*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
#include "block/block.h"
#include "block/blockjob_int.h"
#include "block/block_int.h"
#include "qapi/qapi-events-block-core.h"
#include "qapi/qmp/qerror.h"
#include "qemu/coroutine.h"
+#include "qemu/main-loop.h"
#include "qemu/timer.h"
/*
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_unref(bjob->blk);
error_free(bjob->blocker);
}
-void block_job_drain(Job *job)
-{
- BlockJob *bjob = container_of(job, BlockJob, job);
- const JobDriver *drv = job->driver;
- BlockJobDriver *bjdrv = container_of(drv, BlockJobDriver, job_driver);
-
- blk_drain(bjob->blk);
- if (bjdrv->drain) {
- bjdrv->drain(bjob);
- }
-}
-
static char *child_job_get_parent_desc(BdrvChild *c)
{
BlockJob *job = c->opaque;
}
}
-static void child_job_drained_end(BdrvChild *c)
+static void child_job_drained_end(BdrvChild *c, int *drained_end_counter)
{
BlockJob *job = c->opaque;
job_resume(&job->job);
job->job.aio_context = ctx;
}
-static const BdrvChildRole child_job = {
+static const BdrvChildClass child_job = {
.get_parent_desc = child_job_get_parent_desc,
.drained_begin = child_job_drained_begin,
.drained_poll = child_job_drained_poll,
void block_job_remove_all_bdrv(BlockJob *job)
{
- GSList *l;
- for (l = job->nodes; l; l = l->next) {
+ /*
+ * bdrv_root_unref_child() may reach child_job_[can_]set_aio_ctx(),
+ * which will also traverse job->nodes, so consume the list one by
+ * one to make sure that such a concurrent access does not attempt
+ * to process an already freed BdrvChild.
+ */
+ while (job->nodes) {
+ GSList *l = job->nodes;
BdrvChild *c = l->data;
+
+ job->nodes = l->next;
+
bdrv_op_unblock_all(c->bs, job->blocker);
bdrv_root_unref_child(c);
+
+ g_slist_free_1(l);
}
- g_slist_free(job->nodes);
- 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;
+ bool need_context_ops;
+
+ bdrv_ref(bs);
+
+ need_context_ops = bdrv_get_aio_context(bs) != job->job.aio_context;
- c = bdrv_root_attach_child(bs, name, &child_job, perm, shared_perm,
- job, errp);
+ if (need_context_ops && job->job.aio_context != qemu_get_aio_context()) {
+ aio_context_release(job->job.aio_context);
+ }
+ c = bdrv_root_attach_child(bs, name, &child_job, 0,
+ job->job.aio_context, perm, shared_perm, job,
+ errp);
+ if (need_context_ops && 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;
return timer_pending(&job->sleep_timer);
}
-void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
+bool block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
{
+ const BlockJobDriver *drv = block_job_driver(job);
int64_t old_speed = job->speed;
- if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp)) {
- return;
+ if (job_apply_verb(&job->job, JOB_VERB_SET_SPEED, errp) < 0) {
+ return false;
}
if (speed < 0) {
- error_setg(errp, QERR_INVALID_PARAMETER, "speed");
- return;
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "speed",
+ "a non-negative value");
+ return false;
}
ratelimit_set_speed(&job->limit, speed, BLOCK_JOB_SLICE_TIME);
job->speed = speed;
+
+ if (drv->set_speed) {
+ drv->set_speed(job, speed);
+ }
+
if (speed && speed <= old_speed) {
- return;
+ return true;
}
/* kick only if a timer is pending */
job_enter_cond(&job->job, job_timer_pending);
+
+ return true;
}
int64_t block_job_ratelimit_get_delay(BlockJob *job, uint64_t n)
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->busy = qatomic_read(&job->job.busy);
info->paused = job->job.pause_count > 0;
- info->offset = job->job.progress_current;
- info->len = job->job.progress_total;
+ 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;
+ if (job->job.ret) {
+ info->has_error = true;
+ info->error = job->job.err ?
+ g_strdup(error_get_pretty(job->job.err)) :
+ g_strdup(strerror(-job->job.ret));
+ }
return info;
}
qapi_event_send_block_job_cancelled(job_type(&job->job),
job->job.id,
- job->job.progress_total,
- job->job.progress_current,
+ job->job.progress.total,
+ job->job.progress.current,
job->speed);
}
}
if (job->job.ret < 0) {
- msg = strerror(-job->job.ret);
+ msg = error_get_pretty(job->job.err);
}
qapi_event_send_block_job_completed(job_type(&job->job),
job->job.id,
- job->job.progress_total,
- job->job.progress_current,
+ job->job.progress.total,
+ job->job.progress.current,
job->speed,
!!msg,
msg);
qapi_event_send_block_job_ready(job_type(&job->job),
job->job.id,
- job->job.progress_total,
- job->job.progress_current,
+ job->job.progress.total,
+ job->job.progress.current,
job->speed);
}
{
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 & JOB_INTERNAL)) {
job_id = bdrv_get_device_name(bs);
}
- blk = blk_new(perm, shared_perm);
- ret = blk_insert_bs(blk, bs, errp);
- if (ret < 0) {
- blk_unref(blk);
+ blk = blk_new_with_bs(bs, perm, shared_perm, errp);
+ if (!blk) {
return NULL;
}
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);
job->blk = blk;
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);
+ /* Disable request queuing in the BlockBackend to avoid deadlocks on drain:
+ * The job reports that it's busy until it reaches a pause point. */
+ blk_set_disable_request_queuing(blk, true);
blk_set_allow_aio_context_change(blk, true);
/* 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) {
+ if (!block_job_set_speed(job, speed, errp)) {
job_early_fail(&job->job);
- error_propagate(errp, local_err);
return NULL;
}
}
projects / mirror_qemu.git / blobdiff