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6ae7989c9a
nf_ct_put() results in a usesless indirection: nf_ct_put -> nf_conntrack_put -> nf_conntrack_destroy -> rcu readlock + indirect call of ct_hooks->destroy(). There are two _put helpers: nf_ct_put and nf_conntrack_put. The latter is what should be used in code that MUST NOT cause a linker dependency on the conntrack module (e.g. calls from core network stack). Everyone else should call nf_ct_put() instead. A followup patch will convert a few nf_conntrack_put() calls to nf_ct_put(), in particular from modules that already have a conntrack dependency such as act_ct or even nf_conntrack itself. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
45 lines
1 KiB
C
45 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NF_CONNTRACK_COMMON_H
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#define _NF_CONNTRACK_COMMON_H
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#include <linux/refcount.h>
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#include <uapi/linux/netfilter/nf_conntrack_common.h>
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struct ip_conntrack_stat {
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unsigned int found;
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unsigned int invalid;
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unsigned int insert;
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unsigned int insert_failed;
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unsigned int clash_resolve;
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unsigned int drop;
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unsigned int early_drop;
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unsigned int error;
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unsigned int expect_new;
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unsigned int expect_create;
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unsigned int expect_delete;
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unsigned int search_restart;
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unsigned int chaintoolong;
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};
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#define NFCT_INFOMASK 7UL
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#define NFCT_PTRMASK ~(NFCT_INFOMASK)
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struct nf_conntrack {
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refcount_t use;
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};
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void nf_conntrack_destroy(struct nf_conntrack *nfct);
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/* like nf_ct_put, but without module dependency on nf_conntrack */
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static inline void nf_conntrack_put(struct nf_conntrack *nfct)
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{
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if (nfct && refcount_dec_and_test(&nfct->use))
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nf_conntrack_destroy(nfct);
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}
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static inline void nf_conntrack_get(struct nf_conntrack *nfct)
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{
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if (nfct)
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refcount_inc(&nfct->use);
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}
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#endif /* _NF_CONNTRACK_COMMON_H */
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