// 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
  ");

  	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]);
  		seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s
  ",
  			&client_info->ip_src,
  			&client_info->ip_dst,
  			&client_info->mac_dst,
  			client_info->slave->dev->name);
  	}

  	spin_unlock_bh(&bond->mode_lock);

  
  	return 0;
  }

  DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);

  void bond_debug_register(struct bonding *bond)
  {
  	if (!bonding_debug_root)
  		return;
  
  	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)
  {
  	if (!bonding_debug_root)
  		return;
  
  	debugfs_remove_recursive(bond->debug_dir);
  }
  
  void bond_debug_reregister(struct bonding *bond)
  {
  	struct dentry *d;
  
  	if (!bonding_debug_root)
  		return;
  
  	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
  			   bonding_debug_root, bond->dev->name);
  	if (d) {
  		bond->debug_dir = d;
  	} else {

  		netdev_warn(bond->dev, "failed to reregister, so just unregister old one
  ");

  		bond_debug_unregister(bond);
  	}
  }
  
  void bond_create_debugfs(void)
  {
  	bonding_debug_root = debugfs_create_dir("bonding", NULL);
  
  	if (!bonding_debug_root) {

  		pr_warn("Warning: Cannot create bonding directory in debugfs
  ");

  	}
  }
  
  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 bond_create_debugfs(void)
  {
  }
  
  void bond_destroy_debugfs(void)
  {
  }
  
  #endif /* CONFIG_DEBUG_FS */