diff options
author | Sven Eckelmann <sven@narfation.org> | 2010-12-13 06:19:28 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-12-16 16:44:24 -0500 |
commit | c6c8fea29769d998d94fcec9b9f14d4b52b349d3 (patch) | |
tree | 2c8dc8d1a64d48c5737a5745e3c510ff53a23047 /net/batman-adv/bat_debugfs.c | |
parent | b236da6931e2482bfe44a7865dd4e7bb036f3496 (diff) |
net: Add batman-adv meshing protocol
B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing
protocol for multi-hop ad-hoc mesh networks. The networks may be wired or
wireless. See http://www.open-mesh.org/ for more information and user space
tools.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/batman-adv/bat_debugfs.c')
-rw-r--r-- | net/batman-adv/bat_debugfs.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/net/batman-adv/bat_debugfs.c b/net/batman-adv/bat_debugfs.c new file mode 100644 index 000000000000..0ae81d07f102 --- /dev/null +++ b/net/batman-adv/bat_debugfs.c | |||
@@ -0,0 +1,360 @@ | |||
1 | /* | ||
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 | |||
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 | 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 | |||
79 | int 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 | |||
93 | static 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 | |||
101 | static int log_release(struct inode *inode, struct file *file) | ||
102 | { | ||
103 | dec_module_count(); | ||
104 | return 0; | ||
105 | } | ||
106 | |||
107 | static 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 | |||
161 | static 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 | |||
174 | static 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 | |||
182 | static 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 | |||
203 | err: | ||
204 | return 1; | ||
205 | } | ||
206 | |||
207 | static 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 */ | ||
213 | static int debug_log_setup(struct bat_priv *bat_priv) | ||
214 | { | ||
215 | bat_priv->debug_log = NULL; | ||
216 | return 0; | ||
217 | } | ||
218 | |||
219 | static void debug_log_cleanup(struct bat_priv *bat_priv) | ||
220 | { | ||
221 | return; | ||
222 | } | ||
223 | #endif | ||
224 | |||
225 | static 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 | |||
231 | static 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 | |||
237 | static 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 | |||
243 | static 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 | |||
249 | static 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 | |||
255 | static 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 | |||
261 | struct bat_debuginfo { | ||
262 | struct attribute attr; | ||
263 | const struct file_operations fops; | ||
264 | }; | ||
265 | |||
266 | #define BAT_DEBUGINFO(_name, _mode, _open) \ | ||
267 | struct 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 | |||
278 | static BAT_DEBUGINFO(originators, S_IRUGO, originators_open); | ||
279 | static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open); | ||
280 | static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open); | ||
281 | static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open); | ||
282 | static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open); | ||
283 | static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open); | ||
284 | |||
285 | static 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 | |||
295 | void 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 | |||
302 | void debugfs_destroy(void) | ||
303 | { | ||
304 | if (bat_debugfs) { | ||
305 | debugfs_remove_recursive(bat_debugfs); | ||
306 | bat_debugfs = NULL; | ||
307 | } | ||
308 | } | ||
309 | |||
310 | int 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; | ||
339 | rem_attr: | ||
340 | debugfs_remove_recursive(bat_priv->debug_dir); | ||
341 | bat_priv->debug_dir = NULL; | ||
342 | out: | ||
343 | #ifdef CONFIG_DEBUG_FS | ||
344 | return -ENOMEM; | ||
345 | #else | ||
346 | return 0; | ||
347 | #endif /* CONFIG_DEBUG_FS */ | ||
348 | } | ||
349 | |||
350 | void 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 | } | ||