| commit | 70d1cbae03b54995fdc99f9934c847a87125e4f5 | |
| author | Alberto Garcia <berto@igalia.com> | |
| Fri, 10 Jul 2020 16:12:57 +0000 (10 18:12 +0200) | ||
| committer | Max Reitz <mreitz@redhat.com> | |
| Tue, 25 Aug 2020 06:33:20 +0000 (25 08:33 +0200) | ||
| tree | 9276c1d9dd5519569ee3f4331610665d90e983c0 | treesnapshot (tar.gz zip) |
| parent | 34905d8eb1ef788a41a490cb1602582ff78cb6f4 | commitdiff |
qcow2: Add qcow2_get_subcluster_range_type()
There are situations in which we want to know how many contiguous
subclusters of the same type there are in a given cluster. This can be
done by simply iterating over the subclusters and repeatedly calling
qcow2_get_subcluster_type() for each one of them.
However once we determined the type of a subcluster we can check the
rest efficiently by counting the number of adjacent ones (or zeroes)
in the bitmap. This is what this function does.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <db917263d568ec6ffb4a41cac3c9100f96bf6c18.1594396418.git.berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
There are situations in which we want to know how many contiguous
subclusters of the same type there are in a given cluster. This can be
done by simply iterating over the subclusters and repeatedly calling
qcow2_get_subcluster_type() for each one of them.
However once we determined the type of a subcluster we can check the
rest efficiently by counting the number of adjacent ones (or zeroes)
in the bitmap. This is what this function does.
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <db917263d568ec6ffb4a41cac3c9100f96bf6c18.1594396418.git.berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
| block/qcow2-cluster.c | diffblobblamehistory |