mac80211: enable collecting station statistics per-CPU
[cascardo/linux.git] / net / mac80211 / debugfs.c
1 /*
2  * mac80211 debugfs for wireless PHYs
3  *
4  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
5  * Copyright 2013-2014  Intel Mobile Communications GmbH
6  *
7  * GPLv2
8  *
9  */
10
11 #include <linux/debugfs.h>
12 #include <linux/rtnetlink.h>
13 #include "ieee80211_i.h"
14 #include "driver-ops.h"
15 #include "rate.h"
16 #include "debugfs.h"
17
18 #define DEBUGFS_FORMAT_BUFFER_SIZE 100
19
20 int mac80211_format_buffer(char __user *userbuf, size_t count,
21                                   loff_t *ppos, char *fmt, ...)
22 {
23         va_list args;
24         char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
25         int res;
26
27         va_start(args, fmt);
28         res = vscnprintf(buf, sizeof(buf), fmt, args);
29         va_end(args);
30
31         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
32 }
33
34 #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)                   \
35 static ssize_t name## _read(struct file *file, char __user *userbuf,    \
36                             size_t count, loff_t *ppos)                 \
37 {                                                                       \
38         struct ieee80211_local *local = file->private_data;             \
39                                                                         \
40         return mac80211_format_buffer(userbuf, count, ppos,             \
41                                       fmt "\n", ##value);               \
42 }
43
44 #define DEBUGFS_READONLY_FILE_OPS(name)                 \
45 static const struct file_operations name## _ops = {                     \
46         .read = name## _read,                                           \
47         .open = simple_open,                                            \
48         .llseek = generic_file_llseek,                                  \
49 };
50
51 #define DEBUGFS_READONLY_FILE(name, fmt, value...)              \
52         DEBUGFS_READONLY_FILE_FN(name, fmt, value)              \
53         DEBUGFS_READONLY_FILE_OPS(name)
54
55 #define DEBUGFS_ADD(name)                                               \
56         debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
57
58 #define DEBUGFS_ADD_MODE(name, mode)                                    \
59         debugfs_create_file(#name, mode, phyd, local, &name## _ops);
60
61
62 DEBUGFS_READONLY_FILE(user_power, "%d",
63                       local->user_power_level);
64 DEBUGFS_READONLY_FILE(power, "%d",
65                       local->hw.conf.power_level);
66 DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
67                       local->total_ps_buffered);
68 DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
69                       local->wep_iv & 0xffffff);
70 DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
71         local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
72
73 #ifdef CONFIG_PM
74 static ssize_t reset_write(struct file *file, const char __user *user_buf,
75                            size_t count, loff_t *ppos)
76 {
77         struct ieee80211_local *local = file->private_data;
78
79         rtnl_lock();
80         __ieee80211_suspend(&local->hw, NULL);
81         __ieee80211_resume(&local->hw);
82         rtnl_unlock();
83
84         return count;
85 }
86
87 static const struct file_operations reset_ops = {
88         .write = reset_write,
89         .open = simple_open,
90         .llseek = noop_llseek,
91 };
92 #endif
93
94 static const char *hw_flag_names[] = {
95 #define FLAG(F) [IEEE80211_HW_##F] = #F
96         FLAG(HAS_RATE_CONTROL),
97         FLAG(RX_INCLUDES_FCS),
98         FLAG(HOST_BROADCAST_PS_BUFFERING),
99         FLAG(SIGNAL_UNSPEC),
100         FLAG(SIGNAL_DBM),
101         FLAG(NEED_DTIM_BEFORE_ASSOC),
102         FLAG(SPECTRUM_MGMT),
103         FLAG(AMPDU_AGGREGATION),
104         FLAG(SUPPORTS_PS),
105         FLAG(PS_NULLFUNC_STACK),
106         FLAG(SUPPORTS_DYNAMIC_PS),
107         FLAG(MFP_CAPABLE),
108         FLAG(WANT_MONITOR_VIF),
109         FLAG(NO_AUTO_VIF),
110         FLAG(SW_CRYPTO_CONTROL),
111         FLAG(SUPPORT_FAST_XMIT),
112         FLAG(REPORTS_TX_ACK_STATUS),
113         FLAG(CONNECTION_MONITOR),
114         FLAG(QUEUE_CONTROL),
115         FLAG(SUPPORTS_PER_STA_GTK),
116         FLAG(AP_LINK_PS),
117         FLAG(TX_AMPDU_SETUP_IN_HW),
118         FLAG(SUPPORTS_RC_TABLE),
119         FLAG(P2P_DEV_ADDR_FOR_INTF),
120         FLAG(TIMING_BEACON_ONLY),
121         FLAG(SUPPORTS_HT_CCK_RATES),
122         FLAG(CHANCTX_STA_CSA),
123         FLAG(SUPPORTS_CLONED_SKBS),
124         FLAG(SINGLE_SCAN_ON_ALL_BANDS),
125         FLAG(TDLS_WIDER_BW),
126         FLAG(SUPPORTS_AMSDU_IN_AMPDU),
127         FLAG(BEACON_TX_STATUS),
128         FLAG(NEEDS_UNIQUE_STA_ADDR),
129         FLAG(SUPPORTS_REORDERING_BUFFER),
130         FLAG(USES_RSS),
131 #undef FLAG
132 };
133
134 static ssize_t hwflags_read(struct file *file, char __user *user_buf,
135                             size_t count, loff_t *ppos)
136 {
137         struct ieee80211_local *local = file->private_data;
138         size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
139         char *buf = kzalloc(bufsz, GFP_KERNEL);
140         char *pos = buf, *end = buf + bufsz - 1;
141         ssize_t rv;
142         int i;
143
144         if (!buf)
145                 return -ENOMEM;
146
147         /* fail compilation if somebody adds or removes
148          * a flag without updating the name array above
149          */
150         BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);
151
152         for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
153                 if (test_bit(i, local->hw.flags))
154                         pos += scnprintf(pos, end - pos, "%s\n",
155                                          hw_flag_names[i]);
156         }
157
158         rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
159         kfree(buf);
160         return rv;
161 }
162
163 static ssize_t queues_read(struct file *file, char __user *user_buf,
164                            size_t count, loff_t *ppos)
165 {
166         struct ieee80211_local *local = file->private_data;
167         unsigned long flags;
168         char buf[IEEE80211_MAX_QUEUES * 20];
169         int q, res = 0;
170
171         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
172         for (q = 0; q < local->hw.queues; q++)
173                 res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
174                                 local->queue_stop_reasons[q],
175                                 skb_queue_len(&local->pending[q]));
176         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
177
178         return simple_read_from_buffer(user_buf, count, ppos, buf, res);
179 }
180
181 DEBUGFS_READONLY_FILE_OPS(hwflags);
182 DEBUGFS_READONLY_FILE_OPS(queues);
183
184 /* statistics stuff */
185
186 static ssize_t format_devstat_counter(struct ieee80211_local *local,
187         char __user *userbuf,
188         size_t count, loff_t *ppos,
189         int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
190                           int buflen))
191 {
192         struct ieee80211_low_level_stats stats;
193         char buf[20];
194         int res;
195
196         rtnl_lock();
197         res = drv_get_stats(local, &stats);
198         rtnl_unlock();
199         if (res)
200                 return res;
201         res = printvalue(&stats, buf, sizeof(buf));
202         return simple_read_from_buffer(userbuf, count, ppos, buf, res);
203 }
204
205 #define DEBUGFS_DEVSTATS_FILE(name)                                     \
206 static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
207                                  char *buf, int buflen)                 \
208 {                                                                       \
209         return scnprintf(buf, buflen, "%u\n", stats->name);             \
210 }                                                                       \
211 static ssize_t stats_ ##name## _read(struct file *file,                 \
212                                      char __user *userbuf,              \
213                                      size_t count, loff_t *ppos)        \
214 {                                                                       \
215         return format_devstat_counter(file->private_data,               \
216                                       userbuf,                          \
217                                       count,                            \
218                                       ppos,                             \
219                                       print_devstats_##name);           \
220 }                                                                       \
221                                                                         \
222 static const struct file_operations stats_ ##name## _ops = {            \
223         .read = stats_ ##name## _read,                                  \
224         .open = simple_open,                                            \
225         .llseek = generic_file_llseek,                                  \
226 };
227
228 #define DEBUGFS_STATS_ADD(name)                                 \
229         debugfs_create_u32(#name, 0400, statsd, &local->name);
230 #define DEBUGFS_DEVSTATS_ADD(name)                                      \
231         debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
232
233 DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
234 DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
235 DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
236 DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
237
238 void debugfs_hw_add(struct ieee80211_local *local)
239 {
240         struct dentry *phyd = local->hw.wiphy->debugfsdir;
241         struct dentry *statsd;
242
243         if (!phyd)
244                 return;
245
246         local->debugfs.keys = debugfs_create_dir("keys", phyd);
247
248         DEBUGFS_ADD(total_ps_buffered);
249         DEBUGFS_ADD(wep_iv);
250         DEBUGFS_ADD(queues);
251 #ifdef CONFIG_PM
252         DEBUGFS_ADD_MODE(reset, 0200);
253 #endif
254         DEBUGFS_ADD(hwflags);
255         DEBUGFS_ADD(user_power);
256         DEBUGFS_ADD(power);
257
258         statsd = debugfs_create_dir("statistics", phyd);
259
260         /* if the dir failed, don't put all the other things into the root! */
261         if (!statsd)
262                 return;
263
264 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
265         DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
266         DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
267         DEBUGFS_STATS_ADD(dot11FailedCount);
268         DEBUGFS_STATS_ADD(dot11RetryCount);
269         DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
270         DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
271         DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
272         DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
273         DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
274         DEBUGFS_STATS_ADD(tx_handlers_drop);
275         DEBUGFS_STATS_ADD(tx_handlers_queued);
276         DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
277         DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
278         DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
279         DEBUGFS_STATS_ADD(rx_handlers_drop);
280         DEBUGFS_STATS_ADD(rx_handlers_queued);
281         DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
282         DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
283         DEBUGFS_STATS_ADD(tx_expand_skb_head);
284         DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
285         DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
286         DEBUGFS_STATS_ADD(rx_handlers_fragments);
287         DEBUGFS_STATS_ADD(tx_status_drop);
288 #endif
289         DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
290         DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
291         DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
292         DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
293 }