net/netfilter/nft_flow_offload.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/nft_flow_offload.c

Extension

.c

Size

7171 bytes

Lines

288

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/etherdevice.h
• linux/kernel.h
• linux/module.h
• linux/init.h
• linux/netlink.h
• linux/netfilter.h
• linux/workqueue.h
• linux/spinlock.h
• linux/netfilter/nf_conntrack_common.h
• linux/netfilter/nf_tables.h
• net/ip.h
• net/flow.h
• net/netfilter/nf_tables.h
• net/netfilter/nf_tables_core.h
• net/netfilter/nf_conntrack_core.h
• net/netfilter/nf_conntrack_extend.h
• net/netfilter/nf_flow_table.h

Detected Declarations

• struct nft_flow_offload
• function nft_flow_offload_skip
• function flow_offload_ct_tcp
• function nft_flow_offload_eval
• function nft_flow_offload_validate
• function nft_flow_offload_init
• function nft_flow_offload_deactivate
• function nft_flow_offload_activate
• function nft_flow_offload_destroy
• function nft_flow_offload_dump
• function flow_offload_netdev_event
• function nft_flow_offload_module_init
• function nft_flow_offload_module_exit
• module init nft_flow_offload_module_init

Annotated Snippet

module_init(nft_flow_offload_module_init);
module_exit(nft_flow_offload_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
MODULE_ALIAS_NFT_EXPR("flow_offload");
MODULE_DESCRIPTION("nftables hardware flow offload module");

Annotation

• Immediate include surface: `linux/etherdevice.h`, `linux/kernel.h`, `linux/module.h`, `linux/init.h`, `linux/netlink.h`, `linux/netfilter.h`, `linux/workqueue.h`, `linux/spinlock.h`.
• Detected declarations: `struct nft_flow_offload`, `function nft_flow_offload_skip`, `function flow_offload_ct_tcp`, `function nft_flow_offload_eval`, `function nft_flow_offload_validate`, `function nft_flow_offload_init`, `function nft_flow_offload_deactivate`, `function nft_flow_offload_activate`, `function nft_flow_offload_destroy`, `function nft_flow_offload_dump`.
• 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.

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.