Is used by zinfo_t and contains information about the size of the block.
struct { size_t size; off_t sizeShift; } blockSize;
Specifies the logical size (which is always a power of 2 and a multiple of the underlying storage pool allocation unit size) of the file object's allocation blocks.
Specifies the shift factor that is used in working with the size of the block. If size is 2 raised to the nth power, the value of sizeShift is "n". If 1 is shifted left by this value, the resultant value is the same value as size.
This structure is ignored by the FSHOOK_TYPE_MODIFYINFO_REPORT event.