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Commit 0851de06 authored by Alexandros Batsakis's avatar Alexandros Batsakis Committed by Trond Myklebust
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nfs4: renewd renew operations should take/put a client reference 



renewd sends RENEW requests to the NFS server in order to renew state.
As the request is asynchronous, renewd should take a reference to the
nfs_client to prevent concurrent umounts from freeing the client

Signed-off-by: default avatarAlexandros Batsakis <batsakis@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 7135840f

fs/nfs/nfs4proc.c

+5 −1
Original line number Diff line number Diff line
@@ -3152,7 +3152,9 @@ static void nfs4_renew_release(void *data) 
{

	struct nfs_client *clp = data;



	if (atomic_read(&clp->cl_count) > 1)

		nfs4_schedule_state_renewal(clp);

	nfs_put_client(clp);

}



static void nfs4_renew_done(struct rpc_task *task, void *data)
@@ -3185,6 +3187,8 @@ int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) 
		.rpc_cred	= cred,

	};



	if (!atomic_inc_not_zero(&clp->cl_count))

		return -EIO;

	return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,

			&nfs4_renew_ops, clp);

}