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 if (!bonding_debug_root)
53 return;
54
55 bond->debug_dir =
56 debugfs_create_dir(bond->dev->name, bonding_debug_root);
57
58 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
59 bond, &bond_debug_rlb_hash_fops);
60 }
61
bond_debug_unregister(struct bonding * bond)62 void bond_debug_unregister(struct bonding *bond)
63 {
64 if (!bonding_debug_root)
65 return;
66
67 debugfs_remove_recursive(bond->debug_dir);
68 }
69
bond_debug_reregister(struct bonding * bond)70 void bond_debug_reregister(struct bonding *bond)
71 {
72 struct dentry *d;
73
74 if (!bonding_debug_root)
75 return;
76
77 d = debugfs_rename(bonding_debug_root, bond->debug_dir,
78 bonding_debug_root, bond->dev->name);
79 if (d) {
80 bond->debug_dir = d;
81 } else {
82 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
83 bond_debug_unregister(bond);
84 }
85 }
86
bond_create_debugfs(void)87 void bond_create_debugfs(void)
88 {
89 bonding_debug_root = debugfs_create_dir("bonding", NULL);
90
91 if (!bonding_debug_root) {
92 pr_warn("Warning: Cannot create bonding directory in debugfs\n");
93 }
94 }
95
bond_destroy_debugfs(void)96 void bond_destroy_debugfs(void)
97 {
98 debugfs_remove_recursive(bonding_debug_root);
99 bonding_debug_root = NULL;
100 }
101
102
103 #else /* !CONFIG_DEBUG_FS */
104
bond_debug_register(struct bonding * bond)105 void bond_debug_register(struct bonding *bond)
106 {
107 }
108
bond_debug_unregister(struct bonding * bond)109 void bond_debug_unregister(struct bonding *bond)
110 {
111 }
112
bond_debug_reregister(struct bonding * bond)113 void bond_debug_reregister(struct bonding *bond)
114 {
115 }
116
bond_create_debugfs(void)117 void bond_create_debugfs(void)
118 {
119 }
120
bond_destroy_debugfs(void)121 void bond_destroy_debugfs(void)
122 {
123 }
124
125 #endif /* CONFIG_DEBUG_FS */
126