Signed-off-by: Emanuele Giuseppe Esposito <eespo...@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
---
block.c | 18 ++++++++++++++++++
block/create.c | 10 ++++++++++
2 files changed, 28 insertions(+)
diff --git a/block.c b/block.c
index b77ab0a104..180884b8c0 100644
--- a/block.c
+++ b/block.c
@@ -526,6 +526,7 @@ static void coroutine_fn bdrv_create_co_entry(void *opaque)
CreateCo *cco = opaque;
assert(cco->drv);
+ assert(qemu_in_main_thread());
ret = cco->drv->bdrv_co_create_opts(cco->drv,
cco->filename, cco->opts, &local_err);
@@ -1090,6 +1091,7 @@ int refresh_total_sectors(BlockDriverState *bs, int64_t
hint)
static void bdrv_join_options(BlockDriverState *bs, QDict *options,
QDict *old_options)
{
+ assert(qemu_in_main_thread());
if (bs->drv && bs->drv->bdrv_join_options) {
bs->drv->bdrv_join_options(options, old_options);
} else {
@@ -1598,6 +1600,7 @@ static int bdrv_open_driver(BlockDriverState *bs,
BlockDriver *drv,
{
Error *local_err = NULL;
int i, ret;
+ assert(qemu_in_main_thread());
bdrv_assign_node_name(bs, node_name, &local_err);
if (local_err) {
@@ -1989,6 +1992,8 @@ static int bdrv_fill_options(QDict **options, const char
*filename,
BlockDriver *drv = NULL;
Error *local_err = NULL;
+ assert(qemu_in_main_thread());
+
/*
* Caution: while qdict_get_try_str() is fine, getting non-string
* types would require more care. When @options come from
@@ -2182,6 +2187,7 @@ static void bdrv_child_perm(BlockDriverState *bs,
BlockDriverState *child_bs,
uint64_t *nperm, uint64_t *nshared)
{
assert(bs->drv && bs->drv->bdrv_child_perm);
+ assert(qemu_in_main_thread());
bs->drv->bdrv_child_perm(bs, c, role, reopen_queue,
parent_perm, parent_shared,
nperm, nshared);
@@ -2267,6 +2273,7 @@ static void bdrv_drv_set_perm_commit(void *opaque)
{
BlockDriverState *bs = opaque;
uint64_t cumulative_perms, cumulative_shared_perms;
+ assert(qemu_in_main_thread());
if (bs->drv->bdrv_set_perm) {
bdrv_get_cumulative_perm(bs, &cumulative_perms,
@@ -2278,6 +2285,7 @@ static void bdrv_drv_set_perm_commit(void *opaque)
static void bdrv_drv_set_perm_abort(void *opaque)
{
BlockDriverState *bs = opaque;
+ assert(qemu_in_main_thread());
if (bs->drv->bdrv_abort_perm_update) {
bs->drv->bdrv_abort_perm_update(bs);
@@ -2293,6 +2301,7 @@ static int bdrv_drv_set_perm(BlockDriverState *bs,
uint64_t perm,
uint64_t shared_perm, Transaction *tran,
Error **errp)
{
+ assert(qemu_in_main_thread());
if (!bs->drv) {
return 0;
}
@@ -4357,6 +4366,7 @@ int bdrv_reopen_multiple(BlockReopenQueue *bs_queue,
Error **errp)
assert(qemu_get_current_aio_context() == qemu_get_aio_context());
assert(bs_queue != NULL);
+ assert(qemu_in_main_thread());
QTAILQ_FOREACH(bs_entry, bs_queue, entry) {
ctx = bdrv_get_aio_context(bs_entry->state.bs);
@@ -4622,6 +4632,7 @@ static int bdrv_reopen_prepare(BDRVReopenState
*reopen_state,
assert(reopen_state != NULL);
assert(reopen_state->bs->drv != NULL);
+ assert(qemu_in_main_thread());
drv = reopen_state->bs->drv;
/* This function and each driver's bdrv_reopen_prepare() remove
@@ -4832,6 +4843,7 @@ static void bdrv_reopen_commit(BDRVReopenState
*reopen_state)
bs = reopen_state->bs;
drv = bs->drv;
assert(drv != NULL);
+ assert(qemu_in_main_thread());
/* If there are any driver level actions to take */
if (drv->bdrv_reopen_commit) {
@@ -4873,6 +4885,7 @@ static void bdrv_reopen_abort(BDRVReopenState
*reopen_state)
assert(reopen_state != NULL);
drv = reopen_state->bs->drv;
assert(drv != NULL);
+ assert(qemu_in_main_thread());
if (drv->bdrv_reopen_abort) {
drv->bdrv_reopen_abort(reopen_state);
@@ -4886,6 +4899,7 @@ static void bdrv_close(BlockDriverState *bs)
BdrvChild *child, *next;
assert(!bs->refcnt);
+ assert(qemu_in_main_thread());
bdrv_drained_begin(bs); /* complete I/O */
bdrv_flush(bs);
@@ -6671,6 +6685,8 @@ static int bdrv_inactivate_recurse(BlockDriverState *bs)
int ret;
uint64_t cumulative_perms, cumulative_shared_perms;
+ assert(qemu_in_main_thread());
+
if (!bs->drv) {
return -ENOMEDIUM;
}
@@ -7180,6 +7196,7 @@ static void bdrv_detach_aio_context(BlockDriverState *bs)
BdrvAioNotifier *baf, *baf_tmp;
assert(!bs->walking_aio_notifiers);
+ assert(qemu_in_main_thread());
bs->walking_aio_notifiers = true;
QLIST_FOREACH_SAFE(baf, &bs->aio_notifiers, list, baf_tmp) {
if (baf->deleted) {
@@ -7207,6 +7224,7 @@ static void bdrv_attach_aio_context(BlockDriverState *bs,
AioContext *new_context)
{
BdrvAioNotifier *ban, *ban_tmp;
+ assert(qemu_in_main_thread());
if (bs->quiesce_counter) {
aio_disable_external(new_context);
diff --git a/block/create.c b/block/create.c
index 89812669df..0167118579 100644
--- a/block/create.c
+++ b/block/create.c
@@ -42,6 +42,16 @@ static int coroutine_fn blockdev_create_run(Job *job, Error
**errp)
BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common);
int ret;
+ /*
+ * Currently there is nothing preventing this
+ * function from being called in an iothread context.
+ * However, since it will crash anyways because of the
+ * aiocontext lock not taken, we might as well make it
+ * crash with a more meaningful error, by checking that
+ * we are in the main loop
+ */
+ assert(qemu_in_main_thread());
+
job_progress_set_remaining(&s->common, 1);
ret = s->drv->bdrv_co_create(s->opts, errp);
job_progress_update(&s->common, 1);
--
2.27.0
