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

   1 #ifndef _BUCKETS_TYPES_H
   2 #define _BUCKETS_TYPES_H
   3
   4 enum bucket_data_type {
   5         BUCKET_DATA     = 0,
   6         BUCKET_BTREE,
   7         BUCKET_PRIOS,
   8         BUCKET_JOURNAL,
   9         BUCKET_SB,
  10 };
  11
  12 struct bucket_mark {
  13         union {
  14         struct {
  15                 u64             counter;
  16         };
  17
  18         struct {
  19                 u8              gen;
  20
  21                 /* generation copygc is going to move this bucket into */
  22                 unsigned        copygc:1;
  23
  24                 unsigned        journal_seq_valid:1;
  25
  26                 /*
  27                  * If this bucket had metadata while at the current generation
  28                  * number, the allocator must increment its gen before we reuse
  29                  * it:
  30                  */
  31                 unsigned        had_metadata:1;
  32
  33                 unsigned        owned_by_allocator:1;
  34
  35                 unsigned        data_type:3;
  36
  37                 unsigned        nouse:1;
  38
  39                 u16             dirty_sectors;
  40                 u16             cached_sectors;
  41
  42                 /*
  43                  * low bits of journal sequence number when this bucket was most
  44                  * recently modified: if journal_seq_valid is set, this bucket
  45                  * can't be reused until the journal sequence number written to
  46                  * disk is >= the bucket's journal sequence number:
  47                  */
  48                 u16             journal_seq;
  49         };
  50         };
  51 };
  52
  53 struct bucket {
  54         union {
  55                 struct {
  56                         u16     read_prio;
  57                         u16     write_prio;
  58                 };
  59                 u16             prio[2];
  60         };
  61
  62         union {
  63                 struct bucket_mark      _mark;
  64                 const struct bucket_mark mark;
  65         };
  66 };
  67
  68 enum s_compressed {
  69         S_COMPRESSED,
  70         S_UNCOMPRESSED,
  71         S_COMPRESSED_NR,
  72 };
  73
  74 enum s_alloc {
  75         S_META,
  76         S_DIRTY,
  77         S_CACHED,
  78         S_ALLOC_NR,
  79 };
  80
  81 struct bch_dev_usage {
  82         u64                     buckets_dirty;
  83         u64                     buckets_cached;
  84         u64                     buckets_meta;
  85         u64                     buckets_alloc;
  86
  87         u64                     sectors[S_ALLOC_NR];
  88 };
  89
  90 struct bch_fs_usage {
  91         /* all fields are in units of 512 byte sectors: */
  92         u64                     s[S_COMPRESSED_NR][S_ALLOC_NR];
  93         u64                     persistent_reserved;
  94         u64                     online_reserved;
  95         u64                     available_cache;
  96 };
  97
  98 struct bucket_heap_entry {
  99         struct bucket *g;
 100         unsigned long val;
 101 };
 102
 103 /*
 104  * A reservation for space on disk:
 105  */
 106 struct disk_reservation {
 107         u64             sectors;
 108         u32             gen;
 109         unsigned        nr_replicas;
 110 };
 111
 112 #endif /* _BUCKETS_TYPES_H */