Commit Graph

495805 Commits

Author SHA1 Message Date
Linus Torvalds 0adc180388 Fix a compile warning
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Merge tag 'for-linus-3' of git://git.code.sf.net/p/openipmi/linux-ipmi

Pull IPMI fixlet from Corey Minyard:
 "Fix a compile warning"

* tag 'for-linus-3' of git://git.code.sf.net/p/openipmi/linux-ipmi:
  ipmi: Fix compile warning with tv_usec
2015-01-06 17:39:31 -08:00
Anjali Singhai df23075fc8 i40e: Fix bug with TCP over IPv6 over VXLAN
The driver was examining the outer protocol layer to set the inner protocol
layer checksum offload.  In the case of TCP over IPV6 over an IPv4 based
VXLAN the inner checksum offloads would be set to look for IPv4/UDP instead
of IPv6/TCP.  This code fixes that so that the driver will look at the
proper layer for encapsulation offload settings.

Signed-off-by: Anjali Singhai <anjali.singhai@intel.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-06 17:15:03 -08:00
Anjali Singhai f6385979d6 i40e: Fix Rx checksum error counter
The Rx port checksum error counter was incrementing incorrectly with
UDP encapsulated tunneled traffic.  This patch fixes the problem so that
the port_rx_csum counter will show accurate statistics.

Signed-off-by: Anjali Singhai <anjali.singhai@intel.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-06 17:14:57 -08:00
Jesse Brandeburg d91649f5b7 i40e: fix un-necessary Tx hangs
When the driver was polling with interrupts disabled the hardware
will occasionally not write back descriptors.  This patch causes
the driver to detect this situation and force an interrupt to
fire which will flush the stuck descriptor.  Does not conflict
with napi because if we are already polling the napi_schedule is
ignored.  Additionally the extra interrupts are rate limited, so
don't cause a burden to the CPU.

Change-ID: Iba4616d2a71288672a5f08e4512e2704b97335e8
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2015-01-06 16:57:18 -08:00
Feng Kan de7b5b3d79 net: eth: xgene: change APM X-Gene SoC platform ethernet to support ACPI
This adds support for APM X-Gene ethernet driver to use ACPI table to derive
ethernet driver parameter.

Signed-off-by: Feng Kan <fkan@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 17:43:13 -05:00
Andy Shevchenko 2abad79afa qla3xxx: don't allow never end busy loop
The counter variable wasn't increased at all which may stuck under
certain circumstances.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 17:41:36 -05:00
Rafael J. Wysocki 794c3a0a93 Merge branches 'acpi-pm', 'acpi-processor' and 'acpi-video'
* acpi-pm:
  ACPI / PM: Fix PM initialization for devices that are not present

* acpi-processor:
  ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()
  ACPI / processor: Convert apic_id to phys_id to make it arch agnostic

* acpi-video:
  ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
2015-01-06 23:35:43 +01:00
Hans de Goede 6a3ef10bac ACPI / video: Add disable_native_backlight quirk for Dell XPS15 L521X
The L521X variant of the Dell XPS15 has integrated nvidia graphics, and
backlight control does not work properly when using the native interfaces.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1163574
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-01-06 23:34:48 +01:00
Andy Fleming 1fcf77c87a net/fsl: Add mEMAC MDIO support to XGMAC MDIO
The Freescale mEMAC supports operating at 10/100/1000/10G, and
its associated MDIO controller is likewise capable of operating
both Clause 22 and Clause 45 MDIO buses. It is nearly identical
to the MDIO controller on the XGMAC, so we just modify that
driver.

Portions of this driver developed by:

Sandeep Singh <sandeep@freescale.com>
Roy Zang <tie-fei.zang@freescale.com>

Signed-off-by: Andy Fleming <afleming@gmail.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 17:18:26 -05:00
Ed Swierk 2f4383667d ethtool: Extend ethtool plugin module eeprom API to phylib
This patch extends the ethtool plugin module eeprom API to support cards
whose phy support is delegated to a separate driver.

The handlers for ETHTOOL_GMODULEINFO and ETHTOOL_GMODULEEEPROM call the
module_info and module_eeprom functions if the phy driver provides them;
otherwise the handlers call the equivalent ethtool_ops functions provided
by network drivers with built-in phy support.

Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 17:16:55 -05:00
Linus Torvalds 3b421b80be Revert a potential seek_data/hole regression which shows up when using
ext4 to handle ext3 file systems, plus two minor bug fixes.
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 bugfixes from Ted Ts'o:
 "Revert a potential seek_data/hole regression which shows up when using
  ext4 to handle ext3 file systems, plus two minor bug fixes"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: remove spurious KERN_INFO from ext4_warning call
  Revert "ext4: fix suboptimal seek_{data,hole} extents traversial"
  ext4: prevent online resize with backup superblock
2015-01-06 14:05:40 -08:00
Nicholas Bellinger 67e51daa50 Documentation/target: Update fabric_ops to latest code
This patch updates tcm_mod_builder.py to add/drop a handful of
struct target_core_fabric_ops functions to sync up with the
latest requirements to function in target_fabric_tf_ops_check().

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-01-06 13:46:49 -08:00
Nicholas Bellinger 4624386080 vhost-scsi: Add missing virtio-scsi -> TCM attribute conversion
While looking at hch's recent conversion to drop the MSG_*_TAG
definitions, I noticed a long standing bug in vhost-scsi where
the VIRTIO_SCSI_S_* attribute definitions where incorrectly
being passed directly into target_submit_cmd_map_sgls().

This patch adds the missing virtio-scsi to TCM/SAM task attribute
conversion.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: stable@vger.kernel.org # 3.5
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-01-06 13:46:29 -08:00
Pablo Neira Ayuso a2f18db0c6 netfilter: nf_tables: fix flush ruleset chain dependencies
Jumping between chains doesn't mix well with flush ruleset. Rules
from a different chain and set elements may still refer to us.

[  353.373791] ------------[ cut here ]------------
[  353.373845] kernel BUG at net/netfilter/nf_tables_api.c:1159!
[  353.373896] invalid opcode: 0000 [#1] SMP
[  353.373942] Modules linked in: intel_powerclamp uas iwldvm iwlwifi
[  353.374017] CPU: 0 PID: 6445 Comm: 31c3.nft Not tainted 3.18.0 #98
[  353.374069] Hardware name: LENOVO 5129CTO/5129CTO, BIOS 6QET47WW (1.17 ) 07/14/2010
[...]
[  353.375018] Call Trace:
[  353.375046]  [<ffffffff81964c31>] ? nf_tables_commit+0x381/0x540
[  353.375101]  [<ffffffff81949118>] nfnetlink_rcv+0x3d8/0x4b0
[  353.375150]  [<ffffffff81943fc5>] netlink_unicast+0x105/0x1a0
[  353.375200]  [<ffffffff8194438e>] netlink_sendmsg+0x32e/0x790
[  353.375253]  [<ffffffff818f398e>] sock_sendmsg+0x8e/0xc0
[  353.375300]  [<ffffffff818f36b9>] ? move_addr_to_kernel.part.20+0x19/0x70
[  353.375357]  [<ffffffff818f44f9>] ? move_addr_to_kernel+0x19/0x30
[  353.375410]  [<ffffffff819016d2>] ? verify_iovec+0x42/0xd0
[  353.375459]  [<ffffffff818f3e10>] ___sys_sendmsg+0x3f0/0x400
[  353.375510]  [<ffffffff810615fa>] ? native_sched_clock+0x2a/0x90
[  353.375563]  [<ffffffff81176697>] ? acct_account_cputime+0x17/0x20
[  353.375616]  [<ffffffff8110dc78>] ? account_user_time+0x88/0xa0
[  353.375667]  [<ffffffff818f4bbd>] __sys_sendmsg+0x3d/0x80
[  353.375719]  [<ffffffff81b184f4>] ? int_check_syscall_exit_work+0x34/0x3d
[  353.375776]  [<ffffffff818f4c0d>] SyS_sendmsg+0xd/0x20
[  353.375823]  [<ffffffff81b1826d>] system_call_fastpath+0x16/0x1b

Release objects in this order: rules -> sets -> chains -> tables, to
make sure no references to chains are held anymore.

Reported-by: Asbjoern Sloth Toennesen <asbjorn@asbjorn.biz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-01-06 22:27:48 +01:00
Pablo Neira Ayuso 62924af247 netfilter: nfnetlink: relax strict multicast group check from netlink_bind
Relax the checking that was introduced in 97840cb ("netfilter:
nfnetlink: fix insufficient validation in nfnetlink_bind") when the
subscription bitmask is used. Existing userspace code code may request
to listen to all of the existing netlink groups by setting an all to one
subscription group bitmask. Netlink already validates subscription via
setsockopt() for us.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-01-06 22:27:47 +01:00
Pablo Neira Ayuso 9ea2aa8b7d netfilter: nfnetlink: validate nfnetlink header from batch
Make sure there is enough room for the nfnetlink header in the
netlink messages that are part of the batch. There is a similar
check in netlink_rcv_skb().

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-01-06 22:27:46 +01:00
Pablo Neira Ayuso 8ca3f5e974 netfilter: conntrack: fix race between confirmation and flush
Commit 5195c14c8b ("netfilter: conntrack: fix race in
__nf_conntrack_confirm against get_next_corpse") aimed to resolve the
race condition between the confirmation (packet path) and the flush
command (from control plane). However, it introduced a crash when
several packets race to add a new conntrack, which seems easier to
reproduce when nf_queue is in place.

Fix this race, in __nf_conntrack_confirm(), by removing the CT
from unconfirmed list before checking the DYING bit. In case
race occured, re-add the CT to the dying list

This patch also changes the verdict from NF_ACCEPT to NF_DROP when
we lose race. Basically, the confirmation happens for the first packet
that we see in a flow. If you just invoked conntrack -F once (which
should be the common case), then this is likely to be the first packet
of the flow (unless you already called flush anytime soon in the past).
This should be hard to trigger, but better drop this packet, otherwise
we leave things in inconsistent state since the destination will likely
reply to this packet, but it will find no conntrack, unless the origin
retransmits.

The change of the verdict has been discussed in:
https://www.marc.info/?l=linux-netdev&m=141588039530056&w=2

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2015-01-06 22:27:45 +01:00
Linus Torvalds fee7e49d45 mm: propagate error from stack expansion even for guard page
Jay Foad reports that the address sanitizer test (asan) sometimes gets
confused by a stack pointer that ends up being outside the stack vma
that is reported by /proc/maps.

This happens due to an interaction between RLIMIT_STACK and the guard
page: when we do the guard page check, we ignore the potential error
from the stack expansion, which effectively results in a missing guard
page, since the expected stack expansion won't have been done.

And since /proc/maps explicitly ignores the guard page (commit
d7824370e263: "mm: fix up some user-visible effects of the stack guard
page"), the stack pointer ends up being outside the reported stack area.

This is the minimal patch: it just propagates the error.  It also
effectively makes the guard page part of the stack limit, which in turn
measn that the actual real stack is one page less than the stack limit.

Let's see if anybody notices.  We could teach acct_stack_growth() to
allow an extra page for a grow-up/grow-down stack in the rlimit test,
but I don't want to add more complexity if it isn't needed.

Reported-and-tested-by: Jay Foad <jay.foad@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-01-06 13:00:05 -08:00
dann frazier 13e634de09 tools: testing: selftests: mq_perf_tests: Fix infinite loop on ARM
We can't use a char type to check for a negative return value since char
isn't guaranteed to be signed. Indeed, the char type tends to be unsigned on
ARM.

Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-01-06 12:55:21 -07:00
David Drysdale cd805f3676 selftests/exec: allow shell return code of 126
When the shell fails to invoke a script because its path name
is too long (ENAMETOOLONG), most shells return 127 to indicate
command not found.  However, some systems report 126 (which POSIX
suggests should indicate a non-executable file) for this case,
so allow that too.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David Drysdale <drysdale@google.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-01-06 12:54:54 -07:00
David S. Miller 627d2cc016 Included changes:
- ensure bonding is used (if enabled) for packets coming in the soft
   interface
 - fix race condition to avoid orig_nodes to be deleted right after
   being added
 - avoid false positive lockdep splats by assigning lockclass to
   the proper hashtable lock objects
 - avoid miscounting of multicast 'disabled' nodes in the network
 - fix memory leak in the Global Translation Table in case of
   originator interval change
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Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge

Included changes:
- ensure bonding is used (if enabled) for packets coming in the soft
  interface
- fix race condition to avoid orig_nodes to be deleted right after
  being added
- avoid false positive lockdep splats by assigning lockclass to
  the proper hashtable lock objects
- avoid miscounting of multicast 'disabled' nodes in the network
- fix memory leak in the Global Translation Table in case of
  originator interval change

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 14:24:49 -05:00
Palik, Imre 07ff890dae xen-netback: fixing the propagation of the transmit shaper timeout
Since e9ce7cb6b1 ("xen-netback: Factor queue-specific data into queue struct"),
the transimt shaper timeout is always set to 0.  The value the user sets via
xenbus is never propagated to the transmit shaper.

This patch fixes the issue.

Cc: Anthony Liguori <aliguori@amazon.com>
Signed-off-by: Imre Palik <imrep@amazon.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 14:17:37 -05:00
Shrikrishna Khare 53831aa125 Driver: Vmxnet3: Make Rx ring 2 size configurable
Rx ring 2 size can be configured by adjusting rx-jumbo parameter
of ethtool -G.

Signed-off-by: Ramya Bolla <bollar@vmware.com>
Signed-off-by: Shreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 14:15:16 -05:00
David S. Miller 15ecf7a063 Here's just a single fix - a revert of a patch that broke the
p54 and cw2100 drivers (arguably due to bad assumptions there.)
 Since this affects kernels since 3.17, I decided to revert for
 now and we'll revisit this optimisation properly for -next.
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Merge tag 'mac80211-for-davem-2015-01-06' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Here's just a single fix - a revert of a patch that broke the
p54 and cw2100 drivers (arguably due to bad assumptions there.)
Since this affects kernels since 3.17, I decided to revert for
now and we'll revisit this optimisation properly for -next.

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 13:29:27 -05:00
hayeswang a5e31255e0 r8152: support ndo_features_check
Support ndo_features_check to avoid:
 - the transport offset is more than the hw limitation when using hw checksum.
 - the skb->len of a GSO packet is more than the limitation.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 13:29:13 -05:00
Richard Cochran 7c8f1e7861 arm_arch_timer: include clocksource.h directly
This driver makes use of the clocksource code. Previously it had only
included the proper header indirectly, but that chain was inadvertently
broken by 74d23cc "time: move the timecounter/cyclecounter code into its
own file."

This patch fixes the issue by including clocksource.h directly.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 13:18:50 -05:00
Hariprasad Shenai 678109ea09 cxgb4: Add PCI device ID for new T5 adapter
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-06 13:15:15 -05:00
Oded Gabbay 76baee6c73 drm/amdkfd: rewrite kfd_ioctl() according to drm_ioctl()
This patch changes kfd_ioctl() to be very similar to drm_ioctl().

The patch defines an array of amdkfd_ioctls, which maps IOCTL definition to the
ioctl function.

The kfd_ioctl() uses that mapping to call the appropriate ioctl function,
through a function pointer.

This patch also declares a new typedef for the ioctl function pointer.

v2: Renamed KFD_COMMAND_(START|END) to AMDKFD_...

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
2015-01-06 19:44:36 +02:00
Oded Gabbay b81c55db10 drm/amdkfd: reformat IOCTL definitions to drm-style
This patch reformats the ioctl definitions in kfd_ioctl.h to be similar to the
drm ioctls definition style.

v2: Renamed KFD_COMMAND_(START|END) to AMDKFD_...

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
2015-01-06 19:44:36 +02:00
Oded Gabbay 524a640444 drm/amdkfd: Do copy_to/from_user in general kfd_ioctl()
This patch moves the copy_to_user() and copy_from_user() calls from the
different ioctl functions in amdkfd to the general kfd_ioctl() function, as
this is a common code for all ioctls.

This was done according to example taken from drm_ioctl.c

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
2015-01-06 19:44:26 +02:00
Amitkumar Karwar 1c6098eb2b bluetooth: btmrvl: increase the priority of firmware download message
When driver is loaded, it is important to know if FW was already
active or it is freshly downloaded. This patch increases the
priority of the message.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-01-06 16:19:36 +01:00
Amitkumar Karwar 7b4b8740c6 Bluetooth: btmrvl: add surprise_removed flag
This flag will be set in unload path to make sure that we skip
sending further commands, ignore interrupts and stop main thread
when unload starts.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-01-06 16:19:35 +01:00
Amitkumar Karwar 9b89fdfee4 Bluetooth: btmrvl: error path handling in setup handler
If module init command fails, FW might not be in good state.
We will return from setup handler and skip downloading further
commands.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-01-06 16:19:35 +01:00
Amitkumar Karwar 8b324fa691 Bluetooth: btmrvl: fix race issue while stopping main thread
btmrvl_remove_card() calls kthread_stop() to stop the main thread,
but kthread_should_stop() is checked when all the activities are done
in the main thread before sleeping.
We will have kthread_should_stop() check as soon as main thread is
woken up. This fixes a crash issue caused due to an invalid memory
access while unnecessarily processing interrupts after card removal.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-01-06 16:19:35 +01:00
Michael S. Tsirkin a1eb03f546 virtio_pci: document why we defer kfree
The reason we defer kfree until release function is because it's a
general rule for kobjects: kfree of the reference counter itself is only
legal in the release function.

Previous patch didn't make this clear, document this in code.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-01-06 16:35:36 +02:00
Sasha Levin 63bd62a08c virtio_pci: defer kfree until release callback
A struct device which has just been unregistered can live on past the
point at which a driver decides to drop it's initial reference to the
kobject gained on allocation.

This implies that when releasing a virtio device, we can't free a struct
virtio_device until the underlying struct device has been released,
which might not happen immediately on device_unregister().

Unfortunately, this is exactly what virtio pci does:
it has an empty release callback, and frees memory immediately
after unregistering the device.

This causes an easy to reproduce crash if CONFIG_DEBUG_KOBJECT_RELEASE
it enabled.

To fix, free the memory only once we know the device is gone in the release
callback.

Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-01-06 16:35:36 +02:00
Michael S. Tsirkin 945399a8c7 virtio_pci: device-specific release callback
It turns out we need to add device-specific code
in release callback. Move it to virtio_pci_legacy.c.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-01-06 16:35:36 +02:00
Michael S. Tsirkin 80e9541f79 virtio: make del_vqs idempotent
Our code calls del_vqs multiple times, assuming
it's idempotent.

commit 3ec7a77bb3
    virtio_pci: free up vq->priv
broke this assumption, by adding kfree there,
so multiple calls cause double free.

Fix it up.

Fixes: 3ec7a77bb3
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-01-06 16:35:35 +02:00
Arik Nemtsov fa44b988d2 mac80211: skip disabled channels in VHT check
The patch "40a11ca mac80211: check if channels allow 80 MHz for VHT
probe requests" considered disabled channels as VHT enabled, and
mistakenly sent out probe-requests with the VHT IE.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-06 14:59:07 +01:00
Johannes Berg 71b836eca7 nl80211: define multicast group names in header
Put the group names into the userspace API header file so that
userspace clients can use symbolic names from there instead of
hardcoding the actual names. This doesn't really change much,
but seems somewhat cleaner.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-06 12:10:26 +01:00
Gautam Kumar Shukla d75bb06b61 cfg80211: add extensible feature flag attribute
With the wiphy::features flag being used up this patch adds a
new field wiphy::ext_features. Considering extensibility this
new field is declared as a byte array. This extensible flag is
exposed to user-space by NL80211_ATTR_EXT_FEATURES.

Cc: Avinash Patil <patila@marvell.com>
Signed-off-by: Gautam (Gautam Kumar) Shukla <gautams@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-01-06 12:10:24 +01:00
Linus Lüssing 9d31b3ce81 batman-adv: fix potential TT client + orig-node memory leak
This patch fixes a potential memory leak which can occur once an
originator times out. On timeout the according global translation table
entry might not get purged correctly. Furthermore, the non purged TT
entry will cause its orig-node to leak, too. Which additionally can lead
to the new multicast optimization feature not kicking in because of a
therefore bogus counter.

In detail: The batadv_tt_global_entry->orig_list holds the reference to
the orig-node. Usually this reference is released after
BATADV_PURGE_TIMEOUT through: _batadv_purge_orig()->
batadv_purge_orig_node()->batadv_update_route()->_batadv_update_route()->
batadv_tt_global_del_orig() which purges this global tt entry and
releases the reference to the orig-node.

However, if between two batadv_purge_orig_node() calls the orig-node
timeout grew to 2*BATADV_PURGE_TIMEOUT then this call path isn't
reached. Instead the according orig-node is removed from the
originator hash in _batadv_purge_orig(), the batadv_update_route()
part is skipped and won't be reached anymore.

Fixing the issue by moving batadv_tt_global_del_orig() out of the rcu
callback.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Acked-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-01-06 11:07:01 +01:00
Linus Lüssing a5164886b0 batman-adv: fix multicast counter when purging originators
When purging an orig_node we should only decrease counter tracking the
number of nodes without multicast optimizations support if it was
increased through this orig_node before.

A not yet quite initialized orig_node (meaning it did not have its turn
in the mcast-tvlv handler so far) which gets purged would not adhere to
this and will lead to a counter imbalance.

Fixing this by adding a check whether the orig_node is mcast-initalized
before decreasing the counter in the mcast-orig_node-purging routine.

Introduced by 60432d756c
("batman-adv: Announce new capability via multicast TVLV")

Reported-by: Tobias Hachmer <tobias@hachmer.de>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-01-06 11:06:04 +01:00
Linus Lüssing e8829f007e batman-adv: fix counter for multicast supporting nodes
A miscounting of nodes having multicast optimizations enabled can lead
to multicast packet loss in the following scenario:

If the first OGM a node receives from another one has no multicast
optimizations support (no multicast tvlv) then we are missing to
increase the counter. This potentially leads to the wrong assumption
that we could safely use multicast optimizations.

Fixings this by increasing the counter if the initial OGM has the
multicast TVLV unset, too.

Introduced by 60432d756c
("batman-adv: Announce new capability via multicast TVLV")

Reported-by: Tobias Hachmer <tobias@hachmer.de>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-01-06 11:05:42 +01:00
Martin Hundebøll f44d54077a batman-adv: fix lock class for decoding hash in network-coding.c
batadv_has_set_lock_class() is called with the wrong hash table as first
argument (probably due to a copy-paste error), which leads to false
positives when running with lockdep.

Introduced-by: 612d2b4fe0
("batman-adv: network coding - save overheard and tx packets for decoding")

Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-01-06 11:05:12 +01:00
Linus Lüssing 2c667a339c batman-adv: fix delayed foreign originator recognition
Currently it can happen that the reception of an OGM from a new
originator is not being accepted. More precisely it can happen that
an originator struct gets allocated and initialized
(batadv_orig_node_new()), even the TQ gets calculated and set correctly
(batadv_iv_ogm_calc_tq()) but still the periodic orig_node purging
thread will decide to delete it if it has a chance to jump between
these two function calls.

This is because batadv_orig_node_new() initializes the last_seen value
to zero and its caller (batadv_iv_ogm_orig_get()) makes it visible to
other threads by adding it to the hash table already.
batadv_iv_ogm_calc_tq() will set the last_seen variable to the correct,
current time a few lines later but if the purging thread jumps in between
that it will think that the orig_node timed out and will wrongly
schedule it for deletion already.

If the purging interval is the same as the originator interval (which is
the default: 1 second), then this game can continue for several rounds
until the random OGM jitter added enough difference between these
two (in tests, two to about four rounds seemed common).

Fixing this by initializing the last_seen variable of an orig_node
to the current time before adding it to the hash table.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-01-06 11:05:09 +01:00
Simon Wunderlich 329887ad13 batman-adv: fix and simplify condition when bonding should be used
The current condition actually does NOT consider bonding when the
interface the packet came in from is the soft interface, which is the
opposite of what it should do (and the comment describes). Fix that and
slightly simplify the condition.

Reported-by: Ray Gibson <booray@gmail.com>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
2015-01-06 11:05:07 +01:00
David S. Miller a918eb9fac Merge branch 'rt_cong_ctrl'
Daniel Borkmann says:

====================
net: allow setting congctl via routing table

This is the second part of our work and allows for setting the congestion
control algorithm via routing table. For details, please see individual
patches.

Since patch 1 is a bug fix, we suggest applying patch 1 to net, and then
merging net into net-next, for example, and following up with the remaining
feature patches wrt dependencies.

Joint work with Florian Westphal, suggested by Hannes Frederic Sowa.

Patch for iproute2 is available under [1], but will be reposted with along
with the man-page update when this set hits net-next.

  [1] http://patchwork.ozlabs.org/patch/418149/

Thanks!

v2 -> v3:
 - Added module auto-loading as suggested by David Miller, thanks!
  - Added patch 2 for handling possible sleeps in fib6
  - While working on this, we discovered a bug, hence fix in patch 1
  - Added auto-loading to patch 4
 - Rebased, retested, rest the same.
v1 -> v2:
 - Very sorry, I noticed I had decnet disabled during testing.
   Added missing header include in decnet, rest as is.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-05 22:55:28 -05:00
Daniel Borkmann 81164413ad net: tcp: add per route congestion control
This work adds the possibility to define a per route/destination
congestion control algorithm. Generally, this opens up the possibility
for a machine with different links to enforce specific congestion
control algorithms with optimal strategies for each of them based
on their network characteristics, even transparently for a single
application listening on all links.

For our specific use case, this additionally facilitates deployment
of DCTCP, for example, applications can easily serve internal
traffic/dsts in DCTCP and external one with CUBIC. Other scenarios
would also allow for utilizing e.g. long living, low priority
background flows for certain destinations/routes while still being
able for normal traffic to utilize the default congestion control
algorithm. We also thought about a per netns setting (where different
defaults are possible), but given its actually a link specific
property, we argue that a per route/destination setting is the most
natural and flexible.

The administrator can utilize this through ip-route(8) by appending
"congctl [lock] <name>", where <name> denotes the name of a
congestion control algorithm and the optional lock parameter allows
to enforce the given algorithm so that applications in user space
would not be allowed to overwrite that algorithm for that destination.

The dst metric lookups are being done when a dst entry is already
available in order to avoid a costly lookup and still before the
algorithms are being initialized, thus overhead is very low when the
feature is not being used. While the client side would need to drop
the current reference on the module, on server side this can actually
even be avoided as we just got a flat-copied socket clone.

Joint work with Florian Westphal.

Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-05 22:55:24 -05:00
Daniel Borkmann ea69763999 net: tcp: add RTAX_CC_ALGO fib handling
This patch adds the minimum necessary for the RTAX_CC_ALGO congestion
control metric to be set up and dumped back to user space.

While the internal representation of RTAX_CC_ALGO is handled as a u32
key, we avoided to expose this implementation detail to user space, thus
instead, we chose the netlink attribute that is being exchanged between
user space to be the actual congestion control algorithm name, similarly
as in the setsockopt(2) API in order to allow for maximum flexibility,
even for 3rd party modules.

It is a bit unfortunate that RTAX_QUICKACK used up a whole RTAX slot as
it should have been stored in RTAX_FEATURES instead, we first thought
about reusing it for the congestion control key, but it brings more
complications and/or confusion than worth it.

Joint work with Florian Westphal.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-05 22:55:24 -05:00