From 053dd2951086a745e456f083d67e055f27029c3d Mon Sep 17 00:00:00 2001

From: Kevin Wolf <kwolf@redhat.com>

Date: Tue, 26 Jun 2018 09:48:25 +0200

Subject: [PATCH 56/89] job: Add job_yield()

RH-Author: Kevin Wolf <kwolf@redhat.com>

Message-id: <20180626094856.6924-43-kwolf@redhat.com>

Patchwork-id: 81120

O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH v2 42/73] job: Add job_yield()

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>

This moves block_job_yield() to the Job layer.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Reviewed-by: Max Reitz <mreitz@redhat.com>

(cherry picked from commit 198c49cc8d81e8eb0df3749d395599895c3a3a76)

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>

---

 block/backup.c               |  2 +-

 block/mirror.c               |  2 +-

 blockjob.c                   | 16 ----------------

 include/block/blockjob_int.h |  8 --------

 include/qemu/job.h           |  9 +++++++--

 job.c                        | 20 ++++++++++++++++++--

 tests/test-blockjob-txn.c    |  2 +-

 7 files changed, 28 insertions(+), 31 deletions(-)

diff --git a/block/backup.c b/block/backup.c

index b13f91d..6f4f3df 100644

--- a/block/backup.c

+++ b/block/backup.c

@@ -444,7 +444,7 @@ static void coroutine_fn backup_run(void *opaque)

         while (!job_is_cancelled(&job->common.job)) {

             /* Yield until the job is cancelled.  We just let our before_write

              * notify callback service CoW requests. */

-            block_job_yield(&job->common);

+            job_yield(&job->common.job);

         }

     } else if (job->sync_mode == MIRROR_SYNC_MODE_INCREMENTAL) {

         ret = backup_run_incremental(job);

diff --git a/block/mirror.c b/block/mirror.c

index c63cf7c..687f955 100644

--- a/block/mirror.c

+++ b/block/mirror.c

@@ -731,7 +731,7 @@ static void coroutine_fn mirror_run(void *opaque)

         block_job_event_ready(&s->common);

         s->synced = true;

         while (!job_is_cancelled(&s->common.job) && !s->should_complete) {

-            block_job_yield(&s->common);

+            job_yield(&s->common.job);

         }

         s->common.job.cancelled = false;

         goto immediate_exit;

diff --git a/blockjob.c b/blockjob.c

index 438baa1..f146fe0 100644

--- a/blockjob.c

+++ b/blockjob.c

@@ -431,22 +431,6 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,

     return job;

 }

-void block_job_yield(BlockJob *job)

-{

-    assert(job->job.busy);

-

-    /* Check cancellation *before* setting busy = false, too!  */

-    if (job_is_cancelled(&job->job)) {

-        return;

-    }

-

-    if (!job_should_pause(&job->job)) {

-        job_do_yield(&job->job, -1);

-    }

-

-    job_pause_point(&job->job);

-}

-

 void block_job_iostatus_reset(BlockJob *job)

 {

     if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {

diff --git a/include/block/blockjob_int.h b/include/block/blockjob_int.h

index 7df07b2..806ac64 100644

--- a/include/block/blockjob_int.h

+++ b/include/block/blockjob_int.h

@@ -108,14 +108,6 @@ void block_job_user_resume(Job *job);

 void block_job_drain(Job *job);

 /**

- * block_job_yield:

- * @job: The job that calls the function.

- *

- * Yield the block job coroutine.

- */

-void block_job_yield(BlockJob *job);

-

-/**

  * block_job_ratelimit_get_delay:

  *

  * Calculate and return delay for the next request in ns. See the documentation

diff --git a/include/qemu/job.h b/include/qemu/job.h

index bbe1b0c..94900ec 100644

--- a/include/qemu/job.h

+++ b/include/qemu/job.h

@@ -339,6 +339,13 @@ void coroutine_fn job_pause_point(Job *job);

 /**

  * @job: The job that calls the function.

+ *

+ * Yield the job coroutine.

+ */

+void job_yield(Job *job);

+

+/**

+ * @job: The job that calls the function.

  * @ns: How many nanoseconds to stop for.

  *

  * Put the job to sleep (assuming that it wasn't canceled) for @ns

@@ -508,8 +515,6 @@ int job_finish_sync(Job *job, void (*finish)(Job *, Error **errp), Error **errp)

 /* TODO To be removed from the public interface */

 void job_state_transition(Job *job, JobStatus s1);

-void coroutine_fn job_do_yield(Job *job, uint64_t ns);

-bool job_should_pause(Job *job);

 void job_do_dismiss(Job *job);

 #endif

diff --git a/job.c b/job.c

index 2e453f6..eede680 100644

--- a/job.c

+++ b/job.c

@@ -226,7 +226,7 @@ static bool job_started(Job *job)

     return job->co;

 }

-bool job_should_pause(Job *job)

+static bool job_should_pause(Job *job)

 {

     return job->pause_count > 0;

 }

@@ -396,7 +396,7 @@ void job_enter(Job *job)

  *

  * If @ns is (uint64_t) -1, no timer is scheduled and job_enter() must be

  * called explicitly. */

-void coroutine_fn job_do_yield(Job *job, uint64_t ns)

+static void coroutine_fn job_do_yield(Job *job, uint64_t ns)

 {

     job_lock();

     if (ns != -1) {

@@ -441,6 +441,22 @@ void coroutine_fn job_pause_point(Job *job)

     }

 }

+void job_yield(Job *job)

+{

+    assert(job->busy);

+

+    /* Check cancellation *before* setting busy = false, too!  */

+    if (job_is_cancelled(job)) {

+        return;

+    }

+

+    if (!job_should_pause(job)) {

+        job_do_yield(job, -1);

+    }

+

+    job_pause_point(job);

+}

+

 void coroutine_fn job_sleep_ns(Job *job, int64_t ns)

 {

     assert(job->busy);

diff --git a/tests/test-blockjob-txn.c b/tests/test-blockjob-txn.c

index 34ee179..fce8366 100644

--- a/tests/test-blockjob-txn.c

+++ b/tests/test-blockjob-txn.c

@@ -47,7 +47,7 @@ static void coroutine_fn test_block_job_run(void *opaque)

         if (s->use_timer) {

             job_sleep_ns(&job->job, 0);

         } else {

-            block_job_yield(job);

+            job_yield(&job->job);

         }

         if (job_is_cancelled(&job->job)) {

-- 

1.8.3.1