mac80211/mesh: make the preq queue lock consistent

Make mesh_preq_queue_lock locking consistent with mesh_queue_preq() using
spin_lock_bh().

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 987dafad11bbf0454c88bd3b37461f7f2a423f71)
net: cleanup some rcu_dereference_raw

RCU api had been completed and rcu_access_pointer() or
rcu_dereference_protected() are better than generic
rcu_dereference_raw()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 33d480ce6d43326e2541fd79b3548858a174ec3c)
wireless: Introduce defines for BAR TID_INFO & MULTI_TID fields

While at it also fix the indention of the other IEEE80211_BAR_CTRL_ defines.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit c1407b6cb22245ae8653cfc195530a9b8eb52879)
mac80211: improve mpath debugging

make hwmp_dbg print the relevant sdata->name by default and improve
formatting. Also add mpath_dbg macro for debugging of mesh path
operations.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 7646887a5390123475fdd621620b9f270b38df98)
mac80211: fix mpath timer NULL function

If we have an mpath whose timer has not been initialized, don't try to
delete it.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 86d7f9f35dcc686d57465798201e678040916979)
mac80211: fix mesh path flushing

Previously, mpaths were never flushed since the mpath is not active once
we call this function.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 00e3f25c8556384bfec2a168c41e885fa6a7748c)
{nl,mac}80211: add missing root mode meshconf entries

This fix allows userspace to mark a meshif as a root node.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 699403dbd41998a56d1d92d612ac261e5085a99f)
mac80211: refactor sta_info_insert_rcu to 3 main stages

Divided the sta_info_insert_rcu function to 3 mini-functions:
sta_info_insert_check - the initial checks done when inserting
a new station
sta_info_insert_ibss - the function that handles the station
addition for IBSS interfaces
sta_info_insert_non_ibss - the function that handles the station
addition in other cases

The outer API was not changed.
The refactoring was done for better usage of the different
stages in the station addition in new scenarios added
in the next commit.

Signed-off-by: Guy Eilam <guy@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 8c71df7a2f6a5345d6cad34e810c50edeca81521)
mac80211: fix race condition between assoc_done and first EAP packet

When associating to an AP, the station might miss the first EAP
packet that the AP sends due to a race condition between the association
success procedure and the rx flow in mac80211.
In such cases, the packet might fall in ieee80211_rx_h_check due to
the fact that the relevant rx->sta wasn't allocated yet.
Allocation of the relevant station info struct before actually
sending the association request and setting it with a new
dummy_sta flag solve this problem.
The station will accept only EAP packets from the AP while it
is in the pre-association/dummy state.
This dummy station entry is not seen by normal sta_info_get()
calls, only by sta_info_get_bss_rx().
The driver is not notified for the first insertion of the
dummy station. The driver is notified only after the association
is complete and the dummy flag is removed from the station entry.
That way, all the rest of the code flow should be untouched by
this change.

Signed-off-by: Guy Eilam <guy@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 2a33bee2753bf28411de8822e3e3c7501966eb1b)
mac80211: allow action frames with unknown BSSID in GO mode

When operating as a P2P GO, we receive some P2P action frames where the
BSSID is set to the peer MAC address. Specifically, this occurs for
invitation responses. These are valid action frames and they should be
passed up.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit a21fa87e3a3a8390f17f53967baa574f4e1e1e76)
net/mac80211/debugfs: Convert to kstrou8_from_user

This patch replaces the code for getting an number from a
userspace buffer by a simple call to kstrou8_from_user.
This makes it easier to read and less error prone.

Since the old buffer was only 10 bytes long and the value is masked by a
nibble-mask anyway, we don't need to use kstrtoul but rather kstrtou8.

Kernel Version: v3.0-rc2

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit b38de31ffa870323c4f6957904303477c88fe905)
mac80211: Defer tranmission of mesh path errors

Under failure conditions, the mesh stack sends PERR messages to the
previous sender of the failed frame.  This happens in the tx feedback
path, in which the transmission queue lock may be taken.  Avoid a
deadlock by sending the path error via the pending queue.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 2cca397f76a4a48ac20c34ec1e35bac8c6b08d1c)
mac80211: retry sending failed BAR frames later instead of tearing down aggr

Unfortunately failed BAR tx attempts happen more frequently than I
expected, and the resulting aggregation teardowns cause performance
issues, as the aggregation session does not always get re-established
properly.
Instead of tearing down the entire aggr session, we can simply store the
SSN of the last failed BAR tx attempt, wait for the first successful
tx status event, and then send another BAR with the same SSN.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit f0425beda4d404a6e751439b562100b902ba9c98)
mac80211: Fix RCU pointer dereference in mesh_path_discard_frame()

Reported by Pedro Larbig (ASPj)

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit af089c15cb13e1c5d984e41f495c8363dd5b1e30)
mac80211: Remove mesh paths when an interface is removed

When an interface is removed, the mesh paths associated with it should
also be removed.

This fixes a bug we observed when reloading a device driver module
without reloading mac80211s.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit ece1a2e7e86078c8379937b546e32cb7f25fcb6c)
mac80211: Remove redundant mesh path expiration checks

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit ad99d141144c4996c810fe75f04c387214ca360a)
mac80211: Remove unnecessary OOM logging messages

Removing unnecessary messages saves code and text.

Site specific OOM messages are duplications of a generic MM
out of memory message and aren't really useful, so just
delete them.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit d15b84590a1d2ec021ada00a0e67ee5851a0ea2b)
mac80211: add flag to indicate HW only Tx-agg setup support

When this flag is set, Tx A-MPDU sessions will not be started by
mac80211. This flag is required for devices that support Tx A-MPDU setup
in hardware.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit edf6b784c0e574696915e7b04fe42158f3112d0d)
mac80211: check if mesh frame is in RMC after decrypt

To check whether a frame is in the RMC, we need access to the mesh
header.  This header is encrypted in encrypted data frames, so make this
check after the frame has been decrypted.

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit 2157fdd6ae3f760a95c5c50072a1b4ac656eb9f5)
mac80211: Stop forwarding mesh traffic when tx queues are full

Tx flow control for non-mesh modes of operation only needs to act on the
net device queues: when the hardware queues are full we stop accepting
traffic from the net device.  In mesh, however, we also need to stop
forwarding traffic.  This patch checks the hardware queues before
attempting to forward a mesh frame.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
(cherry picked from commit cfee66b0f9891fc2b79a238e737308a2732365d2)