Commit graph

506412 commits

Author SHA1 Message Date
Vaishali Thakkar
6753a971be net: 8390: axnet_cs: Use setup_timer and mod_timer
Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:23 -05:00
Vaishali Thakkar
fc4ba63627 net: 8390: pcnet_cs: Use setup_timer and mod_timer
Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:22 -05:00
Vaishali Thakkar
b8b01344eb net: smc91c92_cs: Use setup_timer and mod_timer
Use timer API functions setup_timer and mod_timer instead
of structure assignments as they are standard way to set
the timer and to update the expire field of an active timer
respectively.

This is done using Coccinelle and semantic patch used for
this is as follows:

// <smpl>
@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);
// </smpl>

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:22 -05:00
Yannick Guerrini
f7c3068805 netxen_nic: Fix trivial typos in comments
Change 'mutliple' to 'multiple'
Change 'Firmare' to 'Firmware'

Signed-off-by: Yannick Guerrini <yguerrini@tomshardware.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:22 -05:00
Yannick Guerrini
00c7eb99a5 qlcnic: Fix trivial typo in comment
Change 'Firmare' to 'Firmware'

Signed-off-by: Yannick Guerrini <yguerrini@tomshardware.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:22 -05:00
Grygorii Strashko
8963a50453 net: ti: cpsw: add hibernation callbacks
Setting a dev_pm_ops suspend/resume pair but not a set of
hibernation functions means those pm functions will not be
called upon hibernation.
Fix this by using SIMPLE_DEV_PM_OPS, which appropriately
assigns the suspend and hibernation handlers and move
cpsw_suspend/resume calbacks under CONFIG_PM_SLEEP
to avoid build warnings.

Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:22 -05:00
Grygorii Strashko
2f5c54ce0d net: davinci_mdio: add hibernation callbacks
Setting a dev_pm_ops suspend_late/resume_early pair but not a
set of hibernation functions means those pm functions will
not be called upon hibernation.
Fix this by using SET_LATE_SYSTEM_SLEEP_PM_OPS, which appropriately
assigns the suspend and hibernation handlers and move
davinci_mdio_x callbacks under CONFIG_PM_SLEEP to avoid build warnings.

Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 13:40:22 -05:00
Ingo Molnar
021f5f12f2 perf/urgent fixes:
Infrastructure:
 
 - pthread_attr_setaffinity_np feature detection build fixes (Adrian Hunter, Josh Boyer)
 
 - Fix probing for PERF_FLAG_FD_CLOEXEC flag (Adrian Hunter)
 
 - Fix order of arguments to memcpy_alloc_mem in 'perf bench' (Bruce Merry)
 
 - Sparc64 and Aarch64 build and segfault fixes (David Ahern)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

  - pthread_attr_setaffinity_np() feature detection build fixes (Adrian Hunter, Josh Boyer)

  - Fix probing for PERF_FLAG_FD_CLOEXEC flag (Adrian Hunter)

  - Fix order of arguments to memcpy_alloc_mem in 'perf bench' (Bruce Merry)

  - Sparc64 and Aarch64 build and segfault fixes (David Ahern)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-01 17:41:42 +01:00
Emmanuel Grumbach
7e1223b500 iwlwifi: mvm: new Alive / error table API
The new API slightly changes the layout of the version of
the firmware - prepare for that.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:12 +02:00
Johannes Berg
33cef92563 iwlwifi: mvm: support beacon statistics for BSS client
Report the average beacon signal and the number of received beacons as
measured by the firmware.

Since the firmware just counts, and doesn't reset the counter at all,
clear it in the firmware whenever we associate. However, accumulate it
over firmware restart.

Since clearing the statistics in the firmware will also clear the ones
for the radio statistics, add those to the accumulator when cleared.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:11 +02:00
Eran Harary
3c118cdb9c iwlwifi: mvm: don't write to DBGC_OUT_CTRL when stopping the recording
Due to HW bug in the DBGC when driver want to stop the dbg recording it
should wait 100us before collecting the data instead of write 0 to
DBGC_OUT_CTRL.

Signed-off-by: Eran Harary <eran.harary@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:11 +02:00
Luciano Coelho
1f9403863c iwlwifi: mvm: remove deprecated scan API code
The legacy scan API is deprecated and not used anymore with 10 and
higher firmware versions.  Since we deprecated firmware version 9, we
can remove a whole lot of unused code.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:10 +02:00
Luciano Coelho
1e2c24f0f1 iwlwifi: deprecate -9.ucode for 3160 / 7260 / 7265
This firmware is not supported anymore.  Stop loading this firmware.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:09 +02:00
Johannes Berg
91a8bcde2e iwlwifi: mvm: support radio statistics as global survey
Export the radio statistics from the statistics v10 API (if the
firmware also has the capability to fill these statistics) using
the global survey data facility.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:09 +02:00
Johannes Berg
777c9b6bba iwlwifi: mvm: add statistics API version 10
New firmware versions will report statistics using a new version 10
of the API, instead of the current version 8. Add support for this.
This enables getting beacon and radio statistics.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:08 +02:00
Emmanuel Grumbach
a2227ce2a3 iwlwifi: pcie: apply destination before releasing reset
This allows to use the firmware debugging system even when
the configuration values are set hard coded in the firmware.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:08 +02:00
Eyal Shapira
295ca6d3ed iwlwifi: mvm: remove unused function in BT coex
Cleanup unused code.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:07 +02:00
Eyal Shapira
afcee962b0 iwlwifi: mvm: fix BT coex shared antenna activity check
The shared antenna should be forbidden to use only if there's
high BT activity. Comparing to BT_OFF was effectively causing
us to always forbid using the shared antenna for SISO. This
leads to degraded performance in scenarios where the shared
antenna would have better performance.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:07 +02:00
Eyal Shapira
16c426ff9e iwlwifi: mvm: rs: print single stream params via debugfs
Add this to the info printed when reading rate_scale_table.
Useful for debugging.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:06 +02:00
Eyal Shapira
878985ce7e iwlwifi: mvm: rs: avoid ss_force from being reset after tx idle
ss_force is a debugging option to force a certain single stream
tx mode. It's not useful if it gets reset after tx idle. Fix that.
While at it also make sure any code touching ss_force will only
get compiled if debugfs support is configured.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:05 +02:00
Eran Harary
e717c16676 iwlwifi: mvm: increase the number of PAPD channel groups to 9
Newer devices have more PAPD channel groups.

Signed-off-by: Eran Harary <eran.harary@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:05 +02:00
Arik Nemtsov
51ec09af2d iwlwifi: mvm: consider TDLS queues as used during drain
When a TDLS station is being drained its Tx queues are still in use. Don't
allocate them to a different station in the meantime.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:04 +02:00
Eyal Shapira
7ac4a50a7c iwlwifi: mvm: rs: disable MIMO for low latency P2P
Due to issues with Miracast adapters MIMO reception disable
use of MIMO when for low latency P2P traffic.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:04 +02:00
Eyal Shapira
ba69d0e362 iwlwifi: mvm: rs: adapt rate matching to new STBC/BFER
Once the FW supports autonomous decision between STBC/BFER/SISO
we no longer set the STBC bit and ANT_AB in the rate table.
However the FW rate in the tx response will have the STBC
or BFER bit set and the antennas set to ANT_AB in case these
were chosen by it. This will cause us to discard any such
response as unmatching the current LQ table and thus break
the rs search cycle completely.
Fix this by relaxing the rate matching in case we're working
with the new API and STBC/BFER are used.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:55:03 +02:00
Eyal Shapira
0b8d17f303 iwlwifi: mvm: rs: fix BT Coex check to look at the correct ant
The check to avoid the shared antenna was passed the wrong
antenna parameter. It should have checked whether the antenna of
the next column we're considering is allowed and instead it was
passed the current antenna.
This could lead to a wrong choice of the next column in the rs
algorithm and non optimal performance.

Fixes: commit 219fb66b49 ("iwlwifi: mvm: rs - don't use the shared antenna when BT load is high")
Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2015-03-01 16:54:51 +02:00
Sebastian Andrzej Siewior
9d3e2d02f5 locking/rtmutex: Set state back to running on error
The "usual" path is:

 - rt_mutex_slowlock()
 - set_current_state()
 - task_blocks_on_rt_mutex() (ret 0)
 - __rt_mutex_slowlock()
   - sleep or not but do return with __set_current_state(TASK_RUNNING)
 - back to caller.

In the early error case where task_blocks_on_rt_mutex() return
-EDEADLK we never change the task's state back to RUNNING. I
assume this is intended. Without this change after ww_mutex
using rt_mutex the selftest passes but later I get plenty of:

  | bad: scheduling from the idle thread!

backtraces.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: afffc6c180 ("locking/rtmutex: Optimize setting task running after being blocked")
Link: http://lkml.kernel.org/r/1425056229-22326-4-git-send-email-bigeasy@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-01 09:45:06 +01:00
Eric Dumazet
cac5e65e8a net: do not use rcu in rtnl_dump_ifinfo()
We did a failed attempt in the past to only use rcu in rtnl dump
operations (commit e67f88dd12 "net: dont hold rtnl mutex during
netlink dump callbacks")

Now that dumps are holding RTNL anyway, there is no need to also
use rcu locking, as it forbids any scheduling ability, like
GFP_KERNEL allocations that controlling path should use instead
of GFP_ATOMIC whenever possible.

This should fix following splat Cong Wang reported :

 [ INFO: suspicious RCU usage. ]
 3.19.0+ #805 Tainted: G        W

 include/linux/rcupdate.h:538 Illegal context switch in RCU read-side critical section!

 other info that might help us debug this:

 rcu_scheduler_active = 1, debug_locks = 0
 2 locks held by ip/771:
  #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8182b8f4>] netlink_dump+0x21/0x26c
  #1:  (rcu_read_lock){......}, at: [<ffffffff817d785b>] rcu_read_lock+0x0/0x6e

 stack backtrace:
 CPU: 3 PID: 771 Comm: ip Tainted: G        W       3.19.0+ #805
 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
  0000000000000001 ffff8800d51e7718 ffffffff81a27457 0000000029e729e6
  ffff8800d6108000 ffff8800d51e7748 ffffffff810b539b ffffffff820013dd
  00000000000001c8 0000000000000000 ffff8800d7448088 ffff8800d51e7758
 Call Trace:
  [<ffffffff81a27457>] dump_stack+0x4c/0x65
  [<ffffffff810b539b>] lockdep_rcu_suspicious+0x107/0x110
  [<ffffffff8109796f>] rcu_preempt_sleep_check+0x45/0x47
  [<ffffffff8109e457>] ___might_sleep+0x1d/0x1cb
  [<ffffffff8109e67d>] __might_sleep+0x78/0x80
  [<ffffffff814b9b1f>] idr_alloc+0x45/0xd1
  [<ffffffff810cb7ab>] ? rcu_read_lock_held+0x3b/0x3d
  [<ffffffff814b9f9d>] ? idr_for_each+0x53/0x101
  [<ffffffff817c1383>] alloc_netid+0x61/0x69
  [<ffffffff817c14c3>] __peernet2id+0x79/0x8d
  [<ffffffff817c1ab7>] peernet2id+0x13/0x1f
  [<ffffffff817d8673>] rtnl_fill_ifinfo+0xa8d/0xc20
  [<ffffffff810b17d9>] ? __lock_is_held+0x39/0x52
  [<ffffffff817d894f>] rtnl_dump_ifinfo+0x149/0x213
  [<ffffffff8182b9c2>] netlink_dump+0xef/0x26c
  [<ffffffff8182bcba>] netlink_recvmsg+0x17b/0x2c5
  [<ffffffff817b0adc>] __sock_recvmsg+0x4e/0x59
  [<ffffffff817b1b40>] sock_recvmsg+0x3f/0x51
  [<ffffffff817b1f9a>] ___sys_recvmsg+0xf6/0x1d9
  [<ffffffff8115dc67>] ? handle_pte_fault+0x6e1/0xd3d
  [<ffffffff8100a3a0>] ? native_sched_clock+0x35/0x37
  [<ffffffff8109f45b>] ? sched_clock_local+0x12/0x72
  [<ffffffff8109f6ac>] ? sched_clock_cpu+0x9e/0xb7
  [<ffffffff810cb7ab>] ? rcu_read_lock_held+0x3b/0x3d
  [<ffffffff811abde8>] ? __fcheck_files+0x4c/0x58
  [<ffffffff811ac556>] ? __fget_light+0x2d/0x52
  [<ffffffff817b376f>] __sys_recvmsg+0x42/0x60
  [<ffffffff817b379f>] SyS_recvmsg+0x12/0x1c

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 0c7aecd4bd ("netns: add rtnl cmd to add and get peer netns ids")
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 00:07:00 -05:00
Geert Uytterhoeven
a14c7d15ca sh_eth: Fix lost MAC address on kexec
Commit 740c7f31c0 ("sh_eth: Ensure DMA engines are stopped before
freeing buffers") added a call to sh_eth_reset() to the
sh_eth_set_ringparam() and sh_eth_close() paths.

However, setting the software reset bit(s) in the EDMR register resets
the MAC Address Registers to zero. Hence after kexec, the new kernel
doesn't detect a valid MAC address and assigns a random MAC address,
breaking DHCP.

Set the MAC address again after the reset in sh_eth_dev_exit() to fix
this.

Tested on r8a7740/armadillo (GETHER) and r8a7791/koelsch (FAST_RCAR).

Fixes: 740c7f31c0 ("sh_eth: Ensure DMA engines are stopped before freeing buffers")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-01 00:06:20 -05:00
Jaedon Shin
4092e6acf5 net: bcmgenet: fix throughtput regression
This patch adds bcmgenet_tx_poll for the tx_rings. This can reduce the
interrupt load and send xmit in network stack on time. This also
separated for the completion of tx_ring16 from bcmgenet_poll.

The bcmgenet_tx_reclaim of tx_ring[{0,1,2,3}] operative by an interrupt
is to be not more than a certain number TxBDs. It is caused by too
slowly reclaiming the transmitted skb. Therefore, performance
degradation of xmit after 605ad7f ("tcp: refine TSO autosizing").

Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:58:33 -05:00
Eric Dumazet
2f1d8b9e8a macvtap: make sure neighbour code can push ethernet header
Brian reported crashes using IPv6 traffic with macvtap/veth combo.

I tracked the crashes in neigh_hh_output()

-> memcpy(skb->data - HH_DATA_MOD, hh->hh_data, HH_DATA_MOD);

Neighbour code assumes headroom to push Ethernet header is
at least 16 bytes.

It appears macvtap has only 14 bytes available on arches
where NET_IP_ALIGN is 0 (like x86)

Effect is a corruption of 2 bytes right before skb->head,
and possible crashes if accessing non existing memory.

This fix should also increase IPv4 performance, as paranoid code
in ip_finish_output2() wont have to call skb_realloc_headroom()

Reported-by: Brian Rak <brak@vultr.com>
Tested-by: Brian Rak <brak@vultr.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:57:19 -05:00
David S. Miller
b656cc64cf Merge branch 's390-next'
Ursula Braun says:

====================
s390: network patches for net-next

here are some s390 related patches for net-next
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:39:05 -05:00
Ursula Braun
8b7ac017aa MAINTAINERS: update S390 NETWORK DRIVERS maintainer
remove Frank Blaschka as S390 NETWORK DRIVERS maintainer

Acked-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:38:29 -05:00
Stefan Raspl
ca5b20ace8 qeth: Fix command sizes
This patch adjusts two instances where we were using the (too big)
struct qeth_ipacmd_setadpparms size instead of the commands' actual
size. This didn't do any harm, but wasted a few bytes.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:38:29 -05:00
Ursula Braun
83650a2edc s390: remove claw driver
claw devices are outdated and no longer supported.
This patch removes the claw driver.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:38:29 -05:00
David S. Miller
32034e0580 A few patches have accumulated, among them the fix for Linus's
four-way-handshake problem. The others are various small fixes
 for problems all over, nothing really stands out.
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Merge tag 'mac80211-for-davem-2015-02-27' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
A few patches have accumulated, among them the fix for Linus's
four-way-handshake problem. The others are various small fixes
for problems all over, nothing really stands out.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 23:33:53 -05:00
Eric Dumazet
74abc20ced tcp: cleanup static functions
tcp_fastopen_create_child() is static and should not be exported.

tcp4_gso_segment() and tcp6_gso_segment() should be static.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 16:56:51 -05:00
Andrew Schwartzmeyer
59995370db hyperv: Implement netvsc_get_channels() ethool op
This adds support for reporting the actual and maximum combined channels
count of the hv_netvsc driver via 'ethtool --show-channels'.

This required adding 'max_chn' to 'struct netvsc_device', and assigning
it 'rsscap.num_recv_que' in 'rndis_filter_device_add'. Now we can access
the combined maximum channel count via 'struct netvsc_device' in the
ethtool callback.

Signed-off-by: Andrew Schwartzmeyer <andrew@schwartzmeyer.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 16:51:36 -05:00
Eric W. Biederman
06615bed60 net: Verify permission to link_net in newlink
When applicable verify that the caller has permisson to the underlying
network namespace for a newly created network device.

Similary checks exist for the network namespace a network device will
be created in.

Fixes: 317f4810e4 ("rtnl: allow to create device with IFLA_LINK_NETNSID set")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 15:14:44 -05:00
Eric W. Biederman
505ce4154a net: Verify permission to dest_net in newlink
When applicable verify that the caller has permision to create a
network device in another network namespace.  This check is already
present when moving a network device between network namespaces in
setlink so all that is needed is to duplicate that check in newlink.

This change almost backports cleanly, but there are context conflicts
as the code that follows was added in v4.0-rc1

Fixes: b51642f6d7 net: Enable a userns root rtnl calls that are safe for unprivilged users
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 15:14:44 -05:00
David S. Miller
f9c7ce1853 Merge branch 'tcp-tso'
Eric Dumazet says:

====================
tcp: tso improvements

This patch serie reworks tcp_tso_should_defer() a bit
to get less bursts, and better ECN behavior.

We also removed tso_deferred field in tcp socket.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 15:10:47 -05:00
Eric Dumazet
a0ea700e40 tcp: tso: allow CA_CWR state in tcp_tso_should_defer()
Another TCP issue is triggered by ECN.

Under pressure, receiver gets ECN marks, and send back ACK packets
with ECE TCP flag. Senders enter CA_CWR state.

In this state, tcp_tso_should_defer() is short cut :

if (icsk->icsk_ca_state != TCP_CA_Open)
    goto send_now;

This means that about all ACK packets we receive are triggering
a partial send, and because cwnd is kept small, we can only send
a small amount of data for each incoming ACK,
which in return generate more ACK packets.

Allowing CA_Open and CA_CWR states to enable TSO defer in
tcp_tso_should_defer() brings performance back :
TSO autodefer has more chance to defer under pressure.

This patch increases TSO and LRO/GRO efficiency back to normal levels,
and does not impact overall ECN behavior.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 15:10:39 -05:00
Eric Dumazet
50c8339e92 tcp: tso: restore IW10 after TSO autosizing
With sysctl_tcp_min_tso_segs being 4, it is very possible
that tcp_tso_should_defer() decides not sending last 2 MSS
of initial window of 10 packets. This also applies if
autosizing decides to send X MSS per GSO packet, and cwnd
is not a multiple of X.

This patch implements an heuristic based on age of first
skb in write queue : If it was sent very recently (less than half srtt),
we can predict that no ACK packet will come in less than half rtt,
so deferring might cause an under utilization of our window.

This is visible on initial send (IW10) on web servers,
but more generally on some RPC, as the last part of the message
might need an extra RTT to get delivered.

Tested:

Ran following packetdrill test
// A simple server-side test that sends exactly an initial window (IW10)
// worth of packets.

`sysctl -e -q net.ipv4.tcp_min_tso_segs=4`

0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0    setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0    bind(3, ..., ...) = 0
+0    listen(3, 1) = 0

+.1   < S 0:0(0) win 32792 <mss 1460,sackOK,nop,nop,nop,wscale 7>
+0    > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 6>
+.1   < . 1:1(0) ack 1 win 257
+0    accept(3, ..., ...) = 4

+0    write(4, ..., 14600) = 14600
+0    > . 1:5841(5840) ack 1 win 457
+0    > . 5841:11681(5840) ack 1 win 457
// Following packet should be sent right now.
+0    > P. 11681:14601(2920) ack 1 win 457

+.1   < . 1:1(0) ack 14601 win 257

+0    close(4) = 0
+0    > F. 14601:14601(0) ack 1
+.1   < F. 1:1(0) ack 14602 win 257
+0    > . 14602:14602(0) ack 2

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 15:10:39 -05:00
Eric Dumazet
5f852eb536 tcp: tso: remove tp->tso_deferred
TSO relies on ability to defer sending a small amount of packets.
Heuristic is to wait for future ACKS in hope to send more packets at once.
Current algorithm uses a per socket tso_deferred field as a pseudo timer.

This pseudo timer relies on future ACK, but there is no guarantee
we receive them in time.

Fix would be to use a real timer, but cost of such timer is probably too
expensive for typical cases.

This patch changes the logic to test the time of last transmit,
because we should not add bursts of more than 1ms for any given flow.

We've used this patch for about two years at Google, before FQ/pacing
as it would reduce a fair amount of bursts.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 15:10:39 -05:00
George McCollister
5688714977 drivers: net: cpsw: Set SECURE for dual_emac ucast
Prior to this patch, sending a packet with the source MAC address of one
of the CPSW interfaces to one of the CPSW slave ports while it's configured in
dual_emac mode would update the port_num field of the VLAN/Unicast Address
Table Entry. This would cause it to discard all incoming traffic addressed to
that MAC address, essentially rendering the port useless until the ALE table is
cleared (by starting and stopping the interface or rebooting.)

For example, if eth0 has a MAC address of 90:59:af:8f:43:e9 it will have
an ALE table entry:

00 00 00 00 59 90 02 30 e9 43 8f af
(VLAN Addr vlan_id=2 unicast type=0 port_num=0 addr=90:59:af:8f:43:e9)

If you configure another device with the same MAC address and connect it
to the first CPSW slave port and send some traffic the ALE table entry
becomes:

04 00 00 00 59 90 02 30 e9 43 8f af
(VLAN Addr vlan_id=2 unicast type=0 port_num=1 addr=90:59:af:8f:43:e9)

>From this point forward all incoming traffic addressed to
90:59:af:8f:43:e9 will be dropped.

Setting the SECURE bit for the VLAN/Unicast address table entry for each
interface's MAC address corrects the problem.

Signed-off-by: George McCollister <george.mccollister@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 14:49:31 -05:00
Ben Hutchings
6588af614e usbnet: Fix tx_packets stat for FLAG_MULTI_FRAME drivers
Currently the usbnet core does not update the tx_packets statistic for
drivers with FLAG_MULTI_PACKET and there is no hook in the TX
completion path where they could do this.

cdc_ncm and dependent drivers are bumping tx_packets stat on the
transmit path while asix and sr9800 aren't updating it at all.

Add a packet count in struct skb_data so these drivers can fill it
in, initialise it to 1 for other drivers, and add the packet count
to the tx_packets statistic on completion.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 14:27:21 -05:00
Linus Torvalds
ae1aa797e0 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Just general fixes: radeon, i915, atmel, tegra, amdkfd and one core
  fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (28 commits)
  drm: atmel-hlcdc: remove clock polarity from crtc driver
  drm/radeon: only enable DP audio if the monitor supports it
  drm/radeon: fix atom aux payload size check for writes (v2)
  drm/radeon: fix 1 RB harvest config setup for TN/RL
  drm/radeon: enable SRBM timeout interrupt on EG/NI
  drm/radeon: enable SRBM timeout interrupt on SI
  drm/radeon: enable SRBM timeout interrupt on CIK v2
  drm/radeon: dump full IB if we hit a packet error
  drm/radeon: disable mclk switching with 120hz+ monitors
  drm/radeon: use drm_mode_vrefresh() rather than mode->vrefresh
  drm/radeon: enable native backlight control on old macs
  drm/i915: Fix frontbuffer false positve.
  drm/i915: Align initial plane backing objects correctly
  drm/i915: avoid processing spurious/shared interrupts in low-power states
  drm/i915: Check obj->vma_list under the struct_mutex
  drm/i915: Fix a use after free, and unbalanced refcounting
  drm: atmel-hlcdc: remove useless pm_runtime_put_sync in probe
  drm: atmel-hlcdc: reset layer A2Q and UPDATE bits when disabling it
  drm: Fix deadlock due to getconnector locking changes
  drm/i915: Dell Chromebook 11 has PWM backlight
  ...
2015-02-28 10:36:48 -08:00
Linus Torvalds
a015d33c98 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe:
 "Two smaller fixes for this cycle:

   - A fixup from Keith so that NVMe compiles without BLK_INTEGRITY,
     basically just moving the code around appropriately.

   - A fixup for shm, fixing an oops in shmem_mapping() for mapping with
     no inode.  From Sasha"

[ The shmem fix doesn't look block-layer-related, but fixes a bug that
  happened due to the backing_dev_info removal..  - Linus ]

* 'for-linus' of git://git.kernel.dk/linux-block:
  mm: shmem: check for mapping owner before dereferencing
  NVMe: Fix for BLK_DEV_INTEGRITY not set
2015-02-28 10:21:57 -08:00
Linus Torvalds
2aaeb784bf xfs: fixes for v4.0-rc2
This update contains:
 o ensure quota type is reset in on-disk dquots
 o fix missing partial EOF block data flush on truncate extension
 o fix transaction leak in error handling for new pnfs block layout
   support
 o add missing target_ip check to RENAME_EXCHANGE
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Merge tag 'xfs-for-linus-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

Pull xfs fixes from Dave Chinner:
 "These are fixes for regressions/bugs introduced in the 4.0 merge cycle
  and problems discovered during the merge window that need to be pushed
  back to stable kernels ASAP.

  This contains:
   - ensure quota type is reset in on-disk dquots
   - fix missing partial EOF block data flush on truncate extension
   - fix transaction leak in error handling for new pnfs block layout
     support
   - add missing target_ip check to RENAME_EXCHANGE"

* tag 'xfs-for-linus-4.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs:
  xfs: cancel failed transaction in xfs_fs_commit_blocks()
  xfs: Ensure we have target_ip for RENAME_EXCHANGE
  xfs: ensure truncate forces zeroed blocks to disk
  xfs: Fix quota type in quota structures when reusing quota file
2015-02-28 10:06:33 -08:00
Dan Carpenter
f55ea3d932 niu: fix error handling in niu_class_to_ethflow()
There is a discrepancy here because the niu_class_to_ethflow() returns
zero on failure and one on success but the caller expected zero on
success and negative on failure.

The problem means that we allow the user to pass classes and flow_types
which we don't want.  I've looked at it a bit and I don't see it as a
very serious bug.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-02-28 12:58:25 -05:00
Linus Torvalds
e9738946fc Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "13 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: add missing __PAGETABLE_{PUD,PMD}_FOLDED defines
  mm: page_alloc: revert inadvertent !__GFP_FS retry behavior change
  kernel/sys.c: fix UNAME26 for 4.0
  mm: memcontrol: use "max" instead of "infinity" in control knobs
  zram: use proper type to update max_used_pages
  drivers/rtc/rtc-ds1685.c: fix conditional in ds1685_rtc_sysfs_time_regs_{show,store}
  nilfs2: fix potential memory overrun on inode
  scripts/gdb: add empty package initialization script
  rtc: ds1685: remove superfluous checks for out-of-range u8 values
  rtc: ds1685: fix ds1685_rtc_alarm_irq_enable build error
  memcg: fix low limit calculation
  mm/nommu: fix memory leak
  ocfs2: update web page + git tree in documentation
2015-02-28 09:58:03 -08:00