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58305efc05
qemu-kvm/0022-jobs-canonize-Error-object.patch
Danilo C. L. de Paula 58305efc05 Initial 3.0.0 rebase
2018-10-14 14:48:54 -03:00

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From 9dff1ec5bdde5e8bd8745d2e0697cc6e28c87214 Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Wed, 29 Aug 2018 21:57:27 -0400
Subject: jobs: canonize Error object
RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20180925223431.24791-3-jsnow@redhat.com>
Patchwork-id: 82262
O-Subject: [RHEL8/rhel qemu-kvm PATCH 02/25] jobs: canonize Error object
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>
Jobs presently use both an Error object in the case of the create job,
and char strings in the case of generic errors elsewhere.
Unify the two paths as just j->err, and remove the extra argument from
job_completed. The integer error code for job_completed is kept for now,
to be removed shortly in a separate patch.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20180830015734.19765-3-jsnow@redhat.com
[mreitz: Dropped a superfluous g_strdup()]
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit 3d1f8b07a4c241f81949eff507d9f3a8fd73b87b)
Signed-off-by: John Snow <jsnow@redhat.com>
---
block/backup.c | 2 +-
block/commit.c | 2 +-
block/create.c | 5 ++---
block/mirror.c | 2 +-
block/stream.c | 2 +-
include/qemu/job.h | 14 ++++++++------
job-qmp.c | 5 +++--
job.c | 18 ++++++------------
tests/test-bdrv-drain.c | 2 +-
tests/test-blockjob-txn.c | 2 +-
tests/test-blockjob.c | 2 +-
11 files changed, 26 insertions(+), 30 deletions(-)
diff --git a/block/backup.c b/block/backup.c
index 5d47781..1e965d5 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -388,7 +388,7 @@ static void backup_complete(Job *job, void *opaque)
{
BackupCompleteData *data = opaque;
- job_completed(job, data->ret, NULL);
+ job_completed(job, data->ret);
g_free(data);
}
diff --git a/block/commit.c b/block/commit.c
index 905a1c5..af7579d 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -117,7 +117,7 @@ static void commit_complete(Job *job, void *opaque)
* bdrv_set_backing_hd() to fail. */
block_job_remove_all_bdrv(bjob);
- job_completed(job, ret, NULL);
+ job_completed(job, ret);
g_free(data);
/* If bdrv_drop_intermediate() didn't already do that, remove the commit
diff --git a/block/create.c b/block/create.c
index 04733c3..26a385c 100644
--- a/block/create.c
+++ b/block/create.c
@@ -35,14 +35,13 @@ typedef struct BlockdevCreateJob {
BlockDriver *drv;
BlockdevCreateOptions *opts;
int ret;
- Error *err;
} BlockdevCreateJob;
static void blockdev_create_complete(Job *job, void *opaque)
{
BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common);
- job_completed(job, s->ret, s->err);
+ job_completed(job, s->ret);
}
static int coroutine_fn blockdev_create_run(Job *job, Error **errp)
@@ -50,7 +49,7 @@ static int coroutine_fn blockdev_create_run(Job *job, Error **errp)
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);
+ s->ret = s->drv->bdrv_co_create(s->opts, errp);
job_progress_update(&s->common, 1);
qapi_free_BlockdevCreateOptions(s->opts);
diff --git a/block/mirror.c b/block/mirror.c
index b3363e9..6637f2b 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -710,7 +710,7 @@ static void mirror_exit(Job *job, void *opaque)
blk_insert_bs(bjob->blk, mirror_top_bs, &error_abort);
bs_opaque->job = NULL;
- job_completed(job, data->ret, NULL);
+ job_completed(job, data->ret);
g_free(data);
bdrv_drained_end(src);
diff --git a/block/stream.c b/block/stream.c
index b4b987d..26a7753 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -93,7 +93,7 @@ out:
}
g_free(s->backing_file_str);
- job_completed(job, data->ret, NULL);
+ job_completed(job, data->ret);
g_free(data);
}
diff --git a/include/qemu/job.h b/include/qemu/job.h
index 9cf463d..e0e9987 100644
--- a/include/qemu/job.h
+++ b/include/qemu/job.h
@@ -124,12 +124,16 @@ typedef struct Job {
/** Estimated progress_current value at the completion of the job */
int64_t progress_total;
- /** Error string for a failed job (NULL if, and only if, job->ret == 0) */
- char *error;
-
/** ret code passed to job_completed. */
int ret;
+ /**
+ * Error object for a failed job.
+ * If job->ret is nonzero and an error object was not set, it will be set
+ * to strerror(-job->ret) during job_completed.
+ */
+ Error *err;
+
/** The completion function that will be called when the job completes. */
BlockCompletionFunc *cb;
@@ -484,15 +488,13 @@ void job_transition_to_ready(Job *job);
/**
* @job: The job being completed.
* @ret: The status code.
- * @error: The error message for a failing job (only with @ret < 0). If @ret is
- * negative, but NULL is given for @error, strerror() is used.
*
* Marks @job as completed. If @ret is non-zero, the job transaction it is part
* of is aborted. If @ret is zero, the job moves into the WAITING state. If it
* is the last job to complete in its transaction, all jobs in the transaction
* move from WAITING to PENDING.
*/
-void job_completed(Job *job, int ret, Error *error);
+void job_completed(Job *job, int ret);
/** Asynchronously complete the specified @job. */
void job_complete(Job *job, Error **errp);
diff --git a/job-qmp.c b/job-qmp.c
index 410775d..a969b2b 100644
--- a/job-qmp.c
+++ b/job-qmp.c
@@ -146,8 +146,9 @@ static JobInfo *job_query_single(Job *job, Error **errp)
.status = job->status,
.current_progress = job->progress_current,
.total_progress = job->progress_total,
- .has_error = !!job->error,
- .error = g_strdup(job->error),
+ .has_error = !!job->err,
+ .error = job->err ? \
+ g_strdup(error_get_pretty(job->err)) : NULL,
};
return info;
diff --git a/job.c b/job.c
index 898260b..276024a 100644
--- a/job.c
+++ b/job.c
@@ -369,7 +369,7 @@ void job_unref(Job *job)
QLIST_REMOVE(job, job_list);
- g_free(job->error);
+ error_free(job->err);
g_free(job->id);
g_free(job);
}
@@ -546,7 +546,7 @@ static void coroutine_fn job_co_entry(void *opaque)
assert(job && job->driver && job->driver->run);
job_pause_point(job);
- job->ret = job->driver->run(job, NULL);
+ job->ret = job->driver->run(job, &job->err);
}
@@ -666,8 +666,8 @@ static void job_update_rc(Job *job)
job->ret = -ECANCELED;
}
if (job->ret) {
- if (!job->error) {
- job->error = g_strdup(strerror(-job->ret));
+ if (!job->err) {
+ error_setg(&job->err, "%s", strerror(-job->ret));
}
job_state_transition(job, JOB_STATUS_ABORTING);
}
@@ -865,17 +865,11 @@ static void job_completed_txn_success(Job *job)
}
}
-void job_completed(Job *job, int ret, Error *error)
+void job_completed(Job *job, int ret)
{
assert(job && job->txn && !job_is_completed(job));
job->ret = ret;
- if (error) {
- assert(job->ret < 0);
- job->error = g_strdup(error_get_pretty(error));
- error_free(error);
- }
-
job_update_rc(job);
trace_job_completed(job, ret, job->ret);
if (job->ret) {
@@ -893,7 +887,7 @@ void job_cancel(Job *job, bool force)
}
job_cancel_async(job, force);
if (!job_started(job)) {
- job_completed(job, -ECANCELED, NULL);
+ job_completed(job, -ECANCELED);
} else if (job->deferred_to_main_loop) {
job_completed_txn_abort(job);
} else {
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index a753386..00604df 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -754,7 +754,7 @@ typedef struct TestBlockJob {
static void test_job_completed(Job *job, void *opaque)
{
- job_completed(job, 0, NULL);
+ job_completed(job, 0);
}
static int coroutine_fn test_job_run(Job *job, Error **errp)
diff --git a/tests/test-blockjob-txn.c b/tests/test-blockjob-txn.c
index 3194924..82cedee 100644
--- a/tests/test-blockjob-txn.c
+++ b/tests/test-blockjob-txn.c
@@ -34,7 +34,7 @@ static void test_block_job_complete(Job *job, void *opaque)
rc = -ECANCELED;
}
- job_completed(job, rc, NULL);
+ job_completed(job, rc);
bdrv_unref(bs);
}
diff --git a/tests/test-blockjob.c b/tests/test-blockjob.c
index b0462bf..408a226 100644
--- a/tests/test-blockjob.c
+++ b/tests/test-blockjob.c
@@ -167,7 +167,7 @@ static void cancel_job_completed(Job *job, void *opaque)
{
CancelJob *s = opaque;
s->completed = true;
- job_completed(job, 0, NULL);
+ job_completed(job, 0);
}
static void cancel_job_complete(Job *job, Error **errp)
--
1.8.3.1
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