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

   1 #ifndef _BUCKETS_TYPES_H
   2 #define _BUCKETS_TYPES_H
   3
   4 #include "util.h"
   5
   6 struct bucket_mark {
   7         union {
   8         struct {
   9                 u64             counter;
  10         };
  11
  12         struct {
  13                 u8              gen;
  14                 u8              data_type:3,
  15                                 gen_valid:1,
  16                                 owned_by_allocator:1,
  17                                 nouse:1,
  18                                 journal_seq_valid:1;
  19                 u16             dirty_sectors;
  20                 u16             cached_sectors;
  21
  22                 /*
  23                  * low bits of journal sequence number when this bucket was most
  24                  * recently modified: if journal_seq_valid is set, this bucket
  25                  * can't be reused until the journal sequence number written to
  26                  * disk is >= the bucket's journal sequence number:
  27                  */
  28                 u16             journal_seq;
  29         };
  30         };
  31 };
  32
  33 struct bucket {
  34         u16                             prio[2];
  35
  36         union {
  37                 struct bucket_mark      _mark;
  38                 const struct bucket_mark mark;
  39         };
  40 };
  41
  42 struct bucket_array {
  43         struct rcu_head         rcu;
  44         u16                     first_bucket;
  45         size_t                  nbuckets;
  46         struct bucket           b[];
  47 };
  48
  49 struct bch_dev_usage {
  50         u64                     buckets[BCH_DATA_NR];
  51         u64                     buckets_alloc;
  52         u64                     buckets_unavailable;
  53
  54         /* _compressed_ sectors: */
  55         u64                     sectors[BCH_DATA_NR];
  56 };
  57
  58 /* kill, switch to bch_data_type? */
  59 enum s_alloc {
  60         S_META,
  61         S_DIRTY,
  62         S_ALLOC_NR,
  63 };
  64
  65 struct bch_fs_usage {
  66         /* all fields are in units of 512 byte sectors: */
  67         /* _uncompressed_ sectors: */
  68         u64                     online_reserved;
  69         u64                     available_cache;
  70
  71         struct {
  72                 u64             data[S_ALLOC_NR];
  73                 u64             persistent_reserved;
  74         }                       s[BCH_REPLICAS_MAX];
  75 };
  76
  77 /*
  78  * A reservation for space on disk:
  79  */
  80 struct disk_reservation {
  81         u64             sectors;
  82         u32             gen;
  83         unsigned        nr_replicas;
  84 };
  85
  86 struct copygc_heap_entry {
  87         u64                     offset;
  88         struct bucket_mark      mark;
  89 };
  90
  91 typedef HEAP(struct copygc_heap_entry) copygc_heap;
  92
  93 #endif /* _BUCKETS_TYPES_H */