netfilter: conntrack: mark extension structs as const

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

include/net/netfilter/nf_conntrack_extend.h

@@ -99,6 +99,6 @@ struct nf_ct_ext_type {
 	u8 align;
 };
 
-int nf_ct_extend_register(struct nf_ct_ext_type *type);
-void nf_ct_extend_unregister(struct nf_ct_ext_type *type);
+int nf_ct_extend_register(const struct nf_ct_ext_type *type);
+void nf_ct_extend_unregister(const struct nf_ct_ext_type *type);
 #endif /* _NF_CONNTRACK_EXTEND_H */

net/netfilter/nf_conntrack_acct.c

@@ -55,7 +55,7 @@ seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
 };
 EXPORT_SYMBOL_GPL(seq_print_acct);
 
-static struct nf_ct_ext_type acct_extend __read_mostly = {
+static const struct nf_ct_ext_type acct_extend = {
 	.len	= sizeof(struct nf_conn_acct),
 	.align	= __alignof__(struct nf_conn_acct),
 	.id	= NF_CT_EXT_ACCT,

net/netfilter/nf_conntrack_ecache.c

@@ -347,7 +347,7 @@ static struct ctl_table event_sysctl_table[] = {
 };
 #endif /* CONFIG_SYSCTL */
 
-static struct nf_ct_ext_type event_extend __read_mostly = {
+static const struct nf_ct_ext_type event_extend = {
 	.len	= sizeof(struct nf_conntrack_ecache),
 	.align	= __alignof__(struct nf_conntrack_ecache),
 	.id	= NF_CT_EXT_ECACHE,

net/netfilter/nf_conntrack_extend.c

@@ -116,7 +116,7 @@ void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 EXPORT_SYMBOL(nf_ct_ext_add);
 
 /* This MUST be called in process context. */
-int nf_ct_extend_register(struct nf_ct_ext_type *type)
+int nf_ct_extend_register(const struct nf_ct_ext_type *type)
 {
 	int ret = 0;
 
@@ -134,7 +134,7 @@ int nf_ct_extend_register(struct nf_ct_ext_type *type)
 EXPORT_SYMBOL_GPL(nf_ct_extend_register);
 
 /* This MUST be called in process context. */
-void nf_ct_extend_unregister(struct nf_ct_ext_type *type)
+void nf_ct_extend_unregister(const struct nf_ct_ext_type *type)
 {
 	mutex_lock(&nf_ct_ext_type_mutex);
 	RCU_INIT_POINTER(nf_ct_ext_types[type->id], NULL);

net/netfilter/nf_conntrack_helper.c

@@ -535,7 +535,7 @@ void nf_conntrack_helpers_unregister(struct nf_conntrack_helper *helper,
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_helpers_unregister);
 
-static struct nf_ct_ext_type helper_extend __read_mostly = {
+static const struct nf_ct_ext_type helper_extend = {
 	.len	= sizeof(struct nf_conn_help),
 	.align	= __alignof__(struct nf_conn_help),
 	.id	= NF_CT_EXT_HELPER,

net/netfilter/nf_conntrack_labels.c

@@ -82,7 +82,7 @@ void nf_connlabels_put(struct net *net)
 }
 EXPORT_SYMBOL_GPL(nf_connlabels_put);
 
-static struct nf_ct_ext_type labels_extend __read_mostly = {
+static const struct nf_ct_ext_type labels_extend = {
 	.len    = sizeof(struct nf_conn_labels),
 	.align  = __alignof__(struct nf_conn_labels),
 	.id     = NF_CT_EXT_LABELS,

net/netfilter/nf_conntrack_seqadj.c

@@ -231,7 +231,7 @@ s32 nf_ct_seq_offset(const struct nf_conn *ct,
 }
 EXPORT_SYMBOL_GPL(nf_ct_seq_offset);
 
-static struct nf_ct_ext_type nf_ct_seqadj_extend __read_mostly = {
+static const struct nf_ct_ext_type nf_ct_seqadj_extend = {
 	.len	= sizeof(struct nf_conn_seqadj),
 	.align	= __alignof__(struct nf_conn_seqadj),
 	.id	= NF_CT_EXT_SEQADJ,

net/netfilter/nf_conntrack_timeout.c

@@ -31,7 +31,7 @@ EXPORT_SYMBOL_GPL(nf_ct_timeout_find_get_hook);
 void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout) __read_mostly;
 EXPORT_SYMBOL_GPL(nf_ct_timeout_put_hook);
 
-static struct nf_ct_ext_type timeout_extend __read_mostly = {
+static const struct nf_ct_ext_type timeout_extend = {
 	.len	= sizeof(struct nf_conn_timeout),
 	.align	= __alignof__(struct nf_conn_timeout),
 	.id	= NF_CT_EXT_TIMEOUT,

net/netfilter/nf_conntrack_timestamp.c

@@ -33,7 +33,7 @@ static struct ctl_table tstamp_sysctl_table[] = {
 };
 #endif /* CONFIG_SYSCTL */
 
-static struct nf_ct_ext_type tstamp_extend __read_mostly = {
+static const struct nf_ct_ext_type tstamp_extend = {
 	.len	= sizeof(struct nf_conn_tstamp),
 	.align	= __alignof__(struct nf_conn_tstamp),
 	.id	= NF_CT_EXT_TSTAMP,