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Date: Wed, 11 Oct 2017 16:54:05 +0300
From: Ido Schimmel <idosch@...sch.org>
To: David Ahern <dsahern@...il.com>
Cc: netdev@...r.kernel.org, jiri@...lanox.com, idosch@...lanox.com,
kjlx@...pleofstupid.com
Subject: Re: [RFC net-next 3/4] mlxsw: spectrum: router: Add support for
address validator notifier
On Tue, Oct 10, 2017 at 09:41:04AM -0700, David Ahern wrote:
> Add support for inetaddr_validator and inet6addr_validator. The
> notifiers provide a means for validating ipv4 and ipv6 addresses
> before the addresses are installed and on failure the error
> is propagated back to the user.
>
> Signed-off-by: David Ahern <dsahern@...il.com>
> ---
> drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 10 ++++
> drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 4 ++
> .../net/ethernet/mellanox/mlxsw/spectrum_router.c | 53 ++++++++++++++++++++++
> 3 files changed, 67 insertions(+)
>
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> index 321988ac57cc..da4ee91235be 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> @@ -4505,11 +4505,19 @@ static struct notifier_block mlxsw_sp_netdevice_nb __read_mostly = {
> .notifier_call = mlxsw_sp_netdevice_event,
> };
>
> +static struct notifier_block mlxsw_sp_inetaddr_valid_nb __read_mostly = {
> + .notifier_call = mlxsw_sp_inetaddr_valid_event,
> +};
> +
> static struct notifier_block mlxsw_sp_inetaddr_nb __read_mostly = {
> .notifier_call = mlxsw_sp_inetaddr_event,
> .priority = 10, /* Must be called before FIB notifier block */
This line can now be removed since the validator notifier is called
before the inetaddr notifier.
It's used to create a RIF before fib_add_ifaddr() is invoked to create a
prefix route. IPv6 doesn't need that since routes aren't created based
on a NETDEV_UP event in inet6addr.
> };
>
> +static struct notifier_block mlxsw_sp_inet6addr_valid_nb __read_mostly = {
> + .notifier_call = mlxsw_sp_inet6addr_valid_event,
> +};
> +
> static struct notifier_block mlxsw_sp_inet6addr_nb __read_mostly = {
> .notifier_call = mlxsw_sp_inet6addr_event,
> };
> @@ -4533,7 +4541,9 @@ static int __init mlxsw_sp_module_init(void)
> int err;
>
> register_netdevice_notifier(&mlxsw_sp_netdevice_nb);
> + register_inetaddr_validator_notifier(&mlxsw_sp_inetaddr_valid_nb);
> register_inetaddr_notifier(&mlxsw_sp_inetaddr_nb);
> + register_inet6addr_validator_notifier(&mlxsw_sp_inet6addr_valid_nb);
> register_inet6addr_notifier(&mlxsw_sp_inet6addr_nb);
> register_netevent_notifier(&mlxsw_sp_router_netevent_nb);
Need unregister in rollback and __exit function.
>
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
> index 8e45183dc9bb..4865a6f58c83 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
> @@ -390,8 +390,12 @@ int mlxsw_sp_router_netevent_event(struct notifier_block *unused,
> int mlxsw_sp_netdevice_router_port_event(struct net_device *dev);
> int mlxsw_sp_inetaddr_event(struct notifier_block *unused,
> unsigned long event, void *ptr);
> +int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused,
> + unsigned long event, void *ptr);
> int mlxsw_sp_inet6addr_event(struct notifier_block *unused,
> unsigned long event, void *ptr);
> +int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused,
> + unsigned long event, void *ptr);
> int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event,
> struct netdev_notifier_changeupper_info *info);
> void
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> index 6a356f4b99a3..7d53fdf2c0a8 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> @@ -5656,6 +5656,33 @@ int mlxsw_sp_inetaddr_event(struct notifier_block *unused,
> struct mlxsw_sp_rif *rif;
> int err = 0;
>
> + /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */
> + if (event == NETDEV_UP)
> + goto out;
> +
> + mlxsw_sp = mlxsw_sp_lower_get(dev);
> + if (!mlxsw_sp)
> + goto out;
> +
> + rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
> + if (!mlxsw_sp_rif_should_config(rif, dev, event))
> + goto out;
> +
> + err = __mlxsw_sp_inetaddr_event(dev, event);
> +out:
> + return notifier_from_errno(err);
> +}
> +
> +/* only expected to be called for event == NETDEV_UP */
I don't really mind, but I don't think the comment is necessary.
> +int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused,
> + unsigned long event, void *ptr)
> +{
> + struct in_validator_info *ivi = (struct in_validator_info *)ptr;
We usually put a space after the cast in mlxsw (I'm aware of the
checkpatch CHECK).
> + struct net_device *dev = ivi->ivi_dev->dev;
> + struct mlxsw_sp *mlxsw_sp;
> + struct mlxsw_sp_rif *rif;
> + int err = 0;
> +
> mlxsw_sp = mlxsw_sp_lower_get(dev);
> if (!mlxsw_sp)
> goto out;
> @@ -5708,6 +5735,10 @@ int mlxsw_sp_inet6addr_event(struct notifier_block *unused,
> struct mlxsw_sp_inet6addr_event_work *inet6addr_work;
> struct net_device *dev = if6->idev->dev;
>
> + /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */
> + if (event == NETDEV_UP)
> + return NOTIFY_DONE;
> +
> if (!mlxsw_sp_port_dev_lower_find_rcu(dev))
> return NOTIFY_DONE;
>
> @@ -5724,6 +5755,28 @@ int mlxsw_sp_inet6addr_event(struct notifier_block *unused,
> return NOTIFY_DONE;
> }
>
> +int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused,
> + unsigned long event, void *ptr)
> +{
> + struct in6_validator_info *i6vi = (struct in6_validator_info *)ptr;
Same as above.
Looks good otherwise, thanks!
> + struct net_device *dev = i6vi->i6vi_dev->dev;
> + struct mlxsw_sp *mlxsw_sp;
> + struct mlxsw_sp_rif *rif;
> + int err = 0;
> +
> + mlxsw_sp = mlxsw_sp_lower_get(dev);
> + if (!mlxsw_sp)
> + goto out;
> +
> + rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
> + if (!mlxsw_sp_rif_should_config(rif, dev, event))
> + goto out;
> +
> + err = __mlxsw_sp_inetaddr_event(dev, event);
> +out:
> + return notifier_from_errno(err);
> +}
> +
> static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
> const char *mac, int mtu)
> {
> --
> 2.1.4
>
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