source: mainline/uspace/srv/bd/hr/util.c@ dbd91da

/*
 * 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 <block.h>
#include <errno.h>
#include <hr.h>
#include <io/log.h>
#include <loc.h>
#include <stdlib.h>
#include <stdio.h>
#include <str_error.h>

#include "util.h"
#include "var.h"

extern loc_srv_t *hr_srv;

errno_t hr_init_devs(hr_volume_t *vol)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_init_devs()");

        errno_t rc;
        size_t i;

        for (i = 0; i < vol->dev_no; i++) {
                rc = block_init(vol->extents[i].svc_id);
                log_msg(LOG_DEFAULT, LVL_DEBUG,
                    "hr_init_devs(): initing (%" PRIun ")", vol->extents[i].svc_id);
                if (rc != EOK) {
                        log_msg(LOG_DEFAULT, LVL_ERROR,
                            "hr_init_devs(): initing (%" PRIun ") failed, aborting",
                            vol->extents[i].svc_id);
                        break;
                }
        }

        return rc;
}

void hr_fini_devs(hr_volume_t *vol)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_fini_devs()");

        size_t i;

        for (i = 0; i < vol->dev_no; i++)
                block_fini(vol->extents[i].svc_id);
}

errno_t hr_register_volume(hr_volume_t *new_volume)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_register_volume()");

        errno_t rc;
        service_id_t new_id;
        category_id_t cat_id;
        char *fullname = NULL;

        if (asprintf(&fullname, "devices/%s", new_volume->devname) < 0)
                return ENOMEM;

        rc = loc_service_register(hr_srv, fullname, &new_id);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR,
                    "unable to register device \"%s\": %s\n",
                    new_volume->devname, str_error(rc));
                goto error;
        }

        rc = loc_category_get_id("raid", &cat_id, IPC_FLAG_BLOCKING);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR,
                    "failed resolving category \"raid\": %s\n", str_error(rc));
                goto error;
        }

        rc = loc_service_add_to_cat(hr_srv, new_id, cat_id);
        if (rc != EOK) {
                log_msg(LOG_DEFAULT, LVL_ERROR,
                    "failed adding \"%s\" to category \"raid\": %s\n",
                    new_volume->devname, str_error(rc));
                goto error;
        }

        new_volume->svc_id = new_id;

error:
        free(fullname);
        return rc;
}

errno_t hr_check_devs(hr_volume_t *vol)
{
        log_msg(LOG_DEFAULT, LVL_NOTE, "hr_check_devs()");

        errno_t rc;
        size_t i, bsize, last_bsize;
        uint64_t nblocks, last_nblocks;
        uint64_t total_blocks = 0;

        for (i = 0; i < vol->dev_no; i++) {
                rc = block_get_nblocks(vol->extents[i].svc_id, &nblocks);
                if (rc != EOK)
                        goto error;
                if (i != 0 && nblocks != last_nblocks) {
                        log_msg(LOG_DEFAULT, LVL_ERROR,
                            "number of blocks differs");
                        rc = EINVAL;
                        goto error;
                }
                total_blocks += nblocks;
                last_nblocks = nblocks;
        }

        for (i = 0; i < vol->dev_no; i++) {
                rc = block_get_bsize(vol->extents[i].svc_id, &bsize);
                if (rc != EOK)
                        goto error;
                if (i != 0 && bsize != last_bsize) {
                        log_msg(LOG_DEFAULT, LVL_ERROR, "block sizes differ");
                        rc = EINVAL;
                        goto error;
                }
                last_bsize = bsize;
        }

        if (vol->level == hr_l_1) {
                vol->nblocks = total_blocks / vol->dev_no;
        } else if (vol->level == hr_l_0 || vol->level == hr_l_4) {
                vol->nblocks = total_blocks;
        } else {
                log_msg(LOG_DEFAULT, LVL_DEBUG, "unkown level, ok when assembling");
                vol->nblocks = 0;
        }

        vol->bsize = bsize;

error:
        return rc;
}

errno_t hr_check_ba_range(hr_volume_t *vol, size_t cnt, uint64_t ba)
{
        if (ba + cnt > vol->data_blkno)
                return ERANGE;
        return EOK;
}

void hr_add_ba_offset(hr_volume_t *vol, uint64_t *ba)
{
        *ba = *ba + vol->data_offset;
}

/** @}
 */