service.c

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/* -*- C -*- */
/*
 * Copyright (c) 2012-2020 Seagate Technology LLC and/or its Affiliates
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * For any questions about this software or licensing,
 * please email opensource@seagate.com or cortx-questions@seagate.com.
 *
 */


#define M0_TRACE_SUBSYSTEM M0_TRACE_SUBSYS_SNSCM
#include "lib/memory.h"
#include "lib/assert.h"
#include "lib/errno.h"
#include "lib/trace.h"
#include "lib/misc.h"
#include "lib/finject.h"

#include "reqh/reqh_service.h"
#include "sns/cm/cm.h"
#include "motr/setup.h"
#include "sns/cm/sns_cp_onwire.h"

M0_INTERNAL int
m0_sns_cm_svc_allocate(struct m0_reqh_service **service,
                       const struct m0_reqh_service_type *stype,
                       const struct m0_reqh_service_ops *svc_ops,
                       const struct m0_cm_ops *cm_ops)
{
        struct m0_sns_cm *sns_cm;
        struct m0_cm     *cm;
        int               rc;

        M0_ENTRY("stype: %p", stype);
        M0_PRE(service != NULL && stype != NULL);

        M0_ALLOC_PTR(sns_cm);
        if (sns_cm == NULL)
                return M0_RC(-ENOMEM);

        cm = &sns_cm->sc_base;
        *service = &cm->cm_service;
        (*service)->rs_ops = svc_ops;
        sns_cm->sc_magic = M0_SNS_CM_MAGIC;

        rc = m0_cm_init(cm, container_of(stype, struct m0_cm_type, ct_stype),
                        cm_ops);
        if (rc != 0)
                m0_free(sns_cm);

        M0_LOG(M0_DEBUG, "sns_cm: %p service: %p", sns_cm, *service);
        return M0_RC(rc);
}

M0_INTERNAL int m0_sns_cm_svc_start(struct m0_reqh_service *service)
{
        struct m0_cm                *cm;
        int                          rc;
        struct cs_endpoint_and_xprt *ep;
        struct m0_reqh_context      *rctx;
        struct m0_motr              *motr;

        M0_ENTRY("service: %p", service);
        M0_PRE(service != NULL);

        cm = container_of(service, struct m0_cm, cm_service);
        rc = m0_cm_setup(cm);
        if (rc != 0)
                return M0_RC(rc);

        /* The following shows how to retrieve ioservice endpoints list.
         * Copy machine can establish connections to all ioservices,
         * and build a map for "cob_id" -> "sesssion of ioservice" with
         * the same algorithm on m0t1fs client.
         */
        rctx = service->rs_reqh_ctx;
        motr = rctx->rc_motr;
        m0_tl_for(cs_eps, &motr->cc_ios_eps, ep) {
                M0_ASSERT(cs_endpoint_and_xprt_bob_check(ep));
                M0_LOG(M0_DEBUG, "pool_width=%d, "
                                 "ioservice xprt:endpoints: %s:%s",
                                 motr->cc_pool_width,
                                 ep->ex_xprt, ep->ex_endpoint);
        } m0_tl_endfor;

        M0_LEAVE();
        return M0_RC(rc);
}

M0_INTERNAL void m0_sns_cm_svc_stop(struct m0_reqh_service *service)
{
        struct m0_cm *cm;

        M0_ENTRY("service: %p", service);
        M0_PRE(service != NULL);

        cm = container_of(service, struct m0_cm, cm_service);
        /*
         * Finalise the copy machine as the copy machine as the service is
         * stopped.
         */
        m0_cm_fini(cm);

        M0_LEAVE();
}

M0_INTERNAL void m0_sns_cm_svc_fini(struct m0_reqh_service *service)
{
        struct m0_cm     *cm;
        struct m0_sns_cm *sns_cm;

        M0_ENTRY("service: %p", service);
        M0_PRE(service != NULL);

        cm = container_of(service, struct m0_cm, cm_service);
        sns_cm = cm2sns(cm);
        m0_free(sns_cm);

        M0_LEAVE();
}

#undef M0_TRACE_SUBSYSTEM

/*
 *  Local variables:
 *  c-indentation-style: "K&R"
 *  c-basic-offset: 8
 *  tab-width: 8
 *  fill-column: 80
 *  scroll-step: 1
 *  End:
 */