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Date:   Thu, 23 Mar 2023 10:36:22 -0400
From:   "Theodore Ts'o" <tytso@mit.edu>
To:     Gabriel Krisman Bertazi <krisman@collabora.com>
Cc:     viro@zeniv.linux.org.uk, jaegeuk@kernel.org, ebiggers@kernel.org,
        linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net, kernel@collabora.com
Subject: Re: [PATCH 3/7] libfs: Validate negative dentries in
 case-insensitive directories
Message-ID: <20230323143622.GE136146@mit.edu>
References: <20220622194603.102655-1-krisman@collabora.com>
 <20220622194603.102655-4-krisman@collabora.com>
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On Wed, Jun 22, 2022 at 03:45:59PM -0400, Gabriel Krisman Bertazi wrote:
> Introduce a dentry revalidation helper to be used by case-insensitive
> filesystems to check if it is safe to reuse a negative dentry.
> 
> A negative dentry is safe to be reused on a case-insensitive lookup if
> it was created during a case-insensitive lookup and this is not a lookup
> that will instantiate a dentry. If this is a creation lookup, we also
> need to make sure the name matches sensitively the name under lookup in
> order to assure the name preserving semantics.
> 
> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

Reviewed-by: Theodore Ts'o <tytso@mit.edu>