51 lines
1.4 KiB
C
51 lines
1.4 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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#ifndef FTL_SB_COMMON_H
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#define FTL_SB_COMMON_H
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#include "spdk/stdinc.h"
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#include "utils/ftl_defs.h"
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/* Size of superblock on NV cache, make it bigger for future fields */
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#define FTL_SUPERBLOCK_SIZE (128ULL * KiB)
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#define FTL_MAGIC(a, b, c, d) \
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((UINT64_C(a) << 48) | (UINT64_C(b) << 32) | (UINT64_C(c) << 16) | \
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UINT64_C(d))
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/**
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* Magic number identifies FTL superblock
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*/
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#define FTL_SUPERBLOCK_MAGIC FTL_MAGIC(0x1410, 0x1683, 0x1920, 0x1989)
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struct ftl_superblock_gc_info {
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/* High priority band; if there's no free bands after dirty shutdown, don't restart GC from same id, or phys_id -
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* pick actual lowest validity band to avoid being stuck and try to write it to the open band.
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*/
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uint64_t band_id_high_prio;
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/* Currently relocated band (note it's just id, not seq_id ie. its actual location on disk) */
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uint64_t current_band_id;
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/* Bands are grouped together into larger reclaim units; this is the band id translated to those units */
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uint64_t band_phys_id;
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/* May be updating multiple fields at the same time, clearing/setting this marks the transaction */
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uint64_t is_valid;
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};
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struct ftl_superblock_header {
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uint64_t magic;
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uint64_t crc;
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uint64_t version;
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};
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struct ftl_superblock_md_region {
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uint32_t type;
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uint32_t version;
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uint64_t blk_offs;
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uint64_t blk_sz;
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};
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#endif /* FTL_SB_COMMON_H */
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