.

wcfs/wcfs.go

@@ -246,28 +246,75 @@ import (
 	"flag"
 	"log"
 	"os"
-
-	"github.com/hanwen/go-fuse/fuse/nodefs"
+	"sync"
+	"syscall"
 
 	"lab.nexedi.com/kirr/neo/go/zodb"
 	_ "lab.nexedi.com/kirr/neo/go/zodb/wks"
+
+	"github.com/hanwen/go-fuse/fuse"
+	"github.com/hanwen/go-fuse/fuse/nodefs"
 )
 
 // BigFileRoot represents "/bigfile"
 type BigFileRoot struct {
 	nodefs.Node
-
 	zstor zodb.IStorage
-}
 
+	mu  sync.Mutex
+	tab map[zodb.Oid]*BigFile
+}
 
 func NewBigFileRoot(zstor zodb.IStorage) *BigFileRoot {
 	return &BigFileRoot{
 		Node:  nodefs.NewDefaultNode(),
 		zstor: zstor,
+		tab:   make(map[zodb.Oid]*BigFile),
 	}
 }
 
+// Mkdir receives client request to create /bigfile/<bigfileX>.
+func (br *BigFileRoot) Mkdir(name string, mode uint32, _ *fuse.Context) (*nodefs.Inode, fuse.Status) {
+	oid, err := zodb.ParseOid(name)
+	if err != nil {
+		log.Printf("/bigfile: mkdir: non-oid: %q", name)
+		return nil, fuse.EINVAL
+	}
+
+	// XXX ok to ignore mode?
+
+	br.mu.Lock()
+	defer br.mu.Unlock()
+
+	if _, already := br.tab[oid]; already {
+		return nil, fuse.Status(syscall.EEXIST)
+	}
+
+	bf := NewBigFile(oid, br)
+	br.tab[oid] = bf
+	mkdir(br, name, bf) // XXX takes treeLock - ok under br.mu ?
+	return bf.Inode(), fuse.OK
+}
+
+// XXX do we need to support rmdir? (probably no)
+
+
+// BigFile represents "/bigfile/<bigfileX>"
+type BigFile struct {
+	nodefs.Node
+	oid  zodb.Oid
+	root *BigFileRoot
+}
+
+func NewBigFile(oid zodb.Oid, root *BigFileRoot) *BigFile {
+	return &BigFile{
+		Node: nodefs.NewDefaultNode(),
+		oid:  oid,
+		root: root,
+	}
+}
+
+
 
 // XXX option to prevent starting if wcfs was already started ?
 // XXX option to automatically exit/unmount if there are no requests for some t
@@ -301,7 +348,7 @@ func main() {
 
 	server, _, err := nodefs.MountRoot(mntpt, root, opts)
 	if err != nil {
-		log.Fatal(err)	// XXX err ctx?
+		log.Fatal(err)
 	}
 
 	// add entries to /

wcfs/wcfs_test.py

@@ -103,7 +103,7 @@ def test_join_autostart():
 
 # XXX parametrize zblk0, zblk1
 # XXX select !wcfs mode so that we prepare data through !wcfs path.
-def _test_bigfile_empty():
+def test_bigfile_empty():
     root = testdb.dbopen()
     root['zfile'] = f = ZBigFile(blksize)
     transaction.commit()