chrislu
2 weeks ago
4 changed files with 297 additions and 11 deletions
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49weed/util/log_buffer/log_buffer.go
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229weed/util/log_buffer/log_buffer_corruption_test.go
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18weed/util/log_buffer/log_read.go
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12weed/util/log_buffer/sealed_buffer.go
@ -0,0 +1,229 @@ |
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package log_buffer |
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import ( |
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"errors" |
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"testing" |
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"time" |
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"google.golang.org/protobuf/proto" |
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" |
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"github.com/seaweedfs/seaweedfs/weed/util" |
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) |
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// TestReadTsCorruptedBuffer tests that readTs properly returns an error for corrupted data
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func TestReadTsCorruptedBuffer(t *testing.T) { |
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// Create a corrupted buffer with invalid protobuf data
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buf := make([]byte, 100) |
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// Set size field to 10 bytes
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buf[0] = 10 // size = 10 (little endian, but simplified for test)
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buf[1] = 0 |
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buf[2] = 0 |
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buf[3] = 0 |
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// Fill with garbage data that won't unmarshal as LogEntry
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for i := 4; i < 14; i++ { |
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buf[i] = 0xFF |
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} |
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// Attempt to read timestamp
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size, ts, err := readTs(buf, 0) |
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// Should return an error
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if err == nil { |
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t.Error("Expected error for corrupted buffer, got nil") |
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} |
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// Size and ts should be zero on error
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if size != 0 { |
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t.Errorf("Expected size=0 on error, got %d", size) |
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} |
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if ts != 0 { |
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t.Errorf("Expected ts=0 on error, got %d", ts) |
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} |
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// Error should indicate corruption
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if !errors.Is(err, ErrBufferCorrupted) { |
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t.Logf("Error message: %v", err) |
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// Check if error message contains expected text
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if err.Error() == "" || len(err.Error()) == 0 { |
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t.Error("Expected non-empty error message") |
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} |
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} |
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t.Logf("✓ readTs correctly returned error for corrupted buffer: %v", err) |
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} |
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// TestReadTsValidBuffer tests that readTs works correctly for valid data
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func TestReadTsValidBuffer(t *testing.T) { |
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// Create a valid LogEntry
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logEntry := &filer_pb.LogEntry{ |
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TsNs: 123456789, |
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Key: []byte("test-key"), |
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} |
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// Marshal it
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data, err := proto.Marshal(logEntry) |
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if err != nil { |
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t.Fatalf("Failed to marshal LogEntry: %v", err) |
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} |
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// Create buffer with size prefix using util function
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buf := make([]byte, 4+len(data)) |
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util.Uint32toBytes(buf[0:4], uint32(len(data))) |
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copy(buf[4:], data) |
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// Read timestamp
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size, ts, err := readTs(buf, 0) |
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// Should succeed
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if err != nil { |
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t.Fatalf("Expected no error for valid buffer, got: %v", err) |
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} |
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// Should return correct values
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if size != len(data) { |
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t.Errorf("Expected size=%d, got %d", len(data), size) |
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} |
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if ts != logEntry.TsNs { |
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t.Errorf("Expected ts=%d, got %d", logEntry.TsNs, ts) |
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} |
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t.Logf("✓ readTs correctly parsed valid buffer: size=%d, ts=%d", size, ts) |
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} |
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// TestReadFromBufferCorruption tests that ReadFromBuffer propagates corruption errors
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func TestReadFromBufferCorruption(t *testing.T) { |
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lb := NewLogBuffer("test-corruption", time.Second, nil, nil, func() {}) |
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// Add a valid entry first using AddDataToBuffer
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validKey := []byte("valid") |
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validData, _ := proto.Marshal(&filer_pb.LogEntry{ |
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TsNs: 1000, |
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Key: validKey, |
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}) |
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lb.AddDataToBuffer(validKey, validData, 1000) |
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// Manually corrupt the buffer by writing garbage
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// This simulates a corruption scenario
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if len(lb.idx) > 0 { |
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pos := lb.idx[0] |
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// Overwrite the protobuf data with garbage
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for i := pos + 4; i < pos+8 && i < len(lb.buf); i++ { |
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lb.buf[i] = 0xFF |
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} |
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} |
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// Try to read - should detect corruption
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startPos := MessagePosition{Time: lb.startTime} |
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buf, offset, err := lb.ReadFromBuffer(startPos) |
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// Should return corruption error
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if err == nil { |
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t.Error("Expected corruption error, got nil") |
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if buf != nil { |
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t.Logf("Unexpected success: got buffer with %d bytes", buf.Len()) |
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} |
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} else { |
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// Verify it's a corruption error
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if !errors.Is(err, ErrBufferCorrupted) { |
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t.Logf("Got error (not ErrBufferCorrupted sentinel, but still an error): %v", err) |
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} |
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t.Logf("✓ ReadFromBuffer correctly detected corruption: %v", err) |
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} |
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t.Logf("ReadFromBuffer result: buf=%v, offset=%d, err=%v", buf != nil, offset, err) |
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} |
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// TestLocateByTsCorruption tests that locateByTs propagates corruption errors
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func TestLocateByTsCorruption(t *testing.T) { |
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// Create a MemBuffer with corrupted data
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mb := &MemBuffer{ |
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buf: make([]byte, 100), |
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size: 14, |
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} |
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// Set size field
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mb.buf[0] = 10 |
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mb.buf[1] = 0 |
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mb.buf[2] = 0 |
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mb.buf[3] = 0 |
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// Fill with garbage
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for i := 4; i < 14; i++ { |
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mb.buf[i] = 0xFF |
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} |
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// Try to locate by timestamp
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pos, err := mb.locateByTs(mb.startTime) |
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// Should return error
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if err == nil { |
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t.Errorf("Expected corruption error, got nil (pos=%d)", pos) |
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} else { |
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t.Logf("✓ locateByTs correctly detected corruption: %v", err) |
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} |
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} |
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// TestErrorPropagationChain tests the complete error propagation from readTs -> locateByTs -> ReadFromBuffer
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func TestErrorPropagationChain(t *testing.T) { |
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t.Run("Corruption in readTs", func(t *testing.T) { |
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// Already covered by TestReadTsCorruptedBuffer
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t.Log("✓ readTs error propagation tested") |
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}) |
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t.Run("Corruption in locateByTs", func(t *testing.T) { |
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// Already covered by TestLocateByTsCorruption
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t.Log("✓ locateByTs error propagation tested") |
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}) |
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t.Run("Corruption in ReadFromBuffer binary search", func(t *testing.T) { |
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// Already covered by TestReadFromBufferCorruption
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t.Log("✓ ReadFromBuffer error propagation tested") |
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}) |
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t.Log("✓ Complete error propagation chain verified") |
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} |
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// TestNoSilentCorruption verifies that corruption never returns (0, 0) silently
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func TestNoSilentCorruption(t *testing.T) { |
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// Create various corrupted buffers
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testCases := []struct { |
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name string |
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buf []byte |
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pos int |
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}{ |
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{ |
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name: "Invalid protobuf", |
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buf: []byte{10, 0, 0, 0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, |
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pos: 0, |
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}, |
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{ |
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name: "Truncated data", |
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buf: []byte{100, 0, 0, 0, 1, 2, 3}, // Size says 100 but only 3 bytes available
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pos: 0, |
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}, |
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} |
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for _, tc := range testCases { |
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t.Run(tc.name, func(t *testing.T) { |
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size, ts, err := readTs(tc.buf, tc.pos) |
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// CRITICAL: Must return error, never silent (0, 0)
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if err == nil { |
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t.Errorf("CRITICAL: readTs returned (%d, %d, nil) for corrupted buffer - this causes silent data corruption!", size, ts) |
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} else { |
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t.Logf("✓ Correctly returned error instead of silent (0, 0): %v", err) |
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} |
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// On error, size and ts should be 0
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if size != 0 || ts != 0 { |
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t.Errorf("On error, expected (0, 0), got (%d, %d)", size, ts) |
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} |
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}) |
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} |
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} |
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