[net-next,v4,00/13] tools/net/ynl: Add 'sub-message' support to ynl

Message

Donald Hunter Dec. 13, 2023, 10:41 p.m. UTC

This patchset adds a 'sub-message' attribute type to the netlink-raw
schema and implements it in ynl. This provides support for kind-specific
options attributes as used in rt_link and tc raw netlink families.

A description of the new 'sub-message' attribute type and the
corresponding sub-message definitions is provided in patch 3.

The patchset includes updates to the rt_link spec and a new tc spec that
make use of the new 'sub-message' attribute type.

As mentioned in patch 4, encode support is not yet implemented in ynl
and support for sub-message selectors at a different nest level from the
key attribute is not yet supported. I plan to work on these in folloup
patches.

Patches 1 is code cleanup in ynl
Patches 2-4 add sub-message support to the schema and ynl with
documentation updates.
Patch 5 adds binary and pad support to structs in netlink-raw.
Patches 6-8 contain specs that use the sub-message attribute type.
Patches 9-13 update ynl-gen-rst and its make target

Changes since v3: (reported by Breno Leitao)
 - Remove an unnecessary make dependency from the YNL_INDEX target.

Changes since v2: (reported by Jakub Kicinski and Breno Leitao)
 - Fixed ynl-gen-c breakage
 - Added schema constraint for pad/binary & len
 - Improved description text in raw schema
 - Used | for all multi-line text in schema
 - Updated docs with explanation of what a sub-message is
 - Reverted change in ynl-gen-rst
 - Added ynl-gen-rst patches and grouped them all at end of patchset

Changes since v1: (reported by Jakub Kicinski, thanks!)
 - Added cleanups for ynl and generated netlink docs
 - Describe sub-messages in netlink docs
 - Cleaned up unintended indent changes
 - Cleaned up rt-link sub-message definitions
 - Cleaned up array index expressions to follow python style
 - Added sub-messages to generated netlink spec docs

Donald Hunter (13):
  tools/net/ynl: Use consistent array index expression formatting
  doc/netlink: Add sub-message support to netlink-raw
  doc/netlink: Document the sub-message format for netlink-raw
  tools/net/ynl: Add 'sub-message' attribute decoding to ynl
  tools/net/ynl: Add binary and pad support to structs for tc
  doc/netlink/specs: Add sub-message type to rt_link family
  doc/netlink/specs: use pad in structs in rt_link
  doc/netlink/specs: Add a spec for tc
  doc/netlink: Regenerate netlink .rst files if ynl-gen-rst changes
  tools/net/ynl-gen-rst: Add sub-messages to generated docs
  tools/net/ynl-gen-rst: Sort the index of generated netlink specs
  tools/net/ynl-gen-rst: Remove bold from attribute-set headings
  tools/net/ynl-gen-rst: Remove extra indentation from generated docs

 Documentation/Makefile                        |    6 +-
 Documentation/netlink/netlink-raw.yaml        |   65 +-
 Documentation/netlink/specs/rt_link.yaml      |  449 +++-
 Documentation/netlink/specs/tc.yaml           | 2037 +++++++++++++++++
 .../userspace-api/netlink/netlink-raw.rst     |   96 +-
 tools/net/ynl/lib/nlspec.py                   |   55 +
 tools/net/ynl/lib/ynl.py                      |   94 +-
 tools/net/ynl/ynl-gen-rst.py                  |   31 +-
 8 files changed, 2788 insertions(+), 45 deletions(-)
 create mode 100644 Documentation/netlink/specs/tc.yaml