From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- Documentation/dev-tools/kunit/run_wrapper.rst | 323 ++++++++++++++++++++++++++ 1 file changed, 323 insertions(+) create mode 100644 Documentation/dev-tools/kunit/run_wrapper.rst (limited to 'Documentation/dev-tools/kunit/run_wrapper.rst') diff --git a/Documentation/dev-tools/kunit/run_wrapper.rst b/Documentation/dev-tools/kunit/run_wrapper.rst new file mode 100644 index 000000000..dafe8eb28 --- /dev/null +++ b/Documentation/dev-tools/kunit/run_wrapper.rst @@ -0,0 +1,323 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============================= +Running tests with kunit_tool +============================= + +We can either run KUnit tests using kunit_tool or can run tests +manually, and then use kunit_tool to parse the results. To run tests +manually, see: Documentation/dev-tools/kunit/run_manual.rst. +As long as we can build the kernel, we can run KUnit. + +kunit_tool is a Python script which configures and builds a kernel, runs +tests, and formats the test results. + +Run command: + +.. code-block:: + + ./tools/testing/kunit/kunit.py run + +We should see the following: + +.. code-block:: + + Configuring KUnit Kernel ... + Building KUnit kernel... + Starting KUnit kernel... + +We may want to use the following options: + +.. code-block:: + + ./tools/testing/kunit/kunit.py run --timeout=30 --jobs=`nproc --all` + +- ``--timeout`` sets a maximum amount of time for tests to run. +- ``--jobs`` sets the number of threads to build the kernel. + +kunit_tool will generate a ``.kunitconfig`` with a default +configuration, if no other ``.kunitconfig`` file exists +(in the build directory). In addition, it verifies that the +generated ``.config`` file contains the ``CONFIG`` options in the +``.kunitconfig``. +It is also possible to pass a separate ``.kunitconfig`` fragment to +kunit_tool. This is useful if we have several different groups of +tests we want to run independently, or if we want to use pre-defined +test configs for certain subsystems. + +To use a different ``.kunitconfig`` file (such as one +provided to test a particular subsystem), pass it as an option: + +.. code-block:: + + ./tools/testing/kunit/kunit.py run --kunitconfig=fs/ext4/.kunitconfig + +To view kunit_tool flags (optional command-line arguments), run: + +.. code-block:: + + ./tools/testing/kunit/kunit.py run --help + +Creating a ``.kunitconfig`` file +================================ + +If we want to run a specific set of tests (rather than those listed +in the KUnit ``defconfig``), we can provide Kconfig options in the +``.kunitconfig`` file. For default .kunitconfig, see: +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/testing/kunit/configs/default.config. +A ``.kunitconfig`` is a ``minconfig`` (a .config +generated by running ``make savedefconfig``), used for running a +specific set of tests. This file contains the regular Kernel configs +with specific test targets. The ``.kunitconfig`` also +contains any other config options required by the tests (For example: +dependencies for features under tests, configs that enable/disable +certain code blocks, arch configs and so on). + +To create a ``.kunitconfig``, using the KUnit ``defconfig``: + +.. code-block:: + + cd $PATH_TO_LINUX_REPO + cp tools/testing/kunit/configs/default.config .kunit/.kunitconfig + +We can then add any other Kconfig options. For example: + +.. code-block:: + + CONFIG_LIST_KUNIT_TEST=y + +kunit_tool ensures that all config options in ``.kunitconfig`` are +set in the kernel ``.config`` before running the tests. It warns if we +have not included the options dependencies. + +.. note:: Removing something from the ``.kunitconfig`` will + not rebuild the ``.config file``. The configuration is only + updated if the ``.kunitconfig`` is not a subset of ``.config``. + This means that we can use other tools + (For example: ``make menuconfig``) to adjust other config options. + The build dir needs to be set for ``make menuconfig`` to + work, therefore by default use ``make O=.kunit menuconfig``. + +Configuring, building, and running tests +======================================== + +If we want to make manual changes to the KUnit build process, we +can run part of the KUnit build process independently. +When running kunit_tool, from a ``.kunitconfig``, we can generate a +``.config`` by using the ``config`` argument: + +.. code-block:: + + ./tools/testing/kunit/kunit.py config + +To build a KUnit kernel from the current ``.config``, we can use the +``build`` argument: + +.. code-block:: + + ./tools/testing/kunit/kunit.py build + +If we already have built UML kernel with built-in KUnit tests, we +can run the kernel, and display the test results with the ``exec`` +argument: + +.. code-block:: + + ./tools/testing/kunit/kunit.py exec + +The ``run`` command discussed in section: **Running tests with kunit_tool**, +is equivalent to running the above three commands in sequence. + +Parsing test results +==================== + +KUnit tests output displays results in TAP (Test Anything Protocol) +format. When running tests, kunit_tool parses this output and prints +a summary. To see the raw test results in TAP format, we can pass the +``--raw_output`` argument: + +.. code-block:: + + ./tools/testing/kunit/kunit.py run --raw_output + +If we have KUnit results in the raw TAP format, we can parse them and +print the human-readable summary with the ``parse`` command for +kunit_tool. This accepts a filename for an argument, or will read from +standard input. + +.. code-block:: bash + + # Reading from a file + ./tools/testing/kunit/kunit.py parse /var/log/dmesg + # Reading from stdin + dmesg | ./tools/testing/kunit/kunit.py parse + +Filtering tests +=============== + +By passing a bash style glob filter to the ``exec`` or ``run`` +commands, we can run a subset of the tests built into a kernel . For +example: if we only want to run KUnit resource tests, use: + +.. code-block:: + + ./tools/testing/kunit/kunit.py run 'kunit-resource*' + +This uses the standard glob format with wildcard characters. + +.. _kunit-on-qemu: + +Running tests on QEMU +===================== + +kunit_tool supports running tests on qemu as well as +via UML. To run tests on qemu, by default it requires two flags: + +- ``--arch``: Selects a configs collection (Kconfig, qemu config options + and so on), that allow KUnit tests to be run on the specified + architecture in a minimal way. The architecture argument is same as + the option name passed to the ``ARCH`` variable used by Kbuild. + Not all architectures currently support this flag, but we can use + ``--qemu_config`` to handle it. If ``um`` is passed (or this flag + is ignored), the tests will run via UML. Non-UML architectures, + for example: i386, x86_64, arm and so on; run on qemu. + +- ``--cross_compile``: Specifies the Kbuild toolchain. It passes the + same argument as passed to the ``CROSS_COMPILE`` variable used by + Kbuild. As a reminder, this will be the prefix for the toolchain + binaries such as GCC. For example: + + - ``sparc64-linux-gnu`` if we have the sparc toolchain installed on + our system. + + - ``$HOME/toolchains/microblaze/gcc-9.2.0-nolibc/microblaze-linux/bin/microblaze-linux`` + if we have downloaded the microblaze toolchain from the 0-day + website to a directory in our home directory called toolchains. + +This means that for most architectures, running under qemu is as simple as: + +.. code-block:: bash + + ./tools/testing/kunit/kunit.py run --arch=x86_64 + +When cross-compiling, we'll likely need to specify a different toolchain, for +example: + +.. code-block:: bash + + ./tools/testing/kunit/kunit.py run \ + --arch=s390 \ + --cross_compile=s390x-linux-gnu- + +If we want to run KUnit tests on an architecture not supported by +the ``--arch`` flag, or want to run KUnit tests on qemu using a +non-default configuration; then we can write our own``QemuConfig``. +These ``QemuConfigs`` are written in Python. They have an import line +``from..qemu_config import QemuArchParams`` at the top of the file. +The file must contain a variable called ``QEMU_ARCH`` that has an +instance of ``QemuArchParams`` assigned to it. See example in: +``tools/testing/kunit/qemu_configs/x86_64.py``. + +Once we have a ``QemuConfig``, we can pass it into kunit_tool, +using the ``--qemu_config`` flag. When used, this flag replaces the +``--arch`` flag. For example: using +``tools/testing/kunit/qemu_configs/x86_64.py``, the invocation appear +as + +.. code-block:: bash + + ./tools/testing/kunit/kunit.py run \ + --timeout=60 \ + --jobs=12 \ + --qemu_config=./tools/testing/kunit/qemu_configs/x86_64.py + +Running command-line arguments +============================== + +kunit_tool has a number of other command-line arguments which can +be useful for our test environment. Below are the most commonly used +command line arguments: + +- ``--help``: Lists all available options. To list common options, + place ``--help`` before the command. To list options specific to that + command, place ``--help`` after the command. + + .. note:: Different commands (``config``, ``build``, ``run``, etc) + have different supported options. +- ``--build_dir``: Specifies kunit_tool build directory. It includes + the ``.kunitconfig``, ``.config`` files and compiled kernel. + +- ``--make_options``: Specifies additional options to pass to make, when + compiling a kernel (using ``build`` or ``run`` commands). For example: + to enable compiler warnings, we can pass ``--make_options W=1``. + +- ``--alltests``: Enable a predefined set of options in order to build + as many tests as possible. + + .. note:: The list of enabled options can be found in + ``tools/testing/kunit/configs/all_tests.config``. + + If you only want to enable all tests with otherwise satisfied + dependencies, instead add ``CONFIG_KUNIT_ALL_TESTS=y`` to your + ``.kunitconfig``. + +- ``--kunitconfig``: Specifies the path or the directory of the ``.kunitconfig`` + file. For example: + + - ``lib/kunit/.kunitconfig`` can be the path of the file. + + - ``lib/kunit`` can be the directory in which the file is located. + + This file is used to build and run with a predefined set of tests + and their dependencies. For example, to run tests for a given subsystem. + +- ``--kconfig_add``: Specifies additional configuration options to be + appended to the ``.kunitconfig`` file. For example: + + .. code-block:: + + ./tools/testing/kunit/kunit.py run --kconfig_add CONFIG_KASAN=y + +- ``--arch``: Runs tests on the specified architecture. The architecture + argument is same as the Kbuild ARCH environment variable. + For example, i386, x86_64, arm, um, etc. Non-UML architectures run on qemu. + Default is `um`. + +- ``--cross_compile``: Specifies the Kbuild toolchain. It passes the + same argument as passed to the ``CROSS_COMPILE`` variable used by + Kbuild. This will be the prefix for the toolchain + binaries such as GCC. For example: + + - ``sparc64-linux-gnu-`` if we have the sparc toolchain installed on + our system. + + - ``$HOME/toolchains/microblaze/gcc-9.2.0-nolibc/microblaze-linux/bin/microblaze-linux`` + if we have downloaded the microblaze toolchain from the 0-day + website to a specified path in our home directory called toolchains. + +- ``--qemu_config``: Specifies the path to a file containing a + custom qemu architecture definition. This should be a python file + containing a `QemuArchParams` object. + +- ``--qemu_args``: Specifies additional qemu arguments, for example, ``-smp 8``. + +- ``--jobs``: Specifies the number of jobs (commands) to run simultaneously. + By default, this is set to the number of cores on your system. + +- ``--timeout``: Specifies the maximum number of seconds allowed for all tests to run. + This does not include the time taken to build the tests. + +- ``--kernel_args``: Specifies additional kernel command-line arguments. May be repeated. + +- ``--run_isolated``: If set, boots the kernel for each individual suite/test. + This is useful for debugging a non-hermetic test, one that + might pass/fail based on what ran before it. + +- ``--raw_output``: If set, generates unformatted output from kernel. Possible options are: + + - ``all``: To view the full kernel output, use ``--raw_output=all``. + + - ``kunit``: This is the default option and filters to KUnit output. Use ``--raw_output`` or ``--raw_output=kunit``. + +- ``--json``: If set, stores the test results in a JSON format and prints to `stdout` or + saves to a file if a filename is specified. -- cgit v1.2.3