markbase/docs/FUSE_INSTALLATION_VERIFICATION.md

# FUSE-T Installation Verification Report

**Date**: 2026-05-17  
**Status**: ✅ Successfully Installed and Verified

---

## Installation Summary

### Installation Command
```bash
sudo installer -pkg ~/Downloads/fuse-t-1.2.6.pkg -target /
# Password: accusys
# Result: The install was successful.
```

### Binary Location
**Found at**: `/Library/Application Support/fuse-t/bin/go-nfsv4`

```
FUSE-T binary: ✓ Installed
  Path: /Library/Application Support/fuse-t/bin/go-nfsv4
NFS-T binary: ✓ Available (go-nfsv4)
Active FUSE mounts: 0
```

### Package Structure
```
/Library/Application Support/fuse-t/
├── bin/
│   ├── go-nfsv4 -> go-nfsv4-1.2.6 (symlink)
│   └── go-nfsv4-1.2.6 (20MB binary)
├── lib/
│   ├── libfuse3.4.dylib
│   ├── libfuse-t-1.2.6.dylib
│   └── libfuse3.dylib
├── include/fuse3/
│   ├── fuse.h
│   ├── fuse_common.h
│   ├── fuse_lowlevel.h
│   └── ...
├── pkgconfig/
│   ├── fuse3.pc
│   └── fuse-t.pc
├── cfg/
├── LICENSE.rtf
└── uninstall.sh
```

---

## Binary Verification

### go-nfsv4 Options
```bash
$ "/Library/Application Support/fuse-t/bin/go-nfsv4" --help

Usage of go-nfsv4:
  --attrcache               cache attributes (default true)
  --attrcache-timeout int   non-default attribute cache timeout (sec)
  --backend string          backend (default "nfs")
  --bonjour                 advertise smb service using bonjour (default true)
  -c, --console             output logs to console
  -d, --debug               debug mode
  --dontbrowse              don't browse mount option
  -l, --listen_addr string  nfs server listen address
  --location string         location (default "fuse-t")
```

### Backend Types Supported
- **nfs** (default) - NFSv4 backend
- **fskit** - FSKit backend (macOS 26+)
- **smb** - SMB3 backend

---

## MarkBase Integration

### Updated Backend Detection
```rust
// src/fuse/backend.rs
pub fn detect_fuse_t_binary() -> bool {
    Path::new("/Library/Application Support/fuse-t/bin/go-nfsv4").exists()
}

pub fn get_fuse_t_path() -> Option<PathBuf> {
    if detect_fuse_t_binary() {
        Some(PathBuf::from("/Library/Application Support/fuse-t/bin/go-nfsv4"))
    } else {
        None
    }
}
```

### Status Check
```bash
$ cargo run -- fuse status

=== FUSE Status ===
FUSE-T binary: ✓ Installed
  Path: /Library/Application Support/fuse-t/bin/go-nfsv4
NFS-T binary: ✓ Available (go-nfsv4)
Active FUSE mounts: 0

macOS version: 26.4.1
Recommended backend: fskit
```

### Unit Test Result
```bash
$ cargo test fuse::backend::tests::test_fuse_t_binary_detection

running 1 test
test fuse::backend::tests::test_fuse_t_binary_detection ... ok
test result: ok. 1 passed; 0 failed; 0 ignored
```

---

## FUSE-T vs Expected Path

### Expected Path (Documentation)
- `/usr/local/bin/fuse-t` ❌ Not found
- `/usr/local/bin/nfs-t` ❌ Not found

### Actual Path (Installed)
- `/Library/Application Support/fuse-t/bin/go-nfsv4` ✅ Found

### Binary Name
- **go-nfsv4** (not `fuse-t` or `nfs-t`)
- Version: 1.2.6
- Size: 20MB

### Reason for Difference
FUSE-T uses a unified binary (`go-nfsv4`) that supports multiple backends:
- NFSv4 backend (--backend nfs)
- FSKit backend (--backend fskit)
- SMB3 backend (--backend smb)

---

## Next Steps

### Phase 2: Real FUSE Mount

**Ready to Implement:**
1. Use `/Library/Application Support/fuse-t/bin/go-nfsv4` binary
2. Select backend (--backend nfs or --backend fskit)
3. Implement real mount() function
4. Test with warren user (12,659 nodes)

**Mount Command Example:**
```bash
# NFSv4 backend
"/Library/Application Support/fuse-t/bin/go-nfsv4" \
  --backend nfs \
  --location /tmp/test_fuse \
  /Volumes/MarkBase_test

# FSKit backend (macOS 26+)
"/Library/Application Support/fuse-t/bin/go-nfsv4" \
  --backend fskit \
  --location /tmp/test_fuse \
  /Volumes/MarkBase_test
```

### Testing Plan

1. **Simple Mount Test**
   ```bash
   # Create test directory
   mkdir -p /tmp/test_source
   echo "Hello FUSE" > /tmp/test_source/test.txt
   
   # Mount using FUSE-T
   cargo run -- fuse mount --user test --dir /Volumes/MarkBase_test --backend nfs
   
   # Verify
   ls /Volumes/MarkBase_test
   cat /Volumes/MarkBase_test/test.txt
   ```

2. **Warren User Mount**
   ```bash
   cargo run -- fuse mount --user warren --dir /Volumes/MarkBase_warren --backend fskit
   
   # Expected: 12,659 nodes visible
   ls /Volumes/MarkBase_warren | wc -l
   ```

3. **Unmount Test**
   ```bash
   cargo run -- fuse unmount --dir /Volumes/MarkBase_test
   mount | grep MarkBase  # Should be empty
   ```

---

## Installation Success Criteria

| Criteria | Expected | Actual | Status |
|----------|----------|--------|--------|
| Package installed | Success | Success | ✅ |
| Binary exists | ✓ | ✓ | ✅ |
| Binary path | Correct path | `/Library/.../bin/go-nfsv4` | ✅ |
| Binary size | ~20MB | 20MB | ✅ |
| Version | 1.2.6 | 1.2.6 | ✅ |
| Libraries | dylib files | ✓ Found | ✅ |
| Headers | fuse3/*.h | ✓ Found | ✅ |
| Unit test | Pass | Pass | ✅ |

---

## Documentation Updates

**Updated Files:**
- `src/fuse/backend.rs` - Added detect_fuse_t_binary() and get_fuse_t_path()
- `src/main.rs` - Updated status command to use correct path
- `docs/FUSE_INSTALLATION.md` - To be updated with actual path

**Key Learnings:**
1. FUSE-T binary is NOT at `/usr/local/bin/fuse-t`
2. Actual location: `/Library/Application Support/fuse-t/bin/go-nfsv4`
3. Binary name: `go-nfsv4` (unified multi-backend binary)
4. Supports --backend parameter (nfs, fskit, smb)

---

## Conclusion

**FUSE-T Installation Status**: ✅ Fully Verified

**Next Phase**: Ready to implement real FUSE mount functionality

**Critical Path**: 
1. Implement mount() using go-nfsv4 binary ✅ Binary found
2. Test NFSv4 backend ⏳ Ready
3. Test FSKit backend ⏳ Ready
4. Mount warren user (12,659 nodes) ⏳ Ready

---

**Report Generated**: 2026-05-17 11:45  
**Status**: Installation Complete, Verification Complete, Ready for Phase 2