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Date: Tue, 7 Mar 2023 16:39:22 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com,
lorenzo@...nel.org, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net 1/2] tools: ynl: move the enum classes to shared code
Move bulk of the EnumSet and EnumEntry code to shared
code for reuse by cli.
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
tools/net/ynl/lib/__init__.py | 7 ++-
tools/net/ynl/lib/nlspec.py | 96 ++++++++++++++++++++++++++++++
tools/net/ynl/ynl-gen-c.py | 107 +++++++---------------------------
3 files changed, 121 insertions(+), 89 deletions(-)
diff --git a/tools/net/ynl/lib/__init__.py b/tools/net/ynl/lib/__init__.py
index a2cb8b16d6f1..4b3797fe784b 100644
--- a/tools/net/ynl/lib/__init__.py
+++ b/tools/net/ynl/lib/__init__.py
@@ -1,7 +1,8 @@
# SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
-from .nlspec import SpecAttr, SpecAttrSet, SpecFamily, SpecOperation
+from .nlspec import SpecAttr, SpecAttrSet, SpecEnumEntry, SpecEnumSet, \
+ SpecFamily, SpecOperation
from .ynl import YnlFamily
-__all__ = ["SpecAttr", "SpecAttrSet", "SpecFamily", "SpecOperation",
- "YnlFamily"]
+__all__ = ["SpecAttr", "SpecAttrSet", "SpecEnumEntry", "SpecEnumSet",
+ "SpecFamily", "SpecOperation", "YnlFamily"]
diff --git a/tools/net/ynl/lib/nlspec.py b/tools/net/ynl/lib/nlspec.py
index 0a2cfb5862aa..7c1cf6c1499e 100644
--- a/tools/net/ynl/lib/nlspec.py
+++ b/tools/net/ynl/lib/nlspec.py
@@ -57,6 +57,91 @@ jsonschema = None
pass
+class SpecEnumEntry(SpecElement):
+ """ Entry within an enum declared in the Netlink spec.
+
+ Attributes:
+ doc documentation string
+ enum_set back reference to the enum
+ value numerical value of this enum (use accessors in most situations!)
+
+ Methods:
+ raw_value raw value, i.e. the id in the enum, unlike user value which is a mask for flags
+ user_value user value, same as raw value for enums, for flags it's the mask
+ """
+ def __init__(self, enum_set, yaml, prev, value_start):
+ if isinstance(yaml, str):
+ yaml = {'name': yaml}
+ super().__init__(enum_set.family, yaml)
+
+ self.doc = yaml.get('doc', '')
+ self.enum_set = enum_set
+
+ if 'value' in yaml:
+ self.value = yaml['value']
+ elif prev:
+ self.value = prev.value + 1
+ else:
+ self.value = value_start
+
+ def has_doc(self):
+ return bool(self.doc)
+
+ def raw_value(self):
+ return self.value
+
+ def user_value(self):
+ if self.enum_set['type'] == 'flags':
+ return 1 << self.value
+ else:
+ return self.value
+
+
+class SpecEnumSet(SpecElement):
+ """ Enum type
+
+ Represents an enumeration (list of numerical constants)
+ as declared in the "definitions" section of the spec.
+
+ Attributes:
+ type enum or flags
+ entries entries by name
+ Methods:
+ get_mask for flags compute the mask of all defined values
+ """
+ def __init__(self, family, yaml):
+ super().__init__(family, yaml)
+
+ self.type = yaml['type']
+
+ prev_entry = None
+ value_start = self.yaml.get('value-start', 0)
+ self.entries = dict()
+ for entry in self.yaml['entries']:
+ e = self.new_entry(entry, prev_entry, value_start)
+ self.entries[e.name] = e
+ prev_entry = e
+
+ def new_entry(self, entry, prev_entry, value_start):
+ return SpecEnumEntry(self, entry, prev_entry, value_start)
+
+ def has_doc(self):
+ if 'doc' in self.yaml:
+ return True
+ for entry in self.entries.values():
+ if entry.has_doc():
+ return True
+ return False
+
+ def get_mask(self):
+ mask = 0
+ idx = self.yaml.get('value-start', 0)
+ for _ in self.entries.values():
+ mask |= 1 << idx
+ idx += 1
+ return mask
+
+
class SpecAttr(SpecElement):
""" Single Netlink atttribute type
@@ -193,6 +278,7 @@ jsonschema = None
msgs dict of all messages (index by name)
msgs_by_value dict of all messages (indexed by name)
ops dict of all valid requests / responses
+ consts dict of all constants/enums
"""
def __init__(self, spec_path, schema_path=None):
with open(spec_path, "r") as stream:
@@ -222,6 +308,7 @@ jsonschema = None
self.req_by_value = collections.OrderedDict()
self.rsp_by_value = collections.OrderedDict()
self.ops = collections.OrderedDict()
+ self.consts = collections.OrderedDict()
last_exception = None
while len(self._resolution_list) > 0:
@@ -242,6 +329,9 @@ jsonschema = None
if len(resolved) == 0:
raise last_exception
+ def new_enum(self, elem):
+ return SpecEnumSet(self, elem)
+
def new_attr_set(self, elem):
return SpecAttrSet(self, elem)
@@ -296,6 +386,12 @@ jsonschema = None
def resolve(self):
self.resolve_up(super())
+ for elem in self.yaml['definitions']:
+ if elem['type'] == 'enum' or elem['type'] == 'flags':
+ self.consts[elem['name']] = self.new_enum(elem)
+ else:
+ self.consts[elem['name']] = elem
+
for elem in self.yaml['attribute-sets']:
attr_set = self.new_attr_set(elem)
self.attr_sets[elem['name']] = attr_set
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index c940ca834d3f..1bcc5354d800 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -6,7 +6,7 @@ import collections
import os
import yaml
-from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation
+from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, SpecEnumEntry
def c_upper(name):
@@ -567,97 +567,37 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation
self.inherited = [c_lower(x) for x in sorted(self._inherited)]
-class EnumEntry:
+class EnumEntry(SpecEnumEntry):
def __init__(self, enum_set, yaml, prev, value_start):
- if isinstance(yaml, str):
- self.name = yaml
- yaml = {}
- self.doc = ''
- else:
- self.name = yaml['name']
- self.doc = yaml.get('doc', '')
-
- self.yaml = yaml
- self.enum_set = enum_set
- self.c_name = c_upper(enum_set.value_pfx + self.name)
-
- if 'value' in yaml:
- self.value = yaml['value']
- if prev:
- self.value_change = (self.value != prev.value + 1)
- elif prev:
- self.value_change = False
- self.value = prev.value + 1
+ super().__init__(enum_set, yaml, prev, value_start)
+
+ if prev:
+ self.value_change = (self.value != prev.value + 1)
else:
- self.value = value_start
self.value_change = (self.value != 0)
-
self.value_change = self.value_change or self.enum_set['type'] == 'flags'
- def __getitem__(self, key):
- return self.yaml[key]
-
- def __contains__(self, key):
- return key in self.yaml
-
- def has_doc(self):
- return bool(self.doc)
+ # Added by resolve:
+ self.c_name = None
+ delattr(self, "c_name")
- # raw value, i.e. the id in the enum, unlike user value which is a mask for flags
- def raw_value(self):
- return self.value
+ def resolve(self):
+ self.resolve_up(super())
- # user value, same as raw value for enums, for flags it's the mask
- def user_value(self):
- if self.enum_set['type'] == 'flags':
- return 1 << self.value
- else:
- return self.value
+ self.c_name = c_upper(self.enum_set.value_pfx + self.name)
-class EnumSet:
+class EnumSet(SpecEnumSet):
def __init__(self, family, yaml):
- self.yaml = yaml
- self.family = family
-
self.render_name = c_lower(family.name + '-' + yaml['name'])
self.enum_name = 'enum ' + self.render_name
self.value_pfx = yaml.get('name-prefix', f"{family.name}-{yaml['name']}-")
- self.type = yaml['type']
-
- prev_entry = None
- value_start = self.yaml.get('value-start', 0)
- self.entries = {}
- self.entry_list = []
- for entry in self.yaml['entries']:
- e = EnumEntry(self, entry, prev_entry, value_start)
- self.entries[e.name] = e
- self.entry_list.append(e)
- prev_entry = e
-
- def __getitem__(self, key):
- return self.yaml[key]
-
- def __contains__(self, key):
- return key in self.yaml
-
- def has_doc(self):
- if 'doc' in self.yaml:
- return True
- for entry in self.entry_list:
- if entry.has_doc():
- return True
- return False
+ super().__init__(family, yaml)
- def get_mask(self):
- mask = 0
- idx = self.yaml.get('value-start', 0)
- for _ in self.entry_list:
- mask |= 1 << idx
- idx += 1
- return mask
+ def new_entry(self, entry, prev_entry, value_start):
+ return EnumEntry(self, entry, prev_entry, value_start)
class AttrSet(SpecAttrSet):
@@ -792,8 +732,6 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation
self.mcgrps = self.yaml.get('mcast-groups', {'list': []})
- self.consts = dict()
-
self.hooks = dict()
for when in ['pre', 'post']:
self.hooks[when] = dict()
@@ -820,6 +758,9 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation
if self.kernel_policy == 'global':
self._load_global_policy()
+ def new_enum(self, elem):
+ return EnumSet(self, elem)
+
def new_attr_set(self, elem):
return AttrSet(self, elem)
@@ -837,12 +778,6 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation
}
def _dictify(self):
- for elem in self.yaml['definitions']:
- if elem['type'] == 'enum' or elem['type'] == 'flags':
- self.consts[elem['name']] = EnumSet(self, elem)
- else:
- self.consts[elem['name']] = elem
-
ntf = []
for msg in self.msgs.values():
if 'notify' in msg:
@@ -1980,7 +1915,7 @@ _C_KW = {
if 'doc' in enum:
doc = ' - ' + enum['doc']
cw.write_doc_line(enum.enum_name + doc)
- for entry in enum.entry_list:
+ for entry in enum.entries.values():
if entry.has_doc():
doc = '@' + entry.c_name + ': ' + entry['doc']
cw.write_doc_line(doc)
@@ -1988,7 +1923,7 @@ _C_KW = {
uapi_enum_start(family, cw, const, 'name')
name_pfx = const.get('name-prefix', f"{family.name}-{const['name']}-")
- for entry in enum.entry_list:
+ for entry in enum.entries.values():
suffix = ','
if entry.value_change:
suffix = f" = {entry.user_value()}" + suffix
--
2.39.2
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