From: Ted Ts'o <tytso@mit.edu>
To: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: "Darrick J. Wong" <djwong@us.ibm.com>,
Sunil Mushran <sunil.mushran@oracle.com>,
Martin K Petersen <martin.petersen@oracle.com>,
Greg Freemyer <greg.freemyer@gmail.com>,
Amir Goldstein <amir73il@gmail.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>, Mingming Cao <cmm@us.ibm.com>,
Joel Becker <jlbec@evilplan.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
linux-ext4@vger.kernel.org, Coly Li <colyli@gmail.com>
Subject: Re: [PATCH 13/23] ext4: Add new feature to make block group checksums use metadata_csum algorithm
Date: Mon, 13 Feb 2012 17:28:28 -0500 [thread overview]
Message-ID: <20120213222828.GF21641@thunk.org> (raw)
In-Reply-To: <8ED6E1F9-DB56-4D31-BCA8-2A3A8D514BD5@dilger.ca>
On Mon, Feb 13, 2012 at 02:40:26PM -0700, Andreas Dilger wrote:
>
> If a kernel understands METADATA_CSUM, it will check this first and
> ignore whether GDT_CSUM is set or not (though it shouldn't ever be
> set at the same time). Either of these features will cause an older
> kernel to mount the filesystem read-only, which is all that is needed.
... note that when we check for the uninit bits, this will have to be
done if GDT_CSUM || METADATA_CSUM are set.
- Ted
next prev parent reply other threads:[~2012-02-13 22:28 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-07 8:27 [PATCH v2.3 00/23] ext4: Add metadata checksumming Darrick J. Wong
2012-01-07 8:27 ` [PATCH 01/23] ext4: Create a new BH_Verified flag to avoid unnecessary metadata validation Darrick J. Wong
2012-01-07 8:28 ` [PATCH 02/23] ext4: Change on-disk layout to support extended metadata checksumming Darrick J. Wong
2012-01-07 8:28 ` [PATCH 03/23] ext4: Record the checksum algorithm in use in the superblock Darrick J. Wong
2012-01-07 8:28 ` [PATCH 04/23] ext4: Only call out to crc32c if necessary Darrick J. Wong
2012-01-07 8:28 ` [PATCH 05/23] ext4: Calculate and verify superblock checksum Darrick J. Wong
2012-01-07 8:28 ` [PATCH 06/23] ext4: Calculate and verify inode checksums Darrick J. Wong
2012-01-07 8:28 ` [PATCH 07/23] ext4: Calculate and verify checksums for inode bitmaps Darrick J. Wong
2012-01-07 8:28 ` [PATCH 08/23] ext4: Calculate and verify block bitmap checksum Darrick J. Wong
2012-01-07 8:28 ` [PATCH 09/23] ext4: Verify and calculate checksums for extent tree blocks Darrick J. Wong
2012-01-07 8:28 ` [PATCH 10/23] ext4: Calculate and verify checksums for htree nodes Darrick J. Wong
2012-01-07 8:29 ` [PATCH 11/23] ext4: Calculate and verify checksums of directory leaf blocks Darrick J. Wong
2012-01-07 8:29 ` [PATCH 12/23] ext4: Calculate and verify checksums of extended attribute blocks Darrick J. Wong
2012-01-07 8:29 ` [PATCH 13/23] ext4: Add new feature to make block group checksums use metadata_csum algorithm Darrick J. Wong
[not found] ` <8ED6E1F9-DB56-4D31-BCA8-2A3A8D514BD5@dilger.ca>
2012-02-13 22:28 ` Ted Ts'o [this message]
2012-02-29 1:27 ` [RFC] e2fsprogs: Rework metadata_csum/gdt_csum flag handling Darrick J. Wong
2012-02-29 5:40 ` Andreas Dilger
2012-03-03 3:50 ` [RFC v2] " Darrick J. Wong
2012-02-29 1:32 ` [RFC] ext4: Rework metadata_csum/gdt_csum flag handling in kernel Darrick J. Wong
2012-02-29 5:48 ` Andreas Dilger
2012-03-03 3:56 ` [RFC v2] " Darrick J. Wong
2012-01-07 8:29 ` [PATCH 14/23] ext4: Add checksums to the MMP block Darrick J. Wong
2012-01-07 8:29 ` [PATCH 15/23] jbd2: Change disk layout for metadata checksumming Darrick J. Wong
2012-01-07 8:29 ` [PATCH 16/23] jbd2: Enable journal clients to enable v2 checksumming Darrick J. Wong
2012-01-07 8:29 ` [PATCH 17/23] jbd2: Grab a reference to the crc32c driver only when necessary Darrick J. Wong
2012-01-07 8:29 ` [PATCH 18/23] jbd2: Checksum journal superblock Darrick J. Wong
2012-01-07 8:30 ` [PATCH 19/23] jbd2: Checksum revocation blocks Darrick J. Wong
2012-01-07 8:30 ` [PATCH 20/23] jbd2: Checksum descriptor blocks Darrick J. Wong
2012-01-07 8:30 ` [PATCH 21/23] jbd2: Checksum commit blocks Darrick J. Wong
2012-01-07 8:30 ` [PATCH 22/23] jbd2: Checksum data blocks that are stored in the journal Darrick J. Wong
2012-01-07 8:30 ` [PATCH 23/23] ext4/jbd2: Add metadata checksumming to the list of supported features Darrick J. Wong
2012-02-08 18:08 ` Collapsing the number of feature flags (was Re: [PATCH v2.3 00/23] ext4: Add metadata checksumming) Ted Ts'o
2012-02-09 19:54 ` Darrick J. Wong
2012-02-09 22:49 ` Ted Ts'o
2012-02-10 19:11 ` Andreas Dilger
2012-02-10 21:11 ` Ted Ts'o
2012-02-12 1:38 ` Andreas Dilger
2012-02-12 2:55 ` Ted Ts'o
-- strict thread matches above, loose matches on Subject: below --
2011-12-14 0:46 [PATCH v2.2 00/23] ext4: Add metadata checksumming Darrick J. Wong
2011-12-14 0:47 ` [PATCH 13/23] ext4: Add new feature to make block group checksums use metadata_csum algorithm Darrick J. Wong
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