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net: hsr: add debugfs support for display node list
This adds a debugfs interface to allow display the nodes learned by the hsr master. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| /* | ||
| * hsr_prp_debugfs code | ||
| * Copyright (C) 2017 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_prp_node_table_show - Formats and prints node_table entries */ | ||
| static int | ||
| hsr_prp_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_prp_node_table_open - Open the node_table file | ||
| * | ||
| * Description: | ||
| * This routine opens a debugfs file node_table of specific hsr device | ||
| */ | ||
| static int | ||
| hsr_prp_node_table_open(struct inode *inode, struct file *filp) | ||
| { | ||
| return single_open(filp, hsr_prp_node_table_show, inode->i_private); | ||
| } | ||
|
|
||
| static const struct file_operations hsr_prp_fops = { | ||
| .owner = THIS_MODULE, | ||
| .open = hsr_prp_node_table_open, | ||
| .read = seq_read, | ||
| .llseek = seq_lseek, | ||
| .release = single_release, | ||
| }; | ||
|
|
||
| /* hsr_prp_debugfs_init - create hsr-prp node_table file for dumping | ||
| * the node table | ||
| * | ||
| * Description: | ||
| * When debugfs is configured this routine sets up the node_table file per | ||
| * hsr/prp device for dumping the node_table entries | ||
| */ | ||
| int hsr_prp_debugfs_init(struct hsr_priv *priv) | ||
| { | ||
| int rc = -1; | ||
| struct dentry *de = NULL; | ||
|
|
||
| de = debugfs_create_dir("hsr", NULL); | ||
| if (!de) { | ||
| pr_err("Cannot create hsr-prp 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_prp_fops); | ||
| if (!de) { | ||
| pr_err("Cannot create hsr-prp node_table directory\n"); | ||
| return rc; | ||
| } | ||
| priv->node_tbl_file = de; | ||
| rc = 0; | ||
|
|
||
| return rc; | ||
| } | ||
|
|
||
| /* hsr_prp_debugfs_term - Tear down debugfs intrastructure | ||
| * | ||
| * Description: | ||
| * When Debufs is configured this routine removes debugfs file system | ||
| * elements that are specific to hsr-prp | ||
| */ | ||
| void | ||
| hsr_prp_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; | ||
| } |