== single block write
online: 1
offline: 0
st_blocks: 8
== single block overwrite
online: 1
offline: 0
st_blocks: 8
== append
online: 2
offline: 0
st_blocks: 16
== release
online: 0
offline: 2
st_blocks: 16
== duplicate release
online: 0
offline: 2
st_blocks: 16
== duplicate release past i_size
online: 0
offline: 2
st_blocks: 16
== stage
online: 2
offline: 0
st_blocks: 16
== duplicate stage
online: 2
offline: 0
st_blocks: 16
== larger file
online: 256
offline: 0
st_blocks: 2048
== partial truncate
online: 128
offline: 0
st_blocks: 1024
== single sparse block
online: 1
offline: 0
st_blocks: 8
== empty file
online: 0
offline: 0
st_blocks: 0
== non-regular file
online: 0
offline: 0
st_blocks: 0
== cleanup