pull request: bluetooth 2012-05-04

Hi John,

* John W. Linville <linville@tuxdriver.com> [2012-05-12 14:22:27 -0400]:

> On Fri, May 11, 2012 at 05:16:20PM -0300, Gustavo Padovan wrote:
> > Hi Dave,
> > 
> > I couldn't get this pull by John this week, he's been unresponsive.
> > We would love to see this code in the 3.4 kernel (not sure if this would be
> > possible if Linus do not release the -rc7, there are important fixes 
> > in the pull request, such as a fix to a regression that was breaking bluetooth
> > keyboards.
> > 
> > Please let me know if you have any problems with this! I checked this code for
> > coding style issues too. Thanks.
> 
> Well, I do apologize for my lack of responsiveness.  My employer saw
> fit to have me (figuratively) locked in a room with no email access all
> week, with me getting home rather late in the evenings and returning
> early each morning.  I would have liked to have stayed awake for
> hours each night catching-up, but I just didn't have the strength. :-(
> 
> With that said, I'm not at all sure that this batch of fixes is
> appropriate for this late in the release cycle.  Normally at this
> point I would expect to see "regression cause by commit 1234" or
> "this common action results in this crash", all fixed by one-liners
> wherever possible.  This batch is more like "causes some problems",
> or "needs to be different" -- neither of which sound urgent enough
> to be worth requesting delays in Linus's release schedule.


In my point of view there are two commits there that are really necessary:

Gustavo Padovan (2):
      Bluetooth: report the right security level in getsockopt

Johan Hedberg (2):
      Bluetooth: mgmt: Fix device_connected sending order

They fix a userspace breakage caused by:

Author: Marcel Holtmann <marcel@holtmann.org>
Date:   Mon Feb 20 21:24:37 2012 +0100

    Bluetooth: Always enable management interface
    
    The management interface API has reached stable version 1.0 and thus
    it can now be always enabled. All future changes will be made backwards
    compatible.
    
    Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
    Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>


This cause no crash, but it make bluetooth keyboards stop to work with Linux.
This a serious breakage IMO. I really would like to see at least these two
patches in. The other fixes can wait.
 
	Gustavo

---

The following changes since commit 985140369be1e886754d8ac0375dd64e4f727311:

  Add Foxconn / Hon Hai IDs for btusb module (2012-04-24 11:38:41 -0300)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth for-upstream

for you to fetch changes up to 3ca67a07a20880c78bfce52017956c1472db69ff:

  Bluetooth: mgmt: Fix device_connected sending order (2012-05-12 16:02:06 -0300)

----------------------------------------------------------------
Gustavo Padovan (1):
      Bluetooth: notify userspace of security level change

Johan Hedberg (1):
      Bluetooth: mgmt: Fix device_connected sending order

 include/net/bluetooth/bluetooth.h |    1 +
 net/bluetooth/af_bluetooth.c      |    2 +-
 net/bluetooth/hci_core.c          |    8 ++++++++
 net/bluetooth/hci_event.c         |   11 +++++++++--
 net/bluetooth/l2cap_core.c        |    5 +++++
 net/bluetooth/l2cap_sock.c        |   15 ++++++++++-----
 6 files changed, 34 insertions(+), 8 deletions(-)
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Hi,

On Sat, May 12, 2012, Gustavo Padovan wrote:
> In my point of view there are two commits there that are really necessary:
> 
> Gustavo Padovan (2):
>       Bluetooth: report the right security level in getsockopt
> 
> Johan Hedberg (2):
>       Bluetooth: mgmt: Fix device_connected sending order
> 
> They fix a userspace breakage caused by:
> 
> Author: Marcel Holtmann <marcel@holtmann.org>
> Date:   Mon Feb 20 21:24:37 2012 +0100
> 
>     Bluetooth: Always enable management interface
>     
>     The management interface API has reached stable version 1.0 and thus
>     it can now be always enabled. All future changes will be made backwards
>     compatible.
>     
>     Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
>     Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
> 
> 
> This cause no crash, but it make bluetooth keyboards stop to work with Linux.
> This a serious breakage IMO. I really would like to see at least these two
> patches in. The other fixes can wait.

I'd just like to add some further background since I don't think it's
that obvious how these are regression fixes:

The device_connected fix should be quite self-explanatory, but it's
actually a wider issue than just for keyboards. All profiles that do
incoming connection authorization (e.g. headsets) will break without it
with specific hardware. The reason it wasn't caught earlier is that it
only occurs with specific Bluetooth adapters.

As for the security level patch, this fixes L2CAP socket based security
level elevation during a connection. The HID profile needs this (for
keyboards) and it is the only way to achieve the security level
elevation when using the management interface to talk to the kernel
(hence the management enabling patch being the one that exposes this
issue).

Johan
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