#include "block/block.h"
#include "block/blockjob_int.h"
#include "block/block_int.h"
+#include "block/trace.h"
#include "sysemu/block-backend.h"
+#include "qapi/error.h"
+#include "qapi/qapi-events-block-core.h"
#include "qapi/qmp/qerror.h"
-#include "qapi/qmp/qjson.h"
#include "qemu/coroutine.h"
-#include "qemu/id.h"
-#include "qmp-commands.h"
#include "qemu/timer.h"
-#include "qapi-event.h"
-static void block_job_event_cancelled(BlockJob *job);
-static void block_job_event_completed(BlockJob *job, const char *msg);
-
-/* Transactional group of block jobs */
-struct BlockJobTxn {
-
- /* Is this txn being cancelled? */
- bool aborting;
-
- /* List of jobs */
- QLIST_HEAD(, BlockJob) jobs;
-
- /* Reference count */
- int refcnt;
-};
-
-static QLIST_HEAD(, BlockJob) block_jobs = QLIST_HEAD_INITIALIZER(block_jobs);
+/*
+ * The block job API is composed of two categories of functions.
+ *
+ * The first includes functions used by the monitor. The monitor is
+ * peculiar in that it accesses the block job list with block_job_get, and
+ * therefore needs consistency across block_job_get and the actual operation
+ * (e.g. block_job_set_speed). The consistency is achieved with
+ * aio_context_acquire/release. These functions are declared in blockjob.h.
+ *
+ * The second includes functions used by the block job drivers and sometimes
+ * by the core block layer. These do not care about locking, because the
+ * whole coroutine runs under the AioContext lock, and are declared in
+ * blockjob_int.h.
+ */
-static char *child_job_get_parent_desc(BdrvChild *c)
+static bool is_block_job(Job *job)
{
- BlockJob *job = c->opaque;
- return g_strdup_printf("%s job '%s'",
- BlockJobType_lookup[job->driver->job_type],
- job->id);
+ return job_type(job) == JOB_TYPE_BACKUP ||
+ job_type(job) == JOB_TYPE_COMMIT ||
+ job_type(job) == JOB_TYPE_MIRROR ||
+ job_type(job) == JOB_TYPE_STREAM;
}
-static const BdrvChildRole child_job = {
- .get_parent_desc = child_job_get_parent_desc,
- .stay_at_node = true,
-};
-
-BlockJob *block_job_next(BlockJob *job)
+BlockJob *block_job_next(BlockJob *bjob)
{
- if (!job) {
- return QLIST_FIRST(&block_jobs);
- }
- return QLIST_NEXT(job, job_list);
+ Job *job = bjob ? &bjob->job : NULL;
+
+ do {
+ job = job_next(job);
+ } while (job && !is_block_job(job));
+
+ return job ? container_of(job, BlockJob, job) : NULL;
}
BlockJob *block_job_get(const char *id)
{
- BlockJob *job;
+ Job *job = job_get(id);
- QLIST_FOREACH(job, &block_jobs, job_list) {
- if (job->id && !strcmp(id, job->id)) {
- return job;
- }
+ if (job && is_block_job(job)) {
+ return container_of(job, BlockJob, job);
+ } else {
+ return NULL;
}
+}
+
+static void block_job_attached_aio_context(AioContext *new_context,
+ void *opaque);
+static void block_job_detach_aio_context(void *opaque);
- return NULL;
+void block_job_free(Job *job)
+{
+ BlockJob *bjob = container_of(job, BlockJob, job);
+ BlockDriverState *bs = blk_bs(bjob->blk);
+
+ bs->job = NULL;
+ block_job_remove_all_bdrv(bjob);
+ blk_remove_aio_context_notifier(bjob->blk,
+ block_job_attached_aio_context,
+ block_job_detach_aio_context, bjob);
+ blk_unref(bjob->blk);
+ error_free(bjob->blocker);
}
static void block_job_attached_aio_context(AioContext *new_context,
void *opaque)
{
BlockJob *job = opaque;
+ const JobDriver *drv = job->job.driver;
+ BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver);
- if (job->driver->attached_aio_context) {
- job->driver->attached_aio_context(job, new_context);
+ job->job.aio_context = new_context;
+ if (bjdrv->attached_aio_context) {
+ bjdrv->attached_aio_context(job, new_context);
}
- block_job_resume(job);
+ job_resume(&job->job);
}
-static void block_job_drain(BlockJob *job)
+void block_job_drain(Job *job)
{
- /* If job is !job->busy this kicks it into the next pause point. */
- block_job_enter(job);
+ BlockJob *bjob = container_of(job, BlockJob, job);
+ const JobDriver *drv = job->driver;
+ BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver);
- blk_drain(job->blk);
- if (job->driver->drain) {
- job->driver->drain(job);
+ blk_drain(bjob->blk);
+ if (bjdrv->drain) {
+ bjdrv->drain(bjob);
}
}
BlockJob *job = opaque;
/* In case the job terminates during aio_poll()... */
- block_job_ref(job);
+ job_ref(&job->job);
- block_job_pause(job);
+ job_pause(&job->job);
- while (!job->paused && !job->completed) {
- block_job_drain(job);
+ while (!job->job.paused && !job_is_completed(&job->job)) {
+ job_drain(&job->job);
}
- block_job_unref(job);
+ job->job.aio_context = NULL;
+ job_unref(&job->job);
}
+static char *child_job_get_parent_desc(BdrvChild *c)
+{
+ BlockJob *job = c->opaque;
+ return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id);
+}
+
+static void child_job_drained_begin(BdrvChild *c)
+{
+ BlockJob *job = c->opaque;
+ job_pause(&job->job);
+}
+
+static bool child_job_drained_poll(BdrvChild *c)
+{
+ BlockJob *bjob = c->opaque;
+ Job *job = &bjob->job;
+ const BlockJobDriver *drv = block_job_driver(bjob);
+
+ /* An inactive or completed job doesn't have any pending requests. Jobs
+ * with !job->busy are either already paused or have a pause point after
+ * being reentered, so no job driver code will run before they pause. */
+ if (!job->busy || job_is_completed(job)) {
+ return false;
+ }
+
+ /* Otherwise, assume that it isn't fully stopped yet, but allow the job to
+ * override this assumption. */
+ if (drv->drained_poll) {
+ return drv->drained_poll(bjob);
+ } else {
+ return true;
+ }
+}
+
+static void child_job_drained_end(BdrvChild *c)
+{
+ BlockJob *job = c->opaque;
+ job_resume(&job->job);
+}
+
+static const BdrvChildRole child_job = {
+ .get_parent_desc = child_job_get_parent_desc,
+ .drained_begin = child_job_drained_begin,
+ .drained_poll = child_job_drained_poll,
+ .drained_end = child_job_drained_end,
+ .stay_at_node = true,
+};
+
void block_job_remove_all_bdrv(BlockJob *job)
{
GSList *l;
return 0;
}
-void *block_job_create(const char *job_id, const BlockJobDriver *driver,
- BlockDriverState *bs, uint64_t perm,
- uint64_t shared_perm, int64_t speed, int flags,
- BlockCompletionFunc *cb, void *opaque, Error **errp)
+static void block_job_on_idle(Notifier *n, void *opaque)
{
- BlockBackend *blk;
- BlockJob *job;
- int ret;
-
- if (bs->job) {
- error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
- return NULL;
- }
-
- if (job_id == NULL && !(flags & BLOCK_JOB_INTERNAL)) {
- job_id = bdrv_get_device_name(bs);
- if (!*job_id) {
- error_setg(errp, "An explicit job ID is required for this node");
- return NULL;
- }
- }
-
- if (job_id) {
- if (flags & BLOCK_JOB_INTERNAL) {
- error_setg(errp, "Cannot specify job ID for internal block job");
- return NULL;
- }
-
- if (!id_wellformed(job_id)) {
- error_setg(errp, "Invalid job ID '%s'", job_id);
- return NULL;
- }
-
- if (block_job_get(job_id)) {
- error_setg(errp, "Job ID '%s' already in use", job_id);
- return NULL;
- }
- }
-
- blk = blk_new(perm, shared_perm);
- ret = blk_insert_bs(blk, bs, errp);
- if (ret < 0) {
- blk_unref(blk);
- return NULL;
- }
-
- job = g_malloc0(driver->instance_size);
- error_setg(&job->blocker, "block device is in use by block job: %s",
- BlockJobType_lookup[driver->job_type]);
- block_job_add_bdrv(job, "main node", bs, 0, BLK_PERM_ALL, &error_abort);
- bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker);
-
- job->driver = driver;
- job->id = g_strdup(job_id);
- job->blk = blk;
- job->cb = cb;
- job->opaque = opaque;
- job->busy = false;
- job->paused = true;
- job->pause_count = 1;
- job->refcnt = 1;
- bs->job = job;
-
- QLIST_INSERT_HEAD(&block_jobs, job, job_list);
-
- blk_add_aio_context_notifier(blk, block_job_attached_aio_context,
- block_job_detach_aio_context, job);
-
- /* Only set speed when necessary to avoid NotSupported error */
- if (speed != 0) {
- Error *local_err = NULL;
-
- block_job_set_speed(job, speed, &local_err);
- if (local_err) {
- block_job_unref(job);
- error_propagate(errp, local_err);
- return NULL;
- }
- }
- return job;
+ aio_wait_kick();
}
bool block_job_is_internal(BlockJob *job)
{
- return (job->id == NULL);
+ return (job->job.id == NULL);
}
-static bool block_job_started(BlockJob *job)
+const BlockJobDriver *block_job_driver(BlockJob *job)
{
- return job->co;
+ return container_of(job->job.driver, BlockJobDriver, job_driver);
}
-void block_job_start(BlockJob *job)
+/* Assumes the job_mutex is held */
+static bool job_timer_pending(Job *job)
{
- assert(job && !block_job_started(job) && job->paused &&
- !job->busy && job->driver->start);
- job->co = qemu_coroutine_create(job->driver->start, job);
- if (--job->pause_count == 0) {
- job->paused = false;
- job->busy = true;
- qemu_coroutine_enter(job->co);
- }
+ return timer_pending(&job->sleep_timer);
}
-void block_job_ref(BlockJob *job)
-{
- ++job->refcnt;
-}
-
-void block_job_unref(BlockJob *job)
-{
- if (--job->refcnt == 0) {
- BlockDriverState *bs = blk_bs(job->blk);
- bs->job = NULL;
- block_job_remove_all_bdrv(job);
- blk_remove_aio_context_notifier(job->blk,
- block_job_attached_aio_context,
- block_job_detach_aio_context, job);
- blk_unref(job->blk);
- error_free(job->blocker);
- g_free(job->id);
- QLIST_REMOVE(job, job_list);
- g_free(job);
- }
-}
-
-static void block_job_completed_single(BlockJob *job)
+void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
{
- if (!job->ret) {
- if (job->driver->commit) {
- job->driver->commit(job);
- }
- } else {
- if (job->driver->abort) {
- job->driver->abort(job);
- }
- }
- if (job->driver->clean) {
- job->driver->clean(job);
- }
+ int64_t old_speed = job->speed;
- if (job->cb) {
- job->cb(job->opaque, job->ret);
+ if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) {
+ return;
}
-
- /* Emit events only if we actually started */
- if (block_job_started(job)) {
- if (block_job_is_cancelled(job)) {
- block_job_event_cancelled(job);
- } else {
- const char *msg = NULL;
- if (job->ret < 0) {
- msg = strerror(-job->ret);
- }
- block_job_event_completed(job, msg);
- }
+ if (speed < 0) {
+ error_setg(errp, QERR_INVALID_PARAMETER, "speed");
+ return;
}
- if (job->txn) {
- QLIST_REMOVE(job, txn_list);
- block_job_txn_unref(job->txn);
- }
- block_job_unref(job);
-}
+ ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME);
-static void block_job_completed_txn_abort(BlockJob *job)
-{
- AioContext *ctx;
- BlockJobTxn *txn = job->txn;
- BlockJob *other_job, *next;
-
- if (txn->aborting) {
- /*
- * We are cancelled by another job, which will handle everything.
- */
+ job->speed = speed;
+ if (speed && speed <= old_speed) {
return;
}
- txn->aborting = true;
- /* We are the first failed job. Cancel other jobs. */
- QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
- ctx = blk_get_aio_context(other_job->blk);
- aio_context_acquire(ctx);
- }
- QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
- if (other_job == job || other_job->completed) {
- /* Other jobs are "effectively" cancelled by us, set the status for
- * them; this job, however, may or may not be cancelled, depending
- * on the caller, so leave it. */
- if (other_job != job) {
- other_job->cancelled = true;
- }
- continue;
- }
- block_job_cancel_sync(other_job);
- assert(other_job->completed);
- }
- QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) {
- ctx = blk_get_aio_context(other_job->blk);
- block_job_completed_single(other_job);
- aio_context_release(ctx);
- }
-}
-static void block_job_completed_txn_success(BlockJob *job)
-{
- AioContext *ctx;
- BlockJobTxn *txn = job->txn;
- BlockJob *other_job, *next;
- /*
- * Successful completion, see if there are other running jobs in this
- * txn.
- */
- QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
- if (!other_job->completed) {
- return;
- }
- }
- /* We are the last completed job, commit the transaction. */
- QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) {
- ctx = blk_get_aio_context(other_job->blk);
- aio_context_acquire(ctx);
- assert(other_job->ret == 0);
- block_job_completed_single(other_job);
- aio_context_release(ctx);
- }
+ /* kick only if a timer is pending */
+ job_enter_cond(&job->job, job_timer_pending);
}
-void block_job_completed(BlockJob *job, int ret)
+int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n)
{
- assert(blk_bs(job->blk)->job == job);
- assert(!job->completed);
- job->completed = true;
- job->ret = ret;
- if (!job->txn) {
- block_job_completed_single(job);
- } else if (ret < 0 || block_job_is_cancelled(job)) {
- block_job_completed_txn_abort(job);
- } else {
- block_job_completed_txn_success(job);
+ if (!job->speed) {
+ return 0;
}
+
+ return ratelimit_calculate_delay(&job->limit, n);
}
-void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
+BlockJobInfo *block_job_query(BlockJob *job, Error **errp)
{
- Error *local_err = NULL;
+ BlockJobInfo *info;
- if (!job->driver->set_speed) {
- error_setg(errp, QERR_UNSUPPORTED);
- return;
- }
- job->driver->set_speed(job, speed, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
+ if (block_job_is_internal(job)) {
+ error_setg(errp, "Cannot query QEMU internal jobs");
+ return NULL;
}
-
- job->speed = speed;
+ info = g_new0(BlockJobInfo, 1);
+ info->type = g_strdup(job_type_str(&job->job));
+ info->device = g_strdup(job->job.id);
+ info->busy = atomic_read(&job->job.busy);
+ info->paused = job->job.pause_count > 0;
+ info->offset = job->job.progress_current;
+ info->len = job->job.progress_total;
+ info->speed = job->speed;
+ info->io_status = job->iostatus;
+ info->ready = job_is_ready(&job->job),
+ info->status = job->job.status;
+ info->auto_finalize = job->job.auto_finalize;
+ info->auto_dismiss = job->job.auto_dismiss;
+ info->has_error = job->job.ret != 0;
+ info->error = job->job.ret ? g_strdup(strerror(-job->job.ret)) : NULL;
+ return info;
}
-void block_job_complete(BlockJob *job, Error **errp)
+static void block_job_iostatus_set_err(BlockJob *job, int error)
{
- /* Should not be reachable via external interface for internal jobs */
- assert(job->id);
- if (job->pause_count || job->cancelled ||
- !block_job_started(job) || !job->driver->complete) {
- error_setg(errp, "The active block job '%s' cannot be completed",
- job->id);
- return;
+ if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
+ job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE :
+ BLOCK_DEVICE_IO_STATUS_FAILED;
}
-
- job->driver->complete(job, errp);
}
-void block_job_pause(BlockJob *job)
+static void block_job_event_cancelled(Notifier *n, void *opaque)
{
- job->pause_count++;
-}
-
-void block_job_user_pause(BlockJob *job)
-{
- job->user_paused = true;
- block_job_pause(job);
-}
+ BlockJob *job = opaque;
-static bool block_job_should_pause(BlockJob *job)
-{
- return job->pause_count > 0;
-}
+ if (block_job_is_internal(job)) {
+ return;
+ }
-bool block_job_user_paused(BlockJob *job)
-{
- return job ? job->user_paused : 0;
+ qapi_event_send_block_job_cancelled(job_type(&job->job),
+ job->job.id,
+ job->job.progress_total,
+ job->job.progress_current,
+ job->speed);
}
-void coroutine_fn block_job_pause_point(BlockJob *job)
+static void block_job_event_completed(Notifier *n, void *opaque)
{
- assert(job && block_job_started(job));
+ BlockJob *job = opaque;
+ const char *msg = NULL;
- if (!block_job_should_pause(job)) {
- return;
- }
- if (block_job_is_cancelled(job)) {
+ if (block_job_is_internal(job)) {
return;
}
- if (job->driver->pause) {
- job->driver->pause(job);
+ if (job->job.ret < 0) {
+ msg = strerror(-job->job.ret);
}
- if (block_job_should_pause(job) && !block_job_is_cancelled(job)) {
- job->paused = true;
- job->busy = false;
- qemu_coroutine_yield(); /* wait for block_job_resume() */
- job->busy = true;
- job->paused = false;
- }
-
- if (job->driver->resume) {
- job->driver->resume(job);
- }
+ qapi_event_send_block_job_completed(job_type(&job->job),
+ job->job.id,
+ job->job.progress_total,
+ job->job.progress_current,
+ job->speed,
+ !!msg,
+ msg);
}
-void block_job_resume(BlockJob *job)
+static void block_job_event_pending(Notifier *n, void *opaque)
{
- assert(job->pause_count > 0);
- job->pause_count--;
- if (job->pause_count) {
+ BlockJob *job = opaque;
+
+ if (block_job_is_internal(job)) {
return;
}
- block_job_enter(job);
-}
-void block_job_user_resume(BlockJob *job)
-{
- if (job && job->user_paused && job->pause_count > 0) {
- job->user_paused = false;
- block_job_resume(job);
- }
+ qapi_event_send_block_job_pending(job_type(&job->job),
+ job->job.id);
}
-void block_job_enter(BlockJob *job)
+static void block_job_event_ready(Notifier *n, void *opaque)
{
- if (job->co && !job->busy) {
- qemu_coroutine_enter(job->co);
- }
-}
+ BlockJob *job = opaque;
-void block_job_cancel(BlockJob *job)
-{
- if (block_job_started(job)) {
- job->cancelled = true;
- block_job_iostatus_reset(job);
- block_job_enter(job);
- } else {
- block_job_completed(job, -ECANCELED);
+ if (block_job_is_internal(job)) {
+ return;
}
-}
-bool block_job_is_cancelled(BlockJob *job)
-{
- return job->cancelled;
-}
-
-void block_job_iostatus_reset(BlockJob *job)
-{
- job->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
- if (job->driver->iostatus_reset) {
- job->driver->iostatus_reset(job);
- }
+ qapi_event_send_block_job_ready(job_type(&job->job),
+ job->job.id,
+ job->job.progress_total,
+ job->job.progress_current,
+ job->speed);
}
-static int block_job_finish_sync(BlockJob *job,
- void (*finish)(BlockJob *, Error **errp),
- Error **errp)
-{
- Error *local_err = NULL;
- int ret;
-
- assert(blk_bs(job->blk)->job == job);
- block_job_ref(job);
-
- finish(job, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- block_job_unref(job);
- return -EBUSY;
- }
- /* block_job_drain calls block_job_enter, and it should be enough to
- * induce progress until the job completes or moves to the main thread.
- */
- while (!job->deferred_to_main_loop && !job->completed) {
- block_job_drain(job);
- }
- while (!job->completed) {
- aio_poll(qemu_get_aio_context(), true);
- }
- ret = (job->cancelled && job->ret == 0) ? -ECANCELED : job->ret;
- block_job_unref(job);
- return ret;
-}
-
-/* A wrapper around block_job_cancel() taking an Error ** parameter so it may be
- * used with block_job_finish_sync() without the need for (rather nasty)
- * function pointer casts there. */
-static void block_job_cancel_err(BlockJob *job, Error **errp)
-{
- block_job_cancel(job);
-}
-
-int block_job_cancel_sync(BlockJob *job)
-{
- return block_job_finish_sync(job, &block_job_cancel_err, NULL);
-}
+/*
+ * API for block job drivers and the block layer. These functions are
+ * declared in blockjob_int.h.
+ */
-void block_job_cancel_sync_all(void)
+void *block_job_create(const char *job_id, const BlockJobDriver *driver,
+ JobTxn *txn, BlockDriverState *bs, uint64_t perm,
+ uint64_t shared_perm, int64_t speed, int flags,
+ BlockCompletionFunc *cb, void *opaque, Error **errp)
{
+ BlockBackend *blk;
BlockJob *job;
- AioContext *aio_context;
+ int ret;
- while ((job = QLIST_FIRST(&block_jobs))) {
- aio_context = blk_get_aio_context(job->blk);
- aio_context_acquire(aio_context);
- block_job_cancel_sync(job);
- aio_context_release(aio_context);
+ if (bs->job) {
+ error_setg(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
+ return NULL;
}
-}
-int block_job_complete_sync(BlockJob *job, Error **errp)
-{
- return block_job_finish_sync(job, &block_job_complete, errp);
-}
-
-void block_job_sleep_ns(BlockJob *job, QEMUClockType type, int64_t ns)
-{
- assert(job->busy);
+ if (job_id == NULL && !(flags & JOB_INTERNAL)) {
+ job_id = bdrv_get_device_name(bs);
+ }
- /* Check cancellation *before* setting busy = false, too! */
- if (block_job_is_cancelled(job)) {
- return;
+ blk = blk_new(perm, shared_perm);
+ ret = blk_insert_bs(blk, bs, errp);
+ if (ret < 0) {
+ blk_unref(blk);
+ return NULL;
}
- job->busy = false;
- if (!block_job_should_pause(job)) {
- co_aio_sleep_ns(blk_get_aio_context(job->blk), type, ns);
+ job = job_create(job_id, &driver->job_driver, txn, blk_get_aio_context(blk),
+ flags, cb, opaque, errp);
+ if (job == NULL) {
+ blk_unref(blk);
+ return NULL;
}
- job->busy = true;
- block_job_pause_point(job);
-}
+ assert(is_block_job(&job->job));
+ assert(job->job.driver->free == &block_job_free);
+ assert(job->job.driver->user_resume == &block_job_user_resume);
+ assert(job->job.driver->drain == &block_job_drain);
-void block_job_yield(BlockJob *job)
-{
- assert(job->busy);
+ job->blk = blk;
- /* Check cancellation *before* setting busy = false, too! */
- if (block_job_is_cancelled(job)) {
- return;
- }
+ 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;
+ job->ready_notifier.notify = block_job_event_ready;
+ job->idle_notifier.notify = block_job_on_idle;
- job->busy = false;
- if (!block_job_should_pause(job)) {
- qemu_coroutine_yield();
- }
- job->busy = true;
+ 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);
- block_job_pause_point(job);
-}
+ 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);
+ bs->job = job;
-BlockJobInfo *block_job_query(BlockJob *job, Error **errp)
-{
- BlockJobInfo *info;
+ bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker);
- if (block_job_is_internal(job)) {
- error_setg(errp, "Cannot query QEMU internal jobs");
- return NULL;
- }
- info = g_new0(BlockJobInfo, 1);
- info->type = g_strdup(BlockJobType_lookup[job->driver->job_type]);
- info->device = g_strdup(job->id);
- info->len = job->len;
- info->busy = job->busy;
- info->paused = job->pause_count > 0;
- info->offset = job->offset;
- info->speed = job->speed;
- info->io_status = job->iostatus;
- info->ready = job->ready;
- return info;
-}
+ blk_add_aio_context_notifier(blk, block_job_attached_aio_context,
+ block_job_detach_aio_context, job);
-static void block_job_iostatus_set_err(BlockJob *job, int error)
-{
- if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
- job->iostatus = error == ENOSPC ? BLOCK_DEVICE_IO_STATUS_NOSPACE :
- BLOCK_DEVICE_IO_STATUS_FAILED;
- }
-}
+ /* Only set speed when necessary to avoid NotSupported error */
+ if (speed != 0) {
+ Error *local_err = NULL;
-static void block_job_event_cancelled(BlockJob *job)
-{
- if (block_job_is_internal(job)) {
- return;
+ block_job_set_speed(job, speed, &local_err);
+ if (local_err) {
+ job_early_fail(&job->job);
+ error_propagate(errp, local_err);
+ return NULL;
+ }
}
- qapi_event_send_block_job_cancelled(job->driver->job_type,
- job->id,
- job->len,
- job->offset,
- job->speed,
- &error_abort);
+ return job;
}
-static void block_job_event_completed(BlockJob *job, const char *msg)
+void block_job_iostatus_reset(BlockJob *job)
{
- if (block_job_is_internal(job)) {
+ if (job->iostatus == BLOCK_DEVICE_IO_STATUS_OK) {
return;
}
-
- qapi_event_send_block_job_completed(job->driver->job_type,
- job->id,
- job->len,
- job->offset,
- job->speed,
- !!msg,
- msg,
- &error_abort);
+ assert(job->job.user_paused && job->job.pause_count > 0);
+ job->iostatus = BLOCK_DEVICE_IO_STATUS_OK;
}
-void block_job_event_ready(BlockJob *job)
+void block_job_user_resume(Job *job)
{
- job->ready = true;
-
- if (block_job_is_internal(job)) {
- return;
- }
-
- qapi_event_send_block_job_ready(job->driver->job_type,
- job->id,
- job->len,
- job->offset,
- job->speed, &error_abort);
+ BlockJob *bjob = container_of(job, BlockJob, job);
+ block_job_iostatus_reset(bjob);
}
BlockErrorAction block_job_error_action(BlockJob *job, BlockdevOnError on_err,
abort();
}
if (!block_job_is_internal(job)) {
- qapi_event_send_block_job_error(job->id,
+ qapi_event_send_block_job_error(job->job.id,
is_read ? IO_OPERATION_TYPE_READ :
IO_OPERATION_TYPE_WRITE,
- action, &error_abort);
+ action);
}
if (action == BLOCK_ERROR_ACTION_STOP) {
+ job_pause(&job->job);
/* make the pause user visible, which will be resumed from QMP. */
- block_job_user_pause(job);
+ job->job.user_paused = true;
block_job_iostatus_set_err(job, error);
}
return action;
}
-
-typedef struct {
- BlockJob *job;
- AioContext *aio_context;
- BlockJobDeferToMainLoopFn *fn;
- void *opaque;
-} BlockJobDeferToMainLoopData;
-
-static void block_job_defer_to_main_loop_bh(void *opaque)
-{
- BlockJobDeferToMainLoopData *data = opaque;
- AioContext *aio_context;
-
- /* Prevent race with block_job_defer_to_main_loop() */
- aio_context_acquire(data->aio_context);
-
- /* Fetch BDS AioContext again, in case it has changed */
- aio_context = blk_get_aio_context(data->job->blk);
- aio_context_acquire(aio_context);
-
- data->job->deferred_to_main_loop = false;
- data->fn(data->job, data->opaque);
-
- aio_context_release(aio_context);
-
- aio_context_release(data->aio_context);
-
- g_free(data);
-}
-
-void block_job_defer_to_main_loop(BlockJob *job,
- BlockJobDeferToMainLoopFn *fn,
- void *opaque)
-{
- BlockJobDeferToMainLoopData *data = g_malloc(sizeof(*data));
- data->job = job;
- data->aio_context = blk_get_aio_context(job->blk);
- data->fn = fn;
- data->opaque = opaque;
- job->deferred_to_main_loop = true;
-
- aio_bh_schedule_oneshot(qemu_get_aio_context(),
- block_job_defer_to_main_loop_bh, data);
-}
-
-BlockJobTxn *block_job_txn_new(void)
-{
- BlockJobTxn *txn = g_new0(BlockJobTxn, 1);
- QLIST_INIT(&txn->jobs);
- txn->refcnt = 1;
- return txn;
-}
-
-static void block_job_txn_ref(BlockJobTxn *txn)
-{
- txn->refcnt++;
-}
-
-void block_job_txn_unref(BlockJobTxn *txn)
-{
- if (txn && --txn->refcnt == 0) {
- g_free(txn);
- }
-}
-
-void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job)
-{
- if (!txn) {
- return;
- }
-
- assert(!job->txn);
- job->txn = txn;
-
- QLIST_INSERT_HEAD(&txn->jobs, job, txn_list);
- block_job_txn_ref(txn);
-}
projects / mirror_qemu.git / blobdiff