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tools: ynl: allow user to pass enum string instead of scalar value 

During decoding of messages coming from kernel, attribute values are
converted to enum names in case the attribute type is enum of bitfield32.

However, when user constructs json message, he has to pass plain scalar
values. See "state" "selector" and "value" attributes in following
examples:

$ sudo ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/dpll.yaml --do pin-set --json '{"id": 0, "parent-device": {"parent-id": 0, "state": 1}}'
$ sudo ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/devlink.yaml --do port-set --json '{"bus-name": "pci", "dev-name": "0000:08:00.1", "port-index": 98304, "port-function": {"caps": {"selector": 1, "value": 1 }}}'

Allow user to pass strings containing enum names, convert them to scalar
values to be encoded into Netlink message:

$ sudo ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/dpll.yaml --do pin-set --json '{"id": 0, "parent-device": {"parent-id": 0, "state": "connected"}}'
$ sudo ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/devlink.yaml --do port-set --json '{"bus-name": "pci", "dev-name": "0000:08:00.1", "port-index": 98304, "port-function": {"caps": {"selector": ["roce-bit"], "value": ["roce-bit"] }}}'

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20240222134351.224704-4-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jiri Pirko 2024-02-22 14:43:51 +01:00 committed by Jakub Kicinski
parent ffe10a4546
commit e8a6c515ff
1 changed files with 24 additions and 2 deletions
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26
tools/net/ynl/lib/ynl.py
View File

@ -438,6 +438,26 @@ class YnlFamily(SpecFamily):
self.sock.setsockopt(Netlink.SOL_NETLINK, Netlink.NETLINK_ADD_MEMBERSHIP,
mcast_id)
def _encode_enum(self, attr_spec, value):
enum = self.consts[attr_spec['enum']]
if enum.type == 'flags' or attr_spec.get('enum-as-flags', False):
scalar = 0
if isinstance(value, str):
value = [value]
for single_value in value:
scalar += enum.entries[single_value].user_value(as_flags = True)
return scalar
else:
return enum.entries[value].user_value()
def _get_scalar(self, attr_spec, value):
try:
return int(value)
except (ValueError, TypeError) as e:
if 'enum' not in attr_spec:
raise e
return self._encode_enum(attr_spec, value);
def _add_attr(self, space, name, value, search_attrs):
try:
attr = self.attr_sets[space][name]
@ -475,7 +495,7 @@ class YnlFamily(SpecFamily):
else:
raise Exception(f'Unknown type for binary attribute, value: {value}')
elif attr['type'] in NlAttr.type_formats or attr.is_auto_scalar:
scalar = int(value)
scalar = self._get_scalar(attr, value)
if attr.is_auto_scalar:
attr_type = attr["type"][0] + ('32' if scalar.bit_length() <= 32 else '64')
else:
@ -483,7 +503,9 @@ class YnlFamily(SpecFamily):
format = NlAttr.get_format(attr_type, attr.byte_order)
attr_payload = format.pack(scalar)
elif attr['type'] in "bitfield32":
attr_payload = struct.pack("II", int(value["value"]), int(value["selector"]))
scalar_value = self._get_scalar(attr, value["value"])
scalar_selector = self._get_scalar(attr, value["selector"])
attr_payload = struct.pack("II", scalar_value, scalar_selector)
elif attr['type'] == 'sub-message':
msg_format = self._resolve_selector(attr, search_attrs)
attr_payload = b''