Re: [PATCH] ceph: reconnect connection if session hang in opening state

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On Wed, Aug 28, 2019 at 9:24 PM <chenerqi@xxxxxxxxx> wrote:
>
> From: Erqi Chen <chenerqi@xxxxxxxxx>
>
> If client mds session is evicted in CEPH_MDS_SESSION_OPENING state,
> mds won't send session msg to client, and delayed_work skip
> CEPH_MDS_SESSION_OPENING state session, the session hang forever.
> ceph_con_keepalive reconnct connection for CEPH_MDS_SESSION_OPENING
> session to avoid session hang.
>
> Fixes: https://tracker.ceph.com/issues/41551
> Signed-off-by: Erqi Chen chenerqi@xxxxxxxxx
> ---
>  fs/ceph/mds_client.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
> index 920e9f0..3d589c0 100644
> --- a/fs/ceph/mds_client.c
> +++ b/fs/ceph/mds_client.c
> @@ -4044,7 +4044,9 @@ static void delayed_work(struct work_struct *work)
>                                 pr_info("mds%d hung\n", s->s_mds);
>                         }
>                 }
> -               if (s->s_state < CEPH_MDS_SESSION_OPEN) {
> +               if (s->s_state == CEPH_MDS_SESSION_NEW ||
> +                   s->s_state == CEPH_MDS_SESSION_RESTARTING ||
> +                   s->s_state == CEPH_MDS_SESSION_REJECTED)
>                         /* this mds is failed or recovering, just wait */
>                         ceph_put_mds_session(s);
>                         continue;
> --
> 1.8.3.1
>
    Reviewed-by: "Yan, Zheng" <zyan@xxxxxxxxxx>



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