mirror of
https://github.com/openvswitch/ovs
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e6ef6cc634
This commit adds a thread that periodically removes expired connections. The expiration time of a connection can be expressed by: expiration = now + timeout For each possible 'timeout' value (there aren't many) we keep a list. When the expiration is updated, we move the connection to the back of the corresponding 'timeout' list. This ways, the list is always ordered by 'expiration'. When the cleanup thread iterates through the lists for expired connections, it can stop at the first non expired connection. Suggested-by: Joe Stringer <joe@ovn.org> Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com> Acked-by: Joe Stringer <joe@ovn.org>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/*
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* Copyright (c) 2015, 2016 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "conntrack-private.h"
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#include "dp-packet.h"
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enum other_state {
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OTHERS_FIRST,
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OTHERS_MULTIPLE,
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OTHERS_BIDIR,
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};
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struct conn_other {
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struct conn up;
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enum other_state state;
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};
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static const enum ct_timeout other_timeouts[] = {
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[OTHERS_FIRST] = CT_TM_OTHER_FIRST,
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[OTHERS_MULTIPLE] = CT_TM_OTHER_MULTIPLE,
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[OTHERS_BIDIR] = CT_TM_OTHER_BIDIR,
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};
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static struct conn_other *
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conn_other_cast(const struct conn *conn)
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{
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return CONTAINER_OF(conn, struct conn_other, up);
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}
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static enum ct_update_res
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other_conn_update(struct conn *conn_, struct conntrack_bucket *ctb,
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struct dp_packet *pkt OVS_UNUSED, bool reply, long long now)
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{
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struct conn_other *conn = conn_other_cast(conn_);
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if (reply && conn->state != OTHERS_BIDIR) {
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conn->state = OTHERS_BIDIR;
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} else if (conn->state == OTHERS_FIRST) {
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conn->state = OTHERS_MULTIPLE;
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}
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conn_update_expiration(ctb, &conn->up, other_timeouts[conn->state], now);
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return CT_UPDATE_VALID;
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}
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static bool
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other_valid_new(struct dp_packet *pkt OVS_UNUSED)
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{
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return true;
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}
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static struct conn *
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other_new_conn(struct conntrack_bucket *ctb, struct dp_packet *pkt OVS_UNUSED,
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long long now)
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{
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struct conn_other *conn;
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conn = xzalloc(sizeof *conn);
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conn->state = OTHERS_FIRST;
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conn_init_expiration(ctb, &conn->up, other_timeouts[conn->state], now);
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return &conn->up;
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}
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struct ct_l4_proto ct_proto_other = {
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.new_conn = other_new_conn,
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.valid_new = other_valid_new,
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.conn_update = other_conn_update,
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};
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