pool.c

Go to the documentation of this file.

/*
 * Copyright (c) 2014-2020 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_CONF
#include "lib/trace.h"

#include "conf/objs/common.h"
#include "conf/onwire_xc.h"  /* m0_confx_pool_xc */
#include "motr/magic.h"      /* M0_CONF_POOL_MAGIC */
#include "fid/fid.h"


#define XCAST(xobj) ((struct m0_confx_pool *)(&(xobj)->xo_u))
M0_BASSERT(offsetof(struct m0_confx_pool, xp_header) == 0);

static bool pool_check(const void *bob)
{
        const struct m0_conf_pool *self = bob;

        M0_PRE(m0_conf_obj_type(&self->pl_obj) == &M0_CONF_POOL_TYPE);

        return true;
}

M0_CONF__BOB_DEFINE(m0_conf_pool, M0_CONF_POOL_MAGIC, pool_check);
M0_CONF__INVARIANT_DEFINE(pool_invariant, m0_conf_pool);

static int pool_decode(struct m0_conf_obj *dest, const struct m0_confx_obj *src)
{
        struct m0_conf_pool        *d = M0_CONF_CAST(dest, m0_conf_pool);
        const struct m0_confx_pool *s = XCAST(src);

        M0_ENTRY("dest="FID_F, FID_P(&dest->co_id));
        d->pl_pver_policy = s->xp_pver_policy;
        return M0_RC(m0_conf_dir_new(dest, &M0_CONF_POOL_PVERS_FID,
                                     &M0_CONF_PVER_TYPE, &s->xp_pvers,
                                     &d->pl_pvers));
}

static int
pool_encode(struct m0_confx_obj *dest, const struct m0_conf_obj *src)
{
        struct m0_conf_pool  *s = M0_CONF_CAST(src, m0_conf_pool);
        struct m0_confx_pool *d = XCAST(dest);

        confx_encode(dest, src);
        d->xp_pver_policy = s->pl_pver_policy;
        return M0_RC(arrfid_from_dir(&d->xp_pvers, s->pl_pvers));
}

static bool
pool_match(const struct m0_conf_obj *cached, const struct m0_confx_obj *flat)
{
        const struct m0_confx_pool *xobj = XCAST(flat);
        const struct m0_conf_pool  *obj = M0_CONF_CAST(cached, m0_conf_pool);

        return obj->pl_pver_policy == xobj->xp_pver_policy &&
                m0_conf_dir_elems_match(obj->pl_pvers, &xobj->xp_pvers);
}

static int pool_lookup(const struct m0_conf_obj *parent,
                       const struct m0_fid *name, struct m0_conf_obj **out)
{
        struct m0_conf_pool *pool = M0_CONF_CAST(parent, m0_conf_pool);
        const struct conf_dir_relation dirs[] = {
                { pool->pl_pvers, &M0_CONF_POOL_PVERS_FID }
        };

        M0_PRE(parent->co_status == M0_CS_READY);
        return M0_RC(conf_dirs_lookup(out, name, dirs, ARRAY_SIZE(dirs)));
}

static const struct m0_fid **pool_downlinks(const struct m0_conf_obj *obj)
{
        static const struct m0_fid *rels[] = { &M0_CONF_POOL_PVERS_FID,
                                               NULL };
        M0_PRE(m0_conf_obj_type(obj) == &M0_CONF_POOL_TYPE);
        return rels;
}

static void pool_delete(struct m0_conf_obj *obj)
{
        struct m0_conf_pool *x = M0_CONF_CAST(obj, m0_conf_pool);

        m0_conf_pool_bob_fini(x);
        m0_free(x);
}

static const struct m0_conf_obj_ops pool_ops = {
        .coo_invariant = pool_invariant,
        .coo_decode    = pool_decode,
        .coo_encode    = pool_encode,
        .coo_match     = pool_match,
        .coo_lookup    = pool_lookup,
        .coo_readdir   = NULL,
        .coo_downlinks = pool_downlinks,
        .coo_delete    = pool_delete
};

M0_CONF__CTOR_DEFINE(pool_create, m0_conf_pool, &pool_ops);

const struct m0_conf_obj_type M0_CONF_POOL_TYPE = {
        .cot_ftype = {
                .ft_id   = M0_CONF__POOL_FT_ID,
                .ft_name = "conf_pool"
        },
        .cot_create  = &pool_create,
        .cot_xt      = &m0_confx_pool_xc,
        .cot_branch  = "u_pool",
        .cot_xc_init = &m0_xc_m0_confx_pool_struct_init,
        .cot_magic   = M0_CONF_POOL_MAGIC
};

#undef XCAST
#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:
 */
/*
 * vim: tabstop=8 shiftwidth=8 noexpandtab textwidth=80 nowrap
 */