[v1] fix image fleecing

[Qemu-devel] [PATCH 0/2] fix image fleecing

Vladimir Sementsov-Ogievskiy posted 2 patches 7 years, 4 months ago

Diff against v2 v3 v4 v5
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include/block/block.h |  5 ++++-
block/backup.c        | 21 ++++++++++++++++++---
block/io.c            |  4 ++++
3 files changed, 26 insertions(+), 4 deletions(-)

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[Qemu-devel] [PATCH 0/2] fix image fleecing

Posted by Vladimir Sementsov-Ogievskiy 7 years, 4 months ago

Hi all.

It's a continuation of discussion under
"[PATCH v2 2/3] block/fleecing-filter: new filter driver for fleecing" [1].

Here is my try to implement Kevin's idea, that all backup writes (for
fleecing case) should be serialized. (However, I've skipped for now
fixing related permissions).

Looks like these patches may replace patch [1], to make fleecing scheme
safe. But I'm not sure, a look by Kevin is necessary.

A test is still needed, to prove that this patch is necessary and that it
works..

Vladimir Sementsov-Ogievskiy (2):
  block: add BDRV_REQ_SERIALISING flag
  block/backup: fix fleecing scheme: use serialized writes

 include/block/block.h |  5 ++++-
 block/backup.c        | 21 ++++++++++++++++++---
 block/io.c            |  4 ++++
 3 files changed, 26 insertions(+), 4 deletions(-)

-- 
2.11.1