The plugin used "i" (int32) instead of "I" (uint32) for the count, so
when the client asks for 4294966784 bytes, the python plugin got -512.
nbdkit: python.0: debug: python: extents count=4294966784 offset=0 req_one=0
...
nbdkit: python.0: debug: extents: count=-512 offset=0 flags=0
With this fix I can get extents from rhv-upload-plugin using nbdinfo.
---
plugins/python/plugin.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/plugins/python/plugin.c b/plugins/python/plugin.c
index f85512b4..366619f9 100644
--- a/plugins/python/plugin.c
+++ b/plugins/python/plugin.c
@@ -957,21 +957,21 @@ py_extents (void *handle, uint32_t count, uint64_t offset,
ACQUIRE_PYTHON_GIL_FOR_CURRENT_SCOPE;
struct handle *h = handle;
PyObject *fn;
PyObject *r;
PyObject *iter, *t;
size_t size;
if (callback_defined ("extents", &fn)) {
PyErr_Clear ();
- r = PyObject_CallFunction (fn, "OiLI", h->py_h, count, offset, flags);
+ r = PyObject_CallFunction (fn, "OILI", h->py_h, count, offset, flags);
Py_DECREF (fn);
if (check_python_failure ("extents") == -1)
return -1;
iter = PyObject_GetIter (r);
if (iter == NULL) {
nbdkit_error ("extents method did not return "
"something which is iterable");
Py_DECREF (r);
return -1;
--
2.33.1