net/netfilter/nft_tunnel.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/nft_tunnel.c

Extension

.c

Size

20095 bytes

Lines

730

Domain

Networking Core

Bucket

Sockets, Protocols, Packet Path, And Network Policy

Inferred role

Networking Core: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

• Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/init.h
• linux/module.h
• linux/seqlock.h
• linux/netlink.h
• linux/netfilter.h
• linux/netfilter/nf_tables.h
• net/netfilter/nf_tables.h
• net/dst_metadata.h
• net/ip_tunnels.h
• net/vxlan.h
• net/erspan.h
• net/geneve.h

Detected Declarations

• struct nft_tunnel
• struct nft_tunnel_opts
• struct nft_tunnel_obj
• function nft_tunnel_get_eval
• function nft_tunnel_get_init
• function nft_tunnel_get_dump
• function nft_tunnel_obj_ip_init
• function nft_tunnel_obj_ip6_init
• function nft_tunnel_obj_vxlan_init
• function nft_tunnel_obj_erspan_init
• function nft_tunnel_obj_geneve_init
• function nft_tunnel_obj_opts_init
• function nla_for_each_attr
• function nft_tunnel_obj_init
• function nft_tunnel_obj_eval
• function nft_tunnel_ip_dump
• function nft_tunnel_opts_dump
• function nft_tunnel_ports_dump
• function nft_tunnel_flags_dump
• function nft_tunnel_obj_dump
• function nft_tunnel_obj_destroy
• function nft_tunnel_module_init
• function nft_tunnel_module_exit
• module init nft_tunnel_module_init

Annotated Snippet

module_init(nft_tunnel_module_init);
module_exit(nft_tunnel_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
MODULE_ALIAS_NFT_EXPR("tunnel");
MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_TUNNEL);
MODULE_DESCRIPTION("nftables tunnel expression support");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/module.h`, `linux/seqlock.h`, `linux/netlink.h`, `linux/netfilter.h`, `linux/netfilter/nf_tables.h`, `net/netfilter/nf_tables.h`.
• Detected declarations: `struct nft_tunnel`, `struct nft_tunnel_opts`, `struct nft_tunnel_obj`, `function nft_tunnel_get_eval`, `function nft_tunnel_get_init`, `function nft_tunnel_get_dump`, `function nft_tunnel_obj_ip_init`, `function nft_tunnel_obj_ip6_init`, `function nft_tunnel_obj_vxlan_init`, `function nft_tunnel_obj_erspan_init`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration 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.