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386 lines
12 KiB
C
386 lines
12 KiB
C
/*
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* Copyright 2003-2005 Devicescape Software, Inc.
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* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/debugfs.h>
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#include <linux/ieee80211.h>
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#include "ieee80211_i.h"
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#include "debugfs.h"
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#include "debugfs_sta.h"
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#include "sta_info.h"
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/* sta attributtes */
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#define STA_READ(name, field, format_string) \
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static ssize_t sta_ ##name## _read(struct file *file, \
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char __user *userbuf, \
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size_t count, loff_t *ppos) \
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{ \
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struct sta_info *sta = file->private_data; \
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return mac80211_format_buffer(userbuf, count, ppos, \
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format_string, sta->field); \
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}
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#define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
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#define STA_READ_U(name, field) STA_READ(name, field, "%u\n")
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#define STA_READ_S(name, field) STA_READ(name, field, "%s\n")
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#define STA_OPS(name) \
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static const struct file_operations sta_ ##name## _ops = { \
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.read = sta_##name##_read, \
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.open = mac80211_open_file_generic, \
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.llseek = generic_file_llseek, \
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}
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#define STA_OPS_RW(name) \
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static const struct file_operations sta_ ##name## _ops = { \
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.read = sta_##name##_read, \
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.write = sta_##name##_write, \
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.open = mac80211_open_file_generic, \
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.llseek = generic_file_llseek, \
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}
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#define STA_FILE(name, field, format) \
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STA_READ_##format(name, field) \
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STA_OPS(name)
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STA_FILE(aid, sta.aid, D);
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STA_FILE(dev, sdata->name, S);
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STA_FILE(last_signal, last_signal, D);
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static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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char buf[121];
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struct sta_info *sta = file->private_data;
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#define TEST(flg) \
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test_sta_flag(sta, WLAN_STA_##flg) ? #flg "\n" : ""
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int res = scnprintf(buf, sizeof(buf),
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"%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
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TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
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TEST(PS_DRIVER), TEST(AUTHORIZED),
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TEST(SHORT_PREAMBLE),
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TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
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TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
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TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
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TEST(TDLS_PEER_AUTH));
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#undef TEST
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return simple_read_from_buffer(userbuf, count, ppos, buf, res);
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}
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STA_OPS(flags);
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static ssize_t sta_num_ps_buf_frames_read(struct file *file,
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char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct sta_info *sta = file->private_data;
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char buf[17*IEEE80211_NUM_ACS], *p = buf;
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int ac;
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for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
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p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
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skb_queue_len(&sta->ps_tx_buf[ac]) +
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skb_queue_len(&sta->tx_filtered[ac]));
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return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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}
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STA_OPS(num_ps_buf_frames);
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static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct sta_info *sta = file->private_data;
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return mac80211_format_buffer(userbuf, count, ppos, "%d\n",
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jiffies_to_msecs(jiffies - sta->last_rx));
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}
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STA_OPS(inactive_ms);
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static ssize_t sta_connected_time_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct sta_info *sta = file->private_data;
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struct timespec uptime;
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struct tm result;
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long connected_time_secs;
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char buf[100];
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int res;
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do_posix_clock_monotonic_gettime(&uptime);
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connected_time_secs = uptime.tv_sec - sta->last_connected;
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time_to_tm(connected_time_secs, 0, &result);
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result.tm_year -= 70;
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result.tm_mday -= 1;
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res = scnprintf(buf, sizeof(buf),
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"years - %ld\nmonths - %d\ndays - %d\nclock - %d:%d:%d\n\n",
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result.tm_year, result.tm_mon, result.tm_mday,
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result.tm_hour, result.tm_min, result.tm_sec);
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return simple_read_from_buffer(userbuf, count, ppos, buf, res);
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}
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STA_OPS(connected_time);
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static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
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int i;
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struct sta_info *sta = file->private_data;
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for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
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p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
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le16_to_cpu(sta->last_seq_ctrl[i]));
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p += scnprintf(p, sizeof(buf)+buf-p, "\n");
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return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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}
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STA_OPS(last_seq_ctrl);
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static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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char buf[71 + STA_TID_NUM * 40], *p = buf;
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int i;
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struct sta_info *sta = file->private_data;
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struct tid_ampdu_rx *tid_rx;
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struct tid_ampdu_tx *tid_tx;
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rcu_read_lock();
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p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
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sta->ampdu_mlme.dialog_token_allocator + 1);
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p += scnprintf(p, sizeof(buf) + buf - p,
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"TID\t\tRX active\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
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for (i = 0; i < STA_TID_NUM; i++) {
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tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
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tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
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p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
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tid_rx ? tid_rx->dialog_token : 0);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
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tid_rx ? tid_rx->ssn : 0);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
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tid_tx ? tid_tx->dialog_token : 0);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
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tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
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p += scnprintf(p, sizeof(buf) + buf - p, "\n");
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}
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rcu_read_unlock();
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return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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}
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static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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char _buf[12], *buf = _buf;
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struct sta_info *sta = file->private_data;
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bool start, tx;
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unsigned long tid;
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int ret;
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if (count > sizeof(_buf))
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return -EINVAL;
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if (copy_from_user(buf, userbuf, count))
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return -EFAULT;
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buf[sizeof(_buf) - 1] = '\0';
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if (strncmp(buf, "tx ", 3) == 0) {
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buf += 3;
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tx = true;
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} else if (strncmp(buf, "rx ", 3) == 0) {
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buf += 3;
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tx = false;
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} else
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return -EINVAL;
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if (strncmp(buf, "start ", 6) == 0) {
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buf += 6;
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start = true;
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if (!tx)
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return -EINVAL;
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} else if (strncmp(buf, "stop ", 5) == 0) {
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buf += 5;
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start = false;
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} else
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return -EINVAL;
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tid = simple_strtoul(buf, NULL, 0);
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if (tid >= STA_TID_NUM)
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return -EINVAL;
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if (tx) {
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if (start)
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ret = ieee80211_start_tx_ba_session(&sta->sta, tid, 5000);
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else
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ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
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} else {
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__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
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3, true);
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ret = 0;
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}
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return ret ?: count;
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}
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STA_OPS_RW(agg_status);
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static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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#define PRINT_HT_CAP(_cond, _str) \
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do { \
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if (_cond) \
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p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
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} while (0)
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char buf[512], *p = buf;
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int i;
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struct sta_info *sta = file->private_data;
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struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
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p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
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htc->ht_supported ? "" : "not ");
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if (htc->ht_supported) {
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p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
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PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
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PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
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PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
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PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
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PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
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PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
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PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
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PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
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PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
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PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
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PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
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PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
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PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
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PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
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PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
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PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
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"3839 bytes");
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PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
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"7935 bytes");
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/*
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* For beacons and probe response this would mean the BSS
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* does or does not allow the usage of DSSS/CCK HT40.
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* Otherwise it means the STA does or does not use
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* DSSS/CCK HT40.
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*/
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PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
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PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
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/* BIT(13) is reserved */
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PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
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PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
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p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
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htc->ampdu_factor, htc->ampdu_density);
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p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
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for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
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p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
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htc->mcs.rx_mask[i]);
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p += scnprintf(p, sizeof(buf)+buf-p, "\n");
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/* If not set this is meaningless */
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if (le16_to_cpu(htc->mcs.rx_highest)) {
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p += scnprintf(p, sizeof(buf)+buf-p,
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"MCS rx highest: %d Mbps\n",
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le16_to_cpu(htc->mcs.rx_highest));
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}
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p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
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htc->mcs.tx_params);
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}
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return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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}
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STA_OPS(ht_capa);
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#define DEBUGFS_ADD(name) \
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debugfs_create_file(#name, 0400, \
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sta->debugfs.dir, sta, &sta_ ##name## _ops);
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#define DEBUGFS_ADD_COUNTER(name, field) \
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if (sizeof(sta->field) == sizeof(u32)) \
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debugfs_create_u32(#name, 0400, sta->debugfs.dir, \
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(u32 *) &sta->field); \
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else \
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debugfs_create_u64(#name, 0400, sta->debugfs.dir, \
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(u64 *) &sta->field);
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void ieee80211_sta_debugfs_add(struct sta_info *sta)
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{
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struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
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u8 mac[3*ETH_ALEN];
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sta->debugfs.add_has_run = true;
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if (!stations_dir)
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return;
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snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
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/*
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* This might fail due to a race condition:
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* When mac80211 unlinks a station, the debugfs entries
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* remain, but it is already possible to link a new
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* station with the same address which triggers adding
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* it to debugfs; therefore, if the old station isn't
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* destroyed quickly enough the old station's debugfs
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* dir might still be around.
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*/
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sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
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if (!sta->debugfs.dir)
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return;
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DEBUGFS_ADD(flags);
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DEBUGFS_ADD(num_ps_buf_frames);
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DEBUGFS_ADD(inactive_ms);
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DEBUGFS_ADD(connected_time);
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DEBUGFS_ADD(last_seq_ctrl);
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DEBUGFS_ADD(agg_status);
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DEBUGFS_ADD(dev);
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DEBUGFS_ADD(last_signal);
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DEBUGFS_ADD(ht_capa);
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DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
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DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
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DEBUGFS_ADD_COUNTER(rx_bytes, rx_bytes);
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DEBUGFS_ADD_COUNTER(tx_bytes, tx_bytes);
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DEBUGFS_ADD_COUNTER(rx_duplicates, num_duplicates);
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DEBUGFS_ADD_COUNTER(rx_fragments, rx_fragments);
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DEBUGFS_ADD_COUNTER(rx_dropped, rx_dropped);
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DEBUGFS_ADD_COUNTER(tx_fragments, tx_fragments);
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DEBUGFS_ADD_COUNTER(tx_filtered, tx_filtered_count);
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DEBUGFS_ADD_COUNTER(tx_retry_failed, tx_retry_failed);
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DEBUGFS_ADD_COUNTER(tx_retry_count, tx_retry_count);
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DEBUGFS_ADD_COUNTER(wep_weak_iv_count, wep_weak_iv_count);
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}
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void ieee80211_sta_debugfs_remove(struct sta_info *sta)
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{
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debugfs_remove_recursive(sta->debugfs.dir);
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sta->debugfs.dir = NULL;
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}
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