The patch titled
Subject: scripts/gdb: add GDB convenience functions $lx_dentry_name() and $lx_i_dentry()
has been added to the -mm mm-nonmm-unstable branch. Its filename is
scripts-gdb-add-gdb-convenience-functions-lx_dentry_name-and-lx_i_dentry.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-gdb-add-gdb-convenience-functions-lx_dentry_name-and-lx_i_dentry.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Glenn Washburn <development@xxxxxxxxxxxxxxx>
Subject: scripts/gdb: add GDB convenience functions $lx_dentry_name() and $lx_i_dentry()
Date: Tue, 28 Feb 2023 18:53:35 -0600
$lx_dentry_name() generates a full VFS path from a given dentry pointer,
and $lx_i_dentry() returns the dentry pointer associated with the given
inode pointer, if there is one.
Link: https://lkml.kernel.org/r/c9a5ad8efbfbd2cc6559e082734eed7628f43a16.1677631565.git.development@xxxxxxxxxxxxxxx
Signed-off-by: Glenn Washburn <development@xxxxxxxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Antonio Borneo <antonio.borneo@xxxxxxxxxxx>
Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Cc: John Ogness <john.ogness@xxxxxxxxxxxxx>
Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gdb/linux/vfs.py | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
--- a/scripts/gdb/linux/vfs.py~scripts-gdb-add-gdb-convenience-functions-lx_dentry_name-and-lx_i_dentry
+++ a/scripts/gdb/linux/vfs.py
@@ -13,6 +13,9 @@
# This work is licensed under the terms of the GNU GPL version 2.
#
+import gdb
+from linux import utils
+
def dentry_name(d):
parent = d['d_parent']
@@ -20,3 +23,37 @@ def dentry_name(d):
return ""
p = dentry_name(d['d_parent']) + "/"
return p + d['d_iname'].string()
+
+class DentryName(gdb.Function):
+ """Return string of the full path of a dentry.
+
+$lx_dentry_name(PTR): Given PTR to a dentry struct, return a string
+of the full path of the dentry."""
+
+ def __init__(self):
+ super(DentryName, self).__init__("lx_dentry_name")
+
+ def invoke(self, dentry_ptr):
+ return dentry_name(dentry_ptr)
+
+DentryName()
+
+
+dentry_type = utils.CachedType("struct dentry")
+
+class InodeDentry(gdb.Function):
+ """Return dentry pointer for inode.
+
+$lx_i_dentry(PTR): Given PTR to an inode struct, return a pointer to
+the associated dentry struct, if there is one."""
+
+ def __init__(self):
+ super(InodeDentry, self).__init__("lx_i_dentry")
+
+ def invoke(self, inode_ptr):
+ d_u = inode_ptr["i_dentry"]["first"]
+ if d_u == 0:
+ return ""
+ return utils.container_of(d_u, dentry_type.get_type().pointer(), "d_u")
+
+InodeDentry()
_
Patches currently in -mm which might be from development@xxxxxxxxxxxxxxx are
scripts-gdb-create-linux-vfspy-for-vfs-related-gdb-helpers.patch
scripts-gdb-add-gdb-convenience-functions-lx_dentry_name-and-lx_i_dentry.patch
