Address two code review suggestions:
1. **Fix buffer reuse in ReadFilerConfFromFilers**:
- Use local []byte data instead of shared buffer
- Prevents partial data from failed attempts affecting successful reads
- Creates fresh buffer inside callback for masterClient path
- More robust to future changes in read helpers
2. **Improve lock safety in FilerClient**:
- Add *WithHealth variants that accept health pointer
- Get health pointer while holding lock, then release before calling
- Eliminates potential for lock confusion (though no actual deadlock existed)
- Clearer separation: lock for data access, atomics for health ops
Changes:
- ReadFilerConfFromFilers: var data []byte, create buf inside callback
- shouldSkipUnhealthyFilerWithHealth(health *filerHealth)
- recordFilerSuccessWithHealth(health *filerHealth)
- recordFilerFailureWithHealth(health *filerHealth)
- Keep old functions for backward compatibility (marked deprecated)
- Update LookupVolumeIds to use WithHealth variants
Benefits:
- More robust multi-filer configuration reading
- Clearer lock vs atomic operation boundaries
- No lock held during health checks (even though atomics don't block)
- Better code organization and maintainability
Chris Lu
1ce9826c36