netdev - Re: [PATCH 3/3] bonding: add the debugfs interface to see RLB hash table

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4D05A96B.7020902@jp.fujitsu.com>
Date:	Mon, 13 Dec 2010 14:04:43 +0900
From:	Taku Izumi <izumi.taku@...fujitsu.com>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Jay Vosburgh <fubar@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>
CC:	eric.dumazet@...il.com, shemminger@...tta.com
Subject: Re: [PATCH 3/3] 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: Taku Izumi <izumi.taku@...fujitsu.com>
Signed-off-by: Jay Vosburgh <fubar@...ibm.com>

---
 drivers/net/bonding/bond_debugfs.c |   50 +++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

Index: net-next/drivers/net/bonding/bond_debugfs.c
===================================================================
--- net-next.orig/drivers/net/bonding/bond_debugfs.c
+++ net-next/drivers/net/bonding/bond_debugfs.c
@@ -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->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)


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html