aboutsummaryrefslogtreecommitdiff
path: root/monitor.c
diff options
context:
space:
mode:
authorLuiz Capitulino <lcapitulino@redhat.com>2011-09-26 17:43:50 -0300
committerKevin Wolf <kwolf@redhat.com>2011-10-11 09:41:47 +0200
commit28a7282a5d5a15527e66d3a93c93c4ccc292f694 (patch)
tree423bbb87fff9eb708c120e8b791cd69d0c78278d /monitor.c
parent449c184ed23c6238da7fcc8b965c8fcc865d72a9 (diff)
block: Keep track of devices' I/O status
This commit adds support to the BlockDriverState type to keep track of devices' I/O status. There are three possible status: BDRV_IOS_OK (no error), BDRV_IOS_ENOSPC (no space error) and BDRV_IOS_FAILED (any other error). The distinction between no space and other errors is important because a management application may want to watch for no space in order to extend the space assigned to the VM and put it to run again. Qemu devices supporting the I/O status feature have to enable it explicitly by calling bdrv_iostatus_enable() _and_ have to be configured to stop the VM on errors (ie. werror=stop|enospc or rerror=stop). In case of multiple errors being triggered in sequence only the first one is stored. The I/O status is always reset to BDRV_IOS_OK when the 'cont' command is issued. Next commits will add support to some devices and extend the query-block/info block commands to return the I/O status information. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'monitor.c')
-rw-r--r--monitor.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/monitor.c b/monitor.c
index 31b212aa6b..1a2895633e 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1221,6 +1221,11 @@ struct bdrv_iterate_context {
int err;
};
+static void iostatus_bdrv_it(void *opaque, BlockDriverState *bs)
+{
+ bdrv_iostatus_reset(bs);
+}
+
/**
* do_cont(): Resume emulation.
*/
@@ -1237,6 +1242,7 @@ static int do_cont(Monitor *mon, const QDict *qdict, QObject **ret_data)
return -1;
}
+ bdrv_iterate(iostatus_bdrv_it, NULL);
bdrv_iterate(encrypted_bdrv_it, &context);
/* only resume the vm if all keys are set and valid */
if (!context.err) {