linux-kernel - Re: [PATCH v6 4/7] xfs: Support FS_XFLAG

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Message-ID: <06344e9f-a625-4f6e-8b23-329ee8ebf67f@oracle.com>
Date: Thu, 3 Oct 2024 13:48:41 +0100
From: John Garry <john.g.garry@...cle.com>
To: axboe@...nel.dk, brauner@...nel.org, djwong@...nel.org,
        viro@...iv.linux.org.uk, jack@...e.cz, dchinner@...hat.com, hch@....de,
        cem@...nel.org
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org, hare@...e.de,
        martin.petersen@...cle.com, catherine.hoang@...cle.com,
        mcgrof@...nel.org, ritesh.list@...il.com, ojaswin@...ux.ibm.com
Subject: Re: [PATCH v6 4/7] xfs: Support FS_XFLAG_ATOMICWRITES

On 30/09/2024 13:54, John Garry wrote:
> @@ -352,11 +352,15 @@ xfs_sb_has_compat_feature(
>   #define XFS_SB_FEAT_RO_COMPAT_RMAPBT   (1 << 1)		/* reverse map btree */
>   #define XFS_SB_FEAT_RO_COMPAT_REFLINK  (1 << 2)		/* reflinked files */
>   #define XFS_SB_FEAT_RO_COMPAT_INOBTCNT (1 << 3)		/* inobt block counts */
> +#define XFS_SB_FEAT_RO_COMPAT_ATOMICWRITES (1 << 31)	/* atomicwrites enabled */
> +

BTW, Darrick, as you questioned previously, this does make xfs/270 
fail... until the change to a not use the top bit.

Thanks,
John