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block-backend: blk_check_byte_request(): int64_t bytes
Rename size and make it int64_t to correspond to modern block layer, which always uses int64_t for offset and bytes (not in blk layer yet, which is a task for following commits). All callers pass int or unsigned int. So, for bytes in [0, INT_MAX] nothing is changed, for negative bytes we now fail on "bytes < 0" check instead of "bytes > INT_MAX" check. Note, that blk_check_byte_request() still doesn't allow requests exceeding INT_MAX. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20211006131718.214235-2-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
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