Differential D27412 Diff 80864 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.
*/		*/
atomic_thread_fence_rel();		atomic_thread_fence_rel();
old_rt_tables = V_rt_tables;		old_rt_tables = V_rt_tables;
Show All 18 Lines	vnet_rtables_init(const void *unused __unused)
if (IS_DEFAULT_VNET(curvnet)) {		if (IS_DEFAULT_VNET(curvnet)) {
num_rtables_base = RT_NUMFIBS;		num_rtables_base = RT_NUMFIBS;
TUNABLE_INT_FETCH("net.fibs", &num_rtables_base);		TUNABLE_INT_FETCH("net.fibs", &num_rtables_base);
V_rt_numfibs = normalize_num_rtables(num_rtables_base);		V_rt_numfibs = normalize_num_rtables(num_rtables_base);
} else		} else
V_rt_numfibs = 1;		V_rt_numfibs = 1;

vnet_rtzone_init();		vnet_rtzone_init();
		vnet_fib_init();

RTABLES_LOCK_INIT();		RTABLES_LOCK_INIT();

RTABLES_LOCK();		RTABLES_LOCK();
grow_rtables(V_rt_numfibs);		grow_rtables(V_rt_numfibs);
RTABLES_UNLOCK();		RTABLES_UNLOCK();
}		}
VNET_SYSINIT(vnet_rtables_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,		VNET_SYSINIT(vnet_rtables_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,
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