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kbase: incrementalbackupinternals: Add section on 'qemu-img bitmap' use

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Define what users should look for when wanting to manipulate bitmaps
themselves.

Later on a patch will turn the bash algorithms into pseudocode for
simplicity.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Peter Krempa 2020-06-24 11:34:16 +02:00
parent a4e81e0c32
commit abf20e65f7
1 changed files with 14 additions and 0 deletions
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14
docs/kbase/incrementalbackupinternals.rst
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@ -190,6 +190,20 @@ It's recommended to use ``--output=json`` parameter to work with a machine
readable output rather than trying to process the human readable output by readable output rather than trying to process the human readable output by
scripts. For processing JSON in shell the ``jq`` tool can be used. scripts. For processing JSON in shell the ``jq`` tool can be used.
The ``qemu-img bitmap`` command allows modification of block-dirty-bitmaps of an
offline image. It supports the following operations relevant to this document
(see man page for full list of operations):
``--add NAME``
Creates a new bitmap named ``NAME``. Optionally ``-g`` can be used to
specify granularity.
``--remove NAME``
Deletes bitmap ``NAME``.
``--merge SRCBITMAP -b SRCFILE -F SRCFILEFMT DSTBITMAP``
Merges bitmap ``SRCBITMAP`` from ``SRCFILE`` into ``DSTBITMAP``.
Checking bitmap health Checking bitmap health
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