GitHub/LineageOS/android_kernel_samsung_universal7580.git
12 years agobe2net: fix a possible events_get() race on BE2
Sathya Perla [Fri, 23 Nov 2012 00:27:18 +0000 (00:27 +0000)]
be2net: fix a possible events_get() race on BE2

On BE2 chip, an interrupt being raised even when EQ is in un-armed state has
been observed a few times.  This is not expected and has never been
observed on BE3/Lancer chips.

As a consequence, be_msix()::events_get() and be_poll()::events_get()
can race and notify an EQ wrongly causing a CEV UE. The other possible
side-effect would be traffic stalling because after notifying EQ,
napi_schedule() is ignored as NAPI is already running.

This patch fixes this issue by counting events only in be_poll().

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agotun: change tun_get_iff() prototype.
Rami Rosen [Fri, 23 Nov 2012 03:58:10 +0000 (03:58 +0000)]
tun: change tun_get_iff() prototype.

This patch changes tun_get_iff() prototype to return void as it never fails.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosmsc95xx: refactor entering suspend modes
Steve Glendinning [Thu, 22 Nov 2012 08:05:25 +0000 (08:05 +0000)]
smsc95xx: refactor entering suspend modes

This patch splits out the logic for entering suspend modes
to separate functions, to reduce the complexity of the
smsc95xx_suspend function.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosmsc95xx: support PHY wakeup source
Steve Glendinning [Thu, 22 Nov 2012 08:05:24 +0000 (08:05 +0000)]
smsc95xx: support PHY wakeup source

This patch enables LAN9500 family devices to wake from suspend
on either link up or link down events

It also adds _nopm versions of mdio access functions, so we can
safely call them from suspend and resume functions

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosmsc95xx: detect chip revision specific features
Steve Glendinning [Thu, 22 Nov 2012 08:05:23 +0000 (08:05 +0000)]
smsc95xx: detect chip revision specific features

Instead of storing the number of wake-up frame filter registers
in the pdata structure, this patch changes the driver to detect
the type of device we have and store its available features.

The new two features will be used in future patches.

This patch is intended to have no change in behaviour.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosmsc95xx: fix error checking of usbnet_resume
Steve Glendinning [Thu, 22 Nov 2012 08:05:22 +0000 (08:05 +0000)]
smsc95xx: fix error checking of usbnet_resume

without this patch the two lines below won't ever execute

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agotcp: remove dead prototype for tcp_v4_get_peer()
Neal Cardwell [Thu, 22 Nov 2012 17:48:59 +0000 (17:48 +0000)]
tcp: remove dead prototype for tcp_v4_get_peer()

This function no longer exists.

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'tipc_net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg...
David S. Miller [Fri, 23 Nov 2012 19:08:43 +0000 (14:08 -0500)]
Merge branch 'tipc_net-next' of git://git./linux/kernel/git/paulg/linux

Paul Gortmaker says:

====================
The most interesting thing here, at least from a user perspective,
is the broadcast link fix -- where there was a corner case where
two endpoints could get in a state where they disagree on where
to start Rx and ack of broadcast packets.

There is also the poll/wait changes which could also impact
end users for certain use cases - the fixes there also better
align tipc with the rest of the networking code.

The rest largely falls into routine cleanup category, by getting
rid of some unused routines, some Kconfig clutter, etc.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoipv6: adapt connect for repair move
Andrey Vagin [Thu, 22 Nov 2012 01:13:58 +0000 (01:13 +0000)]
ipv6: adapt connect for repair move

This is work the same as for ipv4.

All other hacks about tcp repair are in common code for ipv4 and ipv6,
so this patch is enough for repairing ipv6 connections.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec...
David S. Miller [Thu, 22 Nov 2012 20:25:55 +0000 (15:25 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/klassert/ipsec-next

Steffen Klassert says:

====================
This pull request is intended for net-next and contains the following changes:

1) Remove a redundant check when initializing the xfrm replay functions,
   from Ulrich Weber.
2) Use a faster per-cpu helper when allocating ipcomt transforms,
   from Shan Wei.
3) Use a static gc threshold value for ipv6, simmilar to what we do
   for ipv4 now.
4) Remove a commented out function call.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agotipc: delete TIPC_ADVANCED Kconfig variable
Paul Gortmaker [Thu, 22 Nov 2012 01:11:54 +0000 (20:11 -0500)]
tipc: delete TIPC_ADVANCED Kconfig variable

There used to be a time when TIPC had lots of Kconfig knobs the
end user could alter, but they have all been made automatic or
obsolete, with the exception of CONFIG_TIPC_PORTS.  This
previously existing set of options was all hidden under the
TIPC_ADVANCED setting, which does not exist in any code, but
only in Kconfig scope.

Having this now, just to hide the one remaining "advanced"
option no longer makes sense.  Remove it.  Also get rid of the
ifdeffery in the TIPC code that allowed for TIPC_PORTS to be
possibly undefined.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agotipc: eliminate an unnecessary cast of node variable
Ying Xue [Fri, 16 Nov 2012 05:51:32 +0000 (13:51 +0800)]
tipc: eliminate an unnecessary cast of node variable

As the variable:node is currently defined to u32 type, it is
unnecessary to cast its type to u32 again when using it.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agotipc: introduce message to synchronize broadcast link
Jon Maloy [Fri, 16 Nov 2012 05:51:31 +0000 (13:51 +0800)]
tipc: introduce message to synchronize broadcast link

Upon establishing a first link between two nodes, there is
currently a risk that the two endpoints will disagree on exactly
which sequence number reception and acknowleding of broadcast
packets should start.

The following scenarios may happen:

1: Node A sends an ACTIVATE message to B, telling it to start acking
   packets from sequence number N.
2: Node A sends out broadcast N, but does not expect an acknowledge
   from B, since B is not yet in its broadcast receiver's list.
3: Node A receives ACK for N from all nodes except B, and releases
   packet N.
4: Node B receives the ACTIVATE, activates its link endpoint, and
   stores the value N as sequence number of first expected packet.
5: Node B sends a NAME_DISTR message to A.
6: Node A receives the NAME_DISTR message, and activates its endpoint.
   At this moment B is added to A's broadcast receiver's set.
   Node A also sets sequence number 0 as the first broadcast packet
   to be received from B.
7: Node A sends broadcast N+1.
8: B receives N+1, determines there is a gap in the sequence, since
   it is expecting N, and sends a NACK for N back to A.
9: Node A has already released N, so no retransmission is possible.
   The broadcast link in direction A->B is stale.

In addition to, or instead of, 7-9 above, the following may happen:

10: Node B sends broadcast M > 0 to A.
11: Node A receives M, falsely decides there must be a gap, since
    it is expecting packet 0, and asks for retransmission of packets
    [0,M-1].
12: Node B has already released these packets, so the broadcast
    link is stale in direction B->A.

We solve this problem by introducing a new unicast message type,
BCAST_PROTOCOL/STATE, to convey the sequence number of the next
sent broadcast packet to the other endpoint, at exactly the moment
that endpoint is added to the own node's broadcast receivers list,
and before any other unicast messages are permitted to be sent.

Furthermore, we don't allow any node to start receiving and
processing broadcast packets until this new synchronization
message has been received.

To maintain backwards compatibility, we still open up for
broadcast reception if we receive a NAME_DISTR message without
any preceding broadcast sync message. In this case, we must
assume that the other end has an older code version, and will
never send out the new synchronization message. Hence, for mixed
old and new nodes, the issue arising in 7-12 of the above may
happen with the same probability as before.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agotipc: rename supported flag to recv_permitted
Ying Xue [Fri, 16 Nov 2012 05:51:30 +0000 (13:51 +0800)]
tipc: rename supported flag to recv_permitted

Rename the "supported" flag in bclink structure to "recv_permitted"
to better reflect what it is used for. When this flag is set for a
given node, we are permitted to receive and acknowledge broadcast
messages from that node.  Convert it to a bool at the same time,
since it is not used to store any numerical values.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agotipc: remove supportable flag from bclink structure
Ying Xue [Fri, 16 Nov 2012 05:51:29 +0000 (13:51 +0800)]
tipc: remove supportable flag from bclink structure

The "supportable" flag in bclink structure is a compatibility flag
indicating whether a peer node is capable of receiving TIPC broadcast
messages. However, all TIPC versions since tipc-1.5, and after the
inclusion in the upstream Linux kernel in 2006, support this capability.
It is highly unlikely that anybody is still using such an old
version of TIPC, let alone that they want to mix it with TIPC-2.0
nodes. Therefore, we now remove the "supportable" flag.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agoigb: Do not parse past IP header on fragments beyond the first
Alexander Duyck [Tue, 13 Nov 2012 01:13:38 +0000 (01:13 +0000)]
igb: Do not parse past IP header on fragments beyond the first

This change makes it so that only the first fragment in a series of fragments
will have the L4 header pulled.  Previously we were always pulling the L4
header as well and in the case of UDP this can harm performance since only the
first fragment will have the header, the rest just contain data which should
be left in the paged portion of the packet.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoigb: No longer rely on APME to determine WoL settings
Matthew Vick [Fri, 9 Nov 2012 05:49:54 +0000 (05:49 +0000)]
igb: No longer rely on APME to determine WoL settings

Historically, we've been using the APME bit to determine whether a device
supports wake on a given port or not. However, this bit specifies the
default wake setting, rather than the wake support. Change the behavior so
that we use a flag to keep the capabilities separate from the enablement
while meeting customer requirements.

Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoigb: Update PTP Rx filters
Matthew Vick [Thu, 8 Nov 2012 08:38:57 +0000 (08:38 +0000)]
igb: Update PTP Rx filters

Update the filters to be more consistent with what the driver wants to do.
For example, for devices that timestamp all packets, report that the filter
is set for timestamping all packets.

Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoixgbe: fdb: only allow NUD_PERM fdb entries
John Fastabend [Thu, 1 Nov 2012 05:00:44 +0000 (05:00 +0000)]
ixgbe: fdb: only allow NUD_PERM fdb entries

There was a bitwise operation error in the fdb_add block
that was only allowing FDB types that were not permanent.

This was the opposite of the intent because the hardware
never ages out address these are the _only_ type of addrs
that should be allowed.

This was missed because until recently iproute2 did not
set any bit for this by default. And our test code to
manage FDB entries on embedded devices similarly did not
set these bits.

I am going to chalk this up as a bug and fix it now.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoixgbe: ethtool correctly identify autoneg setting
Jacob Keller [Wed, 24 Oct 2012 07:26:02 +0000 (07:26 +0000)]
ixgbe: ethtool correctly identify autoneg setting

This patch enables ethtool to correctly identify flow control (pause
frame) auto negotiation, as well as disallow enabling it when it is not
supported. The ixgbe_device_supports_autoneg_fc function is exported and
used for this purpose.

There is also one minor cleanup of the device_supports_autoneg_fc by
removing an unnecessary return statement.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoixgbe: remove needless queuing for L4 ptp packets
Jacob Keller [Wed, 24 Oct 2012 02:31:47 +0000 (02:31 +0000)]
ixgbe: remove needless queuing for L4 ptp packets

This patch removes the queuing that was previously done for L4 packets
as it is not needed. The filter does not provide functionality, and it
is possible that queue setup here could trample settings done else-where
in the driver. (for example it may use a queue which isn't setup.)
Setting of the queue is not required for hardware timestamping and could
have inadverdent side effects.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoixgbe: use ETQF filter name instead of magic number
Jacob Keller [Tue, 23 Oct 2012 08:09:21 +0000 (08:09 +0000)]
ixgbe: use ETQF filter name instead of magic number

This patch removes a magic number that was used for the ETQF used for
filtering L2 ptp packets and replaces it with the supplied define that
previously existed. The intent is to clarify that this filter is already
set aside for L2 1588 work.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoixgbe: convert to use simple_open()
Wei Yongjun [Thu, 18 Oct 2012 06:34:08 +0000 (06:34 +0000)]
ixgbe: convert to use simple_open()

This removes an open coded simple_open() function and
replaces file operations references to the function
with simple_open() instead.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agoixgbe: Reformat output of ixgbe_dump
Josh Hay [Wed, 26 Sep 2012 05:59:41 +0000 (05:59 +0000)]
ixgbe: Reformat output of ixgbe_dump

Reformats the output of the Tx/Rx descriptor dumps to more
appropriately align the output of the ixgbe_dump and improve readability.
Prevents empty Tx descriptors from being displayed to decrease the size
of the dump and make it more manageable.

Signed-off-by: Josh Hay <joshua.a.hay@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
12 years agotipc: remove the bearer congestion mechanism
Ying Xue [Thu, 15 Nov 2012 03:34:45 +0000 (11:34 +0800)]
tipc: remove the bearer congestion mechanism

Currently at the TIPC bearer layer there is the following congestion
mechanism:

Once sending packets has failed via that bearer, the bearer will be
flagged as being in congested state at once. During bearer congestion,
all packets arriving at link will be queued on the link's outgoing
buffer.  When we detect that the state of bearer congestion has
relaxed (e.g. some packets are received from the bearer) we will try
our best to push all packets in the link's outgoing buffer until the
buffer is empty, or until the bearer is congested again.

However, in fact the TIPC bearer never receives any feedback from the
device layer whether a send was successful or not, so it must always
assume it was successful. Therefore, the bearer congestion mechanism
as it exists currently is of no value.

But the bearer blocking state is still useful for us. For example,
when the physical media goes down/up, we need to change the state of
the links bound to the bearer.  So the code maintaing the state
information is not removed.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agotipc: wake up all waiting threads at socket shutdown
Ying Xue [Mon, 29 Oct 2012 13:38:15 +0000 (09:38 -0400)]
tipc: wake up all waiting threads at socket shutdown

When a socket is shut down, we should wake up all thread sleeping on
it, instead of just one of them. Otherwise, when several threads are
polling the same socket, and one of them does shutdown(), the
remaining threads may end up sleeping forever.

Also, to align socket usage with common practice in other stacks, we
use one of the common socket callback handlers, sk_state_change(),
to wake up pending users. This is similar to the usage in e.g.
inet_shutdown(). [net/ipv4/af_inet.c].

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agoMerge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge
David S. Miller [Wed, 21 Nov 2012 20:30:36 +0000 (15:30 -0500)]
Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Included changes:
- Increase batman-adv version
- Bridge Loop Avoidance: compute checksum (using crc32) on skb fragments instead
  of linearising it
- sort the sysfs documentation
- some other minor cleanups

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agotipc: return POLLOUT for sockets in an unconnected state
Erik Hugne [Tue, 16 Oct 2012 14:47:06 +0000 (16:47 +0200)]
tipc: return POLLOUT for sockets in an unconnected state

If an implied connect is attempted on a nonblocking STREAM/SEQPACKET
socket during link congestion, the connect message will be discarded
and sendmsg will return EAGAIN. This is normal behavior, and the
application is expected to poll the socket until POLLOUT is set,
after which the connection attempt can be retried.
However, the POLLOUT flag is never set for unconnected sockets and
poll() always returns a zero mask. The application is then left without
a trigger for when it can make another attempt at sending the message.

The solution is to check if we're polling on an unconnected socket
and set the POLLOUT flag if the TIPC port owned by this socket
is not congested. The TIPC ports waiting on a specific link will be
marked as 'not congested' when the link congestion have abated.

Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agotipc: fix race/inefficiencies in poll/wait behaviour
Ying Xue [Tue, 21 Aug 2012 03:16:57 +0000 (11:16 +0800)]
tipc: fix race/inefficiencies in poll/wait behaviour

When an application blocks at poll/select on a TIPC socket
while requesting a specific event mask, both the filter_rcv() and
wakeupdispatch() case will wake it up unconditionally whenever
the state changes (i.e an incoming message arrives, or congestion
has subsided).  No mask is used.

To avoid this, we populate sk->sk_data_ready and sk->sk_write_space
with tipc_data_ready and tipc_write_space respectively, which makes
tipc more in alignment with the rest of the networking code.  These
pass the exact set of possible events to the waker in fs/select.c
hence avoiding waking up blocked processes unnecessarily.

In doing so, we uncover another issue -- that there needs to be a
memory barrier in these poll/receive callbacks, otherwise we are
subject to the the same race as documented above wq_has_sleeper()
[in commit a57de0b4 "net: adding memory barrier to the poll and
receive callbacks"].  So we need to replace poll_wait() with
sock_poll_wait() and use rcu protection for the sk->sk_wq pointer
in these two new functions.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
12 years agobatman-adv: Use packing of 2 for all headers before an ethernet header
Sven Eckelmann [Mon, 5 Nov 2012 20:25:27 +0000 (21:25 +0100)]
batman-adv: Use packing of 2 for all headers before an ethernet header

All packet headers in front of an ethernet header have to be completely
divisible by 2 but not by 4 to make the payload after the ethernet header again
4 bytes boundary aligned.

A packing of 2 is necessary to avoid extra padding at the end of the struct
caused by a structure member which is larger than two bytes. Otherwise the
structure would not fulfill the previously mentioned rule to avoid the
misalignment of the payload after the ethernet header. It may also lead to
leakage of information when the padding it not initialized before sending.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: Start new development cycle
Sven Eckelmann [Mon, 29 Oct 2012 16:15:08 +0000 (17:15 +0100)]
batman-adv: Start new development cycle

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: Fix broadcast duplist for fragmentation
Simon Wunderlich [Thu, 18 Oct 2012 11:47:42 +0000 (13:47 +0200)]
batman-adv: Fix broadcast duplist for fragmentation

If the skb is fragmented, the checksum must be computed on the
individual fragments, just using skb->data may fail on fragmented
data. Instead of doing linearizing the packet, use the new
batadv_crc32 to do that more efficiently- it should not hurt
replacing the old crc16 by the new crc32.

Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: Add function to calculate crc32c for the skb payload
Sven Eckelmann [Wed, 17 Oct 2012 19:10:39 +0000 (21:10 +0200)]
batman-adv: Add function to calculate crc32c for the skb payload

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: sysfs documentation should keep alphabetical order
Marek Lindner [Sun, 21 Oct 2012 09:02:25 +0000 (17:02 +0800)]
batman-adv: sysfs documentation should keep alphabetical order

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: Add wrapper to look up neighbor and send skb
Martin Hundebøll [Tue, 16 Oct 2012 14:13:48 +0000 (16:13 +0200)]
batman-adv: Add wrapper to look up neighbor and send skb

By adding batadv_send_skb_to_orig() in send.c, we can remove duplicate
code that looks up the next hop and then calls batadv_send_skb_packet().

Furthermore, this prepares the upcoming new implementation of
fragmentation, which requires the next hop to route packets.

Please note that this doesn't entirely remove the next-hop lookup in
routing.c and unicast.c, since it is used by the current fragmentation
code.

Also note that the next-hop info is removed from debug messages in
translation-table.c, since it is looked up elsewhere.

Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: support array of debugfs general attributes
Antonio Quartulli [Tue, 16 Oct 2012 08:04:39 +0000 (10:04 +0200)]
batman-adv: support array of debugfs general attributes

This patch adds support for an array of debugfs general (not soft_iface
specific) attributes. With this change it will be possible to add more general
attributes by simply appending them to the array without touching the rest of
the code.

Reported-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
12 years agobatman-adv: fix bla compare function
Simon Wunderlich [Mon, 15 Oct 2012 20:38:04 +0000 (22:38 +0200)]
batman-adv: fix bla compare function

The address and the VLAN VID may not be packed in the respective
structs. Fix this by comparing the elements individually.

Reported-by: Marek Lindner <lindner_marek@yahoo.de>
Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agobatman-adv: Mark best gateway in transtable_global debugfs
Sven Eckelmann [Sun, 7 Oct 2012 11:34:15 +0000 (13:34 +0200)]
batman-adv: Mark best gateway in transtable_global debugfs

The transtable_global debug file can show multiple entries for a single client
when multiple gateways exist. The chosen gateway isn't marked in the list and
therefore the user cannot easily debug the situation when there is a problem
with the currently used gateway.

The best gateway is now marked with "*" and secondary gateways are marked with
"+".

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
12 years agosctp: send abort chunk when max_retrans exceeded
Neil Horman [Tue, 20 Nov 2012 10:14:30 +0000 (10:14 +0000)]
sctp: send abort chunk when max_retrans exceeded

In the event that an association exceeds its max_retrans attempts, we should
send an ABORT chunk indicating that we are closing the assocation as a result.
Because of the nature of the error, its unlikely to be received, but its a nice
clean way to close the association if it does make it through, and it will give
anyone watching via tcpdump a clue as to what happened.

Change notes:
v2)
* Removed erroneous changes from sctp_make_violation_parmlen

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Vlad Yasevich <vyasevich@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: linux-sctp@vger.kernel.org
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Remove redundant null check before kfree in dev.c
Sachin Kamat [Tue, 20 Nov 2012 00:57:04 +0000 (00:57 +0000)]
net: Remove redundant null check before kfree in dev.c

kfree on a null pointer is a no-op.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agocaif: Remove redundant null check before kfree in cfctrl.c
Sachin Kamat [Tue, 20 Nov 2012 00:53:58 +0000 (00:53 +0000)]
caif: Remove redundant null check before kfree in cfctrl.c

kfree on a null pointer is a no-op.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agobnx2x: Remove duplicate inclusion of bnx2x_hsi.h
Sachin Kamat [Mon, 19 Nov 2012 01:52:11 +0000 (01:52 +0000)]
bnx2x: Remove duplicate inclusion of bnx2x_hsi.h

bnx2x_hsi.h was included twice.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosit: allow to configure 6rd tunnels via netlink
Nicolas Dichtel [Mon, 19 Nov 2012 22:41:45 +0000 (22:41 +0000)]
sit: allow to configure 6rd tunnels via netlink

This patch add the support of 6RD tunnels management via netlink.
Note that netdev_state_change() is now called when 6RD parameters are updated.

6RD parameters are updated only if there is at least one 6RD attribute.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoadd DOVE extensions for VXLAN
David Stevens [Tue, 20 Nov 2012 02:50:14 +0000 (02:50 +0000)]
add DOVE extensions for VXLAN

This patch provides extensions to VXLAN for supporting Distributed
Overlay Virtual Ethernet (DOVE) networks. The patch includes:

+ a dove flag per VXLAN device to enable DOVE extensions
+ ARP reduction, whereby a bridge-connected VXLAN tunnel endpoint
answers ARP requests from the local bridge on behalf of
remote DOVE clients
+ route short-circuiting (aka L3 switching). Known destination IP
addresses use the corresponding destination MAC address for
switching rather than going to a (possibly remote) router first.
+ netlink notification messages for forwarding table and L3 switching
misses

Changes since v2
- combined bools into "u32 flags"
- replaced loop with !is_zero_ether_addr()

Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Remove bogus dependencies on INET
Ben Hutchings [Fri, 16 Nov 2012 12:47:39 +0000 (12:47 +0000)]
net: Remove bogus dependencies on INET

Various drivers depend on INET because they used to select INET_LRO,
but they have all been converted to use GRO which has no such
dependency.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoehea: Remove remnants of LRO support
Ben Hutchings [Fri, 16 Nov 2012 12:46:43 +0000 (12:46 +0000)]
ehea: Remove remnants of LRO support

Commit 2cb1deb56f5bf413da83491e0cb5a0474393c8ef ('ehea: Remove LRO
support') left behind the Kconfig depends/select and feature flag.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agomlx4_en: Remove remnants of LRO support
Ben Hutchings [Fri, 16 Nov 2012 12:44:56 +0000 (12:44 +0000)]
mlx4_en: Remove remnants of LRO support

Commit fa37a9586f92051de03a13e55e5ec3880bb6783e ('mlx4_en: Moving to
work with GRO') left behind the Kconfig depends/select, some dead
code and comments referring to LRO.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: remove unnecessary wireless includes
Johannes Berg [Fri, 16 Nov 2012 10:59:21 +0000 (10:59 +0000)]
net: remove unnecessary wireless includes

The wireless and wext includes in net-sysfs.c aren't
needed, so remove them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet/ethernet: remove useless is_valid_ether_addr from drivers ndo_open
Joachim Eastwood [Fri, 16 Nov 2012 04:47:15 +0000 (04:47 +0000)]
net/ethernet: remove useless is_valid_ether_addr from drivers ndo_open

If ndo_validate_addr is set to the generic eth_validate_addr
function there is no point in calling is_valid_ether_addr
from driver ndo_open if ndo_open is not used elsewhere in
the driver.

With this change is_valid_ether_addr will be called from the
generic eth_validate_addr function. So there should be no change
in the actual behavior.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: rds: use this_cpu_* per-cpu helper
Shan Wei [Mon, 12 Nov 2012 15:52:01 +0000 (15:52 +0000)]
net: rds: use this_cpu_* per-cpu helper

Signed-off-by: Shan Wei <davidshan@tencent.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: core: use this_cpu_ptr per-cpu helper
Shan Wei [Mon, 12 Nov 2012 15:51:54 +0000 (15:51 +0000)]
net: core: use this_cpu_ptr per-cpu helper

flush_tasklet is a struct, not a pointer in percpu var.
so use this_cpu_ptr to get the member pointer.

Signed-off-by: Shan Wei <davidshan@tencent.com>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agovhost: Remove duplicate inclusion of linux/vhost.h
Sachin Kamat [Mon, 19 Nov 2012 01:28:28 +0000 (01:28 +0000)]
vhost: Remove duplicate inclusion of linux/vhost.h

linux/vhost.h was included twice.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet/macb: move to circ_buf macros and fix initial condition
Nicolas Ferre [Mon, 19 Nov 2012 06:00:21 +0000 (06:00 +0000)]
net/macb: move to circ_buf macros and fix initial condition

Move to circular buffers management macro and correct an error
with circular buffer initial condition.

Without this patch, the macb_tx_ring_avail() function was
not reporting the proper ring availability at startup:
macb macb: eth0: BUG! Tx Ring full when queue awake!
macb macb: eth0: tx_head = 0, tx_tail = 0
And hanginig forever...

I remove the macb_tx_ring_avail() function and use the
proven macros from circ_buf.h. CIRC_CNT() is used in the
"consumer" part of the driver: macb_tx_interrupt() to match
advice from Documentation/circular-buffers.txt.

Reported-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonetfilter: Remove the spurious \ in __ip_vs_lblc_init
Eric W. Biederman [Mon, 19 Nov 2012 05:26:30 +0000 (05:26 +0000)]
netfilter: Remove the spurious \ in __ip_vs_lblc_init

In (464dc801c76a net: Don't export sysctls to unprivileged users)
I typoed and introduced a spurious backslash.  Delete it.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqeth: Remove BUG_ONs
Stefan Raspl [Mon, 19 Nov 2012 02:46:50 +0000 (02:46 +0000)]
qeth: Remove BUG_ONs

Remove BUG_ONs or convert to WARN_ON_ONCE/WARN_ONs since a failure within a
networking device driver is no reason to shut down the entire machine.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqeth: Consolidate tracing of card features
Stefan Raspl [Mon, 19 Nov 2012 02:46:49 +0000 (02:46 +0000)]
qeth: Consolidate tracing of card features

Trace all supported and enabled card features to s390dbf.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqeth: Clarify card type naming for virtual NICs
Stefan Raspl [Mon, 19 Nov 2012 02:46:48 +0000 (02:46 +0000)]
qeth: Clarify card type naming for virtual NICs

So far, virtual NICs whether attached to a VSWITCH or a guest LAN were always
displayed as guest LANs in the device driver attributes and messages, while
in fact it is a virtual NIC.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoclaw: remove BUG_ONs
Ursula Braun [Mon, 19 Nov 2012 02:46:47 +0000 (02:46 +0000)]
claw: remove BUG_ONs

Remove BUG_ON's in claw driver, since the checked error conditions
are null pointer accesses.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoctcm: remove BUG_ONs
Ursula Braun [Mon, 19 Nov 2012 02:46:46 +0000 (02:46 +0000)]
ctcm: remove BUG_ONs

Remove BUG_ON's in ctcm driver, since the checked error conditions
are null pointer accesses.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqeth: Remove unused variable
Stefan Raspl [Mon, 19 Nov 2012 02:46:45 +0000 (02:46 +0000)]
qeth: Remove unused variable

Eliminate a variable that is never modified.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root to control tun and tap devices
Eric W. Biederman [Sun, 18 Nov 2012 21:34:11 +0000 (21:34 +0000)]
net: Allow userns root to control tun and tap devices

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) calls to
ns_capable(net->user_ns,CAP_NET_ADMIN) calls.

Allow setting of the tun iff flags.
Allow creating of tun devices.
Allow adding a new queue to a tun device.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Make CAP_NET_BIND_SERVICE per user namespace
Eric W. Biederman [Fri, 16 Nov 2012 03:03:12 +0000 (03:03 +0000)]
net: Make CAP_NET_BIND_SERVICE per user namespace

Allow privileged users in any user namespace to bind to
privileged sockets in network namespaces they control.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Enable a userns root rtnl calls that are safe for unprivilged users
Eric W. Biederman [Fri, 16 Nov 2012 03:03:11 +0000 (03:03 +0000)]
net: Enable a userns root rtnl calls that are safe for unprivilged users

- Only allow moving network devices to network namespaces you have
  CAP_NET_ADMIN privileges over.

- Enable creating/deleting/modifying interfaces
- Enable adding/deleting addresses
- Enable adding/setting/deleting neighbour entries
- Enable adding/removing routes
- Enable adding/removing fib rules
- Enable setting the forwarding state
- Enable adding/removing ipv6 address labels
- Enable setting bridge parameter

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Enable some sysctls that are safe for the userns root
Eric W. Biederman [Fri, 16 Nov 2012 03:03:10 +0000 (03:03 +0000)]
net: Enable some sysctls that are safe for the userns root

- Enable the per device ipv4 sysctls:
   net/ipv4/conf/<if>/forwarding
   net/ipv4/conf/<if>/mc_forwarding
   net/ipv4/conf/<if>/accept_redirects
   net/ipv4/conf/<if>/secure_redirects
   net/ipv4/conf/<if>/shared_media
   net/ipv4/conf/<if>/rp_filter
   net/ipv4/conf/<if>/send_redirects
   net/ipv4/conf/<if>/accept_source_route
   net/ipv4/conf/<if>/accept_local
   net/ipv4/conf/<if>/src_valid_mark
   net/ipv4/conf/<if>/proxy_arp
   net/ipv4/conf/<if>/medium_id
   net/ipv4/conf/<if>/bootp_relay
   net/ipv4/conf/<if>/log_martians
   net/ipv4/conf/<if>/tag
   net/ipv4/conf/<if>/arp_filter
   net/ipv4/conf/<if>/arp_announce
   net/ipv4/conf/<if>/arp_ignore
   net/ipv4/conf/<if>/arp_accept
   net/ipv4/conf/<if>/arp_notify
   net/ipv4/conf/<if>/proxy_arp_pvlan
   net/ipv4/conf/<if>/disable_xfrm
   net/ipv4/conf/<if>/disable_policy
   net/ipv4/conf/<if>/force_igmp_version
   net/ipv4/conf/<if>/promote_secondaries
   net/ipv4/conf/<if>/route_localnet

- Enable the global ipv4 sysctl:
   net/ipv4/ip_forward

- Enable the per device ipv6 sysctls:
   net/ipv6/conf/<if>/forwarding
   net/ipv6/conf/<if>/hop_limit
   net/ipv6/conf/<if>/mtu
   net/ipv6/conf/<if>/accept_ra
   net/ipv6/conf/<if>/accept_redirects
   net/ipv6/conf/<if>/autoconf
   net/ipv6/conf/<if>/dad_transmits
   net/ipv6/conf/<if>/router_solicitations
   net/ipv6/conf/<if>/router_solicitation_interval
   net/ipv6/conf/<if>/router_solicitation_delay
   net/ipv6/conf/<if>/force_mld_version
   net/ipv6/conf/<if>/use_tempaddr
   net/ipv6/conf/<if>/temp_valid_lft
   net/ipv6/conf/<if>/temp_prefered_lft
   net/ipv6/conf/<if>/regen_max_retry
   net/ipv6/conf/<if>/max_desync_factor
   net/ipv6/conf/<if>/max_addresses
   net/ipv6/conf/<if>/accept_ra_defrtr
   net/ipv6/conf/<if>/accept_ra_pinfo
   net/ipv6/conf/<if>/accept_ra_rtr_pref
   net/ipv6/conf/<if>/router_probe_interval
   net/ipv6/conf/<if>/accept_ra_rt_info_max_plen
   net/ipv6/conf/<if>/proxy_ndp
   net/ipv6/conf/<if>/accept_source_route
   net/ipv6/conf/<if>/optimistic_dad
   net/ipv6/conf/<if>/mc_forwarding
   net/ipv6/conf/<if>/disable_ipv6
   net/ipv6/conf/<if>/accept_dad
   net/ipv6/conf/<if>/force_tllao

- Enable the global ipv6 sysctls:
   net/ipv6/bindv6only
   net/ipv6/icmp/ratelimit

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow the userns root to control vlans.
Eric W. Biederman [Fri, 16 Nov 2012 03:03:09 +0000 (03:03 +0000)]
net: Allow the userns root to control vlans.

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) and
capable(CAP_NET_RAW) calls to be ns_capable(net->user_ns,
CAP_NET_ADMIN), or capable(net->user_ns, CAP_NET_RAW) calls.

Allow the vlan ioctls:
SET_VLAN_INGRESS_PRIORITY_CMD
SET_VLAN_EGRESS_PRIORITY_CMD
SET_VLAN_FLAG_CMD
SET_VLAN_NAME_TYPE_CMD
ADD_VLAN_CMD
DEL_VLAN_CMD

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root to control the network bridge code.
Eric W. Biederman [Fri, 16 Nov 2012 03:03:08 +0000 (03:03 +0000)]
net: Allow userns root to control the network bridge code.

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) and
capable(CAP_NET_RAW) calls to be ns_capable(net->user_ns,
CAP_NET_ADMIN), or capable(net->user_ns, CAP_NET_RAW) calls.

Allow setting bridge paramters via sysfs.

Allow all of the bridge ioctls:
BRCTL_ADD_IF
BRCTL_DEL_IF
BRCTL_SET_BRDIGE_FORWARD_DELAY
BRCTL_SET_BRIDGE_HELLO_TIME
BRCTL_SET_BRIDGE_MAX_AGE
BRCTL_SET_BRIDGE_AGING_TIME
BRCTL_SET_BRIDGE_STP_STATE
BRCTL_SET_BRIDGE_PRIORITY
BRCTL_SET_PORT_PRIORITY
BRCTL_SET_PATH_COST
BRCTL_ADD_BRIDGE
BRCTL_DEL_BRDIGE

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root to control llc, netfilter, netlink, packet, and xfrm
Eric W. Biederman [Fri, 16 Nov 2012 03:03:07 +0000 (03:03 +0000)]
net: Allow userns root to control llc, netfilter, netlink, packet, and xfrm

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) and
capable(CAP_NET_RAW) calls to be ns_capable(net->user_ns,
CAP_NET_ADMIN), or capable(net->user_ns, CAP_NET_RAW) calls.

Allow creation of af_key sockets.
Allow creation of llc sockets.
Allow creation of af_packet sockets.

Allow sending xfrm netlink control messages.

Allow binding to netlink multicast groups.
Allow sending to netlink multicast groups.
Allow adding and dropping netlink multicast groups.
Allow sending to all netlink multicast groups and port ids.

Allow reading the netfilter SO_IP_SET socket option.
Allow sending netfilter netlink messages.
Allow setting and getting ip_vs netfilter socket options.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root to control ipv6
Eric W. Biederman [Fri, 16 Nov 2012 03:03:06 +0000 (03:03 +0000)]
net: Allow userns root to control ipv6

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) and
capable(CAP_NET_RAW) calls to be ns_capable(net->user_ns,
CAP_NET_ADMIN), or capable(net->user_ns, CAP_NET_RAW) calls.

Settings that merely control a single network device are allowed.
Either the network device is a logical network device where
restrictions make no difference or the network device is hardware NIC
that has been explicity moved from the initial network namespace.

In general policy and network stack state changes are allowed while
resource control is left unchanged.

Allow the SIOCSIFADDR ioctl to add ipv6 addresses.
Allow the SIOCDIFADDR ioctl to delete ipv6 addresses.
Allow the SIOCADDRT ioctl to add ipv6 routes.
Allow the SIOCDELRT ioctl to delete ipv6 routes.

Allow creation of ipv6 raw sockets.

Allow setting the IPV6_JOIN_ANYCAST socket option.
Allow setting the IPV6_FL_A_RENEW parameter of the IPV6_FLOWLABEL_MGR
socket option.

Allow setting the IPV6_TRANSPARENT socket option.
Allow setting the IPV6_HOPOPTS socket option.
Allow setting the IPV6_RTHDRDSTOPTS socket option.
Allow setting the IPV6_DSTOPTS socket option.
Allow setting the IPV6_IPSEC_POLICY socket option.
Allow setting the IPV6_XFRM_POLICY socket option.

Allow sending packets with the IPV6_2292HOPOPTS control message.
Allow sending packets with the IPV6_2292DSTOPTS control message.
Allow sending packets with the IPV6_RTHDRDSTOPTS control message.

Allow setting the multicast routing socket options on non multicast
routing sockets.

Allow the SIOCADDTUNNEL, SIOCCHGTUNNEL, and SIOCDELTUNNEL ioctls for
setting up, changing and deleting tunnels over ipv6.

Allow the SIOCADDTUNNEL, SIOCCHGTUNNEL, SIOCDELTUNNEL ioctls for
setting up, changing and deleting ipv6 over ipv4 tunnels.

Allow the SIOCADDPRL, SIOCDELPRL, SIOCCHGPRL ioctls for adding,
deleting, and changing the potential router list for ISATAP tunnels.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root to control ipv4
Eric W. Biederman [Fri, 16 Nov 2012 03:03:05 +0000 (03:03 +0000)]
net: Allow userns root to control ipv4

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) and
capable(CAP_NET_RAW) calls to be ns_capable(net->user_ns,
CAP_NET_ADMIN), or capable(net->user_ns, CAP_NET_RAW) calls.

Settings that merely control a single network device are allowed.
Either the network device is a logical network device where
restrictions make no difference or the network device is hardware NIC
that has been explicity moved from the initial network namespace.

In general policy and network stack state changes are allowed
while resource control is left unchanged.

Allow creating raw sockets.
Allow the SIOCSARP ioctl to control the arp cache.
Allow the SIOCSIFFLAG ioctl to allow setting network device flags.
Allow the SIOCSIFADDR ioctl to allow setting a netdevice ipv4 address.
Allow the SIOCSIFBRDADDR ioctl to allow setting a netdevice ipv4 broadcast address.
Allow the SIOCSIFDSTADDR ioctl to allow setting a netdevice ipv4 destination address.
Allow the SIOCSIFNETMASK ioctl to allow setting a netdevice ipv4 netmask.
Allow the SIOCADDRT and SIOCDELRT ioctls to allow adding and deleting ipv4 routes.

Allow the SIOCADDTUNNEL, SIOCCHGTUNNEL and SIOCDELTUNNEL ioctls for
adding, changing and deleting gre tunnels.

Allow the SIOCADDTUNNEL, SIOCCHGTUNNEL and SIOCDELTUNNEL ioctls for
adding, changing and deleting ipip tunnels.

Allow the SIOCADDTUNNEL, SIOCCHGTUNNEL and SIOCDELTUNNEL ioctls for
adding, changing and deleting ipsec virtual tunnel interfaces.

Allow setting the MRT_INIT, MRT_DONE, MRT_ADD_VIF, MRT_DEL_VIF, MRT_ADD_MFC,
MRT_DEL_MFC, MRT_ASSERT, MRT_PIM, MRT_TABLE socket options on multicast routing
sockets.

Allow setting and receiving IPOPT_CIPSO, IP_OPT_SEC, IP_OPT_SID and
arbitrary ip options.

Allow setting IP_SEC_POLICY/IP_XFRM_POLICY ipv4 socket option.
Allow setting the IP_TRANSPARENT ipv4 socket option.
Allow setting the TCP_REPAIR socket option.
Allow setting the TCP_CONGESTION socket option.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root control of the core of the network stack.
Eric W. Biederman [Fri, 16 Nov 2012 03:03:04 +0000 (03:03 +0000)]
net: Allow userns root control of the core of the network stack.

Allow an unpriviled user who has created a user namespace, and then
created a network namespace to effectively use the new network
namespace, by reducing capable(CAP_NET_ADMIN) and
capable(CAP_NET_RAW) calls to be ns_capable(net->user_ns,
CAP_NET_ADMIN), or capable(net->user_ns, CAP_NET_RAW) calls.

Settings that merely control a single network device are allowed.
Either the network device is a logical network device where
restrictions make no difference or the network device is hardware NIC
that has been explicity moved from the initial network namespace.

In general policy and network stack state changes are allowed
while resource control is left unchanged.

Allow ethtool ioctls.

Allow binding to network devices.
Allow setting the socket mark.
Allow setting the socket priority.

Allow setting the network device alias via sysfs.
Allow setting the mtu via sysfs.
Allow changing the network device flags via sysfs.
Allow setting the network device group via sysfs.

Allow the following network device ioctls.
SIOCGMIIPHY
SIOCGMIIREG
SIOCSIFNAME
SIOCSIFFLAGS
SIOCSIFMETRIC
SIOCSIFMTU
SIOCSIFHWADDR
SIOCSIFSLAVE
SIOCADDMULTI
SIOCDELMULTI
SIOCSIFHWBROADCAST
SIOCSMIIREG
SIOCBONDENSLAVE
SIOCBONDRELEASE
SIOCBONDSETHWADDR
SIOCBONDCHANGEACTIVE
SIOCBRADDIF
SIOCBRDELIF
SIOCSHWTSTAMP

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Allow userns root to force the scm creds
Eric W. Biederman [Fri, 16 Nov 2012 03:03:03 +0000 (03:03 +0000)]
net: Allow userns root to force the scm creds

If the user calling sendmsg has the appropriate privieleges
in their user namespace allow them to set the uid, gid, and
pid in the SCM_CREDENTIALS control message to any valid value.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agouser_ns: get rid of duplicate code in net_ctl_permissions
Zhao Hongjiang [Fri, 16 Nov 2012 03:03:02 +0000 (03:03 +0000)]
user_ns: get rid of duplicate code in net_ctl_permissions

Get rid of duplicate code in net_ctl_permissions and fix the comment.

Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Update the per network namespace sysctls to be available to the network namespac...
Eric W. Biederman [Fri, 16 Nov 2012 03:03:01 +0000 (03:03 +0000)]
net: Update the per network namespace sysctls to be available to the network namespace owner

- Allow anyone with CAP_NET_ADMIN rights in the user namespace of the
  the netowrk namespace to change sysctls.
- Allow anyone the uid of the user namespace root the same
  permissions over the network namespace sysctls as the global root.
- Allow anyone with gid of the user namespace root group the same
  permissions over the network namespace sysctl as the global root group.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Push capable(CAP_NET_ADMIN) into the rtnl methods
Eric W. Biederman [Fri, 16 Nov 2012 03:03:00 +0000 (03:03 +0000)]
net: Push capable(CAP_NET_ADMIN) into the rtnl methods

- In rtnetlink_rcv_msg convert the capable(CAP_NET_ADMIN) check
  to ns_capable(net->user-ns, CAP_NET_ADMIN).  Allowing unprivileged
  users to make netlink calls to modify their local network
  namespace.

- In the rtnetlink doit methods add capable(CAP_NET_ADMIN) so
  that calls that are not safe for unprivileged users are still
  protected.

Later patches will remove the extra capable calls from methods
that are safe for unprivilged users.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Don't export sysctls to unprivileged users
Eric W. Biederman [Fri, 16 Nov 2012 03:02:59 +0000 (03:02 +0000)]
net: Don't export sysctls to unprivileged users

In preparation for supporting the creation of network namespaces
by unprivileged users, modify all of the per net sysctl exports
and refuse to allow them to unprivileged users.

This makes it safe for unprivileged users in general to access
per net sysctls, and allows sysctls to be exported to unprivileged
users on an individual basis as they are deemed safe.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosysctl: Pass useful parameters to sysctl permissions
Eric W. Biederman [Fri, 16 Nov 2012 03:02:58 +0000 (03:02 +0000)]
sysctl: Pass useful parameters to sysctl permissions

- Current is implicitly avaiable so passing current->nsproxy isn't useful.
- The ctl_table_header is needed to find how the sysctl table is connected
  to the rest of sysctl.
- ctl_table_root is avaiable in the ctl_table_header so no need to it.

With these changes it becomes possible to write a version of
net_sysctl_permission that takes into account the network namespace of
the sysctl table, an important feature in extending the user namespace.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agouserns: make each net (net_ns) belong to a user_ns
Eric W. Biederman [Fri, 16 Nov 2012 03:02:57 +0000 (03:02 +0000)]
userns: make each net (net_ns) belong to a user_ns

The user namespace which creates a new network namespace owns that
namespace and all resources created in it.  This way we can target
capability checks for privileged operations against network resources to
the user_ns which created the network namespace in which the resource
lives.  Privilege to the user namespace which owns the network
namespace, or any parent user namespace thereof, provides the same
privilege to the network resource.

This patch is reworked from a version originally by
Serge E. Hallyn <serge.hallyn@canonical.com>

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonetns: Deduplicate and fix copy_net_ns when !CONFIG_NET_NS
Eric W. Biederman [Fri, 16 Nov 2012 03:02:56 +0000 (03:02 +0000)]
netns: Deduplicate and fix copy_net_ns when !CONFIG_NET_NS

The copy of copy_net_ns used when the network stack is not
built is broken as it does not return -EINVAL when attempting
to create a new network namespace.  We don't even have
a previous network namespace.

Since we need a copy of copy_net_ns in net/net_namespace.h that is
available when the networking stack is not built at all move the
correct version of copy_net_ns from net_namespace.c into net_namespace.h
Leaving us with just 2 versions of copy_net_ns.  One version for when
we compile in network namespace suport and another stub for all other
occasions.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoipv6: Preserve ipv6 functionality needed by NET
Vlad Yasevich [Fri, 16 Nov 2012 09:41:21 +0000 (09:41 +0000)]
ipv6: Preserve ipv6 functionality needed by NET

Some pieces of network use core pieces of IPv6 stack.  Keep
them available while letting new GSO offload pieces depend
on CONFIG_INET.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqlcnic: fix sparse warnings
Sony Chacko [Sat, 17 Nov 2012 21:04:39 +0000 (21:04 +0000)]
qlcnic: fix sparse warnings

qlcnic_hw.c:1337:17: warning: cast removes address space of expression
qlcnic_hw.c:1337:17: warning: incorrect type in argument 2 (different address spaces)
qlcnic_hw.c:1337:17:    expected void volatile [noderef] <asn:2>*addr
qlcnic_hw.c:1337:17:    got void *<noident>
qlcnic_hw.c:1337:17: warning: cast removes address space of expression
qlcnic_hw.c:1337:17: warning: incorrect type in argument 1 (different address spaces)
qlcnic_hw.c:1337:17:    expected void const volatile [noderef] <asn:2>*addr
qlcnic_hw.c:1337:17:    got void *<noident>

The above warnings are originating from the macros QLCNIC_RD_DUMP_REG and
QLCNIC_WR_DUMP_REG.
The warnings are fixed and macros are replaced with equivalent functions
in the only file from where it is called.

The following warnings are fixed by making the functions static.

qlcnic_hw.c:543:5: warning: symbol 'qlcnic_set_fw_loopback' was not declared. Should it be static?
qlcnic_init.c:1853:6: warning: symbol 'qlcnic_process_rcv_diag' was not declared. Should it be static?

Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoqlcnic: fix compiler warnings
Sony Chacko [Sat, 17 Nov 2012 21:04:38 +0000 (21:04 +0000)]
qlcnic: fix compiler warnings

Fix the following warnings:

qlcnic_main.c: In function 'qlcnic_update_cmd_producer':
qlcnic_main.c:119:51: warning: unused parameter 'adapter' [-Wunused-parameter]
qlcnic_main.c:119: warning: unused parameter adapter
qlcnic_init.c: In function qlcnic_process_lro
qlcnic_init.c:1586: warning: unused parameter sds_ring
qlcnic_init.c: In function qlcnic_process_rcv_diag
qlcnic_init.c:1854: warning: unused parameter sds_ring
qlcnic_init.c: In function qlcnic_fetch_mac
qlcnic_init.c:1938: warning: unused parameter adapter

warning: 'pci_using_dac' may be used uninitialized in this function [-Wmaybe-uninitialized]
qlcnic_main.c:1569:10: note: 'pci_using_dac' was declared here

Signed-off-by: Sony Chacko <sony.chacko@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoPPC: net: bpf_jit_comp: add VLAN instructions for BPF JIT
Daniel Borkmann [Thu, 8 Nov 2012 11:41:39 +0000 (11:41 +0000)]
PPC: net: bpf_jit_comp: add VLAN instructions for BPF JIT

This patch is a follow-up for patch "net: filter: add vlan tag access"
to support the new VLAN_TAG/VLAN_TAG_PRESENT accessors in BPF JIT.

Signed-off-by: Daniel Borkmann <daniel.borkmann@tik.ee.ethz.ch>
Cc: Matt Evans <matt@ozlabs.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoPPC: net: bpf_jit_comp: add XOR instruction for BPF JIT
Daniel Borkmann [Thu, 8 Nov 2012 11:39:41 +0000 (11:39 +0000)]
PPC: net: bpf_jit_comp: add XOR instruction for BPF JIT

This patch is a follow-up for patch "filter: add XOR instruction for use
with X/K" that implements BPF PowerPC JIT parts for the BPF XOR operation.

Signed-off-by: Daniel Borkmann <daniel.borkmann@tik.ee.ethz.ch>
Cc: Matt Evans <matt@ozlabs.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agopch_gbe, ptp_pch: Fix the dependency direction between these drivers
Ben Hutchings [Fri, 16 Nov 2012 15:43:59 +0000 (15:43 +0000)]
pch_gbe, ptp_pch: Fix the dependency direction between these drivers

In commit a24006ed12616bde1bbdb26868495906a212d8dc ('ptp: Enable clock
drivers along with associated net/PHY drivers') I wrongly made
PTP_1588_CLOCK_PCH depend on PCH_GBE.  The dependency is really the
other way around.  Therefore make PCH_GBE select PTP_1588_CLOCK_PCH
and remove the 'default y' from the latter.

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agovxlan: remove unused variable.
Rami Rosen [Sat, 17 Nov 2012 04:08:07 +0000 (04:08 +0000)]
vxlan: remove unused variable.

This patch removes addrexceeded member from vxlan_dev struct as it is unused.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agosctp: use bitmap_weight
Akinobu Mita [Fri, 16 Nov 2012 20:39:49 +0000 (20:39 +0000)]
sctp: use bitmap_weight

Use bitmap_weight to count the total number of bits set in bitmap.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Cc: linux-sctp@vger.kernel.org
Cc: netdev@vger.kernel.org
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
David S. Miller [Sun, 18 Nov 2012 03:00:43 +0000 (22:00 -0500)]
Merge git://git./linux/kernel/git/davem/net

Minor line offset auto-merges.

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoLinux 3.7-rc6
Linus Torvalds [Sat, 17 Nov 2012 01:42:40 +0000 (17:42 -0800)]
Linux 3.7-rc6

12 years agoMerge git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 17 Nov 2012 00:49:10 +0000 (16:49 -0800)]
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fix from Marcelo Tosatti:
 "A correction for oops on module init with older Intel hosts."

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Fix invalid secondary exec controls in vmx_cpuid_update()

12 years agoMerge branch 'akpm' (Fixes from Andrew)
Linus Torvalds [Fri, 16 Nov 2012 23:26:38 +0000 (15:26 -0800)]
Merge branch 'akpm' (Fixes from Andrew)

Merge misc fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (12 patches)
  revert "mm: fix-up zone present pages"
  tmpfs: change final i_blocks BUG to WARNING
  tmpfs: fix shmem_getpage_gfp() VM_BUG_ON
  mm: highmem: don't treat PKMAP_ADDR(LAST_PKMAP) as a highmem address
  mm: revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures"
  rapidio: fix kernel-doc warnings
  swapfile: fix name leak in swapoff
  memcg: fix hotplugged memory zone oops
  mips, arc: fix build failure
  memcg: oom: fix totalpages calculation for memory.swappiness==0
  mm: fix build warning for uninitialized value
  mm: add anon_vma_lock to validate_mm()

12 years agorevert "mm: fix-up zone present pages"
Andrew Morton [Fri, 16 Nov 2012 22:15:06 +0000 (14:15 -0800)]
revert "mm: fix-up zone present pages"

Revert commit 7f1290f2f2a4 ("mm: fix-up zone present pages")

That patch tried to fix a issue when calculating zone->present_pages,
but it caused a regression on 32bit systems with HIGHMEM.  With that
change, reset_zone_present_pages() resets all zone->present_pages to
zero, and fixup_zone_present_pages() is called to recalculate
zone->present_pages when the boot allocator frees core memory pages into
buddy allocator.  Because highmem pages are not freed by bootmem
allocator, all highmem zones' present_pages becomes zero.

Various options for improving the situation are being discussed but for
now, let's return to the 3.6 code.

Cc: Jianguo Wu <wujianguo@huawei.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Petr Tesarik <ptesarik@suse.cz>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David Rientjes <rientjes@google.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agotmpfs: change final i_blocks BUG to WARNING
Hugh Dickins [Fri, 16 Nov 2012 22:15:04 +0000 (14:15 -0800)]
tmpfs: change final i_blocks BUG to WARNING

Under a particular load on one machine, I have hit shmem_evict_inode()'s
BUG_ON(inode->i_blocks), enough times to narrow it down to a particular
race between swapout and eviction.

It comes from the "if (freed > 0)" asymmetry in shmem_recalc_inode(),
and the lack of coherent locking between mapping's nrpages and shmem's
swapped count.  There's a window in shmem_writepage(), between lowering
nrpages in shmem_delete_from_page_cache() and then raising swapped
count, when the freed count appears to be +1 when it should be 0, and
then the asymmetry stops it from being corrected with -1 before hitting
the BUG.

One answer is coherent locking: using tree_lock throughout, without
info->lock; reasonable, but the raw_spin_lock in percpu_counter_add() on
used_blocks makes that messier than expected.  Another answer may be a
further effort to eliminate the weird shmem_recalc_inode() altogether,
but previous attempts at that failed.

So far undecided, but for now change the BUG_ON to WARN_ON: in usual
circumstances it remains a useful consistency check.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agotmpfs: fix shmem_getpage_gfp() VM_BUG_ON
Hugh Dickins [Fri, 16 Nov 2012 22:15:03 +0000 (14:15 -0800)]
tmpfs: fix shmem_getpage_gfp() VM_BUG_ON

Fuzzing with trinity hit the "impossible" VM_BUG_ON(error) (which Fedora
has converted to WARNING) in shmem_getpage_gfp():

  WARNING: at mm/shmem.c:1151 shmem_getpage_gfp+0xa5c/0xa70()
  Pid: 29795, comm: trinity-child4 Not tainted 3.7.0-rc2+ #49
  Call Trace:
    warn_slowpath_common+0x7f/0xc0
    warn_slowpath_null+0x1a/0x20
    shmem_getpage_gfp+0xa5c/0xa70
    shmem_fault+0x4f/0xa0
    __do_fault+0x71/0x5c0
    handle_pte_fault+0x97/0xae0
    handle_mm_fault+0x289/0x350
    __do_page_fault+0x18e/0x530
    do_page_fault+0x2b/0x50
    page_fault+0x28/0x30
    tracesys+0xe1/0xe6

Thanks to Johannes for pointing to truncation: free_swap_and_cache()
only does a trylock on the page, so the page lock we've held since
before confirming swap is not enough to protect against truncation.

What cleanup is needed in this case? Just delete_from_swap_cache(),
which takes care of the memcg uncharge.

Signed-off-by: Hugh Dickins <hughd@google.com>
Reported-by: Dave Jones <davej@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm: highmem: don't treat PKMAP_ADDR(LAST_PKMAP) as a highmem address
Will Deacon [Fri, 16 Nov 2012 22:15:00 +0000 (14:15 -0800)]
mm: highmem: don't treat PKMAP_ADDR(LAST_PKMAP) as a highmem address

kmap_to_page returns the corresponding struct page for a virtual address
of an arbitrary mapping.  This works by checking whether the address
falls in the pkmap region and using the pkmap page tables instead of the
linear mapping if appropriate.

Unfortunately, the bounds checking means that PKMAP_ADDR(LAST_PKMAP) is
incorrectly treated as a highmem address and we can end up walking off
the end of pkmap_page_table and subsequently passing junk to pte_page.

This patch fixes the bound check to stay within the pkmap tables.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomm: revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based...
Mel Gorman [Fri, 16 Nov 2012 22:14:59 +0000 (14:14 -0800)]
mm: revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures"

Jiri Slaby reported the following:

(It's an effective revert of "mm: vmscan: scale number of pages
reclaimed by reclaim/compaction based on failures".) Given kswapd
had hours of runtime in ps/top output yesterday in the morning
and after the revert it's now 2 minutes in sum for the last 24h,
I would say, it's gone.

The intention of the patch in question was to compensate for the loss of
lumpy reclaim.  Part of the reason lumpy reclaim worked is because it
aggressively reclaimed pages and this patch was meant to be a sane
compromise.

When compaction fails, it gets deferred and both compaction and
reclaim/compaction is deferred avoid excessive reclaim.  However, since
commit c654345924f7 ("mm: remove __GFP_NO_KSWAPD"), kswapd is woken up
each time and continues reclaiming which was not taken into account when
the patch was developed.

Attempts to address the problem ended up just changing the shape of the
problem instead of fixing it.  The release window gets closer and while
a THP allocation failing is not a major problem, kswapd chewing up a lot
of CPU is.

This patch reverts commit 83fde0f22872 ("mm: vmscan: scale number of
pages reclaimed by reclaim/compaction based on failures") and will be
revisited in the future.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Zdenek Kabelac <zkabelac@redhat.com>
Tested-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agorapidio: fix kernel-doc warnings
Randy Dunlap [Fri, 16 Nov 2012 22:14:56 +0000 (14:14 -0800)]
rapidio: fix kernel-doc warnings

Fix rapidio kernel-doc warnings:

  Warning(drivers/rapidio/rio.c:415): No description found for parameter 'local'
  Warning(drivers/rapidio/rio.c:415): Excess function parameter 'lstart' description in 'rio_map_inb_region'
  Warning(include/linux/rio.h:290): No description found for parameter 'switches'
  Warning(include/linux/rio.h:290): No description found for parameter 'destid_table'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoswapfile: fix name leak in swapoff
Xiaotian Feng [Fri, 16 Nov 2012 22:14:55 +0000 (14:14 -0800)]
swapfile: fix name leak in swapoff

There's a name leak introduced by commit 91a27b2a7567 ("vfs: define
struct filename and have getname() return it").  Add the missing
putname.

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Xiaotian Feng <dannyfeng@tencent.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: fix hotplugged memory zone oops
Hugh Dickins [Fri, 16 Nov 2012 22:14:54 +0000 (14:14 -0800)]
memcg: fix hotplugged memory zone oops

When MEMCG is configured on (even when it's disabled by boot option),
when adding or removing a page to/from its lru list, the zone pointer
used for stats updates is nowadays taken from the struct lruvec.  (On
many configurations, calculating zone from page is slower.)

But we have no code to update all the lruvecs (per zone, per memcg) when
a memory node is hotadded.  Here's an extract from the oops which
results when running numactl to bind a program to a newly onlined node:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000f60
  IP:  __mod_zone_page_state+0x9/0x60
  Pid: 1219, comm: numactl Not tainted 3.6.0-rc5+ #180 Bochs Bochs
  Process numactl (pid: 1219, threadinfo ffff880039abc000, task ffff8800383c4ce0)
  Call Trace:
    __pagevec_lru_add_fn+0xdf/0x140
    pagevec_lru_move_fn+0xb1/0x100
    __pagevec_lru_add+0x1c/0x30
    lru_add_drain_cpu+0xa3/0x130
    lru_add_drain+0x2f/0x40
   ...

The natural solution might be to use a memcg callback whenever memory is
hotadded; but that solution has not been scoped out, and it happens that
we do have an easy location at which to update lruvec->zone.  The lruvec
pointer is discovered either by mem_cgroup_zone_lruvec() or by
mem_cgroup_page_lruvec(), and both of those do know the right zone.

So check and set lruvec->zone in those; and remove the inadequate
attempt to set lruvec->zone from lruvec_init(), which is called before
NODE_DATA(node) has been allocated in such cases.

Ah, there was one exceptionr.  For no particularly good reason,
mem_cgroup_force_empty_list() has its own code for deciding lruvec.
Change it to use the standard mem_cgroup_zone_lruvec() and
mem_cgroup_get_lru_size() too.  In fact it was already safe against such
an oops (the lru lists in danger could only be empty), but we're better
proofed against future changes this way.

I've marked this for stable (3.6) since we introduced the problem in 3.5
(now closed to stable); but I have no idea if this is the only fix
needed to get memory hotadd working with memcg in 3.6, and received no
answer when I enquired twice before.

Reported-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomips, arc: fix build failure
David Rientjes [Fri, 16 Nov 2012 22:14:52 +0000 (14:14 -0800)]
mips, arc: fix build failure

Using a cross-compiler to fix another issue, the following build error
occurred for mips defconfig:

  arch/mips/fw/arc/misc.c: In function 'ArcHalt':
  arch/mips/fw/arc/misc.c:25:2: error: implicit declaration of function 'local_irq_disable'

Fix it up by including irqflags.h.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: oom: fix totalpages calculation for memory.swappiness==0
Michal Hocko [Fri, 16 Nov 2012 22:14:49 +0000 (14:14 -0800)]
memcg: oom: fix totalpages calculation for memory.swappiness==0

oom_badness() takes a totalpages argument which says how many pages are
available and it uses it as a base for the score calculation.  The value
is calculated by mem_cgroup_get_limit which considers both limit and
total_swap_pages (resp.  memsw portion of it).

This is usually correct but since fe35004fbf9e ("mm: avoid swapping out
with swappiness==0") we do not swap when swappiness is 0 which means
that we cannot really use up all the totalpages pages.  This in turn
confuses oom score calculation if the memcg limit is much smaller than
the available swap because the used memory (capped by the limit) is
negligible comparing to totalpages so the resulting score is too small
if adj!=0 (typically task with CAP_SYS_ADMIN or non zero oom_score_adj).
A wrong process might be selected as result.

The problem can be worked around by checking mem_cgroup_swappiness==0
and not considering swap at all in such a case.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>