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
   8 #ifdef CONFIG_DEBUG_FS
   9
  10 #include <linux/debugfs.h>
  11 #include <linux/seq_file.h>
  12
  13 static struct dentry *bonding_debug_root;
  14
  15 void bond_debug_register(struct bonding *bond)
  16 {
  17         if (!bonding_debug_root)
  18                 return;
  19
  20         bond->debug_dir =
  21                 debugfs_create_dir(bond->dev->name, bonding_debug_root);
  22
  23         if (!bond->debug_dir) {
  24                 pr_warning("%s: Warning: failed to register to debugfs\n",
  25                         bond->dev->name);
  26                 return;
  27         }
  28 }
  29
  30 void bond_debug_unregister(struct bonding *bond)
  31 {
  32         if (!bonding_debug_root)
  33                 return;
  34
  35         debugfs_remove_recursive(bond->debug_dir);
  36 }
  37
  38 void bond_debug_reregister(struct bonding *bond)
  39 {
  40         struct dentry *d;
  41
  42         if (!bonding_debug_root)
  43                 return;
  44
  45         d = debugfs_rename(bonding_debug_root, bond->debug_dir,
  46                            bonding_debug_root, bond->dev->name);
  47         if (d) {
  48                 bond->debug_dir = d;
  49         } else {
  50                 pr_warning("%s: Warning: failed to reregister, "
  51                                 "so just unregister old one\n",
  52                                 bond->dev->name);
  53                 bond_debug_unregister(bond);
  54         }
  55 }
  56
  57 void bond_create_debugfs(void)
  58 {
  59         bonding_debug_root = debugfs_create_dir("bonding", NULL);
  60
  61         if (!bonding_debug_root) {
  62                 pr_warning("Warning: Cannot create bonding directory"
  63                                 " in debugfs\n");
  64         }
  65 }
  66
  67 void bond_destroy_debugfs(void)
  68 {
  69         debugfs_remove_recursive(bonding_debug_root);
  70         bonding_debug_root = NULL;
  71 }
  72
  73
  74 #else /* !CONFIG_DEBUG_FS */
  75
  76 void bond_debug_register(struct bonding *bond)
  77 {
  78 }
  79
  80 void bond_debug_unregister(struct bonding *bond)
  81 {
  82 }
  83
  84 void bond_debug_reregister(struct bonding *bond)
  85 {
  86 }
  87
  88 void bond_create_debugfs(void)
  89 {
  90 }
  91
  92 void bond_destroy_debugfs(void)
  93 {
  94 }
  95
  96 #endif /* CONFIG_DEBUG_FS */