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Diffstat (limited to 'qapi/block-core.json')
| -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' ] } |