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// SPDX-License-Identifier: GPL-2.0
#include <kunit/test.h>
#include "hsr_main.h"
#include "hsr_framereg.h"
struct prp_test_data {
struct hsr_port port;
struct hsr_port port_rcv;
struct hsr_frame_info frame;
struct hsr_node node;
};
static struct prp_test_data *build_prp_test_data(struct kunit *test)
{
struct prp_test_data *data = kunit_kzalloc(test,
sizeof(struct prp_test_data), GFP_USER);
KUNIT_EXPECT_NOT_ERR_OR_NULL(test, data);
data->frame.node_src = &data->node;
data->frame.port_rcv = &data->port_rcv;
data->port_rcv.type = HSR_PT_SLAVE_A;
data->node.seq_start[HSR_PT_SLAVE_A] = 1;
data->node.seq_expected[HSR_PT_SLAVE_A] = 1;
data->node.seq_start[HSR_PT_SLAVE_B] = 1;
data->node.seq_expected[HSR_PT_SLAVE_B] = 1;
data->node.seq_out[HSR_PT_MASTER] = 0;
data->node.time_out[HSR_PT_MASTER] = jiffies;
data->port.type = HSR_PT_MASTER;
return data;
}
static void check_prp_counters(struct kunit *test,
struct prp_test_data *data,
u16 seq_start_a, u16 seq_expected_a,
u16 seq_start_b, u16 seq_expected_b)
{
KUNIT_EXPECT_EQ(test, data->node.seq_start[HSR_PT_SLAVE_A],
seq_start_a);
KUNIT_EXPECT_EQ(test, data->node.seq_start[HSR_PT_SLAVE_B],
seq_start_b);
KUNIT_EXPECT_EQ(test, data->node.seq_expected[HSR_PT_SLAVE_A],
seq_expected_a);
KUNIT_EXPECT_EQ(test, data->node.seq_expected[HSR_PT_SLAVE_B],
seq_expected_b);
}
static void prp_dup_discard_forward(struct kunit *test)
{
/* Normal situation, both LANs in sync. Next frame is forwarded */
struct prp_test_data *data = build_prp_test_data(test);
data->frame.sequence_nr = 2;
KUNIT_EXPECT_EQ(test, 0,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, data->frame.sequence_nr,
data->node.seq_out[HSR_PT_MASTER]);
KUNIT_EXPECT_EQ(test, jiffies, data->node.time_out[HSR_PT_MASTER]);
check_prp_counters(test, data, data->frame.sequence_nr,
data->frame.sequence_nr + 1, 1, 1);
}
static void prp_dup_discard_inside_dropwindow(struct kunit *test)
{
/* Normal situation, other LAN ahead by one. Frame is dropped */
struct prp_test_data *data = build_prp_test_data(test);
unsigned long time = jiffies - 10;
data->frame.sequence_nr = 1;
data->node.seq_expected[HSR_PT_SLAVE_B] = 3;
data->node.seq_out[HSR_PT_MASTER] = 2;
data->node.time_out[HSR_PT_MASTER] = time;
KUNIT_EXPECT_EQ(test, 1,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, 2, data->node.seq_out[HSR_PT_MASTER]);
KUNIT_EXPECT_EQ(test, time, data->node.time_out[HSR_PT_MASTER]);
check_prp_counters(test, data, 2, 2, 2, 3);
}
static void prp_dup_discard_node_timeout(struct kunit *test)
{
/* Timeout situation, node hasn't sent anything for a while */
struct prp_test_data *data = build_prp_test_data(test);
data->frame.sequence_nr = 7;
data->node.seq_start[HSR_PT_SLAVE_A] = 1234;
data->node.seq_expected[HSR_PT_SLAVE_A] = 1235;
data->node.seq_start[HSR_PT_SLAVE_B] = 1234;
data->node.seq_expected[HSR_PT_SLAVE_B] = 1234;
data->node.seq_out[HSR_PT_MASTER] = 1234;
data->node.time_out[HSR_PT_MASTER] =
jiffies - msecs_to_jiffies(HSR_ENTRY_FORGET_TIME) - 1;
KUNIT_EXPECT_EQ(test, 0,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, data->frame.sequence_nr,
data->node.seq_out[HSR_PT_MASTER]);
KUNIT_EXPECT_EQ(test, jiffies, data->node.time_out[HSR_PT_MASTER]);
check_prp_counters(test, data, data->frame.sequence_nr,
data->frame.sequence_nr + 1, 1234, 1234);
}
static void prp_dup_discard_out_of_sequence(struct kunit *test)
{
/* One frame is received out of sequence on both LANs */
struct prp_test_data *data = build_prp_test_data(test);
data->node.seq_start[HSR_PT_SLAVE_A] = 10;
data->node.seq_expected[HSR_PT_SLAVE_A] = 10;
data->node.seq_start[HSR_PT_SLAVE_B] = 10;
data->node.seq_expected[HSR_PT_SLAVE_B] = 10;
data->node.seq_out[HSR_PT_MASTER] = 9;
/* 1st old frame, should be accepted */
data->frame.sequence_nr = 8;
KUNIT_EXPECT_EQ(test, 0,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, data->frame.sequence_nr,
data->node.seq_out[HSR_PT_MASTER]);
check_prp_counters(test, data, data->frame.sequence_nr,
data->frame.sequence_nr + 1, 10, 10);
/* 2nd frame should be dropped */
data->frame.sequence_nr = 8;
data->port_rcv.type = HSR_PT_SLAVE_B;
KUNIT_EXPECT_EQ(test, 1,
prp_register_frame_out(&data->port, &data->frame));
check_prp_counters(test, data, data->frame.sequence_nr + 1,
data->frame.sequence_nr + 1,
data->frame.sequence_nr + 1,
data->frame.sequence_nr + 1);
/* Next frame, this is forwarded */
data->frame.sequence_nr = 10;
data->port_rcv.type = HSR_PT_SLAVE_A;
KUNIT_EXPECT_EQ(test, 0,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, data->frame.sequence_nr,
data->node.seq_out[HSR_PT_MASTER]);
check_prp_counters(test, data, data->frame.sequence_nr,
data->frame.sequence_nr + 1, 9, 9);
/* and next one is dropped */
data->frame.sequence_nr = 10;
data->port_rcv.type = HSR_PT_SLAVE_B;
KUNIT_EXPECT_EQ(test, 1,
prp_register_frame_out(&data->port, &data->frame));
check_prp_counters(test, data, data->frame.sequence_nr + 1,
data->frame.sequence_nr + 1,
data->frame.sequence_nr + 1,
data->frame.sequence_nr + 1);
}
static void prp_dup_discard_lan_b_late(struct kunit *test)
{
/* LAN B is behind */
struct prp_test_data *data = build_prp_test_data(test);
data->node.seq_start[HSR_PT_SLAVE_A] = 9;
data->node.seq_expected[HSR_PT_SLAVE_A] = 9;
data->node.seq_start[HSR_PT_SLAVE_B] = 9;
data->node.seq_expected[HSR_PT_SLAVE_B] = 9;
data->node.seq_out[HSR_PT_MASTER] = 8;
data->frame.sequence_nr = 9;
KUNIT_EXPECT_EQ(test, 0,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, data->frame.sequence_nr,
data->node.seq_out[HSR_PT_MASTER]);
check_prp_counters(test, data, 9, 10, 9, 9);
data->frame.sequence_nr = 10;
KUNIT_EXPECT_EQ(test, 0,
prp_register_frame_out(&data->port, &data->frame));
KUNIT_EXPECT_EQ(test, data->frame.sequence_nr,
data->node.seq_out[HSR_PT_MASTER]);
check_prp_counters(test, data, 9, 11, 9, 9);
data->frame.sequence_nr = 9;
data->port_rcv.type = HSR_PT_SLAVE_B;
KUNIT_EXPECT_EQ(test, 1,
prp_register_frame_out(&data->port, &data->frame));
check_prp_counters(test, data, 10, 11, 10, 10);
data->frame.sequence_nr = 10;
data->port_rcv.type = HSR_PT_SLAVE_B;
KUNIT_EXPECT_EQ(test, 1,
prp_register_frame_out(&data->port, &data->frame));
check_prp_counters(test, data, 11, 11, 11, 11);
}
static struct kunit_case prp_dup_discard_test_cases[] = {
KUNIT_CASE(prp_dup_discard_forward),
KUNIT_CASE(prp_dup_discard_inside_dropwindow),
KUNIT_CASE(prp_dup_discard_node_timeout),
KUNIT_CASE(prp_dup_discard_out_of_sequence),
KUNIT_CASE(prp_dup_discard_lan_b_late),
{}
};
static struct kunit_suite prp_dup_discard_suite = {
.name = "prp_duplicate_discard",
.test_cases = prp_dup_discard_test_cases,
};
kunit_test_suite(prp_dup_discard_suite);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("KUnit tests for PRP duplicate discard");
MODULE_AUTHOR("Jaakko Karrenpalo <jkarrenpalo@gmail.com>");
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