netdev - [PATCH v4 net-next 04/19] inet: frags: refactor ipv6_frag

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Message-Id: <20180331195900.183604-5-edumazet@google.com>
Date:   Sat, 31 Mar 2018 12:58:45 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>, Florian Westphal <fw@...len.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Thomas Graf <tgraf@...g.ch>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@....samsung.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v4 net-next 04/19] inet: frags: refactor ipv6_frag_init()

We want to call inet_frags_init() earlier.

This is a prereq to "inet: frags: use rhashtables for reassembly units"

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv6/reassembly.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 4855de6f673a4753526679ca29dcdaebecb5777f..f0071b113a92fcff15ac57610170c12b17cb59ba 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -742,18 +742,6 @@ int __init ipv6_frag_init(void)
 {
 	int ret;
 
-	ret = inet6_add_protocol(&frag_protocol, IPPROTO_FRAGMENT);
-	if (ret)
-		goto out;
-
-	ret = ip6_frags_sysctl_register();
-	if (ret)
-		goto err_sysctl;
-
-	ret = register_pernet_subsys(&ip6_frags_ops);
-	if (ret)
-		goto err_pernet;
-
 	ip6_frags.hashfn = ip6_hashfn;
 	ip6_frags.constructor = ip6_frag_init;
 	ip6_frags.destructor = NULL;
@@ -762,8 +750,21 @@ int __init ipv6_frag_init(void)
 	ip6_frags.frag_expire = ip6_frag_expire;
 	ip6_frags.frags_cache_name = ip6_frag_cache_name;
 	ret = inet_frags_init(&ip6_frags);
+	if (ret)
+		goto out;
+
+	ret = inet6_add_protocol(&frag_protocol, IPPROTO_FRAGMENT);
+	if (ret)
+		goto err_protocol;
+
+	ret = ip6_frags_sysctl_register();
+	if (ret)
+		goto err_sysctl;
+
+	ret = register_pernet_subsys(&ip6_frags_ops);
 	if (ret)
 		goto err_pernet;
+
 out:
 	return ret;
 
@@ -771,6 +772,8 @@ int __init ipv6_frag_init(void)
 	ip6_frags_sysctl_unregister();
 err_sysctl:
 	inet6_del_protocol(&frag_protocol, IPPROTO_FRAGMENT);
+err_protocol:
+	inet_frags_fini(&ip6_frags);
 	goto out;
 }
 
-- 
2.17.0.rc1.321.gba9d0f2565-goog