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2aec85b26f
Based on the normalized pattern:
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
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference.
Reviewed-by: Allison Randal <allison@lohutok.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* debugfs code for HSR & PRP
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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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#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 <linux/jhash.h>
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#include "hsr_main.h"
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#include "hsr_framereg.h"
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static struct dentry *hsr_debugfs_root_dir;
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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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int i;
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seq_printf(sfp, "Node Table entries for (%s) device\n",
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(priv->prot_version == PRP_V1 ? "PRP" : "HSR"));
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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, ");
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if (priv->prot_version == PRP_V1)
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seq_puts(sfp, "SAN-A, SAN-B, DAN-P\n");
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else
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seq_puts(sfp, "DAN-H\n");
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rcu_read_lock();
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for (i = 0 ; i < priv->hash_buckets; i++) {
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hlist_for_each_entry_rcu(node, &priv->node_db[i], 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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seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
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seq_printf(sfp, "%pM ", &node->macaddress_B[0]);
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seq_printf(sfp, "%10lx, ",
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node->time_in[HSR_PT_SLAVE_A]);
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seq_printf(sfp, "%10lx, ",
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node->time_in[HSR_PT_SLAVE_B]);
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seq_printf(sfp, "%14x, ", node->addr_B_port);
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if (priv->prot_version == PRP_V1)
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seq_printf(sfp, "%5x, %5x, %5x\n",
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node->san_a, node->san_b,
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(node->san_a == 0 &&
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node->san_b == 0));
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else
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seq_printf(sfp, "%5x\n", 1);
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}
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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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DEFINE_SHOW_ATTRIBUTE(hsr_node_table);
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void hsr_debugfs_rename(struct net_device *dev)
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{
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struct hsr_priv *priv = netdev_priv(dev);
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struct dentry *d;
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d = debugfs_rename(hsr_debugfs_root_dir, priv->node_tbl_root,
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hsr_debugfs_root_dir, dev->name);
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if (IS_ERR(d))
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netdev_warn(dev, "failed to rename\n");
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else
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priv->node_tbl_root = d;
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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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void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
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{
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struct dentry *de = NULL;
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de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir);
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if (IS_ERR(de)) {
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pr_err("Cannot create hsr debugfs directory\n");
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return;
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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_node_table_fops);
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if (IS_ERR(de)) {
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pr_err("Cannot create hsr node_table file\n");
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debugfs_remove(priv->node_tbl_root);
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priv->node_tbl_root = NULL;
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return;
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}
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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 Debugfs 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_recursive(priv->node_tbl_root);
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priv->node_tbl_root = NULL;
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}
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void hsr_debugfs_create_root(void)
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{
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hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL);
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if (IS_ERR(hsr_debugfs_root_dir)) {
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pr_err("Cannot create hsr debugfs root directory\n");
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hsr_debugfs_root_dir = NULL;
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}
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}
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void hsr_debugfs_remove_root(void)
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{
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/* debugfs_remove() internally checks NULL and ERROR */
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debugfs_remove(hsr_debugfs_root_dir);
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}
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