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vm-virtio: Provide a way to clone a Queue

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Since the QueueState structure has been updated by not implementing
Clone anymore, we need a way to keep cloning the Queue.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2022-05-12 15:26:44 +02:00
parent 1651253777
commit c622b43f85
1 changed files with 24 additions and 1 deletions
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25
vm-virtio/src/lib.rs
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@ -12,8 +12,10 @@
use std::fmt::{self, Debug};
use std::sync::Arc;
use virtio_queue::Queue;
use vm_memory::{bitmap::AtomicBitmap, GuestAddress, GuestMemoryAtomic};
use vm_memory::GuestAddress;
type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
pub mod queue;
pub use queue::*;
@ -121,3 +123,24 @@ impl Translatable for GuestAddress {
}
}
}
/// Helper for cloning a Queue since QueueState doesn't derive Clone
pub fn clone_queue(
queue: &Queue<GuestMemoryAtomic<GuestMemoryMmap>>,
) -> Queue<GuestMemoryAtomic<GuestMemoryMmap>> {
Queue::<GuestMemoryAtomic<GuestMemoryMmap>, virtio_queue::QueueState> {
mem: queue.mem.clone(),
state: virtio_queue::QueueState {
max_size: queue.state.max_size,
next_avail: queue.state.next_avail,
next_used: queue.state.next_used,
event_idx_enabled: queue.state.event_idx_enabled,
signalled_used: queue.state.signalled_used,
size: queue.state.size,
ready: queue.state.ready,
desc_table: queue.state.desc_table,
avail_ring: queue.state.avail_ring,
used_ring: queue.state.used_ring,
},
}
}