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[Qemu-devel] [PATCH v2 0/2] qcow2: Snapshot update for zero clusters
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v2 0/2] qcow2: Snapshot update for zero clusters |
Date: |
Fri, 30 Aug 2013 10:36:42 +0200 |
When creating a snapshots, the refcount adjustment function basically
adjusted the refcounts of any cluster with a non-zero L2 entry. However,
the L2 entry of unallocated zero clusters is exactly one (therefore
non-zero) which led to wrong refcount updates on cluster 0 (the main
qcow2 header), since the cluster index for these unallocated zero clusters
is 0.
This series fixes this by taking all cluster types specifically into
account using qcow2_get_cluster_type and handling them accordingly.
Furthermore, a short test is added.
v2:
- more thorough commit message
- take pre-allocated zero clusters into account
- abort on unknown cluster type
- a test case
Max Reitz (2):
qcow2-refcount: Snapshot update for zero clusters
qemu-iotests: Snapshotting zero clusters
block/qcow2-refcount.c | 52 ++++++++++++++++++++++++++-------------
tests/qemu-iotests/062 | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/group | 1 +
3 files changed, 100 insertions(+), 17 deletions(-)
create mode 100755 tests/qemu-iotests/062
--
1.8.3.1
- [Qemu-devel] [PATCH v2 0/2] qcow2: Snapshot update for zero clusters,
Max Reitz <=