kunit: add debugfs /sys/kernel/debug/kunit/<suite>/results display
add debugfs support for displaying kunit test suite results; this is especially useful for module-loaded tests to allow disentangling of test result display from other dmesg events. debugfs support is provided if CONFIG_KUNIT_DEBUGFS=y. As well as printk()ing messages, we append them to a per-test log. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Reviewed-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Alan Maguire
Shuah Khan
Родитель
0d5792c9bc
Коммит
e2219db280
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@ -81,6 +81,9 @@ struct kunit_resource {
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struct kunit;
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/* Size of log associated with test. */
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#define KUNIT_LOG_SIZE 512
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/**
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* struct kunit_case - represents an individual test case.
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*
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@ -123,8 +126,14 @@ struct kunit_case {
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/* private: internal use only. */
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bool success;
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char *log;
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};
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static inline char *kunit_status_to_string(bool status)
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{
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return status ? "ok" : "not ok";
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}
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/**
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* KUNIT_CASE - A helper for creating a &struct kunit_case
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*
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@ -157,6 +166,10 @@ struct kunit_suite {
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int (*init)(struct kunit *test);
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void (*exit)(struct kunit *test);
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struct kunit_case *test_cases;
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/* private - internal use only */
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struct dentry *debugfs;
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char *log;
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};
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/**
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@ -175,6 +188,7 @@ struct kunit {
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/* private: internal use only. */
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const char *name; /* Read only after initialization! */
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char *log; /* Points at case log after initialization */
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struct kunit_try_catch try_catch;
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/*
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* success starts as true, and may only be set to false during a
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@ -193,10 +207,19 @@ struct kunit {
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struct list_head resources; /* Protected by lock. */
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};
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void kunit_init_test(struct kunit *test, const char *name);
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void kunit_init_test(struct kunit *test, const char *name, char *log);
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int kunit_run_tests(struct kunit_suite *suite);
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size_t kunit_suite_num_test_cases(struct kunit_suite *suite);
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unsigned int kunit_test_case_num(struct kunit_suite *suite,
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struct kunit_case *test_case);
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int __kunit_test_suites_init(struct kunit_suite **suites);
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void __kunit_test_suites_exit(struct kunit_suite **suites);
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/**
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* kunit_test_suites() - used to register one or more &struct kunit_suite
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* with KUnit.
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@ -226,20 +249,22 @@ int kunit_run_tests(struct kunit_suite *suite);
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static struct kunit_suite *suites[] = { __VA_ARGS__, NULL}; \
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static int kunit_test_suites_init(void) \
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{ \
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unsigned int i; \
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for (i = 0; suites[i] != NULL; i++) \
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kunit_run_tests(suites[i]); \
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return 0; \
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return __kunit_test_suites_init(suites); \
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} \
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late_initcall(kunit_test_suites_init); \
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static void __exit kunit_test_suites_exit(void) \
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{ \
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return; \
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return __kunit_test_suites_exit(suites); \
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} \
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module_exit(kunit_test_suites_exit)
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#define kunit_test_suite(suite) kunit_test_suites(&suite)
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#define kunit_suite_for_each_test_case(suite, test_case) \
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for (test_case = suite->test_cases; test_case->run_case; test_case++)
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bool kunit_suite_has_succeeded(struct kunit_suite *suite);
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/*
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* Like kunit_alloc_resource() below, but returns the struct kunit_resource
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* object that contains the allocation. This is mostly for testing purposes.
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@ -356,8 +381,21 @@ static inline void *kunit_kzalloc(struct kunit *test, size_t size, gfp_t gfp)
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void kunit_cleanup(struct kunit *test);
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#define kunit_printk(lvl, test, fmt, ...) \
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printk(lvl "\t# %s: " fmt, (test)->name, ##__VA_ARGS__)
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void kunit_log_append(char *log, const char *fmt, ...);
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/*
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* printk and log to per-test or per-suite log buffer. Logging only done
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* if CONFIG_KUNIT_DEBUGFS is 'y'; if it is 'n', no log is allocated/used.
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*/
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#define kunit_log(lvl, test_or_suite, fmt, ...) \
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do { \
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printk(lvl fmt, ##__VA_ARGS__); \
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kunit_log_append((test_or_suite)->log, fmt "\n", \
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##__VA_ARGS__); \
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} while (0)
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#define kunit_printk(lvl, test, fmt, ...) \
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kunit_log(lvl, test, "\t# %s: " fmt, (test)->name, ##__VA_ARGS__)
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/**
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* kunit_info() - Prints an INFO level message associated with @test.
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@ -14,6 +14,14 @@ menuconfig KUNIT
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if KUNIT
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config KUNIT_DEBUGFS
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bool "KUnit - Enable /sys/kernel/debug/kunit debugfs representation"
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help
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Enable debugfs representation for kunit. Currently this consists
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of /sys/kernel/debug/kunit/<test_suite>/results files for each
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test suite, which allow users to see results of the last test suite
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run that occurred.
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config KUNIT_TEST
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tristate "KUnit test for KUnit"
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help
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@ -5,6 +5,10 @@ kunit-objs += test.o \
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assert.o \
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try-catch.o
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ifeq ($(CONFIG_KUNIT_DEBUGFS),y)
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kunit-objs += debugfs.o
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endif
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obj-$(CONFIG_KUNIT_TEST) += kunit-test.o
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# string-stream-test compiles built-in only.
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@ -0,0 +1,116 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2020, Oracle and/or its affiliates.
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* Author: Alan Maguire <alan.maguire@oracle.com>
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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <kunit/test.h>
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#include "string-stream.h"
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#define KUNIT_DEBUGFS_ROOT "kunit"
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#define KUNIT_DEBUGFS_RESULTS "results"
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/*
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* Create a debugfs representation of test suites:
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*
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* Path Semantics
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* /sys/kernel/debug/kunit/<testsuite>/results Show results of last run for
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* testsuite
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*
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*/
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static struct dentry *debugfs_rootdir;
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void kunit_debugfs_cleanup(void)
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{
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debugfs_remove_recursive(debugfs_rootdir);
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}
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void kunit_debugfs_init(void)
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{
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if (!debugfs_rootdir)
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debugfs_rootdir = debugfs_create_dir(KUNIT_DEBUGFS_ROOT, NULL);
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}
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static void debugfs_print_result(struct seq_file *seq,
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struct kunit_suite *suite,
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struct kunit_case *test_case)
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{
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if (!test_case || !test_case->log)
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return;
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seq_printf(seq, "%s", test_case->log);
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}
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/*
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* /sys/kernel/debug/kunit/<testsuite>/results shows all results for testsuite.
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*/
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static int debugfs_print_results(struct seq_file *seq, void *v)
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{
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struct kunit_suite *suite = (struct kunit_suite *)seq->private;
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bool success = kunit_suite_has_succeeded(suite);
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struct kunit_case *test_case;
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if (!suite || !suite->log)
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return 0;
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seq_printf(seq, "%s", suite->log);
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kunit_suite_for_each_test_case(suite, test_case)
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debugfs_print_result(seq, suite, test_case);
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seq_printf(seq, "%s %d - %s\n",
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kunit_status_to_string(success), 1, suite->name);
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return 0;
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}
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static int debugfs_release(struct inode *inode, struct file *file)
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{
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return single_release(inode, file);
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}
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static int debugfs_results_open(struct inode *inode, struct file *file)
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{
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struct kunit_suite *suite;
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suite = (struct kunit_suite *)inode->i_private;
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return single_open(file, debugfs_print_results, suite);
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}
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static const struct file_operations debugfs_results_fops = {
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.open = debugfs_results_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = debugfs_release,
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};
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void kunit_debugfs_create_suite(struct kunit_suite *suite)
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{
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struct kunit_case *test_case;
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/* Allocate logs before creating debugfs representation. */
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suite->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);
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kunit_suite_for_each_test_case(suite, test_case)
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test_case->log = kzalloc(KUNIT_LOG_SIZE, GFP_KERNEL);
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suite->debugfs = debugfs_create_dir(suite->name, debugfs_rootdir);
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debugfs_create_file(KUNIT_DEBUGFS_RESULTS, S_IFREG | 0444,
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suite->debugfs,
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suite, &debugfs_results_fops);
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}
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void kunit_debugfs_destroy_suite(struct kunit_suite *suite)
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{
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struct kunit_case *test_case;
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debugfs_remove_recursive(suite->debugfs);
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kfree(suite->log);
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kunit_suite_for_each_test_case(suite, test_case)
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kfree(test_case->log);
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}
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@ -0,0 +1,30 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020, Oracle and/or its affiliates.
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*/
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#ifndef _KUNIT_DEBUGFS_H
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#define _KUNIT_DEBUGFS_H
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#include <kunit/test.h>
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#ifdef CONFIG_KUNIT_DEBUGFS
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void kunit_debugfs_create_suite(struct kunit_suite *suite);
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void kunit_debugfs_destroy_suite(struct kunit_suite *suite);
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void kunit_debugfs_init(void);
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void kunit_debugfs_cleanup(void);
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#else
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static inline void kunit_debugfs_create_suite(struct kunit_suite *suite) { }
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static inline void kunit_debugfs_destroy_suite(struct kunit_suite *suite) { }
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static inline void kunit_debugfs_init(void) { }
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static inline void kunit_debugfs_cleanup(void) { }
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#endif /* CONFIG_KUNIT_DEBUGFS */
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#endif /* _KUNIT_DEBUGFS_H */
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@ -134,7 +134,7 @@ static void kunit_resource_test_init_resources(struct kunit *test)
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{
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struct kunit_test_resource_context *ctx = test->priv;
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kunit_init_test(&ctx->test, "testing_test_init_test");
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kunit_init_test(&ctx->test, "testing_test_init_test", NULL);
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KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
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}
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@ -301,7 +301,7 @@ static int kunit_resource_test_init(struct kunit *test)
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test->priv = ctx;
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kunit_init_test(&ctx->test, "test_test_context");
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kunit_init_test(&ctx->test, "test_test_context", NULL);
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return 0;
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}
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147
lib/kunit/test.c
147
lib/kunit/test.c
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@ -10,6 +10,7 @@
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#include <linux/kernel.h>
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#include <linux/sched/debug.h>
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#include "debugfs.h"
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#include "string-stream.h"
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#include "try-catch-impl.h"
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@ -28,73 +29,116 @@ static void kunit_print_tap_version(void)
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}
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}
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static size_t kunit_test_cases_len(struct kunit_case *test_cases)
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/*
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* Append formatted message to log, size of which is limited to
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* KUNIT_LOG_SIZE bytes (including null terminating byte).
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*/
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void kunit_log_append(char *log, const char *fmt, ...)
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{
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char line[KUNIT_LOG_SIZE];
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va_list args;
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int len_left;
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if (!log)
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return;
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len_left = KUNIT_LOG_SIZE - strlen(log) - 1;
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if (len_left <= 0)
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return;
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va_start(args, fmt);
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vsnprintf(line, sizeof(line), fmt, args);
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va_end(args);
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strncat(log, line, len_left);
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}
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EXPORT_SYMBOL_GPL(kunit_log_append);
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size_t kunit_suite_num_test_cases(struct kunit_suite *suite)
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{
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struct kunit_case *test_case;
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size_t len = 0;
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for (test_case = test_cases; test_case->run_case; test_case++)
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kunit_suite_for_each_test_case(suite, test_case)
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len++;
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return len;
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}
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EXPORT_SYMBOL_GPL(kunit_suite_num_test_cases);
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static void kunit_print_subtest_start(struct kunit_suite *suite)
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{
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kunit_print_tap_version();
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pr_info("\t# Subtest: %s\n", suite->name);
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pr_info("\t1..%zd\n", kunit_test_cases_len(suite->test_cases));
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kunit_log(KERN_INFO, suite, "\t# Subtest: %s", suite->name);
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kunit_log(KERN_INFO, suite, "\t1..%zd",
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kunit_suite_num_test_cases(suite));
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}
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static void kunit_print_ok_not_ok(bool should_indent,
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static void kunit_print_ok_not_ok(void *test_or_suite,
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bool is_test,
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bool is_ok,
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size_t test_number,
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const char *description)
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{
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const char *indent, *ok_not_ok;
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struct kunit_suite *suite = is_test ? NULL : test_or_suite;
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struct kunit *test = is_test ? test_or_suite : NULL;
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if (should_indent)
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indent = "\t";
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/*
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* We do not log the test suite results as doing so would
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* mean debugfs display would consist of the test suite
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* description and status prior to individual test results.
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* Hence directly printk the suite status, and we will
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* separately seq_printf() the suite status for the debugfs
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* representation.
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*/
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if (suite)
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pr_info("%s %zd - %s",
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kunit_status_to_string(is_ok),
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test_number, description);
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else
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indent = "";
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if (is_ok)
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ok_not_ok = "ok";
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else
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ok_not_ok = "not ok";
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pr_info("%s%s %zd - %s\n", indent, ok_not_ok, test_number, description);
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kunit_log(KERN_INFO, test, "\t%s %zd - %s",
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kunit_status_to_string(is_ok),
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test_number, description);
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}
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static bool kunit_suite_has_succeeded(struct kunit_suite *suite)
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bool kunit_suite_has_succeeded(struct kunit_suite *suite)
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{
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const struct kunit_case *test_case;
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for (test_case = suite->test_cases; test_case->run_case; test_case++)
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kunit_suite_for_each_test_case(suite, test_case) {
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if (!test_case->success)
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return false;
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}
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return true;
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}
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EXPORT_SYMBOL_GPL(kunit_suite_has_succeeded);
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static void kunit_print_subtest_end(struct kunit_suite *suite)
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{
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static size_t kunit_suite_counter = 1;
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kunit_print_ok_not_ok(false,
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kunit_print_ok_not_ok((void *)suite, false,
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kunit_suite_has_succeeded(suite),
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kunit_suite_counter++,
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suite->name);
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}
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static void kunit_print_test_case_ok_not_ok(struct kunit_case *test_case,
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size_t test_number)
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unsigned int kunit_test_case_num(struct kunit_suite *suite,
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struct kunit_case *test_case)
|
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{
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kunit_print_ok_not_ok(true,
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test_case->success,
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||||
test_number,
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||||
test_case->name);
|
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struct kunit_case *tc;
|
||||
unsigned int i = 1;
|
||||
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||||
kunit_suite_for_each_test_case(suite, tc) {
|
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if (tc == test_case)
|
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return i;
|
||||
i++;
|
||||
}
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||||
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return 0;
|
||||
}
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EXPORT_SYMBOL_GPL(kunit_test_case_num);
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||||
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||||
static void kunit_print_string_stream(struct kunit *test,
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||||
struct string_stream *stream)
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@ -102,6 +146,9 @@ static void kunit_print_string_stream(struct kunit *test,
|
|||
struct string_stream_fragment *fragment;
|
||||
char *buf;
|
||||
|
||||
if (string_stream_is_empty(stream))
|
||||
return;
|
||||
|
||||
buf = string_stream_get_string(stream);
|
||||
if (!buf) {
|
||||
kunit_err(test,
|
||||
|
|
@ -175,11 +222,14 @@ void kunit_do_assertion(struct kunit *test,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(kunit_do_assertion);
|
||||
|
||||
void kunit_init_test(struct kunit *test, const char *name)
|
||||
void kunit_init_test(struct kunit *test, const char *name, char *log)
|
||||
{
|
||||
spin_lock_init(&test->lock);
|
||||
INIT_LIST_HEAD(&test->resources);
|
||||
test->name = name;
|
||||
test->log = log;
|
||||
if (test->log)
|
||||
test->log[0] = '\0';
|
||||
test->success = true;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(kunit_init_test);
|
||||
|
|
@ -290,7 +340,7 @@ static void kunit_run_case_catch_errors(struct kunit_suite *suite,
|
|||
struct kunit_try_catch *try_catch;
|
||||
struct kunit test;
|
||||
|
||||
kunit_init_test(&test, test_case->name);
|
||||
kunit_init_test(&test, test_case->name, test_case->log);
|
||||
try_catch = &test.try_catch;
|
||||
|
||||
kunit_try_catch_init(try_catch,
|
||||
|
|
@ -303,19 +353,20 @@ static void kunit_run_case_catch_errors(struct kunit_suite *suite,
|
|||
kunit_try_catch_run(try_catch, &context);
|
||||
|
||||
test_case->success = test.success;
|
||||
|
||||
kunit_print_ok_not_ok(&test, true, test_case->success,
|
||||
kunit_test_case_num(suite, test_case),
|
||||
test_case->name);
|
||||
}
|
||||
|
||||
int kunit_run_tests(struct kunit_suite *suite)
|
||||
{
|
||||
struct kunit_case *test_case;
|
||||
size_t test_case_count = 1;
|
||||
|
||||
kunit_print_subtest_start(suite);
|
||||
|
||||
for (test_case = suite->test_cases; test_case->run_case; test_case++) {
|
||||
kunit_suite_for_each_test_case(suite, test_case)
|
||||
kunit_run_case_catch_errors(suite, test_case);
|
||||
kunit_print_test_case_ok_not_ok(test_case, test_case_count++);
|
||||
}
|
||||
|
||||
kunit_print_subtest_end(suite);
|
||||
|
||||
|
|
@ -323,6 +374,37 @@ int kunit_run_tests(struct kunit_suite *suite)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(kunit_run_tests);
|
||||
|
||||
static void kunit_init_suite(struct kunit_suite *suite)
|
||||
{
|
||||
kunit_debugfs_create_suite(suite);
|
||||
}
|
||||
|
||||
int __kunit_test_suites_init(struct kunit_suite **suites)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; suites[i] != NULL; i++) {
|
||||
kunit_init_suite(suites[i]);
|
||||
kunit_run_tests(suites[i]);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(__kunit_test_suites_init);
|
||||
|
||||
static void kunit_exit_suite(struct kunit_suite *suite)
|
||||
{
|
||||
kunit_debugfs_destroy_suite(suite);
|
||||
}
|
||||
|
||||
void __kunit_test_suites_exit(struct kunit_suite **suites)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; suites[i] != NULL; i++)
|
||||
kunit_exit_suite(suites[i]);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(__kunit_test_suites_exit);
|
||||
|
||||
struct kunit_resource *kunit_alloc_and_get_resource(struct kunit *test,
|
||||
kunit_resource_init_t init,
|
||||
kunit_resource_free_t free,
|
||||
|
|
@ -489,12 +571,15 @@ EXPORT_SYMBOL_GPL(kunit_cleanup);
|
|||
|
||||
static int __init kunit_init(void)
|
||||
{
|
||||
kunit_debugfs_init();
|
||||
|
||||
return 0;
|
||||
}
|
||||
late_initcall(kunit_init);
|
||||
|
||||
static void __exit kunit_exit(void)
|
||||
{
|
||||
kunit_debugfs_cleanup();
|
||||
}
|
||||
module_exit(kunit_exit);
|
||||
|
||||
|
|
|
|||
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