drivers/net/bonding/bond_debugfs.c

   1 #include <linux/kernel.h>
   2 #include <linux/module.h>
   3 #include <linux/device.h>
   4 #include <linux/netdevice.h>
   5
   6 #include "bonding.h"
   7 #include "bond_alb.h"
   8
   9 #if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/seq_file.h>
  13
  14 static struct dentry *bonding_debug_root;
  15
  16 /*
  17  *  Show RLB hash table
  18  */
  19 static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
  20 {
  21         struct bonding *bond = m->private;
  22         struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
  23         struct rlb_client_info *client_info;
  24         u32 hash_index;
  25
  26         if (BOND_MODE(bond) != BOND_MODE_ALB)
  27                 return 0;
  28
  29         seq_printf(m, "SourceIP        DestinationIP   "
  30                         "Destination MAC   DEV\n");
  31
  32         spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
  33
  34         hash_index = bond_info->rx_hashtbl_used_head;
  35         for (; hash_index != RLB_NULL_INDEX;
  36              hash_index = client_info->used_next) {
  37                 client_info = &(bond_info->rx_hashtbl[hash_index]);
  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         }
  44
  45         spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
  46
  47         return 0;
  48 }
  49
  50 static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
  51 {
  52         return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
  53 }
  54
  55 static const struct file_operations bond_debug_rlb_hash_fops = {
  56         .owner          = THIS_MODULE,
  57         .open           = bond_debug_rlb_hash_open,
  58         .read           = seq_read,
  59         .llseek         = seq_lseek,
  60         .release        = single_release,
  61 };
  62
  63 void bond_debug_register(struct bonding *bond)
  64 {
  65         if (!bonding_debug_root)
  66                 return;
  67
  68         bond->debug_dir =
  69                 debugfs_create_dir(bond->dev->name, bonding_debug_root);
  70
  71         if (!bond->debug_dir) {
  72                 netdev_warn(bond->dev, "failed to register to debugfs\n");
  73                 return;
  74         }
  75
  76         debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
  77                                 bond, &bond_debug_rlb_hash_fops);
  78 }
  79
  80 void bond_debug_unregister(struct bonding *bond)
  81 {
  82         if (!bonding_debug_root)
  83                 return;
  84
  85         debugfs_remove_recursive(bond->debug_dir);
  86 }
  87
  88 void bond_debug_reregister(struct bonding *bond)
  89 {
  90         struct dentry *d;
  91
  92         if (!bonding_debug_root)
  93                 return;
  94
  95         d = debugfs_rename(bonding_debug_root, bond->debug_dir,
  96                            bonding_debug_root, bond->dev->name);
  97         if (d) {
  98                 bond->debug_dir = d;
  99         } else {
 100                 netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
 101                 bond_debug_unregister(bond);
 102         }
 103 }
 104
 105 void bond_create_debugfs(void)
 106 {
 107         bonding_debug_root = debugfs_create_dir("bonding", NULL);
 108
 109         if (!bonding_debug_root) {
 110                 pr_warn("Warning: Cannot create bonding directory in debugfs\n");
 111         }
 112 }
 113
 114 void bond_destroy_debugfs(void)
 115 {
 116         debugfs_remove_recursive(bonding_debug_root);
 117         bonding_debug_root = NULL;
 118 }
 119
 120
 121 #else /* !CONFIG_DEBUG_FS */
 122
 123 void bond_debug_register(struct bonding *bond)
 124 {
 125 }
 126
 127 void bond_debug_unregister(struct bonding *bond)
 128 {
 129 }
 130
 131 void bond_debug_reregister(struct bonding *bond)
 132 {
 133 }
 134
 135 void bond_create_debugfs(void)
 136 {
 137 }
 138
 139 void bond_destroy_debugfs(void)
 140 {
 141 }
 142
 143 #endif /* CONFIG_DEBUG_FS */