vhost+postcopy: Register shared ufd with postcopy
Register the UFD that comes in as the response to the 'advise' method with the postcopy code. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -171,6 +171,7 @@ struct vhost_user {
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CharBackend *chr;
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int slave_fd;
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NotifierWithReturn postcopy_notifier;
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struct PostCopyFD postcopy_fd;
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};
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static bool ioeventfd_enabled(void)
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@ -796,6 +797,17 @@ out:
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return ret;
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}
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/*
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* Called back from the postcopy fault thread when a fault is received on our
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* ufd.
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* TODO: This is Linux specific
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*/
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static int vhost_user_postcopy_fault_handler(struct PostCopyFD *pcfd,
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void *ufd)
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{
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return 0;
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}
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/*
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* Called at the start of an inbound postcopy on reception of the
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* 'advise' command.
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@ -835,8 +847,14 @@ static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp)
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error_setg(errp, "%s: Failed to get ufd", __func__);
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return -1;
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}
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fcntl(ufd, F_SETFL, O_NONBLOCK);
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/* TODO: register ufd with userfault thread */
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/* register ufd with userfault thread */
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u->postcopy_fd.fd = ufd;
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u->postcopy_fd.data = dev;
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u->postcopy_fd.handler = vhost_user_postcopy_fault_handler;
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u->postcopy_fd.idstr = "vhost-user"; /* Need to find unique name */
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postcopy_register_shared_ufd(&u->postcopy_fd);
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return 0;
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}
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