job: Add Job.aio_context

When block jobs need an AioContext, they just take it from their main
block node. Generic jobs don't have a main block node, so we need to
assign them an AioContext explicitly.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
diff --git a/job.c b/job.c
index 1abca6a..01074d0 100644
--- a/job.c
+++ b/job.c
@@ -121,7 +121,8 @@
     return NULL;
 }
 
-void *job_create(const char *job_id, const JobDriver *driver, Error **errp)
+void *job_create(const char *job_id, const JobDriver *driver, AioContext *ctx,
+                 Error **errp)
 {
     Job *job;
 
@@ -140,6 +141,7 @@
     job->driver        = driver;
     job->id            = g_strdup(job_id);
     job->refcnt        = 1;
+    job->aio_context   = ctx;
 
     job_state_transition(job, JOB_STATUS_CREATED);