linux-ext4 - Re: [PATCH 09/28] ext4: extended attribute value size limit is enforced by vfs

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Date:   Wed, 31 May 2017 09:03:53 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Tahsin Erdogan <tahsin@...gle.com>
Cc:     Jan Kara <jack@...e.com>, "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Dave Kleikamp <shaggy@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Mark Fasheh <mfasheh@...sity.com>,
        Joel Becker <jlbec@...lplan.org>, Jens Axboe <axboe@...com>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Mike Christie <mchristi@...hat.com>,
        Fabian Frederick <fabf@...net.be>, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org, jfs-discussion@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, ocfs2-devel@....oracle.com,
        reiserfs-devel@...r.kernel.org
Subject: Re: [PATCH 09/28] ext4: extended attribute value size limit is
 enforced by vfs

On Wed, May 31, 2017 at 01:14:58AM -0700, Tahsin Erdogan wrote:
> EXT4_XATTR_MAX_LARGE_EA_SIZE definition in ext4 is currently unused.
> Besides, vfs enforces its own 64k limit which makes the 1MB limit in
> ext4 redundant. Remove it.
> 
> Signed-off-by: Tahsin Erdogan <tahsin@...gle.com>
> ---
>  fs/ext4/ext4.h | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
> index 5d5fc0d0e2bc..2cdd6070e348 100644
> --- a/fs/ext4/ext4.h
> +++ b/fs/ext4/ext4.h
> @@ -2221,12 +2221,6 @@ struct mmpd_data {
>  #define EXT4_MMP_MAX_CHECK_INTERVAL	300UL
>  
>  /*
> - * Maximum size of xattr attributes for FEATURE_INCOMPAT_EA_INODE 1Mb
> - * This limit is arbitrary, but is reasonable for the xattr API.
> - */
> -#define EXT4_XATTR_MAX_LARGE_EA_SIZE    (1024 * 1024)

Uhhh... didn't you add this in patch 1/28?  There's little point in
adding a symbol just to delete it shortly thereafter.

--D

> -
> -/*
>   * Function prototypes
>   */
>  
> -- 
> 2.13.0.219.gdb65acc882-goog
>