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linux/net/mac80211/debugfs_sta.c

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/*
* 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
* Copyright(c) 2016 Intel Deutschland 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_OPS(name) \
static const struct file_operations sta_ ##name## _ops = { \
.read = sta_##name##_read, \
.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);
static const char * const sta_flag_names[] = {
#define FLAG(F) [WLAN_STA_##F] = #F
FLAG(AUTH),
FLAG(ASSOC),
FLAG(PS_STA),
FLAG(AUTHORIZED),
FLAG(SHORT_PREAMBLE),
FLAG(WDS),
FLAG(CLEAR_PS_FILT),
FLAG(MFP),
FLAG(BLOCK_BA),
FLAG(PS_DRIVER),
FLAG(PSPOLL),
FLAG(TDLS_PEER),
FLAG(TDLS_PEER_AUTH),
FLAG(TDLS_INITIATOR),
FLAG(TDLS_CHAN_SWITCH),
FLAG(TDLS_OFF_CHANNEL),
FLAG(TDLS_WIDER_BW),
FLAG(UAPSD),
FLAG(SP),
FLAG(4ADDR_EVENT),
FLAG(INSERTED),
FLAG(RATE_CONTROL),
FLAG(TOFFSET_KNOWN),
FLAG(MPSP_OWNER),
FLAG(MPSP_RECIPIENT),
FLAG(PS_DELIVER),
#undef FLAG
};
static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf;
char *end = buf + sizeof(buf) - 1;
struct sta_info *sta = file->private_data;
unsigned int flg;
BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS);
for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) {
if (test_sta_flag(sta, flg))
pos += scnprintf(pos, end - pos, "%s\n",
sta_flag_names[flg]);
}
return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
}
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_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);
#define AQM_TXQ_ENTRY_LEN 130
static ssize_t sta_aqm_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;
size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
struct txq_info *txqi;
ssize_t rv;
int i;
if (!buf)
return -ENOMEM;
spin_lock_bh(&local->fq.lock);
rcu_read_lock();
p += scnprintf(p,
bufsz+buf-p,
"target %uus interval %uus ecn %s\n",
codel_time_to_us(sta->cparams.target),
codel_time_to_us(sta->cparams.interval),
sta->cparams.ecn ? "yes" : "no");
p += scnprintf(p,
bufsz+buf-p,
"tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
txqi = to_txq_info(sta->sta.txq[i]);
p += scnprintf(p, bufsz+buf-p,
"%d %d %u %u %u %u %u %u %u %u %u\n",
txqi->txq.tid,
txqi->txq.ac,
txqi->tin.backlog_bytes,
txqi->tin.backlog_packets,
txqi->tin.flows,
txqi->cstats.drop_count,
txqi->cstats.ecn_mark,
txqi->tin.overlimit,
txqi->tin.collisions,
txqi->tin.tx_bytes,
txqi->tin.tx_packets);
}
rcu_read_unlock();
spin_unlock_bh(&local->fq.lock);
rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
kfree(buf);
return rv;
}
STA_OPS(aqm);
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++) {
bool tid_rx_valid;
tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
tid_rx_valid = test_bit(i, sta->ampdu_mlme.agg_session_valid);
p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x",
tid_rx_valid);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
tid_rx_valid ?
sta->ampdu_mlme.tid_rx_token[i] : 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[25] = {}, *buf = _buf;
struct sta_info *sta = file->private_data;
bool start, tx;
unsigned long tid;
char *pos;
int ret, timeout = 5000;
if (count > sizeof(_buf))
return -EINVAL;
if (copy_from_user(buf, userbuf, count))
return -EFAULT;
buf[sizeof(_buf) - 1] = '\0';
pos = buf;
buf = strsep(&pos, " ");
if (!buf)
return -EINVAL;
if (!strcmp(buf, "tx"))
tx = true;
else if (!strcmp(buf, "rx"))
tx = false;
else
return -EINVAL;
buf = strsep(&pos, " ");
if (!buf)
return -EINVAL;
if (!strcmp(buf, "start")) {
start = true;
if (!tx)
return -EINVAL;
} else if (!strcmp(buf, "stop")) {
start = false;
} else {
return -EINVAL;
}
buf = strsep(&pos, " ");
if (!buf)
return -EINVAL;
if (sscanf(buf, "timeout=%d", &timeout) == 1) {
buf = strsep(&pos, " ");
if (!buf || !tx || !start)
return -EINVAL;
}
ret = kstrtoul(buf, 0, &tid);
if (ret || tid >= IEEE80211_NUM_TIDS)
return -EINVAL;
if (tx) {
if (start)
ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
timeout);
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[512], *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);
#define PFLAG(a, b) \
do { \
if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
p += scnprintf(p, sizeof(buf) + buf - p, \
"\t\t%s\n", b); \
} while (0)
switch (vhtc->cap & 0x3) {
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tMAX-MPDU-3895\n");
break;
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tMAX-MPDU-7991\n");
break;
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tMAX-MPDU-11454\n");
break;
default:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tMAX-MPDU-UNKNOWN\n");
};
switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
case 0:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\t80Mhz\n");
break;
case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\t160Mhz\n");
break;
case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\t80+80Mhz\n");
break;
default:
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tUNKNOWN-MHZ: 0x%x\n",
(vhtc->cap >> 2) & 0x3);
};
PFLAG(RXLDPC, "RXLDPC");
PFLAG(SHORT_GI_80, "SHORT-GI-80");
PFLAG(SHORT_GI_160, "SHORT-GI-160");
PFLAG(TXSTBC, "TXSTBC");
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tBEAMFORMEE-STS: 0x%x\n",
(vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tSOUNDING-DIMENSIONS: 0x%x\n",
(vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
>> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
PFLAG(VHT_TXOP_PS, "TXOP-PS");
PFLAG(HTC_VHT, "HTC-VHT");
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
(vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
"LINK-ADAPTATION-VHT-UNSOL-MFB");
p += scnprintf(p, sizeof(buf) + buf - p,
"\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
(vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
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);
#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];
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(aid);
DEBUGFS_ADD(num_ps_buf_frames);
DEBUGFS_ADD(last_seq_ctrl);
DEBUGFS_ADD(agg_status);
DEBUGFS_ADD(ht_capa);
DEBUGFS_ADD(vht_capa);
DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
if (local->ops->wake_tx_queue)
DEBUGFS_ADD(aqm);
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)
{
debugfs_remove_recursive(sta->debugfs_dir);
sta->debugfs_dir = NULL;
}
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