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Bluetooth: Add logical link confirm

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The logical link confirm callback is executed when the AMP controller
completes its logical link setup.  During a channel move, a newly
formed logical link allows a move responder to send a move channel
response.  A move initiator will send a move channel confirm.  A
failed logical link will end the channel move and send an appropriate
response or confirm command indicating a failure.

If the channel is being created on an AMP controller, L2CAP
configuration is completed after the logical link is set up.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Mat Martineau 2012-10-23 15:24:15 -07:00 committed by Gustavo Padovan
parent 5b155ef960
commit 1500109bbc
1 changed files with 123 additions and 11 deletions
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134
net/bluetooth/l2cap_core.c
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@ -3787,6 +3787,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn,
goto unlock;
}
chan->ident = cmd->ident;
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
chan->num_conf_rsp++;
@ -4186,17 +4187,17 @@ static int l2cap_create_channel_req(struct l2cap_conn *conn,
return 0;
}
static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident,
u16 icid, u16 result)
static void l2cap_send_move_chan_rsp(struct l2cap_chan *chan, u16 result)
{
struct l2cap_move_chan_rsp rsp;
BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result);
BT_DBG("chan %p, result 0x%4.4x", chan, result);
rsp.icid = cpu_to_le16(icid);
rsp.icid = cpu_to_le16(chan->dcid);
rsp.result = cpu_to_le16(result);
l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_RSP, sizeof(rsp), &rsp);
l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_RSP,
sizeof(rsp), &rsp);
}
static void l2cap_send_move_chan_cfm(struct l2cap_chan *chan, u16 result)
@ -4248,11 +4249,118 @@ static void __release_logical_link(struct l2cap_chan *chan)
/* Placeholder - release the logical link */
}
static void l2cap_logical_fail(struct l2cap_chan *chan)
{
/* Logical link setup failed */
if (chan->state != BT_CONNECTED) {
/* Create channel failure, disconnect */
l2cap_send_disconn_req(chan->conn, chan, ECONNRESET);
return;
}
switch (chan->move_role) {
case L2CAP_MOVE_ROLE_RESPONDER:
l2cap_move_done(chan);
l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_SUPP);
break;
case L2CAP_MOVE_ROLE_INITIATOR:
if (chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_COMP ||
chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_CFM) {
/* Remote has only sent pending or
* success responses, clean up
*/
l2cap_move_done(chan);
}
/* Other amp move states imply that the move
* has already aborted
*/
l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED);
break;
}
}
static void l2cap_logical_finish_create(struct l2cap_chan *chan,
struct hci_chan *hchan)
{
struct l2cap_conf_rsp rsp;
u8 code;
chan->hs_hcon = hchan->conn;
chan->hs_hcon->l2cap_data = chan->conn;
code = l2cap_build_conf_rsp(chan, &rsp,
L2CAP_CONF_SUCCESS, 0);
l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CONF_RSP, code,
&rsp);
set_bit(CONF_OUTPUT_DONE, &chan->conf_state);
if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) {
int err = 0;
set_default_fcs(chan);
err = l2cap_ertm_init(chan);
if (err < 0)
l2cap_send_disconn_req(chan->conn, chan, -err);
else
l2cap_chan_ready(chan);
}
}
static void l2cap_logical_finish_move(struct l2cap_chan *chan,
struct hci_chan *hchan)
{
chan->hs_hcon = hchan->conn;
chan->hs_hcon->l2cap_data = chan->conn;
BT_DBG("move_state %d", chan->move_state);
switch (chan->move_state) {
case L2CAP_MOVE_WAIT_LOGICAL_COMP:
/* Move confirm will be sent after a success
* response is received
*/
chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS;
break;
case L2CAP_MOVE_WAIT_LOGICAL_CFM:
if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) {
chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY;
} else if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) {
chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP;
l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED);
} else if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) {
chan->move_state = L2CAP_MOVE_WAIT_CONFIRM;
l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS);
}
break;
default:
/* Move was not in expected state, free the channel */
__release_logical_link(chan);
chan->move_state = L2CAP_MOVE_STABLE;
}
}
/* Call with chan locked */
static void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan,
u8 status)
{
/* Placeholder */
return;
BT_DBG("chan %p, hchan %p, status %d", chan, hchan, status);
if (status) {
l2cap_logical_fail(chan);
__release_logical_link(chan);
return;
}
if (chan->state != BT_CONNECTED) {
/* Ignore logical link if channel is on BR/EDR */
if (chan->local_amp_id)
l2cap_logical_finish_create(chan, hchan);
} else {
l2cap_logical_finish_move(chan, hchan);
}
}
static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
@ -4260,6 +4368,7 @@ static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
u16 cmd_len, void *data)
{
struct l2cap_move_chan_req *req = data;
struct l2cap_move_chan_rsp rsp;
struct l2cap_chan *chan;
u16 icid = 0;
u16 result = L2CAP_MR_NOT_ALLOWED;
@ -4276,11 +4385,15 @@ static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
chan = l2cap_get_chan_by_dcid(conn, icid);
if (!chan) {
l2cap_send_move_chan_rsp(conn, cmd->ident, icid,
L2CAP_MR_NOT_ALLOWED);
rsp.icid = cpu_to_le16(icid);
rsp.result = __constant_cpu_to_le16(L2CAP_MR_NOT_ALLOWED);
l2cap_send_cmd(conn, cmd->ident, L2CAP_MOVE_CHAN_RSP,
sizeof(rsp), &rsp);
return 0;
}
chan->ident = cmd->ident;
if (chan->scid < L2CAP_CID_DYN_START ||
chan->chan_policy == BT_CHANNEL_POLICY_BREDR_ONLY ||
(chan->mode != L2CAP_MODE_ERTM &&
@ -4319,7 +4432,6 @@ static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
goto send_move_response;
}
chan->ident = cmd->ident;
chan->move_role = L2CAP_MOVE_ROLE_RESPONDER;
l2cap_move_setup(chan);
chan->move_id = req->dest_amp_id;
@ -4342,7 +4454,7 @@ static inline int l2cap_move_channel_req(struct l2cap_conn *conn,
}
send_move_response:
l2cap_send_move_chan_rsp(conn, cmd->ident, icid, result);
l2cap_send_move_chan_rsp(chan, result);
l2cap_chan_unlock(chan);