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Bluetooth: Refactor L2CAP variables into l2cap_ctrl 

We're getting very close to the maximum possible size of bt_skb_cb. To
prepare to shrink the struct with the help of a union this patch moves
all L2CAP related variables into the l2cap_ctrl struct. To later add
other 'ctrl' structs the L2CAP one is renamed simple 'l2cap' instead
of 'control'.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2015-03-30 23:21:01 +03:00 committed by Marcel Holtmann
parent 20fa110a54
commit a4368ff3ed
4 changed files with 32 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/net/bluetooth/bluetooth.h
View File

@ -269,6 +269,9 @@ struct l2cap_ctrl {
__u16 reqseq;
__u16 txseq;
__u8 retries;
__le16 psm;
bdaddr_t bdaddr;
struct l2cap_chan *chan;
};
struct hci_dev;
@ -284,10 +287,7 @@ struct bt_skb_cb {
__u8 req_start:1;
u8 req_event;
hci_req_complete_t req_complete;
struct l2cap_chan *chan;
struct l2cap_ctrl control;
bdaddr_t bdaddr;
__le16 psm;
struct l2cap_ctrl l2cap;
};
#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))

48
net/bluetooth/l2cap_core.c
View File

@ -292,7 +292,7 @@ static struct sk_buff *l2cap_ertm_seq_in_queue(struct sk_buff_head *head,
struct sk_buff *skb;
skb_queue_walk(head, skb) {
if (bt_cb(skb)->control.txseq == seq)
if (bt_cb(skb)->l2cap.txseq == seq)
return skb;
}
@ -954,11 +954,11 @@ static inline void __unpack_control(struct l2cap_chan *chan,
{
if (test_bit(FLAG_EXT_CTRL, &chan->flags)) {
__unpack_extended_control(get_unaligned_le32(skb->data),
&bt_cb(skb)->control);
&bt_cb(skb)->l2cap);
skb_pull(skb, L2CAP_EXT_CTRL_SIZE);
} else {
__unpack_enhanced_control(get_unaligned_le16(skb->data),
&bt_cb(skb)->control);
&bt_cb(skb)->l2cap);
skb_pull(skb, L2CAP_ENH_CTRL_SIZE);
}
}
@ -1200,8 +1200,8 @@ static void l2cap_move_setup(struct l2cap_chan *chan)
chan->retry_count = 0;
skb_queue_walk(&chan->tx_q, skb) {
if (bt_cb(skb)->control.retries)
bt_cb(skb)->control.retries = 1;
if (bt_cb(skb)->l2cap.retries)
bt_cb(skb)->l2cap.retries = 1;
else
break;
}
@ -1846,8 +1846,8 @@ static void l2cap_streaming_send(struct l2cap_chan *chan,
skb = skb_dequeue(&chan->tx_q);
bt_cb(skb)->control.retries = 1;
control = &bt_cb(skb)->control;
bt_cb(skb)->l2cap.retries = 1;
control = &bt_cb(skb)->l2cap;
control->reqseq = 0;
control->txseq = chan->next_tx_seq;
@ -1891,8 +1891,8 @@ static int l2cap_ertm_send(struct l2cap_chan *chan)
skb = chan->tx_send_head;
bt_cb(skb)->control.retries = 1;
control = &bt_cb(skb)->control;
bt_cb(skb)->l2cap.retries = 1;
control = &bt_cb(skb)->l2cap;
if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state))
control->final = 1;
@ -1963,11 +1963,11 @@ static void l2cap_ertm_resend(struct l2cap_chan *chan)
continue;
}
bt_cb(skb)->control.retries++;
control = bt_cb(skb)->control;
bt_cb(skb)->l2cap.retries++;
control = bt_cb(skb)->l2cap;
if (chan->max_tx != 0 &&
bt_cb(skb)->control.retries > chan->max_tx) {
bt_cb(skb)->l2cap.retries > chan->max_tx) {
BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
l2cap_send_disconn_req(chan, ECONNRESET);
l2cap_seq_list_clear(&chan->retrans_list);
@ -2045,7 +2045,7 @@ static void l2cap_retransmit_all(struct l2cap_chan *chan,
if (chan->unacked_frames) {
skb_queue_walk(&chan->tx_q, skb) {
if (bt_cb(skb)->control.txseq == control->reqseq ||
if (bt_cb(skb)->l2cap.txseq == control->reqseq ||
skb == chan->tx_send_head)
break;
}
@ -2055,7 +2055,7 @@ static void l2cap_retransmit_all(struct l2cap_chan *chan,
break;
l2cap_seq_list_append(&chan->retrans_list,
bt_cb(skb)->control.txseq);
bt_cb(skb)->l2cap.txseq);
}
l2cap_ertm_resend(chan);
@ -2267,8 +2267,8 @@ static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan,
return ERR_PTR(err);
}
bt_cb(skb)->control.fcs = chan->fcs;
bt_cb(skb)->control.retries = 0;
bt_cb(skb)->l2cap.fcs = chan->fcs;
bt_cb(skb)->l2cap.retries = 0;
return skb;
}
@ -2321,7 +2321,7 @@ static int l2cap_segment_sdu(struct l2cap_chan *chan,
return PTR_ERR(skb);
}
bt_cb(skb)->control.sar = sar;
bt_cb(skb)->l2cap.sar = sar;
__skb_queue_tail(seg_queue, skb);
len -= pdu_len;
@ -2856,7 +2856,7 @@ static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb)
continue;
/* Don't send frame to the channel it came from */
if (bt_cb(skb)->chan == chan)
if (bt_cb(skb)->l2cap.chan == chan)
continue;
nskb = skb_clone(skb, GFP_KERNEL);
@ -5918,7 +5918,7 @@ static int l2cap_rx_queued_iframes(struct l2cap_chan *chan)
skb_unlink(skb, &chan->srej_q);
chan->buffer_seq = __next_seq(chan, chan->buffer_seq);
err = l2cap_reassemble_sdu(chan, skb, &bt_cb(skb)->control);
err = l2cap_reassemble_sdu(chan, skb, &bt_cb(skb)->l2cap);
if (err)
break;
}
@ -5952,7 +5952,7 @@ static void l2cap_handle_srej(struct l2cap_chan *chan,
return;
}
if (chan->max_tx != 0 && bt_cb(skb)->control.retries >= chan->max_tx) {
if (chan->max_tx != 0 && bt_cb(skb)->l2cap.retries >= chan->max_tx) {
BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
l2cap_send_disconn_req(chan, ECONNRESET);
return;
@ -6005,7 +6005,7 @@ static void l2cap_handle_rej(struct l2cap_chan *chan,
skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq);
if (chan->max_tx && skb &&
bt_cb(skb)->control.retries >= chan->max_tx) {
bt_cb(skb)->l2cap.retries >= chan->max_tx) {
BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
l2cap_send_disconn_req(chan, ECONNRESET);
return;
@ -6565,7 +6565,7 @@ static int l2cap_stream_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control,
static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
{
struct l2cap_ctrl *control = &bt_cb(skb)->control;
struct l2cap_ctrl *control = &bt_cb(skb)->l2cap;
u16 len;
u8 event;
@ -6864,8 +6864,8 @@ static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm,
goto drop;
/* Store remote BD_ADDR and PSM for msg_name */
bacpy(&bt_cb(skb)->bdaddr, &hcon->dst);
bt_cb(skb)->psm = psm;
bacpy(&bt_cb(skb)->l2cap.bdaddr, &hcon->dst);
bt_cb(skb)->l2cap.psm = psm;
if (!chan->ops->recv(chan, skb)) {
l2cap_chan_put(chan);

6
net/bluetooth/l2cap_sock.c
View File

@ -1330,7 +1330,7 @@ static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
skb->priority = sk->sk_priority;
bt_cb(skb)->chan = chan;
bt_cb(skb)->l2cap.chan = chan;
return skb;
}
@ -1444,8 +1444,8 @@ static void l2cap_skb_msg_name(struct sk_buff *skb, void *msg_name,
memset(la, 0, sizeof(struct sockaddr_l2));
la->l2_family = AF_BLUETOOTH;
la->l2_psm = bt_cb(skb)->psm;
bacpy(&la->l2_bdaddr, &bt_cb(skb)->bdaddr);
la->l2_psm = bt_cb(skb)->l2cap.psm;
bacpy(&la->l2_bdaddr, &bt_cb(skb)->l2cap.bdaddr);
*msg_namelen = sizeof(struct sockaddr_l2);
}

2
net/bluetooth/smp.c
View File

@ -3017,7 +3017,7 @@ static struct sk_buff *smp_alloc_skb_cb(struct l2cap_chan *chan,
return ERR_PTR(-ENOMEM);
skb->priority = HCI_PRIO_MAX;
bt_cb(skb)->chan = chan;
bt_cb(skb)->l2cap.chan = chan;
return skb;
}