Re: [PATCH v2] NFSv4: don't mark all open state for recovery when handling recallable state revoked flag

[Trond Myklebust <trondmy@hammerspace.com>]

On Mon, 2019-05-06 at 11:59 -0400, Scott Mayhew wrote:
> Only delegations and layouts can be recalled, so it shouldn't be
> necessary to recover all opens when handling the status bit
> SEQ4_STATUS_RECALLABLE_STATE_REVOKED.  We'll still wind up calling
> nfs41_open_expired() when a TEST_STATEID returns
> NFS4ERR_DELEG_REVOKED.
> 
> Signed-off-by: Scott Mayhew <smayhew@redhat.com>
> ---
>  fs/nfs/delegation.c | 12 ++++++++++++
>  fs/nfs/delegation.h |  1 +
>  fs/nfs/nfs4state.c  |  3 +--
>  3 files changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
> index 2f6b447cdd82..8b78274e3e56 100644
> --- a/fs/nfs/delegation.c
> +++ b/fs/nfs/delegation.c
> @@ -1033,6 +1033,18 @@ void
> nfs_mark_test_expired_all_delegations(struct nfs_client *clp)
>  	rcu_read_unlock();
>  }
>  
> +/**
> + * nfs_test_expired_all_delegations - test all delegations for a
> client
> + * @clp: nfs_client to process
> + *
> + * Helper for handling "recallable state revoked" status from
> server.
> + */
> +void nfs_test_expired_all_delegations(struct nfs_client *clp)
> +{
> +	nfs_mark_test_expired_all_delegations(clp);
> +	nfs4_schedule_state_manager(clp);
> +}
> +
>  /**
>   * nfs_reap_expired_delegations - reap expired delegations
>   * @clp: nfs_client to process
> diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
> index 35b4b02c1ae0..5799777df5ec 100644
> --- a/fs/nfs/delegation.h
> +++ b/fs/nfs/delegation.h
> @@ -58,6 +58,7 @@ void nfs_delegation_mark_reclaim(struct nfs_client
> *clp);
>  void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
>  
>  void nfs_mark_test_expired_all_delegations(struct nfs_client *clp);
> +void nfs_test_expired_all_delegations(struct nfs_client *clp);
>  void nfs_reap_expired_delegations(struct nfs_client *clp);
>  
>  /* NFSv4 delegation-related procedures */
> diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
> index 3de36479ed7a..7d0ee5a2aef9 100644
> --- a/fs/nfs/nfs4state.c
> +++ b/fs/nfs/nfs4state.c
> @@ -2346,8 +2346,7 @@ static void
> nfs41_handle_recallable_state_revoked(struct nfs_client *clp)
>  {
>  	/* FIXME: For now, we destroy all layouts. */
>  	pnfs_destroy_all_layouts(clp);
> -	/* FIXME: For now, we test all delegations+open state+locks. */
> -	nfs41_handle_some_state_revoked(clp);
> +	nfs_test_expired_all_delegations(clp);
>  	dprintk("%s: Recallable state revoked on server %s!\n",
> __func__,
>  			clp->cl_hostname);
>  }

Thank you!

Reviewed-by: Trond Myklebust <trond.myklebust@hammerspace.com>

-- 
Trond Myklebust
Linux NFS client maintainer, Hammerspace
trond.myklebust@hammerspace.com