c1ebd7dff7
This patch introduces nf_conntrack_l4proto_find_get() and nf_conntrack_l4proto_put() to fix module dependencies between timeout objects and l4-protocol conntrack modules. Thus, we make sure that the module cannot be removed if it is used by any of the cttimeout objects. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
#ifndef _NF_CONNTRACK_TIMEOUT_H
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#define _NF_CONNTRACK_TIMEOUT_H
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#include <net/net_namespace.h>
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#include <linux/netfilter/nf_conntrack_common.h>
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#include <linux/netfilter/nf_conntrack_tuple_common.h>
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#include <net/netfilter/nf_conntrack.h>
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#include <net/netfilter/nf_conntrack_extend.h>
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#define CTNL_TIMEOUT_NAME_MAX 32
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struct ctnl_timeout {
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struct list_head head;
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struct rcu_head rcu_head;
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atomic_t refcnt;
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char name[CTNL_TIMEOUT_NAME_MAX];
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__u16 l3num;
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struct nf_conntrack_l4proto *l4proto;
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char data[0];
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};
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struct nf_conn_timeout {
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struct ctnl_timeout *timeout;
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};
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#define NF_CT_TIMEOUT_EXT_DATA(__t) (unsigned int *) &((__t)->timeout->data)
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static inline
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struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct)
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{
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#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
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return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT);
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#else
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return NULL;
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#endif
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}
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static inline
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struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct,
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struct ctnl_timeout *timeout,
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gfp_t gfp)
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{
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#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
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struct nf_conn_timeout *timeout_ext;
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timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp);
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if (timeout_ext == NULL)
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return NULL;
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timeout_ext->timeout = timeout;
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return timeout_ext;
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#else
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return NULL;
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#endif
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};
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#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
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extern int nf_conntrack_timeout_init(struct net *net);
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extern void nf_conntrack_timeout_fini(struct net *net);
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#else
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static inline int nf_conntrack_timeout_init(struct net *net)
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{
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return 0;
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}
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static inline void nf_conntrack_timeout_fini(struct net *net)
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{
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return;
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}
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#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
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#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
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extern struct ctnl_timeout *(*nf_ct_timeout_find_get_hook)(const char *name);
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extern void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout);
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#endif
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#endif /* _NF_CONNTRACK_TIMEOUT_H */
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