Re: [PATCH] ceph: sync metadata when having I_DIRTY_DATASYNC flag in fdatasync

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On Sat, Mar 10, 2018 at 4:18 PM, Chengguang Xu <cgxu519@xxxxxxx> wrote:
> When inode marks flag I_DIRTY_DATASYNC, even if fdatasync
> should sync essential metadata.
>
> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxx>
> ---
>  fs/ceph/caps.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
> index 0e5bd3e..6e08abb 100644
> --- a/fs/ceph/caps.c
> +++ b/fs/ceph/caps.c
> @@ -2170,7 +2170,7 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
>         if (ret < 0)
>                 goto out;
>
> -       if (datasync)
> +       if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
>                 goto out;
>
>         inode_lock(inode);

The code in __ceph_mark_dirty_caps() that set I_DIRTY_DATASYNC should
never be executed.  we never mark CEPH_CAP_FILE_BUFFER dirty. need
check if that's a bug first

> --
> 1.8.3.1
>
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