forked from mirrors/linux
5a10562bde
$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@efficientek.com Signed-off-by: Glenn Washburn <development@efficientek.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Antonio Borneo <antonio.borneo@foss.st.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
#
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# gdb helper commands and functions for Linux kernel debugging
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#
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# VFS tools
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#
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# Copyright (c) 2023 Glenn Washburn
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# Copyright (c) 2016 Linaro Ltd
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#
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# Authors:
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# Glenn Washburn <development@efficientek.com>
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# Kieran Bingham <kieran.bingham@linaro.org>
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#
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# This work is licensed under the terms of the GNU GPL version 2.
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#
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import gdb
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from linux import utils
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def dentry_name(d):
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parent = d['d_parent']
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if parent == d or parent == 0:
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return ""
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p = dentry_name(d['d_parent']) + "/"
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return p + d['d_iname'].string()
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class DentryName(gdb.Function):
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"""Return string of the full path of a dentry.
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$lx_dentry_name(PTR): Given PTR to a dentry struct, return a string
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of the full path of the dentry."""
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def __init__(self):
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super(DentryName, self).__init__("lx_dentry_name")
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def invoke(self, dentry_ptr):
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return dentry_name(dentry_ptr)
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DentryName()
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dentry_type = utils.CachedType("struct dentry")
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class InodeDentry(gdb.Function):
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"""Return dentry pointer for inode.
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$lx_i_dentry(PTR): Given PTR to an inode struct, return a pointer to
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the associated dentry struct, if there is one."""
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def __init__(self):
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super(InodeDentry, self).__init__("lx_i_dentry")
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def invoke(self, inode_ptr):
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d_u = inode_ptr["i_dentry"]["first"]
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if d_u == 0:
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return ""
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return utils.container_of(d_u, dentry_type.get_type().pointer(), "d_u")
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InodeDentry()
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