fs/bcachefs/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 "darray.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_blacklisted;
  24         bool                    ignore_not_dirty;
  25         /* must be last: */
  26         struct jset             j;
  27 };
  28
  29 static inline bool journal_replay_ignore(struct journal_replay *i)
  30 {
  31         return !i || i->ignore_blacklisted || i->ignore_not_dirty;
  32 }
  33
  34 static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
  35                                         struct jset_entry *entry, unsigned type)
  36 {
  37         while (entry < vstruct_last(jset)) {
  38                 if (entry->type == type)
  39                         return entry;
  40
  41                 entry = vstruct_next(entry);
  42         }
  43
  44         return NULL;
  45 }
  46
  47 #define for_each_jset_entry_type(entry, jset, type)                     \
  48         for (struct jset_entry *entry = (jset)->start;                  \
  49              (entry = __jset_entry_type_next(jset, entry, type));       \
  50              entry = vstruct_next(entry))
  51
  52 #define jset_entry_for_each_key(_e, _k)                                 \
  53         for (struct bkey_i *_k = (_e)->start;                           \
  54              _k < vstruct_last(_e);                                     \
  55              _k = bkey_next(_k))
  56
  57 #define for_each_jset_key(k, entry, jset)                               \
  58         for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)\
  59                 jset_entry_for_each_key(entry, k)
  60
  61 int bch2_journal_entry_validate(struct bch_fs *, struct jset *,
  62                                 struct jset_entry *, unsigned, int,
  63                                 enum bkey_invalid_flags);
  64 void bch2_journal_entry_to_text(struct printbuf *, struct bch_fs *,
  65                                 struct jset_entry *);
  66
  67 void bch2_journal_ptrs_to_text(struct printbuf *, struct bch_fs *,
  68                                struct journal_replay *);
  69
  70 int bch2_journal_read(struct bch_fs *, u64 *, u64 *, u64 *);
  71
  72 CLOSURE_CALLBACK(bch2_journal_write);
  73
  74 static inline struct jset_entry *jset_entry_init(struct jset_entry **end, size_t size)
  75 {
  76         struct jset_entry *entry = *end;
  77         unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
  78
  79         memset(entry, 0, u64s * sizeof(u64));
  80         /*
  81          * The u64s field counts from the start of data, ignoring the shared
  82          * fields.
  83          */
  84         entry->u64s = cpu_to_le16(u64s - 1);
  85
  86         *end = vstruct_next(*end);
  87         return entry;
  88 }
  89
  90 #endif /* _BCACHEFS_JOURNAL_IO_H */