Age | Commit message (Collapse) | Author |
|
We simply say that regular this_cpu use must be safe regardless of
preemption and interrupt state. That has no material change for x86
and s390 implementations of this_cpu operations. However, arches that
do not provide their own implementation for this_cpu operations will
now get code generated that disables interrupts instead of preemption.
-tj: This is part of on-going percpu API cleanup. For detailed
discussion of the subject, please refer to the following thread.
http://thread.gmane.org/gmane.linux.kernel/1222078
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <alpine.DEB.2.00.1112221154380.11787@router.home>
|
|
To achive Man-In-The-Middle (MITM) level security with Low Energy,
we have to enable User Passkey Comparison. This commit modifies the
hard-coded JUST-WORKS pairing mechanism to support query via the MGMT
interface of Passkey comparison and User Confirmation.
Signed-off-by: Brian Gix <bgix@codeaurora.org>
Acked-by: Marcel Holtmann<marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
When cancelling a delayed work (timer) in L2CAP we can not sleep holding
the sock mutex otherwise we might deadlock with an L2CAP timer handler.
This is possible because RX/TX and L2CAP timers run in different workqueues.
The scenario below illustrates the problem. Thus we are now avoiding to
sleep on the timers locks.
======================================================
[ INFO: possible circular locking dependency detected ]
3.1.0-05270-ga978dc7-dirty #239
-------------------------------------------------------
kworker/1:1/873 is trying to acquire lock:
(sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}, at: [<ffffffffa002ceac>] l2cap_chan_timeout+0x3c/0xe0 [bluetooth]
but task is already holding lock:
((&(&chan->chan_timer)->work)){+.+...}, at: [<ffffffff81051a86>] process_one_work+0x126/0x450
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 ((&(&chan->chan_timer)->work)){+.+...}:
[<ffffffff8106b276>] check_prevs_add+0xf6/0x170
[<ffffffff8106b903>] validate_chain+0x613/0x790
[<ffffffff8106dfee>] __lock_acquire+0x4be/0xac0
[<ffffffff8106ec2d>] lock_acquire+0x8d/0xb0
[<ffffffff81052a6f>] wait_on_work+0x4f/0x160
[<ffffffff81052ca3>] __cancel_work_timer+0x73/0x80
[<ffffffff81052cbd>] cancel_delayed_work_sync+0xd/0x10
[<ffffffffa002f2ed>] l2cap_chan_connect+0x22d/0x470 [bluetooth]
[<ffffffffa002fb51>] l2cap_sock_connect+0xb1/0x140 [bluetooth]
[<ffffffff8130811b>] kernel_connect+0xb/0x10
[<ffffffffa00cf98a>] rfcomm_session_create+0x12a/0x1c0 [rfcomm]
[<ffffffffa00cfbe7>] __rfcomm_dlc_open+0x1c7/0x240 [rfcomm]
[<ffffffffa00d07c2>] rfcomm_dlc_open+0x42/0x70 [rfcomm]
[<ffffffffa00d3b03>] rfcomm_sock_connect+0x103/0x150 [rfcomm]
[<ffffffff8130bd7e>] sys_connect+0xae/0xc0
[<ffffffff813368d2>] compat_sys_socketcall+0xb2/0x220
[<ffffffff813b2089>] sysenter_dispatch+0x7/0x30
-> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}:
[<ffffffff8106b16d>] check_prev_add+0x6cd/0x6e0
[<ffffffff8106b276>] check_prevs_add+0xf6/0x170
[<ffffffff8106b903>] validate_chain+0x613/0x790
[<ffffffff8106dfee>] __lock_acquire+0x4be/0xac0
[<ffffffff8106ec2d>] lock_acquire+0x8d/0xb0
[<ffffffff8130d91a>] lock_sock_nested+0x8a/0xa0
[<ffffffffa002ceac>] l2cap_chan_timeout+0x3c/0xe0 [bluetooth]
[<ffffffff81051ae4>] process_one_work+0x184/0x450
[<ffffffff8105276e>] worker_thread+0x15e/0x340
[<ffffffff81057bb6>] kthread+0x96/0xa0
[<ffffffff813b1ef4>] kernel_thread_helper+0x4/0x10
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock((&(&chan->chan_timer)->work));
lock(sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP);
lock((&(&chan->chan_timer)->work));
lock(sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP);
*** DEADLOCK ***
2 locks held by kworker/1:1/873:
#0: (events){.+.+.+}, at: [<ffffffff81051a86>] process_one_work+0x126/0x450
#1: ((&(&chan->chan_timer)->work)){+.+...}, at: [<ffffffff81051a86>] process_one_work+0x126/0x450
stack backtrace:
Pid: 873, comm: kworker/1:1 Not tainted 3.1.0-05270-ga978dc7-dirty #239
Call Trace:
[<ffffffff813a0f6e>] print_circular_bug+0xd2/0xe3
[<ffffffff8106b16d>] check_prev_add+0x6cd/0x6e0
[<ffffffff8106b276>] check_prevs_add+0xf6/0x170
[<ffffffff8106b903>] validate_chain+0x613/0x790
[<ffffffff8106dfee>] __lock_acquire+0x4be/0xac0
[<ffffffff8130d8f6>] ? lock_sock_nested+0x66/0xa0
[<ffffffff8106ea30>] ? lock_release_nested+0x100/0x110
[<ffffffff8130d8f6>] ? lock_sock_nested+0x66/0xa0
[<ffffffff8106ec2d>] lock_acquire+0x8d/0xb0
[<ffffffffa002ceac>] ? l2cap_chan_timeout+0x3c/0xe0 [bluetooth]
[<ffffffff8130d91a>] lock_sock_nested+0x8a/0xa0
[<ffffffffa002ceac>] ? l2cap_chan_timeout+0x3c/0xe0 [bluetooth]
[<ffffffff81051a86>] ? process_one_work+0x126/0x450
[<ffffffffa002ceac>] l2cap_chan_timeout+0x3c/0xe0 [bluetooth]
[<ffffffff81051ae4>] process_one_work+0x184/0x450
[<ffffffff81051a86>] ? process_one_work+0x126/0x450
[<ffffffffa002ce70>] ? l2cap_security_cfm+0x4e0/0x4e0 [bluetooth]
[<ffffffff8105276e>] worker_thread+0x15e/0x340
[<ffffffff81052610>] ? manage_workers+0x110/0x110
[<ffffffff81057bb6>] kthread+0x96/0xa0
[<ffffffff813b1ef4>] kernel_thread_helper+0x4/0x10
[<ffffffff813af69d>] ? retint_restore_args+0xe/0xe
[<ffffffff81057b20>] ? __init_kthread_worker+0x70/0x70
[<ffffffff813b1ef0>] ? gs_change+0xb/0xb
Signed-off-by: Ulisses Furquim <ulisses@profusion.mobi>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
The struct hci_proto and all related register/unregister and dispatching
code was removed. HCI core code now call directly the SCO and L2CAP
event functions.
Signed-off-by: Ulisses Furquim <ulisses@profusion.mobi>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Make code readable by removing magic numbers.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
flow_cach_flush() might sleep but can be called from
atomic context via the xfrm garbage collector. So add
a flow_cache_flush_deferred() function and use this if
the xfrm garbage colector is invoked from within the
packet path.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
to record the state of SACK/FACK and DSACK for better readability and maintenance.
Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
The handling of SCO audio links and the L2CAP protocol are essential to
any system with Bluetooth thus are always compiled in from now on.
Signed-off-by: Ulisses Furquim <ulisses@profusion.mobi>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
It makes more sense this way, since info_timer is a timer using delayed
work API.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This one also needs to run in process context
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
It is the only place where it is used.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
af_iucv differs unnecessarily between state IUCV_SEVERED and
IUCV_DISCONN. This patch removes state IUCV_SEVERED.
While simplifying af_iucv, this patch removes the 2nd invocation of
cpcmd as well.
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
af_iucv contains timer infrastructure which is not exploited.
This patch removes the timer related code parts.
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
module_param(bool) used to counter-intuitively take an int. In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.
It's time to remove the int/unsigned int option. For this version
it'll simply give a warning, but it'll break next kernel version.
(Thanks to Joe Perches for suggesting coccinelle for 0/1 -> true/false).
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Commit 8ffd3208 voids the previous patches f6778aab and 810c0719 for
limiting the autoclose value. If userspace passes in -1 on 32-bit
platform, the overflow check didn't work and autoclose would be set
to 0xffffffff.
This patch defines a max_autoclose (in seconds) for limiting the value
and exposes it through sysctl, with the following intentions.
1) Avoid overflowing autoclose * HZ.
2) Keep the default autoclose bound consistent across 32- and 64-bit
platforms (INT_MAX / HZ in this patch).
3) Keep the autoclose value consistent between setsockopt() and
getsockopt() calls.
Suggested-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This reverts commit 5c3ddec73d01a1fae9409c197078cb02c42238c3.
S390 qeth driver actually still uses the setup ops.
Reported-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
When a peer changes SMPS state we should update
rate control so it doesn't have to detect it by
itself. It can't detect "dynamic" mode anyway
since that just requires rts-cts handshaking.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
|
|
If station info contains a beacon loss count, return
it to userspace.
Signed-off-by: Paul Stewart <pstew@chromium.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
|
|
This patch adds the necessary structs for the Confirm Name command. This
ensures that the protocol definitions are up to date with the latest
mgmt specification. The actual implementation of the command will follow
in a later patch-set.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This patch fixes the opcodes of the Block/Unblock device commands to
match with what user-space expects and to confirm with the latest mgmt
specification. The reason the values were wrong was a missing Confirm
Name command definition (which will be added by a subsequent patch).
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This patch adds a missing confirm_name field to mgmt_ev_device_found.
Support for setting the correct value for this field is not implemented
yet, but having it part of the struct definition ensures that user-space
gets correct sized device_found events and is thereby able to do at
least rudimentary parsing of them.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Implement block size read function. Use different variables for
packet-based and block-based flow control.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This patch updates the ordering and opcodes of mgmt messages to match
the latest API specification.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
We do not want the service cache to be enabled indefinitely after
mgmt_read_info is called. To solve this a timer is added which will
automatically disable the cache if mgmt_set_dev_class isn't called
within 5 seconds of calling mgmt_read_info.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Instead of having an explicit service cache command we can make the mgmt
API simpler by implicitly enabling the cache when mgmt_read_info is
called for the first time and disabling it when mgmt_set_dev_class is
called.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Fast connectable is logically after the connectable property so that's
where it should show up in the code as well (it's also after connectable
in the settings bitfield).
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This patch updates the mgmt_read_info and related messages to the latest
management API which uses a bitfield of settings instead of individual
boolean values.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
As we run in process context now we don't need worqueue to add e del from
sysfs.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This move some checking code that was in l2cap_sock_connect() to
l2cap_chan_connect(). Thus we can invert the lock calls, i.e., call
lock_sock() before hci_dev_lock() to avoid a deadlock scenario.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Another step of remove interrupt context from Bluetooth Core.
Use the system workqueue.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
This should simplify Bluetooth core processing a lot.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
As part of the moving on all the Bluetooth processing to Process context.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Handling hci_conn_hash with RCU make us avoid some locking and disable
tasklets.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
spin lock doesn't fit ok anymore on the new code based on workqueues.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
L2CAP timers also need to run in process context. As the works in l2cap
are small we are using the system worqueue.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
As HCI rx path is now done in process context it makes sense to do all the
timer in process context as well.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Bluetooth rx task runs now in a workqueue, so it a good approach run any
timer that share locking with process context code also in a workqueue.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Now we run everything in HCI in process context, so it's a better idea use
mutex instead spin_lock. The macro remains hci_dev_lock() (and I got rid
of hci_dev_lock_bh()), of course.
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Run recv process in workqueue helps a lot with our processing as the recv
path will also be in the process context, i.e., now all our tx and rx are
in process context.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
We can use atomic64_t infrastructure to avoid taking a spinlock in fast
path, and remove inaccuracies while reading values in
ctnetlink_dump_counters() and connbytes_mt() on 32bit arches.
Suggested by Pablo.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
|
It isn't used outside hci_conn.c
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: David S. Miller <davem@davemloft.net>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
le_num needs to be set to zero.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
It isn't used anywhere.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Only the list member of the struct was used, so we now fold it into
hci_conn.
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
|
|
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|