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kunit: add support for named resources

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The kunit resources API allows for custom initialization and
cleanup code (init/fini); here a new resource add function sets
the "struct kunit_resource" "name" field, and calls the standard
add function.  Having a simple way to name resources is
useful in cases such as multithreaded tests where a set of
resources are shared among threads; a pointer to the
"struct kunit *" test state then is all that is needed to
retrieve and use named resources.  Support is provided to add,
find and destroy named resources; the latter two are simply
wrappers that use a "match-by-name" callback.

If an attempt to add a resource with a name that already exists
is made kunit_add_named_resource() will return -EEXIST.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Alan Maguire 2020-05-29 22:46:21 +01:00 committed by Shuah Khan
parent d4cdd146d0
commit 725aca9585
3 changed files with 115 additions and 0 deletions
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54
include/kunit/test.h
View File

@ -72,9 +72,15 @@ typedef void (*kunit_resource_free_t)(struct kunit_resource *);
* return kunit_alloc_resource(test, kunit_kmalloc_init,
* kunit_kmalloc_free, &params);
* }
*
* Resources can also be named, with lookup/removal done on a name
* basis also. kunit_add_named_resource(), kunit_find_named_resource()
* and kunit_destroy_named_resource(). Resource names must be
* unique within the test instance.
*/
struct kunit_resource {
void *data;
const char *name; /* optional name */
/* private: internal use only. */
kunit_resource_free_t free;
@ -344,6 +350,21 @@ int kunit_add_resource(struct kunit *test,
kunit_resource_free_t free,
struct kunit_resource *res,
void *data);
/**
* kunit_add_named_resource() - Add a named *test managed resource*.
* @test: The test context object.
* @init: a user-supplied function to initialize the resource data, if needed.
* @free: a user-supplied function to free the resource data, if needed.
* @name_data: name and data to be set for resource.
*/
int kunit_add_named_resource(struct kunit *test,
kunit_resource_init_t init,
kunit_resource_free_t free,
struct kunit_resource *res,
const char *name,
void *data);
/**
* kunit_alloc_resource() - Allocates a *test managed resource*.
* @test: The test context object.
@ -398,6 +419,19 @@ static inline bool kunit_resource_instance_match(struct kunit *test,
return res->data == match_data;
}
/**
* kunit_resource_name_match() - Match a resource with the same name.
* @test: Test case to which the resource belongs.
* @res: The resource.
* @match_name: The name to match against.
*/
static inline bool kunit_resource_name_match(struct kunit *test,
struct kunit_resource *res,
void *match_name)
{
return res->name && strcmp(res->name, match_name) == 0;
}
/**
* kunit_find_resource() - Find a resource using match function/data.
* @test: Test case to which the resource belongs.
@ -426,6 +460,19 @@ kunit_find_resource(struct kunit *test,
return found;
}
/**
* kunit_find_named_resource() - Find a resource using match name.
* @test: Test case to which the resource belongs.
* @name: match name.
*/
static inline struct kunit_resource *
kunit_find_named_resource(struct kunit *test,
const char *name)
{
return kunit_find_resource(test, kunit_resource_name_match,
(void *)name);
}
/**
* kunit_destroy_resource() - Find a kunit_resource and destroy it.
* @test: Test case to which the resource belongs.
@ -439,6 +486,13 @@ int kunit_destroy_resource(struct kunit *test,
kunit_resource_match_t match,
void *match_data);
static inline int kunit_destroy_named_resource(struct kunit *test,
const char *name)
{
return kunit_destroy_resource(test, kunit_resource_name_match,
(void *)name);
}
/**
* kunit_remove_resource: remove resource from resource list associated with
* test.

37
lib/kunit/kunit-test.c
View File

@ -325,6 +325,42 @@ static void kunit_resource_test_static(struct kunit *test)
KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
}
static void kunit_resource_test_named(struct kunit *test)
{
struct kunit_resource res1, res2, *found = NULL;
struct kunit_test_resource_context ctx;
KUNIT_EXPECT_EQ(test,
kunit_add_named_resource(test, NULL, NULL, &res1,
"resource_1", &ctx),
0);
KUNIT_EXPECT_PTR_EQ(test, res1.data, (void *)&ctx);
KUNIT_EXPECT_EQ(test,
kunit_add_named_resource(test, NULL, NULL, &res1,
"resource_1", &ctx),
-EEXIST);
KUNIT_EXPECT_EQ(test,
kunit_add_named_resource(test, NULL, NULL, &res2,
"resource_2", &ctx),
0);
found = kunit_find_named_resource(test, "resource_1");
KUNIT_EXPECT_PTR_EQ(test, found, &res1);
if (found)
kunit_put_resource(&res1);
KUNIT_EXPECT_EQ(test, kunit_destroy_named_resource(test, "resource_2"),
0);
kunit_cleanup(test);
KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
}
static int kunit_resource_test_init(struct kunit *test)
{
struct kunit_test_resource_context *ctx =
@ -354,6 +390,7 @@ static struct kunit_case kunit_resource_test_cases[] = {
KUNIT_CASE(kunit_resource_test_cleanup_resources),
KUNIT_CASE(kunit_resource_test_proper_free_ordering),
KUNIT_CASE(kunit_resource_test_static),
KUNIT_CASE(kunit_resource_test_named),
{}
};

24
lib/kunit/test.c
View File

@ -441,6 +441,30 @@ int kunit_add_resource(struct kunit *test,
}
EXPORT_SYMBOL_GPL(kunit_add_resource);
int kunit_add_named_resource(struct kunit *test,
kunit_resource_init_t init,
kunit_resource_free_t free,
struct kunit_resource *res,
const char *name,
void *data)
{
struct kunit_resource *existing;
if (!name)
return -EINVAL;
existing = kunit_find_named_resource(test, name);
if (existing) {
kunit_put_resource(existing);
return -EEXIST;
}
res->name = name;
return kunit_add_resource(test, init, free, res, data);
}
EXPORT_SYMBOL_GPL(kunit_add_named_resource);
struct kunit_resource *kunit_alloc_and_get_resource(struct kunit *test,
kunit_resource_init_t init,
kunit_resource_free_t free,