1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * debugfs code for HSR & PRP
4 * Copyright (C) 2019 Texas Instruments Incorporated
5 *
6 * Author(s):
7 * Murali Karicheri <m-karicheri2@ti.com>
8 */
9#include <linux/module.h>
10#include <linux/errno.h>
11#include <linux/debugfs.h>
12#include "hsr_main.h"
13#include "hsr_framereg.h"
14
15static struct dentry *hsr_debugfs_root_dir;
16
17/* hsr_node_table_show - Formats and prints node_table entries */
18static int
19hsr_node_table_show(struct seq_file *sfp, void *data)
20{
21 struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
22 struct hsr_node *node;
23
24 seq_printf(m: sfp, fmt: "Node Table entries for (%s) device\n",
25 (priv->prot_version == PRP_V1 ? "PRP" : "HSR"));
26 seq_puts(m: sfp, s: "MAC-Address-A, MAC-Address-B, time_in[A], ");
27 seq_puts(m: sfp, s: "time_in[B], Address-B port, ");
28 if (priv->prot_version == PRP_V1)
29 seq_puts(m: sfp, s: "SAN-A, SAN-B, DAN-P\n");
30 else
31 seq_puts(m: sfp, s: "DAN-H\n");
32
33 rcu_read_lock();
34 list_for_each_entry_rcu(node, &priv->node_db, mac_list) {
35 /* skip self node */
36 if (hsr_addr_is_self(hsr: priv, addr: node->macaddress_A))
37 continue;
38 seq_printf(m: sfp, fmt: "%pM ", &node->macaddress_A[0]);
39 seq_printf(m: sfp, fmt: "%pM ", &node->macaddress_B[0]);
40 seq_printf(m: sfp, fmt: "%10lx, ", node->time_in[HSR_PT_SLAVE_A]);
41 seq_printf(m: sfp, fmt: "%10lx, ", node->time_in[HSR_PT_SLAVE_B]);
42 seq_printf(m: sfp, fmt: "%14x, ", node->addr_B_port);
43
44 if (priv->prot_version == PRP_V1)
45 seq_printf(m: sfp, fmt: "%5x, %5x, %5x\n",
46 node->san_a, node->san_b,
47 (node->san_a == 0 && node->san_b == 0));
48 else
49 seq_printf(m: sfp, fmt: "%5x\n", 1);
50 }
51 rcu_read_unlock();
52 return 0;
53}
54
55DEFINE_SHOW_ATTRIBUTE(hsr_node_table);
56
57void hsr_debugfs_rename(struct net_device *dev)
58{
59 struct hsr_priv *priv = netdev_priv(dev);
60 struct dentry *d;
61
62 d = debugfs_rename(old_dir: hsr_debugfs_root_dir, old_dentry: priv->node_tbl_root,
63 new_dir: hsr_debugfs_root_dir, new_name: dev->name);
64 if (IS_ERR(ptr: d))
65 netdev_warn(dev, format: "failed to rename\n");
66 else
67 priv->node_tbl_root = d;
68}
69
70/* hsr_debugfs_init - create hsr node_table file for dumping
71 * the node table
72 *
73 * Description:
74 * When debugfs is configured this routine sets up the node_table file per
75 * hsr device for dumping the node_table entries
76 */
77void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
78{
79 struct dentry *de = NULL;
80
81 de = debugfs_create_dir(name: hsr_dev->name, parent: hsr_debugfs_root_dir);
82 if (IS_ERR(ptr: de)) {
83 pr_err("Cannot create hsr debugfs directory\n");
84 return;
85 }
86
87 priv->node_tbl_root = de;
88
89 de = debugfs_create_file(name: "node_table", S_IFREG | 0444,
90 parent: priv->node_tbl_root, data: priv,
91 fops: &hsr_node_table_fops);
92 if (IS_ERR(ptr: de)) {
93 pr_err("Cannot create hsr node_table file\n");
94 debugfs_remove(dentry: priv->node_tbl_root);
95 priv->node_tbl_root = NULL;
96 return;
97 }
98}
99
100/* hsr_debugfs_term - Tear down debugfs intrastructure
101 *
102 * Description:
103 * When Debugfs is configured this routine removes debugfs file system
104 * elements that are specific to hsr
105 */
106void
107hsr_debugfs_term(struct hsr_priv *priv)
108{
109 debugfs_remove_recursive(dentry: priv->node_tbl_root);
110 priv->node_tbl_root = NULL;
111}
112
113void hsr_debugfs_create_root(void)
114{
115 hsr_debugfs_root_dir = debugfs_create_dir(name: "hsr", NULL);
116 if (IS_ERR(ptr: hsr_debugfs_root_dir)) {
117 pr_err("Cannot create hsr debugfs root directory\n");
118 hsr_debugfs_root_dir = NULL;
119 }
120}
121
122void hsr_debugfs_remove_root(void)
123{
124 /* debugfs_remove() internally checks NULL and ERROR */
125 debugfs_remove(dentry: hsr_debugfs_root_dir);
126}
127

source code of linux/net/hsr/hsr_debugfs.c