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
15 static struct dentry *bonding_debug_root;
16
17 /* Show RLB hash table */
bond_debug_rlb_hash_show(struct seq_file * m,void * v)18 static 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 }
48 DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);
49
bond_debug_register(struct bonding * bond)50 void bond_debug_register(struct bonding *bond)
51 {
52 bond->debug_dir =
53 debugfs_create_dir(bond->dev->name, bonding_debug_root);
54
55 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
56 bond, &bond_debug_rlb_hash_fops);
57 }
58
bond_debug_unregister(struct bonding * bond)59 void bond_debug_unregister(struct bonding *bond)
60 {
61 debugfs_remove_recursive(bond->debug_dir);
62 }
63
bond_debug_reregister(struct bonding * bond)64 void bond_debug_reregister(struct bonding *bond)
65 {
66 int err = debugfs_change_name(bond->debug_dir, "%s", bond->dev->name);
67 if (err) {
68 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
69 bond_debug_unregister(bond);
70 }
71 }
72
bond_create_debugfs(void)73 void __init bond_create_debugfs(void)
74 {
75 bonding_debug_root = debugfs_create_dir("bonding", NULL);
76
77 if (IS_ERR(bonding_debug_root))
78 pr_warn("Warning: Cannot create bonding directory in debugfs\n");
79 }
80
bond_destroy_debugfs(void)81 void bond_destroy_debugfs(void)
82 {
83 debugfs_remove_recursive(bonding_debug_root);
84 bonding_debug_root = NULL;
85 }
86
87
88 #else /* !CONFIG_DEBUG_FS */
89
bond_debug_register(struct bonding * bond)90 void bond_debug_register(struct bonding *bond)
91 {
92 }
93
bond_debug_unregister(struct bonding * bond)94 void bond_debug_unregister(struct bonding *bond)
95 {
96 }
97
bond_debug_reregister(struct bonding * bond)98 void bond_debug_reregister(struct bonding *bond)
99 {
100 }
101
bond_create_debugfs(void)102 void __init bond_create_debugfs(void)
103 {
104 }
105
bond_destroy_debugfs(void)106 void bond_destroy_debugfs(void)
107 {
108 }
109
110 #endif /* CONFIG_DEBUG_FS */
111