feat(driver,iour): detect kernel version & fallback#903
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Pull request overview
This PR adds Linux kernel version detection for the io_uring backend and uses it to choose between multishot opcodes and fallback implementations when running on older kernels.
Changes:
- Add
KernelVersionparsing viarustix::system::uname()and anis_kernel_newer_thanhelper. - Gate
AcceptMultiandRecvMultientry creation on minimum kernel versions, falling back to non-multishot variants. - Rework
RecvMsgMultito select between an io_uring implementation and a fallback implementation at construction time.
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.
| File | Description |
|---|---|
compio-driver/src/sys/pal/iour/mod.rs |
Adds kernel version parsing + comparison helper for runtime gating. |
compio-driver/src/sys/op/multishot/iour.rs |
Uses kernel version gating for AcceptMulti opcode selection. |
compio-driver/src/sys/op/managed/iour.rs |
Uses kernel version gating for RecvMulti, and adds a RecvMsgMulti fallback path. |
compio-driver/Cargo.toml |
Enables rustix/system when the io-uring feature is on. |
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George-Miao
reviewed
May 2, 2026
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A second attempt after #837 .