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>
diff --git a/net/batman-adv/bat_debugfs.c b/net/batman-adv/bat_debugfs.c
new file mode 100644
index 0000000..0ae81d0
--- /dev/null
+++ b/net/batman-adv/bat_debugfs.c
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+
+#include <linux/debugfs.h>
+
+#include "bat_debugfs.h"
+#include "translation-table.h"
+#include "originator.h"
+#include "hard-interface.h"
+#include "gateway_common.h"
+#include "gateway_client.h"
+#include "soft-interface.h"
+#include "vis.h"
+#include "icmp_socket.h"
+
+static struct dentry *bat_debugfs;
+
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+#define LOG_BUFF_MASK (log_buff_len-1)
+#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
+
+static int log_buff_len = LOG_BUF_LEN;
+
+static void emit_log_char(struct debug_log *debug_log, char c)
+{
+ LOG_BUFF(debug_log->log_end) = c;
+ debug_log->log_end++;
+
+ if (debug_log->log_end - debug_log->log_start > log_buff_len)
+ debug_log->log_start = debug_log->log_end - log_buff_len;
+}
+
+static int fdebug_log(struct debug_log *debug_log, char *fmt, ...)
+{
+ int printed_len;
+ va_list args;
+ static char debug_log_buf[256];
+ char *p;
+
+ if (!debug_log)
+ return 0;
+
+ spin_lock_bh(&debug_log->lock);
+ va_start(args, fmt);
+ printed_len = vscnprintf(debug_log_buf, sizeof(debug_log_buf),
+ fmt, args);
+ va_end(args);
+
+ for (p = debug_log_buf; *p != 0; p++)
+ emit_log_char(debug_log, *p);
+
+ spin_unlock_bh(&debug_log->lock);
+
+ wake_up(&debug_log->queue_wait);
+
+ return 0;
+}
+
+int debug_log(struct bat_priv *bat_priv, char *fmt, ...)
+{
+ va_list args;
+ char tmp_log_buf[256];
+
+ va_start(args, fmt);
+ vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
+ fdebug_log(bat_priv->debug_log, "[%10u] %s",
+ (jiffies / HZ), tmp_log_buf);
+ va_end(args);
+
+ return 0;
+}
+
+static int log_open(struct inode *inode, struct file *file)
+{
+ nonseekable_open(inode, file);
+ file->private_data = inode->i_private;
+ inc_module_count();
+ return 0;
+}
+
+static int log_release(struct inode *inode, struct file *file)
+{
+ dec_module_count();
+ return 0;
+}
+
+static ssize_t log_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct bat_priv *bat_priv = file->private_data;
+ struct debug_log *debug_log = bat_priv->debug_log;
+ int error, i = 0;
+ char c;
+
+ if ((file->f_flags & O_NONBLOCK) &&
+ !(debug_log->log_end - debug_log->log_start))
+ return -EAGAIN;
+
+ if ((!buf) || (count < 0))
+ return -EINVAL;
+
+ if (count == 0)
+ return 0;
+
+ if (!access_ok(VERIFY_WRITE, buf, count))
+ return -EFAULT;
+
+ error = wait_event_interruptible(debug_log->queue_wait,
+ (debug_log->log_start - debug_log->log_end));
+
+ if (error)
+ return error;
+
+ spin_lock_bh(&debug_log->lock);
+
+ while ((!error) && (i < count) &&
+ (debug_log->log_start != debug_log->log_end)) {
+ c = LOG_BUFF(debug_log->log_start);
+
+ debug_log->log_start++;
+
+ spin_unlock_bh(&debug_log->lock);
+
+ error = __put_user(c, buf);
+
+ spin_lock_bh(&debug_log->lock);
+
+ buf++;
+ i++;
+
+ }
+
+ spin_unlock_bh(&debug_log->lock);
+
+ if (!error)
+ return i;
+
+ return error;
+}
+
+static unsigned int log_poll(struct file *file, poll_table *wait)
+{
+ struct bat_priv *bat_priv = file->private_data;
+ struct debug_log *debug_log = bat_priv->debug_log;
+
+ poll_wait(file, &debug_log->queue_wait, wait);
+
+ if (debug_log->log_end - debug_log->log_start)
+ return POLLIN | POLLRDNORM;
+
+ return 0;
+}
+
+static const struct file_operations log_fops = {
+ .open = log_open,
+ .release = log_release,
+ .read = log_read,
+ .poll = log_poll,
+ .llseek = no_llseek,
+};
+
+static int debug_log_setup(struct bat_priv *bat_priv)
+{
+ struct dentry *d;
+
+ if (!bat_priv->debug_dir)
+ goto err;
+
+ bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC);
+ if (!bat_priv->debug_log)
+ goto err;
+
+ spin_lock_init(&bat_priv->debug_log->lock);
+ init_waitqueue_head(&bat_priv->debug_log->queue_wait);
+
+ d = debugfs_create_file("log", S_IFREG | S_IRUSR,
+ bat_priv->debug_dir, bat_priv, &log_fops);
+ if (d)
+ goto err;
+
+ return 0;
+
+err:
+ return 1;
+}
+
+static void debug_log_cleanup(struct bat_priv *bat_priv)
+{
+ kfree(bat_priv->debug_log);
+ bat_priv->debug_log = NULL;
+}
+#else /* CONFIG_BATMAN_ADV_DEBUG */
+static int debug_log_setup(struct bat_priv *bat_priv)
+{
+ bat_priv->debug_log = NULL;
+ return 0;
+}
+
+static void debug_log_cleanup(struct bat_priv *bat_priv)
+{
+ return;
+}
+#endif
+
+static int originators_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, orig_seq_print_text, net_dev);
+}
+
+static int gateways_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, gw_client_seq_print_text, net_dev);
+}
+
+static int softif_neigh_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, softif_neigh_seq_print_text, net_dev);
+}
+
+static int transtable_global_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, hna_global_seq_print_text, net_dev);
+}
+
+static int transtable_local_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, hna_local_seq_print_text, net_dev);
+}
+
+static int vis_data_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, vis_seq_print_text, net_dev);
+}
+
+struct bat_debuginfo {
+ struct attribute attr;
+ const struct file_operations fops;
+};
+
+#define BAT_DEBUGINFO(_name, _mode, _open) \
+struct bat_debuginfo bat_debuginfo_##_name = { \
+ .attr = { .name = __stringify(_name), \
+ .mode = _mode, }, \
+ .fops = { .owner = THIS_MODULE, \
+ .open = _open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+ } \
+};
+
+static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
+static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
+static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open);
+static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
+static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
+static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
+
+static struct bat_debuginfo *mesh_debuginfos[] = {
+ &bat_debuginfo_originators,
+ &bat_debuginfo_gateways,
+ &bat_debuginfo_softif_neigh,
+ &bat_debuginfo_transtable_global,
+ &bat_debuginfo_transtable_local,
+ &bat_debuginfo_vis_data,
+ NULL,
+};
+
+void debugfs_init(void)
+{
+ bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
+ if (bat_debugfs == ERR_PTR(-ENODEV))
+ bat_debugfs = NULL;
+}
+
+void debugfs_destroy(void)
+{
+ if (bat_debugfs) {
+ debugfs_remove_recursive(bat_debugfs);
+ bat_debugfs = NULL;
+ }
+}
+
+int debugfs_add_meshif(struct net_device *dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct bat_debuginfo **bat_debug;
+ struct dentry *file;
+
+ if (!bat_debugfs)
+ goto out;
+
+ bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
+ if (!bat_priv->debug_dir)
+ goto out;
+
+ bat_socket_setup(bat_priv);
+ debug_log_setup(bat_priv);
+
+ for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
+ file = debugfs_create_file(((*bat_debug)->attr).name,
+ S_IFREG | ((*bat_debug)->attr).mode,
+ bat_priv->debug_dir,
+ dev, &(*bat_debug)->fops);
+ if (!file) {
+ bat_err(dev, "Can't add debugfs file: %s/%s\n",
+ dev->name, ((*bat_debug)->attr).name);
+ goto rem_attr;
+ }
+ }
+
+ return 0;
+rem_attr:
+ debugfs_remove_recursive(bat_priv->debug_dir);
+ bat_priv->debug_dir = NULL;
+out:
+#ifdef CONFIG_DEBUG_FS
+ return -ENOMEM;
+#else
+ return 0;
+#endif /* CONFIG_DEBUG_FS */
+}
+
+void debugfs_del_meshif(struct net_device *dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+
+ debug_log_cleanup(bat_priv);
+
+ if (bat_debugfs) {
+ debugfs_remove_recursive(bat_priv->debug_dir);
+ bat_priv->debug_dir = NULL;
+ }
+}