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assertions for block global state API

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All the global state (GS) API functions will check that
qemu_in_main_thread() returns true. If not, it means
that the safety of BQL cannot be guaranteed, and
they need to be moved to I/O.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220303151616.325444-5-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Emanuele Giuseppe Esposito 2022-03-03 10:15:49 -05:00 committed by Kevin Wolf
parent 3b491a9056
commit f791bf7f93
4 changed files with 137 additions and 2 deletions
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125
block.c
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@ -387,12 +387,14 @@ static char *bdrv_make_absolute_filename(BlockDriverState *relative_to,
char *bdrv_get_full_backing_filename(BlockDriverState *bs, Error **errp)
{
GLOBAL_STATE_CODE();
return bdrv_make_absolute_filename(bs, bs->backing_file, errp);
}
void bdrv_register(BlockDriver *bdrv)
{
assert(bdrv->format_name);
GLOBAL_STATE_CODE();
QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list);
}
@ -401,6 +403,8 @@ BlockDriverState *bdrv_new(void)
BlockDriverState *bs;
int i;
GLOBAL_STATE_CODE();
bs = g_new0(BlockDriverState, 1);
QLIST_INIT(&bs->dirty_bitmaps);
for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) {
@ -443,6 +447,8 @@ BlockDriver *bdrv_find_format(const char *format_name)
BlockDriver *drv1;
int i;
GLOBAL_STATE_CODE();
drv1 = bdrv_do_find_format(format_name);
if (drv1) {
return drv1;
@ -492,6 +498,7 @@ static int bdrv_format_is_whitelisted(const char *format_name, bool read_only)
int bdrv_is_whitelisted(BlockDriver *drv, bool read_only)
{
GLOBAL_STATE_CODE();
return bdrv_format_is_whitelisted(drv->format_name, read_only);
}
@ -527,6 +534,8 @@ int bdrv_create(BlockDriver *drv, const char* filename,
{
int ret;
GLOBAL_STATE_CODE();
Coroutine *co;
CreateCo cco = {
.drv = drv,
@ -702,6 +711,8 @@ int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp)
QDict *qdict;
int ret;
GLOBAL_STATE_CODE();
drv = bdrv_find_protocol(filename, true, errp);
if (drv == NULL) {
return -ENOENT;
@ -799,6 +810,7 @@ int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
{
BlockDriver *drv = bs->drv;
BlockDriverState *filtered = bdrv_filter_bs(bs);
GLOBAL_STATE_CODE();
if (drv && drv->bdrv_probe_blocksizes) {
return drv->bdrv_probe_blocksizes(bs, bsz);
@ -819,6 +831,7 @@ int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
{
BlockDriver *drv = bs->drv;
BlockDriverState *filtered = bdrv_filter_bs(bs);
GLOBAL_STATE_CODE();
if (drv && drv->bdrv_probe_geometry) {
return drv->bdrv_probe_geometry(bs, geo);
@ -910,6 +923,7 @@ BlockDriver *bdrv_find_protocol(const char *filename,
const char *p;
int i;
GLOBAL_STATE_CODE();
/* TODO Drivers without bdrv_file_open must be specified explicitly */
/*
@ -1634,6 +1648,8 @@ BlockDriverState *bdrv_new_open_driver_opts(BlockDriver *drv,
BlockDriverState *bs;
int ret;
GLOBAL_STATE_CODE();
bs = bdrv_new();
bs->open_flags = flags;
bs->options = options ?: qdict_new();
@ -1659,6 +1675,7 @@ BlockDriverState *bdrv_new_open_driver_opts(BlockDriver *drv,
BlockDriverState *bdrv_new_open_driver(BlockDriver *drv, const char *node_name,
int flags, Error **errp)
{
GLOBAL_STATE_CODE();
return bdrv_new_open_driver_opts(drv, node_name, NULL, flags, errp);
}
@ -3094,6 +3111,8 @@ BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs,
BdrvChild *child = NULL;
Transaction *tran = tran_new();
GLOBAL_STATE_CODE();
ret = bdrv_attach_child_noperm(parent_bs, child_bs, child_name, child_class,
child_role, &child, tran, errp);
if (ret < 0) {
@ -3120,6 +3139,8 @@ void bdrv_root_unref_child(BdrvChild *child)
{
BlockDriverState *child_bs;
GLOBAL_STATE_CODE();
child_bs = child->bs;
bdrv_detach_child(&child);
bdrv_unref(child_bs);
@ -3194,6 +3215,7 @@ static void bdrv_unset_inherits_from(BlockDriverState *root, BdrvChild *child,
/* Callers must ensure that child->frozen is false. */
void bdrv_unref_child(BlockDriverState *parent, BdrvChild *child)
{
GLOBAL_STATE_CODE();
if (child == NULL) {
return;
}
@ -3344,6 +3366,7 @@ int bdrv_set_backing_hd(BlockDriverState *bs, BlockDriverState *backing_hd,
int ret;
Transaction *tran = tran_new();
GLOBAL_STATE_CODE();
bdrv_drained_begin(bs);
ret = bdrv_set_backing_noperm(bs, backing_hd, tran, errp);
@ -3383,6 +3406,8 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options,
QDict *tmp_parent_options = NULL;
Error *local_err = NULL;
GLOBAL_STATE_CODE();
if (bs->backing != NULL) {
goto free_exit;
}
@ -3542,6 +3567,8 @@ BdrvChild *bdrv_open_child(const char *filename,
{
BlockDriverState *bs;
GLOBAL_STATE_CODE();
bs = bdrv_open_child_bs(filename, options, bdref_key, parent, child_class,
child_role, allow_none, errp);
if (bs == NULL) {
@ -3564,6 +3591,8 @@ BlockDriverState *bdrv_open_blockdev_ref(BlockdevRef *ref, Error **errp)
const char *reference = NULL;
Visitor *v = NULL;
GLOBAL_STATE_CODE();
if (ref->type == QTYPE_QSTRING) {
reference = ref->u.reference;
} else {
@ -3961,6 +3990,8 @@ close_and_fail:
BlockDriverState *bdrv_open(const char *filename, const char *reference,
QDict *options, int flags, Error **errp)
{
GLOBAL_STATE_CODE();
return bdrv_open_inherit(filename, reference, options, flags, NULL,
NULL, 0, errp);
}
@ -4215,12 +4246,15 @@ BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
BlockDriverState *bs,
QDict *options, bool keep_old_opts)
{
GLOBAL_STATE_CODE();
return bdrv_reopen_queue_child(bs_queue, bs, options, NULL, 0, false,
NULL, 0, keep_old_opts);
}
void bdrv_reopen_queue_free(BlockReopenQueue *bs_queue)
{
GLOBAL_STATE_CODE();
if (bs_queue) {
BlockReopenQueueEntry *bs_entry, *next;
QTAILQ_FOREACH_SAFE(bs_entry, bs_queue, entry, next) {
@ -4368,6 +4402,8 @@ int bdrv_reopen(BlockDriverState *bs, QDict *opts, bool keep_old_opts,
BlockReopenQueue *queue;
int ret;
GLOBAL_STATE_CODE();
bdrv_subtree_drained_begin(bs);
if (ctx != qemu_get_aio_context()) {
aio_context_release(ctx);
@ -4389,6 +4425,8 @@ int bdrv_reopen_set_read_only(BlockDriverState *bs, bool read_only,
{
QDict *opts = qdict_new();
GLOBAL_STATE_CODE();
qdict_put_bool(opts, BDRV_OPT_READ_ONLY, read_only);
return bdrv_reopen(bs, opts, true, errp);
@ -4784,6 +4822,7 @@ static void bdrv_close(BlockDriverState *bs)
BdrvAioNotifier *ban, *ban_next;
BdrvChild *child, *next;
GLOBAL_STATE_CODE();
assert(!bs->refcnt);
bdrv_drained_begin(bs); /* complete I/O */
@ -4843,6 +4882,7 @@ static void bdrv_close(BlockDriverState *bs)
void bdrv_close_all(void)
{
assert(job_next(NULL) == NULL);
GLOBAL_STATE_CODE();
/* Drop references from requests still in flight, such as canceled block
* jobs whose AIO context has not been polled yet */
@ -5157,11 +5197,15 @@ out:
int bdrv_replace_node(BlockDriverState *from, BlockDriverState *to,
Error **errp)
{
GLOBAL_STATE_CODE();
return bdrv_replace_node_common(from, to, true, false, errp);
}
int bdrv_drop_filter(BlockDriverState *bs, Error **errp)
{
GLOBAL_STATE_CODE();
return bdrv_replace_node_common(bs, bdrv_filter_or_cow_bs(bs), true, true,
errp);
}
@ -5184,6 +5228,8 @@ int bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top,
int ret;
Transaction *tran = tran_new();
GLOBAL_STATE_CODE();
assert(!bs_new->backing);
ret = bdrv_attach_child_noperm(bs_new, bs_top, "backing",
@ -5217,6 +5263,8 @@ int bdrv_replace_child_bs(BdrvChild *child, BlockDriverState *new_bs,
g_autoptr(GSList) refresh_list = NULL;
BlockDriverState *old_bs = child->bs;
GLOBAL_STATE_CODE();
bdrv_ref(old_bs);
bdrv_drained_begin(old_bs);
bdrv_drained_begin(new_bs);
@ -5244,6 +5292,7 @@ static void bdrv_delete(BlockDriverState *bs)
{
assert(bdrv_op_blocker_is_empty(bs));
assert(!bs->refcnt);
GLOBAL_STATE_CODE();
/* remove from list, if necessary */
if (bs->node_name[0] != '\0') {
@ -5288,6 +5337,8 @@ BlockDriverState *bdrv_insert_node(BlockDriverState *bs, QDict *options,
node_name = qdict_get_try_str(options, "node-name");
GLOBAL_STATE_CODE();
new_node_bs = bdrv_new_open_driver_opts(drv, node_name, options, flags,
errp);
options = NULL; /* bdrv_new_open_driver() eats options */
@ -5348,6 +5399,8 @@ int bdrv_change_backing_file(BlockDriverState *bs, const char *backing_file,
BlockDriver *drv = bs->drv;
int ret;
GLOBAL_STATE_CODE();
if (!drv) {
return -ENOMEDIUM;
}
@ -5389,6 +5442,9 @@ int bdrv_change_backing_file(BlockDriverState *bs, const char *backing_file,
BlockDriverState *bdrv_find_overlay(BlockDriverState *active,
BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
bs = bdrv_skip_filters(bs);
active = bdrv_skip_filters(active);
@ -5406,6 +5462,8 @@ BlockDriverState *bdrv_find_overlay(BlockDriverState *active,
/* Given a BDS, searches for the base layer. */
BlockDriverState *bdrv_find_base(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
return bdrv_find_overlay(bs, NULL);
}
@ -5420,6 +5478,8 @@ bool bdrv_is_backing_chain_frozen(BlockDriverState *bs, BlockDriverState *base,
BlockDriverState *i;
BdrvChild *child;
GLOBAL_STATE_CODE();
for (i = bs; i != base; i = child_bs(child)) {
child = bdrv_filter_or_cow_child(i);
@ -5446,6 +5506,8 @@ int bdrv_freeze_backing_chain(BlockDriverState *bs, BlockDriverState *base,
BlockDriverState *i;
BdrvChild *child;
GLOBAL_STATE_CODE();
if (bdrv_is_backing_chain_frozen(bs, base, errp)) {
return -EPERM;
}
@ -5480,6 +5542,8 @@ void bdrv_unfreeze_backing_chain(BlockDriverState *bs, BlockDriverState *base)
BlockDriverState *i;
BdrvChild *child;
GLOBAL_STATE_CODE();
for (i = bs; i != base; i = child_bs(child)) {
child = bdrv_filter_or_cow_child(i);
if (child) {
@ -5529,6 +5593,8 @@ int bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base,
g_autoptr(GSList) updated_children = NULL;
GSList *p;
GLOBAL_STATE_CODE();
bdrv_ref(top);
bdrv_subtree_drained_begin(top);
@ -5788,6 +5854,8 @@ void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
int i;
const char **formats = NULL;
GLOBAL_STATE_CODE();
QLIST_FOREACH(drv, &bdrv_drivers, list) {
if (drv->format_name) {
bool found = false;
@ -5846,6 +5914,7 @@ BlockDriverState *bdrv_find_node(const char *node_name)
BlockDriverState *bs;
assert(node_name);
GLOBAL_STATE_CODE();
QTAILQ_FOREACH(bs, &graph_bdrv_states, node_list) {
if (!strcmp(node_name, bs->node_name)) {
@ -5862,6 +5931,8 @@ BlockDeviceInfoList *bdrv_named_nodes_list(bool flat,
BlockDeviceInfoList *list;
BlockDriverState *bs;
GLOBAL_STATE_CODE();
list = NULL;
QTAILQ_FOREACH(bs, &graph_bdrv_states, node_list) {
BlockDeviceInfo *info = bdrv_block_device_info(NULL, bs, flat, errp);
@ -5967,6 +6038,8 @@ XDbgBlockGraph *bdrv_get_xdbg_block_graph(Error **errp)
BdrvChild *child;
XDbgBlockGraphConstructor *gr = xdbg_graph_new();
GLOBAL_STATE_CODE();
for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
char *allocated_name = NULL;
const char *name = blk_name(blk);
@ -6010,6 +6083,8 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
BlockBackend *blk;
BlockDriverState *bs;
GLOBAL_STATE_CODE();
if (device) {
blk = blk_by_name(device);
@ -6041,6 +6116,9 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
* return false. If either argument is NULL, return false. */
bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base)
{
GLOBAL_STATE_CODE();
while (top && top != base) {
top = bdrv_filter_or_cow_bs(top);
}
@ -6050,6 +6128,7 @@ bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base)
BlockDriverState *bdrv_next_node(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
if (!bs) {
return QTAILQ_FIRST(&graph_bdrv_states);
}
@ -6058,6 +6137,7 @@ BlockDriverState *bdrv_next_node(BlockDriverState *bs)
BlockDriverState *bdrv_next_all_states(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
if (!bs) {
return QTAILQ_FIRST(&all_bdrv_states);
}
@ -6104,17 +6184,20 @@ const char *bdrv_get_device_or_node_name(const BlockDriverState *bs)
int bdrv_get_flags(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
return bs->open_flags;
}
int bdrv_has_zero_init_1(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
return 1;
}
int bdrv_has_zero_init(BlockDriverState *bs)
{
BlockDriverState *filtered;
GLOBAL_STATE_CODE();
if (!bs->drv) {
return 0;
@ -6226,6 +6309,7 @@ static BlockDriverState *bdrv_find_debug_node(BlockDriverState *bs)
int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
const char *tag)
{
GLOBAL_STATE_CODE();
bs = bdrv_find_debug_node(bs);
if (bs) {
return bs->drv->bdrv_debug_breakpoint(bs, event, tag);
@ -6236,6 +6320,7 @@ int bdrv_debug_breakpoint(BlockDriverState *bs, const char *event,
int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
{
GLOBAL_STATE_CODE();
bs = bdrv_find_debug_node(bs);
if (bs) {
return bs->drv->bdrv_debug_remove_breakpoint(bs, tag);
@ -6246,6 +6331,7 @@ int bdrv_debug_remove_breakpoint(BlockDriverState *bs, const char *tag)
int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
{
GLOBAL_STATE_CODE();
while (bs && (!bs->drv || !bs->drv->bdrv_debug_resume)) {
bs = bdrv_primary_bs(bs);
}
@ -6259,6 +6345,7 @@ int bdrv_debug_resume(BlockDriverState *bs, const char *tag)
bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag)
{
GLOBAL_STATE_CODE();
while (bs && bs->drv && !bs->drv->bdrv_debug_is_suspended) {
bs = bdrv_primary_bs(bs);
}
@ -6286,6 +6373,8 @@ BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
BlockDriverState *retval = NULL;
BlockDriverState *bs_below;
GLOBAL_STATE_CODE();
if (!bs || !bs->drv || !backing_file) {
return NULL;
}
@ -6403,6 +6492,8 @@ int bdrv_activate(BlockDriverState *bs, Error **errp)
int ret;
BdrvDirtyBitmap *bm;
GLOBAL_STATE_CODE();
if (!bs->drv) {
return -ENOMEDIUM;
}
@ -6490,6 +6581,8 @@ void bdrv_activate_all(Error **errp)
BlockDriverState *bs;
BdrvNextIterator it;
GLOBAL_STATE_CODE();
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
int ret;
@ -6589,6 +6682,8 @@ int bdrv_inactivate_all(void)
int ret = 0;
GSList *aio_ctxs = NULL, *ctx;
GLOBAL_STATE_CODE();
for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
AioContext *aio_context = bdrv_get_aio_context(bs);
@ -6677,6 +6772,7 @@ void bdrv_lock_medium(BlockDriverState *bs, bool locked)
/* Get a reference to bs */
void bdrv_ref(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
bs->refcnt++;
}
@ -6685,6 +6781,7 @@ void bdrv_ref(BlockDriverState *bs)
* deleted. */
void bdrv_unref(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
if (!bs) {
return;
}
@ -6702,6 +6799,7 @@ struct BdrvOpBlocker {
bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp)
{
BdrvOpBlocker *blocker;
GLOBAL_STATE_CODE();
assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX);
if (!QLIST_EMPTY(&bs->op_blockers[op])) {
blocker = QLIST_FIRST(&bs->op_blockers[op]);
@ -6716,6 +6814,7 @@ bool bdrv_op_is_blocked(BlockDriverState *bs, BlockOpType op, Error **errp)
void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason)
{
BdrvOpBlocker *blocker;
GLOBAL_STATE_CODE();
assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX);
blocker = g_new0(BdrvOpBlocker, 1);
@ -6726,6 +6825,7 @@ void bdrv_op_block(BlockDriverState *bs, BlockOpType op, Error *reason)
void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason)
{
BdrvOpBlocker *blocker, *next;
GLOBAL_STATE_CODE();
assert((int) op >= 0 && op < BLOCK_OP_TYPE_MAX);
QLIST_FOREACH_SAFE(blocker, &bs->op_blockers[op], list, next) {
if (blocker->reason == reason) {
@ -6738,6 +6838,7 @@ void bdrv_op_unblock(BlockDriverState *bs, BlockOpType op, Error *reason)
void bdrv_op_block_all(BlockDriverState *bs, Error *reason)
{
int i;
GLOBAL_STATE_CODE();
for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) {
bdrv_op_block(bs, i, reason);
}
@ -6746,6 +6847,7 @@ void bdrv_op_block_all(BlockDriverState *bs, Error *reason)
void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason)
{
int i;
GLOBAL_STATE_CODE();
for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) {
bdrv_op_unblock(bs, i, reason);
}
@ -6754,7 +6856,7 @@ void bdrv_op_unblock_all(BlockDriverState *bs, Error *reason)
bool bdrv_op_blocker_is_empty(BlockDriverState *bs)
{
int i;
GLOBAL_STATE_CODE();
for (i = 0; i < BLOCK_OP_TYPE_MAX; i++) {
if (!QLIST_EMPTY(&bs->op_blockers[i])) {
return false;
@ -6776,6 +6878,8 @@ void bdrv_img_create(const char *filename, const char *fmt,
Error *local_err = NULL;
int ret = 0;
GLOBAL_STATE_CODE();
/* Find driver and parse its options */
drv = bdrv_find_format(fmt);
if (!drv) {
@ -7192,6 +7296,7 @@ static bool bdrv_parent_can_set_aio_context(BdrvChild *c, AioContext *ctx,
bool bdrv_child_can_set_aio_context(BdrvChild *c, AioContext *ctx,
GSList **ignore, Error **errp)
{
GLOBAL_STATE_CODE();
if (g_slist_find(*ignore, c)) {
return true;
}
@ -7210,6 +7315,8 @@ bool bdrv_can_set_aio_context(BlockDriverState *bs, AioContext *ctx,
return true;
}
GLOBAL_STATE_CODE();
QLIST_FOREACH(c, &bs->parents, next_parent) {
if (!bdrv_parent_can_set_aio_context(c, ctx, ignore, errp)) {
return false;
@ -7230,6 +7337,8 @@ int bdrv_child_try_set_aio_context(BlockDriverState *bs, AioContext *ctx,
GSList *ignore;
bool ret;
GLOBAL_STATE_CODE();
ignore = ignore_child ? g_slist_prepend(NULL, ignore_child) : NULL;
ret = bdrv_can_set_aio_context(bs, ctx, &ignore, errp);
g_slist_free(ignore);
@ -7248,6 +7357,7 @@ int bdrv_child_try_set_aio_context(BlockDriverState *bs, AioContext *ctx,
int bdrv_try_set_aio_context(BlockDriverState *bs, AioContext *ctx,
Error **errp)
{
GLOBAL_STATE_CODE();
return bdrv_child_try_set_aio_context(bs, ctx, NULL, errp);
}
@ -7261,6 +7371,7 @@ void bdrv_add_aio_context_notifier(BlockDriverState *bs,
.detach_aio_context = detach_aio_context,
.opaque = opaque
};
GLOBAL_STATE_CODE();
QLIST_INSERT_HEAD(&bs->aio_notifiers, ban, list);
}
@ -7272,6 +7383,7 @@ void bdrv_remove_aio_context_notifier(BlockDriverState *bs,
void *opaque)
{
BdrvAioNotifier *ban, *ban_next;
GLOBAL_STATE_CODE();
QLIST_FOREACH_SAFE(ban, &bs->aio_notifiers, list, ban_next) {
if (ban->attached_aio_context == attached_aio_context &&
@ -7296,6 +7408,7 @@ int bdrv_amend_options(BlockDriverState *bs, QemuOpts *opts,
bool force,
Error **errp)
{
GLOBAL_STATE_CODE();
if (!bs->drv) {
error_setg(errp, "Node is ejected");
return -ENOMEDIUM;
@ -7366,6 +7479,8 @@ BlockDriverState *check_to_replace_node(BlockDriverState *parent_bs,
BlockDriverState *to_replace_bs = bdrv_find_node(node_name);
AioContext *aio_context;
GLOBAL_STATE_CODE();
if (!to_replace_bs) {
error_setg(errp, "Failed to find node with node-name='%s'", node_name);
return NULL;
@ -7527,6 +7642,8 @@ void bdrv_refresh_filename(BlockDriverState *bs)
bool generate_json_filename; /* Whether our default implementation should
fill exact_filename (false) or not (true) */
GLOBAL_STATE_CODE();
if (!drv) {
return;
}
@ -7649,6 +7766,8 @@ char *bdrv_dirname(BlockDriverState *bs, Error **errp)
BlockDriver *drv = bs->drv;
BlockDriverState *child_bs;
GLOBAL_STATE_CODE();
if (!drv) {
error_setg(errp, "Node '%s' is ejected", bs->node_name);
return NULL;
@ -7680,7 +7799,7 @@ char *bdrv_dirname(BlockDriverState *bs, Error **errp)
void bdrv_add_child(BlockDriverState *parent_bs, BlockDriverState *child_bs,
Error **errp)
{
GLOBAL_STATE_CODE();
if (!parent_bs->drv || !parent_bs->drv->bdrv_add_child) {
error_setg(errp, "The node %s does not support adding a child",
bdrv_get_device_or_node_name(parent_bs));
@ -7700,6 +7819,7 @@ void bdrv_del_child(BlockDriverState *parent_bs, BdrvChild *child, Error **errp)
{
BdrvChild *tmp;
GLOBAL_STATE_CODE();
if (!parent_bs->drv || !parent_bs->drv->bdrv_del_child) {
error_setg(errp, "The node %s does not support removing a child",
bdrv_get_device_or_node_name(parent_bs));
@ -7727,6 +7847,7 @@ int bdrv_make_empty(BdrvChild *c, Error **errp)
BlockDriver *drv = c->bs->drv;
int ret;
GLOBAL_STATE_CODE();
assert(c->perm & (BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED));
if (!drv->bdrv_make_empty) {

2
block/commit.c
View File

@ -432,6 +432,8 @@ int bdrv_commit(BlockDriverState *bs)
QEMU_AUTO_VFREE uint8_t *buf = NULL;
Error *local_err = NULL;
GLOBAL_STATE_CODE();
if (!drv)
return -ENOMEDIUM;

11
block/io.c
View File

@ -164,6 +164,8 @@ void bdrv_refresh_limits(BlockDriverState *bs, Transaction *tran, Error **errp)
BdrvChild *c;
bool have_limits;
GLOBAL_STATE_CODE();
if (tran) {
BdrvRefreshLimitsState *s = g_new(BdrvRefreshLimitsState, 1);
*s = (BdrvRefreshLimitsState) {
@ -612,6 +614,7 @@ static bool bdrv_drain_all_poll(void)
{
BlockDriverState *bs = NULL;
bool result = false;
GLOBAL_STATE_CODE();
/* bdrv_drain_poll() can't make changes to the graph and we are holding the
* main AioContext lock, so iterating bdrv_next_all_states() is safe. */
@ -640,6 +643,7 @@ static bool bdrv_drain_all_poll(void)
void bdrv_drain_all_begin(void)
{
BlockDriverState *bs = NULL;
GLOBAL_STATE_CODE();
if (qemu_in_coroutine()) {
bdrv_co_yield_to_drain(NULL, true, false, NULL, true, true, NULL);
@ -696,6 +700,7 @@ void bdrv_drain_all_end(void)
{
BlockDriverState *bs = NULL;
int drained_end_counter = 0;
GLOBAL_STATE_CODE();
/*
* bdrv queue is managed by record/replay,
@ -723,6 +728,7 @@ void bdrv_drain_all_end(void)
void bdrv_drain_all(void)
{
GLOBAL_STATE_CODE();
bdrv_drain_all_begin();
bdrv_drain_all_end();
}
@ -2345,6 +2351,8 @@ int bdrv_flush_all(void)
BlockDriverState *bs = NULL;
int result = 0;
GLOBAL_STATE_CODE();
/*
* bdrv queue is managed by record/replay,
* creating new flush request for stopping
@ -3296,6 +3304,7 @@ void bdrv_register_buf(BlockDriverState *bs, void *host, size_t size)
{
BdrvChild *child;
GLOBAL_STATE_CODE();
if (bs->drv && bs->drv->bdrv_register_buf) {
bs->drv->bdrv_register_buf(bs, host, size);
}
@ -3308,6 +3317,7 @@ void bdrv_unregister_buf(BlockDriverState *bs, void *host)
{
BdrvChild *child;
GLOBAL_STATE_CODE();
if (bs->drv && bs->drv->bdrv_unregister_buf) {
bs->drv->bdrv_unregister_buf(bs, host);
}
@ -3579,6 +3589,7 @@ out:
void bdrv_cancel_in_flight(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
if (!bs || !bs->drv) {
return;
}

1
blockdev.c
View File

@ -658,6 +658,7 @@ void blockdev_close_all_bdrv_states(void)
/* Iterates over the list of monitor-owned BlockDriverStates */
BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
{
GLOBAL_STATE_CODE();
return bs ? QTAILQ_NEXT(bs, monitor_list)
: QTAILQ_FIRST(&monitor_bdrv_states);
}