blob: 0ae81d07f1027d720e9b69df9e34fa6b2cbba449 [file] [log] [blame]
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00001/*
2 * Copyright (C) 2010 B.A.T.M.A.N. contributors:
3 *
4 * Marek Lindner
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of version 2 of the GNU General Public
8 * License as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA
19 *
20 */
21
22#include "main.h"
23
24#include <linux/debugfs.h>
25
26#include "bat_debugfs.h"
27#include "translation-table.h"
28#include "originator.h"
29#include "hard-interface.h"
30#include "gateway_common.h"
31#include "gateway_client.h"
32#include "soft-interface.h"
33#include "vis.h"
34#include "icmp_socket.h"
35
36static struct dentry *bat_debugfs;
37
38#ifdef CONFIG_BATMAN_ADV_DEBUG
39#define LOG_BUFF_MASK (log_buff_len-1)
40#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
41
42static int log_buff_len = LOG_BUF_LEN;
43
44static void emit_log_char(struct debug_log *debug_log, char c)
45{
46 LOG_BUFF(debug_log->log_end) = c;
47 debug_log->log_end++;
48
49 if (debug_log->log_end - debug_log->log_start > log_buff_len)
50 debug_log->log_start = debug_log->log_end - log_buff_len;
51}
52
53static int fdebug_log(struct debug_log *debug_log, char *fmt, ...)
54{
55 int printed_len;
56 va_list args;
57 static char debug_log_buf[256];
58 char *p;
59
60 if (!debug_log)
61 return 0;
62
63 spin_lock_bh(&debug_log->lock);
64 va_start(args, fmt);
65 printed_len = vscnprintf(debug_log_buf, sizeof(debug_log_buf),
66 fmt, args);
67 va_end(args);
68
69 for (p = debug_log_buf; *p != 0; p++)
70 emit_log_char(debug_log, *p);
71
72 spin_unlock_bh(&debug_log->lock);
73
74 wake_up(&debug_log->queue_wait);
75
76 return 0;
77}
78
79int debug_log(struct bat_priv *bat_priv, char *fmt, ...)
80{
81 va_list args;
82 char tmp_log_buf[256];
83
84 va_start(args, fmt);
85 vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
86 fdebug_log(bat_priv->debug_log, "[%10u] %s",
87 (jiffies / HZ), tmp_log_buf);
88 va_end(args);
89
90 return 0;
91}
92
93static int log_open(struct inode *inode, struct file *file)
94{
95 nonseekable_open(inode, file);
96 file->private_data = inode->i_private;
97 inc_module_count();
98 return 0;
99}
100
101static int log_release(struct inode *inode, struct file *file)
102{
103 dec_module_count();
104 return 0;
105}
106
107static ssize_t log_read(struct file *file, char __user *buf,
108 size_t count, loff_t *ppos)
109{
110 struct bat_priv *bat_priv = file->private_data;
111 struct debug_log *debug_log = bat_priv->debug_log;
112 int error, i = 0;
113 char c;
114
115 if ((file->f_flags & O_NONBLOCK) &&
116 !(debug_log->log_end - debug_log->log_start))
117 return -EAGAIN;
118
119 if ((!buf) || (count < 0))
120 return -EINVAL;
121
122 if (count == 0)
123 return 0;
124
125 if (!access_ok(VERIFY_WRITE, buf, count))
126 return -EFAULT;
127
128 error = wait_event_interruptible(debug_log->queue_wait,
129 (debug_log->log_start - debug_log->log_end));
130
131 if (error)
132 return error;
133
134 spin_lock_bh(&debug_log->lock);
135
136 while ((!error) && (i < count) &&
137 (debug_log->log_start != debug_log->log_end)) {
138 c = LOG_BUFF(debug_log->log_start);
139
140 debug_log->log_start++;
141
142 spin_unlock_bh(&debug_log->lock);
143
144 error = __put_user(c, buf);
145
146 spin_lock_bh(&debug_log->lock);
147
148 buf++;
149 i++;
150
151 }
152
153 spin_unlock_bh(&debug_log->lock);
154
155 if (!error)
156 return i;
157
158 return error;
159}
160
161static unsigned int log_poll(struct file *file, poll_table *wait)
162{
163 struct bat_priv *bat_priv = file->private_data;
164 struct debug_log *debug_log = bat_priv->debug_log;
165
166 poll_wait(file, &debug_log->queue_wait, wait);
167
168 if (debug_log->log_end - debug_log->log_start)
169 return POLLIN | POLLRDNORM;
170
171 return 0;
172}
173
174static const struct file_operations log_fops = {
175 .open = log_open,
176 .release = log_release,
177 .read = log_read,
178 .poll = log_poll,
179 .llseek = no_llseek,
180};
181
182static int debug_log_setup(struct bat_priv *bat_priv)
183{
184 struct dentry *d;
185
186 if (!bat_priv->debug_dir)
187 goto err;
188
189 bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC);
190 if (!bat_priv->debug_log)
191 goto err;
192
193 spin_lock_init(&bat_priv->debug_log->lock);
194 init_waitqueue_head(&bat_priv->debug_log->queue_wait);
195
196 d = debugfs_create_file("log", S_IFREG | S_IRUSR,
197 bat_priv->debug_dir, bat_priv, &log_fops);
198 if (d)
199 goto err;
200
201 return 0;
202
203err:
204 return 1;
205}
206
207static void debug_log_cleanup(struct bat_priv *bat_priv)
208{
209 kfree(bat_priv->debug_log);
210 bat_priv->debug_log = NULL;
211}
212#else /* CONFIG_BATMAN_ADV_DEBUG */
213static int debug_log_setup(struct bat_priv *bat_priv)
214{
215 bat_priv->debug_log = NULL;
216 return 0;
217}
218
219static void debug_log_cleanup(struct bat_priv *bat_priv)
220{
221 return;
222}
223#endif
224
225static int originators_open(struct inode *inode, struct file *file)
226{
227 struct net_device *net_dev = (struct net_device *)inode->i_private;
228 return single_open(file, orig_seq_print_text, net_dev);
229}
230
231static int gateways_open(struct inode *inode, struct file *file)
232{
233 struct net_device *net_dev = (struct net_device *)inode->i_private;
234 return single_open(file, gw_client_seq_print_text, net_dev);
235}
236
237static int softif_neigh_open(struct inode *inode, struct file *file)
238{
239 struct net_device *net_dev = (struct net_device *)inode->i_private;
240 return single_open(file, softif_neigh_seq_print_text, net_dev);
241}
242
243static int transtable_global_open(struct inode *inode, struct file *file)
244{
245 struct net_device *net_dev = (struct net_device *)inode->i_private;
246 return single_open(file, hna_global_seq_print_text, net_dev);
247}
248
249static int transtable_local_open(struct inode *inode, struct file *file)
250{
251 struct net_device *net_dev = (struct net_device *)inode->i_private;
252 return single_open(file, hna_local_seq_print_text, net_dev);
253}
254
255static int vis_data_open(struct inode *inode, struct file *file)
256{
257 struct net_device *net_dev = (struct net_device *)inode->i_private;
258 return single_open(file, vis_seq_print_text, net_dev);
259}
260
261struct bat_debuginfo {
262 struct attribute attr;
263 const struct file_operations fops;
264};
265
266#define BAT_DEBUGINFO(_name, _mode, _open) \
267struct bat_debuginfo bat_debuginfo_##_name = { \
268 .attr = { .name = __stringify(_name), \
269 .mode = _mode, }, \
270 .fops = { .owner = THIS_MODULE, \
271 .open = _open, \
272 .read = seq_read, \
273 .llseek = seq_lseek, \
274 .release = single_release, \
275 } \
276};
277
278static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
279static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
280static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open);
281static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
282static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
283static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
284
285static struct bat_debuginfo *mesh_debuginfos[] = {
286 &bat_debuginfo_originators,
287 &bat_debuginfo_gateways,
288 &bat_debuginfo_softif_neigh,
289 &bat_debuginfo_transtable_global,
290 &bat_debuginfo_transtable_local,
291 &bat_debuginfo_vis_data,
292 NULL,
293};
294
295void debugfs_init(void)
296{
297 bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
298 if (bat_debugfs == ERR_PTR(-ENODEV))
299 bat_debugfs = NULL;
300}
301
302void debugfs_destroy(void)
303{
304 if (bat_debugfs) {
305 debugfs_remove_recursive(bat_debugfs);
306 bat_debugfs = NULL;
307 }
308}
309
310int debugfs_add_meshif(struct net_device *dev)
311{
312 struct bat_priv *bat_priv = netdev_priv(dev);
313 struct bat_debuginfo **bat_debug;
314 struct dentry *file;
315
316 if (!bat_debugfs)
317 goto out;
318
319 bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
320 if (!bat_priv->debug_dir)
321 goto out;
322
323 bat_socket_setup(bat_priv);
324 debug_log_setup(bat_priv);
325
326 for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
327 file = debugfs_create_file(((*bat_debug)->attr).name,
328 S_IFREG | ((*bat_debug)->attr).mode,
329 bat_priv->debug_dir,
330 dev, &(*bat_debug)->fops);
331 if (!file) {
332 bat_err(dev, "Can't add debugfs file: %s/%s\n",
333 dev->name, ((*bat_debug)->attr).name);
334 goto rem_attr;
335 }
336 }
337
338 return 0;
339rem_attr:
340 debugfs_remove_recursive(bat_priv->debug_dir);
341 bat_priv->debug_dir = NULL;
342out:
343#ifdef CONFIG_DEBUG_FS
344 return -ENOMEM;
345#else
346 return 0;
347#endif /* CONFIG_DEBUG_FS */
348}
349
350void debugfs_del_meshif(struct net_device *dev)
351{
352 struct bat_priv *bat_priv = netdev_priv(dev);
353
354 debug_log_cleanup(bat_priv);
355
356 if (bat_debugfs) {
357 debugfs_remove_recursive(bat_priv->debug_dir);
358 bat_priv->debug_dir = NULL;
359 }
360}