/**
 * Call a callback for each child class of a qdisc
 * @arg qdisc		the parent qdisc
 * @arg cache		a class cache including all classes of the interface
 *                      the specified qdisc is attached to
 * @arg cb              callback function
 * @arg arg             argument to be passed to callback function
 */
void rtnl_qdisc_foreach_child(struct rtnl_qdisc *qdisc, struct nl_cache *cache,
			      void (*cb)(struct nl_object *, void *), void *arg)
{
	struct rtnl_class *filter;
	
	filter = rtnl_class_alloc();
	if (!filter)
		return;

	rtnl_class_set_parent(filter, qdisc->q_handle);
	rtnl_class_set_ifindex(filter, qdisc->q_ifindex);
	rtnl_class_set_kind(filter, qdisc->q_kind);

	nl_cache_foreach_filter(cache, (struct nl_object *) filter, cb, arg);

	rtnl_class_put(filter);
}
예제 #2
0
TError TNlClass::Create(const TNl &nl) {
    struct rtnl_class *cls;
    TError error;
    int ret;

    cls = rtnl_class_alloc();
    if (!cls)
        return TError(EError::Unknown, "Cannot allocate rtnl_class object");

    rtnl_tc_set_ifindex(TC_CAST(cls), Index);
    rtnl_tc_set_parent(TC_CAST(cls), Parent);
    rtnl_tc_set_handle(TC_CAST(cls), Handle);

    ret = rtnl_tc_set_kind(TC_CAST(cls), Kind.c_str());
    if (ret < 0) {
        error = nl.Error(ret, "Cannot set class kind");
        goto free_class;
    }

    if (Kind == "htb") {
        /* must be <= INT32_MAX to prevent overflows in libnl */
        uint64_t maxRate = INT32_MAX;

        /*
         * HTB doesn't allow 0 rate
         * FIXME add support for 64-bit rates
         */
        rtnl_htb_set_rate(cls, std::min(Rate ?: 1, maxRate));
        rtnl_htb_set_ceil(cls, std::min(Ceil ?: maxRate, maxRate));
        rtnl_htb_set_prio(cls, Prio);

        if (MTU)
            rtnl_tc_set_mtu(TC_CAST(cls), MTU);

        if (Quantum)
            rtnl_htb_set_quantum(cls, Quantum);

        if (RateBurst)
            rtnl_htb_set_rbuffer(cls, RateBurst);

        if (CeilBurst)
            rtnl_htb_set_cbuffer(cls, CeilBurst);
    }
예제 #3
0
파일: in_netlink.c 프로젝트: onlyjob/bmon
static void handle_class(struct nl_object *obj, void *arg)
{
	struct rtnl_tc *tc = (struct rtnl_tc *) obj;
	struct element *e;
	struct rdata *rdata = arg;
	struct rdata ndata = {
		.level = rdata->level + 1,
	};

	if (!(e = handle_tc_obj(tc, "class", rdata)))
		return;

	ndata.parent = e;

	if (!strcmp(rtnl_tc_get_kind(tc), "htb"))
		element_set_txmax(e, rtnl_htb_get_rate((struct rtnl_class *) tc));

	find_classes(rtnl_tc_get_handle(tc), &ndata);
	find_qdiscs(rtnl_tc_get_handle(tc), &ndata);
}

static void find_qdiscs(uint32_t parent, struct rdata *rdata)
{
	struct rtnl_qdisc *filter;

	if (!(filter = rtnl_qdisc_alloc()))
		return;

	rtnl_tc_set_parent((struct rtnl_tc *) filter, parent);

	nl_cache_foreach_filter(qdisc_cache, OBJ_CAST(filter),
				handle_qdisc, rdata);

	rtnl_qdisc_put(filter);
}

static void find_cls(int ifindex, uint32_t parent, struct rdata *rdata)
{
	struct nl_cache *cls_cache;

	if (rtnl_cls_alloc_cache(sock, ifindex, parent, &cls_cache) < 0)
		return;

	nl_cache_foreach(cls_cache, handle_cls, rdata);

	nl_cache_free(cls_cache);
}

static void find_classes(uint32_t parent, struct rdata *rdata)
{
	struct rtnl_class *filter;

	if (!(filter = rtnl_class_alloc()))
		return;

	rtnl_tc_set_parent((struct rtnl_tc *) filter, parent);

	nl_cache_foreach_filter(class_cache, OBJ_CAST(filter),
				handle_class, rdata);

	rtnl_class_put(filter);
}

static void handle_qdisc(struct nl_object *obj, void *arg)
{
	struct rtnl_tc *tc = (struct rtnl_tc *) obj;
	struct element *e;
	struct rdata *rdata = arg;
	struct rdata ndata = {
		.level = rdata->level + 1,
	};

	if (!(e = handle_tc_obj(tc, "qdisc", rdata)))
		return;

	ndata.parent = e;

	find_cls(rtnl_tc_get_ifindex(tc), rtnl_tc_get_handle(tc), &ndata);

	if (rtnl_tc_get_parent(tc) == TC_H_ROOT) {
		find_cls(rtnl_tc_get_ifindex(tc), TC_H_ROOT, &ndata);
		find_classes(TC_H_ROOT, &ndata);
	}

	find_classes(rtnl_tc_get_handle(tc), &ndata);
}

static void handle_tc(struct element *e, struct rtnl_link *link)
{
	struct rtnl_qdisc *qdisc;
	int ifindex = rtnl_link_get_ifindex(link);
	struct rdata rdata = {
		.level = 1,
		.parent = e,
	};

	if (rtnl_class_alloc_cache(sock, ifindex, &class_cache) < 0)
		return;

	qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, TC_H_ROOT);
	if (qdisc) {
		handle_qdisc(OBJ_CAST(qdisc), &rdata);
		rtnl_qdisc_put(qdisc);
	}

	qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, 0);
	if (qdisc) {
		handle_qdisc(OBJ_CAST(qdisc), &rdata);
		rtnl_qdisc_put(qdisc);
	}

	qdisc = rtnl_qdisc_get_by_parent(qdisc_cache, ifindex, TC_H_INGRESS);
	if (qdisc) {
		handle_qdisc(OBJ_CAST(qdisc), &rdata);
		rtnl_qdisc_put(qdisc);
	}

	nl_cache_free(class_cache);
}

static void update_link_infos(struct element *e, struct rtnl_link *link)
{
	char buf[64];

	snprintf(buf, sizeof(buf), "%u", rtnl_link_get_mtu(link));
	element_update_info(e, "MTU", buf);

	rtnl_link_flags2str(rtnl_link_get_flags(link), buf, sizeof(buf));
	element_update_info(e, "Flags", buf);

	rtnl_link_operstate2str(rtnl_link_get_operstate(link),
				buf, sizeof(buf));
	element_update_info(e, "Operstate", buf);

	snprintf(buf, sizeof(buf), "%u", rtnl_link_get_ifindex(link));
	element_update_info(e, "IfIndex", buf);

	nl_addr2str(rtnl_link_get_addr(link), buf, sizeof(buf));
	element_update_info(e, "Address", buf);

	nl_addr2str(rtnl_link_get_broadcast(link), buf, sizeof(buf));
	element_update_info(e, "Broadcast", buf);

	rtnl_link_mode2str(rtnl_link_get_linkmode(link),
			   buf, sizeof(buf));
	element_update_info(e, "Mode", buf);

	snprintf(buf, sizeof(buf), "%u", rtnl_link_get_txqlen(link));
	element_update_info(e, "TXQlen", buf);

	nl_af2str(rtnl_link_get_family(link), buf, sizeof(buf));
	element_update_info(e, "Family", buf);

	element_update_info(e, "Alias",
		rtnl_link_get_ifalias(link) ? : "");

	element_update_info(e, "Qdisc",
		rtnl_link_get_qdisc(link) ? : "");

	if (rtnl_link_get_link(link)) {
		snprintf(buf, sizeof(buf), "%u", rtnl_link_get_link(link));
		element_update_info(e, "SlaveOfIndex", buf);
	}
}

static void do_link(struct nl_object *obj, void *arg)
{
	struct rtnl_link *link = (struct rtnl_link *) obj;
	struct element *e, *e_parent = NULL;
	int i, master_ifindex;

	if (!cfg_show_all && !(rtnl_link_get_flags(link) & IFF_UP)) {
		/* FIXME: delete element */
		return;
	}

	/* Check if the interface is a slave of another interface */
	if ((master_ifindex = rtnl_link_get_link(link))) {
		char parent[IFNAMSIZ+1];

		rtnl_link_i2name(link_cache, master_ifindex,
				 parent, sizeof(parent));

		e_parent = element_lookup(grp, parent, master_ifindex, NULL, 0);
	}

	if (!(e = element_lookup(grp, rtnl_link_get_name(link),
				 rtnl_link_get_ifindex(link), e_parent, ELEMENT_CREAT)))
		return;

	if (e->e_flags & ELEMENT_FLAG_CREATED) {
		if (e->e_parent)
			e->e_level = e->e_parent->e_level + 1;

		if (element_set_key_attr(e, "bytes", "packets") ||
		    element_set_usage_attr(e, "bytes"))
			BUG();

		/* FIXME: Update link infos every 1s or so */
		update_link_infos(e, link);

		e->e_flags &= ~ELEMENT_FLAG_CREATED;
	}

	for (i = 0; i < ARRAY_SIZE(link_attrs); i++) {
		struct attr_map *m = &link_attrs[i];
		uint64_t c_rx = 0, c_tx = 0;
		int flags = 0;

		if (m->rxid >= 0) {
			c_rx = rtnl_link_get_stat(link, m->rxid);
			flags |= UPDATE_FLAG_RX;
		}

		if (m->txid >= 0) {
			c_tx = rtnl_link_get_stat(link, m->txid);
			flags |= UPDATE_FLAG_TX;
		}

		attr_update(e, m->attrid, c_rx, c_tx, flags);
	}

	if (!c_notc)
		handle_tc(e, link);

	element_notify_update(e, NULL);
	element_lifesign(e, 1);
}

static void netlink_read(void)
{
	int err;

	if ((err = nl_cache_resync(sock, link_cache, NULL, NULL)) < 0) {
		fprintf(stderr, "Unable to resync link cache: %s\n", nl_geterror(err));
		goto disable;
	}

	if ((err = nl_cache_resync(sock, qdisc_cache, NULL, NULL)) < 0) {
		fprintf(stderr, "Unable to resync qdisc cache: %s\n", nl_geterror(err));
		goto disable;
	}

	nl_cache_foreach(link_cache, do_link, NULL);

	return;

disable:
	netlink_ops.m_flags &= ~BMON_MODULE_ENABLED;
}

static void netlink_shutdown(void)
{
	nl_cache_free(link_cache);
	nl_cache_free(qdisc_cache);
	nl_socket_free(sock);
}