linux-kernel - Re: [PATCH v2 08/10] md: Implement ->corrupted

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Date:   Tue, 26 Jan 2021 01:50:32 +0100
From:   Guoqing Jiang <guoqing.jiang@...ud.ionos.com>
To:     Shiyang Ruan <ruansy.fnst@...fujitsu.com>,
        linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org
Cc:     linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
        darrick.wong@...cle.com, dan.j.williams@...el.com,
        david@...morbit.com, hch@....de, song@...nel.org, rgoldwyn@...e.de,
        qi.fuli@...itsu.com, y-goto@...itsu.com
Subject: Re: [PATCH v2 08/10] md: Implement ->corrupted_range()



On 1/25/21 23:55, Shiyang Ruan wrote:
> With the support of ->rmap(), it is possible to obtain the superblock on
> a mapped device.
> 
> If a pmem device is used as one target of mapped device, we cannot
> obtain its superblock directly.  With the help of SYSFS, the mapped
> device can be found on the target devices.  So, we iterate the
> bdev->bd_holder_disks to obtain its mapped device.
> 
> Signed-off-by: Shiyang Ruan <ruansy.fnst@...fujitsu.com>
> ---
>   drivers/md/dm.c       | 61 +++++++++++++++++++++++++++++++++++++++++++
>   drivers/nvdimm/pmem.c | 11 +++-----
>   fs/block_dev.c        | 42 ++++++++++++++++++++++++++++-
>   include/linux/genhd.h |  2 ++
>   4 files changed, 107 insertions(+), 9 deletions(-)

I can't see md raid is involved here, perhaps dm-devel need to be cced 
instead of raid list. And the subject need to be changed as well.

Thanks,
Guoqing