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tipc: Prevent access of non-existent field in short message header
[linux-2.6/kvm.git] / net / mac80211 / debugfs_sta.c
bloba2cc0284c9d087203ca88925ad9570c080f91b58
1 /*
2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 *
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.
9 */
10
11 #include <linux/debugfs.h>
12 #include <linux/ieee80211.h>
13 #include "ieee80211_i.h"
14 #include "debugfs.h"
15 #include "debugfs_sta.h"
16 #include "sta_info.h"
17
18 /* sta attributtes */
19
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) \
24 { \
25 int res; \
26 struct sta_info *sta = file->private_data; \
27 char buf[buflen]; \
28 res = scnprintf(buf, buflen, format_string, sta->field); \
29 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
30 }
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")
35
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, \
40 }
41
42 #define STA_OPS_WR(name) \
43 static const struct file_operations sta_ ##name## _ops = { \
44 .read = sta_##name##_read, \
45 .write = sta_##name##_write, \
46 .open = mac80211_open_file_generic, \
47 }
48
49 #define STA_FILE(name, field, format) \
50 STA_READ_##format(name, field) \
51 STA_OPS(name)
52
53 STA_FILE(aid, aid, D);
54 STA_FILE(dev, sdata->dev->name, S);
55 STA_FILE(rx_packets, rx_packets, LU);
56 STA_FILE(tx_packets, tx_packets, LU);
57 STA_FILE(rx_bytes, rx_bytes, LU);
58 STA_FILE(tx_bytes, tx_bytes, LU);
59 STA_FILE(rx_duplicates, num_duplicates, LU);
60 STA_FILE(rx_fragments, rx_fragments, LU);
61 STA_FILE(rx_dropped, rx_dropped, LU);
62 STA_FILE(tx_fragments, tx_fragments, LU);
63 STA_FILE(tx_filtered, tx_filtered_count, LU);
64 STA_FILE(tx_retry_failed, tx_retry_failed, LU);
65 STA_FILE(tx_retry_count, tx_retry_count, LU);
66 STA_FILE(last_signal, last_signal, D);
67 STA_FILE(last_qual, last_qual, D);
68 STA_FILE(last_noise, last_noise, D);
69 STA_FILE(channel_use, channel_use, D);
70 STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
71
72 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
73 size_t count, loff_t *ppos)
74 {
75 char buf[100];
76 struct sta_info *sta = file->private_data;
77 u32 staflags = get_sta_flags(sta);
78 int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
79 staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
80 staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
81 staflags & WLAN_STA_PS ? "PS\n" : "",
82 staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
83 staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
84 staflags & WLAN_STA_WME ? "WME\n" : "",
85 staflags & WLAN_STA_WDS ? "WDS\n" : "");
86 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
87 }
88 STA_OPS(flags);
89
90 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
91 char __user *userbuf,
92 size_t count, loff_t *ppos)
93 {
94 char buf[20];
95 struct sta_info *sta = file->private_data;
96 int res = scnprintf(buf, sizeof(buf), "%u\n",
97 skb_queue_len(&sta->ps_tx_buf));
98 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
99 }
100 STA_OPS(num_ps_buf_frames);
101
102 static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
103 size_t count, loff_t *ppos)
104 {
105 char buf[20];
106 struct sta_info *sta = file->private_data;
107 int res = scnprintf(buf, sizeof(buf), "%d\n",
108 jiffies_to_msecs(jiffies - sta->last_rx));
109 return simple_read_from_buffer(userbuf, count, ppos, buf, res);
110 }
111 STA_OPS(inactive_ms);
112
113 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
114 size_t count, loff_t *ppos)
115 {
116 char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
117 int i;
118 struct sta_info *sta = file->private_data;
119 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
120 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
121 le16_to_cpu(sta->last_seq_ctrl[i]));
122 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
123 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
124 }
125 STA_OPS(last_seq_ctrl);
126
127 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
128 size_t count, loff_t *ppos)
129 {
130 char buf[768], *p = buf;
131 int i;
132 struct sta_info *sta = file->private_data;
133 p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
134 p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
135 "TIDs info is: \n TID :",
136 (sta->ampdu_mlme.dialog_token_allocator + 1));
137 for (i = 0; i < STA_TID_NUM; i++)
138 p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
139
140 p += scnprintf(p, sizeof(buf)+buf-p, "\n RX :");
141 for (i = 0; i < STA_TID_NUM; i++)
142 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
143 sta->ampdu_mlme.tid_state_rx[i]);
144
145 p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
146 for (i = 0; i < STA_TID_NUM; i++)
147 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
148 sta->ampdu_mlme.tid_state_rx[i]?
149 sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
150
151 p += scnprintf(p, sizeof(buf)+buf-p, "\n TX :");
152 for (i = 0; i < STA_TID_NUM; i++)
153 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
154 sta->ampdu_mlme.tid_state_tx[i]);
155
156 p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
157 for (i = 0; i < STA_TID_NUM; i++)
158 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
159 sta->ampdu_mlme.tid_state_tx[i]?
160 sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
161
162 p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
163 for (i = 0; i < STA_TID_NUM; i++)
164 p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
165 sta->ampdu_mlme.tid_state_tx[i]?
166 sta->ampdu_mlme.tid_tx[i]->ssn : 0);
167
168 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
169
170 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
171 }
172
173 static ssize_t sta_agg_status_write(struct file *file,
174 const char __user *user_buf, size_t count, loff_t *ppos)
175 {
176 struct sta_info *sta = file->private_data;
177 struct net_device *dev = sta->sdata->dev;
178 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
179 struct ieee80211_hw *hw = &local->hw;
180 u8 *da = sta->addr;
181 static int tid_static_tx[16] = {0, 0, 0, 0, 0, 0, 0, 0,
182 0, 0, 0, 0, 0, 0, 0, 0};
183 static int tid_static_rx[16] = {1, 1, 1, 1, 1, 1, 1, 1,
184 1, 1, 1, 1, 1, 1, 1, 1};
185 char *endp;
186 char buf[32];
187 int buf_size, rs;
188 unsigned int tid_num;
189 char state[4];
190
191 memset(buf, 0x00, sizeof(buf));
192 buf_size = min(count, (sizeof(buf)-1));
193 if (copy_from_user(buf, user_buf, buf_size))
194 return -EFAULT;
195
196 tid_num = simple_strtoul(buf, &endp, 0);
197 if (endp == buf)
198 return -EINVAL;
199
200 if ((tid_num >= 100) && (tid_num <= 115)) {
201 /* toggle Rx aggregation command */
202 tid_num = tid_num - 100;
203 if (tid_static_rx[tid_num] == 1) {
204 strcpy(state, "off ");
205 ieee80211_sta_stop_rx_ba_session(dev, da, tid_num, 0,
206 WLAN_REASON_QSTA_REQUIRE_SETUP);
207 sta->ampdu_mlme.tid_state_rx[tid_num] |=
208 HT_AGG_STATE_DEBUGFS_CTL;
209 tid_static_rx[tid_num] = 0;
210 } else {
211 strcpy(state, "on ");
212 sta->ampdu_mlme.tid_state_rx[tid_num] &=
213 ~HT_AGG_STATE_DEBUGFS_CTL;
214 tid_static_rx[tid_num] = 1;
215 }
216 printk(KERN_DEBUG "debugfs - try switching tid %u %s\n",
217 tid_num, state);
218 } else if ((tid_num >= 0) && (tid_num <= 15)) {
219 /* toggle Tx aggregation command */
220 if (tid_static_tx[tid_num] == 0) {
221 strcpy(state, "on ");
222 rs = ieee80211_start_tx_ba_session(hw, da, tid_num);
223 if (rs == 0)
224 tid_static_tx[tid_num] = 1;
225 } else {
226 strcpy(state, "off");
227 rs = ieee80211_stop_tx_ba_session(hw, da, tid_num, 1);
228 if (rs == 0)
229 tid_static_tx[tid_num] = 0;
230 }
231 printk(KERN_DEBUG "debugfs - switching tid %u %s, return=%d\n",
232 tid_num, state, rs);
233 }
234
235 return count;
236 }
237 STA_OPS_WR(agg_status);
238
239 #define DEBUGFS_ADD(name) \
240 sta->debugfs.name = debugfs_create_file(#name, 0400, \
241 sta->debugfs.dir, sta, &sta_ ##name## _ops);
242
243 #define DEBUGFS_DEL(name) \
244 debugfs_remove(sta->debugfs.name);\
245 sta->debugfs.name = NULL;
246
247
248 void ieee80211_sta_debugfs_add(struct sta_info *sta)
249 {
250 struct dentry *stations_dir = sta->local->debugfs.stations;
251 DECLARE_MAC_BUF(mbuf);
252 u8 *mac;
253
254 if (!stations_dir)
255 return;
256
257 mac = print_mac(mbuf, sta->addr);
258
259 sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
260 if (!sta->debugfs.dir)
261 return;
262
263 DEBUGFS_ADD(flags);
264 DEBUGFS_ADD(num_ps_buf_frames);
265 DEBUGFS_ADD(inactive_ms);
266 DEBUGFS_ADD(last_seq_ctrl);
267 DEBUGFS_ADD(agg_status);
268 }
269
270 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
271 {
272 DEBUGFS_DEL(flags);
273 DEBUGFS_DEL(num_ps_buf_frames);
274 DEBUGFS_DEL(inactive_ms);
275 DEBUGFS_DEL(last_seq_ctrl);
276 DEBUGFS_DEL(agg_status);
277
278 debugfs_remove(sta->debugfs.dir);
279 sta->debugfs.dir = NULL;
280 }
kernel-based virtual machine