Merge bk://linux.bkbits.net/linux-2.5

into qualcomm.com:/home/kernel/bt-2.5

drivers/bluetooth/hci_ldisc.c

@@ -535,6 +535,7 @@ int __init hci_uart_init(void)
 	hci_uart_ldisc.receive_room= hci_uart_tty_room;
 	hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
 	hci_uart_ldisc.write_wakeup= hci_uart_tty_wakeup;
+	hci_uart_ldisc.owner       = THIS_MODULE;
 
 	if ((err = tty_register_ldisc(N_HCI, &hci_uart_ldisc))) {
 		BT_ERR("HCI line discipline registration failed. (%d)", err);

include/net/bluetooth/l2cap.h

@@ -231,8 +231,10 @@ struct l2cap_pinfo {
 	struct sock 		*prev_c;
 };
 
-#define CONF_REQ_SENT    0x01
-#define CONF_INPUT_DONE  0x02
-#define CONF_OUTPUT_DONE 0x04
+#define L2CAP_CONF_REQ_SENT    0x01
+#define L2CAP_CONF_INPUT_DONE  0x02
+#define L2CAP_CONF_OUTPUT_DONE 0x04
+
+void l2cap_load(void);
 
 #endif /* __L2CAP_H */

include/net/bluetooth/rfcomm.h

@@ -185,10 +185,11 @@ struct rfcomm_dlc {
 	atomic_t      refcnt;
 	u8            dlci;
 	u8            addr;
-
-	uint          mtu;
+	u8            priority;
 	u8            v24_sig;
+	u8            mscex;
 
+	uint          mtu;
 	uint          credits;
 	uint          rx_credits;
 	uint          tx_credits;
@@ -213,6 +214,11 @@ struct rfcomm_dlc {
 #define RFCOMM_SCHED_TIMEO  3
 #define RFCOMM_SCHED_WAKEUP 31
 
+/* MSC exchange flags */
+#define RFCOMM_MSCEX_TX     1
+#define RFCOMM_MSCEX_RX     2
+#define RFCOMM_MSCEX_OK     (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX)
+
 extern struct task_struct *rfcomm_thread;
 extern unsigned long rfcomm_event;
 

net/bluetooth/af_bluetooth.c

@@ -92,6 +92,8 @@ int bt_sock_unregister(int proto)
 
 static int bt_sock_create(struct socket *sock, int proto)
 {
+	int err = 0;
+
 	if (proto >= BT_MAX_PROTO)
 		return -EINVAL;
 
@@ -102,11 +104,12 @@ static int bt_sock_create(struct socket *sock, int proto)
 		request_module(module_name);
 	}
 #endif
-
-	if (!bt_proto[proto])
-		return -ENOENT;
-
-	return bt_proto[proto]->create(sock, proto);
+	err = -EPROTONOSUPPORT;
+	if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) {
+		err = bt_proto[proto]->create(sock, proto);
+		module_put(bt_proto[proto]->owner);
+	}
+	return err; 
 }
 
 struct sock *bt_sock_alloc(struct socket *sock, int proto, int pi_size, int prio)

net/bluetooth/bnep/core.c

@@ -85,14 +85,17 @@ static struct bnep_session *__bnep_get_session(u8 *dst)
 
 static void __bnep_link_session(struct bnep_session *s)
 {
-	MOD_INC_USE_COUNT;
+	/* It's safe to call __module_get() here because sessions are added
+	   by the socket layer which has to hold the refference to this module.
+	 */
+	__module_get(THIS_MODULE);
 	list_add(&s->list, &bnep_session_list);	
 }
 
 static void __bnep_unlink_session(struct bnep_session *s)
 {
 	list_del(&s->list);
-	MOD_DEC_USE_COUNT;
+	module_put(THIS_MODULE);
 }
 
 static int bnep_send(struct bnep_session *s, void *data, size_t len)
@@ -677,7 +680,9 @@ int bnep_get_conninfo(struct bnep_conninfo *ci)
 
 static int  __init bnep_init_module(void)
 {	
-	char flt[50] = "";	
+	char flt[50] = "";
+
+	l2cap_load();
 
 #ifdef CONFIG_BT_BNEP_PROTO_FILTER
 	strcat(flt, "protocol ");

net/bluetooth/bnep/sock.c

@@ -67,8 +67,6 @@ static int bnep_sock_release(struct socket *sock)
 
 	sock_orphan(sk);
 	sock_put(sk);
-
-	MOD_DEC_USE_COUNT;
 	return 0;
 }
 
@@ -179,13 +177,10 @@ static int bnep_sock_create(struct socket *sock, int protocol)
 		return -ENOMEM;
 	sock->ops = &bnep_sock_ops;
 
-	MOD_INC_USE_COUNT;
-
-	sock->state = SS_UNCONNECTED;
+	sock->state  = SS_UNCONNECTED;
 
 	sk->destruct = NULL;
 	sk->protocol = protocol;
-
 	return 0;
 }
 

net/bluetooth/l2cap.c

@@ -145,8 +145,6 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
 	conn->chan_list.lock = RW_LOCK_UNLOCKED;
 
 	BT_DBG("hcon %p conn %p", hcon, conn);
-
-	MOD_INC_USE_COUNT;
 	return conn;
 }
 
@@ -173,8 +171,6 @@ static int l2cap_conn_del(struct hci_conn *hcon, int err)
 
 	hcon->l2cap_data = NULL;
 	kfree(conn);
-
-	MOD_DEC_USE_COUNT;
 	return 0;
 }
 
@@ -242,8 +238,6 @@ static void l2cap_sock_destruct(struct sock *sk)
 
 	if (sk->protinfo)
 		kfree(sk->protinfo);
-	
-	MOD_DEC_USE_COUNT;
 }
 
 static void l2cap_sock_cleanup_listen(struct sock *parent)
@@ -356,6 +350,8 @@ static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, int prio)
 	if (!sk)
 		return NULL;
 
+	sk_set_owner(sk, THIS_MODULE);
+
 	sk->destruct = l2cap_sock_destruct;
 	sk->sndtimeo = L2CAP_CONN_TIMEOUT;
 
@@ -365,8 +361,6 @@ static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, int prio)
 	l2cap_sock_init_timer(sk);
 
 	bt_sock_link(&l2cap_sk_list, sk);
-
-	MOD_INC_USE_COUNT;
 	return sk;
 }
 
@@ -1319,15 +1313,18 @@ static int l2cap_build_conf_rsp(struct sock *sk, void *data, int *result)
 {
 	struct l2cap_conf_rsp *rsp = data;
 	void *ptr = rsp->data;
+	u16 flags = 0;
 
 	BT_DBG("sk %p complete %d", sk, result ? 1 : 0);
 
 	if (result)
 		*result = l2cap_conf_output(sk, &ptr);
+	else
+		flags = 0x0001;
 
 	rsp->scid   = __cpu_to_le16(l2cap_pi(sk)->dcid);
 	rsp->result = __cpu_to_le16(result ? *result : 0);
-	rsp->flags  = __cpu_to_le16(0);
+	rsp->flags  = __cpu_to_le16(flags);
 
 	return ptr - data;
 }
@@ -1440,7 +1437,7 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd
 	case L2CAP_CR_SUCCESS:
 		sk->state = BT_CONFIG;
 		l2cap_pi(sk)->dcid = dcid;
-		l2cap_pi(sk)->conf_state |= CONF_REQ_SENT;
+		l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
 
 		l2cap_send_req(conn, L2CAP_CONF_REQ, l2cap_build_conf_req(sk, req), req);
 		break;
@@ -1475,7 +1472,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 
 	l2cap_parse_conf_req(sk, req->data, cmd->len - sizeof(*req));
 
-	if (flags & 0x01) {
+	if (flags & 0x0001) {
 		/* Incomplete config. Send empty response. */
 		l2cap_send_rsp(conn, cmd->ident, L2CAP_CONF_RSP, l2cap_build_conf_rsp(sk, rsp, NULL), rsp);
 		goto unlock;
@@ -1488,12 +1485,12 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 		goto unlock;
 
 	/* Output config done */
-	l2cap_pi(sk)->conf_state |= CONF_OUTPUT_DONE;
+	l2cap_pi(sk)->conf_state |= L2CAP_CONF_OUTPUT_DONE;
 
-	if (l2cap_pi(sk)->conf_state & CONF_INPUT_DONE) {
+	if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
 		sk->state = BT_CONNECTED;
 		l2cap_chan_ready(sk);
-	} else if (!(l2cap_pi(sk)->conf_state & CONF_REQ_SENT)) {
+	} else if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) {
 		u8 req[64];
 		l2cap_send_req(conn, L2CAP_CONF_REQ, l2cap_build_conf_req(sk, req), req);
 	}
@@ -1538,9 +1535,9 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
 		goto done;
 
 	/* Input config done */
-	l2cap_pi(sk)->conf_state |= CONF_INPUT_DONE;
+	l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE;
 
-	if (l2cap_pi(sk)->conf_state & CONF_OUTPUT_DONE) {
+	if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) {
 		sk->state = BT_CONNECTED;
 		l2cap_chan_ready(sk);
 	}
@@ -1943,21 +1940,27 @@ static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 fl
 		}
 
 		if (skb->len < 2) {
-			BT_ERR("Frame is too small (len %d)", skb->len);
+			BT_ERR("Frame is too short (len %d)", skb->len);
 			goto drop;
 		}
 
 		hdr = (struct l2cap_hdr *) skb->data;
 		len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE;
 
-		BT_DBG("Start: total len %d, frag len %d", len, skb->len);
-
 		if (len == skb->len) {
 			/* Complete frame received */
 			l2cap_recv_frame(conn, skb);
 			return 0;
 		}
 
+		BT_DBG("Start: total len %d, frag len %d", len, skb->len);
+
+		if (skb->len > len) {
+			BT_ERR("Frame is too long (len %d, expected len %d)",
+				skb->len, len);
+			goto drop;
+		}
+
 		/* Allocate skb for the complete frame (with header) */
 		if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC)))
 			goto drop;
@@ -1973,7 +1976,7 @@ static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 fl
 		}
 
 		if (skb->len > conn->rx_len) {
-			BT_ERR("Fragment is too large (len %d, expect %d)",
+			BT_ERR("Fragment is too long (len %d, expected %d)",
 					skb->len, conn->rx_len);
 			kfree_skb(conn->rx_skb);
 			conn->rx_skb = NULL;
@@ -2134,7 +2137,6 @@ int __init l2cap_init(void)
 		return err;
 	}
 
-
 	l2cap_proc_init();
 	
 	BT_INFO("L2CAP ver %s", VERSION);
@@ -2155,6 +2157,15 @@ void __exit l2cap_cleanup(void)
 		BT_ERR("L2CAP protocol unregistration failed");
 }
 
+void l2cap_load(void)
+{
+	/* Dummy function to trigger automatic L2CAP module loading by 
+	   other modules that use L2CAP sockets but don not use any other
+	   symbols from it. */
+	return;
+}
+EXPORT_SYMBOL(l2cap_load);
+
 module_init(l2cap_init);
 module_exit(l2cap_cleanup);
 

net/bluetooth/rfcomm/core.c

@@ -52,7 +52,7 @@
 #include <net/bluetooth/l2cap.h>
 #include <net/bluetooth/rfcomm.h>
 
-#define VERSION "0.3"
+#define VERSION "1.0"
 
 #ifndef CONFIG_BT_RFCOMM_DEBUG
 #undef  BT_DBG
@@ -203,6 +203,7 @@ static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d)
 
 	d->state      = BT_OPEN;
 	d->flags      = 0;
+	d->mscex      = 0;
 	d->mtu        = RFCOMM_DEFAULT_MTU;
 	d->v24_sig    = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV;
 
@@ -304,10 +305,11 @@ static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst,
 
 	rfcomm_dlc_clear_state(d);
 
-	d->dlci    = dlci;
-	d->addr    = __addr(s->initiator, dlci);
+	d->dlci     = dlci;
+	d->addr     = __addr(s->initiator, dlci);
+	d->priority = 7;
 
-	d->state   = BT_CONFIG;
+	d->state    = BT_CONFIG;
 	rfcomm_dlc_link(s, d);
 
 	d->mtu     = s->mtu;
@@ -481,9 +483,12 @@ struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state)
 	list_add(&s->list, &session_list);
 
 	/* Do not increment module usage count for listeting sessions.
-	 * Otherwise we won't be able to unload the module. */
+	 * Otherwise we won't be able to unload the module.
+	 * Non listening session are added either by a socket or a TTYs
+	 * which means that we already hold refcount to this module.
+	 */
 	if (state != BT_LISTEN)
-		MOD_INC_USE_COUNT;
+		__module_get(THIS_MODULE);
 	return s;
 }
 
@@ -502,7 +507,7 @@ void rfcomm_session_del(struct rfcomm_session *s)
 	kfree(s);
 
 	if (state != BT_LISTEN)
-		MOD_DEC_USE_COUNT;
+		module_put(THIS_MODULE);
 }
 
 struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst)
@@ -741,7 +746,7 @@ static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d
 
 	pn = (void *) ptr; ptr += sizeof(*pn);
 	pn->dlci        = d->dlci;
-	pn->priority    = 0;
+	pn->priority    = d->priority;
 	pn->ack_timer   = 0;
 	pn->max_retrans = 0;
 
@@ -1099,8 +1104,6 @@ static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn)
 			set_bit(RFCOMM_TX_THROTTLED, &d->flags);
 			d->credits = 0;
 		}
-
-		d->mtu = btohs(pn->mtu);
 	} else {
 		if (pn->flow_ctrl == 0xe0) {
 			d->tx_credits = pn->credits;
@@ -1108,10 +1111,12 @@ static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn)
 			set_bit(RFCOMM_TX_THROTTLED, &d->flags);
 			d->credits = 0;
 		}
-
-		d->mtu = btohs(pn->mtu);
 	}
 
+	d->priority = pn->priority;
+
+	d->mtu = btohs(pn->mtu);
+
 	return 0;
 }
 
@@ -1137,7 +1142,7 @@ static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb)
 			switch (d->state) {
 			case BT_CONFIG:
 				rfcomm_apply_pn(d, cr, pn);
-				
+
 				d->state = BT_CONNECT;
 				rfcomm_send_sabm(s, d->dlci);
 				break;
@@ -1148,7 +1153,7 @@ static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb)
 
 		if (!cr)
 			return 0;
-		
+
 		/* PN request for non existing DLC.
 		 * Assume incoming connection. */
 		if (rfcomm_connect_ind(s, channel, &d)) {
@@ -1157,7 +1162,7 @@ static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb)
 			rfcomm_dlc_link(s, d);
 
 			rfcomm_apply_pn(d, cr, pn);
-			
+
 			d->state = BT_OPEN;
 			rfcomm_send_pn(s, 0, d);
 		} else {
@@ -1229,21 +1234,21 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
 	if (rpn->param_mask & RFCOMM_RPN_PM_FLOW) {
 		if (rpn->flow_ctrl != RFCOMM_RPN_FLOW_NONE) {
 			BT_DBG("RPN flow ctrl mismatch 0x%x", rpn->flow_ctrl);
-			rpn->flow_ctrl = RFCOMM_RPN_FLOW_NONE;
+			flow_ctrl = RFCOMM_RPN_FLOW_NONE;
 			rpn_mask ^= RFCOMM_RPN_PM_FLOW;
 		}
 	}
 	if (rpn->param_mask & RFCOMM_RPN_PM_XON) {
 		if (rpn->xon_char != RFCOMM_RPN_XON_CHAR) {
 			BT_DBG("RPN XON char mismatch 0x%x", rpn->xon_char);
-			rpn->xon_char = RFCOMM_RPN_XON_CHAR;
+			xon_char = RFCOMM_RPN_XON_CHAR;
 			rpn_mask ^= RFCOMM_RPN_PM_XON;
 		}
 	}
 	if (rpn->param_mask & RFCOMM_RPN_PM_XOFF) {
 		if (rpn->xoff_char != RFCOMM_RPN_XOFF_CHAR) {
 			BT_DBG("RPN XOFF char mismatch 0x%x", rpn->xoff_char);
-			rpn->xoff_char = RFCOMM_RPN_XOFF_CHAR;
+			xoff_char = RFCOMM_RPN_XOFF_CHAR;
 			rpn_mask ^= RFCOMM_RPN_PM_XOFF;
 		}
 	}
@@ -1284,11 +1289,11 @@ static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb
 
 	BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig);
 
-	if (!cr)
+	d = rfcomm_dlc_get(s, dlci);
+	if (!d) 
 		return 0;
 
-	d = rfcomm_dlc_get(s, dlci);
-	if (d) {
+	if (cr) {
 		if (msc->v24_sig & RFCOMM_V24_FC && !d->credits)
 			set_bit(RFCOMM_TX_THROTTLED, &d->flags);
 		else
@@ -1300,7 +1305,11 @@ static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb
 		rfcomm_dlc_unlock(d);
 		
 		rfcomm_send_msc(s, 0, dlci, msc->v24_sig);
-	}
+
+		d->mscex |= RFCOMM_MSCEX_RX;
+	} else 
+		d->mscex |= RFCOMM_MSCEX_TX;
+
 	return 0;
 }
 
@@ -1524,7 +1533,8 @@ static inline void rfcomm_process_dlcs(struct rfcomm_session *s)
 			continue;
 		}
 
-		if (d->state == BT_CONNECTED || d->state == BT_DISCONN)
+		if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) &&
+				d->mscex == RFCOMM_MSCEX_OK)
 			rfcomm_process_tx(d);
 	}
 }
@@ -1869,6 +1879,8 @@ static void __exit rfcomm_proc_cleanup(void)
 /* ---- Initialization ---- */
 int  __init rfcomm_init(void)
 {
+	l2cap_load();
+
 	kernel_thread(rfcomm_run, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
 
 	BT_INFO("RFCOMM ver %s", VERSION);

net/bluetooth/rfcomm/sock.c

@@ -182,8 +182,6 @@ static void rfcomm_sock_destruct(struct sock *sk)
 
 	if (sk->protinfo)
 		kfree(sk->protinfo);
-	
-	MOD_DEC_USE_COUNT;
 }
 
 static void rfcomm_sock_cleanup_listen(struct sock *parent)
@@ -265,6 +263,8 @@ static struct sock *rfcomm_sock_alloc(struct socket *sock, int proto, int prio)
 	if (!sk)
 		return NULL;
 
+	sk_set_owner(sk, THIS_MODULE);
+
 	d = rfcomm_dlc_alloc(prio);
 	if (!d) {
 		sk_free(sk);
@@ -288,8 +288,6 @@ static struct sock *rfcomm_sock_alloc(struct socket *sock, int proto, int prio)
 	bt_sock_link(&rfcomm_sk_list, sk);
 
 	BT_DBG("sk %p", sk);
-
-	MOD_INC_USE_COUNT;
 	return sk;
 }
 

net/bluetooth/rfcomm/tty.c

@@ -99,7 +99,9 @@ static void rfcomm_dev_destruct(struct rfcomm_dev *dev)
 	rfcomm_dlc_put(dlc);
 	kfree(dev);
 
-	MOD_DEC_USE_COUNT;
+	/* It's safe to call module_put() here because socket still 
+	 holds refference to this module. */
+	module_put(THIS_MODULE);
 }
 
 static inline void rfcomm_dev_hold(struct rfcomm_dev *dev)
@@ -211,8 +213,9 @@ static int rfcomm_dev_add(struct rfcomm_dev_req *req, struct rfcomm_dlc *dlc)
 	dev->dlc   = dlc;
 	rfcomm_dlc_unlock(dlc);
 
-	MOD_INC_USE_COUNT;
-	
+	/* It's safe to call __module_get() here because socket already 
+	 holds refference to this module. */
+	__module_get(THIS_MODULE);
 out:
 	write_unlock_bh(&rfcomm_dev_lock);
 

net/bluetooth/sco.c

@@ -145,8 +145,6 @@ static struct sco_conn *sco_conn_add(struct hci_conn *hcon, __u8 status)
 		conn->mtu = 60;
 
 	BT_DBG("hcon %p conn %p", hcon, conn);
-
-	MOD_INC_USE_COUNT;
 	return conn;
 }
 
@@ -180,8 +178,6 @@ static int sco_conn_del(struct hci_conn *hcon, int err)
 
 	hcon->sco_data = NULL;
 	kfree(conn);
-
-	MOD_DEC_USE_COUNT;
 	return 0;
 }
 
@@ -347,8 +343,6 @@ static void sco_sock_destruct(struct sock *sk)
 
 	if (sk->protinfo)
 		kfree(sk->protinfo);
-	
-	MOD_DEC_USE_COUNT;
 }
 
 static void sco_sock_cleanup_listen(struct sock *parent)
@@ -434,6 +428,8 @@ static struct sock *sco_sock_alloc(struct socket *sock, int proto, int prio)
 	if (!sk)
 		return NULL;
 
+	sk_set_owner(sk, THIS_MODULE);
+
 	sk->destruct = sco_sock_destruct;
 	sk->sndtimeo = SCO_CONN_TIMEOUT;
 	sk->state    = BT_OPEN;
@@ -441,8 +437,6 @@ static struct sock *sco_sock_alloc(struct socket *sock, int proto, int prio)
 	sco_sock_init_timer(sk);
 
 	bt_sock_link(&sco_sk_list, sk);
-
-	MOD_INC_USE_COUNT;
 	return sk;
 }