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[Qemu-devel] [PATCH v6 10/12] blockdev: add Abort transaction


From: Stefan Hajnoczi
Subject: [Qemu-devel] [PATCH v6 10/12] blockdev: add Abort transaction
Date: Mon, 24 Jun 2013 17:13:18 +0200

The Abort action can be used to test QMP 'transaction' failure.  Add it
as the last action to exercise the .abort() and .cleanup() code paths
for all previous actions.

Reviewed-by: Kevin Wolf <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 blockdev.c       | 15 +++++++++++++++
 qapi-schema.json | 13 ++++++++++++-
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/blockdev.c b/blockdev.c
index 8caeac4..edca843 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -963,6 +963,16 @@ static void drive_backup_abort(BlkTransactionState *common)
     }
 }
 
+static void abort_prepare(BlkTransactionState *common, Error **errp)
+{
+    error_setg(errp, "Transaction aborted using Abort action");
+}
+
+static void abort_commit(BlkTransactionState *common)
+{
+    assert(false); /* this action never succeeds */
+}
+
 static const BdrvActionOps actions[] = {
     [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
         .instance_size = sizeof(ExternalSnapshotState),
@@ -975,6 +985,11 @@ static const BdrvActionOps actions[] = {
         .prepare = drive_backup_prepare,
         .abort = drive_backup_abort,
     },
+    [TRANSACTION_ACTION_KIND_ABORT] = {
+        .instance_size = sizeof(BlkTransactionState),
+        .prepare = abort_prepare,
+        .commit = abort_commit,
+    },
 };
 
 /*
diff --git a/qapi-schema.json b/qapi-schema.json
index f3f6ff6..d6479e1 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1652,6 +1652,16 @@
             '*on-target-error': 'BlockdevOnError' } }
 
 ##
+# @Abort
+#
+# This action can be used to test transaction failure.
+#
+# Since: 1.6
+###
+{ 'type': 'Abort',
+  'data': { } }
+
+##
 # @TransactionAction
 #
 # A discriminated record of operations that can be performed with
@@ -1660,7 +1670,8 @@
 { 'union': 'TransactionAction',
   'data': {
        'blockdev-snapshot-sync': 'BlockdevSnapshot',
-       'drive-backup': 'DriveBackup'
+       'drive-backup': 'DriveBackup',
+       'abort': 'Abort'
    } }
 
 ##
-- 
1.8.1.4




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