linux-kernel - Re: [PATCH bpf-next v6 4/8] net: remove duplicate reuseport

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Date:   Tue, 25 Jul 2023 14:19:54 -0700
From:   Martin KaFai Lau <martin.lau@...ux.dev>
To:     Lorenz Bauer <lmb@...valent.com>
Cc:     Hemanth Malla <hemanthmalla@...il.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        David Ahern <dsahern@...nel.org>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Joe Stringer <joe@...d.net.nz>,
        Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>,
        Kuniyuki Iwashima <kuniyu@...zon.com>
Subject: Re: [PATCH bpf-next v6 4/8] net: remove duplicate reuseport_lookup
 functions

On 7/24/23 5:53 PM, Martin KaFai Lau wrote:
> On 7/20/23 8:30 AM, Lorenz Bauer wrote:
>> diff --git a/include/net/inet6_hashtables.h b/include/net/inet6_hashtables.h
>> index 032ddab48f8f..f89320b6fee3 100644
>> --- a/include/net/inet6_hashtables.h
>> +++ b/include/net/inet6_hashtables.h
>> @@ -48,12 +48,21 @@ struct sock *__inet6_lookup_established(struct net *net,
>>                       const u16 hnum, const int dif,
>>                       const int sdif);
>> +typedef u32 (inet6_ehashfn_t)(const struct net *net,
>> +                   const struct in6_addr *laddr, const u16 lport,
>> +                   const struct in6_addr *faddr, const __be16 fport);
>> +
>> +inet6_ehashfn_t inet6_ehashfn;
>> +
>> +INDIRECT_CALLABLE_DECLARE(inet6_ehashfn_t udp6_ehashfn);
>> +
> 
> [ ... ]
> 
>> diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
>> index b7c56867314e..3616225c89ef 100644
>> --- a/net/ipv6/inet6_hashtables.c
>> +++ b/net/ipv6/inet6_hashtables.c
>> @@ -39,6 +39,7 @@ u32 inet6_ehashfn(const struct net *net,
>>       return __inet6_ehashfn(lhash, lport, fhash, fport,
>>                      inet6_ehash_secret + net_hash_mix(net));
>>   }
>> +EXPORT_SYMBOL_GPL(inet6_ehashfn);
>>   /*
>>    * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
>> @@ -111,18 +112,22 @@ static inline int compute_score(struct sock *sk, struct 
>> net *net,
>>       return score;
>>   }
>> +INDIRECT_CALLABLE_DECLARE(inet6_ehashfn_t udp6_ehashfn);
> 
> The same INDIRECT_CALLABLE_DECLARE is also added to inet6_hashtables.h. Is this 
> one still needed here?
> 
> The same goes for the inet_hashtables.c.

Please follow up if one of the INDIRECT_CALLABLE_DECLARE makes sense to remove.

I have applied the set after fixing up patch 7 and 8.