Differential D27401 Diff 80706 sys/net/route/route_tables.c

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sys/net/route/route_tables.c

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	* Grows up the number of routing tables in the current fib.			* Grows up the number of routing tables in the current fib.
	* Function creates new index array for all rtables and allocates			* Function creates new index array for all rtables and allocates
	* remaining routing tables.			* remaining routing tables.
	*/			*/
	static void			static void
	grow_rtables(uint32_t num_tables)			grow_rtables(uint32_t num_tables)
	{			{
	struct domain *dom;			struct domain *dom;
	struct rib_head **prnh;			struct rib_head *prnh, rh;
	struct rib_head new_rt_tables, old_rt_tables;			struct rib_head new_rt_tables, old_rt_tables;
	int family;			int family;

	RTABLES_LOCK_ASSERT();			RTABLES_LOCK_ASSERT();

	KASSERT(num_tables >= V_rt_numfibs, ("num_tables(%u) < rt_numfibs(%u)\n",			KASSERT(num_tables >= V_rt_numfibs, ("num_tables(%u) < rt_numfibs(%u)\n",
	num_tables, V_rt_numfibs));			num_tables, V_rt_numfibs));

	new_rt_tables = mallocarray(num_tables * (AF_MAX + 1), sizeof(void *),			new_rt_tables = mallocarray(num_tables * (AF_MAX + 1), sizeof(void *),
	M_RTABLE, M_WAITOK \| M_ZERO);			M_RTABLE, M_WAITOK \| M_ZERO);

	if ((num_tables > 1) && (V_rt_add_addr_allfibs == 0))			if ((num_tables > 1) && (V_rt_add_addr_allfibs == 0))
	printf("WARNING: Adding ifaddrs to all fibs has been turned off "			printf("WARNING: Adding ifaddrs to all fibs has been turned off "
	"by default. Consider tuning %s if needed\n",			"by default. Consider tuning %s if needed\n",
	"net.add_addr_allfibs");			"net.add_addr_allfibs");

				fib_grow_rtables(num_tables);

	/*			/*
	* Current rt_tables layout:			* Current rt_tables layout:
	* fib0[af0, af1, af2, .., AF_MAX]fib1[af0, af1, af2, .., Af_MAX]..			* fib0[af0, af1, af2, .., AF_MAX]fib1[af0, af1, af2, .., Af_MAX]..
	* this allows to copy existing tables data by using memcpy()			* this allows to copy existing tables data by using memcpy()
	*/			*/
	if (V_rt_tables != NULL)			if (V_rt_tables != NULL)
	memcpy(new_rt_tables, V_rt_tables,			memcpy(new_rt_tables, V_rt_tables,
	V_rt_numfibs * (AF_MAX + 1) * sizeof(void *));			V_rt_numfibs * (AF_MAX + 1) * sizeof(void *));

	/* Populate the remainders */			/* Populate the remainders */
	for (dom = domains; dom; dom = dom->dom_next) {			for (dom = domains; dom; dom = dom->dom_next) {
	if (dom->dom_rtattach == NULL)			if (dom->dom_rtattach == NULL)
	continue;			continue;
	family = dom->dom_family;			family = dom->dom_family;
	for (int i = 0; i < num_tables; i++) {			for (int i = 0; i < num_tables; i++) {
	prnh = &new_rt_tables[i * (AF_MAX + 1) + family];			prnh = &new_rt_tables[i * (AF_MAX + 1) + family];
	if (*prnh != NULL)			if (*prnh != NULL)
	continue;			continue;
	*prnh = dom->dom_rtattach(i);			rh = dom->dom_rtattach(i);
	if (*prnh == NULL)			if (rh == NULL)
	log(LOG_ERR, "unable to create routing tables for domain %d\n",			log(LOG_ERR, "unable to create routing table for %d.%d\n",
	dom->dom_family);			dom->dom_family, i);
				if (fib_select_algo_initial(rh) != 0) {
				log(LOG_ERR, "unable to select algo for table %d.%d\n",
				dom->dom_family, i);
				// TODO: detach table
				}
				*prnh = rh;
	}			}
	}			}

	/*			/*
	* Update rtables pointer.			* Update rtables pointer.
	* Ensure all writes to new_rt_tables has been completed before			* Ensure all writes to new_rt_tables has been completed before
	* switching pointer.			* switching pointer.
	*/			*/
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