diff --git a/libstorage/fs.c b/libstorage/fs.c
index 6a7d842..3017998 100644
--- a/libstorage/fs.c
+++ b/libstorage/fs.c
@@ -22,145 +22,157 @@ void storage_fsHandler(void *data, msg_t *msg)
 	storage_fs_t *fs;
 
 	if (data == NULL) {
-		msg->o.io.err = -EINVAL;
+		msg->o.err = -EINVAL;
 		return;
 	}
 
 	fs = (storage_fs_t *)data;
 	if (fs->ops == NULL) {
-		msg->o.io.err = -EINVAL;
+		msg->o.err = -EINVAL;
 		return;
 	}
 
 	switch (msg->type) {
 		case mtOpen:
 			if (fs->ops->open == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->open(fs->info, &msg->i.openclose.oid);
+			msg->o.err = fs->ops->open(fs->info, &msg->oid);
 			break;
 
 		case mtClose:
 			if (fs->ops->close == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->close(fs->info, &msg->i.openclose.oid);
+			msg->o.err = fs->ops->close(fs->info, &msg->oid);
 			break;
 
 		case mtRead:
 			if (fs->ops->read == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->read(fs->info, &msg->i.io.oid, msg->i.io.offs, msg->o.data, msg->o.size);
+			msg->o.err = fs->ops->read(fs->info, &msg->oid, msg->i.io.offs, msg->o.data, msg->o.size);
 			break;
 
 		case mtWrite:
 			if (fs->ops->write == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->write(fs->info, &msg->i.io.oid, msg->i.io.offs, msg->i.data, msg->i.size);
+			msg->o.err = fs->ops->write(fs->info, &msg->oid, msg->i.io.offs, msg->i.data, msg->i.size);
 			break;
 
 		case mtTruncate:
 			if (fs->ops->truncate == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->truncate(fs->info, &msg->i.io.oid, msg->i.io.len);
+			msg->o.err = fs->ops->truncate(fs->info, &msg->oid, msg->i.io.len);
 			break;
 
 		case mtDevCtl:
 			if (fs->ops->devctl == NULL) {
 				/* FIXME this error passing works by accident on ioctl(),
 				 * there's no dedicated error field for devctl. */
-				msg->o.io.err = -ENOTTY; /* To return valid errno on ioctl() */
+				msg->o.err = -ENOTTY; /* To return valid errno on ioctl() */
 				break;
 			}
-			fs->ops->devctl(fs->info, &msg->i.io.oid, msg->i.raw, msg->o.raw);
+			fs->ops->devctl(fs->info, &msg->oid, msg->i.raw, msg->o.raw);
 			break;
 
 		case mtCreate:
 			if (fs->ops->create == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.create.err = fs->ops->create(fs->info, &msg->i.create.dir, msg->i.data, &msg->o.create.oid, msg->i.create.mode, msg->i.create.type, &msg->i.create.dev);
+			msg->o.err = fs->ops->create(fs->info, &msg->oid, msg->i.data, &msg->o.create.oid, msg->i.create.mode, msg->i.create.type, &msg->i.create.dev);
 			break;
 
 		case mtDestroy:
 			if (fs->ops->destroy == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->destroy(fs->info, &msg->i.destroy.oid);
+			msg->o.err = fs->ops->destroy(fs->info, &msg->oid);
 			break;
 
 		case mtSetAttr:
 			if (fs->ops->setattr == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.attr.err = fs->ops->setattr(fs->info, &msg->i.attr.oid, msg->i.attr.type, msg->i.attr.val, msg->i.data, msg->i.size);
+			msg->o.err = fs->ops->setattr(fs->info, &msg->oid, msg->i.attr.type, msg->i.attr.val, msg->i.data, msg->i.size);
 			break;
 
 		case mtGetAttr:
 			if (fs->ops->getattr == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.attr.err = fs->ops->getattr(fs->info, &msg->i.attr.oid, msg->i.attr.type, &msg->o.attr.val);
+			msg->o.err = fs->ops->getattr(fs->info, &msg->oid, msg->i.attr.type, &msg->o.attr.val);
+			break;
+
+		case mtGetAttrAll:
+			if (fs->ops->getattrall == NULL) {
+				msg->o.err = -ENOSYS;
+				break;
+			}
+			if ((msg->o.size < sizeof(struct _attrAll)) || (msg->o.data == NULL)) {
+				msg->o.err = -EINVAL;
+				break;
+			}
+			msg->o.err = fs->ops->getattrall(fs->info, &msg->oid, (struct _attrAll *)msg->o.data);
 			break;
 
 		case mtLookup:
 			if (fs->ops->lookup == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.lookup.err = fs->ops->lookup(fs->info, &msg->i.lookup.dir, msg->i.data, &msg->o.lookup.fil, &msg->o.lookup.dev, msg->o.data, msg->o.size);
+			msg->o.err = fs->ops->lookup(fs->info, &msg->oid, msg->i.data, &msg->o.lookup.fil, &msg->o.lookup.dev, msg->o.data, msg->o.size);
 			break;
 
 		case mtLink:
 			if (fs->ops->link == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->link(fs->info, &msg->i.ln.dir, msg->i.data, &msg->i.ln.oid);
+			msg->o.err = fs->ops->link(fs->info, &msg->oid, msg->i.data, &msg->i.ln.oid);
 			break;
 
 		case mtUnlink:
 			if (fs->ops->unlink == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->unlink(fs->info, &msg->i.ln.dir, msg->i.data);
+			msg->o.err = fs->ops->unlink(fs->info, &msg->oid, msg->i.data);
 			break;
 
 		case mtReaddir:
 			if (fs->ops->readdir == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->readdir(fs->info, &msg->i.readdir.dir, msg->i.readdir.offs, msg->o.data, msg->o.size);
+			msg->o.err = fs->ops->readdir(fs->info, &msg->oid, msg->i.readdir.offs, msg->o.data, msg->o.size);
 			break;
 
 		case mtStat:
 			if (fs->ops->statfs == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			msg->o.io.err = fs->ops->statfs(fs->info, msg->o.data, msg->o.size);
+			msg->o.err = fs->ops->statfs(fs->info, msg->o.data, msg->o.size);
 			break;
 
 		case mtSync:
 			if (fs->ops->sync == NULL) {
-				msg->o.io.err = -ENOSYS;
+				msg->o.err = -ENOSYS;
 				break;
 			}
-			fs->ops->sync(fs->info, &msg->i.io.oid);
+			fs->ops->sync(fs->info, &msg->oid);
 			break;
 
 		default:
diff --git a/libstorage/include/storage/fs.h b/libstorage/include/storage/fs.h
index 478d7ee..d3b4fd6 100644
--- a/libstorage/include/storage/fs.h
+++ b/libstorage/include/storage/fs.h
@@ -29,10 +29,11 @@ typedef struct {
 
 	ssize_t (*read)(void *info, oid_t *oid, off_t offs, void *data, size_t len);
 	ssize_t (*write)(void *info, oid_t *oid, off_t offs, const void *data, size_t len);
-	int (*setattr)(void *info, oid_t *oid, int type, long long attr, void *data, size_t len);
+	int (*setattr)(void *info, oid_t *oid, int type, long long attr, const void *data, size_t len);
 	int (*getattr)(void *info, oid_t *oid, int type, long long *attr);
+	int (*getattrall)(void *info, oid_t *oid, struct _attrAll *attrs);
 	int (*truncate)(void *info, oid_t *oid, size_t size);
-	void (*devctl)(void *info, oid_t *oid, const void *in, void *out);
+	int (*devctl)(void *info, oid_t *oid, const void *in, void *out);
 
 	int (*create)(void *info, oid_t *oid, const char *name, oid_t *dev, unsigned mode, int type, oid_t *res);
 	int (*destroy)(void *info, oid_t *oid);