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From bdb24120ae9af1944a3b9d50ec9830ec075d5cf0 Mon Sep 17 00:00:00 2001
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From: John Snow <jsnow@redhat.com>
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Date: Wed, 18 Jul 2018 22:54:38 +0200
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Subject: [PATCH 220/268] qapi: add x-block-dirty-bitmap-enable/disable
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RH-Author: John Snow <jsnow@redhat.com>
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Message-id: <20180718225511.14878-3-jsnow@redhat.com>
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Patchwork-id: 81406
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O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH 02/35] qapi: add x-block-dirty-bitmap-enable/disable
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Bugzilla: 1207657
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RH-Acked-by: Eric Blake <eblake@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Expose the ability to turn bitmaps "on" or "off". This is experimental
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and principally for the sake of the Libvirt Checkpoints API, and it may
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or may not be committed for 3.0.
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Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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Signed-off-by: John Snow <jsnow@redhat.com>
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Reviewed-by: Jeff Cody <jcody@redhat.com>
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Message-id: 20180606182449.1607-3-jsnow@redhat.com
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Signed-off-by: John Snow <jsnow@redhat.com>
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(cherry picked from commit 5c5d2e50e5ac85234d793f0127a20ea3424a1229)
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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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blockdev.c | 42 ++++++++++++++++++++++++++++++++++++++++++
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qapi/block-core.json | 42 ++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 84 insertions(+)
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diff --git a/blockdev.c b/blockdev.c
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index 721dc9a..9e435f4 100644
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--- a/blockdev.c
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+++ b/blockdev.c
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@@ -2924,6 +2924,48 @@ void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
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bdrv_clear_dirty_bitmap(bitmap, NULL);
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}
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+void qmp_x_block_dirty_bitmap_enable(const char *node, const char *name,
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+ Error **errp)
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+{
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+ BlockDriverState *bs;
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+ BdrvDirtyBitmap *bitmap;
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+
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+ bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
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+ if (!bitmap) {
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+ return;
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+ }
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+
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+ if (bdrv_dirty_bitmap_frozen(bitmap)) {
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+ error_setg(errp,
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+ "Bitmap '%s' is currently frozen and cannot be enabled",
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+ name);
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+ return;
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+ }
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+
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+ bdrv_enable_dirty_bitmap(bitmap);
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+}
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+
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+void qmp_x_block_dirty_bitmap_disable(const char *node, const char *name,
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+ Error **errp)
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+{
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+ BlockDriverState *bs;
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+ BdrvDirtyBitmap *bitmap;
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+
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+ bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
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+ if (!bitmap) {
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+ return;
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+ }
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+
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+ if (bdrv_dirty_bitmap_frozen(bitmap)) {
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+ error_setg(errp,
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+ "Bitmap '%s' is currently frozen and cannot be disabled",
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+ name);
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+ return;
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+ }
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+
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+ bdrv_disable_dirty_bitmap(bitmap);
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+}
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+
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BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
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const char *name,
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Error **errp)
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diff --git a/qapi/block-core.json b/qapi/block-core.json
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index b0f41f1..6f3fdf4 100644
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--- a/qapi/block-core.json
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+++ b/qapi/block-core.json
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@@ -1809,6 +1809,48 @@
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'data': 'BlockDirtyBitmap' }
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##
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+# @x-block-dirty-bitmap-enable:
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+#
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+# Enables a dirty bitmap so that it will begin tracking disk changes.
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+#
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+# Returns: nothing on success
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+# If @node is not a valid block device, DeviceNotFound
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+# If @name is not found, GenericError with an explanation
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+#
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+# Since: 3.0
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+#
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+# Example:
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+#
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+# -> { "execute": "x-block-dirty-bitmap-enable",
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+# "arguments": { "node": "drive0", "name": "bitmap0" } }
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+# <- { "return": {} }
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+#
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+##
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+ { 'command': 'x-block-dirty-bitmap-enable',
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+ 'data': 'BlockDirtyBitmap' }
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+
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+##
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+# @x-block-dirty-bitmap-disable:
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+#
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+# Disables a dirty bitmap so that it will stop tracking disk changes.
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+#
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+# Returns: nothing on success
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+# If @node is not a valid block device, DeviceNotFound
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+# If @name is not found, GenericError with an explanation
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+#
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+# Since: 3.0
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+#
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+# Example:
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+#
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+# -> { "execute": "x-block-dirty-bitmap-disable",
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+# "arguments": { "node": "drive0", "name": "bitmap0" } }
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+# <- { "return": {} }
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+#
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+##
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+ { 'command': 'x-block-dirty-bitmap-disable',
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+ 'data': 'BlockDirtyBitmap' }
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+
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+##
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# @BlockDirtyBitmapSha256:
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#
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# SHA256 hash of dirty bitmap data
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--
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1.8.3.1
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