From: Al Viro <viro@zeniv.linux.org.uk>
To: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, kernel-team@meta.com,
andrii@kernel.org, eddyz87@gmail.com, ast@kernel.org,
daniel@iogearbox.net, martin.lau@linux.dev, brauner@kernel.org,
jack@suse.cz, kpsingh@kernel.org, mattbobrowski@google.com,
amir73il@gmail.com, repnop@google.com, jlayton@kernel.org,
josef@toxicpanda.com, mic@digikod.net, gnoack@google.com,
m@maowtm.org
Subject: Re: [PATCH v2 bpf-next 1/4] namei: Introduce new helper function path_walk_parent()
Date: Fri, 6 Jun 2025 15:40:58 +0100 [thread overview]
Message-ID: <20250606144058.GW299672@ZenIV> (raw)
In-Reply-To: <20250603065920.3404510-2-song@kernel.org>
On Mon, Jun 02, 2025 at 11:59:17PM -0700, Song Liu wrote:
> This helper walks an input path to its parent. Logic are added to handle
> walking across mount tree.
>
> This will be used by landlock, and BPF LSM.
Unless I'm misreading that, it does *NOT* walk to parent - it treats
step into mountpoint as a separate step. NAK in that form - it's
simply a wrong primitive.
next prev parent reply other threads:[~2025-06-06 14:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-03 6:59 [PATCH v2 bpf-next 0/4] bpf path iterator Song Liu
2025-06-03 6:59 ` [PATCH v2 bpf-next 1/4] namei: Introduce new helper function path_walk_parent() Song Liu
2025-06-06 11:10 ` Mickaël Salaün
2025-06-06 14:40 ` Al Viro [this message]
2025-06-06 17:01 ` Song Liu
2025-06-03 6:59 ` [PATCH v2 bpf-next 2/4] landlock: Use path_walk_parent() Song Liu
2025-06-03 13:46 ` Mickaël Salaün
2025-06-04 19:37 ` Song Liu
2025-06-05 16:47 ` Song Liu
2025-06-06 10:46 ` Mickaël Salaün
2025-06-03 6:59 ` [PATCH v2 bpf-next 3/4] bpf: Introduce path iterator Song Liu
2025-06-03 15:13 ` Alexei Starovoitov
2025-06-04 17:22 ` Christian Brauner
2025-06-03 18:40 ` Andrii Nakryiko
2025-06-03 20:49 ` Yonghong Song
2025-06-03 21:10 ` Song Liu
2025-06-03 21:09 ` Song Liu
2025-06-03 21:44 ` Andrii Nakryiko
2025-06-03 23:20 ` Song Liu
2025-06-04 20:37 ` Andrii Nakryiko
2025-06-05 19:27 ` Matt Bobrowski
2025-06-05 21:14 ` Song Liu
2025-06-03 6:59 ` [PATCH v2 bpf-next 4/4] selftests/bpf: Add tests for bpf " Song Liu
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