drivers/md/bcache/request.h

   1 #ifndef _BCACHE_REQUEST_H_
   2 #define _BCACHE_REQUEST_H_
   3
   4 #include <linux/cgroup.h>
   5
   6 struct search {
   7         /* Stack frame for bio_complete */
   8         struct closure          cl;
   9
  10         struct bcache_device    *d;
  11         struct task_struct      *task;
  12
  13         struct bbio             bio;
  14         struct bio              *orig_bio;
  15         struct bio              *cache_miss;
  16         unsigned                cache_bio_sectors;
  17
  18         unsigned                recoverable:1;
  19         unsigned                unaligned_bvec:1;
  20
  21         unsigned                write:1;
  22         unsigned                writeback:1;
  23
  24         /* IO error returned to s->bio */
  25         short                   error;
  26         unsigned long           start_time;
  27
  28         /* Anything past op->keys won't get zeroed in do_bio_hook */
  29         struct btree_op         op;
  30 };
  31
  32 void bch_cache_read_endio(struct bio *, int);
  33 unsigned bch_get_congested(struct cache_set *);
  34 void bch_insert_data(struct closure *cl);
  35 void bch_btree_insert_async(struct closure *);
  36 void bch_cache_read_endio(struct bio *, int);
  37
  38 void bch_open_buckets_free(struct cache_set *);
  39 int bch_open_buckets_alloc(struct cache_set *);
  40
  41 void bch_cached_dev_request_init(struct cached_dev *dc);
  42 void bch_flash_dev_request_init(struct bcache_device *d);
  43
  44 extern struct kmem_cache *bch_search_cache, *bch_passthrough_cache;
  45
  46 struct bch_cgroup {
  47 #ifdef CONFIG_CGROUP_BCACHE
  48         struct cgroup_subsys_state      css;
  49 #endif
  50         /*
  51          * We subtract one from the index into bch_cache_modes[], so that
  52          * default == -1; this makes it so the rest match up with d->cache_mode,
  53          * and we use d->cache_mode if cgrp->cache_mode < 0
  54          */
  55         short                           cache_mode;
  56         bool                            verify;
  57         struct cache_stat_collector     stats;
  58 };
  59
  60 struct bch_cgroup *bch_bio_to_cgroup(struct bio *bio);
  61
  62 #endif /* _BCACHE_REQUEST_H_ */