Bluetooth: Introduce helper functions for socket cookie handling

Instead of manually allocating cookie information each time, use helper
functions for generating and releasing cookies.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index d37c2243157bc49848b850b1341d9a481c5dee5b..804208d483689785f3d9b024970cc6b9797daef4 100644 (file)
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -84,6 +84,33 @@ u32 hci_sock_get_cookie(struct sock *sk)
        return hci_pi(sk)->cookie;
 }
 
+static bool hci_sock_gen_cookie(struct sock *sk)
+{
+       int id = hci_pi(sk)->cookie;
+
+       if (!id) {
+               id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
+               if (id < 0)
+                       id = 0xffffffff;
+
+               hci_pi(sk)->cookie = id;
+               get_task_comm(hci_pi(sk)->comm, current);
+               return true;
+       }
+
+       return false;
+}
+
+static void hci_sock_free_cookie(struct sock *sk)
+{
+       int id = hci_pi(sk)->cookie;
+
+       if (id) {
+               hci_pi(sk)->cookie = 0xffffffff;
+               ida_simple_remove(&sock_cookie_ida, id);
+       }
+}
+
 static inline int hci_test_bit(int nr, const void *addr)
 {
        return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
@@ -753,7 +780,6 @@ static int hci_sock_release(struct socket *sock)
        struct sock *sk = sock->sk;
        struct hci_dev *hdev;
        struct sk_buff *skb;
-       int id;
 
        BT_DBG("sock %p sk %p", sock, sk);
 
@@ -767,8 +793,6 @@ static int hci_sock_release(struct socket *sock)
                atomic_dec(&monitor_promisc);
                break;
        case HCI_CHANNEL_CONTROL:
-               id = hci_pi(sk)->cookie;
-
                /* Send event to monitor */
                skb = create_monitor_ctrl_close(sk);
                if (skb) {
@@ -777,8 +801,7 @@ static int hci_sock_release(struct socket *sock)
                        kfree_skb(skb);
                }
 
-               hci_pi(sk)->cookie = 0xffffffff;
-               ida_simple_remove(&sock_cookie_ida, id);
+               hci_sock_free_cookie(sk);
                break;
        }
 
@@ -1145,14 +1168,8 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
                 */
                if (haddr.hci_channel == HCI_CHANNEL_CONTROL) {
                        struct sk_buff *skb;
-                       int id;
-
-                       id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
-                       if (id < 0)
-                               id = 0xffffffff;
 
-                       hci_pi(sk)->cookie = id;
-                       get_task_comm(hci_pi(sk)->comm, current);
+                       hci_sock_gen_cookie(sk);
 
                        /* Send event to monitor */
                        skb = create_monitor_ctrl_open(sk);