OpenSDV
/
original_kernel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ynl: rename array-nest to indexed-array 

Some implementations, like bonding, has nest array with same attr type.
To support all kinds of entries under one nest array. As discussed[1],
let's rename array-nest to indexed-array, and assuming the value is
a nest by passing the type via sub-type.

[1] https://lore.kernel.org/netdev/20240312100105.16a59086@kernel.org/

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240404063114.1221532-2-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Hangbin Liu 2024-04-04 14:31:12 +08:00 committed by Jakub Kicinski
parent f410cbea9f
commit aa6485d813
10 changed files with 53 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/netlink/genetlink-c.yaml
View File

@ -158,7 +158,7 @@ properties:
type: &attr-type
enum: [ unused, pad, flag, binary,
uint, sint, u8, u16, u32, u64, s32, s64,
string, nest, array-nest, nest-type-value ]
string, nest, indexed-array, nest-type-value ]
doc:
description: Documentation of the attribute.
type: string

2
Documentation/netlink/genetlink-legacy.yaml
View File

@ -201,7 +201,7 @@ properties:
description: The netlink attribute type
enum: [ unused, pad, flag, binary, bitfield32,
uint, sint, u8, u16, u32, u64, s32, s64,
string, nest, array-nest, nest-type-value ]
string, nest, indexed-array, nest-type-value ]
doc:
description: Documentation of the attribute.
type: string

2
Documentation/netlink/genetlink.yaml
View File

@ -124,7 +124,7 @@ properties:
type: &attr-type
enum: [ unused, pad, flag, binary,
uint, sint, u8, u16, u32, u64, s32, s64,
string, nest, array-nest, nest-type-value ]
string, nest, indexed-array, nest-type-value ]
doc:
description: Documentation of the attribute.
type: string

2
Documentation/netlink/netlink-raw.yaml
View File

@ -222,7 +222,7 @@ properties:
description: The netlink attribute type
enum: [ unused, pad, flag, binary, bitfield32,
u8, u16, u32, u64, s8, s16, s32, s64,
string, nest, array-nest, nest-type-value,
string, nest, indexed-array, nest-type-value,
sub-message ]
doc:
description: Documentation of the attribute.

6
Documentation/netlink/specs/nlctrl.yaml
View File

@ -65,11 +65,13 @@ attribute-sets:
type: u32
-
name: ops
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: op-attrs
-
name: mcast-groups
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: mcast-group-attrs
-
name: policy

3
Documentation/netlink/specs/rt_link.yaml
View File

@ -1690,7 +1690,8 @@ attribute-sets:
type: binary
-
name: hw-s-info
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: hw-s-info-one
-
name: l3-stats

21
Documentation/netlink/specs/tc.yaml
View File

@ -1988,7 +1988,8 @@ attribute-sets:
nested-attributes: tc-ematch-attrs
-
name: act
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-act-attrs
-
name: police
@ -2128,7 +2129,8 @@ attribute-sets:
type: u32
-
name: tin-stats
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-cake-tin-stats-attrs
-
name: deficit
@ -2348,7 +2350,8 @@ attribute-sets:
type: string
-
name: act
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-act-attrs
-
name: key-eth-dst
@ -2849,7 +2852,8 @@ attribute-sets:
type: string
-
name: act
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-act-attrs
-
name: mask
@ -3002,7 +3006,8 @@ attribute-sets:
type: u32
-
name: act
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-act-attrs
-
name: flags
@ -3375,7 +3380,8 @@ attribute-sets:
nested-attributes: tc-police-attrs
-
name: act
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-act-attrs
-
name: tc-taprio-attrs
@ -3593,7 +3599,8 @@ attribute-sets:
nested-attributes: tc-police-attrs
-
name: act
type: array-nest
type: indexed-array
sub-type: nest
nested-attributes: tc-act-attrs
-
name: indev

12
Documentation/userspace-api/netlink/genetlink-legacy.rst
View File

@ -46,10 +46,16 @@ For reference the ``multi-attr`` array may look like this::
where ``ARRAY-ATTR`` is the array entry type.
array-nest
~~~~~~~~~~
indexed-array
~~~~~~~~~~~~~
``array-nest`` creates the following structure::
``indexed-array`` wraps the entire array in an extra attribute (hence
limiting its size to 64kB). The ``ENTRY`` nests are special and have the
index of the entry as their type instead of normal attribute type.
A ``sub-type`` is needed to describe what type in the ``ENTRY``. A ``nest``
``sub-type`` means there are nest arrays in the ``ENTRY``, with the structure
looks like::
[SOME-OTHER-ATTR]
[ARRAY-ATTR]

13
tools/net/ynl/lib/ynl.py
View File

@ -631,15 +631,18 @@ class YnlFamily(SpecFamily):
decoded = self._formatted_string(decoded, attr_spec.display_hint)
return decoded
def _decode_array_nest(self, attr, attr_spec):
def _decode_array_attr(self, attr, attr_spec):
decoded = []
offset = 0
while offset < len(attr.raw):
item = NlAttr(attr.raw, offset)
offset += item.full_len
subattrs = self._decode(NlAttrs(item.raw), attr_spec['nested-attributes'])
decoded.append({ item.type: subattrs })
if attr_spec["sub-type"] == 'nest':
subattrs = self._decode(NlAttrs(item.raw), attr_spec['nested-attributes'])
decoded.append({ item.type: subattrs })
else:
raise Exception(f'Unknown {attr_spec["sub-type"]} with name {attr_spec["name"]}')
return decoded
def _decode_nest_type_value(self, attr, attr_spec):
@ -733,8 +736,8 @@ class YnlFamily(SpecFamily):
decoded = attr.as_scalar(attr_spec['type'], attr_spec.byte_order)
if 'enum' in attr_spec:
decoded = self._decode_enum(decoded, attr_spec)
elif attr_spec["type"] == 'array-nest':
decoded = self._decode_array_nest(attr, attr_spec)
elif attr_spec["type"] == 'indexed-array':
decoded = self._decode_array_attr(attr, attr_spec)
elif attr_spec["type"] == 'bitfield32':
value, selector = struct.unpack("II", attr.raw)
if 'enum' in attr_spec:

18
tools/net/ynl/ynl-gen-c.py
View File

@ -841,8 +841,11 @@ class AttrSet(SpecAttrSet):
t = TypeBitfield32(self.family, self, elem, value)
elif elem['type'] == 'nest':
t = TypeNest(self.family, self, elem, value)
elif elem['type'] == 'array-nest':
t = TypeArrayNest(self.family, self, elem, value)
elif elem['type'] == 'indexed-array' and 'sub-type' in elem:
if elem["sub-type"] == 'nest':
t = TypeArrayNest(self.family, self, elem, value)
else:
raise Exception(f'new_attr: unsupported sub-type {elem["sub-type"]}')
elif elem['type'] == 'nest-type-value':
t = TypeNestTypeValue(self.family, self, elem, value)
else:
@ -1055,7 +1058,7 @@ class Family(SpecFamily):
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':
elif spec['type'] == 'indexed-array':
inherit.add('idx')
self.pure_nested_structs[nested].set_inherited(inherit)
@ -1619,9 +1622,12 @@ def _multi_parse(ri, struct, init_lines, local_vars):
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 aspec['type'] == 'indexed-array' and 'sub-type' in aspec:
if aspec["sub-type"] == 'nest':
local_vars.append(f'const struct nlattr *attr_{aspec.c_name};')
array_nests.add(arg)
else:
raise Exception(f'Not supported sub-type {aspec["sub-type"]}')
if 'multi-attr' in aspec:
multi_attrs.add(arg)
needs_parg |= 'nested-attributes' in aspec