Differential D26449 Diff 77809 head/sys/net/route/nhop.c

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head/sys/net/route/nhop.c

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* NHF_DEFAULT		* NHF_DEFAULT
*		*
* All nexthops are stored in the resizable hash table.		* All nexthops are stored in the resizable hash table.
* Additionally, each nexthop gets assigned its unique index (nexthop index)		* Additionally, each nexthop gets assigned its unique index (nexthop index)
* so userland programs can interact with the nexthops easier. Index allocation		* so userland programs can interact with the nexthops easier. Index allocation
* is backed by the bitmask array.		* is backed by the bitmask array.
*/		*/

static MALLOC_DEFINE(M_NHOP, "nhops", "nexthops data");		MALLOC_DEFINE(M_NHOP, "nhops", "nexthops data");

/* Hash management functions */		/* Hash management functions */

int		int
nhops_init_rib(struct rib_head *rh)		nhops_init_rib(struct rib_head *rh)
{		{
struct nh_control *ctl;		struct nh_control *ctl;
size_t alloc_size;		size_t alloc_size;
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static void		static void
destroy_ctl(struct nh_control *ctl)		destroy_ctl(struct nh_control *ctl)
{		{

NHOPS_LOCK_DESTROY(ctl);		NHOPS_LOCK_DESTROY(ctl);
free(ctl->nh_head.ptr, M_NHOP);		free(ctl->nh_head.ptr, M_NHOP);
free(ctl->nh_idx_head.idx, M_NHOP);		free(ctl->nh_idx_head.idx, M_NHOP);
		#ifdef ROUTE_MPATH
		nhgrp_ctl_free(ctl);
		#endif
free(ctl, M_NHOP);		free(ctl, M_NHOP);
}		}

/*		/*
* Epoch callback indicating ctl is safe to destroy		* Epoch callback indicating ctl is safe to destroy
*/		*/
static void		static void
destroy_ctl_epoch(epoch_context_t ctx)		destroy_ctl_epoch(epoch_context_t ctx)
Show All 26 Lines	nhops_destroy_rib(struct rib_head *rh)
* details.		* details.
*/		*/

NHOPS_WLOCK(ctl);		NHOPS_WLOCK(ctl);
CHT_SLIST_FOREACH(&ctl->nh_head, nhops, nh_priv) {		CHT_SLIST_FOREACH(&ctl->nh_head, nhops, nh_priv) {
DPRINTF("Marking nhop %u unlinked", nh_priv->nh_idx);		DPRINTF("Marking nhop %u unlinked", nh_priv->nh_idx);
refcount_release(&nh_priv->nh_linked);		refcount_release(&nh_priv->nh_linked);
} CHT_SLIST_FOREACH_END;		} CHT_SLIST_FOREACH_END;
		#ifdef ROUTE_MPATH
		nhgrp_ctl_unlink_all(ctl);
		#endif
NHOPS_WUNLOCK(ctl);		NHOPS_WUNLOCK(ctl);

/*		/*
* Postpone destruction till the end of current epoch		* Postpone destruction till the end of current epoch
* so nhop_free() can safely use nh_control pointer.		* so nhop_free() can safely use nh_control pointer.
*/		*/
epoch_call(net_epoch_preempt, destroy_ctl_epoch,		epoch_call(net_epoch_preempt, destroy_ctl_epoch,
&ctl->ctl_epoch_ctx);		&ctl->ctl_epoch_ctx);
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