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linux/net/mac80211/debugfs_sta.c
Johannes Berg e5a9f8d046 mac80211: move station statistics into sub-structs 
Group station statistics by where they're (mostly) updated
(TX, RX and TX-status) and group them into sub-structs of
the struct sta_info.

Also rename the variables since the grouping now makes it
obvious where they belong.

This makes it easier to identify where the statistics are
updated in the code, and thus easier to think about them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-10-21 10:08:22 +02:00

394 lines
12 KiB
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
*
* 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 ssize_t sta_flags_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[121];
struct sta_info *sta = file->private_data;
#define TEST(flg) \
test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
int res = scnprintf(buf, sizeof(buf),
"%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
TEST(PS_DRIVER), TEST(AUTHORIZED),
TEST(SHORT_PREAMBLE),
sta->sta.wme ? "WME\n" : "",
TEST(WDS), TEST(CLEAR_PS_FILT),
TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
TEST(TDLS_PEER_AUTH), TEST(TDLS_INITIATOR),
TEST(TDLS_CHAN_SWITCH), TEST(TDLS_OFF_CHANNEL),
TEST(4ADDR_EVENT), TEST(INSERTED),
TEST(RATE_CONTROL), TEST(TOFFSET_KNOWN),
TEST(MPSP_OWNER), TEST(MPSP_RECIPIENT));
#undef TEST
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(flags);
static ssize_t sta_num_ps_buf_frames_read(struct file *file,
char __user *userbuf,
size_t count, loff_t *ppos)
{
struct sta_info *sta = file->private_data;
char buf[17*IEEE80211_NUM_ACS], *p = buf;
int ac;
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
skb_queue_len(&sta->ps_tx_buf[ac]) +
skb_queue_len(&sta->tx_filtered[ac]));
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(num_ps_buf_frames);
static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[15*IEEE80211_NUM_TIDS], *p = buf;
int i;
struct sta_info *sta = file->private_data;
for (i = 0; i < IEEE80211_NUM_TIDS; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
le16_to_cpu(sta->last_seq_ctrl[i]));
p += scnprintf(p, sizeof(buf)+buf-p, "\n");
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(last_seq_ctrl);
static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
int i;
struct sta_info *sta = file->private_data;
struct tid_ampdu_rx *tid_rx;
struct tid_ampdu_tx *tid_tx;
rcu_read_lock();
p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
sta->ampdu_mlme.dialog_token_allocator + 1);
p += scnprintf(p, sizeof(buf) + buf - p,
"TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
tid_rx ? tid_rx->dialog_token : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
tid_rx ? tid_rx->ssn : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
tid_tx ? tid_tx->dialog_token : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
p += scnprintf(p, sizeof(buf) + buf - p, "\n");
}
rcu_read_unlock();
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
size_t count, loff_t *ppos)
{
char _buf[12] = {}, *buf = _buf;
struct sta_info *sta = file->private_data;
bool start, tx;
unsigned long tid;
int ret;
if (count > sizeof(_buf))
return -EINVAL;
if (copy_from_user(buf, userbuf, count))
return -EFAULT;
buf[sizeof(_buf) - 1] = '\0';
if (strncmp(buf, "tx ", 3) == 0) {
buf += 3;
tx = true;
} else if (strncmp(buf, "rx ", 3) == 0) {
buf += 3;
tx = false;
} else
return -EINVAL;
if (strncmp(buf, "start ", 6) == 0) {
buf += 6;
start = true;
if (!tx)
return -EINVAL;
} else if (strncmp(buf, "stop ", 5) == 0) {
buf += 5;
start = false;
} else
return -EINVAL;
ret = kstrtoul(buf, 0, &tid);
if (ret)
return ret;
if (tid >= IEEE80211_NUM_TIDS)
return -EINVAL;
if (tx) {
if (start)
ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
else
ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
} else {
__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
3, true);
ret = 0;
}
return ret ?: count;
}
STA_OPS_RW(agg_status);
static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
#define PRINT_HT_CAP(_cond, _str) \
do { \
if (_cond) \
p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
} while (0)
char buf[512], *p = buf;
int i;
struct sta_info *sta = file->private_data;
struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
htc->ht_supported ? "" : "not ");
if (htc->ht_supported) {
p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
"3839 bytes");
PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
"7935 bytes");
/*
* For beacons and probe response this would mean the BSS
* does or does not allow the usage of DSSS/CCK HT40.
* Otherwise it means the STA does or does not use
* DSSS/CCK HT40.
*/
PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
/* BIT(13) is reserved */
PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
htc->ampdu_factor, htc->ampdu_density);
p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
htc->mcs.rx_mask[i]);
p += scnprintf(p, sizeof(buf)+buf-p, "\n");
/* If not set this is meaningless */
if (le16_to_cpu(htc->mcs.rx_highest)) {
p += scnprintf(p, sizeof(buf)+buf-p,
"MCS rx highest: %d Mbps\n",
le16_to_cpu(htc->mcs.rx_highest));
}
p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
htc->mcs.tx_params);
}
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(ht_capa);
static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[128], *p = buf;
struct sta_info *sta = file->private_data;
struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
vhtc->vht_supported ? "" : "not ");
if (vhtc->vht_supported) {
p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.8x\n", vhtc->cap);
p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
if (vhtc->vht_mcs.rx_highest)
p += scnprintf(p, sizeof(buf)+buf-p,
"MCS RX highest: %d Mbps\n",
le16_to_cpu(vhtc->vht_mcs.rx_highest));
p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
if (vhtc->vht_mcs.tx_highest)
p += scnprintf(p, sizeof(buf)+buf-p,
"MCS TX highest: %d Mbps\n",
le16_to_cpu(vhtc->vht_mcs.tx_highest));
}
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(vht_capa);
#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(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 (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;
}
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