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kunit: add debugfs /sys/kernel/debug/kunit/<suite>/results display

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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
2020-03-26 14:25:07 +00:00
committed by Shuah Khan
parent 0d5792c9bc
commit e2219db280
7 changed files with 322 additions and 41 deletions
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54
include/kunit/test.h
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@@ -81,6 +81,9 @@ struct kunit_resource {
struct kunit;
/* Size of log associated with test. */
#define KUNIT_LOG_SIZE 512
/**
* struct kunit_case - represents an individual test case.
*
@@ -123,8 +126,14 @@ struct kunit_case {
/* private: internal use only. */
bool success;
char *log;
};
static inline char *kunit_status_to_string(bool status)
{
return status ? "ok" : "not ok";
}
/**
* KUNIT_CASE - A helper for creating a &struct kunit_case
*
@@ -157,6 +166,10 @@ struct kunit_suite {
int (*init)(struct kunit *test);
void (*exit)(struct kunit *test);
struct kunit_case *test_cases;
/* private - internal use only */
struct dentry *debugfs;
char *log;
};
/**
@@ -175,6 +188,7 @@ struct kunit {
/* private: internal use only. */
const char *name; /* Read only after initialization! */
char *log; /* Points at case log after initialization */
struct kunit_try_catch try_catch;
/*
* success starts as true, and may only be set to false during a
@@ -193,10 +207,19 @@ struct kunit {
struct list_head resources; /* Protected by lock. */
};
void kunit_init_test(struct kunit *test, const char *name);
void kunit_init_test(struct kunit *test, const char *name, char *log);
int kunit_run_tests(struct kunit_suite *suite);
size_t kunit_suite_num_test_cases(struct kunit_suite *suite);
unsigned int kunit_test_case_num(struct kunit_suite *suite,
struct kunit_case *test_case);
int __kunit_test_suites_init(struct kunit_suite **suites);
void __kunit_test_suites_exit(struct kunit_suite **suites);
/**
* kunit_test_suites() - used to register one or more &struct kunit_suite
* with KUnit.
@@ -226,20 +249,22 @@ int kunit_run_tests(struct kunit_suite *suite);
static struct kunit_suite *suites[] = { __VA_ARGS__, NULL}; \
static int kunit_test_suites_init(void) \
{ \
unsigned int i; \
for (i = 0; suites[i] != NULL; i++) \
kunit_run_tests(suites[i]); \
return 0; \
return __kunit_test_suites_init(suites); \
} \
late_initcall(kunit_test_suites_init); \
static void __exit kunit_test_suites_exit(void) \
{ \
return; \
return __kunit_test_suites_exit(suites); \
} \
module_exit(kunit_test_suites_exit)
#define kunit_test_suite(suite) kunit_test_suites(&suite)
#define kunit_suite_for_each_test_case(suite, test_case) \
for (test_case = suite->test_cases; test_case->run_case; test_case++)
bool kunit_suite_has_succeeded(struct kunit_suite *suite);
/*
* Like kunit_alloc_resource() below, but returns the struct kunit_resource
* object that contains the allocation. This is mostly for testing purposes.
@@ -356,8 +381,21 @@ static inline void *kunit_kzalloc(struct kunit *test, size_t size, gfp_t gfp)
void kunit_cleanup(struct kunit *test);
#define kunit_printk(lvl, test, fmt, ...) \
printk(lvl "\t# %s: " fmt, (test)->name, ##__VA_ARGS__)
void kunit_log_append(char *log, const char *fmt, ...);
/*
* printk and log to per-test or per-suite log buffer. Logging only done
* if CONFIG_KUNIT_DEBUGFS is 'y'; if it is 'n', no log is allocated/used.
*/
#define kunit_log(lvl, test_or_suite, fmt, ...) \
do { \
printk(lvl fmt, ##__VA_ARGS__); \
kunit_log_append((test_or_suite)->log, fmt "\n", \
##__VA_ARGS__); \
} while (0)
#define kunit_printk(lvl, test, fmt, ...) \
kunit_log(lvl, test, "\t# %s: " fmt, (test)->name, ##__VA_ARGS__)
/**
* kunit_info() - Prints an INFO level message associated with @test.