Bluetooth: Move SREJ list to struct l2cap_chan

As part of moving all the Channel related operation to struct l2cap_chan.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

include/net/bluetooth/l2cap.h

@@ -277,6 +277,11 @@ struct l2cap_conn_param_update_rsp {
 #define L2CAP_CONN_PARAM_REJECTED	0x0001
 
 /* ----- L2CAP channels and connections ----- */
+struct srej_list {
+	__u8	tx_seq;
+	struct list_head list;
+};
+
 struct l2cap_chan {
 	struct sock *sk;
 	__u8		ident;
@@ -312,6 +317,7 @@ struct l2cap_chan {
 	struct sk_buff_head	srej_q;
 	struct sk_buff_head	busy_q;
 	struct work_struct	busy_work;
+	struct list_head	srej_l;
 
 	struct list_head list;
 };
@@ -350,12 +356,6 @@ struct l2cap_conn {
 /* ----- L2CAP socket info ----- */
 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk)
 #define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue)
-#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list)
-
-struct srej_list {
-	__u8	tx_seq;
-	struct list_head list;
-};
 
 struct l2cap_pinfo {
 	struct bt_sock	bt;
@@ -385,7 +385,6 @@ struct l2cap_pinfo {
 	__le16		sport;
 
 	struct sk_buff_head	tx_queue;
-	struct srej_list	srej_l;
 	struct l2cap_conn	*conn;
 	struct l2cap_chan	*chan;
 };

net/bluetooth/l2cap_core.c

@@ -252,7 +252,7 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
 		skb_queue_purge(&chan->srej_q);
 		skb_queue_purge(&chan->busy_q);
 
-		list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) {
+		list_for_each_entry_safe(l, tmp, &chan->srej_l, list) {
 			list_del(&l->list);
 			kfree(l);
 		}
@@ -1205,7 +1205,7 @@ static void l2cap_send_srejtail(struct l2cap_chan *chan)
 	control = L2CAP_SUPER_SELECT_REJECT;
 	control |= L2CAP_CTRL_FINAL;
 
-	tail = list_entry(SREJ_LIST(chan->sk)->prev, struct srej_list, list);
+	tail = list_entry((&chan->srej_l)->prev, struct srej_list, list);
 	control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
 
 	l2cap_send_sframe(chan, control);
@@ -1596,6 +1596,8 @@ static inline void l2cap_ertm_init(struct l2cap_chan *chan)
 	skb_queue_head_init(&chan->srej_q);
 	skb_queue_head_init(&chan->busy_q);
 
+	INIT_LIST_HEAD(&chan->srej_l);
+
 	INIT_WORK(&chan->busy_work, l2cap_busy_work);
 
 	sk->sk_backlog_rcv = l2cap_ertm_data_rcv;
@@ -3207,11 +3209,10 @@ static void l2cap_check_srej_gap(struct l2cap_chan *chan, u8 tx_seq)
 
 static void l2cap_resend_srejframe(struct l2cap_chan *chan, u8 tx_seq)
 {
-	struct sock *sk = chan->sk;
 	struct srej_list *l, *tmp;
 	u16 control;
 
-	list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) {
+	list_for_each_entry_safe(l, tmp, &chan->srej_l, list) {
 		if (l->tx_seq == tx_seq) {
 			list_del(&l->list);
 			kfree(l);
@@ -3221,13 +3222,12 @@ static void l2cap_resend_srejframe(struct l2cap_chan *chan, u8 tx_seq)
 		control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
 		l2cap_send_sframe(chan, control);
 		list_del(&l->list);
-		list_add_tail(&l->list, SREJ_LIST(sk));
+		list_add_tail(&l->list, &chan->srej_l);
 	}
 }
 
 static void l2cap_send_srejframe(struct l2cap_chan *chan, u8 tx_seq)
 {
-	struct sock *sk = chan->sk;
 	struct srej_list *new;
 	u16 control;
 
@@ -3239,7 +3239,7 @@ static void l2cap_send_srejframe(struct l2cap_chan *chan, u8 tx_seq)
 		new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC);
 		new->tx_seq = chan->expected_tx_seq;
 		chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64;
-		list_add_tail(&new->list, SREJ_LIST(sk));
+		list_add_tail(&new->list, &chan->srej_l);
 	}
 	chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64;
 }
@@ -3288,7 +3288,7 @@ static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u16 rx_cont
 	if (chan->conn_state & L2CAP_CONN_SREJ_SENT) {
 		struct srej_list *first;
 
-		first = list_first_entry(SREJ_LIST(sk),
+		first = list_first_entry(&chan->srej_l,
 				struct srej_list, list);
 		if (tx_seq == first->tx_seq) {
 			l2cap_add_to_srej_queue(chan, skb, tx_seq, sar);
@@ -3297,7 +3297,7 @@ static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u16 rx_cont
 			list_del(&first->list);
 			kfree(first);
 
-			if (list_empty(SREJ_LIST(sk))) {
+			if (list_empty(&chan->srej_l)) {
 				chan->buffer_seq = chan->buffer_seq_srej;
 				chan->conn_state &= ~L2CAP_CONN_SREJ_SENT;
 				l2cap_send_ack(chan);
@@ -3310,7 +3310,7 @@ static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u16 rx_cont
 			if (l2cap_add_to_srej_queue(chan, skb, tx_seq, sar) < 0)
 				goto drop;
 
-			list_for_each_entry(l, SREJ_LIST(sk), list) {
+			list_for_each_entry(l, &chan->srej_l, list) {
 				if (l->tx_seq == tx_seq) {
 					l2cap_resend_srejframe(chan, tx_seq);
 					return 0;
@@ -3332,7 +3332,7 @@ static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u16 rx_cont
 
 		BT_DBG("sk %p, Enter SREJ", sk);
 
-		INIT_LIST_HEAD(SREJ_LIST(sk));
+		INIT_LIST_HEAD(&chan->srej_l);
 		chan->buffer_seq_srej = chan->buffer_seq;
 
 		__skb_queue_head_init(&chan->srej_q);

net/bluetooth/l2cap_sock.c

@@ -1018,7 +1018,6 @@ void l2cap_sock_init(struct sock *sk, struct sock *parent)
 	/* Default config options */
 	pi->flush_to = L2CAP_DEFAULT_FLUSH_TO;
 	skb_queue_head_init(TX_QUEUE(sk));
-	INIT_LIST_HEAD(SREJ_LIST(sk));
 }
 
 static struct proto l2cap_proto = {