[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),
			    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 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),
a74a8c84 JB	80	sta->sta.wme ? "WME\n" : "",
a74a8c84 JB	81	TEST(WDS), TEST(CLEAR_PS_FILT),
5bade101 JB	82	TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
5bade101 JB	83	TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
83d5cc01	84	TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),
dbf498fb	85	TEST(INSERTED), TEST(RATE_CONTROL),
3f52b7e3 MP	86	TEST(TOFFSET_KNOWN), TEST(MPSP_OWNER),
3f52b7e3 MP	87	TEST(MPSP_RECIPIENT));
5bade101	88	#undef TEST
e9f207f0 JB	89	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	90	}
	91	STA_OPS(flags);
	92
	93	static ssize_t sta_num_ps_buf_frames_read(struct file *file,
	94	char __user *userbuf,
	95	size_t count, loff_t *ppos)
	96	{
e9f207f0	97	struct sta_info *sta = file->private_data;
948d887d JB	98	char buf[17IEEE80211_NUM_ACS], p = buf;
	99	int ac;
	100
	101	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
	102	p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
	103	skb_queue_len(&sta->ps_tx_buf[ac]) +
	104	skb_queue_len(&sta->tx_filtered[ac]));
	105	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
e9f207f0 JB	106	}
	107	STA_OPS(num_ps_buf_frames);
	108
e9f207f0 JB	109	static ssize_t sta_inactive_ms_read(struct file file, char __user userbuf,
	110	size_t count, loff_t *ppos)
	111	{
e9f207f0	112	struct sta_info *sta = file->private_data;
07caf9d6 EP	113	return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
07caf9d6 EP	114	jiffies_to_msecs(jiffies - sta->last_rx));
e9f207f0 JB	115	}
	116	STA_OPS(inactive_ms);
	117
ebe27c91 MSS	118
	119	static ssize_t sta_connected_time_read(struct file file, char __user userbuf,
	120	size_t count, loff_t *ppos)
	121	{
	122	struct sta_info *sta = file->private_data;
	123	struct timespec uptime;
	124	struct tm result;
	125	long connected_time_secs;
	126	char buf[100];
	127	int res;
18171520	128	ktime_get_ts(&uptime);
ebe27c91 MSS	129	connected_time_secs = uptime.tv_sec - sta->last_connected;
	130	time_to_tm(connected_time_secs, 0, &result);
	131	result.tm_year -= 70;
	132	result.tm_mday -= 1;
	133	res = scnprintf(buf, sizeof(buf),
7762bb02	134	"years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
ebe27c91 MSS	135	result.tm_year, result.tm_mon, result.tm_mday,
	136	result.tm_hour, result.tm_min, result.tm_sec);
	137	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	138	}
	139	STA_OPS(connected_time);
	140
	141
	142
e9f207f0 JB	143	static ssize_t sta_last_seq_ctrl_read(struct file file, char __user userbuf,
	144	size_t count, loff_t *ppos)
	145	{
5a306f58	146	char buf[15IEEE80211_NUM_TIDS], p = buf;
e9f207f0 JB	147	int i;
e9f207f0 JB	148	struct sta_info *sta = file->private_data;
5a306f58	149	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
e9f207f0	150	p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
ba9b07d0	151	le16_to_cpu(sta->last_seq_ctrl[i]));
e9f207f0 JB	152	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	153	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	154	}
	155	STA_OPS(last_seq_ctrl);
	156
eb2ba62e RR	157	static ssize_t sta_agg_status_read(struct file file, char __user userbuf,
	158	size_t count, loff_t *ppos)
	159	{
5a306f58	160	char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
eb2ba62e RR	161	int i;
eb2ba62e RR	162	struct sta_info *sta = file->private_data;
dd318575 JB	163	struct tid_ampdu_rx *tid_rx;
	164	struct tid_ampdu_tx *tid_tx;
	165
	166	rcu_read_lock();
eb2ba62e	167
e0b20f1c	168	p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
386aa23d	169	sta->ampdu_mlme.dialog_token_allocator + 1);
e0b20f1c	170	p += scnprintf(p, sizeof(buf) + buf - p,
0ab33703	171	"TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
dd318575	172
5a306f58	173	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
dd318575 JB	174	tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
	175	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
	176
e0b20f1c	177	p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
dd318575	178	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
e0b20f1c	179	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	180	tid_rx ? tid_rx->dialog_token : 0);
e0b20f1c	181	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
dd318575	182	tid_rx ? tid_rx->ssn : 0);
386aa23d	183
dd318575	184	p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
e0b20f1c	185	p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
dd318575	186	tid_tx ? tid_tx->dialog_token : 0);
e0b20f1c	187	p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
dd318575	188	tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
e0b20f1c	189	p += scnprintf(p, sizeof(buf) + buf - p, "\n");
386aa23d	190	}
dd318575	191	rcu_read_unlock();
eb2ba62e RR	192
	193	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	194	}
a75b4363 JB	195
	196	static ssize_t sta_agg_status_write(struct file file, const char __user userbuf,
	197	size_t count, loff_t *ppos)
	198	{
c4d2ffac	199	char _buf[12] = {}, *buf = _buf;
a75b4363 JB	200	struct sta_info *sta = file->private_data;
	201	bool start, tx;
	202	unsigned long tid;
	203	int ret;
	204
	205	if (count > sizeof(_buf))
	206	return -EINVAL;
	207
	208	if (copy_from_user(buf, userbuf, count))
	209	return -EFAULT;
	210
	211	buf[sizeof(_buf) - 1] = '\0';
	212
	213	if (strncmp(buf, "tx ", 3) == 0) {
	214	buf += 3;
	215	tx = true;
	216	} else if (strncmp(buf, "rx ", 3) == 0) {
	217	buf += 3;
	218	tx = false;
	219	} else
	220	return -EINVAL;
	221
	222	if (strncmp(buf, "start ", 6) == 0) {
	223	buf += 6;
	224	start = true;
	225	if (!tx)
	226	return -EINVAL;
	227	} else if (strncmp(buf, "stop ", 5) == 0) {
	228	buf += 5;
	229	start = false;
	230	} else
	231	return -EINVAL;
	232
4b5511eb AP	233	ret = kstrtoul(buf, 0, &tid);
	234	if (ret)
	235	return ret;
a75b4363	236
5a306f58	237	if (tid >= IEEE80211_NUM_TIDS)
a75b4363 JB	238	return -EINVAL;
	239
	240	if (tx) {
	241	if (start)
bd2ce6e4	242	ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
a75b4363	243	else
6a8579d0	244	ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
a75b4363	245	} else {
53f73c09 JB	246	__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
53f73c09 JB	247	3, true);
a75b4363 JB	248	ret = 0;
	249	}
	250
	251	return ret ?: count;
	252	}
	253	STA_OPS_RW(agg_status);
eb2ba62e	254
64491f0e JB	255	static ssize_t sta_ht_capa_read(struct file file, char __user userbuf,
	256	size_t count, loff_t *ppos)
	257	{
7db94e21 LR	258	#define PRINT_HT_CAP(_cond, _str) \
	259	do { \
	260	if (_cond) \
	261	p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
	262	} while (0)
4c82bf8e	263	char buf[512], *p = buf;
64491f0e JB	264	int i;
	265	struct sta_info *sta = file->private_data;
	266	struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
	267
	268	p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
	269	htc->ht_supported ? "" : "not ");
	270	if (htc->ht_supported) {
cb136f54	271	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
7db94e21	272
c15cf5fc	273	PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
7db94e21 LR	274	PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
	275	PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
	276
	277	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
	278	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
	279	PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
	280
	281	PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
	282	PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
	283	PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
	284	PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
	285
	286	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
	287	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
	288	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
	289	PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
	290
	291	PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
	292
7db94e21	293	PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
904603f9 BG	294	"3839 bytes");
904603f9 BG	295	PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
7db94e21 LR	296	"7935 bytes");
	297
	298	/*
	299	* For beacons and probe response this would mean the BSS
	300	* does or does not allow the usage of DSSS/CCK HT40.
	301	* Otherwise it means the STA does or does not use
	302	* DSSS/CCK HT40.
	303	*/
	304	PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
	305	PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
	306
	307	/* BIT(13) is reserved */
	308
	309	PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
	310
	311	PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
	312
64491f0e JB	313	p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
	314	htc->ampdu_factor, htc->ampdu_density);
	315	p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
9da3e068	316
64491f0e JB	317	for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
	318	p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
	319	htc->mcs.rx_mask[i]);
9da3e068 LR	320	p += scnprintf(p, sizeof(buf)+buf-p, "\n");
	321
	322	/* If not set this is meaningless */
	323	if (le16_to_cpu(htc->mcs.rx_highest)) {
	324	p += scnprintf(p, sizeof(buf)+buf-p,
	325	"MCS rx highest: %d Mbps\n",
	326	le16_to_cpu(htc->mcs.rx_highest));
	327	}
	328
64491f0e JB	329	p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
	330	htc->mcs.tx_params);
	331	}
	332
	333	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	334	}
	335	STA_OPS(ht_capa);
	336
90fcba65 JB	337	static ssize_t sta_vht_capa_read(struct file file, char __user userbuf,
	338	size_t count, loff_t *ppos)
	339	{
	340	char buf[128], *p = buf;
	341	struct sta_info *sta = file->private_data;
	342	struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
	343
	344	p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
	345	vhtc->vht_supported ? "" : "not ");
	346	if (vhtc->vht_supported) {
	347	p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
	348
	349	p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
	350	le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
	351	if (vhtc->vht_mcs.rx_highest)
	352	p += scnprintf(p, sizeof(buf)+buf-p,
	353	"MCS RX highest: %d Mbps\n",
	354	le16_to_cpu(vhtc->vht_mcs.rx_highest));
	355	p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
	356	le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
	357	if (vhtc->vht_mcs.tx_highest)
	358	p += scnprintf(p, sizeof(buf)+buf-p,
	359	"MCS TX highest: %d Mbps\n",
	360	le16_to_cpu(vhtc->vht_mcs.tx_highest));
	361	}
	362
	363	return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
	364	}
	365	STA_OPS(vht_capa);
	366
91b8c050 S	367	static ssize_t sta_current_tx_rate_read(struct file file, char __user userbuf,
	368	size_t count, loff_t *ppos)
	369	{
	370	struct sta_info *sta = file->private_data;
	371	struct rate_info rinfo;
	372	u16 rate;
	373	sta_set_rate_info_tx(sta, &sta->last_tx_rate, &rinfo);
	374	rate = cfg80211_calculate_bitrate(&rinfo);
	375
	376	return mac80211_format_buffer(userbuf, count, ppos,
	377	"%d.%d MBit/s\n",
	378	rate/10, rate%10);
	379	}
	380	STA_OPS(current_tx_rate);
	381
1f2e651c S	382	static ssize_t sta_last_rx_rate_read(struct file file, char __user userbuf,
	383	size_t count, loff_t *ppos)
	384	{
	385	struct sta_info *sta = file->private_data;
	386	struct rate_info rinfo;
	387	u16 rate;
	388
	389	sta_set_rate_info_rx(sta, &rinfo);
	390
	391	rate = cfg80211_calculate_bitrate(&rinfo);
	392
	393	return mac80211_format_buffer(userbuf, count, ppos,
	394	"%d.%d MBit/s\n",
	395	rate/10, rate%10);
	396	}
	397	STA_OPS(last_rx_rate);
	398
ad38bfc9 MG	399	static int
	400	sta_tx_latency_stat_header(struct ieee80211_tx_latency_bin_ranges *tx_latency,
	401	char *buf, int pos, int bufsz)
	402	{
	403	int i;
	404	int range_count = tx_latency->n_ranges;
	405	u32 *bin_ranges = tx_latency->ranges;
	406
	407	pos += scnprintf(buf + pos, bufsz - pos,
	408	"Station\t\t\tTID\tMax\tAvg");
	409	if (range_count) {
	410	pos += scnprintf(buf + pos, bufsz - pos,
	411	"\t<=%d", bin_ranges[0]);
	412	for (i = 0; i < range_count - 1; i++)
	413	pos += scnprintf(buf + pos, bufsz - pos, "\t%d-%d",
	414	bin_ranges[i], bin_ranges[i+1]);
	415	pos += scnprintf(buf + pos, bufsz - pos,
	416	"\t%d<", bin_ranges[range_count - 1]);
	417	}
	418
	419	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	420
	421	return pos;
	422	}
	423
	424	static int
	425	sta_tx_latency_stat_table(struct ieee80211_tx_latency_bin_ranges *tx_lat_range,
	426	struct ieee80211_tx_latency_stat *tx_lat,
	427	char *buf, int pos, int bufsz, int tid)
	428	{
	429	u32 avg = 0;
	430	int j;
	431	int bin_count = tx_lat->bin_count;
	432
	433	pos += scnprintf(buf + pos, bufsz - pos, "\t\t\t%d", tid);
	434	/* make sure you don't divide in 0 */
	435	if (tx_lat->counter)
	436	avg = tx_lat->sum / tx_lat->counter;
	437
	438	pos += scnprintf(buf + pos, bufsz - pos, "\t%d\t%d",
	439	tx_lat->max, avg);
	440
	441	if (tx_lat_range->n_ranges && tx_lat->bins)
	442	for (j = 0; j < bin_count; j++)
	443	pos += scnprintf(buf + pos, bufsz - pos,
	444	"\t%d", tx_lat->bins[j]);
	445	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	446
	447	return pos;
	448	}
	449
	450	/*
	451	* Output Tx latency statistics station && restart all statistics information
	452	*/
	453	static ssize_t sta_tx_latency_stat_read(struct file *file,
	454	char __user *userbuf,
	455	size_t count, loff_t *ppos)
	456	{
	457	struct sta_info *sta = file->private_data;
	458	struct ieee80211_local *local = sta->local;
	459	struct ieee80211_tx_latency_bin_ranges *tx_latency;
	460	char *buf;
	461	int bufsz, ret, i;
	462	int pos = 0;
463
464	bufsz = 20 * IEEE80211_NUM_TIDS *
465	sizeof(struct ieee80211_tx_latency_stat);
466	buf = kzalloc(bufsz, GFP_KERNEL);
467	if (!buf)
468	return -ENOMEM;
469
470	rcu_read_lock();
471
472	tx_latency = rcu_dereference(local->tx_latency);
473
474	if (!sta->tx_lat) {
475	pos += scnprintf(buf + pos, bufsz - pos,
476	"Tx latency statistics are not enabled\n");
477	goto unlock;
478	}
479
480	pos = sta_tx_latency_stat_header(tx_latency, buf, pos, bufsz);
481
482	pos += scnprintf(buf + pos, bufsz - pos, "%pM\n", sta->sta.addr);
483	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
484	pos = sta_tx_latency_stat_table(tx_latency, &sta->tx_lat[i],
485	buf, pos, bufsz, i);
486	unlock:
487	rcu_read_unlock();
488
489	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
490	kfree(buf);
491
492	return ret;
493	}
494	STA_OPS(tx_latency_stat);
495
496	static ssize_t sta_tx_latency_stat_reset_write(struct file *file,
497	const char __user *userbuf,
498	size_t count, loff_t *ppos)
499	{
500	u32 *bins;
501	int bin_count;
502	struct sta_info *sta = file->private_data;
503	int i;
504
505	if (!sta->tx_lat)
506	return -EINVAL;
507
508	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
509	bins = sta->tx_lat[i].bins;
510	bin_count = sta->tx_lat[i].bin_count;
511
512	sta->tx_lat[i].max = 0;
513	sta->tx_lat[i].sum = 0;
514	sta->tx_lat[i].counter = 0;
515
516	if (bin_count)
517	memset(bins, 0, bin_count * sizeof(u32));
518	}
519
520	return count;
521	}
522	STA_OPS_W(tx_latency_stat_reset);
523
e9f207f0	524	#define DEBUGFS_ADD(name) \
7bcfaf2f	525	debugfs_create_file(#name, 0400, \
e9f207f0 JB	526	sta->debugfs.dir, sta, &sta_ ##name## _ops);
e9f207f0 JB	527
2826bcd8 FF	528	#define DEBUGFS_ADD_COUNTER(name, field) \
	529	if (sizeof(sta->field) == sizeof(u32)) \
	530	debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
	531	(u32 *) &sta->field); \
	532	else \
	533	debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
	534	(u64 *) &sta->field);
e9f207f0 JB	535
	536	void ieee80211_sta_debugfs_add(struct sta_info *sta)
	537	{
77d2ece6 SM	538	struct ieee80211_local *local = sta->local;
77d2ece6 SM	539	struct ieee80211_sub_if_data *sdata = sta->sdata;
295bafb4	540	struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
0c68ae26	541	u8 mac[3*ETH_ALEN];
e9f207f0	542
63044e9f JB	543	sta->debugfs.add_has_run = true;
63044e9f JB	544
e9f207f0 JB	545	if (!stations_dir)
	546	return;
	547
0c68ae26	548	snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
e9f207f0	549
63044e9f JB	550	/*
	551	* This might fail due to a race condition:
	552	* When mac80211 unlinks a station, the debugfs entries
	553	* remain, but it is already possible to link a new
	554	* station with the same address which triggers adding
	555	* it to debugfs; therefore, if the old station isn't
	556	* destroyed quickly enough the old station's debugfs
	557	* dir might still be around.
	558	*/
0795af57	559	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
e9f207f0 JB	560	if (!sta->debugfs.dir)
	561	return;
	562
	563	DEBUGFS_ADD(flags);
	564	DEBUGFS_ADD(num_ps_buf_frames);
e9f207f0	565	DEBUGFS_ADD(inactive_ms);
ebe27c91	566	DEBUGFS_ADD(connected_time);
e9f207f0	567	DEBUGFS_ADD(last_seq_ctrl);
eb2ba62e	568	DEBUGFS_ADD(agg_status);
386aa23d	569	DEBUGFS_ADD(dev);
386aa23d	570	DEBUGFS_ADD(last_signal);
78e443e4	571	DEBUGFS_ADD(beacon_loss_count);
64491f0e	572	DEBUGFS_ADD(ht_capa);
90fcba65	573	DEBUGFS_ADD(vht_capa);
db94357d	574	DEBUGFS_ADD(last_ack_signal);
91b8c050	575	DEBUGFS_ADD(current_tx_rate);
1f2e651c	576	DEBUGFS_ADD(last_rx_rate);
ad38bfc9 MG	577	DEBUGFS_ADD(tx_latency_stat);
ad38bfc9 MG	578	DEBUGFS_ADD(tx_latency_stat_reset);
2826bcd8 FF	579
	580	DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
	581	DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
	582	DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
	583	DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
	584	DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
	585	DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
	586	DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
	587	DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
	588	DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
	589	DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
	590	DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
77d2ece6	591
7cf1f14e JB	592	if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
	593	debugfs_create_x32("driver_buffered_tids", 0400,
	594	sta->debugfs.dir,
	595	(u32 *)&sta->driver_buffered_tids);
	596	else
	597	debugfs_create_x64("driver_buffered_tids", 0400,
	598	sta->debugfs.dir,
	599	(u64 *)&sta->driver_buffered_tids);
	600
77d2ece6	601	drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
e9f207f0 JB	602	}
	603
	604	void ieee80211_sta_debugfs_remove(struct sta_info *sta)
	605	{
77d2ece6 SM	606	struct ieee80211_local *local = sta->local;
	607	struct ieee80211_sub_if_data *sdata = sta->sdata;
	608
	609	drv_sta_remove_debugfs(local, sdata, &sta->sta, sta->debugfs.dir);
7bcfaf2f	610	debugfs_remove_recursive(sta->debugfs.dir);
e9f207f0 JB	611	sta->debugfs.dir = NULL;
e9f207f0 JB	612	}