Bluetooth: make use sk_priority to priritize RFCOMM packets

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

2 files changed, 37 insertions, 16 deletions

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 3d35eba6d0cb..24bf96188cc5 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -65,7 +65,8 @@ static DEFINE_MUTEX(rfcomm_mutex);
 
 static LIST_HEAD(session_list);
 
-static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len);
+static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len,
+                                                        u32 priority);
 static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci);
 static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci);
 static int rfcomm_queue_disc(struct rfcomm_dlc *d);
@@ -747,19 +748,34 @@ void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *d
 }
 
 /* ---- RFCOMM frame sending ---- */
-static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len)
+static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len,
+                                                        u32 priority)
 {
         struct socket *sock = s->sock;
+        struct sock *sk = sock->sk;
         struct kvec iv = { data, len };
         struct msghdr msg;
 
-        BT_DBG("session %p len %d", s, len);
+        BT_DBG("session %p len %d priority %u", s, len, priority);
+
+        if (sk->sk_priority != priority) {
+                lock_sock(sk);
+                sk->sk_priority = priority;
+                release_sock(sk);
+        }
 
         memset(&msg, 0, sizeof(msg));
 
         return kernel_sendmsg(sock, &msg, &iv, 1, len);
 }
 
+static int rfcomm_send_cmd(struct rfcomm_session *s, struct rfcomm_cmd *cmd)
+{
+        BT_DBG("%p cmd %u", s, cmd->ctrl);
+
+        return rfcomm_send_frame(s, (void *) cmd, sizeof(*cmd), HCI_PRIO_MAX);
+}
+
 static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci)
 {
         struct rfcomm_cmd cmd;
@@ -771,7 +787,7 @@ static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci)
         cmd.len  = __len8(0);
         cmd.fcs  = __fcs2((u8 *) &cmd);
 
-        return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+        return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci)
@@ -785,7 +801,7 @@ static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci)
         cmd.len  = __len8(0);
         cmd.fcs  = __fcs2((u8 *) &cmd);
 
-        return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+        return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci)
@@ -799,7 +815,7 @@ static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci)
         cmd.len  = __len8(0);
         cmd.fcs  = __fcs2((u8 *) &cmd);
 
-        return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+        return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_queue_disc(struct rfcomm_dlc *d)
@@ -813,6 +829,8 @@ static int rfcomm_queue_disc(struct rfcomm_dlc *d)
         if (!skb)
                 return -ENOMEM;
 
+        skb->priority = HCI_PRIO_MAX;
+
         cmd = (void *) __skb_put(skb, sizeof(*cmd));
         cmd->addr = d->addr;
         cmd->ctrl = __ctrl(RFCOMM_DISC, 1);
@@ -835,7 +853,7 @@ static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci)
         cmd.len  = __len8(0);
         cmd.fcs  = __fcs2((u8 *) &cmd);
 
-        return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
+        return rfcomm_send_cmd(s, &cmd);
 }
 
 static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type)
@@ -860,7 +878,7 @@ static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type)
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d)
@@ -902,7 +920,7 @@ static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
@@ -940,7 +958,7 @@ int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status)
@@ -967,7 +985,7 @@ static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status)
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig)
@@ -994,7 +1012,7 @@ static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr)
@@ -1016,7 +1034,7 @@ static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr)
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static int rfcomm_send_fcon(struct rfcomm_session *s, int cr)
@@ -1038,7 +1056,7 @@ static int rfcomm_send_fcon(struct rfcomm_session *s, int cr)
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len)
@@ -1089,7 +1107,7 @@ static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits)
 
         *ptr = __fcs(buf); ptr++;
 
-        return rfcomm_send_frame(s, buf, ptr - buf);
+        return rfcomm_send_frame(s, buf, ptr - buf, HCI_PRIO_MAX);
 }
 
 static void rfcomm_make_uih(struct sk_buff *skb, u8 addr)
@@ -1767,7 +1785,8 @@ static inline int rfcomm_process_tx(struct rfcomm_dlc *d)
                 return skb_queue_len(&d->tx_queue);
 
         while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) {
-                err = rfcomm_send_frame(d->session, skb->data, skb->len);
+                err = rfcomm_send_frame(d->session, skb->data, skb->len,
+                                                        skb->priority);
                 if (err < 0) {
                         skb_queue_head(&d->tx_queue, skb);
                         break;
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 482722bbc7a0..40988e2dc8ef 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -597,6 +597,8 @@ static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
                         break;
                 }
 
+                skb->priority = sk->sk_priority;
+
                 err = rfcomm_dlc_send(d, skb);
                 if (err < 0) {
                         kfree_skb(skb);