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| author | Hu Tao | 2014-09-10 11:05:47 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2014-09-12 15:43:06 +0200 |
| commit | ffeaac9b4e23a3033e8120cc34bacadc09487f1b (patch) | |
| tree | 1c76d91db7c14d786f21f10494aa3dbb3a1510dd /qapi | |
| parent | block: don't convert file size to sector size (diff) | |
| download | qemu-ffeaac9b4e23a3033e8120cc34bacadc09487f1b.tar.gz qemu-ffeaac9b4e23a3033e8120cc34bacadc09487f1b.tar.xz qemu-ffeaac9b4e23a3033e8120cc34bacadc09487f1b.zip | |
qapi: introduce PreallocMode and new PreallocModes full and falloc.
This patch prepares for the subsequent patches.
Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index 4064d5bf7d..95dcd81ed4 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1708,3 +1708,20 @@ 'len' : 'int', 'offset': 'int', 'speed' : 'int' } } + +# @PreallocMode +# +# Preallocation mode of QEMU image file +# +# @off: no preallocation +# @metadata: preallocate only for metadata +# @falloc: like @full preallocation but allocate disk space by +# posix_fallocate() rather than writing zeros. +# @full: preallocate all data by writing zeros to device to ensure disk +# space is really available. @full preallocation also sets up +# metadata correctly. +# +# Since 2.2 +## +{ 'enum': 'PreallocMode', + 'data': [ 'off', 'metadata', 'falloc', 'full' ] } |