tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
15static struct dentry *bonding_debug_root;
16
17/* Show RLB hash table */
18static 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
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 netdev_warn(bond->dev, "failed to register to debugfs\n");
72 return;
73 }
74
75 debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
76 bond, &bond_debug_rlb_hash_fops);
77}
78
79void bond_debug_unregister(struct bonding *bond)
80{
81 if (!bonding_debug_root)
82 return;
83
84 debugfs_remove_recursive(bond->debug_dir);
85}
86
87void bond_debug_reregister(struct bonding *bond)
88{
89 struct dentry *d;
90
91 if (!bonding_debug_root)
92 return;
93
94 d = debugfs_rename(bonding_debug_root, bond->debug_dir,
95 bonding_debug_root, bond->dev->name);
96 if (d) {
97 bond->debug_dir = d;
98 } else {
99 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
100 bond_debug_unregister(bond);
101 }
102}
103
104void bond_create_debugfs(void)
105{
106 bonding_debug_root = debugfs_create_dir("bonding", NULL);
107
108 if (!bonding_debug_root) {
109 pr_warn("Warning: Cannot create bonding directory in debugfs\n");
110 }
111}
112
113void bond_destroy_debugfs(void)
114{
115 debugfs_remove_recursive(bonding_debug_root);
116 bonding_debug_root = NULL;
117}
118
119
120#else /* !CONFIG_DEBUG_FS */
121
122void bond_debug_register(struct bonding *bond)
123{
124}
125
126void bond_debug_unregister(struct bonding *bond)
127{
128}
129
130void bond_debug_reregister(struct bonding *bond)
131{
132}
133
134void bond_create_debugfs(void)
135{
136}
137
138void bond_destroy_debugfs(void)
139{
140}
141
142#endif /* CONFIG_DEBUG_FS */