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Commit | Line | Data |
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fc4ecaee | 1 | /* |
8f4c0e01 | 2 | * debugfs code for HSR & PRP |
32712733 | 3 | * Copyright (C) 2019 Texas Instruments Incorporated |
fc4ecaee MK |
4 | * |
5 | * Author(s): | |
32712733 | 6 | * Murali Karicheri <m-karicheri2@ti.com> |
fc4ecaee MK |
7 | * |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation version 2. | |
11 | * | |
12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
13 | * kind, whether express or implied; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | #include <linux/module.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/debugfs.h> | |
4acc45db | 20 | #include <linux/jhash.h> |
fc4ecaee MK |
21 | #include "hsr_main.h" |
22 | #include "hsr_framereg.h" | |
23 | ||
c6c4ccd7 TY |
24 | static struct dentry *hsr_debugfs_root_dir; |
25 | ||
9c5f8a19 | 26 | /* hsr_node_table_show - Formats and prints node_table entries */ |
fc4ecaee | 27 | static int |
9c5f8a19 | 28 | hsr_node_table_show(struct seq_file *sfp, void *data) |
fc4ecaee MK |
29 | { |
30 | struct hsr_priv *priv = (struct hsr_priv *)sfp->private; | |
31 | struct hsr_node *node; | |
4acc45db | 32 | int i; |
fc4ecaee | 33 | |
795ec4f5 MK |
34 | seq_printf(sfp, "Node Table entries for (%s) device\n", |
35 | (priv->prot_version == PRP_V1 ? "PRP" : "HSR")); | |
36 | seq_puts(sfp, "MAC-Address-A, MAC-Address-B, time_in[A], "); | |
37 | seq_puts(sfp, "time_in[B], Address-B port, "); | |
38 | if (priv->prot_version == PRP_V1) | |
39 | seq_puts(sfp, "SAN-A, SAN-B, DAN-P\n"); | |
40 | else | |
41 | seq_puts(sfp, "DAN-H\n"); | |
42 | ||
fc4ecaee | 43 | rcu_read_lock(); |
795ec4f5 | 44 | |
4acc45db JK |
45 | for (i = 0 ; i < priv->hash_buckets; i++) { |
46 | hlist_for_each_entry_rcu(node, &priv->node_db[i], mac_list) { | |
47 | /* skip self node */ | |
48 | if (hsr_addr_is_self(priv, node->macaddress_A)) | |
49 | continue; | |
50 | seq_printf(sfp, "%pM ", &node->macaddress_A[0]); | |
51 | seq_printf(sfp, "%pM ", &node->macaddress_B[0]); | |
52 | seq_printf(sfp, "%10lx, ", | |
53 | node->time_in[HSR_PT_SLAVE_A]); | |
54 | seq_printf(sfp, "%10lx, ", | |
55 | node->time_in[HSR_PT_SLAVE_B]); | |
56 | seq_printf(sfp, "%14x, ", node->addr_B_port); | |
57 | ||
58 | if (priv->prot_version == PRP_V1) | |
59 | seq_printf(sfp, "%5x, %5x, %5x\n", | |
60 | node->san_a, node->san_b, | |
61 | (node->san_a == 0 && | |
62 | node->san_b == 0)); | |
63 | else | |
64 | seq_printf(sfp, "%5x\n", 1); | |
65 | } | |
fc4ecaee MK |
66 | } |
67 | rcu_read_unlock(); | |
68 | return 0; | |
69 | } | |
70 | ||
2170ff08 | 71 | DEFINE_SHOW_ATTRIBUTE(hsr_node_table); |
fc4ecaee | 72 | |
4c2d5e33 TY |
73 | void hsr_debugfs_rename(struct net_device *dev) |
74 | { | |
75 | struct hsr_priv *priv = netdev_priv(dev); | |
76 | struct dentry *d; | |
77 | ||
78 | d = debugfs_rename(hsr_debugfs_root_dir, priv->node_tbl_root, | |
79 | hsr_debugfs_root_dir, dev->name); | |
80 | if (IS_ERR(d)) | |
81 | netdev_warn(dev, "failed to rename\n"); | |
82 | else | |
83 | priv->node_tbl_root = d; | |
84 | } | |
85 | ||
9c5f8a19 | 86 | /* hsr_debugfs_init - create hsr node_table file for dumping |
fc4ecaee MK |
87 | * the node table |
88 | * | |
89 | * Description: | |
90 | * When debugfs is configured this routine sets up the node_table file per | |
9c5f8a19 | 91 | * hsr device for dumping the node_table entries |
fc4ecaee | 92 | */ |
1d19e2d5 | 93 | void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev) |
fc4ecaee | 94 | { |
fc4ecaee MK |
95 | struct dentry *de = NULL; |
96 | ||
c6c4ccd7 | 97 | de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir); |
1d19e2d5 | 98 | if (IS_ERR(de)) { |
c6c4ccd7 | 99 | pr_err("Cannot create hsr debugfs directory\n"); |
1d19e2d5 | 100 | return; |
fc4ecaee MK |
101 | } |
102 | ||
103 | priv->node_tbl_root = de; | |
104 | ||
105 | de = debugfs_create_file("node_table", S_IFREG | 0444, | |
106 | priv->node_tbl_root, priv, | |
2170ff08 | 107 | &hsr_node_table_fops); |
1d19e2d5 | 108 | if (IS_ERR(de)) { |
c6c4ccd7 | 109 | pr_err("Cannot create hsr node_table file\n"); |
1d19e2d5 TY |
110 | debugfs_remove(priv->node_tbl_root); |
111 | priv->node_tbl_root = NULL; | |
112 | return; | |
fc4ecaee | 113 | } |
fc4ecaee MK |
114 | } |
115 | ||
9c5f8a19 | 116 | /* hsr_debugfs_term - Tear down debugfs intrastructure |
fc4ecaee MK |
117 | * |
118 | * Description: | |
7f1330c1 | 119 | * When Debugfs is configured this routine removes debugfs file system |
9c5f8a19 | 120 | * elements that are specific to hsr |
fc4ecaee MK |
121 | */ |
122 | void | |
9c5f8a19 | 123 | hsr_debugfs_term(struct hsr_priv *priv) |
fc4ecaee | 124 | { |
f3f2f984 | 125 | debugfs_remove_recursive(priv->node_tbl_root); |
fc4ecaee MK |
126 | priv->node_tbl_root = NULL; |
127 | } | |
c6c4ccd7 TY |
128 | |
129 | void hsr_debugfs_create_root(void) | |
130 | { | |
131 | hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL); | |
132 | if (IS_ERR(hsr_debugfs_root_dir)) { | |
133 | pr_err("Cannot create hsr debugfs root directory\n"); | |
134 | hsr_debugfs_root_dir = NULL; | |
135 | } | |
136 | } | |
137 | ||
138 | void hsr_debugfs_remove_root(void) | |
139 | { | |
140 | /* debugfs_remove() internally checks NULL and ERROR */ | |
141 | debugfs_remove(hsr_debugfs_root_dir); | |
142 | } |