2 * Copyright (C) 2010 B.A.T.M.A.N. contributors:
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.
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.
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
24 #include <linux/debugfs.h>
26 #include "bat_debugfs.h"
27 #include "translation-table.h"
28 #include "originator.h"
29 #include "hard-interface.h"
31 #include "icmp_socket.h"
33 static struct dentry *bat_debugfs;
35 #ifdef CONFIG_BATMAN_ADV_DEBUG
36 #define LOG_BUFF_MASK (log_buff_len-1)
37 #define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
39 static int log_buff_len = LOG_BUF_LEN;
41 static void emit_log_char(struct debug_log *debug_log, char c)
43 LOG_BUFF(debug_log->log_end) = c;
46 if (debug_log->log_end - debug_log->log_start > log_buff_len)
47 debug_log->log_start = debug_log->log_end - log_buff_len;
50 static int fdebug_log(struct debug_log *debug_log, char *fmt, ...)
54 static char debug_log_buf[256];
61 spin_lock_irqsave(&debug_log->lock, flags);
63 printed_len = vscnprintf(debug_log_buf, sizeof(debug_log_buf),
67 for (p = debug_log_buf; *p != 0; p++)
68 emit_log_char(debug_log, *p);
70 spin_unlock_irqrestore(&debug_log->lock, flags);
72 wake_up(&debug_log->queue_wait);
77 int debug_log(struct bat_priv *bat_priv, char *fmt, ...)
80 char tmp_log_buf[256];
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);
91 static int log_open(struct inode *inode, struct file *file)
93 nonseekable_open(inode, file);
94 file->private_data = inode->i_private;
99 static int log_release(struct inode *inode, struct file *file)
105 static ssize_t log_read(struct file *file, char __user *buf,
106 size_t count, loff_t *ppos)
108 struct bat_priv *bat_priv = file->private_data;
109 struct debug_log *debug_log = bat_priv->debug_log;
114 if ((file->f_flags & O_NONBLOCK) &&
115 !(debug_log->log_end - debug_log->log_start))
118 if ((!buf) || (count < 0))
124 if (!access_ok(VERIFY_WRITE, buf, count))
127 error = wait_event_interruptible(debug_log->queue_wait,
128 (debug_log->log_start - debug_log->log_end));
133 spin_lock_irqsave(&debug_log->lock, flags);
135 while ((!error) && (i < count) &&
136 (debug_log->log_start != debug_log->log_end)) {
137 c = LOG_BUFF(debug_log->log_start);
139 debug_log->log_start++;
141 spin_unlock_irqrestore(&debug_log->lock, flags);
143 error = __put_user(c, buf);
145 spin_lock_irqsave(&debug_log->lock, flags);
152 spin_unlock_irqrestore(&debug_log->lock, flags);
160 static unsigned int log_poll(struct file *file, poll_table *wait)
162 struct bat_priv *bat_priv = file->private_data;
163 struct debug_log *debug_log = bat_priv->debug_log;
165 poll_wait(file, &debug_log->queue_wait, wait);
167 if (debug_log->log_end - debug_log->log_start)
168 return POLLIN | POLLRDNORM;
173 static const struct file_operations log_fops = {
175 .release = log_release,
181 static int debug_log_setup(struct bat_priv *bat_priv)
185 if (!bat_priv->debug_dir)
188 bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC);
189 if (!bat_priv->debug_log)
192 spin_lock_init(&bat_priv->debug_log->lock);
193 init_waitqueue_head(&bat_priv->debug_log->queue_wait);
195 d = debugfs_create_file("log", S_IFREG | S_IRUSR,
196 bat_priv->debug_dir, bat_priv, &log_fops);
206 static void debug_log_cleanup(struct bat_priv *bat_priv)
208 kfree(bat_priv->debug_log);
209 bat_priv->debug_log = NULL;
211 #else /* CONFIG_BATMAN_ADV_DEBUG */
212 static int debug_log_setup(struct bat_priv *bat_priv)
214 bat_priv->debug_log = NULL;
218 static void debug_log_cleanup(struct bat_priv *bat_priv)
224 static int originators_open(struct inode *inode, struct file *file)
226 struct net_device *net_dev = (struct net_device *)inode->i_private;
227 return single_open(file, orig_seq_print_text, net_dev);
230 static int transtable_global_open(struct inode *inode, struct file *file)
232 struct net_device *net_dev = (struct net_device *)inode->i_private;
233 return single_open(file, hna_global_seq_print_text, net_dev);
236 static int transtable_local_open(struct inode *inode, struct file *file)
238 struct net_device *net_dev = (struct net_device *)inode->i_private;
239 return single_open(file, hna_local_seq_print_text, net_dev);
242 static int vis_data_open(struct inode *inode, struct file *file)
244 struct net_device *net_dev = (struct net_device *)inode->i_private;
245 return single_open(file, vis_seq_print_text, net_dev);
248 struct bat_debuginfo {
249 struct attribute attr;
250 const struct file_operations fops;
253 #define BAT_DEBUGINFO(_name, _mode, _open) \
254 struct bat_debuginfo bat_debuginfo_##_name = { \
255 .attr = { .name = __stringify(_name), \
257 .fops = { .owner = THIS_MODULE, \
260 .llseek = seq_lseek, \
261 .release = single_release, \
265 static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
266 static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
267 static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
268 static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
270 static struct bat_debuginfo *mesh_debuginfos[] = {
271 &bat_debuginfo_originators,
272 &bat_debuginfo_transtable_global,
273 &bat_debuginfo_transtable_local,
274 &bat_debuginfo_vis_data,
278 void debugfs_init(void)
280 bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
281 if (bat_debugfs == ERR_PTR(-ENODEV))
285 void debugfs_destroy(void)
288 debugfs_remove_recursive(bat_debugfs);
293 int debugfs_add_meshif(struct net_device *dev)
295 struct bat_priv *bat_priv = netdev_priv(dev);
296 struct bat_debuginfo **bat_debug;
302 bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
303 if (!bat_priv->debug_dir)
306 bat_socket_setup(bat_priv);
307 debug_log_setup(bat_priv);
309 for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
310 file = debugfs_create_file(((*bat_debug)->attr).name,
311 S_IFREG | ((*bat_debug)->attr).mode,
313 dev, &(*bat_debug)->fops);
315 bat_err(dev, "Can't add debugfs file: %s/%s\n",
316 dev->name, ((*bat_debug)->attr).name);
323 debugfs_remove_recursive(bat_priv->debug_dir);
324 bat_priv->debug_dir = NULL;
326 #ifdef CONFIG_DEBUG_FS
330 #endif /* CONFIG_DEBUG_FS */
333 void debugfs_del_meshif(struct net_device *dev)
335 struct bat_priv *bat_priv = netdev_priv(dev);
337 debug_log_cleanup(bat_priv);
340 debugfs_remove_recursive(bat_priv->debug_dir);
341 bat_priv->debug_dir = NULL;