minimize ssl lock by youknowone · Pull Request #6376 · RustPython/RustPython
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📒 Files selected for processing (1)
crates/stdlib/src/ssl.rs(7 hunks)
Walkthrough
The PR refactors SSL socket certificate and CRL loading logic in crates/stdlib/src/ssl.rs to reduce lock contention. Argument parsing and certificate validation occur before lock acquisition, heavy parsing operations are moved outside critical sections, and CRL handling is separated from root store mutations.
Changes
| Cohort / File(s) | Summary |
|---|---|
SSL lock contention reduction crates/stdlib/src/ssl.rs |
Reordered argument parsing for SSL loading paths to occur before acquiring locks. Moved X509 certificate parsing outside critical sections. Separated CRL handling from root/store mutations. Refactored SNI accessors, get_peercert, cipher/version methods, and session tracking to minimize lock hold duration and avoid nested locks. Preserved existing error propagation and exception handling. |
Estimated code review effort
🎯 4 (Complex) | ⏱️ ~60 minutes
- Lock correctness and deadlock prevention: Verify that moving operations outside locks doesn't introduce data races or deadlocks, particularly around SNI state cloning and nested lock avoidance
- Certificate/CRL parsing correctness: Ensure pre-validation and deferred mutation of root_store/ca_certs_der don't break certificate chain validation or CRL verification
- get_peercert refactoring: Confirm peer certificate extraction outside locks maintains consistency and compatibility with existing return types
- Error handling paths: Validate that errno preservation and SSL error conversion to PySSLError-derived objects work correctly across all modified code paths
Possibly related PRs
- PySSLCertificate #6219: Introduces cert::PySSLCertificate and modifies getpeercert to return Certificate objects; overlaps with this PR's refactoring of get_peercert certificate extraction outside locks
- Fix SSL deferred error #6371: Adjusts lock/handshake/deferred-certificate handling in ssl.rs; related to reducing lock hold time and deferring certificate error checks
- ssl module for windows #6332: Modifies certificate/CRL loading logic including load_verify_locations and load_default_certs paths; directly related to CRL and certificate loading changes in this PR
Suggested reviewers
- ShaharNaveh
- coolreader18
- arihant2math
Poem
🐰 Locks held too long cause threads to wait,
So parse before you seal the gate!
CRLs dance freely, certs unbound,
Less contention all around! 🔐✨
Pre-merge checks and finishing touches
✅ Passed checks (3 passed)
| Check name | Status | Explanation |
|---|---|---|
| Description Check | ✅ Passed | Check skipped - CodeRabbit’s high-level summary is enabled. |
| Title check | ✅ Passed | The title 'minimize ssl lock' directly and specifically summarizes the main objective of the changeset: reducing lock contention in SSL handling by restructuring argument parsing and TLS operations to minimize the duration locks are held. |
| Docstring Coverage | ✅ Passed | Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. |
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