linux-ext4 - Re: [PATCH v2 1/7] fs: Expose name under lookup to d

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Date:   Thu, 13 Jul 2023 21:40:27 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Gabriel Krisman Bertazi <krisman@...e.de>
Cc:     viro@...iv.linux.org.uk, brauner@...nel.org, tytso@....edu,
        jaegeuk@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH v2 1/7] fs: Expose name under lookup to d_revalidate hook

Hi Gabriel,

On Fri, Apr 21, 2023 at 08:03:04PM -0400, Gabriel Krisman Bertazi wrote:
> From: Gabriel Krisman Bertazi <krisman@...labora.com>
> 
> Negative dentries support on case-insensitive ext4/f2fs will require
> access to the name under lookup to ensure it matches the dentry.  This
> adds an optional new flavor of cached dentry revalidation hook to expose
> this extra parameter.
> 
> I'm fine with extending d_revalidate instead of adding a new hook, if
> it is considered cleaner and the approach is accepted.  I wrote a new
> hook to simplify reviewing.
> 
> Reviewed-by: Theodore Ts'o <tytso@....edu>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.com>
> ---
>  fs/dcache.c            |  2 +-
>  fs/namei.c             | 23 ++++++++++++++---------
>  include/linux/dcache.h |  1 +
>  3 files changed, 16 insertions(+), 10 deletions(-)

Documentation/filesystems/vfs.rst and Documentation/filesystems/locking.rst need
to be updated to document d_revalidate_name.

- Eric