![Johannes Berg](/assets/img/avatar_default.png)
When the driver sets the SUPPORTS_REORDERING_BUFFER hardware flag, the debugfs data for RX aggregation sessions won't even indicate that a session is open. Since the previous fix to store the dialog token separately, we can indicate that it's open and add the token so that there's at least some data (ssn is not available.) Signed-off-by: Johannes Berg <johannes.berg@intel.com>
555 lines
16 KiB
C
555 lines
16 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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* Copyright 2013-2014 Intel Mobile Communications GmbH
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* Copyright(c) 2016 Intel Deutschland GmbH
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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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#include "driver-ops.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_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 = simple_open, \
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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 = simple_open, \
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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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static const char * const sta_flag_names[] = {
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#define FLAG(F) [WLAN_STA_##F] = #F
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FLAG(AUTH),
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FLAG(ASSOC),
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FLAG(PS_STA),
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FLAG(AUTHORIZED),
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FLAG(SHORT_PREAMBLE),
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FLAG(WDS),
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FLAG(CLEAR_PS_FILT),
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FLAG(MFP),
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FLAG(BLOCK_BA),
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FLAG(PS_DRIVER),
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FLAG(PSPOLL),
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FLAG(TDLS_PEER),
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FLAG(TDLS_PEER_AUTH),
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FLAG(TDLS_INITIATOR),
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FLAG(TDLS_CHAN_SWITCH),
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FLAG(TDLS_OFF_CHANNEL),
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FLAG(TDLS_WIDER_BW),
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FLAG(UAPSD),
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FLAG(SP),
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FLAG(4ADDR_EVENT),
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FLAG(INSERTED),
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FLAG(RATE_CONTROL),
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FLAG(TOFFSET_KNOWN),
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FLAG(MPSP_OWNER),
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FLAG(MPSP_RECIPIENT),
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FLAG(PS_DELIVER),
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#undef FLAG
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};
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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[16 * NUM_WLAN_STA_FLAGS], *pos = buf;
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char *end = buf + sizeof(buf) - 1;
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struct sta_info *sta = file->private_data;
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unsigned int flg;
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BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS);
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for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) {
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if (test_sta_flag(sta, flg))
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pos += scnprintf(pos, end - pos, "%s\n",
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sta_flag_names[flg]);
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}
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return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
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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_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*IEEE80211_NUM_TIDS], *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 < IEEE80211_NUM_TIDS; 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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#define AQM_TXQ_ENTRY_LEN 130
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static ssize_t sta_aqm_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 ieee80211_local *local = sta->local;
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size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
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char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
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struct txq_info *txqi;
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ssize_t rv;
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int i;
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if (!buf)
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return -ENOMEM;
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spin_lock_bh(&local->fq.lock);
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rcu_read_lock();
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p += scnprintf(p,
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bufsz+buf-p,
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"tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
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for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
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txqi = to_txq_info(sta->sta.txq[i]);
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p += scnprintf(p, bufsz+buf-p,
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"%d %d %u %u %u %u %u %u %u %u %u\n",
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txqi->txq.tid,
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txqi->txq.ac,
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txqi->tin.backlog_bytes,
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txqi->tin.backlog_packets,
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txqi->tin.flows,
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txqi->cstats.drop_count,
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txqi->cstats.ecn_mark,
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txqi->tin.overlimit,
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txqi->tin.collisions,
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txqi->tin.tx_bytes,
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txqi->tin.tx_packets);
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}
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rcu_read_unlock();
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spin_unlock_bh(&local->fq.lock);
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rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
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kfree(buf);
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return rv;
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}
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STA_OPS(aqm);
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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 + IEEE80211_NUM_TIDS * 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\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
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for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
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bool tid_rx_valid;
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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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tid_rx_valid = test_bit(i, sta->ampdu_mlme.agg_session_valid);
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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",
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tid_rx_valid);
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p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
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tid_rx_valid ?
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sta->ampdu_mlme.tid_rx_token[i] : 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[25] = {}, *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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char *pos;
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int ret, timeout = 5000;
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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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pos = buf;
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buf = strsep(&pos, " ");
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if (!buf)
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return -EINVAL;
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if (!strcmp(buf, "tx"))
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tx = true;
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else if (!strcmp(buf, "rx"))
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tx = false;
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else
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return -EINVAL;
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buf = strsep(&pos, " ");
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if (!buf)
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return -EINVAL;
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if (!strcmp(buf, "start")) {
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start = true;
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if (!tx)
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return -EINVAL;
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} else if (!strcmp(buf, "stop")) {
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start = false;
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} else {
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return -EINVAL;
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}
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buf = strsep(&pos, " ");
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if (!buf)
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return -EINVAL;
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if (sscanf(buf, "timeout=%d", &timeout) == 1) {
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buf = strsep(&pos, " ");
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if (!buf || !tx || !start)
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return -EINVAL;
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}
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ret = kstrtoul(buf, 0, &tid);
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if (ret || tid >= IEEE80211_NUM_TIDS)
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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,
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timeout);
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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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static ssize_t sta_vht_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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char buf[512], *p = buf;
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struct sta_info *sta = file->private_data;
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struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
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p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
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vhtc->vht_supported ? "" : "not ");
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if (vhtc->vht_supported) {
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p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
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vhtc->cap);
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#define PFLAG(a, b) \
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do { \
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if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
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p += scnprintf(p, sizeof(buf) + buf - p, \
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"\t\t%s\n", b); \
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} while (0)
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switch (vhtc->cap & 0x3) {
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\tMAX-MPDU-3895\n");
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break;
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\tMAX-MPDU-7991\n");
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break;
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\tMAX-MPDU-11454\n");
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break;
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default:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\tMAX-MPDU-UNKNOWN\n");
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};
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switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
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case 0:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\t80Mhz\n");
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break;
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case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\t160Mhz\n");
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break;
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case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\t80+80Mhz\n");
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break;
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default:
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\t\tUNKNOWN-MHZ: 0x%x\n",
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(vhtc->cap >> 2) & 0x3);
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};
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PFLAG(RXLDPC, "RXLDPC");
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PFLAG(SHORT_GI_80, "SHORT-GI-80");
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PFLAG(SHORT_GI_160, "SHORT-GI-160");
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PFLAG(TXSTBC, "TXSTBC");
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p += scnprintf(p, sizeof(buf) + buf - p,
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"\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(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;
|
|
}
|