* Fix IAM inline user policy retrieval
* fmt
* Persist inline user policies to avoid loss on server restart
- Use s3ApiConfig.PutPolicies/GetPolicies for persistent storage instead of non-persistent global map
- Remove unused global policyDocuments map
- Update PutUserPolicy to store policies in persistent storage
- Update GetUserPolicy to read from persistent storage
- Update DeleteUserPolicy to clean up persistent storage
- Add mock IamS3ApiConfig for testing
- Improve test to verify policy statements are not merged or lost
* Fix inline policy key collision and action aggregation
* Improve error handling and optimize inline policy management
- GetUserPolicy: Propagate GetPolicies errors instead of silently falling through
- DeleteUserPolicy: Return error immediately on GetPolicies failure
- computeAggregatedActionsForUser: Add optional Policies parameter for I/O optimization
- PutUserPolicy: Reuse fetched policies to avoid redundant GetPolicies call
- Improve logging with clearer messages about best-effort aggregation
- Update test to use exact action string matching instead of substring checks
All 15 tests pass with no regressions.
* Add per-user policy index for O(1) lookup performance
- Extend Policies struct with InlinePolicies map[userName]map[policyName]
- Add getOrCreateUserPolicies() helper for safe user map management
- Update computeAggregatedActionsForUser to use direct user map access
- Update PutUserPolicy, GetUserPolicy, DeleteUserPolicy for new structure
- Performance: O(1) user lookups instead of O(all_policies) iteration
- Eliminates string prefix matching loop
- All tests pass; backward compatible with managed policies
* Fix DeleteUserPolicy to validate user existence before storage modification
Refactor DeleteUserPolicy handler to check user existence early:
- First iterate s3cfg.Identities to verify user exists
- Return NoSuchEntity error immediately if user not found
- Only then proceed with GetPolicies and policy deletion
- Capture reference to found identity for direct update
This ensures consistency: if user doesn't exist, storage is not modified.
Previously the code would delete from storage first and check identity
afterwards, potentially leaving orphaned policies.
Benefits:
- Fail-fast validation before storage operations
- No orphaned policies in storage if validation fails
- Atomic from logical perspective
- Direct identity reference eliminates redundant loop
- All error paths preserved and tested
All 15 tests pass; no functional changes to behavior.
* Fix GetUserPolicy to return NoSuchEntity when inline policy not found
When InlinePolicies[userName] exists but does not contain policyName,
the handler now immediately returns NoSuchEntity error instead of
falling through to the reconstruction logic.
Changes:
- Add else clause after userPolicies[policyName] lookup
- Return IamError(NoSuchEntityException, "policy not found") immediately
- Prevents incorrect fallback to reconstructing ident.Actions
- Ensures explicit error when policy explicitly doesn't exist
This improves error semantics:
- Policy exists in stored inline policies → return error (not reconstruct)
- Policy doesn't exist in stored inline policies → try reconstruction (backward compat)
- Storage error → return service failure error
All 15 tests pass; no behavioral changes to existing error or success paths.
