[patch net-next v4 00/13] net: fix netdev to devlink_port linkage and expose to user

Jiri Pirko
2022-11-02T16:02:18Z

Currently, the info about linkage from netdev to the related
devlink_port instance is done using ndo_get_devlink_port().
This is not sufficient, as it is up to the driver to implement it and
some of them don't do that. Also it leads to a lot of unnecessary
boilerplate code in all the drivers.

Instead of that, introduce a possibility for driver to expose this
relationship by new SET_NETDEV_DEVLINK_PORT macro which stores it into
dev->devlink_port. It is ensured by the driver init/fini flows that
the devlink_port pointer does not change during the netdev lifetime.
Devlink port is always registered before netdev register and
unregistered after netdev unregister.

Benefit from this linkage setup and remove explicit calls from driver
to devlink_port_type_eth_set() and clear(). Many of the driver
didn't use it correctly anyway. Let the devlink.c to track associated
netdev events and adjust type and type pointer accordingly. Also
use this events to to keep track on ifname change and remove RTNL lock
taking from devlink_nl_port_fill().

Finally, remove the ndo_get_devlink_port() ndo which is no longer used
and expose devlink_port handle as a new netdev netlink attribute to the
user. That way, during the ifname->devlink_port lookup, userspace app
does not have to dump whole devlink port list and instead it can just
do a simple RTM_GETLINK query.

---
v3->v4:
- mostly cosmetics, see patches 5, 6 and 13 for changelogs
v2->v3:
- see patch 6 for a changelog
v1->v2:
- see patches 5 and 6 for changelogs

Jiri Pirko (13):
net: devlink: convert devlink port type-specific pointers to union
net: devlink: move port_type_warn_schedule() call to
__devlink_port_type_set()
net: devlink: move port_type_netdev_checks() call to
__devlink_port_type_set()
net: devlink: take RTNL in port_fill() function only if it is not held
net: devlink: track netdev with devlink_port assigned
net: make drivers to use SET_NETDEV_DEVLINK_PORT to set devlink_port
net: devlink: remove netdev arg from devlink_port_type_eth_set()
net: devlink: remove net namespace check from devlink_nl_port_fill()
net: devlink: store copy netdevice ifindex and ifname to allow
port_fill() without RTNL held
net: devlink: add not cleared type warning to port unregister
net: devlink: use devlink_port pointer instead of ndo_get_devlink_port
net: remove unused ndo_get_devlink_port
net: expose devlink port over rtnetlink

drivers/net/ethernet/broadcom/bnxt/bnxt.c | 14 +-
.../freescale/dpaa2/dpaa2-eth-devlink.c | 11 +-
.../net/ethernet/freescale/dpaa2/dpaa2-eth.c | 1 +
.../ethernet/fungible/funeth/funeth_main.c | 13 +-
drivers/net/ethernet/intel/ice/ice_devlink.c | 14 +-
drivers/net/ethernet/intel/ice/ice_main.c | 18 +-
drivers/net/ethernet/intel/ice/ice_repr.c | 12 +-
.../marvell/prestera/prestera_devlink.c | 17 --
.../marvell/prestera/prestera_devlink.h | 5 -
.../ethernet/marvell/prestera/prestera_main.c | 5 +-
.../net/ethernet/mellanox/mlx4/en_netdev.c | 9 +-
drivers/net/ethernet/mellanox/mlx4/main.c | 2 +-
.../ethernet/mellanox/mlx5/core/en/devlink.c | 17 --
.../ethernet/mellanox/mlx5/core/en/devlink.h | 2 -
.../net/ethernet/mellanox/mlx5/core/en_main.c | 4 +-
.../net/ethernet/mellanox/mlx5/core/en_rep.c | 44 +---
drivers/net/ethernet/mellanox/mlxsw/core.c | 20 +-
drivers/net/ethernet/mellanox/mlxsw/core.h | 7 +-
drivers/net/ethernet/mellanox/mlxsw/minimal.c | 17 +-
.../net/ethernet/mellanox/mlxsw/spectrum.c | 16 +-
drivers/net/ethernet/mscc/ocelot_net.c | 11 +-
drivers/net/ethernet/mscc/ocelot_vsc7514.c | 9 -
drivers/net/ethernet/netronome/nfp/nfp_app.h | 2 -
.../net/ethernet/netronome/nfp/nfp_devlink.c | 23 +-
.../ethernet/netronome/nfp/nfp_net_common.c | 2 -
.../net/ethernet/netronome/nfp/nfp_net_main.c | 11 +-
.../net/ethernet/netronome/nfp/nfp_net_repr.c | 1 -
drivers/net/ethernet/netronome/nfp/nfp_port.h | 2 -
.../ethernet/pensando/ionic/ionic_devlink.c | 2 +-
drivers/net/ethernet/ti/am65-cpsw-nuss.c | 14 +-
drivers/net/netdevsim/dev.c | 2 -
drivers/net/netdevsim/netdev.c | 10 +-
include/linux/netdevice.h | 24 ++-
include/net/devlink.h | 32 ++-
include/uapi/linux/if_link.h | 2 +
net/core/dev.c | 14 +-
net/core/devlink.c | 203 +++++++++++++-----
net/core/net-sysfs.c | 4 +-
net/core/rtnetlink.c | 39 ++++
net/dsa/dsa2.c | 9 -
net/dsa/slave.c | 9 +-
net/ethtool/ioctl.c | 11 +-
42 files changed, 293 insertions(+), 391 deletions(-)

--
2.37.3