Bluetooth: Add store_hint parameter to mgmt_new_key

Even for keys that shouldn't be stored some use cases require the
knowledge of a new key having been created so that the conclusion of a
successful pairing can be made. Therefore, always send the mgmt_new_key
event but add a store_hint parameter to it to indicate to user space
whether the key should be stored or not.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

4 files changed, 16 insertions, 11 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 88c2cd92eaea..14cc3249c1eb 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -775,7 +775,7 @@ int mgmt_index_removed(u16 index);
 int mgmt_powered(u16 index, u8 powered);
 int mgmt_discoverable(u16 index, u8 discoverable);
 int mgmt_connectable(u16 index, u8 connectable);
-int mgmt_new_key(u16 index, struct link_key *key);
+int mgmt_new_key(u16 index, struct link_key *key, u8 persistent);
 int mgmt_connected(u16 index, bdaddr_t *bdaddr);
 int mgmt_disconnected(u16 index, bdaddr_t *bdaddr);
 int mgmt_disconnect_failed(u16 index);
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 353a85dc2de0..4899286ed4e4 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -230,6 +230,7 @@ struct mgmt_ev_controller_error {
 
 #define MGMT_EV_NEW_KEY                 0x000A
 struct mgmt_ev_new_key {
+        __u8 store_hint;
         struct mgmt_key_info key;
 } __packed;
 
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 60260cae3a04..b6bda3fac10e 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1062,7 +1062,7 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
                                 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
 {
         struct link_key *key, *old_key;
-        u8 old_key_type;
+        u8 old_key_type, persistent;
 
         old_key = hci_find_link_key(hdev, bdaddr);
         if (old_key) {
@@ -1089,12 +1089,6 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
                         conn->key_type = type;
         }
 
-        if (new_key && !hci_persistent_key(hdev, conn, type, old_key_type)) {
-                list_del(&key->list);
-                kfree(key);
-                return 0;
-        }
-
         bacpy(&key->bdaddr, bdaddr);
         memcpy(key->val, val, 16);
         key->pin_len = pin_len;
@@ -1104,8 +1098,17 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
         else
                 key->type = type;
 
-        if (new_key)
-                mgmt_new_key(hdev->id, key);
+        if (!new_key)
+                return 0;
+
+        persistent = hci_persistent_key(hdev, conn, type, old_key_type);
+
+        mgmt_new_key(hdev->id, key, persistent);
+
+        if (!persistent) {
+                list_del(&key->list);
+                kfree(key);
+        }
 
         return 0;
 }
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 232ea8bfff19..2481d257ed98 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1858,12 +1858,13 @@ int mgmt_connectable(u16 index, u8 connectable)
         return ret;
 }
 
-int mgmt_new_key(u16 index, struct link_key *key)
+int mgmt_new_key(u16 index, struct link_key *key, u8 persistent)
 {
         struct mgmt_ev_new_key ev;
 
         memset(&ev, 0, sizeof(ev));
 
+        ev.store_hint = persistent;
         bacpy(&ev.key.bdaddr, &key->bdaddr);
         ev.key.type = key->type;
         memcpy(ev.key.val, key->val, 16);