linux-kernel - [PATCH] scripts: gdb: vfs: Support external dentry names

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Message-ID: <20250629003811.2420418-1-illia@yshyn.com>
Date: Sun, 29 Jun 2025 02:38:11 +0200
From: Illia Ostapyshyn <illia@...yn.com>
To: linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Cc: Jan Kiszka <jan.kiszka@...mens.com>,
	Kieran Bingham <kbingham@...nel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Jan Kara <jack@...e.cz>,
	Christian Brauner <brauner@...nel.org>,
	Illia Ostapyshyn <illia@...yn.com>
Subject: [PATCH] scripts: gdb: vfs: Support external dentry names

d_shortname of struct dentry only reserves D_NAME_INLINE_LEN characters
and contains garbage for longer names.  Use d_name instead, which always
references the valid name.

Link: https://lore.kernel.org/all/20250525213709.878287-2-illia@yshyn.com/
Fixes: 79300ac805b672a84b64 ("scripts/gdb: fix dentry_name() lookup")
Signed-off-by: Illia Ostapyshyn <illia@...yn.com>
---
 scripts/gdb/linux/vfs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/gdb/linux/vfs.py b/scripts/gdb/linux/vfs.py
index b5fbb18ccb77..9e921b645a68 100644
--- a/scripts/gdb/linux/vfs.py
+++ b/scripts/gdb/linux/vfs.py
@@ -22,7 +22,7 @@ def dentry_name(d):
     if parent == d or parent == 0:
         return ""
     p = dentry_name(d['d_parent']) + "/"
-    return p + d['d_shortname']['string'].string()
+    return p + d['d_name']['name'].string()
 
 class DentryName(gdb.Function):
     """Return string of the full path of a dentry.

base-commit: dfba48a70cb68888efb494c9642502efe73614ed
-- 
2.49.0