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ynl: support binary and integer sub-type for indexed-array

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Add binary and integer sub-type support for indexed-array to display bond
arp and ns targets. Here is what the result looks like:

 # ip link add bond0 type bond mode 1 \
   arp_ip_target 192.168.1.1,192.168.1.2 ns_ip6_target 2001::1,2001::2
 # ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/rt_link.yaml \
   --do getlink --json '{"ifname": "bond0"}' --output-json | jq '.linkinfo'

    "arp-ip-target": [
      "192.168.1.1",
      "192.168.1.2"
    ],
    [...]
    "ns-ip6-target": [
      "2001::1",
      "2001::2"
    ],

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://lore.kernel.org/r/20240404063114.1221532-3-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Hangbin Liu 2024-04-04 14:31:13 +08:00 committed by Jakub Kicinski
parent aa6485d813
commit a7408b56e5
2 changed files with 17 additions and 3 deletions
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10
Documentation/userspace-api/netlink/genetlink-legacy.rst
View File

@ -66,9 +66,13 @@ looks like::
[MEMBER1]
[MEMBER2]
It 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.
Other ``sub-type`` like ``u32`` means there is only one member as described
in ``sub-type`` in the ``ENTRY``. The structure looks like::
[SOME-OTHER-ATTR]
[ARRAY-ATTR]
[ENTRY u32]
[ENTRY u32]
type-value
~~~~~~~~~~

10
tools/net/ynl/lib/ynl.py
View File

@ -641,6 +641,16 @@ class YnlFamily(SpecFamily):
if attr_spec["sub-type"] == 'nest':
subattrs = self._decode(NlAttrs(item.raw), attr_spec['nested-attributes'])
decoded.append({ item.type: subattrs })
elif attr_spec["sub-type"] == 'binary':
subattrs = item.as_bin()
if attr_spec.display_hint:
subattrs = self._formatted_string(subattrs, attr_spec.display_hint)
decoded.append(subattrs)
elif attr_spec["sub-type"] in NlAttr.type_formats:
subattrs = item.as_scalar(attr_spec['sub-type'], attr_spec.byte_order)
if attr_spec.display_hint:
subattrs = self._formatted_string(subattrs, attr_spec.display_hint)
decoded.append(subattrs)
else:
raise Exception(f'Unknown {attr_spec["sub-type"]} with name {attr_spec["name"]}')
return decoded