lkml.org 
[lkml]   [2017]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch 58/60] x86/mm/debug_pagetables: Add page table directory
From: Borislav Petkov <bp@suse.de>

The upcoming support for dumping the kernel and the user space page tables
of the current process would create more random files in the top level
debugfs directory.

Add a page table directory and move the existing file to it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
arch/x86/mm/debug_pagetables.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)

--- a/arch/x86/mm/debug_pagetables.c
+++ b/arch/x86/mm/debug_pagetables.c
@@ -22,21 +22,26 @@ static const struct file_operations ptdu
.release = single_release,
};

-static struct dentry *pe;
+static struct dentry *dir, *pe;

static int __init pt_dump_debug_init(void)
{
- pe = debugfs_create_file("kernel_page_tables", S_IRUSR, NULL, NULL,
- &ptdump_fops);
- if (!pe)
+ dir = debugfs_create_dir("page_tables", NULL);
+ if (!dir)
return -ENOMEM;

+ pe = debugfs_create_file("kernel", 0400, dir, NULL, &ptdump_fops);
+ if (!pe)
+ goto err;
return 0;
+err:
+ debugfs_remove_recursive(dir);
+ return -ENOMEM;
}

static void __exit pt_dump_debug_exit(void)
{
- debugfs_remove_recursive(pe);
+ debugfs_remove_recursive(dir);
}

module_init(pt_dump_debug_init);

\
 
 \ /
  Last update: 2017-12-04 17:57    [W:0.329 / U:1.284 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site