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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)) ((_s)->_data + __vstruct_u64s(_s)))
#define vstruct_last(_s) \
((typeof(&(_s)->start[0])) ((_s)->_data + __vstruct_u64s(_s)))
#define vstruct_end(_s) \
((void *) ((_s)->_data + __vstruct_u64s(_s)))
#define vstruct_for_each(_s, _i) \
for (_i = (_s)->start; \
_i < vstruct_last(_s); \
_i = vstruct_next(_i))
#define vstruct_for_each_safe(_s, _i, _t) \
for (_i = (_s)->start; \
_i < vstruct_last(_s) && (_t = vstruct_next(_i), true); \
_i = _t)
#define vstruct_idx(_s, _idx) \
((typeof(&(_s)->start[0])) ((_s)->_data + (_idx)))
#endif /* _VSTRUCTS_H */
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