linux-toradex.git/tools/testing/selftests/drivers/net/Makefile, branch v6.17

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

selftests: drv-net: Test that NAPI ID is non-zero

2025-04-25T01:30:36+00:00

Test that the SO_INCOMING_NAPI_ID of a network file descriptor is
non-zero. This ensures that either the core networking stack or, in some
cases like netdevsim, the driver correctly sets the NAPI ID.

Signed-off-by: Joe Damato 
Link: https://patch.msgid.link/20250424002746.16891-4-jdamato@fastly.com
Signed-off-by: Jakub Kicinski

selftests: drv-net: Test queue xsk attribute

2025-02-18T00:46:03+00:00

Test that queues which are used for AF_XDP have the xsk nest attribute.
The attribute is currently empty, but its existence means the AF_XDP is
being used for the queue. Enable CONFIG_XDP_SOCKETS for
selftests/drivers/net tests, as well.

Signed-off-by: Joe Damato 
Suggested-by: Jakub Kicinski 
Link: https://patch.msgid.link/20250214211255.14194-4-jdamato@fastly.com
Signed-off-by: Jakub Kicinski

netconsole: selftest: test for sysdata CPU

2025-02-10T15:04:18+00:00

Add a new selftest to verify that the netconsole module correctly
handles CPU runtime data in sysdata. The test validates three scenarios:

1. Basic CPU sysdata functionality - verifies that cpu=X is appended to
   messages
2. CPU sysdata with userdata - ensures CPU data works alongside userdata
3. Disabled CPU sysdata - confirms no CPU data is included when disabled

The test uses taskset to control which CPU sends messages and verifies
the reported CPU matches the one used. This helps ensure that netconsole
accurately tracks and reports the originating CPU of messages.

Signed-off-by: Breno Leitao 
Reviewed-by: Simon Horman 
Signed-off-by: David S. Miller

netconsole: selftest: Add test for fragmented messages

2025-02-05T02:09:21+00:00

Add a new selftest to verify netconsole's handling of messages that
exceed the packet size limit and require fragmentation. The test sends
messages with varying sizes and userdata, validating that:

1. Large messages are correctly fragmented and reassembled
2. Userdata fields are properly preserved across fragments
3. Messages work correctly with and without kernel release version
   appending

The test creates a networking environment using netdevsim, sends
messages through /dev/kmsg, and verifies the received fragments maintain
message integrity.

Signed-off-by: Breno Leitao 
Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/20250203-netcons_frag_msgs-v1-1-5bc6bedf2ac0@debian.org
Signed-off-by: Jakub Kicinski