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  1. 15 Jun, 2019 18 commits
    • Stephen Barber's avatar
      vsock/virtio: set SOCK_DONE on peer shutdown · 42f5cda5
      Stephen Barber authored 
      Set the SOCK_DONE flag to match the TCP_CLOSING state when a peer has
shut down and there is nothing left to read.

This fixes the following bug:
1) Peer sends SHUTDOWN(RDWR).
2) Socket enters TCP_CLOSING but SOCK_DONE is not set.
3) read() returns -ENOTCONN until close() is called, then returns 0.
Signed-off-by: default avatarStephen Barber <smbarber@chromium.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      42f5cda5
    • Linus Walleij's avatar
      net: dsa: rtl8366: Fix up VLAN filtering · 760c80b7
      Linus Walleij authored 
      We get this regression when using RTL8366RB as part of a bridge
with OpenWrt:

WARNING: CPU: 0 PID: 1347 at net/switchdev/switchdev.c:291
	 switchdev_port_attr_set_now+0x80/0xa4
lan0: Commit of attribute (id=7) failed.
(...)
realtek-smi switch lan0: failed to initialize vlan filtering on this port

This is because it is trying to disable VLAN filtering
on VLAN0, as we have forgot to add 1 to the port number
to get the right VLAN in rtl8366_vlan_filtering(): when
we initialize the VLAN we associate VLAN1 with port 0,
VLAN2 with port 1 etc, so we need to add 1 to the port
offset.

Fixes: d8652956 ("net: dsa: realtek-smi: Add Realtek SMI driver")
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      760c80b7
    • Ioana Ciornei's avatar
      net: phylink: set the autoneg state in phylink_phy_change · ef7bfa84
      Ioana Ciornei authored 
      The phy_state field of phylink should carry only valid information
especially when this can be passed to the .mac_config callback.
Update the an_enabled field with the autoneg state in the
phylink_phy_change function.

Fixes: 9525ae83 ("phylink: add phylink infrastructure")
Signed-off-by: default avatarIoana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ef7bfa84
    • David S. Miller's avatar
      Merge branch 'tcp-add-three-static-keys' · 35fc07ae
      David S. Miller authored 
      Eric Dumazet says:

====================
tcp: add three static keys

Recent addition of per TCP socket rx/tx cache brought
regressions for some workloads, as reported by Feng Tang.

It seems better to make them opt-in, before we adopt better
heuristics.

The last patch adds high_order_alloc_disable sysctl
to ask TCP sendmsg() to exclusively use order-0 allocations,
as mm layer has specific optimizations.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      35fc07ae
    • Eric Dumazet's avatar
      net: add high_order_alloc_disable sysctl/static key · ce27ec60
      Eric Dumazet authored 
      >From linux-3.7, (commit 5640f768 "net: use a per task frag
allocator") TCP sendmsg() has preferred using order-3 allocations.

While it gives good results for most cases, we had reports
that heavy uses of TCP over loopback were hitting a spinlock
contention in page allocations/freeing.

This commits adds a sysctl so that admins can opt-in
for order-0 allocations. Hopefully mm layer might optimize
order-3 allocations in the future since it could give us
a nice boost  (see 8 lines of following benchmark)

The following benchmark shows a win when more than 8 TCP_STREAM
threads are running (56 x86 cores server in my tests)

for thr in {1..30}
do
 sysctl -wq net.core.high_order_alloc_disable=0
 T0=`./super_netperf $thr -H 127.0.0.1 -l 15`
 sysctl -wq net.core.high_order_alloc_disable=1
 T1=`./super_netperf $thr -H 127.0.0.1 -l 15`
 echo $thr:$T0:$T1
done

1: 49979: 37267
2: 98745: 76286
3: 141088: 110051
4: 177414: 144772
5: 197587: 173563
6: 215377: 208448
7: 241061: 234087
8: 267155: 263373
9: 295069: 297402
10: 312393: 335213
11: 340462: 368778
12: 371366: 403954
13: 412344: 443713
14: 426617: 473580
15: 474418: 507861
16: 503261: 538539
17: 522331: 563096
18: 532409: 567084
19: 550824: 605240
20: 525493: 641988
21: 564574: 665843
22: 567349: 690868
23: 583846: 710917
24: 588715: 736306
25: 603212: 763494
26: 604083: 792654
27: 602241: 796450
28: 604291: 797993
29: 611610: 833249
30: 577356: 841062
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ce27ec60
    • Eric Dumazet's avatar
      tcp: add tcp_tx_skb_cache sysctl · 0b7d7f6b
      Eric Dumazet authored 
      Feng Tang reported a performance regression after introduction
of per TCP socket tx/rx caches, for TCP over loopback (netperf)

There is high chance the regression is caused by a change on
how well the 32 KB per-thread page (current->task_frag) can
be recycled, and lack of pcp caches for order-3 pages.

I could not reproduce the regression myself, cpus all being
spinning on the mm spinlocks for page allocs/freeing, regardless
of enabling or disabling the per tcp socket caches.

It seems best to disable the feature by default, and let
admins enabling it.

MM layer either needs to provide scalable order-3 pages
allocations, or could attempt a trylock on zone->lock if
the caller only attempts to get a high-order page and is
able to fallback to order-0 ones in case of pressure.

Tests run on a 56 cores host (112 hyper threads)

-	35.49%	netperf 		 [kernel.vmlinux]	  [k] queued_spin_lock_slowpath
   - 35.49% queued_spin_lock_slowpath
	  - 18.18% get_page_from_freelist
		 - __alloc_pages_nodemask
			- 18.18% alloc_pages_current
				 skb_page_frag_refill
				 sk_page_frag_refill
				 tcp_sendmsg_locked
				 tcp_sendmsg
				 inet_sendmsg
				 sock_sendmsg
				 __sys_sendto
				 __x64_sys_sendto
				 do_syscall_64
				 entry_SYSCALL_64_after_hwframe
				 __libc_send
	  + 17.31% __free_pages_ok
+	31.43%	swapper 		 [kernel.vmlinux]	  [k] intel_idle
+	 9.12%	netperf 		 [kernel.vmlinux]	  [k] copy_user_enhanced_fast_string
+	 6.53%	netserver		 [kernel.vmlinux]	  [k] copy_user_enhanced_fast_string
+	 0.69%	netserver		 [kernel.vmlinux]	  [k] queued_spin_lock_slowpath
+	 0.68%	netperf 		 [kernel.vmlinux]	  [k] skb_release_data
+	 0.52%	netperf 		 [kernel.vmlinux]	  [k] tcp_sendmsg_locked
	 0.46%	netperf 		 [kernel.vmlinux]	  [k] _raw_spin_lock_irqsave

Fixes: 472c2e07 ("tcp: add one skb cache for tx")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reported-by: default avatarFeng Tang <feng.tang@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0b7d7f6b
    • Eric Dumazet's avatar
      tcp: add tcp_rx_skb_cache sysctl · ede61ca4
      Eric Dumazet authored 
      Instead of relying on rps_needed, it is safer to use a separate
static key, since we do not want to enable TCP rx_skb_cache
by default. This feature can cause huge increase of memory
usage on hosts with millions of sockets.
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ede61ca4
    • Eric Dumazet's avatar
      sysctl: define proc_do_static_key() · a8e11e5c
      Eric Dumazet authored 
      Convert proc_dointvec_minmax_bpf_stats() into a more generic
helper, since we are going to use jump labels more often.

Note that sysctl_bpf_stats_enabled is removed, since
it is no longer needed/used.
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a8e11e5c
    • Haiyang Zhang's avatar
      hv_netvsc: Set probe mode to sync · 9a33629b
      Haiyang Zhang authored 
      For better consistency of synthetic NIC names, we set the probe mode to
PROBE_FORCE_SYNCHRONOUS. So the names can be aligned with the vmbus
channel offer sequence.

Fixes: af0a5646 ("use the new async probing feature for the hyperv drivers")
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9a33629b
    • Vlad Buslov's avatar
      net: sched: flower: don't call synchronize_rcu() on mask creation · 99815f50
      Vlad Buslov authored 
      Current flower mask creating code assumes that temporary mask that is used
when inserting new filter is stack allocated. To prevent race condition
with data patch synchronize_rcu() is called every time fl_create_new_mask()
replaces temporary stack allocated mask. As reported by Jiri, this
increases runtime of creating 20000 flower classifiers from 4 seconds to
163 seconds. However, this design is no longer necessary since temporary
mask was converted to be dynamically allocated by commit 2cddd201
("net/sched: cls_flower: allocate mask dynamically in fl_change()").

Remove synchronize_rcu() calls from mask creation code. Instead, refactor
fl_change() to always deallocate temporary mask with rcu grace period.

Fixes: 195c234d ("net: sched: flower: handle concurrent mask insertion")
Reported-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarVlad Buslov <vladbu@mellanox.com>
Tested-by: default avatarJiri Pirko <jiri@mellanox.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      99815f50
    • Anders Roxell's avatar
      net: dsa: fix warning same module names · f0c03ee0
      Anders Roxell authored 
      When building with CONFIG_NET_DSA_REALTEK_SMI and CONFIG_REALTEK_PHY
enabled as loadable modules, we see the following warning:

warning: same module names found:
  drivers/net/phy/realtek.ko
  drivers/net/dsa/realtek.ko

Rework so the driver name is realtek-smi instead of realtek.
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarAnders Roxell <anders.roxell@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f0c03ee0
    • Neil Horman's avatar
      sctp: Free cookie before we memdup a new one · ce950f10
      Neil Horman authored 
      Based on comments from Xin, even after fixes for our recent syzbot
report of cookie memory leaks, its possible to get a resend of an INIT
chunk which would lead to us leaking cookie memory.

To ensure that we don't leak cookie memory, free any previously
allocated cookie first.

Change notes
v1->v2
update subsystem tag in subject (davem)
repeat kfree check for peer_random and peer_hmacs (xin)

v2->v3
net->sctp
also free peer_chunks

v3->v4
fix subject tags

v4->v5
remove cut line
Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
Reported-by: syzbot+f7e9153b037eac9b1df8@syzkaller.appspotmail.com
CC: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
CC: Xin Long <lucien.xin@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: netdev@vger.kernel.org
Acked-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ce950f10
    • Robert Hancock's avatar
      net: dsa: microchip: Don't try to read stats for unused ports · 6bb9e376
      Robert Hancock authored 
      If some of the switch ports were not listed in the device tree, due to
being unused, the ksz_mib_read_work function ended up accessing a NULL
dp->slave pointer and causing an oops. Skip checking statistics for any
unused ports.

Fixes: 7c6ff470 ("net: dsa: microchip: add MIB counter reading support")
Signed-off-by: default avatarRobert Hancock <hancock@sedsystems.ca>
Reviewed-by: default avatarVivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6bb9e376
    • David S. Miller's avatar
      Merge branch 'qmi_wwan-fix-QMAP-handling' · 2309f517
      David S. Miller authored 
      Reinhard Speyerer says:

====================
qmi_wwan: fix QMAP handling

This series addresses the following issues observed when using the
QMAP support of the qmi_wwan driver:

1. The QMAP code in the qmi_wwan driver is based on the CodeAurora
   GobiNet driver ([1], [2]) which does not process QMAP padding
   in the RX path correctly. This causes qmimux_rx_fixup() to pass
   incorrect data to the IP stack when padding is used.

2. qmimux devices currently lack proper network device usage statistics.

3. RCU stalls on device disconnect with QMAP activated like this

   # echo Y > /sys/class/net/wwan0/qmi/raw_ip
   # echo 1 > /sys/class/net/wwan0/qmi/add_mux
   # echo 2 > /sys/class/net/wwan0/qmi/add_mux
   # echo 3 > /sys/class/net/wwan0/qmi/add_mux

   have been observed in certain setups:

   [ 2273.676593] option1 ttyUSB16: GSM modem (1-port) converter now disconnected from ttyUSB16
   [ 2273.676617] option 6-1.2:1.0: device disconnected
   [ 2273.676774] WARNING: CPU: 1 PID: 141 at kernel/rcu/tree_plugin.h:342 rcu_note_context_switch+0x2a/0x3d0
   [ 2273.676776] Modules linked in: option qmi_wwan cdc_mbim cdc_ncm qcserial cdc_wdm usb_wwan sierra sierra_net usbnet mii edd coretemp iptable_mangle ip6_tables iptable_filter ip_tables cdc_acm dm_mod dax iTCO_wdt evdev iTCO_vendor_support sg ftdi_sio usbserial e1000e ptp pps_core i2c_i801 ehci_pci button lpc_ich i2c_core mfd_core uhci_hcd ehci_hcd rtc_cmos usbcore usb_common sd_mod fan ata_piix thermal
   [ 2273.676817] CPU: 1 PID: 141 Comm: kworker/1:1 Not tainted 4.19.38-rsp-1 #1
   [ 2273.676819] Hardware name: Not Applicable   Not Applicable  /CX-GS/GM45-GL40             , BIOS V1.11      03/23/2011
   [ 2273.676828] Workqueue: usb_hub_wq hub_event [usbcore]
   [ 2273.676832] EIP: rcu_note_context_switch+0x2a/0x3d0
   [ 2273.676834] Code: 55 89 e5 57 56 89 c6 53 83 ec 14 89 45 f0 e8 5d ff ff ff 89 f0 64 8b 3d 24 a6 86 c0 84 c0 8b 87 04 02 00 00 75 7a 85 c0 7e 7a <0f> 0b 80 bf 08 02 00 00 00 0f 84 87 00 00 00 e8 b2 e2 ff ff bb dc
   [ 2273.676836] EAX: 00000001 EBX: f614bc00 ECX: 00000001 EDX: c0715b81
   [ 2273.676838] ESI: 00000000 EDI: f18beb40 EBP: f1a3dc20 ESP: f1a3dc00
   [ 2273.676840] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010002
   [ 2273.676842] CR0: 80050033 CR2: b7e97230 CR3: 2f9c4000 CR4: 000406b0
   [ 2273.676843] Call Trace:
   [ 2273.676847]  ? preempt_count_add+0xa5/0xc0
   [ 2273.676852]  __schedule+0x4e/0x4f0
   [ 2273.676855]  ? __queue_work+0xf1/0x2a0
   [ 2273.676858]  ? _raw_spin_lock_irqsave+0x14/0x40
   [ 2273.676860]  ? preempt_count_add+0x52/0xc0
   [ 2273.676862]  schedule+0x33/0x80
   [ 2273.676865]  _synchronize_rcu_expedited+0x24e/0x280
   [ 2273.676867]  ? rcu_accelerate_cbs_unlocked+0x70/0x70
   [ 2273.676871]  ? wait_woken+0x70/0x70
   [ 2273.676873]  ? rcu_accelerate_cbs_unlocked+0x70/0x70
   [ 2273.676875]  ? _synchronize_rcu_expedited+0x280/0x280
   [ 2273.676877]  synchronize_rcu_expedited+0x22/0x30
   [ 2273.676881]  synchronize_net+0x25/0x30
   [ 2273.676885]  dev_deactivate_many+0x133/0x230
   [ 2273.676887]  ? preempt_count_add+0xa5/0xc0
   [ 2273.676890]  __dev_close_many+0x4d/0xc0
   [ 2273.676892]  ? skb_dequeue+0x40/0x50
   [ 2273.676895]  dev_close_many+0x5d/0xd0
   [ 2273.676898]  rollback_registered_many+0xbf/0x4c0
   [ 2273.676901]  ? raw_notifier_call_chain+0x1a/0x20
   [ 2273.676904]  ? call_netdevice_notifiers_info+0x23/0x60
   [ 2273.676906]  ? netdev_master_upper_dev_get+0xe/0x70
   [ 2273.676908]  rollback_registered+0x1f/0x30
   [ 2273.676911]  unregister_netdevice_queue+0x47/0xb0
   [ 2273.676915]  qmimux_unregister_device+0x1f/0x30 [qmi_wwan]
   [ 2273.676917]  qmi_wwan_disconnect+0x5d/0x90 [qmi_wwan]
   ...
   [ 2273.677001] ---[ end trace 0fcc5f88496b485a ]---
   [ 2294.679136] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
   [ 2294.679140] rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P141
   [ 2294.679144] rcu: 	(detected by 0, t=21002 jiffies, g=265857, q=8446)
   [ 2294.679148] kworker/1:1     D    0   141      2 0x80000000

In addition the permitted QMAP mux_id value range is extended for
compatibility with ip(8) and the rmnet driver.

Reinhard

[1]: https://portland.source.codeaurora.org/patches/quic/gobi
[2]: https://portland.source.codeaurora.org/quic/qsdk/oss/lklm/gobinet/
====================
Tested-by: default avatarDaniele Palmas <dnlplm@gmail.com>
Acked-by: default avatarBjørn Mork <bjorn@mork.no>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2309f517
    • Reinhard Speyerer's avatar
      qmi_wwan: extend permitted QMAP mux_id value range · 36815b41
      Reinhard Speyerer authored 
      Permit mux_id values up to 254 to be used in qmimux_register_device()
for compatibility with ip(8) and the rmnet driver.

Fixes: c6adf779 ("net: usb: qmi_wwan: add qmap mux protocol support")
Cc: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: default avatarReinhard Speyerer <rspmn@arcor.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      36815b41
    • Reinhard Speyerer's avatar
      qmi_wwan: avoid RCU stalls on device disconnect when in QMAP mode · a8fdde1c
      Reinhard Speyerer authored 
      Switch qmimux_unregister_device() and qmi_wwan_disconnect() to
use unregister_netdevice_queue() and unregister_netdevice_many()
instead of unregister_netdevice(). This avoids RCU stalls which
have been observed on device disconnect in certain setups otherwise.

Fixes: c6adf779 ("net: usb: qmi_wwan: add qmap mux protocol support")
Cc: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: default avatarReinhard Speyerer <rspmn@arcor.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a8fdde1c
    • Reinhard Speyerer's avatar
      qmi_wwan: add network device usage statistics for qmimux devices · 44f82312
      Reinhard Speyerer authored 
      Add proper network device usage statistics for qmimux devices
instead of reporting all-zero values for them.

Fixes: c6adf779 ("net: usb: qmi_wwan: add qmap mux protocol support")
Cc: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: default avatarReinhard Speyerer <rspmn@arcor.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      44f82312
    • Reinhard Speyerer's avatar
      qmi_wwan: add support for QMAP padding in the RX path · 61356088
      Reinhard Speyerer authored 
      The QMAP code in the qmi_wwan driver is based on the CodeAurora GobiNet
driver which does not process QMAP padding in the RX path correctly.
Add support for QMAP padding to qmimux_rx_fixup() according to the
description of the rmnet driver.

Fixes: c6adf779 ("net: usb: qmi_wwan: add qmap mux protocol support")
Cc: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: default avatarReinhard Speyerer <rspmn@arcor.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      61356088
  3. 14 Jun, 2019 10 commits
  5. 12 Jun, 2019 12 commits
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