domain.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_NET
#include "lib/trace.h"

#include "lib/assert.h"
#include "net/net_internal.h"

static void net_domain_fini(struct m0_net_domain *dom);

int m0_net_domain_init(struct m0_net_domain *dom,
                       const struct m0_net_xprt *xprt)
{
        int rc;

        M0_ENTRY();
        m0_mutex_lock(&m0_net_mutex);
        M0_PRE(dom->nd_xprt == NULL);

        m0_mutex_init(&dom->nd_mutex);
        m0_list_init(&dom->nd_registered_bufs);
        m0_list_init(&dom->nd_tms);

        dom->nd_xprt_private = NULL;
        dom->nd_xprt = xprt;
        rc = xprt->nx_ops->xo_dom_init(xprt, dom);
        if (rc != 0) {
                dom->nd_xprt = NULL; /* prevent call to xo_dom_fini */
                net_domain_fini(dom);
                m0_mutex_unlock(&m0_net_mutex);
                return M0_RC(rc);
        }
        dom->nd_get_max_buffer_segment_size =
                        xprt->nx_ops->xo_get_max_buffer_segment_size(dom);
        dom->nd_get_max_buffer_segments =
                        xprt->nx_ops->xo_get_max_buffer_segments(dom);
        dom->nd_get_max_buffer_size =
                        xprt->nx_ops->xo_get_max_buffer_size(dom);
        dom->nd_get_max_buffer_desc_size =
                        xprt->nx_ops->xo_get_max_buffer_desc_size(dom);
        m0_mutex_unlock(&m0_net_mutex);
        return M0_RC(rc);
}
M0_EXPORTED(m0_net_domain_init);

void m0_net_domain_fini(struct m0_net_domain *dom)
{
        M0_ENTRY();
        m0_mutex_lock(&m0_net_mutex);
        net_domain_fini(dom);
        m0_mutex_unlock(&m0_net_mutex);
        M0_LEAVE();
}
M0_EXPORTED(m0_net_domain_fini);

static void net_domain_fini(struct m0_net_domain *dom)
{
        M0_PRE(m0_mutex_is_locked(&m0_net_mutex));
        M0_PRE(m0_list_is_empty(&dom->nd_tms));
        M0_PRE(m0_list_is_empty(&dom->nd_registered_bufs));

        if (dom->nd_xprt != NULL) {
                dom->nd_xprt->nx_ops->xo_dom_fini(dom);
                dom->nd_xprt = NULL;
        }
        dom->nd_xprt_private = NULL;

        m0_list_fini(&dom->nd_tms);
        m0_list_fini(&dom->nd_registered_bufs);
        m0_mutex_fini(&dom->nd_mutex);
}

#define DOM_GET_PARAM(Fn, Type)                         \
Type m0_net_domain_get_##Fn(struct m0_net_domain *dom)  \
{                                                       \
        Type rc;                                        \
        M0_PRE(dom != NULL);                            \
        M0_PRE(dom->nd_xprt != NULL);                   \
        rc = dom->nd_get_##Fn;                          \
        return rc;                                      \
}

DOM_GET_PARAM(max_buffer_size, m0_bcount_t);
DOM_GET_PARAM(max_buffer_segment_size, m0_bcount_t);
DOM_GET_PARAM(max_buffer_segments, int32_t);
DOM_GET_PARAM(max_buffer_desc_size, m0_bcount_t);

#undef M0_TRACE_SUBSYSTEM

/*
 *  Local variables:
 *  c-indentation-style: "K&R"
 *  c-basic-offset: 8
 *  tab-width: 8
 *  fill-column: 79
 *  scroll-step: 1
 *  End:
 */