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bonding: add the debugfs interface to see RLB hash table

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This patch provices the debugfs interface to see RLB hash table
like the following:

# cat /sys/kernel/debug/bonding/bond0/rlb_hash_table
SourceIP        DestinationIP   Destination MAC   DEV
10.124.196.205  10.124.196.205  ff:ff:ff:ff:ff:ff eth4
10.124.196.205  10.124.196.81   00:19:99:XX:XX:XX eth3
10.124.196.205  10.124.196.1    00:21:d8:XX:XX:XX eth0

This is helpful to check if the receive load balancing works as expected.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taku Izumi 2010-12-12 19:04:43 +00:00 committed by David S. Miller
parent 411204a5a1
commit caafa84251
1 changed files with 50 additions and 0 deletions
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50
drivers/net/bonding/bond_debugfs.c
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@ -4,6 +4,7 @@
#include <linux/netdevice.h>
#include "bonding.h"
#include "bond_alb.h"
#ifdef CONFIG_DEBUG_FS
@ -12,6 +13,52 @@
static struct dentry *bonding_debug_root;
/*
* Show RLB hash table
*/
static int bond_debug_rlb_hash_show(struct seq_file *m, void *v)
{
struct bonding *bond = m->private;
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
struct rlb_client_info *client_info;
u32 hash_index;
if (bond->params.mode != BOND_MODE_ALB)
return 0;
seq_printf(m, "SourceIP DestinationIP "
"Destination MAC DEV\n");
spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
hash_index = bond_info->rx_hashtbl_head;
for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) {
client_info = &(bond_info->rx_hashtbl[hash_index]);
seq_printf(m, "%-15pI4 %-15pI4 %-17pM %s\n",
&client_info->ip_src,
&client_info->ip_dst,
&client_info->mac_dst,
client_info->slave->dev->name);
}
spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock));
return 0;
}
static int bond_debug_rlb_hash_open(struct inode *inode, struct file *file)
{
return single_open(file, bond_debug_rlb_hash_show, inode->i_private);
}
static const struct file_operations bond_debug_rlb_hash_fops = {
.owner = THIS_MODULE,
.open = bond_debug_rlb_hash_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void bond_debug_register(struct bonding *bond)
{
if (!bonding_debug_root)
@ -25,6 +72,9 @@ void bond_debug_register(struct bonding *bond)
bond->dev->name);
return;
}
debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
bond, &bond_debug_rlb_hash_fops);
}
void bond_debug_unregister(struct bonding *bond)