296 lines
9.0 KiB
Markdown
296 lines
9.0 KiB
Markdown
# HMAC File Server 3.2 - Stability & Reliability Audit Plan
|
|
|
|
## 🎯 Objective
|
|
Comprehensive code audit focused on **STABILITY** and **RELIABILITY** without rewriting core functions. Identify potential issues that could cause crashes, data loss, memory leaks, race conditions, or degraded performance.
|
|
|
|
---
|
|
|
|
## 📋 Audit Categories
|
|
|
|
### 1. **CONCURRENCY & THREAD SAFETY** 🔄
|
|
**Priority: CRITICAL**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Mutex Usage Patterns**
|
|
- `confMutex` (main.go:332) - Global config protection
|
|
- `spilloverMutex` (queue_resilience.go:18) - Queue operations
|
|
- `healthMutex` (queue_resilience.go:40) - Health monitoring
|
|
- `logMu` (main.go:378) - Logging synchronization
|
|
|
|
#### Specific Checks:
|
|
- [ ] **Lock Ordering** - Prevent deadlocks between multiple mutexes
|
|
- [ ] **Lock Duration** - Ensure locks aren't held too long
|
|
- [ ] **Read vs Write Locks** - Verify appropriate RWMutex usage
|
|
- [ ] **Defer Patterns** - Check all `defer mutex.Unlock()` calls
|
|
- [ ] **Channel Operations** - Network event channels, upload queues
|
|
- [ ] **Goroutine Lifecycle** - Worker pools, monitoring routines
|
|
|
|
#### Files to Audit:
|
|
- `main.go` (lines around 300, 332, 378, 822)
|
|
- `queue_resilience.go` (mutex operations throughout)
|
|
- `network_resilience.go` (concurrent monitoring)
|
|
- `upload_session.go` (session management)
|
|
|
|
---
|
|
|
|
### 2. **ERROR HANDLING & RECOVERY** ⚠️
|
|
**Priority: HIGH**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Fatal Error Conditions** - Review all `log.Fatal*` calls
|
|
- [ ] **Panic Recovery** - Missing recover() handlers
|
|
- [ ] **Error Propagation** - Proper error bubbling up
|
|
- [ ] **Resource Cleanup** - Ensure cleanup on errors
|
|
- [ ] **Graceful Degradation** - Fallback mechanisms
|
|
|
|
#### Critical Fatal Points:
|
|
- `main.go:572` - Config creation failure
|
|
- `main.go:577` - Configuration load failure
|
|
- `main.go:585` - Validation failure
|
|
- `main.go:625` - Configuration errors
|
|
- `main.go:680` - PID file errors
|
|
- `helpers.go:97` - MinFreeBytes parsing
|
|
- `helpers.go:117` - TTL configuration
|
|
|
|
#### Error Patterns to Check:
|
|
- [ ] Database connection failures
|
|
- [ ] File system errors (disk full, permissions)
|
|
- [ ] Network timeouts and failures
|
|
- [ ] Memory allocation failures
|
|
- [ ] Configuration reload errors
|
|
|
|
---
|
|
|
|
### 3. **RESOURCE MANAGEMENT** 💾
|
|
**Priority: HIGH**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **File Handle Management**
|
|
- Verify all `defer file.Close()` calls
|
|
- Check for file handle leaks
|
|
- Monitor temp file cleanup
|
|
|
|
- [ ] **Memory Management**
|
|
- Buffer pool usage (`bufferPool` in main.go:363)
|
|
- Large file upload handling
|
|
- Memory leak patterns in long-running operations
|
|
|
|
- [ ] **Network Connections**
|
|
- HTTP connection pooling
|
|
- Client session tracking
|
|
- Connection timeout handling
|
|
|
|
- [ ] **Goroutine Management**
|
|
- Worker pool lifecycle
|
|
- Background task cleanup
|
|
- WaitGroup usage patterns
|
|
|
|
#### Files to Focus:
|
|
- `main.go` (buffer pools, file operations)
|
|
- `helpers.go` (file operations, defer patterns)
|
|
- `upload_session.go` (session cleanup)
|
|
- `adaptive_io.go` (large file handling)
|
|
|
|
---
|
|
|
|
### 4. **CONFIGURATION & INITIALIZATION** ⚙️
|
|
**Priority: MEDIUM**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Default Values** - Ensure safe defaults
|
|
- [ ] **Validation Logic** - Prevent invalid configurations
|
|
- [ ] **Runtime Reconfiguration** - Hot reload safety
|
|
- [ ] **Missing Required Fields** - Graceful handling
|
|
- [ ] **Type Safety** - String to numeric conversions
|
|
|
|
#### Configuration Files:
|
|
- `config_simplified.go` - Default generation
|
|
- `config_validator.go` - Validation rules
|
|
- `config_test_scenarios.go` - Edge cases
|
|
|
|
#### Validation Points:
|
|
- Network timeouts and limits
|
|
- File size restrictions
|
|
- Path validation and sanitization
|
|
- Security parameter validation
|
|
|
|
---
|
|
|
|
### 5. **NETWORK RESILIENCE STABILITY** 🌐
|
|
**Priority: HIGH** (Recently added features)
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Network Monitoring Loops** - Prevent infinite loops
|
|
- [ ] **Interface Detection** - Handle missing interfaces gracefully
|
|
- [ ] **Quality Metrics** - Prevent division by zero
|
|
- [ ] **State Transitions** - Ensure atomic state changes
|
|
- [ ] **Timer Management** - Prevent timer leaks
|
|
|
|
#### Files to Audit:
|
|
- `network_resilience.go` - Core network monitoring
|
|
- `client_network_handler.go` - Client session tracking
|
|
- `integration.go` - System integration points
|
|
|
|
#### Specific Concerns:
|
|
- Network interface enumeration failures
|
|
- RTT measurement edge cases
|
|
- Quality threshold calculations
|
|
- Predictive switching logic
|
|
|
|
---
|
|
|
|
### 6. **UPLOAD PROCESSING STABILITY** 📤
|
|
**Priority: HIGH**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Chunked Upload Sessions** - Session state consistency
|
|
- [ ] **File Assembly** - Partial upload handling
|
|
- [ ] **Temporary File Management** - Cleanup on failures
|
|
- [ ] **Concurrent Uploads** - Rate limiting effectiveness
|
|
- [ ] **Storage Quota Enforcement** - Disk space checks
|
|
|
|
#### Files to Audit:
|
|
- `chunked_upload_handler.go` - Session management
|
|
- `upload_session.go` - State tracking
|
|
- `main.go` - Core upload logic
|
|
- `helpers.go` - File operations
|
|
|
|
#### Edge Cases:
|
|
- Disk full during upload
|
|
- Network interruption mid-upload
|
|
- Client disconnect scenarios
|
|
- Large file timeout handling
|
|
|
|
---
|
|
|
|
### 7. **LOGGING & MONITORING RELIABILITY** 📊
|
|
**Priority: MEDIUM**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Log File Rotation** - Prevent disk space issues
|
|
- [ ] **Metrics Collection** - Avoid blocking operations
|
|
- [ ] **Debug Logging** - Performance impact in production
|
|
- [ ] **Log Level Changes** - Runtime safety
|
|
- [ ] **Structured Logging** - Consistency and safety
|
|
|
|
#### Files to Audit:
|
|
- `helpers.go` (logging setup)
|
|
- `main.go` (debug statements)
|
|
- Metrics initialization and collection
|
|
|
|
---
|
|
|
|
### 8. **EXTERNAL DEPENDENCIES** 🔗
|
|
**Priority: MEDIUM**
|
|
|
|
#### Areas to Check:
|
|
- [ ] **Database Connections** - Connection pooling and timeouts
|
|
- [ ] **Redis Integration** - Failure handling
|
|
- [ ] **File System Operations** - Permission and space checks
|
|
- [ ] **System Calls** - Error handling
|
|
- [ ] **Third-party Libraries** - Version compatibility
|
|
|
|
---
|
|
|
|
## 🔍 Audit Methodology
|
|
|
|
### Phase 1: **Static Code Analysis** (2-3 hours)
|
|
1. **Concurrency Pattern Review** - Mutex usage, race conditions
|
|
2. **Error Handling Audit** - Fatal conditions, recovery patterns
|
|
3. **Resource Leak Detection** - File handles, memory, goroutines
|
|
4. **Configuration Safety** - Validation and defaults
|
|
|
|
### Phase 2: **Dynamic Analysis Preparation** (1-2 hours)
|
|
1. **Test Scenario Design** - Edge cases and failure modes
|
|
2. **Monitoring Setup** - Memory, CPU, file handles
|
|
3. **Load Testing Preparation** - Concurrent upload scenarios
|
|
4. **Network Failure Simulation** - Interface switching tests
|
|
|
|
### Phase 3: **Code Pattern Verification** (2-3 hours)
|
|
1. **TODO/FIXME Review** - Incomplete implementations
|
|
2. **Debug Code Cleanup** - Production-ready logging
|
|
3. **Performance Bottleneck Analysis** - Blocking operations
|
|
4. **Security Pattern Review** - Input validation, path traversal
|
|
|
|
---
|
|
|
|
## 🚨 High-Risk Areas Identified
|
|
|
|
### 1. **Multiple Fatal Conditions** (main.go)
|
|
- Configuration failures cause immediate exit
|
|
- No graceful degradation for non-critical failures
|
|
|
|
### 2. **Complex Mutex Hierarchies** (queue_resilience.go)
|
|
- Multiple mutexes could create deadlock scenarios
|
|
- Lock duration analysis needed
|
|
|
|
### 3. **Network Monitoring Loops** (network_resilience.go)
|
|
- Background goroutines with complex state management
|
|
- Timer and resource cleanup verification needed
|
|
|
|
### 4. **File Handle Management** (throughout)
|
|
- Multiple file operations without centralized tracking
|
|
- Temp file cleanup verification needed
|
|
|
|
### 5. **Buffer Pool Usage** (main.go)
|
|
- Memory management in high-concurrency scenarios
|
|
- Pool exhaustion handling
|
|
|
|
---
|
|
|
|
## 📈 Success Criteria
|
|
|
|
### ✅ **Stability Improvements**
|
|
- No race conditions detected
|
|
- Proper resource cleanup verified
|
|
- Graceful error handling confirmed
|
|
- Memory leak prevention validated
|
|
|
|
### ✅ **Reliability Enhancements**
|
|
- Fault tolerance for external dependencies
|
|
- Robust configuration validation
|
|
- Comprehensive error recovery
|
|
- Production-ready logging
|
|
|
|
### ✅ **Performance Assurance**
|
|
- No blocking operations in critical paths
|
|
- Efficient resource utilization
|
|
- Proper cleanup and garbage collection
|
|
- Scalable concurrency patterns
|
|
|
|
---
|
|
|
|
## 🔧 Tools and Techniques
|
|
|
|
1. **Static Analysis**
|
|
- `go vet` - Built-in Go analyzer
|
|
- `golangci-lint` - Comprehensive linting
|
|
- Manual code review with focus areas
|
|
|
|
2. **Race Detection**
|
|
- `go build -race` - Runtime race detector
|
|
- Concurrent test scenarios
|
|
|
|
3. **Memory Analysis**
|
|
- `go tool pprof` - Memory profiling
|
|
- Long-running stability tests
|
|
|
|
4. **Resource Monitoring**
|
|
- File handle tracking
|
|
- Goroutine leak detection
|
|
- Network connection monitoring
|
|
|
|
---
|
|
|
|
## 📝 Deliverables
|
|
|
|
1. **Stability Audit Report** - Detailed findings and recommendations
|
|
2. **Code Improvement Patches** - Non-invasive fixes for identified issues
|
|
3. **Test Suite Enhancements** - Edge case and failure mode tests
|
|
4. **Production Monitoring Guide** - Key metrics and alerts
|
|
5. **Deployment Safety Checklist** - Pre-deployment verification steps
|
|
|
|
---
|
|
|
|
*This audit plan prioritizes stability and reliability while respecting the core architecture and avoiding rewrites of essential functions.*
|