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 #ifdef CONFIG_DEBUG_FS
  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->params.mode != 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_head;
  35         for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->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_ALB_INFO(bond).rx_hashtbl_lock));
  45
  46         return 0;
  47 }
  48
  49 static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
  50 {
  51         return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
  52 }
  53
  54 static const struct file_operations bond_debug_rlb_hash_fops = {
  55         .owner          = THIS_MODULE,
  56         .open           = bond_debug_rlb_hash_open,
  57         .read           = seq_read,
  58         .llseek         = seq_lseek,
  59         .release        = single_release,
  60 };
  61
  62 void bond_debug_register(struct bonding *bond)
  63 {
  64         if (!bonding_debug_root)
  65                 return;
  66
  67         bond->debug_dir =
  68                 debugfs_create_dir(bond->dev->name, bonding_debug_root);
  69
  70         if (!bond->debug_dir) {
  71                 pr_warning("%s: Warning: failed to register to debugfs\n",
  72                         bond->dev->name);
  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                 pr_warning("%s: Warning: failed to reregister, "
 101                                 "so just unregister old one\n",
 102                                 bond->dev->name);
 103                 bond_debug_unregister(bond);
 104         }
 105 }
 106
 107 void bond_create_debugfs(void)
 108 {
 109         bonding_debug_root = debugfs_create_dir("bonding", NULL);
 110
 111         if (!bonding_debug_root) {
 112                 pr_warning("Warning: Cannot create bonding directory"
 113                                 " in debugfs\n");
 114         }
 115 }
 116
 117 void bond_destroy_debugfs(void)
 118 {
 119         debugfs_remove_recursive(bonding_debug_root);
 120         bonding_debug_root = NULL;
 121 }
 122
 123
 124 #else /* !CONFIG_DEBUG_FS */
 125
 126 void bond_debug_register(struct bonding *bond)
 127 {
 128 }
 129
 130 void bond_debug_unregister(struct bonding *bond)
 131 {
 132 }
 133
 134 void bond_debug_reregister(struct bonding *bond)
 135 {
 136 }
 137
 138 void bond_create_debugfs(void)
 139 {
 140 }
 141
 142 void bond_destroy_debugfs(void)
 143 {
 144 }
 145
 146 #endif /* CONFIG_DEBUG_FS */