static noreturn int test_dependencies(const struct test *t)
{
struct kmod_ctx *ctx;
struct kmod_module *mod = NULL;
struct kmod_list *list, *l;
int err;
size_t len = 0;
int fooa = 0, foob = 0, fooc = 0;
ctx = kmod_new(NULL, NULL);
if (ctx == NULL)
exit(EXIT_FAILURE);
err = kmod_module_new_from_name(ctx, "mod-foo", &mod);
if (err < 0 || mod == NULL) {
kmod_unref(ctx);
exit(EXIT_FAILURE);
}
list = kmod_module_get_dependencies(mod);
kmod_list_foreach(l, list) {
struct kmod_module *m = kmod_module_get_module(l);
const char *name = kmod_module_get_name(m);
if (streq(name, "mod_foo_a"))
fooa = 1;
if (streq(name, "mod_foo_b"))
foob = 1;
else if (streq(name, "mod_foo_c"))
fooc = 1;
fprintf(stderr, "name=%s", name);
kmod_module_unref(m);
len++;
}
/* fooa, foob, fooc */
if (len != 3 || !fooa || !foob || !fooc)
exit(EXIT_FAILURE);
kmod_module_unref_list(list);
kmod_module_unref(mod);
kmod_unref(ctx);
exit(EXIT_SUCCESS);
}
/**
* @attention 本注释得到了"核高基"科技重大专项2012年课题
* “开源操作系统内核分析和安全性评估
* （课题编号：2012ZX01039-004）”的资助。
*
* @copyright 注释添加单位：清华大学——03任务
* （Linux内核相关通用基础软件包分析）
*
* @author 注释添加人员： 李明
* (电子邮件 <*****@*****.**>)
*
* @date 注释添加日期： 2013-6-1
*
* @note 注释详细内容:
*
* @brief 测试模块的 kmod_module_get_dependencies 是否工作正确
* 其中需要调用到 libkmod 模块中的以下接口
* - kmod_new()
* - kmod_module_new_from_name()
* - kmod_module_get_dependencies()
* - kmod_list_foreach()
* - kmod_module_get_module()
* - kmod_module_get_name()
* - kmod_module_unref_list()
* - kmod_module_unref()
* - kmod_unref()
*/
static int test_dependencies(const struct test *t)
{
struct kmod_ctx *ctx;
struct kmod_module *mod;
struct kmod_list *list, *l;
int err;
size_t len = 0;
int crc16 = 0, mbcache = 0, jbd2 = 0;
ctx = kmod_new(NULL, NULL);
if (ctx == NULL)
return EXIT_FAILURE;
err = kmod_module_new_from_name(ctx, "ext4", &mod);
if (err < 0) {
kmod_unref(ctx);
return EXIT_FAILURE;
}
list = kmod_module_get_dependencies(mod);
kmod_list_foreach(l, list) {
struct kmod_module *m = kmod_module_get_module(l);
const char *name = kmod_module_get_name(m);
if (strcmp(name, "crc16") == 0)
crc16 = 1;
if (strcmp(name, "mbcache") == 0)
mbcache = 1;
else if (strcmp(name, "jbd2") == 0)
jbd2 = 1;
kmod_module_unref(m);
len++;
}
/* crc16, mbcache, jbd2 */
if (len != 3 || !crc16 || !mbcache || !jbd2)
return EXIT_FAILURE;
kmod_module_unref_list(list);
kmod_module_unref(mod);
kmod_unref(ctx);
return EXIT_SUCCESS;
}
static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies)
{
const char *modname = kmod_module_get_name(mod);
struct kmod_list *pre = NULL, *post = NULL;
const char *cmd = NULL;
int err;
if (!ignore_commands) {
err = kmod_module_get_softdeps(mod, &pre, &post);
if (err < 0) {
WRN("could not get softdeps of '%s': %s\n",
modname, strerror(-err));
return err;
}
cmd = kmod_module_get_remove_commands(mod);
}
if (cmd == NULL && !ignore_loaded) {
int state = kmod_module_get_initstate(mod);
if (state < 0) {
LOG ("Module %s not found.\n", modname);
err = -ENOENT;
goto error;
} else if (state == KMOD_MODULE_BUILTIN) {
LOG("Module %s is builtin.\n", modname);
err = -ENOENT;
goto error;
} else if (state != KMOD_MODULE_LIVE) {
if (first_time) {
LOG("Module %s is not in kernel.\n", modname);
err = -ENOENT;
goto error;
} else {
err = 0;
goto error;
}
}
}
rmmod_do_deps_list(post, false);
if (do_dependencies && remove_dependencies) {
struct kmod_list *deps = kmod_module_get_dependencies(mod);
err = rmmod_do_deps_list(deps, true);
if (err < 0)
goto error;
}
if (!ignore_loaded) {
int usage = kmod_module_get_refcnt(mod);
if (usage > 0) {
if (!quiet_inuse)
LOG("Module %s is in use.\n", modname);
err = -EBUSY;
goto error;
}
}
if (cmd == NULL)
err = rmmod_do_remove_module(mod);
else
err = command_do(mod, "remove", cmd, NULL);
if (err < 0)
goto error;
rmmod_do_deps_list(pre, false);
error:
kmod_module_unref_list(pre);
kmod_module_unref_list(post);
return err;
}
