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@ShadowCurse ShadowCurse commented Oct 7, 2025

Changes

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

Reason

Codebase maintenance

License Acceptance

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PR Checklist

  • I have read and understand CONTRIBUTING.md.
  • I have run tools/devtool checkbuild --all to verify that the PR passes
    build checks on all supported architectures.
  • I have run tools/devtool checkstyle to verify that the PR passes the
    automated style checks.
  • 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.
  • I have mentioned all user-facing changes in CHANGELOG.md.
  • If a specific issue led to this PR, this PR closes the issue.
  • When making API changes, I have followed the
    Runbook for Firecracker API changes.
  • I have tested all new and changed functionalities in unit tests and/or
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  • I have linked an issue to every new TODO.

  • This functionality cannot be added in rust-vmm.

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codecov bot commented Oct 7, 2025

Codecov Report

❌ Patch coverage is 3.70370% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.86%. Comparing base (eb05db9) to head (e4dd0b4).

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%   82.86%   +0.07%     
==========================================
  Files         263      263              
  Lines       27223    27198      -25     
==========================================
- Hits        22538    22537       -1     
+ Misses       4685     4661      -24     
Flag Coverage Δ
5.10-m5n.metal 83.05% <3.70%> (+0.08%) ⬆️
5.10-m6a.metal 82.31% <3.70%> (+0.09%) ⬆️
5.10-m6g.metal 79.66% <3.70%> (+0.08%) ⬆️
5.10-m6i.metal 83.06% <3.70%> (+0.09%) ⬆️
5.10-m7a.metal-48xl 82.30% <3.70%> (+0.08%) ⬆️
5.10-m7g.metal 79.65% <3.70%> (+0.08%) ⬆️
5.10-m7i.metal-24xl 83.02% <3.70%> (+0.08%) ⬆️
5.10-m7i.metal-48xl 83.02% <3.70%> (+0.08%) ⬆️
5.10-m8g.metal-24xl 79.65% <3.70%> (+0.08%) ⬆️
5.10-m8g.metal-48xl 79.65% <3.70%> (+0.08%) ⬆️
6.1-m5n.metal 83.08% <3.70%> (+0.08%) ⬆️
6.1-m6a.metal 82.33% <3.70%> (+0.08%) ⬆️
6.1-m6g.metal 79.65% <3.70%> (+0.08%) ⬆️
6.1-m6i.metal 83.07% <3.70%> (+0.08%) ⬆️
6.1-m7a.metal-48xl 82.33% <3.70%> (+0.08%) ⬆️
6.1-m7g.metal 79.65% <3.70%> (+0.08%) ⬆️
6.1-m7i.metal-24xl 83.09% <3.70%> (+0.08%) ⬆️
6.1-m7i.metal-48xl 83.09% <3.70%> (+0.08%) ⬆️
6.1-m8g.metal-24xl 79.64% <3.70%> (+0.07%) ⬆️
6.1-m8g.metal-48xl 79.65% <3.70%> (+0.08%) ⬆️

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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 <[email protected]>
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 <[email protected]>
with_virtio_device_with_id was never used in the
mmio device manager.

Signed-off-by: Egor Lazarchuk <[email protected]>
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 <[email protected]>
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