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 bucket_alloc_state {
  12         u64     buckets_seen;
  13         u64     skipped_open;
  14         u64     skipped_need_journal_commit;
  15         u64     skipped_nocow;
  16         u64     skipped_nouse;
  17 };
  18
  19 #define BCH_WATERMARKS()                \
  20         x(btree_copygc)                 \
  21         x(btree)                        \
  22         x(copygc)                       \
  23         x(normal)                       \
  24         x(stripe)
  25
  26 enum bch_watermark {
  27 #define x(name) BCH_WATERMARK_##name,
  28         BCH_WATERMARKS()
  29 #undef x
  30         BCH_WATERMARK_NR,
  31 };
  32
  33 #define OPEN_BUCKETS_COUNT      1024
  34
  35 #define WRITE_POINT_HASH_NR     32
  36 #define WRITE_POINT_MAX         32
  37
  38 /*
  39  * 0 is never a valid open_bucket_idx_t:
  40  */
  41 typedef u16                     open_bucket_idx_t;
  42
  43 struct open_bucket {
  44         spinlock_t              lock;
  45         atomic_t                pin;
  46         open_bucket_idx_t       freelist;
  47         open_bucket_idx_t       hash;
  48
  49         /*
  50          * When an open bucket has an ec_stripe attached, this is the index of
  51          * the block in the stripe this open_bucket corresponds to:
  52          */
  53         u8                      ec_idx;
  54         enum bch_data_type      data_type:6;
  55         unsigned                valid:1;
  56         unsigned                on_partial_list:1;
  57
  58         u8                      dev;
  59         u8                      gen;
  60         u32                     sectors_free;
  61         u64                     bucket;
  62         struct ec_stripe_new    *ec;
  63 };
  64
  65 #define OPEN_BUCKET_LIST_MAX    15
  66
  67 struct open_buckets {
  68         open_bucket_idx_t       nr;
  69         open_bucket_idx_t       v[OPEN_BUCKET_LIST_MAX];
  70 };
  71
  72 struct dev_stripe_state {
  73         u64                     next_alloc[BCH_SB_MEMBERS_MAX];
  74 };
  75
  76 #define WRITE_POINT_STATES()            \
  77         x(stopped)                      \
  78         x(waiting_io)                   \
  79         x(waiting_work)                 \
  80         x(running)
  81
  82 enum write_point_state {
  83 #define x(n)    WRITE_POINT_##n,
  84         WRITE_POINT_STATES()
  85 #undef x
  86         WRITE_POINT_STATE_NR
  87 };
  88
  89 struct write_point {
  90         struct {
  91                 struct hlist_node       node;
  92                 struct mutex            lock;
  93                 u64                     last_used;
  94                 unsigned long           write_point;
  95                 enum bch_data_type      data_type;
  96
  97                 /* calculated based on how many pointers we're actually going to use: */
  98                 unsigned                sectors_free;
  99
 100                 struct open_buckets     ptrs;
 101                 struct dev_stripe_state stripe;
 102
 103                 u64                     sectors_allocated;
 104         } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 105
 106         struct {
 107                 struct work_struct      index_update_work;
 108
 109                 struct list_head        writes;
 110                 spinlock_t              writes_lock;
 111
 112                 enum write_point_state  state;
 113                 u64                     last_state_change;
 114                 u64                     time[WRITE_POINT_STATE_NR];
 115         } __attribute__((__aligned__(SMP_CACHE_BYTES)));
 116 };
 117
 118 struct write_point_specifier {
 119         unsigned long           v;
 120 };
 121
 122 #endif /* _BCACHEFS_ALLOC_TYPES_H */