ag.h

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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.
 *
 */


#pragma once

#ifndef __MOTR_SNS_CM_REPAIR_AG_H__
#define __MOTR_SNS_CM_REPAIR_AG_H__


#include "sns/cm/ag.h"
#include "pool/pool_machine.h"

struct m0_sns_cm_repair_ag_failure_ctx {
        struct m0_sns_cm_cp          fc_tgt_acc_cp;

        uint32_t                     fc_failed_idx;

        uint32_t                     fc_tgt_idx;

        /*
         * cob fid containing the target unit for the aggregation
         * group.
         */
        struct m0_fid                fc_tgt_cobfid;

        uint64_t                     fc_tgt_cob_index;

        bool                         fc_is_active;

        bool                         fc_is_inuse;
};

struct m0_sns_cm_repair_ag {
        struct m0_sns_cm_ag                     rag_base;

        uint32_t                                rag_acc_freed;

        uint32_t                                rag_acc_inuse_nr;

        struct m0_sns_cm_repair_ag_failure_ctx *rag_fc;

        struct m0_parity_math                   rag_math;

        struct m0_sns_ir                        rag_ir;
};


M0_INTERNAL int m0_sns_cm_repair_ag_alloc(struct m0_cm *cm,
                                          const struct m0_cm_ag_id *id,
                                          bool has_incoming,
                                          struct m0_cm_aggr_group **out);

/*
 * Configures accumulator copy packet, acquires buffer for accumulator copy
 * packet.
 * Increments struct m0_cm_aggr_group::cag_cp_local_nr for newly created
 * accumulator copy packets, so that aggregation group is not finalised before
 * the finalisation of accumulator copy packets.
 *
 * @see m0_sns_cm_acc_cp_setup()
 */
M0_INTERNAL int m0_sns_cm_repair_ag_setup(struct m0_sns_cm_ag *ag,
                                          struct m0_pdclust_layout *pl);

M0_INTERNAL bool m0_sns_cm_ag_acc_is_full_with(const struct m0_cm_cp *acc,
                                               uint64_t nr_cps);

M0_INTERNAL int64_t m0_sns_cm_repair_ag_inbufs(struct m0_sns_cm *scm,
                                               struct m0_sns_cm_file_ctx *fctx,
                                               const struct m0_cm_ag_id *id);

M0_INTERNAL struct m0_sns_cm_repair_ag *
sag2repairag(const struct m0_sns_cm_ag *sag);

#endif /* __MOTR_SNS_CM_REPAIR_AG_H__ */

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