/*
   BlueZ - Bluetooth protocol stack for Linux

   Copyright (C) 2010  Nokia Corporation
   Copyright (C) 2011-2012 Intel Corporation

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

/* Bluetooth HCI Management interface */

#include <linux/module.h>
#include <asm/unaligned.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/hci_sock.h>
#include <net/bluetooth/l2cap.h>
#include <net/bluetooth/mgmt.h>

#include "hci_request.h"
#include "smp.h"
#include "mgmt_util.h"
#include "mgmt_config.h"
#include "msft.h"

#define MGMT_VERSION	1
#define MGMT_REVISION	20

static const u16 mgmt_commands[] = {
	MGMT_OP_READ_INDEX_LIST,
	MGMT_OP_READ_INFO,
	MGMT_OP_SET_POWERED,
	MGMT_OP_SET_DISCOVERABLE,
	MGMT_OP_SET_CONNECTABLE,
	MGMT_OP_SET_FAST_CONNECTABLE,
	MGMT_OP_SET_BONDABLE,
	MGMT_OP_SET_LINK_SECURITY,
	MGMT_OP_SET_SSP,
	MGMT_OP_SET_HS,
	MGMT_OP_SET_LE,
	MGMT_OP_SET_DEV_CLASS,
	MGMT_OP_SET_LOCAL_NAME,
	MGMT_OP_ADD_UUID,
	MGMT_OP_REMOVE_UUID,
	MGMT_OP_LOAD_LINK_KEYS,
	MGMT_OP_LOAD_LONG_TERM_KEYS,
	MGMT_OP_DISCONNECT,
	MGMT_OP_GET_CONNECTIONS,
	MGMT_OP_PIN_CODE_REPLY,
	MGMT_OP_PIN_CODE_NEG_REPLY,
	MGMT_OP_SET_IO_CAPABILITY,
	MGMT_OP_PAIR_DEVICE,
	MGMT_OP_CANCEL_PAIR_DEVICE,
	MGMT_OP_UNPAIR_DEVICE,
	MGMT_OP_USER_CONFIRM_REPLY,
	MGMT_OP_USER_CONFIRM_NEG_REPLY,
	MGMT_OP_USER_PASSKEY_REPLY,
	MGMT_OP_USER_PASSKEY_NEG_REPLY,
	MGMT_OP_READ_LOCAL_OOB_DATA,
	MGMT_OP_ADD_REMOTE_OOB_DATA,
	MGMT_OP_REMOVE_REMOTE_OOB_DATA,
	MGMT_OP_START_DISCOVERY,
	MGMT_OP_STOP_DISCOVERY,
	MGMT_OP_CONFIRM_NAME,
	MGMT_OP_BLOCK_DEVICE,
	MGMT_OP_UNBLOCK_DEVICE,
	MGMT_OP_SET_DEVICE_ID,
	MGMT_OP_SET_ADVERTISING,
	MGMT_OP_SET_BREDR,
	MGMT_OP_SET_STATIC_ADDRESS,
	MGMT_OP_SET_SCAN_PARAMS,
	MGMT_OP_SET_SECURE_CONN,
	MGMT_OP_SET_DEBUG_KEYS,
	MGMT_OP_SET_PRIVACY,
	MGMT_OP_LOAD_IRKS,
	MGMT_OP_GET_CONN_INFO,
	MGMT_OP_GET_CLOCK_INFO,
	MGMT_OP_ADD_DEVICE,
	MGMT_OP_REMOVE_DEVICE,
	MGMT_OP_LOAD_CONN_PARAM,
	MGMT_OP_READ_UNCONF_INDEX_LIST,
	MGMT_OP_READ_CONFIG_INFO,
	MGMT_OP_SET_EXTERNAL_CONFIG,
	MGMT_OP_SET_PUBLIC_ADDRESS,
	MGMT_OP_START_SERVICE_DISCOVERY,
	MGMT_OP_READ_LOCAL_OOB_EXT_DATA,
	MGMT_OP_READ_EXT_INDEX_LIST,
	MGMT_OP_READ_ADV_FEATURES,
	MGMT_OP_ADD_ADVERTISING,
	MGMT_OP_REMOVE_ADVERTISING,
	MGMT_OP_GET_ADV_SIZE_INFO,
	MGMT_OP_START_LIMITED_DISCOVERY,
	MGMT_OP_READ_EXT_INFO,
	MGMT_OP_SET_APPEARANCE,
	MGMT_OP_GET_PHY_CONFIGURATION,
	MGMT_OP_SET_PHY_CONFIGURATION,
	MGMT_OP_SET_BLOCKED_KEYS,
	MGMT_OP_SET_WIDEBAND_SPEECH,
	MGMT_OP_READ_CONTROLLER_CAP,
	MGMT_OP_READ_EXP_FEATURES_INFO,
	MGMT_OP_SET_EXP_FEATURE,
	MGMT_OP_READ_DEF_SYSTEM_CONFIG,
	MGMT_OP_SET_DEF_SYSTEM_CONFIG,
	MGMT_OP_READ_DEF_RUNTIME_CONFIG,
	MGMT_OP_SET_DEF_RUNTIME_CONFIG,
	MGMT_OP_GET_DEVICE_FLAGS,
	MGMT_OP_SET_DEVICE_FLAGS,
	MGMT_OP_READ_ADV_MONITOR_FEATURES,
	MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
	MGMT_OP_REMOVE_ADV_MONITOR,
	MGMT_OP_ADD_EXT_ADV_PARAMS,
	MGMT_OP_ADD_EXT_ADV_DATA,
	MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI,
};

static const u16 mgmt_events[] = {
	MGMT_EV_CONTROLLER_ERROR,
	MGMT_EV_INDEX_ADDED,
	MGMT_EV_INDEX_REMOVED,
	MGMT_EV_NEW_SETTINGS,
	MGMT_EV_CLASS_OF_DEV_CHANGED,
	MGMT_EV_LOCAL_NAME_CHANGED,
	MGMT_EV_NEW_LINK_KEY,
	MGMT_EV_NEW_LONG_TERM_KEY,
	MGMT_EV_DEVICE_CONNECTED,
	MGMT_EV_DEVICE_DISCONNECTED,
	MGMT_EV_CONNECT_FAILED,
	MGMT_EV_PIN_CODE_REQUEST,
	MGMT_EV_USER_CONFIRM_REQUEST,
	MGMT_EV_USER_PASSKEY_REQUEST,
	MGMT_EV_AUTH_FAILED,
	MGMT_EV_DEVICE_FOUND,
	MGMT_EV_DISCOVERING,
	MGMT_EV_DEVICE_BLOCKED,
	MGMT_EV_DEVICE_UNBLOCKED,
	MGMT_EV_DEVICE_UNPAIRED,
	MGMT_EV_PASSKEY_NOTIFY,
	MGMT_EV_NEW_IRK,
	MGMT_EV_NEW_CSRK,
	MGMT_EV_DEVICE_ADDED,
	MGMT_EV_DEVICE_REMOVED,
	MGMT_EV_NEW_CONN_PARAM,
	MGMT_EV_UNCONF_INDEX_ADDED,
	MGMT_EV_UNCONF_INDEX_REMOVED,
	MGMT_EV_NEW_CONFIG_OPTIONS,
	MGMT_EV_EXT_INDEX_ADDED,
	MGMT_EV_EXT_INDEX_REMOVED,
	MGMT_EV_LOCAL_OOB_DATA_UPDATED,
	MGMT_EV_ADVERTISING_ADDED,
	MGMT_EV_ADVERTISING_REMOVED,
	MGMT_EV_EXT_INFO_CHANGED,
	MGMT_EV_PHY_CONFIGURATION_CHANGED,
	MGMT_EV_EXP_FEATURE_CHANGED,
	MGMT_EV_DEVICE_FLAGS_CHANGED,
	MGMT_EV_ADV_MONITOR_ADDED,
	MGMT_EV_ADV_MONITOR_REMOVED,
	MGMT_EV_CONTROLLER_SUSPEND,
	MGMT_EV_CONTROLLER_RESUME,
};

static const u16 mgmt_untrusted_commands[] = {
	MGMT_OP_READ_INDEX_LIST,
	MGMT_OP_READ_INFO,
	MGMT_OP_READ_UNCONF_INDEX_LIST,
	MGMT_OP_READ_CONFIG_INFO,
	MGMT_OP_READ_EXT_INDEX_LIST,
	MGMT_OP_READ_EXT_INFO,
	MGMT_OP_READ_CONTROLLER_CAP,
	MGMT_OP_READ_EXP_FEATURES_INFO,
	MGMT_OP_READ_DEF_SYSTEM_CONFIG,
	MGMT_OP_READ_DEF_RUNTIME_CONFIG,
};

static const u16 mgmt_untrusted_events[] = {
	MGMT_EV_INDEX_ADDED,
	MGMT_EV_INDEX_REMOVED,
	MGMT_EV_NEW_SETTINGS,
	MGMT_EV_CLASS_OF_DEV_CHANGED,
	MGMT_EV_LOCAL_NAME_CHANGED,
	MGMT_EV_UNCONF_INDEX_ADDED,
	MGMT_EV_UNCONF_INDEX_REMOVED,
	MGMT_EV_NEW_CONFIG_OPTIONS,
	MGMT_EV_EXT_INDEX_ADDED,
	MGMT_EV_EXT_INDEX_REMOVED,
	MGMT_EV_EXT_INFO_CHANGED,
	MGMT_EV_EXP_FEATURE_CHANGED,
};

#define CACHE_TIMEOUT	msecs_to_jiffies(2 * 1000)

#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
		 "\x00\x00\x00\x00\x00\x00\x00\x00"

/* HCI to MGMT error code conversion table */
static const u8 mgmt_status_table[] = {
	MGMT_STATUS_SUCCESS,
	MGMT_STATUS_UNKNOWN_COMMAND,	/* Unknown Command */
	MGMT_STATUS_NOT_CONNECTED,	/* No Connection */
	MGMT_STATUS_FAILED,		/* Hardware Failure */
	MGMT_STATUS_CONNECT_FAILED,	/* Page Timeout */
	MGMT_STATUS_AUTH_FAILED,	/* Authentication Failed */
	MGMT_STATUS_AUTH_FAILED,	/* PIN or Key Missing */
	MGMT_STATUS_NO_RESOURCES,	/* Memory Full */
	MGMT_STATUS_TIMEOUT,		/* Connection Timeout */
	MGMT_STATUS_NO_RESOURCES,	/* Max Number of Connections */
	MGMT_STATUS_NO_RESOURCES,	/* Max Number of SCO Connections */
	MGMT_STATUS_ALREADY_CONNECTED,	/* ACL Connection Exists */
	MGMT_STATUS_BUSY,		/* Command Disallowed */
	MGMT_STATUS_NO_RESOURCES,	/* Rejected Limited Resources */
	MGMT_STATUS_REJECTED,		/* Rejected Security */
	MGMT_STATUS_REJECTED,		/* Rejected Personal */
	MGMT_STATUS_TIMEOUT,		/* Host Timeout */
	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported Feature */
	MGMT_STATUS_INVALID_PARAMS,	/* Invalid Parameters */
	MGMT_STATUS_DISCONNECTED,	/* OE User Ended Connection */
	MGMT_STATUS_NO_RESOURCES,	/* OE Low Resources */
	MGMT_STATUS_DISCONNECTED,	/* OE Power Off */
	MGMT_STATUS_DISCONNECTED,	/* Connection Terminated */
	MGMT_STATUS_BUSY,		/* Repeated Attempts */
	MGMT_STATUS_REJECTED,		/* Pairing Not Allowed */
	MGMT_STATUS_FAILED,		/* Unknown LMP PDU */
	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported Remote Feature */
	MGMT_STATUS_REJECTED,		/* SCO Offset Rejected */
	MGMT_STATUS_REJECTED,		/* SCO Interval Rejected */
	MGMT_STATUS_REJECTED,		/* Air Mode Rejected */
	MGMT_STATUS_INVALID_PARAMS,	/* Invalid LMP Parameters */
	MGMT_STATUS_FAILED,		/* Unspecified Error */
	MGMT_STATUS_NOT_SUPPORTED,	/* Unsupported LMP Parameter Value */
	MGMT_STATUS_FAILED,		/* Role Change Not Allowed */
	MGMT_STATUS_TIMEOUT,		/* LMP Response Timeout */
	MGMT_STATUS_FAILED,		/* LMP Error Transaction Collision */
	MGMT_STATUS_FAILED,		/* LMP PDU Not Allowed */
	MGMT_STATUS_REJECTED,		/* Encryption Mode Not Accepted */
	MGMT_STATUS_FAILED,		/* Unit Link Key Used */
	MGMT_STATUS_NOT_SUPPORTED,	/* QoS Not Supported */
	MGMT_STATUS_TIMEOUT,		/* Instant Passed */
	MGMT_STATUS_NOT_SUPPORTED,	/* Pairing Not Supported */
	MGMT_STATUS_FAILED,		/* Transaction Collision */
	MGMT_STATUS_INVALID_PARAMS,	/* Unacceptable Parameter */
	MGMT_STATUS_REJECTED,		/* QoS Rejected */
	MGMT_STATUS_NOT_SUPPORTED,	/* Classification Not Supported */
	MGMT_STATUS_REJECTED,		/* Insufficient Security */
	MGMT_STATUS_INVALID_PARAMS,	/* Parameter Out Of Range */
	MGMT_STATUS_BUSY,		/* Role Switch Pending */
	MGMT_STATUS_FAILED,		/* Slot Violation */
	MGMT_STATUS_FAILED,		/* Role Switch Failed */
	MGMT_STATUS_INVALID_PARAMS,	/* EIR Too Large */
	MGMT_STATUS_NOT_SUPPORTED,	/* Simple Pairing Not Supported */
	MGMT_STATUS_BUSY,		/* Host Busy Pairing */
	MGMT_STATUS_REJECTED,		/* Rejected, No Suitable Channel */
	MGMT_STATUS_BUSY,		/* Controller Busy */
	MGMT_STATUS_INVALID_PARAMS,	/* Unsuitable Connection Interval */
	MGMT_STATUS_TIMEOUT,		/* Directed Advertising Timeout */
	MGMT_STATUS_AUTH_FAILED,	/* Terminated Due to MIC Failure */
	MGMT_STATUS_CONNECT_FAILED,	/* Connection Establishment Failed */
	MGMT_STATUS_CONNECT_FAILED,	/* MAC Connection Failed */
};

static u8 mgmt_status(u8 hci_status)
{
	if (hci_status < ARRAY_SIZE(mgmt_status_table))
		return mgmt_status_table[hci_status];

	return MGMT_STATUS_FAILED;
}

static int mgmt_index_event(u16 event, struct hci_dev *hdev, void *data,
			    u16 len, int flag)
{
	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
			       flag, NULL);
}

static int mgmt_limited_event(u16 event, struct hci_dev *hdev, void *data,
			      u16 len, int flag, struct sock *skip_sk)
{
	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
			       flag, skip_sk);
}

static int mgmt_event(u16 event, struct hci_dev *hdev, void *data, u16 len,
		      struct sock *skip_sk)
{
	return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
			       HCI_SOCK_TRUSTED, skip_sk);
}

static u8 le_addr_type(u8 mgmt_addr_type)
{
	if (mgmt_addr_type == BDADDR_LE_PUBLIC)
		return ADDR_LE_DEV_PUBLIC;
	else
		return ADDR_LE_DEV_RANDOM;
}

void mgmt_fill_version_info(void *ver)
{
	struct mgmt_rp_read_version *rp = ver;

	rp->version = MGMT_VERSION;
	rp->revision = cpu_to_le16(MGMT_REVISION);
}

static int read_version(struct sock *sk, struct hci_dev *hdev, void *data,
			u16 data_len)
{
	struct mgmt_rp_read_version rp;

	bt_dev_dbg(hdev, "sock %p", sk);

	mgmt_fill_version_info(&rp);

	return mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_VERSION, 0,
				 &rp, sizeof(rp));
}

static int read_commands(struct sock *sk, struct hci_dev *hdev, void *data,
			 u16 data_len)
{
	struct mgmt_rp_read_commands *rp;
	u16 num_commands, num_events;
	size_t rp_size;
	int i, err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (hci_sock_test_flag(sk, HCI_SOCK_TRUSTED)) {
		num_commands = ARRAY_SIZE(mgmt_commands);
		num_events = ARRAY_SIZE(mgmt_events);
	} else {
		num_commands = ARRAY_SIZE(mgmt_untrusted_commands);
		num_events = ARRAY_SIZE(mgmt_untrusted_events);
	}

	rp_size = sizeof(*rp) + ((num_commands + num_events) * sizeof(u16));

	rp = kmalloc(rp_size, GFP_KERNEL);
	if (!rp)
		return -ENOMEM;

	rp->num_commands = cpu_to_le16(num_commands);
	rp->num_events = cpu_to_le16(num_events);

	if (hci_sock_test_flag(sk, HCI_SOCK_TRUSTED)) {
		__le16 *opcode = rp->opcodes;

		for (i = 0; i < num_commands; i++, opcode++)
			put_unaligned_le16(mgmt_commands[i], opcode);

		for (i = 0; i < num_events; i++, opcode++)
			put_unaligned_le16(mgmt_events[i], opcode);
	} else {
		__le16 *opcode = rp->opcodes;

		for (i = 0; i < num_commands; i++, opcode++)
			put_unaligned_le16(mgmt_untrusted_commands[i], opcode);

		for (i = 0; i < num_events; i++, opcode++)
			put_unaligned_le16(mgmt_untrusted_events[i], opcode);
	}

	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_COMMANDS, 0,
				rp, rp_size);
	kfree(rp);

	return err;
}

static int read_index_list(struct sock *sk, struct hci_dev *hdev, void *data,
			   u16 data_len)
{
	struct mgmt_rp_read_index_list *rp;
	struct hci_dev *d;
	size_t rp_len;
	u16 count;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	read_lock(&hci_dev_list_lock);

	count = 0;
	list_for_each_entry(d, &hci_dev_list, list) {
		if (d->dev_type == HCI_PRIMARY &&
		    !hci_dev_test_flag(d, HCI_UNCONFIGURED))
			count++;
	}

	rp_len = sizeof(*rp) + (2 * count);
	rp = kmalloc(rp_len, GFP_ATOMIC);
	if (!rp) {
		read_unlock(&hci_dev_list_lock);
		return -ENOMEM;
	}

	count = 0;
	list_for_each_entry(d, &hci_dev_list, list) {
		if (hci_dev_test_flag(d, HCI_SETUP) ||
		    hci_dev_test_flag(d, HCI_CONFIG) ||
		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
			continue;

		/* Devices marked as raw-only are neither configured
		 * nor unconfigured controllers.
		 */
		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
			continue;

		if (d->dev_type == HCI_PRIMARY &&
		    !hci_dev_test_flag(d, HCI_UNCONFIGURED)) {
			rp->index[count++] = cpu_to_le16(d->id);
			bt_dev_dbg(hdev, "Added hci%u", d->id);
		}
	}

	rp->num_controllers = cpu_to_le16(count);
	rp_len = sizeof(*rp) + (2 * count);

	read_unlock(&hci_dev_list_lock);

	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE, MGMT_OP_READ_INDEX_LIST,
				0, rp, rp_len);

	kfree(rp);

	return err;
}

static int read_unconf_index_list(struct sock *sk, struct hci_dev *hdev,
				  void *data, u16 data_len)
{
	struct mgmt_rp_read_unconf_index_list *rp;
	struct hci_dev *d;
	size_t rp_len;
	u16 count;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	read_lock(&hci_dev_list_lock);

	count = 0;
	list_for_each_entry(d, &hci_dev_list, list) {
		if (d->dev_type == HCI_PRIMARY &&
		    hci_dev_test_flag(d, HCI_UNCONFIGURED))
			count++;
	}

	rp_len = sizeof(*rp) + (2 * count);
	rp = kmalloc(rp_len, GFP_ATOMIC);
	if (!rp) {
		read_unlock(&hci_dev_list_lock);
		return -ENOMEM;
	}

	count = 0;
	list_for_each_entry(d, &hci_dev_list, list) {
		if (hci_dev_test_flag(d, HCI_SETUP) ||
		    hci_dev_test_flag(d, HCI_CONFIG) ||
		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
			continue;

		/* Devices marked as raw-only are neither configured
		 * nor unconfigured controllers.
		 */
		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
			continue;

		if (d->dev_type == HCI_PRIMARY &&
		    hci_dev_test_flag(d, HCI_UNCONFIGURED)) {
			rp->index[count++] = cpu_to_le16(d->id);
			bt_dev_dbg(hdev, "Added hci%u", d->id);
		}
	}

	rp->num_controllers = cpu_to_le16(count);
	rp_len = sizeof(*rp) + (2 * count);

	read_unlock(&hci_dev_list_lock);

	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
				MGMT_OP_READ_UNCONF_INDEX_LIST, 0, rp, rp_len);

	kfree(rp);

	return err;
}

static int read_ext_index_list(struct sock *sk, struct hci_dev *hdev,
			       void *data, u16 data_len)
{
	struct mgmt_rp_read_ext_index_list *rp;
	struct hci_dev *d;
	u16 count;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	read_lock(&hci_dev_list_lock);

	count = 0;
	list_for_each_entry(d, &hci_dev_list, list) {
		if (d->dev_type == HCI_PRIMARY || d->dev_type == HCI_AMP)
			count++;
	}

	rp = kmalloc(struct_size(rp, entry, count), GFP_ATOMIC);
	if (!rp) {
		read_unlock(&hci_dev_list_lock);
		return -ENOMEM;
	}

	count = 0;
	list_for_each_entry(d, &hci_dev_list, list) {
		if (hci_dev_test_flag(d, HCI_SETUP) ||
		    hci_dev_test_flag(d, HCI_CONFIG) ||
		    hci_dev_test_flag(d, HCI_USER_CHANNEL))
			continue;

		/* Devices marked as raw-only are neither configured
		 * nor unconfigured controllers.
		 */
		if (test_bit(HCI_QUIRK_RAW_DEVICE, &d->quirks))
			continue;

		if (d->dev_type == HCI_PRIMARY) {
			if (hci_dev_test_flag(d, HCI_UNCONFIGURED))
				rp->entry[count].type = 0x01;
			else
				rp->entry[count].type = 0x00;
		} else if (d->dev_type == HCI_AMP) {
			rp->entry[count].type = 0x02;
		} else {
			continue;
		}

		rp->entry[count].bus = d->bus;
		rp->entry[count++].index = cpu_to_le16(d->id);
		bt_dev_dbg(hdev, "Added hci%u", d->id);
	}

	rp->num_controllers = cpu_to_le16(count);

	read_unlock(&hci_dev_list_lock);

	/* If this command is called at least once, then all the
	 * default index and unconfigured index events are disabled
	 * and from now on only extended index events are used.
	 */
	hci_sock_set_flag(sk, HCI_MGMT_EXT_INDEX_EVENTS);
	hci_sock_clear_flag(sk, HCI_MGMT_INDEX_EVENTS);
	hci_sock_clear_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);

	err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
				MGMT_OP_READ_EXT_INDEX_LIST, 0, rp,
				struct_size(rp, entry, count));

	kfree(rp);

	return err;
}

static bool is_configured(struct hci_dev *hdev)
{
	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) &&
	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
		return false;

	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
	    !bacmp(&hdev->public_addr, BDADDR_ANY))
		return false;

	return true;
}

static __le32 get_missing_options(struct hci_dev *hdev)
{
	u32 options = 0;

	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) &&
	    !hci_dev_test_flag(hdev, HCI_EXT_CONFIGURED))
		options |= MGMT_OPTION_EXTERNAL_CONFIG;

	if ((test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks) ||
	     test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) &&
	    !bacmp(&hdev->public_addr, BDADDR_ANY))
		options |= MGMT_OPTION_PUBLIC_ADDRESS;

	return cpu_to_le32(options);
}

static int new_options(struct hci_dev *hdev, struct sock *skip)
{
	__le32 options = get_missing_options(hdev);

	return mgmt_limited_event(MGMT_EV_NEW_CONFIG_OPTIONS, hdev, &options,
				  sizeof(options), HCI_MGMT_OPTION_EVENTS, skip);
}

static int send_options_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)
{
	__le32 options = get_missing_options(hdev);

	return mgmt_cmd_complete(sk, hdev->id, opcode, 0, &options,
				 sizeof(options));
}

static int read_config_info(struct sock *sk, struct hci_dev *hdev,
			    void *data, u16 data_len)
{
	struct mgmt_rp_read_config_info rp;
	u32 options = 0;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	memset(&rp, 0, sizeof(rp));
	rp.manufacturer = cpu_to_le16(hdev->manufacturer);

	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks))
		options |= MGMT_OPTION_EXTERNAL_CONFIG;

	if (hdev->set_bdaddr)
		options |= MGMT_OPTION_PUBLIC_ADDRESS;

	rp.supported_options = cpu_to_le32(options);
	rp.missing_options = get_missing_options(hdev);

	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_CONFIG_INFO, 0,
				 &rp, sizeof(rp));
}

static u32 get_supported_phys(struct hci_dev *hdev)
{
	u32 supported_phys = 0;

	if (lmp_bredr_capable(hdev)) {
		supported_phys |= MGMT_PHY_BR_1M_1SLOT;

		if (hdev->features[0][0] & LMP_3SLOT)
			supported_phys |= MGMT_PHY_BR_1M_3SLOT;

		if (hdev->features[0][0] & LMP_5SLOT)
			supported_phys |= MGMT_PHY_BR_1M_5SLOT;

		if (lmp_edr_2m_capable(hdev)) {
			supported_phys |= MGMT_PHY_EDR_2M_1SLOT;

			if (lmp_edr_3slot_capable(hdev))
				supported_phys |= MGMT_PHY_EDR_2M_3SLOT;

			if (lmp_edr_5slot_capable(hdev))
				supported_phys |= MGMT_PHY_EDR_2M_5SLOT;

			if (lmp_edr_3m_capable(hdev)) {
				supported_phys |= MGMT_PHY_EDR_3M_1SLOT;

				if (lmp_edr_3slot_capable(hdev))
					supported_phys |= MGMT_PHY_EDR_3M_3SLOT;

				if (lmp_edr_5slot_capable(hdev))
					supported_phys |= MGMT_PHY_EDR_3M_5SLOT;
			}
		}
	}

	if (lmp_le_capable(hdev)) {
		supported_phys |= MGMT_PHY_LE_1M_TX;
		supported_phys |= MGMT_PHY_LE_1M_RX;

		if (hdev->le_features[1] & HCI_LE_PHY_2M) {
			supported_phys |= MGMT_PHY_LE_2M_TX;
			supported_phys |= MGMT_PHY_LE_2M_RX;
		}

		if (hdev->le_features[1] & HCI_LE_PHY_CODED) {
			supported_phys |= MGMT_PHY_LE_CODED_TX;
			supported_phys |= MGMT_PHY_LE_CODED_RX;
		}
	}

	return supported_phys;
}

static u32 get_selected_phys(struct hci_dev *hdev)
{
	u32 selected_phys = 0;

	if (lmp_bredr_capable(hdev)) {
		selected_phys |= MGMT_PHY_BR_1M_1SLOT;

		if (hdev->pkt_type & (HCI_DM3 | HCI_DH3))
			selected_phys |= MGMT_PHY_BR_1M_3SLOT;

		if (hdev->pkt_type & (HCI_DM5 | HCI_DH5))
			selected_phys |= MGMT_PHY_BR_1M_5SLOT;

		if (lmp_edr_2m_capable(hdev)) {
			if (!(hdev->pkt_type & HCI_2DH1))
				selected_phys |= MGMT_PHY_EDR_2M_1SLOT;

			if (lmp_edr_3slot_capable(hdev) &&
			    !(hdev->pkt_type & HCI_2DH3))
				selected_phys |= MGMT_PHY_EDR_2M_3SLOT;

			if (lmp_edr_5slot_capable(hdev) &&
			    !(hdev->pkt_type & HCI_2DH5))
				selected_phys |= MGMT_PHY_EDR_2M_5SLOT;

			if (lmp_edr_3m_capable(hdev)) {
				if (!(hdev->pkt_type & HCI_3DH1))
					selected_phys |= MGMT_PHY_EDR_3M_1SLOT;

				if (lmp_edr_3slot_capable(hdev) &&
				    !(hdev->pkt_type & HCI_3DH3))
					selected_phys |= MGMT_PHY_EDR_3M_3SLOT;

				if (lmp_edr_5slot_capable(hdev) &&
				    !(hdev->pkt_type & HCI_3DH5))
					selected_phys |= MGMT_PHY_EDR_3M_5SLOT;
			}
		}
	}

	if (lmp_le_capable(hdev)) {
		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_1M)
			selected_phys |= MGMT_PHY_LE_1M_TX;

		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_1M)
			selected_phys |= MGMT_PHY_LE_1M_RX;

		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_2M)
			selected_phys |= MGMT_PHY_LE_2M_TX;

		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_2M)
			selected_phys |= MGMT_PHY_LE_2M_RX;

		if (hdev->le_tx_def_phys & HCI_LE_SET_PHY_CODED)
			selected_phys |= MGMT_PHY_LE_CODED_TX;

		if (hdev->le_rx_def_phys & HCI_LE_SET_PHY_CODED)
			selected_phys |= MGMT_PHY_LE_CODED_RX;
	}

	return selected_phys;
}

static u32 get_configurable_phys(struct hci_dev *hdev)
{
	return (get_supported_phys(hdev) & ~MGMT_PHY_BR_1M_1SLOT &
		~MGMT_PHY_LE_1M_TX & ~MGMT_PHY_LE_1M_RX);
}

static u32 get_supported_settings(struct hci_dev *hdev)
{
	u32 settings = 0;

	settings |= MGMT_SETTING_POWERED;
	settings |= MGMT_SETTING_BONDABLE;
	settings |= MGMT_SETTING_DEBUG_KEYS;
	settings |= MGMT_SETTING_CONNECTABLE;
	settings |= MGMT_SETTING_DISCOVERABLE;

	if (lmp_bredr_capable(hdev)) {
		if (hdev->hci_ver >= BLUETOOTH_VER_1_2)
			settings |= MGMT_SETTING_FAST_CONNECTABLE;
		settings |= MGMT_SETTING_BREDR;
		settings |= MGMT_SETTING_LINK_SECURITY;

		if (lmp_ssp_capable(hdev)) {
			settings |= MGMT_SETTING_SSP;
			if (IS_ENABLED(CONFIG_BT_HS))
				settings |= MGMT_SETTING_HS;
		}

		if (lmp_sc_capable(hdev))
			settings |= MGMT_SETTING_SECURE_CONN;

		if (test_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
			     &hdev->quirks))
			settings |= MGMT_SETTING_WIDEBAND_SPEECH;
	}

	if (lmp_le_capable(hdev)) {
		settings |= MGMT_SETTING_LE;
		settings |= MGMT_SETTING_SECURE_CONN;
		settings |= MGMT_SETTING_PRIVACY;
		settings |= MGMT_SETTING_STATIC_ADDRESS;

		/* When the experimental feature for LL Privacy support is
		 * enabled, then advertising is no longer supported.
		 */
		if (!hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
			settings |= MGMT_SETTING_ADVERTISING;
	}

	if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
	    hdev->set_bdaddr)
		settings |= MGMT_SETTING_CONFIGURATION;

	settings |= MGMT_SETTING_PHY_CONFIGURATION;

	return settings;
}

static u32 get_current_settings(struct hci_dev *hdev)
{
	u32 settings = 0;

	if (hdev_is_powered(hdev))
		settings |= MGMT_SETTING_POWERED;

	if (hci_dev_test_flag(hdev, HCI_CONNECTABLE))
		settings |= MGMT_SETTING_CONNECTABLE;

	if (hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE))
		settings |= MGMT_SETTING_FAST_CONNECTABLE;

	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
		settings |= MGMT_SETTING_DISCOVERABLE;

	if (hci_dev_test_flag(hdev, HCI_BONDABLE))
		settings |= MGMT_SETTING_BONDABLE;

	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
		settings |= MGMT_SETTING_BREDR;

	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
		settings |= MGMT_SETTING_LE;

	if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY))
		settings |= MGMT_SETTING_LINK_SECURITY;

	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
		settings |= MGMT_SETTING_SSP;

	if (hci_dev_test_flag(hdev, HCI_HS_ENABLED))
		settings |= MGMT_SETTING_HS;

	if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
		settings |= MGMT_SETTING_ADVERTISING;

	if (hci_dev_test_flag(hdev, HCI_SC_ENABLED))
		settings |= MGMT_SETTING_SECURE_CONN;

	if (hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS))
		settings |= MGMT_SETTING_DEBUG_KEYS;

	if (hci_dev_test_flag(hdev, HCI_PRIVACY))
		settings |= MGMT_SETTING_PRIVACY;

	/* The current setting for static address has two purposes. The
	 * first is to indicate if the static address will be used and
	 * the second is to indicate if it is actually set.
	 *
	 * This means if the static address is not configured, this flag
	 * will never be set. If the address is configured, then if the
	 * address is actually used decides if the flag is set or not.
	 *
	 * For single mode LE only controllers and dual-mode controllers
	 * with BR/EDR disabled, the existence of the static address will
	 * be evaluated.
	 */
	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) ||
	    !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
		if (bacmp(&hdev->static_addr, BDADDR_ANY))
			settings |= MGMT_SETTING_STATIC_ADDRESS;
	}

	if (hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED))
		settings |= MGMT_SETTING_WIDEBAND_SPEECH;

	return settings;
}

static struct mgmt_pending_cmd *pending_find(u16 opcode, struct hci_dev *hdev)
{
	return mgmt_pending_find(HCI_CHANNEL_CONTROL, opcode, hdev);
}

static struct mgmt_pending_cmd *pending_find_data(u16 opcode,
						  struct hci_dev *hdev,
						  const void *data)
{
	return mgmt_pending_find_data(HCI_CHANNEL_CONTROL, opcode, hdev, data);
}

u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev)
{
	struct mgmt_pending_cmd *cmd;

	/* If there's a pending mgmt command the flags will not yet have
	 * their final values, so check for this first.
	 */
	cmd = pending_find(MGMT_OP_SET_DISCOVERABLE, hdev);
	if (cmd) {
		struct mgmt_mode *cp = cmd->param;
		if (cp->val == 0x01)
			return LE_AD_GENERAL;
		else if (cp->val == 0x02)
			return LE_AD_LIMITED;
	} else {
		if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
			return LE_AD_LIMITED;
		else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
			return LE_AD_GENERAL;
	}

	return 0;
}

bool mgmt_get_connectable(struct hci_dev *hdev)
{
	struct mgmt_pending_cmd *cmd;

	/* If there's a pending mgmt command the flag will not yet have
	 * it's final value, so check for this first.
	 */
	cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
	if (cmd) {
		struct mgmt_mode *cp = cmd->param;

		return cp->val;
	}

	return hci_dev_test_flag(hdev, HCI_CONNECTABLE);
}

static void service_cache_off(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev,
					    service_cache.work);
	struct hci_request req;

	if (!hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
		return;

	hci_req_init(&req, hdev);

	hci_dev_lock(hdev);

	__hci_req_update_eir(&req);
	__hci_req_update_class(&req);

	hci_dev_unlock(hdev);

	hci_req_run(&req, NULL);
}

static void rpa_expired(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev,
					    rpa_expired.work);
	struct hci_request req;

	bt_dev_dbg(hdev, "");

	hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);

	if (!hci_dev_test_flag(hdev, HCI_ADVERTISING))
		return;

	/* The generation of a new RPA and programming it into the
	 * controller happens in the hci_req_enable_advertising()
	 * function.
	 */
	hci_req_init(&req, hdev);
	if (ext_adv_capable(hdev))
		__hci_req_start_ext_adv(&req, hdev->cur_adv_instance);
	else
		__hci_req_enable_advertising(&req);
	hci_req_run(&req, NULL);
}

static void mgmt_init_hdev(struct sock *sk, struct hci_dev *hdev)
{
	if (hci_dev_test_and_set_flag(hdev, HCI_MGMT))
		return;

	INIT_DELAYED_WORK(&hdev->service_cache, service_cache_off);
	INIT_DELAYED_WORK(&hdev->rpa_expired, rpa_expired);

	/* Non-mgmt controlled devices get this bit set
	 * implicitly so that pairing works for them, however
	 * for mgmt we require user-space to explicitly enable
	 * it
	 */
	hci_dev_clear_flag(hdev, HCI_BONDABLE);
}

static int read_controller_info(struct sock *sk, struct hci_dev *hdev,
				void *data, u16 data_len)
{
	struct mgmt_rp_read_info rp;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	memset(&rp, 0, sizeof(rp));

	bacpy(&rp.bdaddr, &hdev->bdaddr);

	rp.version = hdev->hci_ver;
	rp.manufacturer = cpu_to_le16(hdev->manufacturer);

	rp.supported_settings = cpu_to_le32(get_supported_settings(hdev));
	rp.current_settings = cpu_to_le32(get_current_settings(hdev));

	memcpy(rp.dev_class, hdev->dev_class, 3);

	memcpy(rp.name, hdev->dev_name, sizeof(hdev->dev_name));
	memcpy(rp.short_name, hdev->short_name, sizeof(hdev->short_name));

	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_INFO, 0, &rp,
				 sizeof(rp));
}

static u16 append_eir_data_to_buf(struct hci_dev *hdev, u8 *eir)
{
	u16 eir_len = 0;
	size_t name_len;

	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
		eir_len = eir_append_data(eir, eir_len, EIR_CLASS_OF_DEV,
					  hdev->dev_class, 3);

	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
		eir_len = eir_append_le16(eir, eir_len, EIR_APPEARANCE,
					  hdev->appearance);

	name_len = strlen(hdev->dev_name);
	eir_len = eir_append_data(eir, eir_len, EIR_NAME_COMPLETE,
				  hdev->dev_name, name_len);

	name_len = strlen(hdev->short_name);
	eir_len = eir_append_data(eir, eir_len, EIR_NAME_SHORT,
				  hdev->short_name, name_len);

	return eir_len;
}

static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
				    void *data, u16 data_len)
{
	char buf[512];
	struct mgmt_rp_read_ext_info *rp = (void *)buf;
	u16 eir_len;

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&buf, 0, sizeof(buf));

	hci_dev_lock(hdev);

	bacpy(&rp->bdaddr, &hdev->bdaddr);

	rp->version = hdev->hci_ver;
	rp->manufacturer = cpu_to_le16(hdev->manufacturer);

	rp->supported_settings = cpu_to_le32(get_supported_settings(hdev));
	rp->current_settings = cpu_to_le32(get_current_settings(hdev));


	eir_len = append_eir_data_to_buf(hdev, rp->eir);
	rp->eir_len = cpu_to_le16(eir_len);

	hci_dev_unlock(hdev);

	/* If this command is called at least once, then the events
	 * for class of device and local name changes are disabled
	 * and only the new extended controller information event
	 * is used.
	 */
	hci_sock_set_flag(sk, HCI_MGMT_EXT_INFO_EVENTS);
	hci_sock_clear_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
	hci_sock_clear_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_EXT_INFO, 0, rp,
				 sizeof(*rp) + eir_len);
}

static int ext_info_changed(struct hci_dev *hdev, struct sock *skip)
{
	char buf[512];
	struct mgmt_ev_ext_info_changed *ev = (void *)buf;
	u16 eir_len;

	memset(buf, 0, sizeof(buf));

	eir_len = append_eir_data_to_buf(hdev, ev->eir);
	ev->eir_len = cpu_to_le16(eir_len);

	return mgmt_limited_event(MGMT_EV_EXT_INFO_CHANGED, hdev, ev,
				  sizeof(*ev) + eir_len,
				  HCI_MGMT_EXT_INFO_EVENTS, skip);
}

static int send_settings_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)
{
	__le32 settings = cpu_to_le32(get_current_settings(hdev));

	return mgmt_cmd_complete(sk, hdev->id, opcode, 0, &settings,
				 sizeof(settings));
}

static void clean_up_hci_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	bt_dev_dbg(hdev, "status 0x%02x", status);

	if (hci_conn_count(hdev) == 0) {
		cancel_delayed_work(&hdev->power_off);
		queue_work(hdev->req_workqueue, &hdev->power_off.work);
	}
}

void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev, u8 instance)
{
	struct mgmt_ev_advertising_added ev;

	ev.instance = instance;

	mgmt_event(MGMT_EV_ADVERTISING_ADDED, hdev, &ev, sizeof(ev), sk);
}

void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
			      u8 instance)
{
	struct mgmt_ev_advertising_removed ev;

	ev.instance = instance;

	mgmt_event(MGMT_EV_ADVERTISING_REMOVED, hdev, &ev, sizeof(ev), sk);
}

static void cancel_adv_timeout(struct hci_dev *hdev)
{
	if (hdev->adv_instance_timeout) {
		hdev->adv_instance_timeout = 0;
		cancel_delayed_work(&hdev->adv_instance_expire);
	}
}

static int clean_up_hci_state(struct hci_dev *hdev)
{
	struct hci_request req;
	struct hci_conn *conn;
	bool discov_stopped;
	int err;

	hci_req_init(&req, hdev);

	if (test_bit(HCI_ISCAN, &hdev->flags) ||
	    test_bit(HCI_PSCAN, &hdev->flags)) {
		u8 scan = 0x00;
		hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
	}

	hci_req_clear_adv_instance(hdev, NULL, NULL, 0x00, false);

	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
		__hci_req_disable_advertising(&req);

	discov_stopped = hci_req_stop_discovery(&req);

	list_for_each_entry(conn, &hdev->conn_hash.list, list) {
		/* 0x15 == Terminated due to Power Off */
		__hci_abort_conn(&req, conn, 0x15);
	}

	err = hci_req_run(&req, clean_up_hci_complete);
	if (!err && discov_stopped)
		hci_discovery_set_state(hdev, DISCOVERY_STOPPING);

	return err;
}

static int set_powered(struct sock *sk, struct hci_dev *hdev, void *data,
		       u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (pending_find(MGMT_OP_SET_POWERED, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_POWERED,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	if (!!cp->val == hdev_is_powered(hdev)) {
		err = send_settings_rsp(sk, MGMT_OP_SET_POWERED, hdev);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_POWERED, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	if (cp->val) {
		queue_work(hdev->req_workqueue, &hdev->power_on);
		err = 0;
	} else {
		/* Disconnect connections, stop scans, etc */
		err = clean_up_hci_state(hdev);
		if (!err)
			queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
					   HCI_POWER_OFF_TIMEOUT);

		/* ENODATA means there were no HCI commands queued */
		if (err == -ENODATA) {
			cancel_delayed_work(&hdev->power_off);
			queue_work(hdev->req_workqueue, &hdev->power_off.work);
			err = 0;
		}
	}

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int new_settings(struct hci_dev *hdev, struct sock *skip)
{
	__le32 ev = cpu_to_le32(get_current_settings(hdev));

	return mgmt_limited_event(MGMT_EV_NEW_SETTINGS, hdev, &ev,
				  sizeof(ev), HCI_MGMT_SETTING_EVENTS, skip);
}

int mgmt_new_settings(struct hci_dev *hdev)
{
	return new_settings(hdev, NULL);
}

struct cmd_lookup {
	struct sock *sk;
	struct hci_dev *hdev;
	u8 mgmt_status;
};

static void settings_rsp(struct mgmt_pending_cmd *cmd, void *data)
{
	struct cmd_lookup *match = data;

	send_settings_rsp(cmd->sk, cmd->opcode, match->hdev);

	list_del(&cmd->list);

	if (match->sk == NULL) {
		match->sk = cmd->sk;
		sock_hold(match->sk);
	}

	mgmt_pending_free(cmd);
}

static void cmd_status_rsp(struct mgmt_pending_cmd *cmd, void *data)
{
	u8 *status = data;

	mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, *status);
	mgmt_pending_remove(cmd);
}

static void cmd_complete_rsp(struct mgmt_pending_cmd *cmd, void *data)
{
	if (cmd->cmd_complete) {
		u8 *status = data;

		cmd->cmd_complete(cmd, *status);
		mgmt_pending_remove(cmd);

		return;
	}

	cmd_status_rsp(cmd, data);
}

static int generic_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
{
	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
				 cmd->param, cmd->param_len);
}

static int addr_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
{
	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
				 cmd->param, sizeof(struct mgmt_addr_info));
}

static u8 mgmt_bredr_support(struct hci_dev *hdev)
{
	if (!lmp_bredr_capable(hdev))
		return MGMT_STATUS_NOT_SUPPORTED;
	else if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
		return MGMT_STATUS_REJECTED;
	else
		return MGMT_STATUS_SUCCESS;
}

static u8 mgmt_le_support(struct hci_dev *hdev)
{
	if (!lmp_le_capable(hdev))
		return MGMT_STATUS_NOT_SUPPORTED;
	else if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
		return MGMT_STATUS_REJECTED;
	else
		return MGMT_STATUS_SUCCESS;
}

void mgmt_set_discoverable_complete(struct hci_dev *hdev, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status 0x%02x", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_DISCOVERABLE, hdev);
	if (!cmd)
		goto unlock;

	if (status) {
		u8 mgmt_err = mgmt_status(status);
		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
		goto remove_cmd;
	}

	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
	    hdev->discov_timeout > 0) {
		int to = msecs_to_jiffies(hdev->discov_timeout * 1000);
		queue_delayed_work(hdev->req_workqueue, &hdev->discov_off, to);
	}

	send_settings_rsp(cmd->sk, MGMT_OP_SET_DISCOVERABLE, hdev);
	new_settings(hdev, cmd->sk);

remove_cmd:
	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int set_discoverable(struct sock *sk, struct hci_dev *hdev, void *data,
			    u16 len)
{
	struct mgmt_cp_set_discoverable *cp = data;
	struct mgmt_pending_cmd *cmd;
	u16 timeout;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				       MGMT_STATUS_REJECTED);

	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				       MGMT_STATUS_INVALID_PARAMS);

	timeout = __le16_to_cpu(cp->timeout);

	/* Disabling discoverable requires that no timeout is set,
	 * and enabling limited discoverable requires a timeout.
	 */
	if ((cp->val == 0x00 && timeout > 0) ||
	    (cp->val == 0x02 && timeout == 0))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev) && timeout > 0) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				      MGMT_STATUS_NOT_POWERED);
		goto failed;
	}

	if (pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
	    pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	if (!hci_dev_test_flag(hdev, HCI_CONNECTABLE)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				      MGMT_STATUS_REJECTED);
		goto failed;
	}

	if (hdev->advertising_paused) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DISCOVERABLE,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	if (!hdev_is_powered(hdev)) {
		bool changed = false;

		/* Setting limited discoverable when powered off is
		 * not a valid operation since it requires a timeout
		 * and so no need to check HCI_LIMITED_DISCOVERABLE.
		 */
		if (!!cp->val != hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) {
			hci_dev_change_flag(hdev, HCI_DISCOVERABLE);
			changed = true;
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_DISCOVERABLE, hdev);
		if (err < 0)
			goto failed;

		if (changed)
			err = new_settings(hdev, sk);

		goto failed;
	}

	/* If the current mode is the same, then just update the timeout
	 * value with the new value. And if only the timeout gets updated,
	 * then no need for any HCI transactions.
	 */
	if (!!cp->val == hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
	    (cp->val == 0x02) == hci_dev_test_flag(hdev,
						   HCI_LIMITED_DISCOVERABLE)) {
		cancel_delayed_work(&hdev->discov_off);
		hdev->discov_timeout = timeout;

		if (cp->val && hdev->discov_timeout > 0) {
			int to = msecs_to_jiffies(hdev->discov_timeout * 1000);
			queue_delayed_work(hdev->req_workqueue,
					   &hdev->discov_off, to);
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_DISCOVERABLE, hdev);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	/* Cancel any potential discoverable timeout that might be
	 * still active and store new timeout value. The arming of
	 * the timeout happens in the complete handler.
	 */
	cancel_delayed_work(&hdev->discov_off);
	hdev->discov_timeout = timeout;

	if (cp->val)
		hci_dev_set_flag(hdev, HCI_DISCOVERABLE);
	else
		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);

	/* Limited discoverable mode */
	if (cp->val == 0x02)
		hci_dev_set_flag(hdev, HCI_LIMITED_DISCOVERABLE);
	else
		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);

	queue_work(hdev->req_workqueue, &hdev->discoverable_update);
	err = 0;

failed:
	hci_dev_unlock(hdev);
	return err;
}

void mgmt_set_connectable_complete(struct hci_dev *hdev, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status 0x%02x", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
	if (!cmd)
		goto unlock;

	if (status) {
		u8 mgmt_err = mgmt_status(status);
		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
		goto remove_cmd;
	}

	send_settings_rsp(cmd->sk, MGMT_OP_SET_CONNECTABLE, hdev);
	new_settings(hdev, cmd->sk);

remove_cmd:
	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int set_connectable_update_settings(struct hci_dev *hdev,
					   struct sock *sk, u8 val)
{
	bool changed = false;
	int err;

	if (!!val != hci_dev_test_flag(hdev, HCI_CONNECTABLE))
		changed = true;

	if (val) {
		hci_dev_set_flag(hdev, HCI_CONNECTABLE);
	} else {
		hci_dev_clear_flag(hdev, HCI_CONNECTABLE);
		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
	}

	err = send_settings_rsp(sk, MGMT_OP_SET_CONNECTABLE, hdev);
	if (err < 0)
		return err;

	if (changed) {
		hci_req_update_scan(hdev);
		hci_update_background_scan(hdev);
		return new_settings(hdev, sk);
	}

	return 0;
}

static int set_connectable(struct sock *sk, struct hci_dev *hdev, void *data,
			   u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED) &&
	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
				       MGMT_STATUS_REJECTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = set_connectable_update_settings(hdev, sk, cp->val);
		goto failed;
	}

	if (pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
	    pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_CONNECTABLE,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_CONNECTABLE, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	if (cp->val) {
		hci_dev_set_flag(hdev, HCI_CONNECTABLE);
	} else {
		if (hdev->discov_timeout > 0)
			cancel_delayed_work(&hdev->discov_off);

		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
		hci_dev_clear_flag(hdev, HCI_CONNECTABLE);
	}

	queue_work(hdev->req_workqueue, &hdev->connectable_update);
	err = 0;

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int set_bondable(struct sock *sk, struct hci_dev *hdev, void *data,
			u16 len)
{
	struct mgmt_mode *cp = data;
	bool changed;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BONDABLE,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (cp->val)
		changed = !hci_dev_test_and_set_flag(hdev, HCI_BONDABLE);
	else
		changed = hci_dev_test_and_clear_flag(hdev, HCI_BONDABLE);

	err = send_settings_rsp(sk, MGMT_OP_SET_BONDABLE, hdev);
	if (err < 0)
		goto unlock;

	if (changed) {
		/* In limited privacy mode the change of bondable mode
		 * may affect the local advertising address.
		 */
		if (hdev_is_powered(hdev) &&
		    hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
		    hci_dev_test_flag(hdev, HCI_DISCOVERABLE) &&
		    hci_dev_test_flag(hdev, HCI_LIMITED_PRIVACY))
			queue_work(hdev->req_workqueue,
				   &hdev->discoverable_update);

		err = new_settings(hdev, sk);
	}

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int set_link_security(struct sock *sk, struct hci_dev *hdev, void *data,
			     u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	u8 val, status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	status = mgmt_bredr_support(hdev);
	if (status)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
				       status);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		bool changed = false;

		if (!!cp->val != hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
			hci_dev_change_flag(hdev, HCI_LINK_SECURITY);
			changed = true;
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_LINK_SECURITY, hdev);
		if (err < 0)
			goto failed;

		if (changed)
			err = new_settings(hdev, sk);

		goto failed;
	}

	if (pending_find(MGMT_OP_SET_LINK_SECURITY, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LINK_SECURITY,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	val = !!cp->val;

	if (test_bit(HCI_AUTH, &hdev->flags) == val) {
		err = send_settings_rsp(sk, MGMT_OP_SET_LINK_SECURITY, hdev);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_LINK_SECURITY, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	err = hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, sizeof(val), &val);
	if (err < 0) {
		mgmt_pending_remove(cmd);
		goto failed;
	}

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int set_ssp(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	status = mgmt_bredr_support(hdev);
	if (status)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP, status);

	if (!lmp_ssp_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		bool changed;

		if (cp->val) {
			changed = !hci_dev_test_and_set_flag(hdev,
							     HCI_SSP_ENABLED);
		} else {
			changed = hci_dev_test_and_clear_flag(hdev,
							      HCI_SSP_ENABLED);
			if (!changed)
				changed = hci_dev_test_and_clear_flag(hdev,
								      HCI_HS_ENABLED);
			else
				hci_dev_clear_flag(hdev, HCI_HS_ENABLED);
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev);
		if (err < 0)
			goto failed;

		if (changed)
			err = new_settings(hdev, sk);

		goto failed;
	}

	if (pending_find(MGMT_OP_SET_SSP, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SSP,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	if (!!cp->val == hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
		err = send_settings_rsp(sk, MGMT_OP_SET_SSP, hdev);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_SSP, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	if (!cp->val && hci_dev_test_flag(hdev, HCI_USE_DEBUG_KEYS))
		hci_send_cmd(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
			     sizeof(cp->val), &cp->val);

	err = hci_send_cmd(hdev, HCI_OP_WRITE_SSP_MODE, 1, &cp->val);
	if (err < 0) {
		mgmt_pending_remove(cmd);
		goto failed;
	}

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int set_hs(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	bool changed;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!IS_ENABLED(CONFIG_BT_HS))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
				       MGMT_STATUS_NOT_SUPPORTED);

	status = mgmt_bredr_support(hdev);
	if (status)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS, status);

	if (!lmp_ssp_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (!hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
				       MGMT_STATUS_REJECTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (pending_find(MGMT_OP_SET_SSP, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	if (cp->val) {
		changed = !hci_dev_test_and_set_flag(hdev, HCI_HS_ENABLED);
	} else {
		if (hdev_is_powered(hdev)) {
			err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
					      MGMT_STATUS_REJECTED);
			goto unlock;
		}

		changed = hci_dev_test_and_clear_flag(hdev, HCI_HS_ENABLED);
	}

	err = send_settings_rsp(sk, MGMT_OP_SET_HS, hdev);
	if (err < 0)
		goto unlock;

	if (changed)
		err = new_settings(hdev, sk);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static void le_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct cmd_lookup match = { NULL, hdev };

	hci_dev_lock(hdev);

	if (status) {
		u8 mgmt_err = mgmt_status(status);

		mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, cmd_status_rsp,
				     &mgmt_err);
		goto unlock;
	}

	mgmt_pending_foreach(MGMT_OP_SET_LE, hdev, settings_rsp, &match);

	new_settings(hdev, match.sk);

	if (match.sk)
		sock_put(match.sk);

	/* Make sure the controller has a good default for
	 * advertising data. Restrict the update to when LE
	 * has actually been enabled. During power on, the
	 * update in powered_update_hci will take care of it.
	 */
	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
		struct hci_request req;
		hci_req_init(&req, hdev);
		if (ext_adv_capable(hdev)) {
			int err;

			err = __hci_req_setup_ext_adv_instance(&req, 0x00);
			if (!err)
				__hci_req_update_scan_rsp_data(&req, 0x00);
		} else {
			__hci_req_update_adv_data(&req, 0x00);
			__hci_req_update_scan_rsp_data(&req, 0x00);
		}
		hci_req_run(&req, NULL);
		hci_update_background_scan(hdev);
	}

unlock:
	hci_dev_unlock(hdev);
}

static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	struct hci_cp_write_le_host_supported hci_cp;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	int err;
	u8 val, enabled;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
				       MGMT_STATUS_INVALID_PARAMS);

	/* Bluetooth single mode LE only controllers or dual-mode
	 * controllers configured as LE only devices, do not allow
	 * switching LE off. These have either LE enabled explicitly
	 * or BR/EDR has been previously switched off.
	 *
	 * When trying to enable an already enabled LE, then gracefully
	 * send a positive response. Trying to disable it however will
	 * result into rejection.
	 */
	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
		if (cp->val == 0x01)
			return send_settings_rsp(sk, MGMT_OP_SET_LE, hdev);

		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
				       MGMT_STATUS_REJECTED);
	}

	hci_dev_lock(hdev);

	val = !!cp->val;
	enabled = lmp_host_le_capable(hdev);

	if (!val)
		hci_req_clear_adv_instance(hdev, NULL, NULL, 0x00, true);

	if (!hdev_is_powered(hdev) || val == enabled) {
		bool changed = false;

		if (val != hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
			hci_dev_change_flag(hdev, HCI_LE_ENABLED);
			changed = true;
		}

		if (!val && hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
			hci_dev_clear_flag(hdev, HCI_ADVERTISING);
			changed = true;
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_LE, hdev);
		if (err < 0)
			goto unlock;

		if (changed)
			err = new_settings(hdev, sk);

		goto unlock;
	}

	if (pending_find(MGMT_OP_SET_LE, hdev) ||
	    pending_find(MGMT_OP_SET_ADVERTISING, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_LE,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_LE, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	hci_req_init(&req, hdev);

	memset(&hci_cp, 0, sizeof(hci_cp));

	if (val) {
		hci_cp.le = val;
		hci_cp.simul = 0x00;
	} else {
		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
			__hci_req_disable_advertising(&req);

		if (ext_adv_capable(hdev))
			__hci_req_clear_ext_adv_sets(&req);
	}

	hci_req_add(&req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(hci_cp),
		    &hci_cp);

	err = hci_req_run(&req, le_enable_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

/* This is a helper function to test for pending mgmt commands that can
 * cause CoD or EIR HCI commands. We can only allow one such pending
 * mgmt command at a time since otherwise we cannot easily track what
 * the current values are, will be, and based on that calculate if a new
 * HCI command needs to be sent and if yes with what value.
 */
static bool pending_eir_or_class(struct hci_dev *hdev)
{
	struct mgmt_pending_cmd *cmd;

	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
		switch (cmd->opcode) {
		case MGMT_OP_ADD_UUID:
		case MGMT_OP_REMOVE_UUID:
		case MGMT_OP_SET_DEV_CLASS:
		case MGMT_OP_SET_POWERED:
			return true;
		}
	}

	return false;
}

static const u8 bluetooth_base_uuid[] = {
			0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
			0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

static u8 get_uuid_size(const u8 *uuid)
{
	u32 val;

	if (memcmp(uuid, bluetooth_base_uuid, 12))
		return 128;

	val = get_unaligned_le32(&uuid[12]);
	if (val > 0xffff)
		return 32;

	return 16;
}

static void mgmt_class_complete(struct hci_dev *hdev, u16 mgmt_op, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	hci_dev_lock(hdev);

	cmd = pending_find(mgmt_op, hdev);
	if (!cmd)
		goto unlock;

	mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
			  mgmt_status(status), hdev->dev_class, 3);

	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static void add_uuid_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	bt_dev_dbg(hdev, "status 0x%02x", status);

	mgmt_class_complete(hdev, MGMT_OP_ADD_UUID, status);
}

static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
{
	struct mgmt_cp_add_uuid *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	struct bt_uuid *uuid;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (pending_eir_or_class(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_UUID,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	uuid = kmalloc(sizeof(*uuid), GFP_KERNEL);
	if (!uuid) {
		err = -ENOMEM;
		goto failed;
	}

	memcpy(uuid->uuid, cp->uuid, 16);
	uuid->svc_hint = cp->svc_hint;
	uuid->size = get_uuid_size(cp->uuid);

	list_add_tail(&uuid->list, &hdev->uuids);

	hci_req_init(&req, hdev);

	__hci_req_update_class(&req);
	__hci_req_update_eir(&req);

	err = hci_req_run(&req, add_uuid_complete);
	if (err < 0) {
		if (err != -ENODATA)
			goto failed;

		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_UUID, 0,
					hdev->dev_class, 3);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_ADD_UUID, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	err = 0;

failed:
	hci_dev_unlock(hdev);
	return err;
}

static bool enable_service_cache(struct hci_dev *hdev)
{
	if (!hdev_is_powered(hdev))
		return false;

	if (!hci_dev_test_and_set_flag(hdev, HCI_SERVICE_CACHE)) {
		queue_delayed_work(hdev->workqueue, &hdev->service_cache,
				   CACHE_TIMEOUT);
		return true;
	}

	return false;
}

static void remove_uuid_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	bt_dev_dbg(hdev, "status 0x%02x", status);

	mgmt_class_complete(hdev, MGMT_OP_REMOVE_UUID, status);
}

static int remove_uuid(struct sock *sk, struct hci_dev *hdev, void *data,
		       u16 len)
{
	struct mgmt_cp_remove_uuid *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct bt_uuid *match, *tmp;
	u8 bt_uuid_any[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
	struct hci_request req;
	int err, found;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (pending_eir_or_class(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_UUID,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	if (memcmp(cp->uuid, bt_uuid_any, 16) == 0) {
		hci_uuids_clear(hdev);

		if (enable_service_cache(hdev)) {
			err = mgmt_cmd_complete(sk, hdev->id,
						MGMT_OP_REMOVE_UUID,
						0, hdev->dev_class, 3);
			goto unlock;
		}

		goto update_class;
	}

	found = 0;

	list_for_each_entry_safe(match, tmp, &hdev->uuids, list) {
		if (memcmp(match->uuid, cp->uuid, 16) != 0)
			continue;

		list_del(&match->list);
		kfree(match);
		found++;
	}

	if (found == 0) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_UUID,
				      MGMT_STATUS_INVALID_PARAMS);
		goto unlock;
	}

update_class:
	hci_req_init(&req, hdev);

	__hci_req_update_class(&req);
	__hci_req_update_eir(&req);

	err = hci_req_run(&req, remove_uuid_complete);
	if (err < 0) {
		if (err != -ENODATA)
			goto unlock;

		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_UUID, 0,
					hdev->dev_class, 3);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_REMOVE_UUID, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	err = 0;

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static void set_class_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	bt_dev_dbg(hdev, "status 0x%02x", status);

	mgmt_class_complete(hdev, MGMT_OP_SET_DEV_CLASS, status);
}

static int set_dev_class(struct sock *sk, struct hci_dev *hdev, void *data,
			 u16 len)
{
	struct mgmt_cp_set_dev_class *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_bredr_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
				       MGMT_STATUS_NOT_SUPPORTED);

	hci_dev_lock(hdev);

	if (pending_eir_or_class(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	if ((cp->minor & 0x03) != 0 || (cp->major & 0xe0) != 0) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
				      MGMT_STATUS_INVALID_PARAMS);
		goto unlock;
	}

	hdev->major_class = cp->major;
	hdev->minor_class = cp->minor;

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEV_CLASS, 0,
					hdev->dev_class, 3);
		goto unlock;
	}

	hci_req_init(&req, hdev);

	if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE)) {
		hci_dev_unlock(hdev);
		cancel_delayed_work_sync(&hdev->service_cache);
		hci_dev_lock(hdev);
		__hci_req_update_eir(&req);
	}

	__hci_req_update_class(&req);

	err = hci_req_run(&req, set_class_complete);
	if (err < 0) {
		if (err != -ENODATA)
			goto unlock;

		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEV_CLASS, 0,
					hdev->dev_class, 3);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_DEV_CLASS, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	err = 0;

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int load_link_keys(struct sock *sk, struct hci_dev *hdev, void *data,
			  u16 len)
{
	struct mgmt_cp_load_link_keys *cp = data;
	const u16 max_key_count = ((U16_MAX - sizeof(*cp)) /
				   sizeof(struct mgmt_link_key_info));
	u16 key_count, expected_len;
	bool changed;
	int i;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_bredr_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
				       MGMT_STATUS_NOT_SUPPORTED);

	key_count = __le16_to_cpu(cp->key_count);
	if (key_count > max_key_count) {
		bt_dev_err(hdev, "load_link_keys: too big key_count value %u",
			   key_count);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	expected_len = struct_size(cp, keys, key_count);
	if (expected_len != len) {
		bt_dev_err(hdev, "load_link_keys: expected %u bytes, got %u bytes",
			   expected_len, len);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	if (cp->debug_keys != 0x00 && cp->debug_keys != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);

	bt_dev_dbg(hdev, "debug_keys %u key_count %u", cp->debug_keys,
		   key_count);

	for (i = 0; i < key_count; i++) {
		struct mgmt_link_key_info *key = &cp->keys[i];

		if (key->addr.type != BDADDR_BREDR || key->type > 0x08)
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_LOAD_LINK_KEYS,
					       MGMT_STATUS_INVALID_PARAMS);
	}

	hci_dev_lock(hdev);

	hci_link_keys_clear(hdev);

	if (cp->debug_keys)
		changed = !hci_dev_test_and_set_flag(hdev, HCI_KEEP_DEBUG_KEYS);
	else
		changed = hci_dev_test_and_clear_flag(hdev,
						      HCI_KEEP_DEBUG_KEYS);

	if (changed)
		new_settings(hdev, NULL);

	for (i = 0; i < key_count; i++) {
		struct mgmt_link_key_info *key = &cp->keys[i];

		if (hci_is_blocked_key(hdev,
				       HCI_BLOCKED_KEY_TYPE_LINKKEY,
				       key->val)) {
			bt_dev_warn(hdev, "Skipping blocked link key for %pMR",
				    &key->addr.bdaddr);
			continue;
		}

		/* Always ignore debug keys and require a new pairing if
		 * the user wants to use them.
		 */
		if (key->type == HCI_LK_DEBUG_COMBINATION)
			continue;

		hci_add_link_key(hdev, NULL, &key->addr.bdaddr, key->val,
				 key->type, key->pin_len, NULL);
	}

	mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_LINK_KEYS, 0, NULL, 0);

	hci_dev_unlock(hdev);

	return 0;
}

static int device_unpaired(struct hci_dev *hdev, bdaddr_t *bdaddr,
			   u8 addr_type, struct sock *skip_sk)
{
	struct mgmt_ev_device_unpaired ev;

	bacpy(&ev.addr.bdaddr, bdaddr);
	ev.addr.type = addr_type;

	return mgmt_event(MGMT_EV_DEVICE_UNPAIRED, hdev, &ev, sizeof(ev),
			  skip_sk);
}

static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data,
			 u16 len)
{
	struct mgmt_cp_unpair_device *cp = data;
	struct mgmt_rp_unpair_device rp;
	struct hci_conn_params *params;
	struct mgmt_pending_cmd *cmd;
	struct hci_conn *conn;
	u8 addr_type;
	int err;

	memset(&rp, 0, sizeof(rp));
	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
	rp.addr.type = cp->addr.type;

	if (!bdaddr_type_is_valid(cp->addr.type))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	if (cp->disconnect != 0x00 && cp->disconnect != 0x01)
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
					MGMT_STATUS_NOT_POWERED, &rp,
					sizeof(rp));
		goto unlock;
	}

	if (cp->addr.type == BDADDR_BREDR) {
		/* If disconnection is requested, then look up the
		 * connection. If the remote device is connected, it
		 * will be later used to terminate the link.
		 *
		 * Setting it to NULL explicitly will cause no
		 * termination of the link.
		 */
		if (cp->disconnect)
			conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
						       &cp->addr.bdaddr);
		else
			conn = NULL;

		err = hci_remove_link_key(hdev, &cp->addr.bdaddr);
		if (err < 0) {
			err = mgmt_cmd_complete(sk, hdev->id,
						MGMT_OP_UNPAIR_DEVICE,
						MGMT_STATUS_NOT_PAIRED, &rp,
						sizeof(rp));
			goto unlock;
		}

		goto done;
	}

	/* LE address type */
	addr_type = le_addr_type(cp->addr.type);

	/* Abort any ongoing SMP pairing. Removes ltk and irk if they exist. */
	err = smp_cancel_and_remove_pairing(hdev, &cp->addr.bdaddr, addr_type);
	if (err < 0) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE,
					MGMT_STATUS_NOT_PAIRED, &rp,
					sizeof(rp));
		goto unlock;
	}

	conn = hci_conn_hash_lookup_le(hdev, &cp->addr.bdaddr, addr_type);
	if (!conn) {
		hci_conn_params_del(hdev, &cp->addr.bdaddr, addr_type);
		goto done;
	}


	/* Defer clearing up the connection parameters until closing to
	 * give a chance of keeping them if a repairing happens.
	 */
	set_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags);

	/* Disable auto-connection parameters if present */
	params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr, addr_type);
	if (params) {
		if (params->explicit_connect)
			params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
		else
			params->auto_connect = HCI_AUTO_CONN_DISABLED;
	}

	/* If disconnection is not requested, then clear the connection
	 * variable so that the link is not terminated.
	 */
	if (!cp->disconnect)
		conn = NULL;

done:
	/* If the connection variable is set, then termination of the
	 * link is requested.
	 */
	if (!conn) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNPAIR_DEVICE, 0,
					&rp, sizeof(rp));
		device_unpaired(hdev, &cp->addr.bdaddr, cp->addr.type, sk);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_UNPAIR_DEVICE, hdev, cp,
			       sizeof(*cp));
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	cmd->cmd_complete = addr_cmd_complete;

	err = hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int disconnect(struct sock *sk, struct hci_dev *hdev, void *data,
		      u16 len)
{
	struct mgmt_cp_disconnect *cp = data;
	struct mgmt_rp_disconnect rp;
	struct mgmt_pending_cmd *cmd;
	struct hci_conn *conn;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&rp, 0, sizeof(rp));
	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
	rp.addr.type = cp->addr.type;

	if (!bdaddr_type_is_valid(cp->addr.type))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	hci_dev_lock(hdev);

	if (!test_bit(HCI_UP, &hdev->flags)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
					MGMT_STATUS_NOT_POWERED, &rp,
					sizeof(rp));
		goto failed;
	}

	if (pending_find(MGMT_OP_DISCONNECT, hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
					MGMT_STATUS_BUSY, &rp, sizeof(rp));
		goto failed;
	}

	if (cp->addr.type == BDADDR_BREDR)
		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
					       &cp->addr.bdaddr);
	else
		conn = hci_conn_hash_lookup_le(hdev, &cp->addr.bdaddr,
					       le_addr_type(cp->addr.type));

	if (!conn || conn->state == BT_OPEN || conn->state == BT_CLOSED) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
					MGMT_STATUS_NOT_CONNECTED, &rp,
					sizeof(rp));
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_DISCONNECT, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	cmd->cmd_complete = generic_cmd_complete;

	err = hci_disconnect(conn, HCI_ERROR_REMOTE_USER_TERM);
	if (err < 0)
		mgmt_pending_remove(cmd);

failed:
	hci_dev_unlock(hdev);
	return err;
}

static u8 link_to_bdaddr(u8 link_type, u8 addr_type)
{
	switch (link_type) {
	case LE_LINK:
		switch (addr_type) {
		case ADDR_LE_DEV_PUBLIC:
			return BDADDR_LE_PUBLIC;

		default:
			/* Fallback to LE Random address type */
			return BDADDR_LE_RANDOM;
		}

	default:
		/* Fallback to BR/EDR type */
		return BDADDR_BREDR;
	}
}

static int get_connections(struct sock *sk, struct hci_dev *hdev, void *data,
			   u16 data_len)
{
	struct mgmt_rp_get_connections *rp;
	struct hci_conn *c;
	int err;
	u16 i;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_GET_CONNECTIONS,
				      MGMT_STATUS_NOT_POWERED);
		goto unlock;
	}

	i = 0;
	list_for_each_entry(c, &hdev->conn_hash.list, list) {
		if (test_bit(HCI_CONN_MGMT_CONNECTED, &c->flags))
			i++;
	}

	rp = kmalloc(struct_size(rp, addr, i), GFP_KERNEL);
	if (!rp) {
		err = -ENOMEM;
		goto unlock;
	}

	i = 0;
	list_for_each_entry(c, &hdev->conn_hash.list, list) {
		if (!test_bit(HCI_CONN_MGMT_CONNECTED, &c->flags))
			continue;
		bacpy(&rp->addr[i].bdaddr, &c->dst);
		rp->addr[i].type = link_to_bdaddr(c->type, c->dst_type);
		if (c->type == SCO_LINK || c->type == ESCO_LINK)
			continue;
		i++;
	}

	rp->conn_count = cpu_to_le16(i);

	/* Recalculate length in case of filtered SCO connections, etc */
	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONNECTIONS, 0, rp,
				struct_size(rp, addr, i));

	kfree(rp);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int send_pin_code_neg_reply(struct sock *sk, struct hci_dev *hdev,
				   struct mgmt_cp_pin_code_neg_reply *cp)
{
	struct mgmt_pending_cmd *cmd;
	int err;

	cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_NEG_REPLY, hdev, cp,
			       sizeof(*cp));
	if (!cmd)
		return -ENOMEM;

	cmd->cmd_complete = addr_cmd_complete;

	err = hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
			   sizeof(cp->addr.bdaddr), &cp->addr.bdaddr);
	if (err < 0)
		mgmt_pending_remove(cmd);

	return err;
}

static int pin_code_reply(struct sock *sk, struct hci_dev *hdev, void *data,
			  u16 len)
{
	struct hci_conn *conn;
	struct mgmt_cp_pin_code_reply *cp = data;
	struct hci_cp_pin_code_reply reply;
	struct mgmt_pending_cmd *cmd;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
				      MGMT_STATUS_NOT_POWERED);
		goto failed;
	}

	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->addr.bdaddr);
	if (!conn) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
				      MGMT_STATUS_NOT_CONNECTED);
		goto failed;
	}

	if (conn->pending_sec_level == BT_SECURITY_HIGH && cp->pin_len != 16) {
		struct mgmt_cp_pin_code_neg_reply ncp;

		memcpy(&ncp.addr, &cp->addr, sizeof(ncp.addr));

		bt_dev_err(hdev, "PIN code is not 16 bytes long");

		err = send_pin_code_neg_reply(sk, hdev, &ncp);
		if (err >= 0)
			err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_PIN_CODE_REPLY,
					      MGMT_STATUS_INVALID_PARAMS);

		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_REPLY, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	cmd->cmd_complete = addr_cmd_complete;

	bacpy(&reply.bdaddr, &cp->addr.bdaddr);
	reply.pin_len = cp->pin_len;
	memcpy(reply.pin_code, cp->pin_code, sizeof(reply.pin_code));

	err = hci_send_cmd(hdev, HCI_OP_PIN_CODE_REPLY, sizeof(reply), &reply);
	if (err < 0)
		mgmt_pending_remove(cmd);

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int set_io_capability(struct sock *sk, struct hci_dev *hdev, void *data,
			     u16 len)
{
	struct mgmt_cp_set_io_capability *cp = data;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (cp->io_capability > SMP_IO_KEYBOARD_DISPLAY)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_IO_CAPABILITY,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	hdev->io_capability = cp->io_capability;

	bt_dev_dbg(hdev, "IO capability set to 0x%02x", hdev->io_capability);

	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_IO_CAPABILITY, 0,
				 NULL, 0);
}

static struct mgmt_pending_cmd *find_pairing(struct hci_conn *conn)
{
	struct hci_dev *hdev = conn->hdev;
	struct mgmt_pending_cmd *cmd;

	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
		if (cmd->opcode != MGMT_OP_PAIR_DEVICE)
			continue;

		if (cmd->user_data != conn)
			continue;

		return cmd;
	}

	return NULL;
}

static int pairing_complete(struct mgmt_pending_cmd *cmd, u8 status)
{
	struct mgmt_rp_pair_device rp;
	struct hci_conn *conn = cmd->user_data;
	int err;

	bacpy(&rp.addr.bdaddr, &conn->dst);
	rp.addr.type = link_to_bdaddr(conn->type, conn->dst_type);

	err = mgmt_cmd_complete(cmd->sk, cmd->index, MGMT_OP_PAIR_DEVICE,
				status, &rp, sizeof(rp));

	/* So we don't get further callbacks for this connection */
	conn->connect_cfm_cb = NULL;
	conn->security_cfm_cb = NULL;
	conn->disconn_cfm_cb = NULL;

	hci_conn_drop(conn);

	/* The device is paired so there is no need to remove
	 * its connection parameters anymore.
	 */
	clear_bit(HCI_CONN_PARAM_REMOVAL_PEND, &conn->flags);

	hci_conn_put(conn);

	return err;
}

void mgmt_smp_complete(struct hci_conn *conn, bool complete)
{
	u8 status = complete ? MGMT_STATUS_SUCCESS : MGMT_STATUS_FAILED;
	struct mgmt_pending_cmd *cmd;

	cmd = find_pairing(conn);
	if (cmd) {
		cmd->cmd_complete(cmd, status);
		mgmt_pending_remove(cmd);
	}
}

static void pairing_complete_cb(struct hci_conn *conn, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	BT_DBG("status %u", status);

	cmd = find_pairing(conn);
	if (!cmd) {
		BT_DBG("Unable to find a pending command");
		return;
	}

	cmd->cmd_complete(cmd, mgmt_status(status));
	mgmt_pending_remove(cmd);
}

static void le_pairing_complete_cb(struct hci_conn *conn, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	BT_DBG("status %u", status);

	if (!status)
		return;

	cmd = find_pairing(conn);
	if (!cmd) {
		BT_DBG("Unable to find a pending command");
		return;
	}

	cmd->cmd_complete(cmd, mgmt_status(status));
	mgmt_pending_remove(cmd);
}

static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
		       u16 len)
{
	struct mgmt_cp_pair_device *cp = data;
	struct mgmt_rp_pair_device rp;
	struct mgmt_pending_cmd *cmd;
	u8 sec_level, auth_type;
	struct hci_conn *conn;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&rp, 0, sizeof(rp));
	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
	rp.addr.type = cp->addr.type;

	if (!bdaddr_type_is_valid(cp->addr.type))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	if (cp->io_cap > SMP_IO_KEYBOARD_DISPLAY)
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
					MGMT_STATUS_NOT_POWERED, &rp,
					sizeof(rp));
		goto unlock;
	}

	if (hci_bdaddr_is_paired(hdev, &cp->addr.bdaddr, cp->addr.type)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
					MGMT_STATUS_ALREADY_PAIRED, &rp,
					sizeof(rp));
		goto unlock;
	}

	sec_level = BT_SECURITY_MEDIUM;
	auth_type = HCI_AT_DEDICATED_BONDING;

	if (cp->addr.type == BDADDR_BREDR) {
		conn = hci_connect_acl(hdev, &cp->addr.bdaddr, sec_level,
				       auth_type, CONN_REASON_PAIR_DEVICE);
	} else {
		u8 addr_type = le_addr_type(cp->addr.type);
		struct hci_conn_params *p;

		/* When pairing a new device, it is expected to remember
		 * this device for future connections. Adding the connection
		 * parameter information ahead of time allows tracking
		 * of the slave preferred values and will speed up any
		 * further connection establishment.
		 *
		 * If connection parameters already exist, then they
		 * will be kept and this function does nothing.
		 */
		p = hci_conn_params_add(hdev, &cp->addr.bdaddr, addr_type);

		if (p->auto_connect == HCI_AUTO_CONN_EXPLICIT)
			p->auto_connect = HCI_AUTO_CONN_DISABLED;

		conn = hci_connect_le_scan(hdev, &cp->addr.bdaddr, addr_type,
					   sec_level, HCI_LE_CONN_TIMEOUT,
					   CONN_REASON_PAIR_DEVICE);
	}

	if (IS_ERR(conn)) {
		int status;

		if (PTR_ERR(conn) == -EBUSY)
			status = MGMT_STATUS_BUSY;
		else if (PTR_ERR(conn) == -EOPNOTSUPP)
			status = MGMT_STATUS_NOT_SUPPORTED;
		else if (PTR_ERR(conn) == -ECONNREFUSED)
			status = MGMT_STATUS_REJECTED;
		else
			status = MGMT_STATUS_CONNECT_FAILED;

		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
					status, &rp, sizeof(rp));
		goto unlock;
	}

	if (conn->connect_cfm_cb) {
		hci_conn_drop(conn);
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_PAIR_DEVICE,
					MGMT_STATUS_BUSY, &rp, sizeof(rp));
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_PAIR_DEVICE, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		hci_conn_drop(conn);
		goto unlock;
	}

	cmd->cmd_complete = pairing_complete;

	/* For LE, just connecting isn't a proof that the pairing finished */
	if (cp->addr.type == BDADDR_BREDR) {
		conn->connect_cfm_cb = pairing_complete_cb;
		conn->security_cfm_cb = pairing_complete_cb;
		conn->disconn_cfm_cb = pairing_complete_cb;
	} else {
		conn->connect_cfm_cb = le_pairing_complete_cb;
		conn->security_cfm_cb = le_pairing_complete_cb;
		conn->disconn_cfm_cb = le_pairing_complete_cb;
	}

	conn->io_capability = cp->io_cap;
	cmd->user_data = hci_conn_get(conn);

	if ((conn->state == BT_CONNECTED || conn->state == BT_CONFIG) &&
	    hci_conn_security(conn, sec_level, auth_type, true)) {
		cmd->cmd_complete(cmd, 0);
		mgmt_pending_remove(cmd);
	}

	err = 0;

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int cancel_pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
			      u16 len)
{
	struct mgmt_addr_info *addr = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_conn *conn;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
				      MGMT_STATUS_NOT_POWERED);
		goto unlock;
	}

	cmd = pending_find(MGMT_OP_PAIR_DEVICE, hdev);
	if (!cmd) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
				      MGMT_STATUS_INVALID_PARAMS);
		goto unlock;
	}

	conn = cmd->user_data;

	if (bacmp(&addr->bdaddr, &conn->dst) != 0) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE,
				      MGMT_STATUS_INVALID_PARAMS);
		goto unlock;
	}

	cmd->cmd_complete(cmd, MGMT_STATUS_CANCELLED);
	mgmt_pending_remove(cmd);

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CANCEL_PAIR_DEVICE, 0,
				addr, sizeof(*addr));

	/* Since user doesn't want to proceed with the connection, abort any
	 * ongoing pairing and then terminate the link if it was created
	 * because of the pair device action.
	 */
	if (addr->type == BDADDR_BREDR)
		hci_remove_link_key(hdev, &addr->bdaddr);
	else
		smp_cancel_and_remove_pairing(hdev, &addr->bdaddr,
					      le_addr_type(addr->type));

	if (conn->conn_reason == CONN_REASON_PAIR_DEVICE)
		hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int user_pairing_resp(struct sock *sk, struct hci_dev *hdev,
			     struct mgmt_addr_info *addr, u16 mgmt_op,
			     u16 hci_op, __le32 passkey)
{
	struct mgmt_pending_cmd *cmd;
	struct hci_conn *conn;
	int err;

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
					MGMT_STATUS_NOT_POWERED, addr,
					sizeof(*addr));
		goto done;
	}

	if (addr->type == BDADDR_BREDR)
		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &addr->bdaddr);
	else
		conn = hci_conn_hash_lookup_le(hdev, &addr->bdaddr,
					       le_addr_type(addr->type));

	if (!conn) {
		err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
					MGMT_STATUS_NOT_CONNECTED, addr,
					sizeof(*addr));
		goto done;
	}

	if (addr->type == BDADDR_LE_PUBLIC || addr->type == BDADDR_LE_RANDOM) {
		err = smp_user_confirm_reply(conn, mgmt_op, passkey);
		if (!err)
			err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
						MGMT_STATUS_SUCCESS, addr,
						sizeof(*addr));
		else
			err = mgmt_cmd_complete(sk, hdev->id, mgmt_op,
						MGMT_STATUS_FAILED, addr,
						sizeof(*addr));

		goto done;
	}

	cmd = mgmt_pending_add(sk, mgmt_op, hdev, addr, sizeof(*addr));
	if (!cmd) {
		err = -ENOMEM;
		goto done;
	}

	cmd->cmd_complete = addr_cmd_complete;

	/* Continue with pairing via HCI */
	if (hci_op == HCI_OP_USER_PASSKEY_REPLY) {
		struct hci_cp_user_passkey_reply cp;

		bacpy(&cp.bdaddr, &addr->bdaddr);
		cp.passkey = passkey;
		err = hci_send_cmd(hdev, hci_op, sizeof(cp), &cp);
	} else
		err = hci_send_cmd(hdev, hci_op, sizeof(addr->bdaddr),
				   &addr->bdaddr);

	if (err < 0)
		mgmt_pending_remove(cmd);

done:
	hci_dev_unlock(hdev);
	return err;
}

static int pin_code_neg_reply(struct sock *sk, struct hci_dev *hdev,
			      void *data, u16 len)
{
	struct mgmt_cp_pin_code_neg_reply *cp = data;

	bt_dev_dbg(hdev, "sock %p", sk);

	return user_pairing_resp(sk, hdev, &cp->addr,
				MGMT_OP_PIN_CODE_NEG_REPLY,
				HCI_OP_PIN_CODE_NEG_REPLY, 0);
}

static int user_confirm_reply(struct sock *sk, struct hci_dev *hdev, void *data,
			      u16 len)
{
	struct mgmt_cp_user_confirm_reply *cp = data;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (len != sizeof(*cp))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_USER_CONFIRM_REPLY,
				       MGMT_STATUS_INVALID_PARAMS);

	return user_pairing_resp(sk, hdev, &cp->addr,
				 MGMT_OP_USER_CONFIRM_REPLY,
				 HCI_OP_USER_CONFIRM_REPLY, 0);
}

static int user_confirm_neg_reply(struct sock *sk, struct hci_dev *hdev,
				  void *data, u16 len)
{
	struct mgmt_cp_user_confirm_neg_reply *cp = data;

	bt_dev_dbg(hdev, "sock %p", sk);

	return user_pairing_resp(sk, hdev, &cp->addr,
				 MGMT_OP_USER_CONFIRM_NEG_REPLY,
				 HCI_OP_USER_CONFIRM_NEG_REPLY, 0);
}

static int user_passkey_reply(struct sock *sk, struct hci_dev *hdev, void *data,
			      u16 len)
{
	struct mgmt_cp_user_passkey_reply *cp = data;

	bt_dev_dbg(hdev, "sock %p", sk);

	return user_pairing_resp(sk, hdev, &cp->addr,
				 MGMT_OP_USER_PASSKEY_REPLY,
				 HCI_OP_USER_PASSKEY_REPLY, cp->passkey);
}

static int user_passkey_neg_reply(struct sock *sk, struct hci_dev *hdev,
				  void *data, u16 len)
{
	struct mgmt_cp_user_passkey_neg_reply *cp = data;

	bt_dev_dbg(hdev, "sock %p", sk);

	return user_pairing_resp(sk, hdev, &cp->addr,
				 MGMT_OP_USER_PASSKEY_NEG_REPLY,
				 HCI_OP_USER_PASSKEY_NEG_REPLY, 0);
}

static void adv_expire(struct hci_dev *hdev, u32 flags)
{
	struct adv_info *adv_instance;
	struct hci_request req;
	int err;

	adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
	if (!adv_instance)
		return;

	/* stop if current instance doesn't need to be changed */
	if (!(adv_instance->flags & flags))
		return;

	cancel_adv_timeout(hdev);

	adv_instance = hci_get_next_instance(hdev, adv_instance->instance);
	if (!adv_instance)
		return;

	hci_req_init(&req, hdev);
	err = __hci_req_schedule_adv_instance(&req, adv_instance->instance,
					      true);
	if (err)
		return;

	hci_req_run(&req, NULL);
}

static void set_name_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct mgmt_cp_set_local_name *cp;
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status 0x%02x", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_LOCAL_NAME, hdev);
	if (!cmd)
		goto unlock;

	cp = cmd->param;

	if (status) {
		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_SET_LOCAL_NAME,
			        mgmt_status(status));
	} else {
		mgmt_cmd_complete(cmd->sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
				  cp, sizeof(*cp));

		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
			adv_expire(hdev, MGMT_ADV_FLAG_LOCAL_NAME);
	}

	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int set_local_name(struct sock *sk, struct hci_dev *hdev, void *data,
			  u16 len)
{
	struct mgmt_cp_set_local_name *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	/* If the old values are the same as the new ones just return a
	 * direct command complete event.
	 */
	if (!memcmp(hdev->dev_name, cp->name, sizeof(hdev->dev_name)) &&
	    !memcmp(hdev->short_name, cp->short_name,
		    sizeof(hdev->short_name))) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
					data, len);
		goto failed;
	}

	memcpy(hdev->short_name, cp->short_name, sizeof(hdev->short_name));

	if (!hdev_is_powered(hdev)) {
		memcpy(hdev->dev_name, cp->name, sizeof(hdev->dev_name));

		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
					data, len);
		if (err < 0)
			goto failed;

		err = mgmt_limited_event(MGMT_EV_LOCAL_NAME_CHANGED, hdev, data,
					 len, HCI_MGMT_LOCAL_NAME_EVENTS, sk);
		ext_info_changed(hdev, sk);

		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_LOCAL_NAME, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	memcpy(hdev->dev_name, cp->name, sizeof(hdev->dev_name));

	hci_req_init(&req, hdev);

	if (lmp_bredr_capable(hdev)) {
		__hci_req_update_name(&req);
		__hci_req_update_eir(&req);
	}

	/* The name is stored in the scan response data and so
	 * no need to udpate the advertising data here.
	 */
	if (lmp_le_capable(hdev) && hci_dev_test_flag(hdev, HCI_ADVERTISING))
		__hci_req_update_scan_rsp_data(&req, hdev->cur_adv_instance);

	err = hci_req_run(&req, set_name_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int set_appearance(struct sock *sk, struct hci_dev *hdev, void *data,
			  u16 len)
{
	struct mgmt_cp_set_appearance *cp = data;
	u16 appearance;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_APPEARANCE,
				       MGMT_STATUS_NOT_SUPPORTED);

	appearance = le16_to_cpu(cp->appearance);

	hci_dev_lock(hdev);

	if (hdev->appearance != appearance) {
		hdev->appearance = appearance;

		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
			adv_expire(hdev, MGMT_ADV_FLAG_APPEARANCE);

		ext_info_changed(hdev, sk);
	}

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_APPEARANCE, 0, NULL,
				0);

	hci_dev_unlock(hdev);

	return err;
}

static int get_phy_configuration(struct sock *sk, struct hci_dev *hdev,
				 void *data, u16 len)
{
	struct mgmt_rp_get_phy_configuration rp;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	memset(&rp, 0, sizeof(rp));

	rp.supported_phys = cpu_to_le32(get_supported_phys(hdev));
	rp.selected_phys = cpu_to_le32(get_selected_phys(hdev));
	rp.configurable_phys = cpu_to_le32(get_configurable_phys(hdev));

	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_PHY_CONFIGURATION, 0,
				 &rp, sizeof(rp));
}

int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip)
{
	struct mgmt_ev_phy_configuration_changed ev;

	memset(&ev, 0, sizeof(ev));

	ev.selected_phys = cpu_to_le32(get_selected_phys(hdev));

	return mgmt_event(MGMT_EV_PHY_CONFIGURATION_CHANGED, hdev, &ev,
			  sizeof(ev), skip);
}

static void set_default_phy_complete(struct hci_dev *hdev, u8 status,
				     u16 opcode, struct sk_buff *skb)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status 0x%02x", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_PHY_CONFIGURATION, hdev);
	if (!cmd)
		goto unlock;

	if (status) {
		mgmt_cmd_status(cmd->sk, hdev->id,
				MGMT_OP_SET_PHY_CONFIGURATION,
				mgmt_status(status));
	} else {
		mgmt_cmd_complete(cmd->sk, hdev->id,
				  MGMT_OP_SET_PHY_CONFIGURATION, 0,
				  NULL, 0);

		mgmt_phy_configuration_changed(hdev, cmd->sk);
	}

	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int set_phy_configuration(struct sock *sk, struct hci_dev *hdev,
				 void *data, u16 len)
{
	struct mgmt_cp_set_phy_configuration *cp = data;
	struct hci_cp_le_set_default_phy cp_phy;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	u32 selected_phys, configurable_phys, supported_phys, unconfigure_phys;
	u16 pkt_type = (HCI_DH1 | HCI_DM1);
	bool changed = false;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	configurable_phys = get_configurable_phys(hdev);
	supported_phys = get_supported_phys(hdev);
	selected_phys = __le32_to_cpu(cp->selected_phys);

	if (selected_phys & ~supported_phys)
		return mgmt_cmd_status(sk, hdev->id,
				       MGMT_OP_SET_PHY_CONFIGURATION,
				       MGMT_STATUS_INVALID_PARAMS);

	unconfigure_phys = supported_phys & ~configurable_phys;

	if ((selected_phys & unconfigure_phys) != unconfigure_phys)
		return mgmt_cmd_status(sk, hdev->id,
				       MGMT_OP_SET_PHY_CONFIGURATION,
				       MGMT_STATUS_INVALID_PARAMS);

	if (selected_phys == get_selected_phys(hdev))
		return mgmt_cmd_complete(sk, hdev->id,
					 MGMT_OP_SET_PHY_CONFIGURATION,
					 0, NULL, 0);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id,
				      MGMT_OP_SET_PHY_CONFIGURATION,
				      MGMT_STATUS_REJECTED);
		goto unlock;
	}

	if (pending_find(MGMT_OP_SET_PHY_CONFIGURATION, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id,
				      MGMT_OP_SET_PHY_CONFIGURATION,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	if (selected_phys & MGMT_PHY_BR_1M_3SLOT)
		pkt_type |= (HCI_DH3 | HCI_DM3);
	else
		pkt_type &= ~(HCI_DH3 | HCI_DM3);

	if (selected_phys & MGMT_PHY_BR_1M_5SLOT)
		pkt_type |= (HCI_DH5 | HCI_DM5);
	else
		pkt_type &= ~(HCI_DH5 | HCI_DM5);

	if (selected_phys & MGMT_PHY_EDR_2M_1SLOT)
		pkt_type &= ~HCI_2DH1;
	else
		pkt_type |= HCI_2DH1;

	if (selected_phys & MGMT_PHY_EDR_2M_3SLOT)
		pkt_type &= ~HCI_2DH3;
	else
		pkt_type |= HCI_2DH3;

	if (selected_phys & MGMT_PHY_EDR_2M_5SLOT)
		pkt_type &= ~HCI_2DH5;
	else
		pkt_type |= HCI_2DH5;

	if (selected_phys & MGMT_PHY_EDR_3M_1SLOT)
		pkt_type &= ~HCI_3DH1;
	else
		pkt_type |= HCI_3DH1;

	if (selected_phys & MGMT_PHY_EDR_3M_3SLOT)
		pkt_type &= ~HCI_3DH3;
	else
		pkt_type |= HCI_3DH3;

	if (selected_phys & MGMT_PHY_EDR_3M_5SLOT)
		pkt_type &= ~HCI_3DH5;
	else
		pkt_type |= HCI_3DH5;

	if (pkt_type != hdev->pkt_type) {
		hdev->pkt_type = pkt_type;
		changed = true;
	}

	if ((selected_phys & MGMT_PHY_LE_MASK) ==
	    (get_selected_phys(hdev) & MGMT_PHY_LE_MASK)) {
		if (changed)
			mgmt_phy_configuration_changed(hdev, sk);

		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_SET_PHY_CONFIGURATION,
					0, NULL, 0);

		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_PHY_CONFIGURATION, hdev, data,
			       len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	hci_req_init(&req, hdev);

	memset(&cp_phy, 0, sizeof(cp_phy));

	if (!(selected_phys & MGMT_PHY_LE_TX_MASK))
		cp_phy.all_phys |= 0x01;

	if (!(selected_phys & MGMT_PHY_LE_RX_MASK))
		cp_phy.all_phys |= 0x02;

	if (selected_phys & MGMT_PHY_LE_1M_TX)
		cp_phy.tx_phys |= HCI_LE_SET_PHY_1M;

	if (selected_phys & MGMT_PHY_LE_2M_TX)
		cp_phy.tx_phys |= HCI_LE_SET_PHY_2M;

	if (selected_phys & MGMT_PHY_LE_CODED_TX)
		cp_phy.tx_phys |= HCI_LE_SET_PHY_CODED;

	if (selected_phys & MGMT_PHY_LE_1M_RX)
		cp_phy.rx_phys |= HCI_LE_SET_PHY_1M;

	if (selected_phys & MGMT_PHY_LE_2M_RX)
		cp_phy.rx_phys |= HCI_LE_SET_PHY_2M;

	if (selected_phys & MGMT_PHY_LE_CODED_RX)
		cp_phy.rx_phys |= HCI_LE_SET_PHY_CODED;

	hci_req_add(&req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp_phy), &cp_phy);

	err = hci_req_run_skb(&req, set_default_phy_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);

	return err;
}

static int set_blocked_keys(struct sock *sk, struct hci_dev *hdev, void *data,
			    u16 len)
{
	int err = MGMT_STATUS_SUCCESS;
	struct mgmt_cp_set_blocked_keys *keys = data;
	const u16 max_key_count = ((U16_MAX - sizeof(*keys)) /
				   sizeof(struct mgmt_blocked_key_info));
	u16 key_count, expected_len;
	int i;

	bt_dev_dbg(hdev, "sock %p", sk);

	key_count = __le16_to_cpu(keys->key_count);
	if (key_count > max_key_count) {
		bt_dev_err(hdev, "too big key_count value %u", key_count);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BLOCKED_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	expected_len = struct_size(keys, keys, key_count);
	if (expected_len != len) {
		bt_dev_err(hdev, "expected %u bytes, got %u bytes",
			   expected_len, len);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BLOCKED_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	hci_dev_lock(hdev);

	hci_blocked_keys_clear(hdev);

	for (i = 0; i < keys->key_count; ++i) {
		struct blocked_key *b = kzalloc(sizeof(*b), GFP_KERNEL);

		if (!b) {
			err = MGMT_STATUS_NO_RESOURCES;
			break;
		}

		b->type = keys->keys[i].type;
		memcpy(b->val, keys->keys[i].val, sizeof(b->val));
		list_add_rcu(&b->list, &hdev->blocked_keys);
	}
	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_BLOCKED_KEYS,
				err, NULL, 0);
}

static int set_wideband_speech(struct sock *sk, struct hci_dev *hdev,
			       void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	int err;
	bool changed = false;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!test_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks))
		return mgmt_cmd_status(sk, hdev->id,
				       MGMT_OP_SET_WIDEBAND_SPEECH,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id,
				       MGMT_OP_SET_WIDEBAND_SPEECH,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (pending_find(MGMT_OP_SET_WIDEBAND_SPEECH, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id,
				      MGMT_OP_SET_WIDEBAND_SPEECH,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	if (hdev_is_powered(hdev) &&
	    !!cp->val != hci_dev_test_flag(hdev,
					   HCI_WIDEBAND_SPEECH_ENABLED)) {
		err = mgmt_cmd_status(sk, hdev->id,
				      MGMT_OP_SET_WIDEBAND_SPEECH,
				      MGMT_STATUS_REJECTED);
		goto unlock;
	}

	if (cp->val)
		changed = !hci_dev_test_and_set_flag(hdev,
						   HCI_WIDEBAND_SPEECH_ENABLED);
	else
		changed = hci_dev_test_and_clear_flag(hdev,
						   HCI_WIDEBAND_SPEECH_ENABLED);

	err = send_settings_rsp(sk, MGMT_OP_SET_WIDEBAND_SPEECH, hdev);
	if (err < 0)
		goto unlock;

	if (changed)
		err = new_settings(hdev, sk);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int read_controller_cap(struct sock *sk, struct hci_dev *hdev,
			       void *data, u16 data_len)
{
	char buf[20];
	struct mgmt_rp_read_controller_cap *rp = (void *)buf;
	u16 cap_len = 0;
	u8 flags = 0;
	u8 tx_power_range[2];

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&buf, 0, sizeof(buf));

	hci_dev_lock(hdev);

	/* When the Read Simple Pairing Options command is supported, then
	 * the remote public key validation is supported.
	 *
	 * Alternatively, when Microsoft extensions are available, they can
	 * indicate support for public key validation as well.
	 */
	if ((hdev->commands[41] & 0x08) || msft_curve_validity(hdev))
		flags |= 0x01;	/* Remote public key validation (BR/EDR) */

	flags |= 0x02;		/* Remote public key validation (LE) */

	/* When the Read Encryption Key Size command is supported, then the
	 * encryption key size is enforced.
	 */
	if (hdev->commands[20] & 0x10)
		flags |= 0x04;	/* Encryption key size enforcement (BR/EDR) */

	flags |= 0x08;		/* Encryption key size enforcement (LE) */

	cap_len = eir_append_data(rp->cap, cap_len, MGMT_CAP_SEC_FLAGS,
				  &flags, 1);

	/* When the Read Simple Pairing Options command is supported, then
	 * also max encryption key size information is provided.
	 */
	if (hdev->commands[41] & 0x08)
		cap_len = eir_append_le16(rp->cap, cap_len,
					  MGMT_CAP_MAX_ENC_KEY_SIZE,
					  hdev->max_enc_key_size);

	cap_len = eir_append_le16(rp->cap, cap_len,
				  MGMT_CAP_SMP_MAX_ENC_KEY_SIZE,
				  SMP_MAX_ENC_KEY_SIZE);

	/* Append the min/max LE tx power parameters if we were able to fetch
	 * it from the controller
	 */
	if (hdev->commands[38] & 0x80) {
		memcpy(&tx_power_range[0], &hdev->min_le_tx_power, 1);
		memcpy(&tx_power_range[1], &hdev->max_le_tx_power, 1);
		cap_len = eir_append_data(rp->cap, cap_len, MGMT_CAP_LE_TX_PWR,
					  tx_power_range, 2);
	}

	rp->cap_len = cpu_to_le16(cap_len);

	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_CONTROLLER_CAP, 0,
				 rp, sizeof(*rp) + cap_len);
}

#ifdef CONFIG_BT_FEATURE_DEBUG
/* d4992530-b9ec-469f-ab01-6c481c47da1c */
static const u8 debug_uuid[16] = {
	0x1c, 0xda, 0x47, 0x1c, 0x48, 0x6c, 0x01, 0xab,
	0x9f, 0x46, 0xec, 0xb9, 0x30, 0x25, 0x99, 0xd4,
};
#endif

/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */
static const u8 simult_central_periph_uuid[16] = {
	0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92,
	0x96, 0x46, 0xc0, 0x42, 0xb5, 0x10, 0x1b, 0x67,
};

/* 15c0a148-c273-11ea-b3de-0242ac130004 */
static const u8 rpa_resolution_uuid[16] = {
	0x04, 0x00, 0x13, 0xac, 0x42, 0x02, 0xde, 0xb3,
	0xea, 0x11, 0x73, 0xc2, 0x48, 0xa1, 0xc0, 0x15,
};

static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
				  void *data, u16 data_len)
{
	char buf[62];	/* Enough space for 3 features */
	struct mgmt_rp_read_exp_features_info *rp = (void *)buf;
	u16 idx = 0;
	u32 flags;

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&buf, 0, sizeof(buf));

#ifdef CONFIG_BT_FEATURE_DEBUG
	if (!hdev) {
		flags = bt_dbg_get() ? BIT(0) : 0;

		memcpy(rp->features[idx].uuid, debug_uuid, 16);
		rp->features[idx].flags = cpu_to_le32(flags);
		idx++;
	}
#endif

	if (hdev) {
		if (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) &&
		    (hdev->le_states[4] & 0x08) &&	/* Central */
		    (hdev->le_states[4] & 0x40) &&	/* Peripheral */
		    (hdev->le_states[3] & 0x10))	/* Simultaneous */
			flags = BIT(0);
		else
			flags = 0;

		memcpy(rp->features[idx].uuid, simult_central_periph_uuid, 16);
		rp->features[idx].flags = cpu_to_le32(flags);
		idx++;
	}

	if (hdev && use_ll_privacy(hdev)) {
		if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
			flags = BIT(0) | BIT(1);
		else
			flags = BIT(1);

		memcpy(rp->features[idx].uuid, rpa_resolution_uuid, 16);
		rp->features[idx].flags = cpu_to_le32(flags);
		idx++;
	}

	rp->feature_count = cpu_to_le16(idx);

	/* After reading the experimental features information, enable
	 * the events to update client on any future change.
	 */
	hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);

	return mgmt_cmd_complete(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
				 MGMT_OP_READ_EXP_FEATURES_INFO,
				 0, rp, sizeof(*rp) + (20 * idx));
}

static int exp_ll_privacy_feature_changed(bool enabled, struct hci_dev *hdev,
					  struct sock *skip)
{
	struct mgmt_ev_exp_feature_changed ev;

	memset(&ev, 0, sizeof(ev));
	memcpy(ev.uuid, rpa_resolution_uuid, 16);
	ev.flags = cpu_to_le32((enabled ? BIT(0) : 0) | BIT(1));

	return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, hdev,
				  &ev, sizeof(ev),
				  HCI_MGMT_EXP_FEATURE_EVENTS, skip);

}

#ifdef CONFIG_BT_FEATURE_DEBUG
static int exp_debug_feature_changed(bool enabled, struct sock *skip)
{
	struct mgmt_ev_exp_feature_changed ev;

	memset(&ev, 0, sizeof(ev));
	memcpy(ev.uuid, debug_uuid, 16);
	ev.flags = cpu_to_le32(enabled ? BIT(0) : 0);

	return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, NULL,
				  &ev, sizeof(ev),
				  HCI_MGMT_EXP_FEATURE_EVENTS, skip);
}
#endif

static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
			   void *data, u16 data_len)
{
	struct mgmt_cp_set_exp_feature *cp = data;
	struct mgmt_rp_set_exp_feature rp;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!memcmp(cp->uuid, ZERO_KEY, 16)) {
		memset(rp.uuid, 0, 16);
		rp.flags = cpu_to_le32(0);

#ifdef CONFIG_BT_FEATURE_DEBUG
		if (!hdev) {
			bool changed = bt_dbg_get();

			bt_dbg_set(false);

			if (changed)
				exp_debug_feature_changed(false, sk);
		}
#endif

		if (hdev && use_ll_privacy(hdev) && !hdev_is_powered(hdev)) {
			bool changed = hci_dev_test_flag(hdev,
							 HCI_ENABLE_LL_PRIVACY);

			hci_dev_clear_flag(hdev, HCI_ENABLE_LL_PRIVACY);

			if (changed)
				exp_ll_privacy_feature_changed(false, hdev, sk);
		}

		hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);

		return mgmt_cmd_complete(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
					 MGMT_OP_SET_EXP_FEATURE, 0,
					 &rp, sizeof(rp));
	}

#ifdef CONFIG_BT_FEATURE_DEBUG
	if (!memcmp(cp->uuid, debug_uuid, 16)) {
		bool val, changed;
		int err;

		/* Command requires to use the non-controller index */
		if (hdev)
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_INVALID_INDEX);

		/* Parameters are limited to a single octet */
		if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)
			return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_INVALID_PARAMS);

		/* Only boolean on/off is supported */
		if (cp->param[0] != 0x00 && cp->param[0] != 0x01)
			return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_INVALID_PARAMS);

		val = !!cp->param[0];
		changed = val ? !bt_dbg_get() : bt_dbg_get();
		bt_dbg_set(val);

		memcpy(rp.uuid, debug_uuid, 16);
		rp.flags = cpu_to_le32(val ? BIT(0) : 0);

		hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);

		err = mgmt_cmd_complete(sk, MGMT_INDEX_NONE,
					MGMT_OP_SET_EXP_FEATURE, 0,
					&rp, sizeof(rp));

		if (changed)
			exp_debug_feature_changed(val, sk);

		return err;
	}
#endif

	if (!memcmp(cp->uuid, rpa_resolution_uuid, 16)) {
		bool val, changed;
		int err;
		u32 flags;

		/* Command requires to use the controller index */
		if (!hdev)
			return mgmt_cmd_status(sk, MGMT_INDEX_NONE,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_INVALID_INDEX);

		/* Changes can only be made when controller is powered down */
		if (hdev_is_powered(hdev))
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_REJECTED);

		/* Parameters are limited to a single octet */
		if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1)
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_INVALID_PARAMS);

		/* Only boolean on/off is supported */
		if (cp->param[0] != 0x00 && cp->param[0] != 0x01)
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_SET_EXP_FEATURE,
					       MGMT_STATUS_INVALID_PARAMS);

		val = !!cp->param[0];

		if (val) {
			changed = !hci_dev_test_flag(hdev,
						     HCI_ENABLE_LL_PRIVACY);
			hci_dev_set_flag(hdev, HCI_ENABLE_LL_PRIVACY);
			hci_dev_clear_flag(hdev, HCI_ADVERTISING);

			/* Enable LL privacy + supported settings changed */
			flags = BIT(0) | BIT(1);
		} else {
			changed = hci_dev_test_flag(hdev,
						    HCI_ENABLE_LL_PRIVACY);
			hci_dev_clear_flag(hdev, HCI_ENABLE_LL_PRIVACY);

			/* Disable LL privacy + supported settings changed */
			flags = BIT(1);
		}

		memcpy(rp.uuid, rpa_resolution_uuid, 16);
		rp.flags = cpu_to_le32(flags);

		hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);

		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_SET_EXP_FEATURE, 0,
					&rp, sizeof(rp));

		if (changed)
			exp_ll_privacy_feature_changed(val, hdev, sk);

		return err;
	}

	return mgmt_cmd_status(sk, hdev ? hdev->id : MGMT_INDEX_NONE,
			       MGMT_OP_SET_EXP_FEATURE,
			       MGMT_STATUS_NOT_SUPPORTED);
}

#define SUPPORTED_DEVICE_FLAGS() ((1U << HCI_CONN_FLAG_MAX) - 1)

static int get_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
			    u16 data_len)
{
	struct mgmt_cp_get_device_flags *cp = data;
	struct mgmt_rp_get_device_flags rp;
	struct bdaddr_list_with_flags *br_params;
	struct hci_conn_params *params;
	u32 supported_flags = SUPPORTED_DEVICE_FLAGS();
	u32 current_flags = 0;
	u8 status = MGMT_STATUS_INVALID_PARAMS;

	bt_dev_dbg(hdev, "Get device flags %pMR (type 0x%x)\n",
		   &cp->addr.bdaddr, cp->addr.type);

	hci_dev_lock(hdev);

	if (cp->addr.type == BDADDR_BREDR) {
		br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
							      &cp->addr.bdaddr,
							      cp->addr.type);
		if (!br_params)
			goto done;

		current_flags = br_params->current_flags;
	} else {
		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
						le_addr_type(cp->addr.type));

		if (!params)
			goto done;

		current_flags = params->current_flags;
	}

	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
	rp.addr.type = cp->addr.type;
	rp.supported_flags = cpu_to_le32(supported_flags);
	rp.current_flags = cpu_to_le32(current_flags);

	status = MGMT_STATUS_SUCCESS;

done:
	hci_dev_unlock(hdev);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_DEVICE_FLAGS, status,
				&rp, sizeof(rp));
}

static void device_flags_changed(struct sock *sk, struct hci_dev *hdev,
				 bdaddr_t *bdaddr, u8 bdaddr_type,
				 u32 supported_flags, u32 current_flags)
{
	struct mgmt_ev_device_flags_changed ev;

	bacpy(&ev.addr.bdaddr, bdaddr);
	ev.addr.type = bdaddr_type;
	ev.supported_flags = cpu_to_le32(supported_flags);
	ev.current_flags = cpu_to_le32(current_flags);

	mgmt_event(MGMT_EV_DEVICE_FLAGS_CHANGED, hdev, &ev, sizeof(ev), sk);
}

static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
			    u16 len)
{
	struct mgmt_cp_set_device_flags *cp = data;
	struct bdaddr_list_with_flags *br_params;
	struct hci_conn_params *params;
	u8 status = MGMT_STATUS_INVALID_PARAMS;
	u32 supported_flags = SUPPORTED_DEVICE_FLAGS();
	u32 current_flags = __le32_to_cpu(cp->current_flags);

	bt_dev_dbg(hdev, "Set device flags %pMR (type 0x%x) = 0x%x",
		   &cp->addr.bdaddr, cp->addr.type,
		   __le32_to_cpu(current_flags));

	if ((supported_flags | current_flags) != supported_flags) {
		bt_dev_warn(hdev, "Bad flag given (0x%x) vs supported (0x%0x)",
			    current_flags, supported_flags);
		goto done;
	}

	hci_dev_lock(hdev);

	if (cp->addr.type == BDADDR_BREDR) {
		br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
							      &cp->addr.bdaddr,
							      cp->addr.type);

		if (br_params) {
			br_params->current_flags = current_flags;
			status = MGMT_STATUS_SUCCESS;
		} else {
			bt_dev_warn(hdev, "No such BR/EDR device %pMR (0x%x)",
				    &cp->addr.bdaddr, cp->addr.type);
		}
	} else {
		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
						le_addr_type(cp->addr.type));
		if (params) {
			params->current_flags = current_flags;
			status = MGMT_STATUS_SUCCESS;
		} else {
			bt_dev_warn(hdev, "No such LE device %pMR (0x%x)",
				    &cp->addr.bdaddr,
				    le_addr_type(cp->addr.type));
		}
	}

done:
	hci_dev_unlock(hdev);

	if (status == MGMT_STATUS_SUCCESS)
		device_flags_changed(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
				     supported_flags, current_flags);

	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEVICE_FLAGS, status,
				 &cp->addr, sizeof(cp->addr));
}

static void mgmt_adv_monitor_added(struct sock *sk, struct hci_dev *hdev,
				   u16 handle)
{
	struct mgmt_ev_adv_monitor_added ev;

	ev.monitor_handle = cpu_to_le16(handle);

	mgmt_event(MGMT_EV_ADV_MONITOR_ADDED, hdev, &ev, sizeof(ev), sk);
}

void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle)
{
	struct mgmt_ev_adv_monitor_removed ev;
	struct mgmt_pending_cmd *cmd;
	struct sock *sk_skip = NULL;
	struct mgmt_cp_remove_adv_monitor *cp;

	cmd = pending_find(MGMT_OP_REMOVE_ADV_MONITOR, hdev);
	if (cmd) {
		cp = cmd->param;

		if (cp->monitor_handle)
			sk_skip = cmd->sk;
	}

	ev.monitor_handle = cpu_to_le16(handle);

	mgmt_event(MGMT_EV_ADV_MONITOR_REMOVED, hdev, &ev, sizeof(ev), sk_skip);
}

static int read_adv_mon_features(struct sock *sk, struct hci_dev *hdev,
				 void *data, u16 len)
{
	struct adv_monitor *monitor = NULL;
	struct mgmt_rp_read_adv_monitor_features *rp = NULL;
	int handle, err;
	size_t rp_size = 0;
	__u32 supported = 0;
	__u32 enabled = 0;
	__u16 num_handles = 0;
	__u16 handles[HCI_MAX_ADV_MONITOR_NUM_HANDLES];

	BT_DBG("request for %s", hdev->name);

	hci_dev_lock(hdev);

	if (msft_monitor_supported(hdev))
		supported |= MGMT_ADV_MONITOR_FEATURE_MASK_OR_PATTERNS;

	idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
		handles[num_handles++] = monitor->handle;

	hci_dev_unlock(hdev);

	rp_size = sizeof(*rp) + (num_handles * sizeof(u16));
	rp = kmalloc(rp_size, GFP_KERNEL);
	if (!rp)
		return -ENOMEM;

	/* All supported features are currently enabled */
	enabled = supported;

	rp->supported_features = cpu_to_le32(supported);
	rp->enabled_features = cpu_to_le32(enabled);
	rp->max_num_handles = cpu_to_le16(HCI_MAX_ADV_MONITOR_NUM_HANDLES);
	rp->max_num_patterns = HCI_MAX_ADV_MONITOR_NUM_PATTERNS;
	rp->num_handles = cpu_to_le16(num_handles);
	if (num_handles)
		memcpy(&rp->handles, &handles, (num_handles * sizeof(u16)));

	err = mgmt_cmd_complete(sk, hdev->id,
				MGMT_OP_READ_ADV_MONITOR_FEATURES,
				MGMT_STATUS_SUCCESS, rp, rp_size);

	kfree(rp);

	return err;
}

int mgmt_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status)
{
	struct mgmt_rp_add_adv_patterns_monitor rp;
	struct mgmt_pending_cmd *cmd;
	struct adv_monitor *monitor;
	int err = 0;

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI, hdev);
	if (!cmd) {
		cmd = pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR, hdev);
		if (!cmd)
			goto done;
	}

	monitor = cmd->user_data;
	rp.monitor_handle = cpu_to_le16(monitor->handle);

	if (!status) {
		mgmt_adv_monitor_added(cmd->sk, hdev, monitor->handle);
		hdev->adv_monitors_cnt++;
		if (monitor->state == ADV_MONITOR_STATE_NOT_REGISTERED)
			monitor->state = ADV_MONITOR_STATE_REGISTERED;
		hci_update_background_scan(hdev);
	}

	err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
				mgmt_status(status), &rp, sizeof(rp));
	mgmt_pending_remove(cmd);

done:
	hci_dev_unlock(hdev);
	bt_dev_dbg(hdev, "add monitor %d complete, status %d",
		   rp.monitor_handle, status);

	return err;
}

static int __add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
				      struct adv_monitor *m, u8 status,
				      void *data, u16 len, u16 op)
{
	struct mgmt_rp_add_adv_patterns_monitor rp;
	struct mgmt_pending_cmd *cmd;
	int err;
	bool pending;

	hci_dev_lock(hdev);

	if (status)
		goto unlock;

	if (pending_find(MGMT_OP_SET_LE, hdev) ||
	    pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR, hdev) ||
	    pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI, hdev) ||
	    pending_find(MGMT_OP_REMOVE_ADV_MONITOR, hdev)) {
		status = MGMT_STATUS_BUSY;
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, op, hdev, data, len);
	if (!cmd) {
		status = MGMT_STATUS_NO_RESOURCES;
		goto unlock;
	}

	cmd->user_data = m;
	pending = hci_add_adv_monitor(hdev, m, &err);
	if (err) {
		if (err == -ENOSPC || err == -ENOMEM)
			status = MGMT_STATUS_NO_RESOURCES;
		else if (err == -EINVAL)
			status = MGMT_STATUS_INVALID_PARAMS;
		else
			status = MGMT_STATUS_FAILED;

		mgmt_pending_remove(cmd);
		goto unlock;
	}

	if (!pending) {
		mgmt_pending_remove(cmd);
		rp.monitor_handle = cpu_to_le16(m->handle);
		mgmt_adv_monitor_added(sk, hdev, m->handle);
		m->state = ADV_MONITOR_STATE_REGISTERED;
		hdev->adv_monitors_cnt++;

		hci_dev_unlock(hdev);
		return mgmt_cmd_complete(sk, hdev->id, op, MGMT_STATUS_SUCCESS,
					 &rp, sizeof(rp));
	}

	hci_dev_unlock(hdev);

	return 0;

unlock:
	hci_free_adv_monitor(hdev, m);
	hci_dev_unlock(hdev);
	return mgmt_cmd_status(sk, hdev->id, op, status);
}

static void parse_adv_monitor_rssi(struct adv_monitor *m,
				   struct mgmt_adv_rssi_thresholds *rssi)
{
	if (rssi) {
		m->rssi.low_threshold = rssi->low_threshold;
		m->rssi.low_threshold_timeout =
		    __le16_to_cpu(rssi->low_threshold_timeout);
		m->rssi.high_threshold = rssi->high_threshold;
		m->rssi.high_threshold_timeout =
		    __le16_to_cpu(rssi->high_threshold_timeout);
		m->rssi.sampling_period = rssi->sampling_period;
	} else {
		/* Default values. These numbers are the least constricting
		 * parameters for MSFT API to work, so it behaves as if there
		 * are no rssi parameter to consider. May need to be changed
		 * if other API are to be supported.
		 */
		m->rssi.low_threshold = -127;
		m->rssi.low_threshold_timeout = 60;
		m->rssi.high_threshold = -127;
		m->rssi.high_threshold_timeout = 0;
		m->rssi.sampling_period = 0;
	}
}

static u8 parse_adv_monitor_pattern(struct adv_monitor *m, u8 pattern_count,
				    struct mgmt_adv_pattern *patterns)
{
	u8 offset = 0, length = 0;
	struct adv_pattern *p = NULL;
	int i;

	for (i = 0; i < pattern_count; i++) {
		offset = patterns[i].offset;
		length = patterns[i].length;
		if (offset >= HCI_MAX_AD_LENGTH ||
		    length > HCI_MAX_AD_LENGTH ||
		    (offset + length) > HCI_MAX_AD_LENGTH)
			return MGMT_STATUS_INVALID_PARAMS;

		p = kmalloc(sizeof(*p), GFP_KERNEL);
		if (!p)
			return MGMT_STATUS_NO_RESOURCES;

		p->ad_type = patterns[i].ad_type;
		p->offset = patterns[i].offset;
		p->length = patterns[i].length;
		memcpy(p->value, patterns[i].value, p->length);

		INIT_LIST_HEAD(&p->list);
		list_add(&p->list, &m->patterns);
	}

	return MGMT_STATUS_SUCCESS;
}

static int add_adv_patterns_monitor(struct sock *sk, struct hci_dev *hdev,
				    void *data, u16 len)
{
	struct mgmt_cp_add_adv_patterns_monitor *cp = data;
	struct adv_monitor *m = NULL;
	u8 status = MGMT_STATUS_SUCCESS;
	size_t expected_size = sizeof(*cp);

	BT_DBG("request for %s", hdev->name);

	if (len <= sizeof(*cp)) {
		status = MGMT_STATUS_INVALID_PARAMS;
		goto done;
	}

	expected_size += cp->pattern_count * sizeof(struct mgmt_adv_pattern);
	if (len != expected_size) {
		status = MGMT_STATUS_INVALID_PARAMS;
		goto done;
	}

	m = kzalloc(sizeof(*m), GFP_KERNEL);
	if (!m) {
		status = MGMT_STATUS_NO_RESOURCES;
		goto done;
	}

	INIT_LIST_HEAD(&m->patterns);

	parse_adv_monitor_rssi(m, NULL);
	status = parse_adv_monitor_pattern(m, cp->pattern_count, cp->patterns);

done:
	return __add_adv_patterns_monitor(sk, hdev, m, status, data, len,
					  MGMT_OP_ADD_ADV_PATTERNS_MONITOR);
}

static int add_adv_patterns_monitor_rssi(struct sock *sk, struct hci_dev *hdev,
					 void *data, u16 len)
{
	struct mgmt_cp_add_adv_patterns_monitor_rssi *cp = data;
	struct adv_monitor *m = NULL;
	u8 status = MGMT_STATUS_SUCCESS;
	size_t expected_size = sizeof(*cp);

	BT_DBG("request for %s", hdev->name);

	if (len <= sizeof(*cp)) {
		status = MGMT_STATUS_INVALID_PARAMS;
		goto done;
	}

	expected_size += cp->pattern_count * sizeof(struct mgmt_adv_pattern);
	if (len != expected_size) {
		status = MGMT_STATUS_INVALID_PARAMS;
		goto done;
	}

	m = kzalloc(sizeof(*m), GFP_KERNEL);
	if (!m) {
		status = MGMT_STATUS_NO_RESOURCES;
		goto done;
	}

	INIT_LIST_HEAD(&m->patterns);

	parse_adv_monitor_rssi(m, &cp->rssi);
	status = parse_adv_monitor_pattern(m, cp->pattern_count, cp->patterns);

done:
	return __add_adv_patterns_monitor(sk, hdev, m, status, data, len,
					 MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI);
}

int mgmt_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status)
{
	struct mgmt_rp_remove_adv_monitor rp;
	struct mgmt_cp_remove_adv_monitor *cp;
	struct mgmt_pending_cmd *cmd;
	int err = 0;

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_REMOVE_ADV_MONITOR, hdev);
	if (!cmd)
		goto done;

	cp = cmd->param;
	rp.monitor_handle = cp->monitor_handle;

	if (!status)
		hci_update_background_scan(hdev);

	err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
				mgmt_status(status), &rp, sizeof(rp));
	mgmt_pending_remove(cmd);

done:
	hci_dev_unlock(hdev);
	bt_dev_dbg(hdev, "remove monitor %d complete, status %d",
		   rp.monitor_handle, status);

	return err;
}

static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev,
			      void *data, u16 len)
{
	struct mgmt_cp_remove_adv_monitor *cp = data;
	struct mgmt_rp_remove_adv_monitor rp;
	struct mgmt_pending_cmd *cmd;
	u16 handle = __le16_to_cpu(cp->monitor_handle);
	int err, status;
	bool pending;

	BT_DBG("request for %s", hdev->name);
	rp.monitor_handle = cp->monitor_handle;

	hci_dev_lock(hdev);

	if (pending_find(MGMT_OP_SET_LE, hdev) ||
	    pending_find(MGMT_OP_REMOVE_ADV_MONITOR, hdev) ||
	    pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR, hdev) ||
	    pending_find(MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI, hdev)) {
		status = MGMT_STATUS_BUSY;
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_REMOVE_ADV_MONITOR, hdev, data, len);
	if (!cmd) {
		status = MGMT_STATUS_NO_RESOURCES;
		goto unlock;
	}

	if (handle)
		pending = hci_remove_single_adv_monitor(hdev, handle, &err);
	else
		pending = hci_remove_all_adv_monitor(hdev, &err);

	if (err) {
		mgmt_pending_remove(cmd);

		if (err == -ENOENT)
			status = MGMT_STATUS_INVALID_INDEX;
		else
			status = MGMT_STATUS_FAILED;

		goto unlock;
	}

	/* monitor can be removed without forwarding request to controller */
	if (!pending) {
		mgmt_pending_remove(cmd);
		hci_dev_unlock(hdev);

		return mgmt_cmd_complete(sk, hdev->id,
					 MGMT_OP_REMOVE_ADV_MONITOR,
					 MGMT_STATUS_SUCCESS,
					 &rp, sizeof(rp));
	}

	hci_dev_unlock(hdev);
	return 0;

unlock:
	hci_dev_unlock(hdev);
	return mgmt_cmd_status(sk, hdev->id, MGMT_OP_REMOVE_ADV_MONITOR,
			       status);
}

static void read_local_oob_data_complete(struct hci_dev *hdev, u8 status,
				         u16 opcode, struct sk_buff *skb)
{
	struct mgmt_rp_read_local_oob_data mgmt_rp;
	size_t rp_size = sizeof(mgmt_rp);
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status %u", status);

	cmd = pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev);
	if (!cmd)
		return;

	if (status || !skb) {
		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
				status ? mgmt_status(status) : MGMT_STATUS_FAILED);
		goto remove;
	}

	memset(&mgmt_rp, 0, sizeof(mgmt_rp));

	if (opcode == HCI_OP_READ_LOCAL_OOB_DATA) {
		struct hci_rp_read_local_oob_data *rp = (void *) skb->data;

		if (skb->len < sizeof(*rp)) {
			mgmt_cmd_status(cmd->sk, hdev->id,
					MGMT_OP_READ_LOCAL_OOB_DATA,
					MGMT_STATUS_FAILED);
			goto remove;
		}

		memcpy(mgmt_rp.hash192, rp->hash, sizeof(rp->hash));
		memcpy(mgmt_rp.rand192, rp->rand, sizeof(rp->rand));

		rp_size -= sizeof(mgmt_rp.hash256) + sizeof(mgmt_rp.rand256);
	} else {
		struct hci_rp_read_local_oob_ext_data *rp = (void *) skb->data;

		if (skb->len < sizeof(*rp)) {
			mgmt_cmd_status(cmd->sk, hdev->id,
					MGMT_OP_READ_LOCAL_OOB_DATA,
					MGMT_STATUS_FAILED);
			goto remove;
		}

		memcpy(mgmt_rp.hash192, rp->hash192, sizeof(rp->hash192));
		memcpy(mgmt_rp.rand192, rp->rand192, sizeof(rp->rand192));

		memcpy(mgmt_rp.hash256, rp->hash256, sizeof(rp->hash256));
		memcpy(mgmt_rp.rand256, rp->rand256, sizeof(rp->rand256));
	}

	mgmt_cmd_complete(cmd->sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
			  MGMT_STATUS_SUCCESS, &mgmt_rp, rp_size);

remove:
	mgmt_pending_remove(cmd);
}

static int read_local_oob_data(struct sock *sk, struct hci_dev *hdev,
			       void *data, u16 data_len)
{
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
				      MGMT_STATUS_NOT_POWERED);
		goto unlock;
	}

	if (!lmp_ssp_capable(hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
				      MGMT_STATUS_NOT_SUPPORTED);
		goto unlock;
	}

	if (pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_DATA,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_READ_LOCAL_OOB_DATA, hdev, NULL, 0);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	hci_req_init(&req, hdev);

	if (bredr_sc_enabled(hdev))
		hci_req_add(&req, HCI_OP_READ_LOCAL_OOB_EXT_DATA, 0, NULL);
	else
		hci_req_add(&req, HCI_OP_READ_LOCAL_OOB_DATA, 0, NULL);

	err = hci_req_run_skb(&req, read_local_oob_data_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int add_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
			       void *data, u16 len)
{
	struct mgmt_addr_info *addr = data;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!bdaddr_type_is_valid(addr->type))
		return mgmt_cmd_complete(sk, hdev->id,
					 MGMT_OP_ADD_REMOTE_OOB_DATA,
					 MGMT_STATUS_INVALID_PARAMS,
					 addr, sizeof(*addr));

	hci_dev_lock(hdev);

	if (len == MGMT_ADD_REMOTE_OOB_DATA_SIZE) {
		struct mgmt_cp_add_remote_oob_data *cp = data;
		u8 status;

		if (cp->addr.type != BDADDR_BREDR) {
			err = mgmt_cmd_complete(sk, hdev->id,
						MGMT_OP_ADD_REMOTE_OOB_DATA,
						MGMT_STATUS_INVALID_PARAMS,
						&cp->addr, sizeof(cp->addr));
			goto unlock;
		}

		err = hci_add_remote_oob_data(hdev, &cp->addr.bdaddr,
					      cp->addr.type, cp->hash,
					      cp->rand, NULL, NULL);
		if (err < 0)
			status = MGMT_STATUS_FAILED;
		else
			status = MGMT_STATUS_SUCCESS;

		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_ADD_REMOTE_OOB_DATA, status,
					&cp->addr, sizeof(cp->addr));
	} else if (len == MGMT_ADD_REMOTE_OOB_EXT_DATA_SIZE) {
		struct mgmt_cp_add_remote_oob_ext_data *cp = data;
		u8 *rand192, *hash192, *rand256, *hash256;
		u8 status;

		if (bdaddr_type_is_le(cp->addr.type)) {
			/* Enforce zero-valued 192-bit parameters as
			 * long as legacy SMP OOB isn't implemented.
			 */
			if (memcmp(cp->rand192, ZERO_KEY, 16) ||
			    memcmp(cp->hash192, ZERO_KEY, 16)) {
				err = mgmt_cmd_complete(sk, hdev->id,
							MGMT_OP_ADD_REMOTE_OOB_DATA,
							MGMT_STATUS_INVALID_PARAMS,
							addr, sizeof(*addr));
				goto unlock;
			}

			rand192 = NULL;
			hash192 = NULL;
		} else {
			/* In case one of the P-192 values is set to zero,
			 * then just disable OOB data for P-192.
			 */
			if (!memcmp(cp->rand192, ZERO_KEY, 16) ||
			    !memcmp(cp->hash192, ZERO_KEY, 16)) {
				rand192 = NULL;
				hash192 = NULL;
			} else {
				rand192 = cp->rand192;
				hash192 = cp->hash192;
			}
		}

		/* In case one of the P-256 values is set to zero, then just
		 * disable OOB data for P-256.
		 */
		if (!memcmp(cp->rand256, ZERO_KEY, 16) ||
		    !memcmp(cp->hash256, ZERO_KEY, 16)) {
			rand256 = NULL;
			hash256 = NULL;
		} else {
			rand256 = cp->rand256;
			hash256 = cp->hash256;
		}

		err = hci_add_remote_oob_data(hdev, &cp->addr.bdaddr,
					      cp->addr.type, hash192, rand192,
					      hash256, rand256);
		if (err < 0)
			status = MGMT_STATUS_FAILED;
		else
			status = MGMT_STATUS_SUCCESS;

		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_ADD_REMOTE_OOB_DATA,
					status, &cp->addr, sizeof(cp->addr));
	} else {
		bt_dev_err(hdev, "add_remote_oob_data: invalid len of %u bytes",
			   len);
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_REMOTE_OOB_DATA,
				      MGMT_STATUS_INVALID_PARAMS);
	}

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int remove_remote_oob_data(struct sock *sk, struct hci_dev *hdev,
				  void *data, u16 len)
{
	struct mgmt_cp_remove_remote_oob_data *cp = data;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (cp->addr.type != BDADDR_BREDR)
		return mgmt_cmd_complete(sk, hdev->id,
					 MGMT_OP_REMOVE_REMOTE_OOB_DATA,
					 MGMT_STATUS_INVALID_PARAMS,
					 &cp->addr, sizeof(cp->addr));

	hci_dev_lock(hdev);

	if (!bacmp(&cp->addr.bdaddr, BDADDR_ANY)) {
		hci_remote_oob_data_clear(hdev);
		status = MGMT_STATUS_SUCCESS;
		goto done;
	}

	err = hci_remove_remote_oob_data(hdev, &cp->addr.bdaddr, cp->addr.type);
	if (err < 0)
		status = MGMT_STATUS_INVALID_PARAMS;
	else
		status = MGMT_STATUS_SUCCESS;

done:
	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_REMOTE_OOB_DATA,
				status, &cp->addr, sizeof(cp->addr));

	hci_dev_unlock(hdev);
	return err;
}

void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status %d", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_START_DISCOVERY, hdev);
	if (!cmd)
		cmd = pending_find(MGMT_OP_START_SERVICE_DISCOVERY, hdev);

	if (!cmd)
		cmd = pending_find(MGMT_OP_START_LIMITED_DISCOVERY, hdev);

	if (cmd) {
		cmd->cmd_complete(cmd, mgmt_status(status));
		mgmt_pending_remove(cmd);
	}

	hci_dev_unlock(hdev);

	/* Handle suspend notifier */
	if (test_and_clear_bit(SUSPEND_UNPAUSE_DISCOVERY,
			       hdev->suspend_tasks)) {
		bt_dev_dbg(hdev, "Unpaused discovery");
		wake_up(&hdev->suspend_wait_q);
	}
}

static bool discovery_type_is_valid(struct hci_dev *hdev, uint8_t type,
				    uint8_t *mgmt_status)
{
	switch (type) {
	case DISCOV_TYPE_LE:
		*mgmt_status = mgmt_le_support(hdev);
		if (*mgmt_status)
			return false;
		break;
	case DISCOV_TYPE_INTERLEAVED:
		*mgmt_status = mgmt_le_support(hdev);
		if (*mgmt_status)
			return false;
		fallthrough;
	case DISCOV_TYPE_BREDR:
		*mgmt_status = mgmt_bredr_support(hdev);
		if (*mgmt_status)
			return false;
		break;
	default:
		*mgmt_status = MGMT_STATUS_INVALID_PARAMS;
		return false;
	}

	return true;
}

static int start_discovery_internal(struct sock *sk, struct hci_dev *hdev,
				    u16 op, void *data, u16 len)
{
	struct mgmt_cp_start_discovery *cp = data;
	struct mgmt_pending_cmd *cmd;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, op,
					MGMT_STATUS_NOT_POWERED,
					&cp->type, sizeof(cp->type));
		goto failed;
	}

	if (hdev->discovery.state != DISCOVERY_STOPPED ||
	    hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) {
		err = mgmt_cmd_complete(sk, hdev->id, op, MGMT_STATUS_BUSY,
					&cp->type, sizeof(cp->type));
		goto failed;
	}

	if (!discovery_type_is_valid(hdev, cp->type, &status)) {
		err = mgmt_cmd_complete(sk, hdev->id, op, status,
					&cp->type, sizeof(cp->type));
		goto failed;
	}

	/* Can't start discovery when it is paused */
	if (hdev->discovery_paused) {
		err = mgmt_cmd_complete(sk, hdev->id, op, MGMT_STATUS_BUSY,
					&cp->type, sizeof(cp->type));
		goto failed;
	}

	/* Clear the discovery filter first to free any previously
	 * allocated memory for the UUID list.
	 */
	hci_discovery_filter_clear(hdev);

	hdev->discovery.type = cp->type;
	hdev->discovery.report_invalid_rssi = false;
	if (op == MGMT_OP_START_LIMITED_DISCOVERY)
		hdev->discovery.limited = true;
	else
		hdev->discovery.limited = false;

	cmd = mgmt_pending_add(sk, op, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	cmd->cmd_complete = generic_cmd_complete;

	hci_discovery_set_state(hdev, DISCOVERY_STARTING);
	queue_work(hdev->req_workqueue, &hdev->discov_update);
	err = 0;

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int start_discovery(struct sock *sk, struct hci_dev *hdev,
			   void *data, u16 len)
{
	return start_discovery_internal(sk, hdev, MGMT_OP_START_DISCOVERY,
					data, len);
}

static int start_limited_discovery(struct sock *sk, struct hci_dev *hdev,
				   void *data, u16 len)
{
	return start_discovery_internal(sk, hdev,
					MGMT_OP_START_LIMITED_DISCOVERY,
					data, len);
}

static int service_discovery_cmd_complete(struct mgmt_pending_cmd *cmd,
					  u8 status)
{
	return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
				 cmd->param, 1);
}

static int start_service_discovery(struct sock *sk, struct hci_dev *hdev,
				   void *data, u16 len)
{
	struct mgmt_cp_start_service_discovery *cp = data;
	struct mgmt_pending_cmd *cmd;
	const u16 max_uuid_count = ((U16_MAX - sizeof(*cp)) / 16);
	u16 uuid_count, expected_len;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_START_SERVICE_DISCOVERY,
					MGMT_STATUS_NOT_POWERED,
					&cp->type, sizeof(cp->type));
		goto failed;
	}

	if (hdev->discovery.state != DISCOVERY_STOPPED ||
	    hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) {
		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_START_SERVICE_DISCOVERY,
					MGMT_STATUS_BUSY, &cp->type,
					sizeof(cp->type));
		goto failed;
	}

	if (hdev->discovery_paused) {
		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_START_SERVICE_DISCOVERY,
					MGMT_STATUS_BUSY, &cp->type,
					sizeof(cp->type));
		goto failed;
	}

	uuid_count = __le16_to_cpu(cp->uuid_count);
	if (uuid_count > max_uuid_count) {
		bt_dev_err(hdev, "service_discovery: too big uuid_count value %u",
			   uuid_count);
		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_START_SERVICE_DISCOVERY,
					MGMT_STATUS_INVALID_PARAMS, &cp->type,
					sizeof(cp->type));
		goto failed;
	}

	expected_len = sizeof(*cp) + uuid_count * 16;
	if (expected_len != len) {
		bt_dev_err(hdev, "service_discovery: expected %u bytes, got %u bytes",
			   expected_len, len);
		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_START_SERVICE_DISCOVERY,
					MGMT_STATUS_INVALID_PARAMS, &cp->type,
					sizeof(cp->type));
		goto failed;
	}

	if (!discovery_type_is_valid(hdev, cp->type, &status)) {
		err = mgmt_cmd_complete(sk, hdev->id,
					MGMT_OP_START_SERVICE_DISCOVERY,
					status, &cp->type, sizeof(cp->type));
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_START_SERVICE_DISCOVERY,
			       hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	cmd->cmd_complete = service_discovery_cmd_complete;

	/* Clear the discovery filter first to free any previously
	 * allocated memory for the UUID list.
	 */
	hci_discovery_filter_clear(hdev);

	hdev->discovery.result_filtering = true;
	hdev->discovery.type = cp->type;
	hdev->discovery.rssi = cp->rssi;
	hdev->discovery.uuid_count = uuid_count;

	if (uuid_count > 0) {
		hdev->discovery.uuids = kmemdup(cp->uuids, uuid_count * 16,
						GFP_KERNEL);
		if (!hdev->discovery.uuids) {
			err = mgmt_cmd_complete(sk, hdev->id,
						MGMT_OP_START_SERVICE_DISCOVERY,
						MGMT_STATUS_FAILED,
						&cp->type, sizeof(cp->type));
			mgmt_pending_remove(cmd);
			goto failed;
		}
	}

	hci_discovery_set_state(hdev, DISCOVERY_STARTING);
	queue_work(hdev->req_workqueue, &hdev->discov_update);
	err = 0;

failed:
	hci_dev_unlock(hdev);
	return err;
}

void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status %d", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_STOP_DISCOVERY, hdev);
	if (cmd) {
		cmd->cmd_complete(cmd, mgmt_status(status));
		mgmt_pending_remove(cmd);
	}

	hci_dev_unlock(hdev);

	/* Handle suspend notifier */
	if (test_and_clear_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks)) {
		bt_dev_dbg(hdev, "Paused discovery");
		wake_up(&hdev->suspend_wait_q);
	}
}

static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
			  u16 len)
{
	struct mgmt_cp_stop_discovery *mgmt_cp = data;
	struct mgmt_pending_cmd *cmd;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hci_discovery_active(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
					MGMT_STATUS_REJECTED, &mgmt_cp->type,
					sizeof(mgmt_cp->type));
		goto unlock;
	}

	if (hdev->discovery.type != mgmt_cp->type) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_STOP_DISCOVERY,
					MGMT_STATUS_INVALID_PARAMS,
					&mgmt_cp->type, sizeof(mgmt_cp->type));
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_STOP_DISCOVERY, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	cmd->cmd_complete = generic_cmd_complete;

	hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
	queue_work(hdev->req_workqueue, &hdev->discov_update);
	err = 0;

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int confirm_name(struct sock *sk, struct hci_dev *hdev, void *data,
			u16 len)
{
	struct mgmt_cp_confirm_name *cp = data;
	struct inquiry_entry *e;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	hci_dev_lock(hdev);

	if (!hci_discovery_active(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CONFIRM_NAME,
					MGMT_STATUS_FAILED, &cp->addr,
					sizeof(cp->addr));
		goto failed;
	}

	e = hci_inquiry_cache_lookup_unknown(hdev, &cp->addr.bdaddr);
	if (!e) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CONFIRM_NAME,
					MGMT_STATUS_INVALID_PARAMS, &cp->addr,
					sizeof(cp->addr));
		goto failed;
	}

	if (cp->name_known) {
		e->name_state = NAME_KNOWN;
		list_del(&e->list);
	} else {
		e->name_state = NAME_NEEDED;
		hci_inquiry_cache_update_resolve(hdev, e);
	}

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_CONFIRM_NAME, 0,
				&cp->addr, sizeof(cp->addr));

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int block_device(struct sock *sk, struct hci_dev *hdev, void *data,
			u16 len)
{
	struct mgmt_cp_block_device *cp = data;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!bdaddr_type_is_valid(cp->addr.type))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_BLOCK_DEVICE,
					 MGMT_STATUS_INVALID_PARAMS,
					 &cp->addr, sizeof(cp->addr));

	hci_dev_lock(hdev);

	err = hci_bdaddr_list_add(&hdev->blacklist, &cp->addr.bdaddr,
				  cp->addr.type);
	if (err < 0) {
		status = MGMT_STATUS_FAILED;
		goto done;
	}

	mgmt_event(MGMT_EV_DEVICE_BLOCKED, hdev, &cp->addr, sizeof(cp->addr),
		   sk);
	status = MGMT_STATUS_SUCCESS;

done:
	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_BLOCK_DEVICE, status,
				&cp->addr, sizeof(cp->addr));

	hci_dev_unlock(hdev);

	return err;
}

static int unblock_device(struct sock *sk, struct hci_dev *hdev, void *data,
			  u16 len)
{
	struct mgmt_cp_unblock_device *cp = data;
	u8 status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!bdaddr_type_is_valid(cp->addr.type))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNBLOCK_DEVICE,
					 MGMT_STATUS_INVALID_PARAMS,
					 &cp->addr, sizeof(cp->addr));

	hci_dev_lock(hdev);

	err = hci_bdaddr_list_del(&hdev->blacklist, &cp->addr.bdaddr,
				  cp->addr.type);
	if (err < 0) {
		status = MGMT_STATUS_INVALID_PARAMS;
		goto done;
	}

	mgmt_event(MGMT_EV_DEVICE_UNBLOCKED, hdev, &cp->addr, sizeof(cp->addr),
		   sk);
	status = MGMT_STATUS_SUCCESS;

done:
	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_UNBLOCK_DEVICE, status,
				&cp->addr, sizeof(cp->addr));

	hci_dev_unlock(hdev);

	return err;
}

static int set_device_id(struct sock *sk, struct hci_dev *hdev, void *data,
			 u16 len)
{
	struct mgmt_cp_set_device_id *cp = data;
	struct hci_request req;
	int err;
	__u16 source;

	bt_dev_dbg(hdev, "sock %p", sk);

	source = __le16_to_cpu(cp->source);

	if (source > 0x0002)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEVICE_ID,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	hdev->devid_source = source;
	hdev->devid_vendor = __le16_to_cpu(cp->vendor);
	hdev->devid_product = __le16_to_cpu(cp->product);
	hdev->devid_version = __le16_to_cpu(cp->version);

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEVICE_ID, 0,
				NULL, 0);

	hci_req_init(&req, hdev);
	__hci_req_update_eir(&req);
	hci_req_run(&req, NULL);

	hci_dev_unlock(hdev);

	return err;
}

static void enable_advertising_instance(struct hci_dev *hdev, u8 status,
					u16 opcode)
{
	bt_dev_dbg(hdev, "status %d", status);
}

static void set_advertising_complete(struct hci_dev *hdev, u8 status,
				     u16 opcode)
{
	struct cmd_lookup match = { NULL, hdev };
	struct hci_request req;
	u8 instance;
	struct adv_info *adv_instance;
	int err;

	hci_dev_lock(hdev);

	if (status) {
		u8 mgmt_err = mgmt_status(status);

		mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev,
				     cmd_status_rsp, &mgmt_err);
		goto unlock;
	}

	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
		hci_dev_set_flag(hdev, HCI_ADVERTISING);
	else
		hci_dev_clear_flag(hdev, HCI_ADVERTISING);

	mgmt_pending_foreach(MGMT_OP_SET_ADVERTISING, hdev, settings_rsp,
			     &match);

	new_settings(hdev, match.sk);

	if (match.sk)
		sock_put(match.sk);

	/* Handle suspend notifier */
	if (test_and_clear_bit(SUSPEND_PAUSE_ADVERTISING,
			       hdev->suspend_tasks)) {
		bt_dev_dbg(hdev, "Paused advertising");
		wake_up(&hdev->suspend_wait_q);
	} else if (test_and_clear_bit(SUSPEND_UNPAUSE_ADVERTISING,
				      hdev->suspend_tasks)) {
		bt_dev_dbg(hdev, "Unpaused advertising");
		wake_up(&hdev->suspend_wait_q);
	}

	/* If "Set Advertising" was just disabled and instance advertising was
	 * set up earlier, then re-enable multi-instance advertising.
	 */
	if (hci_dev_test_flag(hdev, HCI_ADVERTISING) ||
	    list_empty(&hdev->adv_instances))
		goto unlock;

	instance = hdev->cur_adv_instance;
	if (!instance) {
		adv_instance = list_first_entry_or_null(&hdev->adv_instances,
							struct adv_info, list);
		if (!adv_instance)
			goto unlock;

		instance = adv_instance->instance;
	}

	hci_req_init(&req, hdev);

	err = __hci_req_schedule_adv_instance(&req, instance, true);

	if (!err)
		err = hci_req_run(&req, enable_advertising_instance);

	if (err)
		bt_dev_err(hdev, "failed to re-configure advertising");

unlock:
	hci_dev_unlock(hdev);
}

static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
			   u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	u8 val, status;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	status = mgmt_le_support(hdev);
	if (status)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
				       status);

	/* Enabling the experimental LL Privay support disables support for
	 * advertising.
	 */
	if (hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
				       MGMT_STATUS_INVALID_PARAMS);

	if (hdev->advertising_paused)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
				       MGMT_STATUS_BUSY);

	hci_dev_lock(hdev);

	val = !!cp->val;

	/* The following conditions are ones which mean that we should
	 * not do any HCI communication but directly send a mgmt
	 * response to user space (after toggling the flag if
	 * necessary).
	 */
	if (!hdev_is_powered(hdev) ||
	    (val == hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
	     (cp->val == 0x02) == hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE)) ||
	    hci_conn_num(hdev, LE_LINK) > 0 ||
	    (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
	     hdev->le_scan_type == LE_SCAN_ACTIVE)) {
		bool changed;

		if (cp->val) {
			hdev->cur_adv_instance = 0x00;
			changed = !hci_dev_test_and_set_flag(hdev, HCI_ADVERTISING);
			if (cp->val == 0x02)
				hci_dev_set_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
			else
				hci_dev_clear_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
		} else {
			changed = hci_dev_test_and_clear_flag(hdev, HCI_ADVERTISING);
			hci_dev_clear_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_ADVERTISING, hdev);
		if (err < 0)
			goto unlock;

		if (changed)
			err = new_settings(hdev, sk);

		goto unlock;
	}

	if (pending_find(MGMT_OP_SET_ADVERTISING, hdev) ||
	    pending_find(MGMT_OP_SET_LE, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_ADVERTISING,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_ADVERTISING, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	hci_req_init(&req, hdev);

	if (cp->val == 0x02)
		hci_dev_set_flag(hdev, HCI_ADVERTISING_CONNECTABLE);
	else
		hci_dev_clear_flag(hdev, HCI_ADVERTISING_CONNECTABLE);

	cancel_adv_timeout(hdev);

	if (val) {
		/* Switch to instance "0" for the Set Advertising setting.
		 * We cannot use update_[adv|scan_rsp]_data() here as the
		 * HCI_ADVERTISING flag is not yet set.
		 */
		hdev->cur_adv_instance = 0x00;

		if (ext_adv_capable(hdev)) {
			__hci_req_start_ext_adv(&req, 0x00);
		} else {
			__hci_req_update_adv_data(&req, 0x00);
			__hci_req_update_scan_rsp_data(&req, 0x00);
			__hci_req_enable_advertising(&req);
		}
	} else {
		__hci_req_disable_advertising(&req);
	}

	err = hci_req_run(&req, set_advertising_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int set_static_address(struct sock *sk, struct hci_dev *hdev,
			      void *data, u16 len)
{
	struct mgmt_cp_set_static_address *cp = data;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_STATIC_ADDRESS,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (hdev_is_powered(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_STATIC_ADDRESS,
				       MGMT_STATUS_REJECTED);

	if (bacmp(&cp->bdaddr, BDADDR_ANY)) {
		if (!bacmp(&cp->bdaddr, BDADDR_NONE))
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_SET_STATIC_ADDRESS,
					       MGMT_STATUS_INVALID_PARAMS);

		/* Two most significant bits shall be set */
		if ((cp->bdaddr.b[5] & 0xc0) != 0xc0)
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_SET_STATIC_ADDRESS,
					       MGMT_STATUS_INVALID_PARAMS);
	}

	hci_dev_lock(hdev);

	bacpy(&hdev->static_addr, &cp->bdaddr);

	err = send_settings_rsp(sk, MGMT_OP_SET_STATIC_ADDRESS, hdev);
	if (err < 0)
		goto unlock;

	err = new_settings(hdev, sk);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int set_scan_params(struct sock *sk, struct hci_dev *hdev,
			   void *data, u16 len)
{
	struct mgmt_cp_set_scan_params *cp = data;
	__u16 interval, window;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
				       MGMT_STATUS_NOT_SUPPORTED);

	interval = __le16_to_cpu(cp->interval);

	if (interval < 0x0004 || interval > 0x4000)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
				       MGMT_STATUS_INVALID_PARAMS);

	window = __le16_to_cpu(cp->window);

	if (window < 0x0004 || window > 0x4000)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
				       MGMT_STATUS_INVALID_PARAMS);

	if (window > interval)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	hdev->le_scan_interval = interval;
	hdev->le_scan_window = window;

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS, 0,
				NULL, 0);

	/* If background scan is running, restart it so new parameters are
	 * loaded.
	 */
	if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
	    hdev->discovery.state == DISCOVERY_STOPPED) {
		struct hci_request req;

		hci_req_init(&req, hdev);

		hci_req_add_le_scan_disable(&req, false);
		hci_req_add_le_passive_scan(&req);

		hci_req_run(&req, NULL);
	}

	hci_dev_unlock(hdev);

	return err;
}

static void fast_connectable_complete(struct hci_dev *hdev, u8 status,
				      u16 opcode)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status 0x%02x", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_FAST_CONNECTABLE, hdev);
	if (!cmd)
		goto unlock;

	if (status) {
		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
			        mgmt_status(status));
	} else {
		struct mgmt_mode *cp = cmd->param;

		if (cp->val)
			hci_dev_set_flag(hdev, HCI_FAST_CONNECTABLE);
		else
			hci_dev_clear_flag(hdev, HCI_FAST_CONNECTABLE);

		send_settings_rsp(cmd->sk, MGMT_OP_SET_FAST_CONNECTABLE, hdev);
		new_settings(hdev, cmd->sk);
	}

	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int set_fast_connectable(struct sock *sk, struct hci_dev *hdev,
				void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) ||
	    hdev->hci_ver < BLUETOOTH_VER_1_2)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (pending_find(MGMT_OP_SET_FAST_CONNECTABLE, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	if (!!cp->val == hci_dev_test_flag(hdev, HCI_FAST_CONNECTABLE)) {
		err = send_settings_rsp(sk, MGMT_OP_SET_FAST_CONNECTABLE,
					hdev);
		goto unlock;
	}

	if (!hdev_is_powered(hdev)) {
		hci_dev_change_flag(hdev, HCI_FAST_CONNECTABLE);
		err = send_settings_rsp(sk, MGMT_OP_SET_FAST_CONNECTABLE,
					hdev);
		new_settings(hdev, sk);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_FAST_CONNECTABLE, hdev,
			       data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	hci_req_init(&req, hdev);

	__hci_req_write_fast_connectable(&req, cp->val);

	err = hci_req_run(&req, fast_connectable_complete);
	if (err < 0) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_FAST_CONNECTABLE,
				      MGMT_STATUS_FAILED);
		mgmt_pending_remove(cmd);
	}

unlock:
	hci_dev_unlock(hdev);

	return err;
}

static void set_bredr_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct mgmt_pending_cmd *cmd;

	bt_dev_dbg(hdev, "status 0x%02x", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_BREDR, hdev);
	if (!cmd)
		goto unlock;

	if (status) {
		u8 mgmt_err = mgmt_status(status);

		/* We need to restore the flag if related HCI commands
		 * failed.
		 */
		hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);

		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
	} else {
		send_settings_rsp(cmd->sk, MGMT_OP_SET_BREDR, hdev);
		new_settings(hdev, cmd->sk);
	}

	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int set_bredr(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_bredr_capable(hdev) || !lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
				       MGMT_STATUS_REJECTED);

	if (cp->val != 0x00 && cp->val != 0x01)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (cp->val == hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
		err = send_settings_rsp(sk, MGMT_OP_SET_BREDR, hdev);
		goto unlock;
	}

	if (!hdev_is_powered(hdev)) {
		if (!cp->val) {
			hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
			hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
			hci_dev_clear_flag(hdev, HCI_LINK_SECURITY);
			hci_dev_clear_flag(hdev, HCI_FAST_CONNECTABLE);
			hci_dev_clear_flag(hdev, HCI_HS_ENABLED);
		}

		hci_dev_change_flag(hdev, HCI_BREDR_ENABLED);

		err = send_settings_rsp(sk, MGMT_OP_SET_BREDR, hdev);
		if (err < 0)
			goto unlock;

		err = new_settings(hdev, sk);
		goto unlock;
	}

	/* Reject disabling when powered on */
	if (!cp->val) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
				      MGMT_STATUS_REJECTED);
		goto unlock;
	} else {
		/* When configuring a dual-mode controller to operate
		 * with LE only and using a static address, then switching
		 * BR/EDR back on is not allowed.
		 *
		 * Dual-mode controllers shall operate with the public
		 * address as its identity address for BR/EDR and LE. So
		 * reject the attempt to create an invalid configuration.
		 *
		 * The same restrictions applies when secure connections
		 * has been enabled. For BR/EDR this is a controller feature
		 * while for LE it is a host stack feature. This means that
		 * switching BR/EDR back on when secure connections has been
		 * enabled is not a supported transaction.
		 */
		if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
		    (bacmp(&hdev->static_addr, BDADDR_ANY) ||
		     hci_dev_test_flag(hdev, HCI_SC_ENABLED))) {
			err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
					      MGMT_STATUS_REJECTED);
			goto unlock;
		}
	}

	if (pending_find(MGMT_OP_SET_BREDR, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
				      MGMT_STATUS_BUSY);
		goto unlock;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_BREDR, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	/* We need to flip the bit already here so that
	 * hci_req_update_adv_data generates the correct flags.
	 */
	hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);

	hci_req_init(&req, hdev);

	__hci_req_write_fast_connectable(&req, false);
	__hci_req_update_scan(&req);

	/* Since only the advertising data flags will change, there
	 * is no need to update the scan response data.
	 */
	__hci_req_update_adv_data(&req, hdev->cur_adv_instance);

	err = hci_req_run(&req, set_bredr_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static void sc_enable_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct mgmt_pending_cmd *cmd;
	struct mgmt_mode *cp;

	bt_dev_dbg(hdev, "status %u", status);

	hci_dev_lock(hdev);

	cmd = pending_find(MGMT_OP_SET_SECURE_CONN, hdev);
	if (!cmd)
		goto unlock;

	if (status) {
		mgmt_cmd_status(cmd->sk, cmd->index, cmd->opcode,
			        mgmt_status(status));
		goto remove;
	}

	cp = cmd->param;

	switch (cp->val) {
	case 0x00:
		hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
		hci_dev_clear_flag(hdev, HCI_SC_ONLY);
		break;
	case 0x01:
		hci_dev_set_flag(hdev, HCI_SC_ENABLED);
		hci_dev_clear_flag(hdev, HCI_SC_ONLY);
		break;
	case 0x02:
		hci_dev_set_flag(hdev, HCI_SC_ENABLED);
		hci_dev_set_flag(hdev, HCI_SC_ONLY);
		break;
	}

	send_settings_rsp(cmd->sk, MGMT_OP_SET_SECURE_CONN, hdev);
	new_settings(hdev, cmd->sk);

remove:
	mgmt_pending_remove(cmd);
unlock:
	hci_dev_unlock(hdev);
}

static int set_secure_conn(struct sock *sk, struct hci_dev *hdev,
			   void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	u8 val;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_sc_capable(hdev) &&
	    !hci_dev_test_flag(hdev, HCI_LE_ENABLED))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
	    lmp_sc_capable(hdev) &&
	    !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
				       MGMT_STATUS_REJECTED);

	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
				  MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev) || !lmp_sc_capable(hdev) ||
	    !hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
		bool changed;

		if (cp->val) {
			changed = !hci_dev_test_and_set_flag(hdev,
							     HCI_SC_ENABLED);
			if (cp->val == 0x02)
				hci_dev_set_flag(hdev, HCI_SC_ONLY);
			else
				hci_dev_clear_flag(hdev, HCI_SC_ONLY);
		} else {
			changed = hci_dev_test_and_clear_flag(hdev,
							      HCI_SC_ENABLED);
			hci_dev_clear_flag(hdev, HCI_SC_ONLY);
		}

		err = send_settings_rsp(sk, MGMT_OP_SET_SECURE_CONN, hdev);
		if (err < 0)
			goto failed;

		if (changed)
			err = new_settings(hdev, sk);

		goto failed;
	}

	if (pending_find(MGMT_OP_SET_SECURE_CONN, hdev)) {
		err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_SECURE_CONN,
				      MGMT_STATUS_BUSY);
		goto failed;
	}

	val = !!cp->val;

	if (val == hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
	    (cp->val == 0x02) == hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
		err = send_settings_rsp(sk, MGMT_OP_SET_SECURE_CONN, hdev);
		goto failed;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_SET_SECURE_CONN, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto failed;
	}

	hci_req_init(&req, hdev);
	hci_req_add(&req, HCI_OP_WRITE_SC_SUPPORT, 1, &val);
	err = hci_req_run(&req, sc_enable_complete);
	if (err < 0) {
		mgmt_pending_remove(cmd);
		goto failed;
	}

failed:
	hci_dev_unlock(hdev);
	return err;
}

static int set_debug_keys(struct sock *sk, struct hci_dev *hdev,
			  void *data, u16 len)
{
	struct mgmt_mode *cp = data;
	bool changed, use_changed;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (cp->val != 0x00 && cp->val != 0x01 && cp->val != 0x02)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_DEBUG_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);

	hci_dev_lock(hdev);

	if (cp->val)
		changed = !hci_dev_test_and_set_flag(hdev, HCI_KEEP_DEBUG_KEYS);
	else
		changed = hci_dev_test_and_clear_flag(hdev,
						      HCI_KEEP_DEBUG_KEYS);

	if (cp->val == 0x02)
		use_changed = !hci_dev_test_and_set_flag(hdev,
							 HCI_USE_DEBUG_KEYS);
	else
		use_changed = hci_dev_test_and_clear_flag(hdev,
							  HCI_USE_DEBUG_KEYS);

	if (hdev_is_powered(hdev) && use_changed &&
	    hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
		u8 mode = (cp->val == 0x02) ? 0x01 : 0x00;
		hci_send_cmd(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE,
			     sizeof(mode), &mode);
	}

	err = send_settings_rsp(sk, MGMT_OP_SET_DEBUG_KEYS, hdev);
	if (err < 0)
		goto unlock;

	if (changed)
		err = new_settings(hdev, sk);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int set_privacy(struct sock *sk, struct hci_dev *hdev, void *cp_data,
		       u16 len)
{
	struct mgmt_cp_set_privacy *cp = cp_data;
	bool changed;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PRIVACY,
				       MGMT_STATUS_NOT_SUPPORTED);

	if (cp->privacy != 0x00 && cp->privacy != 0x01 && cp->privacy != 0x02)
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PRIVACY,
				       MGMT_STATUS_INVALID_PARAMS);

	if (hdev_is_powered(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_PRIVACY,
				       MGMT_STATUS_REJECTED);

	hci_dev_lock(hdev);

	/* If user space supports this command it is also expected to
	 * handle IRKs. Therefore, set the HCI_RPA_RESOLVING flag.
	 */
	hci_dev_set_flag(hdev, HCI_RPA_RESOLVING);

	if (cp->privacy) {
		changed = !hci_dev_test_and_set_flag(hdev, HCI_PRIVACY);
		memcpy(hdev->irk, cp->irk, sizeof(hdev->irk));
		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
		hci_adv_instances_set_rpa_expired(hdev, true);
		if (cp->privacy == 0x02)
			hci_dev_set_flag(hdev, HCI_LIMITED_PRIVACY);
		else
			hci_dev_clear_flag(hdev, HCI_LIMITED_PRIVACY);
	} else {
		changed = hci_dev_test_and_clear_flag(hdev, HCI_PRIVACY);
		memset(hdev->irk, 0, sizeof(hdev->irk));
		hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
		hci_adv_instances_set_rpa_expired(hdev, false);
		hci_dev_clear_flag(hdev, HCI_LIMITED_PRIVACY);
	}

	err = send_settings_rsp(sk, MGMT_OP_SET_PRIVACY, hdev);
	if (err < 0)
		goto unlock;

	if (changed)
		err = new_settings(hdev, sk);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static bool irk_is_valid(struct mgmt_irk_info *irk)
{
	switch (irk->addr.type) {
	case BDADDR_LE_PUBLIC:
		return true;

	case BDADDR_LE_RANDOM:
		/* Two most significant bits shall be set */
		if ((irk->addr.bdaddr.b[5] & 0xc0) != 0xc0)
			return false;
		return true;
	}

	return false;
}

static int load_irks(struct sock *sk, struct hci_dev *hdev, void *cp_data,
		     u16 len)
{
	struct mgmt_cp_load_irks *cp = cp_data;
	const u16 max_irk_count = ((U16_MAX - sizeof(*cp)) /
				   sizeof(struct mgmt_irk_info));
	u16 irk_count, expected_len;
	int i, err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_IRKS,
				       MGMT_STATUS_NOT_SUPPORTED);

	irk_count = __le16_to_cpu(cp->irk_count);
	if (irk_count > max_irk_count) {
		bt_dev_err(hdev, "load_irks: too big irk_count value %u",
			   irk_count);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_IRKS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	expected_len = struct_size(cp, irks, irk_count);
	if (expected_len != len) {
		bt_dev_err(hdev, "load_irks: expected %u bytes, got %u bytes",
			   expected_len, len);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_IRKS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	bt_dev_dbg(hdev, "irk_count %u", irk_count);

	for (i = 0; i < irk_count; i++) {
		struct mgmt_irk_info *key = &cp->irks[i];

		if (!irk_is_valid(key))
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_LOAD_IRKS,
					       MGMT_STATUS_INVALID_PARAMS);
	}

	hci_dev_lock(hdev);

	hci_smp_irks_clear(hdev);

	for (i = 0; i < irk_count; i++) {
		struct mgmt_irk_info *irk = &cp->irks[i];

		if (hci_is_blocked_key(hdev,
				       HCI_BLOCKED_KEY_TYPE_IRK,
				       irk->val)) {
			bt_dev_warn(hdev, "Skipping blocked IRK for %pMR",
				    &irk->addr.bdaddr);
			continue;
		}

		hci_add_irk(hdev, &irk->addr.bdaddr,
			    le_addr_type(irk->addr.type), irk->val,
			    BDADDR_ANY);
	}

	hci_dev_set_flag(hdev, HCI_RPA_RESOLVING);

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_IRKS, 0, NULL, 0);

	hci_dev_unlock(hdev);

	return err;
}

static bool ltk_is_valid(struct mgmt_ltk_info *key)
{
	if (key->master != 0x00 && key->master != 0x01)
		return false;

	switch (key->addr.type) {
	case BDADDR_LE_PUBLIC:
		return true;

	case BDADDR_LE_RANDOM:
		/* Two most significant bits shall be set */
		if ((key->addr.bdaddr.b[5] & 0xc0) != 0xc0)
			return false;
		return true;
	}

	return false;
}

static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
			       void *cp_data, u16 len)
{
	struct mgmt_cp_load_long_term_keys *cp = cp_data;
	const u16 max_key_count = ((U16_MAX - sizeof(*cp)) /
				   sizeof(struct mgmt_ltk_info));
	u16 key_count, expected_len;
	int i, err;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!lmp_le_capable(hdev))
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
				       MGMT_STATUS_NOT_SUPPORTED);

	key_count = __le16_to_cpu(cp->key_count);
	if (key_count > max_key_count) {
		bt_dev_err(hdev, "load_ltks: too big key_count value %u",
			   key_count);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	expected_len = struct_size(cp, keys, key_count);
	if (expected_len != len) {
		bt_dev_err(hdev, "load_keys: expected %u bytes, got %u bytes",
			   expected_len, len);
		return mgmt_cmd_status(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS,
				       MGMT_STATUS_INVALID_PARAMS);
	}

	bt_dev_dbg(hdev, "key_count %u", key_count);

	for (i = 0; i < key_count; i++) {
		struct mgmt_ltk_info *key = &cp->keys[i];

		if (!ltk_is_valid(key))
			return mgmt_cmd_status(sk, hdev->id,
					       MGMT_OP_LOAD_LONG_TERM_KEYS,
					       MGMT_STATUS_INVALID_PARAMS);
	}

	hci_dev_lock(hdev);

	hci_smp_ltks_clear(hdev);

	for (i = 0; i < key_count; i++) {
		struct mgmt_ltk_info *key = &cp->keys[i];
		u8 type, authenticated;

		if (hci_is_blocked_key(hdev,
				       HCI_BLOCKED_KEY_TYPE_LTK,
				       key->val)) {
			bt_dev_warn(hdev, "Skipping blocked LTK for %pMR",
				    &key->addr.bdaddr);
			continue;
		}

		switch (key->type) {
		case MGMT_LTK_UNAUTHENTICATED:
			authenticated = 0x00;
			type = key->master ? SMP_LTK : SMP_LTK_SLAVE;
			break;
		case MGMT_LTK_AUTHENTICATED:
			authenticated = 0x01;
			type = key->master ? SMP_LTK : SMP_LTK_SLAVE;
			break;
		case MGMT_LTK_P256_UNAUTH:
			authenticated = 0x00;
			type = SMP_LTK_P256;
			break;
		case MGMT_LTK_P256_AUTH:
			authenticated = 0x01;
			type = SMP_LTK_P256;
			break;
		case MGMT_LTK_P256_DEBUG:
			authenticated = 0x00;
			type = SMP_LTK_P256_DEBUG;
			fallthrough;
		default:
			continue;
		}

		hci_add_ltk(hdev, &key->addr.bdaddr,
			    le_addr_type(key->addr.type), type, authenticated,
			    key->val, key->enc_size, key->ediv, key->rand);
	}

	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS, 0,
			   NULL, 0);

	hci_dev_unlock(hdev);

	return err;
}

static int conn_info_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
{
	struct hci_conn *conn = cmd->user_data;
	struct mgmt_rp_get_conn_info rp;
	int err;

	memcpy(&rp.addr, cmd->param, sizeof(rp.addr));

	if (status == MGMT_STATUS_SUCCESS) {
		rp.rssi = conn->rssi;
		rp.tx_power = conn->tx_power;
		rp.max_tx_power = conn->max_tx_power;
	} else {
		rp.rssi = HCI_RSSI_INVALID;
		rp.tx_power = HCI_TX_POWER_INVALID;
		rp.max_tx_power = HCI_TX_POWER_INVALID;
	}

	err = mgmt_cmd_complete(cmd->sk, cmd->index, MGMT_OP_GET_CONN_INFO,
				status, &rp, sizeof(rp));

	hci_conn_drop(conn);
	hci_conn_put(conn);

	return err;
}

static void conn_info_refresh_complete(struct hci_dev *hdev, u8 hci_status,
				       u16 opcode)
{
	struct hci_cp_read_rssi *cp;
	struct mgmt_pending_cmd *cmd;
	struct hci_conn *conn;
	u16 handle;
	u8 status;

	bt_dev_dbg(hdev, "status 0x%02x", hci_status);

	hci_dev_lock(hdev);

	/* Commands sent in request are either Read RSSI or Read Transmit Power
	 * Level so we check which one was last sent to retrieve connection
	 * handle.  Both commands have handle as first parameter so it's safe to
	 * cast data on the same command struct.
	 *
	 * First command sent is always Read RSSI and we fail only if it fails.
	 * In other case we simply override error to indicate success as we
	 * already remembered if TX power value is actually valid.
	 */
	cp = hci_sent_cmd_data(hdev, HCI_OP_READ_RSSI);
	if (!cp) {
		cp = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
		status = MGMT_STATUS_SUCCESS;
	} else {
		status = mgmt_status(hci_status);
	}

	if (!cp) {
		bt_dev_err(hdev, "invalid sent_cmd in conn_info response");
		goto unlock;
	}

	handle = __le16_to_cpu(cp->handle);
	conn = hci_conn_hash_lookup_handle(hdev, handle);
	if (!conn) {
		bt_dev_err(hdev, "unknown handle (%d) in conn_info response",
			   handle);
		goto unlock;
	}

	cmd = pending_find_data(MGMT_OP_GET_CONN_INFO, hdev, conn);
	if (!cmd)
		goto unlock;

	cmd->cmd_complete(cmd, status);
	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
			 u16 len)
{
	struct mgmt_cp_get_conn_info *cp = data;
	struct mgmt_rp_get_conn_info rp;
	struct hci_conn *conn;
	unsigned long conn_info_age;
	int err = 0;

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&rp, 0, sizeof(rp));
	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
	rp.addr.type = cp->addr.type;

	if (!bdaddr_type_is_valid(cp->addr.type))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
					MGMT_STATUS_NOT_POWERED, &rp,
					sizeof(rp));
		goto unlock;
	}

	if (cp->addr.type == BDADDR_BREDR)
		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
					       &cp->addr.bdaddr);
	else
		conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, &cp->addr.bdaddr);

	if (!conn || conn->state != BT_CONNECTED) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
					MGMT_STATUS_NOT_CONNECTED, &rp,
					sizeof(rp));
		goto unlock;
	}

	if (pending_find_data(MGMT_OP_GET_CONN_INFO, hdev, conn)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
					MGMT_STATUS_BUSY, &rp, sizeof(rp));
		goto unlock;
	}

	/* To avoid client trying to guess when to poll again for information we
	 * calculate conn info age as random value between min/max set in hdev.
	 */
	conn_info_age = hdev->conn_info_min_age +
			prandom_u32_max(hdev->conn_info_max_age -
					hdev->conn_info_min_age);

	/* Query controller to refresh cached values if they are too old or were
	 * never read.
	 */
	if (time_after(jiffies, conn->conn_info_timestamp +
		       msecs_to_jiffies(conn_info_age)) ||
	    !conn->conn_info_timestamp) {
		struct hci_request req;
		struct hci_cp_read_tx_power req_txp_cp;
		struct hci_cp_read_rssi req_rssi_cp;
		struct mgmt_pending_cmd *cmd;

		hci_req_init(&req, hdev);
		req_rssi_cp.handle = cpu_to_le16(conn->handle);
		hci_req_add(&req, HCI_OP_READ_RSSI, sizeof(req_rssi_cp),
			    &req_rssi_cp);

		/* For LE links TX power does not change thus we don't need to
		 * query for it once value is known.
		 */
		if (!bdaddr_type_is_le(cp->addr.type) ||
		    conn->tx_power == HCI_TX_POWER_INVALID) {
			req_txp_cp.handle = cpu_to_le16(conn->handle);
			req_txp_cp.type = 0x00;
			hci_req_add(&req, HCI_OP_READ_TX_POWER,
				    sizeof(req_txp_cp), &req_txp_cp);
		}

		/* Max TX power needs to be read only once per connection */
		if (conn->max_tx_power == HCI_TX_POWER_INVALID) {
			req_txp_cp.handle = cpu_to_le16(conn->handle);
			req_txp_cp.type = 0x01;
			hci_req_add(&req, HCI_OP_READ_TX_POWER,
				    sizeof(req_txp_cp), &req_txp_cp);
		}

		err = hci_req_run(&req, conn_info_refresh_complete);
		if (err < 0)
			goto unlock;

		cmd = mgmt_pending_add(sk, MGMT_OP_GET_CONN_INFO, hdev,
				       data, len);
		if (!cmd) {
			err = -ENOMEM;
			goto unlock;
		}

		hci_conn_hold(conn);
		cmd->user_data = hci_conn_get(conn);
		cmd->cmd_complete = conn_info_cmd_complete;

		conn->conn_info_timestamp = jiffies;
	} else {
		/* Cache is valid, just reply with values cached in hci_conn */
		rp.rssi = conn->rssi;
		rp.tx_power = conn->tx_power;
		rp.max_tx_power = conn->max_tx_power;

		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
					MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
	}

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static int clock_info_cmd_complete(struct mgmt_pending_cmd *cmd, u8 status)
{
	struct hci_conn *conn = cmd->user_data;
	struct mgmt_rp_get_clock_info rp;
	struct hci_dev *hdev;
	int err;

	memset(&rp, 0, sizeof(rp));
	memcpy(&rp.addr, cmd->param, sizeof(rp.addr));

	if (status)
		goto complete;

	hdev = hci_dev_get(cmd->index);
	if (hdev) {
		rp.local_clock = cpu_to_le32(hdev->clock);
		hci_dev_put(hdev);
	}

	if (conn) {
		rp.piconet_clock = cpu_to_le32(conn->clock);
		rp.accuracy = cpu_to_le16(conn->clock_accuracy);
	}

complete:
	err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status, &rp,
				sizeof(rp));

	if (conn) {
		hci_conn_drop(conn);
		hci_conn_put(conn);
	}

	return err;
}

static void get_clock_info_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	struct hci_cp_read_clock *hci_cp;
	struct mgmt_pending_cmd *cmd;
	struct hci_conn *conn;

	bt_dev_dbg(hdev, "status %u", status);

	hci_dev_lock(hdev);

	hci_cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
	if (!hci_cp)
		goto unlock;

	if (hci_cp->which) {
		u16 handle = __le16_to_cpu(hci_cp->handle);
		conn = hci_conn_hash_lookup_handle(hdev, handle);
	} else {
		conn = NULL;
	}

	cmd = pending_find_data(MGMT_OP_GET_CLOCK_INFO, hdev, conn);
	if (!cmd)
		goto unlock;

	cmd->cmd_complete(cmd, mgmt_status(status));
	mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
}

static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data,
			 u16 len)
{
	struct mgmt_cp_get_clock_info *cp = data;
	struct mgmt_rp_get_clock_info rp;
	struct hci_cp_read_clock hci_cp;
	struct mgmt_pending_cmd *cmd;
	struct hci_request req;
	struct hci_conn *conn;
	int err;

	bt_dev_dbg(hdev, "sock %p", sk);

	memset(&rp, 0, sizeof(rp));
	bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
	rp.addr.type = cp->addr.type;

	if (cp->addr.type != BDADDR_BREDR)
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
					 MGMT_STATUS_INVALID_PARAMS,
					 &rp, sizeof(rp));

	hci_dev_lock(hdev);

	if (!hdev_is_powered(hdev)) {
		err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
					MGMT_STATUS_NOT_POWERED, &rp,
					sizeof(rp));
		goto unlock;
	}

	if (bacmp(&cp->addr.bdaddr, BDADDR_ANY)) {
		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
					       &cp->addr.bdaddr);
		if (!conn || conn->state != BT_CONNECTED) {
			err = mgmt_cmd_complete(sk, hdev->id,
						MGMT_OP_GET_CLOCK_INFO,
						MGMT_STATUS_NOT_CONNECTED,
						&rp, sizeof(rp));
			goto unlock;
		}
	} else {
		conn = NULL;
	}

	cmd = mgmt_pending_add(sk, MGMT_OP_GET_CLOCK_INFO, hdev, data, len);
	if (!cmd) {
		err = -ENOMEM;
		goto unlock;
	}

	cmd->cmd_complete = clock_info_cmd_complete;

	hci_req_init(&req, hdev);

	memset(&hci_cp, 0, sizeof(hci_cp));
	hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);

	if (conn) {
		hci_conn_hold(conn);
		cmd->user_data = hci_conn_get(conn);

		hci_cp.handle = cpu_to_le16(conn->handle);
		hci_cp.which = 0x01; /* Piconet clock */
		hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
	}

	err = hci_req_run(&req, get_clock_info_complete);
	if (err < 0)
		mgmt_pending_remove(cmd);

unlock:
	hci_dev_unlock(hdev);
	return err;
}

static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
{
	struct hci_conn *conn;

	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);
	if (!conn)
		return false;

	if (conn->dst_type != type)
		return false;

	if (conn->state != BT_CONNECTED)
		return false;

	return true;
}

/* This function requires the caller holds hdev->lock */
static int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr,
			       u8 addr_type, u8 auto_connect)
{
	struct hci_conn_params *params;

	params = hci_conn_params_add(hdev, addr, addr_type);
	if (!params)
		return -EIO;

	if (params->auto_connect == auto_connect)
		return 0;

	list_del_init(&params->action);

	switch (auto_connect) {
	case HCI_AUTO_CONN_DISABLED:
	case HCI_AUTO_CONN_LINK_LOSS:
		/* If auto connect is being disabled when we're trying to
		 * connect to device, keep connecting.
		 */
		if (params->explicit_connect)
			list_add(&params->action, &hdev->pend_le_conns);
		break;
	case HCI_AUTO_CONN_REPORT:
		if (params->explicit_connect)
			list_add(&params->action, &hdev->pend_le_conns);
		else
			list_add(&params->action, &hdev->pend_le_reports);
		break;
	case HCI_AUTO_CONN_DIRECT:
	case HCI_AUTO_CONN_ALWAYS:
		if (!is_connected(hdev, addr, addr_type))
			list_add(&params->action, &hdev->pend_le_conns);
		break;
	}

	params->auto_connect = auto_connect;

	bt_dev_dbg(hdev, "addr %pMR (type %u) auto_connect %u",
		   addr, addr_type, auto_connect);

	return 0;
}

static void device_added(struct sock *sk, struct hci_dev *hdev,
			 bdaddr_t *bdaddr, u8 type, u8 action)
{
	struct mgmt_ev_device_added ev;

	bacpy(&ev.addr.bdaddr, bdaddr);
	ev.addr.type = type;
	ev.action = action;

	mgmt_event(MGMT_EV_DEVICE_ADDED, hdev, &ev, sizeof(ev), sk);
}

static int add_device(struct sock *sk, struct hci_dev *hdev,
		      void *data, u16 len)
{
	struct mgmt_cp_add_device *cp = data;
	u8 auto_conn, addr_type;
	struct hci_conn_params *params;
	int err;
	u32 current_flags = 0;

	bt_dev_dbg(hdev, "sock %p", sk);

	if (!bdaddr_type_is_valid(cp->addr.type) ||
	    !bacmp(&cp->addr.bdaddr, BDADDR_ANY))
		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_A