include/linux/netfilter/nf_conntrack_common.h

File Facts

System

Linux kernel

Corpus path

include/linux/netfilter/nf_conntrack_common.h

Extension

.h

Size

1068 bytes

Lines

46

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/refcount.h
• uapi/linux/netfilter/nf_conntrack_common.h

Detected Declarations

• struct ip_conntrack_stat
• struct nf_conntrack
• function nf_conntrack_put
• function nf_conntrack_get

Annotated Snippet

struct ip_conntrack_stat {
	unsigned int found;
	unsigned int invalid;
	unsigned int insert;
	unsigned int insert_failed;
	unsigned int clash_resolve;
	unsigned int drop;
	unsigned int early_drop;
	unsigned int error;
	unsigned int expect_new;
	unsigned int expect_create;
	unsigned int expect_delete;
	unsigned int search_restart;
	unsigned int chaintoolong;
};

#define NFCT_INFOMASK	7UL
#define NFCT_PTRMASK	~(NFCT_INFOMASK)

struct nf_conntrack {
	refcount_t use;
};

void nf_conntrack_destroy(struct nf_conntrack *nfct);

/* like nf_ct_put, but without module dependency on nf_conntrack */
static inline void nf_conntrack_put(struct nf_conntrack *nfct)
{
	if (nfct && refcount_dec_and_test(&nfct->use))
		nf_conntrack_destroy(nfct);
}
static inline void nf_conntrack_get(struct nf_conntrack *nfct)
{
	if (nfct)
		refcount_inc(&nfct->use);
}

#endif /* _NF_CONNTRACK_COMMON_H */

Annotation

• Immediate include surface: `linux/refcount.h`, `uapi/linux/netfilter/nf_conntrack_common.h`.
• Detected declarations: `struct ip_conntrack_stat`, `struct nf_conntrack`, `function nf_conntrack_put`, `function nf_conntrack_get`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.