From: Andrei Emeltchenko <Andrei.Emeltchenko.news@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCHv1 10/14] Bluetooth: Use chan lock in receiving data
Date: Tue, 21 Feb 2012 12:55:03 +0200 [thread overview]
Message-ID: <1329821707-11817-11-git-send-email-Andrei.Emeltchenko.news@gmail.com> (raw)
In-Reply-To: <1329821707-11817-1-git-send-email-Andrei.Emeltchenko.news@gmail.com>
From: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Change locking logic when receiving ACL and L2CAP data.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
---
net/bluetooth/l2cap_core.c | 11 +++++------
net/bluetooth/l2cap_sock.c | 11 +++++++++--
2 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index d5380ce..24c7729 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4262,7 +4262,6 @@ drop:
static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb)
{
struct l2cap_chan *chan;
- struct sock *sk = NULL;
u32 control;
u16 tx_seq;
int len;
@@ -4270,11 +4269,12 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk
chan = l2cap_get_chan_by_scid(conn, cid);
if (!chan) {
BT_DBG("unknown cid 0x%4.4x", cid);
- goto drop;
+ /* Drop packet and return */
+ kfree(skb);
+ return 0;
}
- sk = chan->sk;
- lock_sock(sk);
+ l2cap_chan_lock(chan);
BT_DBG("chan %p, len %d", chan, skb->len);
@@ -4345,8 +4345,7 @@ drop:
kfree_skb(skb);
done:
- if (sk)
- release_sock(sk);
+ l2cap_chan_unlock(chan);
return 0;
}
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index db38fae..a278858 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -877,8 +877,12 @@ static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb)
struct sock *sk = data;
struct l2cap_pinfo *pi = l2cap_pi(sk);
- if (pi->rx_busy_skb)
- return -ENOMEM;
+ lock_sock(sk);
+
+ if (pi->rx_busy_skb) {
+ err = -ENOMEM;
+ goto done;
+ }
err = sock_queue_rcv_skb(sk, skb);
@@ -897,6 +901,9 @@ static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb)
err = 0;
}
+done:
+ release_sock(sk);
+
return err;
}
--
1.7.9
next prev parent reply other threads:[~2012-02-21 10:55 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-21 10:54 [PATCHv1 00/14] Bluetooth: Change socket lock to l2cap_chan lock Andrei Emeltchenko
2012-02-21 10:54 ` [PATCHv1 01/14] Bluetooth: trivial: Fix long line Andrei Emeltchenko
2012-02-21 10:54 ` [PATCHv1 02/14] Bluetooth: Revert to mutexes from RCU list Andrei Emeltchenko
2012-02-21 10:54 ` [PATCHv1 03/14] Bluetooth: Add l2cap_chan_lock Andrei Emeltchenko
2012-02-21 16:51 ` Ulisses Furquim
2012-02-21 17:25 ` Gustavo Padovan
2012-02-21 10:54 ` [PATCHv1 04/14] Bluetooth: Add locked and unlocked state_change Andrei Emeltchenko
2012-02-21 16:52 ` Ulisses Furquim
2012-02-21 17:26 ` Gustavo Padovan
2012-02-21 10:54 ` [PATCHv1 05/14] Bluetooth: Add socket error function Andrei Emeltchenko
2012-02-21 16:57 ` Ulisses Furquim
2012-02-21 17:27 ` Gustavo Padovan
2012-02-21 10:54 ` [PATCHv1 06/14] Bluetooth: Add unlocked __l2cap_chan_add function Andrei Emeltchenko
2012-02-21 17:01 ` Ulisses Furquim
2012-02-22 9:25 ` Andrei Emeltchenko
2012-02-21 17:28 ` Gustavo Padovan
2012-02-21 10:55 ` [PATCHv1 07/14] Bluetooth: Use chan lock in timers Andrei Emeltchenko
2012-02-21 17:06 ` Ulisses Furquim
2012-02-21 10:55 ` [PATCHv1 08/14] Bluetooth: Use chan lock in L2CAP sig commands Andrei Emeltchenko
2012-02-21 17:18 ` Ulisses Furquim
2012-02-21 17:57 ` Gustavo Padovan
2012-02-21 10:55 ` [PATCHv1 09/14] Bluetooth: Use chan lock in L2CAP conn start Andrei Emeltchenko
2012-02-21 17:20 ` Ulisses Furquim
2012-02-21 10:55 ` Andrei Emeltchenko [this message]
2012-02-21 20:28 ` [PATCHv1 10/14] Bluetooth: Use chan lock in receiving data Ulisses Furquim
2012-02-21 10:55 ` [PATCHv1 11/14] Bluetooth: Change locking logic for conn/chan ready Andrei Emeltchenko
2012-02-21 17:31 ` Ulisses Furquim
2012-02-21 10:55 ` [PATCHv1 12/14] Bluetooth: Change locking logic in security_cfm Andrei Emeltchenko
2012-02-21 17:32 ` Ulisses Furquim
2012-02-21 17:56 ` Gustavo Padovan
2012-02-21 20:44 ` Andrei Emeltchenko
2012-02-21 21:18 ` Ulisses Furquim
2012-02-21 10:55 ` [PATCHv1 13/14] Bluetooth: Use l2cap chan lock in socket connect Andrei Emeltchenko
2012-02-21 17:36 ` Ulisses Furquim
2012-02-21 17:46 ` Gustavo Padovan
2012-02-22 9:53 ` Andrei Emeltchenko
2012-02-21 10:55 ` [PATCHv1 14/14] Bluetooth: Remove socket lock check Andrei Emeltchenko
2012-02-21 17:37 ` Ulisses Furquim
2012-02-22 9:59 ` Andrei Emeltchenko
2012-02-21 17:51 ` Gustavo Padovan
2012-02-21 19:24 ` [PATCHv1 00/14] Bluetooth: Change socket lock to l2cap_chan lock Johan Hedberg
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