Fixes gcc '-Wunused-but-set-variable' warning:

drivers/isdn/hisax/hfc_pci.c:277:6: warning:
 variable ‘total’ set but not used [-Wunused-but-set-variable]

It never used since git history start.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The commit 60fb9567 ("udp: implement complete book-keeping for
encap_needed") introduced a severe misuse of jump label APIs, which
syzbot, as reported by Eric, was able to exploit.

When multiple sockets/process can concurrently request (and than
disable) the udp encap, we need to track the activation counter with
*_inc()/*_dec() jump label variants, or we can experience bad things
at disable time.

Fixes: 60fb9567 ("udp: implement complete book-keeping for encap_needed")
Reported-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NPaolo Abeni <pabeni@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently on dequeue() ETF only drops the first expired packet, which
causes a problem if the next packet is already expired. When this
happens, the watchdog will be configured with a time in the past, fire
straight way and the packet will finally be dropped once the dequeue()
function of the qdisc is called again.

We can save quite a few cycles and improve the overall behavior of the
qdisc if we drop all expired packets if the next packet is expired.
This should allow ETF to recover faster from bad situations. But
packet drops are still a very serious warning that the requirements
imposed on the system aren't reasonable.

This was inspired by how the implementation of hrtimers use the
rb_tree inside the kernel.
Signed-off-by: NJesus Sanchez-Palencia <jesus.s.palencia@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is just a refactor that will simplify the implementation of the
next patch in this series which will drop all expired packets on the
dequeue flow.
Signed-off-by: NJesus Sanchez-Palencia <jesus.s.palencia@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

ETF's peek() operation is heavily used so use an rb_root_cached instead
and leverage rb_first_cached() which will run in O(1) instead of
O(log n).

Even if on 'timesortedlist_clear()' we could be using rb_erase(), we
choose to use rb_erase_cached(), because if in the future we allow
runtime changes to ETF parameters, and need to do a '_clear()', this
might cause some hard to debug issues.
Signed-off-by: NJesus Sanchez-Palencia <jesus.s.palencia@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is no point in firing the qdisc watchdog if there are no future
skbs pending in the queue and the watchdog had been set previously.
Signed-off-by: NJesus Sanchez-Palencia <jesus.s.palencia@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently we can use bpf or tcp tracepoint to conveniently trace the tcp
state transition at the run time.
So we don't need to do this stuff at the compile time anymore.
Signed-off-by: NYafang Shao <laoar.shao@gmail.com>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Ben Dooks says:

====================
SMSC95xx driver updates (round 1)

This is a series of a few driver cleanups and some fixups of the code
for the SMSC95XX driver. There have been a few reviews, and the issues
have been fixed so this should be ready for merging.

I will work on the tx-alignment and the other bits of usbnet changes
and produce at least two more patch series for this later.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The manual states that the checksum cannot lie in the last DWORD of the
transmission, so add a basic check for this and fall back to software
checksumming the packet.

This only seems to trigger for ACK packets with no options or data to
return to the other end, and the use of the tx-alignment option makes
it more likely to happen.
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change the RX code to use get_unaligned_le32() instead of the combo
of memcpy and cpu_to_le32s(&var).
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The smsc95xx_tx_fixup is doing multiple calls to skb_push() to
put an 8-byte command header onto the packet. It would be easier
to do one skb_push() and then copy the data in once the push is
done.

We also make the code smaller by using proper unaligned puts for
the header. This merges in the CPU to LE32 conversion as well and
makes the whole sequence easier to understand hopefully.
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The smsc95xx driver already takes into account the NET_IP_ALIGN
parameter when setting up the receive packet data, which means
we do not need to worry about aligning the packets in the usbnet
driver.

Adding the EVENT_NO_IP_ALIGN means that the IPv4 header is now
passed to the ip_rcv() routine with the start on an aligned address.

Tested on Raspberry Pi B3.
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Ioana Ciocoi Radulescu says:

====================
dpaa2-eth: add bql support

The first two patches make minor tweaks to the driver to
simplify bql implementation. The third patch adds the actual
bql support.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for byte queue limit.

On NAPI poll, we save the total number of Tx confirmed frames/bytes
and register them with bql at the end of the poll function.
Signed-off-by: NIoana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change the frame consume callback signature:
* the entire FQ structure is passed to the callback instead
of just the queue index
* the NAPI structure can be easily obtained from the channel
it is associated to, so we don't need to pass it explicitly
Signed-off-by: NIoana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The DPNI object on which we build a network interface has a
certain number of {Rx, Tx, Tx confirmation} frame queues as
resources. The default hardware setup offers one queue of each
type, as well as one DPCON channel, for each core available
in the system.

There are however cases where the number of queues is greater
than the number of cores or channels. Until now, we configured
and used all the frame queues associated with a DPNI, even if it
meant assigning multiple queues of one type to the same channel.

Update the driver to only use a number of queues equal to the
number of channels, ensuring each channel will contain exactly
one Rx and one Tx confirmation queue.

>From the user viewpoint, this change is completely transparent.
Performance wise there is no impact in most scenarios. In case
the number of queues is larger than and not a multiple of the
number of channels, Rx hash distribution offers now better load
balancing between cores, which can have a positive impact on
overall system performance.
Signed-off-by: NIoana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, the vlan packet offloads are registered only upon 8021q module
load. However, even without this module loaded, the offloads could be
utilized, for example by openvswitch datapath. As reported by Michael,
that causes 2x to 5x performance improvement, depending on a testcase.

So move the vlan offload registrations into vlan_core and make this
available even without 8021q module loaded.
Reported-by: NMichael Shteinbok <michaelsh86@gmail.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Tested-by: NMichael Shteinbok <michaelsh86@gmail.com>
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a missing indentation before the declaration of port. Add
it.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Trivial fix, the spelling of "failded" is incorrect in dev_err and
dev_warn messages. Fix this.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Now that the icplus driver has been fixed all PHY drivers supporting
interrupts have both callbacks (config_intr and ack_interrupt)
implemented - as it should be. Therefore phy_drv_supports_irq()
can be changed now to check for both callbacks being implemented.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Michał Mirosław says:

====================
Remove VLAN.CFI overload

Fix BPF code/JITs to allow for separate VLAN_PRESENT flag
storage and finally move the flag to separate storage in skbuff.

This is final step to make CLAN.CFI transparent to core Linux
networking stack.

An #ifdef is introduced temporarily to mark fragments masking
VLAN_TAG_PRESENT. This is removed altogether in the final patch.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace VLAN_TAG_PRESENT with single bit flag and free up
VLAN.CFI overload. Now VLAN.CFI is visible in networking stack
and can be passed around intact.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Wrap VLAN_PRESENT bit using macro like PKT_TYPE_* and CLONED_*,
as used by BPF code.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Simon Wunderlich says:

====================
This feature/cleanup patchset includes the following patches:

 - Bump version strings, by Simon Wunderlich

 - Fixup includes, by Sven Eckelmann (3 patches)

 - Separate BATMAN_ADV_DEBUG from DEBUGFS, by Sven Eckelmann

 - Fixup tracing log documentation, by Sven Eckelmann

 - Use exclusive locks to secure netlink information dump transfers,
   by Sven Eckelmann (8 patches)

 - Move CRC16 dependency, by Sven Eckelmann

 - Enable MCAST by default, by Linus Luessing
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

netperf udp stream shows that eth_type_trans takes certain cpu,
so adjust the mac address check order, and firstly check if it
is device address, and only check if it is multicast address
only if not the device address.

After this change:
To unicast, and skb dst mac is device mac, this is most of time
reduce a comparision
To unicast, and skb dst mac is not device mac, nothing change
To multicast, increase a comparision

Before:
1.03%  [kernel]          [k] eth_type_trans

After:
0.78%  [kernel]          [k] eth_type_trans
Signed-off-by: NZhang Yu <zhangyu31@baidu.com>
Signed-off-by: NLi RongQing <lirongqing@baidu.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

if list is NULL pointer, and the following access of list
will trigger panic, which is same as BUG_ON
Signed-off-by: NLi RongQing <lirongqing@baidu.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2018-11-14

This series contains updates to i40e and virtchnl.

Lance Roy updates i40e to use lockdep_assert_held() instead of
spin_is_locked(), since it is better suited to check locking
requirements.

Jan improves the code readability in XDP by adding the use of a local
variable.  Provides protection on methods that create/modify/destroy
VF's via locking mechanism to prevent unstable behaviour and potential
kernel panics.

Krzysztof adds a hardware capability flag to indicate whether firmware
supports stopping the LLDP agent.

Patryk replaces the use of strncpy() with strlcpy() to ensure the buffer
is NULL terminated.

Mitch fixes the issue of trying to start nway on devices that do not
support auto-negotiation, by checking the autoneg state before
attempting to restart nway.

Alice updates virtchnl to keep the checks all together for ease of
readability and consistency.  Also fixed a "off by one" error in the
number of traffic classes being calculated.

Richard fixed VF port VLANs, where the priority bits were incorrectly
set because the incorrect shift and mask bits were being used.

Alan adds a bit to set and check if a timeout recovery is already
pending to prevent overlapping transmit timeout recovery.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

lib/test_objagg.c: In function ‘test_delta_action_item’:
./include/linux/printk.h:308:2: warning: ‘errmsg’ may be used uninitialized in this function [-Wmaybe-uninitialized]
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
mlxsw: spectrum: acl: Introduce ERP sharing by multiple masks

Jiri says:

The Spectrum-2 hardware has limitation number of ERPs per-region. In
order to accommodate more masks than number of ERPs, the hardware
supports to insert rules with delta bits. By that, the rules with masks
that differ in up-to 8 consecutive bits can share the same ERP.

Patches 1 and 2 fix couple of issues that would appear in existing
selftests after adding delta support

Patch 3 introduces a generic object aggregation library. Now it is
static, but it will get extended for recalculation of aggregations in
the future in order to reach more optimal aggregation.

Patch 4 just simply converts existing ERP code to use the objagg library
instead of a rhashtable.

Patches 5-9 do more or less small changes to prepare ground for the last
patch.

Patch 10 fills-up delta callbacks of objagg library and utilizes the
delta bits for rule insertion.

The last patch adds selftest to test the mlxsw Spectrum-2 delta flows.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Track the basic codepaths of delta handling, using objagg tracepoints.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Allow ERP sharing for multiple mask. Do it by properly implementing
delta_create() objagg object. Use the computed delta info for inserting
rules in A-TCAM.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Later on the same code is going to be needed for deltas as well. So push
the procedures related to increment and decrement of num_ctcam_erps
into a separate helpers.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since two remaining users of mlxsw_afk_encode() do not specify
block ranges to work on, remove the args. Also, key/mask is always
non-NULL now, so skip the checks.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No need to do key encoding again in
mlxsw_sp_acl_atcam_12kb_lkey_id_get(). Instead of that, introduce
a new helper that would just clear unused blocks.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change order so it is aligned with the usual case where the "write_to"
buffer comes as the first arg.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>