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Bluetooth: hci_core/mgmt: Introduce multi-adv list 

The current hci dev structure only supports a single advertising
instance. To support multi-instance advertising it is necessary to
introduce a linked list of advertising instances so that multiple
advertising instances can be dynamically added and/or removed.

In a first step, the existing adv_instance member of the hci_dev
struct is supplemented by a linked list of advertising instances.
This patch introduces the list and supporting list management
infrastructure. The list is not being used yet.

Signed-off-by: Florian Grandel <fgrandel@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Florian Grandel 2015-06-18 03:16:34 +02:00 committed by Marcel Holtmann
parent aebceccc18
commit d2609b345e
3 changed files with 135 additions and 1 deletions
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17
include/net/bluetooth/hci_core.h
View File

@ -157,15 +157,20 @@ struct oob_data {
struct adv_info {
struct delayed_work timeout_exp;
struct list_head list;
__u8 instance;
__u32 flags;
__u16 timeout;
__u16 duration;
__u16 adv_data_len;
__u8 adv_data[HCI_MAX_AD_LENGTH];
__u16 scan_rsp_len;
__u8 scan_rsp_data[HCI_MAX_AD_LENGTH];
};
#define HCI_MAX_ADV_INSTANCES 1
#define HCI_DEFAULT_ADV_DURATION 2
#define HCI_MAX_SHORT_NAME_LENGTH 10
/* Default LE RPA expiry time, 15 minutes */
@ -374,6 +379,9 @@ struct hci_dev {
__u8 scan_rsp_data_len;
struct adv_info adv_instance;
struct list_head adv_instances;
unsigned int adv_instance_cnt;
__u8 cur_adv_instance;
__u8 irk[16];
__u32 rpa_timeout;
@ -1019,6 +1027,15 @@ int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
u8 bdaddr_type);
void hci_adv_instances_clear(struct hci_dev *hdev);
struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
u16 adv_data_len, u8 *adv_data,
u16 scan_rsp_len, u8 *scan_rsp_data,
u16 timeout, u16 duration);
int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);

117
net/bluetooth/hci_core.c
View File

@ -2610,6 +2610,119 @@ int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
return 0;
}
/* This function requires the caller holds hdev->lock */
struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
{
struct adv_info *adv_instance;
list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
if (adv_instance->instance == instance)
return adv_instance;
}
return NULL;
}
/* This function requires the caller holds hdev->lock */
struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance) {
struct adv_info *cur_instance;
cur_instance = hci_find_adv_instance(hdev, instance);
if (!cur_instance)
return NULL;
if (cur_instance == list_last_entry(&hdev->adv_instances,
struct adv_info, list))
return list_first_entry(&hdev->adv_instances,
struct adv_info, list);
else
return list_next_entry(cur_instance, list);
}
/* This function requires the caller holds hdev->lock */
int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
{
struct adv_info *adv_instance;
adv_instance = hci_find_adv_instance(hdev, instance);
if (!adv_instance)
return -ENOENT;
BT_DBG("%s removing %dMR", hdev->name, instance);
list_del(&adv_instance->list);
kfree(adv_instance);
hdev->adv_instance_cnt--;
return 0;
}
/* This function requires the caller holds hdev->lock */
void hci_adv_instances_clear(struct hci_dev *hdev)
{
struct adv_info *adv_instance, *n;
list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
list_del(&adv_instance->list);
kfree(adv_instance);
}
hdev->adv_instance_cnt = 0;
}
/* This function requires the caller holds hdev->lock */
int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
u16 adv_data_len, u8 *adv_data,
u16 scan_rsp_len, u8 *scan_rsp_data,
u16 timeout, u16 duration)
{
struct adv_info *adv_instance;
adv_instance = hci_find_adv_instance(hdev, instance);
if (adv_instance) {
memset(adv_instance->adv_data, 0,
sizeof(adv_instance->adv_data));
memset(adv_instance->scan_rsp_data, 0,
sizeof(adv_instance->scan_rsp_data));
} else {
if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
return -EOVERFLOW;
adv_instance = kmalloc(sizeof(*adv_instance), GFP_KERNEL);
if (!adv_instance)
return -ENOMEM;
memset(adv_instance, 0, sizeof(*adv_instance));
adv_instance->instance = instance;
list_add(&adv_instance->list, &hdev->adv_instances);
hdev->adv_instance_cnt++;
}
adv_instance->flags = flags;
adv_instance->adv_data_len = adv_data_len;
adv_instance->scan_rsp_len = scan_rsp_len;
if (adv_data_len)
memcpy(adv_instance->adv_data, adv_data, adv_data_len);
if (scan_rsp_len)
memcpy(adv_instance->scan_rsp_data,
scan_rsp_data, scan_rsp_len);
adv_instance->timeout = timeout;
if (duration == 0)
adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
else
adv_instance->duration = duration;
BT_DBG("%s for %dMR", hdev->name, instance);
return 0;
}
struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
bdaddr_t *bdaddr, u8 type)
{
@ -3015,6 +3128,8 @@ struct hci_dev *hci_alloc_dev(void)
hdev->manufacturer = 0xffff; /* Default to internal use */
hdev->inq_tx_power = HCI_TX_POWER_INVALID;
hdev->adv_tx_power = HCI_TX_POWER_INVALID;
hdev->adv_instance_cnt = 0;
hdev->cur_adv_instance = 0x00;
hdev->sniff_max_interval = 800;
hdev->sniff_min_interval = 80;
@ -3056,6 +3171,7 @@ struct hci_dev *hci_alloc_dev(void)
INIT_LIST_HEAD(&hdev->pend_le_conns);
INIT_LIST_HEAD(&hdev->pend_le_reports);
INIT_LIST_HEAD(&hdev->conn_hash.list);
INIT_LIST_HEAD(&hdev->adv_instances);
INIT_WORK(&hdev->rx_work, hci_rx_work);
INIT_WORK(&hdev->cmd_work, hci_cmd_work);
@ -3249,6 +3365,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
hci_smp_ltks_clear(hdev);
hci_smp_irks_clear(hdev);
hci_remote_oob_data_clear(hdev);
hci_adv_instances_clear(hdev);
hci_bdaddr_list_clear(&hdev->le_white_list);
hci_conn_params_clear_all(hdev);
hci_discovery_filter_clear(hdev);

2
net/bluetooth/mgmt.c
View File

@ -6813,7 +6813,7 @@ static int read_adv_features(struct sock *sk, struct hci_dev *hdev,
rp->supported_flags = cpu_to_le32(supported_flags);
rp->max_adv_data_len = HCI_MAX_AD_LENGTH;
rp->max_scan_rsp_len = HCI_MAX_AD_LENGTH;
rp->max_instances = 1;
rp->max_instances = HCI_MAX_ADV_INSTANCES;
/* Currently only one instance is supported, so simply return the
* current instance number.