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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_BTREE_WRITE_BUFFER_TYPES_H
   3 #define _BCACHEFS_BTREE_WRITE_BUFFER_TYPES_H
   4
   5 #include "journal_types.h"
   6
   7 #define BTREE_WRITE_BUFERED_VAL_U64s_MAX        4
   8 #define BTREE_WRITE_BUFERED_U64s_MAX    (BKEY_U64s + BTREE_WRITE_BUFERED_VAL_U64s_MAX)
   9
  10 struct btree_write_buffered_key {
  11         u64                     journal_seq;
  12         unsigned                journal_offset;
  13         enum btree_id           btree;
  14         __BKEY_PADDED(k, BTREE_WRITE_BUFERED_VAL_U64s_MAX);
  15 };
  16
  17 union btree_write_buffer_state {
  18         struct {
  19                 atomic64_t      counter;
  20         };
  21
  22         struct {
  23                 u64             v;
  24         };
  25
  26         struct {
  27                 u64                     nr:23;
  28                 u64                     idx:1;
  29                 u64                     ref0:20;
  30                 u64                     ref1:20;
  31         };
  32 };
  33
  34 struct btree_write_buffer {
  35         struct mutex                    flush_lock;
  36         struct journal_entry_pin        journal_pin;
  37
  38         union btree_write_buffer_state  state;
  39         size_t                          size;
  40
  41         struct btree_write_buffered_key *keys[2];
  42 };
  43
  44 #endif /* _BCACHEFS_BTREE_WRITE_BUFFER_TYPES_H */