mirage / ocaml-qcow / 16

82%

Pull #7

travis-ci

Cope with files which are not whole numbers of clusters

`qemu-img` seems to "allocate" the final cluster in a file by writing
a single sector only. Cope with this by:

- on every `read`, check if we're in this last-cluster situation and
  synthesize zeroes for missing sectors
- on `connect`, round up to the next cluster size when setting the
  `next_cluster` pointer.

With this patch, a `qemu-img` generated .qcow2 seems to work ok with
this code as measured by the CLI `check` subcommand.

Signed-off-by: David Scott <dave.scott@unikernel.com>

17 of 17 new or added lines in 1 file covered. (100.0%)

460 of 574 relevant lines covered (80.14%)

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