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hsr: add hsr root debugfs directory

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In current hsr code, when hsr interface is created, it creates debugfs
directory /sys/kernel/debug/<interface name>.
If there is same directory or file name in there, it fails.
In order to reduce possibility of failure of creation of debugfs,
this patch adds root directory.

Test commands:
    ip link add dummy0 type dummy
    ip link add dummy1 type dummy
    ip link add hsr0 type hsr slave1 dummy0 slave2 dummy1

Before this patch:
    /sys/kernel/debug/hsr0/node_table

After this patch:
    /sys/kernel/debug/hsr/hsr0/node_table

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taehee Yoo
2019-12-22 11:26:27 +00:00
committed by David S. Miller
parent 1d19e2d53e
commit c6c4ccd7f9
4 changed files with 28 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
net/hsr/hsr_debugfs.c
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@@ -20,6 +20,8 @@
#include "hsr_main.h"
#include "hsr_framereg.h"
static struct dentry *hsr_debugfs_root_dir;
static void print_mac_address(struct seq_file *sfp, unsigned char *mac)
{
seq_printf(sfp, "%02x:%02x:%02x:%02x:%02x:%02x:",
@@ -81,9 +83,9 @@ void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
{
struct dentry *de = NULL;
de = debugfs_create_dir(hsr_dev->name, NULL);
de = debugfs_create_dir(hsr_dev->name, hsr_debugfs_root_dir);
if (IS_ERR(de)) {
pr_err("Cannot create hsr debugfs root\n");
pr_err("Cannot create hsr debugfs directory\n");
return;
}
@@ -93,7 +95,7 @@ void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev)
priv->node_tbl_root, priv,
&hsr_fops);
if (IS_ERR(de)) {
pr_err("Cannot create hsr node_table directory\n");
pr_err("Cannot create hsr node_table file\n");
debugfs_remove(priv->node_tbl_root);
priv->node_tbl_root = NULL;
return;
@@ -115,3 +117,18 @@ hsr_debugfs_term(struct hsr_priv *priv)
debugfs_remove(priv->node_tbl_root);
priv->node_tbl_root = NULL;
}
void hsr_debugfs_create_root(void)
{
hsr_debugfs_root_dir = debugfs_create_dir("hsr", NULL);
if (IS_ERR(hsr_debugfs_root_dir)) {
pr_err("Cannot create hsr debugfs root directory\n");
hsr_debugfs_root_dir = NULL;
}
}
void hsr_debugfs_remove_root(void)
{
/* debugfs_remove() internally checks NULL and ERROR */
debugfs_remove(hsr_debugfs_root_dir);
}