linux-kernel - Re: [PATCH] autofs: add per dentry expire timeout

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Message-ID: <20240814054552.GR13701@ZenIV>
Date: Wed, 14 Aug 2024 06:45:52 +0100
From: Al Viro <viro@...iv.linux.org.uk>
To: Ian Kent <raven@...maw.net>
Cc: Christian Brauner <brauner@...nel.org>,
	autofs mailing list <autofs@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] autofs: add per dentry expire timeout

On Wed, Aug 14, 2024 at 11:50:37AM +0800, Ian Kent wrote:

> +		inode_lock_shared(inode);
> +		dentry = try_lookup_one_len(param->path, base, path_len);
> +		inode_unlock_shared(inode);
> +		if (!dentry)
> +			return -ENOENT;
> +		ino = autofs_dentry_ino(dentry);

Why can't we get ERR_PTR(...) from try_lookup_one_len() here?