git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/alloc_types.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_ALLOC_TYPES_H
   3 #define _BCACHEFS_ALLOC_TYPES_H
   4
   5 #include <linux/mutex.h>
   6 #include <linux/spinlock.h>
   7
   8 #include "clock_types.h"
   9 #include "fifo.h"
  10
  11 struct ec_bucket_buf;
  12
  13 #define BCH_ALLOC_RESERVES()            \
  14         x(btree_movinggc)               \
  15         x(btree)                        \
  16         x(movinggc)                     \
  17         x(none)
  18
  19 enum alloc_reserve {
  20 #define x(name) RESERVE_##name,
  21         BCH_ALLOC_RESERVES()
  22 #undef x
  23 };
  24
  25 #define OPEN_BUCKETS_COUNT      1024
  26
  27 #define WRITE_POINT_HASH_NR     32
  28 #define WRITE_POINT_MAX         32
  29
  30 /*
  31  * 0 is never a valid open_bucket_idx_t:
  32  */
  33 typedef u16                     open_bucket_idx_t;
  34
  35 struct open_bucket {
  36         spinlock_t              lock;
  37         atomic_t                pin;
  38         open_bucket_idx_t       freelist;
  39         open_bucket_idx_t       hash;
  40
  41         /*
  42          * When an open bucket has an ec_stripe attached, this is the index of
  43          * the block in the stripe this open_bucket corresponds to:
  44          */
  45         u8                      ec_idx;
  46         enum bch_data_type      data_type:3;
  47         unsigned                valid:1;
  48         unsigned                on_partial_list:1;
  49         int                     alloc_reserve:3;
  50
  51         unsigned                sectors_free;
  52         u8                      dev;
  53         u8                      gen;
  54         u64                     bucket;
  55         struct ec_stripe_new    *ec;
  56 };
  57
  58 #define OPEN_BUCKET_LIST_MAX    15
  59
  60 struct open_buckets {
  61         open_bucket_idx_t       nr;
  62         open_bucket_idx_t       v[OPEN_BUCKET_LIST_MAX];
  63 };
  64
  65 struct dev_stripe_state {
  66         u64                     next_alloc[BCH_SB_MEMBERS_MAX];
  67 };
  68
  69 struct write_point {
  70         struct hlist_node       node;
  71         struct mutex            lock;
  72         u64                     last_used;
  73         unsigned long           write_point;
  74         enum bch_data_type      data_type;
  75
  76         /* calculated based on how many pointers we're actually going to use: */
  77         unsigned                sectors_free;
  78
  79         struct open_buckets     ptrs;
  80         struct dev_stripe_state stripe;
  81 };
  82
  83 struct write_point_specifier {
  84         unsigned long           v;
  85 };
  86
  87 #endif /* _BCACHEFS_ALLOC_TYPES_H */