rpms
/
qemu-kvm
7
0
Fork 0
Code Issues Pull Requests Releases Activity
qemu-kvm/0029-jobs-change-start-call...

373 lines
13 KiB
Diff
Raw Blame History

From 2999207ffd4de9f139922b444edba07b051d4a67 Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Tue, 25 Sep 2018 22:34:07 +0100
Subject: jobs: change start callback to run callback
RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20180925223431.24791-2-jsnow@redhat.com>
Patchwork-id: 82261
O-Subject: [RHEL8/rhel qemu-kvm PATCH 01/25] jobs: change start callback to run callback
Bugzilla: 1632939
RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
Presently we codify the entry point for a job as the "start" callback,
but a more apt name would be "run" to clarify the idea that when this
function returns we consider the job to have "finished," except for
any cleanup which occurs in separate callbacks later.
As part of this clarification, change the signature to include an error
object and a return code. The error ptr is not yet used, and the return
code while captured, will be overwritten by actions in the job_completed
function.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20180830015734.19765-2-jsnow@redhat.com
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit f67432a2019caf05b57a146bf45c1024a5cb608e)
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
block/backup.c | 7 ++++---
block/commit.c | 7 ++++---
block/create.c | 8 +++++---
block/mirror.c | 10 ++++++----
block/stream.c | 7 ++++---
include/qemu/job.h | 2 +-
job.c | 6 +++---
tests/test-bdrv-drain.c | 7 ++++---
tests/test-blockjob-txn.c | 16 ++++++++--------
tests/test-blockjob.c | 7 ++++---
10 files changed, 43 insertions(+), 34 deletions(-)
diff --git a/block/backup.c b/block/backup.c
index 8630d32..5d47781 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -480,9 +480,9 @@ static void backup_incremental_init_copy_bitmap(BackupBlockJob *job)
bdrv_dirty_iter_free(dbi);
}
-static void coroutine_fn backup_run(void *opaque)
+static int coroutine_fn backup_run(Job *opaque_job, Error **errp)
{
- BackupBlockJob *job = opaque;
+ BackupBlockJob *job = container_of(opaque_job, BackupBlockJob, common.job);
BackupCompleteData *data;
BlockDriverState *bs = blk_bs(job->common.blk);
int64_t offset, nb_clusters;
@@ -587,6 +587,7 @@ static void coroutine_fn backup_run(void *opaque)
data = g_malloc(sizeof(*data));
data->ret = ret;
job_defer_to_main_loop(&job->common.job, backup_complete, data);
+ return ret;
}
static const BlockJobDriver backup_job_driver = {
@@ -596,7 +597,7 @@ static const BlockJobDriver backup_job_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = backup_run,
+ .run = backup_run,
.commit = backup_commit,
.abort = backup_abort,
.clean = backup_clean,
diff --git a/block/commit.c b/block/commit.c
index e1814d9..905a1c5 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -134,9 +134,9 @@ static void commit_complete(Job *job, void *opaque)
bdrv_unref(top);
}
-static void coroutine_fn commit_run(void *opaque)
+static int coroutine_fn commit_run(Job *job, Error **errp)
{
- CommitBlockJob *s = opaque;
+ CommitBlockJob *s = container_of(job, CommitBlockJob, common.job);
CommitCompleteData *data;
int64_t offset;
uint64_t delay_ns = 0;
@@ -213,6 +213,7 @@ out:
data = g_malloc(sizeof(*data));
data->ret = ret;
job_defer_to_main_loop(&s->common.job, commit_complete, data);
+ return ret;
}
static const BlockJobDriver commit_job_driver = {
@@ -222,7 +223,7 @@ static const BlockJobDriver commit_job_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = commit_run,
+ .run = commit_run,
},
};
diff --git a/block/create.c b/block/create.c
index 915cd41..04733c3 100644
--- a/block/create.c
+++ b/block/create.c
@@ -45,9 +45,9 @@ static void blockdev_create_complete(Job *job, void *opaque)
job_completed(job, s->ret, s->err);
}
-static void coroutine_fn blockdev_create_run(void *opaque)
+static int coroutine_fn blockdev_create_run(Job *job, Error **errp)
{
- BlockdevCreateJob *s = opaque;
+ BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common);
job_progress_set_remaining(&s->common, 1);
s->ret = s->drv->bdrv_co_create(s->opts, &s->err);
@@ -55,12 +55,14 @@ static void coroutine_fn blockdev_create_run(void *opaque)
qapi_free_BlockdevCreateOptions(s->opts);
job_defer_to_main_loop(&s->common, blockdev_create_complete, NULL);
+
+ return s->ret;
}
static const JobDriver blockdev_create_job_driver = {
.instance_size = sizeof(BlockdevCreateJob),
.job_type = JOB_TYPE_CREATE,
- .start = blockdev_create_run,
+ .run = blockdev_create_run,
};
void qmp_blockdev_create(const char *job_id, BlockdevCreateOptions *options,
diff --git a/block/mirror.c b/block/mirror.c
index b48c3f8..b3363e9 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -812,9 +812,9 @@ static int mirror_flush(MirrorBlockJob *s)
return ret;
}
-static void coroutine_fn mirror_run(void *opaque)
+static int coroutine_fn mirror_run(Job *job, Error **errp)
{
- MirrorBlockJob *s = opaque;
+ MirrorBlockJob *s = container_of(job, MirrorBlockJob, common.job);
MirrorExitData *data;
BlockDriverState *bs = s->mirror_top_bs->backing->bs;
BlockDriverState *target_bs = blk_bs(s->target);
@@ -1041,7 +1041,9 @@ immediate_exit:
if (need_drain) {
bdrv_drained_begin(bs);
}
+
job_defer_to_main_loop(&s->common.job, mirror_exit, data);
+ return ret;
}
static void mirror_complete(Job *job, Error **errp)
@@ -1138,7 +1140,7 @@ static const BlockJobDriver mirror_job_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = mirror_run,
+ .run = mirror_run,
.pause = mirror_pause,
.complete = mirror_complete,
},
@@ -1154,7 +1156,7 @@ static const BlockJobDriver commit_active_job_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = mirror_run,
+ .run = mirror_run,
.pause = mirror_pause,
.complete = mirror_complete,
},
diff --git a/block/stream.c b/block/stream.c
index 9264b68..b4b987d 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -97,9 +97,9 @@ out:
g_free(data);
}
-static void coroutine_fn stream_run(void *opaque)
+static int coroutine_fn stream_run(Job *job, Error **errp)
{
- StreamBlockJob *s = opaque;
+ StreamBlockJob *s = container_of(job, StreamBlockJob, common.job);
StreamCompleteData *data;
BlockBackend *blk = s->common.blk;
BlockDriverState *bs = blk_bs(blk);
@@ -206,6 +206,7 @@ out:
data = g_malloc(sizeof(*data));
data->ret = ret;
job_defer_to_main_loop(&s->common.job, stream_complete, data);
+ return ret;
}
static const BlockJobDriver stream_job_driver = {
@@ -213,7 +214,7 @@ static const BlockJobDriver stream_job_driver = {
.instance_size = sizeof(StreamBlockJob),
.job_type = JOB_TYPE_STREAM,
.free = block_job_free,
- .start = stream_run,
+ .run = stream_run,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
},
diff --git a/include/qemu/job.h b/include/qemu/job.h
index 18c9223..9cf463d 100644
--- a/include/qemu/job.h
+++ b/include/qemu/job.h
@@ -169,7 +169,7 @@ struct JobDriver {
JobType job_type;
/** Mandatory: Entrypoint for the Coroutine. */
- CoroutineEntry *start;
+ int coroutine_fn (*run)(Job *job, Error **errp);
/**
* If the callback is not NULL, it will be invoked when the job transitions
diff --git a/job.c b/job.c
index fa671b4..898260b 100644
--- a/job.c
+++ b/job.c
@@ -544,16 +544,16 @@ static void coroutine_fn job_co_entry(void *opaque)
{
Job *job = opaque;
- assert(job && job->driver && job->driver->start);
+ assert(job && job->driver && job->driver->run);
job_pause_point(job);
- job->driver->start(job);
+ job->ret = job->driver->run(job, NULL);
}
void job_start(Job *job)
{
assert(job && !job_started(job) && job->paused &&
- job->driver && job->driver->start);
+ job->driver && job->driver->run);
job->co = qemu_coroutine_create(job_co_entry, job);
job->pause_count--;
job->busy = true;
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index 17bb850..a753386 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -757,9 +757,9 @@ static void test_job_completed(Job *job, void *opaque)
job_completed(job, 0, NULL);
}
-static void coroutine_fn test_job_start(void *opaque)
+static int coroutine_fn test_job_run(Job *job, Error **errp)
{
- TestBlockJob *s = opaque;
+ TestBlockJob *s = container_of(job, TestBlockJob, common.job);
job_transition_to_ready(&s->common.job);
while (!s->should_complete) {
@@ -771,6 +771,7 @@ static void coroutine_fn test_job_start(void *opaque)
}
job_defer_to_main_loop(&s->common.job, test_job_completed, NULL);
+ return 0;
}
static void test_job_complete(Job *job, Error **errp)
@@ -785,7 +786,7 @@ BlockJobDriver test_job_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = test_job_start,
+ .run = test_job_run,
.complete = test_job_complete,
},
};
diff --git a/tests/test-blockjob-txn.c b/tests/test-blockjob-txn.c
index 58d9b87..3194924 100644
--- a/tests/test-blockjob-txn.c
+++ b/tests/test-blockjob-txn.c
@@ -38,25 +38,25 @@ static void test_block_job_complete(Job *job, void *opaque)
bdrv_unref(bs);
}
-static void coroutine_fn test_block_job_run(void *opaque)
+static int coroutine_fn test_block_job_run(Job *job, Error **errp)
{
- TestBlockJob *s = opaque;
- BlockJob *job = &s->common;
+ TestBlockJob *s = container_of(job, TestBlockJob, common.job);
while (s->iterations--) {
if (s->use_timer) {
- job_sleep_ns(&job->job, 0);
+ job_sleep_ns(job, 0);
} else {
- job_yield(&job->job);
+ job_yield(job);
}
- if (job_is_cancelled(&job->job)) {
+ if (job_is_cancelled(job)) {
break;
}
}
- job_defer_to_main_loop(&job->job, test_block_job_complete,
+ job_defer_to_main_loop(job, test_block_job_complete,
(void *)(intptr_t)s->rc);
+ return s->rc;
}
typedef struct {
@@ -80,7 +80,7 @@ static const BlockJobDriver test_block_job_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = test_block_job_run,
+ .run = test_block_job_run,
},
};
diff --git a/tests/test-blockjob.c b/tests/test-blockjob.c
index cb42f06..b0462bf 100644
--- a/tests/test-blockjob.c
+++ b/tests/test-blockjob.c
@@ -176,9 +176,9 @@ static void cancel_job_complete(Job *job, Error **errp)
s->should_complete = true;
}
-static void coroutine_fn cancel_job_start(void *opaque)
+static int coroutine_fn cancel_job_run(Job *job, Error **errp)
{
- CancelJob *s = opaque;
+ CancelJob *s = container_of(job, CancelJob, common.job);
while (!s->should_complete) {
if (job_is_cancelled(&s->common.job)) {
@@ -194,6 +194,7 @@ static void coroutine_fn cancel_job_start(void *opaque)
defer:
job_defer_to_main_loop(&s->common.job, cancel_job_completed, s);
+ return 0;
}
static const BlockJobDriver test_cancel_driver = {
@@ -202,7 +203,7 @@ static const BlockJobDriver test_cancel_driver = {
.free = block_job_free,
.user_resume = block_job_user_resume,
.drain = block_job_drain,
- .start = cancel_job_start,
+ .run = cancel_job_run,
.complete = cancel_job_complete,
},
};
--
1.8.3.1
Reference in New Issue View Git Blame Copy Permalink