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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BUCKETS_TYPES_H
   3 #define _BUCKETS_TYPES_H
   4
   5 #include "bcachefs_format.h"
   6 #include "util.h"
   7
   8 #define BUCKET_JOURNAL_SEQ_BITS         16
   9
  10 struct bucket_mark {
  11         union {
  12         atomic64_t      v;
  13
  14         struct {
  15         u8              gen;
  16         u8              data_type:3,
  17                         owned_by_allocator:1,
  18                         journal_seq_valid:1,
  19                         stripe:1;
  20         u16             dirty_sectors;
  21         u16             cached_sectors;
  22
  23         /*
  24          * low bits of journal sequence number when this bucket was most
  25          * recently modified: if journal_seq_valid is set, this bucket can't be
  26          * reused until the journal sequence number written to disk is >= the
  27          * bucket's journal sequence number:
  28          */
  29         u16             journal_seq;
  30         };
  31         };
  32 };
  33
  34 struct bucket {
  35         union {
  36                 struct bucket_mark      _mark;
  37                 const struct bucket_mark mark;
  38         };
  39
  40         u16                             io_time[2];
  41         u8                              oldest_gen;
  42         u8                              gc_gen;
  43         unsigned                        gen_valid:1;
  44 };
  45
  46 struct bucket_array {
  47         struct rcu_head         rcu;
  48         u16                     first_bucket;
  49         size_t                  nbuckets;
  50         struct bucket           b[];
  51 };
  52
  53 struct bch_dev_usage {
  54         u64                     buckets[BCH_DATA_NR];
  55         u64                     buckets_alloc;
  56         u64                     buckets_ec;
  57         u64                     buckets_unavailable;
  58
  59         /* _compressed_ sectors: */
  60         u64                     sectors[BCH_DATA_NR];
  61         u64                     sectors_fragmented;
  62 };
  63
  64 struct bch_fs_usage {
  65         /* all fields are in units of 512 byte sectors: */
  66
  67         u64                     online_reserved;
  68
  69         /* fields after online_reserved are cleared/recalculated by gc: */
  70         u64                     gc_start[0];
  71
  72         u64                     hidden;
  73         u64                     btree;
  74         u64                     data;
  75         u64                     cached;
  76         u64                     reserved;
  77         u64                     nr_inodes;
  78
  79         /* XXX: add stats for compression ratio */
  80 #if 0
  81         u64                     uncompressed;
  82         u64                     compressed;
  83 #endif
  84
  85         /* broken out: */
  86
  87         u64                     persistent_reserved[BCH_REPLICAS_MAX];
  88         u64                     replicas[];
  89 };
  90
  91 struct bch_fs_usage_short {
  92         u64                     capacity;
  93         u64                     used;
  94         u64                     free;
  95         u64                     nr_inodes;
  96 };
  97
  98 struct replicas_delta {
  99         s64                     delta;
 100         struct bch_replicas_entry r;
 101 } __packed;
 102
 103 struct replicas_delta_list {
 104         unsigned                size;
 105         unsigned                used;
 106
 107         struct                  {} memset_start;
 108         u64                     nr_inodes;
 109         u64                     persistent_reserved[BCH_REPLICAS_MAX];
 110         struct                  {} memset_end;
 111         struct replicas_delta   d[0];
 112 };
 113
 114 /*
 115  * A reservation for space on disk:
 116  */
 117 struct disk_reservation {
 118         u64                     sectors;
 119         u32                     gen;
 120         unsigned                nr_replicas;
 121 };
 122
 123 struct copygc_heap_entry {
 124         u8                      gen;
 125         u32                     sectors;
 126         u64                     offset;
 127 };
 128
 129 typedef HEAP(struct copygc_heap_entry) copygc_heap;
 130
 131 #endif /* _BUCKETS_TYPES_H */