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netfilter: conntrack: remove extension register api

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These no longer register/unregister a meaningful structure so remove it.

Cc: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2022-01-20 13:07:02 +01:00 committed by Pablo Neira Ayuso
parent 1bc91a5ddf
commit 1015c3de23
19 changed files with 7 additions and 292 deletions
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1
include/net/netfilter/nf_conntrack_acct.h
View File

@ -78,7 +78,6 @@ static inline void nf_ct_acct_update(struct nf_conn *ct, u32 dir,
void nf_conntrack_acct_pernet_init(struct net *net);
int nf_conntrack_acct_init(void);
void nf_conntrack_acct_fini(void);
#endif /* _NF_CONNTRACK_ACCT_H */

13
include/net/netfilter/nf_conntrack_ecache.h
View File

@ -166,9 +166,6 @@ void nf_conntrack_ecache_work(struct net *net, enum nf_ct_ecache_state state);
void nf_conntrack_ecache_pernet_init(struct net *net);
void nf_conntrack_ecache_pernet_fini(struct net *net);
int nf_conntrack_ecache_init(void);
void nf_conntrack_ecache_fini(void);
static inline bool nf_conntrack_ecache_dwork_pending(const struct net *net)
{
return net->ct.ecache_dwork_pending;
@ -194,16 +191,6 @@ static inline void nf_conntrack_ecache_pernet_init(struct net *net)
static inline void nf_conntrack_ecache_pernet_fini(struct net *net)
{
}
static inline int nf_conntrack_ecache_init(void)
{
return 0;
}
static inline void nf_conntrack_ecache_fini(void)
{
}
static inline bool nf_conntrack_ecache_dwork_pending(const struct net *net) { return false; }
#endif /* CONFIG_NF_CONNTRACK_EVENTS */
#endif /*_NF_CONNTRACK_ECACHE_H*/

9
include/net/netfilter/nf_conntrack_extend.h
View File

@ -72,16 +72,7 @@ static inline void *__nf_ct_ext_find(const struct nf_conn *ct, u8 id)
#define nf_ct_ext_find(ext, id) \
((id##_TYPE *)__nf_ct_ext_find((ext), (id)))
/* Destroy all relationships */
void nf_ct_ext_destroy(struct nf_conn *ct);
/* Add this type, returns pointer to data or NULL. */
void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp);
struct nf_ct_ext_type {
enum nf_ct_ext_id id;
};
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 */

3
include/net/netfilter/nf_conntrack_labels.h
View File

@ -45,12 +45,9 @@ int nf_connlabels_replace(struct nf_conn *ct,
#ifdef CONFIG_NF_CONNTRACK_LABELS
int nf_conntrack_labels_init(void);
void nf_conntrack_labels_fini(void);
int nf_connlabels_get(struct net *net, unsigned int bit);
void nf_connlabels_put(struct net *net);
#else
static inline int nf_conntrack_labels_init(void) { return 0; }
static inline void nf_conntrack_labels_fini(void) {}
static inline int nf_connlabels_get(struct net *net, unsigned int bit) { return 0; }
static inline void nf_connlabels_put(struct net *net) {}
#endif

3
include/net/netfilter/nf_conntrack_seqadj.h
View File

@ -42,7 +42,4 @@ int nf_ct_seq_adjust(struct sk_buff *skb, struct nf_conn *ct,
enum ip_conntrack_info ctinfo, unsigned int protoff);
s32 nf_ct_seq_offset(const struct nf_conn *ct, enum ip_conntrack_dir, u32 seq);
int nf_conntrack_seqadj_init(void);
void nf_conntrack_seqadj_fini(void);
#endif /* _NF_CONNTRACK_SEQADJ_H */

12
include/net/netfilter/nf_conntrack_timeout.h
View File

@ -89,23 +89,11 @@ static inline unsigned int *nf_ct_timeout_lookup(const struct nf_conn *ct)
}
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
int nf_conntrack_timeout_init(void);
void nf_conntrack_timeout_fini(void);
void nf_ct_untimeout(struct net *net, struct nf_ct_timeout *timeout);
int nf_ct_set_timeout(struct net *net, struct nf_conn *ct, u8 l3num, u8 l4num,
const char *timeout_name);
void nf_ct_destroy_timeout(struct nf_conn *ct);
#else
static inline int nf_conntrack_timeout_init(void)
{
return 0;
}
static inline void nf_conntrack_timeout_fini(void)
{
return;
}
static inline int nf_ct_set_timeout(struct net *net, struct nf_conn *ct,
u8 l3num, u8 l4num,
const char *timeout_name)

13
include/net/netfilter/nf_conntrack_timestamp.h
View File

@ -40,21 +40,8 @@ struct nf_conn_tstamp *nf_ct_tstamp_ext_add(struct nf_conn *ct, gfp_t gfp)
#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
void nf_conntrack_tstamp_pernet_init(struct net *net);
int nf_conntrack_tstamp_init(void);
void nf_conntrack_tstamp_fini(void);
#else
static inline void nf_conntrack_tstamp_pernet_init(struct net *net) {}
static inline int nf_conntrack_tstamp_init(void)
{
return 0;
}
static inline void nf_conntrack_tstamp_fini(void)
{
return;
}
#endif /* CONFIG_NF_CONNTRACK_TIMESTAMP */
#endif /* _NF_CONNTRACK_TSTAMP_H */

17
net/netfilter/nf_conntrack_acct.c
View File

@ -22,24 +22,7 @@ static bool nf_ct_acct __read_mostly;
module_param_named(acct, nf_ct_acct, bool, 0644);
MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
static const struct nf_ct_ext_type acct_extend = {
.id = NF_CT_EXT_ACCT,
};
void nf_conntrack_acct_pernet_init(struct net *net)
{
net->ct.sysctl_acct = nf_ct_acct;
}
int nf_conntrack_acct_init(void)
{
int ret = nf_ct_extend_register(&acct_extend);
if (ret < 0)
pr_err("Unable to register extension\n");
return ret;
}
void nf_conntrack_acct_fini(void)
{
nf_ct_extend_unregister(&acct_extend);
}

43
net/netfilter/nf_conntrack_core.c
View File

@ -38,7 +38,6 @@
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_seqadj.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>
@ -2477,13 +2476,7 @@ void nf_conntrack_cleanup_end(void)
kvfree(nf_conntrack_hash);
nf_conntrack_proto_fini();
nf_conntrack_seqadj_fini();
nf_conntrack_labels_fini();
nf_conntrack_helper_fini();
nf_conntrack_timeout_fini();
nf_conntrack_ecache_fini();
nf_conntrack_tstamp_fini();
nf_conntrack_acct_fini();
nf_conntrack_expect_fini();
kmem_cache_destroy(nf_conntrack_cachep);
@ -2689,34 +2682,10 @@ int nf_conntrack_init_start(void)
if (ret < 0)
goto err_expect;
ret = nf_conntrack_acct_init();
if (ret < 0)
goto err_acct;
ret = nf_conntrack_tstamp_init();
if (ret < 0)
goto err_tstamp;
ret = nf_conntrack_ecache_init();
if (ret < 0)
goto err_ecache;
ret = nf_conntrack_timeout_init();
if (ret < 0)
goto err_timeout;
ret = nf_conntrack_helper_init();
if (ret < 0)
goto err_helper;
ret = nf_conntrack_labels_init();
if (ret < 0)
goto err_labels;
ret = nf_conntrack_seqadj_init();
if (ret < 0)
goto err_seqadj;
ret = nf_conntrack_proto_init();
if (ret < 0)
goto err_proto;
@ -2734,20 +2703,8 @@ err_kfunc:
cancel_delayed_work_sync(&conntrack_gc_work.dwork);
nf_conntrack_proto_fini();
err_proto:
nf_conntrack_seqadj_fini();
err_seqadj:
nf_conntrack_labels_fini();
err_labels:
nf_conntrack_helper_fini();
err_helper:
nf_conntrack_timeout_fini();
err_timeout:
nf_conntrack_ecache_fini();
err_ecache:
nf_conntrack_tstamp_fini();
err_tstamp:
nf_conntrack_acct_fini();
err_acct:
nf_conntrack_expect_fini();
err_expect:
kmem_cache_destroy(nf_conntrack_cachep);

22
net/netfilter/nf_conntrack_ecache.c
View File

@ -304,10 +304,6 @@ void nf_conntrack_ecache_work(struct net *net, enum nf_ct_ecache_state state)
#define NF_CT_EVENTS_DEFAULT 1
static int nf_ct_events __read_mostly = NF_CT_EVENTS_DEFAULT;
static const struct nf_ct_ext_type event_extend = {
.id = NF_CT_EXT_ECACHE,
};
void nf_conntrack_ecache_pernet_init(struct net *net)
{
struct nf_conntrack_net *cnet = nf_ct_pernet(net);
@ -315,6 +311,8 @@ void nf_conntrack_ecache_pernet_init(struct net *net)
net->ct.sysctl_events = nf_ct_events;
cnet->ct_net = &net->ct;
INIT_DELAYED_WORK(&cnet->ecache_dwork, ecache_work);
BUILD_BUG_ON(__IPCT_MAX >= 16); /* ctmask, missed use u16 */
}
void nf_conntrack_ecache_pernet_fini(struct net *net)
@ -323,19 +321,3 @@ void nf_conntrack_ecache_pernet_fini(struct net *net)
cancel_delayed_work_sync(&cnet->ecache_dwork);
}
int nf_conntrack_ecache_init(void)
{
int ret = nf_ct_extend_register(&event_extend);
if (ret < 0)
pr_err("Unable to register event extension\n");
BUILD_BUG_ON(__IPCT_MAX >= 16); /* ctmask, missed use u16 */
return ret;
}
void nf_conntrack_ecache_fini(void)
{
nf_ct_extend_unregister(&event_extend);
}

35
net/netfilter/nf_conntrack_extend.c
View File

@ -25,8 +25,6 @@
#include <net/netfilter/nf_conntrack_act_ct.h>
#include <net/netfilter/nf_nat.h>
static struct nf_ct_ext_type __rcu *nf_ct_ext_types[NF_CT_EXT_NUM];
static DEFINE_MUTEX(nf_ct_ext_type_mutex);
#define NF_CT_EXT_PREALLOC 128u /* conntrack events are on by default */
static const u8 nf_ct_ext_type_len[NF_CT_EXT_NUM] = {
@ -97,6 +95,8 @@ void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
/* Conntrack must not be confirmed to avoid races on reallocation. */
WARN_ON(nf_ct_is_confirmed(ct));
/* struct nf_ct_ext uses u8 to store offsets/size */
BUILD_BUG_ON(total_extension_size() > 255u);
if (ct->ext) {
const struct nf_ct_ext *old = ct->ext;
@ -127,34 +127,3 @@ void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
return (void *)new + newoff;
}
EXPORT_SYMBOL(nf_ct_ext_add);
/* This MUST be called in process context. */
int nf_ct_extend_register(const struct nf_ct_ext_type *type)
{
int ret = 0;
/* struct nf_ct_ext uses u8 to store offsets/size */
BUILD_BUG_ON(total_extension_size() > 255u);
mutex_lock(&nf_ct_ext_type_mutex);
if (nf_ct_ext_types[type->id]) {
ret = -EBUSY;
goto out;
}
rcu_assign_pointer(nf_ct_ext_types[type->id], type);
out:
mutex_unlock(&nf_ct_ext_type_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(nf_ct_extend_register);
/* This MUST be called in process context. */
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);
mutex_unlock(&nf_ct_ext_type_mutex);
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(nf_ct_extend_unregister);

15
net/netfilter/nf_conntrack_helper.c
View File

@ -550,10 +550,6 @@ void nf_nat_helper_unregister(struct nf_conntrack_nat_helper *nat)
}
EXPORT_SYMBOL_GPL(nf_nat_helper_unregister);
static const struct nf_ct_ext_type helper_extend = {
.id = NF_CT_EXT_HELPER,
};
void nf_conntrack_helper_pernet_init(struct net *net)
{
struct nf_conntrack_net *cnet = nf_ct_pernet(net);
@ -563,28 +559,17 @@ void nf_conntrack_helper_pernet_init(struct net *net)
int nf_conntrack_helper_init(void)
{
int ret;
nf_ct_helper_hsize = 1; /* gets rounded up to use one page */
nf_ct_helper_hash =
nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0);
if (!nf_ct_helper_hash)
return -ENOMEM;
ret = nf_ct_extend_register(&helper_extend);
if (ret < 0) {
pr_err("nf_ct_helper: Unable to register helper extension.\n");
goto out_extend;
}
INIT_LIST_HEAD(&nf_ct_nat_helpers);
return 0;
out_extend:
kvfree(nf_ct_helper_hash);
return ret;
}
void nf_conntrack_helper_fini(void)
{
nf_ct_extend_unregister(&helper_extend);
kvfree(nf_ct_helper_hash);
}

18
net/netfilter/nf_conntrack_labels.c
View File

@ -67,6 +67,8 @@ int nf_connlabels_get(struct net *net, unsigned int bits)
net->ct.labels_used++;
spin_unlock(&nf_connlabels_lock);
BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE / sizeof(long) >= U8_MAX);
return 0;
}
EXPORT_SYMBOL_GPL(nf_connlabels_get);
@ -78,19 +80,3 @@ void nf_connlabels_put(struct net *net)
spin_unlock(&nf_connlabels_lock);
}
EXPORT_SYMBOL_GPL(nf_connlabels_put);
static const struct nf_ct_ext_type labels_extend = {
.id = NF_CT_EXT_LABELS,
};
int nf_conntrack_labels_init(void)
{
BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE / sizeof(long) >= U8_MAX);
return nf_ct_extend_register(&labels_extend);
}
void nf_conntrack_labels_fini(void)
{
nf_ct_extend_unregister(&labels_extend);
}

14
net/netfilter/nf_conntrack_seqadj.c
View File

@ -232,17 +232,3 @@ s32 nf_ct_seq_offset(const struct nf_conn *ct,
this_way->offset_after : this_way->offset_before;
}
EXPORT_SYMBOL_GPL(nf_ct_seq_offset);
static const struct nf_ct_ext_type nf_ct_seqadj_extend = {
.id = NF_CT_EXT_SEQADJ,
};
int nf_conntrack_seqadj_init(void)
{
return nf_ct_extend_register(&nf_ct_seqadj_extend);
}
void nf_conntrack_seqadj_fini(void)
{
nf_ct_extend_unregister(&nf_ct_seqadj_extend);
}

17
net/netfilter/nf_conntrack_timeout.c
View File

@ -134,20 +134,3 @@ void nf_ct_destroy_timeout(struct nf_conn *ct)
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(nf_ct_destroy_timeout);
static const struct nf_ct_ext_type timeout_extend = {
.id = NF_CT_EXT_TIMEOUT,
};
int nf_conntrack_timeout_init(void)
{
int ret = nf_ct_extend_register(&timeout_extend);
if (ret < 0)
pr_err("nf_ct_timeout: Unable to register timeout extension.\n");
return ret;
}
void nf_conntrack_timeout_fini(void)
{
nf_ct_extend_unregister(&timeout_extend);
}

18
net/netfilter/nf_conntrack_timestamp.c
View File

@ -19,25 +19,7 @@ static bool nf_ct_tstamp __read_mostly;
module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
static const struct nf_ct_ext_type tstamp_extend = {
.id = NF_CT_EXT_TSTAMP,
};
void nf_conntrack_tstamp_pernet_init(struct net *net)
{
net->ct.sysctl_tstamp = nf_ct_tstamp;
}
int nf_conntrack_tstamp_init(void)
{
int ret;
ret = nf_ct_extend_register(&tstamp_extend);
if (ret < 0)
pr_err("Unable to register extension\n");
return ret;
}
void nf_conntrack_tstamp_fini(void)
{
nf_ct_extend_unregister(&tstamp_extend);
}

13
net/netfilter/nf_nat_core.c
View File

@ -868,10 +868,6 @@ static int nf_nat_proto_clean(struct nf_conn *ct, void *data)
return 0;
}
static struct nf_ct_ext_type nat_extend __read_mostly = {
.id = NF_CT_EXT_NAT,
};
#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
#include <linux/netfilter/nfnetlink.h>
@ -1179,19 +1175,11 @@ static int __init nf_nat_init(void)
if (!nf_nat_bysource)
return -ENOMEM;
ret = nf_ct_extend_register(&nat_extend);
if (ret < 0) {
kvfree(nf_nat_bysource);
pr_err("Unable to register extension\n");
return ret;
}
for (i = 0; i < CONNTRACK_LOCKS; i++)
spin_lock_init(&nf_nat_locks[i]);
ret = register_pernet_subsys(&nat_net_ops);
if (ret < 0) {
nf_ct_extend_unregister(&nat_extend);
kvfree(nf_nat_bysource);
return ret;
}
@ -1210,7 +1198,6 @@ static void __exit nf_nat_cleanup(void)
nf_ct_iterate_destroy(nf_nat_proto_clean, &clean);
nf_ct_extend_unregister(&nat_extend);
nf_ct_helper_expectfn_unregister(&follow_master_nat);
RCU_INIT_POINTER(nf_nat_hook, NULL);

22
net/netfilter/nf_synproxy_core.c
View File

@ -236,10 +236,6 @@ synproxy_tstamp_adjust(struct sk_buff *skb, unsigned int protoff,
return 1;
}
static struct nf_ct_ext_type nf_ct_synproxy_extend __read_mostly = {
.id = NF_CT_EXT_SYNPROXY,
};
#ifdef CONFIG_PROC_FS
static void *synproxy_cpu_seq_start(struct seq_file *seq, loff_t *pos)
{
@ -385,28 +381,12 @@ static struct pernet_operations synproxy_net_ops = {
static int __init synproxy_core_init(void)
{
int err;
err = nf_ct_extend_register(&nf_ct_synproxy_extend);
if (err < 0)
goto err1;
err = register_pernet_subsys(&synproxy_net_ops);
if (err < 0)
goto err2;
return 0;
err2:
nf_ct_extend_unregister(&nf_ct_synproxy_extend);
err1:
return err;
return register_pernet_subsys(&synproxy_net_ops);
}
static void __exit synproxy_core_exit(void)
{
unregister_pernet_subsys(&synproxy_net_ops);
nf_ct_extend_unregister(&nf_ct_synproxy_extend);
}
module_init(synproxy_core_init);

11
net/sched/act_ct.c
View File

@ -57,10 +57,6 @@ static const struct rhashtable_params zones_params = {
.automatic_shrinking = true,
};
static struct nf_ct_ext_type act_ct_extend __read_mostly = {
.id = NF_CT_EXT_ACT_CT,
};
static struct flow_action_entry *
tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action)
{
@ -1606,16 +1602,10 @@ static int __init ct_init_module(void)
if (err)
goto err_register;
err = nf_ct_extend_register(&act_ct_extend);
if (err)
goto err_register_extend;
static_branch_inc(&tcf_frag_xmit_count);
return 0;
err_register_extend:
tcf_unregister_action(&act_ct_ops, &ct_net_ops);
err_register:
tcf_ct_flow_tables_uninit();
err_tbl_init:
@ -1626,7 +1616,6 @@ err_tbl_init:
static void __exit ct_cleanup_module(void)
{
static_branch_dec(&tcf_frag_xmit_count);
nf_ct_extend_unregister(&act_ct_extend);
tcf_unregister_action(&act_ct_ops, &ct_net_ops);
tcf_ct_flow_tables_uninit();
destroy_workqueue(act_ct_wq);