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 
14 static struct dentry *bonding_debug_root;
15 
16 /*
17  *  Show RLB hash table
18  */
19 static 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 
49 static 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 
54 static 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 
62 void 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 
80 void bond_debug_unregister(struct bonding *bond)
81 {
82 	if (!bonding_debug_root)
83 		return;
84 
85 	debugfs_remove_recursive(bond->debug_dir);
86 }
87 
88 void 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 
107 void 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 
117 void 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 
126 void bond_debug_register(struct bonding *bond)
127 {
128 }
129 
130 void bond_debug_unregister(struct bonding *bond)
131 {
132 }
133 
134 void bond_debug_reregister(struct bonding *bond)
135 {
136 }
137 
138 void bond_create_debugfs(void)
139 {
140 }
141 
142 void bond_destroy_debugfs(void)
143 {
144 }
145 
146 #endif /* CONFIG_DEBUG_FS */
147