fi_command_fom.c

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/* -*- C -*- */
/*
 * Copyright (c) 2017-2020 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_OTHER

#include "lib/trace.h"
#include "lib/memory.h"           /* M0_ALLOC_PTR, m0_free */
#include "lib/buf.h"              /* m0_buf_strdup */
#include "lib/finject.h"          /* M0_FI_ENABLED */

#include "fis/fi_command.h"
#include "fis/fi_command_fops.h"
#include "fop/fom_generic.h"
#include "fop/fop.h"
#include "rpc/rpc.h"
#include "sm/sm.h"


struct m0_fi_command_fom {
        struct m0_fom  fcf_gen;
        struct m0_fop *fcf_fop;
};

extern const struct m0_fom_ops fi_command_fom_ops;

static int fi_command_fom_create(struct m0_fop *fop, struct m0_fom **out,
                                 struct m0_reqh *reqh)
{
        struct m0_fom            *fom;
        struct m0_fi_command_fom *fom_obj;
        struct m0_fop            *fop_rep;

        M0_ENTRY();
        M0_PRE(fop != NULL);
        M0_PRE(out != NULL);

        fop_rep = M0_FI_ENABLED("no_mem") ? NULL :
                m0_fop_reply_alloc(fop, &m0_fi_command_rep_fopt);
        M0_ALLOC_PTR(fom_obj);
        if (fop_rep == NULL || fom_obj == NULL)
                goto no_mem;
        fom = &fom_obj->fcf_gen;
        m0_fom_init(fom, &fop->f_type->ft_fom_type, &fi_command_fom_ops, fop,
                    fop_rep, reqh);
        fom_obj->fcf_fop = fop;
        *out = fom;
        return M0_RC(0);
no_mem:
        m0_free(fop_rep);
        m0_free(fom_obj);
        return M0_ERR(-ENOMEM);
}

static void fi_command_fom_fini(struct m0_fom *fom)
{
        struct m0_fi_command_fom *fom_obj = M0_AMB(fom_obj, fom, fcf_gen);

        m0_fom_fini(fom);
        m0_free(fom_obj);
}

static int fi_command_execute(const struct m0_fi_command_req *req)
{
        char *func = m0_buf_strdup(&req->fcr_func);
        char *tag  = m0_buf_strdup(&req->fcr_tag);
        int   rc   = 0;

        M0_ENTRY("func=%s tag=%s disp=%d", func, tag, req->fcr_disp);
        if (func == NULL || tag == NULL) {
                rc = -ENOMEM;
                goto out;
        }
        switch (req->fcr_disp) {
        case M0_FI_DISP_ENABLE:
                m0_fi_enable(func, tag);
                break;
        case M0_FI_DISP_DISABLE:
                m0_fi_disable(func, tag);
                break;
        case M0_FI_DISP_ENABLE_ONCE:
                m0_fi_enable_once(func, tag);
                break;
        case M0_FI_DISP_RANDOMIZE:
                m0_fi_enable_random(func, tag, req->fcr_num1);
                break;
        case M0_FI_DISP_DO_OFF_N_ON_M:
                m0_fi_enable_off_n_on_m(func, tag, req->fcr_num1,
                                        req->fcr_num2);
                break;
        default:
                rc = -EINVAL;
        }
out:
        m0_free(func);
        m0_free(tag);
        return rc == 0 ? M0_RC(rc) : M0_ERR(rc);
}

static int fi_command_fom_tick(struct m0_fom *fom)
{
        struct m0_fi_command_fom *fcf = M0_AMB(fcf, fom, fcf_gen);
        struct m0_fi_command_req *req = m0_fop_data(fcf->fcf_fop);
        struct m0_fop            *fop = fom->fo_rep_fop;
        struct m0_fi_command_rep *rep = m0_fop_data(fop);

        rep->fcp_rc = fi_command_execute(req);
        m0_rpc_reply_post(&fcf->fcf_fop->f_item, m0_fop_to_rpc_item(fop));
        m0_fom_phase_set(fom, M0_FOPH_FINISH);
        return M0_FSO_WAIT;
}

static size_t fi_command_fom_locality(const struct m0_fom *fom)
{
        static size_t locality = 0;

        return locality++;
}

const struct m0_fom_type_ops m0_fi_command_fom_type_ops = {
        .fto_create = fi_command_fom_create
};

const struct m0_fom_ops fi_command_fom_ops = {
        .fo_fini          = fi_command_fom_fini,
        .fo_tick          = fi_command_fom_tick,
        .fo_home_locality = fi_command_fom_locality
};

#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:
 */