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Linux kernel mirror (for testing)
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kernel
os
linux
6lowpan: add debugfs support
This patch will introduce a 6lowpan entry into the debugfs if enabled.
Inside this 6lowpan directory we create a subdirectories of all 6lowpan
interfaces to offer a per interface debugfs support.
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
authored by
Alexander Aring
and committed by
Marcel Holtmann
b1815fd9
00f59314
+120
-1
+3
include/net/6lowpan.h
+3
include/net/6lowpan.h
···
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#ifndef __6LOWPAN_H__
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#define __6LOWPAN_H__
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#include <linux/debugfs.h>
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#include <net/ipv6.h>
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#include <net/net_namespace.h>
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···
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struct lowpan_priv {
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enum lowpan_lltypes lltype;
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struct dentry *iface_debugfs;
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/* must be last */
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u8 priv[0] __aligned(sizeof(void *));
+28
net/6lowpan/6lowpan_i.h
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net/6lowpan/6lowpan_i.h
···
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#ifndef __6LOWPAN_I_H
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#define __6LOWPAN_I_H
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#include <linux/netdevice.h>
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#ifdef CONFIG_6LOWPAN_DEBUGFS
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int lowpan_dev_debugfs_init(struct net_device *dev);
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void lowpan_dev_debugfs_exit(struct net_device *dev);
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int __init lowpan_debugfs_init(void);
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void lowpan_debugfs_exit(void);
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#else
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static inline int lowpan_dev_debugfs_init(struct net_device *dev)
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{
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return 0;
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}
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static inline void lowpan_dev_debugfs_exit(struct net_device *dev) { }
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static inline int __init lowpan_debugfs_init(void)
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{
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return 0;
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}
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static inline void lowpan_debugfs_exit(void) { }
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#endif /* CONFIG_6LOWPAN_DEBUGFS */
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#endif /* __6LOWPAN_I_H */
+8
net/6lowpan/Kconfig
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net/6lowpan/Kconfig
···
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This enables IPv6 over Low power Wireless Personal Area Network -
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"6LoWPAN" which is supported by IEEE 802.15.4 or Bluetooth stacks.
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config 6LOWPAN_DEBUGFS
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bool "6LoWPAN debugfs support"
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depends on 6LOWPAN
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depends on DEBUG_FS
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---help---
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This enables 6LoWPAN debugfs support. For example to manipulate
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IPHC context information at runtime.
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menuconfig 6LOWPAN_NHC
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tristate "Next Header and Generic Header Compression Support"
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depends on 6LOWPAN
+1
net/6lowpan/Makefile
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net/6lowpan/Makefile
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-1
net/6lowpan/core.c
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-1
net/6lowpan/core.c
···
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#include <net/6lowpan.h>
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#include "6lowpan_i.h"
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int lowpan_register_netdevice(struct net_device *dev,
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enum lowpan_lltypes lltype)
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{
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int ret;
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dev->addr_len = EUI64_ADDR_LEN;
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dev->type = ARPHRD_6LOWPAN;
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dev->mtu = IPV6_MIN_MTU;
···
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lowpan_priv(dev)->lltype = lltype;
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-
return register_netdevice(dev);
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ret = lowpan_dev_debugfs_init(dev);
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if (ret < 0)
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return ret;
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ret = register_netdevice(dev);
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if (ret < 0)
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lowpan_dev_debugfs_exit(dev);
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return ret;
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}
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EXPORT_SYMBOL(lowpan_register_netdevice);
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···
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void lowpan_unregister_netdevice(struct net_device *dev)
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{
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unregister_netdevice(dev);
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lowpan_dev_debugfs_exit(dev);
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}
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EXPORT_SYMBOL(lowpan_unregister_netdevice);
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···
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static int __init lowpan_module_init(void)
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{
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int ret;
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ret = lowpan_debugfs_init();
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if (ret < 0)
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return ret;
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request_module_nowait("ipv6");
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request_module_nowait("nhc_dest");
···
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return 0;
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}
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static void __exit lowpan_module_exit(void)
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{
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lowpan_debugfs_exit();
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}
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module_init(lowpan_module_init);
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module_exit(lowpan_module_exit);
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MODULE_LICENSE("GPL");
+53
net/6lowpan/debugfs.c
+53
net/6lowpan/debugfs.c
···
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/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Authors:
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* (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
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* Copyright (c) 2015 Nordic Semiconductor. All Rights Reserved.
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*/
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#include <net/6lowpan.h>
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#include "6lowpan_i.h"
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static struct dentry *lowpan_debugfs;
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int lowpan_dev_debugfs_init(struct net_device *dev)
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{
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struct lowpan_priv *lpriv = lowpan_priv(dev);
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/* creating the root */
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lpriv->iface_debugfs = debugfs_create_dir(dev->name, lowpan_debugfs);
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if (!lpriv->iface_debugfs)
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goto fail;
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return 0;
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fail:
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return -EINVAL;
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}
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void lowpan_dev_debugfs_exit(struct net_device *dev)
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{
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debugfs_remove_recursive(lowpan_priv(dev)->iface_debugfs);
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}
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int __init lowpan_debugfs_init(void)
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{
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lowpan_debugfs = debugfs_create_dir("6lowpan", NULL);
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if (!lowpan_debugfs)
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return -EINVAL;
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return 0;
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}
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void lowpan_debugfs_exit(void)
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{
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debugfs_remove_recursive(lowpan_debugfs);
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}