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qemu-img.texi: Be specific about JSON object types

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Just writing that --output=json outputs JSON information does not really
help; we should also make a note of what QAPI type the result object
has.  (The map subcommand does not emit a QAPI-typed object, but its
section already describes the object structure well enough.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2019-05-15 09:59:16 +02:00 committed by Kevin Wolf
parent 2fab30c80b
commit 987402c5c2
1 changed files with 8 additions and 3 deletions
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qemu-img.texi
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@ -230,6 +230,7 @@ overridden with a pattern byte specified by @var{pattern}.
Perform a consistency check on the disk image @var{filename}. The command can
output in the format @var{ofmt} which is either @code{human} or @code{json}.
The JSON output is an object of QAPI type @code{ImageCheck}.
If @code{-r} is specified, qemu-img tries to repair any inconsistencies found
during the check. @code{-r leaks} repairs only cluster leaks, whereas
@ -406,8 +407,7 @@ The size syntax is similar to dd(1)'s size syntax.
Give information about the disk image @var{filename}. Use it in
particular to know the size reserved on disk which can be different
from the displayed size. If VM snapshots are stored in the disk image,
they are displayed too. The command can output in the format @var{ofmt}
which is either @code{human} or @code{json}.
they are displayed too.
If a disk image has a backing file chain, information about each disk image in
the chain can be recursively enumerated by using the option @code{--backing-chain}.
@ -424,6 +424,10 @@ To enumerate information about each disk image in the above chain, starting from
qemu-img info --backing-chain snap2.qcow2
@end example
The command can output in the format @var{ofmt} which is either @code{human} or
@code{json}. The JSON output is an object of QAPI type @code{ImageInfo}; with
@code{--backing-chain}, it is an array of @code{ImageInfo} objects.
@item map [--object @var{objectdef}] [--image-opts] [-f @var{fmt}] [--output=@var{ofmt}] [-U] @var{filename}
Dump the metadata of image @var{filename} and its backing file chain.
@ -485,7 +489,8 @@ Calculate the file size required for a new image. This information can be used
to size logical volumes or SAN LUNs appropriately for the image that will be
placed in them. The values reported are guaranteed to be large enough to fit
the image. The command can output in the format @var{ofmt} which is either
@code{human} or @code{json}.
@code{human} or @code{json}. The JSON output is an object of QAPI type
@code{BlockMeasureInfo}.
If the size @var{N} is given then act as if creating a new empty image file
using @command{qemu-img create}. If @var{filename} is given then act as if