website-struct

Struct: elevator_mq_ops

Status

Regular

• In 4.4: Absent ⚠️
• In 4.8: Absent ⚠️
• In 4.10: Absent ⚠️
• In 4.13: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *);
      void (*started_request)(struct request *);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 4.15: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *);
      void (*started_request)(struct request *);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 4.18: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *);
      void (*started_request)(struct request *);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.0: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*started_request)(struct request *);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.3: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.4: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.8: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.11: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.13: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.15: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 5.19: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 6.2: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(blk_opf_t, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 6.5: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(blk_opf_t, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, blk_insert_t);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In 6.8: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(blk_opf_t, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, blk_insert_t);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

Arch

• In arm64: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In armhf: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In ppc64el: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In riscv64: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

Flavor

• In aws: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In azure: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In gcp: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

• In lowlatency: ✅

  struct elevator_mq_ops {
      int (*init_sched)(struct request_queue *, struct elevator_type *);
      void (*exit_sched)(struct elevator_queue *);
      int (*init_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*exit_hctx)(struct blk_mq_hw_ctx *, unsigned int);
      void (*depth_updated)(struct blk_mq_hw_ctx *);
      bool (*allow_merge)(struct request_queue *, struct request *, struct bio *);
      bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int);
      int (*request_merge)(struct request_queue *, struct request **, struct bio *);
      void (*request_merged)(struct request_queue *, struct request *, enum elv_merge);
      void (*requests_merged)(struct request_queue *, struct request *, struct request *);
      void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *);
      void (*prepare_request)(struct request *, struct bio *);
      void (*finish_request)(struct request *);
      void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool);
      struct request * (*dispatch_request)(struct blk_mq_hw_ctx *);
      bool (*has_work)(struct blk_mq_hw_ctx *);
      void (*completed_request)(struct request *, u64);
      void (*requeue_request)(struct request *);
      struct request * (*former_request)(struct request_queue *, struct request *);
      struct request * (*next_request)(struct request_queue *, struct request *);
      void (*init_icq)(struct io_cq *);
      void (*exit_icq)(struct io_cq *);
  };
  

Differences

Regular

• No changes between 4.13 and 4.15 ✅
• No changes between 4.15 and 4.18 ✅
• Changed between 4.18 and 5.0 ⚠️

  • Field type changed. void (*completed_request)(struct request *) ➡️ void (*completed_request)(struct request *, u64)
• Changed between 5.0 and 5.3 ⚠️

  • Field added. void (*depth_updated)(struct blk_mq_hw_ctx *)
  • Field removed. void (*started_request)(struct request *)
  • Field type changed. bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *) ➡️ bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int)
• No changes between 5.3 and 5.4 ✅
• Changed between 5.4 and 5.8 ⚠️

  • Field type changed. void (*prepare_request)(struct request *, struct bio *) ➡️ void (*prepare_request)(struct request *)
• No changes between 5.8 and 5.11 ✅
• Changed between 5.11 and 5.13 ⚠️

  • Field type changed. bool (*bio_merge)(struct blk_mq_hw_ctx *, struct bio *, unsigned int) ➡️ bool (*bio_merge)(struct request_queue *, struct bio *, unsigned int)
• No changes between 5.13 and 5.15 ✅
• No changes between 5.15 and 5.19 ✅
• Changed between 5.19 and 6.2 ⚠️

  • Field type changed. void (*limit_depth)(unsigned int, struct blk_mq_alloc_data *) ➡️ void (*limit_depth)(blk_opf_t, struct blk_mq_alloc_data *)
• Changed between 6.2 and 6.5 ⚠️

  • Field type changed. void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, bool) ➡️ void (*insert_requests)(struct blk_mq_hw_ctx *, struct list_head *, blk_insert_t)
• No changes between 6.5 and 6.8 ✅

Arch

• No changes between amd64 and arm64 ✅
• No changes between amd64 and armhf ✅
• No changes between amd64 and ppc64el ✅
• No changes between amd64 and riscv64 ✅

Flavor

• No changes between generic and aws ✅
• No changes between generic and azure ✅
• No changes between generic and gcp ✅
• No changes between generic and lowlatency ✅