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From:   Ankit Navik <ankit.p.navik@intel.com>
To:     linux-bluetooth@vger.kernel.org
Cc:     ankit.p.navik@intel.com
Subject: [PATCH v2] Bluetooth: Store periodic advertiser list size
Date:   Thu,  9 Jan 2020 23:26:39 +0530
Message-Id: <1578592599-9605-1-git-send-email-ankit.p.navik@intel.com>
Sender: linux-bluetooth-owner@vger.kernel.org
Precedence: bulk

When controller supports the Read LE Periodic Advertiser List Size feature,
the total number of list size are read and now stored.

Signed-off-by: Ankit Navik <ankit.p.navik@intel.com>
---
 include/net/bluetooth/hci.h      |  6 ++++++
 include/net/bluetooth/hci_core.h |  2 ++
 net/bluetooth/hci_core.c         |  8 ++++++++
 net/bluetooth/hci_debugfs.c      | 19 +++++++++++++++++++
 net/bluetooth/hci_event.c        | 18 ++++++++++++++++++
 5 files changed, 53 insertions(+)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index eccb6b2..3ef4bae 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1718,6 +1718,12 @@ struct hci_cp_le_set_adv_set_rand_addr {
 	bdaddr_t  bdaddr;
 } __packed;
 
+#define HCI_OP_LE_READ_PERIODIC_ADV_LIST_SIZE	0x204a
+struct hci_rp_le_read_periodic_adv_list_size {
+	__u8 status;
+	__u8 size;
+} __packed;
+
 #define HCI_OP_LE_READ_TX_POWER		0x204b
 struct hci_rp_le_read_tx_power {
 	__u8 status;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index f3d389d..5e847c6 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -239,6 +239,7 @@ struct hci_dev {
 	__u8		le_features[8];
 	__u8		le_white_list_size;
 	__u8		le_resolv_list_size;
+	__u8		le_periodic_adv_list_size;
 	__u8		le_num_of_adv_sets;
 	__u8		le_states[8];
 	__u8		commands[64];
@@ -394,6 +395,7 @@ struct hci_dev {
 	struct list_head	remote_oob_data;
 	struct list_head	le_white_list;
 	struct list_head	le_resolv_list;
+	struct list_head	le_periodic_adv_list;
 	struct list_head	le_conn_params;
 	struct list_head	pend_le_conns;
 	struct list_head	pend_le_reports;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9e19d5a..9f9262d 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -757,6 +757,12 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt)
 			hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
 		}
 
+		if (hdev->commands[44]& 0x40) {
+			/* Read LE periodic Advertiser List */
+			hci_req_add(req, HCI_OP_LE_READ_PERIODIC_ADV_LIST_SIZE,
+				    0, NULL);
+		}
+
 		if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
 			/* Read LE Maximum Data Length */
 			hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
@@ -3239,6 +3245,7 @@ struct hci_dev *hci_alloc_dev(void)
 	INIT_LIST_HEAD(&hdev->remote_oob_data);
 	INIT_LIST_HEAD(&hdev->le_white_list);
 	INIT_LIST_HEAD(&hdev->le_resolv_list);
+	INIT_LIST_HEAD(&hdev->le_periodic_adv_list);
 	INIT_LIST_HEAD(&hdev->le_conn_params);
 	INIT_LIST_HEAD(&hdev->pend_le_conns);
 	INIT_LIST_HEAD(&hdev->pend_le_reports);
@@ -3441,6 +3448,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
 	hci_adv_instances_clear(hdev);
 	hci_bdaddr_list_clear(&hdev->le_white_list);
 	hci_bdaddr_list_clear(&hdev->le_resolv_list);
+	hci_bdaddr_list_clear(&hdev->le_periodic_adv_list);
 	hci_conn_params_clear_all(hdev);
 	hci_discovery_filter_clear(hdev);
 	hci_dev_unlock(hdev);
diff --git a/net/bluetooth/hci_debugfs.c b/net/bluetooth/hci_debugfs.c
index 402e2cc..062fd25 100644
--- a/net/bluetooth/hci_debugfs.c
+++ b/net/bluetooth/hci_debugfs.c
@@ -740,6 +740,21 @@ static int resolv_list_show(struct seq_file *f, void *ptr)
 
 DEFINE_SHOW_ATTRIBUTE(resolv_list);
 
+static int periodic_adv_list_show(struct seq_file *f, void *ptr)
+{
+	struct hci_dev *hdev = f->private;
+	struct bdaddr_list *b;
+
+	hci_dev_lock(hdev);
+	list_for_each_entry(b, &hdev->le_periodic_adv_list, list)
+		seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
+	hci_dev_unlock(hdev);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(periodic_adv_list);
+
 static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
 {
 	struct hci_dev *hdev = f->private;
@@ -1034,6 +1049,10 @@ void hci_debugfs_create_le(struct hci_dev *hdev)
 			  &hdev->le_resolv_list_size);
 	debugfs_create_file("resolv_list", 0444, hdev->debugfs, hdev,
 			    &resolv_list_fops);
+	debugfs_create_u8("periodic_adv_list_size", 0444, hdev->debugfs,
+			  &hdev->le_periodic_adv_list_size);
+	debugfs_create_file("periodic_adv_list", 0444, hdev->debugfs, hdev,
+			    &periodic_adv_list_fops);
 	debugfs_create_file("identity_resolving_keys", 0400, hdev->debugfs,
 			    hdev, &identity_resolving_keys_fops);
 	debugfs_create_file("long_term_keys", 0400, hdev->debugfs, hdev,
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 3646f77..082a088 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -222,6 +222,7 @@ static void hci_cc_reset(struct hci_dev *hdev, struct sk_buff *skb)
 
 	hci_bdaddr_list_clear(&hdev->le_white_list);
 	hci_bdaddr_list_clear(&hdev->le_resolv_list);
+	hci_bdaddr_list_clear(&hdev->le_periodic_adv_list);
 }
 
 static void hci_cc_read_stored_link_key(struct hci_dev *hdev,
@@ -1720,6 +1721,19 @@ static void hci_cc_read_rssi(struct hci_dev *hdev, struct sk_buff *skb)
 	hci_dev_unlock(hdev);
 }
 
+static void hci_cc_le_read_periodic_adv_list_size(struct hci_dev *hdev,
+					   struct sk_buff *skb)
+{
+	struct hci_rp_le_read_periodic_adv_list_size *rp = (void *) skb->data;
+
+	BT_DBG("%s status 0x%2.2x size %u", hdev->name, rp->status, rp->size);
+
+	if (rp->status)
+		return;
+
+	hdev->le_periodic_adv_list_size = rp->size;
+}
+
 static void hci_cc_read_tx_power(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct hci_cp_read_tx_power *sent;
@@ -3427,6 +3441,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
 		hci_cc_le_read_max_data_len(hdev, skb);
 		break;
 
+	case HCI_OP_LE_READ_PERIODIC_ADV_LIST_SIZE:
+		hci_cc_le_read_periodic_adv_list_size(hdev, skb);
+		break;
+
 	case HCI_OP_LE_READ_TX_POWER:
 		hci_cc_le_read_tx_power(hdev, skb);
 		break;
-- 
2.7.4