Reviewed-by: Daeho Jeong <daehojeong@xxxxxxxxxx>
On Wed, Mar 13, 2024 at 4:37 AM Sunmin Jeong <s_min.jeong@xxxxxxxxxxx> wrote:
>
> In f2fs_update_inode, i_size of the atomic file isn't updated until
> FI_ATOMIC_COMMITTED flag is set. When committing atomic write right
> after the writeback of the inode, i_size of the raw inode will not be
> updated. It can cause the atomicity corruption due to a mismatch between
> old file size and new data.
>
> To prevent the problem, let's mark inode dirty for FI_ATOMIC_COMMITTED
>
> Atomic write thread Writeback thread
> __writeback_single_inode
> write_inode
> f2fs_update_inode
> - skip i_size update
> f2fs_ioc_commit_atomic_write
> f2fs_commit_atomic_write
> set_inode_flag(inode, FI_ATOMIC_COMMITTED)
> f2fs_do_sync_file
> f2fs_fsync_node_pages
> - skip f2fs_update_inode since the inode is clean
>
> Fixes: 3db1de0e582c ("f2fs: change the current atomic write way")
> Cc: stable@xxxxxxxxxxxxxxx #v5.19+
> Reviewed-by: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
> Reviewed-by: Yeongjin Gil <youngjin.gil@xxxxxxxxxxx>
> Signed-off-by: Sunmin Jeong <s_min.jeong@xxxxxxxxxxx>
> ---
> fs/f2fs/f2fs.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 543898482f8b..a000cb024dbe 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -3039,6 +3039,7 @@ static inline void __mark_inode_dirty_flag(struct inode *inode,
> case FI_INLINE_DOTS:
> case FI_PIN_FILE:
> case FI_COMPRESS_RELEASED:
> + case FI_ATOMIC_COMMITTED:
> f2fs_mark_inode_dirty_sync(inode, true);
> }
> }
> --
> 2.25.1
>
>
>
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