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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_BKEY_METHODS_H
   3 #define _BCACHEFS_BKEY_METHODS_H
   4
   5 #include "bkey.h"
   6
   7 struct bch_fs;
   8 struct btree;
   9 struct btree_trans;
  10 struct bkey;
  11 enum btree_node_type;
  12
  13 extern const char * const bch2_bkey_types[];
  14 extern const struct bkey_ops bch2_bkey_null_ops;
  15
  16 /*
  17  * key_invalid: checks validity of @k, returns 0 if good or -EINVAL if bad. If
  18  * invalid, entire key will be deleted.
  19  *
  20  * When invalid, error string is returned via @err. @rw indicates whether key is
  21  * being read or written; more aggressive checks can be enabled when rw == WRITE.
  22  */
  23 struct bkey_ops {
  24         int             (*key_invalid)(const struct bch_fs *c, struct bkey_s_c k,
  25                                        enum bkey_invalid_flags flags, struct printbuf *err);
  26         void            (*val_to_text)(struct printbuf *, struct bch_fs *,
  27                                        struct bkey_s_c);
  28         void            (*swab)(struct bkey_s);
  29         bool            (*key_normalize)(struct bch_fs *, struct bkey_s);
  30         bool            (*key_merge)(struct bch_fs *, struct bkey_s, struct bkey_s_c);
  31         int             (*trans_trigger)(struct btree_trans *, enum btree_id, unsigned,
  32                                          struct bkey_s_c, struct bkey_i *, unsigned);
  33         int             (*atomic_trigger)(struct btree_trans *, enum btree_id, unsigned,
  34                                           struct bkey_s_c, struct bkey_s_c, unsigned);
  35         void            (*compat)(enum btree_id id, unsigned version,
  36                                   unsigned big_endian, int write,
  37                                   struct bkey_s);
  38
  39         /* Size of value type when first created: */
  40         unsigned        min_val_size;
  41 };
  42
  43 extern const struct bkey_ops bch2_bkey_ops[];
  44
  45 static inline const struct bkey_ops *bch2_bkey_type_ops(enum bch_bkey_type type)
  46 {
  47         return likely(type < KEY_TYPE_MAX)
  48                 ? &bch2_bkey_ops[type]
  49                 : &bch2_bkey_null_ops;
  50 }
  51
  52 int bch2_bkey_val_invalid(struct bch_fs *, struct bkey_s_c,
  53                           enum bkey_invalid_flags, struct printbuf *);
  54 int __bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c, enum btree_node_type,
  55                         enum bkey_invalid_flags, struct printbuf *);
  56 int bch2_bkey_invalid(struct bch_fs *, struct bkey_s_c, enum btree_node_type,
  57                       enum bkey_invalid_flags, struct printbuf *);
  58 int bch2_bkey_in_btree_node(struct btree *, struct bkey_s_c, struct printbuf *);
  59
  60 void bch2_bpos_to_text(struct printbuf *, struct bpos);
  61 void bch2_bkey_to_text(struct printbuf *, const struct bkey *);
  62 void bch2_val_to_text(struct printbuf *, struct bch_fs *,
  63                       struct bkey_s_c);
  64 void bch2_bkey_val_to_text(struct printbuf *, struct bch_fs *,
  65                            struct bkey_s_c);
  66
  67 void bch2_bkey_swab_val(struct bkey_s);
  68
  69 bool bch2_bkey_normalize(struct bch_fs *, struct bkey_s);
  70
  71 static inline bool bch2_bkey_maybe_mergable(const struct bkey *l, const struct bkey *r)
  72 {
  73         return l->type == r->type &&
  74                 !bversion_cmp(l->version, r->version) &&
  75                 bpos_eq(l->p, bkey_start_pos(r));
  76 }
  77
  78 bool bch2_bkey_merge(struct bch_fs *, struct bkey_s, struct bkey_s_c);
  79
  80 static inline int bch2_mark_key(struct btree_trans *trans,
  81                 enum btree_id btree, unsigned level,
  82                 struct bkey_s_c old, struct bkey_s_c new,
  83                 unsigned flags)
  84 {
  85         const struct bkey_ops *ops = bch2_bkey_type_ops(old.k->type ?: new.k->type);
  86
  87         return ops->atomic_trigger
  88                 ? ops->atomic_trigger(trans, btree, level, old, new, flags)
  89                 : 0;
  90 }
  91
  92 enum btree_update_flags {
  93         __BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE = __BTREE_ITER_FLAGS_END,
  94         __BTREE_UPDATE_NOJOURNAL,
  95         __BTREE_UPDATE_PREJOURNAL,
  96         __BTREE_UPDATE_KEY_CACHE_RECLAIM,
  97
  98         __BTREE_TRIGGER_NORUN,          /* Don't run triggers at all */
  99
 100         __BTREE_TRIGGER_INSERT,
 101         __BTREE_TRIGGER_OVERWRITE,
 102
 103         __BTREE_TRIGGER_GC,
 104         __BTREE_TRIGGER_BUCKET_INVALIDATE,
 105         __BTREE_TRIGGER_NOATOMIC,
 106 };
 107
 108 #define BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE (1U << __BTREE_UPDATE_INTERNAL_SNAPSHOT_NODE)
 109 #define BTREE_UPDATE_NOJOURNAL          (1U << __BTREE_UPDATE_NOJOURNAL)
 110 #define BTREE_UPDATE_PREJOURNAL         (1U << __BTREE_UPDATE_PREJOURNAL)
 111 #define BTREE_UPDATE_KEY_CACHE_RECLAIM  (1U << __BTREE_UPDATE_KEY_CACHE_RECLAIM)
 112
 113 #define BTREE_TRIGGER_NORUN             (1U << __BTREE_TRIGGER_NORUN)
 114
 115 #define BTREE_TRIGGER_INSERT            (1U << __BTREE_TRIGGER_INSERT)
 116 #define BTREE_TRIGGER_OVERWRITE         (1U << __BTREE_TRIGGER_OVERWRITE)
 117
 118 #define BTREE_TRIGGER_GC                (1U << __BTREE_TRIGGER_GC)
 119 #define BTREE_TRIGGER_BUCKET_INVALIDATE (1U << __BTREE_TRIGGER_BUCKET_INVALIDATE)
 120 #define BTREE_TRIGGER_NOATOMIC          (1U << __BTREE_TRIGGER_NOATOMIC)
 121
 122 #define BTREE_TRIGGER_WANTS_OLD_AND_NEW         \
 123         ((1U << KEY_TYPE_alloc)|                \
 124          (1U << KEY_TYPE_alloc_v2)|             \
 125          (1U << KEY_TYPE_alloc_v3)|             \
 126          (1U << KEY_TYPE_alloc_v4)|             \
 127          (1U << KEY_TYPE_stripe)|               \
 128          (1U << KEY_TYPE_inode)|                \
 129          (1U << KEY_TYPE_inode_v2)|             \
 130          (1U << KEY_TYPE_snapshot))
 131
 132 static inline int bch2_trans_mark_key(struct btree_trans *trans,
 133                                       enum btree_id btree_id, unsigned level,
 134                                       struct bkey_s_c old, struct bkey_i *new,
 135                                       unsigned flags)
 136 {
 137         const struct bkey_ops *ops = bch2_bkey_type_ops(old.k->type ?: new->k.type);
 138
 139         return ops->trans_trigger
 140                 ? ops->trans_trigger(trans, btree_id, level, old, new, flags)
 141                 : 0;
 142 }
 143
 144 static inline int bch2_trans_mark_old(struct btree_trans *trans,
 145                                       enum btree_id btree_id, unsigned level,
 146                                       struct bkey_s_c old, unsigned flags)
 147 {
 148         struct bkey_i deleted;
 149
 150         bkey_init(&deleted.k);
 151         deleted.k.p = old.k->p;
 152
 153         return bch2_trans_mark_key(trans, btree_id, level, old, &deleted,
 154                                    BTREE_TRIGGER_OVERWRITE|flags);
 155 }
 156
 157 static inline int bch2_trans_mark_new(struct btree_trans *trans,
 158                                       enum btree_id btree_id, unsigned level,
 159                                       struct bkey_i *new, unsigned flags)
 160 {
 161         struct bkey_i deleted;
 162
 163         bkey_init(&deleted.k);
 164         deleted.k.p = new->k.p;
 165
 166         return bch2_trans_mark_key(trans, btree_id, level, bkey_i_to_s_c(&deleted), new,
 167                                    BTREE_TRIGGER_INSERT|flags);
 168 }
 169
 170 void bch2_bkey_renumber(enum btree_node_type, struct bkey_packed *, int);
 171
 172 void __bch2_bkey_compat(unsigned, enum btree_id, unsigned, unsigned,
 173                         int, struct bkey_format *, struct bkey_packed *);
 174
 175 static inline void bch2_bkey_compat(unsigned level, enum btree_id btree_id,
 176                                unsigned version, unsigned big_endian,
 177                                int write,
 178                                struct bkey_format *f,
 179                                struct bkey_packed *k)
 180 {
 181         if (version < bcachefs_metadata_version_current ||
 182             big_endian != CPU_BIG_ENDIAN)
 183                 __bch2_bkey_compat(level, btree_id, version,
 184                                    big_endian, write, f, k);
 185
 186 }
 187
 188 #endif /* _BCACHEFS_BKEY_METHODS_H */