LXR linux/drivers/net/bonding/bond

   1#include <linux/kernel.h>
   2#include <linux/module.h>
   3#include <linux/device.h>
   4#include <linux/netdevice.h>
   5
   6#include <net/bonding.h>
   7#include <net/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
  14static struct dentry *bonding_debug_root;
  15
  16/* Show RLB hash table */
  17static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
  18{
  19        struct bonding *bond = m->private;
  20        struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
  21        struct rlb_client_info *client_info;
  22        u32 hash_index;
  23
  24        if (BOND_MODE(bond) != BOND_MODE_ALB)
  25                return 0;
  26
  27        seq_printf(m, "SourceIP        DestinationIP   "
  28                        "Destination MAC   DEV\n");
  29
  30        spin_lock_bh(&bond->mode_lock);
  31
  32        hash_index = bond_info->rx_hashtbl_used_head;
  33        for (; hash_index != RLB_NULL_INDEX;
  34             hash_index = client_info->used_next) {
  35                client_info = &(bond_info->rx_hashtbl[hash_index]);
  36                seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
  37                        &client_info->ip_src,
  38                        &client_info->ip_dst,
  39                        &client_info->mac_dst,
  40                        client_info->slave->dev->name);
  41        }
  42
  43        spin_unlock_bh(&bond->mode_lock);
  44
  45        return 0;
  46}
  47
  48static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
  49{
  50        return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
  51}
  52
  53static const struct file_operations bond_debug_rlb_hash_fops = {
  54        .owner          = THIS_MODULE,
  55        .open           = bond_debug_rlb_hash_open,
  56        .read           = seq_read,
  57        .llseek         = seq_lseek,
  58        .release        = single_release,
  59};
  60
  61void bond_debug_register(struct bonding *bond)
  62{
  63        if (!bonding_debug_root)
  64                return;
  65
  66        bond->debug_dir =
  67                debugfs_create_dir(bond->dev->name, bonding_debug_root);
  68
  69        if (!bond->debug_dir) {
  70                netdev_warn(bond->dev, "failed to register to debugfs\n");
  71                return;
  72        }
  73
  74        debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
  75                                bond, &bond_debug_rlb_hash_fops);
  76}
  77
  78void bond_debug_unregister(struct bonding *bond)
  79{
  80        if (!bonding_debug_root)
  81                return;
  82
  83        debugfs_remove_recursive(bond->debug_dir);
  84}
  85
  86void bond_debug_reregister(struct bonding *bond)
  87{
  88        struct dentry *d;
  89
  90        if (!bonding_debug_root)
  91                return;
  92
  93        d = debugfs_rename(bonding_debug_root, bond->debug_dir,
  94                           bonding_debug_root, bond->dev->name);
  95        if (d) {
  96                bond->debug_dir = d;
  97        } else {
  98                netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
  99                bond_debug_unregister(bond);
 100        }
 101}
 102
 103void bond_create_debugfs(void)
 104{
 105        bonding_debug_root = debugfs_create_dir("bonding", NULL);
 106
 107        if (!bonding_debug_root) {
 108                pr_warn("Warning: Cannot create bonding directory in debugfs\n");
 109        }
 110}
 111
 112void bond_destroy_debugfs(void)
 113{
 114        debugfs_remove_recursive(bonding_debug_root);
 115        bonding_debug_root = NULL;
 116}
 117
 118
 119#else /* !CONFIG_DEBUG_FS */
 120
 121void bond_debug_register(struct bonding *bond)
 122{
 123}
 124
 125void bond_debug_unregister(struct bonding *bond)
 126{
 127}
 128
 129void bond_debug_reregister(struct bonding *bond)
 130{
 131}
 132
 133void bond_create_debugfs(void)
 134{
 135}
 136
 137void bond_destroy_debugfs(void)
 138{
 139}
 140
 141#endif /* CONFIG_DEBUG_FS */
 142