dep: add github.com/ceph/go-ceph for rbd API

Signed-off-by: Niels de Vos <ndevos@redhat.com>

vendor/github.com/ceph/go-ceph/rados/object_iter.go

@@ -0,0 +1,92 @@
+package rados
+
+// #cgo LDFLAGS: -lrados
+// #include <rados/librados.h>
+//
+import "C"
+
+// Iter supports iterating over objects in the ioctx.
+type Iter struct {
+	ctx       C.rados_list_ctx_t
+	err       error
+	entry     string
+	namespace string
+}
+
+// IterToken supports reporting on and seeking to different positions.
+type IterToken uint32
+
+// Iter returns a Iterator object that can be used to list the object names in the current pool
+func (ioctx *IOContext) Iter() (*Iter, error) {
+	iter := Iter{}
+	if cerr := C.rados_nobjects_list_open(ioctx.ioctx, &iter.ctx); cerr < 0 {
+		return nil, getRadosError(int(cerr))
+	}
+	return &iter, nil
+}
+
+// Token returns a token marking the current position of the iterator. To be used in combination with Iter.Seek()
+func (iter *Iter) Token() IterToken {
+	return IterToken(C.rados_nobjects_list_get_pg_hash_position(iter.ctx))
+}
+
+// Seek moves the iterator to the position indicated by the token.
+func (iter *Iter) Seek(token IterToken) {
+	C.rados_nobjects_list_seek(iter.ctx, C.uint32_t(token))
+}
+
+// Next retrieves the next object name in the pool/namespace iterator.
+// Upon a successful invocation (return value of true), the Value method should
+// be used to obtain the name of the retrieved object name. When the iterator is
+// exhausted, Next returns false. The Err method should used to verify whether the
+// end of the iterator was reached, or the iterator received an error.
+//
+// Example:
+//	iter := pool.Iter()
+//	defer iter.Close()
+//	for iter.Next() {
+//		fmt.Printf("%v\n", iter.Value())
+//	}
+//	return iter.Err()
+//
+func (iter *Iter) Next() bool {
+	var c_entry *C.char
+	var c_namespace *C.char
+	if cerr := C.rados_nobjects_list_next(iter.ctx, &c_entry, nil, &c_namespace); cerr < 0 {
+		iter.err = getRadosError(int(cerr))
+		return false
+	}
+	iter.entry = C.GoString(c_entry)
+	iter.namespace = C.GoString(c_namespace)
+	return true
+}
+
+// Value returns the current value of the iterator (object name), after a successful call to Next.
+func (iter *Iter) Value() string {
+	if iter.err != nil {
+		return ""
+	}
+	return iter.entry
+}
+
+// Namespace returns the namespace associated with the current value of the iterator (object name), after a successful call to Next.
+func (iter *Iter) Namespace() string {
+	if iter.err != nil {
+		return ""
+	}
+	return iter.namespace
+}
+
+// Err checks whether the iterator has encountered an error.
+func (iter *Iter) Err() error {
+	if iter.err == ErrNotFound {
+		return nil
+	}
+	return iter.err
+}
+
+// Close the iterator cursor on the server. Be aware that iterators are not closed automatically
+// at the end of iteration.
+func (iter *Iter) Close() {
+	C.rados_nobjects_list_close(iter.ctx)
+}