Commit | Line | Data |
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9cfc7bd6 | 1 | /* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
20 | #include "main.h" | |
21 | ||
22 | #include <linux/debugfs.h> | |
23 | ||
24 | #include "bat_debugfs.h" | |
25 | #include "translation-table.h" | |
26 | #include "originator.h" | |
27 | #include "hard-interface.h" | |
28 | #include "gateway_common.h" | |
29 | #include "gateway_client.h" | |
30 | #include "soft-interface.h" | |
31 | #include "vis.h" | |
32 | #include "icmp_socket.h" | |
9bf8e4d4 | 33 | #include "bridge_loop_avoidance.h" |
c6c8fea2 | 34 | |
9e466250 | 35 | static struct dentry *batadv_debugfs; |
c6c8fea2 SE |
36 | |
37 | #ifdef CONFIG_BATMAN_ADV_DEBUG | |
9e466250 | 38 | #define LOG_BUFF_MASK (batadv_log_buff_len - 1) |
c6c8fea2 SE |
39 | #define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK]) |
40 | ||
9e466250 | 41 | static int batadv_log_buff_len = LOG_BUF_LEN; |
c6c8fea2 | 42 | |
9e466250 | 43 | static void batadv_emit_log_char(struct debug_log *debug_log, char c) |
c6c8fea2 SE |
44 | { |
45 | LOG_BUFF(debug_log->log_end) = c; | |
46 | debug_log->log_end++; | |
47 | ||
9e466250 SE |
48 | if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len) |
49 | debug_log->log_start = debug_log->log_end - batadv_log_buff_len; | |
c6c8fea2 SE |
50 | } |
51 | ||
d3a547be | 52 | __printf(2, 3) |
9e466250 | 53 | static int batadv_fdebug_log(struct debug_log *debug_log, const char *fmt, ...) |
c6c8fea2 | 54 | { |
c6c8fea2 SE |
55 | va_list args; |
56 | static char debug_log_buf[256]; | |
57 | char *p; | |
58 | ||
59 | if (!debug_log) | |
60 | return 0; | |
61 | ||
62 | spin_lock_bh(&debug_log->lock); | |
63 | va_start(args, fmt); | |
1299bdaa | 64 | vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args); |
c6c8fea2 SE |
65 | va_end(args); |
66 | ||
67 | for (p = debug_log_buf; *p != 0; p++) | |
9e466250 | 68 | batadv_emit_log_char(debug_log, *p); |
c6c8fea2 SE |
69 | |
70 | spin_unlock_bh(&debug_log->lock); | |
71 | ||
72 | wake_up(&debug_log->queue_wait); | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
40a072d7 | 77 | int batadv_debug_log(struct bat_priv *bat_priv, const char *fmt, ...) |
c6c8fea2 SE |
78 | { |
79 | va_list args; | |
80 | char tmp_log_buf[256]; | |
81 | ||
82 | va_start(args, fmt); | |
83 | vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args); | |
9e466250 SE |
84 | batadv_fdebug_log(bat_priv->debug_log, "[%10u] %s", |
85 | jiffies_to_msecs(jiffies), tmp_log_buf); | |
c6c8fea2 SE |
86 | va_end(args); |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
9e466250 | 91 | static int batadv_log_open(struct inode *inode, struct file *file) |
c6c8fea2 SE |
92 | { |
93 | nonseekable_open(inode, file); | |
94 | file->private_data = inode->i_private; | |
3193e8fd | 95 | batadv_inc_module_count(); |
c6c8fea2 SE |
96 | return 0; |
97 | } | |
98 | ||
9e466250 | 99 | static int batadv_log_release(struct inode *inode, struct file *file) |
c6c8fea2 | 100 | { |
3193e8fd | 101 | batadv_dec_module_count(); |
c6c8fea2 SE |
102 | return 0; |
103 | } | |
104 | ||
9e466250 SE |
105 | static ssize_t batadv_log_read(struct file *file, char __user *buf, |
106 | size_t count, loff_t *ppos) | |
c6c8fea2 SE |
107 | { |
108 | struct bat_priv *bat_priv = file->private_data; | |
109 | struct debug_log *debug_log = bat_priv->debug_log; | |
110 | int error, i = 0; | |
111 | char c; | |
112 | ||
113 | if ((file->f_flags & O_NONBLOCK) && | |
114 | !(debug_log->log_end - debug_log->log_start)) | |
115 | return -EAGAIN; | |
116 | ||
16f14b45 | 117 | if (!buf) |
c6c8fea2 SE |
118 | return -EINVAL; |
119 | ||
120 | if (count == 0) | |
121 | return 0; | |
122 | ||
123 | if (!access_ok(VERIFY_WRITE, buf, count)) | |
124 | return -EFAULT; | |
125 | ||
126 | error = wait_event_interruptible(debug_log->queue_wait, | |
127 | (debug_log->log_start - debug_log->log_end)); | |
128 | ||
129 | if (error) | |
130 | return error; | |
131 | ||
132 | spin_lock_bh(&debug_log->lock); | |
133 | ||
134 | while ((!error) && (i < count) && | |
135 | (debug_log->log_start != debug_log->log_end)) { | |
136 | c = LOG_BUFF(debug_log->log_start); | |
137 | ||
138 | debug_log->log_start++; | |
139 | ||
140 | spin_unlock_bh(&debug_log->lock); | |
141 | ||
142 | error = __put_user(c, buf); | |
143 | ||
144 | spin_lock_bh(&debug_log->lock); | |
145 | ||
146 | buf++; | |
147 | i++; | |
148 | ||
149 | } | |
150 | ||
151 | spin_unlock_bh(&debug_log->lock); | |
152 | ||
153 | if (!error) | |
154 | return i; | |
155 | ||
156 | return error; | |
157 | } | |
158 | ||
9e466250 | 159 | static unsigned int batadv_log_poll(struct file *file, poll_table *wait) |
c6c8fea2 SE |
160 | { |
161 | struct bat_priv *bat_priv = file->private_data; | |
162 | struct debug_log *debug_log = bat_priv->debug_log; | |
163 | ||
164 | poll_wait(file, &debug_log->queue_wait, wait); | |
165 | ||
166 | if (debug_log->log_end - debug_log->log_start) | |
167 | return POLLIN | POLLRDNORM; | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
9e466250 SE |
172 | static const struct file_operations batadv_log_fops = { |
173 | .open = batadv_log_open, | |
174 | .release = batadv_log_release, | |
175 | .read = batadv_log_read, | |
176 | .poll = batadv_log_poll, | |
c6c8fea2 SE |
177 | .llseek = no_llseek, |
178 | }; | |
179 | ||
9e466250 | 180 | static int batadv_debug_log_setup(struct bat_priv *bat_priv) |
c6c8fea2 SE |
181 | { |
182 | struct dentry *d; | |
183 | ||
184 | if (!bat_priv->debug_dir) | |
185 | goto err; | |
186 | ||
704509b8 | 187 | bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC); |
c6c8fea2 SE |
188 | if (!bat_priv->debug_log) |
189 | goto err; | |
190 | ||
191 | spin_lock_init(&bat_priv->debug_log->lock); | |
192 | init_waitqueue_head(&bat_priv->debug_log->queue_wait); | |
193 | ||
194 | d = debugfs_create_file("log", S_IFREG | S_IRUSR, | |
9e466250 SE |
195 | bat_priv->debug_dir, bat_priv, |
196 | &batadv_log_fops); | |
5346c35e | 197 | if (!d) |
c6c8fea2 SE |
198 | goto err; |
199 | ||
200 | return 0; | |
201 | ||
202 | err: | |
5346c35e | 203 | return -ENOMEM; |
c6c8fea2 SE |
204 | } |
205 | ||
9e466250 | 206 | static void batadv_debug_log_cleanup(struct bat_priv *bat_priv) |
c6c8fea2 SE |
207 | { |
208 | kfree(bat_priv->debug_log); | |
209 | bat_priv->debug_log = NULL; | |
210 | } | |
211 | #else /* CONFIG_BATMAN_ADV_DEBUG */ | |
9e466250 | 212 | static int batadv_debug_log_setup(struct bat_priv *bat_priv) |
c6c8fea2 SE |
213 | { |
214 | bat_priv->debug_log = NULL; | |
215 | return 0; | |
216 | } | |
217 | ||
9e466250 | 218 | static void batadv_debug_log_cleanup(struct bat_priv *bat_priv) |
c6c8fea2 SE |
219 | { |
220 | return; | |
221 | } | |
222 | #endif | |
223 | ||
9e466250 | 224 | static int batadv_algorithms_open(struct inode *inode, struct file *file) |
1c280471 | 225 | { |
3193e8fd | 226 | return single_open(file, batadv_algo_seq_print_text, NULL); |
1c280471 ML |
227 | } |
228 | ||
9e466250 | 229 | static int batadv_originators_open(struct inode *inode, struct file *file) |
c6c8fea2 SE |
230 | { |
231 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
7d211efc | 232 | return single_open(file, batadv_orig_seq_print_text, net_dev); |
c6c8fea2 SE |
233 | } |
234 | ||
9e466250 | 235 | static int batadv_gateways_open(struct inode *inode, struct file *file) |
c6c8fea2 SE |
236 | { |
237 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
7cf06bc6 | 238 | return single_open(file, batadv_gw_client_seq_print_text, net_dev); |
c6c8fea2 SE |
239 | } |
240 | ||
9e466250 | 241 | static int batadv_transtable_global_open(struct inode *inode, struct file *file) |
c6c8fea2 SE |
242 | { |
243 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
08c36d3e | 244 | return single_open(file, batadv_tt_global_seq_print_text, net_dev); |
c6c8fea2 SE |
245 | } |
246 | ||
7a5cc242 | 247 | #ifdef CONFIG_BATMAN_ADV_BLA |
9e466250 | 248 | static int batadv_bla_claim_table_open(struct inode *inode, struct file *file) |
9bf8e4d4 SW |
249 | { |
250 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
08adf151 SE |
251 | return single_open(file, batadv_bla_claim_table_seq_print_text, |
252 | net_dev); | |
9bf8e4d4 | 253 | } |
7a5cc242 | 254 | #endif |
9bf8e4d4 | 255 | |
9e466250 | 256 | static int batadv_transtable_local_open(struct inode *inode, struct file *file) |
c6c8fea2 SE |
257 | { |
258 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
08c36d3e | 259 | return single_open(file, batadv_tt_local_seq_print_text, net_dev); |
c6c8fea2 SE |
260 | } |
261 | ||
9e466250 | 262 | static int batadv_vis_data_open(struct inode *inode, struct file *file) |
c6c8fea2 SE |
263 | { |
264 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
d0f714f4 | 265 | return single_open(file, batadv_vis_seq_print_text, net_dev); |
c6c8fea2 SE |
266 | } |
267 | ||
268 | struct bat_debuginfo { | |
269 | struct attribute attr; | |
270 | const struct file_operations fops; | |
271 | }; | |
272 | ||
9e466250 SE |
273 | #define BAT_DEBUGINFO(_name, _mode, _open) \ |
274 | struct bat_debuginfo batadv_debuginfo_##_name = { \ | |
275 | .attr = { .name = __stringify(_name), \ | |
276 | .mode = _mode, }, \ | |
277 | .fops = { .owner = THIS_MODULE, \ | |
278 | .open = _open, \ | |
279 | .read = seq_read, \ | |
280 | .llseek = seq_lseek, \ | |
281 | .release = single_release, \ | |
282 | } \ | |
c6c8fea2 SE |
283 | }; |
284 | ||
9e466250 SE |
285 | static BAT_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open); |
286 | static BAT_DEBUGINFO(originators, S_IRUGO, batadv_originators_open); | |
287 | static BAT_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open); | |
288 | static BAT_DEBUGINFO(transtable_global, S_IRUGO, batadv_transtable_global_open); | |
7a5cc242 | 289 | #ifdef CONFIG_BATMAN_ADV_BLA |
9e466250 | 290 | static BAT_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open); |
7a5cc242 | 291 | #endif |
9e466250 SE |
292 | static BAT_DEBUGINFO(transtable_local, S_IRUGO, batadv_transtable_local_open); |
293 | static BAT_DEBUGINFO(vis_data, S_IRUGO, batadv_vis_data_open); | |
c6c8fea2 | 294 | |
9e466250 SE |
295 | static struct bat_debuginfo *batadv_mesh_debuginfos[] = { |
296 | &batadv_debuginfo_originators, | |
297 | &batadv_debuginfo_gateways, | |
298 | &batadv_debuginfo_transtable_global, | |
7a5cc242 | 299 | #ifdef CONFIG_BATMAN_ADV_BLA |
9e466250 | 300 | &batadv_debuginfo_bla_claim_table, |
7a5cc242 | 301 | #endif |
9e466250 SE |
302 | &batadv_debuginfo_transtable_local, |
303 | &batadv_debuginfo_vis_data, | |
c6c8fea2 SE |
304 | NULL, |
305 | }; | |
306 | ||
40a072d7 | 307 | void batadv_debugfs_init(void) |
c6c8fea2 | 308 | { |
1c280471 ML |
309 | struct bat_debuginfo *bat_debug; |
310 | struct dentry *file; | |
311 | ||
9e466250 SE |
312 | batadv_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL); |
313 | if (batadv_debugfs == ERR_PTR(-ENODEV)) | |
314 | batadv_debugfs = NULL; | |
1c280471 | 315 | |
9e466250 | 316 | if (!batadv_debugfs) |
1c280471 ML |
317 | goto out; |
318 | ||
9e466250 | 319 | bat_debug = &batadv_debuginfo_routing_algos; |
1c280471 ML |
320 | file = debugfs_create_file(bat_debug->attr.name, |
321 | S_IFREG | bat_debug->attr.mode, | |
9e466250 | 322 | batadv_debugfs, NULL, &bat_debug->fops); |
1c280471 ML |
323 | if (!file) |
324 | pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name); | |
325 | ||
326 | out: | |
327 | return; | |
c6c8fea2 SE |
328 | } |
329 | ||
40a072d7 | 330 | void batadv_debugfs_destroy(void) |
c6c8fea2 | 331 | { |
9e466250 SE |
332 | if (batadv_debugfs) { |
333 | debugfs_remove_recursive(batadv_debugfs); | |
334 | batadv_debugfs = NULL; | |
c6c8fea2 SE |
335 | } |
336 | } | |
337 | ||
40a072d7 | 338 | int batadv_debugfs_add_meshif(struct net_device *dev) |
c6c8fea2 SE |
339 | { |
340 | struct bat_priv *bat_priv = netdev_priv(dev); | |
341 | struct bat_debuginfo **bat_debug; | |
342 | struct dentry *file; | |
343 | ||
9e466250 | 344 | if (!batadv_debugfs) |
c6c8fea2 SE |
345 | goto out; |
346 | ||
9e466250 | 347 | bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs); |
c6c8fea2 SE |
348 | if (!bat_priv->debug_dir) |
349 | goto out; | |
350 | ||
9039dc7e | 351 | if (batadv_socket_setup(bat_priv) < 0) |
5346c35e SE |
352 | goto rem_attr; |
353 | ||
9e466250 | 354 | if (batadv_debug_log_setup(bat_priv) < 0) |
5346c35e | 355 | goto rem_attr; |
c6c8fea2 | 356 | |
9e466250 | 357 | for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) { |
c6c8fea2 SE |
358 | file = debugfs_create_file(((*bat_debug)->attr).name, |
359 | S_IFREG | ((*bat_debug)->attr).mode, | |
360 | bat_priv->debug_dir, | |
361 | dev, &(*bat_debug)->fops); | |
362 | if (!file) { | |
363 | bat_err(dev, "Can't add debugfs file: %s/%s\n", | |
364 | dev->name, ((*bat_debug)->attr).name); | |
365 | goto rem_attr; | |
366 | } | |
367 | } | |
368 | ||
369 | return 0; | |
370 | rem_attr: | |
371 | debugfs_remove_recursive(bat_priv->debug_dir); | |
372 | bat_priv->debug_dir = NULL; | |
373 | out: | |
374 | #ifdef CONFIG_DEBUG_FS | |
375 | return -ENOMEM; | |
376 | #else | |
377 | return 0; | |
378 | #endif /* CONFIG_DEBUG_FS */ | |
379 | } | |
380 | ||
40a072d7 | 381 | void batadv_debugfs_del_meshif(struct net_device *dev) |
c6c8fea2 SE |
382 | { |
383 | struct bat_priv *bat_priv = netdev_priv(dev); | |
384 | ||
9e466250 | 385 | batadv_debug_log_cleanup(bat_priv); |
c6c8fea2 | 386 | |
9e466250 | 387 | if (batadv_debugfs) { |
c6c8fea2 SE |
388 | debugfs_remove_recursive(bat_priv->debug_dir); |
389 | bat_priv->debug_dir = NULL; | |
390 | } | |
391 | } |