Andrey reported the following warning triggered while running CRIU tests:

tcp_clean_rtx_queue()
...
	last_ackt = tcp_skb_timestamp_us(skb);
	WARN_ON_ONCE(last_ackt == 0);

This is caused by 5f6188a8 ("tcp: do not change tcp_wstamp_ns
in tcp_mstamp_refresh"), as we end up having skbs in retransmit queue
with a zero skb->skb_mstamp_ns field.

We could fix this bug in different ways, like making sure
tp->tcp_wstamp_ns is not zero at socket creation, but as Neal pointed
out, we also do not want that pacing status of a repaired socket
could push tp->tcp_wstamp_ns far ahead in the future.

So we prefer changing tcp_write_xmit() to not call tcp_update_skb_after_send()
and instead do what is requested by TCP_REPAIR logic.

Fixes: 5f6188a8 ("tcp: do not change tcp_wstamp_ns in tcp_mstamp_refresh")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds checksum offload and TSO support for the HiNIC
driver. Perfomance test (Iperf) shows more than 100% improvement
in TCP streams.
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: Xue Chaojing <xuechaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

On multi adapter setup if the uld registration fails even on
one adapter, the allocated resources for the uld on all the
adapters are freed, rendering the functioning adapters unusable.

This commit fixes the issue by freeing the allocated resources
only for the failed adapter.
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The struct type was copied from the line before but it should be "tx"
instead of "rx".  I have reviewed the code and I can't immediately see
that this bug causes a runtime issue.

Fixes: 36e53349 ("bnxt_en: Add additional extended port statistics.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
Intel Wired LAN Doc Updates 2018-10-18

This series contains documentation fixes and updates for Intel wired
LAN drivers.

The following was done:
 - Updated incorrect URLs
 - removed document references which did not apply to the current
   in-kernel drivers
 - added documentation for fm10k driver
 - added missing documentation on existing or new features
 - added SPDX headers to all the documentation files

Lastly, the documentation was converted over to the RST (reStructured
Text) format, so that 'make htmldocs' produces pretty html driver
documentation for our drivers.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Clang warns:

drivers/atm/zatm.c:513:7: error: while loop has empty body
[-Werror,-Wempty-body]
        zwait;
             ^
drivers/atm/zatm.c:513:7: note: put the semicolon on a separate line to
silence this warning

Get rid of this warning by using an empty do-while loop. While we're at
it, add parentheses to make it clear that this is a function-like macro.

Link: https://github.com/ClangBuiltLinux/linux/issues/42Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Clang warns:

drivers/atm/eni.c:244:48: error: for loop has empty body
[-Werror,-Wempty-body]
        for (order = 0; (1 << order) < *size; order++);
                                                      ^
drivers/atm/eni.c:244:48: note: put the semicolon on a separate line to
silence this warning

In this case, that loop is expected to be empty so silence the warning
in the way that Clang suggests.

Link: https://github.com/ClangBuiltLinux/linux/issues/42Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Update Shrijeet's email address for the VRF entry.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that the documents have been updated to conform to the reStructured Text
guidelines, we can now change the file extensions and update the other
related references.

This converts all of the Intel wired LAN driver documentation to *.rst.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Added the fm10k kernel documentation, which apparently was missing.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@oracle.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Add the SPDX-Lincense-Identifier to the Intel wired Ethernet *.rst
kernel documentation.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

NAPI is enabled by default and IXGB_NAPI was removed since
commit 6d37ab28 ("ixgb: make NAPI the only option and the default")
Update the doc accordingly.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Xin Long says:

====================
sctp: fix sk_wmem_queued and use it to check for writable space

sctp doesn't count and use asoc sndbuf_used, sk sk_wmem_alloc and
sk_wmem_queued properly, which also causes some problem.

This patchset is to improve it.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

sk->sk_wmem_queued is used to count the size of chunks in out queue
while sk->sk_wmem_alloc is for counting the size of chunks has been
sent. sctp is increasing both of them before enqueuing the chunks,
and using sk->sk_wmem_alloc to check for writable space.

However, sk_wmem_alloc is also increased by 1 for the skb allocked
for sending in sctp_packet_transmit() but it will not wake up the
waiters when sk_wmem_alloc is decreased in this skb's destructor.

If msg size is equal to sk_sndbuf and sendmsg is waiting for sndbuf,
the check 'msg_len <= sctp_wspace(asoc)' in sctp_wait_for_sndbuf()
will keep waiting if there's a skb allocked in sctp_packet_transmit,
and later even if this skb got freed, the waiting thread will never
get waked up.

This issue has been there since very beginning, so we change to use
sk->sk_wmem_queued to check for writable space as sk_wmem_queued is
not increased for the skb allocked for sending, also as TCP does.

SOCK_SNDBUF_LOCK check is also removed here as it's for tx buf auto
tuning which I will add in another patch.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Now it's confusing that asoc sndbuf_used is doing memory accounting with
SCTP_DATA_SNDSIZE(chunk) + sizeof(sk_buff) + sizeof(sctp_chunk) while sk
sk_wmem_alloc is doing that with skb->truesize + sizeof(sctp_chunk).

It also causes sctp_prsctp_prune to count with a wrong freed memory when
sndbuf_policy is not set.

To make this right and also keep consistent between asoc sndbuf_used, sk
sk_wmem_alloc and sk_wmem_queued, use skb->truesize + sizeof(sctp_chunk)
for them.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
1GbE Intel Wired LAN Driver Updates 2018-10-17

This series adds support for the new igc driver.

The igc driver is the new client driver supporting the Intel I225
Ethernet Controller, which supports 2.5GbE speeds.  The reason for
creating a new client driver, instead of adding support for the new
device in e1000e, is that the silicon behaves more like devices
supported in igb driver.  It also did not make sense to add a client
part, to the igb driver which supports only 1GbE server parts.

This initial set of patches is designed for basic support (i.e. link and
pass traffic).  Follow-on patch series will add more advanced support
like VLAN, Wake-on-LAN, etc..
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

mlx5-updates-2018-10-17

========================================================================

From Or Gerlitz <ogerlitz@mellanox.com>:

This series from Paul adds support to mlx5 e-switch tc offloading of multiple priorities and chains.

This is made of four building blocks (along with few minor driver refactors):

[1] Split FDB fast path prio to multiple namespaces

Currently the FDB name-space contains two priorities, fast path (p0) and slow path (p1).
The slow path contains the per representor SQ send-to-vport TX rule and the match-all
RX miss rule. As a pre-step to support multi-chains and priorities, we split the FDB fast path
to multiple namespaces  (sub namespaces), each with multiple priorities.

[2] E-Switch chains and priorities

A chain is a group of priorities. We use the fdb parallel sub-namespaces to implement chains,
and a flow table for each priority in them.

Because these namespaces are parallel and in series to the slow path
fdb, the chains aren't connected to each other (but to the slow path),
and one must use a explicit goto action to reach a different chain.

Flow tables for the priorities are created on demand and destroyed
once not used.

[3] Add a no-append flow insertion mode, use it for TC offloads

Enhance the driver fs core, such that if a no-append flag is set by the caller,
we add a new FTE, instead of appending the actions of the inserted rule when
the same match already exists.

For encap rules, we defer the HW offloading till we have a valid neighbor. This can
result in the packet hitting a lower priority rule in the HW DP. Use the no-append API
to push these packets to the slow path FDB table, so they go to the TC kernel DP as done
before priorities where supported.

[4] Offloading tc priorities and chains for eswitch flows

Using [1], [2] and [3] above we add the support for offloading both chains
and priorities. To get to a new chain, use the tc goto action. We support
a fixed prio range 1-16, and chains 0-3.
=============================================================================
Signed-off-by: David S. Miller <davem@davemloft.net>

Steffen Klassert says:

====================
pull request (net-next): ipsec-next 2018-10-18

1) Remove an unnecessary dev->tstats check in xfrmi_get_stats64.
   From Li RongQing.

2) We currently do a sizeof(element) instead of a sizeof(array)
   check when initializing the ovec array of the secpath.
   Currently this array can have only one element, so code is
   OK but error-prone. Change this to do a sizeof(array)
   check so that we can add more elements in future.
   From Li RongQing.

3) Improve xfrm IPv6 address hashing by using the complete IPv6
   addresses for a hash. From Michal Kubecek.

Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use the new API to enable usage of LLQ.
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The Kconfig limitation of X86 is to too wide.
The ENA driver only requires a little endian dependency.

Change the dependency to be on little endian CPU.
Signed-off-by: Netanel Belgazal <netanel@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Neal Cardwell says:

====================
tcp_bbr: TCP BBR changes for EDT pacing model

Two small patches for TCP BBR to follow up with Eric's recent work to change
the TCP and fq pacing machinery to an "earliest departure time" (EDT) model:

- The first patch adjusts the TCP BBR logic to work with the new
  "earliest departure time" (EDT) pacing model.

- The second patch adjusts the TCP BBR logic to centralize the setting
  of gain values, to simplify the code and prepare for future changes.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Centralize the code that sets gains used for computing cwnd and pacing
rate. This simplifies the code and makes it easier to change the state
machine or (in the future) dynamically change the gain values and
ensure that the correct gain values are always used.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Adjust TCP BBR for the new departure time pacing model in the recent
commit ab408b6d ("tcp: switch tcp and sch_fq to new earliest
departure time model").

With TSQ and pacing at lower layers, there are often several skbs
queued in the pacing layer, and thus there is less data "in the
network" than "in flight".

With departure time pacing at lower layers (e.g. fq or potential
future NICs), the data in the pacing layer now has a pre-scheduled
("baked-in") departure time that cannot be changed, even if the
congestion control algorithm decides to use a new pacing rate.

This means that there can be a non-trivial lag between when BBR makes
a pacing rate change and when the inter-skb pacing delays
change. After a pacing rate change, the number of packets in the
network can gradually evolve to be higher or lower, depending on
whether the sending rate is higher or lower than the delivery
rate. Thus ignoring this lag can cause significant overshoot, with the
flow ending up with too many or too few packets in the network.

This commit changes BBR to adapt its pacing rate based on the amount
of data in the network that it estimates has already been "baked in"
by previous departure time decisions. We estimate the number of our
packets that will be in the network at the earliest departure time
(EDT) for the next skb scheduled as:

   in_network_at_edt = inflight_at_edt - (EDT - now) * bw

If we're increasing the amount of data in the network ("in_network"),
then we want to know if the transmit of the EDT skb will push
in_network above the target, so our answer includes
bbr_tso_segs_goal() from the skb departing at EDT. If we're decreasing
in_network, then we want to know if in_network will sink too low just
before the EDT transmit, so our answer does not include the segments
from the skb departing at EDT.

Why do we treat pacing_gain > 1.0 case and pacing_gain < 1.0 case
differently? The in_network curve is a step function: in_network goes
up on transmits, and down on ACKs. To accurately predict when
in_network will go beyond our target value, this will happen on
different events, depending on whether we're concerned about
in_network potentially going too high or too low:

 o if pushing in_network up (pacing_gain > 1.0),
   then in_network goes above target upon a transmit event

 o if pushing in_network down (pacing_gain < 1.0),
   then in_network goes below target upon an ACK event

This commit changes the BBR state machine to use this estimated
"packets in network" value to make its decisions.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds OEM Broadcom commands and response handling. It also
defines OEM Get MAC Address handler to get and configure the device.

ncsi_oem_gma_handler_bcm: This handler send NCSI broadcom command for
getting mac address.
ncsi_rsp_handler_oem_bcm: This handles response received for all
broadcom OEM commands.
ncsi_rsp_handler_oem_bcm_gma: This handles get mac address response and
set it to device.
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Gustavo A. R. Silva says:

====================
fix signedness bug and memory leak in mscc driver

This patchset aims to fix a signedness bug in function
vsc85xx_downshift_get() and a memory leak in function
vsc8574_config_pre_init().

Changes in v3:
 - Add Quentin's Reviewed-by to commit log in patch 2/2.
 - Post the series to netdev.

Changes in v2:
 - Add Quentin's Reviewed-by to commit log in patch 1/2.
 - Jump to out label so all functions in the driver exit with the PHY
   set to access the standard page. Thanks to Quentin Schulz for
   pointing this out.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

In case memory resources for *fw* were successfully allocated,
release them before return.

Addresses-Coverity-ID: 1473968 ("Resource leak")
Fixes: 00d70d8e ("net: phy: mscc: add support for VSC8574 PHY")
Reviewed-by: Quentin Schulz <quentin.schulz@bootlin.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, the error handling for the call to function
phy_read_paged() doesn't work because *reg_val* is of
type u16 (16 bits, unsigned), which makes it impossible
for it to hold a value less than 0.

Fix this by changing the type of variable *reg_val* to int.

Addresses-Coverity-ID: 1473970 ("Unsigned compared against 0")
Fixes: 6a0bfbbe ("net: phy: mscc: migrate to phy_select/restore_page functions")
Reviewed-by: Quentin Schulz <quentin.schulz@bootlin.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This fixes the "'hash' may be used uninitialized in this function"

net/unix/af_unix.c:1041:20: warning: 'hash' may be used uninitialized in this function [-Wmaybe-uninitialized]
  addr->hash = hash ^ sk->sk_type;
Signed-off-by: Kyeongdon Kim <kyeongdon.kim@lge.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This is a fix for the port_set_speed method for the Topaz family.
Currently the same method is used as for the Peridot family, but
this is wrong for the SERDES port.

On Topaz, the SERDES port is port 5, not 9 and 10 as in Peridot.
Moreover setting alt_bit on Topaz only makes sense for port 0 (for
(differentiating 100mbps vs 200mbps). The SERDES port does not
support more than 2500mbps, so alt_bit does not make any difference.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

Sunil Goutham says:

====================
octeontx2-af: NPA and NIX blocks initialization

This patchset is a continuation to earlier submitted patch series
to add a new driver for Marvell's OcteonTX2 SOC's
Resource virtualization unit (RVU) admin function driver.

octeontx2-af: Add RVU Admin Function driver
https://www.spinics.net/lists/netdev/msg528272.html

This patch series adds logic for the following.
- Modified register polling loop to use time_before(jiffies, timeout),
  as suggested by Arnd Bergmann.
- Support to forward interface link status notifications sent by
  firmware to registered PFs mapped to a CGX::LMAC.
- Support to set CGX LMAC in loopback mode, retrieve stats,
  configure DMAC filters at CGX level etc.
- Network pool allocator (NPA) functional block initialization,
  admin queue support, NPALF aura/pool contexts memory allocation, init
  and deinit.
- Network interface controller (NIX) functional block basic init,
  admin queue support, NIXLF RQ/CQ/SQ HW contexts memory allocation,
  init and deinit.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>