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Sometimes interface updates could happen in a way ifnotifier is not able to catch. For example some heavy operations (device reset) in netdev-dpdk could require re-applying of the bridge configuration. For this purpose new manual notifier introduced. Its function 'if_notifier_manual_report()' could be called directly by the code that aware about changes. This new notifier is thread-safe. Signed-off-by: Ilya Maximets <i.maximets@ovn.org> Acked-by: Eelco Chaudron <echaudro@redhat.com>
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
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* Copyright (c) 2019 Ilya Maximets <i.maximets@ovn.org>.
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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 "openvswitch/compiler.h"
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#include "openvswitch/thread.h"
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#include "openvswitch/util.h"
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#include "if-notifier.h"
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/* Implementation of a manual interface notifier.
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*
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* Intended for catching interface events that could not be tracked by
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* OS specific interface notifiers, e.g. iface updates in netdev-dpdk.
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* For that purpose 'if_notifier_manual_report()' should be called directly
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* by the code that aware of interface changes.
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*
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* Thread-safety
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* =============
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* This notifier is thread-safe in terms of calling its functions from
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* different thread contexts, however if the callback passed to
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* 'if_notifier_manual_set_cb' is used by some other code (i.e. by OS
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* specific notifiers) it must be thread-safe itself.
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*/
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static struct ovs_mutex manual_notifier_mutex = OVS_MUTEX_INITIALIZER;
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static if_notify_func *notify OVS_GUARDED_BY(manual_notifier_mutex) = NULL;
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void
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if_notifier_manual_set_cb(if_notify_func *cb)
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{
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ovs_mutex_lock(&manual_notifier_mutex);
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notify = cb;
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ovs_mutex_unlock(&manual_notifier_mutex);
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}
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void
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if_notifier_manual_report(void)
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{
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ovs_mutex_lock(&manual_notifier_mutex);
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if (notify) {
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notify(NULL);
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}
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ovs_mutex_unlock(&manual_notifier_mutex);
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}
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