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         u8                              ec_redundancy;
  45 };
  46
  47 struct bucket_array {
  48         struct rcu_head         rcu;
  49         u16                     first_bucket;
  50         size_t                  nbuckets;
  51         struct bucket           b[];
  52 };
  53
  54 struct bch_dev_usage {
  55         u64                     buckets_alloc;
  56         u64                     buckets_ec;
  57         u64                     buckets_unavailable;
  58
  59         struct {
  60                 u64             buckets;
  61                 u64             sectors; /* _compressed_ sectors: */
  62                 u64             fragmented;
  63         }                       d[BCH_DATA_NR];
  64 };
  65
  66 struct bch_fs_usage {
  67         /* all fields are in units of 512 byte sectors: */
  68
  69         u64                     online_reserved;
  70
  71         /* fields after online_reserved are cleared/recalculated by gc: */
  72         u64                     gc_start[0];
  73
  74         u64                     hidden;
  75         u64                     btree;
  76         u64                     data;
  77         u64                     cached;
  78         u64                     reserved;
  79         u64                     nr_inodes;
  80
  81         /* XXX: add stats for compression ratio */
  82 #if 0
  83         u64                     uncompressed;
  84         u64                     compressed;
  85 #endif
  86
  87         /* broken out: */
  88
  89         u64                     persistent_reserved[BCH_REPLICAS_MAX];
  90         u64                     replicas[];
  91 };
  92
  93 struct bch_fs_usage_short {
  94         u64                     capacity;
  95         u64                     used;
  96         u64                     free;
  97         u64                     nr_inodes;
  98 };
  99
 100 struct replicas_delta {
 101         s64                     delta;
 102         struct bch_replicas_entry r;
 103 } __packed;
 104
 105 struct replicas_delta_list {
 106         unsigned                size;
 107         unsigned                used;
 108
 109         struct                  {} memset_start;
 110         u64                     nr_inodes;
 111         u64                     persistent_reserved[BCH_REPLICAS_MAX];
 112         struct                  {} memset_end;
 113         struct replicas_delta   d[0];
 114 };
 115
 116 /*
 117  * A reservation for space on disk:
 118  */
 119 struct disk_reservation {
 120         u64                     sectors;
 121         u32                     gen;
 122         unsigned                nr_replicas;
 123 };
 124
 125 struct copygc_heap_entry {
 126         u8                      dev;
 127         u8                      gen;
 128         u8                      replicas;
 129         u16                     fragmentation;
 130         u32                     sectors;
 131         u64                     offset;
 132 };
 133
 134 typedef HEAP(struct copygc_heap_entry) copygc_heap;
 135
 136 #endif /* _BUCKETS_TYPES_H */