return blk->root ? blk->root->bs : NULL;
}
-static BlockBackend *bdrv_first_blk(BlockDriverState *bs)
+static BlockBackend * GRAPH_RDLOCK bdrv_first_blk(BlockDriverState *bs)
{
BdrvChild *child;
GLOBAL_STATE_CODE();
+ assert_bdrv_graph_readable();
QLIST_FOREACH(child, &bs->parents, next_parent) {
if (child->klass == &child_root) {
BdrvChild *c;
GLOBAL_STATE_CODE();
+ assert_bdrv_graph_readable();
+
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (c->klass != &child_root) {
return false;
/*
* Disassociates the currently associated BlockDriverState from @blk.
+ *
+ * The caller must hold the AioContext lock for the BlockBackend.
*/
void blk_remove_bs(BlockBackend *blk)
{
ThrottleGroupMember *tgm = &blk->public.throttle_group_member;
BdrvChild *root;
+ AioContext *ctx;
GLOBAL_STATE_CODE();
root = blk->root;
blk->root = NULL;
- bdrv_graph_wrlock(NULL);
+ ctx = bdrv_get_aio_context(root->bs);
+ bdrv_graph_wrlock(root->bs);
bdrv_root_unref_child(root);
- bdrv_graph_wrunlock();
+ bdrv_graph_wrunlock_ctx(ctx);
}
/*
int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp)
{
ThrottleGroupMember *tgm = &blk->public.throttle_group_member;
+ AioContext *ctx = bdrv_get_aio_context(bs);
+
GLOBAL_STATE_CODE();
bdrv_ref(bs);
+ bdrv_graph_wrlock(bs);
blk->root = bdrv_root_attach_child(bs, "root", &child_root,
BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY,
blk->perm, blk->shared_perm,
blk, errp);
+ bdrv_graph_wrunlock_ctx(ctx);
if (blk->root == NULL) {
return -EPERM;
}
/* throttling disk I/O */
if (blk->public.throttle_group_member.throttle_state) {
throttle_group_co_io_limits_intercept(&blk->public.throttle_group_member,
- bytes, false);
+ bytes, THROTTLE_READ);
}
ret = bdrv_co_preadv_part(blk->root, offset, bytes, qiov, qiov_offset,
/* throttling disk I/O */
if (blk->public.throttle_group_member.throttle_state) {
throttle_group_co_io_limits_intercept(&blk->public.throttle_group_member,
- bytes, true);
+ bytes, THROTTLE_WRITE);
}
if (!blk->enable_write_cache) {
acb->blk = blk;
acb->ret = ret;
- replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
+ replay_bh_schedule_oneshot_event(qemu_get_current_aio_context(),
error_callback_bh, acb);
return &acb->common;
}
acb->has_returned = false;
co = qemu_coroutine_create(co_entry, acb);
- aio_co_enter(blk_get_aio_context(blk), co);
+ aio_co_enter(qemu_get_current_aio_context(), co);
acb->has_returned = true;
if (acb->rwco.ret != NOT_DONE) {
- replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
+ replay_bh_schedule_oneshot_event(qemu_get_current_aio_context(),
blk_aio_complete_bh, acb);
}
acb->has_returned = false;
co = qemu_coroutine_create(blk_aio_zone_report_entry, acb);
- aio_co_enter(blk_get_aio_context(blk), co);
+ aio_co_enter(qemu_get_current_aio_context(), co);
acb->has_returned = true;
if (acb->rwco.ret != NOT_DONE) {
- replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
+ replay_bh_schedule_oneshot_event(qemu_get_current_aio_context(),
blk_aio_complete_bh, acb);
}
acb->has_returned = false;
co = qemu_coroutine_create(blk_aio_zone_mgmt_entry, acb);
- aio_co_enter(blk_get_aio_context(blk), co);
+ aio_co_enter(qemu_get_current_aio_context(), co);
acb->has_returned = true;
if (acb->rwco.ret != NOT_DONE) {
- replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
+ replay_bh_schedule_oneshot_event(qemu_get_current_aio_context(),
blk_aio_complete_bh, acb);
}
acb->has_returned = false;
co = qemu_coroutine_create(blk_aio_zone_append_entry, acb);
- aio_co_enter(blk_get_aio_context(blk), co);
+ aio_co_enter(qemu_get_current_aio_context(), co);
acb->has_returned = true;
if (acb->rwco.ret != NOT_DONE) {
- replay_bh_schedule_oneshot_event(blk_get_aio_context(blk),
+ replay_bh_schedule_oneshot_event(qemu_get_current_aio_context(),
blk_aio_complete_bh, acb);
}
if (qemu_in_coroutine()) {
bdrv_co_activate(bs, errp);
} else {
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
bdrv_activate(bs, errp);
}
}
{
BlockDriverState *bs = blk_bs(blk);
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
if (!bs) {
return false;
int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!blk_is_available(blk)) {
return -ENOMEDIUM;
}
{
BlockBackend *blk = NULL;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
while ((blk = blk_all_next(blk)) != NULL) {
AioContext *aio_context = blk_get_aio_context(blk);
int blk_make_empty(BlockBackend *blk, Error **errp)
{
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!blk_is_available(blk)) {
error_setg(errp, "No medium inserted");
return -ENOMEDIUM;