bond_debugfs.c

  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		if (client_info->slave)
 38			seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
 39				   &client_info->ip_src,
 40				   &client_info->ip_dst,
 41				   &client_info->mac_dst,
 42				   client_info->slave->dev->name);
 43		else
 44			seq_printf(m, "%-15pI4 %-15pI4 %-17pM (none)\n",
 45				   &client_info->ip_src,
 46				   &client_info->ip_dst,
 47				   &client_info->mac_dst);
 48	}
 49
 50	spin_unlock_bh(&bond->mode_lock);
 51
 52	return 0;
 53}
 54DEFINE_SHOW_ATTRIBUTE(bond_debug_rlb_hash);
 55
 56void bond_debug_register(struct bonding *bond)
 57{
 58	bond->debug_dir =
 59		debugfs_create_dir(bond->dev->name, bonding_debug_root);
 60
 61	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
 62				bond, &bond_debug_rlb_hash_fops);
 63}
 64
 65void bond_debug_unregister(struct bonding *bond)
 66{
 67	debugfs_remove_recursive(bond->debug_dir);
 68}
 69
 70void bond_debug_reregister(struct bonding *bond)
 71{
 72	int err = debugfs_change_name(bond->debug_dir, "%s", bond->dev->name);
 73	if (err) {
 74		netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
 75		bond_debug_unregister(bond);
 76	}
 77}
 78
 79void __init bond_create_debugfs(void)
 80{
 81	bonding_debug_root = debugfs_create_dir("bonding", NULL);
 82
 83	if (IS_ERR(bonding_debug_root))
 84		pr_warn("Warning: Cannot create bonding directory in debugfs\n");
 85}
 86
 87void bond_destroy_debugfs(void)
 88{
 89	debugfs_remove_recursive(bonding_debug_root);
 90	bonding_debug_root = NULL;
 91}
 92
 93
 94#else /* !CONFIG_DEBUG_FS */
 95
 96void bond_debug_register(struct bonding *bond)
 97{
 98}
 99
100void bond_debug_unregister(struct bonding *bond)
101{
102}
103
104void bond_debug_reregister(struct bonding *bond)
105{
106}
107
108void __init bond_create_debugfs(void)
109{
110}
111
112void bond_destroy_debugfs(void)
113{
114}
115
116#endif /* CONFIG_DEBUG_FS */