Commit Graph

770519 Commits

Author SHA1 Message Date
Vlad Buslov
e329bc4273 net: sched: act_police: remove dependency on rtnl lock
Use tcf spinlock to protect police action private data from concurrent
modification during dump. (init already uses tcf spinlock when changing
police action state)

Pass tcf spinlock as estimator lock argument to gen_replace_estimator()
during action init.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:10 -07:00
Vlad Buslov
51a9f5ae65 net: core: protect rate estimator statistics pointer with lock
Extend gen_new_estimator() to also take stats_lock when re-assigning rate
estimator statistics pointer. (to be used by unlocked actions)

Rename 'stats_lock' to 'lock' and change argument description to explain
that it is now also used for control path.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:10 -07:00
Vlad Buslov
4e232818bd net: sched: act_mirred: remove dependency on rtnl lock
Re-introduce mirred list spinlock, that was removed some time ago, in order
to protect it from concurrent modifications, instead of relying on rtnl
lock.

Use tcf spinlock to protect mirred action private data from concurrent
modification in init and dump. Rearrange access to mirred data in order to
be performed only while holding the lock.

Rearrange net dev access to always hold reference while working with it,
instead of relying on rntl lock.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:10 -07:00
Vlad Buslov
84a75b329b net: sched: extend action ops with put_dev callback
As a preparation for removing dependency on rtnl lock from rules update
path, all users of shared objects must take reference while working with
them.

Extend action ops with put_dev() API to be used on net device returned by
get_dev().

Modify mirred action (only action that implements get_dev callback):
- Take reference to net device in get_dev.
- Implement put_dev API that releases reference to net device.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:10 -07:00
Vlad Buslov
764e9a2448 net: sched: act_vlan: remove dependency on rtnl lock
Use tcf spinlock to protect vlan action private data from concurrent
modification during dump and init. Use rcu swap operation to reassign
params pointer under protection of tcf lock. (old params value is not used
by init, so there is no need of standalone rcu dereference step)

Remove rtnl assertion that is no longer necessary.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:10 -07:00
Vlad Buslov
729e012609 net: sched: act_tunnel_key: remove dependency on rtnl lock
Use tcf lock to protect tunnel key action struct private data from
concurrent modification in init and dump. Use rcu swap operation to
reassign params pointer under protection of tcf lock. (old params value is
not used by init, so there is no need of standalone rcu dereference step)

Remove rtnl lock assertion that is no longer required.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:10 -07:00
Vlad Buslov
c8814552fe net: sched: act_skbmod: remove dependency on rtnl lock
Move read of skbmod_p rcu pointer to be protected by tcf spinlock. Use tcf
spinlock to protect private skbmod data from concurrent modification during
dump.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
5e48180ed8 net: sched: act_simple: remove dependency on rtnl lock
Use tcf spinlock to protect private simple action data from concurrent
modification during dump. (simple init already uses tcf spinlock when
changing action state)

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
d772849566 net: sched: act_sample: remove dependency on rtnl lock
Use tcf spinlock to protect private sample action data from concurrent
modification during dump and init.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
67b0c1a3c9 net: sched: act_pedit: remove dependency on rtnl lock
Rearrange pedit init code to only access pedit action data while holding
tcf spinlock. Change keys allocation type to atomic to allow it to execute
while holding tcf spinlock. Take tcf spinlock in dump function when
accessing pedit action data.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
ff25276de9 net: sched: act_ipt: remove dependency on rtnl lock
Use tcf spinlock to protect ipt action private data from concurrent
modification during dump. Ipt init already takes tcf spinlock when
modifying ipt state.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
54d0d423a4 net: sched: act_ife: remove dependency on rtnl lock
Use tcf spinlock and rcu to protect params pointer from concurrent
modification during dump and init. Use rcu swap operation to reassign
params pointer under protection of tcf lock. (old params value is not used
by init, so there is no need of standalone rcu dereference step)

Ife action has meta-actions that are compiled as standalone modules. Rtnl
mutex must be released while loading a kernel module. In order to support
execution without rtnl mutex, propagate 'rtnl_held' argument to meta action
loading functions. When requesting meta action module, conditionally
release rtnl lock depending on 'rtnl_held' argument.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
e8917f4370 net: sched: act_gact: remove dependency on rtnl lock
Use tcf spinlock to protect gact action private state from concurrent
modification during dump and init. Remove rtnl assertion that is no longer
necessary.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
b6a2b971c0 net: sched: act_csum: remove dependency on rtnl lock
Use tcf lock to protect csum action struct private data from concurrent
modification in init and dump. Use rcu swap operation to reassign params
pointer under protection of tcf lock. (old params value is not used by
init, so there is no need of standalone rcu dereference step)

Remove rtnl assertion that is no longer necessary.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
Vlad Buslov
2142236b45 net: sched: act_bpf: remove dependency on rtnl lock
Use tcf spinlock to protect bpf action private data from concurrent
modification during dump and init. Remove rtnl lock assertion that is no
longer necessary.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:37:09 -07:00
David S. Miller
2b14e1ea21 Merge branch 'net-sctp-Avoid-allocating-high-order-memory-with-kmalloc'
Konstantin Khorenko says:

====================
net/sctp: Avoid allocating high order memory with kmalloc()

Each SCTP association can have up to 65535 input and output streams.
For each stream type an array of sctp_stream_in or sctp_stream_out
structures is allocated using kmalloc_array() function. This function
allocates physically contiguous memory regions, so this can lead
to allocation of memory regions of very high order, i.e.:

  sizeof(struct sctp_stream_out) == 24,
  ((65535 * 24) / 4096) == 383 memory pages (4096 byte per page),
  which means 9th memory order.

This can lead to a memory allocation failures on the systems
under a memory stress.

We actually do not need these arrays of memory to be physically
contiguous. Possible simple solution would be to use kvmalloc()
instread of kmalloc() as kvmalloc() can allocate physically scattered
pages if contiguous pages are not available. But the problem
is that the allocation can happed in a softirq context with
GFP_ATOMIC flag set, and kvmalloc() cannot be used in this scenario.

So the other possible solution is to use flexible arrays instead of
contiguios arrays of memory so that the memory would be allocated
on a per-page basis.

This patchset replaces kvmalloc() with flex_array usage.
It consists of two parts:

  * First patch is preparatory - it mechanically wraps all direct
    access to assoc->stream.out[] and assoc->stream.in[] arrays
    with SCTP_SO() and SCTP_SI() wrappers so that later a direct
    array access could be easily changed to an access to a
    flex_array (or any other possible alternative).
  * Second patch replaces kmalloc_array() with flex_array usage.

v2 changes:
 sctp_stream_in() users are updated to provide stream as an argument,
 sctp_stream_{in,out}_ptr() are now just sctp_stream_{in,out}().

v3 changes:
 Move type chages struct sctp_stream_out -> flex_array to next patch.
 Make sctp_stream_{in,out}() static incline and move them to a header.

Performance results (single stream):
====================================
  * Kernel: v4.18-rc6 - stock and with 2 patches from Oleg (earlier in this thread)
  * Node: CPU (8 cores): Intel(R) Xeon(R) CPU E31230 @ 3.20GHz
          RAM: 32 Gb

  * netperf: taken from https://github.com/HewlettPackard/netperf.git,
	     compiled from sources with sctp support
  * netperf server and client are run on the same node
  * ip link set lo mtu 1500

The script used to run tests:
 # cat run_tests.sh
 #!/bin/bash

for test in SCTP_STREAM SCTP_STREAM_MANY SCTP_RR SCTP_RR_MANY; do
  echo "TEST: $test";
  for i in `seq 1 3`; do
    echo "Iteration: $i";
    set -x
    netperf -t $test -H localhost -p 22222 -S 200000,200000 -s 200000,200000 \
            -l 60 -- -m 1452;
    set +x
  done
done
================================================

Results (a bit reformatted to be more readable):
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

				v4.18-rc7	v4.18-rc7 + fixes
TEST: SCTP_STREAM
212992 212992   1452    60.21	1125.52		1247.04
212992 212992   1452    60.20	1376.38		1149.95
212992 212992   1452    60.20	1131.40		1163.85
TEST: SCTP_STREAM_MANY
212992 212992   1452    60.00	1111.00		1310.05
212992 212992   1452    60.00	1188.55		1130.50
212992 212992   1452    60.00	1108.06		1162.50

===========
Local /Remote
Socket Size   Request  Resp.   Elapsed  Trans.
Send   Recv   Size     Size    Time     Rate
bytes  Bytes  bytes    bytes   secs.    per sec

					v4.18-rc7	v4.18-rc7 + fixes
TEST: SCTP_RR
212992 212992 1        1       60.00	45486.98	46089.43
212992 212992 1        1       60.00	45584.18	45994.21
212992 212992 1        1       60.00	45703.86	45720.84
TEST: SCTP_RR_MANY
212992 212992 1        1       60.00	40.75		40.77
212992 212992 1        1       60.00	40.58		40.08
212992 212992 1        1       60.00	39.98		39.97

Performance results for many streams:
=====================================
   * Kernel: v4.18-rc8 - stock and with 2 patches v3
   * Node: CPU (8 cores): Intel(R) Xeon(R) CPU E31230 @ 3.20GHz
           RAM: 32 Gb

   * sctp_test: https://github.com/sctp/lksctp-tools
   * both server and client are run on the same node
   * ip link set lo mtu 1500
   * sysctl -w vm.max_map_count=65530000 (need it to make memory fragmented)

The script used to run tests:
=============================
 # cat run_sctp_test.sh
 #!/bin/bash

set -x

uname -r
ip link set lo mtu 1500
swapoff -a

free
cat /proc/buddyinfo

./src/apps/sctp_test -H 127.0.0.1 -P 22222 -l -d 0 &
sleep 3

time ./src/apps/sctp_test -H 127.0.0.1 -P 22221 -h 127.0.0.1 -p 22222 \
         -s -c 1 -M 65535 -T -t 1 -x 100000 -d 0 1>/dev/null

killall -9 lt-sctp_test
===============================

Results (a bit reformatted to be more readable):

1) ms stock kernel v4.18-rc8, no memory fragmentation
	test 1		test 2		test 3
real    0m14.715s	0m14.593s	0m15.954s
user    0m0.954s	0m0.955s	0m0.854s
sys     0m13.388s	0m12.537s	0m13.749s

2) kernel with fixes, no memory fragmentation
	test 1		test 2		test 3
real    0m14.959s	0m14.693s	0m14.762s
user    0m0.948s	0m0.921s	0m0.929s
sys     0m13.538s	0m13.225s	0m13.217s

3) kernel with fixes, memory fragmented
'free':
               total        used        free      shared  buff/cache   available
Mem:       32906008    30555200      302740         764     2048068      266452
Mem:       32906008    30379948      541436         764     1984624      442376
Mem:       32906008    30717312      262380         764     1926316      109908

/proc/buddyinfo:
Node 0, zone   Normal  40773     37     34     29      0      0      0      0      0      0      0
Node 0, zone   Normal 100332     68      8      4      2      1      1      0      0      0      0
Node 0, zone   Normal  31113      7      2      1      0      0      0      0      0      0      0

	test 1		test 2		test 3
real    0m14.159s	0m15.252s	0m15.826s
user    0m0.839s	0m1.004s	0m1.048s
sys     0m11.827s	0m14.240s	0m14.778s
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:26:48 -07:00
Konstantin Khorenko
0d493b4d0b net/sctp: Replace in/out stream arrays with flex_array
This path replaces physically contiguous memory arrays
allocated using kmalloc_array() with flexible arrays.
This enables to avoid memory allocation failures on the
systems under a memory stress.

Signed-off-by: Oleg Babin <obabin@virtuozzo.com>
Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:25:15 -07:00
Konstantin Khorenko
05364ca03c net/sctp: Make wrappers for accessing in/out streams
This patch introduces wrappers for accessing in/out streams indirectly.
This will enable to replace physically contiguous memory arrays
of streams with flexible arrays (or maybe any other appropriate
mechanism) which do memory allocation on a per-page basis.

Signed-off-by: Oleg Babin <obabin@virtuozzo.com>
Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:25:15 -07:00
Keara Leibovitz
b70f1f3af4 tc: Update README and add config
Updated README.

Added config file that contains the minimum required features enabled to
run the tests currently present in the kernel.
This must be updated when new unittests are created and require their own
modules.

Signed-off-by: Keara Leibovitz <kleib@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:20:59 -07:00
David S. Miller
3305f9a905 Merge branch 'l2tp-rework-pppol2tp-ioctl-handling'
Guillaume Nault says:

====================
l2tp: rework pppol2tp ioctl handling

The current ioctl() handling code can be simplified. It tests for
non-relevant conditions and uselessly holds sockets. Once useless
code is removed, it becomes even simpler to let pppol2tp_ioctl() handle
commands directly, rather than dispatch them to pppol2tp_tunnel_ioctl()
or pppol2tp_session_ioctl(). That is the approach taken by this series.

Patch #1 and #2 define helper functions aimed at simplifying the rest
of the patch set.

Patch #3 drops useless tests in pppol2p_ioctl() and avoid holding a
refcount on the socket.

Patches #4, #5 and #6 are the core of the series. They let
pppol2tp_ioctl() handle all ioctls and drop the tunnel and session
specific functions.

Then patch #6 brings a little bit of consolidation.

Finally, patch #7 takes advantage of the simplified code to make
pppol2tp sockets compatible with dev_ioctl(). Certainly not a killer
feature, but it is trivial and it is always nice to see l2tp getting
better integration with the rest of the stack.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
4f5f85e9a7 l2tp: let pppol2tp_ioctl() fallback to dev_ioctl()
Return -ENOIOCTLCMD for unknown ioctl commands. This lets dev_ioctl()
handle generic socket ioctls like SIOCGIFNAME or SIOCGIFINDEX.
PF_PPPOX/PX_PROTO_OL2TP was one of the few socket types not honouring
this mechanism.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
7390ed8a40 l2tp: zero out stats in pppol2tp_copy_stats()
Integrate memset(0) in pppol2tp_copy_stats() to avoid calling it
manually every time.

While there, constify 'stats'.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
b0e29063dc l2tp: remove pppol2tp_session_ioctl()
pppol2tp_ioctl() has everything in place for handling PPPIOCGL2TPSTATS
on session sockets. We just need to copy the stats and set ->session_id.

As a side effect of sharing session and tunnel code, ->using_ipsec is
properly set even when the request was made using a session socket.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
528534f0de l2tp: remove pppol2tp_tunnel_ioctl()
Handle PPPIOCGL2TPSTATS in pppol2tp_ioctl() if the socket represents a
tunnel. This one is a bit special because the caller may use the tunnel
socket to retrieve statistics of one of its sessions. If the session_id
is set, the corresponding session's statistics are returned, instead of
those of the tunnel. This is handled by the new
pppol2tp_tunnel_copy_stats() helper function.

Set ->tunnel_id and ->using_ipsec out of the conditional, so
that it can be used by the 'else' branch in the following patch.
We cannot do that for ->session_id, because tunnel sockets have to
report the value that was originally passed in 'stats.session_id',
while session sockets have to report their own session_id.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
79e6760e64 l2tp: handle PPPIOC[GS]MRU and PPPIOC[GS]FLAGS in pppol2tp_ioctl()
Let pppol2tp_ioctl() handle ioctl commands directly. It still relies on
pppol2tp_{session,tunnel}_ioctl() for PPPIOCGL2TPSTATS.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
bdd0292f96 l2tp: simplify pppol2tp_ioctl()
* Drop test on 'sk': sock->sk cannot be NULL, or pppox_ioctl() could
    not have called us.

  * Drop test on 'SOCK_DEAD' state: if this flag was set, the socket
    would be in the process of being released and no ioctl could be
    running anymore.

  * Drop test on 'PPPOX_*' state: we depend on ->sk_user_data to get
    the session structure. If it is non-NULL, then the socket is
    connected. Testing for PPPOX_* is redundant.

  * Retrieve session using ->sk_user_data directly, instead of going
    through pppol2tp_sock_to_session(). This avoids grabbing a useless
    reference on the socket.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
01e28b921b l2tp: split l2tp_session_get()
l2tp_session_get() is used for two different purposes. If 'tunnel' is
NULL, the session is searched globally in the supplied network
namespace. Otherwise it is searched exclusively in the tunnel context.

Callers always know the context in which they need to search the
session. But some of them do provide both a namespace and a tunnel,
making the semantic of the call unclear.

This patch defines l2tp_tunnel_get_session() for lookups done in a
tunnel and restricts l2tp_session_get() to namespace searches.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
Guillaume Nault
d6a61ec936 l2tp: define l2tp_tunnel_uses_xfrm()
Use helper function to figure out if a tunnel is using ipsec.
Also, avoid accessing ->sk_policy directly since it's RCU protected.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:13:49 -07:00
David S. Miller
8a8982d1e2 Merge branch 'netsec-driver-improvements'
Ilias Apalodimas says:

====================
netsec driver improvements

This patchset introduces some improvements on socionext netsec driver.
 - patch 1/2, avoids unneeded MMIO reads on the Rx path
 - patch 2/2, is adjusting the numbers of descriptors used

Changes since v1:
 - Move dma_rmb() to protect descriptor accesses until the device
 has updated the NETSEC_RX_PKT_OWN_FIELD bit
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:11:36 -07:00
Ilias Apalodimas
b6311b7bea net: socionext: Increase descriptors to 256
Increasing descriptors to 256 from 128 and adjusting the NAPI weight
to 64 increases performace on Rx by ~20% on 64byte packets

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:11:36 -07:00
Ilias Apalodimas
63ae7949e9 net: socionext: Use descriptor info instead of MMIO reads on Rx
MMIO reads for remaining packets in queue occur (at least)twice per
invocation of netsec_process_rx(). We can use the packet descriptor to
identify if it's owned by the hardware and break out, avoiding the more
expensive MMIO read operations. This has a ~2% increase on the pps of the
Rx path when tested with 64byte packets

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:11:36 -07:00
YueHaibing
78aca3bbee vxge: remove set but not used variable 'req_out', 'status' and 'ret'
Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/neterion/vxge/vxge-config.c:1097:6: warning:
 variable 'ret' set but not used [-Wunused-but-set-variable]
drivers/net/ethernet/neterion/vxge/vxge-config.c:2263:6: warning:
 variable 'req_out' set but not used [-Wunused-but-set-variable]
drivers/net/ethernet/neterion/vxge/vxge-config.c:2262:22: warning:
 variable 'status' set but not used [-Wunused-but-set-variable]
drivers/net/ethernet/neterion/vxge/vxge-config.c:2360:22: warning:
 variable 'status' set but not used [-Wunused-but-set-variable]
  enum vxge_hw_status status = VXGE_HW_OK;

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:05:19 -07:00
David S. Miller
29afde5051 Merge branch 'virtio_net-Expand-affinity-to-arbitrary-numbers-of-cpu-and-vq'
Caleb Raitto says:

====================
virtio_net: Expand affinity to arbitrary numbers of cpu and vq

Virtio-net tries to pin each virtual queue rx and tx interrupt to a cpu if
there are as many queues as cpus.

Expand this heuristic to configure a reasonable affinity setting also
when the number of cpus != the number of virtual queues.

Patch 1 allows vqs to take an affinity mask with more than 1 cpu.
Patch 2 generalizes the algorithm in virtnet_set_affinity beyond
the case where #cpus == #vqs.

v2 changes:
Renamed "virtio_net: Make vp_set_vq_affinity() take a mask." to
"virtio: Make vp_set_vq_affinity() take a mask."

Tested:

[InstanceSetup]
set_multiqueue = false

$ cd /proc/irq
$ for i in `seq 24 60` ; do sudo grep ".*" $i/smp_affinity_list;  done
0-15
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
0-15
0-15
0-15
0-15

$ cd /sys/class/net/eth0/queues/
$ for i in `seq 0 15` ; do sudo grep ".*" tx-$i/xps_cpus; done
0001
0002
0004
0008
0010
0020
0040
0080
0100
0200
0400
0800
1000
2000
4000
8000

$ sudo ethtool -L eth0 combined 15

$ cd /proc/irq
$ for i in `seq 24 60` ; do sudo grep ".*" $i/smp_affinity_list;  done
0-15
0-1
0-1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
15
15
0-15
0-15
0-15
0-15

$ cd /sys/class/net/eth0/queues/
$ for i in `seq 0 14` ; do sudo grep ".*" tx-$i/xps_cpus; done
0003
0004
0008
0010
0020
0040
0080
0100
0200
0400
0800
1000
2000
4000
8000

$ sudo ethtool -L eth0 combined 8

$ cd /proc/irq
$ for i in `seq 24 60` ; do sudo grep ".*" $i/smp_affinity_list;  done
0-15
0-1
0-1
2-3
2-3
4-5
4-5
6-7
6-7
8-9
8-9
10-11
10-11
12-13
12-13
14-15
14-15
9
9
10
10
11
11
12
12
13
13
14
14
15
15
15
15
0-15
0-15
0-15
0-15

$ cd /sys/class/net/eth0/queues/
$ for i in `seq 0 7` ; do sudo grep ".*" tx-$i/xps_cpus; done
0003
000c
0030
00c0
0300
0c00
3000
c000

$ sudo ethtool -L eth0 combined 16
$ sudo sh -c "echo 0 > /sys/devices/system/cpu/cpu15/online"

$ cd /proc/irq
$ for i in `seq 24 60` ; do sudo grep ".*" $i/smp_affinity_list;  done
0-15
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
0
0
0-15
0-15
0-15
0-15

$ cd /sys/class/net/eth0/queues/
$ for i in `seq 0 15` ; do sudo grep ".*" tx-$i/xps_cpus; done
0001
0002
0004
0008
0010
0020
0040
0080
0100
0200
0400
0800
1000
2000
4000
0001

$ for i in `seq 8 15`; \
do sudo sh -c "echo 0 > /sys/devices/system/cpu/cpu$i/online"; done

$ cd /proc/irq
$ for i in `seq 24 60` ; do sudo grep ".*" $i/smp_affinity_list;  done
0-15
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
0-15
0-15
0-15
0-15

$ cd /sys/class/net/eth0/queues/
$ for i in `seq 0 15` ; do sudo grep ".*" tx-$i/xps_cpus; done
0001
0002
0004
0008
0010
0020
0040
0080
0001
0002
0004
0008
0010
0020
0040
0080
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:02:18 -07:00
Caleb Raitto
2ca653d607 virtio_net: Stripe queue affinities across cores.
Always set the affinity hint, even if #cpu != #vq.

Handle the case where #cpu > #vq (including when #cpu % #vq != 0) and
when #vq > #cpu (including when #vq % #cpu != 0).

Signed-off-by: Caleb Raitto <caraitto@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Jon Olson <jonolson@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:02:18 -07:00
Caleb Raitto
19e226e8cc virtio: Make vp_set_vq_affinity() take a mask.
Make vp_set_vq_affinity() take a cpumask instead of taking a single CPU.

If there are fewer queues than cores, queue affinity should be able to
map to multiple cores.

Link: https://patchwork.ozlabs.org/patch/948149/
Suggested-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Caleb Raitto <caraitto@google.com>
Acked-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 12:02:18 -07:00
Bryan Whitehead
07624df1c9 lan743x: lan743x: Add PTP support
PTP support includes:
    Ingress, and egress timestamping.
    One step timestamping available.
    PTP clock support.
    Periodic output support.

Signed-off-by: Bryan Whitehead <Bryan.Whitehead@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:42:18 -07:00
David S. Miller
217e502b89 Merge branch 'tcp-new-mechanism-to-ACK-immediately'
Yuchung Cheng says:

====================
tcp: new mechanism to ACK immediately

This patch is a follow-up feature improvement to the recent fixes on
the performance issues in ECN (delayed) ACKs. Many of the fixes use
tcp_enter_quickack_mode routine to force immediate ACKs. However the
routine also reset tracking interactive session. This is not ideal
because these immediate ACKs are required by protocol specifics
unrelated to the interactiveness nature of the application.

This patch set introduces a new flag to send a one-time immediate ACK
without changing the status of interactive session tracking. With this
patch set the immediate ACKs are generated upon these protocol states:

1) When a hole is repaired
2) When CE status changes between subsequent data packets received
3) When a data packet carries CWR flag
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:31:36 -07:00
Yuchung Cheng
fd2123a3d7 tcp: avoid resetting ACK timer upon receiving packet with ECN CWR flag
Previously commit 9aee400061 ("tcp: ack immediately when a cwr
packet arrives") calls tcp_enter_quickack_mode to force sending
two immediate ACKs upon receiving a packet w/ CWR flag. The side
effect is it'll also reset the delayed ACK timer and interactive
session tracking. This patch removes that side effect by using the
new ACK_NOW flag to force an immmediate ACK.

Packetdrill to demonstrate:

    0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
   +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
   +0 setsockopt(3, SOL_TCP, TCP_CONGESTION, "dctcp", 5) = 0
   +0 bind(3, ..., ...) = 0
   +0 listen(3, 1) = 0

   +0 < [ect0] SEW 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
   +0 > SE. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
  +.1 < [ect0] . 1:1(0) ack 1 win 257
   +0 accept(3, ..., ...) = 4

   +0 < [ect0] . 1:1001(1000) ack 1 win 257
   +0 > [ect01] . 1:1(0) ack 1001

   +0 write(4, ..., 1) = 1
   +0 > [ect01] P. 1:2(1) ack 1001

   +0 < [ect0] . 1001:2001(1000) ack 2 win 257
   +0 write(4, ..., 1) = 1
   +0 > [ect01] P. 2:3(1) ack 2001

   +0 < [ect0] . 2001:3001(1000) ack 3 win 257
   +0 < [ect0] . 3001:4001(1000) ack 3 win 257
   // Ack delayed ...

   +.01 < [ce] P. 4001:4501(500) ack 3 win 257
   +0 > [ect01] . 3:3(0) ack 4001
   +0 > [ect01] E. 3:3(0) ack 4501

+.001 read(4, ..., 4500) = 4500
   +0 write(4, ..., 1) = 1
   +0 > [ect01] PE. 3:4(1) ack 4501 win 100

 +.01 < [ect0] W. 4501:5501(1000) ack 4 win 257
   // No delayed ACK on CWR flag
   +0 > [ect01] . 4:4(0) ack 5501

 +.31 < [ect0] . 5501:6501(1000) ack 4 win 257
   +0 > [ect01] . 4:4(0) ack 6501

Fixes: 9aee400061 ("tcp: ack immediately when a cwr packet arrives")
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>
2018-08-11 11:31:35 -07:00
Yuchung Cheng
15bdd5686c tcp: always ACK immediately on hole repairs
RFC 5681 sec 4.2:
  To provide feedback to senders recovering from losses, the receiver
  SHOULD send an immediate ACK when it receives a data segment that
  fills in all or part of a gap in the sequence space.

When a gap is partially filled, __tcp_ack_snd_check already checks
the out-of-order queue and correctly send an immediate ACK. However
when a gap is fully filled, the previous implementation only resets
pingpong mode which does not guarantee an immediate ACK because the
quick ACK counter may be zero. This patch addresses this issue by
marking the one-time immediate ACK flag instead.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:31:35 -07:00
Yuchung Cheng
d2ccd7bc8a tcp: avoid resetting ACK timer in DCTCP
The recent fix of acking immediately in DCTCP on CE status change
has an undesirable side-effect: it also resets TCP ack timer and
disables pingpong mode (interactive session). But the CE status
change has nothing to do with them. This patch addresses that by
using the new one-time immediate ACK flag instead of calling
tcp_enter_quickack_mode().

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:31:35 -07:00
Yuchung Cheng
466466dc6c tcp: mandate a one-time immediate ACK
Add a new flag to indicate a one-time immediate ACK. This flag is
occasionaly set under specific TCP protocol states in addition to
the more common quickack mechanism for interactive application.

In several cases in the TCP code we want to force an immediate ACK
but do not want to call tcp_enter_quickack_mode() because we do
not want to forget the icsk_ack.pingpong or icsk_ack.ato state.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:31:35 -07:00
Gustavo A. R. Silva
8a8a894ebb wimax: usb-tx: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I placed the "fall through"
annotation at the bottom of the case, which is what GCC is expecting
to find.

Addresses-Coverity-ID: 115075 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:29:36 -07:00
Gustavo A. R. Silva
849063074a wimax: usb-fw: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I placed the "fall through"
annotation at the bottom of the case, which is what GCC is expecting
to find.

Addresses-Coverity-ID: 1369529 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:29:36 -07:00
Gustavo A. R. Silva
d331e75897 net: dp83640: Mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I replaced the code comment at the
top of the switch statement with a proper "fall through" annotation for
each case, which is what GCC is expecting to find.

Addresses-Coverity-ID: 1056542 ("Missing break in switch")
Addresses-Coverity-ID: 1339579 ("Missing break in switch")
Addresses-Coverity-ID: 1369526 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:28:34 -07:00
Colin Ian King
98ed1e642c rxrpc: remove redundant static int 'zero'
The static int 'zero' is defined but is never used hence it is
redundant and can be removed. The use of this variable was removed
with commit a158bdd324 ("rxrpc: Fix call timeouts").

Cleans up clang warning:
warning: 'zero' defined but not used [-Wunused-const-variable=]

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:25:18 -07:00
zhong jiang
f741917e24 drivers/net/usb/r8152: remove the unneeded variable "ret" in rtl8152_system_suspend
rtl8152_system_suspend defines the variable "ret", but it is not modified
after initialization. So just remove it.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-11 11:23:25 -07:00
Vasundhara Volam
8605212a7c bnxt_en: Fix strcpy() warnings in bnxt_ethtool.c
This patch fixes following smatch warnings:

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2826 bnxt_fill_coredump_seg_hdr() error: strcpy() '"sEgM"' too large for 'seg_hdr->signature' (5 vs 4)
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2858 bnxt_fill_coredump_record() error: strcpy() '"cOrE"' too large for 'record->signature' (5 vs 4)
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:2879 bnxt_fill_coredump_record() error: strcpy() 'utsname()->sysname' too large for 'record->os_name' (65 vs 32)

Fixes: 6c5657d085 ("bnxt_en: Add support for ethtool get dump.")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-10 19:12:18 -07:00
Raghu Vatsavayi
0520344cdb liquidio: copperhead LED identification
Add LED identification support for liquidio TP copperhead cards.

Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@cavium.com>
Acked-by: Derek Chickles <derek.chickles@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-10 14:43:46 -07:00
kbuild test robot
1e7953bc56 qed/qede: qede_setup_tc() can be static
Fixes: 5e7baf0fcb ("qed/qede: Multi CoS support.")
Signed-off-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-10 14:41:52 -07:00
YueHaibing
4f23c43c41 mlxsw: core: remove unnecessary function mlxsw_core_driver_put
The function mlxsw_core_driver_put only traverse mlxsw_core_driver_list
to find the matched mlxsw_driver,but never used it.
So it can be removed safely.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-10 14:40:57 -07:00