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package main
import (
"bazil.org/fuse"
"bazil.org/fuse/fs"
"code.google.com/p/weed-fs/go/filer"
"code.google.com/p/weed-fs/go/glog"
"code.google.com/p/weed-fs/go/storage"
"code.google.com/p/weed-fs/go/util"
"fmt"
"os"
"os/signal"
"runtime"
)
type MountOptions struct {
filer *string
dir *string
}
var (
mountOptions MountOptions
)
func init() {
cmdMount.Run = runMount // break init cycle
cmdMount.IsDebug = cmdMount.Flag.Bool("debug", false, "verbose debug information")
mountOptions.filer = cmdMount.Flag.String("filer", "localhost:8888", "weedfs filer location")
mountOptions.dir = cmdMount.Flag.String("dir", "", "mount weed filer to this directory")
}
var cmdMount = &Command{
UsageLine: "mount -filer=localhost:8888 -dir=/some/dir",
Short: "mount weed filer to a directory as file system in userspace(FUSE)",
Long: `mount weed file system to userspace.
Pre-requisites:
1) have a weed file system running
2) have a "weed filer" running
These 2 requirements can be achieved with one command "weed server -filer=true"
This uses bazil.org/fuse, whichenables writing FUSE file systems on
FreeBSD, Linux, and OS X.
On OS X, it requires OSXFUSE (http://osxfuse.github.com/).
`,
}
func runMount(cmd *Command, args []string) bool {
fmt.Printf("This is Weed File System version %s %s %s\n", util.VERSION, runtime.GOOS, runtime.GOARCH)
if *mountOptions.dir == "" {
fmt.Printf("Please specify the mount directory via \"-dir\"")
return false
}
c, err := fuse.Mount(*mountOptions.dir)
if err != nil {
glog.Fatal(err)
return false
}
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, os.Interrupt)
go func() {
for _ = range signalChan {
// sig is a ^C, handle it
fuse.Unmount(*mountOptions.dir)
c.Close()
os.Exit(0)
}
}()
err = fs.Serve(c, WFS{})
if err != nil {
fuse.Unmount(*mountOptions.dir)
}
// check if the mount process has an error to report
<-c.Ready
if err := c.MountError; err != nil {
glog.Fatal(err)
}
return true
}
type File struct {
FileId filer.FileId
Name string
}
func (File) Attr() fuse.Attr {
return fuse.Attr{Mode: 0444}
}
func (File) ReadAll(intr fs.Intr) ([]byte, fuse.Error) {
return []byte("hello, world\n"), nil
}
type Dir struct {
DirectoryId filer.DirectoryId
Name string
}
func (dir Dir) Attr() fuse.Attr {
return fuse.Attr{Inode: 1, Mode: os.ModeDir | 0555}
}
func (dir Dir) Lookup(name string, intr fs.Intr) (fs.Node, fuse.Error) {
files_result, e := filer.ListFiles(*mountOptions.filer, dir.DirectoryId, name)
if e != nil {
return nil, fuse.ENOENT
}
if len(files_result.Files) > 0 {
return File{files_result.Files[0].Id, files_result.Files[0].Name}, nil
}
return nil, fmt.Errorf("File Not Found for %s", name)
}
type WFS struct{}
func (WFS) Root() (fs.Node, fuse.Error) {
return Dir{}, nil
}
func (dir *Dir) ReadDir(intr fs.Intr) ([]fuse.Dirent, fuse.Error) {
ret := make([]fuse.Dirent, 0)
if dirs, e := filer.ListDirectories(*mountOptions.filer, dir.DirectoryId); e == nil {
for _, d := range dirs.Directories {
dirId := uint64(d.Id)
ret = append(ret, fuse.Dirent{Inode: dirId, Name: d.Name, Type: fuse.DT_Dir})
}
}
if files, e := filer.ListFiles(*mountOptions.filer, dir.DirectoryId, ""); e == nil {
for _, f := range files.Files {
if fileId, e := storage.ParseFileId(string(f.Id)); e == nil {
fileInode := uint64(fileId.VolumeId)<<32 + fileId.Key
ret = append(ret, fuse.Dirent{Inode: fileInode, Name: f.Name, Type: fuse.DT_File})
}
}
}
return ret, nil
}
|
