Add KUNIT_INIT_TABLE to the INIT_DATA linker section.
Alter the KUnit macros to create init tests: kunit_test_init_section_suites
Update lib/kunit/executor.c to run both the suites in KUNIT_TABLE and KUNIT_INIT_TABLE.
Signed-off-by: Rae Moar rmoar@google.com --- Changes since v3: - Add to comments in test.h for kunit_test_init_section_suites macro to note init tests cannot be run after boot and the structs cannot be marked with __initdata
include/asm-generic/vmlinux.lds.h | 9 ++++- include/kunit/test.h | 30 +++++++++------ include/linux/module.h | 2 + kernel/module/main.c | 3 ++ lib/kunit/executor.c | 64 ++++++++++++++++++++++++++++--- lib/kunit/test.c | 26 +++++++++---- 6 files changed, 109 insertions(+), 25 deletions(-)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 1107905d37fc..5dd3a61d673d 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -700,7 +700,8 @@ THERMAL_TABLE(governor) \ EARLYCON_TABLE() \ LSM_TABLE() \ - EARLY_LSM_TABLE() + EARLY_LSM_TABLE() \ + KUNIT_INIT_TABLE()
#define INIT_TEXT \ *(.init.text .init.text.*) \ @@ -926,6 +927,12 @@ . = ALIGN(8); \ BOUNDED_SECTION_POST_LABEL(.kunit_test_suites, __kunit_suites, _start, _end)
+/* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */ +#define KUNIT_INIT_TABLE() \ + . = ALIGN(8); \ + BOUNDED_SECTION_POST_LABEL(.kunit_init_test_suites, \ + __kunit_init_suites, _start, _end) + #ifdef CONFIG_BLK_DEV_INITRD #define INIT_RAM_FS \ . = ALIGN(4); \ diff --git a/include/kunit/test.h b/include/kunit/test.h index 20ed9f9275c9..fe79cd736e94 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -337,6 +337,9 @@ void __kunit_test_suites_exit(struct kunit_suite **suites, int num_suites); void kunit_exec_run_tests(struct kunit_suite_set *suite_set, bool builtin); void kunit_exec_list_tests(struct kunit_suite_set *suite_set, bool include_attr);
+struct kunit_suite_set kunit_merge_suite_sets(struct kunit_suite_set init_suite_set, + struct kunit_suite_set suite_set); + #if IS_BUILTIN(CONFIG_KUNIT) int kunit_run_all_tests(void); #else @@ -371,6 +374,11 @@ static inline int kunit_run_all_tests(void)
#define kunit_test_suite(suite) kunit_test_suites(&suite)
+#define __kunit_init_test_suites(unique_array, ...) \ + static struct kunit_suite *unique_array[] \ + __aligned(sizeof(struct kunit_suite *)) \ + __used __section(".kunit_init_test_suites") = { __VA_ARGS__ } + /** * kunit_test_init_section_suites() - used to register one or more &struct * kunit_suite containing init functions or @@ -378,21 +386,21 @@ static inline int kunit_run_all_tests(void) * * @__suites: a statically allocated list of &struct kunit_suite. * - * This functions identically as kunit_test_suites() except that it suppresses - * modpost warnings for referencing functions marked __init or data marked - * __initdata; this is OK because currently KUnit only runs tests upon boot - * during the init phase or upon loading a module during the init phase. + * This functions similar to kunit_test_suites() except that it compiles the + * list of suites during init phase. + * + * This macro also suffixes the array and suite declarations it makes with + * _probe; so that modpost suppresses warnings about referencing init data + * for symbols named in this manner. * - * NOTE TO KUNIT DEVS: If we ever allow KUnit tests to be run after boot, these - * tests must be excluded. + * Note: these init tests are not able to be run after boot so there is no + * "run" debugfs file generated for these tests. * - * The only thing this macro does that's different from kunit_test_suites is - * that it suffixes the array and suite declarations it makes with _probe; - * modpost suppresses warnings about referencing init data for symbols named in - * this manner. + * Also, do not mark the suite or test case structs with __initdata because + * they will be used after the init phase with debugfs. */ #define kunit_test_init_section_suites(__suites...) \ - __kunit_test_suites(CONCATENATE(__UNIQUE_ID(array), _probe), \ + __kunit_init_test_suites(CONCATENATE(__UNIQUE_ID(array), _probe), \ ##__suites)
#define kunit_test_init_section_suite(suite) \ diff --git a/include/linux/module.h b/include/linux/module.h index a98e188cf37b..9cd0009bd050 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -540,6 +540,8 @@ struct module { struct static_call_site *static_call_sites; #endif #if IS_ENABLED(CONFIG_KUNIT) + int num_kunit_init_suites; + struct kunit_suite **kunit_init_suites; int num_kunit_suites; struct kunit_suite **kunit_suites; #endif diff --git a/kernel/module/main.c b/kernel/module/main.c index 98fedfdb8db5..36681911c05a 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -2199,6 +2199,9 @@ static int find_module_sections(struct module *mod, struct load_info *info) mod->kunit_suites = section_objs(info, ".kunit_test_suites", sizeof(*mod->kunit_suites), &mod->num_kunit_suites); + mod->kunit_init_suites = section_objs(info, ".kunit_init_test_suites", + sizeof(*mod->kunit_init_suites), + &mod->num_kunit_init_suites); #endif
mod->extable = section_objs(info, "__ex_table", diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c index 1236b3cd2fbb..847329c51e91 100644 --- a/lib/kunit/executor.c +++ b/lib/kunit/executor.c @@ -12,6 +12,8 @@ */ extern struct kunit_suite * const __kunit_suites_start[]; extern struct kunit_suite * const __kunit_suites_end[]; +extern struct kunit_suite * const __kunit_init_suites_start[]; +extern struct kunit_suite * const __kunit_init_suites_end[];
static char *action_param;
@@ -292,6 +294,33 @@ void kunit_exec_list_tests(struct kunit_suite_set *suite_set, bool include_attr) } }
+struct kunit_suite_set kunit_merge_suite_sets(struct kunit_suite_set init_suite_set, + struct kunit_suite_set suite_set) +{ + struct kunit_suite_set total_suite_set = {NULL, NULL}; + struct kunit_suite **total_suite_start = NULL; + size_t init_num_suites, num_suites, suite_size; + + init_num_suites = init_suite_set.end - init_suite_set.start; + num_suites = suite_set.end - suite_set.start; + suite_size = sizeof(suite_set.start); + + /* Allocate memory for array of all kunit suites */ + total_suite_start = kmalloc_array(init_num_suites + num_suites, suite_size, GFP_KERNEL); + if (!total_suite_start) + return total_suite_set; + + /* Append init suites and then all other kunit suites */ + memcpy(total_suite_start, init_suite_set.start, init_num_suites * suite_size); + memcpy(total_suite_start + init_num_suites, suite_set.start, num_suites * suite_size); + + /* Set kunit suite set start and end */ + total_suite_set.start = total_suite_start; + total_suite_set.end = total_suite_start + (init_num_suites + num_suites); + + return total_suite_set; +} + #if IS_BUILTIN(CONFIG_KUNIT)
static char *kunit_shutdown; @@ -313,21 +342,41 @@ static void kunit_handle_shutdown(void)
int kunit_run_all_tests(void) { - struct kunit_suite_set suite_set = { + struct kunit_suite_set suite_set = {NULL, NULL}; + struct kunit_suite_set filtered_suite_set = {NULL, NULL}; + struct kunit_suite_set init_suite_set = { + __kunit_init_suites_start, __kunit_init_suites_end, + }; + struct kunit_suite_set normal_suite_set = { __kunit_suites_start, __kunit_suites_end, }; + size_t init_num_suites = init_suite_set.end - init_suite_set.start; int err = 0; + + if (init_num_suites > 0) { + suite_set = kunit_merge_suite_sets(init_suite_set, normal_suite_set); + if (!suite_set.start) + goto out; + } else + suite_set = normal_suite_set; + if (!kunit_enabled()) { pr_info("kunit: disabled\n"); - goto out; + goto free_out; }
if (filter_glob_param || filter_param) { - suite_set = kunit_filter_suites(&suite_set, filter_glob_param, + filtered_suite_set = kunit_filter_suites(&suite_set, filter_glob_param, filter_param, filter_action_param, &err); + + /* Free original suite set before using filtered suite set */ + if (init_num_suites > 0) + kfree(suite_set.start); + suite_set = filtered_suite_set; + if (err) { pr_err("kunit executor: error filtering suites: %d\n", err); - goto out; + goto free_out; } }
@@ -340,9 +389,12 @@ int kunit_run_all_tests(void) else pr_err("kunit executor: unknown action '%s'\n", action_param);
- if (filter_glob_param || filter_param) { /* a copy was made of each suite */ +free_out: + if (filter_glob_param || filter_param) kunit_free_suite_set(suite_set); - } + else if (init_num_suites > 0) + /* Don't use kunit_free_suite_set because suites aren't individually allocated */ + kfree(suite_set.start);
out: kunit_handle_shutdown(); diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 0308865194bb..6c082911a85f 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -704,28 +704,40 @@ EXPORT_SYMBOL_GPL(__kunit_test_suites_exit); #ifdef CONFIG_MODULES static void kunit_module_init(struct module *mod) { - struct kunit_suite_set suite_set = { + struct kunit_suite_set suite_set, filtered_set; + struct kunit_suite_set normal_suite_set = { mod->kunit_suites, mod->kunit_suites + mod->num_kunit_suites, }; + struct kunit_suite_set init_suite_set = { + mod->kunit_init_suites, mod->kunit_init_suites + mod->num_kunit_init_suites, + }; const char *action = kunit_action(); int err = 0;
- suite_set = kunit_filter_suites(&suite_set, + if (mod->num_kunit_init_suites > 0) + suite_set = kunit_merge_suite_sets(init_suite_set, normal_suite_set); + else + suite_set = normal_suite_set; + + filtered_set = kunit_filter_suites(&suite_set, kunit_filter_glob() ?: "*.*", kunit_filter(), kunit_filter_action(), &err); if (err) pr_err("kunit module: error filtering suites: %d\n", err);
- mod->kunit_suites = (struct kunit_suite **)suite_set.start; - mod->num_kunit_suites = suite_set.end - suite_set.start; + mod->kunit_suites = (struct kunit_suite **)filtered_set.start; + mod->num_kunit_suites = filtered_set.end - filtered_set.start; + + if (mod->num_kunit_init_suites > 0) + kfree(suite_set.start);
if (!action) - kunit_exec_run_tests(&suite_set, false); + kunit_exec_run_tests(&filtered_set, false); else if (!strcmp(action, "list")) - kunit_exec_list_tests(&suite_set, false); + kunit_exec_list_tests(&filtered_set, false); else if (!strcmp(action, "list_attr")) - kunit_exec_list_tests(&suite_set, true); + kunit_exec_list_tests(&filtered_set, true); else pr_err("kunit: unknown action '%s'\n", action); }