An L2CAP channel using high speed continues to be associated with a
BR/EDR l2cap_conn, while also tracking an additional hci_conn
(representing a physical link on a high speed controller) and hci_chan
(representing a logical link). There may only be one physical link
between two high speed controllers. Each physical link may contain
several logical links, with each logical link representing a channel
with specific quality of service.
During a channel move, the destination channel id, current move state,
and role (initiator vs. responder) are tracked and used by the channel
move state machine. The ident value associated with a move request
must also be stored in order to use it in later move responses.
The active channel is stored in chan_id.
Signed-off-by: Mat Martineau <mathewm@xxxxxxxxxxxxxx>
---
include/net/bluetooth/l2cap.h | 30 ++++++++++++++++++++++++++++++
net/bluetooth/l2cap_core.c | 6 ++++++
2 files changed, 36 insertions(+)
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index d206296..c585def 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -433,6 +433,8 @@ struct l2cap_chan {
struct sock *sk;
struct l2cap_conn *conn;
+ struct hci_conn *hs_hcon;
+ struct hci_chan *hs_hchan;
__u8 state;
@@ -477,6 +479,12 @@ struct l2cap_chan {
unsigned long conn_state;
unsigned long flags;
+ __u8 chan_id;
+ __u8 move_id;
+ __u8 move_state;
+ __u8 move_role;
+ __u8 move_cmd_ident;
+
__u16 next_tx_seq;
__u16 expected_ack_seq;
__u16 expected_tx_seq;
@@ -641,6 +649,9 @@ enum {
enum {
L2CAP_RX_STATE_RECV,
L2CAP_RX_STATE_SREJ_SENT,
+ L2CAP_RX_STATE_MOVE,
+ L2CAP_RX_STATE_WAIT_P,
+ L2CAP_RX_STATE_WAIT_F,
};
enum {
@@ -671,6 +682,25 @@ enum {
L2CAP_EV_RECV_FRAME,
};
+enum {
+ L2CAP_MOVE_ROLE_NONE,
+ L2CAP_MOVE_ROLE_INITIATOR,
+ L2CAP_MOVE_ROLE_RESPONDER,
+};
+
+enum {
+ L2CAP_MOVE_STABLE,
+ L2CAP_MOVE_WAIT_REQ,
+ L2CAP_MOVE_WAIT_RSP,
+ L2CAP_MOVE_WAIT_RSP_SUCCESS,
+ L2CAP_MOVE_WAIT_CONFIRM,
+ L2CAP_MOVE_WAIT_CONFIRM_RSP,
+ L2CAP_MOVE_WAIT_LOGICAL_COMP,
+ L2CAP_MOVE_WAIT_LOGICAL_CFM,
+ L2CAP_MOVE_WAIT_LOCAL_BUSY,
+ L2CAP_MOVE_WAIT_PREPARE,
+};
+
void l2cap_chan_hold(struct l2cap_chan *c);
void l2cap_chan_put(struct l2cap_chan *c);
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 9f8b29e..fd9a349 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -2746,6 +2746,12 @@ int l2cap_ertm_init(struct l2cap_chan *chan)
skb_queue_head_init(&chan->tx_q);
+ chan->chan_id = 0;
+ chan->move_id = 0;
+ chan->move_state = L2CAP_MOVE_STABLE;
+ chan->move_role = L2CAP_MOVE_ROLE_NONE;
+ chan->move_cmd_ident = 0;
+
if (chan->mode != L2CAP_MODE_ERTM)
return 0;
--
1.7.11.2
--
Mat Martineau
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
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