linux-kernel - Re: [PATCH v9 0/8] block atomic writes for xfs

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Message-ID: <8107c05d-1222-4e47-bbcd-eba64e085669@oracle.com>
Date: Fri, 18 Oct 2024 10:29:17 +0100
From: John Garry <john.g.garry@...cle.com>
To: axboe@...nel.dk, 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,
        brauner@...nel.org, djwong@...nel.org, viro@...iv.linux.org.uk,
        jack@...e.cz, dchinner@...hat.com, hch@....de
Subject: Re: [PATCH v9 0/8] block atomic writes for xfs

On 16/10/2024 11:03, John Garry wrote:

Hi Jens,

There are block changes in this series. I was going to ask Carlos to 
queue this work via the XFS tree, so can you let me know whether you 
have any issue with those (block) changes. There is a fix included, 
which I can manually backport to stable (if not autoselected).

Note that I still plan on sending a v10 for this series, to fix a small 
documentation issue which Darrick noticed.

BTW, I was hoping to send non-RFCs patches for atomic write RAID support 
soon, originally sent in:
https://lore.kernel.org/linux-block/20240919092302.3094725-1-john.g.garry@oracle.com/
https://lore.kernel.org/linux-block/20240903150748.2179966-1-john.g.garry@oracle.com/

They should not have any dependency or conflict with this series.

Thanks,
John

> This series expands atomic write support to filesystems, specifically
> XFS.
> 
> Initially we will only support writing exactly 1x FS block atomically.
> 
> Since we can now have FS block size > PAGE_SIZE for XFS, we can write
> atomically 4K+ blocks on x86.
> 

...

> John Garry (8):
>    block/fs: Pass an iocb to generic_atomic_write_valid()
>    fs/block: Check for IOCB_DIRECT in generic_atomic_write_valid()
>    block: Add bdev atomic write limits helpers
>    fs: Export generic_atomic_write_valid()
>    fs: iomap: Atomic write support
>    xfs: Support atomic write for statx
>    xfs: Validate atomic writes
>    xfs: Support setting FMODE_CAN_ATOMIC_WRITE
> 
>   .../filesystems/iomap/operations.rst          | 11 ++++++
>   block/fops.c                                  | 22 ++++++-----
>   fs/iomap/direct-io.c                          | 38 +++++++++++++++++--
>   fs/iomap/trace.h                              |  3 +-
>   fs/read_write.c                               | 16 +++++---
>   fs/xfs/xfs_buf.c                              |  7 ++++
>   fs/xfs/xfs_buf.h                              |  4 ++
>   fs/xfs/xfs_file.c                             | 16 ++++++++
>   fs/xfs/xfs_inode.h                            | 15 ++++++++
>   fs/xfs/xfs_iops.c                             | 22 +++++++++++
>   include/linux/blkdev.h                        | 16 ++++++++
>   include/linux/fs.h                            |  2 +-
>   include/linux/iomap.h                         |  1 +
>   13 files changed, 151 insertions(+), 22 deletions(-)
>