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 /* kill, switch to bch_data_type */
   7 enum bucket_data_type {
   8         BUCKET_DATA     = 0,
   9         BUCKET_BTREE,
  10         BUCKET_JOURNAL,
  11         BUCKET_SB,
  12 };
  13
  14 struct bucket_mark {
  15         union {
  16         struct {
  17                 u64             counter;
  18         };
  19
  20         struct {
  21                 u8              gen;
  22                 u8              data_type:3,
  23                                 gen_valid:1,
  24                                 owned_by_allocator:1,
  25                                 nouse:1,
  26                                 journal_seq_valid:1,
  27                                 touched_this_mount:1;
  28                 u16             dirty_sectors;
  29                 u16             cached_sectors;
  30
  31                 /*
  32                  * low bits of journal sequence number when this bucket was most
  33                  * recently modified: if journal_seq_valid is set, this bucket
  34                  * can't be reused until the journal sequence number written to
  35                  * disk is >= the bucket's journal sequence number:
  36                  */
  37                 u16             journal_seq;
  38         };
  39         };
  40 };
  41
  42 struct bucket {
  43         u16                             prio[2];
  44
  45         union {
  46                 struct bucket_mark      _mark;
  47                 const struct bucket_mark mark;
  48         };
  49 };
  50
  51 /* kill, switch to bucket_data_type */
  52 enum s_alloc {
  53         S_META,
  54         S_DIRTY,
  55         S_ALLOC_NR,
  56 };
  57
  58 struct bch_dev_usage {
  59         u64                     buckets[S_ALLOC_NR];
  60         u64                     buckets_cached;
  61         u64                     buckets_alloc;
  62
  63         /* _compressed_ sectors: */
  64         u64                     sectors[S_ALLOC_NR];
  65         u64                     sectors_cached;
  66 };
  67
  68 struct bch_fs_usage {
  69         /* all fields are in units of 512 byte sectors: */
  70
  71         /* _uncompressed_ sectors: */
  72
  73         struct {
  74                 u64             data[S_ALLOC_NR];
  75                 u64             persistent_reserved;
  76         }                       s[BCH_REPLICAS_MAX];
  77
  78         u64                     online_reserved;
  79         u64                     available_cache;
  80 };
  81
  82 struct bucket_heap_entry {
  83         size_t                  bucket;
  84         struct bucket_mark      mark;
  85 };
  86
  87 typedef HEAP(struct bucket_heap_entry) bucket_heap;
  88
  89 /*
  90  * A reservation for space on disk:
  91  */
  92 struct disk_reservation {
  93         u64             sectors;
  94         u32             gen;
  95         unsigned        nr_replicas;
  96 };
  97
  98 #endif /* _BUCKETS_TYPES_H */