LSM: Split LSM preparation from initialization (d8e9bbd4) · Commits · 戴 / test

security/security.c

+15 −6

Original line number	Diff line number	Diff line
		@@ -139,22 +139,28 @@ static bool __init lsm_allowed(struct lsm_info *lsm)
		return true;
		}

		/* Check if LSM should be initialized. */
		static void __init maybe_initialize_lsm(struct lsm_info *lsm)
		/* Prepare LSM for initialization. */
		static void __init prepare_lsm(struct lsm_info *lsm)
		{
		int enabled = lsm_allowed(lsm);

		/* Record enablement (to handle any following exclusive LSMs). */
		set_enabled(lsm, enabled);

		/* If selected, initialize the LSM. */
		/* If enabled, do pre-initialization work. */
		if (enabled) {
		int ret;

		if ((lsm->flags & LSM_FLAG_EXCLUSIVE) && !exclusive) {
		exclusive = lsm;
		init_debug("exclusive chosen: %s\n", lsm->name);
		}
		}
		}

		/* Initialize a given LSM, if it is enabled. */
		static void __init initialize_lsm(struct lsm_info *lsm)
		{
		if (is_enabled(lsm)) {
		int ret;

		init_debug("initializing %s\n", lsm->name);
		ret = lsm->init();
		@@ -240,7 +246,10 @@ static void __init ordered_lsm_init(void)
		ordered_lsm_parse(builtin_lsm_order, "builtin");

		for (lsm = ordered_lsms; *lsm; lsm++)
		maybe_initialize_lsm(*lsm);
		prepare_lsm(*lsm);

		for (lsm = ordered_lsms; *lsm; lsm++)
		initialize_lsm(*lsm);

		kfree(ordered_lsms);
		}