platform/kernel/linux-starfive.git
15 months agotools: ynl: add more info to KeyErrors on missing attrs
Jakub Kicinski [Mon, 14 Aug 2023 20:56:27 +0000 (13:56 -0700)]
tools: ynl: add more info to KeyErrors on missing attrs

When developing specs its useful to know which attr space
YNL was trying to find an attribute in on key error.

Instead of printing:
 KeyError: 0
add info about the space:
 Exception: Space 'vport' has no attribute with value '0'

Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20230814205627.2914583-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonetlink: specs: add ovs_vport new command
Jakub Kicinski [Mon, 14 Aug 2023 20:56:26 +0000 (13:56 -0700)]
netlink: specs: add ovs_vport new command

Add NEW to the spec, it was useful testing the fix for OvS
input validation.

Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20230814205627.2914583-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonet: warn about attempts to register negative ifindex
Jakub Kicinski [Mon, 14 Aug 2023 20:56:25 +0000 (13:56 -0700)]
net: warn about attempts to register negative ifindex

Since the xarray changes we mix returning valid ifindex and negative
errno in a single int returned from dev_index_reserve(). This depends
on the fact that ifindexes can't be negative. Otherwise we may insert
into the xarray and return a very large negative value. This in turn
may break ERR_PTR().

OvS is susceptible to this problem and lacking validation (fix posted
separately for net).

Reject negative ifindex explicitly. Add a warning because the input
validation is better handled by the caller.

Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230814205627.2914583-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoeth: r8152: try to use a normal budget
Jakub Kicinski [Mon, 14 Aug 2023 15:35:21 +0000 (08:35 -0700)]
eth: r8152: try to use a normal budget

Mario reports that loading r8152 on his system leads to a:

  netif_napi_add_weight() called with weight 256

warning getting printed. We don't have any solid data
on why such high budget was chosen, and it may cause
stalls in processing other softirqs and rt threads.
So try to switch back to the default (64) weight.

If this slows down someone's system we should investigate
which part of stopping starting the NAPI poll in this
driver are expensive.

Reported-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/all/0bfd445a-81f7-f702-08b0-bd5a72095e49@amd.com/
Acked-by: Hayes Wang <hayeswang@realtek.com>
Link: https://lore.kernel.org/r/20230814153521.2697982-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonet: e1000e: Remove unused declarations
Yue Haibing [Mon, 14 Aug 2023 13:58:21 +0000 (21:58 +0800)]
net: e1000e: Remove unused declarations

Commit bdfe2da6aefd ("e1000e: cosmetic move of function prototypes to the new mac.h")
declared but never implemented them.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://lore.kernel.org/r/20230814135821.4808-1-yuehaibing@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoqed: remove unused 'resp_size' calculation
Arnd Bergmann [Mon, 14 Aug 2023 07:45:03 +0000 (09:45 +0200)]
qed: remove unused 'resp_size' calculation

Newer versions of clang warn about this variable being assigned but
never used:

drivers/net/ethernet/qlogic/qed/qed_vf.c:63:67: error: parameter 'resp_size' set but not used [-Werror,-Wunused-but-set-parameter]

There is no indication in the git history on how this was ever
meant to be used, so just remove the entire calculation and argument
passing for it to avoid the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230814074512.1067715-1-arnd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonet: phy: mediatek-ge-soc: support PHY LEDs
Daniel Golle [Mon, 14 Aug 2023 01:58:14 +0000 (02:58 +0100)]
net: phy: mediatek-ge-soc: support PHY LEDs

Implement netdev trigger and primitive bliking offloading as well as
simple set_brigthness function for both PHY LEDs of the in-SoC PHYs
found in MT7981 and MT7988.

For MT7988, read boottrap register and apply LED polarities accordingly
to get uniform behavior from all LEDs on MT7988.
This requires syscon phandle 'mediatek,pio' present in parenting MDIO bus
which should point to the syscon holding the boottrap register.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/dc324d48c00cd7350f3a506eaa785324cae97372.1691977904.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoMerge branch 'nexthop-various-cleanups'
Jakub Kicinski [Wed, 16 Aug 2023 01:54:54 +0000 (18:54 -0700)]
Merge branch 'nexthop-various-cleanups'

Ido Schimmel says:

====================
nexthop: Various cleanups

Benefit from recent bug fixes and simplify the nexthop dump code.

No regressions in existing tests:

 # ./fib_nexthops.sh
 [...]
 Tests passed: 234
 Tests failed:   0
====================

Link: https://lore.kernel.org/r/20230813164856.2379822-1-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonexthop: Do not increment dump sentinel at the end of the dump
Ido Schimmel [Sun, 13 Aug 2023 16:48:56 +0000 (19:48 +0300)]
nexthop: Do not increment dump sentinel at the end of the dump

The nexthop and nexthop bucket dump callbacks previously returned a
positive return code even when the dump was complete, prompting the core
netlink code to invoke the callback again, until returning zero.

Zero was only returned by these callbacks when no information was filled
in the provided skb, which was achieved by incrementing the dump
sentinel at the end of the dump beyond the ID of the last nexthop.

This is no longer necessary as when the dump is complete these callbacks
return zero.

Remove the unnecessary increment.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20230813164856.2379822-3-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonexthop: Simplify nexthop bucket dump
Ido Schimmel [Sun, 13 Aug 2023 16:48:55 +0000 (19:48 +0300)]
nexthop: Simplify nexthop bucket dump

Before commit f10d3d9df49d ("nexthop: Make nexthop bucket dump more
efficient"), rtm_dump_nexthop_bucket_nh() returned a non-zero return
code for each resilient nexthop group whose buckets it dumped,
regardless if it encountered an error or not.

This meant that the sentinel ('dd->ctx->nh.idx') used by the function
that walked the different nexthops could not be used as a sentinel for
the bucket dump, as otherwise buckets from the same group would be
dumped over and over again.

This was dealt with by adding another sentinel ('dd->ctx->done_nh_idx')
that was incremented by rtm_dump_nexthop_bucket_nh() after successfully
dumping all the buckets from a given group.

After the previously mentioned commit this sentinel is no longer
necessary since the function no longer returns a non-zero return code
when successfully dumping all the buckets from a given group.

Remove this sentinel and simplify the code.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20230813164856.2379822-2-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoMerge branch 'seg6-add-next-c-sid-support-for-srv6-end-x-behavior'
Jakub Kicinski [Wed, 16 Aug 2023 01:51:49 +0000 (18:51 -0700)]
Merge branch 'seg6-add-next-c-sid-support-for-srv6-end-x-behavior'

Andrea Mayer says:

====================
seg6: add NEXT-C-SID support for SRv6 End.X behavior

In the Segment Routing (SR) architecture a list of instructions, called
segments, can be added to the packet headers to influence the forwarding and
processing of the packets in an SR enabled network.

Considering the Segment Routing over IPv6 data plane (SRv6) [1], the segment
identifiers (SIDs) are IPv6 addresses (128 bits) and the segment list (SID
List) is carried in the Segment Routing Header (SRH). A segment may correspond
to a "behavior" that is executed by a node when the packet is received.
The Linux kernel currently supports a large subset of the behaviors described
in [2] (e.g., End, End.X, End.T and so on).

In some SRv6 scenarios, the number of segments carried by the SID List may
increase dramatically, reducing the MTU (Maximum Transfer Unit) size and/or
limiting the processing power of legacy hardware devices (due to longer IPv6
headers).

The NEXT-C-SID mechanism [3] extends the SRv6 architecture by providing several
ways to efficiently represent the SID List.
By leveraging the NEXT-C-SID, it is possible to encode several SRv6 segments
within a single 128 bit SID address (also referenced as Compressed SID
Container). In this way, the length of the SID List can be drastically reduced.

The NEXT-C-SID mechanism is built upon the "flavors" framework defined in [2].
This framework is already supported by the Linux SRv6 subsystem and is used to
modify and/or extend a subset of existing behaviors.

In this patchset, we extend the SRv6 End.X behavior in order to support the
NEXT-C-SID mechanism.

In details, the patchset is made of:
 - patch 1/2: add NEXT-C-SID support for SRv6 End.X behavior;
 - patch 2/2: add selftest for NEXT-C-SID in SRv6 End.X behavior.

From the user space perspective, we do not need to change the iproute2 code to
support the NEXT-C-SID flavor for the SRv6 End.X behavior. However, we will
update the man page considering the NEXT-C-SID flavor applied to the SRv6 End.X
behavior in a separate patch.

[1] - https://datatracker.ietf.org/doc/html/rfc8754
[2] - https://datatracker.ietf.org/doc/html/rfc8986
[3] - https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-srh-compression
====================

Link: https://lore.kernel.org/r/20230812180926.16689-1-andrea.mayer@uniroma2.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoselftests: seg6: add selftest for NEXT-C-SID flavor in SRv6 End.X behavior
Paolo Lungaroni [Sat, 12 Aug 2023 18:09:26 +0000 (20:09 +0200)]
selftests: seg6: add selftest for NEXT-C-SID flavor in SRv6 End.X behavior

This selftest is designed for testing the support of NEXT-C-SID flavor
for SRv6 End.X behavior. It instantiates a virtual network composed of
several nodes: hosts and SRv6 routers. Each node is realized using a
network namespace that is properly interconnected to others through veth
pairs, according to the topology depicted in the selftest script file.
The test considers SRv6 routers implementing IPv4/IPv6 L3 VPNs leveraged
by hosts for communicating with each other. Such routers i) apply
different SRv6 Policies to the traffic received from connected hosts,
considering the IPv4 or IPv6 protocols; ii) use the NEXT-C-SID
compression mechanism for encoding several SRv6 segments within a single
128-bit SID address, referred to as a Compressed SID (C-SID) container.

The NEXT-C-SID is provided as a "flavor" of the SRv6 End.X behavior,
enabling it to properly process the C-SID containers. The correct
execution of the enabled NEXT-C-SID SRv6 End.X behavior is verified
through reachability tests carried out between hosts belonging to the
same VPN.

Signed-off-by: Paolo Lungaroni <paolo.lungaroni@uniroma2.it>
Co-developed-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20230812180926.16689-3-andrea.mayer@uniroma2.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoseg6: add NEXT-C-SID support for SRv6 End.X behavior
Andrea Mayer [Sat, 12 Aug 2023 18:09:25 +0000 (20:09 +0200)]
seg6: add NEXT-C-SID support for SRv6 End.X behavior

The NEXT-C-SID mechanism described in [1] offers the possibility of
encoding several SRv6 segments within a single 128 bit SID address. Such
a SID address is called a Compressed SID (C-SID) container. In this way,
the length of the SID List can be drastically reduced.

A SID instantiated with the NEXT-C-SID flavor considers an IPv6 address
logically structured in three main blocks: i) Locator-Block; ii)
Locator-Node Function; iii) Argument.

                        C-SID container
+------------------------------------------------------------------+
|     Locator-Block      |Loc-Node|            Argument            |
|                        |Function|                                |
+------------------------------------------------------------------+
<--------- B -----------> <- NF -> <------------- A --------------->

   (i) The Locator-Block can be any IPv6 prefix available to the provider;

  (ii) The Locator-Node Function represents the node and the function to
       be triggered when a packet is received on the node;

 (iii) The Argument carries the remaining C-SIDs in the current C-SID
       container.

This patch leverages the NEXT-C-SID mechanism previously introduced in the
Linux SRv6 subsystem [2] to support SID compression capabilities in the
SRv6 End.X behavior [3].
An SRv6 End.X behavior with NEXT-C-SID flavor works as an End.X behavior
but it is capable of processing the compressed SID List encoded in C-SID
containers.

An SRv6 End.X behavior with NEXT-C-SID flavor can be configured to support
user-provided Locator-Block and Locator-Node Function lengths. In this
implementation, such lengths must be evenly divisible by 8 (i.e. must be
byte-aligned), otherwise the kernel informs the user about invalid
values with a meaningful error code and message through netlink_ext_ack.

If Locator-Block and/or Locator-Node Function lengths are not provided
by the user during configuration of an SRv6 End.X behavior instance with
NEXT-C-SID flavor, the kernel will choose their default values i.e.,
32-bit Locator-Block and 16-bit Locator-Node Function.

[1] - https://datatracker.ietf.org/doc/html/draft-ietf-spring-srv6-srh-compression
[2] - https://lore.kernel.org/all/20220912171619.16943-1-andrea.mayer@uniroma2.it/
[3] - https://datatracker.ietf.org/doc/html/rfc8986#name-endx-l3-cross-connect

Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20230812180926.16689-2-andrea.mayer@uniroma2.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoMerge branch 'genetlink-provide-struct-genl_info-to-dumps'
Jakub Kicinski [Tue, 15 Aug 2023 22:01:03 +0000 (15:01 -0700)]
Merge branch 'genetlink-provide-struct-genl_info-to-dumps'

Jakub Kicinski says:

====================
genetlink: provide struct genl_info to dumps

One of the biggest (which is not to say only) annoyances with genetlink
handling today is that doit and dumpit need some of the same information,
but it is passed to them in completely different structs.

The implementations commonly end up writing a _fill() method which
populates a message and have to pass at least 6 parameters. 3 of which
are extracted manually from request info.

After a lot of umming and ahing I decided to populate struct genl_info
for dumps, without trying to factor out only the common parts.
This makes the adoption easiest.

In the future we may add a new version of dump which takes
struct genl_info *info as the second argument, instead of
struct netlink_callback *cb. For now developers have to call
genl_info_dump(cb) to get the info.

Typical genetlink families no longer get exposed to netlink protocol
internals like pid and seq numbers.

v3:
 - correct the condition in ethtool code (patch 10)
v2: https://lore.kernel.org/all/20230810233845.2318049-1-kuba@kernel.org/
 - replace the GENL_INFO_NTF() macro with init helper
 - fix the commit messages
v1: https://lore.kernel.org/all/20230809182648.1816537-1-kuba@kernel.org/
====================

Link: https://lore.kernel.org/r/20230814214723.2924989-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoethtool: netlink: always pass genl_info to .prepare_data
Jakub Kicinski [Mon, 14 Aug 2023 21:47:23 +0000 (14:47 -0700)]
ethtool: netlink: always pass genl_info to .prepare_data

We had a number of bugs in the past because developers forgot
to fully test dumps, which pass NULL as info to .prepare_data.
.prepare_data implementations would try to access info->extack
leading to a null-deref.

Now that dumps and notifications can access struct genl_info
we can pass it in, and remove the info null checks.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com> # pause
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-11-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoethtool: netlink: simplify arguments to ethnl_default_parse()
Jakub Kicinski [Mon, 14 Aug 2023 21:47:22 +0000 (14:47 -0700)]
ethtool: netlink: simplify arguments to ethnl_default_parse()

Pass struct genl_info directly instead of its members.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-10-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonetdev-genl: use struct genl_info for reply construction
Jakub Kicinski [Mon, 14 Aug 2023 21:47:21 +0000 (14:47 -0700)]
netdev-genl: use struct genl_info for reply construction

Use the just added APIs to make the code simpler.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-9-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: add genlmsg_iput() API
Jakub Kicinski [Mon, 14 Aug 2023 21:47:20 +0000 (14:47 -0700)]
genetlink: add genlmsg_iput() API

Add some APIs and helpers required for convenient construction
of replies and notifications based on struct genl_info.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-8-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: add a family pointer to struct genl_info
Jakub Kicinski [Mon, 14 Aug 2023 21:47:19 +0000 (14:47 -0700)]
genetlink: add a family pointer to struct genl_info

Having family in struct genl_info is quite useful. It cuts
down the number of arguments which need to be passed to
helpers which already take struct genl_info.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-7-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: use attrs from struct genl_info
Jakub Kicinski [Mon, 14 Aug 2023 21:47:18 +0000 (14:47 -0700)]
genetlink: use attrs from struct genl_info

Since dumps carry struct genl_info now, use the attrs pointer
from genl_info and remove the one in struct genl_dumpit_info.

Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: add struct genl_info to struct genl_dumpit_info
Jakub Kicinski [Mon, 14 Aug 2023 21:47:17 +0000 (14:47 -0700)]
genetlink: add struct genl_info to struct genl_dumpit_info

Netlink GET implementations must currently juggle struct genl_info
and struct netlink_callback, depending on whether they were called
from doit or dumpit.

Add genl_info to the dump state and populate the fields.
This way implementations can simply pass struct genl_info around.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-5-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: remove userhdr from struct genl_info
Jakub Kicinski [Mon, 14 Aug 2023 21:47:16 +0000 (14:47 -0700)]
genetlink: remove userhdr from struct genl_info

Only three families use info->userhdr today and going forward
we discourage using fixed headers in new families.
So having the pointer to user header in struct genl_info
is an overkill. Compute the header pointer at runtime.

Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Aaron Conole <aconole@redhat.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: make genl_info->nlhdr const
Jakub Kicinski [Mon, 14 Aug 2023 21:47:15 +0000 (14:47 -0700)]
genetlink: make genl_info->nlhdr const

struct netlink_callback has a const nlh pointer, make the
pointer in struct genl_info const as well, to make copying
between the two easier.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agogenetlink: push conditional locking into dumpit/done
Jakub Kicinski [Mon, 14 Aug 2023 21:47:14 +0000 (14:47 -0700)]
genetlink: push conditional locking into dumpit/done

Add helpers which take/release the genl mutex based
on family->parallel_ops. Remove the separation between
handling of ops in locked and parallel families.

Future patches would make the duplicated code grow even more.

Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230814214723.2924989-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonet: dsa: mv88e6060: add phylink_get_caps implementation
Russell King (Oracle) [Sat, 12 Aug 2023 09:30:33 +0000 (10:30 +0100)]
net: dsa: mv88e6060: add phylink_get_caps implementation

Add a phylink_get_caps implementation for Marvell 88e6060 DSA switch.
This is a fast ethernet switch, with internal PHYs for ports 0 through
4. Port 4 also supports MII, REVMII, REVRMII and SNI. Port 5 supports
MII, REVMII, REVRMII and SNI without an internal PHY.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/E1qUkx7-003dMX-9b@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoMerge branch 'devlink-introduce-selective-dumps'
Jakub Kicinski [Mon, 14 Aug 2023 18:47:27 +0000 (11:47 -0700)]
Merge branch 'devlink-introduce-selective-dumps'

Jiri Pirko says:

====================
devlink: introduce selective dumps

Motivation:

For SFs, one devlink instance per SF is created. There might be
thousands of these on a single host. When a user needs to know port
handle for specific SF, he needs to dump all devlink ports on the host
which does not scale good.

Solution:

Allow user to pass devlink handle (and possibly other attributes)
alongside the dump command and dump only objects which are matching
the selection.

Use split ops to generate policies for dump callbacks acccording to
the attributes used for selection.

The userspace can use ctrl genetlink GET_POLICY command to find out if
the selective dumps are supported by kernel for particular command.

Example:
$ devlink port show
auxiliary/mlx5_core.eth.0/65535: type eth netdev eth2 flavour physical port 0 splittable false
auxiliary/mlx5_core.eth.1/131071: type eth netdev eth3 flavour physical port 1 splittable false

$ devlink port show auxiliary/mlx5_core.eth.0
auxiliary/mlx5_core.eth.0/65535: type eth netdev eth2 flavour physical port 0 splittable false

$ devlink port show auxiliary/mlx5_core.eth.1
auxiliary/mlx5_core.eth.1/131071: type eth netdev eth3 flavour physical port 1 splittable false

Extension:

patches #12 and #13 extends selection attributes by port index
for health reporter dumping.
====================

Link: https://lore.kernel.org/r/20230811155714.1736405-1-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonetlink: specs: devlink: extend health reporter dump attributes by port index
Jiri Pirko [Fri, 11 Aug 2023 15:57:14 +0000 (17:57 +0200)]
netlink: specs: devlink: extend health reporter dump attributes by port index

Allow user to pass port index for health reporter dump request.

Re-generate the related code.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-14-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: extend health reporter dump selector by port index
Jiri Pirko [Fri, 11 Aug 2023 15:57:13 +0000 (17:57 +0200)]
devlink: extend health reporter dump selector by port index

Introduce a possibility for devlink object to expose attributes it
supports for selection of dumped objects.

Use this by health reporter to indicate it supports port index based
selection of dump objects. Implement this selection mechanism in
devlink_nl_cmd_health_reporter_get_dump_one()

Example:
$ devlink health
pci/0000:08:00.0:
  reporter fw
    state healthy error 0 recover 0 auto_dump true
  reporter fw_fatal
    state healthy error 0 recover 0 grace_period 60000 auto_recover true auto_dump true
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.0/32768:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.0/32769:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.0/32770:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.1:
  reporter fw
    state healthy error 0 recover 0 auto_dump true
  reporter fw_fatal
    state healthy error 0 recover 0 grace_period 60000 auto_recover true auto_dump true
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.1/98304:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.1/98305:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.1/98306:
  reporter vnic
    state healthy error 0 recover 0

$ devlink health show pci/0000:08:00.0
pci/0000:08:00.0:
  reporter fw
    state healthy error 0 recover 0 auto_dump true
  reporter fw_fatal
    state healthy error 0 recover 0 grace_period 60000 auto_recover true auto_dump true
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.0/32768:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.0/32769:
  reporter vnic
    state healthy error 0 recover 0
pci/0000:08:00.0/32770:
  reporter vnic
    state healthy error 0 recover 0

$ devlink health show pci/0000:08:00.0/32768
pci/0000:08:00.0/32768:
  reporter vnic
    state healthy error 0 recover 0

The last command is possible because of this patch.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-13-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonetlink: specs: devlink: extend per-instance dump commands to accept instance attributes
Jiri Pirko [Fri, 11 Aug 2023 15:57:12 +0000 (17:57 +0200)]
netlink: specs: devlink: extend per-instance dump commands to accept instance attributes

Extend per-instance dump command definitions to accept instance
attributes. Allow parsing of devlink handle attributes so they could
be used for instance selection.

Re-generate the related code.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-12-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: allow user to narrow per-instance dumps by passing handle attrs
Jiri Pirko [Fri, 11 Aug 2023 15:57:11 +0000 (17:57 +0200)]
devlink: allow user to narrow per-instance dumps by passing handle attrs

For SFs, one devlink instance per SF is created. There might be
thousands of these on a single host. When a user needs to know port
handle for specific SF, he needs to dump all devlink ports on the host
which does not scale good.

Allow user to pass devlink handle attributes alongside the dump command
and dump only objects which are under selected devlink instance.

Example:
$ devlink port show
auxiliary/mlx5_core.eth.0/65535: type eth netdev eth2 flavour physical port 0 splittable false
auxiliary/mlx5_core.eth.1/131071: type eth netdev eth3 flavour physical port 1 splittable false

$ devlink port show auxiliary/mlx5_core.eth.0
auxiliary/mlx5_core.eth.0/65535: type eth netdev eth2 flavour physical port 0 splittable false

$ devlink port show auxiliary/mlx5_core.eth.1
auxiliary/mlx5_core.eth.1/131071: type eth netdev eth3 flavour physical port 1 splittable false

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-11-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: remove converted commands from small ops
Jiri Pirko [Fri, 11 Aug 2023 15:57:10 +0000 (17:57 +0200)]
devlink: remove converted commands from small ops

As the commands are already defined in split ops, remove them
from small ops.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-10-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: remove duplicate temporary netlink callback prototypes
Jiri Pirko [Fri, 11 Aug 2023 15:57:09 +0000 (17:57 +0200)]
devlink: remove duplicate temporary netlink callback prototypes

Remove the duplicate temporary netlink callback prototype as the
generated ones are already in place.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-9-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonetlink: specs: devlink: add commands that do per-instance dump
Jiri Pirko [Fri, 11 Aug 2023 15:57:08 +0000 (17:57 +0200)]
netlink: specs: devlink: add commands that do per-instance dump

Add the definitions for the commands that do per-instance dump
and re-generate the related code.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-8-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: pass flags as an arg of dump_one() callback
Jiri Pirko [Fri, 11 Aug 2023 15:57:07 +0000 (17:57 +0200)]
devlink: pass flags as an arg of dump_one() callback

In order to easily set NLM_F_DUMP_FILTERED for partial dumps, pass the
flags as an arg of dump_one() callback. Currently, it is always
NLM_F_MULTI.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-7-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: introduce dumpit callbacks for split ops
Jiri Pirko [Fri, 11 Aug 2023 15:57:06 +0000 (17:57 +0200)]
devlink: introduce dumpit callbacks for split ops

Introduce dumpit callbacks for generated split ops. Have them
as a thin wrapper around iteration function and allow to pass dump_one()
function pointer directly without need to store in devlink_cmd structs.

Note that the function prototypes are temporary until the generated ones
will replace them in a follow-up patch.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-6-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: rename doit callbacks for per-instance dump commands
Jiri Pirko [Fri, 11 Aug 2023 15:57:05 +0000 (17:57 +0200)]
devlink: rename doit callbacks for per-instance dump commands

Rename netlink doit callback functions for the commands that do
implement per-instance dump to match the generated names that are going
to be introduce in the follow-up patch.

Note that the function prototypes are temporary until the generated ones
will replace them in a follow-up patch.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-5-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: introduce devlink_nl_pre_doit_port*() helper functions
Jiri Pirko [Fri, 11 Aug 2023 15:57:04 +0000 (17:57 +0200)]
devlink: introduce devlink_nl_pre_doit_port*() helper functions

Define port handling helpers what don't rely on internal_flags.
Have __devlink_nl_pre_doit() to accept the flags as a function arg and
make devlink_nl_pre_doit() a wrapper helper function calling it.
Introduce new helpers devlink_nl_pre_doit_port() and
devlink_nl_pre_doit_port_optional() to be used by split ops in follow-up
patch.

Note that the function prototypes are temporary until the generated ones
will replace them in a follow-up patch.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-4-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: parse rate attrs in doit() callbacks
Jiri Pirko [Fri, 11 Aug 2023 15:57:03 +0000 (17:57 +0200)]
devlink: parse rate attrs in doit() callbacks

No need to give the rate any special treatment in netlink attributes
parsing, as unlike for ports, there is only a couple of commands
benefiting from that.

Remove DEVLINK_NL_FLAG_NEED_RATE*, make pre_doit() callback simpler
by moving the rate attributes parsing to rate_*_doit() ops.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-3-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agodevlink: parse linecard attr in doit() callbacks
Jiri Pirko [Fri, 11 Aug 2023 15:57:02 +0000 (17:57 +0200)]
devlink: parse linecard attr in doit() callbacks

No need to give the linecards any special treatment in netlink attribute
parsing, as unlike for ports, there is only a couple of commands
benefiting from that.

Remove DEVLINK_NL_FLAG_NEED_LINECARD, make pre_doit() callback simpler
by moving the linecard attribute parsing to linecard_[gs]et_doit() ops.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20230811155714.1736405-2-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agonet: phy: Introduce PSGMII PHY interface mode
Gabor Juhos [Fri, 11 Aug 2023 11:10:07 +0000 (13:10 +0200)]
net: phy: Introduce PSGMII PHY interface mode

The PSGMII interface is similar to QSGMII. The main difference
is that the PSGMII interface combines five SGMII lines into a
single link while in QSGMII only four lines are combined.

Similarly to the QSGMII, this interface mode might also needs
special handling within the MAC driver.

It is commonly used by Qualcomm with their QCA807x PHY series and
modern WiSoC-s.

Add definitions for the PHY layer to allow to express this type
of connection between the MAC and PHY.

Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agodt-bindings: net: ethernet-controller: add PSGMII mode
Robert Marko [Fri, 11 Aug 2023 11:10:06 +0000 (13:10 +0200)]
dt-bindings: net: ethernet-controller: add PSGMII mode

Add a new PSGMII mode which is similar to QSGMII with the difference being
that it combines 5 SGMII lines into a single link compared to 4 on QSGMII.

It is commonly used by Qualcomm on their QCA807x PHY series.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch 'mlxsw-redirection'
David S. Miller [Mon, 14 Aug 2023 07:11:14 +0000 (08:11 +0100)]
Merge branch 'mlxsw-redirection'

Petr Machata says:

====================
mlxsw: Support traffic redirection from a locked bridge port

Ido Schimmel writes:

It is possible to add a filter that redirects traffic from the ingress
of a bridge port that is locked (i.e., performs security / SMAC lookup)
and has learning enabled. For example:

 # ip link add name br0 type bridge
 # ip link set dev swp1 master br0
 # bridge link set dev swp1 learning on locked on mab on
 # tc qdisc add dev swp1 clsact
 # tc filter add dev swp1 ingress pref 1 proto ip flower skip_sw src_ip 192.0.2.1 action mirred egress redirect dev swp2

In the kernel's Rx path, this filter is evaluated before the Rx handler
of the bridge, which means that redirected traffic should not be
affected by bridge port configuration such as learning.

However, the hardware data path is a bit different and the redirect
action (FORWARDING_ACTION in hardware) merely attaches a pointer to the
packet, which is later used by the L2 lookup stage to understand how to
forward the packet. Between both stages - ingress ACL and L2 lookup -
learning and security lookup are performed, which means that redirected
traffic is affected by bridge port configuration, unlike in the kernel's
data path.

The learning discrepancy was handled in commit 577fa14d2100 ("mlxsw:
spectrum: Do not process learned records with a dummy FID") by simply
ignoring learning notifications generated by the redirected traffic. A
similar solution is not possible for the security / SMAC lookup since
- unlike learning - the CPU is not involved and packets that failed the
lookup are dropped by the device.

Instead, solve this by prepending the ignore action to the redirect
action and use it to instruct the device to disable both learning and
the security / SMAC lookup for redirected traffic.

Patch #1 adds the ignore action.

Patch #2 prepends the action to the redirect action in flower offload
code.

Patch #3 removes the workaround in commit 577fa14d2100 ("mlxsw:
spectrum: Do not process learned records with a dummy FID") since it is
no longer needed.

Patch #4 adds a test case.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoselftests: forwarding: Add test case for traffic redirection from a locked port
Ido Schimmel [Fri, 11 Aug 2023 15:13:58 +0000 (17:13 +0200)]
selftests: forwarding: Add test case for traffic redirection from a locked port

Check that traffic can be redirected from a locked bridge port and that
it does not create locked FDB entries.

Cc: Hans J. Schultz <netdev@kapio-technology.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomlxsw: spectrum: Stop ignoring learning notifications from redirected traffic
Ido Schimmel [Fri, 11 Aug 2023 15:13:57 +0000 (17:13 +0200)]
mlxsw: spectrum: Stop ignoring learning notifications from redirected traffic

As explained in the previous patch, with the ignore action prepended to
the redirect action, it is not longer possible for redirected traffic to
generate learning notifications.

Therefore, remove the workaround that was added in commit 577fa14d2100
("mlxsw: spectrum: Do not process learned records with a dummy FID") as
it is no longer needed.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomlxsw: spectrum_flower: Disable learning and security lookup when redirecting
Ido Schimmel [Fri, 11 Aug 2023 15:13:56 +0000 (17:13 +0200)]
mlxsw: spectrum_flower: Disable learning and security lookup when redirecting

It is possible to add a filter that redirects traffic from the ingress
of a bridge port that is locked (i.e., performs security / SMAC lookup)
and has learning enabled. For example:

 # ip link add name br0 type bridge
 # ip link set dev swp1 master br0
 # bridge link set dev swp1 learning on locked on mab on
 # tc qdisc add dev swp1 clsact
 # tc filter add dev swp1 ingress pref 1 proto ip flower skip_sw src_ip 192.0.2.1 action mirred egress redirect dev swp2

In the kernel's Rx path, this filter is evaluated before the Rx handler
of the bridge, which means that redirected traffic should not be
affected by bridge port configuration such as learning.

However, the hardware data path is a bit different and the redirect
action (FORWARDING_ACTION in hardware) merely attaches a pointer to the
packet, which is later used by the L2 lookup stage to understand how to
forward the packet. Between both stages - ingress ACL and L2 lookup -
learning and security lookup are performed, which means that redirected
traffic is affected by bridge port configuration, unlike in the kernel's
data path.

The learning discrepancy was handled in commit 577fa14d2100 ("mlxsw:
spectrum: Do not process learned records with a dummy FID") by simply
ignoring learning notifications generated by the redirected traffic. A
similar solution is not possible for the security / SMAC lookup since
- unlike learning - the CPU is not involved and packets that failed the
lookup are dropped by the device.

Instead, solve this by prepending the ignore action to the redirect
action and use it to instruct the device to disable both learning and
the security / SMAC lookup for redirected traffic.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomlxsw: core_acl_flex_actions: Add IGNORE_ACTION
Ido Schimmel [Fri, 11 Aug 2023 15:13:55 +0000 (17:13 +0200)]
mlxsw: core_acl_flex_actions: Add IGNORE_ACTION

Add the IGNORE_ACTION which is used to ignore basic switching functions
such as learning on a per-packet basis.

The action will be prepended to the FORWARDING_ACTION in subsequent
patches.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: stmmac: xgmac: show more MAC HW features in debugfs
Furong Xu [Fri, 11 Aug 2023 12:51:39 +0000 (20:51 +0800)]
net: stmmac: xgmac: show more MAC HW features in debugfs

1. Show TSSTSSEL(Timestamp System Time Source),
ADDMACADRSEL(additional MAC addresses), SMASEL(SMA/MDIO Interface),
HDSEL(Half-duplex Support) in debugfs.
2. Show exact number of additional MAC address registers for XGMAC2 core.
3. XGMAC2 core does not have different IP checksum offload types, so just
show rx_coe instead of rx_coe_type1 or rx_coe_type2.
4. XGMAC2 core does not have rxfifo_over_2048 definition, skip it.

Signed-off-by: Furong Xu <0x1207@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch 'net-stats-helpers'
David S. Miller [Mon, 14 Aug 2023 07:06:25 +0000 (08:06 +0100)]
Merge branch 'net-stats-helpers'

Li Zetao says:

====================
Use helper functions to update stats

The patch set uses the helper functions dev_sw_netstats_rx_add() and
dev_sw_netstats_tx_add() to update stats, which is the same as
implementing the function separately.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agovxlan: Use helper functions to update stats
Li Zetao [Thu, 10 Aug 2023 08:56:42 +0000 (16:56 +0800)]
vxlan: Use helper functions to update stats

Use the helper functions dev_sw_netstats_rx_add() and
dev_sw_netstats_tx_add() to update stats, which helps to
provide code readability.

Signed-off-by: Li Zetao <lizetao1@huawei.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: macsec: Use helper functions to update stats
Li Zetao [Thu, 10 Aug 2023 08:56:41 +0000 (16:56 +0800)]
net: macsec: Use helper functions to update stats

Use the helper functions dev_sw_netstats_rx_add() and
dev_sw_netstats_tx_add() to update stats, which helps to
provide code readability.

Signed-off-by: Li Zetao <lizetao1@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agovmxnet3: Add XDP support.
William Tu [Thu, 10 Aug 2023 04:13:04 +0000 (21:13 -0700)]
vmxnet3: Add XDP support.

The patch adds native-mode XDP support: XDP DROP, PASS, TX, and REDIRECT.

Background:
The vmxnet3 rx consists of three rings: ring0, ring1, and dataring.
For r0 and r1, buffers at r0 are allocated using alloc_skb APIs and dma
mapped to the ring's descriptor. If LRO is enabled and packet size larger
than 3K, VMXNET3_MAX_SKB_BUF_SIZE, then r1 is used to mapped the rest of
the buffer larger than VMXNET3_MAX_SKB_BUF_SIZE. Each buffer in r1 is
allocated using alloc_page. So for LRO packets, the payload will be in one
buffer from r0 and multiple from r1, for non-LRO packets, only one
descriptor in r0 is used for packet size less than 3k.

When receiving a packet, the first descriptor will have the sop (start of
packet) bit set, and the last descriptor will have the eop (end of packet)
bit set. Non-LRO packets will have only one descriptor with both sop and
eop set.

Other than r0 and r1, vmxnet3 dataring is specifically designed for
handling packets with small size, usually 128 bytes, defined in
VMXNET3_DEF_RXDATA_DESC_SIZE, by simply copying the packet from the backend
driver in ESXi to the ring's memory region at front-end vmxnet3 driver, in
order to avoid memory mapping/unmapping overhead. In summary, packet size:
    A. < 128B: use dataring
    B. 128B - 3K: use ring0 (VMXNET3_RX_BUF_SKB)
    C. > 3K: use ring0 and ring1 (VMXNET3_RX_BUF_SKB + VMXNET3_RX_BUF_PAGE)
As a result, the patch adds XDP support for packets using dataring
and r0 (case A and B), not the large packet size when LRO is enabled.

XDP Implementation:
When user loads and XDP prog, vmxnet3 driver checks configurations, such
as mtu, lro, and re-allocate the rx buffer size for reserving the extra
headroom, XDP_PACKET_HEADROOM, for XDP frame. The XDP prog will then be
associated with every rx queue of the device. Note that when using dataring
for small packet size, vmxnet3 (front-end driver) doesn't control the
buffer allocation, as a result we allocate a new page and copy packet
from the dataring to XDP frame.

The receive side of XDP is implemented for case A and B, by invoking the
bpf program at vmxnet3_rq_rx_complete and handle its returned action.
The vmxnet3_process_xdp(), vmxnet3_process_xdp_small() function handles
the ring0 and dataring case separately, and decides the next journey of
the packet afterward.

For TX, vmxnet3 has split header design. Outgoing packets are parsed
first and protocol headers (L2/L3/L4) are copied to the backend. The
rest of the payload are dma mapped. Since XDP_TX does not parse the
packet protocol, the entire XDP frame is dma mapped for transmission
and transmitted in a batch. Later on, the frame is freed and recycled
back to the memory pool.

Performance:
Tested using two VMs inside one ESXi vSphere 7.0 machine, using single
core on each vmxnet3 device, sender using DPDK testpmd tx-mode attached
to vmxnet3 device, sending 64B or 512B UDP packet.

VM1 txgen:
$ dpdk-testpmd -l 0-3 -n 1 -- -i --nb-cores=3 \
--forward-mode=txonly --eth-peer=0,<mac addr of vm2>
option: add "--txonly-multi-flow"
option: use --txpkts=512 or 64 byte

VM2 running XDP:
$ ./samples/bpf/xdp_rxq_info -d ens160 -a <options> --skb-mode
$ ./samples/bpf/xdp_rxq_info -d ens160 -a <options>
options: XDP_DROP, XDP_PASS, XDP_TX

To test REDIRECT to cpu 0, use
$ ./samples/bpf/xdp_redirect_cpu -d ens160 -c 0 -e drop

Single core performance comparison with skb-mode.
64B:      skb-mode -> native-mode
XDP_DROP: 1.6Mpps -> 2.4Mpps
XDP_PASS: 338Kpps -> 367Kpps
XDP_TX:   1.1Mpps -> 2.3Mpps
REDIRECT-drop: 1.3Mpps -> 2.3Mpps

512B:     skb-mode -> native-mode
XDP_DROP: 863Kpps -> 1.3Mpps
XDP_PASS: 275Kpps -> 376Kpps
XDP_TX:   554Kpps -> 1.2Mpps
REDIRECT-drop: 659Kpps -> 1.2Mpps

Demo: https://youtu.be/4lm1CSCi78Q

Future work:
- XDP frag support
- use napi_consume_skb() instead of dev_kfree_skb_any at unmap
- stats using u64_stats_t
- using bitfield macro BIT()
- optimization for DMA synchronization using actual frame length,
  instead of always max_len

Signed-off-by: William Tu <u9012063@gmail.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch 'ovs-drop-reasons'
David S. Miller [Mon, 14 Aug 2023 07:01:07 +0000 (08:01 +0100)]
Merge branch 'ovs-drop-reasons'

Adrian Moreno says:

====================
openvswitch: add drop reasons

There is currently a gap in drop visibility in the openvswitch module.
This series tries to improve this by adding a new drop reason subsystem
for OVS.

Apart from adding a new drop reasson subsystem and some common drop
reasons, this series takes Eric's preliminary work [1] on adding an
explicit drop action and integrates it into the same subsystem.

A limitation of this series is that it does not report upcall errors.
The reason is that there could be many sources of upcall drops and the
most common one, which is the netlink buffer overflow, cannot be
reported via kfree_skb() because the skb is freed in the netlink layer
(see [2]). Therefore, using a reason for the rare events and not the
common one would be even more misleading. I'd propose we add (in a
follow up patch) a tracepoint to better report upcall errors.

[1] https://lore.kernel.org/netdev/202306300609.tdRdZscy-lkp@intel.com/T/
[2] commit 1100248a5c5c ("openvswitch: Fix double reporting of drops in dropwatch")

---
v4 -> v5:
- Rebased
- Added a helper function to explicitly convert drop reason enum types

v3 -> v4:
- Changed names of errors following Ilya's suggestions
- Moved the ovs-dpctl.py changes from patch 7/7 to 3/7
- Added a test to ensure actions following a drop are rejected

rfc2 -> v3:
- Rebased on top of latest net-next

rfc1 -> rfc2:
- Fail when an explicit drop is not the last
- Added a drop reason for action errors
- Added braces around macros
- Dropped patch that added support for masks in ovs-dpctl.py as it's now
  included in Aaron's series [2].
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoselftests: openvswitch: add explicit drop testcase
Adrian Moreno [Fri, 11 Aug 2023 14:12:54 +0000 (16:12 +0200)]
selftests: openvswitch: add explicit drop testcase

Test explicit drops generate the right drop reason. Also, verify that
the kernel rejects flows with actions following an explicit drop.

Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoselftests: openvswitch: add drop reason testcase
Adrian Moreno [Fri, 11 Aug 2023 14:12:53 +0000 (16:12 +0200)]
selftests: openvswitch: add drop reason testcase

Test if the correct drop reason is reported when OVS drops a packet due
to an explicit flow.

Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: openvswitch: add misc error drop reasons
Adrian Moreno [Fri, 11 Aug 2023 14:12:52 +0000 (16:12 +0200)]
net: openvswitch: add misc error drop reasons

Use drop reasons from include/net/dropreason-core.h when a reasonable
candidate exists.

Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: openvswitch: add meter drop reason
Adrian Moreno [Fri, 11 Aug 2023 14:12:51 +0000 (16:12 +0200)]
net: openvswitch: add meter drop reason

By using an independent drop reason it makes it easy to distinguish
between QoS-triggered or flow-triggered drop.

Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: openvswitch: add explicit drop action
Eric Garver [Fri, 11 Aug 2023 14:12:50 +0000 (16:12 +0200)]
net: openvswitch: add explicit drop action

From: Eric Garver <eric@garver.life>

This adds an explicit drop action. This is used by OVS to drop packets
for which it cannot determine what to do. An explicit action in the
kernel allows passing the reason _why_ the packet is being dropped or
zero to indicate no particular error happened (i.e: OVS intentionally
dropped the packet).

Since the error codes coming from userspace mean nothing for the kernel,
we squash all of them into only two drop reasons:
- OVS_DROP_EXPLICIT_WITH_ERROR to indicate a non-zero value was passed
- OVS_DROP_EXPLICIT to indicate a zero value was passed (no error)

e.g. trace all OVS dropped skbs

 # perf trace -e skb:kfree_skb --filter="reason >= 0x30000"
 [..]
 106.023 ping/2465 skb:kfree_skb(skbaddr: 0xffffa0e8765f2000, \
  location:0xffffffffc0d9b462, protocol: 2048, reason: 196611)

reason: 196611 --> 0x30003 (OVS_DROP_EXPLICIT)

Also, this patch allows ovs-dpctl.py to add explicit drop actions as:
  "drop"     -> implicit empty-action drop
  "drop(0)"  -> explicit non-error action drop
  "drop(42)" -> explicit error action drop

Signed-off-by: Eric Garver <eric@garver.life>
Co-developed-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: openvswitch: add action error drop reason
Adrian Moreno [Fri, 11 Aug 2023 14:12:49 +0000 (16:12 +0200)]
net: openvswitch: add action error drop reason

Add a drop reason for packets that are dropped because an action
returns a non-zero error code.

Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: openvswitch: add last-action drop reason
Adrian Moreno [Fri, 11 Aug 2023 14:12:48 +0000 (16:12 +0200)]
net: openvswitch: add last-action drop reason

Create a new drop reason subsystem for openvswitch and add the first
drop reason to represent last-action drops.

Last-action drops happen when a flow has an empty action list or there
is no action that consumes the packet (output, userspace, recirc, etc).
It is the most common way in which OVS drops packets.

Implementation-wise, most of these skb-consuming actions already call
"consume_skb" internally and return directly from within the
do_execute_actions() loop so with minimal changes we can assume that
any skb that exits the loop normally is a packet drop.

Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch 'mptcp-remove-msk-subflow'
David S. Miller [Mon, 14 Aug 2023 06:06:14 +0000 (07:06 +0100)]
Merge branch 'mptcp-remove-msk-subflow'

Matthieu Baerts says:

====================
mptcp: get rid of msk->subflow

The MPTCP protocol maintains an additional struct socket per connection,
mainly to be able to easily use tcp-level struct socket operations.

This leads to several side effects, beyond the quite unfortunate /
confusing 'subflow' field name:

- active and passive sockets behaviour is inconsistent: only active ones
  have a not NULL msk->subflow, leading to different error handling and
  different error code returned to the user-space in several places.

- active sockets uses an unneeded, larger amount of memory

- passive sockets can't successfully go through accept(), disconnect(),
  accept() sequence, see [1] for more details.

The 13 first patches of this series are from Paolo and address all the
above, finally getting rid of the blamed field:

- The first patch is a minor clean-up.

- In the next 11 patches, msk->subflow usage is systematically removed
  from the MPTCP protocol, replacing it with direct msk->first usage,
  eventually introducing new core helpers when needed.

- The 13th patch finally disposes the field, and it's the only patch in
  the series intended to produce functional changes.

The last and 14th patch is from Kuniyuki and it is not linked to the
previous ones: it is a small clean-up to get rid of an unnecessary check
in mptcp_init_sock().

[1] https://github.com/multipath-tcp/mptcp_net-next/issues/290
====================

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
15 months agomptcp: Remove unnecessary test for __mptcp_init_sock()
Kuniyuki Iwashima [Fri, 11 Aug 2023 15:57:27 +0000 (17:57 +0200)]
mptcp: Remove unnecessary test for __mptcp_init_sock()

__mptcp_init_sock() always returns 0 because mptcp_init_sock() used
to return the value directly.

But after commit 18b683bff89d ("mptcp: queue data for mptcp level
retransmission"), __mptcp_init_sock() need not return value anymore.

Let's remove the unnecessary test for __mptcp_init_sock() and make
it return void.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: get rid of msk->subflow
Paolo Abeni [Fri, 11 Aug 2023 15:57:26 +0000 (17:57 +0200)]
mptcp: get rid of msk->subflow

Such field is now unused just as a flag to control the first subflow
deletion at close() time. Introduce a new bit flag for that and finally
drop the mentioned field.

As an intended side effect, now the first subflow sock is not freed
before close() even for passive sockets. The msk has no open/active
subflows if the first one is closed and the subflow list is singular,
update accordingly the state check in mptcp_stream_accept().

Among other benefits, the subflow removal, reduces the amount of memory
used on the client side for each mptcp connection, allows passive sockets
to go through successful accept()/disconnect()/connect() and makes return
error code consistent for failing both passive and active sockets.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/290
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: change the mpc check helper to return a sk
Paolo Abeni [Fri, 11 Aug 2023 15:57:25 +0000 (17:57 +0200)]
mptcp: change the mpc check helper to return a sk

After the previous patch the __mptcp_nmpc_socket helper is used
only to ensure that the MPTCP socket is a suitable status - that
is, the mptcp capable handshake is not started yet.

Change the return value to the relevant subflow sock, to finally
remove the last references to first subflow socket in the MPTCP stack.

As a bonus, we can get rid of a few local variables in different
functions.

No functional change intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid ssock usage in mptcp_pm_nl_create_listen_socket()
Paolo Abeni [Fri, 11 Aug 2023 15:57:24 +0000 (17:57 +0200)]
mptcp: avoid ssock usage in mptcp_pm_nl_create_listen_socket()

This is one of the few remaining spots actually manipulating the
first subflow socket. We can leverage the recently introduced
inet helpers to get rid of ssock there.

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid additional indirection in sockopt
Paolo Abeni [Fri, 11 Aug 2023 15:57:23 +0000 (17:57 +0200)]
mptcp: avoid additional indirection in sockopt

The mptcp sockopt infrastructure unneedly uses the first subflow
socket struct in a few spots. We are going to remove such field
soon, so use directly the first subflow sock instead.

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid unneeded indirection in mptcp_stream_accept()
Paolo Abeni [Fri, 11 Aug 2023 15:57:22 +0000 (17:57 +0200)]
mptcp: avoid unneeded indirection in mptcp_stream_accept()

We are going to remove the first subflow socket soon, so avoid
the additional indirection at accept() time. Instead access
directly the first subflow sock, and update mptcp_accept() to
operate on it. This allows dropping a duplicated check in
mptcp_accept().

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid additional indirection in mptcp_poll()
Paolo Abeni [Fri, 11 Aug 2023 15:57:21 +0000 (17:57 +0200)]
mptcp: avoid additional indirection in mptcp_poll()

We are going to remove the first subflow socket soon, so avoid
the additional indirection at poll() time. Instead access
directly the first subflow sock.

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid additional indirection in mptcp_listen()
Paolo Abeni [Fri, 11 Aug 2023 15:57:20 +0000 (17:57 +0200)]
mptcp: avoid additional indirection in mptcp_listen()

We are going to remove the first subflow socket soon, so avoid
the additional indirection via at listen() time. Instead call
directly the recently introduced helper on the first subflow sock.

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: factor out __inet_listen_sk() helper
Paolo Abeni [Fri, 11 Aug 2023 15:57:19 +0000 (17:57 +0200)]
net: factor out __inet_listen_sk() helper

The mptcp protocol maintains an additional socket just to easily
invoke a few stream operations on the first subflow. One of them
is inet_listen().

Factor out an helper operating directly on the (locked) struct sock,
to allow get rid of the above dependency in the next patch without
duplicating the existing code.

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: mptcp: avoid additional indirection in mptcp_bind()
Paolo Abeni [Fri, 11 Aug 2023 15:57:18 +0000 (17:57 +0200)]
mptcp: mptcp: avoid additional indirection in mptcp_bind()

We are going to remove the first subflow socket soon, so avoid
the additional indirection via at bind() time. Instead call directly
the recently introduced helpers on the first subflow sock.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: factor out inet{,6}_bind_sk helpers
Paolo Abeni [Fri, 11 Aug 2023 15:57:17 +0000 (17:57 +0200)]
net: factor out inet{,6}_bind_sk helpers

The mptcp protocol maintains an additional socket just to easily
invoke a few stream operations on the first subflow. One of
them is bind().

Factor out the helpers operating directly on the struct sock, to
allow get rid of the above dependency in the next patch without
duplicating the existing code.

No functional changes intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid subflow socket usage in mptcp_get_port()
Paolo Abeni [Fri, 11 Aug 2023 15:57:16 +0000 (17:57 +0200)]
mptcp: avoid subflow socket usage in mptcp_get_port()

We are going to remove the first subflow socket soon, so avoid
accessing it in mptcp_get_port(). Instead, access directly the
first subflow sock.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid additional __inet_stream_connect() call
Paolo Abeni [Fri, 11 Aug 2023 15:57:15 +0000 (17:57 +0200)]
mptcp: avoid additional __inet_stream_connect() call

The mptcp protocol maintains an additional socket just to easily
invoke a few stream operations on the first subflow. One of them is
__inet_stream_connect().

We are going to remove the first subflow socket soon, so avoid
the additional indirection via at connect time, calling directly
into the sock-level connect() ops.

The sk-level connect never return -EINPROGRESS, cleanup the error
path accordingly. Additionally, the ssk status on error is always
TCP_CLOSE. Avoid unneeded access to the subflow sk state.

No functional change intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agomptcp: avoid unneeded mptcp_token_destroy() calls
Paolo Abeni [Fri, 11 Aug 2023 15:57:14 +0000 (17:57 +0200)]
mptcp: avoid unneeded mptcp_token_destroy() calls

The MPTCP protocol currently clears the msk token both at connect() and
listen() time. That is needed to deal with failing connect() calls that
can create a new token while leaving the sk in TCP_CLOSE,SS_UNCONNECTED
status and thus allowing later connect() and/or listen() calls.

Let's deal with such failures explicitly, cleaning the token in a timely
manner and avoid the confusing early mptcp_token_destroy().

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: Remove leftover include from nftables.h
Jörn-Thorben Hinz [Fri, 11 Aug 2023 17:33:57 +0000 (19:33 +0200)]
net: Remove leftover include from nftables.h

Commit db3685b4046f ("net: remove obsolete members from struct net")
removed the uses of struct list_head from this header, without removing
the corresponding included header.

Signed-off-by: Jörn-Thorben Hinz <jthinz@mailbox.tu-berlin.de>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge tag 'for-net-next-2023-08-11' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Sun, 13 Aug 2023 13:53:53 +0000 (14:53 +0100)]
Merge tag 'for-net-next-2023-08-11' of git://git./linux/kernel/git/bluetooth/bluetooth-next

bluetooth-next pull request for net-next:

 - Add new VID/PID for Mediatek MT7922
 - Add support multiple BIS/BIG
 - Add support for Intel Gale Peak
 - Add support for Qualcomm WCN3988
 - Add support for BT_PKT_STATUS for ISO sockets
 - Various fixes for experimental ISO support
 - Load FW v2 for RTL8852C
 - Add support for NXP AW693 chipset
 - Add support for Mediatek MT2925

15 months agonet: pcs: lynx: fix lynx_pcs_link_up_sgmii() not doing anything in fixed-link mode
Vladimir Oltean [Fri, 11 Aug 2023 11:53:52 +0000 (14:53 +0300)]
net: pcs: lynx: fix lynx_pcs_link_up_sgmii() not doing anything in fixed-link mode

lynx_pcs_link_up_sgmii() is supposed to update the PCS speed and duplex
for the non-inband operating modes, and prior to the blamed commit, it
did just that, but a mistake sneaked into the conversion and reversed
the condition.

It is easy for this to go undetected on platforms that also initialize
the PCS in the bootloader, because Linux doesn't reset it (although
maybe it should). The nature of the bug is that phylink will not touch
the IF_MODE_HALF_DUPLEX | IF_MODE_SPEED_MSK fields when it should, and
it will apparently keep working if the previous values set by the
bootloader were correct.

Fixes: c689a6528c22 ("net: pcs: lynx: update PCS driver to use neg_mode")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch 'net-pci_dev_id'
David S. Miller [Sun, 13 Aug 2023 11:30:40 +0000 (12:30 +0100)]
Merge branch 'net-pci_dev_id'

Zheng Zengkai says:

====================
net: Use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. Use the API to simplify the code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: ngbe: use pci_dev_id() to simplify the code
Zheng Zengkai [Fri, 11 Aug 2023 11:07:02 +0000 (19:07 +0800)]
net: ngbe: use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. We don't need to compose it manually. Use pci_dev_id() to
simplify the code a little bit.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: tc35815: Use pci_dev_id() to simplify the code
Zheng Zengkai [Fri, 11 Aug 2023 11:07:01 +0000 (19:07 +0800)]
net: tc35815: Use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. We don't need to compose it manually. Use pci_dev_id() to
simplify the code a little bit.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: smsc: Use pci_dev_id() to simplify the code
Zheng Zengkai [Fri, 11 Aug 2023 11:07:00 +0000 (19:07 +0800)]
net: smsc: Use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. We don't need to compose it manually. Use pci_dev_id() to
simplify the code a little bit.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agotg3: Use pci_dev_id() to simplify the code
Zheng Zengkai [Fri, 11 Aug 2023 11:06:59 +0000 (19:06 +0800)]
tg3: Use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. We don't need to compose it manually. Use pci_dev_id() to
simplify the code a little bit.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoet131x: Use pci_dev_id() to simplify the code
Zheng Zengkai [Fri, 11 Aug 2023 11:06:58 +0000 (19:06 +0800)]
et131x: Use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. We don't need to compose it manually. Use pci_dev_id() to
simplify the code a little bit.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: e1000: Remove unused declarations
Yue Haibing [Fri, 11 Aug 2023 10:50:05 +0000 (18:50 +0800)]
net: e1000: Remove unused declarations

Commit 675ad47375c7 ("e1000: Use netdev_<level>, pr_<level> and dev_<level>")
declared but never implemented e1000_get_hw_dev_name().
Commit 1532ecea1deb ("e1000: drop dead pcie code from e1000")
removed e1000_check_mng_mode()/e1000_blink_led_start() but not the declarations.
Commit c46b59b241ec ("e1000: Remove unused function e1000_mta_set.")
removed e1000_mta_set() but not its declaration.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet/rds: Remove unused function declarations
Yue Haibing [Fri, 11 Aug 2023 09:50:10 +0000 (17:50 +0800)]
net/rds: Remove unused function declarations

Commit 39de8281791c ("RDS: Main header file") declared but never implemented
rds_trans_init() and rds_trans_exit(), remove it.
Commit d37c9359056f ("RDS: Move loop-only function to loop.c") removed the
implementation rds_message_inc_free() but not the declaration.

Since commit 55b7ed0b582f ("RDS: Common RDMA transport code")
rds_rdma_conn_connect() is never implemented and used.
rds_tcp_map_seq() is never implemented and used since
commit 70041088e3b9 ("RDS: Add TCP transport to RDS").

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonetlink: convert nlk->flags to atomic flags
Eric Dumazet [Fri, 11 Aug 2023 07:22:26 +0000 (07:22 +0000)]
netlink: convert nlk->flags to atomic flags

sk_diag_put_flags(), netlink_setsockopt(), netlink_getsockopt()
and others use nlk->flags without correct locking.

Use set_bit(), clear_bit(), test_bit(), assign_bit() to remove
data-races.

Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch 'tcp-oom-probe'
David S. Miller [Sun, 13 Aug 2023 11:21:38 +0000 (12:21 +0100)]
Merge branch 'tcp-oom-probe'

Menglong Dong says:

====================
net: tcp: support probing OOM

In this series, we make some small changes to make the tcp
retransmission become zero-window probes if the receiver drops the skb
because of memory pressure.

In the 1st patch, we reply a zero-window ACK if the skb is dropped
because out of memory, instead of dropping the skb silently.

In the 2nd patch, we allow a zero-window ACK to update the window.

In the 3rd patch, fix unexcepted socket die when snd_wnd is 0 in
tcp_retransmit_timer().

In the 4th patch, we refactor the debug message in
tcp_retransmit_timer() to make it more correct.

After these changes, the tcp can probe the OOM of the receiver forever.

Changes since v3:
- make the timeout "2 * TCP_RTO_MAX" in the 3rd patch
- tp->retrans_stamp is not based on jiffies and can't be compared with
  icsk->icsk_timeout in the 3rd patch. Fix it.
- introduce the 4th patch

Changes since v2:
- refactor the code to avoid code duplication in the 1st patch
- use after() instead of max() in tcp_rtx_probe0_timed_out()

Changes since v1:
- send 0 rwin ACK for the receive queue empty case when necessary in the
  1st patch
- send the ACK immediately by using the ICSK_ACK_NOW flag in the 1st
  patch
- consider the case of the connection restart from idle, as Neal comment,
  in the 3rd patch
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: tcp: refactor the dbg message in tcp_retransmit_timer()
Menglong Dong [Fri, 11 Aug 2023 02:55:30 +0000 (10:55 +0800)]
net: tcp: refactor the dbg message in tcp_retransmit_timer()

The debug message in tcp_retransmit_timer() is slightly wrong, because
they could be printed even if we did not receive a new ACK packet from
the remote peer.

Change it to probing zero-window, as it is a expected case now. The
description may be not correct.

Adding the duration since the last ACK we received, and the duration of
the retransmission, which are useful for debugging.

And the message now like this:

Probing zero-window on 127.0.0.1:9999/46946, seq=3737778959:3737791503, recv 209ms ago, lasting 209ms
Probing zero-window on 127.0.0.1:9999/46946, seq=3737778959:3737791503, recv 404ms ago, lasting 408ms
Probing zero-window on 127.0.0.1:9999/46946, seq=3737778959:3737791503, recv 812ms ago, lasting 1224ms

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: tcp: fix unexcepted socket die when snd_wnd is 0
Menglong Dong [Fri, 11 Aug 2023 02:55:29 +0000 (10:55 +0800)]
net: tcp: fix unexcepted socket die when snd_wnd is 0

In tcp_retransmit_timer(), a window shrunk connection will be regarded
as timeout if 'tcp_jiffies32 - tp->rcv_tstamp > TCP_RTO_MAX'. This is not
right all the time.

The retransmits will become zero-window probes in tcp_retransmit_timer()
if the 'snd_wnd==0'. Therefore, the icsk->icsk_rto will come up to
TCP_RTO_MAX sooner or later.

However, the timer can be delayed and be triggered after 122877ms, not
TCP_RTO_MAX, as I tested.

Therefore, 'tcp_jiffies32 - tp->rcv_tstamp > TCP_RTO_MAX' is always true
once the RTO come up to TCP_RTO_MAX, and the socket will die.

Fix this by replacing the 'tcp_jiffies32' with '(u32)icsk->icsk_timeout',
which is exact the timestamp of the timeout.

However, "tp->rcv_tstamp" can restart from idle, then tp->rcv_tstamp
could already be a long time (minutes or hours) in the past even on the
first RTO. So we double check the timeout with the duration of the
retransmission.

Meanwhile, making "2 * TCP_RTO_MAX" as the timeout to avoid the socket
dying too soon.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Link: https://lore.kernel.org/netdev/CADxym3YyMiO+zMD4zj03YPM3FBi-1LHi6gSD2XT8pyAMM096pg@mail.gmail.com/
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: tcp: allow zero-window ACK update the window
Menglong Dong [Fri, 11 Aug 2023 02:55:28 +0000 (10:55 +0800)]
net: tcp: allow zero-window ACK update the window

Fow now, an ACK can update the window in following case, according to
the tcp_may_update_window():

1. the ACK acknowledged new data
2. the ACK has new data
3. the ACK expand the window and the seq of it is valid

Now, we allow the ACK update the window if the window is 0, and the
seq/ack of it is valid. This is for the case that the receiver replies
an zero-window ACK when it is under memory stress and can't queue the new
data.

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agonet: tcp: send zero-window ACK when no memory
Menglong Dong [Fri, 11 Aug 2023 02:55:27 +0000 (10:55 +0800)]
net: tcp: send zero-window ACK when no memory

For now, skb will be dropped when no memory, which makes client keep
retrans util timeout and it's not friendly to the users.

In this patch, we reply an ACK with zero-window in this case to update
the snd_wnd of the sender to 0. Therefore, the sender won't timeout the
connection and will probe the zero-window with the retransmits.

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
15 months agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next...
Jakub Kicinski [Sat, 12 Aug 2023 01:24:14 +0000 (18:24 -0700)]
Merge branch '40GbE' of git://git./linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
i40e: Replace one-element arrays with flexible-array members

Replace one-element arrays with flexible-array members in multiple
structures.

This results in no differences in binary output.

* '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
  i40e: Replace one-element array with flex-array member in struct i40e_profile_aq_section
  i40e: Replace one-element array with flex-array member in struct i40e_section_table
  i40e: Replace one-element array with flex-array member in struct i40e_profile_segment
  i40e: Replace one-element array with flex-array member in struct i40e_package_header
====================

Link: https://lore.kernel.org/r/20230810175302.1964182-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoethernet: atarilance: mark init function static
Arnd Bergmann [Thu, 10 Aug 2023 12:25:16 +0000 (14:25 +0200)]
ethernet: atarilance: mark init function static

The init function is only referenced locally, so it should be static to
avoid this warning:

drivers/net/ethernet/amd/atarilance.c:370:28: error: no previous prototype for 'atarilance_probe' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230810122528.1220434-2-arnd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoethernet: ldmvsw: mark ldmvsw_open() static
Arnd Bergmann [Thu, 10 Aug 2023 12:25:15 +0000 (14:25 +0200)]
ethernet: ldmvsw: mark ldmvsw_open() static

The function is exported for no reason and should just be static:

drivers/net/ethernet/sun/ldmvsw.c:127:5: error: no previous prototype for 'ldmvsw_open' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Simon Horman <horms@kernel.org> # build-tested
Link: https://lore.kernel.org/r/20230810122528.1220434-1-arnd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
15 months agoBluetooth: hci_conn: avoid checking uninitialized CIG/CIS ids
Pauli Virtanen [Sat, 5 Aug 2023 16:08:42 +0000 (19:08 +0300)]
Bluetooth: hci_conn: avoid checking uninitialized CIG/CIS ids

The CIS/CIG ids of ISO connections are defined only when the connection
is unicast.

Fix the lookup functions to check for unicast first. Ensure CIG/CIS
IDs have valid value also in state BT_OPEN.

Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: hci_event: drop only unbound CIS if Set CIG Parameters fails
Pauli Virtanen [Sat, 5 Aug 2023 16:08:41 +0000 (19:08 +0300)]
Bluetooth: hci_event: drop only unbound CIS if Set CIG Parameters fails

When user tries to connect a new CIS when its CIG is not configurable,
that connection shall fail, but pre-existing connections shall not be
affected.  However, currently hci_cc_le_set_cig_params deletes all CIS
of the CIG on error so it doesn't work, even though controller shall not
change CIG/CIS configuration if the command fails.

Fix by failing on command error only the connections that are not yet
bound, so that we keep the previous CIS configuration like the
controller does.

Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen <pav@iki.fi>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: btrtl: Load FW v2 otherwise FW v1 for RTL8852C
Max Chou [Mon, 7 Aug 2023 11:42:59 +0000 (19:42 +0800)]
Bluetooth: btrtl: Load FW v2 otherwise FW v1 for RTL8852C

In this commit, prefer to load FW v2 if available. Fallback to FW v1
otherwise. This behavior is only for RTL8852C.

Fixes: 9a24ce5e29b1 ("Bluetooth: btrtl: Firmware format v2 support")
Cc: stable@vger.kernel.org
Suggested-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Tested-by: Hilda Wu <hildawu@realtek.com>
Signed-off-by: Max Chou <max.chou@realtek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: Remove unnecessary NULL check before vfree()
Ziyang Xuan [Mon, 7 Aug 2023 02:32:06 +0000 (10:32 +0800)]
Bluetooth: Remove unnecessary NULL check before vfree()

Remove unnecessary NULL check which causes coccinelle warning:

net/bluetooth/coredump.c:104:2-7: WARNING: NULL check before some
freeing functions is not needed.

Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: hci_sync: Avoid use-after-free in dbg for hci_add_adv_monitor()
Manish Mandlik [Fri, 4 Aug 2023 18:14:45 +0000 (11:14 -0700)]
Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_add_adv_monitor()

KSAN reports use-after-free in hci_add_adv_monitor().

While adding an adv monitor,
    hci_add_adv_monitor() calls ->
    msft_add_monitor_pattern() calls ->
    msft_add_monitor_sync() calls ->
    msft_le_monitor_advertisement_cb() calls in an error case ->
    hci_free_adv_monitor() which frees the *moniter.

This is referenced by bt_dev_dbg() in hci_add_adv_monitor().

Fix the bt_dev_dbg() by using handle instead of monitor->handle.

Fixes: b747a83690c8 ("Bluetooth: hci_sync: Refactor add Adv Monitor")
Signed-off-by: Manish Mandlik <mmandlik@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
15 months agoBluetooth: Fix potential use-after-free when clear keys
Min Li [Mon, 7 Aug 2023 11:07:41 +0000 (19:07 +0800)]
Bluetooth: Fix potential use-after-free when clear keys

Similar to commit c5d2b6fa26b5 ("Bluetooth: Fix use-after-free in
hci_remove_ltk/hci_remove_irk"). We can not access k after kfree_rcu()
call.

Fixes: d7d41682efc2 ("Bluetooth: Fix Suspicious RCU usage warnings")
Signed-off-by: Min Li <lm0963hack@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>