// 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 */