net/sched/sch_fq_pie.c

File Facts

System

Linux kernel

Corpus path

net/sched/sch_fq_pie.c

Extension

.c

Size

15700 bytes

Lines

596

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.
• 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/jhash.h
• linux/module.h
• linux/sizes.h
• linux/vmalloc.h
• net/pkt_cls.h
• net/pie.h

Detected Declarations

• struct fq_pie_flow
• struct fq_pie_sched_data
• function fq_pie_hash
• function fq_pie_classify
• function flow_queue_add
• function fq_pie_qdisc_enqueue
• function INET_ECN_set_ce
• function fq_pie_change
• function fq_pie_timer
• function fq_pie_init
• function fq_pie_dump
• function fq_pie_dump_stats
• function fq_pie_reset
• function fq_pie_destroy
• function fq_pie_module_init
• function fq_pie_module_exit
• module init fq_pie_module_init

Annotated Snippet

module_init(fq_pie_module_init);
module_exit(fq_pie_module_exit);

MODULE_DESCRIPTION("Flow Queue Proportional Integral controller Enhanced (FQ-PIE)");
MODULE_AUTHOR("Mohit P. Tahiliani");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/jhash.h`, `linux/module.h`, `linux/sizes.h`, `linux/vmalloc.h`, `net/pkt_cls.h`, `net/pie.h`.
• Detected declarations: `struct fq_pie_flow`, `struct fq_pie_sched_data`, `function fq_pie_hash`, `function fq_pie_classify`, `function flow_queue_add`, `function fq_pie_qdisc_enqueue`, `function INET_ECN_set_ce`, `function fq_pie_change`, `function fq_pie_timer`, `function fq_pie_init`.
• 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.