* Ignore default drives, because we create certain default
* drives unconditionally, then leave them unclaimed. Not the
* users fault.
- * Ignore IF_VIRTIO, because it gets desugared into -device,
- * so we can leave failing to -device.
+ * Ignore IF_VIRTIO or IF_XEN, because it gets desugared into
+ * -device, so we can leave failing to -device.
* Ignore IF_NONE, because leaving unclaimed IF_NONE remains
* available for device_add is a feature.
*/
if (dinfo->is_default || dinfo->type == IF_VIRTIO
- || dinfo->type == IF_NONE) {
+ || dinfo->type == IF_XEN || dinfo->type == IF_NONE) {
continue;
}
if (!blk_get_attached_dev(blk)) {
switch (qobject_type(entry->value)) {
case QTYPE_QSTRING: {
- unsigned long long length;
+ uint64_t length;
const char *str = qstring_get_str(qobject_to(QString,
entry->value));
- if (parse_uint_full(str, &length, 10) == 0 &&
+ if (parse_uint_full(str, 10, &length) == 0 &&
length > 0 && length <= UINT_MAX) {
block_acct_add_interval(stats, (unsigned) length);
} else {
/* Takes the ownership of bs_opts */
BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
{
+ BlockDriverState *bs;
int bdrv_flags = 0;
GLOBAL_STATE_CODE();
bdrv_flags |= BDRV_O_INACTIVE;
}
- return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
+ aio_context_acquire(qemu_get_aio_context());
+ bs = bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
+ aio_context_release(qemu_get_aio_context());
+
+ return bs;
}
void blockdev_close_all_bdrv_states(void)
qemu_opt_set(devopts, "driver", "virtio-blk", &error_abort);
qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
&error_abort);
+ } else if (type == IF_XEN) {
+ QemuOpts *devopts;
+ devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
+ &error_abort);
+ qemu_opt_set(devopts, "driver",
+ (media == MEDIA_CDROM) ? "xen-cdrom" : "xen-disk",
+ &error_abort);
+ qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
+ &error_abort);
}
filename = qemu_opt_get(legacy_opts, "file");
BlockDriverState *bs;
AioContext *aio_context;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_lookup_bs(name, name, errp);
if (bs == NULL) {
return NULL;
SnapshotInfo *info = NULL;
int ret;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = qmp_get_root_bs(device, errp);
if (!bs) {
return NULL;
return NULL;
}
-/* New and old BlockDriverState structs for atomic group operations */
-
-typedef struct BlkActionState BlkActionState;
-
-/**
- * BlkActionOps:
- * Table of operations that define an Action.
- *
- * @instance_size: Size of state struct, in bytes.
- * @prepare: Prepare the work, must NOT be NULL.
- * @commit: Commit the changes, can be NULL.
- * @abort: Abort the changes on fail, can be NULL.
- * @clean: Clean up resources after all transaction actions have called
- * commit() or abort(). Can be NULL.
- *
- * Only prepare() may fail. In a single transaction, only one of commit() or
- * abort() will be called. clean() will always be called if it is present.
- *
- * Always run under BQL.
- */
-typedef struct BlkActionOps {
- size_t instance_size;
- void (*action)(BlkActionState *common, Transaction *tran, Error **errp);
-} BlkActionOps;
-
-/**
- * BlkActionState:
- * Describes one Action's state within a Transaction.
- *
- * @action: QAPI-defined enum identifying which Action to perform.
- * @ops: Table of ActionOps this Action can perform.
- * @block_job_txn: Transaction which this action belongs to.
- * @entry: List membership for all Actions in this Transaction.
- *
- * This structure must be arranged as first member in a subclassed type,
- * assuming that the compiler will also arrange it to the same offsets as the
- * base class.
- */
-struct BlkActionState {
- TransactionAction *action;
- const BlkActionOps *ops;
- JobTxn *block_job_txn;
- QTAILQ_ENTRY(BlkActionState) entry;
-};
-
/* internal snapshot private data */
typedef struct InternalSnapshotState {
- BlkActionState common;
BlockDriverState *bs;
QEMUSnapshotInfo sn;
bool created;
.clean = internal_snapshot_clean,
};
-static void internal_snapshot_action(BlkActionState *common,
+static void internal_snapshot_action(BlockdevSnapshotInternal *internal,
Transaction *tran, Error **errp)
{
Error *local_err = NULL;
QEMUSnapshotInfo old_sn, *sn;
bool ret;
int64_t rt;
- BlockdevSnapshotInternal *internal;
- InternalSnapshotState *state;
+ InternalSnapshotState *state = g_new0(InternalSnapshotState, 1);
AioContext *aio_context;
int ret1;
- g_assert(common->action->type ==
- TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
- internal = common->action->u.blockdev_snapshot_internal_sync.data;
- state = DO_UPCAST(InternalSnapshotState, common, common);
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
tran_add(tran, &internal_snapshot_drv, state);
AioContext *aio_context;
Error *local_error = NULL;
+ GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!state->created) {
return;
}
/* external snapshot private data */
typedef struct ExternalSnapshotState {
- BlkActionState common;
BlockDriverState *old_bs;
BlockDriverState *new_bs;
bool overlay_appended;
.clean = external_snapshot_clean,
};
-static void external_snapshot_action(BlkActionState *common, Transaction *tran,
- Error **errp)
+static void external_snapshot_action(TransactionAction *action,
+ Transaction *tran, Error **errp)
{
int ret;
int flags = 0;
const char *snapshot_ref;
/* File name of the new image (for 'blockdev-snapshot-sync') */
const char *new_image_file;
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
- TransactionAction *action = common->action;
+ ExternalSnapshotState *state = g_new0(ExternalSnapshotState, 1);
AioContext *aio_context;
uint64_t perm, shared;
+ /* TODO We'll eventually have to take a writer lock in this function */
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
tran_add(tran, &external_snapshot_drv, state);
/* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
}
qdict_put_str(options, "driver", format);
}
+ aio_context_release(aio_context);
+ aio_context_acquire(qemu_get_aio_context());
state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
errp);
+ aio_context_release(qemu_get_aio_context());
+
/* We will manually add the backing_hd field to the bs later */
if (!state->new_bs) {
- goto out;
+ return;
}
+ aio_context_acquire(aio_context);
+
/*
* Allow attaching a backing file to an overlay that's already in use only
* if the parents don't assume that they are already seeing a valid image.
aio_context_acquire(aio_context);
}
+ bdrv_drained_begin(state->new_bs);
+ bdrv_graph_wrlock(state->old_bs);
bdrv_replace_node(state->new_bs, state->old_bs, &error_abort);
+ bdrv_graph_wrunlock(state->old_bs);
+ bdrv_drained_end(state->new_bs);
+
bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */
aio_context_release(aio_context);
}
typedef struct DriveBackupState {
- BlkActionState common;
BlockDriverState *bs;
BlockJob *job;
} DriveBackupState;
.clean = drive_backup_clean,
};
-static void drive_backup_action(BlkActionState *common, Transaction *tran,
- Error **errp)
+static void drive_backup_action(DriveBackup *backup,
+ JobTxn *block_job_txn,
+ Transaction *tran, Error **errp)
{
- DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
- DriveBackup *backup;
+ DriveBackupState *state = g_new0(DriveBackupState, 1);
BlockDriverState *bs;
BlockDriverState *target_bs;
BlockDriverState *source = NULL;
bool set_backing_hd = false;
int ret;
- tran_add(tran, &drive_backup_drv, state);
+ GLOBAL_STATE_CODE();
- assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
- backup = common->action->u.drive_backup.data;
+ tran_add(tran, &drive_backup_drv, state);
if (!backup->has_mode) {
backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
/* Early check to avoid creating target */
+ bdrv_graph_rdlock_main_loop();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
+ bdrv_graph_rdunlock_main_loop();
goto out;
}
flags |= BDRV_O_NO_BACKING;
set_backing_hd = true;
}
+ bdrv_graph_rdunlock_main_loop();
size = bdrv_getlength(bs);
if (size < 0) {
assert(format);
if (source) {
/* Implicit filters should not appear in the filename */
- BlockDriverState *explicit_backing =
- bdrv_skip_implicit_filters(source);
+ BlockDriverState *explicit_backing;
+ bdrv_graph_rdlock_main_loop();
+ explicit_backing = bdrv_skip_implicit_filters(source);
bdrv_refresh_filename(explicit_backing);
+ bdrv_graph_rdunlock_main_loop();
+
bdrv_img_create(backup->target, format,
explicit_backing->filename,
explicit_backing->drv->format_name, NULL,
if (format) {
qdict_put_str(options, "driver", format);
}
+ aio_context_release(aio_context);
+ aio_context_acquire(qemu_get_aio_context());
target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
+ aio_context_release(qemu_get_aio_context());
+
if (!target_bs) {
- goto out;
+ return;
}
/* Honor bdrv_try_change_aio_context() context acquisition requirements. */
old_context = bdrv_get_aio_context(target_bs);
- aio_context_release(aio_context);
aio_context_acquire(old_context);
ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
state->job = do_backup_common(qapi_DriveBackup_base(backup),
bs, target_bs, aio_context,
- common->block_job_txn, errp);
+ block_job_txn, errp);
unref:
bdrv_unref(target_bs);
}
typedef struct BlockdevBackupState {
- BlkActionState common;
BlockDriverState *bs;
BlockJob *job;
} BlockdevBackupState;
.clean = blockdev_backup_clean,
};
-static void blockdev_backup_action(BlkActionState *common, Transaction *tran,
- Error **errp)
+static void blockdev_backup_action(BlockdevBackup *backup,
+ JobTxn *block_job_txn,
+ Transaction *tran, Error **errp)
{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
- BlockdevBackup *backup;
+ BlockdevBackupState *state = g_new0(BlockdevBackupState, 1);
BlockDriverState *bs;
BlockDriverState *target_bs;
AioContext *aio_context;
tran_add(tran, &blockdev_backup_drv, state);
- assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
- backup = common->action->u.blockdev_backup.data;
-
bs = bdrv_lookup_bs(backup->device, backup->device, errp);
if (!bs) {
return;
state->job = do_backup_common(qapi_BlockdevBackup_base(backup),
bs, target_bs, aio_context,
- common->block_job_txn, errp);
+ block_job_txn, errp);
aio_context_release(aio_context);
}
}
typedef struct BlockDirtyBitmapState {
- BlkActionState common;
BdrvDirtyBitmap *bitmap;
BlockDriverState *bs;
HBitmap *backup;
- bool prepared;
bool was_enabled;
} BlockDirtyBitmapState;
.clean = g_free,
};
-static void block_dirty_bitmap_add_action(BlkActionState *common,
+static void block_dirty_bitmap_add_action(BlockDirtyBitmapAdd *action,
Transaction *tran, Error **errp)
{
Error *local_err = NULL;
- BlockDirtyBitmapAdd *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
tran_add(tran, &block_dirty_bitmap_add_drv, state);
- action = common->action->u.block_dirty_bitmap_add.data;
/* AIO context taken and released within qmp_block_dirty_bitmap_add */
qmp_block_dirty_bitmap_add(action->node, action->name,
action->has_granularity, action->granularity,
&local_err);
if (!local_err) {
- state->prepared = true;
+ state->bitmap = block_dirty_bitmap_lookup(action->node, action->name,
+ NULL, &error_abort);
} else {
error_propagate(errp, local_err);
}
static void block_dirty_bitmap_add_abort(void *opaque)
{
- BlockDirtyBitmapAdd *action;
BlockDirtyBitmapState *state = opaque;
- action = state->common.action->u.block_dirty_bitmap_add.data;
- /* Should not be able to fail: IF the bitmap was added via .prepare(),
- * then the node reference and bitmap name must have been valid.
- */
- if (state->prepared) {
- qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
+ if (state->bitmap) {
+ bdrv_release_dirty_bitmap(state->bitmap);
}
}
.clean = g_free,
};
-static void block_dirty_bitmap_clear_action(BlkActionState *common,
+static void block_dirty_bitmap_clear_action(BlockDirtyBitmap *action,
Transaction *tran, Error **errp)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
- BlockDirtyBitmap *action;
+ BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
tran_add(tran, &block_dirty_bitmap_clear_drv, state);
- action = common->action->u.block_dirty_bitmap_clear.data;
state->bitmap = block_dirty_bitmap_lookup(action->node,
action->name,
&state->bs,
.clean = g_free,
};
-static void block_dirty_bitmap_enable_action(BlkActionState *common,
+static void block_dirty_bitmap_enable_action(BlockDirtyBitmap *action,
Transaction *tran, Error **errp)
{
- BlockDirtyBitmap *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
tran_add(tran, &block_dirty_bitmap_enable_drv, state);
- action = common->action->u.block_dirty_bitmap_enable.data;
state->bitmap = block_dirty_bitmap_lookup(action->node,
action->name,
NULL,
.clean = g_free,
};
-static void block_dirty_bitmap_disable_action(BlkActionState *common,
+static void block_dirty_bitmap_disable_action(BlockDirtyBitmap *action,
Transaction *tran, Error **errp)
{
- BlockDirtyBitmap *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
tran_add(tran, &block_dirty_bitmap_disable_drv, state);
- action = common->action->u.block_dirty_bitmap_disable.data;
state->bitmap = block_dirty_bitmap_lookup(action->node,
action->name,
NULL,
.clean = g_free,
};
-static void block_dirty_bitmap_merge_action(BlkActionState *common,
+static void block_dirty_bitmap_merge_action(BlockDirtyBitmapMerge *action,
Transaction *tran, Error **errp)
{
- BlockDirtyBitmapMerge *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
tran_add(tran, &block_dirty_bitmap_merge_drv, state);
- action = common->action->u.block_dirty_bitmap_merge.data;
-
state->bitmap = block_dirty_bitmap_merge(action->node, action->target,
action->bitmaps, &state->backup,
errp);
.clean = g_free,
};
-static void block_dirty_bitmap_remove_action(BlkActionState *common,
+static void block_dirty_bitmap_remove_action(BlockDirtyBitmap *action,
Transaction *tran, Error **errp)
{
- BlockDirtyBitmap *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
tran_add(tran, &block_dirty_bitmap_remove_drv, state);
- action = common->action->u.block_dirty_bitmap_remove.data;
state->bitmap = block_dirty_bitmap_remove(action->node, action->name,
false, &state->bs, errp);
static void abort_commit(void *opaque);
TransactionActionDrv abort_drv = {
.commit = abort_commit,
- .clean = g_free,
};
-static void abort_action(BlkActionState *common, Transaction *tran,
- Error **errp)
+static void abort_action(Transaction *tran, Error **errp)
{
- tran_add(tran, &abort_drv, common);
+ tran_add(tran, &abort_drv, NULL);
error_setg(errp, "Transaction aborted using Abort action");
}
g_assert_not_reached(); /* this action never succeeds */
}
-static const BlkActionOps actions_map[] = {
- [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
- .instance_size = sizeof(ExternalSnapshotState),
- .action = external_snapshot_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
- .instance_size = sizeof(ExternalSnapshotState),
- .action = external_snapshot_action,
- },
- [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
- .instance_size = sizeof(DriveBackupState),
- .action = drive_backup_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
- .instance_size = sizeof(BlockdevBackupState),
- .action = blockdev_backup_action,
- },
- [TRANSACTION_ACTION_KIND_ABORT] = {
- .instance_size = sizeof(BlkActionState),
- .action = abort_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
- .instance_size = sizeof(InternalSnapshotState),
- .action = internal_snapshot_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .action = block_dirty_bitmap_add_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .action = block_dirty_bitmap_clear_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .action = block_dirty_bitmap_enable_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .action = block_dirty_bitmap_disable_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .action = block_dirty_bitmap_merge_action,
- },
- [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] = {
- .instance_size = sizeof(BlockDirtyBitmapState),
- .action = block_dirty_bitmap_remove_action,
- },
- /* Where are transactions for MIRROR, COMMIT and STREAM?
+static void transaction_action(TransactionAction *act, JobTxn *block_job_txn,
+ Transaction *tran, Error **errp)
+{
+ switch (act->type) {
+ case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
+ case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
+ external_snapshot_action(act, tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_DRIVE_BACKUP:
+ drive_backup_action(act->u.drive_backup.data,
+ block_job_txn, tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP:
+ blockdev_backup_action(act->u.blockdev_backup.data,
+ block_job_txn, tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_ABORT:
+ abort_action(tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC:
+ internal_snapshot_action(act->u.blockdev_snapshot_internal_sync.data,
+ tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD:
+ block_dirty_bitmap_add_action(act->u.block_dirty_bitmap_add.data,
+ tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR:
+ block_dirty_bitmap_clear_action(act->u.block_dirty_bitmap_clear.data,
+ tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE:
+ block_dirty_bitmap_enable_action(act->u.block_dirty_bitmap_enable.data,
+ tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE:
+ block_dirty_bitmap_disable_action(
+ act->u.block_dirty_bitmap_disable.data, tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE:
+ block_dirty_bitmap_merge_action(act->u.block_dirty_bitmap_merge.data,
+ tran, errp);
+ return;
+ case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE:
+ block_dirty_bitmap_remove_action(act->u.block_dirty_bitmap_remove.data,
+ tran, errp);
+ return;
+ /*
+ * Where are transactions for MIRROR, COMMIT and STREAM?
* Although these blockjobs use transaction callbacks like the backup job,
* these jobs do not necessarily adhere to transaction semantics.
* These jobs may not fully undo all of their actions on abort, nor do they
* necessarily work in transactions with more than one job in them.
*/
-};
+ case TRANSACTION_ACTION_KIND__MAX:
+ default:
+ g_assert_not_reached();
+ };
+}
+
/*
* 'Atomic' group operations. The operations are performed as a set, and if
/* We don't do anything in this loop that commits us to the operations */
for (act = actions; act; act = act->next) {
- TransactionAction *dev_info = act->value;
- const BlkActionOps *ops;
- BlkActionState *state;
-
- assert(dev_info->type < ARRAY_SIZE(actions_map));
-
- ops = &actions_map[dev_info->type];
- assert(ops->instance_size > 0);
-
- state = g_malloc0(ops->instance_size);
- state->ops = ops;
- state->action = dev_info;
- state->block_job_txn = block_job_txn;
-
- state->ops->action(state, tran, &local_err);
+ transaction_action(act->value, block_job_txn, tran, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto delete_and_fail;
return;
}
+ bdrv_graph_co_rdlock();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
error_setg(errp, QERR_DEVICE_IN_USE, device);
+ bdrv_graph_co_rdunlock();
return;
}
+ bdrv_graph_co_rdunlock();
blk = blk_co_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp);
if (!blk) {
Error *local_err = NULL;
int job_flags = JOB_DEFAULT;
+ GLOBAL_STATE_CODE();
+
if (base && base_node) {
error_setg(errp, "'base' and 'base-node' cannot be specified "
"at the same time");
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
+ bdrv_graph_rdlock_main_loop();
if (base) {
base_bs = bdrv_find_backing_image(bs, base);
if (base_bs == NULL) {
error_setg(errp, "Can't find '%s' in the backing chain", base);
- goto out;
+ goto out_rdlock;
}
assert(bdrv_get_aio_context(base_bs) == aio_context);
}
if (base_node) {
base_bs = bdrv_lookup_bs(NULL, base_node, errp);
if (!base_bs) {
- goto out;
+ goto out_rdlock;
}
if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
error_setg(errp, "Node '%s' is not a backing image of '%s'",
base_node, device);
- goto out;
+ goto out_rdlock;
}
assert(bdrv_get_aio_context(base_bs) == aio_context);
+
bdrv_refresh_filename(base_bs);
}
if (bottom) {
bottom_bs = bdrv_lookup_bs(NULL, bottom, errp);
if (!bottom_bs) {
- goto out;
+ goto out_rdlock;
}
if (!bottom_bs->drv) {
error_setg(errp, "Node '%s' is not open", bottom);
- goto out;
+ goto out_rdlock;
}
if (bottom_bs->drv->is_filter) {
error_setg(errp, "Node '%s' is a filter, use a non-filter node "
"as 'bottom'", bottom);
- goto out;
+ goto out_rdlock;
}
if (!bdrv_chain_contains(bs, bottom_bs)) {
error_setg(errp, "Node '%s' is not in a chain starting from '%s'",
bottom, device);
- goto out;
+ goto out_rdlock;
}
assert(bdrv_get_aio_context(bottom_bs) == aio_context);
}
iter = bdrv_filter_or_cow_bs(iter))
{
if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
- goto out;
+ goto out_rdlock;
}
}
+ bdrv_graph_rdunlock_main_loop();
/* if we are streaming the entire chain, the result will have no backing
* file, and specifying one is therefore an error */
out:
aio_context_release(aio_context);
+ return;
+
+out_rdlock:
+ bdrv_graph_rdunlock_main_loop();
+ aio_context_release(aio_context);
}
void qmp_block_commit(const char *job_id, const char *device,
int job_flags = JOB_DEFAULT;
uint64_t top_perm, top_shared;
+ /* TODO We'll eventually have to take a writer lock in this function */
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
if (!has_speed) {
speed = 0;
}
XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp)
{
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
return bdrv_get_xdbg_block_graph(errp);
}
if (replaces) {
BlockDriverState *to_replace_bs;
+ AioContext *aio_context;
AioContext *replace_aio_context;
int64_t bs_size, replace_size;
return;
}
+ aio_context = bdrv_get_aio_context(bs);
replace_aio_context = bdrv_get_aio_context(to_replace_bs);
- aio_context_acquire(replace_aio_context);
+ /*
+ * bdrv_getlength() is a co-wrapper and uses AIO_WAIT_WHILE. Be sure not
+ * to acquire the same AioContext twice.
+ */
+ if (replace_aio_context != aio_context) {
+ aio_context_acquire(replace_aio_context);
+ }
replace_size = bdrv_getlength(to_replace_bs);
- aio_context_release(replace_aio_context);
+ if (replace_aio_context != aio_context) {
+ aio_context_release(replace_aio_context);
+ }
if (replace_size < 0) {
error_setg_errno(errp, -replace_size,
}
/* Early check to avoid creating target */
+ bdrv_graph_rdlock_main_loop();
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
+ bdrv_graph_rdunlock_main_loop();
return;
}
if (arg->sync == MIRROR_SYNC_MODE_NONE) {
target_backing_bs = bs;
}
+ bdrv_graph_rdunlock_main_loop();
size = bdrv_getlength(bs);
if (size < 0) {
bdrv_img_create(arg->target, format,
NULL, NULL, NULL, size, flags, false, &local_err);
} else {
- /* Implicit filters should not appear in the filename */
- BlockDriverState *explicit_backing =
- bdrv_skip_implicit_filters(target_backing_bs);
+ BlockDriverState *explicit_backing;
switch (arg->mode) {
case NEW_IMAGE_MODE_EXISTING:
break;
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
- /* create new image with backing file */
+ /*
+ * Create new image with backing file.
+ * Implicit filters should not appear in the filename.
+ */
+ bdrv_graph_rdlock_main_loop();
+ explicit_backing = bdrv_skip_implicit_filters(target_backing_bs);
bdrv_refresh_filename(explicit_backing);
+ bdrv_graph_rdunlock_main_loop();
+
bdrv_img_create(arg->target, format,
explicit_backing->filename,
explicit_backing->drv->format_name,
if (format) {
qdict_put_str(options, "driver", format);
}
+ aio_context_release(aio_context);
/* Mirroring takes care of copy-on-write using the source's backing
* file.
*/
+ aio_context_acquire(qemu_get_aio_context());
target_bs = bdrv_open(arg->target, NULL, options, flags, errp);
+ aio_context_release(qemu_get_aio_context());
+
if (!target_bs) {
- goto out;
+ return;
}
+ bdrv_graph_rdlock_main_loop();
zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL &&
(arg->mode == NEW_IMAGE_MODE_EXISTING ||
!bdrv_has_zero_init(target_bs)));
+ bdrv_graph_rdunlock_main_loop();
/* Honor bdrv_try_change_aio_context() context acquisition requirements. */
old_context = bdrv_get_aio_context(target_bs);
- aio_context_release(aio_context);
aio_context_acquire(old_context);
ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
job_dismiss_locked(&job, errp);
}
+void qmp_block_job_change(BlockJobChangeOptions *opts, Error **errp)
+{
+ BlockJob *job;
+
+ JOB_LOCK_GUARD();
+ job = find_block_job_locked(opts->id, errp);
+
+ if (!job) {
+ return;
+ }
+
+ block_job_change_locked(job, opts, errp);
+}
+
void qmp_change_backing_file(const char *device,
const char *image_node_name,
const char *backing_file,
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
+ bdrv_graph_rdlock_main_loop();
+
image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- goto out;
+ goto out_rdlock;
}
if (!image_bs) {
error_setg(errp, "image file not found");
- goto out;
+ goto out_rdlock;
}
if (bdrv_find_base(image_bs) == image_bs) {
error_setg(errp, "not allowing backing file change on an image "
"without a backing file");
- goto out;
+ goto out_rdlock;
}
/* even though we are not necessarily operating on bs, we need it to
* determine if block ops are currently prohibited on the chain */
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
- goto out;
+ goto out_rdlock;
}
/* final sanity check */
if (!bdrv_chain_contains(bs, image_bs)) {
error_setg(errp, "'%s' and image file are not in the same chain",
device);
- goto out;
+ goto out_rdlock;
}
+ bdrv_graph_rdunlock_main_loop();
/* if not r/w, reopen to make r/w */
ro = bdrv_is_read_only(image_bs);
out:
aio_context_release(aio_context);
+ return;
+
+out_rdlock:
+ bdrv_graph_rdunlock_main_loop();
+ aio_context_release(aio_context);
}
void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
BlockDriverState *bs;
GLOBAL_STATE_CODE();
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
bs = bdrv_find_node(node_name);
if (!bs) {
aio_context_release(aio_context);
}
-static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
- const char *child_name)
+static BdrvChild * GRAPH_RDLOCK
+bdrv_find_child(BlockDriverState *parent_bs, const char *child_name)
{
BdrvChild *child;
BlockDriverState *parent_bs, *new_bs = NULL;
BdrvChild *p_child;
+ bdrv_graph_wrlock(NULL);
+
parent_bs = bdrv_lookup_bs(parent, parent, errp);
if (!parent_bs) {
- return;
+ goto out;
}
if (!child == !node) {
} else {
error_setg(errp, "Either child or node must be specified");
}
- return;
+ goto out;
}
if (child) {
if (!p_child) {
error_setg(errp, "Node '%s' does not have child '%s'",
parent, child);
- return;
+ goto out;
}
bdrv_del_child(parent_bs, p_child, errp);
}
new_bs = bdrv_find_node(node);
if (!new_bs) {
error_setg(errp, "Node '%s' not found", node);
- return;
+ goto out;
}
bdrv_add_child(parent_bs, new_bs, errp);
}
+
+out:
+ bdrv_graph_wrunlock(NULL);
}
BlockJobInfoList *qmp_query_block_jobs(Error **errp)
AioContext *new_context;
BlockDriverState *bs;
+ GRAPH_RDLOCK_GUARD_MAINLOOP();
+
bs = bdrv_find_node(node_name);
if (!bs) {
error_setg(errp, "Failed to find node with node-name='%s'", node_name);
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