qemu-kvm/SOURCES/kvm-qapi-add-transaction-support-for-x-block-dirty-bitma.patch

108 lines
4.1 KiB
Diff

From 5acc09c438937522b0bc4ae5b9a1968ef11e049c Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Tue, 20 Nov 2018 18:18:15 +0000
Subject: [PATCH 21/35] qapi: add transaction support for
x-block-dirty-bitmap-merge
RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20181120181828.15132-12-jsnow@redhat.com>
Patchwork-id: 83066
O-Subject: [RHEL8/rhel qemu-kvm PATCH 11/24] qapi: add transaction support for x-block-dirty-bitmap-merge
Bugzilla: 1518989
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
New action is like clean action: do the whole thing in .prepare and
undo in .abort. This behavior for bitmap-changing actions is needed
because backup job actions use bitmap in .prepare.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
(cherry picked from commit 6fd2e40789ef7389b17c5fff93b0bf82d4352cb3)
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
blockdev.c | 35 +++++++++++++++++++++++++++++++++++
qapi/transaction.json | 2 ++
2 files changed, 37 insertions(+)
diff --git a/blockdev.c b/blockdev.c
index c4b9ddd..d2e7e5a 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2222,6 +2222,35 @@ static void block_dirty_bitmap_disable_abort(BlkActionState *common)
}
}
+static void block_dirty_bitmap_merge_prepare(BlkActionState *common,
+ Error **errp)
+{
+ BlockDirtyBitmapMerge *action;
+ BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
+ common, common);
+ BdrvDirtyBitmap *merge_source;
+
+ if (action_check_completion_mode(common, errp) < 0) {
+ return;
+ }
+
+ action = common->action->u.x_block_dirty_bitmap_merge.data;
+ state->bitmap = block_dirty_bitmap_lookup(action->node,
+ action->dst_name,
+ &state->bs,
+ errp);
+ if (!state->bitmap) {
+ return;
+ }
+
+ merge_source = bdrv_find_dirty_bitmap(state->bs, action->src_name);
+ if (!merge_source) {
+ return;
+ }
+
+ bdrv_merge_dirty_bitmap(state->bitmap, merge_source, &state->backup, errp);
+}
+
static void abort_prepare(BlkActionState *common, Error **errp)
{
error_setg(errp, "Transaction aborted using Abort action");
@@ -2293,6 +2322,12 @@ static const BlkActionOps actions[] = {
.prepare = block_dirty_bitmap_disable_prepare,
.abort = block_dirty_bitmap_disable_abort,
},
+ [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_MERGE] = {
+ .instance_size = sizeof(BlockDirtyBitmapState),
+ .prepare = block_dirty_bitmap_merge_prepare,
+ .commit = block_dirty_bitmap_free_backup,
+ .abort = block_dirty_bitmap_restore,
+ },
/* Where are transactions for MIRROR, COMMIT and STREAM?
* Although these blockjobs use transaction callbacks like the backup job,
* these jobs do not necessarily adhere to transaction semantics.
diff --git a/qapi/transaction.json b/qapi/transaction.json
index d7e4274..5875cdb 100644
--- a/qapi/transaction.json
+++ b/qapi/transaction.json
@@ -48,6 +48,7 @@
# - @block-dirty-bitmap-clear: since 2.5
# - @x-block-dirty-bitmap-enable: since 3.0
# - @x-block-dirty-bitmap-disable: since 3.0
+# - @x-block-dirty-bitmap-merge: since 3.1
# - @blockdev-backup: since 2.3
# - @blockdev-snapshot: since 2.5
# - @blockdev-snapshot-internal-sync: since 1.7
@@ -63,6 +64,7 @@
'block-dirty-bitmap-clear': 'BlockDirtyBitmap',
'x-block-dirty-bitmap-enable': 'BlockDirtyBitmap',
'x-block-dirty-bitmap-disable': 'BlockDirtyBitmap',
+ 'x-block-dirty-bitmap-merge': 'BlockDirtyBitmapMerge',
'blockdev-backup': 'BlockdevBackup',
'blockdev-snapshot': 'BlockdevSnapshot',
'blockdev-snapshot-internal-sync': 'BlockdevSnapshotInternal',
--
1.8.3.1