net/l2tp/l2tp_netlink.c

File Facts

System

Linux kernel

Corpus path

net/l2tp/l2tp_netlink.c

Extension

.c

Size

27877 bytes

Lines

1061

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• net/sock.h
• net/genetlink.h
• net/udp.h
• linux/in.h
• linux/udp.h
• linux/socket.h
• linux/module.h
• linux/list.h
• net/net_namespace.h
• linux/l2tp.h
• l2tp_core.h

Detected Declarations

• struct l2tp_nl_cb_data
• function l2tp_nl_cmd_noop
• function l2tp_tunnel_notify
• function l2tp_session_notify
• function l2tp_nl_cmd_tunnel_create_get_addr
• function l2tp_nl_cmd_tunnel_create
• function l2tp_nl_cmd_tunnel_delete
• function l2tp_nl_cmd_tunnel_modify
• function l2tp_nl_tunnel_send_addr6
• function l2tp_nl_tunnel_send_addr4
• function l2tp_nl_tunnel_send_addr
• function l2tp_nl_tunnel_send
• function l2tp_nl_cmd_tunnel_get
• function l2tp_nl_cmd_tunnel_dump
• function l2tp_nl_cmd_session_create
• function l2tp_nl_cmd_session_delete
• function l2tp_nl_cmd_session_modify
• function l2tp_nl_session_send
• function l2tp_nl_cmd_session_get
• function l2tp_nl_cmd_session_dump
• function l2tp_nl_register_ops
• function l2tp_nl_unregister_ops
• function l2tp_nl_init
• function l2tp_nl_cleanup
• module init l2tp_nl_init
• export l2tp_nl_register_ops
• export l2tp_nl_unregister_ops

Annotated Snippet

module_init(l2tp_nl_init);
module_exit(l2tp_nl_cleanup);

MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
MODULE_DESCRIPTION("L2TP netlink");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0");
MODULE_ALIAS_GENL_FAMILY("l2tp");

Annotation

• Immediate include surface: `net/sock.h`, `net/genetlink.h`, `net/udp.h`, `linux/in.h`, `linux/udp.h`, `linux/socket.h`, `linux/module.h`, `linux/list.h`.
• Detected declarations: `struct l2tp_nl_cb_data`, `function l2tp_nl_cmd_noop`, `function l2tp_tunnel_notify`, `function l2tp_session_notify`, `function l2tp_nl_cmd_tunnel_create_get_addr`, `function l2tp_nl_cmd_tunnel_create`, `function l2tp_nl_cmd_tunnel_delete`, `function l2tp_nl_cmd_tunnel_modify`, `function l2tp_nl_tunnel_send_addr6`, `function l2tp_nl_tunnel_send_addr4`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.