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[PATCH v9 1/6] blockdev: refactor transaction to use Transaction API
|
From: |
Vladimir Sementsov-Ogievskiy |
|
Subject: |
[PATCH v9 1/6] blockdev: refactor transaction to use Transaction API |
|
Date: |
Wed, 10 May 2023 18:06:19 +0300 |
We are going to add more block-graph modifying transaction actions,
and block-graph modifying functions are already based on Transaction
API.
Next, we'll need to separately update permissions after several
graph-modifying actions, and this would be simple with help of
Transaction API.
So, now let's just transform what we have into new-style transaction
actions.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
blockdev.c | 309 ++++++++++++++++++++++++++++++-----------------------
1 file changed, 178 insertions(+), 131 deletions(-)
diff --git a/blockdev.c b/blockdev.c
index d7b5c18f0a..82e5b6905b 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1200,10 +1200,7 @@ typedef struct BlkActionState BlkActionState;
*/
typedef struct BlkActionOps {
size_t instance_size;
- void (*prepare)(BlkActionState *common, Error **errp);
- void (*commit)(BlkActionState *common);
- void (*abort)(BlkActionState *common);
- void (*clean)(BlkActionState *common);
+ void (*action)(BlkActionState *common, Transaction *tran, Error **errp);
} BlkActionOps;
/**
@@ -1235,6 +1232,12 @@ typedef struct InternalSnapshotState {
bool created;
} InternalSnapshotState;
+static void internal_snapshot_abort(void *opaque);
+static void internal_snapshot_clean(void *opaque);
+TransactionActionDrv internal_snapshot_drv = {
+ .abort = internal_snapshot_abort,
+ .clean = internal_snapshot_clean,
+};
static int action_check_completion_mode(BlkActionState *s, Error **errp)
{
@@ -1249,8 +1252,8 @@ static int action_check_completion_mode(BlkActionState
*s, Error **errp)
return 0;
}
-static void internal_snapshot_prepare(BlkActionState *common,
- Error **errp)
+static void internal_snapshot_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
Error *local_err = NULL;
const char *device;
@@ -1269,6 +1272,8 @@ static void internal_snapshot_prepare(BlkActionState
*common,
internal = common->action->u.blockdev_snapshot_internal_sync.data;
state = DO_UPCAST(InternalSnapshotState, common, common);
+ tran_add(tran, &internal_snapshot_drv, state);
+
/* 1. parse input */
device = internal->device;
name = internal->name;
@@ -1353,10 +1358,9 @@ out:
aio_context_release(aio_context);
}
-static void internal_snapshot_abort(BlkActionState *common)
+static void internal_snapshot_abort(void *opaque)
{
- InternalSnapshotState *state =
- DO_UPCAST(InternalSnapshotState, common, common);
+ InternalSnapshotState *state = opaque;
BlockDriverState *bs = state->bs;
QEMUSnapshotInfo *sn = &state->sn;
AioContext *aio_context;
@@ -1380,10 +1384,9 @@ static void internal_snapshot_abort(BlkActionState
*common)
aio_context_release(aio_context);
}
-static void internal_snapshot_clean(BlkActionState *common)
+static void internal_snapshot_clean(void *opaque)
{
- InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
- common, common);
+ g_autofree InternalSnapshotState *state = opaque;
AioContext *aio_context;
if (!state->bs) {
@@ -1406,8 +1409,17 @@ typedef struct ExternalSnapshotState {
bool overlay_appended;
} ExternalSnapshotState;
-static void external_snapshot_prepare(BlkActionState *common,
- Error **errp)
+static void external_snapshot_commit(void *opaque);
+static void external_snapshot_abort(void *opaque);
+static void external_snapshot_clean(void *opaque);
+TransactionActionDrv external_snapshot_drv = {
+ .commit = external_snapshot_commit,
+ .abort = external_snapshot_abort,
+ .clean = external_snapshot_clean,
+};
+
+static void external_snapshot_action(BlkActionState *common, Transaction *tran,
+ Error **errp)
{
int ret;
int flags = 0;
@@ -1426,6 +1438,8 @@ static void external_snapshot_prepare(BlkActionState
*common,
AioContext *aio_context;
uint64_t perm, shared;
+ tran_add(tran, &external_snapshot_drv, state);
+
/* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
* purpose but a different set of parameters */
switch (action->type) {
@@ -1578,10 +1592,9 @@ out:
aio_context_release(aio_context);
}
-static void external_snapshot_commit(BlkActionState *common)
+static void external_snapshot_commit(void *opaque)
{
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
+ ExternalSnapshotState *state = opaque;
AioContext *aio_context;
aio_context = bdrv_get_aio_context(state->old_bs);
@@ -1597,10 +1610,9 @@ static void external_snapshot_commit(BlkActionState
*common)
aio_context_release(aio_context);
}
-static void external_snapshot_abort(BlkActionState *common)
+static void external_snapshot_abort(void *opaque)
{
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
+ ExternalSnapshotState *state = opaque;
if (state->new_bs) {
if (state->overlay_appended) {
AioContext *aio_context;
@@ -1640,10 +1652,9 @@ static void external_snapshot_abort(BlkActionState
*common)
}
}
-static void external_snapshot_clean(BlkActionState *common)
+static void external_snapshot_clean(void *opaque)
{
- ExternalSnapshotState *state =
- DO_UPCAST(ExternalSnapshotState, common, common);
+ g_autofree ExternalSnapshotState *state = opaque;
AioContext *aio_context;
if (!state->old_bs) {
@@ -1671,7 +1682,17 @@ static BlockJob *do_backup_common(BackupCommon *backup,
AioContext *aio_context,
JobTxn *txn, Error **errp);
-static void drive_backup_prepare(BlkActionState *common, Error **errp)
+static void drive_backup_commit(void *opaque);
+static void drive_backup_abort(void *opaque);
+static void drive_backup_clean(void *opaque);
+TransactionActionDrv drive_backup_drv = {
+ .commit = drive_backup_commit,
+ .abort = drive_backup_abort,
+ .clean = drive_backup_clean,
+};
+
+static void drive_backup_action(BlkActionState *common, Transaction *tran,
+ Error **errp)
{
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
DriveBackup *backup;
@@ -1688,6 +1709,8 @@ static void drive_backup_prepare(BlkActionState *common,
Error **errp)
bool set_backing_hd = false;
int ret;
+ tran_add(tran, &drive_backup_drv, state);
+
assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
backup = common->action->u.drive_backup.data;
@@ -1818,9 +1841,9 @@ out:
aio_context_release(aio_context);
}
-static void drive_backup_commit(BlkActionState *common)
+static void drive_backup_commit(void *opaque)
{
- DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+ DriveBackupState *state = opaque;
AioContext *aio_context;
aio_context = bdrv_get_aio_context(state->bs);
@@ -1832,18 +1855,18 @@ static void drive_backup_commit(BlkActionState *common)
aio_context_release(aio_context);
}
-static void drive_backup_abort(BlkActionState *common)
+static void drive_backup_abort(void *opaque)
{
- DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+ DriveBackupState *state = opaque;
if (state->job) {
job_cancel_sync(&state->job->job, true);
}
}
-static void drive_backup_clean(BlkActionState *common)
+static void drive_backup_clean(void *opaque)
{
- DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+ g_autofree DriveBackupState *state = opaque;
AioContext *aio_context;
if (!state->bs) {
@@ -1864,7 +1887,17 @@ typedef struct BlockdevBackupState {
BlockJob *job;
} BlockdevBackupState;
-static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
+static void blockdev_backup_commit(void *opaque);
+static void blockdev_backup_abort(void *opaque);
+static void blockdev_backup_clean(void *opaque);
+TransactionActionDrv blockdev_backup_drv = {
+ .commit = blockdev_backup_commit,
+ .abort = blockdev_backup_abort,
+ .clean = blockdev_backup_clean,
+};
+
+static void blockdev_backup_action(BlkActionState *common, Transaction *tran,
+ Error **errp)
{
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common,
common);
BlockdevBackup *backup;
@@ -1874,6 +1907,8 @@ static void blockdev_backup_prepare(BlkActionState
*common, Error **errp)
AioContext *old_context;
int ret;
+ tran_add(tran, &blockdev_backup_drv, state);
+
assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
backup = common->action->u.blockdev_backup.data;
@@ -1912,9 +1947,9 @@ static void blockdev_backup_prepare(BlkActionState
*common, Error **errp)
aio_context_release(aio_context);
}
-static void blockdev_backup_commit(BlkActionState *common)
+static void blockdev_backup_commit(void *opaque)
{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common,
common);
+ BlockdevBackupState *state = opaque;
AioContext *aio_context;
aio_context = bdrv_get_aio_context(state->bs);
@@ -1926,18 +1961,18 @@ static void blockdev_backup_commit(BlkActionState
*common)
aio_context_release(aio_context);
}
-static void blockdev_backup_abort(BlkActionState *common)
+static void blockdev_backup_abort(void *opaque)
{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common,
common);
+ BlockdevBackupState *state = opaque;
if (state->job) {
job_cancel_sync(&state->job->job, true);
}
}
-static void blockdev_backup_clean(BlkActionState *common)
+static void blockdev_backup_clean(void *opaque)
{
- BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common,
common);
+ g_autofree BlockdevBackupState *state = opaque;
AioContext *aio_context;
if (!state->bs) {
@@ -1961,14 +1996,22 @@ typedef struct BlockDirtyBitmapState {
bool was_enabled;
} BlockDirtyBitmapState;
-static void block_dirty_bitmap_add_prepare(BlkActionState *common,
- Error **errp)
+static void block_dirty_bitmap_add_abort(void *opaque);
+TransactionActionDrv block_dirty_bitmap_add_drv = {
+ .abort = block_dirty_bitmap_add_abort,
+ .clean = g_free,
+};
+
+static void block_dirty_bitmap_add_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
Error *local_err = NULL;
BlockDirtyBitmapAdd *action;
BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
common, common);
+ tran_add(tran, &block_dirty_bitmap_add_drv, state);
+
if (action_check_completion_mode(common, errp) < 0) {
return;
}
@@ -1988,13 +2031,12 @@ static void
block_dirty_bitmap_add_prepare(BlkActionState *common,
}
}
-static void block_dirty_bitmap_add_abort(BlkActionState *common)
+static void block_dirty_bitmap_add_abort(void *opaque)
{
BlockDirtyBitmapAdd *action;
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
- action = common->action->u.block_dirty_bitmap_add.data;
+ 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.
*/
@@ -2003,13 +2045,23 @@ static void block_dirty_bitmap_add_abort(BlkActionState
*common)
}
}
-static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
- Error **errp)
+static void block_dirty_bitmap_restore(void *opaque);
+static void block_dirty_bitmap_free_backup(void *opaque);
+TransactionActionDrv block_dirty_bitmap_clear_drv = {
+ .abort = block_dirty_bitmap_restore,
+ .commit = block_dirty_bitmap_free_backup,
+ .clean = g_free,
+};
+
+static void block_dirty_bitmap_clear_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
common, common);
BlockDirtyBitmap *action;
+ tran_add(tran, &block_dirty_bitmap_clear_drv, state);
+
if (action_check_completion_mode(common, errp) < 0) {
return;
}
@@ -2030,31 +2082,37 @@ static void
block_dirty_bitmap_clear_prepare(BlkActionState *common,
bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
}
-static void block_dirty_bitmap_restore(BlkActionState *common)
+static void block_dirty_bitmap_restore(void *opaque)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
if (state->backup) {
bdrv_restore_dirty_bitmap(state->bitmap, state->backup);
}
}
-static void block_dirty_bitmap_free_backup(BlkActionState *common)
+static void block_dirty_bitmap_free_backup(void *opaque)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
hbitmap_free(state->backup);
}
-static void block_dirty_bitmap_enable_prepare(BlkActionState *common,
- Error **errp)
+static void block_dirty_bitmap_enable_abort(void *opaque);
+TransactionActionDrv block_dirty_bitmap_enable_drv = {
+ .abort = block_dirty_bitmap_enable_abort,
+ .clean = g_free,
+};
+
+static void block_dirty_bitmap_enable_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
BlockDirtyBitmap *action;
BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
common, common);
+ tran_add(tran, &block_dirty_bitmap_enable_drv, state);
+
if (action_check_completion_mode(common, errp) < 0) {
return;
}
@@ -2076,23 +2134,30 @@ static void
block_dirty_bitmap_enable_prepare(BlkActionState *common,
bdrv_enable_dirty_bitmap(state->bitmap);
}
-static void block_dirty_bitmap_enable_abort(BlkActionState *common)
+static void block_dirty_bitmap_enable_abort(void *opaque)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
if (!state->was_enabled) {
bdrv_disable_dirty_bitmap(state->bitmap);
}
}
-static void block_dirty_bitmap_disable_prepare(BlkActionState *common,
- Error **errp)
+static void block_dirty_bitmap_disable_abort(void *opaque);
+TransactionActionDrv block_dirty_bitmap_disable_drv = {
+ .abort = block_dirty_bitmap_disable_abort,
+ .clean = g_free,
+};
+
+static void block_dirty_bitmap_disable_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
BlockDirtyBitmap *action;
BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
common, common);
+ tran_add(tran, &block_dirty_bitmap_disable_drv, state);
+
if (action_check_completion_mode(common, errp) < 0) {
return;
}
@@ -2114,23 +2179,30 @@ static void
block_dirty_bitmap_disable_prepare(BlkActionState *common,
bdrv_disable_dirty_bitmap(state->bitmap);
}
-static void block_dirty_bitmap_disable_abort(BlkActionState *common)
+static void block_dirty_bitmap_disable_abort(void *opaque)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
if (state->was_enabled) {
bdrv_enable_dirty_bitmap(state->bitmap);
}
}
-static void block_dirty_bitmap_merge_prepare(BlkActionState *common,
- Error **errp)
+TransactionActionDrv block_dirty_bitmap_merge_drv = {
+ .commit = block_dirty_bitmap_free_backup,
+ .abort = block_dirty_bitmap_restore,
+ .clean = g_free,
+};
+
+static void block_dirty_bitmap_merge_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
BlockDirtyBitmapMerge *action;
BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
common, common);
+ tran_add(tran, &block_dirty_bitmap_merge_drv, state);
+
if (action_check_completion_mode(common, errp) < 0) {
return;
}
@@ -2142,13 +2214,23 @@ static void
block_dirty_bitmap_merge_prepare(BlkActionState *common,
errp);
}
-static void block_dirty_bitmap_remove_prepare(BlkActionState *common,
- Error **errp)
+static void block_dirty_bitmap_remove_commit(void *opaque);
+static void block_dirty_bitmap_remove_abort(void *opaque);
+TransactionActionDrv block_dirty_bitmap_remove_drv = {
+ .commit = block_dirty_bitmap_remove_commit,
+ .abort = block_dirty_bitmap_remove_abort,
+ .clean = g_free,
+};
+
+static void block_dirty_bitmap_remove_action(BlkActionState *common,
+ Transaction *tran, Error **errp)
{
BlockDirtyBitmap *action;
BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
common, common);
+ tran_add(tran, &block_dirty_bitmap_remove_drv, state);
+
if (action_check_completion_mode(common, errp) < 0) {
return;
}
@@ -2163,10 +2245,9 @@ static void
block_dirty_bitmap_remove_prepare(BlkActionState *common,
}
}
-static void block_dirty_bitmap_remove_abort(BlkActionState *common)
+static void block_dirty_bitmap_remove_abort(void *opaque)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
if (state->bitmap) {
bdrv_dirty_bitmap_skip_store(state->bitmap, false);
@@ -2174,21 +2255,28 @@ static void
block_dirty_bitmap_remove_abort(BlkActionState *common)
}
}
-static void block_dirty_bitmap_remove_commit(BlkActionState *common)
+static void block_dirty_bitmap_remove_commit(void *opaque)
{
- BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
- common, common);
+ BlockDirtyBitmapState *state = opaque;
bdrv_dirty_bitmap_set_busy(state->bitmap, false);
bdrv_release_dirty_bitmap(state->bitmap);
}
-static void abort_prepare(BlkActionState *common, Error **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)
{
+ tran_add(tran, &abort_drv, common);
error_setg(errp, "Transaction aborted using Abort action");
}
-static void abort_commit(BlkActionState *common)
+static void abort_commit(void *opaque)
{
g_assert_not_reached(); /* this action never succeeds */
}
@@ -2196,75 +2284,51 @@ static void abort_commit(BlkActionState *common)
static const BlkActionOps actions[] = {
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
.instance_size = sizeof(ExternalSnapshotState),
- .prepare = external_snapshot_prepare,
- .commit = external_snapshot_commit,
- .abort = external_snapshot_abort,
- .clean = external_snapshot_clean,
+ .action = external_snapshot_action,
},
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
.instance_size = sizeof(ExternalSnapshotState),
- .prepare = external_snapshot_prepare,
- .commit = external_snapshot_commit,
- .abort = external_snapshot_abort,
- .clean = external_snapshot_clean,
+ .action = external_snapshot_action,
},
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
.instance_size = sizeof(DriveBackupState),
- .prepare = drive_backup_prepare,
- .commit = drive_backup_commit,
- .abort = drive_backup_abort,
- .clean = drive_backup_clean,
+ .action = drive_backup_action,
},
[TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
.instance_size = sizeof(BlockdevBackupState),
- .prepare = blockdev_backup_prepare,
- .commit = blockdev_backup_commit,
- .abort = blockdev_backup_abort,
- .clean = blockdev_backup_clean,
+ .action = blockdev_backup_action,
},
[TRANSACTION_ACTION_KIND_ABORT] = {
.instance_size = sizeof(BlkActionState),
- .prepare = abort_prepare,
- .commit = abort_commit,
+ .action = abort_action,
},
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
.instance_size = sizeof(InternalSnapshotState),
- .prepare = internal_snapshot_prepare,
- .abort = internal_snapshot_abort,
- .clean = internal_snapshot_clean,
+ .action = internal_snapshot_action,
},
[TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
.instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_add_prepare,
- .abort = block_dirty_bitmap_add_abort,
+ .action = block_dirty_bitmap_add_action,
},
[TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
.instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_clear_prepare,
- .commit = block_dirty_bitmap_free_backup,
- .abort = block_dirty_bitmap_restore,
+ .action = block_dirty_bitmap_clear_action,
},
[TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = {
.instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_enable_prepare,
- .abort = block_dirty_bitmap_enable_abort,
+ .action = block_dirty_bitmap_enable_action,
},
[TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = {
.instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_disable_prepare,
- .abort = block_dirty_bitmap_disable_abort,
+ .action = block_dirty_bitmap_disable_action,
},
[TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = {
.instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_merge_prepare,
- .commit = block_dirty_bitmap_free_backup,
- .abort = block_dirty_bitmap_restore,
+ .action = block_dirty_bitmap_merge_action,
},
[TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] = {
.instance_size = sizeof(BlockDirtyBitmapState),
- .prepare = block_dirty_bitmap_remove_prepare,
- .commit = block_dirty_bitmap_remove_commit,
- .abort = block_dirty_bitmap_remove_abort,
+ .action = block_dirty_bitmap_remove_action,
},
/* Where are transactions for MIRROR, COMMIT and STREAM?
* Although these blockjobs use transaction callbacks like the backup job,
@@ -2306,14 +2370,11 @@ void qmp_transaction(TransactionActionList *dev_list,
TransactionActionList *dev_entry = dev_list;
bool has_props = !!props;
JobTxn *block_job_txn = NULL;
- BlkActionState *state, *next;
Error *local_err = NULL;
+ Transaction *tran = tran_new();
GLOBAL_STATE_CODE();
- QTAILQ_HEAD(, BlkActionState) snap_bdrv_states;
- QTAILQ_INIT(&snap_bdrv_states);
-
/* Does this transaction get canceled as a group on failure?
* If not, we don't really need to make a JobTxn.
*/
@@ -2329,6 +2390,7 @@ void qmp_transaction(TransactionActionList *dev_list,
while (NULL != dev_entry) {
TransactionAction *dev_info = NULL;
const BlkActionOps *ops;
+ BlkActionState *state;
dev_info = dev_entry->value;
dev_entry = dev_entry->next;
@@ -2343,38 +2405,23 @@ void qmp_transaction(TransactionActionList *dev_list,
state->action = dev_info;
state->block_job_txn = block_job_txn;
state->txn_props = props;
- QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
- state->ops->prepare(state, &local_err);
+ state->ops->action(state, tran, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto delete_and_fail;
}
}
- QTAILQ_FOREACH(state, &snap_bdrv_states, entry) {
- if (state->ops->commit) {
- state->ops->commit(state);
- }
- }
+ tran_commit(tran);
/* success */
goto exit;
delete_and_fail:
/* failure, and it is all-or-none; roll back all operations */
- QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) {
- if (state->ops->abort) {
- state->ops->abort(state);
- }
- }
+ tran_abort(tran);
exit:
- QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
- if (state->ops->clean) {
- state->ops->clean(state);
- }
- g_free(state);
- }
if (!has_props) {
qapi_free_TransactionProperties(props);
}
--
2.34.1
- [PATCH v9 0/6] block: refactor blockdev transactions, Vladimir Sementsov-Ogievskiy, 2023/05/10
- [PATCH v9 5/6] blockdev: use state.bitmap in block-dirty-bitmap-add action, Vladimir Sementsov-Ogievskiy, 2023/05/10
- [PATCH v9 2/6] blockdev: transactions: rename some things, Vladimir Sementsov-Ogievskiy, 2023/05/10
- [PATCH v9 1/6] blockdev: refactor transaction to use Transaction API,
Vladimir Sementsov-Ogievskiy <=
- [PATCH v9 4/6] blockdev: transaction: refactor handling transaction properties, Vladimir Sementsov-Ogievskiy, 2023/05/10
- [PATCH v9 3/6] blockdev: qmp_transaction: refactor loop to classic for, Vladimir Sementsov-Ogievskiy, 2023/05/10
- [PATCH v9 6/6] blockdev: qmp_transaction: drop extra generic layer, Vladimir Sementsov-Ogievskiy, 2023/05/10
- Re: [PATCH v9 0/6] block: refactor blockdev transactions, Vladimir Sementsov-Ogievskiy, 2023/05/10
- Re: [PATCH v9 0/6] block: refactor blockdev transactions, Kevin Wolf, 2023/05/11