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author | Dave Young <hidave.darkstar@gmail.com> | 2008-04-01 23:58:35 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-04-01 23:58:35 -0700 |
commit | 68845cb2c82275efd7390026bba70c320ca6ef86 (patch) | |
tree | d28413ecb9e8695bc3292386d3cfacb76928a668 /net/bluetooth | |
parent | 4965291acf8cc2c31dcb2fc7d292a04ee08da2dd (diff) | |
download | kernel_samsung_smdk4412-68845cb2c82275efd7390026bba70c320ca6ef86.zip kernel_samsung_smdk4412-68845cb2c82275efd7390026bba70c320ca6ef86.tar.gz kernel_samsung_smdk4412-68845cb2c82275efd7390026bba70c320ca6ef86.tar.bz2 |
bluetooth : use lockdep sub-classes for diffrent bluetooth protocol
'rfcomm connect' will trigger lockdep warnings which is caused by
locking diffrent kinds of bluetooth sockets at the same time.
So using sub-classes per AF_BLUETOOTH sub-type for lockdep.
Thanks for the hints from dave jones.
---
> From: Dave Jones <davej@codemonkey.org.uk>
> Date: Thu, 27 Mar 2008 12:21:56 -0400
>
> > Mar 27 08:10:57 localhost kernel: Pid: 3611, comm: obex-data-serve Not tainted 2.6.25-0.121.rc5.git4.fc9 #1
> > Mar 27 08:10:57 localhost kernel: [__lock_acquire+2287/3089] __lock_acquire+0x8ef/0xc11
> > Mar 27 08:10:57 localhost kernel: [sched_clock+8/11] ? sched_clock+0x8/0xb
> > Mar 27 08:10:57 localhost kernel: [lock_acquire+106/144] lock_acquire+0x6a/0x90
> > Mar 27 08:10:57 localhost kernel: [<f8bd9321>] ? l2cap_sock_bind+0x29/0x108 [l2cap]
> > Mar 27 08:10:57 localhost kernel: [lock_sock_nested+182/198] lock_sock_nested+0xb6/0xc6
> > Mar 27 08:10:57 localhost kernel: [<f8bd9321>] ? l2cap_sock_bind+0x29/0x108 [l2cap]
> > Mar 27 08:10:57 localhost kernel: [security_socket_post_create+22/27] ? security_socket_post_create+0x16/0x1b
> > Mar 27 08:10:57 localhost kernel: [__sock_create+388/472] ? __sock_create+0x184/0x1d8
> > Mar 27 08:10:57 localhost kernel: [<f8bd9321>] l2cap_sock_bind+0x29/0x108 [l2cap]
> > Mar 27 08:10:57 localhost kernel: [kernel_bind+10/13] kernel_bind+0xa/0xd
> > Mar 27 08:10:57 localhost kernel: [<f8dad3d7>] rfcomm_dlc_open+0xc8/0x294 [rfcomm]
> > Mar 27 08:10:57 localhost kernel: [lock_sock_nested+187/198] ? lock_sock_nested+0xbb/0xc6
> > Mar 27 08:10:57 localhost kernel: [<f8dae18c>] rfcomm_sock_connect+0x8b/0xc2 [rfcomm]
> > Mar 27 08:10:57 localhost kernel: [sys_connect+96/125] sys_connect+0x60/0x7d
> > Mar 27 08:10:57 localhost kernel: [__lock_acquire+1370/3089] ? __lock_acquire+0x55a/0xc11
> > Mar 27 08:10:57 localhost kernel: [sys_socketcall+140/392] sys_socketcall+0x8c/0x188
> > Mar 27 08:10:57 localhost kernel: [syscall_call+7/11] syscall_call+0x7/0xb
---
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bluetooth')
-rw-r--r-- | net/bluetooth/af_bluetooth.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 1220d8a..d366423 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -53,6 +53,30 @@ /* Bluetooth sockets */ #define BT_MAX_PROTO 8 static struct net_proto_family *bt_proto[BT_MAX_PROTO]; + +static struct lock_class_key bt_slock_key[BT_MAX_PROTO]; +static struct lock_class_key bt_lock_key[BT_MAX_PROTO]; +static const char *bt_key_strings[BT_MAX_PROTO] = { + "sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP", + "sk_lock-AF_BLUETOOTH-BTPROTO_HCI", + "sk_lock-AF_BLUETOOTH-BTPROTO_SCO", + "sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM", + "sk_lock-AF_BLUETOOTH-BTPROTO_BNEP", + "sk_lock-AF_BLUETOOTH-BTPROTO_CMTP", + "sk_lock-AF_BLUETOOTH-BTPROTO_HIDP", + "sk_lock-AF_BLUETOOTH-BTPROTO_AVDTP", +}; + +static const char *bt_slock_key_strings[BT_MAX_PROTO] = { + "slock-AF_BLUETOOTH-BTPROTO_L2CAP", + "slock-AF_BLUETOOTH-BTPROTO_HCI", + "slock-AF_BLUETOOTH-BTPROTO_SCO", + "slock-AF_BLUETOOTH-BTPROTO_RFCOMM", + "slock-AF_BLUETOOTH-BTPROTO_BNEP", + "slock-AF_BLUETOOTH-BTPROTO_CMTP", + "slock-AF_BLUETOOTH-BTPROTO_HIDP", + "slock-AF_BLUETOOTH-BTPROTO_AVDTP", +}; static DEFINE_RWLOCK(bt_proto_lock); int bt_sock_register(int proto, struct net_proto_family *ops) @@ -95,6 +119,21 @@ int bt_sock_unregister(int proto) } EXPORT_SYMBOL(bt_sock_unregister); +static void bt_reclassify_sock_lock(struct socket *sock, int proto) +{ + struct sock *sk = sock->sk; + + if (!sk) + return; + BUG_ON(sock_owned_by_user(sk)); + + sock_lock_init_class_and_name(sk, + bt_slock_key_strings[proto], + &bt_slock_key[proto], + bt_key_strings[proto], + &bt_lock_key[proto]); +} + static int bt_sock_create(struct net *net, struct socket *sock, int proto) { int err; @@ -117,6 +156,7 @@ static int bt_sock_create(struct net *net, struct socket *sock, int proto) if (bt_proto[proto] && try_module_get(bt_proto[proto]->owner)) { err = bt_proto[proto]->create(net, sock, proto); + bt_reclassify_sock_lock(sock, proto); module_put(bt_proto[proto]->owner); } |