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        if (!bond->debug_dir) {
  59                netdev_warn(bond->dev, "failed to register to debugfs\n");
  60                return;
  61        }
  62
  63        debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
  64                                bond, &bond_debug_rlb_hash_fops);
  65}
  66
  67void bond_debug_unregister(struct bonding *bond)
  68{
  69        if (!bonding_debug_root)
  70                return;
  71
  72        debugfs_remove_recursive(bond->debug_dir);
  73}
  74
  75void bond_debug_reregister(struct bonding *bond)
  76{
  77        struct dentry *d;
  78
  79        if (!bonding_debug_root)
  80                return;
  81
  82        d = debugfs_rename(bonding_debug_root, bond->debug_dir,
  83                           bonding_debug_root, bond->dev->name);
  84        if (d) {
  85                bond->debug_dir = d;
  86        } else {
  87                netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
  88                bond_debug_unregister(bond);
  89        }
  90}
  91
  92void bond_create_debugfs(void)
  93{
  94        bonding_debug_root = debugfs_create_dir("bonding", NULL);
  95
  96        if (!bonding_debug_root) {
  97                pr_warn("Warning: Cannot create bonding directory in debugfs\n");
  98        }
  99}
 100
 101void bond_destroy_debugfs(void)
 102{
 103        debugfs_remove_recursive(bonding_debug_root);
 104        bonding_debug_root = NULL;
 105}
 106
 107
 108#else /* !CONFIG_DEBUG_FS */
 109
 110void bond_debug_register(struct bonding *bond)
 111{
 112}
 113
 114void bond_debug_unregister(struct bonding *bond)
 115{
 116}
 117
 118void bond_debug_reregister(struct bonding *bond)
 119{
 120}
 121
 122void bond_create_debugfs(void)
 123{
 124}
 125
 126void bond_destroy_debugfs(void)
 127{
 128}
 129
 130#endif /* CONFIG_DEBUG_FS */
 131