From: Gustavo F. Padovan Date: Mon, 2 May 2011 21:25:01 +0000 (-0300) Subject: Bluetooth: create channel timer to replace sk_timer X-Git-Tag: firefly_0821_release~7613^2~535 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=13003e04ed891cdfa52ccc7023867c896e1ca611;p=firefly-linux-kernel-4.4.55.git Bluetooth: create channel timer to replace sk_timer The new timer does not belong to struct sock, tought it still touch some sock things, but this will be sorted out soon. Change-Id: I55dc122657f3b8e80e76acf8c479e2d5c9889af5 Signed-off-by: Gustavo F. Padovan --- diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h index 094a7ac16ffe..efb1fc4f3a03 100644 --- a/include/net/bluetooth/l2cap.h +++ b/include/net/bluetooth/l2cap.h @@ -340,6 +340,7 @@ struct l2cap_chan { __u8 remote_max_tx; __u16 remote_mps; + struct timer_list chan_timer; struct timer_list retrans_timer; struct timer_list monitor_timer; struct timer_list ack_timer; @@ -457,12 +458,12 @@ int __l2cap_wait_ack(struct sock *sk); int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); -void l2cap_sock_set_timer(struct sock *sk, long timeout); -void l2cap_sock_clear_timer(struct sock *sk); void l2cap_sock_kill(struct sock *sk); void l2cap_sock_init(struct sock *sk, struct sock *parent); struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); + +void l2cap_chan_clear_timer(struct l2cap_chan *chan); struct l2cap_chan *l2cap_chan_create(struct sock *sk); void __l2cap_chan_close(struct l2cap_chan *chan, int reason); void l2cap_chan_destroy(struct l2cap_chan *chan); diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 7b8da8c2eca7..a81d68911b22 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -208,6 +208,56 @@ static u16 l2cap_alloc_cid(struct l2cap_conn *conn) return 0; } +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); + if (!mod_timer(&chan->chan_timer, jiffies + timeout)) + sock_hold(chan->sk); +} + +void l2cap_chan_clear_timer(struct l2cap_chan *chan) +{ + BT_DBG("chan %p state %d", chan, chan->sk->sk_state); + + if (timer_pending(&chan->chan_timer) && del_timer(&chan->chan_timer)) + __sock_put(chan->sk); +} + +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); + + bh_lock_sock(sk); + + if (sock_owned_by_user(sk)) { + /* sk is owned by user. Try again later */ + l2cap_chan_set_timer(chan, HZ / 5); + bh_unlock_sock(sk); + sock_put(sk); + return; + } + + if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) + reason = ECONNREFUSED; + else if (sk->sk_state == BT_CONNECT && + chan->sec_level != BT_SECURITY_SDP) + reason = ECONNREFUSED; + else + reason = ETIMEDOUT; + + __l2cap_chan_close(chan, reason); + + bh_unlock_sock(sk); + + l2cap_sock_kill(sk); + sock_put(sk); +} + struct l2cap_chan *l2cap_chan_create(struct sock *sk) { struct l2cap_chan *chan; @@ -222,6 +272,8 @@ struct l2cap_chan *l2cap_chan_create(struct sock *sk) list_add(&chan->global_l, &chan_list); write_unlock_bh(&chan_list_lock); + setup_timer(&chan->chan_timer, l2cap_chan_timeout, (unsigned long) chan); + return chan; } @@ -281,7 +333,7 @@ static void l2cap_chan_del(struct l2cap_chan *chan, int err) struct l2cap_conn *conn = chan->conn; struct sock *parent = bt_sk(sk)->parent; - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); BT_DBG("chan %p, conn %p, err %d", chan, conn, err); @@ -334,7 +386,7 @@ static void l2cap_chan_del(struct l2cap_chan *chan, int err) /* Must be called on unlocked socket. */ static void l2cap_chan_close(struct sock *sk) { - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(l2cap_pi(sk)->chan); lock_sock(sk); __l2cap_chan_close(l2cap_pi(sk)->chan, ECONNRESET); release_sock(sk); @@ -371,7 +423,7 @@ void __l2cap_chan_close(struct l2cap_chan *chan, int reason) case BT_CONFIG: if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && conn->hcon->type == ACL_LINK) { - l2cap_sock_set_timer(sk, sk->sk_sndtimeo); + l2cap_chan_set_timer(chan, sk->sk_sndtimeo); l2cap_send_disconn_req(conn, chan, reason); } else l2cap_chan_del(chan, reason); @@ -815,7 +867,7 @@ static void l2cap_le_conn_ready(struct l2cap_conn *conn) __l2cap_chan_add(conn, chan); - l2cap_sock_set_timer(sk, sk->sk_sndtimeo); + l2cap_chan_set_timer(chan, sk->sk_sndtimeo); sk->sk_state = BT_CONNECTED; parent->sk_data_ready(parent, 0); @@ -843,13 +895,13 @@ static void l2cap_conn_ready(struct l2cap_conn *conn) bh_lock_sock(sk); if (conn->hcon->type == LE_LINK) { - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); sk->sk_state = BT_CONNECTED; sk->sk_state_change(sk); } if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); sk->sk_state = BT_CONNECTED; sk->sk_state_change(sk); } else if (sk->sk_state == BT_CONNECT) @@ -1048,11 +1100,11 @@ int l2cap_chan_connect(struct l2cap_chan *chan) l2cap_chan_add(conn, chan); sk->sk_state = BT_CONNECT; - l2cap_sock_set_timer(sk, sk->sk_sndtimeo); + l2cap_chan_set_timer(chan, sk->sk_sndtimeo); if (hcon->state == BT_CONNECTED) { if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); if (l2cap_check_security(chan)) sk->sk_state = BT_CONNECTED; } else @@ -1616,7 +1668,7 @@ static void l2cap_chan_ready(struct sock *sk) BT_DBG("sk %p, parent %p", sk, parent); chan->conf_state = 0; - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); if (!parent) { /* Outgoing channel. @@ -2318,7 +2370,7 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd dcid = chan->scid; - l2cap_sock_set_timer(sk, sk->sk_sndtimeo); + l2cap_chan_set_timer(chan, sk->sk_sndtimeo); chan->ident = cmd->ident; @@ -2435,8 +2487,8 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd /* don't delete l2cap channel if sk is owned by user */ if (sock_owned_by_user(sk)) { sk->sk_state = BT_DISCONN; - l2cap_sock_clear_timer(sk); - l2cap_sock_set_timer(sk, HZ / 5); + l2cap_chan_clear_timer(chan); + l2cap_chan_set_timer(chan, HZ / 5); break; } @@ -2609,7 +2661,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr default: sk->sk_err = ECONNRESET; - l2cap_sock_set_timer(sk, HZ * 5); + l2cap_chan_set_timer(chan, HZ * 5); l2cap_send_disconn_req(conn, chan, ECONNRESET); goto done; } @@ -2665,8 +2717,8 @@ 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_sock_clear_timer(sk); - l2cap_sock_set_timer(sk, HZ / 5); + l2cap_chan_clear_timer(chan); + l2cap_chan_set_timer(chan, HZ / 5); bh_unlock_sock(sk); return 0; } @@ -2699,8 +2751,8 @@ 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_sock_clear_timer(sk); - l2cap_sock_set_timer(sk, HZ / 5); + l2cap_chan_clear_timer(chan); + l2cap_chan_set_timer(chan, HZ / 5); bh_unlock_sock(sk); return 0; } @@ -4091,20 +4143,18 @@ static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) { - struct sock *sk = chan->sk; - if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) return; if (encrypt == 0x00) { if (chan->sec_level == BT_SECURITY_MEDIUM) { - l2cap_sock_clear_timer(sk); - l2cap_sock_set_timer(sk, HZ * 5); + l2cap_chan_clear_timer(chan); + l2cap_chan_set_timer(chan, HZ * 5); } else if (chan->sec_level == BT_SECURITY_HIGH) __l2cap_chan_close(chan, ECONNREFUSED); } else { if (chan->sec_level == BT_SECURITY_MEDIUM) - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); } } @@ -4149,8 +4199,8 @@ static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req); } else { - l2cap_sock_clear_timer(sk); - l2cap_sock_set_timer(sk, HZ / 10); + l2cap_chan_clear_timer(chan); + l2cap_chan_set_timer(chan, HZ / 10); } } else if (sk->sk_state == BT_CONNECT2) { struct l2cap_conn_rsp rsp; @@ -4169,7 +4219,7 @@ static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) } } else { sk->sk_state = BT_DISCONN; - l2cap_sock_set_timer(sk, HZ / 10); + l2cap_chan_set_timer(chan, HZ / 10); res = L2CAP_CR_SEC_BLOCK; stat = L2CAP_CS_NO_INFO; } diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 2d428f8af921..f07e63ad2134 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -32,52 +32,6 @@ static const struct proto_ops l2cap_sock_ops; -/* ---- L2CAP timers ---- */ -static void l2cap_sock_timeout(unsigned long arg) -{ - struct sock *sk = (struct sock *) arg; - int reason; - - BT_DBG("sock %p state %d", sk, sk->sk_state); - - bh_lock_sock(sk); - - if (sock_owned_by_user(sk)) { - /* sk is owned by user. Try again later */ - l2cap_sock_set_timer(sk, HZ / 5); - bh_unlock_sock(sk); - sock_put(sk); - return; - } - - if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) - reason = ECONNREFUSED; - else if (sk->sk_state == BT_CONNECT && - l2cap_pi(sk)->chan->sec_level != BT_SECURITY_SDP) - reason = ECONNREFUSED; - else - reason = ETIMEDOUT; - - __l2cap_chan_close(l2cap_pi(sk)->chan, reason); - - bh_unlock_sock(sk); - - l2cap_sock_kill(sk); - sock_put(sk); -} - -void l2cap_sock_set_timer(struct sock *sk, long timeout) -{ - BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); - sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); -} - -void l2cap_sock_clear_timer(struct sock *sk) -{ - BT_DBG("sock %p state %d", sk, sk->sk_state); - sk_stop_timer(sk, &sk->sk_timer); -} - static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) { struct sock *sk = sock->sk; @@ -754,7 +708,7 @@ static int l2cap_sock_shutdown(struct socket *sock, int how) err = __l2cap_wait_ack(sk); sk->sk_shutdown = SHUTDOWN_MASK; - l2cap_sock_clear_timer(sk); + l2cap_chan_clear_timer(chan); __l2cap_chan_close(chan, 0); if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) @@ -880,8 +834,6 @@ struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, g sk->sk_protocol = proto; sk->sk_state = BT_OPEN; - setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); - return sk; }