linux-kernel - Re: [PATCH v3 bpf-next 2/5] landlock: Use path_walk

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Message-ID: <7e457120-6c9e-4318-9f92-e794223bfce6@maowtm.org>
Date: Sun, 8 Jun 2025 19:45:12 +0100
From: Tingmao Wang <m@...wtm.org>
To: Song Liu <song@...nel.org>, Mickaël Salaün
 <mic@...ikod.net>
Cc: bpf@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org,
 kernel-team@...a.com, andrii@...nel.org, eddyz87@...il.com, ast@...nel.org,
 daniel@...earbox.net, martin.lau@...ux.dev, viro@...iv.linux.org.uk,
 brauner@...nel.org, jack@...e.cz, kpsingh@...nel.org,
 mattbobrowski@...gle.com, amir73il@...il.com, repnop@...gle.com,
 jlayton@...nel.org, josef@...icpanda.com, gnoack@...gle.com
Subject: Re: [PATCH v3 bpf-next 2/5] landlock: Use path_walk_parent()

On 6/6/25 22:30, Song Liu wrote:
> Use path_walk_parent() to walk a path up to its parent.
> 
> No functional changes intended.
> 
> Signed-off-by: Song Liu <song@...nel.org>

There is also path walk code in collect_domain_accesses even though that
one doesn't walk pass mount points.  Not sure if that one should be
updated to use this helper as well, or maybe fine to keep using
dget_parent.