*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
#include "block/block.h"
#include "block/blockjob_int.h"
#include "block/block_int.h"
}
}
-static void block_job_attached_aio_context(AioContext *new_context,
- void *opaque);
-static void block_job_detach_aio_context(void *opaque);
-
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);
-
- job->job.aio_context = new_context;
- if (bjdrv->attached_aio_context) {
- bjdrv->attached_aio_context(job, new_context);
- }
-
- job_resume(&job->job);
-}
-
void block_job_drain(Job *job)
{
BlockJob *bjob = container_of(job, BlockJob, job);
}
}
-static void block_job_detach_aio_context(void *opaque)
+static char *child_job_get_parent_desc(BdrvChild *c)
{
- BlockJob *job = opaque;
-
- /* In case the job terminates during aio_poll()... */
- job_ref(&job->job);
+ 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);
+}
- while (!job->job.paused && !job_is_completed(&job->job)) {
- job_drain(&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;
}
- job->job.aio_context = NULL;
- job_unref(&job->job);
+ /* 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 char *child_job_get_parent_desc(BdrvChild *c)
+static void child_job_drained_end(BdrvChild *c)
{
BlockJob *job = c->opaque;
- return g_strdup_printf("%s job '%s'", job_type_str(&job->job), job->job.id);
+ job_resume(&job->job);
}
-static void child_job_drained_begin(BdrvChild *c)
+static bool child_job_can_set_aio_ctx(BdrvChild *c, AioContext *ctx,
+ GSList **ignore, Error **errp)
{
BlockJob *job = c->opaque;
- job_pause(&job->job);
+ GSList *l;
+
+ for (l = job->nodes; l; l = l->next) {
+ BdrvChild *sibling = l->data;
+ if (!bdrv_child_can_set_aio_context(sibling, ctx, ignore, errp)) {
+ return false;
+ }
+ }
+ return true;
}
-static void child_job_drained_end(BdrvChild *c)
+static void child_job_set_aio_ctx(BdrvChild *c, AioContext *ctx,
+ GSList **ignore)
{
BlockJob *job = c->opaque;
- job_resume(&job->job);
+ GSList *l;
+
+ for (l = job->nodes; l; l = l->next) {
+ BdrvChild *sibling = l->data;
+ if (g_slist_find(*ignore, sibling)) {
+ continue;
+ }
+ *ignore = g_slist_prepend(*ignore, sibling);
+ bdrv_set_aio_context_ignore(sibling->bs, ctx, ignore);
+ }
+
+ job->job.aio_context = ctx;
}
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,
+ .can_set_aio_ctx = child_job_can_set_aio_ctx,
+ .set_aio_ctx = child_job_set_aio_ctx,
.stay_at_node = true,
};
job->nodes = NULL;
}
+bool block_job_has_bdrv(BlockJob *job, BlockDriverState *bs)
+{
+ GSList *el;
+
+ for (el = job->nodes; el; el = el->next) {
+ BdrvChild *c = el->data;
+ if (c->bs == bs) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
int block_job_add_bdrv(BlockJob *job, const char *name, BlockDriverState *bs,
uint64_t perm, uint64_t shared_perm, Error **errp)
{
BdrvChild *c;
- c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm,
- job, errp);
+ bdrv_ref(bs);
+ if (job->job.aio_context != qemu_get_aio_context()) {
+ aio_context_release(job->job.aio_context);
+ }
+ c = bdrv_root_attach_child(bs, name, &child_job, job->job.aio_context,
+ perm, shared_perm, job, errp);
+ if (job->job.aio_context != qemu_get_aio_context()) {
+ aio_context_acquire(job->job.aio_context);
+ }
if (c == NULL) {
return -EPERM;
}
job->nodes = g_slist_prepend(job->nodes, c);
- bdrv_ref(bs);
bdrv_op_block_all(bs, job->blocker);
return 0;
}
+static void block_job_on_idle(Notifier *n, void *opaque)
+{
+ aio_wait_kick();
+}
+
bool block_job_is_internal(BlockJob *job)
{
return (job->job.id == NULL);
job->job.id,
job->job.progress_total,
job->job.progress_current,
- job->speed,
- &error_abort);
+ job->speed);
}
static void block_job_event_completed(Notifier *n, void *opaque)
job->job.progress_current,
job->speed,
!!msg,
- msg,
- &error_abort);
+ msg);
}
static void block_job_event_pending(Notifier *n, void *opaque)
}
qapi_event_send_block_job_pending(job_type(&job->job),
- job->job.id,
- &error_abort);
+ job->job.id);
}
static void block_job_event_ready(Notifier *n, void *opaque)
job->job.id,
job->job.progress_total,
job->job.progress_current,
- job->speed, &error_abort);
+ job->speed);
}
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 & JOB_INTERNAL)) {
job_id = bdrv_get_device_name(bs);
}
- blk = blk_new(perm, shared_perm);
+ blk = blk_new(bdrv_get_aio_context(bs), perm, shared_perm);
ret = blk_insert_bs(blk, bs, errp);
if (ret < 0) {
blk_unref(blk);
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;
notifier_list_add(&job->job.on_finalize_cancelled,
&job->finalize_cancelled_notifier);
&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);
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;
bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker);
- blk_add_aio_context_notifier(blk, block_job_attached_aio_context,
- block_job_detach_aio_context, job);
+ blk_set_allow_aio_context_change(blk, true);
/* Only set speed when necessary to avoid NotSupported error */
if (speed != 0) {
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. */
- job->job.user_paused = true;
+ if (!job->job.user_paused) {
+ job_pause(&job->job);
+ /* make the pause user visible, which will be resumed from QMP. */
+ job->job.user_paused = true;
+ }
block_job_iostatus_set_err(job, error);
}
return action;
projects / mirror_qemu.git / blobdiff