Refcount structures are placed in clusters randomly selected from all
unallocated host clusters.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Maria Kustova <maria.k@catit.be>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 7e2f38608db6fba2da53997390b19400d445c45d.1408450493.git.maria.k@catit.be
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Some issues can be found only when a fuzzed image has a partial structure,
e.g. has L1/L2 tables but no refcount ones. Generation of an entirely
defined image limits these cases. Now the Image constructor creates only
a header and a backing file name (if any), other image elements are generated
in the 'create_image' API.
Signed-off-by: Maria Kustova <maria.k@catit.be>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Entries in L1/L2 entries are based on a portion of random guest clusters.
L2 entries contain offsets to host image clusters filled with random data.
Clusters for L1/L2 tables and guest data are selected randomly.
Signed-off-by: Maria Kustova <maria.k@catit.be>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The layout submodule of the qcow2 package creates a random valid image,
randomly selects some amount of its fields, fuzzes them and write the fuzzed
image to the file. Fuzzing process can be controlled by an external
configuration.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Maria Kustova <maria.k@catit.be>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
