[PATCH v4 4/7] block-backend: Enable retry action on errors

[Jiahui Cen]

Enable retry action when backend's retry timer is available. It would
trigger the timer to do device specific retry action.

Signed-off-by: Jiahui Cen <cenjiahui@huawei.com>
Signed-off-by: Ying Fang <fangying1@huawei.com>
---
 block/block-backend.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/block/block-backend.c b/block/block-backend.c
index bca7c581ee..9c6e50e568 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1803,6 +1803,9 @@ BlockErrorAction blk_get_error_action(BlockBackend *blk, 
bool is_read,
         return BLOCK_ERROR_ACTION_REPORT;
     case BLOCKDEV_ON_ERROR_IGNORE:
         return BLOCK_ERROR_ACTION_IGNORE;
+    case BLOCKDEV_ON_ERROR_RETRY:
+        return (blk->retry_timer) ?
+               BLOCK_ERROR_ACTION_RETRY : BLOCK_ERROR_ACTION_REPORT;
     case BLOCKDEV_ON_ERROR_AUTO:
     default:
         abort();
@@ -1850,6 +1853,10 @@ void blk_error_action(BlockBackend *blk, 
BlockErrorAction action,
         qemu_system_vmstop_request_prepare();
         send_qmp_error_event(blk, action, is_read, error);
         qemu_system_vmstop_request(RUN_STATE_IO_ERROR);
+    } else if (action == BLOCK_ERROR_ACTION_RETRY) {
+        timer_mod(blk->retry_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) +
+                                    blk->retry_interval);
+        send_qmp_error_event(blk, action, is_read, error);
     } else {
         send_qmp_error_event(blk, action, is_read, error);
     }
-- 
2.28.0