Commit Graph

4369 Commits

Author SHA1 Message Date
Luciano Coelho
5a865bad44 nl80211/cfg80211: add max_sched_scan_ie_len in the hw description
Some chips may support different lengths of user-supplied IEs with a
single scheduled scan command than with a single normal scan command.

To support this, this patch creates a separate hardware description
element that describes the maximum size of user-supplied information
element data supported in scheduled scans.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-15 13:38:30 -04:00
Luciano Coelho
93b6aa693a nl80211/cfg80211: add max_sched_scan_ssids in the hw description
Some chips can scan more SSIDs with a single scheduled scan command
than with a single normal scan command (eg. wl12xx chips).

To support this, this patch creates a separate hardware description
element that describes the amount of SSIDs supported in scheduled
scans.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-15 13:38:29 -04:00
Johannes Berg
77dbbb1389 nl80211: advertise GTK rekey support, new triggers
Since we now have the necessary API in place to support
GTK rekeying, applications will need to know whether it
is supported by a device. Add a pseudo-trigger that is
used only to advertise that capability. Also, add some
new triggers that match what iwlagn devices can do.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-15 13:38:28 -04:00
John W. Linville
95a943c162 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
Conflicts:
	net/bluetooth/l2cap_core.c
2011-07-15 10:05:24 -04:00
David S. Miller
6a7ebdf2fd Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
	net/bluetooth/l2cap_core.c
2011-07-14 07:56:40 -07:00
David S. Miller
f6b72b6217 net: Embed hh_cache inside of struct neighbour.
Now that there is a one-to-one correspondance between neighbour
and hh_cache entries, we no longer need:

1) dynamic allocation
2) attachment to dst->hh
3) refcounting

Initialization of the hh_cache entry is indicated by hh_len
being non-zero, and such initialization is always done with
the neighbour's lock held as a writer.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-14 07:53:20 -07:00
Johannes Berg
95acac61ba mac80211: allow driver to disconnect after resume
In WoWLAN, devices may use crypto keys for TX/RX
and could also implement GTK rekeying. If the
driver isn't able to retrieve replay counters and
similar information from the device upon resume,
or if the device isn't responsive due to platform
issues, it isn't safe to keep the connection up
as GTK rekey messages from during the sleep time
could be replayed against it.

The only protection against that is disconnecting
from the AP. Modifying mac80211 to do that while
it is resuming would be very complex and invasive
in the case that the driver requires a reconfig,
so do it after it has resumed completely. In that
case, however, packets might be replayed since it
can then only happen after TX/RX are up again, so
mark keys for interfaces that need to disconnect
as "tainted" and drop all packets that are sent
or received with those keys.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-13 14:49:43 -04:00
David Miller
3769cffb1c ipv4: Inline neigh binding.
Get rid of all of the useless and costly indirection
by doing the neigh hash table lookup directly inside
of the neighbour binding.

Rename from arp_bind_neighbour to rt_bind_neighbour.

Use new helpers {__,}ipv4_neigh_lookup()

In rt_bind_neighbour() get rid of useless tests which
are never true in the context this function is called,
namely dev is never NULL and the dst->neighbour is
always NULL.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-13 01:12:28 -07:00
Johannes Berg
af71ff8504 cfg80211: fix docbook
Looks like I forgot to document the "gfp" parameter
to cfg80211_gtk_rekey_notify, add it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-11 15:02:18 -04:00
Meenakshi Venkataraman
615f7b9bb1 mac80211: add driver RSSI threshold events
mac80211 maintains a running average of the RSSI when a STA
is associated to an AP. Report threshold events to any driver
that has registered callbacks for getting RSSI measurements.

Implement callbacks in mac80211 so that driver can set thresholds.
Add callbacks in mac80211 which is invoked when an RSSI threshold
event occurs.

mac80211: add tracing to rssi_reports api and remove extraneous fn argument
mac80211: scale up rssi thresholds from driver by 16 before storing

Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-11 15:02:06 -04:00
John W. Linville
4b42c542af Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/padovan/bluetooth-next-2.6
Conflicts:
	net/bluetooth/l2cap_core.c
2011-07-11 14:58:22 -04:00
Jiri Kosina
b7e9c223be Merge branch 'master' into for-next
Sync with Linus' tree to be able to apply pending patches that
are based on newer code already present upstream.
2011-07-11 14:15:55 +02:00
David S. Miller
f610b74b14 ipv4: Use universal hash for ARP.
We need to make sure the multiplier is odd.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11 01:37:28 -07:00
David S. Miller
cd0893369c neigh: Store hash shift instead of mask.
And mask the hash function result by simply shifting
down the "->hash_shift" most significant bits.

Currently which bits we use is arbitrary since jhash
produces entropy evenly across the whole hash function
result.

But soon we'll be using universal hashing functions,
and in those cases more entropy exists in the higher
bits than the lower bits, because they use multiplies.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-11 01:28:12 -07:00
Ilia Kolomisnky
e2fd318e3a Bluetooth: Fixes l2cap "command reject" reply according to spec
There can 3 reasons for the "command reject" reply produced
by the stack. Each such reply should be accompanied by the
relevand data ( as defined in spec. ). Currently there is one
instance of "command reject" reply with reason "invalid cid"
wich is fixed. Also, added clean-up definitions related to the
"command reject" replies.

Signed-off-by: Ilia Kolomisnky <iliak@ti.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-11 01:43:25 -03:00
Vinicius Costa Gomes
8f36011924 Bluetooth: Add support for returning the encryption key size
This will be useful when userspace wants to restrict some kinds of
operations based on the length of the key size used to encrypt the
link.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-08 18:39:31 -03:00
Vinicius Costa Gomes
726b4ffcaa Bluetooth: Add support for storing the key size
In some cases it will be useful having the key size used for
encrypting the link. For example, some profiles may restrict
some operations depending on the key length.

The key size is stored in the key that is passed to userspace
using the pin_length field in the key structure.

For now this field is only valid for LE controllers. 3.0+HS
controllers define the Read Encryption Key Size command, this
field is intended for storing the value returned by that
command.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-08 18:39:19 -03:00
Vinicius Costa Gomes
0eb08e3398 Bluetooth: Remove unused field in hci_conn
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-08 17:37:22 -03:00
Vinicius Costa Gomes
75d262c2ad Bluetooth: Add functions to manipulate the link key list for SMP
As the LTK (the new type of key being handled now) has more data
associated with it, we need to store this extra data and retrieve
the keys based on that data.

Methods for searching for a key and for adding a new LTK are
introduced here.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-08 17:36:31 -03:00
Vinicius Costa Gomes
34918cd71b Bluetooth: Add new structures for supporting SM key distribution
We need these changes because SMP keys may have more information
associated with them, for example, in the LTK case, it has an
encrypted diversifier (ediv) and a random number (rand).

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-08 17:36:25 -03:00
Michal Hocko
d8bf4ca9ca rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
Since ca5ecddf (rcu: define __rcu address space modifier for sparse)
rcu_dereference_check use rcu_read_lock_held as a part of condition
automatically so callers do not have to do that as well.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-07-08 22:21:58 +02:00
Vinicius Costa Gomes
7034b911af Bluetooth: Add support for SMP phase 3 (key distribution)
This adds support for generating and distributing all the keys
specified in the third phase of SMP.

This will make possible to re-establish secure connections, resolve
private addresses and sign commands.

For now, the values generated are random.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-08 17:07:43 -03:00
Thomas Graf
cd4fcc704f sctp: ABORT if receive, reassmbly, or reodering queue is not empty while closing socket
Trigger user ABORT if application closes a socket which has data
queued on the socket receive queue or chunks waiting on the
reassembly or ordering queue as this would imply data being lost
which defeats the point of a graceful shutdown.

This behavior is already practiced in TCP.

We do not check the input queue because that would mean to parse
all chunks on it to look for unacknowledged data which seems too
much of an effort. Control chunks or duplicated chunks may also
be in the input queue and should not be stopping a graceful
shutdown.

Signed-off-by: Thomas Graf <tgraf@infradead.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-08 09:53:08 -07:00
Johannes Berg
42d9879550 mac80211: allow driver to generate P1K for IV32
In order to support pre-populating the P1K cache in
iwlwifi hardware for WoWLAN, we need to calculate
the P1K for the current IV32. Allow drivers to get
the P1K for any given IV32 instead of for a given
packet, but keep the packet-based version around as
an inline.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-08 11:42:23 -04:00
Johannes Berg
3ea542d3c2 mac80211: allow drivers to access key sequence counter
In order to implement GTK rekeying, the device needs
to be able to encrypt frames with the right PN/IV and
check the PN/IV in RX frames. To be able to tell it
about all those counters, we need to be able to get
them from mac80211, this adds the required API.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-08 11:42:22 -04:00
Johannes Berg
523b02ea23 mac80211: fix TKIP races, make API easier to use
Our current TKIP code races against itself on TX
since we can process multiple packets at the same
time on different ACs, but they all share the TX
context for TKIP. This can lead to bad IVs etc.

Also, the crypto offload helper code just obtains
the P1K/P2K from the cache, and can update it as
well, but there's no guarantee that packets are
really processed in order.

To fix these issues, first introduce a spinlock
that will protect the IV16/IV32 values in the TX
context. This first step makes sure that we don't
assign the same IV multiple times or get confused
in other ways.

Secondly, change the way the P1K cache works. I
add a field "p1k_iv32" that stores the value of
the IV32 when the P1K was last recomputed, and
if different from the last time, then a new P1K
is recomputed. This can cause the P1K computation
to flip back and forth if packets are processed
out of order. All this also happens under the new
spinlock.

Finally, because there are argument differences,
split up the ieee80211_get_tkip_key() API into
ieee80211_get_tkip_p1k() and ieee80211_get_tkip_p2k()
and give them the correct arguments.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-08 11:11:19 -04:00
John W. Linville
204d1641d2 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-08 11:03:36 -04:00
Thomas Graf
f8d9605243 sctp: Enforce retransmission limit during shutdown
When initiating a graceful shutdown while having data chunks
on the retransmission queue with a peer which is in zero
window mode the shutdown is never completed because the
retransmission error count is reset periodically by the
following two rules:

 - Do not timeout association while doing zero window probe.
 - Reset overall error count when a heartbeat request has
   been acknowledged.

The graceful shutdown will wait for all outstanding TSN to
be acknowledged before sending the SHUTDOWN request. This
never happens due to the peer's zero window not acknowledging
the continuously retransmitted data chunks. Although the
error counter is incremented for each failed retransmission,
the receiving of the SACK announcing the zero window clears
the error count again immediately. Also heartbeat requests
continue to be sent periodically. The peer acknowledges these
requests causing the error counter to be reset as well.

This patch changes behaviour to only reset the overall error
counter for the above rules while not in shutdown. After
reaching the maximum number of retransmission attempts, the
T5 shutdown guard timer is scheduled to give the receiver
some additional time to recover. The timer is stopped as soon
as the receiver acknowledges any data.

The issue can be easily reproduced by establishing a sctp
association over the loopback device, constantly queueing
data at the sender while not reading any at the receiver.
Wait for the window to reach zero, then initiate a shutdown
by killing both processes simultaneously. The association
will never be freed and the chunks on the retransmission
queue will be retransmitted indefinitely.

Signed-off-by: Thomas Graf <tgraf@infradead.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-07 14:08:44 -07:00
Mat Martineau
fadd192e81 Bluetooth: Remove L2CAP busy queue
The ERTM receive buffer is now handled in a way that does not require
the busy queue and the associated polling code.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 15:29:06 -03:00
Mat Martineau
e328140fda Bluetooth: Use event-driven approach for handling ERTM receive buffer
This change moves most L2CAP ERTM receive buffer handling out of the
L2CAP core and in to the socket code.  It's up to the higher layer
(the socket code, in this case) to tell the core when its buffer is
full or has space available.  The recv op should always accept
incoming ERTM data or else the connection will go down.

Within the socket layer, an skb that does not fit in the socket
receive buffer will be temporarily stored.  When the socket is read
from, that skb will be placed in the receive buffer if possible.  Once
adequate buffer space becomes available, the L2CAP core is informed
and the ERTM local busy state is cleared.

Receive buffer management for non-ERTM modes is unchanged.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-07 15:28:56 -03:00
Shirley Ma
1cdebb4232 sock.h: Add a new sock zero-copy flag
Signed-off-by: Shirley Ma <xma@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-07 04:40:21 -07:00
Andre Guedes
eead27da60 Bluetooth: Add lmp_host_le_capable() macro
Since we have the extended LMP features properly implemented, we
should check the LMP_HOST_LE bit to know if the host supports LE.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-06 19:10:41 -03:00
Andre Guedes
e6100a2541 Bluetooth: Add enable_le module parameter
This patch adds a new module parameter to enable/disable host LE
support. By default host LE support is disabled.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-06 19:10:37 -03:00
Andre Guedes
f9b49306dc Bluetooth: Write LE Host Supported command
This patch adds a handler to Write LE Host Supported command complete
events. Once this commands has completed successfully, we should
read the extended LMP features and update the extfeatures field in
hci_dev.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-06 19:10:32 -03:00
Andre Guedes
971e3a4bbc Bluetooth: Add extfeatures to struct hci_dev
This new field holds the extended LMP features value. Some LE
mechanism such as discovery procedure needs to read the extended
LMP features to work properly.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-06 19:10:27 -03:00
Johannes Berg
c68f4b892c mac80211: support GTK rekey offload
This adds the necessary mac80211 APIs to support
GTK rekey offload, mirroring the functionality
from cfg80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-06 15:05:43 -04:00
Johannes Berg
e5497d766a cfg80211/nl80211: support GTK rekey offload
In certain circumstances, like WoWLAN scenarios,
devices may implement (partial) GTK rekeying on
the device to avoid waking up the host for it.

In order to successfully go through GTK rekeying,
the KEK, KCK and the replay counter are required.

Add API to let the supplicant hand the parameters
to the driver which may store it for future GTK
rekey operations.

Note that, of course, if GTK rekeying is done by
the device, the EAP frame must not be passed up
to userspace, instead a rekey event needs to be
sent to let userspace update its replay counter.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-06 15:05:42 -04:00
Johannes Berg
830af02f24 mac80211: allow driver to iterate keys
When in suspend/wowlan, devices might implement crypto
offload differently (more features), and might require
reprogramming keys for the WoWLAN (as it is the case
for Intel devices that use another uCode image). Thus
allow the driver to iterate all keys in this context.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-06 15:05:41 -04:00
Eric Dumazet
dc7f9f6e88 net: sched: constify tcf_proto and tc_action
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-06 02:52:16 -07:00
Shmulik Ravid
5b7f762674 dcbnl: Add CEE notification
This patch add an unsolicited notification of the DCBX negotiated
parameters for the CEE flavor of the DCBX protocol. The notification
message is identical to the aggregated CEE get operation and holds all
the pertinent local and peer information. The notification routine is
exported so it can be invoked by drivers supporting an embedded DCBX
stack.

Signed-off-by: Shmulik Ravid <shmulikr@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-05 23:42:17 -07:00
David S. Miller
e12fe68ce3 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-05 23:23:37 -07:00
David S. Miller
595fc71baa ipv4: Add ip_defrag() agent IP_DEFRAG_AF_PACKET.
Elide the ICMP on frag queue timeouts unconditionally for
this user.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-05 22:34:52 -07:00
David S. Miller
994635a137 Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 2011-07-05 18:22:39 -07:00
Lauro Ramos Venancio
4d12b8b129 NFC: add nfc generic netlink interface
The NFC generic netlink interface exports the NFC control operations
to the user space.

Signed-off-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-05 15:26:57 -04:00
Lauro Ramos Venancio
3e256b8f8d NFC: add nfc subsystem core
The NFC subsystem core is responsible for providing the device driver
interface. It is also responsible for providing an interface to the control
operations and data exchange.

Signed-off-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-05 15:26:57 -04:00
Johannes Berg
2b4562dfd6 mac80211: allow driver to impose WoWLAN restrictions
If the driver can't support WoWLAN in the current
state, this patch allows it to return 1 from the
suspend callback to do the normal deconfiguration
instead of using suspend/resume calls. Note that
if it does this, resume won't be called.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-05 15:26:56 -04:00
David S. Miller
957c665f37 ipv6: Don't put artificial limit on routing table size.
IPV6, unlike IPV4, doesn't have a routing cache.

Routing table entries, as well as clones made in response
to route lookup requests, all live in the same table.  And
all of these things are together collected in the destination
cache table for ipv6.

This means that routing table entries count against the garbage
collection limits, even though such entries cannot ever be reclaimed
and are added explicitly by the administrator (rather than being
created in response to lookups).

Therefore it makes no sense to count ipv6 routing table entries
against the GC limits.

Add a DST_NOCOUNT destination cache entry flag, and skip the counting
if it is set.  Use this flag bit in ipv6 when adding routing table
entries.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-01 17:30:43 -07:00
Thomas Graf
4e985adaa5 rtnl: provide link dump consistency info
This patch adds a change sequence counter to each net namespace
which is bumped whenever a netdevice is added or removed from
the list. If such a change occurred while a link dump took place,
the dump will have the NLM_F_DUMP_INTR flag set in the first
message which has been interrupted and in all subsequent messages
of the same dump.

Note that links may still be modified or renamed while a dump is
taking place but we can guarantee for userspace to receive a
complete list of links and not miss any.

Testing:
I have added 500 VLAN netdevices to make sure the dump is split
over multiple messages. Then while continuously dumping links in
one process I also continuously deleted and re-added a dummy
netdevice in another process. Multiple dumps per seconds have
had the NLM_F_DUMP_INTR flag set.

I guess we can wait for Johannes patch to hit net-next via the
wireless tree.  I just wanted to give this some testing right away.

Signed-off-by: Thomas Graf <tgraf@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-01 15:39:53 -07:00
Gustavo F. Padovan
f8c1fbdb76 Bluetooth: Clean up unused struct hci_conn items
priv and lock are never used

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-07-01 16:10:06 -03:00
David S. Miller
60c2ce2b4f Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2011-07-01 01:52:02 -07:00
Joe Perches
e1447d8d8d Bluetooth: Add bt_printk
Add a local logging function to emit bluetooth specific
messages.  Using vsprintf extension %pV saves code/text
space.

Convert the current BT_INFO and BT_ERR macros to use bt_printk.
Remove __func__ from BT_ERR macro (and the uses).
Prefix "Bluetooth: " to BT_ERR
Remove __func__ from BT_DBG as function can be prefixed when
using dynamic_debug.

With allyesconfig:

   text    data     bss     dec     hex filename
 129956    8632   36096  174684   2aa5c drivers/bluetooth/built-in.o.new2
 134402    8632   36064  179098   2bb9a drivers/bluetooth/built-in.o.old
  14778    1012    3408   19198    4afe net/bluetooth/bnep/built-in.o.new2
  15067    1012    3408   19487    4c1f net/bluetooth/bnep/built-in.o.old
 346595   19163   86080  451838   6e4fe net/bluetooth/built-in.o.new2
 353751   19163   86064  458978   700e2 net/bluetooth/built-in.o.old
  18483    1172    4264   23919    5d6f net/bluetooth/cmtp/built-in.o.new2
  18927    1172    4264   24363    5f2b net/bluetooth/cmtp/built-in.o.old
  19237    1172    5152   25561    63d9 net/bluetooth/hidp/built-in.o.new2
  19581    1172    5152   25905    6531 net/bluetooth/hidp/built-in.o.old
  59461    3884   14464   77809   12ff1 net/bluetooth/rfcomm/built-in.o.new2
  61206    3884   14464   79554   136c2 net/bluetooth/rfcomm/built-in.o.old

with x86 defconfig (and just bluetooth):

$ size net/bluetooth/built-in.o.defconfig.*
   text    data     bss     dec     hex filename
  66358     933     100   67391   1073f net/bluetooth/built-in.o.defconfig.new
  66643     933     100   67676   1085c net/bluetooth/built-in.o.defconfig.old

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-30 19:17:12 -03:00
Joe Perches
e175072f37 Bluetooth: Rename function bt_err to bt_to_errno
Make it easier to use more normal logging styles later.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-30 18:44:08 -03:00
John W. Linville
df2cbe4075 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-06-30 13:34:06 -04:00
John W. Linville
690b0cacb6 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into for-davem 2011-06-30 11:26:04 -04:00
Arik Nemtsov
39df600aa6 mac80211: propagate information about STA WME support down
Add a memeber to the ieee80211_sta structure to indicate whether the STA
supports WME.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-29 15:11:00 -04:00
John W. Linville
3be3fdb58a Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
Conflicts:
	drivers/net/wireless/iwlwifi/iwl-tx.c
2011-06-28 13:56:21 -04:00
Vitaliy Ivanov
e1f91f82b8 treewide: fix kernel-doc warnings
Fix 'make htmldocs' warnings:

Warning(/include/linux/hrtimer.h:153): No description found for
parameter 'clockid'
Warning(/include/linux/device.h:604): Excess struct/union/enum/typedef
member 'of_match' description in 'device'
Warning(/include/net/sock.h:349): Excess struct/union/enum/typedef
member 'sk_rmem_alloc' description in 'sock'

Signed-off-by: Vitaliy Ivanov <vitalivanov@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-06-28 10:48:34 +02:00
Vitaliy Ivanov
4d258b25d9 Fix some kernel-doc warnings
Fix 'make htmldocs' warnings:

  Warning(/include/linux/hrtimer.h:153): No description found for parameter 'clockid'
  Warning(/include/linux/device.h:604): Excess struct/union/enum/typedef member 'of_match' description in 'device'
  Warning(/include/net/sock.h:349): Excess struct/union/enum/typedef member 'sk_rmem_alloc' description in 'sock'

Signed-off-by: Vitaliy Ivanov <vitalivanov@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-27 16:06:19 -07:00
Arik Nemtsov
a66b98db57 mac80211: fix rx->key NULL dereference during mic failure
Sometimes when reporting a MIC failure rx->key may be unset. This
code path is hit when receiving a packet meant for a multicast
address, and decryption is performed in HW.

Fortunately, the failing key_idx is not used for anything up to
(and including) usermode, so we allow ourselves to drop it on the
way up when a key cannot be retrieved.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-27 14:45:25 -04:00
Vitaliy Ivanov
c6af9c406c net: wimax: Remove of unused 'rfkill_input' pointer
Seems like this was not cleaned during the 'rfkill: rewrite' checkin
19d337dff9.

Signed-off-by: Vitaliy Ivanov <vitalivanov@gmail.com>
Acked-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-24 17:50:44 -07:00
John W. Linville
36099365c7 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
Conflicts:
	drivers/net/wireless/rtlwifi/pci.c
	include/linux/netlink.h
2011-06-24 15:25:51 -04:00
David S. Miller
d18cd551d1 net: Fix build failures due to ip_is_fragment()
It needs to be available even when CONFIG_INET is not set.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-23 21:28:52 -07:00
Johannes Berg
670dc2833d netlink: advertise incomplete dumps
Consider the following situation:
 * a dump that would show 8 entries, four in the first
   round, and four in the second
 * between the first and second rounds, 6 entries are
   removed
 * now the second round will not show any entry, and
   even if there is a sequence/generation counter the
   application will not know

To solve this problem, add a new flag NLM_F_DUMP_INTR
to the netlink header that indicates the dump wasn't
consistent, this flag can also be set on the MSG_DONE
message that terminates the dump, and as such above
situation can be detected.

To achieve this, add a sequence counter to the netlink
callback struct. Of course, netlink code still needs
to use this new functionality. The correct way to do
that is to always set cb->seq when a dumpit callback
is invoked and call nl_dump_check_consistent() for
each new message. The core code will also call this
function for the final MSG_DONE message.

To make it usable with generic netlink, a new function
genlmsg_nlhdr() is needed to obtain the netlink header
from the genetlink user header.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-22 16:09:45 -04:00
John W. Linville
1c1236e3af Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/padovan/bluetooth-next-2.6 2011-06-22 16:06:58 -04:00
Paul Gortmaker
56f8a75c17 ip: introduce ip_is_fragment helper inline function
There are enough instances of this:

    iph->frag_off & htons(IP_MF | IP_OFFSET)

that a helper function is probably warranted.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 20:33:34 -07:00
John Fastabend
ab6baf980b dcb: fix return type on dcb_setapp()
Incorrect return type on dcb_setapp() this routine
returns negative error codes. All call sites of
dcb_setapp() assign the return value to an int already
so no need to update drivers.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 16:06:12 -07:00
John Fastabend
a364c8cf80 dcb: Add dcb_ieee_getapp_mask() for drivers to query APP settings
With multiple APP entries per selector and protocol drivers
or stacks may want to pick a specific value or stripe traffic
across many priorities. Also if an APP entry in use is
deleted the stack/driver may want to choose from the existing
APP entries.

To facilitate this and avoid having duplicate code to walk
the APP ring provide a routine dcb_ieee_getapp_mask() to
return a u8 bitmask of all priorities set for the specified
selector and protocol. This routine and bitmask is a helper
for DCB kernel users.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 16:06:12 -07:00
John Fastabend
f9ae7e4b51 dcb: Add ieee_dcb_delapp() and dcb op to delete app entry
Now that we allow multiple IEEE App entries we need a way
to remove specific entries. To do this add the ieee_dcb_delapp()
routine.

Additionaly drivers may need to remove the APP entry from
their firmware tables. Add dcb ops routine to handle this.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 16:06:11 -07:00
John Fastabend
b6db2174c5 dcb: Add ieee_dcb_setapp() to be used for IEEE 802.1Qaz APP data
This adds a setapp routine for IEEE802.1Qaz encoded APP data types.
The IEEE 802.1Qaz spec encodes the priority bits differently and
allows for multiple APP data entries of the same selector and
protocol. Trying to force these to use the same set routines was
becoming tedious. Furthermore, userspace could probably enforce
the correct semantics, but expecting drivers to do this seems
error prone in the firmware case.

For these reasons add ieee_dcb_setapp() that understands the
IEEE 802.1Qaz encoded form.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 16:06:11 -07:00
John Fastabend
314b4778ed net: dcbnl, add multicast group for DCB
Now that dcbnl is being used in many cases by more
than a single agent it is beneficial to be notified
when some entity either driver or user space has
changed the DCB attributes.

Today applications either end up polling the interface
or relying on a user space database to maintain the DCB
state and post events. Polling is a poor solution for
obvious reasons. And relying on a user space database
has its own downside. Namely it has created strange
boot dependencies requiring the database be populated
before any applications dependent on DCB attributes
starts or the application goes into a polling loop.
Populating the database requires negotiating link
setting with the peer and can take anywhere from less
than a second up to a few seconds depending on the switch
implementation.

Perhaps more importantly if another application or an
embedded agent sets a DCB link attribute the database
has no way of knowing other than polling the kernel.
This prevents applications from responding quickly to
changes in link events which at least in the FCoE case
and probably any other protocols expecting a lossless
link may result in IO errors.

By adding a multicast group for DCB we have clean way
to disseminate kernel DCB link attributes up to user
space. Avoiding the need for user space to maintain
a coherant database and disperse events that potentially
do not reflect the current link state.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21 16:06:11 -07:00
David S. Miller
9f6ec8d697 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
	drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
	drivers/net/wireless/rtlwifi/pci.c
	net/netfilter/ipvs/ip_vs_core.c
2011-06-20 22:29:08 -07:00
Linus Torvalds
6e158d2198 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (40 commits)
  pxa168_eth: fix race in transmit path.
  ipv4, ping: Remove duplicate icmp.h include
  netxen: fix race in skb->len access
  sgi-xp: fix a use after free
  hp100: fix an skb->len race
  netpoll: copy dev name of slaves to struct netpoll
  ipv4: fix multicast losses
  r8169: fix static initializers.
  inet_diag: fix inet_diag_bc_audit()
  gigaset: call module_put before restart of if_open()
  farsync: add module_put to error path in fst_open()
  net: rfs: enable RFS before first data packet is received
  fs_enet: fix freescale FCC ethernet dp buffer alignment
  netdev: bfin_mac: fix memory leak when freeing dma descriptors
  vlan: don't call ndo_vlan_rx_register on hardware that doesn't have vlan support
  caif: Bugfix - XOFF removed channel from caif-mux
  tun: teach the tun/tap driver to support netpoll
  dp83640: drop PHY status frames in the driver.
  dp83640: fix phy status frame event parsing
  phylib: Allow BCM63XX PHY to be selected only on BCM63XX.
  ...
2011-06-20 20:10:18 -07:00
Eliad Peller
b856439b1b mac80211: add cancel_hw_scan() callback
When suspending, __ieee80211_suspend() calls ieee80211_scan_cancel(),
which will only cancel sw scan. In order to cancel hw scan, the
low-level driver has to cancel it in the suspend() callback. however,
this is too late, as a new scan_work will be enqueued (while the driver
is going into suspend).

Add a new cancel_hw_scan() callback, asking the driver to cancel an
active hw scan, and call it in ieee80211_scan_cancel().

Signed-off-by: Eliad Peller <eliad@wizery.com>
Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-17 14:22:18 -04:00
Gustavo F. Padovan
e2ab43536c Bluetooth: Use bit operations on conn_state
Instead of setting bits manually we use set_bit, test_bit, etc.
Also remove L2CAP_ prefix from macros.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-16 18:57:15 -03:00
Gustavo F. Padovan
c1360a1cf3 Bluetooth: use bit operation on conf_state
Instead of making the bit operations manually, we now use set_bit,
test_bit, etc.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-16 18:57:14 -03:00
Antti Julku
7fbec224cf Bluetooth: Add blacklisting support for mgmt interface
Management interface commands for blocking and unblocking devices.

Signed-off-by: Antti Julku <antti.julku@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-16 18:57:04 -03:00
Antti Julku
b2a66aad86 Bluetooth: Move blacklisting functions to hci_core
Move blacklisting functions to hci_core.c, so that they can
be used by both management interface and hci socket interface.

Signed-off-by: Antti Julku <antti.julku@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-16 15:19:41 -03:00
Julian Anastasov
42c1edd345 netfilter: nf_nat: avoid double seq_adjust for loopback
Avoid double seq adjustment for loopback traffic
because it causes silent repetition of TCP data. One
example is passive FTP with DNAT rule and difference in the
length of IP addresses.

	This patch adds check if packet is sent and
received via loopback device. As the same conntrack is
used both for outgoing and incoming direction, we restrict
seq adjustment to happen only in POSTROUTING.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-06-16 17:29:22 +02:00
Vinicius Costa Gomes
3158c50c33 Bluetooth: Add key size checks for SMP
This patch implements a check in smp cmd pairing request and pairing
response to verify if encryption key maximum size is compatible in both
slave and master when SMP Pairing is requested. Keys are also masked to
the correct negotiated size.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 14:54:10 -03:00
Vinicius Costa Gomes
5d3de7df18 Bluetooth: Add support for SMP timeout
This patch adds support for disconnecting the link when SMP procedure
takes more than 30 seconds.

SMP begins when either the Pairing Request command is sent or the
Pairing Response is received, and it ends when the link is encrypted
(or terminated). Vol 3, Part H Section 3.4.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-14 14:54:05 -03:00
Hans Schillstrom
6c8f794993 IPVS: remove unused init and cleanup functions.
After restructuring, there is some unused or empty functions
left to be removed.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2011-06-14 09:07:32 +09:00
Vinicius Costa Gomes
88167aed0d Bluetooth: Update the security level when link is encrypted
If the pending security level is greater than the current security
level and the link is now encrypted, we should update the link
security level.

This is only useful for LE links, when the only event generated
when SMP is sucessful in the Encrypt Change event.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 16:05:35 -03:00
Vinicius Costa Gomes
a7a595f675 Bluetooth: Add support for LE Start Encryption
This adds support for starting SMP Phase 2 Encryption, when the initial
SMP negotiation is successful. This adds the LE Start Encryption and LE
Long Term Key Request commands and related events.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 15:48:25 -03:00
Anderson Briglia
7d24ddcc11 Bluetooth: Add SMP confirmation checks methods
This patch includes support for generating and sending the random value
used to produce the confirmation value.

Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 15:48:25 -03:00
Anderson Briglia
f01ead3157 Bluetooth: Add SMP confirmation structs
This patch adds initial support for verifying the confirmation value
that the remote side has sent.

Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 15:48:24 -03:00
Vinicius Costa Gomes
3a0259bb80 Bluetooth: Add support for using the crypto subsystem
This will allow using the crypto subsystem for encrypting data. As SMP
(Security Manager Protocol) is implemented almost entirely on the host
side and the crypto module already implements the needed methods
(AES-128), it makes sense to use it.

There's now a new module option to enable/disable SMP support.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 15:48:22 -03:00
Anderson Briglia
88ba43b662 Bluetooth: Add simple SMP pairing negotiation
This implementation only exchanges SMP messages between the Host and the
Remote. No keys are being generated. TK and STK generation will be
provided in further patches.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 15:48:22 -03:00
Anderson Briglia
eb492e0169 Bluetooth: Implement the first SMP commands
These simple commands will allow the SMP procedure to be started
and terminated with a not supported error. This is the first step
toward something useful.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Anderson Briglia <anderson.briglia@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 15:11:55 -03:00
Gustavo F. Padovan
1a09bcb97c Bluetooth: keep reference if any ERTM timer is enabled
ERTM use the generic L2CAP timer functions to keep a reference to the
channel. This is useful for avoiding crashes.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:33 -03:00
Gustavo F. Padovan
c9b6667537 Bluetooth: Make timer functions generic
We now plan to use l2cap_set_timer and l2cap_clear_timer in ERTM timers.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:33 -03:00
Gustavo F. Padovan
71ba0e569b Bluetooth: Add refcnt to struct l2cap_chan
struct l2cap_chan has now its own refcnt that is compatible with the
socket refcnt, i.e., we won't see sk_refcnt = 0 and chan->refcnt > 0.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:33 -03:00
Gustavo F. Padovan
89bc500e41 Bluetooth: Add state tracking to struct l2cap_chan
Now socket state is tracked by struct sock and channel state is tracked by
chan->state. At this point both says the same, but this is going to change
when we add AMP Support for example.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:33 -03:00
Gustavo F. Padovan
ba3bd0ee39 Bluetooth: add close() callback to l2cap_chan_ops
close() calls l2cap_sock_kill() on l2cap_sock.c

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:33 -03:00
Gustavo F. Padovan
2307049422 Bluetooth: add recv() callback to l2cap_chan_ops
This abstracts the call to sock_queue_recv_skb() into
l2cap_chan_ops->recv().

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:33 -03:00
Gustavo F. Padovan
80808e431e Bluetooth: Add l2cap_chan_ops abstraction
Add an abstraction layer between L2CAP core and its users (only
l2cap_sock.c now). The first function implemented is new_connection() that
replaces calls to l2cap_sock_alloc() in l2cap_core.c

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-06-13 14:55:32 -03:00
Hans Schillstrom
503cf15a5e IPVS: rename of netns init and cleanup functions.
Make it more clear what the functions does,
on request by Julian.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2011-06-13 17:10:09 +09:00
Hans Schillstrom
ed78bec4d6 IPVS remove unused var from migration to netns
Remove variable ctl_key from struct netns_ipvs,
it's a leftover from early netns work.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2011-06-13 17:04:06 +09:00
Al Viro
a685e08987 Delay struct net freeing while there's a sysfs instance refering to it
* new refcount in struct net, controlling actual freeing of the memory
	* new method in kobj_ns_type_operations (->drop_ns())
	* ->current_ns() semantics change - it's supposed to be followed by
corresponding ->drop_ns().  For struct net in case of CONFIG_NET_NS it bumps
the new refcount; net_drop_ns() decrements it and calls net_free() if the
last reference has been dropped.  Method renamed to ->grab_current_ns().
	* old net_free() callers call net_drop_ns() instead.
	* sysfs_exit_ns() is gone, along with a large part of callchain
leading to it; now that the references stored in ->ns[...] stay valid we
do not need to hunt them down and replace them with NULL.  That fixes
problems in sysfs_lookup() and sysfs_readdir(), along with getting rid
of sb->s_instances abuse.

	Note that struct net *shutdown* logics has not changed - net_cleanup()
is called exactly when it used to be called.  The only thing postponed by
having a sysfs instance refering to that struct net is actual freeing of
memory occupied by struct net.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-12 17:45:41 -04:00
Eric Dumazet
8f0ea0fe3a snmp: reduce percpu needs by 50%
SNMP mibs use two percpu arrays, one used in BH context, another in USER
context. With increasing number of cpus in machines, and fact that ipv6
uses per network device ipstats_mib, this is consuming a lot of memory
if many network devices are registered.

commit be281e554e (ipv6: reduce per device ICMP mib sizes) shrinked
percpu needs for ipv6, but we can reduce memory use a bit more.

With recent percpu infrastructure (irqsafe_cpu_inc() ...), we no longer
need this BH/USER separation since we can update counters in a single
x86 instruction, regardless of the BH/USER context.

Other arches than x86 might need to disable irq in their
irqsafe_cpu_inc() implementation : If this happens to be a problem, we
can make SNMP_ARRAY_SZ arch dependent, but a previous poll
( https://lkml.org/lkml/2011/3/17/174 ) to arch maintainers did not
raise strong opposition.

Only on 32bit arches, we need to disable BH for 64bit counters updates
done from USER context (currently used for IP MIB)

This also reduces vmlinux size :

1) x86_64 build
$ size vmlinux.before vmlinux.after
   text	   data	    bss	    dec	    hex	filename
7853650	1293772	1896448	11043870	 a8841e	vmlinux.before
7850578	1293772	1896448	11040798	 a8781e	vmlinux.after

2) i386  build
$ size vmlinux.before vmlinux.afterpatch
   text	   data	    bss	    dec	    hex	filename
6039335	 635076	3670016	10344427	 9dd7eb	vmlinux.before
6037342	 635076	3670016	10342434	 9dd022	vmlinux.afterpatch

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Andi Kleen <andi@firstfloor.org>
CC: Ingo Molnar <mingo@elte.hu>
CC: Tejun Heo <tj@kernel.org>
CC: Christoph Lameter <cl@linux-foundation.org>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org
CC: linux-arch@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-11 16:23:59 -07:00
Eliad Peller
1d34d108e0 mac80211: add ieee80211_get_operstate() function
Add ieee80211_get_operstate() function to get the operstate
of the netdevice.

This is needed for drivers that need to know when the interface
is IF_OPER_UP (e.g. wl12xx), and block notifiers can't be used
(e.g. because the interface is already IF_OPER_UP, like after
resuming from suspend)

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-06-10 14:26:50 -04:00