inet: frags: change inet_frags_init_net() return value

commit 787bea7748a76130566f881c2342a0be4127d182 upstream.

We will soon initialize one rhashtable per struct netns_frags
in inet_frags_init_net().

This patch changes the return value to eventually propagate an
error.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index c26a6e4..7881c80 100644 (file)
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -103,9 +103,10 @@ struct inet_frags {
 int inet_frags_init(struct inet_frags *);
 void inet_frags_fini(struct inet_frags *);
 
-static inline void inet_frags_init_net(struct netns_frags *nf)
+static inline int inet_frags_init_net(struct netns_frags *nf)
 {
        atomic_set(&nf->mem, 0);
+       return 0;
 }
 void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);
 

diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index 12e8cf4..e14962c 100644 (file)
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -580,14 +580,19 @@ static int __net_init lowpan_frags_init_net(struct net *net)
 {
        struct netns_ieee802154_lowpan *ieee802154_lowpan =
                net_ieee802154_lowpan(net);
+       int res;
 
        ieee802154_lowpan->frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
        ieee802154_lowpan->frags.low_thresh = IPV6_FRAG_LOW_THRESH;
        ieee802154_lowpan->frags.timeout = IPV6_FRAG_TIMEOUT;
 
-       inet_frags_init_net(&ieee802154_lowpan->frags);
-
-       return lowpan_frags_ns_sysctl_register(net);
+       res = inet_frags_init_net(&ieee802154_lowpan->frags);
+       if (res < 0)
+               return res;
+       res = lowpan_frags_ns_sysctl_register(net);
+       if (res < 0)
+               inet_frags_exit_net(&ieee802154_lowpan->frags, &lowpan_frags);
+       return res;
 }
 
 static void __net_exit lowpan_frags_exit_net(struct net *net)

diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 7291565..14c40f7 100644 (file)
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -853,6 +853,8 @@ static void __init ip4_frags_ctl_register(void)
 
 static int __net_init ipv4_frags_init_net(struct net *net)
 {
+       int res;
+
        /* Fragment cache limits.
         *
         * The fragment memory accounting code, (tries to) account for
@@ -876,9 +878,13 @@ static int __net_init ipv4_frags_init_net(struct net *net)
         */
        net->ipv4.frags.timeout = IP_FRAG_TIME;
 
-       inet_frags_init_net(&net->ipv4.frags);
-
-       return ip4_frags_ns_ctl_register(net);
+       res = inet_frags_init_net(&net->ipv4.frags);
+       if (res < 0)
+               return res;
+       res = ip4_frags_ns_ctl_register(net);
+       if (res < 0)
+               inet_frags_exit_net(&net->ipv4.frags, &ip4_frags);
+       return res;
 }
 
 static void __net_exit ipv4_frags_exit_net(struct net *net)

diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 5a9ae56..6859d1e 100644 (file)
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -650,12 +650,18 @@ EXPORT_SYMBOL_GPL(nf_ct_frag6_consume_orig);
 
 static int nf_ct_net_init(struct net *net)
 {
+       int res;
+
        net->nf_frag.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
        net->nf_frag.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
        net->nf_frag.frags.timeout = IPV6_FRAG_TIMEOUT;
-       inet_frags_init_net(&net->nf_frag.frags);
-
-       return nf_ct_frag6_sysctl_register(net);
+       res = inet_frags_init_net(&net->nf_frag.frags);
+       if (res < 0)
+               return res;
+       res = nf_ct_frag6_sysctl_register(net);
+       if (res < 0)
+               inet_frags_exit_net(&net->nf_frag.frags, &nf_frags);
+       return res;
 }
 
 static void nf_ct_net_exit(struct net *net)

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 58f2139..c38a1ab 100644 (file)
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -708,13 +708,20 @@ static void ip6_frags_sysctl_unregister(void)
 
 static int __net_init ipv6_frags_init_net(struct net *net)
 {
+       int res;
+
        net->ipv6.frags.high_thresh = IPV6_FRAG_HIGH_THRESH;
        net->ipv6.frags.low_thresh = IPV6_FRAG_LOW_THRESH;
        net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;
 
-       inet_frags_init_net(&net->ipv6.frags);
+       res = inet_frags_init_net(&net->ipv6.frags);
+       if (res < 0)
+               return res;
 
-       return ip6_frags_ns_sysctl_register(net);
+       res = ip6_frags_ns_sysctl_register(net);
+       if (res < 0)
+               inet_frags_exit_net(&net->ipv6.frags, &ip6_frags);
+       return res;
 }
 
 static void __net_exit ipv6_frags_exit_net(struct net *net)