Function nhgrp_dump_sysctl

freebsd/net/route/nhgrp_ctl.c:792–824

}

int
nhgrp_dump_sysctl(struct rib_head *rh, struct sysctl_req *w)
{
	struct nh_control *ctl = rh->nh_control;
	struct epoch_tracker et;
	struct nhgrp_priv *nhg_priv;
	char *buffer;
	size_t sz;
	int error = 0;

	if (ctl->gr_head.items_count == 0)
		return (0);

	/* Calculate the maximum nhop group size in bytes */
	sz = sizeof(struct rt_msghdr) + sizeof(struct nhgrp_external);
	sz += 2 * sizeof(struct nhgrp_container);
	sz += 2 * sizeof(struct nhgrp_nhop_external) * RIB_MAX_MPATH_WIDTH;
	buffer = malloc(sz, M_TEMP, M_WAITOK);

	NET_EPOCH_ENTER(et);
	NHOPS_RLOCK(ctl);
	CHT_SLIST_FOREACH(&ctl->gr_head, mpath, nhg_priv) {
		error = dump_nhgrp_entry(rh, nhg_priv, buffer, sz, w);
		if (error != 0)
			break;
	} CHT_SLIST_FOREACH_END;
	NHOPS_RUNLOCK(ctl);
	NET_EPOCH_EXIT(et);

	free(buffer, M_TEMP);

	return (error);
}