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#
# gdb helper commands and functions for Linux kernel debugging
#
# VFS tools
#
# Copyright (c) 2023 Glenn Washburn
# Copyright (c) 2016 Linaro Ltd
#
# Authors:
# Glenn Washburn <[email protected]>
# Kieran Bingham <[email protected]>
#
# 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']
if parent == d or parent == 0:
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()
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