linux/net/hsr/hsr_debugfs.c
Taehee Yoo 4c2d5e33dc hsr: rename debugfs file when interface name is changed
hsr interface has own debugfs file, which name is same with interface name.
So, interface name is changed, debugfs file name should be changed too.

Fixes: fc4ecaeebd ("net: hsr: add debugfs support for display node list")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-25 16:35:35 -08:00

148 lines
4.0 KiB
C

/*
* hsr_debugfs code
* Copyright (C) 2019 Texas Instruments Incorporated
*
* Author(s):
* Murali Karicheri <m-karicheri2@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/debugfs.h>
#include "hsr_main.h"
#include "hsr_framereg.h"
static struct dentry *hsr_debugfs_root_dir;
static void print_mac_address(struct seq_file *sfp, unsigned char *mac)
{
seq_printf(sfp, "%02x:%02x:%02x:%02x:%02x:%02x:",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
}
/* hsr_node_table_show - Formats and prints node_table entries */
static int
hsr_node_table_show(struct seq_file *sfp, void *data)
{
struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
struct hsr_node *node;
seq_puts(sfp, "Node Table entries\n");
seq_puts(sfp, "MAC-Address-A, MAC-Address-B, time_in[A], ");
seq_puts(sfp, "time_in[B], Address-B port\n");
rcu_read_lock();
list_for_each_entry_rcu(node, &priv->node_db, mac_list) {
/* skip self node */
if (hsr_addr_is_self(priv, node->macaddress_A))
continue;
print_mac_address(sfp, &node->macaddress_A[0]);
seq_puts(sfp, " ");
print_mac_address(sfp, &node->macaddress_B[0]);
seq_printf(sfp, "0x%lx, ", node->time_in[HSR_PT_SLAVE_A]);
seq_printf(sfp, "0x%lx ", node->time_in[HSR_PT_SLAVE_B]);
seq_printf(sfp, "0x%x\n", node->addr_B_port);
}
rcu_read_unlock();
return 0;
}
/* hsr_node_table_open - Open the node_table file
*
* Description:
* This routine opens a debugfs file node_table of specific hsr device
*/
static int
hsr_node_table_open(struct inode *inode, struct file *filp)
{
return single_open(filp, hsr_node_table_show, inode->i_private);
}
void hsr_debugfs_rename(struct net_device *dev)
{
struct hsr_priv *priv = netdev_priv(dev);
struct dentry *d;
d = debugfs_rename(hsr_debugfs_root_dir, priv->node_tbl_root,
hsr_debugfs_root_dir, dev->name);
if (IS_ERR(d))
netdev_warn(dev, "failed to rename\n");
else
priv->node_tbl_root = d;
}
static const struct file_operations hsr_fops = {
.open = hsr_node_table_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* hsr_debugfs_init - create hsr node_table file for dumping
* the node table
*
* Description:
* When debugfs is configured this routine sets up the node_table file per
* hsr device for dumping the node_table entries
*/
void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
{
struct dentry *de = NULL;
de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir);
if (IS_ERR(de)) {
pr_err("Cannot create hsr debugfs directory\n");
return;
}
priv->node_tbl_root = de;
de = debugfs_create_file("node_table", S_IFREG | 0444,
priv->node_tbl_root, priv,
&hsr_fops);
if (IS_ERR(de)) {
pr_err("Cannot create hsr node_table file\n");
debugfs_remove(priv->node_tbl_root);
priv->node_tbl_root = NULL;
return;
}
priv->node_tbl_file = de;
}
/* hsr_debugfs_term - Tear down debugfs intrastructure
*
* Description:
* When Debufs is configured this routine removes debugfs file system
* elements that are specific to hsr
*/
void
hsr_debugfs_term(struct hsr_priv *priv)
{
debugfs_remove(priv->node_tbl_file);
priv->node_tbl_file = NULL;
debugfs_remove(priv->node_tbl_root);
priv->node_tbl_root = NULL;
}
void hsr_debugfs_create_root(void)
{
hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL);
if (IS_ERR(hsr_debugfs_root_dir)) {
pr_err("Cannot create hsr debugfs root directory\n");
hsr_debugfs_root_dir = NULL;
}
}
void hsr_debugfs_remove_root(void)
{
/* debugfs_remove() internally checks NULL and ERROR */
debugfs_remove(hsr_debugfs_root_dir);
}