920c1cca18
Don't rely on compiler for metadata packing to 4KiB size and add reserved fields manually. For compatibility reasons against metadata relying on automatic padding the reserved fields are also added in-between existing fields as needed. Signed-off-by: Kozlowski Mateusz <mateusz.kozlowski@intel.com> Change-Id: I5e342d5bf5948c213d455590d09597ae120b3c62 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/14307 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* 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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#ifndef FTL_SB_CURRENT_H
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#define FTL_SB_CURRENT_H
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#include "spdk/uuid.h"
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#include "ftl_sb_common.h"
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#define FTL_SB_VERSION_4 4
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#define FTL_SB_VERSION_CURRENT FTL_SB_VERSION_4
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struct ftl_superblock {
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struct ftl_superblock_header header;
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struct spdk_uuid uuid;
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/* Current sequence number */
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uint64_t seq_id;
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/* Flag describing clean shutdown */
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uint64_t clean;
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/* Number of surfaced LBAs */
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uint64_t lba_cnt;
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/* Percentage of base device blocks not exposed to the user */
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uint64_t overprovisioning;
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/* Maximum IO depth per band relocate */
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uint64_t max_reloc_qdepth;
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/* Reserved field */
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uint8_t reserved3[16];
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/* Last L2P checkpoint +1 (i.e. min_seq_id, 0:no ckpt) */
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uint64_t ckpt_seq_id;
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struct ftl_superblock_gc_info gc_info;
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struct ftl_superblock_md_region md_layout_head;
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} __attribute__((packed));
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SPDK_STATIC_ASSERT(offsetof(struct ftl_superblock, header) == 0,
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"Invalid placement of header");
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SPDK_STATIC_ASSERT(FTL_SUPERBLOCK_SIZE >= sizeof(struct ftl_superblock),
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"FTL SB metadata size is invalid");
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#endif /* FTL_SB_CURRENT_H */
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