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netfilter: cttimeout: decouple timeout policy from nfnetlink_cttimeout object

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The timeout policy is currently embedded into the nfnetlink_cttimeout
object, move the policy into an independent object. This allows us to
reuse part of the existing conntrack timeout extension from nf_tables
without adding dependencies with the nfnetlink_cttimeout object layout.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2018-08-07 17:14:15 +02:00
commit 6c1fd7dc48
4 changed files with 39 additions and 30 deletions
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26
include/net/netfilter/nf_conntrack_timeout.h
View file

@ -11,24 +11,28 @@
#define CTNL_TIMEOUT_NAME_MAX 32
struct ctnl_timeout {
struct list_head head;
struct rcu_head rcu_head;
refcount_t refcnt;
char name[CTNL_TIMEOUT_NAME_MAX];
struct nf_ct_timeout {
__u16 l3num;
const struct nf_conntrack_l4proto *l4proto;
char data[0];
};
struct ctnl_timeout {
struct list_head head;
struct rcu_head rcu_head;
refcount_t refcnt;
char name[CTNL_TIMEOUT_NAME_MAX];
struct nf_ct_timeout timeout;
};
struct nf_conn_timeout {
struct ctnl_timeout __rcu *timeout;
struct nf_ct_timeout __rcu *timeout;
};
static inline unsigned int *
nf_ct_timeout_data(struct nf_conn_timeout *t)
{
struct ctnl_timeout *timeout;
struct nf_ct_timeout *timeout;
timeout = rcu_dereference(t->timeout);
if (timeout == NULL)
@ -49,7 +53,7 @@ struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct)
static inline
struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct,
struct ctnl_timeout *timeout,
struct nf_ct_timeout *timeout,
gfp_t gfp)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
@ -83,7 +87,7 @@ 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 ctnl_timeout *timeout);
void nf_ct_untimeout(struct net *net, struct nf_ct_timeout *timeout);
#else
static inline int nf_conntrack_timeout_init(void)
{
@ -97,8 +101,8 @@ static inline void nf_conntrack_timeout_fini(void)
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
extern struct ctnl_timeout *(*nf_ct_timeout_find_get_hook)(struct net *net, const char *name);
extern void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout);
extern struct nf_ct_timeout *(*nf_ct_timeout_find_get_hook)(struct net *net, const char *name);
extern void (*nf_ct_timeout_put_hook)(struct nf_ct_timeout *timeout);
#endif
#endif /* _NF_CONNTRACK_TIMEOUT_H */