fid_convert.c

Go to the documentation of this file.

/* -*- C -*- */
/*
 * Copyright (c) 2015-2020 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.
 *
 */


#include "ioservice/fid_convert.h"

#include "cob/cob.h"            /* m0_cob_fid_type */

#include "stob/type.h"          /* m0_stob_type */
#include "stob/ad.h"            /* m0_stob_ad_type */
#include "stob/linux.h"         /* m0_stob_linux_type */
#include "module/instance.h"    /* m0_get */

M0_INTERNAL void m0_fid_convert_cob2adstob(const struct m0_fid *cob_fid,
                                           struct m0_stob_id   *stob_id)
{
        uint32_t device_id;

        M0_PRE(m0_fid_validate_cob(cob_fid));

        device_id = m0_fid__device_id_extract(cob_fid);
        stob_id->si_fid = *cob_fid;
        m0_fid_tassume(&stob_id->si_fid, &m0_stob_ad_type.st_fidt);
        m0_fid_tset(&stob_id->si_domain_fid, m0_stob_ad_type.st_fidt.ft_id,
                    0, device_id);

        M0_POST(m0_fid_validate_adstob(stob_id));
}

M0_INTERNAL void m0_fid_convert_adstob2cob(const struct m0_stob_id *stob_id,
                                           struct m0_fid           *cob_fid)
{
        M0_PRE(m0_fid_validate_adstob(stob_id));

        *cob_fid = stob_id->si_fid;
        m0_fid_tassume(cob_fid, &m0_cob_fid_type);

        M0_POST(m0_fid_validate_cob(cob_fid));
}

M0_INTERNAL void
m0_fid_convert_bstore2adstob(const struct m0_fid *bstore_fid,
                             struct m0_fid       *stob_domain_fid)
{
        M0_PRE(m0_fid_validate_bstore(bstore_fid));

        *stob_domain_fid = *bstore_fid;
        m0_fid_tassume(stob_domain_fid, &m0_stob_ad_type.st_fidt);
}

M0_INTERNAL void
m0_fid_convert_adstob2bstore(const struct m0_fid *stob_domain_fid,
                             struct m0_fid       *bstore_fid)
{
        M0_PRE(m0_fid_tget(stob_domain_fid) == m0_stob_ad_type.st_fidt.ft_id);

        *bstore_fid = *stob_domain_fid;
        m0_fid_tassume(bstore_fid, &m0_stob_linux_type.st_fidt);

        M0_POST(m0_fid_validate_bstore(bstore_fid));
}

M0_INTERNAL bool m0_fid_validate_adstob(const struct m0_stob_id *stob_id)
{
        return m0_fid_tget(&stob_id->si_fid) == m0_stob_ad_type.st_fidt.ft_id &&
               m0_fid_tget(&stob_id->si_domain_fid) ==
               m0_stob_ad_type.st_fidt.ft_id &&
               m0_fid__device_id_extract(&stob_id->si_fid) ==
               stob_id->si_domain_fid.f_key &&
               (stob_id->si_domain_fid.f_container & M0_FID_TYPE_MASK) == 0;

}

M0_INTERNAL bool m0_fid_validate_bstore(const struct m0_fid *bstore_fid)
{
        return m0_fid_tget(bstore_fid) == m0_stob_linux_type.st_fidt.ft_id;
}

M0_INTERNAL bool m0_fid_validate_linuxstob(const struct m0_stob_id *stob_id)
{
        return m0_fid_tget(&stob_id->si_fid) ==
                        m0_stob_linux_type.st_fidt.ft_id &&
               m0_fid_tget(&stob_id->si_domain_fid) ==
                        m0_stob_linux_type.st_fidt.ft_id &&
                (stob_id->si_domain_fid.f_container & M0_FID_TYPE_MASK) == 0;

}

M0_INTERNAL void m0_fid_convert_cob2linuxstob(const struct m0_fid *cob_fid,
                                              struct m0_stob_id   *stob_id)
{
        uint32_t device_id;

        M0_PRE(m0_fid_validate_cob(cob_fid));

        device_id = m0_get()->i_storage_is_fake ? M0_SDEV_CID_DEFAULT :
                                             m0_fid__device_id_extract(cob_fid);
        stob_id->si_fid = *cob_fid;
        m0_fid_tassume(&stob_id->si_fid, &m0_stob_linux_type.st_fidt);
        m0_fid_tset(&stob_id->si_domain_fid, m0_stob_linux_type.st_fidt.ft_id,
                    0, device_id);

        M0_POST(m0_fid_validate_linuxstob(stob_id));
}

M0_INTERNAL void m0_fid_convert_linuxstob2cob(const struct m0_stob_id *stob_id,
                                              struct m0_fid           *cob_fid)
{
        M0_PRE(m0_fid_validate_linuxstob(stob_id));

        *cob_fid = stob_id->si_fid;
        m0_fid_tassume(cob_fid, &m0_cob_fid_type);

        M0_POST(m0_fid_validate_cob(cob_fid));
}

M0_INTERNAL void m0_fid_convert_cob2stob(const struct m0_fid *cob_fid,
                                         struct m0_stob_id   *stob_id)
{
        bool stob_ad = m0_get()->i_reqh_uses_ad_stob;

        if (stob_ad)
                m0_fid_convert_cob2adstob(cob_fid, stob_id);
        else
                m0_fid_convert_cob2linuxstob(cob_fid, stob_id);
}

M0_INTERNAL void m0_fid_convert_stob2cob(const struct m0_stob_id   *stob_id,
                                         struct m0_fid *cob_fid)
{
        bool stob_ad = m0_get()->i_reqh_uses_ad_stob;

        if (stob_ad)
                m0_fid_convert_adstob2cob(stob_id, cob_fid);
        else
                m0_fid_convert_linuxstob2cob(stob_id, cob_fid);
}

/*
 *  Local variables:
 *  c-indentation-style: "K&R"
 *  c-basic-offset: 8
 *  tab-width: 8
 *  fill-column: 80
 *  scroll-step: 1
 *  End:
 */
/*
 * vim: tabstop=8 shiftwidth=8 noexpandtab textwidth=80 nowrap
 */