pyverbs: Raise proper exception class if error is returned

PyverbsRDMAErrno is using errno as the error code, this is a
problem where the error code is meaningful and can be checked.
Moreover, errno is not meaningful in these situations.

Reviewed-by: Chen Brasch <cbrasch@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Yonatan Nachum <ynachum@amazon.com>
Signed-off-by: Firas Jahjah <firasj@amazon.com>

pyverbs/cmid.pyx

@@ -2,7 +2,7 @@ from libc.stdint cimport uintptr_t, uint8_t
 from libc.string cimport memset
 import weakref
 
-from pyverbs.pyverbs_error import PyverbsUserError, PyverbsError
+from pyverbs.pyverbs_error import PyverbsUserError, PyverbsError, PyverbsRDMAError
 from pyverbs.qp cimport QPInitAttr, QPAttr, ECE
 from pyverbs.base import PyverbsRDMAErrno
 from pyverbs.base cimport close_weakrefs
@@ -598,7 +598,7 @@ cdef class CMID(PyverbsCM):
         init_attr = QPInitAttr()
         rc = v.ibv_query_qp(self.id.qp, &attr.attr, attr_mask, &init_attr.attr)
         if rc != 0:
-            raise PyverbsRDMAErrno('Failed to query QP')
+            raise PyverbsRDMAError('Failed to query QP', rc)
         return attr, init_attr
 
     def init_qp_attr(self, qp_state):

pyverbs/cq.pyx

@@ -152,7 +152,7 @@ cdef class CQ(PyverbsCM):
         while npolled < num_entries:
             rc = v.ibv_poll_cq(self.cq, 1, &wc)
             if rc < 0:
-                raise PyverbsRDMAErrno('Failed to poll CQ')
+                raise PyverbsRDMAError('Failed to poll CQ', -rc)
             if rc == 0:
                 break;
             npolled += 1

pyverbs/qp.pyx

@@ -1385,8 +1385,7 @@ cdef class QPEx(QP):
     def wr_complete(self):
         rc = v.ibv_wr_complete(self.qp_ex)
         if rc != 0:
-            raise PyverbsRDMAErrno('ibv_wr_complete failed , returned {}'.
-                                   format(rc))
+            raise PyverbsRDMAError('ibv_wr_complete failed.', rc)
 
     def wr_abort(self):
         v.ibv_wr_abort(self.qp_ex)