Code generators to turn Netlink specs into C code.
I'm definitely not proud of it.
The main generator is in Python, there's a bash script
to regen all code-gen'ed files in tree after making
spec changes.
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
---
MAINTAINERS | 1 +
tools/net/ynl/ynl-gen-c.py | 1998 ++++++++++++++++++++++++++++++++++++
tools/net/ynl/ynl-regen.sh | 30 +
3 files changed, 2029 insertions(+)
create mode 100755 tools/net/ynl/ynl-gen-c.py
create mode 100755 tools/net/ynl/ynl-regen.sh
diff --git a/MAINTAINERS b/MAINTAINERS
index 93b7b6000654..e03123d776cd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14202,6 +14202,7 @@ F: include/uapi/linux/netdevice.h
F: lib/net_utils.c
F: lib/random32.c
F: net/
+F: tools/net/
F: tools/testing/selftests/net/
NETWORKING [IPSEC]
diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
new file mode 100755
index 000000000000..69800aecd45b
--- /dev/null
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -0,0 +1,1998 @@
+#!/usr/bin/env python
+
+import argparse
+import jsonschema
+import os
+import yaml
+
+
+def c_upper(name):
+ return name.upper().replace('-', '_')
+
+
+def c_lower(name):
+ return name.lower().replace('-', '_')
+
+
+class BaseNlLib:
+ def __init__(self):
+ pass
+
+ def get_family_id(self):
+ return 'ys->family_id'
+
+ def parse_cb_run(self, cb, data, is_dump=False, indent=1):
+ ind = '\n\t\t' + '\t' * indent + ' '
+ if is_dump:
+ return f"mnl_cb_run2(ys->rx_buf, len, 0, 0, {cb}, {data},{ind}ynl_cb_array, NLMSG_MIN_TYPE)"
+ else:
+ return f"mnl_cb_run2(ys->rx_buf, len, ys->seq, ys->portid,{ind}{cb}, {data},{ind}" + \
+ "ynl_cb_array, NLMSG_MIN_TYPE)"
+
+
+class Type:
+ def __init__(self, family, attr_set, attr):
+ self.family = family
+ self.attr = attr
+ self.value = attr['value']
+ self.name = attr['name'].replace('-', '_')
+ self.type = attr['type']
+ self.checks = attr.get('checks', {})
+
+ if 'len' in attr:
+ self.len = attr['len']
+ if 'nested-attributes' in attr:
+ self.nested_attrs = attr['nested-attributes']
+ if self.nested_attrs == family.name:
+ self.nested_render_name = f"{family.name}"
+ else:
+ self.nested_render_name = f"{family.name}_{self.nested_attrs.replace('-', '_')}"
+
+ self.enum_name = f"{attr_set.name_prefix}{self.name}"
+ self.enum_name = self.enum_name.upper().replace('-', '_')
+ self.c_name = self.name.replace('-', '_')
+ if self.c_name in c_kw:
+ self.c_name += '_'
+
+ def __getitem__(self, key):
+ return self.attr[key]
+
+ def __contains__(self, key):
+ return key in self.attr
+
+ def is_multi_val(self):
+ return None
+
+ def is_scalar(self):
+ return self.type in {'u8', 'u16', 'u32', 'u64', 's32', 's64'}
+
+ def presence_type(self):
+ return 'bit'
+
+ def presence_member(self, space, type_filter):
+ if self.presence_type() != type_filter:
+ return
+
+ if self.presence_type() == 'bit':
+ pfx = '__' if space == 'user' else ''
+ return f"{pfx}u32 {self.c_name}:1;"
+
+ if self.presence_type() == 'len':
+ pfx = '__' if space == 'user' else ''
+ return f"{pfx}u32 {self.c_name}_len;"
+
+ def _complex_member_type(self, ri):
+ return None
+
+ def free_needs_iter(self):
+ return False
+
+ def free(self, ri, var, ref):
+ if self.is_multi_val() or self.presence_type() == 'len':
+ ri.cw.p(f'free({var}->{ref}{self.c_name});')
+
+ def arg_member(self, ri):
+ member = self._complex_member_type(ri)
+ if member:
+ return [member + ' *' + self.c_name]
+ raise Exception(f"Struct member not implemented for class type {self.type}")
+
+ def struct_member(self, ri):
+ if self.is_multi_val():
+ ri.cw.p(f"unsigned int n_{self.c_name};")
+ member = self._complex_member_type(ri)
+ if member:
+ ptr = ''
+ if self. is_multi_val():
+ ptr = '*'
+ ri.cw.p(f"{member} {ptr}{self.c_name};")
+ return
+ members = self.arg_member(ri)
+ for one in members:
+ ri.cw.p(one + ';')
+
+ def _attr_policy(self, policy):
+ return '{ .type = ' + policy + ', }'
+
+ def attr_policy(self, cw):
+ policy = 'NLA_' + self.attr['type'].upper()
+ policy = policy.replace('-', '_')
+
+ spec = self._attr_policy(policy)
+ cw.p(f"\t[{self.enum_name}] = {spec},")
+
+ def _attr_typol(self):
+ raise Exception(f"Type policy not implemented for class type {self.type}")
+
+ def attr_typol(self, cw):
+ typol = self._attr_typol()
+ cw.p(f'[{self.enum_name}] = {"{"} .name = "{self.name}", {typol}{"}"},')
+
+ def _attr_put_line(self, ri, var, line):
+ if self.presence_type() == 'bit':
+ ri.cw.p(f"if ({var}->_present.{self.c_name})")
+ elif self.presence_type() == 'len':
+ ri.cw.p(f"if ({var}->_present.{self.c_name}_len)")
+ ri.cw.p(f"{line};")
+
+ def _attr_put_simple(self, ri, var, put_type):
+ line = f"mnl_attr_put_{put_type}(nlh, {self.enum_name}, {var}->{self.c_name})"
+ self._attr_put_line(ri, var, line)
+
+ def attr_put(self, ri, var):
+ raise Exception(f"Put not implemented for class type {self.type}")
+
+ def _attr_get(self, ri, var):
+ raise Exception(f"Attr get not implemented for class type {self.type}")
+
+ def attr_get(self, ri, var, first):
+ lines, init_lines, local_vars = self._attr_get(ri, var)
+ if type(lines) is str:
+ lines = [lines]
+ if type(init_lines) is str:
+ init_lines = [init_lines]
+
+ kw = 'if' if first else 'else if'
+ ri.cw.block_start(line=f"{kw} (mnl_attr_get_type(attr) == {self.enum_name})")
+ if local_vars:
+ for local in local_vars:
+ ri.cw.p(local)
+ ri.cw.nl()
+
+ if not self.is_multi_val():
+ ri.cw.p(f"if (ynl_attr_validate(yarg, attr))")
+ ri.cw.p(f"return MNL_CB_ERROR;")
+ if self.presence_type() == 'bit':
+ ri.cw.p(f"{var}->_present.{self.c_name} = 1;")
+
+ if init_lines:
+ ri.cw.nl()
+ for line in init_lines:
+ ri.cw.p(line)
+
+ for line in lines:
+ ri.cw.p(line)
+ ri.cw.block_end()
+
+ def _setter_lines(self, ri, member, presence):
+ raise Exception(f"Setter not implemented for class type {self.type}")
+
+ def setter(self, ri, space, direction, deref=False, ref=None):
+ ref = (ref if ref else []) + [self.c_name]
+ var = "req"
+ member = f"{var}->{'.'.join(ref)}"
+
+ code = []
+ presence = ''
+ for i in range(0, len(ref)):
+ presence = f"{var}->{'.'.join(ref[:i] + [''])}_present.{ref[i]}"
+ if self.presence_type() == 'bit':
+ code.append(presence + ' = 1;')
+ code += self._setter_lines(ri, member, presence)
+
+ ri.cw.write_func('static inline void',
+ f"{op_prefix(ri, direction, deref=deref)}_set_{'_'.join(ref)}",
+ body=code,
+ args=[f'{type_name(ri, direction, deref=deref)} *{var}'] + self.arg_member(ri))
+
+
+class TypeUnused(Type):
+ def presence_type(self):
+ return ''
+
+ def _attr_typol(self):
+ return '.type = YNL_PT_REJECT, '
+
+ def attr_policy(self, cw):
+ pass
+
+class TypeScalar(Type):
+ def __init__(self, family, attr_set, attr):
+ super().__init__(family, attr_set, attr)
+
+ if 'enum' in self.attr:
+ self.type_name = f"enum {family.name}_{self.attr['enum'].replace('-', '_')}"
+ else:
+ self.type_name = '__' + self.type
+
+ self.byte_order_comment = ''
+ if 'byte-order' in attr:
+ self.byte_order_comment = f" /* {attr['byte-order']} */"
+
+ def _mnl_type(self):
+ t = self.type
+ # mnl does not have a helper for signed types
+ if t[0] == 's':
+ t = 'u' + t[1:]
+ return t
+
+ def _attr_policy(self, policy):
+ if 'flags-mask' in self.checks:
+ flags = self.family.consts[self.checks['flags-mask']]
+ flag_cnt = len(flags['entries'])
+ return f"NLA_POLICY_MASK({policy}, 0x{(1 << flag_cnt) - 1:x})"
+ elif 'enum' in self.attr:
+ enum = self.family.consts[self.attr['enum']]
+ cnt = len(enum['entries'])
+ return f"NLA_POLICY_MAX({policy}, {cnt})"
+ return super()._attr_policy(policy)
+
+ def _attr_typol(self):
+ return f'.type = YNL_PT_U{self.type[1:]}, '
+
+ def arg_member(self, ri):
+ return [f'{self.type_name} {self.c_name}{self.byte_order_comment}']
+
+ def attr_put(self, ri, var):
+ self._attr_put_simple(ri, var, self._mnl_type())
+
+ def _attr_get(self, ri, var):
+ return f"{var}->{self.c_name} = mnl_attr_get_{self._mnl_type()}(attr);", None, None
+
+ def _setter_lines(self, ri, member, presence):
+ return [f"{member} = {self.c_name};"]
+
+
+class TypeFlag(Type):
+ def arg_member(self, ri):
+ return []
+
+ def _attr_typol(self):
+ return '.type = YNL_PT_FLAG, '
+
+ def attr_put(self, ri, var):
+ self._attr_put_line(ri, var, f"mnl_attr_put(nlh, {self.enum_name}, 0, NULL)")
+
+ def _attr_get(self, ri, var):
+ return [], None, None
+
+ def _setter_lines(self, ri, member, presence):
+ return []
+
+
+class TypeString(Type):
+ def arg_member(self, ri):
+ return [f"const char *{self.c_name}"]
+
+ def presence_type(self):
+ return 'len'
+
+ def struct_member(self, ri):
+ ri.cw.p(f"char *{self.c_name};")
+
+ def _attr_typol(self):
+ return f'.type = YNL_PT_NUL_STR, '
+
+ def _attr_policy(self, policy):
+ mem = '{ .type = ' + policy
+ if 'max-len' in self.checks:
+ mem += ', .len = ' + str(self.checks['max-len'])
+ mem += ', }'
+ return mem
+
+ def attr_policy(self, cw):
+ if 'unterminated-ok' in self.checks and self.checks['unterminated-ok']:
+ policy = 'NLA_STRING'
+ else:
+ policy = 'NLA_NUL_STRING'
+
+ spec = self._attr_policy(policy)
+ cw.p(f"\t[{self.enum_name}] = {spec},")
+
+ def attr_put(self, ri, var):
+ self._attr_put_simple(ri, var, 'strz')
+
+ def _attr_get(self, ri, var):
+ len_mem = var + '->_present.' + self.c_name + '_len'
+ return [f"{len_mem} = len;",
+ f"{var}->{self.c_name} = malloc(len + 1);",
+ f"memcpy({var}->{self.c_name}, mnl_attr_get_str(attr), len);",
+ f"{var}->{self.c_name}[len] = 0;"], \
+ ['len = strnlen(mnl_attr_get_str(attr), mnl_attr_get_payload_len(attr));'], \
+ ['unsigned int len;']
+
+ def _setter_lines(self, ri, member, presence):
+ return [f"free({member});",
+ f"{presence}_len = strlen({self.c_name});",
+ f"{member} = malloc({presence}_len + 1);",
+ f'memcpy({member}, {self.c_name}, {presence}_len);',
+ f'{member}[{presence}_len] = 0;']
+
+
+class TypeBinary(Type):
+ def arg_member(self, ri):
+ return [f"const void *{self.c_name}", 'size_t len']
+
+ def presence_type(self):
+ return 'len'
+
+ def struct_member(self, ri):
+ ri.cw.p(f"void *{self.c_name};")
+
+ def _attr_typol(self):
+ return f'.type = YNL_PT_BINARY,'
+
+ def _attr_policy(self, policy):
+ mem = '{ '
+ if len(self.checks) == 1 and 'min-len' in self.checks:
+ mem += '.len = ' + str(self.checks['min-len'])
+ else:
+ raise Exception('Binary type not implemented, yet')
+ mem += ', }'
+ return mem
+
+ def attr_put(self, ri, var):
+ self._attr_put_line(ri, var, f"mnl_attr_put(nlh, {self.enum_name}, " +
+ f"{var}->_present.{self.c_name}_len, {var}->{self.c_name})")
+
+ def _attr_get(self, ri, var):
+ len_mem = var + '->_present.' + self.c_name + '_len'
+ return [f"{len_mem} = len;",
+ f"{var}->{self.c_name} = malloc(len);",
+ f"memcpy({var}->{self.c_name}, mnl_attr_get_payload(attr), len);"], \
+ ['len = mnl_attr_get_payload_len(attr);'], \
+ ['unsigned int len;']
+
+ def _setter_lines(self, ri, member, presence):
+ return [f"free({member});",
+ f"{member} = malloc({presence}_len);",
+ f'memcpy({member}, {self.c_name}, {presence}_len);']
+
+
+class TypeNest(Type):
+ def _complex_member_type(self, ri):
+ return f"struct {self.nested_render_name}"
+
+ def free(self, ri, var, ref):
+ ri.cw.p(f'{self.nested_render_name}_free(&{var}->{ref}{self.c_name});')
+
+ def _attr_typol(self):
+ return f'.type = YNL_PT_NEST, .nest = &{self.nested_render_name}_nest, '
+
+ def attr_put(self, ri, var):
+ self._attr_put_line(ri, var, f"{self.nested_render_name}_put(nlh, " +
+ f"{self.enum_name}, &{var}->{self.c_name})")
+
+ def _attr_get(self, ri, var):
+ get_lines = [f"{self.nested_render_name}_parse(&parg, attr);"]
+ init_lines = [f"parg.rsp_policy = &{self.nested_render_name}_nest;",
+ f"parg.data = &{var}->{self.c_name};"]
+ return get_lines, init_lines, None
+
+ def setter(self, ri, space, direction, deref=False, ref=None):
+ ref = (ref if ref else []) + [self.c_name]
+
+ for _, attr in ri.family.pure_nested_structs[self.nested_attrs].member_list():
+ attr.setter(ri, self.nested_attrs, direction, deref=deref, ref=ref)
+
+
+class TypeMultiAttr(Type):
+ def is_multi_val(self):
+ return True
+
+ def presence_type(self):
+ return 'count'
+
+ def _complex_member_type(self, ri):
+ if 'type' not in self.attr or self.attr['type'] == 'nest':
+ return f"struct {self.nested_render_name}"
+ elif self.attr['type'] in scalars:
+ scalar_pfx = '__' if ri.ku_space == 'user' else ''
+ return scalar_pfx + self.attr['type']
+ else:
+ raise Exception(f"Sub-type {self.attr['type']} not supported yet")
+
+ def free_needs_iter(self):
+ return 'type' not in self.attr or self.attr['type'] == 'nest'
+
+ def free(self, ri, var, ref):
+ if 'type' not in self.attr or self.attr['type'] == 'nest':
+ ri.cw.p(f"for (i = 0; i < {var}->{ref}n_{self.c_name}; i++)")
+ ri.cw.p(f'{self.nested_render_name}_free(&{var}->{ref}{self.c_name}[i]);')
+
+ def _attr_typol(self):
+ if 'type' not in self.attr or self.attr['type'] == 'nest':
+ return f'.type = YNL_PT_NEST, .nest = &{self.nested_render_name}_nest, '
+ elif self.attr['type'] in scalars:
+ return f".type = YNL_PT_U{self.attr['type'][1:]}, "
+ else:
+ raise Exception(f"Sub-type {self.attr['type']} not supported yet")
+
+ def _attr_get(self, ri, var):
+ return f'{var}->n_{self.c_name}++;', None, None
+
+
+class TypeArrayNest(Type):
+ def is_multi_val(self):
+ return True
+
+ def presence_type(self):
+ return 'count'
+
+ def _complex_member_type(self, ri):
+ if 'sub-type' not in self.attr or self.attr['sub-type'] == 'nest':
+ return f"struct {self.nested_render_name}"
+ elif self.attr['sub-type'] in scalars:
+ scalar_pfx = '__' if ri.ku_space == 'user' else ''
+ return scalar_pfx + self.attr['sub-type']
+ else:
+ raise Exception(f"Sub-type {self.attr['sub-type']} not supported yet")
+
+ def _attr_typol(self):
+ return f'.type = YNL_PT_NEST, .nest = &{self.nested_render_name}_nest, '
+
+ def _attr_get(self, ri, var):
+ local_vars = ['const struct nlattr *attr2;']
+ get_lines = [f'attr_{self.c_name} = attr;',
+ 'mnl_attr_for_each_nested(attr2, attr)',
+ f'\t{var}->n_{self.c_name}++;']
+ return get_lines, None, local_vars
+
+
+class TypeNestTypeValue(Type):
+ def _complex_member_type(self, ri):
+ return f"struct {self.nested_render_name}"
+
+ def _attr_typol(self):
+ return f'.type = YNL_PT_NEST, .nest = &{self.nested_render_name}_nest, '
+
+ def _attr_get(self, ri, var):
+ prev = 'attr'
+ tv_args = ''
+ get_lines = []
+ local_vars = []
+ init_lines = [f"parg.rsp_policy = &{self.nested_render_name}_nest;",
+ f"parg.data = &{var}->{self.c_name};"]
+ if 'type-value' in self.attr:
+ tv_names = [x.replace('-', '_') for x in self.attr["type-value"]]
+ local_vars += [f'const struct nlattr *attr_{", *attr_".join(tv_names)};']
+ local_vars += [f'__u32 {", ".join(tv_names)};']
+ for level in self.attr["type-value"]:
+ level = level.replace('-', '_')
+ get_lines += [f'attr_{level} = mnl_attr_get_payload({prev});']
+ get_lines += [f'{level} = mnl_attr_get_type(attr_{level});']
+ prev = 'attr_' + level
+
+ tv_args = f", {', '.join(tv_names)}"
+
+ get_lines += [f"{self.nested_render_name}_parse(&parg, {prev}{tv_args});"]
+ return get_lines, init_lines, local_vars
+
+
+class Struct:
+ def __init__(self, family, space_name, type_list=None, inherited=None):
+ self.family = family
+ self.space_name = space_name
+ self.attr_set = family.attr_sets[space_name]
+ # Use list to catch comparisons with empty sets
+ self._inherited = inherited if inherited is not None else []
+ self.inherited = []
+
+ self.nested = type_list is None
+ if family.name == space_name.replace('-', '_'):
+ self.render_name = f"{family.name}"
+ else:
+ self.render_name = f"{family.name}_{space_name.replace('-', '_')}"
+ self.struct_name = 'struct ' + self.render_name
+ self.ptr_name = self.struct_name + ' *'
+
+ self.request = False
+ self.reply = False
+
+ self.attr_list = []
+ self.attrs = dict()
+ if type_list:
+ for t in type_list:
+ self.attr_list.append((t, self.attr_set[t]),)
+ else:
+ for t in self.attr_set:
+ self.attr_list.append((t, self.attr_set[t]),)
+
+ max_val = 0
+ self.attr_max_val = None
+ for name, attr in self.attr_list:
+ if attr.value > max_val:
+ max_val = attr.value
+ self.attr_max_val = attr
+ self.attrs[name] = attr
+
+ def __iter__(self):
+ yield from self.attrs
+
+ def __getitem__(self, key):
+ return self.attrs[key]
+
+ def member_list(self):
+ return self.attr_list
+
+ def set_inherited(self, new_inherited):
+ if self._inherited != new_inherited:
+ raise Exception("Inheriting different members not supported")
+ self.inherited = [x.replace('-', '_') for x in sorted(self._inherited)]
+
+
+class AttrSet:
+ def __init__(self, family, yaml):
+ self.yaml = yaml
+
+ self.attrs = dict()
+ self.name = self.yaml['name']
+ if 'subset-of' not in yaml:
+ self.subset_of = None
+ if 'name-prefix' in yaml:
+ pfx = yaml['name-prefix']
+ elif self.name == family.name:
+ pfx = family.name + '-a-'
+ else:
+ pfx = f"{family.name}-a-{self.name}-"
+ self.name_prefix = c_upper(pfx)
+ self.max_name = c_upper(self.yaml.get('attr-max-name', f"{self.name_prefix}max"))
+ else:
+ self.subset_of = self.yaml['subset-of']
+ self.name_prefix = family.attr_sets[self.subset_of].name_prefix
+ self.max_name = family.attr_sets[self.subset_of].max_name
+
+ self.c_name = self.name.replace('-', '_')
+ if self.c_name in c_kw:
+ self.c_name += '_'
+ if self.c_name == family.c_name:
+ self.c_name = ''
+
+ val = 0
+ for elem in self.yaml['attributes']:
+ if 'value' in elem:
+ val = elem['value']
+ else:
+ elem['value'] = val
+ val += 1
+
+ if 'multi-attr' in elem and elem['multi-attr']:
+ attr = TypeMultiAttr(family, self, elem)
+ elif elem['type'] in scalars:
+ attr = TypeScalar(family, self, elem)
+ elif elem['type'] == 'unused':
+ attr = TypeUnused(family, self, elem)
+ elif elem['type'] == 'flag':
+ attr = TypeFlag(family, self, elem)
+ elif elem['type'] == 'string':
+ attr = TypeString(family, self, elem)
+ elif elem['type'] == 'binary':
+ attr = TypeBinary(family, self, elem)
+ elif elem['type'] == 'nest':
+ attr = TypeNest(family, self, elem)
+ elif elem['type'] == 'array-nest':
+ attr = TypeArrayNest(family, self, elem)
+ elif elem['type'] == 'nest-type-value':
+ attr = TypeNestTypeValue(family, self, elem)
+ else:
+ raise Exception(f"No typed class for type {elem['type']}")
+
+ self.attrs[elem['name']] = attr
+
+ def __getitem__(self, key):
+ return self.attrs[key]
+
+ def __contains__(self, key):
+ return key in self.yaml
+
+ def __iter__(self):
+ yield from self.attrs
+
+ def items(self):
+ return self.attrs.items()
+
+
+class Operation:
+ def __init__(self, family, yaml, value):
+ self.yaml = yaml
+ self.value = value
+
+ self.name = self.yaml['name']
+ self.render_name = family.name + '_' + self.name.replace('-', '_')
+ self.is_async = 'notify' in yaml or 'event' in yaml
+ if not self.is_async:
+ self.enum_name = family.op_prefix + self.name.upper().replace('-', '_')
+ else:
+ self.enum_name = family.async_op_prefix + self.name.upper().replace('-', '_')
+
+ def __getitem__(self, key):
+ return self.yaml[key]
+
+ def __contains__(self, key):
+ return key in self.yaml
+
+ def add_notification(self, op):
+ if 'notify' not in self.yaml:
+ self.yaml['notify'] = dict()
+ self.yaml['notify']['reply'] = self.yaml['do']['reply']
+ self.yaml['notify']['cmds'] = []
+ self.yaml['notify']['cmds'].append(op)
+
+
+class Family:
+ def __init__(self, file_name):
+ with open(file_name, "r") as stream:
+ self.yaml = yaml.safe_load(stream)
+
+ proto = self.yaml.get('protocol', 'genetlink')
+
+ with open(os.path.dirname(os.path.dirname(file_name)) + f'/{proto}.yaml', "r") as stream:
+ schema = yaml.safe_load(stream)
+
+ jsonschema.validate(self.yaml, schema)
+
+ if self.yaml.get('protocol', 'genetlink') not in {'genetlink', 'genetlink-c', 'genetlink-legacy'}:
+ raise Exception("Codegen only supported for genetlink")
+
+ if 'definitions' not in self.yaml:
+ self.yaml['definitions'] = []
+
+ self.name = self.yaml['name']
+ self.c_name = self.name.replace('-', '_')
+ if 'uapi-header' in self.yaml:
+ self.uapi_header = self.yaml['uapi-header']
+ else:
+ self.uapi_header = f"linux/{self.name}.h"
+ if 'name-prefix' in self.yaml['operations']:
+ self.op_prefix = self.yaml['operations']['name-prefix'].upper().replace('-', '_')
+ else:
+ self.op_prefix = (self.yaml['name'] + '-cmd-').upper().replace('-', '_')
+ if 'async-prefix' in self.yaml['operations']:
+ self.async_op_prefix = self.yaml['operations']['async-prefix'].upper().replace('-', '_')
+ else:
+ self.async_op_prefix = self.op_prefix
+
+ self.consts = dict()
+ self.ops = dict()
+ self.ops_list = []
+ self.attr_sets = dict()
+ self.attr_sets_list = []
+
+ # dict space-name -> 'request': set(attrs), 'reply': set(attrs)
+ self.root_sets = dict()
+ # dict space-name -> set('request', 'reply')
+ self.pure_nested_structs = dict()
+ self.all_notify = dict()
+
+ self._mock_up_events()
+
+ self._dictify()
+ self._load_root_sets()
+ self._load_nested_sets()
+ self._load_all_notify()
+
+ self.kernel_policy = self.yaml.get('kernel-policy', 'per-op')
+ if self.kernel_policy == 'global':
+ self._load_global_policy()
+
+ def __getitem__(self, key):
+ return self.yaml[key]
+
+ def get(self, key, default=None):
+ return self.yaml.get(key, default)
+
+ # Fake a 'do' equivalent of all events, so that we can render their response parsing
+ def _mock_up_events(self):
+ for op in self.yaml['operations']['list']:
+ if 'event' in op:
+ op['do'] = {
+ 'reply': {
+ 'attributes': op['event']['attributes']
+ }
+ }
+
+ def _dictify(self):
+ for elem in self.yaml['definitions']:
+ self.consts[elem['name']] = elem
+
+ for elem in self.yaml['attribute-sets']:
+ attr_set = AttrSet(self, elem)
+ self.attr_sets[elem['name']] = attr_set
+ self.attr_sets_list.append((elem['name'], attr_set), )
+
+ ntf = []
+ val = 0
+ for elem in self.yaml['operations']['list']:
+ if 'value' in elem:
+ val = elem['value']
+
+ op = Operation(self, elem, val)
+ val += 1
+
+ self.ops_list.append((elem['name'], op),)
+ if 'notify' in elem:
+ ntf.append(op)
+ continue
+ if 'attribute-set' not in elem:
+ continue
+ self.ops[elem['name']] = op
+ for n in ntf:
+ self.ops[n['notify']].add_notification(n)
+
+ def _load_root_sets(self):
+ for op_name, op in self.ops.items():
+ if 'attribute-set' not in op:
+ continue
+
+ req_attrs = set()
+ rsp_attrs = set()
+ for op_mode in ['do', 'dump']:
+ if op_mode in op and 'request' in op[op_mode]:
+ req_attrs.update(set(op[op_mode]['request']['attributes']))
+ if op_mode in op and 'reply' in op[op_mode]:
+ rsp_attrs.update(set(op[op_mode]['reply']['attributes']))
+
+ if op['attribute-set'] not in self.root_sets:
+ self.root_sets[op['attribute-set']] = {'request': req_attrs, 'reply': rsp_attrs}
+ else:
+ self.root_sets[op['attribute-set']]['request'].update(req_attrs)
+ self.root_sets[op['attribute-set']]['reply'].update(rsp_attrs)
+
+ def _load_nested_sets(self):
+ for root_set, rs_members in self.root_sets.items():
+ for attr, spec in self.attr_sets[root_set].items():
+ if 'nested-attributes' in spec:
+ inherit = set()
+ nested = spec['nested-attributes']
+ if nested not in self.root_sets:
+ self.pure_nested_structs[nested] = Struct(self, nested, inherited=inherit)
+ if attr in rs_members['request']:
+ self.pure_nested_structs[nested].request = True
+ if attr in rs_members['reply']:
+ self.pure_nested_structs[nested].reply = True
+
+ if 'type-value' in spec:
+ if nested in self.root_sets:
+ raise Exception("Inheriting members to a space used as root not supported")
+ inherit.update(set(spec['type-value']))
+ elif spec['type'] == 'array-nest':
+ inherit.add('idx')
+ self.pure_nested_structs[nested].set_inherited(inherit)
+
+ def _load_all_notify(self):
+ for op_name, op in self.ops.items():
+ if not op:
+ continue
+
+ if 'notify' in op:
+ self.all_notify[op_name] = op['notify']['cmds']
+
+ def _load_global_policy(self):
+ global_set = set()
+ attr_set_name = None
+ for op_name, op in self.ops.items():
+ if not op:
+ continue
+ if 'attribute-set' not in op:
+ continue
+
+ if attr_set_name is None:
+ attr_set_name = op['attribute-set']
+ if attr_set_name != op['attribute-set']:
+ raise Exception('For a global policy all ops must use the same set')
+
+ for op_mode in {'do', 'dump'}:
+ if op_mode in op:
+ global_set.update(op[op_mode].get('request', []))
+
+ self.global_policy = []
+ self.global_policy_set = attr_set_name
+ for attr in self.attr_sets[attr_set_name]:
+ if attr in global_set:
+ self.global_policy.append(attr)
+
+
+class RenderInfo:
+ def __init__(self, cw, family, ku_space, op, op_name, op_mode, attr_set=None):
+ self.family = family
+ self.nl = cw.nlib
+ self.ku_space = ku_space
+ self.op = op
+ self.op_name = op_name
+ self.op_mode = op_mode
+
+ # 'do' and 'dump' response parsing is identical
+ if op_mode != 'do' and 'dump' in op and 'do' in op and 'reply' in op['do'] and \
+ op["do"]["reply"] == op["dump"]["reply"]:
+ self.type_consistent = True
+ else:
+ self.type_consistent = op_mode == 'event'
+
+ self.attr_set = attr_set
+ if not self.attr_set:
+ self.attr_set = op['attribute-set']
+
+ if op:
+ self.type_name = op_name.replace('-', '_')
+ else:
+ self.type_name = attr_set.replace('-', '_')
+
+ self.cw = cw
+
+ self.struct = dict()
+ for op_dir in ['request', 'reply']:
+ if op and op_dir in op[op_mode]:
+ self.struct[op_dir] = Struct(family, self.attr_set,
+ type_list=op[op_mode][op_dir]['attributes'])
+ if op_mode == 'event':
+ self.struct['reply'] = Struct(family, self.attr_set, type_list=op['event']['attributes'])
+
+
+class CodeWriter:
+ def __init__(self, nlib):
+ self.nlib = nlib
+
+ self._nl = False
+ self._silent_block = False
+ self._ind = 0
+
+ @classmethod
+ def _is_cond(cls, line):
+ return line.startswith('if') or line.startswith('while') or line.startswith('for')
+
+ def p(self, line, add_ind=0):
+ if self._nl:
+ print()
+ self._nl = False
+ ind = self._ind
+ if line[-1] == ':':
+ ind -= 1
+ if self._silent_block:
+ ind += 1
+ self._silent_block = line.endswith(')') and CodeWriter._is_cond(line)
+ if add_ind:
+ ind += add_ind
+ print('\t' * ind + line)
+
+ def nl(self):
+ self._nl = True
+
+ def block_start(self, line=''):
+ if line:
+ line = line + ' '
+ self.p(line + '{')
+ self._ind += 1
+
+ def block_end(self, line=''):
+ if line and line[0] not in {';', ','}:
+ line = ' ' + line
+ self._ind -= 1
+ self.p('}' + line)
+
+ def write_func_prot(self, qual_ret, name, args=None, doc=None, suffix=''):
+ if not args:
+ args = ['void']
+
+ if doc:
+ self.p('/*')
+ self.p(' * ' + doc)
+ self.p(' */')
+
+ oneline = qual_ret
+ if qual_ret[-1] != '*':
+ oneline += ' '
+ oneline += f"{name}({', '.join(args)}){suffix}"
+
+ if len(oneline) < 80:
+ self.p(oneline)
+ return
+
+ v = qual_ret
+ if len(v) > 3:
+ self.p(v)
+ v = ''
+ elif qual_ret[-1] != '*':
+ v += ' '
+ v += name + '('
+ ind = '\t' * (len(v) // 8) + ' ' * (len(v) % 8)
+ delta_ind = len(v) - len(ind)
+ v += args[0]
+ i = 1
+ while i < len(args):
+ next_len = len(v) + len(args[i])
+ if v[0] == '\t':
+ next_len += delta_ind
+ if next_len > 76:
+ self.p(v + ',')
+ v = ind
+ else:
+ v += ', '
+ v += args[i]
+ i += 1
+ self.p(v + ')' + suffix)
+
+ def write_func_lvar(self, local_vars):
+ if not local_vars:
+ return
+
+ if type(local_vars) is str:
+ local_vars = [local_vars]
+
+ local_vars.sort(key=len, reverse=True)
+ for var in local_vars:
+ self.p(var)
+ self.nl()
+
+ def write_func(self, qual_ret, name, body, args=None, local_vars=None):
+ self.write_func_prot(qual_ret=qual_ret, name=name, args=args)
+ self.write_func_lvar(local_vars=local_vars)
+
+ self.block_start()
+ for line in body:
+ self.p(line)
+ self.block_end()
+
+ def writes_defines(self, defines):
+ longest = 0
+ for define in defines:
+ if len(define[0]) > longest:
+ longest = len(define[0])
+ longest = ((longest + 8) // 8) * 8
+ for define in defines:
+ line = '#define ' + define[0]
+ line += '\t' * ((longest - len(define[0]) + 7) // 8)
+ if type(define[1]) is int:
+ line += str(define[1])
+ elif type(define[1]) is str:
+ line += '"' + define[1] + '"'
+ self.p(line)
+
+
+scalars = {'u8', 'u16', 'u32', 'u64', 's32', 's64'}
+
+direction_to_suffix = {
+ 'reply': '_rsp',
+ 'request': '_req',
+ '': ''
+}
+
+op_mode_to_wrapper = {
+ 'do': '',
+ 'dump': '_list',
+ 'notify': '_ntf',
+ 'event': '',
+}
+
+c_kw = {
+ 'do'
+}
+
+
+def rdir(direction):
+ if direction == 'reply':
+ return 'request'
+ if direction == 'request':
+ return 'reply'
+ return direction
+
+
+def op_prefix(ri, direction, deref=False):
+ suffix = f"_{ri.type_name}"
+
+ if not ri.op_mode or ri.op_mode == 'do':
+ suffix += f"{direction_to_suffix[direction]}"
+ else:
+ if direction == 'request':
+ suffix += '_req_dump'
+ else:
+ if ri.type_consistent:
+ if deref:
+ suffix += f"{direction_to_suffix[direction]}"
+ else:
+ suffix += op_mode_to_wrapper[ri.op_mode]
+ else:
+ suffix += '_rsp'
+ suffix += '_dump' if deref else '_list'
+
+ return f"{ri.family['name']}{suffix}"
+
+
+def type_name(ri, direction, deref=False):
+ return f"struct {op_prefix(ri, direction, deref=deref)}"
+
+
+def print_prototype(ri, direction, terminate=True, doc=None):
+ suffix = ';' if terminate else ''
+
+ fname = ri.op.render_name
+ if ri.op_mode == 'dump':
+ fname += '_dump'
+
+ args = ['struct ynl_sock *ys']
+ if 'request' in ri.op[ri.op_mode]:
+ args.append(f"{type_name(ri, direction)} *" + f"{direction_to_suffix[direction][1:]}")
+
+ ret = 'int'
+ if 'reply' in ri.op[ri.op_mode]:
+ ret = f"{type_name(ri, rdir(direction))} *"
+
+ ri.cw.write_func_prot(ret, fname, args, doc=doc, suffix=suffix)
+
+
+def print_req_prototype(ri):
+ print_prototype(ri, "request", doc=ri.op['doc'])
+
+
+def print_dump_prototype(ri):
+ print_prototype(ri, "request")
+
+
+def put_typol_fwd(cw, struct):
+ cw.p(f'extern struct ynl_policy_nest {struct.render_name}_nest;')
+
+
+def put_typol(cw, struct):
+ type_max = struct.attr_set.max_name
+ cw.block_start(line=f'struct ynl_policy_attr {struct.render_name}_policy[{type_max} + 1] =')
+
+ for _, arg in struct.member_list():
+ arg.attr_typol(cw)
+
+ cw.block_end(line=';')
+ cw.nl()
+
+ cw.block_start(line=f'struct ynl_policy_nest {struct.render_name}_nest =')
+ cw.p(f'.max_attr = {type_max},')
+ cw.p(f'.table = {struct.render_name}_policy,')
+ cw.block_end(line=';')
+ cw.nl()
+
+
+def put_req_nested(ri, struct):
+ func_args = ['struct nlmsghdr *nlh',
+ 'unsigned int attr_type',
+ f'{struct.ptr_name}obj']
+
+ ri.cw.write_func_prot('int', f'{struct.render_name}_put', func_args)
+ ri.cw.block_start()
+ ri.cw.write_func_lvar('struct nlattr *nest;')
+
+ ri.cw.p("nest = mnl_attr_nest_start(nlh, attr_type);")
+
+ for _, arg in struct.member_list():
+ arg.attr_put(ri, "obj")
+
+ ri.cw.p("mnl_attr_nest_end(nlh, nest);")
+
+ ri.cw.nl()
+ ri.cw.p('return 0;')
+ ri.cw.block_end()
+ ri.cw.nl()
+
+
+def _multi_parse(ri, struct, init_lines, local_vars):
+ if struct.nested:
+ iter_line = "mnl_attr_for_each_nested(attr, nested)"
+ else:
+ iter_line = "mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr))"
+
+ array_nests = set()
+ multi_attrs = set()
+ needs_parg = False
+ for arg, aspec in struct.member_list():
+ if aspec['type'] == 'array-nest':
+ local_vars.append(f'const struct nlattr *attr_{aspec.c_name};')
+ array_nests.add(arg)
+ if 'multi-attr' in aspec:
+ multi_attrs.add(arg)
+ needs_parg |= 'nested-attributes' in aspec
+ if array_nests or multi_attrs:
+ local_vars.append('int i;')
+ if needs_parg:
+ local_vars.append('struct ynl_parse_arg parg;')
+ init_lines.append('parg.ys = yarg->ys;')
+
+ ri.cw.block_start()
+ ri.cw.write_func_lvar(local_vars)
+
+ for line in init_lines:
+ ri.cw.p(line)
+ ri.cw.nl()
+
+ for arg in struct.inherited:
+ ri.cw.p(f'dst->{arg} = {arg};')
+
+ ri.cw.nl()
+ ri.cw.block_start(line=iter_line)
+
+ first = True
+ for _, arg in struct.member_list():
+ arg.attr_get(ri, 'dst', first=first)
+ first = False
+
+ ri.cw.block_end()
+ ri.cw.nl()
+
+ for anest in sorted(array_nests):
+ aspec = struct[anest]
+
+ ri.cw.block_start(line=f"if (dst->n_{aspec.c_name})")
+ ri.cw.p(f"dst->{aspec.c_name} = calloc(dst->n_{aspec.c_name}, sizeof(*dst->{aspec.c_name}));")
+ ri.cw.p('i = 0;')
+ ri.cw.p(f"parg.rsp_policy = &{aspec.nested_render_name}_nest;")
+ ri.cw.block_start(line=f"mnl_attr_for_each_nested(attr, attr_{aspec.c_name})")
+ ri.cw.p(f"parg.data = &dst->{aspec.c_name}[i];")
+ ri.cw.p(f"if ({aspec.nested_render_name}_parse(&parg, attr, mnl_attr_get_type(attr)))")
+ ri.cw.p('return MNL_CB_ERROR;')
+ ri.cw.p('i++;')
+ ri.cw.block_end()
+ ri.cw.block_end()
+ ri.cw.nl()
+
+ for anest in sorted(multi_attrs):
+ aspec = struct[anest]
+ ri.cw.block_start(line=f"if (dst->n_{aspec.c_name})")
+ ri.cw.p(f"dst->{aspec.c_name} = calloc(dst->n_{aspec.c_name}, sizeof(*dst->{aspec.c_name}));")
+ ri.cw.p('i = 0;')
+ if 'nested-attributes' in aspec:
+ ri.cw.p(f"parg.rsp_policy = &{aspec.nested_render_name}_nest;")
+ ri.cw.block_start(line=iter_line)
+ ri.cw.block_start(line=f"if (mnl_attr_get_type(attr) == {aspec.enum_name})")
+ if 'nested-attributes' in aspec:
+ ri.cw.p(f"parg.data = &dst->{aspec.c_name}[i];")
+ ri.cw.p(f"if ({aspec.nested_render_name}_parse(&parg, attr))")
+ ri.cw.p('return MNL_CB_ERROR;')
+ elif aspec['type'] in scalars:
+ t = aspec['type']
+ if t[0] == 's':
+ t = 'u' + t[1:]
+ ri.cw.p(f"dst->{aspec.c_name}[i] = mnl_attr_get_{t}(attr);")
+ else:
+ raise Exception('Nest parsing type not supported yet')
+ ri.cw.p('i++;')
+ ri.cw.block_end()
+ ri.cw.block_end()
+ ri.cw.block_end()
+ ri.cw.nl()
+
+ if struct.nested:
+ ri.cw.p('return 0;')
+ else:
+ ri.cw.p('return MNL_CB_OK;')
+ ri.cw.block_end()
+ ri.cw.nl()
+
+
+def parse_rsp_nested(ri, struct):
+ func_args = ['struct ynl_parse_arg *yarg',
+ 'const struct nlattr *nested']
+ for arg in struct.inherited:
+ func_args.append('__u32 ' + arg)
+
+ local_vars = ['const struct nlattr *attr;',
+ f'{struct.ptr_name}dst = yarg->data;']
+ init_lines = []
+
+ ri.cw.write_func_prot('int', f'{struct.render_name}_parse', func_args)
+
+ _multi_parse(ri, struct, init_lines, local_vars)
+
+
+def parse_rsp_msg(ri, deref=False):
+ if 'reply' not in ri.op[ri.op_mode] and ri.op_mode != 'event':
+ return
+
+ func_args = ['const struct nlmsghdr *nlh',
+ 'void *data']
+
+ local_vars = [f'{type_name(ri, "reply", deref=deref)} *dst;',
+ 'struct ynl_parse_arg *yarg = data;',
+ 'const struct nlattr *attr;']
+ init_lines = ['dst = yarg->data;']
+
+ ri.cw.write_func_prot('int', f'{op_prefix(ri, "reply", deref=deref)}_parse', func_args)
+
+ _multi_parse(ri, ri.struct["reply"], init_lines, local_vars)
+
+
+def print_req(ri):
+ ret_ok = '0'
+ ret_err = '-1'
+ direction = "request"
+ local_vars = ['struct nlmsghdr *nlh;',
+ 'int len, err;']
+
+ if 'reply' in ri.op[ri.op_mode]:
+ ret_ok = 'rsp'
+ ret_err = 'NULL'
+ local_vars += [f'{type_name(ri, rdir(direction))} *rsp;',
+ 'struct ynl_parse_arg yarg = { .ys = ys, };']
+
+ print_prototype(ri, direction, terminate=False)
+ ri.cw.block_start()
+ ri.cw.write_func_lvar(local_vars)
+
+ ri.cw.p(f"nlh = ynl_gemsg_start_req(ys, {ri.nl.get_family_id()}, {ri.op.enum_name}, 1);")
+
+ ri.cw.p(f"ys->req_policy = &{ri.struct['request'].render_name}_nest;")
+ if 'reply' in ri.op[ri.op_mode]:
+ ri.cw.p(f"yarg.rsp_policy = &{ri.struct['reply'].render_name}_nest;")
+ ri.cw.nl()
+ for _, attr in ri.struct["request"].member_list():
+ attr.attr_put(ri, "req")
+ ri.cw.nl()
+
+ ri.cw.p('err = mnl_socket_sendto(ys->sock, nlh, nlh->nlmsg_len);')
+ ri.cw.p('if (err < 0)')
+ ri.cw.p(f"return {ret_err};")
+ ri.cw.nl()
+ ri.cw.p('len = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);')
+ ri.cw.p('if (len < 0)')
+ ri.cw.p(f"return {ret_err};")
+ ri.cw.nl()
+
+ if 'reply' in ri.op[ri.op_mode]:
+ ri.cw.p('rsp = calloc(1, sizeof(*rsp));')
+ ri.cw.p('yarg.data = rsp;')
+ ri.cw.nl()
+ ri.cw.p(f"err = {ri.nl.parse_cb_run(op_prefix(ri, 'reply') + '_parse', '&yarg', False)};")
+ ri.cw.p('if (err < 0)')
+ ri.cw.p('goto err_free;')
+ ri.cw.nl()
+
+ ri.cw.p('err = ynl_recv_ack(ys, err);')
+ ri.cw.p('if (err)')
+ ri.cw.p('goto err_free;')
+ ri.cw.nl()
+ ri.cw.p(f"return {ret_ok};")
+ ri.cw.nl()
+ ri.cw.p('err_free:')
+
+ if 'reply' in ri.op[ri.op_mode]:
+ ri.cw.p(f"{call_free(ri, rdir(direction), 'rsp')}")
+ ri.cw.p(f"return {ret_err};")
+ ri.cw.block_end()
+
+
+def print_dump(ri):
+ direction = "request"
+ print_prototype(ri, direction, terminate=False)
+ ri.cw.block_start()
+ local_vars = ['struct ynl_dump_state yds = {};',
+ 'struct nlmsghdr *nlh;',
+ 'int len, err;']
+
+ for var in local_vars:
+ ri.cw.p(f'{var}')
+ ri.cw.nl()
+
+ ri.cw.p('yds.ys = ys;')
+ ri.cw.p(f"yds.alloc_sz = sizeof({type_name(ri, rdir(direction))});")
+ ri.cw.p(f"yds.cb = {op_prefix(ri, 'reply', deref=True)}_parse;")
+ ri.cw.p(f"yds.rsp_policy = &{ri.struct['reply'].render_name}_nest;")
+ ri.cw.nl()
+ ri.cw.p(f"nlh = ynl_gemsg_start_dump(ys, {ri.nl.get_family_id()}, {ri.op.enum_name}, 1);")
+
+ if "request" in ri.op[ri.op_mode]:
+ ri.cw.p(f"ys->req_policy = &{ri.struct['request'].render_name}_nest;")
+ ri.cw.nl()
+ for _, attr in ri.struct["request"].member_list():
+ attr.attr_put(ri, "req")
+ ri.cw.nl()
+
+ ri.cw.p('err = mnl_socket_sendto(ys->sock, nlh, nlh->nlmsg_len);')
+ ri.cw.p('if (err < 0)')
+ ri.cw.p('return NULL;')
+ ri.cw.nl()
+
+ ri.cw.block_start(line='do')
+ ri.cw.p('len = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);')
+ ri.cw.p('if (len < 0)')
+ ri.cw.p('goto free_list;')
+ ri.cw.nl()
+ ri.cw.p(f"err = {ri.nl.parse_cb_run('ynl_dump_trampoline', '&yds', False, indent=2)};")
+ ri.cw.p('if (err < 0)')
+ ri.cw.p('goto free_list;')
+ ri.cw.block_end(line='while (err > 0);')
+ ri.cw.nl()
+
+ ri.cw.p('return yds.first;')
+ ri.cw.nl()
+ ri.cw.p('free_list:')
+ ri.cw.p(call_free(ri, rdir(direction), 'yds.first'))
+ ri.cw.p('return NULL;')
+ ri.cw.block_end()
+
+
+def call_free(ri, direction, var):
+ return f"{op_prefix(ri, direction)}_free({var});"
+
+
+def free_arg_name(direction):
+ if direction:
+ return direction_to_suffix[direction][1:]
+ return 'obj'
+
+
+def print_free_prototype(ri, direction, suffix=';'):
+ name = op_prefix(ri, direction)
+ arg = free_arg_name(direction)
+ ri.cw.write_func_prot('void', f"{name}_free", [f"struct {name} *{arg}"], suffix=suffix)
+
+
+def _print_type(ri, direction, struct):
+ suffix = f'_{ri.type_name}{direction_to_suffix[direction]}'
+
+ if ri.op_mode == 'dump':
+ suffix += '_dump'
+
+ ri.cw.block_start(line=f"struct {ri.family['name']}{suffix}")
+
+ meta_started = False
+ for _, attr in struct.member_list():
+ for type_filter in ['len', 'bit']:
+ line = attr.presence_member(ri.ku_space, type_filter)
+ if line:
+ if not meta_started:
+ ri.cw.block_start(line=f"struct")
+ meta_started = True
+ ri.cw.p(line)
+ if meta_started:
+ ri.cw.block_end(line='_present;')
+ ri.cw.nl()
+
+ for arg in struct.inherited:
+ ri.cw.p(f"__u32 {arg};")
+
+ for _, attr in struct.member_list():
+ attr.struct_member(ri)
+
+ ri.cw.block_end(line=';')
+ ri.cw.nl()
+
+
+def print_type(ri, direction):
+ _print_type(ri, direction, ri.struct[direction])
+
+
+def print_type_full(ri, struct):
+ _print_type(ri, "", struct)
+
+
+def print_type_helpers(ri, direction, deref=False):
+ print_free_prototype(ri, direction)
+
+ if ri.ku_space == 'user' and direction == 'request':
+ for _, attr in ri.struct[direction].member_list():
+ attr.setter(ri, ri.attr_set, direction, deref=deref)
+ ri.cw.nl()
+
+
+def print_req_type_helpers(ri):
+ print_type_helpers(ri, "request")
+
+
+def print_rsp_type_helpers(ri):
+ if 'reply' not in ri.op[ri.op_mode]:
+ return
+ print_type_helpers(ri, "reply")
+
+
+def print_parse_prototype(ri, direction, terminate=True):
+ suffix = "_rsp" if direction == "reply" else "_req"
+ term = ';' if terminate else ''
+
+ ri.cw.write_func_prot('void', f"{ri.op.render_name}{suffix}_parse",
+ ['const struct nlattr **tb',
+ f"struct {ri.op.render_name}{suffix} *req"],
+ suffix=term)
+
+
+def print_req_type(ri):
+ print_type(ri, "request")
+
+
+def print_rsp_type(ri):
+ if (ri.op_mode == 'do' or ri.op_mode == 'dump') and 'reply' in ri.op[ri.op_mode]:
+ direction = 'reply'
+ elif ri.op_mode == 'event':
+ direction = 'reply'
+ else:
+ return
+ print_type(ri, direction)
+
+
+def print_wrapped_type(ri):
+ ri.cw.block_start(line=f"{type_name(ri, 'reply')}")
+ if ri.op_mode == 'dump':
+ ri.cw.p(f"{type_name(ri, 'reply')} *next;")
+ elif ri.op_mode == 'notify' or ri.op_mode == 'event':
+ ri.cw.p('__u16 family;')
+ ri.cw.p('__u8 cmd;')
+ ri.cw.p(f"void (*free)({type_name(ri, 'reply')} *ntf);")
+ ri.cw.p(f"{type_name(ri, 'reply', deref=True)} obj __attribute__ ((aligned (8)));")
+ ri.cw.block_end(line=';')
+ ri.cw.nl()
+ print_free_prototype(ri, 'reply')
+ ri.cw.nl()
+
+
+def _free_type_members_iter(ri, struct):
+ for _, attr in struct.member_list():
+ if attr.free_needs_iter():
+ ri.cw.p('unsigned int i;')
+ ri.cw.nl()
+ break
+
+
+def _free_type_members(ri, var, struct, ref=''):
+ for _, attr in struct.member_list():
+ attr.free(ri, var, ref)
+
+
+def _free_type(ri, direction, struct):
+ var = free_arg_name(direction)
+
+ print_free_prototype(ri, direction, suffix='')
+ ri.cw.block_start()
+ _free_type_members_iter(ri, struct)
+ _free_type_members(ri, var, struct)
+ if direction:
+ ri.cw.p(f'free({var});')
+ ri.cw.block_end()
+ ri.cw.nl()
+
+
+def free_rsp_nested(ri, struct):
+ _free_type(ri, "", struct)
+
+
+def print_rsp_free(ri):
+ if 'reply' not in ri.op[ri.op_mode]:
+ return
+ _free_type(ri, 'reply', ri.struct['reply'])
+
+
+def print_dump_type_free(ri):
+ sub_type = type_name(ri, 'reply')
+
+ print_free_prototype(ri, 'reply', suffix='')
+ ri.cw.block_start()
+ ri.cw.p(f"{sub_type} *next = rsp;")
+ ri.cw.nl()
+ ri.cw.block_start(line='while (next)')
+ _free_type_members_iter(ri, ri.struct['reply'])
+ ri.cw.p('rsp = next;')
+ ri.cw.p('next = rsp->next;')
+ ri.cw.nl()
+
+ _free_type_members(ri, 'rsp', ri.struct['reply'], ref='obj.')
+ ri.cw.p(f'free(rsp);')
+ ri.cw.block_end()
+ ri.cw.block_end()
+ ri.cw.nl()
+
+
+def print_ntf_type_free(ri):
+ print_free_prototype(ri, 'reply', suffix='')
+ ri.cw.block_start()
+ _free_type_members_iter(ri, ri.struct['reply'])
+ _free_type_members(ri, 'rsp', ri.struct['reply'], ref='obj.')
+ ri.cw.p(f'free(rsp);')
+ ri.cw.block_end()
+ ri.cw.nl()
+
+
+def print_ntf_parse_prototype(family, cw, suffix=';'):
+ cw.write_func_prot('struct ynl_ntf_base_type *', f"{family['name']}_ntf_parse",
+ ['struct ynl_sock *ys'], suffix=suffix)
+
+
+def print_ntf_type_parse(family, cw, ku_mode):
+ print_ntf_parse_prototype(family, cw, suffix='')
+ cw.block_start()
+ cw.write_func_lvar(['struct genlmsghdr *genlh;',
+ 'struct nlmsghdr *nlh;',
+ 'struct ynl_parse_arg yarg = { .ys = ys, };',
+ 'struct ynl_ntf_base_type *rsp;',
+ 'int len, err;',
+ 'mnl_cb_t parse;'])
+ cw.p('len = mnl_socket_recvfrom(ys->sock, ys->rx_buf, MNL_SOCKET_BUFFER_SIZE);')
+ cw.p('if (len < (ssize_t)(sizeof(*nlh) + sizeof(*genlh)))')
+ cw.p('return NULL;')
+ cw.nl()
+ cw.p('nlh = (struct nlmsghdr *)ys->rx_buf;')
+ cw.p('genlh = mnl_nlmsg_get_payload(nlh);')
+ cw.nl()
+ cw.block_start(line='switch (genlh->cmd)')
+ for ntf_op in sorted(family.all_notify.keys()):
+ op = family.ops[ntf_op]
+ ri = RenderInfo(cw, family, ku_mode, op, ntf_op, "notify")
+ for ntf in op['notify']['cmds']:
+ cw.p(f"case {ntf.enum_name}:")
+ cw.p(f"rsp = calloc(1, sizeof({type_name(ri, 'notify')}));")
+ cw.p(f"parse = {op_prefix(ri, 'reply', deref=True)}_parse;")
+ cw.p(f"yarg.rsp_policy = &{ri.struct['reply'].render_name}_nest;")
+ cw.p(f"rsp->free = (void *){op_prefix(ri, 'notify')}_free;")
+ cw.p('break;')
+ for op_name, op in family.ops.items():
+ if 'event' not in op:
+ continue
+ ri = RenderInfo(cw, family, ku_mode, op, op_name, "event")
+ cw.p(f"case {op.enum_name}:")
+ cw.p(f"rsp = calloc(1, sizeof({type_name(ri, 'event')}));")
+ cw.p(f"parse = {op_prefix(ri, 'reply', deref=True)}_parse;")
+ cw.p(f"yarg.rsp_policy = &{ri.struct['reply'].render_name}_nest;")
+ cw.p(f"rsp->free = (void *){op_prefix(ri, 'notify')}_free;")
+ cw.p('break;')
+ cw.p('default:')
+ cw.p('ynl_error_unknown_notification(ys, genlh->cmd);')
+ cw.p('return NULL;')
+ cw.block_end()
+ cw.nl()
+ cw.p('yarg.data = rsp->data;')
+ cw.nl()
+ cw.p(f"err = {cw.nlib.parse_cb_run('parse', '&yarg', True)};")
+ cw.p('if (err < 0)')
+ cw.p('goto err_free;')
+ cw.nl()
+ cw.p('rsp->family = nlh->nlmsg_type;')
+ cw.p('rsp->cmd = genlh->cmd;')
+ cw.p('return rsp;')
+ cw.nl()
+ cw.p('err_free:')
+ cw.p('free(rsp);')
+ cw.p('return NULL;')
+ cw.block_end()
+ cw.nl()
+
+
+def print_req_policy_fwd(cw, struct, op=None, terminate=True):
+ prefix = 'extern ' if terminate else ''
+ suffix = ';' if terminate else ' = {'
+ max_attr = struct.attr_max_val
+ name = op.render_name if op else struct.render_name
+ cw.p(f"{prefix}const struct nla_policy {name}_policy[{max_attr.enum_name} + 1]{suffix}")
+
+
+def print_req_policy(cw, struct, op=None):
+ print_req_policy_fwd(cw, struct, op=op, terminate=False)
+ for _, arg in struct.member_list():
+ arg.attr_policy(cw)
+ cw.p("};")
+
+
+def print_kernel_op_table_fwd(family, cw, terminate=True):
+ cw.p(f"// Ops table for {family.name}")
+
+ struct_type = 'genl_small_ops' if family.kernel_policy == 'global' else 'genl_ops'
+ cnt = len(family.ops)
+
+ line = f"const struct {struct_type} {family.name}_ops[{cnt}]"
+ if terminate:
+ cw.p(f"extern {line};")
+ else:
+ cw.block_start(line=line + ' =')
+
+ if not terminate:
+ return
+
+ cw.nl()
+ for op_name, op in family.ops.items():
+ if op.is_async:
+ continue
+
+ if 'do' in op:
+ name = c_lower(f"{family.name}-{op_name}-doit")
+ cw.write_func_prot('int', name,
+ ['struct sk_buff *skb', 'struct genl_info *info'], suffix=';')
+
+ if 'dump' in op:
+ name = c_lower(f"{family.name}-{op_name}-dumpit")
+ cw.write_func_prot('int', name,
+ ['struct sk_buff *skb', 'struct netlink_callback *cb'], suffix=';')
+ cw.nl()
+
+
+def print_kernel_op_table(family, cw):
+ print_kernel_op_table_fwd(family, cw, terminate=False)
+ for op_name, op in family.ops.items():
+ if op.is_async:
+ continue
+
+ cw.block_start()
+ cw.p(f".cmd = {op.enum_name},")
+ if 'dont-validate' in op:
+ cw.p(f".validate = {' | '.join([c_upper('genl-dont-validate-' + x) for x in op['dont-validate']])},")
+ for op_mode in ['do', 'dump']:
+ if op_mode in op:
+ name = c_lower(f"{family.name}-{op_name}-{op_mode}it")
+ cw.p(f".{op_mode}it = {name},")
+ if family.kernel_policy == 'per-op':
+ name = c_lower(f"{family.name}-{op_name}-policy")
+ cw.p(f".policy = {name},")
+ if 'flags' in op:
+ cw.p(f".flags = {' | '.join([c_upper('genl-' + x) for x in op['flags']])},")
+ cw.block_end(line=',')
+ cw.block_end(line=';')
+ cw.nl()
+
+
+def uapi_enum_start(family, cw, obj, ckey='', enum_name='enum-name'):
+ start_line = 'enum'
+ if enum_name in obj:
+ if obj[enum_name]:
+ start_line = 'enum ' + obj[enum_name].replace('-', '_')
+ elif ckey and ckey in obj:
+ start_line = 'enum ' + family.name + '_' + obj[ckey].replace('-', '_')
+ cw.block_start(line=start_line)
+
+
+def render_uapi(family, cw):
+ hdr_prot = f"_UAPI_LINUX_{family.name.upper()}_H"
+ cw.p('#ifndef ' + hdr_prot)
+ cw.p('#define ' + hdr_prot)
+ cw.nl()
+
+ fam_key = c_upper(family.get('c-family-name', family["name"] + '_FAMILY_NAME'))
+ ver_key = c_upper(family.get('c-version-name', family["name"] + '_FAMILY_VERSION'))
+ defines = [(fam_key, family["name"]),
+ (ver_key, family.get('version', 1))]
+ cw.writes_defines(defines)
+ cw.nl()
+
+ for const in family['definitions']:
+ if const['type'] == 'enum':
+ uapi_enum_start(family, cw, const, 'name')
+ first = True
+ for item in const['entries']:
+ suffix = ','
+ if first and 'value-start' in const:
+ suffix = f" = {const['value-start']}" + suffix
+ first = False
+ item_name = item
+ if 'name-prefix' in const:
+ item_name = c_upper(const['name-prefix'] + item)
+ cw.p(item_name + suffix)
+ cw.block_end(line=';')
+ cw.nl()
+ elif const['type'] == 'flags':
+ uapi_enum_start(family, cw, const, 'name')
+ i = const.get('value-start', 0)
+ for item in const['entries']:
+ item_name = item
+ if 'name-prefix' in const:
+ item_name = c_upper(const['name-prefix'] + item)
+ cw.p(f'{item_name} = {1 << i},')
+ i += 1
+ cw.block_end(line=';')
+ cw.nl()
+
+ max_by_define = family.get('max-by-define', False)
+
+ for _, attr_set in family.attr_sets_list:
+ if attr_set.subset_of:
+ continue
+
+ cnt_name = c_upper(family.get('attr-cnt-name', f"__{attr_set.name_prefix}MAX"))
+ max_value = f"({cnt_name} - 1)"
+
+ val = 0
+ uapi_enum_start(family, cw, attr_set.yaml, 'enum-name')
+ for _, attr in attr_set.items():
+ suffix = ','
+ if attr['value'] != val:
+ suffix = f" = {attr['value']},"
+ val = attr['value']
+ val += 1
+ cw.p(attr.enum_name + suffix)
+ cw.nl()
+ cw.p(cnt_name + ('' if max_by_define else ','))
+ if not max_by_define:
+ cw.p(f"{attr_set.max_name} = {max_value}")
+ cw.block_end(line=';')
+ if max_by_define:
+ cw.p(f"#define {attr_set.max_name} {max_value}")
+ cw.nl()
+
+ # Commands
+ separate_ntf = 'async-prefix' in family['operations']
+
+ max_name = c_upper(family.get('cmd-max-name', f"{family.op_prefix}MAX"))
+ cnt_name = c_upper(family.get('cmd-cnt-name', f"__{family.op_prefix}MAX"))
+ max_value = f"({cnt_name} - 1)"
+
+ uapi_enum_start(family, cw, family['operations'], 'enum-name')
+ for _, op in family.ops_list:
+ if separate_ntf and ('notify' in op or 'event' in op):
+ continue
+
+ suffix = ','
+ if 'value' in op:
+ suffix = f" = {op['value']},"
+ cw.p(op.enum_name + suffix)
+ cw.nl()
+ cw.p(cnt_name + ('' if max_by_define else ','))
+ if not max_by_define:
+ cw.p(f"{max_name} = {max_value}")
+ cw.block_end(line=';')
+ if max_by_define:
+ cw.p(f"#define {max_name} {max_value}")
+ cw.nl()
+
+ if separate_ntf:
+ uapi_enum_start(family, cw, family['operations'], enum_name='async-enum')
+ for _, op in family.ops_list:
+ if separate_ntf and not ('notify' in op or 'event' in op):
+ continue
+
+ suffix = ','
+ if 'value' in op:
+ suffix = f" = {op['value']},"
+ cw.p(op.enum_name + suffix)
+ cw.block_end(line=';')
+ cw.nl()
+
+ # Multicast
+ grps = family.get('mcast-groups', {'list': []})
+ defines = []
+ for grp in grps['list']:
+ name = grp['name']
+ defines.append([c_upper(grp.get('c-define-name', f"{family.name}-mcgrp-{name}")),
+ f'{name}'])
+ cw.nl()
+ if defines:
+ cw.writes_defines(defines)
+ cw.nl()
+
+ cw.p(f'#endif /* {hdr_prot} */')
+
+
+def find_kernel_root(full_path):
+ sub_path = ''
+ while True:
+ sub_path = os.path.join(os.path.basename(full_path), sub_path)
+ full_path = os.path.dirname(full_path)
+ maintainers = os.path.join(full_path, "MAINTAINERS")
+ if os.path.exists(maintainers):
+ return full_path, sub_path[:-1]
+
+
+def main():
+ parser = argparse.ArgumentParser(description='Netlink simple parsing generator')
+ parser.add_argument('--mode', dest='mode', type=str, required=True)
+ parser.add_argument('--spec', dest='spec', type=str, required=True)
+ parser.add_argument('--header', dest='header', action='store_true', default=None)
+ parser.add_argument('--source', dest='header', action='store_false')
+ parser.add_argument('--user-header', nargs='+', default=[])
+ args = parser.parse_args()
+
+ if args.header is None:
+ parser.error("--header or --source is required")
+
+ try:
+ parsed = Family(args.spec)
+ except yaml.YAMLError as exc:
+ print(exc)
+ os.sys.exit(1)
+ return
+
+ cw = CodeWriter(BaseNlLib())
+
+ _, spec_kernel = find_kernel_root(args.spec)
+ if args.mode == 'uapi':
+ cw.p('/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */')
+ else:
+ cw.p('// SPDX-License-Identifier: BSD-3-Clause')
+ cw.p("// Do not edit directly, auto-generated from:")
+ cw.p(f"//\t{spec_kernel}")
+ cw.p(f"// YNL-GEN {args.mode} {'header' if args.header else 'source'}")
+ cw.nl()
+
+ if args.mode == 'uapi':
+ render_uapi(parsed, cw)
+ return
+
+ hdr_prot = f"_LINUX_{parsed.name.upper()}_GEN_H"
+ if args.header:
+ cw.p('#ifndef ' + hdr_prot)
+ cw.p('#define ' + hdr_prot)
+ cw.nl()
+
+ if args.mode == 'kernel':
+ cw.p('#include <net/netlink.h>')
+ cw.p('#include <net/genetlink.h>')
+ cw.nl()
+ if not args.header:
+ cw.p(f'#include "{parsed.name}-nl.h"')
+ cw.nl()
+ headers = [parsed.uapi_header]
+ for definition in parsed['definitions']:
+ if 'header' in definition:
+ headers.append(definition['header'])
+ for one in headers:
+ cw.p(f"#include <{one}>")
+ cw.nl()
+
+ if args.mode == "user":
+ if not args.header:
+ cw.p("#include <stdlib.h>")
+ cw.p("#include <stdio.h>")
+ cw.p("#include <string.h>")
+ cw.p("#include <libmnl/libmnl.h>")
+ cw.p("#include <linux/genetlink.h>")
+ cw.nl()
+ for one in args.user_header:
+ cw.p(f'#include "{one}"')
+ else:
+ cw.p('struct ynl_sock;')
+ cw.nl()
+
+ if args.mode == "kernel":
+ if args.header:
+ if parsed.kernel_policy == 'global':
+ cw.p(f"// Global operation policy for {parsed.name}")
+
+ struct = Struct(parsed, parsed.global_policy_set, type_list=parsed.global_policy)
+ print_req_policy_fwd(cw, struct)
+ cw.nl()
+
+ for op_name, op in parsed.ops.items():
+ if parsed.kernel_policy == 'per-op' and 'do' in op and 'event' not in op:
+ cw.p(f"// {op.enum_name} - do")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, "do")
+ print_req_policy_fwd(cw, ri.struct['request'], op=op)
+ cw.nl()
+
+ print_kernel_op_table_fwd(parsed, cw)
+ else:
+ if parsed.kernel_policy == 'global':
+ cw.p(f"// Global operation policy for {parsed.name}")
+
+ struct = Struct(parsed, parsed.global_policy_set, type_list=parsed.global_policy)
+ print_req_policy(cw, struct)
+ cw.nl()
+
+ for op_name, op in parsed.ops.items():
+ if parsed.kernel_policy == 'per-op':
+ for op_mode in {'do', 'dump'}:
+ if op_mode in op and 'request' in op[op_mode]:
+ cw.p(f"// {op.enum_name} - {op_mode}")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, op_mode)
+ print_req_policy(cw, ri.struct['request'], op=op)
+ cw.nl()
+
+ print_kernel_op_table(parsed, cw)
+
+ if args.mode == "user":
+ has_ntf = False
+ if args.header:
+ cw.p('// Common nested types')
+ for attr_set, struct in sorted(parsed.pure_nested_structs.items()):
+ ri = RenderInfo(cw, parsed, args.mode, "", "", "", attr_set)
+ print_type_full(ri, struct)
+
+ for op_name, op in parsed.ops.items():
+ cw.p(f"/* ============== {op.enum_name} ============== */")
+
+ if 'do' in op and 'event' not in op:
+ cw.p(f"// {op.enum_name} - do")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, "do")
+ print_req_type(ri)
+ print_req_type_helpers(ri)
+ cw.nl()
+ print_rsp_type(ri)
+ print_rsp_type_helpers(ri)
+ cw.nl()
+ print_req_prototype(ri)
+ cw.nl()
+
+ if 'dump' in op:
+ cw.p(f"// {op.enum_name} - dump")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, 'dump')
+ if 'request' in op['dump']:
+ print_req_type(ri)
+ print_req_type_helpers(ri)
+ if not ri.type_consistent:
+ print_rsp_type(ri)
+ print_wrapped_type(ri)
+ print_dump_prototype(ri)
+ cw.nl()
+
+ if 'notify' in op:
+ cw.p(f"// {op.enum_name} - notify")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, 'notify')
+ has_ntf = True
+ if not ri.type_consistent:
+ raise Exception('Only notifications with consistent types supported')
+ print_wrapped_type(ri)
+
+ if 'event' in op:
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, 'event')
+ cw.p(f"// {op.enum_name} - event")
+ print_rsp_type(ri)
+ cw.nl()
+ print_wrapped_type(ri)
+
+ if has_ntf:
+ cw.p('// --------------- Common notification parsing --------------- //')
+ print_ntf_parse_prototype(parsed, cw)
+ cw.nl()
+ else:
+ cw.p('// Policies')
+ for name, _ in parsed.attr_sets.items():
+ struct = Struct(parsed, name)
+ put_typol_fwd(cw, struct)
+ cw.nl()
+
+ for name, _ in parsed.attr_sets.items():
+ struct = Struct(parsed, name)
+ put_typol(cw, struct)
+
+ cw.p('// Common nested types')
+ for attr_set, struct in sorted(parsed.pure_nested_structs.items()):
+ ri = RenderInfo(cw, parsed, args.mode, "", "", "", attr_set)
+
+ free_rsp_nested(ri, struct)
+ if struct.request:
+ put_req_nested(ri, struct)
+ if struct.reply:
+ parse_rsp_nested(ri, struct)
+
+ for op_name, op in parsed.ops.items():
+ cw.p(f"/* ============== {op.enum_name} ============== */")
+ if 'do' in op and 'event' not in op:
+ cw.p(f"// {op.enum_name} - do")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, "do")
+ print_rsp_free(ri)
+ parse_rsp_msg(ri)
+ print_req(ri)
+ cw.nl()
+
+ if 'dump' in op:
+ cw.p(f"// {op.enum_name} - dump")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, "dump")
+ if not ri.type_consistent:
+ parse_rsp_msg(ri, deref=True)
+ print_dump_type_free(ri)
+ print_dump(ri)
+ cw.nl()
+
+ if 'notify' in op:
+ cw.p(f"// {op.enum_name} - notify")
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, 'notify')
+ has_ntf = True
+ if not ri.type_consistent:
+ raise Exception('Only notifications with consistent types supported')
+ print_ntf_type_free(ri)
+
+ if 'event' in op:
+ cw.p(f"// {op.enum_name} - event")
+ has_ntf = True
+
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, "do")
+ parse_rsp_msg(ri)
+
+ ri = RenderInfo(cw, parsed, args.mode, op, op_name, "event")
+ print_ntf_type_free(ri)
+
+ if has_ntf:
+ cw.p('// --------------- Common notification parsing --------------- //')
+ print_ntf_type_parse(parsed, cw, args.mode)
+
+ if args.header:
+ cw.p(f'#endif /* {hdr_prot} */')
+
+
+if __name__ == "__main__":
+ main()
diff --git a/tools/net/ynl/ynl-regen.sh b/tools/net/ynl/ynl-regen.sh
new file mode 100755
index 000000000000..5664c60f0964
--- /dev/null
+++ b/tools/net/ynl/ynl-regen.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+# SPDX-License-Identifier: BSD-3-Clause
+
+TOOL=$(dirname $(realpath $0))/ynl-gen-c.py
+
+force=
+
+while [ ! -z "$1" ]; do
+ case "$1" in
+ -f ) force=yes; shift ;;
+ * ) echo "Unrecognized option '$1'"; exit 1 ;;
+ esac
+done
+
+KDIR=$(dirname $(dirname $(dirname $(dirname $(realpath $0)))))
+
+files=$(git grep --files-with-matches '^// YNL-GEN \(kernel\|uapi\)')
+for f in $files; do
+ # params: 0 1 2 3 4 5
+ # // $YAML // YNL-GEN kernel $mode
+ params=( $(git grep -B1 -h '// YNL-GEN' $f) )
+
+ if [ $f -nt ${params[1]} -a -z "$force" ]; then
+ echo -e "\tSKIP $f"
+ continue
+ fi
+
+ echo -e "\tGEN ${params[4]}\t$f"
+ $TOOL --mode ${params[4]} --${params[5]} --spec $KDIR/${params[1]} > $f
+done
--
2.37.3
