net/sched/cls_flow.c

File Facts

System

Linux kernel

Corpus path

net/sched/cls_flow.c

Extension

.c

Size

17285 bytes

Lines

738

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/kernel.h
• linux/init.h
• linux/list.h
• linux/jhash.h
• linux/random.h
• linux/pkt_cls.h
• linux/skbuff.h
• linux/in.h
• linux/ip.h
• linux/ipv6.h
• linux/if_vlan.h
• linux/slab.h
• linux/module.h
• net/inet_sock.h
• net/pkt_cls.h
• linux/siphash.h
• net/ip.h
• net/route.h
• net/flow_dissector.h
• net/tc_wrapper.h
• net/netfilter/nf_conntrack.h

Detected Declarations

• struct flow_head
• struct flow_filter
• function addr_fold
• function flow_get_src
• function flow_get_dst
• function flow_get_proto
• function flow_get_proto_src
• function flow_get_proto_dst
• function flow_get_iif
• function flow_get_priority
• function flow_get_mark
• function flow_get_nfct
• function flow_get_nfct_src
• function flow_get_nfct_dst
• function flow_get_nfct_proto_src
• function flow_get_nfct_proto_dst
• function flow_get_rtclassid
• function flow_get_skuid
• function flow_get_skgid
• function flow_get_vlan_tag
• function flow_get_rxhash
• function flow_key_get
• function flow_classify
• function list_for_each_entry_rcu
• function flow_perturbation
• function __flow_destroy_filter
• function flow_destroy_filter_work
• function flow_change
• function flow_delete
• function flow_init
• function flow_destroy
• function list_for_each_entry_safe
• function flow_dump
• function flow_walk
• function list_for_each_entry
• function cls_flow_init
• function cls_flow_exit
• module init cls_flow_init

Annotated Snippet

module_init(cls_flow_init);
module_exit(cls_flow_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("TC flow classifier");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/list.h`, `linux/jhash.h`, `linux/random.h`, `linux/pkt_cls.h`, `linux/skbuff.h`, `linux/in.h`.
• Detected declarations: `struct flow_head`, `struct flow_filter`, `function addr_fold`, `function flow_get_src`, `function flow_get_dst`, `function flow_get_proto`, `function flow_get_proto_src`, `function flow_get_proto_dst`, `function flow_get_iif`, `function flow_get_priority`.
• 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.