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@ShadowCurse ShadowCurse commented Oct 7, 2025

Changes

  • remove remaining anyhow usage
  • remove unused code from MmioDeviceManager
  • assert on device downcasting
  • remove SharedDeviceType wrapper

Reason

Codebase maintenance

License Acceptance

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  • I have described what is done in these changes, why they are needed, and
    how they are solving the problem in a clear and encompassing way.
  • I have updated any relevant documentation (both in code and in the docs)
    in the PR.
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  • This functionality cannot be added in rust-vmm.

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codecov bot commented Oct 7, 2025

Codecov Report

❌ Patch coverage is 44.68085% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.85%. Comparing base (ae7b046) to head (a7bb686).

Files with missing lines Patch % Lines
src/vmm/src/lib.rs 0.00% 22 Missing ⚠️
src/vmm/src/device_manager/mod.rs 20.00% 4 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##             main    #5471      +/-   ##
==========================================
+ Coverage   82.79%   82.85%   +0.06%     
==========================================
  Files         263      263              
  Lines       27218    27174      -44     
==========================================
- Hits        22535    22516      -19     
+ Misses       4683     4658      -25     
Flag Coverage Δ
5.10-m5n.metal 83.05% <44.68%> (+0.08%) ⬆️
5.10-m6a.metal 82.29% <44.68%> (+0.07%) ⬆️
5.10-m6g.metal 79.64% <44.68%> (+0.05%) ⬆️
5.10-m6i.metal 83.04% <44.68%> (+0.06%) ⬆️
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5.10-m7i.metal-24xl 83.02% <44.68%> (+0.07%) ⬆️
5.10-m7i.metal-48xl 83.02% <44.68%> (+0.07%) ⬆️
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5.10-m8g.metal-48xl 79.64% <44.68%> (+0.06%) ⬆️
6.1-m5n.metal 83.08% <44.68%> (?)
6.1-m6a.metal 82.33% <44.68%> (+0.06%) ⬆️
6.1-m6g.metal 79.64% <44.68%> (+0.06%) ⬆️
6.1-m6i.metal 83.07% <44.68%> (+0.07%) ⬆️
6.1-m7a.metal-48xl 82.32% <44.68%> (+0.07%) ⬆️
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6.1-m8g.metal-24xl 79.64% <44.68%> (+0.07%) ⬆️
6.1-m8g.metal-48xl 79.64% <44.68%> (+0.06%) ⬆️

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@ShadowCurse ShadowCurse force-pushed the maintenance_2 branch 3 times, most recently from b96e570 to 1a23a98 Compare October 13, 2025 08:48
The only place where anyhow was used is in the device manager
code that runs a specified function with a certain device. No instead
of converting the possible error of that function to anyhow::error,
just return the error and lest the call site do deal with it.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>
When we get a type erased device from a underlying
device storage we expect that it will always be of the type we
requested with T::const_device_type(). If it is not true, we
have an internal bug.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>
with_virtio_device_with_id was never used in the
mmio device manager.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>
Replace 2 functions: `try_with_virtio_device_with_id`
and `with_virtio_device_with_id`, with single
`with_virtio_device` that handles any return type of the
passed function.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>
This wrapper was only used in the `update_from_restored_device`
function which was instantly unwrapping the value and
just adding device to the VmResources. Instead of this
round trip just add devices directly since fields are
public.
This also removes the check for the addition of balloon device,
but this check is not needed anyway, since snapshot should not
contain conflicting configs.

Signed-off-by: Egor Lazarchuk <yegorlz@amazon.co.uk>
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