[PATCH 1/2] Bluetooth: Get ride of __l2cap_get_sock_by_psm()

[PATCH 1/2] Bluetooth: Get ride of __l2cap_get_sock_by_psm()

[Gustavo F. Padovan]

l2cap_get_sock_by_psm() was the only user of this function, so I merged
both into l2cap_get_sock_by_psm(). The socket lock now should be hold
outside of l2cap_get_sock_by_psm() once we hold and release it inside the
same function now.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/l2cap.c |   22 +++++++++-------------
 1 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 18a802c..12b4aa2 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -751,11 +751,13 @@ found:
 /* Find socket with psm and source bdaddr.
  * Returns closest match.
  */
-static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
+static struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
 {
 	struct sock *sk = NULL, *sk1 = NULL;
 	struct hlist_node *node;
 
+	read_lock(&l2cap_sk_list.lock);
+
 	sk_for_each(sk, node, &l2cap_sk_list.head) {
 		if (state && sk->sk_state != state)
 			continue;
@@ -770,20 +772,10 @@ static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src
 				sk1 = sk;
 		}
 	}
-	return node ? sk : sk1;
-}
 
-/* Find socket with given address (psm, src).
- * Returns locked socket */
-static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
-{
-	struct sock *s;
-	read_lock(&l2cap_sk_list.lock);
-	s = __l2cap_get_sock_by_psm(state, psm, src);
-	if (s)
-		bh_lock_sock(s);
 	read_unlock(&l2cap_sk_list.lock);
-	return s;
+
+	return node ? sk : sk1;
 }
 
 static void l2cap_sock_destruct(struct sock *sk)
@@ -2934,6 +2926,8 @@ static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hd
 		goto sendresp;
 	}
 
+	bh_lock_sock(parent);
+
 	/* Check if the ACL is secure enough (if not SDP) */
 	if (psm != cpu_to_le16(0x0001) &&
 				!hci_conn_check_link_mode(conn->hcon)) {
@@ -4464,6 +4458,8 @@ static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, str
 	if (!sk)
 		goto drop;
 
+	bh_lock_sock(sk);
+
 	BT_DBG("sk %p, len %d", sk, skb->len);
 
 	if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
-- 
1.7.3.1

[PATCH 2/2] Bluetooth: Get ride of __rfcomm_get_sock_by_channel()

[Gustavo F. Padovan]

rfcomm_get_sock_by_channel() was the only user of this function, so I merged
both into rfcomm_get_sock_by_channel(). The socket lock now should be hold
outside of rfcomm_get_sock_by_channel() once we hold and release it inside the
same function now.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---
 net/bluetooth/rfcomm/sock.c |   19 +++++++------------
 1 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index aec505f..0207bd6 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -140,11 +140,13 @@ static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src)
 /* Find socket with channel and source bdaddr.
  * Returns closest match.
  */
-static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
+static struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
 {
 	struct sock *sk = NULL, *sk1 = NULL;
 	struct hlist_node *node;
 
+	read_lock(&rfcomm_sk_list.lock);
+
 	sk_for_each(sk, node, &rfcomm_sk_list.head) {
 		if (state && sk->sk_state != state)
 			continue;
@@ -159,19 +161,10 @@ static struct sock *__rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t
 				sk1 = sk;
 		}
 	}
-	return node ? sk : sk1;
-}
 
-/* Find socket with given address (channel, src).
- * Returns locked socket */
-static inline struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src)
-{
-	struct sock *s;
-	read_lock(&rfcomm_sk_list.lock);
-	s = __rfcomm_get_sock_by_channel(state, channel, src);
-	if (s) bh_lock_sock(s);
 	read_unlock(&rfcomm_sk_list.lock);
-	return s;
+
+	return node ? sk : sk1;
 }
 
 static void rfcomm_sock_destruct(struct sock *sk)
@@ -945,6 +938,8 @@ int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc *
 	if (!parent)
 		return 0;
 
+	bh_lock_sock(parent);
+
 	/* Check for backlog size */
 	if (sk_acceptq_is_full(parent)) {
 		BT_DBG("backlog full %d", parent->sk_ack_backlog);
-- 
1.7.3.1

Re: [PATCH 2/2] Bluetooth: Get ride of __rfcomm_get_sock_by_channel()

[Gustavo F. Padovan]

* Gustavo F. Padovan <padovan@profusion.mobi> [2010-11-17 21:22:56 -0200]:

> rfcomm_get_sock_by_channel() was the only user of this function, so I merged
> both into rfcomm_get_sock_by_channel(). The socket lock now should be hold
> outside of rfcomm_get_sock_by_channel() once we hold and release it inside the
> same function now.
> 
> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
> ---
>  net/bluetooth/rfcomm/sock.c |   19 +++++++------------
>  1 files changed, 7 insertions(+), 12 deletions(-)

I'm also pushing these two to bluetooth-next. It should be good as
nobody commented on it, or people don't looked to it since there is a
clear typo and in commit messase (ride -> rid)

-- 
Gustavo F. Padovan
http://profusion.mobi