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qemu-kvm/SOURCES/kvm-job-Move-job_finish_sync-to-Job.patch

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From 1680cb0e35f1a465feb93ade536c630f62ef23be Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Tue, 26 Jun 2018 09:48:20 +0200
Subject: [PATCH 112/268] job: Move job_finish_sync() to Job
RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20180626094856.6924-38-kwolf@redhat.com>
Patchwork-id: 81076
O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH v2 37/73] job: Move job_finish_sync() to Job
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>
block_job_finish_sync() doesn't contain anything block job specific any
more, so it can be moved to Job.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit 6a74c075aca731e7e945201a4ae2336b8e328433)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
block/commit.c | 6 +++---
blockjob.c | 55 +++++++++---------------------------------------------
include/qemu/job.h | 9 +++++++++
job.c | 28 +++++++++++++++++++++++++++
4 files changed, 49 insertions(+), 49 deletions(-)
diff --git a/block/commit.c b/block/commit.c
index 02a8af9..40d97a3 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -112,9 +112,9 @@ static void commit_complete(Job *job, void *opaque)
blk_unref(s->top);
/* If there is more than one reference to the job (e.g. if called from
- * block_job_finish_sync()), block_job_completed() won't free it and
- * therefore the blockers on the intermediate nodes remain. This would
- * cause bdrv_set_backing_hd() to fail. */
+ * job_finish_sync()), block_job_completed() won't free it and therefore
+ * the blockers on the intermediate nodes remain. This would cause
+ * bdrv_set_backing_hd() to fail. */
block_job_remove_all_bdrv(bjob);
block_job_completed(&s->common, ret);
diff --git a/blockjob.c b/blockjob.c
index 0ca7672..1ed3e9c 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -307,40 +307,6 @@ static int block_job_txn_apply(BlockJobTxn *txn, int fn(BlockJob *), bool lock)
return rc;
}
-static int block_job_finish_sync(BlockJob *job,
- void (*finish)(BlockJob *, Error **errp),
- Error **errp)
-{
- Error *local_err = NULL;
- int ret;
-
- assert(blk_bs(job->blk)->job == job);
-
- job_ref(&job->job);
-
- if (finish) {
- finish(job, &local_err);
- }
- if (local_err) {
- error_propagate(errp, local_err);
- job_unref(&job->job);
- return -EBUSY;
- }
- /* job_drain calls job_enter, and it should be enough to induce progress
- * until the job completes or moves to the main thread.
- */
- while (!job->job.deferred_to_main_loop && !job_is_completed(&job->job)) {
- job_drain(&job->job);
- }
- while (!job_is_completed(&job->job)) {
- aio_poll(qemu_get_aio_context(), true);
- }
- ret = (job_is_cancelled(&job->job) && job->job.ret == 0)
- ? -ECANCELED : job->job.ret;
- job_unref(&job->job);
- return ret;
-}
-
static void block_job_completed_txn_abort(BlockJob *job)
{
AioContext *ctx;
@@ -375,7 +341,7 @@ static void block_job_completed_txn_abort(BlockJob *job)
ctx = blk_get_aio_context(other_job->blk);
if (!job_is_completed(&other_job->job)) {
assert(job_is_cancelled(&other_job->job));
- block_job_finish_sync(other_job, NULL, NULL);
+ job_finish_sync(&other_job->job, NULL, NULL);
}
job_finalize_single(&other_job->job);
aio_context_release(ctx);
@@ -528,16 +494,18 @@ void block_job_user_cancel(BlockJob *job, bool force, Error **errp)
}
/* A wrapper around block_job_cancel() taking an Error ** parameter so it may be
- * used with block_job_finish_sync() without the need for (rather nasty)
- * function pointer casts there. */
-static void block_job_cancel_err(BlockJob *job, Error **errp)
+ * used with job_finish_sync() without the need for (rather nasty) function
+ * pointer casts there. */
+static void block_job_cancel_err(Job *job, Error **errp)
{
- block_job_cancel(job, false);
+ BlockJob *bjob = container_of(job, BlockJob, job);
+ assert(is_block_job(job));
+ block_job_cancel(bjob, false);
}
int block_job_cancel_sync(BlockJob *job)
{
- return block_job_finish_sync(job, &block_job_cancel_err, NULL);
+ return job_finish_sync(&job->job, &block_job_cancel_err, NULL);
}
void block_job_cancel_sync_all(void)
@@ -553,14 +521,9 @@ void block_job_cancel_sync_all(void)
}
}
-static void block_job_complete(BlockJob *job, Error **errp)
-{
- job_complete(&job->job, errp);
-}
-
int block_job_complete_sync(BlockJob *job, Error **errp)
{
- return block_job_finish_sync(job, &block_job_complete, errp);
+ return job_finish_sync(&job->job, job_complete, errp);
}
void block_job_progress_update(BlockJob *job, uint64_t done)
diff --git a/include/qemu/job.h b/include/qemu/job.h
index 8f7f71a..17e2cec 100644
--- a/include/qemu/job.h
+++ b/include/qemu/job.h
@@ -389,6 +389,15 @@ typedef void JobDeferToMainLoopFn(Job *job, void *opaque);
*/
void job_defer_to_main_loop(Job *job, JobDeferToMainLoopFn *fn, void *opaque);
+/**
+ * Synchronously finishes the given @job. If @finish is given, it is called to
+ * trigger completion or cancellation of the job.
+ *
+ * Returns 0 if the job is successfully completed, -ECANCELED if the job was
+ * cancelled before completing, and -errno in other error cases.
+ */
+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);
diff --git a/job.c b/job.c
index 8ceac0b..aa74b4c 100644
--- a/job.c
+++ b/job.c
@@ -603,3 +603,31 @@ void job_defer_to_main_loop(Job *job, JobDeferToMainLoopFn *fn, void *opaque)
aio_bh_schedule_oneshot(qemu_get_aio_context(),
job_defer_to_main_loop_bh, data);
}
+
+int job_finish_sync(Job *job, void (*finish)(Job *, Error **errp), Error **errp)
+{
+ Error *local_err = NULL;
+ int ret;
+
+ job_ref(job);
+
+ if (finish) {
+ finish(job, &local_err);
+ }
+ if (local_err) {
+ error_propagate(errp, local_err);
+ job_unref(job);
+ return -EBUSY;
+ }
+ /* job_drain calls job_enter, and it should be enough to induce progress
+ * until the job completes or moves to the main thread. */
+ while (!job->deferred_to_main_loop && !job_is_completed(job)) {
+ job_drain(job);
+ }
+ while (!job_is_completed(job)) {
+ aio_poll(qemu_get_aio_context(), true);
+ }
+ ret = (job_is_cancelled(job) && job->ret == 0) ? -ECANCELED : job->ret;
+ job_unref(job);
+ return ret;
+}
--
1.8.3.1
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