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Commit caafa842 authored by Taku Izumi's avatar Taku Izumi Committed by David S. Miller
Browse files

bonding: add the debugfs interface to see RLB hash table 



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: default avatarTaku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: default avatarJay Vosburgh <fubar@us.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 411204a5

drivers/net/bonding/bond_debugfs.c

+50 −0
Original line number Diff line number Diff line
@@ -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)