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134 lines
3.7 KiB
134 lines
3.7 KiB
/* |
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* debugfs code for HSR & PRP |
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* Copyright (C) 2019 Texas Instruments Incorporated |
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* |
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* Author(s): |
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* Murali Karicheri <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation version 2. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/errno.h> |
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#include <linux/debugfs.h> |
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#include "hsr_main.h" |
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#include "hsr_framereg.h" |
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static struct dentry *hsr_debugfs_root_dir; |
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/* hsr_node_table_show - Formats and prints node_table entries */ |
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static int |
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hsr_node_table_show(struct seq_file *sfp, void *data) |
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{ |
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struct hsr_priv *priv = (struct hsr_priv *)sfp->private; |
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struct hsr_node *node; |
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seq_printf(sfp, "Node Table entries for (%s) device\n", |
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(priv->prot_version == PRP_V1 ? "PRP" : "HSR")); |
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seq_puts(sfp, "MAC-Address-A, MAC-Address-B, time_in[A], "); |
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seq_puts(sfp, "time_in[B], Address-B port, "); |
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if (priv->prot_version == PRP_V1) |
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seq_puts(sfp, "SAN-A, SAN-B, DAN-P\n"); |
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else |
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seq_puts(sfp, "DAN-H\n"); |
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rcu_read_lock(); |
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list_for_each_entry_rcu(node, &priv->node_db, mac_list) { |
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/* skip self node */ |
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if (hsr_addr_is_self(priv, node->macaddress_A)) |
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continue; |
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seq_printf(sfp, "%pM ", &node->macaddress_A[0]); |
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seq_printf(sfp, "%pM ", &node->macaddress_B[0]); |
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seq_printf(sfp, "%10lx, ", node->time_in[HSR_PT_SLAVE_A]); |
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seq_printf(sfp, "%10lx, ", node->time_in[HSR_PT_SLAVE_B]); |
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seq_printf(sfp, "%14x, ", node->addr_B_port); |
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if (priv->prot_version == PRP_V1) |
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seq_printf(sfp, "%5x, %5x, %5x\n", |
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node->san_a, node->san_b, |
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(node->san_a == 0 && node->san_b == 0)); |
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else |
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seq_printf(sfp, "%5x\n", 1); |
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} |
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rcu_read_unlock(); |
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return 0; |
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} |
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DEFINE_SHOW_ATTRIBUTE(hsr_node_table); |
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void hsr_debugfs_rename(struct net_device *dev) |
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{ |
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struct hsr_priv *priv = netdev_priv(dev); |
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struct dentry *d; |
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d = debugfs_rename(hsr_debugfs_root_dir, priv->node_tbl_root, |
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hsr_debugfs_root_dir, dev->name); |
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if (IS_ERR(d)) |
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netdev_warn(dev, "failed to rename\n"); |
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else |
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priv->node_tbl_root = d; |
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} |
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/* hsr_debugfs_init - create hsr node_table file for dumping |
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* the node table |
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* |
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* Description: |
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* When debugfs is configured this routine sets up the node_table file per |
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* hsr device for dumping the node_table entries |
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*/ |
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void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev) |
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{ |
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struct dentry *de = NULL; |
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de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir); |
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if (IS_ERR(de)) { |
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pr_err("Cannot create hsr debugfs directory\n"); |
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return; |
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} |
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priv->node_tbl_root = de; |
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de = debugfs_create_file("node_table", S_IFREG | 0444, |
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priv->node_tbl_root, priv, |
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&hsr_node_table_fops); |
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if (IS_ERR(de)) { |
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pr_err("Cannot create hsr node_table file\n"); |
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debugfs_remove(priv->node_tbl_root); |
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priv->node_tbl_root = NULL; |
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return; |
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} |
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} |
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/* hsr_debugfs_term - Tear down debugfs intrastructure |
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* |
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* Description: |
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* When Debufs is configured this routine removes debugfs file system |
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* elements that are specific to hsr |
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*/ |
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void |
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hsr_debugfs_term(struct hsr_priv *priv) |
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{ |
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debugfs_remove_recursive(priv->node_tbl_root); |
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priv->node_tbl_root = NULL; |
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} |
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void hsr_debugfs_create_root(void) |
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{ |
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hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL); |
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if (IS_ERR(hsr_debugfs_root_dir)) { |
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pr_err("Cannot create hsr debugfs root directory\n"); |
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hsr_debugfs_root_dir = NULL; |
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} |
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} |
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void hsr_debugfs_remove_root(void) |
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{ |
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/* debugfs_remove() internally checks NULL and ERROR */ |
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debugfs_remove(hsr_debugfs_root_dir); |
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}
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