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-rw-r--r--drivers/md/dm-vdo/flush.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/md/dm-vdo/flush.h b/drivers/md/dm-vdo/flush.h
new file mode 100644
index 0000000000..97252d6656
--- /dev/null
+++ b/drivers/md/dm-vdo/flush.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2023 Red Hat
+ */
+
+#ifndef VDO_FLUSH_H
+#define VDO_FLUSH_H
+
+#include "funnel-workqueue.h"
+#include "types.h"
+#include "vio.h"
+#include "wait-queue.h"
+
+/* A marker for tracking which journal entries are affected by a flush request. */
+struct vdo_flush {
+ /* The completion for enqueueing this flush request. */
+ struct vdo_completion completion;
+ /* The flush bios covered by this request */
+ struct bio_list bios;
+ /* The wait queue entry for this flush */
+ struct vdo_waiter waiter;
+ /* Which flush this struct represents */
+ sequence_number_t flush_generation;
+};
+
+struct flusher;
+
+int __must_check vdo_make_flusher(struct vdo *vdo);
+
+void vdo_free_flusher(struct flusher *flusher);
+
+thread_id_t __must_check vdo_get_flusher_thread_id(struct flusher *flusher);
+
+void vdo_complete_flushes(struct flusher *flusher);
+
+void vdo_dump_flusher(const struct flusher *flusher);
+
+void vdo_launch_flush(struct vdo *vdo, struct bio *bio);
+
+void vdo_drain_flusher(struct flusher *flusher, struct vdo_completion *completion);
+
+void vdo_resume_flusher(struct flusher *flusher, struct vdo_completion *parent);
+
+#endif /* VDO_FLUSH_H */