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Date:   Thu, 17 Mar 2022 16:49:55 +0100
From:   Pablo Neira Ayuso <pablo@netfilter.org>
To:     Randy Dunlap <rdunlap@infradead.org>
Cc:     linux-kernel@vger.kernel.org,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
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        Leon Romanovsky <leon@kernel.org>,
        Jozsef Kadlecsik <kadlec@netfilter.org>,
        Florian Westphal <fw@strlen.de>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
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        Borislav Petkov <bp@alien8.de>,
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Subject: Re: [PATCH 4/9] netfilter: h323: eliminate anonymous module_init &
 module_exit
Message-ID: <YjNYo2LKM3smgEJM@salvia>
References: <20220316192010.19001-1-rdunlap@infradead.org>
 <20220316192010.19001-5-rdunlap@infradead.org>
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In-Reply-To: <20220316192010.19001-5-rdunlap@infradead.org>
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On Wed, Mar 16, 2022 at 12:20:05PM -0700, Randy Dunlap wrote:
> Eliminate anonymous module_init() and module_exit(), which can lead to
> confusion or ambiguity when reading System.map, crashes/oops/bugs,
> or an initcall_debug log.
> 
> Give each of these init and exit functions unique driver-specific
> names to eliminate the anonymous names.
> 
> Example 1: (System.map)
>  ffffffff832fc78c t init
>  ffffffff832fc79e t init
>  ffffffff832fc8f8 t init
> 
> Example 2: (initcall_debug log)
>  calling  init+0x0/0x12 @ 1
>  initcall init+0x0/0x12 returned 0 after 15 usecs
>  calling  init+0x0/0x60 @ 1
>  initcall init+0x0/0x60 returned 0 after 2 usecs
>  calling  init+0x0/0x9a @ 1
>  initcall init+0x0/0x9a returned 0 after 74 usecs

LGTM.

Should I route this through the netfilter tree?

> Fixes: f587de0e2feb ("[NETFILTER]: nf_conntrack/nf_nat: add H.323 helper port")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Pablo Neira Ayuso <pablo@netfilter.org>
> Cc: Jozsef Kadlecsik <kadlec@netfilter.org>
> Cc: Florian Westphal <fw@strlen.de>
> Cc: netfilter-devel@vger.kernel.org
> Cc: coreteam@netfilter.org
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: netdev@vger.kernel.org
> ---
>  net/ipv4/netfilter/nf_nat_h323.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> --- lnx-517-rc8.orig/net/ipv4/netfilter/nf_nat_h323.c
> +++ lnx-517-rc8/net/ipv4/netfilter/nf_nat_h323.c
> @@ -580,7 +580,7 @@ static struct nf_ct_helper_expectfn call
>  };
>  
>  /****************************************************************************/
> -static int __init init(void)
> +static int __init nf_nat_h323_init(void)
>  {
>  	BUG_ON(set_h245_addr_hook != NULL);
>  	BUG_ON(set_h225_addr_hook != NULL);
> @@ -607,7 +607,7 @@ static int __init init(void)
>  }
>  
>  /****************************************************************************/
> -static void __exit fini(void)
> +static void __exit nf_nat_h323_fini(void)
>  {
>  	RCU_INIT_POINTER(set_h245_addr_hook, NULL);
>  	RCU_INIT_POINTER(set_h225_addr_hook, NULL);
> @@ -624,8 +624,8 @@ static void __exit fini(void)
>  }
>  
>  /****************************************************************************/
> -module_init(init);
> -module_exit(fini);
> +module_init(nf_nat_h323_init);
> +module_exit(nf_nat_h323_fini);
>  
>  MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>");
>  MODULE_DESCRIPTION("H.323 NAT helper");