net/mpls/mpls_iptunnel.c

File Facts

System

Linux kernel

Corpus path

net/mpls/mpls_iptunnel.c

Extension

.c

Size

7951 bytes

Lines

304

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/skbuff.h
• linux/net.h
• linux/module.h
• linux/mpls.h
• linux/vmalloc.h
• net/ip.h
• net/dst.h
• net/lwtunnel.h
• net/netevent.h
• net/netns/generic.h
• net/ip6_fib.h
• net/route.h
• net/mpls_iptunnel.h
• linux/mpls_iptunnel.h
• internal.h

Detected Declarations

• function mpls_encap_size
• function mpls_xmit
• function mpls_build_state
• function mpls_fill_encap_info
• function mpls_encap_nlsize
• function mpls_encap_cmp
• function mpls_iptunnel_init
• function mpls_iptunnel_exit
• module init mpls_iptunnel_init

Annotated Snippet

module_init(mpls_iptunnel_init);

static void __exit mpls_iptunnel_exit(void)
{
	lwtunnel_encap_del_ops(&mpls_iptun_ops, LWTUNNEL_ENCAP_MPLS);
}
module_exit(mpls_iptunnel_exit);

MODULE_ALIAS_RTNL_LWT(MPLS);
MODULE_SOFTDEP("post: mpls_gso");
MODULE_DESCRIPTION("MultiProtocol Label Switching IP Tunnels");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/types.h`, `linux/skbuff.h`, `linux/net.h`, `linux/module.h`, `linux/mpls.h`, `linux/vmalloc.h`, `net/ip.h`, `net/dst.h`.
• Detected declarations: `function mpls_encap_size`, `function mpls_xmit`, `function mpls_build_state`, `function mpls_fill_encap_info`, `function mpls_encap_nlsize`, `function mpls_encap_cmp`, `function mpls_iptunnel_init`, `function mpls_iptunnel_exit`, `module init mpls_iptunnel_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.