1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright (C) 2022 Intel Corporation. 3 * All rights reserved. 4 */ 5 6 #ifndef FTL_SB_CURRENT_H 7 #define FTL_SB_CURRENT_H 8 9 #include "spdk/uuid.h" 10 #include "ftl_sb_common.h" 11 12 #define FTL_SB_VERSION_4 4 13 #define FTL_SB_VERSION_CURRENT FTL_SB_VERSION_4 14 15 struct ftl_superblock { 16 struct ftl_superblock_header header; 17 18 struct spdk_uuid uuid; 19 20 /* Current sequence number */ 21 uint64_t seq_id; 22 23 /* Flag describing clean shutdown */ 24 uint64_t clean; 25 26 /* Number of surfaced LBAs */ 27 uint64_t lba_cnt; 28 29 /* Percentage of base device blocks not exposed to the user */ 30 uint64_t overprovisioning; 31 32 /* Maximum IO depth per band relocate */ 33 uint64_t max_reloc_qdepth; 34 35 /* Reserved field */ 36 uint8_t reserved3[16]; 37 38 /* Last L2P checkpoint +1 (i.e. min_seq_id, 0:no ckpt) */ 39 uint64_t ckpt_seq_id; 40 41 struct ftl_superblock_gc_info gc_info; 42 43 struct ftl_superblock_md_region md_layout_head; 44 } __attribute__((packed)); 45 46 SPDK_STATIC_ASSERT(offsetof(struct ftl_superblock, header) == 0, 47 "Invalid placement of header"); 48 49 SPDK_STATIC_ASSERT(FTL_SUPERBLOCK_SIZE >= sizeof(struct ftl_superblock), 50 "FTL SB metadata size is invalid"); 51 52 #endif /* FTL_SB_CURRENT_H */ 53