Re: [PATCH v3 2/2] libceph: check the data length when sparse-read finishes

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On Mon, Nov 6, 2023 at 2:19 AM <xiubli@xxxxxxxxxx> wrote:
>
> From: Xiubo Li <xiubli@xxxxxxxxxx>
>
> For sparse reading the real length of the data should equal to the
> total length from the extent array.
>
> URL: https://tracker.ceph.com/issues/62081
> Signed-off-by: Xiubo Li <xiubli@xxxxxxxxxx>
> Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
>  net/ceph/osd_client.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
> index 0e629dfd55ee..050dc39065fb 100644
> --- a/net/ceph/osd_client.c
> +++ b/net/ceph/osd_client.c
> @@ -5920,6 +5920,12 @@ static int osd_sparse_read(struct ceph_connection *con,
>                 fallthrough;
>         case CEPH_SPARSE_READ_DATA:
>                 if (sr->sr_index >= count) {
> +                       if (sr->sr_datalen && count) {
> +                               pr_warn_ratelimited("%s: datalen and extents mismath, %d left\n",
> +                                                   __func__, sr->sr_datalen);
> +                               return -EREMOTEIO;

By returning EREMOTEIO here you have significantly changed the
semantics (in v2 it was just a warning) but Jeff's Reviewed-by is
retained.  Has he acked the change?

Thanks,

                Ilya





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