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Bluetooth: Add state tracking to struct l2cap_chan 

Now socket state is tracked by struct sock and channel state is tracked by
chan->state. At this point both says the same, but this is going to change
when we add AMP Support for example.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Gustavo F. Padovan 2011-06-03 00:19:47 -03:00
parent ba3bd0ee39
commit 89bc500e41
3 changed files with 74 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/bluetooth/l2cap.h
View File

@ -287,6 +287,8 @@ struct l2cap_chan {
struct l2cap_conn *conn;
__u8 state;
__le16 psm;
__u16 dcid;
__u16 scid;
@ -365,6 +367,7 @@ struct l2cap_ops {
struct l2cap_chan *(*new_connection) (void *data);
int (*recv) (void *data, struct sk_buff *skb);
void (*close) (void *data);
void (*state_change) (void *data, int state);
};
struct l2cap_conn {

113
net/bluetooth/l2cap_core.c
View File

@ -210,27 +210,33 @@ static u16 l2cap_alloc_cid(struct l2cap_conn *conn)
static void l2cap_chan_set_timer(struct l2cap_chan *chan, long timeout)
{
BT_DBG("chan %p state %d timeout %ld", chan->sk, chan->sk->sk_state,
timeout);
BT_DBG("chan %p state %d timeout %ld", chan->sk, chan->state, timeout);
if (!mod_timer(&chan->chan_timer, jiffies + timeout))
sock_hold(chan->sk);
}
static void l2cap_chan_clear_timer(struct l2cap_chan *chan)
{
BT_DBG("chan %p state %d", chan, chan->sk->sk_state);
BT_DBG("chan %p state %d", chan, chan->state);
if (timer_pending(&chan->chan_timer) && del_timer(&chan->chan_timer))
__sock_put(chan->sk);
}
static void l2cap_state_change(struct l2cap_chan *chan, int state)
{
chan->state = state;
chan->ops->state_change(chan->data, state);
}
static void l2cap_chan_timeout(unsigned long arg)
{
struct l2cap_chan *chan = (struct l2cap_chan *) arg;
struct sock *sk = chan->sk;
int reason;
BT_DBG("chan %p state %d", chan, sk->sk_state);
BT_DBG("chan %p state %d", chan, chan->state);
bh_lock_sock(sk);
@ -242,9 +248,9 @@ static void l2cap_chan_timeout(unsigned long arg)
return;
}
if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG)
if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG)
reason = ECONNREFUSED;
else if (sk->sk_state == BT_CONNECT &&
else if (chan->state == BT_CONNECT &&
chan->sec_level != BT_SECURITY_SDP)
reason = ECONNREFUSED;
else
@ -274,6 +280,8 @@ struct l2cap_chan *l2cap_chan_create(struct sock *sk)
setup_timer(&chan->chan_timer, l2cap_chan_timeout, (unsigned long) chan);
chan->state = BT_OPEN;
return chan;
}
@ -348,7 +356,7 @@ static void l2cap_chan_del(struct l2cap_chan *chan, int err)
hci_conn_put(conn->hcon);
}
sk->sk_state = BT_CLOSED;
l2cap_state_change(chan, BT_CLOSED);
sock_set_flag(sk, SOCK_ZAPPED);
if (err)
@ -398,9 +406,6 @@ static void l2cap_chan_cleanup_listen(struct sock *parent)
release_sock(sk);
chan->ops->close(chan->data);
}
parent->sk_state = BT_CLOSED;
sock_set_flag(parent, SOCK_ZAPPED);
}
void l2cap_chan_close(struct l2cap_chan *chan, int reason)
@ -408,11 +413,14 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
struct l2cap_conn *conn = chan->conn;
struct sock *sk = chan->sk;
BT_DBG("chan %p state %d socket %p", chan, sk->sk_state, sk->sk_socket);
BT_DBG("chan %p state %d socket %p", chan, chan->state, sk->sk_socket);
switch (sk->sk_state) {
switch (chan->state) {
case BT_LISTEN:
l2cap_chan_cleanup_listen(sk);
l2cap_state_change(chan, BT_CLOSED);
sock_set_flag(sk, SOCK_ZAPPED);
break;
case BT_CONNECTED:
@ -436,7 +444,7 @@ void l2cap_chan_close(struct l2cap_chan *chan, int reason)
result = L2CAP_CR_SEC_BLOCK;
else
result = L2CAP_CR_BAD_PSM;
sk->sk_state = BT_DISCONN;
l2cap_state_change(chan, BT_DISCONN);
rsp.scid = cpu_to_le16(chan->dcid);
rsp.dcid = cpu_to_le16(chan->scid);
@ -548,13 +556,11 @@ static inline void l2cap_send_sframe(struct l2cap_chan *chan, u16 control)
{
struct sk_buff *skb;
struct l2cap_hdr *lh;
struct l2cap_pinfo *pi = l2cap_pi(chan->sk);
struct l2cap_conn *conn = chan->conn;
struct sock *sk = (struct sock *)pi;
int count, hlen = L2CAP_HDR_SIZE + 2;
u8 flags;
if (sk->sk_state != BT_CONNECTED)
if (chan->state != BT_CONNECTED)
return;
if (chan->fcs == L2CAP_FCS_CRC16)
@ -689,7 +695,7 @@ static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *c
l2cap_send_cmd(conn, l2cap_get_ident(conn),
L2CAP_DISCONN_REQ, sizeof(req), &req);
sk->sk_state = BT_DISCONN;
l2cap_state_change(chan, BT_DISCONN);
sk->sk_err = err;
}
@ -712,7 +718,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
continue;
}
if (sk->sk_state == BT_CONNECT) {
if (chan->state == BT_CONNECT) {
struct l2cap_conn_req req;
if (!l2cap_check_security(chan) ||
@ -728,7 +734,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
/* l2cap_chan_close() calls list_del(chan)
* so release the lock */
read_unlock_bh(&conn->chan_lock);
l2cap_chan_close(chan, ECONNRESET);
l2cap_chan_close(chan, ECONNRESET);
read_lock_bh(&conn->chan_lock);
bh_unlock_sock(sk);
continue;
@ -743,7 +749,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ,
sizeof(req), &req);
} else if (sk->sk_state == BT_CONNECT2) {
} else if (chan->state == BT_CONNECT2) {
struct l2cap_conn_rsp rsp;
char buf[128];
rsp.scid = cpu_to_le16(chan->dcid);
@ -757,7 +763,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
parent->sk_data_ready(parent, 0);
} else {
sk->sk_state = BT_CONFIG;
l2cap_state_change(chan, BT_CONFIG);
rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
}
@ -799,7 +805,7 @@ static struct l2cap_chan *l2cap_global_chan_by_scid(int state, __le16 cid, bdadd
list_for_each_entry(c, &chan_list, global_l) {
struct sock *sk = c->sk;
if (state && sk->sk_state != state)
if (state && c->state != state)
continue;
if (c->scid == cid) {
@ -862,7 +868,7 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn)
l2cap_chan_set_timer(chan, sk->sk_sndtimeo);
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
parent->sk_data_ready(parent, 0);
write_unlock_bh(&conn->chan_lock);
@ -889,15 +895,15 @@ static void l2cap_conn_ready(struct l2cap_conn *conn)
if (conn->hcon->type == LE_LINK) {
l2cap_chan_clear_timer(chan);
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
sk->sk_state_change(sk);
}
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
l2cap_chan_clear_timer(chan);
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
sk->sk_state_change(sk);
} else if (sk->sk_state == BT_CONNECT)
} else if (chan->state == BT_CONNECT)
l2cap_do_start(chan);
bh_unlock_sock(sk);
@ -1025,7 +1031,7 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr
list_for_each_entry(c, &chan_list, global_l) {
struct sock *sk = c->sk;
if (state && sk->sk_state != state)
if (state && c->state != state)
continue;
if (c->psm == psm) {
@ -1092,14 +1098,14 @@ int l2cap_chan_connect(struct l2cap_chan *chan)
l2cap_chan_add(conn, chan);
sk->sk_state = BT_CONNECT;
l2cap_state_change(chan, BT_CONNECT);
l2cap_chan_set_timer(chan, sk->sk_sndtimeo);
if (hcon->state == BT_CONNECTED) {
if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) {
l2cap_chan_clear_timer(chan);
if (l2cap_check_security(chan))
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
} else
l2cap_do_start(chan);
}
@ -1288,11 +1294,10 @@ static void l2cap_retransmit_one_frame(struct l2cap_chan *chan, u8 tx_seq)
int l2cap_ertm_send(struct l2cap_chan *chan)
{
struct sk_buff *skb, *tx_skb;
struct sock *sk = chan->sk;
u16 control, fcs;
int nsent = 0;
if (sk->sk_state != BT_CONNECTED)
if (chan->state != BT_CONNECTED)
return -ENOTCONN;
while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) {
@ -1668,7 +1673,7 @@ static void l2cap_chan_ready(struct sock *sk)
/* Outgoing channel.
* Wake up socket sleeping on connect.
*/
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
sk->sk_state_change(sk);
} else {
/* Incoming channel.
@ -2364,22 +2369,22 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) {
if (l2cap_check_security(chan)) {
if (bt_sk(sk)->defer_setup) {
sk->sk_state = BT_CONNECT2;
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
status = L2CAP_CS_AUTHOR_PEND;
parent->sk_data_ready(parent, 0);
} else {
sk->sk_state = BT_CONFIG;
l2cap_state_change(chan, BT_CONFIG);
result = L2CAP_CR_SUCCESS;
status = L2CAP_CS_NO_INFO;
}
} else {
sk->sk_state = BT_CONNECT2;
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
status = L2CAP_CS_AUTHEN_PEND;
}
} else {
sk->sk_state = BT_CONNECT2;
l2cap_state_change(chan, BT_CONNECT2);
result = L2CAP_CR_PEND;
status = L2CAP_CS_NO_INFO;
}
@ -2451,7 +2456,7 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd
switch (result) {
case L2CAP_CR_SUCCESS:
sk->sk_state = BT_CONFIG;
l2cap_state_change(chan, BT_CONFIG);
chan->ident = 0;
chan->dcid = dcid;
chan->conf_state &= ~L2CAP_CONF_CONNECT_PEND;
@ -2473,7 +2478,7 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd
default:
/* don't delete l2cap channel if sk is owned by user */
if (sock_owned_by_user(sk)) {
sk->sk_state = BT_DISCONN;
l2cap_state_change(chan, BT_DISCONN);
l2cap_chan_clear_timer(chan);
l2cap_chan_set_timer(chan, HZ / 5);
break;
@ -2520,7 +2525,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
sk = chan->sk;
if (sk->sk_state != BT_CONFIG) {
if (chan->state != BT_CONFIG) {
struct l2cap_cmd_rej rej;
rej.reason = cpu_to_le16(0x0002);
@ -2569,7 +2574,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
if (chan->conf_state & L2CAP_CONF_INPUT_DONE) {
set_default_fcs(chan);
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
chan->next_tx_seq = 0;
chan->expected_tx_seq = 0;
@ -2661,7 +2666,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
if (chan->conf_state & L2CAP_CONF_OUTPUT_DONE) {
set_default_fcs(chan);
sk->sk_state = BT_CONNECTED;
l2cap_state_change(chan, BT_CONNECTED);
chan->next_tx_seq = 0;
chan->expected_tx_seq = 0;
skb_queue_head_init(&chan->tx_q);
@ -2703,7 +2708,7 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd
/* don't delete l2cap channel if sk is owned by user */
if (sock_owned_by_user(sk)) {
sk->sk_state = BT_DISCONN;
l2cap_state_change(chan, BT_DISCONN);
l2cap_chan_clear_timer(chan);
l2cap_chan_set_timer(chan, HZ / 5);
bh_unlock_sock(sk);
@ -2737,7 +2742,7 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd
/* don't delete l2cap channel if sk is owned by user */
if (sock_owned_by_user(sk)) {
sk->sk_state = BT_DISCONN;
l2cap_state_change(chan,BT_DISCONN);
l2cap_chan_clear_timer(chan);
l2cap_chan_set_timer(chan, HZ / 5);
bh_unlock_sock(sk);
@ -3874,7 +3879,7 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk
BT_DBG("chan %p, len %d", chan, skb->len);
if (sk->sk_state != BT_CONNECTED)
if (chan->state != BT_CONNECTED)
goto drop;
switch (chan->mode) {
@ -3959,7 +3964,7 @@ static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, str
BT_DBG("sk %p, len %d", sk, skb->len);
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
if (chan->state != BT_BOUND && chan->state != BT_CONNECTED)
goto drop;
if (l2cap_pi(sk)->chan->imtu < skb->len)
@ -3992,7 +3997,7 @@ static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct
BT_DBG("sk %p, len %d", sk, skb->len);
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
if (chan->state != BT_BOUND && chan->state != BT_CONNECTED)
goto drop;
if (l2cap_pi(sk)->chan->imtu < skb->len)
@ -4066,7 +4071,7 @@ static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
list_for_each_entry(c, &chan_list, global_l) {
struct sock *sk = c->sk;
if (sk->sk_state != BT_LISTEN)
if (c->state != BT_LISTEN)
continue;
if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) {
@ -4167,14 +4172,14 @@ static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
continue;
}
if (!status && (sk->sk_state == BT_CONNECTED ||
sk->sk_state == BT_CONFIG)) {
if (!status && (chan->state == BT_CONNECTED ||
chan->state == BT_CONFIG)) {
l2cap_check_encryption(chan, encrypt);
bh_unlock_sock(sk);
continue;
}
if (sk->sk_state == BT_CONNECT) {
if (chan->state == BT_CONNECT) {
if (!status) {
struct l2cap_conn_req req;
req.scid = cpu_to_le16(chan->scid);
@ -4189,15 +4194,15 @@ static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
l2cap_chan_clear_timer(chan);
l2cap_chan_set_timer(chan, HZ / 10);
}
} else if (sk->sk_state == BT_CONNECT2) {
} else if (chan->state == BT_CONNECT2) {
struct l2cap_conn_rsp rsp;
__u16 result;
if (!status) {
sk->sk_state = BT_CONFIG;
l2cap_state_change(chan, BT_CONFIG);
result = L2CAP_CR_SUCCESS;
} else {
sk->sk_state = BT_DISCONN;
l2cap_state_change(chan, BT_DISCONN);
l2cap_chan_set_timer(chan, HZ / 10);
result = L2CAP_CR_SEC_BLOCK;
}
@ -4341,7 +4346,7 @@ static int l2cap_debugfs_show(struct seq_file *f, void *p)
seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n",
batostr(&bt_sk(sk)->src),
batostr(&bt_sk(sk)->dst),
sk->sk_state, __le16_to_cpu(c->psm),
c->state, __le16_to_cpu(c->psm),
c->scid, c->dcid, c->imtu, c->omtu,
c->sec_level, c->mode);
}

12
net/bluetooth/l2cap_sock.c
View File

@ -89,6 +89,8 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
chan->sec_level = BT_SECURITY_SDP;
bacpy(&bt_sk(sk)->src, &la.l2_bdaddr);
chan->state = BT_BOUND;
sk->sk_state = BT_BOUND;
done:
@ -214,6 +216,8 @@ static int l2cap_sock_listen(struct socket *sock, int backlog)
sk->sk_max_ack_backlog = backlog;
sk->sk_ack_backlog = 0;
chan->state = BT_LISTEN;
sk->sk_state = BT_LISTEN;
done:
@ -803,11 +807,19 @@ static void l2cap_sock_close_cb(void *data)
l2cap_sock_kill(sk);
}
static void l2cap_sock_state_change_cb(void *data, int state)
{
struct sock *sk = data;
sk->sk_state = state;
}
static struct l2cap_ops l2cap_chan_ops = {
.name = "L2CAP Socket Interface",
.new_connection = l2cap_sock_new_connection_cb,
.recv = l2cap_sock_recv_cb,
.close = l2cap_sock_close_cb,
.state_change = l2cap_sock_state_change_cb,
};
static void l2cap_sock_destruct(struct sock *sk)