summaryrefslogtreecommitdiffstats
path: root/net/mac80211/debugfs.c
blob: f62cd0e13c58315337726f6795ecf08822f26e89 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
/*
 * mac80211 debugfs for wireless PHYs
 *
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 *
 * GPLv2
 *
 */

#include <linux/debugfs.h>
#include <linux/rtnetlink.h>
#include <linux/vmalloc.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "debugfs.h"

#define DEBUGFS_FORMAT_BUFFER_SIZE 100

int mac80211_format_buffer(char __user *userbuf, size_t count,
				  loff_t *ppos, char *fmt, ...)
{
	va_list args;
	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
	int res;

	va_start(args, fmt);
	res = vscnprintf(buf, sizeof(buf), fmt, args);
	va_end(args);

	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}

#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)			\
static ssize_t name## _read(struct file *file, char __user *userbuf,	\
			    size_t count, loff_t *ppos)			\
{									\
	struct ieee80211_local *local = file->private_data;		\
									\
	return mac80211_format_buffer(userbuf, count, ppos, 		\
				      fmt "\n", ##value);		\
}

#define DEBUGFS_READONLY_FILE_OPS(name)			\
static const struct file_operations name## _ops = {			\
	.read = name## _read,						\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
};

#define DEBUGFS_READONLY_FILE(name, fmt, value...)		\
	DEBUGFS_READONLY_FILE_FN(name, fmt, value)		\
	DEBUGFS_READONLY_FILE_OPS(name)

#define DEBUGFS_ADD(name)						\
	debugfs_create_file(#name, 0400, phyd, local, &name## _ops);

#define DEBUGFS_ADD_MODE(name, mode)					\
	debugfs_create_file(#name, mode, phyd, local, &name## _ops);


DEBUGFS_READONLY_FILE(user_power, "%d",
		      local->user_power_level);
DEBUGFS_READONLY_FILE(power, "%d",
		      local->hw.conf.power_level);
DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
		      local->total_ps_buffered);
DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
		      local->wep_iv & 0xffffff);
DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");

static ssize_t aqm_read(struct file *file,
			char __user *user_buf,
			size_t count,
			loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	struct fq *fq = &local->fq;
	char buf[200];
	int len = 0;

	spin_lock_bh(&local->fq.lock);
	rcu_read_lock();

	len = scnprintf(buf, sizeof(buf),
			"access name value\n"
			"R fq_flows_cnt %u\n"
			"R fq_backlog %u\n"
			"R fq_overlimit %u\n"
			"R fq_overmemory %u\n"
			"R fq_collisions %u\n"
			"R fq_memory_usage %u\n"
			"RW fq_memory_limit %u\n"
			"RW fq_limit %u\n"
			"RW fq_quantum %u\n",
			fq->flows_cnt,
			fq->backlog,
			fq->overmemory,
			fq->overlimit,
			fq->collisions,
			fq->memory_usage,
			fq->memory_limit,
			fq->limit,
			fq->quantum);

	rcu_read_unlock();
	spin_unlock_bh(&local->fq.lock);

	return simple_read_from_buffer(user_buf, count, ppos,
				       buf, len);
}

static ssize_t aqm_write(struct file *file,
			 const char __user *user_buf,
			 size_t count,
			 loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	char buf[100];
	size_t len;

	if (count > sizeof(buf))
		return -EINVAL;

	if (copy_from_user(buf, user_buf, count))
		return -EFAULT;

	buf[sizeof(buf) - 1] = '\0';
	len = strlen(buf);
	if (len > 0 && buf[len-1] == '\n')
		buf[len-1] = 0;

	if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)
		return count;
	else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)
		return count;
	else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)
		return count;

	return -EINVAL;
}

static const struct file_operations aqm_ops = {
	.write = aqm_write,
	.read = aqm_read,
	.open = simple_open,
	.llseek = default_llseek,
};

#ifdef CONFIG_PM
static ssize_t reset_write(struct file *file, const char __user *user_buf,
			   size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;

	rtnl_lock();
	__ieee80211_suspend(&local->hw, NULL);
	__ieee80211_resume(&local->hw);
	rtnl_unlock();

	return count;
}

static const struct file_operations reset_ops = {
	.write = reset_write,
	.open = simple_open,
	.llseek = noop_llseek,
};
#endif

static const char *hw_flag_names[] = {
#define FLAG(F)	[IEEE80211_HW_##F] = #F
	FLAG(HAS_RATE_CONTROL),
	FLAG(RX_INCLUDES_FCS),
	FLAG(HOST_BROADCAST_PS_BUFFERING),
	FLAG(SIGNAL_UNSPEC),
	FLAG(SIGNAL_DBM),
	FLAG(NEED_DTIM_BEFORE_ASSOC),
	FLAG(SPECTRUM_MGMT),
	FLAG(AMPDU_AGGREGATION),
	FLAG(SUPPORTS_PS),
	FLAG(PS_NULLFUNC_STACK),
	FLAG(SUPPORTS_DYNAMIC_PS),
	FLAG(MFP_CAPABLE),
	FLAG(WANT_MONITOR_VIF),
	FLAG(NO_AUTO_VIF),
	FLAG(SW_CRYPTO_CONTROL),
	FLAG(SUPPORT_FAST_XMIT),
	FLAG(REPORTS_TX_ACK_STATUS),
	FLAG(CONNECTION_MONITOR),
	FLAG(QUEUE_CONTROL),
	FLAG(SUPPORTS_PER_STA_GTK),
	FLAG(AP_LINK_PS),
	FLAG(TX_AMPDU_SETUP_IN_HW),
	FLAG(SUPPORTS_RC_TABLE),
	FLAG(P2P_DEV_ADDR_FOR_INTF),
	FLAG(TIMING_BEACON_ONLY),
	FLAG(SUPPORTS_HT_CCK_RATES),
	FLAG(CHANCTX_STA_CSA),
	FLAG(SUPPORTS_CLONED_SKBS),
	FLAG(SINGLE_SCAN_ON_ALL_BANDS),
	FLAG(TDLS_WIDER_BW),
	FLAG(SUPPORTS_AMSDU_IN_AMPDU),
	FLAG(BEACON_TX_STATUS),
	FLAG(NEEDS_UNIQUE_STA_ADDR),
	FLAG(SUPPORTS_REORDERING_BUFFER),
	FLAG(USES_RSS),
	FLAG(TX_AMSDU),
	FLAG(TX_FRAG_LIST),
	FLAG(REPORTS_LOW_ACK),
	FLAG(SUPPORTS_TX_FRAG),
#undef FLAG
};

static ssize_t hwflags_read(struct file *file, char __user *user_buf,
			    size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;
	char *buf = kzalloc(bufsz, GFP_KERNEL);
	char *pos = buf, *end = buf + bufsz - 1;
	ssize_t rv;
	int i;

	if (!buf)
		return -ENOMEM;

	/* fail compilation if somebody adds or removes
	 * a flag without updating the name array above
	 */
	BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS);

	for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {
		if (test_bit(i, local->hw.flags))
			pos += scnprintf(pos, end - pos, "%s\n",
					 hw_flag_names[i]);
	}

	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
	kfree(buf);
	return rv;
}

static ssize_t misc_read(struct file *file, char __user *user_buf,
			 size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	/* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
	size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
	char *buf = kzalloc(bufsz, GFP_KERNEL);
	char *pos = buf, *end = buf + bufsz - 1;
	ssize_t rv;
	int i;
	int ln;

	pos += scnprintf(pos, end - pos, "pending:\n");

	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
		ln = skb_queue_len(&local->pending[i]);
		pos += scnprintf(pos, end - pos, "[%i] %d\n",
				 i, ln);
	}

	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
	kfree(buf);
	return rv;
}

static ssize_t queues_read(struct file *file, char __user *user_buf,
			   size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	unsigned long flags;
	char buf[IEEE80211_MAX_QUEUES * 20];
	int q, res = 0;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	for (q = 0; q < local->hw.queues; q++)
		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
				local->queue_stop_reasons[q],
				skb_queue_len(&local->pending[q]));
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);

	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
}

DEBUGFS_READONLY_FILE_OPS(hwflags);
DEBUGFS_READONLY_FILE_OPS(queues);
DEBUGFS_READONLY_FILE_OPS(misc);

/* statistics stuff */

static ssize_t format_devstat_counter(struct ieee80211_local *local,
	char __user *userbuf,
	size_t count, loff_t *ppos,
	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
			  int buflen))
{
	struct ieee80211_low_level_stats stats;
	char buf[20];
	int res;

	rtnl_lock();
	res = drv_get_stats(local, &stats);
	rtnl_unlock();
	if (res)
		return res;
	res = printvalue(&stats, buf, sizeof(buf));
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}

#define DEBUGFS_DEVSTATS_FILE(name)					\
static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
				 char *buf, int buflen)			\
{									\
	return scnprintf(buf, buflen, "%u\n", stats->name);		\
}									\
static ssize_t stats_ ##name## _read(struct file *file,			\
				     char __user *userbuf,		\
				     size_t count, loff_t *ppos)	\
{									\
	return format_devstat_counter(file->private_data,		\
				      userbuf,				\
				      count,				\
				      ppos,				\
				      print_devstats_##name);		\
}									\
									\
static const struct file_operations stats_ ##name## _ops = {		\
	.read = stats_ ##name## _read,					\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
};

#define DEBUGFS_STATS_ADD(name)					\
	debugfs_create_u32(#name, 0400, statsd, &local->name);
#define DEBUGFS_DEVSTATS_ADD(name)					\
	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);

DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);

void debugfs_hw_add(struct ieee80211_local *local)
{
	struct dentry *phyd = local->hw.wiphy->debugfsdir;
	struct dentry *statsd;

	if (!phyd)
		return;

	local->debugfs.keys = debugfs_create_dir("keys", phyd);

	DEBUGFS_ADD(total_ps_buffered);
	DEBUGFS_ADD(wep_iv);
	DEBUGFS_ADD(queues);
	DEBUGFS_ADD(misc);
#ifdef CONFIG_PM
	DEBUGFS_ADD_MODE(reset, 0200);
#endif
	DEBUGFS_ADD(hwflags);
	DEBUGFS_ADD(user_power);
	DEBUGFS_ADD(power);

	if (local->ops->wake_tx_queue)
		DEBUGFS_ADD_MODE(aqm, 0600);

	statsd = debugfs_create_dir("statistics", phyd);

	/* if the dir failed, don't put all the other things into the root! */
	if (!statsd)
		return;

#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
	DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount);
	DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount);
	DEBUGFS_STATS_ADD(dot11FailedCount);
	DEBUGFS_STATS_ADD(dot11RetryCount);
	DEBUGFS_STATS_ADD(dot11MultipleRetryCount);
	DEBUGFS_STATS_ADD(dot11FrameDuplicateCount);
	DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount);
	DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount);
	DEBUGFS_STATS_ADD(dot11TransmittedFrameCount);
	DEBUGFS_STATS_ADD(tx_handlers_drop);
	DEBUGFS_STATS_ADD(tx_handlers_queued);
	DEBUGFS_STATS_ADD(tx_handlers_drop_wep);
	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc);
	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port);
	DEBUGFS_STATS_ADD(rx_handlers_drop);
	DEBUGFS_STATS_ADD(rx_handlers_queued);
	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc);
	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag);
	DEBUGFS_STATS_ADD(tx_expand_skb_head);
	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned);
	DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag);
	DEBUGFS_STATS_ADD(rx_handlers_fragments);
	DEBUGFS_STATS_ADD(tx_status_drop);
#endif
	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
}