drivers/md/dm-vdo/flush.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright 2023 Red Hat
   4  */
   5
   6 #ifndef VDO_FLUSH_H
   7 #define VDO_FLUSH_H
   8
   9 #include "funnel-workqueue.h"
  10 #include "types.h"
  11 #include "vio.h"
  12 #include "wait-queue.h"
  13
  14 /* A marker for tracking which journal entries are affected by a flush request. */
  15 struct vdo_flush {
  16         /* The completion for enqueueing this flush request. */
  17         struct vdo_completion completion;
  18         /* The flush bios covered by this request */
  19         struct bio_list bios;
  20         /* The wait queue entry for this flush */
  21         struct vdo_waiter waiter;
  22         /* Which flush this struct represents */
  23         sequence_number_t flush_generation;
  24 };
  25
  26 struct flusher;
  27
  28 int __must_check vdo_make_flusher(struct vdo *vdo);
  29
  30 void vdo_free_flusher(struct flusher *flusher);
  31
  32 thread_id_t __must_check vdo_get_flusher_thread_id(struct flusher *flusher);
  33
  34 void vdo_complete_flushes(struct flusher *flusher);
  35
  36 void vdo_dump_flusher(const struct flusher *flusher);
  37
  38 void vdo_launch_flush(struct vdo *vdo, struct bio *bio);
  39
  40 void vdo_drain_flusher(struct flusher *flusher, struct vdo_completion *completion);
  41
  42 void vdo_resume_flusher(struct flusher *flusher, struct vdo_completion *parent);
  43
  44 #endif /* VDO_FLUSH_H */