net/mac80211/airtime.c

Source file repositories/reference/linux-study-clean/net/mac80211/airtime.c

File Facts

System: Linux kernel
Corpus path: net/mac80211/airtime.c
Extension: .c
Size: 23740 bytes
Lines: 838
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.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

net/mac80211.h
ieee80211_i.h
sta_info.h

Detected Declarations

struct mcs_group
function ieee80211_calc_legacy_rate_duration
function ieee80211_get_rate_duration
function ieee80211_calc_rx_airtime
function ieee80211_fill_rate_info
function ieee80211_fill_rx_status
function ieee80211_calc_tx_airtime_rate
function ieee80211_calc_tx_airtime
function ieee80211_calc_expected_tx_airtime
export ieee80211_calc_rx_airtime
export ieee80211_calc_tx_airtime

Annotated Snippet

struct mcs_group {
	u8 shift;
	u16 duration[MCS_GROUP_RATES];
};

static const struct mcs_group airtime_mcs_groups[] = {
	MCS_GROUP(1, 0, BW_20),
	MCS_GROUP(2, 0, BW_20),
	MCS_GROUP(3, 0, BW_20),
	MCS_GROUP(4, 0, BW_20),

	MCS_GROUP(1, 1, BW_20),
	MCS_GROUP(2, 1, BW_20),
	MCS_GROUP(3, 1, BW_20),
	MCS_GROUP(4, 1, BW_20),

	MCS_GROUP(1, 0, BW_40),
	MCS_GROUP(2, 0, BW_40),
	MCS_GROUP(3, 0, BW_40),
	MCS_GROUP(4, 0, BW_40),

	MCS_GROUP(1, 1, BW_40),
	MCS_GROUP(2, 1, BW_40),
	MCS_GROUP(3, 1, BW_40),
	MCS_GROUP(4, 1, BW_40),

	VHT_GROUP(1, 0, BW_20),
	VHT_GROUP(2, 0, BW_20),
	VHT_GROUP(3, 0, BW_20),
	VHT_GROUP(4, 0, BW_20),

	VHT_GROUP(1, 1, BW_20),
	VHT_GROUP(2, 1, BW_20),
	VHT_GROUP(3, 1, BW_20),
	VHT_GROUP(4, 1, BW_20),

	VHT_GROUP(1, 0, BW_40),
	VHT_GROUP(2, 0, BW_40),
	VHT_GROUP(3, 0, BW_40),
	VHT_GROUP(4, 0, BW_40),

	VHT_GROUP(1, 1, BW_40),
	VHT_GROUP(2, 1, BW_40),
	VHT_GROUP(3, 1, BW_40),
	VHT_GROUP(4, 1, BW_40),

	VHT_GROUP(1, 0, BW_80),
	VHT_GROUP(2, 0, BW_80),
	VHT_GROUP(3, 0, BW_80),
	VHT_GROUP(4, 0, BW_80),

	VHT_GROUP(1, 1, BW_80),
	VHT_GROUP(2, 1, BW_80),
	VHT_GROUP(3, 1, BW_80),
	VHT_GROUP(4, 1, BW_80),

	VHT_GROUP(1, 0, BW_160),
	VHT_GROUP(2, 0, BW_160),
	VHT_GROUP(3, 0, BW_160),
	VHT_GROUP(4, 0, BW_160),

	VHT_GROUP(1, 1, BW_160),
	VHT_GROUP(2, 1, BW_160),
	VHT_GROUP(3, 1, BW_160),
	VHT_GROUP(4, 1, BW_160),

	HE_GROUP(1, HE_GI_08, BW_20),
	HE_GROUP(2, HE_GI_08, BW_20),
	HE_GROUP(3, HE_GI_08, BW_20),
	HE_GROUP(4, HE_GI_08, BW_20),
	HE_GROUP(5, HE_GI_08, BW_20),
	HE_GROUP(6, HE_GI_08, BW_20),
	HE_GROUP(7, HE_GI_08, BW_20),
	HE_GROUP(8, HE_GI_08, BW_20),

	HE_GROUP(1, HE_GI_16, BW_20),
	HE_GROUP(2, HE_GI_16, BW_20),
	HE_GROUP(3, HE_GI_16, BW_20),
	HE_GROUP(4, HE_GI_16, BW_20),
	HE_GROUP(5, HE_GI_16, BW_20),
	HE_GROUP(6, HE_GI_16, BW_20),
	HE_GROUP(7, HE_GI_16, BW_20),
	HE_GROUP(8, HE_GI_16, BW_20),

	HE_GROUP(1, HE_GI_32, BW_20),
	HE_GROUP(2, HE_GI_32, BW_20),
	HE_GROUP(3, HE_GI_32, BW_20),
	HE_GROUP(4, HE_GI_32, BW_20),
	HE_GROUP(5, HE_GI_32, BW_20),
	HE_GROUP(6, HE_GI_32, BW_20),

Annotation

Immediate include surface: `net/mac80211.h`, `ieee80211_i.h`, `sta_info.h`.
Detected declarations: `struct mcs_group`, `function ieee80211_calc_legacy_rate_duration`, `function ieee80211_get_rate_duration`, `function ieee80211_calc_rx_airtime`, `function ieee80211_fill_rate_info`, `function ieee80211_fill_rx_status`, `function ieee80211_calc_tx_airtime_rate`, `function ieee80211_calc_tx_airtime`, `function ieee80211_calc_expected_tx_airtime`, `export ieee80211_calc_rx_airtime`.
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.