From patchwork Wed Feb 19 12:48:31 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaakko Karrenpalo X-Patchwork-Id: 13982087 X-Patchwork-Delegate: kuba@kernel.org Received: from mail-lf1-f53.google.com (mail-lf1-f53.google.com [209.85.167.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 39F5C1E25EB; Wed, 19 Feb 2025 12:48:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739969329; cv=none; b=aaWOKNTbDH6rFSjxafFvuBhoyaH0KFtP349JLBwnnHrteKIZNk8PVcrEL/NrRSiN303bSSq6yWJqQJE88IjfEe5MmfbvucRHahYtYMnC3gCH0z0uFqKkZDEc6PQRyGJdLeDN6hInSUCzYnwMwJOAqCushzgbG+TS60pypCxqHjY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739969329; c=relaxed/simple; bh=0k00O3dedaXSkq8X71dtr6Gs0IkPdXHgP3eokPEhazU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sTKNbwnObMAb0wXww1IY8KoiXsfvI2SHFjhchHCtrRrhNpzay0KXEAEuKvYKv+yok2i/d5WuFgRASnhHaHESr0vh5jybOcflhoouQ8SJ9rCgacTgydSrNj9tKdg4Ga5dwUNuGJmyvvPG7/0bn88d4Naim/LTj2fTqqaMe6UNceM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Mc7U4Ef+; arc=none smtp.client-ip=209.85.167.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Mc7U4Ef+" Received: by mail-lf1-f53.google.com with SMTP id 2adb3069b0e04-54622940ef7so3368365e87.3; Wed, 19 Feb 2025 04:48:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1739969325; x=1740574125; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UPUJe4F7NO0QNwPr6L/FNnvAtDpJ4vGmW7Xwi/oxtGU=; b=Mc7U4Ef+Tu6kkJyT5moBxXNbHUB5XTx2nyRc72GD0zcTCQ/Irr+qjB1PrUu9xmVQrX Ia+3UepzTk/LxsV5bS8B9je1wGasQs+49CFDQn6SKG4m6R+0e0+Th8RoSTlIUbTeLSTN Ra/NK0p7Ci5mN1mFxytlvBA/gJQTaBGUSYl3lXParA+0/c9Dc5S34UBGlu+6Cq4Q9SPe xQMIQRWsyPJEypdcvHTwpRW1WPQRDp0F/IMvm7aEAIzKPzQXnzBWpCNxnmmmRlDqr8+j UEPHgtIoFZFSk8c56SLWYzXzKvXHhEKrpm/17WCL53RBsQ8pskFOgmy2Y3VHTeRvm1dv PwDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739969325; x=1740574125; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UPUJe4F7NO0QNwPr6L/FNnvAtDpJ4vGmW7Xwi/oxtGU=; b=UkD7RkFaQFoqKXQ6ipOsGWkl3ZhRpIkucHfowJQRk0b6R54gl5Nclh/0kppusd6WaF gBJUOVho7vOYHq17YGdXCYBOsCFLqGs1jkup58WwRVs09edQoj2BgwQqHRsxbz0YPfHW sM4fVLSuNCmUxy1K5jjobzM5+IAYOleVgKTzuhKw/S6p82ryGddPz2ki0M5aTvhHvafN 6WDNn06RGyJSwiNA1jX+0kdnVPyvlKsda7i4FMTJKPoiZzjcYp7UUi7it/23UlROnite QLGrJ5lUzkJaUw1CFsBoDqy+E9EAF7GEQbd1lp9sqPa1Oc0KfjLjVeIGRie/AujKeNu8 AsVA== X-Forwarded-Encrypted: i=1; AJvYcCVVyNU22NrBAa/3q4yWjXAlv0Q3XB2HaC4dRzEyoTczxjsa/uPn9e+YFIZgvzBJ00H4bsJ16ro=@vger.kernel.org X-Gm-Message-State: AOJu0YwpDzPLXAQqbiIdmJVzqu8P3SjVoFZI9sC+BtjP1fqO65xmYHjj acBKyEut+Me7w1IlX1tSpVJxVuBoSC/Z3Ciw203+BGVfNlOziw7o X-Gm-Gg: ASbGncvKRkqOtTd3mUdEh0/OOlbM0KuXS5h61mvPuct1wtx8xpxRsTyxaiqaB6HwkM7 2SrxxYLb2vXU4qtui1PCPYzLsu1d4zFy2gCe31hSxsVNBxXbMc4HKNId+lTAaAj6HcKdf5mJHEu q8QKoHxhKgw8RCT/5pGVezTe0qlrdefCTiQD/SV+TUn3f5mX7YKVF+Tu/fSz8kVuqqVpqLp7wUq WQlnCAHqfM83K7Y9IEbkRVU3n+LM4GzOrA1AoyBY9FG9incqVqwgLnqppXmQF1s5fMvsAvqsVD3 JbvFKlHT3AgxGHVThuxn3vlOENPscAVEPgbzEjmIpTCTsw== X-Google-Smtp-Source: AGHT+IHtr0c6t4RY88x3YXdqbbjC9xNV9Tr8g0PeaxFCG9JzCy606WUl+z3oDN5IGfyHK3EdI+HuzA== X-Received: by 2002:a05:6512:10d6:b0:545:1104:616a with SMTP id 2adb3069b0e04-5462eed85d5mr1225312e87.2.1739969324969; Wed, 19 Feb 2025 04:48:44 -0800 (PST) Received: from FI-L-7486715.nmea.abb.com ([147.161.186.89]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5452c937745sm1732697e87.243.2025.02.19.04.48.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Feb 2025 04:48:44 -0800 (PST) From: Jaakko Karrenpalo X-Google-Original-From: Jaakko Karrenpalo To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jaakko Karrenpalo Subject: [PATCH net-next 2/2] net: hsr: Add KUnit test for PRP Date: Wed, 19 Feb 2025 14:48:31 +0200 Message-ID: <20250219124831.544318-2-jaakko.karrenpalo@fi.abb.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250219124831.544318-1-jaakko.karrenpalo@fi.abb.com> References: <20250219124831.544318-1-jaakko.karrenpalo@fi.abb.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add unit tests for the PRP duplicate detection Signed-off-by: Jaakko Karrenpalo --- net/hsr/Kconfig | 18 +++ net/hsr/Makefile | 2 + net/hsr/prp_dup_discard_test.c | 210 +++++++++++++++++++++++++++++++++ 3 files changed, 230 insertions(+) create mode 100644 net/hsr/prp_dup_discard_test.c diff --git a/net/hsr/Kconfig b/net/hsr/Kconfig index 1b048c17b6c8..fcacdf4f0ffc 100644 --- a/net/hsr/Kconfig +++ b/net/hsr/Kconfig @@ -38,3 +38,21 @@ config HSR relying on this code in a safety critical system! If unsure, say N. + +if HSR + +config PRP_DUP_DISCARD_KUNIT_TEST + tristate "PRP duplicate discard KUnit tests" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + Covers the PRP duplicate discard algorithm. + Only useful for kernel devs running KUnit test harness and are not + for inclusion into a production build. + + For more information on KUnit and unit tests in general please refer + to the KUnit documentation in Documentation/dev-tools/kunit/. + + If unsure, say N. + +endif diff --git a/net/hsr/Makefile b/net/hsr/Makefile index 75df90d3b416..34e581db5c41 100644 --- a/net/hsr/Makefile +++ b/net/hsr/Makefile @@ -8,3 +8,5 @@ obj-$(CONFIG_HSR) += hsr.o hsr-y := hsr_main.o hsr_framereg.o hsr_device.o \ hsr_netlink.o hsr_slave.o hsr_forward.o hsr-$(CONFIG_DEBUG_FS) += hsr_debugfs.o + +obj-$(CONFIG_PRP_DUP_DISCARD_KUNIT_TEST) += prp_dup_discard_test.o diff --git a/net/hsr/prp_dup_discard_test.c b/net/hsr/prp_dup_discard_test.c new file mode 100644 index 000000000000..e212bdf24720 --- /dev/null +++ b/net/hsr/prp_dup_discard_test.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0 +#include + +#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");