1 files changed, 561 insertions, 0 deletions

diff --git a/kernel/net/batman-adv/debugfs.c b/kernel/net/batman-adv/debugfs.c
new file mode 100644
index 000000000..a4972874c
--- /dev/null
+++ b/kernel/net/batman-adv/debugfs.c
@@ -0,0 +1,561 @@
+/* Copyright (C) 2010-2014 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "main.h"
+
+#include <linux/debugfs.h>
+
+#include "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 "icmp_socket.h"
+#include "bridge_loop_avoidance.h"
+#include "distributed-arp-table.h"
+#include "network-coding.h"
+
+static struct dentry *batadv_debugfs;
+
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+#define BATADV_LOG_BUFF_MASK (batadv_log_buff_len - 1)
+
+static const int batadv_log_buff_len = BATADV_LOG_BUF_LEN;
+
+static char *batadv_log_char_addr(struct batadv_priv_debug_log *debug_log,
+				  size_t idx)
+{
+	return &debug_log->log_buff[idx & BATADV_LOG_BUFF_MASK];
+}
+
+static void batadv_emit_log_char(struct batadv_priv_debug_log *debug_log,
+				 char c)
+{
+	char *char_addr;
+
+	char_addr = batadv_log_char_addr(debug_log, debug_log->log_end);
+	*char_addr = c;
+	debug_log->log_end++;
+
+	if (debug_log->log_end - debug_log->log_start > batadv_log_buff_len)
+		debug_log->log_start = debug_log->log_end - batadv_log_buff_len;
+}
+
+__printf(2, 3)
+static int batadv_fdebug_log(struct batadv_priv_debug_log *debug_log,
+			     const char *fmt, ...)
+{
+	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);
+	vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
+	va_end(args);
+
+	for (p = debug_log_buf; *p != 0; p++)
+		batadv_emit_log_char(debug_log, *p);
+
+	spin_unlock_bh(&debug_log->lock);
+
+	wake_up(&debug_log->queue_wait);
+
+	return 0;
+}
+
+int batadv_debug_log(struct batadv_priv *bat_priv, const char *fmt, ...)
+{
+	va_list args;
+	char tmp_log_buf[256];
+
+	va_start(args, fmt);
+	vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
+	batadv_fdebug_log(bat_priv->debug_log, "[%10u] %s",
+			  jiffies_to_msecs(jiffies), tmp_log_buf);
+	va_end(args);
+
+	return 0;
+}
+
+static int batadv_log_open(struct inode *inode, struct file *file)
+{
+	if (!try_module_get(THIS_MODULE))
+		return -EBUSY;
+
+	nonseekable_open(inode, file);
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+static int batadv_log_release(struct inode *inode, struct file *file)
+{
+	module_put(THIS_MODULE);
+	return 0;
+}
+
+static int batadv_log_empty(struct batadv_priv_debug_log *debug_log)
+{
+	return !(debug_log->log_start - debug_log->log_end);
+}
+
+static ssize_t batadv_log_read(struct file *file, char __user *buf,
+			       size_t count, loff_t *ppos)
+{
+	struct batadv_priv *bat_priv = file->private_data;
+	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
+	int error, i = 0;
+	char *char_addr;
+	char c;
+
+	if ((file->f_flags & O_NONBLOCK) && batadv_log_empty(debug_log))
+		return -EAGAIN;
+
+	if (!buf)
+		return -EINVAL;
+
+	if (count == 0)
+		return 0;
+
+	if (!access_ok(VERIFY_WRITE, buf, count))
+		return -EFAULT;
+
+	error = wait_event_interruptible(debug_log->queue_wait,
+					 (!batadv_log_empty(debug_log)));
+
+	if (error)
+		return error;
+
+	spin_lock_bh(&debug_log->lock);
+
+	while ((!error) && (i < count) &&
+	       (debug_log->log_start != debug_log->log_end)) {
+		char_addr = batadv_log_char_addr(debug_log,
+						 debug_log->log_start);
+		c = *char_addr;
+
+		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 batadv_log_poll(struct file *file, poll_table *wait)
+{
+	struct batadv_priv *bat_priv = file->private_data;
+	struct batadv_priv_debug_log *debug_log = bat_priv->debug_log;
+
+	poll_wait(file, &debug_log->queue_wait, wait);
+
+	if (!batadv_log_empty(debug_log))
+		return POLLIN | POLLRDNORM;
+
+	return 0;
+}
+
+static const struct file_operations batadv_log_fops = {
+	.open           = batadv_log_open,
+	.release        = batadv_log_release,
+	.read           = batadv_log_read,
+	.poll           = batadv_log_poll,
+	.llseek         = no_llseek,
+};
+
+static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
+{
+	struct dentry *d;
+
+	if (!bat_priv->debug_dir)
+		goto err;
+
+	bat_priv->debug_log = kzalloc(sizeof(*bat_priv->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,
+				&batadv_log_fops);
+	if (!d)
+		goto err;
+
+	return 0;
+
+err:
+	return -ENOMEM;
+}
+
+static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
+{
+	kfree(bat_priv->debug_log);
+	bat_priv->debug_log = NULL;
+}
+#else /* CONFIG_BATMAN_ADV_DEBUG */
+static int batadv_debug_log_setup(struct batadv_priv *bat_priv)
+{
+	return 0;
+}
+
+static void batadv_debug_log_cleanup(struct batadv_priv *bat_priv)
+{
+}
+#endif
+
+static int batadv_algorithms_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, batadv_algo_seq_print_text, NULL);
+}
+
+static int batadv_originators_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_orig_seq_print_text, net_dev);
+}
+
+/**
+ * batadv_originators_hardif_open - handles debugfs output for the
+ *  originator table of an hard interface
+ * @inode: inode pointer to debugfs file
+ * @file: pointer to the seq_file
+ */
+static int batadv_originators_hardif_open(struct inode *inode,
+					  struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_orig_hardif_seq_print_text, net_dev);
+}
+
+static int batadv_gateways_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_gw_client_seq_print_text, net_dev);
+}
+
+static int batadv_transtable_global_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_tt_global_seq_print_text, net_dev);
+}
+
+#ifdef CONFIG_BATMAN_ADV_BLA
+static int batadv_bla_claim_table_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_bla_claim_table_seq_print_text,
+			   net_dev);
+}
+
+static int batadv_bla_backbone_table_open(struct inode *inode,
+					  struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_bla_backbone_table_seq_print_text,
+			   net_dev);
+}
+
+#endif
+
+#ifdef CONFIG_BATMAN_ADV_DAT
+/**
+ * batadv_dat_cache_open - Prepare file handler for reads from dat_chache
+ * @inode: inode which was opened
+ * @file: file handle to be initialized
+ */
+static int batadv_dat_cache_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
+}
+#endif
+
+static int batadv_transtable_local_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_tt_local_seq_print_text, net_dev);
+}
+
+struct batadv_debuginfo {
+	struct attribute attr;
+	const struct file_operations fops;
+};
+
+#ifdef CONFIG_BATMAN_ADV_NC
+static int batadv_nc_nodes_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
+}
+#endif
+
+#define BATADV_DEBUGINFO(_name, _mode, _open)		\
+struct batadv_debuginfo batadv_debuginfo_##_name = {	\
+	.attr = { .name = __stringify(_name),		\
+		  .mode = _mode, },			\
+	.fops = { .owner = THIS_MODULE,			\
+		  .open = _open,			\
+		  .read	= seq_read,			\
+		  .llseek = seq_lseek,			\
+		  .release = single_release,		\
+		}					\
+}
+
+/* the following attributes are general and therefore they will be directly
+ * placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
+ */
+static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);
+
+static struct batadv_debuginfo *batadv_general_debuginfos[] = {
+	&batadv_debuginfo_routing_algos,
+	NULL,
+};
+
+/* The following attributes are per soft interface */
+static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
+static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
+static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
+			batadv_transtable_global_open);
+#ifdef CONFIG_BATMAN_ADV_BLA
+static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
+static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
+			batadv_bla_backbone_table_open);
+#endif
+#ifdef CONFIG_BATMAN_ADV_DAT
+static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
+#endif
+static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
+			batadv_transtable_local_open);
+#ifdef CONFIG_BATMAN_ADV_NC
+static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
+#endif
+
+static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
+	&batadv_debuginfo_originators,
+	&batadv_debuginfo_gateways,
+	&batadv_debuginfo_transtable_global,
+#ifdef CONFIG_BATMAN_ADV_BLA
+	&batadv_debuginfo_bla_claim_table,
+	&batadv_debuginfo_bla_backbone_table,
+#endif
+#ifdef CONFIG_BATMAN_ADV_DAT
+	&batadv_debuginfo_dat_cache,
+#endif
+	&batadv_debuginfo_transtable_local,
+#ifdef CONFIG_BATMAN_ADV_NC
+	&batadv_debuginfo_nc_nodes,
+#endif
+	NULL,
+};
+
+#define BATADV_HARDIF_DEBUGINFO(_name, _mode, _open)		\
+struct batadv_debuginfo batadv_hardif_debuginfo_##_name = {	\
+	.attr = {						\
+		.name = __stringify(_name),			\
+		.mode = _mode,					\
+	},							\
+	.fops = {						\
+		.owner = THIS_MODULE,				\
+		.open = _open,					\
+		.read	= seq_read,				\
+		.llseek = seq_lseek,				\
+		.release = single_release,			\
+	},							\
+}
+
+static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO,
+			       batadv_originators_hardif_open);
+
+static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
+	&batadv_hardif_debuginfo_originators,
+	NULL,
+};
+
+void batadv_debugfs_init(void)
+{
+	struct batadv_debuginfo **bat_debug;
+	struct dentry *file;
+
+	batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
+	if (batadv_debugfs == ERR_PTR(-ENODEV))
+		batadv_debugfs = NULL;
+
+	if (!batadv_debugfs)
+		goto err;
+
+	for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
+		file = debugfs_create_file(((*bat_debug)->attr).name,
+					   S_IFREG | ((*bat_debug)->attr).mode,
+					   batadv_debugfs, NULL,
+					   &(*bat_debug)->fops);
+		if (!file) {
+			pr_err("Can't add general debugfs file: %s\n",
+			       ((*bat_debug)->attr).name);
+			goto err;
+		}
+	}
+
+	return;
+err:
+	debugfs_remove_recursive(batadv_debugfs);
+	batadv_debugfs = NULL;
+}
+
+void batadv_debugfs_destroy(void)
+{
+	debugfs_remove_recursive(batadv_debugfs);
+	batadv_debugfs = NULL;
+}
+
+/**
+ * batadv_debugfs_add_hardif - creates the base directory for a hard interface
+ *  in debugfs.
+ * @hard_iface: hard interface which should be added.
+ */
+int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
+{
+	struct batadv_debuginfo **bat_debug;
+	struct dentry *file;
+
+	if (!batadv_debugfs)
+		goto out;
+
+	hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name,
+						   batadv_debugfs);
+	if (!hard_iface->debug_dir)
+		goto out;
+
+	for (bat_debug = batadv_hardif_debuginfos; *bat_debug; ++bat_debug) {
+		file = debugfs_create_file(((*bat_debug)->attr).name,
+					   S_IFREG | ((*bat_debug)->attr).mode,
+					   hard_iface->debug_dir,
+					   hard_iface->net_dev,
+					   &(*bat_debug)->fops);
+		if (!file)
+			goto rem_attr;
+	}
+
+	return 0;
+rem_attr:
+	debugfs_remove_recursive(hard_iface->debug_dir);
+	hard_iface->debug_dir = NULL;
+out:
+#ifdef CONFIG_DEBUG_FS
+	return -ENOMEM;
+#else
+	return 0;
+#endif /* CONFIG_DEBUG_FS */
+}
+
+/**
+ * batadv_debugfs_del_hardif - delete the base directory for a hard interface
+ *  in debugfs.
+ * @hard_iface: hard interface which is deleted.
+ */
+void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
+{
+	if (batadv_debugfs) {
+		debugfs_remove_recursive(hard_iface->debug_dir);
+		hard_iface->debug_dir = NULL;
+	}
+}
+
+int batadv_debugfs_add_meshif(struct net_device *dev)
+{
+	struct batadv_priv *bat_priv = netdev_priv(dev);
+	struct batadv_debuginfo **bat_debug;
+	struct dentry *file;
+
+	if (!batadv_debugfs)
+		goto out;
+
+	bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs);
+	if (!bat_priv->debug_dir)
+		goto out;
+
+	if (batadv_socket_setup(bat_priv) < 0)
+		goto rem_attr;
+
+	if (batadv_debug_log_setup(bat_priv) < 0)
+		goto rem_attr;
+
+	for (bat_debug = batadv_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) {
+			batadv_err(dev, "Can't add debugfs file: %s/%s\n",
+				   dev->name, ((*bat_debug)->attr).name);
+			goto rem_attr;
+		}
+	}
+
+	if (batadv_nc_init_debugfs(bat_priv) < 0)
+		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 batadv_debugfs_del_meshif(struct net_device *dev)
+{
+	struct batadv_priv *bat_priv = netdev_priv(dev);
+
+	batadv_debug_log_cleanup(bat_priv);
+
+	if (batadv_debugfs) {
+		debugfs_remove_recursive(bat_priv->debug_dir);
+		bat_priv->debug_dir = NULL;
+	}
+}