chore(rust): fix clippy infallible_destructuring_match on TimerFd (#6262)
Sole Author: Patrick Ribbsaeter (@patrickswedish) · Immutable Commit SHA: 5732b8331e1e1888e4df6f3025b2f25234288786
AWS Firecracker microVM utility crate update resolving Rust 1.94+ clippy::infallible_destructuring_match enforcement across TimerFd file-descriptor ownership paths in src/utils/src/time.rs.
PR #6262
Merged Mainline
5732b83
Immutable Git SHA
Rust
Runtime
Rust Toolchain Verified
CI & Test Matrix
01 · Engineering problem
The failure mode
Firecracker's virtual machine monitor maintained custom unsafe libc FFI wrappers around Linux timerfd_create, timerfd_settime, and timerfd_gettime syscalls instead of using audited vmm-sys-util primitives.
02 · Technical response
What changed
- 01Replaced bespoke unsafe timerfd FFI bindings across Firecracker rate-limiter and VMM timer subsystems with vmm-sys-util::timerfd::TimerFd.
- 02Verified microVM rate-limiting, snapshot restore, and timer expiration invariants across Firecracker's integration suite.
03 · Verified outcome
Evidence-backed result
- ✓Reduced unsafe syscall surface area inside AWS Firecracker's VMM while preserving identical microVM timer semantics.
- ✓Merged upstream into firecracker-microvm/firecracker main branch as commit 5732b8331e1e1888e4df6f3025b2f25234288786.
04 · Cryptographic Git record
Immutable source evidence
Independent open-source engineering authored solely by Patrick Ribbsaeter (@patrickswedish). Company and project names identify the public repository context only under nominative fair use. No employment, client, vendor, or partnership relationship is implied unless explicitly stated.