From patchwork Wed Oct 30 08:06:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gow X-Patchwork-Id: 11219141 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E496C139A for ; Wed, 30 Oct 2019 08:06:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A4DF62173E for ; Wed, 30 Oct 2019 08:06:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="LcrTjOAz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725923AbfJ3IG3 (ORCPT ); Wed, 30 Oct 2019 04:06:29 -0400 Received: from mail-vk1-f201.google.com ([209.85.221.201]:36593 "EHLO mail-vk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726336AbfJ3IG3 (ORCPT ); Wed, 30 Oct 2019 04:06:29 -0400 Received: by mail-vk1-f201.google.com with SMTP id z23so641853vkb.3 for ; Wed, 30 Oct 2019 01:06:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=nrVFeA7mCQSZGTfIu/4seQ6nZoMggtspSnJ4kYq+gSs=; b=LcrTjOAz1K6rz+qiO9yqbFuDYAgRKmnT8/hy8bnMPkb3sX+ulx74TnrAF9AsD3GXcV HCqYahtil7xvdxVrLqbJFeqeaz4fjliCmGKByIzNTUFoqTgUk7FJQiu54peW2gT2vdUK +dxdFEGA6zo/H2Lw53bXJepVsVxSMF7iekt1iyGq3n+H19Zo2FT1RSJjjB5M4fRGOeOj GjXdhLZLn17ZmKFVNrbAjcYzQsag3cJPBby82AR9HGPqb8VT4czZJFhkZRAshSq7kpoY BJXOgwLhRN+BQYryISjAPIglDCJujvU2Ut3bVHWQvw355NGiEyULRaIccYrChrns0y81 TFoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=nrVFeA7mCQSZGTfIu/4seQ6nZoMggtspSnJ4kYq+gSs=; b=T/4uaUBtBL7lzRLXtALQLWXvV1c4nPeQUj/xCorZRb4t55A0VFtxcCihG/7HK9jdyV s9VXbHUdrnlJNNkx8MEw1iqs3zDb3rVXE1esXpz1Fi1YNyjTbMiVvH6l/x+/cm76WJP4 A1LmGHILsVYFrIspw6qEI9HaN71dWjdb3vEcZlDeVmqEdhJh8oTrbg0PRzqEAi3kDUKK 9lLoAh7ZMgjVqKXI9QDMZhkZu4koBemGwhuqS1jaw/OFqVUxHzBOqPfOwO/GDXLs/Lb9 PP0+RUpER2fLYGpXZBdGFRbxwnMKc/1s5ATYGeN0cJw9uKbXyiDFZsNPzclNfEqsLt58 ksJg== X-Gm-Message-State: APjAAAXSczKpHn17yCOnTQZWvWUoEOLYssPbucNngOrMNoKWSB944Y0J U833dnczrUrSy3H5TRHINlWrcjwjeNAcYw== X-Google-Smtp-Source: APXvYqyW89HEoV5ULyqFVOBx+EQVmrEAZL6Mi1EouoSw+3bL4PU+AR49Mfy/5npqiIFwiMnUMXnj+er7Ygjc1A== X-Received: by 2002:a1f:d7c1:: with SMTP id o184mr10346179vkg.19.1572422786920; Wed, 30 Oct 2019 01:06:26 -0700 (PDT) Date: Wed, 30 Oct 2019 01:06:22 -0700 Message-Id: <20191030080622.111697-1-davidgow@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.24.0.rc0.303.g954a862665-goog Subject: [PATCH linux-kselftest/test v7] lib/list-test: add a test for the 'list' doubly linked list From: David Gow To: shuah@kernel.org, brendanhiggins@google.com, akpm@linux-foundation.org, keescook@chromium.org Cc: linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, dan.carpenter@oracle.com, David Gow Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add a KUnit test for the kernel doubly linked list implementation in include/linux/list.h Each test case (list_test_x) is focused on testing the behaviour of the list function/macro 'x'. None of the tests pass invalid lists to these macros, and so should behave identically with DEBUG_LIST enabled and disabled. Note that, at present, it only tests the list_ types (not the singly-linked hlist_), and does not yet test all of the list_for_each_entry* macros (and some related things like list_prepare_entry). Signed-off-by: David Gow Reviewed-by: Brendan Higgins Tested-by: Brendan Higgins --- This revision, v7, renames tests with 'for_each' in their name to have 'for__each' instead. This works around the checkpatch.pl bug Shuah mentioned, as checkpatch.pl believes that function definitions with 'for_each' in the name are actually loops, and wants the '{' on the previous line. With this change, checkpatch is perfectly happy. Earlier versions of this patchset can be found: v6: https://lore.kernel.org/linux-kselftest/20191024224631.118656-1-davidgow@google.com/ v5: https://lore.kernel.org/linux-kselftest/20191022221322.122788-1-davidgow@google.com/ v4: https://lore.kernel.org/linux-kselftest/20191018215549.65000-1-davidgow@google.com/ v3: https://lore.kernel.org/linux-kselftest/20191016215707.95317-1-davidgow@google.com/ v2: https://lore.kernel.org/linux-kselftest/20191010185631.26541-1-davidgow@google.com/ v1: https://lore.kernel.org/linux-kselftest/20191007213633.92565-1-davidgow@google.com/ Thanks, -- David MAINTAINERS | 7 + lib/Kconfig.debug | 18 ++ lib/Makefile | 3 + lib/list-test.c | 746 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 774 insertions(+) create mode 100644 lib/list-test.c diff --git a/MAINTAINERS b/MAINTAINERS index 7ef985e01457..f3d0c6e42b97 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9504,6 +9504,13 @@ F: Documentation/misc-devices/lis3lv02d.rst F: drivers/misc/lis3lv02d/ F: drivers/platform/x86/hp_accel.c +LIST KUNIT TEST +M: David Gow +L: linux-kselftest@vger.kernel.org +L: kunit-dev@googlegroups.com +S: Maintained +F: lib/list-test.c + LIVE PATCHING M: Josh Poimboeuf M: Jiri Kosina diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index a3017a5dadcd..6c1be6181e38 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1961,6 +1961,24 @@ config SYSCTL_KUNIT_TEST If unsure, say N. +config LIST_KUNIT_TEST + bool "KUnit Test for Kernel Linked-list structures" + depends on KUNIT + help + This builds the linked list KUnit test suite. + It tests that the API and basic functionality of the list_head type + and associated macros. + + KUnit tests run during boot and output the results to the debug log + in TAP format (http://testanything.org/). Only useful for kernel devs + running the KUnit test harness, and not intended 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. + config TEST_UDELAY tristate "udelay test driver" help diff --git a/lib/Makefile b/lib/Makefile index bba1fd5485f7..890e581d00c4 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -292,3 +292,6 @@ obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o obj-$(CONFIG_OBJAGG) += objagg.o + +# KUnit tests +obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o diff --git a/lib/list-test.c b/lib/list-test.c new file mode 100644 index 000000000000..9edb5d8de536 --- /dev/null +++ b/lib/list-test.c @@ -0,0 +1,746 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for the Kernel Linked-list structures. + * + * Copyright (C) 2019, Google LLC. + * Author: David Gow + */ +#include + +#include + +struct list_test_struct { + int data; + struct list_head list; +}; + +static void list_test_list_init(struct kunit *test) +{ + /* Test the different ways of initialising a list. */ + struct list_head list1 = LIST_HEAD_INIT(list1); + struct list_head list2; + LIST_HEAD(list3); + struct list_head *list4; + struct list_head *list5; + + INIT_LIST_HEAD(&list2); + + list4 = kzalloc(sizeof(*list4), GFP_KERNEL | __GFP_NOFAIL); + INIT_LIST_HEAD(list4); + + list5 = kmalloc(sizeof(*list5), GFP_KERNEL | __GFP_NOFAIL); + memset(list5, 0xFF, sizeof(*list5)); + INIT_LIST_HEAD(list5); + + /* list_empty_careful() checks both next and prev. */ + KUNIT_EXPECT_TRUE(test, list_empty_careful(&list1)); + KUNIT_EXPECT_TRUE(test, list_empty_careful(&list2)); + KUNIT_EXPECT_TRUE(test, list_empty_careful(&list3)); + KUNIT_EXPECT_TRUE(test, list_empty_careful(list4)); + KUNIT_EXPECT_TRUE(test, list_empty_careful(list5)); + + kfree(list4); + kfree(list5); +} + +static void list_test_list_add(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add(&a, &list); + list_add(&b, &list); + + /* should be [list] -> b -> a */ + KUNIT_EXPECT_PTR_EQ(test, list.next, &b); + KUNIT_EXPECT_PTR_EQ(test, b.prev, &list); + KUNIT_EXPECT_PTR_EQ(test, b.next, &a); +} + +static void list_test_list_add_tail(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + /* should be [list] -> a -> b */ + KUNIT_EXPECT_PTR_EQ(test, list.next, &a); + KUNIT_EXPECT_PTR_EQ(test, a.prev, &list); + KUNIT_EXPECT_PTR_EQ(test, a.next, &b); +} + +static void list_test_list_del(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + /* before: [list] -> a -> b */ + list_del(&a); + + /* now: [list] -> b */ + KUNIT_EXPECT_PTR_EQ(test, list.next, &b); + KUNIT_EXPECT_PTR_EQ(test, b.prev, &list); +} + +static void list_test_list_replace(struct kunit *test) +{ + struct list_head a_old, a_new, b; + LIST_HEAD(list); + + list_add_tail(&a_old, &list); + list_add_tail(&b, &list); + + /* before: [list] -> a_old -> b */ + list_replace(&a_old, &a_new); + + /* now: [list] -> a_new -> b */ + KUNIT_EXPECT_PTR_EQ(test, list.next, &a_new); + KUNIT_EXPECT_PTR_EQ(test, b.prev, &a_new); +} + +static void list_test_list_replace_init(struct kunit *test) +{ + struct list_head a_old, a_new, b; + LIST_HEAD(list); + + list_add_tail(&a_old, &list); + list_add_tail(&b, &list); + + /* before: [list] -> a_old -> b */ + list_replace_init(&a_old, &a_new); + + /* now: [list] -> a_new -> b */ + KUNIT_EXPECT_PTR_EQ(test, list.next, &a_new); + KUNIT_EXPECT_PTR_EQ(test, b.prev, &a_new); + + /* check a_old is empty (initialized) */ + KUNIT_EXPECT_TRUE(test, list_empty_careful(&a_old)); +} + +static void list_test_list_swap(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + /* before: [list] -> a -> b */ + list_swap(&a, &b); + + /* after: [list] -> b -> a */ + KUNIT_EXPECT_PTR_EQ(test, &b, list.next); + KUNIT_EXPECT_PTR_EQ(test, &a, list.prev); + + KUNIT_EXPECT_PTR_EQ(test, &a, b.next); + KUNIT_EXPECT_PTR_EQ(test, &list, b.prev); + + KUNIT_EXPECT_PTR_EQ(test, &list, a.next); + KUNIT_EXPECT_PTR_EQ(test, &b, a.prev); +} + +static void list_test_list_del_init(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + /* before: [list] -> a -> b */ + list_del_init(&a); + /* after: [list] -> b, a initialised */ + + KUNIT_EXPECT_PTR_EQ(test, list.next, &b); + KUNIT_EXPECT_PTR_EQ(test, b.prev, &list); + KUNIT_EXPECT_TRUE(test, list_empty_careful(&a)); +} + +static void list_test_list_move(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list1); + LIST_HEAD(list2); + + list_add_tail(&a, &list1); + list_add_tail(&b, &list2); + + /* before: [list1] -> a, [list2] -> b */ + list_move(&a, &list2); + /* after: [list1] empty, [list2] -> a -> b */ + + KUNIT_EXPECT_TRUE(test, list_empty(&list1)); + + KUNIT_EXPECT_PTR_EQ(test, &a, list2.next); + KUNIT_EXPECT_PTR_EQ(test, &b, a.next); +} + +static void list_test_list_move_tail(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list1); + LIST_HEAD(list2); + + list_add_tail(&a, &list1); + list_add_tail(&b, &list2); + + /* before: [list1] -> a, [list2] -> b */ + list_move_tail(&a, &list2); + /* after: [list1] empty, [list2] -> b -> a */ + + KUNIT_EXPECT_TRUE(test, list_empty(&list1)); + + KUNIT_EXPECT_PTR_EQ(test, &b, list2.next); + KUNIT_EXPECT_PTR_EQ(test, &a, b.next); +} + +static void list_test_list_bulk_move_tail(struct kunit *test) +{ + struct list_head a, b, c, d, x, y; + struct list_head *list1_values[] = { &x, &b, &c, &y }; + struct list_head *list2_values[] = { &a, &d }; + struct list_head *ptr; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&x, &list1); + list_add_tail(&y, &list1); + + list_add_tail(&a, &list2); + list_add_tail(&b, &list2); + list_add_tail(&c, &list2); + list_add_tail(&d, &list2); + + /* before: [list1] -> x -> y, [list2] -> a -> b -> c -> d */ + list_bulk_move_tail(&y, &b, &c); + /* after: [list1] -> x -> b -> c -> y, [list2] -> a -> d */ + + list_for_each(ptr, &list1) { + KUNIT_EXPECT_PTR_EQ(test, ptr, list1_values[i]); + i++; + } + KUNIT_EXPECT_EQ(test, i, 4); + i = 0; + list_for_each(ptr, &list2) { + KUNIT_EXPECT_PTR_EQ(test, ptr, list2_values[i]); + i++; + } + KUNIT_EXPECT_EQ(test, i, 2); +} + +static void list_test_list_is_first(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + KUNIT_EXPECT_TRUE(test, list_is_first(&a, &list)); + KUNIT_EXPECT_FALSE(test, list_is_first(&b, &list)); +} + +static void list_test_list_is_last(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + KUNIT_EXPECT_FALSE(test, list_is_last(&a, &list)); + KUNIT_EXPECT_TRUE(test, list_is_last(&b, &list)); +} + +static void list_test_list_empty(struct kunit *test) +{ + struct list_head a; + LIST_HEAD(list1); + LIST_HEAD(list2); + + list_add_tail(&a, &list1); + + KUNIT_EXPECT_FALSE(test, list_empty(&list1)); + KUNIT_EXPECT_TRUE(test, list_empty(&list2)); +} + +static void list_test_list_empty_careful(struct kunit *test) +{ + /* This test doesn't check correctness under concurrent access */ + struct list_head a; + LIST_HEAD(list1); + LIST_HEAD(list2); + + list_add_tail(&a, &list1); + + KUNIT_EXPECT_FALSE(test, list_empty_careful(&list1)); + KUNIT_EXPECT_TRUE(test, list_empty_careful(&list2)); +} + +static void list_test_list_rotate_left(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + + /* before: [list] -> a -> b */ + list_rotate_left(&list); + /* after: [list] -> b -> a */ + + KUNIT_EXPECT_PTR_EQ(test, list.next, &b); + KUNIT_EXPECT_PTR_EQ(test, b.prev, &list); + KUNIT_EXPECT_PTR_EQ(test, b.next, &a); +} + +static void list_test_list_rotate_to_front(struct kunit *test) +{ + struct list_head a, b, c, d; + struct list_head *list_values[] = { &c, &d, &a, &b }; + struct list_head *ptr; + LIST_HEAD(list); + int i = 0; + + list_add_tail(&a, &list); + list_add_tail(&b, &list); + list_add_tail(&c, &list); + list_add_tail(&d, &list); + + /* before: [list] -> a -> b -> c -> d */ + list_rotate_to_front(&c, &list); + /* after: [list] -> c -> d -> a -> b */ + + list_for_each(ptr, &list) { + KUNIT_EXPECT_PTR_EQ(test, ptr, list_values[i]); + i++; + } + KUNIT_EXPECT_EQ(test, i, 4); +} + +static void list_test_list_is_singular(struct kunit *test) +{ + struct list_head a, b; + LIST_HEAD(list); + + /* [list] empty */ + KUNIT_EXPECT_FALSE(test, list_is_singular(&list)); + + list_add_tail(&a, &list); + + /* [list] -> a */ + KUNIT_EXPECT_TRUE(test, list_is_singular(&list)); + + list_add_tail(&b, &list); + + /* [list] -> a -> b */ + KUNIT_EXPECT_FALSE(test, list_is_singular(&list)); +} + +static void list_test_list_cut_position(struct kunit *test) +{ + struct list_head entries[3], *cur; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&entries[0], &list1); + list_add_tail(&entries[1], &list1); + list_add_tail(&entries[2], &list1); + + /* before: [list1] -> entries[0] -> entries[1] -> entries[2] */ + list_cut_position(&list2, &list1, &entries[1]); + /* after: [list2] -> entries[0] -> entries[1], [list1] -> entries[2] */ + + list_for_each(cur, &list2) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 2); + + list_for_each(cur, &list1) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } +} + +static void list_test_list_cut_before(struct kunit *test) +{ + struct list_head entries[3], *cur; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&entries[0], &list1); + list_add_tail(&entries[1], &list1); + list_add_tail(&entries[2], &list1); + + /* before: [list1] -> entries[0] -> entries[1] -> entries[2] */ + list_cut_before(&list2, &list1, &entries[1]); + /* after: [list2] -> entries[0], [list1] -> entries[1] -> entries[2] */ + + list_for_each(cur, &list2) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 1); + + list_for_each(cur, &list1) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } +} + +static void list_test_list_splice(struct kunit *test) +{ + struct list_head entries[5], *cur; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&entries[0], &list1); + list_add_tail(&entries[1], &list1); + list_add_tail(&entries[2], &list2); + list_add_tail(&entries[3], &list2); + list_add_tail(&entries[4], &list1); + + /* before: [list1]->e[0]->e[1]->e[4], [list2]->e[2]->e[3] */ + list_splice(&list2, &entries[1]); + /* after: [list1]->e[0]->e[1]->e[2]->e[3]->e[4], [list2] uninit */ + + list_for_each(cur, &list1) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 5); +} + +static void list_test_list_splice_tail(struct kunit *test) +{ + struct list_head entries[5], *cur; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&entries[0], &list1); + list_add_tail(&entries[1], &list1); + list_add_tail(&entries[2], &list2); + list_add_tail(&entries[3], &list2); + list_add_tail(&entries[4], &list1); + + /* before: [list1]->e[0]->e[1]->e[4], [list2]->e[2]->e[3] */ + list_splice_tail(&list2, &entries[4]); + /* after: [list1]->e[0]->e[1]->e[2]->e[3]->e[4], [list2] uninit */ + + list_for_each(cur, &list1) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 5); +} + +static void list_test_list_splice_init(struct kunit *test) +{ + struct list_head entries[5], *cur; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&entries[0], &list1); + list_add_tail(&entries[1], &list1); + list_add_tail(&entries[2], &list2); + list_add_tail(&entries[3], &list2); + list_add_tail(&entries[4], &list1); + + /* before: [list1]->e[0]->e[1]->e[4], [list2]->e[2]->e[3] */ + list_splice_init(&list2, &entries[1]); + /* after: [list1]->e[0]->e[1]->e[2]->e[3]->e[4], [list2] empty */ + + list_for_each(cur, &list1) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 5); + + KUNIT_EXPECT_TRUE(test, list_empty_careful(&list2)); +} + +static void list_test_list_splice_tail_init(struct kunit *test) +{ + struct list_head entries[5], *cur; + LIST_HEAD(list1); + LIST_HEAD(list2); + int i = 0; + + list_add_tail(&entries[0], &list1); + list_add_tail(&entries[1], &list1); + list_add_tail(&entries[2], &list2); + list_add_tail(&entries[3], &list2); + list_add_tail(&entries[4], &list1); + + /* before: [list1]->e[0]->e[1]->e[4], [list2]->e[2]->e[3] */ + list_splice_tail_init(&list2, &entries[4]); + /* after: [list1]->e[0]->e[1]->e[2]->e[3]->e[4], [list2] empty */ + + list_for_each(cur, &list1) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 5); + + KUNIT_EXPECT_TRUE(test, list_empty_careful(&list2)); +} + +static void list_test_list_entry(struct kunit *test) +{ + struct list_test_struct test_struct; + + KUNIT_EXPECT_PTR_EQ(test, &test_struct, list_entry(&(test_struct.list), + struct list_test_struct, list)); +} + +static void list_test_list_first_entry(struct kunit *test) +{ + struct list_test_struct test_struct1, test_struct2; + LIST_HEAD(list); + + list_add_tail(&test_struct1.list, &list); + list_add_tail(&test_struct2.list, &list); + + + KUNIT_EXPECT_PTR_EQ(test, &test_struct1, list_first_entry(&list, + struct list_test_struct, list)); +} + +static void list_test_list_last_entry(struct kunit *test) +{ + struct list_test_struct test_struct1, test_struct2; + LIST_HEAD(list); + + list_add_tail(&test_struct1.list, &list); + list_add_tail(&test_struct2.list, &list); + + + KUNIT_EXPECT_PTR_EQ(test, &test_struct2, list_last_entry(&list, + struct list_test_struct, list)); +} + +static void list_test_list_first_entry_or_null(struct kunit *test) +{ + struct list_test_struct test_struct1, test_struct2; + LIST_HEAD(list); + + KUNIT_EXPECT_FALSE(test, list_first_entry_or_null(&list, + struct list_test_struct, list)); + + list_add_tail(&test_struct1.list, &list); + list_add_tail(&test_struct2.list, &list); + + KUNIT_EXPECT_PTR_EQ(test, &test_struct1, + list_first_entry_or_null(&list, + struct list_test_struct, list)); +} + +static void list_test_list_next_entry(struct kunit *test) +{ + struct list_test_struct test_struct1, test_struct2; + LIST_HEAD(list); + + list_add_tail(&test_struct1.list, &list); + list_add_tail(&test_struct2.list, &list); + + + KUNIT_EXPECT_PTR_EQ(test, &test_struct2, list_next_entry(&test_struct1, + list)); +} + +static void list_test_list_prev_entry(struct kunit *test) +{ + struct list_test_struct test_struct1, test_struct2; + LIST_HEAD(list); + + list_add_tail(&test_struct1.list, &list); + list_add_tail(&test_struct2.list, &list); + + + KUNIT_EXPECT_PTR_EQ(test, &test_struct1, list_prev_entry(&test_struct2, + list)); +} + +static void list_test_list_for__each(struct kunit *test) +{ + struct list_head entries[3], *cur; + LIST_HEAD(list); + int i = 0; + + list_add_tail(&entries[0], &list); + list_add_tail(&entries[1], &list); + list_add_tail(&entries[2], &list); + + list_for_each(cur, &list) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 3); +} + +static void list_test_list_for__each_prev(struct kunit *test) +{ + struct list_head entries[3], *cur; + LIST_HEAD(list); + int i = 2; + + list_add_tail(&entries[0], &list); + list_add_tail(&entries[1], &list); + list_add_tail(&entries[2], &list); + + list_for_each_prev(cur, &list) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + i--; + } + + KUNIT_EXPECT_EQ(test, i, -1); +} + +static void list_test_list_for__each_safe(struct kunit *test) +{ + struct list_head entries[3], *cur, *n; + LIST_HEAD(list); + int i = 0; + + + list_add_tail(&entries[0], &list); + list_add_tail(&entries[1], &list); + list_add_tail(&entries[2], &list); + + list_for_each_safe(cur, n, &list) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + list_del(&entries[i]); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 3); + KUNIT_EXPECT_TRUE(test, list_empty(&list)); +} + +static void list_test_list_for__each_prev_safe(struct kunit *test) +{ + struct list_head entries[3], *cur, *n; + LIST_HEAD(list); + int i = 2; + + list_add_tail(&entries[0], &list); + list_add_tail(&entries[1], &list); + list_add_tail(&entries[2], &list); + + list_for_each_prev_safe(cur, n, &list) { + KUNIT_EXPECT_PTR_EQ(test, cur, &entries[i]); + list_del(&entries[i]); + i--; + } + + KUNIT_EXPECT_EQ(test, i, -1); + KUNIT_EXPECT_TRUE(test, list_empty(&list)); +} + +static void list_test_list_for__each_entry(struct kunit *test) +{ + struct list_test_struct entries[5], *cur; + static LIST_HEAD(list); + int i = 0; + + for (i = 0; i < 5; ++i) { + entries[i].data = i; + list_add_tail(&entries[i].list, &list); + } + + i = 0; + + list_for_each_entry(cur, &list, list) { + KUNIT_EXPECT_EQ(test, cur->data, i); + i++; + } + + KUNIT_EXPECT_EQ(test, i, 5); +} + +static void list_test_list_for__each_entry_reverse(struct kunit *test) +{ + struct list_test_struct entries[5], *cur; + static LIST_HEAD(list); + int i = 0; + + for (i = 0; i < 5; ++i) { + entries[i].data = i; + list_add_tail(&entries[i].list, &list); + } + + i = 4; + + list_for_each_entry_reverse(cur, &list, list) { + KUNIT_EXPECT_EQ(test, cur->data, i); + i--; + } + + KUNIT_EXPECT_EQ(test, i, -1); +} + +static struct kunit_case list_test_cases[] = { + KUNIT_CASE(list_test_list_init), + KUNIT_CASE(list_test_list_add), + KUNIT_CASE(list_test_list_add_tail), + KUNIT_CASE(list_test_list_del), + KUNIT_CASE(list_test_list_replace), + KUNIT_CASE(list_test_list_replace_init), + KUNIT_CASE(list_test_list_swap), + KUNIT_CASE(list_test_list_del_init), + KUNIT_CASE(list_test_list_move), + KUNIT_CASE(list_test_list_move_tail), + KUNIT_CASE(list_test_list_bulk_move_tail), + KUNIT_CASE(list_test_list_is_first), + KUNIT_CASE(list_test_list_is_last), + KUNIT_CASE(list_test_list_empty), + KUNIT_CASE(list_test_list_empty_careful), + KUNIT_CASE(list_test_list_rotate_left), + KUNIT_CASE(list_test_list_rotate_to_front), + KUNIT_CASE(list_test_list_is_singular), + KUNIT_CASE(list_test_list_cut_position), + KUNIT_CASE(list_test_list_cut_before), + KUNIT_CASE(list_test_list_splice), + KUNIT_CASE(list_test_list_splice_tail), + KUNIT_CASE(list_test_list_splice_init), + KUNIT_CASE(list_test_list_splice_tail_init), + KUNIT_CASE(list_test_list_entry), + KUNIT_CASE(list_test_list_first_entry), + KUNIT_CASE(list_test_list_last_entry), + KUNIT_CASE(list_test_list_first_entry_or_null), + KUNIT_CASE(list_test_list_next_entry), + KUNIT_CASE(list_test_list_prev_entry), + KUNIT_CASE(list_test_list_for__each), + KUNIT_CASE(list_test_list_for__each_prev), + KUNIT_CASE(list_test_list_for__each_safe), + KUNIT_CASE(list_test_list_for__each_prev_safe), + KUNIT_CASE(list_test_list_for__each_entry), + KUNIT_CASE(list_test_list_for__each_entry_reverse), + {}, +}; + +static struct kunit_suite list_test_module = { + .name = "list-kunit-test", + .test_cases = list_test_cases, +}; + +kunit_test_suite(list_test_module);