net/mac80211/rc80211_minstrel_ht_debugfs.c

Source file repositories/reference/linux-study-clean/net/mac80211/rc80211_minstrel_ht_debugfs.c

File Facts

System
Linux kernel
Corpus path
net/mac80211/rc80211_minstrel_ht_debugfs.c
Extension
.c
Size
9185 bytes
Lines
335
Domain
Networking Core
Bucket
Sockets, Protocols, Packet Path, And Network Policy
Inferred role
Networking Core: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations minstrel_ht_stat_fops = {
	.owner = THIS_MODULE,
	.open = minstrel_ht_stats_open,
	.read = minstrel_stats_read,
	.release = minstrel_stats_release,
};

static char *
minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
{
	const struct mcs_group *mg;
	unsigned int j, tp_max, tp_avg, eprob, tx_time;
	char htmode = '2';
	char gimode = 'L';
	u32 gflags;

	if (!mi->supported[i])
		return p;

	mg = &minstrel_mcs_groups[i];
	gflags = mg->flags;

	if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
		htmode = '4';
	else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
		htmode = '8';
	if (gflags & IEEE80211_TX_RC_SHORT_GI)
		gimode = 'S';

	for (j = 0; j < MCS_GROUP_RATES; j++) {
		struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
		int idx = MI_RATE(i, j);
		unsigned int duration;

		if (!(mi->supported[i] & BIT(j)))
			continue;

		if (gflags & IEEE80211_TX_RC_MCS) {
			p += sprintf(p, "HT%c0,", htmode);
			p += sprintf(p, "%cGI,", gimode);
			p += sprintf(p, "%d,", mg->streams);
		} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
			p += sprintf(p, "VHT%c0,", htmode);
			p += sprintf(p, "%cGI,", gimode);
			p += sprintf(p, "%d,", mg->streams);
		} else if (i == MINSTREL_OFDM_GROUP) {
			p += sprintf(p, "OFDM,,1,");
		} else {
			p += sprintf(p, "CCK,");
			p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
			p += sprintf(p, "1,");
		}

		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
		p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
		p += sprintf(p, "%s", (minstrel_ht_is_sample_rate(mi, idx) ? "S" : ""));

		if (gflags & IEEE80211_TX_RC_MCS) {
			p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
		} else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
			p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
		} else {
			int r;

			if (i == MINSTREL_OFDM_GROUP)
				r = minstrel_ofdm_bitrates[j % 8];
			else
				r = minstrel_cck_bitrates[j % 4];

			p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
		}

		p += sprintf(p, "%u,", idx);

		duration = mg->duration[j];
		duration <<= mg->shift;
		tx_time = DIV_ROUND_CLOSEST(duration, 1000);
		p += sprintf(p, "%u,", tx_time);

		tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
		tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
		eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);

		p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
				"%u,%llu,%llu,",
				tp_max / 10, tp_max % 10,
				tp_avg / 10, tp_avg % 10,

Annotation

Implementation Notes