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sheepdog: selectable object size support

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Previously, qemu block driver of sheepdog used hard-coded VDI object size.
This patch enables users to handle VDI object size.

When you start qemu, you don't need to specify additional command option.

But when you create the VDI which doesn't have default object size
with qemu-img command, you specify object_size option.

If you want to create a VDI of 8MB object size,
you need to specify following command option.

 # qemu-img create -o object_size=8M sheepdog:test1 100M

In addition, when you don't specify qemu-img command option,
a default value of sheepdog cluster is used for creating VDI.

 # qemu-img create sheepdog:test2 100M

Signed-off-by: Teruaki Ishizaki <ishizaki.teruaki@lab.ntt.co.jp>
Acked-by: Hitoshi Mitake <mitake.hitoshi@lab.ntt.co.jp>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Teruaki Ishizaki 2015-02-13 18:20:53 +09:00 • committed by Kevin Wolf
parent 0cc8488706
commit 876eb1b0cc
2 changed files with 134 additions and 22 deletions
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1
include/block/block_int.h
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@ -56,6 +56,7 @@
#define BLOCK_OPT_ADAPTER_TYPE "adapter_type"
#define BLOCK_OPT_REDUNDANCY "redundancy"
#define BLOCK_OPT_NOCOW "nocow"
#define BLOCK_OPT_OBJECT_SIZE "object_size"
#define BLOCK_PROBE_BUF_SIZE 512