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Date: Wed, 22 Nov 2023 20:32:44 +0000
From: Al Viro <viro@zeniv.linux.org.uk>
To: Gabriel Krisman Bertazi <krisman@suse.de>
Cc: brauner@kernel.org, tytso@mit.edu, ebiggers@kernel.org,
	jaegeuk@kernel.org, linux-fsdevel@vger.kernel.org,
	linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net,
	Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: Re: [PATCH v6 4/9] fs: Add DCACHE_CASEFOLDED_NAME flag
Message-ID: <20231122203244.GG38156@ZenIV>
References: <20230816050803.15660-1-krisman@suse.de>
 <20230816050803.15660-5-krisman@suse.de>
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Sender: Al Viro <viro@ftp.linux.org.uk>

On Wed, Aug 16, 2023 at 01:07:58AM -0400, Gabriel Krisman Bertazi wrote:
> From: Gabriel Krisman Bertazi <krisman@collabora.com>
> 
> This flag marks a negative or positive dentry as being created after a
> case-insensitive lookup operation.  It is useful to differentiate
> dentries this way to detect whether the negative dentry can be trusted
> during a case-insensitive lookup.

What should happen to that flag when d_splice_alias() picks an existing
alias?  AFAICS, you set it in ->lookup() for the dentry passed to ->lookup(),
but the alias picked by that sucker won't see anything of that sort, will
it?