
-	hci_dev_lock(hdev);
-
 	switch (conn->state) {
 	case BT_CONNECT:
 	case BT_CONNECT2:
-		if (conn->type == ACL_LINK && conn->out)
-			hci_acl_connect_cancel(conn);
+		if (conn->out) {
+			if (conn->type == ACL_LINK)
+				hci_acl_create_connection_cancel(conn);
+			else if (conn->type == LE_LINK)
+				hci_le_create_connection_cancel(conn);
+		} else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
+			hci_reject_sco(conn);
+		}
 		break;
 	case BT_CONFIG:
 	case BT_CONNECTED:
-		reason = hci_proto_disconn_ind(conn);
-		hci_acl_disconn(conn, reason);
+		hci_conn_disconnect(conn);
 		break;
 	default:
 		conn->state = BT_CLOSED;
 		break;
 	}
+}
 
-	hci_dev_unlock(hdev);
+/* Enter sniff mode */
+static void hci_conn_idle(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     idle_work.work);
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("hcon %p mode %d", conn, conn->mode);
+
+	if (test_bit(HCI_RAW, &hdev->flags))
+		return;
+
+	if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
+		return;
+
+	if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
+		return;
+
+	if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
+		struct hci_cp_sniff_subrate cp;
+		cp.handle             = cpu_to_le16(conn->handle);
+		cp.max_latency        = cpu_to_le16(0);
+		cp.min_remote_timeout = cpu_to_le16(0);
+		cp.min_local_timeout  = cpu_to_le16(0);
+		hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
+	}
+
+	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
+		struct hci_cp_sniff_mode cp;
+		cp.handle       = cpu_to_le16(conn->handle);
+		cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
+		cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
+		cp.attempt      = cpu_to_le16(4);
+		cp.timeout      = cpu_to_le16(1);
+		hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
+	}
+}
+
+static void hci_conn_auto_accept(struct work_struct *work)
+{
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     auto_accept_work.work);
+
+	hci_send_cmd(conn->hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
+		     &conn->dst);
 }
 
-static void hci_conn_idle(unsigned long arg)
+static void le_conn_timeout(struct work_struct *work)
 {
-	struct hci_conn *conn = (void *) arg;
+	struct hci_conn *conn = container_of(work, struct hci_conn,
+					     le_conn_timeout.work);
+	struct hci_dev *hdev = conn->hdev;
 
-	BT_DBG("conn %p mode %d", conn, conn->mode);
+	BT_DBG("");
+
+	/* We could end up here due to having done directed advertising,
+	 * so clean up the state if necessary. This should however only
+	 * happen with broken hardware or if low duty cycle was used
+	 * (which doesn't have a timeout of its own).
+	 */
+	if (test_bit(HCI_ADVERTISING, &hdev->dev_flags)) {
+		u8 enable = 0x00;
+		hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable),
+			     &enable);
+		hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
+		return;
+	}
 
-	hci_conn_enter_sniff_mode(conn);
+	hci_le_create_connection_cancel(conn);
 }
 
 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
 {
 	struct hci_conn *conn;
 
-	BT_DBG("%s dst %s", hdev->name, batostr(dst));
+	BT_DBG("%s dst %pMR", hdev->name, dst);
 
-	conn = kzalloc(sizeof(struct hci_conn), GFP_ATOMIC);
+	conn = kzalloc(sizeof(struct hci_conn), GFP_KERNEL);
 	if (!conn)
 		return NULL;
 
 	bacpy(&conn->dst, dst);
+	bacpy(&conn->src, &hdev->bdaddr);
 	conn->hdev  = hdev;
 	conn->type  = type;
 	conn->mode  = HCI_CM_ACTIVE;
 	conn->state = BT_OPEN;
 	conn->auth_type = HCI_AT_GENERAL_BONDING;
+	conn->io_capability = hdev->io_capability;
+	conn->remote_auth = 0xff;
+	conn->key_type = 0xff;
+	conn->tx_power = HCI_TX_POWER_INVALID;
+	conn->max_tx_power = HCI_TX_POWER_INVALID;
 
-	conn->power_save = 1;
+	set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
 	conn->disc_timeout = HCI_DISCONN_TIMEOUT;
 
 	switch (type) {
 	case ACL_LINK:
 		conn->pkt_type = hdev->pkt_type & ACL_PTYPE_MASK;
 		break;
+	case LE_LINK:
+		/* conn->src should reflect the local identity address */
+		hci_copy_identity_address(hdev, &conn->src, &conn->src_type);
+		break;
 	case SCO_LINK:
 		if (lmp_esco_capable(hdev))
 			conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
@@ -255,25 +446,23 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
 
 	skb_queue_head_init(&conn->data_q);
 
-	setup_timer(&conn->disc_timer, hci_conn_timeout, (unsigned long)conn);
-	setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
+	INIT_LIST_HEAD(&conn->chan_list);
+
+	INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
+	INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
+	INIT_DELAYED_WORK(&conn->idle_work, hci_conn_idle);
+	INIT_DELAYED_WORK(&conn->le_conn_timeout, le_conn_timeout);
 
 	atomic_set(&conn->refcnt, 0);
 
 	hci_dev_hold(hdev);
 
-	tasklet_disable(&hdev->tx_task);
-
 	hci_conn_hash_add(hdev, conn);
 	if (hdev->notify)
 		hdev->notify(hdev, HCI_NOTIFY_CONN_ADD);
 
-	atomic_set(&conn->devref, 0);
-
 	hci_conn_init_sysfs(conn);
 
-	tasklet_enable(&hdev->tx_task);
-
 	return conn;
 }
 
@@ -281,11 +470,11 @@ int hci_conn_del(struct hci_conn *conn)
 {
 	struct hci_dev *hdev = conn->hdev;
 
-	BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle);
-
-	del_timer(&conn->idle_timer);
+	BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
 
-	del_timer(&conn->disc_timer);
+	cancel_delayed_work_sync(&conn->disc_work);
+	cancel_delayed_work_sync(&conn->auto_accept_work);
+	cancel_delayed_work_sync(&conn->idle_work);
 
 	if (conn->type == ACL_LINK) {
 		struct hci_conn *sco = conn->link;
@@ -294,45 +483,55 @@ int hci_conn_del(struct hci_conn *conn)
 
 		/* Unacked frames */
 		hdev->acl_cnt += conn->sent;
+	} else if (conn->type == LE_LINK) {
+		cancel_delayed_work_sync(&conn->le_conn_timeout);
+
+		if (hdev->le_pkts)
+			hdev->le_cnt += conn->sent;
+		else
+			hdev->acl_cnt += conn->sent;
 	} else {
 		struct hci_conn *acl = conn->link;
 		if (acl) {
 			acl->link = NULL;
-			hci_conn_put(acl);
+			hci_conn_drop(acl);
 		}
 	}
 
-	tasklet_disable(&hdev->tx_task);
+	hci_chan_list_flush(conn);
+
+	if (conn->amp_mgr)
+		amp_mgr_put(conn->amp_mgr);
 
 	hci_conn_hash_del(hdev, conn);
 	if (hdev->notify)
 		hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
 
-	tasklet_enable(&hdev->tx_task);
-
 	skb_queue_purge(&conn->data_q);
 
-	hci_conn_put_device(conn);
+	hci_conn_del_sysfs(conn);
 
 	hci_dev_put(hdev);
 
+	hci_conn_put(conn);
+
 	return 0;
 }
 
 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
 {
 	int use_src = bacmp(src, BDADDR_ANY);
-	struct hci_dev *hdev = NULL;
-	struct list_head *p;
-
-	BT_DBG("%s -> %s", batostr(src), batostr(dst));
+	struct hci_dev *hdev = NULL, *d;
 
-	read_lock_bh(&hci_dev_list_lock);
+	BT_DBG("%pMR -> %pMR", src, dst);
 
-	list_for_each(p, &hci_dev_list) {
-		struct hci_dev *d = list_entry(p, struct hci_dev, list);
+	read_lock(&hci_dev_list_lock);
 
-		if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags))
+	list_for_each_entry(d, &hci_dev_list, list) {
+		if (!test_bit(HCI_UP, &d->flags) ||
+		    test_bit(HCI_RAW, &d->flags) ||
+		    test_bit(HCI_USER_CHANNEL, &d->dev_flags) ||
+		    d->dev_type != HCI_BREDR)
 			continue;
 
 		/* Simple routing:
@@ -354,45 +553,275 @@ struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
 	if (hdev)
 		hdev = hci_dev_hold(hdev);
 
-	read_unlock_bh(&hci_dev_list_lock);
+	read_unlock(&hci_dev_list_lock);
 	return hdev;
 }
 EXPORT_SYMBOL(hci_get_route);
 
-/* Create SCO or ACL connection.
- * Device _must_ be locked */
-struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8 sec_level, __u8 auth_type)
+/* This function requires the caller holds hdev->lock */
+void hci_le_conn_failed(struct hci_conn *conn, u8 status)
+{
+	struct hci_dev *hdev = conn->hdev;
+
+	conn->state = BT_CLOSED;
+
+	mgmt_connect_failed(hdev, &conn->dst, conn->type, conn->dst_type,
+			    status);
+
+	hci_proto_connect_cfm(conn, status);
+
+	hci_conn_del(conn);
+
+	/* Since we may have temporarily stopped the background scanning in
+	 * favor of connection establishment, we should restart it.
+	 */
+	hci_update_background_scan(hdev);
+
+	/* Re-enable advertising in case this was a failed connection
+	 * attempt as a peripheral.
+	 */
+	mgmt_reenable_advertising(hdev);
+}
+
+static void create_le_conn_complete(struct hci_dev *hdev, u8 status)
+{
+	struct hci_conn *conn;
+
+	if (status == 0)
+		return;
+
+	BT_ERR("HCI request failed to create LE connection: status 0x%2.2x",
+	       status);
+
+	hci_dev_lock(hdev);
+
+	conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
+	if (!conn)
+		goto done;
+
+	hci_le_conn_failed(conn, status);
+
+done:
+	hci_dev_unlock(hdev);
+}
+
+static void hci_req_add_le_create_conn(struct hci_request *req,
+				       struct hci_conn *conn)
+{
+	struct hci_cp_le_create_conn cp;
+	struct hci_dev *hdev = conn->hdev;
+	u8 own_addr_type;
+
+	memset(&cp, 0, sizeof(cp));
+
+	/* Update random address, but set require_privacy to false so
+	 * that we never connect with an unresolvable address.
+	 */
+	if (hci_update_random_address(req, false, &own_addr_type))
+		return;
+
+	cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
+	cp.scan_window = cpu_to_le16(hdev->le_scan_window);
+	bacpy(&cp.peer_addr, &conn->dst);
+	cp.peer_addr_type = conn->dst_type;
+	cp.own_address_type = own_addr_type;
+	cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
+	cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
+	cp.supervision_timeout = cpu_to_le16(0x002a);
+	cp.min_ce_len = cpu_to_le16(0x0000);
+	cp.max_ce_len = cpu_to_le16(0x0000);
+
+	hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
+
+	conn->state = BT_CONNECT;
+}
+
+static void hci_req_directed_advertising(struct hci_request *req,
+					 struct hci_conn *conn)
+{
+	struct hci_dev *hdev = req->hdev;
+	struct hci_cp_le_set_adv_param cp;
+	u8 own_addr_type;
+	u8 enable;
+
+	enable = 0x00;
+	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+
+	/* Clear the HCI_ADVERTISING bit temporarily so that the
+	 * hci_update_random_address knows that it's safe to go ahead
+	 * and write a new random address. The flag will be set back on
+	 * as soon as the SET_ADV_ENABLE HCI command completes.
+	 */
+	clear_bit(HCI_ADVERTISING, &hdev->dev_flags);
+
+	/* Set require_privacy to false so that the remote device has a
+	 * chance of identifying us.
+	 */
+	if (hci_update_random_address(req, false, &own_addr_type) < 0)
+		return;
+
+	memset(&cp, 0, sizeof(cp));
+	cp.type = LE_ADV_DIRECT_IND;
+	cp.own_address_type = own_addr_type;
+	cp.direct_addr_type = conn->dst_type;
+	bacpy(&cp.direct_addr, &conn->dst);
+	cp.channel_map = hdev->le_adv_channel_map;
+
+	hci_req_add(req, HCI_OP_LE_SET_ADV_PARAM, sizeof(cp), &cp);
+
+	enable = 0x01;
+	hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+
+	conn->state = BT_CONNECT;
+}
+
+struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
+				u8 dst_type, u8 sec_level, u8 auth_type)
+{
+	struct hci_conn_params *params;
+	struct hci_conn *conn;
+	struct smp_irk *irk;
+	struct hci_request req;
+	int err;
+
+	/* Some devices send ATT messages as soon as the physical link is
+	 * established. To be able to handle these ATT messages, the user-
+	 * space first establishes the connection and then starts the pairing
+	 * process.
+	 *
+	 * So if a hci_conn object already exists for the following connection
+	 * attempt, we simply update pending_sec_level and auth_type fields
+	 * and return the object found.
+	 */
+	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
+	if (conn) {
+		conn->pending_sec_level = sec_level;
+		conn->auth_type = auth_type;
+		goto done;
+	}
+
+	/* Since the controller supports only one LE connection attempt at a
+	 * time, we return -EBUSY if there is any connection attempt running.
+	 */
+	conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
+	if (conn)
+		return ERR_PTR(-EBUSY);
+
+	/* When given an identity address with existing identity
+	 * resolving key, the connection needs to be established
+	 * to a resolvable random address.
+	 *
+	 * This uses the cached random resolvable address from
+	 * a previous scan. When no cached address is available,
+	 * try connecting to the identity address instead.
+	 *
+	 * Storing the resolvable random address is required here
+	 * to handle connection failures. The address will later
+	 * be resolved back into the original identity address
+	 * from the connect request.
+	 */
+	irk = hci_find_irk_by_addr(hdev, dst, dst_type);
+	if (irk && bacmp(&irk->rpa, BDADDR_ANY)) {
+		dst = &irk->rpa;
+		dst_type = ADDR_LE_DEV_RANDOM;
+	}
+
+	conn = hci_conn_add(hdev, LE_LINK, dst);
+	if (!conn)
+		return ERR_PTR(-ENOMEM);
+
+	conn->dst_type = dst_type;
+	conn->sec_level = BT_SECURITY_LOW;
+	conn->pending_sec_level = sec_level;
+	conn->auth_type = auth_type;
+
+	hci_req_init(&req, hdev);
+
+	if (test_bit(HCI_ADVERTISING, &hdev->dev_flags)) {
+		hci_req_directed_advertising(&req, conn);
+		goto create_conn;
+	}
+
+	conn->out = true;
+	conn->link_mode |= HCI_LM_MASTER;
+
+	params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+	if (params) {
+		conn->le_conn_min_interval = params->conn_min_interval;
+		conn->le_conn_max_interval = params->conn_max_interval;
+	} else {
+		conn->le_conn_min_interval = hdev->le_conn_min_interval;
+		conn->le_conn_max_interval = hdev->le_conn_max_interval;
+	}
+
+	/* If controller is scanning, we stop it since some controllers are
+	 * not able to scan and connect at the same time. Also set the
+	 * HCI_LE_SCAN_INTERRUPTED flag so that the command complete
+	 * handler for scan disabling knows to set the correct discovery
+	 * state.
+	 */
+	if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
+		hci_req_add_le_scan_disable(&req);
+		set_bit(HCI_LE_SCAN_INTERRUPTED, &hdev->dev_flags);
+	}
+
+	hci_req_add_le_create_conn(&req, conn);
+
+create_conn:
+	err = hci_req_run(&req, create_le_conn_complete);
+	if (err) {
+		hci_conn_del(conn);
+		return ERR_PTR(err);
+	}
+
+done:
+	hci_conn_hold(conn);
+	return conn;
+}
+
+struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
+				 u8 sec_level, u8 auth_type)
 {
 	struct hci_conn *acl;
-	struct hci_conn *sco;
 
-	BT_DBG("%s dst %s", hdev->name, batostr(dst));
+	if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags))
+		return ERR_PTR(-ENOTSUPP);
 
-	if (!(acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst))) {
-		if (!(acl = hci_conn_add(hdev, ACL_LINK, dst)))
-			return NULL;
+	acl = hci_conn_hash_lookup_ba(hdev, ACL_LINK, dst);
+	if (!acl) {
+		acl = hci_conn_add(hdev, ACL_LINK, dst);
+		if (!acl)
+			return ERR_PTR(-ENOMEM);
 	}
 
 	hci_conn_hold(acl);
 
 	if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
-		acl->sec_level = sec_level;
+		acl->sec_level = BT_SECURITY_LOW;
+		acl->pending_sec_level = sec_level;
 		acl->auth_type = auth_type;
-		hci_acl_connect(acl);
-	} else {
-		if (acl->sec_level < sec_level)
-			acl->sec_level = sec_level;
-		if (acl->auth_type < auth_type)
-			acl->auth_type = auth_type;
+		hci_acl_create_connection(acl);
 	}
 
-	if (type == ACL_LINK)
+	return acl;
+}
+
+struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
+				 __u16 setting)
+{
+	struct hci_conn *acl;
+	struct hci_conn *sco;
+
+	acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING);
+	if (IS_ERR(acl))
 		return acl;
 
-	if (!(sco = hci_conn_hash_lookup_ba(hdev, type, dst))) {
-		if (!(sco = hci_conn_add(hdev, type, dst))) {
-			hci_conn_put(acl);
-			return NULL;
+	sco = hci_conn_hash_lookup_ba(hdev, type, dst);
+	if (!sco) {
+		sco = hci_conn_add(hdev, type, dst);
+		if (!sco) {
+			hci_conn_drop(acl);
+			return ERR_PTR(-ENOMEM);
 		}
 	}
 
@@ -401,14 +830,16 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8
 
 	hci_conn_hold(sco);
 
+	sco->setting = setting;
+
 	if (acl->state == BT_CONNECTED &&
-			(sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
-		acl->power_save = 1;
-		hci_conn_enter_active_mode(acl);
+	    (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
+		set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
+		hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
 
-		if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->pend)) {
+		if (test_bit(HCI_CONN_MODE_CHANGE_PEND, &acl->flags)) {
 			/* defer SCO setup until mode change completed */
-			set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->pend);
+			set_bit(HCI_CONN_SCO_SETUP_PEND, &acl->flags);
 			return sco;
 		}
 
@@ -417,98 +848,189 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst, __u8
 
 	return sco;
 }
-EXPORT_SYMBOL(hci_connect);
 
 /* Check link security requirement */
 int hci_conn_check_link_mode(struct hci_conn *conn)
 {
-	BT_DBG("conn %p", conn);
+	BT_DBG("hcon %p", conn);
+
+	/* In Secure Connections Only mode, it is required that Secure
+	 * Connections is used and the link is encrypted with AES-CCM
+	 * using a P-256 authenticated combination key.
+	 */
+	if (test_bit(HCI_SC_ONLY, &conn->hdev->flags)) {
+		if (!hci_conn_sc_enabled(conn) ||
+		    !test_bit(HCI_CONN_AES_CCM, &conn->flags) ||
+		    conn->key_type != HCI_LK_AUTH_COMBINATION_P256)
+			return 0;
+	}
 
-	if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0 &&
-					!(conn->link_mode & HCI_LM_ENCRYPT))
+	if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
 		return 0;
 
 	return 1;
 }
-EXPORT_SYMBOL(hci_conn_check_link_mode);
 
 /* Authenticate remote device */
 static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
 {
-	BT_DBG("conn %p", conn);
+	BT_DBG("hcon %p", conn);
+
+	if (conn->pending_sec_level > sec_level)
+		sec_level = conn->pending_sec_level;
 
 	if (sec_level > conn->sec_level)
-		conn->sec_level = sec_level;
+		conn->pending_sec_level = sec_level;
 	else if (conn->link_mode & HCI_LM_AUTH)
 		return 1;
 
+	/* Make sure we preserve an existing MITM requirement*/
+	auth_type |= (conn->auth_type & 0x01);
+
 	conn->auth_type = auth_type;
 
-	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
 		struct hci_cp_auth_requested cp;
+
 		cp.handle = cpu_to_le16(conn->handle);
 		hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
-							sizeof(cp), &cp);
+			     sizeof(cp), &cp);
+
+		/* If we're already encrypted set the REAUTH_PEND flag,
+		 * otherwise set the ENCRYPT_PEND.
+		 */
+		if (conn->link_mode & HCI_LM_ENCRYPT)
+			set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
+		else
+			set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
 	}
 
 	return 0;
 }
 
+/* Encrypt the the link */
+static void hci_conn_encrypt(struct hci_conn *conn)
+{
+	BT_DBG("hcon %p", conn);
+
+	if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
+		struct hci_cp_set_conn_encrypt cp;
+		cp.handle  = cpu_to_le16(conn->handle);
+		cp.encrypt = 0x01;
+		hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
+			     &cp);
+	}
+}
+
 /* Enable security */
 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
 {
-	BT_DBG("conn %p", conn);
+	BT_DBG("hcon %p", conn);
 
+	if (conn->type == LE_LINK)
+		return smp_conn_security(conn, sec_level);
+
+	/* For sdp we don't need the link key. */
 	if (sec_level == BT_SECURITY_SDP)
 		return 1;
 
-	if (sec_level == BT_SECURITY_LOW &&
-				(!conn->ssp_mode || !conn->hdev->ssp_mode))
+	/* For non 2.1 devices and low security level we don't need the link
+	   key. */
+	if (sec_level == BT_SECURITY_LOW && !hci_conn_ssp_enabled(conn))
 		return 1;
 
-	if (conn->link_mode & HCI_LM_ENCRYPT)
-		return hci_conn_auth(conn, sec_level, auth_type);
+	/* For other security levels we need the link key. */
+	if (!(conn->link_mode & HCI_LM_AUTH))
+		goto auth;
+
+	/* An authenticated FIPS approved combination key has sufficient
+	 * security for security level 4. */
+	if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256 &&
+	    sec_level == BT_SECURITY_FIPS)
+		goto encrypt;
+
+	/* An authenticated combination key has sufficient security for
+	   security level 3. */
+	if ((conn->key_type == HCI_LK_AUTH_COMBINATION_P192 ||
+	     conn->key_type == HCI_LK_AUTH_COMBINATION_P256) &&
+	    sec_level == BT_SECURITY_HIGH)
+		goto encrypt;
+
+	/* An unauthenticated combination key has sufficient security for
+	   security level 1 and 2. */
+	if ((conn->key_type == HCI_LK_UNAUTH_COMBINATION_P192 ||
+	     conn->key_type == HCI_LK_UNAUTH_COMBINATION_P256) &&
+	    (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
+		goto encrypt;
+
+	/* A combination key has always sufficient security for the security
+	   levels 1 or 2. High security level requires the combination key
+	   is generated using maximum PIN code length (16).
+	   For pre 2.1 units. */
+	if (conn->key_type == HCI_LK_COMBINATION &&
+	    (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW ||
+	     conn->pin_length == 16))
+		goto encrypt;
+
+auth:
+	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
+		return 0;
 
-	if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
+	if (!hci_conn_auth(conn, sec_level, auth_type))
 		return 0;
 
-	if (hci_conn_auth(conn, sec_level, auth_type)) {
-		struct hci_cp_set_conn_encrypt cp;
-		cp.handle  = cpu_to_le16(conn->handle);
-		cp.encrypt = 1;
-		hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT,
-							sizeof(cp), &cp);
-	}
+encrypt:
+	if (conn->link_mode & HCI_LM_ENCRYPT)
+		return 1;
 
+	hci_conn_encrypt(conn);
 	return 0;
 }
 EXPORT_SYMBOL(hci_conn_security);
 
+/* Check secure link requirement */
+int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
+{
+	BT_DBG("hcon %p", conn);
+
+	/* Accept if non-secure or higher security level is required */
+	if (sec_level != BT_SECURITY_HIGH && sec_level != BT_SECURITY_FIPS)
+		return 1;
+
+	/* Accept if secure or higher security level is already present */
+	if (conn->sec_level == BT_SECURITY_HIGH ||
+	    conn->sec_level == BT_SECURITY_FIPS)
+		return 1;
+
+	/* Reject not secure link */
+	return 0;
+}
+EXPORT_SYMBOL(hci_conn_check_secure);
+
 /* Change link key */
 int hci_conn_change_link_key(struct hci_conn *conn)
 {
-	BT_DBG("conn %p", conn);
+	BT_DBG("hcon %p", conn);
 
-	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
+	if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
 		struct hci_cp_change_conn_link_key cp;
 		cp.handle = cpu_to_le16(conn->handle);
 		hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
-							sizeof(cp), &cp);
+			     sizeof(cp), &cp);
 	}
 
 	return 0;
 }
-EXPORT_SYMBOL(hci_conn_change_link_key);
 
 /* Switch role */
 int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
 {
-	BT_DBG("conn %p", conn);
+	BT_DBG("hcon %p", conn);
 
 	if (!role && conn->link_mode & HCI_LM_MASTER)
 		return 1;
 
-	if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->pend)) {
+	if (!test_and_set_bit(HCI_CONN_RSWITCH_PEND, &conn->flags)) {
 		struct hci_cp_switch_role cp;
 		bacpy(&cp.bdaddr, &conn->dst);
 		cp.role = role;
@@ -520,19 +1042,22 @@ int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
 EXPORT_SYMBOL(hci_conn_switch_role);
 
 /* Enter active mode */
-void hci_conn_enter_active_mode(struct hci_conn *conn)
+void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
 {
 	struct hci_dev *hdev = conn->hdev;
 
-	BT_DBG("conn %p mode %d", conn, conn->mode);
+	BT_DBG("hcon %p mode %d", conn, conn->mode);
 
 	if (test_bit(HCI_RAW, &hdev->flags))
 		return;
 
-	if (conn->mode != HCI_CM_SNIFF || !conn->power_save)
+	if (conn->mode != HCI_CM_SNIFF)
+		goto timer;
+
+	if (!test_bit(HCI_CONN_POWER_SAVE, &conn->flags) && !force_active)
 		goto timer;
 
-	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) {
+	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags)) {
 		struct hci_cp_exit_sniff_mode cp;
 		cp.handle = cpu_to_le16(conn->handle);
 		hci_send_cmd(hdev, HCI_OP_EXIT_SNIFF_MODE, sizeof(cp), &cp);
@@ -540,64 +1065,22 @@ void hci_conn_enter_active_mode(struct hci_conn *conn)
 
 timer:
 	if (hdev->idle_timeout > 0)
-		mod_timer(&conn->idle_timer,
-			jiffies + msecs_to_jiffies(hdev->idle_timeout));
-}
-
-/* Enter sniff mode */
-void hci_conn_enter_sniff_mode(struct hci_conn *conn)
-{
-	struct hci_dev *hdev = conn->hdev;
-
-	BT_DBG("conn %p mode %d", conn, conn->mode);
-
-	if (test_bit(HCI_RAW, &hdev->flags))
-		return;
-
-	if (!lmp_sniff_capable(hdev) || !lmp_sniff_capable(conn))
-		return;
-
-	if (conn->mode != HCI_CM_ACTIVE || !(conn->link_policy & HCI_LP_SNIFF))
-		return;
-
-	if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
-		struct hci_cp_sniff_subrate cp;
-		cp.handle             = cpu_to_le16(conn->handle);
-		cp.max_latency        = cpu_to_le16(0);
-		cp.min_remote_timeout = cpu_to_le16(0);
-		cp.min_local_timeout  = cpu_to_le16(0);
-		hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
-	}
-
-	if (!test_and_set_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->pend)) {
-		struct hci_cp_sniff_mode cp;
-		cp.handle       = cpu_to_le16(conn->handle);
-		cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
-		cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
-		cp.attempt      = cpu_to_le16(4);
-		cp.timeout      = cpu_to_le16(1);
-		hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
-	}
+		queue_delayed_work(hdev->workqueue, &conn->idle_work,
+				   msecs_to_jiffies(hdev->idle_timeout));
 }
 
 /* Drop all connection on the device */
 void hci_conn_hash_flush(struct hci_dev *hdev)
 {
 	struct hci_conn_hash *h = &hdev->conn_hash;
-	struct list_head *p;
+	struct hci_conn *c, *n;
 
 	BT_DBG("hdev %s", hdev->name);
 
-	p = h->list.next;
-	while (p != &h->list) {
-		struct hci_conn *c;
-
-		c = list_entry(p, struct hci_conn, list);
-		p = p->next;
-
+	list_for_each_entry_safe(c, n, &h->list, list) {
 		c->state = BT_CLOSED;
 
-		hci_proto_disconn_cfm(c, 0x16);
+		hci_proto_disconn_cfm(c, HCI_ERROR_LOCAL_HOST_TERM);
 		hci_conn_del(c);
 	}
 }
@@ -613,30 +1096,17 @@ void hci_conn_check_pending(struct hci_dev *hdev)
 
 	conn = hci_conn_hash_lookup_state(hdev, ACL_LINK, BT_CONNECT2);
 	if (conn)
-		hci_acl_connect(conn);
+		hci_acl_create_connection(conn);
 
 	hci_dev_unlock(hdev);
 }
 
-void hci_conn_hold_device(struct hci_conn *conn)
-{
-	atomic_inc(&conn->devref);
-}
-EXPORT_SYMBOL(hci_conn_hold_device);
-
-void hci_conn_put_device(struct hci_conn *conn)
-{
-	if (atomic_dec_and_test(&conn->devref))
-		hci_conn_del_sysfs(conn);
-}
-EXPORT_SYMBOL(hci_conn_put_device);
-
 int hci_get_conn_list(void __user *arg)
 {
+	struct hci_conn *c;
 	struct hci_conn_list_req req, *cl;
 	struct hci_conn_info *ci;
 	struct hci_dev *hdev;
-	struct list_head *p;
 	int n = 0, size, err;
 
 	if (copy_from_user(&req, arg, sizeof(req)))
@@ -647,21 +1117,20 @@ int hci_get_conn_list(void __user *arg)
 
 	size = sizeof(req) + req.conn_num * sizeof(*ci);
 
-	if (!(cl = kmalloc(size, GFP_KERNEL)))
+	cl = kmalloc(size, GFP_KERNEL);
+	if (!cl)
 		return -ENOMEM;
 
-	if (!(hdev = hci_dev_get(req.dev_id))) {
+	hdev = hci_dev_get(req.dev_id);
+	if (!hdev) {
 		kfree(cl);
 		return -ENODEV;
 	}
 
 	ci = cl->conn_info;
 
-	hci_dev_lock_bh(hdev);
-	list_for_each(p, &hdev->conn_hash.list) {
-		register struct hci_conn *c;
-		c = list_entry(p, struct hci_conn, list);
-
+	hci_dev_lock(hdev);
+	list_for_each_entry(c, &hdev->conn_hash.list, list) {
 		bacpy(&(ci + n)->bdaddr, &c->dst);
 		(ci + n)->handle = c->handle;
 		(ci + n)->type  = c->type;
@@ -671,7 +1140,7 @@ int hci_get_conn_list(void __user *arg)
 		if (++n >= req.conn_num)
 			break;
 	}
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	cl->dev_id = hdev->id;
 	cl->conn_num = n;
@@ -695,7 +1164,7 @@ int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
 	if (copy_from_user(&req, arg, sizeof(req)))
 		return -EFAULT;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	conn = hci_conn_hash_lookup_ba(hdev, req.type, &req.bdaddr);
 	if (conn) {
 		bacpy(&ci.bdaddr, &conn->dst);
@@ -705,7 +1174,7 @@ int hci_get_conn_info(struct hci_dev *hdev, void __user *arg)
 		ci.state = conn->state;
 		ci.link_mode = conn->link_mode;
 	}
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	if (!conn)
 		return -ENOENT;
@@ -721,14 +1190,93 @@ int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
 	if (copy_from_user(&req, arg, sizeof(req)))
 		return -EFAULT;
 
-	hci_dev_lock_bh(hdev);
+	hci_dev_lock(hdev);
 	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
 	if (conn)
 		req.type = conn->auth_type;
-	hci_dev_unlock_bh(hdev);
+	hci_dev_unlock(hdev);
 
 	if (!conn)
 		return -ENOENT;
 
 	return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
 }
+
+struct hci_chan *hci_chan_create(struct hci_conn *conn)
+{
+	struct hci_dev *hdev = conn->hdev;
+	struct hci_chan *chan;
+
+	BT_DBG("%s hcon %p", hdev->name, conn);
+
+	chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
+	if (!chan)
+		return NULL;
+
+	chan->conn = conn;
+	skb_queue_head_init(&chan->data_q);
+	chan->state = BT_CONNECTED;
+
+	list_add_rcu(&chan->list, &conn->chan_list);
+
+	return chan;
+}
+
+void hci_chan_del(struct hci_chan *chan)
+{
+	struct hci_conn *conn = chan->conn;
+	struct hci_dev *hdev = conn->hdev;
+
+	BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
+
+	list_del_rcu(&chan->list);
+
+	synchronize_rcu();
+
+	hci_conn_drop(conn);
+
+	skb_queue_purge(&chan->data_q);
+	kfree(chan);
+}
+
+void hci_chan_list_flush(struct hci_conn *conn)
+{
+	struct hci_chan *chan, *n;
+
+	BT_DBG("hcon %p", conn);
+
+	list_for_each_entry_safe(chan, n, &conn->chan_list, list)
+		hci_chan_del(chan);
+}
+
+static struct hci_chan *__hci_chan_lookup_handle(struct hci_conn *hcon,
+						 __u16 handle)
+{
+	struct hci_chan *hchan;
+
+	list_for_each_entry(hchan, &hcon->chan_list, list) {
+		if (hchan->handle == handle)
+			return hchan;
+	}
+
+	return NULL;
+}
+
+struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle)
+{
+	struct hci_conn_hash *h = &hdev->conn_hash;
+	struct hci_conn *hcon;
+	struct hci_chan *hchan = NULL;
+
+	rcu_read_lock();
+
+	list_for_each_entry_rcu(hcon, &h->list, list) {
+		hchan = __hci_chan_lookup_handle(hcon, handle);
+		if (hchan)
+			break;
+	}
+
+	rcu_read_unlock();
+
+	return hchan;
+}