func (fs *AutoUnionFs) GetAttr(path string, context *fuse.Context) (*fuse.Attr, fuse.Status) {
if path == "" || path == _CONFIG || path == _STATUS {
a := &fuse.Attr{
Mode: fuse.S_IFDIR | 0755,
}
return a, fuse.OK
}
if path == filepath.Join(_STATUS, _DEBUG_SETTING) && fs.hasDebug() {
return &fuse.Attr{
Mode: fuse.S_IFLNK | 0644,
}, fuse.OK
}
if path == filepath.Join(_STATUS, _VERSION) {
a := &fuse.Attr{
Mode: fuse.S_IFREG | 0644,
Size: uint64(len(fuse.Version())),
}
return a, fuse.OK
}
if path == filepath.Join(_STATUS, _DEBUG) {
a := &fuse.Attr{
Mode: fuse.S_IFREG | 0644,
Size: uint64(len(fs.DebugData())),
}
return a, fuse.OK
}
if path == filepath.Join(_STATUS, _ROOT) {
a := &fuse.Attr{
Mode: syscall.S_IFLNK | 0644,
}
return a, fuse.OK
}
if path == filepath.Join(_CONFIG, _SCAN_CONFIG) {
a := &fuse.Attr{
Mode: fuse.S_IFREG | 0644,
}
return a, fuse.OK
}
comps := strings.Split(path, string(filepath.Separator))
if len(comps) > 1 && comps[0] == _CONFIG {
fs := fs.getUnionFs(comps[1])
if fs == nil {
return nil, fuse.ENOENT
}
a := &fuse.Attr{
Mode: syscall.S_IFLNK | 0644,
}
return a, fuse.OK
}
return nil, fuse.ENOENT
}
func (fs *AutoUnionFs) DebugData() string {
if fs.mountState == nil {
return "AutoUnionFs.mountState not set"
}
setting := fs.mountState.KernelSettings()
msg := fmt.Sprintf(
"Version: %v\n"+
"Bufferpool: %v\n"+
"Kernel: %v\n",
fuse.Version(),
fs.mountState.BufferPoolStats(),
&setting)
if fs.connector != nil {
msg += fmt.Sprintf("Live inodes: %d\n", fs.connector.InodeHandleCount())
}
return msg
}
func (fs *AutoUnionFs) Open(path string, flags uint32, context *fuse.Context) (fuse.File, fuse.Status) {
if path == filepath.Join(_STATUS, _DEBUG) {
if flags&fuse.O_ANYWRITE != 0 {
return nil, fuse.EPERM
}
return fuse.NewDataFile([]byte(fs.DebugData())), fuse.OK
}
if path == filepath.Join(_STATUS, _VERSION) {
if flags&fuse.O_ANYWRITE != 0 {
return nil, fuse.EPERM
}
return fuse.NewDataFile([]byte(fuse.Version())), fuse.OK
}
if path == filepath.Join(_CONFIG, _SCAN_CONFIG) {
if flags&fuse.O_ANYWRITE != 0 {
fs.updateKnownFses()
}
return fuse.NewDevNullFile(), fuse.OK
}
return nil, fuse.ENOENT
}
func main() {
version := flag.Bool("version", false, "print version number")
debug := flag.Bool("debug", false, "debug on")
hardlinks := flag.Bool("hardlinks", false, "support hardlinks")
delcache_ttl := flag.Float64("deletion_cache_ttl", 5.0, "Deletion cache TTL in seconds.")
branchcache_ttl := flag.Float64("branchcache_ttl", 5.0, "Branch cache TTL in seconds.")
deldirname := flag.String(
"deletion_dirname", "GOUNIONFS_DELETIONS", "Directory name to use for deletions.")
hide_readonly_link := flag.Bool("hide_readonly_link", true,
"Hides READONLY link from the top mountpoints. "+
"Enabled by default.")
portableInodes := flag.Bool("portable-inodes", false,
"Use sequential 32-bit inode numbers.")
flag.Parse()
if *version {
fmt.Println(fuse.Version())
os.Exit(0)
}
if len(flag.Args()) < 2 {
fmt.Println("Usage:\n main MOUNTPOINT BASEDIR")
os.Exit(2)
}
ufsOptions := unionfs.UnionFsOptions{
DeletionCacheTTL: time.Duration(*delcache_ttl * float64(time.Second)),
BranchCacheTTL: time.Duration(*branchcache_ttl * float64(time.Second)),
DeletionDirName: *deldirname,
}
options := unionfs.AutoUnionFsOptions{
UnionFsOptions: ufsOptions,
FileSystemOptions: fuse.FileSystemOptions{
EntryTimeout: time.Second,
AttrTimeout: time.Second,
NegativeTimeout: time.Second,
Owner: fuse.CurrentOwner(),
},
UpdateOnMount: true,
PathNodeFsOptions: fuse.PathNodeFsOptions{
ClientInodes: *hardlinks,
},
HideReadonly: *hide_readonly_link,
}
fsOpts := fuse.FileSystemOptions{
PortableInodes: *portableInodes,
}
fmt.Printf("AutoUnionFs - Go-FUSE Version %v.\n", fuse.Version())
gofs := unionfs.NewAutoUnionFs(flag.Arg(1), options)
pathfs := fuse.NewPathNodeFs(gofs, nil)
state, conn, err := fuse.MountNodeFileSystem(flag.Arg(0), pathfs, &fsOpts)
if err != nil {
fmt.Printf("Mount fail: %v\n", err)
os.Exit(1)
}
pathfs.Debug = *debug
conn.Debug = *debug
state.Debug = *debug
gofs.SetMountState(state)
gofs.SetFileSystemConnector(conn)
state.Loop()
time.Sleep(1 * time.Second)
}