// SPDX-License-Identifier: GPL-2.0#include <linux/kernel.h>#include <linux/module.h>#include <linux/device.h>#include <linux/netdevice.h> #include <net/bonding.h>#include <net/bond_alb.h> #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS) #include <linux/debugfs.h>#include <linux/seq_file.h> static struct dentry *bonding_debug_root; /* Show RLB hash table */static int bond_debug_rlb_hash_show(struct seq_file *m, void *v){	struct bonding *bond = m->private;	struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));	struct rlb_client_info *client_info;	u32 hash_index; 	if (BOND_MODE(bond) != BOND_MODE_ALB)		return 0; 	seq_printf(m, "SourceIP        DestinationIP   "			"Destination MAC   DEV\n"); 	spin_lock_bh(&bond->mode_lock); 	hash_index = bond_info->rx_hashtbl_used_head;	for (; hash_index != RLB_NULL_INDEX;	     hash_index = client_info->used_next) {		client_info = &(bond_info->rx_hashtbl[hash_index]);		if (client_info->slave)			seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",				   &client_info->ip_src,				   &client_info->ip_dst,				   &client_info->mac_dst,				   client_info->slave->dev->name);		else			seq_printf(m, "%-15pI4 %-15pI4 %-17pM (none)\n",				   &client_info->ip_src,				   &client_info->ip_dst,				   &client_info->mac_dst);	} 	spin_unlock_bh(&bond->mode_lock); 	return 0;}DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash); void bond_debug_register(struct bonding *bond){	bond->debug_dir =		debugfs_create_dir(bond->dev->name, bonding_debug_root); 	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,				bond, &bond_debug_rlb_hash_fops);} void bond_debug_unregister(struct bonding *bond){	debugfs_remove_recursive(bond->debug_dir);} void bond_debug_reregister(struct bonding *bond){	int err = debugfs_change_name(bond->debug_dir, "%s", bond->dev->name);	if (err) {		netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");		bond_debug_unregister(bond);	}} void __init bond_create_debugfs(void){	bonding_debug_root = debugfs_create_dir("bonding", NULL); 	if (IS_ERR(bonding_debug_root))		pr_warn("Warning: Cannot create bonding directory in debugfs\n");} void bond_destroy_debugfs(void){	debugfs_remove_recursive(bonding_debug_root);	bonding_debug_root = NULL;}  #else /* !CONFIG_DEBUG_FS */ void bond_debug_register(struct bonding *bond){} void bond_debug_unregister(struct bonding *bond){} void bond_debug_reregister(struct bonding *bond){} void __init bond_create_debugfs(void){} void bond_destroy_debugfs(void){} #endif /* CONFIG_DEBUG_FS */