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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_JOURNAL_IO_H
   3 #define _BCACHEFS_JOURNAL_IO_H
   4
   5 /*
   6  * Only used for holding the journal entries we read in btree_journal_read()
   7  * during cache_registration
   8  */
   9 struct journal_replay {
  10         struct list_head        list;
  11         struct journal_ptr {
  12                 u8              dev;
  13                 u32             bucket;
  14                 u32             bucket_offset;
  15                 u64             sector;
  16         }                       ptrs[BCH_REPLICAS_MAX];
  17         unsigned                nr_ptrs;
  18
  19         /* checksum error, but we may want to try using it anyways: */
  20         bool                    bad;
  21         bool                    ignore;
  22         /* must be last: */
  23         struct jset             j;
  24 };
  25
  26 static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
  27                                         struct jset_entry *entry, unsigned type)
  28 {
  29         while (entry < vstruct_last(jset)) {
  30                 if (entry->type == type)
  31                         return entry;
  32
  33                 entry = vstruct_next(entry);
  34         }
  35
  36         return NULL;
  37 }
  38
  39 #define for_each_jset_entry_type(entry, jset, type)                     \
  40         for (entry = (jset)->start;                                     \
  41              (entry = __jset_entry_type_next(jset, entry, type));       \
  42              entry = vstruct_next(entry))
  43
  44 #define for_each_jset_key(k, _n, entry, jset)                           \
  45         for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)        \
  46                 vstruct_for_each_safe(entry, k, _n)
  47
  48 int bch2_journal_entry_validate(struct bch_fs *, const char *,
  49                                 struct jset_entry *, unsigned, int, int);
  50 void bch2_journal_entry_to_text(struct printbuf *, struct bch_fs *,
  51                                 struct jset_entry *);
  52
  53 void bch2_journal_ptrs_to_text(struct printbuf *, struct bch_fs *,
  54                                struct journal_replay *);
  55
  56 int bch2_journal_read(struct bch_fs *, struct list_head *, u64 *, u64 *);
  57
  58 void bch2_journal_write(struct closure *);
  59
  60 #endif /* _BCACHEFS_JOURNAL_IO_H */