1// SPDX-License-Identifier: GPL-2.0
2#include <linux/kernel.h>
3#include <linux/module.h>
4#include <linux/device.h>
5#include <linux/netdevice.h>
6
7#include <net/bonding.h>
8#include <net/bond_alb.h>
9
10#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
11
12#include <linux/debugfs.h>
13#include <linux/seq_file.h>
14
15static struct dentry *bonding_debug_root;
16
17/* Show RLB hash table */
18static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
19{
20	struct bonding *bond = m->private;
21	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
22	struct rlb_client_info *client_info;
23	u32 hash_index;
24
25	if (BOND_MODE(bond) != BOND_MODE_ALB)
26		return 0;
27
28	seq_printf(m, "SourceIP        DestinationIP   "
29			"Destination MAC   DEV\n");
30
31	spin_lock_bh(&bond->mode_lock);
32
33	hash_index = bond_info->rx_hashtbl_used_head;
34	for (; hash_index != RLB_NULL_INDEX;
35	     hash_index = client_info->used_next) {
36		client_info = &(bond_info->rx_hashtbl[hash_index]);
37		seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
38			&client_info->ip_src,
39			&client_info->ip_dst,
40			&client_info->mac_dst,
41			client_info->slave->dev->name);
42	}
43
44	spin_unlock_bh(&bond->mode_lock);
45
46	return 0;
47}
48DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);
49
50void bond_debug_register(struct bonding *bond)
51{
52	if (!bonding_debug_root)
53		return;
54
55	bond->debug_dir =
56		debugfs_create_dir(bond->dev->name, bonding_debug_root);
57
58	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
59				bond, &bond_debug_rlb_hash_fops);
60}
61
62void bond_debug_unregister(struct bonding *bond)
63{
64	if (!bonding_debug_root)
65		return;
66
67	debugfs_remove_recursive(bond->debug_dir);
68}
69
70void bond_debug_reregister(struct bonding *bond)
71{
72	struct dentry *d;
73
74	if (!bonding_debug_root)
75		return;
76
77	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
78			   bonding_debug_root, bond->dev->name);
79	if (!IS_ERR(d)) {
80		bond->debug_dir = d;
81	} else {
82		netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
83		bond_debug_unregister(bond);
84	}
85}
86
87void bond_create_debugfs(void)
88{
89	bonding_debug_root = debugfs_create_dir("bonding", NULL);
90
91	if (!bonding_debug_root) {
92		pr_warn("Warning: Cannot create bonding directory in debugfs\n");
93	}
94}
95
96void bond_destroy_debugfs(void)
97{
98	debugfs_remove_recursive(bonding_debug_root);
99	bonding_debug_root = NULL;
100}
101
102
103#else /* !CONFIG_DEBUG_FS */
104
105void bond_debug_register(struct bonding *bond)
106{
107}
108
109void bond_debug_unregister(struct bonding *bond)
110{
111}
112
113void bond_debug_reregister(struct bonding *bond)
114{
115}
116
117void bond_create_debugfs(void)
118{
119}
120
121void bond_destroy_debugfs(void)
122{
123}
124
125#endif /* CONFIG_DEBUG_FS */
126