Mat Martineau says:

====================
mptcp: Advertisement reliability improvement and misc. updates

Patch 1 adds a helpful debug tracepoint for outgoing MPTCP packets.

Patch 2 is a small "magic number" refactor.

Patches 3 & 4 refactor parts of the mptcp_join.sh selftest. No change in
test coverage.

Patch 5 ensures only advertised address IDs are un-advertised.

Patches 6-8 improve handling of an edge case where endpoint IDs need to
be created on-the-fly when adding subflows. Includes selftest coverage.

Patch 9 adds validation of the fullmesh flag in a MPTCP netlink command,
which was overlooked when this flag was introduced for 5.18.
====================

Link: https://lore.kernel.org/r/20220307204439.65164-1-mathew.j.martineau@linux.intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The fullmesh flag mustn't be used with the signal flag when adding an
address. This patch added the necessary flags check for this case.

Fixes: 73c762c1 ("mptcp: set fullmesh flag in pm_netlink")
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Ensure implicit endpoint are created when expected and
that the user-space can update them
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The address ID selection for MPJ subflows created in response
to incoming ADD_ADDR option is currently unreliable: it happens
at MPJ socket creation time, when the local address could be
unknown.

Additionally, if the no local endpoint is available for the local
address, a new dummy endpoint is created, confusing the user-land.

This change refactor the code to move the address ID selection inside
the rebuild_header() helper, when the local address eventually
selected by the route lookup is finally known. If the address used
is not mapped by any endpoint - and thus can't be advertised/removed
pick the id 0 instead of allocate a new endpoint.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In some edge scenarios, an MPTCP subflows can use a local address
mapped by a "implicit" endpoint created by the in-kernel path manager.

Such endpoints presence can be confusing, as it's creation is hard
to track and will prevent the later endpoint creation from the user-space
using the same address.

Define a new endpoint flag to mark implicit endpoints and allow the
user-space to replace implicit them with user-provided data at endpoint
creation time.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The in-kernel MPTCP path manager, when processing the MPTCP_PM_CMD_FLUSH_ADDR
command, generates RM_ADDR events for each known local address. While that
is allowed by the RFC, it makes unpredictable the exact number of RM_ADDR
generated when both ends flush the PM addresses.

This change restricts the RM_ADDR generation to previously explicitly
announced addresses, and adjust the expected results in a bunch of related
self-tests.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The "selftests: mptcp: improve 'fair usage on close' stability" commit
changed that self test to check the TcpAttemptFails MIB instead of
looking for TW sockets. The associated bash function wasn't renamed in
that commit because of the merge conflicts it would cause, so this
commit updates the function name as Paolo originally intended.

Cc: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Without this patch, no tests would be ran when launching:

  mptcp_join.sh -cCi

In any order or a combination with 2 of these letters.

The recommended way with getopt is first parse all options and then act.

This allows to do some actions in priority, e.g. display the help menu
and stop.

But also some global variables changing the behaviour of this selftests
 -- like the ones behind -cCi options -- can be set before running the
different tests. By doing that, we can also avoid long and unreadable
regex.
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Set subflow->data_avail with the enum value MPTCP_SUBFLOW_NODATA, instead
of using 0 directly.
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The tracepoint in get_mapping_status() only dumped the incoming mpext
fields. This patch added a new tracepoint in mptcp_sendmsg_frag() to dump
the outgoing mpext too.
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Arun Ramadoss says:

====================
net: phy: lan87xx: use genphy_read_master_slave function

LAN87xx T1 Phy has the same register field as gigabit phy for reading the
master slave configuration. But the genphy_read_master_slave function has a
check of gigabit phy. So refactored the function in such a way, moved the speed
check to the genphy_read_status function. Analyzed the nxp-tja11xx function for
refactoring, but the register for configuring master/slave is nxp specific
which is not extended phy register.
And analyzed the reusing genphy_setup_master_slave, but for LAN87xx
MASTER_ENABLE is always 1 and Preferred state is always 0. So, I didn't try to
change it.
====================

Link: https://lore.kernel.org/r/20220307161515.14970-1-arun.ramadoss@microchip.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

To read the master slave configuration of the LAN87xx T1 phy, used the
generic phy driver genphy_read_master_slave function. Removed the local
lan87xx_read_master_slave function.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

genphy_read_master_slave function allows to configure the master/slave
for gigabit phys only. In order to use this function irrespective of
speed, moved the speed check to the genphy_read_status call.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

In this situation (VLAN filtering disabled on br0):

    br0.10
     /
   br0
   / \
swp0 swp1

When a frame is transmitted from the VLAN upper, the bridge will send
it down to one of the switch ports with forward offloading
enabled. This will cause tag_dsa to generate a FORWARD tag. Before
this change, that tag would have it's VID set to 10, even though VID
10 is not loaded in the VTU.

Before the blamed commit, the frame would trigger a VTU miss and be
forwarded according to the PVT configuration. Now that all fabric
ports are in 802.1Q secure mode, the frame is dropped instead.

Therefore, restrict the condition under which we rewrite an 802.1Q tag
to a DSA tag. On standalone port's, reuse is always safe since we will
always generate FROM_CPU tags in that case. For bridged ports though,
we must ensure that VLAN filtering is enabled, which in turn
guarantees that the VID in question is loaded into the VTU.

Fixes: d352b20f ("net: dsa: mv88e6xxx: Improve multichip isolation of standalone ports")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20220307110548.812455-1-tobias@waldekranz.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

In case the MAC is using 'netif_rx()' to deliver the skb up the network
stack, it needs to check whether 'skb_defer_rx_timestmap()' is necessary
or not. In case is needed then don't call 'netif_rx()'
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://lore.kernel.org/r/20220307094632.3764266-1-horatiu.vultur@microchip.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

In case of DT-configured systems it may be hard to identify the PHY
interrupt in the /proc/interrupts output. Therefore add the name to
the id to make clearer that it's about a device on a muxed mdio bus.
In my case:

Now: mdio_mux-0.e40908ff:08
Before: 0.e40908ff:08
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/00b4bb1e-98f9-b4e7-5549-e095a4701f66@gmail.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

During the process of driver probing, probe function should return < 0
for failure, otherwise kernel will treat value >= 0 as success.

Therefore, the driver should set 'err' to -ENODEV when
'adapter->registered_device_map' is NULL. Otherwise kernel will assume
that the driver has been successfully probed and will cause unexpected
errors.
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/1646546192-32737-1-git-send-email-zheyuma97@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Pragma unroll was introduced around GCC 8, whereas current xsk code in
ice that prepares loop_unrolled_for macro that is based on mentioned
pragma, compares GCC version against 4, which is wrong and Stephen
found this out by compiling kernel with GCC 5.4 [0].

Fix this mistake and check if GCC version is >= 8.

[0]: https://lore.kernel.org/netdev/20220307213659.47658125@canb.auug.org.au/

Fixes: 126cdfe1 ("ice: xsk: Improve AF_XDP ZC Tx and use batching API")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20220307231353.56638-1-maciej.fijalkowski@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The previous check handled the "if (!nh)" condition so we know "nh"
is non-NULL here.  Delete the check and pull the code in one tab.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Roopa Prabhu <roopa@nvidia.com>
Link: https://lore.kernel.org/r/20220307125735.GC16710@kiliSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The > ARRAY_SIZE() needs to be >= ARRAY_SIZE() to prevent an out of
bounds access.

Fixes: 9f492c4c ("ptp: ocp: add TOD debug information")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/r/20220307141318.GA18867@kiliSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The clang static analyzer reports this issue
rtnetlink.c:5481:2: warning: Undefined or garbage
  value returned to caller
  return err;
  ^~~~~~~~~~

There is a function level err variable, in the
list_for_each_entry_rcu block there is a shadow
err.  Remove the shadow.

In the same block, the call to nla_nest_start_noflag()
can fail without setting an err.  Set the err
to -EMSGSIZE.

Fixes: 216e6906 ("net: rtnetlink: rtnl_fill_statsinfo(): Permit non-EMSGSIZE error returns")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Clang static analysis reports this representative issue
dsa.c:486:2: warning: Undefined or garbage value
  returned to caller
  return err;
  ^~~~~~~~~~

err is only set in the loop.  If the loop is empty,
garbage will be returned.  So initialize err to 0
to handle this noop case.
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fit the following coccicheck warning:
tools/testing/selftests/net/reuseport_bpf_numa.c:89:28-29:
WARNING: Use ARRAY_SIZE.

It has been tested with gcc (Debian 8.3.0-6) 8.3.0 on x86_64.
Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix the following coccicheck warning:
drivers/net/ethernet/netronome/nfp/nfp_net_common.c:3434:8-48: WARNING
avoid newline at end of message in NL_SET_ERR_MSG_MOD
Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

kernel test robot reports multiple warning for smc_sysctl:

  In file included from net/smc/smc_sysctl.c:17:
>> net/smc/smc_sysctl.h:23:5: warning: no previous prototype \
	for function 'smc_sysctl_init' [-Wmissing-prototypes]
  int smc_sysctl_init(void)
       ^
and
  >> WARNING: modpost: vmlinux.o(.text+0x12ced2d): Section mismatch \
  in reference from the function smc_sysctl_exit() to the variable
  .init.data:smc_sysctl_ops
  The function smc_sysctl_exit() references
  the variable __initdata smc_sysctl_ops.
  This is often because smc_sysctl_exit lacks a __initdata
  annotation or the annotation of smc_sysctl_ops is wrong.

and
  net/smc/smc_sysctl.c: In function 'smc_sysctl_init_net':
  net/smc/smc_sysctl.c:47:17: error: 'struct netns_smc' has no member named 'smc_hdr'
     47 |         net->smc.smc_hdr = register_net_sysctl(net, "net/smc", table);

Since we don't need global sysctl initialization. To make things
clean and simple, remove the global pernet_operations and
smc_sysctl_{init|exit}. Call smc_sysctl_net_{init|exit} directly
from smc_net_{init|exit}.

Also initialized sysctl_autocorking_size if CONFIG_SYSCTL it not
set, this make sure SMC autocorking is enabled by default if
CONFIG_SYSCTL is not set.

Fixes: 462791bb ("net/smc: add sysctl interface for SMC")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: David S. Miller <davem@davemloft.net>

Sebastian Andrzej Siewior says:

====================
net: Convert user to netif_rx(), part 3.

This is the third and last batch of converting netif_rx_ni() caller to
netif_rx(). The change making this possible is net-next and
netif_rx_ni() is a wrapper around netif_rx(). This is a clean up in
order to remove netif_rx_ni().

The micrel phy driver is patched twice within this series: the first is
is to replace netif_rx_ni() and second to move netif_rx() outside of the
IRQ-off section. It is probably simpler to keep it within this series.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

lan8814_match_rx_ts() invokes netif_rx() with disables interrupts
outside which will create a warning. Invoking netif_rx_ni() with
disabled interrupts is wrong even without the recent rework because
netif_rx_ni() would enable interrupts while processing the softirq. This
in turn can lead to dead lock if an interrupts triggers and attempts to
acquire kszphy_ptp_priv::rx_ts_lock.

Move netif_rx() outside the IRQ-off section.

Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Divya Koppera <Divya.Koppera@microchip.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove netif_rx_any_context and netif_rx_ni() because there are no more
users in tree.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Divya Koppera <Divya.Koppera@microchip.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Remi Denis-Courmont <courmisch@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc: linux-bluetooth@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Antonio Quartulli <a@unstable.cc>
Cc: Marek Lindner <mareklindner@neomailbox.ch>
Cc: Simon Wunderlich <sw@simonwunderlich.de>
Cc: Sven Eckelmann <sven@narfation.org>
Cc: b.a.t.m.a.n@lists.open-mesh.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Jon Maloy <jmaloy@redhat.com>
Cc: Ying Xue <ying.xue@windriver.com>
Cc: tipc-discussion@lists.sourceforge.net
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-staging@lists.linux.dev
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit
   baebdf48 ("net: dev: Makes sure netif_rx() can be invoked in any context.")

the function netif_rx() can be used in preemptible/thread context as
well as in interrupt context.

Use netif_rx().

Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandra Winter <wintera@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Wenjia Zhang <wenjia@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Kurt Kanzenbach says:

====================
ptp: Add generic is_sync() function

as multiple PHY drivers such as micrel or TI dp83640 need to inspect whether a
given skb represents a PTP Sync message, provide a generic function for it. This
avoids code duplication and can be reused by future PHY IEEE 1588 implementations.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Use generic ptp_msg_is_sync() function to avoid code duplication.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use generic ptp_msg_is_sync() function to avoid code duplication.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

PHY drivers such as micrel or dp83640 need to analyze whether a given
skb is a PTP sync message for one step functionality.

In order to avoid code duplication introduce a generic function and
move it to ptp classify.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>