87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*/
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#include "bdev_raid.h"
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#include "spdk/env.h"
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#include "spdk/thread.h"
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#include "spdk/string.h"
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#include "spdk/util.h"
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#include "spdk/log.h"
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struct raid5f_info {
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/* The parent raid bdev */
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struct raid_bdev *raid_bdev;
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/* Number of data blocks in a stripe (without parity) */
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uint64_t stripe_blocks;
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/* Number of stripes on this array */
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uint64_t total_stripes;
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};
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static inline uint8_t
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raid5f_stripe_data_chunks_num(const struct raid_bdev *raid_bdev)
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{
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return raid_bdev->num_base_bdevs - raid_bdev->module->base_bdevs_max_degraded;
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}
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static void
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raid5f_submit_rw_request(struct raid_bdev_io *raid_io)
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{
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raid_bdev_io_complete(raid_io, SPDK_BDEV_IO_STATUS_FAILED);
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}
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static int
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raid5f_start(struct raid_bdev *raid_bdev)
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{
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uint64_t min_blockcnt = UINT64_MAX;
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struct raid_base_bdev_info *base_info;
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struct raid5f_info *r5f_info;
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r5f_info = calloc(1, sizeof(*r5f_info));
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if (!r5f_info) {
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SPDK_ERRLOG("Failed to allocate r5f_info\n");
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return -ENOMEM;
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}
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r5f_info->raid_bdev = raid_bdev;
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RAID_FOR_EACH_BASE_BDEV(raid_bdev, base_info) {
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min_blockcnt = spdk_min(min_blockcnt, base_info->bdev->blockcnt);
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}
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r5f_info->total_stripes = min_blockcnt / raid_bdev->strip_size;
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r5f_info->stripe_blocks = raid_bdev->strip_size * raid5f_stripe_data_chunks_num(raid_bdev);
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raid_bdev->bdev.blockcnt = r5f_info->stripe_blocks * r5f_info->total_stripes;
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raid_bdev->bdev.optimal_io_boundary = r5f_info->stripe_blocks;
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raid_bdev->bdev.split_on_optimal_io_boundary = true;
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raid_bdev->module_private = r5f_info;
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return 0;
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}
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static void
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raid5f_stop(struct raid_bdev *raid_bdev)
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{
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struct raid5f_info *r5f_info = raid_bdev->module_private;
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free(r5f_info);
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}
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static struct raid_bdev_module g_raid5f_module = {
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.level = RAID5F,
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.base_bdevs_min = 3,
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.base_bdevs_max_degraded = 1,
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.start = raid5f_start,
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.stop = raid5f_stop,
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.submit_rw_request = raid5f_submit_rw_request,
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};
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RAID_MODULE_REGISTER(&g_raid5f_module)
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SPDK_LOG_REGISTER_COMPONENT(bdev_raid5f)
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