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32632 commits

Author SHA1 Message Date
Ying Xue f97e455abf tipc: use RTNL lock to protect tipc_net_stop routine
As the tipc network initialization(ie, tipc_net_start routine) is
under RTNL protection, its corresponding deinitialization part(ie,
tipc_net_stop routine) should be protected by RTNL too.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-22 21:17:52 -04:00
Ying Xue ca07fb07c9 tipc: adjust locking policy of protecting tipc_ptr pointer of net_device
Currently the 'tipc_ptr' pointer is protected by tipc_net_lock
write lock on write side, and RCU read lock is applied to read
side. In addition, there have two paths on write side where we
may change variables pointed by the 'tipc_ptr' pointer: one is
to configure bearer by tipc-config tool and another one is that
bearer status is changed by notification events of its attached
interface. But on the latter path, we improperly deem that
accessing 'tipc_ptr' pointer happens on read side with
rcu_read_lock() although some variables pointed by the 'tipc_ptr'
pointer are changed possibly.

Moreover, as now the both paths are guarded by RTNL lock, it's
better to adjust the locking policy of 'tipc_ptr' pointer
protection, allowing RTNL instead of tipc_net_lock write lock to
protect it on write side, which will help us purge tipc_net_lock
in the future.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-22 21:17:52 -04:00
Ying Xue ef13a262c3 tipc: replace config_mutex lock with RTNL lock
There have two paths where we can configure or change bearer status:
one is that bearer is configured from user space with tipc-config
tool; another one is that bearer is changed by notification events
from its attached interface. On the first path, one dedicated
config_mutex lock is guarded; on the latter path, RTNL lock has been
placed to serialize the process of dealing with interface events.
So, if RTNL lock is also used to protect the first path, this will
not only extremely help us simplify current locking policy, but also
config_mutex lock can be deleted as well.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-22 21:17:52 -04:00
Andrew Lutomirski 78541c1dc6 net: Fix ns_capable check in sock_diag_put_filterinfo
The caller needs capabilities on the namespace being queried, not on
their own namespace.  This is a security bug, although it likely has
only a minor impact.

Cc: stable@vger.kernel.org
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-22 12:49:39 -04:00
Bob Copeland bc3ce0b0be mac80211: mesh: always use the latest target_sn
When a path target responds to a path request, its response
always contains the most up-to-date information; accordingly,
it should use the latest target_sn, regardless of
net_traversal_jiffies().  Otherwise, only the first path
response is considered when constructing a path, as it will
have the highest target_sn of all replies during that period.

Signed-off-by: Bob Copeland <bob@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:24:50 +02:00
Bob Copeland a40a8c17b2 mac80211: fix mesh_add_rsn_ie IE finding loop
Previously, the code to copy the RSN IE from the mesh config
would increment its pointer by one in the loop instead of by
the element length, so there was the potential for mistaking
another IE's data fields as the RSN IE.

cfg80211_find_ie() exists, so just use that.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:24:49 +02:00
Bob Copeland aee6499c8c mac80211: mesh: use u16 return type for u16 getter
u16_field_get() is a simple wrapper around get_unaligned_le16(),
and it is being assigned to a u16, so there's no need to
promote to u32 in the middle.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:24:49 +02:00
Jouni Malinen 9a07bf507d mac80211: Allow HT capa override to add 40 MHz intolerant
This can be useful for testing purposes to confirm valid AP behavior on
HT 20/40 co-existence functionality.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:23:19 +02:00
Luis R. Rodriguez 96cce12ff6 cfg80211: fix processing world regdomain when non modular
This allows processing of the last regulatory request when
we determine its still pending. Without this if a regulatory
request failed to get processed by userspace we wouldn't
be able to re-process it later. An example situation that can
lead to an unprocessed last_request is enabling cfg80211 to
be built-in to the kernel, not enabling CFG80211_INTERNAL_REGDB
and the CRDA binary not being available at the time the udev
rule that kicks of CRDA triggers.

In such a situation we want to let some cfg80211 triggers
eventually kick CRDA for us again. Without this if the first
cycle attempt to kick off CRDA failed we'd be stuck without
the ability to change process any further regulatory domains.

cfg80211 will trigger re-processing of the regulatory queue
whenever schedule_work(&reg_work) is called, currently this
happens when:

  * suspend / resume
  * disconnect
  * a beacon hint gets triggered (non DFS 5 GHz AP found)
  * a regulatory request gets added to the queue

We don't have any specific opportunistic late boot triggers
to address a late mount of where CRDA resides though, adding
that should be done separately through another patch.
Without an opportunistic fix then this fix relies at least
one of the triggeres above to happen.

Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:17:56 +02:00
Arik Nemtsov c888393b74 cfg80211: avoid freeing last_request while in flight
Avoid freeing the last request while it is being processed. This can
happen in some cases if reg_work is kicked for some reason while the
currently pending request is in flight.

Cc: Sander Eikelenboom <linux@eikelenboom.it>
Tested-by: Eliad Peller <eliad@wizery.com>
Tested-by: Colleen Twitty <colleen@cozybit.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:12:55 +02:00
Bob Copeland 311ab8e1c2 mac80211: fixup radiotap tx flags for RTS/CTS
When using RTS/CTS, the CTS-to-Self bit in radiotap TX flags is
getting set instead of the RTS bit.  Set the correct one.

Reported-by: Larry Maxwell <larrymaxwell@agilemesh.com>
Signed-off-by: Bob Copeland <bob@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 17:08:30 +02:00
Chun-Yeow Yeoh 062f1d6de0 mac80211: avoid handling of SMPS for mesh
The patch "mac80211: implement SMPS for AP" has caused kernel
oops at mesh STA if the peer mesh STA operates in sleep mode
and then becomes active mode. It can be easily reproduced by
setting the following commands at peer mesh STA:

iw mesh0 station set aa:bb:cc:dd:ee:ff mesh_power_mode deep
iw mesh0 station set aa:bb:cc:dd:ee:ff mesh_power_mode active

Kernel oops will happen at mesh STA aa:bb:cc:dd:ee:ff.

Fix this by avoiding SMPS for mesh mode.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-22 16:38:42 +02:00
Weiping Pan 86fd14ad1e tcp: make tcp_cwnd_application_limited() static
Make tcp_cwnd_application_limited() static and move it from tcp_input.c to
tcp_output.c

Signed-off-by: Weiping Pan <wpan@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-20 18:18:56 -04:00
Luis R. Rodriguez 94716d2fb1 6lowpan: make lowpan_cb static
CC: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: linux-zigbee-devel@lists.sourceforge.net
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-20 18:18:55 -04:00
Luis R. Rodriguez 599018a710 6lowpan: add helper to get 6lowpan namespace
This will simplify the new reassembly backport
with no code changes being required.

CC: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: linux-zigbee-devel@lists.sourceforge.net
Cc: David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-20 18:18:55 -04:00
Neil Horman 8465a5fcd1 sctp: add support for busy polling to sctp protocol
The busy polling socket option adds support for sockets to busy wait on data
arriving on the napi queue from which they have most recently received a frame.
Currently only tcp and udp support this feature, but theres no reason sctp can't
do so as well.  Add it in so appliations can take advantage of it

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Vlad Yasevich <vyasevich@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Daniel Borkmann <dborkman@redhat.com>
CC: netdev@vger.kernel.org
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-20 18:18:55 -04:00
Herbert Xu a0265d28b3 net: Add __dev_forward_skb
This patch adds the helper __dev_forward_skb which is identical to
dev_forward_skb except that it doesn't actually inject the skb into
the stack.  This is useful where we wish to have finer control over
how the packet is injected, e.g., via netif_rx_ni or netif_receive_skb.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-20 18:18:55 -04:00
Kenjiro Nakayama 1536e2857b tcp: Add a TCP_FASTOPEN socket option to get a max backlog on its listner
This patch adds a TCP_FASTOPEN socket option to get a max backlog on its
listener to getsockopt().

Signed-off-by: Kenjiro Nakayama <nakayamakenjiro@gmail.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-20 18:18:54 -04:00
Vlad Yasevich b14878ccb7 net: sctp: cache auth_enable per endpoint
Currently, it is possible to create an SCTP socket, then switch
auth_enable via sysctl setting to 1 and crash the system on connect:

Oops[#1]:
CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.1-mipsgit-20140415 #1
task: ffffffff8056ce80 ti: ffffffff8055c000 task.ti: ffffffff8055c000
[...]
Call Trace:
[<ffffffff8043c4e8>] sctp_auth_asoc_set_default_hmac+0x68/0x80
[<ffffffff8042b300>] sctp_process_init+0x5e0/0x8a4
[<ffffffff8042188c>] sctp_sf_do_5_1B_init+0x234/0x34c
[<ffffffff804228c8>] sctp_do_sm+0xb4/0x1e8
[<ffffffff80425a08>] sctp_endpoint_bh_rcv+0x1c4/0x214
[<ffffffff8043af68>] sctp_rcv+0x588/0x630
[<ffffffff8043e8e8>] sctp6_rcv+0x10/0x24
[<ffffffff803acb50>] ip6_input+0x2c0/0x440
[<ffffffff8030fc00>] __netif_receive_skb_core+0x4a8/0x564
[<ffffffff80310650>] process_backlog+0xb4/0x18c
[<ffffffff80313cbc>] net_rx_action+0x12c/0x210
[<ffffffff80034254>] __do_softirq+0x17c/0x2ac
[<ffffffff800345e0>] irq_exit+0x54/0xb0
[<ffffffff800075a4>] ret_from_irq+0x0/0x4
[<ffffffff800090ec>] rm7k_wait_irqoff+0x24/0x48
[<ffffffff8005e388>] cpu_startup_entry+0xc0/0x148
[<ffffffff805a88b0>] start_kernel+0x37c/0x398
Code: dd0900b8  000330f8  0126302d <dcc60000> 50c0fff1  0047182a  a48306a0
03e00008  00000000
---[ end trace b530b0551467f2fd ]---
Kernel panic - not syncing: Fatal exception in interrupt

What happens while auth_enable=0 in that case is, that
ep->auth_hmacs is initialized to NULL in sctp_auth_init_hmacs()
when endpoint is being created.

After that point, if an admin switches over to auth_enable=1,
the machine can crash due to NULL pointer dereference during
reception of an INIT chunk. When we enter sctp_process_init()
via sctp_sf_do_5_1B_init() in order to respond to an INIT chunk,
the INIT verification succeeds and while we walk and process
all INIT params via sctp_process_param() we find that
net->sctp.auth_enable is set, therefore do not fall through,
but invoke sctp_auth_asoc_set_default_hmac() instead, and thus,
dereference what we have set to NULL during endpoint
initialization phase.

The fix is to make auth_enable immutable by caching its value
during endpoint initialization, so that its original value is
being carried along until destruction. The bug seems to originate
from the very first days.

Fix in joint work with Daniel Borkmann.

Reported-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Tested-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-18 18:32:00 -04:00
David S. Miller 5a292f7bc6 Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
John W. Linville says:

====================
pull request: wireless 2014-04-17

Please pull this batch of fixes intended for the 3.15 stream...

For the mac80211 bits, Johannes says:

"We have a fix from Chun-Yeow to not look at management frame bitrates
that are typically really low, two fixes from Felix for AP_VLAN
interfaces, a fix from Ido to disable SMPS settings when a monitor
interface is enabled, a radar detection fix from Michał and a fix from
myself for a very old remain-on-channel bug."

For the iwlwifi bits, Emmanuel says:

"I have new device IDs and a new firmware API. These are the trivial
ones. The less trivial ones are Johannes's fix that delays the
enablement of an interrupt coalescing hardware until after association
- this fixes a few connection problems seen in the field. Eyal has a
bunch of rate control fixes. I decided to add these for 3.15 because
they fix some disconnection and packet loss scenarios which were
reported by the field. I also have a fix for a memory leak that
happens only with a very new NIC."

Along with those...

Amitkumar Karwar fixes a couple of problems relating to driver/firmware
interactions in mwifiex.

Christian Engelmayer avoids a couple of potential memory leaks in
the new rsi driver.

Eliad Peller provides a wl18xx mailbox alignment fix for problems
when using new firmware.

Frederic Danis adds a couple of missing debugging strings to the
cw1200 driver.

Geert Uytterhoeven adds a variable initialization inside of the
rsi driver.

Luciano Coelho patches the wlcore code to ignore dummy packet events
in PLT mode in order to work around a firmware bug.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-18 18:29:44 -04:00
dingtianhong dc8eaaa006 vlan: Fix lockdep warning when vlan dev handle notification
When I open the LOCKDEP config and run these steps:

modprobe 8021q
vconfig add eth2 20
vconfig add eth2.20 30
ifconfig eth2 xx.xx.xx.xx

then the Call Trace happened:

[32524.386288] =============================================
[32524.386293] [ INFO: possible recursive locking detected ]
[32524.386298] 3.14.0-rc2-0.7-default+ #35 Tainted: G           O
[32524.386302] ---------------------------------------------
[32524.386306] ifconfig/3103 is trying to acquire lock:
[32524.386310]  (&vlan_netdev_addr_lock_key/1){+.....}, at: [<ffffffff814275f4>] dev_mc_sync+0x64/0xb0
[32524.386326]
[32524.386326] but task is already holding lock:
[32524.386330]  (&vlan_netdev_addr_lock_key/1){+.....}, at: [<ffffffff8141af83>] dev_set_rx_mode+0x23/0x40
[32524.386341]
[32524.386341] other info that might help us debug this:
[32524.386345]  Possible unsafe locking scenario:
[32524.386345]
[32524.386350]        CPU0
[32524.386352]        ----
[32524.386354]   lock(&vlan_netdev_addr_lock_key/1);
[32524.386359]   lock(&vlan_netdev_addr_lock_key/1);
[32524.386364]
[32524.386364]  *** DEADLOCK ***
[32524.386364]
[32524.386368]  May be due to missing lock nesting notation
[32524.386368]
[32524.386373] 2 locks held by ifconfig/3103:
[32524.386376]  #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff81431d42>] rtnl_lock+0x12/0x20
[32524.386387]  #1:  (&vlan_netdev_addr_lock_key/1){+.....}, at: [<ffffffff8141af83>] dev_set_rx_mode+0x23/0x40
[32524.386398]
[32524.386398] stack backtrace:
[32524.386403] CPU: 1 PID: 3103 Comm: ifconfig Tainted: G           O 3.14.0-rc2-0.7-default+ #35
[32524.386409] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[32524.386414]  ffffffff81ffae40 ffff8800d9625ae8 ffffffff814f68a2 ffff8800d9625bc8
[32524.386421]  ffffffff810a35fb ffff8800d8a8d9d0 00000000d9625b28 ffff8800d8a8e5d0
[32524.386428]  000003cc00000000 0000000000000002 ffff8800d8a8e5f8 0000000000000000
[32524.386435] Call Trace:
[32524.386441]  [<ffffffff814f68a2>] dump_stack+0x6a/0x78
[32524.386448]  [<ffffffff810a35fb>] __lock_acquire+0x7ab/0x1940
[32524.386454]  [<ffffffff810a323a>] ? __lock_acquire+0x3ea/0x1940
[32524.386459]  [<ffffffff810a4874>] lock_acquire+0xe4/0x110
[32524.386464]  [<ffffffff814275f4>] ? dev_mc_sync+0x64/0xb0
[32524.386471]  [<ffffffff814fc07a>] _raw_spin_lock_nested+0x2a/0x40
[32524.386476]  [<ffffffff814275f4>] ? dev_mc_sync+0x64/0xb0
[32524.386481]  [<ffffffff814275f4>] dev_mc_sync+0x64/0xb0
[32524.386489]  [<ffffffffa0500cab>] vlan_dev_set_rx_mode+0x2b/0x50 [8021q]
[32524.386495]  [<ffffffff8141addf>] __dev_set_rx_mode+0x5f/0xb0
[32524.386500]  [<ffffffff8141af8b>] dev_set_rx_mode+0x2b/0x40
[32524.386506]  [<ffffffff8141b3cf>] __dev_open+0xef/0x150
[32524.386511]  [<ffffffff8141b177>] __dev_change_flags+0xa7/0x190
[32524.386516]  [<ffffffff8141b292>] dev_change_flags+0x32/0x80
[32524.386524]  [<ffffffff8149ca56>] devinet_ioctl+0x7d6/0x830
[32524.386532]  [<ffffffff81437b0b>] ? dev_ioctl+0x34b/0x660
[32524.386540]  [<ffffffff814a05b0>] inet_ioctl+0x80/0xa0
[32524.386550]  [<ffffffff8140199d>] sock_do_ioctl+0x2d/0x60
[32524.386558]  [<ffffffff81401a52>] sock_ioctl+0x82/0x2a0
[32524.386568]  [<ffffffff811a7123>] do_vfs_ioctl+0x93/0x590
[32524.386578]  [<ffffffff811b2705>] ? rcu_read_lock_held+0x45/0x50
[32524.386586]  [<ffffffff811b39e5>] ? __fget_light+0x105/0x110
[32524.386594]  [<ffffffff811a76b1>] SyS_ioctl+0x91/0xb0
[32524.386604]  [<ffffffff815057e2>] system_call_fastpath+0x16/0x1b

========================================================================

The reason is that all of the addr_lock_key for vlan dev have the same class,
so if we change the status for vlan dev, the vlan dev and its real dev will
hold the same class of addr_lock_key together, so the warning happened.

we should distinguish the lock depth for vlan dev and its real dev.

v1->v2: Convert the vlan_netdev_addr_lock_key to an array of eight elements, which
	could support to add 8 vlan id on a same vlan dev, I think it is enough for current
	scene, because a netdev's name is limited to IFNAMSIZ which could not hold 8 vlan id,
	and the vlan dev would not meet the same class key with its real dev.

	The new function vlan_dev_get_lockdep_subkey() will return the subkey and make the vlan
	dev could get a suitable class key.

v2->v3: According David's suggestion, I use the subclass to distinguish the lock key for vlan dev
	and its real dev, but it make no sense, because the difference for subclass in the
	lock_class_key doesn't mean that the difference class for lock_key, so I use lock_depth
	to distinguish the different depth for every vlan dev, the same depth of the vlan dev
	could have the same lock_class_key, I import the MAX_LOCK_DEPTH from the include/linux/sched.h,
	I think it is enough here, the lockdep should never exceed that value.

v3->v4: Add a huge array of locking keys will waste static kernel memory and is not a appropriate method,
	we could use _nested() variants to fix the problem, calculate the depth for every vlan dev,
	and use the depth as the subclass for addr_lock_key.

Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-18 17:48:30 -04:00
John W. Linville 4a0c3d9fd1 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2014-04-17 10:34:22 -04:00
Nicolas Dichtel 74462f0d4a ip6_tunnel: use the right netns in ioctl handler
Because the netdevice may be in another netns than the i/o netns, we should
use the i/o netns instead of dev_net(dev).

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:16:02 -04:00
Nicolas Dichtel 9aad77c3b5 sit: use the right netns in ioctl handler
Because the netdevice may be in another netns than the i/o netns, we should
use the i/o netns instead of dev_net(dev).

Note that netdev_priv(dev) cannot bu NULL, hence we can remove these useless
checks.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:16:02 -04:00
Nicolas Dichtel 8c923ce219 ip_tunnel: use the right netns in ioctl handler
Because the netdevice may be in another netns than the i/o netns, we should
use the i/o netns instead of dev_net(dev).

The variable 'tunnel' was used only to get 'itn', hence to simplify code I
remove it and use 't' instead.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:16:02 -04:00
Jan Glauber b7c0ddf5f2 net: use SYSCALL_DEFINEx for sys_recv
Make sys_recv a first class citizen by using the SYSCALL_DEFINEx
macro. Besides being cleaner this will also generate meta data
for the system call so tracing tools like ftrace or LTTng can
resolve this system call.

Signed-off-by: Jan Glauber <jan.glauber@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:15:05 -04:00
Cong Wang 0d5edc6873 ipv4, route: pass 0 instead of LOOPBACK_IFINDEX to fib_validate_source()
In my special case, when a packet is redirected from veth0 to lo,
its skb->dev->ifindex would be LOOPBACK_IFINDEX. Meanwhile we
pass the hard-coded LOOPBACK_IFINDEX to fib_validate_source()
in ip_route_input_slow(). This would cause the following check
in fib_validate_source() fail:

            (dev->ifindex != oif || !IN_DEV_TX_REDIRECTS(idev))

when rp_filter is disabeld on loopback. As suggested by Julian,
the caller should pass 0 here so that we will not end up by
calling __fib_validate_source().

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:05:12 -04:00
Cong Wang 6a662719c9 ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
As suggested by Julian:

	Simply, flowi4_iif must not contain 0, it does not
	look logical to ignore all ip rules with specified iif.

because in fib_rule_match() we do:

        if (rule->iifindex && (rule->iifindex != fl->flowi_iif))
                goto out;

flowi4_iif should be LOOPBACK_IFINDEX by default.

We need to move LOOPBACK_IFINDEX to include/net/flow.h:

1) It is mostly used by flowi_iif

2) Fix the following compile error if we use it in flow.h
by the patches latter:

In file included from include/linux/netfilter.h:277:0,
                 from include/net/netns/netfilter.h:5,
                 from include/net/net_namespace.h:21,
                 from include/linux/netdevice.h:43,
                 from include/linux/icmpv6.h:12,
                 from include/linux/ipv6.h:61,
                 from include/net/ipv6.h:16,
                 from include/linux/sunrpc/clnt.h:27,
                 from include/linux/nfs_fs.h:30,
                 from init/do_mounts.c:32:
include/net/flow.h: In function ‘flowi4_init_output’:
include/net/flow.h:84:32: error: ‘LOOPBACK_IFINDEX’ undeclared (first use in this function)

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:05:11 -04:00
Nicolas Dichtel 54d63f787b ip6_gre: don't allow to remove the fb_tunnel_dev
It's possible to remove the FB tunnel with the command 'ip link del ip6gre0' but
this is unsafe, the module always supposes that this device exists. For example,
ip6gre_tunnel_lookup() may use it unconditionally.

Let's add a rtnl handler for dellink, which will never remove the FB tunnel (we
let ip6gre_destroy_tunnels() do the job).

Introduced by commit c12b395a46 ("gre: Support GRE over IPv6").

CC: Dmitry Kozlov <xeb@mail.ru>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-15 14:56:19 -04:00
Eric Dumazet aad88724c9 ipv4: add a sock pointer to dst->output() path.
In the dst->output() path for ipv4, the code assumes the skb it has to
transmit is attached to an inet socket, specifically via
ip_mc_output() : The sk_mc_loop() test triggers a WARN_ON() when the
provider of the packet is an AF_PACKET socket.

The dst->output() method gets an additional 'struct sock *sk'
parameter. This needs a cascade of changes so that this parameter can
be propagated from vxlan to final consumer.

Fixes: 8f646c922d ("vxlan: keep original skb ownership")
Reported-by: lucien xin <lucien.xin@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-15 13:47:15 -04:00
Eric Dumazet b0270e9101 ipv4: add a sock pointer to ip_queue_xmit()
ip_queue_xmit() assumes the skb it has to transmit is attached to an
inet socket. Commit 31c70d5956 ("l2tp: keep original skb ownership")
changed l2tp to not change skb ownership and thus broke this assumption.

One fix is to add a new 'struct sock *sk' parameter to ip_queue_xmit(),
so that we do not assume skb->sk points to the socket used by l2tp
tunnel.

Fixes: 31c70d5956 ("l2tp: keep original skb ownership")
Reported-by: Zhan Jianyu <nasa4836@gmail.com>
Tested-by: Zhan Jianyu <nasa4836@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-15 12:58:34 -04:00
David S. Miller 00cbc3dcd1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains three Netfilter fixes for your net tree,
they are:

* Fix missing generation sequence initialization which results in a splat
  if lockdep is enabled, it was introduced in the recent works to improve
  nf_conntrack scalability, from Andrey Vagin.

* Don't flush the GRE keymap list in nf_conntrack when the pptp helper is
  disabled otherwise this crashes due to a double release, from Andrey
  Vagin.

* Fix nf_tables cmp fast in big endian, from Patrick McHardy.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-14 19:00:10 -04:00
Vlad Yasevich 1e785f48d2 net: Start with correct mac_len in skb_network_protocol
Sometimes, when the packet arrives at skb_mac_gso_segment()
its skb->mac_len already accounts for some of the mac lenght
headers in the packet.  This seems to happen when forwarding
through and OpenSSL tunnel.

When we start looking for any vlan headers in skb_network_protocol()
we seem to ignore any of the already known mac headers and start
with an ETH_HLEN.  This results in an incorrect offset, dropped
TSO frames and general slowness of the connection.

We can start counting from the known skb->mac_len
and return at least that much if all mac level headers
are known and accounted for.

Fixes: 53d6471cef (net: Account for all vlan headers in skb_mac_gso_segment)
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Daniel Borkman <dborkman@redhat.com>
Tested-by: Martin Filip <nexus+kernel@smoula.net>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-14 18:58:58 -04:00
Daniel Borkmann 362d52040c Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer"
This reverts commit ef2820a735 ("net: sctp: Fix a_rwnd/rwnd management
to reflect real state of the receiver's buffer") as it introduced a
serious performance regression on SCTP over IPv4 and IPv6, though a not
as dramatic on the latter. Measurements are on 10Gbit/s with ixgbe NICs.

Current state:

[root@Lab200slot2 ~]# iperf3 --sctp -4 -c 192.168.241.3 -V -l 1452 -t 60
iperf version 3.0.1 (10 January 2014)
Linux Lab200slot2 3.14.0 #1 SMP Thu Apr 3 23:18:29 EDT 2014 x86_64
Time: Fri, 11 Apr 2014 17:56:21 GMT
Connecting to host 192.168.241.3, port 5201
      Cookie: Lab200slot2.1397238981.812898.548918
[  4] local 192.168.241.2 port 38616 connected to 192.168.241.3 port 5201
Starting Test: protocol: SCTP, 1 streams, 1452 byte blocks, omitting 0 seconds, 60 second test
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.09   sec  20.8 MBytes   161 Mbits/sec
[  4]   1.09-2.13   sec  10.8 MBytes  86.8 Mbits/sec
[  4]   2.13-3.15   sec  3.57 MBytes  29.5 Mbits/sec
[  4]   3.15-4.16   sec  4.33 MBytes  35.7 Mbits/sec
[  4]   4.16-6.21   sec  10.4 MBytes  42.7 Mbits/sec
[  4]   6.21-6.21   sec  0.00 Bytes    0.00 bits/sec
[  4]   6.21-7.35   sec  34.6 MBytes   253 Mbits/sec
[  4]   7.35-11.45  sec  22.0 MBytes  45.0 Mbits/sec
[  4]  11.45-11.45  sec  0.00 Bytes    0.00 bits/sec
[  4]  11.45-11.45  sec  0.00 Bytes    0.00 bits/sec
[  4]  11.45-11.45  sec  0.00 Bytes    0.00 bits/sec
[  4]  11.45-12.51  sec  16.0 MBytes   126 Mbits/sec
[  4]  12.51-13.59  sec  20.3 MBytes   158 Mbits/sec
[  4]  13.59-14.65  sec  13.4 MBytes   107 Mbits/sec
[  4]  14.65-16.79  sec  33.3 MBytes   130 Mbits/sec
[  4]  16.79-16.79  sec  0.00 Bytes    0.00 bits/sec
[  4]  16.79-17.82  sec  5.94 MBytes  48.7 Mbits/sec
(etc)

[root@Lab200slot2 ~]#  iperf3 --sctp -6 -c 2001:db8:0:f101::1 -V -l 1400 -t 60
iperf version 3.0.1 (10 January 2014)
Linux Lab200slot2 3.14.0 #1 SMP Thu Apr 3 23:18:29 EDT 2014 x86_64
Time: Fri, 11 Apr 2014 19:08:41 GMT
Connecting to host 2001:db8:0:f101::1, port 5201
      Cookie: Lab200slot2.1397243321.714295.2b3f7c
[  4] local 2001:db8:0:f101::2 port 55804 connected to 2001:db8:0:f101::1 port 5201
Starting Test: protocol: SCTP, 1 streams, 1400 byte blocks, omitting 0 seconds, 60 second test
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec   169 MBytes  1.42 Gbits/sec
[  4]   1.00-2.00   sec   201 MBytes  1.69 Gbits/sec
[  4]   2.00-3.00   sec   188 MBytes  1.58 Gbits/sec
[  4]   3.00-4.00   sec   174 MBytes  1.46 Gbits/sec
[  4]   4.00-5.00   sec   165 MBytes  1.39 Gbits/sec
[  4]   5.00-6.00   sec   199 MBytes  1.67 Gbits/sec
[  4]   6.00-7.00   sec   163 MBytes  1.36 Gbits/sec
[  4]   7.00-8.00   sec   174 MBytes  1.46 Gbits/sec
[  4]   8.00-9.00   sec   193 MBytes  1.62 Gbits/sec
[  4]   9.00-10.00  sec   196 MBytes  1.65 Gbits/sec
[  4]  10.00-11.00  sec   157 MBytes  1.31 Gbits/sec
[  4]  11.00-12.00  sec   175 MBytes  1.47 Gbits/sec
[  4]  12.00-13.00  sec   192 MBytes  1.61 Gbits/sec
[  4]  13.00-14.00  sec   199 MBytes  1.67 Gbits/sec
(etc)

After patch:

[root@Lab200slot2 ~]#  iperf3 --sctp -4 -c 192.168.240.3 -V -l 1452 -t 60
iperf version 3.0.1 (10 January 2014)
Linux Lab200slot2 3.14.0+ #1 SMP Mon Apr 14 12:06:40 EDT 2014 x86_64
Time: Mon, 14 Apr 2014 16:40:48 GMT
Connecting to host 192.168.240.3, port 5201
      Cookie: Lab200slot2.1397493648.413274.65e131
[  4] local 192.168.240.2 port 50548 connected to 192.168.240.3 port 5201
Starting Test: protocol: SCTP, 1 streams, 1452 byte blocks, omitting 0 seconds, 60 second test
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec   240 MBytes  2.02 Gbits/sec
[  4]   1.00-2.00   sec   239 MBytes  2.01 Gbits/sec
[  4]   2.00-3.00   sec   240 MBytes  2.01 Gbits/sec
[  4]   3.00-4.00   sec   239 MBytes  2.00 Gbits/sec
[  4]   4.00-5.00   sec   245 MBytes  2.05 Gbits/sec
[  4]   5.00-6.00   sec   240 MBytes  2.01 Gbits/sec
[  4]   6.00-7.00   sec   240 MBytes  2.02 Gbits/sec
[  4]   7.00-8.00   sec   239 MBytes  2.01 Gbits/sec

With the reverted patch applied, the SCTP/IPv4 performance is back
to normal on latest upstream for IPv4 and IPv6 and has same throughput
as 3.4.2 test kernel, steady and interval reports are smooth again.

Fixes: ef2820a735 ("net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer")
Reported-by: Peter Butler <pbutler@sonusnet.com>
Reported-by: Dongsheng Song <dongsheng.song@gmail.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Peter Butler <pbutler@sonusnet.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nsn.com>
Cc: Alexander Sverdlin <alexander.sverdlin@nsn.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-14 16:26:48 -04:00
Daniel Borkmann 8c482cdc35 net: filter: seccomp: fix wrong decoding of BPF_S_ANC_SECCOMP_LD_W
While reviewing seccomp code, we found that BPF_S_ANC_SECCOMP_LD_W has
been wrongly decoded by commit a8fc927780 ("sk-filter: Add ability to
get socket filter program (v2)") into the opcode BPF_LD|BPF_B|BPF_ABS
although it should have been decoded as BPF_LD|BPF_W|BPF_ABS.

In practice, this should not have much side-effect though, as such
conversion is/was being done through prctl(2) PR_SET_SECCOMP. Reverse
operation PR_GET_SECCOMP will only return the current seccomp mode, but
not the filter itself. Since the transition to the new BPF infrastructure,
it's also not used anymore, so we can simply remove this as it's
unreachable.

Fixes: a8fc927780 ("sk-filter: Add ability to get socket filter program (v2)")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-14 16:26:47 -04:00
John W. Linville 08e22e193a Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 2014-04-14 13:47:01 -04:00
Eric Dumazet 30f78d8ebf ipv6: Limit mtu to 65575 bytes
Francois reported that setting big mtu on loopback device could prevent
tcp sessions making progress.

We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets.

We must limit the IPv6 MTU to (65535 + 40) bytes in theory.

Tested:

ifconfig lo mtu 70000
netperf -H ::1

Before patch : Throughput :   0.05 Mbits

After patch : Throughput : 35484 Mbits

Reported-by: Francois WELLENREITER <f.wellenreiter@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-14 12:39:59 -04:00
Patrick McHardy b855d416dc netfilter: nf_tables: fix nft_cmp_fast failure on big endian for size < 4
nft_cmp_fast is used for equality comparisions of size <= 4. For
comparisions of size < 4 byte a mask is calculated that is applied to
both the data from userspace (during initialization) and the register
value (during runtime). Both values are stored using (in effect) memcpy
to a memory area that is then interpreted as u32 by nft_cmp_fast.

This works fine on little endian since smaller types have the same base
address, however on big endian this is not true and the smaller types
are interpreted as a big number with trailing zero bytes.

The mask therefore must not include the lower bytes, but the higher bytes
on big endian. Add a helper function that does a cpu_to_le32 to switch
the bytes on big endian. Since we're dealing with a mask of just consequitive
bits, this works out fine.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-14 10:38:02 +02:00
Andrey Vagin ee214d54bf netfilter: nf_conntrack: initialize net.ct.generation
[  251.920788] INFO: trying to register non-static key.
[  251.921386] the code is fine but needs lockdep annotation.
[  251.921386] turning off the locking correctness validator.
[  251.921386] CPU: 2 PID: 15715 Comm: socket_listen Not tainted 3.14.0+ #294
[  251.921386] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  251.921386]  0000000000000000 000000009d18c210 ffff880075f039b8 ffffffff816b7ecd
[  251.921386]  ffffffff822c3b10 ffff880075f039c8 ffffffff816b36f4 ffff880075f03aa0
[  251.921386]  ffffffff810c65ff ffffffff810c4a85 00000000fffffe01 ffffffffa0075172
[  251.921386] Call Trace:
[  251.921386]  [<ffffffff816b7ecd>] dump_stack+0x45/0x56
[  251.921386]  [<ffffffff816b36f4>] register_lock_class.part.24+0x38/0x3c
[  251.921386]  [<ffffffff810c65ff>] __lock_acquire+0x168f/0x1b40
[  251.921386]  [<ffffffff810c4a85>] ? trace_hardirqs_on_caller+0x105/0x1d0
[  251.921386]  [<ffffffffa0075172>] ? nf_nat_setup_info+0x252/0x3a0 [nf_nat]
[  251.921386]  [<ffffffff816c1215>] ? _raw_spin_unlock_bh+0x35/0x40
[  251.921386]  [<ffffffffa0075172>] ? nf_nat_setup_info+0x252/0x3a0 [nf_nat]
[  251.921386]  [<ffffffff810c7272>] lock_acquire+0xa2/0x120
[  251.921386]  [<ffffffffa008ab90>] ? ipv4_confirm+0x90/0xf0 [nf_conntrack_ipv4]
[  251.921386]  [<ffffffffa0055989>] __nf_conntrack_confirm+0x129/0x410 [nf_conntrack]
[  251.921386]  [<ffffffffa008ab90>] ? ipv4_confirm+0x90/0xf0 [nf_conntrack_ipv4]
[  251.921386]  [<ffffffffa008ab90>] ipv4_confirm+0x90/0xf0 [nf_conntrack_ipv4]
[  251.921386]  [<ffffffff815e7b00>] ? ip_fragment+0x9f0/0x9f0
[  251.921386]  [<ffffffff815d8c5a>] nf_iterate+0xaa/0xc0
[  251.921386]  [<ffffffff815e7b00>] ? ip_fragment+0x9f0/0x9f0
[  251.921386]  [<ffffffff815d8d14>] nf_hook_slow+0xa4/0x190
[  251.921386]  [<ffffffff815e7b00>] ? ip_fragment+0x9f0/0x9f0
[  251.921386]  [<ffffffff815e98f2>] ip_output+0x92/0x100
[  251.921386]  [<ffffffff815e8df9>] ip_local_out+0x29/0x90
[  251.921386]  [<ffffffff815e9240>] ip_queue_xmit+0x170/0x4c0
[  251.921386]  [<ffffffff815e90d5>] ? ip_queue_xmit+0x5/0x4c0
[  251.921386]  [<ffffffff81601208>] tcp_transmit_skb+0x498/0x960
[  251.921386]  [<ffffffff81602d82>] tcp_connect+0x812/0x960
[  251.921386]  [<ffffffff810e3dc5>] ? ktime_get_real+0x25/0x70
[  251.921386]  [<ffffffff8159ea2a>] ? secure_tcp_sequence_number+0x6a/0xc0
[  251.921386]  [<ffffffff81606f57>] tcp_v4_connect+0x317/0x470
[  251.921386]  [<ffffffff8161f645>] __inet_stream_connect+0xb5/0x330
[  251.921386]  [<ffffffff8158dfc3>] ? lock_sock_nested+0x33/0xa0
[  251.921386]  [<ffffffff810c4b5d>] ? trace_hardirqs_on+0xd/0x10
[  251.921386]  [<ffffffff81078885>] ? __local_bh_enable_ip+0x75/0xe0
[  251.921386]  [<ffffffff8161f8f8>] inet_stream_connect+0x38/0x50
[  251.921386]  [<ffffffff8158b157>] SYSC_connect+0xe7/0x120
[  251.921386]  [<ffffffff810e3789>] ? current_kernel_time+0x69/0xd0
[  251.921386]  [<ffffffff810c4a85>] ? trace_hardirqs_on_caller+0x105/0x1d0
[  251.921386]  [<ffffffff810c4b5d>] ? trace_hardirqs_on+0xd/0x10
[  251.921386]  [<ffffffff8158c36e>] SyS_connect+0xe/0x10
[  251.921386]  [<ffffffff816caf69>] system_call_fastpath+0x16/0x1b
[  312.014104] INFO: rcu_sched detected stalls on CPUs/tasks: {} (detected by 0, t=60003 jiffies, g=42359, c=42358, q=333)
[  312.015097] INFO: Stall ended before state dump start

Fixes: 93bb0ceb75 ("netfilter: conntrack: remove central spinlock nf_conntrack_lock")
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-14 10:35:28 +02:00
Mathias Krause 05ab8f2647 filter: prevent nla extensions to peek beyond the end of the message
The BPF_S_ANC_NLATTR and BPF_S_ANC_NLATTR_NEST extensions fail to check
for a minimal message length before testing the supplied offset to be
within the bounds of the message. This allows the subtraction of the nla
header to underflow and therefore -- as the data type is unsigned --
allowing far to big offset and length values for the search of the
netlink attribute.

The remainder calculation for the BPF_S_ANC_NLATTR_NEST extension is
also wrong. It has the minuend and subtrahend mixed up, therefore
calculates a huge length value, allowing to overrun the end of the
message while looking for the netlink attribute.

The following three BPF snippets will trigger the bugs when attached to
a UNIX datagram socket and parsing a message with length 1, 2 or 3.

 ,-[ PoC for missing size check in BPF_S_ANC_NLATTR ]--
 | ld	#0x87654321
 | ldx	#42
 | ld	#nla
 | ret	a
 `---

 ,-[ PoC for the same bug in BPF_S_ANC_NLATTR_NEST ]--
 | ld	#0x87654321
 | ldx	#42
 | ld	#nlan
 | ret	a
 `---

 ,-[ PoC for wrong remainder calculation in BPF_S_ANC_NLATTR_NEST ]--
 | ; (needs a fake netlink header at offset 0)
 | ld	#0
 | ldx	#42
 | ld	#nlan
 | ret	a
 `---

Fix the first issue by ensuring the message length fulfills the minimal
size constrains of a nla header. Fix the second bug by getting the math
for the remainder calculation right.

Fixes: 4738c1db15 ("[SKFILTER]: Add SKF_ADF_NLATTR instruction")
Fixes: d214c7537b ("filter: add SKF_AD_NLATTR_NEST to look for nested..")
Cc: Patrick McHardy <kaber@trash.net>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-13 23:31:55 -04:00
Julian Anastasov 91146153da ipv4: return valid RTA_IIF on ip route get
Extend commit 13378cad02
("ipv4: Change rt->rt_iif encoding.") from 3.6 to return valid
RTA_IIF on 'ip route get ... iif DEVICE' instead of rt_iif 0
which is displayed as 'iif *'.

inet_iif is not appropriate to use because skb_iif is not set.
Use the skb->dev->ifindex instead.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-13 23:23:41 -04:00
Wang, Xiaoming b04c461902 net: ipv4: current group_info should be put after using.
Plug a group_info refcount leak in ping_init.
group_info is only needed during initialization and
the code failed to release the reference on exit.
While here move grabbing the reference to a place
where it is actually needed.

Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com>
Signed-off-by: Zhang Dongxing <dongxing.zhang@intel.com>
Signed-off-by: xiaoming wang <xiaoming.wang@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-13 22:52:58 -04:00
Linus Torvalds 454fd351f2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull yet more networking updates from David Miller:

 1) Various fixes to the new Redpine Signals wireless driver, from
    Fariya Fatima.

 2) L2TP PPP connect code takes PMTU from the wrong socket, fix from
    Dmitry Petukhov.

 3) UFO and TSO packets differ in whether they include the protocol
    header in gso_size, account for that in skb_gso_transport_seglen().
   From Florian Westphal.

 4) If VLAN untagging fails, we double free the SKB in the bridging
    output path.  From Toshiaki Makita.

 5) Several call sites of sk->sk_data_ready() were referencing an SKB
    just added to the socket receive queue in order to calculate the
    second argument via skb->len.  This is dangerous because the moment
    the skb is added to the receive queue it can be consumed in another
    context and freed up.

    It turns out also that none of the sk->sk_data_ready()
    implementations even care about this second argument.

    So just kill it off and thus fix all these use-after-free bugs as a
    side effect.

 6) Fix inverted test in tcp_v6_send_response(), from Lorenzo Colitti.

 7) pktgen needs to do locking properly for LLTX devices, from Daniel
    Borkmann.

 8) xen-netfront driver initializes TX array entries in RX loop :-) From
    Vincenzo Maffione.

 9) After refactoring, some tunnel drivers allow a tunnel to be
    configured on top itself.  Fix from Nicolas Dichtel.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
  vti: don't allow to add the same tunnel twice
  gre: don't allow to add the same tunnel twice
  drivers: net: xen-netfront: fix array initialization bug
  pktgen: be friendly to LLTX devices
  r8152: check RTL8152_UNPLUG
  net: sun4i-emac: add promiscuous support
  net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  net: ipv6: Fix oif in TCP SYN+ACK route lookup.
  drivers: net: cpsw: enable interrupts after napi enable and clearing previous interrupts
  drivers: net: cpsw: discard all packets received when interface is down
  net: Fix use after free by removing length arg from sk_data_ready callbacks.
  Drivers: net: hyperv: Address UDP checksum issues
  Drivers: net: hyperv: Negotiate suitable ndis version for offload support
  Drivers: net: hyperv: Allocate memory for all possible per-pecket information
  bridge: Fix double free and memory leak around br_allowed_ingress
  bonding: Remove debug_fs files when module init fails
  i40evf: program RSS LUT correctly
  i40evf: remove open-coded skb_cow_head
  ixgb: remove open-coded skb_cow_head
  igbvf: remove open-coded skb_cow_head
  ...
2014-04-12 17:31:22 -07:00
Nicolas Dichtel 8d89dcdf80 vti: don't allow to add the same tunnel twice
Before the patch, it was possible to add two times the same tunnel:
ip l a vti1 type vti remote 10.16.0.121 local 10.16.0.249 key 41
ip l a vti2 type vti remote 10.16.0.121 local 10.16.0.249 key 41

It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
argument dev->type, which was set only later (when calling ndo_init handler
in register_netdevice()). Let's set this type in the setup handler, which is
called before newlink handler.

Introduced by commit b9959fd3b0 ("vti: switch to new ip tunnel code").

CC: Cong Wang <amwang@redhat.com>
CC: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-12 17:03:11 -04:00
Nicolas Dichtel 5a4552752d gre: don't allow to add the same tunnel twice
Before the patch, it was possible to add two times the same tunnel:
ip l a gre1 type gre remote 10.16.0.121 local 10.16.0.249
ip l a gre2 type gre remote 10.16.0.121 local 10.16.0.249

It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
argument dev->type, which was set only later (when calling ndo_init handler
in register_netdevice()). Let's set this type in the setup handler, which is
called before newlink handler.

Introduced by commit c544193214 ("GRE: Refactor GRE tunneling code.").

CC: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-12 17:03:11 -04:00
Daniel Borkmann 0f2eea4b7e pktgen: be friendly to LLTX devices
Similarly to commit 43279500de ("packet: respect devices with
LLTX flag in direct xmit"), we can basically apply the very same
to pktgen. This will help testing against LLTX devices such as
dummy driver (or others), which only have a single netdevice txq
and would otherwise require locking their txq from pktgen side
while e.g. in dummy case, we would not need any locking. Fix this
by making use of HARD_TX_{UN,}LOCK API, so that NETIF_F_LLTX will
be respected.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-12 01:59:38 -04:00
Linus Torvalds 582076ab16 A bunch of updates and cleanup within the transport layer,
particularly with a focus on RDMA.
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Merge tag 'for-linus-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

Pull 9p changes from Eric Van Hensbergen:
 "A bunch of updates and cleanup within the transport layer,
  particularly with a focus on RDMA"

* tag 'for-linus-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9pnet_rdma: check token type before int conversion
  9pnet: trans_fd : allocate struct p9_trans_fd and struct p9_conn together.
  9pnet: p9_client->conn field is unused. Remove it.
  9P: Get rid of REQ_STATUS_FLSH
  9pnet_rdma: add cancelled()
  9pnet_rdma: update request status during send
  9P: Add cancelled() to the transport functions.
  net: Mark function as static in 9p/client.c
  9P: Add memory barriers to protect request fields over cb/rpc threads handoff
2014-04-11 14:14:57 -07:00
Lorenzo Colitti a36dbdb28e net: ipv6: Fix oif in TCP SYN+ACK route lookup.
net-next commit 9c76a11, ipv6: tcp_ipv6 policy route issue, had
a boolean logic error that caused incorrect behaviour for TCP
SYN+ACK when oif-based rules are in use. Specifically:

1. If a SYN comes in from a global address, and sk_bound_dev_if
   is not set, the routing lookup has oif set to the interface
   the SYN came in on. Instead, it should have oif unset,
   because for global addresses, the incoming interface doesn't
   necessarily have any bearing on the interface the SYN+ACK is
   sent out on.
2. If a SYN comes in from a link-local address, and
   sk_bound_dev_if is set, the routing lookup has oif set to the
   interface the SYN came in on. Instead, it should have oif set
   to sk_bound_dev_if, because that's what the application
   requested.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11 16:43:47 -04:00
David S. Miller 676d23690f net: Fix use after free by removing length arg from sk_data_ready callbacks.
Several spots in the kernel perform a sequence like:

	skb_queue_tail(&sk->s_receive_queue, skb);
	sk->sk_data_ready(sk, skb->len);

But at the moment we place the SKB onto the socket receive queue it
can be consumed and freed up.  So this skb->len access is potentially
to freed up memory.

Furthermore, the skb->len can be modified by the consumer so it is
possible that the value isn't accurate.

And finally, no actual implementation of this callback actually uses
the length argument.  And since nobody actually cared about it's
value, lots of call sites pass arbitrary values in such as '0' and
even '1'.

So just remove the length argument from the callback, that way there
is no confusion whatsoever and all of these use-after-free cases get
fixed as a side effect.

Based upon a patch by Eric Dumazet and his suggestion to audit this
issue tree-wide.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11 16:15:36 -04:00
Toshiaki Makita eb7076182d bridge: Fix double free and memory leak around br_allowed_ingress
br_allowed_ingress() has two problems.

1. If br_allowed_ingress() is called by br_handle_frame_finish() and
vlan_untag() in br_allowed_ingress() fails, skb will be freed by both
vlan_untag() and br_handle_frame_finish().

2. If br_allowed_ingress() is called by br_dev_xmit() and
br_allowed_ingress() fails, the skb will not be freed.

Fix these two problems by freeing the skb in br_allowed_ingress()
if it fails.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-11 15:12:47 -04:00
Mikel Astiz b16c660488 Bluetooth: Request MITM Protection when initiator
The GAP Specification gives the flexibility to decide whether MITM
Protection is requested or not (Bluetooth Core Specification v4.0
Volume 3, part C, section 6.5.3) when replying to an
HCI_EV_IO_CAPA_REQUEST event.

The recommendation is *not* to set this flag "unless the security
policy of an available local service requires MITM Protection"
(regardless of the bonding type). However, the kernel doesn't
necessarily have this information and therefore the safest choice is
to always use MITM Protection, also for General Bonding.

This patch changes the behavior for the General Bonding initiator
role, always requesting MITM Protection even if no high security level
is used. Depending on the remote capabilities, the protection might
not be actually used, and we will accept this locally unless of course
a high security level was originally required.

Note that this was already done for Dedicated Bonding. No-Bonding is
left unmodified because MITM Protection is normally not desired in
these cases.

Signed-off-by: Mikel Astiz <mikel.astiz@bmw-carit.de>
Signed-off-by: Timo Mueller <timo.mueller@bmw-carit.de>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-04-11 10:33:08 -07:00
Timo Mueller 7e74170af1 Bluetooth: Use MITM Protection when IO caps allow it
When responding to a remotely-initiated pairing procedure, a MITM
protected SSP associaton model can be used for pairing if both local
and remote IO capabilities are set to something other than
NoInputNoOutput, regardless of the bonding type (Dedicated or
General).

This was already done for Dedicated Bonding but this patch proposes to
use the same policy for General Bonding as well.

The GAP Specification gives the flexibility to decide whether MITM
Protection is used ot not (Bluetooth Core Specification v4.0 Volume 3,
part C, section 6.5.3).

Note however that the recommendation is *not* to set this flag "unless
the security policy of an available local service requires MITM
Protection" (for both Dedicated and General Bonding). However, as we are
already requiring MITM for Dedicated Bonding, we will follow this
behaviour also for General Bonding.

Signed-off-by: Timo Mueller <timo.mueller@bmw-carit.de>
Signed-off-by: Mikel Astiz <mikel.astiz@bmw-carit.de>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-04-11 10:33:08 -07:00
Mikel Astiz 6fd6b915bd Bluetooth: Refactor code for outgoing dedicated bonding
Do not always set the MITM protection requirement by default in the
field conn->auth_type, since this will be added later in
hci_io_capa_request_evt(), as part of the requirements specified in
HCI_OP_IO_CAPABILITY_REPLY.

This avoids a hackish exception for the auto-reject case, but doesn't
change the behavior of the code at all.

Signed-off-by: Mikel Astiz <mikel.astiz@bmw-carit.de>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-04-11 10:33:08 -07:00
Mikel Astiz b7f94c8808 Bluetooth: Refactor hci_get_auth_req()
Refactor the code without changing its behavior by handling the
no-bonding cases first followed by General Bonding.

Signed-off-by: Mikel Astiz <mikel.astiz@bmw-carit.de>
Signed-off-by: Timo Mueller <timo.mueller@bmw-carit.de>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2014-04-11 10:33:08 -07:00
Janusz Dziedzic 4f267c1198 cfg80211: reg: set DFS CAC time in case of custom regd
Set DFS CAC time also in case of using custom
and strict regulatory from drivers. In other case
we could have unset DFS CAC time directly after
driver loaded and before issue regulatory set from
user mode.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-11 10:00:10 +02:00
Felix Fietkau 764152ff66 mac80211: exclude AP_VLAN interfaces from tx power calculation
Their power value is initialized to zero. This patch fixes an issue
where the configured power drops to the minimum value when AP_VLAN
interfaces are created/removed.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-11 09:37:41 +02:00
Felix Fietkau 990baec022 mac80211: suppress BSS info change notifications for AP_VLAN
Fixes warnings on tx power changes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-11 09:37:01 +02:00
Florian Westphal 6d39d589bb net: core: don't account for udp header size when computing seglen
In case of tcp, gso_size contains the tcpmss.

For UFO (udp fragmentation offloading) skbs, gso_size is the fragment
payload size, i.e. we must not account for udp header size.

Otherwise, when using virtio drivers, a to-be-forwarded UFO GSO packet
will be needlessly fragmented in the forward path, because we think its
individual segments are too large for the outgoing link.

Fixes: fe6cc55f3a ("net: ip, ipv6: handle gso skbs in forwarding path")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: Tobias Brunner <tobias@strongswan.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-10 21:41:25 -04:00
Johannes Berg c14a74007f cfg80211: ignore invalid BSSIDs when looking for BSSes
When looking for a BSS matching given parameters, ignore invalid
BSSIDs. This avoids, for example, trying to join an IBSS that has
a multicast BSSID, which isn't supported by all drivers nor is it
a valid configuration of the IBSS so better create a new one with
a correctly chosen random BSSID.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-10 10:09:18 +02:00
Johannes Berg 74f8274103 cfg80211: reject invalid IBSS BSSIDs in wext compat code
Don't allow using a multicast address as the BSSID, that
isn't a valid configuration.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-10 10:09:16 +02:00
Zhao, Gang 96998e3a2f cfg80211: remove unused wiphy argument from cfg80211_wext_freq()
cfg80211_wext_freq() is declared in wext-compat.h, but its
parameter struct wiphy's declaration is not included there.
As the parameter isn't used, just remove it.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>
[remove parameter instead of changing to netdev]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-10 10:06:19 +02:00
Dmitry Petukhov f34c4a35d8 l2tp: take PMTU from tunnel UDP socket
When l2tp driver tries to get PMTU for the tunnel destination, it uses
the pointer to struct sock that represents PPPoX socket, while it
should use the pointer that represents UDP socket of the tunnel.

Signed-off-by: Dmitry Petukhov <dmgenp@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-09 15:24:38 -04:00
Daniel Borkmann 1e1cdf8ac7 net: sctp: test if association is dead in sctp_wake_up_waiters
In function sctp_wake_up_waiters(), we need to involve a test
if the association is declared dead. If so, we don't have any
reference to a possible sibling association anymore and need
to invoke sctp_write_space() instead, and normally walk the
socket's associations and notify them of new wmem space. The
reason for special casing is that otherwise, we could run
into the following issue when a sctp_primitive_SEND() call
from sctp_sendmsg() fails, and tries to flush an association's
outq, i.e. in the following way:

sctp_association_free()
`-> list_del(&asoc->asocs)         <-- poisons list pointer
    asoc->base.dead = true
    sctp_outq_free(&asoc->outqueue)
    `-> __sctp_outq_teardown()
     `-> sctp_chunk_free()
      `-> consume_skb()
       `-> sctp_wfree()
        `-> sctp_wake_up_waiters() <-- dereferences poisoned pointers
                                       if asoc->ep->sndbuf_policy=0

Therefore, only walk the list in an 'optimized' way if we find
that the current association is still active. We could also use
list_del_init() in addition when we call sctp_association_free(),
but as Vlad suggests, we want to trap such bugs and thus leave
it poisoned as is.

Why is it safe to resolve the issue by testing for asoc->base.dead?
Parallel calls to sctp_sendmsg() are protected under socket lock,
that is lock_sock()/release_sock(). Only within that path under
lock held, we're setting skb/chunk owner via sctp_set_owner_w().
Eventually, chunks are freed directly by an association still
under that lock. So when traversing association list on destruction
time from sctp_wake_up_waiters() via sctp_wfree(), a different
CPU can't be running sctp_wfree() while another one calls
sctp_association_free() as both happens under the same lock.
Therefore, this can also not race with setting/testing against
asoc->base.dead as we are guaranteed for this to happen in order,
under lock. Further, Vlad says: the times we check asoc->base.dead
is when we've cached an association pointer for later processing.
In between cache and processing, the association may have been
freed and is simply still around due to reference counts. We check
asoc->base.dead under a lock, so it should always be safe to check
and not race against sctp_association_free(). Stress-testing seems
fine now, too.

Fixes: cd253f9f357d ("net: sctp: wake up all assocs if sndbuf policy is per socket")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-09 12:37:49 -04:00
Zhao, Gang aa51142fc5 mac80211: fix some missing includes
Some header files in mac80211 don't include all the
header files they require, fix that.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 14:49:43 +02:00
Pawel Kulakowski a2e7495d63 mac80211: Allow disabling LDPC
This allows user-space (wpa_supplicant) to disable LDPC coding.

Signed-off-by: Pawel Kulakowski <pawel.kulakowski@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:56:00 +02:00
Michal Kazior 65d26f29ec cfg80211: fix radar_detect combination checking
All bits from radar_detect must match combination
radar bitmask. Otherwise it is theoretically
possible to lead into an invalid combination
provided a driver reports strange combinations.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:58 +02:00
Luciano Coelho 5d52ee8110 mac80211: allow reservation of a running chanctx
With single-channel drivers, we need to be able to change a running
chanctx if we want to use chanctx reservation.  Not all drivers may be
able to do this, so add a flag that indicates support for it.

Changing a running chanctx can also be used as an optimization in
multi-channel drivers when the context needs to be reserved for future
usage.

Introduce IEEE80211_CHANCTX_RESERVED chanctx mode to mark a channel as
reserved so nobody else can use it (since we know it's going to
change).  In the future, we may allow several vifs to use the same
reservation as long as they plan to use the chanctx on the same
future channel.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:56 +02:00
Luciano Coelho 11335a550b mac80211: implement chanctx reservation
In order to support channel switch with multiple vifs and multiple
contexts, we implement a concept of channel context reservation.  This
allows us to reserve a channel context to be used later.

The reservation functionality is not tied directly to channel switch
and may be used in other situations (eg. reserving a channel context
during IBSS join).

We first check if an existing compatible context exists and if it
does, we reserve it.  If there is no compatible context we create a
new one and reserve it.

Additionally, split ieee80211_vif_copy_chanctx_to_vlans() so we can
call it while already holding the chanctx mutex.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:54 +02:00
Luciano Coelho 77eeba974f mac80211: refactor ieee80211_assign/unassign_vif_chanctx into one
Combine the functions into one, so that we can switch from one context
to the other without having to unassign and assign separately.  This
is needed by the channel reservation functionality because otherwise
we have a small period of time when the chanctx is set to NULL, which
can cause problems if someone else is trying to dereference it.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:52 +02:00
Luciano Coelho 33ffd952c2 mac80211: split ieee80211_vif_change_channel in two
ieee80211_vif_change_channel() locks chanctx_mtx.  When implementing
channel reservation for CS, we will need to call the function to
change channel when the lock is already held, so split the part that
requires the lock out and leave the locking in the original function.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:50 +02:00
Michal Kazior 4e141dad26 mac80211: protect AP VLAN list with local->mtx
It was impossible to change chanctx of master AP
for AP VLANs because the copy function requires
RTNL which can't be simply taken in mac80211 code
due to possible deadlocks.

This is required for future chanctx reservation
that re-bind vifs to new chanctx. This requires
safe AP VLAN iteration without RTNL.

Now VLANs can be iterated while holding either
RTNL or local->mtx because the list is modified
while holding both of these locks.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:49 +02:00
Luciano Coelho b6a550156b cfg80211/mac80211: move more combination checks to mac80211
Get rid of the cfg80211_can_add_interface() and
cfg80211_can_change_interface() functions by moving that functionality
to mac80211.  With this patch all interface combination checks are now
out of cfg80211 (except for the channel switch case which will be
addressed in a future commit).

Additionally, modify the ieee80211_check_combinations() function so
that an undefined chandef can be passed, in order to use it before a
channel is defined.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:47 +02:00
Luciano Coelho 71965c1d04 cfg80211/mac80211: move combination check to mac80211 for ibss
Now that mac80211 can check the interface combinations itself, move
the combinations check from cfg80211 to mac80211 when joining an IBSS.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:45 +02:00
Luciano Coelho 73de86a389 cfg80211/mac80211: move interface counting for combination check to mac80211
Move the counting part of the interface combination check from
cfg80211 to mac80211.

This is needed to simplify locking when the driver has to perform a
combination check by itself (eg. with channel-switch).

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:43 +02:00
Luciano Coelho 2beb6dab2d cfg80211/mac80211: refactor cfg80211_chandef_dfs_required()
Some interface types don't require DFS (such as STATION, P2P_CLIENT
etc).  In order to centralize these decisions, make
cfg80211_chandef_dfs_required() take the iftype into consideration.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:41 +02:00
Luciano Coelho cb2d956dd3 cfg80211: refactor cfg80211_can_use_iftype_chan()
Separate the code that counts the interface types and channels from
the code that check the interface combinations.  The new function that
checks for combinations is exported so it can be called by the
drivers.

This is done in preparation for moving the interface combinations
checks out of cfg80211.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:39 +02:00
Ilan Peer c8866e55a9 cfg80211: Enable GO operation on indoor channels
Allow GO operation on a channel marked with IEEE80211_CHAN_INDOOR_ONLY
iff there is a user hint indicating that the platform is operating in
an indoor environment, i.e., the platform is a printer or media center
device.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:37 +02:00
Ilan Peer 52616f2b44 cfg80211: Add an option to hint indoor operation
Add the option to hint the wireless core that it is operating in an indoor
environment.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:35 +02:00
Ilan Peer 174e0cd28a cfg80211: Enable GO operation on additional channels
Allow GO operation on a channel marked with IEEE80211_CHAN_GO_CONCURRENT
iff there is an active station interface that is associated to
an AP operating on the same channel in the 2 GHz band or the same UNII band
(in the 5 GHz band). This relaxation is not allowed if the channel is
marked with IEEE80211_CHAN_RADAR.

Note that this is a permissive approach to the FCC definitions,
that require a clear assessment that the device operating the AP is
an authorized master, i.e., with radar detection and DFS capabilities.

It is assumed that such restrictions are enforced by user space.
Furthermore, it is assumed, that if the conditions that allowed for
the operation of the GO on such a channel change, i.e., the station
interface disconnected from the AP, it is the responsibility of user
space to evacuate the GO from the channel.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:34 +02:00
Ilan Peer 94fc661f68 cfg80211: Add Kconfig option for cellular BS hints
Move the regulatory cellular base station hints support under
a specific configuration option and make the option depend
on CFG80211_CERTIFICATION_ONUS.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:33 +02:00
David Spinadel 570dbde137 cfg80211: Add indoor only and GO concurrent channel attributes
The FCC are clarifying some soft configuration requirements,
which among other include the following:

1. Indoor operation, where a device can use channels requiring indoor
   operation, subject to that it can guarantee indoor operation,
   i.e., the device is connected to AC Power or the device is under
   the control of a local master that is acting as an AP and is
   connected to AC Power.
2. Concurrent GO operation, where devices may instantiate a P2P GO
   while they are under the guidance of an authorized master. For example,
   on a channel on which a BSS is connected to an authorized master, i.e.,
   with DFS and radar detection capability in the UNII band.

See https://apps.fcc.gov/eas/comments/GetPublishedDocument.html?id=327&tn=528122

Add support for advertising Indoor-only and GO-Concurrent channel
properties.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:32 +02:00
Zhao, Gang babd3a2721 cfg80211: slightly clean up of cfg80211_sme_connect()
Wdev->ssid_len has already been set in cfg80211_connect() and is equal
to connect->ssid_len. Use wdev->ssid_len instead of connect->ssid_len
so it will be consistent with previous ssid assignment statement.

If bss is found in cfg80211_get_conn_bss(), wdev->conn->state is set
to CFG80211_CONN_AUTHENTICATE_NEXT in there. So it's not needed to set
it manually to CFG80211_CONN_AUTHENTICATE_NEXT if bss is found in that
function.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:31 +02:00
Monam Agarwal 0c2bef4621 mac80211: use RCU_INIT_POINTER
rcu_assign_pointer() ensures that the initialization of a structure is
carried out before storing a pointer to that structure. However, in the
case that NULL is assigned there's no structure to initialize so using
RCU_INIT_POINTER instead is safe and more efficient.

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
[squash eight tiny patches, rewrite commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:30 +02:00
Monam Agarwal 34dd886c19 cfg80211: regulatory: use RCU_INIT_POINTER
rcu_assign_pointer() ensures that the initialization of a structure is
carried out before storing a pointer to that structure. However, in the
case that NULL is assigned there's no structure to initialize so using
RCU_INIT_POINTER instead is safe and more efficient.

Signed-off-by: Monam Agarwal <monamagarwal123@gmail.com>
[rewrite commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:30 +02:00
Emmanuel Grumbach 77be2c54c5 mac80211: add vif to flush call
This will allow the low level driver to make decision based
on the vif such as queues etc...
Since the vif might be NULL, we can't add it to the tracing
functions.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[fix staging rtl8821ae driver]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:29 +02:00
Johannes Berg 78f22b6a3a cfg80211: allow userspace to take ownership of interfaces
When dynamically creating interfaces from userspace, e.g. for P2P usage,
such interfaces are usually owned by the process that created them, i.e.
wpa_supplicant. Should wpa_supplicant crash, such interfaces will often
cease operating properly and cause problems on restarting the process.

To avoid this problem, introduce an ownership concept for interfaces. If
an interface is owned by a netlink socket, then it will be destroyed if
the netlink socket is closed for any reason, including if the process it
belongs to crashed. This gives us a race-free way to get rid of any such
interfaces.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:28 +02:00
Jan-Simon Möller 6e1ee5d2e9 mac80211: remove VLAIS usage from mac80211
Replaced the use of a Variable Length Array In Struct (VLAIS) with a
C99 compliant equivalent. This is the original VLAIS struct.

struct {
	struct aead_request     req;
	u8                      priv[crypto_aead_reqsize(tfm)];
} aead_req;

This patch instead allocates the appropriate amount of memory using a
char array.

The new code can be compiled with both gcc and clang.

Signed-off-by: Jan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: Behan Webster <behanw@converseincode.com>
[small style cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:27 +02:00
Chun-Yeow Yeoh 00a9a6d1e2 mac80211: update last_tx_rate only for data frame
Rate controller in firmware may also return the Tx Rate
used for management frame that is usually sent as lowest
Tx Rate (1Mbps in 2.4GHz). So update the last_tx_rate only
if it is data frame.

This patch is tested with ath9k_htc.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:50:45 +02:00
Michal Kazior 9b4816f543 mac80211: fix radar_enabled propagation
If chandef had non-HT width it was possible for
radar_enabled update to not be propagated properly
through drv_config(). This happened because
ieee80211_hw_conf_chan() would never see different
local->hw.conf.chandef and local->_oper_chandef.

This wasn't a problem with HT chandefs because
_oper_chandef width is reset to non-HT in
ieee80211_free_chanctx() making
ieee80211_hw_conf_chan() to kick in.

This problem led (at least) ath10k to not start
CAC if prior CAC was cancelled and both CACs were
requested for identical non-HT chandefs.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:48:36 +02:00
Ido Yariv 7b8a9cdd1f mac80211: Disable SMPS for the monitor interface
All antennas should be operational when monitoring to maximize
reception.

Signed-off-by: Ido Yariv <idox.yariv@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:47:58 +02:00
Johannes Berg 115b943a6e mac80211: fix software remain-on-channel implementation
Jouni reported that when doing off-channel transmissions mixed
with on-channel transmissions, the on-channel ones ended up on
the off-channel in some cases.

The reason for that is that during the refactoring of the off-
channel code, I lost the part that stopped all activity and as
a consequence the on-channel frames (including data frames)
were no longer queued but would be transmitted on the temporary
channel.

Fix this by simply restoring the lost activity stop call.

Cc: stable@vger.kernel.org
Fixes: 2eb278e083 ("mac80211: unify SW/offload remain-on-channel")
Reported-by: Jouni Malinen <j@w1.fi>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:47:47 +02:00
Linus Torvalds 75ff24fa52 Merge branch 'for-3.15' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
 "Highlights:
   - server-side nfs/rdma fixes from Jeff Layton and Tom Tucker
   - xdr fixes (a larger xdr rewrite has been posted but I decided it
     would be better to queue it up for 3.16).
   - miscellaneous fixes and cleanup from all over (thanks especially to
     Kinglong Mee)"

* 'for-3.15' of git://linux-nfs.org/~bfields/linux: (36 commits)
  nfsd4: don't create unnecessary mask acl
  nfsd: revert v2 half of "nfsd: don't return high mode bits"
  nfsd4: fix memory leak in nfsd4_encode_fattr()
  nfsd: check passed socket's net matches NFSd superblock's one
  SUNRPC: Clear xpt_bc_xprt if xs_setup_bc_tcp failed
  NFSD/SUNRPC: Check rpc_xprt out of xs_setup_bc_tcp
  SUNRPC: New helper for creating client with rpc_xprt
  NFSD: Free backchannel xprt in bc_destroy
  NFSD: Clear wcc data between compound ops
  nfsd: Don't return NFS4ERR_STALE_STATEID for NFSv4.1+
  nfsd4: fix nfs4err_resource in 4.1 case
  nfsd4: fix setclientid encode size
  nfsd4: remove redundant check from nfsd4_check_resp_size
  nfsd4: use more generous NFS4_ACL_MAX
  nfsd4: minor nfsd4_replay_cache_entry cleanup
  nfsd4: nfsd4_replay_cache_entry should be static
  nfsd4: update comments with obsolete function name
  rpc: Allow xdr_buf_subsegment to operate in-place
  NFSD: Using free_conn free connection
  SUNRPC: fix memory leak of peer addresses in XPRT
  ...
2014-04-08 18:28:14 -07:00
Linus Torvalds ce7613db2d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull more networking updates from David Miller:

 1) If a VXLAN interface is created with no groups, we can crash on
    reception of packets.  Fix from Mike Rapoport.

 2) Missing includes in CPTS driver, from Alexei Starovoitov.

 3) Fix string validations in isdnloop driver, from YOSHIFUJI Hideaki
    and Dan Carpenter.

 4) Missing irq.h include in bnxw2x, enic, and qlcnic drivers.  From
    Josh Boyer.

 5) AF_PACKET transmit doesn't statistically count TX drops, from Daniel
    Borkmann.

 6) Byte-Queue-Limit enabled drivers aren't handled properly in
    AF_PACKET transmit path, also from Daniel Borkmann.

    Same problem exists in pktgen, and Daniel fixed it there too.

 7) Fix resource leaks in driver probe error paths of new sxgbe driver,
    from Francois Romieu.

 8) Truesize of SKBs can gradually get more and more corrupted in NAPI
    packet recycling path, fix from Eric Dumazet.

 9) Fix uniprocessor netfilter build, from Florian Westphal.  In the
    longer term we should perhaps try to find a way for ARRAY_SIZE() to
    work even with zero sized array elements.

10) Fix crash in netfilter conntrack extensions due to mis-estimation of
    required extension space.  From Andrey Vagin.

11) Since we commit table rule updates before trying to copy the
    counters back to userspace (it's the last action we perform), we
    really can't signal the user copy with an error as we are beyond the
    point from which we can unwind everything.  This causes all kinds of
    use after free crashes and other mysterious behavior.

    From Thomas Graf.

12) Restore previous behvaior of div/mod by zero in BPF filter
    processing.  From Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits)
  net: sctp: wake up all assocs if sndbuf policy is per socket
  isdnloop: several buffer overflows
  netdev: remove potentially harmful checks
  pktgen: fix xmit test for BQL enabled devices
  net/at91_ether: avoid NULL pointer dereference
  tipc: Let tipc_release() return 0
  at86rf230: fix MAX_CSMA_RETRIES parameter
  mac802154: fix duplicate #include headers
  sxgbe: fix duplicate #include headers
  net: filter: be more defensive on div/mod by X==0
  netfilter: Can't fail and free after table replacement
  xen-netback: Trivial format string fix
  net: bcmgenet: Remove unnecessary version.h inclusion
  net: smc911x: Remove unused local variable
  bonding: Inactive slaves should keep inactive flag's value
  netfilter: nf_tables: fix wrong format in request_module()
  netfilter: nf_tables: set names cannot be larger than 15 bytes
  netfilter: nf_conntrack: reserve two bytes for nf_ct_ext->len
  netfilter: Add {ipt,ip6t}_osf aliases for xt_osf
  netfilter: x_tables: allow to use cgroup match for LOCAL_IN nf hooks
  ...
2014-04-08 12:41:23 -07:00
Linus Torvalds d586c86d50 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull second set of s390 patches from Martin Schwidefsky:
 "The second part of Heikos uaccess rework, the page table walker for
  uaccess is now a thing of the past (yay!)

  The code change to fix the theoretical TLB flush problem allows us to
  add a TLB flush optimization for zEC12, this machine has new
  instructions that allow to do CPU local TLB flushes for single pages
  and for all pages of a specific address space.

  Plus the usual bug fixing and some more cleanup"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/uaccess: rework uaccess code - fix locking issues
  s390/mm,tlb: optimize TLB flushing for zEC12
  s390/mm,tlb: safeguard against speculative TLB creation
  s390/irq: Use defines for external interruption codes
  s390/irq: Add defines for external interruption codes
  s390/sclp: add timeout for queued requests
  kvm/s390: also set guest pages back to stable on kexec/kdump
  lcs: Add missing destroy_timer_on_stack()
  s390/tape: Add missing destroy_timer_on_stack()
  s390/tape: Use del_timer_sync()
  s390/3270: fix crash with multiple reset device requests
  s390/bitops,atomic: add missing memory barriers
  s390/zcrypt: add length check for aligned data to avoid overflow in msg-type 6
2014-04-08 12:02:28 -07:00
Daniel Borkmann 52c35befb6 net: sctp: wake up all assocs if sndbuf policy is per socket
SCTP charges chunks for wmem accounting via skb->truesize in
sctp_set_owner_w(), and sctp_wfree() respectively as the
reverse operation. If a sender runs out of wmem, it needs to
wait via sctp_wait_for_sndbuf(), and gets woken up by a call
to __sctp_write_space() mostly via sctp_wfree().

__sctp_write_space() is being called per association. Although
we assign sk->sk_write_space() to sctp_write_space(), which
is then being done per socket, it is only used if send space
is increased per socket option (SO_SNDBUF), as SOCK_USE_WRITE_QUEUE
is set and therefore not invoked in sock_wfree().

Commit 4c3a5bdae2 ("sctp: Don't charge for data in sndbuf
again when transmitting packet") fixed an issue where in case
sctp_packet_transmit() manages to queue up more than sndbuf
bytes, sctp_wait_for_sndbuf() will never be woken up again
unless it is interrupted by a signal. However, a still
remaining issue is that if net.sctp.sndbuf_policy=0, that is
accounting per socket, and one-to-many sockets are in use,
the reclaimed write space from sctp_wfree() is 'unfairly'
handed back on the server to the association that is the lucky
one to be woken up again via __sctp_write_space(), while
the remaining associations are never be woken up again
(unless by a signal).

The effect disappears with net.sctp.sndbuf_policy=1, that
is wmem accounting per association, as it guarantees a fair
share of wmem among associations.

Therefore, if we have reclaimed memory in case of per socket
accounting, wake all related associations to a socket in a
fair manner, that is, traverse the socket association list
starting from the current neighbour of the association and
issue a __sctp_write_space() to everyone until we end up
waking ourselves. This guarantees that no association is
preferred over another and even if more associations are
taken into the one-to-many session, all receivers will get
messages from the server and are not stalled forever on
high load. This setting still leaves the advantage of per
socket accounting in touch as an association can still use
up global limits if unused by others.

Fixes: 4eb701dfc6 ("[SCTP] Fix SCTP sendbuffer accouting.")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-08 13:06:07 -04:00
Andrey Vagin 8142b227ef netfilter: nf_conntrack: flush net_gre->keymap_list only from gre helper
nf_ct_gre_keymap_flush() removes a nf_ct_gre_keymap object from
net_gre->keymap_list and frees the object. But it doesn't clean
a reference on this object from ct_pptp_info->keymap[dir].
Then nf_ct_gre_keymap_destroy() may release the same object again.

So nf_ct_gre_keymap_flush() can be called only when we are sure that
when nf_ct_gre_keymap_destroy will not be called.

nf_ct_gre_keymap is created by nf_ct_gre_keymap_add() and the right way
to destroy it is to call nf_ct_gre_keymap_destroy().

This patch marks nf_ct_gre_keymap_flush() as static, so this patch can
break compilation of third party modules, which use
nf_ct_gre_keymap_flush. I'm not sure this is the right way to deprecate
this function.

[  226.540793] general protection fault: 0000 [#1] SMP
[  226.541750] Modules linked in: nf_nat_pptp nf_nat_proto_gre
nf_conntrack_pptp nf_conntrack_proto_gre ip_gre ip_tunnel gre
ppp_deflate bsd_comp ppp_async crc_ccitt ppp_generic slhc xt_nat
iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_conntrack veth tun bridge stp llc ppdev microcode joydev pcspkr
serio_raw virtio_console virtio_balloon floppy parport_pc parport
pvpanic i2c_piix4 virtio_net drm_kms_helper ttm ata_generic virtio_pci
virtio_ring virtio drm i2c_core pata_acpi [last unloaded: ip_tunnel]
[  226.541776] CPU: 0 PID: 49 Comm: kworker/u4:2 Not tainted 3.14.0-rc8+ #101
[  226.541776] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  226.541776] Workqueue: netns cleanup_net
[  226.541776] task: ffff8800371e0000 ti: ffff88003730c000 task.ti: ffff88003730c000
[  226.541776] RIP: 0010:[<ffffffff81389ba9>]  [<ffffffff81389ba9>] __list_del_entry+0x29/0xd0
[  226.541776] RSP: 0018:ffff88003730dbd0  EFLAGS: 00010a83
[  226.541776] RAX: 6b6b6b6b6b6b6b6b RBX: ffff8800374e6c40 RCX: dead000000200200
[  226.541776] RDX: 6b6b6b6b6b6b6b6b RSI: ffff8800371e07d0 RDI: ffff8800374e6c40
[  226.541776] RBP: ffff88003730dbd0 R08: 0000000000000000 R09: 0000000000000000
[  226.541776] R10: 0000000000000001 R11: ffff88003730d92e R12: 0000000000000002
[  226.541776] R13: ffff88007a4c42d0 R14: ffff88007aef0000 R15: ffff880036cf0018
[  226.541776] FS:  0000000000000000(0000) GS:ffff88007fc00000(0000) knlGS:0000000000000000
[  226.541776] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  226.541776] CR2: 00007f07f643f7d0 CR3: 0000000036fd2000 CR4: 00000000000006f0
[  226.541776] Stack:
[  226.541776]  ffff88003730dbe8 ffffffff81389c5d ffff8800374ffbe4 ffff88003730dc28
[  226.541776]  ffffffffa0162a43 ffffffffa01627c5 ffff88007a4c42d0 ffff88007aef0000
[  226.541776]  ffffffffa01651c0 ffff88007a4c45e0 ffff88007aef0000 ffff88003730dc40
[  226.541776] Call Trace:
[  226.541776]  [<ffffffff81389c5d>] list_del+0xd/0x30
[  226.541776]  [<ffffffffa0162a43>] nf_ct_gre_keymap_destroy+0x283/0x2d0 [nf_conntrack_proto_gre]
[  226.541776]  [<ffffffffa01627c5>] ? nf_ct_gre_keymap_destroy+0x5/0x2d0 [nf_conntrack_proto_gre]
[  226.541776]  [<ffffffffa0162ab7>] gre_destroy+0x27/0x70 [nf_conntrack_proto_gre]
[  226.541776]  [<ffffffffa0117de3>] destroy_conntrack+0x83/0x200 [nf_conntrack]
[  226.541776]  [<ffffffffa0117d87>] ? destroy_conntrack+0x27/0x200 [nf_conntrack]
[  226.541776]  [<ffffffffa0117d60>] ? nf_conntrack_hash_check_insert+0x2e0/0x2e0 [nf_conntrack]
[  226.541776]  [<ffffffff81630142>] nf_conntrack_destroy+0x72/0x180
[  226.541776]  [<ffffffff816300d5>] ? nf_conntrack_destroy+0x5/0x180
[  226.541776]  [<ffffffffa011ef80>] ? kill_l3proto+0x20/0x20 [nf_conntrack]
[  226.541776]  [<ffffffffa011847e>] nf_ct_iterate_cleanup+0x14e/0x170 [nf_conntrack]
[  226.541776]  [<ffffffffa011f74b>] nf_ct_l4proto_pernet_unregister+0x5b/0x90 [nf_conntrack]
[  226.541776]  [<ffffffffa0162409>] proto_gre_net_exit+0x19/0x30 [nf_conntrack_proto_gre]
[  226.541776]  [<ffffffff815edf89>] ops_exit_list.isra.1+0x39/0x60
[  226.541776]  [<ffffffff815eecc0>] cleanup_net+0x100/0x1d0
[  226.541776]  [<ffffffff810a608a>] process_one_work+0x1ea/0x4f0
[  226.541776]  [<ffffffff810a6028>] ? process_one_work+0x188/0x4f0
[  226.541776]  [<ffffffff810a64ab>] worker_thread+0x11b/0x3a0
[  226.541776]  [<ffffffff810a6390>] ? process_one_work+0x4f0/0x4f0
[  226.541776]  [<ffffffff810af42d>] kthread+0xed/0x110
[  226.541776]  [<ffffffff8173d4dc>] ? _raw_spin_unlock_irq+0x2c/0x40
[  226.541776]  [<ffffffff810af340>] ? kthread_create_on_node+0x200/0x200
[  226.541776]  [<ffffffff8174747c>] ret_from_fork+0x7c/0xb0
[  226.541776]  [<ffffffff810af340>] ? kthread_create_on_node+0x200/0x200
[  226.541776] Code: 00 00 55 48 8b 17 48 b9 00 01 10 00 00 00 ad de
48 8b 47 08 48 89 e5 48 39 ca 74 29 48 b9 00 02 20 00 00 00 ad de 48
39 c8 74 7a <4c> 8b 00 4c 39 c7 75 53 4c 8b 42 08 4c 39 c7 75 2b 48 89
42 08
[  226.541776] RIP  [<ffffffff81389ba9>] __list_del_entry+0x29/0xd0
[  226.541776]  RSP <ffff88003730dbd0>
[  226.612193] ---[ end trace 985ae23ddfcc357c ]---

Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-08 10:56:12 +02:00
Linus Torvalds 26c12d9334 Merge branch 'akpm' (incoming from Andrew)
Merge second patch-bomb from Andrew Morton:
 - the rest of MM
 - zram updates
 - zswap updates
 - exit
 - procfs
 - exec
 - wait
 - crash dump
 - lib/idr
 - rapidio
 - adfs, affs, bfs, ufs
 - cris
 - Kconfig things
 - initramfs
 - small amount of IPC material
 - percpu enhancements
 - early ioremap support
 - various other misc things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (156 commits)
  MAINTAINERS: update Intel C600 SAS driver maintainers
  fs/ufs: remove unused ufs_super_block_third pointer
  fs/ufs: remove unused ufs_super_block_second pointer
  fs/ufs: remove unused ufs_super_block_first pointer
  fs/ufs/super.c: add __init to init_inodecache()
  doc/kernel-parameters.txt: add early_ioremap_debug
  arm64: add early_ioremap support
  arm64: initialize pgprot info earlier in boot
  x86: use generic early_ioremap
  mm: create generic early_ioremap() support
  x86/mm: sparse warning fix for early_memremap
  lglock: map to spinlock when !CONFIG_SMP
  percpu: add preemption checks to __this_cpu ops
  vmstat: use raw_cpu_ops to avoid false positives on preemption checks
  slub: use raw_cpu_inc for incrementing statistics
  net: replace __this_cpu_inc in route.c with raw_cpu_inc
  modules: use raw_cpu_write for initialization of per cpu refcount.
  mm: use raw_cpu ops for determining current NUMA node
  percpu: add raw_cpu_ops
  slub: fix leak of 'name' in sysfs_slab_add
  ...
2014-04-07 16:38:06 -07:00
Christoph Lameter 3ed66e910c net: replace __this_cpu_inc in route.c with raw_cpu_inc
The RT_CACHE_STAT_INC macro triggers the new preemption checks
for __this_cpu ops.

I do not see any other synchronization that would allow the use of a
__this_cpu operation here however in commit dbd2915ce8 ("[IPV4]:
RT_CACHE_STAT_INC() warning fix") Andrew justifies the use of
raw_smp_processor_id() here because "we do not care" about races.  In
the past we agreed that the price of disabling interrupts here to get
consistent counters would be too high.  These counters may be inaccurate
due to race conditions.

The use of __this_cpu op improves the situation already from what commit
dbd2915ce8 did since the single instruction emitted on x86 does not
allow the race to occur anymore.  However, non x86 platforms could still
experience a race here.

Trace:

  __this_cpu_add operation in preemptible [00000000] code: avahi-daemon/1193
  caller is __this_cpu_preempt_check+0x38/0x60
  CPU: 1 PID: 1193 Comm: avahi-daemon Tainted: GF            3.12.0-rc4+ #187
  Call Trace:
    check_preemption_disabled+0xec/0x110
    __this_cpu_preempt_check+0x38/0x60
    __ip_route_output_key+0x575/0x8c0
    ip_route_output_flow+0x27/0x70
    udp_sendmsg+0x825/0xa20
    inet_sendmsg+0x85/0xc0
    sock_sendmsg+0x9c/0xd0
    ___sys_sendmsg+0x37c/0x390
    __sys_sendmsg+0x49/0x90
    SyS_sendmsg+0x12/0x20
    tracesys+0xe1/0xe6

Signed-off-by: Christoph Lameter <cl@linux.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07 16:36:14 -07:00
Linus Torvalds 467a9e1633 CPU hotplug notifiers registration fixes for 3.15-rc1
The purpose of this single series of commits from Srivatsa S Bhat (with
 a small piece from Gautham R Shenoy) touching multiple subsystems that use
 CPU hotplug notifiers is to provide a way to register them that will not
 lead to deadlocks with CPU online/offline operations as described in the
 changelog of commit 93ae4f978c (CPU hotplug: Provide lockless versions
 of callback registration functions).
 
 The first three commits in the series introduce the API and document it
 and the rest simply goes through the users of CPU hotplug notifiers and
 converts them to using the new method.
 
 /
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Merge tag 'cpu-hotplug-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull CPU hotplug notifiers registration fixes from Rafael Wysocki:
 "The purpose of this single series of commits from Srivatsa S Bhat
  (with a small piece from Gautham R Shenoy) touching multiple
  subsystems that use CPU hotplug notifiers is to provide a way to
  register them that will not lead to deadlocks with CPU online/offline
  operations as described in the changelog of commit 93ae4f978c ("CPU
  hotplug: Provide lockless versions of callback registration
  functions").

  The first three commits in the series introduce the API and document
  it and the rest simply goes through the users of CPU hotplug notifiers
  and converts them to using the new method"

* tag 'cpu-hotplug-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (52 commits)
  net/iucv/iucv.c: Fix CPU hotplug callback registration
  net/core/flow.c: Fix CPU hotplug callback registration
  mm, zswap: Fix CPU hotplug callback registration
  mm, vmstat: Fix CPU hotplug callback registration
  profile: Fix CPU hotplug callback registration
  trace, ring-buffer: Fix CPU hotplug callback registration
  xen, balloon: Fix CPU hotplug callback registration
  hwmon, via-cputemp: Fix CPU hotplug callback registration
  hwmon, coretemp: Fix CPU hotplug callback registration
  thermal, x86-pkg-temp: Fix CPU hotplug callback registration
  octeon, watchdog: Fix CPU hotplug callback registration
  oprofile, nmi-timer: Fix CPU hotplug callback registration
  intel-idle: Fix CPU hotplug callback registration
  clocksource, dummy-timer: Fix CPU hotplug callback registration
  drivers/base/topology.c: Fix CPU hotplug callback registration
  acpi-cpufreq: Fix CPU hotplug callback registration
  zsmalloc: Fix CPU hotplug callback registration
  scsi, fcoe: Fix CPU hotplug callback registration
  scsi, bnx2fc: Fix CPU hotplug callback registration
  scsi, bnx2i: Fix CPU hotplug callback registration
  ...
2014-04-07 14:55:46 -07:00
Veaceslav Falico 6859e7df6d netdev: remove potentially harmful checks
Currently we're checking a variable for != NULL after actually
dereferencing it, in netdev_lower_get_next_private*().

It's counter-intuitive at best, and can lead to faulty usage (as it implies
that the variable can be NULL), so fix it by removing the useless checks.

Reported-by: Daniel Borkmann <dborkman@redhat.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Nicolas Dichtel <nicolas.dichtel@6wind.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: stephen hemminger <stephen@networkplumber.org>
CC: Jerry Chu <hkchu@google.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-07 15:52:07 -04:00
Daniel Borkmann 6f25cd47dc pktgen: fix xmit test for BQL enabled devices
Similarly as in commit 8e2f1a63f2 ("packet: fix packet_direct_xmit
for BQL enabled drivers"), we test for __QUEUE_STATE_STACK_XOFF bit
in pktgen's xmit, which would not fully fill the device's TX ring for
BQL drivers that use netdev_tx_sent_queue(). Fix is to use, similarly
as we do in packet sockets, netif_xmit_frozen_or_drv_stopped() test.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-07 15:20:44 -04:00
Geert Uytterhoeven 065d7e3956 tipc: Let tipc_release() return 0
net/tipc/socket.c: In function ‘tipc_release’:
net/tipc/socket.c:352: warning: ‘res’ is used uninitialized in this function

Introduced by commit 24be34b5a0 ("tipc:
eliminate upcall function pointers between port and socket"), which
removed the sole initializer of "res".

Just return 0 to fix it.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-07 15:08:17 -04:00
Linus Torvalds 240cd6a817 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph updates from Sage Weil:
 "The biggest chunk is a series of patches from Ilya that add support
  for new Ceph osd and crush map features, including some new tunables,
  primary affinity, and the new encoding that is needed for erasure
  coding support.  This brings things into parity with the server side
  and the looming firefly release.  There is also support for allocation
  hints in RBD that help limit fragmentation on the server side.

  There is also a series of patches from Zheng fixing NFS reexport,
  directory fragmentation support, flock vs fnctl behavior, and some
  issues with clustered MDS.

  Finally, there are some miscellaneous fixes from Yunchuan Wen for
  fscache, Fabian Frederick for ACLs, and from me for fsync(dirfd)
  behavior"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (79 commits)
  ceph: skip invalid dentry during dcache readdir
  libceph: dump pool {read,write}_tier to debugfs
  libceph: output primary affinity values on osdmap updates
  ceph: flush cap release queue when trimming session caps
  ceph: don't grabs open file reference for aborted request
  ceph: drop extra open file reference in ceph_atomic_open()
  ceph: preallocate buffer for readdir reply
  libceph: enable PRIMARY_AFFINITY feature bit
  libceph: redo ceph_calc_pg_primary() in terms of ceph_calc_pg_acting()
  libceph: add support for osd primary affinity
  libceph: add support for primary_temp mappings
  libceph: return primary from ceph_calc_pg_acting()
  libceph: switch ceph_calc_pg_acting() to new helpers
  libceph: introduce apply_temps() helper
  libceph: introduce pg_to_raw_osds() and raw_to_up_osds() helpers
  libceph: ceph_can_shift_osds(pool) and pool type defines
  libceph: ceph_osd_{exists,is_up,is_down}(osd) definitions
  libceph: enable OSDMAP_ENC feature bit
  libceph: primary_affinity decode bits
  libceph: primary_affinity infrastructure
  ...
2014-04-07 11:09:13 -07:00
Jean Sacren 6c6a985556 mac802154: fix duplicate #include headers
The commit e6278d9200 ("mac802154: use header operations to
create/parse headers") included the header

		net/ieee802154_netdev.h

which had been included by the commit b70ab2e87f ("ieee802154:
enforce consistent endianness in the 802.15.4 stack"). Fix this
duplicate #include by deleting the latter one as the required header
has already been in place.

Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Cc: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Cc: linux-zigbee-devel@lists.sourceforge.net
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-07 13:18:44 -04:00
Daniel Borkmann 5f9fde5f79 net: filter: be more defensive on div/mod by X==0
The old interpreter behaviour was that we returned with 0
whenever we found a division by 0 would take place. In the new
interpreter we would currently just skip that instead and
continue execution.

It's true that a value of 0 as return might not be appropriate
in all cases, but current users (socket filters -> drop
packet, seccomp -> SECCOMP_RET_KILL, cls_bpf -> unclassified,
etc) seem fine with that behaviour. Better this than undefined
BPF program behaviour as it's expected that A contains the
result of the division. In future, as more use cases open up,
we could further adapt this return value to our needs, if
necessary.

So reintroduce return of 0 for division by 0 as in the old
interpreter. Also in case of K which is guaranteed to be 32bit
wide, sk_chk_filter() already takes care of preventing division
by 0 invoked through K, so we can generally spare us these tests.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Reviewed-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-07 12:54:39 -04:00
Linus Torvalds 2b3a8fd735 NFS client updates for Linux 3.15
Highlights include:
 
 - Stable fix for a use after free issue in the NFSv4.1 open code
 - Fix the SUNRPC bi-directional RPC code to account for TCP segmentation
 - Optimise usage of readdirplus when confronted with 'ls -l' situations
 - Soft mount bugfixes
 - NFS over RDMA bugfixes
 - NFSv4 close locking fixes
 - Various NFSv4.x client state management optimisations
 - Rename/unlink code cleanups
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Merge tag 'nfs-for-3.15-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Highlights include:

   - Stable fix for a use after free issue in the NFSv4.1 open code
   - Fix the SUNRPC bi-directional RPC code to account for TCP segmentation
   - Optimise usage of readdirplus when confronted with 'ls -l' situations
   - Soft mount bugfixes
   - NFS over RDMA bugfixes
   - NFSv4 close locking fixes
   - Various NFSv4.x client state management optimisations
   - Rename/unlink code cleanups"

* tag 'nfs-for-3.15-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (28 commits)
  nfs: pass string length to pr_notice message about readdir loops
  NFSv4: Fix a use-after-free problem in open()
  SUNRPC: rpc_restart_call/rpc_restart_call_prepare should clear task->tk_status
  SUNRPC: Don't let rpc_delay() clobber non-timeout errors
  SUNRPC: Ensure call_connect_status() deals correctly with SOFTCONN tasks
  SUNRPC: Ensure call_status() deals correctly with SOFTCONN tasks
  NFSv4: Ensure we respect soft mount timeouts during trunking discovery
  NFSv4: Schedule recovery if nfs40_walk_client_list() is interrupted
  NFS: advertise only supported callback netids
  SUNRPC: remove KERN_INFO from dprintk() call sites
  SUNRPC: Fix large reads on NFS/RDMA
  NFS: Clean up: revert increase in READDIR RPC buffer max size
  SUNRPC: Ensure that call_bind times out correctly
  SUNRPC: Ensure that call_connect times out correctly
  nfs: emit a fsnotify_nameremove call in sillyrename codepath
  nfs: remove synchronous rename code
  nfs: convert nfs_rename to use async_rename infrastructure
  nfs: make nfs_async_rename non-static
  nfs: abstract out code needed to complete a sillyrename
  NFSv4: Clear the open state flags if the new stateid does not match
  ...
2014-04-06 10:09:38 -07:00
Thomas Graf c58dd2dd44 netfilter: Can't fail and free after table replacement
All xtables variants suffer from the defect that the copy_to_user()
to copy the counters to user memory may fail after the table has
already been exchanged and thus exposed. Return an error at this
point will result in freeing the already exposed table. Any
subsequent packet processing will result in a kernel panic.

We can't copy the counters before exposing the new tables as we
want provide the counter state after the old table has been
unhooked. Therefore convert this into a silent error.

Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-05 17:46:22 +02:00
Ilya Dryomov 8a53f23fcd libceph: dump pool {read,write}_tier to debugfs
Dump pool {read,write}_tier to debugfs.  While at it, fixup printk type
specifiers and remove the unnecessary cast to unsigned long long.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
2014-04-04 21:08:29 -07:00
Ilya Dryomov f31da0f3e1 libceph: output primary affinity values on osdmap updates
Similar to osd weights, output primary affinity values on incremental
osdmap updates.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
2014-04-04 21:08:28 -07:00
Ilya Dryomov c4c1228525 libceph: redo ceph_calc_pg_primary() in terms of ceph_calc_pg_acting()
Reimplement ceph_calc_pg_primary() in terms of ceph_calc_pg_acting()
and get rid of the now unused calc_pg_raw().

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:19 -07:00
Ilya Dryomov 47ec1f3cc4 libceph: add support for osd primary affinity
Respond to non-default primary_affinity values accordingly.  (Primary
affinity allows the admin to shift 'primary responsibility' away from
specific osds, effectively shifting around the read side of the
workload and whatever overhead is incurred by peering and writes by
virtue of being the primary).

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:17 -07:00
Ilya Dryomov 5e8d4d36bf libceph: add support for primary_temp mappings
Change apply_temp() to override primary in the same way pg_temp
overrides osd set.  primary_temp overrides pg_temp primary too.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:16 -07:00
Ilya Dryomov 8008ab1080 libceph: return primary from ceph_calc_pg_acting()
In preparation for adding support for primary_temp, stop assuming
primaryness: add a primary out parameter to ceph_calc_pg_acting() and
change call sites accordingly.  Primary is now specified separately
from the order of osds in the set.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:14 -07:00
Ilya Dryomov ac972230e2 libceph: switch ceph_calc_pg_acting() to new helpers
Switch ceph_calc_pg_acting() to new helpers: pg_to_raw_osds(),
raw_to_up_osds() and apply_temps().

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:13 -07:00
Ilya Dryomov 45966c3467 libceph: introduce apply_temps() helper
apply_temp() helper for applying various temporary mappings (at this
point only pg_temp mappings) to the up set, therefore transforming it
into an acting set.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:11 -07:00
Ilya Dryomov 2bd93d4d7e libceph: introduce pg_to_raw_osds() and raw_to_up_osds() helpers
pg_to_raw_osds() helper for computing a raw (crush) set, which can
contain non-existant and down osds.

raw_to_up_osds() helper for pruning non-existant and down osds from the
raw set, therefore transforming it into an up set, and determining up
primary.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:10 -07:00
Ilya Dryomov 63a6993f52 libceph: primary_affinity decode bits
Add two helpers to decode primary_affinity (full map, vector<u32>) and
new_primary_affinity (inc map, map<u32, u32>) and switch to them.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:04 -07:00
Ilya Dryomov 2cfa34f2d6 libceph: primary_affinity infrastructure
Add primary_affinity infrastructure.  primary_affinity values are
stored in an max_osd-sized array, hanging off ceph_osdmap, similar to
a osd_weight array.

Introduce {get,set}_primary_affinity() helpers, primarily to return
CEPH_OSD_DEFAULT_PRIMARY_AFFINITY when no affinity has been set and to
abstract out osd_primary_affinity array allocation and initialization.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:02 -07:00
Ilya Dryomov d286de796a libceph: primary_temp decode bits
Add a common helper to decode both primary_temp (full map, map<pg_t,
u32>) and new_primary_temp (inc map, same) and switch to it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:08:00 -07:00
Ilya Dryomov 9686f94c8c libceph: primary_temp infrastructure
Add primary_temp mappings infrastructure.  struct ceph_pg_mapping is
overloaded, primary_temp mappings are stored in an rb-tree, rooted at
ceph_osdmap, in a manner similar to pg_temp mappings.

Dump primary_temp mappings to /sys/kernel/debug/ceph/<client>/osdmap,
one 'primary_temp <pgid> <osd>' per line, e.g:

    primary_temp 2.6 4

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:58 -07:00
Ilya Dryomov 35a935d75d libceph: generalize ceph_pg_mapping
In preparation for adding support for primary_temp mappings, generalize
struct ceph_pg_mapping so it can hold mappings other than pg_temp.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:57 -07:00
Ilya Dryomov ec7af97258 libceph: introduce get_osdmap_client_data_v()
Full and incremental osdmaps are structured identically and have
identical headers.  Add a helper to decode both "old" (16-bit version,
v6) and "new" (8-bit struct_v+struct_compat+struct_len, v7) osdmap
enconding headers and switch to it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:55 -07:00
Ilya Dryomov 10db634e20 libceph: introduce decode{,_new}_pg_temp() and switch to them
Consolidate pg_temp (full map, map<pg_t, vector<u32>>) and new_pg_temp
(inc map, same) decoding logic into a common helper and switch to it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:53 -07:00
Ilya Dryomov 4d60351f90 libceph: switch osdmap_set_max_osd() to krealloc()
Use krealloc() instead of rolling our own.  (krealloc() with a NULL
first argument acts as a kmalloc()).  Properly initalize the new array
elements.  This is needed to make future additions to osdmap easier.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:52 -07:00
Ilya Dryomov 433fbdd31d libceph: introduce decode{,_new}_pools() and switch to them
Consolidate pools (full map, map<u64, pg_pool_t>) and new_pools (inc
map, same) decoding logic into a common helper and switch to it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:50 -07:00
Ilya Dryomov 0f70c7eedb libceph: rename __decode_pool{,_names}() to decode_pool{,_names}()
To be in line with all the other osdmap decode helpers.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:49 -07:00
Ilya Dryomov 53bbaba9d8 libceph: fix and clarify ceph_decode_need() sizes
Sum up sizeof(...) results instead of (incorrectly) hard-coding the
number of bytes, expressed in ints and longs.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:47 -07:00
Ilya Dryomov 9464d00862 libceph: nuke bogus encoding version check in osdmap_apply_incremental()
Only version 6 of osdmap encoding is supported, anything other than
version 6 results in an error and halts the decoding process.  Checking
if version is >= 5 is therefore bogus.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:46 -07:00
Ilya Dryomov 86f1742b94 libceph: fixup error handling in osdmap_apply_incremental()
The existing error handling scheme requires resetting err to -EINVAL
prior to calling any ceph_decode_* macro.  This is ugly and fragile,
and there already are a few places where we would return 0 on error,
due to a missing reset.  Follow osdmap_decode() and fix this by adding
a special e_inval label to be used by all ceph_decode_* macros.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:44 -07:00
Ilya Dryomov 9902e682c7 libceph: fix crush_decode() call site in osdmap_decode()
The size of the memory area feeded to crush_decode() should be limited
not only by osdmap end, but also by the crush map length.  Also, drop
unnecessary dout() (dout() in crush_decode() conveys the same info) and
step past crush map only if it is decoded successfully.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:43 -07:00
Ilya Dryomov 2d88b2e081 libceph: check length of osdmap osd arrays
Check length of osd_state, osd_weight and osd_addr arrays.  They
should all have exactly max_osd elements after the call to
osdmap_set_max_osd().

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:41 -07:00
Ilya Dryomov 3977058c46 libceph: safely decode max_osd value in osdmap_decode()
max_osd value is not covered by any ceph_decode_need().  Use a safe
version of ceph_decode_* macro to decode it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:40 -07:00
Ilya Dryomov 597b52f6ca libceph: fixup error handling in osdmap_decode()
The existing error handling scheme requires resetting err to -EINVAL
prior to calling any ceph_decode_* macro.  This is ugly and fragile,
and there already are a few places where we would return 0 on error,
due to a missing reset.  Fix this by adding a special e_inval label to
be used by all ceph_decode_* macros.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:38 -07:00
Ilya Dryomov a2505d63ee libceph: split osdmap allocation and decode steps
Split osdmap allocation and initialization into a separate function,
ceph_osdmap_decode().

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:37 -07:00
Ilya Dryomov 38a8d56023 libceph: dump osdmap and enhance output on decode errors
Dump osdmap in hex on both full and incremental decode errors, to make
it easier to match the contents with error offset.  dout() map epoch
and max_osd value on success.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:35 -07:00
Ilya Dryomov 1c00240e00 libceph: dump pg_temp mappings to debugfs
Dump pg_temp mappings to /sys/kernel/debug/ceph/<client>/osdmap,
one 'pg_temp <pgid> [<osd>, ..., <osd>]' per line, e.g:

    pg_temp 2.6 [2,3,4]

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:34 -07:00
Ilya Dryomov 0a2800d728 libceph: do not prefix osd lines with \t in debugfs output
To save screen space in anticipation of more fields (e.g. primary
affinity).

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:32 -07:00
Ilya Dryomov 35fea3a18a libceph: refer to osdmap directly in osdmap_show()
To make it more readable and save screen space.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-04 21:07:31 -07:00
Ilya Dryomov d83ed858f1 crush: add SET_CHOOSELEAF_VARY_R step
This lets you adjust the vary_r tunable on a per-rule basis.

Reflects ceph.git commit f944ccc20aee60a7d8da7e405ec75ad1cd449fac.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
2014-04-04 21:07:28 -07:00
Ilya Dryomov e2b149cc4b crush: add chooseleaf_vary_r tunable
The current crush_choose_firstn code will re-use the same 'r' value for
the recursive call.  That means that if we are hitting a collision or
rejection for some reason (say, an OSD that is marked out) and need to
retry, we will keep making the same (bad) choice in that recursive
selection.

Introduce a tunable that fixes that behavior by incorporating the parent
'r' value into the recursive starting point, so that a different path
will be taken in subsequent placement attempts.

Note that this was done from the get-go for the new crush_choose_indep
algorithm.

This was exposed by a user who was seeing PGs stuck in active+remapped
after reweight-by-utilization because the up set mapped to a single OSD.

Reflects ceph.git commit a8e6c9fbf88bad056dd05d3eb790e98a5e43451a.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
2014-04-04 21:07:26 -07:00
Ilya Dryomov 6ed1002f36 crush: allow crush rules to set (re)tries counts to 0
These two fields are misnomers; they are *retry* counts.

Reflects ceph.git commit f17caba8ae0cad7b6f8f35e53e5f73b444696835.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
2014-04-04 21:07:25 -07:00
Ilya Dryomov 48a163dbb5 crush: fix off-by-one errors in total_tries refactor
Back in 27f4d1f6bc32c2ed7b2c5080cbd58b14df622607 we refactored the CRUSH
code to allow adjustment of the retry counts on a per-pool basis.  That
commit had an off-by-one bug: the previous "tries" counter was a *retry*
count, not a *try* count, but the new code was passing in 1 meaning
there should be no retries.

Fix the ftotal vs tries comparison to use < instead of <= to fix the
problem.  Note that the original code used <= here, which means the
global "choose_total_tries" tunable is actually counting retries.
Compensate for that by adding 1 in crush_do_rule when we pull the tunable
into the local variable.

This was noticed looking at output from a user provided osdmap.
Unfortunately the map doesn't illustrate the change in mapping behavior
and I haven't managed to construct one yet that does.  Inspection of the
crush debug output now aligns with prior versions, though.

Reflects ceph.git commit 795704fd615f0b008dcc81aa088a859b2d075138.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
2014-04-04 21:07:23 -07:00
Yan, Zheng d90deda69c libceph: fix oops in ceph_msg_data_{pages,pagelist}_advance()
When there is no more data, ceph_msg_data_{pages,pagelist}_advance()
should not move on to the next page.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
2014-04-04 21:07:15 -07:00
Pablo Neira Ayuso 2fec6bb6f4 netfilter: nf_tables: fix wrong format in request_module()
The intended format in request_module is %.*s instead of %*.s.

Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-03 23:52:50 +02:00
Pablo Neira Ayuso a9bdd83656 netfilter: nf_tables: set names cannot be larger than 15 bytes
Currently, nf_tables trims off the set name if it exceeeds 15
bytes, so explicitly reject set names that are too large.

Reported-by: Giuseppe Longo <giuseppelng@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-03 23:52:44 +02:00
Kirill Tkhai b8ddd9eac8 netfilter: Add {ipt,ip6t}_osf aliases for xt_osf
There are no these aliases, so kernel can not request appropriate
match table:

$ iptables -I INPUT -p tcp -m osf --genre Windows --ttl 2 -j DROP
iptables: No chain/target/match by that name.

setsockopt() requests ipt_osf module, which is not present. Add
the aliases.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-03 23:52:22 +02:00
Alexey Perevalov a00e76349f netfilter: x_tables: allow to use cgroup match for LOCAL_IN nf hooks
This simple modification allows iptables to work with INPUT chain
in combination with cgroup module. It could be useful for counting
ingress traffic per cgroup with nfacct netfilter module. There
were no problems to count the egress traffic that way formerly.

It's possible to get classified sk_buff after PREROUTING, due to
socket lookup being done in early_demux (tcp_v4_early_demux). Also
it works for udp as well.

Trivial usage example, assuming we're in the same shell every step
and we have enough permissions:

1) Classic net_cls cgroup initialization:

  mkdir /sys/fs/cgroup/net_cls
  mount -t cgroup -o net_cls net_cls /sys/fs/cgroup/net_cls

2) Set up cgroup for interesting application:

  mkdir /sys/fs/cgroup/net_cls/wget
  echo 1 > /sys/fs/cgroup/net_cls/wget/net_cls.classid
  echo $BASHPID > /sys/fs/cgroup/net_cls/wget/cgroup.procs

3) Create kernel counters:

  nfacct add wget-cgroup-in
  iptables -A INPUT -m cgroup ! --cgroup 1 -m nfacct --nfacct-name wget-cgroup-in

  nfacct add wget-cgroup-out
  iptables -A OUTPUT -m cgroup ! --cgroup 1 -m nfacct --nfacct-name wget-cgroup-out

4) Network usage:

  wget https://www.kernel.org/pub/linux/kernel/v3.x/testing/linux-3.14-rc6.tar.xz

5) Check results:

  nfacct list

Cgroup approach is being used for the DataUsage (counting & blocking
traffic) feature for Samsung's modification of the Tizen OS.

Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-03 23:52:17 +02:00
Florian Westphal e00b437b3d netfilter: connlimit: move lock array out of struct connlimit_data
Eric points out that the locks can be global.
Moreover, both Jesper and Eric note that using only 32 locks increases
false sharing as only two cache lines are used.

This increases locks to 256 (16 cache lines assuming 64byte cacheline and
4 bytes per spinlock).

Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-03 23:52:13 +02:00
Florian Westphal e5ac6eafba netfilter: connlimit: fix UP build
cannot use ARRAY_SIZE() if spinlock_t is empty struct.

Fixes: 1442e7507d ("netfilter: connlimit: use keyed locks")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2014-04-03 23:52:07 +02:00
Eric Dumazet e33d0ba804 net-gro: reset skb->truesize in napi_reuse_skb()
Recycling skb always had been very tough...

This time it appears GRO layer can accumulate skb->truesize
adjustments made by drivers when they attach a fragment to skb.

skb_gro_receive() can only subtract from skb->truesize the used part
of a fragment.

I spotted this problem seeing TcpExtPruneCalled and
TcpExtTCPRcvCollapsed that were unexpected with a recent kernel, where
TCP receive window should be sized properly to accept traffic coming
from a driver not overshooting skb->truesize.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-03 16:17:52 -04:00
Linus Torvalds 32d01dc7be Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
 "A lot updates for cgroup:

   - The biggest one is cgroup's conversion to kernfs.  cgroup took
     after the long abandoned vfs-entangled sysfs implementation and
     made it even more convoluted over time.  cgroup's internal objects
     were fused with vfs objects which also brought in vfs locking and
     object lifetime rules.  Naturally, there are places where vfs rules
     don't fit and nasty hacks, such as credential switching or lock
     dance interleaving inode mutex and cgroup_mutex with object serial
     number comparison thrown in to decide whether the operation is
     actually necessary, needed to be employed.

     After conversion to kernfs, internal object lifetime and locking
     rules are mostly isolated from vfs interactions allowing shedding
     of several nasty hacks and overall simplification.  This will also
     allow implmentation of operations which may affect multiple cgroups
     which weren't possible before as it would have required nesting
     i_mutexes.

   - Various simplifications including dropping of module support,
     easier cgroup name/path handling, simplified cgroup file type
     handling and task_cg_lists optimization.

   - Prepatory changes for the planned unified hierarchy, which is still
     a patchset away from being actually operational.  The dummy
     hierarchy is updated to serve as the default unified hierarchy.
     Controllers which aren't claimed by other hierarchies are
     associated with it, which BTW was what the dummy hierarchy was for
     anyway.

   - Various fixes from Li and others.  This pull request includes some
     patches to add missing slab.h to various subsystems.  This was
     triggered xattr.h include removal from cgroup.h.  cgroup.h
     indirectly got included a lot of files which brought in xattr.h
     which brought in slab.h.

  There are several merge commits - one to pull in kernfs updates
  necessary for converting cgroup (already in upstream through
  driver-core), others for interfering changes in the fixes branch"

* 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (74 commits)
  cgroup: remove useless argument from cgroup_exit()
  cgroup: fix spurious lockdep warning in cgroup_exit()
  cgroup: Use RCU_INIT_POINTER(x, NULL) in cgroup.c
  cgroup: break kernfs active_ref protection in cgroup directory operations
  cgroup: fix cgroup_taskset walking order
  cgroup: implement CFTYPE_ONLY_ON_DFL
  cgroup: make cgrp_dfl_root mountable
  cgroup: drop const from @buffer of cftype->write_string()
  cgroup: rename cgroup_dummy_root and related names
  cgroup: move ->subsys_mask from cgroupfs_root to cgroup
  cgroup: treat cgroup_dummy_root as an equivalent hierarchy during rebinding
  cgroup: remove NULL checks from [pr_cont_]cgroup_{name|path}()
  cgroup: use cgroup_setup_root() to initialize cgroup_dummy_root
  cgroup: reorganize cgroup bootstrapping
  cgroup: relocate setting of CGRP_DEAD
  cpuset: use rcu_read_lock() to protect task_cs()
  cgroup_freezer: document freezer_fork() subtleties
  cgroup: update cgroup_transfer_tasks() to either succeed or fail
  cgroup: drop task_lock() protection around task->cgroups
  cgroup: update how a newly forked task gets associated with css_set
  ...
2014-04-03 13:05:42 -07:00
Erik Hugne a5e7ac5ce1 tipc: fix regression bug where node events are not being generated
Commit 5902385a24 ("tipc: obsolete
the remote management feature") introduces a regression where node
topology events are not being generated because the publication
that triggers this: {0, <z.c.n>, <z.c.n>} is no longer available.
This will break applications that rely on node events to discover
when nodes join/leave a cluster.

We fix this by advertising the node publication when TIPC enters
networking mode, and withdraws it upon shutdown.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-03 16:03:57 -04:00
Jiri Pirko d0290214de net: add busy_poll device feature
Currently there is no way how to find out if a device supports busy
polling. So add a feature and make it dependent on ndo_busy_poll
existence.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-03 14:31:34 -04:00
Daniel Borkmann 8e2f1a63f2 packet: fix packet_direct_xmit for BQL enabled drivers
Currently, in packet_direct_xmit() we test the assigned netdevice queue
for netif_xmit_frozen_or_stopped() before doing an ndo_start_xmit().

This can have the side-effect that BQL enabled drivers which make use
of netdev_tx_sent_queue() internally, set __QUEUE_STATE_STACK_XOFF from
within the stack and would not fully fill the device's TX ring from
packet sockets with PACKET_QDISC_BYPASS enabled.

Instead, use a test without BQL bit so that bursts can be absorbed
into the NICs TX ring. Fix and code suggested by Eric Dumazet, thanks!

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-03 14:29:12 -04:00
Daniel Borkmann 0f97ede45e packet: report tx_dropped in packet_direct_xmit
Since commit 015f0688f5 ("net: net: add a core netdev->tx_dropped
counter"), we can now account for TX drops from within the core
stack instead of drivers.

Therefore, fix packet_direct_xmit() and increase drop count when we
encounter a problem before driver's xmit function was called (we do
not want to doubly account for it).

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-03 14:29:11 -04:00
Thomas Huth 1dad093b66 s390/irq: Use defines for external interruption codes
Use the new defines for external interruption codes to get rid
of "magic" numbers in the s390 source code. And while we're at it,
also rename the (un-)register_external_interrupt function to
something shorter so that this patch does not exceed the 80
columns all over the place.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-04-03 14:30:52 +02:00
Linus Torvalds cd6362befe Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Here is my initial pull request for the networking subsystem during
  this merge window:

   1) Support for ESN in AH (RFC 4302) from Fan Du.

   2) Add full kernel doc for ethtool command structures, from Ben
      Hutchings.

   3) Add BCM7xxx PHY driver, from Florian Fainelli.

   4) Export computed TCP rate information in netlink socket dumps, from
      Eric Dumazet.

   5) Allow IPSEC SA to be dumped partially using a filter, from Nicolas
      Dichtel.

   6) Convert many drivers to pci_enable_msix_range(), from Alexander
      Gordeev.

   7) Record SKB timestamps more efficiently, from Eric Dumazet.

   8) Switch to microsecond resolution for TCP round trip times, also
      from Eric Dumazet.

   9) Clean up and fix 6lowpan fragmentation handling by making use of
      the existing inet_frag api for it's implementation.

  10) Add TX grant mapping to xen-netback driver, from Zoltan Kiss.

  11) Auto size SKB lengths when composing netlink messages based upon
      past message sizes used, from Eric Dumazet.

  12) qdisc dumps can take a long time, add a cond_resched(), From Eric
      Dumazet.

  13) Sanitize netpoll core and drivers wrt.  SKB handling semantics.
      Get rid of never-used-in-tree netpoll RX handling.  From Eric W
      Biederman.

  14) Support inter-address-family and namespace changing in VTI tunnel
      driver(s).  From Steffen Klassert.

  15) Add Altera TSE driver, from Vince Bridgers.

  16) Optimizing csum_replace2() so that it doesn't adjust the checksum
      by checksumming the entire header, from Eric Dumazet.

  17) Expand BPF internal implementation for faster interpreting, more
      direct translations into JIT'd code, and much cleaner uses of BPF
      filtering in non-socket ocntexts.  From Daniel Borkmann and Alexei
      Starovoitov"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1976 commits)
  netpoll: Use skb_irq_freeable to make zap_completion_queue safe.
  net: Add a test to see if a skb is freeable in irq context
  qlcnic: Fix build failure due to undefined reference to `vxlan_get_rx_port'
  net: ptp: move PTP classifier in its own file
  net: sxgbe: make "core_ops" static
  net: sxgbe: fix logical vs bitwise operation
  net: sxgbe: sxgbe_mdio_register() frees the bus
  Call efx_set_channels() before efx->type->dimension_resources()
  xen-netback: disable rogue vif in kthread context
  net/mlx4: Set proper build dependancy with vxlan
  be2net: fix build dependency on VxLAN
  mac802154: make csma/cca parameters per-wpan
  mac802154: allow only one WPAN to be up at any given time
  net: filter: minor: fix kdoc in __sk_run_filter
  netlink: don't compare the nul-termination in nla_strcmp
  can: c_can: Avoid led toggling for every packet.
  can: c_can: Simplify TX interrupt cleanup
  can: c_can: Store dlc private
  can: c_can: Reduce register access
  can: c_can: Make the code readable
  ...
2014-04-02 20:53:45 -07:00
Ilya Dryomov c647b8a8c6 libceph: add support for CEPH_OSD_OP_SETALLOCHINT osd op
This is primarily for rbd's benefit and is supposed to combat
fragmentation:

"... knowing that rbd images have a 4m size, librbd can pass a hint
that will let the osd do the xfs allocation size ioctl on new files so
that they are allocated in 1m or 4m chunks.  We've seen cases where
users with rbd workloads have very high levels of fragmentation in xfs
and this would mitigate that and probably have a pretty nice
performance benefit."

SETALLOCHINT is considered advisory, so our backwards compatibility
mechanism here is to set FAILOK flag for all SETALLOCHINT ops.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-03 10:33:51 +08:00
Ilya Dryomov 7b25bf5f02 libceph: encode CEPH_OSD_OP_FLAG_* op flags
Encode ceph_osd_op::flags field so that it gets sent over the wire.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
2014-04-03 10:33:51 +08:00
Ilya Dryomov 9d521470a4 libceph: a per-osdc crush scratch buffer
With the addition of erasure coding support in the future, scratch
variable-length array in crush_do_rule_ary() is going to grow to at
least 200 bytes on average, on top of another 128 bytes consumed by
rawosd/osd arrays in the call chain.  Replace it with a buffer inside
struct osdmap and a mutex.  This shouldn't result in any contention,
because all osd requests were already serialized by request_mutex at
that point; the only unlocked caller was ceph_ioctl_get_dataloc().

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
2014-04-03 10:33:50 +08:00
Linus Torvalds 0f1b1e6d73 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID updates from Jiri Kosina:
 - substantial cleanup of the generic and transport layers, in the
   direction of an ultimate goal of making struct hid_device completely
   transport independent, by Benjamin Tissoires
 - cp2112 driver from David Barksdale
 - a lot of fixes and new hardware support (Dualshock 4) to hid-sony
   driver, by Frank Praznik
 - support for Win 8.1 multitouch protocol by Andrew Duggan
 - other smaller fixes / device ID additions

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (75 commits)
  HID: sony: fix force feedback mismerge
  HID: sony: Set the quriks flag for Bluetooth controllers
  HID: sony: Fix Sixaxis cable state detection
  HID: uhid: Add UHID_CREATE2 + UHID_INPUT2
  HID: hyperv: fix _raw_request() prototype
  HID: hyperv: Implement a stub raw_request() entry point
  HID: hid-sensor-hub: fix sleeping function called from invalid context
  HID: multitouch: add support for Win 8.1 multitouch touchpads
  HID: remove hid_output_raw_report transport implementations
  HID: sony: do not rely on hid_output_raw_report
  HID: cp2112: remove the last hid_output_raw_report() call
  HID: cp2112: remove various hid_out_raw_report calls
  HID: multitouch: add support of other generic collections in hid-mt
  HID: multitouch: remove pen special handling
  HID: multitouch: remove registered devices with default behavior
  HID: hidp: Add a comment that some devices depend on the current behavior of uniq
  HID: sony: Prevent duplicate controller connections.
  HID: sony: Perform a boundry check on the sixaxis battery level index.
  HID: sony: Fix work queue issues
  HID: sony: Fix multi-line comment styling
  ...
2014-04-02 16:24:28 -07:00
Linus Torvalds 159d8133d0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial tree updates from Jiri Kosina:
 "Usual rocket science -- mostly documentation and comment updates"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  sparse: fix comment
  doc: fix double words
  isdn: capi: fix "CAPI_VERSION" comment
  doc: DocBook: Fix typos in xml and template file
  Bluetooth: add module name for btwilink
  driver core: unexport static function create_syslog_header
  mmc: core: typo fix in printk specifier
  ARM: spear: clean up editing mistake
  net-sysfs: fix comment typo 'CONFIG_SYFS'
  doc: Insert MODULE_ in module-signing macros
  Documentation: update URL to hfsplus Technote 1150
  gpio: update path to documentation
  ixgbe: Fix format string in ixgbe_fcoe.
  Kconfig: Remove useless "default N" lines
  user_namespace.c: Remove duplicated word in comment
  CREDITS: fix formatting
  treewide: Fix typo in Documentation/DocBook
  mm: Fix warning on make htmldocs caused by slab.c
  ata: ata-samsung_cf: cleanup in header file
  idr: remove unused prototype of idr_free()
2014-04-02 16:23:38 -07:00
Linus Torvalds 7a48837732 Merge branch 'for-3.15/core' of git://git.kernel.dk/linux-block
Pull core block layer updates from Jens Axboe:
 "This is the pull request for the core block IO bits for the 3.15
  kernel.  It's a smaller round this time, it contains:

   - Various little blk-mq fixes and additions from Christoph and
     myself.

   - Cleanup of the IPI usage from the block layer, and associated
     helper code.  From Frederic Weisbecker and Jan Kara.

   - Duplicate code cleanup in bio-integrity from Gu Zheng.  This will
     give you a merge conflict, but that should be easy to resolve.

   - blk-mq notify spinlock fix for RT from Mike Galbraith.

   - A blktrace partial accounting bug fix from Roman Pen.

   - Missing REQ_SYNC detection fix for blk-mq from Shaohua Li"

* 'for-3.15/core' of git://git.kernel.dk/linux-block: (25 commits)
  blk-mq: add REQ_SYNC early
  rt,blk,mq: Make blk_mq_cpu_notify_lock a raw spinlock
  blk-mq: support partial I/O completions
  blk-mq: merge blk_mq_insert_request and blk_mq_run_request
  blk-mq: remove blk_mq_alloc_rq
  blk-mq: don't dump CPU -> hw queue map on driver load
  blk-mq: fix wrong usage of hctx->state vs hctx->flags
  blk-mq: allow blk_mq_init_commands() to return failure
  block: remove old blk_iopoll_enabled variable
  blktrace: fix accounting of partially completed requests
  smp: Rename __smp_call_function_single() to smp_call_function_single_async()
  smp: Remove wait argument from __smp_call_function_single()
  watchdog: Simplify a little the IPI call
  smp: Move __smp_call_function_single() below its safe version
  smp: Consolidate the various smp_call_function_single() declensions
  smp: Teach __smp_call_function_single() to check for offline cpus
  smp: Remove unused list_head from csd
  smp: Iterate functions through llist_for_each_entry_safe()
  block: Stop abusing rq->csd.list in blk-softirq
  block: Remove useless IPI struct initialization
  ...
2014-04-01 19:19:15 -07:00
Eric W. Biederman b1586f099b netpoll: Use skb_irq_freeable to make zap_completion_queue safe.
Replace the test in zap_completion_queue to test when it is safe to
free skbs in hard irq context with skb_irq_freeable ensuring we only
free skbs when it is safe, and removing the possibility of subtle
problems.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 17:53:36 -04:00
Daniel Borkmann 408eccce32 net: ptp: move PTP classifier in its own file
This commit fixes a build error reported by Fengguang, that is
triggered when CONFIG_NETWORK_PHY_TIMESTAMPING is not set:

  ERROR: "ptp_classify_raw" [drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe.ko] undefined!

The fix is to introduce its own file for the PTP BPF classifier,
so that PTP_1588_CLOCK and/or NETWORK_PHY_TIMESTAMPING can select
it independently from each other. IXP4xx driver on ARM needs to
select it as well since it does not seem to select PTP_1588_CLOCK
or similar that would pull it in automatically.

This also allows for hiding all of the internals of the BPF PTP
program inside that file, and only exporting relevant API bits
to drivers.

This patch also adds a kdoc documentation of ptp_classify_raw()
API to make it clear that it can return PTP_CLASS_* defines. Also,
the BPF program has been translated into bpf_asm code, so that it
can be more easily read and altered (extensively documented in [1]).

In the kernel tree under tools/net/ we have bpf_asm and bpf_dbg
tools, so the commented program can simply be translated via
`./bpf_asm -c prog` where prog is a file that contains the
commented code. This makes it easily readable/verifiable and when
there's a need to change something, jump offsets etc do not need
to be replaced manually which can be very error prone. Instead,
a newly translated version via bpf_asm can simply replace the old
code. I have checked opcode diffs before/after and it's the very
same filter.

  [1] Documentation/networking/filter.txt

Fixes: 164d8c6665 ("net: ptp: do not reimplement PTP/BPF classifier")
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jiri Benc <jbenc@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 16:43:18 -04:00
Phoebe Buckheister e462ded699 mac802154: make csma/cca parameters per-wpan
Commit 9b2777d608 (ieee802154: add TX power control to wpan_phy)
and following erroneously added CSMA and CCA parameters for 802.15.4
devices as PHY parameters, while they are actually MAC parameters and
can differ for any two WPAN instances. Since it is now sensible to have
multiple WPAN devices with differing CSMA/CCA parameters, make these
parameters MAC parameters instead.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 16:25:51 -04:00
Phoebe Buckheister 336908f6d7 mac802154: allow only one WPAN to be up at any given time
All 802.15.4 PHY devices with drivers in tree can support only one WPAN
at any given time, yet the stack allows arbitrarily many WPAN devices to
be created and up at the same time. This cannot work with what the
hardware provides, and in the current implementation, provides an easy
DoS vector to any process on the system that may call socket() and
sendmsg().

Thus, allow only one WPAN per PHY to be up at once, just like mac80211
does for managed devices.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 16:25:51 -04:00
Daniel Borkmann 01d32f6e5a net: filter: minor: fix kdoc in __sk_run_filter
This minor patch fixes the following warning when doing
a `make htmldocs`:

  DOCPROC Documentation/DocBook/networking.xml
Warning(.../net/core/filter.c:135): No description found for parameter 'insn'
Warning(.../net/core/filter.c:135): Excess function parameter 'fentry' description in '__sk_run_filter'
  HTML    Documentation/DocBook/networking.html

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-01 15:25:33 -04:00
Jiri Kosina ad295b6d57 Merge branch 'for-3.15/hid-core-ll-transport-cleanup' into for-linus
Conflicts:
	drivers/hid/hid-ids.h
	drivers/hid/hid-sony.c
	drivers/hid/i2c-hid/i2c-hid.c
2014-04-01 19:05:09 +02:00
Jiri Kosina ee5f68e6c2 Merge branch 'for-3.15/ll-driver-new-callbacks' into for-linus 2014-04-01 18:56:24 +02:00
Linus Torvalds 9d919e8d5b Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue changes from Tejun Heo:
 "PREPARE_[DELAYED_]WORK() were used to change the work function of work
  items without fully reinitializing it; however, this makes workqueue
  consider the work item as a different one from before and allows the
  work item to start executing before the previous instance is finished
  which can lead to extremely subtle issues which are painful to debug.

  The interface has never been popular.  This pull request contains
  patches to remove existing usages and kill the interface.  As one of
  the changes was routed during the last devel cycle and another
  depended on a pending change in nvme, for-3.15 contains a couple merge
  commits.

  In addition, interfaces which were deprecated quite a while ago -
  __cancel_delayed_work() and WQ_NON_REENTRANT - are removed too"

* 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: remove deprecated WQ_NON_REENTRANT
  workqueue: Spelling s/instensive/intensive/
  workqueue: remove PREPARE_[DELAYED_]WORK()
  staging/fwserial: don't use PREPARE_WORK
  afs: don't use PREPARE_WORK
  nvme: don't use PREPARE_WORK
  usb: don't use PREPARE_DELAYED_WORK
  floppy: don't use PREPARE_[DELAYED_]WORK
  ps3-vuart: don't use PREPARE_WORK
  wireless/rt2x00: don't use PREPARE_WORK in rt2800usb.c
  workqueue: Remove deprecated __cancel_delayed_work()
2014-03-31 15:08:51 -07:00
Linus Torvalds 190f918660 Merge branch 'compat' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 compat wrapper rework from Heiko Carstens:
 "S390 compat system call wrapper simplification work.

  The intention of this work is to get rid of all hand written assembly
  compat system call wrappers on s390, which perform proper sign or zero
  extension, or pointer conversion of compat system call parameters.
  Instead all of this should be done with C code eg by using Al's
  COMPAT_SYSCALL_DEFINEx() macro.

  Therefore all common code and s390 specific compat system calls have
  been converted to the COMPAT_SYSCALL_DEFINEx() macro.

  In order to generate correct code all compat system calls may only
  have eg compat_ulong_t parameters, but no unsigned long parameters.
  Those patches which change parameter types from unsigned long to
  compat_ulong_t parameters are separate in this series, but shouldn't
  cause any harm.

  The only compat system calls which intentionally have 64 bit
  parameters (preadv64 and pwritev64) in support of the x86/32 ABI
  haven't been changed, but are now only available if an architecture
  defines __ARCH_WANT_COMPAT_SYS_PREADV64/PWRITEV64.

  System calls which do not have a compat variant but still need proper
  zero extension on s390, like eg "long sys_brk(unsigned long brk)" will
  get a proper wrapper function with the new s390 specific
  COMPAT_SYSCALL_WRAPx() macro:

     COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);

  which generates the following code (simplified):

     asmlinkage long sys_brk(unsigned long brk);
     asmlinkage long compat_sys_brk(long brk)
     {
         return sys_brk((u32)brk);
     }

  Given that the C file which contains all the COMPAT_SYSCALL_WRAP lines
  includes both linux/syscall.h and linux/compat.h, it will generate
  build errors, if the declaration of sys_brk() doesn't match, or if
  there exists a non-matching compat_sys_brk() declaration.

  In addition this will intentionally result in a link error if
  somewhere else a compat_sys_brk() function exists, which probably
  should have been used instead.  Two more BUILD_BUG_ONs make sure the
  size and type of each compat syscall parameter can be handled
  correctly with the s390 specific macros.

  I converted the compat system calls step by step to verify the
  generated code is correct and matches the previous code.  In fact it
  did not always match, however that was always a bug in the hand
  written asm code.

  In result we get less code, less bugs, and much more sanity checking"

* 'compat' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (44 commits)
  s390/compat: add copyright statement
  compat: include linux/unistd.h within linux/compat.h
  s390/compat: get rid of compat wrapper assembly code
  s390/compat: build error for large compat syscall args
  mm/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  kexec/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  net/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  ipc/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  fs/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types
  ipc/compat: convert to COMPAT_SYSCALL_DEFINE
  fs/compat: convert to COMPAT_SYSCALL_DEFINE
  security/compat: convert to COMPAT_SYSCALL_DEFINE
  mm/compat: convert to COMPAT_SYSCALL_DEFINE
  net/compat: convert to COMPAT_SYSCALL_DEFINE
  kernel/compat: convert to COMPAT_SYSCALL_DEFINE
  fs/compat: optional preadv64/pwrite64 compat system calls
  ipc/compat_sys_msgrcv: change msgtyp type from long to compat_long_t
  s390/compat: partial parameter conversion within syscall wrappers
  s390/compat: automatic zero, sign and pointer conversion of syscalls
  s390/compat: add sync_file_range and fallocate compat syscalls
  ...
2014-03-31 14:32:17 -07:00
Stanislav Kinsbursky 3064639423 nfsd: check passed socket's net matches NFSd superblock's one
There could be a case, when NFSd file system is mounted in network, different
to socket's one, like below:

"ip netns exec" creates new network and mount namespace, which duplicates NFSd
mount point, created in init_net context. And thus NFS server stop in nested
network context leads to RPCBIND client destruction in init_net.
Then, on NFSd start in nested network context, rpc.nfsd process creates socket
in nested net and passes it into "write_ports", which leads to RPCBIND sockets
creation in init_net context because of the same reason (NFSd monut point was
created in init_net context). An attempt to register passed socket in nested
net leads to panic, because no RPCBIND client present in nexted network
namespace.

This patch add check that passed socket's net matches NFSd superblock's one.
And returns -EINVAL error to user psace otherwise.

v2: Put socket on exit.

Reported-by: Weng Meiling <wengmeiling.weng@huawei.com>
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-03-31 16:58:16 -04:00
David S. Miller ce22bb6122 Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next
John W. Linville says:

====================
pull request: wireless-next 2014-03-31

Please accept this one last round of general wireless updates for
the 3.15 merge window!

For the Bluetooth bits, Gustavo says:

"Here follow another set of patches to 3.15. This is mostly a bug fix
pull request with the exception of one commit from Marcel which adds
tracking to the current configured LE scan type parameter."

Beyond that, notable bits include some final refactoring of rtl8180
and the addition of the rtl8187se driver, fixes for a number of
problems identified by Dan Carpenter and his static analysis tools,
and a handful of other bits here and there.

Please let me know if there are problems!
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:44:55 -04:00
Hannes Frederic Sowa 43a43b6040 ipv6: some ipv6 statistic counters failed to disable bh
After commit c15b1ccadb ("ipv6: move DAD and addrconf_verify
processing to workqueue") some counters are now updated in process context
and thus need to disable bh before doing so, otherwise deadlocks can
happen on 32-bit archs. Fabio Estevam noticed this while while mounting
a NFS volume on an ARM board.

As a compensation for missing this I looked after the other *_STATS_BH
and found three other calls which need updating:

1) icmp6_send: ip6_fragment -> icmpv6_send -> icmp6_send (error handling)
2) ip6_push_pending_frames: rawv6_sendmsg -> rawv6_push_pending_frames -> ...
   (only in case of icmp protocol with raw sockets in error handling)
3) ping6_v6_sendmsg (error handling)

Fixes: c15b1ccadb ("ipv6: move DAD and addrconf_verify processing to workqueue")
Reported-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:38:12 -04:00
Hannes Frederic Sowa 6dfac5c336 ipv6: strengthen fallback fragmentation id generation
First off, we don't need to check for non-NULL rt any more, as we are
guaranteed to always get a valid rt6_info. Drop the check.

In case we couldn't allocate an inet_peer for fragmentation information
we currently generate strictly incrementing fragmentation ids for all
destination. This is done to maximize the cycle and avoid collisions.

Those fragmentation ids are very predictable. At least we should try to
mix in the destination address.

While it should make no difference to simply use a PRNG at this point,
secure_ipv6_id ensures that we don't leak information from prandom,
so its internal state could be recoverable.

This fallback function should normally not get used thus this should
not affect performance at all. It is just meant as a safety net.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:33:38 -04:00
Eric Dumazet a50e233c50 net-gro: restore frag0 optimization
Main difference between napi_frags_skb() and napi_gro_receive() is that
the later is called while ethernet header was already pulled by the NIC
driver (eth_type_trans() was called before napi_gro_receive())

Jerry Chu in commit 299603e837 ("net-gro: Prepare GRO stack for the
upcoming tunneling support") tried to remove this difference by calling
eth_type_trans() from napi_frags_skb() instead of doing this later from
napi_frags_finish()

Goal was that napi_gro_complete() could call
ptype->callbacks.gro_complete(skb, 0)  (offset of first network header =
0)

Also, xxx_gro_receive() handlers all use off = skb_gro_offset(skb) to
point to their own header, for the current skb and ones held in gro_list

Problem is this cleanup work defeated the frag0 optimization:
It turns out the consecutive pskb_may_pull() calls are too expensive.

This patch brings back the frag0 stuff in napi_frags_skb().

As all skb have their mac header in skb head, we no longer need
skb_gro_mac_header()

Reported-by: Michal Schmidt <mschmidt@redhat.com>
Fixes: 299603e837 ("net-gro: Prepare GRO stack for the upcoming tunneling support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jerry Chu <hkchu@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:26:40 -04:00
Sasha Levin bf39b4247b rds: prevent dereference of a NULL device in rds_iw_laddr_check
Binding might result in a NULL device which is later dereferenced
without checking.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:25:52 -04:00
david decotigny 2d3b479df4 net-sysfs: expose number of carrier on/off changes
This allows to monitor carrier on/off transitions and detect link
flapping issues:
 - new /sys/class/net/X/carrier_changes
 - new rtnetlink IFLA_CARRIER_CHANGES (getlink)

Tested:
  - grep . /sys/class/net/*/carrier_changes
    + ip link set dev X down/up
    + plug/unplug cable
  - updated iproute2: prints IFLA_CARRIER_CHANGES
  - iproute2 20121211-2 (debian): unchanged behavior

Signed-off-by: David Decotigny <decot@googlers.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:24:52 -04:00
Wang Yufen 9c76a114bb ipv6: tcp_ipv6 policy route issue
The issue raises when adding policy route, specify a particular
NIC as oif, the policy route did not take effect. The reason is
that fl6.oif is not set and route map failed. From the
tcp_v6_send_response function, if the binding address is linklocal,
fl6.oif is set, but not for global address.

Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:16:17 -04:00
Wang Yufen 60ea37f7a5 ipv6: reuse rt6_need_strict
Move the whole rt6_need_strict as static inline into ip6_route.h,
so that it can be reused

Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:16:16 -04:00
Wang Yufen 4aa956d801 ipv6: tcp_ipv6 do some cleanup
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:16:16 -04:00
Vlad Yasevich f6367b4660 bridge: use is_skb_forwardable in forward path
Use existing function instead of trying to use our own.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:04:04 -04:00
Vlad Yasevich 1ee481fb4c net: Allow modules to use is_skb_forwardable
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 16:04:04 -04:00
John W. Linville 96da266e77 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2014-03-31 15:22:17 -04:00
Alexei Starovoitov bd4cf0ed33 net: filter: rework/optimize internal BPF interpreter's instruction set
This patch replaces/reworks the kernel-internal BPF interpreter with
an optimized BPF instruction set format that is modelled closer to
mimic native instruction sets and is designed to be JITed with one to
one mapping. Thus, the new interpreter is noticeably faster than the
current implementation of sk_run_filter(); mainly for two reasons:

1. Fall-through jumps:

  BPF jump instructions are forced to go either 'true' or 'false'
  branch which causes branch-miss penalty. The new BPF jump
  instructions have only one branch and fall-through otherwise,
  which fits the CPU branch predictor logic better. `perf stat`
  shows drastic difference for branch-misses between the old and
  new code.

2. Jump-threaded implementation of interpreter vs switch
   statement:

  Instead of single table-jump at the top of 'switch' statement,
  gcc will now generate multiple table-jump instructions, which
  helps CPU branch predictor logic.

Note that the verification of filters is still being done through
sk_chk_filter() in classical BPF format, so filters from user- or
kernel space are verified in the same way as we do now, and same
restrictions/constraints hold as well.

We reuse current BPF JIT compilers in a way that this upgrade would
even be fine as is, but nevertheless allows for a successive upgrade
of BPF JIT compilers to the new format.

The internal instruction set migration is being done after the
probing for JIT compilation, so in case JIT compilers are able to
create a native opcode image, we're going to use that, and in all
other cases we're doing a follow-up migration of the BPF program's
instruction set, so that it can be transparently run in the new
interpreter.

In short, the *internal* format extends BPF in the following way (more
details can be taken from the appended documentation):

  - Number of registers increase from 2 to 10
  - Register width increases from 32-bit to 64-bit
  - Conditional jt/jf targets replaced with jt/fall-through
  - Adds signed > and >= insns
  - 16 4-byte stack slots for register spill-fill replaced
    with up to 512 bytes of multi-use stack space
  - Introduction of bpf_call insn and register passing convention
    for zero overhead calls from/to other kernel functions
  - Adds arithmetic right shift and endianness conversion insns
  - Adds atomic_add insn
  - Old tax/txa insns are replaced with 'mov dst,src' insn

Performance of two BPF filters generated by libpcap resp. bpf_asm
was measured on x86_64, i386 and arm32 (other libpcap programs
have similar performance differences):

fprog #1 is taken from Documentation/networking/filter.txt:
tcpdump -i eth0 port 22 -dd

fprog #2 is taken from 'man tcpdump':
tcpdump -i eth0 'tcp port 22 and (((ip[2:2] - ((ip[0]&0xf)<<2)) -
   ((tcp[12]&0xf0)>>2)) != 0)' -dd

Raw performance data from BPF micro-benchmark: SK_RUN_FILTER on the
same SKB (cache-hit) or 10k SKBs (cache-miss); time in ns per call,
smaller is better:

--x86_64--
         fprog #1  fprog #1   fprog #2  fprog #2
         cache-hit cache-miss cache-hit cache-miss
old BPF      90       101        192       202
new BPF      31        71         47        97
old BPF jit  12        34         17        44
new BPF jit TBD

--i386--
         fprog #1  fprog #1   fprog #2  fprog #2
         cache-hit cache-miss cache-hit cache-miss
old BPF     107       136        227       252
new BPF      40       119         69       172

--arm32--
         fprog #1  fprog #1   fprog #2  fprog #2
         cache-hit cache-miss cache-hit cache-miss
old BPF     202       300        475       540
new BPF     180       270        330       470
old BPF jit  26       182         37       202
new BPF jit TBD

Thus, without changing any userland BPF filters, applications on
top of AF_PACKET (or other families) such as libpcap/tcpdump, cls_bpf
classifier, netfilter's xt_bpf, team driver's load-balancing mode,
and many more will have better interpreter filtering performance.

While we are replacing the internal BPF interpreter, we also need
to convert seccomp BPF in the same step to make use of the new
internal structure since it makes use of lower-level API details
without being further decoupled through higher-level calls like
sk_unattached_filter_{create,destroy}(), for example.

Just as for normal socket filtering, also seccomp BPF experiences
a time-to-verdict speedup:

05-sim-long_jumps.c of libseccomp was used as micro-benchmark:

  seccomp_rule_add_exact(ctx,...
  seccomp_rule_add_exact(ctx,...

  rc = seccomp_load(ctx);

  for (i = 0; i < 10000000; i++)
     syscall(199, 100);

'short filter' has 2 rules
'large filter' has 200 rules

'short filter' performance is slightly better on x86_64/i386/arm32
'large filter' is much faster on x86_64 and i386 and shows no
               difference on arm32

--x86_64-- short filter
old BPF: 2.7 sec
 39.12%  bench  libc-2.15.so       [.] syscall
  8.10%  bench  [kernel.kallsyms]  [k] sk_run_filter
  6.31%  bench  [kernel.kallsyms]  [k] system_call
  5.59%  bench  [kernel.kallsyms]  [k] trace_hardirqs_on_caller
  4.37%  bench  [kernel.kallsyms]  [k] trace_hardirqs_off_caller
  3.70%  bench  [kernel.kallsyms]  [k] __secure_computing
  3.67%  bench  [kernel.kallsyms]  [k] lock_is_held
  3.03%  bench  [kernel.kallsyms]  [k] seccomp_bpf_load
new BPF: 2.58 sec
 42.05%  bench  libc-2.15.so       [.] syscall
  6.91%  bench  [kernel.kallsyms]  [k] system_call
  6.25%  bench  [kernel.kallsyms]  [k] trace_hardirqs_on_caller
  6.07%  bench  [kernel.kallsyms]  [k] __secure_computing
  5.08%  bench  [kernel.kallsyms]  [k] sk_run_filter_int_seccomp

--arm32-- short filter
old BPF: 4.0 sec
 39.92%  bench  [kernel.kallsyms]  [k] vector_swi
 16.60%  bench  [kernel.kallsyms]  [k] sk_run_filter
 14.66%  bench  libc-2.17.so       [.] syscall
  5.42%  bench  [kernel.kallsyms]  [k] seccomp_bpf_load
  5.10%  bench  [kernel.kallsyms]  [k] __secure_computing
new BPF: 3.7 sec
 35.93%  bench  [kernel.kallsyms]  [k] vector_swi
 21.89%  bench  libc-2.17.so       [.] syscall
 13.45%  bench  [kernel.kallsyms]  [k] sk_run_filter_int_seccomp
  6.25%  bench  [kernel.kallsyms]  [k] __secure_computing
  3.96%  bench  [kernel.kallsyms]  [k] syscall_trace_exit

--x86_64-- large filter
old BPF: 8.6 seconds
    73.38%    bench  [kernel.kallsyms]  [k] sk_run_filter
    10.70%    bench  libc-2.15.so       [.] syscall
     5.09%    bench  [kernel.kallsyms]  [k] seccomp_bpf_load
     1.97%    bench  [kernel.kallsyms]  [k] system_call
new BPF: 5.7 seconds
    66.20%    bench  [kernel.kallsyms]  [k] sk_run_filter_int_seccomp
    16.75%    bench  libc-2.15.so       [.] syscall
     3.31%    bench  [kernel.kallsyms]  [k] system_call
     2.88%    bench  [kernel.kallsyms]  [k] __secure_computing

--i386-- large filter
old BPF: 5.4 sec
new BPF: 3.8 sec

--arm32-- large filter
old BPF: 13.5 sec
 73.88%  bench  [kernel.kallsyms]  [k] sk_run_filter
 10.29%  bench  [kernel.kallsyms]  [k] vector_swi
  6.46%  bench  libc-2.17.so       [.] syscall
  2.94%  bench  [kernel.kallsyms]  [k] seccomp_bpf_load
  1.19%  bench  [kernel.kallsyms]  [k] __secure_computing
  0.87%  bench  [kernel.kallsyms]  [k] sys_getuid
new BPF: 13.5 sec
 76.08%  bench  [kernel.kallsyms]  [k] sk_run_filter_int_seccomp
 10.98%  bench  [kernel.kallsyms]  [k] vector_swi
  5.87%  bench  libc-2.17.so       [.] syscall
  1.77%  bench  [kernel.kallsyms]  [k] __secure_computing
  0.93%  bench  [kernel.kallsyms]  [k] sys_getuid

BPF filters generated by seccomp are very branchy, so the new
internal BPF performance is better than the old one. Performance
gains will be even higher when BPF JIT is committed for the
new structure, which is planned in future work (as successive
JIT migrations).

BPF has also been stress-tested with trinity's BPF fuzzer.

Joint work with Daniel Borkmann.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Paul Moore <pmoore@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: linux-kernel@vger.kernel.org
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 00:45:09 -04:00
Daniel Borkmann 164d8c6665 net: ptp: do not reimplement PTP/BPF classifier
There are currently pch_gbe, cpts, and ixp4xx_eth drivers that open-code
and reimplement a BPF classifier for the PTP protocol. Since all of them
effectively do the very same thing and load the very same PTP/BPF filter,
we can just consolidate that code by introducing ptp_classify_raw() in
the time-stamping core framework which can be used in drivers.

As drivers get initialized after bootstrapping the core networking
subsystem, they can make use of ptp_insns wrapped through
ptp_classify_raw(), which allows to simplify and remove PTP classifier
setup code in drivers.

Joint work with Alexei Starovoitov.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Richard Cochran <richard.cochran@omicron.at>
Cc: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 00:45:09 -04:00
Daniel Borkmann e62d2df084 net: ptp: use sk_unattached_filter_create() for BPF
This patch migrates an open-coded sk_run_filter() implementation with
proper use of the BPF API, that is, sk_unattached_filter_create(). This
migration is needed, as we will be internally transforming the filter
to a different representation, and therefore needs to be decoupled.

It is okay to do so as skb_timestamping_init() is called during
initialization of the network stack in core initcall via sock_init().
This would effectively also allow for PTP filters to be jit compiled if
bpf_jit_enable is set.

For better readability, there are also some newlines introduced, also
ptp_classify.h is only in kernel space.

Joint work with Alexei Starovoitov.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Richard Cochran <richard.cochran@omicron.at>
Cc: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 00:45:09 -04:00
Daniel Borkmann fbc907f0b1 net: filter: move filter accounting to filter core
This patch basically does two things, i) removes the extern keyword
from the include/linux/filter.h file to be more consistent with the
rest of Joe's changes, and ii) moves filter accounting into the filter
core framework.

Filter accounting mainly done through sk_filter_{un,}charge() take
care of the case when sockets are being cloned through sk_clone_lock()
so that removal of the filter on one socket won't result in eviction
as it's still referenced by the other.

These functions actually belong to net/core/filter.c and not
include/net/sock.h as we want to keep all that in a central place.
It's also not in fast-path so uninlining them is fine and even allows
us to get rd of sk_filter_release_rcu()'s EXPORT_SYMBOL and a forward
declaration.

Joint work with Alexei Starovoitov.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 00:45:09 -04:00
Daniel Borkmann a3ea269b8b net: filter: keep original BPF program around
In order to open up the possibility to internally transform a BPF program
into an alternative and possibly non-trivial reversible representation, we
need to keep the original BPF program around, so that it can be passed back
to user space w/o the need of a complex decoder.

The reason for that use case resides in commit a8fc927780 ("sk-filter:
Add ability to get socket filter program (v2)"), that is, the ability
to retrieve the currently attached BPF filter from a given socket used
mainly by the checkpoint-restore project, for example.

Therefore, we add two helpers sk_{store,release}_orig_filter for taking
care of that. In the sk_unattached_filter_create() case, there's no such
possibility/requirement to retrieve a loaded BPF program. Therefore, we
can spare us the work in that case.

This approach will simplify and slightly speed up both, sk_get_filter()
and sock_diag_put_filterinfo() handlers as we won't need to successively
decode filters anymore through sk_decode_filter(). As we still need
sk_decode_filter() later on, we're keeping it around.

Joint work with Alexei Starovoitov.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 00:45:09 -04:00
Daniel Borkmann f8bbbfc3b9 net: filter: add jited flag to indicate jit compiled filters
This patch adds a jited flag into sk_filter struct in order to indicate
whether a filter is currently jited or not. The size of sk_filter is
not being expanded as the 32 bit 'len' member allows upper bits to be
reused since a filter can currently only grow as large as BPF_MAXINSNS.

Therefore, there's enough room also for other in future needed flags to
reuse 'len' field if necessary. The jited flag also allows for having
alternative interpreter functions running as currently, we can only
detect jit compiled filters by testing fp->bpf_func to not equal the
address of sk_run_filter().

Joint work with Alexei Starovoitov.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-31 00:45:08 -04:00
Kinglong Mee 642aab58db SUNRPC: Clear xpt_bc_xprt if xs_setup_bc_tcp failed
Don't move the assign of args->bc_xprt->xpt_bc_xprt out of xs_setup_bc_tcp,
because rpc_ping (which is in rpc_create) will using it.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-03-30 10:47:37 -04:00
Kinglong Mee d531c008d7 NFSD/SUNRPC: Check rpc_xprt out of xs_setup_bc_tcp
Besides checking rpc_xprt out of xs_setup_bc_tcp,
increase it's reference (it's important).

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-03-30 10:47:36 -04:00
Kinglong Mee 83ddfebdd2 SUNRPC: New helper for creating client with rpc_xprt
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-03-30 10:47:36 -04:00
Kinglong Mee 47f72efa8f NFSD: Free backchannel xprt in bc_destroy
Backchannel xprt isn't freed right now.
Free it in bc_destroy, and put the reference of THIS_MODULE.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-03-30 10:47:35 -04:00
David S. Miller 64c27237a0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/marvell/mvneta.c

The mvneta.c conflict is a case of overlapping changes,
a conversion to devm_ioremap_resource() vs. a conversion
to netdev_alloc_pcpu_stats.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-29 18:48:54 -04:00
Wang Yufen 437de07ced ipv6: fix checkpatch errors of "foo*" and "foo * bar"
ERROR: "(foo*)" should be "(foo *)"
ERROR: "foo * bar" should be "foo *bar"

Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-29 18:15:52 -04:00
Wang Yufen 49e253e399 ipv6: fix checkpatch errors of brace and trailing statements
ERROR: open brace '{' following enum go on the same line
ERROR: open brace '{' following struct go on the same line
ERROR: trailing statements should be on next line

Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-29 18:15:52 -04:00
Wang Yufen 8db46f1d4c ipv6: fix checkpatch errors comments and space
WARNING: please, no space before tabs
WARNING: please, no spaces at the start of a line
ERROR: spaces required around that ':' (ctx:VxW)
ERROR: spaces required around that '>' (ctx:VxV)
ERROR: spaces required around that '>=' (ctx:VxV)

Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-29 18:15:52 -04:00
Eric W. Biederman 5efeac44cf netpoll: Respect NETIF_F_LLTX
Stop taking the transmit lock when a network device has specified
NETIF_F_LLTX.

If no locks needed to trasnmit a packet this is the ideal scenario for
netpoll as all packets can be trasnmitted immediately.

Even if some locks are needed in ndo_start_xmit skipping any unnecessary
serialization is desirable for netpoll as it makes it more likely a
debugging packet may be trasnmitted immediately instead of being
deferred until later.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-29 17:58:37 -04:00