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tools: ynl-gen: generate static descriptions of notifications

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Notifications may come in at any time. The family must be always
ready to parse a random incoming notification. Generate notification
table for parsing and tell YNL which request we're processing
to distinguish responses from notifications.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-06-01 19:35:48 -07:00
parent 8cb6afb335
commit 59d814f0f2
1 changed files with 42 additions and 10 deletions
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52
tools/net/ynl/ynl-gen-c.py
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@ -887,6 +887,12 @@ class Family(SpecFamily):
self.hooks[when][op_mode]['set'].add(name)
self.hooks[when][op_mode]['list'].append(name)
def has_notifications(self):
for op in self.ops.values():
if 'notify' in op or 'event' in op:
return True
return False
class RenderInfo:
def __init__(self, cw, family, ku_space, op, op_name, op_mode, attr_set=None):
@ -1587,6 +1593,7 @@ def print_wrapped_type(ri):
elif ri.op_mode == 'notify' or ri.op_mode == 'event':
ri.cw.p('__u16 family;')
ri.cw.p('__u8 cmd;')
ri.cw.p('struct ynl_ntf_base_type *next;')
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=';')
@ -2109,14 +2116,43 @@ def render_uapi(family, cw):
cw.p(f'#endif /* {hdr_prot} */')
def _render_user_ntf_entry(ri, op):
ri.cw.block_start(line=f"[{op.enum_name}] = ")
ri.cw.p(f".alloc_sz\t= sizeof({type_name(ri, 'event')}),")
ri.cw.p(f".cb\t\t= {op_prefix(ri, 'reply', deref=True)}_parse,")
ri.cw.p(f".policy\t\t= &{ri.struct['reply'].render_name}_nest,")
ri.cw.p(f".free\t\t= (void *){op_prefix(ri, 'notify')}_free,")
ri.cw.block_end(line=',')
def render_user_family(family, cw, prototype):
symbol = f'const struct ynl_family ynl_{family.c_name}_family'
if prototype:
cw.p(f'extern {symbol};')
else:
cw.block_start(f'{symbol} = ')
cw.p(f'.name = "{family.name}",')
cw.block_end(line=';')
return
ntf = family.has_notifications()
if ntf:
cw.block_start(line=f"static const struct ynl_ntf_info {family['name']}_ntf_info[] = ")
for ntf_op in sorted(family.all_notify.keys()):
op = family.ops[ntf_op]
ri = RenderInfo(cw, family, "user", op, ntf_op, "notify")
for ntf in op['notify']['cmds']:
_render_user_ntf_entry(ri, ntf)
for op_name, op in family.ops.items():
if 'event' not in op:
continue
ri = RenderInfo(cw, family, "user", op, op_name, "event")
_render_user_ntf_entry(ri, op)
cw.block_end(line=";")
cw.nl()
cw.block_start(f'{symbol} = ')
cw.p(f'.name\t\t= "{family.name}",')
if ntf:
cw.p(f".ntf_info\t= {family['name']}_ntf_info,")
cw.p(f".ntf_info_size\t= MNL_ARRAY_SIZE({family['name']}_ntf_info),")
cw.block_end(line=';')
def find_kernel_root(full_path):
@ -2277,7 +2313,6 @@ def main():
print_kernel_family_struct_src(parsed, cw)
if args.mode == "user":
has_ntf = False
if args.header:
cw.p('/* Enums */')
put_op_name_fwd(parsed, cw)
@ -2322,7 +2357,6 @@ def main():
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(f'Only notifications with consistent types supported ({op.name})')
print_wrapped_type(ri)
@ -2334,7 +2368,7 @@ def main():
cw.nl()
print_wrapped_type(ri)
if has_ntf:
if parsed.has_notifications():
cw.p('/* --------------- Common notification parsing --------------- */')
print_ntf_parse_prototype(parsed, cw)
cw.nl()
@ -2390,14 +2424,12 @@ def main():
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(f'Only notifications with consistent types supported ({op.name})')
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)
@ -2405,7 +2437,7 @@ def main():
ri = RenderInfo(cw, parsed, args.mode, op, op_name, "event")
print_ntf_type_free(ri)
if has_ntf:
if parsed.has_notifications():
cw.p('/* --------------- Common notification parsing --------------- */')
print_ntf_type_parse(parsed, cw, args.mode)