C++ (Cpp) disc_timeout_jiff Examples

Example #1

/**
 * mesh_path_start_discovery - launch a path discovery from the PREQ queue
 *
 * @sdata: local mesh subif
 */
void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	struct mesh_preq_queue *preq_node;
	struct mesh_path *mpath;
	u8 ttl, dst_flags;
	u32 lifetime;

	spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
	if (!ifmsh->preq_queue_len ||
		time_before(jiffies, ifmsh->last_preq +
				min_preq_int_jiff(sdata))) {
		spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
		return;
	}

	preq_node = list_first_entry(&ifmsh->preq_queue.list,
			struct mesh_preq_queue, list);
	list_del(&preq_node->list);
	--ifmsh->preq_queue_len;
	spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);

	rcu_read_lock();
	mpath = mesh_path_lookup(preq_node->dst, sdata);
	if (!mpath)
		goto enddiscovery;

	spin_lock_bh(&mpath->state_lock);
	if (preq_node->flags & PREQ_Q_F_START) {
		if (mpath->flags & MESH_PATH_RESOLVING) {
			spin_unlock_bh(&mpath->state_lock);
			goto enddiscovery;
		} else {
			mpath->flags &= ~MESH_PATH_RESOLVED;
			mpath->flags |= MESH_PATH_RESOLVING;
			mpath->discovery_retries = 0;
			mpath->discovery_timeout = disc_timeout_jiff(sdata);
		}
	} else if (!(mpath->flags & MESH_PATH_RESOLVING) ||
			mpath->flags & MESH_PATH_RESOLVED) {
		mpath->flags &= ~MESH_PATH_RESOLVING;
		spin_unlock_bh(&mpath->state_lock);
		goto enddiscovery;
	}

	ifmsh->last_preq = jiffies;

	if (time_after(jiffies, ifmsh->last_dsn_update +
				net_traversal_jiffies(sdata)) ||
	    time_before(jiffies, ifmsh->last_dsn_update)) {
		++ifmsh->dsn;
		sdata->u.mesh.last_dsn_update = jiffies;
	}
	lifetime = default_lifetime(sdata);
	ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
	if (ttl == 0) {
		sdata->u.mesh.mshstats.dropped_frames_ttl++;
		spin_unlock_bh(&mpath->state_lock);
		goto enddiscovery;
	}

	if (preq_node->flags & PREQ_Q_F_REFRESH)
		dst_flags = MP_F_DO;
	else
		dst_flags = MP_F_RF;

	spin_unlock_bh(&mpath->state_lock);
	mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr,
			cpu_to_le32(ifmsh->dsn), dst_flags, mpath->dst,
			cpu_to_le32(mpath->dsn), sdata->dev->broadcast, 0,
			ttl, cpu_to_le32(lifetime), 0,
			cpu_to_le32(ifmsh->preq_id++), sdata);
	mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);

enddiscovery:
	rcu_read_unlock();
	kfree(preq_node);
}

Example #2

File: mesh_hwmp.c Project: mdamt/linux

/**
 * mesh_path_start_discovery - launch a path discovery from the PREQ queue
 *
 * @sdata: local mesh subif
 */
void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	struct mesh_preq_queue *preq_node;
	struct mesh_path *mpath;
	u8 ttl, target_flags = 0;
	const u8 *da;
	u32 lifetime;

	spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
	if (!ifmsh->preq_queue_len ||
		time_before(jiffies, ifmsh->last_preq +
				min_preq_int_jiff(sdata))) {
		spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
		return;
	}

	preq_node = list_first_entry(&ifmsh->preq_queue.list,
			struct mesh_preq_queue, list);
	list_del(&preq_node->list);
	--ifmsh->preq_queue_len;
	spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);

	rcu_read_lock();
	mpath = mesh_path_lookup(sdata, preq_node->dst);
	if (!mpath)
		goto enddiscovery;

	spin_lock_bh(&mpath->state_lock);
	if (mpath->flags & (MESH_PATH_DELETED | MESH_PATH_FIXED)) {
		spin_unlock_bh(&mpath->state_lock);
		goto enddiscovery;
	}
	mpath->flags &= ~MESH_PATH_REQ_QUEUED;
	if (preq_node->flags & PREQ_Q_F_START) {
		if (mpath->flags & MESH_PATH_RESOLVING) {
			spin_unlock_bh(&mpath->state_lock);
			goto enddiscovery;
		} else {
			mpath->flags &= ~MESH_PATH_RESOLVED;
			mpath->flags |= MESH_PATH_RESOLVING;
			mpath->discovery_retries = 0;
			mpath->discovery_timeout = disc_timeout_jiff(sdata);
		}
	} else if (!(mpath->flags & MESH_PATH_RESOLVING) ||
			mpath->flags & MESH_PATH_RESOLVED) {
		mpath->flags &= ~MESH_PATH_RESOLVING;
		spin_unlock_bh(&mpath->state_lock);
		goto enddiscovery;
	}

	ifmsh->last_preq = jiffies;

	if (time_after(jiffies, ifmsh->last_sn_update +
				net_traversal_jiffies(sdata)) ||
	    time_before(jiffies, ifmsh->last_sn_update)) {
		++ifmsh->sn;
		sdata->u.mesh.last_sn_update = jiffies;
	}
	lifetime = default_lifetime(sdata);
	ttl = sdata->u.mesh.mshcfg.element_ttl;
	if (ttl == 0) {
		sdata->u.mesh.mshstats.dropped_frames_ttl++;
		spin_unlock_bh(&mpath->state_lock);
		goto enddiscovery;
	}

	if (preq_node->flags & PREQ_Q_F_REFRESH)
		target_flags |= IEEE80211_PREQ_TO_FLAG;
	else
		target_flags &= ~IEEE80211_PREQ_TO_FLAG;

	spin_unlock_bh(&mpath->state_lock);
	da = (mpath->is_root) ? mpath->rann_snd_addr : broadcast_addr;
	mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->vif.addr, ifmsh->sn,
			       target_flags, mpath->dst, mpath->sn, da, 0,
			       ttl, lifetime, 0, ifmsh->preq_id++, sdata);
	mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);

enddiscovery:
	rcu_read_unlock();
	kfree(preq_node);
}