From: Stefan Hajnoczi <address@hidden>
Provide a BlockJobTxn to actions executed in a qmp 'transaction'
command. This allows actions to make their block jobs either complete
as a group or fail/cancel together.
The next patch adds the first user.
Signed-off-by: Stefan Hajnoczi <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Reviewed-by: John Snow <address@hidden>
Signed-off-by: Fam Zheng <address@hidden>
---
blockdev.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/blockdev.c b/blockdev.c
index 2eb4f34..aba9d78 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1279,6 +1279,7 @@ typedef struct BlkActionOps {
struct BlkActionState {
TransactionAction *action;
const BlkActionOps *ops;
+ BlockJobTxn *block_job_txn;
QSIMPLEQ_ENTRY(BlkActionState) entry;
};
@@ -1883,12 +1884,15 @@ static const BlkActionOps actions[] = {
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
{
TransactionActionList *dev_entry = dev_list;
+ BlockJobTxn *block_job_txn;
BlkActionState *state, *next;
Error *local_err = NULL;
QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
QSIMPLEQ_INIT(&snap_bdrv_states);
+ block_job_txn = block_job_txn_new();
+
/* drain all i/o before any operations */
bdrv_drain_all();
@@ -1908,6 +1912,7 @@ void qmp_transaction(TransactionActionList *dev_list,
Error **errp)
state = g_malloc0(ops->instance_size);
state->ops = ops;
state->action = dev_info;
+ state->block_job_txn = block_job_txn;
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
state->ops->prepare(state, &local_err);