net/xfrm/xfrm_compat.c

File Facts

System

Linux kernel

Corpus path

net/xfrm/xfrm_compat.c

Extension

.c

Size

20521 bytes

Lines

692

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/compat.h
• linux/nospec.h
• linux/xfrm.h
• net/xfrm.h

Detected Declarations

• struct compat_xfrm_lifetime_cfg
• struct compat_xfrm_lifetime_cur
• struct compat_xfrm_userpolicy_info
• struct compat_xfrm_usersa_info
• struct compat_xfrm_user_acquire
• struct compat_xfrm_userspi_info
• struct compat_xfrm_user_expire
• struct compat_xfrm_user_polexpire
• function xfrm_nla_cpy
• function xfrm_xlate64_attr
• function xfrm_xlate64
• function nla_for_each_attr
• function xfrm_alloc_compat
• function xfrm_user_rcv_calculate_len64
• function xfrm_attr_cpy32
• function xfrm_xlate32_attr
• function xfrm_xlate32
• function xfrm_user_policy_compat
• function xfrm_compat_init
• function xfrm_compat_exit
• module init xfrm_compat_init

Annotated Snippet

module_init(xfrm_compat_init);
module_exit(xfrm_compat_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dmitry Safonov");
MODULE_DESCRIPTION("XFRM 32-bit compatibility layer");

Annotation

• Immediate include surface: `linux/compat.h`, `linux/nospec.h`, `linux/xfrm.h`, `net/xfrm.h`.
• Detected declarations: `struct compat_xfrm_lifetime_cfg`, `struct compat_xfrm_lifetime_cur`, `struct compat_xfrm_userpolicy_info`, `struct compat_xfrm_usersa_info`, `struct compat_xfrm_user_acquire`, `struct compat_xfrm_userspi_info`, `struct compat_xfrm_user_expire`, `struct compat_xfrm_user_polexpire`, `function xfrm_nla_cpy`, `function xfrm_xlate64_attr`.
• 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.