From: Jan Kara <jack@suse.cz>
To: ira.weiny@intel.com
Cc: linux-kernel@vger.kernel.org, Jan Kara <jack@suse.cz>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Dan Williams <dan.j.williams@intel.com>,
Dave Chinner <david@fromorbit.com>,
Christoph Hellwig <hch@lst.de>,
"Theodore Y. Ts'o" <tytso@mit.edu>,
Jeff Moyer <jmoyer@redhat.com>,
linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH RFC 2/8] fs/ext4: Disallow verity if inode is DAX
Date: Wed, 15 Apr 2020 13:58:07 +0200 [thread overview]
Message-ID: <20200415115807.GD6126@quack2.suse.cz> (raw)
In-Reply-To: <20200414040030.1802884-3-ira.weiny@intel.com>
On Mon 13-04-20 21:00:24, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
>
> Verity and DAX are incompatible. Changing the DAX mode due to a verity
> flag change is wrong without a corresponding address_space_operations
> update.
>
> Make the 2 options mutually exclusive by returning an error if DAX was
> set first.
>
> (Setting DAX is already disabled if Verity is set first.)
>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Looks good to me. You can add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> fs/ext4/verity.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c
> index dc5ec724d889..ce3f9a198d3b 100644
> --- a/fs/ext4/verity.c
> +++ b/fs/ext4/verity.c
> @@ -113,6 +113,9 @@ static int ext4_begin_enable_verity(struct file *filp)
> handle_t *handle;
> int err;
>
> + if (WARN_ON_ONCE(IS_DAX(inode)))
> + return -EINVAL;
> +
> if (ext4_verity_in_progress(inode))
> return -EBUSY;
>
> --
> 2.25.1
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2020-04-15 12:06 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-14 4:00 [PATCH RFC 0/8] Enable ext4 support for per-file/directory DAX operations ira.weiny
2020-04-14 4:00 ` [PATCH RFC 1/8] fs/ext4: Narrow scope of DAX check in setflags ira.weiny
2020-04-15 11:45 ` Jan Kara
2020-04-14 4:00 ` [PATCH RFC 2/8] fs/ext4: Disallow verity if inode is DAX ira.weiny
2020-04-15 11:58 ` Jan Kara [this message]
2020-04-15 12:00 ` Jan Kara
2020-04-15 15:55 ` Theodore Y. Ts'o
2020-04-15 19:21 ` Ira Weiny
2020-04-15 19:14 ` Ira Weiny
2020-04-16 1:29 ` Eric Biggers
2020-04-16 3:48 ` Ira Weiny
2020-04-15 20:34 ` Ira Weiny
2020-04-14 4:00 ` [PATCH RFC 3/8] fs/ext4: Disallow encryption " ira.weiny
2020-04-15 12:02 ` Jan Kara
2020-04-15 20:35 ` Ira Weiny
2020-04-15 16:03 ` Theodore Y. Ts'o
2020-04-15 17:27 ` Dan Williams
2020-04-15 19:54 ` Ira Weiny
2020-04-21 18:41 ` Ira Weiny
2020-04-21 18:56 ` Darrick J. Wong
2020-04-14 4:00 ` [PATCH RFC 4/8] fs/ext4: Introduce DAX inode flag ira.weiny
2020-04-15 12:08 ` Jan Kara
2020-04-15 20:39 ` Ira Weiny
2020-04-16 10:32 ` Jan Kara
2020-04-16 18:01 ` Theodore Y. Ts'o
2020-04-16 16:25 ` Darrick J. Wong
2020-04-16 22:33 ` Ira Weiny
2020-04-16 22:49 ` Darrick J. Wong
2020-04-17 0:37 ` Ira Weiny
2020-04-17 1:57 ` Darrick J. Wong
2020-04-17 2:20 ` Ira Weiny
2020-04-17 6:43 ` Andreas Dilger
2020-04-17 17:19 ` Ira Weiny
2020-04-14 4:00 ` [PATCH RFC 5/8] fs/ext4: Make DAX mount option a tri-state ira.weiny
2020-04-15 12:51 ` Jan Kara
2020-04-14 4:00 ` [PATCH RFC 6/8] fs/ext4: Update ext4_should_use_dax() ira.weiny
2020-04-15 13:58 ` Jan Kara
2020-04-17 17:16 ` Ira Weiny
2020-04-14 4:00 ` [PATCH RFC 7/8] fs/ext4: Only change S_DAX on inode load ira.weiny
2020-04-15 14:03 ` Jan Kara
2020-04-17 17:18 ` Ira Weiny
2020-04-14 4:00 ` [PATCH RFC 8/8] Documentation/dax: Update DAX enablement for ext4 ira.weiny
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