netconsole: selftest: Split the helpers from the selftest

Split helper functions from the netconsole basic test into a separate
library file to enable reuse across different netconsole tests. This
c

netconsole: selftest: Split the helpers from the selftest

Split helper functions from the netconsole basic test into a separate
library file to enable reuse across different netconsole tests. This
change only moves the existing helper functions to lib/sh/lib_netcons.sh
while preserving the same test functionality.

The helpers provide common functions for:
- Setting up network namespaces and interfaces
- Managing netconsole dynamic targets
- Setting user data
- Handling test dependencies
- Cleanup operations

Do not make any change in the code, other than the mechanical
separation.

Signed-off-by: Breno Leitao <[email protected]>
Tested-by: Simon Horman <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: netconsole: selftests: Check if netdevsim is available

The netconsole selftest relies on the availability of the netdevsim module.
To ensure the test can run correctly, we need to check if the

net: netconsole: selftests: Check if netdevsim is available

The netconsole selftest relies on the availability of the netdevsim module.
To ensure the test can run correctly, we need to check if the netdevsim
module is either loaded or built-in before proceeding.

Update the netconsole selftest to check for the existence of
the /sys/bus/netdevsim/new_device file before running the test. If the
file is not found, the test is skipped with an explanation that the
CONFIG_NETDEVSIM kernel config option may not be enabled.

Signed-off-by: Breno Leitao <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: netconsole: selftests: Add userdata validation

Extend netcons_basic selftest to verify the userdata functionality by:
1. Creating a test key in the userdata configfs directory
2. Writing a kn

net: netconsole: selftests: Add userdata validation

Extend netcons_basic selftest to verify the userdata functionality by:
1. Creating a test key in the userdata configfs directory
2. Writing a known value to the key
3. Validating the key-value pair appears in the captured network output

This ensures the userdata feature is properly tested during selftests.

Signed-off-by: Breno Leitao <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: netconsole: selftests: Change the IP subnet

Use a less populated IP range to run the tests, as suggested by Petr in
Link: https://lore.kernel.org/netdev/[email protected]/.

Suggested-b

net: netconsole: selftests: Change the IP subnet

Use a less populated IP range to run the tests, as suggested by Petr in
Link: https://lore.kernel.org/netdev/[email protected]/.

Suggested-by: Petr Machata <[email protected]>
Signed-off-by: Breno Leitao <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...

net: netconsole: selftests: Create a new netconsole selftest

Adds a selftest that creates two virtual interfaces, assigns one to a
new namespace, and assigns IP addresses to both.

It listens on the

net: netconsole: selftests: Create a new netconsole selftest

Adds a selftest that creates two virtual interfaces, assigns one to a
new namespace, and assigns IP addresses to both.

It listens on the destination interface using socat and configures a
dynamic target on netconsole, pointing to the destination IP address.

The test then checks if the message was received properly on the
destination interface.

Signed-off-by: Breno Leitao <[email protected]>
Acked-by: Matthieu Baerts (NGI0) <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

show more ...