#include "qemu/id.h"
#include "qemu/main-loop.h"
#include "trace-root.h"
+#include "qapi/qapi-events-job.h"
static QLIST_HEAD(, Job) jobs = QLIST_HEAD_INITIALIZER(jobs);
}
}
-static int job_txn_apply(JobTxn *txn, int fn(Job *), bool lock)
+static int job_txn_apply(JobTxn *txn, int fn(Job *))
{
- AioContext *ctx;
Job *job, *next;
int rc = 0;
QLIST_FOREACH_SAFE(job, &txn->jobs, txn_list, next) {
- if (lock) {
- ctx = job->aio_context;
- aio_context_acquire(ctx);
- }
rc = fn(job);
- if (lock) {
- aio_context_release(ctx);
- }
if (rc) {
break;
}
return rc;
}
+bool job_is_internal(Job *job)
+{
+ return (job->id == NULL);
+}
-/* TODO Make static once the whole state machine is in job.c */
-void job_state_transition(Job *job, JobStatus s1)
+static void job_state_transition(Job *job, JobStatus s1)
{
JobStatus s0 = job->status;
assert(s1 >= 0 && s1 <= JOB_STATUS__MAX);
JobStatus_str(s0), JobStatus_str(s1));
assert(JobSTT[s0][s1]);
job->status = s1;
+
+ if (!job_is_internal(job) && s1 != s0) {
+ qapi_event_send_job_status_change(job->id, job->status);
+ }
}
int job_apply_verb(Job *job, JobVerb verb, Error **errp)
return job->cancelled;
}
+bool job_is_ready(Job *job)
+{
+ switch (job->status) {
+ case JOB_STATUS_UNDEFINED:
+ case JOB_STATUS_CREATED:
+ case JOB_STATUS_RUNNING:
+ case JOB_STATUS_PAUSED:
+ case JOB_STATUS_WAITING:
+ case JOB_STATUS_PENDING:
+ case JOB_STATUS_ABORTING:
+ case JOB_STATUS_CONCLUDED:
+ case JOB_STATUS_NULL:
+ return false;
+ case JOB_STATUS_READY:
+ case JOB_STATUS_STANDBY:
+ return true;
+ default:
+ g_assert_not_reached();
+ }
+ return false;
+}
+
bool job_is_completed(Job *job)
{
switch (job->status) {
notifier_list_init(&job->on_finalize_cancelled);
notifier_list_init(&job->on_finalize_completed);
notifier_list_init(&job->on_pending);
+ notifier_list_init(&job->on_ready);
job_state_transition(job, JOB_STATUS_CREATED);
aio_timer_init(qemu_get_aio_context(), &job->sleep_timer,
QLIST_REMOVE(job, job_list);
+ error_free(job->err);
g_free(job->id);
g_free(job);
}
}
+void job_progress_update(Job *job, uint64_t done)
+{
+ job->progress_current += done;
+}
+
+void job_progress_set_remaining(Job *job, uint64_t remaining)
+{
+ job->progress_total = job->progress_current + remaining;
+}
+
+void job_progress_increase_remaining(Job *job, uint64_t delta)
+{
+ job->progress_total += delta;
+}
+
void job_event_cancelled(Job *job)
{
notifier_list_notify(&job->on_finalize_cancelled, job);
notifier_list_notify(&job->on_pending, job);
}
+static void job_event_ready(Job *job)
+{
+ notifier_list_notify(&job->on_ready, job);
+}
+
void job_enter_cond(Job *job, bool(*fn)(Job *job))
{
if (!job_started(job)) {
}
}
-
-/**
- * All jobs must allow a pause point before entering their job proper. This
- * ensures that jobs can be paused prior to being started, then resumed later.
- */
-static void coroutine_fn job_co_entry(void *opaque)
-{
- Job *job = opaque;
-
- assert(job && job->driver && job->driver->start);
- job_pause_point(job);
- job->driver->start(job);
-}
-
-
-void job_start(Job *job)
-{
- assert(job && !job_started(job) && job->paused &&
- job->driver && job->driver->start);
- job->co = qemu_coroutine_create(job_co_entry, job);
- job->pause_count--;
- job->busy = true;
- job->paused = false;
- job_state_transition(job, JOB_STATUS_RUNNING);
- aio_co_enter(job->aio_context, job->co);
-}
-
/* Assumes the block_job_mutex is held */
static bool job_timer_not_pending(Job *job)
{
job_resume(job);
}
-void job_do_dismiss(Job *job)
+static void job_do_dismiss(Job *job)
{
assert(job);
job->busy = false;
job_unref(job);
}
+void job_dismiss(Job **jobptr, Error **errp)
+{
+ Job *job = *jobptr;
+ /* similarly to _complete, this is QMP-interface only. */
+ assert(job->id);
+ if (job_apply_verb(job, JOB_VERB_DISMISS, errp)) {
+ return;
+ }
+
+ job_do_dismiss(job);
+ *jobptr = NULL;
+}
+
void job_early_fail(Job *job)
{
assert(job->status == JOB_STATUS_CREATED);
job->ret = -ECANCELED;
}
if (job->ret) {
+ if (!job->err) {
+ error_setg(&job->err, "%s", strerror(-job->ret));
+ }
job_state_transition(job, JOB_STATUS_ABORTING);
}
}
{
if (job->user_paused) {
/* Do not call job_enter here, the caller will handle it. */
- job->user_paused = false;
if (job->driver->user_resume) {
job->driver->user_resume(job);
}
+ job->user_paused = false;
assert(job->pause_count > 0);
job->pause_count--;
}
{
if (job->ret == 0 && job->driver->prepare) {
job->ret = job->driver->prepare(job);
+ job_update_rc(job);
}
return job->ret;
}
assert(job && job->txn);
/* prepare the transaction to complete */
- rc = job_txn_apply(job->txn, job_prepare, true);
+ rc = job_txn_apply(job->txn, job_prepare);
if (rc) {
job_completed_txn_abort(job);
} else {
- job_txn_apply(job->txn, job_finalize_single, true);
+ job_txn_apply(job->txn, job_finalize_single);
}
}
return 0;
}
+void job_transition_to_ready(Job *job)
+{
+ job_state_transition(job, JOB_STATUS_READY);
+ job_event_ready(job);
+}
+
static void job_completed_txn_success(Job *job)
{
JobTxn *txn = job->txn;
assert(other_job->ret == 0);
}
- job_txn_apply(txn, job_transition_to_pending, false);
+ job_txn_apply(txn, job_transition_to_pending);
/* If no jobs need manual finalization, automatically do so */
- if (job_txn_apply(txn, job_needs_finalize, false) == 0) {
+ if (job_txn_apply(txn, job_needs_finalize) == 0) {
job_do_finalize(job);
}
}
-void job_completed(Job *job, int ret)
+static void job_completed(Job *job)
{
assert(job && job->txn && !job_is_completed(job));
- job->ret = ret;
+
job_update_rc(job);
- trace_job_completed(job, ret, job->ret);
+ trace_job_completed(job, job->ret);
if (job->ret) {
job_completed_txn_abort(job);
} else {
}
}
+/** Useful only as a type shim for aio_bh_schedule_oneshot. */
+static void job_exit(void *opaque)
+{
+ Job *job = (Job *)opaque;
+ AioContext *ctx = job->aio_context;
+
+ aio_context_acquire(ctx);
+ job_completed(job);
+ aio_context_release(ctx);
+}
+
+/**
+ * All jobs must allow a pause point before entering their job proper. This
+ * ensures that jobs can be paused prior to being started, then resumed later.
+ */
+static void coroutine_fn job_co_entry(void *opaque)
+{
+ Job *job = opaque;
+
+ assert(job && job->driver && job->driver->run);
+ job_pause_point(job);
+ job->ret = job->driver->run(job, &job->err);
+ job->deferred_to_main_loop = true;
+ aio_bh_schedule_oneshot(qemu_get_aio_context(), job_exit, job);
+}
+
+void job_start(Job *job)
+{
+ assert(job && !job_started(job) && job->paused &&
+ job->driver && job->driver->run);
+ job->co = qemu_coroutine_create(job_co_entry, job);
+ job->pause_count--;
+ job->busy = true;
+ job->paused = false;
+ job_state_transition(job, JOB_STATUS_RUNNING);
+ aio_co_enter(job->aio_context, job->co);
+}
+
void job_cancel(Job *job, bool force)
{
if (job->status == JOB_STATUS_CONCLUDED) {
}
job_cancel_async(job, force);
if (!job_started(job)) {
- job_completed(job, -ECANCELED);
+ job_completed(job);
} else if (job->deferred_to_main_loop) {
job_completed_txn_abort(job);
} else {
job->driver->complete(job, errp);
}
-
-typedef struct {
- Job *job;
- JobDeferToMainLoopFn *fn;
- void *opaque;
-} JobDeferToMainLoopData;
-
-static void job_defer_to_main_loop_bh(void *opaque)
-{
- JobDeferToMainLoopData *data = opaque;
- Job *job = data->job;
- AioContext *aio_context = job->aio_context;
-
- aio_context_acquire(aio_context);
- data->fn(data->job, data->opaque);
- aio_context_release(aio_context);
-
- g_free(data);
-}
-
-void job_defer_to_main_loop(Job *job, JobDeferToMainLoopFn *fn, void *opaque)
-{
- JobDeferToMainLoopData *data = g_malloc(sizeof(*data));
- data->job = job;
- data->fn = fn;
- data->opaque = opaque;
- job->deferred_to_main_loop = true;
-
- 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;
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