source: mainline/uspace/srv/bd/vbd/vbd.c@ 22fb7ab

/*
 * Copyright (c) 2015 Jiri Svoboda
 * 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 vbd
 * @{
 */
/**
 * @file
 */

#include <async.h>
#include <errno.h>
#include <io/log.h>
#include <ipc/services.h>
#include <ipc/vbd.h>
#include <loc.h>
#include <stdio.h>
#include <stdlib.h>
#include <task.h>

#include "types/vbd.h"

#define NAME  "vbd"

static void vbd_client_conn(ipc_callid_t, ipc_call_t *, void *);

static int vbd_init(void)
{
        int rc;
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_init()");

        async_set_client_connection(vbd_client_conn);

        rc = loc_server_register(NAME);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering server (%d).", rc);
                return EEXIST;
        }

        service_id_t sid;
        rc = loc_service_register(SERVICE_NAME_VBD, &sid);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR, "Failed registering service (%d).", rc);
                return EEXIST;
        }

        return EOK;
}

static int vbd_disk_add(service_id_t sid)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_disk_add(%zu)", sid);
        return EOK;
}

static int vbd_disk_remove(service_id_t sid)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_disk_remove(%zu)", sid);
        return EOK;
}

static int vbd_disk_info(service_id_t sid, vbd_disk_info_t *info)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_disk_info(%zu)", sid);
        info->ltype = lt_mbr;
        return EOK;
}

static int vbd_label_create(service_id_t sid, label_type_t ltype)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_label_create(%zu, %d)", sid,
            ltype);
        return EOK;
}

static int vbd_label_delete(service_id_t sid, label_type_t ltype)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_label_delete(%zu, %d)", sid,
            ltype);
        return EOK;
}

static void vbd_disk_add_srv(ipc_callid_t iid, ipc_call_t *icall)
{
        service_id_t disk_sid;
        int rc;

        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_disk_add_srv()");

        disk_sid = IPC_GET_ARG1(*icall);
        rc = vbd_disk_add(disk_sid);
        async_answer_0(iid, (sysarg_t) rc);
}

static void vbd_disk_remove_srv(ipc_callid_t iid, ipc_call_t *icall)
{
        service_id_t disk_sid;
        int rc;

        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_disk_remove_srv()");

        disk_sid = IPC_GET_ARG1(*icall);
        rc = vbd_disk_remove(disk_sid);
        async_answer_0(iid, (sysarg_t) rc);
}

static void vbd_disk_info_srv(ipc_callid_t iid, ipc_call_t *icall)
{
        service_id_t disk_sid;
        vbd_disk_info_t dinfo;
        int rc;

        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_disk_info_srv()");

        disk_sid = IPC_GET_ARG1(*icall);
        rc = vbd_disk_info(disk_sid, &dinfo);
        async_answer_1(iid, (sysarg_t)rc, (sysarg_t)dinfo.ltype);
}

static void vbd_label_create_srv(ipc_callid_t iid, ipc_call_t *icall)
{
        service_id_t disk_sid;
        label_type_t ltype;
        int rc;

        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_label_create_srv()");

        disk_sid = IPC_GET_ARG1(*icall);
        ltype = IPC_GET_ARG2(*icall);
        rc = vbd_label_create(disk_sid, ltype);
        async_answer_0(iid, (sysarg_t) rc);
}

static void vbd_label_delete_srv(ipc_callid_t iid, ipc_call_t *icall)
{
        service_id_t disk_sid;
        label_type_t ltype;
        int rc;

        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_label_delete_srv()");

        disk_sid = IPC_GET_ARG1(*icall);
        ltype = IPC_GET_ARG2(*icall);
        rc = vbd_label_delete(disk_sid, ltype);
        async_answer_0(iid, (sysarg_t) rc);
}

static void vbd_client_conn(ipc_callid_t iid, ipc_call_t *icall, void *arg)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "vbd_client_conn()");

        /* Accept the connection */
        async_answer_0(iid, EOK);

        while (true) {
                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);
                sysarg_t method = IPC_GET_IMETHOD(call);

                if (!method) {
                        /* The other side has hung up */
                        async_answer_0(callid, EOK);
                        return;
                }

                switch (method) {
                case VBD_DISK_ADD:
                        vbd_disk_add_srv(callid, &call);
                        break;
                case VBD_DISK_REMOVE:
                        vbd_disk_remove_srv(callid, &call);
                        break;
                case VBD_DISK_INFO:
                        vbd_disk_info_srv(callid, &call);
                        break;
                case VBD_LABEL_CREATE:
                        vbd_label_create_srv(callid, &call);
                        break;
                case VBD_LABEL_DELETE:
                        vbd_label_delete_srv(callid, &call);
                        break;
                default:
                        async_answer_0(callid, EINVAL);
                }
        }
}

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

        printf("%s: Virtual Block Device service\n", NAME);

        if (log_init(NAME) != EOK) {
                printf(NAME ": Failed to initialize logging.\n");
                return 1;
        }

        rc = vbd_init();
        if (rc != EOK)
                return 1;

        printf(NAME ": Accepting connections.\n");
        task_retval(0);
        async_manager();

        return 0;
}

/** @}
 */