net/sched/sch_dualpi2.c

File Facts

System

Linux kernel

Corpus path

net/sched/sch_dualpi2.c

Extension

.c

Size

36024 bytes

Lines

1238

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/errno.h
• linux/hrtimer.h
• linux/if_vlan.h
• linux/kernel.h
• linux/limits.h
• linux/module.h
• linux/skbuff.h
• linux/types.h
• net/gso.h
• net/inet_ecn.h
• net/pkt_cls.h
• net/pkt_sched.h

Detected Declarations

• struct dualpi2_sched_data
• struct dualpi2_skb_cb
• enum dualpi2_classification_results
• function dualpi2_sojourn_time
• function head_enqueue_time
• function dualpi2_scale_alpha_beta
• function dualpi2_unscale_alpha_beta
• function next_pi2_timeout
• function skb_is_l4s
• function skb_in_l_queue
• function skb_apply_step
• function dualpi2_mark
• function dualpi2_reset_c_protection
• function queue
• function dualpi2_roll
• function probability
• function overload
• function must_drop
• function dualpi2_read_ect
• function dualpi2_skb_classify
• function dualpi2_enqueue_skb
• function fate
• function skb_list_walk_safe
• function qdisc_bstats_update
• function do_step_aqm
• function drop_and_retry
• function dualpi2_dequeue_drop
• function __scale_delta
• function get_queue_delays
• function calculate_probability
• function get_memory_limit
• function convert_us_to_nsec
• function convert_ns_to_usec
• function dualpi2_timer
• function dualpi2_change
• function dualpi2_reset_default
• function dualpi2_init
• function dualpi2_dump
• function dualpi2_dump_stats
• function dualpi2_reset
• function dualpi2_destroy
• function dualpi2_find
• function dualpi2_bind
• function dualpi2_unbind
• function dualpi2_walk
• function dualpi2_module_init
• function dualpi2_module_exit
• module init dualpi2_module_init

Annotated Snippet

module_init(dualpi2_module_init);
module_exit(dualpi2_module_exit);

MODULE_DESCRIPTION("Dual Queue with Proportional Integral controller Improved with a Square (dualpi2) scheduler");
MODULE_AUTHOR("Koen De Schepper <koen.de_schepper@nokia-bell-labs.com>");
MODULE_AUTHOR("Chia-Yu Chang <chia-yu.chang@nokia-bell-labs.com>");
MODULE_AUTHOR("Olga Albisser <olga@albisser.org>");
MODULE_AUTHOR("Henrik Steen <henrist@henrist.net>");
MODULE_AUTHOR("Olivier Tilmans <olivier.tilmans@nokia.com>");

MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION("1.0");

Annotation

• Immediate include surface: `linux/errno.h`, `linux/hrtimer.h`, `linux/if_vlan.h`, `linux/kernel.h`, `linux/limits.h`, `linux/module.h`, `linux/skbuff.h`, `linux/types.h`.
• Detected declarations: `struct dualpi2_sched_data`, `struct dualpi2_skb_cb`, `enum dualpi2_classification_results`, `function dualpi2_sojourn_time`, `function head_enqueue_time`, `function dualpi2_scale_alpha_beta`, `function dualpi2_unscale_alpha_beta`, `function next_pi2_timeout`, `function skb_is_l4s`, `function skb_in_l_queue`.
• 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.