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vhost+postcopy: Register shared ufd with postcopy

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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>
This commit is contained in:
Dr. David Alan Gilbert 2018-03-12 17:21:05 +00:00 committed by Michael S. Tsirkin
parent 00fa4fc85b
commit f82c11165f
1 changed files with 19 additions and 1 deletions
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20
hw/virtio/vhost-user.c
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@ -171,6 +171,7 @@ struct vhost_user {
CharBackend *chr;
int slave_fd;
NotifierWithReturn postcopy_notifier;
struct PostCopyFD postcopy_fd;
};
static bool ioeventfd_enabled(void)
@ -796,6 +797,17 @@ out:
return ret;
}
/*
* Called back from the postcopy fault thread when a fault is received on our
* ufd.
* TODO: This is Linux specific
*/
static int vhost_user_postcopy_fault_handler(struct PostCopyFD *pcfd,
void *ufd)
{
return 0;
}
/*
* Called at the start of an inbound postcopy on reception of the
* 'advise' command.
@ -835,8 +847,14 @@ static int vhost_user_postcopy_advise(struct vhost_dev *dev, Error **errp)
error_setg(errp, "%s: Failed to get ufd", __func__);
return -1;
}
fcntl(ufd, F_SETFL, O_NONBLOCK);
/* TODO: register ufd with userfault thread */
/* register ufd with userfault thread */
u->postcopy_fd.fd = ufd;
u->postcopy_fd.data = dev;
u->postcopy_fd.handler = vhost_user_postcopy_fault_handler;
u->postcopy_fd.idstr = "vhost-user"; /* Need to find unique name */
postcopy_register_shared_ufd(&u->postcopy_fd);
return 0;
}