netconsole: selftest: Delete all userdata keys

Modify the cleanup function to remove all userdata keys created during the
test, instead of just deleting a single predefined key. This ensures a
more thorough cleanup of temporary resources.

Move the KEY_PATH variable definition inside the set_user_data function
to reduce global variables and improve encapsulation. The KEY_PATH
variable is now dynamically created when setting user data.

This change has no effect on the current test, while improving an
upcoming test that would create several userdata entries.

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]>

Author: leitao

tools/testing/selftests/drivers/net/lib/sh/lib_netcons.sh

@@ -23,7 +23,6 @@ TARGET=$(mktemp -u netcons_XXXXX)
 DEFAULT_PRINTK_VALUES=$(cat /proc/sys/kernel/printk)
 NETCONS_CONFIGFS="/sys/kernel/config/netconsole"
 NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}"
-KEY_PATH="${NETCONS_PATH}/userdata/${USERDATA_KEY}"
 # NAMESPACE will be populated by setup_ns with a random value
 NAMESPACE=""
 
@@ -116,8 +115,8 @@ function cleanup() {
 
 	# delete netconsole dynamic reconfiguration
 	echo 0 > "${NETCONS_PATH}"/enabled
-	# Remove key
-	rmdir "${KEY_PATH}"
+	# Remove all the keys that got created during the selftest
+	find "${NETCONS_PATH}/userdata/" -mindepth 1 -type d -delete
 	# Remove the configfs entry
 	rmdir "${NETCONS_PATH}"
 
@@ -139,6 +138,7 @@ function set_user_data() {
 		exit "${ksft_skip}"
 	fi
 
+	KEY_PATH="${NETCONS_PATH}/userdata/${USERDATA_KEY}"
 	mkdir -p "${KEY_PATH}"
 	VALUE_PATH="${KEY_PATH}""/value"
 	echo "${USERDATA_VALUE}" > "${VALUE_PATH}"