.

wcfs/wcfs.go

@@ -311,7 +311,7 @@ type BigFileData struct {
 	// XXX do we need to keep it here explicitly?
 	zconn	*zodb.Connection
 
-	zbf	*ZBigFile
+	zbf	*ZBigFile	// XXX kept always activated
 
 	// TODO
 	// lastChange	zodb.Tid // last change to whole bigfile as of .zconn.At view
@@ -382,6 +382,17 @@ func (bfroot *BigFileRoot) Mkdir(name string, mode uint32, fctx *fuse.Context) (
 		return nil, fuse.EINVAL
 	}
 
+	// acticate ZBigFile and keep it this way
+	err = zbf.PActivate(ctx)
+	if err != nil {
+		log.Printf("/bigfile: mkdir %q: %s", name, err)
+		return nil, fuse.EIO
+	}
+	defer func() {
+		if status != fuse.OK {
+			zbf.PDeactivate()
+		}
+	}()
 
 	// relock bfroot and either mkdir or EEXIST if the directory was maybe
 	// simultanously created while we were not holding bfroot.mu
@@ -426,6 +437,23 @@ func (bfroot *BigFileRoot) Mkdir(name string, mode uint32, fctx *fuse.Context) (
 // XXX do we need to support rmdir? (probably no)
 
 
+// /bigfile/<bigfileX>/head/data -> Getattr serves stat.
+func (bfdata *BigFileData) GetAttr(out *fuse.Attr, _ nodefs.File, fctx *fuse.Context) fuse.Status {
+	out.Mode = fuse.S_IFREG | 0444
+	out.Size = 0	// FIXME
+	// .Blocks
+
+	// FIXME lastChange should cover all bigfile data, not only ZBigFile itself
+	//mtime := &bfdata.lastChange.Time().Time
+	lastChange := bfdata.zbf.PSerial()
+
+	mtime := lastChange.Time().Time
+	out.SetTimes(/*atime=*/nil, /*mtime=*/&mtime, /*ctime=*/&mtime)
+
+	return fuse.OK
+}
+
+
 // Read implements reading from /bigfile/<bigfileX>/head/data.
 // XXX and from /bigfile/<bigfileX>/@<tidX>/data.
 /*
@@ -437,11 +465,10 @@ func (bf *BigFileData) Read(_ nodefs.File, dest []byte, off int64, _ fuse.Contex
 */
 
 
-// zodbCacheControl implements LiveCacheControl to tune ZODB to never evict
-
 
 
 
+// zodbCacheControl implements LiveCacheControl to tune ZODB to never evict
 // LOBTree/LOBucket from live cache. We want to keep LOBTree/LOBucket always alive
 // becuse it is essentially the index where to find ZBigFile data.
 //
@@ -458,6 +485,8 @@ func (cc *zodbCacheControl) WantEvict(obj zodb.IPersistent) bool {
 
 	case *btree.LOBTree:
 	case *btree.LOBucket:
+
+	// XXX + ZBigFile ?
 	}
 
 	return false