LXR linux/drivers/net/bonding/bond

   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}
  48DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);
  49
  50void 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
  62void bond_debug_unregister(struct bonding *bond)
  63{
  64        if (!bonding_debug_root)
  65                return;
  66
  67        debugfs_remove_recursive(bond->debug_dir);
  68}
  69
  70void 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
  87void 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
  95void bond_destroy_debugfs(void)
  96{
  97        debugfs_remove_recursive(bonding_debug_root);
  98        bonding_debug_root = NULL;
  99}
 100
 101
 102#else /* !CONFIG_DEBUG_FS */
 103
 104void bond_debug_register(struct bonding *bond)
 105{
 106}
 107
 108void bond_debug_unregister(struct bonding *bond)
 109{
 110}
 111
 112void bond_debug_reregister(struct bonding *bond)
 113{
 114}
 115
 116void bond_create_debugfs(void)
 117{
 118}
 119
 120void bond_destroy_debugfs(void)
 121{
 122}
 123
 124#endif /* CONFIG_DEBUG_FS */
 125