haraldwolff/qemu-patch-raspberry4
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Jeff Cody 30af51ce7f block: vhdx - change .vhdx_create default block state to ZERO 
The VHDX spec specifies that the default new block state is
PAYLOAD_BLOCK_NOT_PRESENT for a dynamic VHDX image, and
PAYLOAD_BLOCK_FULLY_PRESENT for a fixed VHDX image.

However, in order to create space-efficient VHDX images with qemu-img
convert, it is desirable to be able to set has_zero_init to true for
VHDX.

There is currently an option when creating VHDX images, to use block
state ZERO for new blocks.  However, this currently defaults to 'off'.
In order to be able to eventually set has_zero_init to true for VHDX,
this needs to default to 'on'.

This patch changes the default to 'on', and provides some help
information to warn against setting it to 'off' when using qemu-img
convert.

[Max Reitz pointed out that a full stop was missing at the end of the
VHDX_BLOCK_OPT_ZERO option help text.  I have added it.
--Stefan]

Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 85164899eacc86e150c3ceba793cf93b398dedd7.1418018421.git.jcody@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-12-12 15:42:49 +00:00
..
accounting.c block: do not use get_clock() 2014-12-10 10:31:13 +01:00
archipelago.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
backup.c block: let backup blockjob run in BDS AioContext 2014-11-03 11:41:49 +00:00
blkdebug.c blkdebug: Simplify and improve filename generation 2014-12-10 10:31:11 +01:00
blkverify.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
block-backend.c block: Add blk_add_close_notifier() for BB 2014-12-10 10:31:12 +01:00
bochs.c block: Use g_new() & friends to avoid multiplying sizes 2014-08-20 11:51:28 +02:00
cloop.c cloop: Handle failure for potentially large allocations 2014-08-15 15:07:15 +02:00
commit.c block: let commit blockjob run in BDS AioContext 2014-11-03 11:41:49 +00:00
curl.c block/curl: Improve type safety of s->timeout. 2014-11-03 11:41:47 +00:00
dmg.c dmg: Handle failure for potentially large allocations 2014-08-15 15:07:15 +02:00
gluster.c block: don't convert file size to sector size 2014-09-12 15:43:06 +02:00
iscsi.c -----BEGIN PGP SIGNATURE----- 2014-11-03 18:34:09 +00:00
linux-aio.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
Makefile.objs qemu-img: Implement commit like QMP 2014-11-03 11:41:48 +00:00
mirror.c block: let mirror blockjob run in BDS AioContext 2014-11-03 11:41:49 +00:00
nbd-client.c nbd: implement .bdrv_detach/attach_aio_context() 2014-06-04 09:56:11 +02:00
nbd-client.h nbd: implement .bdrv_detach/attach_aio_context() 2014-06-04 09:56:11 +02:00
nbd.c nbd: Fix filename generation 2014-10-20 13:41:26 +02:00
nfs.c block/nfs: Add create_opts 2014-12-10 10:31:19 +01:00
null.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
parallels.c block/parallels: fix access to not initialized memory in catalog_bitmap 2014-11-03 09:48:41 +00:00
qapi.c block/qapi: Add cache information to query-block 2014-12-10 10:31:09 +01:00
qcow.c block: Eliminate BlockDriverState member device_name[] 2014-10-20 13:41:26 +02:00
qcow2-cache.c qcow2: Use g_try_new0() for cache array 2014-08-20 11:51:28 +02:00
qcow2-cluster.c qcow2: Prevent numerical overflow 2014-12-10 10:31:20 +01:00
qcow2-refcount.c block/qcow2: Make get_refcount() global 2014-11-03 11:41:49 +00:00
qcow2-snapshot.c qcow2: Allow "full" discard 2014-11-03 11:41:47 +00:00
qcow2.c qcow2: Respect bdrv_truncate() error 2014-12-10 10:31:20 +01:00
qcow2.h block/qcow2: Make get_refcount() global 2014-11-03 11:41:49 +00:00
qed-check.c block: Use g_new() & friends to avoid multiplying sizes 2014-08-20 11:51:28 +02:00
qed-cluster.c Use glib memory allocation and free functions 2011-08-20 23:01:08 -05:00
qed-gencb.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
qed-l2-cache.c qed: do not evict in-use L2 table cache entries 2012-03-12 15:14:06 +01:00
qed-table.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
qed.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
qed.h block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
quorum.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
raw-aio.h block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00
raw-posix.c block/raw-posix: Fix ret in raw_open_common() 2014-12-10 10:31:20 +01:00
raw-win32.c block: Make essential BlockDriver objects public 2014-12-10 10:31:19 +01:00
raw_bsd.c block: Make essential BlockDriver objects public 2014-12-10 10:31:19 +01:00
rbd.c block/rbd: fix memory leak 2014-12-12 13:16:56 +00:00
sheepdog.c block: Rename BlockDriverAIOCB* to BlockAIOCB* 2014-10-20 13:41:27 +02:00
snapshot.c snapshot: add bdrv_drain_all() to bdrv_snapshot_delete() to avoid concurrency problem 2014-11-03 09:48:42 +00:00
ssh.c ssh: Don't crash if either host or path is not specified. 2014-10-03 10:30:33 +01:00
stream.c block: let stream blockjob run in BDS AioContext 2014-11-03 11:41:49 +00:00
vdi.c block: remove BLOCK_OPT_NOCOW from vdi_create_opts 2014-12-10 10:31:20 +01:00
vhdx-endian.c block: VHDX endian fixes 2014-08-15 15:07:14 +02:00
vhdx-log.c block: Drop some superfluous casts from void * 2014-08-20 11:51:28 +02:00
vhdx.c block: vhdx - change .vhdx_create default block state to ZERO 2014-12-12 15:42:49 +00:00
vhdx.h block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec 2014-12-12 15:42:22 +00:00
vmdk.c vmdk: Fix error for JSON descriptor file names 2014-12-12 13:14:10 +00:00
vpc.c block: remove BLOCK_OPT_NOCOW from vpc_create_opts 2014-12-10 10:31:21 +01:00
vvfat.c block/vvfat: qcow driver may not be found 2014-12-10 10:31:19 +01:00
win32-aio.c block: Rename BlockDriverCompletionFunc to BlockCompletionFunc 2014-10-20 13:41:27 +02:00