C++ (Cpp) __nl_cache_mngt_require Examples

Example #1

File: cache_mngt.c Project: BorodaZizitopa/libnl

/**
 * Demand the use of a global cache
 * @arg name		name of the required object type
 *
 * Trys to find a cache of the specified type for global
 * use.
 *
 * @return A cache provided by another subsystem of the
 *         specified type marked to be available.
 */
struct nl_cache *nl_cache_mngt_require(const char *name)
{
	struct nl_cache *cache;

	if (!(cache = __nl_cache_mngt_require(name)))
		fprintf(stderr, "Application BUG: Your application must "
			"call nl_cache_mngt_provide() and\nprovide a valid "
			"%s cache to be used for internal lookups.\nSee the "
			" API documentation for more details.\n", name);
	
	return cache;
}

Example #2

File: tc.c Project: acooks/libnl

int rtnl_tc_msg_parse(struct nlmsghdr *n, struct rtnl_tc *tc)
{
	struct nl_cache *link_cache;
	struct rtnl_tc_ops *ops;
	struct nlattr *tb[TCA_MAX + 1];
	char kind[TCKINDSIZ];
	struct tcmsg *tm;
	int err;

	tc->ce_msgtype = n->nlmsg_type;

	err = nlmsg_parse(n, sizeof(*tm), tb, TCA_MAX, tc_policy);
	if (err < 0)
		return err;

	if (tb[TCA_KIND] == NULL)
		return -NLE_MISSING_ATTR;

	nla_strlcpy(kind, tb[TCA_KIND], sizeof(kind));
	rtnl_tc_set_kind(tc, kind);

	tm = nlmsg_data(n);
	tc->tc_family  = tm->tcm_family;
	tc->tc_ifindex = tm->tcm_ifindex;
	tc->tc_handle  = tm->tcm_handle;
	tc->tc_parent  = tm->tcm_parent;
	tc->tc_info    = tm->tcm_info;

	tc->ce_mask |= (TCA_ATTR_FAMILY | TCA_ATTR_IFINDEX | TCA_ATTR_HANDLE|
		        TCA_ATTR_PARENT | TCA_ATTR_INFO);

	if (tb[TCA_OPTIONS]) {
		tc->tc_opts = nl_data_alloc_attr(tb[TCA_OPTIONS]);
		if (!tc->tc_opts)
			return -NLE_NOMEM;
		tc->ce_mask |= TCA_ATTR_OPTS;
	}

	if (tb[TCA_STATS2]) {
		struct nlattr *tbs[TCA_STATS_MAX + 1];

		err = nla_parse_nested(tbs, TCA_STATS_MAX, tb[TCA_STATS2],
				       tc_stats2_policy);
		if (err < 0)
			return err;

		if (tbs[TCA_STATS_BASIC]) {
			struct gnet_stats_basic *bs;
			
			bs = nla_data(tbs[TCA_STATS_BASIC]);
			tc->tc_stats[RTNL_TC_BYTES]	= bs->bytes;
			tc->tc_stats[RTNL_TC_PACKETS]	= bs->packets;
		}

		if (tbs[TCA_STATS_RATE_EST]) {
			struct gnet_stats_rate_est *re;

			re = nla_data(tbs[TCA_STATS_RATE_EST]);
			tc->tc_stats[RTNL_TC_RATE_BPS]	= re->bps;
			tc->tc_stats[RTNL_TC_RATE_PPS]	= re->pps;
		}
		
		if (tbs[TCA_STATS_QUEUE]) {
			struct gnet_stats_queue *q;

			q = nla_data(tbs[TCA_STATS_QUEUE]);
			tc->tc_stats[RTNL_TC_QLEN]	= q->qlen;
			tc->tc_stats[RTNL_TC_BACKLOG]	= q->backlog;
			tc->tc_stats[RTNL_TC_DROPS]	= q->drops;
			tc->tc_stats[RTNL_TC_REQUEUES]	= q->requeues;
			tc->tc_stats[RTNL_TC_OVERLIMITS]	= q->overlimits;
		}

		tc->ce_mask |= TCA_ATTR_STATS;
		
		if (tbs[TCA_STATS_APP]) {
			tc->tc_xstats = nl_data_alloc_attr(tbs[TCA_STATS_APP]);
			if (tc->tc_xstats == NULL)
				return -NLE_NOMEM;
			tc->ce_mask |= TCA_ATTR_XSTATS;
		} else
			goto compat_xstats;
	} else {
		if (tb[TCA_STATS]) {
			struct tc_stats *st = nla_data(tb[TCA_STATS]);

			tc->tc_stats[RTNL_TC_BYTES]	= st->bytes;
			tc->tc_stats[RTNL_TC_PACKETS]	= st->packets;
			tc->tc_stats[RTNL_TC_RATE_BPS]	= st->bps;
			tc->tc_stats[RTNL_TC_RATE_PPS]	= st->pps;
			tc->tc_stats[RTNL_TC_QLEN]	= st->qlen;
			tc->tc_stats[RTNL_TC_BACKLOG]	= st->backlog;
			tc->tc_stats[RTNL_TC_DROPS]	= st->drops;
			tc->tc_stats[RTNL_TC_OVERLIMITS]= st->overlimits;

			tc->ce_mask |= TCA_ATTR_STATS;
		}

compat_xstats:
		if (tb[TCA_XSTATS]) {
			tc->tc_xstats = nl_data_alloc_attr(tb[TCA_XSTATS]);
			if (tc->tc_xstats == NULL)
				return -NLE_NOMEM;
			tc->ce_mask |= TCA_ATTR_XSTATS;
		}
	}

	ops = rtnl_tc_get_ops(tc);
	if (ops && ops->to_msg_parser) {
		void *data = rtnl_tc_data(tc);

		if (!data)
			return -NLE_NOMEM;

		err = ops->to_msg_parser(tc, data);
		if (err < 0)
			return err;
	}

	if ((link_cache = __nl_cache_mngt_require("route/link"))) {
		struct rtnl_link *link;

		if ((link = rtnl_link_get(link_cache, tc->tc_ifindex))) {
			rtnl_tc_set_link(tc, link);

			/* rtnl_tc_set_link incs refcnt */
			rtnl_link_put(link);
		}
	}

	return 0;
}