net/netfilter/nf_tables_api.c

File Facts

System

Linux kernel

Corpus path

net/netfilter/nf_tables_api.c

Extension

.c

Size

308799 bytes

Lines

12285

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.
• 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/module.h
• linux/init.h
• linux/list.h
• linux/skbuff.h
• linux/netlink.h
• linux/vmalloc.h
• linux/rhashtable.h
• linux/audit.h
• linux/netfilter.h
• linux/netfilter_ipv4.h
• linux/netfilter/nfnetlink.h
• linux/netfilter/nf_tables.h
• net/netfilter/nf_flow_table.h
• net/netfilter/nf_tables_core.h
• net/netfilter/nf_tables.h
• net/netfilter/nf_tables_offload.h
• net/net_namespace.h
• net/sock.h

Detected Declarations

• struct nft_audit_data
• struct nft_set_elem_catchall
• struct nft_module_request
• struct nftnl_skb_parms
• struct nft_hook_dump_ctx
• struct nft_chain_hook
• struct nft_expr_info
• struct nft_rule_dump_ctx
• struct nft_set_dump_args
• struct nft_set_dump_ctx
• struct nft_obj_dump_ctx
• struct nft_flowtable_hook
• struct nft_flowtable_filter
• function nft_validate_state_update
• function nft_chain_vstate_valid
• function nft_ctx_init
• function nft_trans_list_del
• function nft_trans_destroy
• function __nft_set_trans_bind
• function nft_set_trans_bind
• function nft_set_trans_unbind
• function __nft_chain_trans_bind
• function nft_chain_trans_bind
• function nf_tables_bind_chain
• function nf_tables_unbind_chain
• function nft_netdev_register_hooks
• function list_for_each_entry
• function list_for_each_entry
• function nft_netdev_hook_free_ops
• function list_for_each_entry_safe
• function nft_netdev_hook_free
• function __nft_netdev_hook_free_rcu
• function nft_netdev_hook_free_rcu
• function nft_netdev_hook_unlink_free_rcu
• function nft_trans_hook_destroy
• function nft_netdev_unregister_trans_hook
• function list_for_each_entry_safe
• function nft_netdev_unregister_hooks
• function list_for_each_entry_safe
• function nf_tables_register_hook
• function __nf_tables_unregister_hook
• function nf_tables_unregister_hook
• function nft_trans_collapse_set_elem_allowed
• function nft_trans_collapse_set_elem
• function nft_trans_try_collapse
• function nft_trans_commit_list_add_tail
• function nft_trans_commit_list_add_elem
• function nft_trans_table_add

Annotated Snippet

module_init(nf_tables_module_init);
module_exit(nf_tables_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("Framework for packet filtering and classification");
MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_NFTABLES);

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/list.h`, `linux/skbuff.h`, `linux/netlink.h`, `linux/vmalloc.h`, `linux/rhashtable.h`, `linux/audit.h`.
• Detected declarations: `struct nft_audit_data`, `struct nft_set_elem_catchall`, `struct nft_module_request`, `struct nftnl_skb_parms`, `struct nft_hook_dump_ctx`, `struct nft_chain_hook`, `struct nft_expr_info`, `struct nft_rule_dump_ctx`, `struct nft_set_dump_args`, `struct nft_set_dump_ctx`.
• 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.