[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",
			    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(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),
3f52b7e3	77	"%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),
83d5cc01	85	TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
dbf498fb	86	TEST(INSERTED), TEST(RATE_CONTROL),
3f52b7e3 MP	87	TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER),
3f52b7e3 MP	88	TEST(MPSP_RECIPIENT));
5bade101	89	#undef TEST
e9f207f0 JB	90	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	91	}
	92	STA_OPS(flags);
	93
	94	static ssize_t sta_num_ps_buf_frames_read(struct file *file,
	95	char __user *userbuf,
	96	size_t count, loff_t *ppos)
	97	{
e9f207f0	98	struct sta_info *sta = file->private_data;
948d887d JB	99	char buf[17IEEE80211_NUM_ACS], p = buf;
	100	int ac;
	101
	102	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
	103	p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
	104	skb_queue_len(&sta->ps_tx_buf[ac]) +
	105	skb_queue_len(&sta->tx_filtered[ac]));
	106	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
e9f207f0 JB	107	}
	108	STA_OPS(num_ps_buf_frames);
	109
e9f207f0 JB	110	static ssize_t sta_inactive_ms_read(struct file file, char __user userbuf,
	111	size_t count, loff_t *ppos)
	112	{
e9f207f0	113	struct sta_info *sta = file->private_data;
07caf9d6 EP	114	return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
07caf9d6 EP	115	jiffies_to_msecs(jiffies - sta->last_rx));
e9f207f0 JB	116	}
	117	STA_OPS(inactive_ms);
	118
ebe27c91 MSS	119
	120	static ssize_t sta_connected_time_read(struct file file, char __user userbuf,
	121	size_t count, loff_t *ppos)
	122	{
	123	struct sta_info *sta = file->private_data;
	124	struct timespec uptime;
	125	struct tm result;
	126	long connected_time_secs;
	127	char buf[100];
	128	int res;
18171520	129	ktime_get_ts(&uptime);
ebe27c91 MSS	130	connected_time_secs = uptime.tv_sec - sta->last_connected;
	131	time_to_tm(connected_time_secs, 0, &result);
	132	result.tm_year -= 70;
	133	result.tm_mday -= 1;
	134	res = scnprintf(buf, sizeof(buf),
7762bb02	135	"years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
ebe27c91 MSS	136	result.tm_year, result.tm_mon, result.tm_mday,
	137	result.tm_hour, result.tm_min, result.tm_sec);
	138	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	139	}
	140	STA_OPS(connected_time);
	141
	142
	143
e9f207f0 JB	144	static ssize_t sta_last_seq_ctrl_read(struct file file, char __user userbuf,
	145	size_t count, loff_t *ppos)
	146	{
5a306f58	147	char buf[15IEEE80211_NUM_TIDS], p = buf;
e9f207f0 JB	148	int i;
e9f207f0 JB	149	struct sta_info *sta = file->private_data;
5a306f58	150	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
e9f207f0	151	p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
ba9b07d0	152	le16_to_cpu(sta->last_seq_ctrl[i]));
e9f207f0 JB	153	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	154	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	155	}
	156	STA_OPS(last_seq_ctrl);
	157
eb2ba62e RR	158	static ssize_t sta_agg_status_read(struct file file, char __user userbuf,
	159	size_t count, loff_t *ppos)
	160	{
5a306f58	161	char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
eb2ba62e RR	162	int i;
eb2ba62e RR	163	struct sta_info *sta = file->private_data;
dd318575 JB	164	struct tid_ampdu_rx *tid_rx;
	165	struct tid_ampdu_tx *tid_tx;
	166
	167	rcu_read_lock();
eb2ba62e	168
e0b20f1c	169	p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
386aa23d	170	sta->ampdu_mlme.dialog_token_allocator + 1);
e0b20f1c	171	p += scnprintf(p, sizeof(buf) + buf - p,
14b058bb	172	"TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
dd318575	173
5a306f58	174	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
dd318575 JB	175	tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
	176	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
	177
e0b20f1c	178	p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
dd318575	179	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
e0b20f1c	180	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	181	tid_rx ? tid_rx->dialog_token : 0);
e0b20f1c	182	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
dd318575	183	tid_rx ? tid_rx->ssn : 0);
386aa23d	184
dd318575	185	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
e0b20f1c	186	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	187	tid_tx ? tid_tx->dialog_token : 0);
e0b20f1c	188	p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
dd318575	189	tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
e0b20f1c	190	p += scnprintf(p, sizeof(buf) + buf - p, "\n");
386aa23d	191	}
dd318575	192	rcu_read_unlock();
eb2ba62e RR	193
	194	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	195	}
a75b4363 JB	196
	197	static ssize_t sta_agg_status_write(struct file file, const char __user userbuf,
	198	size_t count, loff_t *ppos)
	199	{
c4d2ffac	200	char _buf[12] = {}, *buf = _buf;
a75b4363 JB	201	struct sta_info *sta = file->private_data;
	202	bool start, tx;
	203	unsigned long tid;
	204	int ret;
	205
	206	if (count > sizeof(_buf))
	207	return -EINVAL;
	208
	209	if (copy_from_user(buf, userbuf, count))
	210	return -EFAULT;
	211
	212	buf[sizeof(_buf) - 1] = '\0';
	213
	214	if (strncmp(buf, "tx ", 3) == 0) {
	215	buf += 3;
	216	tx = true;
	217	} else if (strncmp(buf, "rx ", 3) == 0) {
	218	buf += 3;
	219	tx = false;
	220	} else
	221	return -EINVAL;
	222
	223	if (strncmp(buf, "start ", 6) == 0) {
	224	buf += 6;
	225	start = true;
	226	if (!tx)
	227	return -EINVAL;
	228	} else if (strncmp(buf, "stop ", 5) == 0) {
	229	buf += 5;
	230	start = false;
	231	} else
	232	return -EINVAL;
	233
4b5511eb AP	234	ret = kstrtoul(buf, 0, &tid);
	235	if (ret)
	236	return ret;
a75b4363	237
5a306f58	238	if (tid >= IEEE80211_NUM_TIDS)
a75b4363 JB	239	return -EINVAL;
	240
	241	if (tx) {
	242	if (start)
bd2ce6e4	243	ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
a75b4363	244	else
6a8579d0	245	ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
a75b4363	246	} else {
53f73c09 JB	247	__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
53f73c09 JB	248	3, true);
a75b4363 JB	249	ret = 0;
	250	}
	251
	252	return ret ?: count;
	253	}
	254	STA_OPS_RW(agg_status);
eb2ba62e	255
64491f0e JB	256	static ssize_t sta_ht_capa_read(struct file file, char __user userbuf,
	257	size_t count, loff_t *ppos)
	258	{
7db94e21 LR	259	#define PRINT_HT_CAP(_cond, _str) \
	260	do { \
	261	if (_cond) \
	262	p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
	263	} while (0)
4c82bf8e	264	char buf[512], *p = buf;
64491f0e JB	265	int i;
	266	struct sta_info *sta = file->private_data;
	267	struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
	268
	269	p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
	270	htc->ht_supported ? "" : "not ");
	271	if (htc->ht_supported) {
cb136f54	272	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
7db94e21	273
c15cf5fc	274	PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
7db94e21 LR	275	PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
	276	PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
	277
	278	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
	279	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
	280	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
	281
	282	PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
	283	PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
	284	PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
	285	PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
	286
	287	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
	288	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
	289	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
	290	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
	291
	292	PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
	293
7db94e21	294	PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
904603f9 BG	295	"3839 bytes");
904603f9 BG	296	PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
7db94e21 LR	297	"7935 bytes");
	298
	299	/*
	300	* For beacons and probe response this would mean the BSS
	301	* does or does not allow the usage of DSSS/CCK HT40.
	302	* Otherwise it means the STA does or does not use
	303	* DSSS/CCK HT40.
	304	*/
	305	PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
	306	PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
	307
	308	/* BIT(13) is reserved */
	309
	310	PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
	311
	312	PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
	313
64491f0e JB	314	p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
	315	htc->ampdu_factor, htc->ampdu_density);
	316	p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
9da3e068	317
64491f0e JB	318	for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
	319	p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
	320	htc->mcs.rx_mask[i]);
9da3e068 LR	321	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	322
	323	/* If not set this is meaningless */
	324	if (le16_to_cpu(htc->mcs.rx_highest)) {
	325	p += scnprintf(p, sizeof(buf)+buf-p,
	326	"MCS rx highest: %d Mbps\n",
	327	le16_to_cpu(htc->mcs.rx_highest));
	328	}
	329
64491f0e JB	330	p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
	331	htc->mcs.tx_params);
	332	}
	333
	334	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	335	}
	336	STA_OPS(ht_capa);
	337
90fcba65 JB	338	static ssize_t sta_vht_capa_read(struct file file, char __user userbuf,
	339	size_t count, loff_t *ppos)
	340	{
	341	char buf[128], *p = buf;
	342	struct sta_info *sta = file->private_data;
	343	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
	344
	345	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
	346	vhtc->vht_supported ? "" : "not ");
	347	if (vhtc->vht_supported) {
	348	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
	349
	350	p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
	351	le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
	352	if (vhtc->vht_mcs.rx_highest)
	353	p += scnprintf(p, sizeof(buf)+buf-p,
	354	"MCS RX highest: %d Mbps\n",
	355	le16_to_cpu(vhtc->vht_mcs.rx_highest));
	356	p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
	357	le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
	358	if (vhtc->vht_mcs.tx_highest)
	359	p += scnprintf(p, sizeof(buf)+buf-p,
	360	"MCS TX highest: %d Mbps\n",
	361	le16_to_cpu(vhtc->vht_mcs.tx_highest));
	362	}
	363
	364	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	365	}
	366	STA_OPS(vht_capa);
	367
91b8c050 S	368	static ssize_t sta_current_tx_rate_read(struct file file, char __user userbuf,
	369	size_t count, loff_t *ppos)
	370	{
	371	struct sta_info *sta = file->private_data;
	372	struct rate_info rinfo;
	373	u16 rate;
	374	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
	375	rate = cfg80211_calculate_bitrate(&rinfo);
	376
	377	return mac80211_format_buffer(userbuf, count, ppos,
	378	"%d.%d MBit/s\n",
	379	rate/10, rate%10);
	380	}
	381	STA_OPS(current_tx_rate);
	382
1f2e651c S	383	static ssize_t sta_last_rx_rate_read(struct file file, char __user userbuf,
	384	size_t count, loff_t *ppos)
	385	{
	386	struct sta_info *sta = file->private_data;
	387	struct rate_info rinfo;
	388	u16 rate;
	389
	390	sta_set_rate_info_rx(sta, &rinfo);
	391
	392	rate = cfg80211_calculate_bitrate(&rinfo);
	393
	394	return mac80211_format_buffer(userbuf, count, ppos,
	395	"%d.%d MBit/s\n",
	396	rate/10, rate%10);
	397	}
	398	STA_OPS(last_rx_rate);
	399
ad38bfc9 MG	400	static int
	401	sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
	402	char *buf, int pos, int bufsz)
	403	{
	404	int i;
	405	int range_count = tx_latency->n_ranges;
	406	u32 *bin_ranges = tx_latency->ranges;
	407
	408	pos += scnprintf(buf + pos, bufsz - pos,
	409	"Station\t\t\tTID\tMax\tAvg");
	410	if (range_count) {
	411	pos += scnprintf(buf + pos, bufsz - pos,
	412	"\t<=%d", bin_ranges[0]);
	413	for (i = 0; i < range_count - 1; i++)
	414	pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
	415	bin_ranges[i], bin_ranges[i+1]);
	416	pos += scnprintf(buf + pos, bufsz - pos,
	417	"\t%d<", bin_ranges[range_count - 1]);
	418	}
	419
	420	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	421
	422	return pos;
	423	}
	424
	425	static int
	426	sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
	427	struct ieee80211_tx_latency_stat *tx_lat,
	428	char *buf, int pos, int bufsz, int tid)
	429	{
	430	u32 avg = 0;
	431	int j;
	432	int bin_count = tx_lat->bin_count;
	433
	434	pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
	435	/* make sure you don't divide in 0 */
	436	if (tx_lat->counter)
	437	avg = tx_lat->sum / tx_lat->counter;
	438
	439	pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
	440	tx_lat->max, avg);
	441
	442	if (tx_lat_range->n_ranges && tx_lat->bins)
	443	for (j = 0; j < bin_count; j++)
	444	pos += scnprintf(buf + pos, bufsz - pos,
	445	"\t%d", tx_lat->bins[j]);
	446	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	447
	448	return pos;
	449	}
	450
	451	/*
	452	* Output Tx latency statistics station && restart all statistics information
	453	*/
	454	static ssize_t sta_tx_latency_stat_read(struct file *file,
	455	char __user *userbuf,
	456	size_t count, loff_t *ppos)
	457	{
	458	struct sta_info *sta = file->private_data;
	459	struct ieee80211_local *local = sta->local;
	460	struct ieee80211_tx_latency_bin_ranges *tx_latency;
	461	char *buf;
	462	int bufsz, ret, i;
	463	int pos = 0;
464
465	bufsz = 20 * IEEE80211_NUM_TIDS *
466	sizeof(struct ieee80211_tx_latency_stat);
467	buf = kzalloc(bufsz, GFP_KERNEL);
468	if (!buf)
469	return -ENOMEM;
470
471	rcu_read_lock();
472
473	tx_latency = rcu_dereference(local->tx_latency);
474
475	if (!sta->tx_lat) {
476	pos += scnprintf(buf + pos, bufsz - pos,
477	"Tx latency statistics are not enabled\n");
478	goto unlock;
479	}
480
481	pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);
482
483	pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
484	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
485	pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
486	buf, pos, bufsz, i);
487	unlock:
488	rcu_read_unlock();
489
490	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
491	kfree(buf);
492
493	return ret;
494	}
495	STA_OPS(tx_latency_stat);
496
497	static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
498	const char __user *userbuf,
499	size_t count, loff_t *ppos)
500	{
501	u32 *bins;
502	int bin_count;
503	struct sta_info *sta = file->private_data;
504	int i;
505
506	if (!sta->tx_lat)
507	return -EINVAL;
508
509	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
510	bins = sta->tx_lat[i].bins;
511	bin_count = sta->tx_lat[i].bin_count;
512
513	sta->tx_lat[i].max = 0;
514	sta->tx_lat[i].sum = 0;
515	sta->tx_lat[i].counter = 0;
516
517	if (bin_count)
518	memset(bins, 0, bin_count * sizeof(u32));
519	}
520
521	return count;
522	}
523	STA_OPS_W(tx_latency_stat_reset);
524
e9f207f0	525	#define DEBUGFS_ADD(name) \
7bcfaf2f	526	debugfs_create_file(#name, 0400, \
e9f207f0 JB	527	sta->debugfs.dir, sta, &sta_ ##name## _ops);
e9f207f0 JB	528
2826bcd8 FF	529	#define DEBUGFS_ADD_COUNTER(name, field) \
	530	if (sizeof(sta->field) == sizeof(u32)) \
	531	debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
	532	(u32 *) &sta->field); \
	533	else \
	534	debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
	535	(u64 *) &sta->field);
e9f207f0 JB	536
	537	void ieee80211_sta_debugfs_add(struct sta_info *sta)
	538	{
77d2ece6 SM	539	struct ieee80211_local *local = sta->local;
77d2ece6 SM	540	struct ieee80211_sub_if_data *sdata = sta->sdata;
295bafb4	541	struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
0c68ae26	542	u8 mac[3*ETH_ALEN];
e9f207f0	543
63044e9f JB	544	sta->debugfs.add_has_run = true;
63044e9f JB	545
e9f207f0 JB	546	if (!stations_dir)
	547	return;
	548
0c68ae26	549	snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
e9f207f0	550
63044e9f JB	551	/*
	552	* This might fail due to a race condition:
	553	* When mac80211 unlinks a station, the debugfs entries
	554	* remain, but it is already possible to link a new
	555	* station with the same address which triggers adding
	556	* it to debugfs; therefore, if the old station isn't
	557	* destroyed quickly enough the old station's debugfs
	558	* dir might still be around.
	559	*/
0795af57	560	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
e9f207f0 JB	561	if (!sta->debugfs.dir)
	562	return;
	563
	564	DEBUGFS_ADD(flags);
	565	DEBUGFS_ADD(num_ps_buf_frames);
e9f207f0	566	DEBUGFS_ADD(inactive_ms);
ebe27c91	567	DEBUGFS_ADD(connected_time);
e9f207f0	568	DEBUGFS_ADD(last_seq_ctrl);
eb2ba62e	569	DEBUGFS_ADD(agg_status);
386aa23d	570	DEBUGFS_ADD(dev);
386aa23d	571	DEBUGFS_ADD(last_signal);
78e443e4	572	DEBUGFS_ADD(beacon_loss_count);
64491f0e	573	DEBUGFS_ADD(ht_capa);
90fcba65	574	DEBUGFS_ADD(vht_capa);
db94357d	575	DEBUGFS_ADD(last_ack_signal);
91b8c050	576	DEBUGFS_ADD(current_tx_rate);
1f2e651c	577	DEBUGFS_ADD(last_rx_rate);
ad38bfc9 MG	578	DEBUGFS_ADD(tx_latency_stat);
ad38bfc9 MG	579	DEBUGFS_ADD(tx_latency_stat_reset);
2826bcd8 FF	580
	581	DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
	582	DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
	583	DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
	584	DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
	585	DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
	586	DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
	587	DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
	588	DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
	589	DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
	590	DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
	591	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
77d2ece6	592
7cf1f14e JB	593	if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
	594	debugfs_create_x32("driver_buffered_tids", 0400,
	595	sta->debugfs.dir,
	596	(u32 *)&sta->driver_buffered_tids);
	597	else
	598	debugfs_create_x64("driver_buffered_tids", 0400,
	599	sta->debugfs.dir,
	600	(u64 *)&sta->driver_buffered_tids);
	601
77d2ece6	602	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
e9f207f0 JB	603	}
	604
	605	void ieee80211_sta_debugfs_remove(struct sta_info *sta)
	606	{
77d2ece6 SM	607	struct ieee80211_local *local = sta->local;
	608	struct ieee80211_sub_if_data *sdata = sta->sdata;
	609
	610	drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
7bcfaf2f	611	debugfs_remove_recursive(sta->debugfs.dir);
e9f207f0 JB	612	sta->debugfs.dir = NULL;
e9f207f0 JB	613	}