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#ifdef CONFIG_DEBUG_FS
10
11#include <linux/debugfs.h>
12#include <linux/seq_file.h>
13
14static struct dentry *bonding_debug_root;
15
16/*
17 *  Show RLB hash table
18 */
19static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
20{
21	struct bonding *bond = m->private;
22	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
23	struct rlb_client_info *client_info;
24	u32 hash_index;
25
26	if (bond->params.mode != BOND_MODE_ALB)
27		return 0;
28
29	seq_printf(m, "SourceIP        DestinationIP   "
30			"Destination MAC   DEV\n");
31
32	spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
33
34	hash_index = bond_info->rx_hashtbl_head;
35	for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->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_ALB_INFO(bond).rx_hashtbl_lock));
45
46	return 0;
47}
48
49static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
50{
51	return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
52}
53
54static const struct file_operations bond_debug_rlb_hash_fops = {
55	.owner		= THIS_MODULE,
56	.open		= bond_debug_rlb_hash_open,
57	.read		= seq_read,
58	.llseek		= seq_lseek,
59	.release	= single_release,
60};
61
62void bond_debug_register(struct bonding *bond)
63{
64	if (!bonding_debug_root)
65		return;
66
67	bond->debug_dir =
68		debugfs_create_dir(bond->dev->name, bonding_debug_root);
69
70	if (!bond->debug_dir) {
71		pr_warning("%s: Warning: failed to register to debugfs\n",
72			bond->dev->name);
73		return;
74	}
75
76	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
77				bond, &bond_debug_rlb_hash_fops);
78}
79
80void bond_debug_unregister(struct bonding *bond)
81{
82	if (!bonding_debug_root)
83		return;
84
85	debugfs_remove_recursive(bond->debug_dir);
86}
87
88void bond_debug_reregister(struct bonding *bond)
89{
90	struct dentry *d;
91
92	if (!bonding_debug_root)
93		return;
94
95	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
96			   bonding_debug_root, bond->dev->name);
97	if (d) {
98		bond->debug_dir = d;
99	} else {
100		pr_warning("%s: Warning: failed to reregister, "
101				"so just unregister old one\n",
102				bond->dev->name);
103		bond_debug_unregister(bond);
104	}
105}
106
107void bond_create_debugfs(void)
108{
109	bonding_debug_root = debugfs_create_dir("bonding", NULL);
110
111	if (!bonding_debug_root) {
112		pr_warning("Warning: Cannot create bonding directory"
113				" in debugfs\n");
114	}
115}
116
117void bond_destroy_debugfs(void)
118{
119	debugfs_remove_recursive(bonding_debug_root);
120	bonding_debug_root = NULL;
121}
122
123
124#else /* !CONFIG_DEBUG_FS */
125
126void bond_debug_register(struct bonding *bond)
127{
128}
129
130void bond_debug_unregister(struct bonding *bond)
131{
132}
133
134void bond_debug_reregister(struct bonding *bond)
135{
136}
137
138void bond_create_debugfs(void)
139{
140}
141
142void bond_destroy_debugfs(void)
143{
144}
145
146#endif /* CONFIG_DEBUG_FS */
147