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@xxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 15 ++++++
net/bluetooth/hci_core.c | 111 +++++++++++++++++++++++++++++++++++++++
net/bluetooth/mgmt.c | 10 ++--
3 files changed, 131 insertions(+), 5 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a056c2b..d92d324 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -156,6 +156,8 @@ struct oob_data {
};
struct adv_info {
+ struct list_head list;
+ struct hci_dev *hdev;
struct delayed_work timeout_exp;
__u8 instance;
__u32 flags;
@@ -166,6 +168,8 @@ struct adv_info {
__u8 scan_rsp_data[HCI_MAX_AD_LENGTH];
};
+#define HCI_MAX_ADV_INSTANCES 1
+
#define HCI_MAX_SHORT_NAME_LENGTH 10
/* Default LE RPA expiry time, 15 minutes */
@@ -374,6 +378,9 @@ 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;
@@ -1007,6 +1014,14 @@ 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);
+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,
+ work_func_t timeout_work, u16 timeout);
+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);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index db11b9d..1ec557f 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2609,6 +2609,113 @@ 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 */
+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);
+
+ if (adv_instance->timeout)
+ cancel_delayed_work(&adv_instance->timeout_exp);
+
+ 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) {
+ if (adv_instance->timeout)
+ cancel_delayed_work(&adv_instance->timeout_exp);
+
+ 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,
+ work_func_t timeout_work, u16 timeout)
+{
+ struct adv_info *adv_instance;
+
+ adv_instance = hci_find_adv_instance(hdev, instance);
+ if (adv_instance) {
+ if (adv_instance->timeout)
+ cancel_delayed_work(&adv_instance->timeout_exp);
+
+ 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)
+ return -EOVERFLOW;
+
+ adv_instance = kmalloc(sizeof(*adv_instance), GFP_KERNEL);
+ if (!adv_instance)
+ return -ENOMEM;
+
+ memset(adv_instance, 0, sizeof(*adv_instance));
+ adv_instance->hdev = hdev;
+ INIT_DELAYED_WORK(&adv_instance->timeout_exp, timeout_work);
+ 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 (timeout)
+ queue_delayed_work(hdev->workqueue,
+ &adv_instance->timeout_exp,
+ msecs_to_jiffies(timeout * 1000));
+
+ 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)
{
@@ -3012,6 +3119,8 @@ 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;
@@ -3053,6 +3162,7 @@ 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);
@@ -3246,6 +3356,7 @@ 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);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 7fd87e7..ce25b6d 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -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.
@@ -6916,11 +6916,11 @@ unlock:
static void adv_timeout_expired(struct work_struct *work)
{
- struct hci_dev *hdev = container_of(work, struct hci_dev,
- adv_instance.timeout_exp.work);
-
- hdev->adv_instance.timeout = 0;
+ struct adv_info *adv_instance = container_of(work, struct adv_info,
+ timeout_exp.work);
+ struct hci_dev *hdev = adv_instance->hdev;
+ adv_instance->timeout = 0;
hci_dev_lock(hdev);
clear_adv_instance(hdev);
hci_dev_unlock(hdev);
--
1.9.1
--
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