mirror of https://gitee.com/openkylin/linux.git
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
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* hsr_debugfs code
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* Copyright (C) 2019 Texas Instruments Incorporated
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*
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* Author(s):
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* Murali Karicheri <m-karicheri2@ti.com>
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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 the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of 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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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/debugfs.h>
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#include "hsr_main.h"
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#include "hsr_framereg.h"
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static void print_mac_address(struct seq_file *sfp, unsigned char *mac)
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{
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seq_printf(sfp, "%02x:%02x:%02x:%02x:%02x:%02x:",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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}
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/* hsr_node_table_show - Formats and prints node_table entries */
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static int
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hsr_node_table_show(struct seq_file *sfp, void *data)
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{
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struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
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struct hsr_node *node;
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seq_puts(sfp, "Node Table entries\n");
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seq_puts(sfp, "MAC-Address-A, MAC-Address-B, time_in[A], ");
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seq_puts(sfp, "time_in[B], Address-B port\n");
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rcu_read_lock();
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list_for_each_entry_rcu(node, &priv->node_db, mac_list) {
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/* skip self node */
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if (hsr_addr_is_self(priv, node->macaddress_A))
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continue;
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print_mac_address(sfp, &node->macaddress_A[0]);
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seq_puts(sfp, " ");
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print_mac_address(sfp, &node->macaddress_B[0]);
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seq_printf(sfp, "0x%lx, ", node->time_in[HSR_PT_SLAVE_A]);
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seq_printf(sfp, "0x%lx ", node->time_in[HSR_PT_SLAVE_B]);
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seq_printf(sfp, "0x%x\n", node->addr_B_port);
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}
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rcu_read_unlock();
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return 0;
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}
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/* hsr_node_table_open - Open the node_table file
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*
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* Description:
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* This routine opens a debugfs file node_table of specific hsr device
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*/
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static int
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hsr_node_table_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, hsr_node_table_show, inode->i_private);
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}
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static const struct file_operations hsr_fops = {
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.owner = THIS_MODULE,
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.open = hsr_node_table_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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/* hsr_debugfs_init - create hsr node_table file for dumping
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* the node table
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*
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* Description:
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* When debugfs is configured this routine sets up the node_table file per
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* hsr device for dumping the node_table entries
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*/
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int hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
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{
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int rc = -1;
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struct dentry *de = NULL;
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de = debugfs_create_dir(hsr_dev->name, NULL);
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if (!de) {
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pr_err("Cannot create hsr debugfs root\n");
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return rc;
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}
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priv->node_tbl_root = de;
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de = debugfs_create_file("node_table", S_IFREG | 0444,
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priv->node_tbl_root, priv,
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&hsr_fops);
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if (!de) {
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pr_err("Cannot create hsr node_table directory\n");
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return rc;
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}
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priv->node_tbl_file = de;
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return 0;
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}
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/* hsr_debugfs_term - Tear down debugfs intrastructure
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*
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* Description:
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* When Debufs is configured this routine removes debugfs file system
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* elements that are specific to hsr
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*/
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void
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hsr_debugfs_term(struct hsr_priv *priv)
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{
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debugfs_remove(priv->node_tbl_file);
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priv->node_tbl_file = NULL;
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debugfs_remove(priv->node_tbl_root);
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priv->node_tbl_root = NULL;
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}
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