linux-kernel - [PATCH] debugfs: make error message a bit more verbose

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Message-ID: <20190706154256.GA2683@kroah.com>
Date:   Sat, 6 Jul 2019 17:42:56 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.de>
Subject: [PATCH] debugfs: make error message a bit more verbose

When a file/directory is already present in debugfs, and it is attempted
to be created again, be more specific about what file/directory is being
created and where it is trying to be created to give a bit more help to
developers to figure out the problem.

Cc: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/debugfs/inode.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 7f43c8acfcbf..5836312269e0 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -311,8 +311,13 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
 	inode_lock(d_inode(parent));
 	dentry = lookup_one_len(name, parent, strlen(name));
 	if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {
+		if (d_is_dir(dentry))
+			pr_err("Directory '%s' with parent '%s' already present!\n",
+			       name, parent->d_name.name);
+		else
+			pr_err("File '%s' in directory '%s' already present!\n",
+			       name, parent->d_name.name);
 		dput(dentry);
-		pr_err("File '%s' already present!\n", name);
 		dentry = ERR_PTR(-EEXIST);
 	}
 
-- 
2.22.0