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1 | /* |
2 | * Copyright (C) 2010-2011 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 | |
36 | static 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 | |
42 | static int log_buff_len = LOG_BUF_LEN; |
43 | |
44 | static 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 | |
53 | static int fdebug_log(struct debug_log *debug_log, char *fmt, ...) |
54 | { |
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); |
64 | vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args); |
65 | va_end(args); |
66 | |
67 | for (p = debug_log_buf; *p != 0; p++) |
68 | emit_log_char(debug_log, *p); |
69 | |
70 | spin_unlock_bh(&debug_log->lock); |
71 | |
72 | wake_up(&debug_log->queue_wait); |
73 | |
74 | return 0; |
75 | } |
76 | |
77 | int debug_log(struct bat_priv *bat_priv, char *fmt, ...) |
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); |
84 | fdebug_log(bat_priv->debug_log, "[%10u] %s", |
85 | (jiffies / HZ), tmp_log_buf); |
86 | va_end(args); |
87 | |
88 | return 0; |
89 | } |
90 | |
91 | static int log_open(struct inode *inode, struct file *file) |
92 | { |
93 | nonseekable_open(inode, file); |
94 | file->private_data = inode->i_private; |
95 | inc_module_count(); |
96 | return 0; |
97 | } |
98 | |
99 | static int log_release(struct inode *inode, struct file *file) |
100 | { |
101 | dec_module_count(); |
102 | return 0; |
103 | } |
104 | |
105 | static ssize_t log_read(struct file *file, char __user *buf, |
106 | size_t count, loff_t *ppos) |
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 | |
117 | if ((!buf) || (count < 0)) |
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 | |
159 | static unsigned int log_poll(struct file *file, poll_table *wait) |
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 | |
172 | static const struct file_operations log_fops = { |
173 | .open = log_open, |
174 | .release = log_release, |
175 | .read = log_read, |
176 | .poll = log_poll, |
177 | .llseek = no_llseek, |
178 | }; |
179 | |
180 | static int debug_log_setup(struct bat_priv *bat_priv) |
181 | { |
182 | struct dentry *d; |
183 | |
184 | if (!bat_priv->debug_dir) |
185 | goto err; |
186 | |
187 | bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC); |
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, |
195 | bat_priv->debug_dir, bat_priv, &log_fops); |
196 | if (d) |
197 | goto err; |
198 | |
199 | return 0; |
200 | |
201 | err: |
202 | return 1; |
203 | } |
204 | |
205 | static void debug_log_cleanup(struct bat_priv *bat_priv) |
206 | { |
207 | kfree(bat_priv->debug_log); |
208 | bat_priv->debug_log = NULL; |
209 | } |
210 | #else /* CONFIG_BATMAN_ADV_DEBUG */ |
211 | static int debug_log_setup(struct bat_priv *bat_priv) |
212 | { |
213 | bat_priv->debug_log = NULL; |
214 | return 0; |
215 | } |
216 | |
217 | static void debug_log_cleanup(struct bat_priv *bat_priv) |
218 | { |
219 | return; |
220 | } |
221 | #endif |
222 | |
223 | static int originators_open(struct inode *inode, struct file *file) |
224 | { |
225 | struct net_device *net_dev = (struct net_device *)inode->i_private; |
226 | return single_open(file, orig_seq_print_text, net_dev); |
227 | } |
228 | |
229 | static int gateways_open(struct inode *inode, struct file *file) |
230 | { |
231 | struct net_device *net_dev = (struct net_device *)inode->i_private; |
232 | return single_open(file, gw_client_seq_print_text, net_dev); |
233 | } |
234 | |
235 | static int softif_neigh_open(struct inode *inode, struct file *file) |
236 | { |
237 | struct net_device *net_dev = (struct net_device *)inode->i_private; |
238 | return single_open(file, softif_neigh_seq_print_text, net_dev); |
239 | } |
240 | |
241 | static int transtable_global_open(struct inode *inode, struct file *file) |
242 | { |
243 | struct net_device *net_dev = (struct net_device *)inode->i_private; |
244 | return single_open(file, hna_global_seq_print_text, net_dev); |
245 | } |
246 | |
247 | static int transtable_local_open(struct inode *inode, struct file *file) |
248 | { |
249 | struct net_device *net_dev = (struct net_device *)inode->i_private; |
250 | return single_open(file, hna_local_seq_print_text, net_dev); |
251 | } |
252 | |
253 | static int vis_data_open(struct inode *inode, struct file *file) |
254 | { |
255 | struct net_device *net_dev = (struct net_device *)inode->i_private; |
256 | return single_open(file, vis_seq_print_text, net_dev); |
257 | } |
258 | |
259 | struct bat_debuginfo { |
260 | struct attribute attr; |
261 | const struct file_operations fops; |
262 | }; |
263 | |
264 | #define BAT_DEBUGINFO(_name, _mode, _open) \ |
265 | struct bat_debuginfo bat_debuginfo_##_name = { \ |
266 | .attr = { .name = __stringify(_name), \ |
267 | .mode = _mode, }, \ |
268 | .fops = { .owner = THIS_MODULE, \ |
269 | .open = _open, \ |
270 | .read = seq_read, \ |
271 | .llseek = seq_lseek, \ |
272 | .release = single_release, \ |
273 | } \ |
274 | }; |
275 | |
276 | static BAT_DEBUGINFO(originators, S_IRUGO, originators_open); |
277 | static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open); |
278 | static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open); |
279 | static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open); |
280 | static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open); |
281 | static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open); |
282 | |
283 | static struct bat_debuginfo *mesh_debuginfos[] = { |
284 | &bat_debuginfo_originators, |
285 | &bat_debuginfo_gateways, |
286 | &bat_debuginfo_softif_neigh, |
287 | &bat_debuginfo_transtable_global, |
288 | &bat_debuginfo_transtable_local, |
289 | &bat_debuginfo_vis_data, |
290 | NULL, |
291 | }; |
292 | |
293 | void debugfs_init(void) |
294 | { |
295 | bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL); |
296 | if (bat_debugfs == ERR_PTR(-ENODEV)) |
297 | bat_debugfs = NULL; |
298 | } |
299 | |
300 | void debugfs_destroy(void) |
301 | { |
302 | if (bat_debugfs) { |
303 | debugfs_remove_recursive(bat_debugfs); |
304 | bat_debugfs = NULL; |
305 | } |
306 | } |
307 | |
308 | int debugfs_add_meshif(struct net_device *dev) |
309 | { |
310 | struct bat_priv *bat_priv = netdev_priv(dev); |
311 | struct bat_debuginfo **bat_debug; |
312 | struct dentry *file; |
313 | |
314 | if (!bat_debugfs) |
315 | goto out; |
316 | |
317 | bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs); |
318 | if (!bat_priv->debug_dir) |
319 | goto out; |
320 | |
321 | bat_socket_setup(bat_priv); |
322 | debug_log_setup(bat_priv); |
323 | |
324 | for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) { |
325 | file = debugfs_create_file(((*bat_debug)->attr).name, |
326 | S_IFREG | ((*bat_debug)->attr).mode, |
327 | bat_priv->debug_dir, |
328 | dev, &(*bat_debug)->fops); |
329 | if (!file) { |
330 | bat_err(dev, "Can't add debugfs file: %s/%s\n", |
331 | dev->name, ((*bat_debug)->attr).name); |
332 | goto rem_attr; |
333 | } |
334 | } |
335 | |
336 | return 0; |
337 | rem_attr: |
338 | debugfs_remove_recursive(bat_priv->debug_dir); |
339 | bat_priv->debug_dir = NULL; |
340 | out: |
341 | #ifdef CONFIG_DEBUG_FS |
342 | return -ENOMEM; |
343 | #else |
344 | return 0; |
345 | #endif /* CONFIG_DEBUG_FS */ |
346 | } |
347 | |
348 | void debugfs_del_meshif(struct net_device *dev) |
349 | { |
350 | struct bat_priv *bat_priv = netdev_priv(dev); |
351 | |
352 | debug_log_cleanup(bat_priv); |
353 | |
354 | if (bat_debugfs) { |
355 | debugfs_remove_recursive(bat_priv->debug_dir); |
356 | bat_priv->debug_dir = NULL; |
357 | } |
358 | } |
359 |
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