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bh=P+7p20HEzolwDsphLIxugdZDkY42xvjireYc+vAr/yM=; b=WfwqobtWZRT67IGOHnu/jqvFHAUcQD9oQeMwf2Uzf/bQ2WeC2hjEs8KrCzG2XTFZnDuZBx F4TIZMVLHU8Vh85X5W4TGUsR7ubiRRtZe8rnuUs1ymm0eZAbsciQUdCXDFkHnUVdoPy+sz ei1QEebY+PZU4/BXU7K/lN7qxt4Jugw= X-MC-Unique: ev_PM4FROoyGA0MLN3QXzA-1 From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Cc: Kevin Wolf , Hanna Reitz , Paolo Bonzini , John Snow , Vladimir Sementsov-Ogievskiy , Wen Congyang , Xie Changlong , Markus Armbruster , Stefan Hajnoczi , Fam Zheng , qemu-devel@nongnu.org, Emanuele Giuseppe Esposito Subject: [PATCH v9 11/21] jobs: group together API calls under the same job lock Date: Wed, 6 Jul 2022 16:15:23 -0400 Message-Id: <20220706201533.289775-12-eesposit@redhat.com> In-Reply-To: <20220706201533.289775-1-eesposit@redhat.com> References: <20220706201533.289775-1-eesposit@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1657143482340100001 Content-Type: text/plain; charset="utf-8" Now that the API offers also _locked() functions, take advantage of it and give also the caller control to take the lock and call _locked functions. This makes sense especially when we have for loops, because it makes no sense to have: for(job =3D job_next(); ...) where each job_next() takes the lock internally. Instead we want JOB_LOCK_GUARD(); for(job =3D job_next_locked(); ...) Note: at this stage, job_{lock/unlock} and job lock guard macros are *nop*. Signed-off-by: Emanuele Giuseppe Esposito --- block.c | 20 +++++++++++------- blockdev.c | 12 ++++++++--- blockjob.c | 52 +++++++++++++++++++++++++++++++--------------- job-qmp.c | 4 +++- job.c | 5 ++++- monitor/qmp-cmds.c | 7 +++++-- qemu-img.c | 41 +++++++++++++++++++++--------------- 7 files changed, 93 insertions(+), 48 deletions(-) diff --git a/block.c b/block.c index 2c00dddd80..d0db104d71 100644 --- a/block.c +++ b/block.c @@ -4978,9 +4978,12 @@ static void bdrv_close(BlockDriverState *bs) =20 void bdrv_close_all(void) { - assert(job_next(NULL) =3D=3D NULL); GLOBAL_STATE_CODE(); =20 + WITH_JOB_LOCK_GUARD() { + assert(job_next_locked(NULL) =3D=3D NULL); + } + /* Drop references from requests still in flight, such as canceled blo= ck * jobs whose AIO context has not been polled yet */ bdrv_drain_all(); @@ -6165,13 +6168,16 @@ XDbgBlockGraph *bdrv_get_xdbg_block_graph(Error **e= rrp) } } =20 - for (job =3D block_job_next(NULL); job; job =3D block_job_next(job)) { - GSList *el; + WITH_JOB_LOCK_GUARD() { + for (job =3D block_job_next_locked(NULL); job; + job =3D block_job_next_locked(job)) { + GSList *el; =20 - xdbg_graph_add_node(gr, job, X_DBG_BLOCK_GRAPH_NODE_TYPE_BLOCK_JOB, - job->job.id); - for (el =3D job->nodes; el; el =3D el->next) { - xdbg_graph_add_edge(gr, job, (BdrvChild *)el->data); + xdbg_graph_add_node(gr, job, X_DBG_BLOCK_GRAPH_NODE_TYPE_BLOCK= _JOB, + job->job.id); + for (el =3D job->nodes; el; el =3D el->next) { + xdbg_graph_add_edge(gr, job, (BdrvChild *)el->data); + } } } =20 diff --git a/blockdev.c b/blockdev.c index 71f793c4ab..5b79093155 100644 --- a/blockdev.c +++ b/blockdev.c @@ -150,12 +150,15 @@ void blockdev_mark_auto_del(BlockBackend *blk) return; } =20 - for (job =3D block_job_next(NULL); job; job =3D block_job_next(job)) { + JOB_LOCK_GUARD(); + + for (job =3D block_job_next_locked(NULL); job; + job =3D block_job_next_locked(job)) { if (block_job_has_bdrv(job, blk_bs(blk))) { AioContext *aio_context =3D job->job.aio_context; aio_context_acquire(aio_context); =20 - job_cancel(&job->job, false); + job_cancel_locked(&job->job, false); =20 aio_context_release(aio_context); } @@ -3745,7 +3748,10 @@ BlockJobInfoList *qmp_query_block_jobs(Error **errp) BlockJobInfoList *head =3D NULL, **tail =3D &head; BlockJob *job; =20 - for (job =3D block_job_next(NULL); job; job =3D block_job_next(job)) { + JOB_LOCK_GUARD(); + + for (job =3D block_job_next_locked(NULL); job; + job =3D block_job_next_locked(job)) { BlockJobInfo *value; AioContext *aio_context; =20 diff --git a/blockjob.c b/blockjob.c index 0d59aba439..bce05a9096 100644 --- a/blockjob.c +++ b/blockjob.c @@ -99,7 +99,9 @@ static char *child_job_get_parent_desc(BdrvChild *c) static void child_job_drained_begin(BdrvChild *c) { BlockJob *job =3D c->opaque; - job_pause(&job->job); + WITH_JOB_LOCK_GUARD() { + job_pause_locked(&job->job); + } } =20 static bool child_job_drained_poll(BdrvChild *c) @@ -111,8 +113,10 @@ static bool child_job_drained_poll(BdrvChild *c) /* An inactive or completed job doesn't have any pending requests. Jobs * with !job->busy are either already paused or have a pause point aft= er * being reentered, so no job driver code will run before they pause. = */ - if (!job->busy || job_is_completed(job)) { - return false; + WITH_JOB_LOCK_GUARD() { + if (!job->busy || job_is_completed_locked(job)) { + return false; + } } =20 /* Otherwise, assume that it isn't fully stopped yet, but allow the jo= b to @@ -127,7 +131,9 @@ static bool child_job_drained_poll(BdrvChild *c) static void child_job_drained_end(BdrvChild *c, int *drained_end_counter) { BlockJob *job =3D c->opaque; - job_resume(&job->job); + WITH_JOB_LOCK_GUARD() { + job_resume_locked(&job->job); + } } =20 static bool child_job_can_set_aio_ctx(BdrvChild *c, AioContext *ctx, @@ -475,13 +481,15 @@ void *block_job_create(const char *job_id, const Bloc= kJobDriver *driver, job->ready_notifier.notify =3D block_job_event_ready; job->idle_notifier.notify =3D block_job_on_idle; =20 - notifier_list_add(&job->job.on_finalize_cancelled, - &job->finalize_cancelled_notifier); - notifier_list_add(&job->job.on_finalize_completed, - &job->finalize_completed_notifier); - notifier_list_add(&job->job.on_pending, &job->pending_notifier); - notifier_list_add(&job->job.on_ready, &job->ready_notifier); - notifier_list_add(&job->job.on_idle, &job->idle_notifier); + WITH_JOB_LOCK_GUARD() { + notifier_list_add(&job->job.on_finalize_cancelled, + &job->finalize_cancelled_notifier); + notifier_list_add(&job->job.on_finalize_completed, + &job->finalize_completed_notifier); + notifier_list_add(&job->job.on_pending, &job->pending_notifier); + notifier_list_add(&job->job.on_ready, &job->ready_notifier); + notifier_list_add(&job->job.on_idle, &job->idle_notifier); + } =20 error_setg(&job->blocker, "block device is in use by block job: %s", job_type_str(&job->job)); @@ -493,7 +501,10 @@ void *block_job_create(const char *job_id, const Block= JobDriver *driver, =20 bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker); =20 - if (!block_job_set_speed(job, speed, errp)) { + WITH_JOB_LOCK_GUARD() { + ret =3D block_job_set_speed_locked(job, speed, errp); + } + if (!ret) { goto fail; } =20 @@ -524,7 +535,9 @@ void block_job_user_resume(Job *job) { BlockJob *bjob =3D container_of(job, BlockJob, job); GLOBAL_STATE_CODE(); - block_job_iostatus_reset(bjob); + WITH_JOB_LOCK_GUARD() { + block_job_iostatus_reset_locked(bjob); + } } =20 BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_= err, @@ -558,10 +571,15 @@ BlockErrorAction block_job_error_action(BlockJob *job= , BlockdevOnError on_err, action); } if (action =3D=3D BLOCK_ERROR_ACTION_STOP) { - if (!job->job.user_paused) { - job_pause(&job->job); - /* make the pause user visible, which will be resumed from QMP= . */ - job->job.user_paused =3D true; + WITH_JOB_LOCK_GUARD() { + if (!job->job.user_paused) { + job_pause_locked(&job->job); + /* + * make the pause user visible, which will be + * resumed from QMP. + */ + job->job.user_paused =3D true; + } } block_job_iostatus_set_err(job, error); } diff --git a/job-qmp.c b/job-qmp.c index ac11a6c23c..cfaf34ffb7 100644 --- a/job-qmp.c +++ b/job-qmp.c @@ -194,7 +194,9 @@ JobInfoList *qmp_query_jobs(Error **errp) JobInfoList *head =3D NULL, **tail =3D &head; Job *job; =20 - for (job =3D job_next(NULL); job; job =3D job_next(job)) { + JOB_LOCK_GUARD(); + + for (job =3D job_next_locked(NULL); job; job =3D job_next_locked(job))= { JobInfo *value; AioContext *aio_context; =20 diff --git a/job.c b/job.c index de3d368086..9c8792c9e8 100644 --- a/job.c +++ b/job.c @@ -1046,11 +1046,14 @@ static void job_completed_txn_abort_locked(Job *job) /* Called with job_mutex held, but releases it temporarily */ static int job_prepare_locked(Job *job) { + int ret; + GLOBAL_STATE_CODE(); if (job->ret =3D=3D 0 && job->driver->prepare) { job_unlock(); - job->ret =3D job->driver->prepare(job); + ret =3D job->driver->prepare(job); job_lock(); + job->ret =3D ret; job_update_rc_locked(job); } return job->ret; diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c index 1ebb89f46c..1897ed7a13 100644 --- a/monitor/qmp-cmds.c +++ b/monitor/qmp-cmds.c @@ -133,8 +133,11 @@ void qmp_cont(Error **errp) blk_iostatus_reset(blk); } =20 - for (job =3D block_job_next(NULL); job; job =3D block_job_next(job)) { - block_job_iostatus_reset(job); + WITH_JOB_LOCK_GUARD() { + for (job =3D block_job_next_locked(NULL); job; + job =3D block_job_next_locked(job)) { + block_job_iostatus_reset_locked(job); + } } =20 /* Continuing after completed migration. Images have been inactivated = to diff --git a/qemu-img.c b/qemu-img.c index 4cf4d2423d..289d88a156 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -912,25 +912,30 @@ static void run_block_job(BlockJob *job, Error **errp) int ret =3D 0; =20 aio_context_acquire(aio_context); - job_ref(&job->job); - do { - float progress =3D 0.0f; - aio_poll(aio_context, true); + WITH_JOB_LOCK_GUARD() { + job_ref_locked(&job->job); + do { + float progress =3D 0.0f; + job_unlock(); + aio_poll(aio_context, true); + + progress_get_snapshot(&job->job.progress, &progress_current, + &progress_total); + if (progress_total) { + progress =3D (float)progress_current / progress_total * 10= 0.f; + } + qemu_progress_print(progress, 0); + job_lock(); + } while (!job_is_ready_locked(&job->job) && + !job_is_completed_locked(&job->job)); =20 - progress_get_snapshot(&job->job.progress, &progress_current, - &progress_total); - if (progress_total) { - progress =3D (float)progress_current / progress_total * 100.f; + if (!job_is_completed_locked(&job->job)) { + ret =3D job_complete_sync_locked(&job->job, errp); + } else { + ret =3D job->job.ret; } - qemu_progress_print(progress, 0); - } while (!job_is_ready(&job->job) && !job_is_completed(&job->job)); - - if (!job_is_completed(&job->job)) { - ret =3D job_complete_sync(&job->job, errp); - } else { - ret =3D job->job.ret; + job_unref_locked(&job->job); } - job_unref(&job->job); aio_context_release(aio_context); =20 /* publish completion progress only when success */ @@ -1083,7 +1088,9 @@ static int img_commit(int argc, char **argv) bdrv_ref(bs); } =20 - job =3D block_job_get("commit"); + WITH_JOB_LOCK_GUARD() { + job =3D block_job_get_locked("commit"); + } assert(job); run_block_job(job, &local_err); if (local_err) { --=20 2.31.1