1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _VSTRUCTS_H 3 #define _VSTRUCTS_H 4 5 #include "util.h" 6 7 /* 8 * NOTE: we can't differentiate between __le64 and u64 with type_is - this 9 * assumes u64 is little endian: 10 */ 11 #define __vstruct_u64s(_s) \ 12 ({ \ 13 ( type_is((_s)->u64s, u64) ? le64_to_cpu((__force __le64) (_s)->u64s) \ 14 : type_is((_s)->u64s, u32) ? le32_to_cpu((__force __le32) (_s)->u64s) \ 15 : type_is((_s)->u64s, u16) ? le16_to_cpu((__force __le16) (_s)->u64s) \ 16 : ((__force u8) ((_s)->u64s))); \ 17 }) 18 19 #define __vstruct_bytes(_type, _u64s) \ 20 ({ \ 21 BUILD_BUG_ON(offsetof(_type, _data) % sizeof(u64)); \ 22 \ 23 (size_t) (offsetof(_type, _data) + (_u64s) * sizeof(u64)); \ 24 }) 25 26 #define vstruct_bytes(_s) \ 27 __vstruct_bytes(typeof(*(_s)), __vstruct_u64s(_s)) 28 29 #define __vstruct_blocks(_type, _sector_block_bits, _u64s) \ 30 (round_up(__vstruct_bytes(_type, _u64s), \ 31 512 << (_sector_block_bits)) >> (9 + (_sector_block_bits))) 32 33 #define vstruct_blocks(_s, _sector_block_bits) \ 34 __vstruct_blocks(typeof(*(_s)), _sector_block_bits, __vstruct_u64s(_s)) 35 36 #define vstruct_blocks_plus(_s, _sector_block_bits, _u64s) \ 37 __vstruct_blocks(typeof(*(_s)), _sector_block_bits, \ 38 __vstruct_u64s(_s) + (_u64s)) 39 40 #define vstruct_sectors(_s, _sector_block_bits) \ 41 (round_up(vstruct_bytes(_s), 512 << (_sector_block_bits)) >> 9) 42 43 #define vstruct_next(_s) \ 44 ((typeof(_s)) ((u64 *) (_s)->_data + __vstruct_u64s(_s))) 45 #define vstruct_last(_s) \ 46 ((typeof(&(_s)->start[0])) ((u64 *) (_s)->_data + __vstruct_u64s(_s))) 47 #define vstruct_end(_s) \ 48 ((void *) ((u64 *) (_s)->_data + __vstruct_u64s(_s))) 49 50 #define vstruct_for_each(_s, _i) \ 51 for (typeof(&(_s)->start[0]) _i = (_s)->start; \ 52 _i < vstruct_last(_s); \ 53 _i = vstruct_next(_i)) 54 55 #define vstruct_for_each_safe(_s, _i) \ 56 for (typeof(&(_s)->start[0]) _next, _i = (_s)->start; \ 57 _i < vstruct_last(_s) && (_next = vstruct_next(_i), true); \ 58 _i = _next) 59 60 #define vstruct_idx(_s, _idx) \ 61 ((typeof(&(_s)->start[0])) ((_s)->_data + (_idx))) 62 63 #endif /* _VSTRUCTS_H */ 64