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migration: Teach QEMUFile to be QIOChannel-aware

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migration uses QIOChannel typed qemufiles.  In follow up patches, we'll need
the capability to identify this fact, so that we can get the backing QIOChannel
from a QEMUFile.

We can also define types for QEMUFile but so far since we only need to be able
to identify QIOChannel, introduce a boolean which is simpler.

Introduce another helper qemu_file_get_ioc() to return the ioc backend of a
qemufile if has_ioc is set.

No functional change.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210722175841.938739-5-peterx@redhat.com>
Reviewed-by: Lukas Straub <lukasstraub2@web.de>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Peter Xu 2021-07-22 13:58:40 -04:00 • committed by Dr. David Alan Gilbert
parent 18711405b5
commit c6ad5be7ae
5 changed files with 24 additions and 7 deletions
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4
migration/qemu-file-channel.c
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@ -187,11 +187,11 @@ static const QEMUFileOps channel_output_ops = {
QEMUFile *qemu_fopen_channel_input(QIOChannel *ioc)
{
object_ref(OBJECT(ioc));
return qemu_fopen_ops(ioc, &channel_input_ops);
return qemu_fopen_ops(ioc, &channel_input_ops, true);
}
QEMUFile *qemu_fopen_channel_output(QIOChannel *ioc)
{
object_ref(OBJECT(ioc));
return qemu_fopen_ops(ioc, &channel_output_ops);
return qemu_fopen_ops(ioc, &channel_output_ops, true);
}