>
> 在 2018年2月23日，下午5:09，Chengguang Xu <cgxu519@xxxxxxxxxx> 写道：
>
> Adding spinlock protection during getting cap reservation
> ralated fields so that the numbers match below BUG_ON condition
> in the code.
>
> BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count +
> mdsc->caps_reserve_count +
> mdsc->caps_avail_count);
>
> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxx>
> ---
> fs/ceph/caps.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
> index 6582c45..c85dae8 100644
> --- a/fs/ceph/caps.c
> +++ b/fs/ceph/caps.c
> @@ -341,6 +341,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc,
> {
> struct ceph_mds_client *mdsc = fsc->mdsc;
>
> + spin_lock(&mdsc->caps_list_lock);
> +
> if (total)
> *total = mdsc->caps_total_count;
> if (avail)
> @@ -351,6 +353,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc,
> *reserved = mdsc->caps_reserve_count;
> if (min)
> *min = mdsc->caps_min_count;
> +
> + spin_unlock(&mdsc->caps_list_lock);
> }
>
> /*
> --
> 1.8.3.1
>
ping.
Thanks,
Chengguang.
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