Commit Graph

784115 Commits

Author SHA1 Message Date
Vakul Garg 4128c0cfb1 tls: Fixed uninitialised vars warning
In tls_sw_sendmsg() and tls_sw_sendpage(), it is possible that the
uninitialised variable 'ret' gets passed to sk_stream_error(). So
initialise local variable 'ret' to '0. The warnings were detected by
'smatch' tool.

Fixes: a42055e8d2 ("net/tls: Add support for async encryption")
Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:24:52 -07:00
Vakul Garg 9932a29ab1 net/tls: Fixed race condition in async encryption
On processors with multi-engine crypto accelerators, it is possible that
multiple records get encrypted in parallel and their encryption
completion is notified to different cpus in multicore processor. This
leads to the situation where tls_encrypt_done() starts executing in
parallel on different cores. In current implementation, encrypted
records are queued to tx_ready_list in tls_encrypt_done(). This requires
addition to linked list 'tx_ready_list' to be protected. As
tls_decrypt_done() could be executing in irq content, it is not possible
to protect linked list addition operation using a lock.

To fix the problem, we remove linked list addition operation from the
irq context. We do tx_ready_list addition/removal operation from
application context only and get rid of possible multiple access to
the linked list. Before starting encryption on the record, we add it to
the tail of tx_ready_list. To prevent tls_tx_records() from transmitting
it, we mark the record with a new flag 'tx_ready' in 'struct tls_rec'.
When record encryption gets completed, tls_encrypt_done() has to only
update the 'tx_ready' flag to true & linked list add operation is not
required.

The changed logic brings some other side benefits. Since the records
are always submitted in tls sequence number order for encryption, the
tx_ready_list always remains sorted and addition of new records to it
does not have to traverse the linked list.

Lastly, we renamed tx_ready_list in 'struct tls_sw_context_tx' to
'tx_list'. This is because now, the some of the records at the tail are
not ready to transmit.

Fixes: a42055e8d2 ("net/tls: Add support for async encryption")
Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:24:24 -07:00
David S. Miller 094fe7392d Merge branch 'few-NTF_ROUTER-related-updates'
Roopa Prabhu says:

====================
few NTF_ROUTER related updates

This series allows setting of NTF_ROUTER by an external
entity (eg BGP E-VPN control plane). Also fixes missing
netlink notification on neigh NTF_ROUTER flag changes.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:21:33 -07:00
Roopa Prabhu fc6e8073f3 neighbour: send netlink notification if NTF_ROUTER changes
send netlink notification if neigh_update results in NTF_ROUTER
change and if NEIGH_UPDATE_F_ISROUTER is on. Also move the
NTF_ROUTER change function into a helper.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:21:32 -07:00
Roopa Prabhu f7aa74e483 neighbour: allow admin to set NTF_ROUTER
This patch allows admin setting of NTF_ROUTER flag
on a neighbour entry. This enables external control
plane (like bgp evpn) to manage neigh entries with
NTF_ROUTER flag.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:21:32 -07:00
Saif Hasan d8e2262a50 mpls: allow routes on ip6gre devices
Summary:

This appears to be necessary and sufficient change to enable `MPLS` on
`ip6gre` tunnels (RFC4023).

This diff allows IP6GRE devices to be recognized by MPLS kernel module
and hence user can configure interface to accept packets with mpls
headers as well setup mpls routes on them.

Test Plan:

Test plan consists of multiple containers connected via GRE-V6 tunnel.
Then carrying out testing steps as below.

- Carry out necessary sysctl settings on all containers

```
sysctl -w net.mpls.platform_labels=65536
sysctl -w net.mpls.ip_ttl_propagate=1
sysctl -w net.mpls.conf.lo.input=1
```

- Establish IP6GRE tunnels

```
ip -6 tunnel add name if_1_2_1 mode ip6gre \
  local 2401:db00:21:6048:feed:0::1 \
  remote 2401:db00:21:6048:feed:0::2 key 1
ip link set dev if_1_2_1 up
sysctl -w net.mpls.conf.if_1_2_1.input=1
ip -4 addr add 169.254.0.2/31 dev if_1_2_1 scope link

ip -6 tunnel add name if_1_3_1 mode ip6gre \
  local 2401:db00:21:6048:feed:0::1 \
  remote 2401:db00:21:6048:feed:0::3 key 1
ip link set dev if_1_3_1 up
sysctl -w net.mpls.conf.if_1_3_1.input=1
ip -4 addr add 169.254.0.4/31 dev if_1_3_1 scope link
```

- Install MPLS encap rules on node-1 towards node-2

```
ip route add 192.168.0.11/32 nexthop encap mpls 32/64 \
  via inet 169.254.0.3 dev if_1_2_1
```

- Install MPLS forwarding rules on node-2 and node-3
```
// node2
ip -f mpls route add 32 via inet 169.254.0.7 dev if_2_4_1

// node3
ip -f mpls route add 64 via inet 169.254.0.12 dev if_4_3_1
```

- Ping 192.168.0.11 (node4) from 192.168.0.1 (node1) (where routing
  towards 192.168.0.1 is via IP route directly towards node1 from node4)
```
ping 192.168.0.11
```

- tcpdump on interface to capture ping packets wrapped within MPLS
  header which inturn wrapped within IP6GRE header

```
16:43:41.121073 IP6
  2401:db00:21:6048:feed::1 > 2401:db00:21:6048:feed::2:
  DSTOPT GREv0, key=0x1, length 100:
  MPLS (label 32, exp 0, ttl 255) (label 64, exp 0, [S], ttl 255)
  IP 192.168.0.1 > 192.168.0.11:
  ICMP echo request, id 1208, seq 45, length 64

0x0000:  6000 2cdb 006c 3c3f 2401 db00 0021 6048  `.,..l<?$....!`H
0x0010:  feed 0000 0000 0001 2401 db00 0021 6048  ........$....!`H
0x0020:  feed 0000 0000 0002 2f00 0401 0401 0100  ......../.......
0x0030:  2000 8847 0000 0001 0002 00ff 0004 01ff  ...G............
0x0040:  4500 0054 3280 4000 ff01 c7cb c0a8 0001  E..T2.@.........
0x0050:  c0a8 000b 0800 a8d7 04b8 002d 2d3c a05b  ...........--<.[
0x0060:  0000 0000 bcd8 0100 0000 0000 1011 1213  ................
0x0070:  1415 1617 1819 1a1b 1c1d 1e1f 2021 2223  .............!"#
0x0080:  2425 2627 2829 2a2b 2c2d 2e2f 3031 3233  $%&'()*+,-./0123
0x0090:  3435 3637                                4567
```

Signed-off-by: Saif Hasan <has@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:19:27 -07:00
David S. Miller ea49c6f0ba Merge branch 'net-sched-Add-hardware-specific-counters-to-TC-actions'
Eelco Chaudron says:

====================
net/sched: Add hardware specific counters to TC actions

Add hardware specific counters to TC actions which will be exported
through the netlink API. This makes troubleshooting TC flower offload
easier, as it possible to differentiate the packets being offloaded.

v2 - Rebased on latest net-next
====================

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:18:43 -07:00
Eelco Chaudron 28169abadb net/sched: Add hardware specific counters to TC actions
Add additional counters that will store the bytes/packets processed by
hardware. These will be exported through the netlink interface for
displaying by the iproute2 tc tool

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:18:42 -07:00
Eelco Chaudron 5e111210a4 net/core: Add new basic hardware counter
Add a new hardware specific basic counter, TCA_STATS_BASIC_HW. This can
be used to count packets/bytes processed by hardware offload.

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 12:18:42 -07:00
David S. Miller d2f85c9e1c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:

====================
pull-request: bpf 2018-09-24

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Several fixes for BPF sockmap to only allow sockets being attached in
   ESTABLISHED state, from John.

2) Fix up the license to LGPL/BSD for the libc compat header which contains
   fallback helpers that libbpf and bpftool is using, from Jakub.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 10:08:45 -07:00
David S. Miller 7ff2ea0bbf Merge branch 'mvpp2-Add-txq-to-CPU-mapping'
Maxime Chevallier says:

====================
net: mvpp2: Add txq to CPU mapping

This short series adds XPS support to the mvpp2 driver, by mapping
txqs and CPUs. This comes with a patch using round-robin scheduling
for the HW to pick the next txq to transmit from, instead of the default
fixed-priority scheduling.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 10:01:10 -07:00
Maxime Chevallier 4251ea5b8e net: mvpp2: use round-robin scheduling for TX queues on the same CPU
This commit allows each TXQ to be picked in a round-robin fashion by
the PPv2 transmit scheduling mechanism. This is opposed to the default
behaviour that prioritizes the highest numbered queues.

Suggested-by: Yan Markman <ymarkman@marvell.com>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 10:01:10 -07:00
Maxime Chevallier 0d283ab5b4 net: mvpp2: support XPS by mapping TX queues to CPUs
Since the PPv2 controller has multiple TX queues, we can spread traffic
by assining TX queues to CPUs, allowing to use XPS to balance egress
traffic between CPUs.

Suggested-by : Yan Markman <ymarkman@marvell.com>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-24 10:01:10 -07:00
Greg Kroah-Hartman 02214bfc89 media fixes for v4.19-rc5
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Merge tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Mauro briefly writes:
  "media fixes for v4.19-rc5

   some drivers and Kbuild fixes"

* tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: platform: fix cros-ec-cec build error
  media: staging/media/mt9t031/Kconfig: remove bogus entry
  media: i2c: mt9v111: Fix v4l2-ctrl error handling
  media: camss: add missing includes
  media: camss: Use managed memory allocations
  media: camss: mark PM functions as __maybe_unused
  media: af9035: prevent buffer overflow on write
  media: video_function_calls.rst: drop obsolete video-set-attributes reference
2018-09-24 15:16:41 +02:00
Friedemann Gerold d26ed6b0e5 net: aquantia: memory corruption on jumbo frames
This patch fixes skb_shared area, which will be corrupted
upon reception of 4K jumbo packets.

Originally build_skb usage purpose was to reuse page for skb to eliminate
needs of extra fragments. But that logic does not take into account that
skb_shared_info should be reserved at the end of skb data area.

In case packet data consumes all the page (4K), skb_shinfo location
overflows the page. As a consequence, __build_skb zeroed shinfo data above
the allocated page, corrupting next page.

The issue is rarely seen in real life because jumbo are normally larger
than 4K and that causes another code path to trigger.
But it 100% reproducible with simple scapy packet, like:

    sendp(IP(dst="192.168.100.3") / TCP(dport=443) \
          / Raw(RandString(size=(4096-40))), iface="enp1s0")

Fixes: 018423e90b ("net: ethernet: aquantia: Add ring support code")

Reported-by: Friedemann Gerold <f.gerold@b-c-s.de>
Reported-by: Michael Rauch <michael@rauch.be>
Signed-off-by: Friedemann Gerold <f.gerold@b-c-s.de>
Tested-by: Nikita Danilov <nikita.danilov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 22:25:25 -07:00
David S. Miller 841dfa4378 Merge branch 'netpoll-avoid-capture-effects-for-NAPI-drivers'
Eric Dumazet says:

====================
netpoll: avoid capture effects for NAPI drivers

As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC).

This capture, showing one ksoftirqd eating all cycles
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

It seems that all networking drivers that do use NAPI
for their TX completions, should not provide a ndo_poll_controller() :

Most NAPI drivers have netpoll support already handled
in core networking stack, since netpoll_poll_dev()
uses poll_napi(dev) to iterate through registered
NAPI contexts for a device.

This patch series take care of the first round, we will
handle other drivers in future rounds.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:26 -07:00
Eric Dumazet 765cdc209c tun: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

tun uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet 0825ce7031 nfp: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

nfp uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Tested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet 58e0e22bff bnxt: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

bnxt uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet d8ea6a91ad bnx2x: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

bnx2x uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ariel Elior <ariel.elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet 9c29bcd189 mlx5: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

mlx5 uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet a24b66c249 mlx4: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

mlx4 uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet 1aa28fb983 i40evf: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

i40evf uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet 158a08a694 ice: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ice uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:25 -07:00
Eric Dumazet 0542997ede igb: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

igb uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Eric Dumazet 2753166e4b ixgb: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ixgb uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

This also removes a problematic use of disable_irq() in
a context it is forbidden, as explained in commit
af3e0fcf78 ("8139too: Use disable_irq_nosync() in
rtl8139_poll_controller()")

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Eric Dumazet dda9d57e2d fm10k: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
lasts for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

fm10k uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Eric Dumazet 6f5d941eba ixgbevf: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ixgbevf uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Eric Dumazet b80e71a986 ixgbe: remove ndo_poll_controller
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

ixgbe uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Reported-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Song Liu <songliubraving@fb.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Eric Dumazet 93f62ad5e8 bonding: use netpoll_poll_dev() helper
We want to allow NAPI drivers to no longer provide
ndo_poll_controller() method, as it has been proven problematic.

team driver must not look at its presence, but instead call
netpoll_poll_dev() which factorize the needed actions.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Eric Dumazet ac3d9dd034 netpoll: make ndo_poll_controller() optional
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

It seems that all networking drivers that do use NAPI
for their TX completions, should not provide a ndo_poll_controller().

NAPI drivers have netpoll support already handled
in core networking stack, since netpoll_poll_dev()
uses poll_napi(dev) to iterate through registered
NAPI contexts for a device.

This patch allows netpoll_poll_dev() to process NAPI
contexts even for drivers not providing ndo_poll_controller(),
allowing for following patches in NAPI drivers.

Also we export netpoll_poll_dev() so that it can be called
by bonding/team drivers in following patches.

Reported-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Song Liu <songliubraving@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 21:55:24 -07:00
Petr Machata 12ba7e1045 mlxsw: Make MLXSW_SP1_FWREV_MINOR a hard requirement
Up until now, mlxsw tolerated firmware versions that weren't exactly
matching the required version, if the branch number matched. That
allowed the users to test various firmware versions as long as they were
on the right branch.

On the other hand, it made it impossible for mlxsw to put a hard lower
bound on a version that fixes all problems known to date. If a user had
a somewhat older FW version installed, mlxsw would start up just fine,
possibly performing non-optimally as it would use features that trigger
problematic behavior.

Therefore tweak the check to accept any FW version that is:

- on the same branch as the preferred version, and
- the same as or newer than the preferred version.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 12:30:01 -07:00
David S. Miller 16fdf8ba98 rds: Fix build regression.
Use DECLARE_* not DEFINE_*

Fixes: 8360ed6745 ("RDS: IB: Use DEFINE_PER_CPU_SHARED_ALIGNED for rds_ib_stats")
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-23 12:25:15 -07:00
Greg Kroah-Hartman 6bf4ca7fbc Linux 4.19-rc5 2018-09-23 19:15:18 +02:00
Greg Kroah-Hartman d02771fb16 - Fix Dialog DA9063 regulator constraints issue causing failure in probe
- Fix OMAP Device Tree compatible strings to match DT
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Merge tag 'mfd-fixes-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Lee writes:
  "MFD fixes for v4.19
   - Fix Dialog DA9063 regulator constraints issue causing failure in
     probe
   - Fix OMAP Device Tree compatible strings to match DT"

* tag 'mfd-fixes-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
  mfd: omap-usb-host: Fix dts probe of children
  mfd: da9063: Fix DT probing with constraints
2018-09-23 17:19:27 +02:00
Greg Kroah-Hartman 18d49ec3c6 xen: fixes for 4.19-rc5
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Merge tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Juergen writes:
  "xen:
   Two small fixes for xen drivers."

* tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: issue warning message when out of grant maptrack entries
  xen/x86/vpmu: Zero struct pt_regs before calling into sample handling code
2018-09-23 13:32:19 +02:00
Greg Kroah-Hartman a83f87c1d2 for-linus-20180922
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Merge tag 'for-linus-20180922' of git://git.kernel.dk/linux-block

Jens writes:
  "Just a single fix in this pull request, fixing a regression in
  /proc/diskstats caused by the unification of timestamps."

* tag 'for-linus-20180922' of git://git.kernel.dk/linux-block:
  block: use nanosecond resolution for iostat
2018-09-23 08:33:28 +02:00
Greg Kroah-Hartman 328c6333ba Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Thomas writes:
  "A set of fixes for x86:

   - Resolve the kvmclock regression on AMD systems with memory
     encryption enabled. The rework of the kvmclock memory allocation
     during early boot results in encrypted storage, which is not
     shareable with the hypervisor. Create a new section for this data
     which is mapped unencrypted and take care that the later
     allocations for shared kvmclock memory is unencrypted as well.

   - Fix the build regression in the paravirt code introduced by the
     recent spectre v2 updates.

   - Ensure that the initial static page tables cover the fixmap space
     correctly so early console always works. This worked so far by
     chance, but recent modifications to the fixmap layout can -
     depending on kernel configuration - move the relevant entries to a
     different place which is not covered by the initial static page
     tables.

   - Address the regressions and issues which got introduced with the
     recent extensions to the Intel Recource Director Technology code.

   - Update maintainer entries to document reality"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm: Expand static page table for fixmap space
  MAINTAINERS: Add X86 MM entry
  x86/intel_rdt: Add Reinette as co-maintainer for RDT
  MAINTAINERS: Add Borislav to the x86 maintainers
  x86/paravirt: Fix some warning messages
  x86/intel_rdt: Fix incorrect loop end condition
  x86/intel_rdt: Fix exclusive mode handling of MBA resource
  x86/intel_rdt: Fix incorrect loop end condition
  x86/intel_rdt: Do not allow pseudo-locking of MBA resource
  x86/intel_rdt: Fix unchecked MSR access
  x86/intel_rdt: Fix invalid mode warning when multiple resources are managed
  x86/intel_rdt: Global closid helper to support future fixes
  x86/intel_rdt: Fix size reporting of MBA resource
  x86/intel_rdt: Fix data type in parsing callbacks
  x86/kvm: Use __bss_decrypted attribute in shared variables
  x86/mm: Add .bss..decrypted section to hold shared variables
2018-09-23 08:10:12 +02:00
Greg Kroah-Hartman 52890d2afc Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Thomas writes:
  "- Provide a strerror_r wrapper so lib/bpf can be built on systems
     without _GNU_SOURCE
   - Unbreak the man page generator when building out of tree"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf Documentation: Fix out-of-tree asciidoctor man page generation
  tools lib bpf: Provide wrapper for strerror_r to build in !_GNU_SOURCE systems
2018-09-23 08:09:16 +02:00
Greg Kroah-Hartman ea092676b0 Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Thomas writes:
  "Make the EFI arm stub device tree loader default on to unbreak
  existing EFI boot loaders which do not have DTB support."

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/libstub/arm: default EFI_ARMSTUB_DTB_LOADER to y
2018-09-23 08:06:54 +02:00
David S. Miller 739d0def85 Merge branch 'hv_netvsc-Support-LRO-RSC-in-the-vSwitch'
Haiyang Zhang says:

====================
hv_netvsc: Support LRO/RSC in the vSwitch

The patch adds support for LRO/RSC in the vSwitch feature. It reduces
the per packet processing overhead by coalescing multiple TCP segments
when possible. The feature is enabled by default on VMs running on
Windows Server 2019 and later.

The patch set also adds ethtool command handler and documents.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-22 17:23:16 -07:00
Haiyang Zhang f1951c2256 hv_netvsc: Update document for LRO/RSC support
Update document for LRO/RSC support, and the command line info to
change the setting.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-22 17:23:16 -07:00
Haiyang Zhang d6792a5a07 hv_netvsc: Add handler for LRO setting change
This patch adds the handler for LRO setting change, so that a user
can use ethtool command to enable / disable LRO feature.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-22 17:23:16 -07:00
Haiyang Zhang c8e4eff467 hv_netvsc: Add support for LRO/RSC in the vSwitch
LRO/RSC in the vSwitch is a feature available in Windows Server 2019
hosts and later. It reduces the per packet processing overhead by
coalescing multiple TCP segments when possible. This patch adds netvsc
driver support for this feature.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-22 17:23:15 -07:00
Maciej Żenczykowski 474ff26008 net-ethtool: ETHTOOL_GUFO did not and should not require CAP_NET_ADMIN
So it should not fail with EPERM even though it is no longer implemented...

This is a fix for:
  (userns)$ egrep ^Cap /proc/self/status
  CapInh: 0000003fffffffff
  CapPrm: 0000003fffffffff
  CapEff: 0000003fffffffff
  CapBnd: 0000003fffffffff
  CapAmb: 0000003fffffffff

  (userns)$ tcpdump -i usb_rndis0
  tcpdump: WARNING: usb_rndis0: SIOCETHTOOL(ETHTOOL_GUFO) ioctl failed: Operation not permitted
  Warning: Kernel filter failed: Bad file descriptor
  tcpdump: can't remove kernel filter: Bad file descriptor

With this change it returns EOPNOTSUPP instead of EPERM.

See also https://github.com/the-tcpdump-group/libpcap/issues/689

Fixes: 08a00fea6d "net: Remove references to NETIF_F_UFO from ethtool."
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-22 17:11:26 -07:00
David S. Miller bd4d08daeb Merge branch 'net-dsa-b53-SGMII-modes-fixes'
Florian Fainelli says:

====================
net: dsa: b53: SGMII modes fixes

Here are two additional fixes that are required in order for SGMII to
work correctly. This was discovered with using a copper SFP which would
make us use SGMII mode, we would actually leave the HW configured in its
default mode: Fiber.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-21 20:01:20 -07:00
Florian Fainelli 55a4d2eac3 net: dsa: b53: Also include SGMII for mac_config and mac_link_state
In both 802.3z and SGMII modes we need to configure the MAC accordingly
to flip between Fiber and SGMII modes, and we need to read the MAC
status from the SGMII in-band control word.

Fixes: 0e01491de6 ("net: dsa: b53: Add SerDes support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-21 20:01:19 -07:00
Florian Fainelli 2cae8c07cb net: dsa: b53: Fix B53_SERDES_DIGITAL_CONTROL offset
Maths went wrong, to get 0x20, we need to do 0x1e + (x) * 2, not 0x18,
fix that offset so we access the correct registers. This would make us
not access the correct SerDes Digital control words, status would be
fine and so we would not be correctly flipping between Fiber and SGMII
modes resulting in incorrect status words being pulled into the SerDes
digital status register.

Fixes: 0e01491de6 ("net: dsa: b53: Add SerDes support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-21 20:01:19 -07:00
Florian Fainelli e24cf6b389 net: dsa: b53: Don't assign autonegotiation enabled
PHYLINK takes care of filing the right information into
state->an_enabled, get rid of the read from the SerDes's BMCR register.

Fixes: 0e01491de6 ("net: dsa: b53: Add SerDes support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-21 19:57:03 -07:00
Nathan Chancellor 5b9b0a80aa decnet: Remove unnecessary check for dev->name
Clang warns that the address of a pointer will always evaluated as true
in a boolean context.

net/decnet/dn_dev.c:1366:10: warning: address of array 'dev->name' will
always evaluate to 'true' [-Wpointer-bool-conversion]
                                dev->name ? dev->name : "???",
                                ~~~~~^~~~ ~
1 warning generated.

Link: https://github.com/ClangBuiltLinux/linux/issues/116
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-21 19:48:36 -07:00