Address John's review comments.

Signed-off-by: Mattias Nissler <mnissler@rivosinc.com>

test/py/libvfio_user.py

@@ -32,7 +32,6 @@
 #
 
 from types import SimpleNamespace
-import collections.abc
 import ctypes as c
 import array
 import errno
@@ -693,31 +692,13 @@ def __init__(self, sock=None):
  self.sock = sock
  self.client_cmd_socket = None
 
- def connect(self, ctx, capabilities={}):
+ def connect(self, ctx):
  self.sock = connect_sock()
 
- effective_caps = {
- "capabilities": {
- "max_data_xfer_size": VFIO_USER_DEFAULT_MAX_DATA_XFER_SIZE,
- "max_msg_fds": 8,
- "twin_socket": False,
- },
- }
-
- def update(target, overrides):
- for k, v in overrides.items():
- if isinstance(v, collections.abc.Mapping):
- target[k] = target.get(k, {})
- update(target[k], v)
- else:
- target[k] = v
-
- update(effective_caps, capabilities)
- caps_json = json.dumps(effective_caps)
-
+ json = b'{ "capabilities": { "max_msg_fds": 8 } }'
  # struct vfio_user_version
- payload = struct.pack("HH%dsc" % len(caps_json), LIBVFIO_USER_MAJOR,
- LIBVFIO_USER_MINOR, caps_json.encode(), b'\0')
+ payload = struct.pack("HH%dsc" % len(json), LIBVFIO_USER_MAJOR,
+ LIBVFIO_USER_MINOR, json, b'\0')
  hdr = vfio_user_header(VFIO_USER_VERSION, size=len(payload))
  self.sock.send(hdr + payload)
  vfu_attach_ctx(ctx, expect=0)