In l2tp_core.c both l2tp_tunnel_create and l2tp_session_create take
quite a number of arguments and have a correspondingly long prototype.

This is both quite difficult to scan visually, and triggers checkpatch
warnings.

Add a line break to make these function prototypes more readable.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

checkpatch warns about use of seq_printf where seq_puts would do.

Modify l2tp_debugfs accordingly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use BIT(x) rather than (1<<x), reported by checkpatch.pl.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Reported by checkpatch:

        "WARNING: function definition argument 'struct sock *'
         should also have an identifier name"

Add an identifier name to help document the prototype.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

l2tp_core has conditionally compiled code in l2tp_xmit_skb for IPv6
support.  The structure of this code triggered a checkpatch warning
due to incorrect indentation.

Fix up the indentation to address the checkpatch warning.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Arguments should be aligned with the function call open parenthesis as
per checkpatch.  Tweak some function calls which were not aligned
correctly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Some l2tp code had line breaks which made the code more difficult to
read.  These were originally motivated by the 80-character line width
coding guidelines, but were actually a negative from the perspective of
trying to follow the code.

Remove these linebreaks for clearer code, even if we do exceed 80
characters in width in some places.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Modify some l2tp comments to better adhere to kernel coding style, as
reported by checkpatch.pl.

Add descriptive comments for the l2tp per-net spinlocks to document
their use.

Fix an incorrect comment in l2tp_recv_common:

RFC2661 section 5.4 states that:

"The LNS controls enabling and disabling of sequence numbers by sending a
data message with or without sequence numbers present at any time during
the life of a session."

l2tp handles this correctly in l2tp_recv_common, but the comment around
the code was incorrect and confusing.  Fix up the comment accordingly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix up various whitespace issues as reported by checkpatch.pl:

 * remove spaces around operators where appropriate,
 * add missing blank lines following declarations,
 * remove multiple blank lines, or trailing blank lines at the end of
   functions.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently devlink instance is searched on all doit() operations.
But it is optionally stored into user_ptr[0]. This requires
rediscovering devlink again doing post_doit().

Few devlink commands related to port shared buffers needs 3 pointers
(devlink, devlink_port, and devlink_sb) while executing doit commands.
Though devlink pointer can be derived from the devlink_port during
post_doit() operation when doit() callback has acquired devlink
instance lock, relying on such scheme to access devlik pointer makes
code very fragile.

Hence, to avoid ambiguity in post_doit() and to avoid searching
devlink instance again, simplify code by always storing devlink
instance in user_ptr[0] and derive devlink_sb pointer in their
respective callback routines.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Vlan tagged packets are getting dropped when used with DPDK that uses
the AF_PACKET interface on a hyperV guest.

The packet layer uses the tpacket interface to communicate the vlans
information to the upper layers. On Rx path, these drivers can read the
vlan info from the tpacket header but on the Tx path, this information
is still within the packet frame and requires the paravirtual drivers to
push this back into the NDIS header which is then used by the host OS to
form the packet.

This transition from the packet frame to NDIS header is currently missing
hence causing the host OS to drop the all vlan tagged packets sent by
the drivers that use AF_PACKET (ETH_P_ALL) such as DPDK.

Here is an overview of the changes in the vlan header in the packet path:

The RX path (userspace handles everything):
  1. RX VLAN packet is stripped by HOST OS and placed in NDIS header
  2. Guest Kernel RX hv_netvsc packets and moves VLAN info from NDIS
     header into kernel SKB
  3. Kernel shares packets with user space application with PACKET_MMAP.
     The SKB VLAN info is copied to tpacket layer and indication set
     TP_STATUS_VLAN_VALID.
  4. The user space application will re-insert the VLAN info into the frame

The TX path:
  1. The user space application has the VLAN info in the frame.
  2. Guest kernel gets packets from the application with PACKET_MMAP.
  3. The kernel later sends the frame to the hv_netvsc driver. The only way
     to send VLANs is when the SKB is setup & the VLAN is stripped from the
     frame.
  4. TX VLAN is re-inserted by HOST OS based on the NDIS header. If it sees
     a VLAN in the frame the packet is dropped.

Cc: xe-linux-external@cisco.com
Cc: Sriram Krishnan <srirakr2@cisco.com>
Signed-off-by: Sriram Krishnan <srirakr2@cisco.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Otherwise the 'chain_len' filed will carry random values,
some token creation calls will fail due to excessive chain
length, causing unexpected fallback to TCP.

Fixes: 2c5ebd00 ("mptcp: refactor token container")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Tested-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The variable current_head_index is being initialized with a value that
is never read and it is being updated later with a new value.  Replace
the initialization of -1 with the latter assignment.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

enetc_imdio_remove() is missing from the enetc_pf_probe()
bailout path. Not surprisingly because enetc_setup_serdes()
is registering the imdio bus for internal purposes, and it's
not obvious that enetc_imdio_remove() currently performs the
teardown of enetc_setup_serdes().
To fix this, define enetc_teardown_serdes() to wrap
enetc_imdio_remove() (improve code maintenance) and call it
on bailout and remove paths.

Fixes: 975d183e ("net: enetc: Initialize SerDes for SGMII and USXGMII protocols")
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove casting the values returned by memory allocation function.

Coccinelle emits WARNING: casting value returned by memory allocation
unction to (struct roce_destroy_qp_req_output_params *) is useless.

This issue was detected by using the Coccinelle software.
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After the patch below, the iteration through the available MMDs is
completely short-circuited, and devs_in_pkg remains set to the initial
value of zero.

Due to devs_in_pkg being zero, the rest of get_phy_c45_ids() is
short-circuited too: the following loop never reaches below this point
either (it executes "continue" for every device in package, failing to
retrieve PHY ID for any of them):

	/* Now probe Device Identifiers for each device present. */
	for (i = 1; i < num_ids; i++) {
		if (!(devs_in_pkg & (1 << i)))
			continue;

So c45_ids->device_ids remains populated with zeroes. This causes an
Aquantia AQR412 PHY (same as any C45 PHY would, in fact) to be probed by
the Generic PHY driver.

The issue seems to be a case of submitting partially committed work (and
therefore testing something other than was submitted).

The intention of the patch was to delay exiting the loop until one more
condition is reached (the devs_in_pkg read from hardware is either 0, OR
mostly f's). So fix the patch to reflect that.

Tested with traffic on a LS1028A-QDS, the PHY is now probed correctly
using the Aquantia driver. The devs_in_pkg bit field is set to
0xe000009a, and the MMDs that are present have the following IDs:

[    5.600772] libphy: get_phy_c45_ids: device_ids[1]=0x3a1b662
[    5.618781] libphy: get_phy_c45_ids: device_ids[3]=0x3a1b662
[    5.630797] libphy: get_phy_c45_ids: device_ids[4]=0x3a1b662
[    5.654535] libphy: get_phy_c45_ids: device_ids[7]=0x3a1b662
[    5.791723] libphy: get_phy_c45_ids: device_ids[29]=0x3a1b662
[    5.804050] libphy: get_phy_c45_ids: device_ids[30]=0x3a1b662
[    5.816375] libphy: get_phy_c45_ids: device_ids[31]=0x0

[    7.690237] mscc_felix 0000:00:00.5: PHY [0.5:00] driver [Aquantia AQR412] (irq=POLL)
[    7.704739] mscc_felix 0000:00:00.5: PHY [0.5:01] driver [Aquantia AQR412] (irq=POLL)
[    7.718918] mscc_felix 0000:00:00.5: PHY [0.5:02] driver [Aquantia AQR412] (irq=POLL)
[    7.733044] mscc_felix 0000:00:00.5: PHY [0.5:03] driver [Aquantia AQR412] (irq=POLL)

Fixes: bba238ed ("net: phy: continue searching for C45 MMDs even if first returned ffff:ffff")
Reported-by: Colin King <colin.king@canonical.com>
Reported-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

This adds support for the SIOCOUTQ IOCTL to get the send buffer fill
of a DCCP socket, like UDP and TCP sockets already have.

Regarding the used data field: DCCP uses per packet sequence numbers,
not per byte, so sequence numbers can't be used like in TCP. sk_wmem_queued
is not used by DCCP and always 0, even in test on highly congested paths.
Therefore this uses sk_wmem_alloc like in UDP.
Signed-off-by: Richard Sailer <richard_siegfried@systemli.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Kurt Kanzenbach says:

====================
Add DSA yaml binding

as discussed [1] [2] it makes sense to add a DSA yaml binding. This is the
second version and contains now two ways of specifying the switch ports: Either
by "ports" or by "ethernet-ports". That is why the third patch also adjusts the
DSA core for it.

Tested in combination with the hellcreek.yaml file.

Changes since v1:

 * Use select to not match unrelated switches
 * Allow ethernet-port(s)
 * List ethernet-controller properties
 * Include better description
 * Let dsa.txt refer to dsa.yaml

Thanks,
Kurt

[1] - https://lkml.kernel.org/netdev/449f0a03-a91d-ae82-b31f-59dfd1457ec5@gmail.com/
[2] - https://lkml.kernel.org/netdev/20200710090618.28945-1-kurt@linutronix.de/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Due to unified Ethernet Switch Device Tree Bindings allow for ethernet-ports as
encapsulating node as well.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

The DSA bindings have been converted to YAML. Therefore, the old text style
documentation should refer to that one.

The text file can be removed completely once all the existing DSA switch
bindings have been converted as well.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

For future DSA drivers it makes sense to add a generic DSA yaml binding which
can be used then. This was created using the properties from dsa.txt. It
includes the ports and the dsa,member property.
Suggested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

The VSC7514 is marketed as a 10-port switch, however it has 11 physical
ports (0->10) in the block diagram:
https://www.microsemi.com/product-directory/ethernet-switches/3992-vsc7514
(also in the device tree at arch/mips/boot/dts/mscc/ocelot.dtsi)

Additionally, by architecture it has one more entry in the analyzer
block, situated right after the physical ports, for the CPU port module.
This is not a physical port, it only represents a channel for frame
injection and extraction. That entry for the CPU port is at index 11 in
the analyzer.

When the register groups for QSYS_SWITCH_PORT_MODE, SYS_PORT_MODE and
SYS_PAUSE_CFG are declared to be replicated 11 times, the 11th entry in
the array of regfields is not initialized, so the CPU port module is not
initialized either.

The documentation of QSYS_SWITCH_PORT_MODE for VSC7514 also says that
this register group is replicated 12 times, so this patch is simply
reflecting that and not introducing any further inconsistency.

Fixes: 886e1387 ("net: mscc: ocelot: convert QSYS_SWITCH_PORT_MODE and SYS_PORT_MODE to regfields")
Fixes: 541132f0 ("net: mscc: ocelot: convert SYS_PAUSE_CFG register access to regfield")
Reported-by: Bryan Whitehead <bryan.whitehead@microchip.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The buildbot found a config where the header isn't already implicitly
pulled in, so add an explicit include as well.

Fixes: 8c918ffb ("net: remove compat_sock_common_{get,set}sockopt")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alexei Starovoitov says:

====================
pull-request: bpf-next 2020-07-21

The following pull-request contains BPF updates for your *net-next* tree.

We've added 46 non-merge commits during the last 6 day(s) which contain
a total of 68 files changed, 4929 insertions(+), 526 deletions(-).

The main changes are:

1) Run BPF program on socket lookup, from Jakub.

2) Introduce cpumap, from Lorenzo.

3) s390 JIT fixes, from Ilya.

4) teach riscv JIT to emit compressed insns, from Luke.

5) use build time computed BTF ids in bpf iter, from Yonghong.
====================

Purely independent overlapping changes in both filter.h and xdp.h
Signed-off-by: David S. Miller <davem@davemloft.net>

Shannon Nelson says:

====================
ionic updates

These are a few odd code tweaks to the ionic driver: FW defined MTU
limits, remove unnecessary code, and other tidiness tweaks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Add some new interface values and update a few more descriptions.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

We can prevent potential incorrect DMA access attempts from the
NIC by enabling bus-master after the reset, and by disabling
bus-master earlier in cleanup.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix up our comparison to better handle a potential (but largely
unlikely) wrap around.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Clean up some unused code.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

If the host system's udev fails to set a new name for the
network port, there is no NETDEV_CHANGENAME event to trigger
the driver to send the name down to the firmware.  It is safe
to set the lif name multiple times, so we add a call early on
to set the default netdev name to be sure the FW has something
to use in its internal debug logging.  Then when udev gets
around to changing it we can update it to the actual name the
system will be using.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Change from using hardcoded MTU limits and instead use the
firmware defined limits. The value from the LIF attributes is
the frame size, so we take off the header size to convert to
MTU size.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

The commit fe80536a ("bareudp: Added attribute to enable & disable
rx metadata collection") breaks the the original(5.7) default behavior of
bareudp module to collect RX metadadata at the receive. It was added to
avoid the crash at the kernel neighbour subsytem when packet with metadata
from bareudp is processed. But it is no more needed as the
commit 394de110 ("net: Added pointer check for
dst->ops->neigh_lookup in dst_neigh_lookup_skb") solves this crash.

Fixes: fe80536a ("bareudp: Added attribute to enable & disable rx metadata collection")
Signed-off-by: Martin Varghese <martin.varghese@nokia.com>
Acked-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ioana Ciornei says:

====================
dpaa2-eth: add support for TBF offload

This patch set adds support for TBF offload in dpaa2-eth.
The first patch restructures how the .ndo_setup_tc() callback is
implemented (each Qdisc is treated in a separate function), the second
patch just adds the necessary APIs for configuring the Tx shaper and the
last one is handling TC_SETUP_QDISC_TBF and configures as requested the
shaper.
====================
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

React to TC_SETUP_QDISC_TBF and configure the egress shaper as
appropriate with the maximum rate and burst size requested by the user.
TBF can only be offloaded on DPAA2 when it's the root qdisc, ie it's a
per port shaper.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add the necessary API (dpni_set_tx_shaping) for configuring the rate and
burst size of a per port shaper in DPAA2.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move the setup done for MQPRIO into a separate function so that
with the addition of another offload we do not crowd
dpaa2_eth_setup_tc(). After this restructuring it's easier to see what
is supported in terms of Qdisc offloading.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Only used in token.c.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Parav Pandit says:

====================
devlink small improvements

This short series improves the devlink code for lock commment,
simplifying checks and keeping the scope of mutex lock for necessary
fields.

Patch summary:
Patch-1 Keep the devlink_mutex for only for necessary changes.
Patch-2 Avoids duplicate check for reload flag
Patch-3 Adds missing comment for the scope of devlink instance lock
Patch-4 Constify devlink instance pointer
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Constify devlink instance pointer while checking if reload operation is
supported or not.

This helps to review the scope of checks done in reload.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add comment to describe the purpose of devlink instance lock.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>