[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-block] [PATCH 24/42] job: Add job_event_*()
From: |
Kevin Wolf |
Subject: |
[Qemu-block] [PATCH 24/42] job: Add job_event_*() |
Date: |
Wed, 9 May 2018 18:26:19 +0200 |
Go through the Job layer in order to send QMP events. For the moment,
these functions only call a notifier in the BlockJob layer that sends
the existing commands.
This uses notifiers rather than JobDriver callbacks because internal
users of jobs won't receive QMP events, but might still be interested
in getting notified for the events.
Signed-off-by: Kevin Wolf <address@hidden>
---
include/block/blockjob.h | 9 +++++++++
include/qemu/job.h | 18 ++++++++++++++++++
blockjob.c | 42 ++++++++++++++++++++++++++++--------------
job.c | 19 +++++++++++++++++++
4 files changed, 74 insertions(+), 14 deletions(-)
diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index a74d5d02fd..b5bcb52219 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -82,6 +82,15 @@ typedef struct BlockJob {
/** Block other operations when block job is running */
Error *blocker;
+ /** Called when a cancelled job is finalised. */
+ Notifier finalize_cancelled_notifier;
+
+ /** Called when a successfully completed job is finalised. */
+ Notifier finalize_completed_notifier;
+
+ /** Called when the job transitions to PENDING */
+ Notifier pending_notifier;
+
/** BlockDriverStates that are involved in this block job */
GSList *nodes;
diff --git a/include/qemu/job.h b/include/qemu/job.h
index 9ad93ee862..1b4397f9a1 100644
--- a/include/qemu/job.h
+++ b/include/qemu/job.h
@@ -105,6 +105,15 @@ typedef struct Job {
/** True if this job should automatically dismiss itself */
bool auto_dismiss;
+ /** Notifiers called when a cancelled job is finalised */
+ NotifierList on_finalize_cancelled;
+
+ /** Notifiers called when a successfully completed job is finalised */
+ NotifierList on_finalize_completed;
+
+ /** Notifiers called when the job transitions to PENDING */
+ NotifierList on_pending;
+
/** Element of the list of jobs */
QLIST_ENTRY(Job) job_list;
} Job;
@@ -182,6 +191,15 @@ void job_ref(Job *job);
*/
void job_unref(Job *job);
+/** To be called when a cancelled job is finalised. */
+void job_event_cancelled(Job *job);
+
+/** To be called when a successfully completed job is finalised. */
+void job_event_completed(Job *job);
+
+/** To be called when the job transitions to PENDING */
+void job_event_pending(Job *job);
+
/**
* Conditionally enter the job coroutine if the job is ready to run, not
* already busy and fn() returns true. fn() is called while under the job_lock
diff --git a/blockjob.c b/blockjob.c
index de9a789e29..35376a60f0 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -36,10 +36,6 @@
#include "qemu/coroutine.h"
#include "qemu/timer.h"
-static void block_job_event_cancelled(BlockJob *job);
-static void block_job_event_completed(BlockJob *job, const char *msg);
-static void block_job_event_pending(BlockJob *job);
-
/* Transactional group of block jobs */
struct BlockJobTxn {
@@ -353,13 +349,9 @@ static int block_job_finalize_single(BlockJob *job)
/* Emit events only if we actually started */
if (job_started(&job->job)) {
if (job_is_cancelled(&job->job)) {
- block_job_event_cancelled(job);
+ job_event_cancelled(&job->job);
} else {
- const char *msg = NULL;
- if (job->ret < 0) {
- msg = strerror(-job->ret);
- }
- block_job_event_completed(job, msg);
+ job_event_completed(&job->job);
}
}
@@ -505,7 +497,7 @@ static int block_job_transition_to_pending(BlockJob *job)
{
job_state_transition(&job->job, JOB_STATUS_PENDING);
if (!job->job.auto_finalize) {
- block_job_event_pending(job);
+ job_event_pending(&job->job);
}
return 0;
}
@@ -713,8 +705,10 @@ static void block_job_iostatus_set_err(BlockJob *job, int
error)
}
}
-static void block_job_event_cancelled(BlockJob *job)
+static void block_job_event_cancelled(Notifier *n, void *opaque)
{
+ BlockJob *job = opaque;
+
if (block_job_is_internal(job)) {
return;
}
@@ -727,12 +721,19 @@ static void block_job_event_cancelled(BlockJob *job)
&error_abort);
}
-static void block_job_event_completed(BlockJob *job, const char *msg)
+static void block_job_event_completed(Notifier *n, void *opaque)
{
+ BlockJob *job = opaque;
+ const char *msg = NULL;
+
if (block_job_is_internal(job)) {
return;
}
+ if (job->ret < 0) {
+ msg = strerror(-job->ret);
+ }
+
qapi_event_send_block_job_completed(job_type(&job->job),
job->job.id,
job->len,
@@ -743,8 +744,10 @@ static void block_job_event_completed(BlockJob *job, const
char *msg)
&error_abort);
}
-static void block_job_event_pending(BlockJob *job)
+static void block_job_event_pending(Notifier *n, void *opaque)
{
+ BlockJob *job = opaque;
+
if (block_job_is_internal(job)) {
return;
}
@@ -800,6 +803,17 @@ void *block_job_create(const char *job_id, const
BlockJobDriver *driver,
job->cb = cb;
job->opaque = opaque;
+ job->finalize_cancelled_notifier.notify = block_job_event_cancelled;
+ job->finalize_completed_notifier.notify = block_job_event_completed;
+ job->pending_notifier.notify = block_job_event_pending;
+
+ 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);
+
error_setg(&job->blocker, "block device is in use by block job: %s",
job_type_str(&job->job));
block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort);
diff --git a/job.c b/job.c
index bcd335280a..8a27d4f760 100644
--- a/job.c
+++ b/job.c
@@ -215,6 +215,10 @@ void *job_create(const char *job_id, const JobDriver
*driver, AioContext *ctx,
job->auto_finalize = !(flags & JOB_MANUAL_FINALIZE);
job->auto_dismiss = !(flags & JOB_MANUAL_DISMISS);
+ notifier_list_init(&job->on_finalize_cancelled);
+ notifier_list_init(&job->on_finalize_completed);
+ notifier_list_init(&job->on_pending);
+
job_state_transition(job, JOB_STATUS_CREATED);
aio_timer_init(qemu_get_aio_context(), &job->sleep_timer,
QEMU_CLOCK_REALTIME, SCALE_NS,
@@ -247,6 +251,21 @@ void job_unref(Job *job)
}
}
+void job_event_cancelled(Job *job)
+{
+ notifier_list_notify(&job->on_finalize_cancelled, job);
+}
+
+void job_event_completed(Job *job)
+{
+ notifier_list_notify(&job->on_finalize_completed, job);
+}
+
+void job_event_pending(Job *job)
+{
+ notifier_list_notify(&job->on_pending, job);
+}
+
void job_enter_cond(Job *job, bool(*fn)(Job *job))
{
if (!job_started(job)) {
--
2.13.6
- Re: [Qemu-block] [Qemu-devel] [PATCH 18/42] job: Move coroutine and related code to Job, (continued)
- [Qemu-block] [PATCH 21/42] job: Replace BlockJob.completed with job_is_completed(), Kevin Wolf, 2018/05/09
- [Qemu-block] [PATCH 23/42] blockjob: Split block_job_event_pending(), Kevin Wolf, 2018/05/09
- [Qemu-block] [PATCH 19/42] job: Add job_sleep_ns(), Kevin Wolf, 2018/05/09
- [Qemu-block] [PATCH 24/42] job: Add job_event_*(),
Kevin Wolf <=
- [Qemu-block] [PATCH 22/42] job: Move BlockJobCreateFlags to Job, Kevin Wolf, 2018/05/09
- [Qemu-block] [PATCH 25/42] job: Move single job finalisation to Job, Kevin Wolf, 2018/05/09
- [Qemu-block] [PATCH 27/42] job: Add job_drain(), Kevin Wolf, 2018/05/09
- [Qemu-block] [PATCH 26/42] job: Convert block_job_cancel_async() to Job, Kevin Wolf, 2018/05/09