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Date:   Sat, 13 Jun 2020 18:37:09 -0600
From:   David Ahern <dsahern@...il.com>
To:     Andrea Mayer <andrea.mayer@...roma2.it>,
        David Ahern <dsahern@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Shrijeet Mukherjee <shrijeet@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Shuah Khan <shuah@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Cc:     Donald Sharp <sharpd@...ulusnetworks.com>,
        Roopa Prabhu <roopa@...ulusnetworks.com>,
        Dinesh Dutt <didutt@...il.com>,
        Stefano Salsano <stefano.salsano@...roma2.it>,
        Paolo Lungaroni <paolo.lungaroni@...t.it>,
        Ahmed Abdelsalam <ahabdels@...il.com>
Subject: Re: [RFC,net-next, 1/5] l3mdev: add infrastructure for table to VRF
 mapping

On 6/12/20 10:49 AM, Andrea Mayer wrote:
> @@ -37,6 +45,15 @@ struct l3mdev_ops {
>  
>  #ifdef CONFIG_NET_L3_MASTER_DEV
>  
> +int l3mdev_table_lookup_register(enum l3mdev_type l3type,
> +				 int (*fn)(struct net *net, u32 table_id));
> +
> +void l3mdev_table_lookup_unregister(enum l3mdev_type l3type,
> +				    int (*fn)(struct net *net, u32 table_id));
> +
> +int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net,
> +				      u32 table_id);
> +
>  int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
>  			  struct fib_lookup_arg *arg);
>  
> @@ -280,6 +297,26 @@ struct sk_buff *l3mdev_ip6_out(struct sock *sk, struct sk_buff *skb)
>  	return skb;
>  }
>  
> +static inline
> +int l3mdev_table_lookup_register(enum l3mdev_type l3type,
> +				 int (*fn)(struct net *net, u32 table_id))
> +{
> +	return -EOPNOTSUPP;
> +}
> +
> +static inline
> +void l3mdev_table_lookup_unregister(enum l3mdev_type l3type,
> +				    int (*fn)(struct net *net, u32 table_id))
> +{
> +}
> +
> +static inline
> +int l3mdev_ifindex_lookup_by_table_id(enum l3mdev_type l3type, struct net *net,
> +				      u32 table_id)
> +{
> +	return -ENODEV;
> +}
> +
>  static inline
>  int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
>  			  struct fib_lookup_arg *arg)
> diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c
> index f35899d45a9a..6cc1fe7eb039 100644
> --- a/net/l3mdev/l3mdev.c
> +++ b/net/l3mdev/l3mdev.c
> @@ -9,6 +9,101 @@
>  #include <net/fib_rules.h>
>  #include <net/l3mdev.h>
>  
> +DEFINE_SPINLOCK(l3mdev_lock);
> +
> +typedef int (*lookup_by_table_id_t)(struct net *net, u32 table_d);
> +

I should have caught this earlier. Move lookup_by_table_id_t to l3mdev.h
and use above for 'fn' in l3mdev_table_lookup_{un,}register

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