source: mainline/uspace/srv/bd/hr/io.c@ f0950d2

/*
 * Copyright (c) 2025 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 <inttypes.h>
#include <stdio.h>
#include <str_error.h>

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

static errno_t exec_io_op(hr_io_t *);

errno_t hr_io_worker(void *arg)
{
        hr_io_t *io = arg;

        errno_t rc = exec_io_op(io);

        /*
         * We don't have to invalidate extents who got ENOMEM
         * on READ/SYNC. But when we get ENOMEM on a WRITE, we have
         * to invalidate it, because there could have been
         * other writes, there is no way to rollback.
         */
        if (rc != EOK && (rc != ENOMEM || io->type == HR_BD_WRITE))
                io->vol->hr_ops.ext_state_cb(io->vol, io->extent, rc);

        return rc;
}

errno_t hr_io_worker_basic(void *arg)
{
        hr_io_t *io = arg;

        errno_t rc = exec_io_op(io);

        return rc;
}

static errno_t exec_io_op(hr_io_t *io)
{
        size_t ext_idx = io->extent;
        hr_extent_t *extents = (hr_extent_t *)&io->vol->extents;
        errno_t rc;

        const char *debug_type_str = NULL;
        switch (io->type) {
        case HR_BD_SYNC:
                debug_type_str = "SYNC";
                break;
        case HR_BD_READ:
                debug_type_str = "READ";
                break;
        case HR_BD_WRITE:
                debug_type_str = "WRITE";
                break;
        }

        HR_DEBUG("%s WORKER (%p) on extent: %zu, ba: %" PRIu64 ", "
            "cnt: %" PRIu64 "\n",
            debug_type_str, io, io->extent, io->ba, io->cnt);

        switch (io->type) {
        case HR_BD_SYNC:
                rc = block_sync_cache(extents[ext_idx].svc_id,
                    io->ba, io->cnt);
                if (rc == ENOTSUP)
                        rc = EOK;
                break;
        case HR_BD_READ:
                rc = block_read_direct(extents[ext_idx].svc_id, io->ba,
                    io->cnt, io->data_read);
                break;
        case HR_BD_WRITE:
                rc = block_write_direct(extents[ext_idx].svc_id, io->ba,
                    io->cnt, io->data_write);
                break;
        default:
                return EINVAL;
        }

        HR_DEBUG("WORKER (%p) rc: %s\n", io, str_error(rc));

        return rc;
}

/** @}
 */