From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/net/bonding/bond_debugfs.c | 141 +++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 drivers/net/bonding/bond_debugfs.c

(limited to 'drivers/net/bonding/bond_debugfs.c')

diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
new file mode 100644
index 000000000..e52e25a97
--- /dev/null
+++ b/drivers/net/bonding/bond_debugfs.c
@@ -0,0 +1,141 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+
+#include <net/bonding.h>
+#include <net/bond_alb.h>
+
+#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_NET_NS)
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+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_MODE(bond) != BOND_MODE_ALB)
+		return 0;
+
+	seq_printf(m, "SourceIP        DestinationIP   "
+			"Destination MAC   DEV\n");
+
+	spin_lock_bh(&bond->mode_lock);
+
+	hash_index = bond_info->rx_hashtbl_used_head;
+	for (; hash_index != RLB_NULL_INDEX;
+	     hash_index = client_info->used_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->mode_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)
+		return;
+
+	bond->debug_dir =
+		debugfs_create_dir(bond->dev->name, bonding_debug_root);
+
+	if (!bond->debug_dir) {
+		netdev_warn(bond->dev, "failed to register to debugfs\n");
+		return;
+	}
+
+	debugfs_create_file("rlb_hash_table", 0400, bond->debug_dir,
+				bond, &bond_debug_rlb_hash_fops);
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+	if (!bonding_debug_root)
+		return;
+
+	debugfs_remove_recursive(bond->debug_dir);
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+	struct dentry *d;
+
+	if (!bonding_debug_root)
+		return;
+
+	d = debugfs_rename(bonding_debug_root, bond->debug_dir,
+			   bonding_debug_root, bond->dev->name);
+	if (d) {
+		bond->debug_dir = d;
+	} else {
+		netdev_warn(bond->dev, "failed to reregister, so just unregister old one\n");
+		bond_debug_unregister(bond);
+	}
+}
+
+void bond_create_debugfs(void)
+{
+	bonding_debug_root = debugfs_create_dir("bonding", NULL);
+
+	if (!bonding_debug_root) {
+		pr_warn("Warning: Cannot create bonding directory in debugfs\n");
+	}
+}
+
+void bond_destroy_debugfs(void)
+{
+	debugfs_remove_recursive(bonding_debug_root);
+	bonding_debug_root = NULL;
+}
+
+
+#else /* !CONFIG_DEBUG_FS */
+
+void bond_debug_register(struct bonding *bond)
+{
+}
+
+void bond_debug_unregister(struct bonding *bond)
+{
+}
+
+void bond_debug_reregister(struct bonding *bond)
+{
+}
+
+void bond_create_debugfs(void)
+{
+}
+
+void bond_destroy_debugfs(void)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
-- 
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