kernel/linux.git/tools/testing/selftests/drivers/net/Makefile, branch v6.18.22

selftest: netcons: create a torture test

2025-11-11T02:34:44+00:00

Create a netconsole test that puts a lot of pressure on the netconsole list manipulation. Do it by creating dynamic targets and deleting targets while messages are being sent. Also put interface down while the messages are being sent, as creating parallel targets. The code launches three background jobs on distinct schedules: * Toggle netcons target every 30 iterations * create and delete random_target every 50 iterations * toggle iface every 70 iterations This creates multiple concurrency sources that interact with netconsole states. This is good practice to simulate stress, and exercise netpoll and netconsole locks. This test already found an issue as reported in [1] Link: https://lore.kernel.org/all/20250901-netpoll_memleak-v1-1-34a181977dfc@debian.org/ [1] Signed-off-by: Breno Leitao Reviewed-by: Andre Carvalho Reviewed-by: Simon Horman Link: https://patch.msgid.link/20251107-netconsole_torture-v10-3-749227b55f63@debian.org Signed-off-by: Jakub Kicinski

selftests: net: unify the Makefile formats

2025-10-06T20:14:06+00:00

We get a significant number of conflicts between net and net-next because of selftests Makefile changes. People tend to append new test cases at the end of the Makefile when there's no clear sort order. Sort all networking selftests Makefiles, use the following format: VAR_NAME := \ entry1 \ entry2 \ entry3 \ # end of VAR_NAME Some Makefiles are already pretty close to this. Acked-by: Antonio Quartulli Acked-by: Matthieu Baerts (NGI0) Acked-by: Allison Henderson Reviewed-by: Petr Machata Link: https://patch.msgid.link/20251003210127.1021918-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: drv-net: add PSP responder

2025-09-30T13:17:22+00:00

PSP tests need the remote system to support PSP, and some PSP capable application to exchange data with. Create a simple PSP responder app which we can build and deploy to the remote host. The tests themselves can be written in Python but for ease of deploying the responder is in C (using C YNL). Signed-off-by: Jakub Kicinski Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250927225420.1443468-4-kuba@kernel.org Reviewed-by: Willem de Bruijn Signed-off-by: Paolo Abeni

selftests: drv-net: base device access API test

2025-09-30T13:17:21+00:00

Simple PSP test to getting info about PSP devices. Signed-off-by: Jakub Kicinski Signed-off-by: Daniel Zahka Link: https://patch.msgid.link/20250927225420.1443468-3-kuba@kernel.org Reviewed-by: Willem de Bruijn Signed-off-by: Paolo Abeni

net: Update threaded state in napi config in netif_set_threaded

2025-08-06T00:46:15+00:00

Commit 2677010e7793 ("Add support to set NAPI threaded for individual NAPI") added support to enable/disable threaded napi using netlink. This also extended the napi config save/restore functionality to set the napi threaded state. This breaks netdev reset for drivers that use napi threaded at device level and also use napi config save/restore on napi_disable/napi_enable. Basically on netdev with napi threaded enabled at device level, a napi_enable call will get stuck trying to stop the napi kthread. This is because the napi->config->threaded is set to disabled when threaded is enabled at device level. The issue can be reproduced on virtio-net device using qemu. To reproduce the issue run following, echo 1 > /sys/class/net/threaded ethtool -L eth0 combined 1 Update the threaded state in napi config in netif_set_threaded and add a new test that verifies this scenario. Tested on qemu with virtio-net: NETIF=eth0 ./tools/testing/selftests/drivers/net/napi_threaded.py TAP version 13 1..2 ok 1 napi_threaded.change_num_queues ok 2 napi_threaded.enable_dev_threaded_disable_napi_threaded # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0 Fixes: 2677010e7793 ("Add support to set NAPI threaded for individual NAPI") Signed-off-by: Samiullah Khawaja Link: https://patch.msgid.link/20250804164457.2494390-1-skhawaja@google.com Signed-off-by: Jakub Kicinski

selftests: drv-net: Test XDP_PASS/DROP support

2025-07-23T01:15:53+00:00

Test XDP_PASS/DROP in single buffer and multi buffer mode when XDP native support is available. ./drivers/net/xdp.py TAP version 13 1..4 ok 1 xdp.test_xdp_native_pass_sb ok 2 xdp.test_xdp_native_pass_mb ok 3 xdp.test_xdp_native_drop_sb ok 4 xdp.test_xdp_native_drop_mb \# Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Mohsin Bashir Link: https://patch.msgid.link/20250719083059.3209169-3-mohsin.bashr@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: add netpoll basic functionality test

2025-07-17T00:25:49+00:00

Add a basic selftest for the netpoll polling mechanism, specifically targeting the netpoll poll() side. The test creates a scenario where network transmission is running at maximum speed, and netpoll needs to poll the NIC. This is achieved by: 1. Configuring a single RX/TX queue to create contention 2. Generating background traffic to saturate the interface 3. Sending netconsole messages to trigger netpoll polling 4. Using dynamic netconsole targets via configfs 5. Delete and create new netconsole targets after some messages 6. Start a bpftrace in parallel to make sure netpoll_poll_dev() is called 7. If bpftrace exists and netpoll_poll_dev() was called, stop. The test validates a critical netpoll code path by monitoring traffic flow and ensuring netpoll_poll_dev() is called when the normal TX path is blocked. This addresses a gap in netpoll test coverage for a path that is tricky for the network stack. Signed-off-by: Breno Leitao Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20250714-netpoll_test-v7-3-c0220cfaa63e@debian.org Signed-off-by: Jakub Kicinski

selftests: net: add netconsole test for cmdline configuration

2025-06-16T22:18:34+00:00

Add a new selftest to verify netconsole module loading with command line arguments. This test exercises the init_netconsole() path and validates proper parsing of the netconsole= parameter format. The test: - Loads netconsole module with cmdline configuration instead of dynamic reconfiguration - Validates message transmission through the configured target - Adds helper functions for cmdline string generation and module validation This complements existing netconsole selftests by covering the module initialization code path that processes boot-time parameters. This test is useful to test issues like the one described in [1]. Link: https://lore.kernel.org/netdev/Z36TlACdNMwFD7wv@dev-ushankar.dev.purestorage.com/ [1] Signed-off-by: Breno Leitao Link: https://patch.msgid.link/20250613-rework-v3-8-0752bf2e6912@debian.org Signed-off-by: Jakub Kicinski

selftests: net: move wait_local_port_listen to lib.sh

2025-05-28T00:31:42+00:00

The function wait_local_port_listen() is the only function defined in net_helper.sh. Since some tests source both lib.sh and net_helper.sh, we can simplify the setup by moving wait_local_port_listen() to lib.sh. With this change, net_helper.sh becomes redundant and can be removed. Signed-off-by: Hangbin Liu Reviewed-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20250526014600.9128-1-liuhangbin@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: move xdp_helper to net/lib

2025-04-28T22:49:10+00:00

Move xdp_helper to net/lib to make it easier for other selftests to use the helper. Signed-off-by: Bui Quang Minh Acked-by: Michael S. Tsirkin Link: https://patch.msgid.link/20250425071018.36078-2-minhquangbui99@gmail.com Signed-off-by: Jakub Kicinski