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authorDaniel Borkmann <daniel@iogearbox.net>2015-09-03 01:26:07 +0200
committerDavid S. Miller <davem@davemloft.net>2015-09-02 16:32:56 -0700
commit62da98656b62a5ca57f22263705175af8ded5aa1 (patch)
treea935f068ce7d2c6e20e0fce136e4b0ff7a8ef9bc /net/netfilter
parenta82b0e63917f597c546cd479acc938e08ac54f2d (diff)
netfilter: nf_conntrack: make nf_ct_zone_dflt built-in
Fengguang reported, that some randconfig generated the following linker issue with nf_ct_zone_dflt object involved: [...] CC init/version.o LD init/built-in.o net/built-in.o: In function `ipv4_conntrack_defrag': nf_defrag_ipv4.c:(.text+0x93e95): undefined reference to `nf_ct_zone_dflt' net/built-in.o: In function `ipv6_defrag': nf_defrag_ipv6_hooks.c:(.text+0xe3ffe): undefined reference to `nf_ct_zone_dflt' make: *** [vmlinux] Error 1 Given that configurations exist where we have a built-in part, which is accessing nf_ct_zone_dflt such as the two handlers nf_ct_defrag_user() and nf_ct6_defrag_user(), and a part that configures nf_conntrack as a module, we must move nf_ct_zone_dflt into a fixed, guaranteed built-in area when netfilter is configured in general. Therefore, split the more generic parts into a common header under include/linux/netfilter/ and move nf_ct_zone_dflt into the built-in section that already holds parts related to CONFIG_NF_CONNTRACK in the netfilter core. This fixes the issue on my side. Fixes: 308ac9143ee2 ("netfilter: nf_conntrack: push zone object into functions") Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter')
-rw-r--r--net/netfilter/core.c6
-rw-r--r--net/netfilter/nf_conntrack_core.c7
2 files changed, 6 insertions, 7 deletions
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 0b939b7ad724..8e47f8113495 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -388,6 +388,12 @@ EXPORT_SYMBOL(nf_conntrack_destroy);
struct nfq_ct_hook __rcu *nfq_ct_hook __read_mostly;
EXPORT_SYMBOL_GPL(nfq_ct_hook);
+/* Built-in default zone used e.g. by modules. */
+const struct nf_conntrack_zone nf_ct_zone_dflt = {
+ .id = NF_CT_DEFAULT_ZONE_ID,
+ .dir = NF_CT_DEFAULT_ZONE_DIR,
+};
+EXPORT_SYMBOL_GPL(nf_ct_zone_dflt);
#endif /* CONFIG_NF_CONNTRACK */
#ifdef CONFIG_NF_NAT_NEEDED
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index ac3be9b0629b..eedf0495f11f 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1286,13 +1286,6 @@ bool __nf_ct_kill_acct(struct nf_conn *ct,
}
EXPORT_SYMBOL_GPL(__nf_ct_kill_acct);
-/* Built-in default zone used e.g. by modules. */
-const struct nf_conntrack_zone nf_ct_zone_dflt = {
- .id = NF_CT_DEFAULT_ZONE_ID,
- .dir = NF_CT_DEFAULT_ZONE_DIR,
-};
-EXPORT_SYMBOL_GPL(nf_ct_zone_dflt);
-
#ifdef CONFIG_NF_CONNTRACK_ZONES
static struct nf_ct_ext_type nf_ct_zone_extend __read_mostly = {
.len = sizeof(struct nf_conntrack_zone),

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