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c6c8fea2 | 1 | /* |
64afe353 | 2 | * Copyright (C) 2010-2011 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
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 | ||
d3a547be | 53 | __printf(2, 3) |
c6c8fea2 SE |
54 | static int fdebug_log(struct debug_log *debug_log, char *fmt, ...) |
55 | { | |
c6c8fea2 SE |
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); | |
1299bdaa | 65 | vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args); |
c6c8fea2 SE |
66 | va_end(args); |
67 | ||
68 | for (p = debug_log_buf; *p != 0; p++) | |
69 | emit_log_char(debug_log, *p); | |
70 | ||
71 | spin_unlock_bh(&debug_log->lock); | |
72 | ||
73 | wake_up(&debug_log->queue_wait); | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | int debug_log(struct bat_priv *bat_priv, char *fmt, ...) | |
79 | { | |
80 | va_list args; | |
81 | char tmp_log_buf[256]; | |
82 | ||
83 | va_start(args, fmt); | |
84 | vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args); | |
85 | fdebug_log(bat_priv->debug_log, "[%10u] %s", | |
86 | (jiffies / HZ), tmp_log_buf); | |
87 | va_end(args); | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | static int log_open(struct inode *inode, struct file *file) | |
93 | { | |
94 | nonseekable_open(inode, file); | |
95 | file->private_data = inode->i_private; | |
96 | inc_module_count(); | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int log_release(struct inode *inode, struct file *file) | |
101 | { | |
102 | dec_module_count(); | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static ssize_t log_read(struct file *file, char __user *buf, | |
107 | size_t count, loff_t *ppos) | |
108 | { | |
109 | struct bat_priv *bat_priv = file->private_data; | |
110 | struct debug_log *debug_log = bat_priv->debug_log; | |
111 | int error, i = 0; | |
112 | char c; | |
113 | ||
114 | if ((file->f_flags & O_NONBLOCK) && | |
115 | !(debug_log->log_end - debug_log->log_start)) | |
116 | return -EAGAIN; | |
117 | ||
118 | if ((!buf) || (count < 0)) | |
119 | return -EINVAL; | |
120 | ||
121 | if (count == 0) | |
122 | return 0; | |
123 | ||
124 | if (!access_ok(VERIFY_WRITE, buf, count)) | |
125 | return -EFAULT; | |
126 | ||
127 | error = wait_event_interruptible(debug_log->queue_wait, | |
128 | (debug_log->log_start - debug_log->log_end)); | |
129 | ||
130 | if (error) | |
131 | return error; | |
132 | ||
133 | spin_lock_bh(&debug_log->lock); | |
134 | ||
135 | while ((!error) && (i < count) && | |
136 | (debug_log->log_start != debug_log->log_end)) { | |
137 | c = LOG_BUFF(debug_log->log_start); | |
138 | ||
139 | debug_log->log_start++; | |
140 | ||
141 | spin_unlock_bh(&debug_log->lock); | |
142 | ||
143 | error = __put_user(c, buf); | |
144 | ||
145 | spin_lock_bh(&debug_log->lock); | |
146 | ||
147 | buf++; | |
148 | i++; | |
149 | ||
150 | } | |
151 | ||
152 | spin_unlock_bh(&debug_log->lock); | |
153 | ||
154 | if (!error) | |
155 | return i; | |
156 | ||
157 | return error; | |
158 | } | |
159 | ||
160 | static unsigned int log_poll(struct file *file, poll_table *wait) | |
161 | { | |
162 | struct bat_priv *bat_priv = file->private_data; | |
163 | struct debug_log *debug_log = bat_priv->debug_log; | |
164 | ||
165 | poll_wait(file, &debug_log->queue_wait, wait); | |
166 | ||
167 | if (debug_log->log_end - debug_log->log_start) | |
168 | return POLLIN | POLLRDNORM; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static const struct file_operations log_fops = { | |
174 | .open = log_open, | |
175 | .release = log_release, | |
176 | .read = log_read, | |
177 | .poll = log_poll, | |
178 | .llseek = no_llseek, | |
179 | }; | |
180 | ||
181 | static int debug_log_setup(struct bat_priv *bat_priv) | |
182 | { | |
183 | struct dentry *d; | |
184 | ||
185 | if (!bat_priv->debug_dir) | |
186 | goto err; | |
187 | ||
188 | bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC); | |
189 | if (!bat_priv->debug_log) | |
190 | goto err; | |
191 | ||
192 | spin_lock_init(&bat_priv->debug_log->lock); | |
193 | init_waitqueue_head(&bat_priv->debug_log->queue_wait); | |
194 | ||
195 | d = debugfs_create_file("log", S_IFREG | S_IRUSR, | |
196 | bat_priv->debug_dir, bat_priv, &log_fops); | |
197 | if (d) | |
198 | goto err; | |
199 | ||
200 | return 0; | |
201 | ||
202 | err: | |
203 | return 1; | |
204 | } | |
205 | ||
206 | static void debug_log_cleanup(struct bat_priv *bat_priv) | |
207 | { | |
208 | kfree(bat_priv->debug_log); | |
209 | bat_priv->debug_log = NULL; | |
210 | } | |
211 | #else /* CONFIG_BATMAN_ADV_DEBUG */ | |
212 | static int debug_log_setup(struct bat_priv *bat_priv) | |
213 | { | |
214 | bat_priv->debug_log = NULL; | |
215 | return 0; | |
216 | } | |
217 | ||
218 | static void debug_log_cleanup(struct bat_priv *bat_priv) | |
219 | { | |
220 | return; | |
221 | } | |
222 | #endif | |
223 | ||
224 | static int originators_open(struct inode *inode, struct file *file) | |
225 | { | |
226 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
227 | return single_open(file, orig_seq_print_text, net_dev); | |
228 | } | |
229 | ||
230 | static int gateways_open(struct inode *inode, struct file *file) | |
231 | { | |
232 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
233 | return single_open(file, gw_client_seq_print_text, net_dev); | |
234 | } | |
235 | ||
236 | static int softif_neigh_open(struct inode *inode, struct file *file) | |
237 | { | |
238 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
239 | return single_open(file, softif_neigh_seq_print_text, net_dev); | |
240 | } | |
241 | ||
242 | static int transtable_global_open(struct inode *inode, struct file *file) | |
243 | { | |
244 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
2dafb49d | 245 | return single_open(file, tt_global_seq_print_text, net_dev); |
c6c8fea2 SE |
246 | } |
247 | ||
248 | static int transtable_local_open(struct inode *inode, struct file *file) | |
249 | { | |
250 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
2dafb49d | 251 | return single_open(file, tt_local_seq_print_text, net_dev); |
c6c8fea2 SE |
252 | } |
253 | ||
254 | static int vis_data_open(struct inode *inode, struct file *file) | |
255 | { | |
256 | struct net_device *net_dev = (struct net_device *)inode->i_private; | |
257 | return single_open(file, vis_seq_print_text, net_dev); | |
258 | } | |
259 | ||
260 | struct bat_debuginfo { | |
261 | struct attribute attr; | |
262 | const struct file_operations fops; | |
263 | }; | |
264 | ||
265 | #define BAT_DEBUGINFO(_name, _mode, _open) \ | |
266 | struct bat_debuginfo bat_debuginfo_##_name = { \ | |
267 | .attr = { .name = __stringify(_name), \ | |
268 | .mode = _mode, }, \ | |
269 | .fops = { .owner = THIS_MODULE, \ | |
270 | .open = _open, \ | |
271 | .read = seq_read, \ | |
272 | .llseek = seq_lseek, \ | |
273 | .release = single_release, \ | |
274 | } \ | |
275 | }; | |
276 | ||
277 | static BAT_DEBUGINFO(originators, S_IRUGO, originators_open); | |
278 | static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open); | |
279 | static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open); | |
280 | static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open); | |
281 | static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open); | |
282 | static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open); | |
283 | ||
284 | static struct bat_debuginfo *mesh_debuginfos[] = { | |
285 | &bat_debuginfo_originators, | |
286 | &bat_debuginfo_gateways, | |
287 | &bat_debuginfo_softif_neigh, | |
288 | &bat_debuginfo_transtable_global, | |
289 | &bat_debuginfo_transtable_local, | |
290 | &bat_debuginfo_vis_data, | |
291 | NULL, | |
292 | }; | |
293 | ||
294 | void debugfs_init(void) | |
295 | { | |
296 | bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL); | |
297 | if (bat_debugfs == ERR_PTR(-ENODEV)) | |
298 | bat_debugfs = NULL; | |
299 | } | |
300 | ||
301 | void debugfs_destroy(void) | |
302 | { | |
303 | if (bat_debugfs) { | |
304 | debugfs_remove_recursive(bat_debugfs); | |
305 | bat_debugfs = NULL; | |
306 | } | |
307 | } | |
308 | ||
309 | int debugfs_add_meshif(struct net_device *dev) | |
310 | { | |
311 | struct bat_priv *bat_priv = netdev_priv(dev); | |
312 | struct bat_debuginfo **bat_debug; | |
313 | struct dentry *file; | |
314 | ||
315 | if (!bat_debugfs) | |
316 | goto out; | |
317 | ||
318 | bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs); | |
319 | if (!bat_priv->debug_dir) | |
320 | goto out; | |
321 | ||
322 | bat_socket_setup(bat_priv); | |
323 | debug_log_setup(bat_priv); | |
324 | ||
325 | for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) { | |
326 | file = debugfs_create_file(((*bat_debug)->attr).name, | |
327 | S_IFREG | ((*bat_debug)->attr).mode, | |
328 | bat_priv->debug_dir, | |
329 | dev, &(*bat_debug)->fops); | |
330 | if (!file) { | |
331 | bat_err(dev, "Can't add debugfs file: %s/%s\n", | |
332 | dev->name, ((*bat_debug)->attr).name); | |
333 | goto rem_attr; | |
334 | } | |
335 | } | |
336 | ||
337 | return 0; | |
338 | rem_attr: | |
339 | debugfs_remove_recursive(bat_priv->debug_dir); | |
340 | bat_priv->debug_dir = NULL; | |
341 | out: | |
342 | #ifdef CONFIG_DEBUG_FS | |
343 | return -ENOMEM; | |
344 | #else | |
345 | return 0; | |
346 | #endif /* CONFIG_DEBUG_FS */ | |
347 | } | |
348 | ||
349 | void debugfs_del_meshif(struct net_device *dev) | |
350 | { | |
351 | struct bat_priv *bat_priv = netdev_priv(dev); | |
352 | ||
353 | debug_log_cleanup(bat_priv); | |
354 | ||
355 | if (bat_debugfs) { | |
356 | debugfs_remove_recursive(bat_priv->debug_dir); | |
357 | bat_priv->debug_dir = NULL; | |
358 | } | |
359 | } |