[deliverable/linux.git] / net / mac80211 / debugfs_sta.c

/*
 * Copyright 2003-2005	Devicescape Software, Inc.
 * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/debugfs.h>
#include <linux/ieee80211.h>
#include "ieee80211_i.h"
#include "debugfs.h"
#include "debugfs_sta.h"
#include "sta_info.h"
#include "driver-ops.h"

/* sta attributtes */

#define STA_READ(name, field, format_string)				\
static ssize_t sta_ ##name## _read(struct file *file,			\
				   char __user *userbuf,		\
				   size_t count, loff_t *ppos)		\
{									\
	struct sta_info *sta = file->private_data;			\
	return mac80211_format_buffer(userbuf, count, ppos, 		\
				      format_string, sta->field);	\
}
#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
#define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
#define STA_READ_S(name, field) STA_READ(name, field, "%s\n")

#define STA_OPS(name)							\
static const struct file_operations sta_ ##name## _ops = {		\
	.read = sta_##name##_read,					\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
}

#define STA_OPS_W(name)							\
static const struct file_operations sta_ ##name## _ops = {		\
	.write = sta_##name##_write,					\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
}

#define STA_OPS_RW(name)						\
static const struct file_operations sta_ ##name## _ops = {		\
	.read = sta_##name##_read,					\
	.write = sta_##name##_write,					\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
}

#define STA_FILE(name, field, format)					\
		STA_READ_##format(name, field)				\
		STA_OPS(name)

STA_FILE(aid, sta.aid, D);
STA_FILE(dev, sdata->name, S);
STA_FILE(last_signal, last_signal, D);
STA_FILE(last_ack_signal, last_ack_signal, D);
STA_FILE(beacon_loss_count, beacon_loss_count, D);

static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
			      size_t count, loff_t *ppos)
{
	char buf[121];
	struct sta_info *sta = file->private_data;

#define TEST(flg) \
	test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""

	int res = scnprintf(buf, sizeof(buf),
			    "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
			    TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
			    TEST(PS_DRIVER), TEST(AUTHORIZED),
			    TEST(SHORT_PREAMBLE),
			    sta->sta.wme ? "WME\n" : "",
			    TEST(WDS), TEST(CLEAR_PS_FILT),
			    TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
			    TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
			    TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
			    TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
			    TEST(4ADDR_EVENT), TEST(INSERTED),
			    TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
			    TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
#undef TEST
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(flags);

static ssize_t sta_num_ps_buf_frames_read(struct file *file,
					  char __user *userbuf,
					  size_t count, loff_t *ppos)
{
	struct sta_info *sta = file->private_data;
	char buf[17*IEEE80211_NUM_ACS], *p = buf;
	int ac;

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
		p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
			       skb_queue_len(&sta->ps_tx_buf[ac]) +
			       skb_queue_len(&sta->tx_filtered[ac]));
	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(num_ps_buf_frames);

static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
				    size_t count, loff_t *ppos)
{
	struct sta_info *sta = file->private_data;
	return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
				      jiffies_to_msecs(jiffies - sta->last_rx));
}
STA_OPS(inactive_ms);


static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
					size_t count, loff_t *ppos)
{
	struct sta_info *sta = file->private_data;
	struct timespec uptime;
	struct tm result;
	long connected_time_secs;
	char buf[100];
	int res;
	ktime_get_ts(&uptime);
	connected_time_secs = uptime.tv_sec - sta->last_connected;
	time_to_tm(connected_time_secs, 0, &result);
	result.tm_year -= 70;
	result.tm_mday -= 1;
	res = scnprintf(buf, sizeof(buf),
		"years  - %ld\nmonths - %d\ndays   - %d\nclock  - %d:%d:%d\n\n",
			result.tm_year, result.tm_mon, result.tm_mday,
			result.tm_hour, result.tm_min, result.tm_sec);
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(connected_time);


static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
				      size_t count, loff_t *ppos)
{
	char buf[15*IEEE80211_NUM_TIDS], *p = buf;
	int i;
	struct sta_info *sta = file->private_data;
	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
		p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
			       le16_to_cpu(sta->last_seq_ctrl[i]));
	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(last_seq_ctrl);

static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
					size_t count, loff_t *ppos)
{
	char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
	int i;
	struct sta_info *sta = file->private_data;
	struct tid_ampdu_rx *tid_rx;
	struct tid_ampdu_tx *tid_tx;

	rcu_read_lock();

	p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
			sta->ampdu_mlme.dialog_token_allocator + 1);
	p += scnprintf(p, sizeof(buf) + buf - p,
		       "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");

	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
		tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
		tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);

		p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
		p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
		p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
				tid_rx ? tid_rx->dialog_token : 0);
		p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
				tid_rx ? tid_rx->ssn : 0);

		p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
		p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
				tid_tx ? tid_tx->dialog_token : 0);
		p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
				tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
		p += scnprintf(p, sizeof(buf) + buf - p, "\n");
	}
	rcu_read_unlock();

	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}

static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
				    size_t count, loff_t *ppos)
{
	char _buf[12] = {}, *buf = _buf;
	struct sta_info *sta = file->private_data;
	bool start, tx;
	unsigned long tid;
	int ret;

	if (count > sizeof(_buf))
		return -EINVAL;

	if (copy_from_user(buf, userbuf, count))
		return -EFAULT;

	buf[sizeof(_buf) - 1] = '\0';

	if (strncmp(buf, "tx ", 3) == 0) {
		buf += 3;
		tx = true;
	} else if (strncmp(buf, "rx ", 3) == 0) {
		buf += 3;
		tx = false;
	} else
		return -EINVAL;

	if (strncmp(buf, "start ", 6) == 0) {
		buf += 6;
		start = true;
		if (!tx)
			return -EINVAL;
	} else if (strncmp(buf, "stop ", 5) == 0) {
		buf += 5;
		start = false;
	} else
		return -EINVAL;

	ret = kstrtoul(buf, 0, &tid);
	if (ret)
		return ret;

	if (tid >= IEEE80211_NUM_TIDS)
		return -EINVAL;

	if (tx) {
		if (start)
			ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
		else
			ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
	} else {
		__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
					       3, true);
		ret = 0;
	}

	return ret ?: count;
}
STA_OPS_RW(agg_status);

static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
#define PRINT_HT_CAP(_cond, _str) \
	do { \
	if (_cond) \
			p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
	} while (0)
	char buf[512], *p = buf;
	int i;
	struct sta_info *sta = file->private_data;
	struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;

	p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
			htc->ht_supported ? "" : "not ");
	if (htc->ht_supported) {
		p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);

		PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
		PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
		PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");

		PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
		PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
		PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");

		PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
		PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
		PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
		PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");

		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
		PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");

		PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");

		PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
			     "3839 bytes");
		PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
			     "7935 bytes");

		/*
		 * For beacons and probe response this would mean the BSS
		 * does or does not allow the usage of DSSS/CCK HT40.
		 * Otherwise it means the STA does or does not use
		 * DSSS/CCK HT40.
		 */
		PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
		PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");

		/* BIT(13) is reserved */

		PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");

		PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");

		p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
				htc->ampdu_factor, htc->ampdu_density);
		p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");

		for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
			p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
					htc->mcs.rx_mask[i]);
		p += scnprintf(p, sizeof(buf)+buf-p, "\n");

		/* If not set this is meaningless */
		if (le16_to_cpu(htc->mcs.rx_highest)) {
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "MCS rx highest: %d Mbps\n",
				       le16_to_cpu(htc->mcs.rx_highest));
		}

		p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
				htc->mcs.tx_params);
	}

	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(ht_capa);

static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	char buf[128], *p = buf;
	struct sta_info *sta = file->private_data;
	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;

	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
			vhtc->vht_supported ? "" : "not ");
	if (vhtc->vht_supported) {
		p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);

		p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
			       le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
		if (vhtc->vht_mcs.rx_highest)
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "MCS RX highest: %d Mbps\n",
				       le16_to_cpu(vhtc->vht_mcs.rx_highest));
		p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
			       le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
		if (vhtc->vht_mcs.tx_highest)
			p += scnprintf(p, sizeof(buf)+buf-p,
				       "MCS TX highest: %d Mbps\n",
				       le16_to_cpu(vhtc->vht_mcs.tx_highest));
	}

	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(vht_capa);

static ssize_t sta_current_tx_rate_read(struct file *file, char __user *userbuf,
					size_t count, loff_t *ppos)
{
	struct sta_info *sta = file->private_data;
	struct rate_info rinfo;
	u16 rate;
	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
	rate = cfg80211_calculate_bitrate(&rinfo);

	return mac80211_format_buffer(userbuf, count, ppos,
				      "%d.%d MBit/s\n",
				      rate/10, rate%10);
}
STA_OPS(current_tx_rate);

static ssize_t sta_last_rx_rate_read(struct file *file, char __user *userbuf,
				     size_t count, loff_t *ppos)
{
	struct sta_info *sta = file->private_data;
	struct rate_info rinfo;
	u16 rate;

	sta_set_rate_info_rx(sta, &rinfo);

	rate = cfg80211_calculate_bitrate(&rinfo);

	return mac80211_format_buffer(userbuf, count, ppos,
				      "%d.%d MBit/s\n",
				      rate/10, rate%10);
}
STA_OPS(last_rx_rate);

static int
sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
			   char *buf, int pos, int bufsz)
{
	int i;
	int range_count = tx_latency->n_ranges;
	u32 *bin_ranges = tx_latency->ranges;

	pos += scnprintf(buf + pos, bufsz - pos,
			  "Station\t\t\tTID\tMax\tAvg");
	if (range_count) {
		pos += scnprintf(buf + pos, bufsz - pos,
				  "\t<=%d", bin_ranges[0]);
		for (i = 0; i < range_count - 1; i++)
			pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
					  bin_ranges[i], bin_ranges[i+1]);
		pos += scnprintf(buf + pos, bufsz - pos,
				  "\t%d<", bin_ranges[range_count - 1]);
	}

	pos += scnprintf(buf + pos, bufsz - pos, "\n");

	return pos;
}

static int
sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
			  struct ieee80211_tx_latency_stat *tx_lat,
			  char *buf, int pos, int bufsz, int tid)
{
	u32 avg = 0;
	int j;
	int bin_count = tx_lat->bin_count;

	pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
	/* make sure you don't divide in 0 */
	if (tx_lat->counter)
		avg = tx_lat->sum / tx_lat->counter;

	pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
			  tx_lat->max, avg);

	if (tx_lat_range->n_ranges && tx_lat->bins)
		for (j = 0; j < bin_count; j++)
			pos += scnprintf(buf + pos, bufsz - pos,
					  "\t%d", tx_lat->bins[j]);
	pos += scnprintf(buf + pos, bufsz - pos, "\n");

	return pos;
}

/*
 * Output Tx latency statistics station && restart all statistics information
 */
static ssize_t sta_tx_latency_stat_read(struct file *file,
					char __user *userbuf,
					size_t count, loff_t *ppos)
{
	struct sta_info *sta = file->private_data;
	struct ieee80211_local *local = sta->local;
	struct ieee80211_tx_latency_bin_ranges *tx_latency;
	char *buf;
	int bufsz, ret, i;
	int pos = 0;

	bufsz = 20 * IEEE80211_NUM_TIDS *
		sizeof(struct ieee80211_tx_latency_stat);
	buf = kzalloc(bufsz, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	rcu_read_lock();

	tx_latency = rcu_dereference(local->tx_latency);

	if (!sta->tx_lat) {
		pos += scnprintf(buf + pos, bufsz - pos,
				 "Tx latency statistics are not enabled\n");
		goto unlock;
	}

	pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);

	pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
		pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
						buf, pos, bufsz, i);
unlock:
	rcu_read_unlock();

	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	kfree(buf);

	return ret;
}
STA_OPS(tx_latency_stat);

static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
					       const char __user *userbuf,
					       size_t count, loff_t *ppos)
{
	u32 *bins;
	int bin_count;
	struct sta_info *sta = file->private_data;
	int i;

	if (!sta->tx_lat)
		return -EINVAL;

	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
		bins = sta->tx_lat[i].bins;
		bin_count = sta->tx_lat[i].bin_count;

		sta->tx_lat[i].max = 0;
		sta->tx_lat[i].sum = 0;
		sta->tx_lat[i].counter = 0;

		if (bin_count)
			memset(bins, 0, bin_count * sizeof(u32));
	}

	return count;
}
STA_OPS_W(tx_latency_stat_reset);

#define DEBUGFS_ADD(name) \
	debugfs_create_file(#name, 0400, \
		sta->debugfs.dir, sta, &sta_ ##name## _ops);

#define DEBUGFS_ADD_COUNTER(name, field)				\
	if (sizeof(sta->field) == sizeof(u32))				\
		debugfs_create_u32(#name, 0400, sta->debugfs.dir,	\
			(u32 *) &sta->field);				\
	else								\
		debugfs_create_u64(#name, 0400, sta->debugfs.dir,	\
			(u64 *) &sta->field);

void ieee80211_sta_debugfs_add(struct sta_info *sta)
{
	struct ieee80211_local *local = sta->local;
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
	u8 mac[3*ETH_ALEN];

	sta->debugfs.add_has_run = true;

	if (!stations_dir)
		return;

	snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);

	/*
	 * This might fail due to a race condition:
	 * When mac80211 unlinks a station, the debugfs entries
	 * remain, but it is already possible to link a new
	 * station with the same address which triggers adding
	 * it to debugfs; therefore, if the old station isn't
	 * destroyed quickly enough the old station's debugfs
	 * dir might still be around.
	 */
	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
	if (!sta->debugfs.dir)
		return;

	DEBUGFS_ADD(flags);
	DEBUGFS_ADD(num_ps_buf_frames);
	DEBUGFS_ADD(inactive_ms);
	DEBUGFS_ADD(connected_time);
	DEBUGFS_ADD(last_seq_ctrl);
	DEBUGFS_ADD(agg_status);
	DEBUGFS_ADD(dev);
	DEBUGFS_ADD(last_signal);
	DEBUGFS_ADD(beacon_loss_count);
	DEBUGFS_ADD(ht_capa);
	DEBUGFS_ADD(vht_capa);
	DEBUGFS_ADD(last_ack_signal);
	DEBUGFS_ADD(current_tx_rate);
	DEBUGFS_ADD(last_rx_rate);
	DEBUGFS_ADD(tx_latency_stat);
	DEBUGFS_ADD(tx_latency_stat_reset);

	DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
	DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
	DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
	DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
	DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
	DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
	DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
	DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
	DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
	DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);

	if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
		debugfs_create_x32("driver_buffered_tids", 0400,
				   sta->debugfs.dir,
				   (u32 *)&sta->driver_buffered_tids);
	else
		debugfs_create_x64("driver_buffered_tids", 0400,
				   sta->debugfs.dir,
				   (u64 *)&sta->driver_buffered_tids);

	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
}

void ieee80211_sta_debugfs_remove(struct sta_info *sta)
{
	struct ieee80211_local *local = sta->local;
	struct ieee80211_sub_if_data *sdata = sta->sdata;

	drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
	debugfs_remove_recursive(sta->debugfs.dir);
	sta->debugfs.dir = NULL;
}
Commit	Line	Data
e9f207f0 JB	1	/*
	2	* Copyright 2003-2005 Devicescape Software, Inc.
	3	* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
	4	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e	5	* Copyright 2013-2014 Intel Mobile Communications GmbH
e9f207f0 JB	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/debugfs.h>
	13	#include <linux/ieee80211.h>
	14	#include "ieee80211_i.h"
	15	#include "debugfs.h"
	16	#include "debugfs_sta.h"
	17	#include "sta_info.h"
77d2ece6	18	#include "driver-ops.h"
e9f207f0 JB	19
	20	/* sta attributtes */
	21
07caf9d6	22	#define STA_READ(name, field, format_string) \
e9f207f0 JB	23	static ssize_t sta_ ##name## _read(struct file *file, \
	24	char __user *userbuf, \
	25	size_t count, loff_t *ppos) \
	26	{ \
e9f207f0	27	struct sta_info *sta = file->private_data; \
07caf9d6 EP	28	return mac80211_format_buffer(userbuf, count, ppos, \
07caf9d6 EP	29	format_string, sta->field); \
e9f207f0	30	}
07caf9d6 EP	31	#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
	32	#define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
	33	#define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
e9f207f0	34
e9f207f0 JB	35	#define STA_OPS(name) \
	36	static const struct file_operations sta_ ##name## _ops = { \
	37	.read = sta_##name##_read, \
234e3405	38	.open = simple_open, \
2b18ab36	39	.llseek = generic_file_llseek, \
e9f207f0 JB	40	}
e9f207f0 JB	41
ad38bfc9 MG	42	#define STA_OPS_W(name) \
	43	static const struct file_operations sta_ ##name## _ops = { \
	44	.write = sta_##name##_write, \
	45	.open = simple_open, \
	46	.llseek = generic_file_llseek, \
	47	}
	48
a75b4363 JB	49	#define STA_OPS_RW(name) \
	50	static const struct file_operations sta_ ##name## _ops = { \
	51	.read = sta_##name##_read, \
	52	.write = sta_##name##_write, \
234e3405	53	.open = simple_open, \
2b18ab36	54	.llseek = generic_file_llseek, \
a75b4363 JB	55	}
a75b4363 JB	56
e9f207f0 JB	57	#define STA_FILE(name, field, format) \
	58	STA_READ_##format(name, field) \
	59	STA_OPS(name)
	60
17741cdc	61	STA_FILE(aid, sta.aid, D);
47846c9b	62	STA_FILE(dev, sdata->name, S);
e9f207f0	63	STA_FILE(last_signal, last_signal, D);
db94357d	64	STA_FILE(last_ack_signal, last_ack_signal, D);
78e443e4	65	STA_FILE(beacon_loss_count, beacon_loss_count, D);
e9f207f0 JB	66
	67	static ssize_t sta_flags_read(struct file file, char __user userbuf,
	68	size_t count, loff_t *ppos)
	69	{
5bade101	70	char buf[121];
e9f207f0	71	struct sta_info *sta = file->private_data;
c2c98fde	72
5bade101 JB	73	#define TEST(flg) \
	74	test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
	75
	76	int res = scnprintf(buf, sizeof(buf),
a7a6bdd0	77	"%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
5bade101 JB	78	TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
5bade101 JB	79	TEST(PS_DRIVER), TEST(AUTHORIZED),
fb4431bf	80	TEST(SHORT_PREAMBLE),
a74a8c84 JB	81	sta->sta.wme ? "WME\n" : "",
a74a8c84 JB	82	TEST(WDS), TEST(CLEAR_PS_FILT),
5bade101 JB	83	TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
5bade101 JB	84	TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
9041c1fa	85	TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
a7a6bdd0 AN	86	TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
	87	TEST(4ADDR_EVENT), TEST(INSERTED),
	88	TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
	89	TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
5bade101	90	#undef TEST
e9f207f0 JB	91	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	92	}
	93	STA_OPS(flags);
	94
	95	static ssize_t sta_num_ps_buf_frames_read(struct file *file,
	96	char __user *userbuf,
	97	size_t count, loff_t *ppos)
	98	{
e9f207f0	99	struct sta_info *sta = file->private_data;
948d887d JB	100	char buf[17IEEE80211_NUM_ACS], p = buf;
	101	int ac;
	102
	103	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
	104	p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
	105	skb_queue_len(&sta->ps_tx_buf[ac]) +
	106	skb_queue_len(&sta->tx_filtered[ac]));
	107	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
e9f207f0 JB	108	}
	109	STA_OPS(num_ps_buf_frames);
	110
e9f207f0 JB	111	static ssize_t sta_inactive_ms_read(struct file file, char __user userbuf,
	112	size_t count, loff_t *ppos)
	113	{
e9f207f0	114	struct sta_info *sta = file->private_data;
07caf9d6 EP	115	return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
07caf9d6 EP	116	jiffies_to_msecs(jiffies - sta->last_rx));
e9f207f0 JB	117	}
	118	STA_OPS(inactive_ms);
	119
ebe27c91 MSS	120
	121	static ssize_t sta_connected_time_read(struct file file, char __user userbuf,
	122	size_t count, loff_t *ppos)
	123	{
	124	struct sta_info *sta = file->private_data;
	125	struct timespec uptime;
	126	struct tm result;
	127	long connected_time_secs;
	128	char buf[100];
	129	int res;
18171520	130	ktime_get_ts(&uptime);
ebe27c91 MSS	131	connected_time_secs = uptime.tv_sec - sta->last_connected;
	132	time_to_tm(connected_time_secs, 0, &result);
	133	result.tm_year -= 70;
	134	result.tm_mday -= 1;
	135	res = scnprintf(buf, sizeof(buf),
7762bb02	136	"years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
ebe27c91 MSS	137	result.tm_year, result.tm_mon, result.tm_mday,
	138	result.tm_hour, result.tm_min, result.tm_sec);
	139	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	140	}
	141	STA_OPS(connected_time);
	142
	143
	144
e9f207f0 JB	145	static ssize_t sta_last_seq_ctrl_read(struct file file, char __user userbuf,
	146	size_t count, loff_t *ppos)
	147	{
5a306f58	148	char buf[15IEEE80211_NUM_TIDS], p = buf;
e9f207f0 JB	149	int i;
e9f207f0 JB	150	struct sta_info *sta = file->private_data;
5a306f58	151	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
e9f207f0	152	p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
ba9b07d0	153	le16_to_cpu(sta->last_seq_ctrl[i]));
e9f207f0 JB	154	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	155	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	156	}
	157	STA_OPS(last_seq_ctrl);
	158
eb2ba62e RR	159	static ssize_t sta_agg_status_read(struct file file, char __user userbuf,
	160	size_t count, loff_t *ppos)
	161	{
5a306f58	162	char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
eb2ba62e RR	163	int i;
eb2ba62e RR	164	struct sta_info *sta = file->private_data;
dd318575 JB	165	struct tid_ampdu_rx *tid_rx;
	166	struct tid_ampdu_tx *tid_tx;
	167
	168	rcu_read_lock();
eb2ba62e	169
e0b20f1c	170	p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
386aa23d	171	sta->ampdu_mlme.dialog_token_allocator + 1);
e0b20f1c	172	p += scnprintf(p, sizeof(buf) + buf - p,
14b058bb	173	"TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
dd318575	174
5a306f58	175	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
dd318575 JB	176	tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
	177	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
	178
e0b20f1c	179	p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
dd318575	180	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
e0b20f1c	181	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	182	tid_rx ? tid_rx->dialog_token : 0);
e0b20f1c	183	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
dd318575	184	tid_rx ? tid_rx->ssn : 0);
386aa23d	185
dd318575	186	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
e0b20f1c	187	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	188	tid_tx ? tid_tx->dialog_token : 0);
e0b20f1c	189	p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
dd318575	190	tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
e0b20f1c	191	p += scnprintf(p, sizeof(buf) + buf - p, "\n");
386aa23d	192	}
dd318575	193	rcu_read_unlock();
eb2ba62e RR	194
	195	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	196	}
a75b4363 JB	197
	198	static ssize_t sta_agg_status_write(struct file file, const char __user userbuf,
	199	size_t count, loff_t *ppos)
	200	{
c4d2ffac	201	char _buf[12] = {}, *buf = _buf;
a75b4363 JB	202	struct sta_info *sta = file->private_data;
	203	bool start, tx;
	204	unsigned long tid;
	205	int ret;
	206
	207	if (count > sizeof(_buf))
	208	return -EINVAL;
	209
	210	if (copy_from_user(buf, userbuf, count))
	211	return -EFAULT;
	212
	213	buf[sizeof(_buf) - 1] = '\0';
	214
	215	if (strncmp(buf, "tx ", 3) == 0) {
	216	buf += 3;
	217	tx = true;
	218	} else if (strncmp(buf, "rx ", 3) == 0) {
	219	buf += 3;
	220	tx = false;
	221	} else
	222	return -EINVAL;
	223
	224	if (strncmp(buf, "start ", 6) == 0) {
	225	buf += 6;
	226	start = true;
	227	if (!tx)
	228	return -EINVAL;
	229	} else if (strncmp(buf, "stop ", 5) == 0) {
	230	buf += 5;
	231	start = false;
	232	} else
	233	return -EINVAL;
	234
4b5511eb AP	235	ret = kstrtoul(buf, 0, &tid);
	236	if (ret)
	237	return ret;
a75b4363	238
5a306f58	239	if (tid >= IEEE80211_NUM_TIDS)
a75b4363 JB	240	return -EINVAL;
	241
	242	if (tx) {
	243	if (start)
bd2ce6e4	244	ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
a75b4363	245	else
6a8579d0	246	ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
a75b4363	247	} else {
53f73c09 JB	248	__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
53f73c09 JB	249	3, true);
a75b4363 JB	250	ret = 0;
	251	}
	252
	253	return ret ?: count;
	254	}
	255	STA_OPS_RW(agg_status);
eb2ba62e	256
64491f0e JB	257	static ssize_t sta_ht_capa_read(struct file file, char __user userbuf,
	258	size_t count, loff_t *ppos)
	259	{
7db94e21 LR	260	#define PRINT_HT_CAP(_cond, _str) \
	261	do { \
	262	if (_cond) \
	263	p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
	264	} while (0)
4c82bf8e	265	char buf[512], *p = buf;
64491f0e JB	266	int i;
	267	struct sta_info *sta = file->private_data;
	268	struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
	269
	270	p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
	271	htc->ht_supported ? "" : "not ");
	272	if (htc->ht_supported) {
cb136f54	273	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
7db94e21	274
c15cf5fc	275	PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
7db94e21 LR	276	PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
	277	PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
	278
	279	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
	280	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
	281	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
	282
	283	PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
	284	PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
	285	PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
	286	PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
	287
	288	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
	289	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
	290	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
	291	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
	292
	293	PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
	294
7db94e21	295	PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
904603f9 BG	296	"3839 bytes");
904603f9 BG	297	PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
7db94e21 LR	298	"7935 bytes");
	299
	300	/*
	301	* For beacons and probe response this would mean the BSS
	302	* does or does not allow the usage of DSSS/CCK HT40.
	303	* Otherwise it means the STA does or does not use
	304	* DSSS/CCK HT40.
	305	*/
	306	PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
	307	PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
	308
	309	/* BIT(13) is reserved */
	310
	311	PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
	312
	313	PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
	314
64491f0e JB	315	p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
	316	htc->ampdu_factor, htc->ampdu_density);
	317	p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
9da3e068	318
64491f0e JB	319	for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
	320	p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
	321	htc->mcs.rx_mask[i]);
9da3e068 LR	322	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	323
	324	/* If not set this is meaningless */
	325	if (le16_to_cpu(htc->mcs.rx_highest)) {
	326	p += scnprintf(p, sizeof(buf)+buf-p,
	327	"MCS rx highest: %d Mbps\n",
	328	le16_to_cpu(htc->mcs.rx_highest));
	329	}
	330
64491f0e JB	331	p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
	332	htc->mcs.tx_params);
	333	}
	334
	335	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	336	}
	337	STA_OPS(ht_capa);
	338
90fcba65 JB	339	static ssize_t sta_vht_capa_read(struct file file, char __user userbuf,
	340	size_t count, loff_t *ppos)
	341	{
	342	char buf[128], *p = buf;
	343	struct sta_info *sta = file->private_data;
	344	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
	345
	346	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
	347	vhtc->vht_supported ? "" : "not ");
	348	if (vhtc->vht_supported) {
	349	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
	350
	351	p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
	352	le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
	353	if (vhtc->vht_mcs.rx_highest)
	354	p += scnprintf(p, sizeof(buf)+buf-p,
	355	"MCS RX highest: %d Mbps\n",
	356	le16_to_cpu(vhtc->vht_mcs.rx_highest));
	357	p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
	358	le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
	359	if (vhtc->vht_mcs.tx_highest)
	360	p += scnprintf(p, sizeof(buf)+buf-p,
	361	"MCS TX highest: %d Mbps\n",
	362	le16_to_cpu(vhtc->vht_mcs.tx_highest));
	363	}
	364
	365	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	366	}
	367	STA_OPS(vht_capa);
	368
91b8c050 S	369	static ssize_t sta_current_tx_rate_read(struct file file, char __user userbuf,
	370	size_t count, loff_t *ppos)
	371	{
	372	struct sta_info *sta = file->private_data;
	373	struct rate_info rinfo;
	374	u16 rate;
	375	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
	376	rate = cfg80211_calculate_bitrate(&rinfo);
	377
	378	return mac80211_format_buffer(userbuf, count, ppos,
	379	"%d.%d MBit/s\n",
	380	rate/10, rate%10);
	381	}
	382	STA_OPS(current_tx_rate);
	383
1f2e651c S	384	static ssize_t sta_last_rx_rate_read(struct file file, char __user userbuf,
	385	size_t count, loff_t *ppos)
	386	{
	387	struct sta_info *sta = file->private_data;
	388	struct rate_info rinfo;
	389	u16 rate;
	390
	391	sta_set_rate_info_rx(sta, &rinfo);
	392
	393	rate = cfg80211_calculate_bitrate(&rinfo);
	394
	395	return mac80211_format_buffer(userbuf, count, ppos,
	396	"%d.%d MBit/s\n",
	397	rate/10, rate%10);
	398	}
	399	STA_OPS(last_rx_rate);
	400
ad38bfc9 MG	401	static int
	402	sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
	403	char *buf, int pos, int bufsz)
	404	{
	405	int i;
	406	int range_count = tx_latency->n_ranges;
	407	u32 *bin_ranges = tx_latency->ranges;
	408
	409	pos += scnprintf(buf + pos, bufsz - pos,
	410	"Station\t\t\tTID\tMax\tAvg");
	411	if (range_count) {
	412	pos += scnprintf(buf + pos, bufsz - pos,
	413	"\t<=%d", bin_ranges[0]);
	414	for (i = 0; i < range_count - 1; i++)
	415	pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
	416	bin_ranges[i], bin_ranges[i+1]);
	417	pos += scnprintf(buf + pos, bufsz - pos,
	418	"\t%d<", bin_ranges[range_count - 1]);
	419	}
	420
	421	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	422
	423	return pos;
	424	}
	425
	426	static int
	427	sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
	428	struct ieee80211_tx_latency_stat *tx_lat,
	429	char *buf, int pos, int bufsz, int tid)
	430	{
	431	u32 avg = 0;
	432	int j;
	433	int bin_count = tx_lat->bin_count;
	434
	435	pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
	436	/* make sure you don't divide in 0 */
	437	if (tx_lat->counter)
	438	avg = tx_lat->sum / tx_lat->counter;
	439
	440	pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
	441	tx_lat->max, avg);
	442
	443	if (tx_lat_range->n_ranges && tx_lat->bins)
	444	for (j = 0; j < bin_count; j++)
	445	pos += scnprintf(buf + pos, bufsz - pos,
	446	"\t%d", tx_lat->bins[j]);
	447	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	448
	449	return pos;
	450	}
	451
	452	/*
	453	* Output Tx latency statistics station && restart all statistics information
	454	*/
	455	static ssize_t sta_tx_latency_stat_read(struct file *file,
	456	char __user *userbuf,
	457	size_t count, loff_t *ppos)
	458	{
	459	struct sta_info *sta = file->private_data;
	460	struct ieee80211_local *local = sta->local;
	461	struct ieee80211_tx_latency_bin_ranges *tx_latency;
	462	char *buf;
	463	int bufsz, ret, i;
	464	int pos = 0;
465
466	bufsz = 20 * IEEE80211_NUM_TIDS *
467	sizeof(struct ieee80211_tx_latency_stat);
468	buf = kzalloc(bufsz, GFP_KERNEL);
469	if (!buf)
470	return -ENOMEM;
471
472	rcu_read_lock();
473
474	tx_latency = rcu_dereference(local->tx_latency);
475
476	if (!sta->tx_lat) {
477	pos += scnprintf(buf + pos, bufsz - pos,
478	"Tx latency statistics are not enabled\n");
479	goto unlock;
480	}
481
482	pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);
483
484	pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
485	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
486	pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
487	buf, pos, bufsz, i);
488	unlock:
489	rcu_read_unlock();
490
491	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
492	kfree(buf);
493
494	return ret;
495	}
496	STA_OPS(tx_latency_stat);
497
498	static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
499	const char __user *userbuf,
500	size_t count, loff_t *ppos)
501	{
502	u32 *bins;
503	int bin_count;
504	struct sta_info *sta = file->private_data;
505	int i;
506
507	if (!sta->tx_lat)
508	return -EINVAL;
509
510	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
511	bins = sta->tx_lat[i].bins;
512	bin_count = sta->tx_lat[i].bin_count;
513
514	sta->tx_lat[i].max = 0;
515	sta->tx_lat[i].sum = 0;
516	sta->tx_lat[i].counter = 0;
517
518	if (bin_count)
519	memset(bins, 0, bin_count * sizeof(u32));
520	}
521
522	return count;
523	}
524	STA_OPS_W(tx_latency_stat_reset);
525
e9f207f0	526	#define DEBUGFS_ADD(name) \
7bcfaf2f	527	debugfs_create_file(#name, 0400, \
e9f207f0 JB	528	sta->debugfs.dir, sta, &sta_ ##name## _ops);
e9f207f0 JB	529
2826bcd8 FF	530	#define DEBUGFS_ADD_COUNTER(name, field) \
	531	if (sizeof(sta->field) == sizeof(u32)) \
	532	debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
	533	(u32 *) &sta->field); \
	534	else \
	535	debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
	536	(u64 *) &sta->field);
e9f207f0 JB	537
	538	void ieee80211_sta_debugfs_add(struct sta_info *sta)
	539	{
77d2ece6 SM	540	struct ieee80211_local *local = sta->local;
77d2ece6 SM	541	struct ieee80211_sub_if_data *sdata = sta->sdata;
295bafb4	542	struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
0c68ae26	543	u8 mac[3*ETH_ALEN];
e9f207f0	544
63044e9f JB	545	sta->debugfs.add_has_run = true;
63044e9f JB	546
e9f207f0 JB	547	if (!stations_dir)
	548	return;
	549
0c68ae26	550	snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
e9f207f0	551
63044e9f JB	552	/*
	553	* This might fail due to a race condition:
	554	* When mac80211 unlinks a station, the debugfs entries
	555	* remain, but it is already possible to link a new
	556	* station with the same address which triggers adding
	557	* it to debugfs; therefore, if the old station isn't
	558	* destroyed quickly enough the old station's debugfs
	559	* dir might still be around.
	560	*/
0795af57	561	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
e9f207f0 JB	562	if (!sta->debugfs.dir)
	563	return;
	564
	565	DEBUGFS_ADD(flags);
	566	DEBUGFS_ADD(num_ps_buf_frames);
e9f207f0	567	DEBUGFS_ADD(inactive_ms);
ebe27c91	568	DEBUGFS_ADD(connected_time);
e9f207f0	569	DEBUGFS_ADD(last_seq_ctrl);
eb2ba62e	570	DEBUGFS_ADD(agg_status);
386aa23d	571	DEBUGFS_ADD(dev);
386aa23d	572	DEBUGFS_ADD(last_signal);
78e443e4	573	DEBUGFS_ADD(beacon_loss_count);
64491f0e	574	DEBUGFS_ADD(ht_capa);
90fcba65	575	DEBUGFS_ADD(vht_capa);
db94357d	576	DEBUGFS_ADD(last_ack_signal);
91b8c050	577	DEBUGFS_ADD(current_tx_rate);
1f2e651c	578	DEBUGFS_ADD(last_rx_rate);
ad38bfc9 MG	579	DEBUGFS_ADD(tx_latency_stat);
ad38bfc9 MG	580	DEBUGFS_ADD(tx_latency_stat_reset);
2826bcd8 FF	581
	582	DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
	583	DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
	584	DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
	585	DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
	586	DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
	587	DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
	588	DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
	589	DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
	590	DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
	591	DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
	592	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
77d2ece6	593
7cf1f14e JB	594	if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
	595	debugfs_create_x32("driver_buffered_tids", 0400,
	596	sta->debugfs.dir,
	597	(u32 *)&sta->driver_buffered_tids);
	598	else
	599	debugfs_create_x64("driver_buffered_tids", 0400,
	600	sta->debugfs.dir,
	601	(u64 *)&sta->driver_buffered_tids);
	602
77d2ece6	603	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
e9f207f0 JB	604	}
	605
	606	void ieee80211_sta_debugfs_remove(struct sta_info *sta)
	607	{
77d2ece6 SM	608	struct ieee80211_local *local = sta->local;
	609	struct ieee80211_sub_if_data *sdata = sta->sdata;
	610
	611	drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
7bcfaf2f	612	debugfs_remove_recursive(sta->debugfs.dir);
e9f207f0 JB	613	sta->debugfs.dir = NULL;
e9f207f0 JB	614	}