source: mainline/uspace/srv/bd/hr/hr.c@ 44ea48e

/*
 * Copyright (c) 2024 Miroslav Cimerman
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup hr
 * @{
 */
/**
 * @file
 */

#include <async.h>
#include <bd_srv.h>
#include <errno.h>
#include <hr.h>
#include <io/log.h>
#include <inttypes.h>
#include <ipc/hr.h>
#include <ipc/services.h>
#include <loc.h>
#include <task.h>
#include <stdio.h>
#include <stdlib.h>
#include <str.h>
#include <str_error.h>

#include "var.h"

loc_srv_t *hr_srv;
fibril_mutex_t big_lock; /* for now */

static fibril_mutex_t hr_volumes_lock;
static list_t hr_volumes;

static service_id_t ctl_sid;

static void hr_create_srv(ipc_call_t *icall)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_create_srv()");

        errno_t rc;
        size_t size;
        hr_config_t *cfg;
        hr_volume_t *new_volume;
        ipc_call_t call;

        if (!async_data_write_receive(&call, &size)) {
                async_answer_0(&call, EREFUSED);
                async_answer_0(icall, EREFUSED);
                return;
        }

        if (size != sizeof(hr_config_t)) {
                async_answer_0(&call, EINVAL);
                async_answer_0(icall, EINVAL);
                return;
        }

        cfg = calloc(1, sizeof(hr_config_t));
        if (cfg == NULL) {
                async_answer_0(&call, ENOMEM);
                async_answer_0(icall, ENOMEM);
                return;
        }

        rc = async_data_write_finalize(&call, cfg, size);
        if (rc != EOK) {
                async_answer_0(&call, rc);
                async_answer_0(icall, rc);
        }

        new_volume = calloc(1, sizeof(hr_volume_t));
        if (new_volume == NULL) {
                rc = ENOMEM;
                goto end;
        }

        str_cpy(new_volume->devname, 32, cfg->devname);
        memcpy(new_volume->devs, cfg->devs, sizeof(service_id_t) * HR_MAXDEVS);
        new_volume->level = cfg->level;
        new_volume->dev_no = cfg->dev_no;

        switch (new_volume->level) {
        case hr_l_1:
                new_volume->hr_ops.create = hr_raid1_create;
                break;
        case hr_l_0:
                new_volume->hr_ops.create = hr_raid0_create;
                break;
        default:
                log_msg(LOG_DEFAULT, LVL_NOTE,
                    "level %d not implemented yet\n", new_volume->level);
                rc = EINVAL;
                goto end;
        }

        rc = new_volume->hr_ops.create(new_volume);
        if (rc != EOK) {
                goto end;
        }

        fibril_mutex_lock(&hr_volumes_lock);
        list_append(&new_volume->lvolumes, &hr_volumes);
        fibril_mutex_unlock(&hr_volumes_lock);

        log_msg(LOG_DEFAULT, LVL_NOTE, "created volume \"%s\" (%" PRIun ")\n",
            new_volume->devname, new_volume->svc_id);

end:
        free(cfg);
        async_answer_0(icall, rc);
}

static void hr_ctl_conn(ipc_call_t *icall, void *arg)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_ctl_conn()");

        async_accept_0(icall);

        while (true) {
                ipc_call_t call;
                async_get_call(&call);
                sysarg_t method = ipc_get_imethod(&call);

                if (!method) {
                        async_answer_0(&call, EOK);
                        return;
                }

                switch (method) {
                case HR_CREATE:
                        hr_create_srv(&call);
                        break;
                default:
                        async_answer_0(&call, EINVAL);
                }
        }
}

static hr_volume_t *hr_get_volume(service_id_t svc_id)
{
        log_msg(LOG_DEFAULT, LVL_DEBUG, "hr_get_volume(): (%" PRIun ")",
            svc_id);

        fibril_mutex_lock(&hr_volumes_lock);
        list_foreach(hr_volumes, lvolumes, hr_volume_t, volume) {
                if (volume->svc_id == svc_id) {
                        fibril_mutex_unlock(&hr_volumes_lock);
                        return volume;
                }
        }

        fibril_mutex_unlock(&hr_volumes_lock);
        return NULL;
}

static void hr_client_conn(ipc_call_t *icall, void *arg)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_client_conn()");

        hr_volume_t *vol;

        service_id_t svc_id = ipc_get_arg2(icall);

        if (svc_id == ctl_sid) {
                hr_ctl_conn(icall, arg);
        } else {
                log_msg(LOG_DEFAULT, LVL_NOTE, "bd_conn()");
                vol = hr_get_volume(svc_id);
                if (vol == NULL)
                        async_answer_0(icall, EINVAL);
                bd_conn(icall, &vol->hr_bds);
        }
}

int main(int argc, char **argv)
{
        errno_t rc;

        printf("%s: HelenRAID server\n", NAME);

        rc = log_init(NAME);
        if (rc != EOK) {
                printf("%s: failed to initialize logging\n", NAME);
                return 1;
        }

        fibril_mutex_initialize(&big_lock);

        fibril_mutex_initialize(&hr_volumes_lock);
        list_initialize(&hr_volumes);

        async_set_fallback_port_handler(hr_client_conn, NULL);

        rc = loc_server_register(NAME, &hr_srv);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR,
                    "failed registering server: %s", str_error(rc));
                return EEXIST;
        }

        rc = loc_service_register(hr_srv, SERVICE_NAME_HR, &ctl_sid);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR,
                    "failed registering service: %s", str_error(rc));
                return EEXIST;
        }

        printf("%s: accepting connections\n", NAME);
        task_retval(0);
        async_manager();

        return 0;
}

/** @}
 */