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![Andrew Lunn](/assets/img/avatar_default.png)
Debugfs is not netns aware. It thus has problems when the same interface name exists in multiple network name spaces. Work around this by not creating entries for interfaces in name spaces other than the default name space. This means meshes in network namespaces cannot be managed via debugfs, but there will soon be a netlink interface which is netns aware. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
420 lines
11 KiB
C
420 lines
11 KiB
C
/* Copyright (C) 2010-2016 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "debugfs.h"
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#include "main.h"
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/export.h>
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#include <linux/fs.h>
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#include <linux/netdevice.h>
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#include <linux/printk.h>
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#include <linux/sched.h> /* for linux/wait.h */
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#include <linux/seq_file.h>
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#include <linux/stat.h>
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#include <linux/stddef.h>
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#include <linux/stringify.h>
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#include <linux/sysfs.h>
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#include <net/net_namespace.h>
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#include "bat_algo.h"
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#include "bridge_loop_avoidance.h"
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#include "distributed-arp-table.h"
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#include "gateway_client.h"
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#include "icmp_socket.h"
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#include "log.h"
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#include "multicast.h"
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#include "network-coding.h"
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#include "originator.h"
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#include "translation-table.h"
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static struct dentry *batadv_debugfs;
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static int batadv_algorithms_open(struct inode *inode, struct file *file)
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{
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return single_open(file, batadv_algo_seq_print_text, NULL);
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}
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static int neighbors_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_hardif_neigh_seq_print_text, net_dev);
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}
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static int batadv_originators_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_orig_seq_print_text, net_dev);
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}
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/**
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* batadv_originators_hardif_open - handles debugfs output for the
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* originator table of an hard interface
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* @inode: inode pointer to debugfs file
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* @file: pointer to the seq_file
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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static int batadv_originators_hardif_open(struct inode *inode,
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struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_orig_hardif_seq_print_text, net_dev);
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}
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static int batadv_gateways_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_gw_client_seq_print_text, net_dev);
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}
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static int batadv_transtable_global_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_tt_global_seq_print_text, net_dev);
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}
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#ifdef CONFIG_BATMAN_ADV_BLA
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static int batadv_bla_claim_table_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_bla_claim_table_seq_print_text,
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net_dev);
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}
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static int batadv_bla_backbone_table_open(struct inode *inode,
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struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_bla_backbone_table_seq_print_text,
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net_dev);
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}
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#endif
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#ifdef CONFIG_BATMAN_ADV_DAT
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/**
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* batadv_dat_cache_open - Prepare file handler for reads from dat_chache
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* @inode: inode which was opened
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* @file: file handle to be initialized
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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static int batadv_dat_cache_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_dat_cache_seq_print_text, net_dev);
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}
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#endif
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static int batadv_transtable_local_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_tt_local_seq_print_text, net_dev);
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}
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struct batadv_debuginfo {
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struct attribute attr;
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const struct file_operations fops;
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};
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#ifdef CONFIG_BATMAN_ADV_NC
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static int batadv_nc_nodes_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_nc_nodes_seq_print_text, net_dev);
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}
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#endif
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#ifdef CONFIG_BATMAN_ADV_MCAST
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/**
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* batadv_mcast_flags_open - prepare file handler for reads from mcast_flags
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* @inode: inode which was opened
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* @file: file handle to be initialized
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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static int batadv_mcast_flags_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_mcast_flags_seq_print_text, net_dev);
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}
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#endif
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#define BATADV_DEBUGINFO(_name, _mode, _open) \
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struct batadv_debuginfo batadv_debuginfo_##_name = { \
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.attr = { \
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.name = __stringify(_name), \
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.mode = _mode, \
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}, \
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.fops = { \
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.owner = THIS_MODULE, \
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.open = _open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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}, \
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}
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/* the following attributes are general and therefore they will be directly
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* placed in the BATADV_DEBUGFS_SUBDIR subdirectory of debugfs
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*/
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static BATADV_DEBUGINFO(routing_algos, S_IRUGO, batadv_algorithms_open);
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static struct batadv_debuginfo *batadv_general_debuginfos[] = {
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&batadv_debuginfo_routing_algos,
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NULL,
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};
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/* The following attributes are per soft interface */
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static BATADV_DEBUGINFO(neighbors, S_IRUGO, neighbors_open);
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static BATADV_DEBUGINFO(originators, S_IRUGO, batadv_originators_open);
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static BATADV_DEBUGINFO(gateways, S_IRUGO, batadv_gateways_open);
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static BATADV_DEBUGINFO(transtable_global, S_IRUGO,
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batadv_transtable_global_open);
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#ifdef CONFIG_BATMAN_ADV_BLA
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static BATADV_DEBUGINFO(bla_claim_table, S_IRUGO, batadv_bla_claim_table_open);
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static BATADV_DEBUGINFO(bla_backbone_table, S_IRUGO,
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batadv_bla_backbone_table_open);
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#endif
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#ifdef CONFIG_BATMAN_ADV_DAT
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static BATADV_DEBUGINFO(dat_cache, S_IRUGO, batadv_dat_cache_open);
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#endif
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static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
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batadv_transtable_local_open);
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#ifdef CONFIG_BATMAN_ADV_NC
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static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
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#endif
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#ifdef CONFIG_BATMAN_ADV_MCAST
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static BATADV_DEBUGINFO(mcast_flags, S_IRUGO, batadv_mcast_flags_open);
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#endif
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static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
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&batadv_debuginfo_neighbors,
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&batadv_debuginfo_originators,
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&batadv_debuginfo_gateways,
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&batadv_debuginfo_transtable_global,
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#ifdef CONFIG_BATMAN_ADV_BLA
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&batadv_debuginfo_bla_claim_table,
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&batadv_debuginfo_bla_backbone_table,
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#endif
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#ifdef CONFIG_BATMAN_ADV_DAT
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&batadv_debuginfo_dat_cache,
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#endif
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&batadv_debuginfo_transtable_local,
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#ifdef CONFIG_BATMAN_ADV_NC
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&batadv_debuginfo_nc_nodes,
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#endif
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#ifdef CONFIG_BATMAN_ADV_MCAST
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&batadv_debuginfo_mcast_flags,
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#endif
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NULL,
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};
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#define BATADV_HARDIF_DEBUGINFO(_name, _mode, _open) \
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struct batadv_debuginfo batadv_hardif_debuginfo_##_name = { \
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.attr = { \
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.name = __stringify(_name), \
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.mode = _mode, \
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}, \
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.fops = { \
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.owner = THIS_MODULE, \
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.open = _open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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}, \
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}
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static BATADV_HARDIF_DEBUGINFO(originators, S_IRUGO,
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batadv_originators_hardif_open);
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static struct batadv_debuginfo *batadv_hardif_debuginfos[] = {
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&batadv_hardif_debuginfo_originators,
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NULL,
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};
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void batadv_debugfs_init(void)
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{
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struct batadv_debuginfo **bat_debug;
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struct dentry *file;
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batadv_debugfs = debugfs_create_dir(BATADV_DEBUGFS_SUBDIR, NULL);
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if (batadv_debugfs == ERR_PTR(-ENODEV))
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batadv_debugfs = NULL;
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if (!batadv_debugfs)
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goto err;
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for (bat_debug = batadv_general_debuginfos; *bat_debug; ++bat_debug) {
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file = debugfs_create_file(((*bat_debug)->attr).name,
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S_IFREG | ((*bat_debug)->attr).mode,
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batadv_debugfs, NULL,
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&(*bat_debug)->fops);
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if (!file) {
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pr_err("Can't add general debugfs file: %s\n",
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((*bat_debug)->attr).name);
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goto err;
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}
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}
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return;
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err:
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debugfs_remove_recursive(batadv_debugfs);
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batadv_debugfs = NULL;
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}
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void batadv_debugfs_destroy(void)
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{
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debugfs_remove_recursive(batadv_debugfs);
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batadv_debugfs = NULL;
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}
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/**
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* batadv_debugfs_add_hardif - creates the base directory for a hard interface
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* in debugfs.
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* @hard_iface: hard interface which should be added.
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
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{
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struct net *net = dev_net(hard_iface->net_dev);
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struct batadv_debuginfo **bat_debug;
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struct dentry *file;
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if (!batadv_debugfs)
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goto out;
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if (net != &init_net)
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return 0;
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hard_iface->debug_dir = debugfs_create_dir(hard_iface->net_dev->name,
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batadv_debugfs);
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if (!hard_iface->debug_dir)
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goto out;
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for (bat_debug = batadv_hardif_debuginfos; *bat_debug; ++bat_debug) {
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file = debugfs_create_file(((*bat_debug)->attr).name,
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S_IFREG | ((*bat_debug)->attr).mode,
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hard_iface->debug_dir,
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hard_iface->net_dev,
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&(*bat_debug)->fops);
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if (!file)
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goto rem_attr;
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}
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return 0;
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rem_attr:
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debugfs_remove_recursive(hard_iface->debug_dir);
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hard_iface->debug_dir = NULL;
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out:
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return -ENOMEM;
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}
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/**
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* batadv_debugfs_del_hardif - delete the base directory for a hard interface
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* in debugfs.
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* @hard_iface: hard interface which is deleted.
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*/
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void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
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{
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struct net *net = dev_net(hard_iface->net_dev);
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if (net != &init_net)
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return;
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if (batadv_debugfs) {
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debugfs_remove_recursive(hard_iface->debug_dir);
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hard_iface->debug_dir = NULL;
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}
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}
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int batadv_debugfs_add_meshif(struct net_device *dev)
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{
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struct batadv_priv *bat_priv = netdev_priv(dev);
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struct batadv_debuginfo **bat_debug;
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struct net *net = dev_net(dev);
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struct dentry *file;
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if (!batadv_debugfs)
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goto out;
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if (net != &init_net)
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return 0;
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bat_priv->debug_dir = debugfs_create_dir(dev->name, batadv_debugfs);
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if (!bat_priv->debug_dir)
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goto out;
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if (batadv_socket_setup(bat_priv) < 0)
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goto rem_attr;
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if (batadv_debug_log_setup(bat_priv) < 0)
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goto rem_attr;
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for (bat_debug = batadv_mesh_debuginfos; *bat_debug; ++bat_debug) {
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file = debugfs_create_file(((*bat_debug)->attr).name,
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S_IFREG | ((*bat_debug)->attr).mode,
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bat_priv->debug_dir,
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dev, &(*bat_debug)->fops);
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if (!file) {
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batadv_err(dev, "Can't add debugfs file: %s/%s\n",
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dev->name, ((*bat_debug)->attr).name);
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goto rem_attr;
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}
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}
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if (batadv_nc_init_debugfs(bat_priv) < 0)
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goto rem_attr;
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return 0;
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rem_attr:
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debugfs_remove_recursive(bat_priv->debug_dir);
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bat_priv->debug_dir = NULL;
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out:
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return -ENOMEM;
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}
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void batadv_debugfs_del_meshif(struct net_device *dev)
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{
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struct batadv_priv *bat_priv = netdev_priv(dev);
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struct net *net = dev_net(dev);
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if (net != &init_net)
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return;
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batadv_debug_log_cleanup(bat_priv);
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if (batadv_debugfs) {
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debugfs_remove_recursive(bat_priv->debug_dir);
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bat_priv->debug_dir = NULL;
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}
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}
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