qemu-kvm/SOURCES/kvm-job-Add-Job.aio_context.patch

From 7d49650cc825e639180ba1d7580e15cf56fb21da Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Tue, 26 Jun 2018 09:48:07 +0200
Subject: [PATCH 099/268] job: Add Job.aio_context

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20180626094856.6924-25-kwolf@redhat.com>
Patchwork-id: 81075
O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH v2 24/73] job: Add Job.aio_context
Bugzilla: 1513543
RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Fam Zheng <famz@redhat.com>

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>
(cherry picked from commit 08be6fe26f6c76d900fc987f58d322b94bc4e248)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 blockjob.c         | 5 ++++-
 include/qemu/job.h | 7 ++++++-
 job.c              | 4 +++-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/blockjob.c b/blockjob.c
index f4f9956..0a0b1c4 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -216,6 +216,7 @@ static void block_job_attached_aio_context(AioContext *new_context,
 {
     BlockJob *job = opaque;
 
+    job->job.aio_context = new_context;
     if (job->driver->attached_aio_context) {
         job->driver->attached_aio_context(job, new_context);
     }
@@ -247,6 +248,7 @@ static void block_job_detach_aio_context(void *opaque)
         block_job_drain(job);
     }
 
+    job->job.aio_context = NULL;
     job_unref(&job->job);
 }
 
@@ -899,7 +901,8 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
         return NULL;
     }
 
-    job = job_create(job_id, &driver->job_driver, errp);
+    job = job_create(job_id, &driver->job_driver, blk_get_aio_context(blk),
+                     errp);
     if (job == NULL) {
         blk_unref(blk);
         return NULL;
diff --git a/include/qemu/job.h b/include/qemu/job.h
index 5dfbec5..01e083f 100644
--- a/include/qemu/job.h
+++ b/include/qemu/job.h
@@ -47,6 +47,9 @@ typedef struct Job {
     /** Current state; See @JobStatus for details. */
     JobStatus status;
 
+    /** AioContext to run the job coroutine in */
+    AioContext *aio_context;
+
     /**
      * Set to true if the job should cancel itself.  The flag must
      * always be tested just before toggling the busy flag from false
@@ -79,9 +82,11 @@ struct JobDriver {
  *
  * @job_id: The id of the newly-created job, or %NULL for internal jobs
  * @driver: The class object for the newly-created job.
+ * @ctx: The AioContext to run the job coroutine in.
  * @errp: Error object.
  */
-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);
 
 /**
  * Add a reference to Job refcnt, it will be decreased with job_unref, and then
diff --git a/job.c b/job.c
index 1abca6a..01074d0 100644
--- a/job.c
+++ b/job.c
@@ -121,7 +121,8 @@ Job *job_get(const char *id)
     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 @@ void *job_create(const char *job_id, const JobDriver *driver, Error **errp)
     job->driver        = driver;
     job->id            = g_strdup(job_id);
     job->refcnt        = 1;
+    job->aio_context   = ctx;
 
     job_state_transition(job, JOB_STATUS_CREATED);
 
-- 
1.8.3.1