[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>
 *
 * 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),
			    TEST(WME), 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 active\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>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/debugfs.h>
	12	#include <linux/ieee80211.h>
	13	#include "ieee80211_i.h"
	14	#include "debugfs.h"
	15	#include "debugfs_sta.h"
	16	#include "sta_info.h"
77d2ece6	17	#include "driver-ops.h"
e9f207f0 JB	18
	19	/* sta attributtes */
	20
07caf9d6	21	#define STA_READ(name, field, format_string) \
e9f207f0 JB	22	static ssize_t sta_ ##name## _read(struct file *file, \
	23	char __user *userbuf, \
	24	size_t count, loff_t *ppos) \
	25	{ \
e9f207f0	26	struct sta_info *sta = file->private_data; \
07caf9d6 EP	27	return mac80211_format_buffer(userbuf, count, ppos, \
07caf9d6 EP	28	format_string, sta->field); \
e9f207f0	29	}
07caf9d6 EP	30	#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
	31	#define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
	32	#define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
e9f207f0	33
e9f207f0 JB	34	#define STA_OPS(name) \
	35	static const struct file_operations sta_ ##name## _ops = { \
	36	.read = sta_##name##_read, \
234e3405	37	.open = simple_open, \
2b18ab36	38	.llseek = generic_file_llseek, \
e9f207f0 JB	39	}
e9f207f0 JB	40
ad38bfc9 MG	41	#define STA_OPS_W(name) \
	42	static const struct file_operations sta_ ##name## _ops = { \
	43	.write = sta_##name##_write, \
	44	.open = simple_open, \
	45	.llseek = generic_file_llseek, \
	46	}
	47
a75b4363 JB	48	#define STA_OPS_RW(name) \
	49	static const struct file_operations sta_ ##name## _ops = { \
	50	.read = sta_##name##_read, \
	51	.write = sta_##name##_write, \
234e3405	52	.open = simple_open, \
2b18ab36	53	.llseek = generic_file_llseek, \
a75b4363 JB	54	}
a75b4363 JB	55
e9f207f0 JB	56	#define STA_FILE(name, field, format) \
	57	STA_READ_##format(name, field) \
	58	STA_OPS(name)
	59
17741cdc	60	STA_FILE(aid, sta.aid, D);
47846c9b	61	STA_FILE(dev, sdata->name, S);
e9f207f0	62	STA_FILE(last_signal, last_signal, D);
db94357d	63	STA_FILE(last_ack_signal, last_ack_signal, D);
78e443e4	64	STA_FILE(beacon_loss_count, beacon_loss_count, D);
e9f207f0 JB	65
	66	static ssize_t sta_flags_read(struct file file, char __user userbuf,
	67	size_t count, loff_t *ppos)
	68	{
5bade101	69	char buf[121];
e9f207f0	70	struct sta_info *sta = file->private_data;
c2c98fde	71
5bade101 JB	72	#define TEST(flg) \
	73	test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
	74
	75	int res = scnprintf(buf, sizeof(buf),
3f52b7e3	76	"%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
5bade101 JB	77	TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
5bade101 JB	78	TEST(PS_DRIVER), TEST(AUTHORIZED),
fb4431bf	79	TEST(SHORT_PREAMBLE),
5bade101 JB	80	TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
	81	TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
	82	TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
83d5cc01	83	TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
dbf498fb	84	TEST(INSERTED), TEST(RATE_CONTROL),
3f52b7e3 MP	85	TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER),
3f52b7e3 MP	86	TEST(MPSP_RECIPIENT));
5bade101	87	#undef TEST
e9f207f0 JB	88	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	89	}
	90	STA_OPS(flags);
	91
	92	static ssize_t sta_num_ps_buf_frames_read(struct file *file,
	93	char __user *userbuf,
	94	size_t count, loff_t *ppos)
	95	{
e9f207f0	96	struct sta_info *sta = file->private_data;
948d887d JB	97	char buf[17IEEE80211_NUM_ACS], p = buf;
	98	int ac;
	99
	100	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
	101	p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
	102	skb_queue_len(&sta->ps_tx_buf[ac]) +
	103	skb_queue_len(&sta->tx_filtered[ac]));
	104	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
e9f207f0 JB	105	}
	106	STA_OPS(num_ps_buf_frames);
	107
e9f207f0 JB	108	static ssize_t sta_inactive_ms_read(struct file file, char __user userbuf,
	109	size_t count, loff_t *ppos)
	110	{
e9f207f0	111	struct sta_info *sta = file->private_data;
07caf9d6 EP	112	return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
07caf9d6 EP	113	jiffies_to_msecs(jiffies - sta->last_rx));
e9f207f0 JB	114	}
	115	STA_OPS(inactive_ms);
	116
ebe27c91 MSS	117
	118	static ssize_t sta_connected_time_read(struct file file, char __user userbuf,
	119	size_t count, loff_t *ppos)
	120	{
	121	struct sta_info *sta = file->private_data;
	122	struct timespec uptime;
	123	struct tm result;
	124	long connected_time_secs;
	125	char buf[100];
	126	int res;
18171520	127	ktime_get_ts(&uptime);
ebe27c91 MSS	128	connected_time_secs = uptime.tv_sec - sta->last_connected;
	129	time_to_tm(connected_time_secs, 0, &result);
	130	result.tm_year -= 70;
	131	result.tm_mday -= 1;
	132	res = scnprintf(buf, sizeof(buf),
7762bb02	133	"years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
ebe27c91 MSS	134	result.tm_year, result.tm_mon, result.tm_mday,
	135	result.tm_hour, result.tm_min, result.tm_sec);
	136	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	137	}
	138	STA_OPS(connected_time);
	139
	140
	141
e9f207f0 JB	142	static ssize_t sta_last_seq_ctrl_read(struct file file, char __user userbuf,
	143	size_t count, loff_t *ppos)
	144	{
5a306f58	145	char buf[15IEEE80211_NUM_TIDS], p = buf;
e9f207f0 JB	146	int i;
e9f207f0 JB	147	struct sta_info *sta = file->private_data;
5a306f58	148	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
e9f207f0	149	p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
ba9b07d0	150	le16_to_cpu(sta->last_seq_ctrl[i]));
e9f207f0 JB	151	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	152	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	153	}
	154	STA_OPS(last_seq_ctrl);
	155
eb2ba62e RR	156	static ssize_t sta_agg_status_read(struct file file, char __user userbuf,
	157	size_t count, loff_t *ppos)
	158	{
5a306f58	159	char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
eb2ba62e RR	160	int i;
eb2ba62e RR	161	struct sta_info *sta = file->private_data;
dd318575 JB	162	struct tid_ampdu_rx *tid_rx;
	163	struct tid_ampdu_tx *tid_tx;
	164
	165	rcu_read_lock();
eb2ba62e	166
e0b20f1c	167	p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
386aa23d	168	sta->ampdu_mlme.dialog_token_allocator + 1);
e0b20f1c	169	p += scnprintf(p, sizeof(buf) + buf - p,
0ab33703	170	"TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
dd318575	171
5a306f58	172	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
dd318575 JB	173	tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
	174	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
	175
e0b20f1c	176	p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
dd318575	177	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
e0b20f1c	178	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	179	tid_rx ? tid_rx->dialog_token : 0);
e0b20f1c	180	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
dd318575	181	tid_rx ? tid_rx->ssn : 0);
386aa23d	182
dd318575	183	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
e0b20f1c	184	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	185	tid_tx ? tid_tx->dialog_token : 0);
e0b20f1c	186	p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
dd318575	187	tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
e0b20f1c	188	p += scnprintf(p, sizeof(buf) + buf - p, "\n");
386aa23d	189	}
dd318575	190	rcu_read_unlock();
eb2ba62e RR	191
	192	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	193	}
a75b4363 JB	194
	195	static ssize_t sta_agg_status_write(struct file file, const char __user userbuf,
	196	size_t count, loff_t *ppos)
	197	{
c4d2ffac	198	char _buf[12] = {}, *buf = _buf;
a75b4363 JB	199	struct sta_info *sta = file->private_data;
	200	bool start, tx;
	201	unsigned long tid;
	202	int ret;
	203
	204	if (count > sizeof(_buf))
	205	return -EINVAL;
	206
	207	if (copy_from_user(buf, userbuf, count))
	208	return -EFAULT;
	209
	210	buf[sizeof(_buf) - 1] = '\0';
	211
	212	if (strncmp(buf, "tx ", 3) == 0) {
	213	buf += 3;
	214	tx = true;
	215	} else if (strncmp(buf, "rx ", 3) == 0) {
	216	buf += 3;
	217	tx = false;
	218	} else
	219	return -EINVAL;
	220
	221	if (strncmp(buf, "start ", 6) == 0) {
	222	buf += 6;
	223	start = true;
	224	if (!tx)
	225	return -EINVAL;
	226	} else if (strncmp(buf, "stop ", 5) == 0) {
	227	buf += 5;
	228	start = false;
	229	} else
	230	return -EINVAL;
	231
4b5511eb AP	232	ret = kstrtoul(buf, 0, &tid);
	233	if (ret)
	234	return ret;
a75b4363	235
5a306f58	236	if (tid >= IEEE80211_NUM_TIDS)
a75b4363 JB	237	return -EINVAL;
	238
	239	if (tx) {
	240	if (start)
bd2ce6e4	241	ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
a75b4363	242	else
6a8579d0	243	ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
a75b4363	244	} else {
53f73c09 JB	245	__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
53f73c09 JB	246	3, true);
a75b4363 JB	247	ret = 0;
	248	}
	249
	250	return ret ?: count;
	251	}
	252	STA_OPS_RW(agg_status);
eb2ba62e	253
64491f0e JB	254	static ssize_t sta_ht_capa_read(struct file file, char __user userbuf,
	255	size_t count, loff_t *ppos)
	256	{
7db94e21 LR	257	#define PRINT_HT_CAP(_cond, _str) \
	258	do { \
	259	if (_cond) \
	260	p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
	261	} while (0)
4c82bf8e	262	char buf[512], *p = buf;
64491f0e JB	263	int i;
	264	struct sta_info *sta = file->private_data;
	265	struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
	266
	267	p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
	268	htc->ht_supported ? "" : "not ");
	269	if (htc->ht_supported) {
cb136f54	270	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
7db94e21	271
c15cf5fc	272	PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
7db94e21 LR	273	PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
	274	PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
	275
	276	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
	277	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
	278	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
	279
	280	PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
	281	PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
	282	PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
	283	PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
	284
	285	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
	286	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
	287	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
	288	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
	289
	290	PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
	291
7db94e21	292	PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
904603f9 BG	293	"3839 bytes");
904603f9 BG	294	PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
7db94e21 LR	295	"7935 bytes");
	296
	297	/*
	298	* For beacons and probe response this would mean the BSS
	299	* does or does not allow the usage of DSSS/CCK HT40.
	300	* Otherwise it means the STA does or does not use
	301	* DSSS/CCK HT40.
	302	*/
	303	PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
	304	PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
	305
	306	/* BIT(13) is reserved */
	307
	308	PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
	309
	310	PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
	311
64491f0e JB	312	p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
	313	htc->ampdu_factor, htc->ampdu_density);
	314	p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
9da3e068	315
64491f0e JB	316	for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
	317	p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
	318	htc->mcs.rx_mask[i]);
9da3e068 LR	319	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	320
	321	/* If not set this is meaningless */
	322	if (le16_to_cpu(htc->mcs.rx_highest)) {
	323	p += scnprintf(p, sizeof(buf)+buf-p,
	324	"MCS rx highest: %d Mbps\n",
	325	le16_to_cpu(htc->mcs.rx_highest));
	326	}
	327
64491f0e JB	328	p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
	329	htc->mcs.tx_params);
	330	}
	331
	332	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	333	}
	334	STA_OPS(ht_capa);
	335
90fcba65 JB	336	static ssize_t sta_vht_capa_read(struct file file, char __user userbuf,
	337	size_t count, loff_t *ppos)
	338	{
	339	char buf[128], *p = buf;
	340	struct sta_info *sta = file->private_data;
	341	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
	342
	343	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
	344	vhtc->vht_supported ? "" : "not ");
	345	if (vhtc->vht_supported) {
	346	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
	347
	348	p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
	349	le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
	350	if (vhtc->vht_mcs.rx_highest)
	351	p += scnprintf(p, sizeof(buf)+buf-p,
	352	"MCS RX highest: %d Mbps\n",
	353	le16_to_cpu(vhtc->vht_mcs.rx_highest));
	354	p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
	355	le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
	356	if (vhtc->vht_mcs.tx_highest)
	357	p += scnprintf(p, sizeof(buf)+buf-p,
	358	"MCS TX highest: %d Mbps\n",
	359	le16_to_cpu(vhtc->vht_mcs.tx_highest));
	360	}
	361
	362	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	363	}
	364	STA_OPS(vht_capa);
	365
91b8c050 S	366	static ssize_t sta_current_tx_rate_read(struct file file, char __user userbuf,
	367	size_t count, loff_t *ppos)
	368	{
	369	struct sta_info *sta = file->private_data;
	370	struct rate_info rinfo;
	371	u16 rate;
	372	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
	373	rate = cfg80211_calculate_bitrate(&rinfo);
	374
	375	return mac80211_format_buffer(userbuf, count, ppos,
	376	"%d.%d MBit/s\n",
	377	rate/10, rate%10);
	378	}
	379	STA_OPS(current_tx_rate);
	380
1f2e651c S	381	static ssize_t sta_last_rx_rate_read(struct file file, char __user userbuf,
	382	size_t count, loff_t *ppos)
	383	{
	384	struct sta_info *sta = file->private_data;
	385	struct rate_info rinfo;
	386	u16 rate;
	387
	388	sta_set_rate_info_rx(sta, &rinfo);
	389
	390	rate = cfg80211_calculate_bitrate(&rinfo);
	391
	392	return mac80211_format_buffer(userbuf, count, ppos,
	393	"%d.%d MBit/s\n",
	394	rate/10, rate%10);
	395	}
	396	STA_OPS(last_rx_rate);
	397
ad38bfc9 MG	398	static int
	399	sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
	400	char *buf, int pos, int bufsz)
	401	{
	402	int i;
	403	int range_count = tx_latency->n_ranges;
	404	u32 *bin_ranges = tx_latency->ranges;
	405
	406	pos += scnprintf(buf + pos, bufsz - pos,
	407	"Station\t\t\tTID\tMax\tAvg");
	408	if (range_count) {
	409	pos += scnprintf(buf + pos, bufsz - pos,
	410	"\t<=%d", bin_ranges[0]);
	411	for (i = 0; i < range_count - 1; i++)
	412	pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
	413	bin_ranges[i], bin_ranges[i+1]);
	414	pos += scnprintf(buf + pos, bufsz - pos,
	415	"\t%d<", bin_ranges[range_count - 1]);
	416	}
	417
	418	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	419
	420	return pos;
	421	}
	422
	423	static int
	424	sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
	425	struct ieee80211_tx_latency_stat *tx_lat,
	426	char *buf, int pos, int bufsz, int tid)
	427	{
	428	u32 avg = 0;
	429	int j;
	430	int bin_count = tx_lat->bin_count;
	431
	432	pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
	433	/* make sure you don't divide in 0 */
	434	if (tx_lat->counter)
	435	avg = tx_lat->sum / tx_lat->counter;
	436
	437	pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
	438	tx_lat->max, avg);
	439
	440	if (tx_lat_range->n_ranges && tx_lat->bins)
	441	for (j = 0; j < bin_count; j++)
	442	pos += scnprintf(buf + pos, bufsz - pos,
	443	"\t%d", tx_lat->bins[j]);
	444	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	445
	446	return pos;
	447	}
	448
	449	/*
	450	* Output Tx latency statistics station && restart all statistics information
	451	*/
	452	static ssize_t sta_tx_latency_stat_read(struct file *file,
	453	char __user *userbuf,
	454	size_t count, loff_t *ppos)
	455	{
	456	struct sta_info *sta = file->private_data;
	457	struct ieee80211_local *local = sta->local;
	458	struct ieee80211_tx_latency_bin_ranges *tx_latency;
	459	char *buf;
	460	int bufsz, ret, i;
	461	int pos = 0;
462
463	bufsz = 20 * IEEE80211_NUM_TIDS *
464	sizeof(struct ieee80211_tx_latency_stat);
465	buf = kzalloc(bufsz, GFP_KERNEL);
466	if (!buf)
467	return -ENOMEM;
468
469	rcu_read_lock();
470
471	tx_latency = rcu_dereference(local->tx_latency);
472
473	if (!sta->tx_lat) {
474	pos += scnprintf(buf + pos, bufsz - pos,
475	"Tx latency statistics are not enabled\n");
476	goto unlock;
477	}
478
479	pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);
480
481	pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
482	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
483	pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
484	buf, pos, bufsz, i);
485	unlock:
486	rcu_read_unlock();
487
488	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
489	kfree(buf);
490
491	return ret;
492	}
493	STA_OPS(tx_latency_stat);
494
495	static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
496	const char __user *userbuf,
497	size_t count, loff_t *ppos)
498	{
499	u32 *bins;
500	int bin_count;
501	struct sta_info *sta = file->private_data;
502	int i;
503
504	if (!sta->tx_lat)
505	return -EINVAL;
506
507	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
508	bins = sta->tx_lat[i].bins;
509	bin_count = sta->tx_lat[i].bin_count;
510
511	sta->tx_lat[i].max = 0;
512	sta->tx_lat[i].sum = 0;
513	sta->tx_lat[i].counter = 0;
514
515	if (bin_count)
516	memset(bins, 0, bin_count * sizeof(u32));
517	}
518
519	return count;
520	}
521	STA_OPS_W(tx_latency_stat_reset);
522
e9f207f0	523	#define DEBUGFS_ADD(name) \
7bcfaf2f	524	debugfs_create_file(#name, 0400, \
e9f207f0 JB	525	sta->debugfs.dir, sta, &sta_ ##name## _ops);
e9f207f0 JB	526
2826bcd8 FF	527	#define DEBUGFS_ADD_COUNTER(name, field) \
	528	if (sizeof(sta->field) == sizeof(u32)) \
	529	debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
	530	(u32 *) &sta->field); \
	531	else \
	532	debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
	533	(u64 *) &sta->field);
e9f207f0 JB	534
	535	void ieee80211_sta_debugfs_add(struct sta_info *sta)
	536	{
77d2ece6 SM	537	struct ieee80211_local *local = sta->local;
77d2ece6 SM	538	struct ieee80211_sub_if_data *sdata = sta->sdata;
295bafb4	539	struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
0c68ae26	540	u8 mac[3*ETH_ALEN];
e9f207f0	541
63044e9f JB	542	sta->debugfs.add_has_run = true;
63044e9f JB	543
e9f207f0 JB	544	if (!stations_dir)
	545	return;
	546
0c68ae26	547	snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
e9f207f0	548
63044e9f JB	549	/*
	550	* This might fail due to a race condition:
	551	* When mac80211 unlinks a station, the debugfs entries
	552	* remain, but it is already possible to link a new
	553	* station with the same address which triggers adding
	554	* it to debugfs; therefore, if the old station isn't
	555	* destroyed quickly enough the old station's debugfs
	556	* dir might still be around.
	557	*/
0795af57	558	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
e9f207f0 JB	559	if (!sta->debugfs.dir)
	560	return;
	561
	562	DEBUGFS_ADD(flags);
	563	DEBUGFS_ADD(num_ps_buf_frames);
e9f207f0	564	DEBUGFS_ADD(inactive_ms);
ebe27c91	565	DEBUGFS_ADD(connected_time);
e9f207f0	566	DEBUGFS_ADD(last_seq_ctrl);
eb2ba62e	567	DEBUGFS_ADD(agg_status);
386aa23d	568	DEBUGFS_ADD(dev);
386aa23d	569	DEBUGFS_ADD(last_signal);
78e443e4	570	DEBUGFS_ADD(beacon_loss_count);
64491f0e	571	DEBUGFS_ADD(ht_capa);
90fcba65	572	DEBUGFS_ADD(vht_capa);
db94357d	573	DEBUGFS_ADD(last_ack_signal);
91b8c050	574	DEBUGFS_ADD(current_tx_rate);
1f2e651c	575	DEBUGFS_ADD(last_rx_rate);
ad38bfc9 MG	576	DEBUGFS_ADD(tx_latency_stat);
ad38bfc9 MG	577	DEBUGFS_ADD(tx_latency_stat_reset);
2826bcd8 FF	578
	579	DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
	580	DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
	581	DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
	582	DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
	583	DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
	584	DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
	585	DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
	586	DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
	587	DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
	588	DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
	589	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
77d2ece6	590
7cf1f14e JB	591	if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
	592	debugfs_create_x32("driver_buffered_tids", 0400,
	593	sta->debugfs.dir,
	594	(u32 *)&sta->driver_buffered_tids);
	595	else
	596	debugfs_create_x64("driver_buffered_tids", 0400,
	597	sta->debugfs.dir,
	598	(u64 *)&sta->driver_buffered_tids);
	599
77d2ece6	600	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
e9f207f0 JB	601	}
	602
	603	void ieee80211_sta_debugfs_remove(struct sta_info *sta)
	604	{
77d2ece6 SM	605	struct ieee80211_local *local = sta->local;
	606	struct ieee80211_sub_if_data *sdata = sta->sdata;
	607
	608	drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
7bcfaf2f	609	debugfs_remove_recursive(sta->debugfs.dir);
e9f207f0 JB	610	sta->debugfs.dir = NULL;
e9f207f0 JB	611	}