Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 474 insertions, 0 deletions

diff --git a/net/batman-adv/debugfs.c b/net/batman-adv/debugfs.c
new file mode 100644
index 000000000..3cb823783
--- /dev/null
+++ b/net/batman-adv/debugfs.c
@@ -0,0 +1,474 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2010-2018  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 "debugfs.h"
+#include "main.h"
+
+#include <linux/dcache.h>
+#include <linux/debugfs.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/fs.h>
+#include <linux/netdevice.h>
+#include <linux/printk.h>
+#include <linux/seq_file.h>
+#include <linux/stat.h>
+#include <linux/stddef.h>
+#include <linux/stringify.h>
+#include <linux/sysfs.h>
+#include <net/net_namespace.h>
+
+#include "bat_algo.h"
+#include "bridge_loop_avoidance.h"
+#include "distributed-arp-table.h"
+#include "gateway_client.h"
+#include "icmp_socket.h"
+#include "log.h"
+#include "multicast.h"
+#include "network-coding.h"
+#include "originator.h"
+#include "translation-table.h"
+
+static struct dentry *batadv_debugfs;
+
+static int batadv_algorithms_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, batadv_algo_seq_print_text, NULL);
+}
+
+static int neighbors_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_hardif_neigh_seq_print_text, net_dev);
+}
+
+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
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+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_cache
+ * @inode: inode which was opened
+ * @file: file handle to be initialized
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+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
+
+#ifdef CONFIG_BATMAN_ADV_MCAST
+/**
+ * batadv_mcast_flags_open() - prepare file handler for reads from mcast_flags
+ * @inode: inode which was opened
+ * @file: file handle to be initialized
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+static int batadv_mcast_flags_open(struct inode *inode, struct file *file)
+{
+	struct net_device *net_dev = (struct net_device *)inode->i_private;
+
+	return single_open(file, batadv_mcast_flags_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, 0444, 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(neighbors, 0444, neighbors_open);
+static BATADV_DEBUGINFO(originators, 0444, batadv_originators_open);
+static BATADV_DEBUGINFO(gateways, 0444, batadv_gateways_open);
+static BATADV_DEBUGINFO(transtable_global, 0444, batadv_transtable_global_open);
+#ifdef CONFIG_BATMAN_ADV_BLA
+static BATADV_DEBUGINFO(bla_claim_table, 0444, batadv_bla_claim_table_open);
+static BATADV_DEBUGINFO(bla_backbone_table, 0444,
+			batadv_bla_backbone_table_open);
+#endif
+#ifdef CONFIG_BATMAN_ADV_DAT
+static BATADV_DEBUGINFO(dat_cache, 0444, batadv_dat_cache_open);
+#endif
+static BATADV_DEBUGINFO(transtable_local, 0444, batadv_transtable_local_open);
+#ifdef CONFIG_BATMAN_ADV_NC
+static BATADV_DEBUGINFO(nc_nodes, 0444, batadv_nc_nodes_open);
+#endif
+#ifdef CONFIG_BATMAN_ADV_MCAST
+static BATADV_DEBUGINFO(mcast_flags, 0444, batadv_mcast_flags_open);
+#endif
+
+static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
+	&batadv_debuginfo_neighbors,
+	&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
+#ifdef CONFIG_BATMAN_ADV_MCAST
+	&batadv_debuginfo_mcast_flags,
+#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, 0444,
+			       batadv_originators_hardif_open);
+
+static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
+	&batadv_hardif_debuginfo_originators,
+	NULL,
+};
+
+/**
+ * batadv_debugfs_init() - Initialize soft interface independent debugfs entries
+ */
+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;
+}
+
+/**
+ * batadv_debugfs_destroy() - Remove all debugfs entries
+ */
+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.
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
+{
+	struct net *net = dev_net(hard_iface->net_dev);
+	struct batadv_debuginfo **bat_debug;
+	struct dentry *file;
+
+	if (!batadv_debugfs)
+		goto out;
+
+	if (net != &init_net)
+		return 0;
+
+	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:
+	return -ENOMEM;
+}
+
+/**
+ * batadv_debugfs_rename_hardif() - Fix debugfs path for renamed hardif
+ * @hard_iface: hard interface which was renamed
+ */
+void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
+{
+	const char *name = hard_iface->net_dev->name;
+	struct dentry *dir;
+	struct dentry *d;
+
+	dir = hard_iface->debug_dir;
+	if (!dir)
+		return;
+
+	d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
+	if (!d)
+		pr_err("Can't rename debugfs dir to %s\n", name);
+}
+
+/**
+ * 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)
+{
+	struct net *net = dev_net(hard_iface->net_dev);
+
+	if (net != &init_net)
+		return;
+
+	if (batadv_debugfs) {
+		debugfs_remove_recursive(hard_iface->debug_dir);
+		hard_iface->debug_dir = NULL;
+	}
+}
+
+/**
+ * batadv_debugfs_add_meshif() - Initialize interface dependent debugfs entries
+ * @dev: netdev struct of the soft interface
+ *
+ * Return: 0 on success or negative error number in case of failure
+ */
+int batadv_debugfs_add_meshif(struct net_device *dev)
+{
+	struct batadv_priv *bat_priv = netdev_priv(dev);
+	struct batadv_debuginfo **bat_debug;
+	struct net *net = dev_net(dev);
+	struct dentry *file;
+
+	if (!batadv_debugfs)
+		goto out;
+
+	if (net != &init_net)
+		return 0;
+
+	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:
+	return -ENOMEM;
+}
+
+/**
+ * batadv_debugfs_rename_meshif() - Fix debugfs path for renamed softif
+ * @dev: net_device which was renamed
+ */
+void batadv_debugfs_rename_meshif(struct net_device *dev)
+{
+	struct batadv_priv *bat_priv = netdev_priv(dev);
+	const char *name = dev->name;
+	struct dentry *dir;
+	struct dentry *d;
+
+	dir = bat_priv->debug_dir;
+	if (!dir)
+		return;
+
+	d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name);
+	if (!d)
+		pr_err("Can't rename debugfs dir to %s\n", name);
+}
+
+/**
+ * batadv_debugfs_del_meshif() - Remove interface dependent debugfs entries
+ * @dev: netdev struct of the soft interface
+ */
+void batadv_debugfs_del_meshif(struct net_device *dev)
+{
+	struct batadv_priv *bat_priv = netdev_priv(dev);
+	struct net *net = dev_net(dev);
+
+	if (net != &init_net)
+		return;
+
+	batadv_debug_log_cleanup(bat_priv);
+
+	if (batadv_debugfs) {
+		debugfs_remove_recursive(bat_priv->debug_dir);
+		bat_priv->debug_dir = NULL;
+	}
+}