Bluetooth: Add mgmt events for blacklisting

Add management interface events for blocking/unblocking a device.
Sender of the block device command gets cmd complete and other
mgmt sockets get the event. Event is also sent to mgmt sockets when
blocking is done with ioctl, e.g when blocking a device with
hciconfig. This makes it possible for bluetoothd to track status
of blocked devices when a third party block or unblocks a device.

Event sending is handled in mgmt_device_blocked function which gets
called from hci_blacklist_add in hci_core.c. A pending command is
added in mgmt_block_device, so that it can found when sending the
event - the event is not sent to the socket from which the pending
command came. Locks were moved out from hci_core.c to hci_sock.c
and mgmt.c, because locking is needed also for mgmt_pending_add in
mgmt.c.

Signed-off-by: Antti Julku <antti.julku@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 56 insertions, 6 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 6493e807634f..579f7261a7fe 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1698,13 +1698,12 @@ static int block_device(struct sock *sk, u16 index, unsigned char *data,
                                                                 u16 len)
 {
         struct hci_dev *hdev;
-        struct mgmt_cp_block_device *cp;
+        struct pending_cmd *cmd;
+        struct mgmt_cp_block_device *cp = (void *) data;
         int err;
 
         BT_DBG("hci%u", index);
 
-        cp = (void *) data;
-
         if (len != sizeof(*cp))
                 return cmd_status(sk, index, MGMT_OP_BLOCK_DEVICE,
                                                         EINVAL);
@@ -1714,6 +1713,14 @@ static int block_device(struct sock *sk, u16 index, unsigned char *data,
                 return cmd_status(sk, index, MGMT_OP_BLOCK_DEVICE,
                                                         ENODEV);
 
+        hci_dev_lock_bh(hdev);
+
+        cmd = mgmt_pending_add(sk, MGMT_OP_BLOCK_DEVICE, index, NULL, 0);
+        if (!cmd) {
+                err = -ENOMEM;
+                goto failed;
+        }
+
         err = hci_blacklist_add(hdev, &cp->bdaddr);
 
         if (err < 0)
@@ -1721,6 +1728,11 @@ static int block_device(struct sock *sk, u16 index, unsigned char *data,
         else
                 err = cmd_complete(sk, index, MGMT_OP_BLOCK_DEVICE,
                                                         NULL, 0);
+
+        mgmt_pending_remove(cmd);
+
+failed:
+        hci_dev_unlock_bh(hdev);
         hci_dev_put(hdev);
 
         return err;
@@ -1730,13 +1742,12 @@ static int unblock_device(struct sock *sk, u16 index, unsigned char *data,
                                                                 u16 len)
 {
         struct hci_dev *hdev;
-        struct mgmt_cp_unblock_device *cp;
+        struct pending_cmd *cmd;
+        struct mgmt_cp_unblock_device *cp = (void *) data;
         int err;
 
         BT_DBG("hci%u", index);
 
-        cp = (void *) data;
-
         if (len != sizeof(*cp))
                 return cmd_status(sk, index, MGMT_OP_UNBLOCK_DEVICE,
                                                                 EINVAL);
@@ -1746,6 +1757,14 @@ static int unblock_device(struct sock *sk, u16 index, unsigned char *data,
                 return cmd_status(sk, index, MGMT_OP_UNBLOCK_DEVICE,
                                                                 ENODEV);
 
+        hci_dev_lock_bh(hdev);
+
+        cmd = mgmt_pending_add(sk, MGMT_OP_UNBLOCK_DEVICE, index, NULL, 0);
+        if (!cmd) {
+                err = -ENOMEM;
+                goto failed;
+        }
+
         err = hci_blacklist_del(hdev, &cp->bdaddr);
 
         if (err < 0)
@@ -1753,6 +1772,11 @@ static int unblock_device(struct sock *sk, u16 index, unsigned char *data,
         else
                 err = cmd_complete(sk, index, MGMT_OP_UNBLOCK_DEVICE,
                                                                 NULL, 0);
+
+        mgmt_pending_remove(cmd);
+
+failed:
+        hci_dev_unlock_bh(hdev);
         hci_dev_put(hdev);
 
         return err;
@@ -2356,3 +2380,29 @@ int mgmt_discovering(u16 index, u8 discovering)
         return mgmt_event(MGMT_EV_DISCOVERING, index, &discovering,
                                                 sizeof(discovering), NULL);
 }
+
+int mgmt_device_blocked(u16 index, bdaddr_t *bdaddr)
+{
+        struct pending_cmd *cmd;
+        struct mgmt_ev_device_blocked ev;
+
+        cmd = mgmt_pending_find(MGMT_OP_BLOCK_DEVICE, index);
+
+        bacpy(&ev.bdaddr, bdaddr);
+
+        return mgmt_event(MGMT_EV_DEVICE_BLOCKED, index, &ev, sizeof(ev),
+                                                cmd ? cmd->sk : NULL);
+}
+
+int mgmt_device_unblocked(u16 index, bdaddr_t *bdaddr)
+{
+        struct pending_cmd *cmd;
+        struct mgmt_ev_device_unblocked ev;
+
+        cmd = mgmt_pending_find(MGMT_OP_UNBLOCK_DEVICE, index);
+
+        bacpy(&ev.bdaddr, bdaddr);
+
+        return mgmt_event(MGMT_EV_DEVICE_UNBLOCKED, index, &ev, sizeof(ev),
+                                                cmd ? cmd->sk : NULL);
+}