Merge tag 'v5.18'

Linux 5.18

Merge branches 'fixes' and 'misc' into for-linus

Merge tag 'v5.17-rc4' into for-linus

Merge with mainline to get the Intel ASoC generic helpers header and
other changes.

Merge tag 'v5.17-rc4' into next

Sync up with mainline to get the latest changes in HID subsystem.

Merge remote-tracking branch 'drm/drm-next' into drm-misc-next

First backmerge into drm-misc-next. Required for more helpers backmerged,
and to pull in 5.17 (rc2).

Signed-off-by: Maarten Lankhorst

Merge remote-tracking branch 'drm/drm-next' into drm-misc-next

First backmerge into drm-misc-next. Required for more helpers backmerged,
and to pull in 5.17 (rc2).

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

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Merge tag 'kvmarm-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 5.17, take #2

- A couple of fixes when handling an exception while a SEr

Merge tag 'kvmarm-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 5.17, take #2

- A couple of fixes when handling an exception while a SError has been
delivered

- Workaround for Cortex-A510's single-step[ erratum

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Merge drm/drm-next into drm-intel-gt-next

Backmerge to bring in 5.17-rc2 to introduce a common baseline
to merge i915_regs changes from drm-intel-next.

Signed-off-by: Joonas Lahtinen <joonas.lahtin

Merge drm/drm-next into drm-intel-gt-next

Backmerge to bring in 5.17-rc2 to introduce a common baseline
to merge i915_regs changes from drm-intel-next.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Merge drm/drm-next into drm-intel-next

Catch-up with 5.17-rc2 and trying to align with drm-intel-gt-next
for a possible topic branch for merging the split of i915_regs...

Signed-off-by: Rodrigo Viv

Merge drm/drm-next into drm-intel-next

Catch-up with 5.17-rc2 and trying to align with drm-intel-gt-next
for a possible topic branch for merging the split of i915_regs...

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Merge drm/drm-fixes into drm-misc-fixes

Backmerging drm/drm-fixes into drm-misc-fixes for v5.17-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'v5.16' into next

Sync up with mainline to bring in the latest API changes.

Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up fixes and get in line with other trees, powerpc kernel
mostly this time, but BPF as well.

Signed-off-by: Arnaldo Carvalho de

Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up fixes and get in line with other trees, powerpc kernel
mostly this time, but BPF as well.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Merge tag '5.17-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
"Core
----

- Defer freeing TCP skbs to the BH handler,

Merge tag '5.17-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
"Core
----

- Defer freeing TCP skbs to the BH handler, whenever possible, or at
least perform the freeing outside of the socket lock section to
decrease cross-CPU allocator work and improve latency.

- Add netdevice refcount tracking to locate sources of netdevice and
net namespace refcount leaks.

- Make Tx watchdog less intrusive - avoid pausing Tx and restarting
all queues from a single CPU removing latency spikes.

- Various small optimizations throughout the stack from Eric Dumazet.

- Make netdev->dev_addr[] constant, force modifications to go via
appropriate helpers to allow us to keep addresses in ordered data
structures.

- Replace unix_table_lock with per-hash locks, improving performance
of bind() calls.

- Extend skb drop tracepoint with a drop reason.

- Allow SO_MARK and SO_PRIORITY setsockopt under CAP_NET_RAW.

BPF
---

- New helpers:
- bpf_find_vma(), find and inspect VMAs for profiling use cases
- bpf_loop(), runtime-bounded loop helper trading some execution
time for much faster (if at all converging) verification
- bpf_strncmp(), improve performance, avoid compiler flakiness
- bpf_get_func_arg(), bpf_get_func_ret(), bpf_get_func_arg_cnt()
for tracing programs, all inlined by the verifier

- Support BPF relocations (CO-RE) in the kernel loader.

- Further the support for BTF_TYPE_TAG annotations.

- Allow access to local storage in sleepable helpers.

- Convert verifier argument types to a composable form with different
attributes which can be shared across types (ro, maybe-null).

- Prepare libbpf for upcoming v1.0 release by cleaning up APIs,
creating new, extensible ones where missing and deprecating those
to be removed.

Protocols
---------

- WiFi (mac80211/cfg80211):
- notify user space about long "come back in N" AP responses,
allow it to react to such temporary rejections
- allow non-standard VHT MCS 10/11 rates
- use coarse time in airtime fairness code to save CPU cycles

- Bluetooth:
- rework of HCI command execution serialization to use a common
queue and work struct, and improve handling errors reported in
the middle of a batch of commands
- rework HCI event handling to use skb_pull_data, avoiding packet
parsing pitfalls
- support AOSP Bluetooth Quality Report

- SMC:
- support net namespaces, following the RDMA model
- improve connection establishment latency by pre-clearing buffers
- introduce TCP ULP for automatic redirection to SMC

- Multi-Path TCP:
- support ioctls: SIOCINQ, OUTQ, and OUTQNSD
- support socket options: IP_TOS, IP_FREEBIND, IP_TRANSPARENT,
IPV6_FREEBIND, and IPV6_TRANSPARENT, TCP_CORK and TCP_NODELAY
- support cmsgs: TCP_INQ
- improvements in the data scheduler (assigning data to subflows)
- support fastclose option (quick shutdown of the full MPTCP
connection, similar to TCP RST in regular TCP)

- MCTP (Management Component Transport) over serial, as defined by
DMTF spec DSP0253 - "MCTP Serial Transport Binding".

Driver API
----------

- Support timestamping on bond interfaces in active/passive mode.

- Introduce generic phylink link mode validation for drivers which
don't have any quirks and where MAC capability bits fully express
what's supported. Allow PCS layer to participate in the validation.
Convert a number of drivers.

- Add support to set/get size of buffers on the Rx rings and size of
the tx copybreak buffer via ethtool.

- Support offloading TC actions as first-class citizens rather than
only as attributes of filters, improve sharing and device resource
utilization.

- WiFi (mac80211/cfg80211):
- support forwarding offload (ndo_fill_forward_path)
- support for background radar detection hardware
- SA Query Procedures offload on the AP side

New hardware / drivers
----------------------

- tsnep - FPGA based TSN endpoint Ethernet MAC used in PLCs with
real-time requirements for isochronous communication with protocols
like OPC UA Pub/Sub.

- Qualcomm BAM-DMUX WWAN - driver for data channels of modems
integrated into many older Qualcomm SoCs, e.g. MSM8916 or MSM8974
(qcom_bam_dmux).

- Microchip LAN966x multi-port Gigabit AVB/TSN Ethernet Switch driver
with support for bridging, VLANs and multicast forwarding
(lan966x).

- iwlmei driver for co-operating between Intel's WiFi driver and
Intel's Active Management Technology (AMT) devices.

- mse102x - Vertexcom MSE102x Homeplug GreenPHY chips

- Bluetooth:
- MediaTek MT7921 SDIO devices
- Foxconn MT7922A
- Realtek RTL8852AE

Drivers
-------

- Significantly improve performance in the datapaths of: lan78xx,
ax88179_178a, lantiq_xrx200, bnxt.

- Intel Ethernet NICs:
- igb: support PTP/time PEROUT and EXTTS SDP functions on
82580/i354/i350 adapters
- ixgbevf: new PF -> VF mailbox API which avoids the risk of
mailbox corruption with ESXi
- iavf: support configuration of VLAN features of finer
granularity, stacked tags and filtering
- ice: PTP support for new E822 devices with sub-ns precision
- ice: support firmware activation without reboot

- Mellanox Ethernet NICs (mlx5):
- expose control over IRQ coalescing mode (CQE vs EQE) via ethtool
- support TC forwarding when tunnel encap and decap happen between
two ports of the same NIC
- dynamically size and allow disabling various features to save
resources for running in embedded / SmartNIC scenarios

- Broadcom Ethernet NICs (bnxt):
- use page frag allocator to improve Rx performance
- expose control over IRQ coalescing mode (CQE vs EQE) via ethtool

- Other Ethernet NICs:
- amd-xgbe: add Ryzen 6000 (Yellow Carp) Ethernet support

- Microsoft cloud/virtual NIC (mana):
- add XDP support (PASS, DROP, TX)

- Mellanox Ethernet switches (mlxsw):
- initial support for Spectrum-4 ASICs
- VxLAN with IPv6 underlay

- Marvell Ethernet switches (prestera):
- support flower flow templates
- add basic IP forwarding support

- NXP embedded Ethernet switches (ocelot & felix):
- support Per-Stream Filtering and Policing (PSFP)
- enable cut-through forwarding between ports by default
- support FDMA to improve packet Rx/Tx to CPU

- Other embedded switches:
- hellcreek: improve trapping management (STP and PTP) packets
- qca8k: support link aggregation and port mirroring

- Qualcomm 802.11ax WiFi (ath11k):
- qca6390, wcn6855: enable 802.11 power save mode in station mode
- BSS color change support
- WCN6855 hw2.1 support
- 11d scan offload support
- scan MAC address randomization support
- full monitor mode, only supported on QCN9074
- qca6390/wcn6855: report signal and tx bitrate
- qca6390: rfkill support
- qca6390/wcn6855: regdb.bin support

- Intel WiFi (iwlwifi):
- support SAR GEO Offset Mapping (SGOM) and Time-Aware-SAR (TAS)
in cooperation with the BIOS
- support for Optimized Connectivity Experience (OCE) scan
- support firmware API version 68
- lots of preparatory work for the upcoming Bz device family

- MediaTek WiFi (mt76):
- Specific Absorption Rate (SAR) support
- mt7921: 160 MHz channel support

- RealTek WiFi (rtw88):
- Specific Absorption Rate (SAR) support
- scan offload

- Other WiFi NICs
- ath10k: support fetching (pre-)calibration data from nvmem
- brcmfmac: configure keep-alive packet on suspend
- wcn36xx: beacon filter support"

* tag '5.17-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2048 commits)
tcp: tcp_send_challenge_ack delete useless param `skb`
net/qla3xxx: Remove useless DMA-32 fallback configuration
rocker: Remove useless DMA-32 fallback configuration
hinic: Remove useless DMA-32 fallback configuration
lan743x: Remove useless DMA-32 fallback configuration
net: enetc: Remove useless DMA-32 fallback configuration
cxgb4vf: Remove useless DMA-32 fallback configuration
cxgb4: Remove useless DMA-32 fallback configuration
cxgb3: Remove useless DMA-32 fallback configuration
bnx2x: Remove useless DMA-32 fallback configuration
et131x: Remove useless DMA-32 fallback configuration
be2net: Remove useless DMA-32 fallback configuration
vmxnet3: Remove useless DMA-32 fallback configuration
bna: Simplify DMA setting
net: alteon: Simplify DMA setting
myri10ge: Simplify DMA setting
qlcnic: Simplify DMA setting
net: allwinner: Fix print format
page_pool: remove spinlock in page_pool_refill_alloc_cache()
amt: fix wrong return type of amt_send_membership_update()
...

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Merge branch 'for-next' into for-linus

Pull 5.17 materials.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

Merge drm/drm-next into drm-misc-next-fixes

Backmerging to bring drm-misc-next-fixes up to the latest state for
the current release cycle.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge branch 'reset/of-get-optional-exclusive' of git://git.pengutronix.de/pza/linux into timers/drivers/next

"Add optional variant of of_reset_control_get_exclusive(). If the
requested reset is not

Merge branch 'reset/of-get-optional-exclusive' of git://git.pengutronix.de/pza/linux into timers/drivers/next

"Add optional variant of of_reset_control_get_exclusive(). If the
requested reset is not specified in the device tree, this function
returns NULL instead of an error."

This dependency is needed for the Generic Timer Module (a.k.a OSTM)
support for RZ/G2L.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

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Merge branch 'mptcp-new-features-for-mptcp-sockets-and-netlink-pm'

Mat Martineau says:

====================
mptcp: New features for MPTCP sockets and netlink PM

This collection of patches adds MPT

Merge branch 'mptcp-new-features-for-mptcp-sockets-and-netlink-pm'

Mat Martineau says:

====================
mptcp: New features for MPTCP sockets and netlink PM

This collection of patches adds MPTCP socket support for a few socket
options, ioctls, and one ancillary data type (specifics for each are
listed below). There's also a patch modifying the netlink MPTCP path
manager API to allow setting the backup flag on a configured interface
using the endpoint ID instead of the full IP address.

Patches 1 & 2: TCP_INQ cmsg and selftests.

Patches 2 & 3: SIOCINQ, OUTQ, and OUTQNSD ioctls and selftests.

Patch 5: Change backup flag using endpoint ID.

Patches 6 & 7: IP_TOS socket option and selftests.

Patches 8-10: TCP_CORK and TCP_NODELAY socket options. Includes a tcp
change to expose __tcp_sock_set_cork() and __tcp_sock_set_nodelay() for
use by MPTCP.
====================

Link: https://lore.kernel.org/r/20211203223541.69364-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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selftests: mptcp: add inq test case

client & server use a unix socket connection to communicate
outside of the mptcp connection.

This allows the consumer to know in advance how many bytes have been

selftests: mptcp: add inq test case

client & server use a unix socket connection to communicate
outside of the mptcp connection.

This allows the consumer to know in advance how many bytes have been
(or will be) sent by the peer.
This allows stricter checks on the bytecounts reported by TCP_INQ cmsg.

Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Merge drm/drm-next into drm-intel-next

Sync up with drm-next to get v5.16-rc2.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-intel-gt-next

Thomas needs the dma_resv_for_each_fence API for i915/ttm async migration
work.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

Merge drm/drm-next into drm-misc-next

Backmerging from drm/drm-next for v5.16-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge drm/drm-fixes into drm-misc-fixes

We need -rc1 to address a breakage in drm/scheduler affecting panfrost.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up some tools/perf/ patches that went via tip/perf/core, such
as:

tools/perf: Add mem_hops field in perf_mem_data_src structu

Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up some tools/perf/ patches that went via tip/perf/core, such
as:

tools/perf: Add mem_hops field in perf_mem_data_src structure

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Merge tag 'net-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
"Core:

- Remove socket skb caches

- Add a SO_RESE

Merge tag 'net-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
"Core:

- Remove socket skb caches

- Add a SO_RESERVE_MEM socket op to forward allocate buffer space and
avoid memory accounting overhead on each message sent

- Introduce managed neighbor entries - added by control plane and
resolved by the kernel for use in acceleration paths (BPF / XDP
right now, HW offload users will benefit as well)

- Make neighbor eviction on link down controllable by userspace to
work around WiFi networks with bad roaming implementations

- vrf: Rework interaction with netfilter/conntrack

- fq_codel: implement L4S style ce_threshold_ect1 marking

- sch: Eliminate unnecessary RCU waits in mini_qdisc_pair_swap()

BPF:

- Add support for new btf kind BTF_KIND_TAG, arbitrary type tagging
as implemented in LLVM14

- Introduce bpf_get_branch_snapshot() to capture Last Branch Records

- Implement variadic trace_printk helper

- Add a new Bloomfilter map type

- Track <8-byte scalar spill and refill

- Access hw timestamp through BPF's __sk_buff

- Disallow unprivileged BPF by default

- Document BPF licensing

Netfilter:

- Introduce egress hook for looking at raw outgoing packets

- Allow matching on and modifying inner headers / payload data

- Add NFT_META_IFTYPE to match on the interface type either from
ingress or egress

Protocols:

- Multi-Path TCP:
- increase default max additional subflows to 2
- rework forward memory allocation
- add getsockopts: MPTCP_INFO, MPTCP_TCPINFO, MPTCP_SUBFLOW_ADDRS

- MCTP flow support allowing lower layer drivers to configure msg
muxing as needed

- Automatic Multicast Tunneling (AMT) driver based on RFC7450

- HSR support the redbox supervision frames (IEC-62439-3:2018)

- Support for the ip6ip6 encapsulation of IOAM

- Netlink interface for CAN-FD's Transmitter Delay Compensation

- Support SMC-Rv2 eliminating the current same-subnet restriction, by
exploiting the UDP encapsulation feature of RoCE adapters

- TLS: add SM4 GCM/CCM crypto support

- Bluetooth: initial support for link quality and audio/codec offload

Driver APIs:

- Add a batched interface for RX buffer allocation in AF_XDP buffer
pool

- ethtool: Add ability to control transceiver modules' power mode

- phy: Introduce supported interfaces bitmap to express MAC
capabilities and simplify PHY code

- Drop rtnl_lock from DSA .port_fdb_{add,del} callbacks

New drivers:

- WiFi driver for Realtek 8852AE 802.11ax devices (rtw89)

- Ethernet driver for ASIX AX88796C SPI device (x88796c)

Drivers:

- Broadcom PHYs
- support 72165, 7712 16nm PHYs
- support IDDQ-SR for additional power savings

- PHY support for QCA8081, QCA9561 PHYs

- NXP DPAA2: support for IRQ coalescing

- NXP Ethernet (enetc): support for software TCP segmentation

- Renesas Ethernet (ravb) - support DMAC and EMAC blocks of
Gigabit-capable IP found on RZ/G2L SoC

- Intel 100G Ethernet
- support for eswitch offload of TC/OvS flow API, including
offload of GRE, VxLAN, Geneve tunneling
- support application device queues - ability to assign Rx and Tx
queues to application threads
- PTP and PPS (pulse-per-second) extensions

- Broadcom Ethernet (bnxt)
- devlink health reporting and device reload extensions

- Mellanox Ethernet (mlx5)
- offload macvlan interfaces
- support HW offload of TC rules involving OVS internal ports
- support HW-GRO and header/data split
- support application device queues

- Marvell OcteonTx2:
- add XDP support for PF
- add PTP support for VF

- Qualcomm Ethernet switch (qca8k): support for QCA8328

- Realtek Ethernet DSA switch (rtl8366rb)
- support bridge offload
- support STP, fast aging, disabling address learning
- support for Realtek RTL8365MB-VC, a 4+1 port 10M/100M/1GE switch

- Mellanox Ethernet/IB switch (mlxsw)
- multi-level qdisc hierarchy offload (e.g. RED, prio and shaping)
- offload root TBF qdisc as port shaper
- support multiple routing interface MAC address prefixes
- support for IP-in-IP with IPv6 underlay

- MediaTek WiFi (mt76)
- mt7921 - ASPM, 6GHz, SDIO and testmode support
- mt7915 - LED and TWT support

- Qualcomm WiFi (ath11k)
- include channel rx and tx time in survey dump statistics
- support for 80P80 and 160 MHz bandwidths
- support channel 2 in 6 GHz band
- spectral scan support for QCN9074
- support for rx decapsulation offload (data frames in 802.3
format)

- Qualcomm phone SoC WiFi (wcn36xx)
- enable Idle Mode Power Save (IMPS) to reduce power consumption
during idle

- Bluetooth driver support for MediaTek MT7922 and MT7921

- Enable support for AOSP Bluetooth extension in Qualcomm WCN399x and
Realtek 8822C/8852A

- Microsoft vNIC driver (mana)
- support hibernation and kexec

- Google vNIC driver (gve)
- support for jumbo frames
- implement Rx page reuse

Refactor:

- Make all writes to netdev->dev_addr go thru helpers, so that we can
add this address to the address rbtree and handle the updates

- Various TCP cleanups and optimizations including improvements to
CPU cache use

- Simplify the gnet_stats, Qdisc stats' handling and remove
qdisc->running sequence counter

- Driver changes and API updates to address devlink locking
deficiencies"

* tag 'net-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2122 commits)
Revert "net: avoid double accounting for pure zerocopy skbs"
selftests: net: add arp_ndisc_evict_nocarrier
net: ndisc: introduce ndisc_evict_nocarrier sysctl parameter
net: arp: introduce arp_evict_nocarrier sysctl parameter
libbpf: Deprecate AF_XDP support
kbuild: Unify options for BTF generation for vmlinux and modules
selftests/bpf: Add a testcase for 64-bit bounds propagation issue.
bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit.
bpf: Fix propagation of bounds from 64-bit min/max into 32-bit and var_off.
net: vmxnet3: remove multiple false checks in vmxnet3_ethtool.c
net: avoid double accounting for pure zerocopy skbs
tcp: rename sk_wmem_free_skb
netdevsim: fix uninit value in nsim_drv_configure_vfs()
selftests/bpf: Fix also no-alu32 strobemeta selftest
bpf: Add missing map_delete_elem method to bloom filter map
selftests/bpf: Add bloom map success test for userspace calls
bpf: Add alignment padding for "map_extra" + consolidate holes
bpf: Bloom filter map naming fixups
selftests/bpf: Add test cases for struct_ops prog
bpf: Add dummy BPF STRUCT_OPS for test purpose
...

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Merge branch 'mptcp-next'

Mat Martineau says:

====================
mptcp: Add SOL_MPTCP getsockopt support

Here's the first new MPTCP feature for the v5.16 cycle, and I'll defer
to Florian's helpf

Merge branch 'mptcp-next'

Mat Martineau says:

====================
mptcp: Add SOL_MPTCP getsockopt support

Here's the first new MPTCP feature for the v5.16 cycle, and I'll defer
to Florian's helpful description of the series implementing some new
MPTCP socket options:

========

This adds the MPTCP_INFO, MPTCP_TCPINFO and MPTCP_SUBFLOW_ADDRS
mptcp getsockopt optnames.

MPTCP_INFO exposes the mptcp_info struct as an alternative to the
existing netlink diag interface.

MPTCP_TCPINFO exposes the tcp_info struct.
Unlike SOL_TCP/TCP_INFO, this returns one struct for each active
subflow.

MPTCP_SUBFLOW_ADDRS allows userspace to discover the ip addresses/ports
used by the local and remote endpoints, one for each active tcp subflow.

MPTCP_TCPINFO and MPTCP_SUBFLOW_ADDRS share the same meta-header that
needs to be pre-filled by userspace with the size of the data structures
it expects. This is done to allow extension of the involved structs
later on, without breaking backwards compatibility.

The meta-structure can also be used to discover the required space
to obtain all information, as kernel will fill in the number of
active subflows even if there is not enough room for the requested info
itself.

More information is available in the individual patches.
Last patch adds test cases for the three optnames.

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

Signed-off-by: David S. Miller <davem@davemloft.net>

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selftests: mptcp: add mptcp getsockopt test cases

Add a test program that retrieves the three info types:
1. mptcp meta information
2. tcp info for subflow
3. subflow endpoint addresses

For all thr

selftests: mptcp: add mptcp getsockopt test cases

Add a test program that retrieves the three info types:
1. mptcp meta information
2. tcp info for subflow
3. subflow endpoint addresses

For all three rudimentary checks are added.

1. Meta information checks that the logical mptcp
sequence numbers advance as expected, based on the bytes read
(init seq + bytes_received/sent) and the connection state
(after close, we should exect 1 extra byte due to FIN).

2. TCP info checks the number of bytes sent/received vs.
sums of read/write syscall return values.

3. Subflow endpoint addresses are checked vs. getsockname/getpeername
result.

Tests for forward compatibility (0-initialisation of output-only
fields in mptcp_subflow_data structure) are added as well.

Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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