[go: nahoru, domu]
bond_debugfs.c revision 01844098ecd9564cd5f903e3ff6c1ea96355772d 
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/*
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_MODE(bond) != 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_used_head;
35	for (; hash_index != RLB_NULL_INDEX;
36	     hash_index = client_info->used_next) {
37		client_info = &(bond_info->rx_hashtbl[hash_index]);
38		seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
39			&client_info->ip_src,
40			&client_info->ip_dst,
41			&client_info->mac_dst,
42			client_info->slave->dev->name);
43	}
44
45	spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
46
47	return 0;
48}
49
50static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
51{
52	return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
53}
54
55static const struct file_operations bond_debug_rlb_hash_fops = {
56	.owner		= THIS_MODULE,
57	.open		= bond_debug_rlb_hash_open,
58	.read		= seq_read,
59	.llseek		= seq_lseek,
60	.release	= single_release,
61};
62
63void bond_debug_register(struct bonding *bond)
64{
65	if (!bonding_debug_root)
66		return;
67
68	bond->debug_dir =
69		debugfs_create_dir(bond->dev->name, bonding_debug_root);
70
71	if (!bond->debug_dir) {
72		pr_warn("%s: Warning: failed to register to debugfs\n",
73			bond->dev->name);
74		return;
75	}
76
77	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
78				bond, &bond_debug_rlb_hash_fops);
79}
80
81void bond_debug_unregister(struct bonding *bond)
82{
83	if (!bonding_debug_root)
84		return;
85
86	debugfs_remove_recursive(bond->debug_dir);
87}
88
89void bond_debug_reregister(struct bonding *bond)
90{
91	struct dentry *d;
92
93	if (!bonding_debug_root)
94		return;
95
96	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
97			   bonding_debug_root, bond->dev->name);
98	if (d) {
99		bond->debug_dir = d;
100	} else {
101		pr_warn("%s: Warning: failed to reregister, 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_warn("Warning: Cannot create bonding directory in debugfs\n");
113	}
114}
115
116void bond_destroy_debugfs(void)
117{
118	debugfs_remove_recursive(bonding_debug_root);
119	bonding_debug_root = NULL;
120}
121
122
123#else /* !CONFIG_DEBUG_FS */
124
125void bond_debug_register(struct bonding *bond)
126{
127}
128
129void bond_debug_unregister(struct bonding *bond)
130{
131}
132
133void bond_debug_reregister(struct bonding *bond)
134{
135}
136
137void bond_create_debugfs(void)
138{
139}
140
141void bond_destroy_debugfs(void)
142{
143}
144
145#endif /* CONFIG_DEBUG_FS */
146