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migration: simplify notifiers

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Pass the callback function to add_migration_state_change_notifier so
that migration can initialize the notifier on add and clear it on
delete, which simplifies the call sites.  Shorten the function names
so the extra arg can be added more legibly.  Hide the global notifier
list in a new function migration_call_notifiers, and make it externally
visible so future live update code can call it.

No functional change.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Tested-by: Michael Galaxy <mgalaxy@akamai.com>
Reviewed-by: Michael Galaxy <mgalaxy@akamai.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <1686148954-250144-1-git-send-email-steven.sistare@oracle.com>
This commit is contained in:
Steve Sistare
2023-06-07 07:42:34 -07:00
committed by Juan Quintela
parent 2c36076a11
commit d9cda21303
6 changed files with 31 additions and 19 deletions
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6
hw/net/virtio-net.c
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@ -3624,8 +3624,8 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
n->primary_listener.hide_device = failover_hide_primary_device;
qatomic_set(&n->failover_primary_hidden, true);
device_listener_register(&n->primary_listener);
n->migration_state.notify = virtio_net_migration_state_notifier;
add_migration_state_change_notifier(&n->migration_state);
migration_add_notifier(&n->migration_state,
virtio_net_migration_state_notifier);
n->host_features |= (1ULL << VIRTIO_NET_F_STANDBY);
}
@ -3788,7 +3788,7 @@ static void virtio_net_device_unrealize(DeviceState *dev)
if (n->failover) {
qobject_unref(n->primary_opts);
device_listener_unregister(&n->primary_listener);
remove_migration_state_change_notifier(&n->migration_state);
migration_remove_notifier(&n->migration_state);
} else {
assert(n->primary_opts == NULL);
}