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From 615fbb1d8b28619f0a6a00cdaaa57d223670bf92 Mon Sep 17 00:00:00 2001
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From: John Snow <jsnow@redhat.com>
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Date: Wed, 3 Apr 2019 18:18:50 +0200
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Subject: [PATCH 145/163] block/dirty-bitmap: add inconsistent status
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RH-Author: John Snow <jsnow@redhat.com>
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Message-id: <20190403181857.9693-15-jsnow@redhat.com>
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Patchwork-id: 85411
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O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 14/21] block/dirty-bitmap: add inconsistent status
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Bugzilla: 1677073
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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Even though the status field is deprecated, we still have to support
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it for a few more releases. Since this is a very new kind of bitmap
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state, it makes sense for it to have its own status field.
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Signed-off-by: John Snow <jsnow@redhat.com>
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Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Message-id: 20190301191545.8728-3-jsnow@redhat.com
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Signed-off-by: John Snow <jsnow@redhat.com>
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(cherry picked from commit 0064cfefa4e90c11e394befb7abe47602f2f30d7)
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Signed-off-by: John Snow <jsnow@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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block/dirty-bitmap.c | 7 ++++++-
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qapi/block-core.json | 7 ++++++-
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2 files changed, 12 insertions(+), 2 deletions(-)
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diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
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index 096c1b7..4a2349d 100644
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--- a/block/dirty-bitmap.c
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+++ b/block/dirty-bitmap.c
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@@ -210,10 +210,15 @@ bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
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* or it can be Disabled and not recording writes.
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* (4) Locked: Whether Active or Disabled, the user cannot modify this bitmap
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* in any way from the monitor.
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+ * (5) Inconsistent: This is a persistent bitmap whose "in use" bit is set, and
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+ * is unusable by QEMU. It can be deleted to remove it from
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+ * the qcow2.
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*/
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DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
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{
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- if (bdrv_dirty_bitmap_has_successor(bitmap)) {
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+ if (bdrv_dirty_bitmap_inconsistent(bitmap)) {
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+ return DIRTY_BITMAP_STATUS_INCONSISTENT;
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+ } else if (bdrv_dirty_bitmap_has_successor(bitmap)) {
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return DIRTY_BITMAP_STATUS_FROZEN;
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} else if (bdrv_dirty_bitmap_busy(bitmap)) {
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return DIRTY_BITMAP_STATUS_LOCKED;
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diff --git a/qapi/block-core.json b/qapi/block-core.json
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index 92a42ef..c84144d 100644
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--- a/qapi/block-core.json
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+++ b/qapi/block-core.json
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@@ -443,10 +443,15 @@
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# recording new writes. If the bitmap was @disabled, it is not
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# recording new writes. (Since 2.12)
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#
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+# @inconsistent: This is a persistent dirty bitmap that was marked in-use on
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+# disk, and is unusable by QEMU. It can only be deleted.
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+# Please rely on the inconsistent field in @BlockDirtyInfo
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+# instead, as the status field is deprecated. (Since 4.0)
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+#
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# Since: 2.4
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##
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{ 'enum': 'DirtyBitmapStatus',
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- 'data': ['active', 'disabled', 'frozen', 'locked'] }
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+ 'data': ['active', 'disabled', 'frozen', 'locked', 'inconsistent'] }
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##
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# @BlockDirtyInfo:
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--
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1.8.3.1
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