2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/debugfs.h>
12 #include <linux/ieee80211.h>
13 #include "ieee80211_i.h"
15 #include "debugfs_sta.h"
20 #define STA_READ(name, buflen, field, format_string) \
21 static ssize_t sta_ ##name## _read(struct file *file, \
22 char __user *userbuf, \
23 size_t count, loff_t *ppos) \
26 struct sta_info *sta = file->private_data; \
28 res = scnprintf(buf, buflen, format_string, sta->field); \
29 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
31 #define STA_READ_D(name, field) STA_READ(name, 20, field, "%d\n")
32 #define STA_READ_U(name, field) STA_READ(name, 20, field, "%u\n")
33 #define STA_READ_LU(name, field) STA_READ(name, 20, field, "%lu\n")
34 #define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n")
36 #define STA_OPS(name) \
37 static const struct file_operations sta_ ##name## _ops = { \
38 .read = sta_##name##_read, \
39 .open = mac80211_open_file_generic, \
42 #define STA_FILE(name, field, format) \
43 STA_READ_##format(name, field) \
46 STA_FILE(aid, sta.aid, D);
47 STA_FILE(dev, sdata->dev->name, S);
48 STA_FILE(rx_packets, rx_packets, LU);
49 STA_FILE(tx_packets, tx_packets, LU);
50 STA_FILE(rx_bytes, rx_bytes, LU);
51 STA_FILE(tx_bytes, tx_bytes, LU);
52 STA_FILE(rx_duplicates, num_duplicates, LU);
53 STA_FILE(rx_fragments, rx_fragments, LU);
54 STA_FILE(rx_dropped, rx_dropped, LU);
55 STA_FILE(tx_fragments, tx_fragments, LU);
56 STA_FILE(tx_filtered, tx_filtered_count, LU);
57 STA_FILE(tx_retry_failed, tx_retry_failed, LU);
58 STA_FILE(tx_retry_count, tx_retry_count, LU);
59 STA_FILE(last_signal, last_signal, D);
60 STA_FILE(last_qual, last_qual, D);
61 STA_FILE(last_noise, last_noise, D);
62 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
64 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
65 size_t count, loff_t *ppos)
68 struct sta_info *sta = file->private_data;
69 u32 staflags = get_sta_flags(sta);
70 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
71 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
72 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
73 staflags & WLAN_STA_PS ? "PS\n" : "",
74 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
75 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
76 staflags & WLAN_STA_WME ? "WME\n" : "",
77 staflags & WLAN_STA_WDS ? "WDS\n" : "");
78 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
82 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
84 size_t count, loff_t *ppos)
87 struct sta_info *sta = file->private_data;
88 int res = scnprintf(buf, sizeof(buf), "%u\n",
89 skb_queue_len(&sta->ps_tx_buf));
90 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
92 STA_OPS(num_ps_buf_frames);
94 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
95 size_t count, loff_t *ppos)
98 struct sta_info *sta = file->private_data;
99 int res = scnprintf(buf, sizeof(buf), "%d\n",
100 jiffies_to_msecs(jiffies - sta->last_rx));
101 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
103 STA_OPS(inactive_ms);
105 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
106 size_t count, loff_t *ppos)
108 char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
110 struct sta_info *sta = file->private_data;
111 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
112 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
113 le16_to_cpu(sta->last_seq_ctrl[i]));
114 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
115 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
117 STA_OPS(last_seq_ctrl);
119 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
120 size_t count, loff_t *ppos)
122 char buf[768], *p = buf;
124 struct sta_info *sta = file->private_data;
125 p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
126 p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
127 "TIDs info is: \n TID :",
128 (sta->ampdu_mlme.dialog_token_allocator + 1));
129 for (i = 0; i < STA_TID_NUM; i++)
130 p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
132 p += scnprintf(p, sizeof(buf)+buf-p, "\n RX :");
133 for (i = 0; i < STA_TID_NUM; i++)
134 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
135 sta->ampdu_mlme.tid_state_rx[i]);
137 p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
138 for (i = 0; i < STA_TID_NUM; i++)
139 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
140 sta->ampdu_mlme.tid_state_rx[i] ?
141 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
143 p += scnprintf(p, sizeof(buf)+buf-p, "\n TX :");
144 for (i = 0; i < STA_TID_NUM; i++)
145 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
146 sta->ampdu_mlme.tid_state_tx[i]);
148 p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
149 for (i = 0; i < STA_TID_NUM; i++)
150 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
151 sta->ampdu_mlme.tid_state_tx[i] ?
152 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
154 p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
155 for (i = 0; i < STA_TID_NUM; i++)
156 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
157 sta->ampdu_mlme.tid_state_tx[i] ?
158 sta->ampdu_mlme.tid_tx[i]->ssn : 0);
160 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
162 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
166 #define DEBUGFS_ADD(name) \
167 sta->debugfs.name = debugfs_create_file(#name, 0400, \
168 sta->debugfs.dir, sta, &sta_ ##name## _ops);
170 #define DEBUGFS_DEL(name) \
171 debugfs_remove(sta->debugfs.name);\
172 sta->debugfs.name = NULL;
175 void ieee80211_sta_debugfs_add(struct sta_info *sta)
177 struct dentry *stations_dir = sta->local->debugfs.stations;
180 sta->debugfs.add_has_run = true;
185 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
188 * This might fail due to a race condition:
189 * When mac80211 unlinks a station, the debugfs entries
190 * remain, but it is already possible to link a new
191 * station with the same address which triggers adding
192 * it to debugfs; therefore, if the old station isn't
193 * destroyed quickly enough the old station's debugfs
194 * dir might still be around.
196 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
197 if (!sta->debugfs.dir)
201 DEBUGFS_ADD(num_ps_buf_frames);
202 DEBUGFS_ADD(inactive_ms);
203 DEBUGFS_ADD(last_seq_ctrl);
204 DEBUGFS_ADD(agg_status);
207 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
210 DEBUGFS_DEL(num_ps_buf_frames);
211 DEBUGFS_DEL(inactive_ms);
212 DEBUGFS_DEL(last_seq_ctrl);
213 DEBUGFS_DEL(agg_status);
215 debugfs_remove(sta->debugfs.dir);
216 sta->debugfs.dir = NULL;