[PATCH 1/3] Bluetooth: Remove unneeded mgmt_connectable function

[PATCH 1/3] Bluetooth: Remove unneeded mgmt_connectable function

[johan.hedberg]

From: Johan Hedberg <johan.hedberg@intel.com>

The mgmt_connectable function has been used to ensure that the right
actions to HCI_CONNECTABLE are taken when the HCI_Write_Scan_Enable
command is triggered by something else than mgmt. The only other user
that we really care about is the HCISETSCAN ioctl code, so we can
actually more simply perform the needed changes there instead.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---
 include/net/bluetooth/hci_core.h |  1 -
 net/bluetooth/hci_core.c         |  6 +++---
 net/bluetooth/hci_event.c        |  6 +-----
 net/bluetooth/mgmt.c             | 32 --------------------------------
 4 files changed, 4 insertions(+), 41 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index e69c2b08c0c6..76675c55be15 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1288,7 +1288,6 @@ void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
 int mgmt_powered(struct hci_dev *hdev, u8 powered);
 void mgmt_discoverable_timeout(struct hci_dev *hdev);
 void mgmt_discoverable(struct hci_dev *hdev, u8 discoverable);
-void mgmt_connectable(struct hci_dev *hdev, u8 connectable);
 void mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status);
 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
 		       bool persistent);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 84431b86af96..b6415ce7e7f5 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2717,9 +2717,9 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
 				   HCI_INIT_TIMEOUT);
 
 		/* Ensure that the connectable state gets correctly
-		 * notified if the whitelist is in use.
+		 * modified as this was a non-mgmt change.
 		 */
-		if (!err && !list_empty(&hdev->whitelist)) {
+		if (!err) {
 			bool changed;
 
 			if ((dr.dev_opt & SCAN_PAGE))
@@ -2729,7 +2729,7 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
 				changed = test_and_set_bit(HCI_CONNECTABLE,
 							   &hdev->dev_flags);
 
-			if (changed)
+			if (changed && test_bit(HCI_MGMT, &hdev->dev_flags))
 				mgmt_new_settings(hdev);
 		}
 		break;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index c8ae9ee3cb12..38a0e457eaf9 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -330,12 +330,8 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
 	} else if (old_iscan)
 		mgmt_discoverable(hdev, 0);
 
-	if (param & SCAN_PAGE) {
+	if (param & SCAN_PAGE)
 		set_bit(HCI_PSCAN, &hdev->flags);
-		if (!old_pscan)
-			mgmt_connectable(hdev, 1);
-	} else if (old_pscan)
-		mgmt_connectable(hdev, 0);
 
 done:
 	hci_dev_unlock(hdev);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 91b1f92c681e..a91f238f16c3 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -6068,38 +6068,6 @@ void mgmt_discoverable(struct hci_dev *hdev, u8 discoverable)
 	}
 }
 
-void mgmt_connectable(struct hci_dev *hdev, u8 connectable)
-{
-	bool changed;
-
-	/* Nothing needed here if there's a pending command since that
-	 * commands request completion callback takes care of everything
-	 * necessary.
-	 */
-	if (mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, hdev))
-		return;
-
-	/* Powering off may clear the scan mode - don't let that interfere */
-	if (!connectable && mgmt_pending_find(MGMT_OP_SET_POWERED, hdev))
-		return;
-
-	/* If something else than mgmt changed the page scan state we
-	 * can't differentiate this from a change triggered by adding
-	 * the first element to the whitelist. Therefore, avoid
-	 * incorrectly setting HCI_CONNECTABLE.
-	 */
-	if (connectable && !list_empty(&hdev->whitelist))
-		return;
-
-	if (connectable)
-		changed = !test_and_set_bit(HCI_CONNECTABLE, &hdev->dev_flags);
-	else
-		changed = test_and_clear_bit(HCI_CONNECTABLE, &hdev->dev_flags);
-
-	if (changed)
-		new_settings(hdev, NULL);
-}
-
 void mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status)
 {
 	u8 mgmt_err = mgmt_status(status);
-- 
1.9.3

[PATCH 2/3] Bluetooth: Remove unneeded mgmt_discoverable function

[johan.hedberg]

From: Johan Hedberg <johan.hedberg@intel.com>

Since the HCISETSCAN ioctl is the only non-mgmt user we care about for
setting the right discoverable state we can simply do the necessary
updates in the ioctl handler function instead. This then allows the
removal of the mgmt_discoverable function and should simplify that state
handling considerably.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---
 include/net/bluetooth/hci_core.h |  2 +-
 net/bluetooth/hci_core.c         | 35 +++++++++++++++++-----
 net/bluetooth/hci_event.c        | 19 ++++--------
 net/bluetooth/mgmt.c             | 64 +++++++++++++---------------------------
 4 files changed, 54 insertions(+), 66 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 76675c55be15..b65efb22be54 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1286,8 +1286,8 @@ void mgmt_index_added(struct hci_dev *hdev);
 void mgmt_index_removed(struct hci_dev *hdev);
 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
 int mgmt_powered(struct hci_dev *hdev, u8 powered);
+int mgmt_update_adv_data(struct hci_dev *hdev);
 void mgmt_discoverable_timeout(struct hci_dev *hdev);
-void mgmt_discoverable(struct hci_dev *hdev, u8 discoverable);
 void mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status);
 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
 		       bool persistent);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index b6415ce7e7f5..bb531fe650db 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2716,21 +2716,40 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
 		err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
 				   HCI_INIT_TIMEOUT);
 
-		/* Ensure that the connectable state gets correctly
-		 * modified as this was a non-mgmt change.
+		/* Ensure that the connectable and discoverable states
+		 * get correctly modified as this was a non-mgmt change.
 		 */
 		if (!err) {
-			bool changed;
+			bool cchg, dchg;
 
 			if ((dr.dev_opt & SCAN_PAGE))
-				changed = !test_and_set_bit(HCI_CONNECTABLE,
-							    &hdev->dev_flags);
+				cchg = !test_and_set_bit(HCI_CONNECTABLE,
+							&hdev->dev_flags);
 			else
-				changed = test_and_set_bit(HCI_CONNECTABLE,
-							   &hdev->dev_flags);
+				cchg = test_and_set_bit(HCI_CONNECTABLE,
+							&hdev->dev_flags);
+
+			if ((dr.dev_opt & SCAN_INQUIRY)) {
+				dchg = !test_and_set_bit(HCI_DISCOVERABLE,
+							&hdev->dev_flags);
+			} else {
+				clear_bit(HCI_LIMITED_DISCOVERABLE,
+					  &hdev->dev_flags);
+				dchg = test_and_set_bit(HCI_DISCOVERABLE,
+							&hdev->dev_flags);
+			}
+
+			if (!test_bit(HCI_MGMT, &hdev->dev_flags))
+				break;
 
-			if (changed && test_bit(HCI_MGMT, &hdev->dev_flags))
+			if (cchg || dchg) {
+				/* In case this was disabled through mgmt */
+				set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
+
+				if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
+					mgmt_update_adv_data(hdev);
 				mgmt_new_settings(hdev);
+			}
 		}
 		break;
 
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 38a0e457eaf9..760bbd88f3c5 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -296,7 +296,6 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	__u8 status = *((__u8 *) skb->data);
 	__u8 param;
-	int old_pscan, old_iscan;
 	void *sent;
 
 	BT_DBG("%s status 0x%2.2x", hdev->name, status);
@@ -315,23 +314,15 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
 		goto done;
 	}
 
-	/* We need to ensure that we set this back on if someone changed
-	 * the scan mode through a raw HCI socket.
-	 */
-	set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
-
-	old_pscan = test_and_clear_bit(HCI_PSCAN, &hdev->flags);
-	old_iscan = test_and_clear_bit(HCI_ISCAN, &hdev->flags);
-
-	if (param & SCAN_INQUIRY) {
+	if (param & SCAN_INQUIRY)
 		set_bit(HCI_ISCAN, &hdev->flags);
-		if (!old_iscan)
-			mgmt_discoverable(hdev, 1);
-	} else if (old_iscan)
-		mgmt_discoverable(hdev, 0);
+	else
+		clear_bit(HCI_ISCAN, &hdev->flags);
 
 	if (param & SCAN_PAGE)
 		set_bit(HCI_PSCAN, &hdev->flags);
+	else
+		clear_bit(HCI_ISCAN, &hdev->flags);
 
 done:
 	hci_dev_unlock(hdev);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index a91f238f16c3..ae9331b939ca 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -906,6 +906,16 @@ static void update_adv_data(struct hci_request *req)
 	hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
 }
 
+int mgmt_update_adv_data(struct hci_dev *hdev)
+{
+	struct hci_request req;
+
+	hci_req_init(&req, hdev);
+	update_adv_data(&req);
+
+	return hci_req_run(&req, NULL);
+}
+
 static void create_eir(struct hci_dev *hdev, u8 *data)
 {
 	u8 *ptr = data;
@@ -1743,7 +1753,7 @@ static void set_connectable_complete(struct hci_dev *hdev, u8 status)
 {
 	struct pending_cmd *cmd;
 	struct mgmt_mode *cp;
-	bool changed;
+	bool cchg, dchg;
 
 	BT_DBG("status 0x%02x", status);
 
@@ -1760,15 +1770,20 @@ static void set_connectable_complete(struct hci_dev *hdev, u8 status)
 	}
 
 	cp = cmd->param;
-	if (cp->val)
-		changed = !test_and_set_bit(HCI_CONNECTABLE, &hdev->dev_flags);
-	else
-		changed = test_and_clear_bit(HCI_CONNECTABLE, &hdev->dev_flags);
+	if (cp->val) {
+		cchg = !test_and_set_bit(HCI_CONNECTABLE, &hdev->dev_flags);
+		dchg = false;
+	} else {
+		cchg = test_and_clear_bit(HCI_CONNECTABLE, &hdev->dev_flags);
+		dchg = test_and_clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
+	}
 
 	send_settings_rsp(cmd->sk, MGMT_OP_SET_CONNECTABLE, hdev);
 
-	if (changed) {
+	if (cchg || dchg) {
 		new_settings(hdev, cmd->sk);
+		if (dchg)
+			mgmt_update_adv_data(hdev);
 		hci_update_background_scan(hdev);
 	}
 
@@ -6031,43 +6046,6 @@ void mgmt_discoverable_timeout(struct hci_dev *hdev)
 	hci_dev_unlock(hdev);
 }
 
-void mgmt_discoverable(struct hci_dev *hdev, u8 discoverable)
-{
-	bool changed;
-
-	/* Nothing needed here if there's a pending command since that
-	 * commands request completion callback takes care of everything
-	 * necessary.
-	 */
-	if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, hdev))
-		return;
-
-	/* Powering off may clear the scan mode - don't let that interfere */
-	if (!discoverable && mgmt_pending_find(MGMT_OP_SET_POWERED, hdev))
-		return;
-
-	if (discoverable) {
-		changed = !test_and_set_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
-	} else {
-		clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
-		changed = test_and_clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
-	}
-
-	if (changed) {
-		struct hci_request req;
-
-		/* In case this change in discoverable was triggered by
-		 * a disabling of connectable there could be a need to
-		 * update the advertising flags.
-		 */
-		hci_req_init(&req, hdev);
-		update_adv_data(&req);
-		hci_req_run(&req, NULL);
-
-		new_settings(hdev, NULL);
-	}
-}
-
 void mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status)
 {
 	u8 mgmt_err = mgmt_status(status);
-- 
1.9.3

[PATCH 3/3] Bluetooth: Remove unneeded mgmt_write_scan_failed function

[johan.hedberg]

From: Johan Hedberg <johan.hedberg@intel.com>

The Set Connectable/Discoverable mgmt handlers use a hci_request with a
proper callback to handle the HCI command sending. It makes therefore
little sense to have this extra function to be called from hci_event.c
for command failures.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---
 include/net/bluetooth/hci_core.h |  1 -
 net/bluetooth/hci_event.c        |  1 -
 net/bluetooth/mgmt.c             | 13 -------------
 3 files changed, 15 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index b65efb22be54..7e9e95633a85 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1288,7 +1288,6 @@ void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
 int mgmt_powered(struct hci_dev *hdev, u8 powered);
 int mgmt_update_adv_data(struct hci_dev *hdev);
 void mgmt_discoverable_timeout(struct hci_dev *hdev);
-void mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status);
 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
 		       bool persistent);
 void mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 760bbd88f3c5..a62e918d2641 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -309,7 +309,6 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
 	hci_dev_lock(hdev);
 
 	if (status) {
-		mgmt_write_scan_failed(hdev, param, status);
 		hdev->discov_timeout = 0;
 		goto done;
 	}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index ae9331b939ca..b49e6e711166 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -6046,19 +6046,6 @@ void mgmt_discoverable_timeout(struct hci_dev *hdev)
 	hci_dev_unlock(hdev);
 }
 
-void mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status)
-{
-	u8 mgmt_err = mgmt_status(status);
-
-	if (scan & SCAN_PAGE)
-		mgmt_pending_foreach(MGMT_OP_SET_CONNECTABLE, hdev,
-				     cmd_status_rsp, &mgmt_err);
-
-	if (scan & SCAN_INQUIRY)
-		mgmt_pending_foreach(MGMT_OP_SET_DISCOVERABLE, hdev,
-				     cmd_status_rsp, &mgmt_err);
-}
-
 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
 		       bool persistent)
 {
-- 
1.9.3