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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _VSTRUCTS_H #define _VSTRUCTS_H #include "util.h" /* * NOTE: we can't differentiate between __le64 and u64 with type_is - this * assumes u64 is little endian: */ #define __vstruct_u64s(_s) \ ({ \ ( type_is((_s)->u64s, u64) ? le64_to_cpu((__force __le64) (_s)->u64s) \ : type_is((_s)->u64s, u32) ? le32_to_cpu((__force __le32) (_s)->u64s) \ : type_is((_s)->u64s, u16) ? le16_to_cpu((__force __le16) (_s)->u64s) \ : ((__force u8) ((_s)->u64s))); \ }) #define __vstruct_bytes(_type, _u64s) \ ({ \ BUILD_BUG_ON(offsetof(_type, _data) % sizeof(u64)); \ \ (size_t) (offsetof(_type, _data) + (_u64s) * sizeof(u64)); \ }) #define vstruct_bytes(_s) \ __vstruct_bytes(typeof(*(_s)), __vstruct_u64s(_s)) #define __vstruct_blocks(_type, _sector_block_bits, _u64s) \ (round_up(__vstruct_bytes(_type, _u64s), \ 512 << (_sector_block_bits)) >> (9 + (_sector_block_bits))) #define vstruct_blocks(_s, _sector_block_bits) \ __vstruct_blocks(typeof(*(_s)), _sector_block_bits, __vstruct_u64s(_s)) #define vstruct_blocks_plus(_s, _sector_block_bits, _u64s) \ __vstruct_blocks(typeof(*(_s)), _sector_block_bits, \ __vstruct_u64s(_s) + (_u64s)) #define vstruct_sectors(_s, _sector_block_bits) \ (round_up(vstruct_bytes(_s), 512 << (_sector_block_bits)) >> 9) #define vstruct_next(_s) \ ((typeof(_s)) ((u64 *) (_s)->_data + __vstruct_u64s(_s))) #define vstruct_last(_s) \ ((typeof(&(_s)->start[0])) ((u64 *) (_s)->_data + __vstruct_u64s(_s))) #define vstruct_end(_s) \ ((void *) ((u64 *) (_s)->_data + __vstruct_u64s(_s))) #define vstruct_for_each(_s, _i) \ for (typeof(&(_s)->start[0]) _i = (_s)->start; \ _i < vstruct_last(_s); \ _i = vstruct_next(_i)) #define vstruct_for_each_safe(_s, _i) \ for (typeof(&(_s)->start[0]) _next, _i = (_s)->start; \ _i < vstruct_last(_s) && (_next = vstruct_next(_i), true); \ _i = _next) #define vstruct_idx(_s, _idx) \ ((typeof(&(_s)->start[0])) ((_s)->_data + (_idx))) #endif /* _VSTRUCTS_H */ |