blkdebug: Add events and rules
Block drivers can trigger a blkdebug event whenever they reach a place where it
could be useful to inject an error for testing/debugging purposes.
Rules are read from a blkdebug config file and describe which action is taken
when an event is triggered. For now this is only injecting an error (with a few
options) or changing the state (which is an integer). Rules can be declared to
be active only in a specific state; this way later rules can distiguish on
which path we came to trigger their event.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block.c b/block.c
index 0881c93..9351aa3 100644
--- a/block.c
+++ b/block.c
@@ -1535,6 +1535,18 @@
return drv->bdrv_load_vmstate(bs, buf, pos, size);
}
+void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event)
+{
+ BlockDriver *drv = bs->drv;
+
+ if (!drv || !drv->bdrv_debug_event) {
+ return;
+ }
+
+ return drv->bdrv_debug_event(bs, event);
+
+}
+
/**************************************************************/
/* handling of snapshots */