1 files changed, 119 insertions, 0 deletions

diff --git a/net/hsr/hsr_debugfs.c b/net/hsr/hsr_debugfs.c
new file mode 100644
index 000000000000..94447974a3c0
--- /dev/null
+++ b/net/hsr/hsr_debugfs.c
@@ -0,0 +1,119 @@
+/*
+ * hsr_debugfs code
+ * Copyright (C) 2019 Texas Instruments Incorporated
+ *
+ * Author(s):
+ *	Murali Karicheri <m-karicheri2@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/debugfs.h>
+#include "hsr_main.h"
+#include "hsr_framereg.h"
+
+static void print_mac_address(struct seq_file *sfp, unsigned char *mac)
+{
+	seq_printf(sfp, "%02x:%02x:%02x:%02x:%02x:%02x:",
+		   mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+}
+
+/* hsr_node_table_show - Formats and prints node_table entries */
+static int
+hsr_node_table_show(struct seq_file *sfp, void *data)
+{
+	struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
+	struct hsr_node *node;
+
+	seq_puts(sfp, "Node Table entries\n");
+	seq_puts(sfp, "MAC-Address-A,   MAC-Address-B, time_in[A], ");
+	seq_puts(sfp, "time_in[B], Address-B port\n");
+	rcu_read_lock();
+	list_for_each_entry_rcu(node, &priv->node_db, mac_list) {
+		/* skip self node */
+		if (hsr_addr_is_self(priv, node->macaddress_A))
+			continue;
+		print_mac_address(sfp, &node->macaddress_A[0]);
+		seq_puts(sfp, " ");
+		print_mac_address(sfp, &node->macaddress_B[0]);
+		seq_printf(sfp, "0x%lx, ", node->time_in[HSR_PT_SLAVE_A]);
+		seq_printf(sfp, "0x%lx ", node->time_in[HSR_PT_SLAVE_B]);
+		seq_printf(sfp, "0x%x\n", node->addr_B_port);
+	}
+	rcu_read_unlock();
+	return 0;
+}
+
+/* hsr_node_table_open - Open the node_table file
+ *
+ * Description:
+ * This routine opens a debugfs file node_table of specific hsr device
+ */
+static int
+hsr_node_table_open(struct inode *inode, struct file *filp)
+{
+	return single_open(filp, hsr_node_table_show, inode->i_private);
+}
+
+static const struct file_operations hsr_fops = {
+	.owner	= THIS_MODULE,
+	.open	= hsr_node_table_open,
+	.read	= seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+/* hsr_debugfs_init - create hsr node_table file for dumping
+ * the node table
+ *
+ * Description:
+ * When debugfs is configured this routine sets up the node_table file per
+ * hsr device for dumping the node_table entries
+ */
+int hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
+{
+	int rc = -1;
+	struct dentry *de = NULL;
+
+	de = debugfs_create_dir(hsr_dev->name, NULL);
+	if (!de) {
+		pr_err("Cannot create hsr debugfs root\n");
+		return rc;
+	}
+
+	priv->node_tbl_root = de;
+
+	de = debugfs_create_file("node_table", S_IFREG | 0444,
+				 priv->node_tbl_root, priv,
+				 &hsr_fops);
+	if (!de) {
+		pr_err("Cannot create hsr node_table directory\n");
+		return rc;
+	}
+	priv->node_tbl_file = de;
+
+	return 0;
+}
+
+/* hsr_debugfs_term - Tear down debugfs intrastructure
+ *
+ * Description:
+ * When Debufs is configured this routine removes debugfs file system
+ * elements that are specific to hsr
+ */
+void
+hsr_debugfs_term(struct hsr_priv *priv)
+{
+	debugfs_remove(priv->node_tbl_file);
+	priv->node_tbl_file = NULL;
+	debugfs_remove(priv->node_tbl_root);
+	priv->node_tbl_root = NULL;
+}