diff options
| -rw-r--r-- | blockdev.c | 309 |
1 files changed, 178 insertions, 131 deletions
diff --git a/blockdev.c b/blockdev.c index d141ca7a2d..3c72d40f51 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1210,10 +1210,7 @@ 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; /** @@ -1245,6 +1242,12 @@ 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) { @@ -1259,8 +1262,8 @@ 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; @@ -1279,6 +1282,8 @@ 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; @@ -1363,10 +1368,9 @@ 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; @@ -1390,10 +1394,9 @@ 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) { @@ -1416,8 +1419,17 @@ 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; @@ -1436,6 +1448,8 @@ 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) { @@ -1588,10 +1602,9 @@ 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); @@ -1607,10 +1620,9 @@ 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; @@ -1650,10 +1662,9 @@ 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) { @@ -1681,7 +1692,17 @@ 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; @@ -1698,6 +1719,8 @@ 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; @@ -1828,9 +1851,9 @@ 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); @@ -1842,18 +1865,18 @@ 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) { @@ -1874,7 +1897,17 @@ 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; @@ -1884,6 +1917,8 @@ 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; @@ -1922,9 +1957,9 @@ 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); @@ -1936,18 +1971,18 @@ 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) { @@ -1971,14 +2006,22 @@ 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; } @@ -1998,13 +2041,12 @@ 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. */ @@ -2013,13 +2055,23 @@ 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; } @@ -2040,31 +2092,37 @@ 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; } @@ -2086,23 +2144,30 @@ 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; } @@ -2124,23 +2189,30 @@ 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; } @@ -2152,13 +2224,23 @@ 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; } @@ -2173,10 +2255,9 @@ 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); @@ -2184,21 +2265,28 @@ 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 */ } @@ -2206,75 +2294,51 @@ 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, @@ -2316,14 +2380,11 @@ 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. */ @@ -2339,6 +2400,7 @@ 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; @@ -2353,38 +2415,23 @@ 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); } |