1#include <linux/kernel.h>
2#include <linux/module.h>
3#include <linux/device.h>
4#include <linux/netdevice.h>
5
6#include "bonding.h"
7#include "bond_alb.h"
8
9#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
10
11#include <linux/debugfs.h>
12#include <linux/seq_file.h>
13
14static struct dentry *bonding_debug_root;
15
16/* Show RLB hash table */
17static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
18{
19	struct bonding *bond = m->private;
20	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
21	struct rlb_client_info *client_info;
22	u32 hash_index;
23
24	if (BOND_MODE(bond) != BOND_MODE_ALB)
25		return 0;
26
27	seq_printf(m, "SourceIP        DestinationIP   "
28			"Destination MAC   DEV\n");
29
30	spin_lock_bh(&bond->mode_lock);
31
32	hash_index = bond_info->rx_hashtbl_used_head;
33	for (; hash_index != RLB_NULL_INDEX;
34	     hash_index = client_info->used_next) {
35		client_info = &(bond_info->rx_hashtbl[hash_index]);
36		seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
37			&client_info->ip_src,
38			&client_info->ip_dst,
39			&client_info->mac_dst,
40			client_info->slave->dev->name);
41	}
42
43	spin_unlock_bh(&bond->mode_lock);
44
45	return 0;
46}
47
48static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
49{
50	return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
51}
52
53static const struct file_operations bond_debug_rlb_hash_fops = {
54	.owner		= THIS_MODULE,
55	.open		= bond_debug_rlb_hash_open,
56	.read		= seq_read,
57	.llseek		= seq_lseek,
58	.release	= single_release,
59};
60
61void bond_debug_register(struct bonding *bond)
62{
63	if (!bonding_debug_root)
64		return;
65
66	bond->debug_dir =
67		debugfs_create_dir(bond->dev->name, bonding_debug_root);
68
69	if (!bond->debug_dir) {
70		netdev_warn(bond->dev, "failed to register to debugfs\n");
71		return;
72	}
73
74	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
75				bond, &bond_debug_rlb_hash_fops);
76}
77
78void bond_debug_unregister(struct bonding *bond)
79{
80	if (!bonding_debug_root)
81		return;
82
83	debugfs_remove_recursive(bond->debug_dir);
84}
85
86void bond_debug_reregister(struct bonding *bond)
87{
88	struct dentry *d;
89
90	if (!bonding_debug_root)
91		return;
92
93	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
94			   bonding_debug_root, bond->dev->name);
95	if (d) {
96		bond->debug_dir = d;
97	} else {
98		netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
99		bond_debug_unregister(bond);
100	}
101}
102
103void bond_create_debugfs(void)
104{
105	bonding_debug_root = debugfs_create_dir("bonding", NULL);
106
107	if (!bonding_debug_root) {
108		pr_warn("Warning: Cannot create bonding directory in debugfs\n");
109	}
110}
111
112void bond_destroy_debugfs(void)
113{
114	debugfs_remove_recursive(bonding_debug_root);
115	bonding_debug_root = NULL;
116}
117
118
119#else /* !CONFIG_DEBUG_FS */
120
121void bond_debug_register(struct bonding *bond)
122{
123}
124
125void bond_debug_unregister(struct bonding *bond)
126{
127}
128
129void bond_debug_reregister(struct bonding *bond)
130{
131}
132
133void bond_create_debugfs(void)
134{
135}
136
137void bond_destroy_debugfs(void)
138{
139}
140
141#endif /* CONFIG_DEBUG_FS */
142