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 #include <linux/darray_types.h>
   6
   7 struct journal_ptr {
   8         bool            csum_good;
   9         u8              dev;
  10         u32             bucket;
  11         u32             bucket_offset;
  12         u64             sector;
  13 };
  14
  15 /*
  16  * Only used for holding the journal entries we read in btree_journal_read()
  17  * during cache_registration
  18  */
  19 struct journal_replay {
  20         DARRAY_PREALLOCATED(struct journal_ptr, 8) ptrs;
  21
  22         bool                    csum_good;
  23         bool                    ignore;
  24         /* must be last: */
  25         struct jset             j;
  26 };
  27
  28 static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
  29                                         struct jset_entry *entry, unsigned type)
  30 {
  31         while (entry < vstruct_last(jset)) {
  32                 if (entry->type == type)
  33                         return entry;
  34
  35                 entry = vstruct_next(entry);
  36         }
  37
  38         return NULL;
  39 }
  40
  41 #define for_each_jset_entry_type(entry, jset, type)                     \
  42         for (entry = (jset)->start;                                     \
  43              (entry = __jset_entry_type_next(jset, entry, type));       \
  44              entry = vstruct_next(entry))
  45
  46 #define jset_entry_for_each_key(_e, _k)                                 \
  47         for (_k = (_e)->start;                                          \
  48              _k < vstruct_last(_e);                                     \
  49              _k = bkey_next(_k))
  50
  51 #define for_each_jset_key(k, entry, jset)                               \
  52         for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)\
  53                 jset_entry_for_each_key(entry, k)
  54
  55 int bch2_journal_entry_validate(struct bch_fs *, struct jset *,
  56                                 struct jset_entry *, unsigned, int,
  57                                 enum bkey_invalid_flags);
  58 void bch2_journal_entry_to_text(struct printbuf *, struct bch_fs *,
  59                                 struct jset_entry *);
  60
  61 void bch2_journal_ptrs_to_text(struct printbuf *, struct bch_fs *,
  62                                struct journal_replay *);
  63
  64 int bch2_journal_read(struct bch_fs *, u64 *, u64 *, u64 *);
  65
  66 CLOSURE_CALLBACK(bch2_journal_write);
  67
  68 static inline struct jset_entry *jset_entry_init(struct jset_entry **end, size_t size)
  69 {
  70         struct jset_entry *entry = *end;
  71         unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
  72
  73         memset(entry, 0, u64s * sizeof(u64));
  74         /*
  75          * The u64s field counts from the start of data, ignoring the shared
  76          * fields.
  77          */
  78         entry->u64s = cpu_to_le16(u64s - 1);
  79
  80         *end = vstruct_next(*end);
  81         return entry;
  82 }
  83
  84 #endif /* _BCACHEFS_JOURNAL_IO_H */