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authorPaolo Bonzini <pbonzini@redhat.com>2012-09-28 17:22:58 +0200
committerKevin Wolf <kwolf@redhat.com>2012-09-28 19:40:56 +0200
commit32c81a4a6ecc3f50efc9c270a269e4d3d8a9fbd5 (patch)
tree69270e827b26d7735a605626e58fea479b16a219 /blockjob.c
parent3e1caa5f76a9104a0d574b0f28b3dafe986a8408 (diff)
downloadqemu-arm-32c81a4a6ecc3f50efc9c270a269e4d3d8a9fbd5.tar.gz
block: introduce block job error
The following behaviors are possible: 'report': The behavior is the same as in 1.1. An I/O error, respectively during a read or a write, will complete the job immediately with an error code. 'ignore': An I/O error, respectively during a read or a write, will be ignored. For streaming, the job will complete with an error and the backing file will be left in place. For mirroring, the sector will be marked again as dirty and re-examined later. 'stop': The job will be paused and the job iostatus will be set to failed or nospace, while the VM will keep running. This can only be specified if the block device has rerror=stop and werror=stop or enospc. 'enospc': Behaves as 'stop' for ENOSPC errors, 'report' for others. In all cases, even for 'report', the I/O error is reported as a QMP event BLOCK_JOB_ERROR, with the same arguments as BLOCK_IO_ERROR. It is possible that while stopping the VM a BLOCK_IO_ERROR event will be reported and will clobber the event from BLOCK_JOB_ERROR, or vice versa. This is not really avoidable since stopping the VM completes all pending I/O requests. In fact, it is already possible now that a series of BLOCK_IO_ERROR events are reported with rerror=stop, because vm_stop calls bdrv_drain_all and this can generate further errors. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockjob.c')
-rw-r--r--blockjob.c63
1 files changed, 56 insertions, 7 deletions
diff --git a/blockjob.c b/blockjob.c
index 8219f73979..f55f55a193 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -112,6 +112,7 @@ bool block_job_is_paused(BlockJob *job)
void block_job_resume(BlockJob *job)
{
job->paused = false;
+ block_job_iostatus_reset(job);
if (job->co && !job->busy) {
qemu_coroutine_enter(job->co, NULL);
}
@@ -128,6 +129,11 @@ bool block_job_is_cancelled(BlockJob *job)
return job->cancelled;
}
+void block_job_iostatus_reset(BlockJob *job)
+{
+ job->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
+}
+
struct BlockCancelData {
BlockJob *job;
BlockDriverCompletionFunc *cb;
@@ -189,12 +195,55 @@ void block_job_sleep_ns(BlockJob *job, QEMUClock *clock, int64_t ns)
BlockJobInfo *block_job_query(BlockJob *job)
{
BlockJobInfo *info = g_new0(BlockJobInfo, 1);
- info->type = g_strdup(job->job_type->job_type);
- info->device = g_strdup(bdrv_get_device_name(job->bs));
- info->len = job->len;
- info->busy = job->busy;
- info->paused = job->paused;
- info->offset = job->offset;
- info->speed = job->speed;
+ info->type = g_strdup(job->job_type->job_type);
+ info->device = g_strdup(bdrv_get_device_name(job->bs));
+ info->len = job->len;
+ info->busy = job->busy;
+ info->paused = job->paused;
+ info->offset = job->offset;
+ info->speed = job->speed;
+ info->io_status = job->iostatus;
return info;
}
+
+static void block_job_iostatus_set_err(BlockJob *job, int error)
+{
+ if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
+ job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE :
+ BLOCK_DEVICE_IO_STATUS_FAILED;
+ }
+}
+
+
+BlockErrorAction block_job_error_action(BlockJob *job, BlockDriverState *bs,
+ BlockdevOnError on_err,
+ int is_read, int error)
+{
+ BlockErrorAction action;
+
+ switch (on_err) {
+ case BLOCKDEV_ON_ERROR_ENOSPC:
+ action = (error == ENOSPC) ? BDRV_ACTION_STOP : BDRV_ACTION_REPORT;
+ break;
+ case BLOCKDEV_ON_ERROR_STOP:
+ action = BDRV_ACTION_STOP;
+ break;
+ case BLOCKDEV_ON_ERROR_REPORT:
+ action = BDRV_ACTION_REPORT;
+ break;
+ case BLOCKDEV_ON_ERROR_IGNORE:
+ action = BDRV_ACTION_IGNORE;
+ break;
+ default:
+ abort();
+ }
+ bdrv_emit_qmp_error_event(job->bs, QEVENT_BLOCK_JOB_ERROR, action, is_read);
+ if (action == BDRV_ACTION_STOP) {
+ block_job_pause(job);
+ block_job_iostatus_set_err(job, error);
+ if (bs != job->bs) {
+ bdrv_iostatus_set_err(bs, error);
+ }
+ }
+ return action;
+}