Page recycling code and GRO packet receipt code were moved.

One function contains code extracted from another.

Code style fixes included.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The code that handles transmission finalization will also be common.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Mat Martineau says:

====================
Multipath TCP: Prerequisites

v6 -> v7: Rename/move ULP clone helper to make inline-friendly (patch 5)

v5 -> v6: Fix BPF accessors for sk_type and sk_protocol (patch 2), fix
the width of an __unused bitfield (patch 6), and add some commit message
and comment text (patches 5 & 7).

v4 -> v5: Cover letter subject fix. No changes to commits.

v3 -> v4: Update coalesce/collapse of incoming MPTCP skbs (patch 7)

v2 -> v3: Ensure sk_type alignment in struct sock (patch 2)

v1 -> v2: sk_pacing_shift left as a regular struct member (patch 2), and
modified SACK space check based on recent -net fix (patch 9).

The MPTCP upstreaming community has been collaborating on an
upstreamable MPTCP implementation that complies with RFC 8684. A minimal
set of features to comply with the specification involves a sizeable set
of code changes, so David requested that we split this work in to
multiple, smaller patch sets to build up MPTCP infrastructure.

The minimal MPTCP feature set we are proposing for review in the v5.6
timeframe begins with these three parts:

Part 1 (this patch set): MPTCP prerequisites. Introduce some MPTCP
definitions, additional ULP and skb extension features, TCP option space
checking, and a few exported symbols.

Part 2: Single subflow implementation and self tests.

Part 3: Switch from MPTCP v0 (RFC 6824) to MPTCP v1 (new RFC 8684,
publication expected in the next few days).

Additional patches for multiple subflow support, path management, active
backup, and other features are in the pipeline for submission after
making progress with the above reviews.

Clone/fetch:
https://github.com/multipath-tcp/mptcp_net-next.git (tag: netdev-v7-part1)

Browse:
https://github.com/multipath-tcp/mptcp_net-next/tree/netdev-v7-part1

Thank you for your review. You can find us at mptcp@lists.01.org and
https://is.gd/mptcp_upstream
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently we can allocate the extension only after the skb,
this change allows the user to do the opposite, will simplify
allocation failure handling from MPTCP.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Otherwise we will find stray/unexpected/old extensions value on next
iteration.

On tcp_write_xmit() we can end-up splitting an already queued skb in two
parts, via tso_fragment(). The newly created skb can be allocated via
the tx cache and an upper layer will not be aware of it, so that upper
layer cannot set the ext properly.

Resetting the ext on recycle ensures that stale data is not propagated
in to packet headers or elsewhere.

An alternative would be add an additional hook in tso_fragment() or in
sk_stream_alloc_skb() to init the ext for upper layers that need it.
Co-developed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Update the SACK check to work with zero option space available, a case
that's possible with MPTCP but not MD5+TS. Maintained only one
conditional branch for insufficient SACK space.

v1 -> v2:
- Moves the check inside the SACK branch by taking recent SACK fix:

    9424e2e7 (tcp: md5: fix potential overestimation of TCP option space)

  in to account, but modifies it to work in MPTCP scenarios beyond the
  MD5+TS corner case.
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

MPTCP will make use of tcp_send_mss() and tcp_push() when sending
data to specific TCP subflows.

tcp_request_sock_ipvX_ops and ipvX_specific will be referenced
during TCP subflow creation.
Co-developed-by: Peter Krystad <peter.krystad@linux.intel.com>
Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Coalesce and collapse of packets carrying MPTCP extensions is allowed
when the newer packet has no extension or the extensions carried by both
packets are equal.

This allows merging of TSO packet trains and even cross-TSO packets, and
does not require any additional action when moving data into existing
SKBs.

v3 -> v4:
 - allow collapsing, under mptcp_skb_can_collapse() constraint

v5 -> v6:
 - clarify MPTCP skb extensions must always be cleared at allocation
   time
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add enum value for MPTCP and update config dependencies

v5 -> v6:
 - fixed '__unused' field size
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If ULP is used on a listening socket, icsk_ulp_ops and icsk_ulp_data are
copied when the listener is cloned. Sometimes the clone is immediately
deleted, which will invoke the release op on the clone and likely
corrupt the listening socket's icsk_ulp_data.

The clone operation is invoked immediately after the clone is copied and
gives the ULP type an opportunity to set up the clone socket and its
icsk_ulp_data.

The MPTCP ULP clone will silently fallback to plain TCP on allocation
failure, so 'clone()' does not need to return an error code.

v6 -> v7:
 - move and rename ulp clone helper to make it inline-friendly
v5 -> v6:
 - clarified MPTCP clone usage in commit message
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

TCP option 30 is allocated for MPTCP by the IANA.
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

To open a MPTCP socket with socket(AF_INET, SOCK_STREAM, IPPROTO_MPTCP),
IPPROTO_MPTCP needs a value that differs from IPPROTO_TCP. The existing
IPPROTO numbers mostly map directly to IANA-specified protocol numbers.
MPTCP does not have a protocol number allocated because MPTCP packets
use the TCP protocol number. Use private number not used OTA.
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Match the 16-bit width of skbuff->protocol. Fills an 8-bit hole so
sizeof(struct sock) does not change.

Also take care of BPF field access for sk_type/sk_protocol. Both of them
are now outside the bitfield, so we can use load instructions without
further shifting/masking.

v5 -> v6:
 - update eBPF accessors, too (Intel's kbuild test robot)
v2 -> v3:
 - keep 'sk_type' 2 bytes aligned (Eric)
v1 -> v2:
 - preserve sk_pacing_shift as bit field (Eric)

Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: bpf@vger.kernel.org
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

SK_PROTOCOL_MAX is only used in two places, for DECNet and AX.25. The
limits have more to do with the those protocol definitions than they do
with the data type of sk_protocol, so remove SK_PROTOCOL_MAX and use
U8_MAX directly.
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

using correct input parameter name to fix the below warning:

net/core/flow_dissector.c:242: warning: Function parameter or member 'thoff' not described in 'skb_flow_get_icmp_tci'
net/core/flow_dissector.c:242: warning: Excess function parameter 'toff' description in 'skb_flow_get_icmp_tci'
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Multi host Mellanox cards require MAC affinity to be set
before receiving any config commands. All config commands
should also have unicast address for source address in
command header.

Adding GMA and SMAF(Set Mac Affinity) for Mellanox card
and call these in channel probe state machine if it is
defined in device tree.
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

All members of mdio_bus_data are cleared to 0 when it was obtained
by devm_kzalloc(). so It doesn't need to set phy_mask as 0 again.
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
mlxsw: Firmware version updates

This patch sets contains two firmware-related updates.

Patch #1 bumps the required firmware version in order to support 2x50
Gb/s split on SN3800 systems.

Patch #2 changes the driver to only enforce a minimum required firmware
version, which should allow us to reduce the frequency in which we need
to update the driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, the driver ensures that the firmware version found on the
device matches the branch of the required version.

Remove this limitation so that the driver will accept the required
version or a newer version, from any branch.

This will allow us to reduce the frequency in which we need to update
the required version. New firmware versions that include necessary bug
fixes will be able to work with the driver, even if they are not from
the required branch.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The version adds support for 2x50 Gb/s port split option on SN3800
systems.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ungrafting from PRIO bug fixes in net, when merged into net-next,
merge cleanly but create a build failure.  The resolution used here is
from Petr Machata.
Signed-off-by: David S. Miller <davem@davemloft.net>

Alex Maftei says:

====================
sfc: more code refactoring

Splitting more of the driver code into different files, which will
later be used in another driver for a new product.

This is a continuation to my previous patch series.
There will be another series and a stand-alone patch as well
after this.

This series in particular covers MCDI (management controller
driver interface) code.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

A few bits were extracted from other functions.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Before calling certain function pointers, check that they are non-NULL.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

One function's prototype was changed in the header.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

A function was split, the others were renamed.

Code style fixes included.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

A function was split, the others were renamed.

Code style fixes included.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

One function was renamed here, the other contains code extracted from
another.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Various functions dealing with flow control, forward error correction,
polling, port number, and PHY testing.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

They just convert between different sets of flags/registers.
Some block comments were adjusted.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The moved code handles MCDI port link state and capabilities.
Signed-off-by: Alexandru-Mihai Maftei <amaftei@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull HID fixes from Jiri Kosina:

 - fix for OOB in hiddev, from Dmitry Torokhov

 - _poll API fixes for hidraw, from Marcel Holtmann

 - functional fix for Steam driver, from Rodrigo Rivas Costa

 - a few new device IDs / device-specific quirks and other assorted
   smaller fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: steam: Fix input device disappearing
  HID: intel-ish-hid: ipc: Add Tiger Lake PCI device ID
  drivers/hid/hid-multitouch.c: fix a possible null pointer access.
  HID: wacom: Recognize new MobileStudio Pro PID
  HID: intel-ish-hid: ipc: add CMP device id
  HID: hiddev: fix mess in hiddev_open()
  HID: hid-input: clear unmapped usages
  HID: Add quirk for incorrect input length on Lenovo Y720
  HID: asus: Ignore Asus vendor-page usage-code 0xff events
  HID: ite: Add USB id match for Acer SW5-012 keyboard dock
  HID: Add quirk for Xin-Mo Dual Controller
  HID: Fix slab-out-of-bounds read in hid_field_extract
  HID: multitouch: Add LG MELF0410 I2C touchscreen support
  HID: uhid: Fix returning EPOLLOUT from uhid_char_poll
  HID: hidraw: Fix returning EPOLLOUT from hidraw_poll

This patch modify MDIO read/write functions to support
communication with C45 PHY.
Signed-off-by: Milind Parab <mparab@cadence.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull networking fixes from David Miller:

 1) Missing netns pointer init in arp_tables, from Florian Westphal.

 2) Fix normal tcp SACK being treated as D-SACK, from Pengcheng Yang.

 3) Fix divide by zero in sch_cake, from Wen Yang.

 4) Len passed to skb_put_padto() is wrong in qrtr code, from Carl
    Huang.

 5) cmd->obj.chunk is leaked in sctp code error paths, from Xin Long.

 6) cgroup bpf programs can be released out of order, fix from Roman
    Gushchin.

 7) Make sure stmmac debugfs entry name is changed when device name
    changes, from Jiping Ma.

 8) Fix memory leak in vlan_dev_set_egress_priority(), from Eric
    Dumazet.

 9) SKB leak in lan78xx usb driver, also from Eric Dumazet.

10) Ridiculous TCA_FQ_QUANTUM values configured can cause loops in fq
    packet scheduler, reject them. From Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits)
  tipc: fix wrong connect() return code
  tipc: fix link overflow issue at socket shutdown
  netfilter: ipset: avoid null deref when IPSET_ATTR_LINENO is present
  netfilter: conntrack: dccp, sctp: handle null timeout argument
  atm: eni: fix uninitialized variable warning
  macvlan: do not assume mac_header is set in macvlan_broadcast()
  net: sch_prio: When ungrafting, replace with FIFO
  mlxsw: spectrum_qdisc: Ignore grafting of invisible FIFO
  MAINTAINERS: Remove myself as co-maintainer for qcom-ethqos
  gtp: fix bad unlock balance in gtp_encap_enable_socket
  pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM
  tipc: remove meaningless assignment in Makefile
  tipc: do not add socket.o to tipc-y twice
  net: stmmac: dwmac-sun8i: Allow all RGMII modes
  net: stmmac: dwmac-sunxi: Allow all RGMII modes
  net: usb: lan78xx: fix possible skb leak
  net: stmmac: Fixed link does not need MDIO Bus
  vlan: vlan_changelink() should propagate errors
  vlan: fix memory leak in vlan_dev_set_egress_priority
  stmmac: debugfs entry name is not be changed when udev rename device name.
  ...

The `connected` value for wired devices was not properly initialized,
it must be set to `true` upon creation, because wired devices do not
generate connection events.

When a raw client (the Steam Client) uses the device, the input device
is destroyed. Then, when the raw client finishes, it must be recreated.
But since the `connected` variable was false this never happended.
Signed-off-by: Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

param->rx_mini_pending is __u32 variable, it will never
be less than zero.
Signed-off-by: yuehaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When the driver is built-in but ipv6 is a module, the flower
support produces a link error:

drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.o: In function `nfp_tunnel_keep_alive_v6':
tunnel_conf.c:(.text+0x2aa8): undefined reference to `nd_tbl'

Add a Kconfig dependency to avoid that configuration.

Fixes: 9ea9bfa1 ("nfp: flower: support ipv6 tunnel keep-alive messages from fw")
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

When the enetc driver is disabled, the mdio support fails to
get built:

drivers/net/dsa/ocelot/felix_vsc9959.o: In function `vsc9959_mdio_bus_alloc':
felix_vsc9959.c:(.text+0x19c): undefined reference to `enetc_hw_alloc'
felix_vsc9959.c:(.text+0x1d1): undefined reference to `enetc_mdio_read'
felix_vsc9959.c:(.text+0x1d8): undefined reference to `enetc_mdio_write'

Change the Makefile to enter the subdirectory for this as well.

Fixes: bdeced75 ("net: dsa: felix: Add PCS operations for PHYLINK")
Fixes: 6517798d ("enetc: Make MDIO accessors more generic and export to include/linux/fsl")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use constant EnAnaPLL for bit 14 as in vendor driver. The vendor
driver sets this bit for chip version 02 only, but I'm not aware of
any issues, so better leave it as it is.
In addition remove the useless debug message.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>